SUPPORT ASSEMBLY, PROTECTION MECHANISM, MOTOR ASSEMBLY, AND ELECTRONIC DEVICE

A support assembly, includes a rotating shaft mechanism and a support portion. The rotating shaft mechanism includes a rotating assembly. The rotating assembly includes a first fastening piece, a second fastening piece, a connecting piece, and a connection rod assembly. The first fastening piece and the second fastening piece are located on a same side of the connecting piece. A first sliding slot is disposed on an end face that is of the first fastening piece and that faces the second fastening piece, and a second sliding slot is disposed on an end face that is of the second fastening piece and that faces the first fastening piece. The support portion includes a first support board, a second support board, and a third support board. The second support board is rotatively connected to the first support board and the third support board.

TECHNICAL FIELD

This application relates to the field of electronic device technologies, and in particular, to a support assembly, a protection mechanism, a motor assembly, and an electronic device.

BACKGROUND

Currently, a foldable electronic device such as a notebook computer or a two-in-one product usually needs to be manually opened. The foldable electronic device is turned on by turning on a power supply, and can be used only after login through keyboard input or a biometric fingerprint. This operation process involves a large quantity of steps and takes a long time, resulting in poor user experience.

With rapid development of foldable electronic devices, a user imposes an increasingly high requirement on use experience of the foldable electronic devices. In addition to the poor user experience caused by the foregoing complex operation process, in a process of manually opening or closing the foldable electronic device, an operation hand feel, operation safety, stable support of the foldable electronic device in an opened state, a thickness of the entire device in a closed state, and the like are all important factors that affect user experience.

On this basis, how to improve user experience of the foldable electronic device has become a difficult problem to be urgently resolved by a person skilled in the art.

SUMMARY

This application provides a support assembly, a protection mechanism, a motor assembly, and an electronic device, to improve use experience of a user.

According to a first aspect, a support assembly is provided. The support assembly may be used in a foldable electronic device. The support assembly may include a rotating shaft mechanism and a support portion. The rotating shaft mechanism may include a rotating assembly. The rotating assembly may be linked with the support portion. When the rotating assembly is disposed, the rotating assembly includes a first fastening piece, a second fastening piece, a connecting piece, and a connection rod assembly. The first fastening piece and the second fastening piece may serve as a support base of the entire rotating assembly. The first fastening piece and the second fastening piece are spaced. The first fastening piece and the second fastening piece are located on a same side of the connecting piece. In addition, a first sliding slot is disposed on an end face that is of the first fastening piece and that faces the second fastening piece, and a second sliding slot is disposed on an end face that is of the second fastening piece and that faces the first fastening piece. The connecting piece is rotatively connected to the connection rod assembly. The connection rod assembly may slide along the first sliding slot and the second sliding slot. When the support portion is disposed, the support portion includes a first support board, a second support board, and a third support board that are disposed around the rotating shaft mechanism, the second support board is located between the first support board and the third support board, and the second support board is rotatively connected to the first support board and the third support board. One end of the first support board is fixedly connected to the connecting piece. In this way, when the first support board rotates around the rotating shaft mechanism, the connection rod assembly may slide along the first sliding slot and the second sliding slot, and the connecting piece rotates around the connection rod assembly, so that the third support board can slide along a direction toward or away from the rotating shaft mechanism.

By using the support assembly provided in this application, a movement trajectory of the connection rod assembly may be set through designing specific forms of the first sliding slot and the second sliding slot. In addition, because the connecting piece is rotatively connected to the connection rod assembly, in a process in which the connection rod assembly moves along the specified movement trajectory, the connecting piece may move according to a specified movement trajectory. In addition, because the first support board is fixedly connected to the connecting piece, in a process in which a connecting rod moves according to the specified trajectory, the first support board may move along a specified trajectory, to drive the second support board to rotate and enable the third support board to slide along a specified trajectory in the direction toward or away from the rotating shaft mechanism. It should be noted that in a process in which the first support board moves and drives the third support board to slide along the direction toward or away from the rotating shaft mechanism, a triangular support structure surrounding the rotating shaft mechanism can be formed among the first support board, the second support board, and the third support board. This can help improve support stability of the support portion, thereby improving structural reliability of the support assembly.

In a possible implementation of this application, the rotating assembly may further include a main shaft. The main shaft penetrates the first fastening piece, the connection rod assembly, and the second fastening piece. The main shaft may be rotatively connected to the first fastening piece and the second fastening piece. In a process in which the main shaft rotates relative to the first fastening piece and the second fastening piece, the connection rod assembly may be driven to slide along the first sliding slot and the second sliding slot, to drive the connecting piece to rotate.

In addition, the rotating shaft mechanism may further include a cam and an auxiliary support mechanism. The cam and the main shaft are fastened relative to each other in a radial direction of the main shaft, so that the main shaft in a rotation process can drive the cam to rotate synchronously. A cam sliding slot may be further disposed on a surface of the cam. One end of the auxiliary support mechanism is accommodated in the cam sliding slot, and the other end of the auxiliary support mechanism may be connected to the third support board. In the rotation process of the main shaft, one end of the auxiliary support mechanism slides along the cam sliding slot, to drive the third support board to slide along the direction toward or away from the rotating shaft mechanism. In this way, sliding stability of the third support board can be improved, to help improve movement stability of the entire support portion.

In a possible implementation of this application, the rotating shaft mechanism may include two rotating assemblies. The two rotating assemblies are spaced. One cam is correspondingly disposed for each rotating assembly. In this implementation, the auxiliary support mechanism may be located between two rotating assemblies. When the auxiliary support mechanism is disposed, the auxiliary support mechanism may include a first support rod and a second support rod. The first support rod and the second support rod are disposed in a cross manner. Middle parts of the first support rod and the second support rod are hinged. In addition, one end of the first support rod is accommodated in one cam sliding slot, and the other end of the first support rod is hinged to the third support board. One end of the second support rod is accommodated in another cam sliding slot, and the other end of the second support rod is hinged to the third support board. The first support rod and the second support rod of the auxiliary support mechanism are disposed in the cross manner. Therefore, in a process in which the third support board slides along the direction away from the rotating shaft mechanism, the two support rods rotate around a hinge joint of the two support rods. In addition, movement trajectory s of the two support rods can be designed by properly designing the cam sliding slots, so that the two support rods can push the third support board to slide along the direction away from the rotating shaft mechanism, thereby improving sliding stability of the third support board.

In a possible implementation of this application, the support assembly may further include a keyboard body. The support portion may be rotatively connected to the keyboard body through a rotating shaft mechanism. That the third support board slides along the direction toward or away from the rotating shaft mechanism may also be understood as that the third support board slides along a direction toward or away from the keyboard body. In addition, a receptacle may be disposed in the keyboard body. At least a part of the third support board may be accommodated in the receptacle. The third support board can slide in the receptacle. In this way, when sliding stability of the third support board is improved, the third support board may be further hidden in the keyboard body, to improve appearance aesthetics of the support assembly.

In this application, when the third support board is disposed, the third support board includes an arc-shaped board segment and a straight board segment that are fixedly connected. The arc-shaped board segment is located between the second support board and the straight board segment. The second support board is rotatively connected to the arc-shaped board. When the third support board slides toward the keyboard body, the arc-shaped board segment may cover the rotating shaft mechanism, to prevent the rotating shaft mechanism from being exposed, thereby protecting the rotating shaft mechanism and improving appearance aesthetics of the support assembly. In addition, at least a part of the straight board segment of the third support board may be accommodated in the receptacle, to guide sliding of the third support board.

In a possible implementation of this application, the support assembly may further include a host support kit. The host support kit is fixedly connected to the connecting piece. The host support kit is located on a side that is of the first support board and that faces the keyboard body. The host support kit is fixedly connected to an end part that is of the first support board and that faces the connecting piece. The host support kit may be configured to support a host installed on the support assembly. In addition, a surface that is of the host support kit and that is in contact with the host may be set to an arc-shaped surface, to improve reliability of a connection between the host and the host support kit.

In this application, when the connection rod assembly is disposed, the connection rod assembly may include a first connection rod and a second connection rod. The first connection rod is located between the connecting piece and the second connection rod. The second connection rod is located between the first fastening piece and the second fastening piece. The main shaft penetrates the second connection rod. In the radial direction of the main shaft, the main shaft and the second connection rod are fastened relative to each other. Therefore, in the rotation process of the main shaft, the second connection rod can be driven to rotate synchronously. In addition, one end of the first connection rod is rotatively connected to the connecting piece, and the other end of the first connection rod is rotatively connected to the second connection rod. One end that is of a rotating shaft rotatively connected to the first connection rod and the second connection rod is located in the first sliding slot, and the other end of the rotating shaft is located in the second sliding slot. In this way, the rotating shaft rotatively connected to the first connection rod and the second connection rod slides in the first sliding slot and the second sliding slot, so that the connection rod assembly slides in the first sliding slot and the second sliding slot to drive the connecting piece to rotate.

When the connecting piece is disposed, the connecting piece may include a body portion. The body portion has a first edge and a second edge that are disposed opposite to each other. A first installation portion, a second installation portion, and a third installation portion are disposed on the first edge. The first installation portion and the second installation portion are spaced. The body portion includes a first face and a second face that are disposed opposite to each other. The first installation portion and the second installation portion extend in a direction away from the second face. The third installation portion is located on the second face. The third installation portion extends along a direction from the first edge to the second edge.

In this application, the rotating assembly further includes middle connection rods. There may be two middle connection rods. One end of one of the middle connection rods is rotatively connected to the first installation portion, and the other end of the middle connection rod is rotatively connected to the first fastening piece. One end of the other one of the middle connection rods is rotatively connected to the second installation portion, and the other end of the other middle connection rod is rotatively connected to the second fastening piece, so that a body of the rotating assembly can be rotatively connected to the two fastening pieces through the two middle connection rods. In addition, one end that is of the first connection rod and that faces the connecting piece is rotatively connected to an end part that is of the third installation portion and that is away from the first edge. In addition, because the rotating shaft rotatively connected to the first connection rod and the second connection rod slides in the first sliding slot and the second sliding slot, the first connection rod may move according to a specified movement trajectory through designing tracks of the first sliding slot and the second sliding slot, so that the connecting piece can rotate around the first connection rod according to a specified trajectory.

In a possible implementation of this application, the first support board may be fixedly connected to the first face of the connecting piece. In this way, the first support board and the connecting piece can rotate along a same movement trajectory.

When the support assembly provided in this application is used in an electronic device, different users have personalized requirements on an expansion angle of the electronic device. To meet use requirements of different users, in this application, the first support board can further hover in a specific rotation position under damping force without external force, so that an included angle between the first support board and the third support board meets the use requirements of the users. During specific implementation, the rotating assembly may further include a first elastic piece. The elastic piece is disposed on a side that is of the first fastening piece and that is away from the second fastening piece. Elastic force generated by the first elastic piece along an axis of the main shaft may be applied on the first fastening piece.

In addition, the rotating assembly further includes a first extrusion structure. The first extrusion structure may be located between the first fastening piece and the first elastic piece. The first extrusion structure may be sleeved on the main shaft. The first extrusion structure and the main shaft are fastened relative to each other in the radial direction of the main shaft. A deformation amount of the first elastic piece changes when the first extrusion structure rotates with the main shaft. Because the main shaft is rotatively connected to the first fastening piece, and the first extrusion mechanism and the main shaft can rotate synchronously, in the rotation process of the main shaft, the first extrusion mechanism and the first fastening piece may rotate relative to each other. However, the deformation amount of the first elastic piece changes, and the elastic force applied by the first elastic piece on the first extrusion structure changes. Therefore, extrusion force between the first extrusion mechanism and the first fastening piece changes, and damping force generated by sliding friction between the first extrusion mechanism and the first fastening piece changes. In this way, a hand feel of the user can be improved. In addition, when external force is removed, the first extrusion mechanism and the first fastening piece may stop relative rotation under damping force generated between the first extrusion mechanism and the first fastening piece, so that the support assembly hovers in a corresponding rotation position.

In this application, in order that the support assembly can stably stay in the specified rotation position, the rotating assembly may further include a second extrusion structure. The second extrusion structure is located between the first extrusion structure and the first fastening piece. The second extrusion structure is sleeved on the main shaft. The main shaft is rotatively connected to the second extrusion structure. In addition, the first elastic piece presses the first extrusion structure toward the second extrusion structure. A first slot is disposed on an end face that is of the first extrusion structure and that faces the first fastening piece. A first protrusion is disposed on an end face that is of the second extrusion structure and that faces the first extrusion structure. It may be understood that, when the first protrusion falls into the first slot, a total length of the first extrusion structure and the second extrusion structure is the smallest in an axial direction of the main shaft. In this case, the deformation amount of the first elastic piece is the smallest, and damping force generated between the first extrusion structure and the second extrusion structure is relatively small. When the first protrusion is located outside the first slot, a total length of the first extrusion structure and the second extrusion structure is the largest in an axial direction of the main shaft. In this case, the deformation amount of the first elastic piece is the largest, and damping force generated between the first extrusion structure and the second extrusion structure is relatively large. Therefore, the damping force generated between the first extrusion structure and the second extrusion structure can be adjusted through adjusting positions of disposing a first cam and a second slot, to adjust a position in which the support assembly can hover.

In a possible implementation of this application, the rotating assembly may further include a second elastic piece. The second elastic piece may be disposed on a side that is of the second fastening piece and that is away from the first fastening piece. Alternatively, a hollow region is disposed on the second connection rod, and the second elastic piece is disposed in the hollow region. In addition, the second elastic piece is sleeved on the main shaft. One end of the second elastic piece is fixedly connected to the main shaft, and the other end of the second elastic piece is fixedly connected to the second fastening piece. Because the main shaft can rotate around the second fastening piece, the second elastic piece can generate elastic force around the axial direction of the main shaft in the rotation process of the main shaft. By using the elastic force, a corresponding hand feel can be provided for the user in a process in which the user rotates the support assembly, thereby improving user experience.

In this application, the support assembly may further include a keyboard body. The support portion may be rotatively connected to the keyboard body through the rotating shaft assembly. In addition, the keyboard body includes a rotating shaft connecting piece, a frame assembly, and keys. The rotating shaft connecting piece can move with movement of the rotating shaft mechanism. Specifically, when the rotating shaft mechanism moves, the rotating shaft connecting piece can be driven to move along the direction toward or away from the rotating shaft mechanism. In this application, the keys may be in a plurality of rows disposed in parallel. Each row of the keys includes a plurality of keys. Quantities of keys in rows may be the same or different. This is not specifically limited in this application. Key slots are further disposed on the keyboard body. The keys may be accommodated in corresponding key slots. In addition, when the frame assembly is disposed, the frame assembly may include a first frame, a second frame, and horizontal rods. The first frame and the second frame may be disposed relative to each other. The first frame and the second frame are fixedly connected to the rotating shaft connecting piece. In this way, when the rotating shaft connecting piece moves, the first frame and the second frame can move with the rotating shaft connecting piece along the direction toward or away from the rotating shaft mechanism. The plurality of rows of the keys may be located between the first frame and the second frame. Each row of the keys may be arranged along a direction from the first frame to the second frame. One horizontal rod may be correspondingly disposed for each row of the keys. When the first frame and the second frame move with the rotating shaft connecting piece along the direction toward or away from the rotating shaft mechanism, the horizontal rods may be driven to move along the arrangement direction of each row of the keys. In addition, with movement of the horizontal rods, the keys may move toward the key slots or move in a direction of coming out of the key slots. On this basis, when the keyboard body is in a using state, the keys may move along specified trajectories in the direction of coming out of the key slots, to meet a use requirement of the user for input through hitting. In addition, when the keyboard body is not used, the keys may move toward the key slots. In this way, parts that are of the keys and that come out of the key slots are relatively small, so that a size of the entire keyboard body is relatively small in a thickness direction, to help implement a thin design of the support assembly.

In order that the rotating shaft mechanism can drive the rotating shaft connecting piece to rotate, in a possible implementation of this application, the rotating assembly may further include a third connection rod. The third connection rod is connected to the second fastening piece in a sliding manner. In the rotation process of the main shaft, the third connection rod may slide along a direction of approaching or leaving the keyboard body. On this basis, the rotating shaft connecting piece may be fixedly connected to the third connection rod. Therefore, the third connection rod slides to drive the rotating shaft connecting piece to slide along the direction of approaching or leaving the keyboard body.

In addition, to improve sliding stability of the third connection rod, in this application, a slide may be disposed on the second fastening piece, and the third connection rod may be accommodated in the slide and can slide along the slide. In this case, the slide may guide sliding of the third connection rod, to help improve sliding reliability of the third connection rod.

A fourth connection rod may be further disposed on the rotating assembly. The fourth connection rod is fixedly connected to the second fastening piece. A connection manner may be but is not limited to a tight connection by using a fastener such as a screw. In addition, the fourth connection rod may be disposed on an outer side of the slide, and the third connection rod is limited in the slide, so that the third connection rod can be prevented from falling off the slide, thereby improving reliability of a sliding connection between the third connection rod and the second fastening piece.

According to a second aspect, an electronic device is provided. The electronic device may include a host and the support assembly in the first aspect. The host is detachably connected to a first support board. By using the electronic device provided in this application, the host may move with the first support board along a specified trajectory. In addition, in a process in which the first support board moves and drives a third support board to slide along a direction toward or away from a rotating shaft mechanism, a triangular support structure surrounding the rotating shaft mechanism can be formed among the first support board, a second support board, and the third support board. This can help improve support stability of a support portion for the host, thereby improving structural reliability of the electronic device.

The host may be a user terminal including a display and a processor, for example, a tablet computer or a mobile phone. When the host and the support assembly are integrated, the electronic device is a user terminal that has functions such as a fold function and a support function that can be implemented by the support assembly.

According to a third aspect, a protection mechanism is provided. The protection mechanism includes a fastening frame, a first rotating shaft assembly, a second rotating shaft assembly, a first conversion bracket, and a motor connecting piece. The fastening frame may serve as a base of the entire protection mechanism, to support the entire protection mechanism. When the fastening frame is disposed, the fastening frame may include a first fastening plate and a second fastening plate. The first fastening plate and the second fastening plate are disposed relative to each other to form installation space between the first fastening plate and the second fastening plate.

The first rotating shaft assembly and the second rotating shaft assembly are both located in the installation space. The first rotating shaft assembly may include a first shaft and a first gear piece. One end of the first shaft is fastened to the first fastening plate, and the other end of the first shaft is fastened to the second fastening plate. The first gear piece is sleeved on the first shaft. The first gear piece can rotate around the first shaft. The second rotating shaft assembly includes a second shaft and a second gear piece. One end of the second shaft is fastened to the first fastening plate, and the other end of the second shaft extends toward the second fastening plate. The second gear piece is sleeved on the second shaft. The second gear piece can rotate around the second shaft. In addition, the first conversion bracket is located between the second gear piece and the second fastening plate, and the first conversion bracket is sleeved on the second shaft.

In this application, at least a part of the motor connecting piece is located on a side that is of the first conversion bracket and that is away from the first fastening plate. The motor connecting piece includes a rotation center per piece. An end part that is of the second shaft and that faces the second fastening plate is inserted into the rotation center piece. An end that is of the rotation center piece and that is away from the first conversion bracket penetrates the second fastening plate. The rotation center piece may be configured to connect to a motor.

By using the protection mechanism provided in this application, when the motor drives the rotation center piece to rotate, and torque applied on the first conversion bracket is less than connection force between the first conversion bracket and the rotation center piece, the first conversion bracket is connected to the motor connecting piece. In this case, the first conversion bracket and the rotation center piece may rotate synchronously. In addition, the first conversion bracket may drive the first gear piece to rotate around the first shaft. Rotation torque of the first gear piece may be transmitted to the second rotating shaft assembly. When torque applied on the second rotating shaft assembly is transmitted to the first conversion bracket through the first gear piece, and torque applied on the first conversion bracket is greater than connection force between the first conversion bracket and the rotation center piece, the first conversion bracket may be disconnected from the motor connecting piece. Therefore, the following case is avoided: The torque that is greater than the connection force between the first conversion bracket and the rotation center piece is applied on the rotation center piece. In this way, the motor connected to the rotation center piece can be protected.

When the first gear piece is disposed, along a direction from the first fastening plate to the second fastening plate, the first gear piece may include a first gear structure and a second gear structure, and the first gear structure and the second gear structure are spaced. When the second gear piece is disposed, the second gear piece may include a third gear structure, and the third gear structure can be engaged with the first gear structure. In addition, the first conversion bracket may include a fourth gear structure, and the fourth gear structure is engaged with the second gear structure. In this way, when the first conversion bracket drives the first gear piece to rotate around the first shaft, the first gear piece slides along a direction from the first fastening plate to the second fastening plate, so that the third gear structure is detached from the first gear structure. However, when the third gear structure is detached from the first gear structure, rotation torque of the first gear piece is no longer transmitted to the third gear structure. In this case, the second gear piece stops rotating. In this application, a state in which the third gear structure is detached from the first gear structure may be a state in which the motor drives the protection mechanism to be opened to the largest angle.

It can be learned from the foregoing description that the first conversion bracket and the rotation center piece may be connected or disconnected. To implement the connection or disconnection between the first conversion bracket and the rotation center piece, specific structures of the first conversion bracket and the rotation center piece may be disposed. During specific implementation, the first conversion bracket may be provided with an accommodating cavity. An opening of the accommodating cavity faces the motor connecting piece. The rotation center piece may be inserted into the accommodating cavity. The first conversion bracket may be further provided with a first elastic piece and a rolling piece. The first elastic piece and the rolling piece are accommodated in the accommodating cavity. One end of the first elastic piece abuts against the rotation center piece, and the other end of the first elastic piece presses the rolling piece toward a bottom wall of the accommodating cavity.

In addition, a slot may be further disposed on the bottom wall of the accommodating cavity of the first conversion bracket. In this way, when the rolling piece is accommodated in the slot, the first conversion bracket and the rotation center piece are in a connected state. In this state, the first conversion bracket may rotate synchronously with the rotation center piece. When the rolling piece is detached from the slot, the first conversion bracket is disconnected from the rotation center piece. In this state, the rotation torque of the first conversion bracket cannot be transmitted to the rotation center piece. In this case, the rotation center piece stops rotating.

In a possible implementation of this application, a first stopper may be further disposed on an end part that is of the second gear piece and that faces the first fastening plate, and a notch is disposed on the first stopper. The second rotating shaft assembly may further include a fast pin and a sliding pin. The fast pin and the sliding pin are located on a side that is of the second gear piece and that faces the first fastening plate. The fast pin is sleeved on the second shaft. The fast pin is rotatively connected to the second shaft. The sliding pin is disposed between the fast pin and the first stopper. One end that is of the sliding pin and that faces the fast pin is connected to the fast pin in a sliding manner. A second stopper is disposed on one end that is of the sliding pin and that is away from the fast pin. The second stopper can be inserted into the notch. When the second stopper of the sliding pin is inserted into the notch, rotation of the second gear piece may drive the sliding pin to rotate, thereby driving the fast pin to rotate.

In a possible implementation of this application, a gasket may be further disposed between the sliding pin and the second gear piece. The sliding pin and the second gear piece both abut against the gasket. In this way, when the sliding pin and the second gear piece may rotate relative to each other, damping force can be generated between the sliding pin and the second gear piece, to help improve user experience.

To implement sliding of the first gear piece along the first shaft, in this application, a guide slot structure may be further disposed on the first gear piece. The guide slot structure may be located between the first gear structure and the first fastening plate. A guide slot may be disposed on the guide slot structure. The guide slot may be disposed in a spiral shape. In addition, a guide structure may be disposed on the fast pin, and the guide structure may be inserted into the guide slot. In this way, when the fast pin rotates, the guide structure can slide in the guide slot. However, the guide slot may be disposed in a spiral shape. In a process in which the guide structure slides in the guide slot, the first gear piece may be driven to slide along an axial direction of the first shaft, so that the third gear is detached from the first gear. In addition, in a rotation process of the fast pin, the sliding pin may slide with sliding of the first gear piece. A sliding direction of the sliding pin may be opposite to a sliding direction of the first gear piece.

In a possible implementation of this application, the first rotating shaft assembly may further include an assisting mechanism. One end of the assisting mechanism may be fixedly connected to the first gear piece, and the other end of the assisting mechanism is fixedly connected to the first shaft. In this way, the assisting mechanism is properly designed, so that the assisting mechanism can be configured to provide assistance for sliding of the first gear piece along the first shaft, to improve sliding reliability of the first gear piece.

According to a fourth aspect, a motor assembly is provided. The motor assembly includes the protection mechanism in the third aspect.

According to a fifth aspect, an electronic device is provided. The electronic device includes a first housing, a second housing, a rotating assembly, and the motor assembly in the fourth aspect. The first housing and the second housing are located on two sides of the rotating assembly. When the motor rotates, the first housing and the second housing may be driven to rotate relative to the rotating assembly. By using the electronic device provided in this application, a motor may drive the first housing and the second housing to rotate relative to the rotating assembly, to implement electrical opening and closing of the electronic device. In this way, operation steps performed by a user to open or close the electronic device can be simplified, thereby improving user experience.

The electronic device may be a user terminal including a display and a processor, for example, a notebook computer, a tablet computer, or a mobile phone. The first housing may be configured to install the display of the electronic device or carry a host with a display. The second housing may be configured to carry a keyboard body. The keyboard body may be the keyboard subject mentioned in the foregoing first aspect. The rotating assembly may be the rotating assembly mentioned in the foregoing first aspect.

In a possible implementation of this application, the rotating assembly is located on a side that is of a first fastening plate and that is away from a second fastening plate, and the rotating assembly and a second rotating shaft assembly rotate synchronously.

In a possible implementation of this application, the electronic device further includes a second conversion bracket. The second conversion bracket is located between the first fastening plate and the rotating assembly. The rotating assembly is connected to the second rotating shaft assembly in a transmission manner through the second conversion bracket.

According to a sixth aspect, a keyboard assembly is provided. The keyboard assembly may include a keyboard body. The keyboard body includes a rotating shaft connecting piece, a frame assembly, and keys. The rotating shaft connecting piece is connected to a rotating shaft mechanism. The rotating shaft connecting piece can move with movement of the rotating shaft mechanism. Specifically, when the rotating shaft mechanism moves, the rotating shaft connecting piece can be driven to move along a direction toward or away from the rotating shaft mechanism. In this application, the keys may be in a plurality of rows disposed in parallel. Each row of the keys includes a plurality of keys. Quantities of keys in rows may be the same or different. This is not specifically limited in this application. Key slots are further disposed on the keyboard body. The keys may be accommodated in corresponding key slots. In addition, when the frame assembly is disposed, the frame assembly may include a first frame, a second frame, and horizontal rods. The first frame and the second frame may be disposed relative to each other. The first frame and the second frame are fixedly connected to the rotating shaft connecting piece. In this way, when the rotating shaft connecting piece moves, the first frame and the second frame can move with the rotating shaft connecting piece along the direction toward or away from the rotating shaft mechanism. The plurality of rows of the keys may be located between the first frame and the second frame. Each row of the keys may be arranged along a direction from the first frame to the second frame. One horizontal rod may be correspondingly disposed for each row of the keys. When the first frame and the second frame move with the rotating shaft connecting piece along the direction toward or away from the rotating shaft mechanism, the horizontal rods may be driven to move along the arrangement direction of each row of the keys. In addition, with movement of the horizontal rods, the keys may move toward the key slots or move in a direction of coming out of the key slots. On this basis, when the keyboard assembly is in a using state, the keys may move along specified trajectories in the direction of coming out of the key slots, to meet a use requirement of the user for input through hitting. In addition, when the keyboard assembly is not used, the keys may move toward the key slots. In this way, parts that are of the keys and that come out of the key slots are relatively small, so that a size of the entire keyboard assembly is relatively small in a thickness direction, to help implement a thin design of the keyboard assembly.

In this application, when the first frame is disposed, the first frame may include a first inner frame and a first outer frame. The first outer frame is fixedly connected to the rotating shaft connecting piece. The first inner frame is located on a side that is of the first outer frame and that faces the keys. The first outer frame may be linked to the first inner frame. During specific implementation, a first connecting rod assembly is disposed between the first inner frame and the first outer frame. The first connecting rod assembly includes a first connecting rod and a second connecting rod. One end of the first connecting rod is hinged to the first inner frame, and the other end of the first connecting rod is hinged to the first outer frame. One end of the second connecting rod is hinged to a rod body of the first connecting rod, and the other end of the second connecting rod is hinged to a mechanical part that is in a fixed position on the keyboard body. In this way, in a process in which the rotating shaft connecting piece moves along the direction toward or away from the rotating shaft mechanism, the first outer frame may be driven to move along the direction toward or away from the rotating shaft mechanism, so that the first inner frame can be driven to move along the direction of approaching or leaving the first outer frame.

Similarly, when the second frame is disposed, the second frame may include a second inner frame and a second outer frame. The second outer frame is fixedly connected to the rotating shaft connecting piece. The second inner frame is located on a side that is of the second outer frame and that faces the keys. The second outer frame may be linked to the second inner frame. During specific implementation, a second connecting rod assembly is disposed between the second inner frame and the second outer frame. The second connecting rod assembly includes a third connecting rod and a fourth connecting rod. One end of the third connecting rod is hinged to the second inner frame, and the other end of the third connecting rod is hinged to the second outer frame. One end of the fourth connecting rod is hinged to a rod body of the third connecting rod, and the other end of the fourth connecting rod is hinged a mechanical part that is in a fixed position on the keyboard body. In this way, in a process in which the rotating shaft connecting piece moves along the direction toward or away from the rotating shaft mechanism, the second outer frame may be driven to move along the direction toward or away from the rotating shaft mechanism, so that the second inner frame can be driven to move along the direction of approaching or leaving the first outer frame.

In this application, in a process in which the first outer frame and the second outer frame move along the direction toward or away from the rotating shaft mechanism with rotation of the rotating mechanism, the first inner frame and the second inner frame may be driven to move in a same direction along the arrangement direction of each row of the keys. In this way, one end of the horizontal rod may be fixedly connected to the first inner frame, and the other end of the horizontal rod may be fixedly connected to the second inner frame, so that the horizontal rod can move along the arrangement direction of each row of the keys.

In addition, in a process in which the horizontal rod moves along the arrangement direction of each row of the keys, in order that the keys may move toward the key slots or move in the direction of coming out of the key slots with the movement of the horizontal rod, in a possible implementation of this application, the key may include a key cap and an up and down mechanism. The up and down mechanism may be located in the key slot. The key cap cover is disposed on the up and down mechanism. The up and down mechanism may be configured to drive the key cap to move back and forth in the direction toward or the direction of coming out of the key slot. In addition, first abutting structures are disposed on the horizontal rod, and second abutting structures are disposed on the up and down mechanism. In a process in which each horizontal rod moves along the arrangement direction of the keys, first abutting structures may be driven to press second abutting structures of a key in a corresponding row, to press an up and down mechanism to a key slot. The key slot driven by the up and down mechanism moves toward the key slot. It may be understood that, when extrusion force between the first abutting structure and the second abutting structure is removed, the up and down mechanism may go up in the direction of coming out of the key slot, to drive the key cap to move in the direction of coming out of the key slot.

In this application, a plurality of key slots may be disposed on the keyboard body, and a plurality of first abutting structures may be disposed on the horizontal rod. At least one abutting structure may be accommodated in each key slot. For example, two abutting structures may be accommodated in each key slot, to apply stable extrusion force on the up and down mechanism.

Force may be transmitted between the first abutting structure and the second abutting structure in a surface contact manner, to improve reliability of contact between the first abutting structure and the second abutting structure. For example, the first abutting structure may have a first inclined face, the second abutting structure may have a second inclined face, and the first inclined face and the second inclined face are disposed relative to each other. In this way, when the horizontal rod moves along the arrangement direction of each row of the keys, the first inclined face may be in contact with the second inclined face, so that the up and down mechanism can move toward the key slot.

In a possible implementation of this application, in order that the rotating shaft mechanism can drive the rotating shaft connecting piece to move, when the rotating shaft mechanism is disposed, the rotating shaft mechanism may include a rotating assembly. The rotating assembly may include a main shaft and a connection rod. As the main shaft rotates, the connection rod slides along a direction of approaching or leaving the keyboard body. In this way, the rotating shaft connecting piece may be fixedly connected to the connection rod. Therefore, the connection rod drives the rotating shaft connecting piece to slide along the direction of approaching or leaving the keyboard body.

In this application, to implement sliding of the connection rod, the rotating assembly may further include a fastening piece. The main shaft is rotatively connected to the fastening piece. The connection rod is connected to the fastening piece in a sliding manner. In addition, a stop portion is further disposed on the main shaft. A track slot is disposed on an end face that is of the stop portion and that faces the connection rod. Correspondingly, the connection rod has a connecting portion. The connecting portion is inserted into the track slot. In this way, in a rotation process of the main shaft, the connecting portion may be driven to slide in the track slot, to push the connection rod to slide in the direction of approaching or leaving the keyboard body.

In addition to the foregoing implementation, the sliding of the connection rod may be further implemented in another possible implementation. For example, the rotating assembly may further include a swing rod structure. The swing rod structure is sleeved on the main shaft. In a radial direction of the main shaft, the swing rod structure is fixedly connected to the main shaft, and the swing rod structure has a protruding portion. In addition, a connecting rod has a connecting portion. A track slot is disposed on the connecting portion. The track slot has a recessed portion. In this way, in a process in which the swing rod structure rotates with the main shaft, the protruding portion can be driven to slide along the track slot. When the protruding portion extends into the recessed portion, the connecting rod can be driven to slide in a sliding slot along the direction of approaching or leaving the keyboard body.

According to a seventh aspect, an electronic device is provided. The electronic device includes a host and the keyboard assembly in the sixth aspect. The host may be rotatively connected to a keyboard body through a rotating shaft mechanism. In this application, the rotating shaft mechanism may be fixedly connected to the keyboard body. By using the electronic device provided in this application, when the electronic device is opened, keys may move along specified trajectories in a direction of coming out of key slots, to meet a use requirement of a user for input through hitting keys. In addition, when the electronic device is closed, the keys may move toward the key slots. In this way, parts that are of the keys and that come out of the key slots are relatively small, so that a size of the entire keyboard assembly is relatively small in a thickness direction, to help implement a thin design of the keyboard assembly and implement a thin design of the electronic device in this state.

According to an eighth aspect, an electronic device is provided. The electronic device includes a display and the keyboard assembly in the sixth aspect. The display is rotatively connected to a keyboard body through a rotating shaft mechanism. In this application, the rotating shaft mechanism may be fixedly connected to the keyboard body, and the rotating shaft mechanism may be a part of the keyboard assembly. Alternatively, the rotating shaft mechanism does not belong to the keyboard assembly, but is a structure of the electronic device. By using the electronic device provided in this application, when the electronic device is opened, keys may move along specified trajectories in a direction of coming out of key slots, to meet a use requirement of a user for input through hitting keys. In addition, when the electronic device is closed, the keys may move toward the key slots. In this way, parts that are of the keys and that come out of the key slots are relatively small, so that a size of the entire keyboard assembly is relatively small in a thickness direction, to help implement a thin design of the keyboard assembly and implement a thin design of the electronic device in this state.

REFERENCE NUMERALS

1: host;2: keyboard assembly;201: keyboard body;2011: receptacle;2012: key;20121: key cap;20122: up and down mechanism;201221: second abutting structure;2012211: second inclined face;2013: keyboard cover;2014: rotating shaft connecting piece;2015: frame assembly;20151: first frame;201511: first inner frame;201512: first outer frame;20152: second frame;201521: second inner frame;201522: second outer frame;20153: horizontal rod;201531: first abutting structure;2015311: first inclined face;2016: first connecting rod assembly;20161: first connecting rod;201611: first end of the first connecting rod;201612: second end of the first connecting rod;20162: second connecting rod;201621: first end of the second connecting rod;201622: second end of the second connecting rod;2017: second connecting rod assembly;2018: key slot;202: support portion;2021: first support board;2021a: first edge of the first support board;2021b: second edge of the first support board;2022: second support board;2022a: first edge of the second support board;2022b: second edge of the second support board;2023: third support board;2023a: first edge of the third support board;2023b: second side of the third support board;20231: arc-shaped board segment;20232: straight board segment;20241: auxiliary support mechanism;202411: first support rod;202412: second support rod;20242: slide;20243: slide;20244: first sliding block;20245: second sliding block;3: rotating shaft mechanism;301: rotating assembly;3011: connecting piece;30111: body portion;30112: first installation portion;30113: second installation portion;30114: third installation portion;301141: connecting arm;3012: first fastening piece;30121: first open slot;3013: second fastening piece;30131: second open slot;30132: second sliding slot;30133: slide;301331: first limiting portion;3014: middle connection rod;3015a: first rotating shaft;3015b: second rotating shaft;3015c: second rotating shaft;3015d: fourth rotating shaft;3016: first connection rod;3017: second connection rod;30171: third open slot;30172: hollow region;3018: main shaft;30181: stop portion;301811: track slot;3019: elastic piece;3020: limiting piece;3021: gasket;3022: first extrusion structure;30221: first slot;3023: elastic piece;3024: third connection rod;30241: connecting portion;302411: track slot;3024111: recessed portion;30242: second limiting portion;3025: fourth connection rod;3026: second extrusion structure;30261: first protrusion;3027: rotation fastening piece;30271: locking slot;3028: sleeve;3029: swing rod structure;30291: protruding portion;303: cam;3031: cam sliding slot;304: automatic opening and closing apparatus;3041: motor;3042: protection mechanism;30421: fastening frame;304211: first fastening plate;304212: second fastening plate;30422: first rotating shaft assembly;304221: first shaft;304222: first gear piece;3042221: first gear structure;3042222: second gear structure;3042223: guide slot structure;30422231: guide slot;304223: assisting mechanism;30423: second rotating shaft assembly;304231: second shaft;304232: second gear piece;3042321: third gear structure;3042322: first stopper;30423221: notch;304233: fast pin;3042331: open slot;3042332: guide structure;304234: sliding pin;3042341: pin shaft;3042342: second stopper;304235: motor connecting piece;304236: gasket;30424: conversion bracket;304241: mounting hole;30425: conversion bracket;304251: fourth gear structure;304252: accommodating cavity;304253: elastic piece;304254: rolling piece;304255: press block;4: host support kit.

DESCRIPTION OF EMBODIMENTS

An embodiment of this application provides a keyboard assembly. To facilitate understanding of the keyboard assembly provided in this embodiment of this application, the following first describes an application scenario of the keyboard assembly. The keyboard assembly may be used in an electronic device, for example, a foldable electronic device. For example, the foldable electronic device may be but is not limited to a two-in-one product. The two-in-one product usually includes a host1and a keyboard assembly2.FIG.1shows a conventional two-in-one product according to an embodiment of this application. In this embodiment, the host1is detachably connected to the keyboard assembly2. After being detached from the keyboard assembly2, the host1can still be used as an independent electronic device. For example, the host1may be a tablet computer. In addition to a keyboard body201that can implement a keyboard function, the keyboard assembly2further includes a support portion202as a support structure, to support the host1and facilitate use by the user. For example, the keyboard assembly2may be a keyboard accessory used with the tablet computer. The keyboard assembly2can support the tablet computer, and can also be used as a keyboard.

It may be understood that, after the host1is installed on the keyboard assembly2, the keyboard body201and the support portion202of the keyboard assembly2rotate relative to each other, to open or close the two-in-one product. Relative rotation between the keyboard body201and the support portion202may be implemented by disposing a rotating shaft mechanism3. It can be learned fromFIG.1that the keyboard body201and the support portion202may be respectively located on two sides of the rotating shaft mechanism3, and may be rotatively connected to the rotating shaft mechanism3.

Currently, to reduce operation steps such as opening, powering on, and logging in in a process in which a user starts a foldable electronic device similar to the two-in-one product, a concept of automatic opening and closing is proposed in this field. Because the keyboard body201and the support portion202of the keyboard assembly2may implement relative rotation through the rotating shaft mechanism3, an automatic opening and closing apparatus for implementing an automatic opening and closing function may be disposed on the rotating shaft mechanism3. The automatic opening and closing apparatus usually includes a motor, to drive rotation of the rotating shaft mechanism3by using the motor, thereby implementing relative rotation of the keyboard body201and the support portion202.

However, to adapt to a current development trend of a lighter and thinner electronic device, installation space reserved for the rotating shaft mechanism3in the keyboard assembly2is increasingly limited. On this basis, if the automatic opening and closing apparatus is disposed on the rotating shaft mechanism3, a size of a structure such as a motor in the automatic opening and closing apparatus is required to be relatively small. However, if a size of the motor is excessively small, torque provided by the motor for rotation of the rotating shaft mechanism3is limited.

It can be learned from the foregoing description that, in the two-in-one product, the host1and the keyboard assembly2are in a structure form of a detachable connection, and a weight of the host1is generally greater than a weight of the keyboard assembly2. Therefore, when the two-in-one product is opened to a specific angle, support force of the keyboard assembly2for the host1is insufficient. The two-in-one product shakes in a movement process of the two-in-one product. In this case, the rotating shaft mechanism3may be even damaged.

In addition, because the user has a personalized requirement for a use angle of the two-in-one product, if a process in which the two-in-one product is driven to be opened or closed by using the motor is manually intervened, the motor or another mechanical part in the automatic opening and closing apparatus may be damaged when the torque provided by the motor is insufficient.

The rotating shaft mechanism provided in this application is intended to resolve the foregoing problem. A protection mechanism is disposed in the automatic opening and closing apparatus of the rotating shaft mechanism, to protect the automatic opening and closing apparatus in a scenario such as manual intervention, thereby implementing a safe and reliable automatic opening and closing function of the keyboard assembly. In this way, a service life of the keyboard assembly is prolonged. In addition, the rotating assembly is disposed in the rotating shaft mechanism, to implement hovering at any angle and stepless adjustment of opening and closing angles of the keyboard assembly. To facilitate understanding of the rotating shaft mechanism provided in this application, and the keyboard assembly and the electronic device to which the rotating shaft mechanism is used, the following describes the rotating shaft mechanism, the keyboard assembly, and the electronic device in detail with reference to specific embodiments.

It should be noted that terms used in the following embodiments are merely intended to describe specific embodiments, but are not intended to limit this application. The terms “one”, “a”, “the”, “the foregoing”, “this”, and “the one” of singular forms used in this specification and the appended claims of this application are also intended to include expressions such as “one or more”, unless otherwise specified in the context clearly.

Reference to “an embodiment”, “some embodiments”, or the like described in this specification indicates that one or more embodiments of this application include a specific feature, structure, or characteristic described with reference to the embodiments. Therefore, in this specification, statements such as “in an embodiment”, “in some embodiments”, “in other embodiments”, and “in some other embodiments” that appear at different places in this specification do not necessarily mean reference to a same embodiment, instead, they mean “one or more but not all of the embodiments”, unless otherwise specifically emphasized. The terms “include”, “comprise”, “have”, and their variants all mean “include but is not limited to”, unless otherwise specifically emphasized.

FIG.2is a schematic diagram of an application scenario of a rotating shaft mechanism according to an embodiment of this application.FIG.2shows a foldable electronic device. The electronic device includes a host1and a keyboard assembly2. The host1is detachably connected to the keyboard assembly2. In this application, the host1is a product having a complete structure and complete functions. After being detached from the keyboard assembly2, the host1can still be used as an independent electronic device. The host1in this application may include but is not limited to a display, a battery module, a computing storage module, and the like. In addition, the host1may also be provided with a contact or a connector interface matching an external device, for example, a pogo pin (pogo pin), USB, a Type-A connection interface, or a Type-C connection interface, to implement a wired connection between the host1and the external device. Alternatively, the host1may have functional modules such as Bluetooth and Wi-Fi, to implement a wireless connection between the host1and the external device. In this application, a type of the host1is not specifically limited. The host1may be but is not limited to a tablet computer, a palmtop computer (personal digital assistant, PDA), or the like.

FIG.3ais a schematic diagram of a structure of a keyboard assembly2according to an embodiment of this application. In this embodiment, the keyboard assembly2is in an opened state (that is, a support portion202is away from a keyboard body201, and the keyboard body201is in a state of being exposed to a user). The keyboard assembly2includes the keyboard body201and the support portion202. The keyboard body201may provide a keyboard input function for the host1. In addition, a control circuit, a battery, some sensors (such as an infrared sensor, an ultrasonic sensor, and a fingerprint sensor), or the like may be further disposed in the keyboard body201. The control circuit may be disposed to provide a circuit control function for the keyboard body201, and the sensor may be disposed to provide a function such as signal triggering. In addition, the battery in the keyboard body201may be configured to maintain a normal working state of the keyboard body201when there is no external power supply.

It can be learned from the foregoing embodiment that, relative rotation between the keyboard body201and the support portion202may be implemented by using a rotating shaft mechanism3. Further with reference toFIG.3a, in this embodiment, the keyboard assembly2further includes the rotating shaft mechanism3, and the keyboard body201may be connected to the rotating shaft mechanism3.

In this application, the support portion202of the keyboard assembly2includes a first support board2021, a second support board2022, and a third support board2023. The first support board2021, the second support board2022, and the third support board2023are disposed around the rotating shaft mechanism3. The first support board2021may support the host1shown inFIG.2. To fasten the host1installed on the keyboard assembly2and the first support board2021, in a possible embodiment of this application, a first magnetic element (not shown inFIG.3a) may be disposed in the first support board2021, and a second magnetic element may be disposed in a corresponding position of the host1. The first magnetic element and the second magnetic element may adsorb each other. In this application, the first magnetic element may be an element with a magnetic property, or may be an element without a magnetic property but can be absorbed by an element with a magnetic property. Similarly, the second magnetic element may be an element with a magnetic property, or may be an element without a magnetic property but can be absorbed by an element with a magnetic property. The first magnetic element and the second magnetic element can be mutually absorbed and fastened.

Still with reference toFIG.3a, the first support board2021has a first edge2021aand a second edge2021bthat are disposed opposite to each other. The first edge2021aof the first support board2021is disposed toward the rotating shaft mechanism. The first edge2021amay be fixedly connected to a host support kit4. The first support board2021may rotate around the rotating shaft mechanism. With reference to bothFIG.2andFIG.3a, the host support kit4may be configured to support the host1. In addition, an arc face may be disposed on the host support kit4. After the host1is installed on the host support kit4, a frame of the host1may be clamped to the arc face, to implement attachment and fastening between the host support kit4and the frame of the host1. This helps implement fastening between the host1and the first support board2021, to reduce a risk that the host1falls off the first support board2021. It may be understood that, in this application, a connector interface, a contact, or the like may be further disposed on the host support kit4, and the connector interface or the contact may be led to the control circuit in the keyboard body201through a lead. In this way, when the host1is installed on the keyboard assembly2, a contact or a connector interface of the host1may be connected to the corresponding contact or connector interface on the host support kit4, to implement an electrical connection between the host1and the keyboard assembly2, so that the host1can be operated and controlled by using the keyboard body201. It should be noted that, in this application, the lead for connecting the host support kit4and the control circuit of the keyboard body201may be hidden in the rotating shaft mechanism3, so that the lead is protected.

FIG.3bis a sectional view of a keyboard assembly according to an embodiment of this application. In this application, the second support board is located between the first support board2021and the third support board2023. The second support board2022may include a first edge2022aand a second edge2022bthat are disposed opposite to each other. The first edge2022aof the second support board2022is hinged to a surface that is of the first support board2021and that is away from the keyboard body201. In this case, the second support board2022can rotate relative to the first support board2021. In addition, the third support board2023includes a first edge2023aand a second edge2023bthat are disposed opposite to each other. The second edge2022bof the second support board2022is hinged to the first edge2023aof the third support board2023.

Still with reference toFIG.3b, in the embodiment shown inFIG.3b, the keyboard assembly2is in an opened state, and parts that are of the first support board2021, the second support board2022, and the third support board2023and that are disposed around the rotating shaft mechanism3form a triangular support structure. In this way, in a process of opening and closing the keyboard assembly2(that is, the support portion202approaches the keyboard body201, and the keyboard body201is covered by a part of the support portion202), the triangular support structure can implement stable support for the host1shown inFIG.2, and can further implement a relative rotation process between the support portion202of the keyboard assembly2and the keyboard body201. Therefore, a structure of the keyboard assembly2is relatively reliable.

FIG.4ais a schematic diagram of a structure of the electronic device provided inFIG.2in a closed state according to this application. It can be learned fromFIG.4athat, when the electronic device is in the closed state, the host1is attached to the keyboard body201, and at least a part of the second support board2022and the first support board2021cover the host1to protect the host1. In addition, in this application, the third support board2023includes an arc-shaped board segment20231and a straight board segment20232. A radian of the arc-shaped board segment20231may be designed based on a contour of the rotating shaft mechanism3. In this way, when the electronic device is in the closed state, the arc-shaped board segment20231can cover the rotating shaft mechanism3, to protect the rotating shaft mechanism3. In addition, appearance aesthetics of the keyboard assembly2can be improved.

By using the electronic device provided in this application, when the electronic device needs to be opened from the closed state, force F away from the keyboard body201may be applied on the host1and the first support board2021.FIG.4btoFIG.4eare schematic diagrams of a structure of an electronic device opened at different angles. It can be learned fromFIG.4btoFIG.4ethat, in a process of opening the electronic device, the first support board2021may drive the second support board2022to rotate in a direction away from the keyboard body201, and the second support board2022may rotate to drive the third support board2023to move in a direction away from the keyboard body201, so that the third support board2023is detached from the rotating shaft mechanism3.

In addition, still with reference toFIG.4atoFIG.4e, in the process of opening the electronic device, the parts that are of the first support board2021, the second support board2022, and the third support board2023and that are disposed around the rotating shaft mechanism3form the triangular support structure. The triangular support structure can effectively improve movement stability of the electronic device. It may be understood that, in a process in which the electronic device is changed from the opened state to the closed state, the first support board2021, the second support board2022, and the third support board2023all move toward the keyboard body201. In this process, the triangular support structure may also provide stable support for movement of the electronic device.

FIG.5is a schematic sectional view of a structure of a keyboard assembly in a closed state according to this application. It can be learned from the description of the foregoing embodiment that, in a process in which the keyboard assembly moves from the opened state to the closed state, the third support board2023moves in a direction toward the keyboard body201. In this application, a receptacle2011may be disposed in the keyboard body201, and an opening of the receptacle2011is provided toward the third support board2023. In this way, when the keyboard assembly2is in the closed state shown inFIG.5, at least a part of the straight board segment20232of the third support board2023can be accommodated in the receptacle2011, to improve an integration degree of an appearance of the keyboard assembly2. In addition, in some embodiments of this application, the second edge2023bof the third support board2023shown inFIG.3bmay be alternatively always located in the receptacle2011, and the third support board2023can slide in the receptacle2011, so that the receptacle2011can guide sliding of the third support board2023. To improve movement stability of the third support board2023, in some other embodiments of this application, a slide (not shown inFIG.5) may be disposed on a side wall of the receptacle2011; and a sliding block structure (not shown inFIG.5) is disposed on the third support board2023, and the sliding block structure can move along the slide, to reduce shaking of the third support board2023in a movement process, thereby improving movement stability of the entire keyboard assembly2.

It can be learned from the description of the foregoing embodiment that, the rotating shaft mechanism3plays an important role in a movement process of the keyboard assembly2from the opened state to the closed state and from the closed state to the opened state. To understand an implementation of movement of the keyboard assembly2provided in this application, the following describes in detail a specific manner of disposing the rotating shaft mechanism3with reference to the accompanying drawings.

It may be understood that, in order that the keyboard body201and the support portion202of the keyboard assembly2can be kept at any folding angle to meet a personalized use requirement of the user, a rotating assembly may be usually disposed in the rotating shaft mechanism3. Therefore, in a folding mode switching process of the keyboard assembly2, the rotating assembly can provide reliable damping force for the entire keyboard assembly2, thereby implementing stable support for the host1. In this application, a folding angle between the keyboard body201and the support portion202is an included angle between a surface that is of the keyboard body201and that faces the support portion202and a surface that is of the support portion202and that faces the keyboard body201, in a process in which the keyboard assembly2is changed from the opened state to the closed state and from the closed state to the opened state.

FIG.6ais a schematic diagram of a structure of a rotating assembly according to an embodiment of this application.FIG.6ais a schematic diagram of a structure of a rotating assembly301when the keyboard assembly2is in the closed state. In addition,FIG.6bis a schematic diagram of a structure of a rotating assembly301when the keyboard assembly2is in the opened state.

With reference to bothFIG.6aandFIG.6b, in this embodiment, the rotating assembly301may include a connecting piece3011, a first fastening piece3012, and a second fastening piece3013. The first fastening piece3012and the second fastening piece3013may be fixedly connected to the keyboard body201shown inFIG.5. A connection manner may be but is not limited to a tight connection by using a fastener such as a screw. In addition, the first fastening piece3012and the second fastening piece3013may serve as support kits of the entire rotating assembly301. The first fastening piece3012and the second fastening piece3013are spaced. Another structure of the rotating assembly301may be directly or indirectly connected to the first fastening piece3012and the second fastening piece3013.

For ease of understanding of a connection relationship between structures of the rotating assembly301, refer toFIG.7.FIG.7is an exploded view of the rotating assembly301shown inFIG.6aandFIG.6b. In this embodiment, the connecting piece3011includes a body portion30111disposed in a long-strip structure. The body portion30111may be fixedly connected to the host support kit4shown inFIG.3b. A connection manner may be but is not limited to a tight connection by using a fastener such as a screw. Still with reference toFIG.7, the body portion30111has a first edge. A first installation portion30112and a second installation portion30113are disposed on the first side. The first installation portion30112and the second installation portion30113are spaced. In addition, the body portion30111has a first face and a second face that are disposed opposite to each other. The first face may be configured to fixedly connect to the host support kit4. Because the first edge of the first support board2021is fixedly connected to the host support kit4, the first support board2021may be fixedly connected to the first face of the body portion30111through the host support kit4. The first installation portion30112and the second installation portion30113may extend in a direction away from the second face. The first installation portion30112may have a first installation slot. The second installation portion30113may have a second installation slot. Still with reference toFIG.7, a third installation portion30114may be further disposed on the first edge of the body portion30111. The third installation portion30114is located at the body portion30111. The body portion30111further has a second edge. The first edge and the second edge are disposed opposite to each other. The third installation portion30114may include two connecting arms301141that are disposed relative to each other. The two connecting arms301141extend in a direction from the first edge to the second edge of the body portion30111.

With reference to all ofFIG.6a,FIG.6b, andFIG.7, in this application, the first fastening piece3012and the second fastening piece3013are located on a same side of the connecting piece3011. The rotating assembly301may further include a connection rod assembly. The connection rod assembly includes middle connection rods3014. There are two middle connection rods3014. A first open slot30121is disposed on a surface on a side that is of the first fastening piece3012and that faces the connecting piece3011. A second open slot30131is disposed on a surface on a side that is of the second fastening piece3013and that faces the connecting piece3011. The middle connection rod3014includes a first end and a second end that are disposed opposite to each other. A first end of one middle connection rod3014is installed in the first installation slot of the first installation portion30112, and a second end of the middle connection rod3014is installed in the first open slot30121of the first fastening piece3012. In addition, the first end of the middle connection rod3014is rotatively connected to a slot wall of the first installation slot through a first rotating shaft3015a, and the second end of the middle connection rod3014is rotatively connected to the first open slot30121of the first fastening piece3012through a second rotating shaft3015b. To implement the rotative connection between the first end of the middle connection rod3014and the slot wall of the first installation slot, the first rotating shaft3015amay be fixedly connected to the first end of the first connection rod, and the first rotating shaft3015amay be rotatively connected to the slot wall of the first installation slot. In a rotative connection manner, mounting holes may be disposed on two opposite slot walls of the first installation slot, and two ends of the middle connection rod3014each are inserted into one mounting hole. In some other embodiments of this application, the first rotating shaft3015amay be further fixedly connected to the slot wall of the first installation slot, and the first end of the middle connection rod3014may rotate around the first rotating shaft3015a. In addition, in this embodiment, the second end of the middle connection rod3014may be rotatively connected to a slot wall of the first open slot30121of the first fastening piece3012through the second rotating shaft3015b. The second rotating shaft3015bmay be but is not limited to a pin shaft. It should be noted that in this application, for setting of a rotative connection manner of two mechanical parts, reference may be made to the manner of rotatively connecting the first end of the middle connection rod3014to the slot wall of the first installation slot through the first rotating shaft3015a. Details are not described in the following embodiments.

Similarly, a first end of the other middle connection rod3014may be installed in the second installation slot of the second installation portion30113of the connecting piece3011, and is rotatively connected to a slot wall of the second installation slot through the first rotating shaft3015a. The second end of the middle connection rod3014may be installed in the second open slot30131of the second fastening piece3013, and is rotatively connected to a slot wall of the second open slot30131through the second rotating shaft3015b. In addition, in this embodiment, the second end of the middle connection rod3014may be rotatively connected to the slot wall of the second open slot30131of the second fastening piece3013through the second rotating shaft3015b. The second rotating shaft3015bmay be but is not limited to a pin shaft.

Still with reference toFIG.6a,FIG.6b, andFIG.7, in this application, the connection rod assembly may further include a first connection rod3016and a second connection rod3017. The first connection rod3016includes a first end and a second end that are disposed opposite to each other. The first end of the first connection rod3016may be installed on the third installation portion30114of the connecting piece3011. The first end of the first connection rod3016is located between the two connecting arms301141. In addition, the first end of the first connection rod3016is rotatively connected to the two connecting arms301141through a third rotating shaft3015c. In addition, the second end of the first connection rod3016is rotatively connected to the second connection rod3017through a fourth rotating shaft3015d. A third open slot30171may be disposed at an end that is of the second connection rod3017and that is configured to connect to the first connection rod3016. The second end of the first connection rod3016may be installed in the third open slot30171, and the second end of the first connection rod3016is rotatively connected to a slot wall of the third open slot30171through the fourth rotating shaft3015d, so that a connection structure formed by the first connection rod3016and the second connection rod3017is relatively compact.

In addition, a first sliding slot (not shown inFIG.7) is disposed at an end face on a side that is of the first fastening piece3012and that faces the second fastening piece3013, and a second sliding slot30132is disposed at an end face on a side that is of the second fastening piece3013and that faces the first fastening piece3012. One end of the third rotating shaft3015cis inserted into the first sliding slot and can slide along the first sliding slot, and the other end of the third rotating shaft3015cmay be inserted into the second sliding slot30132and can slide along the second sliding slot30132. It may be understood that the connection rod assembly can slide along the first sliding slot and the second sliding slot30132.

In this application, a movement trajectory of the third rotating shaft3015cmay be set by designing specific forms of the first sliding slot and the second sliding slot30132. In addition, because the first end of the first connection rod3016is rotatively connected to the connecting piece3011through the third rotating shaft3015c, in a process in which the third rotating shaft3015cmoves along the specified movement trajectory, a connection part between the second end of the first connection rod3016and the connecting piece3011can move according to a specified movement track.

For example,FIG.8ais a sectional view along A-A of the rotating assembly301shown inFIG.6a.FIG.8ashows a position of the third rotating shaft3015cin the second sliding slot30132when the keyboard assembly2is in the closed state, that is, when the included angle between the surface that is of the keyboard body201and that faces the support portion202and the surface that is of the support portion202and that faces the keyboard body201is approximately 0°. In the state shown inFIG.8a, the third rotating shaft3015cis located at the highest point of the second sliding slot30132. In addition, when the rotating assembly301is used on the keyboard assembly2, in the state shown inFIG.8a, the third rotating shaft3015cis located at an end that is of the second sliding slot30132and that is the furthest from the keyboard body201.

In a process in which the keyboard assembly2moves from the closed state to the opened state, the third rotating shaft3015ccan slide along the second sliding slot30132.FIG.8bshows a position of the third rotating shaft3015cin the second sliding slot30132when the keyboard assembly2is in an intermediate state from the closed state to the opened state. In the state shown inFIG.8b, the included angle between the surface that is of the keyboard body201and that faces the support portion202and the surface that is of the support portion202and that faces the keyboard body201may be approximately 45. Through comparison betweenFIG.8aandFIG.8b, it can be learned that, in the process of opening the keyboard assembly2, the third rotating shaft3015cslides in a direction toward the keyboard body along the second sliding slot30132.

When the keyboard assembly is continuously opened in the state shown inFIG.8b, refer toFIG.8c.FIG.8cshows a position of the third rotating shaft3015cin the second sliding slot30132when the included angle between the surface that is of the keyboard body201and that faces the support portion202and the surface that is of the support portion202and that faces the keyboard body201is approximately 110°. Further refer toFIG.8d.FIG.8dshows a position of the third rotating shaft3015cin the second sliding slot30132when the included angle between the surface that is of the keyboard body201and that faces the support portion202and the surface that is of the support portion202and that faces the keyboard body201is the largest (for example, approximately 130°). In this case, the third rotating shaft3015cis located at an end that is of the second sliding slot30132and that is the closest to the keyboard body201. It can be learned fromFIG.8atoFIG.8dthat, in this application, the movement trajectory of the connecting piece3011can be set by designing a specific form of the second sliding slot30132.

Still with reference toFIG.6a,FIG.6b, andFIG.7, in this application, the rotating assembly301may further include a main shaft3018, and the main shaft3018may sequentially penetrate the first fastening piece3012, the second connection rod3017, and the second fastening piece3013. The main shaft3018is rotatively connected to the first fastening piece3012and the second fastening piece3013. The main shaft3018can rotate relative to the first fastening piece3012and the second fastening piece3013. In addition, in a radial direction of the main shaft3018, the second connection rod3017and the main shaft3018are fastened relative to each other. In this case, the second connection rod3017and the main shaft3018may rotate synchronously around an axis of the main shaft3018. In a possible embodiment of this application, to relatively fasten the second connection rod3017and the main shaft3018in the radial direction, an irregular hole may be disposed on the second connection rod3017. For example, the irregular hole may be but is not limited to a D-shaped hole. In addition, a section of a part that is of the main shaft3018and that penetrates the second connection rod3017is also set to an irregular section that can match the irregular hole, to implement limiting of the second connection rod3017and the main shaft3018in the radial direction.

In addition, a stop portion30181may be further disposed at an end that is of the main shaft3018, that is located on the second fastening piece3013, and that is away from the first fastening piece3012, to limit the main shaft3018along an axial direction and reduce fluttering of the main shaft3018along the axial direction, thereby improving movement stability of the entire rotating assembly301.

In this application, in order that the rotating assembly301can provide damping force in a corresponding rotation position for the rotating shaft mechanism in an entire movement process of the entire rotating shaft mechanism to keep the rotating shaft mechanism in the corresponding rotation position, still with reference toFIG.7, in a possible embodiment of this application, an elastic piece3019may be further disposed on the rotating assembly301, and the elastic piece3019may accumulate elastic force when being pressed. As shown inFIG.7, the elastic piece3019may be disposed on a side that is of the first fastening piece3012and that is away from the second fastening piece3013. A specific disposing form of the elastic piece3019is not limited in this application. For example, the elastic piece3019may include an elastic pad. There may be one or more elastic pads. When the elastic piece3019includes a plurality of elastic pads, the plurality of elastic pads may be disposed in a stacked manner. In addition, with reference toFIG.7, the elastic piece3019may be sleeved on the main shaft3018. In this embodiment, when the elastic piece3019is pressed, the elastic piece3019generates elastic force along the axial direction of the main shaft3018.

In addition, to prevent the elastic piece3019from falling off the main shaft3018, a limiting piece3020may be further disposed on a side that is of the elastic piece3019and that is away from the first fastening piece3012. For example, the limiting piece3020may be a nut. The limiting piece3020is sleeved on the main shaft3018. The elastic piece3019is limited along the axial direction of the main shaft3018. In addition, in this application, to apply effective force on the elastic piece3019, a group of gaskets3021may be further disposed. The group of gaskets3021are sleeved on the main shaft3018. The elastic piece3019is disposed between the group of gaskets3021. In addition, an outer ring diameter of the gasket3021may be further greater than or equal to an outer ring diameter of the elastic piece3019. The limiting piece3020may abut against a gasket3021located on a side that is of the elastic piece3019and that is away from the first fastening piece3012.

It should be noted that, in this application, the elastic piece3019may be deformed along the axial direction of the main shaft3018. Elastic force generated due to the deformation of the elastic piece3019may be applied on the first fastening piece3012, to generate friction force between the first fastening piece3012and the elastic piece3019. The friction force may hinder rotation of the main shaft3018. In addition, the second connection rod3017and the main shaft3018may rotate synchronously. The second connection rod3017can drive the connecting piece3011to rotate. The connecting piece3011is fixedly connected to the host support kit4fastened to the first support board2021shown inFIG.3b. Therefore, when the second connection rod3017is hindered as the main shaft3018rotates, movement of the first support board2021is hindered. In this way, the elastic force generated by the elastic piece3019is converted into damping force that hinders rotation of the rotating shaft mechanism.

It may be understood that the host1may be fastened to the first support board2021. When the host1reaches a specific rotation position in a rotation process of the first support board2021, if torque generated by gravity of the host1is equal to torque generated by the damping force of the rotating shaft mechanism, the first support board2021can hover in the corresponding rotation position without external force.

Because the rotating shaft mechanism requires different damping force in different rotation positions, a change of the damping force may be implemented through changing the elastic force generated by the elastic piece3019. The change of the elastic force of the elastic piece3019may be implemented through changing deformation of the elastic piece3019. In a possible embodiment of this application, in order that the elastic piece3019has corresponding deformation in different rotation positions, a cam contact surface may be disposed between the first fastening piece3012and the elastic piece3019. During specific implementation, still with reference toFIG.7, a first extrusion structure3022is disposed between the elastic piece3019and the first fastening piece3012. The first extrusion structure3022is sleeved on the main shaft3018. The elastic piece3019may press the first extrusion structure3022toward the first fastening piece3012, so that the first extrusion structure3022abuts against the first fastening piece3012under the elastic force of the elastic piece3019. In addition, in the radial direction of the main shaft3018, the first extrusion structure3022and the main shaft3018are fastened relative to each other, and the first extrusion structure3022may rotate synchronously with the main shaft3018. An irregular hole may be disposed on the first extrusion structure3022. For example, the irregular hole may be but is not limited to a D-shaped hole. In addition, a section of a part that is of the main shaft3018and that penetrates a first cam mechanism3022is also set to an irregular section that can match the irregular hole, to implement limiting of the first extrusion structure3022and the main shaft3018in the radial direction.

FIG.9is a schematic diagram of a structure of a first extrusion structure according to an embodiment of this application. A first slot30221is disposed on an end face that is of the first extrusion structure3022and that faces the first fastening piece3012. The first slot30221has a plurality of segments, for example, four segments shown inFIG.9. In addition, the first slot30221may be disposed in an arc shape. Radii of circles in which the plurality of segments of the first slot30221are located may be different. In order that the first extrusion structure3022cooperates with the end face of the first fastening piece3012, in this application, a first protrusion (not shown in the figure) may be disposed on an end face that is of the first fastening piece3012and that faces the first extrusion structure3022. The first protrusion also has a plurality of segments. The plurality of segments of the first protrusion are disposed in a one-to-one correspondence with the plurality of segments of the first slot30221. It may be understood that, in some other embodiments of this application, the first slot30221may also be disposed on an end face that is of the first fastening piece3012and that faces the first extrusion structure3022, and the first protrusion may be disposed on an end face that is of the first extrusion structure3022and that faces the second fastening piece.

When the correspondingly disposed first protrusion falls into the first slot30221so that the first slot30221cooperates with and is clamped to the first protrusion, a total length of the first extrusion structure3022and the first fastening piece3012in the axial direction of the main shaft3018is the smallest. In this case, extrusion force on the elastic piece3019is the smallest, and a deformation amount of the elastic piece3019is the smallest, so that the elastic force generated by the elastic piece3019is the smallest. Therefore, friction force between the first extrusion structure3022and the first fastening piece3012is the smallest. After the first extrusion structure3022rotates relative to the first fastening piece3012, when the first slot30221is misaligned with the first protrusion, a total length of the first extrusion structure3022and the first fastening piece3012in the axial direction of the main shaft3018increases, thereby increasing the deformation amount of the elastic piece3019to accumulate the elastic force. Under the elastic force, the friction force between the first extrusion structure3022and the first fastening piece3012increases, thereby increasing the damping force of the rotating shaft mechanism.

It should be noted that, in this application, through properly designing the first slot30221and the first protrusion, the damping force of the rotating shaft mechanism3is the largest when the corresponding keyboard assembly2is in the closed state, so that the keyboard assembly2can be stably kept in the closed state.

Still with reference toFIG.7, in this application, an elastic piece3023may be further disposed in the rotating assembly301. The elastic piece3023may be, for example, a torsion spring. In addition,FIG.10is a schematic diagram of a structure of the rotating assembly301corresponding toFIG.6bfrom another angle. It can be learned fromFIG.10that a hollow region30172may be disposed on the second connection rod3017, and the elastic piece3023can be hidden in the hollow region30172. In this embodiment, the elastic piece3023may be sleeved on the main shaft3018. In addition, because the main shaft3018can rotate relative to the first fastening piece3012and the second fastening piece3013, and the second connection rod3017can rotate synchronously with the main shaft3018, in this application, one end of the elastic piece3023may be fastened to the first fastening piece3012or the second fastening piece3013, and the other end of the elastic piece3023may be fastened to the second connection rod3017or the main shaft3018. In this way, in a process in which the second connection rod3017rotates with the main shaft3018, the elastic piece3023may generate elastic deformation, thereby generating elastic force in a direction around the main shaft. On this basis, through a proper design, the elastic force generated by the elastic piece3023can provide auxiliary force for rotation of the second connection rod3017and the main shaft3018. Therefore, when relatively small force is applied on the connecting piece3011shown inFIG.7, the second connection rod3017and the main shaft3018can be driven to rotate, to improve comfortableness of the user in performing an open operation or a close operation on the keyboard assembly2using the rotating assembly301.

Still with reference toFIG.7, the rotating assembly301may further include a third connection rod3024, and the third connection rod3024can slide along the second fastening piece3013. In addition, with reference toFIG.10, a slide30133is disposed on a side that is of the second fastening piece3013and that is away from the second open slot30131shown inFIG.7, and the third connection rod3024can be accommodated in the slide30133and can slide along the slide30133.

In some embodiments of this application, to prevent the third connection rod3024from falling off the slide30133, still with reference toFIG.7andFIG.10, the rotating assembly301may further include a fourth connection rod3025. At least a part of the fourth connection rod3025is located on a side that is of the third connection rod3024and that is away from the second open slot30131. The fourth connection rod3025is fixedly connected to the second fastening piece3013. Therefore, the third connection rod3024is limited in the slide30133by using the fourth connection rod3025, to improve movement reliability of the third connection rod3024.

In addition, in a rotation process of the rotating assembly301, to implement sliding of the third connection rod3024in the slide30133, it can be learned fromFIG.7that a side that is of the third connection rod3024and that faces the second fastening piece3013has a connecting portion30241. Because another structure of the rotating assembly301can rotate with the main shaft3018, in this application, the third connection rod3024can be connected to the main shaft3018through the connecting portion30241. During specific implementation, refer toFIG.11a.FIG.11ais a sectional view along B-B inFIG.10. It can be learned from the description of the foregoing embodiment that the stop portion30181is disposed on the side that is of the main shaft3018, that is located on the second fastening piece3013, and that is away from the first fastening piece3012. With reference to bothFIG.7andFIG.11a, a track slot301811may be disposed on an end face that is of the stop portion30181and that faces the third connection rod3024, and the connecting portion30241of the third connection rod3024can be inserted into the track slot301811. In this way, in the rotation process of the main shaft3018, the connecting portion30241of the third connection rod3024can slide along the track slot301811.

It may be understood that a movement trajectory of the third connection rod3024can be designed through properly designing the track slot301811. For example, when the rotating assembly301is in the opened state shown inFIG.11a, the third connection rod3024can be hidden in the second fastening piece3013. In addition, refer toFIG.11b.FIG.11bshows a relative position relationship between the third connection rod3024and the stop portion30181when the rotating assembly301is in the closed state. When the rotating assembly301is in the closed state shown inFIG.11b, the third connection rod3024may extend out of the second fastening piece3013. For example, when the rotating assembly301is used in the keyboard assembly2shown inFIG.3a, in the process in which the keyboard assembly2is switched from the opened state to the closed state, the third connection rod3024can slide in a direction toward the keyboard body201. On the contrary, in the process in which the keyboard assembly2is switched from the closed state to the opened state, the third connection rod3024can slide in a direction away from the keyboard body201. In some other embodiments of this application, when the rotating assembly301is used in the keyboard assembly2, in the process in which the keyboard assembly2is switched from the opened state to the closed state, the third connection rod3024may alternatively slide in a direction away from the keyboard body201. On the contrary, in the process in which the keyboard assembly2is switched from the closed state to the opened state, the third connection rod3024can slide in a direction toward the keyboard body201.

It can be learned from the description of the foregoing embodiment that the keyboard body201of the keyboard assembly2can be configured to implement a keyboard input function. Keys2012may be disposed on the keyboard body201.FIG.12is a schematic partial view of a structure of the keyboard body201according to a possible embodiment of this application. The keyboard body201may further include a keyboard cover2013. The keyboard cover2013can protect an internal structure of the keyboard body201. The keys2012can come out of the keyboard cover2013. Generally, the keys2012can protrude from a surface of the keyboard cover2013, to implement functions of the keys2012through hitting the keys2012. However, when the keyboard assembly2is in the closed state, the keys2012are in an unused state. In this case, the keys2012do not need to protrude from the surface of the keyboard cover2013. On this basis, this application provides a solution in which the keys2012on the keyboard body201can go up or down with rotation of the rotating shaft mechanism. Therefore, when the keyboard assembly2is in the opened state, the keys2012go up and protrude from the surface of the keyboard cover2013of the keyboard body201. However, when the keyboard assembly2is in the closed state, the keys2012go down and is hidden in the keyboard body201, to reduce a thickness of the keyboard assembly2in the closed state. In this way, a requirement of a thin design of the electronic device is met, and a trace on a display is avoided when the keyboard body201is attached to the display of the electronic device in the closed state, thereby improving use experience of the user.

During specific implementation,FIG.13ais a schematic diagram of an entire structure of the keyboard body201according to this application. Structures such as the keys2012and the key cover2013shown inFIG.12are omitted inFIG.13a, to display a connection relationship between the rotating shaft mechanism3and the keyboard body201. It can be learned fromFIG.13athat a rotating shaft connecting piece2014may be disposed at an end part that is of the keyboard body201and that is close to the rotating shaft mechanism3. The rotating shaft connecting piece2014may be but is not limited to be disposed in a long-strip structure. A length direction of the rotating shaft connecting piece2014may be the same as the axial direction of the main shaft3018of the rotating assembly301.

It can be learned from the description of the rotating assembly301of the rotating shaft mechanism3in the foregoing embodiment that the rotating assembly301includes the third connection rod3024that can slide along the direction toward or away from the keyboard body201. In this application, the rotating shaft connecting piece2014may be fixedly connected to the third connection rod3024, to drive, in the sliding process of the third connection rod3024, the rotating shaft connecting piece2014to move along a direction toward or away from the rotating shaft mechanism3. It may be understood that, in this application, when the third connection rod3024slides along the direction toward the keyboard body201, the rotating shaft connecting piece2014can be driven to move along the direction away from the rotating shaft mechanism3; and when the third connection rod3024slides along the direction away from the keyboard body201, the rotating shaft connecting piece2014can be driven to move along the direction toward the rotating shaft mechanism3.

It should be noted that, in this application, to improve movement stability of the rotating shaft connecting piece2014, a plurality of rotating assemblies301may be disposed in the rotating shaft mechanism3. For example, in the embodiment shown inFIG.13a, two rotating assemblies301may be disposed in the rotating shaft mechanism3, and the two rotating assemblies301may be disposed at two ends in a length direction of the rotating shaft mechanism3. In this way, third connection rods3024of the two rotating assemblies301may be both fixedly connected to the rotating shaft connecting piece2014, and the two third connection rods3024move synchronously in the same direction through proper disposition to drive the rotating shaft connecting piece2014to move, to improve movement reliability of the rotating shaft connecting piece2014and improve movement stability of the entire keyboard assembly2.

In addition, refer toFIG.13b.FIG.13bis a schematic diagram of a structure of the keyboard body shown inFIG.13afrom another angle. The keyboard body201may further include a frame assembly2015. The frame assembly2015includes a first frame20151, a second frame20152, and a horizontal rod20153. In the axial direction of the main shaft3018of the rotating assembly301of the rotating shaft mechanism3, the first frame20151and the second frame20152are disposed relative to each other, and the first frame20151and the second frame20152are both fixedly connected to the rotating shaft connecting piece2014. A connection manner may be but is not limited to a tight connection by using a fastener such as a screw. In this way, when the rotating shaft connecting piece2014moves with the third connection rod3024, the first frame20151and the second frame20152may be driven to move synchronously with the rotating shaft connecting piece2014.

FIG.14is a schematic partial view of a structure obtained after the keyboard cover2013of the keyboard body201shown inFIG.12is removed. It can be learned fromFIG.14that the keys2012are located between the first frame20151and the second frame20152. In addition, in this application, the keys2012may be in a plurality of rows disposed in parallel. Each row of the keys2012includes a plurality of keys2012. Each row of the keys2012are arranged in a direction from the first frame20151to the second frame20152.

FIG.15is a schematic diagram of a structure of the keyboard body201shown inFIG.14from another angle. In this embodiment, there are a plurality of horizontal rods20153. One horizontal rod20153is correspondingly disposed for each row of the keys2012. A length direction of the horizontal rod20153is the same as the arrangement direction of each row of the keys2012. In addition, the horizontal rod20153may be disposed on a side that is of correspondingly disposed keys2012and that faces the rotating shaft mechanism3shown inFIG.13a, or may be disposed on a side that is of correspondingly disposed keys2012and that is away from the rotating shaft mechanism3. This is not specifically limited in this application.

In this application, the first frame20151and the second frame20152can drive the horizontal rod20153to move in the length direction of the horizontal rod20153. During specific implementation, refer toFIG.16.FIG.16is an enlarged view of a partial structure of the keyboard body201shown inFIG.15. In this application, the first frame20151includes a first inner frame201511and a first outer frame201512, the first inner frame201511and the first outer frame201512are disposed side by side, and the first inner frame201511is located on a side that is of the first outer frame201512and that faces the keys2012. In addition, the first outer frame201512is configured to fixedly connect to the rotating shaft connecting rod2014shown inFIG.13a, and the first inner frame201511is fixedly connected to the plurality of horizontal rods20153. A connection manner may be but is not limited to a tight connection by using a fastener such as a screw. The first outer frame201512and the first inner frame201511may be connected through the first connecting rod assembly2016.

FIG.17is a locally enlarged view of a structure of a C part inFIG.16. In this application, the first connecting rod assembly2016includes a first connecting rod20161and a second connecting rod20162. A first end201611of the first connecting rod20161is hinged to the first inner frame201511, and a second end201612of the first connecting rod20161is hinged to the first outer frame201512. The first connecting rod20161may be but is not limited to be hinged to the first inner frame201511and the first outer frame201512through a pin shaft. A first end201621of the second connecting rod20162is hinged to a rod body of the first connecting rod20161. The rod body of the first connecting rod20161is a part that is located between the first end201611and the second end201612. The second end201622of the second connecting rod20162may be hinged to another mechanical part of the keyboard body201. It should be noted that the another mechanical part of the keyboard body201may be any mechanical part in a fixed position on the keyboard body201. In this application, the mechanical part in the fixed position is a mechanical part whose position does not change regardless of a working status of the keyboard assembly. For example, the keyboard cover2013shown inFIG.12is a structure that is in a fixed position on the keyboard body201. Similarly, the second connecting rod20162may be but is not limited to be connected to the first connecting rod20161and the mechanical part of the keyboard body201through a pin shaft. In addition, in a possible embodiment of this application, the second end201622of the second connecting rod20162may be located on a side that is of the first end201621and that is away from the first inner frame201511.

Still with reference toFIG.16, in this application, the second frame20152may include a second inner frame201521and a second outer frame201522, the second inner frame201521and the second outer frame201522are disposed side by side, and the second inner frame201521is located on a side that is of the second outer frame201522and that faces the keys2012. In addition, the second outer frame201522is configured to fixedly connect to the rotating shaft connecting rod2014shown inFIG.13a, and the second inner frame201521is fixedly connected to the plurality of horizontal rods20153. A connection manner may be but is not limited to a tight connection by using a fastener such as a screw. The second outer frame201522and the second inner frame201521may be connected through a second connecting rod assembly2017. The second connecting rod assembly2017includes a third connecting rod and a fourth connecting rod. In this application, a first end of the third connecting rod is hinged to the second inner frame201521, and a second end of the third connecting rod is hinged to the second outer frame201522. This is similar to a case of the first frame20151. The third connecting rod may be but is not limited to be hinged to the second inner frame201521and the second outer frame201522through a pin shaft. A first end of the fourth connecting rod is hinged to a rod body of the third connecting rod, and a second end of the fourth connecting rod may be hinged to another mechanical part of the keyboard body201. For example, the second end may be hinged to the keyboard cover2013. Similarly, the fourth connecting rod may be but is not limited to be connected to the third connecting rod and the mechanical part of the keyboard body201through a pin shaft. In addition, in a possible embodiment of this application, the second end of the fourth connecting rod may be located on a side that is of the first end and that is away from the second inner frame201521.

Still with reference toFIG.17, inFIG.17, a coordinate system including an X axis and a Y axis is used to indicate movement directions of the first frame20151and the horizontal rod20153. A positive direction of the Y axis points to the rotating shaft mechanism (not shown inFIG.17, where reference may be made toFIG.13a), and a positive direction of the X axis points to the second frame (not shown inFIG.17, where reference may be made toFIG.16). In addition, in this application, the positive direction of the X axis may be the same as or opposite to the arrangement direction of each row of the keys2012. A process in which the first frame20151drives the horizontal rod20153to move is described by using an example in which the keyboard assembly2shown inFIG.17is in the opened state.

When the keyboard assembly2is changed from the opened state shown inFIG.17to the closed state, the rotating shaft mechanism3drives the first outer frame201512to move toward the positive direction of the Y axis, and the second end201612of the first connecting rod20161moves toward the positive direction of the Y axis accordingly. Because the second end201622of the second connecting rod20162is located in the positive direction of the Y axis of the first connecting rod20161, the second end201612of the first connecting rod20161moves along the positive direction of the Y axis. To be specific, the second end201612of the first connecting rod20161moves toward the second end201622of the second connecting rod20162. In addition, the second end201622of the second connecting rod20162is fixedly connected to the structure of the keyboard body201. The second end201622of the second connecting rod20162is always in a fixed position, and the second connecting rod20162can rotate only around the second end201622.

FIG.18shows a relative position relationship between the first connecting rod20161and the second connecting rod20162when the keyboard assembly2is in the closed state. It can be learned through comparison betweenFIG.17andFIG.18that, in the process in which the keyboard assembly2is changed from the opened state shown inFIG.17to the closed state shown inFIG.18, an included angle between the first connecting rod20161and the second connecting rod20162in the X-axis direction decreases, and the first end201611of the first connecting rod20161and the first end201621of the second connecting rod20162both move along the positive direction of the X axis, to push the first inner frame201511to move along the positive direction of the X axis. Each horizontal rod20153driven by the first inner frame201511moves along a direction toward the second frame20152.

It may be understood that, in the foregoing process, an included angle between the third connecting rod and the fourth connecting rod in the X-axis direction increases, and the first end of the third connecting rod and the first end of the fourth connecting rod both move along the positive direction of the X axis, to drive the second inner frame201521to move along the positive direction of the X axis. Each horizontal rod20153driven by the second inner frame201521moves along a direction away from the first frame20151.

In addition, when the keyboard assembly2is changed from the closed state shown inFIG.18to the opened state shown inFIG.17, each horizontal rod20153driven by the first inner frame201511and the second inner frame201521moves along a negative direction of the X axis.

In this application, in a change process of the keyboard assembly2, the first outer frame201512and the second outer frame201522may move in a direction toward or away from the rotating shaft mechanism, to drive the first inner frame201511and the second inner frame201521to move in a same direction along the arrangement direction of each row of the keys2012, so that the horizontal rod20153can move back and forth along the arrangement direction of each row of the keys2012accordingly. Further, each horizontal rod20153is correspondingly disposed for one row of the keys2012. On this basis, to implement up and down of the keys2012in different folding statuses of the keyboard assembly2, an extrusion mechanism may be disposed between the horizontal rod20153and the corresponding keys2012, so that the keys2012go up or down after being pressed and pushed by back-and-forth movement of the horizontal rod20153.

During specific implementation, refer toFIG.19.FIG.19is an enlarged diagram of a partial structure of the horizontal rod20153according to a possible embodiment of this application. First abutting structures201531may be disposed on the horizontal rod20153. There may be a plurality of first abutting structures201531. The first abutting structures201531may be disposed based on a quantity of keys2012correspondingly disposed for the horizontal rod20153. In this embodiment of this application, the first abutting structure201531may be provided with a first inclined face2015311. In addition, tilt angles of first inclined faces2015311of the plurality of first abutting structures201531may be the same or may be different.

In addition, refer toFIG.20.FIG.20is a schematic diagram of a structure of installing the horizontal rod20153on the keyboard body201. The keyboard body201has a plurality of key slots2018. At least one first abutting structure201531can be correspondingly accommodated in each key slot2018. For example, as shown inFIG.20, two first abutting structures201531may be accommodated in each key slot2018.

In this application, the key2012may include a key cap20121and an up and down mechanism. The key cap20121covers and is fastened to the up and down mechanism, to protect the up and down mechanism. In addition, the key cap20121can serve as a force-bearing component of the key2012, and an input function of the keyboard assembly2can be implemented through pressing the up and down mechanism down by applying force on the key cap20121. The up and down mechanism can drive the key cap20121to go up after the force applied on the key cap20121is removed.FIG.21is a schematic diagram of a structure of the up and down mechanism20122according to a possible embodiment of this application. The up and down mechanism20122can be accommodated in the key slot2018shown inFIG.20. Second abutting structures201221are disposed in the up and down mechanism20122. The second abutting structure201221may be provided with a second inclined face2012211. In addition, each up and down mechanism20122may have a plurality of second abutting structures201221. For example, as shown inFIG.21, two second abutting structures201221may be disposed on each up and down mechanism20122. When each up and down mechanism20122has the plurality of second abutting structures201221, tilt directions of second inclined faces2012211of the plurality of second abutting structures201221may be the same or may be different.

FIG.22shows a cooperation relationship between the horizontal rod20153and the key2012when the keyboard assembly2is in the opened state. In the embodiment shown inFIG.22, the key cap is omitted for ease of expressing cooperation between the horizontal rod20153and the key2012. In addition, in comparison withFIG.17, a view angle of the keyboard assembly2inFIG.22is adjusted. However, directions of the Y axis and the X axis inFIG.22are the same as those inFIG.17.

As shown inFIG.22, in this application, for the horizontal rod20153and the key2012that are correspondingly disposed, the first inclined face2015311of the first abutting structure201531of the horizontal rod20153shown inFIG.19and the second inclined face2012211of the second abutting structure201221of the up and down mechanism20122shown inFIG.21may be disposed relative to each other. The first abutting structure and the second abutting structure are located in the same key slot2018. The second inclined face2012211is in the positive direction of the X axis relative to the first inclined face2015311. In addition, in the state shown inFIG.22, the first inclined face2015311and the second inclined face2012211that are disposed relative to each other may be spaced; or the first inclined face2015311and the second inclined face2012211are in contact with no extrusion force or small extrusion force therebetween. In this case, when the up and down mechanism20122is in an up state, the entire key2012may protrude from the surface of the keyboard cover2013shown inFIG.12, to implement the input function of the keyboard assembly2through hitting the key2012.

It can be learned from the description of the foregoing embodiment that, when the keyboard assembly2is changed from the opened state shown inFIG.22to the closed state, the horizontal rod20153can move along the positive direction of the X axis, and the second inclined face2012211of the second abutting structure201221is in the positive direction of the X axis relative to the first inclined face2015311of the first abutting structure201531. Therefore, when the horizontal rod20153moves along the positive direction of the X axis, the first inclined face2015311may be used to apply extrusion force on the second inclined face2012211.FIG.23shows a cooperation relationship between the horizontal rod20153and the key2012when the keyboard assembly2is in the closed state. It can be learned fromFIG.23that, when the keyboard assembly2is in the closed state, the up and down structure20122drives the key cap to go down under the extrusion force applied on the second inclined face2012211through the first inclined face2015311, so that the key2012can be hidden in the corresponding key slot2018. Therefore, the thickness of the keyboard assembly2in the closed state is small. In this way, the requirement of the thin design of the electronic device is met, to improve use experience of the user.

In addition, when the keyboard assembly2is changed from the closed state to the opened state, the horizontal rod20153moves along the negative direction of the X axis, and the extrusion force applied on the second inclined face2012211through the first inclined face2015311becomes increasingly smaller. The up and down mechanism20122can drive the key cap20121to go up from the corresponding key slot2018, and enable the key cap20121to protrude from the surface of the keyboard cover2013shown inFIG.12, to implement functions of the key2012.

It should be noted that the solution in which the key2012goes up or down according to the folding status of the keyboard assembly2provided in this application can be applied to the keyboard assembly2in this application, and can also be applied to another foldable electronic device having a keyboard. For example, the solution can be applied to a notebook computer. For a specific setting manner, refer to the foregoing embodiment of this application. Details are not described herein again.

It can be learned from the description of the foregoing embodiment that, with reference toFIG.2, the support portion202of the keyboard assembly2may be configured to support the host1installed on the first support board2021. Therefore, in the processes in which the keyboard assembly2is changed from the closed state to the opened state and from the opened state to the closed state, a relatively high requirement is imposed on movement stability of the support portion202.

On this basis, refer toFIG.24.FIG.24is a schematic diagram of a structure of the rotating shaft mechanism3according to another possible embodiment of this application. In this embodiment, the rotating shaft mechanism3may further include a cam303. The cam303can rotate synchronously with the main shaft3018of the rotating assembly301. In other words, in the radial direction of the main shaft3018, the cam303and the main shaft3018are fastened relative to each other. An irregular hole may be disposed on the cam303. For example, the irregular hole may be but is not limited to a D-shaped hole. In addition, a section of a part that is of the main shaft3018and that penetrates the cam303is also set to an irregular section that can match the irregular hole, to implement limiting of the cam303and the main shaft3018in the radial direction.

Still with reference toFIG.24, a cam sliding slot3031is disposed on a surface of the cam303. In addition, refer toFIG.25a.FIG.25ais a schematic partial view of a structure of the keyboard assembly2in the closed state according to an embodiment of this application.FIG.25ashows a structure of the fourth support board2024of the support portion202in the closed state. An auxiliary support mechanism20241is disposed on the fourth support board2024. The auxiliary support mechanism20241includes a first support rod202411and a second support rod202412. The first support rod202411and the second support rod202412are disposed in a cross manner. Middle parts of the first support rod202411and the second support rod202412are hinged.

In addition, a slide20242and a slide20243are disposed on the fourth support board2024. The slide20242and the slide20243can extend in directions away from the keyboard body201. A first sliding block20244is disposed in the slide20242. A second sliding block20245is disposed in the slide20243. Still with reference toFIG.25a, in this application, the first sliding block20244and the second sliding block20245can be both fixedly connected to the fourth support board2024.

It can be learned from the description of the foregoing embodiment that, in order that the rotating shaft mechanism3relatively stably moves, one rotating assembly301may be disposed at each of the two end parts of the rotating shaft mechanism3in the length direction. In addition, in this application, one cam303can be correspondingly disposed for each rotating assembly301.

In this way, the auxiliary support structure may be located between the two rotating assemblies301. One end of the first support rod202411can be accommodated in a cam sliding slot3031of one cam303, and the other end of the first support rod202411is hinged to the first sliding block20244. One end of the second support rod202412is accommodated in a cam sliding slot3031of the other cam303, and the other end of the second support rod202412is hinged to the second sliding block20245.FIG.25bshows a structure of the fourth support board2024of the support portion202shown inFIG.25awhen the keyboard assembly2is in the opened state. With reference to bothFIG.25aandFIG.25b, in the process from the closed state shown inFIG.25ato the opened state shown inFIG.25b, the cam303can rotate with the main shaft3018of the rotating assembly301. In this way, the end that is of the first support rod202411and that is accommodated in the corresponding cam sliding slot3031and the end that is of the second support rod202412and that is accommodated in the corresponding cam sliding slot3031are pushed to move toward each other along the axial direction of the main shaft3018. Because the first support rod202411is hinged to the second support rod202412, in the foregoing process, the first support rod202411can push the first sliding block20244to slide along the slide20243in a direction away from the keyboard body201, and the second support rod202412can push the second sliding block20245to slide along the slide20242in a direction away from the keyboard body201. In addition, because the first sliding block20244and the second sliding block20245are both fixedly connected to the fourth support board2024, in a process in which the first sliding block20244and the second sliding block20245slide in the directions away from the keyboard body201, the fourth support board2024can be pushed to slide in a direction away from the keyboard body201. In this way, movement stability of the support portion202can be improved in the process of opening the keyboard assembly2, so that the keyboard assembly2can stably support the host1disposed on the first support board2021, thereby improving user experience.

It may be understood that, in this application, a track shape of the cam sliding slot3031may be designed based on the first support rod202411, the second support rod202412, and movement directions of the first sliding block20244and the second sliding block20245. Therefore, the first sliding block20244and the second sliding block20245can be pushed to stably slide in a process in which the first support rod202411and the second support rod202412rotate around a hinge joint of the first support rod202411and the second support rod202412.

In addition to the foregoing structure, the rotating shaft mechanism3provided in this application may be further provided with an automatic opening and closing apparatus304. The automatic opening and closing apparatus304may include a motor3041. When the rotating shaft mechanism3is used in the keyboard assembly2, the motor3041can be used to drive the rotating shaft mechanism3to move, to open or close the keyboard assembly2, thereby simplifying operation steps of the user.

In addition, the user has a personalized requirement for a use angle of a foldable device. In a process in which the motor3041is used to drive the keyboard assembly2to be opened or closed, the process may be subconsciously intervened according to a requirement of the user. If torque provided by the motor3041is insufficient, the motor3041or another mechanical part is damaged. To resolve this problem, the motor3041can safely and reliably run. A protection mechanism3042may be further disposed on the automatic opening and closing apparatus304provided in this application.

During specific implementation, refer toFIG.26.FIG.26is a schematic diagram of a structure of the rotating shaft mechanism3according to an embodiment of this application. In this embodiment of this application, in addition to the rotating assembly301, the rotating shaft mechanism3further includes the automatic opening and closing apparatus304. The automatic opening and closing apparatus304includes the motor3041and the protection mechanism3042. The protection mechanism3042may be but is not limited to a clutch. The protection mechanism3042is located between the motor3041and the rotating assembly301. The motor3041may be used to drive the rotating shaft mechanism3to rotate, to implement an automatic opening and closing function of the keyboard assembly. The protection mechanism3042can protect the motor3041. In a normal working state, the motor3041transmits the torque to the rotating assembly301through the protection mechanism3042, to drive the rotating assembly301to rotate. When a load on the motor3041is excessively large, the protection mechanism3042can adjust the load on the motor3041, to avoid damage to the motor.

FIG.27is a schematic diagram of a structure of the protection mechanism3042according to an embodiment of this application. The protection mechanism3042includes a fastening frame30421. The fastening frame30421may serve as a support base of the entire protection mechanism3042, to support another structure of the protection mechanism3042. In addition, a first fastening plate304211and a second fastening plate304212may be disposed on the fastening frame30421. The first fastening plate304211and the second fastening plate304212are disposed relative to each other, to form installation space between the first fastening plate304211and the second fastening plate304212.

FIG.28is an exploded view of the protection mechanism3042shown inFIG.27. In this application, the fastening frame30421may be fixedly connected to the keyboard body201in the foregoing embodiment. A connection manner may be but is not limited to a threaded connection.

Still with reference toFIG.28, the protection mechanism3042further includes two rotating shaft assemblies. For ease of description, the two rotating shafts may be respectively denoted as a first rotating shaft assembly30422and a second rotating shaft assembly30423. The first rotating shaft assembly30422and the second rotating shaft assembly30423are accommodated in the installation space between the first fastening plate304211and the second fastening plate304212. The first rotating shaft assembly30422includes a first shaft304221. The second rotating shaft assembly30423includes a second shaft304231. Axes of the first shaft304221and the second shaft304231may be set in parallel. One end of the first shaft304221is fastened to the first fastening plate304211, and the other end of the first shaft is fastened to the second fastening plate304212. One end of the second shaft304231is fastened to the first fastening plate304211, and the other end of the second shaft extends toward the second fastening plate304212.

In addition, the first rotating shaft assembly30422further includes a first gear piece304222. The first gear piece304222is sleeved on the first shaft304221. The first gear piece304222can rotate around the first shaft304221, and can slide along an axial direction of the first shaft304221. In a direction from the first fastening plate304211to the second fastening plate304212, a first gear structure3042221and a second gear structure3042222are disposed on the first gear piece304222, and the first gear structure3042221and the second gear structure3042222are spaced. Still with reference toFIG.28, a guide slot structure3042223is further disposed on the first gear piece304222, and the guide slot structure3042223is located between the first gear structure3042221and the first fastening plate304211. A guide slot30422231is disposed on the guide slot structure3042223. The guide slot30422231may be but is not limited to be disposed in a spiral shape.

When the second rotating shaft assembly30423is disposed, a second gear piece304232is further disposed on the second rotating shaft assembly30423. The second gear piece304232can be sleeved on the second shaft304231, and can rotate around the second shaft304231. Still with reference toFIG.28, a third gear structure3042321may be disposed on the second gear piece304232. The third gear structure3042321can be engaged with the first gear structure3042221.

A first stopper3042322may be further disposed on an end that is of the second gear piece304232and that faces the first fastening plate304211. A notch30423221may be disposed on the first stopper3042322. In addition, the second rotating shaft assembly30423may further include a fast pin304233and a sliding pin304234. The fast pin304233and the sliding pin304234are located on a side that is of the second gear piece304232and that faces the first fastening plate304211. Still with reference toFIG.28, the fast pin304233is sleeved on the second shaft304231, and the fast pin304233may be rotatively connected to the second shaft304231. In addition, the fast pin304233may extend out of the installation space from the first fastening plate304211, to fixedly connect to the main shaft of the rotating assembly in the foregoing embodiment.

In this application, to connect the fast pin304233to the rotating shaft of the rotating assembly, the protection mechanism3042may further include a conversion bracket30424. The conversion bracket30424may be disposed on a side that is of the first fastening plate304211and that is away from the second fastening plate304212. An end that is of the fast pin304233and that extends out of the installation space from the first fastening plate304211may be fixedly connected to the conversion bracket30424. The conversion bracket30424can rotate synchronously with the main shaft of the rotating assembly shown inFIG.26.

With reference toFIG.28, a mounting hole304241is disposed on the conversion bracket30424. The main shaft3018(refer toFIG.7) of the rotating assembly301may be installed in the mounting hole304241. The conversion bracket30424can rotate synchronously with the main shaft3018. It may be understood from the description of the foregoing embodiment that, in this application, a section of a part that is of the main shaft3018and that is installed in the mounting hole304241may be an irregular section, for example, a D-shaped section. In this case, the mounting hole304241of the conversion bracket30424may also be disposed as an irregular hole that cooperates with the section of the main shaft, for example, a D-shaped hole.

FIG.29ais a D-direction view of the protection mechanism3042shown inFIG.27. In this application, the fast pin304233is provided with an open slot3042331. An opening of the open slot3042331is located at an end that is of the fast pin304233and that is away from the first fastening plate304211. The open slot3042331extends in a direction toward the first fastening plate304211. In this application, a guide structure3042332may be further disposed on a surface of the fast pin304233. The guide structure3042332may be a protrusion structure. The guide structure3042332can be inserted into the guide slot30422231of the guide slot structure3042223of the first gear piece304222, and can slide along the guide slot30422231.

In this application, in a process in which the guide structure3042332slides in the guide slot30422231, the first gear piece304222can be pushed to slide along the first rotating shaft. Still with reference toFIG.28, in a possible embodiment of this application, an assisting mechanism304223may be further disposed on the first rotating shaft assembly30422. The assisting mechanism304223can provide assistance for sliding of the first gear piece304222along the first shaft304221, to improve sliding reliability of the first gear piece304222. In this application, a specific manner of disposing the assisting mechanism304223is not limited. For example, the assisting mechanism304223may be a torsion spring. One end of the assisting mechanism304223may be fixedly connected to the first gear piece304222, and the other end of the assisting mechanism may be fixedly connected to the first shaft304221. Through properly designing a shape of the torsion spring, in a process in which the first gear piece304222slides along the first shaft304221, elastic force generated by deformation of the torsion spring drives the first gear piece304222and the first shaft304221to slide relative to each other.

With reference toFIG.29a, the sliding pin304234is located between the fast pin304233and the first stopper3042322. The sliding pin304234is sleeved on the second shaft304231shown inFIG.28, and can slide along an axial direction of the second shaft304231. In this application, a pin shaft3042341is disposed at an end that is of the sliding pin304234and that faces the fast pin304233. The pin shaft3042341can be inserted into the open slot3042331of the fast pin304233, and can slide along the open slot3042331.

It may be understood that, in this application, there may be one or more open slots3042331on the fast pin304233. The pin shaft3042341disposed on the sliding pin304234can be correspondingly disposed in the open slot3042331, to improve sliding stability of the sliding pin304234along the open slot3042331of the fast pin304233.

In addition, still with reference toFIG.29a, a second stopper3042342is further disposed at an end that is of the sliding pin304234and that is away from the fast pin304233. The second stopper3042342may be a protrusion structure. When the sliding pin304234slides in a direction away from the first fastening plate304211, the second stopper3042342may be inserted into the notch30423221of the first stopper3042322, so that the sliding pin304234and the second gear piece304232are locked relative to each other. Because the pin shaft3042341of the sliding pin304234is always located in the open slot3042331of the fast pin304233, and the fast pin304233is fixedly connected to the main shaft of the rotating assembly, when the second stopper3042342is inserted into the notch30423221of the first stopper3042322, the second gear piece304232can rotate synchronously with the fast pin304233.

Still with reference toFIG.29a, a first clamping portion (not shown inFIG.29a) may be further disposed on a side that is of the sliding pin304234and that faces the first gear piece304222, and a second clamping portion (not shown inFIG.28) may be further disposed on the first gear piece304222. The first clamping portion may be clamped to the second clamping portion. Therefore, when the first gear piece304222slides along the first shaft304221, the sliding pin304234can be pushed to slide along the second shaft304231in a direction opposite to a direction of the first gear piece304222. In this application, specific structures of the first clamping portion and the second clamping portion are not limited. For example, the first clamping portion may be a protrusion. A shape of the first clamping portion may be but is not limited to a trapezoid. In addition, the second clamping portion may be a slot, and the protrusion is clamped into the slot, to implement clamping between the first clamping portion and the second clamping portion. In some other embodiments of this application, the first clamping portion may be alternatively a slot, and the second clamping portion may be a protrusion.

Still with reference toFIG.29a, a motor connecting piece304235may be further disposed at an end that is of the second shaft304231and that faces the second fastening plate304212. The motor connecting piece304235may be configured to fixedly connect to a rotating shaft of the motor. In addition, the second rotating shaft assembly30423may further include a conversion bracket30425. The conversion bracket30425is located between the second rotating shaft assembly30423and the second fastening plate304212. The conversion bracket30425abuts against the second rotating shaft assembly30423. In this application, the conversion bracket30425can be sleeved on the second shaft. The conversion bracket30425may be connected to the motor connecting piece304235. The conversion bracket30425can rotate with the motor connecting piece304235.

As shown inFIG.29a, a fourth gear structure304251may be disposed on a surface of the conversion bracket30425, and the second gear structure3042222of the first gear piece304222is engaged with the fourth gear structure304251. In this application,FIG.29ais a schematic diagram of a structure of the protection mechanism3042when the keyboard assembly is in the closed state.FIG.29bis an E-direction view ofFIG.29a.FIG.29bshows a structure on a side of the conversion bracket30424in the closed state. In the closed state, the first gear structure3042221and the third gear structure3042321are engaged, and the second gear structure3042222and the fourth gear structure304251are engaged. In addition, the guide structure3042332on the fast pin304233is inserted into the guide slot30422231of the guide slot structure3042223.

In a process in which the keyboard assembly is changed from the closed state to the opened state, the motor3041shown inFIG.26runs and drives, by using the motor connecting piece304235, the conversion bracket30425to rotate. Because the second gear structure3042222of the first gear piece304222is engaged with the fourth gear structure304251of the conversion bracket30425, rotation of the conversion bracket30425can drive the first gear piece304222to rotate. In addition, because the first gear structure3042221of the first gear piece304222is engaged with the third gear structure of the second gear piece304232, rotation of the first gear piece304222can drive the second gear piece304232to rotate.

With reference toFIG.29a, in the closed state, the second stopper3042342of the sliding pin304234is inserted into the notch30423221of the first stopper3042322of the second gear piece304232, and the pin shaft3042341of the sliding pin304234is inserted into the open slot3042331of the fast pin304233. In this way, in a process in which the keyboard assembly is changed from the closed state to the opened state, rotation of the first gear piece304222can drive the second gear piece304232to rotate, and rotation of the second gear piece304232can drive the sliding pin304234and the fast pin304233to rotate accordingly. The fast pin304233is further connected to the main shaft of the rotating assembly through the conversion bracket30424, to drive the main shaft of the rotating assembly to rotate with the fast pin304233.

In addition, in a rotation process of the first gear piece304222, the guide structure3042332of the fast pin304233can slide along the guide slot30422231of the guide slot structure3042223, and the guide slot30422231of the guide slot structure3042223interacts with the guide structure3042332of the fast pin304233. In this case, through a proper design, in a process in which the guide structure3042332of the fast pin304233slides along the guide slot30422231of the guide slot structure3042223, the first gear piece304222is pushed to slide along the first shaft304221in a direction toward the second fastening plate304212. It can also be learned from the description of the foregoing embodiment that the sliding pin304234can slide synchronously with the first gear piece304222. In a process in which the first gear piece304222slides along the first shaft304221in the direction toward the second fastening plate304212, the sliding pin304234can be pushed to slide along the second shaft304231in a direction toward the first fastening plate304211.

FIG.30ais a schematic diagram of a structure of the protection mechanism3042when the keyboard assembly is in the opened state.FIG.30bis an F-direction view ofFIG.30a.FIG.30bshows a structure on a side of the conversion bracket30424in the closed state. When the keyboard assembly is in the opened state, the first gear structure3042221and the third gear structure3042321are staggered, to break an engagement relationship between the first gear piece304222and the second gear piece304232. However, in this case, the second gear structure3042222and the fourth gear structure304251are still in an engaged state. In addition, in this case, the second stopper3042342of the sliding pin304234is detached from the notch30423221of the first stopper3042322of the second gear piece304232shown inFIG.28. There is no connection relationship between the sliding pin304234and the second gear piece304232.

It may be understood that closing of the keyboard assembly may be usually implemented by using a user operation. During specific implementation, the user may apply, on the first support board of the support portion of the keyboard assembly, force in a direction toward the keyboard body. It can be learned from the description of the foregoing embodiment that, in the process in which the keyboard assembly is changed from the opened state to the closed state, movement of the first support board toward the keyboard body can drive the main shaft of the rotating assembly to rotate. With reference to bothFIG.29aandFIG.30a, the process in which the keyboard assembly is changed from the opened state to the closed state is a process in which the protection mechanism moves from the state shown inFIG.30ato the state shown inFIG.29a. Because the main shaft of the rotating assembly can rotate synchronously with the conversion bracket30424, in this process, the first gear piece304222slides along the first shaft304221in a direction toward the first fastening plate304211under cooperation between the guide structure3042332of the fast pin304233and the guide slot30422231, so that the gear structures corresponding to the first gear piece304222and the second gear piece304232are engaged again. In addition, in a process in which the first gear piece304222slides in the direction toward the first fastening plate304211, the sliding pin304234can be driven to slide in a direction toward the second fastening plate304212, so that the second stopper3042342of the sliding pin304234is inserted into the notch30423221of the first stopper3042322of the second gear piece304232again.

After a structure and an operating principle of the protection mechanism3042provided in this application are understood, the following describes an implementation in which the protection mechanism3042protects the motor3041shown inFIG.26.

FIG.31is a sectional view of the protection mechanism3042according to an embodiment of this application. For ease of description,FIG.31shows only a sectional structure at the second rotating shaft assembly30423, and omits a sectional structure at the first rotating shaft assembly30422.

With reference toFIG.31, the conversion bracket30425is provided with an accommodating cavity304252, and an opening of the accommodating cavity304252faces the motor connecting piece304235. The motor connecting piece304235includes a rotation center piece3042351. The rotation center piece3042351can be inserted into the accommodating cavity304252. Still with reference toFIG.31, in this application, the second shaft304231can be inserted into the rotation center piece3042351. In addition, an end that is of the rotation center piece3042351and that is away from the conversion bracket30425can penetrate the second fastening plate304212, to connect to the motor.

In addition, the motor connecting piece304235may further include a housing3042352. The housing3042352is sleeved on the rotation center piece3042351. The housing3042352may be fixed on the second fastening plate304212. It can be learned fromFIG.31that, in a possible embodiment of this application, a roll ball may be disposed between the housing3042352and the rotation center piece3042351. There may be a plurality of roll balls. The housing3042352and the rotation center piece3042351both abut against the roll ball. In this case, friction force between the housing3042352and the rotation center piece3042351is rolling friction force, to reduce a risk that the housing and the rotation center piece are damaged, thereby prolonging a service life of the housing and the rotation center piece.

Still with reference toFIG.31, an elastic piece304253is further disposed on the conversion bracket30425. The elastic piece304253is accommodated in the accommodating cavity304252. The elastic piece304253is sleeved on the rotation center piece3042351of the motor connecting piece304235. In this application, a specific disposing form of the elastic piece304253is not limited. For example, the elastic piece304253may include a plurality of spring plates that are stacked. In addition, deformation of the elastic piece304253may form elastic force between the conversion bracket30425and the rotation center piece3042351.

A rolling piece304254may be further disposed on the conversion bracket30425. The rolling piece304254is accommodated in the accommodating cavity304252. In addition, a slot is further disposed on a bottom wall of the accommodating cavity304252of the conversion bracket30425. The rolling piece304254can be accommodated in the slot. One end of the elastic piece304253presses the rolling piece304254toward the bottom wall of the accommodating cavity304252, and the other end of the elastic piece abuts against the rotation center piece3042351. In this application, a specific disposing form of the rolling piece304254is not limited. For example, the rolling piece304254may be a roll ball or a roll pillar. In addition, there may be one or more rolling pieces304254. The rolling pieces304254can be accommodated in corresponding slots in a one-to-one correspondence.

Still with reference toFIG.31, a press block304255may be further disposed between the elastic piece304253and the rolling piece304254, and the elastic piece304253presses the rolling piece304254toward the corresponding slot through the press block304255. An arc-shaped slot is disposed on a surface that is of the press block304255and that is used to be in contact with the rolling piece304254. At least a part of the rolling piece304254can be accommodated in the arc-shaped slot, to prevent the rolling piece304254from falling off in a movement process.

In this application, a gasket304236is further disposed between the sliding pin304234and the second gear piece304232. A material of the gasket304236may be but is not limited to polyformaldehyde (polyformaldehyde, POM). The sliding pin304234and the second gear piece304232both abut against the gasket304236, to generate torque in a process in which the second gear piece304232and the sliding pin304234rotate relative to each other. In addition, abrasion of the second gear piece and the sliding pin can be reduced, to improve structure reliability.

It may be understood that, when the keyboard assembly is in the opened state, if the keyboard assembly is manually closed, because the sliding pin304234can rotate with the fast pin304233, rotating friction force may be generated between the sliding pin304234and the second gear piece304232. The friction force can generate different torque when the keyboard assembly is in different states, to provide different hand feel experience for a consumer.

In addition, according to the rotating shaft mechanism provided in this application, in a process in which the motor is used to drive the keyboard assembly to be opened or closed, if torque brought by the conversion bracket30425to the motor connecting piece304235exceeds a specified value (that is, the motor is overloaded) due to manual intervention in the process, torque generated in the rotation process of the conversion bracket30425can overcome the elastic extrusion force applied by the elastic piece304253on the rolling piece304254, so that the rolling piece304254falls off the corresponding slot. In this case, a connection relationship between the conversion bracket30425and the motor connecting piece304235may be broken, and torque applied on the conversion bracket30425is not applied on the motor connecting piece304235, to avoid damage to the motor connected to the motor connecting piece304235.

Therefore, in this application, the conversion bracket30425may serve as a torque limiter between the protection mechanism3042and the motor3041, to prevent excessively large external torque from being applied on the motor back, thereby limiting torque overloaded protection for the motor3041.

According to the automatic opening and closing apparatus provided in this application, during switching between a manual working mode and an electrical working mode, different torque can be generated through switching the connection relationship between the conversion bracket30425and the motor connecting piece304235, so that torque required in the manual working mode and the electrical working mode can be met, thereby meeting user experience. In addition, torque between the conversion bracket30425and the motor connecting piece304235and torque between the second gear piece304232and the conversion bracket30425can be both implemented by using the elastic piece304253. This helps reduce space occupied by the automatic opening and closing apparatus, to implement a miniaturization design of the automatic opening and closing apparatus.

In this application, in a process of using the automatic opening and closing apparatus to drive the keyboard assembly to be opened or closed, to improve movement stability of the keyboard assembly, a plurality of groups of automatic opening and closing apparatuses may be disposed in the rotating shaft mechanism. For example, one automatic opening and closing apparatus may be disposed at each of two ends of the rotating shaft mechanism in the length direction. In this way, the movement stability of the keyboard assembly can be effectively improved in a synchronous driving manner performed by using the two automatic opening and closing apparatuses.

In this application, the rotating assembly301of the rotating shaft mechanism3may be disposed in another possible manner in addition to the manner provided in the foregoing embodiment. For example,FIG.32ais a schematic diagram of a structure of the rotating assembly301according to another embodiment of this application.FIG.32ais a schematic diagram of a structure of the rotating assembly301when the keyboard assembly2is in the closed state. In addition,FIG.32bis a schematic diagram of a structure of the rotating assembly301when the keyboard assembly2is in the opened state.

With reference to bothFIG.32aandFIG.32b, the rotating assembly301includes the connecting piece3011, the first fastening piece3012, and the second fastening piece3013. The first fastening piece3012and the second fastening piece3013may be fixedly connected to the keyboard body. A connection manner may be but is not limited to a connection by using a fastener such as a screw. In addition, the first fastening piece3012and the second fastening piece3013may serve as support kits of the entire rotating assembly301. The first fastening piece3012and the second fastening piece3013are spaced. Another structure of the rotating assembly301may be directly or indirectly connected to the first fastening piece3012and the second fastening piece3013.

For ease of understanding of a connection relationship between structures of the rotating assembly301, refer toFIG.33.FIG.33is an exploded view of the rotating assembly301shown inFIG.32a. In this embodiment, the connecting piece3011includes the body portion30111disposed in a long-strip structure. The body portion30111may be fixedly connected to the host support kit. A connection manner may be but is not limited to a tight connection by using a fastener such as a screw. Still with reference toFIG.33, the body portion30111may have two segments, and the connecting piece3011further includes a connection structure disposed between the two segments of the body portion30111. The connection structure is configured to connect the two segments of the body portion30111.

In this application, the rotating assembly301further includes the first connection rod3016and the second connection rod3017, and the first connection rod3016is located between the connecting piece3011and the second connection rod3017. One end that is of the first connection rod3016and that faces the connecting piece3011is rotatively connected to the connection structure of the connecting piece3011through the first rotating shaft3015a, and one end that is of the first connection rod3016and that faces the second connection rod3017is rotatively connected to the second connection rod3017through the second rotating shaft3015b.

Still with reference toFIG.33, the rotating assembly301provided in this embodiment of this application may further include the main shaft3018, and the main shaft3018penetrates the first fastening piece3012, the second connection rod3017, and the second fastening piece3013. The main shaft3018can rotate relative to the first fastening piece3012and the second fastening piece3013. In addition, in the radial direction of the main shaft3018, the second connection rod3017and the main shaft3018are fastened relative to each other. In this case, the second connection rod3017and the main shaft3018may rotate synchronously around the axis of the main shaft3018. In a possible embodiment of this application, to relatively fasten the second connection rod3017and the main shaft3018in the radial direction, an irregular hole may be disposed on the second connection rod3017. For example, the irregular hole may be but is not limited to a D-shaped hole. In addition, the section of the part that is of the main shaft3018and that penetrates the second connection rod3017is also set to an irregular section that can match the irregular hole, to implement limiting of the second connection rod3017and the main shaft3018in the radial direction.

In this application, in order that the rotating assembly301can provide damping force in a corresponding rotation position for the rotating shaft mechanism in an entire movement process of the entire rotating shaft mechanism to keep the rotating shaft mechanism in the corresponding rotation position, still with reference toFIG.33, in a possible embodiment of this application, an elastic piece3019may be further disposed on the rotating assembly301, and the elastic piece3019may accumulate elastic force when being pressed. As shown inFIG.33, the elastic piece3019may be disposed on a side that is of the first fastening piece3012and that is away from the second fastening piece3013. A specific disposing form of the elastic piece3019is not limited in this application. For example, the elastic piece3019may include an elastic pad. There may be one or more elastic pads. When the elastic piece3019includes a plurality of elastic pads, the plurality of elastic pads may be disposed in a stacked manner. In addition, with reference toFIG.33, the elastic piece3019may be sleeved on the main shaft3018. In this embodiment, when the elastic piece3019is pressed, the elastic piece3019generates elastic force along the axial direction of the main shaft3018.

In addition, to prevent the elastic piece3019from falling off the main shaft3018, the limiting piece3020may be further disposed on the side that is of the elastic piece3019and that is away from the first fastening piece3012. For example, the limiting piece3020may be a nut, to facilitate assembly and disassembly. The limiting piece3020is sleeved on the main shaft3018, and limits the elastic piece3019along the axial direction of the main shaft3018. In this application, to apply effective force on the elastic piece3019, a group of gaskets3021may be further disposed. The group of gaskets3021are sleeved on the main shaft3018. The elastic piece3019is disposed between the group of gaskets3021. In addition, the outer ring diameter of the gasket3021may be further greater than or equal to the outer ring diameter of the elastic piece3019. The limiting piece3020may abut against the gasket3021located on the side that is of the elastic piece3019and that is away from the first fastening piece3012.

It should be noted that, in this application, the elastic piece3019may be deformed along the axial direction of the main shaft3018. The elastic force generated due to the deformation of the elastic piece3019may be applied on the first fastening piece3012, to generate the friction force between the first fastening piece3012and the elastic piece3019. The friction force may hinder rotation of the main shaft3018. In addition, the second connection rod3017and the main shaft3018may rotate synchronously. The second connection rod3017can drive the connecting piece3011to rotate. The connecting piece3011is fixedly connected to the host support kit4fastened to the first support board2021shown inFIG.3b. Therefore, when the second connection rod3017is hindered as the main shaft3018rotates, movement of the first support board2021is hindered. In this way, the elastic force generated by the elastic piece3019is converted into damping force that hinders rotation of the rotating shaft mechanism.

It may be understood that the host1may be fastened to the first support board2021. When the host1reaches a specific rotation position in a rotation process of the first support board2021, if torque generated by gravity of the host1is equal to torque generated by the damping force of the rotating shaft mechanism3, the first support board2021can hover in the corresponding rotation position without external force.

Because the rotating shaft mechanism3requires different damping force in different rotation positions, a change of the damping force may be implemented through changing the elastic force generated by the elastic piece3019. The change of the elastic force of the elastic piece3019may be implemented through changing deformation of the elastic piece3019. In a possible embodiment of this application, in order that the elastic piece3019has corresponding deformation in different rotation positions, an extrusion contact surface may be disposed between the first fastening piece3012and the elastic piece3019. During specific implementation, still with reference toFIG.33, the first extrusion structure3022is disposed between the elastic piece3019and the first fastening piece3012. The first extrusion structure3022is sleeved on the main shaft3018. The elastic piece3019may press the first extrusion structure3022toward the first fastening piece3012, so that the first extrusion structure3022abuts against the first fastening piece3012under the elastic force of the elastic piece3019. In addition, in the radial direction of the main shaft3018, the first extrusion structure3022and the main shaft3018are fastened relative to each other. The irregular hole may be disposed on the first extrusion structure3022. For example, the irregular hole may be but is not limited to a D-shaped hole. In addition, a section of a part that is of the main shaft3018and that penetrates the first extrusion structure3022is also set to an irregular section that can match the irregular hole, to implement limiting of the first extrusion structure3022and the main shaft3018in the radial direction.

In this embodiment of this application, the first extrusion structure3022may be disposed with reference to the first extrusion structure3022shown inFIG.9. Details are not described herein. It may be understood be learned from the description of the foregoing embodiment that the first slot30221may be disposed on an end face that is of the first extrusion structure3022and that faces the first fastening piece3012.

In addition, the second extrusion structure3026may be further disposed in the rotating assembly301.FIG.34is a schematic diagram of a structure of the second extrusion structure3026according to a possible embodiment of this application. With reference to bothFIG.33andFIG.34, the second extrusion structure3026is disposed between the first extrusion structure3022and the first fastening piece3012, and the main shaft3018may be rotatively connected to the second extrusion structure3026. The elastic piece3019may press the first extrusion structure3022toward the second extrusion structure3026. In addition, a first protrusion30261may be disposed on an end face that is of the second extrusion structure3026and that faces the first extrusion structure3022, and the first protrusion30261may be correspondingly disposed for the first slot30221of the first extrusion structure3022. It may be understood that, in some other embodiments of this application, the first slot30221may also be disposed on an end face that is of the second extrusion structure3026and that faces the first extrusion structure3022, and the first protrusion30261may be disposed on an end face that is of the first extrusion structure3022and that faces the second extrusion structure3026.

When the correspondingly disposed first protrusion30261falls into the first slot30221so that the first slot30221cooperates with and is clamped to the first protrusion30261, a total length of the first extrusion structure3022and the second extrusion structure3026in the axial direction of the main shaft3018is the smallest. In this case, the extrusion force on the elastic piece3019is the smallest, so that the generated elastic force is the smallest. Therefore, friction force between the first extrusion structure3022and the second extrusion structure3026is the smallest. After the first extrusion structure3022and the second extrusion structure3026rotate relative to each other, when the first slot30221is misaligned with the first protrusion30261, a total length of the first extrusion structure3022and the second extrusion structure3026in the axial direction of the main shaft3018increases. Therefore, the elastic piece3019accumulates elastic force. Under the elastic force, the friction force between the first extrusion structure3022and the second extrusion structure3026increases, thereby increasing damping force of the rotating shaft mechanism.

It should be noted that, in this application, through properly designing the first slot30221and the first protrusion30261, the damping force of the rotating shaft mechanism3is the largest when the corresponding keyboard assembly is in the closed state, so that the keyboard assembly can be stably kept in the closed state.

Still with reference toFIG.33, in this application, an elastic piece3023may be further disposed in the rotating assembly301. The elastic piece3023may be, for example, a torsion spring. With reference to bothFIG.32aandFIG.33, the elastic piece3023is disposed on the side that is of the second fastening piece3013and that is away from the first fastening piece3012, the elastic piece3023is sleeved on the main shaft3018, and the elastic piece3023can rotate relative to the main shaft3018. In addition, the rotating assembly301further includes a rotation fastening piece3027. The rotation fastening piece3027is located on a side that is of the elastic piece3023and that is away from the second fastening piece3013. The rotation fastening piece3027is sleeved on the main shaft3018. In the radial direction of the main shaft3018, the rotation fastening piece3027is fixedly connected to the main shaft3018. A locking slot30271is disposed on the rotation fastening piece3027. One end of the elastic piece3023can be locked in the locking slot30271, and the other end of the elastic piece can be fastened to the second fastening piece3013. In this way, in the rotation process of the main shaft3018, the elastic piece3023may generate elastic deformation, thereby generating elastic force in a direction around the axial direction of the main shaft3018. On this basis, through a proper design, the elastic force generated by the elastic piece3023can provide auxiliary force for rotation of the main shaft3018. Therefore, when relatively small force is applied on the connecting piece3011, the main shaft3018can be driven to rotate, to improve comfortableness of the user in performing an open operation or a close operation on the keyboard assembly using the rotating assembly301.

In addition, a sleeve3028may be further disposed on the rotating assembly301. The sleeve3028can be sleeved on the main shaft3018. The elastic piece3023can be sleeved on the sleeve3028. The sleeve3028may guide movement of the elastic piece3023along the axial direction, to improve movement stability of the elastic piece3023.

Still with reference toFIG.33, the rotating assembly301may further include the third connection rod3024, and the third connection rod3024can slide along the second fastening piece3013. In addition,FIG.35is a schematic diagram of a structure of the rotating assembly301shown inFIG.32afrom another angle. In this embodiment, the slide30133is disposed on the side that is of the second fastening piece3013and that is away from the connecting piece3011. The third connection rod3024can be accommodated in the slide30133, and can slide along the slide30133.

In some embodiments of this application, to prevent the third connection rod3024from falling off the slide30133, still with reference toFIG.35, a first limiting portion301331may be disposed on a side wall of the slide30133, and a second limiting portion30242may be disposed on the third connection rod3024. The second limiting portion30242can be clamped to the first limiting portion301331, and can slide in the first limiting portion301331. The first limiting portion301331may be a sliding slot, and the second limiting portion30242may be a protrusion, so that the protrusion can be clamped to the sliding slot. It may be understood that, in some other embodiments of this application, the first limiting portion301331may be alternatively a protrusion, and the second limiting portion30242may be a slot. In this way, the first limiting portion301331and the second limiting portion30242can cooperate to guide sliding of the third connection rod3024along the slide30133, to improve movement reliability of the third connection rod3024.

In addition, in the rotation process of the rotating assembly301, to implement sliding of the third connection rod3024in the slide30133, it can be learned fromFIG.33that a side that is of the third connection rod3024and that faces the second fastening piece3013has the connecting portion30241. Because the rotating assembly301can rotate with rotation of the main shaft3018, in this application, the third connection rod3024can be connected to the main shaft3018through the connecting portion30241. During specific implementation, with reference toFIG.33, a swing rod structure3029may be further disposed on the rotating assembly301provided in this application, and the swing rod structure3029may be disposed on a side that is of the second fastening piece3013and that is away from the first fastening piece3012. The swing rod structure3029can be sleeved on the main shaft3018. In addition, in the radial direction of the main shaft3018, the swing rod structure3029is fixedly connected to the main shaft3018, so that the swing rod structure3029can rotate synchronously with the main shaft3018. The swing rod structure3029has a protruding portion30291.

In addition,FIG.36ais a sectional view along G-G of the rotating assembly301shown inFIG.35. With reference to bothFIG.33andFIG.36a, a track slot302411can be disposed on the connecting portion30241of the third connection rod3024. The protruding portion30291of the swing rod structure3029can be inserted into the track slot302411, and can be in contact with a slot wall of the track slot302411. In this way, in the rotation process of the main shaft3018, the swing rod structure3029can be driven to rotate synchronously, so that the protruding portion30291of the swing rod structure3029slides along the slot wall of the track slot302411.

It may be understood that, a movement trajectory of the third connection rod3024can be designed through properly designing the track slot302411. For example, when the rotating assembly301is in the closed state shown inFIG.36a, the protruding portion30291of the swing rod structure3029abuts against the slot wall that is of the track slot302411and that is away from the connecting piece3011, so that the third connection rod3024can be hidden in the second fastening piece3013. In addition,FIG.36bshows a relative position of the protruding portion30291of the third connection rod3024in the track slot302411when the rotating assembly301is in an intermediate state from the closed state to the opened state. It can be learned fromFIG.36bthat, corresponding to the intermediate state, a recessed portion3024111may be disposed in the track slot302411, and the protruding portion30291may extend into the recessed portion3024111. In a process of continuing to open the rotating assembly301from the intermediate state shown inFIG.36b, the protruding portion30291may press a side wall of the recessed portion3024111, to push the third connection rod3024to slide in a direction toward the connecting piece3011.FIG.36cshows a relative position of the protruding portion30291of the third connection rod3024in the track slot302411when the rotating assembly301is in the opened state. When the rotating assembly301is in the opened state shown inFIG.36c, the third connection rod3024may extend from the second fastening piece3013in a direction of approaching the connecting piece. For example, when the rotating assembly301is used for the keyboard assembly, in the process in which the keyboard assembly is changed from the closed state to the opened state, the third connection rod3024can slide in a direction toward the keyboard body. On the contrary, in the process in which the keyboard assembly is changed from the opened state to the closed state, the third connection rod3024can slide in the slide along a direction away from the connecting piece3011, so that the third connection rod3024slides along the direction away from the keyboard body.

It should be noted that, when the rotating shaft mechanism provided in this embodiment of this application is used for the keyboard assembly, the third connection rod3024can be configured to connect to the rotating shaft connecting piece2014of the keyboard body201shown inFIG.13a. In this way, in a process in which the third connection rod3024slides with rotation of the main shaft3018, the rotating shaft connecting piece2014can be driven to move in a direction toward or away from the rotating shaft mechanism3. It may be understood that, in this application, when the third connection rod3024slides along the direction toward the keyboard body201, the rotating shaft connecting piece2014can be driven to move along the direction away from the rotating shaft mechanism3; and when the third connection rod3024slides along the direction away from the keyboard body201, the rotating shaft connecting piece2014can be driven to move along the direction toward the rotating shaft mechanism3. Alternatively, when the third connection rod3024slides along the direction toward the keyboard body201, the rotating shaft connecting piece2014can be driven to move along the direction toward the rotating shaft mechanism3; and when the third connection rod3024slides along the direction away from the keyboard body201, the rotating shaft connecting piece2014can be driven to move along the direction away from the rotating shaft mechanism3. Therefore, when the keyboard assembly is in the opened state, the keys on the keyboard body201are in the up state; or when the keyboard assembly is in the closed state, the keys on the keyboard body201go down. For a specific manner of disposing the keyboard body, refer to the foregoing embodiment. Details are not described herein again.

In addition, when the automatic opening and closing apparatus is further disposed on the rotating shaft mechanism, refer to the foregoing embodiment for a connection relationship between the rotating assembly and the automatic opening and closing apparatus in this embodiment of this application, a manner in which the automatic opening and closing apparatus drives the rotating assembly to move, and a specific manner of disposing the automatic opening and closing apparatus. Details are not described herein again.

It should be noted that, in this application, a structure including the support portion202and the rotating shaft mechanism3mentioned in any foregoing embodiment may be defined as a support assembly. The support assembly may use the specific structure that is described in the foregoing embodiment and that depends on the keyboard assembly2to implement a case in which the first support board2021rotates to drive the third support board2023to slide along the direction toward or away from the rotating shaft mechanism3. In addition, the support assembly may be disposed without depending on the structure of the keyboard assembly2. When the first support board2021rotates around the rotating shaft mechanism3, the third support board2023can be driven to slide along the direction toward or away from the rotating shaft mechanism3. Therefore, a stable support structure can be formed among the first support board2021, the second support board, and the third support board2023.

In addition, the support assembly may be used for an electronic device. The electronic device may further include the host1. For example, the host1may be the tablet computer in the foregoing embodiment. The host1may be fastened to the first support board2021. The host1may move along a specified trajectory with the first support board2021. In addition, in a process in which the first support board2021moves and drives the third support board2023to slide along a direction toward or away from the rotating shaft mechanism3, a triangular support structure surrounding the rotating shaft mechanism3can be formed among the first support board2021, a second support board, and the third support board2023. This can help improve support stability of the support portion202for the host1, thereby improving structural reliability of the electronic device.

In a possible embodiment of this application, a structure including the protection mechanism3042and the motor mentioned in any foregoing embodiment may be defined as a motor assembly. The motor assembly may protect the motor by using the specific structure that is described in the foregoing embodiment and that depends on the keyboard assembly2, or may be disposed without depending on the structure of the keyboard assembly2. When the motor drives the rotation center piece to rotate, and torque applied on the conversion bracket30424is less than connection force between the conversion bracket30424and the rotation center piece, the conversion bracket30424is connected to the motor connecting piece, the conversion bracket30424rotates with the rotation center piece, and the conversion bracket30424drives the first gear piece to rotate around the first shaft. Rotation torque of the first gear piece is transmitted to the second rotating shaft assembly. When the torque applied on the second rotating shaft assembly is transmitted to the conversion bracket30424through the first gear piece, and the torque applied on the conversion bracket30424is greater than the connection force between the conversion bracket30424and the rotation center piece, the conversion bracket30424is disconnected from the motor connecting piece. In this way, the motor is protected.

When the motor assembly is used in an electronic device, the electronic device may be another possible foldable electronic device in addition to a two-in-one product. The electronic device only needs to include two parts that can rotate relative to the rotating shaft mechanism3in any form. For example, the electronic device may include a first housing and a second housing, and the motor assembly can be configured to drive the two housings to rotate relative to one rotating shaft mechanism3, to implement electrical opening and closing of the electronic device. In this way, operation steps of opening and closing the electronic device by the user can be simplified, thereby improving user experience. In addition, in scenarios such as a scenario of manually intervening electrical opening and closing of the electronic device, the motor assembly can protect the motor, to implement a safe and reliable automatic opening and closing function of the electronic device, to prolong service life of the electronic device.

In addition, the rotating shaft connecting piece2014of the keyboard body201mentioned in any foregoing embodiment of this application may be connected to the rotating shaft mechanism provided in the foregoing embodiment of this application, and may further use any other possible rotating shaft mechanism, provided that the rotating shaft connecting piece can be driven toward or away from the rotating shaft mechanism in a movement process of the rotating mechanism.

In addition to the foregoing keyboard assembly2, the keyboard body201provided in this application may be used in an electronic device such as a notebook computer. In addition to the keyboard body201, these electronic devices may further include a display. The display may be rotatively connected to the keyboard body201through the rotating shaft mechanism3. When the electronic device is opened, the keys2012can move along specified trajectories in a direction of coming out of the key slots, to meet a use requirement of the user for input through hitting the keys2012. In addition, when the electronic device is closed, the keys2012may move toward the key slots. In this way, the parts that are of the keys2012and that come out of the key slots are relatively small, so that the size of the entire keyboard body201is relatively small in a thickness direction, to help implement a thin design of the keyboard body201and implement a thin design of the electronic device in this state.