Patent Description:
With development of a flexible display technology, a flexible display (that is, a flexible display screen) is increasingly applied to an electronic device. In the electronic device, the flexible display and a foldable assembly are generally combined to implement folding and unfolding of the flexible display by using the foldable assembly, so as to form a folding screen of the electronic device.

The foldable assembly includes a rotating shaft part, a floating plate, and two door plates respectively disposed on two sides of the floating plate. The floating plate is disposed above the rotating shaft part, and the two door plates are pivotally connected to the rotating shaft part. The two door plates are respectively connected to the flexible display, and drive the flexible display to fold and unfold. The floating plate can provide support for the flexible display from a middle position.

The floating plate can float up and down relative to the rotating shaft part, and a groove structure is correspondingly disposed above the rotating shaft part. When the two door plates rotate and drive the flexible display to fold, the floating plate floats downward until the floating plate is at least partially located in the groove structure, so as to reduce an overall size after folding.

To ensure flatness between the door plate and the floating plate, a support plate is further disposed between the door plate and the floating plate. One side of the support plate is fastened to the door plate; and the other side is located on an upper end face of the floating plate, and may slide on the upper end face of the floating plate. However, after the door plate drives the flexible display to fold, the support plate is bent, and the floating plate floats downward. In this case, a side of the support plate facing the floating plate is easy to slide along the floating plate to a gap between the floating plate and the groove structure, and is stuck, to cause the flexible display not to be unfolded.

Therefore, when the door plate drives the flexible display to fold, how to avoid a case in which the support plate is inserted into a gap between the floating plate and the groove structure to cause sticking, and ensure that the door plate can smoothly rotate to drive the flexible display to fold and unfold is a technical problem that needs to be resolved by a person skilled in the art.

<CIT> describes a folding mechanism and an electronic device to solve the problem of excessive bending due to the beidng of flexible screens.

The scope of the invention is set out in the appended claims. An object of this application is to provide a foldable assembly of an electronic device and an electronic device. When a door plate drives a flexible display to fold, a case in which a support plate is inserted into a gap between a floating plate and a groove structure to cause sticking can be avoided, thereby ensuring that the door plate can rotate smoothly to drive the flexible display to fold and unfold.

A first aspect of embodiments of this application provides a foldable assembly of an electronic device, including a rotating shaft part, a floating plate, and two door plates, where the rotating shaft part is provided with a groove structure, the floating plate is floatably disposed above the groove structure and is located between the two door plates, the door plate is configured to fix a flexible display of the electronic device, and the door plate can rotate around the rotating shaft part to fold and unfold. A support plate is disposed between each door plate and the floating plate, the support plate includes a first connection part and a second connection part, the first connection part is connected to the door plate, second connection parts of two support plates are disposed opposite to each other, and a protruding part and a recessed part are disposed in the second connection part. In an unfolded state, the protruding parts and the recessed parts of the two support plates correspondingly fit and are located on an upper end face of the floating plate. In a folded state, the floating plate is at least partially located in the groove structure, the protruding part is elastically bent and abuts against the upper end face of the floating plate, and the recessed part is separated from the floating plate.

The second connection part is disposed as a structure that includes a protruding part and a recessed part, so that an overall width of the support plate can be increased. During folding, the protruding part slides along the floating plate and is in a folded state. Due to a relatively long length, the protruding part is still located on the upper end face of the floating plate after bending occurs, so as to avoid separating from the floating plate, thereby avoiding sticking, ensuring that the door plate can rotate smoothly, and the floating plate can be smoothly lifted and lowered, to ensure that the flexible display can be smoothly folded and unfolded.

Based on the first aspect, an embodiment of this application further provides a first implementation of the first aspect.

The two support plates have a same structure. In this way, only a support plate with s same structure needs to be produced, thereby facilitating bulk production, reducing a quantity of molds, simplifying production process, and reducing costs.

Based on the first aspect, an embodiment of this application further provides a second implementation of the first aspect.

The floating plate includes a wide segment and a narrow segment that are arranged along a length direction of the floating plate, a width of the wide segment is greater than a width of the narrow segment, a fitting segment is formed at a position where the second connection part corresponds to the narrow segment, and the fitting segment is provided with the protruding part and the recessed part. A protruding segment and a recessed segment are correspondingly disposed at a position where a width of the floating plate is relatively small, so that a probability that sticking occurs during a folding process can be effectively reduced.

Based on the second implementation of the first aspect, an embodiment of this application further provides a third implementation of the first aspect.

The fitting segment is provided with a protruding part and a recessed part. In this way, quantities of protruding parts and recessed parts to be disposed can be reduced, and maximum sizes of the protruding part and the recessed part in limited space can be ensured, thereby ensuring structural strength of the protruding parts.

Based on any one of the first aspect, or the first to the third implementations of the first aspect, an embodiment of this application further provides a fourth implementation of the first aspect.

The first connection part and the door plate, the first connection part and the flexible display, and the door plate and the flexible display are all fastened through bonding. Installation process can be simplified.

Based on the fourth implementation of the first aspect, an embodiment of this application further provides a fifth implementation of the first aspect.

Back adhesive areas are respectively disposed on end faces of two sides of the first connection part, and the first connection part is fastened to both the door plate and the flexible display by using a back adhesive layer disposed in a back adhesive area. In this way, stability of bonding between the flexible display and the door plate, between the flexible display and the support plate, and between the door plate and the support plate can be ensured, so as to avoid upwarping or bulging of a part of an edge.

Based on the fifth implementation of the first aspect, an embodiment of this application further provides a sixth implementation of the first aspect.

The first connection part is further provided with a hollowed-out hole, and the first connection part is fastened to both the door plate and the flexible display by using an adhesive dispensing structure at the hollowed-out hole. In the hollowed-out hole, the door plate, the flexible display, and the support plate are directly fastened through bonding by using the adhesive dispensing structure, so that bonding stability can be further enhanced.

Based on any one of the first aspect, or the first to the sixth implementations of the first aspect, an embodiment of this application further provides a seventh implementation of the first aspect.

The support plate is an insulating plate used to avoid impact on use of the electronic device.

Based on any one of the first aspect, or the first to the sixth implementations of the first aspect, an embodiment of this application further provides an eighth implementation of the first aspect.

The support plate is a metal plate, and a surface of the support plate is covered with an insulation layer, so as to avoid the impact on use of the electronic device.

Based on any one of the first aspect, or the first to the eighth implementations of the first aspect, an embodiment of this application further provides a ninth implementation of the first aspect.

Lubricating grease is further applied between the second connection part and the upper end face of the floating plate, so as to avoid wear between the second connection part and the floating plate, thereby protecting the second connection part and the floating plate, and prolonging a service life.

A second aspect of embodiments of this application provides an electronic device, including a flexible display and the foldable assembly according to any one of the first aspect, the first to the ninth implementations of the first aspect.

Technical effects of the electronic device are similar to those of the foregoing foldable assembly. To save space, details are not described herein again.

To describe technical solutions in embodiments of this application or in the conventional technology more clearly, the following briefly describes accompanying drawings required for describing embodiments or the conventional technology. Apparently, the accompanying drawings in the following description show some embodiments of the present invention, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

Reference numerals in <FIG> are described as follows:.

To enable a person skilled in the art to better understand technical solutions of this application, the following further describes this application in detail with reference to accompanying drawings and specific embodiments.

Embodiments of this application provide a foldable assembly of an electronic device and an electronic device, where the electronic device may be a terminal product including a foldable flexible display, such as a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR) device, a notebook computer, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook, or a personal digital assistant (personal digital assistant, PDA). A specific type of the electronic device is not limited in embodiments of this application.

As shown in <FIG>, the electronic device includes a flexible display <NUM>, a foldable assembly <NUM>, and a housing <NUM>. The foldable assembly <NUM> is approximately located in a middle position of the housing <NUM>, and divides the housing <NUM> into two parts. The two parts may be an integrated structure, or may be a structure with two mutually independent parts that are divided by the foldable assembly <NUM>.

As shown in <FIG>, the foldable assembly <NUM> includes a rotating shaft part <NUM> and two door plates <NUM>. The two door plates <NUM> are respectively located on two sides of the rotating shaft part <NUM>, the door plates <NUM> can rotate around the rotating shaft part <NUM>, and the two door plates <NUM> are respectively correspondingly connected and fastened to two parts of the housing <NUM>. In this way, the housing <NUM> forms a structure that can rotate around the rotating shaft part <NUM> and implement folding and unfolding. In this embodiment, the two door plates <NUM> can rotate around the rotating shaft part <NUM>. Specifically, rotation axes of the two door plates <NUM> are parallel or collinear, and are parallel to a length direction of the rotating shaft part <NUM>.

The flexible display <NUM> is fastened to an upper end face of the housing <NUM>. In addition, a middle position of the flexible display <NUM> is further fastened to an upper end face of a door plate <NUM>. As shown in <FIG>, "upper" means a side facing a user when the electronic device is in use, that is, a side that is of the flexible display <NUM> and that faces the user when the electronic device is in use. In an unfolded state, as shown in <FIG>, the upper end face of the door plate <NUM> aligns with the upper end face of the housing <NUM>, so that the flexible display <NUM> can be flat in the unfolded state.

Specifically, during use, if the user needs to fold the electronic device in an unfolded state, the housing <NUM> may be manually operated, so that the two parts of the housing <NUM> are respectively bent upward in a direction indicated by a dotted arrow in <FIG>. Specifically, two hands may respectively act on the two parts of the housing <NUM>, so that the housing <NUM> is bent toward a side on which the flexible display <NUM> is disposed. In this case, the two parts of the housing <NUM> can rotate around the rotating shaft part <NUM> by respectively using the door plates <NUM>, thereby implementing folding. Similarly, when an electronic device in a folded state needs to be unfolded, the housing <NUM> may be manually operated, so that the two parts of the housing <NUM> respectively moves to two sides along a direction indicated by a dotted arrow shown in <FIG>. In this case, the two parts of the housing <NUM> can rotate to two sides around the rotating shaft part <NUM> by respectively using the door plates <NUM>, thereby implementing unfolding.

As shown in <FIG>, the foldable assembly <NUM> further includes a floating plate <NUM>, and the floating plate <NUM> is disposed between the two door plates <NUM>. A length direction of the floating plate <NUM>, a length direction of the rotating shaft part <NUM>, and a rotation axis of the door plate <NUM> are parallel to one another. The floating plate <NUM> can provide support for the flexible display <NUM> from a position between the two door plates <NUM>. A groove structure <NUM> is disposed on an upper end face of the rotating shaft part <NUM> along the length direction of the rotating shaft part <NUM>, and the floating plate <NUM> is disposed above the groove structure <NUM> of the rotating shaft part <NUM>. The floating plate <NUM> can float up and down relative to the rotating shaft part <NUM>. Specifically, during folding, the floating plate <NUM> can float downward relative to the rotating shaft part <NUM>, the flexible display <NUM> folds along with the door plate <NUM>, and the middle position of the flexible display <NUM> floats downward along with the floating plate <NUM>. When a folded state is reached, the floating plate <NUM> is at least partially located in the groove structure <NUM>, which may specifically be that a part of the floating plate <NUM> is located in the groove structure <NUM>, or may be that all floating plate <NUM> enters the groove structure <NUM>. In this case, a folded flexible display <NUM> forms a waterdrop-shaped structure between the door plate <NUM> and the floating plate <NUM> as shown in <FIG>. The floating plate <NUM> can provide protection for the flexible display <NUM> in a folded state to prevent a fracture at the middle position of the flexible display <NUM> due to an excessively large bending angle. During unfolding, the flexible display <NUM> unfolds along with the door plate <NUM>, the floating plate <NUM> can float upward relative to the rotating shaft part <NUM>, and in an unfolded state, an upper end face of the floating plate <NUM> and the upper end face of the door plate <NUM> are aligned, so that the flexible display <NUM> is provided with a flat support surface, and the flexible display <NUM> can be spread and unfolded as shown in <FIG>.

As shown in <FIG>, the door plate <NUM> is provided with a main swing arm <NUM> and an auxiliary swing arm (not shown in the figure), and the main swing arm <NUM> and the auxiliary swing arm are respectively connected between the door plate <NUM> and the rotating shaft part <NUM>. The main swing arm <NUM> can rotate around the rotating shaft part <NUM>, so as to implement rotation of the door plate <NUM> around the rotating shaft part <NUM>, and the auxiliary swing arm can implement a guide connection function between the door plate <NUM> and the rotating shaft part <NUM>.

As shown in <FIG>, the main swing arm <NUM> is provided with a fitting segment <NUM>, and the rotation shaft part <NUM> is provided with an arc-shaped slide <NUM>. When rotating around the rotating shaft part <NUM>, the door plate <NUM> can drive the main swing arm <NUM> and the auxiliary swing arm to rotate. The fitting segment <NUM> of the main swing arm <NUM> can slide along the arc-shaped slide <NUM>. The arc-shaped slide <NUM> communicates with the groove structure <NUM>, and an end part <NUM> on a side of the fitting segment <NUM> away from the door plate <NUM> is further provided with a support structure <NUM>. The fitting segment <NUM> slides along the arc-shaped slide <NUM> to the support structure <NUM> to protrude from the arc-shaped slide <NUM> and enter the groove structure <NUM>. The support structure <NUM> can provide support for the floating plate <NUM> from a lower end face, and as the door plate <NUM> unfolds, the support structure <NUM> protrudes from the arc-shaped slide <NUM> and increases in height. In this case, the support structure <NUM> can support the floating plate <NUM> to float upward until the door plate <NUM> is in an unfolded state, the support structure <NUM> supports the floating plate <NUM> to stabilize its position, and the upper end face of the door plate <NUM> and the upper end face of the floating plate <NUM> are aligned and flat.

Certainly, in this embodiment, the floating plate <NUM> may alternatively be supported by using the auxiliary swing arm. The auxiliary swing arm is connected to the door plate <NUM>, and in a process in which the door plate <NUM> rotates around the rotating shaft part <NUM>, the auxiliary swing arm and the lower end face of the floating plate <NUM> are driven to function, so that the floating plate <NUM> can float up and down relative to the rotating shaft part <NUM>; alternatively, the main swing arm <NUM> and the auxiliary swing arm may simultaneously provide support for the floating plate <NUM>. This is not specifically limited herein.

In addition, a spring (not shown in the figure) is disposed in the groove structure <NUM>, and the spring can act on the floating plate <NUM>, so that the floating plate <NUM> has a tendency of moving into the groove structure <NUM>. That is, the spring can act on the floating plate <NUM>, so that the floating plate <NUM> floats downward relative to the rotating shaft part <NUM>. Specifically, the spring may be disposed between the lower end face of the floating plate <NUM> and a bottom wall of the groove structure <NUM>. During folding, the door plate <NUM> drives the fitting segment <NUM> to move outward along the arc-shaped slide <NUM>. In this case, the support structure <NUM> gradually decreases in height and enters the arc-shaped slide <NUM>, and support action of the support structure <NUM> on the floating plate <NUM> is removed. The floating plate <NUM> floats downward under the action of the spring and enters the groove structure <NUM>.

That is, floating of the floating plate <NUM> relative to the rotating shaft part <NUM> may be mechanically controlled by the support structure <NUM> of the main swing arm <NUM> and/or the auxiliary swing arm and the spring, and performance is stable, so as to ensure that in an unfolded state, the upper end face of the floating plate <NUM> and the upper end face of the door plate <NUM> can be aligned, and in a folded state, the floating plate <NUM> can at least partially enter the groove structure <NUM>.

The door plate <NUM> can rotate around the rotating shaft part <NUM>. The floating plate <NUM> can float up and down relative to the rotating shaft part <NUM>. There is no direct connection between the door plate <NUM> and the floating plate <NUM>. Therefore, there is a gap between the door plate <NUM> and the floating plate <NUM>, especially in a folded state, the door plate <NUM> folds and rotates upward relative to the rotating shaft part <NUM>, and the floating plate <NUM> floats downward relative to the rotating shaft part <NUM>. In this case, a gap between the door plate <NUM> and the floating plate <NUM> is larger. As shown in <FIG>, a support plate <NUM> is disposed between each door plate <NUM> and the floating plate <NUM>. The support plate <NUM> includes a first connection part <NUM> and a second connection part <NUM>. The first connection part <NUM> is connected to the upper end face of the door plate <NUM>, and second connection parts <NUM> of two support plates <NUM> are disposed opposite to each other. The second connection part <NUM> is located on the upper end face of the floating plate <NUM>, and the support plate <NUM> can be configured to provide support for the flexible display <NUM> between the door plate <NUM> and the floating plate <NUM>.

Specifically, when the door plate <NUM> rotates around the rotating shaft part <NUM> and drives the flexible display <NUM> to rotate to an unfolded state, the floating plate <NUM> floats upward relative to the rotating shaft part <NUM> to the upper end face of the floating plate <NUM> to align with the upper end face of the door plate <NUM>. In this case, the second connection part <NUM> of the support plate <NUM> is located on the upper end face of the floating plate <NUM>, and the support plate <NUM> is in a flat state, and serves as a transition connection between the door plate <NUM> and the floating plate <NUM>, to ensure overall flatness of the foldable assembly <NUM>, and provide flat support for the flexible display <NUM>, so as to avoid a case in which the flexible display <NUM> may be easily damaged due to relatively weak local support. When the door plate <NUM> rotates around the rotating shaft part <NUM> and drives the flexible display <NUM> to rotate to a folded state, the floating plate <NUM> floats downward until the floating plate <NUM> is at least partially located in the groove structure <NUM>. In this case, the floating plate <NUM> is located in a lowest position, and a gap between the floating plate <NUM> and the door plate <NUM> becomes larger. The first connection part <NUM> of the support plate <NUM> moves along with the door plate <NUM>, and the support plate <NUM> is elastically bent. The second connection part <NUM> is still located on the upper end face of the floating plate <NUM>, so as to provide transition support for the flexible display <NUM> between the door plate <NUM> and the floating plate <NUM>.

In a folded state, the floating plate <NUM> is at least partially located in the groove structure <NUM>. Disposing the groove structure <NUM> can reduce a thickness of the foldable assembly <NUM> at the rotating shaft part <NUM>, and then reduce a protrusion size of the rotating shaft part <NUM> after the electronic device is folded, so that when a size of a flexible display <NUM> is given, an overall size after the electronic device is folded can be reduced.

Because the floating plate <NUM> can float up and down relative to the groove structure <NUM>, there must be a gap between the floating plate <NUM> and the groove structure <NUM>. During folding, the first connection part <NUM> moves along with the door plate <NUM>, and drives two second connection parts <NUM> to move along the upper end face of the floating plate <NUM> toward an edge side of the floating plate <NUM>. Because a width of the floating plate <NUM> is relatively small, to avoid a case in which the second connection part <NUM> slides along the upper end face of the floating plate <NUM> to outside of the floating plate <NUM>, and is stuck into a gap between the floating plate <NUM> and the groove structure <NUM>, in this embodiment, the support plate <NUM> is disposed as a structure in which the second connection part <NUM> is provided with a protruding part <NUM> and a recessed part <NUM>, protruding parts <NUM> and recessed parts <NUM> of the two support plates <NUM> are disposed corresponding to each other; that is, the protruding part <NUM> of one support plate <NUM> is disposed corresponding to the recessed part <NUM> of the other support plate <NUM>, and the recessed part <NUM> of one support plate <NUM> is disposed corresponding to the protruding part <NUM> of the other support plate <NUM>. As shown in <FIG>, the second connection parts <NUM> of the two support plates <NUM> each are not a flat structure, but are correspondingly provided with the protruding parts <NUM> and the recessed parts <NUM>. In this way, compared with a structure in which the second connection part <NUM> is disposed as a flat structure, an overall width of the support plate <NUM> can be increased. During folding, as shown in <FIG>, the protruding part <NUM> after bending occurs is still located on the upper end face of the floating plate <NUM> and abuts against the upper end face of the floating plate <NUM>, to avoid separating from the floating plate <NUM>, and avoid a case of sticking, so as to ensure that the door plate <NUM> can rotate smoothly and the floating plate <NUM> can be lifted and lowered smoothly, and then ensure that the flexible display <NUM> can be folded and unfolded smoothly.

Specifically, in an unfolded state, a structure of the two support plates <NUM> is shown in <FIG>. Protruding parts <NUM> and recessed parts <NUM> of the two support plates <NUM> correspondingly fit, and are located on the upper end face of the floating plate <NUM>. In this case, the support plate <NUM> is flat, and can provide flat support for the flexible display <NUM> between the door plate <NUM> and the floating plate <NUM>. When the two door plates <NUM> rotate around the rotating shaft part <NUM> and drive the flexible display <NUM> to fold, the support plate <NUM> is driven by the door plate <NUM> to elastically deform. Specifically, the first connection part <NUM> is driven to be upwarped by the door plate <NUM>, and the second connection part <NUM> floats downward along with the floating plate <NUM>. However, space in which the floating plate <NUM> floats downward is limited, so that the support plate <NUM> may be elastically bent. As shown in <FIG>, the recessed part <NUM> is directly driven by the first connection part <NUM> and separated from the floating plate <NUM>, and the protruding part <NUM> is bent. However, because a length of the protruding part <NUM> in a width direction of the floating plate <NUM> is relatively long, the protruding part <NUM> still abuts against the upper end face of the floating plate <NUM> after bending occurs, and does not slide out of an edge of the floating plate <NUM>. Therefore, it can be ensured that in a folded state, a case in which the second connection part <NUM> of the support plate <NUM> enters a gap between the floating plate <NUM> and the groove structure <NUM> to cause sticking can be avoided. When the door plate <NUM> drives the flexible display <NUM> to unfold again, the door plate <NUM> drives the first connection part <NUM> of the support plate <NUM> to unfold toward two sides, the floating plate <NUM> also floats upward relative to the rotating shaft part <NUM>, and the support plate <NUM> restores to its original state, and the protruding parts <NUM> and the recessed parts <NUM> of the two support plates <NUM> fit again.

In this embodiment, the two support plates <NUM> are of the same structure. Specifically, as shown in <FIG>, when the protruding parts <NUM> and the recessed parts <NUM> of the two support plates <NUM> correspondingly fit, the two support plates <NUM> are symmetrically disposed about a center between the two support plates. During installation, the first connection part <NUM> of one support plate <NUM> is connected to one door plate <NUM>, the other support plate <NUM> is reversed <NUM>° around an axis along a length direction of the other support plates <NUM>, and is reversed <NUM>° around an axis along a width direction of the other support plate <NUM>, and the first connection part <NUM> of the other support plate <NUM> is connected to the other door plate <NUM>. In other words, the protruding part <NUM> and the recessed part <NUM> on two sides of a same support plate <NUM> are also disposed correspondingly, so that the support plate <NUM> can fit with the other support plate <NUM> with a same structure. In this way, only a support plate <NUM> with a same structure needs to be produced, thereby facilitating bulk production, reducing a quantity of molds, simplifying production process, and reducing costs. Certainly, in this embodiment, the two support plates <NUM> may alternatively be of different structures, provided that the protruding parts <NUM> and the recessed parts <NUM> of the two support plates <NUM> can correspondingly fit.

In this embodiment, a specific arrangement of the protruding part <NUM> and the recessed part <NUM> on the second connection part <NUM> is not limited. For example, the protruding part <NUM> and the recessed part <NUM> may be successively arranged in a staggered manner along a length direction of the second connection part <NUM>, or the second connection part <NUM> is further provided with a spacing segment <NUM>. The spacing segment <NUM> indicates a structure in which an abutment side of the support plate <NUM> is not provided with the protruding part <NUM> or the recessed part <NUM>, and the spacing segments <NUM> of the two support plates <NUM> are also correspondingly disposed. In an unfolded state, the protruding parts <NUM> and the recessed parts <NUM> of the two support plates <NUM> correspondingly fit, and the spacing segments <NUM> correspondingly fit and form a flat structure.

Specifically, disposing the protruding part <NUM> can increase an overall width of the support plate <NUM>, so as to avoid a case in which the second connection part <NUM> slides into a gap between the floating plate <NUM> and the groove structure <NUM> to cause sticking. A specific arrangement of the protruding part <NUM> and the recessed part <NUM> is not limited. The protruding part <NUM> and the recessed part <NUM> may be disposed based on a specific case of the electronic device, for example, a length and a width of the floating plate <NUM>.

A structure of the floating plate <NUM> is not limited. Specifically, because of disposing of a structure of the rotating shaft part <NUM> and a structure of the door plate <NUM>, a connection between the rotating shaft part <NUM> and the door plate <NUM>, and the like, a width of each position of the floating plate <NUM> in a length direction is not consistent. Specifically, the floating plate <NUM> is provided with a wide segment <NUM> and a narrow segment <NUM> in the length direction. It is easy to understand that a width of the wide segment <NUM> is greater than a width of the narrow segment <NUM>. Because the width of the narrow segment <NUM> is relatively small, during folding, an abutment side <NUM> may easily slide along the narrow segment <NUM> to an edge to cause sticking. Therefore, the abutment side <NUM> is provided with a fitting segment at a position corresponding to the narrow segment <NUM>. The fitting segment is provided with the protruding part <NUM> and the recessed part <NUM>, so that a probability that sticking occurs during a folding process can be effectively reduced. A position corresponding to the abutment side <NUM> and the wide segment <NUM> is not limited in this embodiment. A protruding part <NUM> and a recessed part <NUM> may be disposed; or only a spacing segment <NUM> is disposed, but a protruding part <NUM> and a recessed part <NUM> is not disposed.

Specifically, the structure of the floating plate <NUM> needs to be disposed based on a surrounding structure. Therefore, a width of the floating plate <NUM> in a length direction of the floating plate <NUM> has not only two sizes. In this embodiment, the wide segment <NUM> refers to a larger part of an overall width, and there is a relatively low probability that the second connection part <NUM> is stuck on the wide segment <NUM>, while the narrow segment <NUM> refers to a smaller part of an overall width, and there is a relatively high possibility that the second connection part <NUM> is stuck on the wide segment <NUM>.

For example, the electronic device is a mobile phone. As shown in <FIG>, a width of two ends of the floating plate <NUM> in a length direction is relatively small and forms the foregoing narrow segment <NUM>, and a width in a middle part is relatively large and forms the foregoing wide segment <NUM>. Therefore, the foregoing sticking may easily occur at positions of the two ends of the floating plate <NUM>. In this case, as shown in <FIG>, in a length direction of the second connection part <NUM>, the second connection part <NUM> of the support plate <NUM> includes two end parts <NUM> and a middle segment <NUM> that is located between the two end parts <NUM>. The two end parts <NUM> are respectively corresponding to narrow segments <NUM> at the two ends of the floating plate <NUM>, and the middle segment <NUM> is corresponding to the wide segment <NUM> of the floating plate <NUM>. The two end parts <NUM> form the foregoing fitting segment and is provided with a protruding part <NUM> and a recessed part <NUM>, and the middle segment <NUM> is provided with only a spacing segment <NUM> but no protruding part <NUM> and no recessed part <NUM>. In this way, sticking is avoided, smoothly folding and unfolding is ensured, and an overall structure of the support plate <NUM> and production process are simplified.

Further, quantities of the protruding parts <NUM> and the recessed parts <NUM> to be disposed on each end part <NUM> (that is, a fitting segment) are not limited. As shown in <FIG>, each end part <NUM> is provided with one protruding part <NUM> and one recessed part <NUM>. In this way, the quantities of the protruding part <NUM> and the recessed part <NUM> that are disposed can be reduced. In addition, maximum sizes of the protruding part <NUM> and the recessed part <NUM> in limited space can be ensured, and structural strength of the protruding part <NUM> is ensured, so that a case in which when the door plate <NUM> drives the flexible display <NUM> to fold, the protruding part <NUM> is bent to cause a fracture or plastic deformation, or the like can be avoided.

In this embodiment, a specific shape of the protruding part <NUM> and the recessed part <NUM> is not limited. As shown in <FIG>, the protruding part <NUM> may be set to a trapezoidal structure, or the protruding part <NUM> may be set to a triangular structure, a square structure, or the like, and alternatively an edge of the second connection part <NUM> may be set to a wave-shaped structure for a smooth transition.

As shown in <FIG>, in the second connection part <NUM> of a same support plate <NUM>, one end part <NUM> is provided with a protruding part <NUM> and a recessed part <NUM> from outside to inside, and the other end part <NUM> is provided with a recessed part <NUM> and a protruding part <NUM> from outside to inside. The outside refers to a side of the end part <NUM> away from the middle segment <NUM>, and the inside refers to a side of the end part <NUM> facing the middle segment <NUM>. In this way, two same support plates <NUM> can fit with each other. In addition, in this embodiment, shape structures of the protruding parts <NUM> disposed on the same support plate <NUM> may be the same or different, and the recessed part <NUM> may be disposed based on a corresponding protruding part <NUM>.

Certainly, the quantities of the protruding parts <NUM> and the recessed parts <NUM> to be disposed on the second connection part <NUM> may be set based on a condition such as a length and a width of the floating plate <NUM>. For example, when the electronic device is a mobile phone, a length of the floating plate <NUM> is relatively short, and a group of the protruding part <NUM> and the recessed part <NUM> may be disposed at each end part <NUM> of the second connection part <NUM>. When the electronic device is a computer display, a length of the floating plate <NUM> is relatively long, two or more groups of the protruding parts <NUM> and the recessed parts <NUM> may alternatively be disposed at each end part <NUM> of the second connection part <NUM>.

In this embodiment, the first connection part <NUM> and the door plate <NUM> are fastened through bonding, the first connection part <NUM> and the flexible display <NUM> are fastened through bonding, and the door plate <NUM> and the flexible display <NUM> are also fastened through bonding. Process is relatively simple.

As shown in <FIG>, upper and lower end faces of the first connection part <NUM> are respectively provided with back adhesive areas <NUM>, and the back adhesive areas <NUM> of the first connection part <NUM> is fastened to both the door plate <NUM> and the flexible display <NUM> by using a back adhesive layer. The back adhesive layer is a sheet structure that basically covers the back adhesive area <NUM>, and the door plate <NUM> is also fastened to the flexible display <NUM> by using the back adhesive layer. That is, the first connection part <NUM> of the support plate <NUM> is disposed between the door plate <NUM> and the flexible display <NUM>, and the back adhesive areas <NUM> on the upper and lower end faces of the first connection part <NUM> are respectively fastened, through bonding, to the door plate <NUM> and the flexible display <NUM> by using the back adhesive layer. In this way, stability of bonding between the flexible display <NUM> and the door plate <NUM>, stability of bonding between the flexible display <NUM> and the support plate <NUM>, and stability of bonding between the door plate <NUM> and the support plate <NUM> can be ensured, so as to avoid upwarping or bulging of a part of an edge. In addition, it is ensured that in a rotation process, the door plate <NUM> can drive the flexible display <NUM> to fold or unfold, and can stably drive the support plate <NUM> to move, to enable the support plate <NUM> to elastically deform, to ensure a stable structure. In addition, the housing <NUM> is also fastened to the flexible display <NUM> by using a back adhesive layer.

Further, as shown in <FIG>, the first connection part <NUM> is further provided with a hollowed-out hole <NUM>, and the first connection part <NUM> can be further fastened to both the door plate <NUM> and the flexible display <NUM> by using an adhesive dispensing structure at the hollowed-out hole <NUM>. That is, when end faces at two sides of the first connection part <NUM> are respectively fastened to the door plate <NUM> and the flexible display <NUM> by using the back adhesive layer, the adhesive dispensing structure is further disposed at the hollowed-out hole <NUM>. The adhesive dispensing structure can be filled with the hollowed-out hole <NUM>, and the adhesive dispensing structure is fastened, through bonding, to the door plate <NUM> and the flexible display <NUM> on end faces at two sides of the hollowed-out hole <NUM>. At the hollowed-out hole <NUM>, the door plate <NUM>, the flexible display <NUM>, and the support plate <NUM> are directly fastened through bonding by using the adhesive dispensing structure, thereby further enhancing bonding stability.

Specifically, in this embodiment, a shape of the hollowed-out hole <NUM> is not limited. As shown in <FIG>, the hollowed-out hole <NUM> may be disposed as a strip structure disposed along a length direction of the support plate <NUM>, or may be disposed as a circular hole structure, a polygonal structure, or the like. Sizes and shapes of hollowed-out holes <NUM> may be the same or may be different, which may be set based on space of the first connection part <NUM>. The first connection part <NUM> may be provided with one row of hollowed-out holes <NUM> spaced along a length direction of the first connection part <NUM>, or may be provided with two or more rows of hollowed-out holes <NUM>. In this embodiment, when the first connection part <NUM> is provided with only one row of hollowed-out holes <NUM>, bonding stability can be ensured, space requirements on the first connection part <NUM> can be reduced, and an overall structure and installation process can be simplified. In addition, when the first connection part <NUM> is only provided with one row of hollowed-out holes <NUM>, a width of the first connection part <NUM> disposed between the door plate <NUM> and the flexible display <NUM> can be further reduced. Therefore, when the door plate <NUM> rotates and drives the support plate <NUM> to bend, an overall bending angle of the support plate <NUM> can be reduced, and a service life of the support plate <NUM> can be prolonged.

In this embodiment, the support plate <NUM> is disposed as an insulating plate, to avoid impact on use of the electronic device. Specifically, the support plate <NUM> may be directly made of an insulating material, for example, a polyethylene plate or a polyfluortetraethylene plate. Alternatively, the support plate <NUM> may be disposed as a metal plate. In addition, a surface of the metal plate is further covered with an insulation layer, so as to ensure insulativity of the support plate <NUM>.

When the support plate <NUM> is a metal plate, the back adhesive layer can form an insulation layer in the back adhesive area <NUM>, and the adhesive dispensing structure can form an insulation layer at the hollowed-out hole <NUM>. Therefore, only a part other than the back adhesive area <NUM> of the support plate <NUM> needs to be covered with the insulation layer, and process is relatively simple. Specifically, in this embodiment, a material of the insulation layer is not limited; for example, the material may be a polyethylene film or a polytetrafluoroethylene film.

In addition, lubricating grease is further disposed on an outer wall of the second connection part <NUM>. When rotating around the rotating shaft part <NUM>, the door plate <NUM> can drive the support plate <NUM> to bend. In this process, the protruding part <NUM> and the spacing segment <NUM> may be elastically bent and abut against the upper end face of the floating plate <NUM>. In addition, there is relative sliding between the protruding part <NUM> and the upper end face of the floating plate <NUM> and between the spacing segment <NUM> and the upper end face of the floating plate <NUM>. Therefore, after the lubricating grease is applied between the second connection part <NUM> and the upper end face of the floating plate <NUM>, wear between the second connection part <NUM> and the floating plate <NUM> can be avoided, thereby protecting the second connection part <NUM> and the floating plate <NUM>, and prolonging a service life.

Claim 1:
A foldable assembly of an electronic device, the foldable assembly (<NUM>) has a folded state and an unfolded state, the foldable assembly comprising:
a rotating shaft part (<NUM>);
two door plates (<NUM>), respectively located at two sides of the rotating shaft part;
two main swing arms (<NUM>), each main swing arm is connected between the corresponding door plate and the rotating shaft part, the main swing arm can rotate around the rotating shaft to switch the folding assembly between the folded state and the unfolded state;
a floating plate (<NUM>), arranged between the two door plates and extends along the axial direction of the rotating shaft part;
one end of each main swing arm far away from the door plate is provided with a fitting segment (<NUM>), two sides of the rotating shaft part are respectively provided with an arc-shaped slide (<NUM>), one end of the fitting segment far away from the door plate is provided with a support structure (<NUM>);
when the folding assembly is converted from a folded state to an unfolded state, the fitting segment can slide along the arc-shaped slide, so that the support structure protrudes from the arc-shaped slide, the support structure provides support for the lower end face of the floating plate to float the floating plate upward.