Patent Description:
This application relates to the field of electronic device accessory technologies, and in particular, to a foldable support and an electronic device.

With the development of technologies, electronic devices such as tablet computers and mobile phones are favored by more and more people because of the portability thereof. A foldable support is configured to place a tablet computer or a mobile phone, which can facilitate people to use the tablet computer or the mobile phone more conveniently. The foldable support needs to have a larger operating space that can be operated by a user, so as to improve usage experience of the user. How to increase an operable space that can be operated by the user on a basis of ensuring that the foldable support has good support performance is a topic that the industry continues to explore.

<CIT> discloses a foldable frame body comprising a plurality of portions, wherein at least two portions can be rotated against each other and the two portions provide magnetic areas such that magnetic force is generated between the two magnetic areas.

Embodiments of this application provide a foldable support and an electronic device according to the enclosed independent claims, which can increase an operable space that can be operated by a user on a basis of ensuring that the foldable support has good support performance. Advantageous features of the present invention are defined in the corresponding subclaims.

According to the invention, this application provides a foldable support, including:.

It may be understood that, the bottom plate may be an independent carrier structure that can carry a keyboard and a mobile terminal, which may be understood as a stationary part of the foldable support in a closed state, an unfolded state, and an intermediate state between the closed state and the unfolded state.

The first support plate can rotate relative to the bottom plate to the closed state in which the first support plate is fitted with the bottom plate, to enable the foldable support to be in the closed state. When the foldable support is in the closed state, a plane size of the foldable support is relatively small, which is convenient for the user to store and carry. Exemplarily, when the foldable support is in the closed state, the first support plate and the bottom plate can be completely folded to be parallel to each other (where a slight deviation is also allowed). The first support plate can also rotate relative to the bottom plate to be close to each other (folded) or away from each other (unfolded) to the intermediate state, to enable the foldable support to be in the intermediate state, where the intermediate state may be any state between the unfolded state and the closed state. Exemplarily, when the foldable support is in the intermediate state, the included angle between the first support plate and the bottom plate may be <NUM>°, <NUM>°, <NUM>°, or the like. The first support plate can also rotate relative to the bottom plate to the unfolded state, to enable the foldable support to be in the unfolded state, where the unfolded state may be understood as a support state that can provide good support performance for the mobile terminal. When the foldable support is in the unfolded state, the foldable support can be configured to carry and support the mobile terminal. Therefore, the foldable support has an excellent support effect, and has better stability. The mobile terminal may be placed on the first support plate, so that the first support plate provides good retention stability for the mobile terminal. Exemplarily, when the foldable support is in the unfolded state, the included angle between the first support plate and the bottom plate may be <NUM>°, <NUM>°, <NUM>°, or the like.

The second support plate may rotate to a state of being fitted with the first support plate, and may also rotate to a state of being arranged with the first support plate at an included angle to match the external structural member to jointly support the first support plate. By arranging the second support plate and enabling the second support plate to match the external structural member to support the first support plate, when the foldable support is in the unfolded state, the first support plate can open relative to the bottom plate to carry a device such as the mobile terminal, and the second support plate can also open relative to the first support plate and support between the external structural member and the first support plate, so that the second support plate, the first support plate, and the external structural member can jointly form a triangular structure. Because of better stability and a good capability of resisting interference of external environmental factors, the triangular structure is easier to support the device such as the mobile terminal, and can effectively prevent the device from slipping off the foldable support, so that the foldable support can realize better support performance and retention stability.

In addition, by arranging that the second support plate matches the external structural member to support the first support plate, the second support plate can be structurally in a rear support form located behind the first support plate. On the one hand, the support performance of the second support plate can be realized without occupying a plate surface space of the bottom plate, and a problem in which, in the prior art, because a center of gravity of the unfolded state of the foldable support is controlled in an interval where the bottom plate is located, a spatial layout of devices on the bottom plate is compressed to affect an overall support effect and stability of the foldable support can be effectively avoided. On the other hand, a space jointly defined by the first support plate and the bottom plate can be released, and a layout space of the bottom plate can be transferred to a maximum extent, so that more or larger-area devices can be laid on the defined plate surface space of the bottom plate, and a purpose of increasing the operable space that is operated by the user can be realized, which is conducive to improving the space utilization rate of the foldable support.

Based on the above description, it should be understood that, when the foldable support is in the closed state, the first support plate is fitted with the bottom plate, and the second support plate is fitted with the first support plate, so that the foldable support is in a folded state as a whole; and when the foldable support is in the unfolded state, the first support plate and the bottom plate are arranged at an included angle, and the second support plate and the first support plate are also arranged at an included angle, so that the foldable support is in a stretched state as a whole.

The first magnetic member may be an electromagnet, and can generate a magnetic field after power-on. The first magnetic member may be electrically connected to a first circuit when the included angle between the first support plate and the bottom plate is less than the preset angle, so as to generate magnetism that attracts that of the second magnetic member when power-on, thereby enabling the first support plate and the second support plate to be close to each other to be folded. The first magnetic member may also be electrically connected to a second circuit when the included angle between the first support plate and the bottom plate is greater than or equal to the preset angle, so as to generate magnetism that repels that of the second magnetic member when power-on, thereby enabling the first support plate and the second support plate to be away from each other to be unfolded. The preset angle may be <NUM>°, <NUM>°, or the like. The first circuit may be understood as a circuit that can realize attraction between the magnetism of the first magnetic member and the magnetism of the second magnetic member. The second circuit may be understood as a circuit that can realize repulsion between the magnetism of the first magnetic member and the magnetism of the second magnetic member.

That is, the first magnetic member is configured to attract the second magnetic member when the included angle between the first support plate and the bottom plate is less than the preset angle, to enable the second support plate to be fitted with the first support plate. The first magnetic member is further configured to repel the second magnetic member when the included angle between the first support plate and the bottom plate is greater than or equal to the preset angle, to enable the second support plate and the first support plate to be arranged at an included angle.

In other words, when the included angle between the first support plate and the bottom plate is less than the preset angle, the second support plate is fitted with the first support plate, and only the first support plate and the bottom plate are arranged at an included angle. In this case, the foldable support may be in the closed state, and may also be in the intermediate state between the closed state and the unfolded state. When the included angle between the first support plate and the bottom plate is greater than or equal to the preset angle, the second support plate is separated from the first support plate, and the first support plate and the bottom plate, and the first support plate and the second support plate each are arranged at an included angle. In this case, the foldable support may be in the unfolded state, and may also be in the intermediate state between the closed state and the unfolded state.

In a possible implementation, the foldable support further includes a rotary mechanism, the first support plate is rotatably connected to the bottom plate through the rotary mechanism, and the rotary mechanism has a first conductive contact point; and
the first conductive contact point is configured to conduct with the first magnetic member in a case that the included angle between the first support plate and the bottom plate is less than the preset angle, to enable magnetism of the first magnetic member to attract that of the second magnetic member.

It should be noted that, the rotary mechanism may be any rotary shaft mechanism that can realize switching of the magnetism of the first magnetic member and accompanies with a sense of damping, such as a rotary shaft mechanism of a concave gear/cam type, a wrapped rotary shaft mechanism, or a CLIP rotary shaft mechanism, which is not strictly limited in the technical solutions of this application.

In a possible implementation, the foldable support further includes a rotary mechanism, the first support plate is rotatably connected to the bottom plate through the rotary mechanism, and the rotary mechanism has a second conductive contact point; and
the second conductive contact point is configured to conduct with the first magnetic member in a case that the included angle between the first support plate and the bottom plate is the preset angle, to enable magnetism of the first magnetic member to repel that of the second magnetic member.

In a possible implementation, the rotary mechanism includes a first support, a second support, and a first rotary shaft, the first support is connected to the bottom plate, the second support is connected to the first support plate, a first end of the first rotary shaft is connected to the first support, a second end of the first rotary shaft is connected to the second support, and the second support is capable of rotating relative to the first support.

The first support is connected to the bottom plate, so as to be always stationary in the closed state, the unfolded state, and the intermediate state between the closed state and the unfolded state of the foldable support. It should be noted that, a key design of this application does not lie in an implementation form of the connection between the first support and the bottom plate, and a specific structure and a position of the connection between the first support and the bottom plate are not strictly limited.

The first rotary shaft can perform a rotation movement together with the second support, and the first rotary shaft can rotate relative to the first support. The first rotary shaft includes the first end and the second end, the first end is an end of the first rotary shaft connected to the first support, and the second end is an end of the first rotary shaft connected to the second support.

The second support is connected to the first support plate, to synchronously move under driving of the first support plate. The second support is fixedly connected to the first rotary shaft. That is, the second support and the first rotary shaft can realize linkage. When the second support performs a rotation movement, the first rotary shaft is driven to synchronously perform the rotation movement. It should be noted that, a key design of this application does not lie in an implementation form of the connection between the second support and the first support plate, and a specific structure and a position of the connection between the second support and the first support plate are not strictly limited.

In a possible implementation, the rotary mechanism further includes a cam, a shaft sleeve, and a conductive structure, the cam is sleeved to the first end of the first rotary shaft, the cam is capable of being driven by the first rotary shaft to rotate, the shaft sleeve is sleeved to a periphery of the cam, the first conductive contact point and the second conductive contact point are arranged on an inner surface of the shaft sleeve, the conductive structure is connected to a peripheral side surface of the cam, and the conductive structure is configured to conduct with the first conductive contact point or the second conductive contact point.

It may be understood that, the first conductive contact point is electrically connected to the first magnetic member, and the first conductive contact point is electrically connected to the first circuit. The first conductive contact point is configured to conduct with the first magnetic member when the included angle between the first support plate and the bottom plate is less than the preset angle, to enable the magnetism of the first magnetic member to attract that of the second magnetic member. The second conductive contact point is electrically connected to the second magnetic member, and the second conductive contact point is electrically connected to the second circuit. The second conductive contact point is configured to conduct with the first magnetic member when the included angle between the first support plate and the bottom plate is the preset angle, to enable the magnetism of the first magnetic member to repel that of the second magnetic member.

When the first conductive contact point and the second conductive contact point are not in contact with the conductive structure on the cam, because the first conductive contact point and the second conductive contact point are breakpoints, the first circuit and the second circuit cannot conduct. When the cam rotates to that the conductive structure thereon is in contact with the first conductive contact point or the second conductive contact point, the first circuit or the second circuit conducts.

When the first support plate rotates relative to the bottom plate and the included angle between the first support plate and the bottom plate is less than the preset angle, the conductive structure on the cam is in contact with the first conductive contact point to enable the first circuit to conduct, so as to enable the magnetism generated by the first magnetic member to attract the magnetism generated by the second magnetic member, thereby enabling the first support plate to be fitted with the second support plate. When the first support plate rotates relative to the bottom plate and the included angle between the first support plate and the bottom plate is greater than or equal to the preset angle, the conductive structure on the cam is separated from the first conductive contact point and is in contact with the second conductive contact point to enable the second circuit to conduct, so as to enable the magnetism generated by the first magnetic member to repel the magnetism generated by the second magnetic member, thereby enabling the second support plate to open relative to the first support plate, enabling the second support plate, the first support plate, and the external structural member to form a stable support angle, and enabling the foldable support to realize an opened state. When the first support plate rotates again relative to the bottom plate and the included angle between the first support plate and the bottom plate is less than or equal to the preset angle, the conductive structure on the cam is separated from the second conductive contact point and is in contact with the first conductive contact point to enable the first circuit to conduct, so as to enable the magnetism generated by the first magnetic member to attract the magnetism generated by the second magnetic member, thereby enabling the first support plate to be fitted with the second support plate, and enabling the foldable support to realize the closed state.

In a possible implementation, the rotary mechanism further includes a concave gear, the concave gear includes a body and a clamping body connected to the body, the body is sleeved to the first end of the first rotary shaft, and the body is in contact with the cam, and an end of the clamping body away from the body is clamped with the first support.

It may be understood that, in the closed state, the unfolded state, and the intermediate state between the closed state and the unfolded state of the foldable support, the first support is always stationary, and because the cam is clamped with the first support, the cam can be limited to rotating along a circumferential direction of the first rotary shaft under an acting force of the first support, where the circumferential direction of the first rotary shaft is a direction surrounding a central axis of the first rotary shaft. In other words, in a rotating process of the first rotary shaft, because of a clamping relationship with the first support, the cam can be limited to performing a rotation movement together with the first rotary shaft (where slight rotation is also allowed).

In a possible implementation, a protrusion is arranged on the cam, a groove is provided on the body of the concave gear, and the protrusion abuts against the groove.

It may be understood that, the groove can match the protrusion to realize a similar meshing relationship between teeth and teeth, so as to realize close fit between the first support plate and the bottom plate in the closed state of the foldable support, and effectively minimize a possibility of a problem in which the first support plate and the bottom plate are not tightly closed in the closed state of the foldable support because the concave gear is in plane contact with the cam.

In a possible implementation, the rotary mechanism further includes a first elastic member and a fastener, the fastener is fixedly connected to the first end of the first rotary shaft, and the first elastic member is sleeved to the first end of the first rotary shaft, and elastically abuts between the fastener and the cam.

Therefore, the cam can be pushed to be in pressing contact with the concave gear because of good elasticity of the first elastic member, to ensure a damping effect that the cam and the concave gear can realize. It may be understood that, because the structure limits an axial movement and circumferential rotation of the concave gear so that only the cam has an axial movement space, and because the cam and the concave gear are always in good matching and contact, the cam can perform an axial movement along the first rotary shaft to compress or release the first elastic member under an acting force of the concave gear on the cam, thereby improving the damping effect, and improving usage experience of the user when folded.

In the rotating process of the first rotary shaft, the cam generates a relative movement with the concave gear, where the relative movement may be understood as that the cam is squeezed to slide relative to the concave gear along the first rotary shaft, so that an axial distance between the cam and the concave gear changes, to compress the first elastic member to generate a damping force. When the damping force brought by the first elastic member is greater than a gravity thereof, the foldable support may stop at a plurality of angles, that is, the foldable support may hover at different angles.

In a moving process of the cam along an axial direction, because the first elastic member is squeezed by the cam to be in a compressed state, a larger elastic force is applied to an end of the first elastic member away from the cam. Therefore, by arranging the fastener on this end, a problem in which the first elastic member falls off due to an excessive force can be resolved because of good retention stability between the fastener and the first rotary shaft, which is conducive to ensuring that a folding movement of the foldable support does not deflect, thereby having good reliability.

In a possible implementation, the rotary mechanism further includes a fastener sleeved to the first end of the first rotary shaft, a first friction member, and a first elastic member, the fastener is fixedly connected to the first end of the first rotary shaft, the first friction member is located between the fastener and the first elastic member, and the first elastic member elastically abuts between the first friction member and the cam.

It may be understood that, the first friction member can provide friction and damping for a rotating process of the foldable support, which is conducive to improving the rotation reliability of the foldable support. By arranging the first elastic member, the cam can be pushed to be in pressing contact with the concave gear because of good elasticity of the first elastic member, to ensure a damping effect that the cam and the concave gear can realize. It may be understood that, because the structure limits an axial movement and circumferential rotation of the concave gear so that only the cam has an axial movement space, and because the cam and the concave gear are always in good matching and contact, the cam can perform an axial movement along the first rotary shaft to compress or release the first elastic member under an acting force of the concave gear on the cam, thereby improving the damping effect, and improving usage experience of the user when folded.

In a possible implementation, the rotary mechanism further includes a second friction member, and the second friction member is sleeved to the first end of the first rotary shaft, and is located between the concave gear and the first support.

It may be understood that, the second friction member can provide friction and damping for a rotating process of the foldable support, which is conducive to improving the rotation reliability of the foldable support.

In a possible implementation, the first support plate includes a carrying surface and a support surface that face away from each other, the carrying surface is used for carrying a mobile terminal, an accommodation groove is provided on the support surface, and the accommodation groove is used for accommodating at least one part of the second support plate.

It may be understood that, when the accommodation groove is used for receiving a part of the second support plate, the second support plate may protrude relative to a support surface of the first support plate. When the accommodation groove is used for receiving all of the second support plate, a shape of the accommodation groove matches a shape of the second support plate, and a surface of the second support plate exposed to the outside may be flush with the support surface of the first support plate.

In this arrangement, when the foldable support is in the closed state, at least a part or all of the second support plate is located in the accommodation groove of the first support plate, so that the second support plate can present layout arrangement of being inserted into the first support plate, so that the storage of the second support plate can be realized on a basis of not occupying much space, the appearance performance is good, and the miniaturization of the foldable support can be realized more easily. When the foldable support is in the unfolded state, the second support plate can be arranged with the first support plate at an included angle, and abut between the external structural member and the first support plate, to form a support form of a rear support to match the external structural member to support the first support plate. The external structural member may be understood as a structural member that can place the foldable support, such as a book desk, an office desk, a bedside table, or a bed computer desk. When the foldable support is placed on the external structural member and is in the unfolded state, the first support plate, the second support plate, and the external structural member can jointly form a triangular structure, which is conducive to improving the support stability of the foldable support.

In a possible implementation, the foldable support includes a keyboard, and the keyboard is connected to the bottom plate.

It may be understood that, the keyboard is connected to the bottom plate, to provide an operable space for the user through a larger plate surface interval of the bottom plate to a maximum extent, thereby having a high space utilization rate. Exemplarily, the keyboard and the bottom plate may be connected to form an integral structure. The keyboard and the bottom plate may be an integral structure formed in an assembly manner such as welding or bonding, or the keyboard and the bottom plate may also be an integral structure formed by a one-piece molding process. In addition, the keyboard may be connected to the mobile terminal in a wireless manner (such as Bluetooth or a wireless local area network), thereby realizing signal transmission therebetween. Alternatively, the keyboard may also be connected to the mobile terminal in a wired manner, thereby realizing signal transmission therebetween.

In a possible implementation, the foldable support further includes a second elastic member, and the second elastic member is elastically connected between the first support plate and the second support plate. Exemplarily, the second elastic member may be an elastic cloth.

It may be understood that, because the second elastic member is arranged between the first support plate and the second support plate, when the first support plate rotates relative to the bottom plate until the included angle between the first support plate and the bottom plate is the preset angle, the first support plate can continue to rotate relative to the bottom plate because of an elastic force of the second elastic member, so that the included angle between the first support plate and the bottom plate further increases, so as to adapt to a change of a viewing angle of the user when the mobile terminal is placed on the foldable support. In this implementation, when the first support plate rotates again relative to the bottom plate and the included angle between the first support plate and the bottom plate is less than or equal to the preset angle, the second elastic member has no elastic force, and the foldable support gradually realizes the closed state.

According to a second aspect, this application further includes an electronic device, the electronic device includes a mobile terminal and the foldable support described above, and the mobile terminal is connected to the foldable support.

For ease of understanding, terms related on which the embodiments of this application are first described:
The term "and/or" describes only an association relationship for describing associated objects and represents that three relationships may exist.

The term "a plurality of" refers to two or more.

The term "connection" should be understood in a broad sense. For example, a connection between A and B may be a direct connection between A and B, or an indirect connection between A and B by using an intermediary.

The following describes the specific implementations of this application in detail with reference to the accompanying drawings.

With the development of technologies, electronic devices such as tablet computers and mobile phones are favored by more and more people because of the portability thereof. A foldable support is configured to place a tablet computer or a mobile phone, which can facilitate people to use the tablet computer or the mobile phone more conveniently. The foldable support needs to have a larger operable space, so as to improve usage experience of a user.

Based on this, referring to <FIG>, the embodiments of this application provide a foldable support <NUM> and an electronic device <NUM> to which the foldable support <NUM> is applied, which can increase an operable space that can be operated by the user on a basis of ensuring that the foldable support <NUM> has good support performance. Description is described below in detail.

Referring to <FIG>, the electronic device <NUM> may include the foldable support <NUM> and a mobile terminal <NUM>. The foldable support <NUM> can realize unfolding and closing under an operation of the user. When the foldable support <NUM> is in a closed state, a space occupied by the foldable support <NUM> decreases, which is convenient for storage. When the foldable support <NUM> is in an unfolded state, good support stability can be provided. The mobile terminal <NUM> is connected to the foldable support <NUM>, so as to provide excellent retention stability for the mobile terminal <NUM> through good support performance of the foldable support <NUM>. The mobile terminal <NUM> may be, but is not limited to, a tablet computer, a mobile phone, an e-book reader, and the like.

Exemplarily, a connection form between the mobile terminal <NUM> and the foldable support <NUM> may be magnetic connection, or the connection form between the mobile terminal <NUM> and the foldable support <NUM> may be clamping connection, or the connection form between the mobile terminal <NUM> and the foldable support <NUM> may be bonding. The connection form between the mobile terminal <NUM> and the foldable support <NUM> is not strictly limited in the embodiments of this application.

Referring to <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, and <FIG>, the foldable support <NUM> includes a bottom plate <NUM>, a keyboard <NUM>, a rotary mechanism <NUM>, a first support plate <NUM>, a second support plate <NUM>, a first magnetic member <NUM>, and a second magnetic member <NUM>.

It should be noted that, a purpose of <FIG> is only for exemplarily describing connection relationships of the bottom plate <NUM>, the keyboard <NUM>, the rotary mechanism <NUM>, the first support plate <NUM>, the second support plate <NUM>, the first magnetic member <NUM>, and the second magnetic member <NUM>, and is not intended to specifically limit a connecting position, a specific structure, and a quantity of each device. The structure shown in the embodiments of this application does not constitute a specific limitation on the foldable support <NUM>. In some other embodiments of this application, the foldable support <NUM> may include more or fewer components than those shown in the figure, or some components may be combined, or some components may be split, or components are arranged in different manners. The components shown in the figure may be implemented by hardware, software, or a combination of software and hardware.

Referring to <FIG> and <FIG>, the bottom plate <NUM> may be an independent carrier structure that can carry the keyboard <NUM> and the mobile terminal <NUM>, which may be understood as a stationary part of the foldable support <NUM> in a closed state, an unfolded state, and an intermediate state between the closed state and the unfolded state.

The keyboard <NUM> is connected to the bottom plate <NUM>, to provide an operable space for the user through a larger plate surface interval of the bottom plate <NUM> to a maximum extent, thereby having a high space utilization rate. Exemplarily, the keyboard <NUM> and the bottom plate <NUM> may be connected to form an integral structure. The keyboard <NUM> and the bottom plate <NUM> may be an integral structure formed in an assembly manner such as welding or bonding, or the keyboard <NUM> and the bottom plate <NUM> may also be an integral structure formed by a one-piece molding process. In addition, the keyboard <NUM> may be connected to the mobile terminal <NUM> in a wireless manner (such as Bluetooth or a wireless local area network), thereby realizing signal transmission therebetween. Alternatively, the keyboard <NUM> may also be connected to the mobile terminal <NUM> in a wired manner, thereby realizing signal transmission therebetween.

The rotary mechanism <NUM> is connected between the bottom plate <NUM> and the first support plate <NUM>, and the rotary mechanism <NUM> may enable the first support plate <NUM> to rotate relative to the bottom plate <NUM> to a closed state shown in <FIG> in which the first support plate <NUM> is fitted with the bottom plate <NUM>, or enable the first support plate <NUM> to rotate relative to the bottom plate <NUM> to an unfolded state shown in <FIG> in which the first support plate <NUM> and the bottom plate <NUM> are arranged at an included angle, or enable the first support plate <NUM> to rotate relative to the bottom plate <NUM> to an intermediate state between the closed state and the unfolded state shown in <FIG>, thereby realizing the folding performance of the foldable support <NUM>.

The first support plate <NUM> is connected to the bottom plate <NUM> through the rotary mechanism <NUM>, and the first support plate <NUM> can rotate relative to the bottom plate <NUM>, so as to enable the first support plate <NUM> and the bottom plate <NUM> to be arranged at an included angle, where the included angle may be in an angle range of <NUM>° to <NUM>° (including endpoint values <NUM>° and <NUM>°). Specifically, as shown in <FIG>, the first support plate <NUM> can rotate relative to the bottom plate <NUM> to the closed state in which the first support plate <NUM> is fitted with the bottom plate <NUM>, to enable the foldable support <NUM> to be in the closed state. When the foldable support <NUM> is in the closed state, a plane size of the foldable support <NUM> is relatively small, which is convenient for the user to store and carry. Exemplarily, when the foldable support <NUM> is in the closed state, the first support plate <NUM> and the bottom plate <NUM> can be completely folded to be parallel to each other (where a slight deviation is also allowed).

As shown in <FIG>, the first support plate <NUM> can also rotate relative to the bottom plate <NUM> to be close to each other (folded) or away from each other (unfolded) to the intermediate state, to enable the foldable support <NUM> to be in the intermediate state, where the intermediate state may be any state between the unfolded state and the closed state. Exemplarily, when the foldable support <NUM> is in the intermediate state, the included angle between the first support plate <NUM> and the bottom plate <NUM> may be <NUM>°, <NUM>°, <NUM>°, or the like.

As shown in <FIG> and <FIG>, the first support plate <NUM> can also rotate relative to the bottom plate <NUM> to the unfolded state, to enable the foldable support <NUM> to be in the unfolded state, where the unfolded state may be understood as a support state that can provide good support performance for the mobile terminal <NUM>. When the foldable support <NUM> is in the unfolded state, the foldable support <NUM> can be configured to carry and support the mobile terminal <NUM>. Therefore, the foldable support <NUM> has an excellent support effect, and has better stability. The mobile terminal <NUM> may be placed on the first support plate <NUM>, so that the first support plate <NUM> provides good retention stability for the mobile terminal. Exemplarily, when the foldable support <NUM> is in the unfolded state, the included angle between the first support plate <NUM> and the bottom plate <NUM> may be <NUM>°, <NUM>°, <NUM>°, or the like.

Based on the above description, it should be understood that, the foldable support <NUM> can be switched between the unfolded state and the closed state, and maintained in the unfolded state and the closed state.

Referring to <FIG> and <FIG>, the first support plate <NUM> includes a carrying surface <NUM> and a support surface <NUM> that face away from each other. The carrying surface <NUM> may be understood as a surface of the first support plate <NUM> that has a larger contact area with the mobile terminal <NUM> when the foldable support <NUM> is in the unfolded state, or may be understood as a surface of the first support plate <NUM> that has a larger contact area with the bottom plate <NUM> when the foldable support <NUM> is in the closed state. The support surface <NUM> may be understood as a surface of the first support plate <NUM> that is directly supported by the second support plate <NUM> when the foldable support <NUM> is in the unfolded state, or may be understood as a surface of the first support plate <NUM> that can accommodate at least a part of the second support plate when the foldable support <NUM> is in the closed state.

Specifically, an accommodation groove <NUM> is concavely provided on the support surface <NUM> of the first support plate <NUM>, the accommodation groove <NUM> is arranged close to the bottom plate <NUM>, and the accommodation groove <NUM> can be used for accommodating a part or all of the second support plate <NUM>. When the accommodation groove <NUM> is used for receiving a part of the second support plate <NUM>, the second support plate <NUM> may protrude relative to a support surface <NUM> of the first support plate <NUM>. When the accommodation groove <NUM> is used for receiving all of the second support plate <NUM>, a shape of the accommodation groove <NUM> matches a shape of the second support plate <NUM>, and a surface of the second support plate <NUM> exposed to the outside may be flush with the support surface <NUM> of the first support plate <NUM>.

In this arrangement, as shown in <FIG>, when the foldable support <NUM> is in the closed state, at least a part or all of the second support plate <NUM> is located in the accommodation groove <NUM> of the first support plate <NUM>, so that the second support plate <NUM> can present layout arrangement of being inserted into the first support plate <NUM>, so that the storage of the second support plate <NUM> can be realized on a basis of not occupying much space, the appearance performance is good, and the miniaturization of the foldable support <NUM> can be realized more easily. When the foldable support <NUM> is in the unfolded state, as shown in <FIG>, the second support plate <NUM> can be arranged with the first support plate <NUM> at an included angle, and abut between an external structural member and the first support plate <NUM>, to form a support form of a rear support to match the external structural member to support the first support plate <NUM>. The external structural member may be understood as a structural member that can place the foldable support <NUM>, such as a book desk, an office desk, a bedside table, or a bed computer desk. When the foldable support <NUM> is placed on the external structural member and is in the unfolded state, the first support plate <NUM>, the second support plate <NUM>, and the external structural member can jointly form a triangular structure, which is conducive to improving the support stability of the foldable support <NUM>.

Referring to <FIG> and <FIG>, the second support plate <NUM> may be connected to the first support plate <NUM> through a second rotary shaft, the second support plate <NUM> can rotate relative to the first support plate <NUM>, and the second support plate <NUM> may be configured to match the external structural member to support the first support plate <NUM>. That is, the second support plate <NUM> may rotate to a state of being fitted with the first support plate <NUM>, and may also rotate to a state of being arranged with the first support plate <NUM> at an included angle to match the external structural member to jointly support the first support plate <NUM>.

In a possible implementation, a limit block may be arranged on the second rotary shaft, to limit a rotation angle of the second support plate <NUM> relative to the first support plate <NUM>, thereby ensuring the support performance of the foldable support <NUM>.

It should be noted that, a size of the second support plate <NUM> may be set as small as possible on a basis of the good support performance. In addition, an angle range of the included angle between the second support plate <NUM> and the first support plate <NUM> is not strictly limited in the embodiments of this application, and an angle range of the triangular structure formed by the second support plate <NUM>, the first support plate <NUM>, and the external structural member in the unfolded state of the foldable support <NUM> can all fall into the protection scope of the embodiments of this application.

By arranging the second support plate <NUM> and enabling the second support plate <NUM> to match the external structural member to support the first support plate <NUM>, when the foldable support <NUM> is in the unfolded state, the first support plate <NUM> can open relative to the bottom plate <NUM> to carry a device such as the mobile terminal <NUM>, and the second support plate <NUM> can also open relative to the first support plate <NUM> and support between the external structural member and the first support plate <NUM>, so that the second support plate <NUM>, the first support plate <NUM>, and the external structural member can jointly form a triangular structure. Because of better stability and a good capability of resisting interference of external environmental factors, the triangular structure is easier to support the device such as the mobile terminal <NUM>, and can effectively prevent the device from slipping off the foldable support <NUM>, so that the foldable support <NUM> can realize better support performance and retention stability.

In addition, by arranging that the second support plate <NUM> matches the external structural member to support the first support plate <NUM>, the second support plate <NUM> can be structurally in a rear support form located behind the first support plate <NUM>. On the one hand, the support performance of the second support plate <NUM> can be realized without occupying a plate surface space of the bottom plate <NUM>, and a problem in which, in the prior art, because a center of gravity of the unfolded state of the foldable support <NUM> is controlled in an interval where the bottom plate <NUM> is located, a spatial layout of devices on the bottom plate <NUM> is compressed to affect an overall support effect and stability of the foldable support <NUM> can be effectively avoided. On the other hand, a space jointly defined by the first support plate <NUM> and the bottom plate <NUM> can be released, and a layout space of the bottom plate <NUM> can be transferred to a maximum extent, so that more or larger-area devices can be laid on the defined plate surface space of the bottom plate <NUM>, and a purpose of increasing the operable space that is operated by the user can be realized, which is conducive to improving the space utilization rate of the foldable support <NUM>.

Based on the above description, it should be understood that, when the foldable support <NUM> is in the closed state, the first support plate <NUM> is fitted with the bottom plate <NUM>, and the second support plate <NUM> is fitted with the first support plate <NUM>, so that the foldable support <NUM> is in a folded state as a whole; and when the foldable support <NUM> is in the unfolded state, the first support plate <NUM> and the bottom plate <NUM> are arranged at an included angle, and the second support plate <NUM> and the first support plate are also arranged at an included angle, so that the foldable support <NUM> is in a stretched state as a whole.

Referring to <FIG> and <FIG>, the first magnetic member <NUM> is arranged on the first support plate <NUM>. Specifically, a first groove <NUM> may be provided on the support surface <NUM> of the first support plate <NUM>, the first groove <NUM> may be located on a bottom wall of the accommodation groove <NUM>, and the first magnetic member <NUM> is received in the first groove <NUM>. That is, the first groove <NUM> is concavely provided on the bottom wall of the accommodation groove <NUM>, so that the receiving of the accommodation groove <NUM> for the second support plate <NUM> is not affected while the first groove <NUM> receives the first magnetic member <NUM>, thereby having good reliability.

It should be noted that, the first magnetic member <NUM> may be in any shape that can realize work performance, such as a strip shape, or a column shape. The shape of the first magnetic member <NUM> is not strictly limited in the embodiments of this application.

The first magnetic member <NUM> may be an electromagnet, which can generate a magnetic field after power-on. The first magnetic member <NUM> may be electrically connected to a first circuit (not shown in the figures) when the included angle between the first support plate <NUM> and the bottom plate <NUM> is less than a preset angle, so as to generate magnetism that attracts that of the second magnetic member <NUM> when power-on, thereby enabling the first support plate <NUM> and the second support plate <NUM> to be close to each other to be folded. The first magnetic member <NUM> may also be electrically connected to a second circuit (not shown in the figures) when the included angle between the first support plate <NUM> and the bottom plate <NUM> is greater than or equal to the preset angle, so as to generate magnetism that repels that of the second magnetic member <NUM> when power-on, thereby enabling the first support plate <NUM> and the second support plate <NUM> to be away from each other to be unfolded. The preset angle may be <NUM>°, <NUM>°, or the like. The first circuit may be understood as a circuit that can realize attraction between the magnetism of the first magnetic member <NUM> and the magnetism of the second magnetic member <NUM>. The second circuit may be understood as a circuit that can realize repulsion between the magnetism of the first magnetic member <NUM> and the magnetism of the second magnetic member <NUM>.

That is, the first magnetic member <NUM> is configured to attract the second magnetic member <NUM> when the included angle between the first support plate <NUM> and the bottom plate <NUM> is less than the preset angle, to enable the second support plate <NUM> to be fitted with the first support plate <NUM>. The first magnetic member <NUM> is further configured to repel the second magnetic member <NUM> when the included angle between the first support plate <NUM> and the bottom plate <NUM> is greater than or equal to the preset angle, to enable the second support plate <NUM> and the first support plate <NUM> to be arranged at an included angle.

In other words, when the included angle between the first support plate <NUM> and the bottom plate <NUM> is less than the preset angle, the second support plate <NUM> is fitted with the first support plate <NUM>, and only the first support plate <NUM> and the bottom plate <NUM> are arranged at an included angle. In this case, the foldable support <NUM> may be in the closed state, and may also be in the intermediate state between the closed state and the unfolded state. When the included angle between the first support plate <NUM> and the bottom plate <NUM> is greater than or equal to the preset angle, the second support plate <NUM> is separated from the first support plate <NUM>, and the first support plate <NUM> and the bottom plate <NUM>, and the first support plate <NUM> and the second support plate <NUM> each are arranged at an included angle. In this case, the foldable support <NUM> may be in the unfolded state, and may also be in the intermediate state between the closed state and the unfolded state.

In a specific application scenario, the first magnetic member <NUM> includes a first magnetic pole and a second magnetic pole, the first magnetic pole is a magnetic pole facing the second magnetic member <NUM> in the first magnetic member <NUM>, and the second magnetic pole is a magnetic pole away from the second magnetic member <NUM> in the first magnetic member <NUM>. The second magnetic member <NUM> includes a third magnetic pole and a fourth magnetic pole, the third magnetic pole is a magnetic pole facing the first magnetic member <NUM> in the second magnetic member <NUM>, and the fourth magnetic pole is a magnetic pole away from the first magnetic member <NUM> in the second magnetic member <NUM>. The third magnetic pole is an S-pole, and the fourth magnetic pole is an N-pole. When the included angle between the first support plate <NUM> and the bottom plate <NUM> is less than the preset angle, the first magnetic pole is the S-pole, and the second magnetic pole is the N-pole, so that the first magnetic member <NUM> and the second magnetic member <NUM> attract each other because of attraction of opposite poles, thereby enabling the first support plate <NUM> and the second support plate <NUM> to be close to each other to be folded. When the included angle between the first support plate <NUM> and the bottom plate <NUM> is greater than or equal to the preset angle, polarities of the first magnetic pole and the second magnetic pole are opposite to each other so that the first magnetic pole is the N-pole and the second magnetic pole is the S-pole, so that the first magnetic member <NUM> and the second magnetic member <NUM> repel each other because of repulsion of like poles, thereby enabling the first support plate <NUM> and the second support plate <NUM> to be away from each other to be unfolded.

Referring to <FIG> and <FIG>, the second magnetic member <NUM> is arranged on the second support plate <NUM>. Specifically, a second groove <NUM> may be provided on a surface of the second support plate <NUM> opposite to the accommodation groove <NUM>, and the second magnetic member <NUM> is received in the second groove <NUM>, so that the second support plate <NUM> has work performance of receiving the second magnetic member <NUM> while the second support plate <NUM> being received in the accommodation groove <NUM> is not affected, thereby having better aesthetics. The second magnetic member <NUM> may be a magnet. It should be noted that, the second magnetic member <NUM> may be in any shape that can realize work performance, such as a strip shape, or a column shape. The shape of the second magnetic member <NUM> is not strictly limited in the embodiments of this application.

Positions of the second magnetic member <NUM> and the first magnetic member <NUM> are arranged correspondingly, so that a good interaction force can exist between the first magnetic member <NUM> and the second magnetic member <NUM>. The interaction force may include an attraction force when the first magnetic member <NUM> and the second magnetic member <NUM> attract each other, and may also include a repulsion force when the first magnetic member <NUM> and the second magnetic member <NUM> repel each other. Exemplarily, the first magnetic member <NUM> may be located on a position close to the second rotary shaft, that is, the second magnetic member <NUM> may be located on a position close to the second rotary shaft. In this arrangement, the magnetic member and the rotary mechanism <NUM> can be independent from each other due to a specific distance therebetween, so as to effectively avoid a problem of interference due to an excessively short distance therebetween, thereby having good reliability.

Based on the above description, it should be understood that, the magnetism of the first magnetic member <NUM> may change. A structure of the rotary mechanism <NUM> is described below with reference to <FIG>, and <FIG> to <FIG>, to explain a principle that the magnetism of the first magnetic member <NUM> changes.

Referring to <FIG>, <FIG>, and <FIG>, the rotary mechanism <NUM> includes a first support <NUM>, a first rotary shaft <NUM>, a second support <NUM>, a conductive structure <NUM>, and a damping structure <NUM>. The damping structure <NUM> includes a second friction member <NUM>, a concave gear <NUM>, a cam <NUM>, a first elastic member <NUM>, a first friction member <NUM>, a fastener <NUM>, and a shaft sleeve <NUM> that are successively sleeved to the first rotary shaft <NUM>.

The first support <NUM> is connected to the bottom plate <NUM>, so as to be always stationary in the closed state, the unfolded state, and the intermediate state between the closed state and the unfolded state of the foldable support <NUM>. It should be noted that, a key design of this application does not lie in an implementation form of the connection between the first support <NUM> and the bottom plate <NUM>, and a specific structure and a position of the connection between the first support <NUM> and the bottom plate <NUM> are not strictly limited.

The first support <NUM> includes a fixing plate <NUM> and a boss <NUM>, and the boss <NUM> is protruded on the fixing plate <NUM>. An end of the boss <NUM> away from the fixing plate <NUM> is provided with a first through hole <NUM> through which the first rotary shaft <NUM> can pass, and the first through hole <NUM> may be a circular hole. An end of the boss <NUM> close to the fixing plate <NUM> is provided with a clamping slot <NUM> on which the concave gear <NUM> can be clamped. A shape of the clamping slot <NUM> may match that of a structure that is to-be-clamped on the concave gear <NUM>, so as to ensure the stability and reliability of the connection between the concave gear <NUM> and the first support <NUM>.

The first rotary shaft <NUM> can perform a rotation movement together with the second support <NUM>, and the first rotary shaft <NUM> can rotate relative to the first support <NUM>. The first rotary shaft <NUM> includes a first end <NUM> and a second end <NUM>, the first end <NUM> is an end of the first rotary shaft <NUM> connected to the first support <NUM>, and the second end <NUM> is an end of the first rotary shaft <NUM> connected to the second support <NUM>. The first end <NUM> of the first rotary shaft <NUM> passes through the first through hole <NUM> of the boss <NUM>, and the first end <NUM> of the first rotary shaft <NUM> protrudes and extends relative to the boss <NUM>, so as to realize that a connection relationship between another structural member of the rotary mechanism <NUM> and the first end <NUM> of the first rotary shaft <NUM> is not affected on a basis of a connection relationship between the first rotary shaft <NUM> and the first support <NUM>. In this embodiment of this application, the first end <NUM> of the first rotary shaft <NUM> may be in a shape of a flat shaft, where a cross-sectional shape of the flat shaft is an ellipse-like shape.

The second end <NUM> of the first rotary shaft <NUM> may be detachably connected to the second support <NUM>. The detachable connection manner can facilitate that the second support <NUM> and the first rotary shaft <NUM> are assembled together when needing to be connected, and can separate them from each other when the second support <NUM> and/or the first rotary shaft <NUM> need to be repaired or replaced. In this way, disassembly and assembly are quick and convenient, and maintenance is convenient, which is conducive to improving the maintenance efficiency. Exemplarily, the detachable connection manner between the second end <NUM> of the first rotary shaft <NUM> and the second support <NUM> may be, but is not limited to, screw connection, snap connection, and the like. Certainly, the second end <NUM> of the first rotary shaft <NUM> may also be welded to the second support <NUM>, which is not strictly limited.

The second support <NUM> is connected to the first support plate <NUM>, to synchronously move under driving of the first support plate <NUM>. The second support <NUM> is fixedly connected to the first rotary shaft <NUM>. That is, the second support <NUM> and the first rotary shaft <NUM> can realize linkage. When the second support <NUM> performs a rotation movement, the first rotary shaft <NUM> is driven to synchronously perform the rotation movement. It should be noted that, a key design of this application does not lie in an implementation form of the connection between the second support <NUM> and the first support plate <NUM>, and a specific structure and a position of the connection between the second support <NUM> and the first support plate <NUM> are not strictly limited.

The second friction member <NUM> is annular and is sleeved to the first end <NUM> of the first rotary shaft <NUM>. Opposite surfaces of the second friction member <NUM> abut against the boss <NUM> and the cam <NUM> of the first support <NUM> respectively. The second friction member <NUM> can provide friction and damping for a rotating process of the foldable support <NUM>, which is conducive to improving the rotation reliability of the foldable support <NUM>.

Referring to <FIG>, <FIG>, the concave gear <NUM> includes a body <NUM> and a clamping body <NUM>. The body <NUM> is annular and is sleeved to the first end <NUM> of the first rotary shaft <NUM>, and a surface of the body <NUM> abuts against the second friction member <NUM>, so that the second friction member <NUM> presents structural arrangement of being located between the concave gear <NUM> and the first support <NUM>. Another surface of the body <NUM> away from the second friction member <NUM> is in contact with the cam <NUM>, and a groove <NUM> is provided on the surface. The groove <NUM> can match a corresponding structure on the cam <NUM> to realize a similar meshing relationship between teeth and teeth, so as to realize close fit between the first support plate <NUM> and the bottom plate <NUM> in the closed state of the foldable support <NUM>, and effectively minimize a possibility of a problem in which the first support plate <NUM> and the bottom plate <NUM> are not tightly closed in the closed state of the foldable support <NUM> because the concave gear <NUM> is in plane contact with the cam <NUM>. Exemplarily, a quantity of grooves <NUM> may be two, and the two grooves <NUM> are oppositely arranged on the surface of the body <NUM> away from the second friction member <NUM>.

An end of the clamping body <NUM> is connected to the body <NUM>, and another end of the clamping body <NUM> away from the body <NUM> is connected to the clamping slot <NUM> of the boss <NUM>, so as to realize clamping between the cam <NUM> and the first support <NUM>. It may be understood that, in the closed state, the unfolded state, and the intermediate state between the closed state and the unfolded state of the foldable support <NUM>, the first support <NUM> is always stationary, and because the cam <NUM> is clamped with the first support <NUM>, the cam <NUM> can be limited to rotating along a circumferential direction of the first rotary shaft <NUM> under an acting force of the first support <NUM>, where the circumferential direction of the first rotary shaft <NUM> is a direction surrounding a central axis of the first rotary shaft <NUM>. In other words, in a rotating process of the first rotary shaft <NUM>, because of a clamping relationship with the first support <NUM>, the cam <NUM> can be limited to performing a rotation movement together with the first rotary shaft <NUM> (where slight rotation is also allowed).

Referring to <FIG>, <FIG>, <FIG>, and <FIG>, the cam <NUM> is annular and is sleeved to the first end <NUM> of the first rotary shaft <NUM>, a surface of the cam <NUM> is in contact with the concave gear <NUM>, and another surface of the cam <NUM> is in contact with the first elastic member <NUM>. A hole in the center of the cam <NUM> matches a shape of the first end <NUM> of the first rotary shaft <NUM> to present an ellipse-like shape. In this arrangement, the cam <NUM> can be driven in the rotating process of the first rotary shaft <NUM> to perform a rotation movement together. A protrusion <NUM> is arranged on a surface of the cam <NUM> in contact with the concave gear <NUM> (where the protrusion <NUM> is the corresponding structure on the cam <NUM>). The protrusion <NUM> abuts against the groove <NUM> to realize the similar meshing relationship between teeth and teeth, so as to realize close fit between the first support plate <NUM> and the bottom plate <NUM> in the closed state of the foldable support <NUM>, and effectively minimize the possibility of the problem in which the first support plate <NUM> and the bottom plate <NUM> are not tightly closed in the closed state of the foldable support <NUM> because the concave gear <NUM> is in plane contact with the cam <NUM>. Exemplarily, a quantity of protrusions <NUM> may be two, and the two protrusions <NUM> are oppositely arranged on a surface of the cam <NUM> facing the concave gear <NUM>.

The first elastic member <NUM> is sleeved to the first end <NUM> of the first rotary shaft <NUM> and elastically abuts between the cam <NUM> and the first friction member <NUM>. Exemplarily, the first elastic member <NUM> may be a disc spring, or the first elastic member <NUM> may be a spring. Therefore, the cam <NUM> can be pushed to be in pressing contact with the concave gear <NUM> because of good elasticity of the first elastic member <NUM>, to ensure a damping effect that the cam <NUM> and the concave gear <NUM> can realize. It may be understood that, because the structure limits an axial movement and circumferential rotation of the concave gear <NUM> so that only the cam <NUM> has an axial movement space, and because the cam <NUM> and the concave gear <NUM> are always in good matching and contact, the cam <NUM> can perform an axial movement along the first rotary shaft <NUM> to compress or release the first elastic member <NUM> under an acting force of the concave gear <NUM> on the cam <NUM>, thereby improving the damping effect, and improving usage experience of the user when folded.

In the rotating process of the first rotary shaft <NUM>, the cam <NUM> generates a relative movement with the concave gear <NUM>, where the relative movement may be understood as that the cam <NUM> is squeezed to slide relative to the concave gear <NUM> along the first rotary shaft <NUM>, so that an axial distance between the cam <NUM> and the concave gear <NUM> changes, to compress the first elastic member <NUM> to generate a damping force. When the damping force brought by the first elastic member <NUM> is greater than a gravity thereof, the foldable support <NUM> may stop at a plurality of angles, that is, the foldable support <NUM> may hover at different angles.

The first friction member <NUM> is annular and is sleeved to the first end <NUM> of the first rotary shaft <NUM>. Opposite surfaces of the first friction member <NUM> abut against the first elastic member <NUM> and the fastener <NUM> respectively, that is, the first friction member <NUM> is located between the first elastic member <NUM> and the fastener <NUM>. The first friction member <NUM> can provide friction and damping for a rotating process of the foldable support <NUM>, which is conducive to improving the rotation reliability of the foldable support <NUM>. It should be noted that, in the embodiments of this application, the first friction member <NUM> may not be arranged. Therefore, the first elastic member <NUM> may directly abut between the cam <NUM> and the fastener <NUM>.

The fastener <NUM> is sleeved to the first end <NUM> of the first rotary shaft <NUM>. The fastener <NUM> is fixedly connected to the first end <NUM> of the first rotary shaft <NUM>, and abuts against the first elastic member <NUM>. Exemplarily, the fastener <NUM> may be a fastening nut, which may be locked on the first end <NUM> of the first rotary shaft <NUM>. It may be understood that, in a moving process of the cam <NUM> along an axial direction, because the first elastic member <NUM> is squeezed by the cam <NUM> to be in a compressed state, a larger elastic force is applied to an end of the first elastic member <NUM> away from the cam <NUM>. Therefore, by arranging the fastener <NUM> on this end, a problem in which the first elastic member <NUM> falls off due to an excessive force can be resolved because of good retention stability between the fastener <NUM> and the first rotary shaft <NUM>, which is conducive to ensuring that a folding movement of the foldable support <NUM> does not deflect, thereby having good reliability.

Referring to <FIG>, <FIG>, and <FIG>, the conductive structure <NUM> is connected to a peripheral side surface of the cam <NUM>, and may follow the rotation of the cam <NUM> to perform a rotation movement together, and the conductive structure <NUM> may be electrically connected to the first circuit or the second circuit, to realize corresponding functions of the first circuit and the second circuit. Exemplarily, the conductive structure <NUM> may be connected to the cam <NUM> by bonding, welding, or the like.

The shaft sleeve <NUM> is in a shape of a hollow sleeve, and is sleeved to peripheries of the first friction member <NUM>, the first elastic member <NUM>, the cam <NUM>, the concave gear <NUM>, and the second friction member <NUM>. The shaft sleeve <NUM> can enable internal structural members thereof to be not disturbed by external environmental factors, thereby having good protection performance. A first conductive contact point and a second conductive contact point are arranged on an internal surface of the shaft sleeve <NUM>, and both the first conductive contact point and the second conductive contact point can conduct with the conductive structure <NUM>. There is an interval between the first conductive contact point and the second conductive contact point, that is, the first conductive contact point and the second conductive contact point are arranged on the internal surface of the shaft sleeve <NUM> at the interval.

It may be understood that, the first conductive contact point is electrically connected to the first magnetic member <NUM>, and the first conductive contact point is electrically connected to the first circuit. The first conductive contact point is configured to conduct with the first magnetic member <NUM> when the included angle between the first support plate <NUM> and the bottom plate <NUM> is less than the preset angle, to enable the magnetism of the first magnetic member <NUM> to attract that of the second magnetic member <NUM>. The second conductive contact point is electrically connected to the second magnetic member <NUM>, and the second conductive contact point is electrically connected to the second circuit. The second conductive contact point is configured to conduct with the first magnetic member <NUM> when the included angle between the first support plate <NUM> and the bottom plate <NUM> is the preset angle, to enable the magnetism of the first magnetic member <NUM> to repel that of the second magnetic member <NUM>.

When the first conductive contact point and the second conductive contact point are not in contact with the conductive structure <NUM> on the cam <NUM>, because the first conductive contact point and the second conductive contact point are breakpoints, the first circuit and the second circuit cannot conduct. When the cam <NUM> rotates to that the conductive structure <NUM> thereon is in contact with the first conductive contact point or the second conductive contact point, the first circuit or the second circuit conducts.

When the first support plate <NUM> rotates relative to the bottom plate <NUM> and the included angle between the first support plate <NUM> and the bottom plate <NUM> is less than the preset angle, the conductive structure <NUM> on the cam <NUM> is in contact with the first conductive contact point to enable the first circuit to conduct, so as to enable the magnetism generated by the first magnetic member <NUM> to attract the magnetism generated by the second magnetic member <NUM>, thereby enabling the first support plate <NUM> to be fitted with the second support plate <NUM>. When the first support plate <NUM> rotates relative to the bottom plate <NUM> and the included angle between the first support plate <NUM> and the bottom plate <NUM> is greater than or equal to the preset angle, the conductive structure <NUM> on the cam <NUM> is separated from the first conductive contact point and is in contact with the second conductive contact point to enable the second circuit to conduct, so as to enable the magnetism generated by the first magnetic member <NUM> to repel the magnetism generated by the second magnetic member <NUM>, thereby enabling the second support plate <NUM> to open relative to the first support plate <NUM>, enabling the second support plate <NUM>, the first support plate <NUM>, and the external structural member to form a stable support angle, and enabling the foldable support <NUM> to realize an opened state. When the first support plate <NUM> rotates again relative to the bottom plate <NUM> and the included angle between the first support plate <NUM> and the bottom plate <NUM> is less than or equal to the preset angle, the conductive structure <NUM> on the cam <NUM> is separated from the second conductive contact point and is in contact with the first conductive contact point to enable the first circuit to conduct, so as to enable the magnetism generated by the first magnetic member <NUM> to attract the magnetism generated by the second magnetic member <NUM>, thereby enabling the first support plate <NUM> to be fitted with the second support plate <NUM>, and enabling the foldable support <NUM> to realize the closed state.

In a possible implementation, as shown in <FIG>, the foldable support <NUM> may further include a second elastic member <NUM>, and the second elastic member <NUM> is elastically connected between the first support plate <NUM> and the second support plate <NUM>. Exemplarily, the second elastic member <NUM> may be an elastic cloth.

Claim 1:
A foldable support (<NUM>), comprising:
a bottom plate (<NUM>);
a first support plate (<NUM>) and a second support plate (<NUM>), wherein the first support plate (<NUM>) is connected to the bottom plate, the first support plate (<NUM>) is capable of rotating relative to the bottom plate, the second support plate (<NUM>) is connected to the first support plate (<NUM>), the second support plate (<NUM>) is capable of rotating relative to the first support plate (<NUM>), and the second support plate (<NUM>) is configured to match an external structural member to support the first support plate (<NUM>); and
a first magnetic member (<NUM>) and a second magnetic member (<NUM>), wherein the first magnetic member (<NUM>) is arranged on the first support plate (<NUM>), the second magnetic member (<NUM>) is arranged on the second support plate (<NUM>), and the first magnetic member (<NUM>) is configured to attract the second magnetic member (<NUM>) in a case that an included angle between the first support plate (<NUM>) and the bottom plate is less than a preset angle, to enable the second support plate (<NUM>) to be fitted with the first support plate (<NUM>); and the first magnetic member (<NUM>) is further configured to repel the second magnetic member (<NUM>) in a case that the included angle between the first support plate (<NUM>) and the bottom plate is greater than or equal to the preset angle, to enable the second support plate (<NUM>) and the first support plate (<NUM>) to be arranged at an included angle; and
a rotary mechanism (<NUM>), the first support plate (<NUM>) is rotatably connected to the bottom plate through the rotary mechanism (<NUM>), characterized in that the rotary mechanism (<NUM>) has a first conductive contact point; and
the first conductive contact point is configured to conduct with the first magnetic member (<NUM>) in a case that the included angle between the first support plate (<NUM>) and the bottom plate is less than the preset angle, to enable magnetism of the first magnetic member (<NUM>) to attract that of the second magnetic member (<NUM>); and
the rotary mechanism (<NUM>) has a second conductive contact point; and
the second conductive contact point is configured to conduct with the first magnetic member (<NUM>) in a case that the included angle between the first support plate (<NUM>) and the bottom plate is the preset angle, to enable magnetism of the first magnetic member (<NUM>) to repel that of the second magnetic member (<NUM>).