Rotating shaft mechanism and foldable electronic device

Abstract

A hinge mechanism and a foldable electronic device. The hinge mechanism is arranged in the foldable electronic device. When one rotating part of the foldable electronic device moves, another rotating part is driven to move through the hinge mechanism. The hinge mechanism includes a fixed support, a transmission assembly, two first transmission shafts, a clamping assembly and a first elastic part. The fixed support is used for fixedly connected with the base of the foldable electronic device, and the fixed support is connected with the first transmission shaft to limit the relative position of the first transmission shaft and the fixed support. The first transmission shaft is connected with the clamping assembly and the first elastic part, and the first elastic part provides an elastic force for the clamping assembly. The friction between the clamping assembly and the transmission assembly forms a damping, so that the foldable electronic device has a damping feeling, and the user's use experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of folding screen, in particular to a hinge mechanism and foldable electronic device. BACKGROUND

[0002] With the increasing maturity of flexible folding screen technology, foldable electronic devices have become a major trend. Foldable electronic devices (such as folding mobile phones, folding tablets, folding computers and other electronic devices) need to meet higher reliability, better operation experience and appearance, so as to be accepted by consumers.

[0003] As a core functional component of the foldable electronic device, the hinge mechanism is used to drive the relative rotation of each part of the foldable electronic device. The stability of the hinge mechanism and the damping formed by the hinge mechanism are closely related to the user experience.

[0004] The portability of the foldable electronic device is increasingly improved, which further compresses the space of the hinge mechanism. When the volume of the hinge mechanism is limited, the stability of the hinge mechanism is often sacrificed, and the damping formed by the hinge mechanism is reduced, resulting in poor user experience. SUMMARY

[0005] The present application provides a hinge mechanism and foldable electronic device, which facilitates to improve the damping force of the hinge mechanism.

[0006] A first aspect of the embodiments of the present application provides a rotating shaft mechanism. The rotating shaft mechanism comprises a fixed support, a transmission assembly, two first transmission shafts, a clamping assembly and a first elastic part. The fixed support has two limiting holes which are spaced apart along a first direction. The transmission assembly comprises two first connecting members which are located on two sides of the fixed support along the first direction and a transmission gear set. Each first connecting member has an end gear. The transmission gear set is located between and engaged with the two end gears. Each end gear is fixed opposite to one first connecting member on the same side. Each first connecting member is used to connect one rotating part on the same side. The first transmission shafts extend along a second direction which is perpendicular to the first direction. The two first connecting members are relatively rotatable with respect to the fixed support through one first transmission shaft. Each first transmission shaft passes through a corresponding end gear and a corresponding limiting hole to limit the movement of the transmission assembly with respect to the fixed support. The clamping assembly is arranged on the first transmission shafts. The clamping assembly is circumferentially limitedly fitted with respect to the fixed support around the first transmission shafts. The clamping assembly comprises a first clamping member and a second clamping member. The first clamping member and the second clamping member are both sleeved on the two first transmission shafts and clamp the fixed support and the transmission assembly along the second direction. The first transmission shafts are limitedly connected with the second clamping member along the second direction, so that the first transmission shafts can drive the second clamping member to relatively approach the fixed support along the second direction. One end of the first elastic part acts on the first clamping member and the other end acts on the first transmission shaft, so that the first clamping member and the second clamping member clamp the fixed support and the transmission assembly along the second direction.

[0007] The rotation shaft mechanism is driven by the transmission gear set and the two end gears, so that the two first connecting members drive the two rotating parts to move synchronously. The fixed support can be directly arranged on the fixed part (base), so that the relative position between the fixed support and the fixed part is fixed. The end gear arranged on the first transmission shaft is limited from translating relative to the fixed support through the cooperation of the limiting hole on the fixed support and the first transmission shaft, so as to reduce the stress on the end gear and the dislocation of the end gear relative to the fixed support. The fixed support is arranged between the clamping assemblies to improve the stability of the rotation shaft mechanism in a limited space. The first elastic part acts on the first clamping member to provide a pressing force of the first clamping member against the fixed support, and since the second clamping member is limitedly connected with the first transmission shaft, the first clamping member and the second clamping member can clamp the fixed support and the transmission assembly under the elastic force. The first elastic part forms at least three contact areas at the contact positions of the first clamping member and the end gear, the contact positions of the end gear and the fixed support, and the contact positions between the second clamping member and the fixed support, so as to fully utilize the space of the rotation shaft mechanism to form the at least three contact areas. When the end gear has a rotating trend, the static friction generated by the three contact areas can form a damping, which can limit the rotation of the end gear, so that the end gear can rotate only when the driving force is greater than the static friction. The at least three contact areas expand the area where the static friction is generated, thereby increasing the value of the static friction, forming greater damping to improve the user experience when the two rotating parts are rotated. When the two rotating parts are at any relative angle and stop, the static friction can limit the relative rotation of the two rotating parts again, so as to facilitate the hovering of the two rotating parts. In this way, a more stable damping module of the rotation shaft mechanism can be realized in a smaller space.

[0008] According to the first aspect, in a possible implementation, the first clamping member is located at one end of the transmission assembly away from the fixed support, and the first clamping member has two first cam surfaces at one end facing the fixed support. Each first connecting member has a second cam surface at one end facing the first clamping member. The first elastic part clamps the fixed support and the transmission assembly in the second direction by the first clamping member and the second clamping member, and the second cam surface abuts against the first cam surface.

[0009] The rotation shaft mechanism can realize self-driving of the end gear at the preset position through abutting of the first cam surface and the second cam surface. For example, if the preset position is the position of the two rotating parts in the folded state, the protruding part of the first cam surface can be completely inserted into the recessed part of the second cam surface when the two rotating parts are located at the position in the folded state. When the two rotating parts approach the position in the folded state, the protruding part of the first cam surface has a tendency to enter the recessed part of the second cam surface due to the elastic force generated by the first elastic part, so that the first connecting piece has a tendency to rotate relative to the first clamping piece, so as to drive the two rotating parts to have a tendency to move towards the folded state through the first connecting piece.

[0010] Based on the first aspect, in a possible implementation, the rotation shaft mechanism further includes two second connecting pieces located on both sides of the fixed support in the first direction, and each second connecting piece is used for connecting one rotating part located on the same side. The second clamping piece is located at one end of the fixed support away from the transmission assembly, and the second clamping piece has two third cam surfaces at the one end of the fixed support. Each second connecting piece is arranged between the second clamping piece and the fixed support. Each second connecting piece has a fourth cam surface at the one end of the second connecting piece toward the second clamping piece. The first clamping piece and the second clamping piece clamp the second connecting piece, the fixed support and the transmission assembly in the second direction, and the third cam surface abuts against the fourth cam surface.

[0011] The rotation shaft mechanism can improve the stability of the connection between the rotating part and the rotation shaft mechanism through the two second connecting members. When the first connecting member and the second connecting member are not directly fixedly connected, the first connecting member and the second connecting member can independently generate a tendency to move in the second direction, when the rotating part drives the first connecting member and the second connecting member to rotate around the axis of the first transmission shaft, a friction area is formed between the second connecting member and the fixed support, and a friction area is also formed between the fixed support and the first connecting member, the two friction areas can form greater damping to increase the stability of the end gear. When the two rotating parts are at any relative angle and stop, the static friction formed by the two friction areas can limit the relative rotation of the two rotating parts again, facilitating the hovering of the two rotating parts. When the first connecting member and the second connecting member are directly fixedly connected, the first connecting member and the second connecting member can be connected with the corresponding rotating part together, facilitating the assembly of the rotating part and the rotation shaft mechanism. Moreover, the self-driving of the second connecting member at the preset position is realized through the third cam surface and the fourth cam surface. For example, if the preset position is the position of the two rotating parts in the folded state, the protruding part of the third cam surface can be completely inserted into the groove part of the fourth cam surface when the two rotating parts are at the position in the folded state, and when the two rotating parts approach the position in the folded state, the protruding part of the third cam surface has a tendency to enter the groove part of the fourth cam surface due to the elastic force generated by the first elastic part, so that the second connecting member has a tendency to rotate relative to the second clamping member, so as to drive the two rotating parts to have a tendency to move towards the folded state through the second connecting member.

[0012] Based on the first aspect, in a possible implementation, the first connecting member and the second connecting member are fixedly connected or designed as one body.

[0013] In the rotation shaft mechanism, the first connecting member and the second connecting member can be connected with the corresponding rotating part together, facilitating the assembly of the rotating part and the rotation shaft mechanism.

[0014] Based on the first aspect, in a possible implementation, the fixed support includes a first part and a second part along the second direction, and the two limiting holes are arranged on the first part. The second part is arranged between the two first transmission shafts and is used for fixedly connecting with the fixed part.

[0015] In the rotation shaft mechanism, the first part has a larger size along the first direction, facilitating the arrangement of the two limiting holes, and has a smaller size along the second direction, so that the limiting hole can limit the position of the first transmission shaft, and reducing the size of the first part along the second direction is conducive to reducing the space occupation of the fixed support. The second part has a smaller size along the first direction, reducing the space occupation of the fixed support.

[0016] In a possible implementation manner of the first aspect, the transmission gear set comprises a middle gear. The rotating shaft mechanism further comprises a second transmission shaft extending in the second direction. The fixing support further comprises a limiting slot, and the second transmission shaft passes through the middle gear and is inserted into the limiting slot to limit movement of the middle gear relative to the fixing support.

[0017] In the rotating shaft mechanism, the second transmission shaft is connected to the middle gear. The fixing support limits the position of the second transmission shaft through the limiting slot, and reduces dislocation of the middle gear relative to the fixing support when the middle gear is subjected to force.

[0018] In a possible implementation manner of the first aspect, the first elastic part comprises a first elastic member and a first positioning member. The first positioning member is arranged on the first transmission shaft and located on a side of the first clamping member away from the second clamping member. The first elastic member is clamped between the first clamping member and the first positioning member.

[0019] In the rotating shaft mechanism, one end of the first elastic member acts on the first clamping member, and the other end indirectly acts on the second clamping member through transmission of the first positioning member and the first transmission shaft, so that the first clamping member and the second clamping member tend to move close to each other, and then the first clamping member and the second clamping member act on the fixing support and the transmission assembly to form a static friction force. The first elastic member is arranged on the side of the first clamping member away from the second clamping member, and does not occupy the space of the fixing support and the transmission assembly.

[0020] In a possible implementation manner of the first aspect, the first transmission shaft is provided with a first stop member and a second stop member. The first stop member acts on the first positioning member to limit the first positioning member from being separated from the first transmission shaft in the second direction. The second stop member acts on the second clamping member to limit the second clamping member from being separated from the first transmission shaft in the second direction.

[0021] In the rotating shaft mechanism, the first stop member limits the position of the first positioning member, and the second stop member limits the position of the second clamping member, so as to facilitate the first elastic member to indirectly act on the second clamping member through transmission of the first positioning member and the first transmission shaft.

[0022] In a possible implementation manner of the first aspect, the rotating shaft mechanism further comprises a second elastic part and a third clamping member. The second elastic part and the third clamping member are arranged on the second transmission shaft. The middle gear is clamped between the fixing support and the third clamping member. The second elastic part acts on the third clamping member to press the third clamping member towards the middle gear in the second direction.

[0023] In the rotation shaft mechanism, the second elastic part acts on the third clamping part to press the third clamping part towards the middle gear. The third clamping part can also press the middle gear towards the fixed support. A friction area is formed between the middle gear and the fixed support, and a friction area is also formed between the third clamping part and the middle gear. The two friction areas can form greater damping. The middle gear and the end gear are in transmission cooperation, and the two friction areas forming greater damping can also increase the stability of the end gear.

[0024] In a possible implementation of the first aspect, the third clamping part is located at one end of the transmission assembly away from the fixed support, and one end of the third clamping part towards the fixed support has two fifth cam surfaces. Each end of the middle gear towards the third clamping part has a sixth cam surface. The second elastic part presses the third clamping part towards the middle gear in the second direction, and the fifth cam surface abuts against the sixth cam surface.

[0025] In the rotation shaft mechanism, the fifth cam surface and the sixth cam surface realize self-driving of the middle gear in the preset position, and indirectly realize self-driving of the end gear in the preset position. For example, if the preset position is the position of the two rotating parts in the folded state, the fifth cam surface can be completely inserted into the groove part of the sixth cam surface when the two rotating parts are in the folded state. When the two rotating parts approach the position of the folded state, the fifth cam surface has a tendency to enter the groove part of the sixth cam surface due to the elastic force generated by the second elastic part, so that the middle gear has a tendency to rotate relative to the third clamping part, so that the two rotating parts have a tendency to move towards the folded state through the middle gear via the end gear.

[0026] In a possible implementation of the first aspect, the third clamping part is fixedly connected with the first clamping part or is designed as one body.

[0027] In the rotation shaft mechanism, the third clamping part and the first clamping part can be pre-assembled and then matched with the first transmission shaft and the second transmission shaft. When the third clamping part and the first clamping part are designed as one body, the manufacturing of the third clamping part and the first clamping part can be facilitated, and the number of parts in the rotation shaft mechanism can be reduced.

[0028] The second elastic part includes a second elastic member and a second positioning member. The second positioning member is arranged on the second transmission shaft and located on the side of the third clamping part away from the middle gear. The second elastic member is clamped between the third clamping part and the second positioning member, and the second elastic member acts on the third clamping part and the second positioning member to press the middle gear towards the fixed support by the third clamping part in the second direction.

[0029] In the rotating shaft mechanism, one end of the second elastic member in the second elastic part acts on the third clamping member, and the other end acts on the second positioning member, so that the third clamping member and the second positioning member have a tendency to move away from each other, and then the third clamping member acts on the middle gear to form a static friction force.

[0030] In a possible implementation of the first aspect, the first positioning member and the second positioning member are fixedly connected or designed as one.

[0031] In the rotating shaft mechanism, the first positioning member has limited the position in the second direction through the first transmission shaft, and the second positioning member is fixedly connected with the first positioning member, so that the position of the second positioning member in the second direction can also be limited. When the first positioning member and the second positioning member are designed as one, the manufacturing of the first positioning member and the second positioning member can be facilitated, and the number of parts in the rotating shaft mechanism can be reduced.

[0032] In a possible implementation of the first aspect, the fixing support has a bolt hole for a bolt to pass through to connect the fixing support and the fixed part.

[0033] In the rotating shaft mechanism, the fixing support is detachably connected with the fixed part through the bolt, so that the assembly of the fixed part and the fixing support is facilitated.

[0034] The second aspect of the present application provides a foldable electronic device. The foldable electronic device includes a first housing and a second housing. The foldable electronic device also includes the rotating shaft mechanism of any one of the implementations of the first aspect. One of the first connecting members in the first housing is connected, and the other of the first connecting members in the second housing is connected. The first housing and the second housing are rotated towards each other or away from each other through the rotating shaft mechanism.

[0035] The foldable electronic device connects the first shell and the second shell through the rotating shaft mechanism, so that the first shell and the second shell can be synchronously rotated towards each other or away from each other, so that the foldable electronic device is in an unfolded state or a folded state. When the first shell and the second shell are rotated towards each other or away from each other, the movement of the end gear provided on the transmission shaft relative to the fixed frame is limited through the cooperation of the limiting hole on the fixed support and the first transmission shaft, and when the end gear is stressed, the end gear is misaligned relative to the fixed part, so that the rotation of the first shell and the second shell is smoother. Moreover, the first elastic part forms two contact areas on both sides of the fixed support and the transmission assembly with the first clamping piece and the second clamping piece, fully utilizing the space of the rotating shaft mechanism to form two contact areas. When the end gear has a rotating trend, the static friction generated by the two contact areas can form damping, which can limit the rotation of the end gear, so that the end gear can only rotate when it is driven by a driving force greater than the static friction. The relative positions of the first shell and the second shell are maintained after the first shell and the second shell stop rotating, and the first shell and the second shell are kept in suspension before being driven to rotate relative to each other by a large enough external force. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 An assembly diagram of a foldable electronic device in an embodiment of the present application is shown.

[0037] Figure 2 A structural diagram of a foldable electronic device in an embodiment of the present application is shown, wherein the foldable electronic device is in an unfolded state.

[0038] Figure 3 A structural diagram of a foldable electronic device in an embodiment of the present application is shown, wherein the foldable electronic device is in a folded state.

[0039] Figure 4 A structural diagram of a rotating shaft mechanism connected with a rotating part in an embodiment of the present application is shown.

[0040] Figure 5 An assembly diagram of a rotating shaft mechanism in an embodiment of the present application is shown.

[0041] Figure 6 A structural diagram of a rotating shaft mechanism in an embodiment of the present application is shown.

[0042] Figure 7 A structural diagram of a rotating shaft mechanism in an embodiment of the present application is shown from another perspective.

[0043] Figure 8 An assembly diagram of a rotating shaft mechanism in an embodiment of the present application is shown.

[0044] Figure 9 A structural schematic diagram of a rotating shaft mechanism in an embodiment of the present application is shown.

[0045] Figure 10 A structural schematic diagram of a rotating shaft mechanism in an embodiment of the present application is shown.

[0046] Main element symbol explanation

[0047] Foldable electronic device 001

[0048] First housing 010

[0049] Second housing 030

[0050] Base 050

[0051] Fixed part 051

[0052] Rotating shaft mechanism 070

[0053] Clamp spring 071

[0054] Four-connection cam 073

[0055] Two-connection gear 075

[0056] Rotating part 077

[0057] Fixed support 100

[0058] Limiting hole 101

[0059] Limiting groove 103

[0060] First part 110

[0061] Second part 130

[0062] Bolt hole 131

[0063] Transmission assembly 200

[0064] Transmission gear set 210

[0065] Middle gear 211

[0066] First transmission shaft 220

[0067] First stopper 221

[0068] Annular groove 223

[0069] Second stopper 225

[0070] First connecting piece 230

[0071] End gear 231

[0072] First mounting hole 233

[0073] Clamping assembly 300

[0074] First clamping piece 310

[0075] Second clamping piece 330

[0076] First elastic part 400

[0077] First elastic piece 410

[0078] First positioning piece 430

[0079] Second cam surface 511

[0080] First cam surface 513

[0081] Fourth cam surface 531

[0082] Third cam surface 533

[0083] Sixth cam surface 551

[0084] Fifth cam surface 553

[0085] Second connecting piece 610

[0086] Second transmission shaft 710

[0087] Third stop piece 711

[0088] Second elastic part 800

[0089] Second elastic piece 810

[0090] Second positioning piece 830

[0091] Third clamping piece 910

[0092] First direction X

[0093] Second direction Y

[0094] The following detailed description will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0095] The specific embodiments of the present application will now be described in detail with specific reference being made to the drawings. The details of the application are intended to be illustrative only and are not intended to limit the scope of the application in any way. It is to be understood that the application is not limited in its application to the details of the construction and the arrangement of the components set forth in the description or illustrated in the drawings. The application is capable of other embodiments and of being practiced or being carried out in various ways. Examples of specific details are described below to provide a thorough understanding of the application. The application can be practiced without these specific details. Moreover, well-known features, such as components, circuits, and steps have not been described in detail so as not to unnecessarily obscure the application. Additionally, well-known structures otherwise enabling this application to be practiced or carried out have not been described in detail so as not to unnecessarily obscure the application. Embodiments of the application can be combined with each other and with embodiments of the application.

[0096] Hereinafter, the terms "first", "second", etc. are used only for the purpose of description and are not to be construed as indicating or implying relative importance or a specific number of the technical features indicated thereby. Thus, the features defined with "first", "second", etc. can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. The orientation terms such as "upper", "lower", "left", "right", etc. are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these orientation terms are relative concepts and are used for relative description and clarification, which can be changed accordingly depending on the orientation of the components shown in the drawings.

[0097] In the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through intermediate medium. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0098] In the following detailed description of the embodiments with reference to the drawings, the drawings show only partial structures of the devices and are partially enlarged without general proportion for the purpose of illustration, and the drawings are only examples and should not limit the scope of protection of the present application.

[0099] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0100] Figure 1 An assembly diagram of a foldable electronic device 001 in an embodiment of the present application is shown. Figure 2 A structural diagram of a foldable electronic device 001 in an embodiment of the present application is shown, wherein the foldable electronic device 001 is in an unfolded state.Figure 3 A structural schematic diagram of a foldable electronic device 001 in an embodiment of the present application is shown, wherein the foldable electronic device 001 is in a folded state.

[0101] As shown in FIG. 1, the foldable electronic device 001 comprises a first housing 010, a second housing 030 and a base 050. The first housing 010 and the second housing 030 are respectively arranged on two sides of the base 050 along a first direction X. Figure 1 Figure 2 As shown in FIG. 1, the first housing 010 and the second housing 030 can rotate towards each other or away from each other. By rotating the first housing 010 and the second housing 030 away from each other, the foldable electronic device 001 can be moved to an unfolded state. By rotating the first housing 010 and the second housing 030 towards each other, the foldable electronic device 001 can be moved to a folded state. Figure 2 Figure 3 A flexible screen can be arranged on the first housing 010, the base 050 and the second housing 030. When the foldable electronic device 001 is moved to the unfolded state, the flexible screen is also unfolded, and the user can observe the entire flexible screen, thereby expanding the visual area of the flexible screen. When the foldable electronic device 001 is moved to the folded state, the flexible screen is also folded, thereby improving the portability of the foldable electronic device 001. If the flexible screen is arranged on the inner side of the foldable electronic device 001, when the foldable electronic device 001 is in the folded state, the flexible screen is shielded and protected by the first housing 010, the second housing 030 and the base 050, thereby reducing the probability of damage to the flexible screen. If the flexible screen is arranged on the outer side of the foldable electronic device 001, when the foldable electronic device 001 is in the folded state, the flexible screen is also divided into a first region located on the first housing 010 and a second region located on the second housing 030, and the first region and the second region can respectively display different contents, thereby expanding the functions of the foldable electronic device 001.

[0102] The foldable electronic device 001 further comprises a hinge mechanism 070. The base 050 forms a fixed part 051 to connect the hinge mechanism 070. The hinge mechanism 070 is arranged on the base 050. The hinge mechanism 070 can further be provided with two rotating parts 077, and the first housing 010 is fixed with one rotating part 077 and the second housing 030 is fixed with the other rotating part 077. When the first housing 010 rotates relative to the base 050, the hinge mechanism 070 can drive the second housing 030 to synchronously rotate relative to the base 050.

[0103] The foldable electronic device 001 further comprises a hinge mechanism 070. The base 050 forms a fixed part 051 to connect the hinge mechanism 070. The hinge mechanism 070 is arranged on the base 050. The hinge mechanism 070 can further be provided with two rotating parts 077, and the first housing 010 is fixed with one rotating part 077 and the second housing 030 is fixed with the other rotating part 077. When the first housing 010 rotates relative to the base 050, the hinge mechanism 070 can drive the second housing 030 to synchronously rotate relative to the base 050.

[0104] ​​It can be understood that if the foldable electronic device 001 does not have the base 050 covering the gap between the first housing 010 and the second housing 030. For example, the foldable electronic device 001 includes a fixed sheet between the first housing 010 and the second housing 030, and the fixed sheet is rotatably connected to the first housing 010 and the second housing 030 on both sides of the fixed sheet, and the fixed sheet is connected to the rotating shaft mechanism 070. The fixed sheet only covers part of the rotating shaft mechanism 070, and a flexible shell is arranged on the side of the fixed sheet away from the rotating shaft mechanism 070 to cover the gap between the first housing 010 and the second housing 030. The flexible shell can be made of leather.

[0105] Figure 4 A structure schematic diagram of the rotating shaft mechanism 070 connected to the rotating part 077 in an embodiment of the present application is shown. Figure 5 An assembly schematic diagram of the rotating shaft mechanism 070 in an embodiment of the present application is shown. Figure 6 A structure schematic diagram of the rotating shaft mechanism 070 in an embodiment of the present application is shown. Figure 7 A structure schematic diagram of the rotating shaft mechanism 070 from another perspective in an embodiment of the present application is shown.

[0106] Please refer to Figure 4 and Figure 5 The rotating shaft mechanism 070 includes a fixed support 100. The fixed support 100 includes a first part 110 and a second part 130. The first part 110 and the second part 130 are designed as a whole, so that the first part 110 and the second part 130 can be integrally formed to keep the relative position of the first part 110 and the second part 130 fixed. The fixed support 100 is provided with a bolt hole 131. By passing the bolt through the bolt hole 131 and screwing it with the base 050, the fixed support 100 is connected with the base 050 to fix the relative position of the base 050 and the fixed support 100. The bolt hole 131 is wholly or partially located in the second part 130. The second part 130 expands the space of the fixed support 100, thereby facilitating the arrangement of the bolt hole 131, enabling the use of a larger size bolt to pass through the bolt hole 131 and be fixed to the base 050, thereby improving the connection strength of the fixed support 100 and the base 050.

[0107] The first part 110 and the second part 130 are arranged along a second direction Y. The second direction Y is perpendicular to the first direction X. Optionally, the size of the second part 130 along the first direction X is smaller than the size of the first part 110 along the first direction X. The two ends of the first part 110 along the first direction X protrude relative to the second part 130. A limiting hole 101 is arranged on each of the two local areas where the first part 110 protrudes from the second part 130. The limiting hole 101 is a through hole penetrating along the second direction Y.

[0108] The rotating shaft mechanism 070 further comprises a transmission assembly 200. The transmission assembly 200 comprises first connecting members 230 located on both sides of the fixed support 100 along the first direction X. The transmission assembly 200 further comprises a transmission gear set 210. Each first connecting member 230 has an end gear 231, and the transmission gear set 210 is located between the two end gears 231. The two end gears 231 are engaged with the transmission gear set 210 on both sides along the first direction X. One first connecting member 230 is connected to the rotating part 077 on the side of the first housing 010, and the other first connecting member 230 is connected to the rotating part 077 on the side of the second housing 030. In a possible embodiment, one first connecting member 230 is slidingly connected to the rotating part 077 on the side of the first housing 010, and the other first connecting member 230 is slidingly connected to the rotating part 077 on the side of the second housing 030. When the first housing 010 or the second housing 030 moves relative to the rotating shaft mechanism 070, the corresponding first connecting member 230 is driven to move, and in turn the corresponding end gear 231 is driven to rotate. The transmission gear set 210 is used to transmit the rotation of one end gear 231 to the other end gear 231. Optionally, the transmission gear set 210 comprises two meshing middle gears 211. When one end gear 231 rotates in a first rotational direction, the other end gear 231 will rotate in a second rotational direction through the transmission of the two middle gears 211. The first rotational direction is opposite to the second rotational direction, so that the first housing 010 and the second housing 030 can rotate synchronously towards each other or away from each other. Optionally, the end gear 231 is an incomplete gear. The end gear 231 drives the first housing and the second housing to move between the unfolded state and the folded state, and correspondingly, the end gear 231 only needs to be provided with teeth in the corresponding rotation range.

[0109] Please refer to Figure 4 、 Figure 5 and Figure 6The rotation shaft mechanism 070 further comprises two first transmission shafts 220. The two first transmission shafts 220 correspond to the two first connecting members 230 one by one. The first transmission shafts 220 extend along the second direction Y. The first transmission shafts 220 pass through the first mounting holes 233 of the corresponding end gears 231 and the limiting holes 101 of the fixed support 100 to connect the first transmission shafts 220, the end gears 231 and the fixed support 100. Each first connecting member 230 is relatively fixed to the fixed support 100 through the corresponding first transmission shaft 220. The fixed support 100 limits the position of the first transmission shaft 220, so that the first transmission shaft 220 is difficult to translate along each direction perpendicular to the second direction Y relative to the fixed support 100. The first transmission shaft 220 in turn limits the position of the end gear 231, so that the end gear 231 is difficult to translate along each direction perpendicular to the second direction Y relative to the first transmission shaft 220. Through the cooperation of the fixed support 100, the first transmission shaft 220 and the end gear 231, the position of the end gear 231 relative to the base 050 is stable. When the first shell 010 and the second shell 030 are driven to rotate relative to each other, the end gear 231 can stably rotate without being easily translated relative to the base 050.

[0110] The rotation shaft mechanism 070 further comprises a clamping assembly 300. The clamping assembly 300 comprises a first clamping member 310 and a second clamping member 330. The first clamping member 310 and the second clamping member 330 are both sleeved on the first transmission shaft 220. Along the second direction Y, the first clamping member 310 is located at one end of the transmission assembly 200 away from the fixed support 100. Along the second direction Y, the second clamping member 330 is located at one end of the fixed support 100 away from the transmission assembly 200. The fixed support 100 and the transmission assembly 200 are clamped between the first clamping member 310 and the second clamping member 330. The first clamping member 310 is circumferentially limited to cooperate with the fixed support 100 around the first transmission shaft 220, and the second clamping member 330 is circumferentially limited to cooperate with the fixed support 100 around the first transmission shaft 220. When the end gear 231 rotates around the axis of the first transmission shaft 220, the first clamping member 310, the second clamping member 330 and the fixed support 100 all do not rotate around the axis of the first transmission shaft 220, so that relative rotation is generated between the end gear 231 and the first clamping member 310, so as to form damping between the end gear 231 and the first clamping member 310. The second clamping member 330 is also limited and connected with the first transmission shaft 220 along the second direction Y. When the first transmission shaft 220 moves along the second direction Y parallel to the second direction Y from the second clamping member 330 to the fixed support 100, the second clamping member 330 can be driven to move relatively close to the fixed support 100.

[0111] Optionally, the first clamping member 310 is sleeved on the two first transmission shafts 220. The second clamping member 330 is sleeved on the two first transmission shafts 220. The two portions of the first clamping member 310 corresponding to the two first transmission shafts 220 can be fixedly connected. For example, the first clamping member 310 is a four-rod cam located at both ends of the first direction X. The relative positions of the two first transmission shafts 220 are fixed by the fixed support 100, so that the four-rod cam cannot rotate around the axis of any first transmission shaft 220. At this time, the first clamping member 310 is circumferentially limited to cooperate with the fixed support 100 around the first transmission shaft 220. When the end gear 231 rotates around the axis of the first transmission shaft 220, the end gear 231 and the first clamping member 310 will produce relative rotation, so that the first clamping member 310 and the end gear 231 form damping. The two portions of the second clamping member 330 corresponding to the two first transmission shafts 220 can also be fixedly connected. The second clamping member 330 is a two-rod cam located at both ends of the first direction X. The relative positions of the two first transmission shafts 220 are fixed by the fixed support 100, so that the two-rod cam cannot rotate around the axis of any first transmission shaft 220. It can be understood that the first clamping member 310 and the second clamping member 330 do not rotate around the first transmission shaft 220 relative to the fixed support 100, so the first clamping member 310 and the second clamping member 330 can also be connected to the first transmission shaft 220 in other forms. For example, each first transmission shaft 220 is circumferentially limited to connect with the fixed support 100. The two portions of the first clamping member 310 located at both ends of the first direction X are designed in two parts, and are circumferentially limited to connect with the corresponding first transmission shaft 220. Each first transmission shaft 220 is circumferentially limited to connect with the fixed support 100, and the two portions of the second clamping member 330 corresponding to the two first transmission shafts 220 are designed in two parts, and are circumferentially limited to connect with the corresponding first transmission shaft 220.

[0112] The rotating shaft mechanism 070 further comprises a first elastic part 400. The first elastic part 400 is arranged on the first transmission shaft 220. The first elastic part 400 is in a force storage state. The first elastic part 400 provides elastic force for the first clamping part 310 and the second clamping part 330, so that the first clamping part 310 and the second clamping part 330 clamp the fixing support 100 and the transmission assembly 200 in the second direction Y. Optionally, the first elastic part 400 comprises a first elastic member 410 and a first positioning member 430. One first elastic member 410 is sleeved on each first transmission shaft 220. The first positioning member 430 is arranged on the first transmission shaft 220 and located on the side of the first clamping part 310 away from the second clamping part 330. The first positioning member 430 is arranged in the second direction Y away from the first clamping part 310, and the first elastic member 410 is clamped between the first positioning member 430 and the first clamping part 310. The first elastic member 410 is in a force storage state, and generates elastic force to make the first positioning member 430 and the first clamping part 310 relatively far away from each other. When the relative movement of the first positioning member 430 and the first transmission shaft 220 in the second direction Y is limited, the relative movement of the second clamping part 330 and the first transmission shaft 220 in the second direction Y is also limited, so that the first positioning member 430 and the second clamping part 330 cannot relatively far away from each other, the elastic force of the first elastic member 410 acts on the second clamping part 330 through the first positioning member 430 and the first transmission shaft 220, so that the first clamping part 310 and the second clamping part 330 have a relatively close trend, and then the first clamping part 310 and the second clamping part 330 clamp the fixing support 100 and the end gear 231 in the second direction Y.

[0113] Optionally, the first elastic member 410 is a compression spring, which can store elastic potential energy and generate elastic force when compressed. As the compression spring is further compressed, it can generate greater elastic force. When the compression spring is stretched, it releases the elastic potential energy and reduces the generated elastic force. Optionally, when the four-connection cam is located at the two ends of the first direction X to form the first clamping part 310, the two first elastic members 410 simultaneously act on the four-connection cam to drive the four-connection cam to be close to the transmission assembly 200.

[0114] Optionally, the first transmission shaft 220 is provided with a first stopper 221. The first stopper 221 is arranged at the end of the first positioning member 430 away from the second clamping member 330. The first positioning member 430 is provided with a first guide hole. The first transmission shaft 220 passes through the first guide hole to limit the relative movement between the first positioning member 430 and the first transmission shaft 220. The projection of the first stopper 221 on the projection plane perpendicular to the second direction Y is at least partially outside the first guide hole. When the first positioning member 430 moves to contact the first stopper 221, the first stopper 221 can limit the first positioning member 430 from passing the first stopper 221 along the second direction Y, and further limit the first positioning member 430 from moving away from the first transmission shaft 220 along the second direction Y.

[0115] Optionally, the first stopper 221 is formed by a circlip 071. The shank of the first transmission shaft 220 is provided with an annular groove 223, and the circlip 071 has a clamping groove. The shape of the clamping groove is similar to that of the annular groove 223, and one side of the clamping groove is provided with an opening. When assembling the circlip 071 and the shank of the first transmission shaft 220, the opening of the clamping groove is first aligned with the annular groove 223, the circlip 071 is moved close to the shank along a direction perpendicular to the second direction Y, and the part of the shank provided with the annular groove 223 is allowed to enter the clamping groove from the opening. The size of the opening is smaller than the diameter of the part of the shank provided with the annular groove 223, but the circlip 071 has a certain elasticity, and the opening can be expanded by the deformation of the circlip 071 to allow the part of the shank provided with the annular groove 223 to pass through the opening and enter the clamping groove. After the part of the shank provided with the annular groove 223 enters the clamping groove, the circlip 071 restores its shape, and the opening becomes smaller to prevent the part of the shank provided with the annular groove 223 from sliding out of the opening again. The end surface of the annular groove 223 limits the movement of the circlip 071 relative to the first transmission shaft 220 along the second direction Y. The circlip 071 acts on the first positioning member 430, and further limits the movement of the first positioning member 430 relative to the first transmission shaft 220 along the second direction Y.

[0116] It can be understood that the first positioning member 430 and the second clamping member can also be fixedly arranged on the first transmission shaft 220. The end gear 231 is rotatably connected to the first transmission shaft 220 about the axis of the first transmission shaft 220. The first positioning member 430 and the second clamping member can move along the second direction Y synchronously with the first transmission shaft 220. The end gear 231 can rotate relative to the fixed support 100 about the axis of the first transmission shaft 220.

[0117] Optionally, referring back to Figure 4 and Figure 5The first transmission shaft 220 is provided with a second stopper 225. The second stopper 225 is arranged at an end of the second clamping member 330 away from the first positioning member 430. The second clamping member 330 is provided with a second guide hole. The first transmission shaft 220 passes through the second guide hole to limit the relative movement of the second clamping member 330 and the first transmission shaft 220. In a projection plane perpendicular to the second direction Y, the projection of the second stopper 225 is at least partially located outside the second guide hole. When the second clamping member 330 moves to contact the second stopper 225, the second stopper 225 can limit the second clamping member 330 from passing the second stopper 225 along the second direction Y, thereby limiting the second clamping member 330 from disengaging from the first transmission shaft 220 along the second direction Y. The second stopper 225 causes the second clamping member 330 to be limitingly connected with the first transmission shaft 220 along the second direction Y. When the first transmission shaft 220 moves along the second direction Y parallel to the second direction Y towards the fixed support 100 along the second clamping member 330, the second clamping member 330 can be driven to relatively approach the fixed support 100.

[0118] When the first connecting member 230 drives the end gear 231 to rotate around the axis of the first transmission shaft 220, the end gear 231 moves relative to the first clamping member 310. The first elastic part 400 causes the first clamping member 310 to press the end gear 231, thereby forming damping between the end gear 231 and the first clamping member 310.

[0119] It can be understood that if the rotating shaft mechanism 070 is not provided with the first positioning member 430, the first elastic part 400 can be fixed to the first transmission shaft 220 at an end away from the fixed support 100. For example, the first elastic part 410 is welded to the first transmission shaft 220 at an end away from the fixed support 100.

[0120] Optionally, the first clamping member 310 has two first cam surfaces 513 at one end thereof facing the fixed support 100. Each first connecting member 230 has a second cam surface 511 at one end thereof facing the first clamping member 310. The second cam surface 511 rotates with the rotation of the end gear 231. Since the first clamping member 310 is circumferentially limitedly fitted relative to the fixed support 100 around the first transmission shaft 220, the first cam surface 513 does not rotate with the rotation of the end gear 231. The second cam surface 511 has a protruding portion and a recessed portion circumferentially arranged around the first transmission shaft 220, and the first cam surface 513 also has a protruding portion and a recessed portion circumferentially arranged around the first transmission shaft 220. When the protruding portion of the second cam surface 511 is inserted into the recessed portion of the first cam surface 513, the protruding portion of the first cam surface 513 is also inserted into the recessed portion of the second cam surface 511. The first elastic part 400 acts on the first clamping member 310, so that the first clamping member 310 has a tendency to move towards the end gear 231, and in turn the first cam surface 513 presses the second cam surface 511. When the protruding portion of the first cam surface 513 is not completely inserted into the recessed portion of the second cam surface 511, the elastic force provided by the first elastic part 400 makes the protruding portion of the first cam surface 513 have a tendency to be further inserted into the recessed portion of the second cam surface 511. At the same time, the contact between the second cam surface 511 and the first cam surface 513 also generates a friction force, which can limit the further insertion of the protruding portion of the first cam surface 513 into the recessed portion of the second cam surface 511. Corresponding to Figure 2 As shown in the foldable electronic device 001, when the first housing 010 and the second housing 030 are in an intermediate state between the unfolded state and the folded state during the movement of the foldable electronic device 001 from the unfolded state to the folded state, the friction force between the second cam surface 511 and the first cam surface 513 can help the first housing 010 and the second housing 030 to maintain in the intermediate state, assisting in achieving the hovering of the first housing 010 and the second housing 030.

[0121] When the foldable electronic device 001 is in the unfolded state, the protruding portion of the second cam surface 511 is completely inserted into the recessed portion of the first cam surface 513. At this time, if the second cam surface 511 and the first cam surface 513 want to rotate relative to each other, not only the static friction force between the second cam surface 511 and the first cam surface 513 needs to be overcome, but also the elastic force of the first elastic part 400 resisting the relative moving away of the second cam surface 511 and the first cam surface 513 along the second direction Y needs to be overcome. The cooperation of the second cam surface 511 and the first cam surface 513 can limit the foldable electronic device 001 to be more stably in the unfolded state.

[0122] When the foldable electronic device 001 is in the folded state, the protruding portion of the second cam surface 511 is completely inserted into the recessed portion of the first cam surface 513. At this time, if the second cam surface 511 and the first cam surface 513 are to be relatively rotated, not only the static friction force between the second cam surface 511 and the first cam surface 513 has to be overcome, but also the elastic force of the first elastic portion 400 that prevents the second cam surface 511 and the first cam surface 513 from relatively moving away in the second direction Y has to be overcome. The cooperation of the second cam surface 511 and the first cam surface 513 can limit the foldable electronic device 001 to be in the folded state more stably. It can be understood that the complete insertion of the protruding portion of the second cam surface 511 into the recessed portion of the first cam surface 513 means that the relative rotation of the second cam surface 511 around any one of the rotation directions with respect to the first cam surface 513 will make the protruding portion of the second cam surface 511 slide along the recessed portion of the first cam surface 513, so that the second cam surface 511 and the first cam surface 513 relatively move away. Therefore, when the size of the protruding portion of the second cam surface 511 is greater than the size of the recessed portion of the first cam surface 513 in the second direction Y, the protruding portion of the second cam surface 511 cannot be completely accommodated in the recessed portion of the first cam surface 513, but when the end of the protruding portion of the second cam surface 511 contacts the bottom wall of the recessed portion of the first cam surface 513, it can also be understood that the protruding portion of the second cam surface 511 is completely inserted into the recessed portion of the first cam surface 513.

[0123] Alternatively, the end gear 231 is slidably connected with the first transmission shaft 220 in the second direction Y. The fixed support 100 is located at the end of the end gear 231 away from the first clamping member 310. The pressure of the first clamping member 310 pressing the end gear 231 is further transmitted to the end gear 231 and the fixed support 100. When the rotating part 077 connected with the first connecting member 230 moves, the end gear 231 rotates relative to the fixed support 100 around the first transmission shaft 220. The end gear 231 presses the fixed support 100 in the second direction Y, so that the end gear 231 and the fixed support 100 rub against each other. When the end gear 231 has a tendency to rotate relative to the fixed support 100 around the first transmission shaft 220, a static friction force is formed between the end gear 231 and the fixed support 100 to reduce the rotation of the end gear 231 relative to the fixed support 100, so that the rotating part 077 connected with the first connecting member 230 can be in a stable positional relationship with the base 050 connected with the fixed support 100. Corresponding to Figure 2In the folding electronic device 001 shown, when the first housing 010 and the second housing 030 are in an intermediate state between the unfolded state and the folded state during the movement of the folding electronic device 001 from the unfolded state to the folded state, the static friction between the end gear 231 and the fixed support 100 can help the first housing 010 and the second housing 030 to maintain the intermediate state, thereby assisting the hovering of the first housing 010 and the second housing 030.

[0124] Alternatively, please refer to Figure 5 , Figure 6 and Figure 7 , the pivot mechanism 070 further comprises a second connecting member 610. The second connecting member 610 is partially arranged between the second clamping member 330 and the fixed support 100. One second connecting member 610 is arranged on each first transmission shaft 220. The second connecting member 610 is sleeved on the first transmission shaft 220, so that the second connecting member 610 can rotate relative to the fixed support 100 around the axis of the first transmission shaft 220. The second connecting member 610 is used to connect the rotating part 077 on the side of the first housing 010 or the second housing 030. The first connecting member 230 and the second connecting member 610 on the same first transmission shaft 220 connect the same rotating part 077.

[0125] Alternatively, the second connecting member 610 and the first connecting member 230 can be designed in a split type, so that the second connecting member 610 and the first connecting member 230 can be independently connected to the same rotating part 077. Further, the second connecting member 610 and the first connecting member 230 located on the same first transmission shaft 220 can also have a relative displacement in the second direction Y. When the first elastic part 400 acts on the second clamping part 330 through the first transmission shaft 220, the second clamping part 330 can be pressed towards the second connecting member 610, and the second connecting member 610 can be pressed towards the first part 110 of the fixed support 100. Further, a contact area is formed between the second clamping part 330 and the second connecting member 610, and a contact area is also formed between the second connecting member 610 and the fixed support 100. When the second connecting member 610 rotates relative to the fixed support 100 around the first transmission shaft 220, friction can be generated in the two contact areas. When the rotating part 077 connected by the second connecting member 610 moves, it drives the second connecting member 610 to rotate relative to the fixed support 100 around the first transmission shaft 220. The second connecting member 610 also rotates relative to the second clamping part 330 around the first transmission shaft 220. The second clamping part 330 presses the second connecting member 610 in the second direction Y, so that the second clamping part 330 and the second connecting member 610 rub against each other. When the second connecting member 610 has a tendency to rotate relative to the second clamping part 330 around the first transmission shaft 220, static friction is formed between the second clamping part 330 and the second connecting member 610 to reduce the tendency of the second connecting member 610 to rotate relative to the second clamping part 330. At this time, the rotating part 077 connected by the second connecting member 610 can be kept in a relatively stable position relative to the base 050 connected by the fixed support 100. Corresponding to Figure 2 As shown in the foldable electronic device 001, when the first housing 010 and the second housing 030 are in an intermediate state between the unfolded state and the folded state during the movement of the foldable electronic device 001 from the unfolded state to the folded state, the static friction between the second clamping part 330 and the second connecting member 610 can help the first housing 010 and the second housing 030 to maintain the intermediate state.

[0126] Optionally, the second clamping member 330 has two third cam surfaces 533 on the end facing the fixed bracket 100. Each second connecting member 610 has a fourth cam surface 531 on the end facing the second clamping member 330. The third cam surfaces 533 rotate with the rotation of the second connecting member 610. The fourth cam surfaces 531 rotate with the rotation of the second connecting member 610. Because the second clamping member 330 is circumferentially limited relative to the fixed bracket 100 around the first transmission shaft 220, the third cam surfaces 533 do not rotate with the rotation of the end gear 231. The fourth cam surfaces 531 have a raised portion and a recessed portion arranged circumferentially around the first transmission shaft 220. The third cam surfaces 533 also have a raised portion and a recessed portion arranged circumferentially around the first transmission shaft 220. When the raised portion of the fourth cam surface 531 is inserted into the recessed portion of the third cam surface 533, the raised portion of the third cam surface 533 is also inserted into the recessed portion of the fourth cam surface 531. The first elastic part 400 acts on the second clamping member 330, causing the second clamping member 330 to tend to move toward the second connecting member 610, thereby causing the third cam surface 533 to press against the fourth cam surface 531. When the raised portion of the third cam surface 533 is not fully inserted into the groove portion of the fourth cam surface 531, the elastic force provided by the first elastic part 400 causes the raised portion of the third cam surface 533 to tend to further insert into the groove portion of the fourth cam surface 531. At the same time, the contact between the fourth cam surface 531 and the third cam surface 533 also generates friction, which can limit the raised portion of the third cam surface 533 from further inserting into the groove portion of the fourth cam surface 531. Figure 2 The foldable electronic device 001 shown in the figure, when the foldable electronic device 001 moves from the unfolded state to the folded state, when the first shell 010 and the second shell 030 are in the intermediate state between the unfolded state and the folded state, the friction between the fourth cam surface 531 and the third cam surface 533 can help the first shell 010 and the second shell 030 to maintain in the intermediate state, and assist in achieving the hovering of the first shell 010 and the second shell 030.

[0127] When the foldable electronic device 001 is in the unfolded state, the raised portion of the fourth cam surface 531 is fully inserted into the recessed portion of the third cam surface 533. At this point, relative rotation between the fourth cam surface 531 and the third cam surface 533 must overcome not only the static friction between them but also the elastic force of the first elastic portion 400 that prevents the fourth cam surface 531 and the third cam surface 533 from moving apart in the second direction Y. The cooperation between the fourth cam surface 531 and the third cam surface 533 ensures that the foldable electronic device 001 remains more stable in the unfolded state.

[0128] When the foldable electronic device 001 is in the folded state, the protruding portion of the fourth cam surface 531 is fully inserted into the recessed portion of the third cam surface 533. At this time, if the fourth cam surface 531 and the third cam surface 533 are to be rotated relative to each other, not only the static friction force between the fourth cam surface 531 and the third cam surface 533 has to be overcome, but also the elastic force of the first elastic part 400 that prevents the fourth cam surface 531 and the third cam surface 533 from moving away from each other in the second direction Y has to be overcome. The cooperation of the fourth cam surface 531 and the third cam surface 533 can limit the foldable electronic device 001 to be in the folded state more stably.

[0129] Alternatively, the second connecting member 610 is slidably connected to the first transmission shaft 220 in the second direction Y. The fixed support 100 is located at the end of the second connecting member 610 away from the second clamping member 330. The pressure with which the second clamping member 330 presses the second connecting member 610 is also further transmitted between the second connecting member 610 and the fixed support 100. The second connecting member 610 presses the fixed support 100 in the second direction Y, so that the second connecting member 610 and the fixed support 100 rub against each other. When the second connecting member 610 has a tendency to rotate relative to the fixed support 100 about the first transmission shaft 220, a static friction force is formed between the second connecting member 610 and the fixed support 100 to reduce the rotation of the end gear 231 relative to the fixed support 100, so that the rotating part 077 connected by the second connecting member 610 can be in a stable positional relationship with the base 050 connected by the fixed support 100. Correspondingly Figure 2 In the foldable electronic device 001 shown, when the first housing 010 and the second housing 030 are in an intermediate state between the unfolded state and the folded state during the movement of the foldable electronic device 001 from the unfolded state to the folded state, the static friction force between the second connecting member 610 and the fixed support 100 can help the first housing 010 and the second housing 030 to maintain the intermediate state.

[0130] The steps of assembling the rotation shaft mechanism 070 include: sequentially passing the first transmission shaft 220 through the second clamping member 330, the second connecting member 610, the fixed support 100, the end gear 231 of the first connecting member 230, the first clamping member 310, the first elastic part 410, and the first positioning member 430, and arranging the first stop member 221 on the rod body of the first transmission shaft 220.

[0131] Figure 8 A schematic assembly view of the rotation shaft mechanism 070 in an embodiment of the present application is shown. Figure 9 A schematic structural view of the rotation shaft mechanism 070 in an embodiment of the present application is shown. Figure 10 A schematic structural view of the rotation shaft mechanism 070 in an embodiment of the present application is shown.

[0132] Please refer toFigure 8 、 Figure 9 and Figure 10 The first connecting member 230 and the second connecting member 610 of the rotating shaft mechanism 070 can also be fixedly connected. When the first connecting member 230 and the second connecting member 610 are fixedly connected, the first connecting member 230 and the second connecting member 610 move synchronously in the second direction Y. The first connecting member 230 and the second connecting member 610 rotate synchronously relative to the first transmission shaft 220, which facilitates the connection of the first connecting member 230 and the second connecting member 610 with the rotating part 077 at the same time.

[0133] Alternatively, the first connecting member 230 and the second connecting member 610 are designed integrally, which facilitates the manufacture of the first connecting member 230 and the second connecting member 610.

[0134] When assembling the rotating shaft mechanism 070, the first part 110 of the fixed support 100 can be first inserted between the second connecting member 610 and the end gear 231. Then the first transmission shaft 220 is sequentially inserted through the second clamping member 330, the second connecting member 610, the fixed support 100, the end gear 231 of the first connecting member 230, the first clamping member 310, the first elastic member 410, and the first positioning member 430.

[0135] Please refer back to Figure 5 、 Figure 6 and Figure 7 The rotating shaft mechanism 070 further comprises a second transmission shaft 710. The second transmission shaft 710 extends along the second direction Y. The second transmission shaft 710 corresponds to the middle gear 211 one by one. The fixed support 100 has a limiting slot 103 corresponding to the middle gear 211 one by one. Alternatively, the number of middle gears 211 is two, the number of limiting slots 103 is two, and the number of second transmission shafts 710 is also two. The second transmission shaft 710 is inserted into the limiting slot 103, and the relative position of the second transmission shaft 710 and the base 050 can be limited through the limiting slot 103. The second transmission shaft 710 passes through the second mounting hole of the middle gear 211 and is inserted into the limiting slot 103 of the fixed support 100, so as to connect the second transmission shaft 710, the fixed support 100, and the middle gear 211. The end of the second transmission shaft 710 is accommodated in the limiting slot 103, so as to reduce the space occupation of the second transmission shaft 710 in the rotating shaft mechanism 070, facilitate the placement of the second part 130 of the fixed support 100. A accommodation space is formed between the second clamping member 330, the two second connecting members 610, and the first part 110 of the fixed support 100. The second part 130 of the fixed support 100 is accommodated in the accommodation space, so that the second part 130 of the fixed support 100 can be closely arranged on the base 050, and the base 050 and the second part 130 of the fixed support 100 can be connected.

[0136] The rotating shaft mechanism 070 also includes a second elastic portion 800 and a third clamping member 910. The third clamping member 910 is mounted on the two second transmission shafts 710 and is located on the end of the middle gear 211 facing away from the fixed bracket 100. The second elastic portion 800 is disposed on the second transmission shaft 710. When in a charged state, the second elastic portion 800 provides elastic force to the third clamping member 910, causing the third clamping member 910 to press the middle gear 211 toward the fixed bracket 100 in the second direction Y. Optionally, the second elastic portion 800 includes a second elastic member 810 and a second positioning member 830. A second elastic member 810 is mounted on each second transmission shaft 710. The second positioning member 830 is located on the side of the third clamping member 910 facing away from the middle gear 211. The second positioning member 830 and the third clamping member 910 are spaced apart in the second direction Y, with the second elastic member 810 sandwiched between the third clamping member 910 and the second positioning member 830. The second elastic member 810 generates an elastic force that causes the third clamping member 910 and the second positioning member 830 to move relatively apart. When the relative movement of the second positioning member 830 and the second transmission shaft 710 along the second direction Y is restricted, the elastic force of the second elastic member 810 acts on the third clamping member 910, causing the third clamping member 910 to press toward the middle gear 211. Optionally, the second elastic member 810 is a compression spring that can store elastic potential energy and generate elastic force when compressed. As the compression spring is further compressed, the compression spring can generate greater elastic force. When the compression spring stretches, the elastic potential energy is released and the generated elastic force is reduced.

[0137] Optionally, the second transmission shaft 710 is provided with a third stopper 711. The third stopper 711 is provided at the end of the second positioning member 830 facing away from the third clamping member 910. The second positioning member 830 is provided with a second guide hole. The second transmission shaft 710 passes through the second guide hole to limit the relative movement of the second positioning member 830 and the second transmission shaft 710. Along the projection plane perpendicular to the second direction Y, the projection of the third stopper 711 is at least partially located outside the second guide hole. When the second positioning member 830 moves to contact the third stopper 711, the third stopper 711 can limit the second positioning member 830 from passing through the third stopper 711 along the second direction Y, thereby limiting the second positioning member 830 from separating from the second transmission shaft 710 along the second direction Y.

[0138] Optionally, the second positioning member 830 is fixedly connected with the first positioning member 430. The first positioning member 430 and the second positioning member 830 can be integrally designed, so that the first positioning member 430 and the second positioning member 830 are integrally formed to keep the relative position of the first positioning member 430 and the second positioning member 830 fixed. The first positioning member 430 and the second positioning member 830 are formed by one clamping plate. Four through holes are arranged at intervals along the first direction X on the clamping plate. Among the four through holes, two through holes at both ends of the first direction X are used for the first transmission shaft 220 to pass through, so that the part of the clamping plate at both ends of the first direction X forms the first positioning member 430. Among the four through holes, the two through holes in the middle are used for the second transmission shaft 710 to pass through, so that the part of the clamping plate in the middle forms the second positioning member 830.

[0139] Optionally, the third stop member 711 is fixedly connected with the first stop member 221. The relative position of the first stop member 221 along the second direction Y relative to the first transmission shaft 220 is limited, so that the relative position of the third stop member 711 along the second direction Y relative to the first transmission shaft 220 is limited. The first stop member 221 and the third stop member 711 can be integrally designed, and the first stop member 221 and the third stop member 711 are formed by the clasp spring 071. The clasp spring 071 forms one first stop member 221 at each end along the first direction X. Each first stop member 221 has a clamping groove. Each clamping groove corresponds to fit one first transmission shaft 220, thereby limiting the relative movement of the clasp spring 071 and the first transmission shaft 220 along the second direction Y. The middle part of the clasp spring 071 forms two third stop members 711. When the relative movement of the first stop member 221 and the first transmission shaft 220 is limited, the relative movement of the third stop member 711 and the first transmission shaft 220 is also limited. Thus, the third stop member 711 can apply pressure to the second elastic member 810.

[0140] It can be understood that when the second transmission shaft 710 is fixedly connected with the fixed support 100 along the second direction Y, the second positioning member 830 can also be fixed on the second transmission shaft 710. The third clamping member 910 is slidably fitted with the second transmission shaft 710 along the second direction Y, so that when the second elastic member 810 is pressed by the third clamping member 910 and the second positioning member 830, the second elastic member 810 acts on the third clamping member 910 to make the third clamping member 910 press the middle gear 211. If the rotating shaft mechanism 070 does not provide the second positioning member 830. The end of the second elastic member 810 away from the fixed support 100 can also be fixed on the second transmission shaft 710. For example, the end of the second elastic member 810 away from the fixed support 100 is welded on the second transmission shaft 710.

[0141] The second elastic member 810 causes the third clamping member 910 to press against the middle gear 211, and the middle gear 211 also presses against the fixed support 100. When the end gear 231 causes the middle gear 211 to have a tendency to rotate, the middle gear 211 has a tendency to rotate relative to the third clamping member 910, and a frictional force is generated between the third clamping member 910 and the middle gear 211 to reduce the tendency. When the end gear 231 causes the middle gear 211 to have a tendency to rotate, the middle gear 211 has a tendency to rotate relative to the fixed support 100, and a frictional force is generated between the fixed support 100 and the middle gear 211 to reduce the tendency. Correspondingly Figure 2 As shown in the foldable electronic device 001, when the first housing 010 and the second housing 030 are in an intermediate state between the unfolded state and the folded state during the movement of the foldable electronic device 001 from the unfolded state to the folded state. The frictional force between the middle gear 211 and the fixed support 100 and the frictional force between the middle gear 211 and the third clamping member 910 can help the first housing 010 and the second housing 030 to maintain in the intermediate state.

[0142] Alternatively, one end of the third clamping member 910 towards the fixed support 100 has two fifth cam surfaces 553. Each end of the middle gear 211 towards the third clamping member 910 has a sixth cam surface 551. The sixth cam surface 551 rotates with the rotation of the middle gear 211. Since the third clamping member 910 is circumferentially limitedly fitted relative to the fixed support 100 around the second transmission shaft 710, the fifth cam surface 553 does not rotate with the rotation of the middle gear 211. The sixth cam surface 551 has a protruding portion and a recessed portion circumferentially arranged around the second transmission shaft 710, and the fifth cam surface 553 also has a protruding portion and a recessed portion circumferentially arranged around the second transmission shaft 710. When the protruding portion of the sixth cam surface 551 is inserted into the recessed portion of the fifth cam surface 553, the protruding portion of the fifth cam surface 553 is also inserted into the recessed portion of the sixth cam surface 551. The second elastic member 800 acts on the third clamping member 910, causing the third clamping member 910 to have a tendency to move towards the middle gear 211, and further causing the fifth cam surface 553 to press against the sixth cam surface 551. When the protruding portion of the fifth cam surface 553 is not completely inserted into the recessed portion of the sixth cam surface 551, the elastic force provided by the second elastic member 800 causes the protruding portion of the fifth cam surface 553 to have a tendency to further insert into the recessed portion of the sixth cam surface 551. At the same time, the contact between the sixth cam surface 551 and the fifth cam surface 553 also generates a frictional force, which can limit the further insertion of the protruding portion of the fifth cam surface 553 into the recessed portion of the sixth cam surface 551. Correspondingly Figure 2As shown in the foldable electronic device 001, when the first housing 010 and the second housing 030 are in the intermediate state between the unfolded state and the folded state during the movement of the foldable electronic device 001 from the unfolded state to the folded state, the friction between the sixth cam surface 551 and the fifth cam surface 553 can help the first housing 010 and the second housing 030 to maintain the intermediate state.

[0143] When the foldable electronic device 001 is in the unfolded state, the protruding part of the sixth cam surface 551 is fully inserted into the groove part of the fifth cam surface 553. At this time, if the sixth cam surface 551 and the fifth cam surface 553 are to be relatively rotated, not only the static friction between the sixth cam surface 551 and the fifth cam surface 553 has to be overcome, but also the elastic force of the second elastic part 800 resisting the relative moving apart of the sixth cam surface 551 and the fifth cam surface 553 along the second direction Y has to be overcome. The cooperation of the sixth cam surface 551 and the fifth cam surface 553 can limit the foldable electronic device 001 to be in the unfolded state more stably.

[0144] When the foldable electronic device 001 is in the folded state, the protruding part of the sixth cam surface 551 is fully inserted into the groove part of the fifth cam surface 553. At this time, if the sixth cam surface 551 and the fifth cam surface 553 are to be relatively rotated, not only the static friction between the sixth cam surface 551 and the fifth cam surface 553 has to be overcome, but also the elastic force of the second elastic part 800 resisting the relative moving apart of the sixth cam surface 551 and the fifth cam surface 553 along the second direction Y has to be overcome. The cooperation of the sixth cam surface 551 and the fifth cam surface 553 can limit the foldable electronic device 001 to be in the folded state more stably.

[0145] Optionally, the third clamping part 910 and the first clamping part 310 are fixedly connected. The third clamping part 910 and the first clamping part 310 can be designed as one body, so that the third clamping part 910 and the first clamping part 310 can be integrally formed to keep the relative position of the third clamping part 910 and the first clamping part 310 fixed. For example, the first clamping part 310 is a part of a four-body cam located at the two ends of the first direction X. The third clamping part 910 is a part of the four-body cam located in the middle. The four-body cam is connected with two first transmission shafts 220 and two second transmission shafts 710 at the same time, so as to limit the rotation of the four-body cam relative to the fixed support 100 around any one of the first transmission shaft 220 or the second transmission shaft 710. When the end gear 231 and the middle gear 211 rotate, the end gear 231 can rotate relative to the first clamping part 310, and the middle gear 211 can rotate relative to the third clamping part 910. The first cam surface and the fifth cam surface are also formed on the four-body cam.

[0146] The foldable electronic device 001 can be in a folded state by rotating the first housing 010 and the second housing 030 towards each other, or in an unfolded state by rotating the first housing 010 and the second housing 030 away from each other. When the first housing 010 rotates relative to the base 050, the first housing 010 moves relative to the base 050 to drive the corresponding end gear 231 of the first housing 010 to rotate, and through the transmission of the transmission gear set 210, the corresponding end gear 231 of the second housing 030 is driven to rotate, thereby driving the second housing 030 to rotate relative to the base 050. The fixed support 100 is fixedly connected with the base 050, the first transmission shaft 220 passes through the limiting hole 101 of the fixed support 100, and the second transmission shaft 710 extends into the limiting groove 103 of the fixed support 100. The relative positions of the first transmission shaft 220, the second transmission shaft 710 and the base 050 can be limited by the fixed support 100. When the first housing 010 rotates relative to the base 050, the offset of the first transmission shaft 220 and the second transmission shaft 710 relative to the base 050 can be reduced, and the stability of the relative rotation of the first housing 010 and the second housing 030 can be improved. The fixed support 100 is arranged between the first clamping piece 310 and the second clamping piece 330, and the space in the foldable electronic device 001 is fully utilized. The space occupation of the rotating shaft mechanism 070 in the foldable electronic device 001 is reduced. By clamping the second connecting piece 610, the fixed support 100 and the end gear 231 through the first clamping piece 310 and the second clamping piece 330, damping is formed between the first clamping piece 310 and the end gear 231, and damping is also formed between the second clamping piece 330 and the second connecting piece 610. Thus, when the foldable electronic device 001 is in an intermediate state between the unfolded state and the folded state, the stability of the foldable electronic device 001 in the intermediate state is improved. The second transmission shaft 710 can guide the force storage of the second elastic part 800, and by arranging the second transmission shaft 710, the second elastic part 800 can be installed to provide greater damping, improve the stability of the foldable electronic device 001 in the intermediate state, and assist in achieving the hovering of the first housing 010 and the second housing 030. The second transmission shaft 710 is limited in the limiting groove 103 of the fixed support 100, so that the second transmission shaft 710 does not protrude from the first part 110 of the fixed support 100, and a containing space is formed between the second clamping piece 330, the two second connecting pieces 610 and the first part 110 of the fixed support 100. The second part 130 of the fixed support 100 is accommodated in the containing space, so that the second part 130 of the fixed support 100 can be closely arranged with the base 050, and the second part 130 of the fixed support 100 and the base 050 can be conveniently connected.

[0147] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this, any change or replacement within the technical range disclosed by the present application should be covered in the disclosure range of the present application.

Claims

1. A rotating shaft mechanism, characterized in that: include: A fixing bracket, wherein the fixing bracket has two limiting holes spaced apart along a first direction; a transmission assembly comprising two first connecting members located on both sides of the fixed bracket along the first direction and a transmission gear set, each of the first connecting members having an end gear, the transmission gear set being located between the two end gears and meshing with the two end gears, each of the end gears being fixed relative to a first connecting member located on the same side, and each of the first connecting members being used to connect to a rotating portion located on the same side; Two first transmission shafts, each of the first transmission shafts extending in a second direction perpendicular to the first direction, the two first connecting members respectively rotating relative to the fixed bracket via one of the first transmission shafts; each of the first transmission shafts passes through the corresponding end gear and the corresponding limiting hole; a clamping assembly, the clamping assembly being circumferentially limitedly engaged with the fixed bracket around the first transmission shaft, the clamping assembly comprising a first clamping member and a second clamping member, the first clamping member and the second clamping member both being sleeved on the two first transmission shafts and clamping the fixed bracket and the transmission assembly along the second direction, the first transmission shaft being positionally connected to the second clamping member along the second direction so that the first transmission shaft can drive the second clamping member to be relatively close to the fixed bracket along the second direction; A first elastic part, one end of the first elastic part acts on the first clamping member, and the other end acts on the first transmission shaft, so that the first clamping member and the second clamping member clamp the fixing bracket and the transmission assembly along the second direction.

2. The rotating shaft mechanism according to claim 1, wherein: The first clamping member is located at an end of the transmission assembly away from the fixed bracket, and the first clamping member has two first cam surfaces at an end facing the fixed bracket; Each of the first connecting members has a second cam surface at one end facing the first clamping member; The first elastic portion enables the first clamping member and the second clamping member to clamp the fixing bracket and the transmission assembly along the second direction, and the second cam surface abuts against the first cam surface.

3. The rotating shaft mechanism according to claim 1, wherein: The rotating shaft mechanism further includes two second connecting members located on both sides of the fixed bracket along the first direction, each second connecting member being used to connect to one of the rotating parts located on the same side; The second clamping member is located at an end of the fixing bracket away from the transmission assembly, and the second clamping member has a third cam surface at an end facing the fixing bracket; Each of the second connecting members is disposed between the second clamping member and the fixing bracket; Each of the second connecting members has a fourth cam surface at one end facing the second clamping member; The first clamping member and the second clamping member clamp the second connecting member, the fixing bracket and the transmission assembly along the second direction, and the third cam surface abuts against the fourth cam surface.

4. The rotating shaft mechanism according to claim 3, wherein: The first connecting member and the second connecting member are fixedly connected or designed as one body.

5. The rotating shaft mechanism according to claim 1, wherein: The fixing bracket includes a first part and a second part along the second direction, and the two limiting holes are provided in the first part; The second portion is disposed between the two first transmission shafts and is configured to be fixedly connected to the fixing portion.

6. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that: The transmission gear set includes a middle gear; The rotating shaft mechanism further includes a second transmission shaft, and the second transmission shaft extends along the second direction; The fixing bracket further has a limiting groove, and the second transmission shaft passes through the middle gear and is inserted into the limiting groove to limit the movement of the middle gear relative to the fixing bracket.

7. The rotating shaft mechanism according to claim 6, wherein: The first elastic portion includes a first elastic member and a first positioning member; The first positioning member is provided on the first transmission shaft and is located on a side of the first clamping member facing away from the second clamping member; The first elastic member is clamped between the first clamping member and the first positioning member.

8. The rotating shaft mechanism according to claim 7, wherein: The first transmission shaft is provided with a first stop member and a second stop member; The first stop member acts on the first positioning member to limit the first positioning member from being separated from the first transmission shaft along the second direction; The second stopping member acts on the second clamping member to limit the second clamping member from separating from the first transmission shaft along the second direction.

9. The rotating shaft mechanism according to claim 7, wherein: The rotating shaft mechanism further includes a second elastic portion and a third clamping member; The second elastic portion and the third clamping member are both provided on the second transmission shaft; The middle gear is clamped between the fixing bracket and the third clamping member; The second elastic portion acts on the third clamping member, causing the third clamping member to press toward the middle gear along the second direction.

10. The rotating shaft mechanism according to claim 9, wherein: The third clamping member is located at an end of the transmission assembly away from the fixed bracket, and the end of the third clamping member facing the fixed bracket has two fifth cam surfaces; Each of the middle gears has a sixth cam surface at one end facing the third clamping member; The second elastic portion causes the third clamping member to press toward the middle gear along the second direction, and the fifth cam surface abuts against the sixth cam surface.

11. The rotating shaft mechanism according to claim 9, wherein: The third clamping member is fixedly connected to the first clamping member or is designed as an integral whole.

12. The rotating shaft mechanism according to claim 9, wherein: The second elastic portion includes a second elastic member and a second positioning member; The second positioning member is provided on the second transmission shaft and is located on a side of the third clamping member away from the middle gear; The second positioning member is fixedly connected to the first positioning member; The second elastic member is clamped between the third clamping member and the second positioning member. The second elastic member acts on the third clamping member and the second positioning member, so that the third clamping member presses the middle gear toward the fixing bracket along the second direction.

13. The rotating shaft mechanism according to claim 12, wherein: The first positioning member and the second positioning member are fixedly connected or designed as one body.

14. A foldable electronic device comprising a first housing and a second housing, characterized in that: The foldable electronic device further comprises a hinge mechanism according to any one of claims 1 to 13; The first shell is connected to one of the first connecting members, and the second shell is connected to another one of the first connecting members; The first shell and the second shell are rotated toward or away from each other through the rotating shaft mechanism to achieve relative folding or unfolding.

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