CN210297784U

CN210297784U - Folding device and electronic equipment

Info

Publication number: CN210297784U
Application number: CN201921842807.4U
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-04-10
Anticipated expiration: 2029-10-29

Abstract

The application discloses a folding device and electronic equipment, wherein the folding device comprises a rotating shaft base and two main bodies arranged on two opposite sides of the rotating shaft base; each main body is provided with a rotating part which is rotatably connected with the rotating shaft base and a shell which is fixedly connected with the rotating part, and the two rotating parts respectively drive the two shells to be mutually unfolded or closed; the end part of at least one rotating piece which is rotatably connected with the rotating shaft base is provided with a positioning groove; the rotating shaft base comprises a base, an elastic piece and a sliding buckle, the base is connected with the rotating piece in a rotating mode, the sliding buckle is connected with the base in an equal sliding mode, the elastic piece is connected with the base in an elastic mode, the sliding buckle is used for limiting the rotating piece to rotate relatively, and the base rotates. The machine shell of the two main bodies can still be kept in a relatively stable state after the folding or unfolding driving force is cancelled, so that the performance of labor saving and convenient use is improved.

Description

Folding device and electronic equipment

Technical Field

The application relates to the field of communication equipment, in particular to a folding device and electronic equipment.

Background

At present, in a foldable mobile phone, a display screen of the mobile phone is folded in half, so that the mobile phone is miniaturized, and a user can conveniently carry the mobile phone. However, since the display screen of the foldable mobile phone has a bending stress, after the mobile phone is folded and unfolded, the unfolding driving force is cancelled, and the bending stress of the display screen can restore the mobile phone to the bending state, that is, after the unfolding driving force is cancelled, the mobile phone cannot be kept in the completely unfolded state, so that the experience performance of the mobile phone is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a folding device, wherein the folding device comprises a rotating shaft base, two main bodies arranged on two opposite sides of the rotating shaft base and a synchronous transmission assembly arranged on the rotating shaft base; each main body is provided with a rotating part which is rotatably connected with the rotating shaft base and a shell which is fixedly connected with the rotating part, and the two rotating parts respectively drive the two shells to be mutually unfolded or closed; the end part of at least one rotating piece which is rotatably connected with the rotating shaft base is provided with a positioning groove; the rotating shaft base comprises a base, an elastic part and a sliding buckle, the base is rotatably connected with the two rotating parts, the sliding buckles are both slidably connected with the base, the elastic part is elastically connected with the base and the sliding buckles and used for providing abutting force for elastically abutting the sliding buckles against the positioning grooves so as to limit the rotating parts to rotate relative to the base; the synchronous transmission assembly is connected with the two rotating pieces so that the two rotating pieces can rotate synchronously relative to the base.

The embodiment of the application provides an electronic device, wherein, electronic device includes foretell folding device, electronic device still includes flexible display screen, flexible display screen includes two parts that can coincide relatively or expand, two parts are fixed in respectively two casings can be followed two casing rotates each other and closes or expand.

The folding device and the electronic equipment that this application embodiment provided, through the pivot base includes elastic component and slip buckle, the elastic component is right the elastic force is applyed to the slip buckle, so that but slip buckle elasticity support hold in rotate on the piece, it is in to rotate the piece the support of slip buckle holds down, can keep relatively the fixed state of base has realized two the casing of main part still can keep in relatively stable state after removing folding or expansion drive power, improves and shows laborsaving, the performance of facilitating the use.

Drawings

In order to more clearly illustrate the technical solution of the application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded schematic view of an electronic device provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a hinge base of an electronic device according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional diagram of an electronic device provided by an embodiment of the application;

FIG. 4 is a schematic diagram of a portion of an electronic device provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a portion of an electronic device provided by an embodiment of the present application;

fig. 6 is a partial schematic view of an electronic device provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments.

Referring to fig. 1, fig. 2 and fig. 3, the present application provides an electronic device 1000, where the electronic device 1000 includes a folding device 100 and a flexible display 200. The flexible display 200 includes a first portion 210 and a second portion 220 folded or unfolded with respect to the first portion 210, and a bendable portion 230 connected between the first portion 210 and the second portion 220. The folding device 100 includes a rotation shaft base 110, two bodies 120 disposed on opposite sides of the rotation shaft base 110, and a synchronous transmission assembly 130 disposed on the rotation shaft base 110. Each of the main bodies 120 is provided with a rotating member 121 rotatably connected to the rotating shaft base 110 and a housing 122 fixedly connected to the rotating member 121, and the two rotating members 121 respectively drive the two housings 122 to be opened or closed. The two housings 122 are respectively and fixedly connected to the first portion 210 and the second portion 220, so as to drive the flexible display screen 200 to fold or unfold.

At least one of the rotating members 121 is rotatably connected to the end of the rotating shaft base 110 and has a positioning groove 1211. The rotating shaft base 110 includes a base 111, an elastic member 112 and a sliding buckle 113, the base 111 is rotatably connected to the two rotating members 121, the sliding buckle 113 is slidably connected to the base 111, the elastic member 112 is elastically connected to the base 111 and the sliding buckle 113, so as to provide a supporting force for elastically supporting the sliding buckle 113 to the positioning groove 1211, so as to limit the rotating members 121 to rotate relative to the base 111. The synchronous transmission assembly 130 is connected to the two rotating members 121, so that the two rotating members 121 rotate synchronously relative to the base 111.

It can be understood that the two main bodies 120 can respectively carry the first portion 210 and the second portion 220, and the two main bodies 120 rotate relative to the hinge base 110 to drive the first portion 210 and the second portion 220 to rotate relative to the hinge base 110, so that the first portion 210 and the second portion 220 are folded or unfolded, so that the electronic device 1000 can assume two use states, i.e., a folded state or an unfolded state. The electronic device 1000 may be a mobile phone, a tablet computer, or a notebook computer.

The rotating shaft base 110 comprises an elastic element 112 and a sliding buckle 113, the elastic element 112 applies elastic acting force to the sliding buckle 113, so that the sliding buckle 113 can be elastically abutted against the rotating element 121, and the rotating element 121 can keep a fixed state relative to the base 111 under the abutting action of the sliding buckle 113, so that the two shells 122 of the main body 120 can still keep a relatively stable state after folding or unfolding driving force is removed, and the performances of labor saving and convenient use are improved.

In this embodiment, the main body 120 has a first edge 123 and a second edge 124 opposite to the first edge 123, and the second edge 124 is adjacent to the hinge base 110. The first edge 123 extends along a central axis parallel to the longitudinal direction of the spindle base 110. The second edge 124 is parallel to the first edge 123. The first edges 123 of the two bodies 120 may be fixedly connected to the edges of the first portion 210 and the second portion 220, respectively. The first edges 123 of the two bodies 120 may also be the edges that slidably connect the first portion 210 and the second portion 220, respectively. The main body 120 further includes a cover 125 fixed to the housing 122, and an accommodating space is provided between the housing 122 and the cover 125, and the accommodating space can accommodate functional devices. The functional device can be a battery, a circuit board, a connector, a memory, a processor, a camera, a fingerprint module, a loudspeaker, a receiver and the like. The rotating member 121 is fixed between the cover plate 125 and the housing 122. The turning member 121 is proximate to the second edge 124. Each of the main bodies 120 may be provided with a plurality of the rotating members 121, and the plurality of the rotating members 121 may be arranged at equal intervals on the second edge 124. The rotation members 121 disposed at both sides of the rotation shaft base 110 may be arranged in a staggered manner. The cover 125 may support the first portion 210 or the second portion 220 of the flexible display 200. The rotation axis of the rotation element 121 is parallel to the second edge 124, and the rotation element 121 drives the housing 122 and the cover 125 to rotate relative to the rotation shaft base 110.

In this embodiment, the rotation shaft base 110 has two side portions rotatably connected to the two main bodies 120, respectively. The hinge base 110 substantially forms a hinge structure of the two bodies 120, so that the two bodies 120 can be turned over each other through the hinge base 110. The rotation shaft base 110 has a rectangular rod shape. The length direction of the rotation shaft base 110 is parallel to the rotation axis direction of the rotation member 121. The base 111 is provided with a rotation shaft housing 1111 and a bearing assembly 1112 fixed in the rotation shaft housing 1111. The bearing assemblies 1112 are rotatably engaged with the rotation shafts of the two bodies 120, respectively. The spindle housing 1111 secures and shields the bearing assembly 1112. The rotating shaft housing 1111 includes a rotating shaft base plate 1113 and two side plates 1114 fixed to two opposite long sides of the rotating shaft base plate 1113. When the two main bodies 120 are overlapped with each other, the housings 122 of the two main bodies 120 are substantially spliced with the two side plates 1114, respectively, so that the hinge housing 1111 substantially shields the bendable portion 230 of the flexible display 200; when the two main bodies 120 are unfolded, the housings 122 of the two main bodies 120 are substantially spliced and substantially cover the hinge housing 1111, so as to simplify the appearance structure of the electronic device 1000 in a folded state. The side plate 1114 defines a notch 1115, and the rotating member 121 can pass through the notch 1115, so that the end of the rotating member 121 remote from the housing 122 can be received in the rotating shaft housing 1111, so that the end of the rotating member 121 is rotatably coupled to the bearing assembly 1112. When the two main bodies 120 are unfolded relatively, the rotation pieces 121 are partially embedded in the notches 1115, so that the two rotation pieces 121 are convenient to be flush, and the two main bodies 120 can be completely unfolded.

In this embodiment, the positioning slot 1211 is disposed on an outer wall of the rotating member 121 substantially perpendicular to the longitudinal direction of the rotating shaft base 110. The electronic device 1000 may be configured such that the positioning groove 1211 is disposed on the rotating member 121 of one of the main bodies 120, or the positioning grooves 1211 are disposed on both of the rotating members 121 of two of the main bodies 120. Of course, in other embodiments, the rotating member 121 may also be provided with a positioning boss, and the sliding buckle 113 is provided with a groove matching with the positioning boss, so as to realize that the rotating member 121 is limited to rotate by the sliding buckle 113.

In this embodiment, the sliding fastener 113 can slide relative to the base 111 along a direction parallel to the rotation axis of the rotating member 121. The sliding direction of the sliding fastener 113 is axially staggered from the rotating shaft of the rotating member 121, so that the sliding fastener 113 can limit the rotating member 121 to rotate relative to the base 111. One end of the elastic member 112 is fixed in the rotation shaft housing 1111, and the other end is fixedly connected with the sliding buckle 113. The elastic restoring force of the elastic member 112 is transmitted to the slide fastener 113 so that the end of the slide fastener 113 can be fastened into the positioning groove 1211 under the elastic force. The sliding buckle 113 may be disposed on the rotating shaft base 110 corresponding to the rotating member 121 of one of the main bodies 120, and the synchronous transmission assembly 130 limits the two main bodies 120 to synchronously rotate or synchronously stop rotating, so as to simplify the structure of the rotating shaft base 110, reduce the weight of the rotating shaft base 110, and increase the internal usage space. The rotating shaft base 110 may also be provided with the sliding fasteners 113 corresponding to the rotating members 121 of the two main bodies 120, so as to increase the positioning stability of the two main bodies 120. Of course, in other embodiments, the sliding direction of the sliding buckle 113 relative to the base 111 may also be perpendicular to the rotating shaft direction of the rotating member 121.

Further, referring to fig. 4, 5 and 6, the bearing assembly 1112 includes two bearing blocks 1116, and the bearing blocks 1116 are arranged in the spindle housing 1111 along the length direction of the spindle base 110. Each of the bearing blocks 1116 rotatably connects the rotating members 121 on both sides. The bearing block 1116 is provided with a rotating shaft groove 1117 and a sliding hole 1118 communicated with the rotating shaft groove 1117, and the end of the rotating member 121 far away from the shell 122 is provided with a rotating wheel 1212. The rotating wheel 1212 is rotatably engaged with the rotating shaft groove 1117, and the positioning groove 1211 is disposed on the rotating wheel 1212. The slide fastener 113 is slidably engaged with the slide hole 1118. The end of the sliding buckle 113 can extend out of the sliding hole 1118 and abut against the positioning slot 1211 of the rotating wheel 1212, so as to limit the rotation of the rotating wheel 1212 relative to the bearing block 1116.

In this embodiment, the bearing block 1116 has two parallel rotating shaft grooves 1117, and the two rotating shaft grooves 1117 are respectively rotatably engaged with the rotating members 121 on both sides of the rotating shaft base 110. The two rotating shaft grooves 1117 are arranged side by side along the length direction of the rotating shaft base 110. The slide hole 1118 communicates with one of the rotary shaft grooves 1117. The positioning slot 1211 is formed on the rotating member 121 adjacent to the sliding hole 1118. The rotating wheel 1212 is a semi-circular wheel. The positioning slot 1211 is disposed on a sidewall of the rotating wheel 1212. The positioning slot 1211 is located substantially near an end of the rotating wheel 1212. When the rotating member 121 drives the two housings 122 to be in a mutually expanded state, the sliding fastener 113 is clamped in the positioning slot 1211. The sliding buckle 113 limits the rotation of the rotating wheel 1212, so that the two housings 122 maintain the mutually unfolded state. One end of the sliding buckle 113 can pass through the sliding hole 1118. One end of the sliding buckle 113 connected with the elastic member 112 is located outside the rotating shaft groove 1117. The inner side of the rotating shaft housing 1111 is provided with a stop 1119 opposite to the bearing block 1116. One end of the elastic member 112 is fixed to the stopper 1119, and the other end is fixedly connected to the sliding buckle 113. The inner side wall of the sliding hole 1118 slidably guides the sliding buckle 113. Of course, in other embodiments, the bearing block 1116 may also be provided with two sliding holes 1118 respectively communicating with the two rotating shaft grooves 1117, and the bearing block 1116 is provided with sliding buckles 113 on two sides of the rotating shaft base 110 in the length direction, and the two sliding buckles 113 respectively position the two rotating wheels 1212 of the rotating part 121, so as to increase the stability of the electronic device 1000 in the unfolded state. Of course, in other embodiments, when the two housings 122 are in the closed state, the sliding buckle 113 is clamped into the positioning slot 1211, and the sliding buckle 113 restricts the rotation of the housing 122 relative to the rotation shaft base 110, so that the electronic device 1000 is kept in the closed state.

Further, the inner wall of the rotating shaft groove 1117 is provided with a guide groove 1120 extending along an arc curve, the side wall of the rotating wheel 1212 is provided with a guide flange 1213 extending along an arc curve, the guide flange 1213 is in sliding fit with the guide groove 1120 to guide the rotating wheel 1212 to rotate relative to the bearing block 1116, the sliding hole 1118 is communicated with the guide groove 1120, and the positioning groove 1211 is disposed on the guide flange 1213.

In this embodiment, the guide groove 1120 is provided on a side wall of the rotation shaft groove 1117 substantially perpendicular to the longitudinal direction of the rotation shaft base 110. The guide groove 1120 extends along a semicircular curve. The guide grooves 1120 are formed in two opposite side walls of the rotating shaft groove 1117. The guide flanges 1213 are provided on both opposite side walls of the turning wheel 1212. The guide flanges 1213 are provided at the edges of the side walls of the rotating wheel 1212. The positioning slot 1211 is disposed adjacent to the guide flange 1213 of the slide hole 1118. The guide flange 1213 of the rotating wheel 1212 is positioned by the sliding buckle 113, so that the sliding buckle 113 is far away from the central axis of the rotating wheel 1212, thereby increasing the supporting torque of the sliding buckle 113 on the rotating wheel 1212, reducing the supporting force of the sliding buckle 113 on the rotating wheel 1212, and avoiding the damage of the sliding buckle 113 and the rotating wheel 1212. Of course, in other embodiments, the positioning slot 1211 can also be disposed on the side of the guiding flange 1213 close to the geometric central axis of the rotating wheel 1212.

Furthermore, a limit flange 1131 is disposed on the peripheral side of the slide fastener 113, one end of the elastic member 112 abuts against the limit flange 1131, and the elastic member 112 provides an elastic force for the limit flange 1131 to abut against the bearing block 1116, so that the end of the slide fastener 113 away from the elastic member 112 is kept clamped into the positioning slot 1211.

In this embodiment, the limiting flange 1131 is disposed between two ends of the sliding buckle 113. The elastic member 112 is a rectangular spring. The end of the elastic member 112 away from the stop 1119 is sleeved on the end of the sliding buckle 113 away from the positioning slot 1211, so that the limiting flange 1131 can be abutted against the bearing block 1116. The stop flange 1131 has an outer diameter greater than an inner diameter of the slide hole 1118 to limit the length of the slide fastener 113 extending out of the slide hole 1118. The length of the sliding buckle 113 extending out of the sliding hole 1118 is smaller than the depth of the positioning slot 1211, so that the sliding buckle 113 is prevented from applying a force on the rotating wheel 1212 in parallel with the axial direction of rotation of the rotating wheel 1212, and the rotating wheel 1212 is prevented from being displaced in a direction parallel to the length direction of the rotating shaft base 110. Of course, in other embodiments, the outer diameter of the slide fastener 113 away from the positioning slot 1211 may be larger than the inner diameter of the slide hole 1118 to limit the length of the slide hole 1118 extending out of the slide hole 1118.

In this embodiment, the end of the sliding buckle 113 extending out of the sliding hole 1118 is a wedge-shaped end. Specifically, the end of the sliding buckle 113 extending out of the sliding hole 1118 is a hemispherical end. The length of the slide fastener 113 extending out of the slide hole 1118 is approximately equal to the radius of the end of the slide fastener 113 extending out of the slide hole 1118. In the process of rotating the two housings 122 from the closed state to the open state, the positioning slot 1211 of the rotating wheel 1212 tends to rotate to a position opposite to the sliding hole 1118, and the end of the sliding buckle 113 slides into the positioning slot 1211 under the guiding action of the hemispherical curved surface, so as to limit the rotation of the rotating wheel 1212 by the sliding buckle 113. When the two housings 122 rotate from the open state to the closed state, the sliding buckle 113 slides out of the positioning groove 1211 under the guiding action of the hemispherical curved surface at the end portion, so that the sliding buckle 113 unlocks the rotating wheel 1212, and the rotating wheel 1212 can rotate relative to the rotating shaft base 110.

In another embodiment, a plurality of positioning slots 1211 are formed on the guide flange 1213 of the rotating wheel 1212, and the plurality of positioning slots 1211 may be arranged at equal intervals. When the sliding buckle 113 is engaged with one of the positioning slots 1211, the sliding buckle 113 limits the rotation of the rotating wheel 1212 relative to the rotation shaft base 110, so that the two housings 122 can maintain a stable state with various angles, and the electronic device 1000 can present various use states.

Further, the synchronous transmission assembly 130 is provided with two synchronous connecting pieces 131, one end of each synchronous connecting piece 131 is rotatably connected to the base 111, the other end of each synchronous connecting piece 131 is slidably connected to the rotating piece 121, one end of each synchronous connecting piece 131 rotatably connected to the base 111 is provided with a transmission part 132, and the transmission parts 132 of the two synchronous connecting pieces 131 are mutually connected to realize that the two synchronous connecting pieces 131 synchronously rotate relative to the base 111.

In this embodiment, each of the synchronous transmission components 130 is correspondingly connected to two of the rotating members 121 rotatably connected to each of the bearing blocks 1116. The two synchronous connecting pieces 131 of the synchronous transmission assembly 130 are respectively connected to the two rotating pieces 121. Specifically, the synchronizing connector 131 is in the shape of a connecting rod. The transmission parts 132 of the synchronous connecting pieces 131 are transmission gears, and the transmission parts 132 of the two synchronous connecting pieces 131 are meshed with each other to realize synchronous rotation of the two synchronous connecting pieces 131 relative to the bearing block 1116. Each bearing block 1116 is provided with a receiving groove 1121 between the two rotating shaft grooves 1117. The transmission parts 132 of the two synchronous connecting pieces 131 are received in the receiving grooves 1121 to ensure the synchronous rotation stability of the synchronous connecting pieces 131. The transmission portion 132 is rotatably connected to the bearing block 1116. The geometric central axis of the transmission part 132 is parallel to the geometric central axis of the rotation member 121. The geometric center axis of the transmission portion 132 is offset from the geometric center axis of the rotating wheel 1212. Of course, in other embodiments, the transmission parts 132 may also be transmission rollers, and the two transmission parts 132 rotate synchronously through friction force.

Further, the rotating member 121 is provided with a receiving groove 1214, one end of the synchronous link 131 is received in the receiving groove 1214, and one end of the synchronous link 131 is slidably engaged with the receiving groove 1214.

In this embodiment, the accommodating groove 1214 extends from an end of the rotor 121 away from the housing 122 toward an end connected to the housing 122. After the rotating member 121 and the rotating shaft base 110 are assembled, the receiving groove 1214 is substantially opposite to the receiving groove 1121 of the bearing block 1116. The receiving groove 1214 has two inner sidewalls substantially perpendicular to the length direction of the spindle base 110. The two inner sidewalls slidably guide the timing connection member 131. The sliding direction of the synchronous connecting piece 131 relative to the rotating piece 121 is approximately inclined relative to the cover plate 125 of the main body 120, so that the two synchronous connecting pieces 131 drive the two main bodies 120 to rotate synchronously. Of course, in other embodiments, it is also possible that the rotating member 121 is provided with a sliding rail, and the synchronous connecting member 131 is provided with a sliding guiding groove in sliding fit with the sliding rail, so as to realize that the rotating member 121 slides relative to the synchronous connection.

More specifically, the rotation member 121 is provided with a connection block 1215 opposite to the rotation wheel 1212. The connecting block is fixedly connected with the casing 122 and the cover plate 125. The receiving groove 1214 is opened in the connecting block 1215. The receiving groove 1214 and the rotating wheel 1212 are staggered, so that the synchronous connecting piece 131 can be located at one side of the rotating wheel 1212, the synchronous connecting piece 131 drives the main body 120 to rotate, the structure of the rotating shaft base 110 is reasonably optimized, and the space of the rotating shaft base 110 is saved.

Further, a sliding guide groove 1216 is formed on an inner wall of the receiving groove 1214, and a sliding pin slidably engaged with the sliding guide groove 1216 is disposed at one end of the synchronizing link 131.

In this embodiment, the sliding guide groove 1216 is provided in an inner wall of the housing groove 1214 that slidably guides the synchronizing link 131. The two sliding pins are respectively disposed at both sides of the end of the timing link 131. The sliding guide groove 1216 is provided with two opposite closed ends, and the two closed ends limit the sliding pin, so as to prevent the synchronous connection element 131 from being separated from the rotating element 121, and prevent the opening angle or the closing angle of the main body 120 from exceeding a preset opening angle or a preset closing angle, thereby avoiding the situation that the flexible display screen 200 is cracked or bent due to sound emission, and ensuring the safety of the flexible display screen 200.

The foregoing is a preferred embodiment of the application, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the application principle, and these improvements and modifications are also considered as the protection scope of the application.

Claims

1. A folding device is characterized by comprising a rotating shaft base, two main bodies arranged on two opposite sides of the rotating shaft base and a synchronous transmission assembly arranged on the rotating shaft base; each main body is provided with a rotating part which is rotatably connected with the rotating shaft base and a shell which is fixedly connected with the rotating part, and the two rotating parts respectively drive the two shells to be mutually unfolded or closed; the end part of at least one rotating piece which is rotatably connected with the rotating shaft base is provided with a positioning groove; the rotating shaft base comprises a base, an elastic part and a sliding buckle, the base is rotatably connected with the two rotating parts, the sliding buckles are both slidably connected with the base, the elastic part is elastically connected with the base and the sliding buckles and used for providing abutting force for elastically abutting the sliding buckles against the positioning grooves so as to limit the rotating parts to rotate relative to the base; the synchronous transmission assembly is connected with the two rotating pieces so that the two rotating pieces can rotate synchronously relative to the base.

2. The folding device of claim 1, wherein the base has a bearing block, the bearing block has a rotation shaft groove and a sliding hole communicating with the rotation shaft groove, the end of the rotation member away from the housing has a rotation wheel, the rotation wheel is rotatably engaged with the rotation shaft groove, the positioning groove is disposed on the rotation wheel, the sliding buckle is slidably engaged with the sliding hole, and the end of the sliding buckle can extend out of the sliding hole and abut against the positioning groove of the rotation wheel to limit the rotation of the rotation wheel relative to the bearing block.

3. The folding apparatus as claimed in claim 2, wherein the inner wall of the rotation shaft groove is provided with a guide groove extending along a circular arc curve, the side wall of the rotation wheel is provided with a guide flange extending along a circular arc curve, the guide flange is slidably engaged with the guide groove to guide the rotation of the rotation wheel with respect to the bearing block, the slide hole communicates with the guide groove, and the positioning groove is provided in the guide flange.

4. The folding device of claim 3, wherein a limiting flange is disposed on a peripheral side of the sliding buckle, one end of the elastic member abuts against the limiting flange, and the elastic member provides an elastic force for the limiting flange to abut against the bearing block, so that an end portion of the sliding buckle away from the elastic member is kept clamped into the positioning groove.

5. The folding apparatus of claim 2 wherein the end of the slide fastener extending through the slide aperture is a wedge shaped end.

6. The folding device of any one of claims 1 to 5, wherein when the two housings are rotated to the unfolded state, the end of the sliding buckle far away from the elastic member is snapped into the positioning groove.

7. The folding device according to any one of claims 1 to 5, wherein the synchronous transmission assembly is provided with two synchronous connecting members, one end of each synchronous connecting member is rotatably connected with the base, the other end of each synchronous connecting member is slidably connected with the rotating member, one end of each synchronous connecting member rotatably connected with the base is provided with a transmission part, and the transmission parts of the two synchronous connecting members are mutually connected to realize synchronous rotation of the two synchronous connecting members relative to the base.

8. The folding apparatus of claim 7, wherein the rotating member has a receiving slot, one end of the synchronizing link is received in the receiving slot, and one end of the synchronizing link is slidably engaged with the receiving slot.

9. The folding apparatus as claimed in claim 8, wherein the inner wall of the receiving groove is formed with a sliding guide groove, and one end of the synchronous connecting member is formed with a sliding pin slidably engaged with the sliding guide groove.

10. An electronic device, comprising the folding apparatus of any one of claims 1 to 9, wherein the electronic device further comprises a flexible display, and the flexible display comprises two parts that can be folded or unfolded relatively, and the two parts are respectively fixed to the two housings and can be closed or unfolded along with the mutual rotation of the two housings.