Electronic equipment support

Abstract

The utility model relates to an electronic equipment support which comprises a shell, a middle key, a back key, a first sliding assembly, a variable speed transmission assembly and a first clamping arm, the variable speed transmission assembly comprises a small gear piece, a large gear piece, a driving swing arm and an elastic piece which are rotationally connected with the shell, and the middle key and the back key are movably connected to the shell and exposed out of the outer surface of the shell. The first sliding assembly is slidably connected to the shell, and the first clamping arm is slidably connected to the shell. The first sliding assembly, the small gear piece, the large gear piece and the driving swing arm are sequentially in transmission connection, the addendum circle radius of the large gear piece is larger than that of the small gear piece, and the driving swing arm is connected with the first clamping arm through an elastic piece; the driving swing arm can be switched between a first angle position and a second angle position under the action of the large gear piece, so that the elastic piece pulls the first clamp to be close to or away from the middle key. According to the electronic equipment support, it is guaranteed that the electronic equipment is stably clamped, and meanwhile the operating force and the pressing stroke needed by a user are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic devices and their auxiliary accessories, and in particular to an electronic device bracket. Background Technology

[0002] Currently, most stand products on the market for electronic devices such as mobile phones and tablets use elastic clamping structures to secure and release the devices. Compared to traditional fixing methods that rely on gravity or friction, elastic clamping structures provide a more stable clamping force, ensuring that the device is less likely to loosen or fall off in various usage scenarios. Typical designs utilize the rebound force of springs or elastic materials, allowing users to quickly release the clamping mechanism by pressing or flicking a button, thus enabling the device to be placed or removed. However, existing elastic clamping solutions still have significant limitations.

[0003] First, most products only support unidirectional elastic operation, meaning they can only support one-button opening or one-button closing, and cannot perform both functions simultaneously. For example, some brackets rely on elasticity to automatically close the clamping arm, but users still need to manually pry it open and keep it in the unfolded state when opening; other products use an elasticity-automatic unfolding design, but users need to manually press the clamping arm to lock it when closing. This unidirectional elastic mechanism makes user operation inconvenient, requiring additional steps to complete the entire opening and closing process, affecting efficiency. Second, existing elastic clamping structures often require a large operating stroke and high pressing force to accumulate and release the elasticity. This not only increases the user's operational burden but also makes the product structure bulky, affecting overall aesthetics and portability. In addition, manually resetting the elasticity may lead to unstable clamping force, and after prolonged use, spring fatigue or a decrease in clamping force may occur, thus affecting the device's fixation effect.

[0004] Therefore, there is an urgent need for an electronic device holder that can simultaneously achieve one-click opening and quick closing clamping, ensuring stable clamping of electronic devices while optimizing the user experience and reducing the operating force and travel required by the user. Utility Model Content

[0005] Therefore, it is necessary to provide an electronic device holder that can simultaneously achieve one-click opening and quick closing clamping, ensuring stable clamping of electronic devices while reducing the operating force and travel required by the user.

[0006] An embodiment of this utility model provides an electronic device bracket, including a housing, a middle button, a back button, a first sliding assembly, a speed transmission assembly, and a first clamping arm. The speed transmission assembly includes a small gear, a large gear, a drive swing arm, and an elastic element that are rotatably connected to the housing. The middle button and the back button are movably connected to the housing and exposed on the outer surface of the housing. The first sliding assembly is slidably connected to the housing, and the first clamping arm is slidably connected to the housing.

[0007] The middle key is driven to the first sliding component to move the first sliding component along the first direction, thereby driving the pinion. The back key is driven to the first sliding component to move the first sliding component in the opposite direction of the first direction. The first sliding component, the pinion, the large gear, and the driving swing arm are driven to each other in sequence. The tooth tip circle radius of the large gear is larger than that of the pinion. The driving swing arm is connected to the first clamping arm through the elastic element.

[0008] The drive arm can change between a first angular position and a second angular position under the action of the large gear component, so that the elastic element pulls the first clamp closer to or away from the central key.

[0009] In one embodiment, the transmission assembly includes a driven swing arm rotatably connected to the housing, an elastic element connecting the driving swing arm and the driven swing arm, and the driven swing arm rotatably connected to the first clamping arm.

[0010] In one embodiment, the rotation center of the driven swing arm is collinear with the rotation center of the driving swing arm, the elastic element is a telescopic spring, the elastic element is connected to the driven fixing part of the driven swing arm, the elastic element is connected to the driving fixing part of the driving swing arm, and the distance from the rotation center of the driving swing arm to the driving fixing part is greater than the distance from the rotation center of the driven swing arm to the driven fixing part.

[0011] In one embodiment, the first sliding component includes a toothed condition and a first reset member, the toothed condition meshing with the pinion and abutting against the back key drive, and the first reset member connecting the toothed condition and the housing to drive the toothed condition to slide along the first direction.

[0012] In one embodiment, the first sliding component includes a locking member rotatably connected to the toothed condition. After the back key actuates the toothed condition to move it in the opposite direction of the first direction, the locking member can lock the back key. The middle key can actuate the locking member to disengage it from the toothed condition.

[0013] In one embodiment, the locking member includes a latching part and a pressing part connected together. The latching part is connected to the toothed condition by a second reset member. The second reset member drives the latching part to rotate toward the back key to lock the back key. The pressing part is located below the middle key. The middle key can act on the pressing part to drive the latching part to rotate.

[0014] In one embodiment, the pressing part and the latching part are connected by a rotating rod, the rotating rod is rotatably connected to the toothed condition, the latching part is located inside the toothed condition and between the second reset member and the back key, and the pressing part is located outside the toothed condition.

[0015] In one embodiment, the center key is provided with a slider, a third reset member, and a fourth reset member. The slider is slidably connected to the center key along the first direction. The third reset member is connected between the slider and the center key to drive the slider to move along the first direction. The pressing part is located below the slider, and the slider is used to act on the pressing part. The fourth reset member is connected between the center key and the housing, and the fourth reset member is used to drive the center key away from the housing.

[0016] In one embodiment, the back key has a first conductive ramp, and the tooth condition has a second conductive ramp. The first conductive ramp and the second conductive ramp are parallel and are inclined to the sliding direction of the tooth condition and the moving direction of the back key.

[0017] In one embodiment, the electronic device bracket further includes a second clamping arm and a transmission gear slidably connected to the housing. The first clamping arm and the second clamping arm are located on opposite sides of the housing. The sliding directions of the first clamping arm and the second clamping arm are parallel. Both the first clamping arm and the second clamping arm are provided with rack structures. The rack structures on the first clamping arm and the second clamping arm face each other and are meshed and connected by the transmission gear.

[0018] The electronic device bracket provided in this application uses a speed-changing combination structure of small and large gear components to achieve short-distance movement control of the back and middle buttons, enabling the first clamping arm to clamp and move a large distance. This allows for simultaneous one-button opening and quick closing of the clamp, ensuring stable clamping of the electronic device while reducing the operating force and pressing stroke required by the user. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of an electronic device bracket provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of another structure of an electronic device bracket provided in one embodiment of this application;

[0022] Figure 3 This is a partial structural schematic diagram of an electronic device bracket provided in an embodiment of this application;

[0023] Figure 4A cross-sectional view of an electronic device bracket provided in an embodiment of this application;

[0024] Figure 5 This is a partial structural schematic diagram of an electronic device bracket provided in an embodiment of this application;

[0025] Figure 6 This is a partial structural schematic diagram of an electronic device bracket provided in an embodiment of this application.

[0026] Reference numerals: Housing 10; Middle key 20; Slider 21; Slide rod 22; Third reset component 23; Fourth reset component 24; Back key 30; First transmission ramp 31; First sliding assembly 40; Gear condition 41; Second transmission ramp 411; First reset component 42; Locking component 43; Buckle part 431; Pressing part 432; Rotating rod 433; Second reset component 44; First clamping arm 51; Second clamping arm 52; Transmission gear 53; Speed ​​transmission assembly 60; Small gear component 61; Large gear component 62; Drive swing arm 63; Driven swing arm 64; Elastic component 65. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] Currently, most stand products on the market for mobile phones, tablets, and other electronic devices use elastic clamping structures to secure and release the devices. Compared to traditional fixing methods that rely on gravity or friction, elastic clamping structures provide a more stable clamping force, ensuring that the device is less likely to loosen or fall off in various usage scenarios. Typical designs utilize the rebound force of springs or elastic materials, allowing users to quickly release the clamping mechanism by pressing or flicking a button, enabling device placement and removal. However, existing elastic clamping solutions still have significant limitations. First, most products only achieve unidirectional elastic operation, supporting only one-button opening or one-button closing, and cannot simultaneously support both functions. For example, some stands rely on elasticity to automatically close the clamping arm, but users still need to manually pry it open and maintain the unfolded state when opening; other products use an elastic automatic unfolding design, but require manual pressing of the clamping arm to lock it when closing. This unidirectional elastic mechanism makes user operation inconvenient, requiring additional steps to complete the full opening and closing process, affecting usage efficiency. Secondly, existing elastic clamping structures often require a large operating stroke and high pressing force to accumulate and release the elastic force. This not only increases the user's operational burden but also results in a bulky product structure, affecting overall aesthetics and portability. Furthermore, manually resetting the elastic force can lead to unstable clamping force, and after prolonged use, spring fatigue or a decrease in clamping force can easily occur, thus affecting the device's fixation effectiveness.

[0032] In this regard, refer to Figures 1 to 6This application provides an electronic device bracket, which includes a housing 10, a middle button 20, a back button 30, a first sliding assembly 40, a speed transmission assembly 60, and a first clamping arm 51. The speed transmission assembly 60 includes a small gear 61, a large gear 62, a drive swing arm 63, and an elastic element 65 that are rotatably connected to the housing 10. The middle button 20 and the back button 30 are movably connected to the housing 10 and exposed on the outer surface of the housing 10. The first sliding assembly 40 is slidably connected to the housing 10, and the first clamping arm 51 is slidably connected to the housing 10.

[0033] The middle button 20 and the back button 30 are located on opposite sides of the housing 10 along its thickness direction and can be pressed relative to the thickness direction of the housing 10. Specifically, the middle button 20 has several latches, which engage with the housing 10 and allow for a pressing stroke of approximately 1mm to 3mm along the pressing direction, i.e., the direction in which the middle button 20 is pressed into the housing 10. A fourth reset member 24 is provided between the bottom of the middle button 20 and the housing 10, which is used to push the middle button 20 back to its original position after it is released from being pressed. The fourth reset member 24 is used to drive the middle button 20 away from the housing 10. The fourth reset member 24 can be, for example, an elastic structure such as a telescopic spring, a torsion spring, or a spring sheet. When the user places the electronic device in the middle button 20 position and presses down the middle button 20, the first clamping arm 51 will move closer to the middle button 20 to hold the electronic device, thereby achieving clamping. The back button 30 can also be equipped with multiple latches to connect with the housing 10 and prevent it from falling out. Alternatively, a flange can be provided on the periphery of the back button 30, making the diameter of the hole in the housing 10 through which the back button 30 passes smaller than the flange, thereby limiting the position of the back button 30. The pressing stroke of the back button 30 can be approximately 5mm to 8mm. When the user presses the back button 30, the first clamping arm 51 moves outward away from the middle button 20, entering the open state, allowing the user to remove the electronic device located on the middle button 20.

[0034] The first clamping arm 51 is slidably connected to the housing 10. Specifically, it can slide relative to the housing 10 along a first direction and its opposite direction. The portion of the first clamping arm 51 located outside the housing 10 has an L-shaped or approximately L-shaped structure. This L-shaped structure is located on the side of the housing 10 where the center button 20 is located, and it is used to clamp the mobile phone located at the center button 20. It should be noted that the electronic device bracket in this embodiment may have only one clamping arm, such as the first clamping arm 51, or it may have two or more clamping arms, such as the second clamping arm 52 described below. When there is only one clamping arm, a fixed L-shaped protruding block can be provided on the housing 10 to cooperate with the movable clamping arm. That is, one side of the electronic device can abut against the L-shaped protruding block, and the other side is abutted by the first clamping arm 51 to achieve clamping and fixation. Therefore, the electronic device bracket may further include a second clamping arm 52 and a transmission gear 53 slidably connected to the housing 10. The first clamping arm 51 and the second clamping arm 52 are located on opposite sides of the housing 10, and their sliding directions are parallel. Both the first clamping arm 51 and the second clamping arm 52 are provided with rack structures. The rack structures on the first clamping arm 51 and the second clamping arm 52 face each other and are meshed and connected by the transmission gear 53, which is located between the rack structures of the two. In this way, the second clamping arm 52 can move in the opposite direction to the first clamping arm 51 under the transmission action of the transmission gear, thereby cooperating to realize the release and clamping operation of the electronic device. The electronic device can be, for example, a mobile phone, tablet computer, e-reader, or other common portable mobile electronic devices.

[0035] The middle key 20 is driven to the first sliding component 40 so that the first sliding component 40 moves in the first direction, thereby driving the pinion 61. The back key 30 is driven to the first sliding component 40 so that the first sliding component 40 moves in the opposite direction of the first direction. The first sliding component 40, the pinion 61, the large gear 62, and the driving swing arm 63 are driven to each other in sequence. The tooth tip circle radius of the large gear 62 is larger than that of the pinion 61. The driving swing arm 63 is connected to the first clamping arm 51 through the elastic member 65.

[0036] The first sliding component 40 can be any common sliding mechanism that enables force transmission. It is used to convert the travel of the back key 30 along the thickness direction of the housing 10 into a travel along a direction parallel to the first direction, thereby driving the transmission component 60. In addition, a rack structure can be provided on the first sliding component 40 to cooperate with the pinion 61.

[0037] The drive arm 63, under the action of the large gear 62, can change between a first angular position and a second angular position, so that the elastic member 65 pulls the first clamp closer to or away from the center key 20. For example, the angle between the first angular position and the second angular position is generally greater than 90°.

[0038] The electronic device bracket provided in this application uses a speed-changing combination structure of a small gear 61 and a large gear 62 to control the drive arm 63 and thus control the first clamping arm 51. This enables the short-distance movement of the back button 30 and the middle button 20 to control the long-distance clamping movement of the first clamping arm 51, allowing for simultaneous one-button opening and quick closing of the clamp. While ensuring stable clamping of the electronic device, it reduces the operating force and pressing stroke required by the user.

[0039] The end of the drive arm 63 can be equipped with a gear structure that meshes with the large gear 62. The center of the gear structure is the rotation center of the drive arm 63. The drive arm 63 can be rotatably locked to the housing 10 at the corresponding rotation center position by means of screws or other structures. The other end of the drive arm 63 can be directly or indirectly connected to the first clamping arm 51 through an elastic element 65 to drive the first clamping arm 51 to slide relative to the housing 10. In a direct connection method, the elastic element 65 is a telescopic spring. One end of the telescopic spring is connected to the end of the drive arm 63, and the other end of the telescopic spring is connected to the first clamping arm 51. When the middle button 20 is pressed, the drive arm 63 is driven to rotate. At this time, the connection part between the drive arm 63 and the telescopic spring is closer to the extension end of the first clamping arm 51 relative to the housing 10 than the connection part between the telescopic spring and the first clamping arm 51. Thus, the elastic element 65 can provide the first clamping arm 51 with an elastic component force extending out of the housing 10. Conversely, when the back key 30 is pressed, the drive arm 63 is driven to rotate in the opposite direction. At this time, the connection between the drive arm 63 and the telescopic spring is away from the connection between the telescopic spring and the first clamping arm 51 and the extended end of the first clamping arm 51 relative to the housing 10. Thus, the elastic element 65 can provide the first clamping arm 51 with an elastic component force to retract into the housing 10.

[0040] In some embodiments, where the drive swing arm 63 is indirectly connected to the first clamping arm 51, the transmission assembly 60 includes a driven swing arm 64 rotatably connected to the housing 10. An elastic member 65 is connected between the drive swing arm 63 and the driven swing arm 64, and the driven swing arm 64 is rotatably connected to the first clamping arm 51. A rotating groove may be formed on the first clamping arm 51. One end of the driven swing arm 64 is rotatably connected to the housing 10, and the other end extends into and rotatably abuts against the rotating groove. When the elastic member 65 is a telescopic spring, one end of the telescopic spring is connected to the end of the drive swing arm 63, and the other end is connected between the two ends of the driven swing arm 64. The elastic member 65 is connected to the driven fixing portion of the driven swing arm 64, and the elastic member 65 is connected to the drive fixing portion of the drive swing arm 63. The distance from the rotation center of the drive swing arm 63 to the drive fixing portion is greater than the distance from the rotation center of the driven swing arm 64 to the driven fixing portion. In one embodiment, the rotation center of the driven swing arm 64 and the rotation center of the driving swing arm 63 are collinear, for example, by being stacked and rotatably fixed to the housing 10 using the same fastener; alternatively, their rotation centers may not be collinear, and they may be fixed to the housing 10 using different fasteners. It should be noted that the elastic element 65 can also be a torsion spring, a sheet spring, or other common structures that can provide elastic force.

[0041] refer to Figure 4 and Figure 5 On the other hand, in some embodiments, the first sliding assembly 40 includes a toothed condition 41 and a first reset member 42. The toothed condition 41 has a rack structure to mesh with the pinion 61. Simultaneously, the toothed condition 41 abuts against the back key 30. The first reset member 42 is connected between the toothed condition 41 and the housing 10 to drive the toothed condition 41 to slide along the first direction. The first reset member 42 can be, for example, a telescopic spring. The toothed condition 41 has a receiving groove to receive the telescopic spring. One end of the telescopic spring abuts against the housing 10, and the other end abuts against the groove wall. The back key 30 has a first conductive inclined surface 31, and the toothed condition 41 has a second conductive inclined surface 411. The first conductive inclined surface 31 and the second conductive inclined surface 411 are parallel and inclined to the sliding direction of the toothed condition 41 and the moving direction of the back key 30. The inclination angle can be, for example, 45°. The pressing direction of the back key 30 is perpendicular to the first direction.

[0042] The first sliding component 40 further includes a locking member 43, which moves synchronously with the toothed condition 41. The locking member 43 is rotatably connected to the toothed condition 41. After the back key 30 acts on the toothed condition 41 to move to a preset position in the opposite direction of the first direction, the locking member 43 can lock the back key 30. When the middle key 20 is pressed, it can act on the locking member 43 to disengage from the toothed condition 41. A right-angle hook can be provided on both the back key 30 and the locking member 43, and the two prevent the back key 30 from being pushed out by the toothed condition 41 by the abutting between the right-angle hooks. The locking member 43 acts as a lever structure on the toothed condition 41.

[0043] Specifically, the locking member 43 includes a latching part 431 and a pressing part 432 connected together. A second reset member 44 is connected between the latching part 431 and the toothed condition 41. The second reset member drives the latching part 431 to rotate toward the back key 30 to lock the back key 30. The pressing part 432 is located below the middle key 20. The middle key 20 can act on the pressing part 432 to drive the latching part 431 to rotate. As the latching part 431 separates from the back key 30, the toothed condition 41 will move along a first direction under the action of the first reset member 42, and then push the back key 30 away from the toothed condition 41 through the force transmission action of the inclined plane. The back key 30 will be pushed out of the housing 10. The latching part 431 and the pressing part 432 can be regarded as the two ends of a lever structure.

[0044] Furthermore, the pressing part 432 and the latching part 431 are connected by a rotating rod 433. The rotating rod 433 is rotatably connected to the toothed condition 41. The latching part 431 is located inside the toothed condition 41 and between the second reset member 44 and the back key 30. The pressing part 432 is located outside the toothed condition 41. A circular hole can be formed on the toothed condition 41, and the rotating rod 433 can be rotatably latched into the circular hole. The pressing part 432, the latching part 431, and the rotating rod 433 can be integrally connected. The second reset member 44 can also be a telescopic spring, torsion spring, or spring sheet structure.

[0045] In some embodiments, the center key 20 is provided with a slider 21, a third reset member 23, and a fourth reset member 24. The slider 21 is slidably connected to the center key 20 along the first direction. The third reset member 23 is connected between the slider 21 and the center key 20 to drive the slider 21 to move along the first direction. The pressing part 432 is located below the slider 21, and the slider 21 is used to act on the pressing part 432. The fourth reset member 24 is connected between the center key 20 and the housing 10, and is used to drive the center key 20 away from the housing 10. The slider 21 and the third reset member 23 move synchronously with the center key 20 along the thickness direction of the housing 10. A slide bar 22 may be provided on the center key 20, and the slider 21 and the third reset member 23 are sleeved on the slide bar 22. The third reset member 23 and the fourth reset member 24 may be spring sheets, extension springs, torsion springs, or other structures.

[0046] Under the action of the third reset member 23, the slider 21 is driven to be directly above the locking member 43, for example, directly above the pressing part 432. When the middle button 20 is pressed, the slider 21 presses against the locking member 43 to make it rotate, causing the locking member 43 to disengage from the back button 30. The first sliding component 40 can slide along the first direction to indirectly drive the first clamping member to clamp the electronic device. When the back button 30 is pressed, the first sliding component 40 is acted upon and slides in the opposite direction of the first direction to indirectly drive the first clamping member to unfold and release the electronic device. Subsequently, the first sliding component 40 latches the back button 30 to achieve a limit, for example, through the locking member 43. When the locking member 43 moves with the tooth condition 41, it will push the slider 21 on the middle button 20 in the opposite direction of the first direction. At this time, the middle button 20 is also away from the housing 10 under the action of the fourth reset member 24. The slider 21 moves upward and is located above the locking member 43. Under this operation, the first clamping member unfolds and the middle button 20 pops out, so that the user can remove the electronic device.

[0047] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electronic device bracket, characterized in that, The device includes a housing, a middle key, a back key, a first sliding assembly, a transmission assembly, and a first clamping arm. The transmission assembly includes a small gear, a large gear, a drive swing arm, and an elastic element that are rotatably connected to the housing. The middle key and the back key are movably connected to the housing and exposed on the outer surface of the housing. The first sliding assembly is slidably connected to the housing, and the first clamping arm is slidably connected to the housing. The middle key is driven to the first sliding component to move the first sliding component along the first direction, thereby driving the pinion. The back key is driven to the first sliding component to move the first sliding component in the opposite direction of the first direction. The first sliding component, the pinion, the large gear, and the driving swing arm are driven to each other in sequence. The tooth tip circle radius of the large gear is larger than that of the pinion. The driving swing arm is connected to the first clamping arm through the elastic element. The drive arm can change between a first angular position and a second angular position under the action of the large gear component, so that the elastic element pulls the first clamp closer to or away from the central key.

2. The electronic device bracket according to claim 1, characterized in that, The transmission assembly includes a driven swing arm rotatably connected to the housing, an elastic element connecting the driving swing arm and the driven swing arm, and the driven swing arm rotatably connected to the first clamping arm.

3. The electronic device bracket according to claim 2, characterized in that, The rotation center of the driven swing arm is collinear with the rotation center of the driving swing arm. The elastic element is a telescopic spring. The elastic element is connected to the driven fixed part of the driven swing arm and the driving fixed part of the driving swing arm. The distance from the rotation center of the driving swing arm to the driving fixed part is greater than the distance from the rotation center of the driven swing arm to the driven fixed part.

4. The electronic device bracket according to claim 1, characterized in that, The first sliding assembly includes a toothed condition and a first reset member. The toothed condition meshes with the pinion and abuts against the back key. The first reset member is connected between the toothed condition and the housing to drive the toothed condition to slide along the first direction.

5. The electronic device bracket according to claim 4, characterized in that, The first sliding component includes a locking member, which is rotatably connected to the toothed condition. After the back key acts on the toothed condition to move the toothed condition in the opposite direction of the first direction, the locking member can lock the back key. The middle key can act on the locking member to disengage the locking member from the toothed condition.

6. The electronic device bracket according to claim 5, characterized in that, The locking component includes a latching part and a pressing part connected together. A second reset member is connected between the latching part and the toothed condition. The second reset member drives the latching part to rotate toward the back key to lock the back key. The pressing part is located below the middle key. The middle key can act on the pressing part to drive the latching part to rotate.

7. The electronic device bracket according to claim 6, characterized in that, The pressing part and the latching part are connected by a rotating rod. The rotating rod is rotatably connected to the toothed condition. The latching part is located inside the toothed condition and between the second reset member and the back key. The pressing part is located outside the toothed condition.

8. The electronic device bracket according to claim 6, characterized in that, The middle key is provided with a slider, a third reset member and a fourth reset member. The slider is slidably connected to the middle key along the first direction. The third reset member is connected between the slider and the middle key to drive the slider to move along the first direction. The pressing part is located below the slider, and the slider is used to act on the pressing part. The fourth reset member is connected between the middle key and the housing, and the fourth reset member is used to drive the middle key away from the housing.

9. The electronic device bracket according to claim 4, characterized in that, The back key has a first conductive inclined surface, and the tooth condition has a second conductive inclined surface. The first conductive inclined surface and the second conductive inclined surface are parallel and are inclined to the sliding direction of the tooth condition and the moving direction of the back key.

10. The electronic device bracket according to claim 1, characterized in that, It also includes a second clamping arm and a transmission gear that are slidably connected to the housing. The first clamping arm and the second clamping arm are located on opposite sides of the housing. The sliding directions of the first clamping arm and the second clamping arm are parallel. Both the first clamping arm and the second clamping arm are provided with rack structures. The rack structures on the first clamping arm and the second clamping arm face each other and are meshed and connected by the transmission gear.

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