A board fixing mechanism and electronic device

Abstract

The application relates to the technical field of servers, and discloses a board card fixing mechanism and electronic equipment, which can make the board card firmly connected after being plugged with a connector, and improve the reliability of equipment operation. The board card fixing mechanism comprises a buckle assembly and a fixing support, wherein the buckle assembly comprises a mounting support and a lock tongue; the mounting support is provided with a mounting groove; the lock tongue is slidably arranged in the mounting groove along a first direction; the mounting support is fixedly arranged at the end of the board card; the fixing support is arranged on the bottom plate of a case; one end of the lock tongue towards the fixing support is provided with a protruding block; when the lock tongue slides to a first position, the protruding block extends out of the mounting groove and is locked with the fixing support; and the first direction is perpendicular to the plugging direction of the board card.

Description

Technical Field

[0001] This application relates to the field of server technology, and in particular to a board fixing mechanism and electronic device. Background Technology

[0002] The mounting bracket at the rear of the circuit board is usually an L-shaped bracket. One side of the L-shaped bracket is fixedly connected to the circuit board, and the other side is fixedly connected to the chassis. After the circuit board is inserted, screws are used to secure the L-shaped bracket to the chassis. However, the slot on the chassis side provides a reverse thrust to the circuit board. This reverse thrust can easily cause the circuit board to bounce back, resulting in poor contact between the circuit board's gold fingers and the connector on the chassis side, reducing the reliability and stability of the equipment operation. Utility Model Content

[0003] To address the aforementioned issues, the board fixing mechanism and electronic equipment provided in this application ensure a secure connection between the board and the connector, thereby improving the reliability of equipment operation.

[0004] In a first aspect, embodiments of this application provide a board fixing mechanism including a snap-fit ​​assembly and a fixing bracket. The snap-fit ​​assembly includes a mounting bracket and a locking tongue. The mounting bracket has a mounting groove, and the locking tongue is slidably mounted in the mounting groove along a first direction. The mounting bracket is fixedly mounted to the end of the board, and the fixing bracket is mounted on the chassis bottom plate. A protrusion is provided at one end of the locking tongue facing the fixing bracket. When the locking tongue slides to a first position, the protrusion extends out of the mounting groove and locks with the fixing bracket. The first direction is perpendicular to the insertion direction of the board.

[0005] In the above embodiment, the board can specifically be a GPU. The latching assembly is installed at one end of the board, which can be the tail end of the board, and the other end of the board can be the front end. The latching assembly and the board are fixed together to form a board module. The connector and the mounting bracket are both fixedly installed on the chassis bottom plate. When the latch is in the first position, it can engage with the mounting bracket to lock; when the latch is in the second position, it can unlock with the mounting bracket. During installation, the latch is first slid to the second position, in which the protrusion is located in the mounting groove. This prevents the protrusion from interfering with the mounting bracket and hindering the board insertion. Then, when the board is inserted to the preset position, the latch is slid to the first position to engage with the mounting bracket, thus locking the latching assembly with the mounting bracket. The latching assembly can be locked and unlocked by changing its position. This fixes the relative position of the board and the connector, thereby achieving stable insertion and improving the stability of device operation. Furthermore, the latch is concealed within the mounting slot, reducing the size of the latch assembly and making it look neat and aesthetically pleasing.

[0006] In one embodiment, the end of the latch away from the protrusion is provided with a latch handle, and the latch handle is located outside the mounting groove; the latch handle is bent toward the protrusion; the mounting bracket is provided with a fixed handle, the fixed handle is located on the side of the mounting groove, the fixed handle and the latch handle are arranged along the first direction, and the fixed handle is bent toward the side opposite to the latch handle. The latch handle and the fixed handle are bent in opposite directions, which facilitates the operator's disassembly and assembly of the board. Using a pinching gesture with the index finger and thumb, the latch handle is driven closer to the fixed handle, thereby sliding the latch to the second position, realizing the unlocking of the latch assembly and the mounting bracket. The bent latch handle and the fixed handle are ergonomic, making the operation comfortable and convenient. Furthermore, the bent latch handle and the fixed handle can provide a force point in the direction perpendicular to the chassis bottom plate, making it easier to remove the board from the slot.

[0007] In one embodiment, the latch assembly further includes a reset member disposed between the fixed handle and the latch handle. The reset member drives the latch to slide to the first position. The reset member enables the latch to automatically return, improving the convenience of board installation operations.

[0008] In one embodiment, the latch assembly further includes a latch cover plate and a reset member. The latch cover plate is disposed on the side of the latch facing away from the bottom of the mounting groove, and is fixedly connected to the latch block. The latch has a receiving cavity, a top wall, and a first side wall. The top wall has an oblong hole extending in the first direction. The latch block and the reset member are both located within the receiving cavity. A protrusion is disposed on the outer side of the first side wall, and the reset member is disposed between the latch block and the first side wall. The reset member drives the latch to slide to the first position. The reset member enables the latch to automatically rebound, improving the convenience of the plate installation operation.

[0009] In one embodiment, the latch is provided with a guide post, and the mounting bracket is provided with a guide hole. The axial direction of the guide post is the first direction, and the guide post is slidably disposed in the guide hole. During the sliding of the latch, the guide hole guides the latch, improving the stability of the latch sliding.

[0010] In one embodiment, the mounting bracket has a positioning post on the side opposite to the chassis bottom plate, the axis of the positioning post being the insertion direction of the board, and the mounting bracket having a positioning hole frame, with the positioning post passing through the positioning hole frame for positioning the board. The positioning post provides the first-level guide for the installation of the board module, reducing the possibility of misalignment between the board and the connector, and damage to the board or connector.

[0011] In one embodiment, the fixing bracket is provided with a limiting groove, the extending direction of which is the insertion direction of the circuit board. The mounting bracket is provided with a limiting baffle, and the limiting groove is used to guide the limiting baffle. The limiting groove guides the limiting baffle, thus providing a second guiding function for the installation of the circuit board module. After the circuit board is inserted into place, the limiting baffle and the limiting groove cooperate to limit the movement of the circuit board, making the insertion of the circuit board stable.

[0012] In one embodiment, the fixing bracket is provided with a snap-fit ​​plate and a positioning post mounting platform. The snap-fit ​​plate and the positioning post mounting platform are spaced apart by a preset distance along the insertion direction of the plate. The protrusion can be inserted between the snap-fit ​​plate and the positioning post mounting platform and snap-fit ​​with the snap-fit ​​plate to fix the plate in the vertical direction.

[0013] In one embodiment, the protrusion has a guide surface on the side facing the positioning post mounting platform, and the guide surface forms an angle with the insertion direction of the board. The guide surface eliminates the need for the operator to manually slide the locking tongue, making board installation more convenient.

[0014] Secondly, embodiments of this application also provide an electronic device, which includes a chassis, at least one circuit board, and at least one of the aforementioned circuit board fixing mechanisms. The number of circuit board fixing mechanisms is consistent with the number of circuit boards and they are installed accordingly. Under the fixing action of the circuit board fixing mechanisms, the relative positions of the circuit boards and connectors are fixed, thereby achieving stable insertion and improving the operational stability of the electronic device. Furthermore, the locking tongue is hidden within the mounting slot, reducing the size of the latching assembly and making its appearance neat and aesthetically pleasing, without interfering with the insertion and removal of adjacent circuit boards. Attached Figure Description

[0015] Figure 1 An assembly diagram of a board fixing mechanism and a board provided for one embodiment of this application; Figure 2 An assembly drawing of a snap-fit ​​assembly provided for one embodiment of this application; Figure 3 An exploded view of a snap-fit ​​assembly provided in one embodiment of this application; Figure 4 A partial cross-sectional view of a board fixing mechanism provided in one embodiment of this application; Figure 5 A cross-sectional view of a board fixing mechanism provided in one embodiment of this application; Figure 6 An exploded view of a board fixing mechanism provided in one embodiment of this application; Figure 7 An exploded view of the board fixing mechanism from another angle is provided for one embodiment of this application.

[0016] Figure label: 0 - Board; 1 - Mounting bracket; 2 - Fixing bracket; 3 - Locking tongue; X - First direction; Y - Second direction; Z - Board insertion direction; 101-Mounting slot; 1011-Allowing hole; 102-Fixing handle; 103-Guide hole; 104-Reset component; 105-Clamping block; 1051-First mounting hole; 106-Positioning hole bracket; 107-Limiting baffle; 110-Fixing hole bracket; 111-First fixing hole; 301-Protrusion; 3011-Guide surface; 302-Lock tongue handle; 303-Guide post; 304-Lock tongue cover plate; 3041-Second mounting hole; 305-Oval hole; 306-First sidewall; 201-Positioning post; 202-Limiting slide groove; 208-Snap-fit ​​plate; 209-Positioning post mounting platform; 210-Second fixing hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of the application is provided in conjunction with the accompanying drawings and embodiments.

[0018] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0019] References to “an embodiment” or “a specific embodiment” as used in this specification mean that one or more embodiments of this application include a particular feature, structure, or characteristic described in connection with that embodiment. The terms “comprising,” “including,” “having,” and variations thereof mean “including, but not limited to,” unless otherwise specifically emphasized.

[0020] With the rapid development of large-scale AI models, model parameters are increasing from hundreds of millions to trillions. GPU clusters have become the core of computing power. The demand for high throughput and low latency in data centers is accelerating GPU architecture innovation, while also posing challenges to GPU stability. Stable GPU installation is crucial. In related technologies, the GPU tail-end mounting bracket is often an L-shaped structure. An L-shaped structure has two perpendicular sides, one fixed to the GPU end and the other to the chassis. After the GPU's gold fingers are inserted into the connector, they are held in place only by friction and the weight of the GPU board before the screws are tightened. For some GPUs, this mating position can easily cause the GPU to bounce back, separating it from the connector and causing contact problems. Furthermore, some GPUs may not provide sufficient holding force to prevent bounce after insertion, potentially leading to unstable GPU mating and reduced server performance.

[0021] In view of this, embodiments of this application provide a board fixing mechanism and an electronic device, which ensures a secure connection of the board after it is plugged into the connector, thereby improving the reliability of the device operation.

[0022] Figure 1 This is an assembly diagram of a board fixing mechanism and a board provided in one embodiment of this application. Figure 2 An assembly drawing of a snap-fit ​​assembly provided in one embodiment of this application. Figure 3 An exploded view of a snap-fit ​​assembly provided in one embodiment of this application. Figures 1 to 3 As shown, an embodiment of this application provides a board fixing mechanism, which includes a snap-fit ​​assembly and a fixing bracket 2. The snap-fit ​​assembly includes a mounting bracket 1 and a locking tongue 3. The mounting bracket 1 has a mounting groove 101, and the locking tongue 3 is slidably mounted in the mounting groove 101 along a first direction X. A clearance hole 1011 is provided on the side wall of the mounting groove 101 facing the fixing bracket 2. This clearance hole 1011 allows a protrusion 301 to pass through. The first direction X is the extension direction of the board 0. The mounting bracket 1 is fixedly mounted on the end of the board 0, and the fixing bracket 2 is mounted on the chassis bottom plate (not shown in the figure). The locking tongue 3 has a protrusion 301 at one end facing the fixing bracket 2. When the locking tongue 3 slides to a first position, the protrusion 301 can extend out of the mounting groove 101 and lock with the fixing bracket 2. The first direction X is perpendicular to the board's insertion direction Z.

[0023] In the above embodiment, board 0 can specifically be a GPU. The latching assembly is installed at one end of board 0, which can be the tail end of board 0, and the other end of board 0 can be the front end. The latching assembly is fixed together with board 0 to form a board module. The connector (not shown in the figure) and the mounting bracket 2 are both fixedly installed on the chassis bottom plate. When the locking tongue 3 is in the first position, it can engage with the mounting bracket 2 to lock it. When the locking tongue 3 is in the second position, it can unlock with the mounting bracket 2. During installation, the locking tongue 3 is first slid to the second position. In the second position, the protrusion 301 is located in the mounting groove 101, so that when board 0 is inserted, the protrusion 301 will not interfere with the mounting bracket 2 and hinder the insertion of board 0. Then, when board 0 is inserted to the preset position, the locking tongue 3 is slid to the first position to engage with the mounting bracket 2, realizing the locking of the latching assembly and the mounting bracket 2. The locking tongue 3 can lock and unlock the latching assembly and the mounting bracket 2 by changing its position. This design fixes the relative position of the board 0 and the connector, ensuring stable insertion and improving the stability of equipment operation. Furthermore, the locking tongue 3 is concealed within the mounting slot 101, reducing the size of the latching assembly and giving it a neat and aesthetically pleasing appearance.

[0024] In one embodiment, the end of the latch 3 furthest from the protrusion 301 is provided with a latch handle 302. The latch handle 302 is located outside the mounting groove 101 and bends towards the protrusion 301, i.e., towards the tail end of the plate 0. The mounting bracket 1 is provided with a fixed handle 102, located on the side of the mounting groove 101. The fixed handle 102 and the latch handle 302 are arranged along a first direction X. The fixed handle 102 bends away from the latch handle 302, i.e., towards the front end of the plate 0. In other words, the latch handle 302 and the fixed handle 102 bend in opposite directions. The latch handle 302 and the fixed handle 102 each form a receiving space in their bent portions, facilitating the operator to insert their fingers. During the disassembly and assembly of the plate 0, the operator can use a pinching gesture with their index finger and thumb to drive the latch handle 302 closer to the fixed handle 102, thereby sliding the latch 3 to the second position and unlocking the latch assembly from the fixed bracket 2. The curved latch handle 302 and the fixed handle 102 are ergonomically designed for comfortable and convenient operation. Furthermore, the fixed handle 102 and the latch handle 302 are located on top of the board 0, facilitating its installation and removal. The board's insertion direction Z is perpendicular to the first direction X. When disassembling the board module, the curved latch handle 302 and the fixed handle 102 provide a force point perpendicular to the chassis bottom plate, making the lifting action easier for the operator and thus reducing the effort required to pull the board 0 out of the slot. When multiple closely arranged boards are installed inside the chassis, the latch handle 302 and the fixed handle 102 facilitate the disassembly of individual boards without interfering with adjacent boards.

[0025] In one embodiment, the latch 3 is provided with a guide post 303. The mounting bracket 1 is provided with a guide hole 103. Specifically, the guide post 303 is located at the end of the latch 3 away from the protrusion 301, that is, the guide post 303 extends towards the front end of the plate 0. The guide hole 103 is located on the side wall of the mounting groove 101 near the front end. The axial direction of the guide post 303 is a first direction X, and the guide post 303 can slide in the guide hole 103. During the sliding of the latch 3, the guide hole 103 guides the latch 3, improving the stability of the latch 3 sliding.

[0026] Figure 4 A partial cross-sectional view of a board fixing mechanism provided in one embodiment of this application, as shown below. Figure 4 As shown, in another embodiment, the guide post 303 can also be disposed on the side of the latch 3 handle opposite to the protrusion 301. The guide hole 103 is located on the fixed handle 102.

[0027] In one embodiment, the latch assembly further includes a reset member 104, which is disposed between the mounting bracket 1 and the latch 3. The reset member 104 is used to drive the latch 3 to slide to a first position. Specifically, the reset member 104 can be a spring, which can be disposed between the latch handle 302 and the fixed handle 102. During unlocking, the latch 3 is in a second position, and the latch handle 302 is close to the fixed handle 102, causing the spring to be compressed. When the latch handle 302 is released, the spring unfolds and drives the latch 3 to slide to the second position. The reset member enables the latch to automatically return, improving the convenience of board installation operations.

[0028] Figure 5 A cross-sectional view of a board fixing mechanism provided in one embodiment of this application, in conjunction with... Figures 3 to 5In another embodiment, the latch assembly further includes a latch cover plate 304. A latching block 105 is provided at the bottom of the mounting groove 101. A first mounting hole 1051 with internal threads is provided on the side of the latching block 105 facing away from the bottom of the mounting groove. A waist-shaped hole 305 is provided on the top wall of the latch 3, extending in a first direction X. A second mounting hole 3041 is provided on the latch cover plate 304. The latch cover plate 304 is located on the side of the latch 3 facing away from the bottom of the mounting groove 101. A screw passes sequentially through the second mounting hole 3041 of the latch cover plate 304 and the waist-shaped hole 305 of the latch 3, and is tightened with the internal threads of the first mounting hole 1051 of the latching block 105. The head of the screw engages with the second mounting hole 3041 of the latch cover plate 304, completing the assembly of the latch cover plate 304, the latch 3, and the mounting bracket 1. The screw fixes the latch cover plate 304 to the latching block 105. The oblong hole 305 of the latch 3 provides sliding space, allowing the latch 3 to slide relative to the latch cover 304 and the locking block 105. The latch 3 has a receiving cavity, and the latch 3 can be fitted onto the outside of the locking block 105. The latch 3 has a first sidewall 306, and a protrusion 301 is disposed on the outside of the first sidewall 306. A reset member 104 is disposed between the locking block 105 and the first sidewall 306. The reset member 104 is used to drive the latch 3 to slide to a first position. The reset member 104 can be a spring. The locking block 105 and the reset member 104 are both located within the receiving cavity of the latch 3.

[0029] Figure 6 An exploded view of a board fixing mechanism provided in one embodiment of this application, continuing to refer to... Figure 5 and Figure 6 In one embodiment, the fixing bracket 2 has a positioning post 201 on the side facing away from the chassis bottom plate. The axial direction of the positioning post 201 is the insertion direction Z of the board, that is, perpendicular to the chassis bottom plate. The mounting bracket 1 has a positioning hole frame 106, which is located outside the mounting groove 101 and on the side of the mounting groove 101 facing the fixing bracket 2. The positioning hole frame 106 and the protrusion 301 are arranged along the second direction Y, and the first direction X, the second direction Y and the insertion direction Z of the board are perpendicular to each other. The positioning post 201 passes through the positioning hole frame 106 to position the board 0. During installation, the board module is inserted downward into the connector, and at the same time, the positioning hole frame 106 is fitted around the outer periphery of the positioning post 201. The positioning post 201 can play a first guiding role in the installation of the board module, reducing the possibility of misalignment between the board 0 and the connector, and damage to the board 0 or the connector.

[0030] Figure 7 An exploded view of the board fixing mechanism from another angle is provided for one embodiment of this application, with reference to... Figure 6 and Figure 7In one embodiment, the fixed bracket 2 is further provided with a limiting groove 202, which is located on the side of the positioning post 201. The extending direction of the limiting groove 202 is the insertion direction Z of the board. The mounting bracket 1 is further provided with a limiting baffle 107. When the board 0 is installed, the limiting baffle 107 slides along the limiting groove 202, which guides the limiting baffle 107. Specifically, the mounting bracket 1 is L-shaped, including a first part and a second part that are perpendicular to each other. The extending direction of the first part is the first direction X, and the extending direction of the second part is the insertion direction Z of the board. The board 0 is approximately a cuboid structure. The mounting bracket is installed at the top corner of the tail end of the board 0. The first part is installed on the top of the board 0, and the second part is installed on the side of the board 0 facing the fixed bracket 2. The board 0 and the second part are stacked along the first direction X. The mounting groove 101 is located in the first part, and the limiting baffle 107 is located in the second part. When installing board 0, the board module is inserted downwards into the connector. The limiting baffle 107 slides along the limiting groove 202, which guides the limiting baffle 107, thus providing a second guiding function for the installation of the board module. After board 0 is inserted into place, the limiting baffle 107 and the limiting groove 202 cooperate to restrict the movement of board 0 in the second direction Y, ensuring stable insertion of board 0.

[0031] The fixed handle and locking tongue handle are located on the top of the board, facilitating the installation and removal of the board.

[0032] Continue to refer to Figure 6 In one embodiment, the fixing bracket 2 further includes a snap-fit ​​plate 208 and a positioning post mounting platform 209. Specifically, the fixing bracket 2 includes a bracket body, and the surface of the bracket body facing away from the chassis bottom plate is the positioning post mounting platform 209, on which the positioning post 201 is mounted. The snap-fit ​​plate 208 and the positioning post mounting platform 209 are spaced apart by a preset distance along the insertion direction Z of the plate, and the protrusion 301 can be inserted between the snap-fit ​​plate 208 and the positioning post mounting platform 209 and abut against the snap-fit ​​plate 208 to achieve snap-fit.

[0033] like Figure 4 As shown, to facilitate the installation of the board module, in one embodiment, the protrusion 301 has a guide surface 3011 on the side facing the positioning post mounting platform 209, and this guide surface 3011 forms an angle with the board's insertion direction Z. When the protrusion 301 contacts the latching plate 208, the latching plate 208 can slide along the guide surface 3011, allowing the protrusion 301 to slide along the first direction X, thereby causing the latch 3 to slide to the second position. The guide surface 3011 eliminates the need for the operator to manually slide the latch 3, making the installation of the board 0 more convenient.

[0034] To ensure a more stable connection between the board 0 and the connector, in one embodiment, the mounting bracket 1 further includes a fixing hole bracket 110, which is located on top of the limiting baffle 107 and has a first fixing hole 111. The fixing bracket 2 has a second fixing hole 210. When the board module is inserted into place, the first fixing hole 111 and the second fixing hole 210 are opposite each other along the board insertion direction Z. By passing screws through the first fixing hole 111 and the second fixing hole 210, the mounting bracket 1 and the fixing bracket 2 can be fixed together.

[0035] Embodiments of this application also provide an electronic device, which can be a server, including a chassis, a connector, at least one board 0, and at least one board fixing mechanism as described in any of the above embodiments. The number of board fixing mechanisms is the same as the number of boards 0 and they are installed accordingly. The fixing bracket 2 and the connector of the board fixing mechanism are both mounted on the bottom plate of the chassis. In one embodiment, the electronic device includes multiple circuit boards 0 and multiple circuit board fixing mechanisms, with the multiple circuit boards 0 arranged along a second direction Y. The fixing brackets 2 of the multiple circuit board fixing mechanisms are arranged along the second direction Y and mounted on the bottom plate of the chassis. Under the fixing action of the circuit board fixing mechanisms, the relative positions of the circuit boards and connectors are fixed, thereby achieving stable insertion and improving the operational stability of the electronic device. Furthermore, the locking tongue is hidden within the mounting slot, reducing the size of the latching assembly and making its appearance neat and aesthetically pleasing. The fixing handle and locking tongue handle are located on the top of the circuit board, allowing for easy operation by placing fingers at the top of the board when disassembling any circuit board, without obstruction from adjacent boards, and without interference to adjacent boards.

[0036] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "top", "bottom", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0037] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A plate fixing mechanism, characterized in that, Includes snap-fit ​​components and mounting brackets, among which, The latch assembly includes a mounting bracket and a locking tongue. The mounting bracket has a mounting groove, and the locking tongue is slidably mounted in the mounting groove along a first direction. The mounting bracket is fixedly mounted to the end of the board, and the fixed bracket is mounted on the chassis bottom plate. The end of the locking tongue facing the fixed bracket has a protrusion. When the locking tongue slides to the first position, the protrusion extends out of the mounting groove and locks with the fixed bracket. The first direction is perpendicular to the insertion direction of the board.

2. The plate fixing mechanism according to claim 1, characterized in that, The latch is provided with a latch handle at the end away from the protrusion, and the latch handle is located outside the mounting groove; the latch handle is bent toward the protrusion; the mounting bracket is provided with a fixed handle, the fixed handle is located on the side of the mounting groove, the fixed handle and the latch handle are arranged along the first direction, and the fixed handle is bent toward the side away from the latch handle.

3. The plate fixing mechanism according to claim 2, characterized in that, The buckle assembly also includes a reset member, which is disposed between the fixed handle and the latch handle, and is used to drive the latch to slide to the first position.

4. The plate fixing mechanism according to claim 1, characterized in that, The latch assembly also includes a latch cover plate and a reset component. The latch cover plate is disposed on the side of the latch away from the bottom of the mounting groove. The bottom of the mounting groove is provided with a locking block, and the latch cover plate is fixedly connected to the locking block. The latch has a receiving cavity, a top wall and a first side wall. The top wall has an oblong hole, and the extension direction of the oblong hole is the first direction. The locking block and the reset member are both located in the receiving cavity. The protrusion is disposed on the outside of the first side wall. The reset member is disposed between the locking block and the first side wall. The reset member is used to drive the latch to slide to the first position.

5. The plate fixing mechanism according to claim 1, characterized in that, The locking tongue is provided with a guide post, and the mounting bracket is provided with a guide hole. The axial direction of the guide post is the first direction, and the guide post is slidably disposed in the guide hole.

6. The plate fixing mechanism according to claim 1, characterized in that, The fixed bracket has a positioning post on the side away from the bottom plate of the chassis. The axial direction of the positioning post is the insertion direction of the board. The mounting bracket has a positioning hole frame, and the positioning post passes through the positioning hole frame to position the board.

7. The plate fixing mechanism according to claim 1, characterized in that, The fixed bracket is provided with a limiting groove, the extension direction of the limiting groove is the insertion direction of the board, the mounting bracket is provided with a limiting baffle, and the limiting groove is used to guide the limiting baffle.

8. The plate fixing mechanism according to claim 1, characterized in that, The fixed bracket is provided with a snap-fit ​​plate and a positioning post mounting platform. The snap-fit ​​plate and the positioning post mounting platform are spaced apart by a preset distance along the insertion direction of the plate. The protrusion can be inserted between the snap-fit ​​plate and the positioning post mounting platform and snap-fit ​​with the snap-fit ​​plate.

9. The plate fixing mechanism according to claim 8, characterized in that, The protrusion has a guide surface on the side facing the positioning post mounting platform, and the guide surface has an angle with the insertion direction of the board.

10. An electronic device, characterized in that, It includes a chassis, at least one circuit board, and at least one circuit board fixing mechanism as described in any one of claims 1 to 9, wherein the number of circuit board fixing mechanisms is the same as the number of circuit boards and they are installed accordingly.

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