Multi-layer circuit board fast board structure and method capable of preventing circuit boards from moving and colliding

Abstract

The invention relates to the related technical field of circuit boards, in particular to a multilayer circuit board fast board structure and method capable of preventing circuit boards from moving and colliding, the multilayer circuit board fast board structure comprises two mounting frames and a circuit board module, and two stretching assemblies are fixedly connected to the positions, corresponding to four clamping grooves, of the opposite surfaces of the two mounting frames. Limiting assemblies are in lap joint with the sides, away from the mounting frames, of the stretching assemblies, and three buffering assemblies are fixedly connected to the opposite faces of the two mounting frames. According to the multilayer circuit board fast board structure and method capable of preventing the circuit boards from moving and colliding, through the arrangement of the limiting assembly and the buffer assembly, it can be ensured that the circuit board module is not prone to moving in the using process, and the circuit board module is not prone to moving; the two L-shaped limiting blocks can ensure the relative position between the circuit board module and the mounting rack through the limiting grooves in the two strip-shaped insertion blocks, the stability is higher, the buffer assembly can ensure that the circuit board body does not collide with the circuit board body on the lower layer when the circuit board body is bent, and the protection effect on the circuit board body is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to circuit boards, and in particular to a multi-layer circuit board quick plate structure and method capable of preventing the circuit board from moving and colliding. Background Art

[0002] PCB quick board proofing refers to the manufacture of a small number of samples for testing and evaluation in the early stage of product design in order to verify the feasibility and accuracy of the design plan. It is also a service model that is generated to meet the customer's needs for obtaining circuit board samples in a short period of time. Therefore, it is more common in the circuit board field.

[0003] In the design process of the current circuit board allegro structure, in order to improve manufacturing efficiency, the multi-layer board is designed as a plug-in structure in the multi-layer board structure, that is, multiple circuit boards are assembled using an assembly structure, and they are inserted into the assembly structure in the form of plug-in to complete the manufacturing. However, in the actual use process of the multi-layer circuit board allegro with this structure, the assembly structure has a poor positioning effect on the circuit board. Once a large vibration occurs, the circuit board may move and detach. At the same time, the circuit board itself may bend and may collide with other circuit boards on the upper and lower layers, thereby causing damage to electronic components and causing the device to be unable to be used normally. There is still room for improvement. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-layer circuit board fastener structure and method that can prevent circuit boards from moving and colliding, so as to solve the problem that the existing multi-layer circuit boards mentioned in the above background technology have poor positioning effect and cannot prevent multi-layer circuit boards from colliding.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-layer circuit board fastener structure and method capable of preventing a circuit board from moving and colliding, comprising two mounting frames and a circuit board module, four card slots are provided at the same position on the opposite faces of the two mounting frames, two stretching components are fixedly connected to the positions corresponding to the four card slots on the opposite back faces of the two mounting frames, a limiting component is overlapped on the side of the stretching component away from the mounting frame, three buffer components are fixedly connected to the opposite faces of the two mounting frames, the circuit board module comprises a circuit board body and two strip plug-in blocks, slots are provided on the opposite back faces of the two strip plug-in blocks, limiting slots are provided on the front and rear inner walls of the slots, strip slots are provided on the opposite faces of the two strip plug-in blocks, flexible connectors are fixedly connected to the inner walls of the strip slots, and the left and right sides of the circuit board body are respectively fixedly connected to the two flexible connectors;

[0006] The stretching assembly comprises a positioning frame, the inner wall of the positioning frame is slidably connected with a movable plate, a side of the movable plate away from the mounting frame is fixedly connected with a connecting rod, and a surface of the connecting rod is sleeved with an extrusion spring;

[0007] The limiting assembly includes a bar frame, and the back surfaces of the two mounting frames are provided with bar through holes at positions corresponding to the bar frames. The front surface of the bar frame is rotatably connected with positive and negative screw rods, and the inner wall of the bar frame is slidably connected with two movable blocks. A sliding groove is provided on one side of the bar frame close to the mounting frame, and the inner wall of the sliding groove is slidably connected with two L-shaped limiting blocks.

[0008] Preferably, the strip-shaped plug block is matched with the card slot, and the flexible connector is made of silicone.

[0009] Preferably, a circular hole matching the connecting rod is formed on a side of the positioning frame away from the mounting frame, and an end of the connecting rod away from the movable plate passes through the circular hole and is fixedly connected to the strip frame.

[0010] Preferably, one end of the extrusion spring is fixedly connected to the inner wall of the positioning frame, and the other end is fixedly connected to the movable plate.

[0011] Preferably, the rear end of the forward and reverse threaded rod is rotatably connected to the inner rear wall of the bar frame, and the two movable blocks are respectively threadedly connected to the forward and reverse threads on the surface of the forward and reverse threaded rod.

[0012] Preferably, the two movable blocks are fixedly connected to two L-shaped limit blocks on one side close to the mounting frame, and the two L-shaped limit blocks are respectively matched with the bar-shaped through hole, the slot and the limit groove.

[0013] Preferably, the buffer assembly includes a positioning plate, the upper surface of the positioning plate is provided with a S-shaped groove, the inner wall of the S-shaped groove is fixedly connected with a round rod, the surface of the round rod is sleeved with two buffer springs, the inner bottom wall of the S-shaped groove is slidably connected with two moving blocks, and the lower surface of the positioning plate is fixedly connected with a silicone pad.

[0014] Preferably, the two moving blocks are slidably connected to the surface of the round rod, and the opposite ends of the two buffer springs are fixedly connected to the opposite back surfaces of the two moving blocks, and the opposite ends of the two buffer springs are fixedly connected to the left and right inner walls of the slot.

[0015] Preferably, the upper surfaces of the two moving blocks are fixedly connected to the first rotating frames, and the inner walls of the two first rotating frames are rotatably connected to the transmission rods.

[0016] A method for using a multilayer circuit board quick board structure capable of preventing a circuit board from moving and colliding, further comprising the following steps:

[0017] Step 1: Pull the bar frame to both sides so that the bar frame drives the movable plate to move in the positioning frame through the connecting rod. During this process, the spring is squeezed to deform until the two L-shaped limit blocks are separated from the slot, making room for the installation of the circuit board module.

[0018] Step 2: Insert multiple circuit board modules into the slots of the mounting frame through two strip-shaped inserts. At this time, release the strip frame, and the extrusion spring uses its own reaction force to drive the strip frame back to its original position, so that the two L-shaped limit blocks are inserted into the slots of the strip-shaped inserts.

[0019] Step 3: Rotate the positive and negative screws on the front of the bar frame corresponding to the slot position. Due to the threaded connection between the positive and negative screws and the two movable blocks, the positive and negative screws rotate to drive the two movable blocks to move to the opposite back sides, and then drive the two L-shaped limit blocks to insert into the limit grooves on the inner wall of the slot, so as to achieve accurate positioning of the circuit board module and ensure that the circuit board module will not be displaced during subsequent use;

[0020] Step 4: After the circuit board body is installed, its bottom is in contact with the buffer plate. When vibration occurs, the circuit board body is deformed downward and drives the buffer plate to move downward. The buffer plate drives the two moving blocks to move toward the opposite sides on the surface of the round rod through the two second rotating frames and the transmission rod. The moving blocks squeeze the buffer spring. The deformation of the buffer spring weakens the bending of the circuit board body to avoid collision between the two layers of the circuit board body. At the same time, if the circuit board body is bent upward, it will be buffered by the silicone pad, which can also avoid collision between the two layers of the circuit board body, thereby providing good protection for the circuit board body.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the multi-layer circuit board fastener structure and method capable of preventing the circuit board from moving and colliding can ensure that the circuit board module will not move easily when in use through the arrangement of the limit assembly and the buffer assembly, and the two L-shaped limit blocks can ensure the relative position between the circuit board module and the mounting frame through the limit grooves in the two strip-shaped plug-in blocks, and after the L-shaped limit blocks are inserted into the limit grooves, the stretching assembly is restricted and will not be displaced, and the stability is higher, and the buffer assembly can ensure that the circuit board body will not collide with the circuit board body of the lower layer when bending, and the reaction force generated by the buffer spring and the elastic effect of the silicone pad itself can also offset part of the vibration effect on the circuit board body, thereby further improving the protection effect on the circuit board body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the circuit board module of the present invention;

[0024] Figure 3 This is a schematic diagram of the three-dimensional split structure of the stretching assembly of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional split structure of the limit assembly of the present invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the buffer assembly of the present invention;

[0027] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0028] In the figure: 1. mounting frame; 2. circuit board module; 3. stretching assembly; 4. limiting assembly; 5. buffer assembly; 201. circuit board body; 202. strip plug; 203. flexible connector; 301. positioning frame; 302. movable plate; 303. connecting rod; 304. extrusion spring; 401. strip frame; 402. positive and negative threaded rod; 403. movable block; 404. L-shaped limiting block; 501. positioning plate; 502. round rod; 503. buffer spring; 504. moving block; 505. silicone pad; 506. first rotating frame; 507. transmission rod; 508. second rotating frame; 509. buffer plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-6 The present invention provides a technical solution: a multi-layer circuit board fastener structure and method for preventing circuit boards from moving and colliding, comprising two mounting frames 1 and a circuit board module 2, four card slots are provided at the same position on the opposite faces of the two mounting frames 1, two stretching components 3 are fixedly connected to the positions corresponding to the four card slots on the opposite back faces of the two mounting frames 1, a limiting component 4 is overlapped on the side of the stretching component 3 away from the mounting frame 1, and three buffer components 5 are fixedly connected to the opposite faces of the two mounting frames 1, characterized in that: the circuit board module 2 comprises a circuit board body 201 and two strip plug-in blocks 202, slots are provided on the opposite back faces of the two strip plug-in blocks 202, limiting slots are provided on the front and rear inner walls of the slots, strip slots are provided on the opposite faces of the two strip plug-in blocks 202, flexible connectors 203 are fixedly connected to the inner walls of the strip slots, and the left and right sides of the circuit board body 201 are respectively fixedly connected to the two flexible connectors 203;

[0032] The stretching assembly 3 includes a positioning frame 301, the inner wall of the positioning frame 301 is slidably connected with a movable plate 302, the side of the movable plate 302 away from the mounting frame 1 is fixedly connected with a connecting rod 303, and the surface of the connecting rod 303 is sleeved with an extrusion spring 304;

[0033] The limiting assembly 4 includes a bar frame 401, and bar through holes are provided at positions corresponding to the bar frames 401 on the opposite back sides of the two mounting frames 1. The front side of the bar frame 401 is rotatably connected with positive and negative screw rods 402, and the inner wall of the bar frame 401 is slidably connected with two movable blocks 403. A sliding groove is provided on one side of the bar frame 401 close to the mounting frame 1, and the inner wall of the sliding groove is slidably connected with two L-shaped limiting blocks 404.

[0034] Furthermore, the strip-shaped plug block 202 is matched with the card slot, and the material of the flexible connector 203 is silicone. The flexible connector 203 made of silicone will not damage the circuit board body 201 and can also improve the protection effect of the circuit board body 201.

[0035] Furthermore, a circular hole matching the connecting rod 303 is provided on the side of the positioning frame 301 away from the mounting frame 1, and the end of the connecting rod 303 away from the movable plate 302 passes through the circular hole and is fixedly connected to the bar frame 401. Pulling the bar frame 401 can drive the movable plate 302 to move in the positioning frame 301 through the connecting rod 303.

[0036] Furthermore, one end of the extrusion spring 304 is fixedly connected to the inner wall of the positioning frame 301, and the other end is fixedly connected to the movable plate 302. When the movable plate 302 moves, the extrusion spring 304 can be deformed, and when the extrusion spring 304 loses its restriction, it can drive the movable plate 302 back to its original position through the reaction force.

[0037] Furthermore, the rear end of the forward and reverse screw rod 402 is rotatably connected to the inner rear wall of the bar frame 401, and the two movable blocks 403 are respectively threadedly connected to the forward and reverse threads on the surface of the forward and reverse screw rod 402. After the forward and reverse screw rod 402 rotates, it can drive the two movable blocks 403 to move to the opposite side or the back side respectively.

[0038] Furthermore, the two movable blocks 403 are fixedly connected to two L-shaped limit blocks 404 on one side close to the mounting frame 1, and the two L-shaped limit blocks 404 are respectively adapted to the bar-shaped through hole, the slot and the limit groove. The L-shaped limit block 404 can pass through the bar-shaped through hole and be inserted into the slot, and at the same time be inserted into the two limit grooves in the slot, so as to position the entire circuit board module 2 to ensure that it will not move.

[0039] Furthermore, the buffer assembly 5 includes a positioning plate 501, the upper surface of the positioning plate 501 is provided with a straight groove, the inner wall of the straight groove is fixedly connected with a round rod 502, the surface of the round rod 502 is sleeved with two buffer springs 503, the inner bottom wall of the straight groove is slidably connected with two moving blocks 504, and the lower surface of the positioning plate 501 is fixedly connected with a silicone pad 505, and the silicone pad 505 can ensure that when the lower circuit board body 201 is bent upward, a protective buffering effect is produced on the lower circuit board body 201.

[0040] Furthermore, the two moving blocks 504 are slidably connected to the surface of the round rod 502, and the opposite ends of the two buffer springs 503 are fixedly connected to the opposite back surfaces of the two moving blocks 504, and the opposite ends of the two buffer springs 503 are fixedly connected to the left and right inner walls of the slot.

[0041] Furthermore, the upper surfaces of the two moving blocks 504 are fixedly connected to the first rotating frames 506 , and the inner walls of the two first rotating frames 506 are rotatably connected to the transmission rods 507 .

[0042] Example 2

[0043] A method for using a multi-layer circuit board allegro structure capable of preventing a circuit board from moving and colliding is provided, which adopts the multi-layer circuit board allegro structure capable of preventing a circuit board from moving and colliding in Embodiment 1, and further comprises the following steps:

[0044] Step 1: Pull the bar frame 401 to both sides, so that the bar frame 401 drives the movable plate 302 to move in the positioning frame 301 through the connecting rod 303. In this process, the spring 304 is squeezed to deform until the two L-shaped limit blocks 404 are separated from the card slot, making room for the installation of the circuit board module 2;

[0045] Step 2: insert multiple circuit board modules 2 into the slots of the mounting frame 1 through the two strip-shaped insert blocks 202, then release the strip frame 401, and the extrusion spring 304 drives the strip frame 401 back to the original position by its own reaction force, so that the two L-shaped limit blocks 404 are inserted into the slots of the strip-shaped insert blocks 202;

[0046] Step 3: Rotate the positive and negative screw rods 402 on the front side of the bar frame 401 corresponding to the slot position. Due to the threaded connection between the positive and negative screw rods 402 and the two movable blocks 403, the positive and negative screw rods 402 rotate to drive the two movable blocks 403 to move to the opposite sides, thereby driving the two L-shaped limit blocks 404 to insert into the limit grooves on the inner wall of the slot, thereby achieving accurate positioning of the circuit board module 2 and ensuring that the circuit board module 2 will not be displaced during subsequent use;

[0047] Step 4: After the circuit board body 201 is installed, its lower part contacts the buffer plate 509. When vibration occurs, the circuit board body 201 is deformed downward and drives the buffer plate 509 to move downward. The buffer plate 509 drives the two moving blocks 504 to move toward opposite sides on the surface of the round rod 502 through the two second rotating frames 508 and the transmission rod 507. The moving blocks 504 squeeze the buffer spring 503. The deformation of the buffer spring 503 weakens the bending of the circuit board body 201 to avoid collision between the two layers of the circuit board body 201. At the same time, if the circuit board body 201 bends upward, it will be buffered by the silicone pad 505, which can also avoid collision between the two layers of the circuit board body 201, thereby having a good protective effect on the circuit board body 201.

[0048] Working principle: first, pull the bar frame 401 to both sides, so that the bar frame 401 drives the movable plate 302 to move in the positioning frame 301 through the connecting rod 303 and deforms the squeezing spring 304, so that the two L-shaped limit blocks 404 are disengaged from the slots, and multiple circuit board modules 2 are respectively inserted into the slots through the two bar plug-in blocks 202. At this time, release the bar frame 401, and the squeezing spring 304 drives the bar frame 401 to return to the original position through the reaction force. At this time, the two L-shaped limit blocks 404 are inserted into the slots, and the positive and negative screw rods 402 on the front side of the bar frame 401 corresponding to the slot position are rotated. After the positive and negative screw rods 402 are rotated, they can drive the two movable blocks 403 to move to the opposite back sides, thereby driving the two L-shaped limit blocks 404 to be inserted into the limit grooves on the inner wall of the slot, thereby completing the positioning of the circuit board module 2 and ensuring that the circuit board module 2 is used. No movement will occur during use, and at the same time, the bottom of the circuit board body 201 is in contact with the buffer plate 509. When vibration occurs, the circuit board body 201 is deformed downward and drives the buffer plate 509 to move downward. The buffer plate 509 can drive the two moving blocks 504 to move toward opposite sides on the surface of the round rod 502 through the two second rotating frames 508 and the transmission rod 507. At this time, the moving blocks 504 can squeeze the buffer spring 503, thereby weakening the bending of the circuit board body 201 and avoiding collision between the two layers of the circuit board body 201. At the same time, it can also reduce the impact of vibration on the circuit board body 201. The circuit board body 201 that is bent upward can be buffered by the silicone pad 505, which can also avoid collision between the two layers of the circuit board body 201, and the protection effect on the circuit board body 201 is better.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer circuit board fastener structure capable of preventing a circuit board from moving and colliding, comprising two mounting frames (1) and a circuit board module (2), four card slots being provided at the same position on the opposite sides of the two mounting frames (1), two stretching components (3) being fixedly connected at the positions corresponding to the four card slots on the opposite back sides of the two mounting frames (1), a limiting component (4) being overlapped on the side of the stretching component (3) away from the mounting frame (1), and three buffer components (5) being fixedly connected to the opposite sides of the two mounting frames (1), characterized in that: The circuit board module (2) comprises a circuit board body (201) and two strip-shaped plug-ins (202); slots are provided on opposite sides of the two strip-shaped plug-ins (202); limiting slots are provided on front and rear inner walls of the slots; strip grooves are provided on opposite sides of the two strip-shaped plug-ins (202); flexible connectors (203) are fixedly connected to the inner walls of the strip grooves; and the left and right sides of the circuit board body (201) are respectively fixedly connected to the two flexible connectors (203); The stretching assembly (3) comprises a positioning frame (301), the inner wall of the positioning frame (301) is slidably connected to a movable plate (302), a side of the movable plate (302) away from the mounting frame (1) is fixedly connected to a connecting rod (303), and a surface of the connecting rod (303) is sleeved with a compression spring (304); The limiting assembly (4) comprises a bar frame (401), the back surfaces of the two mounting frames (1) are provided with bar through holes at positions corresponding to the bar frame (401), the front surface of the bar frame (401) is rotatably connected with a positive and negative threaded rod (402), the inner wall of the bar frame (401) is slidably connected with two movable blocks (403), a sliding groove is provided on one side of the bar frame (401) close to the mounting frame (1), and the inner wall of the sliding groove is slidably connected with two L-shaped limiting blocks (404).

2. A multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 1, characterized in that: The strip-shaped plug block (202) is adapted to the card slot, and the flexible connecting piece (203) is made of silicone.

3. The multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 1, characterized in that: A circular hole matching the connecting rod (303) is provided on a side of the positioning frame (301) away from the mounting frame (1), and an end of the connecting rod (303) away from the movable plate (302) passes through the circular hole and is fixedly connected to the bar frame (401).

4. The multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 1, characterized in that: One end of the extrusion spring (304) is fixedly connected to the inner wall of the positioning frame (301), and the other end is fixedly connected to the movable plate (302).

5. The multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 1, characterized in that: The rear end of the forward and reverse threaded rod (402) is rotatably connected to the inner rear wall of the bar frame (401), and the two movable blocks (403) are respectively threadedly connected to the forward and reverse threads on the surface of the forward and reverse threaded rod (402).

6. The multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 1, characterized in that: The two movable blocks (403) are respectively fixedly connected to two L-shaped limit blocks (404) on one side close to the mounting frame (1), and the two L-shaped limit blocks (404) are respectively matched with the bar-shaped through hole, the slot and the limit groove.

7. The multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 1, characterized in that: The buffer assembly (5) comprises a positioning plate (501), the upper surface of the positioning plate (501) is provided with a straight groove, the inner wall of the straight groove is fixedly connected to a round rod (502), the surface of the round rod (502) is sleeved with two buffer springs (503), the inner bottom wall of the straight groove is slidably connected to two moving blocks (504), and the lower surface of the positioning plate (501) is fixedly connected to a silicone pad (505).

8. The multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 7, characterized in that: The two moving blocks (504) are both slidably connected to the surface of the round rod (502), and the opposite ends of the two buffer springs (503) are respectively fixedly connected to the opposite back surfaces of the two moving blocks (504), and the opposite ends of the two buffer springs (503) are respectively fixedly connected to the left and right inner walls of the slot.

9. The multi-layer circuit board quick board structure capable of preventing the circuit board from moving and colliding according to claim 7, characterized in that: The upper surfaces of the two moving blocks (504) are fixedly connected to a first rotating frame (506), and the inner walls of the two first rotating frames (506) are rotatably connected to a transmission rod (507).

10. A method for using a multi-layer circuit board allegro structure capable of preventing the circuit board from moving and colliding, characterized in that: A multilayer circuit board quick board structure capable of preventing a circuit board from moving and colliding is adopted according to any one of claims 1 to 9, further comprising the following steps: Step 1: Pull the bar frame (401) toward both sides, so that the bar frame (401) drives the movable plate (302) to move in the positioning frame (301) through the connecting rod (303). During this process, the spring (304) is squeezed to deform until the two L-shaped limit blocks (404) are separated from the slots, thereby making room for the installation of the circuit board module (2); Step 2: insert the plurality of circuit board modules (2) into the slots of the mounting frame (1) through the two strip-shaped insert blocks (202), then release the strip frame (401), and the compression spring (304) drives the strip frame (401) back to its original position by its own reaction force, so that the two L-shaped limit blocks (404) are inserted into the slots of the strip-shaped insert blocks (202); Step 3: Rotate the positive and negative threaded rods (402) on the front side of the bar frame (401) corresponding to the slot position. Due to the threaded connection between the positive and negative threaded rods (402) and the two movable blocks (403), the positive and negative threaded rods (402) rotate to drive the two movable blocks (403) to move toward opposite sides, thereby driving the two L-shaped limit blocks (404) to insert into the limit grooves on the inner wall of the slot, thereby achieving accurate positioning of the circuit board module (2) and ensuring that the circuit board module (2) will not be displaced during subsequent use; Step 4: After the circuit board body (201) is installed, its lower side contacts the buffer plate (509). When vibration occurs, the circuit board body (201) deforms downward and drives the buffer plate (509) to move downward. The buffer plate (509) drives the two moving blocks (504) to move toward opposite sides on the surface of the round rod (502) through the two second rotating frames (508) and the transmission rod (507). The moving blocks (504) squeeze the buffer spring (503). The deformation of the buffer spring (503) weakens the bending of the circuit board body (201) to avoid collision between the two layers of the circuit board body (201). At the same time, if the circuit board body (201) bends upward, it will be buffered by the silicone pad (505), which can also avoid collision between the two layers of the circuit board body (201), thereby achieving a good protective effect on the circuit board body (201).

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