A computer motherboard test fixture

By designing a computer motherboard testing fixing device with a fixing plate, pressing mechanism, clamping mechanism and limiting mechanism, the problem of motherboard shaking affecting testing accuracy is solved. It achieves stable clamping and convenient adjustment, and improves the accuracy of testing and the stability of the fixing mechanism.

CN119609967BActive Publication Date: 2025-10-28ZHENGZHOU JINGXIAO INFORMATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411414113.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-11
Publication Date
2025-10-28
Estimated Expiration
2044-10-11

AI Technical Summary

Technical Problem

Traditional motherboard testing fixtures cannot completely prevent motherboard shaking, which affects the stability of the testing environment and the accuracy of test results, and may also place an additional burden on the fixing mechanism.

Method used

A computer motherboard testing fixing device is adopted, which includes a fixing plate, a pressing mechanism, a clamping mechanism and a limiting mechanism. Through the design of elastic band, moving block and card plate, it can achieve stable clamping and angle adjustment of motherboard, eliminate shaking and improve testing accuracy.

Benefits of technology

It effectively eliminates motherboard wobble, improves testing accuracy, ensures the stability of the fixing mechanism, adapts to different motherboard thicknesses and angle requirements, and enables convenient adjustment and secure clamping.

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Abstract

The present invention relates to the field of test fixation technology, and discloses a computer motherboard test fixture, comprising a fixing plate, wherein two sets of sliding grooves are provided on the top of the fixing plate, and the walls of the two sets of sliding grooves are provided with first sliding rods, and the left and right ends of the two sets of first sliding rods are fixedly connected to the walls of the sliding grooves. The invention is characterized in that it also includes a pressing mechanism, wherein the pressing mechanism includes a fixing seat, the bottom of the fixing seat is fixedly connected to the middle end of the top of the fixing plate, the top of the fixing seat is fixedly connected to a spring rod, and the top of the spring rod is fixedly connected to a receiving plate. The present invention can pull the arc plate to different distances by setting a moving block, so that different degrees of adjustment can be performed when facing different motherboards, and the moving block can be moved by pressing the positioning plate. When it moves to the specified position, it only needs to release the positioning plate, which is very convenient for adjusting the arc plate.
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Description

Technical Field

[0001] This invention relates to the field of testing and fixing technology, specifically to a testing and fixing device for computer motherboards. Background Technology

[0002] The motherboard is a fundamental component of a computer. It is usually a rectangular circuit board that integrates various circuits, interfaces, and components to connect and integrate the various hardware devices of the computer, enabling them to work together. The core of the motherboard consists of the Northbridge chip and the Southbridge chip. The Northbridge chip is mainly responsible for processing high-speed data, such as communication between the CPU and memory and graphics card; the Southbridge chip is responsible for low-speed data transmission, such as the control of hard drive, USB and other interfaces.

[0003] Patent application CN202021119879.9 discloses a motherboard testing and fixing device for computers. The motherboard testing and fixing device includes: a housing; a rotating rod rotatably mounted inside the housing, with one end extending outside the housing; a spur gear fixedly sleeved on the rotating rod; and a first rack slidably mounted inside the housing.

[0004] In the precision testing of computer motherboards, traditional fixing devices often cannot completely avoid the slight vibrations of the motherboard. This uncontrolled vibration not only seriously interferes with the stability of the testing environment, causing a significant reduction in the accuracy of the collected data and affecting the accuracy of the test results, but may also place an additional burden on the fixing mechanism itself. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a motherboard testing and fixing device for computers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a computer motherboard testing and fixing device, comprising a fixing plate, wherein two sets of sliding grooves are formed on the top of the fixing plate, and each set of sliding grooves is provided with a first sliding rod on its groove wall, wherein the left and right ends of the two sets of first sliding rods are fixedly connected to the groove wall of the sliding groove, and further comprising:

[0007] The pressing mechanism includes a fixed base, the bottom of which is fixedly connected to the middle of the top of a fixed plate. A spring rod is fixedly connected to the top of the fixed base, a receiving plate is fixedly connected to the top of the spring rod, and a base plate is fixedly connected to the top of the receiving plate. Rotating plates are rotatably connected to both sides of the base plate via rotating shafts. An elastic band is fixedly connected to the side of each set of rotating plates that is close to each other. The tops of both sets of rotating plates are fixedly connected to a contact plate.

[0008] A clamping mechanism, the clamping mechanism including a first sliding block, a first sliding rod located at the front side passing through the first sliding block and slidably connected to it, a load-bearing rod fixedly connected to the top of the first sliding block, and a second sliding rod provided on one side of the load-bearing rod near the spring rod, the upper and lower ends of the second sliding rod being fixedly connected to the load-bearing rod;

[0009] A limiting mechanism includes a second sliding block. A first sliding rod located at the front passes through and is slidably connected to the second sliding block. A third sliding rod is fixedly connected to the top of the second sliding block. A protective plate is fixedly connected to the top of the third sliding rod. A first connecting block is slidably connected to the outer wall of the third sliding rod. A connecting rod is fixedly connected to the side of the first connecting block near the spring rod. A first rotating block is fixedly connected to the side of the connecting rod away from the first connecting block. A rotating rod is rotatably connected to the side of the first rotating block away from the connecting rod via a rotating shaft. A second rotating block is rotatably connected to the side of the rotating rod away from the connecting rod via a rotating shaft. A second connecting block is fixedly connected to the side of the second rotating block away from the connecting rod. A dustproof shell is fixedly connected to the side of the connecting block away from the connecting rod. A rotating column is provided on the inner wall of the dustproof shell. Both ends of the rotating column are fixedly connected to the dustproof shell. A clamping plate is fixedly connected to the outer wall of the rotating column. A first pressing plate and a second pressing plate are fixedly connected to the inner wall of the clamping plate. A second spring is fixedly connected to the top of the first pressing plate. The top of the second spring is fixedly connected to the inner wall of the dustproof shell. A third spring is fixedly connected to the bottom of the second pressing plate. The bottom of the third spring is fixedly connected to the bottom of the inner wall of the dustproof shell. The second spring and the first pressing plate, and the second pressing plate and the third spring are each set in two groups and are all set at an angle with the rotating column as the center. The limiting mechanism is set in four groups and is installed at the top four corners of the fixed plate.

[0010] According to the above technical solution, a rectangular plate is provided on the top of the load-bearing rod near the spring rod, and a sliding ring is fixedly connected to the side of the rectangular plate away from the spring rod.

[0011] According to the above technical solution, the inner wall of the sliding ring is slidably connected to the second sliding rod, the top and bottom of the rectangular plate are in contact with the arc plate, a protective shell is fixedly connected to the side of the rectangular plate away from the spring rod, and moving blocks are slidably connected to the upper and lower ends of the two sets of protective shells.

[0012] According to the above technical solution, the side of the upper arc-shaped plate near the rectangular plate is fixedly connected to the upper movable block, and the side of the lower arc-shaped plate near the rectangular plate is fixedly connected to the lower movable block. The four sets of movable blocks are fixedly connected to the side near the protective shell with a first spring, and the four sets of first springs are fixedly connected to the side away from the movable block with a positioning plate. The four sets of positioning plates are in contact with the hollow part of the protective shell. The clamping mechanism is set in two sets, symmetrically arranged with the middle of the fixed plate as the center.

[0013] Compared with the prior art, the present invention provides a motherboard testing and fixing device for computers, which has the following beneficial effects:

[0014] 1. This invention uses an elastic band to cause the rotating plate to rotate when it receives the shaking force of the motherboard. At this time, the elastic band will be stretched by the tension force. As the elastic band is stretched, it will also counteract the shaking force of the motherboard with its own rebound force, thereby offsetting the shaking force of the motherboard and making the test more accurate.

[0015] 2. This invention allows the curved plate to be moved to different distances by setting a movable block, which enables different degrees of adjustment when facing different motherboards. The movable block can be moved by pressing the positioning plate, and the positioning plate can be released when it is moved to the designated position, making the adjustment of the curved plate very convenient.

[0016] 3. By setting the first pressing plate and the second pressing plate, the thickness of the motherboard can be automatically detected and clamped by the elastic force carried by the third spring and the second spring itself. Furthermore, by setting them at the four corners of the motherboard, the motherboard can be more firmly fixed and is less likely to slip.

[0017] 4. This invention allows the dust cover to be rotated at different angles by setting a rotating rod. When the card plate is fixing the motherboard, it can be rotated to different positions by rotating the second rotating block, so that the card plate can fix the motherboard at different positions at different angles, thus achieving different degrees of fixing effect. Attached Figure Description

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the pressing mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the clamping structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the rectangular plate structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the movable block of the present invention;

[0024] Figure 7 This is a schematic diagram of the limiting mechanism of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the second connecting block of the present invention.

[0026] In the diagram: 1. Fixed plate; 2. First sliding rod; 3. Sliding groove; 4. Pressing mechanism; 401. Contact plate; 402. Rotating plate; 403. Elastic band; 404. Receiving plate; 405. Spring rod; 406. Fixed seat; 407. Base plate; 5. Clamping mechanism; 501. First sliding block; 502. Load-bearing rod; 503. Second sliding rod; 504. Arc plate; 505. Protective shell; 506. Sliding ring; 507. Moving block; 508. First spring; 509. 510. Positioning plate; 6. Rectangular plate; 7. Limiting mechanism; 601. Second sliding block; 602. Third sliding rod; 603. Protective plate; 604. Dustproof shell; 605. First connecting block; 606. Connecting rod; 607. First rotating block; 608. Rotating rod; 609. Second rotating block; 610. Second connecting block; 611. Rotating column; 612. Second spring; 613. First pressing plate; 614. Second pressing plate; 615. Third spring; 616. Clamping plate. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Example 1: See Figures 1-3 The present invention provides a technical solution: a motherboard testing and fixing device for computers, comprising a fixing plate 1, two sets of sliding grooves 3 formed on the top of the fixing plate 1, each set of sliding grooves 3 having a first sliding rod 2 provided on its groove wall, the left and right ends of the two sets of first sliding rods 2 being fixedly connected to the groove wall of the sliding groove 3, and further comprising:

[0031] The pressing mechanism 4 includes a fixed base 406, the bottom of which is fixedly connected to the top middle of the fixed plate 1. A spring rod 405 is fixedly connected to the top of the fixed base 406. By setting the spring rod 405, when the computer motherboard is placed, pressing the spring rod 405 can provide a certain buffer. During testing, the spring rod 405 can absorb the shaking force generated during the test, thereby reducing the shaking force. A receiving plate 404 is fixedly connected to the top of the spring rod 405. A base plate 407 is fixedly connected to the top of the receiving plate 404. Rotating plates 402 are rotatably connected to the left and right sides of the base plate 407 via rotating shafts. An elastic band 403 is fixedly connected to the side of the two sets of rotating plates 402 that are close to each other. The tops of the two sets of rotating plates 402 are fixedly connected to the contact plate 401.

[0032] The working principle of this embodiment is as follows: When the staff needs to test the computer motherboard, it needs to be fixed. First, the computer motherboard is placed on the contact plate 401. At this time, the contact plate 401 will press the rotating plate 402, causing the rotating plate 402 to continue pressing the base plate 407, which in turn presses the receiving plate 404. This causes the spring rod 405 to contract under the downward pressure of the receiving plate 404. When the computer motherboard is tested, it may shake during the test. This may cause other fixing mechanisms to become unstable under prolonged shaking. When the computer motherboard shakes, it also causes the contact plate 401 to shake. The contact plate 401 then drives the rotating plate 402 to rotate. When the rotating plate 402 rotates, it pulls the elastic band 403 to stretch. This causes the rotational force of the rotating plate 402 to disappear due to the stretching of the elastic band 403, thus preventing the computer motherboard from shaking.

[0033] Example 2: Please refer to Figures 4-6Based on Embodiment 1, the present invention provides a technical solution: a clamping mechanism 5, comprising a first sliding block 501, a first sliding rod 2 located on the front side passing through and slidably connected to the first sliding block 501, a load-bearing rod 502 fixedly connected to the top of the first sliding block 501, a second sliding rod 503 provided on one side of the load-bearing rod 502 near the spring rod 405, both ends of the second sliding rod 503 being fixedly connected to the load-bearing rod 502, the inner wall of the sliding ring 506 being slidably connected to the second sliding rod 503, the top and bottom of the rectangular plate 510 contacting the arc-shaped plate 504, a protective shell 505 fixedly connected to the side of the rectangular plate 510 away from the spring rod 405, and movable blocks 507 slidably connected to the upper and lower ends of both sets of protective shells 505. By setting the movable blocks 507, the position of the arc-shaped plate 504 can be adjusted in one step, so that when adjusting the computer motherboard, it can be... Fine-tuning is performed to achieve a one-step fixation of the computer motherboard. The side of the upper arc plate 504 near the rectangular plate 510 is fixedly connected to the upper movable block 507, and the side of the lower arc plate 504 near the rectangular plate 510 is fixedly connected to the lower movable block 507. The side of each of the four movable blocks 507 near the protective shell 505 is fixedly connected to a first spring 508, and the side of each of the four first springs 508 away from the movable block 507 is fixedly connected to a positioning plate 509. By setting the movement of the positioning plate 509, when the positioning plate 509 is no longer pressed, the positioning plate 509 can be automatically positioned by the rebound force of the first spring 508, so that secondary fixation is not required. All four positioning plates 509 are in contact with the cutout of the protective shell 505. The clamping mechanism 5 is set in two sets, symmetrically arranged with the middle of the fixing plate 1 as the center.

[0034] The working principle of this embodiment is as follows: When the operator wants to place the computer motherboard on top of the contact plate 401, the first sliding block 501 is slid to a suitable position, and the sliding rectangular plate 510 is moved up or down to adjust the distance. After the distance adjustment is completed, the computer motherboard can be placed on the contact plate 401. Then, the positioning plate 509 is pressed down. At this time, the first spring 508 begins to contract, so that the positioning plate 509 is no longer in contact with the cutout of the protective shell 505, allowing the moving block 507 to slide. The moving block 507 drives the arc plate 504 to slide to different degrees, thus moving it to fit the computer motherboard. At this time, it is no longer necessary to move the moving block 507. The operator releases the pressure on the positioning plate 509. The first spring 508 will rebound, and the rebound of the first spring 508 will drive the positioning plate 509 to rise, so that the positioning plate 509 will fit with the cutout of the protective shell 505 again, completing the work.

[0035] Example 3: Please refer to Figures 7-8Based on Embodiments 1 and 2, the present invention provides a technical solution: a limiting mechanism 6, which includes a second sliding block 601, a first sliding rod 2 located on the front side passing through the second sliding block 601 and slidably connected thereto, a third sliding rod 602 fixedly connected to the top of the second sliding block 601, a protective plate 603 fixedly connected to the top of the third sliding rod 602, a first connecting block 605 slidably connected to the outer wall of the third sliding rod 602, and a connecting rod 606 fixedly connected to the side of the first connecting block 605 near the spring rod 405, the connecting rod 606 being away from the first... A first rotating block 607 is fixedly connected to one side of the connecting block 605. A rotating rod 608 is rotatably connected to the side of the first rotating block 607 away from the connecting rod 606 via a rotating shaft. A second rotating block 609 is rotatably connected to the side of the rotating rod 608 away from the connecting rod 606 via a rotating shaft. A second connecting block 610 is fixedly connected to the side of the second rotating block 609 away from the connecting rod 606. A dustproof shell 604 is fixedly connected to the side of the second connecting block 610 away from the connecting rod 606. A rotating column 611 is provided on the inner wall of the dustproof shell 604. The rotating column 611 has two ends... All are fixedly connected to the dustproof shell 604. A retaining plate 616 is fixedly connected to the outer wall of the rotating column 611. A first pressing plate 613 and a second pressing plate 614 are fixedly connected to the inner wall of the retaining plate 616. A second spring 612 is fixedly connected to the top of the first pressing plate 613. The top of the second spring 612 is fixedly connected to the inner wall of the dustproof shell 604. A third spring 615 is fixedly connected to the bottom of the second pressing plate 614. The bottom of the third spring 615 is fixedly connected to the bottom of the inner wall of the dustproof shell 604. The second spring 612 and the first pressing plate 613, the second pressing plate 614 and the third spring 614 are all fixedly connected. Each of the 15 is set in two groups. By setting the first pressing plate 613 and the second pressing plate 614, the computer motherboard can be automatically pulled away by the second spring 612 and the third spring 615 when it comes into contact with the motherboard. The second spring 612 and the third spring 615 can push the first pressing plate 613 and the second pressing plate 614 to fix the computer motherboard by the rebound force. They are all set at an angle with the rotating column 611 as the center. The limiting mechanism 6 is set in four groups and is installed at the top four corners of the fixing plate 1.

[0036] The working principle of this embodiment is as follows: When fixing the computer motherboard, the operator moves the second sliding block 601 on the sliding rod 2 to a suitable distance and then stops. The first connecting block 605 is then slid to the appropriate position. If different angles of the computer motherboard need to be fixed, the operator rotates the second connecting block 610 to adjust the angle. The second connecting block 610 drives the rotating rod 608 between the first connecting block 605 and the second connecting block 610, thus completing the angle adjustment without obstruction. At this time, the dust cover 604 is also driven by the second connecting block 610 to rotate synchronously, causing the rotating column 611 to also rotate. The rotating column 611 drives the card plate 616 to rotate to the same position. At this time, the four corners of the computer motherboard will be locked in the gaps of the card plate 616, causing the computer motherboard to contact the first pressing plate 613 and the second pressing plate 614. The computer motherboard will continue to move, causing the first pressing plate 613 and the second pressing plate 614 to move up and down, so that the computer motherboard contacts the first pressing plate 613 and the second pressing plate 614. The second spring 612 and the third spring 615 start to rebound, thereby pushing the first pressing plate 613 and the second pressing plate 614 to fix the computer motherboard, thus completing the work.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A motherboard testing and fixing device for computers, comprising a fixing plate (1), wherein two sets of sliding grooves (3) are formed on the top of the fixing plate (1), and each set of sliding grooves (3) is provided with a first sliding rod (2) on its groove wall, and the left and right ends of the two sets of first sliding rods (2) are fixedly connected to the groove wall of the sliding groove (3), characterized in that, Also includes: The pressing mechanism (4) includes a fixed seat (406), the bottom of which is fixedly connected to the middle of the top of the fixed plate (1), a spring rod (405) is fixedly connected to the top of the fixed seat (406), a receiving plate (404) is fixedly connected to the top of the spring rod (405), a base plate (407) is fixedly connected to the top of the receiving plate (404), and a rotating plate (402) is rotatably connected to the left and right sides of the base plate (407) via a rotating shaft. An elastic band (403) is fixedly connected to the side of the two sets of rotating plates (402) that are close to each other. The tops of the two sets of rotating plates (402) are fixedly connected to a contact plate (401). The clamping mechanism (5) includes a first sliding block (501), and a first sliding rod (2) located on the front side passes through the first sliding block (501) and is slidably connected to it. A load-bearing rod (502) is fixedly connected to the top of the first sliding block (501). A second sliding rod (503) is provided on one side of the load-bearing rod (502) near the spring rod (405). Both the upper and lower ends of the second sliding rod (503) are fixedly connected to the load-bearing rod (502). The limiting mechanism (6) includes a second sliding block (601), a first sliding rod (2) located on the front side passes through the second sliding block (601) and is slidably connected to it, a third sliding rod (602) is fixedly connected to the top of the second sliding block (601), a protective plate (603) is fixedly connected to the top of the third sliding rod (602), a first connecting block (605) is slidably connected to the outer wall of the third sliding rod (602), and a connecting rod is fixedly connected to the side of the first connecting block (605) near the spring rod (405). A rod (606) is connected to a first rotating block (607) on the side of the connecting rod (606) away from the first connecting block (605). A rotating rod (608) is rotatably connected to the side of the first rotating block (607) away from the connecting rod (606) via a rotating shaft. A second rotating block (609) is rotatably connected to the side of the rotating rod (608) away from the connecting rod (606) via a rotating shaft. A second connecting block (610) is fixedly connected to the side of the second rotating block (609) away from the connecting rod (606). 610) A dustproof shell (604) is fixedly connected to the side away from the connecting rod (606). A rotating column (611) is provided on the inner wall of the dustproof shell (604). Both the upper and lower ends of the rotating column (611) are fixedly connected to the dustproof shell (604). A clamping plate (616) is fixedly connected to the outer wall of the rotating column (611). A first pressing plate (613) and a second pressing plate (614) are fixedly connected to the inner wall of the clamping plate (616). A second spring (612) is fixedly connected to the top of the first pressing plate (613). The second spring (614) is fixedly connected to the top of the first pressing plate (613). 2) The top is fixedly connected to the inner wall of the dustproof shell (604), and the bottom of the second pressing plate (614) is fixedly connected to the third spring (615). The bottom of the third spring (615) is fixedly connected to the bottom of the inner wall of the dustproof shell (604). The second spring (612) and the first pressing plate (613), the second pressing plate (614) and the third spring (615) are all set in two groups, and are all set at an angle with the rotating column (611) as the center. The limiting mechanism (6) is set in four groups and is installed at the top four corners of the fixed plate (1).

2. The motherboard testing and fixing device for computers according to claim 1, characterized in that: A rectangular plate (510) is provided on the top of the load-bearing rod (502) near the spring rod (405), and a sliding ring (506) is fixedly connected to the side of the rectangular plate (510) away from the spring rod (405).

3. The motherboard testing and fixing device for computers according to claim 2, characterized in that: The inner wall of the sliding ring (506) is slidably connected to the second sliding rod (503). The top and bottom of the rectangular plate (510) are in contact with the arc plate (504). A protective shell (505) is fixedly connected to the side of the rectangular plate (510) away from the spring rod (405). Moving blocks (507) are slidably connected to the upper and lower ends of the two sets of protective shells (505).

4. The motherboard testing and fixing device for computers according to claim 3, characterized in that: The side of the upper arc plate (504) near the rectangular plate (510) is fixedly connected to the upper movable block (507). The side of the lower arc plate (504) near the rectangular plate (510) is fixedly connected to the lower movable block (507). The four sets of movable blocks (507) are fixedly connected to the side of the protective shell (505) with a first spring (508). The four sets of first springs (508) are fixedly connected to the side away from the movable block (507) with a positioning plate (509). The four sets of positioning plates (509) are in contact with the hollow part of the protective shell (505). The clamping mechanism (5) is set in two sets, which are symmetrically arranged with the middle of the fixed plate (1) as the center.

Citation Information

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