Circuit board detection device

Abstract

The utility model relates to a circuit board detection device. The circuit board detection device comprises a case, a detection platform and a detection tool, wherein a detection host is arranged in the case. The detection platform is arranged on the outer side face of the case and comprises a first butt joint part, and the detection host is electrically connected with the first butt joint part. The detection tool is arranged on the detection platform and is used for bearing and positioning a circuit board to be detected; the detection tool comprises a second butt joint part, the second butt joint part is configured to be used for being connected with the first butt joint part in a matched mode, and the second butt joint part can be electrically connected with the positioned circuit board. And the detection tool for bearing and positioning the circuit board to be detected is arranged on the detection platform outside the case, and is matched with the first butt joint part by arranging a second butt joint part electrically connected with the circuit board. As the detection tool is located outside the case, the circuit board does not need to enter and exit from the case when being loaded and unloaded on the detection tool, the loading and unloading convenience of the circuit board is improved, and the working efficiency of circuit board detection is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery detection, in particular to a circuit board detection device. BACKGROUND

[0002] A flow battery is an electrochemical energy storage technology, which is composed of an electric pile unit, an electrolyte, an electrolyte storage and supply unit, and a management and control unit. It is a high-performance storage battery that uses positive and negative electrolytes separately and circulates each other. It has the characteristics of high capacity, wide application field, long cycle service life, etc.

[0003] There are various types of circuit boards in a flow battery, such as relay boards, CCS boards, IO boards, and charging boards. Before each type of circuit board is applied to a flow battery, it needs to be tested for performance to assemble the qualified circuit board in the flow battery.

[0004] The traditional circuit board detection device generally carries and positions the circuit board by setting a detection tool, and then detects the circuit board on the detection tool. However, when the circuit board is unloaded from the detection tool, it is not convenient to operate. CONTENT OF THE INVENTION

[0005] Therefore, it is necessary to provide a circuit board detection device, which is set outside the case by a detection tool, thereby improving the convenience of loading and unloading the circuit board.

[0006] The present application provides a circuit board detection device, which comprises:

[0007] A case, wherein a detection host is arranged inside the case;

[0008] A detection platform is arranged on the outer side of the case, wherein the detection platform comprises a first docking portion, and the detection host is electrically connected to the first docking portion;

[0009] A detection tool is arranged on the detection platform and used for carrying and positioning a circuit board to be detected, wherein the detection tool comprises a second docking portion, the second docking portion is configured to be matched with the first docking portion, and the second docking portion can be electrically connected to the positioned circuit board.

[0010] In one embodiment, a plurality of detection tools are arranged, and the plurality of detection tools are replaceably connected to the detection platform.

[0011] Each detection tool is adapted to a certain specification of the circuit board.

[0012] In one embodiment, the detection platform comprises:

[0013] A support table is used for carrying the detection tool.

[0014] a guide portion disposed on the support table in the first direction, the detection tool being movable along the guide portion to a preset position;

[0015] in the preset position, the first interface portion is mated with the second interface portion.

[0016] In one embodiment, the detection platform further comprises:

[0017] a locking assembly configured to lock the detection tool in the preset position.

[0018] In one embodiment, the locking assembly comprises:

[0019] a locking drive member;

[0020] a locking block connected to a driving end of the locking drive member, the locking block being rotatable under the driving of the locking drive member;

[0021] a corresponding avoiding hole is provided on the detection tool, when the detection tool is moved to the preset position, the locking block is inserted into the avoiding hole, and when the locking block rotates, at least part of the locking block avoids the avoiding hole to abut against the detection tool.

[0022] In one embodiment, the detection tool comprises a carrying box, an avoiding hole is provided on a side wall of the carrying box, the locking block is inserted into the carrying box through the avoiding hole and can abut against an inner wall of the carrying box.

[0023] In one embodiment, the detection tool comprises:

[0024] a carrying box, the carrying box being provided on the detection platform and being used for accommodating a wire connected between the second interface portion and the circuit board;

[0025] a carrying plate provided on the carrying box and being used for carrying the circuit board, the carrying plate being provided with a probe, the probe being used for electrically connecting the circuit board;

[0026] a pressing assembly provided on the carrying box and being used for pressing the circuit board on the carrying plate.

[0027] In one embodiment, the pressing assembly comprises:

[0028] two groups of mounting blocks, the two groups of mounting blocks being spaced apart on the carrying plate and defining a region for carrying the circuit board between the two groups of mounting blocks;

[0029] A pressing plate is movably arranged on two sides of the mounting block, and the pressing plate can be moved to press the circuit board on the bearing plate or avoid the pressing plate relative to the mounting block.

[0030] In one of the embodiments, the pressing assembly further comprises:

[0031] A bracket comprises two connecting parts and a handle part, the two connecting parts are respectively connected to the pressing plate and the corresponding mounting block, the handle part connects the two connecting parts, and a gap is reserved between the handle part and the pressing plate;

[0032] The mounting block is provided with a locking part, and when the bracket is moved to the position where the pressing plate presses the circuit board, the locking part locks the bracket.

[0033] In one of the embodiments, the connecting part extends along the length direction of the side of the pressing plate connected thereto, one end of the connecting part is fixedly connected to the pressing plate, and the other end of the connecting part is provided with a first guide column toward the side of the corresponding mounting block, and the corresponding mounting block is provided with a first sliding groove, and the first guide column can slide along the first sliding groove.

[0034] The other end of the connecting part is also provided with a second sliding groove, and the pressing plate is correspondingly provided with a second guide column, and the second guide column can slide in the second sliding groove.

[0035] The other end of the connecting part is also provided with a third sliding groove, and the mounting block is correspondingly provided with a third guide column, and the third guide column can slide in the third sliding groove.

[0036] In the state that the pressing plate presses the circuit board, the first guide column, the second guide column and the third guide column are arranged in a triangular shape, and when the pressing plate is rotated to avoid the circuit board, the sliding of the first guide column in the first sliding groove, the second guide column in the second sliding groove and the third guide column in the third sliding groove makes the pressing plate keep away from the circuit board.

[0037] The above-mentioned circuit board detection device sets the detection host in the case, sets the detection platform on the outer side of the case, and connects the detection host through the first docking part of the detection platform. The detection tool for bearing and positioning the circuit board to be detected is arranged on the detection platform outside the case, and is connected with the first docking part through the second docking part arranged to be electrically connected with the circuit board, so as to realize the connection between the circuit board and the detection body. Since the detection tool is located outside the case, the circuit board does not need to enter and exit the case when it is fed and discharged on the detection tool, which improves the convenience of feeding and discharging the circuit board and is beneficial to improve the work efficiency of the circuit board detection. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 A structural schematic view of a circuit board detection device provided in an embodiment of the present application;

[0039] Figure 2 A structural schematic view of a detection platform and a detection tool provided in an embodiment of the present application;

[0040] Figure 3 A structural schematic view of a locking assembly provided in an embodiment of the present application;

[0041] Figure 4 A structural schematic view of a detection tool provided in an embodiment of the present application from one perspective;

[0042] Figure 5 A structural schematic view of a detection tool provided in an embodiment of the present application from another perspective;

[0043] Figure 6 An exploded structural schematic view of a detection tool provided in an embodiment of the present application;

[0044] Figure 7 A structural schematic view of a box body provided in an embodiment of the present application.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 1, case;

[0047] 2, detection platform; 21, support table; 22, guide portion; 23, locking assembly; 231, locking driving member; 232, locking block;

[0048] 3, detection tool; 32, bearing box; 321, box body; 3211, avoiding hole; 322, box cover; 33, bearing plate; 34, pressing assembly; 341, mounting block; 3411, first sliding groove; 3412, third guide column; 342, pressing plate; 3421, second guide column; 343, support; 3431, connecting portion; 34311, first guide column; 34312, second sliding groove; 34313, third sliding groove; 3432, handle portion; 35, self-locking pin; 36, safety device; 361, knob; 362, baffle;

[0049] 4, industrial computer;

[0050] 5, display. DETAILED DESCRIPTION

[0051] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0052] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0053] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0054] In the present application, unless otherwise specifically defined and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, unless specifically defined and limited otherwise, if there is a description of a first feature on or above or below a second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature can be above or above or above the second feature, or the first feature can be directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature can be below or below or below the second feature, or the first feature can be directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0056] It should be noted that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0057] Referring to Figure 1 , Figure 1 The structure of the circuit board detection device provided in an embodiment of the present application is shown. The embodiment of the present application provides a circuit board detection device for detecting the circuit board of a flow battery. The test of the circuit board mainly includes power supply voltage test, current test, various communication tests, precision calibration and test, fault function test, address test, etc. In other embodiments, the tested function can also be other functions, which are not specifically limited here, and are determined according to actual needs.

[0058] Specifically, the circuit board detection device includes a case 1, a detection platform 2 and a detection tool 3, and the case 1 is provided with a detection host. The detection platform 2 is arranged on the outer side of the case 1, and the detection platform 2 includes a first docking part, and the detection host is electrically connected with the first docking part. The detection tool 3 is arranged on the detection platform 2 and is used for carrying and positioning the circuit board to be detected. The detection tool 3 includes a second docking part, and the second docking part is configured to be matched with the first docking part, and the second docking part can be electrically connected with the positioned circuit board.

[0059] The circuit board detection device provided by the embodiment of the present application sets the detection host in the case 1, sets the detection platform 2 on the outer side of the case 1, and connects the detection host through the first docking part of the detection platform 2. The detection tool 3 for carrying and positioning the circuit board to be detected is set on the detection platform 2 outside the case 1, and the second docking part electrically connected with the circuit board is set to realize the matching with the first docking part, so that the connection between the circuit board and the detection host is realized. Since the detection tool 3 is located outside the case 1, the circuit board does not need to enter and exit the case 1 when the circuit board is fed and discharged on the detection tool 3, the convenience of feeding and discharging the circuit board is improved, and the working efficiency of the circuit board detection is improved.

[0060] Optionally, the first docking part and the second docking part are respectively set as a connector male end and a connector female end, and the electrical connection is realized by inserting the connector male end and the connector female end.

[0061] Further, the circuit board detection device further comprises an industrial computer 4, a display 5, a program-controlled power supply and the like. The program-controlled power supply supplies power to the whole device. The detection host is signal connected with the industrial computer 4, and the detection data is displayed on the display 5. This is the conventional structure of the traditional circuit board detection device, which will not be described in detail here.

[0062] In some embodiments, in order to make the circuit board detection device applicable to circuit boards of various specifications, a plurality of detection tools 3 are provided, the plurality of detection tools 3 are replaceably connected with the detection platform 2, and each detection tool 3 is adapted to a circuit board of a specification. In actual work, the detection tool 3 adapted to the size specification of the circuit board to be detected can be selected.

[0063] In some embodiments, as shown in Figure 1 The detection platform 2 comprises a support table 21 and a guide part 22. The support table 21 is used for carrying the detection tool 3. The guide part 22 is arranged on the support table 21 along a first direction. The detection tool 3 can move along the guide part 22 to a preset position. In the preset position, the first docking part matches with the second docking part. The first direction is perpendicular to the side of the case 1 on which the detection platform 2 is located.

[0064] After the detection tool 3 required is selected, the detection tool 3 is placed on the support table 21, and the detection tool 3 is pushed along the guide part 22 towards the case 1 until the first docking part matches with the second docking part to reach the preset position.

[0065] Specifically, the guide part 22 is a guide plate arranged on both sides of the support table 21, and the two guide plates are arranged in parallel. The first docking part is arranged at one end of the detection platform 2 close to the case 1, and the second docking part is arranged on the end surface of the detection tool 3 facing the case 1, so that after the detection tool 3 is pushed to the position towards the case 1, the first docking part is inserted and matched with the second docking part.

[0066] In some embodiments, as shown in Figure 2 The detection platform 2 further comprises a locking assembly 23 configured to lock the detection tool 3 in a preset position so as to provide stable bearing and positioning of the circuit board by the detection tool 3.

[0067] Specifically, in combination with Figure 3 and Figure 4 The locking assembly 23 comprises a locking driving member 231 and a locking block 232 connected to a driving end of the locking driving member 231 and capable of rotating under the driving of the locking driving member 231. A corresponding avoiding hole 3211 is provided on the detection tool 3. When the detection tool 3 moves to the preset position, the locking block 232 is inserted into the avoiding hole 3211, and at least part of the locking block 232 avoids the avoiding hole 3211 to abut against the detection tool 3 when rotating, so as to form an obstruction to the detection tool 3, thereby fixing the detection tool 3 in the preset position.

[0068] Optionally, the detection platform 2 further comprises a vertical plate provided on an end of the support table 21 close to the cabinet 1, and the first docking portion and the locking driving member 231 can be provided on the vertical plate.

[0069] The structure of the detection tool 3 will be described below in combination with Figures 5-7

[0070] In some embodiments, the detection tool 3 comprises a bearing box 32, a bearing plate 33 and a pressing assembly 34. The bearing box 32 is provided on the detection platform 2 and used for accommodating wires connected between the second docking portion and the circuit board. The bearing plate 33 is provided on the bearing box 32 and used for bearing the circuit board. The bearing plate 33 is provided with probes used for electrically connecting the circuit board. The pressing assembly 34 is provided on the bearing box 32 and used for pressing the circuit board on the bearing plate 33. When the circuit board is detected, the circuit board is placed on the bearing plate 33 and the electrically connecting points on the circuit board are aligned with the probes, and then the pressing assembly 34 is started to press the circuit board, so that the circuit board keeps in contact with the probes.

[0071] Optionally, a profiled groove is provided on the bearing plate 33, and the circuit board is placed in the profiled groove to be positioned by the profiled groove, so that the circuit board can keep aligned with the probes on the bearing plate.

[0072] Specifically, the side wall of the bearing box 32 is provided with the aforementioned avoiding hole 3211, and the locking block 232 is inserted into the bearing box 32 through the avoiding hole 3211 and can abut against the inner wall of the bearing box 32, so as to realize the position locking of the bearing box 32 in the first direction by the locking assembly 23.

[0073] ​In some embodiments, the carrying box 32 comprises a box body 321 and a box cover 322, the upper end of the box body 321 is provided with an opening, and the box cover 322 is hingedly covered on the opening to facilitate the dismounting and mounting of the device in the carrying box 32.

[0074] Optionally, the box body 321 is provided with a self-locking pin 35, and the box cover 322 is provided with a connecting lug on the side facing the inside of the box body 321, and the connecting lug is provided with a pin hole, when the box cover 322 is covered on the box body 321, the self-locking pin 35 is inserted into the pin hole to lock the box cover 322.

[0075] Further, the box body 321 is also provided with a safety device 36, which is used to limit the automatic covering of the box cover 322 on the box body 321 to prevent injury to workers and improve safety. Specifically, the safety device 36 comprises a knob 361 and a baffle 362, the knob 361 is rotationally arranged on the box body 321, and one end of the knob 361 extends into the inside of the box body 321 and is connected with the baffle 362. In the natural state, the baffle 362 is vertical, and the top end is higher than the box body 321 to block the box cover 322 and prevent the box cover 322 from being closed. When the box cover 322 needs to be closed, the knob 361 is rotated to make the baffle 362 rotate to a horizontal state and be lower than the opening of the box body 321, so that the box cover 322 can be smoothly closed.

[0076] In some embodiments, the pressing assembly 34 comprises two groups of mounting blocks 341 and pressing plates 342, the two groups of mounting blocks 341 are arranged on the carrying plate 33 in a spaced manner, and the area for carrying the circuit board is defined between the two groups of mounting blocks 341. The two sides of the pressing plate 342 are movably arranged on the mounting blocks 341, and the pressing plate 342 can be moved to press the circuit board on the carrying plate 33 or avoid the pressing plate 342.

[0077] Further, the pressing assembly 34 further comprises a bracket 343, the bracket 343 comprises two connecting parts 3431 and a handle part 3432, the two connecting parts 3431 are arranged respectively on the pressing plate 342 and the corresponding mounting block 341, the handle part 3432 connects the two connecting parts 3431, and a gap is reserved between the handle part 3432 and the pressing plate 342. The mounting block 341 is provided with a locking member, when the bracket 343 is moved to the position where the pressing plate 342 presses the circuit board, the locking member locks the bracket 343. The locking member can be a locking pin, which has basically the same structure and working principle as the self-locking pin 35, and will not be described here. By arranging the bracket 343, the handle part 3432 is operated to drive the pressing plate 342 to move relative to the carrying plate 33 through the connecting part 3431.

[0078] Specifically, the connecting part 3431 extends along the length direction of the side of the pressing plate 342 to which it is connected, one end of the connecting part 3431 is fixedly connected to the pressing plate 342, and the other end of the connecting part 3431 is provided with a first guide column 34311 toward the side of the corresponding mounting block 341, and the corresponding mounting block 341 is provided with a first sliding groove 3411, and the first guide column 34311 can slide along the first sliding groove 3411. The other end of the connecting part 3431 is also provided with a second sliding groove 34312, and the pressing plate 342 is correspondingly provided with a second guide column 3421, and the second guide column 3421 can slide in the second sliding groove 34312. The other end of the connecting part 3431 is also provided with a third sliding groove 34313, and the mounting block 341 is correspondingly provided with a third guide column 3412, and the third guide column 3412 can slide in the third sliding groove 34313. Wherein, in the state that the pressing plate 342 presses the circuit board, the first guide column 34311, the second guide column 3421 and the third guide column 3412 are arranged in a triangular shape, and when the pressing plate 342 is turned away from the circuit board, the pressing plate 342 is kept away from the circuit board by the sliding of the first guide column 34311 in the first sliding groove 3411, the second guide column 3421 in the second sliding groove 34312 and the third guide column 3412 in the third sliding groove 34313.

[0079] Of course, in other embodiments, the pressing assembly 34 can also adopt the mode of cooperation of a pressing plate and a gas cylinder, and the pressing plate is driven by the gas cylinder to approach or move away from the bearing plate 33, so as to realize the pressing or separation of the circuit board on the bearing plate 33. The specific structure of the pressing assembly 34 is not limited here.

[0080] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0081] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A circuit board testing device, characterized in that, The circuit board testing device includes: A chassis, wherein a detection host is installed inside the chassis; A testing platform is disposed on the outer side of the chassis. The testing platform includes a first docking part, and the testing host is electrically connected to the first docking part. A testing fixture is disposed on the testing platform for supporting and positioning the circuit board to be tested; the testing fixture includes a second docking part, which is configured to mate with the first docking part, and the second docking part can electrically connect to the positioned circuit board.

2. The circuit board testing device according to claim 1, characterized in that, Multiple testing fixtures are provided, and the multiple testing fixtures can be interchangeably connected to the testing platform; Each of the aforementioned testing fixtures is adapted to a specific size of the aforementioned circuit board.

3. The circuit board testing device according to claim 1, characterized in that, The detection platform includes: A support platform is used to support the testing fixture; A guide portion is disposed on the support platform along a first direction, and the detection fixture can move along the guide portion to a preset position; At the preset position, the first docking part and the second docking part are engaged.

4. The circuit board testing device according to claim 3, characterized in that, The detection platform also includes: A locking component is configured to lock the detection fixture at the preset position.

5. The circuit board testing device according to claim 4, characterized in that, The locking component includes: Locking drive components; A locking block is connected to the driving end of the locking drive member, and the locking block can rotate under the drive of the locking drive member; The testing fixture is provided with a corresponding clearance hole. When the testing fixture moves to the preset position, the locking block is inserted into the clearance hole, and when the locking block rotates, it at least partially avoids the clearance hole to abut against the testing fixture.

6. The circuit board testing device according to claim 5, characterized in that, The testing fixture includes a carrier box, and the side wall of the carrier box is provided with the clearance hole. The locking block is inserted into the carrier box through the clearance hole and can abut against the inner wall of the carrier box.

7. The circuit board testing device according to any one of claims 1-6, characterized in that, The testing fixture includes: A carrier box, disposed on the testing platform, is used to accommodate the wires connecting the second mating part and the circuit board; A carrier plate is disposed in the carrier box for supporting the circuit board. The carrier plate is provided with probes for electrically connecting to the circuit board. A pressing component is disposed on the carrier box and is used to press against the circuit board on the carrier plate.

8. The circuit board testing device according to claim 7, characterized in that, The pressure-absorbing component includes: Two sets of mounting blocks are spaced apart on the support plate, and the area between the two sets of mounting blocks defines the area that supports the circuit board. A pressure plate is provided, with its two sides movably disposed on the mounting block. The pressure plate can move relative to the mounting block to press against the circuit board on the support plate or avoid the pressure plate.

9. The circuit board testing device according to claim 8, characterized in that, The pressure-absorbing component also includes: The bracket includes a connecting part and a handle part. There are two connecting parts, each of which is connected to a pressure plate and a corresponding mounting block. The handle part connects the two connecting parts, and a gap is reserved between the handle part and the pressure plate. The mounting block is equipped with a locking element. When the bracket moves to the position where the pressure plate presses against the circuit board, the locking element locks the bracket.

10. The circuit board testing device according to claim 9, characterized in that, The connecting part extends along the length of the side of the pressure plate to which it is connected. One end of the connecting part is fixedly connected to the pressure plate. The other end of the connecting part is provided with a first guide post facing the side of the corresponding mounting block. A first sliding groove is provided on the corresponding mounting block. The first guide post can slide along the first sliding groove. The other end of the connecting part is also provided with a second sliding groove, and a second guide post is correspondingly provided on the pressure plate, the second guide post being able to slide in the second sliding groove; The other end of the connecting part is also provided with a third sliding groove, and a third guide post is correspondingly provided on the mounting block, and the third guide post can slide in the third sliding groove; When the pressure plate is pressing against the circuit board, the first guide post, the second guide post, and the third guide post are arranged in a triangle. When the pressure plate rotates from pressing against the circuit board to avoiding the circuit board, the pressure plate is kept away from the circuit board by the sliding of the first guide post in the first groove, the second guide post in the second groove, and the third guide post in the third groove.

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