Test fixture and test equipment

Abstract

The utility model discloses a test fixture and test equipment. The test fixture comprises a base; the testing part is arranged in the base; the pressing part comprises a pressing piece and a cover plate, the pressing piece is arranged on the cover plate through an elastic supporting assembly, an opening is formed in the cover plate, the pressing piece is arranged above the opening, and the cover plate is hinged to the base; the PCB is pressed by the pressing piece arranged on the cover plate, so that a lifting mechanism does not need to be additionally arranged on the test equipment, only the pushing piece with the preset height needs to be arranged on the test equipment, and then the purpose of pressing the pressing piece can be achieved by pushing the test jig provided by the embodiment into the position below the pushing piece; therefore, the cost of equipment can be reduced, and the operation is simpler; and secondly, after thrust is applied to the pressing piece, the elastic supporting assembly can apply reverse thrust to the pressing piece, equivalently, a buffering effect is provided for downward pressing of the pressing piece, and the situation that the pressing piece is rapidly pressed downwards to impact the PCB, and consequently the PCB is damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the field of PCB testing equipment, in particular to a testing fixture. Background Art

[0002] PCB, the full name of which is Printed Circuit Board, is a support for electronic components and a provider of circuit connections for electronic components. It is made using electronic printing technology, and its main function is to provide connections between electronic components. It is a support for electronic components and also a connection carrier for electronic component circuits.

[0003] PCB test fixtures are equipment or tools specifically used for PCB (printed circuit board) testing. They are used to simulate the actual working environment of the circuit board and test the circuit board in terms of function, performance, reliability, etc. The design and manufacture of these test fixtures need to comply with relevant test standards and requirements to ensure the accuracy and reliability of the test.

[0004] Traditional testing equipment used to test the connectivity of PCB boards includes a jig and a pressing plate. A test panel is set in the jig. The PCB board is first placed on the test panel of the test section, and then the PCB board is pressed by the pressing plate to connect it with the probes on the test panel, so as to perform a connectivity test. Traditional testing equipment requires the pressing plate to be installed on a lifting mechanism, and then the lifting mechanism is used to move the pressing plate to press the PCB board downward. Pushing the pressing plate by the lifting mechanism will increase the equipment cost and make the operation complicated. It may also cause test failure and damage to the test panel or PCB board due to poor control of the pushing force. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art that pushing the pressing plate through the lifting mechanism will increase equipment cost and make the operation complicated, and may also cause test failure and damage to the test panel or PCB board due to poor control of the pushing force.

[0006] The utility model provides a test fixture in a first aspect, comprising:

[0007] Base;

[0008] A testing part, installed in the base;

[0009] The pressing part comprises a pressing piece and a cover plate. The pressing piece is mounted on the cover plate through an elastic support component. The cover plate is provided with an opening. The pressing piece is arranged above the opening. The cover plate is hinged to the base.

[0010] Optionally, the elastic support assembly includes:

[0011] A support seat, mounted on the cover plate;

[0012] A first elastic member is mounted on the support seat;

[0013] A connecting piece has one end connected to the first elastic piece and the other end connected to the pressing piece.

[0014] Optionally, the pressing member is provided with a first limiting member and a second limiting member, the cover plate is provided with a through hole, one end of the first limiting member is provided with a resistance portion with an area larger than the through hole, the other end of the first limiting member passes through the through hole to connect to the pressing member, and the second limiting member is arranged at the bottom of the pressing member.

[0015] Optionally, the testing unit includes:

[0016] A backing plate is detachably mounted in the base;

[0017] The needle plate is detachably mounted on the backing plate, and a test probe is arranged on the surface of the needle plate.

[0018] Optionally, an elastic positioning member is provided on the pad, and the elastic positioning member includes a mounting seat, a positioning column and a second elastic member, the second elastic member is installed in the mounting seat, and the positioning column is connected to the second elastic member.

[0019] Optionally, a limiting guide plate is provided on the pad.

[0020] Optionally, a nitrogen spring is provided between the base and the cover plate, one end of the nitrogen spring is rotatably connected to the base, and the other end is rotatably connected to the cover plate, and a buffer is also provided on the base.

[0021] Optionally, a buckle is provided on the base, and a locking piece matching the buckle is provided on the cover.

[0022] The second aspect of the utility model provides a testing device, comprising a frame and the testing fixture of the first aspect, wherein the frame is provided with a pushing member, the pushing member is provided with a roller, and the pressing member is provided with a wedge block.

[0023] Optionally, the frame is provided with a guide rail and a positioning pin, and the bottom of the base is provided with a slide groove cooperating with the guide rail and a positioning hole cooperating with the positioning pin.

[0024] The beneficial effects of the utility model are as follows: the cover plate is opened on the base, the PCB board to be tested is placed in the base, and the cover plate is closed on the base. After closing, the lower part of the opening of the cover plate faces the test part, and a thrust is applied to the pressing piece, and the pressing piece moves to the lower part of the opening and finally contacts the PCB board so that the PCB board contacts the test part. The pressing piece is installed on the cover plate through an elastic support component; firstly, the PCB board is pressed by the pressing piece installed on the cover plate, and there is no need to set a lifting mechanism on the test equipment. It is only necessary to set a push piece of a predetermined height on the test equipment, and then the test fixture provided by this embodiment is pushed under the push piece to achieve the purpose of pressing the pressing piece downward, which can reduce the cost of the equipment and is simpler to operate; secondly, after the thrust is applied to the pressing piece, the elastic support component will apply a reverse thrust to the pressing piece, which is equivalent to providing a buffering effect for the pressing piece to press downward, so as to avoid the pressing piece from pressing downward quickly to impact the PCB board and causing damage to the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 is a schematic diagram of the structure of some embodiments;

[0027] Figure 2 is a schematic diagram of the structure from another angle in some embodiments;

[0028] Figure 3 is an exploded view of a pressing portion in some embodiments;

[0029] Figure 4 is an exploded view of a test portion in some embodiments;

[0030] Figure 5 It is a partial structural schematic diagram of a testing device.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. base; 2. test part; 3. pressing part; 101. nitrogen spring; 102. buffer; 103. buckle; 104. slide groove; 201. pad; 202. needle plate; 203. test probe; 204. support column; 205. elastic positioning member; 205a. mounting seat; 205b. positioning column; 205c. second elastic member; 206. limiting guide plate; 301. pressing member; 301a. pressing column; 302. cover plate; 303. elastic support assembly; 303a. support seat; 303b. first elastic member; 303c. connecting member; 304. first limiting member; 305. second limiting member; 306. interference part; 307. wedge block; 401. push member; 402. roller; 403. positioning pin. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0033] This embodiment provides a test fixture, including: a base 1; a test part 2, which is installed in the base 1; a pressing part 3, including a pressing piece 301 and a cover plate 302, wherein the pressing piece 301 is installed on the cover plate 302 through an elastic support component 303, the cover plate 302 is provided with an opening, the pressing piece 301 is arranged above the opening, and the cover plate 302 is hinged to the base 1. Among them, the test part 2 is used to connect with the PCB board to prepare for subsequent tests, and the pressing part 3 is used to press the PCB board to connect it with the test panel.

[0034] During implementation, the cover 302 is opened on the base 1, the PCB to be tested is placed in the base 1, and the cover 302 is closed on the base 1. After closing, the lower opening of the cover 302 faces the test part 2, and a thrust is applied to the pressing member 301. The pressing member 301 moves downward to the lower opening and finally contacts the PCB so that the PCB contacts the test part 2. The pressing member 301 is mounted on the cover 302 through the elastic support assembly 303. First, by pressing the PCB with the pressing member 301 mounted on the cover 302, there is no need to set a lifting mechanism on the test equipment. Only a push member 401 of a predetermined height needs to be set on the test equipment. Then, the test fixture provided in this embodiment can be pushed under the push piece 401 to achieve the purpose of pressing the pressing piece 301 downward, which can reduce the cost of the equipment and make the operation simpler; secondly, after the pushing force is applied to the pressing piece 301, the elastic support component 303 will apply a reverse thrust to the pressing piece 301, which is equivalent to providing a buffering effect for the pressing of the pressing piece 301, so as to avoid the pressing piece 301 from quickly pressing down and impacting the PCB board to cause damage to the PCB board; specifically, the pressing piece 301 is a plate-like structure, and a plurality of pressing columns 301a are provided at the bottom of the pressing piece 301, and the cover plate 302 and the base 1 are hinged by hinges. In some cases, it can also be connected by hinges.

[0035] In some embodiments, the elastic support assembly 303 includes: a support seat 303a, mounted on the cover plate 302; a first elastic member 303b, mounted on the support seat 303a; and a connecting member 303c, one end of which is connected to the first elastic member 303b and the other end of which is connected to the pressing member 301.

[0036] During implementation, the support seat 303a is mounted on the cover plate 302, and then the first elastic member 303b is mounted on the support seat 303a, and then the connecting member 303c is mounted on the first elastic member 303b, and the pressing member 301 is connected to the first elastic member 303b. After applying a thrust to the pressing member 301, the connecting member 303c moves toward the first elastic member 303b to squeeze the first elastic member 303b, and the squeezed first elastic member 303b applies a reverse thrust to the connecting member 303c, thereby pressing the pressing member 301. The first elastic member 303b pushes the connecting member 303c when the pressing member 301 is pressed downward to provide a buffering effect, thereby preventing the PCB from being damaged due to excessive downward pressure of the pressing member 301. Meanwhile, when the pressing member 301 is no longer pressed, the first elastic member 303b pushes the connecting member 303c, and the connecting member 303c pushes the pressing member 301 back to its original position, thereby completing the reset of the pressing member 301. In this way, the pressing member 301 can be reset, and since no pressure is applied to the PCB, the PCB can be easily taken out, so that there is no need to manually lift the pressing member 301 to take out the PCB, thereby saving manpower.

[0037] Specifically, the support seat 303a is fixed to the cover plate 302 by screws, a linear bearing is provided in the support seat 303a, the first elastic member 303b is a spring, the connecting member 303c is a connecting column, the connecting column is arranged in the linear bearing, and the connecting column is connected to the spring in the linear bearing. The pressing member 301 is a square plate structure. In order to maintain the stability of the pressing member 301 on the cover plate 302, four elastic supporting members are arranged between the pressing member 301 and the cover plate 302. The four elastic supporting members are respectively arranged at the bottom of the four corners corresponding to the pressing member 301, so that the pressing member 301 maintains its stability. In some cases, a larger number of elastic supporting members may also be provided, and the number of elastic supporting members is not limited in the present utility model.

[0038] In some embodiments, the pressing member 301 is provided with a first limiting member 304 and a second limiting member 305, the cover plate 302 is provided with a through hole, one end of the first limiting member 304 is provided with a resistance portion 306 with an area larger than the through hole, the other end of the first limiting member 304 is connected to the pressing member 301 through the through hole, and the second limiting member 305 is arranged at the bottom of the pressing member 301.

[0039] During implementation, first, the end of the first limiting member 304 without the interference portion 306 is passed through the through hole on the cover plate 302. The area of ​​the interference portion 306 is larger than the through hole, so the interference portion 306 will interfere with one side of the cover plate 302; the second limiting plate is directly installed on the bottom of the pressing member 301; since the interference portion 306 of the first limiting member 304 cannot pass through the through hole on the cover plate 302 and the first limiting portion is connected to the pressing member 301, the first limiting member 304 can limit the pressing member 301 from moving too far away from the cover plate 302; the second limiting member 305 is set at the bottom of the pressing member 301. When the pressing member 301 is pushed toward the cover plate 302 and reaches a predetermined position, the second limiting member 305 will interfere with the surface of the cover plate 302, limiting the pressing member 301 from being pressed down excessively, so that the pressing member 301 maintains a fixed downward push distance, which can prevent the PCB board from being excessively squeezed.

[0040] Specifically, the first limiting member 304 is a limiting column, and the abutting portion 306 is a round head. The limiting column passes through the through hole on the cover plate 302, and the round head abuts against one side of the cover plate 302. In this embodiment, two through holes are provided on the cover plate 302, and two first limiting members 304 are also provided, each limiting member passes through a through hole, and the pressing member 301 is also a plate-shaped decoupling, and the positions of the two through holes correspond to the bottoms of the two opposite sides of the pressing member 301, respectively, so that the pressing member 301 can maintain balance when being limited; the second limiting member 305 is a block structure, and the number of the second limiting members 305 is also two, which are respectively arranged at the bottoms of both sides of the pressing member 301, which can also keep the pressing member 301 balanced when being limited. It should be noted that in the present utility model, there is no limitation on the number of the first limiting members 304 and the second limiting members 305, and a suitable number can be selected according to actual conditions.

[0041] In some embodiments, the testing part 2 includes: a pad 201 detachably mounted in the base 1 ; a needle plate 202 detachably mounted on the pad 201 , and a testing probe 203 is disposed on the surface of the needle plate 202 .

[0042] During implementation, the pad 201 is installed in the base 1, and the test probe 203 is installed on the needle plate 202 according to the specifications of the PCB board to be tested, and the needle plate 202 with the test probe 203 is installed on the pad 201. The pad 201 and the needle plate 202 with the probe together constitute a test board, and the test probe 203 is used to connect with the PCB board; the pad 201 is detachably installed in the base 1, which is convenient for replacing the pad 201 when encountering PCB boards of different specifications. When a PCB board with little difference is needed, since the needle plate 202 is detachably installed on the pad 201, only the needle plate 202 can be replaced to adapt to the PCB board with little difference. It can be seen that the pad 201 or the needle plate 202 can be replaced according to different test situations.

[0043] Specifically, the bottom of the pad 201 is provided with a plurality of support columns 204, and the support columns 204 are provided with screw holes. The base 1 is provided with holes corresponding to the positions of the support columns 204, and screws can be screwed through the holes of the base 1 into the screw holes of the support, so that the pad 201 is fixed. The support columns 204 can also play the role of supporting the pad 201. The needle plate 202 is a long strip of needle plates 202, and there are a plurality of needle plates 202. The needle plates 202 are arranged side by side on the surface of the pad 201, and each needle plate 202 is fixed on the pad 201 by screws. Each needle plate 202 is provided with a hole, and the hole of the needle plate 202 is used to install the test probe 203.

[0044] In some embodiments, the pad 201 is provided with an elastic positioning member 205, the elastic positioning member 205 includes a mounting seat 205a, a positioning column 205b and a second elastic member 205c, the second elastic member 205c is installed in the mounting seat 205a, and the positioning column 205b is connected to the second elastic member 205c. The elastic positioning member 205 is used for positioning the PCB board.

[0045] During implementation, the mounting seat 205a is installed on the pad 201, and then the second elastic member 205c is installed in the mounting seat 205a, and then the positioning column 205b is installed on the second elastic member 205c; when the PCB board is placed in the base 1, a tray is used to place the PCB board, and the tray supports the PCB board. A positioning hole is set at the bottom of the tray, and the positioning hole at the bottom of the tray is aligned with the positioning column 205b on the pad 201 and placed. The positioning column 205b is inserted into the positioning hole to position the tray. After positioning, the PCB board on the tray is supported by the positioning column 205b and does not contact the test part 2 in advance. When a thrust is applied to the pressing member 301 to push the PCB board, the tray on which the PCB board is placed will press down the positioning column 205b, and the positioning column 205b will press down the second elastic member 205c, so that the elastic member is compressed and the PCB board moves downward to contact the test part 2. When the test is completed and the pressing member 301 no longer pushes the PCB board, the positioning column 205b will be pushed up by the second elastic member 205c, and the positioning column 205b will lift up the tray again, so that the PCB board in the tray does not contact the test part 2. In addition to positioning the tray on which the PCB board is placed, the elastic positioning member 205 also provides the function of supporting and resetting the tray.

[0046] Specifically, a linear bearing is provided in the mounting seat 205a, the positioning column 205b is installed in the linear bearing, the second elastic member 205c is a spring, the second elastic member 205c is connected to the positioning column 205b in the linear bearing, and the positioning column 205b can move in the linear bearing.

[0047] In some embodiments, a limiting guide plate 206 is provided on the pad 201 .

[0048] During implementation, the PCB board is usually placed into the base 1 using a tray, and the limiting guide plate 206 on the pad 201 can limit the outward movement of the tray and play a guiding role for placing the tray.

[0049] Specifically, the limiting guide plate 206 is an L-shaped plate and is installed on the side of the pad 201.

[0050] In some embodiments, a nitrogen spring 101 is provided between the base 1 and the cover plate 302 , one end of the nitrogen spring 101 is rotatably connected to the base 1 , and the other end is rotatably connected to the cover plate 302 . A buffer 102 is also provided on the base 1 .

[0051] During implementation, a nitrogen spring 101 is installed between the base 1 and the cover 302. When the cover 302 is closed on the base 1, the nitrogen spring 101 can provide a buffering effect for the closing, thereby preventing the cover 302 from directly and quickly closing on the base 1 and causing damage. When the cover 302 is lifted, the nitrogen spring 101 will support the cover 302 to keep the cover 302 in an open state, and will provide a thrust to the cover 302 when opening the cover 302, thereby making it easier to open the cover 302 and saving manpower. In the process of closing the cover 302 on the base 1, the buffer 102 on the base 1 can also play a buffering role for the closing.

[0052] Specifically, a rotating shaft is provided in the base 1, and a rotating shaft is also provided on the cover plate 302. One end of the nitrogen spring 101 is rotatably connected to the rotating shaft in the base 1, and the other end is rotatably connected to the rotating shaft on the cover plate 302, so that the nitrogen spring 101 can rotate and change position with the opening and closing of the cover plate 302 to adapt to the opening and closing of the cover plate 302.

[0053] In some embodiments, a buckle 103 is disposed on the base 1 , and a locking member (not shown in the figure) matching the buckle 103 is disposed on the cover plate 302 .

[0054] During implementation, when the cover plate 302 is covered on the base 1 , the cover plate 302 and the base 1 can be kept in the covered state by fastening the locking member through the pull buckle 103 .

[0055] Specifically, a handle is provided on the cover plate 302, and the cover plate 302 can be opened and closed by the handle.

[0056] This embodiment provides a testing device, including a frame (not shown) and the testing fixture in the above embodiment, the frame is provided with a pushing member 401, the pushing member 401 is provided with a roller 402, and the pressing member 301 is provided with a wedge block 307.

[0057] During implementation, the PCB board is placed in the base 1 of the test fixture, and then the cover plate 302 is covered, and the test fixture is slowly pushed into the position of the rack push piece 401, and the roller 402 on the push piece 401 will abut against the wedge block 307 on the pressing piece 301. As the test fixture is gradually pushed in, the rollers 402 on the push piece 401 approach the highest point of the wedge block 307. When the pressing piece 301 reaches the highest point, it is pushed to the optimal downward pressing distance to complete the pressing of the PCB board. The push piece 401 pushes the pressing piece 301 without using a practical lifting mechanism, which reduces the equipment cost and is simple to operate.

[0058] In some embodiments, a guide rail (not shown in the figure) and a positioning pin 403 are provided on the frame, and a slide groove 104 cooperating with the guide rail and a positioning hole cooperating with the positioning pin 403 are provided at the bottom of the base 1 .

[0059] During implementation, when the test fixture needs to be pushed into the rack, the slide groove 104 on the base 1 and the guide rail on the rack can be used to push it into the rack. When it is pushed to the predetermined position, the positioning pin 403 is used to pass through the positioning hole on the base 1 to position the fixture. Similarly, when taking out the fixture, the positioning pin 403 can be contacted to position the base 1 first, and then the test fixture can be pulled out on the guide rail.

[0060] Specifically, the positioning pin 403 is an indexing pin.

[0061] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A test fixture, characterized in that: include: Base; A testing unit, installed in the base; The pressing part comprises a pressing piece and a cover plate. The pressing piece is mounted on the cover plate through an elastic support component. The cover plate is provided with an opening. The pressing piece is arranged above the opening. The cover plate is hinged to the base.

2. The test fixture according to claim 1, characterized in that: The elastic support assembly comprises: A support seat, mounted on the cover plate; A first elastic member is mounted on the support seat; A connecting piece has one end connected to the first elastic piece and the other end connected to the pressing piece.

3. The test fixture according to claim 1, characterized in that: The pressing member is provided with a first limiting member and a second limiting member, the cover plate is provided with a through hole, one end of the first limiting member is provided with a resistance portion with an area larger than the through hole, the other end of the first limiting member passes through the through hole to connect with the pressing member, and the second limiting member is arranged at the bottom of the pressing member.

4. The test fixture according to claim 1, characterized in that: The testing unit comprises: A backing plate is detachably mounted in the base; The needle plate is detachably mounted on the backing plate, and a test probe is arranged on the surface of the needle plate.

5. The test fixture according to claim 4, characterized in that: The pad is provided with an elastic positioning member, which includes a mounting seat, a positioning column and a second elastic member. The second elastic member is installed in the mounting seat, and the positioning column is connected to the second elastic member.

6. The test fixture according to claim 4, characterized in that: The pad is provided with a limiting guide plate.

7. The test fixture according to claim 1, characterized in that: A nitrogen spring is arranged between the base and the cover plate, one end of the nitrogen spring is rotatably connected to the base, and the other end is rotatably connected to the cover plate. A buffer is also arranged on the base.

8. The test fixture according to claim 1, characterized in that: A drawstring is provided on the base, and a locking piece matching the drawstring is provided on the cover.

9. A testing device, characterized in that: It comprises a frame and the test fixture according to any one of claims 1 to 8, wherein the frame is provided with a pushing piece, the pushing piece is provided with a roller, and the pressing piece is provided with a wedge block.

10. The testing device according to claim 9, characterized in that The frame is provided with guide rails and positioning pins, and the bottom of the base is provided with a slide groove matched with the guide rail and a positioning hole matched with the positioning pin.

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