CN220231914U - PCB board testing arrangement - Google Patents

Abstract

A PCB testing device comprises a testing box, a testing structure, a replacing structure, a pressing structure, a limiting structure, a mounting structure and a PCB body; the performance of the PCB body is tested through the test structure, the test structure is quickly replaced through the replacement structure, the operation is quick and simple, and the flexibility of the device is improved; the pressing plate is quickly replaced through the limiting structure, so that downward pressure is applied to the PCB bodies with different sizes, and the using effect of the device is improved; the mounting structure comprises the pressing rod, the position of the pressing rod is conveniently changed according to the position of the electric element on the PCB body, the pressing rod is prevented from crushing the electric element, and meanwhile, the pressing rods with different lengths are conveniently changed, so that the stress of the PCB body is more uniform, and the applicability and the use effect of the device are improved.

Description

PCB board testing arrangement

Technical Field

The utility model relates to the technical field of PCB testing devices, in particular to a PCB testing device.

Background

Printed circuit boards (PrintedCircuitBoard, PCB), also known as printed circuit boards, for short, circuit boards, are important electronic components. The insulating board is used as base material, cut into certain size, and has at least one conducting pattern with holes (such as element, fastening hole, metallized hole, etc.) to replace the chassis of electronic components and to realize interconnection. Since such boards are manufactured using electronic printing, so-called "printed" circuit boards, the PCB board is manufactured and then tested for performance, requiring the use of PCB board test tools.

However, the needle plate on the traditional PCB testing jig is fixed on the testing box through screws, when the needle plate needs to be replaced, one screw on the testing box needs to be screwed off, after the needle plate is replaced, the screws need to be installed again, and the needle plate is replaced more complicated; the pressure plate and the pressure arm on the PCB testing jig are generally integrally arranged, so that the pressure is not conveniently applied to the PCBs tested in different sizes, and the use effect is poor; inconvenient position of the pressure post on the pressure plate of adjusting according to the electrical component distribution on the PCB board, inconvenient length of adjusting the pressure bar simultaneously, the contact effect of PCB board and probe is relatively poor, leads to the test effect poor.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides a PCB testing device.

The technical scheme adopted for solving the technical problems is as follows: the PCB testing device comprises a testing box, a testing structure, a replacing structure and a pressing structure, wherein the testing structure is connected to the testing box, the testing structure comprises a needle plate and a mounting groove, the testing box is detachably connected with the needle plate, and a PCB body is mounted in the mounting groove;

the replacing structure comprises a pressing strip, the pressing strip is connected to the test box in a sliding manner, two sliding blocks with trapezoid cross sections are abutted against the two ends of the pressing strip, the sliding blocks are connected with the test box in a sliding manner, clamping strips are fixedly connected to the sliding blocks and connected with the test box in a sliding manner, the clamping strips are clamped with clamping grooves, and the clamping grooves are formed in a needle plate; the needle plate is provided with four fixing sleeves, positioning columns are connected inside the fixing sleeves in a sliding manner, the four positioning columns are fixedly connected to a carrier plate, the carrier plate is provided with a plurality of positioning holes, the needle plate is fixedly connected with a plurality of positioning rods, the positioning rods are connected inside the positioning holes in a sliding manner, and the carrier plate is provided with mounting grooves; the inside sliding connection of fixed cover has the sliding closure, fixedly connected with first spring between sliding closure and the faller, contradict between reference column and the sliding closure.

Specifically, sliding connection has two first guide bars on the card strip, first guide bar fixed connection is in the inside of test box, the outside cover of first guide bar is equipped with the second spring, the both ends of second spring are fixed connection respectively on test box and card strip.

Specifically, the bottom fixedly connected with two gag levers, sliding connection between gag lever levers and the test box, respectively fixedly connected with one of both sides of layering and the anti-disengaging block of sliding connection between the test box.

Specifically, push down the structure and include the mounting bracket, two mounting brackets of fixedly connected with on the testing cassette, through bolt fixedly connected with crossbeam on the mounting bracket, the center department fixedly connected with pressure arm of crossbeam, the flexible end fixedly connected with connecting plate of pressure arm, can dismantle on the connecting plate and be connected with the clamp plate, be equipped with mounting structure on the clamp plate.

Specifically, two guide posts are fixedly connected to the test box, and the connecting plate is in sliding connection with the guide posts.

Specifically, be equipped with limit structure on the connecting plate, limit structure includes the spout, be equipped with the cross-section for trapezoidal spout on the connecting plate, sliding connection between clamp plate and the spout, sliding connection has the ejector pad on the connecting plate, fixedly connected with and connecting plate sliding connection's connecting strip on the ejector pad, fixedly connected with and connecting plate between sliding connection's spacing on the connecting strip, the block between spacing and the spacing groove, be equipped with the spacing groove on the clamp plate.

Specifically, two second guide rods are fixedly connected to the limiting strips, the second guide rods are connected with the connecting plates in a sliding mode, third springs are sleeved outside the second guide rods, and two ends of each third spring are fixedly connected to the connecting plates and the limiting strips respectively.

Specifically, mounting structure includes the mounting hole, rectangular array is equipped with a plurality of mounting hole on the clamp plate, the inside sliding connection of mounting hole has the depression bar, sliding connection has the connecting block that two symmetries set up on the depression bar, sliding connection's stopper between fixedly connected with and the depression bar on the connecting block, the block is equipped with the rubber pad with the spacing hole on the clamp plate between the block.

Specifically, two sliding connection has the gib block that the cross-section is H shape on the connecting block, the outside cover of gib block is equipped with the fourth spring, the both ends fixed connection of fourth spring is on two connecting blocks.

The beneficial effects of the utility model are as follows:

(1) According to the PCB testing device, the testing structure is arranged on the testing box, the replacement structure is arranged on the testing box, so that the performance of the PCB body can be conveniently tested through the testing structure, the testing structure can be conveniently and quickly replaced through the replacement structure, different PCB bodies can be detected through replacing different testing structures, the operation is rapid and simple, and the flexibility of the device is improved.

(2) According to the PCB testing device, the pressing structure is arranged on the testing box, the limiting structure is arranged on the pressing structure, downward pressure is applied to the PCB body through the pressing structure, so that the PCB body is fully contacted with the probe, the effect of testing the PCB body by the needle plate is better, the pressing structure comprises the pressing plate, the pressing plate is quickly replaced through the limiting structure, the pressing plates with different sizes are convenient to replace, the pressing plates with different sizes are further suitable for applying downward pressure to the PCB body with different sizes, and the using effect of the device is improved.

(3) According to the PCB testing device, the mounting structure is arranged on the pressing plate and comprises the pressing rod, the pressing rod is convenient to replace according to the position of the electrical element on the PCB body, the pressing rod is prevented from crushing the electrical element, meanwhile, the pressing rods with different lengths are convenient to replace, the stress of the PCB body is even, and the applicability and the use effect of the device are improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic overall structure of a preferred embodiment of a PCB testing apparatus according to the present utility model;

FIG. 2 is a schematic diagram of a connection structure between a carrier plate and a positioning column according to the present utility model;

FIG. 3 is an enlarged schematic view of the portion A shown in FIG. 1;

FIG. 4 is a schematic view of the structure of the pressure arm of the present utility model;

FIG. 5 is a schematic diagram of a connection structure of the connection block and the stopper according to the present utility model;

FIG. 6 is a schematic diagram of a connection structure between a compression bar and a rubber pad according to the present utility model;

FIG. 7 is a schematic diagram of a connection structure between a pressing plate and a limiting structure according to the present utility model;

fig. 8 is a schematic diagram of a connection structure between a carrier board and a PCB board body according to the present utility model;

FIG. 9 is an enlarged schematic view of the B-section structure shown in FIG. 8;

FIG. 10 is a schematic view of the connection structure of the pressing bar and the sliding block of the present utility model.

In the figure: 1. a test cartridge; 2. a test structure; 201. a needle plate; 202. a fixed sleeve; 203. a first spring; 204. a sliding cover; 205. positioning columns; 206. a carrier plate; 207. a positioning rod; 208. positioning holes; 209. a mounting groove; 3. replacing the structure; 301. pressing strips; 302. a limit rod; 303. an anti-falling block; 304. a slide block; 305. clamping strips; 306. a clamping groove; 307. a first guide bar; 308. a second spring; 4. a pressing structure; 401. a mounting frame; 402. a cross beam; 403. a pressure arm; 404. a connecting plate; 405. a pressing plate; 406. a guide post; 5. a limit structure; 501. a chute; 502. a pushing block; 503. a connecting strip; 504. a limit bar; 505. a limit groove; 506. a second guide bar; 507. a third spring; 6. a mounting structure; 601. a mounting hole; 602. a compression bar; 603. a connecting block; 604. a limiting block; 605. a limiting hole; 606. a guide bar; 607. a fourth spring; 608. a rubber pad; 7. a PCB body.

Detailed Description

The utility model is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

As shown in fig. 1 to 10, the PCB board testing device according to the present utility model includes a testing box 1, a testing structure 2 connected to the testing box 1, a replacing structure 3, and a pressing structure 4, wherein the testing structure 2 includes a needle plate 201 and the mounting groove 209, the testing box 1 is detachably connected with the needle plate 201, and a PCB board body 7 is mounted in the mounting groove 209;

the replacing structure 3 comprises a pressing strip 301, the pressing strip 301 is connected to the test box 1 in a sliding manner, two sliding blocks 304 with trapezoid cross sections are abutted against the two ends of the pressing strip 301, the sliding blocks 304 are connected with the test box 1 in a sliding manner, clamping strips 305 are fixedly connected to the sliding blocks 304 and are connected with the test box 1 in a sliding manner, the clamping strips 305 are clamped with clamping grooves 306, and the clamping grooves 306 are formed in the needle plate 201; four fixing sleeves 202 are arranged on the needle plate 201, positioning columns 205 are slidably connected inside the fixing sleeves 202, the four positioning columns 205 are fixedly connected to a carrier plate 206, a plurality of positioning holes 208 are formed in the carrier plate 206, a plurality of positioning rods 207 are fixedly connected to the needle plate 201, the positioning rods 207 are slidably connected inside the positioning holes 208, and mounting grooves 209 are formed in the carrier plate 206; a sliding cover 204 is slidably connected inside the fixed sleeve 202, a first spring 203 is fixedly connected between the sliding cover 204 and the needle plate 201, and the positioning column 205 is abutted against the sliding cover 204; the clamping strip 305 is slidably connected with two first guide rods 307, the first guide rods 307 are fixedly connected to the inside of the test box 1, a second spring 308 is sleeved outside the first guide rods 307, and two ends of the second spring 308 are respectively and fixedly connected to the test box 1 and the clamping strip 305; the bottom end of the pressing strip 301 is fixedly connected with two limiting rods 302, the limiting rods 302 are in sliding connection with the test box 1, and two sides of the pressing strip 301 are respectively fixedly connected with an anti-falling block 303 in sliding connection with the test box 1; namely: when different needle boards 201 need to be replaced, the pressing strips 301 on the test box 1 can be pressed, the pressing strips 301 slide downwards to drive the sliding blocks 304 at two ends to slide back, the sliding blocks 304 slide back to drive the clamping strips 305 to slide back, the clamping strips 305 do not clamp the clamping grooves 306 on the needle boards 201 any more, the second springs 308 are compressed, the arrangement of the first guide rods 307 improves the stability of the clamping strips 305 in sliding, the needle boards 201 on the test box 1 can be taken down, the different needle boards 201 are replaced, the different needle boards 201 need to be replaced together with the different matched carrier boards 206, the corresponding needle boards 201 are placed in the grooves on the test box 1, then the pressing strips 301 are loosened, the second springs 308 are reset to drive the clamping strips 305 to clamp the clamping grooves 306 on the new needle boards 201 any more, meanwhile, the sliding blocks 304 are driven to reset, the pressing strips 301 are driven to reset, the setting of the limit rod 302 improves the stability of the press bar 301 during sliding, and the setting of the anti-drop block 303 prevents the press bar 301 from slipping when being reset, when the PCB body 7 needs to be detected, the PCB body 7 is placed in the mounting groove 209 on the carrier plate 206, then the positioning column 205 on the carrier plate 206 is aligned with the fixing sleeve 202 on the needle plate 201, the positioning rod 207 on the needle plate 201 slides in the positioning hole 208 on the carrier plate 206, the probe on the needle plate 201 correspondingly inserts into the pinhole on the carrier plate 206, when the PCB body 7 is tested, the PCB body 7 is pressed down, the carrier plate 206 is driven to descend, the carrier plate 206 slides on the positioning rod 207, at the same time, the probe on the needle plate 201 contacts with the PCB body 7, the positioning column 205 slides in the fixing sleeve 202, the sliding cover 204 is driven to slide down, the sliding cover 204 drives the first spring 203 to compress, the first spring 203 plays a role of buffering, meanwhile, the probe on the needle plate 201 is guaranteed to be fully contacted with the PCB body 7, the testing effect is improved, after the testing is completed, the first spring 203 is reset, the sliding cover 204 and the positioning column 205 are driven to reset, and then the carrier plate 206 and the PCB body 7 on the carrier plate 206 are driven to reset, so that the PCB body 7 is not contacted with the probe any more.

Specifically, the pressing structure 4 includes a mounting frame 401, two mounting frames 401 are fixedly connected to the test box 1, a cross beam 402 is fixedly connected to the mounting frames 401 through bolts, a pressure arm 403 is fixedly connected to the center of the cross beam 402, a connecting plate 404 is fixedly connected to the telescopic end of the pressure arm 403, a pressing plate 405 is detachably connected to the connecting plate 404, and a mounting structure 6 is arranged on the pressing plate 405; two guide posts 406 are fixedly connected to the test box 1, and the connecting plate 404 is in sliding connection with the guide posts 406; namely: when the PCB body 7 needs to be tested, the handle arranged on the pressure arm 403 on the cross beam 402 is used for driving the pressure arm 403 to stretch, the pressure arm 403 stretches out and draws back, the connecting plate 404 is driven to slide downwards, the pressure plate 405 is driven to descend, the mounting structure 6 on the pressure plate 405 is further abutted against the surface of the PCB body 7, the PCB body 7 is driven to slide downwards, the pressure arm 403 contracts, the connecting plate 404 and the pressure plate 405 are driven to reset, and the guide post 406 is arranged, so that the connecting plate 404 and the pressure plate 405 slide more stably.

Specifically, the connection board 404 is provided with a limit structure 5, the limit structure 5 includes a chute 501, the connection board 404 is provided with a chute 501 with a trapezoidal section, the pressure plate 405 is slidably connected with the chute 501, the connection board 404 is slidably connected with a push block 502, the push block 502 is fixedly connected with a connection bar 503 slidably connected with the connection board 404, the connection bar 503 is fixedly connected with a limit bar 504 slidably connected with the connection board 404, the limit bar 504 is engaged with the limit groove 505, and the pressure plate 405 is provided with the limit groove 505; two second guide rods 506 are fixedly connected to the limit strips 504, the second guide rods 506 are in sliding connection with the connecting plates 404, third springs 507 are sleeved outside the second guide rods 506, and two ends of each third spring 507 are fixedly connected to the connecting plates 404 and the limit strips 504 respectively; namely: when the pressing plate 405 needs to be replaced, the pushing block 502 on the connecting plate 404 is pushed, the pushing block 502 slides to drive the connecting strip 503 to slide, the connecting strip 503 slides to drive the limiting strip 504 to slide, the limiting strip 504 is not clamped with the limiting groove 505 on the pressing plate 405, at the moment, the pressing plate 405 can slide out of the sliding groove 501 on the connecting plate 404, when the new pressing plate 405 is replaced, the trapezoid protruding block on the pressing plate 405 slides into the sliding groove 501 on the connecting plate 404, then the pushing block 502 is loosened, the limiting strip 504 can be driven to be clamped into the limiting groove 505 on the new pressing plate 405 again under the reset action of the third spring 507, the pressing plate 405 is replaced, the second guide rod 506 is arranged, the third spring 507 is prevented from deflecting, and meanwhile the sliding stability of the limiting strip 504 is improved.

Specifically, the mounting structure 6 includes a mounting hole 601, a rectangular array on the pressing plate 405 is provided with a plurality of mounting holes 601, a pressing rod 602 is slidably connected in the mounting holes 601, two symmetrically arranged connecting blocks 603 are slidably connected on the pressing rod 602, a limiting block 604 slidably connected with the pressing rod 602 is fixedly connected on the connecting blocks 603, the limiting block 604 is clamped with a limiting hole 605 on the pressing plate 405, and a rubber pad 608 is arranged at the bottom end of the pressing rod 602; the two connecting blocks 603 are connected with guide strips 606 with H-shaped sections in a sliding manner, fourth springs 607 are sleeved outside the guide strips 606, and two ends of each fourth spring 607 are fixedly connected to the two connecting blocks 603; namely: when the pressure bar 602 needs to be disassembled, the connecting block 603 on the pressure bar 602 can be pinched by hands, the two connecting blocks 603 slide inwards to drive the two limiting blocks 604 to retract into the pressure bar 602, and then the two limiting blocks are not clamped with the limiting holes 605 on the pressure plate 405, the pressure bar 602 can be pulled out of the mounting holes 601 at the moment, when the pressure bar 602 with different lengths needs to be replaced and the inserting position of the pressure bar 602 is adjusted, the connecting blocks 603 can be pinched to enable the limiting blocks 604 to retract into the pressure bar 602, then the pressure bar 602 is inserted into the target mounting holes 601, then the pressure bar 602 is rotated, when the limiting blocks 604 meet the position of the limiting holes 605 on the pressure plate 405, the fourth springs 607 reset can drive the connecting blocks 603 and the limiting blocks 604 to be unfolded, the limiting blocks 604 are clamped into the limiting holes 605 on the pressure plate 405, the pressure bar 602 is replaced, the guide strips 606 are arranged to avoid the fourth springs 607 from deflecting, meanwhile, the two connecting blocks 603 slide more stably, the setting of the rubber pad 608 protects the PCB body 7, and electrical elements on the PCB body 7 are prevented from being damaged when the pressure bar 602 is in contact with the PCB body 7.

When the utility model is used, firstly, when different needle plates 201 are required to be replaced, the pressing strips 301 on the test box 1 can be pressed, the pressing strips 301 slide downwards to drive the sliding blocks 304 at two ends to slide back, the sliding blocks 304 slide back to drive the clamping strips 305 to slide back, the clamping strips 305 are not clamped with the clamping grooves 306 on the needle plates 201 any more, the second springs 308 are compressed, the first guide rods 307 improve the stability of the sliding of the clamping strips 305, the needle plates 201 on the test box 1 can be taken down, the different needle plates 201 are replaced, the different needle plates 201 are required to be replaced together with the different supporting carrier plates 206, the corresponding needle plates 201 are placed in the grooves on the test box 1, then the pressing strips 301 are loosened, the second springs 308 are reset to drive the clamping strips 305 to be clamped into the clamping grooves 306 on the new needle plates 201 again, meanwhile, the sliding blocks 304 are driven to reset, the sliding blocks 304 are reset to drive the pressing strips 301 to reset, the setting of the limit rod 302 improves the stability of the press bar 301 during sliding, and the setting of the anti-drop block 303 prevents the press bar 301 from slipping when being reset, when the PCB body 7 needs to be detected, the PCB body 7 is placed in the mounting groove 209 on the carrier plate 206, then the positioning column 205 on the carrier plate 206 is aligned with the fixing sleeve 202 on the needle plate 201, the positioning rod 207 on the needle plate 201 slides in the positioning hole 208 on the carrier plate 206, the probe on the needle plate 201 correspondingly inserts into the pinhole on the carrier plate 206, when the PCB body 7 is tested, the PCB body 7 is pressed down, the carrier plate 206 is driven to descend, the carrier plate 206 slides on the positioning rod 207, at the same time, the probe on the needle plate 201 contacts with the PCB body 7, the positioning column 205 slides in the fixing sleeve 202, the sliding cover 204 is driven to slide down, the sliding cover 204 drives the first spring 203 to compress, the first spring 203 plays a role of buffering, meanwhile, the probe on the needle plate 201 is ensured to be fully contacted with the PCB body 7, the testing effect is improved, after the testing is finished, the first spring 203 is reset to drive the sliding cover 204 and the positioning column 205 to reset, and then the carrier plate 206 and the PCB body 7 on the carrier plate 206 are driven to reset, so that the PCB body 7 is not contacted with the probe any more;

then, when the PCB body 7 needs to be tested, the handle arranged on the pressure arm 403 on the cross beam 402 is rotated to drive the pressure arm 403 to stretch, the pressure arm 403 drives the connecting plate 404 to slide downwards when being extended, and then drives the pressing plate 405 to descend, the mounting structure 6 on the pressing plate 405 further abuts against the surface of the PCB body 7, and then drives the PCB body 7 to slide downwards, the pressure arm 403 is contracted to drive the connecting plate 404 to reset with the pressing plate 405, the guide post 406 is arranged, so that the connecting plate 404 and the pressing plate 405 slide more stably, when the pressing plate 405 needs to be replaced, the push block 502 on the connecting plate 404 is pushed, the push block 502 slides to drive the connecting strip 503 to slide, the connecting strip 503 slides to drive the limiting strip 504 to slide, the limiting strip 504 is not clamped with the limiting groove 505 on the pressing plate 405, at this moment, the trapezoidal protruding blocks on the pressing plate 405 can slide into the sliding grooves 501 on the connecting plate 404 when being replaced with new pressing plate 405, then the push block 502 is loosened, the limiting strip 504 can be driven to be clamped again into the new pressing plate 405 under the reset action of the third spring 507, and the second guide bar 506 is replaced, and the third guide spring 507 is prevented from sliding off the second guide bar 507;

finally, when the pressure bar 602 needs to be disassembled, the connecting block 603 on the pressure bar 602 can be pinched by hands, the two connecting blocks 603 slide inwards to drive the two limiting blocks 604 to retract into the pressure bar 602, and then the two limiting blocks are not clamped with the limiting holes 605 on the pressure plate 405, the pressure bar 602 can be pulled out from the mounting holes 601 at the moment, when the pressure bars 602 with different lengths need to be replaced and the inserting positions of the pressure bars 602 are adjusted, the connecting blocks 603 can be pinched to enable the limiting blocks 604 to retract into the pressure bars 602, then the pressure bars 602 are inserted into the target mounting holes 601, then the pressure bars 602 are rotated, when the limiting blocks 604 meet the positions of the limiting holes 605 on the pressure plate 405, the fourth springs 607 reset to drive the connecting blocks 603 and the limiting blocks 604 to be unfolded, the limiting holes 605 on the pressure plate 405 are replaced, the guide bars 606 are set to avoid the fourth springs 607 from deviating, meanwhile, the two connecting blocks 603 slide more stably, the setting of the rubber pads 608 protects the PCB body 7, and electrical elements on the PCB body 7 are prevented from being damaged when the pressure bars 602 are abutted against the PCB body 7.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (10)

1. The PCB testing device is characterized by comprising a testing box (1), a testing structure (2), a replacing structure (3) and a pressing structure (4) which are connected to the testing box (1), wherein the testing structure (2) comprises a needle plate (201) and a mounting groove (209), the needle plate (201) is detachably connected to the testing box (1), and a PCB body (7) is mounted in the mounting groove (209);

the replacement structure (3) comprises a pressing strip (301), the pressing strip (301) is connected to the test box (1) in a sliding mode, two sliding blocks (304) with trapezoid cross sections are arranged at two ends of the pressing strip (301) in a abutting mode, the sliding blocks (304) are connected with the test box (1) in a sliding mode, clamping strips (305) are connected to the sliding blocks (304) in a sliding mode and are connected with the test box (1) in a sliding mode, clamping between the clamping strips (305) and clamping grooves (306) is achieved, and the clamping grooves (306) are formed in the needle plate (201).

2. The PCB testing apparatus of claim 1, wherein: four fixing sleeves (202) are arranged on the needle plate (201), positioning columns (205) are connected inside the fixing sleeves (202) in a sliding mode, the four positioning columns (205) are fixedly connected to a carrier plate (206), a plurality of positioning holes (208) are formed in the carrier plate (206), a plurality of positioning rods (207) are fixedly connected to the needle plate (201), the positioning rods (207) are connected inside the positioning holes (208) in a sliding mode, and mounting grooves (209) are formed in the carrier plate (206); the inside sliding connection of fixed cover (202) has sliding closure (204), fixedly connected with first spring (203) between sliding closure (204) and faller (201), contradict between reference column (205) and sliding closure (204).

3. The PCB testing apparatus of claim 1, wherein: the clamping strip (305) is connected with two first guide rods (307) in a sliding mode, the first guide rods (307) are fixedly connected to the inside of the test box (1), second springs (308) are sleeved outside the first guide rods (307), and two ends of each second spring (308) are respectively and fixedly connected to the test box (1) and the clamping strip (305).

4. The PCB testing apparatus of claim 1, wherein: the bottom end of the pressing strip (301) is fixedly connected with two limiting rods (302), the limiting rods (302) are in sliding connection with the test box (1), and two sides of the pressing strip (301) are fixedly connected with an anti-falling block (303) in sliding connection with the test box (1).

5. The PCB testing apparatus of claim 1, wherein: the pushing structure (4) comprises a mounting frame (401), two mounting frames (401) are fixedly connected to the test box (1), a cross beam (402) is fixedly connected to the mounting frames (401) through bolts, a pressure arm (403) is fixedly connected to the center of the cross beam (402), a connecting plate (404) is fixedly connected to the telescopic end of the pressure arm (403), a pressing plate (405) is detachably connected to the connecting plate (404), and a mounting structure (6) is arranged on the pressing plate (405).

6. The PCB testing apparatus of claim 5, wherein: two guide posts (406) are fixedly connected to the test box (1), and the connecting plate (404) is in sliding connection with the guide posts (406).

7. The PCB testing apparatus of claim 5, wherein: be equipped with limit structure (5) on connecting plate (404), limit structure (5) include spout (501), be equipped with on connecting plate (404) cross-section for trapezoidal spout (501), sliding connection between clamp plate (405) and spout (501), sliding connection has ejector pad (502) on connecting plate (404), fixedly connected with and connecting plate (404) sliding connection's connecting strip (503) on ejector pad (502), fixedly connected with and connecting plate (404) between sliding connection's spacing (504) on connecting strip (503), block between spacing (504) and spacing groove (505), be equipped with spacing groove (505) on clamp plate (405).

8. The PCB testing apparatus of claim 7, wherein: two second guide rods (506) are fixedly connected to the limiting strips (504), the second guide rods (506) are connected with the connecting plates (404) in a sliding mode, third springs (507) are sleeved outside the second guide rods (506), and two ends of each third spring (507) are fixedly connected to the connecting plates (404) and the limiting strips (504) respectively.

9. The PCB testing apparatus of claim 5, wherein: mounting structure (6) are including mounting hole (601), rectangular array is equipped with a plurality of mounting hole (601) on clamp plate (405), the inside sliding connection of mounting hole (601) has depression bar (602), sliding connection has connecting block (603) that two symmetries set up on depression bar (602), fixedly connected with stopper (604) of sliding connection between depression bar (602) on connecting block (603), the block is blocked between spacing hole (605) on stopper (604) and clamp plate (405), the bottom of depression bar (602) is equipped with rubber pad (608).

10. The PCB testing apparatus of claim 9, wherein: the two connecting blocks (603) are connected with guide strips (606) with H-shaped sections in a sliding mode, fourth springs (607) are sleeved outside the guide strips (606), and two ends of each fourth spring (607) are fixedly connected to the two connecting blocks (603).