CN217112449U

CN217112449U - PCB high accuracy test jig

Info

Publication number: CN217112449U
Application number: CN202220559416.7U
Authority: CN
Inventors: 李文庭
Original assignee: Shenzhen Gaomai Electronics Co ltd
Current assignee: Shenzhen Gaomai Electronics Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-08-02
Anticipated expiration: 2032-03-15

Abstract

The utility model relates to a PCB high accuracy test jig, which belongs to the technical field of PCB test and solves the problems that in the prior PCB test technology, the position error of a PCB is one of the factors influencing the test, the test result of a light person is incorrect, and the probe and the PCB are damaged by a heavy person; this scheme includes the testboard, the mount pad, the driving source and the trigger component of setting between testboard and mount pad, the bottom of mount pad is provided with the probe, the trigger component is used for moving down the in-process that makes probe and PCB contact at the mount pad, carry out the position self-align detection to the PCB of placing on the testboard, the up end of testboard is provided with positioning area and guide rail, the trigger component includes two sets of trigger part, two sets of trigger part are located positioning area respectively along testboard width direction's both sides and two sets of trigger part are symmetrical arrangement about the positioning area.

Description

PCB high accuracy test jig

Technical Field

The utility model relates to a PCB tests technical field, concretely relates to PCB high accuracy test jig.

Background

In the PCB test process, generally put PCB on test platform through technical means such as manual work or arm, the rethread orders about probe and PCB contact, accomplish alignment between test equipment and the PCB, test system in the rethread test equipment and the cooperation of probe, accomplish the test of PCB, in-process, if the position of PCB is put not just, there is the deviation, then order about the in-process of probe and PCB contact, the light person leads to the contact position of probe and PCB to have the mistake, lead to the test result incorrect, the position that the heavy person can lead to the probe is located the circuit components and parts top on the PCB, lead to bumping between probe and the circuit components and parts, produce the damage, therefore, the utility model provides a PCB high accuracy test jig.

SUMMERY OF THE UTILITY MODEL

For solving the problem mentioned in the above-mentioned background, the utility model provides a PCB high accuracy test jig.

In order to achieve the technical purpose, the utility model adopts the following technical scheme.

A PCB high-precision test frame comprises a test board, a mounting seat positioned above the test board, a driving source for driving the mounting seat to move along the vertical direction and a triggering member arranged between the test board and the mounting seat;

the bottom of mount pad is provided with the probe that is used for testing PCB, and the trigger component is used for moving down at the mount pad and makes the in-process of probe and PCB contact, carries out the self-align detection in position to the PCB of placing on the testboard.

Further, the driving source comprises a motor and a guide rod, a screw rod is vertically arranged at the output end of the motor, and the guide rod is vertically arranged;

the mounting seat is in threaded connection with the screw rod, and the mounting seat is in sliding connection with the guide rod.

Furthermore, the upper end face of the test board is provided with a positioning area and a guide rail, the guide direction of the guide rail is parallel to the length direction of the test board, and the positioning area is used for placing the PCB.

Furthermore, the trigger component includes two sets of trigger parts, and two sets of trigger parts are located the both sides of locating area along testboard width direction respectively and two sets of trigger parts are symmetrical arrangement about the locating area.

Furthermore, the trigger part comprises a push plate which is in sliding connection with the guide rail, a sliding sleeve is arranged on one side of the push plate, which faces the positioning area, the extending direction of the sliding sleeve is parallel to the length direction of the test board, a sliding rod is arranged in the sliding sleeve in a sliding manner, a positioning frame is arranged on one end of the sliding rod, which faces the positioning area, and a spring a which is positioned between the positioning frame and the push plate is sleeved outside the sliding sleeve;

a convex plate positioned on one side of the push plate, which is far away from the positioning area, is also arranged on the test board, and a spring b is fixedly arranged between the convex plate and the push plate;

the positioning frame is U-shaped.

Furthermore, the positioning frame comprises a limiting rod, the extending direction of the limiting rod is parallel to the width direction of the test board, two ends of the limiting rod are respectively provided with a guide rod, the guide rods are positioned on one side, facing the positioning area, of the limiting rod, and the extending direction of the guide rods is parallel to the length direction of the test board;

the opposite surfaces of the two groups of guide rods are composed of guide inclined surfaces and limiting planes, the guide inclined surfaces are located on one side, facing the positioning area, of the limiting planes, the distance between the guide inclined surfaces in the two groups of guide rods is increased in the length direction of the test board and in the direction of the push plate pointing to the positioning frame, the distance between the limiting planes in the two groups of guide rods is equal to the size of the PCB in the width direction of the test board, and the length of the guide rods is equal to one half of the size of the PCB in the length direction of the test board.

Furthermore, the trigger part also comprises a trigger plate which is obliquely arranged, the bottom of the trigger plate is fixed with the push plate, and the top end of the trigger plate is positioned above the mounting seat;

the distance between the trigger plates in the two groups of trigger components decreases from bottom to top along the vertical direction, and the installation seat is positioned between the trigger plates in the two groups of trigger components;

the upper end face of the mounting seat is provided with a linkage rod, and the linkage rod is in contact with the upper inclined face of the trigger plate.

Further, the inclination angle of the trigger plate is 45 degrees.

Compared with the prior art, the utility model, beneficial effect lies in:

in this scheme, move down the in-process that makes probe and PCB contact at the mount pad, through the cooperation of two sets of trigger parts, carry out position self-align detection to the PCB of placing on the testboard to prevent that the PCB position from putting and have the error, light person influences subsequent testing process, and heavy person can lead to bumping between PCB and the probe, produces the damage.

In the scheme, the inclination angle of the trigger plate is 45 degrees, so that the movement of the trigger plate and the movement of the mounting seat are not interfered with each other, and the ordered and non-turbulent progress of a PCB test process is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of the present invention in an initial state;

FIG. 2 is a schematic structural view of the present invention when the probe contacts the PCB;

FIG. 3 is a schematic structural diagram of a testing table and a triggering member;

FIG. 4 is a schematic structural view of the trigger member;

fig. 5 is a schematic structural diagram of the driving source and the mounting seat.

The reference numbers in the drawings are:

1. a test bench; 101. a guide rail; 2. a mounting seat; 201. a linkage rod; 3. a drive source; 301. a motor; 302. a screw rod; 303. a guide bar; 4. a trigger member; 401. a trigger plate; 402. pushing a plate; 403. a positioning frame; 404. a guide ramp; 405. a limiting plane; 406. a sliding sleeve; 407. a slide bar; 408. a spring a; 409. a spring b; 5. and (3) a probe.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1 to 5, a PCB high precision test jig includes a test table 1, a mounting base 2 located above the test table 1, a driving source 3 for driving the mounting base 2 to move in a vertical direction, and a triggering member 4 disposed between the test table 1 and the mounting base 2.

The bottom of the mounting base 2 is provided with a probe 5 for testing the PCB.

Trigger component 4 is used for moving down the in-process that makes probe 5 and PCB contact at mount pad 2, carries out self-align detection to the PCB of placing on testboard 1 to prevent that the PCB position from putting and have the error, light person influences subsequent test process, and heavy person can lead to colliding between PCB and the probe 5, produces the damage.

As shown in fig. 5, the driving source 3 includes a motor 301 and a guide rod 303, wherein an output end of the motor 301 is vertically provided with a screw 302, and the guide rod 303 is vertically arranged.

The mounting base 2 is in threaded connection with the screw rod 302 and is also in sliding connection with the guide rod 303, when the motor 301 runs to drive the screw rod 302 to rotate, the mounting base 2 is driven to move along the vertical direction, and when the mounting base 2 vertically moves downwards, the probe 5 can be in contact with a PCB, so that the PCB can be tested by the probe 5.

As shown in fig. 3, the upper end surface of the test platform 1 is provided with a positioning area and a guide rail 101, the guiding direction of the guide rail 101 is parallel to the length direction of the test platform 1, and the positioning area is used for placing a PCB.

As shown in fig. 3 to 4, the triggering member 4 includes two sets of triggering components, the two sets of triggering components are respectively located at two sides of the positioning area along the width direction of the test bench 1, and the two sets of triggering components are symmetrically arranged with respect to the positioning area.

As shown in fig. 4, the triggering component includes a push plate 402 slidably connected to the guide rail 101, a sliding sleeve 406 is disposed on a side of the push plate 402 facing the positioning area, an extending direction of the sliding sleeve 406 is parallel to a length direction of the test bench 1, a sliding rod 407 is slidably disposed in the sliding sleeve 406, a positioning frame 403 is disposed on an end of the sliding rod 407 facing the positioning area, and a spring a408 is sleeved outside the sliding sleeve 406 and located between the positioning frame 403 and the push plate 402.

The test bench 1 is further provided with a convex plate located on one side of the push plate 402 departing from the positioning area, and a spring b409 is fixedly arranged between the convex plate and the push plate 402.

Locating rack 403 is the U-shaped shape, and is concrete, and locating rack 403 includes that the extending direction is on a parallel with the gag lever post of testboard 1 width direction, and the both ends of gag lever post all are provided with the guide bar, and the guide bar is located the gag lever post and is on a parallel with the length direction of testboard 1 towards one side in the locating area and the extending direction of guide bar.

The opposite surfaces of the two groups of guide rods are composed of guide inclined surfaces 404 and limit planes 405, wherein the guide inclined surfaces 404 are positioned on one side of the limit planes 405 facing the positioning area, the distance between the guide inclined surfaces 404 in the two groups of guide rods increases progressively along the length direction of the test bench 1 and the direction of the push plate 402 pointing to the positioning frame 403, the distance between the limit planes 405 in the two groups of guide rods is equal to the dimension of the PCB along the width direction of the test bench 1, and the length of the guide rods is equal to one half of the dimension of the PCB along the length direction of the test bench 1.

As shown in fig. 3-4, the trigger component further includes a trigger plate 401 disposed obliquely, the bottom of the trigger plate 401 is fixed to the push plate 402, and the top end is located above the mounting base 2.

The distance between the trigger plates 401 in the two sets of trigger components decreases progressively from bottom to top along the vertical direction, and the mounting base 2 is located between the trigger plates 401 in the two sets of trigger components.

As shown in fig. 1-2 and 5, the upper end surface of the mounting base 2 is provided with a linkage 201, and the linkage 201 is in contact with the upper inclined surface of the trigger plate 401.

The utility model discloses a theory of operation:

the method comprises the following steps: placing a PCB to be tested in a positioning area of the test bench 1;

step two: the driving source 3 operates to drive the mounting seat 2 to vertically move downwards, and in the process of vertically moving downwards of the mounting seat 2:

firstly, the linkage rod 201 moves down together with the mounting seat 2 and is matched with the upper inclined plane of the trigger plate 401 to drive the trigger plate 401 and the push plate 402 to move close to the positioning area along the guiding direction of the guide rail 101, the spring b409 is in a stretching state, the push plate 402 moves to drive the positioning frames 403 to synchronously move through the spring a408, when the positioning frames 403 in the two groups of trigger components are contacted with each other, because the distance between the limiting planes 405 in the two groups of guide rods is equal to the dimension of the PCB along the width direction of the test board 1, and the length of the guide rod is equal to one half of the dimension of the PCB along the length direction of the test board 1, the area between the two groups of positioning frames 403 is matched with the PCB, that is, the area formed by the two groups of positioning frames 403 is overlapped with the positioning area, the position of the PCB is detected through the two groups of positioning frames 403, and self-positioning processing is carried out, so as to ensure the accurate position of the PCB;

next, the mount 2 is further lowered, and at this time, the trigger plate 401 and the push plate 402 are further lowered, and when the positioning frame 403 is not moved, the moving displacement of the push plate 402 is converted into the amount of compression of the spring a408 until the probe 5 comes into contact with the PCB.

Step three: after the PCB test is finished, the motor 301 runs in the reverse direction to move the mounting base 2 upward to reset, and simultaneously, the spring a408 and the spring b409 release the elastic force to reset the trigger component.

In the preferred embodiment, the inclination angle of the trigger plate 401 is 45 degrees, which means that when the mounting base 2 moves by the displacement a, the 45-degree inclination enables the trigger plate 401 to move by the displacement a in the same direction of the guide rail 101, that is, the distance between the trigger plate 401 and the mounting base 2 is kept constant, so that the downward movement of the mounting base 2 and the movement of the trigger plate 401 do not interfere with each other, and the orderly and non-turbulent performance of the test process is facilitated.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.

Claims

1. A PCB high-precision test frame comprises a test board (1), a mounting seat (2) positioned above the test board (1) and a driving source (3) used for driving the mounting seat (2) to move along the vertical direction, and is characterized by further comprising a trigger member (4) arranged between the test board (1) and the mounting seat (2);

the bottom of mount pad (2) is provided with probe (5) that are used for testing to PCB, and trigger component (4) are used for moving down at mount pad (2) and make probe (5) and the in-process of PCB contact, carry out the self-align detection in position to the PCB of placing on testboard (1).

2. The PCB high-precision test jig is characterized in that the driving source (3) comprises a motor (301) and a guide rod (303), the output end of the motor (301) is vertically provided with a screw rod (302), and the guide rod (303) is vertically arranged;

the mounting seat (2) is in threaded connection with the screw rod (302), and the mounting seat (2) is in sliding connection with the guide rod (303).

3. The PCB high-precision test rack according to claim 1, characterized in that the upper end surface of the test platform (1) is provided with a positioning area and a guide rail (101), the guide direction of the guide rail (101) is parallel to the length direction of the test platform (1), and the positioning area is used for placing the PCB.

4. A PCB high-precision test jig according to claim 3, characterized in that the trigger member (4) comprises two sets of trigger parts, the two sets of trigger parts are respectively arranged at two sides of the positioning area along the width direction of the test bench (1) and the two sets of trigger parts are symmetrically arranged about the positioning area.

5. The PCB high-precision test jig is characterized in that the trigger part comprises a push plate (402) connected with the guide rail (101) in a sliding mode, a sliding sleeve (406) is arranged on one side, facing the positioning area, of the push plate (402), the extending direction of the sliding sleeve (406) is parallel to the length direction of the test table (1), a sliding rod (407) is arranged in the sliding sleeve (406) in a sliding mode, a positioning frame (403) is arranged at one end, facing the positioning area, of the sliding rod (407), and a spring a (408) located between the positioning frame (403) and the push plate (402) is sleeved on the outer portion of the sliding sleeve (406);

a convex plate positioned on one side of the push plate (402) departing from the positioning area is further arranged on the test board (1), and a spring b (409) is fixedly arranged between the convex plate and the push plate (402);

the positioning frame (403) is U-shaped.

6. The PCB high-precision test rack according to claim 5, characterized in that the positioning rack (403) comprises a limiting rod with an extending direction parallel to the width direction of the test board (1), two ends of the limiting rod are provided with guide rods, the guide rods are positioned on one side of the limiting rod facing the positioning area, and the extending direction of the guide rods is parallel to the length direction of the test board (1);

the opposite surfaces of the two groups of guide rods are composed of guide inclined surfaces (404) and limiting planes (405), the guide inclined surfaces (404) are located on one side, facing the positioning area, of the limiting planes (405), the distance between the guide inclined surfaces (404) in the two groups of guide rods is increased progressively along the length direction of the test board (1) and the direction of a push plate (402) pointing to the positioning frame (403), the distance between the limiting planes (405) in the two groups of guide rods is equal to the size of a PCB in the width direction of the test board (1), and the length of each guide rod is equal to one half of the size of the PCB in the length direction of the test board (1).

7. The PCB high accuracy test jig of claim 6, characterized in that, the trigger part further comprises a trigger plate (401) which is arranged in an inclined way, the bottom of the trigger plate (401) is fixed with the push plate (402), and the top end is positioned above the mounting seat (2);

the distance between the trigger plates (401) in the two groups of trigger components decreases progressively from bottom to top along the vertical direction, and the mounting seat (2) is positioned between the trigger plates (401) in the two groups of trigger components;

the upper end face of the mounting seat (2) is provided with a linkage rod (201), and the linkage rod (201) is in contact with the upper inclined face of the trigger plate (401).

8. A PCB high accuracy test jig according to claim 7, characterized in that the inclination angle of the trigger plate (401) is 45 degrees.