CN213957552U

CN213957552U - Impedance change test fixture of four-wire low-resistance PCB

Info

Publication number: CN213957552U
Application number: CN202023047949.7U
Authority: CN
Inventors: 阚宏林
Original assignee: Kunyi Electronic Shenzhen Co Ltd
Current assignee: Kunyi Electronic Shenzhen Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-08-13
Anticipated expiration: 2030-12-17

Abstract

The utility model discloses an impedance change test fixture of four-wire low resistance PCB, including the testboard, the spout has been seted up to the upper surface of testboard, the top sliding connection of spout has the removal frame, the upper end fixed mounting who removes the frame has the diaphragm, the fixed slot has been seted up on the surface of diaphragm, the top of fixed slot is provided with the fixed block, the middle part fixed mounting of the bottom surface of fixed block has the connecting rod, the middle part and the fixed slot activity of connecting rod are pegged graft, the bottom fixed mounting of connecting rod has the test contact. The utility model discloses an impedance change test fixture of four-wire low resistance PCB, test contact pass through connecting rod and fixed block fixed connection, and the bottom of fixed block is passed through compression spring and is connected with the connecting plate, and the surface and the fixed slot activity of connecting rod are pegged graft like this, and fixed screw has been seted up to the surface of connecting rod, and accessible fixing nut fixes a plurality of test contacts on the diaphragm, can install and dismantle test contact fast like this.

Description

Impedance change test fixture of four-wire low-resistance PCB

Technical Field

The utility model relates to a test fixture field, in particular to impedance change test fixture field of four-wire low resistance PCB.

Background

PCB (printed Circuit board), which is called Printed Circuit Board (PCB) and is also called Printed Circuit Board (PCB), is an important electronic component, a support body of an electronic component, and a carrier for electrical connection of the electronic component.

Present PCB impedance change test fixture has some problems, present PCB is because the model is different, so there is the difference in the size of PCB and the quantity of joint, present PCB's impedance change test fixture can't change test contact how much fast, lead to testing to the PCB of a model only specially like this, so practicality and commonality are relatively poor, when testing PCB simultaneously, because can't fix PCB, so easily lead to testing inaccurate, in view of this, we provide an impedance change test fixture of four-wire low resistance PCB.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an impedance change test fixture of four-wire low resistance PCB can effectively solve the problem in the background art.

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

the utility model provides an impedance change test fixture of four-wire low resistance PCB, includes the testboard, the spout has been seted up to the upper surface of testboard, the top sliding connection of spout has the removal frame, the upper end fixed mounting who removes the frame has the diaphragm, the fixed slot has been seted up on the surface of diaphragm, the top of fixed slot is provided with the fixed block, the middle part fixed mounting of the bottom surface of fixed block has the connecting rod, the middle part and the fixed slot activity of connecting rod are pegged graft, the bottom fixed mounting of connecting rod has the test contact.

The utility model discloses a further improvement lies in, fixed mounting has compression spring around the bottom of fixed block and be located the connecting rod, compression spring's bottom fixed mounting has the connecting plate, the middle part and the connecting rod sliding connection of connecting plate.

The utility model discloses a further improvement lies in, the bottom of connecting plate and the epitaxial contact of diaphragm, fixed thread has been seted up to the surface of connecting rod.

The utility model discloses a further improvement lies in, fixed thread's surface threaded connection has fixing nut, fixing nut is located the below of diaphragm, test contact passes through connecting rod and fixed block fixed connection like this, and the bottom of fixed block is passed through compression spring and is connected with the connecting plate, the surface and the fixed slot activity of connecting rod are pegged graft like this, fixed thread has been seted up to the surface of connecting rod, accessible fixing nut fixes a plurality of test contacts on the diaphragm, can install and dismantle test contact like this fast, and can the quick adjustment distance between a plurality of test contacts, can carry out the rapid survey to multi-thread PCB's impedance change like this, better practicality and commonality have.

The utility model discloses a further improvement lies in, the bottom fixed mounting who removes the frame has the slider, the surface and the spout sliding connection of slider, the standing groove has been seted up at the upper surface middle part of testboard, the interior edge both sides of standing groove are seted up flutedly.

The utility model discloses a further improvement lies in, the interior bottom fixed mounting of recess has fixed spring, fixed spring's the one end fixed mounting who keeps away from the recess has splint, one side fixed mounting who keeps away from fixed spring of splint has flexible pad, and splint and flexible pad can carry out flexible fixed to the PCB board of equidimension not under recess inside fixed spring's promotion like this, prevent that PCB board from taking place to rock in the testing process and leading to the test failure, and the slider that removes the frame bottom slides in the inside of spout, carry out the short-term test to the different joint in position of PCB board, have better practicality and the accuracy of test.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the test contact passes through connecting rod and fixed block fixed connection, and the bottom of fixed block is passed through compression spring and is connected with the connecting plate, the surface and the fixed slot activity of connecting rod are pegged graft like this, fixed screw has been seted up to the surface of connecting rod, accessible fixing nut fixes a plurality of test contacts on the diaphragm, can install and dismantle test contact fast like this, and the distance between a plurality of test contacts of quick adjustment, can carry out the rapid survey to multi-thread PCB's impedance change like this, better practicality and commonality have.

2. Splint and flexible pad can carry out the flexible fixation to the PCB board of equidimension not under the promotion of the inside fixed spring of recess, prevent that PCB board from taking place to rock in the testing process and leading to the test failure, and the slider that removes the frame bottom slides in the inside of spout, carry out the rapid survey to the joint of the position difference of PCB board, have better practicality and the accuracy of test.

Drawings

Fig. 1 is the utility model relates to a four-wire low resistance PCB's impedance change test fixture's overall structure schematic diagram.

Fig. 2 is the utility model relates to a four-wire low resistance PCB's impedance change test fixture's fixed block and test contact connection structure sketch.

Fig. 3 is the utility model relates to a four-wire low resistance PCB's impedance change test fixture's removal frame upper portion schematic diagram.

Figure 4 is the utility model relates to a four-wire low resistance PCB's impedance change test fixture's inside sketch of testboard.

In the figure: 1. a test bench; 2. a chute; 3. a splint; 4. a movable frame; 5. a transverse plate; 6. fixing grooves; 7. a fixed block; 8. a compression spring; 9. testing the contact; 10. a slider; 11. a connecting plate; 12. a connecting rod; 13. fixing threads; 14. fixing a nut; 15. a groove; 16. fixing the spring; 17. a placement groove; 18. a flexible mat.

Detailed Description

In order to make the technical means, the creative features, the achievement purposes and the functions of the present invention easy to understand, in the description of the present invention, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or the positional relationship based on the orientation or the positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "a," "an," "two," and "three" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The present invention will be further described with reference to the following detailed description.

Example 1

As shown in fig. 1-4, an impedance change test fixture for four-wire low-resistance PCBs comprises a test board 1, wherein a sliding groove 2 is formed in the upper surface of the test board 1, a moving frame 4 is connected to the upper side of the sliding groove 2 in a sliding manner, a transverse plate 5 is fixedly mounted at the upper end of the moving frame 4, a fixing groove 6 is formed in the surface of the transverse plate 5, a fixing block 7 is arranged above the fixing groove 6, a connecting rod 12 is fixedly mounted in the middle of the bottom surface of the fixing block 7, the middle of the connecting rod 12 is movably connected with the fixing groove 6 in an inserting manner, and a test contact 9 is fixedly mounted at the bottom of the connecting rod 12.

In this embodiment, a compression spring 8 is fixedly mounted at the bottom of the fixing block 7 and around the connecting rod 12, a connecting plate 11 is fixedly mounted at the bottom of the compression spring 8, and the middle of the connecting plate 11 is slidably connected with the connecting rod 12.

In this embodiment, the bottom of the connecting plate 11 contacts the extension of the horizontal plate 5, and the outer surface of the connecting rod 12 is provided with a fixing thread 13.

In the embodiment, a fixing nut 14 is screwed on the outer surface of the fixing thread 13, and the fixing nut 14 is located below the transverse plate 5.

The embodiment can realize that: test contact 9 passes through connecting rod 12 and fixed block 7 fixed connection, and the bottom of fixed block 7 is connected with connecting plate 11 through compression spring 8, the surface and the fixed slot 6 activity of connecting rod 12 are pegged graft like this, fixed thread 13 has been seted up to the surface of connecting rod 12, accessible fixing nut 14 fixes a plurality of test contacts 9 on diaphragm 5, can install and dismantle test contact 9 fast like this, and the distance between a plurality of test contacts 9 of quick adjustment, can carry out the rapid survey to multi-thread PCB's impedance change like this, better practicality and commonality have.

Example 2

In this embodiment, the bottom fixed mounting who removes frame 4 has slider 10, and slider 10's surface and 2 sliding connection of spout, the upper surface middle part of testboard 1 has seted up standing groove 17, and recess 15 has been seted up along both sides in standing groove 17.

In this embodiment, a fixing spring 16 is fixedly mounted at the inner bottom of the groove 15, a clamping plate 3 is fixedly mounted at one end of the fixing spring 16 far away from the groove 15, and a flexible pad 18 is fixedly mounted at one side of the clamping plate 3 far away from the fixing spring 16.

The embodiment can realize that: splint 3 and flexible pad 18 can carry out the flexible fixation to the PCB board of equidimension not under the promotion of the inside fixed spring 16 of recess 15, prevent that the PCB board from taking place to rock in the test procedure and leading to the test failure, and the slider 10 that removes 4 bottoms slides in the inside of spout 2, carry out the rapid survey to the joint of the position difference of PCB board, have better practicality and the accuracy of test.

It should be noted that the utility model relates to an impedance change test fixture for four-wire low-resistance PCB, when in use, the PCB is placed in the placement groove 17, the clamping plate 3 and the flexible pad 18 can flexibly fix the PCB with different sizes under the push of the fixing spring 16 in the groove 15, to prevent the test failure caused by the shaking of the PCB in the test process, the test contact 9 is fixedly connected with the fixing block 7 through the connecting rod 12, the bottom of the fixing block 7 is connected with the connecting plate 11 through the compression spring 8, so the outer surface of the connecting rod 12 is movably inserted with the fixing groove 6, the outer surface of the connecting rod 12 is provided with the fixing thread 13, a plurality of test contacts 9 can be fixed on the transverse plate 5 through the fixing nut 14, so the test contacts 9 can be rapidly installed and disassembled, and the distance between a plurality of test contacts 9 can be rapidly adjusted, so the impedance change of the multi-wire PCB can be rapidly measured, the output end of the test contact 9 is connected with an external display device, and a user slides the sliding block 10 at the bottom of the movable frame 4 in the sliding groove 2 to quickly measure joints with different positions of the PCB.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an impedance change test fixture of four-wire low resistance PCB, includes testboard (1), its characterized in that: spout (2) have been seted up to the upper surface of testboard (1), the top sliding connection of spout (2) has the removal frame (4), the upper end fixed mounting that removes frame (4) has diaphragm (5), fixed slot (6) have been seted up on the surface of diaphragm (5), the top of fixed slot (6) is provided with fixed block (7), the middle part fixed mounting of the bottom surface of fixed block (7) has connecting rod (12), the middle part and the fixed slot (6) activity of connecting rod (12) are pegged graft, the bottom fixed mounting of connecting rod (12) has test contact (9).

2. The apparatus of claim 1, wherein the apparatus comprises: the bottom of fixed block (7) just is located fixed mounting around connecting rod (12) has compression spring (8), the bottom fixed mounting of compression spring (8) has connecting plate (11), the middle part and connecting rod (12) sliding connection of connecting plate (11).

3. The apparatus of claim 2, wherein the apparatus comprises: the bottom of connecting plate (11) and the epitaxial contact of diaphragm (5), fixed screw thread (13) have been seted up to the surface of connecting rod (12).

4. The fixture for testing the impedance variation of a four-wire low-resistance PCB according to claim 3, wherein: the outer surface threaded connection of fixed screw thread (13) has fixation nut (14), fixation nut (14) are located the below of diaphragm (5).

5. The apparatus of claim 1, wherein the apparatus comprises: the test bench is characterized in that a sliding block (10) is fixedly mounted at the bottom of the movable frame (4), the outer surface of the sliding block (10) is connected with the sliding groove (2) in a sliding mode, a placing groove (17) is formed in the middle of the upper surface of the test bench (1), and grooves (15) are formed in two sides of the inner edge of the placing groove (17).

6. The fixture for testing the impedance variation of a four-wire low-resistance PCB according to claim 5, wherein: the interior bottom fixed mounting of recess (15) has fixed spring (16), the one end fixed mounting who keeps away from recess (15) of fixed spring (16) has splint (3), one side fixed mounting who keeps away from fixed spring (16) of splint (3) has flexible pad (18).