CN219201774U

CN219201774U - Steel sheet ground resistance test fixture

Info

Publication number: CN219201774U
Application number: CN202223310718.XU
Authority: CN
Inventors: 肖文军; 李伟丰
Original assignee: Shenzhen Xinyu Tengyue Electronics Co Ltd
Current assignee: Shenzhen Xinyu Tengyue Electronics Co Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-06-16
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to the technical field of FPC steel sheet grounding resistance test, in particular to a steel sheet grounding resistance test fixture, which comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die main board and an upper die pressing board; the lower die assembly comprises a lower die main plate, a lower die needle disc, a lower die supporting plate and a product mounting plate which are sequentially mounted, a test needle is arranged on the lower die needle disc, an elastic piece is arranged between the product mounting plate and the lower die supporting plate, and through holes for the test needle to pass through are formed in the lower die supporting plate and the product mounting plate; when the product mounting panel does not receive external force, the product mounting panel is higher than the test needle, and the test needle is located the through-hole, and the tip of test needle has protected this moment, avoids taking place collision deformation. When the upper die assembly and the lower die assembly are assembled, the test needle passes through the through hole and contacts with the product test point. The product mounting plate is firstly abutted against the elastic piece, and the test needle slowly passes through the through hole and contacts with the product test point under the buffer effect of the elastic piece.

Description

Steel sheet ground resistance test fixture

Technical Field

The utility model relates to the technical field of FPC steel sheet grounding resistance test, in particular to a steel sheet grounding resistance test fixture.

Background

The probe test device is generally used for testing a circuit board, and a test probe is required to be contacted with the circuit board during testing. There are two-wire and four-wire test probe devices according to the difference of the test methods.

The two-wire test probe device is used for occasions with low requirements on the accuracy of the test resistance, and the four-wire test probe device is used for occasions with high requirements on the low resistance. The diameter of the existing composite jig adopting a test probe is very small, the test process is easy to bend, and potential quality hazards are caused to products.

Disclosure of Invention

The utility model aims to provide a steel sheet grounding resistance testing tool for solving the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is to provide a steel sheet grounding resistance testing tool, which comprises:

the upper die assembly comprises an upper die main plate and an upper die pressing plate;

the lower die assembly comprises a lower die main board, a lower die needle disc, a lower die supporting board and a product mounting board which are sequentially mounted, wherein a test needle is arranged on the lower die needle disc, an elastic piece is arranged between the product mounting board and the lower die supporting board, and through holes for the test needle to pass through are formed in the lower die supporting board and the product mounting board;

when the product mounting plate is not subjected to external force, the product mounting plate is higher than the test needle, and the test needle is positioned in the through hole;

when the upper die assembly and the lower die assembly are assembled, the test needle passes through the through hole and contacts with the product test point.

Further, the steel sheet grounding resistance testing tool further comprises a guide post, and the guide post sequentially penetrates through the upper die assembly and the lower die assembly.

Further, the test needle is of a ladder structure, and the projection area of the ladder part at the top end of the test needle is smaller than that of the ladder part at the bottom.

Further, the test needle is of at least two-section ladder structure, each section of ladder portion is arranged in a cylinder shape, and each section of ladder portion of the test needle is arranged along the same axis.

Further, the test needle is an elastic needle.

Further, the product mounting plate is provided with test positions, each test position comprises two through holes which are adjacently arranged, the two through holes correspond to two connecting ends of a product to be tested respectively, and each through hole is penetrated by two test needles.

Further, a plurality of test sites are arranged on the product mounting plate.

Further, at least two isolation plates are arranged between the lower die needle dial and the lower die supporting plate.

Further, the upper die assembly further comprises an upper die dial, and the upper die dial is located between the upper die main plate and the upper die pressing plate.

The utility model has the beneficial effects that:

1. be equipped with the elastic component between product mounting panel and the lower mould backup pad, when the product mounting panel did not receive external force, the product mounting panel was higher than the test needle, and the test needle is located the through-hole, and the tip of test needle has been protected this moment, avoids taking place collision deformation. When the upper die assembly and the lower die assembly are assembled, the product mounting plate is firstly abutted against the elastic piece, and the test needle slowly passes through the through hole and contacts with the product test point under the buffer effect of the elastic piece.

2. Through setting up the guide post, can lead the removal of last module and lower module for go up module and lower module when removing, can carry out accurate compound die.

3. The test needle is of a ladder structure, and the projection area of the ladder part at the top end of the test needle is smaller than that of the ladder part at the bottom. When carrying out the butt test, the direct butt product of ladder part that bottom projected area is little, and the ladder part centre gripping that bottom projected area is big is fixed on the lower mould dial, and the test needle is fixed more steady this moment, even at the in-process of butt collision product, also difficult result in the test needle fracture. The test needle adopting the step structure has the advantages that the integral structure of the test needle is enhanced, and the problems of deformation and needle breakage of the test needle in the test process are effectively avoided.

4. The product mounting plate is provided with a plurality of test positions, so that the resistance values of a plurality of products can be tested simultaneously, and the test efficiency is higher.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an open mode state of a steel sheet grounding resistance test tool provided by an embodiment of the utility model;

FIG. 2 is a schematic diagram of a mold closing state of a steel sheet grounding resistance testing tool according to an embodiment of the utility model;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic perspective view of a mold opening state of a steel sheet grounding resistance testing tool according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a product mounting board used in the steel sheet grounding resistance testing tool according to the embodiment of the present utility model.

Reference numerals illustrate:

1. an upper die assembly; 11. an upper die main board; 12. an upper die pressing plate; 13. an upper mould dial; 2. a lower die assembly; 21. a lower die main board; 22. a lower mold dial; 221. a test needle; 23. a lower die supporting plate; 24. a product mounting plate; 241. a test site; 25. an elastic member; 26. a through hole; 3. a guide post; 4. and a partition plate.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1 to 5, as a steel sheet grounding resistance testing tool provided by the embodiment of the utility model, the steel sheet grounding resistance testing tool comprises an upper die assembly 1 and a lower die assembly 2, wherein the upper die assembly 1 comprises an upper die main plate 11 and an upper die pressing plate 12; the lower die assembly 2 comprises a lower die main plate 21, a lower die needle dial 22, a lower die supporting plate 23 and a product mounting plate 24 which are sequentially mounted, wherein a test needle 221 is arranged on the lower die needle dial 22, an elastic piece 25 is arranged between the product mounting plate 24 and the lower die supporting plate 23, and through holes 26 for the test needle 221 to pass through are formed in the lower die supporting plate 23 and the product mounting plate 24; when the product mounting plate 24 is not subjected to external force, the product mounting plate 24 is higher than the test pins 221, and the test pins 221 are positioned in the through holes 26; when the upper die assembly 1 and the lower die assembly 2 are clamped, the test pins 221 pass through the through holes 26 and contact the product test points.

An elastic piece 25 is arranged between the product mounting plate 24 and the lower die supporting plate 23, when the product mounting plate 24 is not subjected to external force, the product mounting plate 24 is higher than the test needle 221, the test needle 221 is positioned in the through hole 26, and at the moment, the end part of the test needle 221 is protected to avoid collision deformation. When the upper die assembly 1 and the lower die assembly 2 are assembled, the product mounting plate 24 is firstly abutted against the elastic piece 25, and the test needle 221 slowly passes through the through hole 26 and contacts with the product test point under the buffer action of the elastic piece 25. Wherein the elastic member 25 may be an elastic column or an elastic pad.

Specifically, the steel sheet ground resistance test fixture further comprises a guide post 3, and the guide post 3 sequentially penetrates through the upper die assembly 1 and the lower die assembly 2. In this embodiment, the guide post 3 is cylindrical, the upper die assembly 1 and the lower die assembly 2 are respectively provided with the guide post 3, and the guide post 3 on the lower die assembly 2 can be inserted into the guide post 3 of the upper die assembly 1 and slidably connected with the guide post 3. The operation processes of opening and closing the upper die assembly 1 and the lower die assembly 2 are precisely moved by the moving equipment. At least two separating plates 4 are arranged between the lower mould needle dial 22 and the lower mould supporting plate 23. The specific quantity of the isolation plates 4 is determined through the height of the test needle 221 and the thickness of the isolation plates 4, the isolation plates 4 are used for cushioning the lower die supporting plate 23, the test needle 221 and a product are conveniently subjected to the abutting test, and the damage to the test needle 221 caused by overlarge abutting pressure of the test needle 221 and the product is avoided. Wherein, a plurality of isolation plates 4 are also arranged between the upper die main plate 11 and the upper die pressing plate 12.

Further, the upper die assembly 1 may further include an upper die dial 13, and the upper die dial 13 is located between the upper die main plate 11 and the upper die plate 12. The upper mold needle plate 13 is provided with a test needle 221, the upper mold pressing plate 12 is provided with a through hole 26 for the test needle 221 to pass through, and the test needle 221 passes through the through hole 26 and abuts against a point to be tested of the product. In this embodiment, the two sides of the product mounting plate 24 can be used for mounting and placing products, and the test needles 221 of the upper mold dial 13 and the lower mold dial 22 can respectively detect the products on the two different sides of the product mounting plate 24, so that the detection efficiency is higher.

As a variant, the upper and lower

mold needle plates

13 and 22 may alternatively be installed, which may be specifically determined according to the actual use requirements.

Further, the test needle 221 has a stepped structure, and the projected area of the stepped portion at the top end of the test needle 221 is smaller than that of the stepped portion at the bottom.

Specifically, the test needle 221 is an elastic needle, and the elastic needle has a certain buffering function, so that rigid contact can be avoided. The test needle 221 has at least two steps, each step is cylindrical, and each step of the test needle 221 is disposed along the same axis. When the butt test is carried out, the step part with small bottom projection area is directly abutted against the product, the step part with large bottom projection area is clamped and fixed on the lower die needle dial 22, and the test needle 221 is fixed more stably at the moment, so that the test needle 221 is not easy to break even in the process of butt collision against the product. By adopting the test needle 221 with the step structure, the whole structure of the test needle 221 is enhanced, and the problems of deformation and needle breakage of the test needle 221 in the test process are effectively avoided.

Further, the product mounting board 24 is provided with test sites 241, each test site 241 includes two through holes 26 disposed adjacently, the two through holes 26 respectively correspond to two connection ends of the product to be tested, and each through hole 26 is penetrated by two test pins 221. By adopting the structure, the two test pins 221 are provided with one test point, four-wire test is convenient to perform, the contact resistance between the test pins 221 and the steel sheet is effectively reduced, and the test precision is higher.

Further, the product mounting plate 24 is provided with a plurality of test sites 241, so that the resistance values of a plurality of products can be tested simultaneously, and the testing efficiency is higher.

The embodiments of the present utility model are all preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. Steel sheet ground resistance test fixture, its characterized in that includes:

an upper die assembly (1) comprising an upper die main plate (11) and an upper die pressing plate (12);

the lower die assembly (2) comprises a lower die main plate (21), a lower die needle disc (22), a lower die supporting plate (23) and a product mounting plate (24) which are sequentially mounted, wherein a test needle (221) is arranged on the lower die needle disc (22), an elastic piece (25) is arranged between the product mounting plate (24) and the lower die supporting plate (23), and through holes (26) for the test needle (221) to pass through are formed in the lower die supporting plate (23) and the product mounting plate (24);

when the product mounting plate (24) is not subjected to external force, the product mounting plate (24) is higher than the test needle (221), and the test needle (221) is positioned in the through hole (26);

when the upper die assembly (1) and the lower die assembly (2) are clamped, the test needle (221) passes through the through hole (26) and contacts with a product test point.

2. The steel sheet grounding resistance testing tool according to claim 1, further comprising a guide post (3), wherein the guide post (3) sequentially penetrates through the upper die assembly (1) and the lower die assembly (2).

3. The steel sheet grounding resistance testing tool according to claim 1, wherein the testing needle (221) is of a step structure, and the projection area of a step part at the top end of the testing needle (221) is smaller than that of a step part at the bottom.

4. The steel sheet grounding resistance testing tool according to claim 2, wherein the testing needle (221) is of at least two-stage ladder structure, each stage ladder part is arranged in a cylindrical shape, and each stage ladder part of the testing needle (221) is arranged along the same axis.

5. A steel sheet ground resistance test fixture according to claim 3, wherein the test pin (221) is an elastic pin.

6. The steel sheet grounding resistance testing tool according to claim 1, wherein a testing position (241) is arranged on the product mounting plate (24), each testing position (241) comprises two through holes (26) which are adjacently arranged, the two through holes (26) respectively correspond to two connecting ends of a product to be tested, and each through hole (26) penetrates through two testing needles (221).

7. The steel sheet grounding resistance testing tool as set forth in claim 6, wherein a plurality of testing sites (241) are provided on the product mounting plate (24).

8. The steel sheet grounding resistance testing tool according to claim 1, wherein at least two isolation plates (4) are arranged between the lower die needle dial (22) and the lower die supporting plate (23).

9. The steel sheet grounding resistance testing tool according to claim 1, wherein the upper die assembly (1) further comprises an upper die dial (13), and the upper die dial (13) is located between the upper die main plate (11) and the upper die pressing plate (12).