CN219417570U - Test needle - Google Patents

Abstract

The utility model provides a test needle which is characterized by comprising a base, wherein at least one first needle shaft and at least one second needle shaft are arranged on the base in a floating manner, a first shaft head is detachably arranged at a test end of the first needle shaft, a second shaft head is detachably arranged at a test end of the second needle shaft, and a plurality of convex tooth structures uniformly distributed in an array are arranged on the end faces of the first shaft head and the second shaft head; the base is provided with a mounting part for connection and installation, the mounting part is provided with at least two elastic buckle structures uniformly distributed along the axial direction, and the elastic buckle structures are provided with limiting protruding parts which are reversely limited and protruding outwards.

Description

Test needle

Technical Field

The utility model relates to the field of test probes, in particular to a test needle.

Background

In the package test of an Integrated Circuit (IC) device, after a test pin is installed and fixed on a jig according to a point location to be detected by the IC, the test pin is used as a conducting device between the IC and a detecting device, so that a plurality of point locations can be synchronously detected in one test.

As disclosed in chinese patent CN104614610B, a modular needle bed tooling for testing PCBA is disclosed, with a bulletin day 2017.09.19, specifically described as including a tooling body, a needle bed module and a PCBA crimping module, wherein the tooling body includes a tooling box, a needle bed positioning pin, a pressing mechanism, and a PCBA crimping module fixing platen. The replaceable needle bed module comprises a test probe, a PCBA tray to be tested, a connecting bearing and a spring, a test probe fixing module and a test probe switching PCB. The replaceable PCBA crimping module comprises a module main body, a PCBA crimping column and a manual screw hole; specifically through install the test probe on the needle bed module after, through remove the needle bed module and carry out the synchronous detection of multiple spot to the PCBA that needs the test.

As another example, chinese patent CN101846695a discloses a test probe and a probe holder, the publication date is 2010.09.29, and it is specifically described that the test probe comprises: the device comprises a tube body, a first probe head, a second probe head, a first spring and a second spring. The inner area of the pipe body is divided into a first accommodating space and a second accommodating space by a spacing part, wherein the first accommodating space comprises a first spring with a first elastic coefficient, the second accommodating space comprises a second spring with a second elastic coefficient, and the first elastic coefficient of the first spring is different from the second elastic coefficient of the second spring. The first probe head and the second probe head are arranged at two ends of the tube body, wherein one end of the first probe head is connected with the first spring, and the other end of the first probe head extends out of the tube body and contacts with an integrated circuit element to be tested when the integrated circuit element is tested; one end of the second probe head is connected with the second spring, and the other end of the second probe head extends out of the pipe body to be contacted with the printed circuit board; namely, it is disclosed that different probe heads are arranged at two ends, and the probe heads at two ends are pushed by springs with different elastic coefficients to realize different compression forms, so that integrated circuit elements at two ends are tested.

The needle bed module and the test probe structure for testing the integrated circuit element are disclosed in the above patent, but there may be a problem of relative movement between the contact portion of the test probe and the integrated circuit element during the test, and the related structure of quick mounting or dismounting of the test probe is not disclosed in the above patent.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a test needle, which solves the problems that the relative movement between a test probe and an integrated circuit element to be tested disclosed in the prior art possibly exists and the test probe is quickly installed or disassembled.

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

the test needle is characterized by comprising a base, wherein at least one first needle shaft and at least one second needle shaft are arranged on the base in a floating mode, a first shaft head is detachably arranged at the test end of the first needle shaft, a second shaft head is detachably arranged at the test end of the second needle shaft, and a plurality of convex tooth structures uniformly distributed in an array are arranged on the end faces of the first shaft head and the second shaft head; the base is provided with a mounting part for connection and installation, the mounting part is provided with at least two elastic buckle structures uniformly distributed along the axial direction, and the elastic buckle structures are provided with limiting protruding parts which are reversely limited and protruding outwards.

Preferably, the base is provided with a first step hole for slidably mounting the first needle shaft and a second step hole for slidably mounting the second needle shaft; one end, far away from the first shaft head, of the first needle shaft extends out of the first step hole and is provided with a first clamp spring; and one end, far away from the second shaft head, of the second needle shaft extends out of the second step hole and is provided with a second clamp spring.

Preferably, the first needle shaft is sleeved with a first spring for pushing the first needle shaft to reset, and the second needle shaft is sleeved with a second spring for pushing the second needle shaft to reset.

Preferably, the shaft diameter of the second needle shaft is larger than that of the first needle shaft, the number of the first needle shafts is 2, and the number of the first needle shafts is 1; the first needle shaft and the second needle shaft are arranged in a triangular mode.

Preferably, a first plug connector for installing the first shaft head is arranged on the first needle shaft, the first plug connector comprises a first clamping part and a first guiding part, the shaft diameter of the first clamping part is gradually reduced, and a first guiding conical surface is arranged between the first clamping part and the first guiding part.

Preferably, a first inserting hole is formed in the first shaft head, and a first guiding inclined plane is formed in the opening edge of the first inserting hole; the first clamping part is in fastening fit with the first inserting hole.

Preferably, a second plug connector for installing the second shaft head is arranged on the second needle shaft, the second plug connector comprises a second clamping part with a gradually reduced shaft diameter and a second guiding part, and a second guiding conical surface is arranged between the second clamping part and the second guiding part.

Preferably, a second inserting hole is formed in the second shaft head, and a second guiding inclined plane is formed in the opening edge of the second inserting hole; the second clamping part is in fastening fit with the second plug hole.

Preferably, the base is further provided with a positioning part with a step structure.

Preferably, the base is of an integral injection molding structure, and the material of the base is PA46; the first needle shaft, the second needle shaft, the first shaft head and the second shaft head are all made of copper materials.

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

1. the first shaft head is detachably arranged on the first needle shaft, the second shaft head is detachably arranged on the second needle shaft, so that the first shaft head and the second shaft head can be replaced to adapt to different test requirements, and the first shaft head and the second shaft head can be replaced by the detachable structure to adapt to the situation of replacement due to abrasion after long-time use;

2. the cross sections of the first shaft head and the second shaft head are provided with a plurality of convex tooth structures uniformly distributed in an array, so that the first shaft head and the second shaft head can be reliably contacted with the detection circuit board under the action of the convex tooth structures during testing, and the condition of relative sliding is avoided;

3. and meanwhile, the mounting part is arranged on the base, and after the elastic buckle structure is arranged on the mounting part, the quick disassembly or the installation can be carried out, so that the test needle can be quickly assembled or disassembled at a plurality of test points according to the test requirement.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present utility model;

FIG. 3 is a schematic view of a base structure according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a first needle shaft according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a first shaft head according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a second needle shaft according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a second hub according to an embodiment of the present utility model;

in the drawing the view of the figure,

the device comprises a base 1, a mounting part 101, an elastic buckling structure 102, a limiting protruding part 103, a first step hole 104, a second step hole 105, a positioning part 106, a first needle shaft 2, a first plug connector 21, a first clamping part 22, a first guiding part 23, a first guiding conical surface 24, a second needle shaft 3, a second plug connector 31, a second clamping part 32, a second guiding part 33, a second guiding conical surface 34, a first shaft head 4, a first plug hole 41, a first guiding inclined plane 42, a second shaft head 5, a second plug hole 51, a second guiding inclined plane 52, a convex tooth structure 6, a first clamp spring 7, a second clamp spring 8, a first spring 9 and a second spring 10.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

As shown in fig. 1 to 7, in the embodiment of the present utility model, a test pin is provided, and the test pin is used for being mounted on a fixture, and is mounted according to the distribution condition of the circuit board contacts to be detected, so that the fixture can be moved during the test process to realize that the test pin contacts the circuit board for conducting test; the specific test needle is used for conducting between the circuit board to be tested and the testing equipment. Specifically, the test needle includes base 1 and floating installation has at least one first needle shaft 2 and at least one second needle shaft 3 on base 1, wherein at the test end demountable installation of first needle shaft 2 first spindle nose 4, simultaneously demountable installation has second spindle nose 5 at the test end of second needle shaft 3, and all be equipped with a plurality of dogtooth structures 6 of array equipartition at the terminal surface of first spindle nose 4 and second spindle nose 5, in the test process, can realize the antiskid and keep good effect of contact through dogtooth structure 6 after first spindle nose 4, second spindle nose 5 contact the circuit board, and first spindle nose 4 and second spindle nose 5 demountable change and change after frequent use, avoid causing the condition that changes the whole test needle, reduce maintenance cost.

In order to facilitate the quick installation of the whole test needle on the jig and realize fixed limit, and simultaneously, the operation of convenient disassembly can be carried out in the subsequent maintenance, an installation part 101 for connection installation is arranged on the base 1, the installation part 101 is in a columnar structure and can form positioning fit with an installation hole site on the jig, at least two elastic buckle structures 102 which are uniformly distributed along the axial direction are arranged on the installation part 101, and a limit protruding part 103 which is reversely limited and protrudes outwards is arranged on the elastic buckle structure 102; namely, after the test needle is mounted on the jig, connection is realized through the elastic buckle structure 102, and the elastic buckle structure 102 is prevented from reversely loosening under the action of the limiting protruding part 103.

In order to guide the floating process of the first needle shaft 2 and the second needle shaft 3, a first step hole 104 for slidably mounting the first needle shaft 2 and a second step hole 105 for slidably mounting the second needle shaft 3 are formed in the base 1, so that the first needle shaft 2 slides in the first step hole 104, and in order to avoid the situation that the first needle shaft 2 falls off from the base 1, one end, far away from the first shaft head 4, of the first needle shaft 2 extends out of the first step hole 104 and is provided with a first clamp spring 7; the second needle shaft 3 slides in the second step hole 105, and in order to avoid the second needle shaft 3 from falling off the base 1, one end of the second needle shaft 3 far away from the second shaft head 5 extends out of the second step hole 105 and is provided with a second clamp spring 8; the first needle shaft 2 and the second needle shaft 3 are limited under the action of the first clamp spring 7 and the second clamp spring 8, and the falling-off condition is avoided.

Meanwhile, in order to reset the floating positions of the first needle shaft 2 and the second needle shaft 3 after each test, a first spring 9 for pushing the first needle shaft 2 to reset is sleeved on the first needle shaft 2, a second spring 10 for pushing the second needle shaft 3 to reset is sleeved on the second needle shaft 3, the first spring 9 is compressed by the first needle shaft 2 to float in each test process, the second spring 10 is compressed by the second needle shaft 3 to float, after external force disappears, the first needle shaft 2 is reset under the action of the first spring 9, the second needle shaft 3 is reset under the action of the second spring 10, the next test is facilitated, and good fitting and conducting effects after contact are ensured.

In particular, when the test needle is used for performing related function tests, such as testing different functions of power, current, signals and the like, different requirements are set on the conductive sectional areas, so that in order to adapt to the conductive sectional area difference required by the corresponding detection process of combined signal detection in the detection process, the shaft diameter of the second needle shaft 3 is larger than that of the first needle shaft 2, the number of the first needle shafts 2 is 2, and the number of the first needle shafts 2 is 1; and the first needle shaft 2 and the second needle shaft 3 are arranged in a triangle.

In order to realize reliable plugging of the first shaft head 4 and ensure that the first shaft head 4 cannot fall off, a first plug connector 21 for installing the first shaft head 4 is arranged on the first needle shaft 2, the first plug connector 21 comprises a first clamping part 22 with gradually reduced shaft diameter and a first guiding part 23, and a first guiding conical surface 24 is arranged between the first clamping part 22 and the first guiding part 23; meanwhile, a first inserting hole 41 is formed in the first shaft head 4, and a first guide part 23 is arranged at the edge of the opening of the first inserting hole 41; the first clamping part 22 is in fastening fit with the first plug hole 41; when the first shaft head 4 is inserted into the first inserting hole 41, the first guiding part 23 is guided to move into the first inserting hole 41 after contacting with the first guiding inclined surface 42, and the first guiding part 23 is guided when moving in the first inserting hole 41, and the first clamping part 22 and the first inserting hole 41 can be ensured to be in a reliable and stable contact state, so that stable and reliable connection between the first shaft head 4 and the first inserting head 21 is realized.

Meanwhile, in order to prevent the second shaft head 5 from falling, a second plug connector 31 for installing the second shaft head 5 is provided on the second needle shaft 3, the second plug connector 31 includes a second clamping portion 32 with a gradually reduced shaft diameter and a second guiding portion 33, and a second guiding conical surface 34 is provided between the second clamping portion 32 and the second guiding portion 33; the second shaft head 5 is provided with a second inserting hole 51, and the edge of the opening of the second inserting hole 51 is provided with a second guiding inclined plane 52; the second clamping part 32 is in fastening fit with the second plug hole 51; in this way, a guiding action can also be produced during the insertion of the second guide 33, and a secure engagement of the second clamping part 32 with the second socket 51 is ensured, so that a stable mounting of the second shaft head 5 on the second socket 31 is achieved.

In order to facilitate reliable positioning after the entire test needle is mounted and to enable good guiding of the first needle shaft 2, the second needle shaft 3, a positioning portion 106 having a stepped structure is further provided on the base 1.

The base 1 is required to be insulated, the conductivity of the first needle shaft 2 and the second needle shaft 3 in the base is not interfered, the adjacent first needle shaft 2 and second needle shaft 3 can be isolated and insulated, the base 1 is an integral injection molding structure, and the base is made of PA46; the first needle shaft 2, the second needle shaft 3, the first shaft head 4 and the second shaft head 5 are all made of copper, so that the whole base 1 is made of insulating materials, and the copper materials, such as tin bronze, can ensure the conductive effect and reduce the resistance.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (10)

1. A test needle, characterized in that: the novel needle shaft comprises a base (1), wherein at least one first needle shaft (2) and at least one second needle shaft (3) are arranged on the base (1) in a floating mode, a first shaft head (4) is detachably arranged at a test end of the first needle shaft (2), a second shaft head (5) is detachably arranged at a test end of the second needle shaft (3), and a plurality of convex tooth structures (6) uniformly distributed in an array are arranged on the end faces of the first shaft head (4) and the second shaft head (5);

the base (1) is provided with a mounting part (101) for connection and mounting, the mounting part (101) is provided with at least two elastic fastening structures (102) uniformly distributed along the axial direction, and the elastic fastening structures (102) are provided with limiting protruding parts (103) which are reversely limited and protruding outwards.

2. A test needle as defined in claim 1, wherein: the base (1) is provided with a first step hole (104) for sliding mounting the first needle shaft (2) and a second step hole (105) for sliding mounting the second needle shaft (3);

one end, far away from the first shaft head (4), of the first needle shaft (2) extends out of the first step hole (104) and is provided with a first clamp spring (7);

one end, far away from the second shaft head (5), of the second needle shaft (3) extends out of the second step hole (105) and is provided with a second clamp spring (8).

3. A test needle as claimed in claim 2, wherein: the first needle shaft (2) is sleeved with a first spring (9) for pushing the first needle shaft to reset, and the second needle shaft (3) is sleeved with a second spring (10) for pushing the second needle shaft to reset.

4. A test needle according to any one of claims 1-3, characterized in that: the shaft diameter of the second needle shaft (3) is larger than that of the first needle shaft (2), the number of the first needle shafts (2) is 2, and the number of the first needle shafts (2) is 1;

the first needle shaft (2) and the second needle shaft (3) are arranged in a triangle.

5. A test needle as defined in claim 1, wherein: the novel needle shaft is characterized in that a first plug connector (21) for installing the first shaft head (4) is arranged on the first needle shaft (2), the first plug connector (21) comprises a first clamping part (22) with a gradually reduced shaft diameter and a first guiding part (23), and a first guiding conical surface (24) is arranged between the first clamping part (22) and the first guiding part (23).

6. A test needle as defined in claim 5, wherein: a first plug hole (41) is formed in the first shaft head (4), and a first guide inclined plane (42) is formed in the edge of an opening of the first plug hole (41);

the first clamping part (22) is in fastening fit with the first plug hole (41).

7. A test needle as defined in claim 1, wherein: the second needle shaft (3) is provided with a second plug connector (31) for installing the second shaft head (5), the second plug connector (31) comprises a second clamping part (32) with gradually reduced shaft diameter and a second guiding part (33), and a second guiding conical surface (34) is arranged between the second clamping part (32) and the second guiding part (33).

8. A test needle as defined in claim 7, wherein: a second inserting hole (51) is formed in the second shaft head (5), and a second guide inclined plane (52) is formed in the edge of the opening of the second inserting hole (51);

the second clamping part (32) is in fastening fit with the second plug hole (51).

9. A test needle according to any one of claims 1-3, characterized in that: the base (1) is also provided with a positioning part (106) with a step structure.

10. A test needle as defined in claim 9, wherein: the base (1) is of an integral injection molding structure, and is made of PA46;

the first needle shaft (2), the second needle shaft (3), the first shaft head (4) and the second shaft head (5) are all made of copper materials.