CN218584860U

CN218584860U - Test probe for small welding spot

Info

Publication number: CN218584860U
Application number: CN202221476929.8U
Authority: CN
Inventors: 丁崇亮; 李红叶; 申啸
Original assignee: Weinan Muwang Intelligent Technology Co ltd
Current assignee: Weinan Muwang Intelligent Technology Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2023-03-07
Anticipated expiration: 2032-06-14

Abstract

The utility model discloses a little test probe for solder joint, including the needle tubing, be provided with the spring in the needle tubing, the both ends of needle tubing are provided with first needle axle and second needle axle telescopically, first needle axle tip is spherical, the tip middle part of second needle axle is sunken inwards. The test probe for the small welding spot solves the problems that the existing test probe is not easy to contact with the small welding spot and the welding spot is easy to damage due to puncture.

Description

Test probe for small welding spot

Technical Field

The utility model belongs to the technical field of the semiconductor detects, concretely relates to test probe for little solder joint.

Background

The test probe is a probe that can evaluate electrical characteristics of an integrated circuit, a flat panel display, or the like of a semiconductor element, and performs a power-on inspection and an insulation inspection thereof. As electronic devices are smaller and thinner, circuit welding spots are also reduced gradually, so that the structure of the conventional contact welding spot has problems, the pointed test needle shaft is only in point contact, the welding spot is punctured by large pressure in the use process, and the condition that the finished product needle shaft cannot contact a tested point can be caused if the straightness of the finished product needle shaft is poor after packaging; for a round head test needle shaft, contact between the round head test needle shaft and a contact welding point is often unstable, so that the test effect is often inaccurate.

Therefore, a probe structure for testing small pads is needed to make the probe capable of testing stably without damaging the pads.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a little test probe for solder joint solves current test probe and little solder joint difficult contact and takes place the problem that the solder joint destroyed the solder joint easily of puncturing.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a test probe for little solder joint, includes the needle tubing, be provided with the spring in the needle tubing, the both ends of needle tubing are provided with first needle axle and second needle axle telescopically, first needle axle tip is spherical, the tip middle part of second needle axle is sunken inwards.

As an optimized technical proposal of the utility model, a plurality of bevel gears are arranged on the outer edge of the end part of the second needle shaft.

As an optimized technical scheme of the utility model, the spring is compression spring.

As an optimized technical proposal of the utility model, the two ends of the needle tube are formed with a necking, the outer diameter of the part of the first needle shaft and the second needle shaft extending into the needle tube is larger than the inner diameter of the necking.

As an optimized technical proposal of the utility model, one end of the first needle shaft and one end of the second needle shaft extending into the needle tube are formed with conical surfaces.

The beneficial effects of the utility model are that: (1) The utility model discloses a test probe for small welding spot, the middle part of the second needle shaft contacting with the test welding spot is sunken inwards, can form good contact with the test welding spot, can not slide and drop, has larger contact area, and can realize better contact connection; (2) According to the test probe for the small welding spot, the second needle shaft is not in tip contact with the test welding spot any more, and the test welding spot is not punctured relatively, so that damage is avoided; (3) The utility model discloses a little test probe for solder joint, its overall structure is simple, and manufacturing cost is lower, has better market perspective.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic structural diagram of a test probe for a small solder joint of the present invention.

In the figure: 1. the needle tube, 2. The first needle axle, 3. The spring, 4. The second needle axle.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in figure 1, the utility model discloses a test probe for little solder joint, including needle tubing 1, be provided with spring 3 in the needle tubing 1, the both ends of needle tubing 1 are provided with first needle axle 2 and second needle axle 4 telescopically, and 2 tip of first needle axle are spherical, and the tip middle part of second needle axle 4 is sunken inwards.

When the test fixture is used, the concave position of the second needle shaft 4 is in contact with a test welding spot, the contact surface is large and is not easy to slide, hard contact of the tip between the concave position and the test welding spot is avoided, and the test welding spot is prevented from being pierced to cause damage. The first needle shaft 2 is connected to a test instrument.

As shown in fig. 1, in the testing probe for small solder joints of the present invention, a plurality of bevel teeth are disposed on the outer edge of the end of the second needle shaft 4.

The plurality of conical teeth can wrap the abdomen of the test welding spot at the concave position of the second needle shaft 4, so that the test welding spot is not easy to fall off, and the contact stability between the test welding spot and the second needle shaft is ensured.

As shown in fig. 1, in the testing probe for small solder joints of the present invention, the spring 3 is a compression spring.

The spring 3 can provide elasticity for the first needle shaft 2 and the second needle shaft 4, so that on one hand, the effect of buffering pressure is achieved, damage caused by overpressure contact is avoided, and on the other hand, the second needle shaft 4 can provide pressure to enable the first needle shaft and the second needle shaft to be in good contact with a test welding point.

As shown in figure 1, in the test probe for small welding spots of the present invention, the two ends of the needle tube 2 are formed with a necking, and the outer diameter of the part of the first needle shaft 2 and the second needle shaft 4 extending into the needle tube is larger than the inner diameter of the necking.

The first needle shaft 2 and the second needle shaft 4 cannot be pulled out of the needle tube 1 due to the restriction of the necking under the pressure of the spring 3.

As shown in fig. 1, in the testing probe for small solder joints of the present invention, a conical surface is formed at one end of the first needle shaft 2 and the second needle shaft 4 extending into the needle tube 1.

Design into the conical surface structure with the one end that first needle axle 2 and second needle axle 4 stretched into needle tubing 1, can make the both ends of spring tightly overlap on the terminal surface of first needle axle 2 and second needle axle 4, the elasticity of being convenient for carries the equilibrium, can not make first needle axle 2 and second needle axle 4 slant motion in needle tubing 1, ensures that it has better straightness accuracy.

Therefore, compared with the prior art, the utility model discloses a test probe for little solder joint, with the inside sunken design in the middle part of the second needle axle of test solder joint contact, can with test form good contact between the solder joint, can not take place to slide and drop, area of contact is bigger, can realize better contact connection. The utility model discloses a little test probe for solder joint, no longer carry out the tip contact between second needle axle and the test solder joint, can not puncture the test solder joint relatively, cause destruction. The utility model discloses a little test probe for solder joint, its overall structure is simple, and manufacturing cost is lower, has better marketing use prospect.

While the foregoing specification illustrates and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and from various other combinations, modifications, and environments and is capable of changes within the scope of the invention as expressed herein, commensurate with the above teachings or the skill or knowledge of the relevant art. But variations and modifications which do not depart from the spirit and scope of the invention should be construed as being included in the scope of the appended claims.

Claims

1. The utility model provides a little test probe for solder joint, its characterized in that, includes needle tubing (1), be provided with spring (3) in needle tubing (1), the both ends of needle tubing (1) are provided with first needle axle (2) and second needle axle (4) telescopically, first needle axle (2) ground tip is spherical, the tip middle part of second needle axle (4) is sunken inwards.

2. The test probe for small spot welding according to claim 1, wherein the outer edge of the end of the second needle shaft (4) is provided with a plurality of conical teeth.

3. The test probe for small pads according to claim 2, characterized in that said spring (3) is a compression spring.

4. The small welding point test probe according to claim 3, wherein the two ends of the needle tube (1) are formed with a necking, and the outer diameter of the part of the first needle shaft (2) and the second needle shaft (4) extending into the needle tube is larger than the inner diameter of the necking.

5. The test probe for small spot welding according to claim 4, wherein the ends of the first needle shaft (2) and the second needle shaft (4) extending into the needle tube (1) are formed with a tapered surface.