Single-action spring needle suitable for ultra-small gold finger width

Abstract

The utility model discloses a single -action spring needle suitable for super small gold finger width, aims at providing a simple structure, can realize the needle of super narrow gold finger, and each tooth stress is more scattered and uniform, stress concentration, the needle of non -slip suitable for super small gold finger width single -action spring needle. The utility model discloses a spring rod and symmetrical crown needle head module, the symmetrical crown needle head module includes needle head main part and crown tooth, and a plurality of groups crown tooth array setting in the needle head main part compression fit end, the needle head main part connecting end with spring rod elastic movable end is connected, and spring rod elastic movable end drive a plurality of groups crown tooth compression fit end and external product gold finger needle position cooperation. The utility model discloses be applied to the technical field of spring needle.

Description

Technical Field

[0001] This invention relates to the technical field of spring needles, and in particular to a single-action spring needle suitable for ultra-small gold finger widths. Background Technology

[0002] Spring-loaded probes complement traditional probes, offering advantages such as more contact surfaces, better conductivity, lower impedance, and easier maintenance. They are suitable for testing electronic components, semi-finished products, and finished products, particularly for planar conductive contacts on gold fingers and easily damaged flexible flat cables. They are applicable to gold finger surfaces with tin, nickel, silver, or gold plating. Currently, there are many types of spring-loaded probe tips on the market, each suited to different testing environments. For conductivity testing of narrow test points on the same plane on PCBs or flexible flat cables, existing spring-loaded probes suffer from stress concentration and slippage when subjected to uneven force or surface instability, potentially damaging the tested product. Furthermore, their unidirectional tip design and shallow grooves result in relatively poor resistance to contamination, and unstable conductivity and contact impedance. Designing a simple, single-action spring-loaded probe capable of penetrating ultra-narrow gold fingers with more dispersed and uniform force distribution across the teeth, preventing stress concentration and slippage, would solve these problems. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a single-action spring needle with a simple structure that can be used to insert needles into ultra-narrow gold fingers, and the force on each tooth is more dispersed and uniform, with stress concentration and no slippage during needle insertion.

[0004] The technical solution adopted by this utility model is as follows: This utility model includes a spring rod and a symmetrical crown needle module. The symmetrical crown needle module includes a needle body and crown teeth. Several sets of crown teeth arrays are arranged on the pressing end of the needle body. The connecting end of the needle body is connected to the elastic movable end of the spring rod. The elastic movable end of the spring rod drives the pressing end of several sets of crown teeth to cooperate with the lower needle position of the gold finger of the external product.

[0005] Furthermore, the crown teeth are in the shape of a truncated triangle, and the bottom of several crown teeth are connected to the pressing end of the needle body. The pressing end of the crown teeth is the linear long side of the top of the truncated triangle structure.

[0006] Furthermore, both sides of the outer edge of the needle body are provided with clearance grooves. The two sets of clearance grooves are parallel to each other and the extension direction of the clearance grooves is perpendicular to the extension direction of the crown tooth pressing end. The two ends of the crown tooth are respectively on the same plane as the two sets of clearance grooves.

[0007] Furthermore, a V-shaped through groove is formed between the adjacent surfaces of the two sets of crown teeth.

[0008] Furthermore, a fixed connector is provided at the end of the spring rod away from the symmetrical coronal needle module. The fixed connector is connected and conductive to the fixed end of the external test needle mold. The fixed connector is connected to the symmetrical coronal needle module through the spring rod.

[0009] Furthermore, the crown teeth are configured in three groups, and the three groups of crown teeth are evenly arranged at the pressing end of the needle body.

[0010] Furthermore, the diameter of the connecting end of the needle body is the same as the diameter of the connecting end of the spring rod, and the distance between the two sets of clearance grooves is two-thirds of the diameter of the needle body.

[0011] The beneficial effects of this utility model are: for continuity testing of ultra-narrow test points on the same plane of PCB or flexible flat cable, especially the gold finger guide contact point of flexible flat cable is easily damaged. Different surface plating and processing conditions, such as a small amount of flux on the surface, can lead to significant differences in continuity and impedance feedback, or unstable performance. The spring pin in this application adopts a symmetrical crown head shape, with a specific distance between the two opposing teeth. Compared with the traditional vertical and deepened bottom groove, it reduces the distribution of force and gravity, and the force is more uniform, thereby improving the ability to resist dirt, improving continuity, and reducing the possibility of damage to the tested product. Attached Figure Description

[0012] Figure 1 This is the front view of this utility model; Figure 2 This is a three-dimensional view of the symmetrical coronal needle module; Figure 3 This is the left view of this utility model; Figure 4 This is the right view of this utility model; Figure 5 This is a top view of the symmetrical coronal needle module. Detailed Implementation

[0013] like Figures 1 to 5 As shown, in this embodiment, the present invention includes a spring rod 1 and a symmetrical crown-shaped needle module 2. The symmetrical crown-shaped needle module 2 includes a needle body 3 and crown teeth 4. Several sets of crown teeth 4 are arrayed on the pressing end of the needle body 3. The connecting end of the needle body 3 is connected to the elastic movable end of the spring rod 1. The elastic movable end of the spring rod 1 drives the pressing end of several sets of crown teeth 4 to cooperate with the lower needle position of the gold finger of the external product. It can be seen that the symmetrical crown-shaped needle module 2 adopts multiple sets of crown teeth 4 symmetrically arrayed, with a specific distance between the teeth on both sides. Compared with the traditional vertically deepened bottom groove, it reduces the distribution of force and gravity, and the force is more uniform, thereby improving the resistance to dirt, improving conductivity, and reducing the possibility of damage to the tested product.

[0014] like Figure 2 As shown, in this embodiment, the crown teeth 4 are truncated triangular in shape, and the bottoms of several crown teeth 4 are connected to the pressing end of the needle body 3. The pressing end of the crown teeth 4 is the long linear side of the top of the truncated triangular structure. Therefore, the long linear side of the crown teeth 4 allows the needle to conform more gently to the shape of the gold fingers, resulting in a larger contact surface and more uniform force distribution.

[0015] like Figure 2 and Figure 3 As shown, in this embodiment, both sides of the outer edge of the needle body 3 are provided with clearance grooves 5. The two sets of clearance grooves 5 are parallel to each other, and the extending direction of the clearance grooves 5 is perpendicular to the extending direction of the pressing end of the crown tooth 4. The two ends of the crown tooth 4 are respectively on the same plane as the two sets of clearance grooves 5. It can be seen that the clearance grooves 5 can make the passage of several sets of crown teeth 4 more efficient, and are suitable for various needle insertion conditions.

[0016] like Figure 2 As shown, in this embodiment, a V-shaped through groove 6 is formed between the adjacent surfaces of the two sets of crown teeth 4. Therefore, the V-shaped through groove between the two sets of crown teeth 4, with its non-perpendicular, deepened bottom, reduces the distribution of gravitational forces, resulting in more uniform force distribution and improved resistance to dirt and grime.

[0017] like Figure 1 and Figure 5 As shown, in this embodiment, a fixed connector 7 is provided at the end of the spring rod 1 away from the symmetrical coronal needle module 2. The fixed connector 7 is connected and conductive to the fixed end of the external test needle mold. The fixed connector 7 is connected to the symmetrical coronal needle module 2 through the spring rod 1. Therefore, the fixed connector 7 is fixedly installed and is used for communication between the symmetrical coronal needle module 2 and the test module.

[0018] like Figure 2 As shown, in this embodiment, the crown teeth 4 are configured in three groups, and the three groups of crown teeth 4 are evenly arranged at the pressing end of the needle body 3. Therefore, the symmetrical arrangement of the three groups of crown teeth 4 at a specific thickness and width ensures that at least two groups of crown teeth 4 are pressed into contact with the gold fingers, maintaining pressing stability.

[0019] like Figure 3 As shown, in this embodiment, the diameter of the connecting end of the needle body 3 is the same as the diameter of the connecting end of the spring rod 1, and the distance between the two sets of clearance grooves 5 is two-thirds of the diameter of the needle body 3. Therefore, the distance between the two sets of clearance grooves 5, being two-thirds of the diameter of the needle body 3, ensures the overall strength of the needle body 3 while also improving the passability of the symmetrical crown-shaped needle module 2.

[0020] The working principle of this utility model is as follows: Before the equipment is started, the spring rod 1 is connected to the test module through the fixed connector 7. The external lifting mechanism or robot arm drives the test module to position and press the gold finger end of the ultra-small gold finger width flexible flat cable product. The ends of several sets of crown teeth 4 contact and press with several gold finger contact points of the flexible flat cable product, so that the flexible flat cable product is connected and conductive to the test module, and realizes the power-on detection.

[0021] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. A single-acting spring needle suitable for ultra-small gold finger widths, comprising a spring rod (1) and a symmetrical crown-shaped needle tip module (2), characterized in that: The symmetrical crown needle module (2) includes a needle body (3) and crown teeth (4). Several sets of crown teeth (4) are arranged in an array at the pressing end of the needle body (3). The connecting end of the needle body (3) is connected to the elastic movable end of the spring rod (1). The elastic movable end of the spring rod (1) drives the pressing end of several sets of crown teeth (4) to cooperate with the lower needle position of the gold finger of the external product.

2. The single-acting spring pin suitable for ultra-small gold finger width according to claim 1, characterized in that: The crown tooth (4) is in the shape of a triangular truncated pyramid. The bottom of several crown teeth (4) is connected to the pressing end of the needle body (3). The pressing end of the crown tooth (4) is the long linear side of the top of the triangular truncated pyramid structure.

3. A single-acting spring pin suitable for ultra-small gold finger widths according to claim 2, characterized in that: Both sides of the outer edge of the needle body (3) are provided with clearance grooves (5). The two sets of clearance grooves (5) are parallel to each other and the extension direction of the clearance grooves (5) is perpendicular to the extension direction of the pressing end of the crown tooth (4). The two ends of the crown tooth (4) are respectively on the same plane as the two sets of clearance grooves (5).

4. A single-acting spring pin suitable for ultra-small gold finger widths according to claim 1, characterized in that: The two sets of crown teeth (4) form a V-shaped through groove (6) between adjacent surfaces.

5. A single-acting spring pin suitable for ultra-small gold finger widths according to claim 1, characterized in that: A fixed connector (7) is provided at the end of the spring rod (1) away from the symmetrical coronal needle module (2). The fixed connector (7) is connected to the fixed end of the external test needle mold. The fixed connector (7) is connected to the symmetrical coronal needle module (2) through the spring rod (1).

6. A single-acting spring pin suitable for ultra-small gold finger widths according to claim 1, characterized in that: The crown teeth (4) are configured in three groups, and the three groups of crown teeth (4) are evenly arranged at the pressing end of the needle body (3).

7. A single-acting spring pin suitable for ultra-small gold finger widths according to claim 3, characterized in that: The diameter of the connecting end of the needle body (3) is the same as the diameter of the connecting end of the spring rod (1), and the distance between the two sets of clearance grooves (5) is two-thirds of the diameter of the needle body (3).

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