Double-end spring needle capable of preventing instant breaking

Abstract

The utility model discloses a double-end spring needle for preventing instant breaking, which relates to the technical field of semiconductor detection and comprises a needle tube, a first accommodating groove and a second accommodating groove are respectively arranged at two ends of the needle tube, a first spring, a steel ball and a first needle shaft are sequentially accommodated in the first accommodating groove from bottom to outside, and a second spring is arranged in the second accommodating groove. A second spring and a second needle shaft are sequentially accommodated in the second accommodating groove from bottom to outside; according to the utility model, no matter how the compressed speed of the first needle shaft and the springback speed of the spring change, the first spring and the steel ball always keep large-area contact, and the contact force is also very large, so that the phenomenon of instantaneous breaking can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor testing technology, specifically a double-ended spring needle designed to prevent instantaneous breakage. Background Technology

[0002] A pogo pin is a precision connector used in electronic products such as mobile phones and is widely used in semiconductor equipment for connection. The structure of a pogo pin typically consists of three parts: a pin shaft, a pin tube, and a spring. The pin shaft and spring are housed inside the pin tube. The pin shaft and spring are held together internally by means of crimping or a method where one end is crimped and the other end is marked with dots, forming a single integrated structure. During use, the pin shaft is compressed into the pin tube, pushing the spring inward. The spring's elasticity then holds the pin shaft in place, ensuring good contact between the pin shaft and the workpiece under test for testing.

[0003] Existing spring needles typically use a direct connection between the needle shaft and the spring. For example, a double-ended spring needle disclosed in CN207572584 U discloses a first needle shaft, a second needle shaft, a first needle tube, a second needle tube, a first elastic element, a second elastic element, and an insulating base. The first needle tube and the second needle tube are disposed opposite each other at both ends of the insulating base. The first needle shaft is disposed inside the first needle tube and slides within it. The second needle shaft is disposed inside the second needle tube and slides within it. One end of the first elastic element and one end of the second elastic element are fixedly connected to the insulating base. The first elastic element is disposed inside the first needle tube, and its other end is fixedly connected to the fixed end of the first needle shaft. The second elastic element is disposed inside the second needle tube, and its other end is fixedly connected to the fixed end of the second needle shaft.

[0004] The above-mentioned technical solution results in a momentary disconnection between the needle shaft and the spring, therefore further structural optimization is required. Utility Model Content

[0005] This utility model discloses a double-ended spring needle to prevent instantaneous breakage, thereby solving the technical problem of instantaneous breakage.

[0006] To solve the above-mentioned technical problems, the present invention proposes the following optimized technical solution:

[0007] A double-ended spring needle with anti-sudden breakage includes a needle tube, with a first receiving groove and a second receiving groove respectively provided at both ends of the needle tube. The first receiving groove contains a first spring, a steel ball and a first needle shaft in sequence from bottom to outside, and the second receiving groove contains a second spring and a second needle shaft in sequence from bottom to outside.

[0008] Furthermore, the diameter of the first receiving groove is the same as the diameter of the second receiving groove.

[0009] Furthermore, the depth of the first receiving groove is greater than the depth of the second receiving groove.

[0010] Furthermore, the diameters of the first spring, the steel ball, and the first needle shaft are the same.

[0011] Furthermore, a limiting groove is provided at one end of the second needle shaft, and the second spring is inserted into the limiting groove.

[0012] Furthermore, a limiting ring is provided on the side of the second needle shaft.

[0013] Furthermore, the diameter of the first spring is larger than the diameter of the second spring.

[0014] Furthermore, the bottom of both the first and second receiving grooves are conical grooves.

[0015] Furthermore, the bottom of the limiting groove is a conical groove shape.

[0016] The present invention has the following advantages over the prior art:

[0017] The double-headed spring needle provided by this utility model uses a first spring, a steel ball, and a first needle shaft connected in sequence. No matter how the speed at which the first needle shaft is pressed and the spring rebound speed change, the first spring and the steel ball always maintain a large contact area and a large contact force, which can avoid the phenomenon of instantaneous breakage. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 1 .

[0019] Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 2 .

[0020] Figure 3 yes Figure 2 Sectional view at point AA.

[0021] In the diagram: 1. Needle tube; 2. First receiving groove; 3. Second receiving groove; 4. First spring; 5. Steel ball; 6. First needle shaft; 7. Second spring; 8. Second needle shaft; 9. Limiting groove; 10. Limiting ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0023] See Figures 1-3 A double-ended spring needle for preventing instantaneous breakage includes a needle tube 1. The two ends of the needle tube 1 are respectively provided with a first receiving groove 2 and a second receiving groove 3. The first receiving groove 2 contains a first spring 4, a steel ball 5 and a first needle shaft 6 in sequence from bottom to outside. The second receiving groove 3 contains a second spring 7 and a second needle shaft 8 in sequence from bottom to outside.

[0024] The needle tube 1 is made of insulating material and is used to carry the needle shaft, spring, and steel ball 5. The first receiving groove 2 and the second receiving groove 3 are not connected. The needle tube 1 separates the first receiving groove 2 and the second receiving groove 3 and the first receiving groove 2 and the second receiving groove 3 are insulated from each other.

[0025] After the first needle shaft 6 is housed in the first receiving groove 2, the first needle shaft 6 is partially restricted in the first receiving groove 2 by means of press riveting and narrowing, so that the first needle shaft 6 will not completely detach from the first receiving groove 2; after the second needle shaft 8 is housed in the second receiving groove 3, the second needle shaft 8 is partially restricted in the second receiving groove 3 by means of press riveting and narrowing, so that the second needle shaft 8 will not completely detach from the second receiving groove 3.

[0026] The surface of steel ball 5 is extremely smooth, possessing very high conductivity and very low resistance. The friction generated during testing is negligible and does not affect the accuracy of semiconductor testing. Steel ball 5 is positioned between the first spring 4 and the first needle shaft 6, making the contact between them smoother. This minimizes the problem of increased friction caused by misalignment during testing. Furthermore, steel ball 5 transforms the original sliding friction into rolling friction, further reducing friction.

[0027] In this embodiment, the diameter of the first receiving groove 2 is the same as the diameter of the second receiving groove 3. That is, the two ends of the needle tube 1 are the same size, and the diameters of the receiving grooves at both ends are also the same.

[0028] In this embodiment, the depth of the first receiving groove 2 is greater than the depth of the second receiving groove 3. The first receiving groove 2 accommodates more components, therefore its depth is greater.

[0029] In this embodiment, the diameters of the first spring 4, the steel ball 5, and the first needle shaft 6 are the same, and they can all be accommodated in the first receiving groove 2, thus avoiding large left-right shaking during the test.

[0030] In this embodiment, a limiting groove 9 is provided at one end of the second needle shaft 8, and the second spring 7 is inserted into the limiting groove 9. This contact method between the first spring 4 and the second needle shaft 8 is more stable.

[0031] In this embodiment, a limiting ring 10 is provided on the side of the second needle shaft 8. The limiting ring 10 is used to increase the diameter of the second needle shaft 8. The limiting ring 10 contacts the inner wall of the second receiving groove 3 to prevent the second needle shaft 8 from sliding out of the second receiving groove 3.

[0032] In this embodiment, the diameter of the first spring 4 is larger than the diameter of the second spring 7. The elasticity of the first spring 4 is less than that of the second spring 7.

[0033] In this embodiment, the bottom of both the first receiving groove 2 and the bottom of the second receiving groove 3 are conical grooves. When the first spring 4 and the second spring 7 are subjected to a large force, the first spring 4 and the second spring 7 tend to slide towards the sharp corner of the conical groove, which helps to alleviate the problem of excessive spring force.

[0034] In this embodiment, the bottom of the limiting groove 9 is a conical groove. When the second spring 7 is subjected to a large force, the second spring 7 tends to slide towards the sharp corner of the conical groove, which helps to alleviate the problem of excessive force on the spring. Example

[0035] This embodiment is another implementation scheme proposed in this application. The difference between this embodiment and Embodiment 1 is that: in this embodiment, two steel balls are provided, which are respectively disposed in the first receiving groove and the second receiving groove, and respectively disposed between the first spring and the first needle shaft, and between the second spring and the second needle shaft. That is, the contact between the second spring and the second needle shaft is also connected by steel balls, and the contact between the second spring and the second needle shaft also has the function of preventing instantaneous breakage.

[0036] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An anti-instantaneous-break dual-head spring needle, characterized in that, The device includes a needle tube, with a first receiving groove and a second receiving groove respectively provided at both ends of the needle tube. The first receiving groove contains a first spring, a steel ball and a first needle shaft in sequence from bottom to outside. The second receiving groove contains a second spring and a second needle shaft in sequence from bottom to outside. One end of the second needle shaft is provided with a limiting groove, and the second spring is inserted into the limiting groove. A limiting ring is provided on the side of the second needle shaft.

2. The dual spring needle of claim 1, wherein, The diameter of the first receiving groove is the same as the diameter of the second receiving groove.

3. The dual spring needle of claim 1, wherein, The depth of the first receiving groove is greater than the depth of the second receiving groove.

4. The dual spring needle of claim 1, wherein, The diameters of the first spring, the steel ball, and the first needle shaft are the same.

5. The anti-instantaneous break dual-head spring needle according to claim 1, wherein, The diameter of the first spring is larger than the diameter of the second spring.

6. The dual spring needle of claim 1, wherein, The bottom of both the first and second receiving grooves are conical grooves.

7. The dual spring needle of claim 1, wherein the needle is configured to prevent the needle from being disconnected from the connector by a force of less than 0.5 lbs. The bottom of the limiting groove is a conical groove shape.

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