Novel spring exposed probe with clamping structure

Abstract

The utility model discloses a novel spring exposed probe with a clamping structure, which comprises a probe head part, a spring part and a probe tail part, the probe head part is provided with a probe tip part, a clamping structure and a probe shaft, the probe tail part is provided with a clamping part and a probe tube, the clamping structure is arranged between the probe tip part and the probe shaft and is used for clamping the spring part, and the clamping structure is used for clamping the spring part. The clamping structure sequentially comprises a second boss, a first boss and a third boss from the portion close to the needle point, the height size of the second boss and the height size of the third boss are both smaller than the height size of the first boss, an arc-shaped transition area is arranged on the outer surface of the first boss, the highest arc point of the arc-shaped transition area is close to the second boss, and the highest arc point of the arc-shaped transition area is close to the third boss. The lowest point of the arc is close to the third boss, and the closing opening of the spring part forms partial clearance fit and partial interference fit on the arc-shaped transition area of the first boss. According to the clamping structure, the size requirement is reduced, the machining difficulty is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel coil transportation technology, specifically to a novel spring-exposed probe with a locking structure. Background Technology

[0002] Spring probes are precision connectors used in electronic products such as mobile phones, communications, automobiles, medical devices, and aerospace. Exposed spring probes, as a type of spring probe, typically consist of a needle head, a spring, and a needle tail, with the needle head and tail connected by the spring. During use, the needle head is compressed by the component, which in turn compresses the spring. Under the spring's thrust, the needle head can move axially along the needle tail. The outer surface of the needle head contacts the inner surface of the needle tail, and an electrical signal is transmitted from the needle shaft of the needle head to the needle tube of the needle tail. This allows for rapid detection of faulty components or assemblies, accurate location of defects, and defect classification.

[0003] Most existing spring-exposed probe structures use clearance fit and interference fit locking structures. The advantage is that they are not easy to fall off after assembly. The disadvantage is that they have high requirements for the inner diameter of the spring and the outer diameter of the needle locking, resulting in a relatively low assembly yield. If the interference is too large, the spring will deform during the pressing process, resulting in poor straightness of the finished product or failure to be installed. If the interference is too small, there is a risk of falling off. Moreover, during the assembly process, the spring is subjected to a sudden increase in resistance when the interference is applied, which can easily cause the spring to bend, resulting in poor straightness of the probe after assembly. Utility Model Content

[0004] To overcome the aforementioned problems, the purpose of this utility model is to provide a novel spring-exposed probe with a locking structure, which can reduce the size requirements of the locking structure components and significantly improve the straightness of the assembled product.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a novel spring-exposed probe with a locking structure, comprising a needle head, a spring portion, and a needle tail portion. The needle head is provided with a needle tip, a locking structure, and a needle shaft. The needle tail portion is provided with a locking part and a needle tube. The locking structure is disposed between the needle tip and the needle shaft for locking the spring portion. The locking structure includes a second boss, a first boss, and a third boss in sequence near the needle tip portion. The height dimensions of the second boss and the third boss are both smaller than the height dimension of the first boss. The outer surface of the platform is provided with an arc-shaped transition area, with the highest point of the arc close to the second boss and the lowest point close to the third boss. The constriction of the spring part forms a partial clearance fit and a partial interference fit on the arc-shaped transition area of ​​the first boss. During the assembly pressing process, the resistance generated by the interference fit is small and gradual. This not only reduces the requirements for the positioning structure size of the needle head and the inner diameter size of the constriction of the spring part, but also reduces the resistance experienced by the spring part during the interference fit. During the pressing process, it is not easy to over-pressurize and cause the spring part to bend, thus ensuring the straightness of the product.

[0006] Preferably, the second boss and the third boss have the same height, which facilitates processing.

[0007] Preferably, the needle head passes through the spring part and is inserted into the needle tail part, the needle shaft is inserted into the needle tube, and the ends of the spring part are respectively engaged with the locking structure and the locking part, so that the needle head, spring part and needle tail part do not fall apart after being connected.

[0008] Preferably, the diameter of the highest point of the arc of the first boss is larger than the inner diameter of the constriction of the spring portion, the diameter of the lowest point of the arc of the first boss is smaller than the inner diameter of the constriction of the spring portion, the diameters of the second boss and the third boss are smaller than the inner diameter of the constriction of the spring portion, the highest point of the arc and the inner diameter of the constriction of the spring portion form the maximum interference fit area, the lowest point of the arc and the inner diameter of the constriction of the spring portion form the maximum clearance fit area, and the second boss and the third boss and the inner diameter of the constriction of the spring portion are both clearance fits, thus reducing the interference fit requirement.

[0009] The beneficial effects of this invention are: the improved probe can reduce the size requirements of the locking structure components of the probe head, that is, reduce the interference requirement, reduce the difficulty of processing, reduce the production cost, and at the same time greatly improve the straightness of the assembled product and improve the production yield; and it can also make the product consistent and the resistance stable, reducing the risk of inconsistent stability of different batches of probes at the application end. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the assembled structure in this embodiment;

[0011] Figure 2This is an exploded view diagram of this embodiment;

[0012] Figure 3 This is a schematic diagram of the needle head structure in this embodiment;

[0013] Figure 4 This is a three-dimensional structural diagram of the needle head in this embodiment.

[0014] In the diagram: 1. Needle head; 11. Needle tip; 12. Locking structure; 121. First boss; 122. Second boss; 123. Third boss; 124. Arc-shaped transition area; 13. Needle shaft; 2. Spring part; 3. Needle tail; 31. Locking part; 32. Needle tube. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0016] See Figures 1-4 This embodiment discloses a novel spring-exposed probe with a locking structure, comprising a needle head 1, a spring portion 2, and a needle tail 3. The needle head 1 is provided with a needle tip 11, a locking structure 12, and a needle shaft 13. The needle tail 3 is provided with a locking portion 31 and a needle tube 32. The needle head 1 passes through the spring portion 2 and is inserted into the needle tail 3. The needle shaft 13 is inserted into the needle tube 32. The constricted ends of the spring portion 2 are respectively locked with the locking structure 12 and the locking portion 31, so that the needle head 1, spring portion 2, and needle tail 3 do not fall apart after being connected. The locking structure 12 is disposed between the needle tip 11 and the needle shaft 13 for locking the spring portion 2. The locking structure 12 includes a second boss 122, a first boss 121, and a third boss 123 in sequence near the needle tip 11. The second boss 122... 2. The height of the first boss 121 is the same as that of the third boss 123. The height of the second boss 122 and the third boss 123 is smaller than that of the first boss 121. The outer surface of the first boss 121 is provided with an arc-shaped transition area 124. The highest point of the arc is close to the second boss 122, and the lowest point of the arc is close to the third boss 123. The constriction of the spring part 2 forms a partial clearance fit and a partial interference fit on the arc-shaped transition area 124 of the first boss 121. The diameter of the highest point of the arc of the first boss 121 is larger than the inner diameter of the constriction of the spring part 2. The diameter of the lowest point of the arc of the first boss 121 is smaller than the inner diameter of the constriction of the spring part 2. The diameters of the second boss 122 and the third boss 123 are smaller than the inner diameter of the constriction of the spring part 2.

[0017] With the same diameter as the first boss in the prior art, the interference fit area in the prior art is wider than the interference fit area in this embodiment. When the spring part is pressed in this embodiment, the resistance experienced by the spring part is much smaller than that experienced in the prior art. This ensures that the spring part will not be over-pressurized, causing the spring to bend, thus ensuring the straightness of the assembled product.

[0018] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A novel spring-exposed probe with a locking structure, comprising a needle head, a spring portion, and a needle tail portion, wherein the needle head is provided with a needle tip, a locking structure, and a needle shaft, and the needle tail portion is provided with a locking portion and a needle tube, characterized in that, The locking structure is disposed between the needle tip and the needle shaft for locking the spring part. The locking structure includes a second boss, a first boss, and a third boss in sequence near the needle tip. The height of the second boss and the third boss is smaller than the height of the first boss. The outer surface of the first boss is provided with an arc-shaped transition area, with the highest point of the arc close to the second boss and the lowest point close to the third boss. The constriction of the spring part forms a partial clearance fit and a partial interference fit on the arc-shaped transition area of ​​the first boss.

2. The novel spring-exposed probe with a locking structure according to claim 1, characterized in that, The second boss and the third boss have the same height.

3. The novel spring-exposed probe with a locking structure according to claim 1, characterized in that, The needle head passes through the spring part and is inserted into the needle tail. The needle shaft is inserted into the needle tube. The two ends of the spring part are respectively locked with the locking structure and the locking part, so that the needle head, spring part and needle tail are connected and do not fall apart.

4. The novel spring-exposed probe with a locking structure according to claim 1, characterized in that, The diameter of the highest point of the first boss's arc is greater than the inner diameter of the spring portion's opening, the diameter of the lowest point of the first boss's arc is less than the inner diameter of the spring portion's opening, and the diameters of the second and third bosses are less than the inner diameter of the spring portion's opening.

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