CN206388874U - A kind of corrosion-resistant and low-impedance spring probe - Google Patents

Abstract

The utility model discloses a corrosion-resistant and low-impedance spring probe, which comprises a needle shaft, a needle tube and a spring. The needle tube includes a first tube body and a second tube body; a conduction hole is formed in the first tube body along its axial direction. , the conduction hole runs through both ends of the first pipe body; a blind hole is formed in the second pipe body along its axial direction; the second pipe body is placed outside the bottom end of the first pipe body, and the conduction hole communicates with the blind hole to form An accommodating space; the first tube is sheathed outside the needle shaft; the spring is installed in the accommodating space, one end of which is connected to the tail of the needle shaft, and the other end is connected to the bottom of the blind hole of the second tube. In the utility model, the needle tube adopts a separate structure design, and the second tube body at the bottom is made of stainless steel with good corrosion resistance, and the first tube body at the top is made of brass with good electrical conductivity , so that the electrolytic performance can be improved while greatly improving the corrosion resistance performance, which can meet the needs of high-current charging and has a broad market prospect.

Description

A corrosion-resistant and low-impedance spring probe

technical field

The utility model relates to the technical field of electronic connectors, in particular to a corrosion-resistant and low-impedance spring probe.

Background technique

Spring probe, also known as Pogo pin, also known as antenna thimble, probe, and thimble, is a precision connector used in electronic products such as mobile phones and smart watches. It is widely used between antennas, batteries, etc. and the motherboard The connection function is to solve the purpose of connection that cannot be completed with shrapnel or other connectors for customers. Pogo pin has stable performance during use, high contact performance, and wide range of connection uses. It is the first choice for connectors.

At present, the Pogo pin is mainly composed of three parts, namely the needle shaft, the spring and the needle tube. The needle shaft is riveted together with the spring and the needle tube. The needle tube is usually a one-piece structure and made of brass. It has the following defects: Since the needle tube is made of brass, its corrosion resistance is poor. Therefore, when the spring probe is applied to wearable devices such as smart watches, the needle tube is often corroded by sweat or other substances, which makes the spring probe prone to electrolysis during charging. unpleasant sight.

Utility model content

The purpose of the utility model is to provide a corrosion-resistant and low-impedance spring probe, which avoids poor electrolysis during the charging process due to the needle tube being easily corroded.

For this purpose, the utility model adopts the following technical solutions:

A corrosion-resistant and low-impedance spring probe includes a needle shaft, a needle tube and a spring, and the needle tube includes a first tube body and a second tube body;

A through hole is formed in the first tube body along its axial direction, and the through hole runs through both ends of the first tube body; a blind hole is formed in the second tube body along its axial direction; the second tube body has a blind hole formed along its axial direction; The pipe body is placed outside the bottom end of the first pipe body, and the conduction hole communicates with the blind hole to form an accommodating space;

The needle shaft includes a head and a tail in an integrated structure; the first tube body is sleeved on the outside of the needle shaft, and the tail of the needle shaft is located inside the accommodating space, and the head extends out of the accommodating space;

The spring is installed inside the accommodating space for connecting the needle shaft to the second tube body, one end of which is connected to the tail of the needle shaft, and the other end is connected to the bottom of the blind hole of the second tube body.

Optionally, the second pipe body is specifically a stainless steel pipe body.

Optionally, the first pipe body is specifically a stainless steel pipe body.

Optionally, the first pipe body is specifically a brass pipe body.

Optionally, a gold-plated layer is provided on the outer surface of the first tube.

Optionally, the outer surface of the first pipe body is further provided with an interference structure, and when the second pipe body is sleeved outside the bottom end of the first pipe body, the interference structure is in contact with the inner wall of the second pipe body. conflict.

Optionally, the needle shaft is also provided with a limit step, which is located at the junction of the head and the tail.

Optionally, the end face of the tail of the needle shaft is a plane.

Optionally, the end face of the tail of the needle shaft is a bevel.

Optionally, the end surface of the head of the needle shaft is a spherical surface.

The beneficial effects of the utility model:

In the spring probe provided by the embodiment of the utility model, the needle tube adopts a separate structure design, and the second tube body part at the bottom is made of stainless steel with good corrosion resistance, and the first tube body part at the upper part is made of stainless steel The brass material with good electrical conductivity greatly improves the corrosion resistance while improving the electrolytic performance, which meets the needs of high-current charging and has broad market prospects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is the overall cross-sectional view of the corrosion-resistant and low-impedance spring probe provided by the embodiment of the present invention;

Fig. 2 is an exploded view of the corrosion-resistant and low-impedance spring probe provided by the embodiment of the present invention;

Illustration: needle shaft 1, needle tube 2, spring 3, head 11, tail 12, limit step 13, first tube body 21, second tube body 22, conduction hole 211, interference structure 212, blind hole 221 .

detailed description

In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the utility model embodiment will be clearly and completely described below in conjunction with the accompanying drawings in the utility model embodiment, Apparently, the embodiments described below are only some of the embodiments of the present utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

Embodiment one

As shown in Figure 1 and Figure 2, in this embodiment, the spring probe includes: a needle shaft 1, a needle tube 2, and a spring 3; the spring 2 is installed inside the needle tube 2, the needle tube 2 is sleeved outside the needle shaft 1 and One end of 1 protrudes outside, and the needle shaft 1 and the needle tube 2 are connected by a spring 3, and the spring 3 can perform telescopic movement along the axial direction of the needle tube 2.

Wherein, the needle tube 2 adopts a separate structure, including a first tube body 21 and a second tube body 22 . A through hole 211 is formed in the first pipe body 21 along its axial direction, and the through hole 211 runs through both ends of the first pipe body 21; a blind hole 221 is formed in the second pipe body 22 along its axial direction. The diameter of the hole 221 is larger than the diameter of the via hole 211 . The second tube body 22 is fixedly sleeved outside the bottom end of the first tube body 21 to serve as a bottom tube. At this time, the through hole 211 communicates with the blind hole 221 to form an accommodating space.

The outer surface of the first pipe body 21 is also provided with an interference structure 212. When the first pipe body 21 and the second pipe body 22 are assembled into one body, the interference structure 212 generates friction with the inner wall of the second pipe body 22 to prevent the two The tube bodies are separated from each other to increase the stability of the assembly.

The needle shaft 1 includes a head 11 and a tail 12 in an integral structure; the first tube body 21 is sleeved on the outside of the needle shaft 1, and the tail 12 of the needle shaft 1 is located inside the conduction hole 211, and the head 11 extends out of the guide. outside the through hole 211 .

In order to facilitate installation, so that the head 11 of the needle shaft 1 can protrude from the needle tube 2 without completely sliding out, the connection between the head 11 and the tail 12 is also provided with a limit step 13, so that when the head 11 extends out of the needle tube 2 Tail 12 is stuck inside needle tube 2 .

The spring 3 is installed inside the accommodation space formed by the conduction hole 211 and the blind hole 221, and is used to connect the needle shaft 1 with the second tube body 21, one end of which is connected to the tail portion 12 of the needle shaft 1, and the other end is connected to the second tube body 21. The bottom of the blind hole 221 of the second pipe body 21.

When in use, the needle tube 2 is electrically connected to the corresponding electrode, and then the head 11 of the needle shaft 1 is inserted into the connector, and the spring 3 contracts at this time, so that the head 11 of the needle shaft 1 corresponds to the contact in the connector Stable contact. When a slight vibration occurs, the spring 3 will contract or expand accordingly so that the head 11 of the needle shaft 1 is always in stable contact with the contacts, thereby ensuring smooth conduction of the circuit.

In order to achieve good corrosion resistance, the second pipe body 22 is made of a strong corrosion-resistant material, specifically stainless steel, and the first pipe body 21 can be made of various conductive metal materials, which are not limited.

In application, under normal circumstances, the bottom of the needle tube 2 is easily corroded by contact with corrosive substances, but in this embodiment, the needle tube 2 adopts a separate structure, and the second tube body 22 as the bottom tube adopts a strong corrosion-resistant Moreover, the conductive stainless steel material makes the needle tube 2 greatly improve the corrosion resistance on the basis of realizing conductivity.

Embodiment two

In this embodiment, the corrosion-resistant spring probe includes: a needle shaft 1 , a needle tube 2 , and a spring 3 .

Wherein, the needle tube 2 adopts a separate structure, including a first tube body 21 and a second tube body 22 . A through hole 211 is formed in the first pipe body 21 along its axial direction, and the through hole 211 runs through both ends of the first pipe body 21; a blind hole 221 is formed in the second pipe body 22 along its axial direction. The diameter of the hole 221 is larger than the diameter of the via hole 211 . The second tube body 22 is fixedly sleeved outside the bottom end of the first tube body 21 to serve as a bottom tube. At this time, the through hole 211 communicates with the blind hole 221 to form an accommodating space.

The outer surface of the first pipe body 21 is also provided with an interference structure 212. When the first pipe body 21 and the second pipe body 22 are assembled into one body, the interference structure 212 generates friction with the inner wall of the second pipe body 22 to prevent the two The tube bodies are separated from each other to increase the stability of the assembly.

The needle shaft 1 includes a head 11 and a tail 12 in an integral structure; the first tube body 21 is sleeved on the outside of the needle shaft 1, and the tail 12 of the needle shaft 1 is located inside the conduction hole 211, and the head 11 extends out of the guide. outside the through hole 211 .

The spring 3 is installed inside the accommodation space formed by the conduction hole 211 and the blind hole 221, and is used to connect the needle shaft 1 with the second tube body 21, one end of which is connected to the tail portion 12 of the needle shaft 1, and the other end is connected to the second tube body 21. The bottom of the blind hole 221 of the second pipe body 21.

In order to achieve good corrosion resistance, the second pipe body 22 is made of a strong corrosion-resistant material, specifically stainless steel.

At the same time, in order to achieve low resistance, the first tube body 21 is made of a conductive metal material with good electrical conductivity, specifically brass, and its outer surface is plated with gold.

In order to achieve a good power conduction effect, it is generally required that the resistance value generated by the spring probe should be as small as possible. Therefore, this embodiment 2 is improved on the basis of the embodiment 1, and the first tube body 21 is designated to use a good The conductive brass gold-plated material enables the spring probe to achieve good corrosion resistance while reducing impedance, meeting the application requirements of high-current charging.

Embodiment three

In order to achieve a good power conduction effect, it is usually required that the resistance value generated by the spring probe be as small as possible, and the resistance value of the spring probe is not only related to the material used, but also related to the needle shaft 1 and the needle tube 2. There is a direct relationship between the contact area, and the resistance value is inversely proportional to the contact area.

Therefore, in this embodiment, the corrosion-resistant spring probe includes: a needle shaft 1 , a needle tube 2 , and a spring 3 .

The needle tube 2 adopts a separate structure, including a first tube body 21 and a second tube body 22 . A through hole 211 is formed in the first pipe body 21 along its axial direction, and the through hole 211 runs through both ends of the first pipe body 21; a blind hole 221 is formed in the second pipe body 22 along its axial direction. The diameter of the hole 221 is larger than the diameter of the via hole 211 . The second tube body 22 is fixedly sleeved outside the bottom end of the first tube body 21 to serve as a bottom tube. At this time, the through hole 211 communicates with the blind hole 221 to form an accommodating space.

The needle shaft 1 includes a head 11 and a tail 12 in an integral structure; the first tube body 21 is sleeved on the outside of the needle shaft 1, and the tail 12 of the needle shaft 1 is located inside the conduction hole 211, and the head 11 extends out of the guide. outside the through hole 211 .

The end surface of the head 11 adopts a spherical design to ensure point-to-point contact between the head 11 and the contacts; the end surface of the tail 12 adopts a bevel design, so that the needle shaft 1 is inclined during the movement, and the needle shaft 1 and the first tube body are enlarged. 21 contact area, reducing impedance and improving conduction performance.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still can Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model .

Claims (10)

1. a kind of corrosion-resistant and low-impedance spring probe, including needle shaft, needle tubing and spring, it is characterised in that the needle tubing Including the first body and the second body；

In first body, via hole is axially formed along it, the via hole runs through the two ends of the first body；Second pipe In vivo, blind hole has been axially formed it along it；Second body is placed on outside the bottom of the first body, and via hole is communicated with blind hole Form an accommodation space；

The needle shaft includes head and afterbody；First body is sheathed on the outside of needle shaft, and needle shaft afterbody be located at it is accommodating Interior volume, head are stretched out outside accommodation space；

The spring is installed in inside the accommodation space, and its one end is connected to the afterbody of needle shaft, and the other end is connected to the second pipe The bottom of the blind hole of body.

2. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that second body is specific For stainless steel body.

3. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that first body is specific For stainless steel body.

4. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that first body is specific For brass body.

5. according to claim 4 corrosion-resistant and low-impedance spring probe, it is characterised in that the first body appearance Face is provided with Gold plated Layer.

6. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that outside first body Surface is additionally provided with interference structure, when second body is placed on outside the bottom of the first body, the interference structure and second The inwall of body is inconsistent.

7. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that be additionally provided with the needle shaft Limited step, positioned at the head and the junction of afterbody.

8. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that the afterbody of the needle shaft End face is plane.

9. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that the afterbody of the needle shaft End face is inclined-plane.

10. according to claim 1 corrosion-resistant and low-impedance spring probe, it is characterised in that the head of the needle shaft End face be Surface of Sphere.