CN201146273Y - spring-loaded contact probe - Google Patents

Abstract

The utility model relates to the technical field of probe type connectors, in particular to a spring type contact probe, which comprises an inner tube, a spring and a needle shaft connected with the inner tube, wherein the inner tube is provided with a blind hole, the spring is arranged in the blind hole, the end surface at the bottom of the needle shaft is an inclined plane, one end of the spring is contacted with the inclined plane at the bottom of the needle shaft, and the other end is contacted with the bottom of the blind hole of the inner tube; needle axle one end is equipped with a spacing step, and in the blind hole of inner tube was inserted to the one end that the needle axle was equipped with spacing step, as an organic whole with inner tube, spring riveting, because establish to the inclined plane in the bottom of needle axle for the needle axle can take place the slope when the action, the area of contact of increase and inner tube, and then reduces the resistance between needle axle and the inner tube, increases the stability of connector conduction.

Description

spring-loaded contact probe

Technical field:

The utility model relates to the technical field of probe type connectors, in particular to a spring type contact probe.

Background technique:

With the development of science and technology, digital products come out one after another. Portable devices such as digital cameras, digital video cameras, and mobile phones have been widely used. Most of the power sources used by such portable devices are rechargeable batteries. Therefore, rechargeable batteries are also widely used. application. The battery and the electrical equipment are generally contacted through a connector. The commonly used connectors generally include a needle shaft, an inner tube and a spring. Contact, the needle shaft is riveted together with the inner tube and the spring, and the needle shaft can move vertically up and down under the action of external force and spring. When in use, the needle shaft is directly in contact with the power supply for power transmission. Generally, mobile phone connectors require a low resistance value of the connector. The resistance value of the connector is not only related to the material used, but also related to the connection between the needle shaft and the inner tube. The contact area is directly related, and the resistance value is inversely proportional to the contact area between the needle shaft and the inner tube, that is, the larger the contact area, the lower the resistance value. The needle shaft of the existing connector moves vertically up and down under the action of the spring, and the The contact area between the shaft and the inner tube is small, so the resistance value is large and unstable.

Utility model content:

The purpose of this utility model is to provide a spring-type contact probe for the shortcomings of the existing technology, which overcomes the shortcomings of the existing connector, such as the small contact area between the needle shaft and the inner tube, and the large resistance value, so that the power transmission is more stable .

In order to achieve the above purpose, the technical solution adopted by the utility model is: the spring type contact probe includes an inner tube, a spring, and a needle shaft connected with the inner tube, the inner tube is provided with a blind hole, and the spring is installed in the blind hole, The end surface of the bottom of the needle shaft is a slope, one end of the spring is in contact with the slope at the bottom of the needle shaft, and the other end is in contact with the bottom of the blind hole of the inner tube; one end of the needle shaft is provided with a limit step, and the end of the needle shaft with the limit step is inserted into the inner tube In the blind hole, it is riveted together with the inner tube and the spring.

The end surface of the exposed end of the needle shaft is spherical.

The beneficial effect of the utility model is: because the bottom of the needle shaft is set as a slope, the needle shaft will be inclined when it moves, increasing the contact area with the inner tube, thereby reducing the resistance between the needle shaft and the inner tube, Increase the stability of connector conduction.

Description of drawings:

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is a cross-sectional view along line A-A of Fig. 2 .

Detailed ways:

As shown in Figures 1, 2, and 3, the utility model includes an inner tube 1, a spring 2, and a needle shaft 3 connected to the inner tube 1. The inner tube 1 is provided with a blind hole 11, and the spring 2 is installed in the blind hole 11. Inside, the end face of the bottom of the needle shaft 3 is a bevel 31, one end of the spring 2 is in contact with the bevel 31 at the bottom of the needle shaft 3, and the other end is in contact with the bottom of the blind hole 11 of the inner tube 1; one end of the needle shaft 3 is provided with a limit step 32, and the needle One end of the shaft 3 provided with a limit step 32 is inserted into the blind hole 11 of the inner tube 1, and is riveted together with the inner tube 1 and the spring 2. The bottom of the bottom is set as a bevel 31, so that the needle shaft 3 will be inclined when it moves, increasing the contact area with the inner tube 1, thereby reducing the resistance between the needle shaft 3 and the inner tube 1, and increasing the stability of the connector conduction sex.

The above-described embodiments are only preferred examples of the utility model, and are not used to limit the scope of implementation of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent scope , should be included in the utility model patent application scope.

Claims (2)

1. The spring-type contact probe includes an inner tube, a spring, and a needle shaft connected to the inner tube. The inner tube is provided with a blind hole, and the spring is installed in the blind hole. It is characterized in that the bottom end surface of the needle shaft is an inclined plane, One end of the spring is in contact with the slope at the bottom of the needle shaft, and the other end is in contact with the bottom of the blind hole of the inner tube; one end of the needle shaft is provided with a limit step, and the end of the needle shaft with the limit step is inserted into the blind hole of the inner tube, and the inner tube , spring riveted as a whole. 2. The spring-type contact probe according to claim 1, wherein the end surface of the exposed end of the needle shaft is spherical.

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