CN201149919Y - spring-loaded contact probe - Google Patents

Abstract

The utility model relates to the technical field of probe type connectors, and in particular to a spring type contact probe, which comprises an inner tube, a spring, and a needle shaft connected to the inner tube. The inner tube is provided with a blind hole, the spring is installed in the blind hole, the bottom end face of the needle shaft is an inclined surface, one end of the spring contacts the inclined surface of the bottom of the needle shaft, and the other end contacts the bottom of the blind hole of the inner tube. Two limiting steps are provided at one end of the needle shaft, and a limiting area for limiting the upward and downward movement of the needle shaft is formed between the two limiting steps. A limiting flange is provided on the inner wall of the inner tube, and the limiting flange is located in the limiting area of the needle shaft. Because the bottom of the needle shaft is provided with an inclined surface, the needle shaft will tilt when it moves, thereby increasing the contact area with the inner tube, thereby reducing the resistance between the needle shaft and the inner tube, and increasing the stability of the 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 an inclined plane, one end of the spring is in contact with the inclined plane 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. In the limit area for restricting the up and down movement of the needle shaft, a limit flange is provided on the inner wall of the inner tube, and the limit flange is located in the limit area of the needle shaft.

The limiting flange is a continuous annular flange formed on the inner wall of the inner tube.

The limiting flange is an intermittent raised point formed on the inner wall of the inner tube.

The end face 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 the connector conduction; in addition, the limit of the needle shaft's up and down movement can be realized by setting a step on the needle shaft and a flange on the inner wall of the inner tube. It is realized by dotting, and adopting this structure makes the manufacturing process of the utility model simpler, improves production efficiency, saves cost, and is convenient for industrialized large-scale production.

Description of drawings:

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

Fig. 2 is the front view of the utility model embodiment 1;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the three-dimensional structure schematic diagram of the utility model embodiment 2;

Fig. 5 is the front view of the utility model embodiment 2;

Fig. 6 is a B-B sectional view of Fig. 5 .

Detailed ways:

See shown in Fig. 1,2,3, this is embodiment 1 of the present utility model, and it comprises interior tube 1, spring 2, the needle shaft 3 that is connected with interior tube 1, and interior tube 1 offers blind hole 11, and spring 2 is installed in the blind hole 11, the end surface of the bottom of the needle shaft 3 is a slope 31, one end of the spring 2 is in contact with the slope 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, the needle shaft 3 One end is provided with two limit steps 32, and a limit area 33 is formed between the two limit steps 32 to limit the vertical movement of the needle shaft 3. The inner wall of the inner tube 1 is provided with a limit flange 12, and the limit flange 12 is located in the limiting area 33 of the needle shaft 3, the limiting flange 12 is a continuous annular flange formed on the inner wall of the inner tube 1, and the annular flange can be formed by rolling grooves on the outer wall of the inner tube 1, so The end surface of the exposed end of the above-mentioned needle shaft 3 is a spherical shape, because the bottom of the needle shaft 3 is provided with a slope 31, so that the needle shaft 3 will be inclined when it moves, and the contact area with the inner tube 1 will be increased, thereby reducing the needle shaft 3. The resistance between the shaft 3 and the inner tube 1 increases the stability of the connector conduction.

As shown in Figures 4, 5 and 6, this is Embodiment 2 of the present utility model. The difference from Embodiment 1 is that in this embodiment, the limiting flange 12 is formed by the inner wall of the inner tube 1. Intermittent bumps, the intermittent bumps can be formed by dotting the outer wall of the inner tube 1, and the number of dots can be uniformly set to four or more along the circumferential direction. Other structures are the same as in Embodiment 1 and will not be repeated here.

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 (4)

1. spring contact probe, comprise interior pipe, spring, the needle shaft that is connected with interior pipe, interior pipe offers blind hole, spring is installed in this blind hole, it is characterized in that: the needle shaft bottom end face is the inclined-plane, spring one end contacts with the inclined-plane of needle shaft bottom, the blind hole bottom connection of the other end and interior pipe touches, described needle shaft one end is provided with two limited steps, form the up and down spacing zone of a restriction needle shaft between two limited steps, the inwall of interior pipe is provided with defining flange, and this defining flange is positioned at the spacing zone of needle shaft.

2. spring contact probe according to claim 1 is characterized in that: described defining flange is the continuous circular shape flange that inner tube wall forms.

3. spring contact probe according to claim 1 is characterized in that: described defining flange is the interruption salient point that inner tube wall forms.

4. spring contact probe according to claim 1 is characterized in that: the end face of described needle shaft exposed junction is a ball face shape.

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