CN216133770U

CN216133770U - Spherical boss contact micro switch

Info

Publication number: CN216133770U
Application number: CN202121987324.0U
Authority: CN
Inventors: 苏晓龙; 吕力; 陈傲杰
Original assignee: Shanghai Aviation Electric Co Ltd
Current assignee: Shanghai Aviation Electric Co Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-03-25
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses a spherical boss contact microswitch which comprises a normally closed terminal, a normally open terminal and a movable contact between the normally closed terminal and the normally open terminal, wherein the movable contact is provided with a first spherical boss part facing the normally closed terminal and a second spherical boss part facing the normally open terminal, the first spherical boss part abuts against the normally closed terminal in the normally closed state of the microswitch, and the second spherical boss abuts against the normally open terminal in the normally open state of the microswitch. The utility model has the beneficial effects that: the contact surfaces of the movable contact and the normally closed terminal and the normally open terminal are designed into spherical boss structures, so that the movable contact and the normally closed terminal and the normally open terminal can be fully contacted and conducted even if tiny foreign matters exist, the contact resistance is reduced, the normal switching and the communication of the contact of the microswitch are not influenced, and the stability and the safety of the switch are improved.

Description

Spherical boss contact micro switch

Technical Field

The utility model relates to a spherical boss contact microswitch.

Background

The microswitch is a switch for quickly connecting or disconnecting a movable contact and a fixed contact. The moving contact and the fixed contact are both planes or cambered surfaces with smaller radians. The microswitch is easy to generate sparks in a power-on state to cause the movable contact (the static contact) to be oxidized to generate tiny foreign matters. When the movable contact (stationary contact) has a small foreign object, the sensitivity and contact stability of the switch are greatly reduced, or the switch is failed, and even a safety accident may be caused in the power-on state.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve various problems in the prior art and provides a novel spherical boss contact microswitch.

In order to achieve the purpose, the technical scheme of the utility model is as follows: a spherical boss contact micro switch comprises a normally closed terminal, a normally open terminal and a movable contact between the normally closed terminal and the normally open terminal, wherein the movable contact is provided with a first spherical boss part facing the normally closed terminal and a second spherical boss part facing the normally open terminal, the first spherical boss part is only abutted against the normally closed terminal under the normally closed state of the micro switch, and the second spherical boss is only abutted against the normally open terminal under the normally open state of the micro switch.

As a preferred scheme of the spherical boss contact microswitch, one of the normally closed terminal and the normally open terminal is positioned above the movable contact, and the other is positioned below the movable contact; the contact spring is characterized by further comprising a spring, wherein the movable end of the spring extends to a position between the normally closed terminal and the normally open terminal, the movable contact is arranged at the movable end of the spring, and the movable end of the spring is displaced along the vertical direction.

As a preferred scheme of the spherical boss contact micro-switch, the micro-switch further comprises a switch base, wherein the normally closed terminal, the normally open terminal and the movable contact are uniformly distributed at one end of the switch base, the support frame is arranged at the other end of the switch base, and the fixed end of the reed is fixed on the support frame.

As a preferred scheme of spherical boss contact micro-gap switch, further include, switch housing has the shift knob of reed top pushes down shift knob to realize the reed expansion end shifts downwards.

Compared with the prior art, the utility model has the beneficial effects that: the contact surfaces of the movable contact and the normally closed terminal and the normally open terminal are designed into spherical boss structures, so that the movable contact and the normally closed terminal and the normally open terminal can be fully contacted and conducted even if tiny foreign matters exist, the contact resistance is reduced, the normal switching and the communication of the contact of the microswitch are not influenced, and the stability and the safety of the switch are improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the movable contact and the spring plate in the utility model.

Fig. 3 is a schematic structural diagram of a normally closed terminal, a normally open terminal and a moving contact in the utility model.

Fig. 4 is a schematic structural diagram of the moving contact in the utility model.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1-3, a ball-boss contact microswitch is shown.

The microswitch is provided with a switch shell 1, a switch base 2, a U-shaped conductive piece 3, a Z-shaped conductive piece 4, a movable contact 5, a reed 6, a reed 7, a support frame 8, a switch button 9 and the like.

The switch housing 1 has a switch button 9 above the reed 6.

The switch base 2 is provided at the left end with the U-shaped conductive member 3, the Z-shaped conductive member 4 and the movable contact 5. The top wall of the U-shaped conductive piece 3 is used as a normally closed terminal. The top wall of the Z-shaped conductive piece 4 is used as a normally open terminal. The reed 6 and the support frame 8 are arranged at the right end of the switch base 2. The support frame 8 serves as a common terminal. The left end of the reed 6 extends to the position between the normally closed terminal and the normally open terminal. The left end of the reed 6 is a movable end. The movable contact 5 is arranged at the left end of the spring 6. The right end of the reed 6

The movable contact 5 has a first spherical boss portion 51 facing the normally closed terminal and a second spherical boss portion 52 facing the normally open terminal. The first spherical boss portion 51 abuts against the normally closed terminal only in the normally closed state of the microswitch. The second spherical boss 52 abuts against the normally open terminal only in the normally open state of the microswitch. In an initial state, the microswitch is normally closed, the first spherical boss part is abutted to the normally closed terminal, and the second spherical boss part is separated from the normally open terminal. If the switch button is pressed, the switch button drives the reed 6 and the movable contact 5 to move downwards, so that the first spherical boss part is separated from the normally closed terminal, and the second spherical boss part is abutted against the normally open terminal, namely the microswitch is normally open.

The contact surfaces of the movable contact 5, the normally closed terminal and the normally open terminal are designed into spherical boss structures, so that the movable contact can be fully contacted and conducted even if tiny foreign matters exist, the contact resistance is reduced, the normal switching and the communication of the contact of the micro switch are not influenced, and the stability and the safety of the switch are improved.

The foregoing merely represents embodiments of the utility model, which are described in greater detail and detail, but are not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A spherical boss contact micro switch is characterized by comprising a normally closed terminal, a normally open terminal and a movable contact between the normally closed terminal and the normally open terminal, wherein the movable contact is provided with a first spherical boss part facing the normally closed terminal and a second spherical boss part facing the normally open terminal, the first spherical boss part only abuts against the normally closed terminal in the normally closed state of the micro switch, and the second spherical boss only abuts against the normally open terminal in the normally open state of the micro switch.

2. The spherical boss contact microswitch of claim 1, wherein one of the normally closed terminal and the normally open terminal is located above the movable contact, and the other is located below the movable contact; the contact spring is characterized by further comprising a spring, wherein the movable end of the spring extends to a position between the normally closed terminal and the normally open terminal, the movable contact is arranged at the movable end of the spring, and the movable end of the spring is displaced along the vertical direction.

3. The spherical boss contact microswitch of claim 2, further comprising a switch base, wherein the normally closed terminal, the normally open terminal and the movable contact are all disposed at one end of the switch base, a support frame is disposed at the other end of the switch base, and the fixed end of the reed is fixed to the support frame.

4. The spherical boss contact microswitch of claim 3 further comprising a switch housing having a switch button above said reed depressed to effect downward displacement of said reed movable end.