Universal micro switch with forced separation

Abstract

The invention discloses a universal micro switch with a forced separation function. The universal micro switch comprises a normally-closed connector, a movable contact spring, an elastic part and a press button, and also comprises a forced separation part, wherein one end of the forced separation part is mounted on a shell through a rotating shaft, and the other end of the forced separation part abuts against the movable contact spring; and the normally-closed connector and the movable contact spring are separated through linkage of the press button in a forced manner. The press button is usedfor triggering the elastic part and the movable contact spring, and after a switching position of the switch is reached, the forced separation part is triggered in a linkage manner, so that the separation of the normally-closed connector and the movable contact spring is guaranteed. Compared with the prior art, the switch is additionally provided with the forced separation part so as to realize the forced separation function, safer and more reliable application of the switch in the industry is guaranteed, and the universal micro switch has wide application prospects.

Description

technical field [0001] The invention belongs to a micro switch, in particular to a universal micro switch with forced separation. Background technique [0002] The micro switches on the existing market are equivalent to standard parts used in the market, and all micro switches are basically unable to achieve forced separation. The reasons are as follows: [0003] 1. The overall structural size of the micro switch is small, the internal space of the switch is small, and the components in the internal space are compact. When the size of the switch installation hole remains unchanged, the switch cannot be enlarged, and it is basically difficult to add additional forced separation parts. [0004] 2. Most of the micro switches are self-resetting by extension springs, reeds or integral shrapnel. In the initial state, the contacts on the movable contact piece of the switch are usually in contact with the contacts on the normally closed connector. The rocker movement mode is used t...

AI Technical Summary

Problems solved by technology

[0004] 2. Most of the micro switches are self-resetting by extension springs, reeds or integral shrapnel. In the initial state, the contacts on the movable contact piece of the switch are usually in contact with the contacts on the normally closed connector. The rocker movement mode is used to realize the forced separation of the switch. When the contact on the movable contact piece contacts the contact on the normally closed connector at the top, one end of the forced separation part moves downward around the fulcrum when the button is pressed down, and the other end of the forced separation part moves The direction is upward, and the forced separation can only be forced to separate when it acts on the moving contact piece downwards. Therefore, the movement direction of the other end of the forced separation is upward and does not work, which also makes it difficult for the micro switch to realize the forced separation function.

[0005] 3. The internal elastic parts of the micro switch mostly use tension springs. The reed or integral shrapnel triggers the switch to turn on and off. The switching action and reset are all completed by the elastic parts. The elasticity of the elastic parts is generally relatively small. The forced separation part cannot be reset by itself, and it needs to be reset by the elastic force of the switch shrapnel, but the elastic force of the elastic part of the micro switch is generally too small, and additional force is required to force the separation part to reset, which increases the burden on the elastic part and easily affects the switching characteristics. , the switch elastic attenuation, severe cases can lead to switch action failure, if the switch is installed in a vibrating environment, the vibration of the forced separation part is also likely to cause problems

[0006] 4. When the micro switch adopts reed or integral shrapnel, because the wall thickness of the moving contact piece itself is thin and elastic, when the forced separation part acts on the elastic moving contact piece, because the action stroke of the micro switch is relatively short, the moving The elastic deformation of the contact piece offsets the function of the forced separation part, which will cause the forced separation part to not work. To solve this problem, the total stroke of the switch needs to be increased, but the limited space of the micro switch does not allow any further increase of the stroke, otherwise the switch will become non-standard. Switch, even if it is allowed to increase the total stroke of the switch, because most of the micro switches are reset by the reed or integral shrapnel, the increase of the total stroke will cause the moving contact piece to fall out of the groove and the switch will not be able to operate

Even if the moving contact piece does not fall off, because the gap between the moving and static contacts of the micro switch is relatively small, when the switch contact is forced to separate and acts on the elastic moving contact piece with a large stroke, it is easy to cause permanent deformation of the moving contact piece. Once the moving contact piece is permanently deformed It will lead to a change in shape, which in turn will lead to a change in the position of the fulcrum of the moving contact piece, resulting in a change in the parameters of the switch action, which will seriously cause the switch to fail to operate or reset

[0007] The above problems lead to the fact that the same type or similar micro switches with forced separation function are basically not seen in the market, which belongs to the bottleneck of the micro switch industry. The switch does not have the forced separation function. It cannot be separated normally during the pressing process, which sometimes brings serious safety hazards. Because the existing micro switch cannot realize forced separation, it cannot be applied in fields with safety requirements, especially in some industries with industry standards, such as the elevator industry, etc.

As a result, the switch application is strictly restricted, restricting the development of the industry

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