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Definition and application of microswitch
来源: | 作者:electronics-101 | 发布时间: 2017-06-20 | 316 次浏览 | 分享到:
Micro switch is a kind of quick switch with pressure and actuation. It is also called sensitive switch. Master electrical instantaneous a trip is very small, the micro switch contact switch is small. The hand gently touched on, factories used to switch the internal short circuit, over-current protection. When the external mechanical force on the operation button, the operation button will move downward, through the pull hook. When the spring is pulled to a certain length, the moving spring rapid downward movement of the moving contact reed to the right end of the normally open contact contact with the following, in order to achieve the conversion circuit. If the external force is removed, the contact will be instantaneously converted under the action of spring restoring force.
        Micro switch is a kind of quick switch with pressure and actuation. It is also called sensitive switch. Master electrical instantaneous a trip is very small, the micro switch contact switch is small. The hand gently touched on, factories used to switch the internal short circuit, over-current protection. When the external mechanical force on the operation button, the operation button will move downward, through the pull hook. When the spring is pulled to a certain length, the moving spring rapid downward movement of the moving contact reed to the right end of the normally open contact contact with the following, in order to achieve the conversion circuit. If the external force is removed, the contact will be instantaneously converted under the action of spring restoring force. With some additional rollers or blocks, micro switches with other structural types can be derived, which can be adapted to different uses. Widely used in the mouse, household appliances, industrial machinery, motorcycles and other places, the switch is small, but plays an irreplaceable role.
The working principle of the micro switch is: external mechanical force through the transmission element (by pins, buttons, levers and rollers etc.) will force on the action of reed, and the energy accumulated to the critical point, produce instantaneous action, make the action at the end of the reed moving contact and fixed contact quick connect or disconnect. When the driving force acting on the element is removed, the action reed can reverse action, when the action critical point transmission element reverse stroke to the reed, instantaneous reverse action. The micro switch has small contact distance, short action stroke, small power and fast on-off. The moving speed of the movable contact has nothing to do with the speed of the driving element. According to the micro switch pin is the basic type, can be derived for short program, button button line program, button for large programs, the wheel button type, roller, roller lever spring, short arm type, long arm type etc.. The micro switch is used in electronic equipment and other equipment for automatic control and safety protection of frequent switching circuit. The micro switch is divided into large, medium and small, according to different needs can have waterproof type (used in liquid) and ordinary type, switch connected to two lines, to provide electricity for the electric machine control, etc..
The control of the microswitch is realized by using the throttle cam of the throttle to control the throttle opening. The micro switch is installed in the proper position of cam pull, pull throttle cam return, to the micro switch arm, disconnect the power supply of the electromagnetic coil relay, relay off