Definition and application of micro switch

A micro switch is a quick switch actuated by pressure, also called a sensitive switch. A main control electrical appliance with a very small stroke and instantaneous action. A micro switch is a small contact switch that is turned on by a light touch of the hand. It is often used in factories as a short circuit and overcurrent protection inside a large switch. When an external mechanical force acts on the operating button, the operating button moves downward and the spring is stretched by the hook. When the spring is pulled to a certain length, the moving spring moves downward rapidly, and the contact at the right end of the moving spring turns to contact the normally open contact below, thereby realizing the circuit conversion. If the external force is removed, the contact is instantly converted again under the action of the spring restoring force. By adding some rollers or pressure blocks, other structural types of micro switches can be derived to adapt to different uses. It is widely used in mouse, household appliances, industrial machinery, motorcycles and other places. Although the switch is small, it plays an irreplaceable role.
The working principle of the micro switch is: the external mechanical force acts on the action reed through the transmission element (pin, button, lever, roller, etc.), and after the energy is accumulated to the critical point, an instantaneous action is generated, so that the moving contact at the end of the action reed is quickly connected or disconnected with the fixed contact. When the force on the transmission element is removed, the action reed generates a reverse action force. When the reverse stroke of the transmission element reaches the critical point of the action of the reed, the reverse action is completed instantly. The contact spacing of the micro switch is small, the action stroke is short, the pressing force is small, and the on-off is fast. The action speed of its moving contact has nothing to do with the action speed of the transmission element. The micro switch is based on the pin type, which can be derived from the button short stroke type, button large stroke type, button extra large stroke type, roller button type, reed roller type, lever roller type, short arm type, long arm type, etc. Micro switches are used in electronic equipment and other equipment for automatic control and safety protection devices that require frequent switching of circuits. Micro switches are divided into large, medium and small types. According to different needs, they can be waterproof (used in liquid environment) and ordinary types. The switch connects two circuits to provide power on and off control for electrical appliances, machines, etc.
The control of the micro switch is achieved by using the throttle cable cam that controls the throttle opening. The micro switch is installed in the appropriate position of the cable cam. When the throttle cable cam returns to its position, it presses against the micro switch arm, disconnects the power supply of the relay electromagnetic coil, and the relay is disconnected.