Interpretation and application of micro switch

         A micro switch is a quick switch actuated by pressure, also called a sensitive switch. A main electrical appliance with a small stroke and instantaneous action. The micro switch is a small contact switch. When operating the 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 reed quickly moves downwards, and the contact at the right end of the moving reed turns to contact the normally open contact below, thereby realizing the conversion of the circuit. If the external force is removed, under the action of the spring restoring force, the contact will switch instantly. Adding some rollers or pressing blocks can derive other structural types of micro switches, which can be adapted to different purposes. 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 elements (press pins, buttons, levers, rollers, etc.), and after accumulating the energy to the critical point, an instantaneous action is generated to make the action reed The moving contact and the fixed contact at the end are quickly connected or disconnected. When the force on the transmission element is removed, the action reed produces 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 instantaneously completed. The contact distance of the micro switch is small, the action stroke is short, the pressing force is small, and the on-off is rapid. The movement speed of the moving contact has nothing to do with the movement speed of the transmission element. The micro switch is based on the pin type, and 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 boom type, and long boom type. and many more. Micro switches are used in electronic equipment and other equipment for automatic control and safety protection devices that require frequent circuit switching. Micro switches are divided into large, medium, and small. According to different needs, they can be divided into waterproof type (used in liquid environment) and ordinary type. The switch connects two lines to provide power on and off control for electrical appliances and machines. The control of the micro switch is realized by the throttle cable cam that controls the throttle opening. The micro switch is installed on the proper position of the cable cam. When the throttle cable cam returns, it will hold the micro switch arm and disconnect the solenoid power supply of the relay. The relay is disconnected, and the power supply to the electric turbine is stopped, so that the product stops working. In the same way, when the throttle is opened, the throttle cable cam loosens the micro switch arm, the micro switch closes, the relay solenoid power is turned on, the relay closes, power is supplied to the electric turbine, and the product works. Using the position of the pull-down cam of different engine speeds to trigger the opening or closing of the micro switch, the artificial control of the switching time of the electric turbocharger can be realized.

The role of limit switches

Limit switch
Limit switch, also known as travel switch, can be installed on relatively stationary objects (such as fixed frames, door frames, etc., referred to as still life) or moving objects (such as driving vehicles, doors, etc., referred to as animals). When an animal approaches a still life, the connecting rod of the switch drives the contact of the switch to cause the closed contact to break or the open contact to close. The circuit and motor are controlled by the change of the open and closed state of the switch contact.

The role of limit switch
1, protection

The most important function of the limit switch must be its protection effect. The limit switch is also called the travel limit switch, which is mainly used to control the travel of mechanical equipment and carry out limit protection. In actual application, the travel limit switch is installed in a pre-arranged position. When the moving part module of the production machinery strikes the stroke, the travel limit switch contact action, effectively switching between circuits. Limit switch refers to a kind of electrical appliance that correctly switches the circuit according to the stroke position of the moving parts. The function principle of the limit switch is similar to that of a button. It is widely used in all kinds of machine-color aluminum doors and windows, hoisting machinery, etc. to control its stroke and carry out terminal limit protection.

2, daily life

With the continuous progress of society, electrical equipment is widely used in our daily life. Many electrical equipment cannot be used without limit switches. So what is the role of limit switches? The main function of the limit switch is to protect the machinery in chain. The most common thing in life is the application of limit switches in washing machines and tape recorders. When the washing machine spins, the middle speed is very high. If you open the washing machine or the cover inadvertently, you can easily cause injury to the human body. In order to effectively avoid such accidents, most washing machines are equipped with electrical contacts. Once the washing machine is turned on The door or cover will automatically cut off the power and force the rotating parts to stop, effectively avoiding the occurrence of injuries.

3. Industry

The function of limit switch is also manifested in the industrial field. It is mainly used to convert mechanical displacement into electrical signals, so that the operating state of the motor can be effectively changed to control mechanical actions or program control. The real use of the limit switch is in industry, and it can be combined with other equipment to form more complex and scientific automation equipment. The limit switch on the machine tool effectively controls the movement of the workpiece and the automatic feed stroke to avoid collision accidents. The limit switch is used to automatically reverse the direction of the controlled object between the specified positions to obtain continuous reciprocating motion.

Principle and Application of Foot Switch

The principle of the foot switch is a switch that controls the on and off of the circuit by stepping on or stepping on it. It is used in the control circuit that cannot be touched by the hands to replace the hands to achieve the purpose of operation. Foot switches are widely used in medical equipment, stamping equipment, welding equipment, textile equipment, and printing machinery. Applications in the electronics industry, such as small diamond, terminal, machine configuration, there are automatic, and inching, inching is the application of foot switches. Step on it, a journey. A simple foot switch is actually a built-in travel switch, when the foot pedal gives a signal, the switch is executed. But in the field of welding, the function of the foot switch also plays a role in controlling the size of the output current. This type of foot switch can also be divided into two categories: one, a mechanical foot switch, and two, an inductive foot switch. The mechanical foot switch is a traditional rack and pinion drive, and the induction type is based on the principle of electromagnetic induction.

working principle of the toggle switch

Toggle switch is a manual control switch, which is mainly used for on-off control of AC and DC power circuits, but generally can also be used in circuits of several kilohertz or up to 1 MHz. With the characteristics of small size and convenient operation, it is a commonly used switch in electronic equipment. In manual operation, the switch action can be divided into two stages. The first stage is to pull the trigger to the middle by hand until the trigger is in the vertical position. At this time, the pointed top of the single-pole slider gradually moves closer to the middle until the middle position, and the compression spring is further compressed. After the trigger passes the vertical position, the single-pole slider quickly moves in the other direction under the pressure of the compression spring, and drives the trigger to turn quickly. The contact foot is quickly connected, this is the second stage. At this time, the separation speed of the contact is related to factors such as the pressure of the compression spring and the friction between the moving parts, and the speed is very high. According to the test, the time from the disconnection of the contact to the reconnection is only about milliseconds, and the average speed is up to milliseconds. This speed is many times faster than manual pull speed or motor test pull speed.