Hinge Lever DC N/O N/C Micro Switch

Micro switches are switches with tiny contact intervals and snap action mechanisms. The contact mechanism that performs switching operations with a specified stroke and specified force is covered with a case. A switch that has an actuating lever on the outside because the contact spacing of the switch is relatively small. Hence the name micro switch, also known as a sensitive switch, a snap switch actuated by pressure.

Introduction to the terminology of micro switch
Micro switches, as the name suggests, use very small forces to control the switch. It is a switch in which the external mechanical force acts on the action reed through the transmission element, so that the fixed contact and the movable contact at the end are quickly connected or disconnected.
Micro switches have fine contact spacing and snap action mechanisms. A contact mechanism that performs switching operations with a specified stroke and force. Covered by a housing, it has actuators on the outside and has a smaller profile.

Micro switches are composed of five major categories of elements. The distance between the contacts is small and the torque is large. Generally, there is a drive rod on the outside.

How Micro Switches Work
The external mechanical force acts on the action reed through the transmission element (press pin, button, lever, roller, etc.). When the action reed moves to the critical point, an instantaneous action is generated, so that the movable contact and the fixed contact at the end of the action reed 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 completed instantaneously.
The contact spacing of the micro switch is small, the action stroke is short, the pressing force is small, and the on/off is rapid. The action speed of its moving contact has nothing to do with the action speed of the transmission element.

snap action push button/lever miniature micro switch

4 pin waterproof surface mount momentary micro switch

6 pin 12v electronic wire micro switch

surface mount limit micro switch

Micro switch classification
There are many types of micro switches, and there are hundreds of internal structures, which are divided into ordinary type, small type and ultra-small type according to volume; According to the protection performance, there are waterproof type, dustproof type and explosion-proof type; According to the breaking form, there are single-connection type, double-connection type and multi-connection type.
There is also a micro switch with strong separation (when the reed of the switch does not work, the external force can also make the switch open); According to the breaking capacity, there are common type, DC type, micro current type and high current type.
According to the use environment, there are common type, high temperature resistant type (250°C), super high temperature resistant (400°C) ceramic type micro switch
Micro switches are generally based on the basic type without auxiliary pressing accessories, and are derived from small-stroke and large-stroke types. Different auxiliary pressing accessories can be added to the micro switch according to the needs. According to the different pressing accessories added, the switch can be divided into: button type, reed roller type, lever roller type, short boom type, long boom type and other forms.
There are small, super small, super small and so on in size. Functionally, there is a waterproof type. The most common application is the mouse button.
(1) Small micro switch: the general size is 27.8 in length, 10.3 in width and 15.9 in height, with different parameters such as high capacity and low load.
(2) Ultra-small micro switch: the general size is 19.8 in length, 6.4 in width and 10.2 in height, with different functions of high precision and long life.
(3) Super small micro switch: the general size is 12.8 in length, 5.8 in width and 6.5 in height, and this type has an ultra-thin design.
(4) waterproof type

Micro switch technical parameters: (AC 125V 3A can be customized)
1. Rated load: AC 125V 1A/DC 30V 0.1A
2. Contact resistance: ≤100mΩMAX
3. Insulation resistance: AC 500V 1Minute
4. Soldering resistance temperature: 250±5°5s
5. Service life: 1,000,000 cycles
6. Operating temperature: -25 ℃ to 85 ℃
7. Working humidity: ≤85% RH
8. Operating force: 30gf±15gf
Applications: digital products, security, computers, communication products, household appliances, intelligent transportation, etc.

Micro switch technical parameters:
1. Rated load: AC 250V 3A/125V 5A
2. Contact resistance: ≤100mΩMAX
3. Insulation resistance: AC 500V 1Minute
4. Soldering resistance temperature: 250±5°5s
5. Service life: 1,000,000 cycles
6. Operating temperature: -25 ℃ to 85 ℃
7. Working humidity: ≤85% RH
8. Operating force: 30gf±10gf
Applications: digital products, security, computers, communication products, household appliances, intelligent transportation, etc.

Application of micro switch
Micro switches are used for automatic control and safety protection in equipment that needs to switch circuits frequently. Widely used in electronic equipment, instrumentation, mines, power systems, household appliances, electrical equipment, and military fields such as aerospace, aviation, ships, missiles, and tanks. It has been widely used in the above fields. Although the switch is small, it plays an irreplaceable role.
At present, the micro switches on the domestic market have a mechanical life ranging from 3W to 1000W according to the different requirements of use. Generally, there are 10W, 20W, 50W, 100W, 300W, 500W, and 800W. In China, beryllium bronze, tin bronze, and stainless steel wire are generally used as spring sheets. Foreign ALPS can achieve up to 1000W times, and their reeds are made of rare metal titanium.
Can be used in such as computer mouse, car mouse, automotive electronic products, communication equipment, military products, test instruments, gas water heaters, gas stoves, small appliances, microwave ovens, rice cookers, floating ball equipment, medical equipment, building automation, electric Tools and general electrical and radio equipment, 24-hour timers, etc.

Precautions for micro switches
(1) When fixing the switch body, use M2 small screws to fix it on a smooth surface with a torque of 0.098N·m or less. Also, to prevent the screws from loosening, it is recommended to use washers at the same time.
(2) Please note that the action body should not directly apply force to the button or actuator in the free state, and should apply force to the button in the vertical direction when using it.
(3) The setting of the action after the action is based on 70% or more of the O.T. value. In the case of a switch, do not set the operating body at the operating limit position, so as not to shorten the service life due to the opening and closing and overtravel caused by shock.
(4) In the case of hand soldering, please use a temperature-regulated electric temperature of 320°C, complete the work within 3 seconds, and be careful not to apply force to the terminal during the work.
(5) It is recommended to use a low power circuit type (Au clad contact) when used under a small current and voltage.