INDUSTRIAL MANUFACTURING BLOG YOU SHOULD BE READING

Classification And New Product Development Of Micro Switches

17 Nov.,2023

There are two main application areas for micro switches:

First, they can be used when a low operating force is required and the action is clear.

Second, use them when long-term reliability is required. This is because the internal mechanism and the closing force on the switch contacts have nothing to do with the operating force.

The reliability of the switch is largely a matter of contact force: reliable, sufficient but never excessive force will extend the service life.

Common applications for micro switches include door interlocks on microwave ovens, level and safety switches in elevators, vending machines, arcade buttons, and detection of paper jams or other malfunctions in photocopiers. Microswitches are usually used in anti-dismantling switches for gate valves of fire sprinkler systems and other water pipe systems. In this case, it is necessary to know whether the valve has been opened or closed.

Microswitches are widely used. Their applications include electrical appliances, machinery, industrial control, vehicles, convertible roofs, and many other places for control circuits. Although some switches can be used directly to control small motors, solenoids, lights, or other devices, they can usually only carry current in the control circuit. The special low-pressure version can sense coins in vending machines or with fan blades.

The microswitch can be directly operated by a mechanism, or as a part of the package of pressure, flow, or temperature switch, operated by a sensing mechanism such as a Bourdon tube. In these latter applications, the repeatability of the actuator position when switching is performed is critical to long-term accuracy.

At present, the types of micro switches can be divided into traditional micro switches, silent micro switches, and optical micro switches. In addition to the well-known brands of HONEYWELL, OMRON, Panasonic, CHERRY cherry, Korean IC, Taiwan ZIPPY, and so on.

Mute micro-switches mostly use square origin micro-switches, which are mostly used for office use. The button feels duller, but there is no traditional micro-actions "click" sound. This type of micro-switch is more suitable for offices, libraries, and other places that need to be quiet.

Traditional micro-motion uses a metal reed trigger structure. When the button is pressed, the metal reed in the micro switch triggers once, sends an electrical signal to the computer and then resets to achieve the trigger effect. However, after long-term use, there are problems of physical wear and oxidation, which may cause poor contact, or contact position offset, which may cause problems such as inability to trigger or double-click. Currently, manufacturers use different methods to increase the wear resistance of springs to extend their service life or use alloy materials to enhance the electrical performance of contact parts.

Greetech Electronics has developed two micro switches, G309 series.

Model: G309-150M00E40H-GA280E

Model: G309-150V00E40H

The switch body is small and exquisite, the structure is compact, adopts the contact type structure, the contact is reliable, the working temperature range is minus 40 degrees Celsius to 85 degrees Celsius, and is used for car door locks and car light controllers.

For more details, please send us an email: mark-song@greetech.com