Guide: “Micro” in “micro-switch” means not triggering the action of the switch when it is slightly moved, but means that the switching action is very weak and can be completed in an instant. Let me introduce the principle of micro switch in detail, let's take a look~

First, the principle of micro switch - - Introduction

The micro switch, the English name is Micro Switch, referred to as SM, also known as the sensitive switch, is officially defined as "a contact mechanism with a small contact spacing and a snap mechanism that performs switching operations with a specified stroke and a specified force. Covered by the outer casing, there is a switch for the drive rod on the outside. In fact, the micro switch refers to a switch with very fast switching, which has small contact spacing, short stroke, low power, fast switching, etc. Features, follow the small series to understand the structure and principle of the micro switch.

Second, the principle of micro switch - - structure

The micro switch is mainly composed of a transmission part, a contact part, a casing part, a quick acting mechanism part and a terminal part. Among them, the transmission part is mainly used to transmit external force or stroke to the internal mechanism; the contact part is mainly used to open or close the electrical circuit; the outer part is mainly used to isolate the internal mechanism from the outside, and has high insulation. And mechanical strength; the quick-action mechanism is the core part of the micro-switch, using high-quality conductive spring material, mainly used to perform quick action; the terminal part is mainly used to connect with the outside.

Third, the principle of micro switch

When an external force acts on the actuator part (the display form of the specific switch uploader part may be slightly different, some push pins, buttons, and some are levers, rollers, etc.), the corresponding actuator member transmits the force to the action spring. The corresponding displacement is generated on the sheet, and when the reed moves to a certain critical point, the switch is triggered to act, so that the movable contact at the end of the action reed is quickly turned on or off with the fixed contact.

When the external force acting on the actuator portion is removed, the action reed generates a reverse displacement, and when the reed moves to a fixed critical point, the switch instantaneously reverses.