The waterproof micro switch is a contact structure with a small contact interval and a snap action mechanism, and a contact structure with a specified stroke and a specified force for switching action. It is covered with a casing and has a driving rod outside. Contact: In the type of waterproof micro switch, compared with the semiconductor switch with waterproof micro switch characteristics, the function of the switch is realized by the mechanical switch of the contact.
Waterproof micro switches also have different classifications, which can be divided into small, ultra-small, normally open, normally closed, etc. The general feature is small size, and stable sealing is achieved through rubber sealing ring and epoxy resin filling, which can be There are different waterproof grades for use in places where it will be exposed to water or dust. The following will teach you how to use the waterproof micro switch correctly.
1. Operation method of waterproof micro switch
(1) Do not apply force repeatedly. If the handle button is already pressed, if it is pressed further, the excessive load may cause deformation of the reed (shrapnel) and cause malfunction.
(2) In particular, if an excessive load is applied to the lateral pressure type, the riveted part may be damaged, which may cause damage to the microswitch. Therefore, during installation and operation, please be careful not to attach a load weight higher than the excessive load weight (29.4N, 1 minute, 1 time).
(3) Please press the handle to set the switch in the direction of vertical motion. Pressing only one side of the handle, or operating at an angle may result in reduced durability.
2. Countermeasures against dust in the waterproof micro switch
Since it is a switch without a sealed structure, do not use it in a dusty place. In the case of unavoidable use, protective measures such as coverings should be considered.
3. The printed circuit board of the waterproof micro switch should be used as a standard with a single-sided substrate of t=1.6mm
(1 )When using substrates with different thicknesses and double-sided perforated substrates, it may affect the fitting clearance of the switch, substrate insertion, solder joint resistance Thermal properties, these vary depending on the via as well as the substrate design, so it is recommended to implement a confirmation test.
(2 )When the switch is mounted on the printed circuit board and the board is divided, the scattered board powder may enter the inside of the switch, so please be careful. In particular, when the substrate separation powder or foreign matter adheres to the switch due to the surrounding environment or the work table, the container and the substrate are prevented from overlapping, and there is a possibility of poor contact.
Waterproof micro switches are widely used in various cold, humid, dusty and harsh environments, such as automobiles, spraying equipment, refrigerators, ice machines, bathroom equipment, air conditioners, water heaters, etc. and some outdoor equipment and instruments. It can also be used on the charging stand for new energy vehicles.
