A push button switch

Abstract

This utility model provides a push-button switch, including a switch housing and a circuit board installed inside the switch housing. The circuit board has a first plate and a second plate. The first plate is used for soldering to wires, and the second plate has a conductive layer. A surrounding plate is provided inside the switch housing, and the surrounding plate and the switch housing enclose a first receiving cavity. After the wires and the circuit board are installed on the switch housing, glue is poured into the first receiving cavity. The glue wraps the solder joints of the wires and the circuit board, and after curing, it forms a shock-resistant buffer layer, eliminating the risk of stress cracking of the solder joints caused by vibration / temperature difference, and greatly improving the welding reliability. In addition, after the glue fills the cavity, it completely blocks the gap between the wires and the slots, and the gap between the circuit board and the switch housing, blocking the dust intrusion path from the root and significantly improving the protection level. Furthermore, the circuit board has slots formed between two adjacent conductive layers, thereby increasing the creepage distance between two adjacent conductive layers and improving safety and reliability.

Images