Sealed key-pad input button - has elastic or bellows sealed movement for use in extreme environment

摘要

The keypad type press button is used for entering information into a data terminal or for similar application but is hermetically sealed for use in adverse industrial or climatic conditions. The button tops a central tubular structure which has a central pillar movement on which the button is fixed. The central tubular structure is the contact housing etc. and is fitted directly into the equipment housing, it has extended cylindrical flanges around the top which support an elasticised seal between them and the central pillar movement. The membrane provides a complete all round seal, in an alternative version a bellow sealis used made of either elasticised or metal material.