US Patent 10072985 Detector housing assembly

A housing assembly includes a base and a front assembly assembled with the base. The base includes a bottom and a sidewall that surrounds a peripheral edge of the bottom, and the front assembly is configured to engage with the sidewalls and close an open end of the base. The front assembly includes a latch that protrudes inward from an inner surface, and a spring-biased cam is rotatably supported on the base. The cam includes a cam surface that is engaged with the latch in such a way that rotation of the cam about the rotational axis results in a translation of the front assembly relative to the base in a direction parallel to the cam rotational axis. The cam is manually actuated using a tool.