FLUID-RELATED FUNCTION DEVICE

摘要

Provided is a fluid-related function device capable of inhibiting deformation of a case component or a connective member which may occur due to expansion of a fluid accumulated in a space for trapping sputter during resistance welding. A pressure switch (1) has a space (β) for trapping sputter produced during projection welding, the space being provided between a joint (10) and a cap member (20). A communicating passage (65) communicates the interior and the exterior of the space (β). The communicating passage (65) is formed so as to allow passage of a fluid while restricting passage of the sputter.