Patent ID: 8905631

Claim:
A switch device comprising: a case having a through hole; a cylindrical member fitted into the through hole of the case; an operating member having a shaft section to be inserted into the cylindrical member and an operating section on an outer end; and a lock member which is fixed inside the operating section of the operating member and slides and rotates together with the operating section along an outer circumference of the cylindrical member, wherein the cylindrical member is provided with an engaging projection projecting toward an inner circumferential surface of the lock member, and wherein the lock member includes a resilient support section which has a space with respect to an inner circumferential surface of the operating section and which is resiliently deformable in a radial direction, and a lock section which is provided to the resilient support section and with which the engaging projection is resiliently engaged when the operating section is pushed inward and rotated.