Patent ID: 8920022

Claim:
A waterproof device comprising: a device outer housing including a seating portion and a hole piercing the center of the seating portion; an extensible member with waterproof property, including a cylindrical portion which can be extended/retracted in an axial direction, closing one end in the axial direction as well as opening the other end in the axial direction, and inserted into the hole, and a flange projecting integrally from an outer periphery of the other end portion of the cylindrical portion and seated on the seating portion from the outside of the device outer housing; a holding member attached to the device outer housing, and including a presser portion sandwiching the flange with the seating portion in a thickness direction of the flange to thereby secure the waterproofing around the flange, and a through hole connecting to the opening; and an operation shaft including a shaft end portion protruding to the outside of the holding member through the through hole, which is inserted into the cylindrical portion and arranged in a state of being able to be pushed from the outside of the device outer housing so as to allow the cylindrical portion to extend.