Patent ID: 8642886

Claim:
A seal structure sealing a housing for passing a signal line therethrough, the seal structure comprising: a first case; a second case joined to the first case to define the housing, and provided with a recess portion through which the signal line passes at a joining surface joining the first case; a first seal member having size so as to be located in the recess portion, arranged on a bottom surface of the recess portion, and mounting the signal line; a second seal member having size so as to be located in the recess portion, including a gelatinous composition arranged in the recess portion to cover the signal line arranged on the first seal member; and a third seal member between the first and second cases, and including a normal width portion and an expanding portion, the normal width portion facing the joining surface, the expanding portion being wider than the normal width portion, the expanding portion facing and pushing the second seal member.