Patent attributes
There is provided a case member having a structure for preventing the pushing-out of a seal member caused by gas leakage within a connector portion and also for preventing an annular lip portion of the seal member from falling when fitting the connector portion and a mating connector to each other. In the seal member 13, the annular lip portion 13f extends in a direction of connecting of the connector portion 18 to the mating connector in surrounding relation to electrical contact portions 19a of connection terminals 19. A seal member holder 15 is fitted on an outer peripheral surface of the connector portion 18. An annular groove 15f for receiving the annular lip portion 13f of the seal member 13 is formed in this seal member holder 15.