| 摘要 |
PROBLEM TO BE SOLVED: To provide an actuator unit capable of preventing water from flowing into a case hermetically closed so as to be openable/closable.SOLUTION: An actuator unit 1 configured so that an actuator 3 is accommodated in a main body 11 of a case 2 and in which an opening 10 of the main body 11 is hermetically closed by a lid 12, comprises a gas pack 17 storing air, having an interior communicating with an interior of the case 2, and contracting by a pressure difference between the interior and an exterior. If an internal pressure of the case 2 falls to be lower than an external pressure, the gas pack 17 contracts and supplies the air into the case 2 so that the internal pressure of the case 2 is equal to the external pressure of the case 2. |
