| 摘要 |
<P>PROBLEM TO BE SOLVED: To reliably waterproof an electric device which can be used in a diving state, while facilitating maintenance of the electric device. <P>SOLUTION: An electric actuator A includes an electric actuator body 1 that is an electric device body, and a removable cover 3 for covering the electric actuator body 1 from above. In the electric actuator A, a height H of the cover 3 is set so that a distance between a water surface in the case where the cover 3 goes under water at a predetermined diving depth to cause water to enter the inside of the cover 3 with gas compressed in the cover 3, and an upper end of a storage space 3s inside the cover 3 is higher than a height of the electric actuator body 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
