PURPOSE: To prevent water, etc. from flowing into an air pump, by providing at a part of a body case a suction port and a discharge port which are externally projected from the body case and are communicated with an air pump in the body case, the suction port being provided with an air intake opening and covered with a cap of waterproof structure.
CONSTITUTION: A suction port 8 and a discharge port 9 which are communicated with a power air pump 2 incorporated in a body case 1 are provided at a part of the body case 1 in such a manner as to externally project from the body case 1. In this manner, as outside air is directly sucked through the suction port 8 into the air pump 2, and is discharged from the discharge port 9, there is no possibility of rainwater or seawater flowing into the body case 1 simultaneously with suction of air as has conventionally occurred, and therefore corrosion of electrical parts in the body case 1 may be prevented. Further, as the suction port 8 is provided with an air intake opening 21 and is covered with a cap of waterproof structure, water and the like may be surely prevented from flowing into the air pump 1.
SAGAWA HARUO
SHIMOYAMA TATSUYA
| JPS5213618U | 1977-01-31 | |||
| JPS50134205A | 1975-10-24 | |||
| JP52134598B |