| 摘要 |
PROBLEM TO BE SOLVED: To prevent or reduce the inflow of grease oil content to a switch chamber or motor chamber to suppress the early wear of a motor contact or brush. SOLUTION: The stationary core 19 of a magnet switch 4 has a set of leg parts 19a on both side ends, and the leg parts 19a inserted to a through-hole provided through the end surface of a switch case 16 and caulked to the switch case 16. Since a minute clearance with the through-hole is generated in the circumference of the leg parts 19a inserted to the through hole of the switch case 16, the clearance is airtightly blocked with a seal member 22 (e.g. a resin agent hardenable at ordinary temperature or high temperature). Accordingly, since the grease oil content generated in a clutch chamber can be prevented from running from the clutch chamber to the switch chamber through the clearance, the early wear of the motor contact (a movable contact 24 and a fixed contact) by the adhesion of grease oil content can be suppressed.
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