| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic contactor which is capable of reducing a contact bounce at a starting time of operation with a simple structure, in addition, reducing a size and cost by improving the supporting structure of a movable contact. SOLUTION: An electromagnetic contactor opens/closes the contact point mechanism of a main circuit by a pulling/restored operation, wherein the main circuit comprises a pair of fixed contacts 2 and a movable contact 3 that bridges between each contact point 2a of the fixed contacts 2. In this contactor, a combination of the movable contact and a contacting spring 10 are mounted and held in a contact holder 4 molded with resin, and the movable contact 3 is covered with a shock absorber 12 around contacting region with the contact holder 4, wherein the material of the shock absorber is made of the resins such as liquid polymer and the like having a high heat resistance, thermal insulation, and slidability; and then the movable contact is coated, for instance, by an insert molding method. By this shock absorber, an impact that occurs at a starting time of a contacting operation by a pulling operation of the electromagnet and then conducted to the movable contact through the contact holder is reduced, thereby decreasing contact bounce, further lowering thermal influence conducted form the movable contact to the contact holder. COPYRIGHT: (C)2004,JPO
|
