Title:
スイッチの接触機構
Document Type and Number:
Japanese Patent JP4063528
Kind Code:
B2
Abstract:
Disclosed is an AC/DC switch for electric power tools which is free of bouncing at the time of turning on, still assuring the quick cutting-off of heavy current. In the improved electric switch the timing of turning-on and -off is guaranteed to be free from variation with age, which would be caused by wearing some projections of the switching mechanism and/or inconsistency in spring material. The electric switch, therefore, has a long-life and a high rating. The switching mechanism uses a reversal spring for quickly turning on and off in such a way that the movable contacts may be brought close to the stationary contacts prior to the turning-on, thereby permitting the turning-on subsequent to traverse of the reversal point without the bouncing of the movable contacts off from the stationary contacts when hitting thereon, and that movement of the movable contacts may be prevented before the reversal spring has stored an increased amount of energy, allowing the quick release of the stored energy to make the movable contacts leave the stationary contacts at a speed high enough to prevent appearance of electric arcs between the movable and stationary contacts, and hence prevent the wearing of the contacts.
Inventors:
Yuichi Kato
Application Number:
JP2001361372A
Publication Date:
March 19, 2008
Filing Date:
November 27, 2001
Export Citation:
Assignee:
Satori S Tech Co., Ltd.
International Classes:
H01H5/10; H01H9/20; H01H1/50; H01H9/06; H01H15/18; H01H3/00; H01H5/06; H01H19/635
Domestic Patent References:
| JP57175334U | ||||
| JP48023968U | ||||
| JP54147487A | ||||
| JP2002521800A |
Attorney, Agent or Firm:
Isao Sasaki
Kyoko Kawamura
Kyoko Kawamura