IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIW
US007656268B2
(12) United States Patent ao) Patent No.: Us 7,656,268 B2
Yu (45) Date of Patent: Feb. 2,2010
(21) Appl.No.: 11/173,381
(22) Filed: Jul. 2, 2005
(65) Prior Publication Data
US 2007/0001797 Al Jan. 4, 2007
(51) Int. CI.
H01H 71/16 (2006.01)
H01H 61/00 (2006.01)
H01H13/00 (2006.01)
(52) U.S. CI 337/59; 337/37; 337/52;
337/66; 200/334; 200/339
(58) Field of Classification Search 337/66,
337/27, 36-37, 56, 62, 85, 113, 59, 52; 200/334, 200/520-525, 529-535, 553, 339 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
3,932,829 A * 1/1976 Ellenberger 337/49
4,167,720 A 9/1979 Krasser
4,258,349 A * 3/1981 Flory 337/46
4,931,762 A * 6/1990 Fierro 337/66
4,937,548 A 6/1990 Sdunek
5,223,813 A 6/1993 Cambreleng
5,262,748 A 11/1993 Tsung-Mou
A switch includes a body and a switch member pivotably engaged with the top opening of the body. A link has one end pivotably connected to a first end of the switch member and the other end of the link is movably received in a guide path is defined in the body. The second end of the link is located at an inner periphery of the guide path when the switch member is in "ON" position to let two contact points be in contact with each other, and a space is defined between the second end of the link and the outer periphery of the guide path so that the second end of the link is allowed to move toward the outer periphery when a contact portion is deformed upward when overloaded.
10 Claims, 8 Drawing Sheets
