Press-button switch

Application Number: 00107294
Application Date: 2000.05.09
Publication Number: 1273428
Publication Date: 2000.11.15
Priority Information: 1999/5/10 JP 128699/99
International: H01H13/48;H01H13/52
Applicant(s) Name: ALPS Electric Co., Ltd.
Inventor(s) Name: Onu Hiroshi;Iwama Naoya;Yamagata Takeo
Patent Agency Code: 11216
Patent Agent: liu jiyang
Abstract To provide the structure of a dome-shaped movable contact having a reverse function used in a push button switch, wherein it is possible that the movable contact comes into contact with a fixed contact at position excluding the central portion thereof where dusts are liable to gather, obtains high contact reliability, has good feeling in manipulation and is excellent in an intimate contact property with a sheet member covering the movable contact. The push button switch includes fixed contacts, a dome-shaped movable contact disposed above the fixed contacts, and a projection formed on the inner surface of the movable contact at a portion excluding a dome-shaped apex portion so as to be in contact with and separated from one of the fixed contacts.