Invention Grant
- Patent Title: Push-button switch
- Patent Title (中): 按钮开关
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Application No.: US10994422Application Date: 2004-11-22
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Publication No.: US06930266B2Publication Date: 2005-08-16
- Inventor: Masatsugu Takeuchi , Hisashi Watanabe
- Applicant: Masatsugu Takeuchi , Hisashi Watanabe
- Applicant Address: JP Osaka
- Assignee: Matsushita Electric Industrial Co., Ltd.
- Current Assignee: Matsushita Electric Industrial Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: RatnerPrestia
- Priority: JP2003-414459 20031212
- Main IPC: H01H13/14
- IPC: H01H13/14 ; C25D5/12 ; H01H1/02 ; H01H1/04 ; H01H5/18 ; H01H5/30 ; H01H13/00 ; H01H13/12 ; H01H13/52 ; H01H13/785

Abstract:
A push-button switch includes insulating member having a surface, first and second stationary contacts electrically isolated from each other and provided at the surface of the insulating substrate, and a movable contact. The movable contact includes an elastic metal base having a dome-shape and having a concave surface spaced from the first stationary contact and an outer rim mounted on the second stationary contact, a nickel plated layer provided on the concave surface of the elastic metal base and having a thickness ranging from 0.05 μm to 0.5 μm, a copper plated layer provided on the nickel plated layer and having a thickness ranging from 0.05 μm to 0.7 μm, and a silver plated layer provided on the copper plated layer and having a thickness ranging from 0.1 μm to 2 μm. The push-button switch has a long operating life time, has a stable contact resistance, and is inexpensive.
Public/Granted literature
- US20050126901A1 Push-button switch Public/Granted day:2005-06-16
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