Patent ID: 7138587
Filing Date: 2006-11-21
Classification: H01H

Abstract:
1. A key switch comprising: a support plate; a key top arranged above said support plate; a pair of link members interlocked to each other to support said key top above said support plate and direct said key top in a vertical direction; and a switch mechanism capable of opening and closing a contact section of an electric circuit in accordance with a vertical movement of said key top; wherein said switch mechanism includes a membrane switch sheet carrying said contact section at a position corresponding to said key top and placed on said support plate; wherein each of said pair of link members includes a sliding part slidably engaged with said support plate; and wherein said membrane switch sheet is provided with a through-hole in a region where said sliding part of each link member is engaged with said support plate, said sliding part of said link member being slidably placed on said support plate through said through-hole in said membrane switch sheet.