Patent ID: 7960667
Filing Date: 2011-06-14
Classification: H01H

Abstract:
1. A switch comprising: a substrate; a movable contact element including: a movable contact having a dome shape; a cover sheet having the movable contact bonded to its lower surface; and a pressure sensitive conductive sheet having the cover sheet stacked on its top surface; and a fixed contact that is formed on a top surface of the substrate such that a top surface of the fixed contact faces a lower surface of the pressure sensitive conductive sheet, the pressure sensitive conductive sheet including a low resistor layer and a high resistor layer having a larger resistance value than the low resistor layer, wherein the fixed contact has an outer-periphery fixed contact, a first central fixed contact and a second central fixed contact, the pressure sensitive conductive sheet comes in contact with the first central fixed contact and the second central fixed contact by deforming the movable contact elastically, a first resistor element is connected to the first central fixed contact, and a second resistor element is connected to the second central fixed contact, the second resistor element having a larger electric resistance value than the first resistor element.