Patent ID: 6894235

Claim:
A switch comprising: at least one stationary contact; at least one movable contact slidable on said at least one stationary contact and configured to be electrically connected to and disconnected from said at least one stationary contact; lubricant provided between said at least one stationary contact and said at least one movable contact; said at least one stationary contact having a contact surface which is configured to contact said at least one movable contact, said contact surface having zigzagged ridges which are so dimensioned such that the contact surface is able to retain the lubricant and to be electrically connected to said at least one movable contact; a pressing unit configured to press said at least one movable contact toward said at least one stationary contact; and an electrical insulator projecting from said at least one stationary contact and configured to prevent said at least one movable contact from electrically contacting said at least one stationary contact.