Title:
【考案の名称】オ―トトリッピング機能を有する多段式押しボタン式スイッチ
Document Type and Number:
Japanese Patent JP3066485
Kind Code:
U
Abstract:
This invention is related to an auto tripping multi-state key switch, comprising a switch housing being formed with at least one guide groove and one slideway at an inner side thereof; a first contact strip and a second contact strip both fastened to the switch housing, the first contact strip including a first contact and the second contact strip including a second contact; a bi-metallic strip having thereon a third contact and being connected to a connection plate include thereon a fourth contact; a key being provided with at least one first protrusion thereon for engaging the guide groove within the switch housing, the key having an end that is formed with a serrated edge; a rotary housing being provided with at least one second protrusion thereon for engaging the guide groove and the slideway allowing sliding movement of the rotary housing within the switch housing, the rotary housing having a top end being formed with a serrated edge that cooperates with the serrated edge at the bottom of the key, and the rotary housing having a bottom; and a first resilient member including an end that is fastened to the switch housing and another end that is in contact with the bottom of the rotary housing to bias the rotary housing towards the key in relation of the switch housing. This invention can automatically trip the switch to form a closed circuit while encountering current overload so as to ensure electrical safety.
Inventors:
Tsun-mu Yu
Application Number:
JP600599U
Publication Date:
February 25, 2000
Filing Date:
August 09, 1999
Export Citation:
Assignee:
Tsun-mu Yu
International Classes:
H01H73/30; H01H13/58; (IPC1-7): H01H73/30; H01H37/52
Attorney, Agent or Firm:
Shusaku Yamamoto