Patent ID: 6142007
Filing Date: 2000-11-07
Classification: H01H

Abstract:
A shock sensor comprising:a hermetically sealed case extending along a direction substantially perpendicular to a direction in which a shock is to be detected; anda fixed reed and a movable reed sealed inside said hermetically sealed case so as to extend in a lengthwise direction of said hermetically sealed case;wherein said movable reed includes a weight member and a supporting member which elastically supports said weight member, so that when said weight member moves in said detected direction due to said shock, a contact of a tip of said weight member presses against or estranges from a contact of a tip of said fixed reed, thereby opening or closing a space between said fixed reed and said movable reed; andwherein a surface of said weight member forms said contact of a tip of said weight member; andwherein said fixed reed comprises two fixed reeds, each having contacts placed at prescribed intervals, such that when said weight member of said movable reed moves in the detected direction due to a shock, said contact member installed at said tip of said weight member estranges from said contact of one of said two fixed reeds and presses against said contact of the other of said two fixed reeds; andwherein said weight member of said movable reed and one of said two fixed reeds are made of a magnetic material and the other said two fixed reeds is made of a nonmagnetic material.