Patent ID: 7068132

Claim:
A compact magnetic induction switch, comprising: a switch case ( 1 ); a movable member ( 2 ) provided on an opening ( 1 D) of the switch case ( 1 ) and being reciprocally movable; an elastic body ( 3 ) which is installed inside the switch case ( 1 ) and urges an end portion of the movable member ( 2 ) so as to be protruded outside of the switch case ( 1 ); a magnet ( 6 ) fixed to the movable member ( 2 ); a Hall IC ( 4 ) for detecting change of magnetic field caused by movement of the movable member ( 2 ) with its operating point ( 4 a ); wherein if the magnet field applied to the operating point ( 4 a ) of the Hall IC becomes above or below a threshold by movement of the movable member ( 2 ), output signal of the Hall IC ( 4 ) switches on/off; and wherein the magnetic field threshold front an OFF state to an ON state is higher than the magnetic field threshold from an ON state to an OFF state.