Compact magnetic induction switch
AssigneeAsa Electronic Industry Co., Ltd.
InventorYuhikiro Asa
Life of this patent
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Abstract
An extremely compact low cost magnetic induction switch which may be activated by an extremely small operation force (approximately 1 g) has a movable member (2) and a coil spring (3) arranged inside a switch case (1), the spring coil (3) supporting the movable member (2), and the movable member protruding from an opening (1D) of an upper surface portion of the switch case (1). A Hall IC (4) is arranged in a switch case (1). When the upper portion is pushed, a magnet (6) fixed to the movable member (2) moves downward so that an output signal of the Hall IC (4) is changed from OFF to ON.
Claims17
A compact magnetic induction switch, comprising:
- a switch case (1);
- a movable member (2) provided on an opening (1D) 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 (4a);
- wherein if the magnet field applied to the operating point (4a) 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.
A compact magnetic induction switch, comprising:
- a switch case (1);
- a movable member (2) provided on an opening (1D) 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 (4a);
- wherein if the magnet field applied to the operating point (4a) 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;
- wherein said switch case includes an engaging hole;
- and
- a mounting bracket for mounting said switch to a desired member, said mounting bracket including a first side including an engaging portion for engagement with said engaging hole and said mounting bracket including a second side having an opening portion for receiving the end portion of said movable member projecting outwardly of said switch case.
Dependencies are inferred from the claim text.