# US 12,014,889 B2 · Magnetic induction switch

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- Number: US 12,014,889 B2
- Document ID: US12014889B2
- Status: Granted
- Kind: B2
- Application number: 17/302,665
- Filed: 2021-05-10
- Published: 2021-11-18
- Granted: 2024-06-18
- Earliest claimed: 2020-05-13
- Assignees: Self Electronics Co., Ltd.
- Applicants: Self Electronics Co., Ltd.; Wanjiong Lin; Self Electronics USA Corporation
- Inventors: Dong Chen; Minghai Zhao; Binjie Xu; Jianguo Dong; Kai Xu
- Web page: https://patentgrep.com/patent/US12014889B2

## CPC

- H01H 50/18: Movable parts of magnetic circuits, e.g. armature
- H03K 17/9505: {Constructional details}
- H01H 36/00: Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H 50/02: Bases; Casings; Covers (frames for mounting two or more relays or for mounting a relay and another electric component H02B1/01, H04Q1/08, H05K)
- H03K 17/9517: {using galvanomagnetic devices}
- H03K 17/97: using a magnetic movable element
- H03K 2017/9713: {Multiposition, e.g. involving comparison with different thresholds}
- H03K 2217/94068: with magnetic detection
- H03K 2217/96023: Details of electro-mechanic connections between different elements, e.g.: sensing plate and integrated circuit containing electronics
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M)

## Abstract

A magnetic induction switch has a base; a mounting cavity is arranged in the base; an induction circuit board is arranged in the mounting cavity and a Hall induction element is provided; a rotating cover is rotated on the base and is provided with at least two positioning points on the rotating path; the magnet is provided in the rotating cover, and the position of the magnet relative to the Hall induction element changes during the rotation of the rotating cover so that the induction circuit board generates control signals; the magnetic induction switch of the invention is waterproof, avoids hidden trouble existing in the ignition of the mechanical switch, and has the advantages of simple structure and convenient manufacture.

## Claims

### Claim 1

A magnetic induction switch, comprising:
a base (100) with a boss (101);
a mounting chamber (200), arranged at a bottom of the base (100) and having a bottom cover (102) sealing the mounting chamber (200);
an induction circuit board (300), arranged in the mounting chamber (200) and provided with a Hall induction element (301);
a rotating cover (400), rotated and arranged on the base (100) and provided with at least two positioning points (401, 402) on a rotation path;
a magnet (500), arranged in the rotating cover (400), and the magnet (500) changes its position relative to the Hall induction element (301) during rotation of the rotating cover (400) to make the induction circuit board (300) generate a control signal,
wherein the boss (101) is provided with a snap ring (103), and the rotating cover (400) is provided with a clamping connector (403) that cooperates with the snap ring (103).

### Claim 2 (depends on 1)

The magnetic induction switch as claimed in claim 1, wherein the bottom cover (102) is provided with an external wire (600), one end of the external wire (600) is extended into the mounting chamber (200) and connected with the induction circuit board (300), and the other end is provided with a connector.

### Claim 3 (depends on 1)

The magnetic induction switch as claimed in claim 1, wherein a dial block (404) protruding radially inward is arranged inside the rotating cover (400), and the top surface of the boss (101) is provided with a first baffle (104) and a second baffle (105) along the rotation path interval arranged on both sides of the dial block (404), and there is a stop-back convex block (106) provided between the first baffle (104) and the second baffle (105) that is opposed to the dial block (404), and the dial block (404) and the middle of the stop-back convex block (106) is abut and matched.

### Claim 4 (depends on 3)

The magnetic induction switch as claimed in claim 3, wherein the dial block (404) is V-shaped, the tip is abut and matched with the stop-back convex block (106).

### Claim 5 (depends on 3)

The magnetic induction switch as claimed in claim 3, wherein the stop-back convex block (106) is a matching surface of circular arc type.