# US 12,224,640 B2 · Vibration generating device and electronic device

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- Number: US 12,224,640 B2
- Document ID: US12224640B2
- Status: Granted
- Kind: B2
- Application number: 18/525,955
- Filed: 2023-12-01
- Published: 2024-03-28
- Granted: 2025-02-11
- Earliest claimed: 2016-11-28
- Assignees: MINEBEA MITSUMI Inc.
- Applicants: MINEBEA MITSUMI Inc.
- Inventors: Mikio Umehara; Yutaka Kamogi
- Web page: https://patentgrep.com/patent/US12224640B2

## CPC

- H02K 33/02: with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
- H01F 7/20: without armatures (cores H01F3/00; coils H01F5/00 {; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381})
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

In accordance with one aspect of the present disclosure, a vibration generating device includes a protruding part; a base provided with the protruding part and formed of a magnetic body; an annular coil surrounding the protruding part; a plate facing the base and formed of a magnetic body; and an elastic member supporting the plate with respect to the base. The plate and the base constitute magnetic circuit.

## Claims

### Claim 1

A vibration generating device comprising:
a base;
a coil attached to the base;
a plate formed with a magnetic body, the plate opposing the base;
a plurality of elastic members fixed to a part of the plate outside the coil and a part of the base outside the coil,
a gap between the plate and the base corresponds to a thickness of the elastic member,
a space between the plurality of elastic members in a circumferential direction, wherein
the plurality of elastic members includes a first elastic member,
the space can accommodate a part of the deformed first elastic member.

### Claim 2 (depends on 1)

The vibration generating device according to claim 1, wherein
the first elastic member is deformable in the circumferential direction.

### Claim 3 (depends on 1)

An electronic device comprising:
a housing; and
the vibration generating device according to claim 1.