# US 12,003,155 B2 · Oscillatory actuator

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- Number: US 12,003,155 B2
- Document ID: US12003155B2
- Status: Granted
- Kind: B2
- Application number: 17/278,106
- Filed: 2019-09-17
- Published: 2021-11-11
- Granted: 2024-06-04
- Earliest claimed: 2018-09-21
- Assignees: Foster Electric Company, Limited
- Applicants: Foster Electric Company, Limited
- Inventors: Yusuke Chiba; Yoshikazu Okazaki
- Web page: https://patentgrep.com/patent/US12003155B2

## CPC

- B06B 1/045: {using vibrating magnet, armature or coil system}
- H02K 33/02: with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
- H02K 1/34: Reciprocating, oscillating or vibrating parts of the magnetic circuit
- H02K 33/16: with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
- G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user}
- B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

An oscillatory actuator 1 includes a cylindrical case 2, an electromagnetic driver 3, a mover 4, a first damper 40a, and an inner guide 6a. The electromagnetic driver 3 is provided inside the case 2. The mover 4 is enabled to oscillate through driving by the electromagnetic driver 3. The first damper 40a has a plurality of arms 52a supporting the mover 4 from an inner surface of the case 2. The inner guide 6a is provided on the inner surface of the case 2 and restricts movement of the first damper 40a beyond a predetermined range. The inner guide 6a is located further toward a center of the case 2 than the first damper 40a in a direction of an oscillation axis ◯ of the mover 4.

## Claims

### Claim 1

An oscillatory actuator comprising:
a cylindrical case;
an electromagnetic driver provided inside the case;
a mover enabled to oscillate through driving by the electromagnetic driver;
a plate spring having a plurality of arms supporting the mover inside the case; and
an inner guide that is provided inside the case, has a part contactable with the plate spring after movement of the plate spring beyond a predetermined range, and is configured to restrict movement of the plate spring beyond the predetermined range, the inner guide being located further toward a center of the case than the plate spring in a direction of an oscillation axis of the mover;
wherein the part of the inner guide that is contactable with the plate spring is located between the electromagnetic driver and the plate spring in the direction of the oscillation axis of the mover.

### Claim 2 (depends on 1)

The oscillatory actuator of claim 1, wherein
the inner guide restricts the movement of the plate spring beyond the predetermined range in the direction of the oscillation axis.

### Claim 3 (depends on 1)

The oscillatory actuator of claim 1, wherein
the inner guide restricts the movement of the plate spring in directions intersecting the direction of the oscillation axis.

### Claim 4 (depends on 1)

The oscillatory actuator of claim 1, wherein
the arms of the plate spring form a spiral shape, and
the inner guide includes steps having a helical shape that is centered around the direction of the oscillation axis and that corresponds to the spiral shape of the plate spring.

### Claim 5 (depends on 1)

The oscillatory actuator of claim 1, wherein
an inner edge of the inner guide is located further toward the mover than an inner surface of the electromagnetic driver.

### Claim 6 (depends on 1)

The oscillatory actuator of claim 1, wherein
the plate spring includes a first plate spring supporting one end of the mover and a second plate spring supporting an opposite end of the mover, and
the inner guide includes a first inner guide configured to restrict movement of the first plate spring and a second inner guide configured to restrict movement of the second plate spring.