# US 2021/0242808 A1 · Vibration-type actuator, pan head, and electronic apparatus

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- Number: US 2021/0242808 A1
- Document ID: US20210242808A1
- Status: Published application
- Kind: A1
- Application number: 17/162,711
- Filed: 2021-01-29
- Published: 2021-08-05
- Earliest claimed: 2020-02-03
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Satoshi Tsuchiya
- Web page: https://patentgrep.com/patent/US20210242808A1

## CPC

- G03B 3/10: Power-operated focusing
- H02N 2/103: {by pressing one or more vibrators against the rotor}
- H02N 2/0065: {Friction interface (friction linings F16D69/00)}
- H02N 2/163: {Motors with ring stator}
- G03B 17/561: {Support related camera accessories}
- G03B 2205/0061: using piezoelectric actuators
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR

## Abstract

A vibration-type actuator includes a vibrating body including an annular elastic member and an electric-mechanical energy conversion element, and an annular contact body configured to move relative to the vibrating body. The contact body includes a base portion, a support portion annularly extending from the base portion in a radial direction of the contact body, and a friction member provided at the support portion, formed separately from the support portion, and being in contact with the vibrating body. The friction member includes a first part extending in a direction along a central axis of the annular contact body, and a second part extending in the radial direction, the first part and the second part being connected to the support portion. The first part includes a portion that is connected by being either internally or externally fitted to the support portion in the radial direction.

## Claims

### Claim 1

A vibration-type actuator comprising:
a vibrating body including an annular elastic member and an electric-mechanical energy conversion element; and
an annular contact body configured to move relative to the vibrating body,
wherein the contact body includes:
a base portion,
a support portion annularly extending from the base portion in a radial direction of the contact body, and
a friction member provided at the support portion, formed separately from the support portion, and being in contact with the vibrating body,
wherein the friction member includes a first part extending in a direction along a central axis of the annular contact body, and a second part extending in the radial direction, the first part and the second part being connected to the support portion, and
wherein the first part includes a portion that is connected by being either internally or externally fitted to the support portion in the radial direction.

### Claim 2 (depends on 1)

The vibration-type actuator according to claim 1, wherein the friction member includes the first part having a plurality of parts.

### Claim 3 (depends on 2)

The vibration-type actuator according to claim 2, wherein the plurality of parts in the first part includes a part that is internally fitted to the support portion, and a part that is externally fitted to the support portion.

### Claim 4 (depends on 1)

The vibration-type actuator according to claim 1, wherein a material of the support portion has a Young's modulus lower than a Young's modulus of a material of the friction member.

### Claim 5 (depends on 1)

The vibration-type actuator according to claim 1, wherein rigidity of a material of the support portion is lower than rigidity of a material of the friction member.

### Claim 6 (depends on 1)

The vibration-type actuator according to claim 1, wherein a material of the friction member is steel, and a material of the support portion is an aluminum alloy or brass.

### Claim 7 (depends on 1)

A pan head comprising:
a turntable; and
the vibration-type actuator according to claim 1, the vibration-type actuator being provided on the turntable.

### Claim 8 (depends on 1)

An electronic apparatus comprising:
a member; and
the vibration-type actuator according to claim 1, the vibration-type actuator being provided on the member.