Lens apparatus and imaging apparatus

Patent metadata

Field	Value
Publication number	US-10921544-B2
Application number	US-201916385493-A
Country	US
Kind code	B2
Filing date	Apr 16, 2019
Priority date	Apr 19, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A lens apparatus includes a rotator configured to rotate around the optical axis direction when contacting the vibrator, a biasing member configured to bias the vibrator from a first side to a second side in the optical axis direction so as to compressively bring the vibrator into contact with the rotator, and a driving ring configured to receive a rotation of the rotator, to rotate around the optical axis direction relative to the fixed lens barrel, and to move the lens unit in the optical axis direction. The fixed lens barrel includes a receiver configured to receive the biasing force of the biasing member transmitted to the driving ring via the rotator. The receiver is provided inside the vibrator and the rotator in the radial direction and on the first side of the end of the driving ring on the second side.

First claim

What is claimed is:

1. A lens apparatus comprising:
a fixed lens barrel;
a lens unit provided inside the fixed lens barrel in a radial direction and movable in an optical axis direction of the lens unit;
a vibrator configured to generate a vibration excited by an electromechanical energy conversion;
a rotator configured to rotate around the optical axis direction in a case that the rotator contacts the vibrator vibrated;
a biasing member configured to bias the vibrator from a first side to a second side in the optical axis direction so as to bring the vibrator into compressive contact with the rotator; and
a driving ring configured to receive a rotation of the rotator, to rotate around the optical axis direction relative to the fixed lens barrel, and to move the lens unit in the optical axis direction,
wherein the fixed lens barrel includes a receiver configured to receive a biasing force of the biasing member transmitted to the driving ring via the rotator, and
wherein the receiver is provided inside the vibrator and the rotator in the radial direction and on the first side of an end of the driving ring on the second side.

2. The lens apparatus according to claim 1 , wherein the receiver is provided on the first side of the rotator.

3. The lens apparatus according to claim 1 , wherein the receiver is provided in a range where the vibrator is provided in the optical axis direction or on the first side of the vibrator.

4. The lens apparatus according to claim 1 , wherein the receiver includes:
a rotating member that is rotatable;
a first contacting surface provided on the fixed lens barrel and configured to contact the rotating member; and
a second contacting surface provided on the driving ring and configured to contact the rotating member on a side opposite to the first contacting surface via the rotating member,
wherein each of the first and second contacting surfaces inclines to the optical axis direction.

5. The lens apparatus according to claim 4 , wherein the rotator includes:
a third contacting surface provided as a surface inclined to the optical axis direction on the driving ring and configured to contact the rotating member; and
a fourth contacting surface provided on the ring member attached to the fixed lens barrel from the first side and configured to contact the rotating member on the side opposite to the third surface via the rotating member.

6. The lens apparatus according to claim 1 , wherein the receiver positions the driving ring relative to the fixed lens barrel in the optical axis direction and in a radial direction orthogonal to the optical axis direction.

7. An imaging apparatus comprising:
a lens apparatus; and
an image sensor configured to photoelectrically convert light passing through the lens apparatus,
wherein the lens apparatus includes;
a fixed lens barrel;
a lens unit provided inside the fixed lens barrel in a radial direction and movable in an optical axis direction of the lens unit;
a vibrator configured to generate a vibration excited by an electromechanical energy conversion;
a rotator configured to rotate around the optical axis direction in a case that the rotator contacts the vibrator vibrated;
a biasing member configured to bias the vibrator from a first side to a second side in the optical axis direction so as to bring the vibrator into compressive contact with the rotator; and
a driving ring configured to receive a rotation of the rotator, to rotate around the optical axis direction relative to the fixed lens barrel, and to move the lens unit in the optical axis direction,
wherein the fixed lens barrel includes a receiver configured to receive a biasing force of the biasing member transmitted to the driving ring via the rotator, and
wherein the receiver is provided inside the vibrator and the rotator in the radial direction and on the first side of an end of the driving ring on the second side.

Assignees

• Canon Kk

Inventors

• Hayakawa Makoto

Classifications

• G02B27/642

  Optical derotators, i.e. systems for compensating for image rotation, e.g. using rotating prisms, mirrors · CPC title

• G02B7/08 Primary

  adapted to co-operate with a remote control mechanism · CPC title

• G02B27/646 Primary

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title