Camera device with hand-shake correction function

Patent metadata

Field	Value
Publication number	US-11480809-B2
Application number	US-202016817644-A
Country	US
Kind code	B2
Filing date	Mar 13, 2020
Priority date	Dec 27, 2019
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

The present disclosure provides a camera device including a deflected optical system and provided with an anti-shake mechanism without increasing a size of the camera device. The optical system includes a reflection member that deflects an optical axis, and it sequentially includes, from an object side, a reflection member, camera lens groups, and a camera element, to rotate the reflection member with an axis perpendicular to a plane defined by an optical axis of the camera lens groups and an optical axis at the object side reflected by the reflection member, and an axis parallel to the optical axis at the reflected object side being rotation axes, in such a manner that a hand-shake is corrected.

First claim

What is claimed is:

1. An anti-shake mechanism of a deflected camera device, the deflected camera device comprising an optical system, the optical system comprising a reflection member, and the anti-shake mechanism being configured to perform a handshake correction by rotating the reflection member in the deflected camera device,
wherein the reflection member comprises a reflection surface configured to deflect an optical axis; the reflection member is arranged closer to an object side than camera lens groups in such a manner that the reflection member rotates around a first rotation axis and a second rotation axis being rotation axes, the first rotation axis being an axis perpendicular to a plane defined by an optical axis of the camera lens groups and an optical axis at the object side reflected by the reflection member, and the second rotation axis being an axis parallel to the reflected optical axis at the object side;
a ball member is used as a sliding portion that enables the reflection member to smoothly rotate; and
an electromagnetic actuator is provided to drive a driving member for rotation, and the electromagnetic actuator comprises a mechanism for holding the sliding portion and a shake elimination mechanism;
a force applying direction of the electromagnetic actuator as a force applying unit is the same as a direction in which at least one permanent magnet and at least one magnet yoke of the electromagnetic actuator attract each other;
the at least one magnet yoke is arranged on an anti-shake base;
the mechanism for holding the sliding portion comprises a first holder provided with a first permanent magnet and a second holder provided with a second permanent magnet, the first holder is held on the second holder through a first ball member in such a manner that the first holder freely rotates around the first rotation axis, the second holder is held on the anti-shake base by a second ball member in such a manner that the second holder freely rotates around the second rotation axis, the ball member comprises the first ball member and the second ball member different from the first ball member, and the at least one permanent magnet comprises the first permanent magnet and second permanent magnet; and
with respect to the at least one magnet yoke arranged on the anti-shake base, the first permanent magnet of the first holder presses the first ball member and second ball member across the second holder by an attraction between the first permanent magnet and the at least one magnet yoke.

2. The anti-shake mechanism of the deflected camera device as described in claim 1 , wherein the reflection surface of the reflection member is symmetrical with respect to the first rotation axis and the second rotation axis, and the anti-shake mechanism is equipped with the electromagnetic actuator at an outermost portion.

3. The anti-shake mechanism of the deflected camera device as described in claim 2 , wherein the electromagnetic actuator is a voice coil motor.

4. The anti-shake mechanism of the deflected camera device as described in claim 2 , wherein a device that changes an optical power of an image surface by moving two or more lens groups of the camera lens groups in the deflected optical axis is provided in the camera lens groups.

5. The anti-shake mechanism of the deflected camera device as described in claim 2 , wherein the reflection member is a prism or a mirror.

6. The anti-shake mechanism of the deflected camera device as described in claim 1 , wherein the electromagnetic actuator is a voice coil motor.

7. The anti-shake mechanism of the deflected camera device as described in claim 1 , wherein a device that changes an optical power of an image surface by moving two or more lens groups of the camera lens groups in the deflected optical axis is provided in the camera lens groups.

8. The anti-shake mechanism of the deflected camera device as described in claim 1 , wherein the reflection member is a prism.

9. The anti-shake mechanism of the deflected camera device as described in claim 1 , wherein the reflection member is a mirror.

10. A camera comprising an anti-shake mechanism of a deflected camera device the deflected camera device comprising an optical system, the optical system comprising a reflection member, and the anti-shake mechanism being configured to perform a handshake correction by rotating the reflection member in the deflected camera device,
wherein the reflection member comprises a reflection surface configured to deflect an optical axis;
the reflection member is arranged closer to an object side than camera lens groups in such a manner that the reflection member rotates around a first rotation axis and a second rotation axis being rotation axes, the first rotation axis being an axis perpendicular to a plane defined by an optical axis of the camera lens groups and an optical axis at the object side reflected by the reflection member, and the second rotation axis being an axis parallel to the reflected optical axis at the object side;
a ball member is used as a sliding portion that enables the reflection member to smoothly rotate; and
an electromagnetic actuator is provided to drive a driving member for rotation, and the electromagnetic actuator comprises a mechanism for holding the sliding portion and a shake elimination mechanism;
a force applying direction of the electromagnetic actuator as a force applying unit is the same as a direction in which at least one permanent magnet and at least one magnet yoke of the electromagnetic actuator attract each other;
the at least one magnet yoke is arranged on an anti-shake base;
the mechanism for holding the sliding portion comprises a first holder provided with a first permanent magnet and a second holder provided with a second permanent magnet, the first holder is held on the second holder through a first ball member in such a manner that the first holder freely rotates around the first rotation axis, the second holder is held on the anti-shake base by a second ball member in such a manner that the second holder freely rotates around the second rotation axis, the ball member comprises the first ball member and the second ball member different from the first ball member, and the at least one permanent magnet comprises the first permanent magnet and second permanent magnet; and
with respect to the at least one magnet yoke arranged on the anti-shake base, the first permanent magnet of the first holder presses the first ball member and second ball member across the second holder by an attraction between the first permanent magnet and the at least one magnet yoke.

11. The camera as described in claim 10 , wherein the reflection surface of the reflection member is symmetrical with respect to the first rotation axis and the second rotation axis, and the anti-shake mechanism is equipped with the electromagnetic actuator at an outermost portion.

12. The camera as described in claim 10 , wherein the electromagnetic actuator is a voice coil motor.

13. The camera as described in claim 10 , wherein a device that changes an optical power of an image surface by moving two or more lens groups of the camera lens groups in the deflected optical axis is provided in the camera lens groups.

14. The camera as described in claim 10 , wherein the reflection member is a prism.

15. The camera as described in claim 10 , wherein the reflection member is a mirror.

16. A portable electronic device comprising the camera as described in claim 10 .

Assignees

• Aac Optics Solutions Pte Ltd

Inventors

• Kazuo Shikama

Classifications

• G03B17/17

  with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera · CPC title

• G02B7/182

  for mirrors · CPC title

• G03B2205/0023

  by tilting or inclining one or more optical elements with respect to the optical axis · CPC title

• G02B13/0065

  having a beam-folding prism or mirror · 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