Optical unit with shake correction function

Patent metadata

Field	Value
Publication number	US-11985402-B2
Application number	US-202218083577-A
Country	US
Kind code	B2
Filing date	Dec 19, 2022
Priority date	Dec 28, 2021
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

In an optical unit with a shake correction function, a first inner-side wall surface disposed on an inner side of a first band-shaped portion of a circuit board in a Y-direction and a second inner-side wall surface disposed on an inner side of a second band-shaped portion of the circuit board in an X-direction are defined in an intermediate-member holder, and a first outer-side wall surface disposed on an outer side of the first band-shaped portion in the Y-direction and a second outer-side wall surface disposed on an outer side of the second band-shaped portion in the X-direction are defined on an outer-peripheral side covering portion. An interval between the first inner-side wall surface and the first outer-side wall surface is smaller than an interval between the second inner-side wall surface and the second outer-side wall surface.

First claim

What is claimed is:

1. An optical unit with a shake correction function, comprising:
a movable body having a camera module; an intermediate member rotatably holding the movable body; a fixed body rotatably holding the intermediate member; a magnetic drive mechanism to rotate the movable body with respect to the fixed body so that an optical axis of the camera module is inclined in an arbitrary direction; and a circuit board pulled out from the camera module, wherein
supposing that a direction orthogonal to the optical axis of the camera module disposed at a predetermined reference position is a first direction, a direction orthogonal to the optical axis of the camera module disposed at the reference position and the first direction is a second direction, one side in an optical axis direction being a direction of the optical axis of the camera module is a subject side, and a side opposite to the subject side is a counter-subject side;
the fixed body comprises an intermediate-member holder rotatably holding the intermediate member and an outer-peripheral side covering portion covering an outer peripheral side of the intermediate-member holder;
the circuit board comprises a module mounting portion mounted on an end surface on the counter-subject side of the camera module, a drawer portion pulled out from the module mounting portion to the outer peripheral side of the camera module, a band-shaped portion having an elongated band shape that is connected on one end part to the drawer portion and is pulled around on an outer peripheral side of the intermediate-member holder and an inner peripheral side of the outer-peripheral side covering portion, and a fixed portion connected to the other end part of the band-shaped portion and fixed to an outer peripheral surface of the intermediate-member holder;
when viewed from the optical axis direction of the camera module, when the optical axis of the camera module is at the reference position, an outer shape of the intermediate-member holder is a regular square or a rectangle, and four sides constituting the outer peripheral surface of the intermediate-member holder are parallel to the first direction or the second direction;
supposing that one side in the two sides of the intermediate-member holder parallel to the first direction is a first side, and one side in the two sides of the intermediate-member holder parallel to the second direction is a second side;
a width direction of the band-shaped portion is parallel to the optical axis direction when the optical axis of the camera module is at the reference position;
the drawer portion is pulled out from the module mounting portion toward the one side in the first direction on the second side;
the band-shaped portion is pulled around along the first side and the second side;
the fixed portion is fixed to the outer peripheral surface of the intermediate-member holder on the first side;
supposing that a part of the band-shaped portion disposed along the first side is a first band-shaped portion, and a part of the band-shaped portion disposed along the second side is a second band-shaped portion;
in the intermediate-member holder, a planar-shaped first inner-side wall surface disposed on an inner side of the first band-shaped portion in the second direction and orthogonal to the second direction and a planar-shaped second inner-side wall surface disposed on an inner side of the second band-shaped portion in the first direction and orthogonal to the first direction are defined;
on the outer-peripheral side covering portion, a planar-shaped first outer-side wall surface disposed on an outer side of the first band-shaped portion in the second direction and parallel to the first inner-side wall surface and a planar-shaped second outer-side wall surface disposed on an outer side of the second band-shaped portion in the first direction and parallel to the second inner-side wall surface are defined; and
an interval between the first inner-side wall surface and the first outer-side wall surface in the second direction is smaller than an interval between the second inner-side wall surface and the second outer-side wall surface in the first direction.

2. The optical unit with a shake correction function according to claim 1 , wherein
the band-shaped portion is constituted by a flexible printed circuit board.

3. The optical unit with a shake correction function according to claim 1 , wherein
the intermediate-member holder comprises a first upper-wall portion disposed on the subject side of the first band-shaped portion and a second upper-wall portion disposed on the subject side of the second band-shaped portion;
a surface on the counter-subject side of the first upper-wall portion is a first upper-side wall surface that has an end part on the subject side of the first inner-side wall surface connected thereto, extends toward an outer side in the second direction, and covers the first band-shaped portion from the subject side;
a surface on the counter-subject side of the second upper-wall portion is a second upper-side wall surface that has the end part on the subject side of the second inner-side wall surface connected thereto, extends toward an outer side in the first direction, and covers the second band-shaped portion from the subject side;
an end surface on an outer side of the first upper-wall portion in the second direction is parallel to the first outer-side wall surface;
an end surface on an outer side of the second upper-wall portion in the first direction is parallel to the second outer-side wall surface; and
a width of the first upper-side wall surface in the second direction is smaller than a width of the second upper-side wall surface in the first direction.

4. The optical unit with a shake correction function according to claim 3 , wherein
the circuit board is bent by 90° on a boundary between the drawer portion and the band-shaped portion;
supposing that a part on the drawer portion side of the second band-shaped portion is a base-end side second band-shaped portion, and a part on the first band-shaped portion side of the second band-shaped portion is a distal-end side second band-shaped portion;
an end surface on the subject side of the base-end side second band-shaped portion is disposed closer to the subject side than an end surface on the subject side of the distal-end side second band-shaped portion; and
a notch portion to prevent interference between the base-end side second band-shaped portion and the second upper-wall portion is provided on the second upper-wall portion.

5. The optical unit with a shake correction function according to claim 1 , wherein
the second band-shaped portion is pulled around to an end part on a side of the first side of the second side;
the first band-shaped portion is pulled around from the end part on a side of the second side of the first side to a center part of the first side; and
the fixed portion is fixed to an outer peripheral surface of the intermediate-member holder at the center part of the first side.

Assignees

• Nidec Sankyo Corp

Inventors

• Minamisawa Shinji
• Sue Takeshi

Classifications

• H04N23/51 Primary

  Housings · CPC title

• H04N23/52

  Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements · CPC title

• H04N23/682

  Vibration or motion blur correction · CPC title

• G03B5/00 Primary

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title

• H04N23/54 Primary

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title