Optical unit

Patent metadata

Field	Value
Publication number	US-11815733-B2
Application number	US-201917264853-A
Country	US
Kind code	B2
Filing date	Jul 5, 2019
Priority date	Aug 6, 2018
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

An optical unit is provided for performing heat dissipation for an optical module. The optical unit includes a movable body having the optical module and a fixed body which holds the movable body in a displaceable state. The movable body includes a circuit board provided in the optical module and at least one heat radiation member disposed in a periphery of the optical module. The heat radiation member is connected with the circuit board in a heat-conductive manner.

First claim

What is claimed is:

1. An optical unit comprising:
a movable body comprising an optical module; and
a fixed body which holds the movable body in a displaceable state;
wherein the movable body comprises:
a circuit board, provided in the optical module; and
at least one heat radiation member formed of metal material, disposed in a periphery of the optical module;

wherein the circuit board is disposed on an opposite side of the optical module to an object side, and the circuit board is provided with a protruded part which is protruded with respect to the optical module in a direction intersecting an optical axis of the optical module;
the heat radiation member is directly placed on and contacted with the protruded part of the circuit board, so that the heat radiation member is capable of radiating heat of the circuit board through a contacted portion of the heat radiation member with the circuit board;
an outer circumferential edge part of the circuit board is provided with a plurality of recessed parts which are recessed toward the heat radiation member from an outer circumferential edge of the protruded part to an inner side of the protruded part;
a metal foil formed on the recessed part and the heat radiation member formed of metal material are connected with each other by a solder, and thereby, heat generated in the circuit board is conducted from the recessed part to the heat radiation member through the solder, and the heat radiation member and the circuit board are fixed to each other by the solder.

2. The optical unit according to claim 1 , further comprising:
a shake correction drive mechanism, structured to drive the movable body around a first axial line intersecting an optical axis direction of the optical module and around a second axial line intersecting the optical axis direction and the first axial line,
wherein the shake correction drive mechanism comprises a magnet provided on a side of the movable body and a coil provided on a side of the fixed body,
wherein the heat radiation member is structured of a magnetic body, and
wherein the heat radiation member is disposed between the optical module and the magnet in a direction intersecting the optical axis direction.

3. The optical unit according to claim 2 , wherein
the heat radiation member is disposed around an optical axis of the optical module at intervals and faces the magnet.

4. The optical unit according to claim 1 , wherein
the heat radiation member is structured of a frame-shaped member which surrounds the optical module around an optical axis of the optical module.

5. The optical unit according to claim 1 , wherein
at least a part of the heat radiation member is overlapped with the optical module in an optical axis direction of the optical module.

Assignees

• Nidec Sankyo Corp

Inventors

• Sue Takeshi
• Gomyo Masato
• Minamisawa Shinji

Classifications

• 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

• G02B7/028 Primary

  with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation · CPC title

• G02B27/646

  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

• G03B5/06

  Swinging lens about normal to the optical axis · CPC title

• G03B17/55

  with provision for heating or cooling, e.g. in aircraft · CPC title