Image pickup apparatus that is improved in heat dissipation efficiency, electronic apparatus, and accessory

Patent metadata

Field	Value
Publication number	US-2018263104-A1
Application number	US-201815895083-A
Country	US
Kind code	A1
Filing date	Feb 13, 2018
Priority date	Mar 7, 2017
Publication date	Sep 13, 2018
Grant date	—

Abstract

An image pickup apparatus improved in heat dissipation efficiency. An image pickup section includes an image pickup device. A circuit board includes an image processor for processing on output from the image pickup device. A duct section has a fan for discharging heat generated on the circuit board to the outside. A rear cover forming a part of an exterior is disposed at the rear of the apparatus in an optical axis direction. The circuit board is disposed between the duct section and the rear cover in the optical axis direction. The duct section includes a plurality of extended portions which are extended in the optical axis direction to surround the circuit board and are in contact with the rear cover.

First claim

What is claimed is:

1 . An image pickup apparatus comprising:
an image pickup section including an image pickup device; a circuit board configured to perform image processing on output from the image pickup device; a duct section configured to discharge heat generated on the circuit board to outside; and a rear member that is disposed at a rear part of the image pickup apparatus in an optical axis direction, and forms a part of an exterior, wherein the circuit board is disposed between the duct section and the rear member in the optical axis direction, and wherein the duct section includes a plurality of extended portions that are extended in the optical axis direction and are in contact with the rear member.

2 . The image pickup apparatus according to claim 1 , wherein the duct section has a fan mounted thereon.

3 . The image pickup apparatus according to claim 1 , wherein the plurality of extended portions are provided to surround the circuit board.

4 . The image pickup apparatus according to claim 3 , wherein the circuit board is formed with relief portions for avoiding interference with the plurality of extended portions.

5 . The image pickup apparatus according to claim 1 , wherein the plurality of extended portions are fixed to the rear member.

6 . The image pickup apparatus according to claim 1 , further comprising a bottom member that forms a part of the exterior, and
wherein the duct section is fixed to the bottom member.

7 . The image pickup apparatus according to claim 6 , wherein the bottom member is made of a metallic material.

8 . The image pickup apparatus according to claim 1 , further comprising a top member that forms a part of the exterior, and
wherein the duct section is fixed to the top member.

9 . The image pickup apparatus according to claim 8 , wherein the top member is made of a metallic material.

10 . The image pickup apparatus according to claim 1 , wherein the rear member is made of a metallic material.

11 . An electronic apparatus comprising:
a fan that has an intake port; a duct section that has an opening corresponding to the intake port of the fan; a circuit board that is connected to the duct section, and is disposed to be laminated on the duct section on an opposite side from the fan; a first cover that is disposed on an opposite side from the fan with respect to the circuit board, and forms a part of an exterior; and a second cover that forms a part of the exterior in a direction substantially orthogonal to a laminating direction in which the duct section and the circuit board are laminated, wherein the duct section includes a plurality of first extended portions extended to surround the circuit board, and a plurality of second extended portions extended in the direction substantially orthogonal to the laminating direction, and wherein the first extended portions are fixed to the first cover, and the second extended portions are fixed to the second cover.

12 . The electronic apparatus according to claim 11 , wherein the second cover is disposed on a bottom side of the electronic apparatus.

13 . The electronic apparatus according to claim 11 , wherein the second cover is arranged on a top side of the electronic apparatus.

14 . The electronic apparatus according to claim 12 , further comprising a third cover that has a substantially U-shape, and covers the duct section from above and sides, and
wherein the third cover is disposed to sandwich the duct section in a left-right direction.

15 . The electronic apparatus according to claim 11 , wherein the first cover is made of a metallic material.

16 . The electronic apparatus according to claim 11 , wherein the circuit board is formed with relief portions for avoiding interference with the first extended portions.

17 . The electronic apparatus according to claim 11 , wherein the duct section includes a first heat dissipation section and a second heat dissipation section, on each of which fins substantially parallel to a main flow direction are disposed, and an opening corresponding to the intake port of the fan,
wherein the first heat dissipation section is larger in flow passage length than the second heat dissipation section, wherein out of the fins disposed on the first and second heat dissipation sections, at least the fins dispose on the first heat dissipation section are each divided into a plurality of divided fins with respect to the main flow direction, and wherein the number of fins per unit length in the main flow direction is larger in the first heat dissipation section than in the second heat dissipation section.

18 . The electronic apparatus according to claim 17 , wherein the fins disposed on the first heat dissipation section and the fins disposed on the second heat dissipation section are disposed in plurality and in parallel, respectively, and
wherein a pitch of the fins disposed on the second heat dissipation section is larger than a pitch of the fins disposed on the first heat dissipation section.

19 . The electronic apparatus according to claim 17 , wherein the fins disposed on the second heat dissipation section are disposed in plurality and in parallel, and
wherein a pitch of the fins disposed on the second heat dissipation section is smaller as a distance from a center of the opening is smaller.

20 . The electronic apparatus according to claim 17 , wherein an area of an intake opening of the duct section, associated with the first heat dissipation section, is larger than an area of an intake opening associated with the second heat dissipation section.

21 . The electronic apparatus according to claim 17 , wherein an air flow passage in the first heat dissipation section forms a substantially linear shape.

22 . The electronic apparatus according to claim 21 , wherein an air flow passage in the second heat dissipation section forms a substantially bent shape.

23 . The electronic apparatus according to claim 17 , wherein out of the fins disposed on the first heat dissipation section, a fin closest to the intake opening of the duct section, associated with the first heat dissipation section, is larger in length than a fin adjacent to the fin in the main flow direction.

24 . The electronic apparatus according to claim 17 , wherein the fins disposed in the second heat dissipation section is divided into a plurality of divided fins with respect to the main flow direction, and
wherein out of the fins disposed on the second heat dissipation section, a fin closest to an intake opening of the duct section, associated with the second heat dissipation section, is larger in length than a fin adjacent to the fin in the main flow direction.

25 . The electronic apparatus according to claim 17 , wherein the opening and the fan are provided as a single opening and a single fan.

26 . The electronic apparatus according to claim 17 , wherein some of the plurality of divided fins in the first heat dissipation section exist in a part of an area opposed to the opening.

27 . The electronic apparatus according to claim 26 , wherein out of the fins dispose on the first heat dissipation section, the divided fins which exist in the part of the area opposed to the opening are lower in protrusion height than divided fins which exist in an area which is not opposed to the opening.

28 . The electronic appa

Assignees

• Canon Kk

Inventors

• Hamada Takeshi
• Shimizu Yoko

Classifications

• H04N23/54

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

• H05K7/20

  Modifications to facilitate cooling, ventilating, or heating · CPC title

• H04N23/52 Primary

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

• H04N23/51

  Housings · CPC title

• H05K1/0209

  External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings · CPC title