JP2005123470A - Portable electronic device and heat radiator for video camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable electronic device having high heat radiating effect and a heat radiator for a video camera. <P>SOLUTION: In a video camera 1 having a camera 2 and a VTR 3 rotatably mounted to the camera 2, a chamber 13 is provided between the camera 2 and the VTR 3, and a vane 12 rotatable cooperatively with the VTR 3 is housed in the chamber 13. The rotation of the vane 12 causes air within the casing 2a of the camera 2 to be stirred, whereby the air is circulated to the external air via ventilation ports 16, 17 in the side of a liquid crystal display accommodation 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat dissipation device that releases heat generated in a casing of a portable electronic device to the outside.

  A large number of heating elements such as power transistors are used in portable electronic devices. Conventionally, heat dissipation measures have been taken, such as attaching a heat sink to the heat generating portion of the substrate or covering the heat generating portion with a metal plate.

  However, in such a method using natural heat dissipation, a sufficient heat dissipation effect cannot be obtained, and it may be difficult to suppress the temperature rise of the heating element.

  In view of such circumstances, it is an object of the present invention to provide a portable electronic device and a video camera heat dissipation device having a high heat dissipation effect.

  The present invention for solving the above-described problems provides a portable electronic device provided with a rotation operation unit, wherein a blade that rotates in conjunction with the rotation operation unit is provided inside the housing, and the rotation of the blade. A vent hole is provided in the casing for circulating the air in the casing with the outside air in accordance with the movement.

  According to this configuration, when the rotation operation unit is rotated, the blades are rotated to agitate the air in the casing, and the air in the casing is circulated with the outside air through the ventilation openings. Therefore, the heat generated in the housing is effectively discharged, which helps to suppress the temperature rise of the heat generating part.

  The rotation operation unit is provided in the housing of the main body, a chamber is defined between the rotation operation unit and the main body, and the blade is coupled to the rotation shaft of the rotation operation unit in the chamber. Preferably, the chamber is communicated with the inside of the housing of the main body.

  According to this configuration, when the rotation operation unit is rotated, the blades are rotated in the room, and the air in the housing is circulated with the outside air through the ventilation openings. A chamber is formed between the rotation operation unit and the main body, and the blades are accommodated in the chamber, so that the housing can be made compact and the blades are coupled to the rotation shaft of the rotation operation unit. Therefore, there is an effect that the mechanism is simplified.

  The chamber is formed in a circular shape, and the tip of the blade is brought into sliding contact with the peripheral surface thereof, and a partition wall extending from the rotation shaft of the rotation operation unit to the peripheral wall is provided inside the chamber, and the housing of the main body unit Thus, it is preferable that a pair of holes is provided in a portion facing the chamber so as to sandwich the partition wall.

  According to such a configuration, among the holes arranged on both sides of the partition wall, the indoor air flows out from one hole into the housing of the main body, and the air in the housing of the main body from the other hole. Flow into. Therefore, the air in the housing is circulated efficiently, and the heat dissipation is improved.

  The portable electronic device described above is preferably a video camera in which the main body is a camera unit and the rotation operation unit is a VTR unit.

  According to the present invention, as the rotation operation unit rotates, the blades rotate to circulate the air in the housing with the outside air, so that the heat dissipation effect is enhanced.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 3 show a video camera according to an embodiment of the present invention. FIG. 1 shows a section taken along line II-II in FIG. 2, and FIGS. 2 and 3 respectively show lines II and III in FIG. -III shows a cross section taken along line III.

  The video camera 1 includes a camera unit (main body unit) 2 and a VTR unit (rotation operation unit) 3, and the VTR unit 3 is rotatably attached to the camera unit 2. That is, by placing the hand on the grip band (not shown) of the VTR unit 3 and holding the VTR unit 3 and rotating the VTR unit 3 according to the shooting angle, the burden on the wrist during shooting is reduced. doing.

  As shown in FIG. 4, a shaft 4 projects from the center of the side surface of the housing 2 a of the camera unit 2, and a circular peripheral wall 5 projects from the shaft 4. A partition wall 6 that protrudes from the vicinity of the shaft 4 in the radial direction and reaches the vicinity of the peripheral wall 5 is provided on the side surface of the housing 2 a inside the peripheral wall 5. Further, a pair of holes 7 are provided on both sides of the partition wall 6 sandwiched by the housing 1 a of the camera unit 1. Further, a flare 8 connected to the partition wall 6 is provided between the pair of holes 7 on the inner surface of the housing 2a (see FIG. 3).

  As shown in FIG. 5, a hole 9 is provided at the center of the side surface of the casing 3 a of the VTR unit 3, a boss 10 is provided at the periphery of the case, and a circular peripheral wall 11 is provided around the hole 9. It is. A blade 12 extending in the radial direction from the boss 10 and reaching the peripheral wall 11 is projected from the side surface of the housing 2 a inside the peripheral wall 10.

  Then, the shaft 4 of the camera unit 2 is fitted into the boss 10 of the VTR unit 3, the peripheral wall 5 of the camera unit 2 is externally fitted to the peripheral wall 11 of the VTR unit 3, and the tip of the shaft 4 is thermally deformed to engage the locking unit. By forming 12, the camera unit 2 and the VTR unit 3 are assembled together. As a result, a chamber 13 is formed between the camera unit 2 and the VTR unit 3 to accommodate the blades 12. The chamber 13 communicates with the inside of the housing 2 a of the camera unit 2 through a pair of holes 7 and 7 on both sides of the partition wall 6. Note that the gap between the shaft 4 and the partition wall 6 shown in FIG. 4 is closed by the boss 10, while the gap between the partition wall 6 and the peripheral wall 5 is closed by the peripheral wall 11 (see FIG. 1).

  Inside the housing 2a of the camera unit 2, a plurality of substrates 14 are arranged upright so as to face the holes 7 and 7 (see FIG. 3). Further, a pair of upper and lower ventilation ports 16 and 17 are formed on the side surface of the liquid crystal display device housing portion 15 on the opposite side of the holes 7 and 7 across the substrate 14, and a filter 18 is provided in the ventilation ports 16 and 17. It is installed.

  Now, when the VTR unit 3 is rotated in the clockwise direction, the blades 12 are rotated in the same direction inside the chamber 13, and the air in the chamber 13 flows out from the upper hole 7 into the housing 2a of the camera unit 2, Air in the housing 2 a of the camera unit 2 flows into the chamber 13 from the lower hole 7. Accordingly, an air flow as shown by an arrow in FIG. 3 is generated inside the housing 2a of the camera unit 2, and the air in the housing 2a of the camera unit 2 flows out from the upper vent 16 to the outside. The outside air flows into the housing 2 a of the camera unit 2 from the lower vent 17. When the VTR unit 3 is rotated counterclockwise, the air flow direction is reversed. That is, since the air in the housing 2a of the camera unit 2 can be circulated with the outside air by the rotation operation of the VTR unit 3, the heat radiation effect is remarkably improved as compared with the conventional method of natural heat radiation. The heat radiating device of the present invention is useful for portable electronic devices in which it is difficult to install an electric fan due to power supply capacity constraints.

The heat dissipation device of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, in the above embodiment, the blade 12 is provided on the boss 10 supported by the shaft 4, but when the VTR unit 3 is directly supported by the camera unit 2, the blade 12 may be provided on the rotation shaft. Good.

  The heat dissipation device of the present invention can be used for various portable electronic devices including a video camera.

It is a figure which shows the video camera which is one Embodiment of this invention, and is the II-II sectional view of FIG. It is the II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. (A) is the front view of the camera part of the video camera, (b) is the side view. (A) is a front view of the VTR part of the video camera, and (b) is a side view thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Video camera 2 Camera part 2a Case 3 VTR part 3a Case 4 Axis 5 Perimeter wall 6 Bulkhead 7 Hole 8 Flare 9 Hole 10 Boss 11 Perimeter wall 12 Blade 13 Chamber 14 Substrate 15 Liquid crystal display storage part 16 Ventilation hole 17 Ventilation hole 18 filter

Claims (4)

  In a portable electronic device including a rotation operation unit, a blade that rotates in conjunction with the rotation operation unit is provided inside the housing, and air in the housing is removed from the outside air as the blade rotates. A heat dissipating device for a portable electronic device, characterized in that a circulating air vent is provided in the housing.   The rotation operation unit is provided in the housing of the main body, a chamber is defined between the rotation operation unit and the main body, and the blade is coupled to the rotation shaft of the rotation operation unit in the chamber. 2. The heat dissipating device for a portable electronic device according to claim 1, wherein the chamber is communicated with the housing of the main body.   The chamber is formed in a circular shape, and the tip of the blade is brought into sliding contact with the peripheral surface thereof, and a partition wall extending from the rotation shaft of the rotation operation unit to the peripheral wall is provided inside the chamber, and the housing of the main body unit 3. A heat dissipation device for a portable electronic device according to claim 2, wherein a pair of holes are provided at locations facing the chamber so as to sandwich the partition wall. The heat dissipating device for a video camera, wherein the main body portion is a camera portion, and the rotation operation portion is a VTR portion.

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