JP2002112082A - Electronic camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To alleviate an influence of a heat to a recording means of a magnetooptic medium in an electronic camera containing the recording means of the medium. SOLUTION: The recording means of the magnetooptic medium is disposed at a rear side of a lens barrel. A component such as an integrated circuit or the like capable of heating is disposed at a side of the barrel. Thus, a thermal influence to the recording means is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiating structure in an electronic camera incorporating a recording device using a recording medium, such as a magneto-optical medium, which needs to consider the influence on heat.

[0002]

2. Description of the Related Art The main recording media of current electronic cameras are:
Card-shaped memory card with built-in semiconductor memory,
For example, it is called a smart card or a CF card. By using a semiconductor memory, the size of a memory card can be reduced, but the realized capacity is at most several tens of megabytes. The image quality of electronic cameras has been improved due to the increase in the number of pixels of CCDs. For this reason, the file size of still images has also increased. Due to the increase in the file size of one image, a memory card using a semiconductor memory has a small number of storable images, and there has been a demand for practical use of a high-capacity recording medium. In addition, some electronic cameras can record moving images, and it is desired that the moving images have high image quality. To shoot high-quality moving images, a memory having a larger capacity is required.

As a high-capacity recording medium, an MD data disk or a DVD-RAM, which is a magneto-optical recording medium, has been considered and has been commercialized. In addition, research has been conducted to perform higher-density recording using magneto-optical recording. Magneto-optical recording can realize a high-capacity recording medium, but in principle requires measures against heat, and the structure of the electronic camera also needs to consider heat dissipation.

[0004]

SUMMARY OF THE INVENTION As mentioned above,
In a recording apparatus using a magneto-optical recording medium, it is necessary to design an electronic camera in consideration of heat radiation. For example, a semiconductor integrated circuit (IC) constituting a signal processing circuit for image processing is considered to generate considerable heat. Also,
Digital moving picture recording requires high-speed signal processing continuously for a longer time than still picture recording, and the IC of the signal processing circuit unit is likely to generate heat. Such heat generation may affect the pickup of the recording apparatus that performs signal recording, and affects the basic performance of recording and reproduction. That is, it is necessary to consider heat radiation so as not to affect the operation of the recording apparatus.

[0005]

According to the first aspect of the present invention, an electronic camera includes a lens barrel, and a component, such as a recording device, which needs to consider the influence of heat behind the lens barrel. The device is arranged. Other components (for example, signal processing ICs) other than the recording device of the electronic camera, which have a high possibility of generating heat, have at least a part of them.
It is arranged on the side of the lens barrel.

According to the second aspect of the present invention, in addition to the above, the heat radiating plate of the component disposed on the side of the lens barrel is similarly disposed on the side of the lens barrel.

According to the third aspect of the present invention, in addition to the above, by disposing the holding grip on the side of the recording device, the hand holding the camera can be separated from the heat sink when holding the camera. It has become.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic camera using the present invention will be described below. FIG. 1 is a perspective view showing an external appearance of an embodiment of the present invention, and FIG. 2 is a cross-sectional view for explaining measures against heat radiation.

FIG. 1 is a perspective view from the back of the camera.
1 is a lens barrel, 2 is a heat radiator, 3 is a holding grip, 4 is an upper viewfinder, 5 is a main viewfinder, and 6 is a camera body. Although not shown in FIG. 2, a holder for holding the magneto-optical disk is provided in the camera body, and a recording device using the magneto-optical disk is built in.

FIG. 2 is a sectional view of FIG. A lens 10 is disposed inside the lens barrel 1, and a CCD 11 is attached to a focal position of the lens 10. A recording device 12 is provided behind the CCD. In other words, the recording device 12 is built in the camera body 6, and the lens barrel projects from the camera body in a certain direction.

Although the recording device 12 is omitted in the figure,
The apparatus includes a holder for the magneto-optical disk, a disk driving unit for rotating the magneto-optical disk, a pickup 13 for recording and reproducing data on and from the magneto-optical disk, and a driving unit for the pickup 13. Reference numeral 14 denotes a printed circuit board on which a drive circuit for the main electronic viewfinder 15 and the like are formed.

As described above, it is necessary for the recording apparatus 12 to consider the influence on heat from the principle utilizing the magneto-optical effect. Particularly, the influence of heat on the vicinity of the pickup 13 is important.

A main substrate 16 is arranged on the side of the lens barrel 1, that is, on the side of the lens 10. An electronic circuit for signal processing of the recording apparatus and an electronic circuit for controlling the entire camera are formed on the main board 16, and a semiconductor circuit (ASIC) 17 which is the center of the electronic circuit is
In particular, the calorific value is large. This is to perform high-speed processing. Here, the ASIC 17 is mounted on the main board 16 on the side opposite to the lens 10.

Reference numeral 18 denotes a heat radiating plate made of a metal such as aluminum to which the ASIC 17 is fixed, and a plurality of ridges 19 are formed to enhance the heat radiating effect. The ridge 19 is fitted into a groove 20 provided in the heat radiating portion 2 on the side of the lens barrel 1 and is exposed to the outside, so that the heat radiating effect is further enhanced.

As described above, the ASIC 17 which generates a large amount of heat is used.
Is located on the side of the lens barrel disposed in front of the recording device. Further, since the heat sink 18 of the ASIC 17 is disposed on the side of the lens barrel 1,
Heat is not stored inside the camera, and the influence of the heat generated by the ASIC 17 on the recording device 12 can be reduced. Also,
The transmission of heat to the recording device 12 and the CCD 11 is prevented by the main substrate 16. In other words, the main board 16 exerts the effect of a heat insulating material on heat generated by the ASIC 17 and the ASIC 1 of the main board 16
In the mounting surface 7, since the point where the heat radiating plate 18 is provided and a part of the heat radiating plate 18 are exposed to the outside, heat does not remain on the mounting surface side. In other words, by arranging ICs having a large heat value with respect to the main board 16 shown in FIG. 2 in order from the right front (a position far from the recording device 12), ICs having a small heat value are arranged on the left side.
Transfer of heat to the CCD 11 can be prevented.

The holding grip 3 is arranged so as to protrude from the camera body 6, and has a battery 21 stored therein. As shown in FIG. 2, when the holding grip 3 is properly held, the thumb is located on the back of the camera body, and the other finger fits into the constricted part 22 which is a joint with the camera body. Thus, when the camera is properly held, a distance can be provided between the heat radiating section 2 and the operator's hand.
Further, since the heat radiating plate 18 is not directly exposed to the outside, the heat radiating plate 18 does not touch the operator's hand.

[0017]

As described above, according to the present invention, it is possible to arrange components having a large amount of heat at a distant position in a recording apparatus which is easily affected by heat, and to arrange a heat sink. Thereby, the influence of heat generation on the recording apparatus can be further reduced. Further, since the positions of the heat generating portion and the heat radiating plate are not in direct contact, the human body is not affected by the heat generation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a sectional view showing one embodiment of the present invention.

[Explanation of symbols]

 1: lens barrel 2: heat radiating part 3: holding grip 5: camera body 12: recording device 17: ASIC (parts generating a large amount of heat) 18: heat radiating plate

Claims (3)

[Claims] 1. A camera body, a lens barrel protruding from the camera body, a part behind the lens barrel, which needs to consider the influence of heat disposed in the camera body, and the lens An electronic camera consisting of components that are likely to generate heat and are located on the side of the lens barrel. 2. The electronic camera according to claim 1, wherein a heat radiating plate is attached to the component having a high possibility of generating heat. 3. The electronic camera according to claim 2, wherein the camera body is provided with a holding grip for holding the camera, and a hand for holding the camera is separated from the heat sink when holding the camera. .