JPH0617366Y2 - Electronic still camera - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electronic still camera, and more particularly to an arrangement structure of components.

"Prior Art and Its Problems" In an electronic still camera, an image sensor and an imaging circuit convert an image signal into an electric signal, and the recording / reproducing circuit records the electric signal on a magnetic disk. For this recording, it is necessary to boost the battery voltage by a DC / DC converter and supply it to the image pickup circuit and the recording / reproducing circuit.

By the way, a DC / DC converter generally generates high-frequency electromagnetic noise due to its function of converting DC into AC and then converting it back into DC. This electromagnetic wave noise gives noise to the circuit of the recording / reproducing system and adversely affects recording or reproduction. Therefore, conventionally, it was necessary to make the emission shield on the DC / DC converter side and the defense shield on the recording / reproducing system circuit strict.

[Purpose of Invention] The present invention aims to reduce the load on the emission shield on the DC / DC converter side and the protection shield on the recording / reproducing system circuit side.

"Outline of the Invention" This invention focuses on the fact that the battery has a shielding effect against electromagnetic noise due to its structure among the elements that are always installed in electronic still cameras. It is characterized in that a battery is arranged between the circuit and the circuit.

That is, the battery always has a metal exterior,
This metallic exterior has a shielding effect against electromagnetic noise. Therefore, if this is installed between the DC / DC converter and the recording / reproducing system circuit, the emission shield load of the DC / DC converter and the protective shield load of the recording / reproducing system circuit can be reduced.

"Embodiment of the Invention" The present invention will be described below with reference to illustrated embodiments. The electronic still camera 11 having a flat box shape as a whole is
The taking lens 12, the finder optical device 13, and the strobe light emitting section 14 are located. Finder optical device 13
The eyepiece portion 15 is located on the rear surface. A release button 16 is provided on the upper surface of the electronic still camera 11, and a disc insertion lid 17 that can be opened and closed is provided.

Inside the electronic still camera 11, the DC
A / DC converter 20 is provided. And this DC / DC
A battery 21 is located on the right side of the converter 20,
A recording / reproducing system circuit 22 is provided at a position further to the right of the battery 21. As shown in FIG. 2, these three parties are connected so that the voltage of the battery 21 is boosted by the DC / DC converter 20 and the boosted voltage is supplied to the recording / reproducing system circuit 22.

As is well known, in the electronic still camera 11 described above, a subject image to be photographed is formed on the image sensor by the photographing lens 12. On the other hand, a subject image that is substantially the same as the captured subject image can be observed through the viewfinder optical device 13 and the eyepiece unit 15. Then, when the release button 16 is pressed, the optical signal of the subject from the taking lens 12 is photoelectrically converted by the image pickup device, and this electric signal is transferred to the magnetic disk inside the disk insertion lid 17 via the image pickup circuit and the recording / reproducing system circuit 22. Will be recorded. At the time of this recording, power is supplied to each circuit from the battery 21, and particularly, the recording / reproducing system circuit 22 is
The voltage boosted by the DC / DC converter 20 is supplied.

The DC / DC converter 20 generates high frequency electromagnetic noise when boosting the voltage of the battery 21, and this noise adversely affects the recording / reproducing system circuit 22. However, in the present invention, since the battery 21 is located between the DC / DC converter 20 and the recording / reproducing system circuit 22, the noise given from the DC / DC converter 20 to the recording / reproducing system circuit 22 side is reduced. . That is, the battery 21, whether it is a dry battery or a rechargeable battery, always has a metal exterior, and since metal generally has an electromagnetic shield function, at least a part of noise emitted from the DC / DC converter 20 is It is absorbed or reflected by the battery 21. Therefore, the adverse effect on the recording / reproducing system circuit 22 is reduced.

In other words, when the level of noise added to the recording / reproducing system circuit 22 is kept constant, according to the present invention, the DC / D
It is possible to reduce the load of the emission shield and the protection shield, which are to be provided on the C converter 20 and the recording / reproducing system circuit 22 itself, as compared with the conventional product. On the contrary, the same shield as the conventional one is used for the DC / DC converter 20 and the recording / reproducing system circuit 22.
In this case, the noise received by the DC / DC converter 20 in the recording / reproducing system circuit 22 becomes smaller, and better recording / reproducing can be expected.

In the present invention, it does not matter which type of battery the battery 21 is specifically made of. That is, a certain effect can be obtained if the battery has a metallic outer package. Further, the structure for inserting and removing the battery 21 does not matter.

Although the above-mentioned embodiment describes the time of recording, the same applies to the case where the electric signal recorded on the magnetic disk is reproduced by the recording / reproducing system circuit 22.

"Effect of device" As described above, the electronic still camera of the present invention has a battery having a magnetic shield effect between the DC / DC converter that generates electromagnetic noise and the recording / reproducing system circuit that is adversely affected by electromagnetic noise. Since it is provided, better recording / reproducing can be performed, or at least one of the emission shield load of the DC / DC converter and the protective shield load of the recording / reproducing system circuit can be reduced. Further, according to the arrangement of the present invention, among the elements of the electronic still camera, the relatively heavy battery is located on the center side of the camera, so that the electronic still camera having a good weight balance can be obtained.

[Brief description of drawings]

FIG. 1, FIG. 3 and FIG. 4 are a plan view, a rear perspective view and a front perspective view showing an embodiment of the electronic still camera of the present invention. FIG. 2 is a connection diagram of a battery, a DC / DC converter and a recording / reproducing circuit. 11 ... Electronic still camera, 12 ... Shooting lens, 13
...... Finder optical device, 14 ...... Strobe emission part, 1
5 ... Eyepiece, 16 ... Release button, 17 ... Disc insertion lid, 20 ... DC / DC converter, 21 ... Battery, 22 ... Recording / playback system circuit.

Claims (1)

[Scope of utility model registration request] 1. An electronic still camera comprising a battery, a DC / DC converter for boosting the voltage of the battery, and a recording / reproducing system circuit, wherein the DC / DC converter and the recording / reproducing system circuit are connected to each other. An electronic still camera featuring a battery.