JPS59126375A - Electronic still camera - Google Patents

Abstract

PURPOSE:To offer an electronic still camera with ease of handling at pickup by arranging a shutter section and a mirror mechanism section to an apron section, and arranging an image pickup element, electric circuit system and a magnetic recording device to a body section to satisfy a function requested to the form of camera. CONSTITUTION:The mirror mechanism section 1 consists of a mirror 1-1 and a driving section 1-2; the shutter section 2 consists of a wing running board 2-1 and a control mechanism section 2-2, and they are stored in the apron section 4. The image pickup element 6-1 is fitted on the board 6-2, to which a circuit for pickup and magnetic recording is provided. The image pickup element 6-1, the electric circuit system 6 and the magnetic recorder 7 are stored in a body section 8. Since the image pickup element 6-1 has 1/9-1/16 of area ratio in comparison with a 35mm. film, the mirror mechanism section 1 and the shutter section 2 are constituted in a small size. Since they are stored in the apron section 4, the body is convenient for gripping and since the mechanism is shared in the apron section 4 and the electric circuit system 6 and the magnetic recorder 7 are shared in the body section 8, the weight is well balanced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a monocular lens 7 having a focal plane.
This relates to the internal arrangement of the internal mechanism of a type of electronic still camera.

In recent years, so-called electronic still cameras have been proposed as filmless cameras that use an imaging element and a magnetic recording device in place of the silver halide film of conventional still cameras. This electronic still camera is constructed by combining a part of a conventional still camera with a part of a video camera, that is, an image sensor and a magnetic recording device. The problem is how to arrange the components of the still camera and the components of the video camera.

That is, in the case of a conventional single-lens reflex still camera, its main components can be roughly divided into four parts: a mirror mechanism section, a shutter section, a film winding section, and a finder optical section. The optical parts and mechanical parts occupied most of the volume, and the electrical parts were placed in gaps within the machine, and their volume was small compared to the optical and mechanical parts.

On the other hand, in the case of a video camera, the image sensor, magnetic recording device, and associated electrical circuit (hereinafter referred to as the electrical circuit system) are more important than the optical components and mechanical components for imaging.
occupies most of the volume.

In electronic still cameras, the imaging element, magnetic recording device, and electric circuit system that occupy most of the space in conventional video cameras replace the film in conventional silver-halide film cameras. The mirror mechanism section, shutter section, and finder optical section, which occupy most of the volume of the still camera, are left as they are.

Considering the arrangement of such an electronic still camera,
Various forms can be considered depending on how the constituent parts (mirror mechanism part, shutter part, finder optical part, image sensor, electric circuit system, and magnetic recording device) are arranged.

FIG. 1 shows an example of the structure of an electronic still camera with a very conventional arrangement based on the structure of a conventional single-lens reflex still camera. In the figure, (l) is a mirror mechanism section, (21 is a shutter section, (41 is an apron section, (4-1) is a mount for attaching an interchangeable lens), t61 is an image pickup device and an electric circuit system,
(7) is a magnetic recording device, and (8) is a body portion.

Here, the apron portion is a portion on the front surface of the camera body that is provided with a mount for attaching an interchangeable lens or a photographic lens, and that protrudes forward from other portions of the front surface of the camera body.

Incidentally, FIG. 1 shows the arrangement of the electronic still camera in a plane cross section in correspondence with a drawing 6-a of the embodiment of the present invention to be described later, and the finder optical section is not shown.

The arrangement of this component is such that the film of a conventional single-lens reflex camera is replaced with an image sensor (6-1), the magnetic recording device 171 is placed at the rear, and the image sensor and the image sensor are placed in the take-up spool chamber and cartridge chamber, which are no longer used. The electric circuit system (61) is arranged. Therefore, the mirror mechanism part (1) and the shutter part (2) are divided into the left and right parts of the electric circuit system (61), and the structure of the electric circuit system (6) is becomes more complex, and the number of wiring between the left and right printed boards increases, which not only requires securing space, but also increases the number of assembly steps associated with wiring. , conventional 1
Compared to an eye-reflex still camera, the thickness of the recording section, that is, the electric circuit system +61 and the magnetic recording device (21) is increased, so both sides of the camera are thicker, which makes it easier to hold the camera when taking pictures. There is a problem that it disappears.

As described above, in the past, the most suitable arrangement of internal mechanisms for electronic still cameras had not been sufficiently studied. The present invention was invented in view of this situation, and By arranging the components most suitable for a still camera, an electronic still camera is provided that satisfies the functions required for the form of the still camera and is easy to handle during photographing.

In general, the main functions required for the form of a still camera are: tl + easy to hold the camera.

Fits +21 hands.

(3) Good weight balance, etc.7. If you refer to Figure 2, which shows the situation when a large number of people hold a camera model, you can see that most people hold both sides of the camera body when taking pictures.
I can see that you are there. In addition, in the same figure, the solid line, dashed line, and dashed-dotted line indicated on both sides of the °C1 camera body are indicated by n, respectively.
, indicates the position of the finger. Therefore, the thickness of the body line part in the same figure is 35 Ill/r1 for the current silver halide film.
If the thickness is about the same as that of a single-lens reflex still camera, it will be easier to hold and it will fit more tightly.In consideration of these factors and weight balance, the present invention has been designed as follows. It is structured.

That is, the electronic still camera according to the present invention achieves the above object by arranging the shutter section and the mirror mechanism section in the apron section, and arranging the image sensor, electric circuit system, and magnetic recording device in the body section. There is.

Embodiments of the present invention will be described below based on the drawings.

Figure 3-a, Figure 5-b, Figure 3-a and Figure 6-d
The figures are a plan view, a front view, a side view, and a perspective view of an electronic still camera according to an embodiment of the present invention.
It shows °C. It should be noted that each of the figures except for Figures 1 and 6 are shown in a transparent state to make it easier to understand the internal structure thereof.

The mirror mechanism section (1) is composed of a mirror (1-1) and its driving section (1-2). t, shutter section (
21 is composed of a shutter blade traveling board (2-1) and a shutter control mechanism section (2-2). And these mirror mechanism part (1) and shutter part (21 are stored in the apron l [4+] of a conventional single-lens reflex still camera)
There are 1. (3; is the finder optical section, and the focus plate (5-
1), pentaprism (5-2), eyepiece (3-3)
), goo thong covering the top and sides (3-4)
It becomes more.

In this embodiment, the rainbow 13 flap (4), the finder optical section (:(), and the body section (81) are integrally constructed, but
Of course, each can be attached and detached so that it can be used with various finders (for example, eye level finder, waist level finder, finders with different eye points, etc.) or various body parts (8
1 can be attached as appropriate.

In addition, in Fig. 3-b, (5) is the mirror mechanism part +1
This is a motor that transmits power to the shutter section (2) through a known transmission means.

The image sensor and electric circuit system (6) is the image sensor (6-1)
is mounted on the board (6-2), and this board (6-2)
The device is further equipped with a circuit for imaging and a circuit for magnetic recording.

The magnetic recording device (1) is a magnetic recording device having a magnetic sheet (7-2) and a magnetic sheet hub (7-4) inside.
(7-1) and a magnetic head (7-3). The magnetic sheet cassette (7-1) is detachably attached to the camera, and when attached to the camera,
The magnetic jet knob 1 (7-4) and a rotating shaft (7-5) are connected, and this rotating shaft (7-5) is connected to a large pulley (
7-6), power transmission belt (7-7), small pulley (
7-8) to a magnetic sheet rotation motor (not shown) provided separately from the motor 151. Therefore, the rotational force of the magnetic seat rotation motor is transmitted to the rotating shaft (7-5) via each of the above-mentioned transmission mechanisms. 7
-3) rotates, the hot air head (7-2) comes into contact with it, and the signal from the image sensor (6-1) is transmitted to the magnetic sheet (7-3).
3) Write 2'L6゜These image sensors (6-1)
and electric circuit system 16) and magnetic recording bag ft'71,
It is housed in the body part of a conventional single-lens reflex still camera.

By the way, the size of the image sensor (6-1) that replaces the silver halide film is ix vertical length 8.8 at the current stage of practical use.
x6.6~127x9.5 (rrynE1 degree Te,
36 of conventional 35 rrIn film:<24
(mm) in area ratio 1/9 to 1/16
That's about it. Therefore, the mirror mechanism section il+ and the shutter section (2) can be made considerably smaller than that of a conventional single-lens reflex still camera. Since such a small mirror mechanism part +I+ and shutter part (21) are all housed in the apron part (4), the body part (21) of the mirror mechanism part (1) and shutter part (2) shown in FIG.
Since the space occupied by the 81 can be utilized, the body part (both side parts of the 81) can be made into a shape that is suitable for holding with the hands and has a thickness that fits the hand. , a mechanism part, that is, a mirror mechanism part (1),
The shutter part (2) is connected to the apron part (41), and the electric circuit system (
61. Since the magnetic recording bag w (7) is distributed to the body part (8), the weight balance is also maintained.

In addition, in this embodiment, as shown in Fig. 3-b, the apron part (mirror mechanism part (!) on the left side when facing 41, shutter control mechanism part <2-2 on the right side), and the motor (5) on the bottom part.
), but by reversing this arrangement, the shutter control mechanism section (2-2) is placed on the left side, and the mirror mechanism section i is placed on the right side.
l+ may be placed. Furthermore, there is a motor (51) on the right side, a mirror mechanism part (I) on the left side, and a shutter control mechanism part (I) on the bottom part.
2-2), and place the mirror mechanism part (1) on the right side.
, motor 1711 on the left side, shutter control mechanism section on the bottom (
2-2) may also be used. Furthermore, by adopting such an arrangement, it can be expected that the assembly man-hours will be reduced due to unitization and that maintenance management will become easier. In other words, the apron part (41) has the mirror mechanism part (1), which is the main mechanical part, and the shutter part (2), which is used as the first unit, and the body part (81) has the main mechanical part (1) and the shutter part (2), which is the main mechanical part. The image sensor (6-1), the electrical circuit system 1 (jl), and the magnetic recording device (7), which are the crowded electrical circuit parts, are distributed, and the second unit is set as the first unit. unit and the second
By assembling the units in the assembly process, the time required for the assembly process can be shortened, and the units can be replaced during repairs, making maintenance management easier.

FIG. 4 is a perspective view of an electronic still camera according to another embodiment of the present invention. In this embodiment, the apron part (41), the image sensor (6-1),
Electric circuit system +61 and magnetic recording device! The body part (81) that houses the 71 is configured to be detachable.Furthermore, the body part (41) is configured to be detachable from the body (9) that incorporates the conventional silver halide film. ,ing.

The apron part (11) is the body part (81 or the bore part 4 (
When installing it on the gl, use the body part) or the body part (
1) One of the claws 411+1 attached to the upper part of the front face of I fixes the nib part (41) to ensure secure installation. A gear (5) attached to the output shaft at one end of the motor (5)
-1), when the nib 1 contact part (41) is attached to the body part (81 or body part (9)), it will mesh with the gear (111 or gear (13)) attached to the lower front part. A driving force for moving the head (7-3) (see Figure 6-a) is supplied to the body part (8) via the gear (11), and a gear (13) is supplied to the body part (91). )
The driving force for winding the film is supplied through the

According to this embodiment, it is possible not only to provide a camera form that is easy to hold as in the previous embodiments, but also to provide a camera that allows the user to select a photo recording method depending on the purpose of photography. In other words, when high resolution is required, such as for academic photographs and document records, the apron section (4
1 is combined with the body part (9) containing the silver halide film,
In cases where immediacy is required, such as in news photography, it is possible to record photographs by combining the body (8) with a built-in magnetic recording device (1) (see Figure 3-a) on the apron section. The method can be arbitrarily selected.

In the above description, a single-lens reflex type device has been described, but the present invention can also be applied to a see-through finder type device. At that time, only the shutter section is placed in the nib 1 cone section. Furthermore, the present invention can also be applied to an electronic still camera that uses the shutter function of the image sensor and does not have a separate shutter mechanism. At that time, only the mirror mechanism section is arranged in the apron section.

As described above, in the electronic still camera according to the present invention, the mirror mechanism section and the shutter section are arranged in the apron section, and the image sensor, the electric circuit system, and the magnetic recording device are arranged in the body section. The armpit thickness can be set to an appropriate thickness, and the weight is well balanced, so it has the advantage of being very easy to handle when shooting.

Furthermore, since it is easy to unitize, it is highly effective in reducing man-hours and facilitating maintenance management.゛7''t, The apron part and the body part have a separate structure, and both can be attached and detached (in addition, a body part with a built-in silver halide film is prepared separately so that the apron part can be shared). For example, it is possible to select a photographic recording method according to the purpose of photographing.If the finder optical system is designed to be detachably attached to the apron, various finders can be attached according to the purpose.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the structure of an electronic still camera arranged based on the structure of a conventional single-lens reflex still camera, Fig. 2 is an explanatory diagram showing how the user holds the camera, and Fig. 3-a.
Figures 3-b, 3-a, and 3-d are respectively a plan view, a front view, a side view, and a perspective view of an electronic still camera according to an embodiment of the present invention. 4 are perspective views of an electronic still camera according to another embodiment of the present invention. m...Mirror mechanism section, (21...Shutter section, 13
1... Finder optical section, (41... nib-con unit, trn motor, +61... image pickup element and electric circuit system, (7)... magnetic recording device, (81... body Department. Agent: Patent Attorney Saburo Kimura 1 Figure 7z Figure゛・/ゝ＼ O3-α Figure Sai 3-b Figure

Claims (1)

[Scope of Claims] [11. A mirror mechanism section and a shutter section for guiding the light passing through the photographing optical system to the finder optical system are disposed in the apron section, and an image pickup element, an electric circuit system, and a CB magnetic recording device body section are arranged. An electronic still camera characterized by the following: (2) An electronic still camera according to claim 1, wherein the apron part and the body part are separated and detachable. An electronic still camera according to claim 1 or claim 2. (41) Claim 1, wherein the electronic still camera has a structure in which a finder optical part is detachably attached. The electronic still camera according to item 1 or 2.