JP2003158647A - Rear cover replacement digital camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear cover replacement digital camera provided with a photographing image monitor section, which has a configuration of needing no relay optical system for a finder. SOLUTION: The rear cover replacement digital camera is provided with a camera main body and a photographing image monitor section 50. The camera main body is fixed to a silver salt camera main body by replacing the rear cover. The photographing image monitor section 50 is turnably connected to the camera main body and turnable between 'folded position' folded on the surface of the camera main body and an 'opening position' open in the opposite direction from the folded position. When the photographing image monitor section 50 is at the 'opening position', since the monitor surface is placed toward an object (that is, a position apart from a photographer) from the surface of the camera main body, the photographing image monitor section 50 gives no hindrance with respect to the photographer for peeping an optical finder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back cover exchangeable digital camera device which can be replaced with a back cover of a silver halide camera and attached to enable digital photographing.

[0002]

2. Description of the Related Art In recent years, digital cameras have spread rapidly,
It is replacing the conventional silver halide camera. However, CCDs with high pixel counts are very expensive, so users who make large-scale works for reasons such as applying for contests are
I prefer to use silver salt film.

In view of such circumstances, it would be convenient if one camera could both shoot a silver salt film and a digital image. In order to meet these demands, a back cover exchangeable digital camera device
(Digital still back (DSB)) has been conventionally proposed. This makes it possible to take a digital image by replacing the back cover with a silver halide camera and attaching it.

In the conventional back cover exchangeable digital camera device, the photographing light passing through the photographing lens is imaged on the CCD through the relay optical system. This is a large C
Since there is no CD, placing the CCD directly on the focus plane results in extreme telephoto photography in which only the vicinity of the center of the image frame can be photographed. This is to avoid this.

If a relay optical system for such photographing light is required, the thickness of the back cover exchangeable digital camera device itself increases, and it becomes difficult to directly look into the finder at the time of photographing, and the relay is also applied to the finder optical system. An optical system is required. As a result, problems such as deterioration of the finder image and an increase in cost due to the provision of the two relay optical systems occur.

Recently, a large CCD has been developed, and it has become possible to dispose it directly on the focus surface, so that it is possible to eliminate the relay optical system for photographing light.
However, when the liquid crystal monitor is mounted on the interchangeable back cover type digital camera device, the thickness of the device increases, and a relay optical system for the finder is still necessary.

Here, even if the liquid crystal monitor unit 2 is rotatably connected to the device body 1 as in the case of the back cover exchangeable digital camera device 10 shown in FIGS. The device itself and its rotating mechanism 3 project from the surface of the device toward the photographer, which hinders the operation of looking into the viewfinder. Therefore, also in this case, a relay optical system for the finder is still required.

[0008]

SUMMARY OF THE INVENTION Therefore, the technical problem to be solved by the present invention is to provide a structure in which a relay optical system for a finder is unnecessary in a back cover exchangeable type digital camera device having a photographed image monitor section. Is to provide.

[0009]

[Means, Actions and Effects for Solving the Problems]
The present invention has been devised to effectively solve the above problems and provides a back cover exchangeable digital camera device having the following features.

The back cover exchangeable digital camera device of the present invention includes a "device body fixed to the camera body by replacing the back cover", "a" folding position "to be folded on the surface of the device body and the folding. From the position to the "open position" opened in the opposite direction, and is connected to the side of the main body of the apparatus. When the captured image monitor unit is in the “open position”, the monitor surface is located closer to the subject than the surface of the apparatus main body (that is, a position farther from the photographer).

In the interchangeable back cover type digital camera device of the present invention having the above-mentioned structure, when the photographed image monitor section is positioned at the "open position" at the time of photographing, the monitor surface is the surface of the main body of the apparatus (that is, the back cover). It is located closer to the subject than the back of the camera body with the interchangeable digital camera device attached. Moreover, since the photographed image monitor section is connected to the side of the apparatus body, the connection mechanism section does not project from the apparatus surface to the photographer side. Therefore, the photographed image monitor unit and the connecting mechanism unit do not prevent the operation of looking into the finder at the time of photographing, and therefore the relay optical system for the finder is not necessary.

[0012]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 3 to 5 are a front view, a bottom view, and a back view of a back cover exchangeable digital camera device (hereinafter, referred to as DSB) 20 according to an embodiment of the present invention, respectively. As shown in FIG. 6, the DSB 20 is attached by replacing the back cover of the silver halide camera body 7. Therefore, the front surface (FIG. 3) constitutes the back surface side of the camera when mounted on the camera body 7. The back side (Fig. 5) is
It is located inside the camera body 7. The DSB 20 is attached to the camera body 7 using the hinge shaft 21 and the lock claw 22.

On the back surface of the DSB 20, there is provided a projecting portion 25 which can be accommodated in the cartridge chamber when it is mounted on the camera body 7. An electronic circuit is housed in the projecting portion 25, and the power supply terminal 26 arranged at the tip of the electronic circuit comes into contact with a power supply terminal (not shown) exposed in the cartridge chamber. An image pickup device (CCD) 35 is arranged on the pressure plate 30. The crimping plate 30 and the CCD 35 are connected via a focus adjusting mechanism described later.
The crimping plate 30 has the same outer shape as the crimping plate provided on the back cover of the camera body 7, and abuts on the contact surface of the camera body 7 on the crimping plate side to ensure the focus position of the CCD 35.

A signal terminal 38 arranged near the hinge shaft 21.
Exchanges signals with the camera body 7. A battery 39 for memory is built in below it (see FIG. 5).

As shown in FIG. 3, a grip 42 is provided near the hinge shaft 21 on the front side of the DSB 20,
A card lid 43 that can be opened and closed in a hinged manner is arranged on the opposite side. A recording medium (not shown) for recording the captured digital image can be mounted in the DSB 20, and the recording medium can be opened and closed by opening and closing the card lid 43.

A liquid crystal monitor 50 for displaying a photographed image is rotatably connected to the side of the DSB 20. Lcd monitor
The 50 has an LCD 51 in the center and has two arm portions 55a and 55a.
It is connected to the main body of the DSB 20 via a relay shaft 55 including b. As shown in FIG. 4, the rotation axis A connecting the connecting points at the tips of the arms 55a and 55b is offset from the plane including the LCD 51. That is, the rotation axis A is the LCD
It does not exist on the plane including 51, but exists at a position displaced from it.

As a result, when the liquid crystal monitor 50 is in the "open position" shown by the solid line in FIG. 4, the surface of the liquid crystal monitor 50 is the surface of the DSB 20 (the surface on which the operation members 41a to 41d are arranged).
It will be closer to the subject than the subject. Therefore, the liquid crystal monitor 50 does not interfere with the operation of looking into the finder 8 provided on the back surface of the camera body 7. Such advantages can be clearly understood by comparing with the configuration shown in FIG.

Further, in the structure shown in FIG. 2, the rotating mechanism 3 largely projects from the surface of the DSB body 1 toward the photographer,
This was an obstacle to the action of looking into the finder. On the other hand, in the DSB 20 of the present invention, the liquid crystal monitor 50 is connected to the side of the apparatus main body and does not project to the photographer side. In other words, the mechanism for connecting the liquid crystal monitor 50 to the DSB 20 does not interfere with the shooting operation.

In FIG. 4, the liquid crystal monitor 50 is shown both in the "open position" (solid line) and in the "folded position" (broken line). The operation members 41a to 41d for digital photography arranged on the surface of the DSB 20 are
The liquid crystal monitor 50 is arranged so that it can be easily operated regardless of whether it is in the "open position" or in the "folding position" (see FIGS. 3, 6, and 7). Since the liquid crystal monitor 50 is also rotatable with respect to the relay shaft 55 via the shaft member 56, the liquid crystal monitor 50 itself is rotated from the "open position" shown by the solid line in FIG. It is possible to move to the “folding position” indicated by the broken line by rotating the body around the axis of rotation B by 180 ° and further rotating around the axis of rotation A by 180 °.

The "folded position" shown by the broken line in FIG. 4 corresponds to the rear view of the camera shown in FIG. From the state in the "open position" shown by the solid line in FIG. 4, the liquid crystal monitor 50 is not rotated about the rotation axis B but is rotated by 180 ° about the rotation axis A.
It can also be rotated, in which case the folded state shown in FIG. 6 is obtained.

Focus Adjustment Next, the focus adjustment mechanism of the CCD 35 will be described with reference to FIGS. 5, 8 and 9. As shown in FIG. 5, the CCD 35 is fixed to the main body of the DSB 20 via the pressure plate 30. The crimping plate 30 is fixed on the back cover 20b of the DSB 20 main body by crimping plate fixing screws 31a to 31c.
A base plate 37 holding the CCD 35 and its substrate 36 is fixed to the crimp plate 30 via focus adjusting screws 32a to 32c. FIG. 8 shows D on the surface including the crimp plate fixing screw 31.
FIG. 9 is a sectional view of an essential part of SB20, and FIG.
FIG. 4 is a cross-sectional view of a main part of the DSB 20 on a surface including the. As shown in FIG. 8, since the spring 131 is arranged between the back cover 20b and the crimping plate 30, the crimping plate fixing screw 31a is provided.
By adjusting ~ c, the crimp plate 30 for the back cover 20b
You can adjust your posture. On the other hand, as shown in FIG. 9, since the spring 132 is arranged between the crimping plate 30 and the base plate 37, the attitude of the CCD 35 with respect to the crimping plate 30 can be adjusted by adjusting the focus adjusting screws 32a to 32c. Can be adjusted. DSB is used as the standard camera body in the manufacturing process at the factory.
Attach the 20 and take a digital picture of the chart installed at a predetermined distance. Focus adjusting screws 32a to 32c are adjusted based on the obtained image, and the screws are fixed with an adhesive or the like when a proper image is obtained. With that, the focus adjustment is completed.
Since the CCD 35 is attached to the DSB 20 via the pressure bonding plate 30, the focus position does not shift even if the camera body to which the DSB 20 is attached changes.

Another Embodiment Next, a DSB 120 according to another embodiment of the present invention will be described with reference to FIGS. 10 to 12 are shown in FIGS.
The DSB 120 corresponds to, and shows a front view, a bottom view, and a back view of the DSB 120.

In this embodiment, the liquid crystal monitor 150
The relay shaft 155 of the above is provided on the card cover 143. In other words, the liquid crystal monitor 150 is connected to the DSB 120 via the card cover 143.
It is connected to the body. By operating the lock release button 142, the card lid 143 can be opened in a hinge manner, and at that time, the relay shaft 155 also rotates together with the card lid 143. By opening the card cover 143, a recording medium (not shown) for image recording can be attached to and detached from the DSB 120.

The card cover 143 may be detachably attached to the DSB 120. In that case, the LCD monitor 150 is also D
It can be removed from the SB120 body. Therefore, the liquid crystal monitor 150 can be removed at the time of shooting, and the liquid crystal monitor 150 can be attached at a later time to check the shot image. Optical finder 8
(See Fig. 6 and Fig. 7)
The shooting itself can be performed even when the liquid crystal monitor 150 is removed. By making the liquid crystal monitor 150 detachable, the weight of the camera at the time of shooting can be reduced, and the burden on the photographer can be reduced.

The DSB 120 further includes a CCD protective cover 160. This will be described below. The protective cover 160 mainly protects the CCD 135 exposed on the surface of the DSB 120 when the DSB 120 is removed from the camera body. Protective cover 160
Is secured to the surface of the DSB 120 using a generally known securing mechanism that utilizes hooks and recesses.

The protective cover 160 can be selectively attached at two positions on the surface of the DSB 120. One is the figure
This is a position shown by a broken line in FIGS. 11 and 12 to cover and protect the CCD 135. The other is the position shown by the solid line. This is the position when the DSB 120 is attached to the camera body, and the protective cover 160 protruding from the surface of the DSB 120 is housed in the cartridge chamber. As described above, by fixing the protective cover 160 to two positions, it is possible to prevent the storage place of the protective cover 160 at the time of digital photographing, and prevent loss or the like.

The protective cover 160 can be detached from the fixed position by pushing the removal button 161 from both sides to change the attachment position.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a DSB according to a conventional example.

FIG. 2 is a diagram illustrating a DSB according to a conventional example.

FIG. 3 is a front view illustrating a DSB according to an embodiment of the present invention.

FIG. 4 is a bottom view of the DSB of FIG.

5 is a rear view of the DSB of FIG.

6 is a rear view of a camera to which the DSB of FIG. 3 is attached.

7 is a rear view of a camera to which the DSB of FIG. 3 is attached.

FIG. 8 is a cross-sectional view of an essential part for explaining focus adjustment of the DSB of FIG.

FIG. 9 is a cross-sectional view of an essential part for explaining the focus adjustment of the DSB of FIG.

FIG. 10 is a front view illustrating a DSB according to another embodiment of the present invention.

11 is a bottom view of the DSB of FIG.

12 is a back view of the DSB of FIG.

[Explanation of symbols]

1 DSB (digital still back) body 2 LCD monitor 3 rotation mechanism 7 Silver salt camera body 7a Silver salt camera body outer cover 8 finder 10, 20, 120 DSB 20a Front cover 20b back cover 21 hinge shaft 22 lock claws 25 Projection 26 Power terminal 30 crimp plate 31 Crimping plate fixing screw 32 focus adjustment screw 35, 135 CCD 36 CCD substrate 37 Base plate 38 Signal terminal 39 Memory battery 41 Digital photography operation member 42 grip 43,143 Card lid 50, 151 LCD monitor 51, 151 LCD 55, 155 Relay shaft 55a, 55b arm 56 Shaft member 131, 132 Spring 142 Unlock button 160 protective cover 161 Remove button

Claims (5)

[Claims] 1. A back cover exchangeable digital camera device capable of photographing a digital image by replacing the back cover of a camera body capable of shooting a silver salt film with the back cover of the camera body. Connected to the side of the device body so that the device body can be fixed between the folded position and the folded position on the surface of the device body, and the open position opened in the opposite direction from the folded position. The back cover exchangeable digital camera, characterized in that, when the taken image monitor section is in the open position, the monitor surface is located closer to the subject than the surface of the main body of the apparatus. apparatus. 2. The photographed image monitor section is connected to the apparatus main body via two arm sections whose front ends are rotatably connected to the apparatus main body, and the apparatus having the two arm sections. The rotation axis that connects the connection point to the main body is
The back cover exchangeable digital camera device according to claim 1, wherein the back cover exchangeable digital camera device is offset from a plane including a monitor surface. 3. The apparatus main body is provided with a lid member for inserting / removing a recording medium contained therein, and the photographed image monitor section is provided on a side of the apparatus main body through the lid member. The back cover exchangeable digital camera device according to claim 1, wherein the back cover exchangeable digital camera device is connected. 4. The back cover exchangeable digital camera device according to claim 4, wherein the cover member is attachable to and detachable from the main body of the device. 5. The apparatus main body comprises a protective cover for protecting the image pickup device exposed on the surface, so that when the apparatus main body is attached to the camera main body, the protective cover is housed in the cartridge chamber on the camera main body side. The back cover exchangeable digital camera device according to claim 1, further comprising a fixing mechanism for disposing and fixing the protective cover on the device body.