JPH11223867A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of easily confirming a connection state between a camera main body and respective photographing units and immediately obtaining information necessary for photographing. SOLUTION: A camera monitor 65 is displayed on the liquid crystal panel 57 of a film holder 4. The monitor 65 is constituted of marks 78 to 81 respectively showing photographing units such as a camera main body 3, the holder 4, a lens unit and an AE fider, etc. A user is informed of the connection or the non-connection of the respective photographing units according to the display or the non-display of the marks or the change of the display. Whatever information is displayed on a wide use display part 63, display is changed over to the display for an ISO value or a diaphragm value and a shutter speed (AV/TV value) by operating a display changeover switch 75.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly, to a camera in which each part of a photographing mechanism is unitized.

[0002]

2. Description of the Related Art A lens shutter type single-lens reflex camera is known as a camera having a large screen size using a brownie film. This single-lens reflex camera comprises a camera body, a lens unit with a built-in shutter mounted on the camera body, a film holder for storing a photographic film, and a plurality of photographing units such as an AE finder having an automatic exposure mechanism. By appropriately combining these units, a system camera capable of coping with shooting under various conditions is provided. Electrical connection between the camera body and each photographing unit is made by a connector provided in each of them, and each photographing unit is controlled by a control circuit built in the camera body.

The above-mentioned camera is provided with a liquid crystal panel on which various data such as the number of shots, the sensitivity of the photographic film, the photographic size, the aperture value, the shutter speed, and the type of data to be imprinted on the photographic film are displayed. This liquid crystal panel is incorporated in a film holder. The film holder is provided with a display switch for switching the display content of the liquid crystal panel between the photographic film sensitivity information and other information.

In the above-described system camera, the camera may not operate properly due to contamination of the connector or connection error. Therefore, conventionally, the user is notified of OK / NG of the connection of the film holder to the camera body depending on whether or not the number of shots is displayed on the liquid crystal panel of the film holder.

[0005]

However, the camera of the new system displays the number of shots and various information on the liquid crystal panel even when the film holder is a single unit. Cannot be used to display the connection status. In addition, only the connection state of the film holder can be displayed with the presence / absence of the number of shots displayed, so that the connection state of the other shooting units cannot be checked, which is inconvenient. Although the connection status of other photographing units can be displayed depending on whether or not the number of photographed images is displayed, there is a problem that a photographing unit having a connection error cannot be immediately confirmed.

When the contents displayed on the liquid crystal panel are switched by operating the display changeover switch, information previously displayed is displayed in the information display other than the sensitivity information. Therefore, if information that is less necessary at the time of shooting, such as date and time, is displayed last time, it is necessary to switch this to information necessary at the time of shooting, such as shutter speed and aperture value. Met.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a camera which can easily check a connection state between a camera body and each photographing unit and can immediately obtain information necessary for photographing. Aim.

[0008]

In order to solve the above-mentioned problems, a camera according to the present invention comprises a liquid crystal panel provided in any one of the photographing units, and a mark indicating each photographing unit name or each photographing unit. Is displayed, and by changing the display state of these marks, connection / non-connection between the camera body and each photographing unit is represented. Also, when the information on the liquid crystal panel is switched to an information display other than the ISO information, the aperture value and the shutter speed are always displayed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2 which is an external view of a lens shutter type single-lens reflex camera embodying the present invention, and FIG.
Includes a camera body 3, a film holder 4 attached to the back side of the camera body 3, a lens unit 5 attached to the front side of the camera body 3, and an AE finder 6 attached to the upper part of the camera body 3. The system camera is configured by a combination of photographing units.

The camera body 3 comprises a box-shaped body 8 and a focus adjustment mechanism 9 provided below the body 8. A control circuit for controlling the mirror mechanism, the camera body 3, the connected film holder 4, the lens unit 5, the AE finder 6, etc. is incorporated in the main body 8. This control circuit includes a CPU, ROM, RAM,
It is composed of various circuits. Openings 10 and 11 are formed on the front side and the back side of the camera body 8, respectively, and a photographing optical path is shielded between the front side opening 10 and the lens board 12 constituting the focus adjustment mechanism 9. Bellows 13 are attached. The film holder 4 is attached to the opening 11 formed on the back side of the main body 8 so as to face the opening.

The lens unit 5 is mounted on the front surface of the lens board 12 and is locked by a lock lever 15 provided on the lens board 12. The lens unit 5 includes a photographing lens 16, a shutter device 17 also serving as a diaphragm incorporated therein, and an EEPROM for shutter that stores the number of operations of the shutter device 17.
(Not shown). Since the shutter device 17 is open at the time of non-photographing, the subject light passing through the photographing lens 16 is transmitted to the lens board 12, the bellows 13, and the aperture 10.
And enters the main body 8.

A shutter device 17 and an EEPROM of the lens unit 5 and a control circuit built in the camera body 3 are electrically connected to the rear side of the lens unit 5 and the front side of the lens board 12. Contact part 1 for
9 and 20 are provided. The lens board 12 and the camera body 3 are electrically connected by a wiring cord contained in the bellows 13.

A mirror mechanism 24 including a light shielding plate 22 for closing the opening 11 in a light-tight manner and a mirror 23 for changing the optical path of subject light is disposed in front of the opening 11 on the rear side in the main body 8. . The light-shielding plate 22 and the mirror 23 are rotated about the axis attachment portion 25 in the closed position where the opening 11 is closed and the subject light is reflected upward from the main body 8 in the arrow X direction in the figure. The opening 11 is freely movable between the opening position and the opening position. The light shielding plate 22 and the mirror 23 at the time of non-photographing are in the closed position and shield the inside of the film holder 4 from light. The mirror mechanism 24 is driven by a motor 24a.

A focusing glass 26 is fitted on the upper surface of the main body 8, and the subject light reflected by the mirror 23 is focused on the focusing glass 26. On the upper surface of the main body 8, a foldable waist level finder that makes it easier to see the focus glass 26 from above, an angle finder that converts an image formed on the focus glass 26 into an eye level, and an automatic exposure An AE finder 6 or the like having a function is mounted according to shooting conditions and applications.

The AE finder 6 is a finder optical system equivalent to an angle finder that bends the subject light formed on the focusing glass 26 so as to be viewed as an erect image. The AE finder 6 is formed on the focusing glass 26. A light receiving element for measuring the brightness of the subject light, and controlling the light receiving element, and determining a shutter speed based on a photometric value of the light receiving element and an aperture value set by the lens unit 5 to control the camera body 3. It is composed of an AE finder control circuit and the like input to the circuit.

The finder optical system of the AE finder 6 has a built-in display meter for displaying the aperture value and the shutter speed, so that the user can check the aperture value and the shutter speed while looking through the AE finder 6. Further, contact portions 29 and 30 for electrically connecting a control circuit of the AE finder 6 to a control circuit in the camera main body 3 are provided on a lower portion of the AE finder 6 and an upper surface of the camera main body 3, respectively. I have.

On one side surface of the main body 8, a shutter speed adjusting dial 32 for switching between a shutter speed and an AE mode, and a mode switching for turning on / off a power supply of the camera 2 and a film winding mode. An operation panel 36 is provided with a dial 33, a mirror up switch 34 for forcibly swinging the mirror 23 in the main body 8 to the open position, a release switch 35, and the like.

A focus glass 26 is provided on the upper surface of the main body 8.
A liquid crystal panel 37 for displaying the state of the camera such as whether shooting is possible or not and the warning and error such as the remaining battery power and abnormal exposure are provided on the side of the camera. The liquid crystal panel 37 is provided on the liquid crystal panel 37 so that display contents can be confirmed even in a dark place.
A backlight that illuminates from behind is incorporated.

The focus adjusting mechanism 9 includes a base 40 attached to the lower surface of the main body 8 and a pair of focusing rails 4 protruding forward from the base 40.
1 and 42, and a slide portion 43 which is movable along the focusing rails 41 and 42 and has the above-mentioned lens board 12 mounted thereon. An operation knob 44 that is operated to move the slide portion 43 along the focusing rails 41 and 42 is rotatably attached to the side of the slide portion 43. This operation knob 4
A pinion gear (not shown) is coaxially mounted on the focusing rail 4.
1, 42 mesh with a rack gear 45 formed on the upper surface. Thus, when the operation knob 44 is rotated, the slide portion 43 moves along the focusing rails 41 and 42, and focus adjustment is performed by changing the distance between the camera body 3 and the lens unit 5.

The lens board 12 is mounted on a frame part 47 mounted on the upper part of the slide part 43. The frame portion 47 is slidable and rotatable in a left-right direction orthogonal to the sliding direction of the slide portion 43. The lens board 12 is attached to the frame unit 47 so as to be rotatable in a vertical direction perpendicular to the rotation direction of the frame unit 47. Thus, the camera 2 can perform tilt shooting without using any special device.

In the film holder 4, a film loading chamber 50 in which a brownie-size photographic film 49 is loaded.
And a control circuit for controlling each part of the film holder 4. This control circuit includes a CPU, ROM, R
AM and various circuits. In the film loading chamber 51, an aperture 51 for defining an exposure range for the photographic film 49 is provided. Various sizes of masks are attached to the aperture 51, and the photographing size can be changed as appropriate. In front of the aperture 51, when the film holder 4 is removed from the camera body 3, a light-shielding lid 52 that blocks light between the opening 11 of the camera body 3 and the aperture 51 is inserted. The light-shielding lid 52 is removed from the film holder 4 at the time of photographing.

Further, the film holder 4 is rotatable with respect to the camera body 3 around the photographing optical axis.
Thus, by rotating the film holder 4 without changing the position of the camera 2, it is possible to switch the vertical and horizontal directions of the shooting screen. The display range of the focus glass 26 is also switched between vertical and horizontal in conjunction with the rotation of the film holder 4.

Further, the first frame of the photo film 49 is set in the aperture in the film holder 4, and the photo film 49 is wound up by one frame for each photographing.
Furthermore, after all frames have been shot, the photo film 49 is displayed.
Is built in.
The winding mechanism 53 is driven by a motor 53a. Contact portions 54 and 55 are provided on the back side of the camera body 3 and the front side of the film holder 4 so that the control circuit in the camera body 3 and the control circuit in the film holder 4 can be electrically connected. Is provided.

As shown in FIG. 1, a liquid crystal panel 57 for displaying various information of the loaded photographic film 49 and information of the camera 2 itself is provided on the upper surface of the film holder 4.
An operation panel 58 provided with various switches for setting the camera 2 and switching display contents is provided. In addition, a backlight, which is an illuminating means for illuminating the liquid crystal panel 57 with surface light emission, is incorporated behind the liquid crystal panel 57.

The liquid crystal panel 57 has a mask size 60 representing the size of the mask (for example, 6 cm × 8 cm) attached to the aperture 51 of the film holder 4, and the type (120 type or 220 type) of the loaded photographic film 49. ), The type of data (frame number, aperture value, shutter speed, date, time) to be displayed on the photographic film 49 at the time of photographing, the type of data 62 to be displayed, and the ISO of the photographic film 49
A general-purpose display unit 63 for displaying data (sensitivity), date, time, total shot number of each unit, shutter speed and aperture value, abbreviation of photo film, frame number, etc.
A film counter 64 for displaying the number of shots, a camera monitor 65 for displaying the state of the camera 2, and an ISO data input type 66 for indicating an ISO data input method are displayed.

On the left side of the liquid crystal panel 57 on the operation panel 58, various settings such as manual input of an ISO value,
A setting dial 68 used for setting a date, a time, and the like is provided. On the right side of the liquid crystal panel 57, a total shot switch 69 for sequentially displaying the number of operations of the camera body 3, the number of operations of the lens unit 5, and the number of operations of the film holder 4; Backlight switch 70 for turning on light 58
Are provided.

Further, these total shot switches 6
9 and a backlight switch 70, a frame number switch 72 for displaying the frame number on the general-purpose display section 63, a date switch 73 for displaying the date and time on the general-purpose display section 63, and a photo film 49. 1
A film set switch 74 for setting a frame,
A display changeover switch 75 for switching the display of the general-purpose display section 63 is provided. These switches 72-
Reference numeral 75 is housed in a switch cover 76 that can be freely opened and closed in order to prevent the setting from being changed by being inadvertently pushed and rarely used during normal photographing.

The above-mentioned display changeover switch 75 is operated when switching the display between the ISO value used at the time of photographing as shown in FIG. 4 and other information as shown in FIG. In the present embodiment, among other information other than the ISO value, the aperture value and the shutter speed (AV / TV value)
Is normally displayed at all times. Therefore, even if the frame number switch 72 or the date switch 73 is pressed to display the frame number or the date and time, the display changeover switch 75 is displayed.
Pressing twice returns to the display of the AV / TV value. As described above, the standard display of the general-purpose display unit 63 is changed to the ISO value and the AV value.
The reason why the / TV value is used is that the frame number and date information are not necessary during a normal shooting operation, and the information necessary for shooting can be instantaneously switched with one switch 75, so that the camera 2 The operation becomes simple, and the photographing can be performed efficiently.

The camera monitor 65 includes a mark 78 representing the camera body 3, a mark 79 representing the film holder 4,
It comprises a mark 80 representing the lens unit 5 and a mark 81 representing the AE finder 6. The camera body 3, the lens unit 5, and the liquid crystal unit 6 are attached to the film holder 4, and the respective contact portions 19, 20, 29, 30,.
When the units are electrically connected by 54 and 55, the liquid crystal panel 57 has a mark 7 in a filled state.
8 to 81 are displayed. Further, when the respective photographing units are not connected or when a connection error occurs, as shown in FIG.
1a is displayed. As a result, the liquid crystal unit 57 is attached even though the unit is attached to the camera body 3.
When the mark is displayed as an outline, it can be understood that a contact failure has occurred in the contact portion.

Even when the film holder 4 is not attached to the camera body 3 and is a single unit, as shown in FIG. 6, information other than the imprint data type 62 is displayed on the liquid crystal panel 54. The camera monitor 65 displays outline marks 78a to 81a. Thereby, the state of the film holder 4 can be easily confirmed.

The camera 2 monitors whether or not a warning or error state has occurred in each unit when the power is turned on by the mode changeover switch 33, during a shooting sequence, and by a timer interrupt at regular time intervals. A monitoring program is activated. In this monitoring program, when an error or warning condition is found in any of the units, the corresponding mark on the camera monitor 65 is displayed by blinking to notify the user. This camera monitor 6
By means of 5, it is possible to easily and surely know the unit in the warning or error state, and to immediately resolve the cause of the warning or error and perform photographing.

Next, the operation of the above embodiment will be described. As shown in FIG. 6, the liquid crystal panel 57 of the film holder 4 which is not connected to the camera body 3 but is a single unit displays information other than the imprint data type 62. Further, the camera monitor 65 displays the outline marks 78a to 81a.
"a" is displayed to indicate that each photographing unit is not connected. Thereby, the state of the film holder 4 can be easily confirmed.

A film holder 4, in which a photographic film 49 is loaded, is attached to the camera body 3, a lens unit 5, and an AE finder 6 are mounted. When the power of the camera 2 is turned on by operating the mode changeover switch 33, the control circuit of the film holder 4 Identifies whether or not the camera body 3 is connected via the contact portions 54 and 55 as shown in the flowchart of FIG. If the connection of the camera body 3 cannot be identified, the control circuit of the film holder 4 ends the processing without changing the display on the liquid crystal panel 57 as shown in FIG.

If the control circuit of the film holder 4 confirms the connection of the camera body 3, a mark 79 indicating the film holder 4 in a solid state and a mark 78 indicating the camera body 3 are displayed on the liquid crystal panel 57. Is done. afterwards,
Confirmation of the connection of the lens unit 5 and confirmation of the connection of the AE finder 6 are sequentially performed. When the connection is confirmed, marks 80 and 81 in a filled state are sequentially displayed.

When the identification of the photographing unit connected to the camera body 3 and the display on the camera monitor 65 are completed,
The control circuit of the film holder 4 turns off the battery mark 83 displayed on the liquid crystal panel 57. Further, the control circuit of the film holder 4 uses the IS stored in the EEPROM.
The O data is transmitted to the camera body 3, and the ISO data or the AV / TV value is displayed on the general-purpose display section 63 of the liquid crystal panel 57. Further, the control circuit sets “1” to the built-in connection flag memory.

As described above, the photographing unit connected when the power of the camera body 3 is turned on is detected, and the liquid crystal panel 57 is detected.
By displaying a mark indicating the imaging unit connected to the camera, it is possible to easily know a connection error of the imaging unit. The detection of the connected photographing unit is performed not only when the power is turned on but also when the photographing unit is connected to the camera body 3 while the power is on. 57 is displayed.

As shown in the flowchart of FIG. 8, when the connected photographing unit is removed while the power is turned on, the detection of the connected photographing unit is performed, and the mark of the removed photographing unit is detected. Is the LCD panel 5
7 is turned off. When the power of the camera 2 is turned off, FIG.
The battery is checked as shown in the flowchart of FIG. Thereafter, each mark on the camera monitor 65 is turned off, and a battery mark 83 corresponding to the capacity of the battery is displayed on the liquid crystal panel 57 as shown in FIG.

As described above, the connected photographing unit can be confirmed by the camera monitor of the liquid crystal panel 57. If the mark on the camera monitor 65 of the liquid crystal unit 57 is displayed with a contour line even though the photographing unit is attached to the camera body 3, contact failure of the contact portion has occurred. As a result, it is possible to immediately return to a state in which shooting is possible.

When taking a picture with the camera 2,
For example, when the ISO data is displayed on the general-purpose display section 63 of the liquid crystal panel 57, the frame number switch 7
2 or the date switch 73 is pressed, the general-purpose display 63 displays the frame number or the date and time. When the display changeover switch 75 is pressed in this state, the control circuit of the film holder 4 identifies the input mode of the ISO value as shown in the flowchart of FIG.
As shown in FIG. 4, the ISO value is displayed on the general-purpose display section 63.

Further, the display changeover switch is again set to 7
When 5 is pressed, the control circuit acquires the AV / TV value from the camera body 3 and displays the abbreviation of the photographic film 49 loaded on the general-purpose display section 63. And as shown in FIG.
An aperture value and a shutter speed are displayed on a general-purpose display section 63.
As described above, since the standard display of the general-purpose display unit 63 is set to the ISO value and the AV / TV value, information necessary for photographing can be instantaneously switched and obtained with one switch 75. The operation 2 is simplified, and the photographing can be performed efficiently.

In the above-described embodiment, the OK / NG of the connection of the photographing unit is notified to the user by the solid display and the outline display of the mark on the camera monitor.
This may be reversed, or solid display and non-display, outline display and non-display may be used. In addition, although the description has been given of a lens shutter type single-lens reflex camera as an example, the present invention can also be used for a single-lens reflex camera in which a shutter is incorporated in a camera body.

[0042]

As described above, according to the camera of the present invention, it is possible to easily know the connected photographing unit, so that the photographing unit can be properly and promptly restored from a connection error. be able to.

Also, when the information on the liquid crystal panel is switched to the display of information other than the ISO information, the aperture value and the shutter speed are always displayed, so that it is possible to easily compete for information necessary for photographing. become able to.

[Brief description of the drawings]

FIG. 1 is a plan view of a film holder.

FIG. 2 is a perspective view showing the appearance of the camera.

FIG. 3 is a side view and a sectional view of a main part of the camera.

FIG. 4 is an explanatory diagram showing a state of a liquid crystal panel when displaying an ISO value.

FIG. 5 is an explanatory diagram showing a state of the liquid crystal panel when displaying an AV / TV value.

FIG. 6 is an explanatory diagram showing a state of the liquid crystal panel when the power is off.

FIG. 7 is a flowchart of a process for identifying an imaging unit connection.

FIG. 8 is a flowchart of a photographing unit removal process.

FIG. 9 is a flowchart of a process when the power is turned off.

FIG. 10 is a flowchart of a display switching process between an ISO value and an AV / TV value.

[Explanation of symbols]

 2 Camera 3 Camera body 4 Film holder 5 Lens unit 6 AE finder 57 LCD panel 24 Mirror mechanism 75 Display switch

Continued on the front page (72) Inventor Tokuji Sato 3-13-45 Izumi, Asaka-shi, Saitama Fuji Photo Film Co., Ltd.

Claims (3)

[Claims] 1. A camera comprising a camera main body and various photographing units detachable from the camera main body, wherein each photographing unit name or each photographing unit is provided on a liquid crystal panel provided in any of the photographing units. And displaying the marks indicating the connection and disconnection between the camera body and each photographing unit by changing the display state of these marks. 2. The camera according to claim 1, wherein the mark is displayed on a liquid crystal panel provided on a film holder into which a photographic film is loaded. 3. A camera comprising a liquid crystal panel for switching and displaying ISO information of a loaded photo film and various information other than the ISO information, wherein the information on the liquid crystal panel is a display of information other than the ISO information. A camera that always displays an aperture value and a shutter speed when the camera is switched to.