JPH11119318A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of storing/displaying the total number of operation times in every unit. SOLUTION: The number of the operation times of a shutter device 17, a mirror mechanism 24 and a winding mechanism 53 are stored in a lens unit 5, a camera body 3 and a film holder 4 which are provided with the shutter device 17, the mirror mechanism 24 and the winding mechanism 53, as mechanical operation mechanisms respectively. EEPROMs 18, 78 and 87 are provided and when the total shot button 55 of a control panel 58 provided in the film holder 4 is operated, the total number of the operation times of the respective units are successively displayed on a liquid crystal panel 54 at every constant interval of time.

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 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.

Some lens shutter type single-lens reflex cameras use a film holder that counts the operation of a film winding mechanism of the film holder and displays the total number of operations. According to this,
It can be used as a measure of camera overhaul time.

[0004]

However, in the above-mentioned camera, since each unit is exchanged and used, the number of operations of the camera body and the lens unit cannot be derived from the total number of operations of the film holder. It cannot be used as a measure of overhaul of the lens unit.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a camera capable of storing the total number of shots for each unit.

[0006]

In order to solve the above problems, a camera according to the present invention is provided with a storage element for counting and storing the number of operations of each unit, and displays the total number of operations of each unit. Operation is performed,
A mark representing each unit or each unit is sequentially displayed on the liquid crystal panel at regular intervals, and the total number of operations of each unit is read from the storage element in accordance with these displays, and is sequentially displayed on the liquid crystal panel. Things.

[0007]

FIG. 2 shows the appearance of a lens shutter type single-lens reflex camera of the present invention. Camera 2
Includes a camera body 3, a film holder 4 attached to the rear 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 main body 8 in which a mirror mechanism, a control circuit and the like are incorporated, and a focus adjusting mechanism 9 provided below the main body 8.
As shown in FIG. 3 which is a side view and a cross-sectional view of a main part of the camera 2, openings 1 are provided on the front side and the rear side of
A bellows 13 is provided between the opening 10 on the front side and the lens board 12 constituting the focus adjustment mechanism 9 to block the photographing optical path.
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.

A 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 that also serves as a diaphragm incorporated therein, and an EEPROM 1 for a shutter that stores the number of times the shutter device 17 is operated.
8 (see FIG. 1). Since the shutter device 17 is open at the time of non-photographing, the subject light passing through the photographing lens 16 transmits the lens board 12, the bellows 13, and the opening 1
0 and enters the main body 8.

On the back side of the lens unit 5 and on the front side of the lens board 12, a shutter device 17 and an EEPROM 18 of the lens unit 5 and a control circuit built in the camera body 3 are electrically connected. Contact portions 19 and 20 are provided. The lens board 12 and the camera body 3 are electrically connected by a flexible cord 21.

In the main body 8, an opening 11 on the back of the main body 8 is provided.
A mirror mechanism 2 including a light-shielding plate 22 that closes the opening 11 in a light-tight manner and a mirror 23 that changes the optical path of subject light.
4 are arranged. 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 moved to open 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.

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 imaged 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,
Angle finder that converts the image formed on the camera into an eye level, and an AE with an automatic exposure function as shown in the figure.
The viewfinder 6 and the like are mounted according to the photographing conditions and applications.

The AE finder 6 is a finder optical system equivalent to an angle finder that bends the subject light imaged on the focus glass 26 so as to be viewed as an erect image. The AE finder 6 is formed on the focus glass 26. A light receiving element 27 (see FIG. 1) for measuring the brightness of the subject light, and a shutter speed based on the photometric value of the light receiving element 27 and the aperture value set by the lens unit 5 while driving the light receiving element 27. A which is determined and input to the control circuit of the camera body 3
It comprises an E-finder control circuit 28 (see FIG. 1) and the like.

In the finder optical system of the AE finder 6, a display meter for displaying an aperture value and a shutter speed is incorporated 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 body 3 are provided on a lower portion of the AE finder 6 and an upper surface of the camera body 3, respectively. I have.

On one side 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. On the upper surface of the main body 8, beside the focus glass 26, a liquid crystal panel 3 for displaying a state of the camera such as whether or not photographing is possible and a warning or error display such as a remaining battery level or abnormal exposure.
7 are provided. The liquid crystal panel 37 has a backlight 38 so that the display contents can be checked even in a dark place.
(See FIG. 1).

The focus adjustment 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. As a result, 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 an aperture 51 for defining an exposure range for the photographic film 49. Various sizes of masks are attached to the aperture 51, and the photographing size can be changed as appropriate. Aperture 5
A light-shielding lid 52 that shields the space between the opening 11 of the camera body 3 and the aperture 51 when the film holder 4 is removed from the camera body 3 is inserted in front of 1. The light-shielding lid 52 is removed from the film holder 4 at the time of photographing.

The film holder 4 is rotatable with respect to the camera body 3. By rotating the film holder 4 without changing the position of the camera 2, the vertical and horizontal directions of the photographing screen can be switched. . 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.
Further, a wind-up mechanism 53 for winding up the photographic film 49 after the photographing of all frames is completed is incorporated.
The control circuit in the camera body 3 and the film holder 4
Contact portions 71 and 72 are provided on the rear side of the camera body 3 and on the front side of the film holder 4, respectively, so as to be able to electrically connect the internal control circuits.

As shown in FIG. 4, a liquid crystal panel 54 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.
A total shot button 55 for displaying the total number of shots of each unit on the liquid crystal panel 54, and a backlight 56 for illuminating the liquid crystal panel 54 from behind (see FIG. 1).
And an operation panel 58 provided with a backlight button 57 and the like for activating the operation.

The liquid crystal panel 54 has a mask size 60 (for example, 6 cm × 8 cm) representing the size of the mask attached to the aperture 51 of the film holder 4, and the type (120 type or 220 type) of the loaded photographic film 49. ), A general-purpose display section 62 for displaying the sensitivity, date and time of the photographic film 49, the total number of shots for each unit, a number display 63 for displaying the number of shots, and a camera monitor for displaying the state of the camera 2. 64 is displayed. Switching of the display of the general-purpose display unit 62 is performed by a display changeover switch (not shown) provided on the operation panel 58 or a total shot button 55.

The camera monitor 64 has a mark 66 representing the camera body 3 and a mark 67 representing the film holder 4.
And a mark 68 representing the lens unit 5 and a mark 69 representing the AE finder 6. These marks 6
6 to 69, only the mark 67 is displayed on the liquid crystal panel 54 when the film holder 4 is not attached to the camera body 3 and is a single unit. 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, 3
When the units are electrically connected by 0, 71, 72, marks 66, 68, 69 are displayed on the liquid crystal panel 54. Accordingly, when no mark is displayed on the liquid crystal unit 54 even though the unit is attached to the camera body 3, it can be understood that a contact failure has occurred in the contact portion.

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 the shooting sequence, and by a periodic timer interrupt. The monitoring program runs. In this monitoring program, when a warning state is found in any of the units, the corresponding mark on the camera monitor 64 is displayed by blinking to notify the user. If an error is found in any of the units, the corresponding mark on the camera monitor 64 is displayed blinking. Note that when an error state is found, since normal shooting cannot be performed, each function of the camera 2 may be locked to disable shooting.

The camera monitor 64 makes it possible to easily and surely know which unit is in a warning or error state, so that the cause of the warning or error can be quickly resolved and the photographing can be performed. The blinking period of the mark differs between the time of warning and the time of error, and the blinking of the mark at the time of warning is performed at approximately half the speed of the blinking of the mark at the time of error.

When a warning or an error is found by the monitoring program that has been operated again in a unit in which no abnormality has been found by the monitoring program, the backlight 56 illuminating the liquid crystal panel 54 is synchronized with the mark. It flashes and emits light. According to this, it is possible to reliably notify the user that a warning or an error has occurred during shooting or in a dark place.

In the present embodiment, the error means the opening / closing of the shutter blades constituting the shutter device 17 and the light shielding plate 2.
2 shows a case in which operations basically required for photographing, such as up / down of the mirror 23, photometry by the light receiving element 27 in the AE mode, and film winding by the winding mechanism 54, are not performed, or these operations. The signal indicates that no signal has been input to the control circuit, and the warning indicates a minor abnormal condition other than the above-described error.

When the total shot button 55 provided on the operation panel 58 of the film holder 4 is pressed,
As shown in FIG. 5, the marks 68, 6 on the camera monitor 64
6, 67 perform blinking display in sequence for a certain period of time, and the display of the general-purpose display section 62 is switched in accordance with the blinking display of these marks, and the total number of operations of the shutter device incorporated in the lens unit 5, the camera body 3, the total number of operations of the mirror mechanism 24 and the total number of operations of the film winding mechanism 53 of the film holder 4 are sequentially displayed. Note that the minimum unit of the total number of operations of each unit is 100.

If a warning or an error occurs in any of the units of the camera 2 and the mark is displayed on the camera monitor 64 and the total shot button 55 is operated while the mark is blinking, the display may be confused. Therefore, when the total shot button 55 is operated, the blinking mark on the camera monitor 64 is temporarily stopped and lit until the display of the total number of operations is completed.

Further, the shutter device 17, the mirror mechanism 24, and the winding mechanism 53 of each unit are set in advance with use limit numbers. When the number of operations of each mechanism reaches the use limit number, a mark on the camera monitor 64 is displayed. The number of operations is displayed on the general-purpose display unit 62 in a blinking manner, and the user is informed that overhaul should be performed. The comparison between the total number of operations of each mechanism and the usage limit is performed when the power of the camera 2 is turned on or at the time of initial processing when a unit is replaced.

FIG. 1 is a block diagram showing a circuit configuration of each unit of the camera 2. In the camera body 3, a liquid crystal panel 37, a backlight 38, and a mirror mechanism 2 are provided.
4. In addition to the operation panel 36, a mirror driving circuit 76 including a motor 75 for driving the mirror mechanism 24, the mirror mechanism 24
, A mirror position detection circuit 77 for detecting the positions of the light shielding plate 22 and the mirror 23 and the operation of the light shielding plate 22 and the mirror 23, and a mirror mechanism 24.
An EEPROM 78 for storing the number of times of operation of the shutter device, a shutter drive circuit 79 for controlling and driving the shutter device 17 incorporated in the lens unit 5, a position and operation of the shutter blades of the shutter device 17 to detect a shutter position detection circuit 80, An exposure monitor circuit 81 is provided for measuring the subject light exposed on the photographic film 49 and detecting whether the exposure is over or under.

The camera body 3 incorporates a body MPU 82 and the like, which are control circuits for controlling the above circuits and the circuits provided in the lens unit 5 and the AE finder 6.

The film holder 4 includes a liquid crystal panel 54, a backlight 56, an operation panel 58, a winding mechanism 53, a winding driving circuit 85 including a motor 84 for driving the winding mechanism 53, and a winding mechanism 53. A hoist detection circuit 86 for detecting the rotation of a gear or the like, a holder EEPROM 87 for storing the number of times the hoist mechanism 53 is operated,
Holder MPU8 which is a control circuit for controlling these circuits
8 are incorporated.

In the holder MPU 88, a display counter 90 used to display the total number of operations on the liquid crystal panel 54 and a warning flag are set when the total number of operations of each unit reaches the use limit. A flag memory 91 is provided.

Next, the operation of the above embodiment will be described with reference to FIG.
And a flowchart of FIG. When a film holder 4, in which a photo film 49 is loaded, a lens unit 5, and an AE finder 6, are mounted on the camera body 3, and the mode switch 33 is operated to turn on the power of the camera 2, the body incorporated in the camera body 3 is turned on. The MPU 82 has contact points 19, 20, 29, 30, 71,
The unit connected to the camera body 3 via the unit 72 is detected. The body MPU 82 converts the data of the detected unit into a holder MP incorporated in the film holder 4.
Input to U88.

The holder MPU 88 displays marks 66 to 69 on the camera monitor 64 of the liquid crystal panel 54 based on the input connection unit data. If no mark is displayed on the liquid crystal panel 54 despite being attached to the camera body 3, this indicates a state in which a contact failure has occurred in the contact portion of the camera body 3 or the contact portion of each unit. The user can easily and reliably identify a unit having a poor contact.

A monitoring program for detecting a warning state and an error state of each unit operates when the power of the camera 2 is turned on, during a photographing sequence, and by a periodic timer interrupt. The body MPU 82 detects the open / closed state of the shutter device 17 by the shutter position detection circuit 80 and detects an abnormal exposure with respect to the set value by the exposure monitor circuit 81, thereby warning and error states of the shutter device 17 and the shutter drive circuit 79. To detect. The body MPU 82 includes a mirror position detection circuit 7
7, the open / close state of the mirror mechanism 24 is detected, and the warning and error states of the mirror mechanism 24 and the mirror drive circuit 76 are detected. Further, the body MPU 82 includes the light receiving element 27
The AE finder control circuit 28 confirms whether or not the photometry on the focus glass 26 is properly performed, and detects a warning and an error state of the AE finder 6.

The holder MPU 88 includes a winding detection circuit 86
Thus, the setting of the first frame of the photographic film 49, the winding of one frame after shooting, and the winding of the film after shooting are detected, and the warning and error states of the winding mechanism 53 and the winding drive circuit 85 are detected.

Body MPU 82 and Holder MPU 88
Are the opening and closing of the shutter blades constituting the shutter device 17,
Up / down of the light shielding plate 22 and the mirror 23, photometry by the light receiving element 27 in the AE mode, and a winding mechanism
If an operation that is basically necessary for photographing, such as film winding, is not performed, or if a signal indicating the operation is not input, it is determined that an error has occurred. An abnormal state is determined as a warning state.

When the power of the camera is turned on, the total number of operations of each unit is checked in accordance with the flowchart shown in FIG. First, register initialization is performed in the body MPU 82, and then the body MP
The number of operations of the shutter device 17, the mirror mechanism 24, and the winding mechanism 53 stored in each of the EEPROMs 18, 78, and 87 is read by U82. In conjunction with the reading of each operation count, all the patterns on the liquid crystal panel 54 are displayed to notify the user that the operation count of each unit is currently being checked.

The number of operations of the shutter device 17, the mirror mechanism 24, and the winding mechanism 53 read from the EEPROMs 18, 78, and 87 is compared in the body MPU 82 with the use limit number of each mechanism. If the total number of operations for each Yuni is equal to or less than the usage limit, the body MPU 82 starts preparation for photographing by the camera.

If the total number of operations of any of the units is equal to or exceeds the usage limit, a warning flag is set in a flag memory 91 provided in the holder MPU 82. When a warning flag is set in the flag memory 91, the holder MPU 88 causes the corresponding mark on the camera monitor 64 of the liquid crystal panel 54 to blink, and displays the number of operations on the general-purpose display unit 62, so that the user needs overhaul. Let them know

If no warning or error is detected by the monitoring program, the liquid crystal panel 38 provided on the upper surface of the camera body 3 indicates that the preparation for photographing is completed. When the AE finder 6 is used, an operation panel 36 provided on the side of the camera body 3 is used.
The shutter speed adjustment dial 32 is operated to set the AE mode.

The framing is performed by looking into the AE finder 6, the shutter speed and the aperture value displayed inside are confirmed, and the release switch 35 is operated. When the release switch 35 is operated, the operation signal is input to the body MPU 82, and the light of the subject formed on the focus glass 26 by the light receiving element 27 of the AE finder 6 is measured. The AE finder control circuit 28 determines the shutter speed based on the set aperture value and inputs the shutter speed to the body MPU 82.

The body MPU 82 controls the shutter drive circuit 79 based on this signal, and closes the shutter blades of the shutter device 17 of the lens unit 5. Further, the body MPU 82 controls the mirror driving circuit 76 to drive the mirror mechanism 24, rotate the light shielding plate 22 and the mirror 23 to the open position, and open the opening 11 on the back side of the main body 8.

Next, the shutter blades of the shutter device 17 are opened and closed according to the aperture value set by the lens unit 5 and the shutter speed determined by the AE finder 6. The subject light transmitted through the photographing lens 16 passes through the shutter device 17, the lens board 12, the bellows 13, and the main body 8, enters the film holder 4, and exposes the photographic film 49 set on the aperture 51 of the film holder 4. I do. As soon as the shutter device 17 is closed, the mirror mechanism 24 rotates to the closed position to shield the opening 11 from light, and the shutter device 17 is opened.

In the film holder 4, the holder MPU 88
Controls the winding drive circuit 85 to drive the winding mechanism 53 to wind up the photographic film 49 by one frame and update the display of the number display 63 on the liquid crystal panel 54.

The body MPU 82 activates the monitoring program also during this photographing sequence, and confirms via the AE finder control circuit 28 whether or not the photometry on the focusing glass 26 is properly performed by the light receiving element 27. AE
The warning and error states of the finder 6 are detected.

The body MPU 82 detects the open / closed state of the shutter device 17 by the shutter position detection circuit 80 and detects an abnormal exposure with respect to the set value by the exposure monitor circuit 81, so that the shutter device 17 and the shutter drive circuit 79 Detect warning and error conditions. Further, the open / close state of the mirror mechanism 24 is detected by the mirror position detection circuit 77, and the warning and error states of the mirror mechanism 24 and the mirror drive circuit 76 are detected.

The holder MPU 88 includes a winding detection circuit 86
To detect the winding of one frame after shooting, and the winding mechanism 5
3 and the warning and error states of the winding drive circuit 85 are detected.

Further, the body MPU 82 and the holder MPU
Reference numeral 88 denotes the number of operations of the shutter device 17, the mirror mechanism 24, and the winding mechanism 53, and the EEP incorporated in the lens unit 5, the camera body 3, and the film holder 4.
It is stored in the ROM 18, 78, 87.

When the total shot button 55 is operated during the photographing operation as described above, FIG.
Is displayed according to the flowchart shown in FIG. When the total shot button 55 is operated, the holder MPU 88 turns on the blinking mark on the liquid crystal panel 54 in accordance with the input signal, so that the total shot display and the error display are not confused.

The holder MPU 88 resets the display counter 90, reads the total number of operations of the shutter device 17 from the EEPROM 18 incorporated in the lens unit 5, and makes the mark 68 on the camera monitor 64 blink on the liquid crystal panel 54. Meanwhile, the total number of operations is displayed on the general-purpose display section 62. Immediately after that, the timer for controlling the display time of the number of operations starts.

When the timer expires, the process returns to the start. Since the holder MPU 88 is displaying the total shot, the display count 90 is counted. At this point, the count value of the display counter 90 is 1
Therefore, the holder MPU 88 is the EE of the camera body 3
The total number of times of operation of the mirror mechanism 24 is read from the PROM 38, and the total number of times of operation of the mirror mechanism 24 is displayed on the general-purpose display unit 62 while the mark 66 of the camera monitor 64 is blinkingly displayed on the liquid crystal panel 54.

When the display of the total number of operations of the mirror mechanism 24 is started, the timer is started again. If the timer expires after a certain time, the holder MPU
88 counts the display counter 90 again. Since the counter value of the display counter 90 at this time is 2,
The holder MPU 88 refers to the contents stored in the EEPROM 87 incorporated in the film holder 4 and
While blinking the mark 67 on the camera monitor 64 of the liquid crystal panel 54, the total operation number of the winding mechanism 53 is displayed on the general-purpose display unit 62.

When the display of the total number of operations of the winding mechanism 53 is started, the timer starts again. If the timer expires after a certain time, the holder MPU
88 counts the display counter 90 again. Since the counter value of the display counter 90 at this time is 3,
The display processing of the total shot number ends.

First, the total shot button 55
If the button is continuously pressed from the state in which the button is pressed, the timer is restarted many times, so that the total number of operations of the shutter device 17 is continuously displayed on the liquid crystal panel 54. When the total shot button 55 is pressed while the total number of operations of any unit is displayed, the total number of operations of the next unit is displayed on the liquid crystal panel 54 each time the total shot button 55 is pressed. . According to this, the number of operations of each unit can be quickly confirmed without waiting for the end of the timer.

In the above embodiment, the mark of the camera monitor is displayed on the liquid crystal panel in advance, and the corresponding mark blinks when the total number of operations is displayed. However, the mark is displayed normally. Instead, the corresponding marks may be sequentially displayed only when the total number of operations is displayed. Further, the unit name may be directly displayed on the liquid crystal panel without using the mark indicating the unit.

Furthermore, when the total number of operations reaches the use limit, a warning is displayed on the liquid crystal panel. However, each mechanism of the camera may be locked so that photographing cannot be performed.

Although the warning and the error are displayed on the liquid crystal panel of the film holder, they may be displayed on the liquid crystal panel of the camera body or displayed in the viewfinder.

Further, although the description has been made of a single-lens reflex camera with a lens shutter as an example, the present invention can also be applied to a single-lens reflex camera in which a shutter is incorporated in a camera body. In addition to the above system cameras, the present invention can be used for a compact camera or the like in which each mechanism is unitized inside.

[0062]

As described above, according to the camera of the present invention, it is possible to know the total number of operations of each of a plurality of units. And the reliability of the camera can be further improved.

Further, since a warning display and a camera operation prohibition are performed by comparing the preset use limit number of each unit with the stored total operation number, the stored total operation number is reduced. The reliability of the camera can be further improved without waste.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an electrical configuration of a camera.

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 display contents of a liquid crystal panel of a film holder when a film sensitivity is displayed.

FIG. 5 is an explanatory diagram showing display contents of a liquid crystal panel of a film holder when a total number of operations is displayed.

FIG. 6 is a flowchart of a comparison process between the total number of operations and the use limit number.

FIG. 7 is a flowchart of a total operation count display process.

[Explanation of symbols]

 2 Camera 3 Camera Body 4 Film Holder 5 Lens Unit 6 AE Finder 17 Shutter Device 18, 78, 87 EEPROM 24 Mirror Mechanism 49 Photo Film 53 Film Winding Mechanism 54 Liquid Crystal Panel 56 Backlight 82 Body MPU 88 Holder MPU

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kotobuki Hamada 3-13-45 Izumi, Asaka-shi, Saitama Fuji Photo Film Co., Ltd. (72) Inventor Tokuji Sato 3-13-45 Izumi, Asaka-shi, Saitama Fuji Photo Inside Film Co., Ltd.

Claims (8)

[Claims] 1. A camera having a plurality of photographing mechanisms unitized and having a liquid crystal panel for displaying various photographing information, wherein a storage element is provided for counting and storing the number of operations of each unit, and a total number of each unit is provided. When an operation for displaying the number of operations is performed, a mark indicating each unit name or each unit is sequentially displayed on the liquid crystal panel at regular intervals, and each unit is displayed from the storage element in accordance with the display. A camera which reads the total number of operations and sequentially displays them on a liquid crystal panel. 2. A camera provided with a liquid crystal panel for displaying various kinds of photographing information, wherein a plurality of photographing mechanisms are unitized, and a storage element for counting and storing the number of operations of each unit is provided. Each time an operation for displaying the number of operations is performed, the unit name or a mark representing each unit is sequentially displayed on the liquid crystal panel, and the total number of operations of each unit is displayed from the storage element in accordance with the display. A camera that reads out and sequentially displays them on a liquid crystal panel. 3. A camera comprising a camera body, a photographing lens with a built-in shutter detachable from the camera body, and a detachable photographing unit such as a film holder into which a film is loaded. A memory element for counting and storing the number of times is provided, and a mark representing each unit is displayed on a liquid crystal panel provided in any of the units, and an operation for displaying the total number of operations of each unit is performed. In this case, the marks are sequentially blinked and displayed at regular intervals, the total number of operations of each unit is read from each storage element in accordance with the blinking of these marks, and sequentially displayed on the liquid crystal panel. Camera. 4. A camera comprising a camera body, a photographing lens with a built-in shutter detachable from the camera body, and a detachable photographing unit such as a film holder into which a film is loaded. A memory element for counting and storing the number of times is provided, and a mark representing each unit is displayed on a liquid crystal panel provided in any of the units, and an operation for displaying the total number of operations of each unit is performed. A camera which sequentially blinks each of the marks each time the mark is read, reads out the total number of operations of each unit from each storage element in accordance with the blinking display of these marks, and sequentially displays them on a liquid crystal panel. 5. The flashing display of the mark is used for other information display, and when an operation of displaying the total number of operations is performed while each mark is flashing and displayed by the other information display. 5. The camera according to claim 3, wherein, after the blinking of the mark is stopped, the mark is blinked sequentially in accordance with the display of the total number of operations. 6. A camera in which a plurality of photographing mechanisms are unitized and provided with a liquid crystal panel for displaying various photographing information, wherein a storage element for counting and storing the number of operations of each unit is provided, and the operation of each unit is provided. A limit of the number of operations is set in advance, and when the number of operations stored in the storage element reaches the limit, a unit name or a mark indicating the unit on which the number of operations has reached the limit is displayed on the liquid crystal panel. And the number of operations. 7. A camera comprising a camera body, a photographic lens with a built-in shutter detachable from the camera body, and a detachable photographing unit such as a film holder into which a film is loaded. In addition to providing storage elements for counting and storing the number of times, a limit number of the number of times of operation of each unit is set in advance, and a mark representing each unit is displayed on a liquid crystal panel provided in any of the units. A camera characterized in that, when any of the number of operations stored in each storage element reaches a limit number, a mark of a corresponding unit and the number of operations are blinked on a liquid crystal panel. 8. The camera according to claim 6, wherein the operation of the camera is prohibited when the number of operations of any one of the units reaches the limit number.