JPH09197533A - Display device, film feeding device and camera provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely display a film rewinding mode without causing cost rising nor making a camera large in size by displaying the set film rewinding mode by using a winding mode display element. SOLUTION: In the display device provided with mode display elements 120 to 124 for displaying a film winding mode set in the camera; the set film rewinding mode is displayed by using the display elements 120 to 124. Namely, the display element (liquid crystal display segment, etc.) having the shape of a character suitable for the display of the winding mode is utilized for the display of the film rewinding mode, so that the need for newly providing the display element only used for the rewinding mode is eliminated and the set rewinding mode is confirmed at a glance without causing the cost rising nor making the camera large in size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film rewinding device for a camera.

[0002]

2. Description of the Related Art In a motor drive type camera in which film winding of a camera is electrically driven, it is known that the photographing mode can be switched between a single frame photographing (single photographing) mode and a continuous photographing (continuous photographing) mode. There is. Further, in the continuous shooting mode, the continuous shooting speed (frame speed) can be switched to 6 frames / second (high speed continuous shooting mode) or 3 frames / second (low speed continuous shooting mode).

Such switching of the frame speed is performed to determine how many times the shutter is released per second. Regarding the method of switching the frame speed, the power supply voltage of the motor is controlled to switch the motor driving speed itself. There is a waiting time before the start of the next frame shooting sequence at the break of each shooting sequence, and the frame speed is switched by switching the waiting time, or there are multiple transmission systems (gear ratios) in the motor drive transmission system. ) Is provided and the frame speed is switched by switching the gear ratio of the transmission system.

Further, most of the motor drive type cameras are equipped with an electric film rewinding mechanism, which is used when a film end detection signal for detecting the film end is generated. Alternatively, the film rewinding is automatically started when the forced rewinding switch is operated.

For the automatic winding and rewinding of these films, high speed is generally required, but on the other hand, there is also a demand for quiet operating noise. In particular, it is desirable that the operating noise in a place where silence is required, such as a concert hall or a wedding hall, is as low as possible so as not to disturb others.

Therefore, it suffices to be able to operate at high speed and quietly, but it is very difficult to satisfy both at the same time. Therefore, as proposed in Japanese Unexamined Patent Publication No. 1-279227, by making it possible to select either high speed or quiet according to the shooting situation, the operation sound that has been complained in the past is loud. It is possible to remedy a considerable number of unpopular cases.

[0007]

However, in the conventional camera, the film winding mode is displayed on the external display (liquid crystal display etc.) of the camera and the single-shot mode is "S".
(Single) ", continuous shooting mode is" C (Contin
It is often displayed as "uance)",
In most cases, when the film is rewound, only the back-counting display of the film counter is displayed, and there is no means for displaying the selected film rewind mode or speed.

Therefore, even if the camera user switches the film rewinding speed, the actual film rewinding sound can be seen after the rewinding is actually started, that is, the subtraction display speed of the film counter of the camera can be seen. There is a problem that it is not possible to confirm the rewinding mode of the film which is set only by listening to.

Here, it is possible to provide a display unit dedicated to the display of the film rewind mode in addition to the display unit for displaying the film winding mode on the external display, but the display area of the external display is not only increased. There is also the problem that the camera itself becomes large.

Further, it is conceivable to dispose a switching operation member which also serves as a film rewind mode display means outside the camera. However, considering the disposition space, not only the size of the camera is increased but also the operation is performed. There is a drawback that the cost is increased by adding the member.

Also, in most electric film rewinding devices, the motor, which is the drive source, is driven directly by the battery, which is the power source. The film rewind speed decreases and the set film rewind speed cannot be confirmed even if you watch the subtraction display speed of the film counter or hear the actual film rewind sound. .

As for the time required to rewind the film, the instruction manual for the camera says, "About 24 EX
However, this rewinding time is often in the optimum condition (equivalent to a new battery), and the photographer should be aware of the change in the time required to rewind the film as the power supply voltage drops. It is difficult to predict.

Therefore, a first object of the invention according to the present application is to provide a display device for a camera capable of reliably displaying the film rewind mode without increasing the cost or increasing the size of the camera.

The second object of the invention according to the present application is to:
It is an object of the present invention to provide a display device of a camera capable of predicting and displaying a rewinding time corresponding to a power supply voltage.

[0015]

In order to achieve the above object, in the first invention of the present application, a display device having a winding mode display element for displaying a film winding mode set in a camera is set. The film rewind mode is also displayed using the winding mode display element.

That is, by using a display element (a liquid crystal display segment or the like) having a shape such as a character suitable for the display in the winding mode also for the display in the film rewinding mode,
By eliminating the need to newly provide a display element dedicated to the rewind mode, the set rewind mode can be confirmed at a glance without increasing the cost or increasing the size of the camera.

Specifically, a winding mode display element such as "S" for displaying the one-frame shooting winding mode is used to display the silent rewinding mode, or the continuous shooting winding mode is displayed. The rewind mode for normal sound operation is displayed by using the winding mode display element such as “C”. In addition, a winding mode display element such as "CH" for displaying the winding mode for high-speed continuous shooting is used to display a rewinding mode for high-speed operation or a mode such as "CL" for displaying a winding mode for low-speed continuous shooting. The display element may be used to display the low-speed operation rewind mode.

In the second invention of the present application, the time predicting means for calculating the predicted time, which is the shortest time required for film rewinding, etc., based on the state of the rewinding drive power source before the start of film rewinding of the camera. Is provided so that the calculated estimated time is displayed.

That is, by displaying the estimated time in advance, the photographer can confirm when the rewinding ends before the rewinding starts. further,
By displaying the estimated time corresponding to the power supply state, this can be compared with the rewinding time corresponding to a new power supply so that the deterioration degree of the power supply can be confirmed.

The predicted time can be calculated based on the state of the power supply for rewinding drive, the time required to rewind a predetermined number of film frames, and the number of filmed frames.

Further, it is desirable to display the predicted time by using a time display element for displaying the shutter time of the camera so that it is not necessary to additionally provide a dedicated display element.

In the third invention of the present application, a predicted time (shortest time) required for film rewinding is calculated based on the state of the rewinding drive power source before the start of film rewinding of the camera, and the predicted time is calculated. The film feeding device is configured to selectively set the film rewinding execution time within a longer time range and control the film rewinding speed based on the set execution time.

That is, depending on the situation of the shooting site, the film can be rewound at the same time as the predicted time, that is, at high speed to enable quick film exchange, or at a time longer than the predicted time, that is, at a low speed. The film can be rewound and the film can be replaced as quietly as possible.

In the fourth invention of the present application, a camera which is easy to use is realized by mounting the above-mentioned display device or film feeding device on the camera.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings (FIGS. 1 to 14). 1 is a front view of the present invention, FIG. 2 is a top view, and FIG. 3 is a rear view of the camera. In each drawing, 1 is a camera body, 2 is a camera body 1, and A grip for the photographer to hold the camera, 3 is a mirror box provided with a movable main mirror for guiding the light flux transmitted through the photographing lens to the finder optical system, 4
Is a lens attachment / detachment button 5 provided on the camera body 1 for releasing the lock mechanism and attaching / detaching the taking lens.

Reference numeral 10 is an upper cover of the camera body 1, and 11 is a release button, which is constituted by a two-step switch. Of these two-stage switches, the first-stage switch is for performing photometry, distance measurement, and lens driving, and the second-stage switch is for various mechanical systems for the exposure operation of the camera and the next shooting. It is for charging and film feeding.

Reference numeral 12 is an electronic dial for inputting, changing, and setting information, which is used for inputting and setting information on the shutter speed value and aperture value, and for changing various modes for setting camera functions. Is. Reference numeral 13 is a drive setting button for switching the frame speed of a motor drive device that electrically drives film winding, and the film winding mode can be set by rotating the dial 12 while pressing the drive setting button 13.

In the camera of the present embodiment, the film winding mode is the high-speed continuous shooting mode "C _H ".
(6 frames / second), low-speed continuous shooting mode “ _CL ” (3 frames / second)
4 seconds, one frame shooting mode "S" and self-timer setting mode can be set. Reference numeral 14 denotes an AF setting button for changing / setting the auto focus (hereinafter referred to as AF) mode of the camera. When the dial 12 is rotated while the AF setting button 14 is being pressed, A
F mode can be set / changed.

Reference numeral 15 is an exposure mode setting button for changing / setting the exposure control mode of the camera. When the dial 12 is rotated while pressing the exposure mode setting button 15, the exposure control mode at the time of photographing by the camera is set / changed. it can.

In the camera of the embodiment, the program exposure "P", shutter speed priority exposure "T _V ", aperture value priority exposure "A _V ", manual exposure "M", etc. can be set as the exposure control mode. It has become.

By pressing the AF setting button 14 and the exposure mode setting button 15 at the same time, a rewinding mode setting standby state for switching the film rewinding drive speed of the motor drive device for electrically rewinding the film is set. By rotating the dial 12 in this state, the film rewinding drive speed can be switched and set.

Here, in the camera of this embodiment, three types of film rewinding modes can be set: a high speed rewinding mode " _CH ", a low speed rewinding mode " _CL ", and a silent rewinding mode "S". It is like this.

Reference numeral 100 denotes an external display unit of the camera, which displays as will be described later. Reference numerals 16 and 17 denote an AE lock button and an exposure correction button, which are provided on the upper right of the back surface of the upper cover 10, respectively. 18 is a power switch for switching the power of the camera ON / OFF,
Turning the lever of the power switch 18 counterclockwise turns it on, and turning it clockwise turns it off. Note that FIG. 3 shows a state in which the power switch 18 is turned on.

A film rewind button 19 is provided. Film rewinding usually reads the number of storable films loaded in the camera by the DX code displayed on the film cartridge, and automatically rewinds the film when the camera detects the end of the number of storable films. Is configured to do. However, in the camera of this embodiment,
In some cases, the photographer may want to forcibly rewind the film before the number of shots is completed, so that the film rewind button 19 is operated to rewind the film.

Reference numeral 20 is a back cover of the camera, and 21 is a lower cover of the camera. On the back of the lower cover 21, the power switch 1
8. A film rewind button 19 is provided. 22
Is an eyepiece for observing a photographic subject image transmitted through the photographic lens 5.

FIG. 4 shows the external display 1 of the camera of this embodiment.
00 is shown in detail. The external display device 100 is made of liquid crystal, and a filled character or a picture in the drawing represents a displayed segment, and a white character represents a non-displayed segment.

Reference numeral 101 is a segment for displaying the shutter speed, and 102 is a segment for displaying the aperture value. For example, FIG. 8 shows a state in which 1/8000 seconds · F1.4 is set.

Reference numerals 103, 104, 105, and 106 are segments for displaying the photographing mode. P (103) is a program mode, T _V (104) is a shutter speed priority mode, A _V (105) is an aperture priority mode, and M. (10
6) represents the manual mode. FIG. 8 shows a state in which the program mode “P” is set, and every time the dial 12 is rotated while pressing the exposure control setting button 15 from this state, the display of the photographing mode is P ← →.
T _V ← → A _V ← → M ← → P changes.

Reference numeral 107 denotes a segment for displaying a patrone mark, which lights up when a film patrone is loaded in the camera.

Reference numeral 108 is a dot for displaying a film state display and an exposure correction value, and is composed of a plurality of rectangular dots. When a normal film is loaded and the shooting standby state is set, all the dots 108 are turned on as shown in FIG. Further, during exposure compensation, the compensation values (-1, -2,-) of the exposure compensation amount display segment 109 are used.
The exposure correction amount is displayed by extinguishing the rectangular dots 108 corresponding to (3, +1, +2, +3, and circular dots). The exposure correction amount display 109 is an EV value display.

Reference numeral 110 is a frame for displaying the counter state of the film counter 111. When the normal film counter is displayed, the number of films is displayed on the film counter 111 and the frame 110 for displaying the counter state is also displayed.
Lights up.

Reference numeral 112 is a segment indicating that the auto bracket shooting mode for exposure (hereinafter referred to as AEB mode) is set. In the camera of this embodiment,
When the AEB mode setting button (not shown) is pressed, the AEB mode can be set. However, when the dial 12 is rotated here, the exposure amount becomes the proper exposure value according to the rotating direction every time the dial 12 rotates one click. 1/3 (E
V value) is changed in the direction of increasing or decreasing step by step. In this way, the set exposure amount is displayed by the correction value display of the exposure correction amount display segment 109 (-1, -2, -3, +1, +2,
This is displayed by turning off the rectangular dot 108 corresponding to +3 and a circular dot).

When the AEB mode is set, for example, when the exposure amount is set to three levels of EV-2, EV0, EV + 2, the rectangular dots of the exposure correction value display dots 108 corresponding to the respective set exposure amounts. Is turned off and the “AEB” character on the AEB mode display 112 is turned on.

Reference numeral 113 denotes a multiple exposure photographing mode (hereinafter, ME
This is a segment that indicates that the mode is set. In the camera of this embodiment, when the ME mode setting button (not shown) is pressed, the ME mode can be set, but when the dial 12 is rotated here, the dial 1 is turned on.
Each time 2 rotates one click, the number of multiple exposures is changed to increase or decrease according to the rotation direction. The multiple exposure number set in this way is displayed on the counter status display frame 11 in order to distinguish it from the normal film counter display.
It is displayed on the film counter 111 while 0 is turned off and the “ME” character of the ME mode display 113 is turned on.

Reference numerals 114, 115, and 116 are segments for displaying a focus state display of autofocus / manual focus in the autofocus camera, and 114 is a first autofocus mode "O".
The “ne Shot” mode, the reference numeral 115 indicates the second autofocus mode “Servo” mode, and the reference numeral 116 indicates the manual focus mode “M.Focus” mode by lighting.

Reference numeral 117 is a photometric display segment for displaying the photometric method of the camera. 120, 121, 122, 1
Reference numerals 23 and 124 denote film winding mode display segments, "S" 120 indicates a single-photographing (hereinafter referred to as single shot) mode, and "C" 121, "H" 122, and "L" 123 indicate that. Two types of continuous shooting (hereinafter referred to as continuous shooting) modes are displayed depending on the combination. Specifically, “C _H ” in the high-speed continuous shooting (hereinafter referred to as Hi continuous shooting) mode is displayed by a combination of “C” 121 and “H” 122, and low-speed continuous shooting (hereinafter referred to as LO continuous shooting) mode. “C _L ” indicates “C” 121 and “L” 12
Displayed in combination of 3.

Reference numeral 124 is a clock mark-shaped segment for displaying the self-timer mode.

FIG. 5 shows a control circuit of the camera of this embodiment. In the figure, reference numeral 201 denotes a microcomputer (hereinafter referred to as CPU), which is connected to a switch and a control unit described below by a plurality of input / output ports PX,
Each control unit is controlled according to a signal input from each input port PX.

SW1 is 1 of the release button 11 of the camera
It is a switch that is turned on by pushing down the step. When SW1 is turned on, the photometry control unit 212 of the camera starts photometry, and also starts distance measurement / calculation and lens driving.

SW2 is a switch which is turned on when the release button 11 is further depressed after the first step is depressed (second step), and starts the exposure operation sequence of the camera.

SWAE is a switch which is turned on when the exposure mode setting button 15 is pressed, and SWAF is an AF setting button 1
It is a switch that turns on when 4 is pressed. SWAF
And SWAE are simultaneously turned on, the film rewind setting mode is turned on. SWDR is a switch that turns on when the drive setting button 13 is pressed, and SWAEL is A
Switch that turns on when the E lock button 16 is pressed, SW
CP is a switch that is turned on when the exposure correction button 17 is pressed, SWRW is a switch that is turned on when the rewind button 19 is pressed, and SWMS is a switch that is turned on / off by rotating the main switch 18.

Switches SW1, SW2, SWAE, SW
Each of AF, SWDR, SWAEL, SWCP, SWRW, and SWMS has one end grounded and the other end CPU
The input ports P1 to P9 of 201 are connected. Since the input ports P1 to P9 are connected to the + voltage (V) via the resistor R respectively, the switches SW1 and SW
2, SWAE, SWAF, SWDR, SWAEL, SW
Each input port is pulled up to "H" when CP, SWRW, and SWMS are off, and "L" when it is on.
become.

Reference numeral 202 denotes an electronic dial counter,
In order to electrically detect the rotation of the electronic dial 12, the input ports I1 and I2 of the signals SWDL1 and SWDL2 generated with the rotation of the electronic dial 12 are provided.

FIG. 6 and FIG. 7 explain the structure of the electronic dial 12. In FIG. 6, 301 is a dial substrate, and a pattern 301a arranged in the circumferential direction is formed on the substrate 301. This dial board 3
01 is fixed to the electronic dial 12 and rotates integrally with the electronic dial 12.

Reference numeral 302 denotes a click plate which, like the dial board 301, rotates integrally with the electronic dial 12. The spring 30 is formed on the unevenness formed on the outer periphery of the click plate 302.
The ball 303 is biased by 4 and the click plate 3
When 02 rotates and the ball 303 gets over the outer peripheral convex portion of the click plate 302, an appropriate click feeling is given to the operation of the electronic dial 12.

306a is a SWDL1 signal contact piece, 306b
Is a SWDL2 signal contact piece, 307 is a GND contact piece, and these contact pieces are fixedly held by the dial contact piece body 305. By rotating the electronic dial 12, the dial substrate 30
When 1 rotates clockwise by one click, as shown in FIG. 7A, the electronic dial switch SWDL2 is turned on, then SWDL1 is turned on, and further SWDL2 is turned on.
Turns off and finally SWDL1 turns off.

The electronic dial counter 202 counts up or down by monitoring the state of the input port I1 when the input port 12 rises to "H". Therefore, in FIG. 7A, SWDL2 is OFF.
SWDL1 is ON when (input port I2 is "H")
(The input port I1 becomes "L"), and the electronic dial counter 202 counts down.

On the contrary, when the dial substrate 301 is rotated counterclockwise by one click, as shown in FIG.
WDL1 is turned on, SWDL2 is turned on, and SWD
L1 turns off, and finally SWDL2 turns off. Therefore, SWDL2 is OFF (when the input port I2 is "H", SWDL1 is OFF (the input port is I
1 “H”) state and the electronic dial counter 202 counts up. In this way, the electronic dial counter 202 stores the rotation information of the electronic dial 12 in the CPU.
Input to 201, and the CPU 201 is made to set / change the input information value.

Reference numeral 203 denotes a display control unit of the camera, which is a CP.
The external display unit 204 (100 in FIGS. 2 and 3) and the in-viewfinder display unit 205 are controlled and displayed by a signal from the output port P11 of U201.

Reference numeral 206 denotes a motor control unit, which is a CPU 2
01 output port P12 and controls a film feeding / rewinding motor (M _F ) 207 and a charge motor (M _C ) 208 according to a camera operation sequence signal.

Reference numeral 207 is a film feeding / rewinding motor (M _F ). Film feed amount detection device 209 to C
When a control signal is output from the output port P12 of the CPU 201 according to the signal input to the input port P13 of the PU 201, the drive control is performed by the motor control unit 206 that receives this control signal.

Reference numeral 208 is a charge motor (M _C ) for performing up / down drive of the mirror, charge drive of the shutter, and the like. Reference numeral 210 denotes a shutter control unit, which is the CPU 20.
1 is connected to the input / output port P14. The shutter control unit 210 controls the front curtain and the rear curtain, and further outputs a light emission signal for starting the flash emission when the traveling of the front curtain is completed.

Reference numeral 211 denotes an aperture control section for controlling the aperture in the taking lens 5, which is connected to the CPU 201 through the input / output port P15. The diaphragm control unit 211 is provided with the CPU 201.
In addition to narrowing down the aperture to a predetermined aperture in accordance with the signal, the aperture is opened after the shutter travels (after the exposure is completed), and an operation end signal is output to the CPU 201.

Reference numeral 212 denotes a photometric control unit including the photometric means of the camera, which is connected to the CPU 201 through an input / output port P16. The photometric control unit 212 measures the subject light that has passed through the taking lens 5 in response to a signal from the CPU 201,
The result is output to the CPU 201.

Reference numeral 213 is an autofocus CPU (hereinafter referred to as AF CPU), which is connected to the CPU 201 through an input / output port P17. AF CPU 213
Is based on an instruction from the CPU 201,
Exchanges subject information with and determines the in-focus state of the photographic subject based on lens drive information from the lens drive device,
Output to the input / output port P17 of the CPU 201.

Reference numeral 215 is a battery check circuit (hereinafter referred to as BC circuit) for monitoring the power supply voltage of the camera.

Next, the display operation of the external display device 100 of the camera will be described with reference to FIGS. FIG. 8 shows a display when the camera is in a shooting ready state (standby state). In this state, when the photographer presses the drive setting button 13 to switch the film winding mode (shooting frame speed / single shooting / continuous shooting), the CPU 20
1 detects that SWDR is turned on and prohibits interruption of switch signals other than the signal from the electronic dial counter 202. As a result, the film winding mode is set, and the CPU 201 outputs a control signal to the display control unit 203 to control the external display device 204 (100).

When the external display unit 204 (100) is in the film winding mode setting state, the display contents are displayed as shown in FIG. 9, the cartridge mark 107, the rectangular dot group 108 for displaying the film state, the counter state displaying frame 110 and the film. Winding mode display segments 120, 12
1, 122, 123, 124 (in FIG. 9, “C _H ” 12
1, 122 and the display state) are turned on,
Turn off other displays.

When the electronic dial 12 is rotated in this state, the film winding mode display 120, 121,
122, 123, and 124 is a single-shot "S" ← → Hi continuous shooting "C _H" ← → L _O continuous shooting "C _L" ← → Self-timer ← →
You can change or set the film winding mode by switching in the order of single shot "S". In this way, the desired film winding mode is set, the release button 11 is half-pressed, and the first-stage switch (SW1) is turned on to release the film winding mode setting state, and the external display 100 is switched to the standby display. Replace

In the standby state, the photographer presses the release button 11 for photographing and SW1 and SW2 are turned off.
When the answer is NO, the CPU 201 starts the shooting sequence, performs photometry, distance measurement, and driving of the shooting lens, and
Based on the signal from the photometry control unit 212, the aperture control unit 211 / shutter control unit 210 controls the aperture value / shutter time and starts the exposure operation.

[0071] After completion of exposure, CPU 201 returns the film feeding-winding via the motor control unit 206 motor (M _F)
Control drive of 207 and charge motor (M _c ) 208 is started. The film feeding and rewinding motor (M _F) 20
7 is a CPU 2 based on the film feed amount detection device 209.
The film winding operation is performed according to the signal from 01. The charge motor (M _C ) performs up / down drive of the mirror, charge operation of the shutter, and the like. During the film winding drive, the display control unit 203 causes the external display device 100 to operate as shown in FIG.
In the above, a part of the rectangular dots 108 for displaying the film state are turned off at a plurality of positions at regular intervals, and the turned off rectangular dots 108 are sequentially moved from left to right based on the signal from the film feed amount detection device 209, and then turned on. It is displayed so that the dots 108 flow from left to right (as if the film were moving). Then, when the film winding is completed, the rectangular dots 108 are set to the standby state (all lighting), and the number of films on the film counter 111 is counted up.

11 to 14 are explanatory views of the film rewinding mode display at the time of film rewinding in the camera of this embodiment. When the AF setting button 14 and the exposure mode setting button 15 are pressed at the same time during standby (FIG. 8), the CPU 201 detects that both SWAE and SWAE are turned on, and enters the rewind setting standby state.

At this time, as shown in FIG. 11, the external display device 100 includes the counter state display frame 110 and the film winding mode display segments 120, 121, and 1.
22, 123, 124 (in FIG. 11, “C _H ” 121,
(Displaying 122) is turned on, and the Patrone mark 10
7. Set the rectangular dot group 108 for film status display and the segment of the film counter 111 to blinking state,
Turn off other segments.

In the rewind mode setting standby state, the film winding mode display "S" indicates the silent mode,
" _CH " is a high-speed rewind mode, and " _CL " is a low-speed rewind mode. Therefore, it is not necessary to provide a segment dedicated to the display in the rewind mode in the external display device 100, and it is possible to suppress the cost increase and the size increase of the external display device 100 and eventually the camera.

When the electronic dial 12 is rotated in this state, the display is silent mode “S” ← → high-speed rewind mode “C _H ” ← →, similar to the film winding mode setting.
Low-speed rewind mode " _CL " ← → Silent "S" is switched in this order, and the film rewind mode can be changed / set. However, the self-timer mode cannot be selected.

When the film rewind mode is set, the segments of the cartridge mark 107, the rectangular dot group 108 and the film counter 111 are made to blink in order to distinguish from the display when the film winding mode is set.

When the desired film rewind mode is set, the release button 11 is half-depressed and the first-stage switch (SW1) is turned on to release the film rewind mode setting standby state, and the external display 100 Switches to the display during standby. After shooting a specified number of films, or when the photographer completes shooting and presses the film rewind button 17 to forcibly rewind the film, the camera
Start rewinding the film that has already been shot.

12 to 14 show the external display device 100 when the camera rewinds the film already taken. When the camera starts rewinding the film that has been shot, the external display device 100 displays the counter status display frame 110.
And a film winding mode display segment 120,
121, 122, 123, 124 (“S” in FIG. 12)
120), the cartridge mark 107, the rectangular dot group 10
8 and the film counter 111 other than the segments are turned off.

The rectangular dot group 108 (rewinding) of the film is rewound by the control signals of the CPU 201 and the display control section 203 which have received the signal from the film feeding amount detecting device 209.
The dots are turned off one by one from the left side according to the movement amount, and the number on the film counter 111 is also subtracted.

Originally, the film winding mode display segment 120 for displaying the film winding mode,
Of 121, 122, 123, and 124, the segment corresponding to the film rewind mode set when the film rewind mode is set blinks to notify the photographer of the film rewind mode set.

(Second Embodiment) In the first embodiment, a case has been described in which the photographer can select and set an arbitrary mode from a plurality of film rewinding modes. In a camera that does not have such a film, the microcomputer detects the power supply voltage before film rewinding and determines the rewinding speed according to the power supply voltage, and the determination speed is determined by the film winding mode display segments 120, 121, 122, 123. , 124 to display by “S”, “C _L ”, and “C _H ”. For example, "S" when the power supply voltage is lower than the first predetermined voltage, "CL" when the power supply voltage is between the first predetermined voltage and the second predetermined voltage (> the first predetermined voltage), and "C _L " when the power supply voltage is higher than the second predetermined voltage. " _CH " is displayed.

In the above embodiment, the film winding mode display is performed by using an electric display such as a liquid crystal element. However, operating members such as a rotary lever, a dial and a slide switch are operated, In the case of a camera having a mechanical mode selecting means for directly matching the indicator and the characters displayed in the film winding mode, the film winding mode selected by the operation member can be reset immediately before the film rewinding. Alternatively, the film rewind mode may be displayed.

(Third Embodiment) Next, a configuration for setting the film rewinding time according to the power supply voltage will be described with reference to FIGS. The same components as those in the first embodiment are designated by the same reference numerals and will not be described.

FIG. 15 is a rear view of the camera of this embodiment. In the figure, a rewinding time setting switch 30 composed of a rotary dial switch is provided around the film rewinding button 19. The film rewinding time can be set by rotating the rewinding time setting switch 30 counterclockwise.

FIG. 16A shows a state in which the rewinding time setting switch 30 is in the ON position (T), and FIG.
Indicates the state where the rewinding time setting switch 30 is in the OFF position (L).

FIG. 17 is a control circuit diagram of this camera. The first embodiment (FIG. 5) differs from the input port P of the CPU 201.
The difference is that SWRT, which is the rewinding time setting switch 30, is connected to 19. The other end of this SWRT is grounded. Input port P18 is + voltage (V) via resistor R
, The input ports are pulled up to "H" when the switch SWRT is OFF, and the input ports are "L" when the switch SWRT is ON.

Next, referring to FIGS. 18 and 19, the CPU 20
A sequence flow of the film rewinding operation in the present camera performed in 1 will be described. It should be noted that the portions with the same circled numbers in these figures are connected.

[Step # 301] When the film rewind button 19 is pressed after the stipulation of the number of films loaded in the camera has been completed or the film rewind button 19 has been pressed after the shooting, the film rewind sequence is started. To do.

[Step # 302] The photographer operates the rewinding time setting switch 30 to determine whether or not the rewinding time setting mode is set (SWRT is "ON"). If the rewind time setting mode is set, the process proceeds to steps # 403, 404 to 409 (FIG. 19), and if not set, steps # 303, # 304 and so on.
Go to # 307.

[Steps # 303, 403] B. The C circuit checks the state of the camera power supply voltage immediately before film rewinding.

[Steps # 304 and 404] The film counter (number of shots) of the camera is read.

[Steps # 305, 405] Step #
The shortest film rewinding time (hereinafter, Min time) is predicted from the power supply voltage of the camera checked in 303 and 403 and the number of shot images of the film counter read in steps # 304 and 404. The CPU 201 has
The film rewinding time at a predetermined voltage and a predetermined number of sheets is stored in advance as standard time.

For example, in the case of rewinding all 36 shot films at a power supply voltage of 6 V, the rewinding time is 12 seconds. Since there is an inverse proportional relationship between the film rewinding time and the power supply voltage, and a proportional relationship between the rewinding time and the number of rewinding films, the Min time required for film rewinding is T _min = ((Counter number) / 36 (Number)) ×
It is represented by ((6.0 (V)) / BC voltage) × 12 (seconds). For example, the number of counters: 18, B.I. When the C voltage is 4 V, the Min time is 9 seconds.

[Steps # 306 and 406] Step #
The rewind Min time predicted in 305 and 405 is displayed on the external display 100. Specifically, as shown in FIG. 20, the display segment 101 indicating the shutter time is used to perform display in units of seconds.

This allows the photographer to confirm when the rewinding ends before the rewinding starts. Furthermore, since this predicted time corresponds to the power supply state, it is possible to confirm the degree of deterioration of the power supply by comparing the predicted time with the rewind time corresponding to a new power supply. [Step # 307] Film feeding / rewinding motor M
Drive _F to start film rewinding. When the rewinding time setting mode is not selected, the sequence is ended as it is.

[Step # 407] When the rewinding time setting mode is selected, the rewinding time is set.
The rewind time is set according to the Mi predicted in step # 405.
The maximum time is n hours, and the photographer operates the electronic dial 12 of the camera to change the display of the Min time on the external display device 100. Based on the rewinding time set here, the drive voltage of the rewinding motor M _F is set to C
By controlling the PU 201 and the motor control unit 206, it becomes possible to obtain the set rewinding time.

That is, depending on the situation of the shooting site, rewinding can be performed in the short time (high speed) same as the predicted time to enable quick film exchange, or rewind in the same long time (low speed) as the predicted time. You can change the film as gently as possible.

The rewind set time (T _SET ) is expressed by the following equation.

T _SET = T _min × (B.C voltage) / (motor drive voltage) [Step # 408] Determine the drive voltage of the rewind motor M _F based on the rewind set time set in Step # 407. To do.

As shown in FIG. 21, the method of controlling the motor drive voltage according to the present embodiment performs energization of the motor M _F with a high frequency pulse and changes the duty ratio (hereinafter, PMW ratio) to change the motor drive voltage. The voltage is controlled. Using the symbols in FIG. 21, the PWM ratio is: PWM ratio = b / a = X / 52 a: 1 cycle time of ON / OFF b: ON time, and in the present invention, 1 cycle time of ON / OFF a The ratio of ON time b to X is set to X / 52.

Therefore, from the formula of step # 407, the motor drive voltage = (T _min / T _SET ) × (B.C voltage), and the PWM ratio = X / 52 = ((motor drive voltage / B.C voltage) X52) / 52 = (( _Tmin / _TSET ) / 52) / 52 = _Tmin / _TSET .

[Step # 409] The film feeding / rewinding motor M _F is controlled by the motor control unit 206 according to the PMW ratio determined in Step # 408.
Start rewinding the film. Thus, the film rewinding is completed in a time substantially equal to the rewinding set time.

Regarding the display during film rewinding in this embodiment, the rectangular dots 108 for film state display are turned off one by one from the left side in accordance with the (rewinding) movement amount of the film, as in the first embodiment. As it goes, the number displayed on the film counter 111 may be subtracted.

In the above embodiment, the high speed rewinding mode is displayed by "CH" and the low speed rewinding mode is displayed by "CL", but it may be displayed by "H" and "L" respectively.

In the present embodiment, in addition to the set rewinding time, the rewinding mode corresponding to the rewinding set time may be displayed using the film rewinding mode display segment.

Further, the present invention may be used by combining the above-described embodiments and modified examples, or the technical elements thereof as needed.

(Relationship Between Embodiments and Claims) In the embodiments described above, the external display 100 is referred to as the display device referred to in the claims, and the film winding mode display segments 120 to 124 are referred to as the claims. The winding mode display element includes B. A part of the C circuit 215 and the CPU 201 is a time predicting unit in the claims, the shutter time display segment 101 is a second time display element in the claims, and a part of the CPU 201 and the motor control unit 206 are in the claims. The rewind time setting switch 30 corresponds to the speed control means described in (1), and corresponds to the time selection means in the claims.

The above is the correspondence relationship between each configuration of the present invention and each configuration of the embodiment, but the present invention is not limited to the configuration of these embodiments, and the mechanism or the embodiment described in the claims is not limited thereto. Any structure may be used as long as the function of the structure can be achieved.

[0109]

As described above, in the first invention of the present application, the winding mode display element is also used as the display element in the rewind mode. Therefore, according to the present invention, it is possible to eliminate the need to newly provide the display device with the display element dedicated to the rewinding mode, and the rewinding mode that has been set without increasing the cost or increasing the size of the camera. It is possible to realize a display device capable of confirming at a glance.

In the second invention of the present application, the estimated time, which is the shortest time required for film rewinding, is calculated and displayed based on the power supply state before the start of film rewinding. Therefore, according to the present invention, it is possible to make the photographer confirm when the rewinding ends before the rewinding starts based on the predicted time displayed in advance. Moreover, by displaying the estimated time corresponding to the power supply state, this can be compared with the rewinding time corresponding to a new power supply, and the deterioration degree of the power supply can be confirmed.

If the predicted time is displayed using the shutter-second display element, it is possible to eliminate the need to provide a dedicated display element, which also increases the cost and the size of the camera. Can be prevented.

Further, in the third invention of the present application, the execution time of film rewinding can be appropriately selected within a time period longer than the estimated time (shortest time). Therefore, according to the present invention, depending on the situation of the shooting site, rewind at high speed for quick film exchange, or rewind at low speed for film exchange as quietly as possible. be able to.

Then, as in the fourth invention of the present application, if the above-mentioned display device or film feeding device is mounted on a camera, an easy-to-use camera can be realized.

[Brief description of drawings]

FIG. 1 is a front view of a camera that is a first embodiment of the present invention.

FIG. 2 is a plan view of the camera.

FIG. 3 is a rear view of the camera.

FIG. 4 is a plan view of an external display unit of the camera.

FIG. 5 is a control circuit diagram of the camera.

FIG. 6 is a control circuit diagram of an electronic dial of the camera.

FIG. 7 is an explanatory diagram of an output signal of an electronic dial of the camera.

FIG. 8 is an explanatory diagram showing a display state of the camera during standby.

FIG. 9 is an explanatory diagram of a display state when the winding mode of the camera is set.

FIG. 10 is an explanatory diagram of a display state during film winding of the camera.

FIG. 11 is an explanatory diagram of a display state when the rewind mode of the camera is set.

FIG. 12 is an explanatory diagram of a display state during film rewinding of the camera.

FIG. 13 is an explanatory diagram illustrating a display state during film rewinding of the camera.

FIG. 14 is an explanatory diagram of a display state during film rewinding of the camera.

FIG. 15 is a rear view of the camera of the second embodiment of the present invention.

FIG. 16 is an enlarged view of a back surface portion of the camera of the second embodiment.

FIG. 17 is a control circuit diagram of the camera of the second embodiment.

FIG. 18 is a flowchart showing rewinding time setting of the camera of the second embodiment.

FIG. 19 is a flowchart showing rewinding time setting of the camera of the second embodiment.

FIG. 20 is an explanatory diagram of a display state in the rewinding time setting mode of the camera of the second embodiment.

FIG. 21 is an explanatory diagram of control signals of the rewinding motor of the camera of the second embodiment.

[Explanation of symbols]

1 ... Camera body 10 ... Camera top cover 11 ... Release button 12 ... Electronic dial 13 ... Winding mode setting button 14 ... AF setting button 15 ... Exposure mode setting button 19 ... Film rewinding button 30 ... Rewinding time setting switch 100 ... External Display unit 101 ... Shutter second display segment 107 ... Patrone mark display segment 108 ... Rectangular dot for film status display 111 ... Film counter 120 ... Film winding (rewinding) mode display segment 121 ... Film winding (rewinding) mode display Segment 122 ... Film winding (rewinding) mode display segment 123 ... Film winding (rewinding) mode display segment

Claims (10)

[Claims] 1. A display device having a film winding mode display element for displaying a film winding mode set in a camera, wherein the set film rewinding mode is displayed using the film winding mode display element. Display device. 2. The display device according to claim 1, wherein the rewinding mode for silent operation is displayed by using a winding-up mode display element that displays a winding-up mode for single frame shooting. 3. The display device according to claim 1, wherein the winding mode display element for displaying the continuous shooting winding mode is used to display the normal sound operation rewinding mode. 4. A winding mode display element for displaying a winding mode for high speed continuous shooting is used to display a rewinding mode for high speed operation, and a mode display element for displaying a winding mode for low speed continuous shooting is used to operate at a low speed. The display device according to claim 3, wherein the display rewind mode is displayed. 5. A time predicting means for calculating a predicted time required for film rewinding based on a state of a rewinding drive power source before the start of film rewinding of a camera, the time predicting means being used for calculation. A display device for displaying an estimated time. 6. The time predicting means calculates the predicted time based on the state of a rewinding drive power source, the time required to rewind a predetermined number of film frames, and the number of film frames. The display device according to claim 5, wherein: 7. The camera according to claim 5, further comprising a second display element for displaying a shutter speed of a camera, wherein the predicted time is displayed using the second display element. Display device. 8. A time predicting unit for calculating a predicted time required for film rewinding based on a state of a rewinding drive power source before starting film rewinding of a camera, and a predicted time calculated by the time predicting unit. A time selection means for selectively setting the film rewinding execution time within a long time range, and a speed control means for controlling the film rewinding speed based on the execution time set by the time selection means. A film feeding device. 9. The time predicting means calculates the predicted time based on a state of a rewinding drive power source, a time required to rewind a predetermined number of film frames, and the number of filmed frames. The film feeding device according to claim 5, wherein 10. A camera comprising at least one of the display device according to any one of claims 1 to 7 and the film feeding device according to claim 8 or 9.