JPH1130801A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent failure such as the double exposure of an exposed frame and to perform the feeding of film to an unexposed frame in the case of reloading the film rewound halfway by performing the feeding of the film until an unexposed frame set by a feeding amount setting means. SOLUTION: In the case of reloading the film rewound by 20 frames, an idle feeding mode is displayed on a display means 7. A CPU 1 detecting the reloading of the film drives a film feeding means 4 in accordance with data on the number of idly fed frames stored in an EEPROM 2 in a state where the number of the idly fed frames is displayed and the idle feeding mode is set, so that a feeding motor 5 is normally rotated and the idle feeding for winding the film by 20 frames is started. In the midst of the idle feeding, data imprinting is inhibited and also the opening/closing actuation of a shutter is inhibited. Thus, the exposed frame is prevented from being doubly exposed or new data is prevented from being imprinted on the exposed frame in the midst of idly feeding the film for certain.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of reusing a film which has been photographed up to an intermediate frame from an unphotographed frame.

[0002]

2. Description of the Related Art In an automatic film-loading camera using 35 mm film, when a film photographed up to an intermediate frame is loaded into the camera again, the shutter is released by the number of photographed frames and the film is wound up to an unphotographed frame. There is something to do.

[0003] Also, Japanese Patent Application Laid-Open No. 5-88243 discloses that
A camera that stores the number of frames captured during rewinding of the film in the electrical storage means, and winds the film up to the number of captured frames stored in the electrical storage means when the film is reloaded into the camera. Proposed.

[0004] More recently, cameras using a film having a magnetic data recording section have been frequently used. In such a camera, the presence or absence of magnetic data recorded in a photographed frame is determined by a magnetic reproducing head or the like. By detecting, the film can be wound up to the unphotographed frame.

[0005]

However, when winding up the film while releasing the shutter, it is necessary to perform this operation in a dark room in order to prevent double exposure of already taken frames. In the case of a camera equipped with a function for imprinting data during film feeding, if the data imprinting is not set to the OFF mode, the data will be duplicated when the shutter is released consecutively. There is a drawback that it is imprinted on. Furthermore, if a camera using a film on which magnetic data information can be recorded is wound up while releasing the shutter, the magnetic data is newly overwritten and recorded on the already recorded magnetic data, and the recorded contents are corrected. There are drawbacks.

Further, in a camera constructed so that the film can be wound up to an unphotographed frame by detecting the presence or absence of magnetic data by using a reproduction head to detect a photographed frame, a camera generated from a reproduction circuit, a feeding motor, or the like. Since a component or the like that shields the magnetic field is required, the size of the camera may be increased and the cost may be increased.

On the other hand, in the camera proposed in the above-mentioned publication, since the capacity of the electric storage means is limited, usually only the number of photographed frames of a few films can be stored, or the same kind of film (for example, ISO) And the same maximum number of frames, etc.), the film cannot be distinguished, and as a result, there is a risk that the number of frames to be fed is incorrect and double exposure is performed.

Accordingly, the present invention provides a camera capable of feeding a film to an unphotographed frame when reloading a film that has been rewound in the middle without causing inconvenience such as double exposure of a photographed frame. It is intended to be.

[0009]

In order to achieve the above object, according to the present invention, a film feed amount (for example, the number of taken frames of a loaded film) according to an operation of an operation means is provided.
And a feed control means for feeding the film until the feed amount reaches the set amount by the feed amount setting means after the film is loaded.

That is, if the photographer inputs and sets the number of previously shot film frames (the number of rewinded frames) through the operating means, the film is automatically wound up to the number of frames after the film is loaded. A so-called cueing of an unphotographed frame can be performed without performing a shutter release on a frame already photographed in a dark room as in the related art.

In the above invention, the film loading may be detected by closing the camera back cover or the like, and the film feeding by the feed control means may be automatically started. The film feed may be started accordingly.

Further, it is desirable that the shutter operation is regulated during the film feeding by the feed control means so as to reliably prevent double exposure of the photographed frames.

Further, when a means for imprinting data on the film or recording magnetic data is provided, a regulating means for regulating data imprinting and magnetic data recording during film feeding by the feed control means is provided. It is desirable to ensure that data is not overwritten.

If the film is not fed by the feed control means within a predetermined time after the feed amount is set, the feed amount setting is canceled so that, for example, the film that has been rewound halfway is reloaded. It is desirable to make it possible to smoothly perform the normal cueing of the first frame when a new film is loaded after the feed amount is set with the intention to do so.

Further, when the film is rewound halfway, a display means for displaying the amount of film rewound halfway is provided so that even if the photographer inadvertently rewinds without confirming the number of frames already shot, It is desirable that the feed amount (the number of shot frames) to be set when reloading the film can be clearly recognized.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 6 shows a 35 mm film camera according to a first embodiment of the present invention. In this figure, 100 is a camera body, and 101 is a release button. Reference numeral 7 denotes display means such as an LCD.
Reference numeral 03 denotes an idle-feeding frame number setting switch for setting the number of frames to be skipped (a captured frame is sent out of the loaded film). Reference numeral 3 denotes a film loaded in the camera up to an intermediate frame and no shooting. This is a midway rewind switch that is operated to rewind the film when replacing the film with another film while the number of frames remains.

FIG. 1 shows the configuration of the control unit of the camera. In FIG. 1, reference numeral 1 denotes a CPU (feed control means) which performs all sequence control of the camera, such as shutter control, film feed control, time measurement, and the like.

The CPU 1 transmits and receives data to and from an EEPROM 2 which is an electrical storage means for retaining the stored contents even when the power is turned off. This EEP
The ROM 2 stores the number of winding frames and the like set by a setting operation to be described later when the film loaded in the camera is wound, and the CPU 1 can read and write the stored contents. In addition,
The EEPROM 2 may be built in the CPU 1.

The midway rewind switch 3 is connected to the CPU 1. When the rewind switch 3 is turned on, the CPU 1 controls the film feeding means 4 to control the rewinding of the film.

The film feeding means 4 has a motor driver (not shown) controlled by the CPU 1, and a feeding motor 5 for performing forward rotation, reverse rotation drive and braking operation is connected to the motor driver. Have been. When the feed motor 5 rotates forward, the film is wound up.
When the feeding motor 5 rotates in the reverse direction, the film is rewound.

The CPU 1 is connected to a film moving amount detecting means 10. The film moving amount detecting means 10 is constituted by, for example, a photo-interrupter including a light emitting element and a light receiving element, and a film side edge having a perforation is disposed between the light emitting element and the light receiving element. You.

The film moving amount detecting means 10
The perforation is located between the light emitting element and the light receiving element, and is turned on when light from the light emitting element passes through the perforation and is received by the light receiving element. It turns off when the light from the light emitting element is reflected off the film and is not received by the light receiving element. In this way, the ON signal from the film movement amount detecting means 10 is sent to the
When it is input to the CPU 1, the CPU 1 can detect the film feed amount by counting the number of times the ON signal is input. For example, in the case of 35 mm film, eight perforations are usually formed for one frame, so that if the ON signal is input eight times, it is possible to detect that one frame of film has been fed. .

The CPU 1 is connected to a film loading detection switch 11 which is turned on when the back cover for opening and closing the film loading chamber of the camera is closed and turned off when opened.

Further, display means 7 is connected to the CPU 1. The display means 7 displays photographing information (shutter speed, aperture, etc.) of the camera, as well as the number of rewinding frames when a later-described film rewinding is performed.

The CPU 1 is connected to a data imprinting means 8. The data imprinting means 8 causes an LED or the like to emit light at the time of shutter release, and imprints data such as a photographing date and time and a message on a film together with a subject.

Further, the CPU 1 is connected to an idle feed frame number setting means (feed amount setting means) 6. The idle feed frame number setting means 6 is provided with the idle feed frame number setting switch 1 described above.
The number of idle feed frames (feed amount) corresponding to the number of photographed frames is set in accordance with the number of times 03 is turned on.

Next, the operation of the control unit thus configured will be described with reference to the flowcharts of FIGS.
First, FIG. 2 shows a processing routine for rewinding the film loaded in the camera halfway. Steps (hereafter,
In S30, the camera is in a standby state, in which the film loaded in the camera is partially photographed, for example, 36 sheets of film are loaded, and the camera is in a state of being photographed up to the 20th frame. It will be described as.

In such a state, the CPU 1 determines whether or not the halfway rewind switch 3 has been turned on for film exchange in S31. If the halfway rewind switch 3 has been turned on, the CPU 1 determines in S32 that the halfway rewind switch 3 has been turned on. The drive of the motor driver of the film feeding means 4 is controlled in accordance with the signal generated by the control unit 5 to rotate the motor 5 in the reverse direction.

When the motor 5 is rotated in the reverse direction to start rewinding the film, the CPU 1 starts counting the number of rewinding frames through the film moving amount detecting means 10 in S33. If it is determined in S34 that the film has been rewound to the state where the film leader section is left, the motor 5 is stopped and the rewound is terminated.

After the end of rewinding, the number of rewinding frames is blinked on the display means 7 in S35. Thus, the photographer can confirm the number of rewinding frames and can remember the number of frames.

When the rewinded film is taken out of the camera while leaving the leader section, this is detected through the film loading detection switch 11 in S36, and the number of rewind frames blinking on the display means 7 is displayed in S37. As "zero," the process enters a standby state in S40.

FIG. 3 shows a processing routine when a film is loaded in a camera. S1 shows the same state as S40 in FIG. 2, that is, a standby state where the film is taken out of the camera.

In this state, in step S2, the number-of-split-frames setting means 6
It is determined whether or not the number of idle feed frames has been set. If the number of empty frames has not been set, it is determined that a new film is loaded in S3, and the process proceeds to S4.

In step S4, idle feeding (winding) of the film leader is started. Further, in S5, the imprinting of data on the film by the data imprinting means 8 is prohibited.
Further, in S6, it is determined whether or not a predetermined amount of idle feeding required for setting the first frame of the film to the aperture position of the camera has been completed, and if completed, the process enters a standby state in S7. Thereafter, normal photographing becomes possible. Each time the shutter is released in S8, one frame is wound up in S9, and during the winding, data is imprinted in S10. Then, after detecting that the winding of one frame is completed in S11, it is determined in S12 whether or not the winding of all the frames is completed. When the winding of all the frames is completed, the process proceeds to S38 in FIG. Is started.

In step S38, the CPU 1 controls the driving of the motor driver of the film feeding means 4, rotates the feeding motor 5 in reverse, and rewinds the photographed film.
If it is detected in step 9 that the rewinding has been completed, the display of the number of frames is set to "zero" in step S41, and a standby state is set in step S40.

On the other hand, if the number of idle feed frames is set in S2, the process proceeds to S13 on the assumption that the film that has been rewound halfway is reloaded into the camera. In this S13, for example, when reloading a film that has been rewinded by 20 frames, the fact that the photographer is in the idle feed mode is displayed on the display means 7 according to the operation of the idle feed frame number setting switch 103, and “20” is displayed in response to the on-operation of the idle feed frame number setting switch 103 twenty times. Also, "20" is stored in EEPROM2.
Is stored.

At the same time as the display of the number of idle feed frames, time counting is started in S14, and it is determined whether or not a predetermined time has elapsed in S15. Until the predetermined time has elapsed, the film loading is detected in S16. If the loading of the film is not detected through the switch 11, the flow advances to S21 to release the idle feeding mode, reset the set number of idle feeding frames, and return to the standby state of S1.

If the loading of the film is detected in S16 before the predetermined time elapses, the process proceeds to S17, in which the CPU 1
In the state where the number of idle feed frames is displayed and the idle feed mode is set, the drive of the film feeding means 4 is controlled in accordance with the idle feed frame number data stored in the EEPROM 2 in S13, and The motor 5 is rotated forward to start the idle feeding for winding up the film for 20 frames. During the idle feeding, data imprinting is prohibited in S18, and the opening and closing operation of the shutter is also prohibited. This makes it possible to reliably prevent double exposure or imprinting of new data on the already shot frames during the idle feeding of the film.

Next, in S19, it is determined whether or not the idle feeding for the set number of frames has been completed.
At the aperture position of the camera, the film of (the number of empty feed frames + 1 frame) is set at the aperture position of the camera so that the next frame can be taken from the first unphotographed frame, and the set frame is the (the number of empty feed frames + 1 frame). Is displayed on the display means 7, and a standby state is set in S7 in preparation for photographing of this frame. For example, when the number of idle feed frames is 20, the number of frames set at the aperture position is the 21st frame, and "21" is also displayed on the display means 7.

As described above, according to the present embodiment, when reloading a film that has been rewound halfway and taking a picture, first, the idle feed mode setting switch 103 is operated to set the idle feed mode. Since the film is automatically re-loaded after setting the number of empty frames corresponding to the number of frames when the film is rewound, the film is automatically empty- fed by the set number of frames. The photographer does not need to release the photographer many times in the dark room as in the related art, and the wrong number of frames is not fed. Therefore, the operability when reusing the film that has been rewound halfway can be improved.

In the present embodiment, the ON signal of the film load detection switch 11 is used as a signal for reloading the intermediate rewind film and starting the idle feeding. However, an instruction to start the idle feeding of the reloaded film is given. A dedicated operation means (for example, an idle feeding start switch) may be provided, and the idle feeding may be started by a signal from the operating means.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention.
1 illustrates a control unit of a camera using a film capable of recording magnetic data according to an embodiment. Note that the basic configuration of the present embodiment is the same as that of the first embodiment, and common elements are denoted by the same reference numerals and description thereof will be omitted.

In this embodiment, instead of the data imprinting means 8 of the first embodiment, a film information recording means (data) for recording magnetic data such as photographing date and time and photographing conditions in a magnetic recording section of the film at the time of photographing. Recording means) 18.

FIG. 5 shows a processing routine for loading a film in the control section of the camera of this embodiment. This processing routine is also substantially the same as the processing routine of the first embodiment, and S51 to S70 correspond to S1 to S20 of the first embodiment, respectively.

The differences from the first embodiment are S55 and S68 corresponding to S5 and S18 in the first embodiment. In these steps, the film information is recorded by the film information recording means 18 to the magnetic recording unit during the idle feeding. Recording of magnetic data is prohibited. As a result, it is possible to reliably prevent new data from being overwritten on the magnetic recording portion of the photographed frame during the idle feeding of the film.

In each of the embodiments described above, the case where the number of idle feed frames is set in advance before the film is loaded into the camera has been described. However, in the present invention, the first frame after loading the film into the camera is described. The idle feed frame number may be set in the standby state after the idle feed is completed.

[0047]

As described above, according to the present invention,
If the photographer inputs and sets the number of previously shot film frames (the number of frames rewinded halfway) through the operating means, the film is automatically wound up to that number of frames after reloading the film that was rewinded halfway. Therefore, the so-called cueing of the unphotographed frame can be reliably performed without performing the shutter release on the frame already photographed in the dark room as in the related art.
Operability can be improved. In addition, since the photographer inputs and sets the number of frames already taken on the film each time the film is reloaded, there is no limit to the number of films that can be used, and a magnetic data reproduction circuit and the like are employed. It is possible to realize an inexpensive and small camera as compared with a camera.

If film loading is detected and film feeding is automatically started, film feeding can be started immediately without any operation after film loading, so that operability is improved. Can be.

During the film feeding by the feed control means, the shutter operation, the data imprinting and the magnetic data recording are regulated so that double exposure and overwriting of the already taken frames can be reliably prevented. Can be.

Further, if the feed amount is canceled when the film is not fed by the feed control means within a predetermined time after the feed amount is set, for example, the film that has been rewound halfway may be re-started. After setting the feed amount with the intention of loading, if a new film is loaded with reconsideration, it is possible to prevent unnecessary film feeding of unphotographed frames, and smoothly locate the first frame of the normal frame. It can be carried out.

Further, if a display means is provided for displaying the amount of film that has been rewound halfway when the film is rewound halfway, if the photographer inadvertently rewinds without confirming the number of frames already shot, However, it is possible to clearly recognize the feed amount (the number of shot frames) to be set when reloading this film.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control unit of a camera according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a procedure of a midway rewind process of the control unit.

FIG. 3 is a flowchart illustrating a processing procedure when the control unit loads a film.

FIG. 4 is a block diagram of a control unit of a camera according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing a processing procedure when loading a film by a control unit according to the second embodiment.

FIG. 6 is an external perspective view of a camera according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 2 EEPROM 3 Halfway rewind switch 4 Film feeding means 5 Feeding motor 6 Empty feeding frame number setting means 7 Display means 8 Data imprinting means 10 Film moving amount detecting means 11 Film loading detecting means 18 Film information recording means 103 Number of empty feed frames setting switch

Claims (9)

[Claims] 1. A feed amount setting means for setting a feed amount of a film in accordance with an operation of an operation means, and a feed control means for feeding a film after loading a film until the feed amount reaches the set amount by the feed amount setting means. A camera comprising: 2. The camera according to claim 1, wherein the amount set by the feed amount setting means is the number of photographed frames of the loaded film. 3. The apparatus according to claim 1, further comprising a load detecting unit for detecting that a film has been loaded, wherein said feed control unit starts film feeding in response to a detection signal from said load detecting unit. Item 1
Or the camera according to 2. 4. The camera according to claim 1, further comprising a feed start operation means for instructing a start of film feed by said feed control means. 5. The camera according to claim 1, further comprising a regulating unit that regulates a shutter operation during film feeding by said feeding control unit. 6. A data imprinting means for imprinting data on a film, comprising: a regulating means for regulating imprinting of data by the data imprinting means during film feeding by the feed control means. The camera according to any one of claims 1 to 5, further comprising: 7. A data recording means for recording magnetic data on a film, and a restricting means for restricting recording of magnetic data by the data recording means during film feeding by the feed control means. The camera according to any one of claims 1 to 6, wherein: 8. The feed amount setting means cancels the setting of the feed amount when the film feed by the feed control means is not performed within a predetermined time after the feed amount is set. The camera according to claim 1. 9. The camera according to claim 1, further comprising display means for displaying an amount of the film that has been rewound halfway when the film is rewound halfway.