JPH05333423A - Camera provided with magnetic writing device - Google Patents

Abstract

PURPOSE:To input and write information on a former frame even after photographing by setting the position of a magnetic head so that data corresponding to each frame of film can be written even after photographing. CONSTITUTION:The magnetic head 25 for writing photographing information is set on the magnetic surface 24 of the former frame 22 exposed just before, and the information on the former frame 22 is written on the magnetic surface 24 of the former frame 22 by the magnetic head 25 at the time of winding a next frame 21 to be exposed by next release, thereby inputting and writing the information on the former frame 22 even after photographing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a magnetic head for writing data on a film having a magnetic surface for recording photographed data.

[0002]

2. Description of the Related Art Conventionally, a film having a magnetic surface formed of a magnetic material so as to be able to read and write photographed data has been disclosed in JP-A-59-7926 and JP-A-60-. It is disclosed in Japanese Patent No. 17447.

When using such a film, the camera is provided with a magnetic head for writing or reading information. FIG. 3 shows the position of the magnetic head in such a conventional camera. With conventional cameras,
This magnetic head 25 is used for the next frame 2 exposed in the next release.
It is arranged at the head position of 1. And when winding up one frame of film in the cartridge direction A after shooting,
The write information set in advance was written on the magnetic surface 23 of the film by the magnetic head 25. The recorded shooting data is used for designating the number of prints at the time of printing and clarifying the shooting situation at the time of development.

[0004]

However, in the above-mentioned conventional camera with a magnetic writing device, during winding of each frame, the magnetic information of the photographing data is written on the magnetic surface corresponding to the photographing frame. Therefore, the information to be written had to be input before shooting. However, if you get an unsuccessful photo for some reason, such as when an obstacle suddenly appears between the subject and the camera when you take a picture after inputting the number of prints, do not cancel the specified number of prints and print. I would like to reset it to, but this is not possible with the method of inputting data before shooting, resulting in useless printing.

In addition to the user input information other than the print number setting, information that does not change significantly before and after shooting such as date and time, place name, and weather, the lively comment that is most suitable for the photographed photograph is It could not be recorded when data could only be entered.

Therefore, a technical problem to be solved by the present invention is to enable data corresponding to each frame of a film to be input even after photographing.

[0007]

In order to solve the above technical problems, in a camera with a magnetic head according to the present invention, a magnetic head unit for writing data for each frame shooting is provided not on the next frame. It was placed in the middle of the writing range of the frame that was shot immediately before, so that the shooting data for that frame could be written even when the film was wound up for the next frame.

[0008]

With the camera constructed as described above, the photographed data corresponding to the photographed frame photographed immediately before is written by the magnetic head at the time of winding after the next frame is photographed. It is not necessary to input all the data to be used, and it is possible to input information even after shooting until the next frame is wound.

[0009]

Embodiments of the camera with a magnetic head according to the present invention will be described below with reference to the drawings. In the camera of this embodiment, a cartridge is used which is driven by the camera so that the film can be sent out to the spool by inserting the film into the body with the front end of the film stored in the case.

FIG. 1 shows the appearance of an embodiment of a camera with a magnetic head according to the present invention. A lens barrel 2 for holding a taking lens 1 is arranged in the center of the front surface of a camera body, and a viewfinder window 3 is arranged above the lens barrel 2. A light projecting window 4 and a light receiving window 5 for distance measurement are provided on both sides of the finder window 3. 6
Is a light emitting unit of a flash built in the camera body. A grip projection 7 is formed on the front surface of the camera body on the side opposite to the flash 6, and a release button 8 is arranged on the upper end surface of the camera body on the grip portion side. A lid 10 that is opened and closed when the film cartridge is taken in and out is provided at the lower end of the camera body on the grip side. When loading or unloading the film cartridge, the camera body can be turned upside down to open the lid 10 as shown in FIG. 2, and the cartridge 9 can be inserted and removed in the direction of the spool shaft. The lid 10 is formed so as to have a predetermined height dimension H, and when the lid 10 is opened with the cartridge 9 loaded, the cartridge 9 is partially exposed so that it can be pinched with a finger. Therefore, the eject mechanism for removing the cartridge is not required. Reference numeral 11 denotes a print number designation button for designating the number of simultaneous prints. Reference numeral 12 is a print unnecessary designation button for setting the number of prints to 0.

FIG. 4 is a first embodiment of the present invention showing the positional relationship between a film having a magnetic surface and a magnetic head for writing and reading information. Magnetic head 2
5 is exposed in the next release, the magnetic surface 23 of the next frame 21
Is arranged not at the position where is located, but at the position where the magnetic surface 24 of the photographed frame (hereinafter referred to as the previous frame) 22 which is photographed immediately before and is wound in the direction A of the cartridge is positioned. Then, when the magnetic surface 24 passes over the magnetic head 25 as the frame 21 is exposed in the next release and rolled up in the direction A of the cartridge, the image of the previous frame 22 taken in the previous release is taken. Information is written on the magnetic surface 24 corresponding to the frame 22. That is, after the exposure of the frame 22, the information regarding the shooting is input, and when the film is wound after the exposure of the next frame 21, the input information is recorded on the magnetic surface 24 of the frame 22. This allows you to enter the information about the frame to be shot after shooting instead of before shooting as before, so you can set the number of prints so that it will not be printed in the case of a failed photo, or you can shoot that photo. You can also leave a comment that is most appropriate for the situation at the moment you do it.

In the first embodiment, the frame 2 which has been photographed is taken.
Since not all of the film 2 is wound up inside the film cartridge 9, but the portion for recording information has to be taken out of the cartridge 9, the width of the camera becomes wider than in the conventional example. In order to reduce the width of the camera, the recording area per frame of the magnetic surface 24 must be shortened.

Therefore, in the second embodiment, as shown in FIG.
In addition to the first embodiment, a magnetic recording control photo interrupter 26 was installed on the perforation 27 side of the film. The photo control interrupter for magnetic control detects the square of the frame. Then, when the magnetic control photo-interrupter 26 detects the perforation 27, which is the leading edge of the frame, at the time of one-time winding of the frame 21 immediately after the image capturing, the information set after the image capturing for the previous frame 22 is stored. Input on the magnetic surface 24 of the top 22,
After the perforation is detected, information about the next frame 21 of the film taken immediately before winding is input to the magnetic surface 23, such as the date and time, place name, weather, etc. set before shooting, which does not change significantly before and after shooting. To do. As a result, the magnetic surface of each frame can be effectively used without increasing the width of the camera.

The electric circuit of the camera of this embodiment will be described below with reference to FIG.

CP shown in the figure indicates a microcomputer (hereinafter, referred to as a microcomputer) for controlling the operation of the camera. FLS is a flash controller,
The light emission operation of the flash 6 built into the camera body is controlled through the microcomputer CP. Further, LM and AF respectively indicate a photometry unit and a distance measurement unit, which perform photometry and distance measurement according to an instruction from the microcomputer CP and feed back respective measurement data to the microcomputer CP. DS denotes a display control unit, which controls the display of various data in a display window (not shown) provided in the camera body. The DTC is a data control unit connected to the magnetic head HD in order to process shooting data for a film. AC is an actuator driving unit, which includes a first motor M1 for prewinding and winding the film and driving the magnetic head unit, a second motor M2 for driving the zooming mechanism of the finder, and a pad of the magnetic head unit in a charged state. Magnet for holding on Mg
Control each. EX / FC is an exposure focus control unit that controls the operation of the third motor M3 that drives the focusing of the taking lens and the release of the shutter. E
N is a zoom encoder that detects the position of the optical system in the zooming mechanism of the finder. PI is a photo interrupter that detects the perforation of the film.

S0 to S10 represent various switches, and the operation of the camera is determined according to the on / off state of these switches. A main switch S0 turns on / off a main power supply (not shown) for operating the camera in the on state. S1 is a photometric switch for performing photometry in the ON state, and S2 is a release switch for performing shutter release in the ON state. The camera of this embodiment is configured such that the release button 8 (see FIG. 1) is a two-step push-down type, and the photometry switch S1 is turned on when the first step is pushed, and then the second step is pushed further to release the camera. The switch S2 is turned on. S3 is a zoom-out switch for changing the pseudo zooming system from the tele side to the wide side, and S4 is a zoom-in switch for changing the wide side to the tele side. The zooming mechanism of the finder is also driven by the switches S3 and S4. A lid switch S5 is turned on when the lid of the cartridge chamber is closed, and the signal of the terminal on the side of the microcomputer CP is switched from the high level to the low level. S6
Is a charge cam position detection switch for detecting a state in which the charge cam acting as an actuator for bringing the magnetic head HD into contact with the film is in the initial position, and is turned on when the charge cam is in the initial position. S7
Corresponds to the on / off state of the flash 6 (see Fig. 1)
It is a flash switch for controlling the on / off of the light emission of. S8 is a battery detection switch which is turned on when a battery is placed in the battery chamber (not shown) and is turned off when the battery is not placed therein. S9 is a print number designation switch 11 (see FIG.
This is a switch for specifying the number of prints that is turned on when (see) is pressed. S10 is a print unnecessary designation switch for setting the print number designation to 0.

The operation of the camera of this embodiment will be described below with reference to the flow chart. In each flow chart, the step of each operation is indicated by the symbol #.

FIG. 7 shows the main routine of the overall operation of the first embodiment of this camera. In the present embodiment, as the first step, step # 001 when the battery serving as the power source of the camera is loaded is set. When the battery is loaded, the battery detection switch S8
Is turned on, and at the same time, a subroutine for initializing the state of the camera is executed and the process proceeds to step # 002.

Step # 002 is a state in which the camera is in a stopped state and waiting for input. When any operation is performed in this state, it is determined in step # 003 whether or not the signal of the lid switch S5 changes from the high level to the low level. That is, when the film cartridge 9 is newly loaded in the cartridge chamber 16, the film is pre-wound, so it is determined in step # 003 whether pre-winding is necessary.

When the signal of the lid switch S5 changes from the high level to the low level in step # 003, the process proceeds to step # 004, and the film is prewound according to the prewind sub-routine. After completion of this prewind, or when the signal of the lid switch S5 does not change from the high level to the low level in step # 003, that is, when the prewind is unnecessary, the main switch S0 is turned on in step # 005. It is determined whether or not the shutter release is possible. Whether or not the shutter release is possible is determined by whether or not the shutter release prohibition flag is set in the memory (not shown) in the microcomputer CP. If the main switch S0 is off or the shutter release prohibition flag is set, the main power source is turned off in step # 006, and then the process returns to step # 002 to wait for input. Is set to.

On the other hand, if the result of determination in step # 005 is that the main switch S0 is on and shutter release is possible, the main power supply is displayed in step # 007, and in the next step # 008, the number of prints of the previous frame is displayed. Specify.

If the print number designation switch S9 is turned on in step # 008, the print number increasing subroutine shown in FIG. 8 is executed in step # 009 to designate the print number.

If the number-of-prints designation switch S9 is off, it is determined in step # 010 whether or not the printing unnecessary designation switch S10 is on.
If the print unnecessary designation switch S10 is turned on, the subroutine for setting the number of prints 0 shown in FIG. 9 is executed in step # 011.

The frame information designated at this time is once written in the memory.

If both of these switches S9 and S10 are off, it is judged at next step # 012 whether or not the photometric switch S1 is on. When the photometric switch S1 is on, the release button 8
This is the state where the step is pushed in, and the shutter release is about to be performed right after the composition is determined as the shooting procedure.

On the contrary, when the composition is about to be determined, the photometric switch S1 is still off, and the zooming operation from step # 013 is performed. Therefore, in that case, it is determined in step # 013 whether or not the zoom-out switch S3 is turned on. If it is turned on, the zoom-out subroutine is executed in step # 014, and the zoom-out of the viewfinder is executed. Is done.

On the other hand, if the zoom-out switch is off, the zoom-in switch S4 is pressed in step # 015.
It is determined whether or not is on. If the zoom-in switch S4 is on, step # 016
The zoom-in subroutine is executed to zoom in the viewfinder. When all of these switches S3 and S4 are off, data display is performed in step # 017 and the state returns to the input waiting state in step # 002.

If it is determined in step # 012 that the photometric switch S1 is on, that is, if the composition has already been determined and shutter release is about to be performed, the battery check is first performed in step # 018. Then, it is determined whether or not the battery voltage required for the subsequent operation is sufficient. If the voltage is sufficient, a subroutine for performing photometry is executed in step # 019.

Then, it is determined whether or not the photometric switch S1 is still kept in the ON state after the photometry is performed in step # 020. That is, it is determined whether or not the release button 8 is kept pressed as it is in the first step. If the photometric switch S1 is turned off, it is determined that a series of photographing operations has been stopped, and the process returns to step # 002 via step # 017, and in this case also, a new input waiting state is entered.

If the photometric switch S1 is maintained in the on state in step # 020, it is determined in step # 021 whether the release switch S2 is on. If the release button 8 is pressed in the second step, the release switch S2 is turned on, and then shutter release based on automatic focus control and automatic exposure control from step # 022 to step # 024 is executed. Further, in step # 025, one frame of film winding and magnetic data recording of shooting information are executed according to the subroutine shown in FIG. After that, the process returns to step # 002 through step # 017. On the other hand, if the release switch S2 is off in step # 021, the photographer is waiting for a photo opportunity, and the process returns to step # 018 to continue photometry until the release switch S2 is turned on.

If the result of the battery check in step # 018 is that the battery is insufficient at the stage where the release button 8 is to be pressed in the second step, step ##
In 026, “B. C. The data of "OUT" is displayed and the state returns to the input waiting state of step # 002. In this case, it is necessary to replace the old battery with a new battery.

Next, details of the print number designation operation shown in step # 009 in this main routine will be described with reference to FIG.

When the subroutine for increasing the number of prints is executed, first, in step # 101, the value of the print count memory M preset in the camera, for example, one is read. Then, in step # 102, the M
After the number of prints to be increased is added to the value and the finally set number of prints is displayed in step # 103, the value is stored in the memory again in step # 104, and the process returns. Main routine step #
When the number of prints is set to 0 in 011,
As shown in step # 105, after the value of the preset print number memory M is read out in step # 105, the value of the print number memory M is set to 0 in step # 106. Then, in step # 107, the number of prints 0 is displayed, in step # 108, M = 0 is stored in the memory, and the process returns.

Next, the winding of one frame of the film and the recording of the magnetic data of the photographing information in step # 025 of the main routine will be described with reference to the subroutine of FIG.

When the release switch is pressed in step # 021 of the main routine and the shutter release based on the automatic focus control and the automatic exposure control from step # 022 to step # 024 is executed, first, the subroutine step # 109. Then, the data information at the moment of shooting such as the exposure value and the aperture value for the next frame 21 is written in the memory.

Subsequently, at step # 110, the magnetic head portion is turned on so as to be in a charged state, and at step # 11.
In 1, the winding motor is activated and the shooting frame starts to be wound. And while winding up, the previous frame 2
The data information such as the exposure value and the aperture value of the previous frame 22 written in the memory in step # 109 at the time of shooting 2 is stored in step # 112 together with the information such as the number of prints of the previous frame 22 input in step # 008 of FIG. Then, in step # 113, information is recorded on the magnetic surface of the film. When the winding is completed, the winding motor stops, and the process returns to step # 002 through step # 017 of the main routine.

Next, the second embodiment shown in FIG. 5 will be described with reference to the flowchart.

FIG. 11 shows the main routine of the overall operation of the second embodiment of this camera. In this embodiment, first, step # of the first embodiment shown in FIG.
The same steps from 001 to step # 007 are performed from step # 201 to step # 207.

Thereafter, a timer check for accepting the set number of prints for a fixed time is performed in step # 2.
It will take place at 08. That is, within this fixed time, the number of prints of the previous frame can be specified in the next step # 209, but when the time-out occurs, the print number set cannot be changed and the process proceeds directly to step # 213.

Hereinafter, from step # 209 to step # 2
The steps up to 27 correspond to steps # 008 to # 026 of the first embodiment shown in FIG.

Also, step # 226 of the main routine.
The winding of one frame of the film and the recording of the magnetic data of the photographing information will be described with reference to the subroutine of FIG.

Step # 22 of the main routine of FIG.
When the release switch is pressed in step 2, and the shutter release based on the automatic focus control and the automatic exposure control from step # 223 to step # 225 is executed, first, the subroutine steps # 301 to # 303.
Then, from step # 109 to step # 11 shown in FIG.
Follow the same steps as 1.

In step # 304, information such as the number of prints of the previous frame 22 input in step # 209 of FIG. 11 is called from the memory and recorded in step # 305. Here, if the perforation of the film is detected by the photo interrupter in step # 306 and the border of the frame is judged, the information of the next frame written in the memory in step # 301 is read in step # 307, and the corresponding frame is read in step # 308. Record information about the next frame on the magnetic surface of. After the winding is completed in step # 309 and the winding motor is stopped in step # 310, the process returns to step # 202 of the main routine through step # 218, but before that, step # 3
In step 11, a timer is set for the timer check performed in step # 208.

By the steps as described above, in the second embodiment, both the information set before shooting and the information set after shooting can be recorded for one shooting frame.

[0045]

As described above, in the camera with the magnetic writing device of the present invention, the magnetic head for writing information is arranged at the position where the previous frame is located, so that the information about the corresponding frame is written even after the photographing. Since it is possible to enter the number of sheets to finally print after shooting, you can record lively comments that are most suitable for the shot photos, and you can enter information before shooting Is also effective because it expands the range of information that can be input.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of one embodiment of a camera with a magnetic head according to the present invention.

FIG. 2 is a front view showing a state in which a lid of the camera of FIG. 1 is opened and a film cartridge is inserted / removed.

FIG. 3 shows a conventional camera capable of writing information,
FIG. 6 is a schematic diagram showing a positional relationship between a film having a magnetic surface and a magnetic head for writing and reading information.

FIG. 4 is a schematic diagram of a first embodiment of the present invention showing a positional relationship between a film having a magnetic surface and a magnetic head for writing and reading information.

FIG. 5 is a schematic diagram of a second embodiment of the present invention showing the positional relationship between a film having a magnetic surface and a magnetic head for writing and reading information.

FIG. 6 is a circuit block diagram of the camera of this embodiment.

FIG. 7 is a flowchart showing a main routine of operation of the camera of the first embodiment of the present invention.

FIG. 8 is a flowchart showing a subroutine of an operation for increasing the number of printed sheets in the embodiment of the present invention.

FIG. 9 is a flowchart showing a subroutine of an operation of setting 0 prints in the embodiment of the present invention.

FIG. 10 is a flowchart showing a subroutine of information recording and one frame winding operation in the camera of the first embodiment of the present invention.

FIG. 11 is a flowchart showing a main routine of operation of the camera of the second embodiment of the present invention.

FIG. 12 is a flowchart showing a subroutine of information recording and one-frame winding operation in the camera of the second embodiment of the present invention.

[Explanation of symbols]

 1 Photographic lens 2 Lens barrel 3 Finder window 4 Light emitting window 5 Light receiving window 6 Flash light emitting part 7 Grip projection 8 Release button 9 Film cartridge 10 Lid 11 Number of print designation button 12 No print designation button 21 Photographed frame 22 Photographed frame immediately before taken 23 21 Magnetic surface of 21 24 Magnetic surface of 22 25 Magnetic head 26 Photointerrupter for magnetic recording control 27 Perforation

Claims (3)

[Claims] 1. A camera using a magnetic information writable film, wherein the means for sending the film one frame at a time after the end of shooting and the position of the taken frame sent immediately after the shooting are arranged. A camera having a magnetic head, means for setting write information for a frame immediately after shooting, and means for writing the write information on the film by the magnetic head when the film is fed immediately after shooting the next frame. 2. A means for setting writing information before photographing, and a means for causing the magnetic head to write the writing information set before photographing on the film when the film is fed immediately after photographing the next frame. The camera according to claim 1, wherein: 3. When the photographing is performed without inputting the photographing information, the camera has means for writing standard data common to each frame to the film by the magnetic head. The camera described in 1.