JPH04158346A - Information recording device for camera - Google Patents

Abstract

PURPOSE:To surely record information even when a camera is vibrated by outputting a warning signal if the vibration detection output of the camera becomes a preset value or above when information is recorded. CONSTITUTION:The information of a film 101 fed by a film feeding means 100 is recorded by the first recording means 102. The vibration of a camera is detected by a vibration detecting means 103, if the detected value becomes a preset value or above, a warning signal is outputted from a control means 104A, and the means 102 is controlled. The information recording camera surely recording information even when vibrated is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an information recording device for a camera that improves the reliability of information recording against vibrations applied to the camera.

B. Prior Art Conventionally, cameras have been proposed that are equipped with an information recording device that records various information on a magnetic recording medium on film.

FIG. 8 shows a camera 1 equipped with this kind of information recording device,
A film cartridge 2 used in the camera 1 is shown.

Cartridge 2 is installed in film chamber 3 of camera 1.

The film 4 loaded and pulled out from the cartridge 2 passes through an aperture 5 and is wound up by a winding Lisbourg 6. Each photographic frame on the film 4 is aligned to a position facing the aperture 5 and exposed.

Further, a magnetic track 7 is provided on the film 4 at least in the lower longitudinal direction of the exposure screen.

A magnetic head 8 is provided in a notch in a pressure plate 10 of the back cover 9 so as to face the magnetic track 7.

After each photographic frame on the film 4 is exposed by a shutter (not shown) in the aperture 5, the film 4 is wound up by one frame by the take-up spool 6. Information regarding photography is recorded on the magnetic track 7 by the magnetic head 8 in synchronization with this one-frame feeding.

C6 Problems to be Solved by the Invention By the way, cameras are subject to vibrations applied from the outside and vibrations generated by the operation of various actuators and mechanisms inside.

FIG. 9 shows data obtained by measuring the vibration of the camera in a general usage condition from the time of shutter release to the completion of one frame advance of the film 4, where the vertical axis shows the vibration amplitude and the horizontal axis shows time.

As shown in the data, in a series of shooting sequences, 6
Large vibrations have been recorded. First, the vibration at time 1 is caused by the photographer's operation of the shutter release, and at time 2, the vibration occurs when the main mirror (not shown) inside camera 1 is retracted from the optical axis of the photographing lens. At time t3, the shutter drive unit when the shutter front curtain in the aperture 5 moves; at time t4, the shutter drive unit when the shutter rear curtain moves; From time t5 to time t6, the film feeding motor and the feeding mechanism unit operate from the start to the completion of feeding one frame of the film 4 after exposure.

As mentioned above, the shooting information is recorded while the film 4 is being fed one frame, that is, after the feeding motor is started, the feeding speed of the film 4 is stabilized, and then the feeding motor is stopped and immediately before the one frame speeding is finished. It is carried out between At this time, if the magnetic head 8 and the magnetic track 7 are not in close contact, the recording signal may become weak due to spacing loss, or in extreme cases, there is a risk that no information will be recorded at all.

However, in the conventional camera information recording device, the 9th
As shown in the figure, although photographic information is recorded during film feeding, which is subject to a lot of vibration, there is a problem in that the reliability of information recording is low because no protection measures are taken against vibration.

An object of the present invention is to provide an information recording device for a camera that can reliably record information even when the camera vibrates.

06 Means for Solving the Problems The present invention according to claim 1 will be explained in conjunction with FIG. 1(a) which is a diagram corresponding to claims. a first recording means 102 for recording various information on the film 101; a vibration detection means 103 for detecting camera vibration;
The above object is achieved by providing a control means 104A that outputs a warning signal when the vibration detected by the vibration detection means 103 exceeds a predetermined value while the recording means 102 is recording information.

The present invention according to claim 2 will be explained with reference to FIG. 1(b) which is a complaint correspondence diagram. The control means 104B of the information recording device of the camera is configured to control the camera when the vibration of the camera exceeds a predetermined value during information recording. Then, after rewinding the film 101 to the information recording start position, the film 101 is fed again, and during this time, the film feeding means 100 and the first recording means 1 are operated so as to record the information on the film 101 again.
Controls 02.

The present invention according to claim 3 will be explained in conjunction with FIG.
The control means 104C causes the second recording means 106 to record information on a recording medium 105 other than the film 101 when the vibration of the camera exceeds a predetermined value during information recording.

The present invention according to claim 4 will be explained in conjunction with FIG.
The control means 104D causes the second recording means 106 to record the information on the recording medium 105 other than the film 101 when the information re-recording operation is performed a predetermined number of times.

Further, the vibration detecting means 103 of the camera information recording device according to the fifth aspect detects the vibration of the mounting member to which the recording head of the recording means 102 is attached.

Control means 10 for the camera information recording device according to E1 action claim 1
4A is an information recording apparatus for a camera according to claim 2, wherein when the vibration detected by the vibration detection means 103 exceeds a predetermined value while the first recording means 102 is recording information, a warning signal is generated. Control means 10
4B, when the vibration of the camera exceeds a predetermined value during information recording, the film 101 is rewound to the information recording start position and then the film 101 is fed again, during which information is recorded on the film 101 again. 4. A control means 10 for a camera information recording apparatus according to claim 3, characterized in that the film feeding means 100 and the first recording means 102 are as follows.
4C causes the second recording means 106 to record information on a recording medium 105 other than the film 101 when the vibration of the camera exceeds a predetermined value during information recording.

Control means 10 for a camera information recording device according to claim 4
In the 4D, when the information re-recording operation is performed a predetermined number of times, the second recording means 106 records the information on the recording medium 105 other than the film 101.

The vibration detecting means 103A of the camera information recording device according to the fifth aspect detects the vibration of the mounting member to which the recording head of the first recording means 102 is attached.

F. Embodiment FIG. 2 is a block diagram showing the overall configuration of an apparatus according to an embodiment. Note that devices similar to those shown in FIG. 8, which shows a conventional device, are given the same reference numerals and explanations will be omitted.

11 is a vibration detector that detects vibrations of the camera; 12 is a vibration detector that detects vibrations of the camera;
A photometry device that measures light within a shooting screen and outputs brightness information, 1
3 is a motor drive circuit that drives the film feeding motor M; 14 is a shutter mechanism section 15 and an aperture mechanism section 16;
This is an exposure control section that controls the Further, 17 is a recording circuit that records photographic information on the magnetic track 7 on the film 4 via the magnetic head 8, and 18 is a display circuit that drives a display 19 provided in the finder of the camera 1.

Furthermore, SWI is the power switch for camera 1, SW2 is the switch that is turned on when the shunter release is pressed halfway, and SW3 is the switch that turns on when the shunter release is pressed halfway.
is the switch that turns on when the shutter release is fully pressed, S
W4 is a film 4 rewind switch.

Reference numeral 2o denotes a control circuit comprised of peripheral components such as a microcomputer and a memory 20m, which executes a control program to be described later to control information recording when camera vibration is detected.

FIG. 3(a) is a longitudinal sectional view of a portion of the magnetic head 8 showing a first embodiment of the vibration detector 11, and FIG. 3(b) is a circuit diagram thereof. This vibration detector 1], A is.

Vibration of the mounting member of the magnetic head 8 is detected by the switch. Note that devices similar to those shown in FIG. 8, which shows a conventional device, are given the same reference numerals and explanations will be omitted.

2, a pressure plate 25 is provided inside the back cover 9 to face parts 26a and 26b of the camera body forming the aperture 5, and is biased by a spring 27 to press the film 4 against the aperture 5. has been done. 2
8 is a support member for the magnetic head 8 having spring properties;
One end thereof is fixed to the pressure plate 25. The magnetic head 8 is pressed against the film 4 through a notch provided in a part of the pressure plate 25 by the spring force of the support member 28 .

Moreover, If! 1 body 2
9a, a fixed contact 29b and a movable contact 29c.

When the magnetic head 8 vibrates due to the vibration of the camera 1, the support member 28 pushes the movable contact 29'c and comes into contact with the fixed contact 29b, so the switch 29 is closed and controlled as shown in FIG. 3(b). The input terminal 20a of the circuit 20 is connected to ground. Note that the vibration level detected by the switch 29 is adjusted by adjusting the mounting intervals of the movable contact 29c, the fixed contact 29b, and the support member 28, so that vibrations at a level that poses a problem for information recording can be detected.

Next, FIG. 4(a) is a longitudinal sectional view of a portion of the magnetic head 8 showing a second embodiment of the vibration detector 11, and FIG. 4(b) is a circuit diagram thereof. This vibration detector 11B detects leakage magnetic flux from the magnetic head 8. Note that the same reference numerals are given to the same equipment as in FIG. 3(a) and FIG. 8 showing the conventional device described above, and the explanation thereof will be omitted.

A coil 31 is provided inside the camera body 26b facing the magnetic head 8, and detects leakage magnetic flux from the magnetic head 8. Also, 32 is.

The amplifier 33 that amplifies the leakage flux detection signal detected by the coil 31 is a comparator that outputs a signal when the level of the detection signal becomes below a set value. The set value of this comparator 33 may be set to a value corresponding to a vibration level that may interfere with information recording. Note that the detection signal of the amplifier 32 may be directly output to the control circuit 20, and the control circuit 20 may determine whether the level of the detection signal is at a level that would interfere with information recording.

When information is recorded on the magnetic track 7 on the film 4 by the magnetic head 8, leakage magnetic flux from the magnetic head 8 passes through the camera body 26b and reaches the coil 31. When the camera 1 vibrates and the magnetic head 8 separates from the film 4, the leakage magnetic flux detected by the coil 31 becomes weaker. This leakage flux detection signal is amplified by an amplifier 32 and then compared with a set value by a comparator 33. Then, when the vibration becomes less than the set value, a vibration detection signal is output to the control circuit 20. That is, it is detected that the magnetic head 8 is separated from the film 4 due to the vibration, and that the information recording operation is incomplete.

FIG. 5(a) is a longitudinal sectional view of a portion of the magnetic head 8 showing a third embodiment of the vibration detector 11, and FIG. 5(b) is a circuit diagram thereof. This vibration detector 11C uses an acceleration detector for vibration detection. In addition, the above-mentioned figures 3(a) and 4(a)
) and devices similar to those shown in FIG. 8, which shows a conventional device, are given the same reference numerals and their explanations will be omitted.

35 is an acceleration detector made of a piezoelectric material or the like, which is fixed to the opposite side of the support member 28 from the magnetic head 8, and when the piezoelectric material is deformed by the vibration of the magnetic head 8, it generates a voltage according to the acceleration at that time. .

Further, 36 is an amplifier which integrates the acceleration signal from the acceleration detector 35, converts it into vibration amplitude, and amplifies it. 37 is a comparator that outputs a signal when the amplified detection signal exceeds a set value. The set value of the comparator 37 may be set to a value corresponding to a vibration level that poses a problem in recording information.

Note that the detection signal of the amplifier 36 may be directly output to the control circuit 20, and the control circuit 20 may determine whether the level of the detection signal is at a level that would interfere with information recording.

When the magnetic head 8 vibrates, the acceleration detector 35 detects the vibration acceleration, and the amplifier 36 converts it into a vibration amplitude amount. When the vibration amplitude exceeds a set value by the comparator 37, a vibration detection signal is output to the control circuit 20.

FIG. 6 is a flowchart showing an information recording control program executed by the control circuit 2o. The operation of the information recording device will be explained using this flowchart.

When the power switch SWI of the camera 1 is turned on, execution of this program is started. In step S1 after execution, the switch SW2 determines whether the shutter release is pressed halfway, and if it is pressed halfway, step S1 is executed.
2, the subject brightness is measured by the photometer 12, and the film sensitivity information previously read from the film cartridge 2 and stored in the memory 20m is read.

In step S3, the appropriate exposure of the subject is calculated from the brightness information and film sensitivity information of the subject, and in the subsequent step S4, the shutter speed and aperture value are displayed on the display 19 in the finder. Further, in step S5, photographing information such as the photographing date to be recorded on the magnetic track 7 on the film 4 and the exposure value calculated in the above step is temporarily stored in the memory 20m in the control circuit 20.

In step S6, it is determined whether there are any frames remaining on the film 4 that can be photographed, and if there are, step S7
If not, proceed to step S9. In step S7, the switch SW3 determines whether the shutter release has been fully pressed. If it has been pressed fully, the process advances to step S8 to execute the shutter release routine shown in FIG. 7; if it has not been pressed fully, step S1
Return to If step S6 is negative, step S9
Then, it is determined whether the rewind switch SW4 has been operated. If rewinding, proceed to step 810;
After rewinding the film 4 into the cartridge 2 by rotating the film feeding motor M in the reverse direction, execution of the program ends.

Note that if the rewind switch SW4 is not operated in step S9, the process returns to step S1.

Next, the information recording operation after shutter release will be explained using the release routine shown in FIG.

First, in step Sll, the information recording redo count counter n is cleared, and then, in step S12, exposure is performed. In the following step S13, the film feeding motor M is started, and the process proceeds to step S14, where the signal input circuit of the input terminal 20a is closed to enable input of the vibration detection signal from the vibration detector 11, and vibration detection is started. Then, in step S15, the photographing information stored in the memory 20m is read out and recording on the magnetic track 7 on the film 4 via the magnetic head 8 is started. In the following step S16, it is determined whether information recording is completed, and if it is completed, step S1
7, the signal input circuit of the input terminal 20a is opened and vibration detection is completed. In step 818, it is determined whether one frame feeding is completed and the next frame to be photographed is aligned at a position facing the aperture 5. When the feeding is completed, the process proceeds to step S19 and the motor M is stopped.

In step S20, the vibration detector 11
determines whether a vibration detection signal is input from
If it is not detected, the process advances to step S21, the warning display is stopped, and the process returns to the main program. Note that the comparator 33 shown in FIG. 4(b) and FIG. 5(b)
, 37, when detecting vibration using a vibration detector that does not have the input terminal 20a during one frame feeding by the control circuit 20.
The input signal may be A/D converted and compared with a predetermined value.

If vibration is detected in step S20, the process advances to step S22, where an information recording frequency counter n is incremented, and then, in step S23, it is determined whether the information recording frequency n is equal to or greater than a predetermined number N.

If the number of times n of redoing information recording reaches the predetermined number N, the process advances to step 826; otherwise, the process advances to step S24. In step S24, a warning (1) is displayed on the display 19 indicating that the information recording will be restarted because vibration was detected during the information recording.
At the same time, a buzzer (not shown) is sounded for 5 predetermined periods of time. After that, in step S25, the motor M is reversed to rewind the film 4 by one frame, and then the process returns to step S13. In the same way as above, the camera advances one frame and records the photographic information again.

When step S23 is affirmative, that is, when information recording is repeated a predetermined number of times and vibrations at a level that interferes with information recording are detected each time, the recorded information is stored in the memory 20m at step S26. Then step S
At step 27, a warning (2) is displayed on the display 19 to the effect that the information recording is to be stopped because vibrations are detected each time even if the information recording is repeated N times, and a buzzer is sounded for a predetermined period of time.

After completing the above processing, return to the main program.

As explained above, when vibration of the camera 1 is detected during information recording, a warning is displayed on the display 19 and the information recording for that photographed frame is re-recorded, which improves the reliability of information recording. do.

Furthermore, even if information is rerecorded a predetermined number of times, each time vibration is detected, the shooting information is recorded in a memory other than the film, so it can be used to prevent vibrations that occur accidentally due to camera shake, etc. It is reasonable to solve the problem by re-recording the information. Further, even if vibrations occur due to a failure inside the camera, the photographic information stored in the memory can be reproduced and used after photographing is completed, and the photographic information will not be lost.

Further, the vibration detector 11 shown in FIGS. 3 to 5 described above directly detects the vibration of the support member 28 of the magnetic Δ and the rad 8, so that the vibration can be reliably detected.

In the above embodiment, even if the re-recording operation is performed a predetermined number of times, if vibrations exceeding a predetermined value are detected each time, the photographing information is stored in the memory 20m. It doesn't matter what the medium is. for example,
An IC memory card may be attached to the cartridge 2 to record information, or a magnetic card or a magnetic disk may be attached to the camera to record information.

Furthermore, in the above embodiment, when vibration was detected during information recording, the information was re-recorded when forwarding one frame after rewinding one frame, but the re-recording operation was not performed while rewinding one frame. Alternatively, the re-recording operation may be performed again when the film cartridge is rewound after all frames have been photographed.

Further, in the above embodiment, a case has been described in which photographic information is recorded on a magnetic track on a film. The present invention can be applied to any device that records information in synchronization with the film being fed.

Furthermore, in the above embodiments, the so-called normal wind camera is used as an example, in which exposure and information recording are performed while winding the film from the film cartridge using the camera's winding Lisbourg. Pull out all the
The present invention can also be applied to a prewind type camera that performs exposure while rewinding the cartridge.

In the configuration of the above embodiment, the film feeding motor M and the motor wear circuit 13 operate the film feeding means 100.
The recording circuit 17 and the magnetic head 8 form the first recording means 10
2, the vibration detector 11 constitutes the vibration detection means 103, the control circuit 20 constitutes the control means 104A to 104D and the second recording means 106, and the memory 20m constitutes the recording medium 105 other than film.

As described in detail of the G0 invention, according to the present invention, when the vibration detected by the vibration detection means exceeds a predetermined value while the first recording means is recording information on the film, a warning signal is output. Therefore, it is possible to confirm that there is a possibility that information was not reliably recorded on the film, and the reliability of information recording is improved.

Further, in claim 2, when the vibration of the camera exceeds a predetermined value during information recording, the film is rewound to the information recording start position and then the film is fed again, during which time the information is re-recorded. Therefore, even if information recording may have failed due to accidental vibrations such as camera shake by the photographer, a re-recording operation can be performed to reliably record information on the film.

In claim 3, when the vibration of the camera exceeds a predetermined value during information recording, the second recording means records the information on a recording medium other than film, so that the photographic information is not lost and necessary information is not lost. Information can be read from the recording medium on which information is recorded and used at any time.

Furthermore, in claim 4, when the operation of re-recording information on the film is performed a predetermined number of times, the information is recorded on a recording medium other than the film by the second recording means, so that if the vibration is caused by a malfunction of the camera itself, the information is recorded on a recording medium other than the film. However, you can record shooting information.

Furthermore, since the vibration detecting means of the fifth aspect detects the vibration of the mounting member to which the recording head of the first recording means is attached, it is possible to reliably detect the vibration f11.

[Brief explanation of the drawing]

FIGS. 1(a) to 1(d) are complaint correspondence diagrams. Fig. 2 is a block diagram showing the overall configuration of one embodiment, Fig. 3(a) is a rear vertical sectional view of the camera showing the first embodiment of the vibration detector, and Fig. 3(b) is its circuit diagram. , FIG. 4(a) is a rear vertical sectional view of the camera showing the second embodiment of the vibration detector, FIG. 4(b) is its circuit diagram, and FIG. 5(a) is the third embodiment of the vibration detector. 51st rear vertical sectional view of the camera showing the embodiment of
1Z (b) is its circuit diagram, FIG. 6 is a flowchart showing the information recording control main program, FIG. 7 is a flowchart showing the shutter release subroutine, and FIG. 8 is a perspective view showing a camera equipped with a conventional information recording device. , FIG. 9 is a diagram showing vibrations measured when the film is advanced one frame. 4.101: Film 7: Magnetic track 8: Magnetic head 11, IIA
~11C: Vibration detector 17: Recording circuit 20: Control circuit 20a: Vibration detection signal input terminal 20m: Memory 28: Support member 29: Vibration detection switch 31: Coil 32. 36: Amplifier
35: Acceleration detector 33. 37: Comparator 100: Film feeding means 102: First recording means 103: Vibration detection means 104
A to 104D: Control circuit

Claims (1)

[Scope of Claims] 1) a first recording means for recording various information on the film as the film is fed by the film feeding means; a vibration detection means for detecting vibration of the camera; 1. An information recording device for a camera, comprising: control means for outputting a warning signal when vibration detected by the vibration detection means exceeds a predetermined value while information is being recorded by the recording means. 2) In the camera information recording device according to claim 1, when the vibration of the camera exceeds a predetermined value during the information recording, the control means rewinds the film to the information recording start position and then rewinds the film to the information recording start position. feeding the film;
An information recording device for a camera, characterized in that the film feeding means and the first recording means are controlled so as to record the information on the film again during that time. 3) The information recording device for a camera according to claim 1, further comprising: a second recording medium for recording the information on a recording medium other than the film;
A camera comprising a recording means, wherein the control means causes the second recording means to record the information on a recording medium other than the film when vibration of the camera exceeds a predetermined value during recording of the information. information recording device. 4) The information recording device for a camera according to claim 2, further comprising: a second recording medium for recording the information on a recording medium other than the film;
A camera comprising a recording means, wherein the control means causes the second recording means to record the information on a recording medium other than the film when the re-recording operation of the information is performed a predetermined number of times. information recording device. 5) The information recording device for a camera according to any one of claims 1 to 4, wherein the vibration detection means detects vibration of a mounting member to which a recording head of the first recording means is attached. Information recording device.