JP3221815B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera provided with magnetic reproducing means for reproducing magnetic information recorded on a magnetic recording section provided on a film.

[0002]

2. Description of the Related Art In recent years, various cameras having a function of recording magnetic information on a magnetic recording portion provided on a film and reproducing the recorded magnetic information have been proposed.

Japanese Patent Laid-Open No. 5-134308 discloses a camera of this type in which the operation of an actuator, which is a noise source, is prohibited during reproduction in order to stably reproduce recorded magnetic information. It has been proposed.

[0004]

However, in the conventional example of JP-A-5-134308, the operation of a built-in strobe device or an external device, for example, an external strobe device during reproduction of magnetic information is prohibited. Nothing was disclosed. Therefore, the strobe device starts the charging operation during the reproduction of the magnetic information, and the noise generated at this time is superimposed on the reproduction signal, so that there is a problem that accurate reproduction of the magnetic information cannot be performed. Was.

(Object of the Invention) It is an object of the present invention to provide a camera capable of obtaining a stable magnetic reproduction signal without noise.

[0006]

According to one aspect of the present invention, there is provided an exposure status display unit for displaying whether a film stored in a film cartridge has been exposed or not exposed. Detection means for detecting the state displayed in the image, and a magnetic recording unit provided on the film for each photographing.
In a camera provided with a magnetic recording / reproducing means for recording magnetic information and also having a reproducing function for reproducing magnetic information recorded in the magnetic recording section, and a strobe device, the detecting means detects that the partial exposure has been completed. When the frame is detected, the film feeding control is performed so that a frame that can be determined as unexposed is aligned with a photographable position .
Magnetic information is reproduced , a digital signal as the magnetic information is detected, and when the detecting means detects that the partial exposure has been completed, the charging operation of the strobe device is performed by the magnetic recording / reproducing means. Providing an operation prohibiting means for prohibiting during reproduction of information , wherein the magnetic recording and reproducing means
Only during the reproduction operation of the recording operation and the reproduction operation
The charging operation of the strobe device is prohibited .

[0007] To achieve the above object, the present invention according to claim 2 is provided in a film cartridge.
Exposure that indicates whether the exposed film is exposed or unexposed.
Detecting means for detecting a state displayed on the light state display unit;
Magnetic information is stored in the magnetic recording unit provided on the film for each shot.
And the magnetic information recorded in the magnetic recording unit.
Magnetic recording / reproducing means also having a reproducing function of reproducing magnetic information
And communication means for communicating with an external flash unit.
In the camera obtained above, the detection means has already partially exposed.
Is detected, film feed control is performed and
Set the frame that can be separated to the position where you can shoot,
The magnetic information is reproduced by the magnetic recording / reproducing means.
Digital signal, which is
When the detecting means detects that the partial exposure has been completed,
Charging operation of the external strobe device via the communication means
Is prohibited during reproduction of magnetic information by the magnetic recording / reproducing means.
Operation inhibiting means for performing the operation of the magnetic recording / reproducing means.
Only during the reproduction operation of the recording operation and the reproduction operation
The charging operation of the strobe device is prohibited .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIGS. 1 to 6 are views showing a camera according to a first embodiment of the present invention, and FIG. 1 is a perspective view showing a main part of the camera.

In FIG. 1, 1 is a film, 2 (2
a, 2b, 2c ...) are perforations provided on the film 1, 3 is a magnetic recording section provided on the film 1,
Is a film cartridge, 5 is a film cartridge 4
Movable opening / closing drive unit. Reference numeral 6 denotes a film exposure state display section for displaying whether the film 1 stored in the film cartridge 4 is "exposed" or "unexposed", and displays the black and white pattern. Reference numeral 7 denotes a movable light shielding window of the film cartridge 4, which is driven by the movable light shielding window opening / closing drive unit 5 to open and close. Reference numeral 8 denotes a spool shaft of the film cartridge 4. When the spool shaft 8 rotates in a direction to rewind the film 1 to the film cartridge 4, the film 1 is wound into the film cartridge 4. Reference numeral 9 denotes a display window of the film cartridge 4 through which the state of the film exposure state display section 6 is detected by detecting means described later.

Reference numeral 10 denotes a magnetic head for recording and reproducing information on the magnetic recording unit 3 provided on the film 1. 11
Is a pad which is arranged opposite to the magnetic head 10 and sandwiches the film 1 with a predetermined force. The force generated by the pad 11 and the magnetic head 10 transfers the magnetic head 10 to the magnetic recording section 3 on the film 1. We adhere. 12,13
Denotes a photo reflector, and a film exposure state display unit 6
And means for detecting film information. Reference numeral 15 denotes a movable light shielding window opening / closing member, which opens and closes the movable light shielding window 7 via the movable light shielding window opening / closing drive unit 5 by this rotation. 1
Reference numeral 6 denotes a joint on the movable light shielding window opening / closing member 15 to the movable light shielding window opening / closing drive unit 5. 17 is a movable light shielding window opening / closing member 1
5, the movable light shielding window opening / closing detection switches 18 and 19 are turned on by rotation of the movable light shielding window opening / closing member 15,
A non-conducting state is established (here, when the movable light blocking window 7 is opened, the conductive state is established). Reference numeral 20 denotes a gear unit, which controls the driving force of the movable light shielding window opening / closing motor 21 by the gear 2.
The movable light-shielding window opening / closing member 15 is driven via 2. 23,
24 is a film cartridge presence / absence detection switch,
When the film cartridge 4 is inserted into a cartridge chamber (not shown) in the camera body, the film cartridge 4 becomes conductive.

Reference numeral 25 denotes a feeding joint member, by which the film 1 can be pushed out of the film cartridge 4 or rewound by this rotation. Reference numeral 26 denotes a gear unit, which transmits a driving force of a film feeding motor 27 to a feeding joint member 25 and a film winding member (not shown) via a gear 28. Reference numerals 29 and 30 denote photoreflectors for detecting perforations (2a, 2b, 2c...) Provided on the film 1.

In the above configuration, when the film is wound, the driving force of the film feeding motor 27 is transmitted to the feeding joining member 25 and the film winding member (not shown) via the gear unit 26, and the film is fed. The composite member 25 is the film 1
Is rotated in a direction to push out the film 1 from the inside of the film cartridge 4, and a film winding member (not shown) rotates in a direction for winding the film 1. As a result, the film 1 is extruded from the inside of the film cartridge 4 and wound around a film winding member (not shown), and thereafter, the winding force of the film winding member is generated by the feeding joint member 25. When the force becomes dominant, the planetary gears in the gear unit 26 are disengaged, and the driving force of the feeding joint member 25 is lost. Therefore, the feeding load of the film feeding motor 27 during film winding can be reduced.

When the film 1 is rewound, the film feed motor 27 rotates in the reverse direction, and the feed splicing member 25 rotates in the direction in which the film 1 is wound into the film cartridge 4, thereby turning the film 1 into a film. It can be wound into the cartridge 4.

Next, the operation of the photoreflectors 29 and 30 during film feeding will be described.

When the film 1 moves and the perforation 2 (for example, 2a) passes in front of the photoreflector 29, a pulse signal is generated in the photoreflector 29, and the rising and falling of the pulse signal (starting edge of the perforation 2a) And an end edge), a signal of a recording frequency corresponding to the moving speed of the film 1 is applied to the magnetic head 10 to perform magnetic recording. Next, a perforation 2 (2b) is provided in front of the photo reflector 30.
Passes, and a pulse signal is generated in the photoreflector 30. The control circuit, which will be described later, energizes the film feeding motor 27 in a time-sharing manner, and the film 1 is decelerated so as to be easily stopped. Then, when the next perforation 2 (2c) passes through the position of the photoreflector 29, the electrodes at both ends of the film feed motor 27 are set to the GND potential at this moment, the brake is applied, and the film 1 is stopped. You.

FIG. 2 is a diagram showing a state in which magnetic information is recorded on the film 1 by the magnetic head 10.

In FIG. 2, reference numerals 14a to 14e denote exposed portions on the film 1, and reference numerals 14a to 14c denote exposed frames.
4d to 14e indicate unexposed frames, respectively. Other parts are as described above.

FIG. 3 is a block diagram showing the electrical configuration of the above-mentioned camera, and the same parts as those in FIG. 1 are denoted by the same reference numerals.

In FIG. 3, 31 is a control circuit, 32 is an auto focus control (AE), and an automatic exposure amount control (A
E), other control circuits such as shutter control (SH), 33
Is a display unit such as an LCD, 34 is a sounding body, 35 and 36 are motors 21 for opening and closing the movable light shielding window, and a motor 2 for feeding the film.
A driver circuit for driving the magnetic head 10;
Is a magnetic recording / reproducing unit for recording information by reproducing the information or reproducing the information. Reference numeral 38 denotes a built-in flash device that performs a charging operation and a light emitting operation in accordance with a signal from the control circuit 31.

SW1 is a switch that is turned on by a first stroke of a release button (not shown), SW2 is a switch that is turned on by a second stroke of a release button (not shown), and SW3 is a rewind used for rewinding a film in the middle. Switch. SW4 is a movable light-shielding window open / close detection switch corresponding to the movable light-shielding window open / close detection switches 18 and 19, SW5 is a film cartridge presence / absence detection switch corresponding to the film cartridge presence / absence detection switches 23 and 24, and SW6 is a cartridge chamber lid closed. It is a detection switch.

Next, the camera having the above configuration (control circuit 31)
Will be described with reference to the flowchart of FIG.

In the flow of FIG. 4, the film exposure state display section 6 is set to an EI (Exposuer Indicator), and the fact that the display state is "all frames exposed" is indicated by E (Expose Exposure Indicator).
d), “Developed” is abbreviated as Pr (Processed), “Partially exposed” is abbreviated as Pa (Partially exposed), and “Unexposed” is abbreviated as F (Flesh). . Further, the movable light shielding window 7 is abbreviated as LL (Light Look).

When the camera is powered on, step S
In step S102 via the control unit 101, it is determined whether or not the cartridge chamber lid is closed.
Detected from the state of W6. If the cartridge chamber lid is open, stay at this step. Thereafter, the process proceeds to step S103 by detecting the closing of the cartridge chamber lid, and here, the film cartridge presence / absence detection switch S
The presence or absence of the film cartridge 4 is detected from the state of W5. If the film cartridge 4 has not been loaded, the process returns to step S102, and the same operation is repeated. If the film cartridge 4 is loaded, step S
Proceed to 104.

In step S104, the motor 21 for opening and closing the movable light shielding window is driven by the driver circuit 35, and the film cartridge 4 is opened via the movable light shielding window opening and closing member 15.
Is rotated, and the opening operation of the movable light shielding window 7 is started. When the movable light shielding window opening / closing detection switch SW4 is turned on, the movable light shielding window opening / closing motor 21 is stopped. As a result, the movable light shielding window 7 opens, and the spool shaft 8 of the film cartridge 4 can be rotated. Therefore, this time, the control circuit 31
The film feed motor 27 is driven by 6 to rotate the feed splicing member 25 to start extruding the film 1 from the inside of the film cartridge 4.

In the next step S105, the film exposure state display section 6 rotates in synchronization with the film feeding, and various kinds of information recorded in a black and white pattern on its surface, that is, a film defining frame which can be exposed. The film information such as the number, film sensitivity (ISO), and film type is read by the photoreflectors 12 and 13. At this time, the state of the film exposure state display section 6 is also read.

In step S106, the state of the film exposure state display section 6 read by the photo reflectors 12, 13 is determined. As a result, if it is determined that the film is fully exposed, that is, “all frames are exposed” or “developed”, the process proceeds to step S119,
If "unexposed" is detected, step S1
07, and if it is detected that "partially exposed", the flow proceeds to step S120.

First, the operation in the case where it is determined that the exposure has not been performed and the process proceeds to step S107 will be described.

In steps S107 to S109, the film feed motor 27 is driven by the driver circuit 36 to start pushing out the film 1 from the film cartridge 4, and the perforation 2 is detected in the feed of the film. While monitoring the output signals of the photoreflectors 29 and 30, the value of the number of frames K to be photographed is set to "0", and when the first frame (frame) of the film 1 reaches a photographable position, the film feeding motor 27 is turned off. Is stopped, and the number of photographed frames is set to "1".

In the next step S110, it is detected whether or not a release button (not shown) has been pressed and the switch SW1 has been turned on. If the switch SW1 has not been turned on, the process remains in this step until it is turned on. Thereafter, when the switch SW1 is turned on, the process proceeds to step S111, in which the control circuit 32 performs known photometry and ranging operations, and performs autofocus control based on the obtained ranging information.

In the next step S112, the release button is further pressed and the switch SW2 is turned on.
It is detected whether or not the operation has been performed, and if it has not been turned on, the process returns to step S111 to repeat the same operation. Thereafter, when the switch SW2 is turned on, the process proceeds to step S113, and the control circuit 32 again controls the opening and closing of the shutter based on the photometric information obtained by the photometric operation described above. Then, in step S114, the film feed motor 27 is driven via the driver circuit 36 to drive the film 1
Perform the winding of the piece. At this time, the recording frequency is determined based on the output of the photoreflector 29 for detecting perforation, and the magnetic head 10 is driven to record the photographing information such as the date and shutter speed on the magnetic recording unit 3 provided on the film 1. Do.

Next, in step S115, the state of the halfway take-out switch SW3 is checked, and if it is ON, step S126 is executed in order to take out the film halfway.
Then, the film feeding motor 27 is reversed through the driver circuit 36 to start rewinding the film, and the signal is not generated from the perforation detecting photo reflector 29. Stop driving. Then, the next step S127
After a certain period of time after the signal is no longer generated from the photoreflector 29 for detecting perforation, the film feeding motor 27 is turned off by the photoreflector 12,
Drive control is again performed according to the signal of 13, and the rotational position of the film exposure state display section 6 is adjusted to the "partially exposed" state.

Next, in step S128, the movable light shielding window opening / closing motor 21 is driven via the driver circuit 35 to close the movable light shielding window 7, and in the next step S129, a display indicating that the film cartridge can be taken out is displayed on the display unit 3.
Perform 3 Then, a series of operations ends in step S130.

If the intermediate take-out switch SW3 is OFF in step S115, the process proceeds to step S116, where it is checked whether or not the number K of photographed frames has reached the prescribed number of frames (final frame). If not, the process returns to step S109, and the value of the number K of photographed frames is set to “+”.
1 ". Then, the operation after step S110 is performed.

Thereafter, when it is detected in step S116 that the number K of shot frames has reached the specified number of frames,
Proceeding to step S117, the film feeding motor 27 is reversed through the driver circuit 36 to start rewinding the film, and the signal is no longer generated from the perforation detecting photoreflector 29. The driving of the motor 27 is stopped. Then, in the next step S118, after a certain period of time after the signal is no longer generated from the photoreflector 29 for detecting perforation, the film feed motor 27 is again driven and controlled according to the signals from the photoreflectors 12 and 13,
The rotation position of the film exposure state display section 6 is adjusted to the state of "exposed".

Thereafter, the process proceeds to step S128, in which the movable light shielding window opening / closing motor 21 is driven via the driver circuit 35 to close the movable light shielding window 7, and the next step S1 is performed.
At 29, a display indicating that the film cartridge can be taken out is displayed on the display section 33, and a series of operations is ended at step S130.

Next, a case will be described in which it is detected in step S106 that the state of the film exposure state display section 6 is "exposed" or "developed".

In this case, the position of the film exposure state display section 6 may change due to rotation of the spool shaft 8,
In the case where the exposure has been completed, the movable light-blocking window 7 is exposed in the open state, so that the steps S106 to S119 are performed.
Then, the film feeding motor 27 is driven and controlled according to the output signals of the photoreflectors 12 and 13 to adjust the film exposure state display section 6 to the original state. Then, the process proceeds to step S128, in which the movable light shielding window opening / closing motor 21 is driven via the driver circuit 35 to close the movable light shielding window 7, and in the next step S129, a display indicating that the film cartridge can be taken out is displayed on the display unit 33. Do, step S
At 130, a series of operations ends.

Next, the case where it is detected in step S106 that the state of the film exposure state display section 6 is "partially exposed" will be described.

In this case, the process proceeds from step S106 to step S120, in which the charging operation and the light emitting operation of the built-in strobe device are prohibited so that no noise is generated. Thereafter, the process proceeds to step S121, in which the film feed motor 27 is driven by the driver circuit 36, and the feed joint member 25 is rotated to start pushing the film 1 out of the film cartridge 4.

Then, in the next step S122,
A film exposure state display unit 6 linked with the film feeding
Is rotated, and various information (information such as the number of frames which can be exposed, the film sensitivity, the film type, etc.) recorded on the surface in a black and white pattern is
Read by 13. Next, in step S123, the film feeding motor 27 is driven to control the feeding of the film 1, and the K frame is adjusted to a position where photographing is possible. At this time, the digital signal which is magnetic recording information is detected up to the K-1 frame. If the digital signal cannot be detected in the K frame, the film 1 is rewound and the digital signal of the K-1 frame is detected again. If the digital signal is detected again in the K-1 frame, the magnetic head 1
Since it is considered that there is no dust on the K frame, the K frame can be determined to be “unexposed”, so that the K frame is set to a position where photography can be performed as described above.

Next, at step 124, a display indicating the completion of the resetting of the halfway taken-out film cartridge is made on the display section 33. Then, the process proceeds to step S125, in which the operation prohibition of the built-in flash device 38 performed in step S120 is released, and the process proceeds to step S110 to enter a standby state of the switch SW1.

According to the first embodiment, when the magnetic information is reproduced from the magnetic recording section 3 of the film 1, the operation (charging operation or light emitting operation) of the built-in strobe device 38 is prohibited. Therefore, noise generated by this operation is not superimposed as noise of the reproduction signal, and an accurate magnetic reproduction signal can always be obtained.

(Second Embodiment) FIG. 5 is a block diagram showing the configuration of a camera according to a second embodiment of the present invention. The same parts as those in FIG. 3 are denoted by the same reference numerals.

In FIG. 3, a camera equipped with the built-in flash device 38 is assumed. However, in this embodiment, the camera does not have the built-in flash device, or is equipped with an external flash device even if it has the built-in flash device. In this case, it is assumed that a camera of a type that preferentially uses the device or a camera whose lens is interchangeable is used.

In FIG. 5, reference numeral 39 denotes communication means for communicating with an external device connected to the camera, 40 denotes a lens,
External devices such as an external strobe device, data bag, and remote control device.

FIG. 6 is a flow chart showing the operation in the second embodiment of the present invention. Portions for executing the same operations as those in FIG. 4 are assigned the same step numbers, and are different from the first embodiment. Only the operation part will be described.

In step S 106 of FIG. 6, when it is detected that the state of the film exposure state display unit 6 is “partially exposed”, the process proceeds from step S 106 to step S 200, and the external device is connected via the communication unit 39. Operation is prohibited. Specifically, operations such as lens focus adjustment control, focal length adjustment control, and aperture drive control, the operation of the reception circuit of the remote control device, the charging and light emission operations of the external flash device, and the projection of the data bag. Light operation is prohibited.

Thereafter, the flow advances to step S121, in which the film feed motor 27 is driven by the driver circuit 36, and the feed splicing member 25 is rotated so that the film cartridge 4
Extrusion of the film 1 is started from the inside. Then, in the next step S122, the film exposure state display section 6 is rotated in conjunction with the film feeding. Information such as sensitivity and film type) is read by the photoreflectors 12 and 13.
Next, in step S123, the film feeding motor 27 is driven to control the feeding of the film 1, and the K frame is adjusted to a position where photographing is possible. At this time, digital signals as magnetic recording information are detected up to K-1 frames,
If the digital signal cannot be detected in the frame, the film 1 is rewound and the digital signal of the K-1 frame is detected again. If the digital signal is detected again in the K-1 frame, the K frame can be determined to be "unexposed" since there is no dust attached to the magnetic head 10, so that the K frame can be photographed as described above. Position. Next, at step 124, the display unit 33 displays an indication that the resetting of the halfway ejection film cartridge is completed.

Then, the process proceeds to step S225, in which the prohibition of various operations of the external device 40 performed in step S200 is released, and the process proceeds to step S110 to enter a state of waiting for the switch SW1 to be turned on.

According to the second embodiment, when the magnetic information is reproduced from the magnetic recording section 3 of the film 1, the operation of the external device 40, that is, the focus adjustment control of the lens, the focal length adjustment control, and the aperture stop. Operations such as drive control, the operation of the receiving circuit of the remote control device, the charging and light-emitting operations of the external strobe device, and the operation of projecting the data back are prohibited. The generated noise is not superimposed as the noise of the reproduction signal, and an accurate magnetic reproduction signal can always be obtained.

(Correspondence between Invention and Embodiment) In this embodiment, the magnetic head 10 and the magnetic recording / reproducing section 37 correspond to the magnetic reproducing means of the present invention, and the control circuit 31 corresponds to the operation inhibiting means of the present invention.

The correspondence between the components of the embodiments and the components of the present invention has been described above. However, the present invention is not limited to the configurations of the embodiments, and the functions described in the claims or the components of the embodiments are not limited thereto. Needless to say, any configuration may be used as long as the function of the device can be achieved.

[0054]

As described above, according to the present invention, it is possible to obtain a stable magnetic reproduction signal without noise.
it can.

[0055]

[0056]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a state in which magnetic information is recorded on a film by a magnetic head in the camera of FIG. 1;

FIG. 3 is a block diagram showing an electrical configuration of the camera shown in FIG.

FIG. 4 is a flowchart illustrating an operation of the camera of FIG. 1;

FIG. 5 is a block diagram illustrating a circuit configuration of a camera according to a second embodiment of the present invention.

6 is a flowchart showing the operation of the camera shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film 2 Perforation 3 Magnetic recording part 4 Film cartridge 10 Magnetic head 31 Control circuit 37 Magnetic recording / reproducing part 38 Built-in strobe device 40 External device

Continuation of the front page (56) References JP-A-4-304438 (JP, A) JP-A-7-64145 (JP, A) JP-A-5-40299 (JP, A) JP-A-5-134308 (JP , A) Actually open 60-60535 (JP, U)

Claims (2)

(57) [Claims] 1. A detecting means for detecting a state displayed on an exposure state display unit for displaying a state such as whether a film stored in a film cartridge has been exposed or not , and
The magnetic information is recorded on the magnetic recording unit provided on the film
Rutotomoni, a magnetic recording and reproducing means also has playback function for reproducing magnetic information recorded on the magnetic recording unit, in a camera and a flash device, when it is detected that a partial exposed by said detecting means, combined frames that can be judged unexposed performing film feeding control position that allows imaging, the magnetic recording and reproducing means in the
And reproduces magnetic information, and detects a digital signal as the magnetic information. Further, when the detecting means detects that partial exposure has been completed, the charging operation of the strobe device is performed by the magnetic recording / reproducing means. An operation inhibiting means for inhibiting during the reproduction of information is provided , and the recording operation and the reproducing operation of the magnetic recording / reproducing means are performed.
Of the flash device only during the playback operation
A camera characterized by prohibiting electrical operation . 2. A filter housed in a film cartridge.
Exposure status table that indicates whether the LUM is exposed or unexposed
Detection means for detecting the state displayed on the display unit, and
The magnetic information is recorded on the magnetic recording unit provided on the film
And the magnetic information recorded in the magnetic recording unit
Magnetic recording / reproducing means also having a reproducing function for reproducing, and an external
Camera having communication means for communicating with a strobe device
In the above, when the detecting means detects that the partial exposure has been completed,
Take a frame that can be determined as unexposed by performing
The magnetic recording / reproducing means
And reproduces magnetic information by using the digital information.
Signal, and further, the detection means has detected that partial exposure has been completed.
When charging the external strobe device via the communication means
During the operation of reproducing the magnetic information by the magnetic recording / reproducing means,
Prohibiting means for prohibiting the operation of the magnetic recording / reproducing means.
During the reproducing operation of the recording operation and the reproducing operation
Characterized that you stop charging of the flash device only
And the camera.