JPH10232441A - Magnetic recording camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic recording camera capable of always accurately performing magnetic information recording even when failure occurs in moving film. SOLUTION: Whether or not a 1st perforation detecting means 6, a 2nd perforation detecting means 7 and a film moving amount detecting means 8 outputting the moving amount of the film as a pulse signal are normally actuated is decided. In the case of deciding that at least either the means 6 or the means 8 is not normally actuated, the actuation of a magnetic recording means 9 is stopped and also the feeding of the film is stopped based on output from the means 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a magnetic recording camera,
More specifically, the present invention relates to a magnetic recording camera capable of performing magnetic recording on a magnetic recording unit provided on a film.

[0002]

2. Description of the Related Art Conventionally, a magnetic recording section separate from an exposure section is provided on a photographic film, and photographic information such as date and time of photography and exposure data at the time of photography can be magnetically recorded on the magnetic recording section. Films are known. Then, in order to secure as many magnetic recording areas as possible on a film having such a magnetic recording unit, for example, as shown in FIG.
A large number of films having two perforations per frame, which is the minimum necessary for feeding control, are disclosed. Also, many magnetic recording devices for cameras using a film provided with two perforations per one frame have been disclosed.

[0003] The applicant of the present invention has previously disclosed Japanese Patent Application No. 7-267.
No. 042 proposes the following technical means.
In other words, the present invention relates to a magnetic recording device for a camera using a film provided with two perforations per frame as described above, which is provided so as to be in contact with the film surface, and rotates as the film moves by feeding control. A film moving amount detecting means for outputting a pulse signal every time the film moves by a predetermined amount, and a time measuring means for measuring a time width of the pulse signal outputted from the film moving amount detecting means, and After that, when a predetermined number of pulse signals output from the film moving amount detecting means are detected, a technical means for starting magnetic recording by a PPM recording method described later is proposed.

In this technical means, the magnetic recording frequency at the time of performing magnetic recording is a frequency corresponding to the time width of the pulse signal output from the film moving amount detecting means, and is recorded every time the pulse signal is detected. While updating the frequency,
A predetermined number of predetermined data is recorded.

Here, the PPM recording method will be briefly described with reference to FIG.

In this PPM recording method, data "0" and data "1" are determined based on the falling (or rising) position in the signal waveform of the data bit. Specifically, as shown in FIG.
The case where the signal falls (or rises) in the time from the beginning to half of the data in t is data "0".
After the same half of the time, the signal falls (or
The case where there is a rising edge is defined as data "1". In this way, by defining "0" and "1", even if the falling (or rising) position of the signal is slightly shifted due to, for example, slight feeding unevenness during feeding, data "0" and The data "1" can be distinguished.

[0007]

However, in the magnetic recording camera device proposed in the above-mentioned Japanese Patent Application Laid-Open No. Hei 7-267042, a film moving amount detecting means is used.
A film passive roller is used which rotates in accordance with the movement of the film in contact with the film surface and outputs a pulse signal every time the film moves by a predetermined amount. And the number of pulses may be shifted.

Therefore, in this case, the start position of the magnetic recording may be shifted, and the magnetic recording may be performed outside the recording area.
There is a possibility that the recording data may not be used effectively at the time of printing at a developing laboratory or the like.

Further, since the film driven roller rotates utilizing the frictional force with the film surface and detects the amount of movement of the film, the frictional force becomes small due to an environmental change such as temperature, and the film driven roller slips. There is a possibility that the film feeding speed cannot be detected without rotation.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a magnetic recording camera that can always accurately record magnetic information even when a problem occurs in film movement.

[0011]

In order to achieve the above object, a first magnetic recording camera of the present invention is a magnetic recording camera capable of performing magnetic recording on a magnetic recording section provided on a film. A perforation detection means for detecting perforation provided in the apparatus, a pulse signal output means for outputting a movement amount of the film as a pulse signal by rotating in conjunction with the movement of the film, and a pulse signal output means. Based on the output,
Pulse signal width detection means for detecting a width of a pulse signal; magnetic recording frequency determination means for determining a magnetic recording frequency when magnetic recording is performed on the film based on an output from the pulse signal width detection means; Magnetic recording control means for starting magnetic recording at the magnetic recording frequency determined by the magnetic recording frequency means based on the output from the means.

[0012] To achieve the above object, a second aspect of the present invention is provided.
Is a magnetic recording camera capable of performing magnetic recording on a magnetic recording section provided on a film, wherein a perforation detecting means for detecting perforation provided on the film and interlocking with the movement of the film Pulse signal output means for outputting the amount of movement of the film as a pulse signal by rotating the film, a time measuring means for measuring the time during which the perforation detecting means is detecting a predetermined perforation, and a pulse signal output means. Determining means for determining whether the means is operating normally, and based on the output from the timing means,
Magnetic recording frequency determining means for determining a magnetic recording frequency when magnetically recording on the film; and a magnetic recording frequency determined by the magnetic recording frequency means when it is determined that the pulse signal output means is not operating normally. Magnetic recording control means for starting magnetic recording at the recording frequency.

[0013] In order to achieve the above object, a third aspect of the present invention is provided.
The magnetic recording camera is a magnetic recording camera capable of performing magnetic recording on a magnetic recording unit provided on a film, provided in an aperture corresponding to a shooting frame,
A first perforation detecting means for detecting perforation provided on the film; and a perforation provided on the film, the first perforation detecting means being arranged at a predetermined distance from the first perforation detecting means in an aperture corresponding to a photographing frame. A second perforation detecting means for detecting, a magnetic recording frequency determining means for determining a magnetic recording frequency when magnetically recording on the film based on an output from the first perforation detecting means, and a first perforation detecting means. Magnetic recording control means for starting magnetic recording at the magnetic recording frequency on the basis of a predetermined output of the film, and a pulse for outputting the amount of movement of the film as a pulse signal by rotating in conjunction with the movement of the film. Signal output means, and the first perforator Operation judging means for judging whether the operation detection means and the pulse signal output means are operating normally, and the first perforation detection means and the pulse signal output means based on the judgment result of the operation judgment means. When at least one of the means is not operating normally, stopping the operation of the magnetic recording control means and stopping the feeding of the film based on the output from the second perforation detecting means. Control means.

The first magnetic recording camera detects the perforation provided on the film by the perforation detecting means, and rotates by the pulse signal output means in conjunction with the movement of the film, thereby moving the film. The amount is output as a pulse signal. Further, based on the output from the pulse signal width detecting means for detecting the width of the pulse signal based on the output from the pulse signal output means, the magnetic recording frequency for magnetic recording on the film is determined by the magnetic recording frequency determining means. decide. Further, based on the output from the perforation detecting means, the magnetic recording is started by the magnetic recording control means at the magnetic recording frequency determined by the magnetic recording frequency means.

In the second magnetic recording camera, the perforation detecting means detects the perforation provided on the film, and the pulse signal output means rotates in conjunction with the movement of the film, thereby moving the film. The amount is output as a pulse signal. Further, the perforation detecting means measures the time during which a predetermined perforation is detected by the time measuring means, and the determining means determines whether or not the pulse signal output means is operating normally. Further, a magnetic recording frequency for magnetic recording on the film is determined by a magnetic recording frequency determining means based on an output from the time measuring means. When it is determined that the pulse signal output means is not operating normally, the magnetic recording control means starts magnetic recording at the magnetic recording frequency determined by the magnetic recording frequency means.

In the third magnetic recording camera, the first perforation detecting means is provided in an aperture corresponding to a photographing frame and detects a perforation provided on the film, and the second perforation detecting means is a camera for photographing. In the aperture corresponding to the frame, the first perforation detecting means is disposed at a predetermined distance from the first perforation detecting means, and detects the perforation provided on the film. Then, based on the output from the first perforation detecting means, a magnetic recording frequency for magnetic recording on the film is determined by a magnetic recording frequency determining means.
Also, based on a predetermined output from the first perforation detecting means, the magnetic recording control means starts magnetic recording at the magnetic recording frequency. On the other hand, the pulse signal output means outputs the amount of movement of the film as a pulse signal by rotating in conjunction with the movement of the film. Then, the operation determining means determines whether or not the first perforation detecting means and the pulse signal output means are operating normally, and based on the determination result of the operation determining means, the first perforation detecting means When it is determined that at least one of the pulse signal output means and the pulse signal output means is not operating normally, the operation of the magnetic recording control means is stopped, and the film recording is performed based on the output from the second perforation detection means. The feeding is stopped by the stop control means.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, a magnetic recording unit is provided separately from an exposure unit on a film for photographing, and a film for magnetically recording photographing information such as photographing date and time and exposure data at the time of photographing is provided on the magnetic recording unit. It is a usable magnetic recording camera. FIG. 2 is a diagram showing an example of a film used in the magnetic recording camera of the present embodiment. As shown in the figure, the film 1 is characterized in that, for example, two perforations 3 are provided per frame, which is the minimum necessary for feeding control, in order to secure as many magnetic recording areas as possible on the film. And In the drawing, reference numeral 2 denotes a photographing screen, and reference numeral 4 denotes a film cartridge in which the film 1 is loaded.

FIG. 3 is a view showing an example of data recorded in the PPM recording system employed in the magnetic recording camera of the embodiment.

Here, the PPM recording method will be described with reference to FIG.

In this PPM recording method, data “0” and data “1” are determined based on the falling (or rising) position in the signal waveform of the data bit. Specifically, as shown in FIG.
The case where the signal falls (or rises) in the time from the beginning to half of the data in t is data "0".
After the same half of the time, the signal falls (or
The case where there is a rising edge is defined as data "1". That is, in the bits indicated by (1) and (3) in the drawing, since the signal falls during the time from the beginning to the half of the data in one bit, the data is "0", and (2) is , Since the signal falls after half the time, the data is set to "1".

FIG. 1 is a block diagram showing the configuration of a magnetic recording camera according to an embodiment of the present invention.

The magnetic recording camera according to the present embodiment has a CPU (Central Pro) that controls each part of the camera body.
sessing Unit) 5, first perforation detecting means 6 provided in an aperture corresponding to the photographing frame, and detecting perforations provided in the film loaded in the camera body, and also in an aperture corresponding to the photographing frame. A second perforation detecting means 7 disposed at a predetermined distance from the first perforation detecting means 6 for detecting perforation provided on the film; and a film moving amount detecting means 8 for detecting a moving amount of the film. A magnetic recording unit 9 for recording predetermined photographing information as magnetic information on a magnetic recording unit on the film; a timer 10 for counting the time during which the perforation detector detects a predetermined different perforation; Film feed driving means for controlling the feeding The main part is constituted by 11 and signal processing means 12 for processing signals from the first perforation detecting means 6, the second perforation detecting means 7 and the film moving amount detecting means 8.

FIG. 4 is a diagram showing a schematic positional relationship among the first perforation detecting means 6, the second perforation detecting means 7, the magnetic recording means 9, and the film moving amount detecting means 8, and FIG. The first perforation detecting means 6, the second perforation detecting means 7,
4 is a timing chart showing operations of a magnetic recording unit 9 and a film movement amount detecting unit 8;

FIG. 6 is a flowchart showing the main operation of the magnetic recording camera of this embodiment.

Here, the main operation of the magnetic recording camera of this embodiment will be described with reference to the flowchart shown in FIG.

First, it is determined whether or not a cartridge (not shown) has been loaded (step S1).
O), the state is maintained until loaded, and if loaded (YES), the cartridge chamber lid is locked (step S).
2), the cartridge spool rotation lock is released (step S3).

Next, the state of use of the film and, for example, a disc described on a disc provided on a cartridge spool,
The barcode data serving as information about the film is read (step S4), and it is determined whether or not the film of the loaded cartridge has not been exposed (step S5).
If it is determined that the exposure has been completed (NO), the sequence of the present embodiment ends. In the case where the exposure has been completed, the sequence may be ended after the display proceeds to step S15 to be described later.

However, if the film has not been exposed in the determination in step S5 (YES), an automatic loading operation is performed (step S6), and the first photographing frame is set. Here, if the loaded film is a film that has been partially exposed, the film is fed to the first unexposed frame and then set. This may be a feeding method or a display method conventionally proposed. As for the autoloading, various types of autoloading devices have been disclosed, but any type may be used.

Next, when the auto loading is completed, a photographing standby state is set (step S7), and when photographing is performed by pressing the release switch (YES), one frame is wound up in preparation for the next photographing (step S7). S8). Then, it is determined whether or not the shooting of the last frame is completed (step S9). If the shooting is not the last frame (NO), the process returns to step S7, and the shooting standby state is set again.

If it is determined in step S7 that the release switch is not depressed in the photographing standby state (N
O), if the rewind SW is pressed (YES), the process proceeds to the next step S11, and if not (NO),
The process returns to step S7. That is, step S9 and
In step S10, if the winding of one frame after the photographing of the last frame is completed or the rewind SW is pressed, a rewind operation is started to wind the film into the cartridge (step S11), and the film is rewound. It is determined whether or not to end (step S12). If the rewinding is not completed (NO), the rewinding operation is continued, and if the rewinding is completed (YES), the rewinding operation is stopped (step S13).

Next, it is detected whether or not the user of the camera has operated the opening / closing member to open the cartridge chamber lid in order to remove the cartridge (step S14).
If no operation is performed to open the opening / closing member (N
O), maintain the state before the opening / closing member is operated.
However, if the operation is performed (YES), the cartridge spool is rotated to display "exposure completed" on the film use state display section 3 (step S15). In addition, even if it is not displayed that exposure has been completed, any display that can notify the user of exposure completion may be used.

Then, the cartridge spool is locked so as not to rotate (step S16), and the lock of the cartridge chamber lid is released (step S17).

The above is the schematic operation of the magnetic recording camera of the present embodiment.

In this embodiment, the recording of the photographing information such as the photographing date and time is simultaneously performed during the one-frame winding in step S8.

Hereinafter, the magnetic recording operation of the imaging information in the magnetic recording camera according to the present embodiment will be described in detail.

FIG. 4 shows the magnetic recording camera of the present embodiment, in which the first perforation detecting means 6, the second perforation detecting means 7, the film moving amount detecting means 8, the magnetic recording means 9, the film 1 and the photographing screen 2 are displayed. It is a figure showing a schematic arrangement.

FIG. 5 shows the first perforation detecting means 6, the second perforation detecting means 7, the film moving amount detecting means 8, the magnetic recording means 9, the film 1
5 is a timing chart showing the timing of a film single-frame winding operation when the shooting screen 2 has the arrangement shown in FIG. 4.

FIG. 7 is an explanatory diagram showing the structure of the film movement amount detecting means 8 in the magnetic recording camera of the present embodiment.

As shown in FIG. 7, the film moving amount detecting means 8 comes into contact with the film 1 at a lower portion of the photographing screen 2 on the film 1 and rotates around the driven roller shaft 13 in accordance with the movement of the film 1. The driven roller body 14 that moves
The main part is composed of an encoder 16 that rotates together with the driven roller main body 14 and a photo reflector (hereinafter, referred to as JPI) 15. The film movement amount detecting means 8 generates a pulse signal according to the movement amount of the film 1 as the film 1 moves (FIG. 5).
reference).

FIGS. 8 to 12 are flowcharts showing the sequence of winding one frame in the magnetic recording camera of the present embodiment.

Here, FIGS. 4, 5, 7 and 8
The magnetic recording during feeding in the magnetic recording camera of the present embodiment will be described using the flowchart shown in FIG.

In this embodiment, both the first perforation detecting means 6 and the second perforation detecting means 7 use photoreflectors.
The following description will be made on the assumption that the photoreflector of the first perforation detecting means 6 is WPR1 and the photoreflector of the second perforation detecting means 7 is WPR2.

When the WPR1 and WPR2 detect the perforations 3 provided on the film 1, they output an "H" level signal through the signal processing means 12 as shown in FIG. When detecting the surface, an "L" level signal is output. Further, as described above, the film movement amount detecting means 8 has a configuration as shown in FIG. 7, but as the film moves, as shown in FIG.
I). As the magnetic recording means 9, a magnetic head is used in the present embodiment.
Further, regarding magnetic recording during one-frame winding, FIG.
3. The processing is performed by using the interrupt processing of the CPU 5 as shown in FIG.

As described above, the operations and processes shown in FIG. 6 are performed, and when the one-frame winding process in step S8 is started, the processes shown in FIGS. 8 and 9 are performed.

That is, various flags used for the one-frame winding control are cleared (step S18), and the JPICN, WPR1 and WPR2 signal counters JPICN are cleared.
T, WPR1CNT, and WPR2CNT are initialized to “0”. (Steps S19 to S21).

Next, the driving motor drive voltage is set to Vm1 (step S22). The feeding motor is turned on (step S23). Next, a deadlock timer (single-frame winding limit time), a JPI signal detection limit timer,
The WPR2 signal detection limit timer is started (steps S24 to S26), the timer for measuring the JPI signal width is started (step S27), and the magnetic head 9 starts to supply a head current (-) (step S24). S28).

Thereafter, it is determined whether or not the rise of the WPR1 signal has occurred (step S29).
Then, the process goes to step S35 to detect the falling edge of the WPR2 signal. If there is no fall of the WPR2 signal in this step S35, it is determined whether or not the limit time for the detection of the WPR2 signal has elapsed (step S4).
4) If the time has elapsed, the WPR2 limit flag is set (step S57), and the process proceeds to step S90 in FIG. On the other hand, if the time has not elapsed in step S44, the process proceeds to step S39.

If the fall of WPR2 is detected in step S35, the WPR2 signal counter (WP
R2CNT) is counted up (step S36),
Next, it is determined whether or not WPR2CNT = 1, that is, whether or not the falling detection of the WPR2 signal is the first time (step S37). Here, if it is not the first time, step S39
Then, if it is the first time, the recording timer according to the JPI signal width is started (step S38A), and the interruption of the recording timer is permitted (step S38B).

Next, in step S39, it is determined whether or not the JPI signal has fallen.
The I signal counter (JPICT) is counted up (step S40), and the JPI measurement timer
The width is read (step S41), and the JPI width measurement timer is restarted to measure the next JPI signal width (step S42). Then, it is determined whether a predetermined number of JPI signals have been detected (step S43). If not detected, the process proceeds to step S46. If detected, the process proceeds to step S47.

If no fall of the JPI is detected in step S39, it is determined whether the JPI detection limit time has elapsed (step S45), and if it has elapsed, the JPI limit flag is set (step S5).
8), and proceed to step S60 shown in FIG. If the time has not elapsed in step S45, the process proceeds to step S45.
At 46, it is determined whether the deadlock time has elapsed.

If the deadlock time has not elapsed in step S46, it is determined whether or not all data to be recorded has been recorded (step S48). If not, the flow returns to step S29 shown in FIG. If the recording has been performed, the interruption of the recording timer is prohibited (step S4).
9), the head current is switched to (+) (step S5)
0), and return to step S29 in FIG.

If the deadlock time has elapsed in step S46, a rewind request flag is set in step S47, and step S50 shown in FIG.
Move to A.

Returning to FIG. 8, in step S29, W
If the rise of PR1 is detected, the WPR1 signal detection counter (WPR1CNT) is counted up (step S30). Next, it is determined whether or not WPR1CNT = 2, that is, whether or not the rise of the WPR1 signal has been detected twice (step S31). If the rise of the WPR1 signal has not been detected twice, the step shown in FIG. In step S32, the power supply of the feeding motor is turned off. In step S33, the process waits for the time TS1. Next, the motor voltage is set to Vm2 (step S34), the motor is turned on again, and the process proceeds to step S35.

Returning to FIG. 8, if the rise of the WPR1 signal is detected twice in step S31, the interruption of the recording timer is prohibited (step S50A), and the short brake of the motor is applied (step S51). T
Wait for the time of S2 (step S52). Next, step S
At 53, the motor is reverse braked and waits for the time TR (step S54), again performs short brake at step S55, and waits for the time TS3 (step S5).
6).

The above is the operation when the perforation detecting means and the film moving amount detecting means function normally.

Next, the second perforation detecting means 7 (WPR2) and the film moving amount detecting means 8 (J
PI) will be described when one or both of them fail.

First, J of the film movement amount detecting means 8
If the PI signal is not generated due to, for example, roller slippage, that is, if it is determined in step S45 (see FIG. 9) that the JPI detection limit time has elapsed, the process proceeds through step S58 to step S60 (see FIG. 9). 10
Processing).

After this, step S6 shown in FIG.
Steps S0 to S65 are the same as steps S29 to S34 (see FIGS. 8 and 9), and a description thereof will be omitted. Steps S76 to S87 shown in FIG. 10 also correspond to steps S43 to S56 described above.
(Refer to FIG. 9 and FIG. 8), and the description here is omitted.

In FIG. 10, after step S65, the feed motor is turned on again in step S88,
Next, in step S66, the rising edge of the WPR2 signal is detected. If the rising of the WPR2 signal is not detected in step S66, the process proceeds to step S74. If the rising is detected, the process proceeds to step S67.
The timer for measuring the R2 signal width is started.

Thereafter, the falling edge of the WPR2 signal is detected (step S68).
4 and if a fall of the WPR2 signal is detected, the WPR2 signal counter (WPR2) is determined in step S89.
2CNT). After this, WPR2C
It is determined whether or not NT = 1, that is, whether or not the fall of the WPR2 signal has been detected once (step S6).
9) If WPR2CNT = 1, go to step S76; if WPR2CNT = 1, go to step S70
The width of the WPR2 signal is read from the PR2 signal width measurement timer. Thereafter, the recording timer according to the width of the WPR2 signal is started (step S72), and interruption of the recording timer is permitted (step S73).

In step S74, it is determined whether the WPR2 signal detection limit time has elapsed. If not, the process proceeds to step S76. On the other hand, if the WPR2 signal detection limit time has elapsed in step S74, the WPR2 limit flag is set (step S7).
5), and proceed to step S120 shown in FIG.

The above is the processing in the case where the JPI signal is not detected even if a predetermined time has elapsed after the start of feeding.

Next, within the WPR2 detection limit time, W
A process when the falling edge of the PR2 signal is not detected, that is, when the WPR2 has failed will be described.

If it is determined in step S44 (see FIG. 9) that the WPR2 detection limit time has elapsed, the process proceeds to step S90 shown in FIG. 11 through step S57.

In this step S90, it is determined whether or not the JPI count value (JPICTN) is 0, that is, whether WPR2
By the time the limit time has elapsed, it is determined whether or not JPI is detected. If JPICNT is not 0, the process proceeds to step S120 shown in FIG. 12, and if JPICNT is 0, the process proceeds to step S91. Note that the subsequent step S
Steps S91 to S96A are the same as steps S29 to S34 and step S59, and a description thereof will be omitted. Steps S99 to S10
0 and Steps S101 to S105 are the same as Steps S38A to S38B and Steps S46 to S50, respectively.
Steps S106 to S112 are the same as steps S50A to S56, and a description thereof will be omitted.

In FIG. 11, in step S97, it is determined whether or not a predetermined time has elapsed after the start of feeding, and
If it has not elapsed, the process proceeds to step S101, and if it has elapsed, the process proceeds to step S99, and a timer for recording a predetermined time is started.

In step S90, JPICN
If T = 0, the process proceeds to step S120 shown in FIG. 12, but after step S120, step S125A
Up to this, steps S29 to S34 and step S59 are the same as steps S132 to S133, and steps S132 to S133 are the same as steps S38A to S38.
Similarly to B, steps S134 to S145
Steps S46 to S56 are the same as those described above, and a description thereof will be omitted.

In FIG. 12, at step S126, JP
The falling of the I signal is detected, and if not detected, the process proceeds to step S134. If the rising of the JPI signal is detected, the JPI signal detection counter (JPICTN) is counted up in step S127. Thereafter, the JPI width is read from the JPI width measurement timer (step S128), and JP is executed to measure the next JPI width.
Restart the I width measurement timer (step S12)
9).

Next, it is determined whether or not the falling of the JPI signal has been detected X times (step S130). If not detected, the process proceeds to step S134. If detected, the process proceeds to step S132 to start the recording timer. Let it.

Next, magnetic recording interruption processing in the magnetic recording camera of the present embodiment will be described with reference to the flowcharts of FIGS.

In the magnetic recording camera according to the present embodiment, the interruption process is performed by setting an appropriate time in the recording timer, so that the interruption process is performed at each set time. Only if interrupts are enabled).

First, when an interrupt occurs, step S
At 150, it is determined whether the data to be recorded is "0" or "1". If it is "1", it is determined at step S151 whether or not it is the first half of the bit.
(Step S152), and it is determined whether the JPI limit flag is "1" or "0" (step S1).
53), a recording timer is set according to the JPI width (step S154). Here, the data is 1
Since the first half of the bit is recorded, the first half (head current +) shown in FIG. 3B has a longer head current waveform than the second half (head current-). Set.

Next, the recording timer is restarted (step S155), a timer (short time) for the second half recording is set (step S156), and the process returns to the point where the interruption occurred.

If it is determined in step S153 that the JPI limit flag = 1, it is determined whether the WPR2 limit flag is "0" or "1" (step S15).
7). If "0" here, the process proceeds to step S158 to set a recording timer (long time) according to the WPR2 signal width, and restart the recording timer (step S159). After that, for the record of the latter half, W
After setting the recording timer (short time) according to the PR2 signal width (step S160), the process returns to the interrupt source.

If the WPR2 limit flag is "1" in step S157, the flow advances to step S161 to restart the recording timer for a predetermined time, and return to the interrupt source.

If it is not the first half in step S151, that is, in the case of the second half recording, the head current is switched (step S162), and the above-mentioned step S1 is performed.
56 or step S160, or restart the recording timer for a predetermined time (step S163), and set whether the next bit to be recorded is “0” or “1” (step S164). Return to the interrupt source.

On the other hand, if the data to be recorded is "0" in step S150, the process proceeds to step S16 shown in FIG.
5 to the above steps S151 to S164.
When the recording data of "1" is "1", the setting method of the recording timer is reversed, that is, the time of the head current + is set shorter and the time of the head current-is set longer. Others are the same, and the description is omitted here.

As described above, the magnetic recording camera of the present embodiment has been described. The operation and effect of the present embodiment will be briefly described below.

First, the feed motor is turned on, and a failure of the JPI is determined based on whether a change in the JPI signal is detected within the first time. Next, the failure of the WPR2 is determined based on whether or not a change in the WPR2 signal is detected within the second time.
By detecting the failure of the above two detecting means, the following four states can be distinguished.

(1) Both JPI and WPR2 are normal (2) JPI: normal, WPR2: failure (3) JPI: failure, WPR2: normal (4) Both JPI and WPR2 are failure.

Next, each of the states (1) to (4) will be briefly described.

In the case of state (1): JPI within the first time
This is the case where a change in the signal is detected and a change in the WPR2 signal is detected within the second time. In this case, as shown in the timing chart of FIG.
When the first falling of the signal is detected, for example, magnetic recording of photographing data such as a date is started, and the frequency of the magnetic recording is set to a frequency corresponding to the width of the JPI signal (that is, the film moving speed). Each time the width changes, the frequency is changed, magnetic recording is performed at a frequency corresponding to the film moving speed, and the second rising of the WPR1 signal is detected to stop the feeding control.

In the case of state (2): JPI within the first time
This is the case where a change in the signal is detected and no change in the WPR2 signal is detected within the second time. That is, there is no WPR2 signal in the timing chart shown in FIG. 5, and if control is attempted as in the state (1), there is no signal for starting magnetic recording. After the start, when a predetermined number of JPI signals are detected, magnetic recording is started. Others are the same as in the above state (1).

In the case of state (3): JPI within the first time
This is the case where no change in the signal is detected and no change in the WPR2 signal is detected within the second time. That is, in the case where there is no JPI signal in the timing chart of FIG. 5, in this case, the first HI time of the WPR2 signal is measured, and the WPR signal is recorded at the magnetic recording frequency according to the time.
When the first falling signal of the two signals is detected, magnetic recording is started.

In the case of state (4): First, no JPI signal change is detected within the first time, and
This is the case where no change in the PR2 signal is detected. That is, there is no JPI signal or WPR2 signal in the timing chart of FIG. 5, and in this case, a predetermined time (first, second
After a longer period of time, the magnetic recording is started. The recording frequency of the magnetic recording is a predetermined frequency.

As described above, according to the magnetic recording camera of the present embodiment, even when one of the film movement amount detecting means and the perforation detecting means fails, the output of the normal detecting means is substituted. This makes it possible to magnetically record shooting information such as shooting date and time accurately.

In the above-described embodiment, the motor is turned off for a predetermined time (TS1) or the motor drive voltage is switched to Vm2 according to the output of the first perforation detecting means (WPR1). However, this processing may be omitted, and the feeding may be stopped by detecting the second rising of WPR1.

[Appendix] According to the embodiment of the present invention as described in detail above, the following configuration can be obtained. That is,
(1) A first position on the film winding direction side of the outer periphery of the frame to be photographed and a second position of the outer periphery of the frame to be photographed separated from the first position by a predetermined distance in the longitudinal direction of the film. In a camera to be used with the provided perforation and the film provided with the magnetic recording section, a perforation detecting means for detecting the position of the perforation and a time for which the perforation detecting means detects a predetermined different perforation. Clocking means, based on the output from the clocking means, a magnetic recording frequency determining means for determining a magnetic recording frequency when magnetically recording on the film, and a roller in contact with the film, the rotation amount of the roller The amount of rotation is detected based on the rotation amount detecting means to be detected and the output from the rotation amount detecting means. Determining means for determining whether or not the roller and the roller are slipping, and a drive magnetic recording frequency determined by the magnetic recording frequency means when it is determined that the rotation amount detecting means is not operating normally. And a magnetic recording control means for starting magnetic recording.

[0090]

As described above, according to the present invention, it is possible to provide a magnetic recording camera capable of always accurately recording magnetic information even if a problem occurs in film movement.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a magnetic recording camera according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a film used in the magnetic recording camera of the embodiment.

FIG. 3 is a diagram showing a P used in the magnetic recording camera of the embodiment.
FIG. 3 is a diagram illustrating an example of data recorded in a PM recording method.

FIG. 4 shows a first example of the magnetic recording camera of the embodiment.
FIG. 3 is a diagram showing a schematic positional relationship among a perforation detection unit, a second perforation detection unit, a magnetic recording unit, and a film movement amount detection unit.

FIG. 5 shows a first example of the magnetic recording camera of the embodiment.
5 is a timing chart showing each operation of a perforation detection unit, a second perforation detection unit, a magnetic recording unit, and a film movement amount detection unit.

FIG. 6 is a flowchart showing main operations of the magnetic recording camera of the embodiment.

FIG. 7 is an explanatory diagram showing a configuration of the film movement amount detecting means in the magnetic recording camera of the embodiment.

FIG. 8 is a flowchart showing a sequence of winding one frame in the magnetic recording camera of the embodiment.

FIG. 9 is a flowchart showing a sequence of winding one frame in the magnetic recording camera of the embodiment.

FIG. 10 shows 1 in the magnetic recording camera of the embodiment.
It is a flowchart which shows the sequence of frame winding.

FIG. 11 is a diagram illustrating a magnetic recording camera according to the embodiment;
It is a flowchart which shows the sequence of frame winding.

FIG. 12 shows the magnetic recording camera according to the embodiment.
It is a flowchart which shows the sequence of frame winding.

FIG. 13 is a flowchart showing a magnetic recording interruption process in the magnetic recording camera of the embodiment.

FIG. 14 is a flowchart showing a magnetic recording interruption process in the magnetic recording camera of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Film 2 ... Photographing screen 3 ... Perforation 4 ... Film cartridge 5 ... CPU 6 ... First perforation detection means (WPR1) 7 ... Second perforation detection means (WPR2) 8 ... Film movement amount detection means (JPI) 9 ... Magnetic Recording means 10 Time measuring means 11 Film feed driving means 12 Signal processing means 13 Driven roller shaft 14 Driven roller body 15 Photoreflector (JPI) 16 Encoder

Claims (3)

[Claims] 1. A magnetic recording camera capable of performing magnetic recording on a magnetic recording section provided on a film, comprising: a perforation detecting means provided on the film for detecting perforation; and rotating in conjunction with the movement of the film. Pulse signal output means for outputting the amount of movement of the film as a pulse signal; pulse signal width detection means for detecting the width of the pulse signal based on the output from the pulse signal output means; Magnetic recording frequency determining means for determining a magnetic recording frequency when magnetically recording on the film based on an output from the detecting means; and a magnetic recording frequency determined by the magnetic recording frequency means based on an output from the perforation detecting means. Magnetic recording control means for starting magnetic recording at a recording frequency. Features a magnetic recording camera. 2. A magnetic recording camera capable of performing magnetic recording on a magnetic recording section provided on a film, comprising: a perforation detecting means provided on the film for detecting perforations; Pulse signal output means for outputting the amount of movement of the film as a pulse signal by rotating the film, time-measuring means for measuring the time during which the perforation detection means is detecting a predetermined perforation, and said pulse signal output means Determining means for determining whether or not is operating normally; magnetic recording frequency determining means for determining a magnetic recording frequency when magnetically recording on the film based on an output from the timing means; and the pulse signal When it is determined that the output means is not operating normally, the magnetic recording frequency means And a magnetic recording control means for starting magnetic recording at the magnetic recording frequency determined in step (a). 3. A magnetic recording camera capable of performing magnetic recording on a magnetic recording section provided on a film, wherein the camera is provided in an aperture corresponding to a photographing frame and detects perforations provided on the film. A first perforation detecting means, and a predetermined distance from the first perforation detecting means in an aperture corresponding to a photographed frame;
Second perforation detection means for detecting perforation provided on the film; and magnetic recording frequency determination means for determining a magnetic recording frequency for magnetically recording on the film based on an output from the first perforation detection means. A magnetic recording control means for starting magnetic recording at the magnetic recording frequency based on a predetermined output from the first perforation detecting means; and a movement of the film by rotating in conjunction with the movement of the film. Pulse signal output means for outputting an amount as a pulse signal; operation determination means for determining whether the first perforation detection means and the pulse signal output means are operating normally; and determination results of the operation determination means Based on the first perforation detecting means and the pulse signal When it is determined that at least one of the force means is not operating normally, the operation of the magnetic recording control means is stopped and the feeding of the film is stopped based on the output from the second perforation detection means. A magnetic recording camera, comprising: stop control means.