JP3017884B2 - Camera magnetic recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording device for a camera, and more particularly, to a camera using a photosensitive film having a magnetic recording portion on which photographing information is magnetically recorded.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 3-223737 discloses an example of a camera having a magnetic recording section for magnetically recording photographic information on a part of a photosensitive film. This publication discloses that photographing information of each frame is stored in information storage means such as a RAM, and RAM data is recorded on a magnetic track during a rewind operation after photographing is completed.

[0003]

However, in the above-described camera magnetic recording apparatus, since the recording operation is performed in conjunction with the rewinding of the film, the data recorded on the magnetic track is reproduced and accurately recorded. It has the drawback that it cannot be determined whether or not there is.

The magnetic recording apparatus for a camera according to the present invention has been made in view of such a problem. The purpose of the apparatus is to check whether data recorded on a magnetic track is accurately recorded every time a picture is taken. It is an object of the present invention to provide a magnetic recording device of a camera capable of determining whether or not the recording is performed.

[0005]

In order to achieve the above object, a magnetic recording apparatus for a camera according to a first aspect of the present invention provides a camera which uses a film having a magnetic recording portion as a photosensitive film, and winds the film. Magnetic recording means for recording data on the magnetic recording portion of the film according to the operation, and magnetic reading means for reproducing the data recorded on the magnetic recording portion according to the rewinding operation of the film, A non-volatile storage unit for storing the data when the data is recorded by the magnetic recording unit; and data read by the magnetic reading unit and stored in the non-volatile storage unit when the film is rewound. Comparing means for comparing the recorded data with the recorded data, and determining whether or not the data is normally recorded based on the result of the comparison by the comparing means. Comprising a determining means for. Also,
The magnetic recording device for a camera according to the second invention is the first invention.
In the magnetic recording device for a camera according to
When it is determined that data is not recorded normally
, A warning is displayed. Also, the turtle according to the third invention
The magnetic recording device of the present invention is a magnetic recording device of the camera according to the first invention.
In the recording device, the data is normally recorded by the determination means.
If it is determined that the film has not been recorded,
The data is recorded again on the magnetic recording unit.

[0006]

[Action] That is, in the first invention, the recorded data on the magnetic recording portion of the film in accordance with the winding operation of the film having a magnetic recording portion, recorded in accordance with the rewinding operation of the film data To play. At the same time, when the data is recorded in the magnetic recording unit, the data is also stored in the non-volatile storage unit, and when the film is rewound, the data read from the magnetic recording unit and the non-volatile storage unit are stored. And whether the data has been normally recorded is determined based on the result of the comparison. Further, in the second invention, in the first invention,
In the description, the data is recorded normally by the determination means.
If it is determined that no warning has been given, a warning will be displayed.
To do. Further, in the third invention, the first invention
The data is normally recorded by the determination means.
When it is determined that there is no magnetic recording,
Record the data again in the section.

[0007]

FIG. 1 is a block diagram showing an embodiment of the present invention. A microcomputer (hereinafter, referred to as μCOM) 1 that performs overall control of a camera to which the present embodiment is applied.
In 00, a display device 101 that uses a liquid crystal (LCD) to display the number of frames and the like, a data printing device 102 that prints the date on a film, and an electrically erasable E ² PROM
And a storage device 103 (hereinafter simply referred to as E ²⁾ for storing the number of photographed frames, various adjustment values, and the like. PROM) is connected. In addition, this μCOM100 has
The motor control circuit 104 is connected to the
Reference numeral 4 denotes a mode for decoding the signal sent from the μCOM 100 and driving the motors M1 (51) and M2 (52).
Motor voltage setting, motor selection and operation (rotation, reverse rotation,
Brake, off). The motor M1 is used for film winding and rewinding. The motor M2 is used for feeding the film.

The motor control circuit 104 and the motor M1,
Transistors 105 to 108, 20 are connected between motor M2.
0 to 203 are connected, and these transistors constitute a motor bridge circuit. The motor M1 rotates clockwise when the transistors 105 and 108 are turned on, rotates counterclockwise when the transistors 106 and 107 are turned on, and brakes when the transistors 106 and 108 are turned on. The motor M2 rotates clockwise when the transistors 200 and 203 are turned on, and rotates counterclockwise when the transistors 201 and 202 are turned on.
When 3 is on, the brakes are applied.

Further, a film sensitivity reading device 115 and a sector driving device 121 are connected to the μCOM 100, and the film sensitivity reading device 115 reads film sensitivity information and the number of films provided in the film pattern, and To send these data. The sector driving device 121 receives the signal from the μCOM 100 and opens and closes the sector 129.
The open / close state of the sector 129 is transmitted to the μCOM 100.

Reference numeral 126 denotes a lens frame for a photographing lens group. The lens frame includes a focusing lens 123, and the movement of the focusing lens 123 is converted into a pulse signal and transmitted to the μCOM 100. Lens drive detection device 1
24, and a gear 125 for transmitting the driving amount from the motor M2 for driving the focusing lens 123. Further, a sector 129 driven by the above-described sector driving device 121 is provided in the lens frame 126 to control the exposure amount.

A distance measuring device 128 for measuring the distance of the subject 131 and a photometric device 1 for measuring the luminance of the subject.
27 is connected to the μCOM 100. The μCOM 100 is also connected to a flash control device 132.

When the μCOM 100 is turned on, a photograph is taken.
Camera power switch (PWSW) 13 that enables shadowing
4 and a midway rewind switch (RWSW)135
And a release switch (R
ELSW) 136 and the back cover that is turned on when the back cover is open.
Back cover detection switch (BKSW) for detecting opening and closing
137And are connected. In addition, the film
Photoreflector (WPR) 69 for detecting the
Connected to the μCOM 100. WPR69 is par
Generate two pulse signals for each folation
Output to μCOM100. With this pulse signal, μC
The OM 100 detects a moving amount and a moving speed of the film.

As will be described below, the magnetic information control circuit 116 outputs data to a magnetic track provided on a film.
It is provided for recording data and reproducing data from a magnetic track. FIG. 2 is a block diagram of the magnetic information control circuit 116 described above.

ΜCOM 100 includes control lines CS, D
Control IC2 by L, D7 to D0, SEL1, SEL2
Control 5 The control IC 25 is μCOM100
In accordance with the instruction from, the recording of data on the magnetic track 1a of the magnetic recording section provided on a part of the film 72 and the reproduction of data from the magnetic track 1a are executed. here,
The magnetic recording section may be provided on the entire back surface of the film 72.

The magnetic head 3a is used for recording data on the magnetic track 1a and reproducing data. The buffers 23a and 23b supply a current to the magnetic head 3a in accordance with the outputs of the control IC 25 OUT1 and OUT2 during data recording. The head amplifier 5a amplifies a signal generated by the magnetic head 3a according to a magnetic field on the magnetic track 1a during data reproduction. This signal is shaped into a waveform by the comparator 7a, the comparator 9a , and the OR circuit 11a, and is input to the DT of the control IC 25. Control I
C25 reproduces data on the magnetic track 1a from the signal input to the DT and the synchronization signal.

A clock signal input to CLK is used as a synchronizing signal necessary for recording and reproducing data. The clock signal at the time of data recording is a clock generator 19.
Use the clock signal output by. This clock signal is recorded on the magnetic track 1b in parallel with the data recording operation. The recorded clock signal is used as a synchronization signal at the time of data reproduction. The output of the clock generator 19 is divided by the flip-flop 17 and
Output to buffers 13a and 13b. Buffer 13a
And 13b supply a current to the magnetic head 3b according to the output.

The signal generated by the magnetic head 3b according to the magnetic field on the magnetic track 1b is amplified by the head amplifier 5b. The amplified signals are supplied to comparators 7b and 9
a, The waveform is shaped by the OR circuit 11b. Gate 2
1a is controlled by SEL1 of μCOM100.
Then, at the time of data reproduction, the clock signal output from the OR circuit 11b is output to CLK. Gates 15a, 15
b and 21b are controlled by SEL2. During data recording, the gate 21b outputs the clock signal of the clock generator 19 to CLK. And gates 15a, 1
5b means that the signal of the flip-flop 17 is
a and 13b. FIGS. 3A and 3B are time charts of the data recording operation.

For example, assume that data "10110011" is recorded. Data is recorded by associating one of the binary information ("1" in this embodiment) with the reversal of the magnetization. That is, when it is "1", the state of magnetization is inverted to a saturation value of N → S (or a saturation value of S → N), and when it is "0", it is kept as it is. This recording method is N
RZ1 (Non Return to Zero change to 1).
In order to perform this operation, the control IC 25 changes the Hi signal from OUT1 to OUT2 (or OUT1) when "1".
2 → OUT1), the head current is inverted. A current sufficient to saturate the magnetic material flows through the head 3a.

The time during which the control IC 25 outputs each data (“1” or “0”) is determined by the clock generator 19.
Is determined by the clock signal. The control IC 25 changes the states of OUT1 and OUT2 in synchronization with the falling of the clock signal. This clock signal needs to be recorded on the magnetic track 1b. That is, the clock signal is frequency-divided by the flip-flop 17 and output from Q and Q (bar). The outputs of Q and Q (bar) are inverted in synchronization with the rise of the clock signal. The buffers 13a and 13b supply a current to the magnetic head 3b according to this output. Therefore, the magnetic material has a magnetization state of N → S saturation value (or
(Saturated value of S → N). The reason for using the rising edge different from the data synchronization is to take into account the convenience during data reproduction. The reason why the clock signal is also recorded on the magnetic track simultaneously with the data recording is that it is difficult to perform the data recording with the film moving speed kept constant. Also, there is no guarantee that the film moving speed is constant during reproduction. Therefore, the interval of signals output serially during reproduction becomes irregular, and a fixed clock signal cannot be used as a synchronization signal. FIG. 4 is a time chart of the data reproducing operation.

When the magnetized magnetic material moves in front of the head, the magnetic flux passing through the magnetic head changes, and the magnetic head generates a voltage corresponding to the data recorded on the magnetic material. When the magnetic track 1a is magnetized as shown in the figure, the magnetic head 3a generates a voltage at a position where the magnetization state is reversed.
This voltage is amplified by the head amplifier 5a and output to the comparators 7a and 9a. The comparator 7a
The + V _ref, the comparator - motor 9a compares the output of each head amplifier 5a by -V _ref. Both the positive signal and the negative signal output from the head amplifier 5a correspond to data "1".

The outputs of the two comparators are OR circuit 1
1a and output to the DT of the control IC 25. The control IC 25 reproduces data recorded on the magnetic track 1a based on the input signal and the synchronization signal.
A clock signal recorded on the magnetic track 1b is used as the synchronization signal. This signal is detected by the magnetic head 3b. After the output voltage of the magnetic head 3b is amplified by the head amplifier 5b, it is converted into a clock signal by the comparator 7b, the comparator 9b, and the OR circuit 11b. Then, it is output to CLK of the control IC 25. When a pulse signal is input to DT between two pulse signals on the clock signal, the data is "1". And DT
When there is no pulse signal to be input to, the data is "0".

Hereinafter, a communication method between the control IC 25 and the μCOM 100 will be described based on the time charts of FIGS. Communication starts when the μCOM 100 sets the CS line from Hi to Low. It is assumed that the communication request is generated only from the μCOM 100.
After setting the CS line to Low, the μCOM 100 synchronizes with the DL signal and outputs the 8-bit data bus lines D7 to D7.
Outputs command data to D0. The command data is used by the control IC 25 to identify the communication mode. Therefore, in any communication mode, the command data
The data is located at the head of the communication data.

FIG. 5 is a time chart of the store mode. The store mode is a mode in which data to be recorded is stored in the memory of the control IC 25 prior to data recording on the magnetic track 1a. μCOM100 is command data
After outputting the data, the data to be recorded is output to the control IC 25 in the order of recording on the magnetic track 1a. When the transfer of all data is completed, the μCOM 100 sets the CS line from Low to Hi, and the communication ends.

FIG. 6 is a time chart of the write mode. The write mode is a mode for recording data on the magnetic track 1a. The control IC 25 is μCOM1
When the command data from 00 is input, the magnetic head 3a
Apply current to μCOM100 outputs SE after command output.
The L2 line is set from Low to Hi. As a result, the clock signal of the clock generator 19 is output to CLK. The control IC 25 stores data stored in the memory.
Data is read out bit by bit in synchronization with the clock signal. When the data is "1", the current of the magnetic head 3a is inverted. When the control IC 25 records all the data in the memory, the operation ends. μCOM100 is a magnetic head 3
In order to stop the current flowing through a, the CS line is set from Low to Hi, and the SEL2 line is set from Hi to Low.

FIG. 7 is a time chart of the lead mode. The read mode is a mode for reproducing data recorded on the magnetic track 1a. After outputting the command data, the μCOM 100 sets the SEL1 line from low to high. Then, the clock signal reproduced from the magnetic track 1b is output to CLK. The μCOM 100 reads data from the magnetic track 1a in synchronization with the clock signal. Then, when data of 8 bits is input,
Output to the bus lines D7 to D0. The control IC 25
Since a signal is output to the DL line due to
The COM 100 may take in data in synchronization with the signal on the DL line. The data reproducing operation is performed by the μCOM100
Set the CS line from Low to Hi.

8 to 10 are perspective views of the film feeder of the camera according to the embodiment of the present invention as seen through from the rear. FIG. 8 shows a state immediately after the film cartridge 70 is loaded in the camera body, and FIG. FIG. 10 shows a state in which the film 72 is wound around the take-up spool 57, and FIG. 10 shows a state in which the film 72 is rewound into the film cartridge 70. FIG. 11 is a rear view of the camera of this embodiment without a back cover, and FIG. 12 is a horizontal sectional view of the camera of this embodiment. FIG. 13 is a perspective view showing a film cartridge 70 used in the camera of this embodiment.

A pinion gear 53 is provided on an output shaft of a film winding / rewinding motor 51 (M1) provided in the camera body 31 shown in FIG. 11, and the pinion gear 53 meshes with a sun gear 54. are doing. Further, the sun gear 54 meshes with a planet gear 55, and the planet gear 55 is supported via a gear arm 56 so as to revolve around the rotation axis of the sun gear 54.

A film take-up chamber 34 provided on the right side of the camera body 31 as viewed from behind is provided with a film 7.
A take-up spool 57 for taking up the take-up gear 2 is rotatably provided. When the planet gear 55 revolves counterclockwise on the upper end surface of the take-up spool 57, A spool gear 57a that meshes with 55 is provided integrally. Further, a perforation locking claw 57b, which engages with a perforation of the film 72 described later, protrudes from a lower outer peripheral surface of the take-up spool 57.

When the planetary gear 55 revolves clockwise, the idle gear 67 is positioned at a position where the planetary gear 55 meshes with the planetary gear 55.
In this case, the planetary gear 55 is connected to a coupler gear 63 described later via idle gears 67, 66, 65, and 62.

The camera body 31 has a film delivery motor 5
2 (M2) are provided. A pinion gear 58 is provided on the output shaft of the film delivery motor 52, and the pinion gear 58 meshes with a sun gear 59. Further, the sun gear 59 meshes with a planetary gear 60, and the planetary gear 60 is supported via a gear arm 61 so as to revolve around the rotation axis of the sun gear 59.

[0031] In addition, the left toward from the rear of the camera body 31
On the side , a film cartridge 70 shown by a two-dot chain line in FIG.
The patrone storage room 32 in which is stored is provided.
Above the patrone storage chamber 32, as shown in FIG. 11, a coupler gear 63 having a coupler 64 whose tip projects in a “-” shape is rotatably provided.
As shown in a perspective view in FIG. 13, the coupler 64 engages with a groove provided on an upper end surface of a feed spool 71 provided on the film cartridge 70, and integrally with the feed spool 71 around the axis. Is done. The coupler gear 63 always meshes with the idle gear 62 as described above.

The film 72, which is slightly closer to the center than the take-up spool 57, is fixed to the camera body 31 at a height facing the perforation, and the perforation of the film 72 is maintained. A photoreflector (hereinafter, abbreviated as WPR) 69 that outputs a pulse signal each time it passes is provided.

The film cartridge storage chamber 32 and the film winding chamber 34 are integrally formed of the same member as shown in FIG. In front of the two, a shutter mechanism 3 as shown in FIG.
8, a photographic lens 37 is provided, and a battery 44 and a strobe condenser 43 are housed on the right side of the film winding chamber 34.

Behind the film cartridge storage chamber 32, a back lid 42 which can be opened and closed with respect to the camera body 31.
The pressure plate 40 for pressing the film 72 forward is provided on the right side. Further, the film rail surface 35, the pressure plate rail surface 3
6 are provided, and the film 72 is kept flat by being pressed against them.

The pressure plate 40, the film cartridge storage chamber 32, and the pressure plate rail surface 36 have guide slopes 40, respectively.
a, 41, and 36a are provided, and the guide slopes 40a, 41, and 36a are provided at the height of the film 72 when the film 72 is sent out by the feeding spool 71 provided on the film cartridge 70. This guides the direction. Hereinafter, the μCOM will be described with reference to FIGS.
100 will be described. First, the operation of the main routine will be described with reference to FIG.

When the battery 44 is loaded in the camera, μ
The power of the COM 100 is reset. And S
The operation starts from 100. In S100, initialization of an I / O port, initialization of a memory, and the like are performed. In S102,
The state of the BKSW is determined. When the back cover changes from open to closed, a rising signal of BKSW is generated. When a signal is detected, the process proceeds to S104. In S104, "idling", which is an operation of winding the loaded film 72 around the take-up spool 57, is executed. When the rising signal of the BKSW is not detected, the process proceeds to S106, and the state of the rewind switch RWSW is determined. When the switch is ON, the subroutine "rewind" is executed. The operation of this subroutine will be described later. If the switch is off, the process proceeds to S110, where the state of the power switch PWSW is determined. When the switch is off, the μCO
M100 enters the STOP mode. When entering this mode, the μCOM 100 stops operating.

The operation of the μCOM 100 resumes when an interrupt signal is generated by operating the SW. PWSW is ON
If so, the process proceeds to S114. In S114, the operation mode of the camera, the number of frames, and the like are displayed. In S116, the state of the release switch RELSW is determined. O
If the answer is N, the flow shifts to S118 to execute a subroutine "release process". The operation of the subroutine will be described later. R
When ELSW is OFF, S10 to check the state of SW
Move to 2.

The operation of the subroutine "release process" will be described below with reference to FIG. In S200,
Data required for AE and AF calculations is E ² Read from PROM. In S202, the film sensitivity reading device 115
The film sensitivity is read from the film cartridge 70 through the. In step S204, a distance measurement operation and a photometry operation are performed using the distance measurement device 128 and the photometry device 127, and a distance measurement value and a photometry value are obtained. In S206, the lens extension amount is calculated based on the distance measurement value. Further, the exposure time is calculated from the photometric value. In S208, the motor M2 is rotated clockwise to extend the focusing lens. The extension amount is measured by counting pulse signals generated by the lens drive detection device 124. And the count value is S
If the lens extension amount calculated at 206 matches, the driving of the motor M2 is stopped. In the case of a single-lens reflex camera, mirror up is performed here.

In step S210, a signal is sent to the sector driving device 121 to drive the sector 129 and perform exposure. A signal is sent to the flash control circuit 132 as necessary,
Flash emission is also performed. When the exposure is completed, S212
Then, the date is imprinted. In S214, a store mode command is output to the control IC 25. S21
6, the data to be recorded on the magnetic track 1a is transmitted to the control IC.
Transfer to 25. In S218, the CS line is set from Low to Hi, and the store mode ends. S220
De-recorded on the magnetic track - data same as the as the E ² P
Write to ROM. This E ² The PROM data is used as comparison data in a subroutine "rewind" described later.

In S222, a subroutine "winding up" is executed. In this subroutine, the film is wound one frame and data is recorded on the magnetic track 1a. The operation of this subroutine will be described later. In S224, the focusing lens is returned to the initial position. Control IC2
Data transferred to 5 and E ² Data stored in PROM
Are described here.

FIG. 15 shows data transferred to the control IC 25. Number - 0 from the de in the order of N ₈ of - data is transferred. The control IC25 is number - 0 de in the order of N ₈ of - recording the data on the magnetic track 1a. The transfer data from the number 0 to N ₀ is “00”.
Therefore, there is no meaningful data in the area of the magnetic track 1a where the data of ₀ to N0 is recorded. Number N
Transfer data of N ₈ from ₇ - data also, is "00". Therefore data of N ₇ to N ₈ - de meaningful even in a region where data is recorded - data does not exist.

The meaning of providing these two regions will be described below. Even if data is recorded on the magnetic track 1a,
If the data has not been correctly recorded, it is necessary to execute the recording operation again. When performing again the recording operation of the data from the magnetic information control circuit 116 of FIG. 1, the magnetic track 1
There is no need to delete a. This is because data is obtained by magnetizing the magnetic material to a saturation value of N or S. Therefore, there is no problem whether the magnetic material before data recording is magnetized or not.

First, consider the case where the recording operation is performed twice without providing the above two areas. Assume that the film moving speed in the second recording operation is lower than the first moving speed.

FIG. 20 shows the magnetization state of the magnetic track 1a at the first time and at the second time. Hatched portion of the B ₁ 1
This is a region magnetized by the second recording operation. The areas A and C are areas where data cannot be recorded because the change in the moving speed of the film is large.

Since the recording operation is performed during the winding of one frame, the start and end of the winding operation are performed by the film 72.
Must not be run because the speed of movement is not stable. It is being magnetized by the second recording operation, a hatched portion B _2. If the recording speed is the same, the film movement speed is lower in the second time than in the first time, so that B ₁ <
The B _2. Therefore, a part of the region magnetized by the first recording operation remains in B ₁ ′. The data left in B ₁ ' is unnecessary. Thus there is a possibility that not properly recognize the data recorded in the B ₂ Resuming this state data. B ₁ ′ can be reduced by changing the recording speed according to the moving speed of the film 72 or by accurately controlling the recording start position on the magnetic track 1a. However, it is difficult to lose.

Next, consider the case where the above two areas are provided and the recording operation is executed twice. The moving speed of the film 72 is set to be slower for the second time than for the first time. FIG.
1 will be described. Also in this case, B ₁ ′, which is a part of the region magnetized by the first recording operation, remains. However, the portion indicated by the horizontal line is an area where meaningless data is recorded. Therefore, even if the area B ₁ ′ is read during data reproduction, it is possible to recognize the data recorded in the hatched area. Region of horizontal lines, number of Figure 15 - 0 to N ₀ and data of N ₇ to N ₈ of - data "00" the number of can be expanded by many. The larger this area is, the higher the reliability of the recorded data is. However, the number of data that can be recorded decreases.
De of numbers -N ₁ - data "FF" and data of the numbers -N ₆ - data "FF" are meaningless de - de meaningful to other areas -
This is a "mark" for separating data regions. The data "FF" becomes "11111111" in binary representation. The control IC 25 shown in FIG.
When a pulse signal is input to T eight times in succession, it is determined as "mark".

After that, when the control IC 25 reproduces the 8-bit serial data from the magnetic track 1a, the control IC 25 converts it into parallel data and transfers it to the μCOM 100. De numbers -N ₂ - data "02" is de - co indicating the start of data - which is de. And data of the number -N ₅ - data "03" is de - co-indicating the end of the data - which is de.

The data of the numbers N _{3 to} N ₃ +13 are date data. As the data, data converted by the character code table shown in FIG. 16 is used. FIG.
This is an ASCII code defined by NSI. A character code table defined by ISO may be used. By recording data using such a code, the data becomes more versatile. Therefore, it is convenient when using data. However, there is a disadvantage that the amount of recorded data increases. When characters are converted using these code tables, the data length becomes 7 bits. However, since data recording is performed in units of 8 bits, there is an extra bit left. This one bit may be used as a redundant bit required for a parity check. A description of the parity check will not be given in the embodiment. If a parity check is performed, the control I of FIG.
What is necessary is just to let C25 execute. Character data is added to numerical data to identify its meaning.

"DATE" of numbers N _{3 to} N ₃ +3
The numerical data of N ₃ + 4~N ₃ +13 - data date de - in order to identify that it is data. Similarly, "TV", "A
V ”and“ EXP ”are the aperture value, shutter time,
Indicates the number of frames. There is also a method of identifying the meaning of numerical data by the recording order of the data. However, if the recording order is not known, identification becomes impossible. Therefore, even if the amount of data is large, it is more convenient to add character data for identification when using the data. The order in which the data is recorded must be determined so that the higher the priority, the faster the data is recorded. Even if the film stops for some reason during data recording, the earlier data will be
This is because the probability of being recorded increases. For example, when comparing the date data “minute” and “hour” with “day” and “month”, the photographer does not store the photographing time. However, the shooting date is often remembered. Therefore, it is more convenient to keep the data of "minute" and "hour".

[0050] with reference to FIG. 17 E ² The data stored in the PROM will be described. For addresses 0 to AD1-1,
It records the number of film frames, adjustment data necessary for AE / AF calculation, and the like. Address AD1 to AD2
-1 indicates that the magnetic track 1 is used in the first frame shooting operation.
The data recorded in a is stored. Hereinafter, similarly, respective data are stored in areas corresponding to the respective photographing operations.

The data in FIG. 15 corresponds to the data of the nineteenth frame. The data stored at the addresses AD19 to AD20-1 is shown in the diagram on the left. The numbers in the figure on the left are the same as the numbers used in FIG.

E ² The data stored in the PROM is numerical data. Numerical data identification data (for example, N
“DATE” of _{3 to} N ₃ +3) is commonly used for any photographing data. Therefore, every time this data is taken, E ² Storing in a PROM wastes memory. Therefore, the identification data is shown in the figure on the left.
There is no number corresponding to the data. E ² used for camera The memory capacity of a PROM is generally small. Therefore, means for using the memory efficiently must be considered. Numerical data may change with each shot, so E ² It must be stored in the PROM. Also, if there is data other than numerical data that differs for each shooting, this data
E ² It must be stored in the PROM.

The identification data is stored in the program memory of the μCOM 100. A method for storing identification data will be described with reference to FIG. Address TAD0
De of TADn - data is de numbers -N ₃ to N ₄ in FIG. 15 - corresponding to the data. However, "00" is set in the address corresponding to the numerical data. “00” is ASCI
In the I code, the data has no meaning. "00" is set for convenience in determining whether data is correctly recorded on the magnetic track 1a.

In the above embodiment, E ² Numerical data to PROM
By recording only the data, E ² The PROM capacity was not increased. However, it is possible to further reduce the capacity. Numerical data requires twice as much memory because of the operation of once replacing the actual number with a character code. For example, numbers from 0 to 9 can be represented by using 4 bits, but when represented using a code table, 7-bit data can be represented.
Become 7-bit data is eventually treated as 8-bit (1 byte) data. Therefore, twice as much memory is used. E ² Data stored in PROM
The data is used as comparison data when judging whether the data is correctly recorded on the magnetic track 1a. Therefore, any data may be stored as long as the data corresponding to the code table can be returned at the time of comparison.
For example, “5” of the numbers N ₃ +4 and N ₃ +5 in FIG.
“3” becomes “35” when stored based on the code table.
[HEX] It becomes 2-byte data of "33" [HEX]. However, if "5" and "3" are expressed as they are, "53"
[HEX] and only 1-byte memory capacity is required. Then, when using as comparison data, 2
There is no problem if it is converted to byte data. The later-described subroutine "comparison" in FIG. 24 does not use the storage method described here. However, E ² PROM
It can be executed by adding a process of converting the data of the above based on the code table. And E ² There is also a method of reducing the data stored in the PROM. Data to be left on the magnetic track 1a
Not all of the data need to be recorded correctly. The important data in FIG. 15 is date data. It is also important if there is any data necessary for printing the photo. Therefore, it is not forgiven that these data are missing. However, even if there is an abnormality in the data such as the TV value and the AV value, it does not cause a big problem.
Therefore, it is possible to check only the data of high importance among the data recorded on the magnetic track 1a. Then E ² The number of comparison data to be stored in the PROM is further reduced. The subroutine "winding" will be described below with reference to FIG.

In step S600, the comparison data TX for the timer 2 described later is stored in E ² Read from PROM. In S602, the take-up spool 57 starts winding the film 72 by rotating the motor M1 clockwise. S
In 604, the time TW required for winding one frame is set by the timer 1
Set to. In S606, the performance counter PFC is cleared. In S608, the timer 2 is cleared. The timer 2 is used for detecting the moving speed of the film 72. In S610, the write flag WF is cleared. This flag is set when a write command (FIG. 6) is output to the control IC 25. In S612, the pulse signal of the photoreflector (WPR) 69 is determined. When the rising edge of the pulse signal is detected, proceed to S614.
If no detection is made, the process moves to S640. S640
Then, the timer 1 counts down. In S642, the timer 2 is counted up to measure the interval between the pulse signals. In S652, it is determined whether the counting operation of the timer 1 has been completed. When finished, S654
If not completed, the process proceeds to S612. S
In steps 654 and S656, the motor M1 is stopped. Then, in S658, the CS terminal is set from Low to Hi, and the recording operation of the control IC 25 is stopped. Then, it shifts to the “rewind” subroutine. Completion of the counting operation of the timer 1 indicates that the winding operation is not completed even if the time TW required for winding one frame has elapsed. That is, it indicates that the end of the film has been reached. The transition from S652 to the "rewind" subroutine is not possible if the camera is operating normally. Normally, the processing shifts from S638 to be described later.

When the flow shifts from S612 to S614, it is determined whether the value of the timer 2 is smaller than TX. TX is already E ² This is data read from the PROM. Since the value of the timer 2 indicates the interval between pulses output from the photoreflector (WPR) 69, it can be determined from the determination result in S614 whether the moving speed of the film 72 has become faster than a predetermined value. That is, when the speed is faster than the predetermined value, the process proceeds to S616, and when the speed is slower, the process proceeds to S622.

In step S616, the state of the write flag WF is determined. When the flag is set, the process proceeds to S622, and when the flag is cleared, the process proceeds to S618. S6
At 18, a write command is issued to the control IC 25 (described with reference to FIG. 6).
Is output.

Then, the write flag is set in S620. Thereafter, since the flag is set, the processing of S618 is not executed. The processing of S614 to S620 described above is for prohibiting the data recording operation in an area where the moving speed of the film 72 in the early stage of film winding is not stable. The region where the film moving speed is not stable varies depending on the type of the film 72 and the power supply voltage. Therefore, TX has a margin in consideration of fluctuation. In step S622, the performance counter PFC is incremented. In S626, the timer 2 is cleared to detect the film moving speed.

In S628, it is determined whether or not the perforation counter is "16". If it is not "16", the winding of one frame has not been completed, so the flow shifts to S612. When the value is "16", the mode is changed in the processes of S630 and S632.
The data M1 is stopped.

In S634, the CS terminal is set from Low to Hi, and the recording operation of the control IC 25 is stopped. S63
At 6, the film counter FCO is incremented.
In S638, it is determined whether the value of the film counter is EXPn. EXPn is the specified number of frames of the film 72 currently loaded in the camera. There is room for this prescribed number of frames. Therefore, it is possible to shoot more than the specified number of frames. Therefore, the photographing operation is usually performed until the winding operation cannot be performed. However, a problem in photographing until the winding operation cannot be performed is that data of the last frame cannot be recorded on the magnetic track 1a. This is because data is recorded while moving the film. For the above reasons, S
There is a process of 638, the value of the counter is transferred to a subroutine of E If there is a match from XPn "rewind". If they do not match, return. The subroutine "rewind" will be described with reference to FIG.

In S300, the motor M1 is rotated counterclockwise to start the film rewinding operation. S304
Then, a read command is output to the control IC 25. Thereafter, when reproducing the data from the magnetic track 1a, the control IC 25 outputs the data to the D7 to D0 lines. S30
In step 6, E ^{2 is} sent to the register ADRS1. The address data ADEND of the PROM is set. E ² as already explained The data recorded on the magnetic track 1a is stored in the PROM.
Numerical data which is a part of the data is stored. ADEN
D indicates the bottom address of the area where the numerical data is stored. In S308, the address TADn of the program memory is set in the register ADRS2.

As described above, the program memory stores identification data which is a part of data recorded on the magnetic track 1a. TADn indicates the bottom address of the area where the identification data is stored. S
At 310, the error flag ERF is cleared. ERF
Is set when there is an abnormality in the data reproduced from the magnetic track 1a. The setting of the ERF is executed in S316. In S312, a perforation counter PFC
Clear PFC is a photo reflector (WPR)
This is to count the pulse signals output from the signal 69.
When the value of the PFC reaches 16, the rewinding of one frame has been completed. In S314, it is determined whether or not the control IC 25 outputs a latch signal to the DL line. Control IC2
Reference numeral 5 denotes reproduced data D7 to D7 in synchronization with the latch signal.
Output to line 0. If the latch signal has been output, the flow shifts to S316. In S316, a subroutine "comparison" is executed. In this subroutine, it is determined whether there is any abnormality in the data reproduced from the magnetic track 1a. The operation of the subroutine will be described later.

In S318, it is determined whether or not the WRR has output a pulse signal. When a pulse signal is detected, S
If not detected, the process proceeds to S314. In S320, the PFC is incremented. In S322, it is determined whether or not the count value of the PFC has reached 16. When the PFC is 16, it means that the rewinding of one frame has been completed. If not 16, S31
When the number is 4, the processing shifts to S324.

At S324, the state of the ERF is determined.
If there is any abnormality in the reproduction data for one frame, the ERF is set. When the ERF is "1", the flow shifts to S330. In S330, a subroutine "error processing" is executed. The operation of this subroutine will be described later.

When the ERF is "0", the flow shifts to S326. In S326, the film counter FCO is decremented. In S328, the display device 101 displays the number of film frames. In S332, it is determined whether the FCO is 0. If it is not 0, the process moves to S308. In order to determine the reproduction data of the next frame, ADRS2,
Initial setting of ERF and PFC is performed. If FCO is 0, the rewind operation has been completed. In S334, the process waits for 2 seconds to completely store the film 72 in the film cartridge 70. Then, after braking M1 in S336, it is turned off in S338. CS in S340
The line is set from Low to Hi, and the reproduction operation of the control IC 25 is stopped. The subroutine is described below with reference to FIG.
The chin “comparison” will be described.

In S400, D7 to D0 of the control IC 25
Reproduction data is input from the line and set in the register D _rec . In step S402, the data of D _rec is mirror-inverted. The moving direction of the film 72 when recording data is opposite to the moving direction when reproducing. Therefore, it is necessary to reverse the order of the data. For example, when "10100001" is reproduced, it becomes "10000101". Therefore, the mirror must be inverted. However, program memory and E ² The data stored in the PROM is a mirror
If it is inverted, the process of S402 is not required. S40
4, the data of the program memory corresponding to the address set in the register ADRS2 is stored in the register _Dref.
Set to

[0067] In S405, D _ref de of - data is "00"
Is determined. As described above, "00" is set in the address corresponding to the numerical data. D
de of _rec - data is the transition to the S406 when the "00", E ²
Reads numerical data from PROM. And this de to D _ref - to set the data. E ² The address of the PROM is set in the register ADRS1. In S408,
The address of ADRS1 is decremented in preparation for the next operation.

In S405, the data of D _ref is set to “0”.
When the value is other than "0", the address can be used as it is as comparison data. In step S410, the address of ADRS2 is decremented in preparation for the next operation. In step S412, the comparison data between D _rec reproduction data and D _ref is obtained. If they do not match, return is made, and if they do not match, the error flag ERF is set in step S414 and return is made. Will be described.

In S500, it is determined whether or not the register FCO _err matches the film counter FCO. If they match, return immediately. If they do not match, the flow shifts to S502, where the number of frames of the FCO is set to FCO _err.
Set to The reason why the determination in S500 is necessary is that the μCO
This is to prevent M100 from falling into infinite LOOP. In FCO _err , the number of frames having a previous abnormality is stored. The fact that the number of frames in which the abnormality has occurred last time matches the FCO indicates that the recording operation has been performed twice in the same location of the magnetic track 1a. This indicates that data could not be correctly created in both cases. Such a situation occurs due to, for example, a scratch on the magnetic track 1a. In such a case, no matter how many times the recording operation is repeated, data cannot be correctly recorded. Therefore S50
If there is no process of 0, S502, recording and reproduction are repeated indefinitely. In S504, the motor M1 is braked, and in S506, it is turned off. This temporarily stops the rewinding operation. In S508, the CS line of the control IC 25 is set from Low to Hi, and the operation of data reproduction is stopped. In S510 and S512, the display device 101 displays that the recording data has an abnormality for a predetermined time.
For example, it is displayed as shown in FIG. In this example, “13” and “Fr” are alternately displayed on the segment displaying the number of frames.
Displayed for seconds. This indicates that ERROR has occurred in the thirteenth frame. If the camera has a sound element, a warning sound may be generated. In S516, the numerical data of the E ² PROM corresponding to the frame in which the abnormality has occurred is read. In S518, identification data is read from the program memory. Then, in S520, as shown in FIG. 1 5 than two data, synthesizes the transferred data. S522
Then, a store command is output to the control IC 25. S52
In step 4, the combined transfer data is output to the control IC 25.
In S526, the CS line is set from Low to Hi, and the operation in the store mode is stopped. In S528, again
Execute the subroutine "winding up". It has already been described that the operation of data recording is included in “winding”. When the second recording operation is completed, the motor M1 is rotated counterclockwise in S530. Therefore, the rewinding operation starts again. Next, in S532, the control IC 25
Then, a read command is output to start the data reproducing operation, and the process returns.

[0070]

As described above in detail, according to the magnetic recording apparatus for a camera of the present invention, it is possible to judge whether or not data recorded on a magnetic track is accurately recorded for each photographing.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram of a magnetic information control circuit shown in FIG. 1;

FIG. 3 is a time chart of a data recording operation.

FIG. 4 is a time chart of a data reproducing operation.

FIG. 5 is a time chart of a store mode.

FIG. 6 is a time chart of a write mode.

FIG. 7 is a time chart of a lead mode.

FIG. 8 is a view showing a state immediately after a film cartridge is loaded into a camera body.

FIG. 9 is a perspective view showing a state in which the film is wound around a take-up spool.

FIG. 10 is a perspective view showing a state where the film is rewound into the film cartridge.

FIG. 11 is a rear view of the camera without a back cover.

FIG. 12 is a horizontal sectional view of the camera.

FIG. 13 is a perspective view showing a film cartridge.

FIG. 14 is a flowchart for explaining the operation of the main routine.

FIG. 15 is a diagram showing data transferred to a control IC.

FIG. 16 is a character code table based on ASCII codes.

[17] E ² FIG. 3 is a diagram showing data stored in a PROM.

FIG. 18 is a diagram for explaining a method of storing identification data.

FIG. 19 is a flowchart illustrating an operation of a release process.

FIG. 20 is a diagram showing a magnetization state of a magnetic track.

FIG. 21 is a diagram showing another magnetization state of a magnetic track.

FIG. 22 is a flowchart illustrating the operation of the hoisting process.

FIG. 23 is a flowchart illustrating the operation of the rewinding process.

FIG. 24 is a flowchart illustrating the operation of a comparison process.

FIG. 25 is a flowchart illustrating an error processing operation.

FIG. 26 is a diagram illustrating an example of display by the display device.

[Explanation of symbols]

72: film, 100: microcomputer, 10
3 ... Storage device, 116 ... Magnetic information control circuit.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Masahiro Dai, 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside O-Limpus Optical Industry Co., Ltd. (72) Yasuji Toizumi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (56) References JP-A-3-223737 (JP, A) JP-A-63-92937 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 17/24

Claims (3)

(57) [Claims] 1. A camera using a film having a magnetic recording portion as a photosensitive film, comprising: a magnetic recording means for recording data on a magnetic recording portion of the film in response to a film winding operation; A magnetic reading unit for reproducing data recorded in the magnetic recording unit in response to the returning operation; and when the data is recorded by the magnetic recording unit,
Non-volatile storage means for storing the data, and comparison means for comparing the data read by the magnetic reading means with the data stored in the non-volatile storage means during a film rewind operation; based on the comparison result from the means, a magnetic recording apparatus for a camera which is characterized that you comprising: a judgment means for judging whether the data has been recorded successfully, the. 2. The data is normally recorded by the determination means.
If it is determined that no warning has been given, a warning is displayed.
2. A magnetic recording device for a camera according to claim 1, wherein:
Place. 3. The data is normally recorded by the determination means.
If it is determined that the film has not been
Requesting data to be recorded again in the recording unit.
Item 2. A magnetic recording device for a camera according to Item 1.