JPH0922056A - Magnetic recording device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of easily magnetically recording various kinds of data in addition to data on photographing time and photographing format on film. SOLUTION: The data on the photographing format, the photographing time and the characters of a title are inputted in a recording control circuit 62 from a camera control circuit 60 and a time counting circuit 38 before recording the data on the film. As for the data on the photographing format and the photographing time, the inputted data is converted to data for magnetic recording and magnetically recorded by the control circuit 62, and as for the data on the characters of the title, the inputted data is not converted but magnetically recorded as it is.

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.

[0002]

2. Description of the Related Art Conventionally, in addition to recording optical photographic information on a film having a magnetic layer coated on its surface, information such as a shooting date and a photographing format is recorded on the magnetic layer. A camera capable of doing so has been proposed.

[0003]

However, in the above-mentioned camera, the operation control of magnetic recording uses the same circuit as the circuit for controlling the operation of another camera, for example, the film winding operation. Therefore, since the magnetic recording must be performed while the film winding operation is performed, complicated control is required. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a magnetic recording device for a camera that can easily magnetically record data.

[0004]

In order to achieve the above object, the invention of claim 1 is equipped with a film having a magnetic recording portion, and data is recorded in the recording portion in response to exposure of each frame of the film. In a magnetic recording device of a camera having a magnetic recording function for recording, data input means for inputting data relating to exposure, storage means for storing data for recording on a film, and data stored in the storage means for film Recording means for recording above, first storage control means for converting the input data and storing it in the storage means, and second storage for storing the input data in the storage means without conversion. And a control means.

[0005]

In the magnetic recording apparatus for a camera according to claim 1 having the above structure, means for converting input data into data for magnetic recording and recording, and means for recording as it is without conversion are provided. Predetermined data such as time and shooting format can be recorded very easily, and many other types of data such as title data and shutter speed can be recorded on the film relatively easily.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing the internal structure of the first embodiment of the present invention. The film 12 pulled out from the cartridge 10 is wound up by the spool 11.
The spool is belt-driven by a winding motor 16. Perforations 22 are provided on top of the film. The perforations 22 are provided at positions corresponding to both ends of each piece. A photo interrupter 18 for perforation detection is arranged so as to sandwich the upper part of the film. When the film 12 is wound, the position of the film frame is detected by detecting the output of the photo interrupter 18, and the film one frame winding control is performed. Is done. The film 12 is provided with a transparent magnetic layer. Then, when the filming is completed and the film is wound up, data such as a filming time and a filming format are magnetically recorded in a portion 20 below the frame imaged by the magnetic head 19. Film 12 is on top of film 12
A roller 13 that is pressed against and rotates according to the movement of the film 12 is arranged above the photographing frame. The rotating roller 13 transmits a rotating force to the rotating plate 14. The rotary plate 14 is provided with a large number of holes (not shown) along the circumference. The movement amount of the film is detected by detecting the hole portion by the film photo interrupter 15, and the magnetic recording timing is controlled.

FIG. 2 is a block diagram showing the configuration of the first embodiment of the present invention. Reference numeral 35 is a camera control circuit for controlling camera operations such as exposure and winding, and is composed of a microcomputer. Reference numeral 42 is a recording control circuit for magnetically recording data such as photographing time on the film. Communication with the camera control circuit 35 is performed through the signal lines WRITE, FMT1 and FMT2. Reference numeral 30 is an exposure control device. The exposure of the film is controlled by an instruction from the camera control circuit 35. Reference numeral 31 is a film winding device for winding a film. Reference numeral 32 is a selection circuit for selecting a shooting format. Three types of shooting formats, H, L, and P, can be selected. H format is 9:16, L format is 2: 3, P
When formatted, a print with an aspect ratio of 1: 3 can be obtained.

Reference numeral 33 is a circuit for detecting film perforation, which waveform-shapes the output of the perforation detecting interrupter 18 and outputs it as a perforation pulse (PP) to the camera control circuit 35. "L" is output in the perforation part. Reference numeral 34 is a circuit for waveform-shaping the output of the photo interrupter 15 for detecting the film movement amount and outputting a film movement pulse (FMP) to the camera control circuit 35 and the recording control circuit 42. It is configured to generate 250 pulses for the movement of one frame of film. 38 is a clock circuit. Recording control circuit 4
The data of time (year, month, day, hour, minute) is output to 2.
Reference numeral 36 is a display device for displaying the time measured by the clock circuit 38, and is composed of an LCD. Reference numeral 37 denotes a magnetic head for performing magnetic recording on the film, which is driven by the recording control circuit 42 by the signal line HE.
Reference numeral 39 is a memory provided in the recording control circuit 42.
This is for storing shooting time data, shooting format data, etc. prior to magnetic recording on film, and has a storage capacity of 7 bytes.

In response to an instruction from the camera control circuit 35, the recording control circuit 42 magnetically records the contents of the memory 39 on the film in synchronization with the film movement pulse. Reference numeral 40 indicates to the recording control unit 42 the loading direction of the film cartridge, that is, whether the film cartridge is loaded on the right side or on the left side when viewed from the viewfinder eyepiece side of the camera. It is a switch SLD for notifying. The camera of this embodiment is a type of camera mounted on the left side of the camera.

FIG. 3 is a diagram showing the positional relationship between the loaded film, the photo interrupter for perforation detection, and the magnetic head in the first embodiment of the present invention, and the relationship between the film moving pulse and the magnetic recording area. The photo interrupter for detecting the perforation is located in the perforation part on the side of the next frame out of the two perforations located on the upper and left sides of the upper part of the current frame in the photographable state. It is located in the middle of the piece. Further, the film moving pulse is configured to generate 250 pulses for winding one frame of film. An area for recording magnetic data such as a photographing time with a laboratory is determined. A portion separated by 20 or more film movement pulses from the central portion between the frames corresponds to the area. Therefore, magnetic recording is possible for 210 pulses from the time when 20 film movement pulses are generated after the film feeding is started.

FIG. 4 is a diagram showing data recorded on the film in the first embodiment of the present invention. First, start data SD indicating that data recording is started is recorded, followed by time data (identification data, year data, month data, day data, hour data, minute data), format data F.
MT (identification data, shooting format data, data indicating the loading direction of the cartridge) is repeatedly recorded three times, and finally end data ED indicating the end of the data is recorded. Start data S recorded on the film
The D, the end data ED, the time data, and the format data FMT are coded in the recording control circuit 42 and recorded on the film.

The start data SD and the end data ED are each 1-byte data. The time data consists of identification data, year data, month data, day data, hour data, and minute data. Each data length is 1 byte, total 6
Bytes. The format data FMT is composed of identification data, shooting format data, and data indicating the loading direction of the cartridge, and the data length of the three data is 1 byte. The data length excluding the start data SD and the end data ED is 7 bytes, which is the same as the storage capacity of the memory 39 described above. Since the address of each data in the memory 39 is matched with the order of the data at the time of magnetic recording, only the data in the memory 39 need be read out sequentially from the end at the time of actual magnetic recording, which simplifies the recording control.

The total data length is 1+ (6 + 1) * 3 + 1 = 23 bytes = 184 bits, which is 1 every time a film moving pulse is generated.
By recording bit by bit, it is possible to record within the above-mentioned data recording range (210 pulses).

FIG. 5 is a flow chart showing the operation of the camera controller 35 during magnetic recording in the first embodiment of the present invention. When release is instructed by a release button (not shown), exposure is performed (# 100). When the exposure ends, the FMT1, based on the shooting format selected
Output "H" or "L" to FMT2 (# 110),
Then, "L" is output to WRITE (# 120). Then, the film winding is started (# 130). In # 110, the relationship between the shooting format and FMT1,2 is FMT1,2 = “L, L”, L when the H format is used.
In the case of format, it is "H, L", and in the case of P format, it is "L, H".

The film moving pulse is counted during winding, and when the film moving pulse reaches 20 pulses, FM
Set both T1 and T2 to "H"(# 140, # 15
0). When the film moving pulse reaches 230 pulses, WRITE is set to "H"(# 160, # 17).
0). Then, the signal P from the perforation detection circuit
It is determined whether or not P is "L"(# 180), and "L"
Then, the film feeding is stopped (# 190), and the operation is completed.

FIG. 6 is a flow chart showing the operation of the recording control circuit 42 in the first embodiment of the present invention. When the power is turned on, the switch SLD is first read to determine the loading direction of the cartridge, and the data for magnetic recording is set in the loading direction data portion in the FMT data of the memory 39 (# 300). And WRITE
Is waited until it becomes "L"(# 310), and when it becomes "L", the time at that time is input and the data for magnetic recording is set in the time data section of the memory 39 (# 3).
20). Next, input FMT1 and 2, and input FMT
The photographing format is determined based on the combination of the states 1 and 2, and the data for magnetic recording is set in the photographing format data portion in the FMT data of the memory 39 (# 330). Then, it waits for both FMT1 and 2 to become "H"(# 340).

When both of them become "H", the head is driven and first, start data SD indicating the start of data recording is recorded (# 350). Then, subsequently, the magnetic recording data set in the memory 39 is repeatedly read three times while being read from the memory 39 (# 360, # 370,
# 380), end data ED indicating the end of data recording
Is recorded (# 390). And WRITE is "H"
It is determined whether or not (# 400), and if it is "H", it means that all the data has not been recorded within the recording range, so that the LCD is blinked and a warning is displayed (# 41).
0). If WRITE is not "H", WRITE is "
Wait until it becomes "H"(# 420), and when it becomes "H", #
Return to 310 and wait until WRITE becomes "L" again.

FIG. 7 is a diagram showing the signal timing of each part during magnetic recording in the first embodiment of the present invention. W
FMT1 and FMT2 when RITE becomes "L"
The shooting format information is determined by the combination of the states. The magnetic recording start timing is indicated by the fact that both FMT1 and FMT2 become "H" at the time when 20 pulses of the film moving pulse FMP are output from the start of winding. Magnetic recording is performed from the start of recording to 184 pulses of the film moving pulse FMP. When the film movement pulse reaches 210 pulses from the start of magnetic recording, it indicates the end of the magnetic recording range, so WRITE is "H".
become. And "L" of perforation pulse PP
Stops the film winding. The relationship between the perforation pulse PP at the time of winding and the film moving pulse is almost constant, and the perforation pulse P is between the start of winding and the end of magnetic recording.
P is always "L" once. Therefore, the completion of the winding of one frame is determined by detecting "L" of the perforation pulse PP at the end of the magnetic recording.

Next, a second embodiment of the present invention will be described. The camera of the second embodiment is capable of recording title characters of up to 6 characters for the frames photographed. The parts having the same functions as those of the first embodiment are designated by the same symbols and the same numbers, and the description thereof is omitted. FIG. 8 is a schematic diagram showing the internal structure of the second embodiment of the present invention. Two magnetic recording heads 51
Magnetic recording on the channel is possible. As in the first embodiment, two tracks (52, 53) are magnetically recorded on the lower part of the photographing frame. The rotating roller 13, the rotating plate 14, and the photo interrupter 15 are basically the same as those in the first embodiment.
However, in the second embodiment, the rotary plate 14 is slightly smaller than that of the first embodiment due to the miniaturization of the camera. Since the other parts are the same as those in the first embodiment, the description thereof will be omitted.

FIG. 9 is a block diagram showing the configuration of the second embodiment of the present invention. Reference numeral 60 denotes a camera control circuit for controlling camera operations such as exposure and winding, which is composed of a microcomputer. Reference numeral 62 denotes a recording control circuit for magnetically recording data such as a photographing time on a film. Communication with the camera control circuit 60 is performed through the signal lines WRITE, SCK and SOUT. A title input device 61 is composed of a plurality of keyboards. 63 and 64 are magnetic recording heads. Driven by the signal lines HE1 and HE2 by the recording control circuit 62, the head 1 records the data such as the photographing time and the photographing format on the upper and inner tracks of the two tracks, and the head 2 records the title character on the lower track. It Reference numeral 65 denotes a memory provided in the recording control circuit, which stores data to be recorded by the magnetic head 1. Reference numeral 66 denotes a memory provided in the recording control circuit, which stores data to be recorded by the magnetic head 2. The storage capacity of each of the memories 65 and 66 is 8 bytes.

The film movement amount detection circuit 42 has the same construction as that of the first embodiment, but the number of movement pulses generated with respect to the movement amount of the film is reduced by the size of the rotating plate 14 and thus per film frame. 200 film movement pulses (FMP) are generated for each movement. Reference numeral 71 denotes a pulse conversion circuit, which changes the pulse period when the film movement pulse generated when winding one frame of film is different from the number of pulses used in the recording control circuit 62 (250 pulses per one frame). By creating 250 pulses per frame and inputting them to the recording control circuit 62, they can be used for a plurality of cameras having different film movement pulse amounts per frame. , Pulse generator 6
7, a memory 68, a pulse measuring unit 69, and a conversion coefficient input switch (SPL) 70. The measuring unit 69 measures the period of the input film moving pulse (FMP) and creates a pulse having a required period according to the conversion coefficient (1.25 in this embodiment) designated by the switch 70. The time data for the operation is stored in the memory 68. The pulse creating unit 67 creates a pulse based on the time data stored in the memory 68 and inputs it to the recording control circuit 62.

FIG. 10 is a diagram showing data recorded on the film in the second embodiment of the present invention. FIG.
10A shows the data recorded on the film by the magnetic head 1, and FIG. 10B shows the data recorded on the film by the magnetic head 2. In the head 1, first, start data SD indicating that data recording is started is recorded, then time data, format data FMT and dummy data DD are repeatedly recorded three times, and finally end data ED indicating the end of data is recorded. Will be recorded. Dummy data is data in which all bits in the data are "1" and has no meaning in the agreement with the laboratory. In the head 2, first, start data SD indicating that data recording is started is recorded, then title data is repeatedly recorded three times, and finally end data ED indicating the end of data is recorded.

The start data SD and the end data ED are each 1-byte data. The time data is composed of identification data indicating that it is time data, year data, month data, day data, hour data, and minute data. Each data length is 1 byte, totaling 6 bytes. The format data FMT includes identification data, shooting format data, and data indicating the cartridge loading direction.
The data length is 1 byte. The title data is composed of identification data indicating the beginning of the title data, character data, and identification data indicating the end of the title data. The identification data is 1 byte, and the character data is 1 byte per character, so there are 6 characters. is there. In the data recorded by the head 1, time data and format data F
By recording 1-byte dummy data DD in addition to MT, the length of data recorded by the heads 1 and 2 is the same and is the same as that of the memories 1 and 2 (65, 66).
Since it is a byte, both heads start recording at the same time, the stored contents of the memories 1 and 2 (65, 66) are simply read simultaneously from the ends to drive the heads 1 and 2, and the recording can be ended at the same time. It will be easy.

All the data recorded by the head 1 is encoded into magnetic recording data in the recording control circuit 62 and stored in the memory 1 (65). The data recorded by the head 2 is encoded in the recording control circuit 62 as the start data SD and the end data ED, but the other data is the data transmitted from the camera control circuit 60 as it is in the memory 2 (66). And record it on the film.
Since the data structure to be recorded is managed by the camera control circuit side, it is possible to transmit the coded data for magnetic recording from the camera control circuit without providing the recording control circuit 62 with means for coding many kinds of data. By doing so, data other than title data such as shutter speed and aperture value can be recorded.

The total data length recorded by the heads 1 and 2 is 1 + 8 * 3 + 1 = 26 bytes = 208 bits, which is 1 every time a film moving pulse is generated.
By recording bit by bit, it is possible to record within the above-mentioned data recording range (210 pulses).

FIG. 10 (c) is a diagram showing recorded data when the number of title characters to be recorded is four. By recording 2 bytes of dummy data DD after the identification data indicating the end of the title data to make the apparent title data length 8 bytes, the same data length will be obtained even if the number of title characters changes, and it will be recorded with simple control. It is possible.
The dummy data DD in this case is added by the camera control circuit 60 and is input from the camera control circuit 60 together with the title data. In this case, the data length of data transmission regarding the data recorded by the head 2 is always 8 bytes.

The dummy data DD is recorded in the recording control circuit 62.
May be added. In this case, since the camera control circuit 60 only needs to transmit data other than the dummy data DD, it is possible to shorten the data length of data transmission. The recording control circuit 62 preliminarily stores all of the memory 2 (66).
It can be easily added by setting it to "1" and storing the data inputted from that time by the data inputted from the first address of the memory 2 (66).

FIG. 11 is a flow chart showing the operation of the camera control device 60 during magnetic recording in the second embodiment of the present invention. When release is instructed by a release button (not shown), exposure is performed (# 510). When the exposure is completed, "L" is output to WRITE (# 520) to notify the recording control circuit 62 that the serial data transmission is started. Then, a serial clock for serial communication is output to the signal line SCK, and shooting format data and title character data are serially output (# 530). At this time, as the title character data, the same data as the data magnetically recorded on the film is transmitted. As the photographing format data, the data agreed between the camera control circuit 60 and the recording control circuit 62 is transmitted. When the serial communication is completed, film winding is started (# 540).

The film moving pulse is counted during winding, and when the film moving pulse FMP reaches 20 pulses, WRITE is set to "H"(# 550, # 560).
And when the film movement pulse reaches 230 pulses, W
RITE is set to "L"(# 570, # 580). Then, the signal PP from the perforation detection circuit PD is "
It is determined whether or not it is L "(# 590), and when it is" L ", the film feeding is stopped (# 600), and WRIT
The E is set to "H"(# 610), and the operation ends.

FIG. 12 is a flow chart showing the operation of the recording control circuit 62 in the second embodiment of the present invention.
When the power is turned on, the switch SLD is first read to determine the cartridge loading direction, and the memory 1
Data set for magnetic recording is performed in the loading direction data portion in the FMT data of (65) (# 700). And W
Wait for RITE to become "L"(# 710), then "L"
Then, the data is serially input from the camera control circuit 42 and stored (# 720). With respect to the input shooting format data, the shooting format is determined, and data for magnetic recording is set in the shooting format data portion in the FMT data of the memory 1 (65). The title character data is stored in the memory 2 (66) as it is. Next, input the time at that point from the clock circuit, and enter the memory 1 (6
Data for magnetic recording is set in the time data section of 5) (# 725). Then, it waits until WRITE becomes "H"(# 730).

When WRITE becomes "H", head 1,
2 is started at the same timing, and start data SD indicating the start of data recording is recorded (# 740). Then, subsequently, the magnetic recording data set in the memory 1 (65) and the memory 2 (66) are repeatedly recorded three times at the same timing (# 750, # 760), and the end data ED indicating the end of the data recording is obtained. Recording is performed at the same timing with both heads (# 770). And WRITE is "
Wait until it becomes L ”(# 780), then wait until WRITE becomes“ H ”(# 790).
Return to step # 710.

FIG. 13 is a diagram showing the timing of signals at various parts during magnetic recording in the second embodiment of the present invention.
After WRITE becomes “L”, serial data transmission is performed. After that, winding is started, and when 20 film movement pulses FMP are generated, WRIT
E changes to "H", and the start of magnetic recording is instructed. Data recording is performed with 208 pulses from the start of recording. When the film moving pulse FMP reaches 210 pulses from the start of recording and exceeds the magnetic recording range, WRITE becomes “L”, and when the perforation pulse becomes “L”, winding is completed and WRITE becomes “H” again.

FIG. 14 is a flow chart showing the operation of the pulse measuring section 69 of the pulse conversion circuit 71 in the second embodiment of the present invention. When the power is turned on, the state of the switch SPL (70) is first input (# 1010), and the conversion coefficient (X) of the pulse period is calculated (# 1020). The relationship between the state of the switch SPL (70) and the conversion coefficient is predetermined. In this embodiment, since 200 pulses are converted into 250 pulses, the conversion coefficient is 1.25. After that, a timer (not shown) is reset and started (# 103
0), waiting for the film moving pulse FMP to change from "H" to "L"(# 1040). When it changes from "H" to "L", the timer data T1 is read (# 1050), multiplied by the conversion coefficient (X) and divided by 2 (# 1060), and the obtained data T2 is stored in the memory 68 (# 107).
0). Then, the process returns to # 1030 and the above operation is repeated.

FIG. 15 is a flow chart showing the operation of the pulse generator 67 of the pulse conversion circuit 71 in the second embodiment of the present invention. When the power is turned on, the data T2 is input from the memory 68 (# 1110). Then, the data T2 input to the down count timer (not shown) is set and started (# 1120), and the timer is waited until it reaches 0 (# 1130). When the timer reaches 0, "L" is output to the recording control circuit 62 (# 1140). Then, the data T2 is input again from the memory 68 (# 115
0), set the data T2 input to the down-count timer (not shown), start (# 1160), and wait for the timer to reach 0 (# 1170). When the timer reaches 0, "H" is output to the recording control circuit 62 (# 118
0), and returns to # 1110.

According to the flow chart described in FIG. 15, the pulse creating unit creates the pulse based on the data set in the memory 68 even when the film moving pulse FMP is not generated, but the recording control circuit 62 is used. Does not cause magnetic recording unless magnetic recording is instructed from the camera control unit 60, so there is no particular problem. Further, the power source of the pulse conversion circuit 71 may be interlocked with the film winding operation.

[0036]

As described above, according to the present invention, the predetermined data such as the photographing time and the photographing format can be recorded very easily, and a large number of other kinds of data such as title data and shutter speed can be recorded. Data can be recorded on the film relatively easily.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an internal structure of a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a first exemplary embodiment of the present invention.

FIG. 3 is a diagram showing a positional relationship between a loaded film, a photo interrupter for perforation detection, and a magnetic head, and a relationship between a film moving pulse and a magnetic recording area in the first embodiment of the present invention.

FIG. 4 is a diagram showing data recorded on a film in the first embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of the camera control device 35 at the time of magnetic recording in the first embodiment of the present invention.

FIG. 6 is a recording control circuit 4 according to the first embodiment of the present invention.
6 is a flowchart showing the operation of No. 2.

FIG. 7 is a diagram showing the signal timing of each part during magnetic recording in the first embodiment of the present invention.

FIG. 8 is a schematic diagram showing the internal structure of the second embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 10 is a diagram showing data recorded on a film in the second embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of the camera control device at the time of magnetic recording in the second embodiment of the present invention.

FIG. 12 is a flowchart showing the operation of the recording control circuit in the second embodiment of the present invention.

FIG. 13 is a diagram showing the signal timing of each part during magnetic recording in the second embodiment of the present invention.

FIG. 14 is a flowchart showing an operation of a pulse measuring unit of the pulse conversion circuit in the second embodiment of the present invention.

FIG. 15 is a flow chart showing an operation of a pulse creation unit of the pulse conversion circuit in the second embodiment of the present invention.

[Explanation of symbols]

 34 ... Film movement amount detection circuit 35 ... Camera control circuit 37 ... Magnetic recording head 38 ... Timing circuit 40 ... Switch SLD 42 ... Recording control circuit

Claims (1)

[Claims] 1. A magnetic recording device for a camera, which is equipped with a film having a magnetic recording portion, and which has a magnetic recording function for recording data in the recording portion in response to exposure of each frame of the film, Data input means for inputting data, storage means for storing data to be recorded on the film, recording means for recording the data stored in the storage means on the film, and converting the input data A magnetic recording device for a camera, comprising: first storage control means for storing in the storage means; and second storage control means for storing the input data in the storage means without conversion. .