JP3333895B2 - Camera and magnetic recording device for camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera and a magnetic recording device for the camera. In particular, the present invention relates to a magnetic recording device that records data such as a photographing time during film feeding, and a camera including the magnetic recording device.

[0002]

2. Description of the Related Art Conventionally, a film having a surface coated with a magnetic layer is used. In addition to recording optical photographic information on the film, information such as a date at the time of photographing and a photographing format are recorded on the magnetic layer. A possible camera has been proposed. In these, time data is input from a timing circuit when a picture is taken, and the input time data is coded according to a predetermined rule and recorded on a film. In such a camera, the recording timing of each data of the magnetic recording is such that a pulse corresponding to the rotation speed of a roller or the like rotating in association with the movement of the film is generated, and the magnetic recording is performed in synchronization with the pulse.

[0003]

When the apparatus for magnetic recording is incorporated in a plurality of types of cameras, the area for magnetic recording on a film is determined by a standard. There is a need. However, as described above, when a pulse corresponding to the movement of the film is generated and the magnetic recording is performed in synchronization with the pulse,
In general, it is difficult for all cameras to obtain the same number of pulses during a predetermined amount of film feeding because the design conditions differ from camera to camera. Further, if it is attempted to satisfy the above-mentioned standard in all of a plurality of cameras that generate pulses of different numbers, the magnetic recording area becomes narrow and the amount of magnetically recordable data decreases. The present invention has been made in order to solve the above-described problems, and has been made in view of a plurality of cameras that generate different numbers of pulses for a predetermined amount of film feeding without reducing the capacity of magnetic recording. An object of the present invention is to provide a magnetic recording device of a camera that can be incorporated. Another object is to provide a camera provided with such a magnetic recording device.

[0004]

According to a first aspect of the present invention, a film having a magnetic recording portion is mounted, and the recording portion is exposed to light corresponding to each frame of the film. In a magnetic recording device of a camera having a magnetic recording function of recording data in accordance with a standard , a pulse input means for inputting a first pulse signal generated in accordance with a movement of a film; Predetermined signal input means, and the first pulse signal input by the pulse input means, based on the predetermined signal input by the signal input means,
Cycle different and in synchronization with the first pulse signal, the Standard
Conversion means for converting into a second pulse signal that satisfies the following condition, and recording means for recording the data relating to the exposure on the film in synchronization with the second pulse signal converted by the conversion means when the film is wound up. Things. According to a second aspect of the present invention, there is provided a camera provided with a magnetic recording device which is mounted with a film having a magnetic recording portion and records data relating to exposure on the recording portion in accordance with the standard in accordance with exposure of each frame of the film. Pulse input means for inputting a first pulse signal generated in accordance with the movement of the film, predetermined signal input means determined for each camera to satisfy the above standard, and input by the pulse input means The first pulse signal is synchronized with the first pulse signal based on a predetermined signal input by the signal input means, and the second pulse signal satisfies the second standard .
And a recording means for recording the exposure data on the film in synchronization with the second pulse signal converted by the conversion means when the film is wound up.

[0005]

According to the above construction, the input pulse is converted into a predetermined number of pulses and the magnetic recording is performed in synchronization with the converted pulse, so that the magnetic recording capacity is not reduced.
It is possible to provide a magnetic recording device that can be assembled with a plurality of cameras. Further, it is possible to provide a camera provided with such a magnetic recording device.

[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 of the cartridge 10 is taken up by a spool 11.
The spool is belt-driven by a hoist motor 16. A perforation 22 is provided on the upper part of the film. The perforations 22 are provided at positions corresponding to both ends of each frame. A photo interrupter 18 for perforation detection is arranged so as to sandwich the upper portion of the film. When the film 12 is wound, the frame position of the film is detected by detecting the output of the photo interrupter 18 and the film is wound up by one frame. Is performed.

The film 12 is provided with a transparent magnetic layer. When the film is wound up after the photographing is completed, data such as photographing time and photographing format are magnetically recorded in a portion 20 below the frame photographed by the magnetic head 19. A roller 13 that is pressed against the film 12 and rotates in accordance with the movement of the film 12 is arranged above the film 12 above the film 12. The rotating roller 13 transmits a rotating force to the rotating plate 14. Rotating plate 1
4 has a large number of holes (not shown) along the circumference. By detecting the hole by the film photointerrupter 15, the amount of movement of the film is detected, and the timing of magnetic recording is controlled.

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

Reference numeral 33 denotes a circuit for detecting the perforation of the film. The output of the perforation detection interrupter 18 is shaped into a waveform, and is output to the camera control circuit 35 as a perforation pulse (PP). It is configured such that "L" is output at the perforation portion. Numeral 34 denotes a circuit for shaping the waveform of the output of the photo-interrupter 15 for detecting the amount of film movement 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 movement of one frame of the film. 38 is a timing circuit. Recording control circuit 4
2 outputs time (year, month, day, hour, minute) data.
Reference numeral 36 denotes a display device for displaying the time measured by the clock circuit 38, which is constituted by 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 through the signal line HE.
Reference numeral 39 denotes a memory provided in the recording control circuit 42.
This is for storing photographing time data, photographing format data, and the like prior to magnetic recording on film, and has a storage capacity of 7 bytes.

The recording control circuit 42 performs magnetic recording of the contents of the memory 39 on the film in synchronization with the film movement pulse in accordance with an instruction from the camera control circuit 35. Reference numeral 40 indicates to the recording control unit 42 the direction in which the film cartridge is to be loaded, that is, whether the film cartridge is a camera that is loaded on the right side or a camera that is loaded on the left side when viewed from the viewfinder eyepiece side of the camera. This is a switch SLD for notifying. The camera of the present embodiment is of a type that is mounted on the left side of the camera.

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

FIG. 4 is a diagram showing data recorded on a film in the first embodiment of the present invention. First, start data SD indicating that data recording starts is recorded, followed by time data (identification data, year data, month data, day data, hour data, minute data), and format data F.
MT (identification data, photographing format data, data indicating the loading direction of the cartridge) is repeatedly recorded three times, and end data ED indicating the end of the data is recorded last. Start data S recorded on film
D, end data ED, time data, and format data FMT are encoded in the recording control circuit 42 and recorded on a 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, for a total of 6 bytes.
Bytes. The format data FMT is composed of identification data, photographing format data, and data indicating the direction in which the cartridge is loaded. The data length of the three data is one 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 matches the order of the data at the time of magnetic recording, at the time of actual magnetic recording, it is only necessary to read out the data in the memory 39 sequentially from the end, and the recording control is simplified.

The total data length is 1+ (6 + 1) * 3 + 1 = 23 bytes = 184 bits, and becomes 1 every time one film movement pulse is generated.
By recording bit by bit, it is possible to record within the above-described data recording range (for 210 pulses).

FIG. 5 is a flowchart showing the operation of the camera control device 35 during magnetic recording in the first embodiment of the present invention. When a release is instructed by a release button (not shown), exposure is performed (# 100). When the exposure is completed, FMT1 and FMT1 are set based on the selected shooting format.
"H" or "L" is output to FMT2 (# 110),
Subsequently, "L" is output to WRITE (# 120). Then, winding of the film is started (# 130). In the above-mentioned # 110, the relationship between the photographing format and FMT1 and FMT2 is HMT when FMT1,2 = “L, L”, L
The format is "H, L", and the format is "L, H".

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

FIG. 6 is a flowchart showing the operation of the recording control circuit 42 in the first embodiment of the present invention. When the power is turned on, first, the switch SLD is read, the loading direction of the cartridge is determined, and data for magnetic recording is set in the loading direction data portion in the FMT data of the memory 39 (# 300). And WRITE
Waits for "L" to become "L"(# 310). When it becomes "L", the time at that time is input from the timing circuit, and data for magnetic recording is set in the time data part of the memory 39 (# 3).
20). Then, input FMT1 and FMT2, and
The photographing format is determined based on the combination of the states 1 and 2, and data for magnetic recording is set in the photographing format data section in the FMT data of the memory 39 (# 330). Then, it waits until both FMT1 and FMT2 become "H"(# 340).

When both become "H", the head is driven, and first, start data SD indicating the start of data recording is recorded (# 350). Subsequently, the magnetic recording data set in the memory 39 is repeatedly recorded three times while reading 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 the data has been recorded (# 400). If "H", it means that all data has not been recorded in the recording range, and the LCD is blinked to display a warning (# 41).
0). If WRITE is not "H", WRITE is "
Wait until it becomes "H"(# 420), and when it becomes "H", #
The process returns to 310 and waits until WRITE becomes "L" again.

FIG. 7 is a diagram showing signal timings of various parts 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. Then, the magnetic recording start timing is instructed by the fact that both FMT1 and FMT2 become "H" at the time when 20 pulses are output from the start of winding of the film movement pulse FMP. Magnetic recording is performed from the start of recording until the film movement pulse FMP reaches 184 pulses. When the film movement pulse reaches 210 pulses from the start of magnetic recording, WRITE is set to "H" to indicate the end of the magnetic recording range.
become. Then, the "L" of the perforation pulse PP
Stops the winding of the film. The relationship between the perforation pulse PP at the time of winding and the film movement pulse is substantially constant, and the perforation pulse P is not changed from the start of winding to the end of magnetic recording.
P always becomes "L" once. Accordingly, 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. In the camera of the second embodiment, up to six title characters can be recorded with respect to the photographed frame. Portions having the same functions as those in the first embodiment are denoted by the same reference numerals and numbers, and description thereof is omitted. FIG. 8 is a schematic diagram showing the internal structure of the second embodiment of the present invention. The magnetic recording head 51 is 2
Magnetic recording in a channel is possible. As in the first embodiment, two tracks (52, 53) are magnetically recorded below the photographic 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 rotating plate 14 is slightly smaller than the first embodiment in order to reduce the size of the camera. The other parts are the same as in the first embodiment, and the description is 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, and is constituted by a microcomputer. Reference numeral 62 denotes a recording control circuit for magnetically recording data such as a photographing time on a film. The communication with the camera control circuit 60 is performed through the signal lines WRITE, SCK, and SOUT. Reference numeral 61 denotes a title input device, which includes 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, data such as a photographing time and a photographing format are recorded by the head 1 on the upper one of the two tracks, and the title characters are recorded on the lower track by the head 2. You. A memory 65 provided in the recording control circuit 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 moving amount detecting circuit 42 has the same construction as that of the first embodiment, but the number of moving pulses generated with respect to the moving amount of the film is reduced by the reduced size of the rotating plate 14, so that the number of moving pulses per one frame of the film is reduced. 200 pulses of film movement pulse (FMP) are generated for the movement of. Reference numeral 71 denotes a pulse conversion circuit which changes the pulse period when the film movement pulse generated when the film is wound up by one frame is different from the number of pulses (250 pulses per frame) used by the recording control circuit 62. By generating 250 pulses per frame and inputting them to the recording control circuit 62, it 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 cycle of the input film movement pulse (FMP) and generates a pulse having a required cycle according to the conversion coefficient (1.25 in this embodiment) specified by the switch 70. Is stored in the memory 68. The pulse creating section 67 creates a pulse based on the time data stored in the memory 68 and inputs the created pulse to the recording control circuit 62.

FIG. 10 is a diagram showing data recorded on a 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, start data SD indicating that data recording starts is recorded, then time data, format data FMT, and dummy data DD are repeatedly recorded three times, and end data ED indicating the end of data is finally recorded. Be recorded. Dummy data is data in which all bits in the data are "1" and have no meaning in agreement with the laboratory. The head 2 first records start data SD indicating that data recording starts, then repeatedly records title data three times, and finally records end data ED indicating the end of data.

The start data SD and the end data ED are each 1-byte data. The time data is composed of identification data indicating time data, year data, month data, day data, hour data, and minute data. Each data length is 1 byte, that is, 6 bytes in total. The format data FMT includes identification data, photographing format data, and data indicating the direction in which the cartridge is loaded.
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. is there. In the data recorded by the head 1, time data and format data F
By recording the dummy data DD of 1 byte in addition to the MT, the length of the data recorded by the heads 1 and 2 is the same and the same as that of the memories 1 and 2 (65, 66).
Since the recording is started in both heads, recording is started simultaneously from both heads, and the contents stored in the memories 1 and 2 (65, 66) are simply read out simultaneously from the ends to drive the heads 1 and 2 and the recording can be completed simultaneously. It's easy.

All 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, while the start data SD and the end data ED are encoded in the recording control circuit 62. For the other data, the data transmitted from the camera control circuit 60 is used as it is in the memory 2 (66). And record it on film.
Since the data structure to be recorded is managed by the camera control circuit, the camera control circuit transmits the coded data for magnetic recording without providing the recording control circuit 62 with a means for coding a large number of types 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, and becomes 1 every time one film movement pulse is generated.
By recording bit by bit, it is possible to record within the above-described data recording range (for 210 pulses).

FIG. 10C is a diagram showing recording data when the number of title characters to be recorded is four. The dummy data DD of 2 bytes is recorded after the identification data indicating the end of the title data, and the apparent title data length is set to 8 bytes, so that even if the number of title characters changes, the data length becomes the same, and recording is performed by simple control. It is possible.
In this case, the dummy data DD 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 for data to be recorded by the head 2 is always 8 bytes.

The dummy data DD is stored 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, the data length of the data transmission can be reduced. The recording control circuit 62 stores all of the memory 2 (66) in advance.
This can be easily added by setting the data to 1 "and storing the data input from the first address of the memory 2 (66) by the amount of data input.

FIG. 11 is a flowchart showing the operation of the camera control device 60 during magnetic recording in the second embodiment of the present invention. When a 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 transmission of data in serial is started. Then, a serial clock for serial communication is output to the signal line SCK, and photographing 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 shooting format data, data determined between the camera control circuit 60 and the recording control circuit 62 is transmitted. When the serial communication is completed, winding of the film is started (# 540).

The film movement pulse is counted during winding, and when the film movement pulse FMP reaches 20 pulses, WRITE is set to "H"(# 550, # 560).
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 becomes “
L is determined (# 590), and when it becomes "L", the film feeding is stopped (# 600), and WRIT is performed.
E is set to "H"(# 610), and the operation ends.

FIG. 12 is a flowchart 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 loading direction of the cartridge.
The data set for magnetic recording is performed on the loading direction data portion in the FMT data of (65) (# 700). And W
Wait for RITE to become “L” (# 710),
Then, data is serially input from the camera control circuit 42 and stored (# 720). The input photographing format data is subjected to the discrimination of the photographing format, and data for magnetic recording is set in the photographing format data section in the FMT data of the memory 1 (65). The title character data is stored in the memory 2 (66) as it is. Next, the time at that time is input from the timing circuit, and the time is stored in the memory 1 (6
The 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). 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 recorded. Recording is performed at the same timing for both heads (# 770). And WRITE is
Waiting for L to become "L"(# 780), and then to "L", then waiting for WRITE to become "H"(# 790)
Return to # 710.

FIG. 13 is a diagram showing the timing of signals of 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 pulses of the film movement pulse FMP are generated, WRIT is performed.
E changes to "H" to instruct the start of magnetic recording. Data recording is performed in 208 pulses from the start of recording. When the film movement pulse FMP reaches 210 pulses from the start of recording and exceeds the magnetic recording range, WRITE goes to "L". Thereafter, when the perforation pulse goes to "L", winding is finished and WRITE goes to "H" again.

FIG. 14 is a flowchart 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, first, the state of the switch SPL (70) is 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. Thereafter, the timer (not shown) is reset and started (# 103).
0), and waits for the film movement pulse FMP to change from "H" to "L"(# 1040). When the level changes from "H" to "L", the timer data T1 is read (# 1050), multiplied by 2 with the conversion coefficient (X) (# 1060), and the obtained data T2 is stored in the memory 68 (# 107).
0). Then, returning to step # 1030, the above operation is repeated.

FIG. 15 is a flowchart showing the operation of the pulse generator 67 of the pulse converter 71 in the second embodiment of the present invention. When the power is turned on, 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 waits until the timer becomes 0 (# 1130). When the timer reaches 0, "L" is output to the recording control circuit 62 (# 1140). Then, the data T2 is inputted again from the memory 68 (# 115
0), the data T2 input to a down-count timer (not shown) is set and started (# 1160), and waits until the timer reaches 0 (# 1170). When the timer reaches 0, "H" is output to the recording control circuit 62 (# 118).
0), returning to # 1110.

According to the flowchart described with reference to FIG. 15, even when the film movement pulse FMP is not generated, the pulse generator generates a pulse based on the data set in the memory 68. No magnetic recording is performed unless there is an instruction from the camera control unit 60 to start magnetic recording, so there is no particular problem. Further, the power supply of the pulse conversion circuit 71 may be linked to the film winding operation.

[0037]

As described above, according to the present invention, the present invention can be incorporated into a plurality of cameras that generate different numbers of pulses for a predetermined amount of film feeding without reducing the capacity of magnetic recording. A magnetic recording device for a camera can be realized. Further, a camera equipped with such a magnetic recording device can be realized.

[Brief description of the 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 detecting perforation and a magnetic head, and a relationship between a film movement 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 during magnetic recording according to the first embodiment of the present invention.

FIG. 6 shows a recording control circuit 4 according to the first embodiment of the present invention.
3 is a flowchart showing the operation of FIG.

FIG. 7 is a diagram illustrating timings of signals of respective units during magnetic recording according to the first embodiment of the present invention.

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

FIG. 11 is a flowchart showing an 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 illustrating an operation of a recording control circuit according to the second embodiment of the present invention.

FIG. 13 is a diagram illustrating timings of signals of respective units during magnetic recording according to a second embodiment of the present invention.

FIG. 14 is a flowchart illustrating an operation of a pulse measuring unit of the pulse conversion circuit according to the second embodiment of the present invention.

FIG. 15 is a flowchart showing the operation of the pulse generation unit of the pulse conversion circuit according to the second embodiment of the present invention.

[Explanation of symbols]

 34 ... Film moving amount detection circuit 60 ... Camera control circuit 62 ... Recording control circuit 63 ... Magnetic recording head 1 64 ... Magnetic recording head 2 70 ... Switch SPL (pulse conversion circuit) 71 ・ ・ ・ Pulse conversion circuit

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-146509 (JP, A) JP-A-4-22909 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 17/24

Claims (2)

(57) [Claims] 1. A magnetic recording device for a camera having a magnetic recording function, wherein a film having a magnetic recording portion is mounted, and data relating to exposure is recorded on the recording portion in accordance with a standard in accordance with exposure of each frame of the film. In the above , pulse input means for inputting a first pulse signal generated in accordance with the movement of the film, predetermined signal input means determined for each camera to satisfy the above standard, and input by the pulse input means Converting the first pulse signal into a second pulse signal that has a different period, is synchronized with the first pulse signal, and satisfies the above standard , based on a predetermined signal input by the signal input means. Means for recording data on the exposure on the film in synchronization with the second pulse signal converted by the conversion means when the film is wound up. A magnetic recording device for a camera, comprising: recording means. 2. A camera provided with a magnetic recording device which is mounted with a film having a magnetic recording portion and records data relating to exposure to said recording portion in accordance with a standard in response to exposure of each frame of said film. Pulse input means for inputting a first pulse signal generated in accordance with movement, predetermined signal input means determined for each camera to satisfy the above standard, and the first signal input by the pulse input means Converting means for converting the pulse signal of the above into a second pulse signal which has a different period, is synchronized with the first pulse signal, and satisfies the above-mentioned standard , based on a predetermined signal inputted by the signal input means; Recording means for recording data on the exposure onto the film in synchronization with the second pulse signal converted by the conversion means when winding up Characterized in that had example, a camera having a magnetic recording device.