JPH055943A - Camera - Google Patents

Abstract

PURPOSE:To prevent an information signal from being disturbed due to electric noise by shifting time required for the information reading actions of the magnetic recording part of a film and a rotating recording member on which bar code information is recorded. CONSTITUTION:The rotating recording member 3 is integrally rotated with a film supply spool in a film cartridge and the information on the film 2 is encoded by A bar code and recorded on it. Besides, the information on the film 2 is recorded on the magnetic recording part 6 on the film 2. Then, the respective time required for the information reading actions of the recording part 6 and the rotating member 3 are shifted. Besides, it is favorable that the light emitting element of a photoreflector for reading a bar code 8 is turned on only when the information of the rotating member 3 is read. Then, when the information of the recording part 6 is reproduced, the electric noise is eliminated or the noise from the read circuit of the rotating member 3 is prevented from affecting on the reproducing by turning off the light emitting element of the read circuit of the rotating member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a film cartridge having a bar code disk which rotates integrally with a spool on the film cartridge.

[0002]

2. Description of the Related Art A camera in which information relating to a film is recorded as magnetic information on a member which moves integrally with the feeding of the film and the information is read along with the feeding of the film is disclosed in JP-A-55-22799. Proposed. Further, as a means for recording the information on the film, a method of recording it as a bar code and reading it by an optical means such as a photo reflector can be considered.

[0003]

In the conventional reading of information, the light emitting element of the rotary member reading photoreflector in which the bar code is encoded and recorded is turned on even when the information of the magnetic recording portion is obtained. Since it was left as it was, electrical noise from the reading circuit of the rotating member on which the bar code was recorded sometimes added to the information reproducing circuit of the magnetic recording unit on the film, so the reading of information was accurate. There was a problem that I could not do it.

Further, if the ISO information and the film information are obtained only from the rotary member in which the bar code is coded and recorded, there is a problem that the information cannot be obtained when one information source fails or the like. Simultaneous reading of information from the rotary member on which the code is recorded and the magnetic recording portion on the film causes a problem that accurate reproduction cannot be performed due to electrical noise.

The present invention has been made in order to solve the above problems, and it staggers the reading operation of the information recorded in each part, and the electric noise caused by the light emitting element for reading from the rotating member. It is an object of the present invention to provide a camera that prevents the film from being added to the information reproducing circuit of the magnetic recording unit on the film.

[0006]

In order to achieve the above-mentioned object, the camera of the present invention has an operation of reading information in a magnetic recording portion on a film and a rotary member coded and recorded by a bar code. The information reading operation and the time for reading the information are shifted, and the light emitting element of the bar code reading photo reflector is turned on only when the information on the rotary member encoded by the bar code is read.

[0007]

According to the present invention, at the time of reproducing information from the magnetic recording portion, the light emitting element of the reading circuit of the rotary member in which the bar code is encoded and recorded is turned off to eliminate electric noise, and to eliminate the bar noise. Noise from the reading circuit of the rotary member on which the code is recorded is no longer affected when reading the magnetically recorded information in other parts.

[0008]

1 to 5 are views showing an embodiment of the present invention. 1 and 2, 1 is a film cartridge,
2 is a film, 3 is a bar code board as a rotating member,
4, 5 are perforations, 6 are magnetic recording tracks,
7 is a notch for ISO detection, 8 is a photo reflector for bar code detection, 9 is a notch detection switch for ISO detection, 1
Reference numeral 0 is a film feeding fork, 11 is a film feeding gear unit, 12 is a film feeding motor, 13 is a magnetic head for reading information recorded on the magnetic recording track 6, 14 is a pad pressing unit, and 15 is a pad pressing unit. Is a presser pad, 16 is a perforation detection photo reflector, 17 is a release switch, 18 is a release switch button, 19 is a photo reflector detection circuit, 20 is a magnetic recording / reproducing circuit, 21 is a microcomputer, 22 is a motor drive circuit, 23 Is another control circuit, and 24 is a display circuit.

In the camera of this embodiment, the bar code plate 3 is rotated by prewinding, and the bar code plate 3 is read by the bar code detecting photo reflector 8 by moving the film 2. By reading the magnetic recording track 6 with the magnetic head 13, I
SO information can be obtained. In addition, bar code board 3
Alternatively, information on the total number of films can be obtained from the magnetic track 6.

Next, the operation of FIGS. 1 and 2 will be described with reference to the flow charts of FIGS.

FIG. 3 is a flow chart of a main program which is an embodiment of the present invention. First, rotation of the film in the film cartridge is started in order to prewind and wind the film (# 101). Then, the other control circuit 23 performs the operation of moving the lens to the initial position (initialization) (# 102). Next, the ISO information is read (# 103), and as the release sequence, when the release switch 17 is turned on as in the conventional camera, the lens is moved to a predetermined position by autofocus, and the shutter speed and aperture are set by the automatic aperture. Decide.
After that, the shutter is opened, and the film 2 is wound up after photographing (# 104). Then, the rotation of the film is stopped (# 105), and the process ends.

FIG. 4 is a flowchart showing an ISO reading subprogram.

In FIG. 4, first, the reading operation of ISO information is started (# 201), and the ISO detection notch 7 at the end of the film cartridge 1 is used as ISO information.
It is detected by the detection notch detection switch 9 (# 20
2). In this embodiment, since the ISO information is 1-bit information, if the switch 9 is ON, for example, ISO400, O
If it is FF, it is judged to be ISO100. Next, the magnetic head 13
Then, the ISO information recorded on the magnetic track 6 of the film 2 is read (# 203). Details of ISO information reading will be described later with reference to FIG. 7. Then, it is checked whether the ISO information of the film 2 and the information of the total number of films recorded on the magnetic track 6 can be read (# 204). If the ISO information on the magnetic track 6 cannot be read, the bar code ISO information recorded on the bar code board 3 is read by the photo reflector 8 (# 205). The details of reading the bar code ISO information will be described later with reference to FIGS. After reading the bar code ISO information, the feeding of the rotating film of the film cartridge 1 is stopped (# 20
6). If the ISO information of the film and the information about the total number of films can be read at # 204, the film feeding is stopped (# 206), and the film 2 is fed when the film 2 is completely wound by the prewind camera. stop. Details of stopping the film feeding will be described later with reference to FIG. Then, it returns to the main program (# 207).

The rotation of the bar code board 3 at the time of prewinding is started (# 201), and the ISO information recorded by being symbolized by the bar code is read according to the process described later shown in FIGS. 5 and 6. (# 202), then
The film feeding is stopped by the method described in the flowchart of FIG. 7 (# 203). Then, the process returns to the main program (# 204).

FIGS. 5 and 6 show ISO information in a bar code,
And a flowchart of a program for reading the number of films.

In FIGS. 5 and 6, when the film starts to be wound to perform prewinding (# 301), the LED of the bar code detecting photo reflector 8 is turned on via the photo reflector detecting circuit 19 (# Thirty
2).

When the LED lights up, the data written on the bar code board 3 is read in order. The barcode is 0 when it is narrow and 1 when it is wide due to its black and white width. Also, here, white and black have the same information. Therefore, the width of the white next to the black is the same as the width of the previous black, such as narrow black, narrow white, wide black, wide white .... Further, the reading start portion has a portion having an intermediate width between the narrow width and the wide width.

While the timer T _BW (bar code white) T _BB (bar code black) in the microcomputer is reset and the data numbers are sequentially assigned, the reading start portion is set to N = O (# 303).

It is checked whether or not the pattern of the bar code board 3 in the detecting section of the bar code detecting photo reflector 8 is white (# 304).

Before the start of reading, the photo reflector 8 is on the black pattern. Then, the timer T _BW starts counting (# 305). Then, as in # 304, it is checked whether the pattern is black (# 306), and the timer _TBW is stopped. T _BW0 = T _BW is set as a starting point (# 307). Here, T _BW0 indicates the time in the middle width of the white pattern.

Next, the timers T _BW and T _BB are reset (# 308) and the timer T _BB starts counting (# 30).
9). After that, similarly to # 304, it is checked whether or not the pattern of the bar code board 3 in the detecting portion of the barcode detecting photo reflector 8 is white (# 310). If the pattern is white, the timer T _BB is counted. Stop (# 31
1). Here, the time during which the pattern was black was obtained as T _BB .

Next, the timer T _BW starts counting (#
312). Then, similarly to # 306, it is checked whether or not the pattern of the bar code board 3 in the detecting portion of the bar code detecting photo reflector 8 is black (# 313), and if it is black, the timer T _BW is stopped counting ( # 314). Here, the time during which the pattern was white was obtained as T _BW .

Then, for T _BW and T _BB obtained in # 311 and # 314 respectively, T _BWN = T _BW and T _BBN = T
_BB (# 315). N is the number of the signal.

Next, the N-th signal is checked and T
_{If BWN} > T _BW0 , the width of white becomes wide, and if T _BWN <T _BW0 , the width of white becomes narrow, and becomes 0 (# 316). Therefore, if T _BWN > T _BW0, then BDATAN (bar code data) = 1 (# 317), and if T _BWN <T _BW0, then B
DATAN is set to 0 (# 318).

Then, BDATA is accumulated in order (# 3
19). N = 1 to MM is a predetermined number. BD
It is determined whether or not ATA has been accumulated (# 320). Here, it is determined whether N = M, and if N = M,
The ISO information and the total number of films are decoded from BDATA (# 321). Then turn off the LED (# 32
2) Return to the original program (# 323).

FIG. 7 is a flow chart of a program for reading the ISO information and the number of films by the magnetic head.
First, the feeding of the film 2 is started (# 401).
Information recorded on the magnetic recording track 6 is recorded on the magnetic head 1.
3 and the magnetic recording / reproducing circuit 20 cause a digital signal (MgO
UT).

This recording signal is recorded by the pulse phase modulation method. Therefore, the magnetic recording / reproducing circuit 2
The digital signal (data) obtained by 0 is stored as follows. If the rising edge between the falling edges of MgOUT is close to the previous falling edge, DATA = 0 is set, and if the rising edge is close to the subsequent falling edge, DATA = 1 is set. Then, the digital signal (MgOU) obtained by the magnetic recording / reproducing circuit 20.
It is checked whether T) is MgOUT = 1 (# 402). M
If gOUT = 1 is not satisfied, the process returns. If MgOUT = 1, then it is checked whether MgOUT = 0 (# 40).
3). If MgOUT is not 0, return to the original, MgOUT
= 0, then the counter T _HM (time between MgOUT = 1) and T _LM (MgO) in the microcomputer
(Time between UT = 0) is reset (# 404). Then, the timer T _LM starts counting (# 40
5). Then, check whether MgOUT = 1 (# 40
6), if MgOUT = 1, continue counting, M
If gOUT = 1, the count of the timer T _LM is ended (# 407). After that, the timer T _HM starts counting (# 408), and it is checked whether MgOUT = 0 or not (# 409). Then, if MgOUT = 0 is not satisfied, the counting is continued, and if MgOUT = 0, the timer T _HM is finished counting (# 410). Then, check whether T _LM <T _HM (# 411), and if T _LM <T _HM , DATA =
It is judged as 0 (# 412), and if T _LM > T _HM , DATA = 1
(# 413), and in any case, these DAT
A is stored, but since it is recorded with a predetermined data pattern, data is stored according to the data pattern (# 414).

Next, it is checked whether or not the result of the data accumulation has ended (# 415). If the data is not stored, the process returns to # 404. If the data is stored, the ISO information and the total number of films are decoded from the stored data (# 416), and the original program is returned (# 417). ..

FIG. 8 is a flow chart of a program for stopping film feeding. First, when film winding is started by the prewind camera (# 501), hole perforations 4 and 5 on the film are counted by the photoreflector 16 for perforation detection, and the number of film feed frames is counted. It is judged whether or not the number of film frames sent is one before the total number of films by the bar code board 3 or the magnetic recording track 6 (# 503), and the motor 12 is decelerated (# 504). Next, the film 2 is stopped at the last frame in accordance with the perforations 4 and 5 (# 5
05). Then return to the original program (# 50
6).

As described above, the feature of the present invention is that the light emitting diode is turned on only when the information on the bar code board 3 is read (# 302 in FIG. 5). Along with that, Fig. 4
As is clear from the flow chart of
The information is read from the magnetic recording track 6 at a different time.

FIG. 9 shows an ISO according to another embodiment of the present invention.
6 is a flowchart of a subprogram for reading information.
The flowchart in FIG. 9 corresponds to FIG. 4 in the above-described first embodiment, but is different from FIG.
In the embodiment of FIG.
In contrast to reading the SO film number information, in the present embodiment, the ISO recorded on the bar code board 3 first is read.
This is the point to read the number of films information.

The flowchart of FIG. 9 will be described below. First, start reading ISO information (# 60
1). Then, the ISO information is detected by the notch detection switch 9 for ISO detection as described in # 202 of FIG. 4 (# 602). Next, the bar code ISO information recorded on the bar code board 3 is read by the photo reflector 8 (# 603), and it is checked whether or not the ISO film number information recorded on the bar code board 3 has been read. (#
604). When the bar code ISO information cannot be read, the ISO information recorded on the magnetic track 6 of the film 2 is read by the magnetic head 13 (# 605), and the same as when the bar code ISO information is read, Stop feeding (# 606) and return to the original program (# 60)
7).

FIG. 10 is a flow chart showing still another embodiment of the present invention. In the first and second embodiments described above, the ISO information was read by the ISO detection notch 7, whereas when the magnetic recording track 6 on the film 2 could be read, the bar code board 3 and the ISO detection were used. The ISO information is not read due to the notch 7. Further, when the magnetic recording track 6 cannot be read and the bar code board 3 can be read, the ISO information by the ISO detection notch 7 cannot be read.

When neither the magnetic track 6 nor the bar code board 3 can be read, the ISO information by the ISO detection notch 7 is read. When neither the magnetic track 6 nor the bar code board 3 can read the ISO information by the notch 7 for ISO detection, ISO information shall be normal ISO, for example, ISO400 or ISO100.

Next, details will be described with reference to the program shown in FIG. First, start the reading operation (# 701),
The MgISO information of the magnetic recording track 6 on the film 2 is read (# 702). Since this is the same as # 203 in FIG. 4, description thereof will be omitted. Next, it is checked whether the ISO information and the number of films recorded on the magnetic recording track 6 can be read (# 703). If the ISO information and the number of films cannot be read, the bar code I is read by the same method as # 205 in FIG.
Read SO (# 704). Then, it is checked whether the ISO information and the number of films recorded on the bar code board 3 can be read (# 705). If the bar code ISO information cannot be read, the end of the film cartridge 1 is processed by the same method as # 202 in FIG. The ISO detection notch 7 in the above is detected as the ISO information by the ISO detection notch detection switch 9 (# 706). Then, it is checked whether the ISO notch 7 can be read by the switch 9 (# 707). At that time, for example, when the switch 9 is repeatedly turned on and off, it is determined that the image cannot be read, and the ISO is set to the normal ISO (# 7).
08) to set ISO to a value of commonly used ISO such as 100 or 400. Then, the film feeding is stopped in the same manner as in # 206 of FIG. 4 (# 709), and the original program is returned (# 710). Also, # 703, #
If ISO information is obtained when checking in 705 and # 707, immediately stop film feeding (# 709).
Then, it returns to the original program (# 710).

[0036]

As described above, in the camera of the present invention, the information recording operation between the magnetic recording portion on the film and the rotating member on which the bar code information is recorded is performed in a staggered manner. The signal is not disturbed, and the light emitting element is not turned on during reproduction of the magnetic recording portion on the film, so that the information signal is not disturbed by electrical noise.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a camera that is an embodiment of the present invention.

FIG. 2 is a block diagram of a main configuration of a camera that is an embodiment of the present invention.

FIG. 3 is a flowchart of a main program that is an embodiment of the present invention.

FIG. 4 is a flowchart showing an ISO reading subprogram.

FIG. 5 shows a flow chart of a program for reading ISO information and the number of films by a bar code.

FIG. 6 shows a flowchart of a program for reading ISO information and the number of films by a bar code.

FIG. 7 is a flowchart of a program for reading ISO information and the number of films on a magnetic head.

FIG. 8 is a flowchart of a program for stopping film feeding.

FIG. 9 is a flowchart of a subprogram for reading ISO information which is another embodiment of the present invention.

FIG. 10 is a flowchart showing still another embodiment of the present invention.

[Explanation of symbols]

 1 film cartridge 2 film 3 bar code board 4, 5 perforation 6 magnetic recording track 7 ISO detection notch 8 bar code detection photo reflector 9 ISO detection notch detection switch 10 film feeding fork 11 film feeding gear Unit 12 Film feeding motor 13 Magnetic head 14 Pad presser unit 15 Presser pad 16 Photoreflector for perforation detection 17 Release switch 18 Release switch button 19 Photoreflector detection circuit 20 Magnetic recording / reproducing circuit 21 Microcomputer 22 Motor drive circuit 23 Others Control circuit 24 Display circuit

Claims (1)

Claim: What is claimed is: 1. A film supply spool in a film cartridge rotates integrally with the film supply information,
In a camera using a rotary member coded by a bar code and recorded, and a film in which information about the film is recorded in a magnetic recording unit on the film, an operation of reading information in the magnetic recording unit on the film, A camera characterized by staggering each time of an operation of reading information recorded on a rotary member encoded by a barcode. 2. The camera according to claim 1, wherein the light emitting element of the bar code reading photo reflector is turned on only when the information encoded on the rotary member is read by the bar code.