JPH08327316A - Detector and camera using it - Google Patents

Abstract

PURPOSE: To reduce the number of A/D converters taking in analog outputs to the number of sensors for the analog outputs, by selecting an output from a plurality of detecting means in accordance with a content desired to be detected and inputting the output to a control circuit. CONSTITUTION: For example, when a cartridge 4 is loaded, a white-and-black pattern on a film data display part 6 of the cartridge 4 rotating in accordance with the movement of a film 1 is read by photoreflectors 12, 13, 29, 30, and perforations 2a, 2b, 2c, 2d,... on the film are detected thereby detecting a position or a moving speed of the film. A control circuit functions to control the whole camera, selecting a detection output of the photoreflector 12, 13, 29, 30 in accordance with a content desired to be detected, and taking the output into an A/D converter. Or, the control circuit selects and drives a light-emitting element of the photoreflector 12, 13, 29, 30 in accordance with the content desired to be detected. Accordingly, only data of one detecting means is applied to one input part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit which optically detects a plurality of detection information such as film information and perforation of a film by a plurality of detection means, and which has less inputs than the number of detection means. The present invention relates to a detection device configured to be taken in to and a camera using the detection device.

[0002]

2. Description of the Related Art Conventionally, a camera for discriminating whether or not a film has been exposed by a rotational position of a rotating disk having a black and white pattern on a film cartridge is disclosed in US Pat.
No. 913. Also disclosed is a method of rotating a rotary disk to read a black-and-white pattern on the disk and reading information on the film.

Further, Japanese Unexamined Patent Publication No. 4-328536 discloses a technique relating to a camera in which an exposure position on a film is determined by a perforation position and the perforation is detected by using two sensors to feed the film. ing.

Optical detection means such as a photo-reflector is used for the information reading means and the perforation detection, and FIG. 11 shows an example of the circuit.

The control unit 65 has a function of controlling the entire camera. The control unit 65 has input terminals ADIN1 and ADIN.
2, ADIN3 and ADIN4 are provided. Input terminal A
Each of DIN1 to ADIN4 has a photo reflector 6
Each of 6 to 69 is connected. Photo reflector 6
Reference numerals 6 and 67 are used for reading data on the rotating disk, and photoreflectors 68 and 69 are used for detecting perforation.

These photoreflectors have the same circuit configuration and include an LED and a phototransistor. That is, the photo reflector 66 is an LED
66D and phototransistor 66T, photoreflector 67 is composed of LED 67D and phototransistor 67T, photoreflector 68 is composed of LED 68D and phototransistor 68T, and photoreflector 69 is composed of LED 69D and phototransistor 69T. And
The LEDs 66D, 67D, 68D, and 69D are connected in series to the (+) power source, and the output terminal of the LED 69D is the constant current circuit 7.
Connected to 0. Also, the phototransistor 66T
Each of the 69T emitters has input terminals ADIN1 and ADIN
2, connected to each of ADIN3 and ADIN4, and
Input terminals ADIN1, ADIN2, ADIN3, ADI
Between each of N4 and the ground, resistors 71, 72, 73,
Each of the 74 is connected.

In the circuit of FIG. 11, LEDs 66D ...
The output light from 69D is applied to the rotating disk or perforation, and the reflected light from the rotating disk or perforation is received by the corresponding one of the phototransistors 66T to 69T. The current flowing according to the amount of received light causes a voltage to be generated in the corresponding resistors 71 to 74, and is taken into the control unit 65. The control unit 65 converts the input voltage into a digital voltage and reads the data.

[0008]

However, in the above-mentioned prior art, since the outputs of the respective photoreflectors are input to different A / D converters, a large number of A / D converters are provided.
A D converter is needed. Further, when a one-chip microcomputer is used for the control unit, the number of input terminals of the A / D converter is limited and the input pins may be insufficient.

It is an object of the present invention to provide a detection device capable of reducing the number of A / D converters which take in the number of analog output sensors, and a camera using the detection device.

[0010]

[Means and Action for Solving the Problems] The structure for realizing the object of the invention according to the present application is as described in claim 1.
A plurality of optical detecting means including a light emitting element and a light receiving element for detecting reflected light or passing light from a detection target, an input section less than the number of the detecting means, and an A / D connected to the input section A control circuit having a converter for performing detection processing and the like, and selecting the output of the corresponding detection means of the plurality of detection means according to the content to be detected and inputting it to the control circuit, or according to the content to be detected And a selecting means including at least one of means for selecting and driving the light emitting element of the corresponding detecting means among the plurality of detecting means.

According to this structure, one input section of the detection circuit is shared by the plurality of detection means so that the outputs of the plurality of detection means can be shared, and the light emitting element of the detection means to be operated is driven to light up, or By selectively connecting the circuits of the output stage, only the information from one detecting means is applied to one input section. Therefore, the number of required A / D converters can be reduced, and the limited input of the A / D converter can be effectively used.

According to a second aspect of the present invention, the reading means reads the data on the rotary disk provided in the film cartridge that rotates with the movement of the film. In a camera having a function of detecting a perforation on a film to detect a position or a moving speed of the film, at least one first detection including a light emitting element and a light receiving element to optically read a pattern on the rotating disk. Means, at least one second detecting means that includes a light emitting element and a light receiving element, and optically detects the perforation of the film in the portion pulled out from the film cartridge; and when reading data from the rotating disk, Turning on the light emitting element of the first detecting means and turning off the light emitting element of the second detecting means, Follower during detection of the configuration to clear the light-emitting device of the first detecting means, and a configuration in which a control means for turning on the light emitting element of the second detecting means.

According to this structure, when the pattern on the rotating disk provided in the film cartridge and the perforation of the film are detected, the light emitting elements of the respective detecting means are selectively turned on / off to thereby detect the detection circuit. Even if the number of input terminals on the side is larger than the number of detecting means, detection for each purpose can be performed. Therefore, the required A / D
The number of converters can be reduced, and the limited input of the A / D converter can be effectively used.

A specific configuration for achieving the object of the invention according to the present application is, as described in claim 3, provided with a detection circuit for detecting data or the perforation with respect to the output of the optical detection means, Since the output parts of the plurality of detection means are connected in parallel and are connected to one input terminal of the detection circuit, the limited input of the A / D converter can be effectively used with a simple configuration. can do.

As another specific configuration for realizing the object of the invention according to the present application, as described in claim 4, each of the detecting means is configured to use a photo reflector or a photo interrupter. Thereby, the optical detection means can be realized with a simple configuration.

Another structure for realizing the object of the invention according to the present application is, as described in claim 5, a reading means for reading data on a rotating disk provided in a film cartridge rotating with the movement of the film. A camera having a function of reading and detecting a perforation on a film to detect a position or a moving speed of the film, the camera having a light emitting element and a light receiving element to optically read a pattern on the rotating disk. Detecting means, at least one second detecting means that includes a light emitting element and a light receiving element and optically detects the perforation of the film in the portion pulled out from the film cartridge, the first detecting means and the first detecting means. A circuit for detecting data or perforation relating to the film based on each output of the second detecting means; And control means for inputting the output of the first detection means to the circuit when reading data from the disk and for inputting the output of the second detection means to the circuit when detecting the perforation. It is configured.

According to this configuration, in the configuration in which the number of inputs of the detection circuit to the detection means is small, the control means and the first detection means and the detection means take in the detection information from the first detection means. The input section of the circuit is connected, and when the detection information is fetched from the second detection section, the second detection section and the input section of the detection circuit are connected. Therefore, the required A / D
The number of converters can be reduced, and the limited input of the A / D converter can be effectively used.

As a concrete constitution for realizing the object of the invention according to the present application, as described in claim 6, each of the detection means has a constitution using a photo reflector or a photo interrupter. As a result, the optical detection means can be realized with a simple configuration.

According to a seventh aspect of the present invention, a reading means reads data on a rotating disk provided in a film cartridge that rotates with the movement of the film. In a camera having a function of detecting a perforation on a film to detect a position or a moving speed of the film, at least one first detection including a light emitting element and a light receiving element to optically read a pattern on the rotating disk. Means, at least one second detection means for optically detecting the perforation of the film in the portion pulled out from the film cartridge, comprising the light emitting element and the light receiving element, the first detection means and the second A circuit for detecting data or perforation relating to the film based on each output of the detecting means, and the rotating circle Wherein while turning on the light emitting element of the first detection means when reading data from the second
The light emitting element of the detecting means is turned off, and the light emitting element of the first detecting means is turned off at the time of detecting the perforation, and the output of the first detecting means is selectively input to the circuit to prevent the perforation. When detecting, the light emitting element of the first detecting means is turned off, the light emitting element of the second detecting means is turned on, and the control means for inputting the output of the second detecting means to the circuit is provided. It is configured to

According to this structure, the detecting means selectively drives the light emitting element according to the purpose of use, and the output of the detecting means is selectively connected to the input portion of the detection circuit according to the purpose of use. be able to. Therefore, the number of required A / D converters can be reduced, and the limited input of the A / D converter can be effectively used.

A specific configuration for achieving the object of the invention according to the present application is such that each of the detection means uses a photo-reflector or a photo-interrupter. As a result, the optical detection means can be realized with a simple configuration.

[0022]

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

(First Embodiment) FIG. 1 is an exploded perspective view showing a main part of an embodiment of a camera according to the present invention.

In FIG. 1, 1 is a film and 2 is a film.
Symbols a, 2b, 2c, 2d ... Are perforations on the film 1. 3 is a magnetic recording part on the film 1, 4
Is a cartridge for storing the film. Reference numeral 5 denotes a movable light-shielding opening / closing operation portion of the cartridge 4, which is operated by a movable light-shielding window opening / closing member (not shown). Reference numeral 6 denotes the film 1 such as the film exposure state, whether the film in the cartridge 4 has been exposed, the type and sensitivity of the film, and the number of shots
Is a film information display section for displaying the information of the film. The exposure state of the film is displayed by the state of the black and white pattern when the film is inserted, and the film state is displayed by the code of the black and white pattern on the display section. A movable light-shielding window 7 of the cartridge 4 is opened and closed by operating the movable light-shielding opening / closing operation section 5.

Reference numeral 8 is a spool shaft of the cartridge 4,
The film 1 is wound into the cartridge 4 by rotating the film 1 in the direction in which the film 1 is rewound into the cartridge 4. Further, the film information display section 6 also rotates at the same time when the spool shaft 8 rotates. Reference numeral 9 denotes a window of the cartridge 4, and the film information display section 6 is exposed to the outside, and the film information display section 6 can be detected by the detection means from the camera body side. Reference numeral 10 is a magnetic head for recording / reproducing information on / from the magnetic recording portion 3 on the film 1, and 11 is a pad, which is arranged opposite to the magnetic head 10 and functions to sandwich the film 1 by a predetermined force. That is, the magnetic recording portion 3 on the film 1 is moved to the magnetic head 1 by the pad 11.
Press 0. Photoreflectors (optical detection means) 12 and 13 detect the state of the film information display section 6.

Here, details of the film will be described. FIG. 2 is a plan view showing the structure of the film (note that
The image on the film frame is an expected image of the image remaining after development and fixing.) 14a, 14b, 14c, 14d, 14e
Is an exposure part (image circle), and 14a,
14b and 14c are exposed, and 14d to 14e are final exposure.

Returning to FIG. 1, reference numerals 23 and 24 denote cartridge presence / absence detection switches, which are brought into conduction (switch-on) when the cartridge 4 is inserted into the cartridge chamber in the camera body (not shown). Reference numeral 25 is a film rewinding joint member, and the film 1 can be rewound into the cartridge 4 by this rotation. Reference numeral 26 denotes a gear unit, which transmits the driving force of the motor 27 via the gear 28 to the film rewinding joint member 25 and a film winding member (not shown).

When the film 1 is pulled out from the cartridge 4, first, the film rewinding joint member 25 is rotated in the direction in which the film 1 comes out of the cartridge 4, and at the same time, the film winding member (not shown) is also rotated. The film 1 is wound by rotating the film 1 in the winding direction. Then, a film rewinding joint member 25 so that the rewinding force of the film rewinding member (not shown) may be rewound.
When the pushing force generated by the film unit 26 becomes dominant, the planetary gear in the gear unit 26 is disengaged, and the film rewinding joint member 25 is released.
Has no driving force. As a result, the load on the motor 27 can be reduced. When the film 1 is rewound, the motor 27 rotates in the reverse direction, and the film rewinding joint member 2
5 is rotated so that the film 1 enters the cartridge 4,
The film 1 can be wound into the cartridge 4.

Reference numerals 29 and 30 denote photoreflectors as optical detection means, and these both function as perforation sensors, and perforations 2a, 2b, and
It is possible to detect the passage of 2c, 2d, ... And calculate the moving speed. A signal having a recording frequency corresponding to the moving speed is applied to the magnetic head 10 to perform magnetic recording. The photo reflector 30 is arranged so as to face the perforations, and the perforations 2a, 2b, 2c, 2d.
When ... passes, the power to the motor 27 is time-divided,
The deceleration is controlled so that the film 1 can be easily stopped.

Then, at the moment when the perforation passes again, both electrodes of the motor 27 are short-circuited and a brake is applied to stop the film 1. Also, film 1
By rotating the motor 27 in the direction in which the film 1 enters the cartridge 4 with the film 1 stored in the cartridge 4, the film information display portion 6 rotates while the film 1 remains in the cartridge 4, and the photo reflector (optical The black and white pattern on the film information display section 6 is read by the detecting means) 12 and 13 to obtain information on the film 1.

FIG. 3 is a plan view showing the cartridge 4. In the figure, 12a and 13a are photoreflectors 12 and 1.
3 shows the center position of each of the three, and the movable light-blocking opening / closing operation section 5
Is in the direction shown, the spool shaft 8 is prevented from rotating. In FIG. 3, when the film information display portion 6 is at the position shown in (a), the final exposure is performed, when in (b) all the frames of the film are exposed, and when in (c), the film is partially exposed, ( d) shows each state where the film has been developed.

FIG. 4 is an electric block diagram, and 31 is a control circuit for performing overall control. Reference numeral 32 denotes a control circuit that executes autofocus control (AF), automatic exposure control (AE), shutter control (SH), and the like. 33 is a display unit such as an LCD, 34 is a sounding body, 36 is a motor drive circuit, 37 and 38 are switches linked to a release button, and they are turned on in the order of switch 37 → switch 38 linked to the release button. Become. Reference numeral 39 is a film rewinding switch, 40 is a cartridge lid closing detection switch, and 41 is a magnetic recording / reproducing unit.

FIG. 5 is a circuit diagram showing the details of the connection relationship between the photoreflectors 12, 13 and the perforation sensors 29, 30 and the control circuit 31.

The control unit 31 has a function of controlling the entire camera, and the control unit 31 outputs the output terminals LEDON1, LEDON.
ON2, A / D converter input terminals ADIN1, AD
It has four input and output terminals for IN2. Input terminal A
The output terminals of the photo reflectors 12 and 29 are connected to each of the DINs 1. Further, a constant current circuit 42 is connected to the output terminal LEDON1, and a constant current circuit 43 of the same circuit as the constant current circuit 42 is connected to the output terminal LEDON2. Then, the input terminal of the constant current circuit 42 is LE
The output end of D13D is connected, and the output end of the LED 30D is connected to the input end of the constant current circuit 43. A resistor 44 is connected between the input terminal ADIN1 and the ground, and a resistor 45 is connected between the input terminal ADIN2 and the ground.

Photoreflector 12, 13, 29, 30
Each has the same circuit configuration and includes an LED and a phototransistor. That is, the photo reflector 12 includes the LED 12D and the phototransistor 12
T, the photoreflector 13 is an LED 13D and a phototransistor 13T, and the photoreflector 29 is an LED 29D.
The phototransistor 29T and the photoreflector 30 are composed of an LED 30D and a phototransistor 30T, respectively. The LEDs 12D, 29D and the phototransistors 12T, 13T, 29T, 30T are connected in series to the (+) power source. The emitters of the phototransistors 12T and 29T are commonly connected and further connected to the input terminal ADIN1. Similarly, the emitters of the phototransistors 13T and 30T are commonly connected and connected to the input terminal ADIN2.

The constant current circuit 42 is an NPN transistor 42.
a, 42b and resistors 42c and 42d, the constant current circuit 43 includes NPN transistors 43a and 43b and a resistor 4
3c and 43d, and operates based on the output signals of the output terminals LEDON1 and LEDON2.

In the configuration of FIG. 5, for example, the output terminal L
When an output voltage is generated at EDON1, the voltage is applied to the base of the transistor 42a through the resistor 42d, and the transistor 42a is turned on. LED12 by this
D and 13D are energized, both emit light, and the phototransistors 12T and 13T can be detected. Detection signals from the phototransistors 12T and 13T are taken into the input terminals ADIN1 and ADIN2, and are converted into digital signals by the control circuit 31.

FIG. 6 is a flow chart showing the operation of the circuit of FIG. Here, the film loading operation when the cartridge 4 is mounted on the camera is shown. In the present invention, the step in the flowchart is represented by "S".

When the cartridge 4 is attached to the camera and the cartridge presence / absence detection switches 23 and 24 are turned on, the control circuit 31 detects that the cartridge 4 is attached to the camera (S601), and film loading is started. It Then, the control circuit 31 outputs the output terminal LEDO.
N1 is set to the “H” level, the constant current circuit 42 is driven, and the LEDs 12D and 13D of the photo reflectors 12 and 13 are turned on (S602). Next, the photo reflector 12,
A black-and-white pattern indicating the film exposure state on the film information display unit 6 is read by 13 and it is determined whether the mounted cartridge 4 is exposed or final exposure (S60).
3).

At this time, the output terminal LEDO of the control circuit 31
Since N2 is at "L" level and the constant current circuit 43 is inoperative, the photo reflectors 29 and 30 are both off, and no output signal is generated from them. Therefore, only the output of the phototransistor 12T of the photoreflector 12 is input to the input terminal ADIN1 of the control circuit 31, and the phototransistor 1 is input to the input terminal ADIN2.
Only 3T output is input. Each input signal is A / D converted in the control circuit 31.

Then, by rotating the motor 27 in the film rewinding direction, the film rewinding joint member 2 is formed.
Rotate the spool shaft 8 of the cartridge 4 via 5,
The film information display unit 6 is rotated. When the rotation of the film information display unit 6 becomes stable, the photo reflectors 12, 1
The change in the black-and-white pattern on the film information display unit 6 is read by 3 (S604), and converted into a digital signal by the A / D converter in the control circuit 31. After this reading is completed, the rotation of the motor 27 is stopped. The control circuit 31 sets the output terminal LEDON1 to the “H” level, drives the constant current circuit 42, and turns off the LEDs 12D and 13D of the photo reflectors 12 and 13 (S605).

Thereafter, the control circuit 31 outputs the output terminal LEDO.
N2 is set to "H" level to operate the constant current circuit 43,
The LEDs 29D and 30D of the photo reflectors 29 and 30 are turned off (S606). Then, the leading edge of the film 1 is taken out from the cartridge 4 and an operation for winding the film 1 around a film winding member (not shown) is performed. In this operation, the movable light-shielding opening / closing operation section 5 is operated to open the movable light-shielding window, and then the motor 27 is rotated in the direction in which the film 1 comes out of the cartridge 4, and the film rewinding joint member 25 is used. Rotate the spool shaft 8 to move the tip of the film 1 to the cartridge 4
Pull out from. When the film 1 comes out of the cartridge 4, the film 1 passes through the opposed positions of the photo reflectors 29 and 30, and is wound around a film winding member (not shown). When the film is conveyed to a predetermined position, the rotation of the motor 27 is stopped. , Film loading is completed (S6
07).

Here, the position of the film 1 is detected by the photoreflectors 29 and 30.
It is performed by detecting a, 2b, 2c, 2d ... At this time, the LED 1 of the photo reflectors 12 and 13
2D and 13D are off, and the phototransistor 12
No output signal is generated from T and 13T. Therefore, only the output of the phototransistor 29T of the photoreflector 29 is input to the terminal ADIN1 of the control circuit 31, and only the output of the phototransistor 30T of the photoreflector 30 is input to the input terminal ADIN2 of the control circuit 31. The control circuit 31 performs A / D conversion on the signals input to the input terminals ADIN1 and ADIN2, and then detects the output state of the photo reflectors 29 and 30 to detect the position of the film.

Further, the control circuit 31 has an output terminal LEDON.
2 is set to the "L" level, the operation of the constant current circuit 43 is stopped, the LEDs 29D and 30D are turned off (S608), and the cartridge 4 is attached to the camera, and then the film loading operation is completed.

Next, the operation of the configuration shown in FIG. 5 at the time of film winding after photographing is described. When winding the film, the control circuit 31 outputs the output terminal LEDO.
N2 is set to "H" level, the constant current circuit 43 is operated,
The LEDs 29D and 30D are turned on, and the photo reflector 2
Motor 2 while detecting the film position using 9, 30
The film winding operation is executed by rotating 7 in the film winding direction and feeding the film 1 until the film 1 reaches a predetermined position. After the winding operation is completed, the voltage of the output terminal LEDON2 of the control circuit 31 is set to the “L” level, and the winding operation is completed.

As described above, when the film information of the cartridge 4 is read out, L of the photo reflectors 12 and 13 is read.
When the film information is read by turning on the EDs 12D and 13D and moving the film such as film loading, film winding and rewinding, the LEDs 29D and 30D of the photo reflectors 29 and 30 are turned on to determine the position and moving speed of the film. To detect.

In the above embodiment, the photoreflector is used to detect the information on the film and the perforation. However, a photointerrupter or other optical detecting means may be used instead.

(Second Embodiment) FIGS. 7 and 8 show a second embodiment of the present invention. FIG. 7 is a circuit diagram and FIG. 8 is a flow chart of the circuit of FIG.

The control circuit 31 in this embodiment is REA
It has two output terminals of D.DATA and READ.FILM and two input terminals of ADIN1 and ADIN2. Further, each of the photo reflectors 12, 13, 29 and 30 has the same circuit configuration and includes an LED and a phototransistor. That is, the photo reflector 12 includes the LED 12D and the phototransistor 12
T, the photoreflector 13 is an LED 13D and a phototransistor 13T, and the photoreflector 29 is an LED 29D.
The phototransistor 29T and the photoreflector 30 are composed of an LED 30D and a phototransistor 30T, respectively.

Then, the photo reflectors 12, 13, 2
Phototransistors 12T, 13T of 9 and 30,
Each of the resistors 51, 52, 53, 54 is connected between the emitter of each of the 29T and 30T and the ground. And 4 of LED12D, 13D, LED29D, 30D
Each of them is connected in series to the power source, and the constant current circuit 46 is connected to the low end thereof.

Further, an analog switch 47 is connected between the emitter of the phototransistor 12T and the ADIN1 terminal. Similarly, an analog switch 47 is provided between the emitter of the phototransistor 13T and the ADIN2 terminal.
Is connected. The control terminals of the analog switches 47 and 48 are connected to the READ / DATA terminals. When the "H" level voltage is generated at the READ / DATA terminal, the analog switches 47 and 48 are simultaneously turned on.

An analog switch 49 is connected between the emitter of the phototransistor 29T and the ADIN1 terminal. Similarly, the analog switch 50 is provided between the emitter of the phototransistor 30T and the ADIN2 terminal.
Is connected. The control terminals of the analog switches 49 and 50 are connected to the READ / FILM terminals. When the "H" level voltage is generated at the READ / FILM terminal, the analog switches 49 and 50 are simultaneously switched on.

Next, the operation of the circuit of FIG. 7 will be described with reference to the flowchart of FIG. FIG. 8 shows the film loading operation when the cartridge is attached to the camera.

First, when the cartridge 4 is attached to the camera and the cartridge presence / absence detection switches 23 and 24 are turned on, the control circuit 31 detects the attachment of the cartridge 4 (S801). The control circuit 31 then reads
The DATA terminal is set to the “H” level, and this voltage is applied to the control terminals of the analog switches 47 and 48 to turn on the analog switches 47 and 48 (S802). As a result, the black-and-white pattern on the film information display section 6 is read by the photo reflectors 12 and 13, and the film exposure state is detected (S803). Based on this detection result, it can be determined whether the mounted cartridge 4 has been exposed or not.

At this time, READ / FIL of the control circuit 31
Since the voltage at the M terminal is at “L” level and the analog switches 49 and 50 are off, ADIN of the control circuit 31
Only the output of the phototransistor 13T is applied to one terminal, A / D conversion is performed in the control circuit 31, and the pattern of the film information display unit 6 is recognized.

Then, the control circuit 31 rotates the motor 27 in the film rewinding direction and the spool shaft 8 of the cartridge 4 through the film rewinding joint member 25, thereby rotating the film information display section 6. Let After the rotation of the film information display unit 6 is stabilized, the black and white pattern on the film information display unit 6 is read by the photo reflectors 12 and 13 (S804), and the rotation of the motor 27 is stopped when the reading is completed. Also in this case, the read information is A / D converted by the A / D converter in the control circuit 31.
The D-conversion is performed to recognize the black and white pattern.

Further, the control circuit 31 uses READ / DATA.
Set the terminal to "L" level and set the analog switches 47, 48
Is turned off (S805). Then, the control circuit 31
When the voltage of the EAD / FILM terminal is set to the “H” level,
The analog switches 49 and 50 are turned on (S80
6). Here, the operation for taking out the leading end of the film 1 from the cartridge 4 and winding it around a film winding member (not shown) is performed. In this operation, the movable light-shielding opening / closing operation section 5 is operated to open the movable light-shielding window, and then the motor 27 is rotated in the direction in which the film 1 comes out of the cartridge 4, and the film rewinding joint member 25 is used. Rotate the spool shaft 8,
The leading edge of the film 1 is pulled out from the cartridge 4.
When the film 1 comes out of the cartridge 4, the film 1 passes through the opposed positions of the photo reflectors 29 and 30, and is wound around a film winding member (not shown). When the film is conveyed to a predetermined position, the rotation of the motor 27 is stopped. The loading of the film is completed (S807).

Here, the position of the film 1 is detected by the photoreflectors 29 and 30.
It is performed by detecting a, 2b, 2c, 2d ... At this time, the analog switches 47 and 48 are off,
Since only the analog switches 49 and 50 are on, only the output of the phototransistor 29T of the photoreflector 29 is input to the input terminal ADIN1 of the control circuit 31,
Only the output of the phototransistor 30T of the photoreflector 30 is input to the input terminal ADIN2. Control circuit 3
1 performs A / D conversion of the signals input to the input terminals ADIN1 and ADIN2, and then the control circuit 31 detects the output states of the photoreflectors 29 and 30 to detect the position of the film.

Further, the control circuit 31 outputs the output terminal LEDON.
2 is set to the "L" level, whereby the analog switches 49 and 50 are turned off, and the film loading operation after mounting the cartridge 4 on the camera is completed (S80).
8).

Next, the operation of the configuration shown in FIG. 7 at the time of film winding after photographing is described. When winding the film, the control circuit 31 is READ / FIL.
Set the M terminal to "H" level and make analog switches 49, 5
Turn 0 on. As a result, the photo reflectors 29, 3
0 operates, the motor 27 is rotated in the film winding direction while detecting the film position, and the film 1 is fed until the film 1 reaches a predetermined position to execute the winding operation. After the winding operation is completed, the control circuit 3
The voltage of the READ / FILM terminal of 1 is set to the “L” level, and the winding operation is completed.

As described above, when the film information of the cartridge 4 is read, only the outputs of the photo reflectors 12 and 13 are input to the control circuit 31 to read the film information. And when moving the film such as film loading, film winding, rewinding, etc.,
The analog switches 49 and 50 are turned on and only the outputs of the photo reflectors 29 and 30 are input to the control circuit 31 to detect the position and moving speed of the film.

In the structure shown in FIG. 7, the photoreflector is used for detecting the information on the film and the perforation, but a photointerrupter or other optical detecting means may be used instead.

(Third Embodiment) FIGS. 9 and 10 show a third embodiment of the present invention, FIG. 9 is a circuit diagram, and FIG. 10 is a flow chart for explaining the operation of the circuit of FIG.

The control unit 31 has a function of controlling the entire camera. The control unit 31 outputs the output terminals LEDON1 and LEDON.
ON2, A / D converter input terminals ADIN1, AD
It has four input and output terminals for IN2. Input terminal A
The output terminals of the photo reflectors 12 and 29 are connected to each of the DINs 1. Further, a constant current circuit 55 is connected to the output terminal LEDON1, and a constant current circuit 56 of the same circuit as the constant current circuit 55 is connected to the output terminal LEDON2. Then, LE is connected to the input end of the constant current circuit 55.
The output end of D13D is connected, and the output end of the LED 30D is connected to the input end of the constant current circuit 43.

Photoreflectors 12, 13, 29, 30
Each has the same circuit configuration and includes an LED and a phototransistor. That is, the photo reflector 12 includes the LED 12D and the phototransistor 12
T, the photoreflector 13 is an LED 13D and a phototransistor 13T, and the photoreflector 29 is an LED 29D.
The phototransistor 29T and the photoreflector 30 are composed of an LED 30D and a phototransistor 30T, respectively. And LED12D and 29D and LED
13D and 30D are connected in series to the (+) power source, and are connected to the phototransistors 12T, 13T, 29T, 30.
T is connected in parallel to the power supply. Further, the resistors 61, 62, 63, 64 are connected between the emitters of the phototransistors 12T, 13T, 29T, 30T and the ground, respectively.

Further, an analog switch 57 is connected between the emitter of the phototransistor 12T and the ADIN1 terminal. Similarly, an analog switch 58 is provided between the emitter of the phototransistor 13T and the ADIN2 terminal.
Is connected. The control terminals of the analog switches 57 and 58 are connected to the output terminal LEDON1. When the "H" level voltage is generated at the output terminal LEDON1, the analog switches 57 and 58 are simultaneously turned on.

An analog switch 59 is connected between the emitter of the phototransistor 29T and the ADIN1 terminal. Similarly, an analog switch 60 is provided between the emitter of the phototransistor 30T and the ADIN2 terminal.
Is connected. The control terminals of the analog switches 59 and 60 are connected to the output terminal LEDON2.
When the "H" level voltage is generated at the output terminal LEDON1, the analog switches 59 and 60 are simultaneously switched on.

The constant current circuit 55 is an NPN transistor 55.
a, 55b and resistors 55c and 55d, and the constant current circuit 56 includes NPN transistors 56a and 56b and a resistor 5
6c and 56d, and operates based on the output signals of the output terminals LEDON1 and LEDON2.
When the output terminal LEDON1 of the control circuit 31 becomes "H" level, the LEDs 12D, 1 of the photo reflectors 12,13 are
3D is turned on, and when the output terminal LEDON2 goes to "H" level, the photo reflectors 29 and 30 are turned on.

Next, the operation of the circuit of FIG. 9 will be described with reference to the flowchart of FIG. The process shown here is film loading when the cartridge 4 is mounted on the camera.

When the cartridge 4 is attached to the camera and the cartridge presence / absence detection switches 23 and 24 are turned on, the control circuit 31 detects that the cartridge 4 is attached to the camera (S1001), and the film loading is started. It Next, the control circuit 31 outputs the output terminal LED.
Turn ON1 to "H" level to drive the constant current circuit 55,
The LEDs 12D and 13D of the photo reflectors 12 and 13 are turned on (S1002), and the analog switch 5
Turn on 7,58. As a result, the photo reflector 1
The black and white pattern indicating the film exposure state on the film information display unit 6 is read by 2 and 13, and it is determined whether the mounted cartridge 4 is exposed or final exposure (S1).
003). At this time, the phototransistors 12T and 13T
Is input to the output terminals ADIN1 and ADIN2 of the control circuit 31 through the analog switches 57 and 58, and the A / D converter of the control circuit 31 performs A / D conversion to recognize a monochrome pattern.

Then, by rotating the motor 27 in the film rewinding direction, the film rewinding joint member 2 is formed.
Rotate the spool shaft 8 of the cartridge 4 via 5,
The film information display unit 6 is rotated. When the rotation of the film information display unit 6 becomes stable, the photo reflectors 12, 1
The change of the black-and-white pattern on the film information display unit 6 is read by 3 (S1004), and converted into a digital signal by the A / D converter in the control circuit 31. After this reading is completed, the rotation of the motor 27 is stopped. The control circuit 31 A / D-converts the read information and recognizes a monochrome pattern.

Further, the control circuit 31 outputs the output terminal LEDON.
1 is set to "L" level, the operation of the constant current circuit 55 is stopped, and the LEDs 12D and 13 of the photo reflectors 12 and 13 are stopped.
The D switch is turned off and the analog switches 57 and 58 are turned off (S1005).

After this, the control circuit 31 outputs the output terminal LEDO.
N2 is set to "H" level to operate the constant current circuit 56,
The LEDs 29D and 30D of the photo reflectors 29 and 30 are turned off and the analog switches 59 and 60 are turned on (S1006). Then, the leading edge of the film 1 is taken out from the cartridge 4 and an operation for winding the film 1 around a film winding member (not shown) is performed. In this operation, the movable light-blocking opening / closing operation section 5 is operated to open the movable light-blocking window, and then the motor 27 is operated.
Is rotated in the direction in which the film 1 comes out of the cartridge 4, the spool shaft 8 is rotated through the film rewinding joint member 25, and the leading end of the film 1 is pulled out from the cartridge 4. When the film 1 comes out of the cartridge 4, the film 1 passes through the opposed positions of the photo reflectors 29 and 30, and is wound around a film winding member (not shown). When the film is conveyed to a predetermined position, the rotation of the motor 27 is stopped. , Film loading is completed (S10
07).

Here, the position of the film 1 is detected by the photo reflectors 29 and 30.
It is performed by detecting a, 2b, 2c, 2d ... At this time, the LED 2 of the photo reflector 29, 30
Analog switches 59 and 60 when 9D and 30D are lit
Is turned on, the phototransistor 29
The outputs of T and 30T are the input terminals ADI of the control circuit 31, respectively.
After being input to N1 and ADIN2 and subjected to A / D conversion, the control circuit 31 detects the output state of the photo reflectors 29 and 30 to detect the position of the film 1. Then, the control circuit 31 sets the output terminal LEDON2 to the “L” level, stops the operation of the constant current circuit 56, turns off the LEDs 29D and 30D, turns off the analog switches 59 and 60 (S1008), and sets the cartridge 4 to the camera. After loading, the film loading operation ends.

Next, the operation of the configuration shown in FIG. 9 at the time of film winding after photographing is described. When winding the film, the control circuit 31 outputs the output terminal LEDO.
N2 is set to "H" level, the constant current circuit 56 is operated,
The LEDs 29D and 30D are turned on, and the photo reflector 2
Motor 2 while detecting the film position using 9, 30
The film winding operation is executed by rotating 7 in the film winding direction and feeding the film 1 until the film 1 reaches a predetermined position. After the winding operation is completed, the voltage of the output terminal LEDON2 of the control circuit 31 is set to the “L” level, and the winding operation is completed.

As described above, when the film information of the cartridge 4 is read, L of the photo reflectors 12 and 13 is read.
The EDs 12D and 13D are turned on and the analog switches 58 and 59 are turned on to turn on the photo reflectors 12 and 13.
To read the film information and move the film such as film loading, film winding, rewinding, etc., the LEDs of the photo reflectors 29 and 30.
29D and 30D are turned on and the analog switch 5
The positions of the film and the moving speed are detected by turning on 9, 60.

In the above embodiment, the photoreflector is used to detect the information on the film and the perforation, but a photointerrupter or other optical detecting means may be used instead.

In the above embodiment, the description has been limited to the detection of the information on the film and the detection of the perforation.
The present invention is not limited to this, and can be applied to all configuration examples in the case where the number of inputs of the detection circuit (or processing circuit) is smaller than the number of detection means.

[Correspondence between Invention and Embodiment] In the above embodiments, the operation of the control circuit 31 corresponds to the control means, the photoreflectors 12 and 13 serve as the first detection means, and the photoreflectors 29 and 30 serve as the second detection means. Constant current circuit 4
2, 43, 46, 55, 56 and analog switch 4
7, 48, 48, 49, 57, 58, 59, 60 correspond to the selection means.

[0080]

According to the first aspect of the present invention, a plurality of optical detecting means for detecting reflected light or passing light from a detection target, which includes a light emitting element and a light receiving element, and the number of the detecting means are provided. Control circuit that has less input units and A / D converters connected to the input units and performs detection processing, and outputs of the corresponding detection unit among the plurality of detection units according to the content to be detected. Selecting means having at least one of means for selectively driving the light emitting element of the corresponding detecting means among the plurality of detecting means according to the content to be selected or input to the control circuit. Since the configuration is provided, only the information from one detection unit can be applied to one input unit, the number of required A / D converters can be reduced, and the limited input of the A / D converter is effective. To use Door can be.

According to the second aspect of the present invention, the light emitting element and the light receiving element are provided, and at least one first detecting means for optically reading the pattern on the rotating disk, and the light emitting element and the light receiving element are provided. At least one second detection means for optically detecting the perforation of the film in the portion pulled out from the film cartridge, and turning on the light emitting element of the first detection means when reading data from the rotary disk. And a control means for turning off the light emitting element of the second detecting means, turning off the light emitting element of the first detecting means and turning on the light emitting element of the second detecting means when detecting the perforation. With the configuration, the number of required A / D converters can be reduced, and the limited input of the A / D converter can be effectively used.

According to the third aspect of the present invention, a detection circuit for detecting data or the perforation is provided for the output of each of the optical detection means, and the output portions of the plurality of detection means are connected in parallel. However, since this is connected to one input terminal of the detection circuit, the limited input of the A / D converter can be effectively used with a simple configuration.

According to the fourth aspect of the present invention, each of the detecting means has a structure using a photo reflector or a photo interrupter, so that the optical detecting means can be realized with a simple structure.

According to the invention described in claim 5, at least one first detecting means for optically reading the pattern on the rotating disk, comprising the light emitting element and the light receiving element, and the light emitting element and the light receiving element are provided. At least one second detection means for optically detecting the perforation of the film pulled out from the film cartridge, and data relating to the film based on each output of the first detection means and the second detection means. A circuit for detecting perforation and an input of the output of the first detecting means to the circuit when reading data from the rotating disk, and an output of the second detecting means for detecting the perforation. Since it is configured to include a control means for inputting to the A / D converter, the number of necessary A / D converters can be reduced, and the limited A / D converter can be used. It is possible to effectively utilize the input of data.

According to the sixth aspect of the invention, each of the detection means has a structure using a photo reflector or a photo interrupter. Thereby, the optical detection means can be realized with a simple configuration.

According to the seventh aspect of the present invention, the light emitting device and the light receiving device are provided, and at least one first detecting means for optically reading the pattern on the rotating disk, and the light emitting device and the light receiving device are provided. At least one second detection means for optically detecting the perforation of the film pulled out from the film cartridge, and data relating to the film based on each output of the first detection means and the second detection means. A circuit for detecting perforation, and turning on the light emitting element of the first detecting means when reading data from the rotating disk, and
The light emitting element of the detecting means is turned off, and the light emitting element of the first detecting means is turned off at the time of detecting the perforation, and the output of the first detecting means is selectively input to the circuit to prevent the perforation. When detecting, the light emitting element of the first detecting means is turned off, the light emitting element of the second detecting means is turned on, and the control means for inputting the output of the second detecting means to the circuit is provided. With this configuration, the number of required A / D converters can be reduced, and the limited input of the A / D converter can be effectively used. Further, since it is possible to turn off the light emitting element when there is no need, it is possible to save energy.

According to the eighth aspect of the present invention, each of the detecting means has a structure using a photo reflector or a photo interrupter. Therefore, the optical detecting means can be realized with a simple structure. it can.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of an embodiment of a camera according to the present invention.

FIG. 2 is a plan view showing the structure of a film.

FIG. 3 is a plan view showing a cartridge 4.

FIG. 4 is a block diagram showing a configuration of an electric system of the camera.

FIG. 5 is a circuit diagram showing details of the connection relationship between the detection means and the detection circuit according to the present invention.

FIG. 6 is a flowchart showing the operation of the circuit of FIG.

FIG. 7 is a circuit diagram showing a second embodiment of the detection means and the detection circuit according to the present invention.

FIG. 8 is a flowchart showing an operation of the configuration of FIG.

FIG. 9 is a circuit diagram showing a third embodiment of the detection means and the detection circuit according to the present invention.

FIG. 10 is a flowchart showing an operation of the circuit of FIG.

FIG. 11 is a circuit diagram showing a configuration example of a conventional detection unit and a detection circuit.

[Explanation of symbols]

1 Film 2a, 2b, 2c, 2d Perforation 3 Magnetic recording unit 4 Cartridge 5 Movable light-shielding opening / closing operation unit 6 Film information display unit 7 Movable light-shielding window 8 Spool shaft 9 Window 10 Magnetic head 12, 13, 29, 30 Photo reflector (Optical) 27 Motor 12D, 13D, 29D, 30D LED (light emitting diode) 12T, 13T, 29T, 30T Phototransistor 31 Control circuit 42, 43, 46, 55, 46 Constant current circuit 47, 48, 49, 50, 57, 58, 59, 60 Analog switch ADIN1, ADIN2 input terminal LEDON1, LEDON2 output terminal

Claims (8)

[Claims] 1. A plurality of optical detection means provided with a light emitting element and a light receiving element for detecting reflected light or passing light from an object to be detected, and an input section less than the number of the detection means and connected to this input section. And a control circuit for performing a detection process and the like including the A / D converter, and selecting the output of the corresponding detection means of the plurality of detection means according to the content to be detected and inputting it to the control circuit, or A detecting device comprising at least one of means for selecting and driving a light emitting element of a corresponding detecting means among the plurality of detecting means according to the content to be detected. 2. A function of reading the data on a rotating disk provided in a film cartridge which rotates with the movement of the film by a reading means and detecting the perforation on the film to detect the position or moving speed of the film. In the camera, at least one first detection means that includes a light emitting element and a light receiving element to optically read the pattern on the rotating disk, and a portion that includes the light emitting element and the light receiving element and is pulled out from the film cartridge. At least one second detection means for optically detecting the perforation of the film, and turning on the light emitting element of the first detection means when reading data from the rotary disk, and at the same time, of the second detection means. The light emitting element is turned off, and when the perforation is detected, the light emitting element of the first detecting means is turned off. And, a camera, characterized by a control means for turning on the light emitting element of the second detecting means. 3. A detection circuit for detecting data or the perforation with respect to the output of each of the optical detection means is provided, and output parts of the plurality of detection means are connected in parallel. The camera according to claim 2, wherein the camera is connected to one input terminal. 4. The detection means is a photoreflector or a photointerrupter.
The listed camera. 5. A function of reading data on a rotating disk provided in a film cartridge that rotates with the movement of the film by a reading means and detecting a perforation on the film to detect a position or a moving speed of the film. In the camera, at least one first detecting means that includes a light emitting element and a light receiving element to optically read the pattern on the rotating disk, and a portion that includes the light emitting element and the light receiving element and is pulled out from the film cartridge. At least one second detection means for optically detecting perforation of the film; a circuit for detecting data or perforation relating to the film based on outputs of the first detection means and the second detection means; When reading data from the rotating disk, the output of the first detection means is sent to the circuit. It is a force, a camera in detecting the perforations, characterized in that and a control means for receiving the output of said second detecting means to said circuit. 6. The detection means is a photo reflector or a photo interrupter.
The listed camera. 7. A function of reading data on a rotating disk provided in a film cartridge which rotates with the movement of the film by a reading means and detecting a perforation on the film to detect a position or a moving speed of the film. In the camera, at least one first detection means that includes a light emitting element and a light receiving element to optically read the pattern on the rotating disk, and a portion that includes the light emitting element and the light receiving element and is pulled out from the film cartridge. At least one second detection means for optically detecting perforation of the film; a circuit for detecting data or perforation relating to the film based on outputs of the first detection means and the second detection means; When reading data from the rotating disk, the light emitting element of the first detecting means is turned on. In addition, the light emitting element of the second detecting means is turned off, the light emitting element of the first detecting means is turned off when the perforation is detected, and the output of the first detecting means is selectively input to the circuit. When detecting the perforation, the light emitting element of the first detecting means is turned off, the light emitting element of the second detecting means is turned on, and the output of the second detecting means is input to the circuit. And a control unit for controlling the camera. 8. The detection means is a photoreflector or a photointerrupter.
The listed camera.