JPH0862662A - Camera - Google Patents

Abstract

PURPOSE: To provide a camera for preventing film information, etc., stored by a RAM, etc., in a control circuit from being erased even in the case a battery for a camera is replaced. CONSTITUTION: As for the camera capable of using a film cartridge 102 equipped with an information recording disk 104 which can be rotated integrally with a cartridge spool shaft 103 and for presenting the information peculiar to the film, and constituted so that the leading end part of the film may be fed out of the cartridge 102, the camera is provided with a driving means 101 for feeding out the leading end part of the film housed in the cartridge 102, a data detecting means 105 for reading the film information from the information recording disk 104 for the cartridge 102 loaded on the camera, and a nonvolatile storing means 107 for storing the read film information, and when the cartridge 102 is loaded on the camera, the leading end part of the film is fed out of the cartridge 102, also, the film information is read out, and then, the data is written in the nonvolatile storing means 107.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a camera, more specifically, a film cartridge having a disc-shaped code plate for indicating information peculiar to the film in the film cartridge, and a film cartridge in which the leading end portion of the film is housed. It is related to the camera.

[0002]

2. Description of the Related Art In recent years, there has been proposed a film cartridge having an information recording disk which rotates integrally with a spool shaft in the film cartridge and records information relating to the film as, for example, bar code information. In a camera using such a film cartridge, when the film stored in the film cartridge is initially sent out, the bar code information recorded on the information recording disk or the like is detected, for example, by an optical detecting means or the like. Various types of documents that have been read have been conventionally proposed.

For example, in a film cartridge disclosed by US Pat. No. 5,032,854 and a camera using this film cartridge, peculiar information regarding the film, which is rotatable integrally with a spool shaft provided inside the film cartridge, etc. When it is detected that the film cartridge is loaded in the camera body, it has an information recording disk in which the The spool shaft is rotated, and the film wound and stored on the spool shaft is sent out to the outside of the film cartridge. Then, in association with the initial feeding operation of the film, information on the film recorded on the information recording disk provided in the film cartridge,
That is, the information corresponding to the DX code or the like provided on the outer peripheral surface of the conventional film cartridge, which is unique to the film stored in each film cartridge, is read out. In addition, this USP
No. 5,032,854 does not describe in detail how to handle the film information and the like read as described above, but as described above, it is usually peculiar to the film read from the information recording disk or the like. Information is stored in a RAM (writable memory) of a control circuit (microcomputer or the like) including a CPU or the like provided inside the camera so that the information on the film can be used at the time of taking a photograph. What is done is common.

[0004]

However, in general,
A battery or the like is used as the main power source of the camera, and the power supply terminal of the control circuit including the CPU and the like provided in the camera body is replaced by the battery replacement or the like performed when the power battery or the like is exhausted. If a voltage drop occurs,
The unique information about the film loaded in the camera body stored in the RAM of the control circuit will be lost.

That is, according to the means disclosed in the above-mentioned US Pat. No. 5,032,854, when the film is loaded into the camera body and the film is initially fed out from the film cartridge, the above-mentioned operation is interlocked with the above. Unique information about the film is read from the information recording disk in the film cartridge, and is further stored in the RAM or the like of the control circuit in the camera body. At this time, if the power supply battery, which is the main power supply of the camera, is replaced, a voltage drop occurs at the power supply terminal of the control circuit, and the information about the film is lost.

Therefore, when the power source battery, which is the main power source of the camera, is replaced, it is necessary to read the information about the film from the information recording disk in the film cartridge again. Dots occur.

Further, since the above-mentioned information recording disk is arranged so as to rotate integrally with the spool shaft in the film cartridge, the operation of reading information about the film is performed in the camera body during filming. In the case where is loaded, the film wound around the spool shaft will be sent out by the rotation operation of the spool shaft and the information recording disk in the film cartridge. At this time, in order to make the exposed frames on the film continuous, it is necessary to rewind the fed several films into the film cartridge, which complicates the operation sequence of the camera. At the same time, there is a problem that the operation is wasted.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a memory (RAM) in a control circuit provided in the camera body even when the battery, which is the main power source of the camera, is replaced. ) And the like, there is provided a camera in which the information about the film read from the information recording disk or the like is not lost.

[0009]

The camera according to the present invention comprises:
In a camera that has a disc-shaped code plate that can rotate together with the cartridge spool shaft and that represents information unique to the film, and that can use a film cartridge configured to feed the film front end from the cartridge,
Driving means for sending out the leading end of the film contained in the cartridge, reading means for reading film information from the disc-shaped code plate of the loaded film cartridge, and non-volatile memory for storing the read film information. And storing the film information in the non-volatile storage means when the film cartridge is loaded into the camera, the film tip is sent out from the cartridge, and the film information is read out. In a camera that can be used with a film cartridge that has a status indicator that is provided at one end of the cartridge and that changes the display content according to the exposure status of the built-in film, and that is configured to send out the leading end of the film , The tip of the film stored in the cartridge And a reading means for reading the exposure status information from the status indicator of the loaded film cartridge, and a non-volatile storage means for storing the read film information. When the film is loaded into the camera, the leading end of the film is sent out from the cartridge, the exposure state information is read, and the data is written in the nonvolatile storage means.

Then, at least the loaded camera is used in a camera having an information display member for displaying a plurality of information about the film in a part of the cartridge and configured so that the leading end of the film is sent out from the cartridge. When the film cartridge is loaded into the camera, it comprises a film feeding means for feeding the film, an information reading means for reading the plurality of information, and a non-volatile storage means for storing the read film information. The film front end is sent out from the cartridge, and the read film information is stored in the non-volatile storage means.

That is, in the camera according to the present invention, as shown in the conceptual diagram of FIG. 1, a film cartridge 102 for accommodating a film and a cartridge spool shaft 103 provided in the film cartridge 102 and around which the film is wound. An information recording disc 104, which is a disc-shaped code plate on which film information unique to the film cartridge 102 is recorded, is rotatably provided integrally with the cartridge spool shaft 103.

Further, in response to a film (cartridge) loading detecting means 100 for detecting that the film cartridge 102 is loaded in the camera body, and an output signal from the film loading detecting means 100, the film cartridge is loaded. By rotating the cartridge spool shaft 103 inside the film cartridge 102,
The film inside is recorded on the information recording disk 104 which rotates integrally with the motor driving means 101 for feeding the film out of the film cartridge 102 and the cartridge spool shaft 103 rotated by the rotational driving of the motor driving means 101. Data detecting means 105 which is a reading means for reading the film information etc.
By controlling the film information and the like read by the data detecting means 105 by the data storage control means 106, the storage means 107 is a non-volatile storage means for storing the film information and the like.

[0013]

When the film cartridge is loaded into the camera, the leading end portion of the film stored in the film cartridge is initially fed by the driving means (motor driving means), and the initial feeding operation of the film is linked. ,
The reading means (data detecting means) reads the unique information about the film from the disc-shaped code plate (information recording disc) in the film cartridge loaded in the camera body. Then, the read unique information about the film and the like are stored in the non-volatile storage unit (storage unit).

The non-volatile memory means has the above-mentioned control circuit even if a voltage drop or the like occurs in the power supply terminal of the control circuit in the camera body when the power supply battery which is the main power supply of the camera is replaced. The contents stored in the RAM are retained.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. First, prior to the description of the embodiments of the present invention, the film cartridge used in the camera of the present invention will be described.

FIG. 5A is a perspective view showing the outer appearance of a film cartridge used in the camera of the present invention.
FIG. 5B shows a perspective view when the bottom side of the film cartridge is placed on the upper side. In addition, FIG.
FIG. 7 is a central longitudinal cross-sectional view of the film cartridge, and FIG. 7 is a diagram showing a state in which a film contained in the film cartridge is pulled out to the outside of the film cartridge.

In this film cartridge, the film spool rotates integrally with the cartridge spool shaft disposed in the center of the film cartridge, and the peculiar information on the film contained in the film cartridge is recorded by symbolization or the like. It has a disc-shaped code plate which is an information recording disc.

That is, as shown in FIGS. 5 and 6, a cartridge spool shaft 2 is rotatably supported inside the film cartridge 1, and a film 6 is wound around the cartridge spool shaft 2. It is stored. Further, the cartridge spool shaft 2 is provided so that its upper end portion protrudes above the outside of the film cartridge 1, and when the film cartridge 1 is loaded in the camera body (not shown), the camera It is adapted to engage with a fork portion (not shown) provided on the body side. A film delivery port 5 for delivering the film 6 from the inside of the film cartridge 1 to the outside is formed along the width direction on the outer peripheral side of the film cartridge 1.

Further, as shown in FIG. 6, a disc-shaped code plate 3 as an information recording disc is integrally formed in a flange shape on the upper portion of the cartridge spool shaft 2 in the film cartridge 1. Information regarding the film 6 stored in the film cartridge 1 is recorded on the disc-shaped code plate 3 as bar code information and the like. The bar code information on the upper surface of the disc-shaped code plate 3 includes As shown in FIG. 5 (a), the start bit 4 which is set wider than other bar code patterns is provided.

Further, as shown in FIG. 6, at the end portion on the bottom side of the cartridge spool shaft 2 of the film cartridge 1, the display content is changed corresponding to the film 6 stored in the film cartridge 1. The exposure state indicator plate 7, which is a state indicator and an exposure state indicator,
Similar to the disc-shaped code plate 3 described above, it is integrally formed in a flange shape. On the surface of the exposure state indicating plate 7,
As shown in FIG. 5 (b), black and white patterns are arranged, and the exposure state indicating plate 7 is rotated inside the film cartridge 1 according to the rotating position in association with the film feeding operation. It is possible to identify the exposure state of the film 6 stored in the.

Then, as shown in FIG. 7, on the film 6 housed in the film cartridge 1, there is provided an exposure section which is a frame for exposing the image of each frame. This exposure unit is, for example, the first frame exposure unit 13,
The second frame exposure section 14, the third frame exposure section 15 and the like are arranged respectively.

Further, at one end portion in the width direction of the film 6, outside the screen frame of the exposure portion (13 to 15) of each frame, for example, one perforation 1 for each frame.
0, 11, 12, etc. are drilled. The perforations 10 to 12 are provided to position the exposure parts (13 to 15) of the respective frames corresponding to the respective frames with respect to predetermined positions on the camera body side.

The distance L between the leading edge of the leader 16 which is the tip of the film 6 and the frame 17 on the tip side of the first frame exposure section 13 is set to a predetermined distance. It is set. Further, in FIG. 7, an arrow A indicates the film feeding direction.

FIG. 2 is a block diagram showing the construction of the main part of the camera of one embodiment of the present invention. FIG. 3 is a top view of the construction of the main part of the camera of FIG. Is shown in FIG.

As shown in FIG. 2, a fork portion 20 is provided in a film cartridge storage chamber (not shown) in the camera body so as to project from a ceiling surface or a floor surface thereof. Is designed to engage with the upper end of the cartridge spool shaft 2 of the film cartridge 1 when the film cartridge 1 is loaded in the film cartridge storage chamber.

Further, on the side of the camera body at the position facing the bar code pattern surface on the surface of the disc-shaped code plate 3 in the film cartridge 1 where the film information and the like are recorded, the disc-shaped code plate is provided. 3 is a reading means for reading the information peculiar to the film recorded on the film No. 3, and a photoreflector (P
R) 21 is provided.

Then, the exposure state indicator is provided on the camera body side at a position opposed to the black and white pattern surface provided on the surface of the exposure state indicator plate 7 provided on the bottom side of the film cartridge 1. It is a state detecting means for reading out the display of the exposure state of the film 6 accommodated in the film cartridge 1 and instructed by the pattern on the plate 7 and detecting the state of the exposure state indicating plate 7 which is the state indicator. Photo interrupter (PI) 31, 3
2 are provided.

On the other hand, a photographing opening (aperture) 27 is provided in the rear part of the photographing optical axis in the middle of the camera body, and the photographing opening 27 exposes one frame of the film 6. It has an area corresponding to a portion (for example, the first frame exposure portion 13 or the like). A film winding chamber (not shown) is provided at the other end of the camera body on the opposite side of the film cartridge accommodating chamber, sandwiching the photographing opening 27.
In the film winding chamber, a winding spool 22 for winding the exposed film 6 sent from the film cartridge 1 is rotatably supported.

In the vicinity of the photographing opening 27,
A film feeding motor 23, which is a driving source and driving means, is provided for the initial feeding, winding, and rewinding operations of the film 6 in the film cartridge 1, that is, the film feeding. The driving force of the feeding motor 23 is changed according to the rotation direction of the switching mechanism 2
4, the transmission direction can be switched, and the driving force of the film feeding motor 23 is the driving force transmission mechanism 2
5 or 26, the fork portion 20 and the film cartridge spool shaft 2 or the spool shaft 2
It will be transmitted to 2. Therefore, by the driving force of the film feeding motor 23, the film 6 in the film cartridge 1 is initially fed and the film is wound or rewound.

On the other hand, a perforation is provided at a position facing the perforations 10 provided at one end in the width direction on the film 6 and near the film feeding path (not shown) on the camera body side. A photo interrupter 30, which is a detecting means, is provided. This photo interrupter 30, as shown in FIG.
0a and the light receiving portion 30b are arranged so as to face each other with the film 6 interposed therebetween.

When the film 6 is fed, by detecting the feeding amount of the film 6, it is possible to feed one frame of the film 6, for example. There is. That is, in the initial feeding of the film 6 from the film cartridge 1 performed after the film cartridge 1 is loaded into the camera body, or the winding operation of the film 6 after taking a photograph, When the required amount of the film 6 is fed, the perforations 1 corresponding to the respective frames are
When 0-12 or the like is detected by the photo interrupter 30, the film feeding motor 23 is prohibited from driving and the film feeding operation is stopped.

The film feeding operation in the camera of the above-described one embodiment constructed as above will be briefly described below with reference to FIGS. First, the film cartridge 1 is loaded into the camera body (not shown), and the operation such as closing the rear lid of the camera body is performed, so that the film cartridge 1 is loaded into the camera body. When it is detected by, for example, a rear lid detection switch (described later) which is a loading detection unit provided to detect loading of the film cartridge 1,
The film feeding motor 23 rotates in the first direction, which is the initial feeding direction of the film 6 in the film cartridge 1. Thereby, the film feeding motor 2
3 is transmitted to the fork portion 20 via the switching mechanism 24 and the driving force transmission mechanism 25, and the cartridge spool shaft 2 of the film cartridge 1 is transferred to the fork portion 20 of FIG.
In, rotate clockwise (CW direction).

The driving force of the film feeding motor 23 is transmitted through the switching mechanism 24 and the transmission mechanism 26.
It is transmitted to the take-up spool 22 in the camera body,
Similarly, the take-up spool 22 is also rotated clockwise (CW direction) in FIG.

Therefore, the cartridge spool shaft 2 around which the film 6 in the film cartridge 1 loaded in the film cartridge storage chamber is wound is driven by the rotational driving force of the film feeding motor 23 in the first direction. The film 6 is fed from the inside of the film cartridge 1 by being rotated in the CW direction.

Then, the leader portion 16 of this film 6
However, when it winds around the winding spool 22 provided in the film winding chamber in the camera body, the winding spool 22
As described above, like the cartridge spool shaft 2, the film 6 is rotated in the CW direction by the rotational driving force of the film feeding motor 23 in the first direction. By winding the film around the spool 22, the film winding operation is performed.

At this time, the switching mechanism 24 and the driving force transmission mechanisms 25, 26 are arranged so that the film winding speed by the rotation of the winding spool 22 becomes faster than the film feeding speed by the rotation of the fork portion 20. Is set by. Therefore, after the film 6 in the film cartridge 1 is wound around the take-up spool 22 in the camera body, the film 6 includes the cartridge spool shaft 2, the fork portion 20, and the transmission mechanism 25 in the above-described manner. Although it is rotated at a speed higher than the drive speed of the film feeding motor 23, the transmission mechanism 25 is set so as to idle with respect to the rotation in the CW direction. The film feeding speed difference between the take-up spool 22 and the cartridge spool shaft 2 is absorbed.

On the other hand, when the film 6 stored in the film cartridge 1 is exposed by a photographing operation, it is entirely wound up on the take-up spool 22 side in the camera body, and the final frame of the film 6 is taken up. Is detected, the film feeding motor 23 is rotated in the second direction which is the film rewinding direction. At this time, the driving force of the film feeding motor 23 is transmitted through the switching mechanism 24 and the transmission mechanism 25 to the fork portion 2 described above.
0, the cartridge spool shaft 2 is rotated in the counterclockwise direction (CCW direction), and the transmission of the driving force between the take-up spool 22 and the transmission mechanism 26 is cut off. 22 is in a state where it can freely idle.

Therefore, the exposed film 6 wound on the take-up spool 22 pivotally supported in the film take-up chamber in the camera body is rewound into the film cartridge 1. Becomes

FIG. 4 is a view showing each state of the exposure state indicating plate 7 provided on the bottom side of the film cartridge 1, where (a) is an “unexposed position” and (b) is a “partial exposure”. Positions "and (c) are diagrams showing respective states of the exposure state indicating plate 7 at" all exposure positions ".

As shown in FIG. 4 (a), when the contained film 6 is unused and has not been exposed at all, that is, a new film film cartridge 1
In the case where the film 6 is loaded in the film cartridge loading chamber in the camera body and the film 6 is completely stored in the film cartridge 1, the exposure state indicating plate 7 is in the “unexposed state”. In position. That is, the exposure state indicating plate 7 detects the display patterns of "black" and "white", respectively, at the positions facing the photo interrupters 31 and 32 arranged on the camera body side. ing.

Further, as shown in FIG. 4B, the film cartridge 1 in which the film 6 in the case where the film 6 contained therein is exposed halfway and is rewound midway is the camera body is In the case where the film 6 is loaded in the film cartridge loading chamber of the inside and the film 6 is completely stored in the film cartridge 1, the exposure state indicating plate 7 is in the “partial exposure position”.
It is in. That is, the exposure state indicating plate 7 is provided with the photo interrupters 31, 3 arranged on the camera body side.
Display patterns of "black" and "black" are detected at the positions opposite to 2, respectively.

Then, as shown in FIG. 4C, the film cartridge 1 in which all the frames of the stored film 6 have been photographed and all the frames have been exposed is the film cartridge 1 storing the film. In the case where the film 6 is loaded in the film cartridge loading chamber in the camera body and the film 6 is completely accommodated in the film cartridge 1, the exposure state indicating plate 7 is set to "all exposure positions". It is in. That is, the exposure state indicating plate 7
The display patterns of "white" and "black" are detected at positions facing the photo interrupters 31 and 32 arranged on the camera body side, respectively.

FIG. 8 is an electric circuit diagram showing a control circuit in the camera of the above embodiment. Hereinafter, the control circuit will be described along the flow of signals.

As shown in FIG. 8, the power source voltage of the power source battery 50 is boosted to a predetermined constant voltage by the booster circuit 52.
It is applied to a CPU (microcomputer) 51 and the like that controls the entire camera. The CPU 51 is provided with a plurality of input / output terminals C1 to C12, and the input terminal C
Reference numeral 1 denotes a loading detection means provided on the back surface of the camera body for detecting the opening / closing of a rear lid (not shown) for loading / unloading the film cartridge 1 and detecting loading of the film cartridge 1. The rear lid detection switch 63 is electrically connected. The input terminal C1 is pulled up via a pull-up resistor 53. Then, the rear lid detection switch 63 is set so as to be in an ON state when the rear lid is in an open state and to be in an OFF state when the rear lid is in a closed state. .

Further, the output terminal C2 and the input terminal C3 of the CPU 51 are provided for reading information unique to the film such as bar code information provided on the disk-shaped code plate 3 in the film cartridge 1. The above described photo reflector 21 is electrically connected. The light emitting diode 64 in this photo reflector 21
Of the phototransistor 65 in the photoreflector 21 has its collector electrically connected to the input terminal C3, while its anode side is electrically connected to the output terminal C2 through the current limiting resistor 54. And
Further, it is pulled up through the pull-up resistor 55.

Further, the output terminal C4 and the input terminal C5 of the CPU 51 are electrically connected to the photo interrupter 30 including a light emitting portion 30a and a light receiving portion 30b provided for detecting the film feeding amount. Has been done. The light emitting diode 66 in the photo interrupter 30 has its anode side electrically connected to the output terminal C4 through a current limiting resistor 56, and the photo transistor 67 in the photo interrupter 30 has its collector. Are electrically connected to the input terminal C5 and are pulled up via the pull-up resistor 57.

The output terminal C of the CPU 51
6 and the input terminal C7, and the output terminal C8 and the input terminal C9
Includes a photo interrupter 3 for reading information from the exposure state indicating plate 7 described in FIG.
1, 32 are electrically connected to each other. Photodiodes 68 in the photointerrupters 31, 32,
The anode side of 70 is electrically connected to the output terminals C6 and C8 via current limiting resistors 58 and 60, and the photo interrupters 31 and 32 are also connected.
The phototransistors 69 and 71 therein have their collectors electrically connected to the input terminals C7 and C9, and are pulled up via pullup resistors 59 and 61.

The photo interrupters 31, 32 are
When the display pattern of the exposure state indicating plate 7 facing each other is “white”, each phototransistor 69,
71 is turned on, and the input terminals C7, C
A signal of “L” (low; Low) level is input to 9.

Further, the photo interrupters 31, 32 are
When the display pattern of the exposure state indicating plate 7 facing each other is “black”, each phototransistor 69,
71 is turned off, and the input terminal C7,
A signal of "H" (high) level is input to C9.

Further, the input terminal C10 of the CPU 51 is
The film cartridge detection switch (SW) 75
Are electrically connected and are pulled up via a pull-up resistor 76. When the film cartridge 1 is loaded in the camera body, the film cartridge detection SW 75 is turned off (OF
F) state, a signal of "H" level is input to the input terminal C10, and when the film cartridge 1 is not loaded in the camera body, the film cartridge detection SW75 is turned on ( In the ON state, the "L" level signal is input to the input terminal C10.

Further, the output terminal C11 of the CPU 51,
Input terminals M1 and M2 of a motor driver 72 for driving the film feeding motor 23 are connected to C12, and a signal for controlling the motor driver 72 is output. The output terminals M4 and M5 of the motor driver 72 are connected to the input / output terminals of the film feeding motor 23, and the terminals M3 and M6 of the motor driver 72 are connected to the power supply battery 51. The + (plus) side terminal and the- (minus) side terminal are respectively connected.

Here, the output terminal C1 of the CPU 51 is
The voltage levels of C1 and C12, that is, "L" or "H" level signals and the control state of the film feeding motor 23 are set as shown in Table 1.

[0053]

[Table 1] In Table 1, "HiZ" represents a high impedance state.

On the other hand, a memory 73, which is a non-volatile storage means for storing various data such as film information, is provided in the control circuit provided in the camera body.
It is electrically connected to the CPU 51. The memory 73 stores the information peculiar to the film read from the disc-shaped code plate 3 and the exposure state indicating plate 7 of the film cartridge 1 and the like. When the replacement of the power supply battery 50 is performed due to the consumption of the power supply battery 50, the stored film-specific information due to the voltage drop of the power supply terminal when the power supply battery 50 is removed from the control circuit of the camera, etc. The data is formed by, for example, a non-volatile memory (EEPROM) or the like so that the data of No.

Further, the CPU 51 is electrically connected to a display means 74, which is arranged outside the camera body and is composed of, for example, an LCD (liquid crystal panel). It is supposed to be displayed.

9 and 10 show the operation of the camera of the above-described embodiment, that is, after it is detected that the film cartridge 1 is loaded in the camera body and the rear lid of the camera body is closed. The film information and the like based on the bar code information and the like of the disc-shaped code plate 3 and the exposure state indicating plate 7 of the film cartridge 1 are read, and the film 6 is initially fed and automatically fed (autoloading) such as winding.
FIG. 9 is a flowchart showing an operation when the process is performed, and FIG. 9 shows an automatic film feeding (autoload) operation.
0 indicates a bar code reading operation such as film information. The operation of the camera of the above-described embodiment will be described below with reference to the flowcharts of FIGS.

As shown in FIG. 9, in order to perform the automatic feeding (autoloading) operation of the film 6 from the inside of the film cartridge 1, first, in step S1, the CP
The input signal of the input terminal C1 is monitored by U51. When the input signal of the input terminal C1 is switched from the "L" level signal to the "H" level signal, it is determined that the rear lid of the camera body is closed, and the process proceeds to step S23. The process of step S1 is repeated until the input signal of the input terminal C1 switches from the "L" level signal to the "H" level signal.

Next, in step S23, it is judged whether or not the film cartridge 1 is loaded in the camera body. That is, the film cartridge detection SW 75 connected to the input terminal C10 of the CPU 51 detects the film cartridge 1 in the camera body and determines that the film cartridge 1 is loaded in the camera body. In this case, the film cartridge detection SW 75 is turned off, the "H" level signal is input to the input terminal C10, and the process proceeds to the next step S2.

On the other hand, when it is determined that the film cartridge 1 is not loaded in the camera body, the film cartridge detection SW 75 is turned on, and the input terminal C10 is set to the "L" level. A signal is input, and the process returns to step S1.

In step S2, the CPU
An "H" level signal is output from the output terminals C6 and C8 of 51, and the photodiodes 68 and 70 in the photo interrupters 31 and 32 are brought into an operating state, whereby the exposure state indicating plate 7 in the film cartridge 1 is exposed. The preparation state in which the information can be read is set, and the process proceeds to step S3.

Next, in step S3, the CPU
The state of the input terminals C7 and C9 is monitored by 51, the input terminal C7 becomes "L" level, and
When the input terminal C9 is at "H" level, the bar code information of the exposure state indicator 7 of the film cartridge 1, that is, the display pattern on the exposure state indicator 7 is "white" and It is detected that the display pattern is "black". This is shown in FIG.
Since it is located at the position described by, that is, the "entire exposure position", the process proceeds to the next step S19, and in this step S19, by setting the output terminals C6 and C8 to "L" level, Photodiode 6
8, 70 are turned off. And the next step S
At 20, the CPU 51 sends a control signal to the display means 74, and the display means 74 causes the “EXP
A display such as "OSED", that is, a warning display that the film 6 in the film cartridge 1 has been completely exposed is displayed (ON).

Then, in step S21, the CP
U51 monitors the input terminal C1 and determines that the rear lid of the camera body is opened when the input signal of the input terminal C1 is switched from the "H" level signal to the "L" level signal, In the next step S22, in this step S22, the display of the warning display "EXPOSED" and the like on the display means 74 is canceled (OFF (OF
After F)), the process returns to step S1. In addition,
In step S21, the process of step S21 is repeated until the input signal of the input terminal C1 switches from the "H" level signal to the "L" level signal.

On the other hand, when the state of the input terminals C7 and C9 of the CPU 51 is monitored at the step S3 and the input terminal C7 is at the "L" level and the input terminal C9 is not at the "H" level, Proceeds to the processing of the next step S4. This step S4
In the case where both the input terminals C7 and C9 are at "H" level, the bar code information of the exposure state indicating plate 7 of the film cartridge 1, that is,
It is detected that the display patterns on the exposure state indicating plate 7 are "black" and "black" display patterns, respectively. Since this is the position described with reference to FIG. 4B, that is, the "partial exposure position", the process proceeds to the next step S6, and this step S6 is performed.
In step S7, after setting the E flag,
Go to processing.

In step S4, the input terminal C7 is at "H" level and the input terminal C9 is
When it is not "H" level, the bar code information of the exposure state indicating plate 7, that is, the display pattern on the exposure state indicating plate 7 is the display pattern of "white" and "white", respectively. Is detected. Since this is the position described with reference to FIG. 4A above, that is, the “unexposed position”, the process proceeds to the next step S5, and after resetting the E flag in this step S5, Then, the process proceeds to step S7.

In step S7, the output terminal C
By setting both 6 and C8 to "L" level, the photodiodes 68 and 70 are turned off, and the next step S
Proceed to the process of 8.

In step S8, the CPU 51
Sets the output terminals C11 and C12 to the "L" and "H" levels, respectively, to set the film feeding motor 23.
The rotation drive of the film 6 in the first feeding direction, which is the first direction, is started, and the process proceeds to step S9. In step S9, 100 msec. Start the timer operation of. The timer sets a waiting time until the rotation speed of the film feeding motor 23 becomes a steady state, and reads the film information of the disc-shaped code plate 3 of the film cartridge 1 in the next step S10. Sequence (For details, see FIG.
reference. In order to secure the reading accuracy in (1), it is provided to set the time required for reading the information. That is, if the bar code information such as the film information of the disk-shaped code plate 3 is read before the number of rotations of the film feeding motor 23 becomes the steady rotation, there is a problem in the information reading accuracy. This is provided because it is necessary to ensure the above information reading accuracy in order to raise the possibility.

Then, in step S10, the bar code is read. Details of this barcode reading sequence will be described below with reference to the flowchart of FIG.

As shown in FIG. 10, when the bar code reading operation of the film information and the like of the disk-shaped code plate 3 is performed, first, in step S51, the CPU
By setting the output signal of the output terminal C2 of the 51 to the "H" level signal, the light emitting diode 64 in the photo reflector 21 is turned on, and the disc-shaped code plate 3 is turned on.
The barcode such as the information peculiar to the film is set to the readable state, and the process proceeds to step S52.

Next, in steps S52 to S55, a bar code reading operation for film information and the like on the disk-shaped code plate 3 is performed. That is, first, in FIG.
As shown in (a), the bar code of the disk-shaped code plate 3 is provided with a start bit 4, and the pattern of this start bit 4 is the same as that of other bar codes on the disk-shaped code plate 3. It is wider than the bit pattern and is painted black. The step of reading the start bit 4 separately from other bits is step S5.
2 to S55.

In step S52, the timer T
Reset M1 and start. Next, in step S53, when the input terminal C3 of the CPU 51 is monitored and the input signal of the input terminal C3 is switched from the "H" level signal to the "L" level signal, the processing of the next step S54. Proceed to. In this step S54, the timer TM1 is stopped, and in the processing of the next step S55, the comparison of the count value of the timer TM1 and the predetermined value TST is performed.

Here, when the relation between the count value of the timer TM1 and the predetermined value TST is TM1 ≧ TST, it is determined that the detected bar code information is the start bit 4, and the next Then, the process proceeds to step S56.

On the other hand, when the relation between the count value of the timer TM1 and the predetermined value TST is TM1 <TST (when TM1 ≧ TST is not satisfied), the detected bar code information is not the start bit 4 but the start bit 4. Then, it is determined that it is a normal information bit, and the process returns to the above-mentioned step S52.

As described above, when TM1 ≧ TST in step S55, if the process proceeds to the next step S56, this step S56 and thereafter, step S63.
Up to and in the sequence in step S65, a sequence for actually reading the bar code information indicating the information peculiar to the film of the disc-shaped code plate 3 and the like is performed.

In other words, the bar code pattern on the disc-shaped code plate 3 provided in the film cartridge 1 applied to the camera of this embodiment has "white", "black", and "white" following the start bit 4. "..., so that twelve bit patterns are alternately formed,
These bit patterns are set to two types, a wide pattern and a narrow pattern, in addition to the "white" and "black" patterns. The length of the pulse width is determined by reading these bit patterns in steps S56 to S63 and S65.

First, in step S56, the loop counter I is set to "0". Next, step S57.
At, the timer TM2 is reset and started. Then, in the next step S58, the CPU
When the state of the input terminal C3 of 51 is monitored and the state of the input terminal C3 changes, the next step S
At 59, the timer TM2 stops counting.

Next, in step S60, the magnitude relation between the count value of the timer TM2 and the predetermined time value TTH is compared, and the relation between the count value of the timer TM2 and the predetermined time value TTH is TM2 ≧. In the case of TTH, since it is determined that the pulse width is long, the process proceeds to the next step S61, and in this step S61, "1" is stored in the Y (I) flag and the process proceeds to the next step S63.

On the other hand, in step S60, when the relationship between the count value of the timer TM2 and the predetermined time value TTH is TM2 <TTH (when TM2 ≧ TTH is not satisfied), it is determined that the pulse width is short. Then, the process proceeds to the next step S62. In this step S62, "0" is stored in the Y (I) flag, and the process proceeds to the next step S63.

Then, in step S63, I = 1
If not 1 (if I ≠ 11), the next step S6
In step 5, "1" is added to I (I + 1), and the process returns to step S57. Then, the above step S5
By executing the series of steps 7 to S63 and S65, 12 pieces of bit pattern information following the start bit 4 are read out, and the Y (I) flag, that is, Y (0) to Y (11). Information unique to the film is stored in the flag.

On the other hand, in step S63 described above, I
If it is determined that = 11, the next step S6
4 is performed, and in step S64, the above C
The light emitting diode 64 is turned off (OF) by setting the output signal of the output terminal C2 of the PU 51 to the “L” level signal.
In the F) state, a series of bar code reading operations is completed (RETURN; return), and the process proceeds to step S11 in FIG. 9 described above.

Next, as shown in FIG. 9, step S11
In the above, by setting the output signal of the output terminal C4 of the CPU 51 to the “H” level signal, the light emitting diode 66 in the photo interrupter 30 is turned on, and the film 6 by the photo interrupter 30 is turned on.
The preparation state for detecting the perforation 10 provided above is set, and the process proceeds to the next step S12. In step S12, the state of the input signal of the input terminal C5 of the CPU 51 is monitored. Here, when the input signal of the input terminal C5 changes from the "H" level signal to the "L" level signal, it means that the perforation 10 has been detected, and therefore, in the process of the next step S13, a short circuit occurs. The brake is applied.

That is, in this step S13,
The CPU 51 sets both the output signals of the output terminals C11 and C12 to the "L" level signal to set the film feeding motor 23 to the short brake state.
0 msec. The film feeding motor 23 is turned off (OFF) after being held only for the next step S
In step S14, the output signal from the output terminal C4 of the CPU 51 is set to the "L" level signal to turn off the light emitting diode 66 in the photo interrupter 30 in step S14.

Then, in the next step S15, E
If it is determined that the flag state is the E flag = 1, that is, the set state, the next step S
16. In step S16, the CPU
51 sends a control signal to the display means 74, displays a warning such as "PARTIAL" on the display means 74, and proceeds to the processing of the next step S17. The warning display on the display means 74 indicates that the film cartridge 1 containing the partially exposed film 6 in the camera body is loaded.

In the next step S17, the CPU
51 communicates with the memory 73 and executes step S1 described above.
Y (0) to Y (1) which are barcode data such as film information of the disk-shaped code plate 3 read at 0.
The data stored in 1) is stored in the memory 73. Then, in the next step S18, the CPU 51 stores the contents of the E flag in the memory 73, and ends the series of sequence operations of the automatic film feeding (autoload) (RETURN; return).

In the above embodiment, the film 6 after the film cartridge 1 is loaded into the camera body is loaded.
After completion of the initial sending of, the sequence is configured so that the bar code data in which the film information and the like of the disc-shaped code plate 3 in the film cartridge 1 is recorded in the memory 73 of the CPU 51. However, immediately after reading the bar code data of the disc-shaped code plate 3, that is, immediately after the process of step S10 described above, the bar-code data of the disc-shaped code plate 3 is
The same applies to a sequence stored in the memory 73 of the CPU 51.

FIG. 11 is a sequence of a power-on reset in the camera of the above-described embodiment, that is, an operation in the case where a new battery is loaded into the camera body by replacing the power source battery which is the main power source of the camera. It is a flow chart which shows a sequence.

As shown in FIG. 11, first, step S1
At 01, the input signal of the input terminal C10 of the CPU 51 is monitored. Here, if the input signal of the input terminal C10 is the "L" level signal, it means that the film cartridge 1 is not loaded in the camera body. The feeding (autoload) operation is performed, and the sequence ends (RETURN; return).

On the other hand, in step S101, when the input signal of the input terminal C10 of the CPU 51 is the "H" level signal, the film cartridge 1
Is loaded in the camera body, the process proceeds to step S102, in which the CPU 51 and the memory 73 communicate with each other, and the film information stored in the memory 73 is stored. Data such as is transferred (loaded) into the CPU 51.

Then, in step S103, when the bar code data Y (0) to Y (11) are present in the data such as the film information transferred to the CPU 51 in the process of step S102, Is determined to be after the completion of the automatic film feeding (autoload) operation, and the process proceeds to the next step S104.

On the other hand, in step S103, if the bar code data Y (0) to Y (11) in the data such as the film information transferred to the CPU 51 are all "0", the film When it is determined that automatic feeding (autoloading) is not performed, step S
After proceeding to the processing of 106 and performing automatic film feeding (auto loading) in this step S106, this sequence is ended (RETURN; return).

Although not described in this embodiment, the bar code data Y (0) to Y (11) after the photographed film is rewound into the film cartridge. Are reset, the bar code data at this time are all "0". Therefore, in the above-described process of step S103, the case where all the bar code data Y (0) to Y (11) are “0” can be the following two cases. That is, (1) When the film cartridge in which all the films are rewound and stored is loaded in the camera body. (2) After the power supply battery has been removed from the camera body for battery replacement, etc., a new cartridge is loaded into the camera body after the film cartridge containing the unused film is loaded into the camera body. If done.

In any of the cases (1) and (2), the process proceeds to the above-described step S106, and the film automatic feeding (autoloading) is performed.

Further, in the step S103, the bar code data Y (0) to Y (1
If 1) exists, the E flag, which is the data transferred from the memory 73 into the CPU 51, is checked in the next step S105, and E flag =
If it is 1, the CPU 51 communicates with the display means 74, and a warning display "PART" is displayed on the display means 74.
If "E flag = 0" while displaying "IAL" or the like, a series of sequence is ended (RETU
RN; return).

As described above, according to the above-described embodiment, the film information of the disc-shaped code plate 3 provided on the film cartridge 1 is stored in the control circuit of the camera body in a nonvolatile manner such as an EEPROM. Since it is configured to be stored in the memory 73 which is a storage unit, for example, when the battery is replaced or the like due to the consumption of the power battery 50, the power battery 50 is replaced.
Data such as film information read from the disc-shaped code plate 3 stored in the memory 73 is lost due to a voltage drop of the power supply terminal when the is removed from the control circuit of the camera. There is no.

Therefore, when a new battery is installed in the camera body by replacing the battery or the like, it is not necessary to read the data such as film information from the disk-shaped code plate 3 again, and the operation sequence of the camera Can be made easier.

[Additional Notes] (1) In a camera that can use a film cartridge having an information recording disc rotatable with a spool around which a film is wound on the outer surface side thereof, a loading detection for detecting loading of the film cartridge into the camera. Means, drive means for rotating the spool in the cartridge in response to the output signal of the loading detection means, data reading means for reading data from the information recording disk rotated by the drive means, and the main part of the camera. A non-volatile storage means for storing the data read by the data reading means even when the power supply is removed.

(2) Loading detection means for detecting loading of a film cartridge in a camera having a built-in exposure state indicator for instructing the exposure state of a film, the film cartridge being usable.
A state detecting means for detecting the state of the exposure state indicator,
A non-volatile storage means for storing the data read by the state detection means even when the main power source of the camera is removed.

[0097]

As described above, according to the present invention, information about a film read from a disc-shaped code plate, which is an information storage disc provided in a film cartridge, is stored in a control circuit in the camera body. Since it is stored in the non-volatile storage means such as the EEPROM, even when the battery, which is the main power source of the camera, is replaced, the voltage drop of the power supply terminal caused by this causes the film information and the like to be recorded. It is possible to provide a camera in which data is not lost.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a camera according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a main part of the camera shown in FIG.

FIG. 3 is a diagram of a main part of the camera of FIG. 2 as viewed from above.

4A and 4B are diagrams showing respective states of an exposure state indicating plate provided on the bottom surface side of the film cartridge applied to the camera of FIG. 1, wherein FIG. 4A is an “unexposed position” and FIG. The figure which shows each state of "partial exposure position" and (c) "all exposure positions", respectively.

5 is a perspective view showing the external appearance of the film cartridge shown in FIG.

FIG. 6 is a central longitudinal sectional view of the film cartridge shown in FIG.

FIG. 7 is a view showing a state in which the film in the film cartridge of FIG. 5 is pulled out of the film cartridge.

8 is an electric circuit diagram showing a control circuit in the camera of FIG.

9 is a flowchart showing an operation from film loading to automatic film feeding in the camera of FIG.

10 is a flowchart showing a film information reading sequence of a disc-shaped code plate provided in the film cartridge of the camera shown in FIG.

11 is a flowchart showing a sequence when a battery is replaced in the camera shown in FIG.

[Explanation of symbols]

1, 102 ... film cartridge 2, 103 ... film cartridge spool shaft 3, 104 ... information recording disk, disk-shaped code plate 6 ... film 7 ... exposure status indicator (status indicator, exposure status indicator) 21 ... Photo reflector (reading means, data reading means) 22 ... Take-up spool 23, 101 ... Film feeding motor (motor driving means, driving means) 30 ... Photo interrupter (perforation detection means) 31, 32 ... Photo interrupter (state detection means) 100 ... Film loading detection means 105 ... Data detection means 106 ... Data storage control means 107 ... (Nonvolatile) storage means

Claims (3)

[Claims] 1. A camera which can use a film cartridge which has a disc-shaped code plate which is rotatable integrally with a cartridge spool shaft and which shows information peculiar to the film, and which is constructed so that the leading end of the film is sent out from the cartridge. A drive means for sending out the leading end of the film contained in the cartridge, a reading means for reading the film information from the disc-shaped code plate of the loaded film cartridge, and a memory for storing the read film information. When the film cartridge is loaded into a camera, the film tip is sent out from the cartridge, the film information is read, and the data is written in the nonvolatile storage means. A camera to do. 2. A film cartridge, which is provided at one end of a cartridge, has a status indicator for changing the display content corresponding to the exposure status of the film contained therein, and is configured to feed the leading end of the film from the cartridge. In a usable camera, driving means for sending out the leading end of the film stored in the cartridge, reading means for reading the exposure state information from the status indicator of the loaded film cartridge, and the read film information A non-volatile storage means for storing, and when the film cartridge is loaded into the camera, the film front end is sent out from the cartridge, the exposure state information is read, and the data is written in the non-volatile storage means. Characteristic camera. 3. A camera which can use a film cartridge which has an information display member for displaying a plurality of information about the film in a part of the cartridge, and is configured to feed the leading end of the film out of the cartridge. The film cartridge is equipped with a film feeding means for feeding the film, an information reading means for reading the plurality of pieces of information, and a non-volatile storage means for storing the read film information. At this time, the camera is characterized in that the film front end is sent out from the cartridge and the read film information is stored in the non-volatile storage means.