JPH0822055A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera capable of holding a battery housing chamber cover in a locked state so as not to take out a battery and disturb a discriminating operation, while whether a film is exposed or not is discriminated from a data disk integrally rotated with the spool of a film cartridge. CONSTITUTION:The camera is constituted in such a manner that when whether the film is exposed or not is discriminated, an actuator 30 is actuated to move a first moving member for locking 34 from a locking releasing position L1 to a locking position L2, so that the battery housing chamber cover 26 is held in the locked state with respect to a camera main body part, 32. Therefore, even if a second moving member for locking 36 is moved from the locking position L2 to the locking releasing position L1 by a manual operation at the time of discriminating whether the film is exposed or not, the battery housing chamber cover 26 can not be opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for reading film data from a film cartridge having film data such as exposed / unexposed information indicating whether the film is exposed or unexposed. The present invention relates to a lock mechanism for a battery compartment cover.

[0002]

2. Description of the Related Art Conventionally, a data disk on which information such as film type, number of sheets, and sensitivity is recorded as a bar code is provided rotatably integrally with a spool along one end surface of a cartridge case. A reading means for reading a bar code signal of a data disc, which is a camera using a film cartridge that indicates the exposed / unexposed information of the film such as unexposed, taken out halfway, exposed or developed depending on the stop position of There is proposed a camera which is equipped with the reading means and reads the bar code signal from a data disk which rotates at the time of feeding the film to judge whether the film is exposed or not.

However, in this type of camera, if the user inadvertently removes the battery from the camera when the film is exposed / unexposed, the data disc corresponds to the film exposed / unexposed. If this happens, the battery will be reloaded and the film exposed / exposed.
When the unexposed discriminating operation is started, the bar code signal of the data disc deviated from the predetermined stop position is read by the reading means, so that there is a possibility that the exposed / unexposed film cannot be accurately discriminated. is there.

On the other hand, there has been proposed a camera configured to forcibly stop the data disk at the exposed position when the battery of the camera is taken out while the film is exposed / unexposed.

However, in this type of camera, even if the film in the loaded film cartridge is unexposed, if the battery of the camera is taken out during the film exposure / non-exposure determination, the data disc is not recorded. Therefore, when the film cartridge is reloaded into the camera, the cartridge is judged to have been exposed and cannot be used.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a camera having a battery removal preventing function at the time of determining whether the film of a film cartridge is exposed or not exposed.

[0007]

In order to solve the above technical problems, the present invention provides a camera having the following configuration.

That is, this camera uses a film cartridge which rotates integrally with the film winding shaft with respect to the cartridge case and has a data disk on the outer surface of which the film data is displayed by a bar code. The bar code of the film cartridge is read to detect whether the film is exposed or not. This camera has a battery storage chamber lid, a lock state holding means for holding the battery storage chamber lid in a locked state with respect to the camera body, and the locked state during the exposure / non-exposure detection operation of the film. Lock driving means for holding the battery storage chamber lid in a locked state with respect to the camera body by operating the holding means.

According to the above construction, even if the manual lock means is operated to unlock the battery chamber lid with respect to the camera body during the film exposure / non-exposure detection operation,
Since the battery storage chamber lid is held in the locked state with respect to the camera body by the locked state holding means, the battery is reliably prevented from being taken out.

[0010]

EXAMPLE A camera according to an example of the present invention will be described in detail below with reference to FIGS.

First, the film cartridge 2 used in this camera will be described with reference to FIGS. The film cartridge 2 is a type of cartridge in which the film 8 is always stored in the cartridge case 4 up to the leading end when the film 8 is not loaded in the camera. It has an auto loading mechanism that feeds it out through the entrance / exit 3 and automatically winds it around a film winding spool provided on the camera side. As shown in FIG. 3, the film cartridge 2 has a spool 12 having a non-circular driving hole 10 that engages with a film rewinding fork 22 provided in a cartridge chamber of a camera, and is provided on one end side of a cartridge case 4 substantially. It has a data disk 6 which is fixed along and is rotatable with respect to the cartridge case 4. In addition,
In FIG. 1, an arrow D1 indicates a data disk 6 corresponding to a direction in which the film 8 is fed out from the cartridge case 4.
The rotation direction of the cartridge case 4 is indicated by an arrow D2.
The rotation directions of the data disk 6 corresponding to the rewinding direction of the film 8 inward are shown respectively.

The rewinding fork 22 of this camera
Is the film cartridge 2 when the cartridge 2 is loaded.
After being pushed down by the spool 12, the spool 12 is rotated and then fitted into the drive hole 10 when the direction of the drive hole 10 of the spool 12 coincides with that of the drive hole 10.

The film 8 contained in the cartridge case 4 has a plurality of frames F as shown in FIG. That is, at one side edge of the film 8 in the longitudinal direction, a first perforation 8a is formed at the front end side thereof and a second perforation 8b is formed at the rear end side thereof corresponding to each frame F. The frame F feed can be performed using the first and second perforations 8a and 8b. Further, a magnetic recording area 8c is provided on the other side edge portion in the longitudinal direction of the film 8 in correspondence with each frame F as indicated by a two-dot chain line in FIG.・ Seconds), shutter speed, aperture value, subject brightness, print size, etc. can be recorded. The photographing preparation reference position of each frame F of the film 8 fed from the cartridge case 4 with respect to the camera body is indicated by a reference symbol P in FIG. 2 by taking the Nth frame F as an example.

As shown in FIG. 4, the data disk 6 of the film cartridge 2 has a bar code 14 composed of hatched black portions BQZ, WB, NB and white portions WS, NS. . In the present specification, the widest black portion BQZ is referred to as a black quiet zone, a portion other than the black quiet zone is referred to as an identification zone (a region indicated by α and β in the figure), and the identification zone has A narrow black bar is called a narrow bar NB, a wide black bar is called a wide bar WB, a narrow white bar is called a narrow space NS, and a wide white bar is called a wide space WS. In this embodiment, the black quiet zone BQZ is 196 ° with respect to the center of the data disk 6, and
The identification zones are respectively configured at 164 °, and the identification zones are three wide bars WB configured at 20 °,
It is composed of two wide spaces WS formed at 20 °, three narrow bars NB formed at 8 °, and five narrow bars NB formed at 8 °. As shown in FIG. 4, when the black quiet zone BQZ is located below the spool 12 of the data disk 6, one of the pair of edges of the black quiet zone BQZ that forms a boundary with the narrow space NS. The edge located on the right side of the spool 12 is referred to as a reference edge E of the data disk 6. In addition, ten bars (bars in the area indicated by α in the figure) located counterclockwise from the reference edge E, that is, NS, WS, NS, NB,
WS, NB, WS, WB, NS, and NB are collectively referred to as a 10-bit code, and three bars other than the 10-bit code in the identification zone (bars in the area indicated by β in the figure), that is, NS, WB and NS are collectively referred to as a 3-bit code. With this 10-bit code configuration, the film sensitivity and film type (negative, positive, monochrome, color, etc.) are indicated.
On the other hand, the 3-bit code structure indicates the number of films.

By the way, the film cartridge 2 is unexposed (UNPOSED), partially exposed, that is, taken out halfway (PARTIAL), developed (PROCESSED), or fully exposed (EXPOSED). Whether or not is indicated by the relative stop position of the data disk 6 with respect to the cartridge case 4. That is, when the film 8 is unexposed to the extension line L connecting the positioning reference point D near the film entrance / exit 3 of the cartridge case 4 and the spool 12, data as shown by γ1 in FIG. The reference edge E of the disc 6 is 175.5 °
In the case where the film 8 is positioned at the positions separated in the counterclockwise direction and the film 8 is partially exposed, as shown in FIG.
8, the reference edge E of the data disk 6 is positioned at a position separated by 315.5 ° counterclockwise as indicated by γ2, and when the film 8 has been developed, γ3 in FIG. 9, the reference edge E of the data disk 6 is positioned at a position separated by 81.0 ° counterclockwise, and when the film 8 is fully exposed, γ4 in FIG. As shown by, the reference edges E of the data disk 6 are positioned at positions separated by 18.0 ° counterclockwise.

The film cartridge 2 is provided on the bottom side of the film cartridge 2 as shown in FIG. 5 so that the user can judge from the appearance whether the film 8 of the cartridge is unexposed or exposed. It has an exposed / unexposed display mechanism for the film 8. That is, the exposed / unexposed display mechanism corresponds to the colored display member 12 rotatably provided integrally with the spool 12 in the cartridge case 4 and the unexposed and fully exposed positions of the data disk 6. The display windows 12a and 12b formed on the cartridge case 4 are used by the user to position the colored display member 12 positioned according to the exposed / unexposed state of the film.
By visually observing through the film 12b, the usage state of the film 8 can be judged at a glance. As will be described later, the camera according to the present embodiment uses the film 8
Is not exposed, or is in a state other than unexposed, that is, whether it is partially exposed, fully exposed, or developed. 2
When the film cartridge 2 having the film 8 other than the unexposed film is loaded in the main camera, the data disk 6 of the film cartridge 2 is exposed to the full exposure. It is designed so that it can be stopped at the position corresponding to the end.

Now, the structure of the present camera using the film cartridge 2 will be described below with reference to FIGS. This camera has the film cartridge 2
As a sensor for reading the bar code 14 of the data disk 6 of FIG.
Is fixed at a predetermined position on the camera body side. The photo reflectors PR1 and PR2 and the cartridge case 4 when the film cartridge 2 is loaded in the camera.
FIG. 6 shows the positional relationship between and in detail. That is, as shown in the drawing, when the film cartridge 2 is loaded, the one photoreflector PR1 is 49.25 ° clockwise with respect to the reference point D of the cartridge case 4.
(The angle indicated by δ1 in the figure) is provided in the camera corresponding to the separated positions, while the other photoreflector PR2 is 139. counterclockwise with respect to the reference point D of the cartridge case 4. 5 ° (angle indicated by δ2 in the figure)
It is provided on the camera corresponding to the separated positions. In FIG. 6, an extension line connecting the spool 12 of the data disk 6 of the film cartridge 2 and the photo reflector PR1 is P1, and the spool 12 and the photo reflector PR are shown.
The extension lines that connect the two with P2 are shown respectively, and the spool 12 of the data disk 6 and the cartridge case 4 are also shown.
Of the extension line L connecting the reference point D of the
The angle formed by 1 and δ1 (= 49.25 °)
Further, the angle formed by the extension line L and the extension line P2 is indicated by δ2 (139.5 °), respectively.

As shown in FIGS. 11 to 14, the camera body includes a battery storage chamber for storing a battery for operating the camera, and a film cartridge 2 during a specific operation of the camera after the battery is loaded, that is, as will be described later. Of the film 8 is unexposed or other than unexposed, and a battery storage chamber lid that holds a locked state with respect to the camera body at the time of film exposure / non-exposure determination is provided. That is, in the figure, 24 is a battery storage chamber, 26 is a battery storage chamber lid for opening and closing the battery storage chamber 24, and one end of the battery storage chamber is pivotally attached to the camera body 32 by a battery storage chamber. The chamber lid 38 is the pivot 28 when the battery storage chamber lid 26 is closed with respect to the battery storage chamber 26.
A first guide recess formed in both the battery housing chamber lid 26 and the camera body 32 so that the portion of the battery housing chamber lid 26 located on the opposite side to the camera body 32 communicates with the camera body 32.
Reference numeral 0 denotes a second guide recess provided in parallel with the first guide recess 38 and configured in the same manner as the first guide recess 38, and 34 denotes the inside of the first guide recess 38 when the battery storage chamber lid 26 is closed. As shown in FIGS. 12 and 14, the lock first moving member is provided so as to be movable between the lock release position L1 and the lock position L2, and is biased toward the lock release position L1 by a biasing means (not shown). The lock first moving member 36 is movable in the second guide recess 40 between the unlocked position L1 and the lock position L2 in the same manner as the lock first moving member 34 when the battery storage chamber lid 26 is closed. Lock second moving member provided and operated by manual operation, 3
Reference numeral 0 denotes an actuator as a lock holding means for moving the lock first moving member 34 from the unlock position L1 to the lock position L2 when energized, and the lock first moving member from the lock position L2 to the unlock position when deenergized. L
An actuator adapted to be moved to 1 by the above-mentioned urging means, and 50 is a battery loaded in the battery storage chamber lid 24.

In this structure, when the battery 50 is loaded or replaced, the lock first moving member 34 is positioned at the unlock position L1 as shown in FIGS. By moving from L2 to the unlocked position L1, the battery compartment cover 2
6 can be moved from the closed position shown by the chain line in FIG. 11 to the open position shown by the chain line. After loading the battery, the battery storage chamber lid 2 is moved from the release position to the closed position, and the lock second moving member 36 is manually operated to move from the unlock position L1 to the lock position L2. The lid 26 is locked with respect to the camera body 32. When determining the exposed / unexposed state of the film, the actuator 30 is actuated and the lock first moving member 34 is moved from the unlocked position L1 to the locked position L2 as shown in FIGS. As a result, the battery storage chamber lid 24 is held in the locked state with respect to the camera body 32 by the lock first and second moving members 34 and 36. Therefore, even if the second moving member 36 is manually operated to move the second moving member 36 from the lock position L2 to the unlock position L1 when the film is exposed / unexposed, as shown in FIGS. Since the storage chamber cover 26 is held in the locked state by the first moving member 34, the battery storage chamber cover 26 cannot be opened. When the film exposure / non-exposure determination operation is completed, the power supply to the actuator 30 is stopped,
Since the lock first moving member 34 is moved from the lock position L2 to the lock releasing position L1 by the biasing means, the lock second moving member 36 is manually operated as necessary to move from the lock position L2 to the lock releasing position L1. The battery storage chamber cover 26 can be opened by moving the battery storage chamber cover 26 to.
The operation of the actuator 30 will be described in detail later.

Next, a schematic circuit configuration of this camera will be described with reference to FIG. The following various circuits and devices are connected to the microcomputer shown in the center of this block diagram. That is, in the figure, 102 is the number of photographed (exposed) films 8, the number of remaining (unexposed) films, the type of film, the film sensitivity, a warning, the result of film exposure / non-exposure determination, print size, date, time. And the like, 104 is a photometric circuit for detecting the subject brightness, 106 is an exposure control circuit for controlling the shutter speed and aperture value based on the film sensitivity and the value of the subject brightness, and 108 is the subject An autofocus control circuit for focusing on 110, film 8
A magnetic circuit having a recording head capable of writing magnetic data such as the photographing date / time, the shutter speed, the aperture value, the subject brightness, and the print size in the magnetic recording area 8c.
2 is a drive motor (M) for film feeding, 114, 1
16 is a sensor for reading the data disk of the film cartridge 2 (= photoreflectors PR1, PR2), 1
Reference numeral 18 is a sensor for detecting perforations 8a and 8b of the film 8, SW1 is a shutter button, SW2 is a switch for detecting whether or not the film cartridge 2 is loaded, and SW3 is a switch for detecting opening / closing of the cartridge chamber lid. , SW4 is a midway rewind switch for rewinding the film 8 of the film cartridge 2 in the middle, SW5 and 6 are changeover switches for changing the print size, 120 is a battery chamber lid lock mechanism equipped with the actuator 30, and a battery A Is a battery as a main power source, and battery B is a battery as a power source for a clock circuit for driving a clock built in a microcomputer that keeps date, hour, minute, and second.

The operation of the camera having the above circuit configuration will be described with reference to the attached flowchart. FIG.
Is a flowchart showing the basic flow of the operation of this camera. First, whether or not the film cartridge 2 is loaded in the cartridge chamber is detected by the detection switch SW2 of the film cartridge, and when it is determined in step # 12 that the film cartridge 2 is loaded in the camera, the process proceeds to step # 14. move on. If it is determined in step # 14 that the cartridge chamber lid opening / closing detection switch SW3 has closed the cartridge chamber lid, in step # 16 the actuator 3
0 is operated and the battery storage chamber lid 26 is locked.

Next, in step # 18, a timer interrupt setting, which will be described later, is set, and in step # 20, the film 8 of the loaded film cartridge 2 is unexposed, partially exposed, or fully exposed. After the exposure / non-exposure determination operation (detailed later) of the film whether it is exposed or developed, the energization of the actuator 30 is stopped in step # 22, and the battery storage chamber lid 26 The lock for the camera body is released. That is, during the film exposure / non-exposure discrimination operation, even if the lock second moving member 36 is operated to open the film storage chamber lid 26, this cannot be executed, that is, the battery is removed. This prevents the film drive drive motor 112 from being inadvertently turned off by removing the battery, and the data disk 6
Is prevented from being stopped at a position other than the above-mentioned specific positions (unexposed, partially exposed, fully exposed, or developed) with respect to the cartridge case 4. This is configured such that the camera reads the exposed / unexposed state of the film from the data disk 6 which is stopped at any of the specific positions with respect to the cartridge case 4 as described above. Therefore, if the battery is removed during the film exposure / non-exposure determination operation and the data disk 6 stops at a position other than the specific position, the battery is reloaded into the camera and the film exposure / non-exposure determination operation is performed. Can not read the given bar when the
This is because there is a possibility that the exposure / non-exposure discrimination of the film cannot be accurately performed.

Next, in step # 24, when it is judged that the exposure / non-exposure judgment operation of the film executed in step # 20 is unexposed, that is, it is judged that the film 8 can be used. If
Go to step # 26 described later, while step # 2 above
If the result of 0 is judged to be partially exposed, fully exposed, or developed, that is, if the film is judged to be unusable, then Each step after step # 46 (## 4
8, # 50, # 52) and proceed to the film cartridge 2
The data disk 6 is set to the exposed position shown in FIG. As described above, the camera of the present embodiment is configured so that the film 8 of the film cartridge 2 is
The data disk 6 is configured to be finally set to the exposed position in FIG. 9 except when it is determined that the usage state of No. 1 is unexposed.

If it is determined in step # 24 that the film 8 has not been exposed, the type of the film 8 from the data disk 6 (negative, positive, monochrome, color, etc.) is determined in step # 26. Film 8
After reading the number of frames F and their sensitivities using the sensors PR1 and PR2, the first frame F of the film 8 is set to the shooting preparation position in step # 28.

Next, in step # 30, it is determined whether the film rewind switch SW4 has been operated. If it is determined that the switch SW4 has been operated, the process proceeds to step # 46, while if it is determined that the switch SW4 has not been operated, the process proceeds to step # 32 and the shutter button SW1 is operated. Whether or not it is determined.

When it is determined in step # 32 that the shutter button SW1 has been operated, step # 3
4, the photometry circuit 104, the exposure control circuit 106, and the autofocus control circuit 108 are operated to calculate and determine values such as the shutter speed and aperture, and the shooting operation is executed. Then, in step # 36, the winding operation of the film 8 (the operation of feeding the film 8 from the film cartridge 2 in the film winding spool direction on the camera side) is performed, and while the film winding operation is being executed, In step # 38, the magnetic data such as the shutter speed and the print size are written in the magnetic recording area 8C of the film 8.

Next, in step # 40, it is judged whether or not the frame F of the film 8 being wound is the final frame F. If it is the final frame F, the process proceeds to step # 46. On the other hand, if it is determined that it is not the final frame F, the process proceeds to step # 42, the next frame F is set to the shooting preparation position in this step, and the film winding operation is stopped in step # 44, and then step # 44 is performed. Thirty
The subsequent operation is repeatedly executed. The above-described shooting preparation position setting of the frame F of the film 8 is executed based on the detection of the second perforation 8b of the predetermined frame F by the perforation detection circuit 118.

On the other hand, if it is determined in step # 24 that the film 8 is unusable, or if it is determined in step # 30 that the halfway rewind switch SW4 of the film 8 has been operated, or the above step If it is determined that the frame F of the film 8 wound up in # 40 is the final frame, in any case, step #
46, the film feeding drive motor (M) 112 is moved in the opposite direction in this step, that is, the arrow d in FIG.
The film 8 is rotated in the direction indicated by 2 to rewind the film 8 (the film 8 is rewound into the film cartridge 2).

Next, in step # 48, it is judged whether or not the film 8 is rewound into the cartridge case 4, and if it is judged that the film 8 is rewound, the process proceeds to step # 50 which will be described later, and the film cartridge 2 The data disk 6 is completely exposed as shown in FIG. 9, and accordingly, the film use state display mechanism of the film cartridge 2 is stopped and set at a position indicating EXPOSED as shown in FIG. Then, after that, in step # 52, the process waits until the film cartridge 2 is taken out. When it is determined that the cartridge 2 is taken out, the above step # 1 is performed.
The operations after 2 are repeatedly executed.

FIG. 16 shows a flow chart of the operation (operation for stopping the data disk 6 at the EXPOSED position) executed in step # 50. First, in step # 102, the time Td (second) required for the data disk 6 to rotate once is measured.

Next, in step # 104, the stop timing of the data disk 6 is the photoreflector PR.
It is calculated based on the detection signal from 1. That is, as shown in FIG. 9, the reference edge E of the data disc 6 is 67.25 ° counterclockwise with respect to the photo reflector PR1 at the position where the data disc 6 indicates that all exposure has been completed.
(= Δ1 + γ4 = 49, 25 ° + 18.0 °) separated positions. Since the data disk 6 rotates at a constant speed in the film rewinding direction, that is, the direction indicated by arrow d2 in FIG. 1, after the photo reflector PR1 detects the reference edge E of the data disk 6, td = Td × The data disk 6 should be stopped after 67.25 × 360 ⁻¹ (seconds).

Next, in step # 106, the reference edge E of the data disk 6 is changed to the photo reflector PR1.
After confirming that the reference edge E is detected by, the process waits for td time to elapse immediately after the reference edge E passes through the photo reflector PR1 in step # 108. Then, in step # 110, the data disk 6 is braked and stopped.

On the other hand, the film exposure / non-exposure determination operation executed in step # 20 of the basic flow chart shown in FIG. 15 is executed as follows. This discriminating operation will be described with reference to FIGS.

FIG. 23 shows the reading position of the bar code 14 on the data disk 6 of the film cartridge 2 which can be simultaneously read by the pair of photo reflectors PR1 and PR2 provided on the camera side. As shown, the pair of photo reflectors PR1, PR1 for the spool 12 of the data disc are shown.
The pair of barcodes are shown in parallel with each other by a shift angle of PR2. In the figure, a pair of photo reflectors PR1 and PR2 are the above-mentioned UNEXPOSED
(Unexposed), PARTIAL (partially exposed), EXP
OSED (completely exposed) and PROCESSED (developed), respectively, are shown on the straight lines orthogonal to the pair of bar codes, and reference numerals e1 to e13 indicate the bar WB or NB and the space WS or NS. Boundary lines, that is, identification edges that form the boundaries between and are shown sequentially in the counterclockwise direction with respect to the reference edge E of the data disk 6.
Then, d1 and d2 are photoreflector PR, respectively.
The rotation direction of the data disk 6 is shown with respect to the respective straight lines indicating the positions of 1 and PR2. As shown in the figure, when the film 8 is not exposed (corresponding to FIG. 6), the reading positions of the photoreflectors PR1 and PR2 are set to the narrow space NS between the tenth and eleventh identification edges e10 and e11 of the data disk 6. And the Black Quiet Zone BQ
Z, and the film 8 is partially exposed (FIG. 7).
(Corresponding to FIG. 8), the reading positions of the photo reflectors PR1 and PR2 are in the black quiet zone BQZ, respectively, and when the film 8 has been developed (corresponding to FIG. 8), the reading positions of the photo reflectors PR1 and PR2 are respectively. Wide space WS between the black quiet zone BQZ and the sixth and seventh identification edges e6, e7, and the film 8 is fully exposed (corresponding to FIG. 9).
The reading positions of the photo reflectors PR1 and PR2 are the black quiet zone BQZ and the reading positions of the ninth and the first, respectively.
This is a narrow bar NB between the 0 identification edges e9 and e10.

Now, the bar code 14 of the data disk 6
On the other hand, the pair of photo reflectors PR1 and PR2 provided on the camera side are arranged as described above. First, in step # 202, the photo reflector PR
1, a variable N1, which represents a change in the signal output from PR2
N2 is set to zero, respectively, and the drive motor 112 is actuated to move the film 8 in the film rewinding direction d.
Sent to 2.

Next, at step # 204, it is judged whether or not there is a signal change of the photo reflector PR1,
If there is a signal change, the process proceeds to step # 206 and 1 is added to the value of the variable N1, and if there is no signal change, step # 206 is skipped and the process proceeds to step # 208. In step # 208, it is determined whether or not there is a signal change of the photo reflector PR2, and if there is a signal change, the process proceeds to step # 210 and 1 is added to the value of the variable N2.

Then, the process proceeds to step # 212, and if it is determined that the value of N1 is 1, the film 8 is regarded as unexposed and the process proceeds to step # 218 while the step # 218 is performed. At 212, if N1 ≠ 1
If it is determined that the value of N2 is 1, the process proceeds to step # 214, and it is determined whether or not the value of N2 is 1 in this step. If it is determined that N2 ≠ 1,
While it is determined that N2 = 1 while the operations after step # 204 are repeatedly executed, the film 8 is in a state other than unexposed state, that is, a partially exposed state,
Alternatively, after assuming that the state is either the full-exposure state or the developed state, the process proceeds to step # 216, and then RETUR
N (return).

That is, as is apparent from FIG. 23, when the photoreflectors PR1 and PR2 correspond to the position of UNEXPOSED, when the data disk 6 rotates in the rewinding direction d2, the photoreflector PR2 moves to the 13th position.
Before detecting the discrimination edge e13, the photo reflector PR
1 detects the tenth identification edge e10, and as a result, the value of the variable N1 increases before the value of the variable N2 in steps # 212 and 214, so that the film 8 is unexposed. Is to be determined. On the other hand, the photo reflectors PR1 and PR2 are PART.
If the position corresponds to any of IAL, EXPOSED, and PROCESSED, the data disk 6
Is rotated in the rewinding direction d2, the photo reflector P
Before R1 detects the thirteenth discrimination edge e13, the photoreflector PR2 detects the thirteenth discrimination edge e13 or the ninth discrimination edge e9 or the sixth discrimination edge e6, which results in the variables in steps # 212 and 214. By increasing the value of N2 before the value of the variable N1, it is determined that the film 8 is in a state other than the unexposed state.

In the above embodiment, the reading operation of the bar code 14 is executed while rotating the data disk 6 in the rewinding direction d2 of the film 8, but the reading operation is as shown in the flow chart of FIG. ,
It is also possible to execute it while rotating the data disk 6 in the feeding direction d1 of the film 8.

That is, first, in step # 402, the values of the variables N1 and N2 representing the changes in the signals output from the photoreflectors PR1 and PR2 are set to zero, and the data disk 6 is moved in the feeding direction of the film 8. Rotate to d1.

Next, in step # 404, it is determined whether or not the signal from the photoreflector PR1 has changed. If the signal has changed, the process proceeds to step # 406 and 1 is added to the value of the variable N1, If there is no signal change, step # 406 is skipped and step # 408 is executed.
Proceed to. In this step, it is determined whether or not there is a signal change of the photo reflector PR2, and if there is a signal change, the process proceeds to step # 410 and 1 is added to the value of the variable N2, and if there is no signal change, the step # 410. Step 410 is skipped and the process proceeds to step # 412.

Next, in steps # 412 and # 414, it is judged whether or not the values of N1 and N2 are equal to 12. If they are not equal to 12, either of the values of N1 and N2 is equal to 12. Until then, the loop from step # 404 onward is repeatedly executed.

As a result of repeatedly executing the operations after step # 404, if N2 = at step # 412.
If it is judged to be 12, the film 8 is judged to be in an unexposed state and the process proceeds to step # 418, while if it is judged to be N1 = 12 in step # 414, It is considered that the film 8 is in a state other than the above-described unexposed state, the process proceeds to step # 416, and then RET is performed.
It becomes UREN (return). That is, as is clear from FIG. 23, the photo reflectors PR1 and PR2 are UNE
When the data disk 6 rotates in the feeding direction d1 when the position corresponds to the position of XPOSED, before the photo reflector PR1 detects the eighth identification edge e8 corresponding to the twelfth edge counted from the eleventh identification edge e11. The photo reflector PR2 will detect 12 edges (when the photo reflector PR1 detects the eighth identification edge e8 corresponding to the twelfth edge counting from the eleventh identification edge e11, the photo reflector PR2 will be the reference edge). (A total of 14 identification edges are counted from E to the 13th identification edge e13.) As a result, the variable N2 is obtained in steps # 412 and # 414.
When the value of reaches to 12 before the value of the variable N1, it is determined that the film 8 is unexposed. On the other hand, the photo reflectors PR1 and PR2 are P
ARTIAL or EXPOSED or PROCESS
When the data disk 6 is rotated in the feeding direction d1 when it corresponds to any position of D, the photoreflector PR2 has 12 identification edges (in the case of PARTIAL: the corresponding 12th identification edge is the reference edge E). Eleventh identification edge e11 / EX corresponding to the twelfth counting from
In the case of POSED: the corresponding 12th identification edge is the 7th corresponding to the 12th counting from the 10th identification edge e10.
In the case of identification edge e7 / PROCESS: the corresponding 12th identification edge is 12th counting edge from the reference edge E before detecting the 12th identification edge e4) which is the 12th counting edge counting from the 7th identification edge e7.
The eleventh identification edge e11 corresponding to the th identification edge is detected, and as a result, steps # 412, #
When the value of the variable N1 reaches 12 before the value of the variable N2 in 414, it is determined that the film 8 is in a state other than the unexposed state.

In each of the above-mentioned embodiments, the exposed / unexposed state of the film 8 is discriminated depending on which of the two photoreflectors PR1 and PR2 has detected the predetermined number of discrimination edges first. The photo reflectors PR1 and PR2
Compares the specified number of identification edges detected by one reference photoreflector with the number of identification edges detected by the other photoreflector. It can also be executed by

That is, as shown in FIG. 19, first, at step # 302, the photo reflectors PR1 and P1 are set.
Variables N1 and N representing changes in signals output from R2
The value of 2 is set to zero and the data disk 6 is rotated in the feeding direction d1 of the film 8.

Next, in step # 304, it is determined whether or not the photo reflector PR1 has detected an identification edge. If it has detected an identification edge, step # 3.
While proceeding to 06, 1 is added to the value of N1, but when the discriminating edge is not detected, step # 306 is skipped and the routine proceeds to the next step # 308. Then, in step # 308, it is determined whether or not the photoreflector PR2 has detected the identification edge. If the identification edge is detected, the process proceeds to step # 310, while if the identification edge is not detected, the above steps are performed. The operation after # 304 is repeatedly executed.

If it is determined in step # 308 that the photoreflector PR2 has detected the identification edge, the process proceeds to steps # 310 and # 312 to determine whether the value of N1 is 1≤N1≤6. Is judged. Then, if the value of N1 satisfies the condition of 1 ≦ N1 ≦ 6, it is determined that the film 8 is in the unexposed state and the process proceeds to step # 314, while the value of N1 is 1 ≦ N.
If 1 ≦ 6 is not satisfied, the film 8 is considered to be in a state other than the unexposed state, the process proceeds to step # 316, and then RETUREN (return) is set. That is, FIG.
As is clear from 3, the photo reflectors PR1, PR
2 corresponds to the position of UNEXPOSED, the data disk 6 rotates in the film feeding direction d1, and when PR1 detects the first reference edge E, P
R2 has detected the eleventh and twelfth identification edges e11 and e12. As a result, when the variable N2 = 1 in step # 310, N1 = in step # 312.
2, the condition 1 ≦ N1 ≦ 6 in the step is satisfied, and it is determined that the film 8 is not exposed. On the other hand, the photo reflector P
When R1 and PR2 are positioned corresponding to PARTIAL and the data disk 6 rotates in the film feeding direction, when PR2 detects the first reference edge E, PR1 is the reference edge E and the first to twelfth identification edges e1. ~
It means that a total of 13 edges of e12 are detected,
As a result, when the variable N2 = 1 in step # 310, the value of N1 becomes 13 in step # 312, and the condition in that step is not satisfied, and the film 8 is in a state other than unexposed state. Is to be determined. On the other hand, photo reflectors PR1, PR
When 2 is positioned corresponding to EXPOSED or PROCESSED, when the data disk 6 rotates in the film feeding direction, when PR2 detects the first reference edge E, PR1 has not yet detected the first reference edge E. As a result, when the variable N2 = 1 in step # 310, N in step # 312.
The value of 1 becomes zero, which means that the condition in the step is not satisfied, and it is determined that the film 8 is in a state other than the unexposed state.

On the other hand, the timer interrupt setting operation executed in step # 18 of the basic flow chart shown in FIG. 15 is executed as follows. This timer interrupt setting operation will be described with reference to FIG.

With this timer interrupt setting, when one photoreflector of the pair of photoreflectors PR1 and PR2 fails, the output signal of the other photoreflector is used to force the data disk 6 to EXP.
The purpose is to stop at the OSED position. This timer interrupt setting operation is executed 3 seconds after the film feeding drive motor 112 starts to rotate after the lock operation of the battery storage chamber lid 26 shown in step # 16 of FIG. 15 is completed. . That is, as described above, the rewinding fork 22 of the camera of this embodiment is used.
Is the film cartridge 2 when the cartridge 2 is loaded.
The spool 12 is once pushed down and then rotated to be fitted into the drive hole 10 of the spool 12 when the direction thereof coincides with that of the drive hole 10. Further, the camera is adapted for rewinding. Since the fork 22 is configured to make one rotation in at least 1.5 seconds, the rewinding fork 22 is engaged with the spool 12 of the film cartridge 2 within the above 3 seconds and the data disk 6
Must have at least one revolution. Therefore, by knowing the changes in the outputs from the photo reflectors PR1 and PR2 that are output as the data disk 6 rotates, the photo reflectors PR1 and PR
It is possible to determine whether 2 is operating normally.

First, in step # 502, it is judged whether or not the value of the variable N1 indicating the output change from the photoreflector PR1 is equal to or more than 1, and if N1 ≧ 1, the process proceeds to step # 504. In step # 504, it is determined whether the value of the variable N2 indicating the change in output from the photo reflector PR2 is equal to 1 or more. If N2 ≧ 1, then RETURN,
If N2 ≧ 1 is not satisfied, the process proceeds to step # 506, and in this step, one display mark such as a question mark is used to indicate that the operation of the photo reflector PR2 is abnormal.

Next, in steps # 508 and # 510, after the rewinding operation of the film 8 is executed, the process proceeds to step # 512, which will be described later, in which PR1 is used to move the data disk 6 to the position corresponding to EXPOSED. To stop.

On the other hand, in step # 502 above, N
If not 1 ≧ 1, the process proceeds to step # 520 and N2 ≧
It is determined whether it is 1. If N2 ≧ 1, the process proceeds to step # 522 and the above step # 506.
After it is shown that the operation of the photo-reflector PR1 is abnormal by using a display mark similar to that displayed in step 1, the process proceeds to steps # 524 and # 526.
The rewinding operation of is executed. And step # 52
In 8, the data disk 6 is E using PR2.
Stop at the position corresponding to XPOSED.

On the other hand, in step # 520 above, N
If not 2 ≧ 1, the process proceeds to step # 530, and two display marks such as a question mark are used to indicate that the operations of the photo reflectors PR1 and PR2 are both abnormal. After that, the process proceeds to steps # 532 and # 534 to perform the rewinding operation of the film 8, and then the step # 53.
At 6, the data disk 6 is stopped.

Now, the stopping operation of the data disk 6 which is executed in each of the above steps # 512 and # 528 is executed as follows. This stopping operation will be described with reference to FIGS.

First, the operation of stopping the data disk 6 performed in step # 512 is the same as step # 602 in FIG.
.About.610, the operation is performed in exactly the same manner as the operation for stopping the data disk 6 at the EXPOSED position described with reference to FIG.

On the other hand, in the stop operation of the data disk 6 executed in step # 528, as shown in FIG. 22, first, in step # 702, the time Td (second) required for the data disk 6 to rotate once is To be measured.

Next, in step # 704, the stop timing of the data disk 6 is the photo reflector PR.
It is calculated based on the detection signal from 2. That is, as shown in FIG. 9, the reference edge E of the data disc 6 is 238.5 ° (= 3) in the counterclockwise direction with respect to the photo reflector PR2 at the position where the data disc 6 indicates exposed.
60 ° −δ4 + γ4 = 360 ° -139.5 ° + 18.
0 °) separated positions. Since the data disk 6 is rotating at a constant speed in the film rewinding direction, that is, the direction shown by the arrow d2 in FIG. 1, the photo reflector PR2
After detecting the reference edge E of the data disk 6, the data disk 6 should be stopped after td = Td × 238.5 × 360 ⁻¹ (seconds).

Next, in step # 706, the reference edge E of the data disk 6 is changed to the photo reflector PR2.
After confirming that the reference edge E passes through the photoreflector PR1 in step # 708, waiting for td time to elapse, and then in step # 710, the data disk 6 is braked. Stop this.

In the camera of the above embodiment, the film cartridge 2 having the 3-bit code data disk 6 consisting of two narrow bars NB and one wide bar WB is used. A film cartridge having a 3-bit code data disk including a wide space WS and one narrow bar NB can be used in exactly the same manner as the film cartridge 2 of the above-described embodiment. In the film cartridge according to this modified example, the spool for the data disc has three
Since the angle of the bit code is 48 ° (= 20 ° × 2 + 8 °), that is, it is increased by 12 ° compared with the 3-bit code of the film cartridge 2 used in the above embodiment {= 48 ° − (8 ° X2 + 20 °)}, and correspondingly, the black quiet zone BQZ of the data disk of the film cartridge according to this modification.
Is 12 ° from the black quiet zone BQZ of the data disk of the film cartridge 2 of the above embodiment.
It is small, that is, 184 ° (196 ° -12 °).

The film cartridge 2 is provided with an exposed / unexposed display mechanism so that the user can determine the exposed / unexposed state of the film 8 from the appearance of the film cartridge 2. Since the camera includes the display device 102 capable of displaying the exposed / unexposed state of the film 8 of the film cartridge 2 on the camera side, even if the exposed / unexposed display mechanism is not provided on the film cartridge 2 side. Not to mention good things.

[Brief description of drawings]

FIG. 1 is a perspective view of a film cartridge used in a camera according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a part of the film stored in the film cartridge of FIG. 1 as a plan view.

FIG. 3 is a perspective view of a film rewinding fork provided on the camera side, which is fitted into the spool of the film cartridge of FIG.

FIG. 4 is an explanatory view showing a data disk of the film cartridge of FIG. 1 as an enlarged plan view.

5 is an enlarged bottom view of the film cartridge of FIG. 1. FIG.

FIG. 6 is an explanatory diagram showing a relative positional relationship between a data disk and a cartridge case when the film of the film cartridge of FIG. 1 is unexposed (UNPOSED).

FIG. 7: The film cartridge of FIG. 1 is partially exposed (P
FIG. 7 is an explanatory diagram showing a relative positional relationship between a data disk and a cartridge case in the case of (ARTIAL).

FIG. 8: The film cartridge of FIG. 1 has been developed (P
FIG. 6 is an explanatory diagram showing a relative positional relationship between a data disk and a cartridge case in the case of “LOCESSED”.

FIG. 9: The film cartridge of FIG. 1 has been exposed (E
FIG. 6 is an explanatory diagram showing a relative positional relationship between a data disk and a cartridge case when it is set to (XPOSED).

FIG. 10 is a block diagram showing an outline of a circuit configuration of the present camera.

FIG. 11 is an explanatory view showing a battery housing chamber and a battery housing chamber lid of the present camera at right angles to a battery loading direction.

FIG. 12 is an explanatory view showing the battery storage chamber lid of the camera in parallel with the battery loading direction.

13 is an explanatory view similar to FIG. 11 showing a state where the battery storage chamber cover of FIG. 11 is held in a locked state with respect to the camera body.

FIG. 14 is an explanatory view similar to FIG. 12, showing a state where the battery storage chamber cover of FIG. 11 is held in a locked state with respect to the camera body.

FIG. 15 is a flowchart showing a basic flow of the operation of the camera.

FIG. 16 is a flowchart showing an operation of setting a data disc to an exposed position.

FIG. 17 is a flowchart showing a film exposure / non-exposure determination operation executed by the camera.

FIG. 18 is a flowchart showing a film exposure / non-exposure determination operation executed by the camera.

FIG. 19 is a flowchart showing a film exposure / non-exposure determination operation executed by the camera.

FIG. 20 is a flowchart showing a timer interrupt operation.

FIG. 21: EX data disc using one photo reflector (PR1) provided on the camera side
It is a flowchart which shows the operation | movement set to POSED.

FIG. 22: EX data disc using the other photo reflector (PR2) provided on the camera side
It is a flowchart which shows the operation | movement set to POSED.

23 is an explanatory diagram showing a relative positional relationship between a bar code and each photo reflector (PR1, PR2) when the film cartridge shown in FIG. 1 is loaded into the camera.

[Explanation of symbols]

 2 film cartridge 3 film entrance / exit 4 cartridge case 6 data disk 8 film 8a first perforation 8b second perforation 8c magnetic recording area 10 drive hole 12 spool 12a display member 12b display window 12c display window 14 bar code 20 body 22 fork 24 battery storage Chamber 26 Battery Storage Chamber Lid 28 Pivot 30 Actuator 32 Camera Body 34 Lock First Member 36 Lock Second Member 38 First Guide Recess 40 Second Guide Recess 50 Battery BQZ Black Quiet Zone D Reference Point d1 Film Feeding Direction d2 Film Winding Return direction E Reference edge F Frame L1 Lock release position L2 Lock position NB Narrow bar NS Narrow space WB Wide bar WS Wide space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minoru Kido, Inventor Minato Camera Co., Ltd. 2-3-13 Azuchi-cho, Chuo-ku, Osaka-shi, Osaka (72) Inventor Hiroyuki Okada, Chuo-ku, Osaka-shi, Osaka 2-3-3 Azuchicho Osaka International Building Minolta Camera Co., Ltd.

Claims (1)

[Claims] 1. A data disk (6) which rotates integrally with a film winding shaft (12) with respect to a cartridge case (4) and has film data displayed by a bar code (14), said case (4). In a camera which is loaded with a film cartridge (2) having an outer surface and which reads a bar code (14) to detect exposure / non-exposure of a film, a battery storage chamber lid (26) and the battery storage chamber lid (26) are provided. Lock state holding means (30, 34, 38, 120) for holding the camera body (32) in a locked state, and the lock state holding means (30, 34) during the exposure / non-exposure detection operation of the film. , 38, 120) to hold the battery compartment cover (26) in a locked state with respect to the camera body (32).
6, # 22) and a camera.