JPH0476526A - Camera - Google Patents

Abstract

PURPOSE:To discriminate the used state of a film, that is, whether it is a film used, a film taken out halfway or a film already used and to prevent double exposure by detecting the used state of the film and displaying it on a cartridge. CONSTITUTION:Display marks 14a, 14b and 14c such as '1', '2' and '3' displaying the used state of the film are displayed on the upper end face of the cartridge 10. Meanwhile, an index 11a is provided in a spool 11 and three kinds of used states of the film are displayed by the rotation stopping position of the spool 11. In a camera which complies with the reloading of the cartridge which is taken out halfway, information what number of frame photographing is performed to is recorded on the cartridge 10 or a recording medium on the film, and the rotation stopping position of the spool 11 is controlled to be the position of '2' at the time of finishing rewinding the film. At the time of reloading the cartridge 10, the information which is recorded in advance is read from a storage part and photographing to an unexposed part is continued.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a film cartridge that stores photographic film wound around a spool in a roll, and a camera loaded with the same, and particularly relates to a film cartridge in which the film is used,
For example, the present invention relates to a film cartridge having a function of identifying and displaying unused film, partially used film, and used film, and a camera loaded with the film cartridge.

B. Prior Art In a typical 135-type film cartridge, a portion of the film leader is exposed from the cartridge when it is not in use before taking pictures. Therefore, if you wind up part of the film leader into the cartridge when rewinding after shooting, you can check whether the film inside is before shooting or after shooting by checking whether the film leader is coming out of the cartridge. Can be identified.

C6 Problems to be Solved by the Invention However, when the film is exposed halfway, it is rewound into the cartridge and taken out from the camera (e.g. when using a different type of film), a part of the film leader cannot be inserted into the cartridge. If the cartridge is wound up, the film will not be able to be wound inside the camera the next time, so the cartridge will have to be stored with part of the film leader removed, making it impossible to distinguish it from an unused cartridge.

For this reason, there was a danger that a cartridge taken out halfway could be mistaken for an unused cartridge, resulting in double exposure.

Furthermore, in the cartridge disclosed in U.S. Pat. No. 4,832,275, when the cartridge is alone, a part of the film leader is always pulled into the cartridge, making it impossible to distinguish between unused and used cartridges. , there is a risk of double exposure here as well, and the conditions of use of the film,
In other words, is it an unused film or a partially removed film?
It is necessary to identify whether the film is used or not.

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera loaded with a film cartridge that can identify the state of use of the film.

90 Means for Solving the Problems The invention of claim 1 provides a film having a spool around which a film is wound, a cylindrical body rotatably housing the spool, and display identification means for displaying and identifying the usage state of the film. A camera in which a cartridge can be loaded, comprising a first detection means for detecting the usage state of the film, and a driving means for driving the display identification means according to the usage state of the film based on the detection result of the first detection means. and a second detecting means for detecting the film usage state indicated by the display identifying means, wherein the driving means drives and controls the display identifying means based on the detection result of the second detecting means. It is something.

E0 effect A camera loaded with a cartridge in which the usage status of the film in the cartridge (unused, partially removed, used) is identified detects the film usage status with the first detection means on the camera side and detects the film usage status. The state of use is identified and the identification display means provided in the cartridge is driven, and the second detection means detects the state of the display identification means to recognize the state of the loaded film.

For example, since it is possible to determine whether the film is a used film or a partially used film based on the recognition result, processing can be rationally performed when loading the cartridge and before starting shooting.

F. Example First, an outline of this embodiment will be explained, and then details will be explained.

(1) Overview of the cartridge FIGS. 1(a), (b), (C) and FIG. 2 show a cartridge according to the present invention, and FIG. 1 is a top view of the cartridge.

This cartridge 10 is, for example, disclosed in U.S. Patent No. 4,832゜2.
A spool 11 on which the film is wound, and a pair of cases] 2.1 of the same type as shown in No. 75.
3 forms a film storage space (not shown), which includes a cylindrical body CB that rotatably houses the spool 11, an identification section DD that displays and identifies the usage status of the film, and a film feeding mechanism (not shown). I have it. The cylindrical body CB is composed of a pair of cases 12.13 divided into two as shown in FIG. 2, and has a protruding lip portion 10a. Although the details of the film feeding mechanism are omitted, the leading edge of the film is taken into the cartridge 10 from the beginning, and the spool 11
By rotating the , the film is fed out and rewound from the cartridge.

(2) Overview of the display identification function As shown in Fig. 1, the periphery of the upper end surface of the cartridge 10 is divided into four areas, and the usage status of the film in the cartridge 10 is displayed in the three areas "1" and "2". , r3” display symbol 1
4a, 14b, and 14c are displayed by printing or the like. On the other hand, an index 11a that rotates according to the movement of the spool 11 is provided, and display symbols 14a and 14 are provided depending on the rotation stop position of the spool 11.
b or 14C, and three types of film usage states are displayed. In other words, when the display symbol 14a of "1" is specified, it is completely new and unused (unexposed).
When the display symbol 14b of ``2'' is specified for a film, the display symbol 14c of ``3'' is specified for a film that has been taken out of the camera after one or more frames have been photographed and taken out from the camera. When the film is shot, it is configured to display that it is a used (shot) film for which shooting has been completed up to the final frame.

In the example below, when the command is taken out halfway, "2" is displayed in response to the command, and "3" is displayed when the rewinding command is output after shooting has been completed to the last frame. Drive control of the spool 11. Therefore, when the user takes out the film cartridge 10 from the camera, the usage status of the film in the cartridge 10 can be known from this display. In addition, in this embodiment, as described later,
It is configured to reliably prevent double exposure when displaying "2" and "3".

In addition, the above-mentioned display symbols of "rl", r2J, "3"],
4a, 14b, and 14c are 1, such as “mi” and “do”
, "Kan", etc., or other numbers/symbols may be used.

(3) About mid-removal In the case of mid-removal when "2" is displayed, how many frames have already been taken before loading this cartridge 10 into the camera again and continuing to take pictures in the unexposed area? It is necessary to record information on whether it is loaded, retain information, and transmit information to the camera when reloading.

For example, this is an EEPROM or RA on Patrone 10.
A memory section such as M is provided, and the record of this memory section is stored on the camera side.
This can be implemented by providing a reading device, or by coating a magnetic recording medium on the film and providing a magnetic head for writing and reading on the camera side. Note that a detailed explanation of these information processing devices will be omitted here.

(4) Overview of the camera However, when considering a simple or inexpensive camera, it would be a great burden to provide the camera with an information processing device to accommodate the reloading of cartridges taken out midway. Therefore, in this embodiment, both a camera 40A that supports reloading of a partially taken out cartridge and a camera 40B that does not support reloading will be described.

That is, in the camera 40A, when the camera 40A takes out the film midway through shooting, it records information on how many frames have already been shot on the cartridge 10 or on the recording medium on the film, and also records the information on the cartridge 10 or the recording medium on the film when the film is rewinded. The rotation stop position is controlled to the "2" position as shown in FIG. 1(b). When reloading the cartridge 1-O, the recording edge information is first read from the storage section, and the film feeding is controlled so as to continue photographing the unexposed portion.

On the other hand, the camera 40B does not have an information processing device that records information on how many sheets have already been shot when the camera 40B takes out the film midway through shooting, so the rotation stop position of the spool 11 is reached when film rewinding is completed. is controlled to the position r3J as shown in Fig. 1(c), and from then on, the cartridge 1o
Avoid taking pictures with As will be described later, when the rotation stop position of the spool 11 is controlled to "3", loading of the film in both the cameras 4OA and 4B is prevented, or even if it is loaded, a warning is issued or photographing is prohibited.

Also, if you try to load the cartridge 10 in the "2" state, which has been partially taken out with the camera 40A, into the camera 40B, the camera 40B does not have an information reading device, so the unexposed area of the film "2" will start from the unexposed area. cannot be recognized, so loading is mechanically prevented as in case ``3'', or even if loaded, subsequent photographing operations of the camera are prohibited.

Note that if a system is configured that does not take mid-retrieval into account at all, only two status displays, "1" and "3", are sufficient.

(5) Overview of loading prevention function As described above, in this embodiment, in addition to displaying the film usage status, the cartridge 10 is not loaded into the camera when the film is in a specific usage status to prevent double exposure. It has a mechanism to mechanically prevent this. To achieve this, an engagement mechanism is provided on the outside (lower side in the embodiment) of the cartridge 10, which switches between two states, engagement and non-engagement, depending on the state of use of the film.

On the other hand, on the camera side, there is a device that drives the engaging mechanism on the cartridge 10 side to the engaged/disengaged position depending on the state of use of the film, and a device that drives the cartridge 10 to the camera when the engaging mechanism is in the disengaged state. and has a blocking mechanism that prevents loading when in the engaged state.

(6) Overview of the film usage status detection function As mentioned above, in the camera 40A, it is "2".

The cartridge 10 in the display state of "3" can be loaded.

Since the action to be performed by the camera when photographing differs in r2J "3", this detection is performed as the cartridge 10 is loaded. Although details will be described later, this function is achieved by the configuration used to control the rotation stop position of the spool 11.

Next, details of the first to fourth embodiments will be explained in order.

(I) Description of the first embodiment ■-1: Concerning the structure of the cartridge As described above, in this embodiment, one of "1", "r", and "r3J" is displayed depending on the state of use of the film. The camera performs various processes in conjunction with the Therefore, when the cartridge is alone, the rotation of the spool 11
1”, “2J.

It is necessary to prevent the indicated position from shifting between the three display states of r3J.

In FIGS. 2 to 4, the ring 16 and the locking ring 17 are
By regulating the rotation of the spool 11 when the cartridge 10 is not loaded in the camera, this mechanism prevents the spool 11 from rotating and changing the indicated position of I[11a, resulting in incorrect display. be. That is,
The ring 16 is fitted onto the spool 11 below the cartridge 10, and since the protrusion 16a engages with the groove 11b (FIG. 3) of the spool 11, the two rotate together. The locking ring 17 is located on the outer periphery of the ring 16, and is made of a spring material and has a claw portion 17a on the inner periphery that selectively engages with protrusions 16b and 16c provided on the outer periphery of the ring 16. Part 1
7b and 17c are held by hooks formed at the lower joints of the cases 12 and 13 of the cartridge 10 by being caught in the grooves 12a, 12b, 13a, and 13b, as shown in FIGS. 4 and 5. . Then, as shown in Figure 3, Patrone 1
When the spool 11 is alone, the claw portion 17a engages with the protrusions 16b and 16c to restrict rotation of the spool 11.

The engagement between the ring 16 and the locking ring 17 is released when the cartridge 10 is loaded into the camera. That is, Fig. 2,
As shown in FIG. 3, a restriction release pin 42 is provided at the bottom of the cartridge chamber 41 of the cameras 40A, 40B. This restriction release pin 42 is connected to the hole 12 on the cartridge 10 side.
c and push up the locking ring 17 against its springiness as shown by the imaginary line in FIG.
.

16c, allowing the spool 11 to rotate freely. In this case, the locking ring 17 is
．． Since the spool 11 is securely held by the spool 13, no unnecessary friction or load is applied to the rotation of the spool 11.

In addition, in this state, as is clear from FIG. 6, the protrusion 1
The spool 11 can rotate within the intervals 6b and 16c (there are three positions corresponding to the three states of the film), but even if it rotates within this interval, the indicator 11a will not change to the display symbol 14a.
+ 14 b + 14 c. At the end of film rewinding, the spool 11 is controlled to stop at a location within these three intervals that corresponds to the film usage state. The control mechanism will be described later.

Next, referring to FIGS. 7 and 8, the engaging portion 15 of the spool 11 is
The fork 52 on the camera side that engages with this will be explained.

This embodiment has a characteristic shape as shown in the figure, rather than using splines like a normal 135 type cartridge. While the 135-type spline allows engagement in two ways within 360 degrees, this configuration allows engagement only in the rotational position shown in FIG. 8(a), and does not engage in other rotational positions. Such engaging portions 15 are symmetrically provided above and below the spool 11 at the same rotation angle position. Note that FIG. 8(b) shows a state in which engagement is not possible at the rotational position of 180 degrees from FIG. 8(a).

The reason why the structure is configured such that only one type of engagement is possible within 360 degrees is as follows.

As mentioned above, in this embodiment, at the end of rewinding, the spool 1]
is the film used (taken out halfway or used)
However, in the first embodiment and the following two embodiments, this control is performed by detecting the rotational position of the fork 52 of the camera. This is because if two types of engagement are possible within 350 degrees, it is not possible to control the spool 11 to stop at a desired position unless it is known which of the two types of engagement is occurring.

Further, in the lower part of the cartridge 10, two affected parts 24a and 24b are formed approximately 90 degrees apart as shown in FIGS. 2 and 5, and from there, an engagement surface part formed in the lower part of the spool 11 and rotating integrally is formed. 23 is exposed. As shown in FIG. 6, which is a bottom view of the spool 11, the engaging surface portion 23 is formed of an inclined surface 23a and a non-oblique surface 23b every half circumference, and its cross-sectional shape is shown in FIGS. 3 and 4. . Therefore, this slope 23
a and the non-slanted surface 23b are selectively exposed from the windows 24a and 24b as follows depending on the stop position of the spool 11 (the state in which the film is used).

■-2=Configuration of camera 40A The camera 40A is configured as shown in FIG.
As shown in FIG. 10, a control bag fi! controls the rotation stop position of the spool 11 by the spool drive device 50 according to the usage state of the film. 51 (CPU).

The fork 52 engages with the engagement portion 15 on the lower side of the spool 11, receives rotation from the motor 53 via a reduction gear mechanism 55 having a clutch 54, rotates the spool 11, and removes the film from the cartridge 10. Performs forwarding and rewinding. The spring 56 constitutes a well-known retraction mechanism that prevents interference even if there is a phase shift between the engaging portion 15 and the fork 52 when loading the cartridge 10. If there is a phase shift, the fork 52 retracts downward, but the fork 52 always rotates integrally with a shaft 55b which rotates integrally with the fork gear 55a. Note that when winding the film after feeding the film, the clutch 54 connects the fork 52 and the motor 53.
is separated.

Further, the rotational position of this fork 52 is detected by a fork encoder 57. The fork encoder 57 is
A brush 57a that rotates together with the fork gear 55a, a common pattern 57b formed on the substrate, and segment patterns 57c and 57d.

57e etc. Segment pattern 57c.

The states in which the brush 57a is placed on 57d and 57e are as follows:
The indicators 11a are display symbols 14a and 14b, respectively.

14c, that is, the states rlJ, r2J, and "3".

A groove 52a is provided below the fork 52 over the circumference, and a tip 60a of a lever 60 rotatably supported by a fixed pin 61 is engaged therein, and the other end of the lever 60 is engaged with the switch SW3. do.

Therefore, the fork 52 engages with the engagement part 1.5 and the spring 5
6, the switch SW3 is turned on, and when the fork 52b is retracted downward due to a phase shift between the fork 52 and the engaging portion 15 when loading the cartridge 10, the switch SW3 is turned on. turned off,
It is configured to detect engagement/disengagement of the fork 52 with the engagement portion 15.

Furthermore, in FIG. 10, switch SWI is an exposure release switch, switch SW2 is an intermediate rewind inch that is operated when rewinding the film before the final frame has been photographed, and as is well known, the switch SW2 is an intermediate rewind inch that is operated when rewinding the film before the final frame has been photographed. It detects the tension force at and automatically starts rewinding. Reference numeral 58 is a frame number counter that counts the number of frames that have been photographed, and 59 is a film encoder that detects the amount of film movement for advancing the frame of the film. Information from these is sent to the control device 51 and various controls are performed. Reference numeral 63 denotes a display such as a liquid crystal provided outside the camera for informing the user of various information.

Further, as shown in FIG. 11, in a corresponding part of the cartridge chamber 41 through which the window 24a passes when loading the cartridge 10, a loading prevention pin 44 biased by a spring 44a is installed in a direction perpendicular to the loading direction. It stands out and can be advanced or retreated. Therefore, as shown in FIGS. 12(a) and 12(b), the window portion 24a
When the slope 23a is exposed from the window part 24a, the loading prevention pin 44 is retracted by the action of the slope 23a during loading, and loading of the cartridge 10 is permitted. When the non-slope 23b is exposed from the window 24a, loading is allowed. At the same time, the non-slanted surface 23b engages with the loading prevention pin 44, and loading of the cartridge 10 is mechanically prevented. In addition, in FIG. 12, the spool drive device 50
etc. are omitted.

T-3: Operation of camera 40A The operation of the combination of cartridge 1o and camera 40A configured as described above will be explained.

When the cartridge 10 is loaded into the camera 40A and taken out after photographing, the control device 51 determines the usage state of the film and controls the rotation of the spool 11 to the corresponding position.The procedure will first be explained with reference to FIG. do.

In step 5101, it is determined whether the release switch SWI has been operated after loading the cartridge, and if it has not been operated, the process advances to step 51.04, and the spool 11 is
The stop position of is controlled so that its index 11a indicates "1". When operated, proceed to step 5102,
It is determined whether the midway rewind switch SW2 has been operated. When the rewind switch SW2 is operated midway, the process proceeds to step 5105, and the spool stop position is controlled to "2". When the midway rewind switch SW2 is not operated,
It is determined in step 5103 whether the tension force at the end of the film is detected, and if it is detected, the process proceeds to step 5.1.
If the spool stop position is controlled to "3" in step 06, and the tension force at the end of the film is not detected, it is not in any state, but there is an error in the judgment somewhere, so it is displayed in step 5IO7. 63, and then the process proceeds to step 5106, where the spool stop position is controlled to "3". For safety, this is to change the stop position to "
This is to completely prevent double exposure.

As mentioned above, the stopping position of the spool 11 in each state is within the distance between the protrusions 16b, 16c and the claw portion 17a (
(within play), the rotation of the spool 11 may be controlled to stop within this interval. in particular,
When the fork encoder 57 detects that the fork 52 is at a predetermined position, the motor 53 is stopped and the spool 11 is stopped.

Next, the operation when loading the cartridge 10 will be explained for each of the three film usage states.

When loading the cartridge 10, which is stopped at the above "1", the slope 23a is exposed from the window 24a, so the loading prevention pin 44 is retracted by the slope 23a, as shown in FIG.
a)), loading is allowed.

The cartridge 10 that is stopped at "2j" is also allowed to be loaded in the same way. The cartridge 10 that is stopped at "3" is not loaded because the non-slope 23b is exposed from the window 24a. The blocking pin 44 engages with the non-slanted surface 23b to prevent loading (FIG. 12(b)).

Next, when the barrels 1 to 10 that are stopped at "1" or "2" are loaded, which state is in is detected by the procedure shown in FIG. 14.

After loading, turn on/off switch SW3 in step 5201.
It is determined whether the fork 52 is engaged with the engaging portion 15 by determining whether the fork 52 is engaged with the engaging portion 15 or not.
Since it is correctly engaged, the process advances to step 5203. In step 5203.

It is checked whether the common pattern 57b and the segment pattern 57C are electrically connected, and if electrically conductive, the display state of the indicator 11a is determined to be "1" in step 5204, and step 5209 is performed.
Proceed to. If it is determined in step 5203 that there is no conduction, it is checked in step 5205 whether the common pattern 57b and the segment pattern 57d are conductive, and if they are conductive, step 3
In step 206, the status is determined to be "2", and in step 5208, information on the number of photographed frames is read out, and then the process advances to step 5209. If it is determined that there is no conduction in step 5205, it is detected that the state is neither "1" or "2", so an error message is displayed on the display 63 to warn the user. and exit.

On the other hand, if it is determined in step 5201 that the switch SW3 is off, the fork 52 is out of phase with the engaging portion 15 and is not engaged, so in step 5202 the motor 5
3 to rotate the fork 52. As a result, when the fork 52 and the engaging portion 15 are engaged and the switch SW3 is turned on, at that moment, "1" and "2" are determined based on the same judgment as above.
” is detected. In step 5209, if the motor 53 is rotating (step 5202
), it is stopped in step 5210, then the photographing operation is started in step 5211, and the photographing operation is started in step 521.
The process proceeds to step 5213 through the post-shooting rewinding operation (including the rewinding after the final frame shot and the intermediate rewinding) in step 2, where the usage status of the film is determined and the spool 11 is rewinded as described in FIG. Perform rotation stop control and end.

Note that the direction in which the fork S2 is rotated in step 5202 is determined from the film feeding direction or the film feeding direction, since the purpose of rotation is to engage the fork 52 and the engaging portion 15 and detect the position of the spool 11 at that moment. Either direction is acceptable.

Further, in step 5202, the engaging portion 1
Even if the motor 53 rotates the fork 52 that is not engaged with the fork 5, since the breakage 56 is configured to be weak,
The spool 1 due to contact friction before properly engaging the engaging portion 15.
1 will not be rotated.

In this way, the loaded cartridges 10 are "1", "2"
The advantages of determining at which position the vehicle is stopped will be explained below.

For example, as a method of recording information on the number of photographed frames after taking them out mid-way, each frame is recorded on a magnetic medium coated on the film.
Considering the case of recording exposed signals, in order to load the cartridge 10 which is in the stop position "2" in the mid-unloaded state and start the next shooting, the film must be wound one after another and the unexposed signals recorded. An operation to detect the pieces is required. On the other hand, when loading an unused "1" cartridge 1o.

If the camera cannot determine “1” or “2”,
You must also take the same steps to wind the film and check for unexposed signals. but.

If "1" or "2" can be determined at the same time as loading as in this embodiment, such a procedure would be unnecessary and rational.

-4: Configuration of camera 40B The difference from camera 40A will be explained. In camera 40B, the spool 11 is not controlled to stop rotating at the "2" position, so there is no segment pattern 57d in FIG. 9. In addition, as described later, the cartridge 10 in the state "2"
Since loading is prevented, there is no need to judge which state is "1" or "2" after loading, unlike the camera 4OA, and there is no switch SW3 and lever 6Q, which are the only configuration. Furthermore, as shown in FIG. 11(b), instead of the loading prevention pin 44, the cartridge chamber 41 has a spring 4 at a corresponding portion through which the window 24b passes when loading the cartridge 10.
A loading blocking pin 45 biased by 5a protrudes so as to be movable forward and backward in a direction perpendicular to the loading direction. Therefore, Fig. 12 (
As shown in a) and (b), from the window portion 24b to the slope 23
When the slope 23b is exposed, the loading prevention pin 45 is retracted by the action of the slope 23a during loading, and loading of the Parrone 10 is allowed. When the non-slope 23b is exposed from the window 24b, As loading occurs, the non-slanted surface 23b engages the loading prevention pin 45.
loading of the cartridge 10 is mechanically prevented. In addition, the control of the control device 51 also controls the camera 4 as described later.
It is different from 0A.

■-5; Camera 40B and cartridge 10 configured as above for operation in camera 40B
The operation in combination will be explained.

When the cartridge 10 is loaded into the camera 40B and taken out after photographing, the control device 51 determines the usage state of the film and controls the spool 11 to stop rotating at the corresponding position. In FIG. 13, when it is determined in step 5102 that the switch SW2 has been operated, the process proceeds to step 5106 and the camera 4 is controlled to the stop position "3" (indicated by the dotted line in FIG. 13).
The procedure is similar to that of 0A. That is, camera 4. With OB, if you take out the cartridge midway through shooting, it does not have a device to record information on how many shots have already been taken, so it is controlled to the stop position "3" and from then on, the cartridge 10 is taken out. Avoid taking pictures with

Next, the operation when loading the cartridge 10 will be explained for each of the three film usage states mentioned above.

When loading the cartridge 10 in the stopped state in [1], since the slope 23a is exposed from the affected part 24b, the loading prevention pin 45 slides and retreats on the slope 23a, allowing loading. In the cartridge 10 in the stopped state of "2j, 3",
Since the non-slanted surface 23b is exposed from the window portion 24b, the loading prevention pin 45 engages with the non-slanted surface 23b to prevent loading.

(II): Second Embodiment In the first embodiment, the cartridge 10 that cannot be used with the camera (the cartridge stopped at "3" for camera 40A, and stopped at "2" or "3" for camera 40B) However, in cases where it is spatially difficult to provide the loading prevention pins 44 and 45 in the cartridge chamber 41, a mechanical loading prevention method can be used as in the second embodiment. It may be configured such that the status of the cartridge is determined after it is loaded, and if the cartridge cannot be used with the camera, a display/warning is displayed and subsequent photographing operations are prohibited. This second embodiment uses the cartridge 10 of the same type as the first embodiment, with the camera side modified in this manner.

11-1: Structure of Cameras 4OA and 40B With respect to the light shown in FIG. 9, both cameras 40A and 40B have the same structure as the camera 40A of the first embodiment. Also camera 4
Both OA and 40B are loading prevention pins 44 shown in FIG.
．． A mechanical blocking mechanism such as 45 is omitted. Further, the control of the control device 51 is slightly different for both cameras as will be described later.

11-2: Operation of the camera 40A Since the configuration is as described above, the cartridge 10 can be loaded into the cartridge chamber 41 regardless of its state, so that the subsequent processing is devised.

FIG. 1S shows the procedure after loading the cartridge. Here, the cartridge chamber status is detected using the fork encoder 57 in a procedure similar to that of FIG. 14 of the first embodiment.

In step 5301, it is determined whether the switch SW3 is on or off, and it is checked whether the fork 52 is engaged with the engaging portion 15. If it is on, the fork 52 and the spool 11 are correctly engaged, so step 5303 If it is off, the fork 52 is rotated and engaged with the engaging portion 15 in step 5302. In step 5303, it is checked whether or not the common pattern 57b and the segment pattern 57c are electrically connected. If electrically conductive, it is determined in step 5304 that the state is r1, and the process proceeds to step 8308. If it is non-conductive in step 5303, it is checked in step 8305 whether the common pattern 57b and segment pattern 57cl are conductive, and if they are conductive, the state is determined to be "2" in step 5306.
In step 5307, it is determined which frame to continue photographing from, and then the process advances to step 5308. If there is no conduction in step 5305, it is checked in step 5313 whether the common pattern 57b and segment pattern 57e are in conduction, and if they are conductive, it is determined that the state is "3" in step 8314, and the process proceeds to step 5315, in which the film is in the state "3". After displaying and warning on the display 63 that no more photography is possible due to this, the process advances to step 5317. If it is non-conducting in step 5313, it is detected that it is not in any of the states "1", "2", and "3", so in step 8316, an error is displayed on the display 63, a warning is given, and the process proceeds to step 5317.

In step 5317, whether the motor 53 is rotating (
In step 5302, it is determined whether the object is rotating (if it is rotating), and if it is rotating, it is stopped in step 5318, and then the process ends.

In step 8308, it is determined whether the motor 53 is rotating, and if it is not rotating, the process proceeds to step 5310; if it is rotating, it is stopped in step 5309, and then the process proceeds to step 5310. In step 5310, a photographing operation is performed, and in step 5311, a rewinding operation (including rewinding after photographing the final frame and intermediate rewinding) is proceeded to step 5312.
As in FIG. 13, the usage state of the film is determined, the rotation of the spool 11 is controlled to stop, and the process ends. Therefore, the state “
The photographing operation is allowed for the cartridges 10 of "1" and "2", and the photographing operation is prohibited for the cartridges 10 of "3".

ll-4: Operation of camera 40B What is different from camera 40A is that patrone 1 is in state "2".
This is the control when 0 is loaded, and in Fig. 15,
Step 5307 is omitted and the process proceeds from step 8306 to step 5315 instead of step 5307 (
(dotted line on Figure 15).

Therefore, the photographing operation is allowed in the cartridge 10 in the state rIJ, and the photographing operation is prohibited in the cartridge 1° in the "2" and "3" states.

(III) Third Embodiment In the first embodiment, the fork encoder 57 was used to control the rotation of the spool 11 and detect the state of the cartridge 10 during loading. In contrast, in this embodiment, a photosensor provided at the bottom of the cartridge chamber 41 performs the same function.

lll-1: Structure of the cartridge 10 The cartridge 10 in this embodiment differs from the cartridge 10 in the first embodiment only in the engagement surface portion 23, and as shown in FIG. 16, the engagement surface portion 23 is approximately Slope 2 that occupies half the circumference
3c and 23e, a narrow non-slanted surface 23cl located in the center of these, non-slanted surfaces 23f and 23h occupying approximately half the circumference on the opposite side thereof, and a narrow sloped surface 23g located in the center thereof. Depending on the stop position of the spool 11, these are selectively exposed through the windows 24a and 24b as follows.

III-2: Structures of cameras 40A and 40B are as shown in FIG. 17, and the same parts as in the first embodiment are given the same numbers and explanations are omitted.

Reference numeral 64 denotes a reflective photosensor provided at the bottom of the cartridge chamber 41, and is provided below the opening 41a provided at a position corresponding to the window portion 24b when the cartridge 10 is loaded. This is as shown in FIG. 18(a), where the window 24
When the slopes 23c, 23e, and 23g are exposed from the window 24b, the emitted light is not received, so a low level signal is output, and the non-slope 23 is exposed from the window 24b as shown in FIG. 18(b).
d.

When 23f and 23h are exposed, they receive the emitted light and output a high-level signal. Furthermore, as shown in FIG. 11 of the first embodiment, the camera 4OA further includes a spring 4 on the inner wall of the cartridge chamber 41, specifically the inner wall corresponding to the portion through which the window 24a passes when loading the cartridge 10.
A loading prevention pin 44 that is biased by 4a protrudes. On the other hand, in the same manner as described above, the camera 40B has a loading prevention pin 45 protruding from the inner wall corresponding to the portion through which the window portion 24b passes when the cartridge 10 is loaded, and is biased by a spring 45a. The function of these loading prevention pins 44, 45 is as follows.
This is similar to the example.

FIG. 19 is a block diagram corresponding to FIG. 10 of the first embodiment, and the same parts are given the same numbers and the explanation will be omitted. 64 is the photo sensor already mentioned.

lll-3: Operation in Camera 4OA First, the rotation stop control of the spool 11 during film rewinding will be explained.

During rewinding, the spool 11 and the engaging surface portion 23 interlocked with the spool 11 rotate in the Y1 direction in FIG. 16. Note that the position of the window portion 24b is shown in the figure. As the engagement surface portion 23 rotates, the photosensor 64 outputs a signal as shown in FIG. 20. 0 is one period corresponding to one rotation of the engagement surface portion 23, and tl,
t2. t3 and t4 are slopes 23c and 23e, and non-slope 23f, respectively.

23h corresponds to the moment when the photosensor 64 detects. Therefore, if the spool 11 is stopped by the control device 51 after detecting the fall of Pl, the spool 11 will be stopped at the position where the slope 23e faces the window portion 24b, and if the spool 11 is stopped after the rise of P2 and P3 is detected. , the non-slanted surfaces 23f and 23h stop at positions facing the window portion 24-b, and these correspond to the display states of "1", "2", and "3", respectively.

It is possible to detect these falling and rising edges within one period tO using a well-known technique, and the details will be omitted. Note that the determination as to in which state the rotation of the spool 11 should be controlled is based on the procedure shown in FIG. 13 of the first embodiment.

Next, the operation when loading the cartridge 10 will be explained.

When loading the cartridges 10 in display states "1" and "2", since the slopes 23c and 23e are exposed from the window 24a, the loading blocking pin 44 is retracted and loading is permitted.

When the cartridge 10 is loaded into the cartridge chamber 41,
The display state of "1" or "2" is detected. "1
'', the slope 23e is exposed from the window 24b by 5, and when it is ``2'', the non-slant 23f is exposed, so the judgment is made using this fact. That is, the signal of the photosensor 64 is checked, and if it is low level, it is determined to be "1", and if it is high level, it is determined to be "2".

When loading the cartridge 10 in state "3", the non-slanted surface 23f is exposed from the window 24a, so it engages with the loading blocking pin 44 and loading is mechanically blocked.

lll-4: Operation with camera 40B The rotation stop control of the spool 11 when rewinding the film after photographing is the same as that of the camera 40A, except that it is not controlled to the "2" position. When controlling to state "1", the spool 11 is stopped after detecting the fall of Pl in FIG. 20, and when controlling to state "3", P3 is stopped.
The spool 11 is stopped after detecting the rise of the spool 11.

Next, the operation when loading the cartridge 10 will be explained.

When loading the cartridge 1o in condition 1j, the window 24b
Since the slope 23e is exposed, the loading prevention pin 45 is retracted and loading is permitted. When loading cartridges 10 in states "2" and "3", each non-slanted surface 23 is opened from the window 24b.
Since f and 23h are exposed, they engage with the loading prevention pin 45 and loading is mechanically prevented.

(IV) Fourth Embodiment In the third embodiment described above, the cartridge 10 is in a state where it cannot be used with the camera (the cartridge stopped at the "3" position for the camera 40A, and "2" and "3" for the camera 40B).
The cartridge (which is stopped at the position 44.) was mechanically prevented from being loaded, but a loading prevention pin 44.
45, the status of the cartridge is determined after loading, as in the fourth embodiment, and if the cartridge cannot be used with the camera, a display/warning is displayed and the subsequent steps are taken. It may be configured to prohibit the photographing operation. This fourth embodiment has the same cartridge 10 as the third embodiment.
The camera side has been improved in this way.

IV-1: Configuration of cameras 40A, 40B As shown in FIG. 21, cameras 4OA, 4. In addition to the photosensor 64 similar to the third embodiment, the OB includes a second reflection type photosensor 65 at the bottom of the opening 41b provided at a position corresponding to the affected area 24a when loading the cartridge 1o in the cartridge chamber 41. has. Further, the loading prevention pin 44.4S in the third embodiment is not provided.

■■-2: Operation with cameras 40A and 40B Regarding the rotation stop control of the spool 11 when rewinding the film after shooting,
This is carried out using a signal from the photosensor 64 in exactly the same way as in the third embodiment. In addition.

Here, control may be performed using the signal from the photosensor 65, but in this case, the stop position if r IJ , r2J
, "3" in FIG. 20, PL, P2. The spool IJ will be stopped after detecting a portion other than P3, but the details will be omitted.

Regarding the operation when loading the cartridge 10, since there is no loading blocking pin 44.4S, loading of all the cartridges 10 in the states "1", "2", and r3J is possible. When the cartridge 10 is loaded into the cartridge chamber 4], the window 24a,
Since the engaging surface portion 23 exposed from 24b is as described in the third embodiment, it is possible to detect which state it is in by combining the signals from the photosensors 64 and 65. That is, photosensor 64:L photosensor 65:L → "1"
Photo sensor 64:H photo sensor 652L →
"2j photosensor 64:H photosensor 65:H
→ It is judged as “3”. Patrone 1 like this
The processing after determining the 0 state may be performed in the same manner as shown in FIG. 15 of the second embodiment, and detailed explanation will be omitted.

In Embodiment 3.4, a reflective photosensor is provided at the bottom of the cartridge chamber 41 as a detection element for the engagement surface section 23, but it may also be provided at the side corresponding to the windows 24a and 24-b. Furthermore, as shown in FIG.
6 and a light receiver 67 in combination.

Furthermore, in the 3.4th embodiment, the position of the spool 11 is not indirectly detected from the position of the fork 52 using the fork encoder 57, but the position of the engaging surface portion 23 integrated with the spool 11 is directly detected. so fork 5
2 and the engaging portion 15 do not need to be configured so that they engage only in one way in 360 degrees, and may be a spline like the conventional 135 type.

Furthermore, in the fourth embodiment, as a method for detecting the position of the spool 11 in order to control the rotation stop of the spool 11 and to determine the state of the loaded cartridge 10, the engaging surface portion 23 is formed with a non-slanted surface over the entire circumference, A high reflectance color (for example, white) is applied to the part corresponding to the slope 23e, and the non-slope 2
Add a medium reflectance color (for example, gray) to the part corresponding to 3f.
A low reflectance color (for example, black) may be printed on the portion corresponding to the non-slanted surface 23h, and these may be identified by a photosensor 64 provided at a position facing the window portion 24b.

In each of the embodiments of the present invention, the fork encoder 57 is used as a device for controlling the rotation stop of the spool 11 and determining the state of the loaded cartridge 10 in the first and second embodiments.
In the 3.4th embodiment, a photo sensor 64.65 was used. However, the invention is not limited to this, and a fork encoder may be used as a device for controlling the rotation stop of the spool 11, and a photo sensor may be used as a device for determining the state of the loaded cartridge 10, or vice versa. A combination of photosensors may also be used.

Effects of the G0 Invention According to the invention of claim 1, when a cartridge having a means for displaying and identifying unused film, a partially taken out film, and a used film is loaded into a camera, the usage state of the film indicated by the display identifying means can be checked. Since a camera capable of detection is provided, post-loading processing can be rationally performed depending on the detected film usage state.

Further, according to the invention of claim 2, since the detection means is also used as the detection means when driving the display identification means to a predetermined position by a command from the camera side, a simplified camera is provided. can.

[Brief explanation of the drawing]

FIGS. 1(a), 1(b), and 1(c) are diagrams showing the film usage status display function of the cartridge according to the present invention. FIG. 2 is a perspective view of a part of the cartridge chamber of the first and second embodiments. Figures 3 and 4 are the lines ■-■ and r in Figure 5, respectively.
FIG. 2 is a vertical cross-sectional view of the cartridge along the V-rV line and a vertical cross-sectional view of the main part from another direction. Figures 5 and 6 show the V in Figure 3 when the state is "1".
-■ line, VI-VI line sectional view. FIG. 7 is an enlarged perspective view of the fork and the engaging portion. FIGS. 8(a) and 8(b) are views showing engagement between the fork and the engaging portion. FIG. 9 is a perspective view of the cartridge and camera-side film rewinding mechanism of the first and second embodiments. FIG. 10 is a block diagram of the spool drive device and its control device on the camera side. FIG. 11 is a perspective view showing the cartridge in each state and loading prevention using two types of cameras. FIGS. 12(a) and 12(b) are diagrams showing the function of the loading prevention mechanism. FIG. 13 is a flowchart of the procedure for determining the usage status of the film. FIG. 14 is a flowchart of the processing after loading the cartridge in the camera 40A. FIG. 15 is a flowchart of processing after cartridge loading in the second embodiment. FIG. 16 shows the engaging surface portion 23 of the cartridge of the 3.4th embodiment.
FIG. FIG. 17 is a perspective view of the bottom of the cartridge chamber of the cartridge and camera of the third embodiment. FIGS. 18(a) and 18(b) are diagrams showing the function of the photosensor 64. FIG. 19 is a block diagram of a camera according to a third embodiment. FIG. 20 is a diagram of the output signal of the photosensor 64. FIG. 21 is a perspective view of the bottom of the cartridge chamber of the cartridge and camera of the fourth embodiment. FIGS. 22(a) and 22(b) are diagrams showing modified examples of the photosensor. 11 Varnish spool 14a, 14b, 14c: Display symbol 16: Ring 17: Locking ring 23c, 23e, 23g: Slope 23h: Non-slope 40A, 40B: Camera 42: Regulation release pin 50 Varnish spool parking device 52: Fork 60 Nilever DD = Display identification part 10: Patrone 11a: Index 15: Engagement part, 16b, 16c: Protrusion 17a: Claw part 23a. 23b, 23d, 23f. 24a, 24b: Window 41: Patrone chamber 44.45: Loading prevention pin 51: Control device (CPU) 57: Fork encoder 64.65: Photo sensor

Claims (1)

[Scope of Claims] 1) A camera into which a film cartridge can be loaded, which includes a spool on which a film is wound, a cylinder body rotatably housing the spool, and display identification means for displaying and identifying the usage status of the film. a first detection means for detecting the usage state of the film according to an operation command from the camera; and a driving means for driving the display identification means according to the usage state of the film based on the detection result of the first detection means. and second detection means for detecting the film usage status indicated by the display identification means. 2) The camera according to claim 1, wherein the drive means drives and controls the display identification means based on the detection result of the second detection means.