JPH03267933A - Film cartridge and camera loaded with the same - Google Patents

Abstract

PURPOSE:To allow the sure and easy recognition of the use state of the film in the film cartridge by forming display parts for the use state of the film on the outside surface of the cartridge and indicating any of the display parts by the rotation stop position of a spool. CONSTITUTION:At least the two display parts 14a to 14c which display the use state of the film in the cartridge 10 are formed on the outside surface of the cartridge 10 and the indicating means 15 which displays the use state of the film by indicating any of the display parts 14 by the rotation stop position of the spool 11 is provided. Means 16, 17 which restrain the deviation in the instruction position by this instructing means 15 at times exclusive of the time loading to the camera are selectively installed. Whether the film in the cartridge is unused, is taken out at an intermediate point or is already photographed is easily discriminated and checked in this way.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a film cartridge containing photographic film wound around a spool in the form of a roll, and a camera loaded with the film cartridge, and in particular to a film cartridge in which the film is loaded. The present invention relates to a film cartridge having a function of identifying and displaying the state of the film, that is, whether the film is unused, partially used and taken out, or used (photographed), and a camera in which the film cartridge is loaded.

[Conventional technology]

Generally, photographic film is handled in a cartridge, which is a simple container with a light-shielding function, and the film is protected from exposure during loading and unloading into the camera, as well as during storage and transportation. ing.

By the way, in such a film patrone,
Is the film stored in the cartridge unused?
It may be necessary to confirm whether the camera has been used (photographed). In conventional 35-roll film cartridges, the tip of the film is used to feed out the cartridge to determine whether the film stored inside is unused or has been photographed. This was done by checking to see if it was coming out of the mouth.

In other words, when rewinding the film at the end of shooting, the film, including its leading edge, is wound into the cartridge in most cases, making it possible to identify whether the film is unused or has been shot. It was.

[Problem to be solved by the invention]

However, with the above-mentioned method of identifying the usage status of the film based on whether or not the leading edge of the film is protruding from the cartridge, it is difficult to ensure that the leading edge of the film is wound into the cartridge when rewinding the film after shooting. However, it cannot be said that reliable identification can be performed. In particular, if a photographed film cartridge is removed from the camera with the leading end of the film protruding from the cartridge for some reason and then stored, there is a risk that the cartridge may be mistaken for unused film. Moreover, when such a cartridge is loaded into a camera, it is possible to take pictures as is, so the problem of double exposure cannot be avoided.

Furthermore, some photographers do not shoot the final frame of the film loaded in the camera, but instead rewind it while the film is being fed, take it out of the camera, and then reload it into the camera later to capture the remaining frame. In some cases, a method of photographing the film is taken, and in this case, when rewinding, great care is taken to avoid getting the leading edge of the film caught inside the cartridge. In such cases, the film is always stored with the leading edge of the film sticking out of the cartridge.
It was indistinguishable from a new cartridge containing unused film.

For this reason, methods such as handwriting on the outside of the cartridge or its storage case have been adopted to indicate the status of use of the film in the cartridge, but this is unavoidable, and such problems cannot be avoided. It is hoped that some kind of countermeasure will be taken to eliminate the problem.

Further, as a cartridge for storing film, for example, U.S. Pat.
JP-A-67329 and the like proposes a type in which the tip of the film is always pulled into the cartridge when the cartridge is alone. In addition, with such a cartridge, the identification method using the film tip of the 35mm film cartridge described above cannot be used at all, and furthermore, even if a film that has already been shot is loaded into the camera, it is possible to take pictures as is. The problem of double exposure as mentioned above cannot be avoided, and even with this type of cartridge, it is easy to distinguish whether the film is unused, taken out midway, or used (shot). It is necessary to take whatever measures are possible.

[Means to solve the problem]

In order to meet such demands, the film cartridge of the present invention has at least two display parts formed on the outer surface of the cartridge to display the usage status of the film in the cartridge, and also has a display part that displays the usage status of the film in the cartridge. An indicating means is provided for displaying the film usage status by indicating one of the display sections according to the rotation stop position of the spool, and furthermore, the shift of the indicated position by the indicating means can be detected when loading the camera. A means for restraining the vehicle at other times is selectively added. Further, the camera according to the present invention loaded with such a film cartridge includes a spool drive device that rotationally drives the spool of the cartridge, and a control device that controls the rotation stop position of the spool by this drive device according to the usage state of the film. The configuration includes the following.

Further, in the film cartridge according to the present invention, a part of the outer part of the cartridge changes into one of two states, ie, engaged and disengaged, depending on the state of use of the film, allowing or preventing loading of the cartridge into the camera. In this embodiment, an engaging means is provided for this purpose. Further, the camera according to the present invention loaded with such a film cartridge has a means for changing the engaging means in the cartridge into an engaged state or a disengaged state depending on the state of use of the film, and a means for changing the engaging means in the cartridge into an engaged state or a disengaged state depending on the state of use of the film, and a means for changing the engaging means in the cartridge into an engaged or disengaged state, The device is configured to include a means for allowing the cartridge to be loaded into the cartridge chamber when it is in the engaged state, and to prevent loading the cartridge into the cartridge chamber when it is in the engaged state.

[Effect]

According to the present invention, the usage state of the film in the cartridge,
In other words, identification indicators such as unused, partially removed, used (photographed), etc. are displayed on the outer surface of the film cartridge in conjunction with the movement of the spool, and are selectively stopped at desired rotational positions by the spool drive device on the camera side. This can be done by using an indicating means and at least two display sections selectively instructed by the indicating means.

Further, according to the present invention, the engaging means provided on a part of the outer S portion of the cartridge is engaged or engaged depending on whether the film is unused, taken out midway, or used.
By controlling the switching to the disengaged state, it is possible to prevent the reloading operation of the used film cartridge when loading the cartridge into the cartridge chamber on the camera side.

〔Example〕

Figure 1 (a), (b), (c) to Figure 11 (a)
) and (b) show a first embodiment of a film cartridge and a camera loaded with the film cartridge according to the present invention, and show the actual results! ! In ffI4, the leading edge of the film is taken into the cartridge 10 from the beginning, and the spool 11 is rotationally driven, as shown in, for example, U.S. Pat. No. 4,832,275, as the film cartridge 10. A structure in which the film is fed out and rewound from the tip is used. Here, this cartridge 10 has a shape including a cylindrical main body part 10a and a lip-shaped film delivery part 10b protruding from a part thereof, and has a pair of cases 12 divided into two parts as shown in FIG. , 13, and furthermore, a storage space for a film (not shown) wound around the spool 11 is formed inside the spool 11, and a film feeding mechanism (
(not shown), etc., but the details thereof will be omitted.

Now, according to the present invention, the above-mentioned film cartridge 1
As is clear from FIGS. 1 to 3, approximately half the circumference of the upper end surface of the cartridge 10 is divided into three parts, and in these parts the usage status of the film in the cartridge 10 is displayed. Then, as the display part of 3) rl'', r
Identification symbols 14a, 14b, 14c for "2", r3° are displayed by printing or the like, and the display symbols 14a, 14b rotate according to the movement of the spool 11 on which the film is wound, and depending on the rotation stop position of the spool 11. , 14c
A key 15 on the upper end of the spool shaft serves as an instruction means for displaying the film usage status by instructing one of the following.
This key 15 and the display symbols 14a, 14b,
14c, it is possible to indicate the use status of the film, that is, whether it is unused (unexposed), taken out midway, or used (photographed).

The above-mentioned identification symbols 14a, 14b, and L4c of ``rl'', ``r2'', and ``3J'' are completely new and unused (unexposed), respectively, and are those that have been photographed in the middle of the final frame with - or more frames. Used (photographed) items that were taken out of the camera during the process, and those that were taken out of the camera at the final frame.
Figure 1 (a) shows the state in which each is indicated.
,(b).

Shown in (C). In this case, the above-mentioned display symbols may be, for example, characters such as "un", "dou", "kan", or other symbols.

In addition, in the case of an intermediate removal state indicated by "2" among these display symbols, in order to load the cartridge 10 into the camera again and continue photographing on the still unexposed film part, what has already been done? The camera 4 is equipped with a means for recording and storing information on whether photographic exposure has been completed up to the sheet edge, and further transmitting this information to the camera that is being reloaded.
This can be implemented by providing the 0A and the cartridge 10.

That is, the recording means for recording and reading information on the camera 40A side can be recorded on the cartridge 10 side using various information recording media such as the EEPRO 14.

This can be solved by providing a RAM or a magnetic recording medium.

However, such a configuration is not necessarily required, and if the camera 40B is of a simple type, the above-mentioned information is not recorded, and even if it is taken out midway, it will be treated as if it has been used (photographed). Alternatively, the sheet may be subjected to development processing without being loaded again, which would cause double exposure. In this case, it is not necessary to take out "2" midway as the above-mentioned display symbol, and only two may be displayed.

That is, according to the present invention, it can be used for both of the two types of cameras 40A and 40B, which are distinguished depending on whether or not they can record information, and it is preferable to display identification according to the type. , camera 40A that can record information
In the case of "1" or "2" mentioned above, loading of the camera 40A into the cartridge chamber 41 is permitted, and "3"
In the case of a camera 40B that cannot record information, it is preferable to configure the cartridge chamber 41 to be loaded only in the case of "1".

On the other hand, according to the present invention, as shown in FIGS. 3 to 5, the camera 4
It is preferable to selectively provide a means for restraining at times other than loading into A and 40B. Here, in these figures, reference numeral 16 is a ring fitted to the lower part of the spool 11 in the lower chamber part of the cartridge 10, and 16a is a ring provided on the spool 11.
A protrusion 17 that engages with the groove 11a formed in the lower part and rotates both of them together is a claw portion 17 that is arranged on the outer peripheral side of the ring 16 and selectively engages with the locking protrusion 16b.
This is a locking ring made of a spring material having a portion a on the inner peripheral edge, and the hooks protruding from the outer peripheral edge of this locking ring 17 are portions 17b, 17.
As shown in FIG. 5, the hooks formed at the lower joint portions of the gauges 12 and 13 constituting the cartridge 10 are held by the hooks 12a, 12b; 13a, 13b. As is clear from Fig. 4, Patrone 10
When the spool 11 is a single unit that is not loaded into the camera, the claw portion 17a is in a position where it can engage with the locking protrusion 16b on the ring 16 side, and the rotation of the spool 11 is restricted. In this state, as is clear from Fig. 7, the ring weighs 16g! The same effect is only possible within the gap between the plurality of locking protrusions 16b, and the movement of the spool 11 is restricted within this gap when rewinding is completed. This setting is made so that the key 15 provided on the spool 11 does not deviate from the area marked with display symbols 14a, 14b, and 14b. In other words, this rotation restriction is such that when the patrone IO is a single unit, the rotation of the spool 11 in FIG.
This is to prevent the indicated position from shifting from "1" to a position indicating another "2" or "3".

In addition, in such a configuration, when the cartridge 10 is loaded into the cartridge chamber 41, the restriction release bin 42 protruding from the bottom of the cartridge 10 engages with the hole 12c on the side of the cartridge 10, and the locking ring 17 is moved to the fourth position. As shown by the imaginary line in the figure, the claw portion 17a is pushed up against the spring property of the locking protrusion 16.
The spool 11 is maintained in a position where it does not engage with the spool 11, and is configured to allow free rotation of the spool 11. In this case, the locking ring 17 is securely supported by the case 12.13, and there is no problem of unnecessary friction or load being applied to the rotation of the spool 11.

Here, the cameras 40A and 40B of the present invention loaded with the above-described film cartridge 10 include a spool drive bag W50 that rotationally drives the spool 11 of the cartridge 10, as shown in FIGS. 2 and 8, etc. This driving bag W5
The film is configured to include a control device 51 that controls the rotation stop position of the spool 11 according to the state of use of the film. To explain this in detail, in Figure 2, 52
is a fork that engages with a key 15a that is provided on the lower side of the spool 11 and rotates integrally with the to-side key 15, which is the instruction means, and is a reduction gear machine [55] having a clutch 54 from a film rewind motor 53. The spool 11 is configured to receive rotational transmission through the spool 11 and rotate the spool 11 in a rewinding manner. Note that 56 is the key 15 when loading the cartridge.
This is a well-known fork retraction mechanism for correcting a phase shift between the fork 52 and the fork 52, and the connection between the fork 52 and the key 15a is disconnected during winding.

Further, the rotational position of this fork 52 is determined by the reduction gear mechanism 5.
A brush 57a rotates together with the final gear (fork gear) 55a of No. 5, and a common pattern 57 formed on the substrate.
b, detected by the fork encoder 57 using a segment pattern 57c, etc. Furthermore, in FIG. 8, SWI is a release switch, and SW2 is an intermediate rewind switch that is operated when rewinding before the end of shooting the last frame.
Furthermore, when shooting ends at the last frame, the tensioning force at the end of the film is detected and rewinding is automatically started, as is well known.

Here, 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 film frame by frame. Information from each of these parts is sent to the arithmetic control circuit CPU. The stopping position of the fork 52 in the rotational direction by the motor 53 is controlled based on the result obtained here.

In such a configuration, at the end of winding, the control device 51 on the camera 40A, 40B side determines the usage status of the film and controls the spool 11 to the corresponding position.The procedure for this determination is shown in FIG. As shown. That is, in step 101, it is determined whether or not the release switch SWI has been operated after loading the cartridge, and if it has not been operated, the process proceeds to step 104, where the stop position is controlled to "1", and if it has been operated, Proceeding to step 102, it is determined whether the midway rewind switch SW2 has been operated. When it is determined, the process proceeds to step 105, where the stop position of the key 15, which is the instruction means, is controlled to "2", and when SW2 is not operated, it is determined whether or not the tension force at the end of the film has been detected. It is determined in step 103, and if determined, the stop position is controlled to "3" in step 106, and if it is not detected, the process returns to step 101. Further, as described above, the cartridge 10 and the camera 40 do not have an information recording means.
If it is B, the configuration may be such that when the operation of SW2 is determined in step 102, the process proceeds to step 106. Note that instead of step 103, the number of possible shots of the film may be read by means such as Dx, and it may be determined whether or not the number of shots matches the value of the frame number counter 58.

Moreover, the stop position of the key 15 of the spool 11 mentioned above is
As is clear from FIG. 7, there is an allowance for the angle at which the spool 11 should stop in relation to the display area, so it is preferable to control the spool 11 to stop within this angle. The stop angle range of the spool 11 with a margin is configured to match the angle corresponding to the pattern 57c of the fork engine 7-da 57 in FIG. 2, and the spool 11 is controlled to stop. After that, the brush 57a may be used to detect whether or not it is on a predetermined pattern 57c, and if it is off, the control may be performed by rotating it again.

According to the above configuration, despite the simple configuration, the use status of the film in the cartridge 10, that is, the unused,
rl4.
1 (a), (b),
As is clear from (C), this can be done extremely easily and reliably just by visually checking the upper end of the cartridge 10, and not only can film management be performed appropriately, but also
It is possible to eliminate the problem of double exposure caused by loading a used cartridge 10 into the camera 40 as in the past.

Furthermore, according to the present invention, a part of the outer part of the film cartridge 10 (in this embodiment, the lower end side part) changes into one of two states, ie, engaged and non-engaged, depending on the usage state of the film. Engagement means (based on the sloped surface 23a, the non-slanted surface 24b, and the windows 24a, 24b) are provided for allowing or preventing loading of the camera 40 of the cartridge 10 into the cartridge chamber 41. The camera 40 loaded with this cartridge 10 is provided with a means (in this embodiment, by rotation of the spool 11) for changing the engaging means of the cartridge 10 into an engaged state or a disengaged state depending on the state of use of the film. When the engaging means is in the disengaged state, the cartridge 10 is allowed to be loaded into the cartridge chamber 41, and when the engaging means is in the engaged state, the cartridge 10 is prevented from being loaded into the cartridge chamber 41. Blocking bin 44
．． 45).

This is shown in Figures 6, 7, 10, and 11 (a).
, (b). At the lower end of the spool 11, as shown in FIGS. These slopes 23 are formed with the angular positional relationship shown in
A or a non-slanted surface 23b is formed at a predetermined interval on the side of the lower end of the case 13 forming the cartridge 10.
and is configured to be selectively exposed through the second windows 24a, 24b. Here, the cartridge 10 is loaded and stored in the cartridge chamber 41 of the cameras 40A and 40B in the direction of the arrow in FIG.
A first loading prevention bin 44, which is biased by a spring 44a, protrudes in a state where it can move forward and backward in a direction perpendicular to the loading direction, and on the camera 40B side, the cartridge 1
First and second loading prevention bins 44, 45, which are biased by springs 44a, 45a, respectively, protrude from the portions through which the first and second window portions 24a, 24b of 0 pass.

In such a configuration, FIG. 11(a).

As shown in (b), loading is prevented when the non-slope 23b of the engagement surface 23 is exposed from the windows 24a and 24b, and loading is permitted when the slope 23a is facing. ing. Here, in the state shown in rl,
Both the first and second window portions 24a and 24b have slopes 23a.
, 23a faces, and in the state shown in "2", the first window part 2
4a has a slope 23a, and the second window 24b has a non-slope 2
3b faces, and in the state indicated by "3", the first window part 24a
A non-slanted surface 23b is provided on the second window portion 24b, and a sloped surface 23a is provided on the second window portion 24b.
appears, and allows or prevents loading of the cartridge 10 as described above.

Therefore, in such a configuration, despite the simple configuration, when loading the cartridge into the camera, the engaging means of the cartridge 10 can be used to determine whether the film is unused, partially taken out, or has been used. By selectively switching between the engaged and disengaged states depending on the situation, it is possible to reliably prevent the reloading operation of the used film cartridge 10, thereby reliably preventing the problem of double exposure. be able to.

Here, in the embodiment described above, the engagement between the fork 52 and the key 15a on the spool 11 side is by a "-" shape as in the conventional case, so engagement can be performed at positions rotated by 180 degrees. Therefore, it cannot be determined whether any of them will be engaged. In this embodiment, since the encoder 57 that controls the rotational stop position of the fork 52 is located on the camera side, in order to selectively stop the cartridge 10 at three locations in the rotational direction, it is necessary to stop the cartridge 10 not within a 360 degree range but within a 180 degree range. The display area is divided into three parts.

FIG. 12 is a simplified version of the fork encoder 57 in the embodiment described above, and in the camera 40B,
If the Patrone 10 loaded in the camera is unconditionally "
In this case, it is preferable to always control the spool 11 to the position r3 at the end of rewinding. A switch piece 60 that is turned on and off by the projection 52b is provided.
It is also possible to configure it with , which allows for significant simplification.

Figures 13 and 14 (a) and (b) show the fork 52.
A modified example is shown in which the engaging portion between the fork 52 and the spool 11 is divided into three display areas within a 360 degree range.
The shape of the engaging part is the same as that of the rotation transmitting part 61a and the erroneous engagement preventing part 61.
b, 61c, and the engaging portion 62 on the spool 11 side is shaped to match this shape, so that only one way of engagement is always possible within a 360 degree range. . And with this configuration,
Since 360 degrees can be divided into three parts, a large indication range can be obtained for the three display parts mentioned above, so the stopping accuracy of the spool 11 can be made rougher than in the above-mentioned embodiment, which is useful in practical use. The benefits are great.

In this embodiment, the case is shown in which the rotation transmission section 61a is provided in a state where it can rotate in both directions on the premise that the cartridge 10 is of a type in which the spool 11 is rotationally driven in both directions, but it goes without saying that the invention is not limited to this. stomach.

15(a) and 15(b), a photo sensor 63 is provided at a position corresponding to the window portion 24a or 24b constituting the loading prevention means at the bottom of the cartridge chamber 41, etc. A case is shown in which movement is detected and identified and the fork 52 is controlled to stop. Of course, any configuration may be used as long as the movement of the spool 11 can be detected by the sensor 63 using a configuration substantially similar to this. In this case, since the movement of the spool 11 is directly detected to control the stop position, there is an advantage that it is not affected by the state of engagement between the fork 52 and the spool 11.

In these two embodiments, the locking protrusions 16b of the ring 16 may be provided at three locations in the circumferential direction.

Figures 16 to 20 show a second embodiment of the present invention, and in these figures, parts that are the same as or correspond to those of the first embodiment described above are given the same numbers and their explanations will be omitted. .

Now, in this embodiment, as a means for restraining the spool 11 at a predetermined rotation stop position, a locking spring means 80 formed in an arc shape is used, and both ends 80a and 80b thereof are provided in the case 12.13. It is supported by being engaged with the locking grooves 81a and 81b, and a locking protrusion 16 is provided inside the central portion thereof.
b (In this embodiment, it is provided integrally with the spool 11)
A claw portion 80c that engages with is provided. Further, as means for releasing the spring means 80 when loading the cartridge 10 into the cartridge chamber 41, a second spring means also functions as a blocking means for preventing loading the cartridge 10 into the cartridge chamber 41 when the cartridge 10 is in a used state. 1 loading prevention lever 8
2 is used. Note that this lever 82 is attached to a support shaft 82a.
The distal end portion 82c is normally biased in the centripetal direction by a spring 82b, and is supported by being engaged with a groove 82d bored in the bottom of the chamber 41. ing. Further, in FIG. 16, in the case of the camera 40B, it is preferable to provide a second loading prevention lever 83 integrally erected at the bottom of the cartridge chamber 41.

Furthermore, in this embodiment, a non-protruding part 84a and a protruding part 84b are provided on the spool 11 side instead of the engagement surface part formed by a slope and a non-slope. and.

According to such a configuration, the film usage status display is r1
], "2J, r3", the exposed state of the non-protruding part 84a and the protruding part 84b from the windows 24a and 24b in each state is as shown in Table 1 below. become.

On the other hand, the distal end portion 82c of the first loading prevention lever 82, which faces into the window portion 24a when loading the cartridge so as to engage with the non-protruding portion 84a or the protruding portion 84b, is provided with a tip portion 82c that engages with the protruding portion 84b when the cartridge 10 is taken out. engage and lever 82
The sides swing to form a slope for escape.

According to such a configuration, FIGS. 17 to 1
As is clear from FIG. 9, it will be easily understood that substantially the same effects as those of the embodiment described above are achieved.

FIGS. 21 to 27 show a third embodiment of the present invention, and the same or corresponding parts as in each of the above-described embodiments are given the same reference numerals, and the explanation thereof will be omitted.

In this embodiment, in the structure of the above-described embodiment, the engaging means for preventing the cartridge 10 from being loaded into the camera after the start of film use and the means for preventing the loading are improved.

That is, in the first embodiment (FIGS. 1 to 11) and the second embodiment (FIGS. 16 to 20) described above, the camera 4
At 0A, the loading prevention bin 44 or the loading prevention lever 82 is used to prevent loading of the cartridge 10 in the "3" state.
, in other words, it is only necessary to provide one loading prevention means, whereas
In camera 40B, r2. , r3. In order to prevent the cartridge 10 from being loaded in this state, the loading prevention bin 44° 4
5 or loading prevention levers 82 and 8B, that is, two loading prevention means must be provided, which increases the number of parts.
The configuration of the camera was disadvantageous. Therefore, in this embodiment, the structure of the first embodiment described above is improved, and the camera 40B is
With only one loading prevention means in I2. , r3. It is possible to prevent loading of the cartridge 10 in this state.

The differences between the cartridge 10 in this embodiment and the first embodiment will be explained based on FIGS. 21 and 22 (corresponding to FIGS. 6 and 7 in the first embodiment).

That is, as shown in FIG. 21, the case 13 is provided with only one window 24a. On the other hand, the engaging surface portion 2
3 is composed of a radially continuous slope 23c, a non-slope 23e, a radially outer slope 23d, and a radially continuous non-slope 23f, as shown in FIG. There is. This is R1, R2 in FIG.
, 23, 24, and 25, which are cross-sectional at R3.

Note that FIG. 21 described above shows the case where the cartridge 10 is in the state [1].

In each state of the cartridge 1° with such a configuration, the engaging surface portion 23 exposed from the window portion 24a is as shown in Table 2 below.

Table 2 Next, the loading prevention means provided in the cartridge chambers 41 of the cameras 40A and 40B of this embodiment will be explained with reference to FIGS. 26 and 27.

That is, the camera 4 is located within the wall surface of the portion through which the window portion 24a passes when the cartridge 10 is loaded into the cartridge chamber 41.
0A is provided with a blocking lever 91, and camera 40B is provided with a blocking lever 92, both of which are rotatably supported by a fixed bin 93 and rotated clockwise in the figure by a spring 99 hooked to another bin 97. It is given mobility and its rotation is restricted by a restriction bin 95. A short locking protrusion 91a and a long locking protrusion 92a projecting into the cartridge chamber 41 are formed on the lower end sides of both levers 91 and 92, respectively. Each of these locking protrusions 9
To further explain the amount of protrusion of 1a and 92a, the second
As shown in FIGS. 6 and 27, when the cartridge 10 is loaded in state "2", that is, with the non-slanted surface 23e and the sloped surface 23d exposed from the window 24a, the blocking lever 91 of the camera 40A is locked. The respective protrusion amounts are determined so that the protrusion 91a contacts only the slope 23d, and the locking protrusion 92a of the blocking lever 92 of the camera 40B extends to and engages with the non-slope 23e.

Patrone 10 and cameras 40A and 4 in this embodiment
Since the 0B is configured as described above, when attempting to load the cartridge 10 in each state, it operates as follows.

That is, in state "1", the slope 23c is twisted from the window portion 24a.
When using Patrone 10 with the camera 40A exposed,
, 40B's locking protrusions 91a, 9 of the blocking levers 91,92
2a comes into contact with the slope 23c, so when the cartridge 10 is loaded, the blocking lever 91.92 is rotated to the right against the bias of the spring 99 by the action of the slope 23c, and the cameras 40A, 4
Loading of the cartridge 10 is allowed in either 0B.

In the case of the camera 40A, the locking protrusion 91a of the blocking lever 91 is
is in contact with the slope 23d, so the blocking lever 91 is in contact with the slope 23d.
The cartridge 10 is rotated to the right against the bias of the spring 99 by the action of d, and loading of the cartridge 10 is permitted. On the other hand, in the case of the camera 40B, the locking protrusion 92a of the blocking lever 92 is connected to the non-slanted surface 23.
e, and loading of the cartridge 10 is prevented.

Furthermore, state "3", that is, from the window portion 24a to the non-slanted surface 23f.
When using Patrone 10 with the camera 40A exposed,
, 40B's locking protrusions 91a, 9 of the blocking levers 91, 92
2a engages with the non-slanted surface 23f, so the cameras 40A, 4
In either case 0B, loading of the cartridge 10 is prevented.

As described above, in this embodiment structure, the cameras 40A, 4
Regardless of the type of 0B, it is possible to obtain the same cartridge loading prevention effect as in the above-mentioned embodiments 1.2 by providing only one loading prevention means, which is advantageous in terms of the configuration of the camera.

Note that here, although a blocking lever is used as a means for blocking loading on the cameras 40A and 40B, the present invention is not limited to this.
As in the embodiment, a retractable protruding loading blocking bin is provided which is biased by a spring, and its protruding amount is adjusted to correspond to the protruding amount of the locking protrusions 91a and 92a of the blocking lever 91,92.
It goes without saying that the length may be short for 0A and long for camera 40B.

Figures 2f3 to 30 show a fourth embodiment of the present invention, in which the structure of the first embodiment is improved by a method different from that of the third embodiment described above. This figure shows a case in which each of the cameras 40A and 40B is provided with one loading prevention means to obtain the same loading prevention effect as in the 1.2 embodiment.

The differences between the cartridge 10 in this embodiment and the first embodiment will be explained with reference to FIGS. 28 to 30. That is, in the first embodiment described above, as shown in FIG. 1, about half of the periphery of the upper end surface of the cartridge 10 is divided into three parts, each of which is divided into three parts.

In this example, the areas are "2" and '3J.
Approximately half of the periphery of the upper end surface of the cartridge 10 is divided into four areas, and three of the areas are designated as "1".

r2. , r3. area, and the remaining area is not used. Note that the function of the key 15 as an instruction means is the same as in the first embodiment.

On the other hand, below the case 13, as shown in FIG. 29, window portions 24a and 24b are provided at an angle of approximately 45 degrees apart, and the engagement surface portion 23 is provided with an angle of approximately 90 degrees as shown in FIG.
A slope 23g and a non-slope 23h are provided for each degree, and the shapes of both are similar to the slope 23a and the non-slope 23b of the first embodiment, respectively.

Further, the locking protrusions 16c and 16d of the ring 16, which prevent the indicated position from shifting when the cartridge 10 is in full form, are arranged between the three areas in FIG. It is placed in a position to restrain it from turning.

In such a configuration, the engaging surface portion 23 exposed from the windows 24a and 24b in each state of the cartridge 10 is
will be in a state as shown in Table 3 below.

Table 3 Here, the above-mentioned FIG. 29 shows the state shown in "1".

Further, on the camera 40A, 40B side, a fork encoder 57 that controls the rotation stop position of the fork 52 at the end of rewinding is configured to control the spool 11 to stop in the three areas where the spool 11 should be stopped. This differs from the first embodiment only in the angular position of the segment pattern 57c (see FIG. 2 described above), and its illustration is omitted. Regarding the loading prevention bin that prevents loading of the cartridge 10, in the case of the camera 40A, when loading the cartridge 10 in the cartridge chamber 41, the window part 2
A loading prevention bin 44 is provided at a portion through which the bar 4a passes, and is biased by a spring 44a.

On the other hand, in the case of the camera 40B, only the loading prevention bin 45 is provided in the portion through which the window portion 24b passes, and is biased by a spring 45a (see FIG. 10 described above).

Patrone 10 and cameras 40A and 40B in this embodiment
is configured as described above, and when an attempt is made to load the cartridge 10 in each state, it operates as follows.

That is, in the patrone 10 in the state "1",
Loading of cartridge 10 is allowed in either camera 40A or 40B.

In addition, in the cartridge in state "2", camera 4
In the case of 0A, loading is allowed, and in the case of camera 40B, loading is prohibited.

Further, in the cartridge 10 in the state B "3", loading of both the cameras 4OA and 40B is prevented.

In such an embodiment structure, the cameras 40A, 4
Both of the 0Bs have the advantage that by providing only one loading prevention means, it is possible to obtain the same cartridge loading prevention effect as in the first and second embodiments described above, which is advantageous in terms of the camera configuration.

FIGS. 31 to 33 show a fifth embodiment of the present invention, and this embodiment has the structure of the fourth embodiment described above,
Applying the configuration in which the spool 11 and the fork 52 are always engaged only in one way within a 360 degree range shown in FIGS. 13 and 14, r14. The angles assigned to each area of '2J, r3' are increased.

To explain the difference between this embodiment and the fourth embodiment of the cartridge 10, as shown in FIG. 1".

r2. , r3'', and the remaining area is not used.

Further, as an instruction means, an arrow 62 is attached to the upper engaging portion 62.
A is provided. On the other hand, as shown in FIG. 32, the case 13 is provided with window portions 24a and 24b separated by approximately 90 degrees, and the engagement surface portion 23 is provided with a slope 23j and a slope 23j as shown in FIG. Non-slope 23k is provided in half,
The shapes of these two surfaces are respectively similar to the sloped surface 23a and the non-slanted surface 23b of the first embodiment. On the other hand, the locking protrusion 16 of the ring 16 prevents the indicated position from shifting when the cartridge 1o is used alone.
As shown in FIG. 33, e and 16f represent the spool 1 between the three areas in FIG. 31 when the cartridge is alone.
1 is placed in a position to restrain it from turning.

Therefore, in each state of the cartridge 10, the window 2
The engagement surface portions 23 exposed from 4a and 24b are as shown in Table 4 below.

Table 4 Here, the above-mentioned FIG. 32 shows the state of "1".

Further, in the cameras 40A and 40B, the fork encoder 57 that controls the rotation stop position of the fork 52 at the end of rewinding is configured to control the spool 11 to stop in the three areas where the spool 11 should be stopped. The only difference from the first embodiment is the angular position of the pattern 57C (see FIG. 2 described above), so illustration thereof is omitted.

As for the loading prevention bin that prevents loading of the cartridge 10, in the case of the camera 40A, a loading prevention bin 44 is provided in the portion of the cartridge chamber 41 through which the window 24a passes when loading the cartridge 10, as in the fourth embodiment. Spring 44a
It is energized and installed. On the other hand, in the case of the camera 40B, only the loading prevention bin 45 is provided in the portion through which the window portion 24b passes, and is biased by a spring 45a.

The cartridge 10 and camera 40A in this embodiment
, 40B are configured as described above, so that they operate in exactly the same manner as the fourth embodiment described above,
2. , r3. Since the angle of each region can be made larger than that of the fourth embodiment, the stop position control of the spool 11 at the end of rewinding can be performed roughly, which is advantageous.

Here, in the fourth and fifth embodiments described above, the camera 4OA,
Although a bottle is used as the loading prevention means on the 40B side, it goes without saying that a lever like the one in the third embodiment described above may also be used.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part, including the format of the cartridge 10, may be modified and changed as appropriate, and various modifications may be made. . For example, in the above-described embodiment, the present invention is applied to a special type of film cartridge 10 in which the film can be fed out and rewound by rotating the spool, and the cameras 40A and 40B loaded with the same. The present invention is not limited to the above, and can be applied to even a 35 mm roll film cartridge with the same effect. Further, in the above-mentioned embodiment, a case was explained in which there were three types of identification indications (14a, 14b, 14c) for the usage state of the film, but the present invention is not limited to this.
It is only necessary to configure the device so that at least two types of identification display (indication of whether it is unused or used) can be performed.

〔Effect of the invention〕

As explained above, according to the present invention, at least two display sections are formed on the outer surface of the film cartridge to display the usage status of the film, and the display section rotates in accordance with the movement of the spool around which the film is wound. Further, there is provided an indicating means for indicating the film usage status by indicating one of the display sections according to the rotation stop position, and further means for restraining the movement of the spool having the indicating means at times other than when loading the camera. While selectively providing
The camera into which this film cartridge is loaded is equipped with a spool drive device that rotates the spool of the cartridge, and a control device that controls the position at which this drive device stops rotating the spool depending on the state of use of the film. Despite the structure, it is possible to reliably display the usage status of the film in the cartridge, such as unused, partially removed, used (photographed), etc., and to simply check the outer surface of the cartridge. Not only is it extremely easy to identify and allows proper film management, but it also has various advantages such as being able to eliminate the conventional problems of loading used cartridges into the camera and creating double exposures. It has a positive effect. In particular, according to the present invention, the desired effect can be achieved with the existing configuration of using a cartridge spool as a display means and a camera rewind drive system as a drive means, and no special configuration is required. There is an advantage. Of course, in the cartridge alone, the rotation of the spool can be restricted by restraint means provided as necessary, so there is no risk of the spool rotating and displaying an incorrect state. Furthermore, since such instruction display is achieved automatically by mechanical means on the cartridge and camera side, the operator does not need to perform any special operations.

Further, according to the present invention, a part of the outer part of the film cartridge is in one of two states, ie, engaged and disengaged, depending on the state of use of the film, and allows or prevents loading of the film cartridge into the camera. The camera in which this cartridge is loaded is provided with an engaging means for changing the engaging means in the cartridge into an engaged state or a disengaged state depending on the state of use of the film, and a means for changing the engaging means in the cartridge into an engaged state or a disengaged state depending on the state of use of the film, The structure includes means for allowing the cartridge to be loaded into the cartridge chamber when the cartridge is in the engaged state, and a means for preventing loading the cartridge into the cartridge chamber when the cartridge is in the engaged state. figure,
When the cartridge is loaded into the camera, the engaging means of the cartridge is selectively switched between an engaged state and a disengaged state depending on whether the film is unused, taken out midway, or used. This makes it possible to reliably prevent the operation of reloading a used film cartridge, and has various excellent effects such as being able to reliably prevent the problem of double exposure.

[Brief explanation of drawings]

FIGS. 1(a), (b), and (c) are schematic plan views for explaining the film usage status display function of a first embodiment of the film cartridge according to the present invention, and FIG. 2 shows the film cartridge and camera. FIG. 3 is a schematic exploded perspective view showing the cartridge and part of the cartridge chamber on the camera side; FIGS. 4 and 5 are longitudinal sectional views of the cartridge. and a sectional view of the main part from another direction (cross-sectional view of line ■-■ and line V-V in Fig. 6),
The figure and Fig. 7 are the VI-VI line in Fig. 4, ■-■
! 8 is a block diagram showing the spool drive device and its control device on the camera side, FIG. 9 is a flowchart showing the procedure for determining the usage status of the film, and FIG. 10 is a sectional view.
The figures are schematic exploded perspective views showing the cartridge in various states and the loading prevention means in two types of cameras;
b) is a schematic diagram for explaining the function of the loading prevention means, FIG. 12 is a schematic perspective view showing a simplified modification of the fork encoder, and FIGS. 13 and 14 (a) and (b) are fork encoders. A schematic exploded perspective view showing a modified example of the engagement structure for the spool and a diagram for explaining the engagement state, 1st
5(a) and 5(b) are diagrams showing a modified example for detecting the spool position and controlling the stop, FIG. 16 is a schematic exploded perspective view showing the second embodiment of the present invention, and FIG. 17 is its Schematic longitudinal cross-sectional view (Q-Q line cross-sectional view in Figure 20), Figure 18, and Figure 1
FIG. 9 is a schematic vertical sectional view for explaining its operating state, FIG. 20 is a sectional view taken along line P-p in FIG. 17, and FIGS. Schematic diagrams corresponding to FIGS. 6 and 7, and FIGS. 23 to 25 are schematic diagrams corresponding to FIGS.
R1-R1 line, R2-R2m, R3-R3 in Figure 2
26 and 27 are cross-sectional views of main parts showing the loading prevention means of the cartridge and its operating state, and FIGS. 28(a) and 28(b).
, (c) is a schematic plan view of a film cartridge for explaining the film usage state display function showing the fourth embodiment of the present invention, and FIGS. 29 and 30 are the above-mentioned sixth embodiment Schematic diagram corresponding to Fig. 7 and Fig. 31
Figures (a), (b), (c) to 33 are schematic plan views of a cartridge illustrating the film usage status display function of the fifth embodiment of the present invention, and the above-mentioned figures 6 and 7. FIG. 2 is a corresponding schematic diagram. 10...Film cartridge, 11...Spool, 14a, 14b, 14c-=identification display symbol, 15...-key (instruction means), 16...ring, ], 6b- ---Latching protrusion, 16c, 16d, 1
6e. 16f...-Latching protrusion, 17...Latching ring, 17a...
...-Claw portion, 23a...Slope, 23b...Non-slope, 23c, 23d, 23g, 23j-Slope, 23e,
23f, 23h, 23..., non-slope, 24a. 24b--Window, 40A, 40B--Camera, 4
1...Patrone room, 42...-Restriction release bin,
44.45...Loading prevention bin, 50...Spool drive device, 51--Control device, 52--Fork, 62--Engagement portion, 62a...-Instruction means , 8
0...Circular spring means, 82...Loading blocking lever having a restriction release function, 83...-Second loading blocking lever, 91.92...Blocking lever

Claims (5)

[Claims] (1) In a film cartridge in which film is stored by winding it around a spool, at least two display portions are formed on the outer surface of the cartridge to display the usage status of the film in the cartridge, and according to the movement of the spool, 1. A film cartridge, characterized in that a film cartridge is provided with an indicating means for displaying a film usage status by indicating one of the display sections according to a rotating stop position of the spool. (2) The film cartridge according to claim 1, further comprising means for restraining deviation of the indicated position by the indicating means at times other than when loading the camera. (3) A camera loaded with a film cartridge according to claim 1, comprising: a spool drive device for rotationally driving the spool of the film cartridge; and a position at which the rotation of the spool is stopped by the drive device is controlled according to the usage state of the film. A camera comprising a control device. (4) In a film cartridge in which film is stored by winding it around a spool, a part of the outer part of the cartridge can be in one of two states, engaged or disengaged, depending on the state of use of the film. A film cartridge characterized in that it is provided with an engaging means for allowing or preventing loading of the film into a camera. (5) A camera loaded with a film cartridge according to claim 4, further comprising means for changing the engaging means of the cartridge into an engaged state or a disengaged state depending on the state of use of the film, and a means for changing the engaging means of the cartridge into an engaged state or a disengaged state depending on the usage state of the film, The camera is characterized in that it is provided with means for allowing loading of the cartridge into the cartridge chamber when the camera is in the engaged state, and for preventing loading of the cartridge into the cartridge chamber when the camera is in the engaged state.