JPH036545A - Film cartridge loading mechanism - Google Patents

Abstract

PURPOSE:To effectively cut off light which enters a camera from a transparent window with a small number of parts by composing the mechanism of a projection part which is formed at the part where the display of a film cartridge is provided and a recessed which engages and disengages from the projection part as a cartridge chamber lid is opened and closed. CONSTITUTION:A light shield material 75 made of 'Moltopren(R)' is stuck inside a rear lid 2 while surrounding the transparent window 72 and when the rear lid 2 is closed, this light shield material 75 comes into elastic contact with the bottom lid 32 of the film cartridge 1. Further, a projection annular step part 76 which surrounds the periphery of a film spool 34 is formed on the bottom lid 32 of the film cartridge 1 and a recessed annular step part 77 which engages the projection annular step part 76 is formed at the periphery of the transparent window 72 on the inside surface of the rear lid 2. Therefore, when the film cartridge 1 is loaded and the rear lid 2 is closed, both the step parts 76 and 77 engage each other to bend the travel path of light. Consequently, a light leak is eliminated and the number of parts is decreased.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a film cartridge loading mechanism for a camera.

[Conventional technology]

The mainstream film used in current cameras is 35mm cartridge roll film with a standard called 135 film, and most cameras' film winding mechanisms are compatible with 135 film. be.

[Problem to be solved by the invention]

A common problem when using 135 film is that the initial loading operation when loading the film into the camera is complicated. It has been developed many times in the past. In the present invention, in order to simplify the handling operation when loading film, we have developed a comprehensive film loading system for film and camera that can omit the initial loading operation. developed a cartridge-type film in which the cartridge is loaded into the camera along the axis of the filmstrip, and a camera-side loading mechanism suitable for loading the cartridge. In this system, in order to clearly indicate whether or not a film cartridge is loaded in the camera, a transparent window is provided on the cartridge chamber cover, and a display is provided on the film cartridge at a position that can be seen through the transparent window. It consists of Therefore, a light-shielding mechanism is required at the periphery of the transparent window between it and the film cartridge. The present invention has been devised in view of the above-mentioned technical problems and to effectively solve them. Therefore, an object of the present invention is to provide a film loading system using a newly developed film cartridge, in which the presence or absence of a film cartridge in the camera is displayed through a transparent window. To provide a film cartridge loading mechanism capable of effectively blocking light with a small number of parts.

[Means to solve the problem]

The film cartridge loading mechanism according to the present invention provides an indication on the surface of the film cartridge in which the film is wound in the housing to indicate that the film cartridge is loaded in the camera, and also provides a display in the cartridge chamber of the cartridge chamber. A film cartridge loading mechanism is provided in which the lid is provided with a transparent window corresponding to the position indicated above, and a light shielding means is formed at the peripheral edge of the transparent window by cooperation of the film cartridge and the cartridge chamber cover,
The light shielding means is formed on a convex portion formed at a location of the film cartridge where the display is provided and on a peripheral edge of the transparent window of the cartridge chamber lid, and is formed on the convex portion as the cartridge chamber lid is opened and closed. It is composed of a recessed part that is detachably fitted into the recessed part.

[Action and effect of the invention]

In the film cartridge loading mechanism according to the present invention, when the cartridge chamber cover is closed with the film cartridge loaded, the protrusion of the film cartridge fits into the recess of the cartridge chamber cover. Therefore, in this state, light that can enter the camera through the transparent window is blocked by the fitting between the recess and the projection, and therefore does not enter into the interior of the camera other than the upper end surface of the projection where the display is provided. The light-shielding effect of this configuration is that there is no risk of functional deterioration due to changes over time compared to installing a conventionally commonly used elastic light-shielding member such as maltbrene in the gap, and there is no elastic deformation of the light-shielding member. Since both can be shielded from light, the possibility of light leakage due to variations in the amount of deformation (amount of compression) can also be eliminated. It can also contribute to reducing the number of parts. Embodiment 1 A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 26. FIG. 1 shows the structure of the film cartridge and its loading mechanism in this embodiment in an exploded perspective view with the film cartridge 1 unloaded and the back cover 2 open. First, in the loading mechanism shown at the top of the figure,
The back M2 constitutes a part of the bottom surface of the casing (not shown) of the camera body, and by swinging around the rotation axis 4, the back M2 opens a space for loading the film cartridge 1 into the camera body, that is, a cartridge chamber 3. Open and close. In the figure, 5 is a back cover release knob. This knob 5 is held and guided by a casing (not shown) and is slidable in the vertical direction in the figure, and is exposed to the outside of the camera so that it can be operated from outside the casing. Further, it is urged upward in the sliding direction by a spring 6. A back cover locking lever 8 that is rotatable around a shaft 7 is in contact with the lower end of the back cover release knob 5 located at the upper end position. Push one end of the stop lever 8 and rotate the lever 8 around the shaft 7 in the counterclockwise direction in the figure. When the lever 8 rotates counterclockwise, the engagement between one end of the lever 8 and the lock pawl 10 of the back cover 2 is released, allowing the back cover 2 to swing freely. still,
The lever 8 itself is biased by a spring 9 to pivot around the shaft 7 in the clockwise direction in the figure. Therefore, when the back cover release knob 5 is at the top position of its movement range, one end of the lever 8 comes into contact with the lower end of the back cover release knob 5, as shown in the figure, while the other end touches the bottom of the back cover release knob 5 in the closed position. It engages with the lock claw 10 of the lid 2 to lock and hold the back lid 2 in the closed position. In the figure, 11 is an eject lever. The eject lever 11 is configured to push the film cartridge 1 out of the cartridge chamber 3 from the loaded state in the cartridge chamber 3 by opening the back M2, and is held and guided by the above-mentioned casing (not shown) or the like. The film cartridge 1 can be slid upwardly and downwardly in the figure, and is biased downwardly by a spring 12, that is, in the direction in which the film cartridge 1 is pushed out. The bent portion 11a at the upper end contacts the upper bottom surface 1a of the loaded film cartridge 1, and when the film cartridge 1 is loaded, the bent portion 11a
receives a pushing force from the film cartridge 1, and conversely, this bent portion Lla pushes out the film cartridge 1 at the time of ejection. A claw 1 is provided on the side of the eject lever 11 and protrudes laterally.
1b is formed. On the other hand, an arm 5a that protrudes laterally is also formed on the side of the back cover opening knob 5, and between these claws 11b and the arm 5a it is possible to swing around a shaft 13 in the center. A locking lever 14 in the shape of a square is interposed. When the back cover release knob 5 is pushed down from the state shown in FIG.
2 opens, one end of the locking lever 14 is pushed by the arm 5a, the locking lever 14 rotates clockwise around the shaft 13, and the pawl 11b of the eject lever 11 engages with the locking lever 14. The eject lever 1 will also be released.
1 is moved downward by the biasing force of spring 12. At this time, if the film cartridge 1 is loaded in the cartridge chamber 3, it is pushed out from the cartridge chamber 3. When the engagement between the pawl 11b of the eject lever 11 and the locking lever 14 is released, the pawl 11b is located below the locking lever 14 in the figure. This state is also a state in which the film cartridge 1 is prepared so to speak for loading, and when the film cartridge 1 is loaded, the upper bottom surface 1a of the film cartridge 1 is inserted into the bent portion 11 of the eject lever 11.
a is pushed up, and along with this movement, the pawl 11b also pushes the locking lever 14 away and moves upward to the locking lever 14. The upper part of the claw 11b is connected to the locking lever 14 when performing this operation.
It is formed into a slope lie so as to be convenient for displacing. The locking lever 14 is urged by a spring 22 to rotate counterclockwise in the figure, and when the claw 11b or the locking lever 14 is pushed away and overcome when loading the film cartridge 1, the locking lever 14 is turned again. 14 is claw 11
b to hold the eject lever 11 in the state shown in FIG. In the figure, 15 is a shutter actuation lever. The shutter referred to here is a light-shielding shutter as a light-shielding lid provided on the film cartridge I, which will be described later. This shutter actuating lever 15 is biased downward by a spring 17 and is slidable in the vertical direction in the figure as the back M2 is opened and closed. That is, when the back cover 2 is closed, the protrusion 1 formed on the back cover 2
When the back cover 2 is opened, the protrusion 16 is released from contact with the protrusion 16 and pulled downward by the biasing force of the spring 17. An inclined portion 15a is formed at the upper end of the lever 15. As shown in FIG. This inclined portion 15a has
One end of a second shutter actuating lever 18 that is rotatable around a rotation center 19 is in contact with the second lever 18 . The second lever 18 is
Further, the other end is locked to one end of a tension spring 20, and is constantly urged to rotate clockwise in the figure. Therefore, as the first lever 15 moves up and down, it is configured to be able to swing while being guided by the inclined portion 15a thereof. On the other hand, the upper bottom surface 1 of the film cartridge 1
A is provided with a light-shielding shutter drive section 1b. The second lever 18 is formed with a yutter actuating pin 21 that engages with the light-shielding shutter drive section 1b when the film cartridge 1 is loaded in the cartridge chamber 3. The shutter actuation pin 21 is connected to the second lever 1
8 rotates around the rotation center 19 and acts on the light-shielding shutter driving section 1b to open and close the light-shielding shutter (shown in FIG. 2). FIG. 2 is an exploded perspective view showing the internal structure of the film cartridge 1 in this embodiment. As a whole, a cartridge housing is constituted by a top cover 31, a bottom cover 32, and a body 33, and a film spool 34 is provided inside the cartridge housing.
．． Film sprocket 35. Light-shielding shutter 36
is built-in. FIG. 3 is a plan view of the assembled film cartridge 1 with the top cover 31 removed. fuselage 3
3 is a large room 37 that stores the film spool 34;
and a small room 38 that houses a film sprocket 35 and a light-shielding shutter 36. A film outlet 39 is formed in the small chamber 38, and the perforations (not shown) of the roll film 40 wound on the film spool 34 are engaged with the film sprocket 35, and the film 40 is driven by the sprocket 35. The film is sent out from the film outlet 39. FIG. 4 is a longitudinal sectional view taken along a polygonal line through the respective rotational axes of the film spool 34 and film sprocket 35 of the assembled film cartridge 1. The film spool 34 and the film sprocket 35 are rotatably held at both upper and lower ends by the upper M3I and the bottom cover 32. This film spool 34
The film sprocket 35 is rotated by engaging with the spool fork and sprocket fork on the camera side, respectively, and the tips of these engaging parts 34a and 35b are rounded so that the cross-sectional shape is semicircular. Even if these forks and the engaging parts 34a, 35b come into contact with each other at their tips when loading the film cartridge 1, the engaging parts 34a, 35b will rotate and escape, so that the fork will not be completely removed. An engagement is made. Furthermore, as shown by the dashed line in FIG. 24, if the tip of the camera-side fork 91 is also rounded, either or both of the fork 91 and the cartridge-side engaging portions 34a and 35b will rotate and escape. This ensures complete engagement. Therefore, a space for retracting the fork and a fork biasing spring are not required, which contributes to a reduction in the number of parts, compactness, and cost reduction. Also, Fig. 4. If the engaging portion 34a is configured in the shape of a single letter as in the film spool 34 shown in FIG.
However, as shown in Figs. If the fork engaging portion is formed by the radially inward protruding portions 34a° arranged equally on the inner circumferential wall of the The rigidity and the rigidity of the mold for molding the fork are also increased, and furthermore, the film spool 34 is less likely to be damaged because it receives rotational force from the plurality of protrusions 34a'. Also, the rotation of the films boules 34 itself becomes smooth. The light-shielding shutter 36 has arms 3 at two locations above and below.
6a and 36b are provided in a protruding manner, and each tip is formed into an annular portion. Rotating shaft 35a of sprocket 35
The annular portions of the arms 36a and 36b of the light-shielding shutter 36 are fitted in the shading shutter 36, and the light-shielding shutter 36 swings around this rotating shaft 35a to close the film outlet 39 of the body 33.
Open and close. A spring 41 as shown in FIG. 2 is interposed between the lower arm 36b of the light-shielding shutter 36 and the bottom cover 32, and constantly biases the light-shielding shutter 36 in the closing direction of the film outlet 39. ing. Furthermore, a recessed portion is formed in the upper part of the light-shielding shutter 36 as the above-mentioned light-shielding shutter driving section 1b, into which the shutter actuating bin 21 of the film cartridge loading mechanism can be engaged. Therefore, when the film cartridge 1 is loaded into the loading mechanism section with the light-shielding shutter 36 closed, the shutter operating bin 21 engages with the drive section 1b and rotates further, overcoming the biasing force of the spring 41. Light-shielding shutter 36
is rotated to automatically open the film outlet 39. In addition, 42 in the figure is a semiconductor memory board that is attached to the upper M31 and records film information and various shooting information (photographs completed in the film cartridge 1, number of frames), and 43 is a lid as a cover. It is the body. Patterned signal contacts 42a are arranged on the semiconductor memory substrate 42, and each contact is electrically connected to the semiconductor memory chip 42b. A used or unused determination signal is recorded on the semiconductor memory board 42, and when a film cartridge 1 with a used signal recorded is loaded, initial loading of the film is not performed in the camera body. The camera is controlled in such a way that double shooting can be prevented. Furthermore, a signal indicating the number of film sheets that have been shot is recorded, and if it is not 0, the number of film sheets that have been taken is the same number as 1. / to advance the film and set it so that you can start shooting from the beginning of the unused area. Therefore, even if the film in the film cartridge 1 is rewound and taken out before all of the film has been photographed, when the film cartridge 1 is used again to photograph, the unused portion can be automatically photographed. The TAB tape is used as it is for this semiconductor memory board 42. Therefore, mounting efficiency is improved, and since it is suitable for automatic assembly, reliability is also improved, and it is extremely convenient for mass production. In this way, with the film cartridge 1 of this embodiment, the film can be rewound even if all the frames of the film have not been photographed, and the film can be reused from the part that has not been photographed, so initial loading can be repeated. There must be. Therefore, the leading end of the rewound film is always kept in engagement with the film sprocket 35. Specifically, as shown in FIG. 2, a film stopper 44 is attached to the inner peripheral surface of the body 33 of the film cartridge 1. As shown in FIG. On the other hand, as shown in FIG. 5, the film 40 wound in the film cartridge 1 of this embodiment has a perforation 40a formed only on one side, and a stopper engagement hole 40b at the tip of the opposite side. is formed. The film stopper 44 can be engaged with and disengaged from the stopper engagement hole 40b, allowing movement of the film in the film feeding direction (arrow B direction in the figure) and in the film rewinding direction (arrow B direction in the figure). In order to restrict the movement of the film beyond the stopper engagement hole (6 directions), there is a protruding portion 44a consisting of a surface inclined to the film surface and a surface substantially perpendicular to the film surface. FIG. 6 shows the structure and operation of the film cartridge constructed as described above and the film feeding mechanism corresponding to its loading mechanism section. FIG. 6(a) shows the operating conditions during initial loading of the film, FIG. 6(b) shows the operating conditions during normal film winding, and FIG. 6(c) shows the operating conditions during film rewinding. A drive motor 51 is provided in a film take-up spool 52 on the camera side, and its driving force is transmitted to a planetary gear section 53 via a gear train of a reduction system. The planetary gear section 53 includes a first gear 53a whose rotation center is fixed, a second gear 53b that moves planetarily in the circumferential direction while meshing with the first gear 53a, and a second gear 53b that moves planetarily in the circumferential direction while meshing with the first gear 53a.
．． The arm lever 53c connects the second gears 53a and 53b and transmits the driving force of the planetary motion to the second gear 53b. A plunger lever 5 that reciprocates as an actuator is attached to one end of this arm lever 53c.
4 is engaged, and 55 is the main body of the plunger device. A cartridge spool fork 56 is provided at each position directly above the film spool 34 and film sprocket 35 of the film cartridge 1 loaded into the cartridge chamber.
The third gear 56a has a cartridge sprocket fork 57 on its rotating shaft, and the fourth gear 5 has a cartridge sprocket fork 57 on its rotating shaft.
7a are arranged apart from each other. Also, third gear 5
6a has a fifth gear disposed on the opposite side to the fourth gear 57a.
Gear 58 and sixth gear 59 mesh in sequence. The second gear 53b of the planetary gear portion 53 can planetically move and mesh with the fourth gear 57a and the sixth gear 59. The operation of the film feeding mechanism during initial loading is as shown in FIG. 53b is the fourth gear 57a
The film sprocket 35 is rotated counterclockwise in the figure through the fourth gear 57a and the cartridge sprocket fork 57. A film sprocket 35 engages with a perforation of the film wound around a film spool 34 in the film cartridge 1, and feeds the film out of a film outlet 39. Initial loading is performed by driving the film sprocket 35 to advance the film until it is wound around the film take-up spool 52. In this operation mode, the rotational speed of the drive motor 51 is slowed down to slow down the film feeding speed in order to prevent accidents such as perforation breakage. The operation of the film feeding mechanism during normal film winding is as shown in FIG. It comes to an intermediate position where it does not mesh with gear 59 either. Therefore, the driving force of the drive motor 51 is not transmitted to the film cartridge 1 side, and only the film take-up spool 52 is driven to take up the film 40. Next, the operation of the film feeding mechanism when rewinding the film is as shown in FIG.
As a result of the reverse rotation, the arm lever 53c of the planetary gear section 53 rotates clockwise, the second gear 53b meshes with the sixth gear 59, and the film spool 34 is connected to the film spool 34 via the fifth gear 58 and the third gear 56a. Gives clockwise rotation. The photographed film wound on the film take-up spool 52 is rewound onto the film spool 34 and stored in the film cartridge l. As means for detecting whether the film is reliably wound around the take-up spool 52 during initial loading, there are known methods such as mechanical detection and electrical detection, and it does not matter which sensor is used. If the winding is complete, the film is switched to the winding mode by driving the plunger device 55, and if the winding is incomplete, this is detected and the drive motor 51 is reversed to automatically rewind the film. . By doing this, it is possible to reliably prevent an accident in which a film is not wound around the take-up spool and the user takes a picture without noticing it, resulting in a failure in taking a picture. Although not shown, a frame number counting mechanism is attached to the fourth gear 57a. When applying the film cartridge and its loading system as described above, the film cartridge 1
is inserted from the bottom side of the camera during loading. In the film cartridge 1 of this embodiment, as shown in FIG. 7, a relatively conspicuous color display 71 is provided by pasting or printing a color sticker on the bottom surface of the film spool 34, which is the back M2 side of the camera, when loaded. administered. Therefore, on the one hand, by providing a transparent window 72 as shown in FIG. 8 on the back cover 2 of the camera, it is possible to easily determine from the outside of the camera whether or not the film cartridge 1 is loaded in the cartridge chamber 3. In addition, a pattern display 7 as shown in FIG.
If it is set to 1, the rotation of the film spool 34 can be seen, so the film advance can also be confirmed. Further, as shown in FIG. 10, for example, characters indicating information about the film may be displayed, and if these characters are displayed on the bottom of the film spool 34, it is of course possible to confirm the film advance. Such a configuration is extremely convenient for matching with the loading direction of the film cartridge 1. That is, if a display is provided on the side of the cartridge 1, as with conventional cartridges, there is a risk that the corners and edges of the cartridge may get caught in the maltblen material used for light shielding. The cartridge chamber 3 must be arranged so that it can be seen from the outside of the camera, which also poses design constraints. By the way, when providing the transparent window 72 on the back cover 2, there arises the problem of blocking light in that portion. In this embodiment, as shown in FIG. 16, a light shielding material 75 made of maltbrene is pasted on the inside of the back M2, surrounding the transparent window 72, and when the back cover 2 is closed, the film cartridge 1
This light shielding material 75 comes into elastic contact with the bottom lid 32 of the. In addition, as shown in FIG.
32 may be formed with a convex annular stepped portion 76 that surrounds the periphery of the films boules 34. In this case, as shown in FIG. 18, a concave annular step portion 77 that fits into the convex annular step portion 76 is formed around the transparent window 72 on the inner surface of the back M2. Therefore, when the film cartridge 1 is loaded and the back M2 is closed, the stepped portions 76 and 77 fit together, bending the light path, and blocking light from entering the cartridge chamber through the gap between them. do. It is also possible to provide an indication for determining the presence or absence of the film cartridge 1 as described above on the end face of the convex annular stepped portion 76. With this configuration, light can be blocked without using a light blocking material such as maltbrene, contributing to miniaturization and cost reduction. Furthermore, when maltbrene is used, there is a risk that the light shielding function will deteriorate due to changes in the material over time or uneven compression, but there is no such concern with the stepped structure. The film cartridge 1 of this embodiment is designed so that when the film cartridge 1 is removed from the camera after the film has been used halfway, it can be easily determined from the appearance whether the film is used or unused. has been done. That is, as shown in FIG. 11 or FIG. 12, the camera-side member easily inserts the film into the entrance of the engaging hole of at least one of the film spool and film sprocket, or into the contact window of the semiconductor memory at the loading position. A breakable seal 73 is attached. Therefore, −
Once the film cartridge 1 is loaded, this seal 7
3 is in a torn state as shown in FIGS. 13 and 14, so that it can be easily determined whether it is a used film or an unused film. In particular, by pasting the sticker 73 on the window of the contact of the semiconductor memory, it is possible to prevent the contact of the semiconductor memory from becoming dirty and improve reliability. The above-mentioned camera-side member that breaks the seal 73 is
In the case of the example shown in FIG. 11, the cartridge spool fork 56 and the cartridge sprocket fork 57
(both shown in FIG. 6), and in the case of the example shown in FIG.
This is a contact bin 74 as shown in the figure. The contact bottle 74 has a sharp tip so that contact can be made reliably through the seal 73. Semiconductor memory board 4
Since 2 is a flexible printed circuit board and is disposable, there is no problem in piercing it with the contact pin 74. Furthermore, since the contact pin 74 is located deep inside the cartridge chamber 3, there is no danger. Such a configuration does not require any special display mechanism, is reliable in operation, and can reduce the cost of the film cartridge 1 itself. In the above-mentioned embodiment, the sticker 73 is attached to a place where the film cartridge 1 is broken when it is loaded, so that it is possible to distinguish between used and unused film cartridges. It is also possible to affix a recording sticker or the like made of a heat-sensitive material or a pressure-sensitive material to a part of the film cartridge 1, and record it on the camera side using heat or pressure so that it can be identified. Figure 19(a)
, (b). (c) and (d) illustrate the locations where these recording stickers 78 are attached to the film cartridge 1. In this case, as shown in FIG. 20, a heat generating device or a pressure generating device is provided as a recording device 79 at a predetermined location in the cartridge chamber 3 on the camera side. The installation position is, of course, the position facing the recording sticker 78 when the film cartridge 1 is loaded. The heat generating device or pressure generating device may be one that generates pressure using a known thermal head, a spring means, or the like. Various display examples of records are shown in Figure 21 (a), (b), (c
), (d), and (e). (a) shows a case where a recording sticker 78 whose color changes with heat or pressure is used. (b) shows a case where characters can also be displayed using a thermal head. (c) shows a case in which the number of film shots or the number of remaining film sheets is displayed numerically in response to midway removal. (d) corresponds to multiple retrievals,
A case is shown in which the number of images taken so far is displayed by color change each time the image is taken out. (e) shows a case where the remaining number of sheets is displayed by color change and numbers, contrary to (d). In the above embodiment, a modification regarding the eject lever 11 will be described. When the film cartridge 1 is ejected from the cartridge chamber 3 by the eject lever 11 of the above embodiment, the film cartridge 1 is pushed out by the elastic force of the spring 12, but with such a configuration, the film cartridge l is ejected with considerable force. This may cause a surprise to the user. Therefore, as shown in FIG. 22, if a rack llc is formed on the eject lever 11 and the movement of the eject lever 11 is controlled by a governor 82 via a gear train 81 that meshes with this rack 11c, the film cartridge 11 can be moved.
is slowly pushed out. Governor 82 can also be replaced by other similar speed regulating mechanisms. Regarding the means for biasing the light-shielding shutter 36 in the closing direction, in the above embodiment, a spring 4I as shown in FIG. 2 was used as a separate member from the light-shielding shutter 36, but as shown in FIG. A molded spring portion 36c may be used as the biasing means. In such a spring structure,
Durability against repeated loads, temperature creep, etc. are likely to be problems, but the film cartridge 1 is not opened and closed repeatedly enough to cause problems, so reliability is sufficient.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the structure of the film cartridge and its loading mechanism in this embodiment, with the film cartridge unloaded and the back cover open. Fig. 2 is an exploded perspective view showing the internal structure of the film cartridge in this embodiment, Fig. 3 is a plan view showing the assembled film cartridge with the top cover removed, and Fig. 4 shows the film spool and the assembled film cartridge. FIG. 3 is a vertical cross-sectional view taken along a polygonal line through each rotational axis of the film sprocket. FIG. 5(a) is a diagram showing the relationship between the film and the film stopper in this embodiment when viewed from the film surface side, and FIG. 5(b) is a state in which the film stopper and the stopper engagement hole are engaged. FIG. 5(c) is a diagram showing a state in which the film stopper and the stopper engagement hole are disengaged, and FIG. 6(a) is a diagram showing the state in which the film stopper and the stopper engagement hole are disengaged. FIG. 6(b) is a perspective view showing the operating condition of the film feeding mechanism during film loading, and FIG.
Figure (c) is a perspective view showing the operating state of the film feeding mechanism of this embodiment during film rewinding. FIG. 7 is a diagram showing the presence/absence of a film cartridge in this embodiment, FIG. 8 is a perspective view showing the transparent window of the back cover of the camera in this embodiment, and FIGS. 9 and 10 are respectively for other embodiments. A diagram showing an indication of the presence or absence of a film cartridge in an example,
FIG. 11 is a diagram showing a sticker indicating whether a film cartridge is used or not in this embodiment, FIG. 12 is a diagram showing a sticker indicating whether a film cartridge is used or not in another embodiment, and FIG. 13 14 is a diagram showing a used state of the seal in FIG. 11, FIG. 14 is a diagram showing a used state of the seal in FIG. 12, and FIG. 15 is a diagram showing a situation in which a contact bottle breaks the seal in FIG. FIG. 16 is a sectional view showing the light shielding structure around the camera back in this embodiment, and FIG.
The figure is a perspective view showing the bottom surface of the bottom cover of a film cartridge with a light-shielding structure in another embodiment, FIG. 18 is a sectional view showing a light-shielding structure around the back cover in another embodiment, and FIG. Diagram showing where stickers can be pasted,
FIG. 20 is a diagram showing a recording sticker and a recording device for the recording sticker in this embodiment, FIG. 21 is a diagram showing a display mode of the recording sticker in this embodiment, and FIG. 22 is a film cartridge in another embodiment. FIG. 23 is a perspective view showing the light-shielding lid of a film cartridge in another embodiment; FIG. 24 is a fork engaging portion of the film spool of the film cartridge in this embodiment; 2nd cross-sectional view showing
FIG. 5 is a plan view showing a fork engaging portion of a film spool in another embodiment, and FIG. 26 is a sectional view showing the fork engaging portion of FIG. 25 and a corresponding camera-side fork. 1...Film cartridge, 2...Back cover as cartridge chamber cover, 3...Cartridge chamber, 31°3
2.33...Top cover, bottom cover, and body as film cartridge housings, 34...Film spool, 71...Display, 72...Transparent window, 76...
・Convex annular step part as a convex part of the light shielding means, 77...Concave annular step part as the four parts of the light shielding means Patent Applicant: Minolta Camera Co., Ltd. Representative Patent attorney Seishaku Ao (1 other person) No. 1 Figure 3 Figure 4 Figure 6 Figure 6 (0) R Figure 5 (0) 40 Figure 6 (b) Figure 6 (C) Figure 11 Figure 12111 Figure 13 Figure 14 Figure 15 Figure 22 Figure 1 Figure 23 Figure 17 Figure 16 (0) Figure 18 Figure 19 (b) Figure 2Q Figure 21 (e) Figure 25 Figure 24 Figure 26

Claims (1)

[Claims] (1) A display (71) on the surface of the film cartridge (1) with film wound inside the housing (31, 32, 33) indicating that the film cartridge (1) is loaded in the camera. At the same time, a transparent window (72) corresponding to the position of the display (71) is provided on the cartridge chamber lid (2) of the cartridge chamber (3), and the periphery of the transparent window (72) has the above-mentioned A film cartridge loading mechanism in which a light shielding means (76, 77) is formed by cooperation of a film cartridge (1) and a cartridge chamber cover (2), and the light shielding means (76, 77) is a film cartridge (1). ) is formed on the periphery of the transparent window (72) of the cartridge chamber lid (2). A film cartridge loading mechanism comprising a recess (77) that is detachably fitted into the projection (76) when opened and closed.