JPS6057831A - Film cartridge preventive of erroneous loading - Google Patents

Abstract

PURPOSE:To prevent erroneous loading by preventing an abutting member fitted to the inner wall of a cartridge loading part from abutting on and engaging the side wall of a film cartridge in a proper camera. CONSTITUTION:When a cartridge 1 is inserted into the loading part 20 of a proper camera, the pressure part 24 of the abutting member 22 is fallen down with an end surface 11 and an abutting pawl 23 rotates toward a back plate 4 to come into press contact. When the cartridge 1 is further inserted into the inner part of the loading part 20, the cartridge 1 is moved to the specific position where the end surface 1 contacts an inner wall 26 loaded normally. When the cartridge is inserted into the loading part 20'' of an improper camera, on the other hand, the cartridge 1 enters a recessed part 12 as it is inserted as mentioned above, and then abuts on the side wall 14. This side wall 14 is set where the cartridge 1 abuts on the abutting pawl 23 in the middle of the insertion, and the cartridge 1 is therefore disabled to be inserted into the normal position. Thus, the cartridge 1 is prevented from being used in the improper camera.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film cartridge that can be prevented from being erroneously loaded into a camera with an incompatible film type.

Self-processing photographic films used in so-called instant cameras, large sheet films, and the like are often stored in a holder and handled as a cartridge. As an example of a camera that uses such a film cartridge (hereinafter simply referred to as a cartridge), the cartridge loading section is formed into a bottomed cylindrical shape (generally a square cylindrical shape), and the cartridge is inserted from one end side. There are known devices that can be loaded with

On the other hand, especially in the above-mentioned instant cameras, in order to simplify the device, mechanisms such as the program shotter are often designed according to the sensitivity of the film being used, so Different films often cannot be given proper exposure. Additionally, cameras have been considered that are pre-equipped with filters for specific artificial light, and if such cameras are loaded with a daylight film cartridge, they may not be able to take proper pictures. .

Therefore, the above film cartridge cannot be loaded into a non-compliant camera, that is, a camera that uses film of a different type (sensitivity, spectral characteristics, etc. as mentioned above) from the film stored in the cartridge. This is preferable because misuse can be prevented.

Therefore, conventionally, in cartridges for instant cameras having a cylindrical cartridge loading section as described above, locking protrusions have been provided on the surface of the cartridge at different positions depending on the film sensitivity, and the projections have been attached to the inner circumferential wall of the cartridge loading section of non-compliant cameras. There has also been provided a cartridge in which the protrusion is engaged with a retaining claw to prevent loading, while the protrusion is not engaged with a retaining claw of a compatible camera so that the cartridge can be loaded normally.

However, since the above-mentioned cartridge has a locking protrusion protruding from the surface, it is naturally impossible to manufacture it using existing manufacturing and assembly equipment that was used to manufacture cartridges without a locking protrusion. It is not possible to manufacture using existing manufacturing and assembly equipment without making major modifications to the non-link mechanism and other equipment in the assembly department.

The present invention has been made in view of the above circumstances, and provides a cartridge with a function to prevent misloading, which can be manufactured using manufacturing and assembly equipment that previously manufactured cartridges without a function to prevent misloading. The purpose is to

As described above, the misloading prevention cartridge of the present invention is a film cartridge that is inserted and loaded into a cylindrical film cartridge loading section of a camera from one end side, and the cartridge faces the inner circumferential wall of the loading section when the cartridge is inserted. A recess is provided on the surface with a side wall facing toward the one end surface and perpendicular to the direction of insertion and loading, and the recess is provided with a side wall that is attached to the inner wall of the cartridge loading section of the non-conforming camera when inserted into the camera. The contact member enters this recess and comes into contact with the side wall during insertion, and the contact member attached to the inner wall of the cartridge loading section of the compatible camera does not come into contact with the side wall. A film cartridge that prevents misloading.

As described above, if a recess is provided on the surface of the cartridge and the abutting member comes into contact with the side wall of the recess, the outer shape of the cartridge protrudes outward compared to a cartridge that does not have a function to prevent incorrect loading. Therefore, the accidental loading prevention cartridge can be manufactured by using the same manufacturing and assembly equipment that manufactured cartridges without the accidental loading prevention function, or by using equipment that has been slightly modified. Manufacturable.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show a film cartridge for preventing misloading according to one embodiment of the present invention. As an example, the cartridge 1 of this embodiment includes a self-processing photographic film 2 used in an instant camera as described above, and a case 3.
It is made by storing multiple sheets inside. As shown in FIG. 1, the film 2 is pressed toward the top plate 6 by levers 5 of the plate supported on the inner surface of the back plate 4 of the case 3.
The lower exposure space provided in the is closed by a light shielding plate 8, and the film drawer opening 9 through which the exposed film 2 is drawn out is also closed by a light shielding tape 10 (these light shielding plates 8 and light shielding tapes 10 are After the cartridge 1 is properly loaded, it is removed by the mechanism on the camera side).

The cartridge 1 is loaded into the cartridge loading section 20 of a camera having a rectangular cylindrical shape as shown in FIG. The back plate 4 of the case 3 is provided with a recess 12 which is a feature of the present invention. This recess 12 is formed, for example, from the surface of the back plate 40 into the case 3 at the center of the case 30 in the width direction (direction perpendicular to the insertion direction A), at both sides of the bridge portion 130 where the surface of the back plate 40 remains as it is. Each recess 12 has a side wall 14 facing the end surface 11 on the insertion side, and a bottom wall 15 continuous with this side wall 14 is formed as an inclined surface, and the back plate 4 connected to the surface. As shown in FIG. 1, the leaf spring 5 is arranged so as to press the center part of the film 2, which has a processing liquid container 2a and a processing liquid trap 2b at its front and rear ends. An extra space is formed in the center of the back plate 4 where the leaf spring 5 is arranged,
The recess 12 is provided using this space.

Next, the functions and effects of the cartridge I having the above structure will be explained. When the cartridge 1 is inserted, as shown in FIG.
An inner wall 21 facing the back plate 4 of the inserted cartridge 1
A contact member 22 is provided on the top. This abutting member 22 is formed by molding, for example, plastic with high elasticity, and as shown in the enlarged view of FIG.
3 to the rear side of the loading section 20 (downward in the figure) with a cross section "<"
It has a pressing part 24 formed in a square shape. The contact claw 23 is fixed to the inner wall 21 and is connected to the corresponding contact claw 23 and the pressing portion 24.
It is rotatable in the direction of arrow B in the figure about a rotation shaft 25 that pivotally supports the contact member 22 between the two. The end of the pressing part 24 is in contact with the inner wall 21, and the abutting claw 2
3 also has inner wall 21 under the condition that cartridge 1 is not loaded.
It is designed to be in contact with

In the loading section 20 of a camera whose mechanism such as a shutter is designed based on the sensitivity of the film 2 of the cartridge 1 and is compatible with the film 2, the abutment member 22 as described above is located at the center of the loading section 200 in the width direction. It is attached. On the other hand, mechanisms such as shutters are designed based on a sensitivity different from the sensitivity of the film 2 of the cartridge 1, and the loading section 2 of the non-conforming camera cannot give proper exposure to the film 2.
0', the abutment member 221 is attached at a position shifted to the left or right from the center in the width direction of the loading section 20' (see FIG. 5).

Insert the cartridge 1 into the loading section 20 of the above-mentioned compatible camera.
When inserted from the 1 side, the pressing part 24 of the abutting member 22 is pushed down by the end surface 11 of the cartridge 1, so that the abutting claw 23, which had been in contact with the inner wall 21 and was not caught on the end surface 11 of the cartridge 1, is pushed down. rotates toward the back plate 4 of the cartridge 1 and comes into pressure contact with the back plate 4.

When the cartridge 1 is further fed to the back of the loading section 20, the abutment pawl 23 slides on the bridging portion 13 of the back plate 4, and the cartridge 1 is stuck where the end surface 11 touches the back wall 26.
P # h = Dyodo π magazine is increased due to filial piety (displayed by solid line in Figure 3).

Meanwhile, the cartridge 1 is inserted into the loading section 20 of the non-conforming camera.
', the contact claw 23 rotated toward the back plate 4 of the cartridge l in the same way as in the above case, enters the recess 12 as the cartridge 1 is fed, and finally enters the recess. 12 side walls 14 (represented by imaginary lines in FIG. 3). This side wall 14 is set at a position where it comes into contact with the abutting claw 23 during the insertion of the cartridge 1, so that it is impossible to feed the cartridge 1 to the normal loading position. This prevents the cartridge 1 from being loaded into an incompatible camera and being used incorrectly.

When all the film 2 has been used up, pull the cartridge 1 in the opposite direction of the arrow A to the loading section 20 of the compatible camera.
When removed from the cartridge, the contact claw 23 is urged toward the inner wall 21 by the elasticity of the pressing portion 24, and returns to the position where it contacts the inner wall 21 and allows insertion of the next cartridge 1. cartolle 1
When removing the cartridge 1 from the loading section 20' of the non-conforming camera that has prevented incorrect loading, the abutting claw 23, which is biased as described above, is pulled out from within the recess 12 along the bottom wall 15. After that, it returns to the position in contact with the inner wall 21 in the same manner as in the above case.

In addition, in the above explanation, an example was given in which the bridge was provided in the center of the recess, but the position of the bridge may be changed depending on the sensitivity or type of film, and in extreme cases, the bridge may be placed in the center of the recess. Of course, it may also have a crosslinked portion at the end.

A camera compatible with these cartridges is provided with an abutment claw at a position on the inner wall of the loading portion corresponding to the bridge portion of the cartridge.

Note that the loading section 2 into which the cartridge 1 of the above embodiment is loaded
The abutting member 22 attached to the cartridge 0 is formed so that the abutting claw 23 rotates so that the end face 11 of the cartridge does not get caught when the cartridge 1 is inserted.
Other methods may be used to prevent the end surface 11 from getting caught. For example, using the above example,
If the edge of the end surface 11 on the side of the abutment part 20 is rounded and the abutment member is made into a simple leaf spring shape without the suppression part 24, the tip of the abutment member is guided by the roundness. It bends elastically toward the inner wall 21 and does not get caught on the end surface 11.

Further, as shown in FIG. 6, the recess 1 of the cartridge 101
A protrusion housing recess 130 adjacent to the cartridge 12 is provided, and as shown in FIGS. 7 and 8, the cartridge 10
If the abutment member 122 is made of a plate spring and has a protrusion 131 protruding toward the side 1, when the cartridge 101 is inserted into the loading section 120, the protrusion 131 will not touch the cartridge 1.
019 When the contact claw 123 comes into contact with the back plate 104 and is separated from the end surface 111, and the protrusion 131 is accommodated in the protrusion accommodation recess 130, the contact member 122 is displaced toward the cartridge 101 by its own elasticity and comes into contact with the cartridge 101. The contact claw 123 can come into contact with the side wall 114 of the recess 112.

Further, in the above explanation, a cartridge in which a bridging portion is provided in the recess has been described, but as shown in FIG. By forming a slope 16 that continues from the bottom wall 15 to the surface of the back plate 40, the abutment claw 22 of the compatible camera partially falls into the recess of the cartridge, but from there it forms the slope that continues to the surface again. The cartridge may be normally loaded because the cartridge is moved upwards, and the abutting claw 22' of the mismatched camera may be locked to the side wall 14 of the recess to prevent the cartridge from being loaded.

The cartridges 1 and 101 of the embodiments described above are designed to prevent incorrect loading due to incompatible film sensitivities, but Akira Moto's cartridges are designed to prevent erroneous loading due to incompatible film sensitivities. It may be formed to prevent incorrect loading, and if multiple film types such as film sensitivity and shooting light used are not all compatible with the camera, loading will be blocked. Fu F -ko Ar+ shi~ hte rohi -
1. Cartridges 1, 101 having recesses 12, 112 as described above have recesses 12, 112,
, 112, it does not have any extra protruding parts to the outside, so the manufacturing and assembly equipment used to manufacture cartridges without such recesses can be used as is, or the same equipment can be used. It can be manufactured using slightly modified equipment. Therefore, the cartridge of the present invention can be used in cases where a cartridge without a function to prevent incorrect loading has already been manufactured and a film type is subsequently added to prevent incorrect loading of the cartridge. It is advantageous.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a cartridge according to a first embodiment of the present invention, FIG. 2 is a perspective view of the cartridge, and FIG. 3 is a partially cutaway side view showing the relationship between the cartridge and the cartridge loading section of the camera. , FIG. 4 is a partially cutaway side view showing an enlarged view of a part of the loading section, FIG. 5 is an explanatory diagram showing the relationship between the cartridge and the cartridge loading section of the camera, and FIG. FIG. 7 is a partially cutaway side view showing the relationship between the cartridge of the second embodiment and the cartridge loading section of the camera. FIG. 8 is a perspective view showing the cartridge of the second embodiment. FIG. 9 is a perspective view showing an enlarged contact member. FIG. 9 is a perspective view showing a cartridge according to a third embodiment of the present invention. 1, 101... Film cartridge 4, .
104... Back plate 12, 112... Recess 14, 114... Side wall of the recess 20. 20', 120... Cartridge loading section 21 of the camera... - Loading part inner wall 22, 22', 122... Contact member No. 3, Fig. 5, Fig. 146, Fig. 1117, w! 48 Figure 9

Claims (1)

[Claims] In a film cartridge that is inserted into a cylindrical film cartridge loading section of a camera from one end side, when the cartridge is inserted, the surface of the cartridge facing the inner circumferential wall of the loading section is facing toward the one end side and in the direction of insertion and loading. On the other hand, a recess with vertical side walls is provided, and when the camera is inserted into the camera, the abutment member attached to the inner wall of the cartridge loading section of the non-conforming camera enters the recess and touches the side wall during insertion. A film cartridge for preventing incorrect loading, characterized in that an abutting member attached to an inner wall of a cartridge loading portion of a compatible camera does not abuttly engage with the side wall.