JPH07159934A - Instant film pack and camera - Google Patents

Abstract

PURPOSE:To improve the performance suitable for disposal of a film pack and the light shielding performance of the film pack. CONSTITUTION:Two pressure openings 20 are separately formed on the base plate 11b for a case 11 in a direction of discharging a film unit 12. A base plate side light shielding sheet 30 is arranged between the film unit 12 and the base plate 11b. The base plate side light shielding sheet 30 is constituted of an elastic member, and the sheet 30 is fixed on the base plate 11b through calking parts 31. The adhesive layer is formed on the peripheral part of the pressure opening 20 so that the pressure opening 20 may be shielded from light. The pressure member provided on the camera side is inserted through the pressure opening 20 so as to press the light shielding sheet 30 against the exposure aperture 13. Thus, the need of a metallic spring is eliminated, the whole parts of the used film pack 10 are made of synthetic resin, so that the performance suitable for disposal is improved. The pressure openings are separately formed, so that the miniaturization of the pressure member on the camera side and the light shielding performance of the film pack are improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low cost instant film pack and a camera which are excellent in disposal and recycling suitability.

[0002]

2. Description of the Related Art An instant camera is widely known as a camera that allows a photograph to be viewed immediately on the spot where the photograph is taken. This instant camera is used by loading the instant film pack in the film pack loading chamber of the camera body. The instant film pack has a stack of self-processing film units. Then, every time one image is taken, the film unit is taken out from the taking-out port provided on the upper surface of the camera body. At this time, the developing roller in the camera body cleaves the developer pod of the film unit to spread the developer on the exposed surface and perform the developing process. As a result, an image appears on the taken out film unit after a while.

An instant film pack is a plastic case 2 as shown in FIG. 16 in which film units 3 are stacked and housed. The case 2 comprises a frame 2a having an exposure opening 4 and a bottom plate 2b. It is configured. Further, a notch 6 is formed in the frame body 2a so as to be continuous with the exposure opening 4, and a claw member 5 for ejecting the film unit 3 having been photographed is inserted into the notch 6. Further, a discharge port 7 is formed on one end side of the case 2, and the film unit 3 that has been photographed is discharged. In the upper portion of the frame body 2a that constitutes the discharge port 7,
A metal clip 8 is fitted to reinforce the discharge port 7. In addition, a metal pressure plate 9 is attached to the bottom plate 2b in the case 2, and the pressure plate 9 is provided with springiness by a plurality of notches and bending. Due to this spring property, the pressure plate 9 presses the film unit 3 toward the exposure opening 4 side to give the film unit 3 a flatness.

Such an instant film pack is loaded into an instant camera, and when all the stored film units have been photographed, they are taken out of the instant camera and discarded as incombustibles.

[0005]

However, the film pack to be disposed of is a plastic case 2.
Since different kinds of materials such as the metal pressure plate 9 and the reinforcing clip 8 are used, it is not preferable from the viewpoint of environmental protection to discard them as they are. On the other hand, it is conceivable to disassemble the same and dispose of each of the same materials, or to recycle them, but in this case, it is necessary to destroy the case and take out the metal pressure plate 9 and the clip 8. There is. Therefore, it is practically difficult to separate and process each material, because a large amount of waste or recycling is too expensive. Also,
The metal pressure plate 9 has a high processing cost, which raises a problem that the cost of the film pack itself is increased or the weight of the film pack is increased.

Further, Japanese Utility Model Laid-Open No. 63-150939 or Japanese Utility Model Laid-Open No. 63-150954 discloses a film pack in which the pressure plate is not incorporated, and the film unit is exposed by the pressure plate provided on the back cover of the camera. It can be pressed against the opening side. However, in such a pressure plate, the central portion where the pressure plate directly contacts is surely pressed against the exposure opening side, but the pressure is not sufficient on both ends of the film unit. Therefore, when the film unit is pressed uniformly, the pressure plate provided on the camera side becomes large in size, which causes a problem of increasing the weight of the camera. Further, since it is necessary to make a large opening on the side of the film pack into which the pressure plate is inserted, there is a problem that the light-shielding property of the film pack is reduced and the strength of the case is also reduced.

The present invention is to solve the above problems,
By omitting the pressure plate made of metal, which was necessary for conventional instant film packs, the manufacturing cost of film packs can be reduced, and after use, it can be easily discarded or recycled, and the film pack's light-shielding property and An object of the present invention is to provide an instant film pack whose strength is not reduced, and also provide a camera improved so that such a film pack can be used.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 forms a plurality of pressing openings on the bottom plate of the case so as to be separated from each other in the discharge direction of the film unit. A light-shielding sheet having elasticity and for closing the pressing opening is disposed between the film unit and the bottom plate of the case, and the light-shielding sheet is partially or entirely sealed on the bottom plate.

According to the second aspect of the present invention, a plurality of pressing openings are formed on the bottom plate of the case so as to be separated from each other in the discharge direction of the film unit, and elasticity is provided between the film unit and the bottom plate of the case within the case. A light-shielding sheet for occupying the pressing opening is disposed, and the light-shielding sheet is partially or entirely weakly sealed to the bottom plate, and the sealing member is peeled off by the pressing member when the camera is loaded into the camera. The light-shielding sheet is pushed toward the exposure opening side by the so as to push the film unit toward the exposure opening.

According to the third aspect of the present invention, a plurality of pressing openings are formed on the bottom plate of the case so as to be separated from each other in the discharge direction of the film unit, and the pressing opening is provided between the film unit and the bottom plate of the case in the case. A light-shielding sheet for closing the opening is arranged, and a holding sheet having elasticity and pressing the film unit toward the exposure opening side is arranged between the light-shielding sheet and the film unit, and the light-shielding sheet is partially formed on the bottom plate. Or the entire surface is strongly sealed, and the light shielding sheet is pierced by the pressing member when loaded in the camera, and the pressing sheet is pressed by the pressing member that has entered from the pressing opening, and the film unit is pressed toward the exposure opening. It is a thing.

Further, according to the invention of claim 4, a plurality of pressing openings are formed on the bottom plate of the case so as to be separated from each other in the discharging direction of the film unit, and elasticity is provided between the film unit and the bottom plate of the case in the case. A light-shielding sheet is provided to close the pressing opening, and the light-shielding sheet is stacked on a case and brought into close contact with the bottom plate by pressure from a specified number of film units to be stored. The light-shielding sheet is pushed toward the exposure opening side and the film unit is pushed toward the exposure opening side.

According to a fifth aspect of the present invention, in the camera using the instant film pack according to any one of the first to fourth aspects, the back cover is provided in the pressing opening of the instant film pack with the back cover closed. A pressing member of the film unit is provided at a facing position, and the pressing member enters the instant film pack from the pressing opening by the operation of closing the back cover, and the film unit is exposed to the exposure opening side through the light shielding sheet. It is designed to be pressed.

[0013]

Operation: An unused instant film pack is loaded in the loading chamber of the instant camera, and the back cover of the camera is closed. By this closing operation of the back lid, the plurality of pressing members attached to the inside of the back lid enter the case through the pressing openings formed in the bottom plate of the film pack. At this time, if the light shielding sheet is weakly sealed to the bottom plate,
When the light shielding sheet is brought into close contact with the bottom plate by the pressure from the film unit, the light shielding sheet is peeled off from the bottom plate, and the film unit is pressed against the exposure opening side by the pressing member via the light shielding sheet. Further, when the light shielding sheet is strongly sealed to the bottom plate, the light shielding sheet is pierced by the pressing member, and the film unit is pressed against the exposure opening side by the pressing member via the pressing sheet.

Since the film unit is pressed by the pressing member at a plurality of positions distant from each other in the discharging direction of the film unit, and further, the light shielding sheet having elasticity is interposed, the pressing force of the pressing member and the elasticity of the light shielding sheet. The repulsive force due to the deformation ensures that the film unit is pressed against the exposure opening side. As a result, the end of the film unit on the pod side containing the developer is set at a position facing the discharge port of the case, so that the film unit surely enters the discharge port of the case. Further, since the end of the film unit on the trap portion side is set at the position where the claw member is locked, the film unit is securely locked by the claw member and discharged from the discharge port.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an instant film pack 10 embodying the present invention comprises a rectangular case 11 made of plastic and a film unit 12 stacked on top of it. The case 11 includes a case body 11a having a rectangular frame shape and a bottom plate 11b having a rectangular shape. Then, with the film unit 12, the light-shielding cover 14, and the light-shielding sheet 30 which will be described later built in, the case body 11a and the bottom plate 11b are joined together by an adhesive or ultrasonic welding. The film unit 12 has
Exposure unit 12a and developer pod 12b containing a developer
And a trap portion 12c that absorbs excess developer during development
And are provided. The developer pod 12b and the trap portion 12c are slightly swelled more than the exposure portion 12a. Therefore, when about 10 film units 12 are stacked and housed in the case 11, the thickness of both end portions is large and the thickness of the central portion is large. Is less.

An exposure opening 13 is formed on the upper surface of the case body 11a to determine the exposure range of the film unit 12. The exposure opening 13 is covered with an upper light-shielding cover 14 which is superposed on the uppermost film unit 12 when not in use. A notch 15 into which the well-known claw member 5 is inserted is continuously formed in the exposure opening 13. Further, a slit-shaped discharge port 16 (see FIG. 5) is formed on the upper side of one end of the case body 11a. Immediately after setting the film pack 10, the upper light-shielding cover 14 is discharged from the discharge port 16 by pressing a shutter button 49, which will be described later, and the film unit 12 is discharged after photographing. Further, the corner portion of the exposure opening 13 on the side of the discharge port 16 is cut out in a rectangular shape to form a notch 13a for imprinting a date. A date imprinting mechanism (not shown) is arranged in the film pack loading chamber of the instant camera corresponding to the notch 13a. The date imprinting mechanism imprints the date, time, etc. when the film unit 12 is ejected.

As shown in FIG. 2, the bottom plate 11b is provided with a pair of pressing openings 20 and a pair of unit support projections 22. The pair of pressing openings 20 are provided apart from each other in the discharging direction of the film unit 12, and are formed in a rectangular shape long in the direction orthogonal to the discharging direction. The pressing opening 20 serves to expose the film unit 12 to the exposure opening 1
The pressing member 25 on the camera side that presses the 3rd side serves as an entrance when entering the film pack 10. The pressing opening 20 may be formed in an appropriate shape such as an ellipse, a circle, or a rectangular shape with rounded corners, instead of the rectangular shape.

The pair of unit support projections 22 are formed so as to project to both end portions of the bottom plate 11b in a direction orthogonal to the unit discharge port 16. As shown in FIG. 1, this protruding shape has a case 11 in which a prescribed number (10 in this embodiment) of film units 12 and an upper light-shielding cover 14 are provided.
Is stored, the curve corresponds to the curve of the lowermost film unit 12 due to the difference in thickness between the end portions having the developer pod 12b and the trap portion 12c and the central exposure portion 12a. Therefore, the uppermost film unit 12 is made flat and pressed against the exposure opening 13 side. In addition, when the film pack 10 is loaded into the camera, even if the upper light-shielding cover 14 of the exposure opening 13 is accidentally held down, the film unit 12 is supported by the unit supporting protrusions, so that the film opening from the exposure opening 13 The upper light-shielding sheet does not sink and the light is prevented from entering the film unit.

As shown in FIG. 1, the bottom plate 11b is provided with a bottom plate-side light-shielding sheet 30 formed in a size one size smaller than the film unit 12. The bottom plate-side light-shielding sheet 30 is attached to the bottom plate 11b between the pair of unit support projections 22 via the caulking portion 31. As shown in FIG. 2, the caulking portion 31 is used for the light shielding sheet 3
After the mounting pin 31a is projected from a pair of mounting holes 32 provided in the vicinity of the central portion of 0, the projecting pin 31a is crushed by welding. Also, the bottom plate 11b
An adhesive layer 33 coated with an adhesive is formed on the peripheral portion of the pressing opening 20. Thereby, the pressing opening 20
Is sealed by a light shielding sheet 30. An adhesive having a weak adhesive force is used, so that, as will be described later, when the pressing member 25 provided on the back cover of the camera enters, this portion is easily peeled off. Further, the adhesive may be applied to the corresponding portion of the light shielding sheet 30 or to the entire surface of the light shielding sheet, instead of being applied to the peripheral portion of the pressing opening 20.

The bottom plate-side light-shielding sheet 30 has a thickness of 0.15 to 5 due to its elasticity and a plastic film.
The thickness is 0.5 mm, more preferably 0.2 to 0.4 mm. In particular, it has excellent heat resistance and is resistant to deformation even at high temperatures, and has the property of retaining its shape for a long time even when loaded with high temperature resistance, so there is little performance deterioration even when loaded at high temperatures. Plastic films such as polycarbonate and polyarylate are preferred.

It is preferable that the surface of the light-shielding sheet 30 has good slipperiness, so that even if the pressing member 25 on the instant camera side comes into contact and pushes up the light-shielding sheet 30, the pressing member 25 cannot be pushed laterally. Force is not applied, the slidability of the pressing member 25 is not impaired, and the durability is also improved.

Further, the slip resistance μ1 between the film unit 12 and the light shielding sheet 30 and each film unit 12
By setting the relationship with the slip resistance μ2 between μ1> μ2, the lowermost film unit (10th film unit) 12 in the film pack 10 and the light shielding sheet 3
Between 0 and 0, the slip resistance between each film unit 12 μ2
A larger slip resistance μ1 occurs. This gives 9
Since the tenth sheet is not dragged to be ejected at the time of ejecting the first sheet, and the slip resistance μ1 is set to a small slip resistance such that the last film unit 12 can be smoothly ejected, the last film is set. When the unit 12 is discharged, the film unit 12 can be reliably discharged without coming off from the claw member. Furthermore, the load on the claw member can be reduced.
As the method of imparting the slipperiness, the surface of the light-shielding sheet 30 may be processed to have a grain surface, a matte surface, or a lubricant may be added when the plastic film is manufactured.

The bottom plate-side light-shielding sheet 30 includes the developer pod 12a side and the trap side 12c of the film unit 12.
The width of the edges is about 4 to 7 mm and is bent in a V shape toward the exposure opening 13 side. The elasticity of the bent portion 30a causes both end portions of the film unit 12 to be exposed.
I try to push it firmly to the side. Therefore, the edge of the film unit 12 on the side of the developer pod 12b is surely set at a position facing the unit discharge port 16, and the film unit 12 can be surely discharged. Further, since the edge of the film unit 12 on the trap portion 12c side is pressed against the notch 15 side of the claw member, the film unit 12 can be reliably locked by the claw member, and the film unit 12 can be discharged. It can be done reliably.

Next, the above instant film pack 1
An instant camera using 0 will be described. In FIG. 3, which shows the use state of the instant camera, the instant camera 40 has a body portion 41 having a thin box-shaped contour, a grip 42 integrally provided on the body portion 41, and a body portion 41. Lens board 4 that can be undulated
3, support stays 44 and 45 for supporting the lens board 43 from below, and a left finger support 46 engaged with the support stay 44 and the main body 41. Further, a bellows 47 is provided between the main body 41 and the lens board 43 to cover the photographing optical path.

A shutter button 49 for performing a shutter release operation is provided on the front surface of the grip 42. Further, the main body 41 is provided with a finder 50 and a strobe device 51 for visually recognizing a shooting range. Further, a slit-shaped outlet 52 is provided on the upper surface for taking out the film unit that has been photographed.

The lens board 43 is provided with a taking lens 54 on the front surface, a shutter and a diaphragm mechanism inside the front surface, and is laid down on the front surface of the main body portion 41 around the mounting shaft portion 55 when the camera is not used. . Further, since the support stay 45 is interlocked with the ups and downs of the lens board 43,
The lens board 43 and the main body 41 are engaged with each other. When the camera 40 is not used, the lens board 43 rotates about the mounting shaft 56 with respect to the lens board 43 and is housed in the main body 41 through the slit 57. Has become. Also, the left finger support 46
Is rotatably attached to the main body 41 via an attachment shaft 58, and the pin 46a is engaged with the slit 44a of the support stay 44. Therefore, the lens board 43
When is laid down, it is housed between the lens board 43 and the main body 41 in conjunction with the support stay 44. As a result, the camera 40 becomes a thin box-like shape as shown in FIG. 4 when not in use, and portability is improved.

As shown in FIG. 3, the bellows 47 are attached so as to connect the lens board 43 and the main body 41 in a light-tight manner. This bellows 47 is expandable and contractible,
Interlocking with the fall of the lens board 43, the main body 41 is folded while being shielded from light, and is housed between the main body 41 and the lens board 43.

As shown in FIG. 5, which is a sectional view of the instant camera 40, a hinge 6 is provided on the back surface of the main body 41.
A back lid 61 is provided through the opening 0, and when the back lid 61 is opened, the film pack loading chamber is exposed. The instant film pack 10 is provided in the film pack loading chamber.
Is loaded. In the film pack 10 shown in FIG. 5, five film units 12 are drawn, but this emphasizes the thickness of the film unit 12,
Actually, ten film units 12 are stacked and accommodated as shown in FIG.

A discharge port 65 for sending the film unit 12 discharged from the film pack 10 to the above-mentioned take-out port 52 is formed on the upper wall of the film pack loading chamber, and a developing roller pair 66 is formed above the discharge port 65. Is provided. The developing roller pair 66 sandwiches the exposed film unit 12 by rotating in the directions of the arrows, presses the developing solution pod 12b of the film unit 12 and cleaves it, and spreads the developing solution to the exposure section 12a. . Further, a discharge passage 67 is formed in the upper part of the developing roller pair 66, and the film unit 12 is discharged from the take-out port 52 through the discharge passage 67.

As shown in FIG. 5, a pressing member 25 is provided inside the back cover 61. The pressing member 25 includes a protruding block 71, a leaf spring 72, and a holding member 73 that holds these. As shown in FIG.
The holding member 73 is used for the pressing opening 20 of the film pack 10.
It is formed so as to project from the back cover 61 at a position facing the back cover 61, and as shown in FIG. 6, is provided with a holding hole 73a for holding the projecting block 71 and the leaf spring 72. The protruding block 71 has a tip 71a rounded in an arcuate cross section, and the holding hole 7 of the holding member 73 is provided via a flange 71b.
It does not fall off from 3a. The leaf spring 72 biases the projecting block 71 to project from the holding member 73. Instead of using the leaf spring 72, a coil spring may urge the protruding block 71 in the protruding direction. The protrusion block 71 is displaced between the maximum protrusion position and the minimum protrusion position by the leaf spring 72. At the maximum projecting position, the projecting block 71 presses the last film unit 12 against the exposure opening 13 via the light shielding sheet 30. Further, at the minimum protruding position, the protruding block 71 presses the upper light-shielding cover 14 against the exposure opening 13 in a state where the specified number of film units 12 are loaded.

As shown in FIG. 5, the pressing member 25 enters the film pack 10 through the pressing opening 20 and presses the bottom plate side light shielding sheet 30. As a result, the light shielding sheet 30 is lifted from the bottom plate 11b, and the film unit 12 is pressed against the exposure opening 13 side. Further, the elasticity of the light shielding sheet 30 itself and the pressing of the pressing member 25 press the ends of the film unit 12 on the developer pod 12b side and the trap section 12c side. Therefore,
The trap portion 12c side of the film unit 12 is securely caught by the claw member, and the pod portion 12b side thereof is provided with the discharge port 65.
Surely get in.

Next, the operation of the above embodiment will be described.
First, as shown by the chain double-dashed line in FIG. 5, the back cover 61 of the instant camera 40 is opened, and the film pack 10 is loaded into the film pack loading chamber. Instant camera 4
0 is folded into a thin box shape as shown in FIG. 4 when not in use. When used, the lens board 43 is raised and supported by the support stays 44 and 45 to be in the use state shown in FIG.

As shown in FIG. 5, when the back cover 61 is closed after the film pack 10 is loaded, the pressing member 25 enters the film pack 10 through the pressing opening 20 formed in the bottom plate 11b of the film pack 10. Then, the seal formed by the adhesive layer 33 (see FIG. 2) between the light shielding sheet 30 and the bottom plate 11b is peeled off. By the protruding block 71 of the pressing member 25 that has entered, the film unit 12 and the upper light-shielding cover 14 are exposed through the light-shielding sheet 30 to the exposure opening 13 of the case body 11a.
Push it to the side.

After the film pack 10 is loaded, as shown in FIG. 3, the shutter release is performed by pressing the shutter button 49 once. Immediately after this, the light shielding cover 14 is pressed.
Is discharged. For this discharge, the claw member is notched 1
It is carried out by entering 5 and engaging with the light shielding cover 14 and sending it to the discharge port 16. Light-shielding cover 1 sent out
4 passes through the discharge port 65 of the film pack loading chamber, passes through the discharge passage 67 by the developing roller pair 66, and the discharge port 52.
Emitted from. After that, the unexposed film unit 12 is set in the exposure opening 13 to be ready for photographing. Then, every time the image is taken by the release operation, the film unit 12 that has been taken is ejected. Since both ends of the film unit 12 are surely pressed against the case body 11a by the bent portions 30a of the light shielding sheet 30, the film unit 12 set in the exposure opening 13 is flattened. Moreover, the film unit 12
The developer pod 12b is set at a position facing the discharge port 16 and the trap portion 32c side is also pressed against the notch 15, so that it is securely locked to the claw member and the film unit 12 having been photographed is surely discharged. be able to. Therefore, the flatness of the film unit 12 and the reliability of the discharge are maintained.

In the above embodiment, the pressing member 25 is provided with the leaf spring 72 for pressing the film unit 12, but instead of this, a coil spring or a torsion spring is provided depending on the number of the film units 12 and the pressing force. May be used. Further, the pressing member 25 is integrally formed so as to be long in the width direction of the film unit 12, but as shown in FIG. 7, it has four pressing members 75 divided in the width direction of the film unit on the back cover 74. You may form. Further, the numbers and shapes of the pressing members 25 and 75 are the same as those of the film unit 1.
It can be arbitrarily changed according to the size, rigidity, etc.

Further, in order to surely shield the pressing opening 20 from light, the peripheral portion of the light shielding sheet 30 is sealed by the adhesive layer 33 having a weak adhesive force in the first embodiment, but instead of this, FIG. As in the second embodiment shown in FIG. 5, an adhesive layer 34 having a strong adhesive force is formed on the peripheral portion of the pressing opening 20, and the pressing opening 20 is strongly sealed by a light shielding sheet 35 to shield light. Good. The details of the configuration other than the description are the same as those of the first embodiment, and the same components are designated by the same reference numerals. The adhesive layer 34 is applied to the light shielding sheet 30 instead of being applied to the peripheral portion of the pressing opening 20.
It may be applied to the corresponding part or the entire surface of.

A thin light-shielding sheet 35 is used. When the back cover is closed after setting the instant film pack in the film pack loading chamber of the camera, the light-shielding sheet 35 can be easily pierced by the pressing member 25. ing. The light blocking sheet 35 has a hole 35a through which the mounting pin 31a passes. Further, an elastic pressing sheet 36 is arranged between the light shielding sheet 35 and the film unit 12. The pressing sheet 36 is configured in the same manner as the light shielding sheet 30 of the first embodiment, and has bent portions 36a at both ends and mounting holes 36b at the central portion, which itself has a light shielding property. No need.

Further, in the first embodiment shown in FIG. 2, the adhesive layer 33 may be omitted. In this case, the light shielding sheet 30 is attached to the bottom plate 11b by the pressure from the film units 12 when the specified number of film units 12 are stacked.
To be in close contact with.

Further, as in the third embodiment shown in FIG.
The light shielding sheet 76 may be simply arranged between the film unit 12 and the bottom plate 11b, and the fixing by the caulking portion at the central portion may be omitted. With this configuration, it is not necessary to crush the tip of the mounting pin 31a to crimp it, and the production of the film pack is simplified.

Further, as in the fourth embodiment shown in FIGS. 10 and 11, in addition to the light-shielding sheet 30 similar to that of the first embodiment, the sub-light-shielding sheet 80 is provided with the adhesive tape 81 for each pressing opening 30. It may be attached so as to be openable and closable so as to have a light shielding property. For details of the configuration other than the description, refer to the first section above.
This is the same as the embodiment, and the same components are designated by the same reference numerals. In this case, the outer edge side of the sub light-shielding sheet 80 is adhered to the bottom plate 11b with the adhesive tape 81. Therefore, by the protrusion block 71 of the pressing member 25 entering,
The sub-light-shielding sheet 80 is pushed open centering on the adhesive portion by the adhesive tape 81. At this time, the projecting block 71 is attached to the film pack 10 before the back cover 61 is completely closed.
Although it enters inside, the light-shielding sheet 30, the sub-light-shielding sheet 80, and the unit support projections 22 at this time surely prevent outside light from entering the film pack.
In addition to the adhesive tape 81, the sub-light-shielding sheet 80 may be attached to the bottom plate 11b by a caulking portion or an adhesive.

In each of the above-described embodiments, both ends of the bottom plate side light-shielding sheet 30 and the pressing sheet 36 are bent toward the exposure opening side, and both ends of the film unit 12 are exposed to the case main body by the bent portions 30a and 36a. I tried to press firmly against the opening 20 side, but this bent portion 30
A flat light-shielding sheet or a pressing sheet may be used without forming a and 36a.

As described with reference to FIG. 16, a metal clip 8 is fitted into the discharge port 7 of the conventional film pack for the purpose of reinforcement. But this clip 8
Is unsuitable for improving the suitability for discarding and recycling of the film pack, which is the object of the present invention, but it must be abolished. However, if this is simply abolished, the strength of the discharge port 7 will decrease, and The discharge port 100 may be deformed as shown in FIG. 12 due to the pressing of the film unit from. If the discharge port 100 is deformed, it becomes difficult to maintain the flatness of the film unit, and it may not be possible to obtain a high quality photograph. In addition, the discharged film unit may become unstable, or the developing solution may become unstable because the positional relationship between the discharge port and the developing roller is not fixed.

In order to solve the above problem, as shown in FIG. 13, the projection 101 may be projected in the film pack loading chamber of the instant camera to correct the deformation of the discharge port 100. Further, as shown in FIG. 14, the ejection port 100 can be positively deformed by further projecting the protrusion 102. When developing the developing solution for the normal film unit, the developing solution is likely to collect near the central portion, and therefore, by pressing the central portion with the discharge port 100, the distribution of the developing solution can be uniformly corrected. Protrusion 101
In addition to those having a planar pressing member as shown in the figure,
It may be an arcuate pressing member that is gently curved.

In each of the above embodiments, the pressing opening 20 is used.
The film pack 107 is formed in a rectangular shape, but as in the fifth embodiment shown in FIG. 15, a finger-hanging projection 106 is formed in one of the pair of pressing openings 105 to form a film pack 107. Good. In this case, by placing a finger on the protrusion 106, it is possible to easily take out an empty pack that has been photographed from the film pack loading chamber of the camera. In addition, the protrusion 10
6 may be projected in a rectangular shape or a triangular shape instead of being projected in an arc shape.

[0045]

As described above, in the film pack of the present invention, the pressing opening is formed in the case, the pressing opening is shielded by the light shielding sheet, and the pressing member which enters the case through the opening is instant. Since it was installed on the back cover of the camera,
It is not necessary to provide a metal pressure plate in the film pack. Therefore, it is possible to improve the disposal suitability and the recycling suitability of the used film pack and reduce the cost and weight of the film pack.

Further, since a plurality of pressing openings are formed on the bottom plate of the case so as to be separated from each other in the discharge direction of the film unit, the film units can be pressed by the pressing members at a plurality of positions separated from each other in the discharge direction of the film unit. It can be pushed with an elastic light-shielding sheet interposed therebetween. In particular, by fixing the vicinity of the central portion of the light-shielding sheet to the bottom plate and the pressing member pressing between both end portions of the light-shielding sheet and the central fixed portion, the light-shielding sheet is centered on the central fixed portion. It deforms and the amount of elastic deformation at both ends becomes maximum. As a result, both ends of the film unit can be reliably pressed against the exposure opening side by the repulsive force due to the elastic deformation of both ends of the light shielding sheet. Therefore, the end of the film unit on the side of the pod containing the developer is set at a position facing the discharge port of the case, so that the film unit surely enters the discharge port of the case. Further, since the end of the film unit on the trap portion side is set at the position where the claw member is locked, the film unit is securely locked by the claw member and discharged from the discharge port.

Further, since a plurality of pressing openings are formed on the bottom plate of the case so as to be separated from each other in the discharge direction of the film unit, the pressing members provided on the camera side are dispersed, so that the pressing member can be made small. Therefore, the weight of the camera can be reduced and the camera can be made compact. Further, since the pressing openings are also arranged in a dispersed manner, it is possible to suppress the strength reduction of the case.

Further, by weakly sealing the light-shielding sheet to the bottom plate, the film pack can be securely shielded from light, and the resistance of the pressing member to enter the film pack when the film pack is loaded into the camera. Can be made smaller. As a result, the spring of the pressing member does not increase in size, and the camera can be made lightweight and compact. In addition, the light-shielding sheet is strongly sealed to the bottom plate, and by using a thin light-shielding sheet, the light-shielding property of the film pack is enhanced in the same manner as described above, and the light-shielding sheet is easily broken by the pressing member. The resistance to entry into the film pack can be reduced.

Further, a pressing member of the film unit is provided on the back cover of the camera at a position facing the pressing opening of the instant film pack with the back cover closed, and this pressing member is operated by closing the back cover. Since the film unit enters the instant film pack from the pressing opening and presses the film unit to the exposure opening side through the light-shielding sheet, the instant film pack having excellent suitability for disposal and recycling can be used. Like

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a film pack according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a film unit of the film pack, a bottom plate-side light-shielding sheet, a bottom plate, and a camera-side cover plate.

FIG. 3 is a perspective view showing an appearance of an instant camera using the same film pack in a use state.

FIG. 4 is a perspective view showing an appearance of the instant camera in a non-use state.

FIG. 5 is a cross-sectional view of essential parts showing the instant camera and the film pack.

FIG. 6 is a perspective view showing a notch of a pressing member.

FIG. 7 is a perspective view showing another pressing member.

FIG. 8 is an exploded perspective view showing a light-shielding sheet, a sub-light-shielding sheet, and a bottom plate of the film pack according to the second embodiment.

FIG. 9 is a sectional view showing a film pack and a back cover of a third embodiment.

FIG. 10 is an exploded perspective view showing a light-shielding sheet and a bottom plate of a film pack according to a fourth embodiment.

FIG. 11 is a cross-sectional view showing the same film pack and back cover.

FIG. 12 is an explanatory view showing a deformed state of the discharge port of the film pack.

FIG. 13 is a front view showing a protrusion that prevents the deformation of the discharge port.

FIG. 14 is a front view showing an embodiment in which a discharge port is positively deformed.

FIG. 15 is a perspective view showing a pressing opening of the film pack of the fifth embodiment.

FIG. 16 is a perspective view showing an appearance of a conventional film pack.

[Explanation of symbols]

 10 film pack 11 case 11a case body 11b bottom plate 12 film unit 13 exposure opening 20 pressing opening 22 unit supporting protrusion 25,75 pressing member 30 light shielding sheet 30a folding part 33,34 adhesive layer 36 pressing sheet 36a folding part 40 instant camera 61 Back cover 80 Sub-light-shielding sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidefumi Oho 3-13-45 Izumi, Asaka-shi, Saitama Fuji Photo Film Co., Ltd.

Claims (5)

[Claims] 1. A case having an exposure opening formed on an upper surface,
The case is composed of a plurality of rectangular sheet-like film units that are stacked and housed in the case. The case has a discharge port for discharging the exposed film unit from one end side, and a film unit facing the discharge port. In an instant film pack having a cutout into which a claw member to be sent out enters and a pressing opening into which a pressing member on the camera side for pressing the film unit to the exposure opening side is formed, the pressing opening is formed on the bottom plate of the case. A plurality of light-shielding sheets are formed apart from each other in the discharge direction of the unit, and a light-shielding sheet having elasticity and for closing the pressing opening is arranged between the film unit and the bottom plate of the case in the case. An instant film pack that is completely or completely sealed. 2. A case having an exposure opening formed on an upper surface,
The case is composed of a plurality of rectangular sheet-like film units that are stacked and housed in the case. The case has a discharge port for discharging the exposed film unit from one end side, and a film unit facing the discharge port. In an instant film pack having a cutout into which a claw member to be sent out enters and a pressing opening into which a pressing member on the camera side for pressing the film unit to the exposure opening side is formed, the pressing opening is formed on the bottom plate of the case. A plurality of light-shielding sheets are formed apart from each other in the discharge direction of the unit, and a light-shielding sheet having elasticity and for closing the pressing opening is arranged between the film unit and the bottom plate of the case in the case. Or weakly seal the entire surface, and the seal part is peeled off by the pressing member when it is loaded into the camera. An instant film pack, characterized in that a light-shielding sheet is pushed toward the exposure opening to push the film unit toward the exposure opening. 3. A case having an exposure opening formed on an upper surface,
The case is composed of a plurality of rectangular sheet-like film units that are stacked and housed in the case. The case has a discharge port for discharging the exposed film unit from one end side, and a film unit facing the discharge port. In an instant film pack having a cutout into which a claw member to be sent out enters and a pressing opening into which a pressing member on the camera side for pressing the film unit to the exposure opening side is formed, the pressing opening is formed on the bottom plate of the case. A plurality of light-shielding sheets are formed apart from each other in the discharge direction of the unit, and a light-shielding sheet for closing the pressing opening is arranged between the film unit and the bottom plate of the case in the case. And a pressing sheet for pressing the film unit toward the exposure opening side is arranged, and the light shielding sheet is placed on the bottom plate. The seal is partially or entirely strongly sealed, and the light shielding sheet is pierced by the pressing member when it is loaded into the camera, and the pressing sheet is pressed by the pressing member that has entered from the pressing opening to press the film unit toward the exposure opening. Instant film pack characterized by doing so. 4. A case having an exposure opening formed on an upper surface,
The case is composed of a plurality of rectangular sheet-like film units that are stacked and housed in the case. The case has a discharge port for discharging the exposed film unit from one end side, and a film unit facing the discharge port. In an instant film pack having a cutout into which a claw member to be sent out enters and a pressing opening into which a pressing member on the camera side for pressing the film unit to the exposure opening side is formed, the pressing opening is formed on the bottom plate of the case. A plurality of light-shielding sheets are formed separately in the discharge direction of the unit, and an elastic light-shielding sheet for closing the pressing opening is arranged between the film unit and the bottom plate of the case in the case, and this light-shielding sheet is laminated on the case. The film is pressed into contact with the bottom plate by the pressure from the specified number of film units stored in the The instant film pack is characterized in that the light shielding sheet is pushed toward the exposure opening side by the material and the film unit is pushed toward the exposure opening side. 5. A case having an exposure opening formed on an upper surface,
The case is composed of a plurality of rectangular sheet-like film units that are stacked and housed in the case. The case discharges the exposed film unit from one end side, and sends the film unit toward the discharge port. A notch into which the claw member is inserted, a plurality of pressing openings formed on the bottom plate so as to be separated from each other in the film unit discharge direction, and an elastic pressing opening which is arranged between the film unit and the bottom plate of the case. Using an instant film pack having a light-shielding sheet for closing the light-shielding sheet and a seal portion for partially or wholly sealing the light-shielding sheet on the bottom plate, and inserting the instant film pack into the film-pack loading chamber, and then the back cover. In a camera in which the instant film pack is loaded in a light-tight manner. The pressing member of the film unit is provided at a position facing the pressing opening of the instant film pack in the twisted state, and the pressing member enters the instant film pack through the pressing opening by the operation of closing the back cover, A camera characterized in that the film unit is pressed toward the exposure opening side through a light-shielding sheet.