JP3595616B2 - Pack case for instant film - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an instant film pack case in which an instant film is stored, and more particularly, to an instant film pack case in which a pressure plate can be easily taken out from the pack case.
[0002]
[Prior art]
An instant camera capable of obtaining an image recording sheet processed immediately after photographing is widely used for recording in an academic field, and for on-site photographing requiring quickness and confidentiality. Such an instant camera is generally used by loading an instant film pack formed of hard plastic.
[0003]
Conventionally, this instant film pack has a plurality of mono-sheet type self-development type instant films stacked and stored.The structure of the instant film pack is not only a resin case body for storing the instant film but also a light exposure. It comprises an exposure opening for applying to the surface of the instant film, a discharge opening for discharging the instant film after exposure, a plate-shaped pressure plate for pressing the instant film so as to contact the rear surface of the exposure opening, and the like.
[0004]
Of the components constituting these instant film packs, the pressure plate is usually formed by pressing a flat metal plate. For this reason, after all of the instant films have been photographed and all of the instant films have been discharged from the pack case, a metal platen is taken out of the resin pack case according to the generalization of waste separation and collection. Must be disposed separately.
[0005]
[Problems to be solved by the invention]
However, in order to prevent the pressure plate from jumping out of the pack case after all the instant films are discharged, the end portion of the pressure plate is usually fixed to the back surface of the pack case, and the pressure plate is larger than the exposure opening. Is formed. For this reason, when taking out the metal pressure plate from the pack case after all of the instant film shootings have been completed, pry open part of the pack case with pliers, or break part of the pack case with a hammer. Had to be very time-consuming. Also, there is a high possibility of injury during the separation operation.
[0006]
The present invention has been made in view of the above circumstances, and provides a pack case for an instant film in which the pressure plate can be easily separated and taken out of the pack case after all of the instant films have been discharged from the pack case. The purpose is to:
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the instant film pack of the present invention is provided with a discharge port for discharging the exposed instant film to at least one of the surface of the top wall or the inner surface of the plastic instant film pack case. A groove for breaking the top wall is formed along two sides of the exposure opening extending in a direction perpendicular to the direction of the opening, and a pin which is thermally caulked after being inserted into the mounting hole of the pressure plate on the inner surface of the bottom wall and a reinforcing projection are formed. By forming an opening integrally with the strip and inserting a rod-shaped jig through the pressure plate, the tip of the jig inserted through this opening is hooked on the ridge, and the jig is tilted down as a fulcrum of the lever to operate. The pin which has been thermally caulked is broken so that the pressure plate can be separated from the bottom wall .
[0008]
In a second aspect, an elongated hole is formed in the upper surface wall from one end of each of the grooves toward the discharge port.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a pack case for an instant film embodying the present invention. The instant film pack 2 incorporated in the instant camera includes a pack case 3 including a back plate 5, a case body 6, and a pressure plate 7, and a plurality of instant films 4 incorporated therein.
[0010]
The pack case 3 is formed of a relatively hard material such as a black light-blocking thermoplastic resin or pulp. The open surface of the case body 6 that forms the top and side walls of the pack case 3 is The back case 5 which forms the bottom wall of the pack case 3 is coupled so as to cover it to form the pack case 3. An exposure opening 8 of the instant film 4 and a slit-shaped outlet 11 for discharging the photographed instant film 4 are provided on the upper surface wall of the case body 6. A discharge groove 12 into which a claw (not shown) provided on the camera side is inserted in order to push out the photographed instant film 4 is provided at the corner.
[0011]
A steel clip 13 is attached to the exposure port 8 side of the discharge port 11. On both outer sides of the clip 13, elongated holes 14a to 14d are provided along the side surface of the pack case 3. Further, as shown in FIG. 2, cutout grooves 15 a and 15 b are provided on the extension of the elongated holes 14 a to 14 d on the inner surface of the case main body 6 along the side surface of the pack case 3.
[0012]
Two pins 16a and 16b are integrally provided on the inner surface of the back plate 5 constituting the bottom wall of the pack case 3 to protrude. After the pins 16a and 16b penetrate the mounting holes 17a and 17b of the pressure plate 7 described later, the heads are crimped. In the conventional pack case, the pins 16a and 16b have a pin diameter of 3.8 mm and a height of 2.0 mm as shown in FIG. 7A. As shown in FIG. 7 (B), the pin diameter is 2.5 mm and the height is 2.5 mm. A ridge 18 is integrally formed near the center of the inner surface of the back plate 5.
[0013]
The pressure plate 7 is formed of an elastic metal plate, and two of the four leg portions abutting against the back plate 5 are provided with mounting holes 17a for engaging the pins 16a and 16b of the back plate 5, respectively. 17b is provided. The diameter of the mounting hole is 3.9 mm in the conventional pack case, but the diameter of the mounting hole in the pack case 3 of the present invention is 2.7 mm. In the vicinity of the center of the pressure plate 7, an opening 19 having a diameter of about 10 mm is provided. The opening 19 is used when removing the pressure plate 7 from the pack case 3 together with the ridge 18 of the back plate 5.
[0014]
The operation of the instant film pack case having such a configuration will be described. FIGS. 3 and 4 are explanatory views showing a state in which the pressure plate is removed from the pack case after using the instant film pack of the present invention. When the photographing of all the instant films 4 stored in the instant film pack 2 is completed and all the instant films 4 are discharged from the discharge port 11, the pack case 3 including the pressure plate 7 remains as waste. At the time of disposal, the metal pressure plate 7 is separated from the resin pack case 3.
[0015]
When separating the pressure plate 7 of the pack case 3, first, as shown in FIG. 3A, the clip 13 on the discharge port 11 side of the case body 6 is strongly pressed inward. Then, the clip 13 portion is easily folded inside the pack case 3 by the elongated holes 14 a to 14 d provided on both outsides of the clip 13.
[0016]
Next, as shown in FIG. 3 (B), the long holes 14 a to 14 d are cut off and the clip 13 folded into the inside of the pack case 3 is picked up and pulled up strongly. Then, the periphery of the exposure opening 8 is cut by a predetermined width along the cut grooves 15a and 15b provided on the extension of the elongated holes 14a to 14d.
[0017]
The clip 13 is pulled upward, and both side surfaces of the exposure opening 8 are cut out by a fixed width to form an opening having a size from which the pressure plate 7 can be taken out. Then, a spatula jig such as a screwdriver is prepared. As shown in FIG. 4A, the jig 20 is inserted into the opening 19 of the pressure plate 7, and the tip of the jig is hooked on the ridge 18 of the back plate 5 closest to the discharge port 11. When the pressure plate 7 is moved from the back plate 5 by using the jig 20 as a lever, the mounting holes 17a and 17b of the pressure plate 7 break the pins 16a and 16b of the back plate 5. Thereby, the engagement of the pressure plate 7 with the back plate 5 is easily released.
[0018]
Then, since both sides of the exposure opening 8 are already cut out by a fixed width to form an opening having a size that allows the pressure plate 7 to be taken out, if the pressure plate 7 is taken out from here, as shown in FIG. The pack case 3 made of resin and the pressure plate 7 made of metal can be separated very easily and safely.
[0019]
In addition, among the corners of the exposure opening, by forming two corners from the discharge port in an arc shape, the upper surface wall may be more smoothly broken along two sides of the exposure opening. Further, in the above embodiment, the sizes of the mounting hole, the opening, and the pin are given, but, of course, the size of each part is not limited to the described numerical values.
[0020]
In addition to the above-described embodiment, for example, as shown in FIG. 5, the mounting holes 31a and 31b of the pressure plate 30 may be formed in a U-shape with one end cut, and inserted into the pins 33a and 33b of the back plate 32. In this case, when the pressure plate 30 is removed from the back plate 32, the engagement between the back plate 32 and the pressure plate 30 can be released with a lighter force.
[0021]
Also, as shown in FIG. 5A, if a recess 44 is provided on the opposite side of the pin 43 of the back plate 42 that engages with the mounting hole 41 of the pressure plate 40, when the pressure plate 40 is removed from the back plate 42, As shown in FIG. 5B, the pin 43 is cut from the back plate 42 simply by pressing the concave portion 44 with a jig or the like, and the pressure plate 40 can be easily separated from the back plate 42.
[0022]
【The invention's effect】
As described above, according to the instant film pack case of the present invention, the exposed instant film is discharged to at least one of the top wall surface and the inner surface of the plastic instant film pack case. A groove for breaking the top wall is formed along two sides of the exposure opening extending in a direction orthogonal to the exit, and a pin which is thermally caulked after being inserted into the mounting hole of the pressure plate on the inner surface of the bottom wall and a reinforcing pin. By forming an opening for inserting a rod-shaped jig through the pressure plate while integrally forming the ridge and the hook, the tip of the jig inserted through this opening is hooked on the ridge, and the jig is tilted down as a fulcrum of the lever and operated. , since to be able to separate the plate from the bottom wall to break the thermal caulking pin whose, after the instant film is all discharged from the pack case, Pakkuke It is possible to provide a pack case for instant film, made available to easily separate the pressure plate from the scan.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a pack case for an instant film embodying the present invention.
FIG. 2 is a perspective view of the vicinity of a discharge port of the instant film pack case of FIG. 1;
FIG. 3 is a first half of an explanatory view showing a procedure for separating the pressure plate from the pack case in the instant film pack case of the present invention.
FIG. 4 is a second half of an explanatory view showing a procedure for separating the pressure plate from the pack case in the instant film pack case of the present invention.
FIG. 5 is a second embodiment of the instant film pack case of the present invention.
FIG. 6 is a third embodiment of the instant film pack case of the present invention.
FIG. 7 is an explanatory diagram showing pin sizes of a conventional pressure plate and a pressure plate of the present invention.
[Explanation of symbols]
2 Instant film pack 3 Pack case 7 Pressure plate 8 Exposure opening 11 Outlet 13 Clips 14a to 14d Slots 15a, 15b Cutout grooves 16a, 16b Pins 17a, 17b Mounting holes 18 Protrusions 19 Openings 20 Jig

Claims (2)

A box-shaped plastic instant film pack case for stacking and storing a plurality of mono-sheet type instant films, and a rectangular wall for exposing the uppermost instant film to the top wall. An exposure opening having a shape is formed, and a metal pressure plate that presses the stored instant film toward the upper surface is incorporated into the inner surface of the bottom wall, and one of the side walls is parallel to one side of the exposure opening. In the instant film pack case formed with a slit-like discharge port for discharging the exposed instant film,
Forming at least one of a surface of the upper surface wall and an inner surface along two sides of the exposure opening extending in a direction orthogonal to the discharge port, a groove for breaking the upper surface wall; A pin that is thermally caulked after being inserted into the mounting hole of the pressure plate and a reinforcing ridge are integrally formed on the inner surface of the pressure plate, and the pressure plate is provided with an opening through which a rod-shaped jig is inserted. An instant characterized in that the tip of the jig was hooked on the ridge and the jig was tilted down as a fulcrum of the lever to operate the jig, thereby breaking the thermally caulked pin and separating the pressure plate from the bottom wall. Pack case for film. 2. The instant film pack case according to claim 1, wherein a long hole extending from one end of each of the grooves toward the discharge port is formed in the top wall.

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