JPH0723781Y2 - Film pack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a film pack for storing an instant film unit.

[Conventional technology]

The mono-sheet type self-developing instant film unit (hereinafter simply referred to as film unit) is
A plurality of sheets are stacked and stored in a film pack. This film pack pushes up the last film unit in addition to the pack body with the exposure opening on the upper surface and the film unit discharge opening on the front surface, and the film unit at the top is on the inner wall of the upper surface of the pack body. A spring member for contacting is provided. If this spring member is not attached to the inner wall of the pack body but is simply stored in the pack body together with the film unit, when the final film unit is discharged from the film unit discharge port, the spring member also It may move together and its tip may enter the film unit outlet. In this case, the gap between the film unit discharge ports becomes narrow, and the film unit cannot be discharged.

In order to eliminate defective discharge of the film unit due to movement of the spring member, in the conventional film pack, the spring member is fixed to the inner wall of the pack body by adhesion or caulking, or described in JP-B-55-34409. As described above, a recess is formed in the inner wall of the bottom of the pack body to receive a part of the spring member.

[Problems to be solved by the device]

However, in the case where the spring member is bonded or caulked to the inner wall of the pack body, the manufacturing cost of the film pack is higher than that in the case where the spring member is simply put in the pack body. Also, in the case where the inner wall of the pack body is provided with a recessed portion so as to receive a part of the spring member, it is necessary to increase the thickness of the bottom surface of the pack body in order to form the recessed portion. This leads to an increase in cost. It should be noted that if the bottom of the pack body remains thin, the light-shielding ability will be reduced, causing fog on the film unit.

[Purpose of device]

An object of the present invention is to provide a film pack capable of preventing a defective discharge of a film unit due to a spring member without significantly increasing the manufacturing cost.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the film pack of the present invention, the discharge unit side end of the film unit supporting surface of the spring member is directed toward the opposite side of the spring member unit supporting surface so as to abut the inner wall of the front surface of the pack body. It is bent.

[Action]

In this invention, when ejecting the last film unit,
The spring member also moves along with this, but since the bent portion provided at the discharge port side tip of the film unit supporting surface contacts the inner wall of the front surface of the pack body, the movement of the spring member can be prevented.

〔Example〕

The structure of the present invention will be described with reference to FIG. 1 showing the external appearance of the film pack 1 and a part of the inside thereof, and FIG. 2 showing the film pack 1 in an exploded manner. The pack main body 2 has a box-like shape made of, for example, polystyrene resin (HIPS), and an upper surface 2a thereof has an exposure opening 8 and a notch 3 into which a scraping claw 21 (see FIG. 3) is inserted. It is provided. Further, a slit-shaped film unit discharge port 6 is formed on one side surface (hereinafter referred to as the front surface 2b) which is orthogonal to the upper surface 2a. The pack main body 2 contains a light-shielding lid 4, a plurality of film units 9, and a spring member 5 for pressing the film unit 9 from the back toward the exposure opening 8.

As shown in FIG. 2, the spring member 5 is composed of a flat film unit supporting surface 5a and a plurality of legs 5b.
A bent portion 5c is formed at a tip of the spring unit 5 on the discharge unit side of the film unit supporting surface 5a toward the opposite side of the film unit supporting surface 5a. This bending length is longer than the opening height of the film unit discharge port 6.
In FIG. 2, the outlet 6 is covered with the light shielding sheet 11. The spring member 5 is manufactured by forming cuts at an appropriate interval on a thin metal plate having a spring property and bending a portion between the two cuts at an angle.

The film pack 1 uses the front surface side including the front surface 2b as a lid,
The remaining portion may be a pack main body, and the lid may be integrally formed with the pack main body so that the lid is hinged, but it may be a two-piece type as shown in FIG. In this 2-piece type, the pack body has an exposure opening 8
A film pack box portion 30 having the above and a film pack lid 31 corresponding to the bottom surface 2c in FIG. When assembling the film pack, the light-shielding lid 4, the plurality of film units 9 and the spring member 5 are sequentially inserted into the film pack box portion 30 with the exposure opening 8 side down, and then the film unit discharge port 6
The light shielding sheet 11 is bonded to the.

The film pack 1 thus configured is loaded into the loading chamber 22 of the instant camera 20 as shown in FIG. When the back cover 23 is closed and the release button 24 is pushed in, the built-in motor is driven and the work of discharging the light-shielding cover 4 is started. First, the scraping claw 21 starts to push the rear end of the light-shielding cover 4 toward the film unit discharge port 6. This light shielding lid 4
By pressing, the light blocking of the light blocking sheet 11 blocking the film unit discharge port 6 is released. At the same time, the pair of unfolding rollers 25 start to rotate, and when the pushed out light blocking lid 4 reaches the unfolding roller 25, the light blocking lid 4 is sandwiched and transferred by the unfolding roller 25, and is discharged to the outside of the film pack 1. It The scraping claw 21 returns to its original position and stops when the shading lid 4 is transferred to the developing roller 25.
Is completely discharged to the outside of the film pack 1, the operation of the built-in motor is stopped, so that the developing roller 25 is also stopped. When the light shielding lid 4 is discharged, the first film unit 9 is pushed up to the exposure opening 8 by the spring member 5.

Next, when the release button 24 for photographing is pressed, the first film unit 9 is ejected as in the ejecting operation of the light-shielding lid 4 described above. When the film unit 9 of the final sheet is discharged, the spring member 5 that presses the film unit 9 toward the exposure opening 8 moves toward the film unit discharge port 6 together due to the frictional force with the film unit 9. Moving. However, as shown in FIG. 4, the bent portion 5c, which is longer than the opening height of the film unit discharge port 6, comes into contact with the inner wall of the front surface 2b of the pack body 2, so that the movement of the spring member 5 is stopped. Therefore, the tip of the film unit support surface 5a does not enter the film unit discharge port 6, and only the film unit 9 is discharged to the outside through the film unit discharge port 6.

[Effect of device]

As described above, according to the film pack of the present invention, the spring member that presses the film unit toward the exposure opening is bent at the tip of the film unit supporting surface on the discharge port side in the direction opposite to the film unit supporting surface. Since the bent portion is formed in contact with the inner wall of the front surface of the pack body so that the movement of the spring member is restricted, the movement of the spring member that prevents the discharge of the last film unit is prevented. Therefore, it is possible to reliably prevent the occurrence of defective film unit discharge.
And, even as a structure for obtaining the above function, the pack body itself does not require any modification, and only one end thereof needs to be bent at the same time when the spring member is pressed,
There is almost no increase in the manufacturing cost of the film pack.

[Brief description of drawings]

FIG. 1 shows an embodiment of the film pack of the present invention, and is a perspective view of a part of the pack body. FIG. 2 is an exploded perspective view of a two-piece type film pack. FIG. 3 is a side sectional view of an instant camera loaded with the film pack shown in FIG. FIG. 4 is an explanatory view of the operation of the film pack using the present invention. 1 ... Film pack, 2 ... Pack body 5 ... Spring member 5a ... Film unit supporting surface 5b ... Legs, 5c ... Bending section 6 ... Film unit discharge port 8 ... Exposure opening 9 ... Film unit

Claims (1)

[Scope of utility model registration request] 1. A pack main body for accommodating a plurality of film units in a stacked manner, and a spring member built in the pack main body for pressing the plurality of film units toward the upper surface of the pack main body in which an exposure opening is formed. And a slit-shaped film unit discharge opening whose opening height is slightly larger than the thickness of one film unit is formed on one side surface that is orthogonal to the upper surface, and is exposed through this film unit discharge opening. In a film pack in which a film unit is discharged, the spring member is formed from a film unit supporting surface that is in contact with the lowermost layer of the laminated film units, and an elastic leg portion that presses the supporting surface against the upper surface of the pack body. In addition, the film unit supporting surface is bent at the end of the film unit discharge side to the leg side. A bent portion whose length is larger than the opening height of the film unit discharge port is formed, and when the spring member moves to the film unit discharge port side, the bent portion contacts the inner wall of the one side surface. And a film pack.