JPH1020451A - Photographic film for film unit equipped with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographic film for a film unit equipped with a lens, which can be easily pulled out of a cartridge at a developing laboratory. SOLUTION: A projection 38a projecting toward an emulsion surface is formed on the leading end part 31a of the photographic film 31, and the leading end part 31a is held so that it may float as high as the projection 38a above the back surface of the photographic film 31 wound on the lower layer. Thus, a gap is formed between the leading end part 31a and the surface of the film wound on the lower layer, then, in the case of inserting a film pulling thin plate 43 into the cartridge, the leading end of the thin plate 43 comes into the gap of itself, and the thin plate 43 is easily inserted in between the leading end part 31a of the photographic film 31 and the film surface on the lower layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film incorporated in a film unit with a lens.

[0002]

2. Description of the Related Art At present, various photographic films are used. For general photographing, an international standard (ISO 10) is used.
Photographic film cartridges of the 135 type specified in US Pat. No. 07-1979) are widely used. As shown in FIG. 7, a photographic film cartridge 1 is provided with a spool 3 rotatably provided inside a cylindrical patrone 2, and the end of a 35 mm-wide band-like photographic film 5 is fixed to the spool 3 and wound. The tip of the photographic film 5 is slightly pulled out from a film entrance 6 provided in the patrone 2 in order to facilitate the loading operation to the camera when not in use. After photographing, the photographic film 5 is rolled into the cartridge body 2 up to the leading end.

The photographed film 5 is taken out of the patrone 2 at a developing station, and is subjected to a printing process after being developed. When the photographic film 5 is pulled out from the patrone 2, two thin strips 8 and 9 are inserted through the film entrance 6.
The method is mainly used in which the thin film 8 or 9 is inserted and the leading end portion 5a of the photographic film 5 is sandwiched and pulled out.

Incidentally, a film unit with a lens is manufactured and sold by the present applicant so that photographing can be easily enjoyed at any time. A film unit with a lens is a unit with a simple shooting mechanism with a built-in unexposed photo film in advance. It is widely used because it is easy to put it out. In this lens-fitted photo film unit, the photo film is stored in a roll shape with all the photo films pulled out from the patrone. Each time a photograph is taken, the exposed portion of the photographic film is wrapped around the patrone. When photographing is performed on all the frames of the photographic film, the photographic film is stored in the patrone to the leading end.

When a user brings a used film unit with a lens to a developing dealer and requests a DPE, the film unit with a lens is collected at a developing laboratory, where a photographed film cartridge which has been photographed is taken out. Then, as in the case of the above-described general photo film cartridge, the photo film is pulled out from the cartridge and developed and printed.

[0006]

However, the photographic film incorporated in the film unit with the lens is
Until the user starts using the film unit with the lens, it is held in a state of being wound with the tip side in the center, so it is easy for the tip to have a strong winding habit, and when it is caught in the patrone In many cases, the leading end is in close contact with the film surface wound around the lower layer.
For this reason, it is difficult to insert a thin film drawer between the leading end of the photographic film and the film surface wound on the lower layer of the photographic film patrone taken out from the film unit with a lens. It took a lot of time.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a photographic film for a film unit with a lens, which can be easily pulled out of a patrone in a developing laboratory.

[0008]

In order to achieve the above object, a photographic film for a film unit with a lens according to the present invention has a projection formed on the leading end of the photographic film and projecting toward the emulsion surface, and this leading end is formed. When the film is wound into the patrone, a gap is formed between the film and the back surface of the photographic film wound thereunder. Also, at least a part of the leading end of the photographic film is bent toward the back surface side, and when the leading end is rolled into the patrone, the leading end rises from the back surface of the photographic film wound thereunder. You may do so.

[0009]

FIG. 2 shows an appearance of a film unit with a lens. The unit main body 11 is mainly formed of plastic, and is entirely covered with an exterior body 12. The exterior body 12 is used to clean the appearance of the film unit with lens 10, and a paper box or the like having a printed surface is used. A required part of the exterior body 12 includes a photographing lens 13, a finder objective window 14, a winding knob 15, a shutter button 16, and a counter window 17.
An opening is provided for exposing the external device and the like to the outside, and a photographing operation can be performed while the exterior body 12 is placed on the unit main body 11.

As shown in FIG. 3, the unit body 11 is
It comprises a main body base 21 and a front cover 22 and a rear cover 23 that cover the main body base 21 from front and rear. At the center of the front surface of the main body 21, an exposure unit 24, which is a unit formed by assembling the taking lens 13, a finder optical system, a film frame stopping mechanism, a shutter mechanism, and the like, is attached. Be pinched. An unused photo film cartridge 30 is stored in the main body base 21.

As shown in FIG. 4, the photographic film cartridge 30 comprises a strip-shaped photographic film 31 and a patrone 32 for storing the photographic film 31 in a light-tight manner. The patrone 32 is composed of a body plate 33 made of a thin metal plate rolled into a cylindrical shape, and a pair of caps 34a and 34b fitted to both ends thereof.
5 is provided rotatably. A film entrance 36 for allowing the photographic film 31 to enter and exit is formed at the joint of the body plate 33. The film entrance 36 is provided with a telem 37 37 for preventing outside light from entering the patrone 32 therefrom (see FIG. 1) is provided. The end of the photo film 31 is fixed to a spool 35, and the photo film 31 is wound around the spool 35 with the emulsion surface inside and the back surface outside. Projections 38a, 38 projecting toward the emulsion surface side are provided on the leading end 31a of the photographic film 31.
b is formed.

In FIG. 3, a patrone chamber 25 and a film roll chamber 26 are integrally formed in a main body base 21 so as to sandwich an exposure unit 24 assembled on the front surface thereof. The patrone room 25 accommodates a patrone 32, and the film roll room 26 accommodates a film roll 39 in which the photographic film 31 is entirely pulled out from the patrone 32 and formed into a roll. An aperture 27 for defining the exposure range of the photographic film 31 is formed on the rear side of the exposure unit 24 in the main body base 21.
When the rear cover 23 is put on the back surface of the main body base 21, a film passage 28 that connects the patrone chamber 25 and the film roll chamber 26 is formed by the gap between the main body base 21 and the rear cover 23.

The projections 38a, 3 of the photographic film 31
Reference numeral 8b denotes a case where the photographic film 31 is pulled out from the patrone 32 in the assembling process of the lens-fitted film unit 10 to form the film roll 39.
It is preferable to form the front end portion 31a by pressing. According to this, the film unit with lens 10
In the assembling process, a conventional photo film cartridge may be supplied, so that there is no need to provide a special manufacturing process for the photo film cartridge 30, and the film unit with lens 10 incorporating the photo film cartridge 30 can be economically manufactured. Can be manufactured.

The user can set the film unit 1 with a lens.
When all the frames of the photo film 31 are photographed using 0 and the winding knob 15 is rotated, the entire photo film 31 is wound into the cartridge 32. Then, when the user brings the used film unit with lens 10 to a developing dealer and requests a DPE, the film unit with lens 10 is further collected at the developing laboratory. At the developing station, the photographed film cartridge 30 which has been photographed is taken out of the unit main body 11 and transferred to a developing step. Further, the film unit with lens 10 after the photo film cartridge 30 is taken out is collected by a manufacturer and sent to a recycling process.

In the developing step, first, the photographic film 31 is pulled out from the cartridge 32. For example, a film drawer 40 shown in FIG. 5 is used for drawing the film. The film drawer 40 has a configuration in which a main body 41 is provided with two band-shaped thin plates 42 and 43 and a guide piece 44 for positioning. Knobs 45, 46 are fixed to one ends of the thin plates 42, 43, respectively.
By moving the 46, it is possible to move back and forth between a storage position stored in the main body 41 and a protruding position protruding from the main body 41.

At the start of drawing out the film, the thin plate 42,
43 is held in the storage position.
The respective distal end portions of the guide pieces 44 are inserted into the film entrance 36 of the cartridge 32. next,
As shown in FIG. 1 (A), the thin plate 42 is moved to the protruding position side, whereby the thin plate 42 is inserted inside the cartridge 32 along the inner wall. Next, the thin plate 43 is moved to the protruding position side, and the leading end 31a of the photo film 31 is moved.
And a film surface wound thereunder (see FIG. 1B). At this time, since the projections 38a and 38b projecting toward the emulsion surface side are formed on the leading end 31a of the photographic film 31, the leading end 31a is wrapped under the film regardless of the curl. It is held in a state of being floated from the surface by the height of the projections 38a and 38b. Therefore, a gap is formed between the leading end portion 31a and the film surface under the leading end portion 31a. Therefore, if the thin plate 43 is moved to the projecting position side, the leading end of the thin plate 43 naturally enters the gap, and the photographic film 31 It is easily inserted between the leading end portion 31a and the film surface under the leading end portion 31a.

Thereafter, when the two thin plates 42 and 43 are simultaneously pulled out from the film entrance 36, the leading end 31a of the photographic film 31 is sandwiched between the thin plates 42 and 43 and pulled out from the cartridge 32. Then, the photographic film 31 pulled out from the patrone 32 is subjected to a developing process and a printing process, and the printed photograph and the developed film are returned to the user via the developing dealer.

In the above embodiment, the projection is formed at the tip of the photographic film. However, in the present invention, it is sufficient that the tip can be lifted from the film surface under the photographic film. For example, the photographic film cartridge shown in FIG. As shown at 50, at least a part of the leading end of the photographic film 51 may be bent toward the back surface to form a folded piece 52. Also, the folded piece 52 is preferably formed by bending the leading end of the photographic film 51 when the photographic film cartridge 50 is incorporated into the film unit with a lens, so that the film unit with a lens can be economically manufactured.

[0019]

As described above, according to the photo film for a lens-fitted photo film unit of the present invention, a projection protruding toward the emulsion surface is formed at the front end of the photo film. Irrespective of the presence or absence of the photographic film, the photographic film is held in a state of being floated from the back surface of the photographic film wound thereunder by the height of the projection. Therefore, a gap is formed between the leading end and the film surface of the lower layer, so that the leading end of the thin film for drawing out the film naturally enters the gap, and the leading end of the photographic film and the film surface of the lower layer. It can be easily inserted between.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a photographic film cartridge embodying the present invention.

FIG. 2 is an external perspective view of a film unit with a lens.

FIG. 3 is a sectional view of a main part of the unit main body of FIG. 2;

FIG. 4 is a perspective view of a photo film cartridge.

FIG. 5 is an explanatory diagram showing a configuration of a film drawer.

FIG. 6 is a schematic diagram showing another example of the configuration of the photo film cartridge.

FIG. 7 is a schematic view showing a conventional photographic film cartridge.

[Explanation of symbols]

 1,30,50 Photo film patrone 2,32 Patrone 3,35 Spool 5,31,51 Photo film 5a, 31a Tip 6,36 Film entrance 8,9,42,43 Thin plate 10 Film unit with lens 11 Unit body 21 Main unit base 25 Patrone room 26 Film roll room 38a, 38b Projection 39 Film roll 40 Film drawer 52 Folded piece

Claims (2)

[Claims] When a film unit with a lens is manufactured, the film unit is housed in a roll shape in a film roll chamber formed in the unit body, and the end is locked to a spool of a patrone housed in the unit body to wind up the film for each photographing. In the photographic film for a lens-equipped film unit which is sequentially wound into the patrone from the end portion side, a projection protruding toward the emulsion surface is formed at the leading end of the photographic film, and the leading end is wrapped into the patrone. Wherein a gap is formed between the photographic film and the back surface of the photographic film wound thereunder. 2. A film is housed in a roll shape in a film roll chamber formed in a unit main body at the time of manufacturing a film unit with a lens, and the end portion is locked on a spool of a patrone stored in the unit main body to wind up the film for each photographing. In this case, at least a part of the leading end of the photographic film is bent toward the back surface side, and the leading end is entangled in the patrone. A photographic film for a lens-equipped film unit, wherein when the photographic film is wound, the leading end of the photographic film is raised from the back surface of the photographic film wound thereunder.