JP3070886B2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens, and more particularly, to an improvement in light shielding of a film unit with a lens.

[0002]

2. Description of the Related Art In a film unit with a lens sold by the applicant of the present invention (trade name "Photo Run Hi"), a front cover, a main body, and a rear of a unit main body are formed in order to reduce manufacturing costs. A resin molded product is used for the cover, and an unexposed film is built in the cover in advance.
A simple shooting mechanism is assembled. In this film unit with a lens, the exposed film is wrapped around the patrone for each photographing, and when the prescribed photographing is completed,
All films are stored in the patrone. Thereafter, the user may submit each unit body to the developing laboratory without taking out the patrone.

[0003] The removal of the patrone is performed in a developing laboratory by opening a patrone removal cover formed integrally with the rear cover. In the film unit with lens,
In order to easily perform the take-out operation, the patrone take-out cover is provided on the rear cover via a hinge so as to be freely bent.

[0004]

However, if the hinge portion is made too thin to make it easy to bend the patrone take-out lid, the external light passes through the resin and the film built in the main body portion is exposed. There was a problem that the thickness of the hinge portion could not be reduced because of the fear. When the patrone take-out lid is bent without thinning the hinge part, the inside of the bent part may not be aligned as shown in FIG. When external light enters the main body through the gap, there is a problem that the film is exposed.

In order to solve such a problem, a pair of tapered surfaces 50a and 50a are formed on the hinge 50 as shown in FIG.
In the film unit with the lens formed with b, the inside of the bent portion is aligned when bent, but when the center portion of the hinge portion 50 bulges from both ends when the rear cover 51 is formed, the patrone When the take-out lid 52 is bent, there arises a problem that the ends of the hinge portion 50 cannot be brought into close contact as shown in FIG. 8B. For this reason, in this film unit with a lens, there is a risk that external light may enter from the end of the hinge portion and the film contained in the main body may be exposed.

The present invention has been made in view of the above circumstances,
It is an object of the present invention to provide a lens-fitted film unit capable of reliably performing light shielding at an end of a hinge.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, when the light-shielding lid is bent to the closed position, the lid is folded along the end face of the hinge portion. The ridge formed at the end of the surface is brought into close contact with the opposing folded surface, so that light is blocked at the end of the hinge portion. According to the second aspect of the present invention, at the end of the hinge portion, a concave portion and a projecting portion that are fitted to each other when the light-shielding lid is bent to the closed position are formed, and these are fitted. Thus, light is blocked at the end of the hinge. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0008]

FIG. 4 shows a film unit with a lens (hereinafter simply referred to as a film unit) embodying the present invention. The film unit 2 is composed of a unit main body 3 having a photographing mechanism and a paper box 4 for housing the same. Photographing is performed while the film is stored in the paper box 4. For this reason, the paper box 4 has a photographic lens 5, a release button 6,
Film counter 7, finder 8, and winding knob 9
There is an opening for exposing.

In FIG. 3, which shows the unit body 3 in an exploded state, the unit body 3 is composed of a body portion 11 and a front cover 12 and a rear cover 13 which are nailed before and after the body portion.
These are each integrally formed of plastic.
At the center of the main body 11, a photographing lens 5, a shutter blade 14, a film winding mechanism, and the like are attached.
On both sides, a patrone chamber 15 and a film roll chamber 16 are provided.
Are formed. A patrone 17 is stored in the patrone chamber 15, and a roll-shaped unexposed film 18 drawn from the patrone 17 is stored in the film roll chamber 16.
Are respectively loaded.

The rear cover 13 is claw-fixed to the rear surface of the main body 11 via locking claws (not shown).
Is shaded. Thereafter, the cover 13 includes a back portion 20, a bottom portion 21, a patrone take-out cover 22 and a bottom cover 23. The bottom portion 21 is fixed to the back portion 20, whereas the patrone take-out cover 22 and the bottom cover are provided. Numeral 23 is provided on the back surface portion 20 via thinned hinge portions 24 and 25 so as to be freely bent. The patrone take-out lid 22 is normally locked to the front cover 12 via a pair of locking claws 26a and 26b to shield the patrone chamber 15 from light and to remove the patrone 17 from the patrone chamber 15 at the developing station. Be released. The bottom cover 23 is opened when the film 18 is loaded at the factory, and is locked to the front cover 12 by locking claws (not shown) after the loading is completed.

FIG. 2 is an enlarged view of one end of the hinge portion formed between the back surface and the patrone take-out cover. The hinge portion 24 is formed at a V-shaped groove 30 formed to reduce the thickness, a pair of tapered surfaces 31 and 32 formed at the V-shaped groove 30, and at an end of the tapered surface 31. And a light-shielding projection 33 having a width D and a height H. The projection 33 is also formed on the other end of the hinge 24.

The length of the height H is, for example, 0.05 to 0.
When it is set in the range of 2 mm, the close contact between the tapered surface 32 and the projection 33 can be maintained irrespective of the bending angle when the patrone take-out lid 22 is nailed to the front cover 12. Further, when the length of the width D is set in a range of, for example, 1 to 3 mm, light shielding properties can be secured from the end of the hinge portion 24 for external light. Although similar protrusions are formed on both ends of the hinge portion 25, the operation and effect are the same as those of the protrusion 33, and therefore description thereof will be omitted.

The operation of the thus configured film unit will be described below. At the manufacturing factory, the photographing lens 5, shutter blades 14, film winding mechanism, and the like are incorporated into the main body 11, and the front cover 12 is clawed. Then, the patrone 17 and the roll-shaped film 18 are loaded into the patrone chamber 15 and the film chamber 16, respectively, and the back portion 20 is nailed to the main body 11.

Thereafter, as shown in FIG. 1, the patrone take-out lid 22 is bent so as to be at a right angle to the back surface portion 20, and is nailed to the front cover 12 via a pair of locking claws 26a, 26b. . After the bottom cover 23 is bent in the same manner, the bottom cover 23 is claw-fixed to the front cover 12 via a not-shown locking claw. Thus, the assembly of the unit main body 3 is completed, and the film 18 is shielded from light while being stored between the main body 11 and the rear cover 13.

By the way, when the patrone take-out cover 22 is bent so as to be perpendicular to the back surface portion 20,
First, the protrusions 33 at both ends of the hinge portion 24 are pressed against the tapered surface 32 and are brought into close contact with each other. Therefore, external light does not enter the patrone chamber 15 from both ends of the hinge portion 24. Also, when the bottom cover 23 is nailed to the front cover 12, the same light shielding is performed at both ends of the hinge portion 25. The unit main body 3 is loaded in a paper box 4 and completed as a film unit 2.

FIG. 5 is an enlarged view of one end of a hinge portion embodying the present invention. In the film unit of this embodiment, a concave portion 40 and a convex portion 41 fitted into the concave portion 40 are formed at one end of the hinge portion 24. In the film unit configured as described above, the patrone take-out cover 22 is attached to the front cover 12 by the locking claws 26a, 2a.
When locked via 6b, as shown in FIG.
The protrusion 41 fits into the recess 40. Therefore, external light does not enter the cartridge chamber 15 from both ends of the hinge portion 24.

In this embodiment, the hinge portion of the normal type film unit has been described. However, other film units such as a telephoto type, a panorama type, a close-up type, and a disposable camera having a built-in prewind shaft and a disposable type camera can be used. The present invention can be applied to a camera having a thin hinge portion used in a disposable camera incorporating a double patrone.

[0018]

As described above in detail, according to the first aspect of the present invention, when the light-shielding lid is bent to the closed position, the light-shielding lid is bent along the end surface of the hinge portion along the end surface of the hinge portion. Since the formed ridge is brought into close contact with the opposing folded surface, light shielding at the end of the hinge can be reliably performed. According to the second aspect of the present invention, since the concave portion and the projecting portion that are fitted to each other when the light-shielding lid is bent to the closed position are formed at the ends of the hinge portion, respectively, they are fitted. Thus, light shielding at the end of the hinge portion can be ensured.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state of a hinge portion when a patrone take-out lid is nailed to a front cover.

FIG. 2 is an enlarged perspective view showing a main part of a hinge part.

FIG. 3 is an exploded perspective view showing a unit main body.

FIG. 4 is a perspective view showing the appearance of the film unit.

FIG. 5 is a perspective view showing a main part of a hinge having a shape different from that of FIG. 2;

FIG. 6 is an explanatory view showing a state of the hinge portion shown in FIG. 5 when the patrone take-out lid is nailed to the front cover.

FIG. 7 is a partially enlarged perspective view showing a hinge portion formed in a conventional film unit.

FIG. 8 is an explanatory view showing a gap generated at an end of a hinge portion in the conventional film unit due to a stopper of a patrone take-out lid.

[Explanation of symbols]

 2 Film unit 5 Photographing lens 11 Main body 13 Rear cover 17 Patrone 18 Film 22 Patrone take-out cover 24, 25, 50 Hinge 31, 32, 50a, 50b Tapered surface 33 Protrusion 40 Recess 41 Convex

Claims (2)

(57) [Claims] 1. A main body for storing an unexposed film with a patrone, including a photographing mechanism such as a photographing lens and a shutter, a rectangular rear cover mounted on the main body and shielding the film, and a pair of folded surfaces. A film unit with a lens, which is integrally formed with the rear cover through a hinge portion, and has a light-shielding lid that can be bent between a closed position and an open position, wherein the light-shielding lid is in a closed position. When bent, a ridge formed at the end of the folded surface is brought into close contact with the opposing folded surface so as to be along the end surface of the hinge portion, so that light is shielded at the end of the hinge portion. A film unit with a lens. 2. A main body for storing an unexposed film with a patrone and having a photographing mechanism such as a photographing lens and a shutter, a rectangular rear cover mounted on the main body and shielding the photographic film from light, A lens-equipped film unit comprising a cover and a light-shielding lid which is integrally formed of resin via a hinge portion and which can be bent between a closed position and an open position, wherein a light-shielding portion is provided at an end of the hinge portion. A concave portion and a protruding portion which are fitted to each other when the lid is bent to the closed position are formed, and light is shielded at the end of the hinge portion by fitting them. Film unit with lens.