JP3142092B2 - 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.

[0002]

2. Description of the Related Art A film unit with a lens is a unit body having a simple photographing mechanism in which an unexposed roll film with a patrone is built in advance, so that a photograph can be easily taken without carrying a camera. It can be carried out.
A 135-film patrone conforming to the ISO standard is used for the film unit with a lens. At the time of assembling, the film is pulled out from the patrone, assembled into a roll, and loaded into the patrone room and the film roll room, respectively. In use, when a film winding operation is performed every time a photograph is taken, the photographed film is sequentially wound into the cartridge.

Prior to loading a film and a patrone into the unit body, a film drawer is used to draw out the film from the patrone and put it into a roll. This device is provided with a patrone holding portion and a winding shaft for winding the film, and the leading end of the film coming out of the patrone is locked to the winding shaft, and then the winding shaft is driven. While pulling out the film, the film is wound up in a roll around a winding shaft.

[0004]

When the above-described film drawing device is used, the leading end of the film is easily bent by being locked to the winding shaft, and the center of the film roll has a curl. Easy to do. When such a film roll is loaded into the film roll chamber of the unit main body, even if the film roll is slightly loosened, the winding habit remains in the central portion, and when the shooting has progressed to a certain extent, this portion is removed. In some cases, the film may be stuck at the exit of the film roll chamber and cannot be smoothly pulled out.

FIG. 5 shows a state in which a considerable portion of the film 3 is wound around the cartridge 2 in the conventional film unit with lens. Although the film roll chamber 12 has a margin, the film roll 1 has a strong winding habit, so that it is not unwound in the film roll chamber 12, and when the film is wound up, it moves to the film outlet in the roll state. As a result, the film outlet is clogged by the film roll 1, and the film winding becomes heavy, and in a severe case, the film cannot be wound. Even if the film 3 can be forcibly pulled out, a strong bent portion remains at the leading end of the film due to the use of the above-described film drawing device. Therefore, as shown in FIG. As a result, the film 3 cannot be completely wound into the patrone 2.

The present invention has been made in view of the above-mentioned problems of the prior art. Even if a film roll has a slight curl in the center, the center of the film roll is directed toward the exit of the film roll chamber. And to provide a film unit with a lens that does not get caught at the exit of the film roll chamber.

[0007]

In order to achieve the above object, the present invention provides a unit body incorporating a photographing mechanism,
A patrone room accommodating a patrone and a film roll room accommodating a film drawn from the patrone in a roll form are provided. In a film unit with a lens from which a film is drawn out from a slit-shaped film outlet provided, a film at the film outlet is provided.
When the film is pulled out to one end in the film width direction
, The outside than the film perforation, and a sliding contact with the inside of the film roll in the film edge portion extending the curl of the film is provided, off except the edge portion
The other portion of the film exit that is in sliding contact with the film is formed in a round shape so that the film is not scratched.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a lens-fitted film unit embodying the present invention. The unit main body is composed of a main body part 4 and a front cover 5 and a rear cover 6 which are fixed to the front and back by a nail. The front cover 5 has a photographing lens 7, a finder 8,
Further, a hole for exposing the number-of-photographs display plate 9 and the like is provided, and a release button 10 is provided integrally. A body section 4 is provided with a patrone chamber 11 and a film roll chamber 12 at both ends, and accommodates therein a patrone 2 and a film roll 1 wound with a film 3 drawn from the patrone 2, respectively. Is done.

Bottom covers 13 and 20 are formed integrally with the rear cover 6, and after the rear cover 6 is placed on the back of the main body 4, the bottom cover 20 light-tightly covers the bottom of the cartridge chamber 11. Cover, bottom lid 13
Covers the bottom surface of the film roll chamber 12 in a light-tight manner. Bottom lid 13
A projection 14 is provided integrally at substantially the center of the film roll 12, and the projection 14 projects to the center of the film roll chamber 12 when the bottom cover 13 is closed.

FIG. 2 is an exploded perspective view mainly showing a film feeding portion of a film unit with a lens according to the present invention. When the winding knob 15 is turned, the fork 16 rotates, and the spool 17 meshed with the fork 16 rotates in conjunction therewith, so that the film 3 is wound up and the patrol
It gets caught in Ne2. At this time, the perforation 18 provided on the film 3 rotates the sprocket 19 to perform the shutter charging operation.

The operation of the above configuration will be described. At the time of assembling the film unit with the lens, the film roll 1 and the cartridge 2 are loaded in the axial direction from the bottom surface of the main body 4. When the winding shaft around which the film 3 is wound is pulled out of the film roll chamber 12, the film roll 1
Is loosened to some extent in the film roll chamber 12, and a space is formed in the central portion thereof. Thereafter, the rear cover 6 is assembled to the main body 4, and the bottoms of the cartridge chamber 11 and the film roll chamber 12 are light-tightly covered by the bottom covers 13 and 20, respectively.

When the bottom cover 13 covers the bottom surface of the film roll chamber 12, the projections 14 projecting from the inner surface of the bottom cover 13 are provided.
Enters the space formed in the central portion of the film roll 1. Further, when the front cover 1 is covered on the main body portion 4 and the projections 14 are provided integrally with the bottom cover 13 as in this embodiment, the projections 14 enter the space formed in the central portion of the film roll 1. To make it easier, it is better not to lengthen the length too much. However, when the bottom cover 13 is closed and the projection member is separately inserted from the bottom surface, the projection member is not more than the height of the film roll chamber 12. Anything should do.

When the thus-assembled film unit with lens is used, the winding knob 15 is operated each time a photograph is taken, so that the photographed film 3 can be used.
Is caught in Patrone 2. Therefore, the film 3 is gradually pulled out from the film roll chamber 12 as the photographing progresses. When the photographing has progressed to some extent, the film roll room 12 has an extra space as shown in FIG. However, since the projection 14 enters the central portion of the film roll 1, the film roll 1 does not move toward the exit of the film roll chamber 12 even when the film 3 is pulled out in such a state. Absent.

As shown in FIG. 3A, when there is a narrow tongue portion 3a above the end portion of the film 3,
When shooting winding film 3 ends has proceeded to the end portion, end portion of the film 3 is disengaged 1 4 or al protrusion moves toward the outlet of the film roll chamber 12.
Since a strong curl often remains in the tongue portion 3 a of the film 3, the curl tends to be caught at the exit of the film roll chamber 12.

To cope with this, FIGS. 3A and 3B
As shown in the above, at the upper end of the exit of the film roll chamber 12,
Film perforations not engage the position edge section 21 is a sharp corner (the range of about 1~2mm from the top)
Is provided. The edge portion 21, since the film 3 acts to extend the curl when going drawn from the film roll chamber 12, drawn it is eliminated outlet remains with curl is film end portion. Also, the outlet portion excluding the error <br/> Tsu di unit 21, good idea rounded as shown so as not entering an abrasion on the film 3.

[0016]

As described above, according to the film unit with lens of the present invention, the film width direction at the film outlet is
The one end portion, when the film Yuku drawn, outside than the film perforation, and in sliding contact with the inside of the film roll on the film provided with an edge portion extending the curl of the film, and the film except the edge portion
The other part of the film exit that slides is rounded so that the film does not get scratched, so even if there is a strong bend at the tongue at the film tip, extend this bent part without damaging the exposed surface. As a result, the leading end of the film can be reliably wound into the cartridge.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a lens-fitted film unit embodying the present invention.

FIG. 2 is an exploded perspective view of the rear side of the film unit with a lens shown in FIG.

FIG. 3 is a cross-sectional view of the vicinity of a film roll chamber of the film unit with a lens according to the present invention.

FIG. 4 is a cross-sectional view of a film feeding portion of the lens-fitted film unit embodying the present invention.

FIG. 5 is a sectional view of a film feeding portion of a conventional film unit with a lens.

FIG. 6 is a sectional view of a film feeding portion of a conventional film unit with a lens. (The film roll is stuck at the exit of the film roll chamber.)

[Explanation of symbols]

1 film roll 3 film 12 film roll chamber 14 protrusions 21 edge portion

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-37843 (JP, A) JP-A-63-201649 (JP, A) JP-A-5-100363 (JP, A) 81146 (JP, U) JP-A 3-105835 (JP, U) JP-A 63-128552 (JP, U) JP-A 4-50837 (JP, U)

Claims (1)

(57) [Claims] 1. A unit body incorporating a photographing mechanism is provided with a patrone chamber accommodating a patrone and a film roll chamber accommodating a film drawn from the patrone in a roll shape. with exposed film is caught in the cartridge, the film unit in which the film is pulled out from the slit-shaped film outlet provided in the film roll chamber, one end of the film width direction of the film outlet, fill-
When the beam Yuku drawn, outside than the film perforation, and from the inside of the film roll Huy
In sliding contact with Lum provided an edge portion extending the curl of the film, leaving the film contact film sliding outside the edge portion
A film unit with a lens, characterized in that the other part of the mouth is rounded so as not to scratch the film.