JPH06250337A - Film unit provided with lens - Google Patents

Abstract

PURPOSE:To provide a film unit provided with a lens capable of rapidly taking out a photographic film cartridge by facilitating the opening of the bottom cover of a cartridge chamber. CONSTITUTION:Engaging parts 20a and 20b engaging with engaging pawls 16a and 16b are respectively formed on both sides of the projecting part of a front cover 3. Notched parts 20c and 20d are respectively formed at the parts of the engaging parts 20a and 20b, and deformation of elastic deformation parts 20e and 20f is made easy. The pawls 16a and 16b are provided on the bottom cover 16. The tips of the pawls 16a and 16b are hook-shaped, and hooked and engaged with a projection (not shown in figure) inside the elastic deformation parts 20e and 20f of the engaging parts 20a and 20b.

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 lens-fitted photo film unit is a unit having a simple photo-taking mechanism and a pre-exposed photo film with a photo film cartridge built-in. It is easy to take a photo without carrying the camera. Therefore, the applicant of the present invention offers "Shaken Run Econo Shot" (trade name) etc. widely at a low price.

The cartridge chamber of such a lens-fitted photo film unit generally has an opening at the bottom, and the pawl chamber bottom lid engaging claw integrally formed with the rear cover and the front cover engaging portion. With the engagement with, the bottom cover of the cartridge chamber closes the opening, and the inside of the cartridge chamber is kept light-tight. And when taking out the photographic film cartridge from the cartridge room at the photo lab after shooting,
The engagement part of the front cover, which is engaged with the engaging claw of the bottom cover of the patrone chamber, is curved to release this engagement, and the bottom cover of the patrone chamber is opened to take out the photo film patrone housed in the patrone chamber. ing.

[0004]

By the way, one of the features of the lens-fitted film unit is that it is lightweight and thin. However, in the case of a lens-fitted photo film unit incorporating a standard 35 mm photo film cartridge, the size of the 35 mm photo film cartridge is restricted in terms of thinning. Based on the above-mentioned restrictions, in order to make the lens-fitted photo film unit a size that is easier to use, the front cover is projected forward along a part of the cylindrical cartridge chamber, and the thickness of other parts is reduced. Are being considered by the applicant.

However, as described above, in the case of the lens-fitted film unit of the type in which the front cover is projected forward so as to extend along a part of the cylindrical cartridge chamber, the shape near the engaging portion of the front cover is Part of the Patrone room is curved to form a curve. Therefore, when releasing the engagement between the engaging portion and the engaging claw of the bottom cover of the cartridge chamber, the engaging portion is unlikely to bend, and therefore, when the photographic film cartridge stored in the cartridge chamber is taken out, the cartridge chamber is removed. It was very difficult to open the bottom lid.

The present invention has been made to solve the above-mentioned problems, and in a lens-fitted film unit of the type in which a front cover is projected forward so as to extend along a part of a cylindrical cartridge chamber, the cartridge chamber bottom. An object of the present invention is to provide a lens-fitted photo film unit which facilitates opening of the lid and enables quick removal of a photo film patrone housed in a patrone chamber.

[0007]

In order to achieve the above object, the present invention forms a cut in the engaging portion of the front cover that engages with the engaging claw of the bottom cover of the cartridge chamber, and bends the engaging portion. By making it easy, the engagement between the engaging claw of the bottom cover of the cartridge chamber and the engaging portion of the front cover can be easily released.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an exploded perspective view of a lens-fitted film unit embodying the present invention. The unit main body 1 includes a main body 2 and front and rear covers 3 and 4 which are fixed to the front and rear by the main body 2.
The front cover 3 is provided with holes for exposing the taking lens 6, the number-of-images indicating plate 7 and the like, and a release button 8 is integrally provided. Further, a finder 9 for confirming the photographing range is formed on the upper part of the front cover-3. The main body 2 to which a photographing mechanism such as a shutter mechanism is attached has a patrone chamber 11 formed at an end thereof, and a photo film patrone 12 is accommodated therein. A bottom cover 16 is formed integrally with the rear cover-4, and after the rear cover-4 is covered on the back surface of the main body 2,
The bottom lid 16 is adapted to cover the bottom surface of the patrone chamber 11 in a light-tight manner.

FIG. 1 is a perspective view of the periphery of the bottom of the patrone chamber in the state where the bottom cover is opened in the lens-fitted photo film unit embodying the present invention. A patrone chamber 11 is formed at the end of the main body portion 2, and the front cover 3 is gently projected to the front surface along the cylindrical side surface of the patrone chamber 11. On both sides of the projecting portion of the front cover-3, engaging portions 20a, 2 engaging with engaging claws 16a, 16b described later are provided.
0b are formed respectively. Notches 20c and 20d are formed in parts of the engaging portions 20a and 20b, respectively, so that the elastically deforming portions 20e and 20f can be easily deformed.

Engaging claws 16a and 16b are provided on the bottom lid 16 which is integrally formed with the rear cover 4 after engaging with the main body 2. The ends of the engaging claws 16a and 16b are hook-shaped, and the elastic deforming portions 20e of the engaging portions 20a and 20b are
It engages with a protrusion (not shown) on the inside of 20f in a hooked manner. Further, a groove 25 is formed on the surface of the bottom lid 16 on the side of the cartridge chamber 11, and the groove 25 is fitted with a protrusion 24 provided around the opening of the cartridge chamber 11, The inside is kept light-tight. On the surface of the patrone chamber 11 side, a partially cut-out holding ring 26 for holding one end of the photographic film patrone 12 accommodated in the patrone chamber 11 is further projected.

The operation of the above configuration will be described. When the user is using the lens-fitted photo film unit, the ridges 2 projecting around the opening of the cartridge chamber 11
Since 4 is fitted into the groove 25 of the bottom lid 16, even if an impact such as a drop is applied to the lens-fitted photo film unit, the light tightness in the patrone chamber 11 is surely maintained. The photographic film patrone 12 will not be inadvertently exposed to light.

After the filming of the lens-fitted film unit is completed for all frames, the lens-fitted film unit sent to the developing station for printing has a part of an outer box (not shown) covering the unit main body 1 opened and cut. The bottom lid 16 is exposed. Next, the bottom cover 16 is opened, and the photograph film 12 which has been photographed is taken out from the cartridge chamber 11. At this time, the engaging portions 20a and 20b have cutout portions 20c and 20d, respectively. Since it is formed, the elastically deformable portions 20e and 20f are easily deformed, so that the engagement between the engagement claws 16a and 16b and the engagement portions 20a and 20b is easily released, and the bottom lid 16 can be easily broken. It can be quickly and quickly opened.

Further, since the holding ring 26 of the bottom lid 16 has a notch formed in a part thereof, when the photographic film patrone 12 is taken out of the patrone chamber 11, the holding ring 26 is attached to the holding film 26. -It can be taken out quickly without hitting the corner of the screw 12.

[0014]

As described above, according to the lens-fitted photo film unit of the present invention, since the engaging portions 20a, 20b are formed with the notches 20c, 20d, the elastically deforming portions 20e, 20f are easily formed. Is deformed into, and therefore the engaging claw 1
The engagement between the engaging portions 6a and 16b and the engaging portions 20a and 20b can be easily released, and the bottom cover 16 can be quickly opened without breaking it during development.

[Brief description of drawings]

FIG. 1 is a perspective view of the periphery of a bottom of a patrone chamber of a film unit with a lens embodying the present invention with a bottom lid opened.

FIG. 2 is an exploded perspective view of a lens-fitted film unit embodying the present invention.

[Explanation of symbols]

 3 Front Cover 11 Patrone Chamber 16 Bottom Lid 16a, b Engaging Claws 20a, b Engaging Part 20c, d Notch Part 20e, f Elastic Deformation Part 24 Projection Stitch 25 Groove 26 Retaining Ring

Claims (1)

[Claims] 1. A body part integrally formed with a patrone chamber accommodating a patrone and a film chamber accommodating a roll-shaped unexposed film, a front cover for covering a front surface of the body part, and the body. In a lens-fitted film unit having a rear cover integrally provided with a lid member that covers the rear surface of the section and covers the bottom surface of the cartridge chamber, a cylindrical projection that follows the outer wall of the cartridge chamber in a part of the cover. A locking portion that forms a portion and that locks the lid member at a closed position by engaging with a locking claw integrally provided on the lid member, and the locking portion A lens-fitted film unit, characterized in that a slit is formed in the vicinity of so that a part of the front cover is easily curved when the lid member is released.