JPH0829922A - Film unit with lens - Google Patents

Abstract

PURPOSE:To provide a film unit with lens can prevent foreign substances from entering the inside of the unit main body without deteriorating the suitability for processing. CONSTITUTION:A cover part 60 whose outline is formed by a cut line 61 is installed in a position corresponding to a shutter button 17 in an upper face cover part 42 of a paper box. The cut line 61 is formed in the inside of the line of the outline of the shutter button 17 and formed discontinuously while leaving a joining part 62 formed in the shutter button 17 and a supporting part 63 formed on the hinge part 17a. The length of the joining part 62 is preferably set to be about 0.5mm, so that the part can be cut easily by pushing force at the time of pressing down the shutter button 17 from the cover part 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-fitted film unit in which a shutter mechanism is incorporated and a unit main body in which a film is preliminarily loaded is covered with an exterior box having an opening formed in a required portion.

[0002]

2. Description of the Related Art A lens-fitted film unit that is inexpensive and easy for anyone to use is widely sold by the applicant of the present invention so that photographers can easily enjoy taking pictures without having a camera. As shown in FIG. 5, the lens-fitted photo film unit 10 includes a unit body 11 in which a simple photographing mechanism and a photo film cartridge are incorporated,
It is composed of an outer paper box 12 that covers this. Paper box 1
The necessary parts of 2 are for exposing the taking lens 13, the finder window 14, the stroboscopic light emitting section 15, the strobe charging switch 16, the shutter button 17, the winding knob 18, and the film counter 19 provided in the unit main body 11, respectively. The openings 23 to 29 are formed so that the photographing operation can be performed while the unit main body 11 is covered with the paper box 12.

In such a lens-fitted film unit, a kick-off type shutter device is used for saving the number of parts and simplifying the structure. The shutter button 17 for driving the shutter device is provided on the upper wall of the unit main body 11. Is formed integrally with. As shown in FIG. 6, a hinge portion 17a is provided at one end of the shutter button 17, and a release arm 31 for inducing the drive of the shutter device is integrally formed on the lower surface thereof. Further, a cutout opening 32 is formed around the shutter button 17, and can be vertically swung with the hinge portion 17a as a fulcrum.
Then, when the shutter button 17 is pushed in, the release arm 31 moves to the right in the drawing to press the drive mechanism of the shutter device.

[0004]

On the other hand, the opening 27 formed in the paper box 12 is large so as to easily press the shutter button 17, and is formed around the shutter button 17 as shown in FIG. The cutout opening 32 is also exposed to the outside through the opening 27. However, since the shutter device is arranged below the shutter button 17, foreign matter such as dust may enter the unit main body 11 through the notch opening 32 and cause a problem in driving the shutter device.

In order to solve these problems, a lens-fitted film unit in which a lid is formed by a part of a paper box and the lid covers the shutter button is, for example, an actual flat sheet 3
It is known from Japanese Patent Publication No. -60343. However,
Since the contour portion of the lid, which has a hinge portion, is already cut at the stage of manufacturing the paper box material, the lid is opened during the assembly of the paper box and easily projects to the front surface side or the back surface side of the paper box. Therefore, in the manufacturing process of the lens-fitted photo film unit, the protruding lid part is caught, and the paper box is liable to be damaged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lens-fitted film unit which prevents foreign matter from entering the unit body without deteriorating processing suitability.

[0007]

In order to achieve the above object, the lens-fitted photo film unit of the present invention is bent at the time of pushing operation into a part of an exterior box which covers the shutter button formed on the unit body. With the hinge part remaining, the discontinuity that is broken by pressing or that does not penetrate the front and back of the outer box is made. Further, it is preferable that the cut line is formed inside the outline of the shutter button.

[0008]

FIG. 2 is an exploded view of a paper box used in the lens-fitted film unit of the present invention. The paper box 40 includes a back cover part 41, a top cover part 42, a front cover part 43, a bottom cover part 44, and left and right side cover parts 45 and 46 to wrap each surface of the box-shaped unit body 11. Has been done. In addition, the top surface cover portion 42, the bottom surface cover portion 44, and the left and right side surface cover portions 4
A glue margin piece 47 is connected to each of 5, and 46.

The front cover portion 43 has openings 51, 52,
53, 54 are formed, and the upper surface cover portion 4
2 and a pair of notches 55 are provided at positions that are boundaries with the bottom cover portion 44. Through the openings 51 to 54, the taking lens 13, the viewfinder objective window 14, the strobe light emitting unit 15, and the strobe charging switch 16 are exposed. The notch 55 is for curving the paper box 40 so as to follow the surface shape of the unit body 11 that is raised in a semi-cylindrical shape.

The rear cover portion 41 and the upper cover portion 4 are also provided.
2, openings 56 and 57 are formed, and a notch 58 is formed from the rear surface cover portion 41 to the upper surface cover portion 42. A finder eyepiece window (not shown) is exposed through the opening 56, a film counter 19 is exposed through the opening 57, and the winding knob 18 is projected through the notch 58.

Further, the upper cover portion 42 is provided with a lid portion 60 having a contour formed by a cut line 61 at a position corresponding to the shutter button 17 provided on the upper surface of the unit main body 11. As shown in FIG. 1, the cut line 61 is provided so as to be inside the contour line of the shutter button 17, and a joining portion 62 provided on the shutter button 17 and a support provided on the hinge portion 17a. It is formed discontinuously except for the portion 63. The joint 62 is
The length is preferably about 0.5 mm so that it can be easily broken by a small force.

In this paper box 40, the mountain fold line 48a shown by the one-dot chain line and the valley fold line 48b shown by the broken line in FIG.
Is bent along with and assembled into a box shape, and is bent in a semi-cylindrical shape so that the portion surrounded by the pair of notches 55 and the valley fold line 48b protrudes to the surface side. Then, after the unit main body 11 is housed inside, the glue margin piece 47 is glued. At this time, since the cut line 61 that forms the contour of the lid portion 60 is discontinuously formed at the joint portion 62, the lid portion 60 is opened unless the joint portion 62 is broken, and the top cover portion 42 is removed. It never rises. Therefore, in the assembly process of the lens-fitted film unit, the lid 60 is prevented from being caught or damaged, and the unit main body 11 is stored in the paper box 40 in a good condition.

First, the photographer performs a shutter charge by rotating the winding knob 18 counterclockwise until the rotation is locked. After this, framing the subject,
When the shutter button 17 is pushed in from above the lid portion 60, the joining portion 62 fixing the lid portion 60 to the upper surface cover portion 42 is broken by the pressing force. by this,
Since the lid portion 60 can swing up and down with the support portion 63 as a fulcrum, the shutter button 17 can be easily pushed thereafter. Then, when the shutter button 17 is continuously pushed in, the release arm 31 presses the drive mechanism of the shutter device, and the subject light is exposed on the photographic film.

When the photographing operation is completed and the photographer removes his / her finger from the lid portion 60, the elasticity of the hinge portion 17a connected to the shutter button 17 causes the shutter button 17 to reach the position of the upper wall of the unit main body 11. Will be returned. Along with this, the lid portion 60 is also pushed up to a position horizontal to the top cover portion 42, and the shutter button 17 is completely covered by the lid portion 60. This can prevent foreign matter from entering the unit main body 11 through the cutout opening 32. Moreover, since the contour line of the lid portion 60 is formed to be inside the contour line of the shutter button 17, the notch opening 32 formed around the shutter button 17 is completely covered by the upper surface cover portion 42. Be seen. Therefore, even if the lid 60 is opened to the outside while the lens-fitted photo film unit is being carried, foreign matter does not enter the unit main body 11 from here and the shutter device is always driven stably. Can be kept in a state.

In the above embodiment, an example in which the discontinuity portion of the cut line forming the contour of the lid portion is provided at only one place has been described. However, like the lid portion 70 shown in FIG.
Perforations 71 having a plurality of joints may be engraved on the contour portion. Further, like the lid portion 75 shown in FIG. 4, a shallow cut line 76 that does not penetrate to the other surface side may be formed on either the front surface side or the back surface side of the paper box.
According to this embodiment, the non-penetrating portion of the cut line 76 serves as a joint portion with the upper surface cover portion, so that the lid portion 75 is not opened until the lens-fitted film unit is used. In either case of the lids 70 and 75, it is preferable that the strength is small so that the joint portion is easily broken by the pressing force when the shutter button is pushed.

[0016]

As described above, according to the present invention, the lid portion which covers the shutter button is provided in a part of the paper box, and the contour line of the lid portion is formed to be smaller than the contour line of the shutter button. Therefore, the cutout opening formed around the shutter button is completely covered by the covering surface of the paper box. Therefore, foreign matter such as dust is prevented from entering the unit body through the notch opening, and the shutter device can be driven stably. In addition, the cut line that forms the contour of the lid is discontinuously formed, and the joint between the lid and the top cover is provided.Therefore, the lid should be open and protrude outward unless the joint is broken. Moreover, the processability of the lens-fitted film unit is not deteriorated.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part of a lens-fitted film unit of the present invention.

FIG. 2 is a development view of a paper box used in the lens-fitted film unit of the present invention.

FIG. 3 is a schematic view of a main part showing a second embodiment of the present invention.

FIG. 4 is a schematic view of a main part showing a third embodiment of the present invention.

FIG. 5 is a schematic view showing the structure of a conventional lens-fitted film unit.

6 is a schematic view of a main part of the unit main body shown in FIG.

7 is a schematic view of a main part of the lens-equipped film unit shown in FIG.

[Explanation of symbols]

 11 unit body 12,40 paper box 17 shutter button 17a hinge part 32 notch opening 42 upper surface cover part 60,70,75 lid part 61,76 cut line 62 joint part 63 support part 71 perforations

Claims (2)

[Claims] 1. A lens-fitted film unit in which a shutter mechanism is incorporated and a unit main body in which a film is preliminarily loaded is covered by an exterior box having an opening formed in a required portion, and a shutter button formed on the unit main body. A film with a lens, characterized in that a hinge part that is bent at the time of pushing operation is left in a part of the outer box that covers, and discontinuity that is broken by pressing or that does not penetrate the front and back of the outer box is inserted. unit. 2. The lens-fitted film unit according to claim 1, wherein the cut line is formed inside a contour line of the shutter button.