JPH09133957A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform close-up photographing and self-portrait photographing while keeping simple constitution. SOLUTION: A faced finder 20 consisting of a projected surface reflector is attached to the front of a film unit with a lens 10. A photographing lens 13 is constituted so that a focus set position may be within the subject distance of 0.8m to 1.2m. In the case a photographer performs self-portrait photographing, he holds the film unit 10 so as to turn it toward the photographer himself and performs framing so that the image of his own may be on the finder 20. By providing the finder 20 on the downside of the lens 13, the natural image is formed on photographic film without being influenced by the distorsion of the lens 13. The finder 20 is produced at low cost by performing press working to an ultra-high-gloss aluminum alloy plate having high reflectivity.

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 for performing close-up photography and self-portrait photography.

[0002]

2. Description of the Related Art A film unit with a lens is manufactured and sold by the present applicant so that photographers can easily enjoy photography at any time. The lens-fitted film unit is an unexposed photo film built into the unit body that incorporates a shooting mechanism such as a shooting lens and shutter device, so that you can take a picture immediately on the spot you purchased it, and also after shooting. It is widely used in general because it can be simply sent to a store that handles development.

Such a lens-fitted photo film unit has an advantage that it can be provided at a low price, and has a very simple structure because it needs to be manufactured at the lowest possible cost. For example, the photographing lens is positioned and held on a lens holder in which a diaphragm opening having a constant diameter is formed, and the focus setting position cannot be changed. For this reason, the lens-fitted film unit is set to focus so that shooting can be performed at more shooting opportunities, and when the depth of field is taken into consideration, the subject distance is 1 m.
It is configured to be able to shoot up to ∞.

Recently, not only is it possible to take pictures easily, but also while using a film unit with a lens,
There is an increasing demand for taking close-up subjects, such as taking portrait photos or taking close-ups of pets and plants. In order to meet such a demand, for example, in Japanese Unexamined Patent Publication No. 7-20553, an adapter for close-up photography having an auxiliary lens for shortening the focus setting position is configured, and this adapter is attached to the front surface of the photography lens. A lens-fitted film unit that enables close-up photography has been proposed.

[0005]

However, in the method of attaching the adapter to the lens-fitted film unit, both the lens-fitted film unit and the adapter must be purchased, which increases the cost burden on the photographer. In addition, carrying the lens-fitted film unit and the adapter separately is not only portable, but also because the adapter has to be attached and detached each time a photo is taken, it takes time to prepare for the photo shoot. Of course, it is possible to carry the lens-fitted photo film unit with the adapter attached, but in this case, the lens-equipped photo film unit becomes large in size, which is troublesome.

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 capable of easily performing close-up photography and self-portrait photography with a simple structure. And

[0007]

In order to achieve the above object, the lens-fitted film unit of the present invention is provided with a convex mirror-like reflective finder on the front surface thereof, and the focus setting position of the photographing lens is set to the object distance. 0.8
It is set within the range of m to 1.2 m. The reflection finder is preferably provided below the position of the taking lens, and it is preferable to press the ultra-high-gloss aluminum alloy plate to manufacture it, because it can be inexpensive.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the external appearance of a lens-fitted film unit of the present invention. Unit body 1
1 is mainly made of plastic and is entirely covered with an exterior body 12. The exterior body 12 is for making the appearance of the lens-fitted film unit 10 clean, and a paper box or the like having a printed outer surface is used. At a required portion of the outer body 12, a taking lens 13, a viewfinder objective window 1
4, strobe light emitting section 15, strobe charging switch 16,
Shutter button 17, winding knob 18, counter window 1
9, an opening for exposing the facing finder 20 and the like to the outside is provided, and a photographing operation can be performed with the exterior body 12 being covered with the unit main body 11.

As shown in the exploded view of FIG. 2, the unit main body 11 includes a main body base 21, a front cover 22 which covers the upper surface, front surface, and left and right side surfaces, and a rear surface of the main body base 21. And a rear cover 23. The viewfinder objective window 14, the strobe charging switch 16, and the shutter button 17 are integrally formed on the front cover 22, and the front view part has the facing viewfinder 20.
Is attached. A finder eyepiece window 24 is formed integrally with the rear cover 23. On the front surface of the main body base 21, on the shutter base 25a, the photographing lens 1
An exposure unit 25, which is a unitized assembly of a lens holder 26 holding the lens 3, a finder optical system, a shutter mechanism, and the like, and a strobe unit 27 are attached and sandwiched between a front cover 22 and a rear cover 23, respectively.

The facing finder 20 is composed of a convex reflecting plate, and is provided below the optical axis 13a of the taking lens 13. This facing finder 20 is preferable because it can be manufactured at low cost by pressing an ultra-high-gloss aluminum alloy plate having high reflectance, and for example, "SL XL" manufactured by Sumitomo Light Metal Industries, Ltd. may be used. . Alternatively, a convex plate may be formed using a synthetic resin such as polystyrene resin or acrylic resin, and a highly reflective metal such as aluminum may be vapor-deposited on the surface to form the reflective layer. Alternatively, the facing finder 20 can be formed by directly vapor-depositing a metal such as aluminum on the front cover 22.

An exposure frame 31 is provided in the central portion of the main body base 21, and the cartridge chamber 3 is sandwiched by the exposure frame 31.
2 and the film roll chamber 33 are integrally formed.
A cartridge main body 34 is housed in the cartridge chamber 32, and an unexposed photographic film 35 is housed in the film roll chamber 33 in a state of being completely pulled out from the cartridge main body 34. The bottoms of the cartridge chamber 32 and the film roll chamber 33 are open, and are closed by pull-top type lids 36a and 36b provided on the bottom side of the rear cover 23, respectively. Further, an aperture 37 for defining the exposure range of the photographic film 35 is formed on the back side of the exposure frame 31, and the exposure unit 25 is attached to this front side.

When the exposure unit 25 is attached to the main body base 21, as shown in FIG. 3, the exposure frame 31 of the main body base 21 is exposed.
And a dark box 39 provided integrally with the exposure unit 25 form a light blocking tube 40. An exposure opening 41 similar to the aperture 37 is formed on the front surface of the light shielding tube 40, and a rotatable shutter blade 42 and a taking lens 13 held by the lens holder 26 are formed on the front surface of the exposure opening 41. Are placed. The taking lens 13 has its focus set position set within a range of a subject distance of 0.8 m to 1.2 m, and when the depth of field is taken into consideration, shooting can be performed from a close range of a subject distance of 0.5 m. It is like this. A diaphragm opening 43 is formed in the lens holder 26 at a position corresponding to the exposure opening 41.
A taking lens 13 is placed and fixed so as to cover 3. Then, when the shutter button 17 is operated, the shutter device is activated and the shutter blade 42 causes the exposure opening 4 to move.
Open and close 1.

When a photograph is taken using the lens-fitted film unit 10 constructed as described above, the photographer
First, the winding knob 18 is rotated until it is locked, and it is confirmed that the preparation for photographing is completed and the shutter is charged. When the photographer performs self-portrait photography in which he or she captures himself / herself, the lens-fitted film unit 10 is directed toward himself / herself and the arm is extended. Then, while observing the facing finder 20, framing is performed so that the image of the subject is fit on the facing finder 20. At this time, since the facing finder 20 is formed of an ultra-high-gloss aluminum alloy plate having a high reflectance, the image of itself can be easily confirmed.

When the shutter button 17 is pressed, the shutter device is driven and the shutter blade 42 opens and closes the exposure opening 41, so that the image of the photographer is exposed on the photographic film 35 set on the back surface of the aperture 37. .
At this time, since the focus setting position of the photographing lens 13 is set close, the photographer's face, which is the main subject, is in focus, and a sharp image is formed on the photographic film 35. Also, the facing finder 20 is the photographing lens 1.
Since it is provided on the lower side with respect to the optical axis 13a of 3, the natural image is formed in the self-portrait photographing without being affected by the distortion of the photographing lens 13.

On the other hand, for example, when performing close-up photography of a flower, the photographer holds the lens-fitted film unit 10 at a position close to the flower. Then, when the user looks through the viewfinder eyepiece window 24 to perform framing and then presses the shutter button 17, a flower image is exposed on the photographic film 35. Even in this case, since the focus setting positions of the taking lens 13 are close to each other, the image of the flower at the close range is the same as that of the photographic film 3.
5 is sharply imaged.

When one shot is completed, the winding knob 18
Is rotated to wind the exposed portion of the photographic film 35 into the cartridge body 34. And photo film 3
When 5 is transferred by one frame, the rotation of the winding knob 18 is prohibited and the preparation for the next photographing is notified.

After that, the photographing operation and the film winding operation are repeated. When the winding knob 18 is rotated after the last frame of the photo film 35 is photographed, the entire photo film 35 is stored inside the cartridge main body 34, and "0" is displayed on the counter window 19 for displaying the number of remaining films. To be done. Then, bring the used film unit with lens 10 to a developing shop, and
If a PE is requested, development and printing are performed, and a portrait or close-up photograph and the developed negative film are returned to the photographer.

In the lens-fitted film unit of the present invention, the focus setting position of the photographing lens is set close, but general landscape photography can also be performed using this lens-fitted film unit. According to the experiments by the present inventors, by setting the focus setting position of the taking lens within the range of the subject distance of 0.8 m to 1.2 m, considering the depth of field, the subject distance of 0.5 m to 5. 0m
It has been confirmed that it is possible to shoot an object within the range. Therefore, even if general photography is performed using this lens-fitted film unit, there is practically no problem.

In the above embodiment, the case where only one lens is used as the taking lens has been described, but the taking lens may be configured by a lens group in which a plurality of lenses are combined. In this case, the focus set position of the lens group may be configured so that the subject distance is within the range of 0.8 m to 1.2 m.

Further, in the above-described embodiment, the reflection plate for the facing finder is attached to the front cover of the unit main body and is exposed to the outside through the opening provided in the exterior body, but it is directly exposed on the surface of the exterior body. A reflector may be attached. According to this embodiment, since it is not necessary to form an opening for exposing the reflection plate in the exterior body, the conventional exterior body can be used as it is, and the lens-fitted film unit can be manufactured more economically. be able to.

[0021]

As described above, according to the lens-fitted film unit of the present invention, the focus setting position of the photographing lens is set to the closest position within the range of the subject distance of 0.8 m to 1.2 m. Even when a flower, a pet or the like is photographed from a close range, a subject image can be sharply formed on the photographic film. Also, since a reflective finder is provided on the front of the lens-fitted film unit, you can aim this photographer-fitted film unit toward the photographer himself so that the photographer himself can be seen on the reflective finder. You can surely imprint yourself in the frame. Moreover, since the reflective viewfinder is arranged below the optical axis of the taking lens, a natural subject image can be formed on the photographic film without being affected by the distortion of the taking lens. become.

Further, since the focus setting position of the photographing lens is made close in advance and the reflection type finder is simply attached to the surface of the lens-fitted film unit, it is possible to easily carry out the close range without carrying any special equipment. A certain subject can be photographed, and further, the constituent members of the conventional lens-fitted film unit can be used as they are.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view of the unit main body shown in FIG.

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

[Explanation of symbols]

 10 Film Unit with Lens 11 Unit Body 12 Exterior Body 13 Photographic Lens 20 Face-to-Face Finder 35 Photo Film

Claims (3)

[Claims] 1. A lens-fitted film unit in which an unexposed photo film is stored in advance in a unit main body in which a shooting mechanism such as a shooting lens and a shutter device positioned and held on a lens holder is assembled, The lens-fitted film unit is characterized in that a convex mirror-like reflection finder is attached to the front surface and the focus setting position of the photographing lens is set within a subject distance of 0.8 m to 1.2 m. 2. The lens-fitted film unit according to claim 1, wherein the reflection finder is disposed below a position of the taking lens. 3. The lens-fitted film unit according to claim 1, wherein the reflection finder is formed by pressing an ultra-high gloss aluminum alloy plate.