JP2000147627A - Photographing unit and photographic film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a photographing unit which is thin, can increase the number of photographic frames even though it is small-sized and does not cause camera shake at the time of photographing and is excellent in handleability by constituting the unit, so that the optical axis vector of a photographing lens may orthogonal to the optical axis vector of a finder optical system. SOLUTION: A finder optical system 20 is arranged nearly at the center part of a housing 10, and light which is incident from an aperture 21 provided on a front surface housing unit 11 is detected with an eye in contact with an aperture 22 provided on a back housing unit 12 so as to decide a photographing frame. A half mirror 23 is arranged at the angle of 45 deg. with respect to the optical axis of the optical system 20, and the light made incident from the aperture 12 of the unit 11 is reflected and conducted to a photographing lens system 30. Therefore, the photographing unit is made thin, photographing is executed without causing the camera shake, the inside of the housing can be used wide, and photographing for many frames can be executed even though the unit is small-sized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a photographing unit and a photographic film.

[0002]

2. Description of the Related Art Currently, most compact cameras on the market use a roll film of 35 mm. The minimum thickness of the housing is determined by the width of the film to be loaded and the diameter of the cartridge. In addition, there is a problem of the focal length of the photographing lens system, and even if the housing can be designed thin, the photographing lens system has a shape protruding from the outer surface of the housing. It will be.

[0003] The above situation is the same in the case of a film with a lens.

A photographing unit (a so-called mini camera) using a roll film having a width of 16 mm has a screen size of 10 mm.
× 10mm, 10 × 14mm, 12 × 17mm, 13 ×
18mm, 13 × 21mm, etc., but nowadays so-called 110 film (width 16mm, screen size 13mm
× 17 mm) is standard. In the photographic unit using this type of film, the Mamiya 16 series manufactured by Mamiya Kokki Co., Ltd. was the beginning, and the photographic lens system can be arranged without protruding on the outer surface of the housing. However, since the film is housed in the cartridge, there is a limitation in reducing the thickness.

A photographing unit utilizing a so-called disc film has realized a considerably thinner film because the film is a single-leaf disc. However, the photographing lens system protrudes from the housing, and this projecting portion must be flattened. The cover is attached, and it is hard to say that the whole is ultra-thin.

Japanese Patent Laid-Open Publication No. Hei 10-62907 discloses a photographing unit in which one photographic film is loaded in a film channel provided so as to go around a housing. It is wound in the direction of the optical axis of the lens system, and has a configuration completely different from that of the present invention, in which an inner space created by winding and loading a photographic film is used as an arrangement position of the taking lens system.

[0007]

As described above, the use of commercially available 110 film has made the photographing unit considerably thin. However, the 110 film cartridge has a cartridge portion for accommodating an unexposed film. And a cartridge part for winding the exposed film and storing it in a light-shielded state is connected by a bridge, and occupies a large volume as compared with the number of photographed frames. In that the film is stored in a cartridge,
There is a limit in reducing the size and thickness of the photographing unit by using 10 films.

Further, it has been pointed out that a thin mini camera of the type using a commercially available 110 film has a drawback that camera shake easily occurs because the shutter is held horizontally and the shutter is pressed from top to bottom during shooting.

In view of the above, the present invention is thin and has no projection of the photographic lens system, can increase the number of frames to be taken irrespective of its small size, and is easy to use without causing camera shake during photographing. An object of the present invention is to identify a good photographing unit and a photographic film that is optimally used for the photographing unit.

[0010]

According to the present invention, there is provided a photographing unit in which an unexposed photographic film is loaded in a state capable of photographing in advance, wherein an optical axis vector of a photographing lens and an optical axis vector of a finder optical system are determined. Are orthogonal, that a mirror or prism that bends the optical path between the taking lens and the photographic film is arranged,
The photographic film loaded in the photographing unit is a roll film, the photographic film loaded in the photographing unit is an endless roll film, and the photographic film loaded in the photographing unit is a Mobius strip. , Respectively.

The photographic film according to the present invention is characterized in that an endless roll film is formed in a Mobius strip, and a photosensitive emulsion layer is coated on both sides of an opaque support. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a photographing unit according to the present invention will be described with reference to FIG. The housing 10 includes a front housing unit 11 and a rear housing unit 1.
The inner space is maintained in a light-shielding state by being integrated by joining the seals formed at the respective joint ends or joining the concave and convex portions. , A photographic lens system 30, a photographic film 40, and the like.

The finder optical system 20 includes the housing 1
0, and detects light incident from an opening 21 provided in the front housing unit 11 by eye contact with an opening 22 provided in the rear housing unit 12 to determine a photographing frame. I do. The light transmitted through the finder optical system 20 causes the photographic film 4
The finder optical system 20 itself is configured to have a light shielding structure, or the existing portion of the photographic film 40 is configured to have a light shielding structure so that 0 is not exposed.

The angle of the optical axis of the finder optical system 20 is 45 degrees.
The half mirror 23 is disposed at an angle of degrees, and reflects light incident from the opening 21 of the front housing unit 11 and guides the light to the photographic lens system 30. The half mirror 23 performs an escape operation from the optical axis of the finder optical system 20 during the finder operation, and rotates and stops at a predetermined position of the optical axis of the finder optical system 20 in conjunction with the operation of the shutter 31. After the shooting of the frame is completed,
The film returns to the original position according to the film winding operation.

The photographing lens system 30 guides the light reflected by the half mirror 23 to the photographic film 40 in the photographing room 41, and includes a focus mechanism, an aperture mechanism,
Including a shutter mechanism. The focus mechanism can be an automatic focus mechanism or a fixed focus mechanism. Similarly, the aperture mechanism and the shutter mechanism should be an automated exposure mechanism, a manual operation mechanism,
Various modes such as those having fixed exposure can be adopted. However, in order to provide the film at a low cost, a mode adopted in a currently available film with a lens is preferably applied.

The opening 22 of the finder optical system 20 does not need to be provided at a position corresponding to the opening 21 and can be arranged at any position of the rear housing unit if it does not hinder the arrangement of the photographic film 40. In this case, a mirror or a prism that guides light incident from the opening 21 of the front housing unit 11 to the finder optical system 20 is prepared.

Although not shown, it is also possible to adopt a configuration in which a strobe is installed to enable photographing at night or indoors.

The photographic film 40 housed in the inner space of the housing 10 in a light-shielded state is formed endless as shown in the figure, and is engaged with guides 13 to 16 provided in the rear housing unit 11. It is configured endless. All or some of the guides 13 to 16 may be configured as rotatable guide rollers, or may be configured as simple pillars having a circular or semicircular cross section.
In the latter embodiment, it is preferable to smooth the surfaces of the guides 13 to 16 by a fluororesin processing or the like so as not to cause scratches on the film surface.

The length of the photographic film 40 to be installed is
In addition to a mode in which the outer edges of the guides 13 to 16 are tied together,
By providing slack between the guides, it is possible to make it longer. In order to prevent malfunction due to the presence of this slack, a configuration may be adopted in which the photographic film 40 is meandering in a wavy manner by providing some intermediate guides.

The film feeding means 42 is, as shown in FIG.
In addition to the configuration in which the disk connected to one of the guide rollers 13 and 14 in the housing 10 is rotated, a configuration in which the disk is operated by a lever may be used. still,
This does not preclude the use of a mechanism that automatically feeds the film by incorporating a motor.

The photographic film 40 shown in FIG. 1 is of a normal type in which a photosensitive emulsion is coated on one side of a transparent support, and a photosensitive emulsion layer is provided on both sides of an opaque support. However, a configuration in which a Mobius strip is used instead of mere endlessness is also adopted. With this configuration, it is possible to make the image forming surface twice as long as the entire film length. In a type in which a photosensitive emulsion layer is coated on one side of a transparent support, image information is obtained by transmitted light after development processing, whereas a type in which a photosensitive emulsion layer is coated on both sides of an opaque support. Then, after development processing, image information is obtained by reflected light.

Except for the configuration in which the photographic film 40 is a Mobius strip, the photographic film 40 is cut at both ends.
The present invention includes a configuration in which a book is formed into a roll film. In such an embodiment, the photographic film 40 is loaded around the guides 13 to 16 in the same manner as shown in FIG. However, it is possible to feed the film.

The photographic film 40 used in the present invention comprises:
In order to make the imaging unit thinner, its width is 15
mm or less, but is not limited to this. Also, the number of frames to be shot is not a limiting factor.

The outer diameter of the photographing unit according to the present invention is
Long side 50-100mm, short side 30-70mm, thickness 8 ~
It is preferably about 18 mm.

The present invention also includes a mode in which the photographic film 40 is loaded in a state of being housed in a bag-shaped sheath in order to secure a light-shielding state. This sheath is used for the photographic film 4 in the photographing room and at the position where it engages with the film feed means.
0 is exposed.

[0026]

According to the present invention, the photographing unit can be compared with a conventional mini camera using 110 films.
It is possible to make it extremely thin, and it is also possible to take a picture while holding the picture taking unit in the vertical direction, and there is an advantage that the risk of causing camera shake, which is a drawback of the conventional mini camera, can be avoided. Further, the photographing unit according to the present invention is sold in a state in which the photographic film is loaded in the housing in a light-shielded state, and can be used for development processing without taking out the photographic film from the photographing unit after photographing. Since a cartridge for storing the film in a light-shielded state is not required, the inside of the housing of the photographing unit can be widely used, and a large number of frames can be photographed despite its small size. The above-mentioned problem can be solved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a photographing unit according to the present invention.

[Explanation of symbols]

 Reference Signs List 10-housing 11-front housing unit 12-rear housing unit 13-guide 14-guide 15-guide 16-guide 20-finder optical system 21-opening 22-opening 23-half mirror 30-photographing lens system 31-shutter 40- Photographic film 41-photographing room 42-film feeding means

Claims (6)

[Claims] 1. A photographing unit in which an unexposed photographic film is mounted in a photographable state in advance, wherein an optical axis vector of a photographing lens and an optical axis vector of a finder optical system are orthogonal to each other. 2. The photographing unit according to claim 1, wherein a mirror or a prism for bending an optical path is disposed between the photographing lens and the photographic film. 3. The photographic film loaded in the photographing unit is a roll film.
Or the imaging unit according to 2. 4. The photographing unit according to claim 1, wherein the photographic film loaded in the photographing unit is an endless roll film. 5. The photographing unit according to claim 1, wherein the photographic film loaded in the photographing unit has a Mobius strip configuration. 6. A photographic film characterized in that an endless roll film is formed in a Mobius strip, and a photosensitive emulsion layer is coated on both sides of an opaque support.