JP2842315B2 - Film camera - 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 camera in which the effective photographing area of a film is enlarged.

[0002]

2. Description of the Related Art Currently, 35 mm film for general photography (System 135) is JIS or IS.
O and the like.

FIG. 12 shows a part of the prescribed size (the tolerance is omitted). The width of the film 1 is 35 mm, the facing distance of the perforation 2 for feeding the film is 25 mm, and the width of the perforation 2 is 25 mm. The pitch is 4.75 mm. Then, for such a film 1, the frame 3 is 24 m in the width direction of the film 1.
m, and is formed in a rectangular shape having a size of 36 mm in the length direction, and the pitch of the pieces 3 is 38 mm, which is eight times the pitch of the perforations 2 as a reference.

At present, the photographic film generally widely used is the above-mentioned 35 mm film. As a method of improving the image quality, particularly the resolution, of the film 1, the photosensitive agent applied to the i-film is improved. ii Increase the width of the film to make the pieces larger. Can be considered.

[0005]

However, in general, the fineness of the particles of the photosensitive agent, that is, the resolution, is inversely proportional to the film sensitivity. Therefore, unless a new photosensitive agent is discovered, the image quality can be improved by the i-term. It is difficult. In this regard, according to the method of item ii, the image quality can be improved with the current photosensitizer, but the increase in the width of the film 1 results in an increase in size and weight of the camera. Does not match the current trend of miniaturization and weight reduction.

[0006] The perforations 2 are through holes provided on both sides of the film 1.
The film 1 is fed by driving the sprocket of the camera, and the feed amount of the film 1 is determined by the rotation amount of the sprocket. Therefore, the perforation 2 is indispensable for the film 1 and the camera.

[0007] However, when the perforations 2 are present, when data such as the photographing date and time is imprinted on the film 1, the data is imprinted in the positions shown in FIGS.

That is, FIG. 1A shows a case where the data 4 is printed inside the frame 3, which is widely practiced by a general compact camera or the like, and can imprint the shooting date on printed photographic paper. However, it is not suitable for enthusiasts or professional photographers.

FIG. 1B shows a case where data 4 is printed between frames 3 and 3. In this case, when a slide is made, the film 1 is placed at the position of data 4.
Would be inconvenient because it would be necessary to cut the slide frame. Further, even in the case of a negative film, it is necessary to keep the film 1 long at the time of DPE and at the time of storage. Further, at the time of printing, the data 4 cannot be imprinted on the photographic paper. Even if the data 4 can be printed, when the frame 3 is photographed so as to be horizontally long, the characters indicating the data 4 lie horizontally. It becomes unnatural.

Further, FIG. 1C shows a case where the data 4 is printed so as to straddle the frame 3 and its outer frame on the perforation 2 side, but the data 4 is printed when printing on photographic paper. It is still inconvenient when there are no slides.

[0011]

SUMMARY OF THE INVENTION The present invention is a film in which a patrone storage section, a film storage section, and a through hole for driving a sprocket are eliminated, and a photographing area formed near a first edge of the film. Means for winding a film having a through hole indicating a frame position between the patrone storage section and the film storage section, detection means for optically detecting the through hole of the film, and exposing the photographable area of the film An exposing means, and a non-porous second face opposing the position near the first edge adjacent to the frame exposed by the exposing means.
Photographing information recording means for recording photographing information at a position near the edge, wherein the photographing information recording means records from the other side opposite to one side of the film exposed by the exposing means. Things. According to the present invention, the frame position of the photographing area in which the film in which the sprocket driving through hole formed in the conventional film edge is eliminated and the effective photographing area can be enlarged is formed near the first edge is shown.
The film can be rolled up well using
Since the shadow information is recorded near the non-porous second edge from the other side facing the one side of the film exposed by the exposure means, this photographic information can be recorded without interfering with the exposure of the camera.

That is, in this case, the camera is not increased in size and weight. In addition, the equipment such as the current film manufacturing equipment and the processing equipment of the photographed film can be utilized as it is, and the present equipment can be used in combination with the equipment for the current 35 mm film. For example, a device that cuts a wide film coated with a photosensitizer into a width of 35 mm, a standardized patrone manufacturing device, or a device that winds a cut film into the patrone is automated and becomes a large-scale facility. However, these facilities can be used as they are.

Further, the processes after photographing, that is, the processes of developing, printing, and stretching are also automated, and all the processing devices are designed on the basis that the width of the film is 35 mm. Changing is impractical.

Thus, the width of the film is
It is practical to improve the image quality by setting it to 35 mm, which is equal to the mm film.

By the way, the current 35 mm film has a width of 35 mm, but the length of the frame in the width direction is 24 mm, and the effective photographing area is narrow.
This is because the perforations 2 for the sprocket of the camera to feed the film are provided on both sides of the film.

On the other hand, with the advance of computerization in cameras, drive control by a motor can be performed with considerable accuracy.
Experiments have confirmed that the film can be driven with sufficient accuracy without using a conventional large sprocket and perforation 2.

Therefore, the perforations 2 are removed from the 35 mm wide film 1, and the length of the frame in the film width direction is increased to the position where the perforations 2 are located. That is, by doing so, the substantial effective photographing area can be enlarged by about 40%, and accordingly, the image quality can be improved accordingly.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a film camera according to the present invention.

In this example, as shown in FIG. 7A, the width of the film 1 is 35 mm, which is equal to the current film width, and no perforation is provided. The length of the frame 3 in the film width direction and the length in the film length direction of the frame 3 as the effective shooting area are 30 mm and 40 mm.
And Further, the pitch of the piece 3, that is, the film 1
Is 42.0 mm.

However, the size and pitch of this piece 3 are
This is for the current television broadcasting system, and therefore, the aspect ratio of the frame 3 is 3: 4.

When dealing with HDTV (so-called high-vision), the size of the frame 3 is 30 mm × 53.3 mm and the pitch is 57.7, as shown in FIG.
5 mm. Note that the aspect ratio is 9:16.

Further, the above numerical values are for the full size, and for the half size, as shown in FIGS. C and D, the size of the frame 3 is 30 mm × 22. 5mm, pitch 26.2mm, HD
In the case of TV, the size of the piece 3 is 30 mm × 16.9 mm,
The pitch is 21.0 mm.

The film 1 having the above-mentioned format is housed in a cartridge (cartridge) similar to the existing 35 mm film, though not shown.

Therefore, if the length of the frame 3 in the film width direction is 30 mm as shown in FIGS.
Since this is 1.25 times the current length of 24 mm in the film width direction of a 35 mm film, the image quality (resolution) is improved by 25%.

If the length of the frame 3 in the film length direction is also enlarged at the same ratio, 1.25 ×
1.25 ≒ 1.56, which is a 56% improvement in image quality. Further, comparing the area per frame, the current is: 24 mm × 36 mm = 864 mm ² FIG. 7A: 30 mm × 40 mm = 1200 mm ² , the area of one frame increases by about 39%, that is, about 39%. The image quality is improved. Furthermore, if the image quality is the same, the image can be enlarged even more.

As shown in FIGS. 3C and 3D, even in the case of the half size, the long side of the frame 3 is close to the current full size width of 36 mm in the film length direction, so that the image quality close to the full size is obtained. Obtainable.

Further, since the length of the frame 3 in the film width direction is 30 mm, a non-photographing area of 2.5 mm can be obtained between the frame 3 and both edges of the film 1. It is possible to secure the flatness of the film 1 at the time of photographing, control the film 1, or read and write data. Further, since it is not necessary to provide a sprocket for film feeding in the camera, the camera can be reduced in size and weight.

Further, when feeding the film 1, the film 1
Since there is no perforation, the feed amount of the film 1 is detected by, for example, a detection roller adjacent to the film 1. If the pitch of the frame 3 is the above value, these values are 42.0 mm. = 5.25 mm × 8 57.75 mm = 5.25 mm × 11 26.25 mm = 5.25 mm × 5 21.0 mm = 5.25 mm × 4, all being integral multiples of 5.25 mm, and 5.25 mm = Π × 3.34 mm / 2.

Therefore, the feed amount of the film 1 can be determined by setting the diameter of the detection roller to 3.34 mm and detecting an integer number of rotations. The detection means can be simplified.

FIG. 8 shows another example of the pitch of the piece 3. In the case of this pitch, 44.0 mm = 6.28 mm × 7 56.5 mm = 6.28 mm × 9 25.1 mm = 6.28 mm × 4 18.8 mm = 6.28 mm × 3 6.28 mm = π × 4.00 mm / 2, and the number of rotations of the detection roller becomes an integer number of times.
The resolution also becomes 1/2 rotation.

FIG. 9 shows a case where a small hole 6 is provided in the film 1 for detecting the feed amount of the film 1. That is, in the format shown in FIG. 7, as shown in FIG. 9A, on a line 1.25 mm from one edge of the film 1,
That is, 5.25 mm on the line between the edge, the piece 3 and the center.
The small holes 6 having a diameter of, for example, 1 mm are provided at the pitch. Similarly, in the format shown in FIG. 8, small holes 6 are provided at a pitch of 6.28 mm as shown in FIG. 9B.

Since the pitches of 5.25 mm and 6.28 mm of these small holes 6 are determined based on the above-mentioned grounds, they can be used for current television broadcasting and HDTV, and can be used in both full size and half size. Can respond. That is, when the film is fed, the number of the small holes 6 is counted by a photo interrupter or the like using infrared light. Thus, a piece 3 is formed.

FIG. 3 is a partial cross-sectional view of an example of a camera according to the present invention, in which a plane parallel to a bottom surface in a dark box portion of the camera is a cross section. FIG. 4 is a rear view with the back cover removed.

The center of the body 11 is a dark box 12, and a lens 13 is provided in an opening in front of the box.
Further, one inside part of the body 11, the left side in the figure, is a patrone storage part 14, and a film supply shaft 15
The patrone 5 containing the above-described film 1 is set so as to be fitted to the supply shaft 15 at the time of photographing.

Further, a film winding shaft 16 is provided on the other inner side of the body 11, that is, on the right side in the figure. Although not shown, the winding shaft 16 is driven by a motor to wind up the film 1. The winding surface of the winding shaft 16, as shown in FIG. 17 are coated, and around the winding shaft 16, for example, three film guides 18A to 18C are provided.

The guides 18A to 18C are linear in a direction parallel to the center axis of the winding shaft 16 and arc-shaped in a direction orthogonal to the center axis. And guides 18A-18C
One end on the arc side is supported by the body 11 and the other end thereof is brought into contact with the winding shaft 16 by a torsion spring (not shown). Further, film holding rollers 10A to 10C are provided at the ends of the guides 18A to 18C on the winding shaft 16 side, respectively.
6 is supported so as to be parallel to the central axis.

Then, for example, the roller 10 of the guide 18A
The diameter of A is the above-mentioned size, and a part of the roller 10A is a permanent magnet 31 magnetized with NS in the radial direction. A magnetic sensor 32 is provided on the guide 18A in opposition to the magnet 31. Have been.

The opening behind the dark box 12 is a rectangular opening (aperture) 19 of, for example, 30 mm (film width direction) × 40 mm (film length direction) corresponding to the frame 3 of the film 1 described above. ing. However, the opening 19
Since the light reaching the film 1 from the lens 13 at the time of photographing does not come into close contact with the film 1 and is not a parallel light beam, the size of the frame 3 of the film 1 is set to 30.
mm × 40 mm, the size of the opening 19 is 30 mm
Slightly smaller than × 40 mm.

Further, behind the dark box 12, the opening 1
9, a pair of film guide rails 21 is provided in parallel along the opening 19 and at least over the range of the opening 19 on both sides in the film width direction.

FIGS. 1 and 2 show an example of an apparatus for imprinting data. FIG. 1 is a front view of a back cover showing the whole state, and FIG. 2 is a front view of the apparatus with its film pressure plate removed. .

That is, in the front of the back cover 41, the opening 19
A film pressure plate 42, which is larger than the opening 19 and is rectangular, is provided at a position opposite to the opening 19, and the pressure plate 42 extends over, for example, the upper long side of the frame 3 of the film 1 (the long side in full size). At the opposing position, the through hole 43
Is formed.

The through hole 43 is faced with, for example, a six-digit day-shaped light emitting element 44 such that the six-digit arrangement direction is the film length direction. In this case, the element 44 is pivotally supported near the center of the switching lever 45, and one end of the lever 45 is pivotally supported by the back cover 41 by the pin 46.

Therefore, as shown in FIGS. 2A and 2B,
When the free end of the lever 45 is moved up and down in the film width direction around the pin 46, the element 44 moves in the film width direction. At this time, the element 44 is guided by the guide rail 47 and is moved in the film width direction. It is made to move in parallel. At this time, although not shown, the toggle spring stabilizes the element 44 at the position shown in FIGS. 2A and 2B.

The element 44 is connected to a system controller (not shown) through a cable 48 and further through a contact 49. Reference numeral 51 denotes a patrone pressing spring.
Further, the viewfinder, aperture, shutter, and the like are configured in the same manner as a current camera. A film feed amount detection circuit as shown in FIG. 6 is provided.

According to such a configuration, at the time of photographing, the patrone 5 is set in the storage section 14, and the film 1 reaches the winding shaft 16 from the patrone 5 through the opening 19. Then, at this time, the film 1 is pressed against the winding shaft 16 by the film guides 18A to 18C and the pressing rollers 10A to 10C, so that when the winding shaft 16 rotates, the film 1 is wound on the winding shaft 16. That is, the film 1 is fed without perforation.

When feeding the film, the film 1
The rollers 10A to 10C and the magnet 31 rotate in response to the feeding of the magnet, and the rotation of the magnet 31 is detected by the sensor 32. The detection output is counted by the counter 33 as shown in FIG. It is supplied to the system controller 34.

The system controller 34 is for setting the operation of the whole camera, for example, the aperture value and the shutter speed. Each time the film 1 is fed by 5.25 mm or 6.28 mm, a guide is set. Since the roller 10A of 18A makes one rotation, the feed amount of the film 1 is detected by the count output of the counter 33, and the drive of the winding shaft 16 is driven through the drive amplifier 35 so that this becomes a count value corresponding to the size of the frame 3. The amount of rotation of the motor 36 is controlled. Therefore, the film 1 is fed at the pitch of the frame 3 corresponding to the format.

At the time of photographing, when the free end of the lever 45 is lowered as shown in FIG.
Since the position 4 is located below the through hole 43, the data 4 is printed inside the piece 3 and at a position along the upper long side as shown in FIG.

When the free end of the lever 45 is raised as shown in FIG.
, So as shown in FIG.
The data 4 is imprinted outside the frame 3 and at a position along the upper long side.

FIG. 11A shows an example of data 4 that can be imprinted on the film 1 by the light emitting element 44, and FIG. 11B shows an example of characters that can be used as the data 4. Thus, according to this example, the light emitting elements 44 are provided so as to be able to face the inside and outside of the frame 3 and the perforations 2 are eliminated from the film 1, so that the data 4 can be stored inside and outside the frame 3. You can imprint in either of the positions.

Further, by moving the light emitting element 44, the data 4
Is switched between the inside and outside of the frame 3, so that the cost is lower than in the case where two light emitting elements are provided inside and outside the frame 3, respectively.

In the above description, the film 1 may be either a positive film or a negative film. Further, photographing data or the like can be imprinted in a non-effective photographing area between the edge of the film 1 and the frame 3, or data indicating the standard of the film 1 can be recorded in advance. Further, the small holes 6 may be formed at a rate of one per frame, and may be replaced with a magnetic mark or the like.

[0053]

According to the present invention, the sprocket hole for driving the sprocket is eliminated from the film 1, and the effective photographing area can be enlarged. Further, photographing data or the like can be imprinted in a non-effective photographing area between the edge of the film 1 and the frame 3, or data indicating the standard of the film 1 can be recorded in advance. Further, the data 4 can be imprinted at a position near the edge of the film, and the useful photographing area can be expanded. By the detecting means abutting on the film 1, the film can be fed at a frame pitch corresponding to the film format even if the sprocket driving through-hole is eliminated.

[Brief description of the drawings]

FIG. 1 is a front view of a back cover of an embodiment of the film camera of the present invention.

FIG. 2 is a front view of a main part of FIG.

FIG. 3 is a partial cross-sectional top view of one embodiment of the film camera of the present invention.

FIG. 4 is a rear view of the film camera according to the embodiment of the present invention, in which a back cover is taken.

FIG. 5 is an exploded perspective view of a main part of one embodiment of the film camera of the present invention.

FIG. 6 is a block diagram for explaining the present invention.

FIG. 7 is a diagram for describing the present invention.

FIG. 8 is a diagram for describing the present invention.

FIG. 9 is a diagram for describing the present invention.

FIG. 10 is a diagram for describing the present invention.

FIG. 11 is a diagram for describing the present invention.

FIG. 12 is a diagram for describing the present invention.

FIG. 13 is a diagram for describing the present invention.

[Explanation of symbols]

 Reference Signs List 1 film 3 frame 4 data 5 patrone 6 small hole 12 dark box 14 patrone storage section 16 film winding axis 32 sensor 44 light emitting element

Claims (1)

(57) [Claims] And 1. A cassette containing portion, and a film accommodating portion, to eliminate the sprocket drive holes, wherein the film cartridge housing having a through hole showing a frame position of the imaging region formed in the first edge near the position Means for winding up the film between the unit and the film storage unit, detecting means for optically detecting through holes in the film, exposing means for exposing the photographable area of the film, and frames exposed by the exposing means Photographing information recording means for recording photographing information at a position near the non-porous second edge opposite to the position near the first edge adjacent to the image forming apparatus, wherein the photographing information recording means is exposed by the exposure means A film-type camera, wherein recording is performed from the other side facing the one side of the film.