JPH0843921A - Film type camera - Google Patents

Abstract

PURPOSE:To extend an effective photographic area and make recording of photographic data possible in an ineffective non-photographic area by recording the information in an area between an area capable of being photographed and the edge parts of the film for each exposed frame. CONSTITUTION:The sent quantity of a film 1 is detected based on the counting output of a counter 33 and the winding degree of a driving motor 36 of a winding shaft is so controlled through a drive amplifier 35 as to convert the sent quantity into a proper counting number reflecting the size of a frame 3. Consequently, the film 1 is sent by a pitch of the frame 3 corresponding to format. At the time of photographing, since an electroluminescent element is positioned in the lower side of a perforation in the case the free end of a lever is lowered, data is recorded at the position in the inside and along the long side in the upper part of the frame 3. In the case the free end of the lever is raised, since the electroluminescent element is positioned in the upper side of the perforation, the data is recorded at the position in the outside and along the long side in the upper part of the frame 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film type camera adapted to enlarge an effective photographing area of film.

[0002]

2. Description of the Related Art The current 35 mm film (system 135) for general photography has JIS and IS sizes.
It is defined by O, etc.

FIG. 12 shows a part of the specified size (the allowable error is omitted). The width of the film 1 is 35 mm, the facing interval of the perforations 2 for film feeding is 25 mm, and 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.
The length of each piece 3 is 38 mm, which is eight times the pitch of the perforations 2 as a reference.

The photographic film which is generally widely used at present is the above-mentioned 35 mm film. As a method for improving the image quality, particularly the resolution, of the film 1, the photosensitizer applied to the i film is improved. ii Increase the width of the film to increase the frame. Can be considered.

[0005]

However, in general, the fineness of the particles of the photosensitizer, that is, the resolution, is inversely proportional to the film sensitivity. Therefore, unless a new photosensitizer is discovered, the image quality is improved by the item i. It is difficult. In that respect, according to the method of the item ii, the image quality can be improved with the current photosensitizer, but since the width of the film 1 becomes large, the camera becomes large and heavy, and various products are produced. Does not match the current trend of smaller size and lighter weight.

[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.

However, with the perforation 2 as described above, when the data such as the photographing date and time is imprinted on the film 1, the data is imprinted at 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.

Further, in FIG. 1B, the data 4 is imprinted between the frames 3, and in this case, the film 1 is placed at the position of the data 4 when it is slid.
It is inconvenient to cut and attach a slide frame. Further, even in the case of a negative film, it is necessary to keep the film 1 long during DPE and storage. Further, at the time of printing, the data 4 cannot be imprinted on the photographic paper, and even if it is possible, when the frame 3 is photographed so as to be horizontally long, each character indicating the data 4 lies sideways. It becomes unnatural.

Further, in FIG. 1C, the data 4 is imprinted so as to straddle the frame 3 and its outer frame on the side of the perforation 2. However, the data 4 is imprinted at the time of printing on photographic paper. It is inconvenient if you don't have it or slide it.

[0011]

According to the present invention, optical information can be recorded at a position in the vicinity of an edge of a film for forming magnetic information by eliminating a cartridge storage portion, a film storage portion, and a sprocket driving through hole. Film, drive means for feeding the film between the cartridge storage portion and the film storage portion, detection means for contacting the film and detecting the feed of the film, and exposure for exposing the filmable area of the film. Means and information recording means for controlling the driving means by a detection signal from the detecting means and recording information between the photographable area and the film edge portion on the frame exposed by the exposing means. It is a film type camera. According to this invention, the sprocket driving through hole is eliminated in the film 1 and the effective photographing area is enlarged. Further, the data 4 can be imprinted at a position near the edge of the film, so that the effective photographing area can be further expanded.

That is, in this case, the camera does not become large and heavy. Further, the existing equipment such as the film manufacturing apparatus and the processing apparatus for the film already taken can be utilized as it is, and the present equipment for 35 mm film can be used together. For example, a device for cutting a wide film coated with a photosensitizer into a width of 35 mm, a standardized patrone manufacturing device, or a device for winding the cut film in the patrone is automated and becomes a large-scale facility. However, these facilities can be used as they are.

Further, the processing after photographing, that is, the processing of developing, printing, and stretching is automated, and all processing devices are designed on the basis that the width of the film is 35 mm. Changing is not practical.

Therefore, the width of the film is 35
It is practical if the image quality is improved to 35 mm, which is the same as 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 camera sprocket to feed the film are provided on both sides of the film.

On the other hand, in the camera, the computerization has progressed, and the drive control by the motor can be performed with considerable accuracy.
It has been confirmed by experiments that the film can be driven with sufficient accuracy without using a large sprocket and perforations 2 as in the past.

Therefore, the perforation 2 is removed from the film 1 having a width of 35 mm, and the length of the frame in the film width direction is expanded to the position where the perforation 2 was located. That is, by doing so, the effective effective photographing area can be enlarged by about 40%, and therefore the image quality can be improved accordingly.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the film type camera of the present invention will be described below with reference to the drawings.

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 in the film width direction and the length in the film length direction of the frame 3, which is the effective photographing area, are 30 mm and 40 mm.
And Further, the pitch of the pieces 3, that is, the film 1
The feed pitch is 42.0 mm.

However, the size and pitch of this piece 3 are
This is to cope with the current television broadcasting system, so that the aspect ratio of the piece 3 is 3: 4.

When dealing with HDTV (so-called high-definition), the size of the piece 3 is 30 mm × 53.3 mm and the pitch is 57.7, as shown in FIG.
5 mm. 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. 7C and 7D, in the current television broadcasting system, 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.

Although not shown, the film 1 having the above format is stored in a cartridge (cartridge) similar to the existing 35 mm film.

Therefore, as shown in FIGS. A and B, if the length of the piece 3 in the film width direction is 30 mm,
This is 1.25 times the length of the current 35 mm film in the film width direction, which is 24 mm, so 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 area is 24 mm × 36 mm = 864 mm ² Fig. 7A: 30 mm × 40 mm = 1200 mm ² , so the area of one frame increases by about 39%, that is, about 39%. The image quality is improved. Further, if the image quality is the same, the image can be enlarged further.

Further, as shown in FIGS. 6C and 6D, even in the half size, since the long side of the frame 3 is close to the width 36 mm in the length direction of the current full size film, 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, 2.5 mm non-photographing areas can be obtained between the frame 3 and both edges of the film 1, respectively. It is possible to secure the flatness of the film 1 at the time of shooting, control the film 1, or read or write data. Further, since it is not necessary to provide the camera with a sprocket for feeding the film, the camera can be made smaller and lighter.

Further, when the film 1 is fed, the film 1
Since there is no perforation, the feed amount of the film 1 is detected by, for example, a detection roller that comes into contact with the film 1. If the pitch of the frame 3 is the above-mentioned 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, for the feed amount of the film 1, the diameter of the detection roller is 3.34 mm, and it is only necessary to detect an integral number of rotations thereof. The detection means can be simplified.

FIG. 8 shows another example of the pitch of the pieces 3, and also 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 integral number of times.
The resolution is also 1/2 rotation.

FIG. 9 shows a case in which the small hole 4 is provided in the film 1 for detecting the feed amount of the film 1, and a magnetic mark or the like can be used instead of the small hole 4 as described later. That is, in the case of the format shown in FIG. 7, as shown in FIG.
Small holes 4 having a diameter of, for example, 1 mm at a pitch of 5.25 mm on a line of 5 mm, that is, on a line between the edge and the piece 3.
To provide. Similarly, in the case of the format shown in FIG. 8, the small holes 4 are provided at a pitch of 6.28 mm as shown in FIG. 9B.

Since the pitches of the small holes 4 of 5.25 mm and 6.28 mm are determined on the basis of the above-mentioned ground, they can be applied to the current television broadcasting and HDTV, and can be used in both full size and half size. Can handle. That is, at the time of feeding the film, the number of the small holes 4 is counted by a photo interrupter using infrared light or the like,
When the number of films reaches the above-mentioned number, if the film feeding is stopped, the frames 3 are formed on the film 1 at the correct pitch.

FIG. 3 is a partial cross-sectional view of an example of a camera according to the present invention, and the cross section is a plane parallel to the bottom surface of the dark box portion of the camera. Further, 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 at the front opening thereof.
Further, one inside portion of the body 11, that is, the left side in the drawing is a cartridge storage portion 14, and a film supply shaft 15 is provided above the cartridge storage portion 14.
Is provided, and the patrone 5 accommodating 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 portion of the body 11, that is, on the right side in the figure. Although not shown in the drawing, the winding shaft 16 winds the film 1 by being driven by a motor. The winding shaft 16 has a peripheral surface, for example, a high friction material such as neoprene as shown in FIG. 17 is 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 central axis of the winding shaft 16 and arcuate in a direction orthogonal to the central axis. And guides 18A-18C
One end on the arc side is pivotally supported on the body 11, and the other end 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.
It is axially supported so as to be parallel to the central axis of 6.

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

The rear opening of the dark box 12 is a rectangular opening (aperture) 19 of, for example, 30 mm (in the film width direction) × 40 mm (in the film length direction) corresponding to the frame 3 of the film 1. ing. However, the opening 19
Since the light reaching the film 1 from the lens 13 is not in close contact with the film 1 at the time of shooting, the size of the frame 3 of the film 1 is 30
If the size is mm × 40 mm, the size of the opening 19 is 30 mm
It is slightly smaller than × 40 mm.

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

1 and 2 show an example of a device for imprinting data, FIG. 1 is a front view of the back cover showing the entire state thereof, and FIG. 2 is a front view of the state in which the film pressure plate is removed. .

That is, the opening 19 is provided on the front surface of the back cover 41.
A rectangular film pressure plate 42 larger than the opening 19 is provided at a position opposed 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 (long side in full size). Through hole 43 at the opposite position
Is formed.

In the through hole 43, for example, a six-digit day-shaped light emitting element 44 is exposed so that the arrangement direction of the six digits 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 around the pin 46 in the film width direction, the element 44 moves in the film width direction. At this time, the element 44 is guided by the guide rail 47 to move 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 in the position shown in FIGS. 2A and 2B.

Then, the element 44 is connected to a syscon (not shown) through a cable 48 and a contact 49. Reference numeral 51 is a patrone pressing spring.
Further, the viewfinder, diaphragm, shutter and the like are configured in the same manner as the existing camera. Further, for example, a film feed amount detection circuit as shown in FIG. 6 is provided.

According to such a structure, at the time of photographing, the cartridge 5 is set in the storage portion 14, and the film 1 reaches the winding shaft 16 from the cartridge 5 through the opening 19. At this time, since the film 1 is pressed against the winding shaft 16 by the film guides 18A to 18C and the pressing rollers 10A to 10C, the film 1 is taken up by the winding shaft 16 when the winding shaft 16 rotates. That is, the film 1 will be fed without perforation.

When the film is fed, the film 1
The rollers 10A to 10C and the magnet 31 rotate in response to the feeding of the magnet 31, the rotation of the magnet 31 is detected by the sensor 32, and 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 entire camera, for example, setting the aperture value and the shutter speed, and guides each time the film 1 is fed by 5.25 mm or 6.28 mm. 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 winding shaft 16 is driven through the drive amplifier 35 so that this becomes the count value corresponding to the size of the frame 3. The rotation amount of the motor 36 is controlled. Therefore, the film 1 is fed at the pitch of the frame 3 corresponding to the format.

Then, at the time of photographing, when the free end of the lever 45 is lowered as shown in FIG. 2A, the light emitting element 4
Since 4 is located below the through hole 43, the data 4 is imprinted inside the piece 3 and along the upper long side as shown in FIG.

Further, when the free end of the lever 45 is raised as shown in FIG. 2B, the light emitting element 44 has the through hole 43.
Since it is located on the upper side of
The data 4 is imprinted on the outside of the frame 3 and along the upper long side.

FIG. 11A shows an example of data 4 that can be printed 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, since the light emitting element 44 is provided so as to be able to face the inside and the outside of the frame 3, and the perforation 2 is eliminated from the film 1, the data 4 is stored inside and outside the frame 3. Can be imprinted on either position.

Further, the light emitting element 44 is moved to move the data 4
Since the imprinting position is switched between the inside and the outside of the piece 3, the cost is lower than that when two light emitting elements are provided inside and outside the piece 3, respectively.

In the above description, the film 1 may be either a positive film or a negative film. Further, it is also possible to imprint photographing data or the like on an ineffective photographing area between the edge portion of the film 1 and the frame 3, or to record the standard of the film 1 in advance. Further, the small hole 4 may be formed with one division for one frame, and instead of the small hole 4, a magnetic mark or the like may be used.

[0053]

According to the present invention, the effective photographic area can be expanded by eliminating the sprocket holes for driving the sprocket in the film 1. Further, shooting data and the like can be imprinted in an ineffective shooting area between the edge portion 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. Even if the through hole for driving the sprocket is eliminated by the detecting means that comes into contact with the film 1, the film can be fed at the frame pitch corresponding to the film format.

[Brief description of drawings]

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

FIG. 2 is a front view of the 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 with the back cover removed.

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

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

FIG. 7 is a diagram used for explaining the present invention.

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

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

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

FIG. 11 is a diagram used for explaining the present invention.

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

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

[Explanation of symbols]

 1 Film 3 Frame 4 Data (Small Hole) 5 Patrone 12 Dark Box 14 Patrone Storage Section 16 Film Winding Axis 32 Sensor 44 Light Emitting Element

Claims (4)

[Claims] 1. A film in which a cartridge storage portion, a film storage portion, and a sprocket driving through hole are eliminated so that optical information can be recorded at a position near an edge of the film, and the film is stored in the cartridge storage portion and Driving means for sending to and from the film storage portion, detecting means for detecting the feeding of the film, exposing means for exposing the filmable area of the film, and controlling the driving means by a detection signal from the detecting means. A film type camera comprising: a control unit; and an information recording unit for recording information between the photographable area and the edge of the frame exposed by the exposure unit. 2. The film type camera according to claim 1, wherein the film is adapted to form magnetic information at a position near the edge portion. 3. The film type camera according to claim 1, wherein the detecting means is in contact with the film to detect the feeding of the film. 4. The film type camera according to claim 3, wherein the detection means includes a rotating member that comes into contact with the film and rotates corresponding to the feeding of the film, and a sensor that detects the rotation of the rotating member. Film type camera characterized by.