JP2543513Y2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a film packaging container having a built-in film and exposure mechanism (hereinafter simply referred to as a film unit).
More specifically, the present invention relates to a film unit for preventing image deterioration due to flare or ghost.

[Conventional technology]

The present applicant has provided a film unit (product name "Sharun is Hi", etc.) so that photographers can easily enjoy photography even when they do not carry the camera. This film unit with a lens has been
The film is stored in advance as described in JP-A-62-5698, and a simple shutter and a film feed mechanism are provided.

The above-mentioned film units can be easily used, and various types such as a type with a strobe and a telephoto type are commercially available because of their good photographic properties. Under these circumstances, the aspect ratio of the film screen was changed from full size to landscape,
A panoramic camera (product name) sold by Kodak Company is known. This camera has a focal length of 25mm
A wide-angle lens is used as a shooting lens,
The film is photographed through a 36 mm wide (aspect ratio 3) aperture. When printing from this film, printing is performed at twice the enlargement rate of a normal service print, and a horizontally long panoramic print is created.

The above-mentioned film unit for panoramic photographing uses a film unit corresponding to a normal full-size screen, and separately incorporates an exposure frame member having an aperture having an aperture size of 12 × 36 mm.

The exposure frame member is made up of two parts resin-shaped by a horizontal dividing line, and assembled into the main body in a state where they are vertically combined.

[Problems to be solved by the invention]

However, in the frame member divided into upper and lower parts as described above, there is a possibility that a seam may be formed in a horizontally long opening that is in close contact with the film surface, and each part is required to have precision so that light does not leak from the seam. Also, when assembling the upper and lower frame members into the main body, the upper and lower components are not integrated, so it is necessary to assemble them while paying attention not to separate them. There was also a problem in point.

[Purpose of the invention]

The present invention has been made to solve the above problems, and by improving the structure of the frame member, the cost of the frame member is reduced and the work of assembling the frame member is simplified. It is an object of the present invention to provide a film unit that can be securely locked in a state where it is accommodated in a full-size screen opening of a unit.

[Means for solving the problem]

In order to achieve the above object, the present invention incorporates an exposure applying mechanism including a photographic lens and a shutter mechanism in which an unexposed film is stored in advance and a predetermined exposure is applied to the film by operating an external operation member. In a film unit with a lens provided with an exposure opening corresponding to a 35 mm full-size screen between a film supply chamber and a film take-up chamber, the exposure unit is accommodated in the full-size exposure opening, and has an exposure area having an area smaller than the full size. The first to decide
An exposure frame member having a rectangular opening formed therein and a second rectangular opening formed in front of the exposure frame member and blocking light harmful to photographing between the taking lens and the first opening. And a harmful light blocking member provided.

More specifically, means for fixing the exposure frame member and the harmful light blocking member integrally in front of the exposure opening is provided in the main body in a state where the exposure frame member and the harmful light blocking member are integrally connected, thereby simplifying the assembling work. . Further, the back side of the film supply chamber, the film take-up chamber, and the exposure opening provided in the main body is opened, and the back side is light-tightly covered with the back cover, and the front of the back cover facing the exposure opening is provided. A plurality of projections for supporting the rear surface of the film, so that the film does not make surface contact with the rear cover.

[Action]

According to the above, the exposure frame member and the light-shielding frame member that fit each other are integrally connected and inserted into the full-size screen opening, so that a seam does not appear on the film surface. In addition, since these frame members are integrally connected, they can be handled as one part when assembled.
The factory also has workability. In addition, since these frame members are provided with claws, they can be securely locked only by pushing them.

Hereinafter, the present invention will be described according to the illustrated embodiment.

〔Example〕

FIG. 3 shows the appearance of a film unit with a lens using the present invention.
Is composed of a unit body 3 and an exterior body that covers the unit body, for example, a paper box 4. An opening is formed in a required portion of the paper box 4, and in addition to the photographing lens 5 provided in the unit body 3, a finder objective window 6, a shutter button 7, a counter window 8,
The winding dial 9 and the finger clamp 10 are exposed to the outside. Reference numeral 11 denotes a lens hood integrated on the front surface of the unit body 3.

In FIG. 1 showing a cross section of a main part of the film unit with lens 2 shown in FIG. 3 taken along the line YY, and FIG. A cover 13 and a back cover 14 are provided. The main body 12 has a full-size exposure opening formed on the back side.
A film roll chamber 15 and a patrone chamber 16 are provided so as to sandwich 71. Patrone in film roll room 15
Film 18 drawn from 17 is stored in a roll shape,
A winding dial 9 is provided above the patrone chamber 16, and the film 18 can be wound around a patrone shaft 17a by rotating the winding dial 9 counterclockwise.

The main body 12 has a sprocket partially exposed on the back surface thereof and engaged with the perforation of the film 18,
A shutter driving mechanism 26 including a kick lever 24 and a counter disk 25 is incorporated. When the winding dial 9 is rotated to wind the film 18 by one frame, the sprocket is rotated once by the rotation, and the counter disk is rotated.
25 is fed by one scale, shutter charging is performed, and the winding dial 9 is locked. And
When the shutter button 7 is pressed again, the tip of the kick lever 24 instantaneously moves to the right in the drawing, so that photographing is performed.

An opening 28 is formed on the front surface of the main body 12, and a lens holder 30 is fitted into the opening 28. This lens holder 30
As shown in FIG. 1, the second lens 31, the spacing ring 32,
The shutter blades 38, the shutter cover 46, and the first lens 48 are assembled in this order, and finally, the retaining ring 49 is fitted over the lens holder 30 by fitting them. And
By determining the distance between the first lens 48 and the second lens 31 based on the thickness of the spacing ring 32, the wide-angle (approximately 75 ° angle of view) photographing lens 5 suitable for panoramic photographing is formed.

At the center of the spacing ring 32, a stop aperture 32a for determining the opening diameter of the photographing lens 5 is formed, and at a part of the outer periphery, a notch 32b for securing a moving path of the shutter blade 38 is formed. I have. The aperture opening 3
The shutter blade 38 has a substantially V shape so that the shutter 2 can be opened and closed, and is rotatably attached to a pin 51 protruding from the front surface of the main body 12.

The opening and closing of the shutter blades 38 is performed by a drive lever 52. The drive lever 52 is provided with a pin 57 implanted on the front of the main body 12.
And is urged by a spring 59 in a counterclockwise direction. One end 52a of the driving lever 52 is connected to the kicking lever 24.
After the kick lever 24 moves clockwise against the spring 59 in the process of moving to the right, the kick lever 24 returns to the original position again. Pin 52b implanted at the other end of drive lever 52
Is a slot 38 provided in a bent portion of the shutter blade 38.
a, the drive lever 52 is
When the reciprocating swing is performed, the shutter blade 38 opens and closes the aperture 32a to perform one exposure. The shutter cover 46
Has a function of preventing the tip of the shutter blade 38 from swinging in the optical axis direction when the shutter blade 38 operates.

The lens holder 30 incorporating the photographing lens 5, the shutter blades 38 and the like is fitted into the opening 28 of the main body 12, and the driving lever
After attaching 52, these front surfaces are covered with a holding plate 50, thereby completing the assembly of the shutter and lens assembly.

The exposure opening 71 of the main body 12 is provided with an exposure frame 65 for determining an exposure range for the film 18. This exposure frame 65
The opening 65a has a size of 12 × 36 mm vertically / horizontally about the optical axis, and the screen size of the film 18 is determined through this opening. The gap α between the rear surface of the exposure frame 65 and the inner surface of the back cover 14 is slightly larger than the thickness of the film. As shown in FIG. 4, the exposure frame
A light-shielding frame 68 for further cutting off harmful light is connected to the front surface of 65. The opening 68a on the front surface of the light-blocking frame 68 has a size that does not block a light beam effective for photographing, and is reflected by light from outside the photographing angle of view as shown by a broken line in FIG. Light is prevented from entering the film 18.

The exposure frame 65 is made as a rectangular cylindrical molded part, and has a locking hole 66 penetrating through opposing side surfaces of a one-step smaller projection 67 projecting forward. Further, the light-shielding frame 68 is a molded part cut along the YY direction and having a U-shaped cross section, and the side plate 69 is integrally formed with a claw 70 that locks into the hole. Is pushed in from the front of the exposure frame 65, the locking claws 70 of the side plate 69 are locked in the locking holes of the exposure frame 65.
Since they are engaged with each other and are integrally connected, they can be incorporated into the main body 12 as one part.

The front cover 13 covering the front of the main body 12 has a photographic lens 5
And a finder objective window 6 for defining the projection screen and the front field of view. A finder optical system of an inverted Galileo type is built in the back of the finder objective window 6, so that the viewfinder field for wide-angle photographing can be obtained without making the finder objective window 6 larger than a plain finder without a lens. You can get it. The finger clasp 10 is formed integrally with the front surface of the front cover 13.

A back cover 14 that covers the back of the main body 12 is integrated with a bottom plate 77 that closes the bottom surfaces of the film roll chamber 15 and the patrone chamber 16, and is fixed to the main body 12 to fix the film 18.
Is light tightly protected. A part 77a of the bottom plate 77 can be opened as shown in the figure, and the cartridge 17 in which the photographed film 18 is entangled is attached to the unit body 3
It can be easily taken out from. Further, a support surface 78 for supporting the film 18 at the exposure position from the back side is integrally formed on the back cover 14. The support surface 78 is curved as shown to reduce the influence of the distortion of the photographing lens 5. Reference numeral 79 indicates a finder eyepiece window, and reference numeral 80
Denotes an opening for partially exposing the winding dial 9 from the rear cover 14.

 The operation of the above configuration will be described.

When the shutter button 7 is pressed, the shutter driving mechanism 26 is released, and the shutter frame 38 is opened and closed to open and close the exposure frame.
Photographing is performed with a screen size of 65 openings 65a. Exposure frame 65
A light-shielding frame 68 is further provided in front of the camera, so that light from outside the angle of view and light reflected on the inner surface of the main body 12 that is harmful to photographing is cut off, and adverse effects due to flare and ghost can be eliminated.

Next, a modified example of the light shielding frame is shown in FIG. This shading frame
100 has claws 101 and 102 on the front surface and is fixed in the exposure opening 115. The exposure frame 110 is integrated with the above-mentioned nails and holes by using the above-mentioned nails and holes.
, The retaining is performed. Shading frame 10
Since plates 103 and 104 are provided on the front surface of 0, harmful light does not pass through this portion.

The plates 103 and 104 and the claws 101 and 102 serving as the partitions are provided on the exposure frame 110 side, and the opening 68a formed in the light shielding frame 100 may be an opening having a size to expose them forward. Nor. Further, a claw portion may be provided at the position of the small hole 121 of the exposure opening 115, and the claw portion of the light-shielding frame 100 may be used as a locking hole so as to have a locking relationship opposite to that of the above embodiment.

Further, as shown in FIG. 7, by making the back cover portion 130 facing the opening 105 concave, the sliding contact between the exposure frame 110 and the film 141 can be prevented.
If the film is not sufficiently locked in 5, the film is prevented from being damaged even if it is moved back and forth. It is desirable that the vertical width of the recess be slightly larger than that of the opening 105a. Further, as shown in FIG. 8, a plurality of projections 140 may be formed on the front surface of the back cover 14 to support the back surface of the film 141 outside the exposure range. As a result, the film 141 is not brought into surface contact with the back cover 14 behind the opening 105, and the film 141 is less likely to be scratched.

Although the present invention has been described with reference to the illustrated embodiment, the present invention is not necessarily limited to an aspect ratio of around 3, and is 18 × 24 which is half the full size.
The mm size may be horizontally long. In this case, if the film feed length is shorter than the full size,
1.5 times the number of shots can be obtained. These ideas can also be used for ordinary simple cameras.

[Effect of the invention]

As described above, according to the film unit with the lens of the present invention, the first rectangular opening that determines the exposure range is formed in the exposure frame member, and the second rectangular shape that cuts out harmful light and passes a light flux effective for photography. Openings are formed in the light-shielding frame members, respectively, so that they can be integrally connected. Therefore, since the first and second rectangular openings have no joint, it is not necessary to finish both frame members with particularly high precision in order to prevent light leakage from the joint, and the manufacturing cost can be reduced. Further, since these frame members are integrally connected, the assembling work is also simplified.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a film unit with a lens according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a structure of a main part of the film unit with a lens according to the embodiment of the present invention. FIG. 3 is a perspective view showing the appearance of the film unit with a lens according to the embodiment of the present invention. FIG. 4 is an exploded perspective view of the rear side of the film unit with lens according to the embodiment of the present invention. 5 (a) and 5 (b) are perspective views showing an exposure frame and a main body of another embodiment of the present invention. FIG. 6 is a cross-sectional view in which one side is cut horizontally from the optical axis of the exposure frame. FIG. 7 is an exploded perspective view of a main body and a back cover according to another embodiment of the present invention. FIG. 8 is a sectional view of a film passage according to another embodiment of the present invention. 18, 141 Film 31, 116 Second lens 48 First lens 65, 110 Exposure frame 68, 100 Shielding frame 71, 115 Exposure aperture.

Continuing on the front page (72) The creator Junichi Takashiro 1-324 Uetakecho, Omiya-shi, Saitama Prefecture Inside Fuji Photographic Equipment Co., Ltd. Machine Co., Ltd.

Claims (3)

(57) [Scope of request for utility model registration] An exposure providing function comprising a photographic lens and a shutter mechanism for giving a predetermined exposure to this film by operating an external operation member is incorporated in a main body portion in which an unexposed film is stored in advance. A film unit with a lens, in which an exposure opening corresponding to a 35 mm full-size screen is formed between a film supply chamber and a film take-up chamber provided in a main body, wherein the full-size film unit is incorporated in front of the exposure opening. An exposure frame member formed with a first rectangular opening for defining an exposure range having an area smaller than the screen; and an exposure frame member coupled in front of the exposure frame member, which is harmful to photography between the taking lens and the first rectangular opening. A harmful light blocking member in which a second rectangular opening having an area smaller than that of the first rectangular opening is formed in order to block light. Ilm unit. 2. A film unit with a lens according to claim 1, further comprising means for fixing said exposure frame member and said harmful light blocking member integrally connected in front of said exposure opening. . 3. An exposure providing mechanism comprising a photographic lens and a shutter mechanism for giving a predetermined exposure to the film by operating an external operating member, in a main body portion in which an unexposed film is stored in advance. A film unit with a lens in which an exposure opening corresponding to a 35 mm full size screen is formed between a film supply chamber provided in a main body and a film take-up chamber, wherein the film supply chamber and the film take-up chamber, and the exposure The main body with the opening is open on the back side,
The back side is covered lightly by assembling the back cover, and the front of the back cover facing the exposure opening side,
A film unit with a lens, wherein a plurality of projections for supporting the rear surface of the film outside the exposure range are formed so that the film does not come into surface contact with the front surface of the rear cover behind the exposure opening.