JP2589206Y2 - Mounting structure of fiber optic plate in instant film bag - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an instant film bag loaded with an instant film and detachably mounted on a camera, and more particularly, to a structure for mounting a fiber optic plate on the instant film bag.

[0002]

2. Description of the Related Art Conventionally, there is a camera in which a film bag loaded with a roll film is detachably attached to a camera body. In such a camera, by preparing a plurality of roll films, it is possible to continuously perform photographing without complicating film exchange. In addition, in such a camera, an instant film bag loaded with an instant film is mounted in place of the film bag in order to check the composition and the like before photographing, and development using the instant film is performed on site before photographing with the roll film. Baking can be performed.

[0003] Since the instant film bag is retrofitted and the instant film is larger than a normal roll film, the photosensitive surface of the instant film is a normal roll film when the instant film bag is mounted on the camera body. , I.e., behind the imaging plane formed by the taking lens system on the camera body side. For this reason, conventionally, a fiber optic plate is interposed between the imaging surface of the camera and the photosensitive surface of the instant film, and the image formed on the imaging surface of the camera is directly exposed to the photosensitive film of the instant film. I try to lead to the surface.

In the fiber optic plate, optical fibers are bundled into a predetermined length, a light receiving surface is formed at one end in the longitudinal direction, and the same image as the image formed on the light receiving surface is projected at the other end. An emission surface is formed. The fiber optic plate is floatingly supported on the instant film back side so as to be movable in the longitudinal direction, that is, along the optical path direction. This involves positioning the light receiving surface of the fiber optic plate with reference to the inner rail in the guide rail on the camera body side, aligning the imaging surface on the camera body side with the light receiving surface, and setting the light emitting surface on the photosensitive surface of the instant film. This is to make them adhere.

[0005]

However, for example, when the instant film bag is carried while being attached to the camera body, the fiber optic plate vibrates, and in some cases, the light receiving surface and the inner rail in the guide rail may be moved. Collides with each other, and there is a concern that both may be damaged.
Here, it is needless to say that the light receiving surface of the fiber optic plate must prevent the occurrence of scratches. Of course, the inner rail of the guide rail is also the surface where the emulsion surface of the roll film contacts, and the occurrence of scratches is also prevented. Must.

A camera using a film having a frame size of 45.times.60 mm has been widely used. However, a camera for obtaining a horizontally long image on this screen has a film with a viewfinder and a release button on the upper side. It is configured to be wound up. Further, there is also known a type in which a room is defined behind an image forming plane of the camera and a film is wound in the room in order to reduce the size of the entire camera. Therefore, when attaching an instant film back to these cameras, the fiber optic plate must be relatively long and heavy, and in the case of the floating support described above, such a large fiber optic plate is required. Supporting the plate is almost impossible.

Therefore, it is conceivable to fix and support the fiber optic plate on the instant film bag. However, if the fiber optic plate is simply fixed, a force for fixing acts on the fiber optic plate, and distortion or the like is applied to the fiber optic plate. As a result, the optical performance of the fiber optic plate deteriorates. In addition, if the light receiving surface of the fiber optic plate needs to be polished due to damage or the like during handling if it is simply fixed, the fiber optic plate is difficult to be polished and cannot be reused.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an instant type in which a fiber optic plate is interposed between an imaging surface of a camera body and a photosensitive surface of an instant film. In the film back, even if the fiber optic plate is long and heavy, the fiber optic plate can be reliably supported without deteriorating the optical performance, and the light receiving surface of the fiber optic plate can be easily polished. An object of the present invention is to provide a mounting structure of a fiber optic plate in an instant film bag.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a case body which is loaded with an instant film and is detachably attached to a camera body, has a predetermined length, and has a predetermined length. A fiber optic plate having a light receiving surface formed at one end and an emission surface on which the same image as the image formed on the light receiving surface is projected at the other end,
Mounting means for mounting the fiber optic plate on the case body side by positioning the light receiving surface on the imaging surface of the camera body and positioning the light emitting surface on the photosensitive surface of the instant film. Wherein said attaching means is attached to said longitudinally extending side portion of said fiber optic plate, and an attaching piece projecting from said side portion in a direction intersecting said longitudinal direction; Fixing means for detachably attaching the mounting pieces protruding from the side to the case body side, respectively.

Further, the present invention is characterized in that both ends of the mounting piece respectively protrude from side portions of the fiber optic plate. Further, the present invention is characterized in that the fiber optic plate has a rectangular parallelepiped shape, and the mounting pieces are respectively attached to two opposing side surfaces of the side surfaces constituting the side portion of the fiber optic plate. In addition, according to the present invention, the portion on the case body side is disposed between the mounting piece portions protruding from the mutually facing side surfaces of the fiber optic plate, and the dimension of the case body side portion in the direction between the mounting piece portions is ,
The fiber optic plate is formed to have the same or slightly larger dimension as the dimension between the side surfaces of the fiber optic plate between the mounting pieces. In the present invention, the fixing means may include a screw hole formed on the case body side, a long groove for screw insertion formed on the mounting piece, and a screw inserted into the long groove and screwed into the screw hole. It is characterized by comprising. Further, the present invention is characterized in that the attachment piece is attached to the side of the fiber optic plate by bonding.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the camera body viewed from the back side, and FIG. 2 is a perspective view of an instant film bag. Reference numeral 1 denotes a camera, 3 denotes a camera body, and 5 denotes an instant film back. The camera 1 uses, for example, a roll film having a frame size of 45 × 60 mm, and shoots. Normally, a roll film bag loaded with such a roll film is detachably mounted in a film accommodating chamber 7 opened on the rear surface of the camera body 3. Then, when confirming the composition or the like before performing normal photographing, the instant film bag 5 is attached instead of the roll film bag.

FIG. 3 is a cross-sectional plan view of a main part in a state where the instant film bag is mounted on the camera body. The instant film back 5 has a case body 11 loaded with the instant film 9 and detachably mounted on the camera body 3, and an image formed on the imaging surface of the photographing lens system on the camera body 3 side. And a fiber optic plate 13 that moves optically on the photosensitive surface of the optical disc. The case body 11 includes a film case 15 in which a plurality of instant films 9 are stored,
Outer case 17 for accommodating this film case 15
The film case 15 is provided with a spring 21 for biasing the photosensitive surface of the instant film 9 in the direction of the light exit surface 13B of the fiber optic plate 13.

The outer case 17 is provided with the camera body 3.
Box-like holder 1701 located on the side, and holder 1701
A lid 1703 is swingably attached to the rear end opening and opens and closes the rear end opening. A hook 1705 holds the rear end opening closed by the lid 1703.

FIG. 4 is a perspective view showing the relationship between the fiber optic plate and the mounting piece. The fiber optic plate 13 is formed in a rectangular parallelepiped shape having a predetermined length in which optical fibers are bundled, and the light receiving surface 13A and the light emitting surface 13B located at both ends in the longitudinal direction (optical path direction) are finished with flat surfaces parallel to each other. , On the side extending in the longitudinal direction,
A pair of side surfaces 13C, 13C that are parallel to each other, and a pair of side surfaces 1 that are orthogonal to and parallel to the side surfaces 13C, 13C.
3D and 13D are formed.

The mounting of the fiber optic plate 13 by the mounting portion 19 is performed as follows. First, the attachment piece 23 is formed using an adhesive 22 or a double-sided tape.
Is attached to the side surface 13C of the fiber optic plate 13. The mounting piece 23 has a length L2 shorter than the length L1 of the fiber optic plate 13.
In addition, a fiber having a width W2 larger than the width W1 of the side surface 13C is bonded so that both ends thereof are located outside the side surface 13C, and a fiber is attached to the mounting piece 23 located outside the side surface 13C. Three long grooves 2301 extending in a direction parallel to the longitudinal direction of the optic plate 13 are formed.

FIG. 5 is a perspective view showing the relationship between the fiber optic plate, the first mounting plate, and the guide frame, and FIG.
FIG. 7 is a front view, and FIG. 7 is a perspective view showing the relationship between the fiber optic plate, the second mounting plate, and the guide frame. The frame-shaped guide frame 25 constituting the mounting portion 19 is provided with a side surface 13 of the fiber optic plate 13.
First mounting plates 27 are respectively erected by screws 26 at positions facing D, and three screw holes 2703 are formed in both side portions 2701 of the first mounting plate 27. The fiber optic plate 13 allows the screw 29 to pass through a long groove 2301 located at the center of the mounting piece 23, and is screwed into a screw hole 2703 located at the center of the side 2701 of the first mounting plate 27. After adjusting the light receiving surface 13A so that the front end face 25A of the guide frame 25 coincides with the light receiving surface 13A, a screw 29 is fastened, thereby fixing the light receiving surface 13A to the frame-shaped guide frame 25 side. Further, the second mounting plate 31 in which the escape recess 3101 at the head of the screw 29 is formed is fitted on the mounting piece 23, and the screws 33 inserted through the long grooves 2301 at both ends and the screw holes 2703 at both ends are fastened. This second
The mounting plate 31 and the guide frame 25 are fastened with screws 35,
Thus, the fiber optic plate 13 is more firmly fixed to the guide frame 25 side.

With such a mounting structure, the fiber optic plate 13 is supported by connecting both ends of the mounting piece 23 to the guide frame 25 side. In this case, as shown in FIG. 7, the width W3 of the first mounting plate 27 and the width W4 of the fiber optic plate 13 are set to be the same, or the width W3 of the first mounting plate 27 is set to the width W4 of the fiber optic plate 13. If set slightly larger than the first mounting plate 27,
No stress is applied to the fiber optic plate 13 even if the fiber optic plate 13
This is advantageous in that the support is ensured without causing distortion or the like.

As described above, the first and second mounting plates 27, 31
As shown in FIGS. 8 and 9, a support plate 37 having a fiber optic plate insertion window 3701 is screwed on the emission surface 13 </ b> B side of the fiber optic plate 13 whose side is surrounded by the guide frame 25.
9, a frame-shaped cover 43 is attached to the outside of the support plate 37 with a pair of hook pieces 41 interposed therebetween. . Furthermore, a window 4701 through which the fiber optic plate 13 is inserted is provided with a slide piece 45 interposed outside the cover 43.
The base plate 47 having the
7, the holder 1701 is attached. The hook piece 4
1 is a lock pin 7 of the film storage chamber 7 of the camera body 3
The hook piece 41 moves up and down through the oblong long groove 4501 due to the movement of the slide piece 45, thereby engaging and disengaging with the lock pin 701, and
3, the lock mechanism including the hook piece 41, the slide piece 45, the spring 4503, and the like has the same configuration as the roll film back.

As shown in FIG. 3, a guide rail comprising an inner rail 51 and an outer rail 53 is provided in the back of the film accommodating chamber 7 of the camera body 3 for sliding support of the roll film and guiding of the edge. I have. The outer rail 53 protrudes from the inner rail 51 in the optical axis direction, and a tunnel gate for passing a roll film is formed between the two rails 51 and 53. The imaging surface of the camera body 3 is set at a position located about 0.1 mm behind the film guide surface of the inner rail 51 in the optical axis direction. The instant film back 5 is configured such that the front end surface of the guide frame 25 abuts on the outer rail 53 when attached to the camera body 3, and the light receiving surface 13A of the fiber optic plate 13 is It is located on the imaging plane on the body 3 side.

This embodiment is constructed as described above, and has a mounting piece 23 attached to the side of the fiber optic plate 13.
The fiber optic plate 13 is supported on the side of the case body 11 via the through hole, so that no stress is applied to the fiber optic plate 13 and, therefore, the fiber optic plate 13 is not distorted.
Can be reliably supported by the case main body 11.
Further, since the fiber optic plate 13 can be removed from the case body 11 by removing the screws 29, 33, etc., it is necessary to re-polish the light receiving surface 13A.
The polishing can be easily performed, which is advantageous in reusing the fiber optic plate 13. When the light-receiving surface 13A is polished again, the thickness of the spacer (not shown) between the cover 43 and the base plate 47 is adjusted to be thinner, and the photosensitive surface of the instant film 9 is brought into contact with the emission surface 13B.

In the embodiment, the case where two mounting pieces 23 are used has been described. In short, the mounting pieces 23 only need to have a portion projecting outward from the side of the fiber optic plate 13. Therefore, the four mounting pieces 23
, And the side portions may be projected outward. Further, in the embodiment, since the attachment piece 23 is attached to the fiber optic plate 13 with an adhesive, the attachment can be easily performed without applying any stress. Further, in the embodiment, the case where the first mounting plate 27 is mounted so as to be sandwiched between the two mounting pieces 23 has been described. However, whether or not the first mounting plate 27 is sandwiched is optional. Various structures are conceivable for mounting via the mounting piece 23 mounted on the side of the mounting member 13.
The present invention is applied to all the mounting structures using No. 3.

[0022]

As is apparent from the above description, according to the present invention, a case body loaded with an instant film and detachably mounted on a camera body, a case body having a predetermined length, and having a predetermined length. A fiber optic plate having a light receiving surface formed at one end and an emission surface on which the same image as the image formed on the light receiving surface is formed at the other end, and the light receiving surface is formed on an image forming surface on the camera body side. Position it,
Mounting means for mounting the fiber optic plate to the case body with the light exit surface positioned on the photosensitive surface of the instant film, wherein the mounting means is provided in the longitudinal direction of the fiber optic plate. The case is detachably attached to a mounting piece that is attached to a side part extending in the direction, and that protrudes from the side part in a direction intersecting the longitudinal direction and the mounting piece part that protrudes from a side part of the fiber optic plate. Since it is composed of fixing means attached to the main body, even if the fiber optic plate is long and heavy, the fiber optic plate can be reliably supported without deteriorating the optical performance. Can easily polish the light-receiving surface of The ability.

[Brief description of the drawings]

FIG. 1 is a perspective view of a camera body viewed from a back side.

FIG. 2 is a perspective view of an instant film bag.

FIG. 3 is a cross-sectional plan view of a main part in a state where an instant film back is mounted on a camera body.

FIG. 4 is a perspective view showing a relationship between a fiber optic plate and a mounting piece.

FIG. 5 shows a fiber optic plate and a first mounting plate,
FIG. 4 is a perspective view showing a relationship with a guide frame.

FIG. 6 shows a fiber optic plate and a first mounting plate,
It is a front view showing the relation with a guide frame.

FIG. 7 shows a fiber optic plate and a second mounting plate,
FIG. 4 is a perspective view showing a relationship with a guide frame.

FIG. 8 is an exploded perspective view of a fiber optic plate portion.

FIG. 9 is an exploded perspective view of an outer case portion.

[Explanation of symbols]

 Reference Signs List 3 camera body 5 instant film back 11 case body 13 fiber optic plate 23 mounting piece 27 first mounting plate 31 second mounting plate

Claims (6)

(57) [Scope of request for utility model registration] 1. A case body loaded with an instant film and detachably mounted on a camera body, having a predetermined length, a light receiving surface formed at one end in a longitudinal direction, and the light receiving surface at the other end. A fiber optic plate on which an emission surface on which the same image as the image formed on the image is projected is formed; and the light receiving surface is positioned on an imaging surface on a camera body side; and the emission surface is a photosensitive surface of the instant film. Mounting means for mounting the fiber optic plate to the case body side at a position in which the fiber optic plate is attached to the longitudinally extending side of the fiber optic plate. A mounting piece protruding from the side in a direction intersecting the longitudinal direction, and a mounting protruding from the side of the fiber optic plate. Fixing means for detachably attaching each of the attached mounting pieces to the case main body side, and a mounting structure for a fiber optic plate in an instant film bag. 2. The mounting structure for a fiber optic plate in an instant film back according to claim 1, wherein both ends of the mounting piece project from side portions of the fiber optic plate. 3. The fiber optic plate according to claim 1, wherein the fiber optic plate has a rectangular parallelepiped shape, and the mounting pieces are respectively attached to two opposing side surfaces among side surfaces constituting side portions of the fiber optic plate. Mounting structure of fiber optic plate in instant film back. 4. A part on the case body side is disposed between the mounting piece parts protruding from the mutually facing side surfaces of the fiber optic plate, and a dimension of the case body side part in a direction between the mounting piece parts is: 4. The mounting structure for a fiber optic plate in an instant film back according to claim 3, wherein the size is equal to or slightly larger than a size between side surfaces of the fiber optic plate between the mounting pieces. 5. The fixing means includes a screw hole formed in the case body, a long groove for screw insertion formed in a mounting piece, and a screw inserted into the long groove and screwed into the screw hole. 5. The mounting structure of a fiber optic plate in an instant film bag according to claim 1, 2, 3, or 4, wherein 6. The mounting structure for a fiber optic plate in an instant film back according to claim 1, wherein the mounting piece is attached to a side portion of the fiber optic plate by bonding.