JPH08933U - Film unit with lens - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a film unit with a lens that correctly holds a film at an exposure position without increasing the price of the unit body. [Structure] An exposure frame 10 and a supporting surface for supporting the front surface of the film are formed behind the taking lens, a film chamber 11 for accommodating a roll 23 of unexposed film on one side of the exposure frame 10 and a film chamber on the other side. A unit body in which a film cartridge chamber 12 for accommodating a film cartridge having a cartridge shaft to which one end of is attached is formed, and a back plate attached to the unit body for light-tightly closing the back surface of the unit body A film unit with a lens is constructed from and.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a container for accommodating photographic film, and more particularly to a film packaging container having a photographing function such as a photographing lens and a shutter (hereinafter referred to as a "film unit with lens").

[0002]

[Prior art]

 In order to make it easy to take pictures even when the camera is not carried, the applicant has provided a film unit with a lens (trade name "Shaken Run"). This lens-equipped film unit has a 110 film cartridge built in advance in the unit body, which has a simple film-winding mechanism and a self-cocking mechanism in addition to a simple photographing mechanism including a photographing lens and a shutter. is there. Then, the user can easily enjoy taking pictures simply by purchasing the above-mentioned film unit with lens, and after finishing the shooting, the entire unit itself is processed without taking out the film taken. No troublesome operation is required. The lens-fitted film unit used in this manner is required to be easy to operate and inexpensive. For this reason, for the unit body that has a built-in shooting mechanism, the back cover opening and closing mechanism and the complicated exposure control mechanism that are provided in conventional cameras are omitted, and this can be provided at low cost. I am able to

In contrast to the conventional lens-equipped film unit, an attempt is made to incorporate a film having a large screen size, for example, the 135 film with the most popular patrone into the lens-equipped film unit in order to improve image quality. Has been done. In this case, it is convenient to arrange a patrone on the side where the exposed film is transferred so that the film is rolled up in the patrone each time a picture is taken. By doing this, the exposed film will be completely wound up in the cartridge after use, so the unit body can be disassembled in the bright room and the cartridge can be taken out without rewinding operation. Become.

[0004]

[Problems to be solved by the device]

 However, when the 135 film is built in the film unit with a lens as described above, unlike the case where the 110 film with a cartridge is used, it is necessary to devise a device for properly holding the film at the exposure position. That is, in the case of the 110 film with the cartridge, the film is used while being put in the plastic cartridge, so that if the cartridge is positioned at the predetermined position in the unit main body, the film is kept at the predetermined exposure position. On the other hand, in the case of 135 film, the film at the exposure position is pulled out from the cartridge and comes close to the back plate of the unit body. Therefore, when the back plate is deformed by the gripping force when gripping the unit body, this deformation affects the film surface at the exposure position, and the film cannot be held correctly at the exposure position. . On the other hand, in a conventional camera, a film pressure plate elastically held is provided on the back cover so that the back cover is not deformed by pressing the film pressure plate onto the film. However, the use of such a film pressure plate in a film unit with a lens becomes extremely disadvantageous in reducing the cost of the unit body.

The present invention has been made in view of the above technical background, and provides a film unit with a lens capable of properly holding a film at an exposure position without increasing the price of the unit body. The purpose is to

[0006]

[Means for solving problems]

 In order to achieve the above-mentioned object, the present invention is provided with a support surface for supporting an exposure frame and a front surface of a film behind a taking lens, and a film chamber for accommodating a roll of unexposed film on one side across the exposure frame. , The unit main body has a film cartridge chamber for accommodating the film cartridge having the film cartridge shaft with one end of the film attached to the opposite side, and the rear surface of the unit main body is hermetically closed. The film in the film cartridge chamber is provided with a back plate attached to the unit main body, and the film rotates from the film chamber to a position between the support surface of the unit main body and the inner surface of the back plate by rotating the film shaft. We provide a film unit with a lens that can be sent into the cartridge. An embodiment of the present invention will be described below with reference to the drawings.

[0007]

【Example】

 In FIG. 4, which shows the appearance of a film unit with a lens using the present invention, a unit main body 1 is a main body base 2 made by molding plastic, and a spine that closes the rear side opening of the main body base 2 in a light-tight manner. It consists of a plate 3. The main body base 2 is provided with a taking lens 4, a viewfinder window 5, and a release button 6, and a shutter and a film taking mechanism such as a film winding mechanism are built therein. The back plate 3 is fixed to the main body base portion 2 by ultrasonic welding or fitting so that the user cannot remove it. As will be described later in detail, the unit main body 1 is loaded with a 135-type film roll that is pulled out from the cartridge and formed into a roll, and a patrone for winding the film roll. The user can directly operate the release button 6 to take a picture. The exposed film is wound into the cartridge by operating the winding knob 8 (see FIG. 1) each time a picture is taken. After shooting all the frames, they are submitted to the development store as they are. At the developing station, the cartridge is taken out from the unit main body 1, and the conventional developing and printing processes are carried out, and the negative and the print photograph are returned to the user. Therefore, the main body 1 of the lens-equipped film unit is disposable and cannot be returned to the user.

In FIG. 1 showing a state before attaching the back plate 3 to the main body base 2, an opening 2a extending from the back surface to the bottom surface is formed in the main body base 2, and the back 2 is formed so as to shield the opening 2a in a light-tight manner. The shape of the plate 3 is determined. The main body base 2 is provided with a film roll chamber 11 and a cartridge chamber 12 so as to sandwich the exposure frame 10. On the upper wall of the cartridge chamber 12, there is projected a film winding fork 14 which rotates in a counterclockwise direction in the drawing in conjunction with the operation of the winding knob 8. The film supporting surface 15 on which the exposure frame 10 is formed is raised toward the back plate 3 side as shown in the drawing, and a sprocket 16 is exposed above the film. The sprocket 16 engages with the perforation of the film and is rotated by the running of the film, and is used for indexing one frame or stepping the film counter. In the main body 1 of the film unit, a film cassette 20 for 135 films and an unexposed film 21 pulled out from the film cassette 20 are loaded in the film roll chamber 11 and the film cassette chamber 12 in advance at the time of assembly. At the time of this loading operation, a loading jig as shown by the chain double-dashed line in the figure is used. That is, the unexposed film 21 pulled out from the cartridge 20 is wound around the winding shaft 22 for loading work to form the film roll 23. On the other hand, the cartridge 20 is held by the grip arm 25, and the extended portion 26 between the cartridge 20 and the film roll 23 is supported by the support plate 27 so as to be curved slightly upward. Of course, these loading jigs can be configured as a single loading device by connecting them.

The cartridge 20 and the film roll 23 held by the loading jig are moved from the bottom opening 11 a, 12 a of the film roll chamber 11 and the cartridge chamber 12 to the main body by moving the loading jig in the axial direction of the cartridge 20. It is mounted at a predetermined position on the base 2. As a result, the patrone shaft 28 (see FIG. 3), which is rotatably provided on the patrone 20 and has one end of the film 21 engaged, engages the fork 14. Moreover, since the spread portion 26 of the film is lifted up by the support plate 27, the upper edge of the spread portion 26 is not caught on the sprocket 16 when the film is loaded. After the film roll 23 and the cartridge 20 are inserted into the film roll chamber 11 and the cartridge chamber 12 in this way, the grip arm 25 is released and the winding shaft 22 is bent at the slit 22a, for example. Reduce the diameter. Thereby, each of the loading jigs can be retracted in the axial direction. As a result, the cartridge 20 is left in the cartridge chamber 12, and the film roll 23 is placed in the film roll chamber 11. At this time, the film roll 23 tries to be unwound due to the rigidity of the film itself, but since the outermost film of the film roll 23 comes into contact with the inner wall of the film roll chamber 11 and is regulated, the film roll 23 remains at a predetermined diameter. Get calm.

Thereafter, the back plate 3 is covered so as to shield the opening 2a from the light, and is fixed to the main body base 2 by ultrasonic welding or the like. As shown in FIG. 2, a plurality of reinforcing ribs 18 are integrally formed on the inner surface of the back plate 3 and extend in the film transfer direction, that is, in the lateral direction. Thus, even if some pressure is applied to the thin back plate 3, the back plate 3 is not easily bent. The front surface 18a of the rib 18 is curved with substantially the same curvature as the film supporting surface 15 of the main body base 2 as shown. Therefore, as shown in FIG. 3, in the process of attaching the back plate 3 to the main body base portion 2, the front surface 18a of the rib 18 presses the back surface of the film spread portion 26 placed on the film supporting surface 15. , The upwardly curved film extending portion 26 is pressed toward the film supporting surface 15. Then, in the state where the back plate 3 is fixed to the main body base portion 2, the film spread portion 26 comes to be sandwiched and held between the film supporting surface 15 and the front surface 18 a of the rib 18. As a result, the film spread portion 26, that is, the film surface at the exposure position is held at the predetermined exposure position without being lifted or wavy from the film supporting surface 15. Also, during the process of attaching the back plate 3, the sprocket 16 is engaged with the perforation.

A step 32 is formed at one bottom portion of the back plate 3, that is, a portion serving as the bottom of the film roll chamber 11, and the bottom surface of the film roll chamber 1 side is higher than that of the cartridge chamber 12. There is. This is because the film roll chamber 11 needs to support the lower edge of the film roll 23 itself, and the step 32 keeps the film 21 in a horizontal position. When the release button 6 is operated, the shutter 35 is opened and closed, and the spread portion 26 of the film located in the exposure frame 10 is exposed. Then, when the winding knob 8 is operated, the patrone shaft 28 is rotated via the fork 14, and the exposed film is wound into the patrone 20. At the same time, the next film frame is pulled out from the film roll 23 and supplied to the position of the exposure frame 10, and the sprocket 16 rotates following the film supply. When the one-frame fixed-length feed is detected by the rotation of the sprocket 16, the winding knob 8 is locked, and the preparation for the next shooting is completed. The exposed film is sequentially wound into the cartridge 20 by repeatedly taking a picture and winding the film. After all film frames have been taken, they are sent to the photo lab as they are. When the processing is performed at the developing station, it is possible to take out the photographed patrone 20 in the same state as the conventional one by removing the back plate 3 using a disassembling jig or the like. Therefore, after that, the film development and print processing can be performed by the same processing.

In order to simplify the work of taking out the cartridge 20 at the developing station, it is convenient to form a pull-top type opening for removing the cartridge in the bottom portion of the back plate 3. That is, as shown in FIG. 1, a groove 37 that is easily damaged is formed on the inner wall of the bottom surface of the back plate 3 on the side of the cartridge chamber, and a projection 38 is integrally formed on the outer wall. According to this, the projection 38 can be opened along the groove 37 by hooking a finger on the projection 38 and pulling the finger, so that the photographed patrone 20 can be taken out from this opening. In addition, since the unit body 1 is partially damaged by this, it is possible to prevent the film unit body 1 from being reused without the accuracy guarantee of repeated use. Although the embodiment shown in the drawings has been described above, the present invention can also be applied to a film unit with a lens that uses a film with a backing sheet for shading. Even in this case, the front surface 18a of the rib 18 comes into pressure contact with the back surface of the backing paper covering the back surface of the film and presses the front surface of the film against the film supporting surface 15, so that the rib 18 is simply attached to the back plate 3. It is effective not only for increasing the strength but also for controlling the position of the film surface at the exposure position. Further, the present invention can be used in a lens-equipped film unit in which the cartridge 20 and the film roll 23 are attached to the back plate 3 side to be assembled.

[0013]

[Effect of device]

 As described above, in the lens-fitted film unit of the present invention, the back plate that is assembled on the back surface of the unit body for light shielding is a plastic molded product, and the back surface of the film is held by this back plate to hold the curved focus of the film. In addition to integrally molding the curved part that holds it so that it conforms to the surface and the film roll control part that suppresses the film roll in the film chamber, also integrates the protruding ridges to increase the strength of the back plate itself. Therefore, not only can the film be correctly positioned in the focal plane without using a pressure plate, but also by preventing the film roll from unwinding, the stress at the time of unwinding does not reach the film positioned in the focal plane. Moreover, since the strength of the back plate is increased by the ridges, the back plate itself can be made thin, the thickness of the entire film unit with lens can be reduced, and the molding material for the back plate can be saved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a back plate of a film unit with a lens using the present invention.

FIG. 3 is a sectional view of an essential part of a film unit with a lens using the present invention.

FIG. 4 is an external view of a film unit with a lens of the present invention.

[Explanation of sign]

 1 Unit Main Body 2 Main Body Base 3 Back Plate 10 Exposure Frame 11 Film Roll Room 12 Patrone Room 15 Film Support Surface 18 Rib 20 Patrone 23 Film Roll

Claims (1)

[Scope of utility model registration request] 1. A support surface for supporting an exposure frame and a front surface of the film is formed behind the taking lens, a film chamber for accommodating a roll of unexposed film is provided on one side of the exposure frame, and the film chamber is provided on the opposite side. A film cartridge chamber for accommodating a film cartridge having a cartridge shaft to which one end of is attached, is formed in each of the unit body portion, and a back attached to the unit body portion in order to light-tightly close the back surface of the unit body portion. A plate, wherein the film rotates the patrone shaft so that the film patrone inside the film patrone chamber passes from the film chamber through the supporting surface of the unit main body and the inner surface of the back plate. A film unit with a lens that can be sent inside.