JPH0241621Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a film unit with a lens.
In particular, the present invention relates to a photographic film packaging unit (hereinafter referred to as a "lens-equipped film unit") which is preliminarily provided with an exposure function for photographing.

[Prior art]

In conventional photography, it is customary to load film into a camera. However, only a small number of people carry a camera with them all the time, and it is inconvenient that they do not have a camera with them when they want to take a picture. In that case, you can purchase a lens-equipped film unit from your local store at a low price just like purchasing regular photographic film, and after shooting, request DPE for each lens-equipped film unit as you would with conventional photographic film. Very convenient if possible.

In order to meet such demands, the applicant has
We provided the lens-equipped film unit ``Utsurun Desu'' (product name), which is a film with a lens attached to it. This product uses 110 film loaded into a cartridge along with a backing paper. Therefore, when assembling this lens-equipped film unit, it is only necessary to press the exposure aperture on the cartridge side against the exposure frame formed in the unit body, thereby achieving efficient assembly. Furthermore, even when the cartridge is taken out from the unit main body prior to the developing process, the film remains in the cartridge in a light-shielded state, so there is no risk of fogging during this operation.

[Problem that the invention attempts to solve]

However, in order to be able to take high-quality photographs, if you try to construct a lens-equipped film unit with a large screen size, for example, using the most popular 135 film cartridge, the difference in cartridge structure may cause problems. It comes with a big problem.

That is, since such 135 film does not have a backing paper, it is necessary to protect the film from light when handling it.

On the other hand, with this lens-fitted film unit, when taking out the exposed film from the lens-fitted film unit after exposure at the photofinishing laboratory,
Using a back cover that can be opened and closed like that used in cameras increases the manufacturing cost of the unit body. Also,
Since it becomes possible to replace the film, there is a risk that the user may reuse it by inserting a new film. However, lens-fitted film units need to be manufactured at low cost and provided to users at low cost. For this reason, the accuracy is not guaranteed for repeated use, which may lead to unexpected trouble. To this end, if the back cover cannot be opened or closed, the unit will be damaged when taking out the film, thereby making it impossible to reuse the unit. However, if the unit is violently broken, the film that has been shot will be damaged, which is not desirable. Furthermore, when processing a large amount of film, a simple method of breaking is desired.

The present invention was devised to solve these drawbacks of conventional lens-fitted film units, and it not only makes it easier to remove photographed film from the used film unit body, but also makes it easier to remove used film from the used film unit. To provide a lens-fitted film unit in which a worn-out unit body is not reused.

[Means for solving problems]

In order to achieve the above object, the present invention incorporates an unexposed film in advance, exposes the film to light by operating a shutter means, and also fixes the main body and back surface of the unit. In the lens-fitted film unit, the film winding chamber in the unit main body includes:
A cartridge for winding the photographed film is arranged, and the bottom of this winding chamber has an opening, while a fork of a film winding dial means that engages with the winding shaft of the cartridge is provided above the winding chamber. The bottom opening is engaged with a lid that shields the winding chamber from light and is released when the cartridge is taken out, and the surface of the lid facing the winding chamber has a cover near the outer peripheral surface of the lower part of the cartridge. The unit is characterized in that a light-shielding protrusion is provided to cooperate with the bottom surface of the wall of the winding chamber to shield light, and the film is covered with an exterior case having an opening for exposing a predetermined portion of the unit containing the film.

[Effect]

According to the present invention, since the lid provided at the bottom of the cartridge can be removed by external force, the cartridge loaded in the film winding chamber can be easily taken out. Also, this lid has
A protrusion is provided that works with the bottom of the wall of the winding chamber that constitutes the cartridge chamber to shield the winding chamber from light.
The dark room where the cartridge is loaded can be reliably shielded from light. Furthermore, since the lid is locked to the unit and covered by the outer case, the lid will not open accidentally if the photographer accidentally drops it.

[Example of idea]

Preferred embodiments of the lens-fitted film unit according to the present invention will be described in detail below with reference to the accompanying drawings.

In this embodiment, an example will be described in which a lens-fitted film unit is used that uses 135 film with a cartridge, which is specified by the currently most popular international standard ISO 1007-1979 edition.

FIG. 1 shows the overall structure of a lens-fitted film unit according to the present invention, with reference numeral 10 representing the unit body, 12 a front cover, and 14 a back cover, which are manufactured by plastic molding. It is the main component of As will be described later, the front cover 12 and the back cover 14 are joined to the unit body 10 from the front and back, and then fixed by ultrasonic welding or the like, and the user can remove the film 16 built into the body 10 from inside the unit body 10. It is designed so that it cannot be removed.

As shown in FIG. 2, the film unit has a rectangular parallelepiped shape as a whole after assembly, and is covered with a paper box 17 as shown in FIG.
Photography operations can be performed via 7B, etc.

First, the unit main body 10 will be described. A cartridge storage chamber 20 and a rolled film storage chamber 22 are formed on a substrate 18 at predetermined intervals, and openings 20A, 22A is formed, so the film 16 is inserted into the cartridge storage chamber 20 from the bottom.
and the rolled film storage chamber 22. In the film unit according to the present invention,
The film 16 is pulled out from the cartridge 24 in advance, and after the photographing operation, the photographed films are sequentially stored in the cartridge 24. For this reason, film 16
is stored in the cartridge 24 and loaded into the cartridge storage chamber 20, and then wound up and stored in the storage chamber 22 in a rolled state. Or,
The film 16 may be unwound from the cartridge 24 in the dark room, made into a roll state 26, and then loaded into the storage chambers 20, 22 from the bottom of the unit main body.

A planar connecting portion 25 is provided between the cartridge storage chamber 20 and the rolled film storage chamber 22 of the unit body 10, and an exposure frame (not shown) is formed in this connecting portion 25. Patrone storage room 20,
A rectangular frame 28 is formed around the rolled film storage chamber 22 and the connecting portion 25.
An opening communicating with openings 20A and 22A is formed in the lower surface of the holder 20 to load the film 16 from below. A sealing protrusion (not shown) is formed on the surface of the frame 28 facing the back cover 14.
A winding knob 30 is pivotally supported in the upper part of the cartridge storage chamber 20, and a fork (not shown) is formed on the rotating shaft of the winding knob 30, and is adapted to engage with a spool shaft 32 of the cartridge 24. . Therefore, by rotating the winding knob 30 in the direction of the arrow in the figure, the photographed film 16 is stored from the rolled film storage chamber 22 into the cartridge 24.

Further, the unit body 10 is provided with a photographing mechanism including a photographic number display plate 34, a winding lever 36, a shutter lever 38, a shutter blade 40, and the like.

The shutter blade 40 opens and closes the photographing aperture 42 shown in FIG. 1 during the shutter release operation. A plate-shaped lens holder 44 is provided on the front surface of the shutter blade 40. A hole 46 is formed in the lens holder 44 at a position corresponding to the opening 42, and a plastic photographing lens 48 is disposed in the hole 46.

Next, the front cover 12 will be explained. The upper plate 60 of the front cover 12 has an opening 62 for a shutter button.
is formed, and a shutter button 64 whose upper surface is curved upward and slightly protrudes from the upper surface of the unit is disposed in this shutter button opening 62. Since the shutter button 64 has sloped surfaces on both sides, it can be inserted smoothly into the paper box 17 (see FIG. 4). When the shutter button 64 is pressed down, the shutter lever 38 of the above-mentioned photographing mechanism and the like are operated. Furthermore, a window 66 for displaying the number of shots taken is formed in the upper plate 60, and the number of shots taken on the display board 34 is displayed in this window 66. A viewfinder light-shielding tube 70 is formed on the front surface 68 of the front cover 12. Furthermore, a circular hole 72 for photographing is formed in the front surface 68, and this circular hole 72 is formed so as to be located on the optical axis of the photographing lens 48. Furthermore, rectangular small holes 76, 76 are formed on both the left and right sides of the photographing opening 72. The rectangular small holes 76, 76 are formed at positions corresponding to the locking claws 78, 78 formed on the unit body 10. It is used for temporary fixing when connecting the unit main body 10 to the front cover 12. Further, in the lower left portion of the front cover 12, there is formed a substantially arc-shaped recess 79 and holes 12A, 12A on both sides of this recess 79.

Next, the structure of the back cover 14 will be explained. Back cover 1
4 is composed of a back plate 80 and a bottom part 82. A finder opening 84 is formed in the back plate 80,
This viewfinder opening 84 is formed at a position corresponding to the light-shielding tube 70 of the front cover 12. Further, a horizontally long opening 86 is formed in the back plate 80, and this opening 86 is used to close the winding knob 3 after assembly, as shown in FIG.
0 is exposed, and the winding knob 30 can be rotated from the outside of the back plate 80. Furthermore, back plate 8
0 is formed with a curved film support surface 88,
When the winding knob 30 is rotated, the film 16 moves along the film support surface 88.

On the other hand, when the back cover 14 is attached to the unit body 10, the bottom part 82 of the back cover 14 has an opening 20A located below the base plate 18 and formed at the bottom of the cartridge storage chamber 20 and the rolled film storage chamber 22. ,22
It will cover A. The bottom portion 82 is divided into a lid 100 and a bottom plate 102, each having a light shielding groove 108 having a shape similar to the shape of the cartridge projected toward the bottom surface. The lid 100 is formed integrally with the back plate 80 and is rotatable via a hinge portion 104, so that the lower surface of the opening 20A of the cartridge storage chamber 20 can be opened and closed. A pair of locking claws 106, 106 are provided at the tip of the lid 100.
is formed, and this locking pawl 106 is inserted into the hole 12A of the front cover 12 as shown in FIG. 3 when the lid 100 is closed.
It is now locked in place. When the lid 100 is open, the protrusion 109 between the claws 106 and 106 is located under the recess 79 of the front cover 12. Furthermore, the lid 100 has protrusions 101 and 103, and a light-shielding groove 108 is formed between them.
As shown in FIG. 3, the bottom surface 20B of the winding chamber wall, which is the bottom surface of the cartridge storage chamber (film winding chamber) 20 of the unit 10, is fitted into the cartridge storage chamber 20, as shown in FIG. Article 101, 10
3 to block light. In addition, the hinge shaft 1 of the lid 100
There is a rectangular step 11 near the back side near 04.
0 is formed to be slightly raised, and the bottom surface of the cartridge 24 is abutted and supported by this stepped portion 110.

A groove 89 is formed on the periphery of the film support surface 88, and the protrusion of the unit main body 10 fits into this groove 89, so that the cartridge storage chamber 20, the rolled film storage chamber 22, and the exposure frame are The light will be blocked. Therefore, after the film 16 is stored between the cartridge storage chamber 20 and the roll storage chamber 22 of the unit main body 10, when the back cover 14 is pushed in, the film 16 is stored in the main body 10 in a light-tight state. .

Furthermore, in general cameras, the field of view ratio of the viewfinder is usually around 80%. However, when the screen size of the film is as large as 24 x 36 and the thickness t of the lens-equipped film unit is large, if you try to increase the field of view ratio without using a finder lens, the viewfinder opening 70 of the front cover 12 will become very large. It gets bigger.

In the lens-equipped film unit according to the present invention, in order to prevent the aperture 70 from becoming large as shown in FIG. For example, 50%), and the left and right dimension of the opening 84 x
The dimensions are set so that when shaken to its fullest extent, it will reach approximately 100%, including the hatched portion in Figure 5.

In this case, how to determine the left and right dimension x of the opening 84 is as follows: n・tan18/f=X/2+Y/2/unit thickness t From x=2n・tan18/f・ty All you have to do is decide.

n: field of view ratio y: left and right dimensions of the viewfinder opening 70 In order to increase the field of view ratio, as shown in FIG. It can be achieved.

According to the lens-fitted film unit of the present invention constructed as described above, when the front cover 12 is pushed into the unit body 10 during assembly, the locking claws 78, 78 engage with the holes 76, 76 of the front cover 12. The front cover 12 is then stopped. In this state, the film 16 is loaded into the unit body 10 through the openings 20A and 22A on the lower surface of the unit body 10. Next, when the back cover 14 is connected to the unit body 10, the protrusion of the unit body 10 fits into the groove 89 of the back cover 14, and the cover 100 is closed, whereby the film 16 is stored in the film chamber in a light-tight manner. That will happen. Next, an ultrasonic horn is pressed against the side edges 14A and 14B of the back cover 14, and the back cover 14 and the unit body 1 are
0 and the front cover 12 are welded.

On the other hand, when the release button 64 is operated in the lens-equipped film unit, the shutter blade 40
is opened and closed, and the film 16 located in the exposure frame is exposed. As mentioned above, release button 6
The central part of the shutter release button 4 is curved and protrudes, so the photographer does not have to press his or her finger too deeply when pressing the button, making it easier to operate the shutter release. After that, when the winding knob 30 is rotated, the cartridge shaft 3
2 rotates, and the exposed film 16 is stored in the cartridge 24. At the same time, the next film frame is supplied from the film storage chamber 22 to the exposure frame, and the display plate 34 is rotated accordingly.
The shutter charge is completed, and preparations for shooting are completed. Photographing is then performed by repeating this operation.

In this invention, for safety, the cartridge 24 is
Since the stepped portion 110 is provided so as to be abutted and supported by the film unit 10, even if the film unit is dropped, most of the weight at the time of impact will be supported by the stepped portion 110, and furthermore, the weight will be supported by the paper box covering the unit from the outside. Lid 10
0 is relaxed and the locking claw 106 of the lid 100
can be prevented from coming off from the unit main body 10.

After all frames have been photographed, submit them as-is to a processing shop. At the photo lab, there are 100 lids.
Push the protrusion 106 through the hole 12A to open the lid, or push the protrusion 109 located under the recess 79 downward to open the lid, take out the cartridge 24, and perform the conventional developing and printing processes to create negatives and prints. The photo is returned to the user. Normally, it is convenient to have the protruding piece 109 removed by pushing it, and if it does not come off, the claw 106 can be further pushed backward through the hole 12A. The position of the lid is not limited to the bottom surface, but may be provided on the back surface.

The sensitivity of the film used in this invention is
Any one of ASA100, 200, 400, 1000, 1600 etc. may be used.

[Effect of idea]

As explained above, according to the present invention, since the lid provided at the bottom of the cartridge can be removed by external force, the cartridge loaded in the film winding chamber can be easily taken out.
Further, since this lid is provided with a protrusion that blocks light in cooperation with the bottom surface of the winding chamber which becomes the cartridge chamber, it is possible to reliably block light from the dark room in which the cartridge is loaded. Furthermore, with this lid locked to the unit,
Since it is covered by an outer case, the lid will not open accidentally if the photographer accidentally drops it.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a lens-equipped film unit according to the present invention, FIG. 2 is an assembled perspective view of the lens-equipped film unit, and FIG. 3 is a sectional view showing the opening/closing structure of the cartridge chamber of the film unit according to the present invention. Fig. 4 is a perspective view showing the state in which the unit is placed in a paper box, Fig. 5 is an explanatory view showing the viewfinder field of view,
FIG. 6 is a perspective view showing a modified example of the finder. 10...Unit body, 12...Front cover, 14...
Camera back, 20... Film take-up chamber, 20B... Bottom, 2
4...Patrone, 100...Lid, 101...Protrusion, 1
03... Projection, 104... Hinge portion, 106... Locking claw, 108... Light shielding groove, 110... Step portion.

Claims (1)

[Claims for Utility Model Registration] (1) The unit contains an unexposed film in advance, and the film is exposed to light by operating a shutter means, and the main body and rear part of the unit are fixed together. In the lens-equipped film unit, the film winding chamber in the unit main body includes:
A cartridge for winding the photographed film is arranged, and the bottom of this winding chamber has an opening.
On the other hand, above the winding chamber is provided a fork of a film winding dial means that engages with the winding shaft of the cartridge, and the bottom opening has a lid that shields the winding chamber from light and is released when the cartridge is taken out. A light-shielding protrusion is provided on the surface of the lid facing the winding chamber near the outer circumferential surface of the lower part of the cartridge for blocking light in cooperation with the bottom surface of the wall of the winding chamber. 1. A film unit with a lens, characterized in that the unit is covered with an exterior case having an opening that exposes a predetermined portion of the unit. (2) The lens-equipped film unit according to claim 1, wherein a portion of the lid near the rear surface facing the winding chamber is slightly raised.