JP3215228B2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-equipped film unit having a simple photographing mechanism such as a photographing lens and a shutter and incorporating a film which has not been exposed beforehand. The present invention relates to a film unit with a telephoto lens.

[0002]

2. Description of the Related Art In order to easily take a picture even when a user does not carry a camera, the applicant of the present invention has stated that "I am taking a picture Hi
(Trade name) "and the like. This film unit with a lens includes, as disclosed in, for example, JP-A-3-39934 and JP-B-2-32615, a main body in which a simple photographing lens, a film winding mechanism, and a shutter mechanism are incorporated. An unexposed film is built in advance, and a front cover and a rear cover are attached to this.

[0003] Such a film unit with a lens is provided with a telephoto lens having a focal length of about 85 mm, as is known, for example, as "photographing telephoto (trade name)".
There is an image pickup apparatus that can take a subject far away farther (for example, Japanese Utility Model Laid-Open No. 2-104340). In general, when a telephoto lens is used, the optical path length after the taking lens becomes larger than that of a standard lens having a focal length of about 35 mm.
This film unit with a lens employs an optical system in which the optical path after the taking lens is bent into a Z-shape by two mirrors, so that telephoto shooting can be performed without impairing the compactness of the film unit with a lens. Like that.

[0004] To assemble such a film unit with a telephoto lens, a shutter board is attached to the upper front surface of a dark box integrally formed with the main body, and a stop tube for preventing stray light is dropped behind the shutter board. After placing the first mirror on the oblique opening, the upper part of the dark box is closed with a cover integrally formed with the mirror retainer. After the shutter charging mechanism and the film winding mechanism are installed beside the dark box, the posture of the main body is changed and the jig is fixed, for example, so that the aperture side faces downward. Next, the shutter blades are attached to the shutter board, and the second mirror is mounted on the oblique opening formed in the lower front part of the dark box. From above, a mirror holder is integrally covered with a cover integrally formed with a mirror holder. This cover does not use screws or adhesives,
It is fixed to the front of the dark box by hooks or notches. Thereafter, the photographing lens is placed on the lens receiver, the front cover is attached to the main body, and the photographing lens is carried into the dark room. After the film is loaded in the dark room, a rear cover is attached to the rear side of the main body.

On the other hand, recently, due to problems such as environmental conservation and reduction of industrial waste, recycling such as reuse of collecting and reusing the unit main body of a film unit with a lens has been carried out. In this recycling, for example, plastic molded parts are returned to raw materials such as resin pellets and reused so that they are not disposed of as industrial waste as much as possible.
Since the main body is protected by the front cover and the rear cover, there is almost no damage such as dirt and scratches. Further, since the photographing lens, the counter mechanism, the shutter mechanism, and the film winding mechanism are incorporated, re-inspection is performed. After that, those for which no abnormality is detected are reused as they are.

[0006]

As described above, in order to assemble a film unit with a lens for telephoto photography, two easily damaged mirrors are incorporated in the main body, and the posture of the main body is changed during the assembly. Therefore, it has been difficult to automate the assembly. Further, when the main body is damaged when the front cover and the rear cover are removed from the main body, the main body cannot be reused as it is.
Therefore, the counter mechanism, the shutter mechanism, the film winding mechanism, and the two mirrors attached to the main body are removed from the main body to reuse these parts. However, the counter mechanism, the shutter mechanism, and the film winding mechanism can be relatively easily removed like other film units with lenses. However, since the two mirrors are easily damaged, it takes time and effort to remove the mirror. There is a problem that the cost for performing the operation is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a film unit with a lens in which the suitability for automatic assembly is improved and the suitability for recycling is improved. .

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a film supply chamber having an opening for photographing, and a film supply chamber in which an unexposed film is stored on one side of the opening.
A resin main body integrally formed with a film take-up chamber for winding a photographed film into the other side of the opening is provided with a resin main body.
An aperture member that is provided so as to be freely inserted into and removed from a dark box portion, a photographic lens, a shutter mechanism, a counter mechanism, an optical finder, and an photographic optical path that form a Z-shaped photographic optical path by a plurality of reflecting means, and has a plurality of aperture openings having different aperture sizes. , Which is provided integrally with the aperture member, and determines whether or not a predetermined aperture is set in the photographing optical path.
It is inserted and removed forward, and a predetermined aperture opening is set in the shooting optical path
Color the viewfinder field of view with the specified color
A mechanical unit integrally provided with a photographing mechanism such as a filter is detachably assembled.

[0009]

[Function] The main photographing mechanisms, such as the dark box, photographing lens, shutter mechanism, counter mechanism, and optical finder, are unitized and detachably attached to the main body, so the photographing mechanism is assembled and tested on a separate line. After that, it can be attached to the main body very easily, and automation of assembly can be easily performed. In addition, since it is very easy to remove the unitized photographing mechanism from the main body, if the main body is damaged when disassembling the film unit with a lens, remove the photographing mechanism from the main body. Immediately after the inspection, it can be incorporated into a new main body, and the suitability for reuse is high. Also,
Insert and remove the filter in front of the viewfinder when the aperture is changed
Then, with the predetermined aperture set in the shooting optical path,
Because the finder field of view was colored in a predetermined color ,
The state of the aperture can be easily checked while looking through the viewfinder.

[0010]

FIG. 2 shows the external appearance of a film unit with a lens according to the present invention. In FIG. 2, the unit main body 10 is used while it is placed in a paper box 11; , A finder objective opening 13, a shutter button 14, a film counter window 15, and the like. Note that the finder objective aperture 13 is arranged at a position substantially equal to the height of the photographing lens 12.

An aperture change knob 16 for changing the aperture of the photographic lens 12 is slidably provided on the upper portion of the unit body 10, and can switch the photographic aperture between daytime shooting and night game shooting. . The “night game” is mainly a night game such as a baseball game or a soccer game using artificial lighting at night, but includes, for example, daylight shooting on a cloudy day. Also, on the upper surface of the paper box 11, two types of notation characters “daytime” and “night game” corresponding to switching of the shooting aperture, and a triangular mark serving as an index of the set position of the aperture change knob 16 are printed. I have. A winding knob 17 is provided at the rear corner of the unit body 10 to operate the shutter button 14 to take a picture and then wind the exposed film into the cartridge.

In FIG. 3, which is an exploded view of the unit main body 10, the unit main body 10 includes a main body 20, a front cover 21, and a rear cover 22. Main unit 20
Has a patrone room 25 for accommodating the patrone 24,
A film roll chamber 28 is provided for accommodating a film roll 27 drawn out of the patrone 24 and wound into a roll.

A patrone room 25 and a film roll room 28
Is integrally formed with the bottom plate 29 and the back plate 30. The back side of the back plate 30 is used as a support surface that supports the front surface of the film 26 that is passed between the patrone room 25 and the film roll room 28. A mechanical unit 31 is detachably mounted between the patrone chamber 25 and the film roll chamber 28 by means of a hook 32 or a notch. Back plate 3 to which this mechanical unit 31 is attached
In FIG. 0, a light-shielding wall 30b protrudes from the periphery of the exposure opening 30a so as to shield a gap between the back plate 30 and the mechanical unit 31.

As shown in FIG. 1, the mechanical unit 31
A finder 34, a shutter unit 35, a shutter charge counter mechanism, and the like are integrally attached to a dark box 33 to form a unit. In the dark box 33, a mirror 37 is attached to an opening frame 33a on the front surface, and a mirror 38 is attached to a similar opening frame formed on the rear side. As shown in FIG. Thus, a Z-shaped optical path can be obtained without a long optical path length. The finder 34 includes, for example, an objective lens 34a of a convex lens formed of plastic and an eyepiece 3 of a concave lens.
4b, and a Galileo-type optical finder comprising a finder tube 34c fixed to the dark box 33.

The shutter unit 35 is fixed to the opening at the upper part of the front surface of the mechanical unit 31 via the shutter board 39 by using a notch 41, a projection 42, a hook 43 and the like. Behind the shutter board 39, a cylinder 45 having a light shielding plate 44 for cutting obliquely incident light from outside the effective angle of view is incorporated. After assembling the cylinder 45, a cover 46 is put on the upper part of the mechanical unit 31. This cover 4
A protection plate 46a for covering the rear surface of the mirror 38 is formed integrally with the mirror 6. On the left side of the dark box 33, a counter plate 47,
A shutter charge counter mechanism including a shutter drive lever 48, a release lever 49, and the like is mounted.

The shutter board 39 has a circular opening 55.
And a rectangular opening 56 are formed, and a pin 57 is implanted below the opening 56. A shutter blade 58 is rotatably attached to the pin 57. An opening 60 is formed on the shutter blade 58 so that a projection 59 is exposed, and a projection 61 for hanging a spring is integrally formed. The distal end of the shutter drive lever 48 penetrates through the opening 56 of the shutter board 39, and then is inserted into the opening 60 of the shutter blade 58. Further, the shutter blade 58 closes the opening 55 of the shutter board 39 in a normal state.

A shutter cover 62 is attached to the shutter board 39 so as to cover the shutter blades 58. A circular concave portion 62 a is formed in the shutter cover 62, and the taking lens 12 is fixed to the concave portion 62 a by a lens pressing member 63. Three nails are formed around the lens pressing member 63, and the nails engage with locking holes formed around the concave portion 62a. The taking lens 12 is a single lens made of a transparent acrylic resin, and has a focal length of about 70 to 80 mm and an F number of about 11 to 14 as an example. A protective plate 64 is formed integrally with the shutter cover 62 so as to cover the back surface of the mirror 37. A spring hook projection 65 is formed at one end of the protection plate 64, and a spring 66 is hooked between the projection 65 and the projection 61 of the shutter blade 58. As a result, the shutter blade 58 is urged counterclockwise about the pin 57.

Between the shutter blades 58 and the shutter cover 62, there is provided an aperture plate 70 slidably moved along the groove 67a of the guide member 67. This diaphragm plate 7
0 has two types of large and small aperture openings 7 with different aperture sizes.
1, 72 (corresponding to, for example, F22 and F11, respectively). An aperture change knob 16 is formed integrally with the aperture plate 70 at the upper edge corner of the aperture plate 70. By sliding the aperture change knob 16, either one of the aperture openings 71 and 72 can be selectively exposed to the photographing optical path. Can be set in A click stop mechanism (not shown) is provided between the guide member 67 and the stop plate 70 to stop the stop plate 70 at a predetermined position when setting the stop openings 71 and 72 in the photographing optical path. ing. The guide 67 is formed with an opening 67b having the same diameter as the larger aperture 72.

At the end of the diaphragm plate 70, a filter 74 having a honeycomb structure is integrally formed. This filter 74
Is conspicuously colored in a range from yellow to red, for example, yellow. As shown in FIG. 5, when the aperture opening 71 having the smaller aperture size is set in the photographing optical path,
The finder visual field viewed from the eyepiece 34b is colored yellow, covering the front of the objective lens 34a of the finder 34. In addition, the diaphragm plate 70 has, for example, diaphragm openings 71 and 72.
The two parts are integrally formed of a black light-shielding resin and a filter 74 part of a yellow translucent resin.

A front cover 21 is attached to the front side of the main body 20. On the front surface of the front cover 21, the photographing lens 12
Finder objective aperture 1
3 are formed. Also, on the upper surface of the front cover 21,
In addition to the shutter button 14 and the counter window 15, a slit 77 through which the aperture change knob 16 projects and slides.
Are formed. On the lower surface of the shutter button 14, a lever for pressing the release lever 49 rightward in the drawing is integrally formed. The front cover 21 includes hooks 25 a and 27 a formed on the front surfaces of the patrone chamber 25 and the film roll chamber 28, and positioning pins 25.
b, 27b to be attached to the front surface of the main body 20.

The rear cover 22 that covers the back of the main body 20 is
The back plate 78 includes a back plate portion 78 and a bottom plate portion 79. The back plate portion 78 is provided with a film support surface 80 having a concave central portion as shown in the figure. The film support surface 80 supports the film 26 at the exposure position from the back side, and positions the patrone 24 and the film roll 27 at the left and right raised portions, respectively. The film supporting surface 80 is provided with a large number of minute projections, so as to reduce the friction when feeding the film.

The back plate 78 is further provided with a finder eyepiece opening 83 and an opening 84 for partially exposing the film winding knob 17. The finder eyepiece opening 83, when the unit body 10 is assembled,
It is aligned with the opening 85 formed in the main body 20 and communicates with the finder tube 34c to face the eyepiece 34b.
A base 86 for supporting the film roll 27 stored in the film roll chamber 28 is provided on the bottom plate 79. A take-out lid 87 for the patrone 24 is provided on the patrone chamber side of the bottom plate portion 79. The hook 88 is fitted into the groove 89 of the front cover 21 when assembling the unit main body 10.

In FIG. 4 showing a cross section of a main part of the mechanical unit 31, the optical axis 12a of the photographing lens 12 is folded into a Z-shape by mirrors 38 and 37, and then the main body 2
The film 26 is held between the rear surface of the back plate 30 and the support surface 80 of the rear cover 22, and reaches the film 26 at the exposure position positioned behind the exposure opening 30a. Since the light beam from the subject that has passed through the photographing lens 12 reaches the film 26 while spreading, the mirror 38 may be smaller in size than the mirror 37. Further, by tilting these mirrors 37 and 38 at the same tilt angle θ, for example, 59.6 °, the optical axis 12a that has entered the photographing lens 12 horizontally can be made to enter the film 26 horizontally.

The operation of the thus-configured film unit with lens will be described. The user first operates the film winding knob 17 to perform the initial feeding of the film 26. The sprocket rotates by engaging with the film perforation in conjunction with the film feed, whereby the counter plate 47 rotates. When the first frame of the film is sent to the exposure position, the film counter window 1 is opened.
In 5, the number of frames that can be photographed, for example, “24” is displayed. Also, at this point, the knob 17 is locked.
Further film feeding is prohibited.

In the case of daytime shooting on a sunny day, the aperture change knob 16 is set to the triangle mark "daytime". At this time, since the aperture change knob 16 is disposed on the upper surface of the film unit with the lens, the aperture change knob 16 can be easily changed without holding the film unit with the lens.
Can be operated. By operating the aperture change knob 16, the aperture aperture 71 having the smaller aperture size is moved to the optical axis 1.
2a and the filter 74 is set in front of the objective lens a. Looking through the viewfinder eyepiece opening 83 for framing, it can be confirmed that the viewfinder view is set to the daytime shooting mode because the entire viewfinder field is colored yellow.

Subsequently, when the shutter button 14 is depressed, the lever integrally provided therewith releases the release lever 49 as shown in FIG.
To rotate counterclockwise. As a result, the shutter drive lever 48 rapidly rotates counterclockwise, and its tip moves rightward in the opening 60 of the shutter blade 58. In the course of this movement, the projection 59 projecting into the opening 60 is kicked off, and the shutter blade 58 rotates clockwise by a certain angle against the bias of the spring 66, and then returns to the initial position by the bias of the spring 66. Return to As a result, the shutter blade 58 opens and closes at, for example, "1/125" seconds, and the photographing is performed. And
While the shutter blades 58 are open, the subject light flux that has passed through the photographing lens 12 is reflected by the mirror 38 and the mirror 37 and then forms an image on the film 26, so that exposure is performed.

When the shutter blade 58 opens and closes in this manner, the winding of the winding knob 17 is released, and the film can be wound. By rotating the knob 17, the exposed film 26 is rolled into the cartridge 24. Then, the unexposed film 26 is pulled out from the film roll 26 and sent to the exposure position. Following this film feed, the sprocket rotates, and when the film feed amount reaches just one frame,
The winding of the knob 17 is stopped again, and the film feeding is completed. The counter plate 47 moves by one scale during the film feeding. The sprocket makes one revolution by feeding the film one frame. The shutter drive lever 48 moves to the charging position in conjunction with the rotation of the sprocket,
Preparation for the next shooting is completed.

When shooting a night game such as baseball, the aperture change knob 16 is set to the triangle mark of "night game". As a result, the diaphragm plate 70 moves the guide 67
Is slid along the groove 67a, and the aperture opening 72 having a large aperture size is set in the optical axis 12a. At the same time, the filter 74 is retracted from the front of the objective lens 34a, and the finder visual field becomes a normal uncolored visual field.

In the embodiment described above, the finder tube is formed separately and attached to the dark box. However, the finder tube may be formed integrally with the dark box in advance.

[0030]

As described above, according to the film unit with the lens of the present invention, the main photographing mechanism including two mirrors is unitized, and this is detachably attached to the main body. After the photographing mechanism is assembled and tested on a separate line, the photographing mechanism can be easily attached to the main body, and the assembly can be easily automated. Further, even if the main body is damaged when the film unit with the lens is disassembled, the unitized photographing mechanism can be easily removed and inspected, and if there is no abnormality, it can be mounted on another main body and shipped. At this time, it is not necessary to attach the mirror, which is troublesome to handle, so that the suitability for reuse is extremely high. Also, the filter can be fine- tuned as the aperture changes.
The aperture in front of the camera, and set the desired aperture in the optical path.
Since the finder field of view is colored in a predetermined color in a state where the finder is set, it is possible to easily confirm the state of the aperture while looking through the finder.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the structure of a mechanical unit according to the present invention.

FIG. 2 is an external view of a film unit with a lens.

FIG. 3 is an exploded perspective view showing a structure of a unit main body.

FIG. 4 is a sectional view of a main part showing a structure of a mechanical unit.

FIG. 5 is an explanatory diagram showing a relationship between an aperture plate, a photographing optical path, and a finder according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 unit main body 12 photographing lens 16 aperture change knob 20 main body 21 front cover 22 rear cover 26 film 31 mechanical unit 33 dark box 34 finder 34 a objective lens 34 b eyepiece 35 shutter unit 37, 38 mirror 39 shutter board 58 shutter blade 67 guide member 70 diaphragm plate 71, 72 diaphragm aperture 74 filter

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-130727 (JP, A) JP-A-54-106225 (JP, A) JP-A-5-20056 (JP, U) JP-A-2-106 104340 (JP, U) Japanese Utility Model 1-57722 (JP, U) Japanese Utility Model 26-6357 (JP, Y1) Japanese Utility Model 39-15582 (JP, Y1)

Claims (1)

(57) [Claims] 1. A film supply chamber having an opening for photographing, on one side of which the unexposed film is stored, and a film take-up chamber for winding the photographed film into the other side of the opening. And a resin main body formed integrally with a dark box, a photographing lens, a shutter mechanism, a counter mechanism, and a Z-shaped photographing optical path formed by two reflecting means.
Optical viewfinder, is provided freely out into the photographic optical path, stop member aperture size were formed a plurality of different aperture, the diaphragm member provided integrally with, or predetermined aperture the photographic optical path is set Depending on whether
It is inserted and removed in front of the inductor, and a predetermined aperture
Set the viewfinder field of view to the specified color with
A film unit with a lens, wherein a mechanical unit integrally provided with a photographing mechanism such as a filter for coloring is detachably assembled.