JP3197713B2 - 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 film unit with a lens, and more particularly, to a film unit with a lens capable of performing full-size and panoramic-size photographing on a single film.

[0002]

2. Description of the Related Art Recently, the horizontal side of a print is two times longer than the vertical side.
A panoramic camera for creating a wide panoramic print by changing the ratio more than twice as long has been provided. In this panoramic camera, for example, Japanese Patent Application No.
As proposed in Japanese Patent No. 153710, there is a type in which the exposure screen is switched between the full size and the panorama size even during the shooting of one film.

[0003] The mechanism for obtaining full-size and panoramic-size print photographs is attractive for performing a wide variety of photographing with a single camera. It was desired to be. In view of this, Japanese Patent Application No. 5-251942 filed by the present applicant proposes a film unit with a lens in which a pair of light-shielding plates are provided up and down freely inside a dark box constituting a photographic optical path. When the light-shielding plate is in the lying state, the light-shielding plate is in the retracted position retracted from the imaging optical path, so that exposure is performed in a full size of 24 mm × 36 mm (aspect ratio 1.5), In this case, since the light-shielding plate is in a panoramic position in which the light-shielding plate enters the photographing optical path, exposure is performed with a panoramic size of 13 mm × 36 mm (aspect ratio 2.8). Further, in conjunction with the switching of the exposure screen to the panorama size, the view range of the finder can be switched to an aspect ratio suitable for panoramic photography.

[0004]

However, in the above-mentioned film unit with a lens, even if the exposure screen for the film is of panoramic size, the photographing lens is for standard photographing, so that the photographing angle of view is narrow, and it is necessary to project a wide range. Must be away from the subject. As a result, even if a wide range is photographed, for example, a person or the like is photographed in a small size, and there is a problem that the effect and enjoyment of panoramic photographing are reduced by half.

Further, a general camera provided with a panorama switching mechanism is provided with a tele-wide switching mechanism, a zoom mechanism, and the like. A wide angle of view can be obtained by adjusting to. However, in the case of a film unit with a lens, which is user-friendly at a low price, it is impossible to employ a zoom mechanism or the like because of problems such as cost and storage space.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a film unit with a lens capable of photographing at a photographing angle of view suitable for panoramic photographing when switching from a standard photographing state to a panoramic photographing state. The purpose is to do.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a film unit with a lens according to the present invention sets the focal length of a photographing lens at the time of panoramic photographing in conjunction with an exposure screen switching mechanism or a view range switching mechanism. Is designed to be shorter than in standard shooting. This allows
At the time of panoramic shooting, shooting can be performed with a shooting angle of view suitable for panoramic shooting.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Film unit 2 with lens shown in FIG.
By sliding the operation knob 3 for switching the screen size, the film size of the film can be selected from either the full size or the panoramic size and the photographing can be performed.
The film unit 2 with a lens has a configuration in which the unit body is wrapped in an outer case 4. The outer case 4 includes a photographing opening 5, a shutter button 6, an operation knob 3, a strobe switch 7, a winding knob 8, a viewfinder. 9, an opening for exposing the charging completion lamp confirmation window 10, the number-of-photographs display window 11, the strobe light emission window 12, and the like to the outside is provided.

As shown in FIG. 3, the unit main body has a rear cover 15 on the back of the main body base 14 and a strobe unit 16 and a mechanical unit 17 on the front in a detachable manner. As shown in FIG.
Is detachably attached. The mechanical unit 17 includes an exposure providing mechanism 21 having an exposure screen switching mechanism 19 and a photographing lens switching mechanism 20.

An exposure frame 23 is integrally formed on the optical axis 5a of the main body base 14, and a patrone chamber 24 and a film roll chamber 25 are integrally formed on both sides of the exposure frame 23. Patrone room 24 and film roll room 25
International Standards (ISO: 1007-19)
A film with a 135 type patrone specified in (1979 version) is loaded, and is housed light-tight with the rear cover 15.

The exposure frame 23 is formed to have a size slightly larger than the full size, and has a curved shape so as to be convex toward the rear side with respect to the film feeding direction together with the film supporting surface 27 provided on the rear side. It has become. The rear cover 15 facing the film support surface 27 is formed with a film regulating surface 28 that is curved in the same manner as the film support surface 27. The mechanical unit 17 is removably attached to the front surface of the exposure frame 23 by nail coupling or the like.

The strobe unit 16 includes a strobe light emitting unit 30, a battery 31, an X contact 32, and the like.
By pressing the elastic flash switch 7 integrally formed on the front cover 18, the circuit of the flash board 16 a is closed via the contact plate 33, and charging of the main capacitor 34 is started. When the charging of the main capacitor 34 is completed, the charging completion lamp 35 blinks, and when the X contact 32 is turned on in conjunction with the operation of the shutter blade, a trigger signal is transmitted. When the trigger signal is obtained, strobe light is emitted from the strobe light emitting unit 30 through the strobe light emitting window 12.

As shown in FIG. 4, a finder objective window 37 and a photographing lens switching mechanism 20 are provided on the front surface of the front cover 18.
Is provided, and a ridge 39 is formed on the outer periphery so as to surround these. A ridge 39 is provided between the finder objective window 37 and the front opening 38.
Are provided, and a field-of-view range switching mechanism 41 incorporated in the front of the finder objective window 37 is provided.
Are slidable along the film feeding direction.

In front of the front cover 18, a ridge 39 is provided.
A cover plate 42 having the same shape as the outer peripheral shape is detachably attached by using a claw 42a. The cover plate 42 has a visual field opening 43 on the finder optical axis 37a and a long hole opening 44 for movably exposing the operation knob 3 to the outside.
And are provided integrally. In addition, a convex portion 45 is provided on the back surface beside the visual field opening 43.

The view range switching mechanism 41 includes an operation plate 47 integrally provided with a panorama view frame 47a having an aspect ratio of a panorama size and the operation knob 3, and a driven member 48 that slides in accordance with the operation plate 47. It is composed of Grooves 47b and 47c penetrating the operation plate 47 are formed above and below the panoramic field frame 47a of the operation plate 47. The driven members 48 are provided in the grooves 47b and 47c.
Engaging pieces 48b, 48 formed integrally with the supporting piece 48a
c is engaged from the back side. The engaging pieces 48b, 48c are provided with claw portions 48d, 48e at the tips. The claw portions 48d, 48e are pulled or abutted on the inner walls of the grooves 47b, 47c, so that the driven member 48 is formed.
Is driven by the operation plate 47.

In the lower part of the operation plate 47, two notches 49a,
49b is provided, and by engaging with the projections 40a, 40b formed on the upper surface of the rail section 40, the view range switching mechanism 41 is defined as a panoramic size and a full size. Notches 49a, 49b have protrusions 40a, 40b
When the operation plate 47 is slid to the left in the drawing, the driven member 48
e is pulled by the engagement between the grooves 47b and 47c of the operation plate 47 and slides to the left in the drawing. Then, the driven member 48
The concave portion 48f formed in the support piece 48a of the cover plate 42
Abuts on the convex portion 45 formed on the rear surface of the, and slide is prevented. In this state, as shown in FIG. 5A, both sides of the view opening 43 of the cover plate 42 are shielded by the sides of the operation plate 47 and the support pieces 48a of the driven member 48, so that the view range of the finder 9 is reduced. The aspect ratio is for full-size shooting.

The notch 49a of the operation plate 47 and the projection 40
b, that is, when the operation plate 47 is slid rightward in the drawing, the driven member 48
48e abuts against the inner walls of the grooves 47b and 47c of the operation plate 47, and is pushed to slide rightward in the figure. Then, the support piece 48a of the driven member 48 comes into contact with the ridge 39 formed on the front surface of the front cover 18, and the slide is prevented. In this state, as shown in FIG. 5B, the panoramic field frame 47a of the operation plate 47 is disposed behind the field opening 43 of the cover plate 42, the upper and lower sides are shielded, and the field of view of the finder 9 is panoramic. Aspect ratio.

The operation plate 47 is used for panoramic photography.
A cam 51 for linking the exposure screen switching mechanism 19 in conjunction with the movement to the position for full-size shooting.
Are provided integrally.

The mechanical unit 17 includes, as shown in FIG.
The exposure screen switching mechanism 19, the photographic lens switching mechanism 20, the exposure applying mechanism 21 and the like are incorporated in a dark box 53 for guiding only the subject light transmitted through the imaging aperture 5 formed in the cover plate 42 to the exposure frame 23. ing. The dark box 53 is provided with an exposure opening 54 provided in front of the optical axis 5a, a finder holding frame 55 provided above, and shafts 56, 5 to which a shutter mechanism and a film winding mechanism are attached.
7, 58, etc., which are integrally formed of a material such as plastic. The finder holding frame 55 has a U-shape with an opening facing upward, and an inverted Galilean eyepiece 59 and an objective lens 60 are respectively assembled from above toward the opening. This finder 9 is
The field of view is in accordance with the focal length of the panoramic photographing lens group of the photographing lens switching mechanism 20 described later.

The shutter mechanism and the film winding mechanism are
A shutter set cam 61 formed of plastic and rotatably inserted into a shaft 56;
1, a locking lever 63 and a metal driving spring 64 into which the shaft 57 is inserted, a kick lever 65 and a shooting number display plate 66 into which the shaft 58 is inserted.
And a shutter blade 67, a spring 68, and the like. A top plate 69 made of transparent plastic is attached to the upper part of the finder holding frame 55. The top plate 69 presses the eyepiece lens 59 and the objective lens 60 against the holding frame 55 and holds the shaft 58 and the shutter set cam 61 from above to prevent the space between the shafts from expanding. Further, a convex lens 69 a is provided integrally with the top plate 69, and is disposed above the number display displayed on the upper surface of the number-of-photographs display plate 66 to enlarge the number display recognized from the number-of-photographs display window 11. To make them visible.

As is well known, when the winding operation is performed by rotating the winding knob 8, the core of the patrone is rotated, and the film is transferred. By the transfer of the film, the shutter set cam 61 is driven to rotate via the sprocket 62, the kicking lever 65 is set to the charging position via the locking lever 63, and the number-of-photographs display plate 66 is advanced by one scale. When the release button 6 is pressed, the locking lever 63 is slightly rotated, the engagement between the locking lever 63 and the kicking lever 65 is released, and the arm portion 65a of the kicking lever 65 is urged by the drive spring 64 to move the shutter blade 6.
Kick off 7. The shutter blade 67 has a crank-shaped cross section in the optical axis direction in order to improve the thickness of the lens-fitted film unit 2, and the kicking position and the opening / closing position for opening and closing the exposure opening 54 are set in the optical axis 5a direction. Rocks in different planes. The shutter mechanism and the film wind-up mechanism described above have the same functions as those described in Japanese Patent Publication No. 2-32615, and a detailed description thereof will be omitted.

At the front of the shutter blade 67, an opening 70a is provided.
The shutter cover 70 on which is formed is attached. Also,
In front of the shutter cover 70, the press-fit pin 7 is rotatably supported by a shaft 71 formed on the front surface of the dark box 53.
The lens holder 72 retained in 1a is disposed. The lens holder 72 includes a panoramic photographing lens group 73.
And a lens barrel 7 in which a diaphragm opening 74a is formed.
4 and a lens barrel 76 that accommodates the standard photographing lens group 75 and has an aperture opening 76a are integrally formed.

The panoramic photographing lens group 73 includes photographing lenses 73a and 73b and a spacer 73 interposed therebetween.
c, and has a focal length of 25 mm. The standard taking lens group 75 includes a taking lens 75a,
75b and a spacer 75c sandwiched between them, and has a focal length of 32 mm. On the front surface of the lens holder 72, a lens cap 7 that covers the lens barrels 74 and 76 and holds the respective photographing lens groups.
7 is detachably attached. Further, the lens holder 72 is provided with an engagement portion 7 having a slit 79a formed therein, with which a drive pin 78 of an exposure screen switching mechanism 19 described later is engaged.
9 are formed integrally.

An intermediate lever 81 urged clockwise by a spring 80 is attached to the upper surface of the top plate 69. As shown in FIG. 6, the intermediate lever 81 is provided with a contact portion 81a which comes into contact with the cam 51 when the operation plate 47 is slid to the left panoramic position in the figure. Accordingly, the intermediate lever 81 is rotated counterclockwise against the spring 80, and operates the exposure screen switching mechanism 19 via the protruding piece 81b provided to protrude downward. The exposure screen switching mechanism 19 includes the above-described intermediate lever 8.
1 and a spring 80, an upper light shielding plate 82 supported by bearing holes 53a and bearing openings 53b in the dark box 53, a lower light shielding plate 83 also supported by bearing holes 53c and 53d in the dark box 53, Upper light shielding plate 82 through opening 53b
And a crank lever 84 connected thereto.

The upper light shielding plate 82 and the lower light shielding plate 83 have a spring 8
The free ends are urged in a direction in which the free ends spread with respect to the optical axis. The pins 82a formed on the upper light-shielding plate 82 and the protruding pieces 83a formed on the lower light-shielding plate 83 are in contact with each other, and the upper light-shielding plate 82 becomes narrower in the clockwise direction in FIG. When rotated in the direction, the lower light shielding plate 83 rotates in a counterclockwise direction, that is, a direction in which the free end side becomes narrower with respect to the optical axis. As described above, when the free ends of the upper and lower light shielding plates 82 and 83 are widened with respect to the optical axis, the exposure range of the film becomes full size, and conversely, the film is narrowed with respect to the optical axis. In some cases, the exposure range on the film is a panoramic size.

The crank lever 84 has a pin 84a that comes into contact with an end portion and a rotating shaft portion of the projecting piece 81b of the intermediate lever 81, and an engaging portion 79 formed on the lens holder 72.
And a drive pin 78 that engages with the slit 79a. When the operation plate 47 is slid to the left in the drawing, the cam 51 formed on the back surface of the operation plate 47 pushes the contact portion 81a of the intermediate lever 81 and rotates counterclockwise against the spring 80. Projection piece 81b of intermediate lever 81
Pushes the pin 84a of the crank lever 84 to rotate it clockwise. As a result, the upper light shielding plate 82 and the lower light shielding plate 83 are rotated, and the exposure range becomes a panoramic size. The movement of the drive pin 78 causes the lens holder 7 to move.
2 rotates clockwise, the panoramic imaging lens group 73 moves to the front of the opening 70a of the shutter cover 70, and the focal length becomes 25 mm.

When the operation plate 47 is returned to the full size position in the right direction in the figure, the intermediate lever 81 returns to the original position by the bias of the spring 80, and the crank lever 84 and the upper and lower light shielding plates 82, 83 The exposure range is turned to a full size by being rotated by the bias of the spring 86. Then, the lens holder 72 is rotated counterclockwise by the movement of the drive pin 78, and the standard photographing lens group 75 is again moved to the opening 7 of the shutter cover 70.
The lens moves to the front surface of Oa and the focal length becomes 32 mm. The above-described exposure screen switching mechanism is disclosed in Japanese Patent Application No. 5-251.
The function is the same as that described in the specification of Japanese Patent No. 942, and the detailed description is omitted here.

As shown in FIG. 7, the engagement between the drive pin 78 and the engagement portion 79 is made by a metal leaf spring 88 incorporated in the slit 79a.
As a result, as shown in FIG. 8, even when the drive pin 78 moves to be in a state of being obliquely engaged with the engagement portion 79, the engagement between the two is ensured.

Next, the operation of the above embodiment will be described.
The film unit with lens 2 of the present invention needs to determine whether to perform shooting in full size or in panoramic size before shooting, and to operate the operation knob 3 exposed on the front surface. For example, when the camera is currently in a full-size shooting state and is going to set it in a panorama-size shooting state, the operation dial 3 is slid to the right in the figure in FIG.

As shown in FIG. 4, the operation plate 47 provided with the operation knob 3 has notches 49a and 49b and projections 40a and 40.
b is released, and then the notch 49a engages with the projection 40b. Accordingly, the grooves 47b, 47 of the operation plate 47 are
The claw portions 48d, 48e of the engaging pieces 48b, 48c are pushed by the c, and the driven member 48 also slides rightward in the drawing. Then, the support piece 48a of the driven member 48 comes into contact with the ridge 39 formed on the front surface of the front cover 18, and the slide is prevented. In this state, as shown in FIG.
The panorama field frame 47a of 7 is the field of view opening 4 of the cover plate 42.
3 and the upper and lower sides are shielded and the viewfinder 9 is closed.
Is the aspect ratio for panoramic photography.

As shown in FIG. 6, when the operation plate 47 is slid to the left panorama photographing position in the figure, the intermediate lever 8 is moved.
1 is pushed by a cam 51 formed on the operation plate 47 and rotates counterclockwise in the drawing. Projection 81 of intermediate lever 81
b pushes the pin 84a of the crank lever 84 to rotate the crank lever 84 clockwise in the figure. By the rotation of the crank lever 84, the upper light shielding plate 82 connected through the bearing opening 53b rotates clockwise in the drawing, and the lower light shielding plate 83 rotates counterclockwise in conjunction with the rotation. Thus, the exposure screen for the film has a panoramic size. The movement of the drive pin 78 causes the lens holder 72 to rotate clockwise, and the panoramic photographing lens group 73 moves to the front of the opening 70a of the shutter cover 70 as shown in FIG. 25 mm.

When changing from the panorama size photographing state to the full size photographing state, the operation knob 3 shown in FIG.
Slide to the right in the figure. As shown in FIG. 4, the operation plate 47 on which the operation knob 3 is formed has a notch 49a and a projection 40b.
Is released, and then the notches 49a, 49b and the projection 4
0a and 40b are engaged. Accordingly, the claw portions 48 of the engaging pieces 48b, 48c are inserted into the grooves 47b, 47c of the operation plate 47.
d and 48e are pulled, and the driven member 48 also slides to the left in the figure. Then, the concave portion 48f formed on the support piece 48a of the driven member 48 comes into contact with the convex portion 45 formed on the back surface of the cover plate 42, and the sliding is prevented. In this state, as shown in FIG. 5A, both sides of the view opening 43 of the cover plate 42 are shielded by the sides of the operation plate 47 and the support pieces 48a of the driven member 48, so that the view range of the finder 9 is reduced. The aspect ratio is for full-size shooting.

As shown in FIG. 6, when the operation plate 47 is slid to the full-size photographing position on the right side in the figure, the pressing of the intermediate lever 81 from the cam 51 formed on the operation plate 47 is released, and the spring is released. It is rotated clockwise in the figure by the urging of 80. The pressing of the crank lever 84 from the intermediate lever 81 is also released, and the upper and lower light shielding plates 82 and 83 are pressed by the spring 86.
And move to full size position. Crank lever 8
When the drive pin 78 is moved by the movement of the lens 4, the lens holder 72 rotates counterclockwise in the figure, and the standard photographing lens group 75 is moved to the front of the opening 70 a of the shutter cover 70 as shown in FIG. It moves and the focal length becomes 32 mm.

In the above embodiment, the exposure screen switching mechanism 19
Although the photographing lens switching mechanism 20 is driven by using the crank lever 84 described above, it may be driven by the visual field range switching mechanism 41 as shown in FIG. This is a photographic lens switching mechanism 97 composed of a lens holder 90, a standard photographic lens group 91, a panoramic photographic lens group 92, and a lens cap 93 as in the above embodiment.
Further, a drive lever 94 and a spring 95 are assembled and supported by the mechanical unit 17. The drive lever 94 is
When the operation plate 47 is moved to a panorama size photographing position on the right side in the figure, the driving lever 94 is moved by the protruding piece 96. Is pressed against the bias of the spring 95, and the lens holder 90 rotates clockwise. As a result, as shown in FIG. 7B, the panoramic photographing lens group 92 is moved to the front of the shutter cover 70, and a panoramic size photographing state is set. When the operation plate 47 is slid to the left, which is the full-size shooting position, the lens holder 90 rotates counterclockwise by the bias of the spring 95, and the standard shooting lens group 91 moves to the front of the shutter cover 70. To enter the full-size shooting state.

In each of the above embodiments, the focal length is switched by switching all of the photographing lens groups.
For example, a configuration in which only the front lens or only the rear lens is switched to switch the focal length is also included in the present invention. In addition, a conversion range can be switched by incorporating a conversion lens into the panoramic field frame.

[0036]

As described above, in the film unit with a lens according to the present invention, the exposure screen switching mechanism for switching the exposure screen of the film from the full size to the panorama size, or the view range switching mechanism for switching the view range of the finder. In conjunction with this, the focal length of the taking lens is made shorter in panoramic shooting than in standard shooting, so that shooting can be performed with an appropriate angle of view in both standard and panoramic shooting.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a mechanical unit.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

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

FIG. 4 is an exploded perspective view showing a configuration of a front cover.

FIG. 5 is a front view of the mechanical unit.

FIG. 6 is an exploded perspective view of the mechanical unit as viewed from the rear side.

FIG. 7 is an explanatory diagram showing, in an enlarged manner, an engagement portion between a photographing lens switching mechanism and an exposure screen switching mechanism.

FIG. 8 is a cross-sectional view of a main part of an engagement portion between a photographing lens switching mechanism and an exposure screen switching mechanism.

FIG. 9 is a front view of a mechanical unit showing another embodiment of the present invention.

[Explanation of symbols]

 2 Film unit with lens 19 Exposure screen switching mechanism 20 Photographing lens switching mechanism 41 Viewing range switching mechanism 73 Panoramic photographing lens group 75 Standard photographing lens group

Claims (3)

(57) [Claims] 1. A photographing mechanism such as a photographing lens is incorporated.
Advance the film main body portion which is built in the lens-fitted photo film unit having a exposure window switching mechanism for switching the exposure window to the film during auto into one of the film between the full-size and panorama size, photographing light Lens lens that is rotatable in a plane perpendicular to the axis.
The lens holder is provided with a full-size shooting lens.
Lens with a shorter focal length than the full-size shooting lens.
A photographing lens for Norama is incorporated, and the lens holder is rotated in conjunction with the exposure screen switching mechanism to rotate each photographing lens.
A film unit with a lens, characterized in that the lens is inserted and removed on the photographing optical axis . 2. A photographing mechanism such as a photographing lens is incorporated.
Advance the film main body portion which is built in the lens-fitted photo film unit having a field of view switching mechanism for switching the field of view of the finder and the panorama size for full-size, rotatable in a direction perpendicular to the photographing optical axis Lens holder
The lens holder is provided with a full-size shooting lens
And a pano with a shorter focal length than the full-size shooting lens
And a photographic lens for llama. The photographic lens is rotated by rotating the lens holder in conjunction with the view range switching mechanism.
A film unit with a lens, which is inserted into and removed from the photographing optical axis . 3. A photographing mechanism such as a photographing lens is incorporated.
An exposure screen switching mechanism for switching a film exposure screen between a full size and a panorama size during photographing on a single film in a main body unit in which a film is built in advance;
In conjunction with this, in a film unit with a lens provided with a view range switching mechanism for switching the view range of the finder between full size and panorama size, a lens holder rotatable in a direction perpendicular to the photographing optical axis.
The lens holder is provided with a full-size shooting lens
And a pano with a shorter focal length than the full-size shooting lens
Incorporate a llama for photographing lens, said exposure window switching mechanism or the in conjunction with the field of view switching mechanism Ren,
A film unit with a lens, characterized in that a lens holder is rotated to insert and remove each photographing lens on a photographing optical axis .