JP3100812B2 - 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 in which an exposure range for a film can be freely switched.

[0002]

2. Description of the Related Art A film unit with a lens in which a film is built in advance in a unit body incorporating a simple photographing mechanism so that a photograph can be easily taken at any time, such as "Shaun Run Econo Shot" and "Sharun Run Super80."
“0” (both are trade names) are manufactured and sold by the present applicant and are widely used. This film unit with a lens has a very simple structure as disclosed in, for example, Japanese Patent Publication No. 2-32615, and after photographing, a DPE can be requested for each film unit in the same manner as a conventional photographic film. ing.

[0003] These film units with lenses are:
The unit main body in which the film and the patrone are incorporated is covered with a paper box for exterior use, so that the photographing operation can be performed with the paper box covered. The unit body includes a body base in which a film and a cartridge storage chamber are formed,
It comprises an exposure unit attached to the base of the main body, and a front cover and a rear cover which are respectively placed on the front and back surfaces of the base of the main body. Most of these are made of plastic molded products, and the used unit bodies are collected by the manufacturer, disassembled, and then reused as parts or as raw materials.

[0004] In recent cameras, an exposure range for a film is arbitrary between a standard exposure range (24 mm x 36 mm) and a panoramic exposure range (13 mm x 36 mm) during photographing on a single film. There is one that can be switched. A panoramic print that is wider than the standard print can be obtained from a film frame photographed in the panoramic exposure range, so that the user can enjoy two types of photography depending on the subject.

[0005] This type of camera is disclosed in Japanese Utility Model Laid-Open No. Hei 3-12243.
As disclosed in Japanese Patent Application Laid-Open No. 5 (1993) -2005, in addition to a mechanism for switching the exposure range for the film by moving a light-shielding plate into and out of the optical path after the taking lens, a state in which photography is performed under any of the exposure ranges. In order to inform the user of the presence or absence, a view range switching device is incorporated in the finder optical system.

[0006]

Attempts have been made to incorporate the above exposure range switching function into a film unit with a lens. However, when adding such a function to a film unit with a lens, if the field-of-view range switching device is incorporated in a finder optical system like a normal camera, the structure around the finder becomes considerably complicated, and the number of parts and the number of assembly steps are increased. And automatic assembly becomes difficult, resulting in a significant cost increase.

Further, since the conventional camera incorporates a mask plate or the like for switching the visual field range at a position in the viewfinder optical system where it is easy to observe, the camera can be switched between standard shooting and panoramic shooting within the viewfinder visual field. There is an advantage that it is easy to see the squid. However, if the view range switching device is provided outside the finder optical system from the above request,
It may be difficult to determine which switching state is in the viewfinder field alone, and there is a concern that shooting may be performed with the wrong switching state.

Further, on the front surface of the front cover of the lens-fitted film unit, there are provided holes for releasing a mold when the shutter button is integrally formed with the front cover, and hooks for hooking the front cover to the main body base. The blind hole was exposed, which was not only disadvantageous for the invasion of foreign substances, but also bad appearance when the paper box was removed.

The present invention has been made in view of the above circumstances, and simplifies the structure of a field-of-view range switching device used together with a film-exposure range switching mechanism to avoid an increase in cost. It is an object of the present invention to provide a lens-fitted photo film unit in which the set state can be clearly identified, and the appearance of the front cover can be easily improved.

[0010]

According to the present invention, in order to achieve the above object, a finder cover is further mounted on a front surface of a front cover, and between the front cover and the finder cover,
The view range is switched by sliding a view frame plate having a limit opening corresponding to the panorama exposure range. A standard opening corresponding to the standard exposure range is formed on one of the front cover and the finder cover.When the viewfinder range is determined through this standard opening, the light blocking plate is retracted from the optical path after the taking lens and the standard exposure range is set. Shooting is performed in the range. Then, when the center of each of the standard aperture and the restriction aperture coincides by sliding the field frame plate, the field of view is defined by the restriction aperture, and in this case, the light-shielding plate moves in the optical path and is moved under the panorama exposure range. Shooting is performed.

Further, a center index indicating the center of the restriction opening in the sliding direction of the field frame plate is provided on the surface of the field frame plate, and this is used as a reference index of the standard aperture. By matching, it is possible to identify that the finder field of view has been switched for panorama. In addition, by setting the center index as a projection that partially projects into the restriction opening, it is possible to confirm the switching state even in the viewfinder field.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of a film unit with a panorama switching lens embodying the present invention. FIG.
FIG. 3 is an exploded perspective view of a front cover portion of the film unit with a lens of FIG. 1, and FIG. 3 is an exploded perspective view of a photographing mode switching mechanism. Film unit with lens 2
The unit body 3 is covered with a paper box 4, and a release button 5, a photographing lens 6, a strobe light emitting unit 7, a strobe charge button 8, a number-of-shots display unit 9, and a photographing mode switching lever 11 are provided on the paper box 4. Each opening is exposed.

A front cover 12 for covering the front of the unit body 3
A release button 5 and a strobe charging button 8 are provided integrally, and a finder view restriction frame 13 and a cover plate 14 are attached to the front surface.
A shooting mode switching lever 11 is integrally provided at a lower portion of the finder visual field limiting frame 13, and is attached to the front cover 12 so as to be slidable left and right along a groove 20.

The front cover 12 is provided with a photographing mode mark 10a "N" indicating a standard photographing mode at a position where the knob of the photographing mode switching lever 11 is slid to the left in accordance with the setting of the photographing mode switching lever 11. However, a shooting mode mark 10b “P” indicating the panoramic shooting mode is displayed at a position where the knob is slid rightward. When the panorama mode is set by sliding the shooting mode switching lever 11 to the position of the shooting mode mark 10b "P", the viewfinder viewing restriction frame 13 changes the field of view of the viewfinder 16 to the field of view corresponding to the shooting range at the time of this panorama shooting. So to cover and limit.

The photographing mode marks 10a, 10b
Is displayed on the front cover 12 by printing in this embodiment, but may be displayed by, for example, attaching a pattern character or forming a concave portion by branding. In any of these methods, if the photographing mode mark portion is colored differently from other portions, or if only the photographing mode mark portion is subjected to a surface finish different from that of the surrounding portion by graining or the like, the photographing mode is further enhanced. Confirmation becomes easy.

A center marker 1 indicating the center of the finder visual field is provided at the lower center of the finder visual field restriction frame 13.
8 and a switching marker 19a for confirming that the shooting mode switching lever 11 has been operated to a predetermined position.
Are provided. A switching marker 19b is provided below the finder opening 21 provided above the cover plate 14.

The photographing mode switching mechanism 15 provided on the unit body 3 includes an aperture section 22 and an upper movable plate 23.
a, a lower movable plate 23b, a movable plate operation knob 24, a transmission knob 25, and the like. A transmission knob 25 urged clockwise by a coil spring 26 is mounted on the upper portion of the aperture section 22. One end of the transmission knob 25 is engaged with the finder view restriction frame 13 integrally provided with the shooting mode switching lever 11, and the other end is engaged with the movable plate operation knob 24 which is pivotally mounted on the side surface of the aperture section 22. ing.

Further, the movable plate operation knob 24 includes an upper movable plate 23a which is axially mounted inside the aperture portion 22,
It is engaged with the lower movable plate 23b. When the photographing mode switching lever 11 is set to the panoramic mode by these mechanisms, the finder visual field restriction frame 13 restricts the visual field of the finder 16 to the visual field corresponding to the panoramic mode, and the upper movable plate 23a and the lower movable plate 23b.
Rotates to restrict the optical path in the aperture section 22 to a range corresponding to the panorama mode.

The operation of the thus-configured film unit with lens will be described. Film unit 2 with lens set by photographer to standard shooting mode
When the shooting mode switching lever 11 is slid to the right to switch to the panorama mode, the transmission knob 2
5. The upper movable plate 23a and the lower movable plate 23b simultaneously rotate through the movable plate operation knob 24,
The optical path inside is narrowed to the range corresponding to the panorama mode.

At the same time, the shooting mode switching lever 1
The finder field limiting frame 13 integrated with 1 is slid rightward to cover a certain width above and below the finder opening 21 so that the field of view of the finder 16 becomes a field of view corresponding to the shooting range at the time of panoramic shooting. Finder 1
By making the field-of-view switching of 6 such a simple structure, it is possible to greatly reduce the manufacturing cost.

Also, when switching the field of view of the viewfinder 16, since the amount of slide operation of the photographing mode switching lever 11 is relatively long, the photographer does not slide the photographing mode switching lever 11 firmly to the right end, but accidentally slides the right side. If the photographing mode switching lever 11 is stopped short of the end, the upper movable plate 23a and the lower movable plate 23b limit the optical path in the aperture portion 22 to a half-sized size, and printing is performed in a normal developing laboratory. May be impossible.

However, since a switching marker 19a is provided at the center of the lower part of the finder visual field restriction frame 13, and a switching marker 19b is further provided at the lower part of the finder opening 21, as shown in FIG.
By visually checking whether the switching marker 9a matches the switching marker 19b, it can be easily confirmed whether the shooting mode switching lever 11 has been properly slid to the specified position, and an operation error of the shooting mode switching lever 11 is prevented. be able to.

Further, the front cover 12 is provided with a shooting mode mark 10a "N" indicating a standard shooting mode at a position where the knob of the shooting mode switching lever 11 is slid to the left in accordance with the setting of the shooting mode switching lever 11. However, since the shooting mode mark 10b “P” indicating the panoramic shooting mode is displayed at the position where the knob is slid rightward, the shooting mode marks 10a and 10b corresponding to the shooting mode switching lever 11 are also displayed. In addition, it is possible to prevent an erroneous operation of the shooting mode switching lever 11.

FIG. 5 shows an embodiment in which, out of the switching markers of the above-described embodiment, the switching marker provided in the finder visual field restriction frame is also used as the center marker indicating the center of the finder visual field. In a front view around the finder shown in FIG.
Indicates that the shooting mode has been switched to the panorama when the position matches the switching marker 34 provided in the
When the photographing mode switching mechanism is not completely switched, the center marker 32 is shifted to the left side of the switching marker 34, so that photographing failure due to a photographing mode switching error can be effectively prevented.

FIG. 6 is a front view of the vicinity of the finder in the embodiment of the film unit with a lens so that the photographing range in the panoramic photographing mode can be confirmed even when the view restriction frame is not set in the finder (standard photographing mode). . Viewfinder 4 for film unit 41 with lens
The finder glass 43 provided on the camera 2 has two indices 44 indicating a shooting range when the panorama shooting mode is set.
a, 44b are drawn.

In this way, when the photographer wants to compare and decide in which photographing mode the photographing mode is set, the photographing mode switching lever 45 is set to the standard photographing mode without performing visual comparison while switching between the standard and panoramic setting positions. 7, the photographing range 46 in the standard photographing mode and the photographing range 47 in the panoramic photographing mode can be easily compared and confirmed at a glance, as shown in FIG.

The indices 44a and 44b can be expressed by drawing a line on the surface of the finder glass 43.
Indices of the finder glass may be expressed by forming irregularities on the index portion when the finder glass is molded, or by coloring the linear irregularities.

FIG. 8 is a front view of the vicinity of the finder in the embodiment of the film unit with a lens so that the photographing range in the standard photographing mode can be confirmed even when the view restriction frame is set in the finder (panoramic photographing mode). is there. The finder field-of-view limiting frame 52 provided on the finder 51 so as to be movable left and right has upper and lower portions, which are only visible when photographing in the standard photographing mode, colored transparently.

As described above, the finder visual field limiting frame 52
And colored portions 53a and 53b corresponding to the standard photographing mode.
When the photographer wants to compare and decide in which photographing mode the photographing mode is set, the photographing mode switching lever 54 is set to the panoramic photographing mode without switching to the standard and panoramic setting positions and performing visual comparison. By simply looking into the area 55, as shown in FIG. 9, the range photographed only in the standard photographing mode can be visually recognized through the colored portions 53a and 53b, and the photographing ranges of the standard photographing mode and the panoramic photographing mode can be compared at a glance. become able to.

The colored portion of the finder visual field limiting frame may be formed by coloring a part of the transparent finder visual field limiting frame after molding.
It may be expressed by laminating colored plates or the like.

FIG. 10 is an exploded perspective view of the vicinity of the front cover of the embodiment in which the projecting pieces are projected when the film unit with the lens is set to the panoramic photographing mode. On the front of the front cover 61 of the film unit with lens,
Finder view restriction frame 62 and cover plate 63
Is attached. A photographing mode switching lever 64 is integrally provided below the finder visual field limiting frame 62 and is attached to the front cover 61 so as to be slidable left and right along a groove 65.

The finder field limiting frame 62 is integrally provided with a projecting piece 66 extending horizontally to the right. When the photographing mode switching lever 64 is set to the position of the photographing mode mark 67 “P” indicating the panoramic photographing mode, as shown in FIG. 66a protrudes. As a result, the photographer can easily recognize that the photographing mode switching lever 64 is in the panoramic photographing mode, and can prevent the photographer from accidentally photographing in a state other than the intended photographing mode.

FIG. 12 is an external perspective view of an embodiment in which the projecting piece is pivotally projected upward when the film unit with the lens is set to the panoramic photographing mode.
FIG. 4 is an explanatory view showing the vicinity of the protruding piece. A cover plate 73 is provided on the front surface of the front cover 72 of the film unit 71 with a lens.
A finder view restriction frame 74 is mounted between the camera and the cover plate 73 so as to be slidable right and left. A photographing mode switching lever 75 is integrally provided below the viewfinder viewing restriction frame 74.

A rectangular groove 76 is formed at the upper left of the front cover 71.
Is provided, and a marker 77 is rotatably mounted on an end of the groove 76. Further, the marker 76 is urged downward by a spring 78.

The film unit with lens 71
In the standard shooting mode, the viewfinder restriction frame 74 moves in the direction of arrow N in FIG.
Is sunk into the groove 76 by being rotated downward by the spring 78. When the photographer slides the photographing mode switching lever 75 to the right to perform panoramic photographing,
The finder viewing restriction frame 74 is inserted into the finder 79, and at the same time, the end of the finder viewing restriction frame 74 presses the corner of the end 76a of the marker 76, so that the marker 76 is opposed to the bias of the spring 78. It rotates upward and protrudes from the front cover 71.

Thus, the photographer can easily recognize that the film unit with lens 71 is in the panoramic photographing mode, thereby preventing photographing in a state other than the intended photographing mode by mistake.

FIG. 14 is an explanatory view showing a mechanism of the embodiment in which a display indicating the panoramic photographing mode is displayed on an opening provided in the rear cover when the film unit with the lens is set to the panoramic photographing mode. FIG. 15 is an explanatory diagram showing the display state. An interlocking member 82 that rotates in conjunction with the left and right movement of the finder viewing restriction frame 81 has a “P” indicating that the panorama shooting mode is set.
Is provided on the display unit 83. Viewfinder opening 85 in rear cover 84 of film unit with lens
On the left side, a panorama display opening 86 is provided.

The photographer operates the photographing mode switching lever 87 to move the finder view restriction frame 81 to the left.
When the film unit with the lens is switched to the panoramic photographing mode, the interlocking member 82 rotates counterclockwise, the photographing mechanism is switched to the exposure range corresponding to the panoramic photographing mode, and the display unit 83 is moved to the panorama display opening 86. The position is moved to the position, and the “P” display on the display unit 83 is displayed on the panorama display opening 86.

Thus, when the photographer shifts his / her gaze to the finder opening 85 at the time of photographing, if the film unit with the lens is in the panoramic photographing mode, the display unit 83 is provided in the panoramic display opening 86 immediately beside the finder opening 85. Can be visually recognized, so that it is possible to prevent accidental shooting in a state other than the intended shooting mode.

In this embodiment, the "P" mark is marked on the display section 83 of the interlocking member 82. However, the present invention is not limited to this.
The display unit 83 may be colored red, or the ground color of the interlocking member may be simply viewed from the panorama display opening.

[0041]

As described above, according to the film unit with the lens of the present invention, the finder cover is further mounted on the front surface of the front cover, and the panorama exposure range is provided between the front cover and the finder cover. By switching the field of view by sliding the field frame plate with the limited opening, it is possible to greatly reduce the cost of a film unit with a lens capable of switching the photographing screen size.

Further, a marker is provided in the finder opening of the front cover, and this marker matches with a marker provided on a field limiting plate for changing the field of view of the finder or a center marker indicating the center of the field of view of the field limiting plate. In this case, when the shooting mode switching mechanism is completely switched, it is possible to easily confirm whether or not the mechanism for switching the shooting mode has been reliably operated. It is now possible to effectively prevent shooting failure due to switching mistakes.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a film unit with a lens embodying the present invention.

FIG. 2 is an exploded perspective view of a front cover portion of the lens-fitted film unit shown in FIG.

FIG. 3 shows the film unit with a lens shown in FIG.
FIG. 3 is an exploded perspective view of a shooting mode switching mechanism.

FIG. 4 is a plan view showing a finder portion of the film unit with a lens shown in FIG. 1;

FIG. 5 is a front view showing a finder portion in a second embodiment of the film unit with a lens according to the present invention;

FIG. 6 is a front view showing a finder portion in a third embodiment of a lens-fitted film unit embodying the present invention.

FIG. 7 is an explanatory diagram showing a state when the finder of the embodiment of FIG. 6 is viewed.

FIG. 8 is a front view showing a finder portion in a fourth embodiment of the lens-fitted film unit embodying the present invention.

FIG. 9 is an explanatory diagram showing a state when the finder of the embodiment of FIG. 8 is viewed.

FIG. 10 is an exploded perspective view of the vicinity of a front cover in a fifth embodiment of a film unit with a lens according to the present invention.

FIG. 11 is an explanatory view showing the vicinity of a protruding piece in the embodiment of FIG. 10;

FIG. 12 is an external perspective view of a film unit with a lens according to a sixth embodiment of the present invention.

FIG. 13 is an explanatory view showing the vicinity of a projecting piece of the embodiment of FIG.

FIG. 14 is an explanatory view showing the vicinity of an interlocking member in a seventh embodiment of a film unit with a lens according to the present invention.

FIG. 15 is an explanatory view showing the vicinity of a finder on a rear cover of the embodiment in FIG. 14;

[Explanation of symbols]

 2 Film unit with lens 3 Unit body 11 Shooting mode switching lever 12 Front cover 13 View restriction plate 14 Cover plate 16 Finder 18 Center marker 19a, 19b Switching marker 20 Groove 44a, 44b Index 53a, 53b Colored part 66 Projection piece 66a Marked part

Continuation of the front page (56) References JP-A-5-281596 (JP, A) JP-A-63-95429 (JP, A) JP-A-2-71232 (JP, A) JP-A-4-104657 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 17/28 G03B 17/04 G03C 3/00

Claims (4)

(57) [Claims] 1. A light-shielding plate in a light path after a photographic lens, comprising: a main body base that houses a film and a patrone and has a shutter mechanism assembled thereto; and a front cover and a rear cover that respectively cover front and rear surfaces of the main body base. The exposure range for the film is switched between the standard exposure range and the panorama exposure range having an aspect ratio larger than the standard exposure range by inserting and removing the finder, and the viewfinder range is switched accordingly. In the film unit with a lens, a finder cover is attached to a front surface of the front cover, and a standard opening for providing a finder viewing range corresponding to the standard exposure range is formed on either the front cover or the finder cover, and the panoramic exposure range is formed. A field frame plate having a restriction opening corresponding to the front cover. The finder cover is slidably housed between the finder cover and the finder frame is slid to a position where the center of each of the standard opening and the limit opening coincides with each other to switch the finder viewing range for the panoramic exposure range, and the light shielding plate Is inserted into the optical path. 2. An opening edge constituting the limiting opening,
A center index indicating the center of the opening edge parallel to the sliding direction of the field frame plate is provided on the surface of the field frame plate, and the center index is matched with a reference index provided on the surface of the finder cover, so that the standard opening and the restricted opening are adjusted. 2. The lens-fitted film unit according to claim 1, wherein the centers are matched. 3. The lens-fitted film unit according to claim 2, wherein the center indicator is a protrusion provided so as to partially protrude from the edge of the opening into the limiting opening. 4. A main body in which a film and a patrone are stored and a shutter mechanism is assembled, a front cover and a rear cover for covering the front and back surfaces of the main body, respectively, and a finder cover attached to the front of the front cover. And a standard aperture provided on either the front cover or the finder cover, the exposure range for the film providing a finder viewing range corresponding to the standard exposure range, and a panorama exposure range having an aspect ratio larger than the standard exposure range. A corresponding restriction opening is formed, and a field frame plate slidably housed between the front cover and the finder cover, and is inserted into and removed from an optical path after the taking lens in conjunction with operation of the field frame plate. A light-shielding plate, provided between the field frame plate and the light-shielding plate; In a film unit with a lens comprising a linking member for inserting a plate into the optical path, a part of the linking member is linked to the operation of the field frame plate,
A film unit with a lens, wherein the film unit is exposed from an opening provided in the rear cover.