JP2001100369A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the enlargement of a contour shape without bending a photographing optical path when a photographing lens with a long focal distance is arranged. SOLUTION: The photographing lens 21 is arranged at a position being nearer to an object side and the focal distance thereof is long. An eyepiece 33 and an image forming surface 35 are arranged at an almost identical position on a photographing optical axis 21a. Besides, the photographing optical path between photographing lens 21 and the image forming surface 35 is set to be longer than a finder optical path between the eyepiece 33 and an objective lens 34. In order to prevent the contour shape from being enlarged, a front cover 15 is formed to have such a cross-section contour shape obtained by forming a level difference part 38 recessed by one step in the direction of the optical axis 21a on a finder objective window 37 side with space between a photographing window 36 and the finder objective window 37 as a boundary. Besides, a label 11 is stuck so that both ends 11a and 11b thereof in the winding direction do not overlap with the level difference part 38 as a boundary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film and a film unit with a lens having a built-in exposure mechanism.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Application Laid-Open No. Hei 7-287284, a lens-equipped film unit equipped with a telephoto photographing lens having a long focal length has been proposed.
This film unit with a lens has an optical path between the taking lens and the aperture in order to avoid an increase in the size of the unit due to a long back focus of the taking lens.
Two mirrors are incorporated so as to form a letter. For this reason, the size can be reduced, but the cost increases. Therefore, cost reduction is desired.

[0003]

However, if the optical path length is not bent, the photographing lens must be arranged close to the subject side, and therefore, the contour of the front surface of the unit greatly protrudes toward the subject side. And there is a disadvantage that the size of the unit cannot be avoided.

[0004] The film unit with a lens includes:
As described in Japanese Patent Application Laid-Open No. H10-260510, an exterior label that covers the center of the unit in a laver shape is attached so as to overlap on the bottom surface of the unit. As described in Japanese Patent Application Laid-Open No. 9-80696, this label has an effect of hiding an opening for exposing a mechanical mechanism, a concave portion for preventing sink marks, and the like formed on a front cover, a rear cover, and the like. . When such a label is attached to the lens-fitted film unit having a protruding front face as described above, a label that is longer than that of the protruding front face is required, resulting in an increase in cost.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and avoids an increase in the contour shape due to the arrangement of a photographing lens having a long focal length without bending the photographing optical path. It is an object of the present invention to provide a low cost film unit with a lens devised as described above.

[0006]

In order to achieve the above object, a film unit with a lens according to claim 1 includes:
On the front of the unit where the photographic window exposing the photographic lens and the finder objective window are formed, a step is provided in which the finder objective window side is recessed by one step in the optical axis direction between the photographic window and the finder objective window. It is a thing. Claim 2
In the film unit with lens described, the front, top,
It is provided with a label stuck in a strip shape on the back surface and the outer periphery along the bottom surface, and the label is stuck so that both ends do not overlap with a step portion as a boundary.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Film unit 10 with lens
Is composed of a single label 11 and a unit main body 12, as shown in FIG. The label 11 is affixed so as to cover the center of the unit body 12 in a laver winding shape. The label 11 has an opening 1 for exposing functional parts such as a number-of-photographs display window and a strobe charging completion display window.
3 and 14 are provided.

In the unit body 12, a shutter button 17 is provided at the upper left end of an outer cover composed of a front cover 15 and a rear cover 16, and a winding knob 18 is provided at the rear left end.
However, a strobe light emission window 19 is provided at the upper right of the front, and a strobe charge switch 20 is provided below the strobe light emission window.

As shown in FIG. 2, a known exposure unit 23, a strobe unit 24, a main body base 25 having a cartridge chamber and a film storage chamber, and a photographic film cartridge 27 are provided inside the outer covers 15 and 16, as shown in FIG. Is built-in. The exposure unit 23 is a unit formed by integrally incorporating the photographing lens 21, the shutter button 17, a finder optical system, a shutter charging mechanism, a shutter mechanism, a film counter mechanism, a film unwinding mechanism, and the like. It is detachably attached to.

The rear cover 16 is provided with a pull-top type opening / closing lid 28. The opening / closing lid 28 is a lid that is opened when the cartridge containing the photographed photo film is taken out, and a part thereof is covered with the label 11. Thereby, the locking of the opening / closing lid 28 is reinforced so that the lid 28 is not opened outside the developing station.

The front cover 15 and the rear cover 16 are detachably attached to the main body base 25 by elastically engaging locking claws. The label 11 includes a front cover 15 and a rear cover 16.
Is applied over both sides. For this reason, the front cover 15
And, the locking of the rear cover 16 is reinforced by the label 11.

As described in the related art, the front surface of the front cover 15 has an opening 29 for exposing a movable part such as a shutter mechanism and an opening 30 for a slide pin required for molding with a plastic material. Etc. are formed. These openings 29, 30 are hidden by the label 11.

The taking lens 21 has a focal length exceeding 24 mm. For this reason, as shown in FIG. 3, the photographing lens 21 is arranged at a position closer to the subject side. The back surface of the rear cover 16 is flat, and an eyepiece window 32 is formed on the surface. An eyepiece 33 is provided behind the eyepiece window 32. The eyepiece 33 and the imaging surface (film surface) 35 are arranged at substantially the same position on the imaging optical axis 21a, and the imaging optical path between the imaging lens 21 and the imaging surface 35 is an eyepiece. It is longer than the finder optical path between 33 and the objective lens 34.

Since the taking lens 21 is arranged at a position closer to the subject side, if the front cover is formed to have an inverted L-shaped cross section so as to cover the taking lens 21, the outline shape of the unit 10 becomes large. Therefore, in order to avoid enlargement, the shooting window 36
The front cover 15 is formed in a cross-sectional shape having a stepped portion 38 in which the finder objective window 37 side is recessed by one step in the direction of the photographing optical axis 21a with a boundary between the finder objective window 37 and the boundary. Then, the label 11 has both ends 11 in the winding direction.
a and 11b are stuck so as not to overlap each other with the step portion 38 as a boundary. In this embodiment, the front cover 1
5 is provided with a lens barrel 39 protruding a portion including the photographing window 36 toward the subject side, so that a photographing lens having a longer focal length, for example, a focal length of 100 mm can be arranged.

As shown in FIG. 4, the label 11 has an upper surface sticking portion 11c attached to the upper surface of the unit 10 to expose the number-of-photographs display window and the strobe charging completion display window as described above. An opening 40 for exposing the eyepiece window is formed on each of the openings 13 and 14 and on the back attaching portion 11d attached to the back. Then, one end 11a of the entire surface attaching portion 11e attached to the front surface of the unit 10.
Has a notch 11f for exposing the objective window 37.
A notch 11g for exposing the lens barrel 39 is formed at the other end 11b. Note that a two-dot chain line shown in FIG.

An adhesive is applied to the entire back surface of the label 11. The label 11 is supplied in the form of being attached to the release paper 41 at the time of attachment to the unit 10. Attachment is performed by peeling off the label 11 from the release paper 41 and attaching the back surface attaching portion 11 to the back surface of the unit 10 so that the opening 40 is aligned with the eyepiece window 32 with both ends 11 a and 11 b of the label 11 floating. Then, both ends 11a, 11
b is attached so as to be turned toward the upper and lower surfaces of the unit 10. Note that one end 11a of the label 11 is attached to the step 38, and the other end 1a of the label 11 is
1b may be attached such that the unit 1b is turned from the upper surface of the unit 10 through the back surface and the lower surface toward the front surface.

[0017]

As described above, in the film unit with a lens according to the present invention, the viewfinder objective window side is recessed one step in the optical axis direction on the front surface of the unit with the boundary between the photographing window and the viewfinder objective window. Since the step portion is provided, even if a photographing lens having a long focal length is arranged so that the photographing optical path becomes linear, the size can be reduced by the amount of the step portion.

Further, in the film unit with the lens according to the second aspect, since both ends of the label are attached so as not to overlap each other at the step, the length can be shortened by the step and the cost can be reduced. . Further, an opening for exposing the mechanical mechanism and an opening required for molding can be hidden by a label as in the related art.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a film unit with a lens according to the present invention.

FIG. 2 is an exploded perspective view of a unit main body.

FIG. 3 is a sectional view of the lens-fitted film unit from which the internal mechanism is omitted.

FIG. 4 is a development view of a label.

[Explanation of symbols]

 Reference Signs List 10 Film unit with lens 11 Label 11a One end 11b Other end 12 Unit body 15 Front cover 38 Step

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Noriko Katayama 2-26-30 Nishiazabu, Minato-ku, Tokyo Fuji Photo Film Co., Ltd. F-term (reference) 2H018 AA02 2H101 AA01 AA02

Claims (2)

[Claims] 1. A film unit having a built-in unexposed photographic film in advance and having a photographic lens, a finder objective window, and the like, wherein a photographic window exposing the photographic lens and a finder objective window are formed. A film unit with a lens, wherein a step portion is provided on the front surface of the unit such that the viewfinder objective window side is recessed by one step in the optical axis direction with a boundary between the photographing window and the viewfinder objective window. 2. The unit has an outer label attached in a seaweed winding shape on the outer periphery along a front surface, a top surface, a back surface, and a bottom surface, and both ends of the label in the winding direction are the steps. 2. The film unit with a lens according to claim 1, wherein the film unit is attached so as not to overlap at a part.