JP2001290206A - Film unit with lens and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a photographing lens in an optical axis direction without utilizing a front cover by making the front cover common in the case of manufacturing plural kinds of film units with a lens. SOLUTION: This film unit with a lens is constituted by attaching the front cover to which a 1st armor member and a 2nd armor member shown as follows can be attached and the 1st armor member to a 1st unit main body having at least a 1st photographing lens: the 1st armor member can be attached to the 1st unit main body and a 2nd unit main body having at least a 2nd photographing lens from the front, has an aperture part for the 1st photographing lens corresponding to the angle of view of the 1st photographing lens and is provided with a projecting part abutting on the 1st photographing lens in the optical axis direction around the back surface side of the aperture part for the 1st photographing lens and the 2nd armor member has an aperture part for the 2nd photographing lens corresponding to the angle of view of the 2nd photographing lens and is provided with a projecting part abutting on the 2nd photographing lens in the optical axis direction around the back surface side of the aperture part for the 2nd photographing lens.

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 which can be positioned in an optical axis direction by using an exterior member for photographing lenses having different focal lengths and the like, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In some cases, a plurality of types of lens-equipped film units are manufactured by using photographing lenses having different focal lengths and using other photographing mechanisms as common as possible. In this case, an opening for the photographing lens is provided in the front cover to be mounted from the front, but if the focal length is different, the angle of view will be different, and the size of the opening will be different according to the angle of view. Will be. In addition, a projection may be provided at the rear of the front cover, and the projection may hold the photographing lens in the optical axis direction. However, if the focal length of the photography lens differs, the length of the projection also differs. Therefore, the front cover must be non-common.

[0003]

However, the front cover is one of the largest components among the components of the film unit with the lens, and has a complicated shape, so that the cost of the mold for molding is very high. Expensive. Therefore, it is desirable to use the front cover in common as much as possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is intended for manufacturing a plurality of types of film units with lenses by using photographing lenses having different focal lengths and the like.
The front cover is used in common to save expensive mold costs, and the photographic lens is held in the optical axis direction without using the front cover.
It is another object of the present invention to propose a film unit with a lens capable of sufficiently distinguishing each other in appearance, and a method for manufacturing the same.

[0005]

The above object is achieved by any of the following means.

A first lens having at least a first taking lens
A first photographing lens opening that can be attached to the unit body from the front with respect to the first unit body and the second unit body having at least the second photographing lens, and that corresponds to the angle of view of the first photographing lens. A first exterior member having a projection that comes into contact with the first photographic lens in the optical axis direction around the back surface side of the first photographic lens opening, and an angle of view of the second photographic lens A second exterior member having a second photographic lens opening corresponding to the second photographic lens, and having a projection abutting on the second photographic lens in the optical axis direction around a rear surface side of the second photographic lens opening. A film unit with a lens, characterized by comprising a front cover to which can be attached and the first exterior member.

A first lens having at least a first taking lens
A first photographing lens opening that can be mounted from the front with respect to a unit body and a second unit body that has at least a second photographing lens and that corresponds to an angle of view of the first photographing lens; A first exterior member provided with a projection in contact with the imaging lens in the optical axis direction on the back surface side of the first imaging lens opening, and a second imaging lens corresponding to an angle of view of the second imaging lens A front cover having an opening for the second exterior member having a projection in contact with the second photographic lens in the optical axis direction around the rear surface of the second photographic lens opening; Mounting the first unit body from the front, mounting the first exterior member to the front cover, and mounting the protrusion provided around the rear surface side of the first photographing lens opening to the first photographing lens. Contacting the optical axis in the direction of the optical axis. Method of manufacturing a lens-fitted film unit according to claim Rukoto.

A first lens having at least a first photographing lens
A first photographing lens opening that can be mounted from the front with respect to a unit body and a second unit body that has at least a second photographing lens and that corresponds to an angle of view of the first photographing lens; A first exterior member provided with a projection in contact with the imaging lens in the optical axis direction on the back surface side of the first imaging lens opening, and a second imaging lens corresponding to an angle of view of the second imaging lens A front cover having an opening for the second photographing lens having a projection in contact with the second photographing lens in the optical axis direction around the back side of the opening for the second photographing lens. Mounting the first exterior member; and mounting the first exterior member from the front with respect to the first unit body.
With the front cover with the exterior member attached, the first cover
Contacting the projection provided around the back surface of the opening for the taking lens with the first taking lens in the optical axis direction.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a perspective view showing a state before the first exterior member is mounted on the first unit body, FIG. 2 is a perspective view showing the first exterior member mounted on the first unit body, and FIG. FIG. 4 is a partially enlarged cross-sectional view showing the first exterior member attached, FIG. 4 is a perspective view showing the second unit body before the second exterior member is attached, and FIG. 5 is a perspective view showing the second unit body attached with the second exterior member. 6 is a partially enlarged cross-sectional view in which a second exterior member is mounted on the second unit main body.

In FIG. 1, the first unit main body is not shown because it is covered by a front cover 11 and a rear cover 12 from the front and rear. A mechanism is mounted and an unexposed 135 film is loaded. When the film is exposed by photographing, a photographing frame of a standard size having a long side of 36 mm and a short side of 24 mm is formed by a photographing frame provided in the first unit main body.

An opening 11a for a photographing lens is provided at the front center of the front cover 11, and the first photographing lens L1 and the periphery thereof are exposed. A finder opening 11b is provided above the taking lens opening 11a. In addition,
The finder opening 11b is formed slightly larger than the size that defines the field of view of the finder. A first exterior member 2 described later is provided on the left and right of the taking lens opening 11a.
And a locking hole 11c for locking the locking claws 2c, 4c provided on the second exterior member 4.

A flash light emitting unit 13 is provided to the right of the finder opening 11b, and a flash switch operating lever 14 is provided below the flash light emitting unit 13.

A release button 15 and an indexer window 1 are provided on the upper surface.
6 and a strobe charging display window 17 are arranged, and a hoisting knob 18 is arranged to protrude from the rear surface.

Reference numeral 2 denotes a first exterior member, which has a first imaging lens opening 2a through which a light beam having an angle of view slightly larger than the angle of view of the first imaging lens L1 can enter. Above the section 2a, a first finder opening 2b that is set to about 80% of the photographing screen to define the field of view of the finder.
have. And two locking claws 2c provided on the back surface
Into the locking hole 11c of the front cover 11 to lock the first
By attaching the exterior member 2 to the front cover 11, FIG.
As a result, the film unit 1 with the first lens capable of photographing on a standard size screen is completed.

Here, when a strobe is built in, the strobe light emitting section 13 is generally arranged at the upper right when viewed from the front. For this reason, a circuit component for the strobe is provided inside the strobe light emitting section 13. It is desirable to arrange. Therefore, the first photographing lens L1 is disposed to the left from the center. For this purpose, the wall 2 protrudes forward so as to surround the first photographing lens opening 2 a of the first exterior member 2.
d, the first lens-equipped film unit 1 during shooting.
Is held, the fingertip of the right hand is prevented from entering the angle of view of the first photographing lens L1.

Next, the shape of the rear portion of the first exterior member 2 will be described with reference to FIG. The first photographing lens L1 is a two-lens standard lens, and includes a first lens L11 and a second lens L12.
And is held by a lens base plate 31 mounted on the first unit body. The lens ground plate 31 is provided with about two locking claws 31a to lock the end L11a of the first lens L11 and hold the first photographing lens L1 in the optical axis direction. However, the locking claw 31a is not the first photographing lens L
It is not sufficient in terms of strength just to keep the No. 1 from falling off in the manufacturing process. Therefore, a projection 2e is provided at the rear of the first exterior member 2 to escape the locking claw 31a, and the projection 2e is brought into contact with the end L11a of the first lens L11 to move the first photographing lens L1 in the optical axis direction. keeping. As a result, even if vibration or impact is applied to the first lens-equipped film unit 1, the first photographic lens L1 is reliably held while maintaining its performance.

Before the first exterior member 2 is mounted, the engaging claws 31a and the peripheral portion of the first photographing lens L1 are exposed and unsightly. Coated.

The back surface peripheral portion 2f of the first photographing lens opening 2a is formed in a curved surface similar to the curved surface of the first surface of the first photographing lens L1, and the back surface peripheral portion 2f is the first photographing lens L1. A very narrow gap is provided near the first surface of the lens L1. Accordingly, the oblique light beam outside the angle of view of the photographing is incident on the back side of the first photographing lens opening 2a and is reflected at the end of the first photographing lens L1 and other places.
It is possible to prevent unexpected reflected light from reaching the film surface and causing flare.

Further, it is less likely that dust enters the interior from the gap and affects the internal photographing mechanism.

Next, in FIG. 4, the second unit body is not shown because it is similarly covered from the front and rear by the front cover 11 and the rear cover 12, but the second unit body has a wider inside than the first photographing lens L1. 2. Various photographing mechanisms including the photographing lens L2 are mounted, and an unexposed 135 film is loaded. When the film is exposed by photographing, the long side is 36 m by the photographing frame provided in the second unit body.
A panorama-size shooting screen of m and short side 13 mm is formed.

The photographing mechanism mounted on the second unit body is substantially the same as the photographing mechanism mounted on the first unit body, and the front cover 11 and the rear cover 12 are also used for the film unit 1 with the first lens. Common with cover. Therefore, description of various exterior parts is omitted.

Reference numeral 4 denotes a second exterior member, which can receive a light ray having an angle of view slightly larger than the angle of view of the second photographing lens L2.
In addition, a second photographing lens opening 4a corresponding to an angle of view of a panoramic size is provided. Above the second photographing lens opening 4a, the view is set to about 80% of the photographing screen to define the field of view of the finder. It has a 2 finder opening 4b.

Then, by inserting the two locking claws 4c provided on the back surface into the locking holes 11c of the front cover 11 and locking them, the second exterior member 4 is mounted on the front cover 11 as shown in FIG. Thus, the second film unit with lens 3 capable of shooting on a panoramic size screen is completed.

The second exterior member 4 differs from the first exterior member 2 not only in the shape of the second photographing lens opening 4a and the second finder opening 4b, but also in the shape of the first exterior member. Similarly to the second wall 2d, the shape of the wall 4d serving as a barrier for preventing the fingertip from entering the shooting angle of view of the shooting lens L is different. As a result, the second film unit with lens 3 shown in FIG. 5 has a considerably different impression from the first film unit with lens 1 shown in FIG. 2, and both can be easily identified.

In particular, when an ultra-wide-angle lens having a focal length of 20 mm or less and a very wide angle of view is used, the fingertips can easily enter the angle of view, but the wall 4d becomes a barrier, and Problems can be prevented in advance.

Next, the shape of the rear portion of the second exterior member 4 will be described with reference to FIG. The second photographing lens L2 is an ultra-wide-angle lens having a focal length of 20 mm or less, and the first lens L2
It is composed of two lenses, a first lens and a second lens L22, and is held by a lens base plate 51 mounted on the second unit body. Similarly, about two locking claws 51a are provided on the lens base plate 51, and the end L2 of the first lens L21 is provided.
The first photographing lens L1 is retained so as not to fall off during the manufacturing process by being locked to 1a, but the strength is not sufficient. Therefore, a projection 4e is provided at the rear of the second exterior member 4 to escape the locking claw 51a, and the projection 4e is connected to the end L2 of the first lens L21.
The second photographing lens L2 is held in the optical axis direction by contacting the second photographing lens L2. As a result, even when vibration or impact is applied to the second lens-equipped film unit 3, the second photographic lens L2 is reliably held while maintaining its performance.

Since the second photographing lens L2 has a shorter focal length than the first photographing lens L1, the first lens L21 is located further rearward. Thus, the protrusion 4e of the second exterior member 4 is formed longer than the protrusion 2e of the first exterior member 2. However, as described above, the first exterior member 2 and the second exterior member 4 are different members having variously different shapes even if they are functionally the same, so that no problem occurs. If the photographing lenses having different focal lengths are held in the optical axis direction by the front cover, the difference in the length of the protruding portions makes them non-common and increases the mold cost. Since the cover 11 is common to both, an increase in die cost can be suppressed.

Further, similarly to the first exterior member 2, the back surface peripheral portion 4f of the second photographing lens opening 4a is formed into a curved surface similar to the curved surface of the first surface of the second photographing lens L2. The portion 4f is made very close to the first surface of the second photographing lens L2 so as to form a very narrow gap. Therefore, it is possible to prevent oblique rays outside the photographic field angle from being incident to cause flare, and to reduce the possibility of dust entering the inside and affecting the photographic mechanism inside.

The wall 2d of the first exterior member 2 and the second
The shape of the wall portion 4d of the exterior member 4 may be any shape as long as it can mainly prevent the fingertip of the right hand from entering the angle of view of the photographic lens. 2. It is not necessary to surround the entire periphery of the aperture 4a for the taking lens.

In the above embodiment, the first
Although the taking lens L1 and the second taking lens L2 are two pieces, one or both may be a single piece.

Further, in the above embodiment, the assembly sequence is such that the front cover is mounted on the unit main body, and then the exterior member is mounted. However, the assembly sequence is not limited to this. Attach the exterior member to the front cover,
The front cover may be attached to the unit body.

Also, according to the above embodiment, 135
Manufactures two types of lens-equipped film units with a common front cover: a film unit with a lens that can be loaded with film and photographed in standard size, and a film unit with lens that has a wider-angle photographing lens and can shoot in panoramic size. However, the present invention is not limited to this. For example, two types of lens-equipped film units having different focal lengths of the photographing lenses may be manufactured with a common front cover while keeping the standard size screen.

Alternatively, two or three types of lens-fitted film units for high definition, classic, and panoramic sizes may be manufactured by loading an IX240 film. IX
When using 240 film, the shooting frame of the unit body remains in high definition size at any size,
In the case of another size, a magnetic signal or an optical signal is input to the film, and this signal is detected at the time of printing, and printing is performed to a predetermined size.

Further, the opening for the photographing lens in the exterior member does not necessarily have to be a vertically narrow opening according to the panorama size or the like. However, providing a narrow opening in accordance with the shooting angle of view prevents unnecessary light from entering and reduces the occurrence of flare, and is therefore a more preferable exterior member.

Furthermore, in the film unit with both lenses of the present invention, it is necessary to make the front cover common, but the other small members do not necessarily have to be common.

Although the first unit main body and the second unit main body have been described as non-common, a separate member is attached to a standard size photographing screen to form a panoramic size image frame, and a lens is formed. Although the main plates 31 and 51 are not common,
It is possible to make the first unit main body and the second unit main body common.

Further, in the above embodiment, two types of lens-equipped film units corresponding to two types of photographing lenses having different focal lengths have been manufactured. Any type of taking lens may be used.

In addition, three or more types of photographing lenses
More than one type of film unit with a lens may be manufactured.

[0040]

According to the film unit with a lens of the present invention, when a plurality of types of film units with a lens are manufactured using photographing lenses having different focal lengths and the like, respectively.
The use of a common front cover saves expensive mold costs, and also allows the photographic lens to be held in the optical axis direction without using the front cover. Becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view before a first exterior member is mounted on a first unit main body.

FIG. 2 is a perspective view in which a first exterior member is mounted on a first unit main body.

FIG. 3 is a partially enlarged cross-sectional view in which a first exterior member is mounted on a first unit main body.

FIG. 4 is a perspective view showing a state before attaching a second exterior member to the second unit main body.

FIG. 5 is a perspective view in which a second exterior member is mounted on a second unit main body.

FIG. 6 is a partially enlarged cross-sectional view in which a second exterior member is mounted on a second unit main body.

[Explanation of symbols]

 L1 First photographic lens L11, L21 First lens L11a, L21a End L2 Second photographic lens 1 Film unit with first lens 2 First exterior member 2a First photographic lens opening 2b First finder opening 2e, 4e Projection 3 Film unit with second lens 4 Second exterior member 4a Opening for second photographic lens 4b Opening for second finder 11 Front cover

Claims (7)

[Claims] 1. A first lens having at least a first taking lens
A first photographing lens opening that can be attached to the unit body from the front with respect to the first unit body and the second unit body having at least the second photographing lens, and that corresponds to the angle of view of the first photographing lens. A first exterior member having a projection that comes into contact with the first photographic lens in the optical axis direction around the back surface side of the first photographic lens opening, and an angle of view of the second photographic lens A second exterior member having a second photographic lens opening corresponding to the second photographic lens, and having a projection abutting on the second photographic lens in the optical axis direction around a rear surface side of the second photographic lens opening. A film unit with a lens, characterized by comprising a front cover to which can be attached and the first exterior member. 2. The first exterior member has a first finder opening corresponding to an angle of view of the first photographic lens, and the second exterior member has a first finder opening corresponding to an angle of view of the second photographic lens. The film unit with a lens according to claim 1, further comprising a two finder opening. 3. A wall provided on at least one of the first exterior member and the second exterior member for preventing a fingertip of a right hand from entering at least within an angle of view of a photographing lens. The film unit with a lens according to claim 1 or 2. 4. The film unit with a lens according to claim 1, wherein a focal length of the first photographing lens or the second photographing lens is 20 mm or less. 5. A curved surface similar to a curved surface of a first surface of a photographic lens is provided on a back surface of at least one of the first exterior member and the second exterior member, and a first surface of the photographic lens is provided.
The lens-equipped film unit according to any one of claims 1 to 4, wherein the lens-fitted film unit is close to a curved surface. 6. A first lens having at least a first taking lens
A first photographing lens opening that can be mounted from the front with respect to a unit body and a second unit body that has at least a second photographing lens and that corresponds to an angle of view of the first photographing lens; A first exterior member provided with a projection in contact with the imaging lens in the optical axis direction on the back surface side of the first imaging lens opening, and a second imaging lens corresponding to an angle of view of the second imaging lens A front cover having a projection for contacting the second photographing lens in the optical axis direction on the back surface side of the second photographing lens opening, to which a second exterior member can be attached; Mounting the first unit body from the front, mounting the first exterior member to the front cover, and attaching the protrusion provided around the back surface side of the first photographing lens opening to the first photographing lens. Contacting the optical axis in the direction of the optical axis. Method of manufacturing a lens-fitted film unit according to claim Rukoto. 7. A first lens having at least a first photographing lens
A first photographing lens opening that can be mounted from the front with respect to a unit body and a second unit body that has at least a second photographing lens and that corresponds to an angle of view of the first photographing lens; A first exterior member provided with a projection in contact with the imaging lens in the optical axis direction on the back surface side of the first imaging lens opening, and a second imaging lens corresponding to an angle of view of the second imaging lens A front cover having an opening for the second exterior member having a projection in contact with the second photographic lens in the optical axis direction on the rear surface side of the second photographic lens opening. Mounting the first exterior member; and mounting the first exterior member from the front with respect to the first unit body.
With the front cover with the exterior member attached, the first cover
Contacting a projection provided around the back surface side of the opening for the taking lens with the first taking lens in the optical axis direction.