JP2001228524A - Photographing device and die for molding front cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographing device constituted to restrain the rise of the cost of a die because it requires only the slight change of the die at the time of molding plural front covers having different shape obtained by changing an aperture part for a photographing lens or an aperture part for a finder, and a die for molding the front cover. SOLUTION: This photographing device is equipped with the front cover with which an internal member is covered from the front and which has the aperture part for the photographing lens corresponding to incident luminous flux on the photographing lens and the aperture part for the finder corresponding to incident luminous flux on the finder. In the device, at least either the die for molding the aperture part for the photographing lens or the die for molding the aperture part for the finder is made a telescopic die, and plural front covers having the shape where at least either the aperture part for the photographing lens or the aperture part for the finder is made different by changing the telescopic die are molded and can be respectively attached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing apparatus having a front cover and a mold for molding the front cover, and is particularly suitable for a film unit with a lens.

[0002]

2. Description of the Related Art In a film unit with a lens, in order to meet various demands of users, for example, when a 135 film is loaded, a photographing frame is changed and a photographing screen is changed to two.
In some cases, two types of lens-equipped film units having different photographing screens may be produced by exposing to a standard size of 4 mm × 36 mm or a panorama size of 13 mm × 36 mm while using other members as common as possible.

It is also possible to mount a standard lens having a focal length of 30 mm and a wide-angle lens having a focal length of 24 mm, and to produce two types of lens-equipped film units having different focal lengths while sharing other members as much as possible. is there.

Further, in a film unit with a lens, an internal member is covered with a front cover from the front.
At the approximate center of the front cover, a photographic lens opening corresponding to the luminous flux incident on the photographic lens is bored. Above the photographic lens opening, a finder opening corresponding to the luminous flux incident on the finder is provided. Are drilled.

[0005]

As described above, when producing a plurality of types of lens-equipped film units by changing the photographing screen or changing the focal length so that other members are made as common as possible, the front cover is required. It is necessary to change the size of the aperture for the taking lens and the aperture for the viewfinder.

That is, when changing the photographing screen, it is necessary to change the size of the finder opening because the finder field of view is defined by the finder opening in the film unit with the lens. Although it is not always necessary to change the aperture for the taking lens, for example, when the size is changed from the standard size to the panoramic size, the light flux in the short side direction becomes narrower. Is desirably shorter.

When the focal length is changed, since the angle of view changes, it is necessary to change the size of the photographic lens opening and the size of the finder opening.

Therefore, when each opening is formed to have the largest size and the front cover is used in common, when a smaller opening is required, a member having a small opening is mounted behind the front cover. I was However, in this case, both the member having the photographing lens opening and the member having the finder opening must be mounted, but there is a risk that a work error occurs such that only one member is mounted. There was sex.

Further, when only the opening for the photographing lens and the opening for the finder are changed, a non-common front cover is sometimes formed.

FIG. 4 is a view showing a mold of the front cover when the front cover is molded with resin. FIG. 4 is a diagram of the front cover and the mold cut in the lateral direction at the center of the opening for the taking lens. The front cover 50 is formed by a fixed mold 51 and a movable mold 52. The photographing lens opening 50a and the finder opening (not shown) are molded by the fixed mold 51.

By separately manufacturing at least the fixed mold as described above, different front covers can be molded. However, since the fixed mold is large and expensive, the cost of the mold is greatly increased and the cost is reduced. This is not preferable for a lens-fitted film unit. The same applies to inexpensive popular type cameras with interchangeable films.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and is intended for molding a plurality of front covers having different shapes in which a photographic lens opening and a finder opening are changed.
An object of the present invention is to provide a photographing apparatus and a mold for molding a front cover, which require only a slight change of the mold and suppress an increase in mold cost.

[0013]

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

A photographing apparatus comprising a front cover which covers an internal member from the front and has a photographing lens opening corresponding to a light beam incident on a photographing lens and a finder opening corresponding to a light beam incident on a finder. At least one of the mold for molding the aperture for the photographic lens or the mold for molding the aperture for the finder is a nested mold, and the nested mold is replaced, and the aperture for the photographic lens or A photographing apparatus, wherein a plurality of front covers having at least one of a different shape from the finder opening are formed and can be mounted.

Front cover molding for covering the internal member from the front and molding a front cover having an opening for a photographing lens corresponding to the light beam incident on the photographing lens and a finder opening corresponding to the light beam incident on the finder. In the mold,
At least one of a mold for molding the opening for the photographing lens or a mold for molding the opening for the finder is a nested mold and the nested mold is replaced,
A front cover molding die, wherein a plurality of front covers each having a different shape from at least one of the photographing lens opening and the finder opening are formed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a photographing apparatus and a front cover molding die according to the present invention will be described with reference to FIGS. The photographing device described below is a film unit with a lens, but is not limited to a film unit with a lens, and may be a camera or a digital camera with exchangeable films.

FIG. 1 is a perspective view of a film unit with a lens before a front cover is attached. Reference numeral 1 denotes a unit body on which various photographing mechanisms including a photographing lens 11 and a finder 12 are mounted. Then, the rear cover 2 is mounted from the rear to cover the rear member.

Reference numeral 3 denotes a front cover, which is attached to the unit body 1 from the front so as to face the rear cover 2 and covers an internal member. The front cover 3 is provided with a photographic lens opening 3a corresponding to a light beam incident on the photographic lens 11, and a finder opening 3b for defining the field of view of the finder 12 above the photographic lens opening 3a. Has been drilled.

It is assumed that a photographic image frame (not shown) of the unit body 1 is formed so as to be exposed on a standard size photographic screen of 24 mm × 36 mm.

Here, a mold for molding the front cover 3 will be described with reference to FIG. FIG. 2 is a diagram of the front cover 3 and the mold cut in the horizontal direction at the center of the photographing lens opening 3a. The front surface of the front cover 3 is molded by a fixed mold 21, and the rear surface is molded by a movable mold 22. The photographing lens opening 3a is molded by a nesting mold 23 inserted into the fixed mold 21, and the finder opening 3b is molded by a similar nesting mold.

Next, the photographing frame of the unit body 1 shown in FIG. 1 is shielded from the end in the short side direction so that a 13 mm × 36 mm panoramic photographing screen, which is longer than the standard size, is exposed. A lens-equipped film unit in which other members are made as common as possible will be produced. FIG. 3 is a perspective view of the film unit with lens before the front cover is attached.

Reference numeral 31 denotes a unit body on which the members common to the members shown in FIG. 1, including the photographing lens 11 and the finder 12, are mounted. As described above, only the photographing image frame is formed for a panoramic size. Reference numeral 33 denotes a front cover, which has an opening 33a for a photographing lens formed to have a short side corresponding to the incident light beam for panorama and a short side in which the viewfinder 12 has a panoramic size field of view. A finder opening 33b is formed.

Therefore, even if other parts of the front cover 33 are shared with the front cover 3, the front cover 33 and the front cover 3 have different shapes. Therefore, when molding the front cover 33, the nesting mold 23 shown in FIG. 2 is removed and a nesting mold for the photographing lens opening 33a is inserted. The same applies to the nesting die for the finder opening 33b.

Although the finder opening 33b in the front cover 33 is changed as shown in FIG. 3, the photographic lens opening may not be changed with the photographic lens opening 3a shown in FIG.

By replacing only the small nesting molds in this way, the large and expensive fixed molds 21 and movable molds 2 can be replaced.
2 can be used in common, and different forms of front cover dies can be manufactured at very low cost.

As described above, 135 films are loaded,
It is possible to inexpensively produce two types of film units with a lens, a standard size and a panoramic size.

However, the present invention is not limited to this.
Two or three types of film units with a lens having a panoramic size may be produced.

Although the above description has been given of the embodiment in which the photographing lens image frame is changed, the present invention is not limited to this. For example, the same applies when the focal length of the photographing lens is changed. When the focal length of the taking lens changes, the angle of view changes, so the size of the opening for the taking lens and the size of the finder changes according to the angle of view. Accordingly, it is possible to manufacture the front cover molds having different shapes at very low cost.

Further, the nesting mold for the photographic lens opening and the nesting mold for the finder opening may be integrally formed. Thus, there is no error in inserting and removing the nesting mold, and the mold for the front cover having different openings can be reliably manufactured.

[0030]

According to the photographing apparatus of the present invention, a plurality of kinds of photographing are provided in which a plurality of front covers each having at least one of a photographing lens opening and a finder opening are mounted in different shapes. The device can be produced inexpensively.

According to the front cover molding die of the present invention, a plurality of front covers having at least one of a photographing lens opening and a finder opening are formed at a low cost. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a film unit with a lens before a front cover is attached.

FIG. 2 is a diagram of a front cover and a mold cut in a horizontal direction at a center of a photographing lens opening.

FIG. 3 is a perspective view of a film unit with a lens before a front cover having a different shape is attached.

FIG. 4 is a diagram of a front cover and a conventional mold cut in a lateral direction at the center of a photographing lens opening.

[Explanation of symbols]

 1, 31 Unit body 3, 33 Front cover 3a, 33a Photographing lens opening 3b, 33b Viewfinder opening 11 Photographing lens 12 Viewfinder 23 Nesting mold

Claims (7)

[Claims] 1. An image pickup apparatus comprising: a front cover that covers an internal member from the front and has a photographing lens opening corresponding to a light beam incident on a photographing lens and a finder opening corresponding to a light beam incident on a finder; In the apparatus, at least one of a mold for molding the photographing lens opening or a mold for molding the viewfinder opening is used as a nesting mold, and the nesting mold is replaced, and the photographic lens opening is replaced. A photographing apparatus characterized in that a plurality of front covers, each of which has a different shape from at least one of the opening and the finder opening, are formed and can be attached to each of the front covers. 2. The photographing apparatus according to claim 1, wherein a nesting mold for molding the photographing lens opening and the finder opening is formed integrally. 3. The photographing apparatus according to claim 1, wherein a photographing screen to be exposed differs according to the front cover attached. 4. The photographing apparatus according to claim 1, wherein the focal length of the photographing lens differs according to the front cover attached. 5. The photographing apparatus according to claim 1, wherein the photographing apparatus is a film unit with a lens. 6. Before molding a front cover which covers an internal member from the front and has a photographing lens opening corresponding to a light beam incident on a photographing lens and a finder opening corresponding to a light beam incident on a finder. In the mold for cover molding,
At least one of a mold for molding the opening for the photographing lens or a mold for molding the opening for the finder is a nested mold and the nested mold is replaced,
A front cover molding die, wherein a plurality of front covers each having a different shape from at least one of the photographing lens opening and the finder opening are formed. 7. The mold for molding a front cover according to claim 6, wherein a nesting mold for molding the photographing lens opening and the finder opening is formed integrally.