JPS61118735A - Still photographic camera - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a still photographic camera, in particular for 35111L film, having a retractable photographic lens and a lid fixed to the casing.

PRIOR ART In the case of cameras of the type mentioned above, the collapsibility of the taking lens allows a particularly compact construction, and when the camera is not in use it is possible to achieve a flat profile of the camera casing by means of a lid that is fixed to the casing. What can be done is publicly known. This flat and compact structure has made this type of camera very popular in the market.

However, a drawback of this type of camera is that it cannot be fitted with an interchangeable lens.

The reason for this is that the collapsible lens is held within the camera by a lens slider, which is movable back and forth in the direction of the optical axis within the camera casing and is generally transmission-coupled to the camera lid in a known manner. be. A relatively weak slider guide does not allow the use of large photographic lenses simply because of its weight. It is also of interest only to use long focal length and therefore large and heavy telephoto lenses, since the standard lenses in this type of camera usually have quite short focal lengths by nature, and therefore special This is because a wide-angle lens is not required.

Therefore, an exchange bayonet with a large diameter is attached to the camera casing concentrically with respect to the optical axis, and a telephoto lens can be attached to the large exchange bayonet with the standard lens removed. has already been proposed (West German patent application no. 3402769.6
No. Specification).

However, it has been found that the front casing wall is generally too weak, ie not stable enough, to support relatively heavy telephoto lenses without distortion.

Problems to be Solved by the Invention Therefore, an object of the present invention is to overcome the above-mentioned disadvantages, and to enable a camera of the above-mentioned type to be equipped with a standard lens or a telephoto lens selectively, and to provide a stable and casing for the telephoto lens. The aim was to construct the structure so that it could be held without causing any distortion.

Means for Solving the Problems According to the present invention, a standard lens held on a mount movable from a non-use position to a use position within a vertical guide mechanism in the optical axis direction, and a lid fixed to a casing. 35, of the type in which the cover covers the standard lens in the retracted state and is interlocked with the mount so that when opened, the mount and the lens are moved from the non-use position to the use position.
In a still photography camera for Wx film, a standard lens 4 is exchangeably held in a mount 5 (5a), and a stopper surface that is flat against the camera casing 1 is provided externally concentrically with respect to the optical axis. 1a is attached, standard lens 4 is attached to the stripper surface.
This problem was solved by crimp-bonding the telephoto lens 9, which can be attached to the bayonet 5a with the lens removed.

According to the above-mentioned characteristics, the idea of the invention is to configure a standard lens in a known manner as an interchangeable lens held in a mount which can be moved in the direction of the optical axis from a non-use position to a use position and vice versa in a longitudinal guide mechanism. It's about doing. That is, the known collapsible lens barrel is divided into a mount that remains within the camera casing and an actual detachable lens barrel.

Furthermore, a flat stopper surface is provided on the outside of the camera casing, to which a telephoto lens attachable to the mount is pressed. Unlike previously proposed holding formats which consist of mounting the lens in a bayonet mounted only on the camera casing wall, in the present invention the telephoto lens is mounted in the same bayonet as the standard lens, but in that case the lens side The diameter and spacing of the stopper surfaces on the mount are designed so that when bayonet-fixed, the lens is pressed against the stopper surface on the camera casing side, and the mount and casing wall match to form a tight and firm holding mechanism. Suggest something.

Therefore, the problem solving means of the present invention is to hold a relatively light standard lens as a collapsible lens, expand the photographic possibilities of the camera with a telephoto lens, and also fit this telephoto lens into the bayonet of the standard lens, However, due to its large weight, a camera casing must be used to hold it.

In particular, it is proposed for this purpose that the camera be equipped with a focal plane shutter, preferably a slit shutter. However, this is not a necessary requirement. Each lens may have its own shutter.

Example The invention will now be described in detail with reference to the illustrated embodiments.

In FIGS. 1 and 2, a camera casing is indicated at 1. The casing has an opening on the front side, which opening is covered by a lid 2 which is pivotably mounted on the casing at a pivot point 3.

Inside the casing a standard lens 4 is shown, which is configured as an interchangeable lens and is held in a mount 5 . The mount 5 is movable in the optical axis direction from a non-use position (retracted state, FIG. 1) to a use position (FIG. 2). The withdrawal or retraction of the mount 5 and the lens 4 takes place in a known manner simultaneously with the opening and closing of the lid 2, which for this purpose is connected to the mount 5 via transmission elements 6, 7.8.

FIG. 3 is a sectional view taken along line mm in FIG. 2. Again, the drawn-out emblem lens 4 is shown held within the exchange bayonet Sa within the mount 5.

FIG. 4 is a view seen from the same direction as FIG. 6. Of course, in this case, the standard lens 4 is removed and the telephoto lens 9 is fitted in its place. This telephoto lens 9 is fitted into the same interchangeable bayonet 5a as the standard lens.

However, it has a large diameter stopper surface 9a which is pressed from the front onto a flat surface 1a fixed to the camera cage/goo.

According to this, when rotating and fixing the lens, mount 5
is brought into close contact with the casing surface 1a, so that together they form a stable holding mechanism for the relatively heavy telephoto lens 9.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a camera with a retractable lens and a lid fixed to the casing with the standard lens retracted; FIG.
A schematic cross-sectional view of the camera shown in the figure, FIG.
A schematic cross-sectional view along line m and FIG. 4 are cross-sectional views corresponding to FIG. 3 with a telephoto lens attached.

Claims (1)

[Claims] It has a standard lens held in a mount that is movable from a non-use position to a use position in the optical axis direction within a vertical guide mechanism, and a lid fixed to the casing, and the lid covers the standard lens in a retracted state and is open. In a still photo camera for 35mm film that is coupled with the mount so that the mount and the lens can be moved together from the non-use position to the use position when is held in a bayonet (5a) in a replaceable manner, and a flat stopper surface (1a) is attached to the camera casing (1) externally and concentrically with respect to the optical axis.
A telephoto lens (9) that can be attached to the bayonet (5a) with the standard lens (4) removed from the stripper surface.
A still photo camera characterized by being crimped.