JPH04216538A - Pseudo focal length camera - Google Patents

Abstract

PURPOSE:To achieve the simplification and reduction in cost of a camera itself by materializing a pseudo focal length camera requiring a special and complex constitution compared with an ordinary camera, for instance, a trimming information writing mechanism, and a finder mechanism showing an image corresponding to the image having a different magnification from the image of a photographing optical system, with a simple structure. CONSTITUTION:This camera has size corresponding to the size of the screens of each magnification capable of setting and a frame which can be switched by a mechanical action, as a means displaying a screen magnification on a finder when the pseudo focal length photographing is carried out. Further, a permanent magnet 5 moved between prescribed positions by interlocking to the switching action of the frame is provided. The permanent magnet 5 leaves magnetic recording at a position where the magnet 5 comes into contact with the magnetic track of the film, and does not leave the magnetic recording at the other position, so that the trimming information of the different magnification is distinguished by the presence of the magnetic recording.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pseudo-focal length camera that magnetically records trimming information on a film according to the angle of view selected and set at the time of photographing.

0002

BACKGROUND OF THE INVENTION Recently, so-called compact cameras have been commercially available which are equipped with a zoom function so that telephoto shooting or wide-angle shooting can be performed by moving the position of the photographing lens.

However, since such a camera requires a mechanism for moving the photographic lens, it tends to be more expensive than a compact camera with a normal single focus lens, which undermines the advantage of a compact camera's low price. There is a tendency to put it away.

[0004] From the above-mentioned viewpoint, a pseudo-focal length camera has been proposed that uses a single focal length lens to keep the price of the camera low while producing a pseudo-effect similar to telephoto shooting or wide-angle shooting. Pseudo-focal length cameras have a structure in which cropping information is magnetically recorded on the film at the time of shooting, so that the photo can be cropped and printed to the same angle of view as if the photo had been taken at a focal length equivalent to telephoto or wide-angle. It is provided. Specifically, a magnetic head is required for magnetic recording, and a magnetic track is formed on the photographic film on which the magnetic head contacts and writes trimming information.

By the way, this pseudo-focal length camera is intended to provide a low-priced compact camera equipped with a single focal length lens with the same functionality as a multifocal lens, so it uses a mechanism as simple as possible. It is preferable to configure. The present invention was devised in view of such technical problems in pseudo focal length cameras and to effectively solve them. Therefore, an object of the present invention is to provide a pseudo-focal-length camera equipped with a trimming information writing mechanism and a finder mechanism that have a simpler configuration than any pseudo-focal-length camera proposed so far.

[0006]

[Means for Solving the Problems] A pseudo focal length camera according to the present invention solves the problems of the prior art as described above, and has the following configuration to achieve the object. That is, the pseudo focal length camera of the present invention includes a plurality of frames that individually partition photographing ranges corresponding to various set pseudo focal lengths, and moves between predetermined positions in conjunction with the switching operation of these frames. It is equipped with a permanent magnet.

[0007]

[Operations and Effects of the Invention] In the pseudo-focal-length camera according to the present invention, each frame body serves as a finder mechanism, dividing and showing photographing ranges corresponding to various set pseudo-focal lengths to the photographer. Trimming information is recorded by a permanent magnet on a magnetic track on the film depending on the presence or absence of magnetic information, and the permanent magnet is moved in conjunction with the switching operation of the frame body. When a permanent magnet is in a given position, the presence or absence of a magnetic track at that position governs the presence or absence of magnetic information. Alternatively, if the magnetic tracks at each predetermined position are different, trimming information can be determined depending on which magnetic track has magnetic information.

[0008] In this way, an inexpensive permanent magnet is used to record magnetic information without using an expensive magnetic head, and the content of the trimming information is made in an extremely simplified form based on the presence or absence of magnetic recording. Therefore, the trimming information recording mechanism for performing pseudo focal length photography is simplified, and as described above, the finder mechanism is also simplified, making it possible to reduce the cost of the entire camera.

[0009]

Embodiment A camera according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 7. The camera of this embodiment does not have a finder optical system including a lens, but has three finder frames 1, 2, and 3 that show the photographer the angle of view corresponding to various pseudo focal lengths. 2,3
As shown in the figure, it is provided so that it can be pushed into and pulled out from the camera body 4. The camera of this embodiment has 1.
Pseudo focal length photography corresponding to 4x and 2x magnification is possible. Figure 1 shows the three viewfinder frames 1, 2, and 3 all pushed in and no photography is performed, and Figure 2 shows the two viewfinder frames 1, 2, and 3. Finder frames 1 and 3 are pulled out and 1.4
FIG. 3 shows a state in which the three finder frames 1, 2, and 3 are all pulled out and the photographing equivalent to twice the size can be taken.

[0010] When photographing equivalent to 1.4 times is performed,
The larger finder frame 1 on the objective side (hereinafter referred to as 1.
(hereinafter referred to as the 4x frame) and the finder frame 3 on the eyepiece side (hereinafter referred to as the eyepiece frame) are pulled up,
The width of the field of view that the photographer obtains from the prescribed position P shown in FIG. 2 through both finder frames 1 and 3 is 1.
This is approximately equal to the size of the screen within the trimming frame based on trimming information recorded on the film during shooting at a magnification of 4 times.

[0011] When photographing equivalent to twice as much is performed, 1.
In addition to the 4x frame 1 and the eyepiece frame 3, the smaller finder frame 2 on the objective side (hereinafter referred to as the 2x frame) is also pulled up, and the photographer can move these three frames from the prescribed position P shown in FIG. two finder frames 1 and 2
, 3 is approximately equal to the size of the screen within the trimming frame based on the trimming information recorded on the film during twice the shooting. In this case, 1.
4x frame 1 does not contribute at all to showing the screen size, but in order to raise 2x frame 2, 1
．． The 4x frame 1 must be pulled up first. However, since the 2x frame 2 defines a narrower field of view than the 1.4x frame 1, the presence of the 1.4x frame 1 is not an obstacle at all, as is clear from FIG.

On the other hand, the trimming information corresponding to each magnification as described above is formed on the surface of the film (not shown) by the permanent magnet 5 provided in the camera body 4, as shown in FIG. The information is recorded on any of the magnetic tracks 6, 7, and 8 as magnetic information. Although three magnetic tracks are shown in the figure, two are used in this embodiment.
There are only two tracks corresponding to different magnifications. Therefore, for example, the camera may be an embodiment in which three types of magnification can be set.

By recording the magnetic information on a specific magnetic track, the permanent magnet 5 can record trimming information representing the size of the screen corresponding to the pseudo focal length of the set magnification. In other words, by knowing in which track magnetic information is recorded, it is possible to know the magnification set at the time of photographing, and at the time of printing, the image within the area corresponding to that magnification is trimmed.

The permanent magnet 5 is configured to move between the magnetic tracks 6 and 8 in conjunction with push-in and pull-out operations on the objective-side finder frames 1 and 2, whose usage status is changed depending on the set magnification. The specific configuration will be explained below.

The permanent magnet 5 is held by a write switching member 9 that is movable up and down along the surface of the film being loaded. This writing switching member 9 is connected to one end of a swingable switching lever 10. As shown in FIGS. 1 and 2, the other end of the switching lever 10 is pushed down when not photographing and when photographing at a magnification of 1.4, lifting up the write switching member 9 and the permanent magnet 5. In this state, the permanent magnet 5 is in a position where it contacts, for example, the topmost magnetic track 6. Therefore, in the photographed film frame, the magnetic information is transferred to the topmost magnetic track 6.
, it can be recognized that the film frame was photographed at a rate equivalent to 1.4 times.

It is the pressing lever section 11 formed integrally with the doubling frame 2 that pushes down the end of the switching lever 10 mentioned above. That is, when the doubling frame 2 is pushed in, the push lever section 11 pushes down the end of the switching lever 10, and when the doubling frame 2 is pulled up, the push lever section 11 pushes down the switching lever 10. It will be canceled. The frame 2 for double magnification is raised only when photographing equivalent to double magnification is to be performed. The switching lever 10 is biased by a spring 13 mounted around its swing shaft 12 in a direction in which the left end in FIGS. 1, 2, and 3 is pushed upward. Therefore, when the aforementioned push-down on the end is released, the switching lever 10 rotates clockwise in the figure from the state shown in FIG. 2 to the state shown in FIG. 3, and pulls down the write switching member 9 and the permanent magnet 5. . In this state, the permanent magnet 5 is in a position where it contacts, for example, the bottom magnetic track 8. Therefore, in a photographed film frame, if the magnetic information is recorded in the bottom magnetic track 8, it can be recognized that twice as many images have been taken for that film frame.

Both the 1.4x frame 1 and the 2x frame 2 are fixed to a shaft 14 shown in FIG. 7, and the shaft 14 is rotatably supported by bearings 15 at both ends. There is. Each finder frame 1, 2
The ends fixed to the shaft 14 are provided with notches 16, 17, 1 so as to give the operator a click feeling when the respective frames 1, 2 are pushed in and pulled out.
8 and 19 are formed and cooperate with a spring 20 fixed to the camera body 4 side.

Other main components of the camera of this embodiment will be explained below in comparison with reference numerals. 21 is a release button, 22 is an operating member for winding up the film, and 23 is a spool. A film rewind lever 24 is housed in the bottom of the camera body 4 so that it can be pulled out. 25 is a rewinding fork. 26
is a gear system that communicates between the rewinding lever 24 and the rewinding fork 25. 27 is a gear system that switches between winding operation and rewinding operation. 28 is a shutter, 29 is a shutter driving member, 30 is an exposure aperture, and 31 is a photographing lens. 32 is a film cartridge.

In the camera of this embodiment, since only 1.4x equivalent shooting and 2x equivalent shooting are performed, the part of the film frame that becomes the trimming area for 1.4x equivalent shooting is deleted. It can be formed by Therefore, the image frame is 25
．． A size of 7 mm x 14.1 mm is sufficient and is also advantageous for downsizing the camera body 4.

In the above embodiment, the trimming information is distinguished by using two magnetic tracks, but it is possible to distinguish between the two types of trimming information even if there is only one magnetic track formed on the film. The distinction may be made based on whether or not magnetic recording is performed on the magnetic track. It is also possible to move the permanent magnet so that it is possible to distinguish between magnetic recording in the first half and second half of one magnetic track in one film frame, for example. . Furthermore, one magnetic track may be divided into three parts to distinguish three types of trimming information.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a schematic configuration of a camera according to an embodiment of the present invention.

2 is a diagram showing a state in which pseudo focal length photography equivalent to 1.4 times is performed in the embodiment of FIG. 1. FIG.

3 is a diagram showing a state in which pseudo focal length photography equivalent to twice the focal length is performed in the embodiment of FIG. 1. FIG.

4 is a front view showing a state in which pseudo focal length photography equivalent to twice the focal length is performed in the embodiment of FIG. 1; FIG.

5 is a diagram illustrating a state in which photographing is not performed in the embodiment of FIG. 1, with the top visible; FIG.

FIG. 6 is a diagram showing a state in which the upper end of the camera is cut off in the embodiment of FIG. 1, with the top visible.

7 is a cutaway view showing the main part of FIG. 5. FIG.

[Explanation of symbols]

1 Objective-side finder frame for photography equivalent to 1.4 times as a frame body 2 Objective-side finder frame for photography equivalent to 2 times as a frame body 5 Permanent magnet

Claims (1)

[Claims] Claim 1: A plurality of frame bodies (1, 2
) and a permanent magnet (5) that moves between predetermined positions in conjunction with the switching operation of the frame bodies (1, 2).