JP2001159773A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera constituted in such a manner that a fixed visual field frame and a moving visual field frame are positioned with high accuracy to each other when the moving visual field frame is slidingly moved near to the fixed visual field frame. SOLUTION: This camera has the fixed visual field frame which has a first aperture forming the visual field of a finder and the moving visual field frame which has a second aperture shorter in at least either of the long side or short side than the first aperture and slides in order to insert and remove the second aperture relative to the first aperture. When a visual field different from the visual field of the first aperture is formed by sliding the moving visual field frame and inserting the second aperture to the position facing the first aperture, a second guide part disposed on the front end side of the moving visual field frame in the insertion direction is fitted to a first guide part disposed on the deep side of the fixed visual field frame in the same direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera which forms a different field of view by inserting a moving field frame at a position facing a fixed field frame forming a field of view of a finder.

[0002]

2. Description of the Related Art A camera in which a panorama-size field of view is formed by sliding a moving field frame to a position facing a fixed field frame that forms a standard-size field of view has been conventionally known. In this case, both ends on the long side of the standard size are shielded by the moving visual field frame, and the short side is shortened.
A horizontally long panoramic size field of view is formed.

[0003]

In the above configuration,
A guide member that holds and guides the fixed field frame and the moving field frame is provided in the housing of the finder. Here, in order for the guide member to slide inside the housing, some backlash is required, and the guide member cantileverly holds the moving field frame. Accordingly, when the moving field frame is slid to a position facing the fixed field frame, the moving field frame is displaced from the fixed field frame depending on the posture of the camera (horizontal position shooting or vertical position shooting).

[0004] As a result, the long side of the panorama size is inclined with respect to the short side, or inclined with respect to the AF field frame formed on the prism arranged at a position facing the fixed field frame, which is unsightly. Not only that, sometimes the field of view of the finder is affected.

The present invention has been made in view of such a problem, and proposes a camera having a structure in which positioning is performed with high precision when a moving field frame is slid near a fixed field frame. It is the purpose.

[0006]

The above object is achieved by the following means.

A fixed field frame having a first opening for forming a field of view of a finder; and a second opening having at least one of a longer side or a shorter side shorter than the first opening.
A moving field frame that slides in and out of the second opening with respect to the first opening, and the second opening is positioned at a position facing the first opening by sliding the moving field frame. When a part is inserted and a field of view different from the first opening is formed,
A camera, wherein a second guide provided on a tip side of the moving visual field frame in the same direction is fitted to a first guide provided on a rear side of the fixed visual field frame in an insertion direction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a camera according to the present invention will be described below with reference to FIGS. 1 is a top view of the real image type zoom finder unit, FIG. 2 is an exploded perspective view of the real image type zoom finder unit, FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIG. FIG. 5 is a diagram of a frame and a moving field frame, FIG. 5 is a modification of FIG. 4, and FIG. 6 is a modification of FIG. In FIG. 1, the optical members are drawn in a cross-sectional shape for clarity.

1 and 2, an optical system includes an objective lens system 15 including a first lens 11, a second lens 12, a third lens 13, and a fourth lens 14, and a prism 1
6, a reflecting mirror 17, a transparent plane-parallel plate 18, and an eyepiece 19.

In the objective lens system 15, the first lens 1
The first and fourth lenses 14 are fixed lenses and are fixed to the housing 21, while the second lens 12 and the third lens 13 are movable lenses and move in the optical axis direction along the guide shafts 22 and 23. I do. Although not shown, the second lens 12 and the third lens 13 move in conjunction with zooming of the photographing lens, which is a zoom lens, and the focal length of the objective lens system 15 changes, and the finder zooms. become.

The subject light enters the objective lens system 15, and the subject light emitted from the objective lens system 15 enters the prism 16, is reflected twice, and then exits. It is in the in-focus position, and the subject light forms an image. The formed image is reflected by the reflecting mirror 17 and magnified by the eyepiece lens 19 for observation. The reflecting mirror 17 has a V-shaped longitudinal section.

The image formed by the objective lens system 15 is inverted up, down, left, and right, but is vertically
Reflected by the prism 16 twice in the left-right direction.
Since the light is reflected once at 7, the image can be visually recognized by the eyepiece lens 19 as an erect image in the up, down, left, and right directions.

A fixed field frame 24 corresponding to a standard-sized field of view is mounted on the exit surface of the prism 16.
The moving field frame 25 is configured to be slidable from the lateral direction with respect to the frame 4. As shown in FIG. 3, the holding member 26 is fixed to the housing 21 by small screws 27, and the holding member 26 is provided with a guide shaft 28 horizontally. The holding member 29 holding the moving visual field frame 25 fits on the guide shaft 28 and slides.

Numeral 31 denotes a driving member for driving the holding member 29. The support shaft 31a has the holding member 2 with the prism 16 interposed therebetween.
9 and is fitted in a hole provided in the housing 21. A first connecting member 32 is provided below the support shaft 31 a of the driving member 31, and the driving member 31 and the first connecting member 32 are integrally connected by a small screw 33. Therefore, the driving member 31 and the first connecting member 32 can rotate stably.

Further, the panorama switching operation member 34 is fitted to the rear cover 35, and the second connecting member 36 is integrally connected to the panorama switching operation member 34 by the stopper pin 37. The distal end of the second connecting member 36 is bifurcated,
It is engaged with a protruding portion 32 b protruding from the connecting member 32.

Therefore, when the panorama switching operation member 34 is rotated counterclockwise as viewed from the back of the camera, the second connection member 36 rotates and the first connection member 32 also rotates counterclockwise. When the first connecting member 32 rotates counterclockwise, the driving member 31 also rotates counterclockwise.

A driving pin 31c is provided at the tip of a long arm 31b of the driving member 31 which crosses the upper part of the prism 16, and is engaged with the notch 29a of the holding member 29. Therefore, if the driving member 31 rotates counterclockwise,
The moving field frame 25 slides together with the holding member 29 by the drive pin 31c, and the upper and lower ends of the fixed field frame 24 are shielded to switch to a horizontally long panoramic size field frame.

This will be described in more detail with reference to FIGS.
In (A), the moving field frame 25 is retracted from the fixed field frame 24, and the view of the finder has a standard size of 2 to 3 by the first opening 24 a of the fixed field frame 24. On the other hand, the panorama switching operation member 34 is operated as described above, and the second opening 25a having the right side opened by sliding the moving field frame 25 is inserted into a position facing the first opening 24a. Thereby, as shown in FIG. 4B, the upper and lower ends of the first opening 24a are shielded by the upper and lower arms 25b of the second opening 25a, and the field of view of the finder is switched to a horizontally long panoramic size.

When the movable visual field frame 25 is inserted into the fixed visual field frame 24 in this manner, the guide portion 24b provided to bend at the back of the fixed visual field frame 24 in the insertion direction has the second The open side end of the opening 25a is fitted. The panorama-size field of view is such that the long side is the moving field of view frame 25
And the short side is defined by the first opening 24a of the fixed field frame 24. In this way, the moving field frame 25 is positioned with respect to the fixed field frame 24 by the guide portion 24b. As a result, the inclination between the long side and the short side becomes very small, and the visual field does not become unsightly.

When the panorama switching operation member 34 is rotated in the reverse direction, the driving member 31 rotates clockwise, and the movable field frame 25 is retracted from the fixed field frame 24, so that the field field frame is switched to the standard size field frame. .

In FIG. 3, a thin plate 41 is provided to prevent the arm 31b from coming into contact with the prism 16, and a roof plate 42 is mounted on the upper part of the housing 21 to prevent dust from entering the inside. Preventing.

In the above description, the inner edge of the open side of the second opening 25a is fitted to the outer edge of the guide portion 24b. However, the reverse configuration is possible. That is, as shown in FIG. 5, two guides 64 b are provided at the back of the fixed visual field frame 64 in the insertion direction, and two guides 65 b are also provided at the tip of the moving visual field frame 65. Then, the moving visual field frame 65 is inserted into the fixed visual field frame 64, and the second opening 65
5A is switched to the panoramic view of FIG. 5B from the standard view of FIG. 5A with the first opening 64a facing the first opening 64a, the outer edge of the guide 65b is attached to the inner edge of the guide 64b. Fit. Thereby, the same effect as described above can be obtained.

In the second opening, the right side may be connected without opening the right side.

Further, the above-described embodiment has a configuration in which both long sides of the first opening of the fixed field frame are shielded to form a horizontally long field of view, but the short side of the first opening of the fixed field frame is formed. Can be shielded to form a field of view whose long side is shorter than the field of view of the fixed field frame.

FIG. 6 shows such a configuration.
(A) shows a state in which the moving visual field frame 75 is retracted from the fixed visual field frame 74, and a visual field is formed by the first opening 74 a of the fixed visual field frame 74, so that the visual field is slightly oblong.
Next, as shown in FIG. 6B, the moving field frame 75 is slid, and the second field of the moving field frame 75 is inserted into the first opening 74 a of the fixed field frame 74.
The openings 75a are opposed to each other. Thus, the long side is defined by the first opening 74a, the short side is defined by the second opening 75a, and the long side is shorter than the field formed by the first opening 74a.

At this time, similarly to FIG. 4, the guide portion 74b is provided to be bent at the back of the fixed visual field frame 74 in the insertion direction.
The notch 75b provided in the moving visual field frame 75 is fitted into the notch 75b. Therefore, the inclination between the long side and the short side in FIG. 6B is extremely small, and the visual field does not become unsightly.

A notch 7 is formed at the outer edge of the guide portion 74b.
Instead of fitting the inner edge of 5b, the outer edge of the guide of the moving field frame may be fitted to the inner edge of the guide of the fixed field frame as shown in FIG.

The embodiment shown in FIG. 6 is applicable to a camera loaded with an IX240 film. The field of view formed by the first opening 74a is a high-definition size as shown in FIG. The first opening 74a and the second
The field of view formed by the opening 75a can be of a classic size.

Next, a description will be given of a moving member for displaying images in the viewfinder, instead of the moving field frame for forming the visual field as described above.

In recent years, the camera is held with the left arm extended so that the photographing lens faces the photographer himself, the photographer is projected on the reflector at the top of the camera, the composition is determined, and the release button is pressed. 2. Description of the Related Art There is a camera having a so-called self-portrait mode for photographing itself. When the self-portrait mode is set, the taking lens automatically focuses on a short distance of about 60 cm. However, if you forget to set the self-portrait mode and perform general shooting, the picture will be out of focus. For this reason, if the setting of the self-portrait mode is displayed in the viewfinder, such erroneous operations are drastically reduced.

The embodiment described below is for such a purpose, and will be described with reference to FIG.

In FIG. 7, reference numeral 84 denotes a fixed field frame having a first opening 84a as described above. On the other hand, reference numeral 85 denotes a display plate which slides in the same manner as the above-mentioned moving visual field frame and is inserted into and removed from the fixed visual field frame 84. The display plate 85 is a transparent parallel flat plate made of acrylic or the like, and has a display portion 85a designed for the upper body of a person. When the self-photographing mode is set, when an operation member similar to the panorama switching operation member 34 is operated, the photographing lens automatically focuses on a short distance of about 60 cm, and at the same time, the display plate 85 displays the state shown in FIG. If the user slides from the state to the state shown in FIG. 7B and looks through the finder, the display section 85a which is not displayed in the general photographing is displayed.

Here, the display section 85a is not limited to a human design, and may have any shape.

Further, at least the first
The visible range of the opening 84a is colored red or the like,
A display that makes it difficult to see the normal field of view may be performed by performing a roughening process or the like.

At this time, the guide portion 8 of the fixing member 84
Since the notch 85b of the display plate 85 fits into the 4b, the display portion 85a does not tilt with respect to the first opening 84a to make it difficult to see. The guide portion 84b and the notch 85b
May be changed to the form as shown in FIG.

Each of the fixing members described above does not necessarily have to have an opening for forming a visual field. The fixing member is formed of a transparent parallel flat plate, and the same "B" as the opening is used. May be drawn by printing or the like.

Finally, the correspondence between the terms used in the claims and the terms used in the embodiments will be described.

The moving member in the claims corresponds to the moving field frames 25, 65, 75 and the display plate 85 in the embodiment.

The first guide portion in the claims is the guide portion 24b, 64b, 74b, 84 in the embodiment.
b.

The second guide portion in the claims corresponds to the open end of the second opening 25a, the guide portion 65b, and the notches 75b, 85b in the embodiment.

[0041]

According to the camera described in any one of claims 1 to 7,
When the moving member is slid near the fixed field frame, the positioning is performed with high accuracy.

[Brief description of the drawings]

FIG. 1 is a top view of a real image type zoom finder unit.

FIG. 2 is an exploded perspective view of a real image type zoom finder unit.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a view of a fixed visual field frame and a moving visual field frame viewed from a direction B in FIG. 1;

FIG. 5 is a modification of FIG.

FIG. 6 is a modification of FIG.

FIG. 7 is a view of a fixed field frame and a display panel viewed from a direction B in FIG. 1;

[Explanation of symbols]

 24, 64, 74 Fixed viewing frame 24a, 64a, 74a First opening 24b, 64b, 65b, 74b Guide 25, 65, 75 Moving viewing frame 25a, 65a, 75a Second opening 29 Holding member 31 Driving member 34 Panorama switching operation member 75b Notch

Claims (7)

[Claims] 1. A fixed visual field frame forming a visual field of a finder, and a visual field smaller than the visual field formed by the fixed visual field frame by being inserted near the fixed visual field frame, or within the visual field. A moving member for performing a predetermined display; and when the moving member is inserted in the vicinity of the fixed visual field frame, the first guide portion provided on the back side of the fixed visual field frame in the insertion direction moves the moving member in the same direction. A camera, wherein a second guide provided on a distal end side of a member is fitted. 2. The fixed field frame has a first opening forming a field of view of a finder, and the moving member has a second opening at least one of a longer side and a shorter side shorter than the first opening. The camera according to claim 1, comprising: 3. The camera according to claim 1, wherein the moving member has a display unit for displaying that the self-portrait mode is set. 4. An apparatus according to claim 1, wherein an outer edge of said second guide is fitted to an inner edge of said first guide.
The camera according to claim 1. 5. An apparatus according to claim 1, wherein an inner edge of said second guide is fitted to an outer edge of said first guide.
The camera according to claim 1. 6. The second opening has a shorter shorter side than the first opening and is open in the insertion direction, and an inner edge of the second guide portion is an open shorter side of the second opening. The camera according to claim 5, wherein the camera is an end of the camera. 7. The panorama-size field of view is formed by inserting the second opening at a position facing the first opening. Camera.