JP2000338555A - Finder field frame switching device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a finder field frame switching device for camera small in occupancy space and excellent in visibility in the display part of the field frame even when a subject is in a dark state. SOLUTION: This finder field frame switching device is arranged on the finder optical path, and the device is provided with upper and lower trimming masks 22 and 23 which are driven so as to be inserted/retreated onto/from the full-sized screen of the finder. In a state where the masks are inserted onto the full-sized screen, the finder field frame with upper and lower parts trimmed is obtained so as to be made correspond to the panoramic-sized screen of the photographing frame. A mark 23f of 'PANORAMA' printed on the mask 23 in the trimmed state is illuminated by an LED, and then, the mark 23f is displayed as an in-finder display.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display structure in a viewfinder of a camera viewfinder switching device.

[0002]

2. Description of the Related Art In recent years, cameras capable of pseudo panoramic photography and cameras that apply a new size film and capable of switching the size of a photographed frame have been switched to a high definition size, a conventional size, a panoramic size, a half size, and the like. An index line and a mask have been applied as a display in a finder for displaying a state.

[0003] However, it is difficult to reliably identify which photographic image frame size has been switched using only the above-mentioned index line or mask. Therefore, Japanese Patent Application Laid-Open No.
In the apparatus disclosed in Japanese Patent Publication No. 40, the size of the switching visual field frame is identified in the viewfinder by displaying characters and symbols. As a display method, a method of punching out characters or the like on a finder mask shielding plate, or disposing a transmission type display portion formed by etching, and performing display using subject light which is natural light is adopted.

[0004]

However, the structure disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 63-266440 is disadvantageous in that when a display unit in which characters or the like are punched is applied, the size becomes large in size and the size is reduced. The use of the display part formed by etching is disadvantageous in cost.
Further, in these cases, when the subject is dark, the display in the viewfinder becomes difficult to see. In addition,
Japanese Unexamined Patent Publication No. 63-266440 discloses a technique in which a film on which the above-mentioned photographing information is printed is applied as a display unit. Similarly, when the subject is dark, the display in the viewfinder becomes difficult to see. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a small occupying space, a good visibility of a display section even when a subject is dark, and An object of the present invention is to provide a low-cost camera viewfinder frame switching device.

[0006]

According to a first aspect of the present invention, there is provided a finder field frame switching device for a camera, comprising a field frame which can be inserted and retracted in a finder field, and a printing unit provided on the field frame. A display unit, and display contents of the display unit are displayed in a finder.

According to a second aspect of the present invention, in the finder field frame switching device for a camera, the printing portion of the display unit is made of a fluorescent paint.

According to a third aspect of the present invention, there is provided a finder field frame switching device for a camera according to the first aspect, further comprising an illuminating means for illuminating a display unit on the field frame. I have.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a camera incorporating a finder field frame switching mechanism (device) according to an embodiment of the present invention, and is a schematic configuration diagram when viewed from a side of the camera.

As shown in FIG. 1, this embodiment exemplifies a single-lens reflex camera, for example.
In front of a camera body 1 of the present camera, a photographing lens 2 as a photographing optical system is provided. An incident light beam from the photographing lens 2 is incident along the optical axis O1 and is moved by a movable reflection mirror 3 provided in a mirror box provided at a substantially central portion in the camera body 1. The light is reflected on the upper side of the main body 1, is imaged on the focusing screen 4, is diffused and transmitted, and is transmitted through a finder field switching mechanism 5 disposed above the focusing screen 4.
Then, the direction is changed in the finder image inverting means 6 and the light is guided to the eyepiece 7. As a result, the subject image formed on the focusing screen 4 can be observed.

The movable reflecting mirror 3 is constituted by, for example, a quick return mirror. That is, the movable reflection mirror 3 is attached to a fixed member in the mirror box of the camera body 1 at one end on the upper side thereof.
It is rotatably supported by the shaft 3a, and in the normal state of the camera, that is, when the subject image is observed by the finder, the angle is about 45 ° with respect to the optical axis O1. It is inclined. When the exposure is performed in conjunction with the release operation at the time of photographing, the movable reflection mirror 3 is retracted from the optical axis O1 by rotating the movable reflection mirror 3 upward of the camera. ing.

The finder visual field switching mechanism (device) 5 is used to set the finder screen when the aspect ratio of the finder screen as a finder visual field frame corresponding to a desired photographing screen size is set prior to photographing. A mechanism for selectively switching the vertical or horizontal field of view from the full size state to the trimming state. In the case of the present embodiment, the photographing screen size itself is recorded on the film as print size information as described later.

Further, the finder image reversing means 6 comprises:
For example, a finder image reversing optical system formed by a penta roof prism or a combination of a roof roof mirror and a plane mirror is used. An object image formed on the focusing screen 4 is passed through the eyepiece 7. It is provided so that it can be observed as an erect image when observing the image.

On the other hand, in the vicinity of the finder image reversing means 6, finder display devices 8A and 8B described later (8B is not shown in FIG. 1) are provided.
The display light beams D1 to D4 emitted from the finder display devices 8A and 8B are guided to the eyepiece 7 via the finder image reversing means 6, thereby providing various kinds of photographing information and the like. Is displayed on the outside of the screen frame of the finder screen.

Further, a light source unit LED 72 serving as an illuminating unit for a display unit of the finder visual field switching mechanism 5 is provided above the finder image inverting unit 6 on the eyepiece 7 side.
And a condenser lens 73 are provided. When the shooting screen size is switched to the landscape screen (panorama screen in this embodiment), the viewfinder screen (field of view)
Is switched to the horizontally long size, and at the same time, characters (or symbols) indicating the switching screen size are displayed outside the switched finder screen frame by the illumination light from the illumination means.

A shutter 9 such as a focal plane shutter is provided behind the camera body 1, and a film 10 is provided behind the shutter 9. .

In the film applied in the present invention, for example, a magnetic material or the like capable of magnetic recording is applied (coated) on the back surface side of the film 10 having a roll shape, for example, to form a magnetic recording portion. Various kinds of photographing information and the like are recorded in the magnetic recording unit.

Further, in the camera body 1, a magnetic head 11 as a magnetic recording means is disposed further behind the film 10, and a magnetic material applied to the back side of the film 10 is provided. For example, various types of photographing information such as the aspect ratio of a photographing screen can be magnetically recorded on the magnetic recording unit composed of the above.

Further, in the camera body 1 behind the film 10, an LED 12 which is an optical recording means composed of, for example, a light emitting diode is provided.
By exposing the photographing information such as the aspect ratio of the photographing screen to the outside of the photographing screen frame on the zero plane, optical recording can be performed.

FIG. 2 is a perspective view of a main part showing a finder visual field switching mechanism of the camera. The finder field switching mechanism 5 is disposed above the focusing screen 4 as described above, and FIG. 2 shows an initial state where the finder screen is in a full size state. In FIG. 2, the direction indicated by the arrow F indicates the front of the camera body 1.

As shown in FIG. 2, this finder field switching mechanism 5 has its finder field frame,
A full-size mask 21, which is a screen frame corresponding to the full size of the photographing screen, is provided, and the focusing screen 4 is held under the full-size mask 21 so as to be almost in close contact.

In the vicinity of the full-size mask 21, an upper mask 22 and a lower mask 23, which are a pair of first masks for trimming the finder screen in the vertical direction, are provided. The upper mask 22 and the lower mask 2
By sliding the 3 up and down, a viewfinder field frame of a landscape-size screen (corresponding to a panorama-size screen) having an aspect ratio that is landscape-long with respect to the full-size viewfinder screen is obtained.

The pair of first masks, that is, the upper mask 22 and the lower mask 23 are trimming mask portions 22b and 23, which are mask plates made of a plate-like member.
b, the upright bent portions 22c and 22cc on the upper mask 22 side provided on both end sides thereof, and the upright bent portions 23c and 23cc on the lower mask 23 side. Holes 22a, 22aa provided in 22cc, 23c, 23cc (upper mask 22
Side), and holes 23a, 23aa (lower mask 23).
Side) is rotatably supported by a fixing member (not shown) in the camera body 1. Then, the upper mask 2
2 and the lower mask 23 are provided with the holes 22a, 22a.
The trimming mask portions 22b, 23a are respectively rotated around the rotation centers a, 23a, 23aa.
b is for trimming the vertical direction of the finder screen.

The viewfinder field obtained by trimming the upper and lower sides gives a horizontally long field frame corresponding to a horizontally long (panoramic size) photographing screen as described above, and a display section is provided on the surface of the trimming mask section 23b. Is printed with a character marker 23f of "PANORAMA". The character mark 23f has a character portion printed with fluorescent paint and a ground portion printed in black. In addition, the fluorescent paint of the character portion may be printed with a fluorescent material, and in this case, the LED 72 and the condenser lens 73 which are the above-described illumination means.
Becomes unnecessary.

The upright bent portions 22c and 23c are provided with arms 22d and 23d extending upward, and a tension spring, which is an elastic member, is provided between the arms 22d and 23d. The upper mask 22 and the lower mask 23 are urged to always be in the retracted state.

Operating arms 22e and 23e extend inwardly of the bent portions 22c and 23c, respectively. The operating arms 22e and 23e are provided below the switching arms 26, which are disposed below the operating arms 22e and 23e. When the switching operation is performed, the pressing portion 26c of the switching lever 26 presses the operating arms 22e and 23e, whereby the upper mask 22 and the lower mask 23 rotate.

On the other hand, in the vicinity of the full-size mask 21, a vertically-long screen frame having an aspect ratio that is longer than the full-size finder screen is formed by trimming the horizontal view of the finder screen. A left mask 24 and a right mask 25, which are a pair of second masks, are provided.

The pair of second masks, ie, the left mask 24 and the right mask 25, are provided with trimming mask portions 24b, 2
5b is provided, and shaft portions 24a and 25a are provided at one end in the width direction, respectively. This shaft portion 24a, 2
5a is rotatably supported by a fixing member (not shown) in the camera body 1, and bevel gears 24c, 25c are provided at the front end of the camera body 1 by the bevel gears 24c, 25c. It is provided integrally with the shaft portions 24a and 25a.

The bevel gear 24c is integrally provided with a fork portion 24d so as to extend toward the side of the camera body 1. In the fork portion 24, the d is formed by the shaft portion 24a and the fork portion 24d. It is configured to rotate integrally with the bevel gear 24c.

In front of the upper mask 22,
Connection gear section 3 for connecting the bevel gears 24c and 25c
0 is provided. The connecting gear portion 30 includes a shaft portion 30a rotatably supported by a fixing member (not shown) of the camera body 1 and umbrellas provided integrally at both ends of the shaft portion 30a. The bevel gears 30b, 30bb, and the bevel gears 30b, 30bb
c and 25c, respectively.

A left and right mask drive lever 28 is provided beside the left mask 24. The left and right mask drive lever 28 is rotatably supported at its base 28 a by a fixing member (not shown) of the camera body 1. One arm of the lever 28 is extended by a tension spring 29 which is an elastic member. It is always urged to the lower side of the camera body 1, that is, counterclockwise in FIG.

An engagement arm 28c is provided at the tip of one arm of the left and right mask drive lever 28. The engagement arm 28c is connected to a fork 24d provided on the shaft 24a of the left mask 24. Is sandwiched between.

The operating arm 28b, which is the other arm of the left and right mask driving levers 28, is provided so as to extend upward on the rear side of the camera body 1, and is switched by the switching lever 26. When the operation is performed, the pressing portion 26d of the switching lever 26 is
8b, thereby rotating the left and right mask drive levers 28. When the left and right mask drive lever 28 is rotated, the left mask 24 is rotated via the fork portion 24d and the engagement arm 28c.

That is, by the operation of the switching lever 26, as shown in FIG. 3A, the engaging arm 28c of the left and right mask driving lever 28 moves in the direction of the arrow P in FIG. 3A. The fork 24d rotates the bevel gear 24c on the left mask 24 side clockwise in FIG. 3A. Therefore,
The trimming mask 24b on the left mask 24 side is in a retracted state in which it is retracted outside the finder screen.

At the same time, since the rotational driving force of the bevel gear 24c is meshed with the bevel gear 30b of the connection gear 30, the bevel gear 30b is rotated and the bevel gear 30b is rotated via the shaft 30a. The right mask 25 which is transmitted to the bevel gear 30bb and meshes with the bevel gear 30bb.
Is rotated counterclockwise in FIG. 3A. Thereby, the right mask 2
The trimming mask 25b on the fifth side is also in a retracted state in which it is retracted outside the finder screen.

As shown in FIG. 3B, the operation of the switching lever 26 causes the engaging arm 28c of the left and right mask driving lever 28 to move in the direction indicated by the arrow L in FIG.
By moving in the direction, the fork portion 24d rotates the bevel gear 24c on the left mask 24 side in a counterclockwise direction in FIG. 3B. Accordingly, the trimming mask 24b on the left mask 24 side is in a trimming state for trimming the view in the left-right direction of the finder screen.

At the same time, since the rotational driving force of the bevel gear 24c is meshed with the bevel gear 30b of the connecting gear 30, the bevel gear 30b is rotated, and the bevel gear 30b is rotated via the shaft 30a. The right mask 25 which is transmitted to the bevel gear 30bb and meshes with the bevel gear 30bb.
Is rotated clockwise in FIG. 3B. Thereby, the right mask 25 is formed.
The side trimming mask 25b is also in a trimming state for trimming the field of view of the finder screen in the left-right direction.

In this manner, the switching lever 26
Arm 2 of the left and right mask drive lever 28 by the operation of
8c, the trimming mask section 24 is moved.
The switching between the trimming state for trimming the view in the left and right direction of the finder screen by b and 25b and the retracting state in which the trimming mask sections 24b and 25b are retracted to the outside of the finder screen are interlocked with the operation of the switching lever 26. Is performed.

On the other hand, as shown in FIG. 2, the switching lever 26 is rotatably supported by a fixing member (not shown) of the camera body 1 at its base 26a. An arc-shaped operation knob 26b is provided at the tip of one arm extending toward the back side of the main body 1. The operation knob portion 26b is constituted by a knob portion disposed at a tip portion thereof, and a hole portion 26e forming a click mechanism disposed at one lower arm portion thereof, and the knob portion includes: Camera body 1
A guide groove (described later) provided on the wall surface on the back side of the
14 (see FIG. 14).

By sliding the knob of the operation knob 26b in the direction of arrow L or the direction of arrow P in FIG. 2 along the guide groove, the switching lever 26 rotates its base 26a. It rotates around the center, whereby the finder screen is switched.

Pressing ends 26f and 26g are provided at the respective distal ends of the operation knob 26b, and a P-switch 34 for detecting a screen trimming state, which will be described later, which is disposed in the camera body 1 in the vicinity thereof, L switch 35 (FIG. 4,
The switching of the on / off state of FIGS.
The operation is performed in conjunction with the operation of the switching lever 26.

Further, in the switching lever 26, the other arm portion extending forward of the camera body 1 is connected to the upper mask 22 and the lower mask 23, which are the first masks.
Are provided so as to be located in spaces between the respective operating arms 22e and 23e and the operating arm 28b of the left and right mask driving lever 28. Then, the upper mask 2
A pressing portion 26c for pressing the operating arms 22e, 23e is provided on the side of the second and lower masks 23 opposing the operating arms 22e, 23e. Is provided with a pressing portion 26d for pressing the operation arm 28b.

FIG. 4 is a block diagram showing an electric circuit of the camera. As shown in FIG. 4, a CPU 50 serving as control means for controlling the entire camera includes a release switch 53 which is a switch turned on by a release operation of a photographer, and a finder screen provided near the switching lever 26. A P switch 34 for detecting that the vertical view is trimmed, and a switch for detecting that the horizontal view of the finder screen is trimmed. The L switch 35 is turned on / off by turning the switching lever 26 to perform trimming of the finder screen and print size setting means 54 for setting a print size (finder screen). To set the shooting mode and shooting conditions Like shooting mode setting means 55 comprising a plurality of switches provided on are electrically connected.

Further, the CPU 50 includes a shutter drive circuit 56 for driving the shutter 9 as a control element which is controlled in response to an ON signal of the release switch 53, and a control circuit provided in the camera body 1. A motor driving circuit 57 for driving the provided film winding motor 58; a magnetic head driving circuit 59 for driving the magnetic head 11; and an on / off signal of the photographing mode setting means 55. The LED driving circuit 60 is a circuit for driving the LED 12 and the display driving circuit is a circuit for driving the finder display means 62 including the finder display devices 8A and 8B. 61, and a control element controlled by receiving an on / off signal of the print size setting means 54. Te, L to control the lighting of the LED72
The ED drive circuit 71 and the like are electrically connected. As described above, by the input signals from the various switches and the like,
The CPU 50 performs various drive controls via the various drive circuits and the like.

FIGS. 5 and 6 are central longitudinal sectional views showing the main part of the finder optical system of the camera, as viewed from the side of the camera. FIG. 5 shows a state where the finder screen is in full size, that is, when the upper and lower masks 22 and 23 and the left and right masks 24 and 25 are both in the retracted state, or in the left and right direction of the finder screen. FIG. 6 shows a trimming state (corresponding to a vertically long size) in which the visual field is trimmed, that is, a retracted state of the trimming masks 22b and 23b. FIG. The trimming masks 22b and 23
3B shows the trimming state (corresponding to the horizontally long size).
5 and 6, the direction indicated by the arrow F indicates the front side of the camera body 1.

As shown in FIGS. 5 and 6, the focusing screen 4 is held by the full-size mask 21 of the finder visual field switching mechanism 5 so as to be in close contact with the lower side thereof, and is positioned above the upper side thereof. The finder image reversing means 6 is provided. The finder image reversing means 6 includes a roof roof mirror 15 provided at the vertex of the camera body 1 and a mirror 16 provided at the front side of the camera body 1.

The roof roof mirror 15 is provided with a mirror holder 15b for holding the mirror 16 in front of the roof roof mirror 15, and a roof mirror 15a on the inner side. A reflection surface 16a is provided on the inner surface of the mirror 16.
Is provided.

Therefore, the subject image which is incident from below the camera body 1 along the finder optical axis O1 and is formed on the focusing screen 4 is transmitted through the focusing screen 4 and becomes the roof roof mirror 1
No. 5 roof mirror 15a and reflecting surface 1 of the mirror 16
The light is reflected by each of the eyepieces 6a and guided to the eyepiece lens 7 to be observed. That is,
The subject image formed on the focusing screen 4 can be observed by the eyepiece 7 as an erect image by the finder image reversing means 6.

Light rays incident on the upper end and lower end of the finder screen defined by the full size mask 21 are indicated by light rays O2 and O3 in FIGS. Mask 22,
As shown in FIG. 5, 23 is retracted outside the light beams O2 and O3 in its retracted state. The lower mask 23 is retracted and stored between the focusing screen 4 and the finder display device 8A. In the trimming state of the view in the vertical direction of the viewfinder screen,
As shown in FIG. 6, the upper and lower masks 22, 2
The ray defined by 3 is represented by rays O4, O5.

On the other hand, below the eyepiece 7, the finder display device 8A is provided. The finder display device 8A includes a finder display light emitting unit 17 which is a display light emitting member for displaying various photographing information and the like outside a screen frame on a lower side of the finder screen, and a display light beam emitted from the finder display light emitting unit 17; The display light guide prism 18 that guides light into the viewfinder is provided.

The display light guide prism 18 has a reflective surface 1
The roof mirror 15a of the roof roof mirror 15 positioned above the display light flux emitted from the finder display light emitting unit 17 by the reflection surface 18a.
Is reflected on the reflecting surface 1 of the mirror 16.
The light is guided into the finder through 6a.

At this time, the finder display light emitting section 17 is provided.
Of the display light beam emitted from the
The range surrounded by 1 and the light ray D2 at the upper end (indicated by hatching in FIGS. 5 and 6) indicates the range of the display light flux displayed outside the lower frame of the finder screen.

As described above, the LED 72 as the illuminating means and the condenser lens 73 are disposed above the eyepiece 7, but the switching lever 26 allows the finder field to have a vertically long panoramic size. When the switch is made to correspond to the screen, the P switch 34 is turned on, and the LED 72 is turned on. That LE
The illumination light from D72 is condensed by the condenser lens 73, and the fluorescent character marker 2 of “PANORAMA” on the trimming mask portion 23b moving to the full size mask 21 area.
Irradiate 3f. Ray D reflected by the character marker 23f
5 is reflected by the finder image reversing means 6, and the character marker 23 f is observed through the eyepiece 7.

When the finder screen is switched to the full size screen by the switching lever 26,
The trimming mask section 23b is retracted from the area of the full size mask 21, the P switch 34 is turned off, and the LED 72 is turned off.

FIGS. 7 and 8 are central longitudinal sectional views showing the main parts of the finder optical system of the camera, as viewed from behind the camera. FIG. 7 shows a state in which the viewfinder screen is in a full size, that is, when the upper and lower masks and the left and right masks are both in the retracted state, or the vertical view of the viewfinder screen is trimmed. FIG. 8 shows a trimming state in which the trimming masks 24b and 25b are retracted in the left and right direction. FIG. 8 shows a trimming state in which the view in the left and right direction of the finder screen is trimmed, that is, the trimming mask 24b in the left and right direction. 25B shows a trimming state.

As shown in FIGS. 7 and 8, the upper and lower masks 22, 2 described with reference to FIGS.
3, light rays incident on the right end and the left end of the finder screen defined by the full size mask 21 are indicated by light rays O6 and O7, and the left and right masks 24 and 25 are shown in FIG. As shown in FIG. 7, in the retracted state, the light rays O6 and O7 are retracted to the outside of the light rays O6 and O7. Also, the left and right masks 24, Light rays incident on the left end and right end of the finder screen defined in the trimming state of No. 25 are indicated by light rays O8 and O9 as shown in FIG.

On the other hand, below the roof roof mirror 15, there is provided a finder display device 8B for displaying an image on the side of the finder screen, and this finder display device 8B is provided with a screen on the side of the finder screen. It is composed of a finder display light emitting section 19 which is a display light emitting member for displaying various photographing information and the like outside the frame, and a display light guide prism 20 which guides a display light beam emitted from the finder display light emitting section 19 into the finder. Have been. The display light guide prism 20 is provided with a reflection surface 20a.
Is reflected by the roof mirror 15a of the roof roof mirror 15 located above, and is guided into the finder via the reflection surface 16a of the mirror 16.

At this time, the finder display light emitting section 19 is provided.
Of the display light beam emitted from the
The range surrounded by the light rays D4 on the lower side and the lower side (shown by hatching in FIGS. 7 and 8) indicates the range of the display light flux displayed outside the screen frame on the side of the finder screen.

FIGS. 9, 10 and 11 show screen frames of a finder screen in the camera.
Shows the state of the screen frame indicating the full size of the finder screen, and FIG. 10 shows the state of the screen frame when the vertical view of the finder screen is trimmed. FIG. 11 shows the states of the screen frames when the left and right directions of the finder screen are trimmed.

As shown in FIGS. 9, 10 and 11, the finder screen which can be observed from the eyepiece 7 is formed on the focusing screen 4 in a screen frame defined by the full size mask 21. The observed image is observed. At a substantially central portion of the focusing screen 4, for example, a distance measuring frame 4a or the like indicating a distance measuring range when performing automatic focusing is provided. The distance measuring frame 4a is formed by engraving or the like on the focusing screen 4. By this means, it is formed so as to be easily viewed.

In the outer portion of the screen frame defined by the full-size mask 21, display portions 51 and 52 in the finder are provided on the lower side and side portions thereof. This is because, as described above, the display luminous flux emitted from the finder display devices 8A and 8B is applied to the roof roof mirror 1 forming the finder image inverting means 6.
5. The light is guided to the eyepiece 7 via the mirror 16, and the guided display light flux is displayed by the display units 51 and 52 in the viewfinder and can be visually observed. It has become.

Then, the display units 51, 5 in the finder are displayed.
2 is, for example, shooting conditions such as a shutter speed and an aperture value,
The camera state such as the set photographing mode is displayed in a form that can be easily understood visually, for example, by displaying numbers, pictograms, and the like.

When the print size and the viewfinder screen are switched to the landscape panorama size screen by the switching lever 26, the character marker 23f indicating the landscape size is displayed at the position of the lower mask 23 in the landscape size field of view. It is displayed as a display.

The state shown in FIG. 9 is such that the upper and lower masks 22 and 23 and the left and right masks 24 and 2
5 is a retracted state in which the finder screen is retracted outside the screen frame of the full-size mask 21, and the finder screen observed from the eyepiece 7 is a full-size screen frame defined by the full-size mask 21. Is to be observed.

The state shown in FIG. 10 is a trimming state in which the vertical view of the finder screen is trimmed by the upper and lower masks 22 and 23. The left and right masks 24 and 25 are This is a retracted state in which the full-size mask 21 is retracted outside the screen frame.

Accordingly, the viewfinder screen viewed from the eyepiece 7 has a screen frame defined by the upper and lower masks 22 and 23 in the vertical direction, and the full frame in the horizontal direction. The screen frame defined by the size mask 21 is observed. In this switching state, the LED 72
Is illuminated, and the character "PANORAMA", which is the character marker 23f below the lower mask 23, is displayed as a display in the finder by the irradiation light.

In the state shown in FIG. 11, the left and right masks 24 and 25 are used to trim the view in the left and right direction of the finder screen. The upper and lower masks 22 and 23 are This is a retracted state in which the full-size mask 21 is retracted outside the screen frame.

Therefore, the viewfinder screen observed by the eyepiece 7 has a screen frame defined by the full size mask 21 in the vertical direction, and the left and right masks 24, 24 in the horizontal direction.
The screen frame defined by 25 is observed.

FIGS. 12, 13 and 14 are views when the main part of the finder visual field switching mechanism 5 of the camera is viewed from the side of the camera, and are for explaining the switching operation of the finder screen. FIG. 12 shows an initial state showing the full size of the finder screen, and FIG.
FIG. 14 shows a trimming state in which the vertical view of the finder screen is trimmed. FIG. 14 shows a trimming state in which the horizontal view of the finder screen is trimmed, and the vertical trimming masks 22b and 23 are shown.
"b" indicates the retracted state.

The finder visual field switching mechanism 5
Regarding the configuration around the switching lever 26 of
Although the description has been made with reference to FIG. 2 described above, the configuration of a detailed portion not shown in FIG. 2 will be described below.

As shown in FIGS. 12, 13, and 14, the operation knob 26b of the switching lever 26 is formed in an arc shape, and has press ends 26f and 26g at the respective ends. The P switch 34 and the L switch 35 are located on the rotation circumference of the operation knob 26.
Are fixed to a fixing member (not shown) in the camera body 1. This P switch 34, L switch 35
Is normally in an off state, and the pressing end 26f,
By being pressed by 26g, it is turned on.

As described above, the exterior knob 38, which is the wall surface on the back side of the camera body 1, has the operation knob 2 as described above.
A guide groove 38d is provided so that the knob portion 6b protrudes to the outside of the camera body 1. The knob portion of the operation knob portion 26b is moved along the guide groove in the direction of arrow L in FIG. By sliding in the P direction,
By rotating the switching lever 26, the field of view of the finder screen is switched.

Further, the switching member 26 is fixed to the inner wall surface of the exterior member 38 at a position opposing the lower portion of the operation knob 26b so as to conform to the shape of the operation knob 26b. A member is provided, at least 3
There are provided V-shaped click grooves 38a, 38b, 38c, and the operation knob portion 26b rotates along the fixing member. As described above, the hole 26e is disposed in the lower arm of the operation knob 26b of the switching lever 26, and the hole 26e and the elastic member disposed therein are provided. Correspond to the compression spring 37 and the ball 36 to form a click mechanism.

The hole 26e of the operation knob 26b
As described above, the compression spring 37 and the ball 36 are provided in the inside, and the ball 36 is moved by the urging force of the compression spring 37 to the exterior member 38 of the camera body 1.
The inner wall surface is always urged against the fixing member.

In the three click grooves 38a, 38b and 38c of the operation knob 26b, the center click groove 38a is located at the position where the click is stopped when the viewfinder screen is in the full size state. The lower click groove 38b is located at a position where the click is stopped when the viewfinder screen is vertically trimmed, and the upper click groove 38c is positioned when the viewfinder screen is horizontally trimmed. Are arranged so as to correspond to the positions where the click stops are made.

On the other hand, the upper and lower masks 2, which are rotated by the urging force of the tension spring 27, are rotated.
Numerals 2 and 23 are fixed members disposed in the camera body 1 in a normal state, that is, in the retracted state, and are in contact with fixing pins 31 and 32 which are retracting position regulating means. As a result, the upper and lower masks 22 and 23 are kept in their retracted state.

The left and right mask driving levers 28, which are rotated by the urging force of the tension springs 29, are provided.
Is in a normal state, that is, in the retracted state, abuts a fixing pin 33 which is a fixed member disposed in the camera body 1 and is a retracting position regulating means,
Thereby, the left and right masks 24 and 25 are formed.
Are kept in the retracted state.

The operation of the finder switching mechanism in the camera according to the first embodiment having the above-described configuration will be described below with reference to FIGS. 12, 13 and 14. In the state shown in FIGS. 2 and 12, the finder screen is an initial state showing a full size,
The field of view of the finder screen observed by the above is the state shown in FIG. In this initial state, the upper mask 22 and the lower mask 23 and the left mask 2
The fourth mask 4 and the right mask 25 are both retracted from the focusing screen 4 that defines the field of view of the finder screen. In this state, the ball 36 in the hole 26e of the operation knob 26b of the switching lever 26 is in a state of being inserted into the central click groove 38a of the exterior member 38, so that the initial state is maintained. Have been. The pressing ends 26f and 26g of the operation knob 26b of the switching lever 26 are both
The switch 34 and the L switch 35 are not pressed, and both are off.

First, in the initial state shown in FIG. 12, when the knob of the operation knob 26b of the switching lever 26 is rotated in the direction of arrow P in FIG. 12, the switching lever 26 is turned clockwise in FIG. As shown in FIG. 13, the ball 36 in the hole 26e of the operation knob 26b is inserted into the lower click groove 38b.
By entering, it is held at this click stop position.

The pressing portion 2 of the switching lever 26
6c, the operating arms 22e, 23e of the upper and lower masks 22, 23 are pressed, so that the upright bent portions 22c of the upper and lower masks 22, 23,
The trimming mask portions 22b and 23b are rotated in a direction in which the trimming mask portions 22b and 23b enter the finder screen against the biasing force of the tension spring 27, and a trimming state is performed in which the vertical view of the finder screen is trimmed. .

The pressing end 2 of the operation knob 26b
By pressing the P switch 34 by 6f, the P switch 34 is turned on, while the L switch 35 is kept off. At this time,
The field of view of the finder screen observed by the eyepiece 7 is as shown in FIG.

On the other hand, in the initial state, the knob of the operation knob 26b of the switching lever 26 is
14, the switching lever 26 rotates counterclockwise in FIG.
As shown in FIG. 7, the ball 36 in the hole 26e of the operation knob 26b enters the upper click groove 38c and is held at the click stop position.

The pressing portion 2 of the switching lever 26
6d, the operating arm 28b of the left and right mask drive lever 28 is pressed, so that the operating arm 28b
Rotates clockwise in FIG. Then, as described in FIG. 3B, the engagement arm 28c of the left and right mask drive lever 28 is moved by the tension spring 29.
3B, the fork portion 24d moves the bevel gear 24c on the left mask 24 side in the counterclockwise direction by moving in the direction of the arrow L in FIG. 3B (clockwise in FIG. 14). Is rotated to set the trimming mask 24b on the left side mask 24 side to a trimming state for trimming the visual field in the left-right direction of the finder screen.
The rotation of the left mask 24 is controlled by the connection gear 3
The trimming mask portion 25b is transmitted to the right mask 25 through the direction 0, and is rotated in a direction to enter the finder screen, thereby bringing the trimming mask portion 25b into a trimming state for trimming the left and right view of the finder screen. . Thereby, the trimming mask section 2
4b and 25b are in a trimming state for trimming the visual field in the left and right direction of the finder screen.

Then, the pressing end 2 of the operation knob 26b
When the L switch 35 is pressed by 6g, the L switch 35 is turned on, while the P switch 34 is kept off. At this time, the field of view of the finder screen observed by the eyepiece 7 is as shown in FIG.

Note that, from the trimming state (FIG. 13) for trimming the vertical field of view of the finder screen, the trimming state (FIG. 1) for trimming the horizontal field of view.
When switching to 4) is performed, or switching from the trimming state (FIG. 14) for trimming the visual field in the horizontal direction of the finder screen to the trimming state (FIG. 13) for trimming the visual field in the vertical direction is performed. In such a case, the switching operation of the switching lever 26 is always switched through the initial state (FIG. 12).

That is, when the above-mentioned trimming states are switched, the upper and lower masks 22 and 23 and the left and right masks 24 and 25 are used.
Are switched to the next state after the initial state, which is a retreat state in which all retreat outside the viewfinder screen.

Next, a series of operations at the time of taking a picture in a camera to which the above-mentioned camera viewfinder switching mechanism 5 is applied will be described with reference to FIG.

First, when photographing is performed, as described above, the switching lever 26 is turned on prior to photographing.
By operating the knob of the operation knob 26b of
By performing the switching operation of the finder visual field switching mechanism 5, the aspect ratio of the shooting screen is set.

At this time, the P switch 34 and the L switch 35 are operated in conjunction with the switching operation for switching the field of view of the finder screen by operating the switching lever 26. The two switches 34 and 35 constitute the print size setting means 54, and the output signals from the P switch 34 and the L switch 35 at this time determine
The print size (aspect ratio of the photo print) at the time of finishing the photo print is set.

When the finder screen is switched to the landscape screen (panorama size screen), the P switch 34 is turned on, the LED 72 is turned on, and the upper and lower masks 22 and 23 are inserted into the full size view screen. , "PANORAMA" is displayed as a display in the viewfinder.

By operating a plurality of switches of the photographing mode setting means 55, setting of a desired photographing mode and the like, for example, setting of various photographing modes or photographing conditions such as a shutter speed and an aperture value can be performed. Do. The shooting conditions and the like set here are output to the CPU 50,
The information is transmitted to corresponding driving circuits and the like disposed in the camera body 1 and displayed in the finder by the finder display means 62 including the finder display devices 8A and 8B via the display driving circuit 61. Is done.

Next, when an ON signal is output to the CPU 50 by the release operation of the release switch 53, the CPU 50 receives the release signal and drives the shutter 9 via the shutter drive circuit 56. I do. Thus, exposure on the film 10 is performed.

Then, the film 1 by the shutter 9
When the exposure on the zero plane is completed, the CPU 50 drives the film winding motor 58 via the motor driving circuit 57. Thus, for example, a film winding operation to the next frame is started.

At the same time as the film winding operation is performed, the CPU 50 drives the magnetic head 11 via the magnetic head driving circuit 59 and outputs various kinds of information such as print size information set by the print size setting means 54. The photographing information is recorded on the magnetic recording section of the film 10, and the CPU 50 drives the LED 12 via the LED drive circuit 60, and prints the print size information and the like set by the print size setting means 54. Optical recording is performed by exposing the outside of the exposure screen frame on the film 10 surface.

When the winding operation of one frame of the film 10 by the film winding motor 58 is completed, the CPU 50 stops the winding operation of the film winding motor 58 via the motor driving circuit 57. Thus, a series of operations for photographing one frame is completed.

In this manner, the photographing operation of each frame is repeated, and when the photographing of the last frame of the film 10 is completed, the CPU 50 starts the rewinding operation of the film 10 and the camera body 1 The film that has already been wound up is stored in the film cartridge.

After the film cartridge in which the photographed film is stored is taken out of the camera main body 1, in a normal case, for example, a photographic processing laboratory (lab) for performing photographic film development processing, photographic print processing, and the like. ), Etc., are requested for development processing and photographic print processing.

In the above-mentioned photographic development station, first, after the above-mentioned photographed film is developed, the photographic print processing is performed. At this time, a printer having information reading means capable of reading photographing information such as print size information magnetically or optically recorded on the film 10 is used for a printer or the like for performing a photographic print process. Shall be.

When a photographic printing process is performed by a printer having information reading means of a magnetic or optical recording unit on the film surface, as described above, the camera body 1 is used for taking a picture. Magnetic head 11
The film 10 recorded by the camera or the LED 12 or the like
The print size information and the like on the surface are read by information reading means such as the above-described printer which performs photo printing, and a photo print process is performed based on various kinds of photographing information and the like read by the information reading means.

Then, in the above-mentioned photographic development laboratory, the film subjected to the development processing as described above, and the photographic print and the like created based on the film are returned to the client.

As described above, according to the camera of the embodiment, the finder field switching mechanism 5 for selectively switching the field of view of the finder screen is provided. Trimming mask section 22 for trimming the field of view
When the retracted state is set to retract the b, 23b, 24b, and 25b, the mechanism itself can be easily reduced in size by effectively utilizing the extra space in the camera body 1. Therefore, it is possible to contribute to downsizing of the camera having the finder visual field switching mechanism 5.

The finder visual field switching mechanism 5
When the field of view of the finder screen is switched to, for example, a horizontally long screen (panorama size), the character mark 23f of "PANORAMA" on the mask is displayed by the LED 72.
Can be displayed as a display in the finder by the irradiation light of, so that the switched finder screen size can be reliably recognized. In particular, since no subject light is used, the subject can be clearly identified even when the subject is dark. In addition, it is only necessary to print a marker serving as a display unit on a trimming mask, and the configuration is not complicated. Further, as described above, the character marker 23 is used.
If f is printed with fluorescent fluorescent paint, the LED 72 is not required, and further reduction in size and cost can be realized.

According to the above-described embodiment, (1) a field frame which can be inserted and retracted in the field of view of the finder, a display unit having a printing unit provided on the field frame, and a display unit on the field frame are illuminated. And a switching unit is switched by the finder field by inserting and retreating the field frame, and the lighting unit is turned on and off in conjunction with the switching operation. A finder field frame switching device can be proposed.

[0104]

As described above, according to the present invention, the occupied space is small, and even if the subject is in a dark state, the visibility of the display section provided on the field frame is good. In addition, it is possible to provide a finder field frame switching device of a camera which can be reduced in cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a camera incorporating a finder visual field switching mechanism (apparatus) according to an embodiment of the present invention, and is a schematic configuration diagram when viewed from a side of the camera.

FIG. 2 is an essential part perspective view showing a finder visual field switching mechanism of the camera according to the embodiment.

FIG. 3 is a detailed view of a main part of an interlocking mechanism of a second mask (left and right masks) in the finder visual field switching mechanism of the camera according to the embodiment, as viewed from the front side of the camera. FIG. 3A is a view showing a retracted state of the left and right masks from the finder screen, and FIG. 3B is a view showing a trimmed state obtained by trimming the finder screen in the left-right direction.

FIG. 4 is a block diagram showing an electric circuit of the camera according to the embodiment.

FIG. 5 is a central vertical cross-sectional view showing a main part of a finder optical system of the camera according to the embodiment, showing both upper and lower masks and left and right masks, or a retracted state of the upper and lower masks.

FIG. 6 is a central longitudinal sectional view showing a main part of a finder optical system of the camera according to the embodiment, showing a trimming state of the upper and lower masks.

FIG. 7 is a central vertical cross-sectional view showing a main part of a finder optical system of the camera according to the embodiment, viewed from the rear, and showing both the upper and lower masks and the left and right masks, FIG. 7 is a view illustrating a state where the side mask is retracted.

FIG. 8 is a central longitudinal sectional view showing a main part of a finder optical system of the camera according to the embodiment, and is a view when viewed from the rear, showing a trimming state of left and right masks.

FIG. 9 is a diagram showing a state of a finder screen in the camera according to the embodiment, and showing a state of a screen frame showing a full size of the finder screen.

FIG. 10 is a view showing a state of a finder screen in the camera according to the embodiment, and showing a state of a screen frame showing a case where the vertical direction of the finder screen is trimmed.

FIG. 11 is a diagram showing a state of a finder screen in the camera according to the embodiment, and showing a state of a screen frame showing a case where the left and right directions of the finder screen are trimmed.

FIG. 12 is a diagram illustrating a main part of a finder visual field switching mechanism of the camera according to the embodiment when viewed from the side of the camera, and is a diagram for explaining a finder screen switching operation, and is a view illustrating a full viewfinder screen; The figure which shows the initial state which shows a size.

FIG. 13 is a diagram of a main part of a finder visual field switching mechanism of the camera according to the embodiment when viewed from the side of the camera, and is a diagram for explaining a finder screen switching operation, The figure which shows the trimming state in which the direction was trimmed.

FIG. 14 is a diagram of a main part of a finder visual field switching mechanism of the camera according to the embodiment when viewed from the side of the camera, illustrating a finder screen switching operation; FIG. 10 is a diagram illustrating a retracted state in which a vertical trimming mask is retracted in a trimming state in which a direction is trimmed.

[Explanation of symbols]

 23... Lower mask (field frame) 23 f... Character marker (display unit having a printing unit) 72... LED (lighting means) 73.

Claims (3)

[Claims] 1. A finder field frame switching device for a camera, comprising: a field frame that can be inserted into and retracted from a field of view of a finder; and a display unit having a printing unit provided on the field frame. 2. The device according to claim 1, wherein the printing section of the display section is made of a fluorescent paint. 3. The finder field frame switching device for a camera according to claim 1, further comprising illumination means for illuminating a display section on the field frame.