JP3458008B2 - camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera using a film capable of recording aspect ratio information of photographic prints, etc., and a display for displaying a viewfinder field switching mechanism and the state of the camera in the viewfinder. The present invention relates to a camera having a device.

[0002]

2. Description of the Related Art In recent years, when a photograph is taken with a single-lens reflex camera or the like, a desired aspect ratio of a finder screen is set, and the set aspect ratio information and the like are provided on a film surface. A camera and a film capable of performing magnetic recording on a magnetic recording unit or the like, and optically recording on a portion outside the photographing screen frame on the film surface by a light emitting member such as a light emitting diode (LED). However, various proposals have been made.

For example, a camera disclosed in Japanese Patent Laid-Open No. 1-282531 has a viewfinder screen aspect ratio setting means and a recording means for recording the aspect ratio information set by the setting means on a film surface. And a light emitting diode (L
Optical information recording is performed on the film surface by using a light emitting member such as ED).

Further, the camera disclosed in Japanese Utility Model Laid-Open No. 5-6439 includes means for setting a finder mask having a plurality of field frames and means for recording trimming information, and prior to taking a photograph. The above-mentioned view frame is set to take a picture, and after the picture is taken, the finder mask is returned to the initial position in conjunction with the shutter release operation.

On the other hand, in recent years, a part of the upper and lower parts of the photographing screen on the film is shielded at the time of photographing,
Various types of photographic prints, such as so-called panorama size prints and high-definition size prints, which are designed to obtain photographic prints with a landscape screen, have been proposed and are in widespread use.

When a photograph is taken by setting various print formats as described above, there is one in which a screen frame of the photographing screen is displayed by marking, for example, on the focusing screen of the camera. , Is generally put into practical use.

Further, when the above various print formats are set and a picture is taken, a trimming mask for trimming the vertical field of view of the finder screen and a position that does not interfere with the operating range of the trimming mask, that is, Various types of finder display devices arranged on the side of the finder screen to display which format is set by the display in the finder have been proposed and put into practical use.

[0008]

However, according to the means disclosed in Japanese Patent Laid-Open No. 1-282531 and Japanese Utility Model Laid-Open No. 5-6439, when trimming sizes are plural, However, there is a problem that the size of the camera becomes large because the finder mask retreat space becomes large.

On the other hand, in a camera which displays a finder screen frame of various print formats by imprinting a mark on the focusing screen, the entire screen is always observed in the finder. There is a possibility that framing with the screen frame of the format that is set becomes difficult and the framing is decided based on the screen frame that is different from the actually set format and the picture is taken. .

Further, according to the arrangement of the conventional finder display device, in the camera in which a plurality of trimming masks for trimming the vertical and horizontal fields of view of the finder screen are arranged, the plurality of trimming masks are arranged. There is a problem that it is difficult to arrange the finder display device at a position where it does not interfere with the entire working range of the mask.

An object of the present invention is to solve the above-mentioned conventional problems, and in a single-lens reflex camera having a viewfinder field switching mechanism and a viewfinder display device, a viewfinder field for trimming the viewfinder screen in the vertical and horizontal directions. It is an object of the present invention to provide a camera that is smaller in size by reducing the space occupied by the switching mechanism in the camera body and devising the layout of the finder display device.

[0012]

A first camera according to the present invention is a single-lens reflex camera capable of setting an aspect ratio of a photographic screen and recording the aspect ratio information on a film. Select a focusing screen provided on the image plane, a full size mask provided near the focusing screen to indicate the full size of the viewfinder screen, a trimming mask that enables trimming a part of the viewfinder screen, and the trimming mask And a finder display device arranged near the focusing screen for displaying photographing information in the finder, the switching means being selectively moved by the switching means. The trimming mask is used in the viewfinder in the trimming state. In the retracted state, the trimming mask is moved so as to be retracted and stored outside the display luminous flux of the finder display device. It is characterized in that a display light flux transmission window for transmitting the display light flux of the finder display device is formed. Further, the second camera according to the present invention sets the aspect ratio of the photographing screen,
In a single-lens reflex camera capable of recording this aspect ratio information on a film, a focusing screen provided on the image plane of the finder image and a full screen showing the full size of the finder screen provided near the focusing screen. A size mask, a pair of first masks that can be trimmed in the vertical direction of the finder screen, and are pivotally supported between a retracted position and a trimming position, and a retracted position that can be trimmed in the horizontal direction of the finder screen. And a trimming position, a pair of second masks rotatably supported between the first mask and the second mask, and a switching means for selectively moving the first mask and the second mask to the trimming position and the retracted position, respectively. And between the focusing screen and the first and second masks, and the focusing screen. Disposed in the vicinity of the emissions, comprising a viewfinder display device for displaying photographing information in the finder,
At least one of the first mask and the second mask that is switched and moved by the switching means enters the display light beam of the finder display device at the trimming position, and the finder display device at the retracted state. The trimming mask is provided with a display light flux transmission window for transmitting the display light flux of the finder display device when the trimming mask is in the trimming state. Characterize. Furthermore, the third camera according to the present invention is a single-lens reflex camera capable of setting the aspect ratio of a photographic screen and recording this aspect ratio information on film, and the focusing provided on the image plane of the finder image. Screen, a full-size mask provided near the focusing screen to indicate the full size of the finder screen, a trimming mask that enables trimming a part of the finder screen, and the trimming mask to selectively trim and save The trimming mask, which is moved near the focusing screen and has a viewfinder display device for displaying photographing information in the viewfinder, which is moved by the switching means . When transmitting the above display luminous flux
It has a display light flux transmission window,
Is retracted outside the display light flux of the viewfinder display device, enters the optical path of the display light flux of the viewfinder display device while switching from the retracted state to the trimming state, and when the trimming state is reached, the finder image is displayed.
A part of the surface is trimmed and the display luminous flux transmission window is displayed.
It is characterized in that the display light flux is transmitted .

[0013]

[0014]

[0015]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a diagram showing a configuration of a camera of a first embodiment of the present invention and is a schematic configuration diagram when viewed from the side of the camera.

As shown in FIG. 1, in the first embodiment, for example, a single-lens reflex camera is illustrated.
A photographing lens 2 which is a photographing optical system is arranged in front of the camera body 1. An incident light ray incident from the photographing lens 2 is incident along the optical axis O1 thereof, and is moved by a movable reflection mirror 3 provided in a mirror box arranged in a substantially central portion of the camera body 1 to a camera. It is reflected to the upper side of the main body 1, is focused on the focusing screen 4 and is diffused and transmitted, and is transferred to the finder image inverting means 6 via the finder visual field switching mechanism 5 arranged above the focusing screen 4. In the finder image inverting means 6, the direction is changed and the light is guided to the eyepiece lens 7. As a result, the subject image formed on the focusing screen 4 can be observed.

The movable reflecting mirror 3 is composed of, for example, a quick return mirror or the like. That is, the movable reflection mirror 3 is fixed to the fixed member in the mirror box of the camera body 1 at one end portion on the upper side thereof.
It is rotatably supported by the shaft 3a, and is set at an angle of about 45 ° with respect to the optical axis O1 in the normal state of the camera, that is, when the subject image is observed by the finder. It is installed diagonally. Then, when the exposure is performed in conjunction with the release operation at the time of taking a picture, the movable reflecting mirror 3 is rotated upward of the camera to be retracted from the optical axis O1. ing.

Further, the viewfinder field switching mechanism 5 is
When a desired viewfinder screen aspect ratio is set prior to taking a picture, this is a mechanism for selectively changing the viewfinder screen's field of view vertically or horizontally to full size or trimming. is there.

Further, the finder image inverting means 6 is
For example, a penta roof prism or a finder image reversal optical system formed by combining a roof roof mirror and a plane mirror is used, and the subject image formed on the focusing screen 4 is passed through the eyepiece lens 7 through the eyepiece lens 7. It is provided so that it can be observed as an erect image when observing.

On the other hand, near the finder image inverting means 6, finder display devices 8A and 8B (however, 8B is not shown in FIG. 1; details will be described later) are provided. The display light rays D emitted from 8A and 8B are adapted to be guided to the eyepiece lens 7 through the finder image inverting means 6, whereby various photographing information and the like are displayed on the screen frame of the finder screen. It is designed to be displayed on the outer side of.

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 recording-capable magnetic material or the like is applied (coated) on the back side of the roll-shaped film 10 to form a magnetic recording portion. Therefore, various kinds of photographing information and the like are recorded in this magnetic recording unit.

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

In addition, inside 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 or the like is provided.
By exposing the photographing information such as the aspect ratio of the photographing screen to the outer portion of the photographing screen frame on the 0th surface, it is possible to optically record the information.

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

As shown in FIG. 2, the finder visual field switching mechanism 5 has a visual field of the finder screen, that is,
A full-size mask 21, which is a screen frame showing the full-size state of the shooting screen, is provided, and the focusing screen 4 is held below the full-size mask 21 so as to be substantially in close contact therewith.

In the vicinity of the full-size mask 21, a pair of first and second screen frames, each having an aspect ratio so as to be a horizontally long screen with respect to the full-size screen, are formed by trimming the vertical field of view of the finder screen. An upper mask 22 and a lower mask 23, which are the first mask, are provided.

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 plate members.
b, vertical bending portions 22c and 22cc on the upper mask 22 side and vertical bending portions 23c and 23cc on the lower mask 23 side, respectively, which are provided on both ends of each of the vertical bending portions 22c and 22c. 22cc, 23c, and 23cc provided on the holes 22a and 22aa (upper mask 22
Side) and holes 23a, 23aa (lower mask 23)
The 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 have the holes 22a, 22a.
The trimming mask portions 22b, 23 are rotated by rotating the respective a, 23a, 23aa as rotation centers.
b trims the vertical field of view of the viewfinder screen.

Further, the standing bent portions 22c and 23c are provided with arm portions 22d and 23d extending upward, and a tension spring which is an elastic member is provided between the arm portions 22d and 23d. 27 is stretched, and the upper mask 22 and the lower mask 23 are always urged so as to be in a retracted state.

Further, the standing bent portions 22c and 23c are provided with operating arms 22e and 23e extending toward the inside thereof, respectively, and a switching lever 26 (details thereof are provided below the operating arms 22e and 23e). When the switching operation is performed by the (described later)), the pressing portion 26c of the switching lever 26 presses the operating arms 22e and 23e, so that the upper mask 22 and the lower mask 23 rotate. It has become.

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

The pair of second masks, that is, the left mask 24 and the right mask 25, are trimming mask portions 24b, 2b, which are mask plates made of plate members.
5b is provided, and shaft portions 24a and 25a are provided at one end portions in the width direction thereof, respectively. This shaft portion 24a, 2
5a is rotatably supported by a fixing member (not shown) in the camera body 1, and the bevel gears 24c and 25c are connected to the above-mentioned bevel gears 24c and 25c at the end located on the front side of the camera body 1. The shaft portions 24a and 25a are integrally provided.

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, d is the shaft portion 24a and the fork portion 24d. It is adapted to rotate integrally with the bevel gear 24c.

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

A left and right mask drive lever 28 is disposed on the side of the left mask 24. The left and right mask drive levers 28 are rotatably supported by a fixing member (not shown) of the camera body 1 at a base portion 28a, and one arm portion thereof 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 engaging arm 28c is provided at the tip of one arm of the left and right mask drive lever 28, and this engaging arm 28c is a fork portion 24d provided on the shaft 24a of the left mask 24. Is sandwiched between.

The actuating arm 28b, which is the other arm of the left and right mask drive lever 28, is provided so as to extend toward the upper side on the back 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 presses the operating arm 28b, thereby rotating the left and right mask drive lever 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 operating the switching lever 26, as shown in FIG. 3 (A), the engaging arm 28c of the left / right mask drive lever 28 is moved to the arrow P in FIG. 3 (A).
By moving in the direction, the fork portion 24d is configured to rotate the bevel gear 24c on the left mask 24 side in the clockwise direction in FIG. 3 (A). Therefore, the trimming mask 24b on the left mask 24 side is in a retracted state where it is retracted to the outside of the finder screen.

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

Further, as shown in FIG. 3B, by operating the switching lever 26, the engagement arm 28c of the left and right mask drive lever 28 moves in the direction of arrow L in FIG. 3B. The fork portion 24d is configured to rotate the bevel gear 24c on the left mask 24 side in a counterclockwise direction in FIG. 3 (B). Accordingly, the trimming mask 24b on the left mask 24 side is in a trimming state for trimming the visual field in the left-right direction of the finder screen.

At the same time, since the rotational driving force of the bevel gear 24c meshes with the bevel gear 30b of the connecting gear portion 30, the bevel gear 30b is rotated and, at the same time, via the shaft portion 30a. The right mask 25 that is transmitted to the bevel gear 30bb and meshes with the bevel gear 30bb.
The bevel gear 25c is rotated clockwise in FIG. 3 (B). Thereby, the right mask 25
The side trimming mask 25b is also in a trimming state for trimming the horizontal field of view of the finder screen.

In this way, the engaging arms 28c of the left and right mask drive levers 28 are operated by operating the switching lever 26.
By moving the trimming mask portion 24b,
A trimming state for trimming the horizontal field of view of the finder screen by 25b, and the trimming mask section 2
Switching of the retracted state in which 4b and 25b are retracted to the outside of the viewfinder screen is performed in conjunction with the operation of the switching lever 26.

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 portion 26a, and the switching lever 26 has a camera. An arc-shaped operation knob portion 26b is disposed at the tip of one arm portion extending toward the back side of the main body 1. The operation knob portion 26b is composed of a knob portion arranged at the tip portion thereof and a hole portion 26e forming a click mechanism arranged at the lower one arm portion thereof, and the knob portion is A guide groove (not shown in FIG. 2; details will be described later; see FIGS. 12 to 14) provided on the back wall surface of the camera body 1 projects outside the camera.

Then, by sliding the knob portion of the operation knob portion 26b along the guide groove in the direction of arrow L or arrow P in FIG.
However, the base portion 26a is rotated about the rotation center, whereby the finder screen is switched.

Pressing ends 26f and 26g are provided at the tip of each of the operation knobs 26b, and P switches 34 and L arranged in the camera body 1 in the vicinity thereof.
Switching of the switch 35 (not shown in FIG. 2; details will be described later; see FIGS. 4 and 12 to 14) between the ON and OFF states is linked to the operation of the switching lever 26. It is supposed to be done.

Further, in the switching lever 26, the other arm portion extending to the front side of the camera body 1 serves as the operating arms 22e and 23e of the upper mask 22 and the lower mask 23 which are the first masks. It is provided so as to be located in a space sandwiched between the left and right mask drive levers 28 and the operating arm 28b. Then, on the side of the upper mask 22 and the lower mask 23 that opposes the operating arms 22e, 23e, a pressing portion 26 that presses the operating arms 22e, 23e.
c is provided, and a pressing portion 26d that presses the operating arm 28b is provided on the side of the left and right mask drive levers 28 that opposes the operating arm 28b.

FIG. 4 is a block diagram showing the electric circuit of the camera. As shown in FIG. 4, a CPU 50, which is a control unit that controls the entire camera, is provided near a release switch 53, which is a switch that is turned on by a photographer's release operation, and the switching lever 26. , A P switch 34 which is a switch for detecting that the vertical field of view of the finder screen is trimmed, and detects that the horizontal field of view of the finder screen is trimmed. L switch 35 which is a switch
Is turned on (O by turning the switching lever 26).
N) / OFF (OFF) to trim the field of view of the finder screen and set the print size (finder screen).
And a photographing mode setting means 55 including a plurality of switch groups provided for setting various photographing modes and photographing conditions at the time of taking a photograph are electrically connected.

At the same time, the CPU 50 receives the ON signal of the release switch 53 and receives the C signal.
The shutter 9 is controlled by the control signal output from the PU 50.
A shutter drive circuit 56 that is a circuit for driving the
A motor drive circuit 57, which is a circuit for driving a film winding motor 58 provided in the camera body 1, in response to a control signal output from the CPU 50 in response to an ON signal of the release switch 53. C above
The magnetic head 11 is controlled by a control signal from the PU 50.
Magnetic head drive circuit 59 which is a circuit for driving
And a control signal from the CPU 50 causes the LE
LED drive circuit 60 which is a circuit for driving D12
And a display drive circuit 61 which is a circuit for driving the in-finder display means 62 including the finder display devices 8A and 8B in response to a control signal from the CPU 50.
Etc., and is electrically connected to various drive circuits. Then, the CPU 50 performs various drive controls by the various drive circuits and the like in response to input signals from the various switches and the like.

FIGS. 5 and 6 are central longitudinal cross-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 full-size viewfinder screen, that is, when both the upper and lower masks 22 and 23 and the left and right masks 24 and 25 are in the retracted state, or in the horizontal direction of the viewfinder screen. When the field of view is trimmed, that is, the trimming masks 22b, 2 are
3B shows the retracted state, and FIG. 6 shows the trimmed state of the trimming masks 22b and 23b when the vertical field of view of the finder screen is trimmed. The direction indicated by arrow F in FIGS. 5 and 6 indicates the front side of the camera body 1.

As shown in FIGS. 5 and 6, the full-size mask 21 of the finder visual field switching mechanism 5 holds the focusing screen 4 on the lower side thereof so as to be in close contact therewith, and on the upper side thereof. The finder image inverting means 6 is provided. The finder image reversing means 6 is composed of a roof roof mirror 15 arranged at the top of the camera body 1 and a mirror 16 arranged on the front side of the camera body 1.

The roof roof mirror 15 is provided with a mirror holding portion 15b for holding the mirror 16 on the front side thereof, and a roof mirror 15a is provided on the inner surface side thereof. Further, the reflecting surface 16a is provided on the inner surface side of the mirror 16.
Is provided.

Therefore, the subject image incident from below the camera body 1 along the finder optical axis O1 and imaged on the focusing screen 4 passes through the focusing screen 4 and the roof roof mirror 1
No. 5 roof mirror 15a and the reflecting surface 1 of the mirror 16
Each of the light beams is reflected by 6a and guided to the eyepiece lens 7 for observation. 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 inverting means 6.

Light rays incident on the upper and lower ends of the viewfinder 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 to the outside of the light rays O2 and O3 in the retracted state. The lower mask 23 is retracted and housed between the focusing screen 4 and the finder display device 8A. Also, in the trimming state of the vertical view of the viewfinder screen,
As shown in FIG. 6, the upper and lower masks 22, 2 are
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 arranged. The finder display device 8A includes a finder display light emitting section 17 which is a display light emitting member for displaying various photographing information and the like on the outside of the screen frame on the lower side of the finder screen, and a display light flux emitted from the finder display light emitting section 17. The display light guide prism 18 guides light into the finder.

The display light guide prism 18 has a reflecting surface 1
8a is provided, and the display light flux emitted from the finder display light-emitting portion 17 is reflected by the reflecting surface 18a. The roof mirror 15a of the roof roof mirror 15 located above the roof mirror 15a.
The reflection surface 1 of the mirror 16 is reflected by
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 flux emitted from the
The range surrounded by 1 and the light beam D2 at the upper end (hatched portion in FIGS. 5 and 6) indicates the range of the display luminous flux displayed outside the screen frame on the lower side of the finder screen.

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

As shown in FIGS. 7 and 8, the upper and lower masks 22 and 2 described with reference to FIGS.
Similarly to 3, the light rays incident on the right end portion and the left end portion of the field of view of the finder screen defined by the full size mask 21 are displayed by light rays O6 and O7,
As shown in FIG. 7, the left and right masks 24 and 25 are designed to be retracted outside the light rays O6 and O7 in the retracted state, and the left and right visual fields of the finder screen are Light rays incident on the left end and the right end of the finder screen defined in the trimming state, that is, in the trimming states of the left and right masks 24 and 25 are, as shown in FIG.
8, indicated by O9.

On the other hand, below the roof roof mirror 15, there is provided a finder display device 8B for displaying on the side of the finder screen. This finder display device 8B is a screen on the side of the finder screen. A finder display light emitting portion 19 which is a display light emitting member for displaying various photographing information and the like outside the frame, and a display light guiding prism 20 which guides the display light flux emitted from the finder display light emitting portion 19 into the finder. Has been done. The display light guide prism 20 is provided with a reflecting surface 20a, and the reflecting surface 20a allows the finder display light emitting section 19 to be formed.
The display light flux emitted from the above is reflected by the roof mirror 15a of the roof roof mirror 15 located above, so that it is guided into the finder through the reflecting surface 16a of the mirror 16.

The finder display light emitting portion 19 at this time
Of the display light flux emitted from the
The range surrounded by 3 and the light beam D4 on the lower end side (hatched portion in FIGS. 7 and 8) indicates the range of the display luminous flux displayed outside the screen frame on the side of the finder screen.

FIGS. 9, 10, and 11 are views showing the screen frame of the finder screen in the camera.
Shows the state of the screen frame showing the full size of the finder screen, and FIG. 10 shows the state of the screen frame when the vertical field of view of the finder screen is trimmed. FIG. 11 shows the state of the screen frame when the left and right visual fields of the finder screen are trimmed.

The viewfinder screen that can be observed through the eyepiece 7 is focused on the focusing screen 4 within the screen frame defined by the full-size mask 21, as shown in FIGS. 9, 10 and 11. The image is observed. At a substantially central portion of the focusing screen 4, there is provided, for example, a distance measuring frame 4a indicating a distance measuring range when automatic focusing is performed. The distance measuring frame 4a is a marking or the like on the focusing screen 4. It is formed so as to be easily visible.

Further, in the outside portion of the screen frame defined by the full-size mask 21, in-viewfinder display portions 51 and 52 are provided on the lower and side portions thereof. This is because the display light flux emitted from the finder display devices 8A and 8B forms the finder image inverting means 6 as described above.
5, the light is guided to the eyepiece 7 through the mirror 16, and the guided light flux is guided by the in-viewfinder display sections 51 and 52 and can be visually observed. It is like this.

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

In the state shown in FIG. 9, the upper and lower masks 22 and 23 and the left and right masks 24 and 25 are both retracted outside the screen frame of the full size mask 21. In the viewfinder screen observed by the eyepiece 7, a full-size screen frame defined by the full-size mask 21 is observed.

Further, the state shown in FIG. 10 is a trimming state in which the vertical field of view of the finder screen is trimmed by the upper and lower masks 22 and 23, and 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.

Therefore, the viewfinder screen observed by the eyepiece 7 has the 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 can be observed.

In the state shown in FIG. 11, the left and right masks 24, 25 are used to trim the visual field in the left-right direction of the finder screen, and the upper and lower masks 22, 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 the screen frame defined by the full-size mask 21 in the vertical direction and the left and right masks 24 in the horizontal direction.
The screen frame defined by 25 is observed.

FIGS. 12, 13 and 14 are views of the main part of the finder visual field switching mechanism 5 of the camera as seen from the side of the camera, and are diagrams for explaining the finder screen switching operation. 12 shows an initial state showing the full size of the viewfinder screen, FIG. 13 shows a trimming state in which the vertical field of view of the viewfinder screen is trimmed, and FIG. 14 shows the left and right sides of the viewfinder screen. In the trimming state in which the visual field in the direction is trimmed, the trimming masks 22b and 23b in the vertical direction are retracted, respectively.

The configuration around the switching lever 26 of the finder visual field switching mechanism 5 has been described with reference to FIG. 2 described above, and further, the configuration of detailed portions not shown in FIG. 2 described above. Will be described below.

As shown in FIGS. 12, 13 and 14, the operation knob portion 26b of the switching lever 26 has an arc shape, and pressing ends 26f and 26g are provided at the respective tip portions. The P switch 34 and the L switch 35 are located on the rotation circumference of the operation knob portion 26.
Each is fixed to a fixing member (not shown) in the camera body 1. The P switch 34 and L switch 35 are
Normally, it is in the OFF state, and the pressing end 2
It is turned on by being pressed by 6f and 26g.
It is in a state.

Further, as described above, the operation knob portion 2 is provided on the exterior member 38, which is the rear wall surface of the camera body 1.
A guide groove 38d is provided so that the knob portion of 6b protrudes to the outside of the camera body 1, and the knob portion of the operation knob portion 26b is arranged along this 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, on the inner wall surface of the exterior member 38, at a position opposed to the lower portion of the operation knob portion 26b of the switching lever 26, fixed in a shape along the shape of the operation knob portion 26b. A member is provided, and at least three V-shaped click grooves 38a, 38b, 38c are provided, and the operation knob portion 26b is configured to rotate along the fixing member. As described above, the hole 26e is arranged in the lower arm of the operation knob 26b of the switching lever 26, and the hole 26e is formed.
And the compression spring 37 and the ball 36, which are elastic members disposed inside, correspond to each other to form a click mechanism.

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

In the three click grooves 38a, 38b, 38c of the operation knob portion 26b, the click groove 38a at the center thereof is located at a position where the click stop is performed when the viewfinder screen is in a full size state. , The lower click groove 38b is clicked at a position where it is click-stopped when the viewfinder screen is vertically trimmed, and the upper click groove 38c is clicked when the viewfinder screen is horizontally trimmed. The corresponding positions are arranged at the stop positions.

On the other hand, the upper and lower masks 2 are given a turning force by the biasing force of the tension spring 27.
In a normal state, that is, in the retracted state, the reference numerals 2 and 23 make contact with the fixed pins 31 and 32 which are the fixed members and the retracted position restricting means arranged in the camera body 1. As a result, the upper and lower masks 22 and 23 are held in their retracted state.

Further, the left and right mask drive levers 28 are given a turning force by the urging force of the tension spring 29.
In a normal state, that is, in the retracted state, is abutted against the fixed pin 33, which is a fixed member and a retracted position restricting means disposed in the camera body 1,
This allows the left and right masks 24, 25 to be
Are held in their retracted state.

The operation of the viewfinder switching mechanism in the camera of the first embodiment having the above-described structure will be described below with reference to FIGS. 12, 13 and 14. 2,
In the state shown in FIG. 12, the viewfinder screen is in the initial state showing a full size, and the field of view of the viewfinder screen observed by the eyepiece lens 7 is in the state shown in FIG. In this initial state, the upper mask 22
The lower mask 23 and the left side mask 24 and the right side mask 25 are in a retracted state with respect to the focusing screen 4 which defines the field of view of the finder screen. Further, in this state, the ball 36 in the hole 26e of the operation knob portion 26b of the switching lever 26 is provided.
The initial state is maintained by being in the state of being inserted into the central click groove 38a of the exterior member 38. The pressing ends 26f and 26g of the operation knob portion 26b of the switching lever 26 are the P switches 34 and L, respectively.
The switch 35 is not pressed, and both are in the OFF state.

First, in the initial state shown in FIG. 12, when the knob portion of the operation knob portion 26b of the switching lever 26 is rotated in the direction of arrow P in FIG. 12, the switching lever 26 moves clockwise in FIG. 13, the ball 36 in the hole portion 26e of the operation knob portion 26b enters the lower click groove 38b and is held at the click stop position as shown in FIG.

Further, the pressing portion 26c of the switching lever 26
By pressing the operating arms 22e and 23e of the upper and lower masks 22 and 23 by the above, the bent portions 22c and 23 of the upper and lower masks 22 and 23 are pressed.
c is rotated in the direction in which the trimming mask portions 22b and 23b enter the viewfinder screen against the biasing force of the tension spring 27, and a trimming state is obtained in which the vertical field of view of the viewfinder screen is trimmed. .

The pressing end 2 of the operation knob portion 26b is then
By pressing the P switch 34 by 6f, the P switch 34 is turned on (ON), while the L switch 35 remains off (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, when the knob portion of the operation knob portion 26b of the switching lever 26 is rotated in the direction of arrow L in FIG.
12 rotates counterclockwise in FIG. 12, and as shown in FIG. 14, the ball 36 in the hole 26e of the operation knob portion 26b enters the click groove 38c on the upper side, whereby the click stop position is increased. Held in.

Further, the pressing portion 26d of the switching lever 26
By the operating arm 28 of the left and right mask drive lever 28.
When b is pressed, the operating arm 28b rotates clockwise in FIG. Then, as shown in FIG.
As described in (B), the engaging arms 28c of the left and right mask drive levers 28 resist the urging force of the tension spring 29, and in the direction of arrow L in FIG. 3B (clockwise in FIG. 14). ), The fork portion 24d rotates the bevel gear 24c on the left mask 24 side in the counterclockwise direction, and the trimming mask 24b on the left mask 24 side is trimmed in the left-right direction field of viewfinder screen. At the same time, the rotation operation of the left side mask 24 is transmitted to the right side mask 25 through the connecting gear portion 30 and is rotated in a direction to move the trimming mask portion 25b into the viewfinder screen. Then, the trimming mask portion 25b is brought into a trimming state in which the left and right directions of the finder screen are trimmed.
As a result, the trimming mask portions 24b and 25b are formed.
Is in a trimming state for trimming the horizontal field of view of the finder screen.

Then, the pressing end 2 of the operation knob portion 26b is
By pressing the L switch 35 by 6g, the L switch 35 is turned on (ON), while the P switch 34 remains off (OFF). At this time, the field of view of the finder screen observed by the eyepiece 7 is as shown in FIG.

The trimming state of trimming the vertical field of view of the finder screen (FIG. 13) to the trimming state of trimming the horizontal field of view (FIG. 1).
4) or when the trimming state for trimming the horizontal field of view of the finder screen (FIG. 14) is switched to the trimming state for trimming the vertical field of view (FIG. 13). In this case, the rotation operation of the switching lever 26 is always switched through the initial state (FIG. 12).

That is, when the trimming states are switched, the upper and lower masks 22 and 23 and the left and right masks 24 and 25 are used.
However, after the initial state, which is a retracted state in which all of them are retracted outside the viewfinder screen, switching to the next state is performed.

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

First, when a photograph is taken, as described above, the knob portion of the operation knob portion 26b of the switching lever 26 is operated to switch the viewfinder field switching mechanism 5 prior to taking the photograph. By performing the operation, 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 the operation of the switching lever 26.
The both switches 34 and 35 constitute the print size setting means 54, and the P switch 3 at this time.
4. The output signal from the L switch 35 is used to set the print size (aspect ratio of photo print) when finished as a photo print.

By operating a plurality of switch groups of the photographing mode setting means 55, desired photographing modes and the like, for example, various photographing modes or photographing conditions such as shutter speed and aperture value can be set. To do. The shooting conditions and the like set here are output to the CPU 50,
The information is transmitted to the corresponding drive circuits and the like arranged in the camera body 1 and displayed in the viewfinder by the viewfinder display means 62 including the viewfinder display devices 8A and 8B via the display drive circuit 61. To be 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 the shutter drive circuit 56 causes the shutter to be released. Drive 9 As a result, the surface of the film 10 is exposed.

Then, the film 1 by the shutter 9 is used.
When the exposure on the 0th surface is completed, the CPU 50 drives the film winding motor 58 via the motor drive circuit 57. Thereby, for example, the film winding operation to the next frame is started.

At the same time when the film winding operation is performed, the CPU 50 drives the magnetic head 11 via the magnetic head drive circuit 59, and various kinds of print size information and the like set by the print size setting means 54. The photographing information is recorded in the magnetic recording portion of the film 10, and the CPU 50 drives the LED 12 via the LED driving circuit 60 to obtain the print size information 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 film winding motor 58 completes the film winding operation for one frame, the CPU 50 stops the film winding motor 58 winding operation via the motor drive circuit 57. This completes a series of operations for taking a picture for one frame.

In this way, the photographing operation for each frame is repeated, and when the photographing of the final frame of the film 10 is completed, the CPU 50 starts the rewinding operation of the film 10 and the inside of the camera body 1 is started. The filmed film that has been rolled up is stored in the film cartridge.

The film cartridge containing the photographed film is taken out from the inside of the camera body 1 and then, in a normal case, for example, a photographic film developing process and a photographic printing process are carried out. ) Etc. will be requested for development processing and photographic print processing.

In the photographic developing station, first, the photographed film is developed and then the photographic print process is performed. At this time, as a printer or the like for performing photographic print processing, a printer having an information reading unit capable of reading photographing information such as print size information magnetically or optically recorded on the film 10 is used. I shall.

When a photographic print process is performed by the printer having the information reading means of the magnetic and optical recording portions on the film surface as described above, the inside of the camera body 1 is taken at the time of taking a photograph as described above. Magnetic head 11
The film 10 recorded by the LED 12 or the like.
The print size information or the like on the surface is read by the information reading means such as the printer for performing photographic printing, and the photographic print processing is performed on the basis of various photographing information read by the information reading means.

At the photographic developing station, the film which has been subjected to the development processing as described above and the photographic print or the like produced based on the film are returned to the client.

As described above, according to the camera of the first embodiment, the finder visual field switching mechanism 5 for selectively switching the visual field of the finder screen is provided. Trimming mask portions 22b and 23 for trimming the visual field
When the b, 24b, and 25b are in the retracted state, the extra space in the camera body 1 is effectively used, and the mechanism itself can be easily downsized.
Therefore, it is possible to contribute to downsizing of the camera having the finder visual field switching mechanism 5.

When the above trimming states are switched, the upper and lower masks 22 and 23 are used.
Since the left and right masks 24 and 25 are all returned to the initial state and then switched to the next state, when switching each trimming state,
Each trimming mask portion 22b, 23b, 24b, 25b
It is possible to prevent members such as the above from interfering with each other. Therefore, it is possible to realize the finder visual field switching mechanism 5 of the camera capable of selectively and surely performing the switching operation of the visual field of the finder screen surely and smoothly, and to provide the finder display device for displaying the photographing information in the finder. A camera can be provided.

FIGS. 15 and 16 are central longitudinal sectional views showing the essential parts of the finder optical system of the camera of the second embodiment of the present invention, as viewed from the rear of the camera. This second
The camera of the embodiment has basically the same configuration as the camera of the first embodiment, and only the arrangement of the finder display device 8C forming the in-finder display means 62 and the like is different. Therefore, the members described in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

FIG. 15 shows the finder screen in a full size state, that is, when the upper and lower masks and the left and right masks are both in the retracted state, or the view in the vertical direction of the finder screen. In the case of showing the trimming state after trimming, the left and right masks 43, 44 are shown in the retracted state. Further, FIG. 16 shows a case where the left and right visual fields of the finder screen are trimmed, that is, the left and right masks 43 and 44 are trimmed.

As shown in FIGS. 15 and 16, the full-size mask 41 constituting the finder visual field switching mechanism 5A is
Rays of light held by the focusing screen 4 and incident on the left end and the right end of the finder screen defined by the full size mask 41 are indicated by rays O10 and O11. In addition, a pair of second parts for trimming the horizontal field of view of the viewfinder screen.
Left mask 43 and right mask 44 which are masks of
Are rotatably provided on the respective shaft portions 43a and 44a, and by rotating the left and right masks 43 and 44, the trimming state and the retracted state can be selectively switched. There is. In the retracted state, the left and right masks 43, 44 are retracted outside the light rays O10, O11 at the left and right ends with the optical axis O1 as the center. The vertical trimming of the visual field, that is, the left and right masks 43 and 4 described above.
The light rays incident on the left end portion and the right end portion of the finder screen defined in the trimming state of No. 4 are shown by light rays O12 and O13 as shown in FIG.

Further, the right side mask 44 is provided with a display light beam transmission window 44b for transmitting the display light beam from the finder display device 8C in its retracted state,
The display light flux transmitting window 44b is provided in the full size mask 4
It is arranged so as to be retracted outside the screen frame of the finder screen defined by 1.

On the other hand, on the side of the viewfinder optical system, there is provided a viewfinder display device 8C for displaying on a side portion in the viewfinder.
Reference numeral C denotes a finder display light emitting portion 45 which is a display light emitting member for displaying various photographing information and the like outside the screen frame on the side of the finder screen, and guides the display light flux emitted from the finder display light emitting portion 45 into the finder screen. It is constituted by a display light guide prism 46 that emits light.

The display light guide prism 46 is provided with a reflecting surface 46a, and the display light flux emitted from the finder display light emitting section 45 is reflected by the reflecting surface 46a.
By reflecting on the roof mirror 42a of the roof roof mirror 42 located above the camera body, the light is guided to the eyepiece 7 through the reflecting surface 16a of the mirror 16.

At this time, the above-mentioned finder front light emitting section 45
Of the display light beam emitted from the upper end side light ray D5
And a range surrounded by the light beam D6 on the lower end side (see FIG.
5, the hatched portion in FIG. ) Indicates the display luminous flux displayed on the side of the finder screen.

Then, as shown in FIG. 15, in the initial state where the left and right masks 43 and 44 are retracted, the right mask 44 is a light beam which is a display light beam of the finder display device 8C. It is designed to be retracted outside the range of D5 and D6.
As shown in FIG. 16, the left and right masks 43,
When 44 is in the trimming state, the display light flux passes through the display light flux transmission window 44b and is guided into the eyepiece 7 through the roof roof mirror 42 and the mirror 16. .

The finder switching operation in the camera of the second embodiment constructed as described above will be described below. It should be noted that the description of the camera of the first embodiment described above is omitted because it is the same, and the camera of the second embodiment will be described only about the differences from the camera of the first embodiment described above. .

As shown in FIG. 15, from the initial state in which the left and right masks 43 and 44 are retracted, the finder visual field switching mechanism 5A is operated by operating the switching lever 26 described above, and FIG. As shown in FIG. 6, when the left and right fields of view of the finder screen are trimmed, the display light flux of the finder display device 8C is shielded by the right mask 44. The display luminous flux transmission window 44
b is provided, the display light flux passes through the display light flux transmission window 44b, and the roof roof mirror 42 and the mirror 16 as in the camera of the first embodiment.
The light is guided to the eyepiece lens 7 via, and the in-viewfinder display section 52 is displayed on the side of the viewfinder screen.

As described above, also in the second embodiment, the same effect as that in the first embodiment can be obtained, and the finder display device 8C is further devised so that the finder display device can be arranged. Display device 8
The arrangement can be such that C does not project to the side of the finder optical system. Therefore, it is possible to provide a camera including the finder visual field switching mechanism 5A and the finder display device 8C which are further downsized.

[Supplementary Notes] (1) In a single-lens reflex camera capable of setting the aspect ratio of a photographing screen and recording the aspect ratio information on a film, a focusing screen provided on the image forming surface of a finder image , A full-size mask provided near the focusing screen to indicate the full size of the finder screen, a pair of first masks for trimming the vertical direction of the finder screen, and a pair of second masks for trimming the horizontal direction of the finder screen. The mask, the switching means for selectively moving the first and second masks to the trimming state and the retracted state, and the finder display device for displaying photographing information in the finder. Rotates in the front-back direction of the focusing screen to retract, and the second mask moves the focusing screen. Retracted and rotated in the horizontal direction of the grayed screen, camera further first or second mask, in the retracted state that to be accommodated between the exit surface and the full-size mask of the finder display device.

(2) In a single-lens reflex camera capable of setting the aspect ratio of a photographing screen and recording this aspect ratio information on a film, a focusing screen provided on the image forming surface of the finder image, and the above focusing. A full-size mask provided near the screen to indicate the full size of the finder screen, a pair of first masks for trimming the vertical direction of the finder screen, and a pair of second masks for trimming the horizontal direction of the finder screen. A switching means for selectively moving the first and second masks to a trimming state and a retracted state, and a finder display device for displaying photographing information in the finder, the first mask being a focusing screen. Of the second mask is rotated and retracted, and the second mask is moved to the focusing screen. When the first or second mask is in the retracted state,
A camera adapted to be housed outside the display light flux of the finder display device.

(3) In the camera described in Supplementary Note 1 or 2, the first mask has a center of rotation above the focusing screen, and the second mask extends in the left-right direction of the focusing screen. A camera with a center of rotation.

(4) In a single-lens reflex camera capable of setting the aspect ratio of the photographing screen and recording the trimming information on the film, the focusing screen provided on the image plane of the finder image and the finder screen A first mask for moving the vertical direction to the full size and trimming position, a second mask for moving the horizontal direction of the viewfinder screen to the full size and trimming position, and the first and second masks selectively. A switching means for moving to a full size and trimming position, and a finder display device for displaying photographing information in the finder.
Alternatively, the second mask is a camera which is housed between the focusing screen and the finder display device in the full size position.

(5) In the camera described in appendix 4, the finder display device displays the photographing information outside the finder screen.

(6) In the camera described in Appendix 5, the first mask has a center of rotation above the focusing screen, and the second mask has a center of rotation in the left-right direction of the focusing screen. camera.

(7) In a single-lens reflex camera capable of setting the aspect ratio of a photographing screen and recording the aspect ratio information on a film, a focusing screen provided on the image forming surface of the finder image, and the focusing described above. A full-size mask provided near the screen to indicate the full size of the finder screen, a trimming mask for trimming a part of the finder screen, and a switching means for selectively moving the trimming mask between the trimming state and the retracted state. A camera having a finder display device for displaying shooting information in the finder, wherein the trimming mask is housed between the exit surface of the finder display device and the full size mask in the retracted state.

(8) In a single-lens reflex camera capable of setting the aspect ratio of a photographic screen and recording the aspect ratio information on a film, a focusing screen provided on the image plane of the finder image, and the focusing A full-size mask provided near the screen to indicate the full size of the finder screen, a trimming mask for trimming a part of the finder screen, and a switching means for selectively moving the trimming mask between the trimming state and the retracted state. A camera having a finder display device for displaying photographing information in the finder, wherein the trimming mask is housed outside the display light flux of the finder display device in the retracted state.

(9) In the camera described in Supplementary Note 7 or 8, the finder display device displays photographing information outside the finder screen.

[0123]

As described above, according to the present invention, the finder field of view can be switched by devising an evacuation space in the camera body for trimming the field of view in the vertical and horizontal directions of the finder screen. The mechanism is downsized, and by devising the layout of the finder display device so as not to interfere with the operating range of the finder field switching mechanism, a more downsized finder field switching mechanism and finder display device are provided. A camera can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a camera of a first embodiment of the present invention and is a schematic configuration diagram when viewed from the side of the camera.

2 is a perspective view of a main part showing a viewfinder field switching mechanism of the camera of FIG.

3 is a detailed view of a main part of an interlocking mechanism of a second mask (left and right masks) in the viewfinder visual field switching mechanism of the camera of FIG. 1 as viewed from the front side of the camera, 8A is a diagram showing a state where the left and right masks are retracted from the finder screen, and FIG. 9B is a diagram showing a trimming state in which the left and right directions of the finder screen are trimmed.

4 is a block diagram showing an electric circuit of the camera shown in FIG.

5 is a central vertical cross-sectional view showing a main part of the finder optical system of the camera of FIG. 1, showing both the upper and lower masks and the left and right masks, or the retracted state of the upper and lower masks.

6 is a central vertical cross-sectional view showing a main part of a finder optical system of the camera of FIG. 1, showing a trimming state of the upper and lower masks.

7 is a central longitudinal cross-sectional view showing a main part of the finder optical system of the camera of FIG. 1 as viewed from the rear, showing both the upper and lower masks and the left and right masks, or the left and right masks. FIG.

8 is a central longitudinal cross-sectional view showing a main part of the finder optical system of the camera shown in FIG. 1 as viewed from the rear, showing a trimming state of the left and right masks.

9 is a diagram showing a state of a finder screen in the camera of FIG. 1 and is a diagram showing a state of a screen frame showing a full size of the finder screen.

10 is a diagram showing a state of a finder screen in the camera shown in FIG. 1 and is a diagram showing a state of a screen frame when the up and down direction of the finder screen is trimmed.

11 is a diagram showing a state of a finder screen in the camera shown in FIG. 1 and is a diagram showing a state of a screen frame when the left and right directions of the finder screen are trimmed.

12 is a view of the main part of the viewfinder field switching mechanism of the camera of FIG. 1 as viewed from the side of the camera, illustrating the viewfinder screen switching operation, and showing the full size of the viewfinder screen. The figure which shows the initial state shown.

13 is a view of the main part of the viewfinder visual field switching mechanism of the camera of FIG. 1 as viewed from the side of the camera, illustrating the viewfinder screen switching operation, in which the vertical direction of the viewfinder screen is The figure which shows the trimmed trimming state.

14 is a view of the main part of the viewfinder field switching mechanism of the camera of FIG. 1 as viewed from the side of the camera, illustrating the viewfinder screen switching operation. In the trimmed trimmed state,
FIG. 6 is a diagram showing a retracted state in which a vertical trimming mask is retracted.

FIG. 15 is a central vertical cross-sectional view showing the main parts of the finder optical system of the camera of the second embodiment of the present invention, as viewed from the rear, in which both the upper and lower masks and the left and right masks, Alternatively, the figure does not show the retracted state of the left and right masks.

16 is a central longitudinal cross-sectional view showing a main part of the finder optical system of the camera shown in FIG. 15 as viewed from the rear, showing a trimming state of the left and right masks.

[Explanation of symbols]

1 ... Camera body 4 ... Focusing screen 5: Viewfinder field switching mechanism (switching means) 6 ... Finder image reversing means 8A, 8B, 8C ... Finder display device 11 ... Magnetic head (magnetic recording means) 12 ... LED (light emitting diode; optical recording means) 21, 41 ... Full size mask 22 ... Upper mask (first mask) 23 ... Lower mask (first mask) 24, 43 ... left mask (second mask) 25, 44 ... right mask (second mask) 26 ... Switching lever (switching means) 27 ... Extension spring (elastic member) 29 ... Extension spring (elastic member) 31, 32, 33 ... Fixing pin (withdrawal position regulating means)

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-3-287146 (JP, A) JP-A-6-194737 (JP, A) JP-A-6-35036 (JP, A) JP-A-7- 77731 (JP, A) JP 7-72531 (JP, A) JP 6-250264 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 13/00-13 / 28 G03B 17/18-17/20

Claims (3)

(57) [Claims] 1. A single-lens reflex camera capable of setting an aspect ratio of a photographing screen and recording the aspect ratio information on a film, a focusing screen provided on an image forming surface of a finder image, and the focusing screen. A full-size mask provided near the finder screen to indicate the full size of the finder screen, a trimming mask that enables a part of the finder screen to be trimmed, and a switching means that selectively moves the trimming mask between the trimming state and the retracted state. And a finder display device which is arranged in the vicinity of the focusing screen and which displays photographing information in the finder, and the trimming mask which is switched and moved by the switching means is the trimming mask of the finder display device in the trimming state. Enter the display light flux, and In the retracted state, it moves so as to be retracted and stored outside the display light flux of the finder display device, and the trimming mask has a display light flux transmission window for transmitting the display light flux of the finder display device in the trimming state. A camera characterized by being formed. 2. A single-lens reflex camera capable of setting an aspect ratio of a photographing screen and recording the aspect ratio information on a film, a focusing screen provided on an image forming surface of a finder image, and the focusing screen. And a pair of first masks that are provided in the vicinity of the finder screen and indicate the full size of the finder screen, and that are supported so as to be capable of trimming in the vertical direction of the finder screen and rotatable between the retracted position and the trimming position And a pair of second masks rotatably supported between a retracted position and a trimming position so that the left and right directions of the finder screen can be trimmed, and the first mask and the second mask, respectively. Switching means for selectively moving to the trimming position and the retracted position, the focusing screen, and the first and second A finder display device arranged between the masks and in the vicinity of the focusing screen for displaying photographing information in the finder, and the first mask and the second mask being switched and moved by the switching means. At least one of the masks enters the display light beam of the finder display device at the trimming position, and moves so as to be retracted and stored outside the display light beam of the finder display device in the retracted state, and the trimming is performed. A camera, wherein a mask is provided with a display light flux transmitting window for transmitting a display light flux of the finder display device when in the trimming state. 3. A single-lens reflex camera capable of setting an aspect ratio of a photographing screen and recording the aspect ratio information on a film, a focusing screen provided on an image forming surface of a finder image, and the focusing screen. A full-size mask provided near the finder screen to indicate the full size of the finder screen, a trimming mask that enables a part of the finder screen to be trimmed, and a switching means that selectively moves the trimming mask between the trimming state and the retracted state. And a finder display device arranged near the focusing screen for displaying photographing information in the finder, and the trimming mask switched and moved by the switching means is the display light in the trimming state.
It has a display light flux transmission window that transmits the bundle,
Is retracted outside the display light flux of the viewfinder display device
When it is stored and enters the optical path of the display light beam of the finder display device during the switching from the retracted state to the trimming state, and further reaches the trimming state, a part of the finder screen is trimmed and
A camera, wherein the display light flux is transmitted through a display light flux transmission window .