JPH07219005A - Panorama switching device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a panorama switching device with high shutter efficiency, good operability, and that does not hinder the compactness of the camera body. In a panorama switching device built in a single-lens reflex camera, a pair of light shields is disposed between a shutter 1b and a camera body 5 and is slidably supported on a side surface of a shutter blade chamber. A member, an operation member 11 that operates the light blocking member to switch between full-size shooting and panoramic shooting, and connecting means 15 and 16 that interlock the operation member and the light blocking member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device capable of switching between full size and panoramic size by an operating member incorporated in a camera body.

[0002]

2. Description of the Related Art In a conventional panorama size switching apparatus in an SLR, a plane parallel to a plane having an exposure opening is provided between a camera body and a cover plate forming a blade chamber in which a shutter blade of a shutter travels. It is known that a movable light-shielding member is provided to switch between full-size shooting and panoramic shooting.

This panorama size switching device achieves its purpose by extending an arm between the space in which the shutter blades travel and the main body for operating and supporting the light shielding member.

[0004]

In the prior art as described above, there is a fate that the distance between the film surface and the shutter curtain must be as narrow as possible in order to improve the shutter efficiency. hand,
There is a problem that the extended arm goes against the fate in order to secure the space where it is arranged.

Further, when trying to enable panorama switching from the outside of the camera body, it is difficult to link the external switching operation member and the light shielding member. There was also a problem that it was difficult to secure the interlocking space when trying to make the compact. The present invention has been made in view of such conventional problems,
An object of the invention is to provide a panorama switching device that has high shutter efficiency, good operability, and that does not hinder the compactness of the camera body.

[0006]

To achieve the above object, according to the present invention, in a panorama switching device incorporated in a single-lens reflex camera, a light-shielding portion is arranged between a shutter and a camera body, and a shutter blade chamber side surface. A pair of light-shielding members slidably supported on the section, an operation member for operating the light-shielding member to switch between full-size photography and panoramic photography, and a connecting means for interlocking the operation member and the light-shielding member. The first means for solving the problem is to have Further, at least a part of the operating member is disposed on the inner side surface of the mirror box, which is a means for solving the second problem, and the operating portion of the operating member is disposed in the front portion of the mirror box, and the lens barrel A third means for solving the problem is to operate from the outside in a state in which the operation member, the light shielding member, and the connecting means are integrally incorporated in the mirror box. Is printed.

[0007]

In the present invention, since the slide receiving portion of the movable light shielding member is provided on the side surface of the shutter, only the light shielding portion is arranged between the shutter and the camera body. It suffices to consider only the thickness of the light shielding portion, and the shutter efficiency can be improved as compared with the conventional technique.

Further, since the panorama size switching operation member is provided integrally with the mirror box by taking advantage of the characteristics of the single-lens reflex camera, it is possible to interlock with the light shielding member within the same group, and the number of parts is small. You can switch smoothly. Furthermore, the assembly process can be facilitated.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a horizontal sectional view on the optical axis of a camera body incorporating the panorama switching device of the present invention. Figure 1
In the figure, 1 is a mirror box, which includes a mirror box portion 1a in which a movable mirror is disposed, a shutter substrate portion 1b,
It is composed of a mount portion 1C to which a bayonet mount 2 to which a taking lens is attached is fixed.

A lens positioning pin 3 determines a fixed position when the taking lens is mounted on the bayonet mount 2. Reference numeral 4 is a button for retracting the lens positioning pin 3 when attaching and detaching the taking lens. Reference numeral 5 denotes a camera body, which integrally fixes the mirror box 1 and has a photographing screen frame 5a at a substantially central portion thereof. Reference numeral 6 denotes a back cover, one end of which is supported by the side surface of the camera body body 5 and is arranged on the back side of the camera body body 5 so as to be openable and closable. A pressure plate 7 is disposed on the inner surface of the back cover 6 to determine the film position.

Here, the difference between full-size photography and panoramic photography will be described. For full size shooting, the shooting screen size is vertical 2
4 x width 36, while panoramic shooting is height 13 x width 3
It is set to about 6. Therefore, when switching to panoramic size shooting, the objective can be achieved by covering the vertical direction of the screen size of full size shooting with a light shielding plate.

FIG. 3 is a front view of the camera body 5 when the mirror box is removed in order to easily understand the switching of the light shielding plate. In FIG. 3, 8
Is an upper light shielding plate for forming a panoramic screen, and 9 is a lower light shielding plate. It should be noted that this drawing is used for convenience of description, and in the present embodiment, since the light shielding plates 8 and 9 are incorporated in the mirror box side, they are not actually shown as a single product as in this drawing.

The full-size photographing screen frame 5a has an opening of 24 × 36, and the upper and lower light shielding plates 8 and 9 are the full-size photographing screen frame during normal photographing (full-size photographing). It is retreating from 5a. When switching to panoramic shooting, the upper and lower shading plates 8 and 9 shield the screen to form a panoramic shooting screen frame 5b as shown in the figure. As shown in FIG. 1, the upper and lower light-shielding plates 8 and 9 are arranged between the photographing opening (full-size photographing screen frame 5a) of the camera body and the shutter, and the supporting portion thereof is the shutter substrate 1b. It is installed on the side of the machine so that it can slide up and down. This shading plate 8,
The screen size is switched by vertically moving 9 by an operation member described later. The lever 11 is an external operation member for performing this switching from the outside of the camera body. The lever 11 is rotatably fitted on the side surface 1d of the mirror box, and the light shielding plate is operated by rotating a predetermined angle. A cam plate 12 and a click spring 13 are fixed to one end of the lever 11 with screws 14. Connection levers 15 and 16 are arranged between the cam 12 and the light shielding plates 8 and 9, and are rotatably supported about a shaft 17 as a coaxial shaft. When the lever 11 is rotated, the connecting lever is rotated between the bottom dead center and the top dead center of the cam plate to move the light shielding plate up and down.

FIG. 2 is a view for explaining the arrangement position of the lever 11 on the outside, showing the front of the mirror box and showing the state when the taking lens is removed.
Also, the figure does not show the bayonet mount. Since the lever 11 is disposed in the front part on the rewinding side inside the mirror box, it is operated by removing the lens barrel.

In the illustrated state, the operating portion 11a of the lever 11 is shown.
Is down and is in the full size shooting position. By rotating the operation unit 11a upward, switching to panoramic size photography is performed. Next, the switching operation in this embodiment will be described. FIG. 4 is a vertical cross-sectional view showing a photographing size switching mechanism arranged on the side surface of the mirror box on the rewinding side, and this drawing shows a full size state.

The operating portion 11a of the lever 11 is at the lowermost end. The cam plate 12 has two cam portions 12a and 12b.
At the top dead center of the cam plate, the upper and lower light-shielding plates 8 and 9 are connected via the connecting levers 15 and 16 to the two elongated holes 8a formed in the upper light-shielding plate and the lower light-shielding plate. Shutter substrate portion 1b fitted in two elongated holes 9a formed in the light shielding plate 9 of
The shutter base plate 1 is provided by the engagement pin 10 implanted in
It is slid along the side surface of b and retracted to the full size position. Further, the click plate 13 integrated with the cam plate 12 is fixed to one end of the operation member. Also, click plate 13
Is composed of a click portion 13a and a contact piece portion 13b. The click portion 13a is depressed into the groove portions 1e and 1f provided on the side surface of the mirror box, so that the full size photographing position and the panoramic photographing position are clicked. The setting is made by generating force. In this figure, it falls into the groove at the full-size shooting position. Further, the contact piece portion 13b slides on the printed circuit board 18, and by this slide, panorama size photography, full size photography, and switching warning display during switching are performed.

The printed circuit board 18 has three terminals 18a, b,
c is provided, 18a and b are ON during full size shooting,
18b and c are turned on during panorama size photography, and all terminals are turned off during switching. FIG. 5 is a vertical cross-sectional view showing the switching mechanism at the time of panorama size photography. In FIG. 5, the operation unit 11a is at the uppermost end. The connecting levers 15 and 16 are located at the bottom dead center of the cam plate 12, and the upper and lower light shielding plates 8 and 9 shield the full-size photographing screen frame 5a from light. At this time, the upper and lower light shielding plates 8 and 9 are actuated by a spring 19 which is hung on the upper and lower light shielding plates 8 and 9. Therefore, the cam plate 1
The connecting levers 15 and 1 by the two cam portions 12a and 12b.
While biasing the spring 19 via 6, the upper and lower light shielding plates 8,
By retracting 9, the full-size shooting screen frame 5a
To the bottom dead center of the cam plate 12 and the spring 1
By being returned by 9, the upper and lower light shielding plates are operated to a predetermined light shielding position to switch to the panoramic photographing screen frame 5b.

Next, with reference to FIGS. 6 and 7, an embodiment of panoramic shooting, full size shooting, and halfway warning display will be described. FIG. 6 is a vertical sectional view on the optical axis for showing the position of the display body of the present invention. 1 is a mirror box. Reference numeral 20 is a movable mirror, and 21 is a sub-mirror, and the photographing light is moved by the movable mirror 20.
The light is guided to the finder optical system. Reference numeral 22 is a screen, and 23 is a display body for integrally displaying in the finder. The display body in this embodiment uses a variable transmittance display element (EC, liquid crystal) for performing a positive display in which an opaque pattern is displayed on a transparent background. 24 is a penta prism, 25 is an eyepiece lens,
The above finder optical members are integrally incorporated in the prism box 26 to form a finder optical system.

FIG. 7 is a diagram showing a display content and a display drive block diagram. In FIG. 7, when the switching mechanism described above is switched to full-size shooting and panoramic shooting, the position detection unit detects SW1. At the full size position, the signal from the A terminal is input to the MCU and full size detection is performed. Further, when switching to the panorama size, the signal from the B terminal is input to the MCU and panorama detection is performed. Further, since the signals of both terminals are not input during the process, the warning process is performed by the MCU.

The contents displayed in the finder are shown in the upper part of FIG. The left side shows the viewfinder field condition during full-size shooting. The right side is a viewfinder field state at the time of panoramic shooting, and light is shielded according to the panoramic shooting screen frame 5a. In the middle of switching, the light-shielding portion on the right side blinks to warn that normal switching is not being performed.

In the present embodiment, the entire outside of the panoramic field of view is shielded from light, but the shape may be any shape as long as it is a pattern showing the field of view. Further, in this embodiment, the superimposed display is adopted by using the variable transmittance type display element. However, in the case of a panoramic field frame in which only engraved lines are arranged on a normal screen, an LED or the like is provided outside the field of view. The display contents such as LED lighting at the time of panoramic shooting and blinking warning at the time of halfway switching may be used.

In the present embodiment, the phase detection member is provided on the cam 12 that is integrally fixed to the operation member to identify the size switching position, but the location of the detection member is not limited to this. Absent. For example, a detection member may be provided on the light shielding plate so that the positions of the upper and lower light shielding plates 8 and 9 that determine the screen size can be directly detected. Although the phase detection is performed by the slide contact piece as the detection member, the position may be directly detected photoelectrically.

[0023]

As described above, in the present invention, the light shielding member is provided between the shutter and the camera body, and the other portion is provided so as to be slidably supported on the side surface of the shutter blade chamber. By operating the light-shielding member, full-size shooting and panoramic shooting are possible, so only the light-shielding portion is arranged between the shutter and the camera body. It suffices to give consideration to the effect that the shutter efficiency can be improved as compared with the conventional technique.

At least a part of the operating member is disposed on the inner surface of the mirror box, and the operating portion is disposed in the front portion of the mirror box so that the lens barrel is detached from the outside. Further, since the operation member, the light blocking member, and the connecting means are integrally incorporated in the mirror box, the light blocking member can be interlocked with each other within the same group, and the number of parts is small and smooth switching can be performed. effective. Further, there is also an effect that the assembling process can be facilitated.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view on an optical axis of a camera body in which a panorama switching device of the present invention is incorporated.

FIG. 2 is a diagram for explaining a disposition position of a lever 11 on the outside.

FIG. 3 is a diagram for easily explaining switching of a light shielding plate.

FIG. 4 is a vertical cross-sectional view showing a photographing size switching mechanism provided on the side surface of the mirror box on the rewinding side.

FIG. 5 is a vertical cross-sectional view showing a switching mechanism during panorama size photography.

FIG. 6 is a vertical cross-sectional view on the optical axis for showing the position of the display body of the present invention.

FIG. 7 is a diagram showing a display content and a display drive block diagram.

[Explanation of symbols]

 1 mirror box 1a mirror box part 1b shutter substrate part 1c mount part 1d mirror box side face 1e groove part 1f groove part 2 bayonet mount 5 camera body body 5a shooting screen frame 5b panoramic shooting screen frame 8 upper light shield plate 9 lower light shield plate 10 engagement Pin 11 Lever 12 Cam plate 13 Click plate 13a Click part 13b Contact piece part 15 Connection lever 16 Connection lever 17 Shaft 18 Printed circuit board 19 Spring

Claims (4)

[Claims] 1. A panorama switching device incorporated in a single-lens reflex camera, wherein a light-shielding portion is arranged between a shutter and a camera body, and a pair of light-shielding members slidably supported on side surfaces of the shutter blade chamber. An operation member that operates the light blocking member to switch between full-size shooting and panoramic shooting, and a connecting unit that links the operation member and the light blocking member.
A panorama switching device having: 2. The at least part of the operating member is disposed on the inner surface of the mirror box.
The panorama switching device described. 3. The panorama switching device according to claim 1, wherein the operation portion of the operation member is arranged at a front portion of the mirror box and is operated from the outside with the lens barrel removed. 4. The panorama switching device according to claim 1, wherein the operation member, the light blocking member, and the connecting means are integrally incorporated in a mirror box.