JP2008107456A - Single lens reflex camera with camera shake correcting function, camera with camera shake correcting function and interchangeable lens barrel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a single lens reflex camera with a camera shake correcting function capable of reducing the possibility that a gyro sensor for detecting camera shake of the camera erroneously detects vibration caused by the movement of a movable member in the camera, a camera with a camera shake correcting function and an interchangeable lens barrel. <P>SOLUTION: The gyro sensors S1 and S2 detecting the camera shake of a camera body 11 are provided in one end 14 in a width direction of the camera body 11, and an imaging device 20 relatively moving to the camera body so as to negate the camera shake detected by the gyro sensors is provided near the center part in the width direction in the camera body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a single-lens reflex camera with a camera shake correction function, a camera with a camera shake correction function, and an interchangeable lens barrel that can be attached to and detached from a camera body with a camera shake correction function.

The camera with a camera shake correction function includes a gyro sensor for detecting camera shake in the X direction and the Y direction of the camera.
Conventionally, a single-lens reflex camera with a camera shake correction function is provided with a rotating mirror and shutter for the viewfinder, which is a movable member that moves in conjunction with the movement of the shutter button, in the camera body. In addition, a gyro sensor was provided on the camera body.
Further, in the type of camera that moves the correction lens in the lens barrel in the X direction and the Y direction, a gyro sensor is provided in the lens barrel.
Japanese Patent Laid-Open No. 5-107623

  However, in a conventional single-lens reflex camera with a camera shake correction function, vibration caused by the movement of a movable member (rotating mirror, shutter, image sensor, etc.) in the camera body is easily transmitted to the gyro sensor. For this reason, the gyro sensor detects not only camera shake of the camera body but also this vibration, and as a result, accurate camera shake correction operation may not be performed.

  In addition, in a lens barrel that incorporates a correction lens and a gyro sensor, vibration due to the movement of the correction lens is easily transmitted to the gyro sensor, so that an accurate camera shake correction operation may not be performed.

  An object of the present invention is to provide a camera with a single-lens reflex camera shake correction function capable of reducing the possibility that a gyro sensor that detects camera shake will erroneously detect vibration caused by the movement of a movable member in the camera, The object is to provide a camera with a camera shake correction function and an interchangeable lens barrel.

  According to the first aspect of the camera with a single-lens reflex camera shake correction function of the present invention, the shutter and the finder rotating mirror that move in conjunction with the movement of the shutter button are arranged at the center or in the vicinity of the center in the width direction of the camera. A camera body built into the camera body, a lens barrel that is attached to and detached from the camera body, a gyro sensor that detects a camera shake of the camera body provided at an end in a width direction of the camera body, and a camera shake detected by the gyro sensor And a camera shake correction mechanism having a movable imaging element built in the central part of the camera body in the width direction or in the vicinity of the central part, or a movable correction lens built in the lens barrel. It is characterized by that.

  In this aspect, it is preferable that a grip portion is provided at one end in the width direction of the camera body, and the gyro sensor is provided in the grip portion.

  According to the second aspect of the camera with a single-lens reflex camera shake correction function of the present invention, the shutter and the finder rotating mirror that move in conjunction with the movement of the shutter button are arranged at the center or the center in the height direction of the camera. A camera body built in the vicinity, a lens barrel attached to and detached from the camera body, a gyro sensor for detecting camera shake of the camera body provided at an end in the height direction of the camera body, and the gyro sensor detecting A camera-shake correction mechanism having a movable image sensor built in the central part of the camera body in the height direction or in the vicinity of the central part, or a movable correction lens built in the lens barrel. It is characterized by providing.

  According to the third aspect of the camera with a single-lens reflex camera shake correction function of the present invention, a camera body including a shutter that moves in conjunction with the movement of the shutter button and a finder rotating mirror, and is attached to and detached from the camera body. In a single-lens reflex camera provided with a lens barrel, an imaging element that includes a gyro sensor that detects camera shake of the lens barrel in the lens barrel and is movable in the camera body so as to cancel camera shake detected by the gyro sensor It is characterized by providing.

  A camera with a camera shake correction function according to the present invention includes a camera body and a camera with a camera shake correction function including a lens barrel that is attached to and detached from the camera body, and a gyro sensor that detects camera shake in the camera body or the lens barrel. When the gyro sensor is provided in the lens barrel, an image sensor that is movable so as to cancel the camera shake detected by the gyro sensor is provided in the camera body, and when the gyro sensor is provided in the camera body, The lens barrel is provided with a correction lens that is movable so as to cancel the camera shake detected by the gyro sensor.

  The interchangeable lens barrel of the present invention includes a gyro sensor that detects camera shake, and is detachable from a camera body that includes an image sensor that moves so as to cancel camera shake detected by the gyro sensor.

When the gyro sensor is provided in the camera body including the movable member (in the case of claim 4, the image pickup device is also provided) such as a rotating mirror and a shutter as in the first to fourth aspects, the movable member is the center in the width direction of the camera body. If the gyro sensor is provided in the end of the camera body in the width direction or height direction (for example, grip part) away from the movable member, it is movable. The distance between the member and the gyro sensor is longer than in the prior art. For this reason, the possibility that the gyro sensor erroneously detects the vibration caused by the movement of the movable member is reduced, so that an accurate camera shake correction operation can be realized as compared with the conventional art.
Further, in the first to third aspects, when the movable correction lens is provided in the lens barrel, the vibration of the lens barrel caused by the movement of the correction lens is difficult to be transmitted to the camera body. However, there is little risk of erroneously detecting vibration caused by the movement of the correction lens. Accordingly, it is possible to realize a camera shake correction operation that is more accurate than in the past.

  Further, when a gyro sensor is provided in one of the camera body and the lens barrel and a movable image sensor or correction lens is provided in the other as in claims 5 and 6, the image sensor or correction that is a movable member is also provided. Since the possibility that the gyro sensor erroneously detects vibration caused by the movement of the lens is low, an accurate camera shake correction operation can be realized as compared with the conventional art.

First, a first embodiment of the present invention will be described with reference to FIGS. As shown by the arrows in FIG. 1, in the following description, the left-right direction of the camera with camera shake correction function 10 is the X direction, and the vertical direction of the camera with camera shake correction function 10 is the Y direction.
As shown in FIG. 1, the camera with a camera shake correction function 10 is a single-lens reflex camera, and includes a camera body 11 and a lens barrel 30. A circular body-side mount 13 is provided slightly on the right side of the front center portion of the camera body 11, and a lens-side mount 31 detachably attached to the body-side mount 13 is provided at the rear end portion of the lens barrel 30. . Further, a grip portion 14 is formed at the left end portion of the camera body 11.

  A mirror box 15 is fixed inside the camera body 11 so as to be positioned immediately after the body side mount 13. The mirror box 15 includes a mirror (movable member) 16 that is rotatable about a left-right axis. The mirror 16 is a reflection position (position indicated by a one-dot chain line in FIG. 3) located on the optical axis O (see FIG. 3) of the lens in the lens barrel 30, and rotates upward from the reflection position and retracts from the lens optical axis O. It can be rotated between the retracted position (the position indicated by the phantom line in FIG. 3). As shown in FIG. 3, a finder prism (finder) 17 is provided at the upper end of the camera body 11 so as to be positioned immediately above the mirror box 15, and the finder prism 17 is provided at the rear upper end of the camera body 11. A finder window (finder) 18 is provided in a mode that is located immediately after. When the shutter button B (see FIGS. 1 and 2) provided on the camera body 11 is not pressed, the mirror 16 is positioned at the reflection position, so that the subject image transmitted through the lens of the lens barrel 30 is used for the viewfinder by the mirror 16. Since the light is reflected toward the prism 17 and passes through the finder prism 17 toward the finder window 18, the photographer can visually recognize the subject through the finder window 18. On the other hand, when the shutter button B of the camera body 11 is pressed, the mirror 16 rotates to the retracted position, so that the image sensor 20 can image the subject.

Immediately after the mirror box 15 inside the camera body 11, a shutter (movable member) 19 that opens in conjunction with the pushing operation of the shutter button B is provided.
Further, a stage plate (camera shake correction mechanism) 21 having an image sensor (camera shake correction mechanism) 20 is disposed in the center of the front surface of the camera body 11 in a mode that is located immediately after the shutter 19. This stage plate 21 (image sensor 20) is slidable in the X and Y directions from the initial position in FIG. 1 (position where the center point of the image sensor 20 overlaps the lens optical axis O). Further, although not shown, the stage plate 21 is provided with a coil, and a magnet that exerts a magnetic force on the coil is provided in the vicinity of the stage plate 21, and this coil and magnet drive the stage plate 21. Configure the device.

As shown in FIG. 1, a gyro substrate 22 is fixed to the inner surface of the grip portion 14 of the camera body 11, and a first gyro sensor S 1 and a second gyro sensor S 2 are fixed to the front surface of the gyro substrate 22. is there. The first gyro sensor S1 detects this angular velocity when the camera body 11 rotates about the X axis (not shown), and the second gyro sensor S2 rotates the camera body 11 about the Y axis (not shown). This angular velocity is detected when
Inside the camera body 11, there is provided control means C that is electrically connected to the first gyro sensor S <b> 1 and the second gyro sensor S <b> 2 and electrically connected to the coil provided on the stage plate 21.
Therefore, when camera shake occurs in the camera body 11, the control means C calculates camera shake (amount) in the X direction and Y direction of the camera body 11 based on the angular velocities detected by the first gyro sensor S1 and the second gyro sensor S2. Further, a current flows from the control means C to the coil. Then, driving forces in the X direction and the Y direction are generated in the coil, and the image pickup device 20 and the stage plate 21 slide in the X direction and the Y direction so as to cancel out the shaking (amount) by the driving force, so that the shaking is corrected.

  The camera with a camera shake correction function 10 of the present embodiment configured as described above has a mirror box 15 (mirror 16), which is a movable member, a shutter 19, and an imaging device slightly on the right side (near the center) of the camera body 11 in the width direction. Since the element 20 and the stage plate 21 are provided, and the first gyro sensor S1 and the second gyro sensor S2 are provided in the grip portion 14 which is the left end portion of the camera body 11, the mirror box 15 (mirror 16), the shutter 19, Compared to the case where the image sensor 20, the stage plate 21, the first gyro sensor S <b> 1, and the second gyro sensor S <b> 2 are disposed in the same part in the camera body 11 (for example, the center part of the camera body 11), the mirror box 15 (mirror 16), shutter 19, image sensor 20, stage plate 21, first gyro sensor S1, and second gyroscope. Distance of the service S2 is longer. Therefore, even if the camera body 11 is vibrated due to the operations of the mirror box 15 (mirror 16), the shutter 19, the image pickup device 20, and the stage plate 21, which are movable members, this vibration is caused by the first gyro sensor S1 and the first gyro sensor S1. 2 is not transmitted to the gyro sensor S2, or is significantly attenuated and then transmitted to the first gyro sensor S1 and the second gyro sensor S2, so that the first gyro sensor S1 and the second gyro sensor S2 are the mirror box 15 (mirror 16) and the shutter. 19. The risk of erroneously detecting vibration caused by the operations of the image sensor 20 and the stage plate 21 is small. Therefore, it is possible to realize a camera shake correction operation that is more accurate than in the past.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof is omitted.
The feature of this embodiment is that the first gyro sensor S1 and the second gyro sensor S2 are provided in the lens barrel 30 without being provided in the camera body 11. That is, as shown in FIGS. 4 and 5, a first substrate 32 parallel to the X direction and a second substrate 33 parallel to the Y direction are disposed near the rear end portion of the inner peripheral surface of the lens barrel 30. The bolts 35 are fixed to each other. Further, a first gyro sensor S1 for detecting the angular velocity when the lens barrel 30 rotates around the X axis (not shown) is fixed to the first substrate 32, and the lens barrel is fixed to the second substrate 33. A second gyro sensor S2 for detecting the angular velocity when the 30 rotates around the Y axis (not shown) is fixed.
When the lens barrel 30 is connected to the camera body 11, the lens-side mount 31 of the lens barrel 30 and the conductive pins provided on the body-side mount 13 of the camera body 11 come into contact with each other, and the lens barrel 30 is interposed via the conductive pins. The first gyro sensor S1 and the second gyro sensor S2 are electrically connected to the control means C of the camera body 11. Accordingly, when a camera shake occurs in the camera with a camera shake correction function 10, the camera shake is corrected in the same manner as in the first embodiment.

  In the second embodiment described above, the vibration generated in the camera body 11 due to the operations of the mirror box 15 (mirror 16), which is a movable member, the shutter 19, the image sensor 20, and the stage plate 21, 13 and the lens side mount 31, the vibration is greatly attenuated, so that this vibration is not transmitted to the lens barrel 30 or is transmitted in a considerably attenuated state. Therefore, also in the present embodiment, the first gyro sensor S1 and the second gyro sensor S2 are caused by the operations of the mirror box 15 (mirror 16), which is a movable member of the camera body 11, the shutter 19, the image sensor 20, and the stage plate 21. There is little risk of detecting vibrations by mistake. Accordingly, it is possible to realize a camera shake correction operation that is more accurate than in the past.

  4 and 5, the first gyro sensor S1 and the second gyro sensor S2 are provided in the vicinity of the lens-side mount 31 of the lens barrel 30, but the first gyro sensor S1 and the second gyro sensor S2 are provided as lens mirrors. If the vibration of the camera body 11 is less likely to be transmitted by the first gyro sensor S1 and the second gyro sensor S2 in the other place (for example, the front end portion) of the tube 30, the first gyro sensor is placed in such a place. More preferably, S1 and the second gyro sensor S2 are provided.

Although the present invention has been described using the first and second embodiments, the present invention is not limited to these embodiments, and can be implemented with various modifications.
For example, the mirror box 15 (mirror 16), the shutter 19, the image sensor 20, and the stage plate 21 are arranged slightly on the right side of the central portion in the width direction of the camera body 11, but these are arranged in the central portion in the width direction of the camera body 11. It may be provided or arranged on the right side of the first embodiment.
Further, the grip portion 14 is provided at the right end portion of the camera body 11 (the first gyro sensor S1 and the second gyro sensor S2 are provided in the grip portion 14), the mirror box 15 (mirror 16), the shutter 19, and the image sensor 20. In addition, the stage plate 21 may be disposed at the center in the width direction of the camera body 11 or on the left side of the center. Further, the first gyro sensor S1 and the second gyro sensor S2 may be provided in any end portion in the width direction of the camera body 11 without forming the grip portion 14 in the camera body 11.
In addition, a first gyro sensor S 1 and a second gyro sensor S 2 are provided at the upper end of the camera body 11, and movable members (mirror 16, shutter 19, image sensor 20 and stage plate 21) are arranged in the height direction of the camera body 11. A first gyro sensor S1 and a second gyro sensor S2 are provided at the center (or near the center) or below the center, or at the lower end of the camera body 11, and these movable members are arranged at the height of the camera body 11. You may implement by providing in the center part of a direction, or an upper side from a center part.

Furthermore, the present invention can also be applied to a type of camera that is not a single-lens reflex camera.
In the first embodiment, the image sensor 20 and the stage plate 21 are omitted, and a movable correction lens (not shown; camera shake correction mechanism) for correcting camera shake is provided in the lens barrel 30 instead. Also good.
Further, as a sensor for detecting camera shake, a biaxial gyro sensor capable of simultaneously detecting camera shake in the X direction and the Y direction may be used instead of the first gyro sensor S1 and the second gyro sensor S2.

It is a front view of the camera body of a 1st embodiment of the present invention. It is a top view of a camera. It is a right view of a camera body. It is the perspective view seen from the front of the exchangeable lens barrel of the 2nd Embodiment of this invention. It is the perspective view which looked at the interchangeable lens-barrel from the back, abbreviate | omitting and showing the lens side mount.

Explanation of symbols

10 Camera with camera shake correction function 11 Camera body 13 Body side mount 14 Grip part 15 Mirror box 16 Mirror (movable member)
17 Viewfinder prism (finder)
18 Viewfinder window (finder)
19 Shutter (movable member)
20 Image sensor (camera shake correction mechanism)
21 Stage plate (camera shake correction mechanism)
22 Gyro substrate 30 Lens barrel 31 Lens side mount 32 First support plate 33 Second support plate 34 35 Bolt B Shutter button C Control means O Lens optical axis S1 First gyro sensor S2 Second gyro sensor

Claims (6)

A camera body that houses a shutter and a finder rotating mirror that moves in conjunction with the movement of the shutter button at or near the center of its width direction,
A lens barrel attached to and detached from the camera body;
A gyro sensor for detecting camera shake of the camera body provided at an end in the width direction of the camera body;
A movable image pickup device built in the central portion of the camera body in the width direction or in the vicinity of the central portion or movable correction lens built in the lens barrel is movable so as to cancel the camera shake detected by the gyro sensor. An image stabilization mechanism;
A camera with a single-lens reflex camera shake correction function. The camera with a camera shake correction function according to claim 1,
A camera with a single-lens reflex camera shake correction function, wherein a grip portion is provided at one end in the width direction of the camera body, and the gyro sensor is provided in the grip portion. A camera body that incorporates a shutter and a finder rotating mirror that moves in conjunction with the movement of the shutter button at or near the center of its own height direction;
A lens barrel attached to and detached from the camera body;
A gyro sensor for detecting a camera shake of the camera body provided at an end in a height direction of the camera body;
A movable correction element incorporated in the central part of the camera body in the height direction or in the vicinity of the central part, or a movable correction lens incorporated in the lens barrel, which is movable so as to cancel the camera shake detected by the gyro sensor. A camera shake correction mechanism,
A camera with a single-lens reflex camera shake correction function. In a single-lens reflex camera including a camera body including a shutter that moves in conjunction with the movement of the shutter button and a rotating mirror for a finder, and a lens barrel that is attached to and detached from the camera body,
The lens barrel is provided with a gyro sensor for detecting camera shake of the lens barrel,
A camera with a single-lens reflex camera shake correction function, wherein the camera body is provided with an image sensor that can move so as to cancel the camera shake detected by the gyro sensor. In a camera with a camera shake correction function including a camera body and a lens barrel that is attached to and detached from the camera body,
A gyro sensor for detecting camera shake is provided on the camera body or the lens barrel.
When the gyro sensor is provided in the lens barrel, an image sensor that is movable so as to cancel the camera shake detected by the gyro sensor is provided in the camera body, and when the gyro sensor is provided in the camera body, the gyro sensor A camera with a camera shake correction function, wherein a correction lens that is movable so as to cancel the camera shake detected by the camera is provided in the lens barrel. An interchangeable lens barrel comprising a gyro sensor that detects camera shake and detachable from a camera body that includes an image sensor that moves so as to cancel camera shake detected by the gyro sensor.

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