JPH051670B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a photographing device such as a video camera.

BACKGROUND TECHNOLOGY With the spread of video tape recorders in recent years, there are many opportunities to use video cameras to take pictures, and there is a demand for a video camera that can perform stable camera work with less image blur without using a tripod. There is.

An example of the conventional photographing device mentioned above will be described below with reference to the drawings. Conventionally, this type of photographing device has had a structure as shown in the front and side views of FIGS. 3 and 4, as shown in, for example, Japanese Patent Application Laid-Open No. 53-64175. That is, there is a rotor case 1 containing a rotor that rotates at high speed at the center as a direction gyroscope, and this is supported by a horizontal gimbal 3 with left and right horizontal axes 2, and the horizontal gimbal 3 is further supported with a vertical gimbal 5 with left and right gimbal axes 4. is supported by Similarly, the vertical gyro is located in the center rotor case 6.
is supported by a horizontal gimbal 7 and a vertical gimbal 8, and a video camera 9 and the like are installed on the rotor case 6. Therefore, by rotating the direction and vertical dials at high speed, the video camera 9 remains stable even when photographing in a shaking state, and it is possible to obtain photographed images with less blur.

Problems to be Solved by the Invention However, the above configuration uses a gyroscope that rotates at high speed, which increases the size and weight of the device, so the entire device must be installed and used. There was a problem with lack of maneuverability.

Means for Solving the Problems In order to solve the above problems, the photographing device of the present invention includes a camera body having a photoelectric conversion means for converting an optical image from a photographing lens for photographing a subject into an electrical signal, and a camera mounting part to which the main body can be attached; a first driving means for driving the camera body and the camera mounting part in the yawing direction (or pitching direction); and a first driving means fixed to the camera mounting part. a first angular velocity sensor that detects an angular velocity around a drive shaft; a second drive means that drives the camera body, the camera mounting portion, and the first drive means in a pitching direction (or a yawing direction); a second angular velocity sensor that rotates integrally with the first drive means to detect the angular velocity around the second drive shaft; The second control means includes a first control means for controlling the second drive means, and a second control means for controlling the second drive means in accordance with the output of the second angular velocity sensor.

Effects Due to the above-described structure, the present invention does not use a large and heavy gyro as in the conventional case, so it can be easily configured to be small and lightweight, and the photographer can use it hand-held. Since it is configured so that it can be attached to the camera, it is possible to take pictures with great mobility, and it is possible to perform camera work with reduced image blur without using a tripod.

Embodiment A photographing device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of the main parts of a photographing device according to an embodiment of the present invention, in which a camera body 11 has a photographing lens 12 on the front surface for photographing a subject. The optical image obtained is
An image sensor 13 such as a CCD (charge coupled device) provided on the focal plane of the photographic lens 12
is converted into an electrical signal by This electrical signal is converted into a predetermined video signal by the video circuit 14, and is connected to a camera terminal 15 provided on the bottom surface of the camera body 11.
is transmitted to. A recess 1 is provided on the bottom surface of the camera body 11.
6, and is engaged with a convex portion 18 provided on the upper surface of the rotating plate 17 so as to be attachable. The rotating plate 17 is
The camera body 11 and the rotating plate 17 are rotatably supported by a ball bearing 20 press-fitted into the intermediate plate 19 about the center of gravity of the rotating plate 17, and a back made of magnetic material is provided on the lower surface of the rotating plate 17. A ring-shaped magnet 22, which has been magnetized as required, is bonded via the plate 21. Further, a stator winding 24 is bonded to the upper surface of the intermediate plate 19 at a position facing the magnet 22 via a stator flat plate 23 made of a magnetic material. At the center of the convex portion 18 of the rotating plate 17,
A rotating plate terminal 25 that can be contacted with the camera terminal 15 is provided, and a video signal etc. supplied to the camera terminal 15 can be transmitted. Furthermore, the intermediate plate 19
On the right side of the is a back plate 26 made of magnetic material.
A ring-shaped magnet 27 that has been magnetized in a predetermined manner is adhered to the fixed plate 28 through a stator plate 29 made of a magnetic material. A wire 30 is glued. A shaft portion 31 is provided on the right side of the intermediate plate 19, and a ball bearing 32 is press-fitted into the fixed plate 28.
The camera body 11, rotating plate 17 and intermediate plate 1
It is rotatably supported approximately at the center of gravity with respect to 9. Note that the intermediate plate 19 is connected to the magnet 2
7 and the stator flat plate 29, it is stably held without falling off.

The fixing plate 28 has a concave portion 33 on the right side, and a convex portion 3 on the left side of the hand grip 34.
5 and is removably engaged with it. Furthermore, the fixing plate 28
A fixed plate terminal 36 and a grip terminal 37 are provided on the right side surface of the hand grip 34 and the left side surface 34 of the hand grip 34, respectively.
is provided so that it can be contacted. Furthermore, the fixed plate 17, the intermediate plate 19, and the fixed plate 28 each have through holes 38, 39, and 40 for passing lead wires therethrough. A view finder mounting bracket 41 is provided on the upper surface of the hand grip 34, and a view finder 42 for checking the video signal is fixed thereto. The hand grip 34 also includes a zoom switch 43 for electrically zooming the photographic lens 12, a VTR connection terminal 44, and a
A recording switch 45 is provided for controlling the recording operation of the VTR. FIG. 2 is a block diagram showing electrical connections, and the control circuit 46 built in the intermediate plate 19 is connected to the angular velocity sensor 47 provided on the rotating plate 17.
magnet 22 and stator winding 2 according to the signal of 7.
4, etc., is driven. The angular velocity sensor 47 detects camera shake in the yawing direction when rotating in a horizontal plane, and the control circuit 46 controls the actuator 48 so that the output of the angular velocity sensor 47 always approaches zero, thereby detecting camera shake in the horizontal direction. can be reduced. Similarly, a control circuit 49 is built into the fixed plate 28, and drives an actuator 51 composed of a magnet 27, a stator winding 30, etc. in response to a signal from an angular velocity sensor 50 provided on the intermediate plate 19. . The angular velocity sensor 50 detects camera shake in the pitching direction rotating in a vertical plane, and the control circuit 49 controls the actuator 51 so that the output of the angular velocity sensor 50 always approaches zero, thereby detecting camera shake in the vertical direction. Shake can be reduced.

The power supply 52 supplied to the VTR connection terminal 44 is supplied to the intermediate plate 19 via the grip terminal 37 and the fixed plate terminal 36, and is further supplied to the through holes 38, 39, 40.
It is supplied to the camera body 11 via the rotating plate terminal 25 and the camera terminal 15. Further, a recess 53 and a side terminal 54 are also provided on the right side of the camera body 11.
is provided and configured to be able to engage with the protrusion 35 of the hand grip 34 and the grip terminal 37.

The angular velocity sensors 47 and 50 are provided with a detection piezo element perpendicular to the drive piezo element at the tip of the drive piezo element that constitutes a cantilever-shaped vibrator, and the drive piezo element detects the detection piezo element. This method vibrates at a constant frequency, detects the Coriolis force generated by the rotational angular velocity of the sensor using means such as phase separation, and outputs it as an angular velocity signal, and is much smaller than methods using rotating gyroscopes etc. -Can be made lighter.

Further, the output lead wire of the angular velocity sensor 47 is connected to the control circuit 46 via the through holes 38 and 39, and the output lead wire of the angular velocity sensor 50 is connected to the control circuit 46 through the through holes 39 and 4.
0 to the control circuit 49.

The operation of the photographing apparatus configured as described above will be explained below. First, the camera body 11 and the rotating body 17 are connected, the fixed plate 28 and the hand grip 34 are connected, and the hand grip 34 is held to take a photograph. At this time, horizontal and vertical camera shake is detected by the angular velocity sensors 47 and 50, and the control circuit 46 drives the actuator 48, the control circuit 49 drives the actuator 51,
By controlling the outputs of the angular velocity sensors 47 and 50 to always approach zero, the camera body 11 does not shake even if the hand grip 34 held in the hand shakes due to camera shake, etc., and stable images can be taken. This video can be recorded on a VTR (not shown) connected to the connection terminal 44.

Also, the camera body 11 and the rotating plate 17 are separated,
By engaging the convex portion 35 on the left side of the hand grip 34 and the concave portion 53 on the right side of the camera body, it is possible to take pictures in the same way as a normal video camera without correcting image blur. It can also be fixed to a tripod or the like using a tripod mounting screw (not shown) or a recess 16 provided on the bottom surface.

As described above, the photographer can obtain images with less blur even when shooting hand-held, and since the movable part is supported to rotate approximately around the center of gravity, the device's power source is The camera does not tilt significantly even if the shaft is cut, and the moment load on the shaft is small even when the control circuit is in operation, making it possible to reduce power consumption. In addition,
In the embodiment, the first movable part is moved in the yawing direction, and the second movable part is moved in the yawing direction.
Although the explanation has been given on the case where the movable section is rotated in the pitching direction, it is essentially the same even if the first movable section is rotated in the pitching direction and the second movable section is rotated in the yawing direction.

Effects of the Invention As described above, the present invention provides a camera body having a photoelectric conversion means for converting an optical image from a photographing lens for photographing a subject into an electrical signal, a camera mounting portion to which the camera body can be attached, and a camera mounting portion to which the camera body can be attached. a first driving means for driving the main body and the camera mounting section in the yawing direction (or pitching direction); and a first angular velocity fixed to the camera mounting section for detecting the angular velocity around the drive shaft of the first driving means. a sensor, a second drive means for driving the camera body, the camera mounting portion, and the first drive means in a pitching direction (or a yawing direction); and a second drive means that rotates integrally with the first drive means. a second angular velocity sensor that detects an angular velocity around the second drive shaft; a first control means that controls the first drive means in response to an output of the first angular velocity sensor; By providing the second control means for controlling the second drive means in response to the output of the angular velocity sensor, the apparatus can be easily constructed to be small and lightweight, and can be used hand-held by the photographer. Since the camera body is configured to be attachable, it is possible to take pictures with great mobility, and it is possible to perform stable camera work with reduced image blur without using a tripod.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main parts of a photographing device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing its electrical connections. FIG. 3 is a front view of a conventional photographing device, and FIG. 4 is a side view thereof. 11...Camera body, 16...Recess, 17...
Rotating plate, 18...Convex portion, 19...Intermediate plate, 22...
... Magnet, 24 ... Stator winding, 27 ... Magnet, 28 ... Fixed plate, 30 ... Stator winding, 46 ... Control circuit, 47 ... Angular velocity sensor,
48...actuator, 49...control circuit, 5
0... Angular velocity sensor, 51... Actuator.

Claims (1)

[Claims] 1. A camera body having a photoelectric conversion means for converting an optical image from a photographing lens for photographing a subject into an electric signal, a camera mounting part to which the camera body can be attached, and a camera body and a camera mounting part arranged in a yawing direction ( or pitching direction); a first angular velocity sensor that is fixed to the camera mounting portion and detects the angular velocity around the drive shaft of the first drive means; and the camera body and the camera mounting. a second drive means for driving the part and the first drive means in the pitching direction (or yawing direction); a second angular velocity sensor for detecting; a first control means for controlling the first driving means in response to the output of the first angular velocity sensor; A photographing device comprising: a second control means for controlling a second drive means.