JPH0683390B2 - Imaging device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to video cameras.

2. Description of the Related Art In recent years, with the spread of video tape recorders (hereinafter referred to as VTRs), there are more opportunities to shoot with a video camera, and stable camera work can be performed without blurring the image without using a tripod. Video camera is required.

Hereinafter, an example of the above-described conventional imaging device will be described with reference to the drawings. Conventionally, this type of photographing apparatus has been shown in FIGS. 3 and 4 as shown in, for example, Japanese Patent Laid-Open No. 53-64175.
It had the structure shown in the figure. FIG. 3 is a front view of a conventional photographing apparatus, and FIG. 4 is a side view. In FIGS. 3 and 4, there is a rotor case 1 having a rotor that rotates at high speed as a directional gyro, which is supported by a horizontal gimbal 3 by horizontal shafts 2 on the left and right, and the horizontal gimbal 3 is It is supported by a vertical gimbal 5 on its gimbal shaft 4. Similarly, in the vertical gyro, the center rotor case 6 is supported by the horizontal gimbal 7 and the vertical gimbal 8, and the video camera 9 and the like are installed on the rotor case 6. Therefore, by rotating the direction gyro and the vertical gyro at high speed, the video camera 9 is stable even when shooting in a swaying state, and a shot image with little image blur can be obtained.

Problems to be Solved by the Invention However, in the above-described configuration, since the gyro that rotates at high speed is used, the device becomes large in size and the weight also increases. Therefore, normally, the entire device must be installed and used. In addition to the problem of lack of mobility, when handheld shooting is performed and it is not necessary to prevent image blur, it is sufficient to stop the image blur prevention means such as a gyro. There is a problem in that it is difficult to set the desired shooting direction because the effect is lost, the stability of the horizontal gimbals 3, 7 and the vertical gimbals 5, 8 is lost, and the video camera becomes unstable. Further, at the time of early panning or the like, due to inertia of the camera body, an angle difference occurs between the photographing device and the camera body in an attempt to stay in the original position. Therefore, there is a problem that it is difficult to determine the shooting direction. Means for Solving the Problems In order to solve the above problems, the present invention converts an optical image from a shooting lens for shooting a subject into an electric signal. Camera body having photoelectric conversion means, drive means for rotating the camera body in a yawing direction (or pitching direction) by a predetermined amount, braking means for braking the drive means, and swing detection for detecting swing of the camera body. It comprises a means, a comparing means for judging that the detection signal from the swing detecting means has become a predetermined value or more, and a control means for controlling the driving of the braking means by the signal from the comparing means.

Effect The present invention does not use a large and heavy gyro as in the related art due to the above-mentioned configuration, so that it is easy to make the device small and lightweight, and the photographer can use it by hand.
Further, when the angular velocity detected by the angular velocity sensor becomes larger than the value initially set by the comparison circuit, the driving means for driving the camera body is braked by the braking means and the camera body, and the like. It is possible to prevent contact with other members, so that you can shoot with confidence.

In addition, even when performing quick panning or tilting, the camera body tries to stay in its original position due to the inertia of the camera body even when the entire shooting device is panned. Angle difference occurs. Therefore, when an angular velocity higher than the initial setting is generated, by braking the driving means, the camera body and the photographing device are integrally rotated, and an angular difference in the photographing direction does not occur, so that photographing can be performed without a sense of discomfort. . Then, when the angular velocity becomes equal to or lower than a predetermined angular velocity (at the end of panning, etc.), the anti-vibration effect can be obtained again by releasing the braking.

Embodiment An image pickup apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a main part of a photographing device according to an embodiment of the present invention. A photographing lens 12 for photographing a subject is provided on a front surface of a camera body 11 and is obtained by the photographing lens 12. The optical image is CC on the focal plane of the taking lens 12.
It is converted into an electric signal by the image pickup device 13 such as D. The electric signal is converted into a predetermined video signal by the video circuit 14 and transmitted to the camera terminal 15 provided on the lower surface of the camera body 11. A recess 16 is provided on the lower surface of the camera body 11, and is engaged with a projection 18 provided on the upper surface of the rotating plate 17. Rotating plate 17
Is mounted on the camera body 11 by a ball bearing 20 press-fitted into the intermediate plate 19.
And a rotating plate 17 are rotatably supported about the center of gravity, and the lower surface of the rotating plate 17 is made of a magnetic material and has a ring shape with a desired magnetization through a back plate 21. The magnet 22 of is adhered. 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. Rotating plate
A rotary plate terminal 25 capable of contacting the camera terminal 15 is provided at the center of the convex portion 17 of the 17, so that a video signal or the like supplied to the camera terminal 15 can be transmitted. Further, on the right side surface of the intermediate plate 19, via the back plate 26 made of a magnetic material,
A ring-shaped magnet 27 that is magnetized in a predetermined manner is adhered, and a stator flat plate 29 made of a magnetic material is provided on the left side surface of the fixed plate 28.
The stator winding 30 is bonded to a position facing the magnet 27 via. The intermediate plate 19 has a shaft portion 31 on the right side surface thereof, and a ball bearing 32 press-fitted into the fixed plate 28 allows the camera body to be mounted.
11 and the rotating plate 17 and the intermediate plate 19 are rotatably supported about the center of gravity. The intermediate plate 19 is stably held by the attraction force of the magnet 27 and the stator flat plate 29 without falling off.

The fixed plate 28 has a recess 33 on the right side surface, and engages with a projection 35 on the left side surface of the hand grip 34. Further, a fixing plate terminal 36 is provided on each of the right side surface of the fixing plate 28 and the left side surface 34 of the hand lip 34 so that the grip terminal 37 can come into contact therewith. Further, the rotating plate 17, the intermediate plate 19, the fixed plate 28
Has through holes 38, 39, 40 for passing lead wires, respectively. A finder mounting bracket 41 is provided on the upper surface of the handgrip 34, and a viewfinder 42 for confirming a video signal is fixed.

In addition, the handgrip 34 has a zoom switch 43 for electrically zooming the photographing lens 12 and a VTR connection terminal 4
4. A recording switch 45 for controlling the recording operation of the connected VTR is provided. FIG. 2 is a block diagram showing the electrical connection of the servo system and the like. The control circuit 46 is connected with the angular velocity sensor 47 provided on the rotating plate 17, and the magnet is generated according to the signal of the angular velocity sensor 47. An actuator 48 constituted by 22 and the stator winding 24 is driven. The angular velocity sensor 47 detects a camera shake in a yawing direction that rotates in a horizontal plane, and a control circuit so that the output of the angular velocity sensor 47 always approaches zero.
By controlling the actuator 48 by 46, horizontal camera shake can be reduced. Similarly, the control speed is controlled according to the signal from the angular velocity sensor 50 provided on the intermediate plate 19.
46 drives an actuator 51 composed of a magnet 27, a stator winding 30, and the like. Angular velocity sensor
Reference numeral 50 is for detecting camera shake in the pitching direction that rotates in a vertical plane, and the control circuit 46 controls the actuator 51 so that the output of the camera 50 always approaches zero, thereby reducing camera shake in the vertical direction. It can be done.

The power 52 supplied to the VTR connection terminal 44 is the grip terminal 37,
Supplied to the intermediate plate 19 via the fixed plate terminal 36, and further through holes
It is supplied to the camera body 11 via the rotary plate terminal 25 and the camera terminal 15 via 38, 39 and 40.

Next, the braking mechanism will be described. First, as a braking mechanism in the yawing direction, a self-holding solenoid 53 is fixed to the intermediate plate 19, and a brake shoe 54 abuts the outer peripheral portion of the rotating plate 17 by a compression spring 55 at the tip of the solenoid 53. It is possible. The solenoid 53 is connected to a solenoid drive circuit (not shown) in the control circuit 46,
When the angular velocity in the yawing direction is detected by the angular velocity sensor 47 and is larger than the angular velocity initialized by the comparison circuit 49, the solenoid drive circuit in the control circuit 46 (not shown)
To the solenoid 53 to brake the camera body 11 in the yawing direction. Also, in the braking state,
When the angular velocity detected by the angular velocity sensor 11 becomes smaller than the initially set angular velocity, the solenoid 53 is driven to release the braking.

The same applies to the pitching direction, a self-holding solenoid 59 is fixed to the fixed plate 28, and a brake shoe 60 is provided at the tip of the solenoid 59 so as to be able to contact the outer peripheral portion of the intermediate plate 19 by a compression spring 61. ing. The solenoid 59 is connected to a solenoid drive circuit (not shown) in the control circuit 46. When the angular velocity in the pitching direction is detected by the angular velocity sensor 50 and is larger than the angular velocity initially set by the comparison circuit 49, The camera body is driven by sending a signal to the solenoid drive circuit (not shown) in the control circuit 46 to drive the solenoid 59.
Braking in 11 pitching directions. Further, in the braking state, when the angular velocity detected by the angular velocity sensor 50 becomes smaller than the initially set angular velocity, the solenoid 59 is driven to release the braking.

The operation of the image pickup apparatus configured as described above will be described below. First, when the actuators 48 and 51 are not controlled and the camera body 11 is rotatably supported, the angular velocity sensors 47 and 50 detect horizontal and vertical camera shake, and the control circuit 46 causes the actuator 4 to move.
By driving 8, 51 and controlling the outputs of the angular velocity sensors 47, 50 so that they are always close to zero, the camera body 11 does not shake even if the hand grip 34 held by hand shakes due to camera shake, etc., and a stable image is obtained. Can be taken, VTR connection terminal 4
This video can be recorded on a VTR (not shown) connected to the 4.

Next, a description will be given of quick panning and impact. The detection signal of the angular velocity from the angular velocity sensors 47, 50 is the comparison circuit 4
When it is larger than the value of the angular velocity initially set by 9, the signal is sent to the solenoid drive circuit (not shown) in the control circuit 46 to drive the solenoids 53 and 59 to rotate the rotary plate 17 and the intermediate plate 19. To brake the rotation of the camera body 11. Further, when the detection signal of the angular velocity from the angular velocity sensors 47, 50 becomes smaller than the value of the angular velocity initialized by the comparison circuit 49 in the braking state, the solenoid drive circuit (not shown) in the control circuit 46 is shown. ) Signal to solenoid 5
3,59 are driven to release the braking of the rotating plate 17 and the intermediate plate 19. This causes the anti-vibration effect again.

In the present invention, the swing of the camera body is detected by the angular velocity sensor, but any swing sensor can be used. For example, there is an acceleration sensor. Although the intermediate plate which is the rotating plate is braked when braking, the camera body may be braked.

As described above, according to the present invention, the camera body having the photoelectric conversion means for converting the optical image from the photographing lens for photographing the subject into an electric signal and the camera body is rotated by a predetermined amount in the yawing direction or the pitching direction. Driving means, braking means for braking the driving means, rocking detecting means for detecting rocking of the camera body, and comparing means for judging that the detection signal from the rocking detecting means has exceeded a predetermined value. And a control means for driving and controlling the braking means by a signal from the comparison means, a large and heavy gyro as in the past is not used. Can be used by hand. Further, when the angular velocity detected by the angular velocity sensor in the comparison circuit is compared with the initially set value and becomes larger, the rotating plate and the intermediate plate are braked by the braking means, and the camera body and other It is possible to prevent contact with other members, so that you can shoot with confidence.

In addition, even when performing quick panning or tilting, the camera body tries to stay in its original position due to the inertia of the camera body even when the entire shooting device is panned. Angle difference occurs. Therefore, when an angular velocity higher than the initial setting is generated, by braking the driving unit, the camera body and the photographing device are integrally rotated, and an angular difference in the photographing direction does not occur, so that photographing can be performed without a sense of discomfort. Then, when the angular velocity becomes equal to or lower than a predetermined angular velocity (at the end of panning, etc.), the anti-vibration effect can be obtained again by releasing the braking.

[Brief description of drawings]

FIG. 1 is a block diagram showing the essential parts of a photographing apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram showing electrical connections, FIG. 3 is a front view of a conventional photographing apparatus, and FIG. It is a side view of the imaging device of. 11 …… Camera body, 17 …… Rotating plate, 19 …… Intermediate plate, 48,5
1 …… Actuator, 47,50 …… Angular velocity sensor, 5
3,59 …… Solenoid, 46 …… Control circuit, 49 …… Comparison circuit.

Claims (1)

[Claims] 1. A camera body having photoelectric conversion means for converting an optical image from a photographing lens for photographing a subject into an electric signal, and driving means for rotating the camera body in a yawing direction or a pitching direction by a predetermined amount. Braking means for braking the drive means, rocking detection means for detecting rocking of the camera body, and comparison means for judging that the detection signal from the rocking detection means is equal to or more than a predetermined value, An image pickup apparatus comprising: a control unit that drives and controls the braking unit according to a signal from the comparison unit.