JPH0324116B2 - - 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 apparatus has had a structure as shown in the front and side views of FIGS. 3 and 4, as shown in, for example, Japanese Patent 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 rotor case 6 at the center of the vertical gyro 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 dial and the vertical dial 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 Present 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. In addition to the problem of lack of maneuverability, even if the weight of the entire device is made so that it can be held in hand, the video camera will be left in an unstable state if the power supply to the camera is cut off, so transporting the device will be difficult. It was inconvenient to handle.

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 body that a drive means for rotating a predetermined amount in the yawing direction (or pitching direction); a detection means for detecting that the power supply to the drive means is cut off; and a lock means for locking the rotation of the drive means; and control means for controlling the locking means to lock the driving means when the detection means detects that the power supplied to the driving means is cut off.

Effects Due to the above-described configuration, the present invention does not use a large and heavy gyro as in the past, so it can be easily configured to be small and lightweight, and can be used hand-held by the photographer, without requiring a power supply. Even if it is cut, the rotating part is locked, making it easy to hold.

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
It is converted into an electrical signal by a photographing element 13 such as a CCD provided on the focal plane of the photographing lens 12. This electric signal is converted into a predetermined video signal by the video circuit 14 and transmitted to the camera terminal 15 provided on the bottom surface of the camera body 11. The camera body 11 has a recess 16 on the lower surface, which engages with a protrusion 18 on the upper surface of the rotating plate 17. Rotating plate 17
is rotatably supported by a ball bearing 20 press-fitted into the intermediate plate 19 about approximately the center of gravity of the camera body 11 and the rotary plate 17, and the rotary plate 1
A ring-shaped magnet 22, which is magnetized as required, is adhered to the lower surface of the magnet 7 via a back plate 21 made of a magnetic material. 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, there is a rotating plate terminal 25 that can be contacted with the camera terminal 15.
A video signal and the like supplied to the camera terminal 15 can be transmitted. Further, a ring-shaped magnet 27 that is magnetized in a predetermined manner is adhered to the right side of the intermediate plate 19 via a back plate 26 made of a magnetic material, and a ring-shaped magnet 27 made of a magnetic material is attached to the left side of the fixed plate 28. A stator winding 30 is bonded to a position facing the magnet 27 with a stator flat plate 29 in between. A shaft portion 31 is provided on the right side of the intermediate plate 19.
The ball bearing 3 is press-fitted into the fixed plate 28.
2, the camera body 11, the rotary plate 17, and the intermediate plate 19 are rotatably supported approximately at the center of gravity. Note that the intermediate plate 19 is stably held without falling off due to the attraction force between the magnet 27 and the stator flat plate 29.

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.
It is engaged with 5. Furthermore, a fixing plate terminal 36 and a grip terminal 37 are provided on the right side surface of the fixing plate 28 and the left side surface 34 of the hand grip 34, respectively, so as to be able to contact each other. Further, the rotating 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 viewfinder mounting bracket 41 is provided on the upper surface of the hand grip 34, and a viewfinder 42 for checking the video signal is fixed thereto. The hand grip 34 also has a photographic lens 1.
A zoom switch 43 for electrically performing the zoom operation (2), a VTR connection terminal 44, and a recording switch 45 for controlling the recording operation of the connected VTR are provided. FIG. 2 is a block diagram showing the electrical connections of the servo system, etc., and shows the intermediate plate 19.
A built-in control circuit 46 is connected to an angular velocity sensor 47 provided on the rotating plate 17, and in response to the signal from the angular velocity sensor 47, an actuator 48 composed of a magnet 22, stator winding 24, etc.
is driving. 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.
By controlling the horizontal camera shake, horizontal camera shake can be reduced. Similarly, a control circuit 49 is built into the fixed plate 28, and drives an actuator 51 constituted by the magnet 27, stator winding 30, etc. in response to a signal from an angular velocity sensor 50 provided on the intermediate plate. 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.

Next, the lock mechanism will be explained. First, a self-holding solenoid 53 is fixed to the intermediate plate 19 as a locking mechanism in the yawing direction, and a brake shoe 54 is attached to the tip of the solenoid 53.
It is provided so as to be able to come into contact with the outer periphery of the rotary plate 17 by a compression spring 55 . The solenoid 53 is connected to a solenoid control circuit 57 and a power supply detection circuit 56.
When it is detected that the power supplied to the actuators 48, 51 is cut off, the solenoid 53 is energized by the power of a capacitor (not shown) built in the solenoid control circuit 57, and the actuator 53 is turned off. 48. The same applies to the locking mechanism in the pitching direction, in which a solenoid 59 is attached to the fixed plate 28, and a brake shoe 60 is provided so as to be able to come into contact with the outer periphery of the intermediate plate 19 by means of a compression spring 61. The solenoid control circuit 62 includes a power supply detection circuit 5.
6 is connected and can similarly drive the solenoid 59.

The operation of the photographing apparatus configured as described above will be explained below. First, actuator 4
8 and 51 are not locked, and the camera body 11
is rotatably supported, the angular velocity sensor 4
7 and 50 detect camera shake in the horizontal and vertical directions, and the control circuit 46 detects camera shake in the actuator 4.
8 to the actuator 51 by the control circuit 49.
By controlling the output 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 a stable image can be taken. is completed and connected to VTR connection terminal 44.
This video can be recorded on a VTR (not shown).

Next, when the power is turned off, the power detection circuit 56 detects this, and the solenoid control circuit 57 drives the solenoid 53.
The self-holding of the actuator 48 is released and the brake shoe 54 is pressed against the outer periphery of the rotary plate 17 by the compression spring 55, thereby locking the actuator 48. By operating the yawing lock switch 58, the actuator can be locked as necessary even when the power is on. The pitching direction operates in the same manner, and the actuator 51 is locked, and by operating the pitching lock switch 64, it is possible to lock it even when the power is on.

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, and a camera body that is moved in a predetermined direction in a yawing direction (or in a pitching direction). a drive means for rotating the drive means; a detection means for detecting that the power supply to the drive means is cut off; a lock means for locking the rotation of the drive means; By including a control means for controlling the locking means to lock the driving means when it is detected that the supplied power is cut off, the video camera can be easily handled when the power is cut off. can.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of the main parts of a photographing device 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 device, and Fig. 4 is a side view. It is. DESCRIPTION OF SYMBOLS 11... Camera body, 48... Actuator, 51... Actuator, 53... Solenoid, 56... Power supply detection circuit, 57... Solenoid control circuit, 59... Solenoid, 62... Solenoid control circuit.

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 electrical signal, a drive means for rotating the camera body by a predetermined amount in a yawing direction (or pitching direction), and a drive means for rotating the camera body by a predetermined amount in a yawing direction (or pitching direction); a detection means for detecting that the power supply supplied to the drive means is cut off; a lock means for locking rotation of the drive means; and a detection means for detecting that the power supply supplied to the drive means is cut off by the detection means. 1. A photographing device comprising: control means for controlling the locking means to lock the driving means when the locking means is detected.