JPS61177875A - Photographing device - Google Patents

Abstract

PURPOSE:To carry easily the titled device by providing a control means to control so that a locking means can lock a driving means when it is detected that the electric power source supplied to the driving means by the detecting means is cut. CONSTITUTION:As a locking mechanism in the yawing direction, a self-holding type solenoid 53 is fixed to an intermediate plate 19, and at the tip of the solenoid 53, a brake shoe 54 is provided in the vapable-of-abutting way at the outer circumference part of a rotating plate 17 by a compressing spring 55. The solenoid 53 is connected to a solenoid control circuit 57,an electric power source detecting circuit 56 detects that the electric power source supplied to actuators 48 and 51 is cut, and then, by the electric power of the capacitor which is built in the circuit 57, energizing is executed to the solenoid 53 and an actuator 48 is locked. The locking mechanism in the pitching direction is also the same as the above-mentioned operation, a solenoid 59 is fitted to a fixed plate 28, and a brake shoe 60 is provided in the capable-of-abutting way at the outer circumference part of the intermediate plate 19 by a compressing spring 61.

Description

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

BACKGROUND OF THE INVENTION 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 is shown in FIG.
The structure was as shown in the front and side views in Figure 4. That is, there is a rotor case 1 that houses a rotor that rotates at high speed at the center as a directional gyro, 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, a 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 directional gyro and vertical gyro at high speed, the video camera 9 can be used even when shooting in shaking conditions.
is stable and allows you to obtain captured images with little blur.

Problems to be Solved by the Invention However, the above configuration uses a gyro 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, if the power supply to the gyro is turned off, the video camera will be in an unstable state, so it is necessary to handle the device when transporting it. was inconvenient.

Means for Solving the Problems In order to solve the above-mentioned problems, the photographing apparatus 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 the camera body. a driving means for rotating a predetermined amount in the yawing direction (or pitching direction), a detection means for detecting that the power supply to the driving means is cut off, and a locking means for locking the rotation of the driving means; and a 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. The above configuration does not use the large and heavy gyro of conventional models, making it easy to create a compact and lightweight configuration, allowing photographers to use it hand-held, and rotating even when the power is cut off. Since the parts are locked, it can be easily held.

Embodiment Hereinafter, a photographing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration 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, and The optical image is converted into an electrical signal by an image sensor 13 such as a COD provided on the focal plane of the photographic lens 12. This electric signal is converted into a predetermined video signal by the video circuit 14 and transmitted to the camera terminal 16 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. The rotating plate 17 is connected to the camera body 11 by a ball bearing 2o press-fitted into the intermediate plate 19.
The rotary plate 17 is rotatably supported around approximately the center of gravity of the rotating plate 17, and a ring-shaped magnet 22, which is magnetized as required, is mounted on the lower surface of the rotary plate 17 via a back plate 21 made of a magnetic material. It is glued. In addition, a magnet 2 is attached to the upper surface of the intermediate plate 19 via a stator flat plate 23t made of a magnetic material.
A fixed pre-winding 824 is bonded to a position facing 2.

A rotating plate terminal 26 that can come into contact with the camera terminal 16 is provided at the center of the convex portion 18 of the rotating plate 17.
The video signal etc. supplied to 6 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 to the left side of the fixed plate 28,
Magnet 2 via stator flat plate 29'ii made of magnetic material
A fixed pre-winding @30 is glued at a position opposite to 7.

The intermediate plate 19 has a shaft portion 31 on the right side, and a ball bearing 32 press-fitted into the fixed plate 28 rotates the center of gravity of the camera body 11, rotating plate 17, and intermediate plate 19 as a center. It is rotatably supported. 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 recess 33″fI on the right side.
It engages with a protrusion 36 provided on the left side surface of the hand grip 34. 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 come into contact with each other. Further, the rotating plate 17, the intermediate plate 19, and the fixed plate 28 have through holes 38, 39, and 40', respectively, for passing lead wires. A 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 is also provided with a zoom switch 43 for electrically zooming the photographic lens 12, a VTR connection terminal 44, and a recording switch 46 for controlling the operation of the connected VTR (7)e. ing. FIG. 2 is a block diagram showing the electrical connections of the servo system, etc., and the control circuit 46 built in the intermediate plate 19 is connected to the rotating plate 17.
An angular velocity sensor 47 provided at
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, so that the camera shake in the horizontal direction is camera shake can be reduced. Similarly, fixed plate 2
8 also has a built-in control circuit 49, and drives an actuator 61''f constituted by a magnet 27, a stator winding 30, etc. in accordance with a signal from an angular velocity sensor 5o provided on the intermediate plate.The angular velocity sensor 50 is It detects camera shake in the pitching direction rotating in a vertical plane, and the control circuit 4 ensures that the output of the angular velocity sensor 60 always approaches zero.
9 controls the actuator 51, vertical camera shake can be reduced.

The power supply 62 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 further to the rotating plate terminal 26 and the camera terminal 15 via the through holes 3B and 39.40. "f" is supplied to the camera body 11 via.

Next, the lock mechanism will be explained. First, as a locking mechanism in the yawing direction, a self-holding solenoid 53 is fixed to the intermediate plate 19, and a brake shoe 54 is attached to the tip of the solenoid 53, and a compression spring 66 abuts the outer periphery of the rotating plate 17. possible. The solenoid 53 is connected to a solenoid control circuit 57, and when the power supply detection circuit 56 detects that the power supply to the actuator 48.51 is cut off, a capacitor (not shown) built in the solenoid control circuit 57 is connected. With the electric power, the solenoid 53 is energized and the actuator 48'f is locked. The locking mechanism in the pitching direction is also similar, and 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 circumference of the intermediate plate 19 by a compression spring 61. The solenoid control circuit 62 includes a power supply detection circuit 5.
6 is connected and can similarly drive a solenoid 69.

The operation of the photographing apparatus configured as described above will be explained below. First, when the actuators 48 and 51 are not locked and the camera body 11 is rotatably supported, horizontal and vertical camera shake is detected by the angular velocity sensor 47.60, and the control circuit 46 causes the actuator 48 to By driving the actuator 51 by the control circuit 49 and controlling the outputs of the angular velocity sensors 47 and 50 so that they always approach zero, the camera body 11 is controlled even if the hand grip 34 held in the hand shakes due to camera shake or the like.
You can shoot stable images without shaking, and the VTR
This video can be recorded on a VTR (not shown) connected to the connection terminal 44.

Next, when the power is turned off, the power detection circuit 56 detects this, the solenoid control circuit 67 drives the solenoid 53, and releases the self-holding of the solenoid 53.
The brake shoe 54 is moved to the rotating plate 17 by the compression spring 55.
actuator 48 by pressing against the outer periphery of
lock. In addition, the yawing lock switch 5
By operating 8, the actuator can be locked as necessary even during energization. The pitching direction also operates in the same manner, and the actuator 51 is locked, and by operating the pitching lock switch 64, it is possible to lock the actuator 51 even when energized.

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

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the main parts of an imaging 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 imaging device, and FIG. 4 is a side view. It is. 11...Camera body, 48...Actuator, 61...Sword tuator, 53...
... Solenoid, 56 ... Power supply detection circuit,
57... Solenoid control circuit, 59...
・Solenoid, 62...Solenoid control circuit. Name of agent: Patent attorney Toshi Nakao TL or 1 person 1
113 Figure Q Rei 4 Figure 4.7

Claims (1)

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