JPS61192179A - Photographing device - Google Patents

Abstract

PURPOSE:To improve a response in a panning photographing etc. by rotating a camera main body in the direction of yawing or pitching, detecting the range of rotation and controlling load to increase to a rotating means when rotating volume over the prescribed volume is detected. CONSTITUTION:In a brake mechanism, a solenoid 53 for a brake is fixed as a yawing direction on an intermediate plate 19 and on the tip of the solenoid, a brake shoe 54 is provided in such a way that the brake shoe can abut on the outer peripheral part of a rotating plate 17. Also, in the central space part of a fixed coil 24, a Hall element 55 is installed and the rotating angle of an actuator 48 can be detected by detecting the magnetized condition of a magnet 22. And when a fast panning photographing is carried out, the directions of a hand grip 34 and a camera main body 11 are long ways off and the Hall element 55 detects this and a brake control circuit 56 drives the solenoid 53 for the brake and the rotating load of the actuator 48 is increased and controlled.

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 machines that use video cameras to take pictures, and there is a demand for video cameras 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 Application Laid-Open No. 53-64175. That is, there is a rotor case 1 that houses a rotor that rotates at high speed in the center as a directional gyro, and 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 with left and right gimbal axes 4. It is supported by 5. 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 the vertical gyro at high speed, the video camera 9 is stable even when shooting in a shaking state, and it is possible to obtain captured images with less blur. Problems However, the above configuration uses a gyro that rotates at high speed, which increases the size and weight of the device, which means that the entire device must be installed and used, resulting in a lack of maneuverability. In addition to this problem, even if the entire device is made lighter and shaped to allow hand-held shooting, the response will be delayed when the camera is moved suddenly, such as during fast panning, and an image may be taken that is different from the photographer's intention. There was a problem with this.

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 the camera body. a rotating means for rotating in a yawing direction (or a pitching direction), a detecting means for detecting a rotation range of the rotating means, and a detecting means for detecting that the rotating means has rotated by a predetermined number of rotations. and control means for controlling so as to increase the load applied to the rotation means when the rotation means is detected.

Effects The present invention does not use a large and heavy gyro like the conventional one, so it can be easily constructed to be small and lightweight, and can be used hand-held by the photographer, making it suitable for panning photography, etc. Response can be improved.

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 diagram showing 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 photographic lens 12 has a photographing lens 12 for photographing a subject. The optical image is converted into an electrical signal by a photographing element 13 such as a COD provided on the focal plane of the photographing lens 12. This electrical signal is converted into a predetermined video signal by the video circuit 14 and transmitted to a camera terminal 16 provided on the bottom surface of the camera body 110. The camera body 11 has a concave portion 16 on the bottom surface, and a convex portion 1 on the top surface of the rotating plate 1a.
8 is engaged. The rotary plate 17 is rotatably supported by a ball bearing 2o press-fitted into the intermediate plate 19 about approximately the center of gravity of the camera body 11 and the rotary plate 17. Back plate 2 made of magnetic material
A ring-shaped magnet 22, which has been magnetized as required, is bonded through the magnet 1. 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. A rotating plate terminal 25 that can come into contact with the camera terminal 15 is provided at the center of the convex portion 18 of the rotating plate 17, and can transmit video signals and the like supplied to the camera terminal 15. moreover,
A predetermined magnetized ring-shaped magnet 27 is adhered to the right side of the intermediate plate 19 via a back plate 2θ made of a magnetic material, and a fixed 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 the child flat plate 29 interposed therebetween. Intermediate plate 19
It has a shaft part 31 on the right side of the camera body 11 and the rotating plate 17 by a ball bearing 32 press-fitted into the fixed plate 28.
The intermediate plate 19 is rotatably supported approximately at the center of gravity between the intermediate plate 19 and the intermediate plate 19 . Note that the intermediate plate 19 has a magnet 27
Due to the suction force between the stator plate 29 and the stator flat plate 29, it is stably held without falling off.

The fixing plate 28 has a recess 33 on the right side and engages with a protrusion 36 on the left side 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. Also, the moving plate 17. The intermediate plate 19 and the fixed plate 28 have through holes 38, 39, and 40, respectively, through which lead wires are passed. A finder mounting bracket 41 is mounted on the top surface of the hand grip 34.
A viewfinder 42 for checking the video signal is fixed. Also hand grip 3
4 is provided with a zoom switch 43 for electrically zooming the photographing lens 12, a VTR connection terminal 44, and a recording switch 45 for controlling the recording operation of the connected VTR. FIG. 2 is a block diagram showing the electrical connections of the servo system, etc. The control circuit 46 built in the intermediate plate 19 is connected to the angular velocity sensor 4 provided on the rotating plate 17.
7 is connected, and drives an actuator 48 constituted by a magnet 22, a stator winding 24, etc. in accordance with a signal from an angular velocity sensor 47. Angular velocity sensor 47
is for detecting 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 reducing camera shake in the horizontal direction. can be done. 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 3o, etc. in response to a signal from an angular velocity sensor SO provided on the intermediate plate. Angular velocity sensor 60
Detects the camera shake in the pitching direction as it rotates in the vertical plane, and the control circuit 49 controls the actuator 61 so that the output of the angular velocity sensor 6o always approaches zero, thereby preventing camera shake in the vertical direction. It can be reduced.

The power supply 62 supplied to the VTR connection terminal 44 is connected to the grip terminal 37. It is supplied to the intermediate plate 19 via the fixed plate terminal 36, and is further supplied to the rotating plate terminal 2 via the through holes 38, 39, 40.
5. It is supplied to the camera body 11 via the camera terminal 16.

Next, the pre-key mechanism for increasing the rotational load will be explained. First, as the yawing direction, the intermediate plate 1
A brake solenoid 63 is fixed to 9, and a brake shoe 64 is provided at the tip of the solenoid 63 so as to be able to come into contact with the outer periphery of the rotary plate 1. Further, a Hall element 65 is attached to the central space of the fixed winding 24, and by detecting the magnetized state of the magnet 220, the rotation angle of the actuator 48 can be detected. The Hall element 66 is connected to the brake control circuit 56 and is configured to drive the solenoid 63 in accordance with the output of the Hall element 65. The pitching direction is also the same, the brake solenoid 67 is attached to the fixed plate 28, and the brake shoe 68 is attached to the intermediate plate 19.
It is provided so as to be able to come into contact with the outer periphery of the. A Hall element 60 provided at the center of the stator winding 3o is connected to the brake control circuit 59.

The operation of the photographing apparatus configured as described above will be explained below. First, in normal shooting conditions, the angular velocity sensor 4
7.50 detects camera shake in the horizontal and vertical directions, the control circuit 46 drives the actuator 48, the control circuit 49 drives the actuator 51, and controls the output of the angular velocity sensor 47.60 so that it always approaches zero. Even if the handgrip 34 held in the hand shakes due to camera shake or the like, the camera body 11 will not shake and a stable image can be taken. Video can be recorded.

Next, when fast panning photography is performed, the directions of the hand grip 34 and the camera body 11 are greatly different, and this is detected by the Hall element 66, and the brake control circuit 5
6 drives the brake solenoid 63 and controls to increase the rotational load on the actuator 48.

Therefore, the response during panning photography can be improved. Further, the operation in the pitching direction is also similar.

Effects of the Invention As described above, 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 rotates the two camera bodies in the yawing direction (or pitching direction). a rotation means for rotating the rotation means; a detection means for detecting a rotation range of the rotation means; and a load applied to the rotation means when the detection means detects that the rotation means has rotated by a predetermined amount or more. By providing a control means for controlling the camera to increase the number of images, it is possible to improve the responsiveness of vanning photography and the like.

[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... Actuator, 63...
... Solenoid, 66 ... Hall element, 6
6... Brake control circuit, 57... Solenoid, 59... Brake control circuit, 60...
·····Hall element.

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 rotation means for rotating the camera body in a yawing direction (or a pitching direction), and a rotation means for rotating the camera body in a yawing direction (or pitching direction). a detection means for detecting a rotation range; and a control means for controlling to increase a load applied to the rotation means when the detection means detects that the rotation means has rotated by a predetermined amount or more. A photographic device characterized by: