JPH0573106B2 - - 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.

2. Description of the Related Art In recent years, with the spread of video tape recorders, there are many opportunities to take pictures using a video camera, and there is a demand for a video camera that can perform stable camera work with less image blur.

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 directional dial and the vertical dial at high speed, the video camera 9 remains stable even when shooting in a shaking state.
It is possible to obtain captured images with less blur.

Problems to be Solved by the Invention However, in the above configuration, since a gyro that constantly rotates at high speed is used, there are problems in that the device becomes large and heavy, and consumes a large amount of power.

In view of the above problems, the present invention provides a photographing device that is small, lightweight, and consumes little power.

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 detection means for detecting camera shake in a yawing direction (or pitching direction); a correction means for correcting the camera shake by rotating the camera body in a direction in which a detection signal from the detection means is reduced; and a correction means for correcting the camera shake. a locking means for locking the correction function of the camera from operating; a holding means for holding the camera body and the correction means; a detection means for detecting that the holding means is fixed to the fixing means; and control means for controlling the locking means to lock the correction means when it is detected that the holding means is fixed to the fixing means.

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 the photographer can use it hand-held. When fixed on a tripod or the like, power consumption can be reduced by locking the rotating means to prevent image blurring.

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
The image sensor 13, such as a CCD, provided on the focal plane of the photographic lens 12 converts the signal into an electrical signal. This electrical 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. The rotating plate 17 is
It is rotatably supported by a ball bearing 20 press-fitted into the intermediate plate 19, and on the lower surface of the rotating plate 17, a ring-shaped ring which is magnetized as required is attached to the lower surface of the rotating plate 17 via a back plate 21 made of a magnetic material. A magnet 22 is attached. 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 be contacted with the camera terminal 15 is provided at the center of the convex portion 18 of the rotating plate 17.
A video signal etc. supplied to the camera terminal 15 can be transmitted. Furthermore, on the right side of the intermediate plate 19, a back plate 26 made of a magnetic material is provided.
A ring-shaped magnet 27 that has been magnetized in a predetermined manner.
A stator winding 30 is bonded to the left side of the fixed plate 28 at a position facing the magnet 27 via a stator flat plate 29 made of a magnetic material.
The right side of the intermediate plate 19 has a shaft portion 31,
It is rotatably supported by a ball bearing 32 press-fitted into the fixed plate 28. Note that the intermediate plate 19 is stably held by the attraction force between the magnet 27 and the stator flat plate 29 without falling off.

The fixing plate 28 has a recess 33 on its right side, which engages with a protrusion 35 on the left side of a handgrip 34 provided as a holding means. Further, 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. In addition, the rotating plate 17, the intermediate plate 19, and the fixed plate 28 have through holes 38 and 3 for passing lead wires, respectively.
It has 9.40. 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. In addition, hand grip 34
includes a zoom switch 43 for electrically zooming the photographic lens 12, and a VTR connection terminal 4.
4. A recording switch 45 is provided to control the recording operation of the connected 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 rotating plate 17.
An angular velocity sensor 47 provided at the angular velocity sensor 47 is connected as a detection means, and an actuator 48 constituted by the magnet 22, stator winding 24, etc. is driven in accordance with the signal from the angular velocity sensor 47. The angular velocity sensor 47 detects camera shake in the yawing direction when rotating in a horizontal plane, and the control circuit 4 is configured so that the output of the angular velocity sensor 47 always approaches zero.
6 controls the actuator 48,
Can reduce horizontal camera shake,
It constitutes a correction means. 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.

Next, the lock means will be explained. First, a self-holding solenoid 53 is fixed to the intermediate plate 19 as a locking means in the yawing direction.
A brake shoe 54 is installed at the tip of the solenoid 53.
is provided so as to be able to come into contact with the outer periphery of the rotating plate 17 by a compression spring 55. In addition, stator winding 2
A Hall element 56 is attached to the central space of the actuator 48, and by detecting the magnetized state of the magnet 22, the intermediate position of the rotation range of the actuator 48 can be detected. The Hall element 56 is connected to a solenoid control circuit 57, and the solenoid control circuit 57 is activated when a fixed detection switch 64, which is provided as a detection means for detecting that a tripod is attached to a tripod mounting screw 58 provided at the bottom of the hand grip 34, is turned on. After the actuator 48 is rotated to approximately the middle position of the rotation range by a control circuit 46 provided as a control means, the solenoid 53 is energized. The locking mechanism in the pitching direction is also the same, and the solenoid 5
9 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 Hall element 63, a fixed detection switch 64, and a fixed detection switch 64 provided in the central space of the stator winding 30.
A control circuit 49 is connected.

The operation of the photographing apparatus configured as described above will be explained below. First, if you want to hold the hand grip 34 by hand and take pictures, use the tripod mounting screw 58.
Since the tripod is not attached to the camera, the fixed detection switch 64 is off, and the actuator
8 and 51 are not locked, and the camera body is rotatably supported. Therefore, the angular velocity sensor 47,
50 detects camera shake in the horizontal and vertical directions, and the control circuit 46 detects the actuator 48.
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 can be maintained even if the hand grip 34 held in the hand shakes due to camera shake or the like. It is possible to shoot stable images without shaking, and the VTR connected to the VTR connection terminal 44
This video can be recorded (not shown).

Next, when a camera fixing means such as a tripod is attached to the tripod mounting screw 58, the fixation detection switch 64
turns on and detects this, the solenoid control circuit 57 drives the actuator 48 in the yawing direction via the control circuit 46, rotates the actuator 48 to approximately the middle position of the rotation range, and then turns on the solenoid 53. The actuator 48 is locked by energizing, releasing the self-holding of the solenoid 53, and pressing the brake shoe 54 against the outer periphery of the rotary plate 17 by the compression spring 55. Note that the solenoid control circuit 57 is configured to also cut off the drive power for the actuator 48 in conjunction with this locking operation. The operation in the pitching direction is also similar, and the explanation will be omitted. As mentioned above, when mounted on a tripod, the drive power to the actuator is cut off and locked, so there is little image blurring even when panning, etc., and you can perform reliable camera work. Electricity can also be saved.

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 shake in the yawing direction (or pitching direction) of the camera body. a detection means for detecting the camera shake; a correction means for correcting the camera shake by rotating the camera body in a direction in which a detection signal from the detection means is reduced; and a lock for locking the correction function of the correction means from operating. a holding means for holding the camera body and the correction means; a detection means for detecting that the holding means is fixed to the fixing means; and a detection means for fixing the holding means to the fixing means by the detection means. By including a control means for controlling the locking means to lock the rotation means when the rotation means is detected, the structure can be made small and lightweight, and consumes less power. Both have the effect of reducing image blur and making camera work easier.

[Brief explanation of drawings]

Fig. 1 is a block diagram of 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, 43... Hand grip, 48... Actuator, 51... Actuator, 53... Solenoid, 57... Solenoid control circuit, 58... Tripod mounting screw, 59... Solenoid, 62... Solenoid control Circuit, 64...
…Fixed detection switch.

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 detection means for detecting camera shake in the yawing direction (or pitching direction) of the camera body, and the detection means. a correction means for correcting the camera shake by rotating the camera body in a direction in which a detection signal is reduced; a locking means for locking the correction function of the correction means from operating; and the camera body and the correction means. a holding means for holding the holding means; a detecting means for detecting that the holding means is fixed to the fixing means; and a locking means for locking when the detecting means detects that the holding means is fixed to the fixing means. A photographing device comprising: a control means for controlling the correction means so as to lock the correction means.