JPH0545111B2 - - 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 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, 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 mobility, even if the weight of the entire device is made so that it can be held in hand, it is possible to turn off image blur prevention means such as a gyroscope when it is not necessary to prevent image blur.
Since the video camera was placed in an unstable condition, there was a problem that it was difficult to determine the direction of the video camera when shooting.

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 correction means for correcting camera shake in the yawing direction (or pitching direction) within a predetermined range; a detection means for detecting that the correction means is at a substantially intermediate position of the shake correction range; and a correction means for the correction means. A locking means for locking the function so that it does not operate, an operating means for operating the locking means, and a detecting means for detecting that the correcting means has come to approximately the middle position of the blur correction range, and for controlling the operation. and control means for controlling the locking means to lock the rotation means when the means is operated.

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 and rotate it. Since it is possible to lock at the middle position of the range, it is easier to determine the direction of the video camera even when image stabilization is not being performed, and there is less screen movement when transitioning from the image stabilization state to locking the image stabilization. This allows for improved operability, such as natural switching.

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 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. 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 by the attraction force between the magnet 27 and the stator flat plate 29 without falling off.

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 includes a zoom switch 43 for electrically zooming the photographic lens 12, a VTR connection terminal 44, and a recording switch 45 for controlling the recording operation of the connected VTR.
is provided. 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 47 provided on the rotating plate 17.
magnet 22 and stator winding 2 according to the signal of 7.
4, etc., is driven. It detects camera shake in the yawing direction when the angular velocity sensor 47 is rotated 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 detecting camera shake in the horizontal direction. can be reduced. Similarly, a control circuit 49 is built into the fixed plate 28, and an actuator 51 composed of the magnet 27, stator winding 30, etc.
is driving. 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.
By controlling the vertical camera shake, vertical camera 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.
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, it is possible to detect an intermediate position in the rotation range of the actuator 48. The Hall element 56 is connected to a solenoid control circuit 57, and the solenoid control circuit 57 operates the yawing lock switch 58, and when the Hall element 56 detects that the actuator 48 is at approximately the middle position of the rotation range, The solenoid 53 is configured to be energized. 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 circumference of the intermediate plate 19 by means of a compression spring 61. The solenoid control circuit 62 is connected to a Hall element 63 provided in the central space of the stator winding 30 and a pitting lock switch 64.

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 shooting using a tripod etc.
If there is no need to prevent image blur, use the yawing lock switch 58 and the pitching lock switch 6.
Operate 4. When the yawing lock switch 58 is operated, if the Hall element 56 detects that the actuator 48 is at approximately the middle position of the rotation range, the solenoid control circuit 57 energizes the solenoid 53 to close the solenoid. The actuator 48 is locked by releasing the self-holding of the actuator 53 and pressing the brake shoe 54 against the outer periphery of the rotary plate 17 by the compression spring 55. Incidentally, in conjunction with this locking operation, the drive power for the actuator 48 is also cut off. (Not shown) When the yawing lock switch 58 is operated, if the actuator 48 is not at the middle position of the rotation range, it will not lock immediately and may come to the middle of the rotation range due to camera shake during shooting. locks when
When locked, the camera can always be held in the middle position of the rotation range. The operation in the pitching direction is similar, and the explanation will be omitted.

By interlocking the yawing lock switch 58 and the pitching lock switch 64,
It is also possible to lock both axes by operation.

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 correction means for correcting within a predetermined range;
a detecting means for detecting that the correcting means is at a substantially intermediate position of the blur correction range; a locking means for locking the correction function of the correcting means from operating; an operating means for operating the locking means; control means for controlling the locking means to lock the correction means when the detection means detects that the correction means has come to a substantially intermediate position of the blur correction range and the operation means is operated; This feature makes it easier to determine the direction of the video camera even when image stabilization is not used, and reduces sudden screen changes when transitioning from image stabilization mode to locking image stabilization, making it easier to shoot. It is possible to improve operability by allowing mode transition while

[Brief explanation of the drawing]

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. 11... Camera body, 48... Actuator, 51... Actuator, 53... Solenoid, 56... Hall element, 57... Solenoid control circuit, 58... Yawing lock switch, 5
9... Solenoid, 62... Solenoid control circuit, 63... Hall element, 64... Pitting lock 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, and a correction means for correcting camera shake in the yawing direction (or pitching direction) of the camera body within a predetermined range. a detection means for detecting that the correction means is at a substantially intermediate position of the blur correction range; a locking means for locking the correction function of the correction means from operating; and an operation means for operating the locking means. a control means for controlling the locking means to lock the correction means when the detection means detects that the correction means is at a substantially intermediate position of the blur correction range and the operation means is operated; A photographing device characterized by comprising: