JPH01123576A - Photographing device - Google Patents

Abstract

PURPOSE:To scale down and lighten a photographing device by constituting a movement supporting means made by a magnetic material, which movably supports a means holding an image pickup lens and a photoelectrical converting means in a body, and a driving means in a body. CONSTITUTION:The image pickup lens 21 and an image pickup element 22 are held by a lens mirror barrel 23 and an electric signal converted from an optical image by the element 22 is converted to a prescribed video signal by a video circuit 24. Ball bearings 25 and 26 are respectively press-fitted to the upper part 23a and the bottom part 23b of the barrel 23 and a movable axis 28 is set to the bottom part of the first frame 27 made by the magnetic material and movably engaged to the ball bearing 26. Besides, as a screw part is provided to the upper part of the first frame 27 and this screw part and the screw part of the movable axis 29 are screwed and movably engaged to the ball bearing 25, the barrel 23 is movable in a yawing direction for the fram 27. Thus, the whole photographing device can be scaled down and lightened.

Description

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

Conventional technology In recent years, with the spread of video tape recorders (hereinafter referred to as VTRs), there are more opportunities to use video cameras to take pictures, and it is now possible to perform stable camera work with less blurring without using a tripod. A video camera is required.

An example of the above-mentioned conventional photographing device will be described below with reference to the drawings. Conventionally, this type of photographing apparatus has had a structure as shown in FIGS. 5 and 6, as shown in, for example, Japanese Patent Application Publication No. 53-64175. FIG. 5 is a front view of a conventional photographing device, and FIG. 6 is a side view. Fifth
In Fig. 6, there is a rotor case 1 which houses a rotor that rotates at high speed in the center as a directional gyro.
This is supported by a horizontal gimbal 3 with left and right horizontal axes 2, and the horizontal gimbal 3 is further supported by a vertical gimbal 5 with left and right gimbal axes 4. Similar to the vertical gyromo, the rotor case 6 at the center 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.

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 normally the entire device must be installed and used. In addition to the problem of lack of mobility, if you are shooting hand-held and there is no need to prevent image blur, you can stop the image blur prevention means such as a gyro, but As a result, the gyroscopic effect is lost and the stability of the horizontal gimbal 3.7 and the vertical gimbal 5.8 is lost, causing the video camera to become unstable, making it difficult to determine the direction in which to shoot.

Means for Solving the Problems In order to solve the above problems, the present invention provides a photographing lens that takes an optical image of a subject, a photoelectric conversion means that converts the optical image from the photographing lens into an electrical signal, and a photographing lens. a holding means for integrally holding the holding means and the photoelectric conversion means; a rotating support means made of a magnetic material for rotatably supporting the holding means in a pitching direction or a yawing direction; and a rotating support means for driving the holding means in a pitching direction or a yawing direction. a driving means for
A part of the drive means is integrally formed with the rotation support means.

Effects The present invention does not use a large and heavy gyro as in the prior art due to the above-described configuration, so it can be easily constructed to be small and lightweight, and can be used hand-held by the photographer.

Further, since the rotation support means is made of a magnetic material and is integrated with a part of the drive means, the number of parts and cost can be reduced.

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 entire imaging device, Fig. 2 is a sectional view taken along the line XX in Fig. 1, Fig. 3 is a perspective view of the first frame, and Fig. 4 is a sectional view of the second embodiment. be.

First, the overall configuration of the photographing device will be explained with reference to FIGS. 1, 2, and 3.

In FIGS. 1 and 2, a photographic lens 21 for photographing a subject and an image sensor 22 such as a CCD provided on the focal plane of the photographic lens are held by a lens barrel 23. Further, the video circuit 24 converts the electrical signal converted from the optical image by the image sensor 22 into a predetermined video signal. Ball bearings 25 and 26 are press-fitted into the upper part 23a and lower part 23b of the lens barrel 23, respectively, and a rotating shaft 28 is implanted in the lower part of the first frame 27 made of magnetic material.
It is rotatably fitted to the Also, the first frame 27
A threaded part is provided on the upper part of the lens barrel 23, and this threaded part and the threaded part of the rotation shaft 29 are screwed together and rotatably fitted to the ball bearing 25. It is freely rotatable in the yawing direction.

Further, a ring-shaped magnet 31 which is magnetized as required is fixed to the lower part 23b of the lens barrel 23 via a back plate 30 made of a magnetic material. A printed board (not shown) having wiring provided on its surface and having a stator winding vA 32 adhered thereto is fixed to the first frame 27 facing the magnet 31. The shape of this portion of the first frame 27 is circular, which is larger than the outer diameter of the magnet 31.

Further, in order to detect the rotational position of the lens barrel 23, a Hall element 33 is provided on a printed board (not shown) that is fixed to the first frame 27 facing the magnet 31. Ball bearings 34a and 35a held by ball bearing holders 34 and 35 are fixed to the left and right sides of the first frame 27 (from the rear of the lens barrel 23 toward the subject), respectively. A rotation shaft 37 installed on the right side of the shaft is rotatably fitted into a ball bearing 35a. Further, a threaded portion is provided on the left side of the second frame 36, and this threaded portion and the threaded portion of the rotation shaft 38 are screwed together and the ball bearing 34a
The lens barrel 23 and the first
The frame 27 is rotatable in the pitching direction with respect to the second frame 36. In addition, a ring-shaped magnet 40 with required magnetization is fixed on the right side of the first frame 27, and a second frame 36 facing this magnet 40 has wiring on its surface and is fixed. A printed board (not shown) on which the child winding 41 is attached is fixed. The shape of the right side of the first frame 27 is approximately the same as that of the magnet 40.

In addition, a magnet 40 is used to detect the rotational position of the first frame 27 and the lens barrel 23 in the tilting direction.
A Hall element 42 is provided on a printed board (not shown) that is fixed to the second frame 36 and faces the second frame 36 . An angular velocity sensor 43 for detecting the angular velocity in the panning direction is fixed to the lens barrel 23, and an angular velocity sensor 43 for detecting the angular velocity of the lens barrel 23 in the tilting direction is fixed to the first frame 27. 44 is fixed. In order to make the output signals of the angular velocity sensors 43 and 44 zero, the control circuit 45 operates an actuator 46 consisting of a magnet 31, a stator winding 33, etc. that rotates the lens barrel 23 in the panning direction, and an actuator 46 that rotates the lens barrel 23 in the panning direction. An actuator 47 consisting of a magnet 40 and a stator winding 42 that rotates the first frame 27 in the tilting direction is driven and controlled.

When locking the lens barrel 23 so that it does not rotate, the control circuit 45 is activated by turning on the lock switch 50.
Electric power is supplied to the motor 52 fixed to the lock base 51, and the motor 52 rotates. An idler gear 53.5 provided on the lock base 51 uses the rotational force of this motor 52.
The signal is transmitted to a lock gear 56 provided on a lock shaft 55 via a speed reduction mechanism consisting of 4. The lock shaft 55 is connected to the support member 5
The cam groove 57a provided in the support member 57 is slidably engaged with the cam pin 5 provided in the lock shaft 55.
5a to guide the movement of the lock shaft 55.

The end of the lock shaft 55 has a spherical shape, and by coming into contact with a conical recess 58 provided at the rear of the lens barrel 23, the optical axis of the lens barrel 23 and the photographing axis of the camera body are aligned. Lock the lens barrel 23 in this manner. A conical recess 58 provided at the rear of the lens barrel 23 is sized so as to come into contact with the lock shaft 55 within the rotation range of the lens barrel 23.

The control circuit 45 also includes a power outage detection section (not shown) that detects a power outage, and a capacitor (not shown) that stores electricity when power is being supplied from the VTR main body or the like. In the event of a power outage, the power outage detection section in the control circuit 45 detects the power outage and supplies the electricity stored in the capacitor to the motor 52 to rotate the motor 52, transmitting the rotational force to the lock shaft 55 and Lens barrel 2
Lock 3.

The operation of the photographing apparatus configured as described above will be described below with reference to FIGS. 1 and 2.

When hand-held shooting is performed with a video camera, the camera shakes due to camera shake or fatigue, resulting in shaking of the shot image (so-called image blur). The shaking of the lens barrel 23 accompanying this video camera is detected by the angular velocity sensor 43 (panning direction).
, 44 (tilting direction), and the control circuit 45 controls the stator winding 32.41 of the actuator 46.47 by supplying power so that the output from the angular velocity sensor 43.44 becomes zero. This eliminates the shaking of the lens barrel 23 with respect to the absolute coordinates, making it possible to reduce image blur in the horizontal and vertical directions. For example, if the lens barrel 23 shakes in the tilting direction (arrow ■ direction in FIG. Image blur in the tilting direction can be prevented by supplying power to the stator winding 41 and controlling its drive in the direction opposite to the direction of arrow (2). Image blur can be similarly prevented in the panning direction. If image blurring occurs in the diagonal direction, the amount of shaking (angular velocity) is detected by the angular velocity sensor 43 (panning direction) and angular velocity sensor 44 (tilting direction), and the angular velocity sensors 43 and 44 in both directions detect the amount of shaking. By supplying power to the stator windings 32, 41 of the actuators 46, 47 by the control circuit 45 so that the output becomes zero, it is possible to prevent image blurring in the diagonal direction.

When carrying the camera or turning off the image stabilization effect,
When the lock switch 50 is turned on, the control circuit 45 supplies power to the motor 52 to rotate the motor 52. The rotational force of the motor 52 is transferred to the idler gear 53.5
The cam pin 5 provided on the lock shaft 55 is transmitted to the lock gear 56 provided on the lock shaft 55 through a reduction mechanism consisting of 4.
5a, the lock shaft 55 is moved in the optical axis direction (arrow H direction) using the cam groove 57a of the support member 57 as a guide, and the lock shaft 55 is inserted into the conical recess 58 provided at the rear of the lens barrel 23.
The lens barrel 23 is locked so that the optical axis of the lens barrel 23 and the photographing axis of the camera body with respect to the subject coincide with each other. When the lock is completed, the control circuit 45 activates the actuator 46.
47 and the motor 52.

Further, when turning on the image blur prevention effect, when the lock switch 50 is turned off, the control circuit 45 first supplies power to the motor 52 to rotate the motor 52. The rotational force of the motor 52 is transmitted to the lock gear 56 provided on the lock shaft 55 via a reduction mechanism consisting of idler gears 53 and 54, and the cam pin 55a provided on the lock shaft 55 is transmitted to the lock gear 56 provided on the lock shaft 55.
The lock shaft 55 is moved in the optical axis direction (in the direction opposite to the arrow H) using the cam groove 57a of the support member 57 as a guide, and a conical recess 5 is formed at the rear of the lock shaft 55 and the lens barrel 23.
8 and the lens barrel 23 is placed in an unlocked state. The control circuit 45 then controls the actuators 46, 47
Power is supplied to the camera to prevent image blurring.

The control circuit 45 also includes a power outage detection unit (
(not shown) and a capacitor (not shown) that stores electricity when power is being supplied from the VTR main unit, etc. In the event of a power outage, a power outage detection section in the control circuit 45 detects the power outage and the capacitor is rotates the motor 52 by supplying electricity stored in the motor 52 to the motor 52;
The rotational force is transmitted to the lock shaft 55 to lock the lens barrel 23.

As described above, according to this embodiment, the photographic lens that photographs an optical image of a subject, the photoelectric conversion means that converts the optical image from the photographic lens into an electrical signal, and the photographic lens and the photoelectric conversion means are integrally integrated. A holding means for holding the holding means, a rotating support means made of a magnetic material for rotatably supporting the holding means in the pitching direction or the yawing direction, a driving means for driving the holding means in the pitching direction or the yawing direction, and one of the driving means. By configuring the part integrally with the rotary support means, the entire photographing device becomes small and lightweight, and hand-held photographing can be easily carried out. Further, since the first frame and the second frame are made of plates made of magnetic material and are part of the actuator, the number of parts and cost can be reduced.

By locking, the photographing axis of the camera body and the optical axis of the photographing lens coincide, so that even after the lock is locked, it is possible to take photographs without any discomfort. Furthermore, in the event of a power outage to the camera body, for example, if the connector of the cable that supplies power from the VTR to the camera body is disconnected, the lens barrel will become unstable inside the camera body. By storing power in a capacitor or the like in the control circuit, power can be supplied to the motor that drives the locking means to lock the lens, so even in the event of a power outage, the lens barrel is fixed to the camera body and the lens barrel does not come in contact with the exterior, etc. You can carry it with peace of mind without having to touch it.

In this example, a magnet is fixed to the lower part of the lens barrel via a back plate made of magnetic material, and a stator winding is provided on the first frame opposite to this magnet. As shown in the figure, a stator winding fixed to a flat stator plate made of magnetic material may be provided at the bottom of the lens barrel, and a magnet fixed to a back plate made of magnetic material may be provided to the first frame opposite to it. good.

In addition, the stator windings are fixed to the frame after being bonded to a printed board with wiring, but the wiring is etched into the frame itself through an insulating layer (so-called iron board).
The stator winding may be fixed. Furthermore, although the ball bearing is fixed to the frame after press-fitting with a ball bearing holder, it may also be fixed directly into the hole of the frame by press-fitting or gluing by using a flanged ball bearing or the like.

Furthermore, a capacitor installed in the control circuit stores electricity during a power outage, but instead of using a capacitor, any device that stores electricity can be used. For example, batteries etc.

Effects of the Invention As described above, there is provided a photographic lens for photographing an optical image of a subject, a photoelectric conversion means for converting the optical image from the photographic lens into an electrical signal, and a holder for integrally holding the photographic lens and the photoelectric conversion means. a rotating support means made of a magnetic material that rotatably supports the holding means in the pitching direction or the yawing direction; a driving means for driving the holding means in the pitching direction or the yawing direction; and a rotating part of the driving means. Since it is integrated with the dynamic support means, the entire photographing device becomes small and lightweight, and it is possible to easily carry out hand-held photographing.

Further, since the first frame and the second frame are made of plates made of magnetic material and are part of the actuator, the number of parts and cost can be reduced. By locking, the photographing axis of the camera body and the optical axis of the photographing lens coincide, so that even after the lock is locked, it is possible to take photographs without any discomfort. Furthermore, in the event of a power outage to the camera body, for example, if the connector of the cable that supplies power from the VTR to the camera body is disconnected, the lens barrel will become unstable inside the camera body. By storing power in a capacitor or the like in the control circuit, power can be supplied to the motor that drives the locking means to lock the lens, so even in the event of a power outage, the lens barrel is fixed to the camera body and the lens barrel does not come in contact with the exterior, etc. You can carry it with peace of mind without having to touch it.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a photographing device in an embodiment of the present invention;
Fig. 2 is a sectional view taken along line XX in Fig. 1, Fig. 3 is a perspective view of the first frame, Fig. 4 is a sectional view of the second embodiment, and Fig. 5 is a conventional photographing method. The front view of the device, FIG. 6, is a side view of a conventional photographing device. 21...Photographing lens, 22...CCD
, 23. Old lens barrel, 27... First frame, 36... Second frame, 31.40
...Magnet, 31.41...Stator winding, 43.44...Angular velocity sensor, 45
...control circuit. Name of agent: Patent attorney Toshio Nakao Haka1 person 22・-C
CD n-lens n, body 6/-M wholesale circuit Figure 3 Figure 4

Claims (3)

[Claims] (1) A photographic lens for photographing an optical image of a subject, a photoelectric conversion means for converting the optical image from the photographic lens into an electrical signal, and a holding means for integrally holding the photographic lens and the photoelectric conversion means. , a rotating support means made of a magnetic material that rotatably supports the holding means in the pitching direction or the yawing direction, a driving means for driving the holding means in the pitching direction or the yawing direction, and a part of the driving means. A photographing device characterized in that it is configured integrally with the rotation support means. (2) Claims in which the driving means consists of a rotor that rotates integrally with the holding means, and a stator winding fixed to rotation support means made of a magnetic material and provided opposite to the rotor. No. (
The photographing device described in section 1). (3) The drive means is characterized by comprising a stator winding that rotates integrally with the holding means, and a rotor fixed to a rotation support means made of a magnetic material so as to face the stator winding. An imaging device according to claim (1).