JPS63299579A - Photographing device - Google Patents

Abstract

PURPOSE:To allow a phtographer to use a photographing device to use by hand, by composing the holding means of a photographing lens and a photoelectric conversion means of a resin magnet with which a magnetic part is provided, making the photographing device miniaturized and lightweight. CONSTITUTION:The photographing device is composed of the holding means 23 integrally holding the photographing lens 21 which photographs an object and the photoelectric conversion means 22 which converts an optical image from the photographing lens 21 into an electric signal and consisting of the resin magnet with which the magnetic part 23c is provided, a rotation supporting means 30 freely supporting the rotation of the holding means 23 in a panning direction or in a pitching direction and a stator winding 31 fixed to the rotation supporting means 30 being at the opposite position of the magnetic part 23c. Thus the whole photographing device can be composed in miniaturization light weight. Besides, the photographer can use it by hand and the cost of it is also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a photographing device such as a video camera. In recent years, with the spread of video tape recorders (hereinafter referred to as VTRs), opportunities to use video cameras to take pictures have increased, and video cameras that allow stable camera work with less image blur without using a tripod. is requested.

2. Description of the Related Art Hereinafter, an example of the above-mentioned conventional photographing device will be described with reference to the drawings. Conventionally, this type of photographing device has been disclosed, for example, in Japanese Unexamined Patent Publication No. 53-64175,
The structure was as shown in Figures 3 and 4. Figure 3 shows
A front view of a conventional photographing device, and FIG. 4 is a side view. In FIGS. 3 and 4, there is a low case 1 which has a built-in rotor that rotates at high speed in the center as a directional gyro, and this is supported by a horizontal gimbal 3 with left and right horizontal axes 2.
Furthermore, the horizontal gimbal 3 has the left and right gimbal axes 4 vertical ff
l, ; supported by 5 members. Similarly, in the case of the vertical gyro, 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. The problem was that it lacked maneuverability. In addition, 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. There was a problem in that it was difficult to determine the shooting direction.

Means for Solving the Problems In order to solve the above problems, the present invention provides a photographic lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a combination of the photographic lens and the photoelectric conversion. a holding means made of a resin magnet that integrally holds the holding means and is provided with a magnetized portion that is magnetized in a predetermined manner; and a rotation support that rotatably supports the holding means so as to be rotatable in the panning direction or the pitching direction. and a stator winding fixed to the rotation support means at a position facing the magnetized portion.

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 a photographer. In addition, by forming a part of the lens barrel with a resin magnet, by applying a predetermined magnetization to a part of the lens barrel, an actuator and a lens barrel that drive the lens barrel in the panning direction or pitching direction can be connected. can be integrally configured. Therefore, it is possible to improve the assemblability of the actuator that drives the lens barrel in the panning direction or the pitching direction, and to reduce the number of parts.

Embodiment Hereinafter, a photographing apparatus according to an embodiment of the present invention will be described with reference to the drawings. Figure 1 is a configuration diagram of the entire photographing device.
FIG. 2 is a sectional view taken along line XX in FIG. 1.

First, the overall configuration of the t-most shadow device will be explained with reference to FIGS. 1 and 2.

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 in a lens barrel 23.

Further, the electrical signal converted from the optical image by the image sensor 22 is converted into a predetermined video signal by the video mustache 24.

Ball bearings 25 and 26 are press-fitted into the upper part 23a and lower part 23b of the lens barrel 23, respectively, and the first frame 2
Rotating shafts 2B and 29 from the top and bottom of 7 are ball bearings 25.
The lens barrel 23 is rotatably fitted to the first frame 26 , and the lens barrel 23 is rotatably fitted to the first frame 27 . Here, the lower part 23c of the lens barrel 23 is magnetized in a predetermined manner. A stator winding 31 is fixed to the lower part 27a of the first frame 27 at a position facing the magnetized portion 23c of the lens barrel 23 and is bonded to a stator flat plate 30 made of a magnetic material.

Further, in order to detect the rotational position of the lens barrel 23, the stator flat plate 3 is placed opposite the magnetized portion 23c of the lens barrel 23.
A Hall element 30a is provided at 0. Ball bearings 32 and 33 are press-fitted into the left and right sides of the first frame 27, respectively, and rotating wheels 35 and 36 are rotatably fitted into the ball bearings 32 and 33 from the left and right sides of the second frame 34, respectively. The cage lens barrel 23 and the first frame 27 are rotatable relative to the second frame 34. Also, the first
On the right side of the frame 27 is a stator flat plate 37 made of magnetic material.
A stator winding 38 glued to is fixed. A ring-shaped magnet 4 is mounted on a back plate 39 made of a magnetic material on the second frame 34 facing the stator [138].
0 is attached, and the magnet 40 is magnetized in a predetermined manner. Further, in order to detect the rotational position of the first frame 27 and the lens barrel 23 in the pitching direction,
A Hall element 37a is provided on the stator flat plate 37 facing the magnet 40. The lens barrel 23 includes an angular velocity sensor 4 for detecting angular velocity in the panning direction.
1 is fixed, and an angular velocity sensor 42 for detecting the angular velocity of the lens barrel 23 and the first frame 27 in the pitching direction is fixed to the first frame 27. In order to make the output signals of the angular velocity sensors 41 and 42 zero, the control circuit 43 operates an actuator 44 consisting of a magnetized portion 23c of the lens barrel 23, a stator winding 31, etc., which rotates the lens barrel 23 in the panning direction. and,
Stator winding 38 and magnet 40 that rotate the lens barrel 23 and first frame 27 in the pitching direction
The actuator 45 is driven and controlled.

To lock the lens barrel 23, press the lock switch 4.
6 is turned on, power is supplied from the control circuit 43 to the motor 48 fixed to the lock base 47, and the motor 48 rotates. The rotational power of this motor 48 is locked! The lock gear 5 is installed on the lock shaft 51 via a reduction mechanism consisting of an idler gear 49 and 50 installed on the lock shaft 51.
2. The lock shaft 52 is slidably engaged with a support member 53, and a cam groove 53a provided in the support member 53 engages with a cam pin 52a provided in the lock shaft 52 to prevent movement of the lock shaft 52. I'm guiding.

The end of the lock shaft 52 has a spherical shape, and locks the lens barrel 23 by coming into contact with a conical recess 54 provided at the rear of the lens barrel 23.

Here, if the lens barrel 23 has the function of focusing the optical image or changing the magnification, the lens barrel 23 has a focus for focusing the optical image of the subject in FIGS. 1 and 2. A lens (not shown), a zoom lens (not shown) for changing the magnification of an optical image, a taking lens (not shown) including a focus lens and a zoom lens, an aperture 55 for adjusting the amount of light from the taking lens, etc. There is. Furthermore, a focus ring gear 56 for focusing an optical image of a subject and a zoom ring gear 57 for varying the magnification of the optical image are provided on the outer circumference of the lens barrel 23. Further, the diaphragm 55 is attached to the flange 23d of the lens barrel 23. Moreover, three hollow cylinders 58, 59.
60 is formed. Here, the flange 23d is a hollow cylinder 58 for rotating the focus ring gear 56.
A predetermined magnetization is applied to the first magnetized portion 61 of.

Further, in order to rotate the zoom ring gear 57, a second magnetized portion 62 of the hollow cylinder 59 is magnetized to a predetermined value. Further, in order to operate the aperture 55, a third magnetized portion 63 of the hollow cylinder 60 is magnetized to a predetermined degree.

The first magnetized portion 61 also includes a focus ring gear 5.
6, a first motor shaft 64 is provided with a gear head on the part that meshes with the focus ring gear 56, and a first motor shaft 64 rotates integrally with the first motor shaft 64.
A rotor 65 is provided. The second magnetized portion 62 includes a second motor shaft 66 that is provided with a gear head at a portion that meshes with the zoom ring gear 57 in order to rotate the zoom ring gear 57, and a second motor shaft 66 that rotates integrally with the second motor shaft 66. A second rotor 67 is provided. Further, the third magnetized section 63 includes a third motor shaft 68 for driving the aperture 55, and a third motor shaft 68 for driving the aperture 55.
A third rotor 69 that rotates integrally with the rotor is disposed.

Here, the control circuit 43 operates a first motor 70 consisting of a first magnetized section 61, a first rotor 65, a brush (not shown) for supplying power to the first rotor 65, and a second a second motor 71 consisting of a magnetized section 62, a second rotor 67, a brush (not shown) for supplying power to the second rotor 67, and a third magnetized section 63. Third rotor 6
9 and a brush for supplying power to the third rotor 69 (
(not shown).

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 control circuit 43 detects the shaking of the lens barrel 23 caused by the video camera by the angular velocity sensors 41 (bending direction) and 42 (pitching direction), and controls the actuator 44 so that the outputs from the angular velocity sensors 41 and 42 become zero. By supplying and controlling tilI to the stator winding 31° 38 of .45, the shaking of the lens barrel 23 with respect to the absolute coordinates is eliminated, and image blur in the horizontal and vertical directions can be reduced.

For example, if the lens barrel 23 swings in the pitching direction (in the direction of arrow 1 in FIG. Supply power to the stator winding 38 of the arrow! Image blur in the pitching direction can be prevented by controlling the drive in the opposite direction. Image blur can be similarly prevented in the panning direction. In addition, if image blur occurs in a diagonal direction, the amount of shaking (
The bidirectional angular velocity sensor 41. detects the angular velocity).
By supplying power to the stator windings 31 and 3B of the actuators 44 and 45 by the control circuit 43 so that the output from the actuator 42 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 46 is turned on, the control circuit 43 supplies power to the motor 48 to rotate it. The rotational force of the motor 48 is the idler gear 49.5
The cam pin 5 provided on the lock shaft 51 is transmitted to the lock gear 52 provided on the lock shaft 51 through a speed reduction mechanism consisting of 0.
1a, the lock shaft 51 is moved in the optical axis direction (arrow H direction) using the cam groove 53a of the support member 53 as a guide, and the lock shaft 51 is inserted into the conical recess 54 provided at the rear of the lens barrel 23.
to stop the movement of the lens barrel 23.

Further, when the image blur prevention effect is turned on, the lock switch 46 is turned off, and the control circuit 43 first supplies power to the motor 4B and rotates the motor 48. The rotational force of the motor 4 is transmitted to the lock gear 52 provided on the lock shaft 51 via a reduction mechanism consisting of an idler gear 49.50, and the cam pin 51a provided on the lock shaft 51 is
The lock shaft 51 is moved in the optical axis direction (opposite direction to the arrow H) using the cam groove 53a of the support member 53 as a guide to form a conical recess 5 provided at the rear of the lock shaft 51 and the lens barrel 23.
4 and release the lock of the lens barrel 23.

Here, if the lens barrel 23 has a function of focusing an optical image or changing magnification, the focusing operation of the lens barrel 23 is performed by supplying power from the control circuit 43 to the first motor 70,
As a result, the first motor shaft 64 rotates, and the rotational force is transmitted to the focus ring gear 56, whereby the optical image on the image sensor 22 is focused.

Similarly, the zooming operation of the optical image of the lens barrel 23 is performed by supplying power from the control circuit 43 to the second motor 71, which rotates the second motor shaft 66, and transmits the rotational force to the zoom ring gear 57. As a result, the optical image on the image sensor 22 is magnified. Furthermore, lens barrel 2
In order to adjust the amount of light incident on the image sensor 22 from the third motor 72, power is supplied from the control circuit 43 to the third motor 72,
As a result, the third motor shaft 68 rotates, so that
The aperture 55 operates to adjust the amount of light that enters the image sensor 22 from the lens barrel 23.

As described above, according to this embodiment, the photographic lens for photographing a subject, the photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and the photographic lens and the photoelectric conversion means are integrally held and A holding means made of a resin magnet provided with a magnetized portion subjected to predetermined magnetization, a rotational support means for rotatably supporting the holding means so as to be rotatable in the panning direction or the pitching direction, @opposed to the magnetic portion Since the stator winding is fixed to the rotary support means at the position, the entire photographing apparatus can be easily constructed to be small and lightweight, and can be used hand-held by the photographer. Furthermore, by forming the lens barrel with a resin magnet, the number of parts and man-hours are reduced, which in turn leads to a reduction in cost. Furthermore, by locking the camera body, the sacrificial shadow 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, when carrying the lens, the lens barrel does not come into contact with the exterior, etc., so you can carry it with peace of mind. In addition, if a part of the lens barrel is made of a resin magnet and has the ability to focus an optical image or change magnification, a part of the lens barrel may be magnetized in a predetermined manner. This allows the zoom motor, focus motor, and iris motor to be configured integrally with the lens barrel, making it possible to improve the accuracy and ease of assembly of the zoom motor, focus motor, iris motor, etc. can.

In this embodiment, the lock shaft is moved by a cam, but it may be moved by a screw or the like.

In this embodiment, the motor is configured as a circumferentially facing type, but may be a surface facing type.

Further, in this embodiment, the flange portion is made of a resin magnet, but it may be any part that constitutes the lens m barrel, and is not limited thereto.

Furthermore, although a resin magnet is used in this embodiment, it is not limited to this, as long as it is made of a material that can be magnetized.

Effects of the Invention As described above, a photographic lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a method for integrally holding the photographing lens and the photoelectric conversion means and holding the photographic lens in a predetermined manner. A holding means made of a resin magnet provided with a magnetized part, a rotating support means for rotatably supporting the holding means so as to be rotatable in the panning direction or the pitching direction, and a rotating member at a position facing the magnetized part. Since it is constructed from a stator winding fixed to a dynamic support means, the entire photographing apparatus can be easily constructed to be small and lightweight, and can be used hand-held by a photographer. Furthermore, by forming the lens barrel with a resin magnet, the number of parts and man-hours can be reduced, which in turn can reduce costs.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a photographing device in an embodiment of the present invention;
2 is a sectional view taken along the line XX in FIG. 1, FIG. 3 is a front view of a conventional photographing device, and FIG. 4 is a side view of the conventional photographing device. 23... Lens barrel made of resin magnet, 43...
...Control circuit, 44.45...Actuator-170...First motor, 71...
...Second motor, 72...Third motor.

Claims (1)

[Claims] A photographic lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a magnet that integrally holds the photographic lens and the photoelectric conversion means and is magnetized in a predetermined manner. a holding means made of a resin magnet provided with a magnetic part; a rotational support means for rotatably supporting the holding means so as to be rotatable in a panning direction or a pitching direction; and a rotational support at a position facing the magnetized part. 1. A photographing device comprising: a stator winding fixed to a means; and the holding means is driven in a panning direction or a pitching direction by supplying power to the stator winding.