JPS6291085A - Image pickup device - Google Patents

Abstract

PURPOSE:To miniaturize and lighten a device in size and weight without using a gyroscope and not to disturb a preventive effect against a picture shaking due to a hand-touch, etc. by providing a turn supporting means which supports rotatably and freely a lens barrel and a photoelectric conversion means, and a cover which covers an exposed lens barrel. CONSTITUTION:A lens barrel 63 which supports an image pickup lens and an image pickup element 62 is set rotatably and freely against the first frame 67, and the lens barrel 63 and the first frame 67 are set rotatably and freely against the second frame 76. Since parts of a focusing frame 11 and a focusing gear frame 18 at the lens barrel 63 are exposed, a cover 50 is provided at the front plane of a cabinet 49. The fluctuation of the lens barrel 63 is detected with angular velocity sensors 83 (in a panning direction) and 84 (in a tilting direction), and a control circuit 85 supplies a power to the stator windings 73 and 82 of actuators 86 and 87 so as to set the outputs of the sensors 83 and 84 at zeros. Thereby, rocking of the lens barrel 63 against an absolute coordinate is eliminated, enabling the reduction of the picture shaking in the horizontal and the vertical directions.

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 In recent years, with the spread of video tape recorders (hereinafter referred to as VTRs), there are many opportunities to use video cameras to take pictures. A capable video camera is requested.

An example of the above-mentioned conventional photographing device will be described below with reference to the drawings. Conventionally, this type of photographing device has had a structure as shown in FIGS. 5 and 6, as shown in, for example, Japanese Patent Laid-Open 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. Similarly, for 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 is mounted on the rotor case 6.
etc. are installed.

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, when shooting hand-held and there is no need to prevent image blur, you can stop the image blur prevention means such as the gyro, but by stopping the gyro, There was a problem in that the horizontal gimbal 3.7 and the vertical gimbal 5.8 became ineffective and the stability of the horizontal gimbal 3.7 and the vertical gimbal 5.8 was lost and the video camera became unstable, making it difficult to determine the direction in which to shoot. Furthermore, there is a problem in that if the user touches a lens barrel, a video camera body, etc. while preventing image blur, the effect of preventing image blur is reduced.

Means for Solving the Problems In order to solve the above problems, the present invention provides a lens barrel that includes a photographic lens for photographing a subject and a focusing operation section, and a lens barrel that converts an optical image from the photographic lens into an electrical signal. A photoelectric conversion means, a holding means that integrally holds the photographic lens and the photoelectric conversion means so that their optical axes are aligned, and a lens barrel and the photoelectric conversion means are moved in a tilting direction (or panning direction).
a cabinet that covers the focusing operation section of the lens barrel so as to expose it and has a first engaging section; and a cabinet that engages with the first engaging section of the cabinet. The lens barrel has a first engaged portion that fits together with the lens barrel, and a cover that covers the lens barrel exposed from the cabinet.

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.

A dustproof effect can be obtained by attaching the cover to the cabinet so as to cover the lens barrel exposed from the cabinet. Also, when in the image stabilization mode, the lens barrel faces the same direction even though the cabinet is shaking, so it looks as if the lens barrel is shaking unsteadily, which feels strange. By attaching it to the cabinet and covering the lens barrel, that uncomfortable feeling disappears. By attaching the cover, hands and the like do not touch the lens barrel, so the effect of preventing image blur is no longer hindered. Furthermore, you can carry it with confidence.

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 partial cross-sectional view of the lens barrel of the photographing device, Fig. 2 is a configuration diagram of the entire photographing device, Fig. 3 is a sectional view taken along line XX in Fig. 2, and Fig. 4 is a partial cross-sectional view of the cover. FIG. 2 is a sectional view of the second embodiment.

First, in FIG. 1, the focusing frame 11 includes a focusing lens 12.
, 13.14 are inserted, and the focusing lenses 13 and 14 are inserted.
The distance between the surfaces is regulated by a lens spacer 15. And the focusing lens 12, 13, 14 is the lens holding ring 1.
6 is fixed to the focusing frame 11. Also, focusing frame 11
A focusing gear frame 18 having a focusing gear 17 is fixed thereto. And a helicoid screw 19 provided in the focusing frame 11
is screwed into a helicoid screw 21 provided on the fixed barrel 20. By rotating the focusing frame 11 or the focusing gear frame 18 for the optical axis, these helicoid screws 19.2
1, the focusing lenses 12, 13, and 14 are extended in the optical axis direction. Further, by pressing a focus operation button (not shown), a focus motor (not shown) is rotated, and a focus gear 17 and a focus gear frame 18 that are engaged with this focus motor (not shown) are rotated. By rotating in the direction of the optical axis, the focusing lenses 12, 13, and 14 are extended in the direction of the optical axis.

In order to regulate the amount of extension of the focusing lens 12, 13, 14 in the optical axis direction, the focusing gear frame 18 has a notch 22 for regulating the amount of extension, and the fixed barrel 20 has a notch 22. A stopper 23 is provided which comes into contact with the end of.

The variable magnification lens 24, 25, 26 is attached to the first lens holding frame 2.
7 and threaded part 2 of the holding ring 28 of the variable magnification lens 24.
The variable power lenses 24, 25, and 26 are fixed to the first lens holding frame 27 by screwing the lens 9 with the threaded portion 30 of the first lens holding frame 27. The correction lens 31 is inserted into the second lens holding frame 32 , and the holding ring 33 presses the correction lens 31 against the second lens holding frame 32 to fix it. Further, the first lens holding frame 27 and the second lens holding frame 32 are provided with holes 36 and 37 that fit into guide poles 35 fixed by the fixed barrel 20 and the ball support plate 34 in order to move in the optical axis direction. It moves in the optical axis direction using the guide pole 35 as a guide. The cam cylinder 38 slides on the inner peripheral side of the fixed cylinder 20 and connects the first lens holding frame 27 and the second lens holding frame 27.
It has a first cam groove 39 and a second cam groove 40 for moving the lens holding frame 32 in the optical axis direction, and its position is regulated by the pole support plate 34. The ball support plate 34 is fixed by the pole support temporary holding screw 41 screwing into the threaded portion 42 of the fixed barrel 20 .

A first cam groove 39 and a second cam groove 4 provided in the cam cylinder 38
In order to regulate the positions of the variable magnification lens 24, 25, 26 and the correction lens 31 on the optical axis, they are screwed into the first lens holding frame 27 and the second lens holding frame 32, respectively. Cam pins 43 and 44 are engaged, and a pin 45 is implanted in the cam cylinder 38.

A zoom gear 47 is rotatably fitted into the zoom ring 46 for the optical axis, and a pin 45 is engaged with a long groove (not shown) formed on the inner circumferential side. That is, when the zoom ring 46 rotates, a long groove (not shown) in the optical axis direction
The pin 45 engaged with is driven and the cam cylinder 38 is rotated, so that the first lens holding frame 27 and the second lens holding frame 32 are rotated.
Variable magnification lenses 24° 25, 26 and correction lens 31
Zooming is performed with the position of the lens being regulated by the first cam groove 39 and the first cam groove 40. When zooming, a zoom motor (not shown) is rotated by pressing a zoom operation button (not shown), and rotational force is transmitted to the zoom gear 47 that engages with this zoom motor (not shown), thereby performing zooming. will be held.

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

In FIGS. 2 and 3, the photographing lenses for photographing the subject (focusing lens 12, 13, 14, variable magnification lens 24,
25.26, correction lens 31, fixed lens (not shown)
, a master lens (not shown)) and an image sensor 62 such as a CCD provided on the focal plane of the photographing lens are held in a lens barrel 63. Further, the electrical signal converted from the optical image by the image sensor 62 is converted into a predetermined video signal by the video circuit 64. Ball bearings 65 and 66 are press-fitted into the upper part 63a1 and the lower part 63b of the lens barrel 63, respectively, and rotating wheels 68 are inserted from the top and bottom of the first frame 67, respectively.
．． 69 is rotatably fitted in ball bearings 65 and 66, and the lens barrel 63 is rotatable with respect to the first frame 67. Further, a ring-shaped magnet 71 which is magnetized as required is fixed to the lower part 63b of the lens barrel 63 via a back plate 70 made of a magnetic material. A stator winding 73 is fixed to the first frame 67 facing the magnet 71 and is bonded to a stator flat plate 72 made of a magnetic material.

In addition, in order to detect the rotational position of the lens barrel 63, a Hall element 7 is mounted on the stator flat plate 72 facing the magnet 71.
2a is provided. Ball bearings 74.75 are press-fitted into the left and right sides of the first frame 67, respectively, and rotating shafts 77 and 78 are rotatably fitted into the ball bearings 74.75 from the left and right sides of the second frame 76, respectively. Ori lens barrel 6
3 and the first frame 67 are rotatable relative to the second frame 76. Furthermore, a ring-shaped magnet 80 that is magnetized as required is fixed to the right side of the first frame 67 via a bank plate 79 made of a magnetic material. A stator winding 82 is fixed to the second frame 76 facing the magnet 80 and is bonded to a stator flat plate 81 made of a magnetic material. Further, in order to detect the rotational position of the first frame 67 and the lens barrel 63 in the tilting direction, a Hall element 81a is provided on the stator flat plate 81 facing the magnet 80. An angular velocity sensor 83 for detecting the angular velocity in the panning direction is fixed to the lens barrel 63, and an angular velocity sensor 83 for detecting the angular velocity in the tilting direction of the lens barrel 63 and the first frame 67 is fixed to the first frame 67. Angular velocity sensor 8 for
4 is fixed. In order to make the output signals of the angular velocity sensors 83 and 84 zero, the control circuit 85 includes an actuator 86 consisting of a magnet 71, a stator winding 73, etc., which rotates the lens barrel 63 in the panning direction;
An actuator 87 consisting of a magnet 80 and a stator winding 82 that rotates the lens barrel 63 and the first frame 67 in the tilting direction is driven and controlled.

Parts of the focusing frame 11 and focusing gear frame 18 of the lens barrel 63 are exposed from the cabinet 49, allowing manual and electric focusing to be performed.

A female screw 49a is provided on the front surface of the cabinet 49 so that a cover 50 can be attached and removed, and the cover 50 is provided with a male screw 50a that is screwed into the female screw 49a.

The cover 50 is fixed to the cabinet 49 by female screws 49a and male screws 50a, and covers the lens barrel 63. Also,
On the subject side of the cover 50, there is a transparent cloth 51 made of acrylic.
has been established.

In addition, when locking the lens barrel 63, use the female screw 90.
A support member 91 is provided on the exterior 49, and a lock shaft has a screw thread 92 that engages with the female thread 90, and has a spherical end shape in the direction facing the lens barrel 63. By rotating the lock shaft 93 in the right-handed direction, the lock shaft 93 moves in the optical axis direction (arrow I (direction)) using the female thread 90 and the male thread 92 as guides, and locks the conical shape provided at the rear of the lens barrel 63. The lens barrel 6 is in contact with the concave portion 94 of
Lock 3. Also, by rotating the lock shaft 93 in the left-hand thread direction, the lock shaft 93 moves in the optical axis direction (opposite direction of arrow H) using the female thread 90 and male thread 92 as guides, and is attached to the rear of the lens barrel 63. The lens barrel 63 is separated from the provided conical recess 94, and the lens barrel 63 is in an unlocked state, thereby preventing image blur.

Further, the lock shaft 93 is provided with a switch pressing portion 95, and this switch pressing portion 95 automatically turns on and off a switch 96 fixed to the support member 91 as the lock shaft 93 moves. Actuator 86.
Automatically controls power supply to 87.

The operation of the photographing apparatus configured as described above will be explained below with reference to FIGS. 1, 2, and 3.

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 angular velocity sensor 83 (panning direction) detects the shaking of the lens barrel 63 caused by this video camera.
, 84 (tilting direction), and the control circuit 85 controls the stator winding 73.82 of the actuator 86.87 by supplying power so that the output from the angular velocity sensor 83.84 becomes zero. This eliminates the shaking of the lens barrel 63 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 63 swings in the tilting direction (in the direction of arrow 1 in FIG. 3), the control circuit 85 controls the actuator 87 so that the output of the angular velocity sensor 84 that detects the swing in the tilting direction becomes zero. Image blur in the tilting direction can be prevented by supplying power to the stator winding 82 and controlling its drive in the direction opposite to the direction of arrow 1. 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 83 (panning direction) and angular velocity sensor 84 (tilting direction), and the angular velocity sensors 83 and 84 in both directions detect the amount of shaking. By supplying power to the stator windings 8iI73.72 of the actuators 86.87 by the control circuit 85 so that the output becomes zero, it is possible to prevent image blurring in the diagonal direction.

When in the image blur prevention state, the lens barrel 63 is placed in the cabinet 4.
9 are facing the same direction even though they are shaking, which makes it seem as if the lens barrel 63 is shaking unsteadily, which feels strange. By putting it away,
That discomfort will disappear. By attaching the cover 50, hands and the like do not touch the lens barrel 63, so the effect of preventing image blur is not hindered. Further, by attaching a cover 50 to the cabinet 49 so as to cover the lens barrel 63 exposed from the cabinet 49, a dustproof effect can be obtained.

When carrying the camera or turning off the image stabilization function,
By rotating the lock shaft 93 in the right direction, the lock shaft 93 moves in the optical axis direction (arrow H direction) using the female thread 90 and the male thread 92 as guides, and the conical shape provided at the rear of the lens barrel 63 moves. The lens barrel 63 comes into contact with the recess 94 of the
lock. At this time, the switch pressing part 95 provided on the lock shaft 93 turns on the switch 96 to cut off the power supply to the actuators 86 and 87, thereby reducing power consumption.

In addition, by rotating the lock shaft 93 in the left-hand thread direction, the lock shaft 93 can be rotated using the female thread 90 and the male thread 92 as guides.
moves in the optical axis direction (opposite direction of arrow H) and separates from a conical recess 94 provided at the rear of the lens barrel 63,
The lens barrel 63 is in an unlocked state to prevent image blurring. At this time, the switch pressing part 9 provided on the lock shaft 93
5 turns off the switch 96, power is supplied to the actuators 86 and 87, and the image blur prevention state is established.

When zooming, by pressing a zoom operation button (not shown), a zoom motor (not shown) rotates to drive the zoom gear 47 of the lens barrel 63 and zoom through the zoom ring 46 and cam barrel 38. zooming is performed by moving the first lens holding frame 27 and the second lens holding frame 32 in the optical axis direction.

When focusing, when the image stabilization function is ON, pressing the focus operation button (not shown) causes the focus motor (not shown) to rotate and move the lens barrel 63.
By driving the focusing gear 17 provided on the focusing frame 11, the focusing frame 11 rotates, and the focusing lens moves in the optical axis direction to focus. Further, when the image blur prevention function is OFF or when the cover is removed and locked, focus is achieved by rotating the focusing frame 11 by hand. Alternatively, focusing is performed electrically by pressing a focus operation button (not shown).

As described above, according to this embodiment, there is provided a lens barrel including a photographing lens for photographing a subject and a focusing operation section, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a photoelectric conversion means for converting an optical image from the photographing lens into an electrical signal. a holding means that integrally holds the lens barrel and the photoelectric conversion means so that their optical axes are aligned with the conversion means; a rotational support means that supports the lens barrel and the photoelectric conversion means so as to be rotatable in a tilting direction or a panning direction; a cabinet that covers the focusing operation section of the lens barrel so as to expose it and has a first engaging section; and a first engaged section that engages with the first engaging section of the cabinet; In addition, since the camera is configured to include a cover that covers the lens barrel exposed from the cabinet, the entire photographing device becomes compact and lightweight, allowing for easy hand-held photography. A dustproof effect can be obtained by attaching a cover to the cabinet so as to cover the lens barrel exposed from the cabinet. Also, when in the image stabilization mode, the lens barrel faces the same direction even though the cabinet is shaking, so it looks as if the lens barrel is shaking unsteadily, which feels strange.
By attaching the cover to the cabinet and covering the lens barrel, this discomfort will disappear. By attaching the cover, hands and the like do not touch the lens barrel, so the effect of preventing image blur is not hindered.

Furthermore, you can carry it with confidence.

Next, a second embodiment of a part of the cover will be described with reference to FIG.

In FIG. 4, a female screw 49a is provided on the subject side of the cabinet 49, and a male screw 50a that engages with this female screw 49a is provided on the cover 50.
By screwing together the male screw 50a and the cover 50,
It is fixed to the cabinet 49.

Further, on the subject side of the cover 50, a female screw 49b is provided for attaching accessories such as a filter (not shown).

Generally, accessories such as filters are often attached to the lens barrel, but in the photographing device of this example, when the accessories such as filters are attached directly to the lens barrel in the image stabilization state, the center of gravity of the lens barrel Since the position moves, the effect of preventing image blurring decreases. Even if the center of gravity is corrected electrically, power consumption increases, which affects the shooting time and the like.

Therefore, as in the second embodiment of the present invention, by attaching a cover to the cabinet and providing a threaded portion on the cover to which accessories such as a filter can be attached, there is no reduction in the image blur prevention effect and an increase in power consumption. You can attach accessories such as filters without having to worry about it.

In this embodiment, the cabinet and the cover are attached using screws, but the screws are not limited to screws, and any screws may be used as long as the cover can be fixed to the cabinet. For example, there is a fixing method using a spring or the like.

Effects of the Invention As described above, a lens barrel including a photographing lens for photographing a subject and a focusing operation section, a photoelectric conversion means for converting an optical image from the photographing lens into an electrical signal, and a combination of the photographing lens and the photoelectric conversion means are provided. A holding means that integrally holds the lens barrel and the photoelectric conversion means so that the optical axes coincide with each other, a rotation support means that supports the lens barrel and the photoelectric conversion means so as to be rotatable in the tilting direction (or panning direction), and A cabinet that covers the focusing operation section so as to expose it and has a first engaging section; and a first engaged section that engages with the first engaging section of the cabinet and is exposed from the cabinet. By configuring the camera to include a cover that covers the lens barrel, the entire photographing device becomes compact and lightweight, allowing for easy hand-held photography. A dustproof effect can be obtained by attaching a cover to the cabinet so as to cover the lens barrel exposed from the cabinet. Also, when in the image stabilization mode, the lens barrel faces the same direction even though the cabinet is shaking, so it looks as if the lens barrel is shaking unsteadily, which feels strange. By attaching it to the camera and covering the lens barrel, that discomfort will disappear.

By attaching the cover, hands and the like do not touch the lens barrel, so the effect of preventing image blur is no longer hindered. Furthermore, you can carry it with confidence.

By providing an engaging portion for attaching accessories such as a filter to the subject side of the cover, accessories such as a filter can be attached without deteriorating the image blur prevention effect or increasing power consumption.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a lens barrel of a photographing device according to an embodiment of the present invention, FIG. 2 is a configuration diagram of the photographing device, and FIG.
The figure is a cross-sectional view taken along line X-X in Figure 2, and Figure 4 is a cross-sectional view of the
FIG. 5 is a front view of a conventional photographing device, and FIG. 6 is a side view of the conventional photographing device. 11...Focusing frame, 49...Cabinet, 49a...Female thread, 50...Cover, 50a...Male thread, 50b ...Female thread, 51...Transparent plate, 63...Lens barrel, 71°80...Magnet, 73.8
2... Stator winding, 83° 84... Angular velocity sensor, 85... Control circuit, 86.87
...actuator. Agent's name: Patent attorney Toshio Nakao (1 person)

Claims (3)

[Claims] (1) A lens barrel including a photographing lens for photographing a subject and a focusing operation section, a photoelectric conversion means for converting an optical image from the photographing lens into an electrical signal, and light from the photographing lens and the photoelectric conversion means. a holding means that integrally holds the lens barrel and the photoelectric conversion means so that their axes coincide with each other; a rotational support means that supports the lens barrel and the photoelectric conversion means so as to be rotatable in a tilting direction or a panning direction; a cabinet that covers a focusing operation section so as to expose it and has a first engaging section; and a first engaged section that engages with the first engaging section of the cabinet; and a cover that covers the lens barrel exposed from the lens barrel. (2) The cover is characterized in that the surface of the lens barrel facing the focusing lens is made of a transparent member.
Photographic equipment as described in section. (3) The photographing device according to claim 1, wherein the cover has a second engaging portion for engaging an accessory on the subject side.