JPS61295769A - Photographing device - Google Patents

Abstract

PURPOSE:To reduce the size and weight of a photographing device on the whole and to easily take a picture with a camera in hands by providing a holding which holds a photographic lens and a photoelectric converting means in one body so that their optical axes are aligned with each other, a rotary support means which supports the holding means rotatably, and a locking means which locks the holding means. CONSTITUTION:The shake of a lens barrel 23 is detected by angular velocity sensors 43 (panning direction) and 44 (tilting direction) and a control circuit 45 supplies electric power to stator windings 33 and 42 of actuators 46 and 47 and performs control so that the outputs of those angular velocity sensors 43 and 44 are zero. Consequently, the shake of the lens barrel on insulation coordinates is eliminated an horizontal and vertical image blurs are reduced. Further, when the camera is carried or when the image blur prevention effect is turned off, a locking switch 50 is turned off and then the control circuit 45 supplies electric power to a motor 52 to move a locking shaft in the direction of an optical axis and locks it. Then, the control circuit 45 powers off the actuators 46 and 47 and motors 52.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a video camera.

In recent years, with the spread of video tape recorders (hereinafter referred to as 7fiVTR), opportunities to use video cameras have increased, and video cameras that allow stable camera work with less image blur even without the use of a tripod A camera is required.

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 a third
The structure was as shown in Figure 4. FIG. 3 is a front view of a conventional photographing device, and FIG. 4 is a side view. In Figures 3 and 4, there is a rotor case 1 that houses a 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. It is supported by a vertical gimbal 5 at a gimbal axis 4. Similarly for the vertical gyro, the center rotor case 6 has a horizontal gimbal 7 and a vertical gimbal 8.
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.

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 for integrally holding the means so that their optical axes coincide with each other;
Rotating support means for rotatably supporting the holding means in a panning direction or pitching direction; and locking means for locking the holding means so that the axis of the camera body's projection of the camera body relative to the subject and the optical axis of the photographic lens are aligned. The locking device includes a driving means for driving the locking means, a control means for driving and controlling the driving means, and an operating means for operating the control means.

Function: Because the present invention does not use a large and heavy gyro as in the prior art, the present invention can be easily constructed to be small and lightweight, and can be held by a photographer.

Furthermore, by locking the lens barrel, the image axis of the camera body and the optical axis of the photographing lens coincide, so that even after locking, you can take pictures 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, but what to do in case of a power outage By storing power in a capacitor or the like in the control circuit, the capacitor can supply power to the motor that drives the locking means and lock it, so even in the event of a power outage, the lens barrel is fixed to the camera body and the lens barrel remains in place. It can be carried with confidence without coming into contact with the exterior, etc.

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 photographing 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.

Furthermore, the electrical signal converted from the optical image by the image sensor 22 is converted into a predetermined video signal by the video circuit 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 27
Rotating shafts 28.29 from above and below are ball bearings 25.2, respectively.
The lens barrel 23 is rotatably fitted into the first
It is rotatable with respect to the frame 27 of. Also,
A ring-shaped magnet 31, which is magnetized as required, is fixed to the lower part 23b of the lens barrel 23 via a bank plate 3o made of a magnetic material. A stator winding 33 is fixed to the first frame 27 facing the magnet 31 and is bonded to a stator flat plate 32 made of a magnetic material.

In addition, in order to detect the rotational position of the lens barrel 23, a ball element 3 is mounted on the stator flat plate 32 facing the magnet 31.
2a is provided. Ball bearings 34.35 are press-fitted into the left and right sides of the first frame 27, respectively, and rotating shafts 37.38 are rotatably fitted into the ball bearings 34.35 from the left and right sides of the second frame 36, respectively. Ori lens barrel 2
3 and the first frame 27 are rotatable relative to the second frame 36. Furthermore, a ring-shaped magnet 40 that is magnetized as required is fixed to the right side of the first frame 27 via a back plate 39 made of a magnetic material. A stator winding 42 is fixed to the second frame 36 facing the magnet 40 and is bonded to a stator flat plate 41 made of a magnetic material. Further, in order to detect the rotational position of the first frame 27 and the lens barrel 23 in the tilting direction, a Hall element 41a is provided on the stator flat plate 41 facing the magnet 40. An angular velocity sensor 43 for detecting the angular velocity in the vanning direction is fixed to the lens barrel 23, and an angular velocity sensor 43 for detecting the angular velocity in the tilting direction of the lens barrel 23 and the first frame 27 is fixed to the first frame 27. Angular velocity sensor 4 for
4 is fixed. In order to make the output signals of the angular velocity sensors 43 and 44 zero, the control circuit 45 includes an actuator 46 consisting of a magnet 31, a stator winding 33, etc., which rotates the lens barrel 23 in the vanning direction;
An actuator 47 consisting of a magnet 40 and a stator winding 42 that rotates the lens barrel 23 and the first frame 27 in the tilting direction is driven and controlled.

To lock the lens barrel 23, press the lock switch 5.
By turning on 0, power is supplied from the control circuit 45 to the motor 52 fixed to the lock base 51, and the motor 52 rotates. The lock gear 5 provided on the lock shaft 55 transmits the rotational force of the motor 52 through a reduction mechanism consisting of idler gears 53 and 54 provided on the lock base 51.
6. The lock shaft 55 is slidably engaged with a support member 57, and a cam groove 57a provided in the support member 57 engages with a cam pin 55a provided in the lock shaft 55 to prevent movement of the lock shaft 55. I'm guiding.

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 supplied from the VTR main body or the like. In the event of a power outage, the power outage detection unit in the control J path 45 detects the power outage, supplies electricity stored in the capacitor to the motor 52, rotates the motor 52, and transmits the rotational force to the lock shaft 55. 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 (in the vanning direction).
, 44 (tilting direction), and the control circuit 45 supplies power to the stator winding 33.42 of the actuator 46.47 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. By supplying power to the stator winding 42 and controlling its drive in the direction opposite to the direction of arrow 1, image blur in the tilting direction can be prevented. Image blur can be similarly prevented in the banging direction. If image blurring occurs in the diagonal direction, the amount of shaking (angular velocity) is detected by the angular velocity sensor 43 (banning 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 33, 32 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.
are locked so that the optical axis of the lens barrel 23 and the photographing axis of the camera body relative to the subject coincide with each other. When the lock is completed, the control circuit 45 activates the actuator 46.4.
7 and the motor 52 are cut off.

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 and rotates 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 bin 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 supplied from the VTR main body, etc. In the event of a power outage, a power outage detection unit 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 for photographing a subject, the photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and the optical axis of the photographic lens and the charging conversion means are aligned so that their optical axes coincide. a holding means that integrally holds the holding means, a rotary support means that rotatably supports the holding means so as to be rotatable in a banning direction or a pitching direction, and a holding means that supports the holding means with respect to the photographing axis of the camera body relative to the subject and the optical axis of the photographing lens. a locking means for locking the locking means so as to coincide with each other; a driving means for driving the locking means; and a control means for driving and controlling the driving means;
By configuring the control means and the operating means for operating the control means, the entire photographing apparatus becomes small and lightweight, and hand-held photographing can be easily carried out. Furthermore, by locking the camera body, 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, when the camera body loses power,
For example, if the connector of the cable that supplies power from the VTR to the camera body is disconnected, the lens barrel becomes unstable inside the camera body, but as a countermeasure against power outages, a capacitor etc. is installed in the control circuit. By storing electricity, you can supply power to the motor that drives the locking device and lock it, so even in the event of a power outage, the lens barrel is fixed to the camera body, so you can carry it with peace of mind without the lens barrel coming into contact with the exterior, etc. be able to.

In this embodiment, a capacitor provided in the control circuit stores power during a power outage, but the capacitor is not limited to this, and any device that stores electricity may be used. For example, there are batteries, etc.

Effects of the Invention As described above, the photographic lens for photographing a subject, the photoelectric conversion means for converting the optical image from the photographic lens into an electrical signal, and the photographic lens and the photoelectric conversion means are integrated so that their optical axes coincide. A holding means for holding the holding means in the direction of rotation, a rotational support means for rotatably supporting the holding means so as to be rotatable in a banning direction or a pitching direction, and a holding means for aligning the photographing axis of the camera body with respect to the subject and the optical axis of the photographing lens. a locking means for locking the locking means; a driving means for driving the locking means;
By comprising a control means for driving and controlling the drive means and an operating means for operating the control means, the entire photographing apparatus is small and lightweight, and hand-held photographing can be easily carried out.

In addition, by locking, the shooting axis of the camera body and the optical axis of the shooting lens coincide, so even after locking, you can still take pictures.Furthermore, in the event of a power outage to the camera body, for example, the connector of the cable that supplies power from the VTR to the camera body If the lens barrel is removed, the lens barrel becomes unstable inside the camera body, but as a countermeasure in case of a power outage, the motor that drives the locking means is stored with a capacitor in the control circuit. Since the lens barrel can be locked by supplying power to the camera body, even in the event of a power outage, the lens barrel is fixed to the camera body and can be carried with peace of mind without the lens barrel coming into contact with the exterior of the camera.

[Brief explanation of the drawing]

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. 21...Photographing lens, 22...CCD
, 23... Lens barrel, 45... Control circuit, 50... Lock switch, 52...
...Motor, 55...Lock shaft, 58...
...A conical recess. Name of agent: Patent attorney Toshio Nakao Haka1 person 22---
CCD control circuit? 4 L/) +″ Risto ~ 6°

Claims (2)

[Claims] (1) 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 the photographic lens and the photoelectric conversion means are integrally held so that their optical axes are aligned. a rotating support means for rotatably supporting the holding means in a panning direction or a pitching direction; and a rotation support means for rotating the holding means so that the holding means is aligned with the photographing axis of the camera body relative to the subject and the optical axis of the photographing lens. A photographing device comprising a locking means for locking the locking means, a driving means for driving the locking means, a control means for driving and controlling the driving means, and an operation means for operating the control means. (2) The photographing device according to claim 1, wherein the control means controls the drive means so as to lock the holding means in the event of a power outage of the camera body.