JPS62277858A - Motion picture camera - Google Patents

Abstract

PURPOSE:To prevent the feeling of disorder between a video image and a sound depending on the difference between the image pickup direction and the sound collecting direction and to attain miniaturization and light weight for the entire motion picture camera by constituting the titled apparatus by an image pickup lens, an optical conversion means, a support means and a rotary support means. CONSTITUTION:The titled apparatus is provided with an image pickup lens 10 picking up an object, an optical conversion means 11 converting an optical image from the lens 10 into an electric signal, a support means 12 supporting incorporatedly the image pickup lens 10 and the photoelectric conversion means 11 in a way that the optical axes are made coincident, a microphone 47 moved incorporatedly with the supporting means 12 and rotary supporting means 14, 15, 17, 18 supporting the support means 12 freely turnably in the panning direction (or pitching direction). Thus, since a large sized and heavy jyro is not used different a from a conventional device, the constitution with miniaturization and light weight is facilitated. Since the image pickup direction and the sound collecting direction are made coincident, the image pickup is applied without causing any feeling of distorder between the picture and sound due to the deviation between the image pickup and the sound collection directions.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a photographing device such as a video camera.

Conventional 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 described above will be described below with reference to the drawings. Conventionally, this type of photographing device GW has a structure as shown in the front and side views of FIGS. 3 and 4, as shown in, for example, Japanese Patent Laid-Open No. 53-64175. That is, there is a rotor case 1 that houses a rotor that rotates at high speed at the center as a directional gyro, 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 rotor case 6 at the center of the vertical gyro is supported by a horizontal non-hull 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 gyro and the vertical gyro at high speed, the video camera 9 is stable even when shooting in a shaking state, and a captured image with less image blur can be obtained. In the case of normal shooting, the video camera and microphone are installed integrally, so the directions of the video camera and microphone are the same, and it is possible to shoot without any discomfort between video and audio due to misalignment between the shooting direction and the sound collection direction.

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 the entire device must be installed and used. The problem was that it lacked maneuverability.

Means for Solving the Problems In order to solve the above-mentioned problems, the photographing device of the present invention includes: a photographing lens that best shadows the subject; an optical conversion means that converts an optical image from the photographic lens into an electrical signal; A holding means that integrally holds the photographic lens and the photoelectric conversion means so that their optical axes are aligned, a microphone that moves integrally with the holding means, and a holding means that is rotatable in a vanning direction (or a pitching direction). The device is characterized in that it is comprised of rotational support means for dynamically supporting the device.

Function: Due to the above-described configuration, the present invention does not use a large and heavy gyro as in the prior art, so it can be easily constructed to be small and lightweight, and can be used hand-held by the imager. Since the photographing direction and the sound collection direction match, the photograph can be taken without causing any discomfort between the image and the sound due to the misalignment between the photographing direction and the sound collection direction.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

Figure 1 is a configuration diagram of the entire imaging device, and Figure 2 is the X-X diagram in Figure 1.
It is an X sectional view. In FIGS. 1 and 2, a photographic lens 10 for photographing a subject and an image sensor 11 such as a CCD provided on the focal plane of the photographic lens are held in a lens barrel 12. Also, the flange portion 12 of the lens barrel 12
A microphone 47 is held in a position such that the photographing direction and the sound collection direction coincide with each other. Further, the electrical signal converted from the optical image by the image sensor 11 is converted into a predetermined video signal by the video circuit 13. Upper part 12b of lens barrel 12
, ball bearings 14.degree. 15 are press-fitted into the lower portions 12c, respectively, and rotation wheels 17.18 are rotatably fitted into the ball bearings 14.degree. The moon 12 is rotatable relative to the first frame. In addition, the lower part 12 of the lens barrel 12
A ring-shaped magnet 20, which is magnetized as required, is fixed to c through a bank plate 19 made of a magnetic material. Opposed to the magnet 20, a stator winding 22 is fixed to the first frame 16 and is bonded to a stator flat plate 21 made of a magnetic material.

In addition, in order to detect the rotational position of the lens barrel 12, a Hall element 2 is mounted on the stator flat plate 21 facing the magnet 20.
1a is provided. Ball bearings 23.24 are press-fitted into the left and right sides of the first frame 16, respectively, and rotating shafts 26.27 are rotatably fitted into the ball bearings 23.24 from the left and right sides of the second frame 25, respectively. The lens barrel 12 and the first frame 16 are rotatable relative to the second frame 25. Also, the first frame 1
A ring-shaped magnet 29, which is magnetized as required, is fixed to the right side of the magnet 6 via a back plate 28 made of a crude magnetic material. A stator winding 31 is fixed to the second frame 25 facing the magnet 29 and is bonded to a stator flat plate 30 made of a magnetic material. Further, in order to detect the rotational position of the first frame 16 and the lens barrel 12 in the tilting direction, a Hall element 30a is provided on the stator flat plate 30 facing the magnet 29.

An angular velocity sensor 32 for detecting the angular velocity in the vanning direction is fixed to the lens barrel 12, and the lens barrel 12 and the first frame 16 are fixed to the first frame 16.
An angular velocity sensor 33 for detecting the angular velocity in the tilting direction is fixed. This angular velocity sensor 32
．． The control circuit 34 so that the output signal of 33 becomes zero,
An actuator 35 includes a magnet 20 and a stator winding 22 for rotating the lens barrel 12 in the vanning direction, and a magnet 29 and stator la&9131 for rotating the lens mirror F12 and the first frame 16 in the tilting direction. The actuator 36 is driven and controlled.

To lock the lens barrel 12, press the lock switch 3.
8 is turned on, power is supplied from the control circuit 34 to the motor 40 fixed to the lock base 39, and the motor 40 rotates. The rotational force of this motor 40 is transmitted to the lock gear 4 provided on the lock shaft 43 via a reduction mechanism consisting of idler gears 41 and 42 installed in the lock base 39.
4 is transmitted and reached. The lock shaft 43 is slidably engaged with the support member 45, and a cam groove 45a provided in the support member 45 engages with a cam pin 43a provided in the lock shaft 43 to prevent movement of the lock shaft 43. I'm guiding.

The end of the lock shaft 43 has a spherical shape, and locks the lens barrel 12 by coming into contact with a conical recess 46 provided at the rear of the lens barrel 12.

The operation of the one-shadow device configured as described above will be explained below with reference to FIGS. 1 and 2.

When hand-held shooting is performed with a video camera, the video camera shakes due to camera shake or fatigue, resulting in shaking of the 1i shadow image (so-called image blur). The shaking of the lens barrel 12 caused by the video camera is detected by the angular velocity sensors 32 (bending direction) and 33 (tilting direction), and the control circuit 34 controls the actuator 35 so that the outputs from the angular velocity sensors 32 and 33 are zero. By supplying power to and controlling the stator windings 22 and 31 of .36, the lens barrel 12 does not shake with respect to the absolute coordinates and is kept level.

Vertical image blur can be reduced. For example, if the lens barrel 12 is tilted in the tilting direction (in the direction of the arrow ■ in FIG. By supplying power to the 36 stator windings 31 and controlling their 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. In addition, if image blur occurs in a diagonal direction, the amount of shaking (
The bidirectional angular velocity sensor 32. detects the angular velocity).
By supplying power to the stator windings 22 and 21 of the actuators 35 and 36 by the control circuit 34 so that the output from the actuators 33 becomes zero, image blur in the diagonal direction can also be prevented.

In addition, since the microphone 47 is held on the flange portion 12a of the lens barrel 12, there is no misalignment between the shooting direction and the sound collection direction, so there is no discomfort between the video and audio (
Usually, one microphone is used in a handheld shooting device.
It is fixed to the exterior of the shadow device, and in the case of an anti-shake camera, the shooting direction and sound collection direction are misaligned, causing a sense of incongruity between video and audio).

When carrying the camera or turning on the lock switch 38 to turn off the image blur prevention effect, the control circuit 34 supplies N to the motor 40 to rotate the motor 40. The rotational force of the motor 40 is transferred to the idler gear 41
．． A cam bin 43a provided on the lock shaft 43 moves the lock shaft 43 in the optical axis direction (arrow) using the cam groove 45a of the support member 45 as a guide. H direction) and abuts the lock shaft 43 against a conical recess 46 provided at the rear of the lens barrel 12 to lock the lens barrel 12. By locking the lens barrel 12, the microphone 47 is also locked, so that the photographing direction and the sound collection direction do not deviate, so that no discomfort occurs between the video and the audio.

Further, when the lock switch 38 is turned OFF to turn on the image blur prevention effect, the control circuit 34 first supplies power to the motor 40 and rotates the motor 40 . The rotational force of the motor 40 is transmitted to the lock gear 44 provided on the lock shaft 43 via a speed reduction mechanism consisting of idler gears 41 and 42, and the cam bin 43a provided on the lock shaft 43 is transmitted to the lock gear 44 provided on the lock shaft 43.
The lock shaft 43 is moved in the optical axis direction (in the direction opposite to the arrow H) using the cam groove 45a of the support member 45 as a guide, and a conical recess 4 is formed at the rear of the lock shaft 43 and the lens barrel 12.
6 are opened, the lens barrel 12 is unlocked, and the image blur is prevented.

As described above, according to this embodiment, the photographic lens for photographing a subject, the optical conversion means for converting an optical image from the photographic lens into an electrical signal, and the optical axis between the photographic lens and the photoelectric conversion means are connected at once. The structure includes a holding means that integrally holds the holding means, a microphone that moves integrally with the holding means, and a rotational support means that rotatably supports the holding means so as to be rotatable in the panning direction (or pitching direction). The entire photographing device is small and lightweight, and can be easily held hand-held. In addition, since the photographing direction and the sound collection direction match, it is possible to photograph without causing any discomfort between the video and the audio due to the misalignment between the photographing direction and the sound collection direction.

Also, in this example, the microphone is attached to the flange of the lens barrel, but it may also be attached to a case that shields the video circuit, and the position of the microphone is limited to this example. isn't it.

Effects of the Invention As described above, the photographic lens for photographing a subject, the optical 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 integrated so that their optical axes coincide. The entire photographing device is composed of a holding means for holding the holding means, a microphone that moves integrally with the holding means, and a rotational support means for rotatably supporting the holding means so as to be rotatable in the banning direction (or pitching direction). It is small and lightweight, making it easy to take handheld shots. Also,
Since the photographing direction and the sound collection direction are the same, it is possible to photograph without causing any discomfort between the video and the audio due to the misalignment between the photographing direction and the sound collection direction.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of the photographing 'AH in the embodiment of the present invention, Fig. 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 FIG. 2 is a side view of a conventional photographing device. 10... Photographing lens, 11... Photoelectric conversion means, 12... Lens barrel, 16...
・First frame, 25... Second frame,
34...Control circuit, 47...Microphone. Name of agent: Patent attorney Toshio Nakao
8 Ward Ri Dimension°°- L7-'-1-04 shoes

Claims (1)

[Claims] A photographic lens for photographing a subject, an optical conversion means for converting an 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 so that their optical axes coincide. A photographing device comprising: a microphone that moves integrally with the holding means; and a rotational support means that rotatably supports the holding means so as to be rotatable in a panning direction or a pitching direction.