JPS62277860A - Motion picture camera - Google Patents

Abstract

PURPOSE:To prevent a damage to a video camera by constituting the titled apparatus by an image pickup lens, a photoelectric converting means, a supporting means, a rotary supporting means, a detection means and a lock means so as to attain the miniaturization and light weight for the entire motion picture camera. CONSTITUTION:The titled apparatus is provided with an image pickup lens 10 picking up an object, a photoelectric conversion means 11 converting an optical image from the lens 10 into an electric signal, a supporting means 12 supporting integrally the image pickup lens 10 and the photoelectric conversion means 11 in a way that the optical axes made coincident, rotary supporting means 23, 24, 26, 27 supporting freely turnably the support means 12 in the panning direction (or pitching direction), a detection means 47 detecting whether or not an accessory is mounted to the support means 12, and a locking means locking the support means 12 at a prescribed position by the output of the detection means 47. Thus, the miniaturization and light weight are facilitated and the lens barrel is locked before the lens cap is loaded, then the care to damages to the video camera is precluded.

Description

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

Conventional technology In recent years, as video tape recorders have become less popular, there are many opportunities to use video cameras to take pictures, and there is a demand for video cameras that can perform stable camera work with less image blur even without the use of a tripod. There is.

An example of the above-mentioned conventional 1-shadest "A" position will be described below with reference to the drawings. Conventionally, this type of photographing apparatus is shown in FIG. It had a structure as shown in the front and side views in Figure 4.In other words, there was a rotor case 1 that contained a rotor that rotated at high speed as a directional gyro. Further, the horizontal gimbal 3 is supported by the vertical non-hull 5 by the left and right gimbal shafts 4. Similarly, the rotor case 6 at the center of the vertical gyro is supported by the horizontal gimbal 7 and the vertical gimbal 8. A video camera 9 and the like are installed above it.Thus, 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 the image, I<reno. It is possible to obtain fewer captured images.

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. 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 a gyro, but stopping it will reduce the gyro effect. This poses a problem in that the video camera becomes unstable, making it difficult to determine the direction in which you want to shoot, resulting in poor operability.

In addition, when a contrast operator attaches a lens cap to protect the imaging lens (to prevent dust from adhering to the lens), if the lens barrel is not fixed, the video camera must be There was a problem that there was a risk of damage or that the originality was not good.

Means for Solving the Problems In order to solve the above problems, the photographing device of the present invention includes a photographing lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographing lens into an electrical signal, and a photographing lens. holding means that integrally holds the photoelectric conversion means and the photoelectric conversion means so that their optical axes coincide; and rotational support means that rotatably supports the holding means so as to be rotatable in the panning direction (or pitching direction);
This device is characterized by comprising a detection means for detecting whether an accessory is attached to the holding means, and a locking means for fixing the holding means at a fixed position based on the output of the detection means.

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 the photographer can use it hand-held. Even if the photographer forgets to lock the lens barrel and attaches the lens cap, the lens barrel will be locked before attaching Lens Camp, so the camera can be operated with confidence without worrying about damage. can.

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. 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 12a and lower part 12b of lens barrel 12
Ball bearings 14 and 15 are press-fitted into the first frame 16, respectively, and rotation wheels 17 and 18 are installed from the top and bottom of the first frame 16, respectively.
is rotatably fitted in ball bearings 14 and 15, and the lens barrel 12 is rotatable relative to the first frame. Further, a ring-shaped magnet 20 which is magnetized as required is fixed to the lower part L2b of the lens barrel 12 via a hack 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 7) 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 bank plate 28 made of a magnetic material. A stator straddle m31 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.

The lens barrel 12 includes an angular velocity sensor 32 for detecting angular velocity in the panning direction. is fixed, and the first
The frame 16 includes the lens barrel 12 and the first frame 1.
An angular velocity sensor 33 for detecting the angular velocity in the tilting direction of No. 6 is fixed. This angular velocity sensor 3
In order to make the output signal of 2.33 zero, the control circuit 34 operates an actuator 35 consisting of a magnet 20, a stator winding 22, etc. that rotates the lens barrel 12 in the panning direction, and an actuator 35 that rotates the lens barrel 12 and the first frame 16
An actuator 36 consisting of a magnet 29 and a stator winding 31 that rotates the stator in the tilting direction is driven and controlled.

To lock the lens barrel 12, press the lock switch 3.
8 is turned ON, ta 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. The lock shaft 43 is slidably engaged with the support member 45, and a cam 145a provided on the support member 45 engages with a cam pin 43a provided on the lock shaft 43 to guide movement of the lock shaft 43. are doing.

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.

It is configured as described above, and further includes a detection element 47 for detecting whether accessories such as a lens camp, a filter, a hood, etc. are attached to the lens barrel 12 (in this embodiment, an optical detection element for detecting the amount of incident light). When the output value of the detection element 47 reaches a set range, the lens barrel 12 is locked by the control circuit 34.

Furthermore, when the output value of the detection element 47 deviates from the set range, and when the video camera is used with the image blur prevention effect turned on, the lens barrel 120 is unlocked.

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 video camera shakes due to camera shake or fatigue, resulting in shaking of the TI shadow image (so-called image blur). The shaking of the lens barrel 12 accompanying this video camera is detected by the angular velocity sensors 32 (panning direction) and 33 (tilting direction), and the outputs from the angular velocity sensors 32 and 33 are set to If
? The 11 circuit 34 supplies power to the stator windings 22, 31 of the actuators 35, 36 and controls them, so that the lens vL body 12 does not shake with respect to the absolute coordinates and becomes horizontal.

Vertical image blur can be reduced. For example, if the lens barrel I2 is tilted in the tilting direction (in the direction of arrow 1 in FIG. 1), the control circuit 34 controls the actuator 36 so that the output of the angular velocity sensor 33 that detects shaking in the tilting direction becomes zero. Image blur in the tilting direction can be prevented by supplying power to the stator winding 31 and controlling its drive in the direction opposite to the direction of the arrow. Image blur can be similarly prevented in the panning direction. If image blur occurs in the diagonal direction, the angular velocity sensor 32 (panning direction) and angular velocity sensor 33 (tilting direction) will detect the amount of i3 shift (
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 actuator 33 becomes zero, it is possible to prevent image blurring in the diagonal direction.

When the output value of the detection element 47 reaches a set range, that is, when the amount of light incident on the lens barrel 12 becomes low, or when the lock switch 38 is turned on to turn off the image blur prevention effect. The control circuit 34 supplies power to the motor 40 to rotate the motor 40 . The rotational force of the motor 40 is transferred to the idler gear 41. The cam pin 43a of the support member 45 is transmitted to the lock gear 43 provided on the lock shaft 43 through a speed reduction mechanism consisting of a cam pin 43a of the support member 45. The lens barrel 1 is moved by moving the lock shaft 43 in the optical axis direction (in the direction of arrow H) using 145a as a guide.
A lock shaft 43 is brought into contact with a conical recess 46 provided at the rear of the lens barrel 12 to lock the lens barrel 12.

Also, when the output value of the detection element 47 is out of the set range and the video camera is being used with the image stabilization effect ON, or when the lock switch 38 is turned OFF to turn on the image stabilization effect. Then, the control circuit 34 first supplies power to the motor 40 to rotate the motor 40. The rotational force of the motor 40 is transmitted to the lock gear 44 provided on the lock shaft 43 through a reduction mechanism consisting of an idler gear 4.1.42, and the cam pin 43a provided on the lock shaft 43 guides the cam groove 45a of the support member 45. As a result, the lock shaft 43 is moved in the optical axis direction (in the direction opposite to the arrow H), and the lock shaft 43 and the conical recess 46 provided at the rear of the lens barrel 12 are separated, and the lens barrel 12 is in an unlocked state. , the image blur is prevented.

As described above, according to this embodiment, the optical axis of the first darkest lens for photographing a subject, the photoelectric conversion means for converting an optical image from the photographing lens into an electrical signal, and the I stone carving lens and the photoelectric conversion means are Whether or not the holding means is integrally held so as to match, the rotational support means is rotatably supported to rotate the holding means in the panning direction (or pitching direction), and accessories are attached to the holding means. Since the photographic device is composed of a detecting means for detecting the image, and a locking means for fixing the holding gear at a fixed position based on the output of the detecting means, the entire photographing device is small and lightweight, and it is possible to carry out hand-held photographing with good visibility. Also,
By locking, the photographing axis of the camera body and the optical axis of the photographing lens coincide, so even after locking, you can take pictures 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, even if the photographer forgets to lock the lens barrel while using the video camera with image stabilization turned on and attaches Lens Camp to the lens barrel, the lens barrel will be locked and the No axis misalignment.

Furthermore, even if the photographer turns on the image stabilization of the video camera with the lens cap still attached, the lens barrel is locked due to the low light intensity.

(Even if you notice that the stone carver is taking a picture with the lens cap attached and remove the lens cap, the lens barrel is locked when Lens Camp is attached, so there is a risk of damaging the video camera.) (If the lens cap is attached and the video camera is turned on to prevent image blur, the lens barrel is not locked.
(The lens barrel moves involuntarily, so if you apply force to remove the lens cap, the lens barrel will come into contact with the exterior, etc., and there is a risk of damaging the video camera.)

In addition, by attaching a filter or hood, etc.
There is a risk that the center of gravity of the lens barrel may change and the shooting direction may change against the photographer's will, but if a filter or hood is attached, the lens barrel will be locked, so the direction of shooting may change against the photographer's will. The shooting direction does not change.

Furthermore, since the detection means is provided separately, accurate control can be achieved.

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

Furthermore, in this embodiment, an optical detection element that detects the amount of light incident on the lens barrel is used as the detection means, but the detection means also includes a detection element that detects the shift of the center of gravity of the lens barrel.
For example, it may be configured with a magnet and a Hall element), or a switch may be provided at the part where the accessory is attached to the lens barrel to detect that the accessory is attached.The detection means is limited to this example. isn't it.

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 the optical axis is aligned. A holding means for holding the holding means, a rotating support means for rotatably supporting the holding means so as to be rotatable in the panning direction (or pitching direction), and a detection for detecting whether or not an accessory is attached to the holding means. By comprising the holding means and the locking means for fixing the holding means at a fixed position based on the output of the detection means, the photographing apparatus as a whole becomes small and lightweight, and it is possible to carry out hand-held photographing for good viewing. Also, by locking, the shooting axis of the camera body and the optical axis of the shooting lens are lost, so even after locking, you can still take pictures.Furthermore, you can carry it with confidence because the lens barrel does not come into contact with the exterior, etc. be able to.

In addition, even if the photographer forgets to lock the lens barrel while using the video camera with image stabilization turned on and attaches the lens cap to the lens barrel, the lens barrel will be locked and the camera will not be exposed to light. No axis misalignment.

Furthermore, even if the photographer turns on the image stabilization function on the video camera while wearing the Lens Camp, the lens [Ii4] is locked due to low illuminance.

Even if the photographer notices that he or she is taking a picture with the lens cap attached and removes the lens cap, the lens barrel is locked when the lens cap is attached, so there is a risk of damaging the video camera. do not have. (You can prevent image blur when using the video camera with the lens cap attached.)
In the N state, if the lens barrel is not locked, it will move involuntarily, so if you apply force to remove the lens cap, the lens barrel may come into contact with the exterior, etc., which may cause the video camera to move. (There is a risk of damage.)

In addition, by attaching a filter or hood, etc.
There is a risk that the center of gravity of the lens barrel may change and the shooting direction may change against the photographer's will, but if a filter or hood is attached, the lens barrel will be locked, so the direction of shooting may change against the photographer's will. The shooting direction does not change.

Further, by providing a separate detection means, good control of 15 degrees can be achieved.

[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 the conventional photographing device, and FIG. 4 is a side view of the conventional photographing device. 10... Photographing lens, 11... Photoelectric conversion means, I2... Lens barrel, 16...
・First frame, 25... Second frame,
34...Control circuit, 38...Lock switch, 40...Motor, 43...
Lock shaft, 46...Conical recess, 47...
...Detection element. Name of agent: Patent attorney Toshio Nakao Haka1 person n...-c
cD 25・-242nd cap-to 1 C dimension drawing

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 holding means for integrally holding the photographic lens and the photoelectric conversion means so that their optical axes coincide. a rotating support means for rotatably supporting the holding means in a panning direction (or a pitching direction); a detection means for detecting whether an accessory is attached to the holding means; and locking means for fixing the holding means at a fixed position by an output of the means.