JPS6350170A - Photography equipment - Google Patents

Abstract

PURPOSE:To obtain the whole photographing device small and lightweight by making a hood move to a first position and cover a lens barrel when an operating means is switched to an unlock mode, and move to a second position and expose a part of the lens barrel when switched to a lock mode. CONSTITUTION:During unlock state (blur prevention state), a lens barrel 63 is covered by a cabinet 49 and a hood 100. Thereby, the hindrance to rotation of the lens barrel 63 necessary for prevention of blurring of picture caused by careless touching of fingers etc. of an operator does not occur. As a part of a focusing frame 11 and a focusing gear frame 18 provided in front of the lens barrel 63 is exposed to outside, during the lock state, focusing can be made easily by manual operation, and high grade photographing technique impossible by electric operation can be used freely.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a photographing device.

Conventional technology In recent years, with the spread of video tape recorders (hereinafter referred to as VTRs), there are more opportunities to use video cameras to take pictures, and it is now possible to perform stable camera work with less blurring without using a tripod. A video camera is required.

An example of the above-mentioned conventional photographing device will be described below with reference to the drawings. Conventionally, this type of photographing apparatus has had a structure as shown in FIGS. 4 and 5, as shown in, for example, Japanese Patent Laid-Open No. 53-64175. FIG. 4 is a front view of a conventional photographing device, and FIG. 5 is a side view. Fourth
In Fig. 5, there is a rotor case 1 that 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 to the vertical gyro, a 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. In addition to the problem of lack of mobility, there is also the problem that if the lens barrel or the video camera body is touched during image blur prevention, the effect of image blur prevention will be reduced.

Means for Solving the Problems 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 contrast lens and the photoelectric conversion means are integrally held. a lens barrel; a cabinet that covers a part of the lens barrel; a first position that covers the lens barrel exposed from the cabinet; and a second position that exposes a part of the lens barrel. a hood that reciprocates between the lens barrels, a rotational support means for rotatably supporting the lens barrel in a panning direction or a pitching direction, and a locking means for locking the lens barrel so as not to rotate; an operating means for switching between a non-lock mode and a lock mode; and when the operating means is switched to the non-lock mode, the hood is switched to the first lock mode.
a control means for controlling the hood to move to the second position to cover the lens barrel, and to move the hood to the second position to expose a part of the lens barrel when the operating means is switched to a lock mode; It is composed of

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.

Furthermore, in the non-lock mode, by covering the lens barrel with the foot, the lens barrel is prevented from being touched inadvertently, and the rotational movement of the lens barrel is not hindered.

Furthermore, when in lock mode, the hood moves to expose a portion of the lens barrel, allowing manual focusing operations. In the lock mode, the lens barrel is fixed to the camera body, so the lens barrel does not rotate and wobble, and manual focusing operations can be easily performed.

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 sectional view of a lens barrel of a photographing device, FIG. 2 is a configuration diagram of the entire photographing device, and FIG. 3 is a sectional view taken along line XX in FIG. 2. First, in FIG. 1, focusing lenses 12, 13, and 14 are inserted into the focusing frame 11, and the distance between the surfaces of the focusing lenses 13 and 14 is regulated by a lens spacer 15. and focusing lens 1
2, 13, and 14 are fixed to the focusing frame 11 by a lens holding ring 16. Further, a focusing gear frame 18 having a focusing gear 17 is fixed to the focusing frame 11 . A helicoid screw 19 provided on 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 19.21 fix the focusing lens 1.
2.13°14 is 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 1 are engaged with the focus motor (not shown).
Focusing lens by rotating 8 for the optical axis! 2.1
3. Pay out 14 in the optical axis direction. and focusing lens 12
．． 13. In order to regulate the amount of extension in the optical axis direction of 14, the focusing gear frame 18 has a notch 22 for regulating the amount of extension, and the fixed barrel 2o is in contact with the end of the notch 22. A stopper 23 is provided.

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 screw portion 3o 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 balls 35 fixed by the fixed barrel 20 and the pole 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 pole support plate 34 is fixed by the ball 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 fitted into the zoom ring 46 so as to be rotatable around 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 power lens 24°25+2o and correction lens 3
1 is regulated by the first cam groove 39 and the first cam groove 40, and zooming is performed. When zooming, a zoom motor (not shown) is rotated by pressing a zoom operation button (not shown), and rotational force is transmitted to a zoom gear 47 that engages with the zoom motor (not shown). Zooming is performed.

Next, the overall configuration of the Yang shadow 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 a photographing element 62 such as a C''CD provided at the focal plane of the photographing lens are held in a lens barrel 63.The photographing element 62 also converts an optical image into The generated electrical signal is converted into a predetermined video signal by the video circuit 64.The upper part 63a of the lens barrel 63,
Ball bearings 65 and 66 are press-fitted into the lower part 63b, respectively, and rotation wheels 6 are inserted from the top and bottom of the first frame 67, respectively.
8.69 is rotatably fitted into ball bearings 65 and 66, and the lens barrel 63 is rotatable with respect to the first frame 67. In addition, the lower part 63b of the lens barrel 63
A ring-shaped magnet 71, which is magnetized as required, is fixed through a back plate 70 made of a magnetic material. A first frame 67 faces the magnet 71.
A stator winding 73 bonded to a stator flat plate 72 made of a magnetic material is fixed to the stator winding 73 .

In addition, in order to detect the rotational position of the lens barrel 63, a Hall element 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 wheels 77, 78 are rotatably fitted into the ball bearings 74.75 from the left and right sides of the second frame 76, respectively. Cage 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 operates an actuator 8 consisting of a magnet 71 that rotates the lens barrel 63 in the vanning direction, a fixed pre-winding 'fIA73, etc.
6, and an actuator 87 consisting of a magnet 80 and a stator winding 82 that rotate the lens barrel 63 and first frame 67 in the tilting direction.

To lock the lens barrel 63, press the lock switch 9.
0 is turned on, power is supplied from the control circuit 85 to the motor 92 fixed to the lock base 91, and the motor 92 rotates. The rotational force of this motor 92 is transferred to a lock gear 96 provided on a lock shaft 95 via a reduction mechanism consisting of an idler gear 93° 94 provided on a lock base 91.
is transmitted to. The lock shaft 95 is slidably engaged with the support member 97, and is provided with a cam* provided on the support member 97.
97a engages with a cam pin 95a provided on the lock shaft 95 to guide the movement of the lock shaft 95.

The end shape of the lock shaft 95 is spherical, and when the conical recess 94 provided at the rear of the lens barrel 63 and the lock shaft 95 moved leftward from the position shown in FIG. The lens barrel 63 is locked so that the optical axis of the lens barrel 63 and the photographing axis of the camera body are aligned, and the rotation of the motor 92 is stopped in the locked state. Lens barrel 63
A conical recess 94 provided at the rear of the lens barrel 63 is sized so as to come into contact with a lock shaft 95 within the rotation range of the lens barrel 63.

Further, when the lock switch 90 is turned OFF, the motor 92 rotates in the opposite direction, and the lock shaft 95 moves rightward to the position shown in FIG. Then, the lens barrel 63 is brought into an unlocked state, and the rotation of the motor 92 is stopped. Then, power is supplied to the actuators 86 and 87, and the image blur prevention state is established. In this image blur prevention state, as shown in FIG. 2, a part of the focusing frame 11 and focusing gear frame 18 of the lens barrel 63 protrude from the cabinet 49, but are guided by the cabinet 49 and are roughly guided by the cabinet 49. It is covered by a hood 100 that is slidably supported in the optical axis direction. Therefore, in this state, focusing frame 1
This is to prevent accidental touching of the first-class lens barrel parts. This eliminates the risk of losing the image blur prevention effect during shooting. In this state, the focusing operation is performed electrically as described above. Now, when the lock switch 90 is turned ON from the image blur prevention state, that is, the locked state shown in FIG. ) is rotated by the control circuit 85. A gear 102 integrally fixed to an output shaft 101 of this motor (not shown) rotates counterclockwise in FIG. A gear 104 rotatably supported by a shaft 103 fixed to the cabinet 49 meshes with the gear 102 and also engages the hood 10.
It meshes with a rack 105 that is integrally provided with the hood 100 in a direction parallel to the sliding direction of the hood 100. Therefore, the rotation of the motor (not shown) is transmitted to the rack 105 through the gears 102 and 104, and the rack 105 is moved rightward in FIG. 2 to the position shown in FIG.
(not shown) stops, and a portion of the focusing frame 11 and focusing gear frame 18 are exposed from the cabinet 49 and the hood 100. This makes it possible to perform not only the electric focusing operation described above but also a manual focusing operation. At this time, since the lens barrel 63 is locked to the cabinet 49 as described above, the lens barrel 63 is locked to the cabinet 49 as described above.
3 does not wobble, making manual focusing operations extremely easy.

The operation of the imaging device 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 and reduces 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. By supplying power to the stator winding 82 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 during the banning mode. 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 73, 72 of the actuators 86, 87 by the control circuit 85 so that the output becomes zero, image blur in the diagonal direction can also be prevented.

When turning off the image stabilization function, turn on the lock switch 90 to rotate the motor 92.
The lock shaft 95 is moved to the left in FIG. 2 via a reduction mechanism consisting of idler gears 93 and 94.

As a result, the lock shaft 95 and the conical recess 94 provided at the rear of the lens barrel 63 come into contact, and the lens barrel 63 is locked with respect to the cabinet 49. Furthermore, the power supply to the actuators 86, 87 is cut off and the motor (not shown) rotates, moving the hood 100 from the position shown in FIG. 2 to the position shown in FIG. Move it to the locked position.

At this time, a portion of the focusing frame 11 and focusing gear frame 18 provided at the front of the lens barrel 63 are exposed to the outside, so that manual focusing operation becomes possible. Furthermore, in the locked state, as described above, the power supply to the actuators 86 and 87 is cut off, which also contributes to reducing power consumption.

When the lock switch 90 is turned OFF, the motor 92 rotates in reverse, and the lock shaft 95 moves rightward to the position shown in FIG. 2, thereby releasing the lens barrel 63. At this point, the rotation of the motor 92 is stopped, and the actuators 86 and 87 are energized to prevent image blurring. When the lock switch 90 is turned off, the motor (not shown) also starts rotating, rotating the gear 102 clockwise and the gear 104 counterclockwise, so that the rack 1
When the hood with 05 moves leftward to the position shown in FIG. 2, the motor (not shown) stops rotating. In this state, the lens barrel 63 is connected to the hood 100 and the cabinet.

Since the operator's hand or the like does not directly touch the lens barrel 63, the effect of preventing image blur is not hindered.

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. Also, when the image stabilization function is OFF,
Focusing is achieved by manually rotating the focusing frame 11. Alternatively, focusing can be performed electrically by pressing a focus operation button (not shown).

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.

As described above, according to this embodiment, in the unlocked state (image blur prevention pattern B), the cabinet 49 and the hood 10
Since the lens barrel 63 is covered by the lens barrel 63, the rotation of the lens barrel 63 necessary for preventing image blur will not be hindered due to the operator's fingers or the like inadvertently touching the lens barrel 63.

In addition, when in the locked state, part of the focusing frame 11 and focusing gear frame 18 provided at the front of the lens barrel 63 are exposed to the outside, so manual focusing can be easily performed and You can also make full use of advanced shooting techniques that would not be possible otherwise.

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 photographing lens and a photoelectric conversion means are provided. A lens barrel held integrally, a cabinet that covers a part of the lens barrel to expose it, a first position that covers the lens barrel exposed from the cabinet, and a second position that exposes a part of the lens barrel. a hood that reciprocates between positions, a rotational support means that rotatably supports the lens barrel in a panning direction or a pitching direction, and a locking means that locks the lens barrel so that it does not rotate; an operating means for switching between the non-lock mode and the lock mode; and when the operating means is switched to the non-lock mode, the hood is
a control means for controlling the hood to move to the second position to cover the lens barrel, and to move the hood to the second position to expose a part of the lens barrel when the operating means is switched to the lock mode. As a result, the entire photographic device is small and lightweight, making it easy to take handheld photographs. In addition, since the lens barrel is covered by the hood when in the non-lock mode, the operator's fingers or other objects may inadvertently touch the lens barrel and prevent the lens barrel from rotating, which is necessary to prevent image blur. Nothing happens. Therefore, the photographer can use the image blur prevention function with peace of mind. moreover,
In lock mode, the hood moves to expose a portion of the lens barrel, allowing manual focusing operations. In this lock mode, the lens barrel is locked so that it does not rotate, so the lens barrel does not wobble during manual operation, and stable operation can be easily performed.

[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. 3 is a cross-sectional view taken along line XX in FIG. FIG. 4 is a front view of a conventional photographing device, and FIG. 5 is a side view of the conventional photographing device. 12, 13.14...Focusing lens, 24.25
．． 26...Variable lens, 31...Correction lens, 49...Cabinet, 63...
... Lens barrel, 71.80 ... Magnet,
73, 82... Stator winding, 85... Control circuit, 86.87... Actuator, 90.
...Lock switch, 92 ... Motor, 94 ... Conical recess, 95 ... Lock shaft, 100 ... Hood, 101 ...・・・・・・
・Motor output shaft, 102. 104... Gear, 105... Rack. Name of agent: Patent attorney Toshio Nakao
Dimensions: L/)”J) N5

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, a lens barrel that integrally holds the photographic lens and the photoelectric conversion means, and the lens barrel. a cabinet that covers a portion of the lens barrel, and a hood that moves back and forth between a first position that covers the lens barrel exposed from the cabinet and a second position that exposes a portion of the lens barrel; A rotation support means for rotatably supporting the lens barrel in a panning direction or a pitching direction, a locking means for locking the lens barrel so as not to rotate, and an operation for switching between a non-lock mode and a lock mode. means, the hood moves to the first position to cover the lens barrel when the operating means is switched to a non-lock mode, and the hood moves to the second position when the operating means is switched to the lock mode. and control means for controlling the lens barrel so that a part of the lens barrel is exposed.