JPH0620268B2 - Imaging device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing device.

2. Description of the Related Art In recent years, with the spread of video tape recorders (hereinafter referred to as VTRs), there are more opportunities to shoot with a video camera, and it is possible to perform stable camera work with less image blur even without using a tripod. Video camera is required.

Hereinafter, an example of the above-described conventional imaging device will be described with reference to the drawings. Conventionally, this type of photographing apparatus is shown in FIGS. 8 and 9 as disclosed in, for example, Japanese Patent Laid-Open No. 53-64175.
It had the structure shown in the figure. FIG. 8 is a front view of a conventional photographing device, and FIG. 5 is a side view. In FIGS. 8 and 9, there is a rotor case 1 having a rotor that rotates at a high speed as a direction gyro, which is supported by a horizontal gimbal 3 on left and right horizontal shafts 2. It is supported by a vertical gimbal 5 on its gimbal shaft 4. Similarly, in the vertical gyro, the center rotor case 6 is supported by the horizontal gimbal 7 and the vertical gimbal 8, and the video camera 9 and the like are installed on the rotor case 6.

Problems to be Solved by the Invention However, in the above-described configuration, since the gyro that rotates at high speed is used, the device becomes large in size and the weight also increases. Therefore, normally, the entire device must be installed and used. In addition to the problem of lack of mobility, when handheld shooting is performed and it is not necessary to prevent image blur, it is sufficient to stop the image blur prevention means such as a gyro. There is a problem in that it is difficult to set a desired shooting direction because the effect is lost, the stability of the horizontal gimbals 3 and 7 and the vertical gimbals 5 and 8 is lost, and the video camera becomes unstable.

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 electric signal, and a photographing lens and the photoelectric conversion means are integrated so that their optical axes coincide with each other. Holding means for holding the holding means, a turning support means for turning and holding the holding means so as to be turnable in a panning direction or a pitching direction, a fixing portion of the turning support means, and an exterior covering the holding means and the turning support means. A non-rotating portion of the camera body, which includes a camera body, an engaging portion for locking the holding means provided in the holding means, and an engaged portion for engaging the engaging portion and locking the holding means. When locked, the optical axis of the taking lens and the apparent taking axis of the camera body are arranged to be substantially the same.

Effect The present invention does not use a large and heavy gyro as in the related art due to the above-mentioned configuration, so that it is easy to make the device small and lightweight, and the photographer can use it by hand.
Also, by locking, the shooting axis of the camera body and the optical axis of the shooting lens coincide with each other, so you can shoot without a sense of discomfort even after locking. Furthermore, by locking the lens barrel when carrying it, the lens barrel does not come into contact with the exterior and can be carried with ease.

Embodiment Hereinafter, an image pickup apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a photographing device, and FIG.
1 is a sectional view taken along line XX of FIG. 1, FIG. 3 is a partial sectional view of a locking mechanism portion according to a second embodiment, and FIG. 4 is a partial sectional view of a locking mechanism portion according to a third embodiment. FIG. 6 is a detailed view of the cam portion of FIG. 4, FIG. 6 is a side view of the lock mechanism portion according to a fourth embodiment, and FIG. 7 is a view taken along the line YY in FIG.

In FIGS. 1 and 2, a taking lens 21 for taking an image of a subject and an image taking element 22 such as a CCD provided on the focal plane of the taking lens are held by a lens barrel 23. Also,
The electric signal converted from the optical image by the photographing element 22 is converted into a predetermined video signal by the video circuit 24. Lens barrel 23
Ball bearings 25 and 26 are respectively press-fitted into the upper portion 23a and the lower portion 23b of the first frame 27. Rotating shafts 28 and 29 are rotatably fitted to the ball bearings 25 and 26 from above and below the first frame 27, respectively. The cage lens barrel 23 is rotatable with respect to the first frame 27. Further, a ring-shaped magnet 31 which is magnetized as required is fixed to a lower portion 23b of the lens barrel 23 via a back plate 30 made of a magnetic material. A stator winding 33 adhered to a stator flat plate 32 made of a magnetic material is fixed to the first frame 27 so as to face the magnet 31.

Further, in order to detect the rotational position of the lens barrel 23, a hall element 32a is provided on the stator flat plate 32 so as to face the magnet 31. Ball bearings 34 and 35 are press-fitted into the left and right sides of the first frame 27, and rotary shafts 37 and 38 are rotatably fitted into the ball bearings 34 and 35 from the left and right sides of the second frame 36, respectively. The cage lens barrel 23 and the first frame 27 are rotatable with respect to the second frame 36. Also,
On the right side of the first frame 27, a ring-shaped magnet 40 magnetized as required is fixed via a back plate 39 made of a magnetic material. A stator winding 42 adhered to a stator flat plate 41 made of a magnetic material is fixed to the second frame 36 so as to face the magnet 40. Further, in order to detect the rotational positions of the first frame 27 and the lens barrel 23 in the tilting direction, a fixed plate 41 facing the magnet 40 is provided.
Is provided with a hall element 41a. An angular velocity sensor 43 for detecting the angular velocity in the panning direction is fixed to the lens barrel 23, and the angular velocity in the tilting direction of the lens barrel 23 and the first frame 27 is detected in the first frame 27. The angular velocity sensor 44 for doing so is fixed. The control circuit 45 so that the output signals of the angular velocity sensors 43 and 44 become zero, the actuator 46 including the magnet 31 and the stator winding 33 for rotating the lens barrel 23 in the panning direction, the lens barrel 23, First frame
An actuator 47 composed of a magnet 40 and a stator winding 42 for rotating the 27 in the tilting direction is drive-controlled.

Further, when locking the lens barrel 23, a support member 51 having a female screw 50 is provided on the outer casing 52, has a male screw 53 which is screwed to the female screw 50, and faces the lens barrel 23. By rotating the lock shaft 54, which has a spherical end shape in the direction of rotation, in the right-hand screw direction, the lock shaft 54 moves in the optical axis direction (direction of arrow H) using the female screw 50 and the male screw 53 as guides. The conical recess 55 provided at the rear of the lens barrel 23.
And the lens barrel 23 is locked. The conical recess 55 is sized so that it can come into contact with the lock shaft 54 anywhere in the range of rotation of the lens barrel 23. By rotating the lock shaft 54 in the left-hand screw direction, the lock shaft 54 moves in the optical axis direction (the direction opposite to the arrow H) using the female screw 50 and the male screw 53 as guides, and is provided at the rear portion of the lens barrel 23. Further, the lens barrel 23 is unlocked and separated from the conical recess 55, and image blurring can be prevented.

Further, the lock shaft 54 is provided with a switch pressing portion 56, and the switch pressing portion 56 automatically turns on and off the switch 57 fixed to the support member 51 as the lock shaft 54 moves.
By performing FF, the power supply to the actuators 46 and 47 is automatically controlled.

Regarding the imaging device configured as described above, the first
The operation will be described with reference to FIGS.

When hand-held shooting is performed with a video camera, the video camera shakes due to camera shake or fatigue, which causes shaking of a shot image (so-called image blur). The vibration of the lens barrel 23 caused by this video camera is detected by the angular velocity sensor 43 (panning direction), 44
(Tilting direction), the control circuit 45 supplies power to the stator windings 33, 42 of the actuators 46, 47 so that the outputs from the angular velocity sensors 43, 44 become zero. Since the lens barrel 23 does not shake with respect to the absolute coordinates, it is possible to reduce the image blur in the horizontal and vertical directions. For example, if the lens barrel 23 shakes in the tilting direction (the direction of arrow I in FIG. 1), an angular velocity sensor that detects the shake in the tilting direction.
The control circuit 45 supplies power to the stator winding 42 of the actuator 47 so that the output of 44 becomes zero, and the drive control is performed in the direction opposite to the arrow I direction, whereby image blurring in the tilting direction can be prevented. . Image blurring can be similarly prevented in the panning direction. When image blurring occurs in the diagonal direction, the angular velocity sensor 43 (panning direction) and the angular velocity sensor 44 (tilting direction) detect the shake amount (angular velocity), and the angular velocity sensors 43 and 44 in both directions detect The control circuit 45 supplies power to the stator windings 33 and 42 of the actuators 46 and 47 so that the output becomes zero, so that image blurring in an oblique direction can be prevented.

When carrying around or turning off the image blur prevention effect,
Female thread can be obtained by rotating the lock shaft 54 in the right-hand screw direction.
50, the lock shaft 54 moves in the optical axis direction (direction of arrow H) using the male screw 53 as a guide, contacts the conical recess 55 provided at the rear portion of the lens barrel 23, and locks the lens barrel 23. To do. At this time, the switch pressing portion 56 provided on the lock shaft 54 turns on the switch 57 so that the actuators 46, 47 are
Power supply is cut off to reduce power consumption.
Further, by rotating the lock shaft 54 in the left-hand screw direction, the lock shaft 54 moves in the optical axis direction (the direction opposite to the arrow H) using the female screw 50 and the male screw 53 as guides, and the lock shaft 54 is moved to the rear part of the lens barrel 23. The lens barrel 23 is separated from the conical recess 55 provided.
Is unlocked. At this time, the switch pressing portion 56 provided on the lock shaft 54 turns off the switch 57 to supply power to the actuators 46 and 47, and the image blur prevention state is set.

Next, another embodiment will be described with reference to FIGS.

First, FIG. 3 is a partial cross-sectional view of the lock mechanism part, in which a shaft 70 is provided at the rear part of the lens barrel 23, and a male screw 72 provided on the lock shaft 71 is screwed to the exterior 52, and a female screw to be engaged therewith. A support member 74 having 73 is provided. When the lock shaft 71 is rotated, the shaft 70 and the conical recess 75 provided in the lock shaft 71 come into contact with each other, so that the lens barrel 23 is locked. Further, when the lens barrel 23 is locked, the lens barrel 23 is automatically moved by the shaft 70 and the conical recessed portion 75 to the photographing axis of the main body and the lens barrel 23.
It is configured so that it coincides with the optical axis of.

Next, description will be made with reference to FIGS. 4 and 5.

A conical recess 80 is provided at the rear of the lens barrel 23, and a lock shaft 81 that contacts the conical recess 80 and locks the lens barrel 23 slides on a support member 82 provided on the exterior 52. It is possible. Inside the support member 82 is a spring 83 that urges the lock shaft 81 toward the conical recess 80. Lock shaft 81
A cam pin 84 that engages with the cam grooves 82a and 82b provided in the support member 82 is screwed into this. A lock knob 85 is fixed to the lock shaft 81 with a screw 86.

The operation will be described below.

The cam pin 84 fixed to the lock shaft 81 is engaged with the cam groove 82b portion provided in the support member 82, and at this time, it is in the unlocked state. Here, when the lock knob 85 is rotated in the right-hand screw direction, the cam pin 84 changes from the engagement state with the cam groove 82b to the engagement state with the cam groove 82a. Since the lock shaft 81 is biased toward the conical recess 80 by the spring 83, the cam pin 84 moves along the cam groove 82a. As a result, the lock shaft 81 abuts the conical recess 80 to lock the lens barrel 23.

Next, another embodiment will be described with reference to FIGS.

A shaft 90 is planted at the rear of the lens barrel 23. The lock members 91 and 92 are screwed with the lock screw 93. The lock screw 93 has a right-hand thread where it is screwed with the lock member 91 and a left-hand thread where it is screwed with the lock member 92. By rotating the lock screw 93 in the right-hand screw direction, the lock members 91 and 92 are rotated to the shaft 90. Lock. A guide shaft 94 is engaged with the lower side of the lock members 91 and 92,
And 92 position regulation is done.

As described above, according to the present embodiment, the photographing lens for photographing a subject, the photoelectric conversion unit for converting an optical image from the photographing lens into an electric signal, and the photographing lens and the photoelectric conversion unit have the same optical axis. Holding means for integrally holding the holding means, rotation supporting means for rotatably supporting the holding means so as to be rotatable in the panning direction or the pitching direction, a fixing portion of the rotation supporting means, the holding means, and the rotation supporting means. Non-pivot of the camera body includes a camera body including an exterior covering, an engaging portion for locking the holding means provided on the holding means, and an engaged portion for engaging the engaging portion and locking the holding means. Since the optical axis of the shooting lens and the apparent shooting axis of the camera body are made to be approximately the same when it is installed in the camera and locked, the entire shooting device is compact and lightweight, making it easy to hold. Can operate . In addition, since the shooting axis of the camera body and the optical axis of the shooting lens coincide with each other when locked, it is possible to shoot without a sense of discomfort even after locking. Furthermore, by locking the lens barrel when carrying it, the lens barrel does not come into contact with the exterior and can be carried with ease. In the present embodiment, the lock mechanism is formed at the rear of the lens barrel, but it may be anywhere as long as the lens barrel can be locked.
For example, there is a portion 23a in FIG. 1 of the lens barrel.

EFFECTS OF THE INVENTION As described above, in the photographing apparatus of the present invention, a photographing lens for photographing a subject, a photoelectric conversion unit for converting an optical image from the photographing lens into an electric signal, and a photographing lens and the photoelectric conversion unit are optically operated. Holding means for integrally holding the holding means so that their axes coincide with each other, rotation supporting means for rotatably supporting the holding means so as to be rotatable in the panning direction or the pitching direction, a fixing portion of the rotation supporting means, and a holding means. The camera body includes a camera body including an exterior covering the dynamic support means, an engagement portion for locking the holding means provided in the holding means, and an engaged portion for engaging the engagement portion and locking the holding means. Since the optical axis of the shooting lens and the apparent shooting axis of the camera body are made to be approximately the same when it is locked and installed in the non-rotating part, the entire shooting device is compact and lightweight. Feel free to use can do. In addition, since the shooting axis of the camera body and the optical axis of the shooting lens coincide with each other when locked, it is possible to shoot without a sense of discomfort even after locking. Furthermore, by locking the lens barrel when carrying it, the lens barrel does not come into contact with the exterior and can be carried with ease.

[Brief description of drawings]

1 is a block diagram of an image pickup apparatus according to the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, FIG. 3 is a partial sectional view of a lock mechanism portion according to a second embodiment, and FIG. Third of the mechanical section
FIG. 5 is a detailed view of the cam portion in FIG. 4, FIG. 6 is a side view of the lock mechanism portion in the fourth embodiment, and FIG. 7 is YY in FIG. 8th view
FIG. 9 is a front view of a conventional photographing device, and FIG. 9 is a side view of the conventional photographing device. 23 …… Lens barrel, 54.71.81. …… Lock axis, 55.75.80
... Conical recess

Claims (1)

[Claims] 1. A photographic lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographic lens into an electric signal, and the photographic lens and the photoelectric conversion means are integrated so that their optical axes coincide with each other. Holding means for holding the holding means, a rotation supporting means for rotatably supporting the holding means in a panning direction or a pitching direction, a fixing portion of the rotation supporting means, the holding means, and the rotation supporting means. An engaged portion for locking the holding means by engaging with the engaging portion, the camera body including an exterior covering, and an engaging portion provided on the holding means for locking the holding means. Is provided in a non-rotating portion of the camera body, and when locked, the optical axis of the photographing lens and the apparent photographing axis of the camera body are configured to be substantially the same.