JPH0619257Y2 - Imaging device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a photographing device. With the spread of video tape recorders (hereinafter referred to as VTRs) in recent years, there have been more and more opportunities to shoot with a video camera, and it is possible to perform stable camera work with less blur even without using a tripod. Is required.

2. Description of the Related Art Hereinafter, an example of the above-described conventional imaging device will be described with reference to the drawings. Conventionally, a photographing apparatus of this type has a structure as shown in FIGS. 5 and 6, for example, as disclosed in Japanese Patent Laid-Open No. 53-64175. FIG. 5 is a front view of a conventional photographing apparatus, and FIG. 6 is a side view. Fifth
In FIGS. 6 and 6, there is a rotor case 1 having a rotor that rotates at a high speed as a center as a direction gyro,
This is supported by a horizontal gimbal 3 on left and right horizontal shafts 2, and the horizontal gimbal 3 is supported on a vertical gimbal 5 by left and right gimbal shafts 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-mentioned 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, if you do hand-held shooting and you do not need to prevent image blur, you can stop the image blur prevention means such as a gyro. Since the horizontal gimbals 3 and 7 and the vertical gimbals 5 and 8 become unstable and the video camera becomes unstable, there is a problem that it is difficult to determine the desired shooting direction.

Means for Solving the Problems In order to solve the above problems, the present invention provides a photographing lens for photographing a subject, a photoelectric conversion unit for converting an optical image from the photographing lens into an electric signal, a photographing lens and a photoelectric conversion unit. Holding means for integrally holding the means and having an elastic member externally fitted to the holding means, rotation supporting means for rotatably supporting the holding means so as to be rotatable in the panning direction and the pitching direction, and the protruding portion. It is composed of a plurality of thin plates that hold the optical axis of the photographing lens in the substantially center of the rotation range of the holding means and lock the protrusions.
The driving means is configured to drive the sandwiching means having an elastic force locking member that elastically locks the protruding portion on at least one of the thin plates.

Effects The present invention does not use a large and heavy gyro as in the related art due to the above-described configuration, so that it is easy to configure a small size and light weight, and a photographer can use it by hand.
Also, by locking the lens mirror copper, the shooting axis of the camera body and the optical axis of the shooting lens match, so you can shoot without a sense of discomfort even after locking. When carrying the lens mirror copper, the lens mirror copper is locked to the camera body so that the lens mirror copper does not come into contact with the exterior or the like 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 the entire imaging device,
FIG. 2 is a sectional view taken along line XX of FIG.

First, the overall configuration of the photographing apparatus will be described with reference to FIGS. 1 and 2.

In FIGS. 1 and 2, a taking lens 21 for taking an image of a subject and an image pickup device 22 such as a CCD provided on the focal plane of the taking lens are held by a lens mirror copper 23.
Further, the electric signal converted from the optical image by the image pickup device 22 is converted into a predetermined video signal by the video circuit 24. The ball bearings 25 and 26 are press-fitted into the upper portion 23a and the lower portion 23b of the lens mirror copper 23, respectively.
Rotating shafts 28 and 29 from above and below the ball bearings 25 and 2 respectively.
6 is rotatably fitted to the lens mirror copper 23,
It is rotatable with respect to the frame 27. Also,
A ring-shaped magnet 31 which is magnetized as required is fixed to a lower portion 23b of the lens mirror copper 23 through 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 mirror copper 23, the Hall element 3 is provided on the stator flat plate 32 so as to face the magnet 31.
2a is provided. Ball bearings 34 and 35 are press-fitted into the left and right of the first frame 27, respectively, and rotary shafts 37 and 38 are rotatably fitted to the ball bearings 34 and 35 from the left and right of the second frame 36, respectively. The lens mirror copper 23 and the first frame 27 are rotatable with respect to the second frame 36. In addition, the first frame 27
A ring-shaped magnet 40, which is magnetized as required, is fixed to the right side of the 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 mirror copper 23 in the pitching direction, the stator flat plate 41 is provided with a Hall element 41a facing the magnet 40. An angular velocity sensor 43 for detecting the angular velocity in the panning direction is fixed to the lens mirror copper 23, and the first frame 27 detects the angular velocity in the pitching direction between the lens mirror copper 23 and the first frame 27. Angular velocity sensor 44 for
Is fixed. The control circuit 45 controls the actuator 46 including the magnet 31 and the stator winding 33 that rotate the lens mirror copper 23 in the panning direction so that the output signals of the angular velocity sensors 43 and 44 become zero.
A magnet 40 and a stator winding 42 for rotating the lens mirror copper 23 and the first frame 27 in the pitching direction.
The actuator 47 composed of is driven and controlled.

Next, a configuration for locking (or unlocking) the lens mirror copper 23 will be described with reference to FIGS. 1 and 3.

The control circuit 4 is turned on by turning on the lock switch 50.
5, the hole 51a for restricting the rotation range of the lens mirror copper 23
The electric power is supplied to the motor 52 fixed to the lock base 51 having the motor, and the motor 52 rotates. This motor 5
The worm gear 52a in which the rotating force of 2 is press-fitted into the rotating shaft of the motor 52 and the shaft 5 planted in the lock base 51
It is transmitted to the lock cam 56 provided on the cam shaft 55 planted on the lock base 51 through the two-stage gear 54 provided on the No. 3.

A gear portion that meshes with the small-diameter gear of the two-stage gear 54 is provided on the outer periphery of the lock cam 56, and cam followers 57a and 58a planted on the lock levers 57 and 58 are fitted on the front and back surfaces. Lock levers 57, 58
Are provided with cam grooves 56a and 56b for guiding the movement.

The lock lever 57 is the shaft 5 planted on the lock base 51.
With 9 as the center of rotation, it moves while being guided by a cam groove 56a provided on the back surface of the lock cam 56. Further, the lock lever 58 moves while being guided by a cam groove 56b provided on the surface of the lock cam 56, with a shaft 59 planted in the lock base 51 as a rotation center. Further lock lever 58
A shaft 60 is planted on the lever 60, and a lever 61 is urged by a spring 62 around the shaft 60 in the direction of the center of the rotation range of the lens mirror copper 23. In the unlocked state, the lever 61 is regulated to rotate by a stopper pin 58b planted in the lock lever 58.

The two lock levers 57 and 58 are guided by the cam grooves 56a and 56b of the lock cam 56 and rotate about the shaft 59 as a rotation shaft, and the state shown in FIG. 3 changes to the state shown in FIG. 23 is provided at the rear portion of the lock lever 57,
Locking can be performed by sandwiching the lock pin 63, which has the rubber ring 63a fitted to the place where it is engaged with 58, between the two lock levers 57 and 58. Further, since the lock pin 63 is biased toward the center of the rotation range of the lens mirror copper 23 by the lever 61, it is possible to maintain a stable locked state without play.

Regarding the imaging device configured as described above, the first
The operation will be described with reference to FIG. 2, FIG. 3, FIG. 3, and FIG.

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 sway of the lens mirror copper 23 caused by this video camera is detected by the angular velocity sensors 43 (panning direction) and 44 (pitching direction), and the control circuit 45 sets the actuator 46 so that the outputs from the angular velocity sensors 43 and 44 become zero. , 47 the stator windings 33, 42 are supplied with power to control the horizontal movement of the lens mirror copper 23 with respect to absolute coordinates.
Vertical image blurring can be reduced. For example, if the lens mirror copper 23 sways in the pitching direction (direction of arrow I in FIG. 1), the control circuit 45 causes the stator of the actuator 47 so that the output of the angular velocity sensor 44 for detecting the sway in the pitching direction becomes zero. Winding 4
Image blurring in the pitching direction can be prevented by supplying electric power to 2 and controlling the drive in the direction opposite to the arrow I direction. Similarly, in the panning direction, image blur can be prevented. When the image blurring occurs in the diagonal direction, the angular velocity sensor 43 (panning direction) and the angular velocity sensor 44 (pitching direction) detect the shake amount (angular velocity) and output from the angular velocity sensors 43 and 44 in both directions. Since the control circuit 45 supplies electric power to the stator windings 32 and 33 of the actuators 46 and 47 so that the value becomes zero, it is possible to prevent image blurring in an oblique direction.

When carrying or when turning off the image blur prevention effect (when locking), when the lock switch 50 is turned on, the control circuit 45 supplies electric power to the motor 52 to rotate the motor 52. The rotational force of the motor 52 is transmitted to the lock cam 56 via the worm gear 52a and the two-stage gear 54, and the lock cam 56 rotates in the direction of arrow F (in FIG. 3), whereby the lock lever 5
7, 58 with the shaft 59 as the center of rotation, the cam grooves 56a,
Guided by 56b, the lock pin 63 is pinched while being moved to the center of the rotation range of the lens mirror copper 23, and the state shown in FIG. 4 is obtained. Further, at the lock position, since the lock pin 63 is biased by the spring 62 toward the center of the rotation range of the lens mirror copper 23 by the lever 61, the cam groove and the cam follower are dispersed, and the rubber ring is deformed. It is possible to prevent looseness caused by such things as a stable lock.

When unlocking (turning on the image blur prevention effect), electric power is supplied from the control circuit 45 to the motor 52 so that the lock cam 56 rotates in the direction of arrow G in FIG. 4, and the lock levers 57 and 58 rotate. The lens mirror copper 23 is unlocked.

As described above, according to the present embodiment, the photographing lens for photographing the subject, the photoelectric conversion unit for converting the optical image from the photographing lens into an electric signal, the photographing lens and the photoelectric conversion unit are integrally held, Further, a holding means having a protruding portion to which an elastic member is fitted, a rotation supporting means for rotatably supporting the holding means in a panning direction and a pitching direction, and an optical axis of the photographing lens sandwiching the protruding portion. Clamping means including a plurality of thin plates that lock the protrusions at approximately the center of the rotation range of the holding means, and an elastic force locking member that elastically locks the protrusions to at least one of the thin plates. By being composed of the driving means for driving the sandwiching means, the entire photographing apparatus becomes small and lightweight, and handheld photographing can be carried out easily.

Since the lock structure is a lever system, it can be made thin. Further, by fitting the rubber ring onto the lock pin, the noise at the time of locking can be reduced.
Further, by locking, the shooting axis of the camera body and the optical axis of the shooting lens coincide with each other, so that shooting can be performed without a sense of discomfort even after locking, and the lens mirror copper does not come into contact with the exterior or the like and can be carried with ease.

As described above, the photographing lens for photographing the subject, the photoelectric conversion means for converting an optical image from the photographing lens into an electric signal, the photographing lens and the photoelectric conversion means are integrally held, and the elastic member is provided. Holding means having a projecting portion fitted on the outside, rotation supporting means for rotatably supporting the holding means in a panning direction and a pitching direction, and a holding means for holding the optical axis of the photographing lens by sandwiching the projecting portion. A clamping means having a plurality of thin plates for locking the protrusions and having an elastic force locking member for elastically locking the protrusions to at least one of the thin plates is provided at substantially the center of the rotation range. By being configured with the driving means for driving, the overall size and weight of the image pickup apparatus can be reduced, and handheld image pickup can be easily performed when image blur prevention is not performed. 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 carry out shooting without a sense of discomfort even after locking, and it is possible to carry the lens mirror copper without worrying about contact with the exterior or the like. Also, by locking and locking the lock pin provided on the lens mirror copper with the lever, it is possible to reduce the thickness and simultaneously lock the two degrees of freedom in one operation, and further control the lever. By having a control circuit that operates, it is possible to lock or unlock in conjunction with the lock switch,
The operability can be improved.

By externally fitting the rubber ring to the lock pin, the noise at the time of locking can be reduced. Further, by biasing the lock pin with the spring at the time of locking, it is possible to prevent looseness due to variations in the cam groove and the cam follower, deformation of the rubber ring, and the like, and stable locking can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram of an image pickup apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is an arrow view of FIG. 4 and 5 are a front view of the conventional photographing device and a side view of the conventional photographing device, respectively. 21 ... Photography lens, 22 ... CCD, 23 ... Lens mirror copper, 45 ... Control circuit, 52 ... Motor, 56 ...
Lock cams, 56a, 56b ... Cam grooves, 57, 58 ...
… Lock lever, 61 …… Lever, 62 …… Spring, 63
...... Lock pin, 63a …… Rubber ring.

Claims (1)

[Scope of utility model registration request] 1. An elastic member for integrally holding the photographing lens for photographing an object, a photoelectric conversion means for converting an optical image from the photographing lens into an electric signal, the photographing lens and the photoelectric conversion means. Holding means having a projecting portion fitted on the outside, rotation supporting means for rotatably supporting the holding means in a panning direction and a pitching direction, and an optical axis of the photographing lens sandwiching the projecting portion. A plurality of thin plates that lock the protrusions are provided at approximately the center of the rotation range of the holding means, and at least one of the thin plates has an elastic force locking member that elastically locks the protrusions. An imaging device comprising a holding means and a driving means for driving the holding means.