JPH0789654B2 - 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 stable camera work can be performed without blurring the image 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, a photographing apparatus of this type is shown in FIG. 6 as disclosed in, for example, Japanese Patent Laid-Open No. 53-64175.
The structure was as shown in Fig. 7. FIG. 6 is a front view of a conventional photographing apparatus, and FIG. 7 is a side view. In FIGS. 6 and 7, 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 the left and right horizontal shafts 2. Gimbal axis 4 for vertical gimbal 5
Supported by. 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, with the above-described configuration, the image stabilization state of the video camera is not displayed, and therefore the operability is not good for the photographer. Also, since the gyro that rotates at high speed is used, the device becomes large and the weight also increases, so normally the entire device must be installed and used, and it lacks maneuverability. When it is not necessary to do so, it is sufficient to stop the surface shake prevention means such as a gyro, but when it is stopped, the gyro effect disappears and the horizontal gimbals 3 and 7 and the vertical gimbals 5 and 8 become unstable and the video camera becomes unstable However, there is a problem that it is difficult to set the desired shooting direction because it is in such a state.

Means for Solving the Problems In order to solve the above problems, the present invention relates to 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 photoelectric conversion. Holding means for integrally holding the means, rotation supporting means for rotatably supporting the holding means in the panning direction (or pitching direction), locking means for locking the holding means to the camera body, and locking The detection means for detecting whether the means has locked the holding means, the state of the lock means detected by the detection signal from the detection means, and the photographed image from the photoelectric conversion means are displayed so that they can be viewed substantially at the same time. And a display means for performing the operation.

Action The present invention does not use a large and heavy gyro as in the conventional structure due to the above-described configuration, and thus can be easily configured to be small and lightweight. Then, by displaying that the lens barrel is locked to the camera body on the screen of the electronic viewfinder (hereinafter referred to as EVF) or monitor, or near the screen of the EVF, the photographer can Since the locked state can be confirmed on the screen or on the display near the screen of the EVF, operability can be improved.

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 image capturing 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 taking element 22 such as a CCD provided on the focal plane of the taking lens are held by a lens barrel 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. Ball bearings 25 and 26 are press-fitted into the upper portion 23a and the lower portion 23b of the lens barrel 23, respectively.
8 and 29 are rotatably fitted to the ball bearings 25 and 26, and the lens barrel 23 is rotatable with respect to the first frame 27. Further, a ring-shaped magnet 31 that 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. That magnet
A stator winding 33 bonded to a stator flat plate 32 made of a magnetic material is fixed to the first frame 27 facing each other.

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 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 link-shaped magnet 40 that is 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, the stator flat plate faces the magnet 40.
The hall element 41a is provided at 41. Lens barrel 23
Is fixed with an angular velocity sensor 43 for detecting the angular velocity in the panning direction. In the first frame 27, the angular velocity for detecting the angular velocities of the lens barrel 23 and the first frame 27 in the tilting direction is fixed. The sensor 44 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.

To lock the lens barrel 23, use the lock switch 50.
When turned on, electric power is supplied from the control circuit 45 to the motor 52 fixed to the lock base 51, and the motor 52 rotates. The rotational force of the motor 52 is transmitted to the lock gear 56 provided on the lock shaft 55 via a reduction mechanism including idler gears 53 and 54 provided on the lock base 51. Lock shaft 55
Is slidably engaged with the support member 57, and the cam groove 57a provided on the support member 57 engages with the cam pin 55a provided on the lock shaft 55 to guide the operation of the lock shaft 55. There is.

The end shape of the lock shaft 55 is spherical, and the optical axis of the lens barrel 23 and the direction of the camera body with respect to the subject are aligned by abutting on a conical recess 58 provided in the rear portion of the lens barrel 23. Lock the lens barrel 23 so that The conical recess 58 provided at the rear of the lens barrel 23 is
It has such a size as to come into contact with the lock shaft 55 in the rotation range of.

When the lock is completed, the rotation amount detector 52a that selects the rotation amount of the motor 52 attached to the motor 52 is used to rotate the lens barrel 2
3 detects that the camera has been locked by the camera body, and the detection signal causes the third signal to appear on the EVF62 screen or near the screen.
By displaying as shown in FIG. 4, FIG. 5, and FIG. 5, the photographer can determine whether the lens barrel 23 is locked or not by the display on the screen of the EVF 62 or in the vicinity of the screen, and Operability is improved.

3, 4, and 5 will be described in detail.

First, in FIG. 3, the rotation amount detecting device 52a detects that the lens barrel 23 is locked, and the lens barrel 23 is detected.
The lock state of “LOC” is displayed on the EVF62 screen by the control circuit 45.
It is displayed by the character "K". Also, when unlocked, this display disappears.

In this embodiment, the letters "LOCK" are displayed, but any letters can be used as long as the letters indicate the locked state of the lens barrel 23. For example, "L".

Next, in FIG. 4, the display of the locked state of the lens barrel 23 is displayed near the screen of the EVF62 with the word "LOCK", and the lens barrel 23 is locked on the screen of the EVF62. At times, the locked state of the lens barrel 23 is displayed by displaying dots or lines.

In FIG. 5, the display of the locked state of the lens barrel 23 is shown.
The LED 62b is provided near the screen of the EVF 62 so that the LED 62b is turned on (or turned off) when the lens barrel 23 is locked.

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
The lens barrel 23 with respect to the absolute coordinates is controlled by supplying power to the stator windings 33 and 42 so that the outputs from the angular velocity sensors 43 and 44 are zero when detected by (tilting direction). There is no shaking of the image and horizontal and vertical image blur can be reduced. For example, if the lens barrel 23 swings in the tilting direction (direction of arrow I in FIG. 1), the control circuit 45 controls the actuator 47 so that the output of the angular velocity sensor 44 for detecting the swinging in the tilting direction becomes zero. By supplying electric power to the stator winding 42 to control the drive in the direction opposite to the arrow I direction, it is possible to prevent image blurring in the tilting direction. Similarly, in the panning direction, image blur can be prevented. 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 Control circuit 45 so that the output becomes zero
By supplying power to the stator windings 33, 32 of the actuators 46, 47, it is possible to prevent image blur in an oblique direction.

When carrying or when turning off the image blur prevention effect, 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 gear 56 provided on the lock shaft 55 via the reduction mechanism including the idler gears 53 and 54, and the cam pin 55a provided on the lock shaft 55 has the cam groove 57a of the support member 57.
The lock shaft 55 is moved in the optical axis direction (direction of arrow H) by using the guide as a guide, and the lock shaft 55 is brought into contact with the conical recess 58 provided in the rear portion of the lens barrel 23 to lock the lens barrel 23 on the camera body. To do. The completion of the lock operation is determined by the rotation speed detection device 52a when the motor 52 stops rotating after the motor 52 rotates counterclockwise as viewed from the direction J in FIG. Further, when the motor 52 stops rotating after rotating clockwise in the direction J in FIG. 1, it is determined that the motor 52 is in the unlocked state. When the lock is completed, the control circuit 45 shuts off the power supply to the actuators 46, 47 and the motor 52, and the lens barrel 23
The lock status of is displayed on the EVF62 screen.

Also, when turning on the image blur prevention effect, turn off the lock switch 50, and the control circuit 45 causes the motor 52
Power is supplied to the motor 52 to rotate the motor 52. Motor 52
Is transmitted to the lock gear 56 provided on the lock shaft 55 through the reduction mechanism including the idler gears 53, 54, and the cam pin 55a provided on the lock shaft 55 uses the cam groove 57a of the support member 57 as a guide. In the optical axis direction (direction opposite to arrow H)
To move the lock shaft 55 and the conical recess 58 provided in the rear portion of the lens barrel 23 to separate from each other, and the lens barrel 23 is unlocked. Then, the control circuit 45 erases the display of the locked state of the lens barrel 23 displayed on the screen of the EVF 62 or performs the unlock display, and the actuator 46,
Power is supplied to 47 to prevent image blur.

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, and the holding unit for integrally holding the photographing lens and the photoelectric conversion unit. Means, rotation support means for rotatably supporting the holding means in the panning direction (or pitching direction), locking means for locking the holding means to the camera body, and whether the locking means has locked the holding means. By configuring the detecting means for detecting whether or not and the display means for indicating that the lock means has locked the holding means by the detection signal from the detecting means, the whole photographing apparatus becomes small and lightweight, and handheld photographing is easily performed. You can do it.

Also, by displaying that the lens barrel is locked to the camera body on the screen of the electronic viewfinder (hereinafter referred to as EVF) or monitor, or near the EVF, the photographer can lock the lens barrel. Can be confirmed on the screen or on the display near the EVF, so the operability can be improved.

In this embodiment, the lock of the lens barrel is detected by detecting the rotation direction and the number of rotations of the motor 52, but in the vicinity of the lock shaft, the lock shaft is moved out to lock the lens barrel. Lock detection may be performed by providing a switch that turns on or off when the lens barrel is locked.

EFFECTS OF THE INVENTION As described above, a taking lens for taking an image of a subject, a photoelectric conversion means for converting an optical image from the taking lens into an electric signal, and a holding means for integrally holding the taking lens and the photoelectric conversion means, Rotation support means for rotatably supporting the holding means rotatably in the panning direction (or pitching direction),
Locking means for locking the holding means to the camera body, detecting means for detecting whether or not the locking means has locked the holding means, state of the locking means detected by the detection signal from the detecting means, and photoelectric conversion means By configuring the display unit to display the captured image so that they can be viewed substantially at the same time, the overall size of the image capturing apparatus becomes smaller and lighter, and handheld image capturing can be performed easily. In addition, the electronic viewfinder (hereinafter EV
(F) or on the screen of a monitor or near EVF, the photographer can confirm the locked state of the lens barrel on the screen or near EVF to improve operability. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an image pickup apparatus in one embodiment of the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, FIG. 3, and FIG.
5 and FIG. 5 are E arrow views of the EVF in FIG. 1, FIG. 6 is a front view of a conventional photographing device, and FIG. 7 is a side view of the conventional photographing device. 21 …… Shooting lens, 22 …… CCD, 23 …… Lens barrel, 45
...... Control circuit, 52 …… Motor, 52a …… Rotation speed detection device, 55 …… Lock axis, 62 …… Electronic viewfinder,
62b ... LED.

Claims (1)

[Claims] 1. A photographing lens for photographing an object, a photoelectric conversion means for converting an optical image from the photographing lens into an electric signal, and a holding means for integrally holding the photographing lens and the photoelectric conversion means. A rotation support means for rotatably supporting the holding means in a panning direction or a pitching direction, a locking means for locking the holding means to the camera body, and whether or not the locking means locks the holding means. A detection means for detecting the state of the lock means detected by the detection signal from the detection means, and a display means for displaying the photographed image from the photoelectric conversion means so that they can be seen at the same time in the visual field. apparatus.