JPH0353770A - Camera supporting device - Google Patents

Abstract

PURPOSE:To suppress unrequired rotating motion of a camera due to hand blur of the user when the user supports the camera for the pickup by coupling a rotary shaft of a camera mount part and a support supporting the rotary shaft around its shaft center turnably via an elastic material. CONSTITUTION:The moment of inertial of a coil spring 9 and a movie camera 1 is equivalent to a low pass filter, then the movement of the user of the camera in the panning direction is delivered to the camera 1 but small hand blur by the user does not deliver to the camera 1. Moreover, when there is a possibility of the camera 1 for horizontal vibration depending on the combination of the moment of inertial of the coil spring 9 and the movie camera 1, a damping shaft 11 is fitted between an inner circumferential face of a sleeve 10 and an outer circumferential face of the rotary shaft 4 provided in the vicinity of the rotary shaft 4 to provide a viscous resistance between the both, then the undesired rotating vibration of the camera 1 due to the moment of inertia is prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to cameras used mainly when a user takes pictures by supporting the camera with his or her hand, such as a video camera or a camera-integrated video table recorder. The present invention relates to a support device.

[Conventional Technology] FIG. 6 is a block diagram of a conventional camera support device disclosed in, for example, Japanese Patent Application Laid-Open No. 63-50168. In the figure, 00l} is a lens barrel, and (102) is an imaging device such as a CCD, both of which constitute a video camera. (103) is a support body that supports the lens barrel (101) rotatably around a rotation axis (104).

(105) is an actuator that rotates the lens barrel (101), (106) is an inertial angular velocity detection element, (107)
is an inertial angular velocity detector, (108) is a relative angle detection element,
(109) is a relative angle detector.

(110) is a vanning detector, (111) is an angular velocity control gain switch, (112) is an angle control gain switch, (1
13) is a synthesizer, and (114) is the actuator (1).
05).

Next, the operation of the above configuration will be explained.

Due to the user's camera shake, etc., the support body (103) may move around the rotation axis (
104), the lens barrel (101) also tries to rotate in the same way. At this time, the rotation of the lens barrel (101) is detected as {g by the action of the inertial angular velocity detection element (106) and the inertial angular velocity detector (107). This detection signal (a) is given to the actuator (II) 5) through the combiner (113) and the drive circuit (04), and the lens barrel (101) is controlled by the action of the feedback loop consisting of a series of such operations. Rotation is suppressed and the image is stabilized.

On the other hand, the relative angle detection element (108) and the relative angle detector (109) are connected to the support (103) and the lens barrel (101).
The mutual rotational movement of the two is detected and the damping effect of the feedback loop described above is performed.

Further, the panning detector (110) is composed of a low-pass filter and a window comparator, and the above-mentioned both detection signals (a
), (b), the above support (103
) and the lens barrel (101) exceed a certain value, the angular velocity and angle are adjusted by operating the angular velocity control gain switch (1 1 1) and the angle control gain switch (112). The control gain is switched, and the output signals (C) and (d) are combined in a combiner (113), and the combined signal (
e), the operation of the feedback loop is changed so that the lens barrel (101) is more stable than the support (103) than the stabilization of the image.
) gives priority to following the movement of

[Problems to be Solved by the Invention] Since the conventional camera support device is configured as described above, it has an actuator, an inertial angular velocity and relative angle detector, a panning detector, an angular velocity control gain, an angular control gain switch, a synthesizer It requires many elements to configure the feedback loop, such as a camera and a drive circuit, making the structure complex and costly.It is also heavy and large, making it difficult to handle, especially as a handheld camera support device. There was a problem.

This invention was made to solve the above-mentioned problems, and although it has a simple structure and can be made lightweight and compact, it also prevents unnecessary rotation of the camera due to the user's camera shake. It is an object of the present invention to provide a camera support device capable of suppressing movement and photographing stable images.

[Means for Solving the Problems] A camera support device according to the present invention connects a rotating shaft having a camera mounting portion and a support body rotatably supporting the rotating shaft around its axis via an elastic body. It is characterized by being combined.

[Function] According to the present invention, the elastic body absorbs unnecessary movements such as vibrations and shaking exerted on the support, such as camera shake of the user when the user grips the support and takes a photograph. By relaxing the motion, unnecessary movement of the camera can be suppressed and stable images can be taken.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings.

FIG. 1 is a side view showing the appearance of a camera support device according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main part of FIG. In the figure, (4) is a rotating shaft, and a U-shaped camera mounting part (2) is integrally connected to the upper end of the rotating shaft, and a mounting screw (3) is rotatably attached to this mounting part (2). Retained.

(1) is a movie camera with a tripod mounting pedestal (
16), and a female thread (12) into which the mounting screw (3) can be screwed is formed on the tripod mounting base (16).

(5) is a cylindrical handle that is an example of a support;
The rotating shaft (4) is inserted into this handle (5), and this rotating shaft (4) is supported by a radial bearing (6).
, (7) and a thrust bearing (8) so as to be rotatable around its axis.

(lO) is a sleeve, which is fixed to the upper and lower intermediate parts of the handle (5), and provides viscous resistance between the inner circumferential surface of this sleeve (10) and the outer circumferential surface of the rotating shaft (4). It is filled with brake oil (11).

(9) is a helical spring which is an example of an elastic body, and as clearly shown in FIG. ) is interposed in a thin spiral shape between the handle (5) and the rotation M (4) to elastically connect the rotation shaft (4) to the handle (5). Apply torque to maintain the angle.

Next, the operation of the above configuration will be explained.

As shown in Fig. 1, insert the mounting screw (3) into the female screw (l2) of the movie camera (1) that is in contact with the camera mounting part (2) at the upper end of the rotating shaft (4) as shown in Fig. 2. By screwing the movie camera (1) into the rotating shaft (4)
Fixed to.

In this state, when the camera user grips the handle (5) and supports the entire camera, his/her hand vibrates slightly.
The vibration causes the movie camera (1) to shake in the horizontal and vertical directions.

That is, blurring occurs in the horizontal direction, that is, in the panning direction, and in the vertical direction, that is, in the tilting direction, about an axis perpendicular to a plane parallel to the image pickup device such as a CCD included in the movie camera (1).

The support device configured as described above reduces the vibration in the bang direction. That is, since the movie camera (1) can rotate in the bang direction with respect to the handle (5), it is possible to prevent the shake in the bang direction that occurs in the handle (5) from being directly transmitted to the movie camera (1). I can do it.

However, depending on the will of the camera user, movie cameras (
When the user wants to move 1) in the horizontal direction, the user slowly rotates the handle (5) in the horizontal direction.
The rotation of the handle (5) is transmitted to the rotating shaft (4) via the helical spring (9), and the movie camera (1) can be moved as desired.

As mentioned above, the helical spring (9) and the movie camera (
Since the moment of inertia in 1) forms a low-pass filter, the movement in the panning direction by the camera user will affect the camera (
However, small movements of the camera user's hand are not transmitted to the camera (1).

Furthermore, due to the combination of the helical spring (9) and the moment of inertia of the camera (1), there is a risk that the camera (1) will rotate and vibrate in the horizontal direction. Rotation with the inner peripheral surface of the sleeve (lO) provided! ID! Braking oil (
11) to provide viscous resistance between the two, it is possible to prevent unnecessary rotational vibration of the camera (1) due to moment of inertia.

Figures 4 and 4. FIG. 5 is a front view and a side view of a camera support device according to another embodiment of the present invention.

In the configuration shown in Figure 1, the camera (1) is rotatably supported, so if you touch the camera (1) to operate it or if your face appears in the viewfinder. If the camera (1) comes in contact with the camera (1), there is a possibility that the camera (1) will make unnecessary rotational movements. The camera support device shown in FIGS. 4 and 5 has a configuration to prevent such a problem.

That is, in FIGS. 4 and 5, (l2) is an arm having one end fixed to the handle (5), and a shoe (13) attached to the other end. (14) is a viewfinder fitted and supported by the shoe (l3);
(15) is a lead wire that supplies power and signals from the camera (1) to the viewfinder (14).

In the camera support device configured as shown in FIGS. 4 and 5 above, the hand or face of the camera user is
Since the camera (1) does not touch directly, there is no risk of the camera (1) rotating unnecessarily. In addition, instead of the viewfinder (l4), use the remote controller of the camera (1) on the shoe (l4).
3) may be installed.

Further, in the above embodiment, the case of a video camera has been described, but the same effects as in the above embodiment can be obtained even if the present invention is applied to a camera-integrated video table recorder or even a still camera.

Further, instead of the helical spring (9), a torsion bar, rubber, or the like may be used to elastically connect the rotating shaft (4) and the handle (5).

In addition, in FIGS. 4 and 5, the lead wire (l5)
It is also possible to use the bending loss of the bearing or the friction loss of the bearing to perform the same damping effect as the damping oil. Furthermore, a support such as a shoulder rest may be used instead of the handle (5). [Effects of the Invention] As described above, according to the present invention, the camera is rotatably supported around a substantially vertical axis of rotation, and the support body and the camera are elastically connected, so that the camera can be It is possible to suppress unnecessary rotational movement of the camera due to camera shake when the user supports the camera to take a picture, thereby stably capturing an image.

In addition, the structure is very simple, lightweight and small,
It can be handled very easily as a hand-held camera support device.

[Brief explanation of drawings]

FIG. 1 is an external side view of a camera support device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. 2. , FIG. 4 is a front view showing another embodiment of the present invention, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a configuration diagram of a conventional camera support device. (1)...Camera, (2)...Camera mounting part, (4
)...rotating shaft, (5)...handle (support body),
(6). (7)...Radial bearing, (8)...
... Thrust bearing, (9) ... Helical spring (
elastic body). Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A rotating shaft that has a camera attachment part, a support that rotatably supports this rotating shaft around its axis via a bearing, and an elasticity that elastically connects the rotating shaft and the supporting body. A camera support device comprising a body.