JP2530941Y2 - Camera mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a camera mounting device suitable for application to, for example, a monitoring device, a security system, and the like.

[Outline of the invention]

The present invention includes a frame member, a ring-shaped member, a rotation unit, and a camera support member. When the camera support member is rotated with respect to the ring-shaped member, the lens of the camera is positioned at one of the rotation positions. At least a part of the side opposite to the side where is provided enters the hollow part, so that the structure is simple, low power consumption, price is low, the occupied space is small, 360 ° in the horizontal plane and in the vertical plane respectively. According to the present invention, it is possible to obtain a camera mounting device capable of capturing an image over a range of approximately 180 °.

[Conventional technology]

Conventionally, a camera mounting device as shown in FIG. 7 has been used for monitoring, security and the like.

Hereinafter, a conventional camera mounting device will be described with reference to FIG.

In FIG. 7B, (25) is a fixing member, and this fixing member (25) is attached to the ceiling. (26) is a shaft. One end of the shaft (26) is attached to the fixing member (25), and the other end is rotatably attached to the block (27) in a horizontal plane as indicated by an arrow P. The block (27) is connected to the camera body (11) of the camera CM consisting of the camera body (11) and the zoom lens (12) by a mounting member (28) and a shaft (29). Also, the camera CM is rotated about the axis (29) in a vertical plane as shown by the arrow T. The illustration and description of the drive system and the like are omitted.

FIG. 7A shows a radome (24) which is attached so as to cover the device described in FIG. 7B for protection or the like. The radome (24) is made of a colorless and transparent hard plastic or the like, and the shape of the radome (24) has a spherical shape lacking a broken line as shown in the figure.

Here, the arrow P of the camera mounting device shown in FIG.
Assuming that the turning radius of rotation in the direction of rotation and the turning radius of rotation in the direction of arrow T are a, respectively, as shown in FIG. 7A, the radome (2
4) is a radius including a margin α from the center O of the sphere, ie, a sphere including a broken line portion, that is,
A radome (24) having a radius of a + α indicated by a dashed line arrow in the figure is obtained.

[Problems to be solved by the invention]

Incidentally, the center of the camera CM of the camera mounting device described with reference to FIG. 7 in the length direction, the width direction, and the depth direction includes the radome (24) shown in FIG. The size of the radome (24) is large because it does not coincide with the center O of the sphere. Therefore, when the camera mounting device is mounted on the ceiling, it becomes noticeable. Further, as shown in FIG. 7B, since the members for rotating the camera CM in the P direction and the T direction are large and complicated, imaging in the P and T directions can be performed at 360 ° and approximately 180 °, respectively. Not only, but its price will be expensive. Similarly, since the size of the camera mounting device is large, the weight of the camera mounting device is heavy, and therefore, the motor that drives the camera mounting device has a large power consumption. Therefore, the power consumption of the camera mounting device is large.

In view of this point, the present invention has a simple structure, low power consumption,
An object of the present invention is to propose a camera mounting device that is inexpensive and has a small occupied space, and is capable of capturing images over a range of 360 ° and approximately 180 ° in a horizontal plane and a vertical plane, respectively.

[Means for solving the problem]

In the camera mounting device according to the present invention, the sphere has its center O
(1) constituting the hollow portion F formed when cut along a plane perpendicular to the first straight line L1 that passes through, and the inner peripheral surface cuts the sphere along a plane perpendicular to the first straight line L1 A ring-shaped member (2) constituting a circumferential portion serving as a cutting surface when the ring-shaped member (2) is placed on the frame member (1) in the first direction.
Rotating means for rotating about the straight line L1 as an axis, and a first straight line
A camera support member (13) rotatably mounted on the ring-shaped member (2) about an axis perpendicular to L1 and capable of supporting the camera CM; When the camera support member (13) is rotated, at least one part of the camera CM on the side opposite to the lens-provided side enters the hollow portion F at any one of the rotation positions. Is what it is.

[Action]

According to the camera mounting device of the present invention, the camera CM
Is rotated about the first straight line L1 by the rotating means, and the first straight line is rotated by the ring-shaped member (2).
When the camera support member (13) is rotated with respect to the ring-shaped member (2), the lens of the camera CM is provided at one of the rotation positions. At least a part of the side opposite to the set side enters the hollow portion F.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 1. Before describing the embodiment, the principle of the embodiment of the present invention will be described with reference to FIG.

FIG. 2B shows a camera CM including a camera body (11) and a zoom lens (12) attached to the camera body (11). That is, the length direction of this camera CM,
The point where the centers in the width direction and the depth direction intersect is assumed to be O, and the center O is located on the optical axis x of the zoom lens (12) of the camera CM. This center O is matched with the center O when the radome (24) shown in FIG. 2A is formed into a sphere including the part shown by the dotted line, and respectively in the directions of arrows P and T shown in FIG. 2B. When moving, assuming that each of the turning radii is b and the margin is α, the radius of the radome (24) becomes b + α as shown by the dashed line arrow in the figure, which is considerably smaller than the radome (24) described with reference to FIG. Become. 360 °
, The occupied radius, that is, the occupied space can be minimized, and the change in the imaging condition due to the rotation of the camera CM can be minimized.

Next, an embodiment of the present invention will be described with reference to FIG.
(1) is a frame having a U-shaped cross section, and this frame (1) is attached to, for example, a ceiling. (2) is a ring gear for rotating the camera CM in a horizontal plane.
This ring gear (2) has a shaft (4) at its inner edge.
And is rotatably mounted on a guide (3) rotatably mounted on the frame (1) via. Three or more, for example, four or five such guides (3) are provided. Further, teeth (2a) are formed on the outer edge of the ring gear (2).

The frame (1) moves the sphere through the center O of the first
Hollow section F formed when cut along a plane perpendicular to the straight line L1
Is a frame member. In addition, the ring gear (2) forms a ring-shaped member that forms a circumferential portion that becomes a cut surface when the sphere is cut along a plane whose inner circumferential surface is perpendicular to the first straight line L1.

(8) is a reduction gear, and this reduction gear (8) is meshed with the ring gear (2). (7) is a reduction gear, a motor for driving a ring gear (for example, a stepping motor)
The worm gear (see FIG. 3) (22), not shown in FIG. 1, is engaged with (10). or,
The reduction gears (7) and (8) are connected by a shaft (9). Accordingly, the power of the ring gear driving motor (10) is transmitted to the reduction gear (7) via the worm gear (22) and also transmitted to the reduction gear (8) to rotate the ring gear (2). .

CM is a camera (CCD camera), (11) is the camera body, and a zoom lens (12) is attached to the camera body (11). (13) is a camera frame as a camera support member. This camera frame (13) is a camera CM.
Hold. The camera frame (13) is rotatably attached to the frame fixing member (14) by a shaft (15). The frame fixing member (14) is connected to the ring gear (2) via the frame fixing members (16) and (17).
Attached to. Although not shown in the figure, a portion of the camera frame (13) opposite to the portion attached to the ring gear (2) is also attached to the ring gear (2).

Next, the rotating means RM for rotating the camera CM in a vertical plane will be described. (18) is a gear, which is attached to the side of the camera body (11). A worm gear (19) is meshed with the gear (18), and is attached to a shaft of a fixed motor (stepping motor or the like) (20) by a motor attachment member (21) attached to the frame (1). Accordingly, the power of the motor (20) is transmitted to the gear (18) via the worm gear (19), and the gear (18) rotates in a vertical plane, and the camera CM fixed to this rotates the camera frame (13). And rotate in the vertical plane.

(24) is a flat cable lead-out hole formed in the frame (1). The flat cable (23) is passed through the hole (24), for example, for a camera mounting device installed in another place. Connected to a controller, monitor receiver, etc.

Next, with reference to FIG. 3, a description will be given of a turning means for turning the camera CM into a horizontal plane. The same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will not be repeated.

FIG. 3A is a plan view of a rotating means for rotating the camera CM in a horizontal plane, and FIG. 3B is a front view thereof. This rotating means is constituted by the ring gear driving motor (10), reduction gears (7) and (8), and a worm gear (22).

That is, the driving power of the ring gear driving motor (10) is transmitted to the reduction gear (7) through the worm gear (22) and also transmitted to the reduction gear (8), so that the reduction gear (8) rotates and The ring gear (2) meshed with the ring gear rotates, and the camera CM fixed to the ring gear (2) rotates in the direction of arrow P in a horizontal plane shown in the figure.

Next, referring to FIG. 4, the driving means in the vertical plane of the above-mentioned camera mounting device will be described. The same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will not be repeated.

FIG. 4A is a side view of the driving means, and FIG. 4B is a plan view thereof.

That is, the gear (18) fixed to the side of the camera CM
And the worm gear (19) are meshed with each other, so that the driving power of the motor (20) is transmitted to the gear (18) through the worm gear (19), and the gear (18) rotates and is attached to the gear (18). The camera CM is rotated in the direction of arrow T in the vertical plane.

Next, the relationship between the rotation of the camera CM and the radome (24) will be described with reference to FIG.

In FIG. 5, FIG. 5A is a side view of the camera CM and the radome (24), and FIG. 5B is a front view of the camera CM and the radome (24) (the camera is facing upward). is there.

In each of FIGS. 5A and 5B, a partially missing circle of a solid line indicates a spherical radome (24) partially missing, and a broken line indicates the missing portion. In this case, the camera T and P
The rotation center O in the direction coincides with the center O of the sphere.
In addition, in each of FIGS. 5A and 5B, the trajectory (circle) of the camera CM in the vertical plane is a circle smaller than the radius of this circle (sphere) by the margin α. . The margin α takes into account an error caused by a deviation between the rotation center O in the horizontal and vertical planes of the camera and the center O of the circle (sphere).

Further, as shown in FIG. 5C, if the inner diameter of the ring gear (2) is twice the radius of the above-mentioned circle (sphere), that is, slightly larger than 2r, the camera CM rotates in the T direction and is positioned directly below. When the camera CM is to be imaged, the hollow portion F into which the rear of the camera CM enters
Can be secured as necessary.

Further, the ring gear (2) may be formed in a shape as shown in FIGS. 6A and 6B, that is, in a cylindrical shape, and the ring gear (2) may be attached so as to cover the hollow portion. In this case, as shown in the bottom view of FIG. 6B, a tooth (2a) is formed at the lower part of the ring gear (2), a worm gear (19) is meshed with the tooth (2a), and a ring gear driving motor ( Rotate according to 10).

As is clear from the above, the camera CM is positioned on the optical axis x of the camera CM in a horizontal and vertical plane around the center O in the length direction, the center in the width direction, and the center O in the depth direction. , The radius of rotation of the camera CM is reduced, and the change in imaging conditions due to the rotation of the camera CM can be minimized. Further, by rotating the camera CM around an axis passing through the center of gravity of the camera CM, the torque required to rotate the camera CM around the axis can be reduced. Further, since the ring gear (2) for driving the camera CM in the horizontal plane is provided, when the camera CM is driven in the vertical plane by the driving means for driving the camera CM in the vertical plane, the rear portion of the camera CM is driven. Enters the hollow portion F formed by the ring gear (2). For these reasons, the radome (24) attached so as to cover the camera CM and the rotating means can be made smaller. Therefore,
Since the size of the camera mounting device can be made inconspicuous, the effect for monitoring can be enhanced.

[0031] Further, since the structure of the mounting device of the camera is simplified, highly reliable imaging can be performed. Further, since the weight is reduced by simplifying the structure, the camera can be placed in a horizontal and vertical plane. The motors used for the driving means for rotating each can be miniaturized. Also, the simplicity of the structure and the resulting miniaturization of the motor make it possible to reduce the price of this camera mounting device.

[Effect of the invention]

According to the present invention described above, a frame member, a ring-shaped member, a rotation unit, and a camera support member are provided, and when the camera support member is rotated with respect to the ring-shaped member, in any of the rotation positions. Since at least a part of the side opposite to the side on which the camera lens is provided enters the hollow portion, the structure is simple, low power consumption, low cost, occupied space is small, and the horizontal plane and the vertical plane respectively. It is possible to obtain a camera mounting device capable of imaging in a range of 360 ° and approximately 180 °.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the principle of the embodiment, FIG. 3 is a diagram showing one rotating means of the embodiment, and FIG. FIG. 5 is a view showing another driving means of the example, FIG. 5 is a view showing the relationship between the rotation of the camera and the radome of the embodiment, FIG. 6 is a view showing a modification of the ring gear of the embodiment, and FIG. It is a figure showing a conventional example. (1) is a frame, (2) is a ring gear, F is its hollow part, (2a) is a tooth, (3) is a guide, (4), (9) and (15) are axes, (7) and ( 8) is a reduction gear, (10) is a ring gear driving motor, CM is a camera, (11) is a camera body, (12) is a zoom lens, (13) is a camera frame, (14), (16) and ( 17) is a frame fixing member,
(18) is a gear, O is the center, and x is the optical axis of the camera.

Claims (1)

(57) [Scope of request for utility model registration] 1. A frame member forming a hollow portion formed when a sphere is cut along a plane perpendicular to a first straight line passing through the center thereof, and an inner peripheral surface is a surface perpendicular to the first straight line. A ring-shaped member that forms a circumferential portion that becomes a cut surface when the sphere is cut, and a rotating unit that rotates the ring-shaped member with respect to the frame member around the first straight line as an axis. And a camera support member rotatably mounted on the ring-shaped member about an axis perpendicular to the first straight line, and capable of supporting a camera. When the camera support member is rotated, at least one of the side opposite to the side on which the lens of the camera is provided enters the hollow portion at any one of the rotation positions. Camera mounting device.