JP3092391U - Head for video camera - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable a wide range of angle adjustment even when shooting through a small opening window. A rotation axis Pv (perpendicular to the paper) is defined near an opening window. A pair of side plates 210 is fixed to both side surfaces of the base unit 200, and the vertical moving unit 220 is interposed therebetween. The side plate 210 is provided with slits 211 and 212 that form concentric arcs with the rotation axis Pv as a center.
The shafts of the gears 221 and 222 attached to the 0 side are fitted. Teeth that mesh with the gears are provided along the slits 211 and 212, and the mandrel is slid along the slits 211 and 212 by rotating the gears 221 and 222. The rotation speed ratio of the gears 221 and 222
And rotationally driven in accordance with the curvature radius ratio of 11, 212,
The camera 120 is swung in the vertical direction. A swing mechanism is also provided in the horizontal direction.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a platform, and particularly to a video camera when shooting from a small opening window. The present invention relates to a camera platform suitable for supporting such as.

[0002]

[Prior art]

  The camera platform is used for many purposes as an essential item for stable shooting. Has been. The important function of the camera platform is to support and fix the camera at the installation location. The point is to adjust the orientation of the camera as needed. For this reason, The usual tripod head is a fixed part that is fixed to the moving part that has a fixture to attach the camera and the installation place. The fixed part is provided, and the moving part is moved with respect to the fixed part to adjust the direction. It has a mechanism for knotting.

[0003]

[Problems to be solved by the device]

  In a general shooting environment, there are no major restrictions on the orientation of the pan head. If the optical axis of the attached camera can be adjusted to any angle, The structure does not matter. However, taken from a small window In special shooting environments such as shadows, the field of view that extends along the optical axis of the camera. Area allows for the widest possible angle adjustment without leaving the aperture window. Is required. For example, if you have a small opening window on the When taking a picture of the outside world secretly from inside the car with a video camera through the mouth window It is preferable to make the size of the opening window as small as possible. However, conventional When using a conventional camera platform, the angle of the video camera installed in the vehicle can be changed significantly. If this happens, the field of view of the video camera will be out of the aperture window, so a sufficient angle adjustment I can't do ketsu.

[0004]   Therefore, the invention is as wide as possible even when shooting through a small opening window. It is an object of the present invention to provide a camera platform with an adjustable range angle.

[0005]

[Means for Solving the Problems]

  (1) The first aspect of the present invention is to provide a camera platform,   A fixed part that is fixed in place,   It has a fixture to attach the camera, centered on a predetermined rotation axis with respect to the fixed part A moving part capable of swinging motion,   The first rotating body attached to either the moving portion or the fixed portion and the other A first rail attached to   Second rotating body attached to either the moving portion or the fixed portion and the other A second rail attached to   Drive means for rotating and driving the first rotating body and the second rotating body at a predetermined speed;   Composed by   Both the first rail and the second rail are in a plane orthogonal to the rotation axis. Along the center of rotation and the intersection of the axis of rotation and its orthogonal plane Form an arc of radius,   The first rotating body slides along the first rail by rotating, and the second rotating body rotates. The body rotates to slide along the second rail,   The driving means has a radius of an arc formed by the first rail and a half of an arc formed by the second rail. The first and second rotating bodies are driven to rotate at a circumferential velocity based on the ratio of the diameter to the rotating body. It has a function to make it.

[0006]   (2) In the second aspect of the present invention, two sets of camera platform according to the above-mentioned first aspect are prepared. Then, attach the fixed part of the other platform to the moving part of one platform, and rotate the rotation axis of one platform. And the rotation axis of the other platform are orthogonal to each other, so that the camera swings horizontally. In addition, it can be rocked vertically.

[0007]

[Embodiment of device]

  Hereinafter, the present invention will be described based on illustrated embodiments. FIG. 1 relates to the present invention It is a figure which shows an example of the utilization type of the camera platform. Here, vehicles such as trucks The body 110 of the luggage carrier of 100 is provided with small opening windows 111 and 112, and A usage pattern for video shooting is shown through the mouth windows 111 and 112. Illustration In this example, the body 110 is not decorated at all, but in reality, the opening is In order to camouflage the windows 111 and 112, attach a film or draw a picture. Will be punished. Inside the body 110 of the luggage carrier, there is a beer for shooting. Deo camera is prepared. Each video camera has an opening window 111, 112, respectively. It will be installed at a position suitable for shooting through.

[0008]   FIG. 2 shows that the video camera 12 is installed inside the opening window 111 provided in the body 110. It is a top view (body 110 shows a section) showing the state where 0 was installed. Open window Glass is set in 111. The dash-dotted line passing through the opening window 111 is a video It is the optical axis L of the camera 120. The video camera 120 is installed inside the body 110. Will be supported by the pan head.

[0009]   FIG. 3 shows the video camera 120 with a rotation axis P (extending in a direction perpendicular to the paper surface). It is a top view which shows the state rotated as a center. As compared with the state shown in FIG. In the state shown in, the entire video camera 120 is rotated counterclockwise by 15 °. Therefore, the optical axis L is also inclined by 15 °. In this way, the video camera 1 When rotated about a rotation axis P that passes through substantially the center of 20, Then, the lens position of the video camera 120 is displaced, so that the radial direction is obtained along the optical axis L. A part of the widening visual field is out of the opening window 111, and the visual field becomes narrow. U In other words, in the example shown in FIG. 3, the video camera 120 is rotated by 15 °. In order to take a picture, the opening window 111 has to be enlarged a little. .

[0010]   As shown in FIG. 3, the conventional camera platform is almost in the middle of the video camera 120. The angle of the video camera 120 can be adjusted by rotating about the rotation axis P in the center position. In order to make the angle adjustment range wide, the opening window 111 is used. There is no choice but to design a large one. However, camouflage from the outside world Considering the effect of aperture, it is preferable that the opening window 111 is as small as possible.

[0011]   The present invention is intended to solve such a problem, and its basic concept is to As shown in the plan view of FIG. 4, the rotation axis P of the video camera 120 is set near the opening window 111. The point is to bring it with you. FIG. 4 shows the vicinity of the opening window 111. Centering on the rotation axis P (extending in the direction perpendicular to the paper surface) defined in It shows a state in which 120 is rotated counterclockwise by 15 °. 3 and 4 Are rotated by 15 ° with respect to the state shown in FIG. FIG. 3 is a plan view showing a state in which the former is installed near the center of the video camera 120. Since the rotation is performed around the rotation axis P, a part of the field of view may be the opening window 111. The latter is separated from the video camera 120, while the latter is located in front of the video camera 120. Since rotation is performed around the rotation axis P provided near the mouth window 111, The area is within the range of the opening window 111.

[0012]   In this way, by changing the position of the rotation axis P of the video camera 120, Even with the large opening window 111, it is possible to adjust the angle in a sufficient range. However As shown in FIG. 4, the rotation axis P is set to the front position of the video camera 120. In order to rotate the head, it is necessary to devise a mechanism for rotating the platform. Book of the invention The quality lies in the devise of the rotating mechanism of such a platform.

[0013]   FIG. 5 is a plan view showing the basic structure of a camera platform according to the present invention. This pan head The basic constituent elements of are a fixed part 10 and a moving part 20. The fixing portion 10 is an example shown in the figure. Is composed of a rectangular plate, and is located at a predetermined location (for example, the usage pattern as shown in FIG. 1). In this case, it is fixed inside the body 110). Fixed part 10 As shown in the figure, the upper surface of the first rail 11 and the second rail 11 are formed in an arc shape. 12 are arranged. On the other hand, the moving unit 20 has a predetermined rotation axis with respect to the fixed unit 10. P is a component capable of swinging motion about P (extending in the direction perpendicular to the paper surface), A first rotating body 21 and a second rotating body 22 are arranged on the lower surface thereof, In addition, it has a fixture 23 for attaching the camera. In the illustrated example, the fixture 23 , Which consists of a simple screwing hole, mounts the video camera on the moving part 20 by screwing. Can be attached. Of course, as a mounting tool, you can attach a camera Any structure may be used as long as it can be formed.

[0014]   The first rail 11 and the second rail 12 arranged on the fixed portion 10 are These also extend along a plane orthogonal to the rotation axis P, that is, along the upper surface of the fixed portion 10. , And each has a predetermined radius with the center point at the intersection of the rotation axis P and the upper surface of the fixed portion 10. It has an arc shape. Here, for convenience, the half of the inner arc formed by the first rail 11 is The diameter is referred to as R1 and the radius of the inner arc formed by the second rail 12 is referred to as R2.

[0015]   On the other hand, the first rotating body 21 rotates about the central axis Q1 to move the first rotating body 21 to the first rotating body. Slides along the rail 11 of the second rotary body 22 and rotates about the central axis Q2. By doing so, it is configured to slide along the second rail 12. In fact Although not shown in the figure, the first rotating body 21 does not come off from the first rail 11. And a second rotating body 22 for the second rail 12 It is necessary to provide some kind of guide structure so as not to come off. other words Then, in FIG. 5, the circumference of the first rotating body 21 is always within the first rail 11. Keeping contact with the peripheral portion, the circumference of the second rotating body 22 is always the second rail 1 2 will be kept in contact with the inner peripheral portion. As the rotating bodies 21 and 22, When using gears, provide teeth on the rails 11 and 12 that mesh with them. To do so.

[0016]   In addition to this, the first rotating body 21 and the second rotating body 22 are driven to rotate at a predetermined speed. A driving means is provided. This drive means is, for example, a stepping motor and a gear. It may be realized by electric components such as a mechanism, a manual handle and a gear mechanism. It may be realized by a manual component such as. The important point is that this drive means Radius R1 of arc formed by the first rail 11 and radius R2 of arc formed by the second rail 11. The first rotating body 21 and the second rotating body 22 are rotated at a circumferential speed based on the ratio of The point is that it has a function of rolling drive. For example, the circumferential speed of the first rotating body 21 When the degree is V1 and the circumferential speed of the second rotating body 22 is V2, V1: V2 = R1: R The driving is performed so as to become 2.

[0017]   The first rotating body 21 and the second rotating body 22 are rotationally driven at such a speed ratio. If so, the line connecting the points Q1 and Q2 in the figure always passes through the rotation axis P. . The moving unit 20A indicated by a broken line in the figure has the above-described predetermined rotating bodies 21 and 22. The position after the movement of the moving unit 20 when driven to rotate clockwise at a speed is shown. . When the optical axis L of the video camera mounted on the moving unit 20 passes through the rotation axis P, If so, the optical axis LA of the video camera mounted on the moving unit 20A also rotates. The state passes through the axis P. Here, the angle θ between the optical axis L and the optical axis LA is determined by the moving unit 2 This corresponds to a rotation angle about the rotation axis P of 0. The circumferential velocity V1 of the first rotating body 21 and the The relationship of V1: V2 = R1: R2 is satisfied with the circumferential velocity V2 of the second rotating body 22. The optical axis LA always passes through the rotation axis P as long as the rotation drive is performed. , The video camera mounted on the moving unit 20 is swung about the rotation axis P. It is possible to make it. Therefore, the opening window 111 should be close to the rotation axis P. In addition, by adjusting the arrangement position of the fixing portion 10, even if the opening window 111 is relatively small, It becomes possible to secure a wide range of degree adjustment.

[0018]   To maintain the circumferential speeds of the two rotating bodies 21, 22 at a predetermined ratio, for example, Designed so that the radius ratio of the bodies 21 and 22 (the number of teeth in the case of gears) is R1: R2. , Both may be rotationally driven at the same angular velocity. Alternatively, the rotating body 2 Steps 1 and 22 should have the same radius, and the angular velocities of both should be R1: R2. You may make it rotate-drive, controlling with a ping motor etc.

[0019]   The platform shown in FIG. 5 has only the function of horizontally swinging the video camera. However, in practice, it is preferable to have a function of swinging in the vertical direction. This In order to realize a mechanism that can swing in both the horizontal and vertical directions, Prepare two sets of pan heads as shown in Fig. 5, and install the fixed part of the other pan head on the moving part of one pan head. The rotation axis of one platform and the rotation axis of the other platform are orthogonal to each other. Just do it.

[0020]   FIG. 6 is a side view showing a more specific embodiment of a camera platform according to the present invention, and FIG. [Fig. 4] is a bottom view of a part thereof. As shown in FIG. 6, in this platform, the base portion 2 00 has a pair of side plates 210 attached to both sides (in the figure, the front side plate 2 (Only 10 is shown), and the vertical moving part 220 is sandwiched between them. There is. On the upper surface of the vertical moving unit 220, as will be described later, the horizontal moving unit 230 (see FIG. (Not shown in the figure) is mounted on the video camera 120. It is attached. The dashed line in the figure indicates the optical axis of the video camera 120.

[0021]   Gears 221 and 222 are attached to both sides of the vertical moving unit 220. It The side plate 210 is formed with arc-shaped slits 211 and 212. The mandrels of the gears 221 and 222 are fitted in the slits 211 and 212. Illustration Although not formed, the back side of the side plate 210 has an arc along the slits 211 and 212. The teeth are formed like a circle and mesh with the teeth of the gears 221 and 222. Vertical movement A stepping motor is incorporated inside the portion 220, and the gears 221 and 221 are provided. Each of 22 is rotationally driven at a predetermined circumferential speed.

[0022]   The slits 221 and 212 have a vertical rotation axis Pv (extended in a direction perpendicular to the paper surface. The center of the side plate 210 along the slit. At the circumferential speed according to the radius ratio of the arc-shaped envelope of the tooth (not shown) provided on the back side of the When the gears 221 and 222 are driven to rotate, the vertical movement unit 220 moves the rotation axis Pv to the center. Since the swinging motion is performed with the mind in mind, it becomes possible to adjust the angle in the vertical direction.

[0023]   On the other hand, FIG. 7 shows a horizontal moving unit 230 and a video camera mounted on the upper surface thereof. It is a bottom view of LA 120. The horizontal moving unit 230 is a rectangular plate-shaped member, and is a vertical moving member. It is swingably attached to the upper surface of the moving part 220. As shown in FIG. Gears 231 and 232 are attached to the lower surface of the horizontal moving unit 230. On the other hand, the upper surface of the vertical moving unit 220 (not shown in FIG. 7) has an arc shape. Slits 241 and 242 are formed (in FIG. 7, only those positions are indicated by broken lines). (Shown), the mandrels of the gears 231 and 232 are fitted in the slits 241 and 242. ing. Further, on the upper surface of the vertical moving unit 220, along the slits 241 and 242. The teeth are formed in an arc shape and mesh with the teeth of the gears 231 and 232. Horizontal A stepping motor is incorporated inside the moving unit 230, and the gear 231 , 232 are each driven to rotate at a predetermined circumferential speed.

[0024]   The slits 241 and 242 have horizontal rotation axes Ph (extending in a direction perpendicular to the paper surface). The center of the gears 231 and 2 is a circular arc of a concentric circle. When 32 is driven to rotate, the horizontal movement unit 230 causes the swinging movement around the rotation axis Ph. This makes it possible to adjust the angle with respect to the horizontal direction.

[0025]   After all, in the embodiment shown in FIGS. 6 and 7, the base portion 200 and the side plate 210. Functions as a fixed part of the first platform, and the vertical drive unit 220 moves the first platform. Functioning as a part, the slits 211 and 212 and an arc shape arranged along the slits The teeth of the wheel function as rails of the first platform, and the gears 221 and 222 are the first platform. It functions as a rotating body of, and this first pan head enables vertical angle adjustment. Will be done. Similarly, the vertical drive unit 220 serves as a fixed unit for the second platform. The slits 241, 242 and the arcuate teeth arranged along them function, The gears 231 and 232 function as the rails of the second platform, and the gears 231 and 232 are the rotating bodies of the second platform. This second pan head adjusts the angle in the horizontal direction. It will be.

[0026]   The example in which the present invention is used as a platform for a video camera has been described above. The platform is not limited to a video camera, but a platform for various cameras. And available. In addition, in the above-described embodiment, the rail is provided on the fixed portion side and the moving portion side is provided. Although the rotating body was installed on the opposite side, on the contrary, it is recommended to install the rotating body on the fixed part side and the rail on the moving part side. It does not matter even if it has a different structure. Furthermore, the first rail and the second rail are not always It is not necessary to arrange them on the same plane.

[0027]

[Effect of device]

  As described above, according to the camera platform according to the present invention, an image can be taken through a small opening window. Even when performing shadows, it is possible to adjust the angle in the widest possible range.

[Brief description of drawings]

FIG. 1 is a view showing an example of a form of use of a camera platform according to the present invention, which is a side view showing a state where an image is taken from inside a vehicle through a small opening window.

2 is a plan view (body 110 shows a cross section) showing a state in which a video camera 120 is installed inside an opening window 111 provided in body 110 shown in FIG. 1. FIG.

FIG. 3 is a plan view showing a state in which the video camera 120 shown in FIG. 2 is rotated about a rotation axis P (extending in a direction perpendicular to the paper surface) near the center.

FIG. 4 shows the video camera 120 shown in FIG.
FIG. 3 is a plan view showing a state of being rotated around a rotation axis P (extending in a direction perpendicular to the paper surface) in the vicinity of 1 as a center.

FIG. 5 is a plan view showing a basic configuration of a camera platform according to the present invention.

FIG. 6 is a side view showing a more specific embodiment of the camera platform according to the present invention.

FIG. 7 is a bottom view showing a part of a more specific embodiment of the camera platform according to the present invention.

[Explanation of symbols]

10 ... Fixed part 11 ... the first rail 12 ... second rail 20, 20A ... Moving part 21 ... First rotating body 22 ... Second rotating body 23 ... Fixture 100 ... Vehicle 110 ... Body 111, 112 ... Opening window 120 ... Video camera 200 ... Base part 210 ... Side plate 211, 212 ... slits 220 ... Vertical moving part 221, 222 ... Gears 230 ... Horizontal moving part 231, 232 ... Gears 241,242 ... slits L, La ... Optical axis of video camera P, Pv, Ph ... Rotating shaft Q1, Q2 ... central axis R1, R2 ... Radius

Claims (2)

[Scope of utility model registration request] 1. A moving part having a fixed part fixed at a predetermined position and a fixture for mounting a camera, and capable of swinging motion around the predetermined rotation axis with respect to the fixed part; Rotating body attached to either one of the movable portion or the fixed portion and a first rail attached to the other, and a second rotating body attached to either the moving portion or the fixed portion. And a second rail attached to the other, and drive means for rotationally driving the first rotating body and the second rotating body at a predetermined speed, the first rail and the second rail Are all extending along a plane orthogonal to the rotation axis, and
Each of the first rotating bodies has an arc shape having a predetermined radius with the intersection of the rotation axis and the plane as a center point, and the first rotating body rotates to slide along the first rail, The rotating body slides along the second rail as it rotates, and the driving means ratios the radius of the arc formed by the first rail and the radius of the arc formed by the second rail. A pan head for a camera, wherein the first rotating body and the second rotating body are rotationally driven at a circumferential speed based on the above. 2. Two sets of camera platform according to claim 1 are prepared, a fixed part of the other platform is attached to a moving part of one platform, and a rotary shaft of one platform and the other cloud. The camera platform is characterized in that by making the rotation axis of the base orthogonal to each other, the camera can be rocked in the horizontal direction as well as in the vertical direction.