JP2012118145A - Imaging apparatus support mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus support mechanism capable of improving the accuracy in rotation operations in a pan direction and a tilt direction and reducing the load applied to an output shaft.SOLUTION: An output shaft 41 of a first motor 4 is fixed to a first bevel gear 11 while an output shaft 51 of a second motor 5 is fixed to a second bevel gear 12. The output shafts 41 and 51 are rotatably connected to be coaxially and mutually independent by a connection shaft 7. The connection shaft 7 is orthogonally connected to a rotary shaft 8. The rotary shaft 8 is rotatably provided with a third bevel gear 13 to be engaged with the first bevel gear 11 and the second bevel gear 12. The output shaft 41 and the output shaft 51 are connected by the connection shaft 7, thereby improving the accuracy in the rotation operations in the pan direction and the tilt direction of a camera 17 and reducing the load applied to the output shafts 41 and 51.

Description

  The present invention relates to an imaging apparatus support mechanism that rotates an imaging direction of an imaging apparatus in a pan direction and a tilt direction.

  2. Description of the Related Art Conventionally, a cradle with a pan / tilt function including a drive source that rotates an imaging apparatus such as a digital camera in a pan direction and a tilt direction is known (for example, see Patent Document 1). In this cradle with a pan head function, a bevel gear attached to each output shaft of a pair of drive motors arranged to face each other is meshed with a bevel gear attached to a rotation shaft of a support base orthogonal to the output shaft. Yes. The rotation axis of the support pedestal is the rotation center in the pan direction, and the output shafts of the drive motors arranged coaxially are the rotation centers in the tilt direction.

JP 2008-76639 A

  However, in the cradle with a pan head function described in Patent Document 1, the output shafts of a pair of drive motors arranged to face each other are not connected. Therefore, there is a possibility that the positional relationship between the output shafts may be deviated, and there is a problem that the accuracy of the rotation operation of the imaging device in the pan direction and the tilt direction is lowered. Further, since there is nothing to support each output shaft, there is a problem that a large load is applied to each output shaft. Further, for example, when the imaging apparatus is rotated 90 ° in the pan direction and then rotated 90 ° in the tilt direction, the orientation of the imaging apparatus is also rotated 90 °, so adjustment of the shooting direction is troublesome. There was also a problem.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an imaging device support mechanism that can improve the accuracy of rotational operations in the pan direction and the tilt direction and can reduce the load on the output shaft. And

  An image pickup apparatus support mechanism according to a first aspect of the present invention is an image pickup apparatus support mechanism that rotates a shooting direction of an image pickup apparatus in a pan direction and a tilt direction, and is opposed to a first drive unit and the first drive unit. A second driving means disposed at a position where the first driving means is provided, a first bevel gear provided on a first output shaft of the first driving means and transmitting a rotational driving force of the first driving means; and the first output shaft; A second bevel gear which is provided on a second output shaft of the second drive means disposed on the same axis and transmits the rotational driving force of the second drive means; the first output shaft and the second output shaft; A connecting shaft that is coaxially disposed and rotatably connects the first output shaft and the second output shaft independently of each other; a rotating shaft that is connected perpendicularly to the connecting shaft; and One end is rotatably provided and meshes with the first bevel gear and the second bevel gear. A third bevel gear which, said third bevel gear, or provided on the rotary shaft, and a support means for supporting the imaging device.

  In the imaging device support mechanism according to the first aspect, the first output shaft and the second output shaft are connected coaxially and independently of each other by the connecting shaft so as to be independently rotatable. Therefore, since the positional relationship between the first output shaft and the second output shaft is not shifted, the accuracy of the rotation operation of the imaging device in the pan direction and the tilt direction can be improved. Furthermore, since the 1st output shaft and the 2nd output shaft are connected with the connection shaft, the load concerning each shaft can be reduced.

  Further, in the first aspect, one end and the other end of the connecting shaft are connected to a shaft hole provided in the center of the first bevel gear and a shaft hole provided in the center of the second bevel gear. Each may be inserted rotatably. Thereby, a connection axis | shaft arrange | positions a 1st output shaft and a 2nd output shaft on the same axis | shaft, and can be connected so that it can rotate independently of each other.

  In the first aspect, one of the one end and the other end of the connecting shaft is fixed to the first bevel gear or the second bevel gear, and the other is the second bevel gear or The first bevel gear may be rotatably inserted into a shaft hole provided at the center. As a result, the connecting shaft rotates integrally with either the first bevel gear or the second bevel gear, so that there is no deviation between the connecting shaft and either the first bevel gear or the second bevel gear. Can do. Therefore, the rotation accuracy of the imaging device can be further improved. Moreover, the number of parts can be reduced by providing them integrally.

  In the first aspect, the connecting shaft may be fixed or integrated with either the first output shaft or the second output shaft. As a result, the connecting shaft and the first output shaft or the second output shaft rotate together, so that the displacement between the connecting shaft and the first output shaft or the second output shaft can be eliminated. it can. Moreover, the number of parts can be reduced by providing them integrally.

  In the first aspect, the diameter of the rotating shaft is larger than the diameters of the first output shaft and the second output shaft, and the connecting shaft penetrates the rotating shaft and is rotatably connected. May be. By improving the strength of the rotating shaft, the connecting shaft can penetrate the rotating shaft. Therefore, the imaging apparatus can be rotated stably.

  In the first aspect, the diameter of the connecting shaft is larger than the diameters of the first output shaft and the second output shaft, and the rotating shaft passes through the connecting shaft so as to be rotatable. May be. By improving the strength of the connecting shaft, the rotating shaft can penetrate the connecting shaft. Therefore, the imaging apparatus can be rotated stably.

  Moreover, the 1st aspect WHEREIN: The said support means may be provided in the said other end part of the said rotating shaft. Thereby, compared with the case where the support means is provided in the third bevel gear, the rotation trajectory of the imaging apparatus with the connecting shaft as the rotation center can be further set on the inner side. Therefore, the imaging device support mechanism that supports the imaging device can be made more compact.

FIG. 3 is a perspective view of the camera support mechanism 1 as viewed from diagonally left front. It is the perspective view seen from the diagonally right front of the camera support mechanism. 3 is a plan view of the camera support mechanism 1. FIG. 3 is a front view of the camera support mechanism 1. FIG. FIG. 4 is a cross-sectional view taken along the line I-I in FIG. 3. FIG. 4 is a cross-sectional view taken along the line II-II shown in FIG. 3. FIG. 5 is a cross-sectional view taken along line III-III shown in FIG. 4. It is a figure showing rotation operation of the tilt direction of the camera. It is the figure which showed the rotation operation | movement of the pan direction of the camera. It is the figure which showed the simultaneous rotation operation | movement of the tilt and pan direction of the camera. It is the perspective view seen from the right diagonal front of the camera support mechanism 100 which is a 1st modification. It is a longitudinal cross-sectional view of the camera support mechanism 150 which is a 2nd modification. It is a transverse cross section of camera support mechanism 150 which is the 2nd modification. It is a longitudinal cross-sectional view of the camera support mechanism 200 which is a 3rd modification.

  Hereinafter, a camera support mechanism 1 which is an embodiment of the imaging device support mechanism of the present invention will be described with reference to the drawings. The drawings to be referred to are used for explaining technical features that can be adopted by the present invention. The configuration of the device described in the drawings is not intended to be limited to that, but merely an illustrative example.

  In the following description, the diagonally lower right, diagonally upper left, diagonally upper right, and diagonally lower left in FIG. 1 are the front, rear, right, and left sides of the camera support mechanism 1. The left diagonally downward, diagonally upward right, diagonally downward right and diagonally upward left in FIG. 2 are the front, rear, right and left sides of the camera support mechanism 1. The lower, upper, right and left sides in FIG. 3 are the front, rear, right and left sides of the camera support mechanism 1. The front side, the depth direction, right side, and left side in FIG. 4 are defined as the front, back, right, and left sides of the camera support mechanism 1.

  The camera support mechanism 1 shown in FIGS. 1 and 2 fixes the camera 17 in a detachable manner, while the pan direction (the direction of the arrow P shown by the solid line in FIG. 1) and the tilt direction (the arrow T shown by the dotted line in FIG. 1). Direction) can be changed freely. In the present embodiment, the pan direction means the horizontal direction, and the tilt direction means the vertical direction.

  First, the overall structure of the camera support mechanism 1 will be described. As shown in FIGS. 1 and 2, the camera support mechanism 1 includes a base frame 2 formed in an inverted T shape in a side view, and a U-shaped groove-shaped fixing member 3 fixed to the upper portion of the base frame 2. The first motor 4 and the second motor 5 that are respectively fixed to the fixing member 3 and are coaxially opposed to each other in the vertical direction, and projecting upward from the first motor 4 positioned below the camera support mechanism 1. The first bevel gear 11 fixed to the distal end portion of the output shaft 41 to be fixed and the distal end portion protruding downward from the output shaft 51 (see FIG. 4) of the second motor 5 positioned above the camera support mechanism 1 are fixed. The second bevel gear 12, the output shaft 41 and the output shaft 51 are connected to each other so as to be independently rotatable, and the rotary shaft is connected to the connection shaft 7 at right angles and extends substantially horizontally. 8 and a first bevel gear 1 that is rotatably provided at one end of the rotary shaft 8 in the longitudinal direction. And a third bevel gear 13 which respectively mesh with the second bevel gear 12. A camera pedestal portion 88 (see FIG. 7) that is formed in a concave shape on the rear end side surface of the third bevel gear 13 and detachably fixes the camera 17 (corresponding to the “imaging device” of the present invention). Is provided.

  Next, each component of the camera support mechanism 1 will be described in detail. First, the base frame 2 will be described. As shown in FIGS. 1 to 3, the base frame 2 includes a plate-like horizontal portion 21 that is horizontally extended for installation on a desk, and a substantially central portion of the horizontal portion 21 that is cut out in a rectangular shape. And a plate-like support portion 22 that is folded vertically upward and extends upward, and the shape as viewed from the side is an inverted T-shape. As shown in FIG. 7, a pair of fixing holes 29 and 29 for fixing the fixing member 3 are provided side by side in the upper part of the front surface of the support portion 22 facing the front of the camera support mechanism 1. Yes. Screws 92, 92 are inserted into the fixing holes 29, 29 from the back side of the support portion 22, and fastened and fixed to a fixing portion 31 described later of the fixing member 3. In this way, the fixing member 3 is fixed to the base frame 2.

  Next, the fixing member 3 will be described. As shown in FIGS. 1 and 2, the fixing member 3 is formed in a substantially U-shaped groove extending substantially horizontally and opening forward when viewed from the front. The fixing member 3 includes a rectangular plate-like fixing portion 31 fixed in close contact with the support portion 22 of the base frame 2 and a rectangular shape extending substantially horizontally from the lower end portion of the fixing portion 31 toward the front. It has a plate-like lower support portion 32 and a rectangular plate-like upper support portion 33 extending substantially horizontally from the upper end portion of the fixed portion 31 toward the front. As shown in FIG. 6, a through-hole 35 having a circular shape in plan view is provided in the approximate center of the lower support portion 32 to insert the output shaft 41 of the first motor 4. A pair of screw holes 37 are provided on the left and right sides of the through-hole 35, respectively. A through hole 36 having a circular shape in a plan view for inserting the output shaft 51 of the second motor 5 is provided at substantially the center of the upper support portion 33. A pair of screw holes 38 are provided on both the left and right sides of the through hole 36.

  Next, the first motor 4 and the second motor 5 will be described. As shown in FIG. 6, the first motor 4 has its own output shaft 41 inserted into the through hole 35 of the lower support portion 32 upward from below. Further, the screw holes 14A and 14A provided in the pedestal portion 14 of the first motor 4 are aligned with the screw holes 37 and 37 provided in the lower support portion 32, and are fastened by screws 91 and 91, whereby the first motor. 4 is fixed to the lower support portion 32 of the fixing member 3. A plurality of power cables 24 are connected to the first motor 4.

  On the other hand, the second motor 5 has its output shaft 51 inserted into the through hole 36 of the upper support portion 33 downward from the upper side. Further, the screw holes 15A and 15A provided in the base portion 15 of the second motor 5 are aligned with the screw holes 38 and 38 provided in the upper support portion 33, and are fastened by screws 91 and 91, whereby the second motor 5 is secured. Is fixed to the upper support portion 33 of the fixing member 3. A plurality of power cables 25 are connected to the second motor 5. In a state where the first motor 4 and the second motor 5 are fixed to the fixing member 3, the output shaft 41 and the output shaft 51 are arranged coaxially with each other in the vertical direction.

  Next, the first bevel gear 11 and the second bevel gear 12 will be described. As shown in FIG. 4, the first bevel gear 11 has a shaft hole 61 (see FIG. 5) in the center and a tooth portion 62 on the side surface. With the tooth portion 62 facing upward, the tip end portion of the output shaft 41 of the first motor 4 is inserted into the shaft hole 61 from the lower side. As shown in FIG. 6, the first bevel gear 11 is provided with a screw hole 63 orthogonal to the shaft hole 61. With the output shaft 41 inserted into the shaft hole 61, the screw 26 is fastened to the screw hole 63 and brought into contact with the side surface of the output shaft 41, so that the first bevel gear 11 is fixed to the distal end portion of the output shaft 41. ing.

  On the other hand, as shown in FIG. 4, the second bevel gear 12 also has a shaft hole 71 (see FIG. 5) in the center and a tooth portion 72 on the side surface. With the tooth portion 72 facing downward, the tip end portion of the output shaft 51 of the second motor 5 is inserted from the upper side up to the middle of the shaft hole 71. As shown in FIG. 6, the second bevel gear 12 is provided with a screw hole 73 orthogonal to the shaft hole 71. With the output shaft 51 inserted into the shaft hole 71, the screw 27 is fastened to the screw hole 73 and brought into contact with the side surface of the output shaft 51, whereby the second bevel gear 12 is fixed to the distal end portion of the output shaft 51. ing. The material of the first bevel gear 11 and the second bevel gear 12 is preferably POM (polyacetal resin).

  Next, the connecting shaft 7 will be described. As shown in FIG. 4, the connecting shaft 7 is disposed between the first bevel gear 11 and the second bevel gear 12 that are coaxially opposed to each other. As shown in FIGS. 5 and 6, the lower end portion of the connecting shaft 7 is loosely inserted into the shaft hole 61 of the first bevel gear 11 from above. The upper end portion of the connecting shaft 7 is loosely inserted into the shaft hole 71 of the second bevel gear 12 from below. As a result, the connecting shaft 7 can be rotatably connected independently of each other while positioning the first bevel gear 11 and the second bevel gear 12 coaxially. As shown in FIGS. 2 and 5, a flat portion 75 is formed at the central portion in the longitudinal direction of the connecting shaft 7 and is formed in a substantially rectangular shape having a wide cross section perpendicular to the axial direction. In the flat portion 75, a through hole 76 for penetrating and fixing the rotary shaft 8 is provided orthogonal to the axial direction of the connecting shaft 7.

  Here, as shown in FIG. 5, the diameter of the flat portion 75 is larger than the diameters of both ends of the connecting shaft 7, and the diameters of the output shaft 41 of the first motor 4 and the output shaft 51 of the second motor 5. Bigger than. Therefore, the wide flat portion 75 can be provided with a through hole 76 for allowing the rotary shaft 8 to penetrate therethrough and to be fixed. Therefore, the strength of the connecting shaft 7 can be maintained even if the rotary shaft 8 is fixed through the through hole 76.

  Next, the rotating shaft 8 will be described. As shown in FIG. 6, the rotary shaft 8 is provided at a cylindrical body portion 86 located at the center in the axial direction and one end portion in the longitudinal direction of the body portion 86, and has a diameter smaller than the diameter of the body portion 86. A cylindrical reduced diameter portion 87 extending in the axial direction and a flange portion 85 provided in a flange shape at the other end of the body portion 86 are coaxially provided. The rotating shaft 8 having such a shape is inserted into the shaft hole 81 described later of the third bevel gear 13 and the through hole 76 provided in the flat portion 75 of the connecting shaft 7 from the reduced diameter portion 87 side. Yes. A step portion at the boundary between the body portion 86 and the reduced diameter portion 87 is engaged with the edge portion of the through hole 76. The tip of the rotary shaft 8 protrudes from the outlet of the through hole 76 opposite to the inlet into which the rotary shaft 8 is inserted. A nut 93 is fastened to the tip. Since the nut 93 is in close contact with the flat side surface of the flat portion 75, the rotating shaft 8 can be firmly fixed to the connecting shaft 7.

  Next, the third bevel gear 13 will be described. As shown in FIG. 2, the third bevel gear 13 has a shaft hole 81 (see FIG. 6) and includes a tooth portion 82 on a side surface. As shown in FIG. 6, the rotating shaft 8 is inserted into the shaft hole 81 from the left side with the tooth portion 82 facing the first bevel gear 11 and the second bevel gear 12. The flange portion 85 of the rotary shaft 8 is locked to the rear end surface of the third bevel gear 13. Thereby, it is possible to prevent the third bevel gear 13 from coming off from one end of the rotating shaft 8. The tooth portion 82 of the third bevel gear 13 meshes with the tooth portion 62 of the first bevel gear 11 and the tooth portion 72 of the second bevel gear 12.

  Next, the camera 17 will be described. As shown in FIG. 1, the camera 17 is a digital camera. The camera 17 includes a lens 18 and a flexible cable 19. A connector 20 is provided at the end of the flexible cable 19 for connection to an input terminal of an operating device (not shown). As shown in FIG. 7, the camera 17 is positioned on a camera pedestal portion 88 provided in a concave shape on the side surface of the rear end portion of the third bevel gear 13 and is fixed by screws (not shown). A state in which the lens 18 of the camera 17 faces the front is the origin position of the camera 17. As shown in FIG. 1, the camera support mechanism 1 rotates the camera 17 in the pan direction and the tilt direction from the origin position. As for the fixing method of the camera 17, for example, a separate camera pedestal (not shown) may be provided on the third bevel gear 13, and the camera 17 may be detachably fixed to the camera pedestal. .

  In the present embodiment, the first bevel gear 11, the second bevel gear 12, and the third bevel gear 13 have the same shape and are arranged as bevel gears with a gear ratio of 1: 1. The gear ratios may be changed by changing the sizes of.

  Next, the rotation operation (hereinafter also referred to as tilt rotation) of the camera 17 by the camera support mechanism 1 will be described. As shown in FIG. 8, for example, the second bevel gear 12 is rotated in the left direction indicated by the arrow, and the first bevel gear 11 is rotated in the right direction indicated by the arrow by the same angle (the same pulse). Then, since the third bevel gear 13 rotates in the upward direction indicated by the arrow, the camera 17 rotates by tilt. The angle of tilt rotation is the same as the angle at which the first bevel gear 11 and the second bevel gear 12 are rotated.

  Next, the rotation operation (hereinafter also referred to as pan rotation) of the camera 17 by the camera support mechanism 1 will be described. As shown in FIG. 9, for example, the second bevel gear 12 is rotated in the right direction indicated by the arrow, and the first bevel gear 11 is also rotated in the right direction indicated by the arrow by the same angle (the same pulse). Then, since the third bevel gear 13 rotates in the right direction indicated by the arrow, the camera 17 performs pan rotation. The angle at which the pan rotates is the same as the angle at which the first bevel gear 11 and the second bevel gear 12 are rotated.

Next, simultaneous rotation of the camera 17 by panning and tilting the camera 17 will be described. Here, as shown in FIG. 4, the direction in which the first motor 4 rotates counterclockwise is the plus direction, the direction in which the second motor 5 rotates clockwise is the plus direction, and the direction in which the third bevel gear 13 rotates downward is the plus direction. The direction in which the camera 17 rotates to the right (pan direction) is defined as the plus direction. When the pan angle is x, the tilt angle is y, the rotation angle of the second bevel gear 12 is a, and the rotation angle of the first bevel gear 11 is b, the following equation (1) is established. The tilt rotation described above is for a = b. Pan rotation is when a = −b.
(X, y) = ((ab) / 2, (a + b) / 2) (1)

For example, a case where the camera 17 is rotated 30 ° tilted downward and panned 30 ° to the right will be described. In this case, since (x, y) = (30, 30), from the above equation (1), (a, b) is as follows.
A−b = 60 (2)
A + b = 60 (3)
(2) From equation (3), (a, b) = (60, 0). Therefore, as shown in FIG. 10, if only the second bevel gear 12 is rotated 60 ° to the right, the camera 17 can be tilted 30 ° downward and rotated 30 ° to the right.

  As shown in FIGS. 5 and 6, in this embodiment, the output shaft 41 of the first motor 4 and the output shaft 51 of the second motor 5 are coaxially and independently of each other by the connecting shaft 7. Are connected so that they can rotate. Therefore, since the positional relationship between the output shaft 41 and the output shaft 51 does not deviate from each other, the camera 17 can be accurately and stably rotated in the pan direction and the tilt direction. Furthermore, since the output shaft 41 and the output shaft 51 are connected by the connecting shaft 7, the load applied to the output shaft 41 and the load applied to the output shaft 51 can be reduced.

  In the above description, the camera support mechanism 1 corresponds to the “imaging device support mechanism” of the present invention, the first motor 4 corresponds to the “first drive means” of the present invention, and the second motor 5 corresponds to the “first drive means” of the present invention. The output shaft 41 corresponds to a “first output shaft” of the present invention, and the output shaft 51 corresponds to a “second output shaft” of the present invention. The camera pedestal 88 provided on the third bevel gear 13 shown in FIG. 7 corresponds to the “support means” of the present invention.

  As described above, the camera support mechanism 1 according to the present embodiment can freely change the shooting direction in the pan direction and the tilt direction while fixing the camera 17 in a detachable manner. A first motor 4 and a second motor 5 are provided as drive sources. The first motor 4 and the second motor 5 are supported in a state where they are arranged to face each other. The first bevel gear 11 is fixed to the tip of the output shaft 41 of the first motor 4. The second bevel gear 12 is fixed to the tip of the output shaft 51 of the second motor 5. The output shaft 41 and the output shaft 51 are coaxially connected to each other by the connecting shaft 7 so as to be independently rotatable. A rotating shaft 8 is connected to the connecting shaft 7 orthogonally. A third bevel gear 13 is rotatably provided at one end portion of the rotating shaft 8, and the third bevel gear 13 meshes with the first bevel gear 11 and the second bevel gear 12, respectively. A camera 17 is fixed to a camera pedestal 88 provided on the third bevel gear 13.

  In such a structure, when the first bevel gear 11 and the second bevel gear 12 rotate at the same angle in opposite directions, the third bevel gear 13 rotates in the vertical direction, so that the camera 17 rotates by tilt. . On the other hand, when the first bevel gear 11 and the second bevel gear 12 rotate at the same angle in the same direction, the third bevel gear 13 does not rotate and the camera 17 rotates. In such a mechanism, the output shaft 41 of the first motor 4 and the output shaft 51 of the second motor 5 are coaxially connected to each other coaxially by the connecting shaft 7 so as to be independently rotatable. Therefore, since the positional relationship between the output shaft 41 and the output shaft 51 is maintained, the accuracy of the rotation operation of the camera 17 in the pan direction and the tilt direction can be improved. Furthermore, since the output shaft 41 and the output shaft 51 are connected by the connecting shaft 7, the load applied to the output shaft 41 and the load applied to the output shaft 51 can be reduced.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. Here, three modifications will be described.

  First, a first modification will be described with reference to FIG. In the above embodiment, as shown in FIG. 7, the camera 17 is detachably fixed to the camera base 88 provided on the third bevel gear 13. On the other hand, for example, the camera 17 may be fixed to the other end side opposite to the one end side where the third bevel gear 13 of the rotating shaft 8 is fixed.

  As shown in FIG. 11, in the camera support mechanism 100 according to the first modification, the rotation shaft 80 is orthogonally connected to the connection shaft 7. The third bevel gear 13 is fixed to one end side of the rotating shaft 80. On the other end side opposite to the one end side, a cylindrical camera pedestal portion 110 (corresponding to the “supporting means” of the present invention) is extrapolated and fixed. A camera 17 is fixed to the side surface of the camera base 110. The structure other than the rotating shaft 80 and the camera pedestal 110 is the same as that in the above embodiment.

  The rotation operation of the camera 17 in the tilt direction and the pan direction is the same as that in the above embodiment. In the camera support mechanism 100, the camera 17 can be brought closer to the connecting shaft 7 as compared with the above embodiment. Therefore, when the camera 17 is rotated in the pan direction, the rotation locus of the camera 17 that rotates about the connecting shaft 7 is smaller than that in the above embodiment. Therefore, the camera support mechanism 1 can be made compact.

  Next, a second modification will be described with reference to FIG. In the above embodiment, as shown in FIG. 6, the connecting shaft 7 is separate from the output shaft 41 of the first motor 4 and the output shaft 51 of the second motor 5, and can rotate independently. On the other hand, one end or the other end of the connecting shaft may be fixed to either the output shaft 41 of the first motor 4 or the output shaft 51 of the second motor 5, or may be provided integrally. Also good. In this case, the connecting shaft rotates integrally with the output shaft 41 or the output shaft 51. Therefore, it is necessary to reverse the connection structure of the connecting shaft and the rotating shaft to the above embodiment. That is, it is necessary to connect the rotating shaft through the connecting shaft.

  As shown in FIG. 12, in the camera support mechanism 150 as the second modification, the output shaft 151 of the second motor 5 and the connecting shaft 7 of the above embodiment are integrated. Therefore, the output shaft 151 extends below the output shaft 51 shown in FIG. 6 and is inserted halfway through the shaft hole 61 of the first bevel gear 11.

  On the other hand, as shown in FIG. 13, the rotating shaft 180 provided with the third bevel gear 13 at one end has a shape different from that of the rotating shaft 8 of the above embodiment. The rotating shaft 180 includes a columnar shaft main body 181 and an enlarged diameter portion 182 that is provided at one end of the shaft main body 181 and is formed to be larger than the diameter of the shaft main body 181. . The third bevel gear 13 is rotatably fixed to the other end of the shaft main body 181. A shaft hole 185 orthogonal to the axial direction of the rotating shaft 180 is provided in the enlarged diameter portion 182. The output shaft 151 (see FIGS. 12 and 13) of the second motor 5 is inserted into the shaft hole 185.

  In such a camera support mechanism 150, the rotation shaft 180 can rotate independently of the output shaft 151. Therefore, similarly to the above embodiment, the camera 17 can be rotated in the tilt direction and the pan direction by controlling the rotation directions of the first bevel gear 11 and the second bevel gear 12. In the camera support mechanism 150, the connecting shaft 7 (see FIG. 6) of the above embodiment is integrated with the output shaft 151 of the second motor 5. Thereby, the shift | offset | difference of a connection shaft and a 2nd bevel gear can be eliminated. And since the mutual positional relationship between the first bevel gear 11 and the second bevel gear 12 can be maintained with higher accuracy, the rotational accuracy of the camera 17 can be further improved. In addition, since the number of parts is smaller than in the above embodiment, the part cost can be reduced.

  Next, a third modification will be described with reference to FIG. In the second modification, the connecting shaft is integrated with the output shaft 151 of the second motor 5, but the connecting shaft is fixed to or integrated with the second bevel gear 12 (or the first bevel gear 11). The same effects as those of the second modification can be obtained.

  The camera support mechanism 200 as a third modification includes a second bevel gear 120 in which the second bevel gear 12 and the connecting shaft 7 (see FIG. 6) of the above embodiment are integrated. The second bevel gear 120 includes a shaft hole 171 having a bottom portion, a tooth portion 172, and a shaft portion 173 extending in the axial direction from the center of the rear end surface of the second bevel gear 120. The shaft portion 173 corresponds to the connecting shaft 7 of the above embodiment. The shaft portion 173 rotates integrally with the second bevel gear 120. The second bevel gear 120 is fixed to the output shaft 51 of the second motor 5. Therefore, the shaft portion 173 rotates integrally with the output shaft 51 of the second motor 5.

  The shaft portion 173 of the second bevel gear 120 is inserted into the shaft hole 185 of the rotating shaft 180, and the tip portion is inserted partway through the shaft hole 61 of the first bevel gear 11. The shaft portion 173 acts in the same manner as the output shaft 151 of the second motor 5 of the second modification. Also in the third modified example, it is possible to eliminate the deviation between the connecting shaft and the second bevel gear. And since the mutual positional relationship between the first bevel gear 11 and the second bevel gear 120 can be reliably maintained, the rotational accuracy of the camera 17 can be further improved. In addition, since the number of parts is smaller than in the above embodiment, the part cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Camera support mechanism 4 1st motor 5 2nd motor 7 Connection shaft 8 Rotating shaft 11 1st bevel gear 12 2nd bevel gear 13 3rd bevel gear 17 Camera 41 Output shaft 51 Output shaft 61 Shaft hole 71 Shaft hole 75 Flat part 88 Camera pedestal part 100 Camera support mechanism 110 Camera pedestal part 120 Second bevel gear 150 Camera support mechanism 151 Output shaft 161 Shaft hole 173 Shaft part 180 Rotating shaft 182 Expanding part 185 Shaft hole 200 Camera support mechanism

Claims (7)

An imaging device support mechanism for rotating the imaging direction of the imaging device in the pan direction and the tilt direction,
First driving means;
Second driving means disposed at a position facing the first driving means;
A first bevel gear provided on a first output shaft of the first driving means and transmitting a rotational driving force of the first driving means;
A second bevel gear provided on a second output shaft of the second drive means disposed coaxially with the first output shaft, and transmitting a rotational driving force of the second drive means;
A connecting shaft that is arranged coaxially with the first output shaft and the second output shaft, and that rotatably connects the first output shaft and the second output shaft;
A rotating shaft connected orthogonally to the connecting shaft;
A third bevel gear that is rotatably provided at one end of the rotating shaft and meshes with the first bevel gear and the second bevel gear;
An image pickup apparatus support mechanism, comprising: the third bevel gear or a support unit that is provided on the rotation shaft and supports the image pickup apparatus.   One end and the other end of the connecting shaft are rotatably inserted into a shaft hole provided at the center of the first bevel gear and a shaft hole provided at the center of the second bevel gear, respectively. The imaging device support mechanism according to claim 1, wherein One of the one end and the other end of the connecting shaft is fixed to the first bevel gear or the second bevel gear,
The imaging apparatus support mechanism according to claim 1, wherein the other is rotatably inserted into a shaft hole provided at a center of the second bevel gear or the first bevel gear.   The imaging device support mechanism according to claim 1, wherein the connecting shaft is fixed to or integrally with either the first output shaft or the second output shaft. The diameter of the rotating shaft is larger than the diameter of the first output shaft and the second output shaft,
The imaging apparatus support mechanism according to claim 4, wherein the connection shaft is rotatably connected to the rotation shaft. The diameter of the connecting shaft is larger than the diameter of the first output shaft and the second output shaft,
The imaging apparatus support mechanism according to claim 1, wherein the rotation shaft is rotatably connected to the connection shaft.   The imaging device support mechanism according to claim 1, wherein the support means is provided at the other end portion of the rotating shaft.

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