JP2005163845A - Leg device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the attitude of a camera platform to a proper position horizontally and vertically, and easily adjust the attitude of it in accordance with action of the subject. <P>SOLUTION: In this leg device, the camera platform 7 is installed on leg bodies 1 through a ball joint 4 comprising a protruded ball part 41 and a protruded ball receiving part 42 rotatably engaged with the protruded ball part 41. In the protruded ball part 41, annular grooves 43, and curved grooves 44 crossing the annular grooves 42 at a plurality of positions are provided. The protruded ball receiving part 42 is provided with engagement protrusions 45 that can be engaged with the annular grooves 43 and the curved grooves 44. As the engagement protrusions 45 are engaged with the annular grooves 43 or the curved grooves 44, the camera platform is rotated straight horizontally and vertically. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a leg device for supporting a silver salt still camera, a video still camera, a video camera and the like.

  The leg device that supports the camera is used to prevent imaging blur when shooting a subject. This leg device is designed to have three legs, and a tripod device (for example, Patent Documents 1, 2, and 3) that can be made into one leg, has a structure having one leg. A monopod device that is designed and can be made into three legs (for example, Patent Documents 4 and 5), is designed to have two legs, and is used with two legs A bipod device (for example, Patent Document 6) is known.

The legs of the leg device configured as described above are telescopic, and the legs are stretched when shooting, and the legs are contracted when shooting is not performed.
By the way, a photographer who is semi-maniac often shoots a subject continuously or frequently shoots a subject. In order to eliminate this, a tripod device is often used.

When shooting a subject from multiple directions with a camera attached to a tripod device at various events such as athletic events, weddings, competitions, etc., the tripod device must be rotated horizontally and vertically. To avoid collision with the camera, it is necessary to extend and retract the leg, and depending on the shooting angle, the camera may be removed from the tripod device for shooting. I will escape.
Therefore, in such a case, it is generally less instantaneous and free to shoot instantly and freely with a camera attached to a monopod device, so that there is less blurring and it is possible to secure time for focusing, and a photo with good image quality. Since there are many cases where a video can be taken, a photographer who is semi-maniac uses a monopod device.

Moreover, there is a tripod device described in Patent Document 3 as a tripod device convenient for use by a photographer who is semi-maniac. FIG. 12 is a cross-sectional view showing a configuration of a tripod device described in Patent Document 3. In this tripod apparatus, in a configuration in which a platform 102 is mounted on a gantry 101 in which upper ends of three legs 100 are connected to be openable and closable, a convex ball portion 104 is provided on the gantry 101 via a shaft portion 103. A convex ball receiving portion 105 that is rotatably fitted to the convex ball portion 104 and a connecting body 107 having a long hole 106 that is opened from the convex ball receiving portion 105 to the outer peripheral surface and into which the shaft portion 103 is inserted are provided. The pan head 102 is pivotally attached to the connecting body 107, and the pan head 102 has a total of three in the horizontal direction around the convex ball portion 104, the left-right direction along the elongated hole, and the front-rear direction. It can be rotated in the direction.
Japanese Utility Model Publication No. 59-101097 Japanese Utility Model Publication No.59-141291 Japanese Patent Laid-Open No. 11-52481 JP-A-5-119392 Japanese Patent Laid-Open No. 6-18797 Japanese Patent Laid-Open No. 7-146512

  However, in the tripod device described in Patent Document 3, when the posture is adjusted in the horizontal direction, the convex ball receiving portion 105 is freely rotated with respect to the convex ball portion 104, and the trajectory is straight. Since the posture cannot be adjusted and the angle of view is undulated, it is difficult to accurately adjust the posture to an appropriate position, and when adjusting the posture in the left-right direction, it is set by the shaft portion 103 and the long hole 106. It is only possible to adjust the posture only in the specified direction, and it is only possible to adjust the posture in the front-rear direction. Further, since the pan head 102 cannot be adjusted to the vertical position, the vertical photographing cannot be performed.

  The present invention has been made in view of such circumstances, and the main object is to provide the convex ball portion with an annular groove and a curved groove that intersects the annular groove at a plurality of positions of the annular groove, An engaging convex portion that can be engaged with the annular groove and the curved groove is provided, or the convex ball receiving portion is provided with an annular groove and a curved groove that intersects the annular groove at a plurality of positions of the annular groove. By providing an engaging projection that can be engaged with the annular groove and the curved groove on the part, the posture of the pan head can be accurately adjusted to an appropriate position in the horizontal direction and the undulation direction even in a tripod device, for example. It is possible to provide a leg device that can easily adjust the posture according to the motion of the subject.

  Another object of the present invention is to provide a pivot connecting part that pivotally connects a pan head to the ball joint, so that even with a tripod device, the pan head can be accurately moved to appropriate positions in the horizontal direction and the undulation direction. It is an object to provide a leg device that can adjust the posture and can perform vertical photographing.

  Another object is to arrange the curved grooves in radial directions from each intersecting position with the annular groove, so that a plurality of engaging projections can be engaged with the annular groove and the curved groove. It is providing the leg apparatus which can raise.

  Another object is to provide a plurality of engaging protrusions at positions where the engaging grooves are engaged with one curved groove, and by disposing the annular groove at positions where the engaging protrusions are engaged, the rigidity of the ball joint is increased. It is to provide a leg device that can be further enhanced.

  Another object is the first and second movable bodies that are movable in the direction of contact with and separating from the ball joint and the rotating connecting portion, and the lever bodies that individually move the movable bodies by operating in different directions. By providing a leg device, it is possible to provide a leg device capable of adjusting the posture in the horizontal direction, adjusting the posture in the undulating direction, and adjusting to the vertical position by operating one lever body.

  Another object is to provide a leg device capable of smoothly rotating the pan head by providing a rotation auxiliary material between the convex ball portion and the convex ball receiving portion.

  Another object is to provide a lifting shaft body and an operating body that can lift and lower the lifting shaft body and prohibit the operation of the lifting shaft body at the lifting position. It is providing the leg apparatus which can simplify the raising / lowering prohibition operation of.

  Another object of the present invention is to provide a leg device that can quickly capture a photographing opportunity by placing a camera on the camera platform.

  The leg device according to the present invention is a leg device including a ball joint, wherein the convex ball portion of the ball joint has an annular groove and a curved groove that intersects the annular groove at a plurality of positions of the annular groove, The convex joint receiving portion of the ball joint has an engaging convex portion that can be engaged with the annular groove and the curved groove, or the convex ball receiving portion of the ball joint has an annular groove and a plurality of positions of the annular groove. The convex ball portion of the ball joint has an engaging convex portion that can be engaged with the circular groove and the curved groove.

  In the present invention, for example, the pan head can be rotated straight along the annular groove in the horizontal direction, and further, the pan head can be rotated straight along the curved groove in the undulation direction of the left and right and front and rear. Therefore, it is possible to accurately adjust the posture of the camera platform to appropriate positions in the horizontal direction and the undulating direction, and to adjust the posture from a plurality of horizontal positions to appropriate positions in the undulating direction. It is easy to adjust the posture according to the movement of the subject.

  Moreover, the leg apparatus which concerns on this invention is equipped with the rotation connection part which connected the pan head to the said ball joint so that rotation was possible, It is characterized by the above-mentioned.

  In this invention, the pan head can be rotated straight in the horizontal direction along the annular groove, and further, the pan head can be rotated straight in the undulation direction in the left and right and front and rear directions along the curved groove. Therefore, it is possible to accurately adjust the posture of the pan head to appropriate positions in the horizontal direction and the undulating direction, and to adjust the posture from a plurality of horizontal positions to appropriate positions in the undulating direction. The pan head can be adjusted to a vertical position by the rotating unit, and vertical shooting can be performed.

  Further, the leg device according to the present invention is characterized in that the curved groove is arranged in a radial direction from each of the intersecting positions with the annular groove.

  In this invention, it is possible to provide the engagement convex portion at a position where the curved groove intersects with the annular groove, and a plurality of engagement convex portions can be engaged with the annular groove and the curved groove. The rigidity of the ball joint can be increased and the durability can be improved.

  In the leg device according to the present invention, a plurality of the engaging convex portions are arranged at positions where the engaging convex portions are engaged with one curved groove, and the annular grooves are arranged at positions where the engaging convex portions are engaged with the engaging convex portions. It is characterized by.

  In this invention, since there are a plurality of engaging projections, annular grooves, and curved grooves, the rigidity of the ball joint can be further increased, and the durability can be further improved.

  In addition, the leg device according to the present invention is configured such that the first and second movable bodies that can move in the direction of contact with and away from the ball joint and the rotation connecting portion, and the respective movable bodies are individually operated by operating in different directions. And a lever body to be moved.

  In this invention, by operating one lever body, it is possible to adjust the attitude in the horizontal direction, adjust the attitude in the undulation direction, and adjust to the vertical position. However, it is possible to easily perform the posture adjustment operation.

  Moreover, the leg apparatus which concerns on this invention has a rotation assistance material between the said convex ball part and a convex ball receiving part, It is characterized by the above-mentioned.

  In this invention, since the pivotability of the pan head can be enhanced by the pivot assisting material, the pan head can be smoothly pivoted.

  Further, the leg device according to the present invention is capable of prohibiting the operation of the elevating shaft body at the elevating position by elevating and lowering the elevating shaft body that mounts the ball joint on the leg body so as to be movable up and down. And an operating body as described above.

  In this invention, by operating one operating body, the pan head can be lifted and lowered via the lifting shaft body and the ball joint, and this lifting position can be maintained. Therefore, the up / down operation and the up / down prohibition operation in the up / down state can be simplified, and the shooting angle in the up / down direction can be set quickly.

  The leg device according to the present invention is characterized in that a camera is placed on the pan head.

  In the present invention, since the camera is integrated with the camera platform, it is possible to quickly capture the photographing opportunity.

  According to the present invention, for example, the pan head can be rotated straight in the horizontal direction and the undulation direction along the annular groove and the curved groove, so that the pan head can be accurately moved to appropriate positions in the horizontal direction and the undulation direction. The posture can be adjusted, and the posture can be adjusted from a plurality of horizontal positions to an appropriate position in the undulation direction, so that it is easy to adjust the posture according to the movement of the subject. In addition, according to the present invention, it is possible to accurately adjust the posture of the camera platform to appropriate positions in the horizontal direction and the undulation direction, and to adjust the camera platform to a vertical position, thereby performing vertical shooting. Can do.

  Further, according to the present invention, even with a tripod device, the pan head can be accurately adjusted to an appropriate position in the horizontal direction and the undulation direction, and vertical shooting can be performed.

  Further, according to the present invention, since the plurality of engaging convex portions can be engaged with the annular groove and the curved groove, the rigidity of the ball joint can be increased and the durability can be improved.

  In addition, according to the present invention, since there are a plurality of engaging protrusions, annular grooves, and curved grooves, the rigidity of the ball joint can be further increased, and the durability can be further improved.

  In addition, according to the present invention, it is possible to adjust the posture in the horizontal direction, adjust the posture in the undulation direction, and adjust to the vertical position by operating one lever body. The posture adjustment operation can be easily performed although it can be adjusted.

  Moreover, according to this invention, since the pivotability of a pan head can be improved with a rotation assistance material, a pan head can be rotated smoothly.

  Further, according to the present invention, the lifting operation and the lifting prohibiting operation in the lifting state can be simplified, and the shooting angle in the vertical direction can be set quickly.

  In addition, according to the present invention, it is possible to quickly capture a photographing opportunity with the camera placed on the pan head.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. 1 is a conceptual diagram showing a configuration of a leg device according to the present invention, FIG. 2 is an enlarged conceptual diagram of a main part, FIG. 3 is a conceptual diagram further expanding the main part, and FIG. 4 is a plan conceptual diagram of a convex ball part, FIG. 5 is an enlarged conceptual diagram showing another form of the annular groove and the curved groove, FIG. 6 is an enlarged conceptual diagram of the lifting mechanism portion, FIG. 7 is a conceptual diagram showing a state in which the pan head is rotated in the undulation direction, and FIG. It is a conceptual diagram which shows the state which adjusted the stand to the vertical position.

  The leg device includes three legs 1 that can be freely expanded and contracted, a gantry 2 in which upper ends of the legs 1 are connected to be openable and closable, an elevating shaft 3 that is supported by the gantry 2 so as to be movable up and down, and the elevating and lowering units. A connecting body 5 connected to the shaft body 3 via a ball joint 4 having a convex ball portion 41 and a convex ball receiving portion 42, and a pan head 7 connected to the connecting body 5 via a rotation connecting portion 6 Is a tripod device.

  The gantry 2 is formed in a cylindrical shape with a leg 1 coupled to the lower portion thereof, and an elevating shaft body 3 is fitted in the hole 2a of the gantry 2 so as to be movable up and down, and penetrates from the middle of the hole 2a. A through hole 2b and a recess 2c facing the through hole 2b and the hole 2a are provided, and an operating body 8 is supported in the through hole 2b so as to be rotatable and movable. The elevating shaft is supported in the recess 2c. A third moving body 9 is accommodated that can move in a direction in which it is in contact with and away from the peripheral surface of the body 3.

  Rack teeth 3a are provided at the lower part of the lifting shaft 3, and a convex ball part 41 is integrally provided at the upper part, and a convex ball receiving part 42 is externally fitted to the convex ball part 41, The convex ball receiving portion 42 is formed integrally with the connector 5.

  The operating body 8 includes a shaft portion 8a supported by the through hole 2b and a gripping portion 8b pivotally supported by the shaft portion 8a. The shaft portion 8 a is provided with a pinion 8 c that can mesh with the rack teeth 3 a and an occlusion portion 8 d that can mesh with the third moving body 9. The third moving body 9 includes a braking member 9a facing the lifting shaft body 3 and a rotating member 9b that can rotate relative to the braking member 9a and move the braking member 9a by relative rotation. A cam is provided between the braking member 9a and the rotating member 9b, and the braking member 9a is moved by the rotation of the rotating member 9b. The operating body 8 and the third moving body 9 configured as described above move the operating body 8 in a direction approaching the rack teeth 3a, so that the pinion 8c meshes with the rack teeth 3a, and the rack teeth By moving in a direction away from 3a, the engagement of the pinion 8c with the rack teeth 3a is disengaged, and the engagement portion 8d is engaged with the rotating member 9b, and the operating body 8 is rotated in one direction in this engagement state. Thus, the rotating member 9b rotates and the braking member 9a presses the lifting shaft 3 through the cam.

  The ball joint 4 is provided at equal intervals so as to intersect the annular groove 43 at a plurality of positions of the spherical convex ball portion 41 and the convex ball receiving portion 42 and the annular groove 43 provided in the convex ball portion 41 and the annular groove 43. The curved groove 44 is formed, and the annular groove 43 and the engaging convex portion 45 projecting from the convex ball receiving portion 42 so as to be engaged with the curved groove 44 are provided. Since the convex ball portion 41 is formed integrally with the lifting shaft body 3 and the convex ball receiving portion 42 is opened in a circular shape at the lower portion, the convex ball receiving portion 42 is on one side with respect to the central axis of the lifting shaft body 3. Can be undulated by about 45 ° and 90 ° on both sides (see FIG. 7).

  The curved grooves 44 are arranged in a radial direction from positions intersecting the annular grooves 43, communicate with each other at positions intersecting with the annular grooves 43, and further communicate with the annular grooves 43. A plurality of annular grooves 43 are provided at equal intervals so as to be substantially orthogonal to the curved grooves 44. The annular groove 43 and the curved groove 44 are formed so as to have a substantially semicircular cross-sectional shape (see FIG. 5A), but the cross-sectional shape is substantially V-shaped (see FIG. 5B). ), Or a substantially concave shape (see FIG. 5C), and the cross-sectional shape is not particularly limited. In addition, the number of the curved grooves 44 can be increased as the distance between the curved grooves 44 is decreased, and the allowable undulations of the pan head 7 can be increased. Since the contact area is reduced, an appropriate interval is preferable.

  The engaging protrusion 45 is a position that engages with two curved grooves 44 having a phase difference of 180 °, and a plurality of (for example, four, but one curved groove 44) are engaged with the plurality of annular grooves 43. 2), and is further arranged at a position facing the one point P. When the pan head 7 is rotated in the horizontal direction at an appropriate undulation position, each engaging projection 45 is formed in an annular groove. When the pan / tilt head 7 is rotated in the undulation direction, the engaging protrusions 45 are configured to engage with appropriate two curved grooves 44 having a phase difference of 180 °. The engaging convex portion 45 may be disposed at a position where it engages with one curved groove 44.

  As described above, in the gap between the convex ball portion 41 and the convex ball receiving portion 42 provided with the annular groove 43, the curved groove 44 and the engaging convex portion 45, the rotation auxiliary material made of a viscous lubricant, a rolling material or the like. 10 is provided, and the relative rotation of the convex ball portion 41 and the convex ball receiving portion 42 is enhanced.

  The connecting body 5 is formed integrally with one side portion of the convex ball receiving portion 42, and has a cylindrical first connecting portion 5b having a first fitting hole 5a inside, and a bent portion at the first connecting portion 5b. 5c, and has a cylindrical second connecting portion 5e having a second fitting hole 5d inside, and a fitting cylindrical portion of the rotating connecting portion 6 at the end of the second connecting portion 5e. 6a is provided integrally. The first connecting portion 5b and the second connecting portion 5e are orthogonally connected to the position displaced in the front-rear direction in FIG. The 1st fitting hole 5a is open | released inside the convex ball | bowl receiving part 42, The 1st which can move to the direction (left-right direction in FIG. 1) which contacts / separates the convex ball part 41 in this 1st fitting hole 5a. The movable body 11 is fitted inside. The second fitting hole 5d is opened to the inside of the fitting tube portion 6a, and the second fitting hole 5d is in contact with and separated from the pivot shaft portion 6b of the rotation connecting portion 6 (vertical direction in FIG. 1). The second movable body 12 that can be moved to the inside is fitted.

  The bent portion 5c has a longitudinal axis in FIG. 1 and a support hole communicating with the first fitting hole 5a and the second fitting hole 5d. The movable bodies 11 and 12 are individually connected to the support holes. A lever body 13 is moved and supported so as to be rotatable and movable in the axial direction.

  FIG. 9 is a conceptual diagram showing the configuration of the lever body portion. The lever body 13 is composed of a rod member whose axis is in the front-rear direction in FIG. 1, and the first and second cams 13 a, 13b and a third cam 13c at a position facing the second fitting hole 5d. As shown in FIGS. 1 and 9, the first to third cams 13a, 13b, and 13c are disposed in the circumferential direction at positions spaced apart in the axial direction, and the second cam 13b is the first cam. The third cam 13c is arranged on one end side with respect to the first cam 13a. Further, the first moving body 11 is provided with an engaging portion 11a that can be individually engaged with the first and second cams 13a and 13b. An engaging portion 12a capable of engaging with the cam portion 13c is provided. The positional relationship between the first and second cams 13a and 13b and the engaging portion 11a is such that when the first cam 13a is engaged with the engaging portion 11a, the second cam 13b is engaged. When the second cam 13b is engaged with the engaging portion 11a, the first cam 13a is not engaged with the engaging portion 11a.

  Then, the first cam 13a and the engaging portion 11a are rotated by rotating the lever body 13 in one direction in a normal state where the first cam 13a is stopped at a position where it can engage with the engaging portion 11a. The first moving body 11 is pressed against the convex ball portion 41, and the lever body 13 is moved from the normal state to one side in the longitudinal direction (in the direction of arrow F1 in FIG. 9), so that the first cam 13a is The second cam 13b is engaged with the engaging portion 11a, and the second cam 13b and the engaging portion 11a are engaged by rotating the lever body 13 in one direction in this state. The first moving body 11 is pressed against the convex ball portion 41 via the portion 11a, and the lever body 13 is moved from the normal state to the other longitudinal direction (in the direction of arrow F2 in FIG. 9). The second cam 13a is not engaged with the engaging portion 11a. Thus, the third cam 13c is engaged with the engaging portion 12a. In this state, the lever body 13 is rotated in one direction, whereby the second cam 13c and the engaging portion 12a are connected to the second cam 13c. The moving body 12 is pressed against the pivot shaft 6b.

  Further, the convex ball portion 41 pressed to the left in FIG. 1 by the movement of the first moving body 11 is displaced to the left in FIG. 1 with respect to the convex ball receiving portion 42, and is provided on the convex ball portion 41. The engagement resistance between the annular groove 43 and the curved groove 44 and the engagement convex portion 45 provided in the convex ball receiving portion 42 is changed. When the first moving body 11 is pressed against the convex ball portion 41 by the first cam 13a engaging with the engaging portion 11a, the engagement resistance between the curved groove 44 and the engaging convex portion 45 is an annular groove. 1 and the convexity receiving portion 42 in FIG. 1 can be rotated in the direction parallel to the annular groove 43, that is, in the horizontal direction. It is made not to rotate freely in the direction along the direction, that is, the undulation direction. Further, when the first cam 13a is not engaged with the engaging portion 11a and the second cam 13b is engaged with the engaging portion 11a, the curved groove 44, the annular groove 43 and the engaging convex portion 45 is set to a value that allows the convex ball receiving portion 42 to be rotated in a direction parallel to the annular groove 43 and in a direction along the curved groove 44. In addition, when the first moving body 11 is pressed against the convex ball portion 41 by the second cam 13b engaging with the engaging portion 11a, the curved groove 44, the annular groove 43, and the engaging convex portion 45 are interposed. In FIG. 1, the convex ball receiving portion 42 cannot be rotated in a direction parallel to the annular groove 43 and a direction along the curved groove 44.

The rotation connecting part 6 includes a fitting cylinder part 6 a formed integrally with the connecting body 5, and a pivot shaft part that is rotatably fitted in the fitting cylinder part 6 a and is integrally formed with the pan head 7. 6b, and the pivot shaft 6b is rotatably fitted in the fitting cylinder 6a. Further, a limiting means for limiting the amount of rotation of the camera platform 7 is provided between the connecting body 5 and the camera platform 7. This restricting means comes into contact with two stoppers 14a, 14b provided in the second connecting portion 5e so as to be spaced apart from each other in the rotational direction of the camera platform 7, and one stopper 14a when the camera platform 7 is rotated to the horizontal position. The first abutting portion 14c and the second abutting portion 14d that abuts against the other stopper 14b when the pan head 7 is rotated to the vertical position.
The pan head 7 has a screw hole 7a penetrating in the vertical direction and a male screw 15 screwed into the screw hole 7b, and is integrally formed with the pivot shaft 6b.

  A camera is placed on the pan head 7 of the leg device configured as described above. In this way, in the leg device in which the camera is placed on the pan head 7, the ball joint 4 is mounted on the leg 1 via the lifting shaft 3 so as to be movable up and down, and the ball joint 4 is connected via the connecting body 5. Since the rotary connecting portion 6 is connected and the pan head 7 is connected to the rotary connecting portion 6, when the operating body 8 is rotated, the elevating shaft body 3, the ball joint 4, the connecting body 5, and the turn The pan head 7 can be moved up and down via the moving connecting portion 6, the posture of the pan head 7 can be adjusted to an appropriate position in the horizontal direction and the undulating direction by the ball joint 4, and the rotating connecting portion 6. Thus, the pan head 7 can be adjusted to the horizontal position and the vertical position.

  FIG. 10 is a functional conceptual system diagram of the operating tool. When the pan / tilt head 7 is lifted / lowered, the lifting / lowering shaft body 3 can be lifted / lowered via the pinion 8c and the rack teeth 3a by gripping and rotating the gripping portion 8b of the operating body 8. In this lifted state, the operating body 8 is pulled and moved in a direction away from the lifting shaft 3 to rotate, thereby rotating the rotating member 9b via the occlusal portion 8d and bringing the braking member 9a closer to the lifting shaft 3. The braking member 9a can be pressed against the lifting shaft 3, the operation of the lifting shaft 3 can be prohibited, and the head 7 can be maintained in the lifted state.

  The posture adjustment of the camera platform 7 in the horizontal direction and the undulation direction and the adjustment to the vertical position can be performed by operating one lever body 13. FIG. 11 is a functional conceptual system diagram of the lever body. When adjusting the posture of the pan head 7 to the horizontal position, the normal state in which the first cam 13a is stopped at a position where it can engage with the engaging portion 11a and the pan head 7 is stopped at the horizontal position. The posture can be adjusted to an appropriate position in the horizontal direction by rotating the lever body 13 in FIG. 1 in the horizontal direction and rotating the pan head 7 in the horizontal direction in the state of FIG. After adjusting the posture to the horizontal position, the first moving body 11 moves to the left in FIG. 1 via the first cam 13a by turning the lever body 13 to the right, for example. The convex ball portion 41 can be pressed to prevent the pan head 7 from rotating at the ball joint 4, and the lever body 13 can be turned to the left to turn the moving body 11 through the first cam 13 a. The pressure can be released, and the camera platform 7 can be rotated in the horizontal direction.

  When the posture of the pan head 7 is adjusted to an appropriate position in the undulation direction as shown in FIG. 7, the lever body 13 is pulled forward in FIG. 1 (in the direction of arrow F1 in FIG. 9) and the second cam 13b is engaged. By making it the state engaged with the part 11a, the pan head 7 can be swung up and down around the convex ball part 41 to the left and right and back and forth. After adjusting the posture to the position of the undulation direction, for example, by turning the lever body 13 to the right, the first moving body 11 moves to the left in FIG. 7 via the second cam 13a. The convex ball portion 41 can be pressed to inhibit the pan head 7 from rotating at the ball joint 4, and the lever body 13 can be turned to the left to turn the moving body 11 through the second cam 13b. The pressure can be released, and the pan head 7 can be rotated in the undulation direction.

  When the pan head 7 is adjusted from the horizontal position in FIG. 1 to the vertical position in FIG. 8, the lever body 13 is pushed backward (in the direction of arrow F2 in FIG. 9) in FIG. 1, and the third cam 13c is engaged. By engaging with the portion 12a, the pan head 7 can be rotated about 90 ° around the pivot coupling portion 6, and the pan head 7 can be adjusted to a vertical position (see FIG. 8), after that, for example, by turning the lever body 13 to the right, the second moving body 12 moves upward in FIG. 8 via the third cam 13c. 6b can be pressed to prevent the pan head 7 from rotating at the rotation connecting portion 6, and the lever 12 can be turned to the left to press the moving body 12 via the third cam 13c. Can be released, and the pan head 7 can be rotated to the horizontal position.

  In this way, the ball joint 4 in which the pan head 7 can be rotated to an appropriate position in the horizontal direction and the undulation direction by operating one lever body 13 has an annular groove 43 and a curved groove 44 in the convex ball portion 41. Are provided, and the engaging projection 45 is provided on the protruding portion receiving portion 42 fitted on the protruding portion 41, so that the posture of the pan head 7 is adjusted to an appropriate position in the horizontal direction. In this case, the convex ball receiving portion 42 can be rotated in a state in which the engaging convex portion 45 is engaged with the annular groove 43, and the posture of the pan head 7 can be straightly adjusted to the horizontal position. Further, when adjusting the posture of the pan head 7 to an appropriate position in the undulation direction, the convex ball receiving portion 42 can be rotated in a state where the engaging convex portion 45 is engaged with the curved groove 44. The posture can be adjusted straight to the position in the undulation direction. Moreover, since each annular groove 43 and each curved groove 44 communicate with each other at the intersection, the posture can be adjusted to an appropriate position in the undulation direction at an appropriate position adjusted to the horizontal position. It is possible to adjust the posture to the horizontal position at an appropriate position adjusted to the position of the direction, in other words, in the state where the pan head 7 is inclined, for example, 10 degrees with respect to the central axis of the lifting shaft 3 The posture can be adjusted to the position, the posture of the pan head 7 can be quickly changed to multiple directions, and the vertical position can be adjusted in addition to the posture adjustment to the horizontal position and the undulation direction position. it can. Therefore, the posture adjustment according to the motion of the subject can be easily and quickly performed.

In the embodiment described above, the convex ball portion 41 is provided with the annular groove 43 and the curved groove 44, and the convex ball receiving portion 42 is provided with the engaging convex portion 45. Alternatively, the annular groove 43 and the curved groove 44 may be provided, and the convex protrusion 41 may be provided with the engaging convex 45. In addition, the ball joint 4 is configured to be attached to the leg 1 via the lifting shaft 3 and the gantry 2, but the ball joint 4 may be configured to be directly attached to the gantry 2 or the leg 1. Moreover, although it was set as the structure which has the some annular groove 43, the number of the annular grooves 43 may be one.
Further, as a means for prohibiting the relative rotation of the convex ball portion 41 and the convex ball receiving portion 42, the moving body 11 that moves by the operation of the lever body 13 is incorporated, but in addition, a disc brake, drum brake, air A configuration incorporating a brake or the like may be employed, and the configuration of the means for prohibiting relative rotation is not particularly limited.

Further, the leg device according to the present invention may be a tripod device including three legs 1 or a monopod device including one leg 1 or a bipod device including two legs 1. Good.
Moreover, the leg apparatus which concerns on this invention is the structure provided with the pan head 7, and the structure which eliminated this pan head 7 may be sufficient.

It is a conceptual diagram which shows the structure of the leg apparatus which concerns on this invention. It is an expansion conceptual diagram of the principal part of the leg device concerning the present invention. It is the conceptual diagram which expanded further the principal part of the leg apparatus which concerns on this invention. It is a plane conceptual diagram of the convex ball part of the leg device concerning the present invention. It is an expansion conceptual diagram which shows the other form of the annular groove and curved groove | channel of the leg apparatus which concerns on this invention. It is an expansion conceptual diagram of the raising / lowering mechanism part of the leg apparatus which concerns on this invention. It is a conceptual diagram which shows the state which rotated the pan head of the leg apparatus which concerns on this invention to the undulation direction. It is a conceptual diagram which shows the state which adjusted the pan head of the leg apparatus which concerns on this invention to the vertical position. It is a conceptual diagram which shows the structure of the lever body part of the leg apparatus which concerns on this invention. It is a functional concept system figure of the operation object of the leg device concerning the present invention. It is a functional conceptual system figure of the lever body of the leg device concerning the present invention. It is sectional drawing which shows the structure of the tripod apparatus described in patent document 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Leg body 3 Elevating shaft body 4 Ball joint 6 Rotating connection part 8 Operation body 10 Rotation auxiliary material 11 1st moving body 12 2nd moving body 13 Lever body 41 Convex ball part 42 Convex ball receiving part 43 Annular groove 44 Curved groove 45 Engaging projection

Claims (8)

In the leg device including a ball joint, the convex ball portion of the ball joint has an annular groove and a curved groove that intersects the annular groove at a plurality of positions of the annular groove, and the convex ball receiving portion of the ball joint is An engagement convex portion engageable with the annular groove and the curved groove, or
The convex joint receiving portion of the ball joint has an annular groove and a curved groove that intersects the annular groove at a plurality of positions of the annular groove, and the convex ball portion of the ball joint is formed on the annular groove and the curved groove. A leg device having an engaging convex portion that can be engaged.   The leg device according to claim 1, further comprising a rotation connecting portion that rotatably connects a head to the ball joint.   The leg device according to claim 1, wherein the curved groove is arranged in a radial direction from each intersecting position with the annular groove.   The leg according to claim 1 or 2, wherein a plurality of the engaging convex portions are arranged at positions where the engaging convex portions are engaged with one curved groove, and the annular grooves are arranged at positions where the engaging convex portions are engaged with each of the engaging convex portions. apparatus.   The first and second movable bodies that are movable in the direction of contact with and separating from the ball joint and the rotation connecting portion, and the lever bodies that individually move the movable bodies by operating in different directions. Item 3. The leg device according to item 1 or 2.   The leg device according to claim 1, further comprising a rotation assisting material between the convex ball portion and the convex ball receiving portion.   An elevating shaft that mounts the ball joint on the leg body so as to be movable up and down, and an operating body that moves the elevating shaft up and down and prohibits the operation of the elevating shaft at the elevating position. Item 3. The leg device according to item 1 or 2.   The leg device according to claim 2, wherein a camera is placed on the pan head.

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