JPH0113920Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial field of use: This invention is applicable to tripods such as still camera tripods, video camera tripods, cine camera tripods, astronomical telescope tripods, and survey instrument tripods. The present invention relates to improvements, particularly to a support device for adjusting the leg opening of these tripods.

BACKGROUND OF THE INVENTION As an example of a conventional tripod, a video camera tripod shown in FIG. 4 will be described as follows.

Center post 2 suspended and fixed to the underside of leg stand 1
Three opening/closing legs 4, 4', which have a support rod mounting ring 3 fitted therein so as to be able to slide vertically, and whose upper ends are pivotally connected to the leg base 1.
4", insert the rings 5, 5', 5", and pass the support rods 6, 6', 6" between the support rod mounting ring 3 and the rings 5, 5', 5" of each leg. When the opening/closing legs 4, 4', 4'' are expanded, the support rod mounting ring 3 fitted on the center post 2 is lowered, and when each opening/closing leg is closed, the support rod mounting ring 3 is raised. The support rod attachment ring was fixed at the desired position on the center post 2 by tightening the screw 7.However, for tripods without the center post 2, the above-mentioned device for adjusting and fixing the leg opening degree can be used as is. However, for example, there was a tripod opening adjustment fixing device without a center post, such as Utility Model Application Publication No. 4376 of 1930, but this tripod opening adjustment fixing device did not have a center post. The opening of each tripod is adjusted separately by loosening the thumbscrew, and the opening is fixed by tightening the thumbscrew. The operation for fixing the tripod while maintaining the same angle of opening was extremely complicated and required a long adjustment time.

Problems to be solved by the invention: This invention makes it possible to adjust the opening degree of the tripod and to securely support it in a type of tripod that does not have a center post or other posts protruding from the bottom of the leg base. Not only that, but only by screwing up and down the cap-like adjustment member, the opening and closing degrees of each leg can be automatically adjusted to the same angle, and each leg can be opened and closed at the same angle without any other operations. It is an object of the present invention to provide a tripod leg opening adjustment support device that can fixedly support a tripod while maintaining a desired equal angular leg opening.

[Structure of the idea]

Means for Solving the Problems...In order to achieve the above object, the present invention includes a pedestal, in which a ring is slidably fitted onto each of the opening/closing legs whose upper portions are pivotally connected, and a cap-shaped ring located below the pedestal is provided. The female threaded body is supported by threading the center screw hole of the female threaded body onto a screw rod hanging down from the center of the back side of the top surface of the adjustment member, and the upper part of the support rod whose lower part is pivotally connected to each of the rings is attached to the female threaded body. A tripod leg opening adjustment support device, characterized in that each support rod is configured to be able to be opened and closed together with the opening/closing legs by being pivotally connected to the leg, and the lower edge of the cap-shaped adjustment member and each support rod are configured to be in contact with each other. It has the following configuration.

Embodiment: To explain the embodiment shown in FIGS. 1 to 3, 11 is a footrest, 12 is a pan head mounted on the footstand, and 13 is a pan head operating lever.

Opening/closing legs 15, 15', 15'' are radially pivoted to bearing pieces 14 which protrude radially in three directions along the peripheral edge of the foot stand 11 by means of pins 16 (opening/closing legs 15' are not shown). 1 ring on each opening/closing leg 15, 15', 15''
7 is fitted in a vertically slidable manner, and the supporting rods 20, 20', 20',
Pivotally attach the lower part of the 20". [The support rod 20' is not shown.]
Reference numeral 21 denotes a cap-shaped adjustment member located directly below the footrest 11, and a screw rod 22 is formed hanging downward from the center of the back surface of the top portion 21b, and is lower than the lower surface 21d of the periphery 21c of the cap-shaped adjustment member 21. Make it stand out. The screw rod 22 is screwed into the screw hole 21e provided in the center of the female threaded body 21a to form the female threaded body 21.
I support a. The female threaded body 21a is provided with three pairs of bearing pieces 23, 23' that protrude radially in three directions, and the support rods 20, 23' are provided on the bearing pieces 23, 23'.
By inserting the ends of the support rods 20' and 20'' and pivoting them by the shaft 24, the support rods 20, 20' and 20'' can be opened and closed together with the opening/closing legs 15, 15' and 15''. 20, 20', 20'' are configured so as to be able to come into contact with the inner side b of the lower surface 21d of the peripheral edge 21c of the cap-shaped adjustment member 21.

Effect: If the screw rod 22 of the cap-shaped adjustment member 21 is screwed upward into the screw hole 21e of the female threaded body 21a, the expansion angle of the support rods 20, 20', 20'' becomes large, and therefore the opening/closing legs 15, 15 ', 15'' expansion angle also becomes large. Also, if the screw rod 22 is screwed down into the screw hole 21e of the female threaded body 21a, the support rods 20,2
The expansion angles of 0' and 20'' are small.Therefore, each support rod 20, 20', 20'' contacts the inner side b of the lower surface 21d of the peripheral edge 21c of the cap-shaped adjustment member 21, and the inner side serves as a stopper. The opening degree can be maintained and the opening/closing legs 15, 15', 15'' can also maintain the angle.

[Effect of idea]

As mentioned above, the present invention not only enables the opening of the tripod to be adjusted and fixedly supported in a type of tripod in which the center post and other posts do not protrude below the leg base, but also allows the cap-shaped adjustment member to be screwed up. By simply lowering the screws, the legs are automatically opened and closed at the same angle, and each leg is fixed at the desired equal angle without any other operations. There are effects that can be supported.

[Brief explanation of the drawing]

1 to 3 show examples of the present invention, and FIG. 1 is a partially cross-sectional view showing the state in which the tripod leg opening adjustment support device of the present invention is implemented on a video tripod. 2 is a bottom view of the cap-shaped adjustment member, FIG. 3 is a vertical sectional view of the cap-shaped adjustment member corresponding to FIG. 2-', and FIG. 4 is a perspective view of a conventional tripod for a video camera. It is a diagram. 11... Leg stand, 15, 15', 15''... Opening/closing leg, 20, 20', 20''... Support rod, 21... Cap-shaped adjustment member, 21a... Female threaded body, 22...
Spiral rod.

Claims (1)

[Scope of utility model registration request] A ring is slid onto each of the opening/closing legs whose upper portions are pivotally connected to the leg base, and a center screw of a female thread body is attached to a screw rod hanging from the center of the back side of the top surface of the cap-shaped adjustment member located below the leg base. The holes are screwed together to support the female threaded body, and the upper part of the support rod whose lower part is pivotally connected to each of the rings is pivotally connected to the female threaded body so that each support rod can be opened and closed together with the opening/closing legs, and the cap A tripod leg opening adjustment support device characterized in that the lower edge of the shape adjustment member and each support rod are configured to be in contact with each other.