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US 2019/0101239 A1Published application
Anti-rotation structure, a tube structure and a photographic support
AssigneeGuangdong Sirui Optical Co., Ltd.
InventorsJie Li, Xiaoyun Hu
Life of this patent
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Abstract
An anti-rotation structure, a tube structure, or photographic support with the anti-rotation structure comprises a first tube including a first groove or a first rib axially thereof. A second tube fitting to the first tube having an exterior thereof comprises a corresponding second rib second groove to the first groove or the first rib. When the first tube moving relative to the second tube, the first rib or the second rib moves along the corresponding second groove or the first groove. The groove defines the movement of the rib when the first tube moves relative to the second tube to effectively ensure the movement between the first tube and the second tube in a linear or straight line direction.
Claims21
1-10. (canceled)
11:
- An anti-rotation structure for a photographic equipment comprising:
- an end cap comprising:
- an end plate with an opening disposed at its center;
- a side wall connecting with the end plate along the circumference of the end plate;
- wherein the side wall comprises at least one slit extending axially;
- and
- wherein the at least one slit corresponds in size to a rib disposed at an interior surface of a first tube of a leg of the photographic equipment such that the rib moves along the at least one slit.
4 more elements
12:
- The anti-rotation structure of claim 11, wherein the end cap is disposed at a distal end of a second tube of the leg of the photographic equipment.
13:
- The anti-rotation structure of claim 11, wherein the end cap further comprising a protrusion on the side wall, wherein the protrusion matches to a tube opening on the second tube.
14:
- The anti-rotation structure of claim 11, wherein the end cap further comprising an opening on the side wall, wherein the opening matches to a tube protrusion on the second tube.
15:
- The anti-rotation structure of claim 11, wherein the at least one slit extends to the end plate with a cut.
16:
- An anti-rotation structure for a photographic equipment comprising:
- an end cap comprising:
- an end plate with an opening disposed at its center;
- a side wall connecting with the end plate along the circumference of the end plate;
- wherein the side wall comprises at least one rib extending axially;
- and
- wherein the at least one rib corresponds in size to a groove disposed at an interior surface of a first tube of a leg of the photographic equipment such that the at least one rib moves along the groove in a straight line.
4 more elements
17:
- The anti-rotation structure of claim 16, wherein the end cap is disposed at a distal end of a second tube of the leg of the photographic equipment.
18:
- The anti-rotation structure of claim 16, wherein the end cap further comprising a protrusion on the side wall, wherein the protrusion matches to a tube opening on the second tube.
19:
- The anti-rotation structure of claim 16, wherein the end cap further comprising an opening on the side wall, wherein the opening matches to a tube protrusion on the second tube.
20:
- The anti-rotation structure of claim 16, wherein the at least one rib extends to the end plate with a cut.
21:
- A leg of a photographic support structure comprising:
- a first tube including a first defining structure disposed axially on its interior surface;
- a second tube fitting to the first tube, wherein an exterior surface of the second tube comprises a second defining structure, extending axially, to the first defining structure;
- an anti-rotation structure disposed at a distal end of the second tube;
- wherein the anti-rotation structure comprising:
- an end plate with an opening disposed at its center;
- a side wall connecting with the end plate along the circumference of the end plate;
- wherein the side wall comprises a corresponding structure for receiving the second defining structure extending axially along the side wall;
- and
- wherein the first tube moves relative to the second tube along the corresponding structure and the first defining structure.
7 more elements
22:
- The leg of the photographic support structure of claim 21, further comprising a tightening element for connecting the first tube and the second tube, wherein the tightening element comprises an inner adapter with threads on a portion of its exterior surface disposed on an exterior surface of the first tube;
- and an outer adapter connecting to the inner adapter via the threads of the inner adapter.
23:
- The leg of the photographic support structure of claim 22, wherein the inner adapter comprises a substantially cone shape.
24:
- The leg of the photographic support structure of claim 23, wherein a narrower circumference of the inner adapter is positioned toward the anti-rotation structure.
25:
- The leg of the photographic support structure of claim 22, further comprising a locking ring disposed on the outer adapter, wherein the locking ring prevents the anti-rotation structure separating from the second tube when the anti-rotation structure moves to a position of the locking ring.
26:
- The leg of the photographic support structure of claim 21, wherein the corresponding structure extends to the end plate with a cut.
27:
- The leg of the photographic support structure of claim 21, wherein the first defining structure comprises a first rib and the second defining structure comprises a first groove matching the first rib.
28:
- The leg of the photographic support structure of claim 21, wherein the first defining structure comprises a second groove and the second defining structure comprises a second rib matching the second groove.
29:
- The leg of the photographic support structure of claim 21, wherein the anti-rotation structure further comprising a protrusion on the side wall, wherein the protrusion matches to a tube opening on the second tube.
30:
- The leg of the photographic support structure of claim 21, wherein the anti-rotation structure further comprising an opening on the side wall, wherein the opening matches to a tube protrusion on the second tube.