Telescopic tube locking structure
AssigneeFoshan Nanhai Chevan Optical Electronics Co., Ltd.
InventorLihwa Lee
Life of this patent
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Abstract
A telescopic tube locking structure includes a telescopic tube including at least a upper tubular part and a lower tubular part; an eccentric camshaft having a lower portion fixed in the lower tubular part and a upper portion being inserted into the upper tubular part, and, an opening cam having a larger diameter than the upper portion of the eccentric camshaft is rotationally mounted on the eccentric shaft and is inserted in and engaged with the upper tubular part in a rotationally fixed manner such that the opening cam is axially movable along with the an eccentric camshaft in the upper tubular part and is rotationally fixed with the upper tubular part; wherein a central line of the opening cam is offset from a central line of the upper portion of the eccentric camshaft.
Claims18
A telescopic tube locking structure comprising:
- a telescopic tube comprising at least an upper tubular part and a lower tubular part;
- an eccentric camshaft having a lower portion fixed in the lower tubular part and an upper portion being inserted into the upper tubular part;
- an opening cam having a larger diameter than the upper portion of the eccentric camshaft rotationally mounted on the eccentric camshaft and inserted in and engaged with the upper tubular part in a rotationally fixed manner such that the opening cam is axially movable along with the eccentric camshaft in the upper tubular part and is rotationally fixed with the upper tubular part;
- and
- a lock ring, wherein the upper portion of the lock ring is connected with the upper tubular part of the telescopic tube, the lower portion of the lock ring is gathered inwards to form a gathering part jointed with the external wall of the lower tubular part of the telescopic tube, and the external diameter of the upper portion of the eccentric camshaft is larger than that of the lower tubular part of the telescopic tube;
- wherein a central line of the opening cam is offset from a central line of the upper portion of the eccentric camshaft.
(canceled)
A telescopic tube locking structure comprising:
- a telescopic tube comprising at least an upper tubular part and a lower tubular part;
- an eccentric camshaft having a lower portion fixed in the lower tubular part and an upper portion being inserted into the upper tubular part;
- an opening cam having a larger diameter than the upper portion of the eccentric camshaft rotationally mounted on the eccentric camshaft and inserted in and engaged with the upper tubular part in a rotationally fixed manner such that the opening cam is axially movable along with the eccentric camshaft in the upper tubular part and is rotationally fixed with the upper tubular part;
- and
- a lock ring between the upper and lower tubular parts;
- wherein the external diameter of the upper portion of the eccentric camshaft is larger than that of the lower tubular part of the telescopic tube;
- and
- wherein a central line of the opening cam is offset from a central line of the upper portion of the eccentric camshaft.
A telescopic tube locking structure comprising:
- a telescopic tube comprising at least an upper tubular part and a lower tubular part;
- an eccentric camshaft having a lower portion fixed in the lower tubular part and an upper portion being inserted into the upper tubular part;
- an opening cam having a larger diameter than the upper portion of the eccentric camshaft rotationally mounted on the eccentric camshaft and inserted in and engaged with the upper tubular part in a rotationally fixed manner such that the opening cam is axially movable along with the eccentric camshaft in the upper tubular part and is rotationally fixed with the upper tubular part;
- and
- a lock ring between the upper and lower tubular parts, wherein an upper portion of the lock ring and the upper tubular part of the telescopic tube are in threaded connection;
- wherein a central line of the opening cam is offset from a central line of the upper portion of the eccentric camshaft.
Dependencies are inferred from the claim text.