Patent ID: 7467753

Claim:
A connecting tube structure comprising: a connecting tube, screw nuts, check valves, and a rotary water-sealing device wherein the connecting tube has both ends respectively coupled with one screw nut, and one end attached to a faucet with a threaded tube defined by outer screw threads extending at the bottom thereon while the other end mounted to a shower head equipped with an outer-threaded section; the connecting tube has a stop plate disposed at one end, and the stop plate is also inserted to a grooved seat extending at a top of the rotary water-sealing device thereon; the rotary water-sealing device includes an upper section defined by at least one ringed groove with a watertight O-ring adapted thereto to abut tight against an internal surface of the shower head for water-sealing purpose thereby; the rotary water-sealing device also has a lower section defined by an indentation with a V-shaped outward-expanding plastic side wall extending thereon to abut against an internal surface of the screw nut secured to the outer-threaded section defining a lower section of the shower head for water-sealing purpose as well; wherein each watertight O-ring abutting against the internal surface of the shower head to achieve internal water-sealing purpose, and the V-shaped plastic side wall as well as an O-shaped ring clamped between the shower head and the screw nut secured to the outer-threaded section of the shower head also provide external water-sealing effect, achieving double water shutoff benefits thereby; thus, the connecting tube is rotatable in 360 degrees with high-and-lower pressure water-sealing benefit to avoid the risk of getting twisted and tied up, and to ensure smooth transport of water supply thereby.