Patent Application
20070024054
The present invention is related to a tube connection structure, comprising a connector, a tubular sleeve, a coupling tube, and a washer wherein the coupling tube is provided with a multi-layered engagement portion having flat abutting faces disposed at both side surfaces thereon to be respectively connected with an abutment face of the tubular sleeve and a flat abutted surface of the washer thereby. Therefore, the coupling tube can be closely engaged with the tubular sleeve and the washer, and form a flat-type connecting joint therewith to provide a reinforced and securely tight tube connection structure thereby (especially when to seal off the water discharge under high pressure), efficiently avoiding any gaps and leaking produced therein to achieve better water-sealing and anti-leakage effect thereby.
Please refer to FIGS. 1 to 2 inclusive. A conventional tube connection structure includes a coupling tube 10 equipped with an arcuate portion 11 bent at the upper end thereof, a connector 20 with internal screw-threaded section 21 to be mounted to the coupling tube 10 thereof, and a tubular sleeve 30 with an oblique joining face 31 defining one end surface thereon accommodated at the coupling tube 10 therein, permitting a lower engaging face 32 disposed at the other side thereof to abut against the arcuate portion 11 of the coupling tube 10 thereof. A washer 40 having a set of upper and lower slant slopes 41, 42 disposed at both sides thereon is provided to accommodate to the interior of the connector 20, permitting the lower slant slope 42 to abut against the oblique joining face 31 of the tubular sleeve 30 thereon. A pipe 50 having an external screw-threaded section 51 defining thereon is mounted into the connector 20 with the internal screw-threaded section 21 securely locked to the external screw-threaded section 51 thereof.
There are some drawbacks to such conventional tube connection structure. First, the arcuate portion 11 of the coupling tube 10 is directly bent into a curvature and sequentially abutted against by the tubular sleeve 30 and the washer 40 mounted at the upper side thereon. In assembly, the external screw-threaded section 51 of the pipe 50 is secured tight into the internal screw-threaded section 21 of the connector 20, which can generate a down pressing force affecting the coupling tube 10 and cause the arcuate portion 11 there f to get deformed and damaged thereby. Second, the upper and lower slant slopes 41, 42 of the washer 40 are respectively tilted into an angle and can only partially and unevenly abut against the lower end edge of the pipe 50 and the oblique joining face 31 of the tubular sleeve 30, which, due to the smaller conjoining contact area thereof, tends to produce a number of gaps A therein and fails to efficiently seal off the water discharge and avoid the leakage of water thereof. Thus, the pipe 50 must be screwed up really hard to press tight against the slant slopes 41, 42 of the washer 10 so as to deform it to provide a flat-type abutment effect thereby, which is not only time-consuming and painfully troublesome, but can easily wear off and damage the washer 40 thereby.
It is, therefore, the primary purpose of the present invention to provide a tube connection structure, comprising a connector, a tubular sleeve, a coupling tube, and a washer wherein the coupling tube is provided with an engagement portion having a flat abutting face defining both side surfaces thereon to be respectively connected with an abutment face of the tubular sleeve and a plane abutted surface of the washer to provide a flat-type connecting joint and a reinforced and securely tight tube connection structure thereby (especially when to seal off the water discharge under high pressure), efficiently avoiding any gaps and leaking produced therein to achieve better water-sealing and anti-leakage effect thereby.
It is, therefore, the second purpose of the present invention to provide a tube connection structure wherein the engagement portion of the coupling tube is made in multi-layer with the flat abutting faces disposed at both sides to connect with the tubular sleeve and the washer respectively. Thus, when a pipe is tightly secured to the connector thereof with a down pressing and squeezing force generated therewith, the tubular sleeve mounted at the lower section of the engagement portion thereof can offer an appropriate buffering support so that the engagement portion thereof won't get twisted and deformed in application, ensuring a complete tight and sealed-off tube connection structure in case of high/lower water pressure to achieve the best assembly benefit thereof.
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Therefore, via the flat-type upper and lower abutting faces 82, 83 defining both sides of the engagement portion 81 of the coupling tube 80, the abutment face 73 of the tubular sleeve 70 and the abutted surface 93 of the washer 90 can be closely joined with both sides of the engagement portion 81 respectively and form a flat-type connecting joint therewith to provide a reinforced and securely tight tube connection structure thereby (especially when to seal off the water discharge under high water pressure). Besides, the lower end of the pipe 50 can also be flatly abutted against the pressed surface 92 of the washer 90 to avoid any spaces or gaps produced there-between that can cause the problems of water leakage or infiltration thereof. Meanwhile, when the pipe 50 is locked tight to the connector 60 with a down pressing or squeezing force generated therewith, the engagement portion 81 of the coupling tube 80 integrally molded in multiple layers and the tubular sleeve 70 mounted at the lower section thereof can offer appropriate buffering support to resist the pressure thereof so that the engagement portion 81 can refrain from getting twisted or deformed in application, efficiently achieving better water-sealing and anti-leakage effect and ensuring a completely tight tube connection structure in case of high/lower water pressure for the best assembly benefit thereof.
