| 摘要 |
PURPOSE: A pipe connection structure is provided to increase pipe connection efficiency and to reduce production cost by simplifying the structure of the connecting portion of pipes. CONSTITUTION: A pipe connection structure comprises a connecting portion(11) formed at one end of a first pipe(10a). The connecting portion enables one end of a second pipe(10b) to be inserted into one end of the first pipe. The connecting end comprises a first and second stepped surfaces(12,13) and one or more rubber rings(21,22). The first stepped surface is formed at the inner circumference of the connecting portion with the same inner diameter as outer diameter of the second pipe. The second stepped surface is formed outside the first stepped surface with bigger inner diameter than that of the first stepped surface. The rubber ring is connected to leading end of outer circumference of one end of the second pipe. When one end of the second pipe is pushed into the first stepped surface, the rubber rings are located at the space(14) between the outer circumference of the second pipe and the second stepped surface to enable a tight connection.
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