| 摘要 |
PURPOSE:To ensure a sealing surface required by forming the inner diameter of a valve part smaller as a socket is proceeded to the rear side, and by forming the cross section of the valve part into rectangular shape protruded obliquely like a tongue to the center of a tube. CONSTITUTION:The inner diameter of a valve part 15 is made smaller as a socket 1 is proceeded to the rear side, and the cross section of the valve part is formed into almost rectangular shape protruded obliquely like a tongue to the center of a tube. When an inserting port 7 is inserted into the socket 1 for connection, at a time that a protrusion 8 on the front end outer periphery of the inserting port 7 passes the inner circumference of a rubber ring 3, the inner circumferential part of the valve part 15 is bent outside in the diametral direction as shown by a virtual line followed by a continuous line. The connection force can be smaller compared to in a case where the valve part of circular cross section is compressed. Connection can be facilitated while the sealing surface pressure required is ensured. |
