| 摘要 |
A connection device for a fluid duct includes a metallic holding body, a sleeve-like insert body, and a synthetic resin retaining ring. The metallic holding body is formed with a socket having an inner periphery formed with an annular groove. The sleeve-like insert body has an outer periphery and is configured to be plugged into the socket. The synthetic resin retaining ring is fixed in the annular groove so that the retaining ring will bear axially against the holding body. At least one projection is provided on the outer periphery of the insert body for biting into the retaining ring upon insertion of the insert body into the socket.
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