| 摘要 |
A plug connection device (1), in particular for securing and tightening fluid couplings (11), has a holding device with a holder (14), a plug-in element (26) and an extension spring element in the form of an annular extension spring (23). The annular extension spring (23) acts as a wedge between an annular surface (32) formed on the plug-in element (26) and an annular rim (19) formed on the holder (14). The annular extension spring (23) can perform a rolling movement around its chord center axis (24). A particularly low static friction is present here because of the support of the annular extension spring (23) on the annular rim (19), which permits a continuous automatic re-tightening of the holding device (12).
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