The present invention relates to a valve structure (1) of a medical functional device (900), the valve structure (1) comprising a valve body (802) connected to a cap (801) that is separately made or manufactured ) And the valve body (802) comprises at least one element or spring element (823) which provides a prestress or bias of the valve body (802) in the cap (801).(Fig. 3h)本発明は、医療用機能デバイス(900)の弁構造体(1)に関し、弁構造体(1)が、別々に作製されるか又は製造されるキャップ(801)と連結された弁本体(802)を備え、弁本体(802)が、キャップ(801)内の弁本体(802)のプレストレス又はバイアスをもたらす、少なくとも1つの要素又はばね要素(823)を備える。【選択図】図3h