A receiving part for receiving a rod for coupling the rod to a bone anchoring element, the receiving part is provided including a receiving part body (5) with a channel (13) for receiving the rod (6), and an accommodation space (19) for accommodating a head (3) of the bone anchoring element (1), the accommodation space (19) having an opening (18) for introduction of the head and a pressure element (8,8) located at least partly in the accommodation space (19), the pressure element having a flexible portion (83,83) to clamp the head wherein the pressure element (8,8) can assume in the receiving part body (5) an inserting position in which introduction of the head is permitted, a locking position in which the head is locked in the receiving part and a pre-locking position in which the head is clamped by the pre-stress exerted by the pressure element.本案提供一種容納桿件以聯結桿件至骨骼固定元件用之容納件,包含:容納件本體(5),有凹溝(13),以容納桿件(6);和包容空間(19),可包容骨骼固定元件(1)之頭部(3),此包容空間(19)具有開口(18),供引進頭部;以及壓力元件(8,8),至少部份位於包容空間(19)內,壓力元件有撓性部(83,83),以夾持頭部;其中壓力元件(8,8)可在容納件本體(5)內,設插入位置,容許引進頭部;鎖定位置,把頭部鎖定於容納件內;和預鎖定位置,頭部利用壓力元件所施預力夾持。3...螺釘頭5...容納件本體8...壓力元件9a,9b...銷15...陰螺紋17...第二斜縮部18...開口19...包容空間88...斜縮外表面部91a,91b...二直立彈性指桿M...對稱軸線
