Being the rhabdome where diameter differs, catching the rhabdome securely position without slipping, it offers the rhabdome fixture equipped support which can lock the support. Retractable support with the axial core of 8 and the said support and the rhabdome fixture which because support 8 is locked in the rhabdome 14 which is crossed is provided on one end side of support 8 it has, the said rhabdome fixture, the receiving stopping section has with regulation section 9A and 10A which regulate 15 which the occasion where the support was made to expand catches the stretching power from of support 8 with axial core direction and the aforementioned axial core Z and the movement of the rhabdome to the direction which almost crosses, replaces to the aforementioned rhabdome 14 and in order that compared to be able to lock the support in small diameter rhabdome 2 of small diameter, receives, stopping section 15The concave groove 17 which small diameter rhabdome 2 can enter directing to support side, concave facilities it is done, receives the center of cross direction of the said concave groove and 17, position it has done to slip in outer part direction of support 8 vis-a-vis the axial core X1 of the rhabdome 2 which was caught in stopping section 15.
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