A support assembly comprising: a support housing (10) adapted to receive a sample collection tube within a rear end (11), including a front end (12) of the support housing a receiving port (15) needle to receive a needle cannula (20) in it； and a security protection (50) pivotally attached to a collar (30), said collar having an opening therethrough to receive a needle cannula therethrough, where the security protection is capable of being pivoted on at least a portion of a needle received inside the needle receiving port (15) of the support housing, characterized in that the collar (30) is received within a recess (17) between an annular skirt (18) extending around the needle receiving port (15) and the needle receiving port (15) of the holder housing (10), such that the safety guard (50) and the collar (30) can be rotated around a longitudinal axis of the housing (10) of the support without accidentally disconnecting the collar (30) from the housing (10) of the support, wherein an outer surface of the collar (30) includes a protuberance (40) and an inner surface of the annular skirt includes a ranu ra (19), the groove being on the annular skirt adapted to receive the protuberance on the annular collar (30), thus providing an interface adjustment when the collar is received between the annular skirt (18) and the port (15) of needle reception of the support housing.Un conjunto de soporte que comprende: un alojamiento (10) del soporte adaptado para recibir un tubo de recogida de muestras dentro de una extremidad (11) posterior, incluyendo una extremidad (12) delantera del alojamiento del soporte un puerto (15) de recepción de aguja para recibir una cánula (20) de aguja en él； y una protección (50) de seguridad unida de manera pivotante a un collarín (30), teniendo dicho collarín una abertura a su través para recibir una cánula de aguja a su través, en donde la protección de seguridad es capaz de ser hecha pivotar sobre al menos una porción de una aguja recibida dentr
