1. A safe syringe with a retractable needle tip containing a cylinder (1), a needle holder (2) installed in the mounting hole (11) of the cylinder head (1), as well as a central stem (3) with a snap-on design, characterized in that the outer side wall of the upper part of the needle holder (2) and at the top of the side wall of the mounting hole (11) of the cylinder (1), engagement of the locking shoulders is formed, by which the cylinder (1) and the needle holder (2) are aligned； a self-destructive locking plate (5) is installed at the bottom of the needle holder (2) to center and limit the needle holder (2)； and the head part of the central rod (2) is snapped-in to the upper end of the self-destructive locking plate (5) .2. A syringe according to claim 1, characterized in that a fixing recess (26) is made in the lower part of the needle holder (2) for installing a self-destructive locking plate (5) .3. A syringe according to any one of claims 1 or 2, characterized in that an internal longitudinal through hole (511) is made in the housing (51) of the self-destructing blocking plate (5), while the head of the housing (51) extends deep into the portion (24) for a sliding having a constant diameter and located in the lower part of the inner hole of the needle holder (2), and at the upper end of the head part of the housing (51) of the self-destructive locking plate (5) there is a protruding rim (512), which is made with the possibility of snap connection with the bulge (25) situated in the bottom portion (24) to slide, and to self-destruction removed from it by a certain distance； at the same time, at the bottom of the housing (51) of a self-destructive locking plate (5)1. Безопасный шприц с убирающимся наконечником иглы, содержащий цилиндр (1), иглодержатель (2), установленный в монтажном отверстии (11) головной части цилиндра (1), а также центральный шток (3) с защелкивающейся конструкцией, отличающийся тем, что у наружной боковой стенки верхней части иглодержателя
