Abstract: A syringe includes a needle support received in a front portion of a housing and having a front tube for attaching a needle. A plunger includes a piston slidably received in the housing and a stem detachably secured to the piston. The piston may be secured to the needle support for pulling the needle into the housing after use. The needle support has one or more bulges for engaging with juts of the housing for limiting the needle support to rotate relative to the housing. The piston includes a rod and a pole for adequately forcing medicine out of the needle support.

Abstract: A syringe includes a nozzle received in a front portion of a barrel, a needle attached to the nozzle, a stem having a piston slidably received in the barrel and movable toward and away from the nozzle. The piston has a latch for latching to the nozzle and to move the nozzle and the needle inward of the barrel after use. One or more coupling members are coupled between the stem and the piston for allowing the stem to be bent and disengaged from the piston. The piston includes one or more catches for retaining the piston in the barrel after the piston is moved inward of the barrel.

Abstract: A syringe includes a nozzle received in a front portion of a barrel, a needle attached to the nozzle, a stem having a piston slidably received in the barrel and movable toward and away from the nozzle. The piston has a latch for latching to the nozzle and to move the nozzle and the needle inward of the barrel after use. One or more coupling members are coupled between the stem and the piston for allowing the stem to be bent and disengaged from the piston. The piston includes one or more catches for retaining the piston in the barrel after the piston is moved inward of the barrel.