Abstract: An apparatus for maintaining a cell suspension of a biomaterial for a bio 3D printer includes: a body detachably coupled to a syringe; a vent formed inside the body in a longitudinal direction of the syringe; a pipette fixture extending downward from the body and formed in a tapered shape whose outer diameter decreases downwardly; an air discharge port formed inside the pipette fixture, connected to the vent, and communicated into the syringe; a syringe fixing arm protruding from the body in a direction perpendicular to the longitudinal direction of the syringe to surround an upper flange of the syringe and fixed to the syringe; and a pipette coupled to the pipette fixture and having a hollow tapered shape whose inner diameter decreases downwardly and having a lower end positioned in an outlet of the syringe.

Abstract: A leakage prevention system for a downward spraying-type nebulizer for stacking a biomaterial of a bio-3D printer according to the present disclosure is provided, wherein the system constituting an output unit of the bio-3D printer includes: a nebulizer that downwardly sprays a biomaterial into a form of mist toward a substrate; a vacuum cap that is detachably installed on a upper portion of the nebulizer; a distributor that is connected to the vacuum cap with a hose; a vacuum generating module that is connected to the distributor with a hose; a compressor that generates an air pressure in the vacuum generating module; and a controller that is electrically connected to the vacuum generating module and the nebulizer, controlling an output pressure of the vacuum generating module and an action of the nebulizer.

Abstract: An apparatus for preventing photocuring of biomaterial in a discharge nozzle and in a dispenser of a bio 3D printer includes a driving unit for providing a driving force, a shutter member that receives the driving force from the driving unit and to move between a first position not covering the discharge nozzle and a second position covering at least the discharge nozzle in a reciprocating manner, and a control unit for controlling the discharge nozzle. The driving unit, the shutter member, the discharge nozzle, and the plurality of light sources constitute a head unit in an integrated manner. The head unit includes an end plane. The shutter member and a distal end of the discharge nozzle are positioned near a center of the end plane. The plurality of light sources are positioned on the end plane with the shutter member and the discharge nozzle therebetween.

Abstract: An apparatus for maintaining a cell suspension of a biomaterial for a bio 3D printer includes: a body detachably coupled to a syringe; a vent formed inside the body in a longitudinal direction of the syringe; a pipette fixture extending downward from the body and formed in a tapered shape whose outer diameter decreases downwardly; an air discharge port formed inside the pipette fixture, connected to the vent, and communicated into the syringe; a syringe fixing arm protruding from the body in a direction perpendicular to the longitudinal direction of the syringe to surround an upper flange of the syringe and fixed to the syringe; and a pipette coupled to the pipette fixture and having a hollow tapered shape whose inner diameter decreases downwardly and having a lower end positioned in an outlet of the syringe.