US 9,808,986 B2
Printing head assembly
Wei-De Toh, Singapore (SG); and Yi-Chin Tang, New Taipei (TW)
Assigned to ZYZprinting, Inc., New Taipei (TW); Kinpo Electronics, Inc., New Taipei (TW); and Cal-Comp Electronics & Communications Company Limited, New Taipei (TW)
Filed by XYZprinting, Inc., New Taipei (TW); Kinpo Electronics, Inc., New Taipei (TW); and Cal-Comp Electronics & Communications Company Limited, New Taipei (TW)
Filed on Jan. 22, 2015, as Appl. No. 14/602,292.
Claims priority of application No. 2014 1 0834954 (CN), filed on Dec. 29, 2014.
Prior Publication US 2016/0185042 A1, Jun. 30, 2016
Int. Cl. B29C 67/00 (2017.01); B29C 64/106 (2017.01); B29C 64/20 (2017.01); B33Y 30/00 (2015.01)
CPC B29C 64/106 (2017.08) [B29C 64/20 (2017.08); B33Y 30/00 (2014.12)] 13 Claims
OG exemplary drawing
 
1. A printing head assembly, adapted to drive at least two filaments to form on a base layer-by-layer to construct a three-dimensional object, the printing head assembly comprising:
a fixing member, having an inlet side and an outlet side opposite to each other;
at least two nozzle heads, respectively disposed at the outlet side of the fixing member, and each of the nozzle heads having a filament connection tube and a material extrusion port respectively penetrating through the fixing member, wherein the filament connection tube has a position-limiting portion;
at least two driving units, respectively disposed at the inlet side of the fixing member, and respectively driving the corresponding filament to feed into the material extrusion port of the corresponding nozzle head from the corresponding filament connection tube through the fixing member;
at least two position-limiting members, respectively disposed between the corresponding driving unit and the fixing member, and connected to the corresponding filament connection tubes; and
at least two position-restoring members, respectively disposed between the corresponding position-limiting member and the fixing member, and located on the corresponding filament connection tube, wherein each of the filament connection tubes respectively leans against the fixing member through the corresponding position-limiting portion or the corresponding position-limiting member, so as to limit the material extrusion port of each of the nozzle heads to move between a first height level and a second height level through the corresponding driving unit and the corresponding position-restoring member, each of the position-restoring members comprises a spring or an element which releases a position-restoring force to drive the corresponding nozzle head to move.