PROBLEM TO BE SOLVED: To provide a new syringe type two-medicines mixing ejection device capable of mixing two medicines by easy operation and ejecting the mixed contents by a series of operation.SOLUTION: A syringe type two-medicines mixing ejection device 10 includes a first piston 30 and a plunger P disposed inside a syringe 20 to form two filling spaces R1, R2. The inner peripheral surface of the forward end side syringe is provided with a recessed part 25 for forming a by-path 60 in a space up to the piston 30. The plunger P includes a holding member 41 and an operating member 50, and the holding member 41 has a shaft 44 and a plurality of arms 45. The free ends 45b of the arms 45 are each provided with a pressure receiving surface 48a for restraining the movement by pushing in the operating member 50. The arms 45 are each provided with an elastic tongue piece 46 entering from an opening A2 of the syringe rear end to cause bending deformation and a locking projection 47 locked on a syringe rear end 20e. The operating member 50 is assembled to be slidable through the shaft 44, and the restraint on the arms 45 and locking of the locking projection 47 are released by releasing push-in of the operating member.COPYRIGHT: (C)2014,JPO&INPIT【課題】容易な操作で二剤混合でき、その混合された内容物を一連の動作で噴出できる、新規なシリンジ型二剤混合噴出器を提供する。【解決手段】シリンジ型二剤混合噴出器10は、シリンジ20の内側に第1のピストン30とともにプランジャPを配置して2つの充填空間R1,R2を形成し、先端側シリンジ内周面に、ピストン30との間にバイパス60を形成する凹部25を設ける。プランジャPは、保持部材41と操作部材50を有し、保持部材41は、シャフト44と、複数のアーム45を有し、アーム自由端45bに、操作部材50の押し込みにより、その動きを拘束する受圧面48aを形成するとともに、アーム45に、シリンジ後端開口部A2から進入して撓み変形を生じる弾性舌片46と、シリンジ後端20eに係止される係止突起47を設ける。操作部材50は、シャフト44を通してスライド可能に組み付けられ、その押し込みの解除によりアーム45の拘束とともに係止突起46の係止を解除する。【選択図】図4
