PROBLEM TO BE SOLVED: To provide a syringe pump capable of delivering liquid medicament, with a syringe pusher correctly held by a holding member by preventing a gear of the holding member from deviating in a thrust direction with respect to a gear in a power side.SOLUTION: A holding mechanism 80 of the syringe pump includes: a first holding member 81 and a second holding member 82 disposed at both sides of a syringe pusher a first gear 151 corresponding to the first holding member 81 a second gear 152 corresponding to the second holding member 82 a third gear 153 engaged with the first gear 151 to transmit power to the first holding member 81 a fourth gear 154 that is interposed between the second gear 152 and the third gear 153 to transmit the power of the third gear 153 to the second gear 152 and a first elastic member 171 energizing the first gear 151 in a thrust direction (an X direction). The third gear 153 includes a locking part 161 that regulates movement of the first gear 151 in the thrust direction (an X1 direction) against energizing force received by the first elastic member 171.SELECTED DRAWING: Figure 10COPYRIGHT: (C)2017,JPO&INPIT【課題】把持部材のギヤが、動力側のギヤに対してスラスト方向にずれるのを防止して、把持部材がシリンジ押子を正しく把持して、薬剤の送液を行うことができるシリンジポンプを提供する。【解決手段】シリンジポンプの把持機構部80は、シリンジ押子を間に配置させる、第1把持部材81及び第2把持部材82と、第1把持部材81に対応する第1ギヤ151と、第2把持部材82に対応する第2ギヤ152と、第1ギヤ151と噛み合って、第1把持部材81に動力を伝達する第3ギヤ153と、第2ギヤ152と第3ギヤ153の間に介在して、第3ギヤ153の動力を第2ギヤ152に伝達する第4ギヤ154と、第1ギヤ151をスラスト方向(X方向)に付勢する第1弾性部材171を有し、この第3ギヤ153は、第1ギヤ151が第1弾性部材171により受ける付勢力に抗してスラスト方向(X1方向)に移動することを規制する係止部161を有する。【選択図】図10
