PROBLEM TO BE SOLVED: To reduce a size of a dental syringe.SOLUTION: When a valve member 110 and a movement/retreat member 500 are projected toward one direction 2A (when the valve member 110 and the movement/retreat member 500 are projected toward a virtual plane H orthogonal to the one direction 2A), a part of the valve member 110 is positioned outside of an outer peripheral part 500E of the movement/retreat member 500. Therefore, it is possible to operate the valve member 110 without using the movement/retreat member 500. In addition, in the case, a member for transmitting an operation force from the movement/retreat member 500 to the valve member 110 is not required, for reducing size of a dental syringe 1.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2019,JPO&INPIT【課題】歯科用シリンジの小型化を図る。【解決手段】一方向2Aに向けて弁部材110および進退部材500を投影した場合に(一方向2Aと直交する仮想平面Hに対して弁部材110および進退部材500を投影した場合に)、弁部材110の一部が、進退部材500の外周部500Eよりも外側に位置する。これにより、進退部材500を介さずに弁部材110を操作できるようになる。また、この場合、進退部材500から弁部材110へ操作力を伝えるための部材を設けずにすみ、歯科用シリンジ1の小型化を図れる。【選択図】図6
