A fluid dispensing device comprising: a body (1) and a dispensing head (2) having an administration opening (3) and being movable in an axial direction with respect to the body (1) when driven, ) Accommodates a reservoir (10) for storing a fluid, the reservoir (10) has a hollow tube (11), the proximal axial opening (12) of the hollow tube (11) is a stopper (20), the stopper (20) slides in the hollow tube (11) while keeping hermetically closed, the dispensing head (2) has a cylindrical hollow cannula (4) Wherein the cannula has a through end at one end thereof for connection to the administration opening and at the other end for a stopper therethrough, the penetration end at the opening, , Said stopper (20) being pierced by a cannula (4) during operation (6) of the cannula (4) has a peripheral edge (7) surrounding the opening (6) and having a distal end and a proximal end Wherein the distance in the axial direction between the ends defines the axial extent of the opening (6), and the reservoir (10) comprises two successive doses administered by driving the device The axial extent of the opening (6) of the penetrating end (5) being smaller than the axial thickness of the radial wall (22) of the stopper (20).BACKGROUND OF THE INVENTION流体投与装置であって、本体(1)と、投与開口(3)を有し駆動時には本体(1)に対して軸方向に移動可能な投与ヘッド(2)とを有し、前記本体(1)は流体を格納する貯留部(10)を収容し、当該貯留部(10)は中空管(11)を有し、当該中空管(11)の近接側軸方向開口(12)はストッパー(20)によって閉じられ、当該ストッパー(20)は駆動時に密閉状態を保ちつつ中空管(11)内をスライドし、前記投与ヘッド(2)は円筒形の中空カニューレ(4)を有し、当該カニューレ(4)はその一端において投与開口(3)に接続するとともに他端にストッパー(20)を貫通するための貫通端(5)を有し、貫通端(5)は開口(6)を有し、前記ストッパー(20)は駆動時にカニューレ(4)によって貫通される径方向壁部(22)を有し、前記カニューレ(4)の開口(6)は、当該開口(6)を取り囲み且つ遠位側端部と近接側端部を有する周縁部(7)を規定し、当該端部間の軸方向における距離は開口(6)の軸方向範囲を規定し、前記貯留部(10)は、連続する二度の当該装置の駆動により投与される二回分の量の流体を格納し、前記貫通端(5)の開口(6)の軸方向範囲は、ストッパー(20)の径方向壁部(22)の軸方向厚さより小さい、流体投与装置。【選択図】 図1
