Intravenous catheter introducing device

An intravenous catheter introducing device comprising:

• a barrel having front and rear open ends opposite to each other in a longitudinal direction, and a surrounding barrel wall which interconnects said front and rear open ends, said surrounding barrel wall including front and rear wall portions which are disposed proximate to said front and rear open ends, respectively, said rear wall portion having an inner barrel wall surface which surrounds an axis in the longitudinal direction and which defines a passage, and an outer barrel wall surface opposite to said inner barrel wall surface in radial directions relative to the axis, said inner barrel wall surface having a slotted path which extends through said outer barrel wall surface, which extends along the longitudinal direction, and which has starting and ending regions that are opposite to each other, and that are respectively distal from and proximate to said rear open end, said inner barrel wall surface further having a docking port which extends through said outer barrel wall surface, and which extends in a first transverse direction to be communicated with said starting region so as to form a docking shoulder that faces towards said front open end;
• a needle cannula having a front segment terminating at a tip end, and a rear connecting end opposite to said front segment along the axis;
• a needle hub including a front holding portion which is surrounded by said front wall portion and which holds said rear connecting end of said needle cannula, and a rear shell portion which is disposed opposite to said front holding portion along the axis to be inserted into said passage such that said needle hub is slidable relative to said surrounding barrel wall along the axis between a position of use, where said front segment of said needle cannula extends forwardly of said front open end, and a disposal position, where said front segment of said needle cannula is retracted into said passage, said needle hub further including an intermediate viewing-window portion which is interposed between said front holding portion and said rear shell portion;
• a biasing member which is interposed between said rear shell portion and said inner barrel wall surface to bias said needle hub towards the disposal position;
• an engaging peg which is configured to be anchored on said docking shoulder against the biasing action of said biasing member in the position of use, and which extends from said rear shell portion radially so as to be externally manipulated to move from said docking shoulder to said starting region, said engaging peg being dimensioned to be slidable along said slotted path to said ending region so as to move said needle hub to the disposal position;
• a receptacle frame which is disposed on said outer barrel wall surface, said receptacle frame including front and rear guiding grooves which are spaced apart from each other in the longitudinal direction, and which cooperate with each other to define a guideway that extends over said docking port and said starting region in the first transverse direction;
• an actuating unit including
• a guided body which has first and second guided sides that are guided respectively in said front and rear guiding grooves when said actuating unit is moved along said guideway between normal and actuating positions, and
• a pushing body which is configured such that, when said guided body is in the normal position, said pushing body is distant from said engaging peg, and when said guided body is in the actuating position, said pushing body shoves said engaging peg to said starting region;
• and
• a stabilizing unit which is disposed between said guided body and said engaging peg, and which is configured such that said engaging peg is kept moving with said guided body until said engaging peg reaches said starting region, thereby ensuring steady movement of said engaging peg between said docking shoulder and said starting region.