| 摘要 |
PURPOSE: A drug injection device is provided, which makes the emission quantity of the drug solution constant by applying uniform retraction force. CONSTITUTION: A drug injection device comprises a holding fixture(1), a fixing ring(2), an expansion and contraction board(3), and a hose connecting unit(4). The holding fixture is formed into a circular plate body shape and is formed of a plurality of fixing holes in an edge. The fixing ring has the same external diameter as the holding fixture and is formed of a plurality of fixing holes. The expansion and contraction board is fixed to the edge of holding fixture by a fixing ring. The hose connecting unit is connected to a hose.
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