| 摘要 |
<p>A cassette semi-automatic injection pen comprises a push rod sheath (3), a midbody (9), and a needle outer sheath (10) that are connected successively. A push rod hole sleeve (5) is connected at the bottom of the midbody (9). A hanging buckle (17) is disposed in the midbody (9). A through hole at the bottom of the push rod hole sleeve (5) is disposed with a button (4), and a button spring (18) is disposed between the button (4) and the hanging buckle (17). A bottling buckle body (15) is installed in an inner cavity of the midbody (9), and a spring (7) is disposed between a rib disposed on an external surface of the bottling buckle body (15) and the hanging buckle (17). At least two barbs are disposed at the bottom of the bottling buckle body (15). A movable rubber plug of a drug containing cassette bottle (8) sleeved in an inner cavity of the bottling buckle body (15) contacts a push rod (2). An exhaust needle sleeve (11) is installed in the periphery of a double-edge injection needle (14) installed at a bottle opening end of the drug containing cassette bottle. The accuracy and security of an injected dosage of the cassette semi-automatic injection pen are high.</p> |
