| 摘要 |
<p>The device comprises a syringe housing (1), a syringe support (2) and a spring-loaded propulsion mechanism (3), which allows a relative movement between the housing (1) and the syringe support (2). The front portion of the housing (1) is provided with a connection piece (5), and the support (2) is linked with a doser (4) which restricts the syringe piston movement. Furthermore, the doser (4) comprises a threaded socket (6) firmly linked with the support (2), a threaded rod (7) rotating in the sleeve, an asymmetrical thrust plate (8) firmly connected to an end of the rod (7), and a counting system provided with a spring which by the click of this spring gives acoustic indication of the rotation of the rod (7).</p> |
