| 摘要 |
<p>An adjustable injection pen comprises a middle protection sleeve (5) and a medication core installation cylinder (9). A medication core (14) is arranged in an inner cavity of the medication core installation cylinder (9), and an installation cylinder outer sleeve (7) is arranged on an outer surface of the medication core installation cylinder (9). An outer protection sleeve (3) is arranged on an outer surface of the middle protection sleeve (5), and a dose display sleeve (10) is arranged between a bottom end of the middle protection sleeve (5) and the outer protection sleeve (3). A bottom end of the dose display sleeve (10) is connected with a knob (2), and a button (1) is arranged in a through hole of the knob (2). An inner protection sleeve (4) is sheathed in the middle protection sleeve (5), and a rack (6) is sheathed in the inner protection sleeve (4). A top end of the rack (6) contacts with a rubber plug (15) of the medication core (14), double gears (13) are arranged in rack teeth on an inner surface of the rack (6) and contact with a gear seat at a top end of a lock rod (11), and the other end of the lock rod (11) is connected with an inner end of the button (1). A friction block (12) is arranged between the rack (6) and the middle protection sleeve (5). By means of the adjustable injection pen, the injection dose is accurate, and both the usage and the carrying are convenient.</p> |
