| 摘要 |
The invention refers to an auto-injector (1) comprising:
- a body (2), a syringe (3) with a hollow injection needle (4) and a stopper (25), wherein the syringe (3) is slidably arranged with respect to the body (2),
- a torsion spring (11) capable of, upon activation:
- pushing the needle (4) from a covered position into an advanced position
- operating the syringe (3) to supply the dose of medicament (M), and
- activating means arranged to lock the spring means (11)
wherein the torsion spring (11) is grounded at one end (11.1) in the body (2) and at the other end (11.2) in a first gear member (13) rotatable about a longitudinal axis, wherein the first gear member (13), upon rotation, is arranged for translating a second gear member (16) toward the proximal end (P),
a ratchet wheel (12) is arranged on the first gear member (13), the ratchet wheel (12) having a number of circumferentially arranged teeth (12.1), wherein the activating means comprise at least one locking feature (15,10.2) for engaging the ratchet wheel (12) in a manner to prevent rotation and wherein the locking feature (15,10.2) is arranged to allow rotation on manual operation. |
