| 摘要 |
A syringe holder 210 comprises a syringe housing 212, an actuator and first and second drive elements 232 270. The syringe housing 212 includes means for extending and retracting the syringe 214. When the syringe is in the extended position its needle 218 will be outside the syringe housing 212. The actuator acts on the first drive element 232 through a flexible arm 233. The first drive element 232 acts on the second drive element 270 and through it on the syringe 214. When the actuator is pressed, the syringe moves to the extended position and then discharges its contents. The second driving element 270 includes a stop, that causes the flexible arm 233 and hence the first driving element 232 to disengage from the second driving element 270 when the syringe 214 is discharged. This disengagement between the first and second driving elements 232 270 then allows a biasing spring 226 to return the syringe 214 to its retracted position. (62) Divided Out of 551849
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