| 摘要 |
The injection device comprises a casing containing an active substance reservoir, a cannula communicating with the reservoir, means for inserting the cannula and pump means for discharging the reservoir contents through the cannula, wherein the cannula 11 is fixed relatively to the casing and projects beyond the underside of the casing to the depth required for injection, and is surrounded by a protective element 5,24 which is moved by a spring drive from one end position in which it projects beyond the underside of the casing sufficiently to project beyond the cannula into the other end position in which it does not project beyond the underside of the casing. >
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