| abstract |
The present invention relates to a device (1) for puncturing an object, in particular a bodily vein (V), comprising: - a body (2) defining an inner cavity (3) with at least one opening (31) and - a perforating needle (4) extending in said cavity (3) and being movable in said cavity between a resting position and an active position where the needle extends at least partially through said opening outside said cavity, and - actuating means (5) arranged to move said needle between the resting and active positions. The actuating means (5) comprises a tuneable multistable driving mechanism (51, 51a, 51b, 51c, 51d) comprising at least a multistable element (511, 512) having a determined switching load, said multistable element being fixedly arranged between said needle (4) and an inner wall of the cavity (3), and an actuator (52) for transmitting energy to move the needle between said resting and active positions when said energy reaches said switching load. |