| 摘要 |
PCT No. PCT/IB97/00209 Sec. 371 Date Sep. 3, 1998 Sec. 102(e) Date Sep. 3, 1998 PCT Filed Mar. 7, 1997 PCT Pub. No. WO97/32524 PCT Pub. Date Sep. 12, 1997A biopsy needle device includes a stem slidably inserted into a cannula. Both the stem and the cannula are slidably supported by a box-shaped case. The box-shaped case houses a first movable assembly; a second movable assembly; a charging mechanism associated to the first and the second movable assemblies; an unlocking element; and an enabling element. The first movable assembly supports the cannula and is subject to a first spring. The second movable assembly supports the stem and is subject to a second spring. The charging mechanism is operable from outside the case in order to charge the first spring and the second spring at a charging phase, wherein the movable assemblies are engaged with the case by hooking mechanisms. The unlocking element releases the hooking mechanisms at an intermediate phase, wherein the second spring is discharged, and at a discharging phase, wherein the first and the second springs are both discharged. The enabling element is rotatably supported by the case for enabling axial movement of the unlocking element when the device switches in sequence between the charging phase, the intermediate phase, and the discharging phase.
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