目的 研究撞匙开锁工具在锁具上遗留的痕迹特征,为技术性开锁的检验鉴定提供新的技术参考。方法 使用林氏电动撞匙开锁工具、将军电动撞匙开锁工具、常用锁撞击快开工具套装三种撞匙开锁工具分别开启单、双排弹子锁各5把,通过蔡司立体显微镜V20观察并记录三种工具在锁具锁孔、锁芯匙槽、圆头弹子及平头弹子上形成的痕迹特征。结果 单排弹子锁:三种撞匙工具在锁孔处造成磨损;在锁芯匙槽内林氏电动撞匙开锁工具开锁发现明显痕迹,其余两种在内壁发现擦划痕迹;在随机圆头弹子球面均发现撞击痕迹和擦划痕迹;在随机平头弹子柱面均发现擦划痕迹。双排弹子锁:三种撞匙工具中只有将军电动撞匙开锁工具在弹子孔上造成磨损;在随机圆头弹子球面均发现撞击痕迹和条状擦划痕迹;在随机平头弹子柱面均发现擦划痕。结论 在弹子锁的检验鉴定中,若在单排弹子锁的锁孔处发现磨损、锁芯匙槽内壁发现擦划痕迹、圆头弹子球面发现不规则分布的撞击痕迹,或在双排弹子锁的圆头弹子球面发现不规则分布的撞击痕迹,那么不排除该锁具被撞匙工具开启过。

Objective To explore the characteristic marks left on the pin-tumbling lock from the bump-key lockpick/unlocking tool so as to provide technical reference for the inspection and identification of technical unlocking. Methods Three unlocking tools (Lin's/General's electric bump-key lockpick and common impacting quick unlocking kit) were respectively used to unlock five ones of single-/two- row-pin tumbling locks, with their resulted marks on the locks being observed under Zeiss stereomicroscope V20 onto the lock hole, plug slot, round-/flat-nosed pin. Results For single-row-pin tumbling lock, the wear and tear was left on the keyhole from all the three unlocking tools, with the obvious marks in the plug slot being from Lin's electric bump-key lockpick yet scratches on the inner wall from the other two unlocking tools. Struck and scratched marks were found on the spherical surface of stochastic round-nosed pins, so were the scratches on the cylindrical surface of stochastic flat-nosed pins. For two-row-pin tumbling lock, only the General's electric bump-key lockpick caused the wear and tear on the pinhole. On the spherical/cylindrical surface of the stochastic round-/flat-nosed pins, the same marks arose there as those of the single-row-pin tumbling lock. Conclusion For the pin-tumbling lock, suggestions would be of bump-key lockpick/unlocking tool likely poking into the lock if such marks occurred to a single-row-pin lock as the abrasion at the keyhole, scratches on the inner wall of the plug slot, and irregularly-scattering impacted signs on the spherical surface of round-nosed pins. For a two-row-pin lock, similar implication would be suggesting when marks were shown as the one identical to the last item indicated above about the single-row lock.