| 摘要 |
A trocar (1) has a housing (8). A puncture needle (5) is connected to a tip part (82) of the housing (8). An insertion hole (6) penetrates through the housing (8) and the puncture needle (5). A power transmission coil (4) is arranged coaxially with the insertion hole (6) on the periphery of the insertion hole (6) in a main body (81) of the housing (8). A cylindrical magnetic body (7) is arranged coaxially with the insertion hole (6) on the periphery of the insertion hole (6) in the tip part (82). A rigid insertion part (21) of a treatment instrument (2) is inserted in the insertion hole (6). A power receiving coil (22) is arranged along the entire length of the insertion part (21). The power transmission coil (4) and the power receiving coil (22) are inductively coupled. Therefore, when an alternating current is supplied to the power transmission coil (4), electric power can be extracted from the power receiving coil (22). Through this configuration, electric power can be wirelessly fed to the treatment instrument (2). Arranging the magnetic body (7) as described above enhances the efficiency of power feeding. |
