Fluid jet device, drive device of fluid jet device, surgical instrument, and method of driving fluid jet device

A fluid jet device comprising:

• a fluid chamber with a variable capacity;
• an entrance channel communicated with the fluid chamber;
• an exit channel communicated with the fluid chamber;
• a capacity varying section adapted to vary the capacity of the fluid chamber in response to supply of a drive signal;
• an opening section communicated with the exit channel;
• a pressure generation section adapted to supply the entrance channel with a fluid;
• and
• a drive signal supply section adapted to supply the capacity varying section with a drive signal including a compressing drive waveform section making the capacity varying section operate so as to compress the capacity of the fluid chamber and a restoring drive waveform section making the capacity varying section operate so as to restore the capacity of the fluid chamber before compressing the capacity in a signal waveform of one cycle;
• and
• a storage section adapted to store waveform information of the drive signal;
• wherein the drive signal supply section controls supply content of the drive signal so as to provide a restoring period adapted to restore a steady state of the fluid flowing toward an inside of the fluid chamber in a period from when the compressing drive waveform section in the drive signal is supplied to the capacity varying section to when a subsequent one of the compressing drive waveform section is supplied to the capacity varying section, and
• the drive signal supply section generates the drive signal based on the waveform information stored in the storage section, and supplies the capacity varying section with the drive signal.