Linear transmission device with capability of wireless power supply

A linear transmission device with capability of wireless power supply, comprising:

• a transmission mechanism, comprising:
• a long shaft part defining an axis;
• and
• a moving part disposed on the long shaft part in a manner that the moving part is movable along the axis;
• and
• a wireless power supply module, comprising:
• a magnet-providing part disposed on the long shaft part for providing a magnetic field, a direction of the magnetic field being parallel to the axis;
• and
• an induction coil disposed on the moving part, a normal vector of the induction coil being parallel to the direction of the magnetic field;
• wherein the moving part is a nut, the long shaft part is a screw shaft, the moving part comprises an end surface and a protruding portion, the protruding portion protrudes from the end surface, and the induction coil is disposed on a surface of the protruding portion;
• wherein the magnet-providing part is disposed at an end portion of the long shaft part, and the magnet-providing part comprises a coil surrounding the screw shaft;
• wherein when the moving part is moved along the axis, a current is induced in the induction coil through variation of the magnetic field.