Coil module

A coil module, comprising:

• a second coil mechanism, configured to correspond a first coil mechanism, wherein the second coil mechanism comprises:
• a third coil assembly;
• a base, configured to support the third coil assembly, wherein the second mechanism further comprises a second virtual plane configured to correspond to and face a first virtual plane of the first coil mechanism, the first virtual plane is parallel to the second virtual plane, and the first virtual plane and the second virtual plane are perpendicular to a normal direction;
• and
• a fourth coil assembly, wherein the fourth coil assembly is electrically independent from the third coil assembly and comprises:
• a fourth main body;
• and
• a fourth coil assembly lead, traversing at least a portion of the fourth main body, wherein the fourth main body has a surface facing the fourth coil assembly lead and the third coil assembly.