PURPOSE: To obtain the magnetic field detecting element being small in size and having high efficiency by constituting this element so that conductor covering is further performed to the outside periphery of insulation covering in a coil formed by winding an insulating conductor round many times, external conductors consisting of this conductor covering come into contact with each other, and simultaneously, the external conductors in all of the insulating conductors are peeled off in a specific place on the periphery of the coil.
CONSTITUTION: A conductor 2 is wound round many times and forms a coil, and both ends of the coil are connected to a trimmer 3 and a trimmer 4. The trimmer 3 and the trimmer 4 are connected in series, and to the trimmer 4, a connector 5 is connected in parallel. Insulation of the conductor 2 and a shield 1 are held by an insulator. That is, the outside periphery of the conductor 2 is covered with the insulator, and its outside periphery is surrounded by the shield 1, as well. The conductor 2 of a gap part consists of an uninsulated structure, but even if the conductor 2 of the gap part and the outside periphery are surrounded by the insulator, this coil executes the same operation to an external magnetic field. When the gap exists in one part or more in the periphery of the coil, a high frequency magnetic field can be intrude into the coil.
| JP2008046014 | METAL DETECTOR |
| JP2000300530 | APPARATUS FOR MEASURING MAGNETIC FIELD IN LIVING BODY |
| JP2008304470 | MAGNETIC SENSOR |
SENDA MASAKATSU
MICHIGAMI OSAMU
