EXTERNAL MAGNETIC FORCE SHIELDING DEVICE OF AN ELECTRONIC METER, CAPABLE OF PREVENTING VARIATIONS IN MAGNETIC FORCE OF A MEASURING PERMANENT MAGNET CAUSED BY AN EXTERNAL MAGNETIC FORCE

摘要

PURPOSE: An external magnetic force shielding device of an electronic meter is provided to prevent unnecessary and illegal magnetic force from the outside of a meter which transmits to a permanent magnet, thereby preventing variations in magnetic force of the measuring permanent magnet caused by external magnetic forces and disturbances.;CONSTITUTION: An external magnetic force shielding device of an electronic meter comprises a cover structure(240). The cover structure covers an open top of an internal housing arranged such that an impeller can rotate. The cover structure comprises a magnet arrangement unit in which a permanent magnet is arranged. An insertion groove is formed on a top surface of the cover structure. A magnetic force sensing sensor and the permanent magnet are protected by the cover structure from a magnetic force. A cable being electrically connected to the magnetic force sensing sensor comprises an external magnetic force shielding unit. A withdrawing hole is formed in the external magnetic force shielding unit.;COPYRIGHT KIPO 2013