Patent ID: 7750783

Claim:
An electronic instrument comprising: a coil unit, the coil unit comprising: a planar coil; a magnetic member that increases an inductance of the planar coil; a magnetic flux leakage prevention member that absorbs a magnetic flux leaking from the magnetic member; heat sink; a printed circuit board having conductive patterns, the heat sink being provided on the printed circuit board and the conductive patterns being connected to the planar coil formed on the printed circuit board; and at least one mounted component provided on the printed circuit board on a side that is provided with the heat sink, an upper side position of the planar coil being set to be higher than an upper side of a mounted component having a maximum height among the at least one mounted component, the magnetic member being provided between the planer coil and the magnetic flux leakage prevention member, the magnetic flux leakage prevention member being provided between the magnetic member and the heat sink, and the magnetic flux leakage prevention member being electrically insulated from the heat sink; and a casing that receives the coil unit, the casing having a hole in a surface that faces the planar coil, the hole being covered with a protective cover; the casing having a reinforcing section that is formed at a position that faces a maximum height position of the at least one mounted component, the reinforcing section having a thickness larger than that of the protective cover; and when a height of an outer surface of the protective cover from the printed circuit board is referred to as H 1 , a maximum height of at least one mounted component with respect to the printed circuit board is referred to as H 2 , and a thickness of the reinforcing section is referred to as H 3 , H 1 >H 2 +H 3 being satisfied.