US 12,191,689 B2
Portable device, charging system, and power source circuit substrate
Takezo Hatanaka, Ibaraki (JP); and Hisashi Tsuda, Ibaraki (JP)
Assigned to K/S HIMPP, Lynge (DK)
Filed by K/S HIMPP, Lynge (DK)
Filed on Jun. 14, 2021, as Appl. No. 17/347,277.
Application 17/347,277 is a continuation of application No. 16/169,342, filed on Oct. 24, 2018, granted, now 11,056,920.
Application 16/169,342 is a continuation of application No. 14/422,233, granted, now 10,218,223, issued on Feb. 26, 2019, previously published as PCT/JP2014/064335, filed on May 29, 2014.
Claims priority of application No. 2013-183130 (JP), filed on Sep. 4, 2013; application No. 2013-218842 (JP), filed on Oct. 22, 2013; and application No. 2014-083538 (JP), filed on Apr. 15, 2014.
Prior Publication US 2021/0313837 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); H02J 7/04 (2006.01); H02J 50/12 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC H02J 7/0042 (2013.01) [H02J 7/0044 (2013.01); H02J 7/04 (2013.01); H02J 50/12 (2016.02); H02J 50/80 (2016.02); H02J 50/90 (2016.02)] 5 Claims
OG exemplary drawing
 
1. A charging system for a hearing aid comprising:
a secondary battery disposed in said hearing aid;
a power supplying resonance coil that generates a power supplying resonance coil magnetic field in a magnetic field space;
a power receiving module disposed in said hearing aid having a power receiving resonance coil that generates a power receiving resonance coil magnetic field in said magnetic field space, said power supplying resonance coil placed at a distance from said power receiving resonance coil so that said power supplying resonance coil magnetic field interacts with said power receiving resonance coil magnetic field in said magnetic field space such that said magnetic field space has a magnetic field strength, at and around an inner side of said power receiving resonance coil, that is lower than a magnetic field strength surrounding said magnetic field space;
a control substrate disposed in said magnetic field space in said hearing aid to reduce the size of said hearing aid, said control substrate comprising:
a charging unit configured to charge said secondary battery from power supplied by said power receiving resonance coil;
a plurality of transformation units that connect power from said secondary battery to a driving voltage for driving components of said hearing aid;
a detection unit configured to detect power received by said power receiving resonance coil; and
a switching controller that switches at least one of said plurality of transformation units off upon detection of power received from said power receiving resonance coil.