US 12,261,469 B2
Electric device
Kiyotaka Miyauchi, Osaka (JP); and Eiji Sato, Osaka (JP)
Assigned to Hosiden Corporation, Osaka (JP)
Filed by HOSIDEN CORPORATION, Osaka (JP)
Filed on Apr. 28, 2023, as Appl. No. 18/140,754.
Claims priority of application No. 2022-080913 (JP), filed on May 17, 2022.
Prior Publication US 2023/0378788 A1, Nov. 23, 2023
Int. Cl. G01D 5/14 (2006.01); H01F 7/02 (2006.01); H02J 7/00 (2006.01); H05K 5/00 (2025.01); H05K 5/02 (2006.01)
CPC H02J 7/0063 (2013.01) [G01D 5/14 (2013.01); H01F 7/02 (2013.01); H05K 5/0086 (2013.01); H05K 5/0217 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electric device, comprising:
an electric circuit;
a power supply circuit configured to feed electric power to the electric circuit and stop the feed; and
a housing containing the electric circuit and the power supply circuit in an internal space,
the power supply circuit including:
a battery; and
an output controller configured to control an output of the battery,
the output controller including a magnetic sensor configured to detect magnetism and a power keep circuit,
the output controller being configured to,
in response to a first operation performed from outside the housing while the power supply circuit is in an OFF state, the OFF state being a state in which the battery feeds no electric power to the electric circuit, cause the power supply circuit to transition to an ON state, the ON state being a state in which the battery continuously feeds electric power to the electric circuit even after an end of the first operation,
in response to a second operation performed while the power supply circuit is in the ON state, cause the power supply circuit to transition to the OFF state,
the first operation is an operation of bringing a magnet close to the magnetic sensor outside the housing,
the magnetic sensor functions as a switch configured to cause the output controller to transition to the ON state in response to detecting magnetism of the magnet when the magnet is close to the magnetic sensor,
the power keep circuit includes an ON terminal connected to the magnetic sensor and configured to change its potential when the magnet is close thereto, and
the power keep circuit is configured so that when the magnet is close to the magnetic sensor, the potential of the ON terminal is changed to cause the power supply circuit to transition to an ON state, and when the magnet is separated from the magnetic sensor and magnetism does not act on the magnetic sensor after the power supply circuit transitions to the ON state, the power supply circuit remains in the ON state.