US 12,247,570 B2
CPAP device
Yuzo Higashiyama, Kyoto (JP); and Takahiro Yamaguchi, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Oct. 18, 2022, as Appl. No. 18/047,313.
Application 18/047,313 is a continuation of application No. PCT/JP2021/018256, filed on May 13, 2021.
Claims priority of application No. 2020-086002 (JP), filed on May 15, 2020.
Prior Publication US 2023/0114545 A1, Apr. 13, 2023
Int. Cl. F04D 25/06 (2006.01); F04D 29/58 (2006.01)
CPC F04D 25/0606 (2013.01) [F04D 29/58 (2013.01); F04D 25/062 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A continuous positive airway pressure device, comprising:
a housing, a motor accommodated in the housing, and a blower fan rotatable by the motor,
wherein the motor includes
a stator assembly including a plurality of coils arranged in a circumferential direction,
a rotor assembly including a permanent magnet and disposed in an inner side portion of the stator assembly in a radial direction,
an output shaft fixed to the rotor assembly and configured to rotate together with the rotor assembly, and
a base having an insertion hole into which part of the output shaft is inserted and supporting the output shaft,
the stator assembly is fixed to the base,
a plain bearing is interposed between an inner peripheral surface of the insertion hole and an outer peripheral surface of the output shaft, and
the blower fan is fixed to the output shaft,
wherein the base includes a bottomed cylindrical main body portion and a cylindrical pivotally support portion protruding from a bottom portion of the main body portion,
an inside of the pivotally support portion forms the insertion hole, and
an outer peripheral surface of the pivotally support portion and the rotor assembly face each other with no other member interposed therebetween, and the rotor assembly and the stator assembly face each other with no other member interposed therebetween.