Abstract: An axial alignment structure for a fluid pressure pump (100) includes: a first housing made of a resin; and a second housing made of a resin, in which a housing is configured in a state where the first housing and the second housing are joined to each other by thermal welding at a welding position, and a pump rotor is accommodated in the housing, and the first housing and the second housing have an axial alignment mechanism that axially aligns the first housing and the second housing such that axes of the first and second housings coincide with each other at the time of joining of the first housing and the second housing to each other by the thermal welding.

Abstract: An axial alignment structure for a fluid pressure pump (100) includes: a first housing made of a resin; and a second housing made of a resin, in which a housing is configured in a state where the first housing and the second housing are joined to each other by thermal welding at a welding position, and a pump rotor is accommodated in the housing, and the first housing and the second housing have an axial alignment mechanism that axially aligns the first housing and the second housing such that axes of the first and second housings coincide with each other at the time of joining of the first housing and the second housing to each other by the thermal welding.

Abstract: An electric pump includes: a casing; a shaft member whose one end portion is fixed to the casing; first and second bearing portions disposed to an outer circumferential side of the shaft member at positions close to the one end portion of the shaft member and the other end portion of the shaft member, respectively; a rotor accommodated in the casing and integrally rotating with the first and second bearing portions; an impeller fixed to the rotor at a position close to the other end portion; an impeller housing connected to the casing in a state where the other end portion is inserted into the impeller housing and accommodating the impeller; and a slide-contacting member disposed between the impeller housing and the second bearing portion and coming into slide-contact with the second bearing portion.

Abstract: A rotating electrical machine includes: a core including an annular yoke portion disposed while being centered around a rotation axis; toothed portions protruding from the yoke portion in a radial direction; and a tooth flange portion circumferentially sticking out from a protruding end of each of the toothed portions while being centered around the rotation axis; and an insulator covering a region from the toothed portion to the tooth flange portion, wherein the insulator includes a tooth cover portion, and a flange cover portion, and a reinforced portion is formed at the boundary between the tooth cover portion and the flange cover portion, and includes a first restricting surface, and a second restricting surface.

Abstract: An electric pump includes: a case; a shaft member fixed to the case; a cylindrical bearing inserted on the outside of the shaft member; a rotor configured as a member separate from the bearing, and configured to rotate integrally with the bearing; and an impeller fixed to one end of the rotor, wherein a discharge path is formed between the bearing and the rotor along an axial direction, and allows fluid to return to the impeller therethrough, the fluid flowing from the outer circumference of the impeller into the case, and circulating in the case.

Abstract: A rotating electrical machine includes: a core including an annular yoke portion disposed while being centered around a rotation axis; toothed portions protruding from the yoke portion in a radial direction; and a tooth flange portion circumferentially sticking out from a protruding end of each of the toothed portions while being centered around the rotation axis; and an insulator covering a region from the toothed portion to the tooth flange portion, wherein the insulator includes a tooth cover portion, and a flange cover portion, and a reinforced portion is formed at the boundary between the tooth cover portion and the flange cover portion, and includes a first restricting surface, and a second restricting surface.

Abstract: Using a simple and inexpensive method, a reliable spindle motor having a simple and inexpensive structure is afforded, in which contact failure of the FPC does not occur even when the motor undergoes external impact. An extending portion is provided radially outer side of an annular recess of a base. The extending portion has a step whose radially outer side is higher, and a through hole formed such as to pass through the base from its inside to outside. A FPC is disposed on an upper surface of a stator. The FPC is fixed to a lower surface of the base through the through hole. The bending height and the bending angle of the FPC are minimized by providing the step having appropriate height so that the FPC is not easily peeled off even when subject to external impact.

Abstract: In a motor of a motor unit, a base plate includes a raised portion protruding from a surrounding portion on a side of the stator portion opposite to a rotor portion. A raised face of the raised portion is perpendicular to a central axis and is formed in an annular shape around the central axis. The raised face of the raised portion protrudes lower than a lower surface of a sticker member stuck around the raised portion to thereby close a hole portion formed around the raised portion.

Abstract: Using a simple and inexpensive method, a reliable spindle motor having a simple and inexpensive structure is afforded, in which contact failure of the FPC does not occur even when the motor undergoes external impact. An extending portion is provided radially outer side of an annular recess of a base. The extending portion has a step whose radially outer side is higher, and a through hole formed such as to pass through the base from its inside to outside. A FPC is disposed on an upper surface of a stator. The FPC is fixed to a lower surface of the base through the through hole. The bending height and the bending angle of the FPC are minimized by providing the step having appropriate height so that the FPC is not easily peeled off even when subject to external impact.

Abstract: Using a simple and inexpensive method, a reliable spindle motor having a simple and inexpensive structure is afforded, in which contact failure of the FPC does not occur even when the motor undergoes external impact. An extending portion is provided radially outer side of an annular recess of a base. The extending portion has a step whose radially outer side is higher, and a through hole formed such as to pass through the base from its inside to outside. A FPC is disposed on an upper surface of a stator. The FPC is fixed to a lower surface of the base through the through hole. The bending height and the bending angle of the FPC are minimized by providing the step having appropriate height so that the FPC is not easily peeled off even when subject to external impact.

Abstract: In a low-profile disk drive device, the hard-disk carrying face of the spindle motor hub is finished to leave a spiral-patterned cutting track. Leaving the spiral-patterned cutting track increases the roughness of the carrying face, but seen in terms of the cutting-track hill portions themselves the surface unevenness is reduced. Because the disk is supported on the hill portions, warpage in the disk is attenuated.

Abstract: Using a simple and inexpensive method, a reliable spindle motor having a simple and inexpensive structure is afforded, in which contact failure of the FPC does not occur even when the motor undergoes external impact. An extending portion is provided radially outer side of an annular recess of a base. The extending portion has a step whose radially outer side is higher, and a through hole formed such as to pass through the base from its inside to outside. A FPC is disposed on an upper surface of a stator. The FPC is fixed to a lower surface of the base through the through hole. The bending height and the bending angle of the FPC are minimized by providing the step having appropriate height so that the FPC is not easily peeled off even when subject to external impact.

Abstract: In a motor of a motor unit, a base plate includes a raised portion protruding from a surrounding portion on a side of the stator portion opposite to a rotor portion. A raised face of the raised portion is perpendicular to a central axis and is formed in an annular shape around the central axis. The raised face of the raised portion protrudes lower than a lower surface of a sticker member stuck around the raised portion to thereby close a hole portion formed around the raised portion.