Abstract: A bearing structure includes: a shaft; an oil-impregnated bearing that supports the shaft to be rotatable and includes a first sintered metal material having a first density; a bearing holder that supports an outer circumferential surface of the oil-impregnated bearing; and a seal member that is provided at an opening of the bearing holder, wherein the shaft is provided with an annular groove having a side surface portion that has an outer diameter that decreases as the side surface portion separates away from one end surface of the oil-impregnated bearing, and wherein the seal member includes a second sintered metal material having a second density that is lower than the first density of the first sintered metal material.

Abstract: A fan device includes: a stator core having a plurality of salient poles that protrude outwards in a radial direction; a rotor magnet that is rotatably provided outside the stator core; and a dustproof cover mounted to the stator core and positioned between the stator core and the rotor magnet, wherein the dustproof cover has a cylindrical part having an inner surface being provided with one or more convex part, the convex part being fitted into a slot gap between distal ends of adjacent two of the salient poles.

Abstract: A planar lighting device includes: a light source; a light-guiding plate including: a light incident end face on which the light source is arranged; a facing end face facing the light incident end face; and a pair of principal faces that couple the light incident end face and the facing end face with each other; and plurality of optical elements that are provided on at least one of the pair of the principal faces and include a plurality of first elements each having an unevenly shaped part in which recesses and/or projections are repeatedly arranged, the plurality of the first elements being arranged intermittently from the light incident end face toward the facing end face.

Abstract: A motor shaft is configured to be press-fitted into a hole formed in a press-fitted component from a front end side in an axial direction. The motor shaft includes: a shaft body; a first annular projection portion that protrudes outwardly in a radial direction of the shaft body and is brought into contact with an inner circumferential surface of the hole the first annular projection portion being positioned at a first position; and a second annular projection portion that protrudes outwardly in the radial direction of the shaft body and is brought into contact with the inner circumferential surface of the hole, the second annular projection portion being positioned at a second position that is shifted from the first position toward a rear end side in the axial direction of the shaft body.

Abstract: A centrifugal fan includes: a casing; and an impeller that is attached to a rotation shaft of a motor, wherein the casing has an upper suction port and a lower suction port, wherein the impeller has a rotor hub, a plurality of blades arranged around the rotor hub in a circumferential direction, and a main plate coupled to the rotor hub and connects the blades in the circumferential direction, and wherein an inclination of an outer edge of the blades at an upper blade portion that is located above the main plate with respect to a plane parallel to the rotation shaft and an inclination of the outer edge of the blades at a lower blade portion that is located below the main plate with respect to the plane parallel to the rotation shaft are set to be in the same direction.

Abstract: A axial flow fan includes an impeller having a plurality of blades, a motor arranged to rotate the impeller, and a casing accommodating the impeller and the motor. The casing includes a cylindrical housing, a motor base configured to hold the motor, and a plurality of spokes connecting the housing with the motor base. The plurality of spokes include a spoke having a straight shape and a spoke having a curved shape that is convex toward a rotational direction of the impeller. The axial flow fan further includes a lead wire for supplying electric power to the motor. When a radial length of the spoke having the straight shape is defined as L and an amount of the curvature of the spoke having the curved shape is defined as X, a displacement of the curved shape (X/L) is less than 0.2.

Abstract: A remote control device includes: a detector that detects a time-dependent change of a position of a recognition target object; a motion recognition unit that recognizes a gesture corresponding to the time-dependent change of the position of the recognition target object detected by the detector; a controller that generates a control signal based on the gesture recognized by the motion recognition unit; and a transmitter that transmits the control signal to an apparatus having a drivable portion to command a movement of the drivable portion.

Abstract: A planar illumination device includes: a frame including a side wall; a circuit board including a mounted portion arranged on the side wall, and a folded portion folded with respect to the mounted portion; a plurality of point light sources arranged on the mounted portion; a light guiding plate that includes an incoming surface facing the plurality of point light sources and that is accommodated in the frame; and a fixing nail that is formed in the light guiding plate, protrudes from the incoming surface towards a part of the mounted portion where the plurality of point light sources are not arranged and arranges the mounted portion on the side wall.

Abstract: A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.

Abstract: An impeller for a centrifugal fan includes a main plate having a disc shape, a plurality of blades arranged along a circumferential direction about a center part of the main plate, and an outer ring having a ring shape connecting the respective blades. The outer ring is connected to tip end portions of the respective blades at a side of a fluid discharge opening, and each of the blades has a shape which is bent in a rotating direction of the impeller in a vicinity of the tip end portion.

Abstract: A motor drive controller includes: an advance-angle reference voltage generator that generates an advance-angle reference voltage; a back electromotive voltage comparator that generates phase signals of phases at a cross timing of the advance-angle reference voltage and back electromotive voltages of phases of a motor; and a controller that operates to perform a process including: detecting a rotation speed of the motor based on the phase signals of the phases; increasing the advance-angle reference voltage when the rotation speed moves from a high speed to a low speed; and decreasing the advance-angle reference voltage when the rotation speed moves from a low speed to a high speed.

Abstract: A centrifugal fan includes: a casing having an upper casing with an air suction opening, a lower casing, and a plurality of support members disposed between the lower casing and the upper casing with air discharge openings provided between the support members; an impeller disposed between the upper and lower casings, and including an annular upper shroud provided on an upper casing side, a base plate integrally formed with the annular upper shroud, and a plurality of blades arranged along a circumferential direction between the annular upper shroud and the base plate; and a fan motor which rotates the impeller. A plurality of recesses are provided on the upper surface of the upper casing, and formed to surround the air suction opening, and a plurality of ribs are radially provided around the air suction opening and between the adjacent recesses.

Abstract: There is provided a resin composition for a machinable liner of a sliding member. An ultraviolet curable resin composition for a self-lubricating liner contains a (meth)acrylate compound having an isocyanuric acid ring represented by the following formula and PTFE as a solid lubricant. In the formula (1), X is a group which contains an acryloyl group and is composed only of C, H, and O. Y and Z are groups each composed only of C, H, and O. PTFE is contained in an amount of 10 to 50% by weight with respect to a total amount of the ultraviolet curable resin composition. The ultraviolet curable resin composition is suitable for a self-lubricating liner 24 of a spherical bearing 20 having an outer race 22 and an inner race 26.

Abstract: A planar lighting device includes a light guide plate, a plurality of light sources arranged in a line shape along a longitudinal direction of a side end face of the light guide plate, and a mounting substrate, on which the light sources are mounted. The mounting substrate has a base material, a conduction pattern formed on the base material, and a cover member arranged on the conduction pattern. The conduction pattern includes pairs of lands corresponding to a plurality of electrode terminals of each light source and to which the pair of electrode terminals is respectively connected, and first and second extension parts that are respectively connected to the pair of lands, extend from a first end portion of the lands, which faces the land of the adjacent light source, extend toward opposite sides of the light guide plate and to extend under the cover member.

Abstract: A motor includes a rotor frame; a shaft; first and second rotor magnets that are coupled with the shaft, formed separately, and spaced apart in an axial direction of the shaft; a stator portion having a stator core, a winding around the stator core, and a plurality of first salient pole portions; a torque holding portion facing the rotor magnets in a radial direction, being arranged between the rotor frame and the stator portion in the axial direction of the shaft, and having a plurality of second salient pole portions; and a circuit board arranged, in the axial direction of the shaft, on a side of the stator portion opposite the rotor frame. An electronic component is arranged at the circuit board.

Abstract: A brushless motor is provided with: a shaft; a rotor; a stator; a cylindrical oil-retaining bearing; a bearing holding part; an attraction magnet disposed at a position facing one end of the shaft and configured to attract the shaft by a magnetic force; and a thrust plate disposed between the attraction magnet and the one end of the shaft, wherein a magnet holder made of a magnetic material is formed integrally to the bearing holding part, the magnet holder being installed with the attraction magnet, and wherein a side of the magnet holder, on which the attraction magnet is installed, is covered by a material for forming the bearing holding part, except for an installation surface on which the attraction magnet is installed, or for a proximity of the installation surface.

Abstract: A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.

Abstract: A PM stepping motor includes a two-phase stator which includes first and stator stators, and a rotor which is rotatably supported inside the two-phase stator. Each of the first and second stators includes an outer yoke, an inner yoke and a coil. Each of the first and second stators is formed with a convex portion and a concave portion. The convex portion formed on the inner yoke of the first stator is engaged with the concave portion formed on the inner yoke of the second stator. The inner yoke is formed with two protrusions engaged with a cutout of the outer yoke. The convex portion and the concave portion are arranged line-symmetrically with respect to a center line passing through a center point of the inner yoke and a center position between the two protrusions, and an angle ? between each position and the center line ranges 30°<?<90°.

Abstract: A controller of a motor controller operates to perform a process including: controlling the H bridge circuit to switch to the charge mode; controlling the H bridge circuit to switch to the high-dissipation mode when the zero-cross detector detects that the back electromotive force voltage of the motor coil connected to a phase of the H bridge circuit shortly before the H bridge circuit is zero-crossed; controlling the H bridge circuit to switch to the low-dissipation mode after a predetermined time has elapsed; and controlling the H bridge circuit to switch to the free mode when the motor current detector detects that the motor current flowing in the motor coil connected to the H bridge circuit flows in a direction opposite to that in the charge mode.

Abstract: A motor drive control device, which drives a motor including a plurality of phase coils and a rotor, includes: a motor driver, which outputs a drive signal to the phase coils on a drive control signal; one position sensor, which is provided in a position where a timing of at least one of a rising edge and a falling edge of a rotor position signal is near a zero cross timing of a phase signal of any phase coil; and a controller that: generates the drive control signal based on the phase signal in a case where a rotational speed of the motor is less than a predetermined rotational speed; and generates the drive control signal based on the rotor position signal output from the one position sensor in a case where the rotational speed is equal to or more than the predetermined rotational speed.