Abstract: An encoder includes a position data obtainer that obtains superordinate data representing a position of a moving body in a superordinate section and subordinate data representing a position in a subordinate section repeated in a superordinate section with higher resolution than that of the superordinate data, a storage in which a correction value that can correct a deviation amount occurring in the superordinate data against the subordinate data is recorded to be associated with an absolute position with resolution nearly equal to that of the superordinate data, a corrector that obtains the correction value from the storage and corrects the superordinate data, and a section identifier that identifies, based on the superordinate data corrected by the corrector and the subordinate data when the superordinate data is obtained, the subordinate section in which the subordinate data is obtained against the superordinate section.

Abstract: Reflected light can be effectively utilized by increasing a light receiving area. Incremental light receiving element groups are separated and arranged in the circumferential direction of a rotating unit while placing a light source therebetween. First and second absolute light receiving element groups are arranged at both sides of the outside and inside of the light source in the radial direction of the rotating unit. As a result, first and second absolute light receiving elements are continuously arranged, and also the incremental light receiving element groups and the absolute light receiving element groups can be arranged to surround the periphery of the light source from four directions.

Abstract: A rotation detector of a motor according to an embodiment includes a first support and a second support, a pair of magnetic field forming units, at least one magnetic field detector, and a first magnetic member and a second magnetic member. The first magnetic member and the second magnetic member are each made of a magnetic material, cover longitudinal-direction both ends of the magnetic field detector facing the first support, respectively, and face each other with a gap interposed therebetween at a longitudinal-direction mid-portion of the magnetic field detector in the longitudinal direction. A dimension of each of the magnetic field forming units in a tangential direction of a circumference is larger than a dimension of the corresponding magnetic field forming unit in a radial direction and is larger than the distance of the gap.

Abstract: This disclosure discloses a servomotor production method of a servomotor including a motor and an encoder. The encoder includes a rotating disk and an optical module. The rotating disk is mounted on a shaft of the motor and includes at least one concentric slit formed around a disk center. The optical module is provided with a light receiving element configured to receive light emitted from a light source and subjected to an action of the concentric slit on a substrate. The servomotor production method includes adjusting a position of the optical module with respect to the rotating disk by using the concentric slit by means of an output of the light receiving element when the optical module is fixed and arranged facing the rotating disk.

Abstract: An encoder includes a slit array along a first measurement axis, and an optical module capable of relatively moving with respect to the slit array. The optical module comprises a point light source that irradiates the part of the slit array, and a light receiving array comprising a plurality of light receiving elements along a second measurement axis and arranged in positions offset with respect to the point light source. The light receiving elements is receiving light irradiated from the point light source and reflected from the reflection slit. The plurality of light receiving elements comprises respective shapes such that the light receiving element nearer to the point light source comprises a shorter length in a width direction and end parts on an opposite side of the light receiving element with respect to the point light source are arranged side by side in positions along the second measurement axis.

Abstract: A vehicle window opening/closing device 1 comprises: an inversion pulley 12 provided to an upper portion of a guide rail 10; a drive mechanism 14 provided, in line, to a lower end of the guide rail 10, and constituted so that a speed reduction mechanism including a worm and a worm wheel, and a drum connected concentrically with the worm wheel are received into a same housing 15; a close-side cable 24, whose one end is fixed to the drum and whose other end is coupled to a carrier plate 11 via the inversion pulley 12; an open-side cable 25, whose one end is fixed to the drum and whose other end is coupled directly to the carrier plate 11; and an electric motor 17 having an armature coupled mechanically to the worm, the electric motor being capable of being coupled to the drive mechanism 14.

Abstract: A rotation detector provided in a motor unit according to an embodiment includes a first support and a second support, a pair of magnetic field generator, at least one magnetic field detector, and a first magnetic member and a second magnetic member. The pair of magnetic field generator is provided on the first support in a manner facing the second support, and has opposite polarities. The magnetic field detector is formed by winding a coil around a magnetic element whose magnetized direction changes in the longitudinal direction, and is provided on the second support in such a manner that a longitudinal-direction side of the magnetic element faces the first support. Each of the first magnetic member and the second magnetic member is made of a magnetic material, and covers a longitudinal-direction end of the magnetic field detector facing the first support.

Abstract: This disclosure discloses an encoder. The encoder includes a slit array and an optical module. The optical module includes a point light source and a light receiving array comprising a plurality of light receiving elements arranged side by side along the measurement axis and arranged around the point light source in a plane parallel to the slit array, the light receiving elements being respectively receiving light irradiated from the point light source and reflected from the reflection slit. The light receiving array includes a first light receiving array and a second light receiving array. The point light source, the first light receiving array and the second light receiving array are arranged in the manner that a shortest distance between the point light source and the first light receiving array is smaller than a shortest distance between the point light source and the second light receiving array.

Abstract: An encoder includes a disc-shaped disk disposed so as to be rotatable about a rotation axis and having at least one ring-shaped track in which a rotating grating is formed and at least one fixed grating which is fixedly disposed opposed to the disk so that the fixed grating and the rotating grating construct a diffraction interference optical system. Each of a plurality of slits included in the at least one rotating grating is formed along a curved line obtained by making each of a plurality of radial lines using the rotation axis as a center curved in the circumferential direction at a predetermined curve degree so that a pitch of the slits can be set to a predetermined value.

Abstract: Reflected light can be effectively utilized by increasing a light receiving area. Incremental light receiving element groups are separated and arranged in the circumferential direction of a rotating unit while placing a light source therebetween. First and second absolute light receiving element groups are arranged at both sides of the outside and inside of the light source in the radial direction of the rotating unit. As a result, first and second absolute light receiving elements are continuously arranged, and also the incremental light receiving element groups and the absolute light receiving element groups can be arranged to surround the periphery of the light source from four directions.

Abstract: The encoder includes a disk in a disk shape that is arranged rotatably about a rotation axis and that includes one track in a ring shape on which a rotating grating is formed and one or more origin detection areas serving as partial areas on which a rotating grating is formed, and a mask that is fixed and arranged in a manner facing the disk and on which one or more fixed gratings are formed so as to constitute a diffraction interference optical system together with the rotating gratings. A plurality of slits and included in at least one rotating grating are formed along a curved line obtained by curving a plurality of radial lines about the rotation axis in the circumferential direction at predetermined curvature such that pitches and of the slits and can be set to a predetermined value.

Abstract: An encoder includes a disk including a first track and a second track each being ring-shaped and provided with a rotary grating, and a first detector and a second detector that are fixedly disposed so as to respectively face the first track and the second track each provided with a fixed grating that detects diffracted interfering light. A plurality of slits of the first track are formed as curved slits. The first detector facing the first track is disposed at a position where a tangent of each of the slits included in the diffraction grating of the first track becomes parallel to a tangent of each of the slits included in the diffraction grating of the second track at a position where the second detector faces the second track.

Abstract: A speed reducer (32) including a gear case (33) is attached in an electric motor, and a pinion is provided to an output shaft (35) protruding from the gear case (33). A base portion (33a) protruding in a diametrical direction is provided to the gear case (33) and a support shaft is mounted to the base portion (33b). A sector gear (42) is fixed to a base end of a lift arm (24), and the sector gear (42) is swingably supported by the support shaft and meshed with the pinion. In addition, a groove portion (42c) in a circular arc shape is provided to the sector gear (42), and a gear cover (51) is fixed to the gear case (33) by a bolt (58) penetrating the groove portion (42c) and a bolt (54) disposed on an outer periphery side than the sector gear (42), and the gear cover (51) covers a mesh portion of the pinion and the sector gear (42) and presses the sector gear (42) toward the gear case (33).

Abstract: An encoder includes: a main scale having two or more band-shaped tracks in each of which an optical main grating is formed so that longitudinal direction of the main scale corresponds to a measurement axis direction; and an index scale opposed to the main scale so as to form a diffraction interference optical system in cooperation with the main grating, disposed so as to be movable relative to the main scale in the measurement axis direction, and in which two or more optical index gratings are formed. A plurality of slits included in the main grating in at least one track are formed so as to be inclined at a predetermined inclination angle from a direction perpendicular to the measurement axis direction so that pitch of the slits in the track becomes equal to the pitch of the slits in the at least one other track.

Abstract: Provided is a music genre judging device capable of judging a genre of music with a comparatively simple configuration.

Abstract: An optical encoder includes a rotation disc, an annular slit, a light source, an absolute-value-related detecting unit, and a signal processing device. The annular slit includes a first annular slit and a second annular slit which are decentered in a mutually different direction. The light source is configured to irradiate light on the annular slit. The absolute-value-related detecting unit is configured to detect transmitted light or reflected light irradiated from the light source and transmitted or reflected at the annular slit to output a detected signal. The absolute-value-related detecting unit includes a first detecting unit corresponding to the first annular slit and a second detecting unit corresponding to the second annular slit. The signal processing device is configured to detect an absolute rotational angle of the rotation disc based on the detected signal output from the absolute-value-related detecting unit.

Abstract: This disclosure discloses a servo motor manufacturing method, includes a disk position adjusting that adjusts a position of a rotating disk with respect to a shaft, in a case where said rotating disk to which at least one concentric pattern is formed around a disk center is to be fixed to said shaft of a motor, wherein in said disk position adjusting, said concentric pattern is used as a scale of a linear encoder to adjust an eccentricity of said rotating disk.

Abstract: An encoder includes a slit array along a first measurement axis, and an optical module capable of relatively moving with respect to the slit array. The optical module comprises a point light source that irradiates the part of the slit array, and a light receiving array comprising a plurality of light receiving elements along a second measurement axis and arranged in positions offset with respect to the point light source. The light receiving elements is receiving light irradiated from the point light source and reflected from the reflection slit. The plurality of light receiving elements comprises respective shapes such that the light receiving element nearer to the point light source comprises a shorter length in a width direction and end parts on an opposite side of the light receiving element with respect to the point light source are arranged side by side in positions along the second measurement axis.

Abstract: In order to solve various problems such as a reduction in a paint resin with the progress of electrodeposition coating treatment and remelting of a coating film or the occurrence of pinholes caused by an increased concentration of an electrolyte as a result of the reduction, upsizing of a hollow electrode with a membrane for electrodeposition coating combined with a barrier membrane (e.g., an ion exchange membrane) and an increase in the number of components should be avoided. In order to realize this, a barrier membrane 20 such as an ion exchange membrane is attached to the exterior surface of an electrode main body 10, which is in a hollow state made of a conductive material and configured so as to allow a liquid to pass through freely between the inside and outside of the electrode serving as a support.