Abstract: An actuator 1 includes a housing 2, an output shaft 3 protruding from the inside of the housing 2 to the outside, a motor 4 provided in the housing 2, and a reduction mechanism 5 that connects the motor 4 with the output shaft 3. The reduction mechanism 5 includes a worm gear, in which a worm 51 provided at a front end of a drive shaft 42 protruding from a main body 43 of the motor 4 and a worm wheel 52 rotating integrally with the output shaft 3 are engaged. A spindle 41 for increasing an inertia is provided between the worm 51 of the drive shaft 42 and the motor body 43.

Abstract: An actuator 1 includes a housing 2, an output shaft 3 projecting from the inside of the housing 2 to the outside, a motor 4 provided in the housing 2, a reduction mechanism 5 which connects the motor 4 to the output shaft 3, a magnet 61 provided for rotation integrally with the output shaft 3 inside the housing 2, a Hall effect IC 62 disposed to face the magnet 61 outside the rotation locus of the magnet 61, and a circumferential wall 25 disposed to stand from the inner wall of the housing 2 and interposed between the magnet 61 and the Hall effect IC 62.

Abstract: In an Oldham coupling, a first protruding part, protruding in a coaxial direction parallel to and extending in a first direction, is provided in one of first and second members, and the other of the first and second members includes a first notch part fitted to the first protruding part and slidable in the first direction along the first protruding part. A second notch part, extending in a second direction perpendicular to the first direction, is formed in one of second and third members, and the other of the second and third members includes a second protruding part fitted to the second notch part and slidable in the second direction along the second notch part. At least one of the first, second, and the third members has a heat dissipating structure including mutually separated concentric hollow cylinders of different diameters, connected by a bridge part.

Abstract: A shaft-integrated gear includes a rotational shaft formed of a resin material; and a cylindrical gear that is formed of a metal material, wherein the cylindrical gear fits around a gear support part of the rotational shaft.

Abstract: A slip ring for use in a slip ring brush type rotation sensor device, includes a metal ring having an approximately cylindrical shape, and a resin ring that supports the metal ring. Slits extending in an axial direction are formed in respective side surfaces on outer peripheries of the metal and resin rings. The metal ring includes a common part formed on a side surface at one end along the axial direction of the approximately cylindrical shape and segmented by the slits into segments to form common regions, so that adjacent common regions are electrically connectable to each other, and a detection part formed on a side surface at the other end and segmented by the slits into segments to form conducting regions and isolated regions that are alternately provided with the slit interposed between adjacent conducting and isolated regions.

Abstract: A display device includes a first light guide member provided with a first reflecting surface formed at its first end to reflect light emitted by a light source; a second light guide member provided with a penetrating hole in which the first light guide member is intended to be inserted and a second reflecting surface formed at its first end to reflect the light; a first pointer and a second pointer fixed to the first end of the first light guide member and the first end of the second light guide member to be illuminated by the light reflected by the first reflection surface and the second reflection surface, respectively, and a driving member configured to separately rotate the first light guide member and the second light guide member around a same rotation axis with the first pointer and the second pointer, respectively.

Abstract: A display device includes a first light guide member provided with a first reflecting surface formed at its first end to reflect light emitted by a light source; a second light guide member provided with a penetrating hole in which the first light guide member is intended to be inserted and a second reflecting surface formed at its first end to reflect the light; a first pointer and a second pointer fixed to the first end of the first light guide member and the first end of the second light guide member to be illuminated by the light reflected by the first reflection surface and the second reflection surface, respectively, and a driving member configured to separately rotate the first light guide member and the second light guide member around a same rotation axis with the first pointer and the second pointer, respectively.

Abstract: A current detection apparatus includes a magnetic core having a ring shape with a gap and a center opening portion through which a current path is disposed, and a magnetic sensor including a magnetic sensing element such as a Hall effect element arranged in the gap. When a current flows through the current path, the magnetic core generates magnetic flux therein so that magnetic field is generated in the gap. The magnetic sensor outputs different electrical signals, each of which is measured in a different measurement range and corresponds to intensity of the magnetic field in the gap. The current detection apparatus measures the current based on the electrical signals outputted from the magnetic sensor.

Abstract: A signal processing unit includes an integrating unit. The integrating unit is composed of a plurality of digital elements and is operative to integrate a detection signal over every quarter of one cycle of the detection signal to generate an integration value. The integration values to be generated are represented as S1, S2, S3, and S4. A calculating unit includes a plurality of digital elements and performs addition and subtraction on the generated integration values in accordance with the following equations used to calculate an in-phase component and a quadrature-phase component of (Ip=S4p?3+S4p?2?S4p?1?S4p) and (Qp=S4.4?S4p??S4p?1+S4p). Where Ip represents the in-phase component and Qp represents the quadrature-phase component. An amplitude obtaining unit obtains an amplitude of the detection signal based on the in-phase component and the quadrature-phase component.

Abstract: A signal processing unit includes an integrating unit. The integrating unit is composed of a plurality of digital elements and operative to integrate a detection signal over every quarter of one cycle of the detection signal to generate an integration value. The integration values to be generated are represented as S1, S2, S3, S4 . . . . A calculating unit includes a plurality of digital elements and performs addition and subtraction on the generated integration values in accordance with the following equations to calculate an in-phase component and a quadrature-phase component: Ip=S4p?3+S4p?2?S4p?1?S4p Qp=S4p?3?S4p?2?S4p?1+S4p where Ip represents the in-phase component, Qp represents the quadrature-phase component, and p=1, 2, 3 . . . . An amplitude obtaining unit obtains an amplitude of the detection signal based on the in-phase component and the quadrature-phase component.

Abstract: In a radio-controlled device for measuring time, a demodulating unit demodulates the time information from the received electric signal based on amplitude information of the target radio wave. The amplitude information is obtained from in-phase and quadrature-phase components of the target radio wave. A phase calculator calculates phase data associated with a phase of the target radio wave based on the in-phase and quadrature-phase components. A variability calculator calculates a variability of the phase data of the target radio wave relative to a reference phase. The reference phase changes at a constant rate in time according to a frequency error. The frequency error is contained in the reference signal relative to a frequency of the target carrier wave. A reception determining unit determines whether reception of the radio-controlled device is good based on the calculated variability.

Abstract: A current detection apparatus includes a magnetic core having a ring shape with a gap and a center opening portion through which a current path is disposed, and a magnetic sensor including a magnetic sensing element such as a Hall effect element arranged in the gap. When a current flows through the current path, the magnetic core generates magnetic flux therein so that magnetic field is generated in the gap. The magnetic sensor outputs different electrical signals, each of which is measured in a different measurement range and corresponds to intensity of the magnetic field in the gap. The current detection apparatus measures the current based on the electrical signals outputted from the magnetic sensor.

Abstract: A radio wave timepiece A and a quadrature detection device for executing a quadrature detecting method are disclosed including a receiving antenna 14 for receiving a carrier wave of a long wave standard radio wave on which time information is multiplexed, a quadrature detection circuit 18 for performing quadrature detection of the carrier wave in response to a reference clock CK1, commonly used for timekeeping by a time counter 8, to obtain an in-phase component I and a quadrature component Q of the carrier wave for obtaining an amplitude AN,m of the carrier wave, and a time correction means 22, 24, 26 for obtaining time information depending on the amplitude of the carrier wave from the quadrature detection circuit 18. The time counter 8 is responsive to time information delivered from the time correction means to correct current time.

Abstract: A yoke is substantially cylindrical and has an opening portion. A brush holder member is secured to the opening portion of the yoke. The brush holder member retains a pair of supply brushes. A housing member is secured to the opening portion of the yoke on the outside of the brush holder member and covers the opening portion. A pair of securing pieces is formed integrally with the yoke. The securing pieces secure the brush holder member and the housing member to the yoke.

Abstract: A brush device has a brush that slides against an outer circumferential surface of a cylindrical rotor. The brush device includes a base member, a terminal retained by the base member, an electric wire, which connects the brush to the terminal, and a cylindrical brush holder. The brush holder is located on the base member. The brush holder has a holder axis, which extends along the radial direction of the rotor. The brush is accommodated in and retained by the brush holder and is movable along the holder axis. The brush holder has an opening portion, which is formed at the outer portion of the brush holder with respect to the radial direction of the rotor. The opening portion permits the brush to pass along a direction perpendicular to the holder axis.

Abstract: A yoke is substantially cylindrical and has an opening portion. A brush holder member is secured to the opening portion of the yoke. The brush holder member retains a pair of supply brushes. A housing member is secured to the opening portion of the yoke on the outside of the brush holder member and covers the opening portion. A pair of securing pieces is formed integrally with the yoke. The securing pieces secure the brush holder member and the housing member to the yoke.

Abstract: A brush device has a brush that slides against an outer circumferential surface of a cylindrical rotor. The brush device includes a base member, a terminal retained by the base member, an electric wire, which connects the brush to the terminal, and a cylindrical brush holder. The brush holder is located on the base member. The brush holder has a holder axis, which extends along the radial direction of the rotor. The brush is accommodated in and retained by the brush holder and is movable along the holder axis. The brush holder has an opening portion, which is formed at the outer portion of the brush holder with respect to the radial direction of the rotor. The opening portion permits the brush to pass along a direction perpendicular to the holder axis.

Abstract: A magnetic sensor includes a magnetic core, an excitation coil, an oscillator and an excitation circuit, a detection coil, and a latch circuit. The excitation coil is wound on the magnetic core. The oscillator and the excitation circuit repeatedly supply a rectangular wave excitation current having a given polarity to the excitation coil. The detection coil is wound on the magnetic core on which the excitation coil has been wound. The detection coil generates an output signal having peaks of opposite polarities corresponding to magnitudes of a target measurement magnetic field in response to leading and trailing edges of the rectangular wave excitation current.

Abstract: In an acceleration switch, a magnetic contact opening/closing member is disposed at a horizontal initial position above a holding member. The end portion of the contact opening/closing member is pushed upward from the initial position by a ball that rolls along the tilt surface of the holding member with an inertia. First and second leaf springs are disposed to oppose each other on rolling and non-rolling sides of the ball through the holding member, and have upper free ends for sandwiching two end portions of the contact opening/closing member at the initial position. At least the first leaf spring is made of a conductive material and imparted with properties to swing in a direction to come close to the second leaf spring. When the contact opening/closing member is at the initial position, the first leaf spring is pressed by the contact opening/closing member in a direction to come close to an electrode plate against the swing properties and comes into contact with the electrode plate.

Abstract: In a stepping motor, each of four integrally molded annular stators constituting two pairs has an annular plate having a central hole in which a magnet rotor is to be inserted, and pole teeth that form magnetic pole portions separated from the magnet rotor at a predetermined gap. The pole teeth of one annular stator of a given pair extend from the annular plate to be perpendicular to the other of the given pair, and are equidistantly arranged around the central hole to be shifted from the pole teeth of the other annular stator by a half pitch. Mounting holes are formed in each annular plate at predetermined spaces in the circumferential direction, and the mounting holes formed in the annular plates of given annular stators of different pairs that are arranged back to back are located at the same positions. Molded insulating films are formed on surfaces, which do not oppose the magnet rotor, of all the annular stators.