Abstract: A switch device including a base member provided with a stem insertion hole, an operation member which is slidably inserted into the stem insertion hole of the base member and has an engaging groove provided in an outer circumference surface, a stopper member having an engaging section which is arranged in the engaging groove of the operation member and moved along with sliding of the operation member, and a separation regulation section which prevents the engaging section from being separated from the engaging groove, in which a leading end portion of the engaging section is positionally regulated toward axial center of the operation member by the separation regulation section when the operation member is pulled toward the outside of the base member.

Abstract: A battery holding device includes a battery holding member and a plate. The plate houses the battery holding member. The battery holding member includes a fastener and a battery holder. The fastener is fixed to the plate. The battery holder holds a battery, and is arranged at a position where the battery holder does not contact the plate.

Abstract: A switch device including a base member provided with a stem insertion hole, an operation member which has an engaging groove provided in an outer circumferential surface thereof, and is slidably and rotatably inserted into the stem insertion hole of the base member, a stopper member having an engaging portion which is arranged in the engaging groove of the operation member and moved along with sliding of the operation member, and a release member which releases the engaging portion from the engaging groove, in which the release member includes a pressing portion which is operated from one surface side of the base member so as to release the engaging portion from the engaging groove.

Abstract: A switch device including a base member provided with a stem insertion hole, an operation member which has an engaging groove provided in an outer circumferential surface thereof, and is slidably and rotatably inserted into the stem insertion hole of the base member, a stopper member having an engaging portion which is arranged in the engaging groove of the operation member and moved along with sliding of the operation member, and a release member which releases the engaging portion from the engaging groove, in which the release member includes a pressing portion which is operated from one surface side of the base member so as to release the engaging portion from the engaging groove.

Abstract: A battery holding device includes a battery holding member and a plate. The plate houses the battery holding member. The battery holding member includes a fastener and a battery holder. The fastener is fixed to the plate. The battery holder holds a battery, and is arranged at a position where the battery holder does not contact the plate.

Abstract: A switch device including a base member provided with a stem insertion hole, an operation member which is slidably inserted into the stem insertion hole of the base member and has an engaging groove provided in an outer circumference surface, a stopper member having an engaging section which is arranged in the engaging groove of the operation member and moved along with sliding of the operation member, and a separation regulation section which prevents the engaging section from being separated from the engaging groove, in which a leading end portion of the engaging section is positionally regulated toward axial center of the operation member by the separation regulation section when the operation member is pulled toward the outside of the base member.

Abstract: A driving device includes a stepping motor having a rotor, a coil for rotating the rotor, and a processor that drives the stepping motor. The processor generates a driving pulse for rotating the rotor of the stepping motor to a prescribed position, and outputs the driving pulse to the coil; and generates a rotation assistance pulse for rotating the rotor of the stepping motor at a prescribed speed, and outputs the rotation assistance pulse to the coil, after outputting the driving pulse but before EMF is produced by the rotation of the rotor of the stepping motor caused by the driving pulse.

Abstract: A coil core including a coil block configured by a coil wound around the coil core which is coupled to a stator, a linear portion around which a wire is wound to form a coil; and coil-side couplers which are extended to both sides along a direction orthogonal to an extending direction of the linear portion, wherein the coil-side couplers include a thinner portion than the linear portion.

Abstract: In a timepiece 100 having an antenna 3 and motors 4, each motor 4 includes a stator 41, a coil 42 magnetically connected to the stator 41, and a rotor magnet 431 disposed in a receiving part 411 of the stator 41. With respect to each motor 4 disposed in a predetermined range from the antenna 3, an individual antimagnetic plate 5 which is a belt-like antimagnetic plate configured to have a width equal to or greater than the diameter of the rotor magnet 431 and cover a portion of the motor 4 including the rotor magnet 431 is disposed.

Abstract: A coil core including a coil block configured by a coil wound around the coil core which is coupled to a stator, a linear portion around which a wire is wound to form a coil; and coil-side couplers which are extended to both sides along a direction orthogonal to an extending direction of the linear portion, wherein the coil-side couplers include a thinner portion than the linear portion.

Abstract: A driving device includes a stepping motor having a rotor, a coil for rotating the rotor, and a processor that drives the stepping motor. The processor generates a driving pulse for rotating the rotor of the stepping motor to a prescribed position, and outputs the driving pulse to the coil; and generates a rotation assistance pulse for rotating the rotor of the stepping motor at a prescribed speed, and outputs the rotation assistance pulse to the coil, after outputting the driving pulse but before EMF is produced by the rotation of the rotor of the stepping motor caused by the driving pulse.

Abstract: Disclosed is a stepping motor including a rotor, a stator which includes a rotor accommodating hole, a pair of outer notches to determine positions of saturated magnetic fluxes and inner notches disposed on an inner periphery of the stator around the rotor accommodating hole, the inner notches determining stably stationary positions of the rotor, and a coil block configured by a coil wound around a coil core which is magnetically coupled to the stator, and the outer notches are disposed on an outer periphery of the stator on opposite sides of the rotor accommodating hole. And a line that connects narrowest portions between the outer notches and the rotor accommodating hole and extends through a center of the rotor accommodating hole shifts by a predetermined angle from a line that extends through the center of the rotor accommodating hole and is orthogonal to an extending direction of the stator.

Abstract: In a timepiece 100 having an antenna 3 and motors 4, each motor 4 includes a stator 41, a coil 42 magnetically connected to the stator 41, and a rotor magnet 431 disposed in a receiving part 411 of the stator 41. With respect to each motor 4 disposed in a predetermined range from the antenna 3, an individual antimagnetic plate 5 which is a belt-like antimagnetic plate configured to have a width equal to or greater than the diameter of the rotor magnet 431 and cover a portion of the motor 4 including the rotor magnet 431 is disposed.

Abstract: Disclosed is a stepping motor including a rotor, a stator which includes a rotor accommodating hole, a pair of outer notches to determine positions of saturated magnetic fluxes and inner notches disposed on an inner periphery of the stator around the rotor accommodating hole, the inner notches determining stably stationary positions of the rotor, and a coil block configured by a coil wound around a coil core which is magnetically coupled to the stator, and the outer notches are disposed on an outer periphery of the stator on opposite sides of the rotor accommodating hole. And a line that connects narrowest portions between the outer notches and the rotor accommodating hole and extends through a center of the rotor accommodating hole shifts by a predetermined angle from a line that extends through the center of the rotor accommodating hole and is orthogonal to an extending direction of the stator.

Abstract: A high-speed rotating wheel rotates at high speed by a third stepper motor which meshes with a portion of teeth of a ratchet wheel. A transmission projection of the ratchet wheel moves within an elongated hole of a transmission wheel which rotates with the movement of the hour hand. The ratchet wheel rotates at high speed, and a display wheel rotates at high speed by the high speed rotation of the ratchet wheel via a feed wheel. When normally moving the hour hand, the ratchet wheel rotates with the transmitting wheel and the portion of teeth of the ratchet wheel is made to approach the high-speed rotating wheel. When the display of the display wheel changes, the high-speed rotating wheel meshes with the portion of teeth of the ratchet wheel and rotates the ratchet wheel at high-speed. Accordingly, the date display of the display wheel can be quickly changed.

Abstract: A high-speed rotating wheel rotates at high speed by a third stepper motor which meshes with a portion of teeth of a ratchet wheel. A transmission projection of the ratchet wheel moves within an elongated hole of a transmission wheel which rotates with the movement of the hour hand. The ratchet wheel rotates at high speed, and a display wheel rotates at high speed by the high speed rotation of the ratchet wheel via a feed wheel. When normally moving the hour hand, the ratchet wheel rotates with the transmitting wheel and the portion of teeth of the ratchet wheel is made to approach the high-speed rotating wheel. When the display of the display wheel changes, the high-speed rotating wheel meshes with the portion of teeth of the ratchet wheel and rotates the ratchet wheel at high-speed. Accordingly, the date display of the display wheel can be quickly changed.

Abstract: An optical-type rotational body position detection apparatus includes a body being rotational in a predetermined angle at each predetermined time interval to cross an optical axis between fixed light emitting and detecting units, including a standard position hole on a rotational locus crossing the axis, and configured such that after rotating the body at one interval from a standard position at which the hole coincides with the axis, a periphery of the hole is positioned outside the periphery at the standard position. The apparatus further includes a restriction unit on a support to cross the axis and to permit light passing and to restrict a diameter of the passing light. The restriction unit restricts the diameter of the passing light to be smaller than a minimum distance within a positional displacement tolerable error range of the hole after the predetermined angled rotation of the body.

Abstract: An optical-type rotational body position detection apparatus includes a body being rotational in a predetermined angle at each predetermined time interval to cross an optical axis between fixed light emitting and detecting units, including a standard position hole on a rotational locus crossing the axis, and configured such that after rotating the body at one interval from a standard position at which the hole coincides with the axis, a periphery of the hole is positioned outside the periphery at the standard position. The apparatus further includes a restriction unit on a support to cross the axis and to permit light passing and to restrict a diameter of the passing light. The restriction unit restricts the diameter of the passing light to be smaller than a minimum distance within a positional displacement tolerable error range of the hole after the predetermined angled rotation of the body.

Abstract: A timepiece with a calendar function. The timepiece includes a main plate (19) has a plurality of holes (76) arranged along the outer periphery of a ring-like day indicator (26) when the same is disposed concentrically on the main plate. When positioned, the day indicator (26) is disposed substantially concentrically with the main plate (19). When a plurality of guide pins (77) are inserted into the plurality of holes (76), respectively, in the main plate 19, the guide pins (77) cooperate to come into contact with the outer periphery of the day indicator to adjust the position of the day indicator (26) in radial directions, thereby positioning the day indicator exactly concentrically with and on the main plate (19) (FIG. 18).

Abstract: The present invention relates to an illumination device. When the light from the, light emitting element is guided to the first illuminating portion of the light guide plate, the light is radiated from the whole upper surface of the first illuminating portion to illuminate the upper surface side of the light guide plate. Also, when the light from the light emitting element is guided to the second illuminating portion of the light guide plate, the light is radiated from the whole lower surface of the second illuminating portion to illuminate the lower surface side of the light guide plate. The upper and lower surface sides of the light guide plate can be excellently illuminated with one light guide plate.