Abstract: A seat rotating device includes a base plate, a rotating plate, and a coupling unit. The coupling unit includes a rotation link including a fixing end and a rotating end, a guide rail fixed to the base plate, the guide rail being in a linearly extending shape, a support slider movable along the guide rail, the support slider supporting the rotating end, a connection member that connects the support slider and the rotation link to each other, a lower rail, and an upper slider. The connection member is constructed to accommodate variation in distance between the rotating end and the support slider that is produced when the rotating end and the support slider move with respect to the base plate.

Abstract: A seat rotating device capable of achieving both of suppression of floating of a rotating plate from a seat slider and positioning in a front-rear direction of the rotating plate at a seating position is provided. The seat rotating device includes a seat slider including a lower rail and an upper rail, a base plate, a rotating plate including a belt anchor bracket, a coupling unit, a restriction portion, a fixing member, and a load bearing portion. The restriction portion includes an opposed portion opposed, in the front-rear direction, to a rear end of the belt anchor bracket while the rotating plate is located at the seating position and a tab located above the rear end of the belt anchor bracket while the rotating plate is located at the seating position.

Abstract: Disclosed is a gearing device for a seat including a first internally toothed gear, a second internally toothed gear, an externally toothed gear, and an eccentric member. The first internally toothed gear includes a rotation center axis. The second internally toothed gear has the rotation center axis in common with the first internally toothed gear and is rotatably supported by the first internally toothed gear. The externally toothed gear is arranged to an inner side of the first and the second internally toothed gear, to thereby mesh with the first and the second internally toothed gears. The eccentric member rotates the externally toothed gear such that a rotation center thereof follows a path around the rotation center axis, rotatably supports the externally toothed gear about the rotation center, and rotates about the rotation center axis in response to a rotational force being externally input thereto.

Abstract: A seat rotating device includes a base plate, a rotating plate, a coupling unit, and a drive unit. The coupling unit includes a link, a guide having a linearly extending shape, and a moving body that is movable along the guide and supports the rotating plate. The drive unit can move the moving body along the guide. The link includes a fixing end and a rotating end. The guide has a shape extending linearly along a diameter of a virtual circle, the virtual circle having length twice the distance between the fixing end and the rotating end as its radius, and having the fixing end as its center. The moving body moves the rotating plate along the guide while relatively rotating the rotating plate with respect to the moving body.

Abstract: Disclosed is a gearing device for a seat including a first internally toothed gear, a second internally toothed gear, an externally toothed gear, and an eccentric member. The first internally toothed gear includes a rotation center axis. The second internally toothed gear has the rotation center axis in common with the first internally toothed gear and is rotatably supported by the first internally toothed gear. The externally toothed gear is arranged to an inner side of the first and the second internally toothed gear, to thereby mesh with the first and the second internally toothed gears. The eccentric member rotates the externally toothed gear such that a rotation center thereof follows a path around the rotation center axis, rotatably supports the externally toothed gear about the rotation center, and rotates about the rotation center axis in response to a rotational force being externally input thereto.

Abstract: A vehicle seat includes a seat cushion, an ottoman, a driving unit, and a power transmission mechanism. An ottoman frame formed as a framework of the ottoman is pivotably attached to a cushion frame formed as a framework of the seat cushion. The driving unit has an output shaft capable of outputting a rotational driving force, and the ottoman frame has a pantograph mechanism that allows the ottoman to deform between an extended state and an unextended state. The power transmission mechanism has a pinion gear fixed to the output shaft, and a first sector gear meshing with the pinion gear. The first sector gear is connected to a driving link of the pantograph mechanism, to implement pivoting and deformation of the ottoman.

Abstract: A seat driving device includes a rotary motor having a rotary shaft, operation members, and clutch mechanisms. The operation members are separately arranged to respectively correspond to position adjustment mechanisms. The clutch mechanisms are separately arranged to respectively correspond to the position adjustment mechanisms. When any one of the operation members is operated, each clutch mechanism selectively connects the corresponding position adjustment mechanism to the rotary motor. In response to operation of any one of the operation members, the rotary motor is energized with the polarity corresponding to the operation direction of the operation member. Each clutch mechanism is arranged with respect to the rotary motor such that the axis of the clutch mechanism is parallel with the axis of the rotary shaft.

Abstract: A power transmission apparatus in one aspect of the present disclosure comprises at least one gear that transmits an inputted driving force to at least one output part; at least one shaft that supports the at least one gear; a displacement portion configured to be mechanically interlocked with a displacement gear among the at least one gear and displaced in association with the displacement gear; a housing that houses the at least one gear and the at least one shaft; and an abutting portion that is disposed in the housing and configured to restrict a possible displacement range of the displacement portion by abutting the displacement portion. The abutting portion is configured so as not to be displaced along with a rotation of the at least one gear and is disposed in the housing at a location spaced apart from the at least one shaft.

Abstract: A vehicle seat includes a seat cushion, an ottoman, a driving unit, and a power transmission mechanism. An ottoman frame formed as a framework of the ottoman is pivotably attached to a cushion frame formed as a framework of the seat cushion. The driving unit has an output shaft capable of outputting a rotational driving force, and the ottoman frame has a pantograph mechanism that allows the ottoman to deform between an extended state and an unextended state. The power transmission mechanism has a pinion gear fixed to the output shaft, and a first sector gear meshing with the pinion gear. The first sector gear is connected to a driving link of the pantograph mechanism, to implement pivoting and deformation of the ottoman.

Abstract: A deceleration device for a vehicle seat comprises an external gear comprising teeth with tops projecting radially outward. A tooth of the external gear comprises a straight portion and a critical cross-section located in a dedendum flank of the tooth of the external gear. The straight portion is provided in a vicinity of the critical cross-section and a thickness of the straight portion becomes linearly larger toward a root of the tooth.

Abstract: A sliding device in one aspect of the present disclosure includes a fixed rail, a movable rail, and a rail cover. The movable rail is slidable with respect to the fixed rail. The rail cover covers an outer periphery of a first end in the longitudinal direction of the fixed rail, and is slidable in the longitudinal direction. The rail cover is displaced by sliding with the movable rail when the first end in the longitudinal direction of the movable rail is displaced to protrude from the first end of the fixed rail.

Abstract: A sliding device in one aspect of the present disclosure includes a fixed rail, a movable rail, and a rail cover. The movable rail is slidable with respect to the fixed rail. The rail cover covers an outer periphery of a first end in the longitudinal direction of the fixed rail, and is slidable in the longitudinal direction. The rail cover is displaced by sliding with the movable rail when the first end in the longitudinal direction of the movable rail is displaced to protrude from the first end of the fixed rail.

Abstract: A motion conversion apparatus for a vehicle includes a fixed member including an internal gear arranged around a first axis, an input member configured to rotate about the first axis, a planetary gear including an external gear engaging with the internal gear and an output portion. The planetary gear is supported by the input member to be rotatable about a second axis arranged eccentrically relative to the first axis. In association with rotation of the input member, the planetary gear is configured to revolve around the first axis along the internal gear while self-rotating about the second axis such that the output portion performs a linear motion.

Abstract: A deceleration device comprising first and second gears that have different numbers of teeth. A cam mechanism is disposed on the same axis as the first gear, engages the first gear with the second gear in a state of eccentricity. A connecting shaft is disposed on the same axis as the first gear and is connected to the cam mechanism. A rotating body is disposed on the same axis as the second gear and is connected to the connecting shaft. When the connecting shaft is inserted into a long hole of the rotating body, the rotating body is connected to the connecting shaft in an eccentric position. The major axis of the long hole is set so as to allow the rotating body and the connecting shaft to move relative to one another along the longitudinal direction of the long hole.

Abstract: A sliding device for supporting a seat in a slidable manner includes: a fixed rail; a movable rail; a screw rod extending along a central axis parallel to a longitudinal axis of the movable rail; a nut portion attached to the fixed rail such that the nut portion is limited in displacement along the longitudinal axis relative to the fixed rail; a first support portion supporting one end of an extension axis of the screw rod in a rotatable manner such that the first support portion limits the one end from moving along the longitudinal axis; and a second support portion supporting the other end of the extension axis of the screw rod in a rotatable manner such that the second support portion limits the other end from moving beyond a predetermined length along the longitudinal axis.

Abstract: A deceleration device comprising first and second gears that have different numbers of teeth. A cam mechanism is disposed on the same axis as the first gear, engages the first gear with the second gear in a state of eccentricity. A connecting shaft is disposed on the same axis as the first gear and is connected to the cam mechanism. A rotating body is disposed on the same axis as the second gear and is connected to the connecting shaft. When the connecting shaft is inserted into a long hole of the rotating body, the rotating body is connected to the connecting shaft in an eccentric position. The major axis of the long hole is set so as to allow the rotating body and the connecting shaft to move relative to one another along the longitudinal direction of the long hole.

Abstract: A deceleration device for a vehicle seat comprises an external gear comprising teeth with tops projecting radially outward. A tooth of the external gear comprises a straight portion and a critical cross-section located in a dedendum flank of the tooth of the external gear. The straight portion is provided in a vicinity of the critical cross-section and a thickness of the straight portion becomes linearly larger toward a root of the tooth.

Abstract: A power transmission apparatus in one aspect of the present disclosure comprises at least one gear that transmits an inputted driving force to at least one output part; at least one shaft that supports the at least one gear; a displacement portion configured to be mechanically interlocked with a displacement gear among the at least one gear and displaced in association with the displacement gear; a housing that houses the at least one gear and the at least one shaft; and an abutting portion that is disposed in the housing and configured to restrict a possible displacement range of the displacement portion by abutting the displacement portion. The abutting portion is configured so as not to be displaced along with a rotation of the at least one gear and is disposed in the housing at a location spaced apart from the at least one shaft.

Abstract: A seat driving device includes a rotary motor having a rotary shaft, operation members, and clutch mechanisms. The operation members are separately arranged to respectively correspond to position adjustment mechanisms. The clutch mechanisms are separately arranged to respectively correspond to the position adjustment mechanisms. When any one of the operation members is operated, each clutch mechanism selectively connects the corresponding position adjustment mechanism to the rotary motor. In response to operation of any one of the operation members, the rotary motor is energized with the polarity corresponding to the operation direction of the operation member. Each clutch mechanism is arranged with respect to the rotary motor such that the axis of the clutch mechanism is parallel with the axis of the rotary shaft.

Abstract: A seat driving apparatus includes: a tubular member into which an output shaft is fitted, into which an input shaft is fitted, and which includes a tubular portion and a pressing piece; a first biasing member biasing the tubular member in an axial line direction toward the input shaft; an intermediary member into which the tubular portion is loosely inserted and which is turnable about an axial line extending in a direction different from a direction of an axial line of the tubular member; a cam member supported turnably around an axial line extending in a direction different from the directions of the axial lines of the tubular member and the intermediary member, pressing the pressing piece via the intermediary member, and allowing the input shaft to fit into the tubular member; and a second biasing member biasing the cam member, wherein a counterface of the intermediary member pressing the pressing piece includes a curved surface.