A single-stage gear reduction output mechanism for an automotive seat assembly including a gear housing bracket, gear housing, axle shaft, eccentric, and first and second gears. The axle shaft extends through the eccentric with a slip fit, the first gear rotates with the axle shaft, and the second gear is carried on a first bearing surface of the eccentric and meshingly engages the first gear in a planetary arrangement. A locking plate including first, second, and third slot cutouts is disposed within the gear housing. A support pin extends from the gear housing through the first slot cutout and a second bearing surface of the eccentric extends through the second slot cutout to support the locking plate and limit its movement along a lateral axis. The second gear includes a first pin that extends through the third slot cutout to prevent the first gear from back-driving the second gear.

A vehicle seat frame includes a pair of side frames, a pair of cylindrical collar members, a pair of link members, and a pipe member coaxially secured at end portions to the collar members. At least one of the collar members is substantially equal in outer diameter to the pipe member. A contact surface portion having a reduced outer diameter is formed in an end portion of a first member, which is brought into contact with a second member. The first member is one of the pipe member and the collar member that is substantially equal in outer diameter to the pipe member, and the second member is the other one of them. The first member and the second member are secured to each other by welding, with the contact surface portion kept in contact with an inner peripheral portion of the second member.

Provided is a vehicle seat that can absorb energy with a link while maintaining engagement of gears in a lifting device. One embodiment of the present disclosure is the vehicle seat including a seat cushion, a cushion frame supporting the seat cushion, and the lifting device configured to raise and lower at least a portion of the seat cushion. The lifting device includes a pinion gear held by the cushion frame, a sector gear engaged with the pinion gear, and the link to which the sector gear is fixed and which is rotatably coupled to the cushion frame. The link is made of a material with a lower yield stress than a material forming the sector gear.

A vehicle seat includes a seat frame, a bushing having a shape of a hollow cylinder and a pipe. The pipe is fitted to the bushing and attached to the seat frame. The pipe includes a body portion having a fitting diameter different from a fitting diameter of the bushing and a fitting portion formed at an end in an axial direction of the body portion and fitted to an inner periphery or an outer periphery of the bushing. The fitting portion is formed in a diameter-reduced or diameter-increased hollow cylindrical shape that is fitted to the inner periphery or the outer periphery of the bushing.

A seat drive device is provided with: a single rotary motor; a plurality of operating members, which are arranged to correspond to a plurality of positioning mechanisms; a plurality of tubular members, which are arranged to correspond to the positioning mechanisms and selectively connect an output shaft to the positioning mechanism corresponding to the operating member operated with the operation of any one of the operating members and input shafts rotated by the rotary motor; and a single switch, which passes an electric current through the rotary motor with a polarity corresponding to the direction of the operation with the operation of any one of the operating members.

A single-stage gear reduction output mechanism for an automotive seat assembly including a gear housing bracket, gear housing, axle shaft, eccentric, and first and second gears. The axle shaft extends through the eccentric with a slip fit, the first gear rotates with the axle shaft, and the second gear is carried on a first bearing surface of the eccentric and meshingly engages the first gear in a planetary arrangement. A locking plate including first, second, and third slot cutouts is disposed within the gear housing. A support pin extends from the gear housing through the first slot cutout and a second bearing surface of the eccentric extends through the second slot cutout to support the locking plate and limit its movement along a lateral axis. The second gear includes a first pin that extends through the third slot cutout to prevent the first gear from back-driving the second gear.

A single-stage gear reduction output mechanism for an automotive seat assembly includes a gear housing bracket, gear housing, axle shaft, eccentric, and first and second gears. The axle shaft extends through the eccentric with a slip fit, the first gear rotates with the axle shaft, and the second gear is carried on a first bearing surface of the eccentric and meshingly engages the first gear in a planetary arrangement. The second gear includes an external flange with at least two guide holes. First and second support pins that are rigidly fixed in place relative to the axle shaft extend through the two guide holes in the external flange of the second gear. Forces acting at the interfaces between the first and second support pins and the two guide holes and between the eccentric and the second gear prevent the first gear from back-driving rotation of the second gear.

A vehicle seating assembly includes a seat, a seatback, a track assembly, a front anchor, a rear anchor, and a first gear. The seatback is coupled to the seat. The seatback is pivotable relative to the seat. The track assembly is configured to couple the seat to a floor of a vehicle. The rear anchor is coupled to the seat and configured to engage with the track assembly. The front anchor is coupled to the seat and configured to engage with the track assembly. A position of the seat relative to the front anchor and the second anchor is adjustable. The first gear extends between the front anchor and the seat. The first gear defines a guide slot therein that receives a guide pin. Movement of the first gear adjusts a position of a front region of the seat relative to a rear region of the seat.

A vehicle seat frame includes a pair of side frames, a pair of cylindrical collar members, a pair of link members, and a pipe member coaxially secured at end portions to the collar members. At least one of the collar members is substantially equal in outer diameter to the pipe member. A contact surface portion having a reduced outer diameter is formed in an end portion of a first member, which is brought into contact with a second member. The first member is one of the pipe member and the collar member that is substantially equal in outer diameter to the pipe member, and the second member is the other one of them. The first member and the second member are secured to each other by welding, with the contact surface portion kept in contact with an inner peripheral portion of the second member.

Disclosed is a seat adjustment apparatus for a mobility vehicle, in which a seat cushion slides in a forward/rearward direction while moving upward or downward when the seat cushion is tilted, thereby allowing an occupant to take a stable posture. In one aspect, the seat apparatus comprises 1) a fixing bracket fixed to a floor surface; 2) a setting bracket disposed above the fixing bracket and connected to a back frame so that the back frame is rotatable; 3) a guide unit disposed at a front end of the fixing bracket and a front end of the setting bracket; 4) a guide part disposed at a rear end of the fixing bracket and a rear end of the setting bracket; and 5) a drive unit connected to the guide unit.