A system may include a seat assembly. The seat assembly may include a seat base, a seat portion mounted to the seat base, and an armrest assembly configured to be in an up position or a down position. The armrest assembly may include a handle operable by a user to lock or unlock at least one functionality of at least one adjustable seat assembly feature. Operation of the handle may be configured at least to: unlock the at least one functionality of at least one adjustable seat assembly feature while locking the armrest assembly from moving between the up position and the down position.

The vehicle seat includes: an adjustment position selecting means for selecting an adjustment position of each part of the seat corresponding to the build of the occupant; a seat position adjusting means for the occupant to manually adjust a position of each part of the seat; and a seat position detecting means for detecting a position of each part of the seat. Build information selected with the adjustment position selecting means and positional information detected with the seat position detecting means are transmitted to an electronic control unit provided in the vehicle by wireless communication or wired communication. In the electronic control unit, proper positional information of each part of the seat estimated based on the build information and the positional information are checked against each other. When both pieces of information agree with each other, the occupant is notified of the agreement through a notifying means.

The vehicle seat includes: an adjustment position selecting means for selecting an adjustment position of each part of the seat corresponding to the build of the occupant; a seat position adjusting means for the occupant to manually adjust a position of each part of the seat; and a seat position detecting means for detecting a position of each part of the seat. Build information selected with the adjustment position selecting means and positional information detected with the seat position detecting means are transmitted to an electronic control unit provided in the vehicle by wireless communication or wired communication. In the electronic control unit, proper positional information of each part of the seat estimated based on the build information and the positional information are checked against each other. When both pieces of information agree with each other, the occupant is notified of the agreement through a notifying means.

The four wheel vehicle uses an electric motor (142) for driving the vehicle and a battery unit (160) for supplying electric power to the electric motor. The lower chassis (5) of the vehicle includes a pair of front side frames (10) extending linearly in a fore and aft direction with an upward slant and a progressively increasing lateral mutual spacing from a front part thereof to a rear part thereof and a plurality of cross members (14, 16, 18) connecting the front side frames to each other. The battery unit is positioned between the two front side frames such that the battery unit overlaps with the front side frames in side view. Thereby, the battery unit can be effectively protected from side impacts.

The four wheel vehicle uses an electric motor (142) for driving the vehicle and a battery unit (160) for supplying electric power to the electric motor. The lower chassis (5) of the vehicle includes a pair of front side frames (10) extending linearly in a fore and aft direction with an upward slant and a progressively increasing lateral mutual spacing from a front part thereof to a rear part thereof and a plurality of cross members (14, 16, 18) connecting the front side frames to each other. The battery unit is positioned between the two front side frames such that the battery unit overlaps with the front side frames in side view. Thereby, the battery unit can be effectively protected from side impacts.

The four wheel vehicle uses an electric motor (142) for driving the vehicle and a battery unit (160) for supplying electric power to the electric motor. The lower chassis (5) of the vehicle includes a pair of front side frames (10) extending linearly in a fore and aft direction with an upward slant and a progressively increasing lateral mutual spacing from a front part thereof to a rear part thereof, a pair of rear side frames (12) connected to rear ends of the respective front side frames, and extending linearly in a fore and aft direction with an upward slant from a front part thereof to a rear part thereof in continuation of the corresponding front side frames in a mutually parallel relationship, and a plurality of cross members (14, 16, 18, 20, 22) connecting the side frames to each other.

The four wheel vehicle uses an electric motor (142) for driving the vehicle and a battery unit (160) for supplying electric power to the electric motor. The lower chassis (5) of the vehicle includes a pair of front side frames (10) extending linearly in a fore and aft direction with an upward slant and a progressively increasing lateral mutual spacing from a front part thereof to a rear part thereof, a pair of rear side frames (12) connected to rear ends of the respective front side frames, and extending linearly in a fore and aft direction with an upward slant from a front part thereof to a rear part thereof in continuation of the corresponding front side frames in a mutually parallel relationship, and a plurality of cross members (14, 16, 18, 20, 22) connecting the side frames to each other.

In a seat reclining device, a seatback frame forming a skeleton of a seatback is coupled to a seat cushion frame to be rotatable about a shaft with respect to the seat cushion frame. One end portion of a first sliding bracket is rotatably coupled to a middle portion of the seatback frame by a driving unit. The other end portion of the first sliding bracket extends toward a vehicle body located behind the seatback. A second sliding bracket is mounted on the vehicle body located behind the seatback and extends toward the first sliding bracket in a front and rear longitudinal direction to be connected to the first sliding bracket. The second sliding bracket is configured to guide a sliding movement of the first sliding bracket while the first sliding bracket is being rotated.

In a seat reclining device, a seatback frame forming a skeleton of a seatback is coupled to a seat cushion frame to be rotatable about a shaft with respect to the seat cushion frame. One end portion of a first sliding bracket is rotatably coupled to a middle portion of the seatback frame by a driving unit. The other end portion of the first sliding bracket extends toward a vehicle body located behind the seatback. A second sliding bracket is mounted on the vehicle body located behind the seatback and extends toward the first sliding bracket in a front and rear longitudinal direction to be connected to the first sliding bracket. The second sliding bracket is configured to guide a sliding movement of the first sliding bracket while the first sliding bracket is being rotated.

An automobile seat includes a right seat, a center seat, and a left seat. The center seat includes a center seat cushion and a center seat back having one end rotatably supported for reclining to the side of the center seat cushion and raising therefrom. A belt is attached to the center seat back, while being grasped by a hand of a passenger for reclining to the side of the center seat cushion to be brought into abutment on the skin of the seat cushion. The thus configured automobile seat reduces fricative sound generated by collision and friction between the center seat back and the center seat cushion owing to movement up and down of the automobile in the reclined state, resulting in alleviated discomfort given to the passenger.