A seat assembly for a conveyance, such as a wheelchair, that allows the user to set the recline angle of the seat back at a seating position, fold the seat back down to a folded position and back up to the seating position, such that the seat back is returned to the seating position at the user selected recline angle R unless the recline angle is adjusted by the user. The user selected recline angle R is not disturbed by folding the seat back from the seating position, to the folded position 106, and back to the seating position.

A multifunction mobility device includes a frame that includes a seat member, a first wheeled leg ember coupled to a first side of the seat member and a second wheeled leg member coupled to a second side of the seat member. The first wheeled leg member and the second wheeled leg member each includes an upper leg portion pivotally coupled to the seat member at a distal end and defining an upper arm recess, and a lower leg portion pivotally coupled to the upper leg portion, the upper leg portion and the lower leg portion being collapsible into a collapsed transport and storage mode where the upper leg portion is pivoted relative to the lower leg portion such that the lower leg portion nests into the upper arm recess.

Embodiments of the present disclosure provide a collapsible wheelchair, including: a movable chassis; a chair; a chair backrest; at least one first folding mechanism, installed between the movable chassis and the chair; and at least one second folding mechanism, connected between the chair and the chair backrest; where, the at least one first folding mechanism and the at least one second folding mechanism are connected in series and both have a four-rod linkage structure, and when the collapsible wheelchair is switched from a folded state to an open state or from the open state to the folded state, the at least one first folding mechanism and the at least one second folding mechanism are configured to move simultaneously. The collapsible wheelchair provided by the present disclosure is convenient in terms of the operation and easy to operate.

A vehicle is provided, including a chassis, a seat, and a support assembly; two ends of the support assembly are rotatably connected with the chassis and the seat, respectively; the support assembly drives the seat to be folded or unfolded; the seat is disposed spaced apart from the chassis when it is unfolded; the seat is attached to the chassis when it is folded; the chassis includes a first chassis frame and a second chassis frame, the first chassis frame is slid relative to the second chassis frame to retract or extend the chassis; the first chassis frame and the second chassis frame are adjacent when the chassis is extended; the first chassis frame and the second chassis frame are partially overlapped when the chassis is retracted; the chassis is retracted or extended while the seat is folded or unfolded.

A vehicle includes front and rear wheels, a base portion, an occupant supporting portion, and a movement mechanism. The base portion includes a front frame supporting the front wheel and a rear frame supporting the rear wheel, and changes a wheelbase as a result of relative movement between the front frame and the rear frame. The occupant support portion includes a support surface. A vertical position of the support surface changes in conjunction with the relative movement between the front frame and the rear frame when the wheelbase changes. The movement mechanism moves the occupant support portion with respect to the base portion so as to change the vertical position of the support surface.

A personal mobility system with multiple adjustments is presented. The personal mobility system may comprise one or more elastic stabilizer mechanisms. The adjustments may comprise a telescoping adjustment system for multiple handles, to adjust height and position of handles. The personal mobility system presents handles at a variety of positions, and of different types, to assist a user in moving from sitting to standing to walking, and to and from other positions, and presents a seat. The personal mobility system with elastic stabilizer mechanisms stabilizes the system against tipping over, improving user safety by reducing the occurrence of tips and falls. The elastic stabilizer mechanisms may be engaged by all handles and grip surfaces, or by a subset thereof, of the personal mobility system when a user begins to tip. The personal mobility system presents improvements in folding, convenience, and useability.