Abstract: A wheelchair includes a seat frame having two transverse support rods, a foldable sunk-type seat module mounted on the seat frame and located between the two transverse support rods, a backrest frame having two upright support rods, and a foldable sunk-type backrest module mounted on the backrest frame and located between the two upright support rods. Thus, the backrest module may be mounted on and detached from the upright support rods of the backrest frame easily, rapidly and conveniently, and the seat module may be mounted on and detached from the horizontal support rods of the seat frame easily, rapidly and conveniently.

Abstract: A modularized assembly structure of a wheelchair includes two upper transverse tubes and two lower transverse tubes mounted between a pair of sided front module connecting members and a pair of sided rear module connecting members, thereby forming the main frame of the wheelchair. The front wheel and the rear wheel may be respectively mounted on the upper and lower transverse tubes which may be set at different horizontal positions and different vertical heights, so that the distance between the front wheel and the rear wheel may be adjusted arbitrarily.

Abstract: A modularized wheel chair includes two front side members and two rear side members. Two top tubes and two down tubes are respectively connected between the front and rear side members. Each of the front side members has a plurality of front positioning holes that the front wheels unit is optionally connected to desired front positioning holes between the two front side members. Each of the rear side members has a plurality of rear positioning holes that the rear wheels unit is optionally connected to desired rear positioning holes between the two front side members. The position of the front wheels unit and the rear wheels unit can be installed at desired positions so as to obtain different sizes of the wheel chairs.

Abstract: A wheel chair includes two side assemblies each include a back post with a hand grip, a seat bar connected to a lower end of the back post, an arm rest movably connected to the back post, a hanger bracket connected to a front end of the seat bar, a caster rotatably connected to a front end of the seat bar, and a rear wheel connected to a side of the side assembly. A connection device connects the back post and the arm rest, or the front end of the seat bar and the hanger bracket. The connection device has a C-shaped member fastened on the back post or the front end of the seat bar extends. A sleeve is connected to an outside of the C-shaped member and a first end of a connection tube is movably and rotatably received in the sleeve. A locking bolt extends through a close end of the sleeve and is threadedly connected to the first end of the connection tube. The arm rest or the hanger bracket is fixedly connected to a second end of the connection tube.

Abstract: A wheelchair includes a seat frame having two transverse support rods, a foldable sunk-type seat module mounted on the seat frame and located between the two transverse support rods, a backrest frame having two upright support rods, and a foldable sunk-type backrest module mounted on the backrest frame and located between the two upright support rods. Thus, the backrest module may be mounted on and detached from the upright support rods of the backrest frame easily, rapidly and conveniently, and the seat module may be mounted on and detached from the horizontal support rods of the seat frame easily, rapidly and conveniently.

Abstract: A full-function modularized assembly structure of a wheelchair includes two upper transverse tubes and two lower transverse tubes mounted between two sided front module connecting members and two sided rear module connecting members, thereby forming the main frame of the wheelchair. The front wheel and the rear wheel may be respectively mounted on the upper transverse tube and the lower transverse tube at different horizontal positions and different vertical heights, so that the distance between the front wheel and the rear wheel may be adjusted arbitrarily.

Abstract: A wheel chair includes two side assemblies each include a back post with a hand grip, a seat bar connected to a lower end of the back post, an arm rest movably connected to the back post, a hanger bracket connected to a front end of the seat bar, a caster rotatably connected to a front end of the seat bar, and a rear wheel connected to a side of the side assembly. A connection device connects the back post and the arm rest, or the front end of the seat bar and the hanger bracket. The connection device has a C-shaped member fastened on the back post or the front end of the seat bar extends. A sleeve is connected to an outside of the C-shaped member and a first end of a connection tube is movably and rotatably received in the sleeve. A locking bolt extends through a close end of the sleeve and is threadedly connected to the first end of the connection tube. The arm rest or the hanger bracket is fixedly connected to a second end of the connection tube.