Detachable electric wheelchair

摘要

A wheelchair has a chair, an electrical power device, a foot stand, and a control device. The chair has two arm rest frames, and each arm rest frame has a connection board. The electrical power device is detachably connected with the connection boards and has a holding frame, a driving device, and two rear wheels. The holding frame has two holding boards respectively connected with the connection boards by multiple securing assemblies. Each securing assembly has a holding sleeve, a connecting rod, a knob, and a spring. The holding sleeve has multiple abutting ribs. The connecting rod is mounted through the holding sleeve and has a first end and a second end selectively extending into one of the connecting holes defined in a corresponding connection board. The knob is mounted securely around the second end of the connecting rod and has multiple engaging grooves.

主权项

1. An electric wheelchair comprising:
a foldable chair comprising
a seat being foldable and having two sides;a back rest being foldable, connected with the seat, and having two sides;two arm rest frames respectively connected securely with the sides of the seat, and each arm rest frame having a connection board provided with multiple connecting holes defined in the connection board;two front wheels respectively mounted rotatably on the arm rest frames; andtwo pushing bars connected respectively with the arm rest frames and located respectively at the sides of the back rest; an electrical power device detachably connected with the chair between the arm rest frames and comprising
a holding frame connected detachably with the arm rest frames and having two sides;two holding boards mounted respectively on the sides of the holding frame and respectively connected with the connection boards of the arm rest frames by multiple securing assemblies, and each securing assembly comprising
a holding sleeve mounted securely on the holding board on which the securing assembly is mounted and having multiple abutting ribs formed longitudinally on an outer surface of the holding sleeve;a connecting rod mounted through the holding sleeve and having a first end and a second end selectively extending into one of the connecting holes in the connection board of a corresponding one of the arm rest frames;a knob mounted securely around the second end of the connecting rod, being hollow, and having
an inner surface; andmultiple engaging protrusions formed on and protruding from the inner surface of the knob to define multiple engaging grooves between the engaging protrusions, wherein the abutting ribs on the holding sleeve are selectively mounted respectively in the engaging grooves; anda spring mounted around the connecting rod and having two ends abutting respectively on the connecting rod and the holding sleeve;a driving device mounted on the holding frame; andtwo rear wheels mounted rotatably on the holding frame and driven by the driving device; a foot stand mounted detachably on the arm rest frames; and a control device detachably mounted on one of the arm rest frames.