Us Patent Ideas

Wheelchair Patent Ideas Search

Wheelchair

Abstract
The object of the present invention is to provide a wheelchair whose width can be adjusted. Said wheelchair having a pair of side frames connected to each other by one or more X-frame(s) (11) wherein said X-frame (11) consists of a pair of rotatable arms connected rotatably to each other at their respective centers, the lower ends of each rotatable arm being fixed to said side frame, and the fixing position of each rotatable arm to said side frame is vertically adjustable. In said wheelchair (1), when said rotatable arm(s) (11A,11A) of said X-frames(s) (11) rotate around the centers C of said rotatable arms (11A,11A), the width between said side frames (3,3) can be adjusted. When said rotatable arm(s) (11A,11A) are respectively rotated, the height of said X-frame(s) (11) is changed, however, since the lower part(s) of said X-frame(s) (11) is(are) fixed to said left and right side frames (3,3), and are vertically adjustable, said left and right side frames (3,3) can be connected by said X-frames(s) (11) to correspond to the change of the height of said X-frame(s) (11).

--------------------------------------------------------------------------------
Inventors: Sato, Hisayoshi; (Nagoya, JP)
Correspondence Name and Address: Donald S. Dowden
Cooper & Dunham LLP
1185 Avenue of the Americas
New York
NY
10036
US


Assignee Name and Adress: MiKi Co., Ltd.


Serial No.: 841061
Series Code: 10
Filed: May 7, 2004

U.S. Current Class: 280/793
U.S. Class at Publication: 280/793
Intern'l Class: B62D 021/06

 

--------------------------------------------------------------------------------

Claims

--------------------------------------------------------------------------------

1. A wheelchair having a pair of side frames connected to each other by one or more X-frame(s) wherein said X-frame consists of a pair of rotatable arms connected rotatably to each other at their respective centers, the lower ends of each rotatable arm being fixed to said side frames, the position at which each rotatable arm can be fixed to said side frame, being vertically adjustable.

2. A wheelchair in accordance with claim 1, wherein the lower part of each rotatable arm is rotatably connected to the lower part of each side frame by an axis, being rotatably inserted into one of the holes which are vertically arranged in the lower part of each side frame.

3. A wheelchair in accordance with claim 1, wherein a link arm is positioned between the upper part of each rotatable arm and each side frame at least in an X-frame.

4. A wheelchair in accordance with claim 3, wherein each link arm is rotatatably connected to each side frame by an axis, being rotatably inserted into one of a plural number of holes which are vertically arranged in each side frame.
--------------------------------------------------------------------------------

Description

--------------------------------------------------------------------------------

FIELD OF THE INVENTION

[0001] The present invention relates to a wheelchair with an adjustable width.

BACKGROUND OF THE INVENTION

[0002] The wheelchair is used to move the disabled and can be moved without human assistance by the user by grasping the main wheels (91) or the hand rims attached to the main wheels (91) by hand to turn the main wheels as shown in FIG. 10.

RRIOR ART

[0003] Until now, wheelchairs have not been width adjustable, which makes it difficult for the user to turn the main wheels by hand in the case where the width between a main pair of wheels (91) is too wide or too narrow for the user.

DISCLOSURE OF THE INVENTION

[0004] The present invention provides a wheelchair (1) having a pair of side frames (3, 3) connected by one or more X-frame (s) (11, 12), wherein each said X-frame (11, 12) consists of a pair of rotatable arms (11A, 11A, 12A, 12A) connected rotatably to each other at their respective centers and the lower ends of each rotatable arm (11A, 11A, 12A, 12A) are fixed to said side frames (3, 3), being vertically adjustable.

[0005] It is preferable that lower part of each rotatable arm (11A, 11A, 12A, 12A) is connected to lower part of each side frame by an axis (26) being rotatably inserted into one of holes which are vertically arranged in the lower part of each side frame, and further, it is preferable that a link arm (30, 30) be positioned between the upper part of each rotatable arm and each side frame at least in a X-frame, and said link arm (30, 30) be vertically adjustable on each side frame side. In this case, it is preferable that each link arm is rotatably connected to each side frame by an axis (31, 32) being rotatably inserted into one of a plural number of holes (14A, 14B, 14C) which are vertically arranged in each side frame.

[0006] In the present invention, a pair of side frames (3,3) are connected to each other by one or more X-frame(s) (11, 12), and when a pair of rotatable arms (11A, 11A, 12A, 12A) of said X-frame(s) (11, 12) are rotated respectively around the centers of said rotatable arms (11A, 11A, 12A, 12A), the width of said X-frames (11, 12) and the width between a pair of side frames (3, 3) can be adjusted as shown in FIG. 8. At this point, the height(s) of said X-frame(s) (11, 12) may change, however, since the lower end of each rotatable arm (11A, 11A, 12A, 12A) is fixed to said side frame (3, 3) to be vertically adjustable, a pair of side frames (3,3) can be connected to correspond to the height change(s) of said X-frame(s).

[0007] The lower part of each rotatable arm (11A, 11A, 12A, 12A) is rotatably connected to the lower part of each side frame (3, 3) by an axis (26), and said axis (26) is rotatably inserted into and supported by one of a plural number of holes (13A, 13B, 13C) which are vertically arranged in the lower part of each side frame (3, 3), so that the most suitable one of said holes (13A, 13B, 13C) is selected and said axis (26) is inserted into said selected hole, and the width between a pair of side frame (3,3), in other words, the width of the wheelchair can be adjusted stepwise.

[0008] In the case where a link arm (30) is positioned between the upper part of each rotatable arm (11A, 11A, 12A, 12A) and each side frame (3,3) at least in a X-frame and said link arm (30) is fixed to said side frame (3,3) to be vertically adjustable, the position at which said link arm (30) fixes to said side frame (3,3) can be adjusted to correspond to the width between a pair of side frames (3,3), reinforcing said X-frame(s) (11,12).

[0009] Each said link arm (30) is rotatably connected to each side-frame (3) by an axis (32), and said axis is rotatably inserted into one of a plural number of holes (14A, 14B, 14C) which are vertically arranged in each side frame (3), so that the most suitable one of said holes (14A, 14B, 14C) is selected and said axis (32) is inserted into said selected hole, and fixing the position of said link in said selected hole, said link arm (30) can thus be adjusted stepwise.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIGS. 1 to 9 show an embodiment of the present invention.

[0011] FIG. 1 is a side view of the wheel chair.

[0012] FIG. 2 is a front view of the wheel chair.

[0013] FIG. 3 is a top view of the wheel chair.

[0014] FIG. 4 is a descriptive perspective view of the sheet cloth.

[0015] FIG. 5 is a perspective view of the X-frame.

[0016] FIG. 6 is a perspective view that illustrates the connection of the X-frame to the side frame.

[0017] FIG. 7 is a perspective view that illustrates the connection of the link arm.

[0018] FIG. 8 is a descriptive front view of the width adjusting mechanism.

[0019] FIG. 9 is a descriptive front view of the folding wheel chair.

[0020] FIG. 10 is a descriptive front view of a conventional wheel chair.

DEFINITION OF REFERENCE CHARACTERS

[0021]

1 1 Wheel chair 3 Side frame 11A, 11A, 12A, 12A Rotatable arms 13A, 13B, 13C, 14A, 14B, 14C Axis holes 26, 32 Axes 30 Link arm

DETAILED DESCRIPTION AND PREFERED EMBODIMENT

[0022] FIGS. 1 to 8 relates to an embodiment of the present invention. Referring to the figures, a wheelchair (1) shown in FIGS. 1 to 3 has a chair body (2) comprising a pair of left and right side frames (3,3) and each frame (3, 3) comprises left and right seat beams (4,4), front and rear leg posts (5,6), left and right arm rests (7,7), left and right back beams (8,8), left and right foot rest supporting beams (9,9) and left and right lower beams (10,10), and said left and right side frames (3,3) are connected to each other by a pair of front and rear X-frames (11,12).

[0023] A pair of left and right main wheels (15,15) are attached to said left and right rear leg posts (6,6) at the side of said chair body (2), and a pair of left and right casters (47) are attached to said left and right front leg posts (5,5). Further, a seat cloth (19) is arranged between said left and right seat beams (4, 4), fixing both sides of said seat cloth to left right upper side beams (17.17) connecting upper ends of said front and rear X-frames (11,12), a back cloth (21, 21) is arranged between said left and right back beams (8,8) fixing both sides of said back cloth (21,21) to said left and right back beams (8,8), and a pair of left and right foot rests (46) are respectively attached to said left and right foot rest supporting beam (9,9) to be horizontally and vertically adjustable.

[0024] Further, armrest pads (23) are respectively attached to said left and right armrests (7,7) and the upper parts of said left and right back beams (8,8) are respectively bent backwards to form left and right handles (45,45).

[0025] Said seat cloth (19, 19) and said back cloth (21,21) consist of separate pairs of cloths (19,19), (21,21) affixed to each other by face fasteners (20, 22) as shown in FIGS. 3 and 4. Said cloth is desirably made of a strong synthetic fiber cloth such as a polyamide or polyester fiber type.

[0026] Said front and rear X-frames (11,12) connecting said left and right side frames (3,3) respectively consist of a pair of rotatable arms (11A, 11A, 12A, 12A), connected rotatably to each other at their respective centers C, and the left and right upper ends of said front and rear X-frames (11,12) are respectively connected by the left and right upper side beam pipes (17,17), and the left and right lower ends of said front and rear X-frames (11,12) are respectively connected by left and right lower side beam pipes (18,18), said upper and lower side beam pipes (17,17), (18,18) are respectively welded to the upper ends and lower ends of said front and rear X-frames (11,12) as shown in FIG. 5.

[0027] A front and rear pair of square pillar-type side beam brackets (13, 13) are welded to said left and right lower beams (10,10), and a plural number (3) of holes (13A,13B,13C) are formed vertically in each side beam bracket (13,13) as shown in FIG. 6. The fixing holes (13D,13D) are respectively formed vertically in the front or rear side beam brackets (13,13), penetrating from upper end to lower end of said side bean brackets (13,13), and a front and rear pair of beam supporting members (16,16) project respectively from the seat beams (4,4) of each side frame (3,3). As shown in FIG. 7, square pillar-type link arm brackets (14,14) are respectively welded to said left and right rear leg posts (6,6), and a plural number (3) of screw holes (14A,14B,14C) are formed in suitable positions of each link arm bracket (14) along the rotational focus of said rear rotatable arms (12A, 12A).

[0028] To connect said side frames (3,3), using said X-frames (11,12), said lower side beams (18,18) are respectively fitted into one of holes (13A,13B,13C) of said side beam brackets (13,13), and, if holes such as holes (13A,13A) are selected, said axes (26,26) will respectively penetrate said holes (13A,13A) and said lower side beams (18,18), thus supporting said lower side beams (18,18). In this case, said upper side beams (17, 17) are respectively supported on said beam supporting members (16,16). Said X-frames (11,12) are respectively connected to left and right side frames (3,3) as described above, and then fixing bars (27,27) are respectively set into said fixing holes (13D,13D) of said side beam brackets (13,13) and fixing holes (26A,26A) of said axes (26) as shown FIG. 6. One end of said axis (26) is bent to be a handle which eases the positional adjustment of said axis (26) by limiting over-penetration of said axis (26).

[0029] Said left and right side frames (3,3) are connected to each by said front and rear X-frames (11,12) as described above, and then link arms (30,30) are respectively positioned between the upper parts of said rotatable arms (12A,12A), and said link arm brackets (14,14) of said rear leg posts (6,6), and fixed by bolts (31,32) as axes, being screwed into the most appropriate hole (14A) from among three holes (14A,14B,14C), and said left and right side frames (3,3) and said X-frames (11,12) are firmly connected to each other with said link arms (30, 30) as shown in FIG. 7.

[0030] To adjust the width of said wheel chair (1) of this embodiment, said face fastners (20,22) of said back cloths (19,19) and said seat cloths (21,21) are respectively peeled off each other, and then said fixing bars (27,27) are respectively pulled out of said fixing holes (13D,13D). Further, said axes (26) are respectively pulled out of said holes (13A,13A) and said lower side beams (18,18), and further, by removing said bolts (32) connecting said link arms (30) to said link arm bracket (14), the connections between said link arms (30) and said side frames (3,3) are respectively disengazed. In this state, said rotatable arms (11A, 11A, 12A,12A) of said X-frames (11,12) are respectively rotated around the centers C of said rotatable arms (11A,11A,12A,12A) to adjust the widths of said X-frames (11,12) moving said side frames (3, 3) in a crosswise direction, adjusting the width of said wheel chair (1).

[0031] By reducing the widths of said X-frames (11,12), the heights of said X-frames (11,12) are enlarged, while by extending the widths of said X-frames (11,12), the heights of said X-frames (11,12) are reduced, and each lower side beam (18) of said X-frame (11,12) is fitted to the most appropriate hole from among three holes (13A,13B,13C) and each axis (26) is inserted into said selected hole and said lower side beam (18, 18) to support said X-frame (11,12).

[0032] Said X-frames (11,12) are respectively connected to said side frames (3,3) as described above and then said fixing bars (27,27) are respectively inserted into said fixing holes (13D,13D), (26A,26A), and further, said link arms (30,30) are respectively positioned between the upper parts of said rotatably arms (12A,12A) and said link arm brackets (14,14) of said rear leg posts (6,6), and said bolts (31,32) are respectively screwed into said screw holes (12B,12B), and the most appropriate screw hole from among three screw holes (14A,14B,14C) of each said link arm bracket (14,14) to fix said link arms (30,30).

[0033] The width between left and right frames (3,3) is adjusted as described above, and said seat cloths (19,19) and back cloths (21,21) are again affixed to each other with face fasteners (20,22) to provide a seat with a back.

[0034] In this embodiment, said side beam bracket (13) has three holes (13A,13B,13C) and said link arm bracket (14) has three screw holes (14A,14B,14C), so that the width of said wheel chair can be adjusted in three stages. In the present invention, two, or four and more holes and screw holes may be prepared, and one X-frame, or three and more X-frames may be prepared. Said axes (26, 31, 32) do not always need to be pivots or bolts, however, in the case they are as such, said lower side beams (18,18) and said link arms (30,30) are rotatable around axes, enabling said wheelchair (1) are foldable. The width of said wheel chair of the present invention can be adjusted so that each individual user can easily achieve most comfortable width, and it is not necessary for a maker to prepare various kinds of wheelchair having various widths.

Related Patent
Patent NO. Wheelchair Patent Title
20060061067 Manually operable standing wheelchair
20060055550 Wheelchair and alarm therefor
20060055143 Rear wheel mount and optional suspension for wheelchair
20060045686 Mechanism for insertion of a wheelchair into a car
20060038360 Stair-climbing wheelchair carrier
20060032417 Modular tube and table retrofitable to a wheelchair
20060027619 Driver accessible wheelchair carrier
20060022504 Air fluidized granular wound care wheelchair overlay
20060021806 Obstacle traversing wheelchair
20060018743 Wheelchair access system with stacking platform
20060016651 Shock absorber of a seat of a wheelchair
20060016648 Shock absorber of a seat of a wheelchair
20060012147 Stand-up wheelchair with gearing down of the stand-up operation
20060012146 Wheelchair with foot rest
20060011421 Automatic wheelchair brake system and wheelchair including same
20060000664 Motorized apparatus for towing a wheelchair
20050279540 Adjustable wheelchair
20050279539 Electrical wheelchair with an electrical seat-rotating device
20050275322 Wheelchair accommodating system
20050275190 Wheelchair propulsion device
20050273920 Waste handling apparatus for wheelchair
20050269798 Device for securing a wheelchair, scooter, or transportable equipment
20050264073 Dynamic seat support for a wheelchair
20050257966 Adjustable anti-tip wheels for power wheelchair
 
 
Adjustable Bed
Air Curtain
Air Purifier
Auto Lift
Badge Holder
Balance
Blinds
Blister Packaging
Cable Lock
Cable Ties
Carpet
Caster Wheel
CCtv Camera
Cell Phone
Computer Desk
Computer Rack
Conference System
Conference Table
Copier
Counterfeit Detector
Credit Card
Dental Care
Desiccant
Digital Video Recorder
Domain Names
Dome Camera
Double Sided Tape
Electric Hoist
Electric Wheel Chair
Ethernet Switch
Exit Sign
Fire Extinguisher
First Aid Kit
Flow Meter
Forklift Truck
Garden Light
Garden Umbrella
Geogrid
Glue Gun
Hair Treatment
Hand Dryer
Health Care
Hearing Aid
Heat Shrink Tube
Infrared Camera
Infrared Thermometer
Ink
Ink Refill
Inkjet Cartridge
Insurance
Investment Casting
Juice
Juice Extractor
Kitchen Faucet
Laminate Flooring
Lanyard
Laptop
Laser Engraving Machine
Latex Gloves
LED Display
Linear Bearing
Massage Chair
Massage Table
Mattress
Mattress Pad
Mechanical Balance
Memory Foam Pillow
Microscope Camera
Mini Flashlight
Modem Card
Nitrogen Generator
Office Chair
Office Furniture
Pallet
Paper Shredder
Patch Cord
PCB
Personal Care
Photo Paper
Portable Vacuum Cleaner
Power Cord
Powered Wheelchair
Printed Circuit Board
Printed Tape
Printer Ribbon
Printing Machine
Projector
Radiant Heat
Radiant Heating
Rechargeable Flashlight
Rewinding Machine
Roll Label
Safety Vest
Security Door
Self-adhesive Label
Shopping Cart
Skin Care Product
Skin Cream
Spiral Staircase
Stereo Microscope
Storage Box
Storage Racks
Temperature Controller
Terminal Blocks
Thermocouple
Toner Cartridge
Towel Dispenser
Treadmill
Venetian Blind
VoIP Phone
Walkie Talkie
Water Filter
Wheel Chair
Wheelchair
Wire Shelving
Wood Flooring
Wristbands
Quick Index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z