Wheel chair abstract
A wheel chair assembly includes two identical side assemblies each
of which has a front part and a rear part and a top link and a low
link are respectively inserted in the horizontal fittings on the
front part and the rear part. A pivotable device is pivotally connected
between the top links and the low links of the two side assemblies.
A hanger bracket and a caster are respectively connected to each
of the front part. The rear parts each have a plurality of holes
so that the shaft of the rear wheel is inserted in one of the holes.
Wheel chair claims
What is claimed is:
1. A wheel chair assembly comprising: two identical side assemblies
and each having a front part, a rear part, a top link and a low
link, the front part having two first horizontal fittings for the
top link and the low link inserted therein respectively, a hanger
bracket connected to a top of the front part and a footplate connected
to a lower end of the hanger bracket, a caster connected to the
front part; the rear part having two second horizontal fittings
for two the other ends of the top link and the low link respectively
inserted therein, a handle connected to a top of the rear part,
a plurality of holes defined in the rear part; a pivotable device
pivotably connected between the two side assemblies, and two rear
wheels each having a shaft which is inserted in one of the holes
in each of the rear parts.
2. The wheel chair assembly as claimed in claim 1, wherein the
pivotable device includes two H-shaped frames which are pivotably
connected with each other at two respective intermediate points
thereof.
3. The wheel chair assembly as claimed in claim 2, wherein each
of the two H-shaped frames has a tube at a first end thereof and
the low link passes through the tube, a rod connected to a second
end of each of the two H-shaped frames and each of the two top links
has two retaining members which are engaged with the two respective
rods of the two H-shaped frames.
4. The wheel chair assembly as claimed in claim 1 further comprising
screws extending through each of the first horizontal fittings and
the second horizontal fittings to fix the top links and the low
links in the first horizontal fittings and the second horizontal
fittings.
Wheel chair description
FIELD OF THE INVENTION
[0001] The present invention relates to a wheel chair assembly
which includes modular parts that are easily to be assembled and
allow the users to adjust the size of the wheel chair so as to meet
needs.
BACKGROUND OF THE INVENTION
[0002] A conventional wheel chair generally includes a plurality
of metal tubes which are welded or soldered to be a specific shape
of assembly and the assemblies are connected with each other to
form a wheel chair. Generally, the conventional wheel chair is assembled
by two side assemblies which are the same and a pivotable device
is used to connect the two side assemblies. The shape of each of
the side assemblies is fixed and cannot be adjusted so that the
conventional wheel chairs can only be folded by pivoting the pivotable
device to push the two side assemblies toward each other. In order
to meet the different needs of the users, the wheel chairs includes
a first type that is designed for the users who can drive the wheels
and move by their own, and a second type which is designed for the
users who cannot operate the wheel chairs and have to be assisted
by others. For the first type of the wheel chairs, the distance
between the caster and the rear wheel is smaller than that of the
second type so that the users of the first type wheel chairs can
operate the wheels to move the wheel chairs. On the contrary, for
the second type of the wheel chairs, the distance between the caster
and the rear wheel has to be longer so as to be move in a stable
status. Besides, the metal tubes are welded or soldered together
and this takes a lot of time and is incurred by high cost.
SUMMARY OF THE INVENTION
[0003] In accordance with one aspect of the present invention,
there is provided a wheel chair assembly which comprises two identical
side assemblies and a pivotable device is pivotally connected therebetween.
Each side assembly includes a front part, a rear part, and atop
link and a low link are respectively connected between the two first
horizontal fittings and the two second horizontal fittings on the
front part and the rear part. A hanger bracket with a footplate
and a caster are respectively connected to the front part.
[0004] The rear part has a plurality of holes defined therein and
two rear wheels each have a shaft which is inserted in one of the
holes in each of the rear parts.
[0005] The primary object of the present invention is to provide
a wheel chair that is assembled by modular side assemblies and the
tubes of each of the side assemblies are positioned by screws.
[0006] The present invention will become more obvious from the
following description when taken in connection with the accompanying
drawings which show, for purposes of illustration only, a preferred
embodiment in accordance with the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a perspective view to show the wheel chair of
the present invention;
[0008] FIG. 2 is a side view to show the wheel chair of the present
invention;
[0009] FIG. 3 is an exploded view to show one of the two side assemblies
of the wheel chair of the present invention, and
[0010] FIG. 4 shows that the positions of the rear wheels can be
adjusted.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0011] Referring to FIGS. 1 to 3, the wheel chair of the present
invention comprises two identical side assemblies and each have
a front part 10, a rear part 50, a top link 20 and a low link 30.
The front part 10 has two first horizontal fittings 11, 12 extending
from a rear side thereof for the top link 20 and the low link 30
inserted therein respectively. The top link 20 and the low link
30 are secured by extending screws through the two first horizontal
fittings 11, 12. The top link 20 has two retaining members 21 extending
therefrom for retaining a rod of the pivotable device which will
be described later. A hanger bracket 80 has an insertion secured
in a top hole 13 in the front part 10 and a footplate is connected
to a lower end of the hanger bracket 80. A caster 90 has a connection
plate 14 which is connected to the front part 10.
[0012] The rear part 50 has two second horizontal fittings 51,
52 for the other ends of the top link 20 and the low link 30 respectively
inserted therein. The top link 20 and the low link 30 are also secured
by extending screws through the two second horizontal fittings 51,
52. A handle 60 is connected to a top hole of the rear part 50 and
a plurality of holes 54 are defined in the rear part 50. Two rear
wheels 70 each have a shaft which is inserted in one of the holes
54 in each of the rear parts 50.
[0013] The pivotable device pivotably connected between the two
side assemblies includes two H-shaped frames which are pivotably
connected with each other at two respective intermediate points
41 thereof. Each of the two H-shaped frames has a tube at a first
end thereof and the low link 30 passes through the tube. A rod 40
is connected to a second end of each of the two H-shaped frames
and is engaged with the retaining member 21.
[0014] Referring to FIG. 4, the position of the rear wheels 70
can be adjusted by removing the shaft of the rear wheel 70 from
one hole 54 to another so that the distance between the caster 90
and the rear wheel 70 can be adjusted. The way that the top links
20 and the low links 30 connected to the front part 10 and the rear
part 50 are made by inserting the top links 20 and the low links
30 in the horizontal fittings 11, 12, 51 and 52 so that it is easily
to be assembled and needs no soldering machines.
[0015] While we have shown and described the embodiment in accordance
with the present invention, it should be clear to those skilled
in the art that further embodiments may be made without departing
from the scope of the present invention. |