The present disclosure relates generally to a multipurpose wheelchair for patients.
More particularly, the present disclosure pertains to a wheelchair apparatus with a patient commode pan.
BACKGROUND
[002] Background description includes information that may be useful in understanding the
present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[003] A wheelchair is a chair with wheels, used when walking is difficult or impossible due
to illness, injury, or disability. A general transporting function for patients is normally carried out using wheelchairs or like devices. Numerous wheelchairs have been developed for this purpose, including both motorized and manually propelled wheelchairs. It has become a boon for most of movement impaired individuals right from its earlier introduction. As time changed requirement of wheelchair also changed to make out needs of different classes of patients. So many problems are faced by bedridden patients such as feeling lonely and will be craving for a change in their ambience.
[004] A disabled and non-ambulatory patient needs a nurse to help him or her, especially
when relieving oneself. In using a conventional portable patient commode pan, at least one nurse's assistance is needed by a patient while relieving oneself since the commodepanis not designed to allow the patient to use it without such assistance. However, most wheelchairs are limited to functional capabilities in that they typically provide only mobility or transportability from one location to another, and are unable to successfully perform other necessary functions, such as commode pan, assisting in patient transfer, lifting and like. Lifting and shifting of a disabled/bedridden person have always been difficult, risky and problematic. This lifting and shifting are dangerous and painful for a disabled person if done by an untrained person. This lifting and shifting are strenuous for nurses, when he/she is trying to lift the patient, he/she has to bend over the patient to lift him. This posture in long run gives the nurses a back pain and can

turn into permanent back problems. Moreover, the patients are scared of this procedure, as there
is a danger of slipping, falling, and getting injured.
[005] One attempt to provide a wheelchair cum bed of improved functional capability in
prior art is illustrated in FIG 1. There were different configurations which may have been utilized
for assembling linear actuator 104. One of the configurations was inclined position advisable in
which there may not be use of any separate mechanism (e.g. Beam engine linkages etc.), but was
denied because it would have occupied some extra floor area & volume, which would restrict
free movement of the nurses. This extra space is shown as area 102 in FIG. 1.
[006] Another attempt to provide improved performance capability of a patient wheelchair
cum bed is that linear actuator could have been coupled directly to leg rest (rather than being
connected to headrest), but this could give rise to problem of jerk movements in headrest as well
as in whole assembly, because providing motion to part with less inertia could bring instability in
chair.
[007] Problem corresponds to the ease of mobility of a bedridden patient, which directly
affects comfort & ergonomics of both patient & nurse. Developments in design of wheelchair for
such patients are an area of concern. Currently, available mechanisms for conversion of a
wheelchair into bed & vice versa are complex due to use of gearboxes and various other
complicated devices for same. Consequently, cost of such complex mechanisms is high, which
is estimated to be considerably lower for this proposed disclosure.
[008] There is, therefore, a need in the art to provide an improved wheelchair cum bed with
patient commode that overcomes the above-mentioned and other limitations of the existing
solutions and utilize techniques, which are robust, accurate, fast, efficient, cost-effective and
simple.
OBJECTS OF THE PRESENT DISCLOSURE
[009] Some of the objects of the present disclosure, which at least one embodiment herein
satisfies are as listed herein below.
[0010] Another object of the present disclosure is to provide a wheelchair cum bed with
patient commode auto-locking of a wheelchair into bed as an enhanced safety feature.
[0011] An object of the present disclosure is to provide a wheelchair cum bed with patient
commode used for extremely simple motion transfer.

[0012] Another object of the present disclosure is to provide a wheelchair cum bed with
patient commode provides comfort to patient so that he/she don't have to go through a painful
procedure.
[0013] Another object of the present disclosure is to provide a wheelchair cum bed with
patient commode available in an ergonomic manner.
SUMMARY
[0014] In an embodiment, the present disclosure relates generally to a multipurpose wheelchair for patients. More particularly, the present disclosure pertains to a wheelchair apparatus with a patient commode pan.
[0015] In an aspect, the present disclosure provides. A wheelchair apparatus with a patient commode pan. The apparatus includes a support frame structure; a hip rest fitted on the support frame structure, the hip rest having a first end and a second end: a back rest having an upper end and a lower end, the lower end of the back rest is pivotally coupled to the first end of the hip rest to move between an inclined position, in which the back rest is inclined to the hip rest, and a lowered position, in which the back rest is arranged parallel to hip rest; at least one first linear actuator is configured with the back rest to move the back rest between the inclined position and the lowered position; a leg rest having a top end and a bottom end, the top end of the leg rest is pivotally coupled to the second end of the hip rest to move between an first position, in which the leg rest is inclined to the hip rest and a second position, in which the leg rest is arranged parallel to the hip rest; a commode pan is detachably coupled to a lower side of the hip rest, wherein the hip rest includes a siding plate configured to move between an open position, in which sliding plate is moved towards second end of the hip rest to allow access of the commode from the hip rest, and a closed position, in which the sliding plate is moved towards first end of the hip rest to cover the commode pan; wherein the leg rest is coupled to the back rest through a motion transfer means such that movement of the back rest between the inclined position and the lowered position enables movement of the leg rest between the first position and the second position, wherein movement of the back rest from the inclined position to the lowered position enables movement of the leg rest from the first position to the second position converts the wheelchair apparatus into a stretcher.

[0016] In an aspect, the wheelchair apparatus comprises a conveyor belt arrangement
configured with the commode pan to move the commode in a transverse direction of the hip rest
out of the hip rest, and wherein commode pan is magnetically coupled to the conveyor belt
arrangement.
[0017] In an aspect, the wheelchair apparatus comprises a motor to actuate the linear
actuator to move the back rest between the inclined position and the lowered position, and
wherein the motor is configured to move the conveyor belt arrangement in the transverse
direction of the hip rest.
[0018] In an aspect, the wheelchair apparatus comprises a battery to supply power to the
motor.
[0019] In an aspect, the wheelchair apparatus comprises a first set of castor wheels
configured at lower end of the frame structure to allow motion of the frame structure.
[0020] In an aspect, the back rest comprises L-shaped coupled to the at least one first linear
actuator.
[0021] In an aspect, the wheelchair apparatus comprises at least one first linear actuator is a
piston-cylinder arrangement.
[0022] In an aspect, the wheelchair apparatus comprises the motion transfer means is a
cable-pulley arrangement connecting the back rest to the leg rest.
[0023] In an aspect, the wheelchair apparatus includes a set of second linear actuators
configured with the leg rest, wherein the set of second linear actuators are pneumatic actuator.
[0024] In an aspect, the wheelchair apparatus comprises a bed structure having a cavity to
accommodate the frame structure when the back rest is at the lowered position, wherein the bed
structure comprises a set of sensors to sense position of frame structure into the cavity of the bed
structure, a rack and pinion arrangement to lock the frame in the cavity of the bed structure when
the frame structure is fully accommodated into the cavity, and a second set of caster wheel
configured at lower end of the bed structure to allow movement of the bed structure.
BRIEF DESCRIPTION OF FIGURES
[0025] In the figures, similar components and/or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first

reference label is used in the specification, the description is applicable to any one of the similar
components having the same first reference label irrespective of the second reference label.
[0026] FIG. 1 illustrates a wheelchair cum bed of improved functional capability in prior art
in accordance with an embodiment of the present disclosure
[0027] FIG. 2A illustrates a perspective view of a wheelchair cum bed with patient
commode in accordance with an embodiment of the present disclosure.
[0028] FIG. 2B illustrates backrest in a horizontal position with a linear actuator in a closed
position in accordance with an embodiment of the present disclosure.
[0029] FIG. 2C illustrates commode pan and its components in accordance with an
embodiment of the present disclosure.
[0030] FIG. 3 illustrates various component positioning of commode pan in accordance with
an embodiment of the present disclosure.
[0031] FIG.4 illustrates an assembly of fabrication bed and wheelchair with a locking
mechanism in accordance with an embodiment of the present disclosure.
DETAILED DESCRIPTION
[0032] Embodiments of the present disclosure include various steps, which will be described below. The steps may be performed by hardware components or may be embodied in machine-executable instructions, which may be used to cause a general-purpose or special-purpose processor programmed with the instructions to perform the steps. Alternatively, steps may be performed by a combination of hardware, software, and firmware or by human operators. [0033] If the specification states a component or feature "may", "can", "could", or "might" be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0034] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional equivalents

thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
[0035] Thus, for example, it will be appreciated by those of ordinary skill in the art that the diagrams, schematics, illustrations, and the like represent conceptual views or processes illustrating systems and methods embodying this disclosure. The functions of the various elements shown in the figures may be provided through the use of dedicated hardware as well as hardware capable of executing associated software. Similarly, any electronic code generator shown in the figures is conceptual only. Their function may be carried out through the operation of program logic, through dedicated logic, through the interaction of program control and dedicated logic, or even manually, the particular technique being selectable by the entity implementing this disclosure. Those of ordinary skill in the art further understand that the exemplary hardware, software, processes, methods, and/or operating systems described herein are for illustrative purposes and, thus, are not intended to be limited to any particular named. [0036] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing. [0037] Reference to "an embodiment" in this description indicates that a particular configuration, structure or characteristic described regarding the embodiment is included in at least one embodiment. Hence, expressions such as "in an embodiment" and the like, present in various parts of this description, do not necessarily refer to the same embodiment. Furthermore, particular configurations, structures or characteristics may be combined in any suitable manner in one or more embodiments. References herein are used for facilitating the reader and thus they do not define the scope of protection or the range of the embodiments.
[0038] In an embodiment, the present disclosure relates generally to a multipurpose wheelchair for patients. More particularly, the present disclosure pertains to a wheelchair apparatus with a patient commode pan.
[0039] In an aspect, the present disclosure provides. A wheelchair apparatus with a patient
commode pan. The apparatus includes a support frame structure; a hip rest fitted on the support frame structure, the hip rest having a first end and a second end: a back rest having an upper end and a lower end, the lower end of the back rest is pivotally coupled to the first end of the hip rest

to move between an inclined position, in which the back rest is inclined to the hip rest, and a
lowered position, in which the back rest is arranged parallel to hip rest; at least one first linear
actuator is configured with the back rest to move the back rest between the inclined position and
the lowered position; a leg rest having a top end and a bottom end, the top end of the leg rest is
pivotally coupled to the second end of the hip rest to move between an first position, in which
the leg rest is inclined to the hip rest and a second position, in which the leg rest is arranged
parallel to the hip rest; a commode pan is detachably coupled to a lower side of the hip rest,
wherein the hip rest includes a siding plate configured to move between an open position, in
which sliding plate is moved towards second end of the hip rest to allow access of the commode
from the hip rest, and a closed position, in which the sliding plate is moved towards first end of
the hip rest to cover the commode pan; wherein the leg rest is coupled to the back rest through a
motion transfer means such that movement of the back rest between the inclined position and the
lowered position enables movement of the leg rest between the first position and the second
position, wherein movement of the back rest from the inclined position to the lowered position
enables movement of the leg rest from the first position to the second position converts the
wheelchair apparatus into a stretcher.
[0040] In an aspect, the wheelchair apparatus comprises a conveyor belt arrangement
configured with the commode pan to move the commode in a transverse direction of the hip rest
out of the hip rest, and wherein commode pan is magnetically coupled to the conveyor belt
arrangement.
[0041] In an aspect, the wheelchair apparatus comprises a motor to actuate the linear
actuator to move the back rest between the inclined position and the lowered position, and
wherein the motor is configured to move the conveyor belt arrangement in the transverse
direction of the hip rest.
[0042] In an aspect, the wheelchair apparatus comprises a battery to supply power to the
motor.
[0043] In an aspect, the wheelchair apparatus comprises a first set of castor wheels
configured at lower end of the frame structure to allow motion of the frame structure.
[0044] In an aspect, the back rest comprises L-shaped coupled to the at least one first linear
actuator.

[0045] In an aspect, the wheelchair apparatus comprises at least one first linear actuator is a piston-cylinder arrangement.
[0046] In an aspect, the wheelchair apparatus comprises the motion transfer means is a cable-pulley arrangement connecting the back rest to the leg rest.
[0047] In an aspect, the wheelchair apparatus includes a set of second linear actuators configured with the leg rest, wherein the set of second linear actuators are pneumatic actuator. [0048] In an aspect, the wheelchair apparatus comprises a bed structure having a cavity to accommodate the frame structure when the back rest is at the lowered position, wherein the bed structure comprises a set of sensors to sense position of frame structure into the cavity of the bed structure, a rack and pinion arrangement to lock the frame in the cavity of the bed structure when the frame structure is fully accommodated into the cavity, and a second set of caster wheel configured at lower end of the bed structure to allow movement of the bed structure. [0049] FIG. 2A illustrates a perspective view of a wheelchair cum bed with patient commode in accordance with an embodiment of the present disclosure.
[0050] In an embodiment, a wheelchair apparatus with patient commode pan includes a support frame structure. The support frame structure or wheelchair 200 having a backrest 206is pivotally coupled in an inclined position with a longitudinal axis of hiprest 208. The hiprest208 being stationary is pivotally coupled with the backrest 206 and legrest 212. The legrest 212 is pivotally coupled in an inclined position with longitudinal axiship rest 208, the hip rest208 is coupled with sliding plate 242 at middle position. L-shaped connector 216 is rigidly held with the backrest 206. Linear actuator 224 comprises of piston 220 and cylinder 222 assembly, wherein an upper portion of the piston 220 is pivoted with lower end of the cylinder 222 and upper part of piston 220 is coupled with lower part of the L-shaped connector 216. The Linear actuator 224 and the L-shaped connector 216 provides 90 degrees anticlockwise movement which pulls the backrest 206 and restricts its motion till longitudinal axis of the hip rest 208 coincides with a longitudinal axis of the backrest 206. Pulleys 228 attached to support frame structure 200 are operatively coupled with wire cables 218such that wire cables 218 are rigidly fixed with rear end of the backrest 206 and extends to a rear end of the leg rest 212. Wire cables 218 are guided by rollers such as pulleys 228, piston-cylinder assembly such as but not limited to gas spring 210 pushes the leg rest 212 90 degrees in anticlockwise direction about the pivot joint by same angle with which the backrest 206 is moving such that the leg rest212restricts such that

longitudinal axis of the backrest 206 coincides with longitudinal axis of the hip rest208and the backrest 206. Commode conveyor pulley assembly supported with support frame structure 200 is placed under the hip rest 208 includes commode pan 300 (as shown in FIG. 3) with magnetic base, conveyor belt 248 (as shown in FIG. 2C) and pulley 246 (as shown in FIG. 2C) coupled with each other such that commodepan300 (as shown in FIG. 3) moves horizontally to replace with new and hygienic commode pan 300 (as shown in FIG. 3).
[0051] In an embodiment, wheelchair apparatus includes linear actuator 222. The linear actuator 222 comprises of cylinder 224 and piston 220. The lower part of cylinder 222 pivoted with support frame structure 200 thus giving freedom to the linear actuator 224 to rotate about this point, the upper end of piston 220 is connected to the lower portion of L-shaped connector 216. In another embodiment, the L-shaped connector 216 is rigidly connected with the backrest 206. These arrangement of linkages are very similar to beam engine, a four-bar inversion mechanism, the linear actuator 224 providing a push to the backrest 206 relative to the hip rest 208 at 90 degrees anticlockwise direction, restricting movement of the backrest 206 when longitudinal axis of the hip rest 208 coincides with longitudinal axis of the backrest 206. The linear actuator 224 is operatively coupled with DC motor 244 (as shown in FIG. 2C), said DC motor 244 (as shown in FIG. 2C) is powered with battery 230, for starting the linear actuator 224. The DC motor 244 (as shown in FIG. 2C) is a small capacity motor with internal gears and generates sufficient torque enough to support a patient's weight while the backrest 206 is rotated in anticlockwise direction relative to the hip rest position 208.
[0052] In an embodiment, wheelchair apparatus includes the leg rest 212 pivoted with the hip rest 208. The leg rest 212 comprises of wire cables 218 guided by the pulleys 228 and gas spring 210. The gas spring 210 pushes the leg rest 212 for 90 degrees anticlockwise movement about the pivoted point by same angle with which the backrest 206 is moving, restricts movement when longitudinal axis of the leg rest 212 coincides with longitudinal axis of the hip rest 208. For successful transfer of movement from the backrest 206 to the leg rest 212, the leg rest 212 must be able to rotate about pivoted joint relative to the hip rest 208. In another embodiment, the transfer of movement has been achieved with a combination of wire cables 218 and pulley 228 arrangement. Pulleys 228 are attached to support frame structure 200, the wire cables 218 with low compressibility property is fixed at rear end of the backrest 206 extends to a

rear end of the leg rest 212. In another embodiment, the gas spring 210 serves an important function of bringing the leg rest 212 to original bed position when pushed by wire cables 218. [0053] FIG. 2B illustrates backrest in a horizontal position with a linear actuator in a closed position in accordance with an embodiment of the present disclosure.
[0054] The process of converting the wheelchair into the shape of a bed is performed as follows. The chair angle adjusting DC motor primarily activates the backrest 232 to rotate the backrest 232 on the hinge in an anticlockwise direction, restricting movement when longitudinal axis of the hip rest 234 coincides longitudinal axis of the backrest 232. This consequently pulls the wire cables 218 guided by pulleys 228 to push the leg rest 236 in anticlockwise direction restricting movement when longitudinal axis of the hip rest 236 coincides with the longitudinal axis of leg rest 236.
[0055] FIG. 2C illustrates various component positioning of commode pan in accordance with an embodiment of the present disclosure.
[0056] In an embodiment, two holes are provided in the commode pan 300 (shown in FIG. 3), first hole provides flexible pipe inlet 302 of water for assisting in cleaning purposes, another hole is provided with flexible pipe 304 in the base of the commode pan 300 (shown in FIG. 3) for connecting the commode pan 300 (shown in FIG. 3) to vacuum cleaning device. This commode conveyor pulley assembly will ensure proper hygiene of patient as well as for surrounding people. In another embodiment, the hip rest 208 (as shown in FIG. 2A) configured with sliding sheet 242 (shown in FIG. 2C) at a middle position such that it can easily slide whenever patient wants to use the commode pan 300 (shown in FIG. 3).
[0057] FIG. 3 illustrates commode pan and its components in accordance with an embodiment of the present disclosure.
[0058] In an embodiment, unlike both the movable backrest 206 (as shown in FIG. 2A) and the leg rest 212 (as shown in FIG. 2A), the hip rest 208 (as shown in FIG. 2A) is stationary with the commode pan 300 being attached to the lower portion of said hip rest 208 (as shown in FIG. 2A). The commode conveyor pulley assembly positioned under the hip rest 208 (as shown in FIG. 2A) comprises of commode pan 300 with magnetic base, conveyor belt 248, and pulleys 246 coupled with each other such that commode pan 300 moves along the conveyor belt 248 in horizontal direction and can be conveniently changed with new and hygienic commode pan 300. The commode pan 300 is held in its position with help of magnetic connection generated

between base of the commode pan 300 and conveyor pulley arrangement, wherein magnet ensures proper positioning of the commode pan 300 on conveyor belt pulley arrangement. [0059] FIG. 4 illustrates an assembly of fabrication bed and wheelchair with a locking mechanism in accordance with an embodiment of the present disclosure.
[0060] In another embodiment, wheelchair apparatus includes fabrication bed 412 having sensor, DC motor404, rack 406 and pinion 402 locking arrangement. Fabrication bed 412 configured with the sensor operatively coupled with a control unit and the DC motor 404 to detect a fully inserted position of the support frame structure and generate a locking signal based on detected condition. The sensor depicts fully inserted position of wheelchair starting the DC motor 404 to rotate the pinion 402, said pinion 402 runs the rack 406 to the position where it locks the wheelchair with fabrication bed 412. In an embodiment, fabrication bed 412 made from but not limited to metals such as stainless steel, aluminium, brass, copper or their alloys separately which is compatible for locating resting position of the wheelchair 200 (as shown in FIG. 2A) inside fabrication bed 412. Both, the fabrication bed 412 and wheelchair 200 (as shown in FIG. 2A) are provided with caster wheels 414 so that wheelchair 200 (as shown in FIG. 2A) could be easily inserted inside the fabrication bed 412, as and when required. The position sensing mechanism will ensure the locking mechanism to get activated when the wheelchair 200 (as shown in FIG. 2A) gets fully inserted into the fabrication bed412. The use of sensor will ensure that wheelchair 200 (as shown in FIG. 2A) gets automatically locked inside the fabrication bed 412 subassemblies smoothly and easily.
ADVANTAGES OF INVENTION
[0061] The present disclosure provides a wheelchair cum bed with patient commode. [0062] The present disclosure provides a wheelchair cum bed with patient commode auto-locking of a wheelchair into bed as an enhanced safety feature.
[0063] The present disclosure provides a wheelchair cum bed with patient commode used for extremely simple motion transfer.
[0064] The present disclosure provides a wheelchair cum bed with patient commode provides comfort to a patient so that he/she don't have to go through a painful procedure.

[0065] The present disclosure provides a wheelchair cum bed with patient commode available in an ergonomic manner.

We Claim:

1.A wheelchair apparatus with patient commode pan comprising:
a support frame structure;
a hip rest fitted on the support frame structure, the hip rest having a first end and a second end;
a back rest having an upper end and a lower end, the lower end of the back rest is pivotally coupled to the first end of the hip rest to move between an inclined position, in which the back rest is inclined to the hip rest, and a lowered position, in which the back rest is arranged parallel to hip rest;
at least one first linear actuator is configured with the back rest to move the back rest between the inclined position and the lowered position;
a leg rest having a top end and a bottom end, the top end of the leg rest is pivotally coupled to the second end of the hip rest to move between an first position, in which the leg rest is inclined to the hip rest and a second position, in which the leg rest is arranged parallel to the hip rest;
a commode pan is detachably coupled to a lower side of the hip rest, wherein the hip rest includes a siding plate configured to move between an open position, in which sliding plate is moved towards second end of the hip rest to allow access of the commode from the hip rest, and a closed position, in which the sliding plate is moved towards first end of the hip rest to cover the commode pan;
wherein the leg rest is coupled to the back rest through a motion transfer means such that movement of the back rest between the inclined position and the lowered position enables movement of the leg rest between the first position and the second position, wherein movement of the back rest from the inclined position to the lowered position enables movement of the leg rest from the first position to the second position converts the wheelchair apparatus into a stretcher.
2. The wheelchair apparatus as claimed in claim 1, wherein the wheelchair apparatus
comprises a conveyor belt arrangement configured with the commode pan to move the
commode in a transverse direction of the hip rest out of the hip rest, and wherein commode
pan is magnetically coupled to the conveyor belt arrangement.

3. The wheelchair apparatus as claimed in claim 1, wherein the wheelchair apparatus comprises a motor to actuate the linear actuator to move the back rest between the inclined position and the lowered position, and wherein the motor is configured to move the conveyor belt arrangement in the transverse direction of the hip rest.
4. The wheelchair apparatus as claimed in claim 3, wherein the wheelchair apparatus comprises a battery to supply power to the motor.
5. The wheelchair apparatus as claimed in claim 1, wherein the wheelchair apparatus comprises a first set of castor wheels configured at lower end of the frame structure to allow motion of the frame structure.
6. The wheelchair apparatus as claimed in claim 1, wherein the back rest comprises an L-shaped coupled to the at least one first linear actuator.
7. The wheelchair apparatus as claimed in claim 1, wherein the at least one first linear actuator is a piston-cylinder arrangement.
8. The wheelchair apparatus as claimed in claim 1, wherein the motion transfer means is a cable-pulley arrangement connecting the back rest to the leg rest.
9. The wheelchair apparatus as claimed in claim 1, wherein the wheelchair apparatus includes a set of second linear actuators configured with the leg rest, wherein the set of second linear actuators are pneumatic actuator.
10. The wheelchair apparatus as claimed in claim 1, wherein the wheelchair apparatus comprises a bed structure having a cavity to accommodate the frame structure when the back rest is at the lowered position, wherein the bed structure comprises a set of sensors to sense position of frame structure into the cavity of the bed structure, a rack and pinion arrangement to lock the frame in the cavity of the bed structure when the frame structure is fully accommodated into the cavity, and a second set of caster wheel configured at lower end of the bed structure to allow movement of the bed structure.