Description:FIELD OF THE INVENTION

[0001] The present invention relates to an assistive device for wheelchair transfers that automatically adjusts to the user’s body shape to eliminate imbalance during transitioning from the wheelchair and continuously monitors surrounding light to provide additional illumination when necessary to prevent mishaps caused by low visibility.

BACKGROUND OF THE INVENTION

[0002] Patients with partial paralysis or limited mobility often face significant challenges when transferring between surfaces, such as from a wheelchair to a bed or vice versa. This process is physically demanding, risky, and uncomfortable, both for the patient and the caregiver. Traditional transfer methods often lack adequate safety features and require considerable manual effort, leading to the risk of injury to both parties. A device that provides a safer, more efficient, and comfortable transfer experience is essential for improving the quality of care for such patients.

[0003] Traditional methods of transferring patients with limited mobility involve the use of basic transfer boards, slings, or manual assistance from caregivers. While these methods are widely used, they come with several limitations. For example, manual lifting cause strain and injury to caregivers, and transfer boards often fail to provide sufficient stability or support for patients. These methods also require considerable coordination and effort, making the process time-consuming and challenging, particularly for caregivers handling heavier patients or working alone.

[0004] US20070124859A1 discloses a wheelchair transfer device is configured for moving an invalid patient from a flat surface to a seated position for transport in the seated position on the transfer device. The transfer device includes a rolling base supported by casters and convertible low profile rollers that are configured to fit under the base of a hospital bed and convert to a larger diameter wheel without altering the height of the transfer device. The transfer device includes a leg portion, a torso portion and a seat portion configured to be coplanar for adaptation to a hospital bed, so that an invalid patient can, with assistance, roll onto the device. The seat portion can then be raised against the patient's buttocks, generally perpendicular to the leg and torso portions, and the whole assembly can then be rotated to a vertical position, with the seat portion supporting the weight of the patient.

[0005] US20030093858A1 discloses a generally rectangular wheelchair transfer board is positioned between a wheelchair and a surface for allowing a person to slid across the board between the wheelchair and the surface, or vice versa. The transfer board includes a slot formed along the rear edge of the board and a notch formed along the front edge of the board. The slot is positionable over the wheel of the wheelchair so as to help hold the board in place during use. The notch is placed under the leg of the individual in the wheelchair so as to more easily allow the person to initially position their body onto the transfer board.

[0006] Conventionally, many means are developed to assist in patient transfer, however the devices mentioned in the prior arts have limitations pertaining risks such as slipping or incorrect positioning during transfer, whereas also lack monitor the patient’s condition during transfer process which compromises safety and comfort.

[0007] In order to overcome the aforementioned drawbacks, there exists a need in the art to develop a device that is capable of preventing slipping and incorrect positioning during transfer, in addition, the developed device also needs to be capable of monitoring the patient’s condition during transfer in order to provide safety and comfort.

OBJECTS OF THE INVENTION

[0008] The principal object of the present invention is to overcome the disadvantages of the prior art.

[0009] An object of the present invention is to develop a device that adjust automatically as per the user’s body shape in order to eliminate the chances of imbalance at the time transitioning.

[0010] Another object of the present invention is to develop a device that continuously monitor the light in the surrounding and provide additional illumination when necessary for eliminating the chances of any misshaping due to low visibility.

[0011] Another object of the present invention is to develop a device that monitor the pressure applied by the user and notify the caretaker to assist the patient when necessary in order to eliminate the chances of injuries.

[0012] Yet another object of the present invention is to develop a device that monitor the weight of the user at the time of transfer and accordingly take corrective measures to eliminate the chances of accidents.

[0013] The foregoing and other objects, features, and advantages of the present invention will become readily apparent upon further review of the following detailed description of the preferred embodiment as illustrated in the accompanying drawings.

SUMMARY OF THE INVENTION

[0014] The present invention relates to an assistive device for wheelchair transfers that monitors user weight during transfers from the wheelchair and take the corrective measures whenever necessary to prevent accidents. Additionally, rotate the user at an optimum angle, enhancing safety and ensuring a smoother transfer process.

[0015] According to an embodiment of the present invention, an assistive device for wheelchair transfers, comprises of a circular platform developed to be positioned on a ground surface, plurality of telescopically operated rods are arranged underneath the platform for supporting the platform at a height on the surface, a rotatable circular plate arranged on the platform that is accessed by a user seated over a wheelchair for stepping over the plate while transitioning from the wheelchair to any resting surface, an artificial intelligence-based imaging unit is installed on the platform and integrated with a processor for capturing and processing multiple images of the platform to determine the height of the user, a pair of vertical telescopic links attached with the plate to extend for positioning a handle attached with free-ends of the link at an optimum height that is accessed by the user for acquiring a grip over the handle as a means of support, a microphone integrated with the platform for receiving voice commands of the user regarding transitioning over the resting surface.

[0016] According to another embodiment of the present invention, the proposed device further comprises of a DC (Direct Current) electric motor coupled with the plate to rotate the plate an optimum angle allowing the user to shift from the wheelchair to the resting surface with ease, multiple L-shaped telescopic bars radiating from outer periphery of the platform attached with a stabilizing pads to extend and retract in a repetitive manner for positioning the pads in contact with ground surface. plurality of weight sensor integrated with the plate to detect weight of the user, plurality of weight sensor integrated with the plate to detect weight of the user, a speaker provided on the platform to notify the user regarding potential chances of misbalancing, a pressure sensor is integrated with the handle for detecting grip strength of the user, a LDR (Light Dependent Resistor) is configured on the platform for monitoring intensity of light in surrounding and a battery is associated with the device for powering up electrical and electronically operated components associated with the device.

[0017] While the invention has been described and shown with particular reference to the preferred embodiment, it will be apparent that variations might be possible that would fall within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings where:
Figure 1 illustrates an isometric view of an assistive device for wheelchair transfers.

DETAILED DESCRIPTION OF THE INVENTION

[0019] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.

[0020] In any embodiment described herein, the open-ended terms "comprising," "comprises,” and the like (which are synonymous with "including," "having” and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of," consists essentially of," and the like or the respective closed phrases "consisting of," "consists of, the like.

[0021] As used herein, the singular forms “a,” “an,” and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.

[0022] The present invention relates to an assistive device for wheelchair transfers that monitors the pressure applied by user and alerts the caretaker when assistance is needed, reducing the risk of injuries and ensuring timely support for the patient.

[0023] Referring to Figure 1, an isometric view of an assistive device for wheelchair transfers is illustrated, comprising a circular platform 101 positioned on a ground surface, plurality of telescopically operated rods 102 are arranged underneath the platform 101, a rotatable circular plate 103 arranged on the platform 101, an artificial intelligence-based imaging unit 104 is installed on the platform 101, a pair of vertical telescopic links 105 attached with the plate 103, a handle 106 attached with free-ends of the link 105, a microphone 107 integrated with the platform 101, multiple L-shaped telescopic bars 108 radiating from outer periphery of the platform 101, a speaker 109 provided on the platform 101 and plurality of LED (Light Emitting Diode) lights 110 configured on the platform 101.

[0024] The device disclosed herein includes a circular platform 101 that is developed to be placed securely on a ground surface, providing a stable base for the device. The circular shape allows for easy movement or rotation, depending on the application. The construction of the platform 101 ensures that the platform 101 is capable of handling necessary weight and functionality, offering durability and support during operation. Whether stationary or in motion, the circular platform 101 serves as a reliable foundation for ensuring balance and consistent performance in various tasks, including those requiring rotation or positioning adjustments.

[0025] A plurality of telescopically operated rods 102 are positioned beneath the circular platform 101 to provide adjustable support. The telescopically operated rods 102 operates through a pneumatic arrangement comprising an air compressor, air cylinder, air valves, and a piston, working together to extend and retract the rod 102. The rod 102 features a nested tube arrangement, with multiple concentric hollow tubes. The air cylinder, attached at the bottom of the nested tubes, houses a piston at the top. The air cylinder has an inlet and outlet valve connected to the compressor, which compresses air drawn from the surroundings. The pressurized air from the compressor enters the inlet valve, driving the piston forward. As the piston moves, the nested tubes are sequentially extended, lengthening the rod 102 to a desired height above the ground surface.

[0026] A rotatable circular plate 103 is mounted on the platform 101, developed for easy access by a user seated in a wheelchair for allowing the user to step onto the plate 103 while transitioning from the wheelchair to another resting surface, such as a bed or chair. The rotatable feature of the plate 103 facilitates smooth movement for enabling the user to pivot or turn as needed.

[0027] To activate the device, the user manually presses a push button which is installed on the platform 101. Upon pressing the button, the circuits within the device gets close, allowing electric current to flow. The push button has an outer casing and an inner mechanism, including a spring and metal contacts. When the button is pressed, the spring-loaded mechanism inside is pushes down on. In the default state, the internal contacts are apart, so the circuit is open and no electricity flows. Pressing the button makes the contacts touch each other, closing the circuit and allowing electricity to flow, which activates an inbuilt microcontroller that regulates the further options of the device.

[0028] Upon activation, the microcontroller activates an artificial intelligence based imaging unit 104 installed on the platform 101 to capture and process multiple images around the platform 101, to determine the height of the user. The imaging unit 104 comprises of an image capturing arrangement including a set of lenses that captures multiple images in vicinity of the body, and the captured images are stored within a memory of the imaging unit 104 in form of an optical data. The imaging unit 104 also comprises of a processor that is integrated with artificial intelligence protocols, such that the processor processes the optical data and extracts the required data from the captured images. The extracted data is further converted into digital pulses and bits and are further transmitted to the microcontroller. The microcontroller processes the received data and evaluate the height of the user.

[0029] Based on the determined height of the user, the microcontroller controls the actuation of a pair of vertical telescopic links 105 attached to the rotatable plate 103. The telescopic links 105 herein operates same as mentioned above to position a handle 106 at an optimal height, ensuring that the user easily reach and grip the handle 106.

[0030] During gripping of the handles, the microcontroller activates a pressure sensor integrated into the handle 106 to monitor the user's grip strength. The pressure sensor operates by detecting changes in pressure and converting them into an electrical signal. When pressure is applied to the sensor, a deformation is causes in a sensing element, such as a diaphragm or piezoelectric material. The deformation of the sensing element results in a change in electrical properties, such as resistance or capacitance. The sensor detects these changes and generates a corresponding electrical signal, which is then sent to the microcontroller, which interprets the pressure level.

[0031] In case, the detected grip strength falls below a predetermined threshold, signaling that the user is struggling to maintain a secure hold, the microcontroller triggers a speaker 109 mounted on the platform that emits an alert for notifying nearby individuals to offer assistance. The speaker 109 works by converting the electrical signal into the audio signal. The speaker 109 consists of a cone known as a diaphragm attached to a coil-shaped wire placed between two magnets. When the electric signal is passed through the voice coil, a varying magnetic field is generated by the coil that interacts with the magnet causing the diaphragm to move back and forth. The movement of the diaphragm pushes and pulls air creating sound waves just like the electrical signal received and used to notify the user.

[0032] As the plate 103 is positioned at the optimum height the user initiates a voice command through a microphone 107 integrated into the platform 101 regarding the transition process over the resting surface. When the user speaks to give voice commands to the microphone 107, the given commands are first captured by the microphone 107. These sound waves from the captured voice commands hit the diaphragm which vibrates back and forth in response to sound waves. The back and forth movement of the diaphragm is then transferred to a capacitor connected to the microphone 107 that converts the vibrations into an electrical signal that mirrors the pattern of the sound waves. The electrical signal is sent to the microcontroller which further activates a DC (Direct Current) electric motor 108 coupled with the plate 103 to rotate the plate 103 to an optimum angle, which allows the user to shift from the wheelchair to the resting surface.

[0033] The DC (Direct Current) electric motor 108 converts electrical energy into mechanical energy using direct current. The DC (Direct Current) electric motor 108 operates based on the principle of electromagnetic induction. The motor consists of key components: a rotor (armature), a stator with permanent magnets or electromagnets, a commutator, and brushes. When current flows through the armature winding, a magnetic field is generated that interacts with the magnetic field of the stator. The interaction of the magnetic fields creates a torque that causes the rotor to rotate. The commutator, in conjunction with the brushes, reverses the current direction in the armature windings periodically, ensuring continuous rotation in a single direction.

[0034] A plurality of weight sensors is integrated into the plate 103 to detect the user's weight. The weight sensor comprises of a transducer and a strain gauge. The force applied on the sensor due to weight load leads to the deformation of the strain gauge. The deformations are measured and the transducer converts the force to the electrical resistance which is sent as an electrical output to the microcontroller. The sensor detects the weight and as the weight exceeds a pre-defined threshold limit, the signal is sent to the microcontroller. The microcontroller activates the speaker 109 that notifies the user with an audible alert for warning them of the potential imbalance.

[0035] While the user is transitioning from the wheelchair to the resting surface the microcontroller actuates multiple L-shaped telescopic bars 108, arranged around the outer edge of the platform 101, each equipped with stabilizing pads. The L-shaped telescopic bar 108 herein operates through a pneumatic arrangement as mentioned above to ensure that the stabilizing pads make contact with the ground, providing stability to the device during use.

[0036] An LDR (Light Dependent Resistor) configured on the platform 101 monitors the surrounding light intensity. The LDR monitors light intensity by varying the internal resistance based on the amount of light received by the LDR (Light Dependent Resistor). When light falls on the LDR (Light Dependent Resistor), the internal resistance decreases proportionally to the intensity of light. The change in resistance alters the voltage across the LDR (Light Dependent Resistor), which is measured by the sensor. The voltage signal is then sent to microcontroller and processed to determine the light intensity in the surrounding environment.

[0037] When the detected light falls below a preset threshold, the microcontroller activates multiple LEDs (Light Emitting Diodes) 110 installed on the platform 101. These LEDs (Light Emitting Diodes) 110 then illuminate to provide optimal lighting for the user. LEDs (Light Emitting Diodes) 110 are made from semiconductor materials which have properties that allow them to emit light. The LEDs (Light Emitting Diodes) 110 contains a p-n junction, where a p-type region is positively charged and an n-type region is negatively charged. When voltage is applied, electrons from the n-region move towards the p-region, and holes from the p-region move towards the n-region. As the electrons move across the p-n junction, they recombine with the holes. During this process, the electrons lose energy, and this energy is released in the form of photons (light).

[0038] Moreover, a battery is associated with the device to supply power to electrically powered components which are employed herein. The battery is comprised of a pair of electrodes known as a cathode and an anode. A voltage is generated between the anode and cathode via oxidation/reduction and thus produces the electrical energy to provide to the device.

[0039] The present invention works best in the following manner, where the circular platform 101, supported by telescopic rods 102, is positioned on the ground and provides the stable base. The rotatable circular plate 103 is mounted on the platform 101, allowing the user to step onto the plate 103 during the transition process. The artificial intelligence based imaging unit 104 captures and processes images of the user to determine the height of the user. The determined height is sent to the microcontroller, which actuates the pair of vertical telescopic links 105 attached to the plate 103. These links 105 adjust the position of the handle 106 to the optimal height for the user, ensuring the secure grip. The platform 101 is integrated with the microphone 107 that receives the user's voice commands for transitioning. Upon receiving commands, the microcontroller activates the DC (Direct Current) electric motor 108 to rotate the plate 103 to the required angle, enabling the user to shift smoothly from the wheelchair to the resting surface. Additionally, the device features multiple L-shaped telescopic bars 108 with stabilizing pads radiating from the periphery of the platform 101. During the transition, the microcontroller extends and retracts these bars 108 repeatedly, ensuring the stabilizing pads remain in contact with the ground to maintain the stability of the platform 101.

[0040] Although the field of the invention has been described herein with limited reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. , Claims:1) An assistive device for wheelchair transfers, comprising:

i) a circular platform 101 developed to be positioned on a ground surface, wherein plurality of telescopically operated rods 102 are arranged underneath said platform 101 for supporting said platform 101 at a height on said surface;
ii) a rotatable circular plate 103 arranged on said platform 101 that is accessed by a user seated over a wheelchair for stepping over said plate 103 while transitioning from said wheelchair to any resting surface, wherein an artificial intelligence-based imaging unit 104 is installed on said platform 101 and integrated with a processor for capturing and processing multiple images of said platform 101, respectively to determine height of said user;
iii) a microcontroller linked with said imaging unit 104 for processing said determined height to regulate actuation of a pair of vertical telescopic links 105 attached with said plate 103 to extend for positioning a handle 106 attached with free-ends of said link 105 at an optimum height, that is accessed by said user for acquiring a grip over said handle 106 as a means of support;
iv) a microphone 107 integrated with said platform 101 for receiving voice commands of said user regarding transitioning over said resting surface, wherein said microcontroller upon receiving said user’s commands regulates actuation of a DC (Direct Current) electric motor 108 coupled with said plate 103 to rotate said plate 103 an optimum angle, allowing said user to shift from said wheelchair to said resting surface with ease; and
v) multiple L-shaped telescopic bars 108 radiating from outer periphery of said platform 101, each of said bars 108 are attached with a stabilizing pads, wherein said microcontroller while shifting of said user from wheelchair to resting surface, actuates said bars 108 to extend and retract in a repetitive manner for positioning said pads in contact with ground surface, in view of stabilizing said device during usage.

2) The device as claimed in claim 1, wherein plurality of weight sensor integrated with said plate 103 to detect weight of said user, and in case said detected weight exceeds a threshold limit, said microcontroller activates a speaker 109 provided on said platform 101 to notify said user regarding potential chances of misbalancing.

3) The device as claimed in claim 1, wherein a pressure sensor is integrated with said handle 106 for detecting grip strength of said user, and in case said detected grip strength recedes a threshold value, said microcontroller activates said speaker 109 to notify individuals in proximity to support said user.

4) The device as claimed in claim 1, wherein a LDR (Light Dependent Resistor) is configured on said platform 101 for monitoring intensity of light in surrounding, and in case said detected intensity of light in surroundings recedes a threshold level, said microcontroller actuates plurality of LED (Light Emitting Diode) lights 110 configured on said platform 101 to glow for providing optimal illumination to said user.

5) The device as claimed in claim 1, wherein a battery is associated with said device for powering up electrical and electronically operated components associated with said device.