Description:FIELD OF THE INVENTION

[0001] The present invention relates to an integrated safe access door for vehicles that is capable of enhancing passenger safety inside a vehicle by providing a secured door that automatically responds to the real-time environmental conditions and user position within the vehicle.

BACKGROUND OF THE INVENTION

[0002] Doors in vehicles are essential for both safety and functionality. They provide a secure entry and exit point for passengers while ensuring their protection in the event of an accident. The structure of a vehicle door is designed to absorb impact, minimizing injury during collisions. Additionally, doors help to maintain the vehicle’s structural integrity and contribute to the overall aerodynamics. Beyond safety, doors also offer comfort by keeping the interior of the vehicle secure from external elements like weather and theft.

[0003] Traditional methods of safe access doors for vehicles include manually operated hinged doors with mechanical locks and handles. These doors often feature simple latching arrangement and reinforced frames to ensure passenger safety. Child safety locks and rubber sealing strips are used for added protection and comfort. While basic, these traditional designs have reliably provided secure entry and exit, offering durability and ease of use without relying on complex electronics. The main drawbacks of traditional vehicle access doors include limited convenience and security features. Manual operation is cumbersome, especially in emergencies or challenging weather conditions. Mechanical locks are more prone to wear and breakage over time, compromising safety.

[0004] Furthermore, in countries like India, tuk-tuks or auto-rickshaws are a popular mode of transportation due to their affordability and maneuverability in congested areas. However, these vehicles often lack conventional doors or have minimal door structures, leading to several safety drawbacks, especially in urban and high-traffic environments.

[0005] One of the primary concerns is the lack of physical barriers, or barriers which are sturdy enough to prevent passengers from being ejected during sudden braking, sharp turns, or collisions. The open design or half-height doors commonly seen in auto-rickshaws offers little to no protection during side impacts or rollovers. Passengers, especially children, are at greater risk of falling out or being injured due to the absence of secure enclosures.

[0006] Additionally, the minimal door structures provide limited protection against theft or unauthorized access, particularly in crowded public areas. There’s also inadequate shielding from external elements like rain, dust, or pollution, which can compromise passenger comfort and health.

[0007] From a structural standpoint, the lack of reinforced doors means that auto-rickshaws do not contribute significantly to the vehicle's overall crashworthiness, exposing occupants to higher injury risks in the event of an accident. Despite improvements in urban mobility, the traditional design of auto-rickshaws remains a critical safety gap, calling for innovation in door systems that balance openness with essential protection.

[0008] US20160300410A1 discloses a vehicle door access system configured to control access to a vehicle via the vehicle door, the vehicle door access system comprising an image capture device configured to capture a first image of a user external to the vehicle and a second moving image of the user external to the vehicle; a comparator module configured to compare the first captured image of the user with a first user identifier and to compare the second captured image with a second user identifier which is a moving image of the user; and a door lock control module configured to control the lock status of the vehicle door if both the first and second captured images, respectively, correspond to the first and second user identifiers.

[0009] EP0145306A2 discloses a vehicle door assembly that is arranged so that the door outer panel is only fitted to the door as a last stage in manufacture, and before such mounting the internal door components are fastened onto the door inner panel from the "outside" of the door. The outer panel is then simply a skin, and can be made from a plastics material. The outer panel is the only part which really needs to be coloured to match the vehicle body, and the rest of the door assembly can then be painted a standard colour, to facilitate overall vehicle assembly. As a result of this possibility, vehicles and doors for the vehicle can be assembled separately, only being brought together towards the end of overall vehicle assembly.

[0010] Conventionally, many doors have been developed for improving vehicle access however, such doors often lack control features and adaptive response required for enhanced safety and convenience to the passengers. Additionally, these existing doors also lack the ability to dynamically respond to environmental conditions, user positioning, and potential impact events, thereby limiting their effectiveness in ensuring real-time safety and operational efficiency.

[0011] In order to overcome the aforementioned drawbacks, there exists a need in the art to develop a door that requires to be capable of monitoring weight of a passenger applied onto the door of the vehicle and providing a means for maintaining a safe position to enhance safety within the vehicle. Additionally, the developed door needs to be capable of detecting the presence of moisture over the door of the vehicle and providing a means for preventing water accumulation over the door, thus providing unrestricted view to the user.

OBJECTS OF THE INVENTION

[0012] The principal object of the present invention is to overcome the disadvantages of the prior art.

[0013] An object of the present invention is to develop a door that is capable of enhancing passenger safety inside a vehicle by providing a secured door that automatically responds to the real-time environmental conditions and user position within the vehicle.

[0014] Another object of the present invention is to develop a door that is capable of monitoring weight of a passenger applied onto the door of the vehicle and accordingly providing a means for maintaining a safe position, thus enhancing safety within the vehicle.

[0015] Yet another object of the present invention is to develop a door that is capable of detecting the presence of moisture over the door of the vehicle and accordingly providing a means for preventing water accumulation over the door, thus providing unrestricted view to the user.

[0016] A further object of the present invention is to provide a door featuring electrochromic transparency switching, allowing the door to adjust its opacity or transparency in response to ambient light and temperature conditions, thus enhancing visibility, thermal comfort, and privacy for the passenger.

[0017] Another object of the instant invention is to provide a door for a vehicle, capable of repelling ambient moisture, in the form of rain to prevent ingress of moisture into an interior of the vehicle.

[0018] Yet another object of the present invention is to conceptualize a door configured with a means to provide cushioning in order to protect against impacts during vehicular mishaps.

[0019] 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

[0020] The present invention relates to an integrated safe access door for vehicles that is capable of monitoring weight of a passenger applied onto the door of the vehicle and accordingly providing a means for maintaining a safe position, thus enhancing safety within the vehicle.

[0021] According to an aspect of the present invention, an integrated safe access door for vehicles comprises of a segmented panel that is adapted to be installed with an access way of a vehicle, the segmented panel includes a lower segment and an optically adjustable upper segment installed slidably with the lower segment, at least one retractable hydrophobic layer is provided over the segmented panel to prevent accumulation of water over the segmented panel, a sensing unit is installed with the segmented panel to detect an ambient light level and temperature to accordingly cause the electrochromic member to alter the transparency of the upper segment to limit or allow a specific quantity of light to pass through the upper segment to maintain a predefined light level and temperature in the vehicle, a pressure sensor is embedded in a lower segment to detect unintentional force applied on an inward surface of the lower segment to cause a lock mounted with the lower segment to extend and engage with a cavity formed in a surface of the vehicle to prevent unintended opening of the segmented panel, a plurality of weight sensors is embedded along the lower segment to detect a weight of a passenger applied onto the segmented panel to cause a pushing unit that is installed in the lower segment to extend and nudge the passenger to maintain a safe position, a sensing module is embedded on an outwards surface of the segmented panel to detect an impact force exceeding a first threshold value and an impact force exceeding a second threshold value and a tilt of the vehicle exceeding a threshold tilt, an inflatable air bladder is provided along an inward surface of the lower segment that is inflated upon detection of the impact force exceeding the second threshold value for safety of the passengers, a detection module is configured with a control unit to receive data from the sensing module to determine a magnitude of inflation of the air bladder to accordingly cause an actuation of the air compressor.

[0022] 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

[0023] 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 a front view of an integrated safe access door for vehicles; and
Figure 2 illustrates a rear view of the integrated safe access door for vehicles.

DETAILED DESCRIPTION OF THE INVENTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The present invention relates to an integrated safe access door for vehicles that is capable of monitoring the presence of moisture over the door of the vehicle and accordingly providing a means for preventing water accumulation over the door, thus providing unrestricted view to the user.

[0028] Referring to Figure 1 and 2, a front view of an integrated safe access door for vehicles and a rear view of the integrated safe access door for vehicles are illustrated, respectively, comprising a segmented panel 101 adapted to be installed with an access way of a vehicle 102, a lower segment 103 and an optically adjustable upper segment 104 installed slidably with the lower segment 103, at least one retractable hydrophobic layer 105 provided over the segmented panel 101, a pair of sliding units 106 provided along opposing edges of the segmented panel 101, a lock 107 mounted with the lower segment 103 having sliding means 108, a plurality of perforations 109 is disposed along the upper segment 104, a sensing module 110 embedded on an outwards surface of the segmented panel 101 and a sensing unit 201 installed with the segmented panel 101.

[0029] Figure 1 and 2 further illustrates a pushing unit 202 installed in the lower segment 103, a bar 203 slidable integrated in a grooved, an inflatable air bladder 204 provided along an inward surface of the lower segment 103, the upper segment 104 is encased within the lower segment 103 by means of a sliding arrangement 205, a plurality of knobs 206 disposed over a surface of the lower segment 103, a sliding button 207 position over the lower segment 103, an audio alert unit 208 mounted with the segmented panel 101, an air compressor 209 is provided within a cabinet 210 attached with the segmented panel 101, an extended member 211 attached with the lower segment 103.

[0030] The door disclosed herein employs a segmented panel 101. This segmented panel 101 is adapted to be installed with an access way of a vehicle 102. The segmented panel 101 features the segmented panel 101 designed for installation in the access way of a vehicle 102, such as a door. The segmented panel 101 includes a lower segment 103 and an optically adjustable upper segment 104 that is installed slidably with the lower segment 103.

[0031] The segmented panel 101 is designed in accordance with a cross-sectional shape of the access way of the vehicle 102, in order to seal the access way completely in at least one direction, such as in the lateral direction of the access way to provide a barrier between the interior and exterior of the vehicle 102.

[0032] In another embodiment of the present invention, the segmented panel 101 is constructed to cover the entire opening of the access way to provide a complete separation between the interior and the exterior of the vehicle 102.

[0033] The lower segment 103 is of an opaque construction. The opaque construction of the lower segment 103 refers to a material that prevents the transmission of light, making the lower segment 103 non-transparent or non-translucent. This characteristic is preferably achieved by using materials like solid plastics or metals which block visibility through the lower segment 103. This opaque construction ensures that the lower part of the segmented panel 101 remains visually concealed, enhancing security.

[0034] The opaque construction of the lower segment 103 of the segmented panels 101 provides privacy to the passengers travelling in the vehicle 102. In an embodiment of the present invention, the lower segment 103 is constructed of a material similar to the material of construction of the body of the vehicle 102 in order to provide a seamless aesthetic to the vehicle 102. In accordance with the body of the vehicle 102, the lower segment 103 is made of a metallic material or a polymer.

[0035] The upper segment 104 is made up of an electrochromic member. This member is optically adjusted in accordance with a preferred transparency. The upper segment 104 consists of the electrochromic member, which is a material capable of changing the optical properties, such as tint or transparency, when a voltage is applied. This upper segment 104 is designed to dynamically adjust the transparency level. When voltage is applied, ions move between the electrochromic layer and the counter electrode, triggering a reversible color change.

[0036] An input unit is attached with the lower segment 103 of the segmented panel 101. The input unit facilitates selection of transparency of the upper segment 104. The input unit consists of a sliding button 207 that is positioned over the lower segment 103. The translation of the sliding button 207 alters the transparency of the upper segment 104 by varying the voltage supplied to the upper segment 104. The sliding button 207 operates using a linear potentiometer for adjusting the transparency of the upper segment 104. As the user slides the sliding button 207 along the track on the lower segment 103, the position of the sliding button 207 moves a contact wiper along a resistive strip within the potentiometer. This movement changes the resistance value, which is directly linked to a voltage divider circuit. The varying output voltage from this circuit is then supplied to the electrochromic member in the upper segment 104. Depending on the voltage level, the electrochromic material changes the optical state, becoming more or less transparent.

[0037] The input unit is specifically designed to have a tactile nature of interaction in order to enable passengers travelling in the vehicle 102 to access and intricately manipulate features of the door including adjusting the transparency of the upper segment 104, based on tactile feel instead of being required to look at the means of interaction.

[0038] The upper segment 104 is encased within the lower segment 103 by means of a sliding arrangement 205. The sliding arrangement 205 consist of a sliding rail and a slidable member connected to the sliding rail. The slidable member is attached to the lower segment 103 and sliding rail on both sides to make the upper segment 104 slide. The slidable member is attached to a motor which provides movement to the member in a bi-directional manner.

[0039] At least one retractable hydrophobic layer 105 is provided over the segmented panel 101 for preventing the accumulation of water over the segmented panel 101. The retractable hydrophobic layer 105 is a specialized protective film to actively prevent the accumulation of water, such as rain. This hydrophobic layer 105 is coated with a hydrophobic material, such as a fluoropolymer that repels water by reducing surface energy, causing water droplets to bead up and roll off rather than spread out. The retractable arrangement allows this hydrophobic layer 105 to extend over the segmented panel 101 when protection is needed.

[0040] The hydrophobic layer 105 is installed over the segmented panel 101 by means of a pair of sliding units 106. The sliding units 106 are provided along opposing edges of the segmented panel 101. The sliding units 106 function as mechanical assemblies that enable the hydrophobic layer 105 to be smoothly and securely positioned over the segmented panel 101. Each sliding unit 106 comprises a guided rail unit that is integrated with a movable track. The hydrophobic layer 105 is mounted onto these carriages, allowing it to traverse laterally across the segmented panel 101. When actuated, the sliding units 106 guide the hydrophobic layer 105 along the rails, ensuring uniform coverage. This design ensures that the hydrophobic layer 105 is easily deployed or retracted as needed, maintaining surface protection.

[0041] In an embodiment of the instant invention, the hydrophobic layer 105 is selected to be constructed from one or more of a plurality of hydrophobic materials including Polytetrafluoroethylene, Silicone Rubber, Polypropylene (PP), Polyethylene (PE), Fluorinated Polymers, and a combination thereof.

[0042] A manual control means is provided over a surface of the lower segment 103 of the segmented panel 101. The manual control means is used to receive input for translation of the upper segment 104 in and out of the lower segment 103 and also the deployment of the hydrophobic layer 105 over the segmented panel 101 by the sliding units 106. The manual control means consists of a plurality of knobs 206 for controlling the positions of the upper segment 104 and the hydrophobic layer 105. Each knob 206 is mechanically connected to a set of gears that control the movement of the upper segment 104 relative to the lower segment 103. When the knob 206 is turned, it translates rotational motion into linear motion, which either pushes or pulls the upper segment 104 in or out of the lower segment 103, depending on the direction of rotation.

[0043] Another knob 206 controls the sliding units 106 that are responsible for deploying the hydrophobic layer 105. Turning these knobs 206 activates a series of motors that move the sliding units 106 over the surface of the segmented panel 101, releasing the hydrophobic layer 105. Each knob 206 is typically calibrated to correspond to specific movement parameters, allowing the user to independently control the positioning of both the upper segment 104 and the hydrophobic layer 105, ensuring precise and coordinated actions.

[0044] The manual control means is particularly conceived to have a tactile manner of interaction in order to enable passengers travelling in the vehicle 102 to access and intricately manipulate features of the door such as deployment of the hydrophobic layer 105, based on tactile feel instead of being required to look at the means of interaction.

[0045] A plurality of perforations 109 is disposed along the upper segment 104 for facilitating air passage. These perforations 109 serve as an important feature for enabling efficient air circulation through the segmented panel 101. These perforations 109 are strategically positioned to allow air to pass through the upper segment 104 without obstructing the structural integrity. As air moves through these perforations 109, the proper ventilation is maintained, preventing the buildup of heat and moisture. By facilitating air passage, the perforations 109 also play a role in the thermal regulation of the vehicle 102.

[0046] In an embodiment of the present invention, the perforations 109 are provided with a means to partially or completely seal the perforations 109 for allowing adjustment of a magnitude of ventilation enabled by the perforation 109 or completely seal the perforations 109 for a complete lack of ventilation.

[0047] The segmented panel 101 employs a sensing unit 201 for detecting an ambient light level and temperature to accordingly cause the electrochromic member to alter the transparency of the upper segment 104. The sensing unit 201 includes a photodiode-based ambient light sensor and a temperature sensor. The transparency of the upper segment 104 is altered to limit or allow a specific quantity of light to pass through the upper segment 104 to maintain a predefined light level and temperature in the vehicle 102. The photodiode-based ambient light sensor operates by utilizing a photodiode, which is a semiconductor that generates a current when exposed to light. The working principle is based on the phenomenon of photoconductivity. When light strikes the photodiode, it excites electrons within the semiconductor material, causing an increase in current flow. The amount of current generated is directly proportional to the intensity of the incoming light.

[0048] The sensor measures this current and converts it into an electrical signal, which is then processed by the control unit. This information is used to determine the ambient light level and adjust the electrochromic member accordingly to change the transparency of the upper segment 104. The temperature sensor functions based on a thermistor, which is a type of resistor whose resistance changes with temperature. In the case of a Negative Temperature Coefficient (NTC) thermistor, the resistance decreases as the temperature increases. When the temperature changes, the resistance of the thermistor shifts, which leads to a corresponding change in the voltage across the sensor. This voltage change is measured by the control unit. The electrochromic member is then accordingly adjusted to modify the transparency of the upper segment 104 to maintain thermal comfort.

[0049] The sensing unit 201 further comprises of a moisture sensor to detect a threshold moisture level over the segmented panel 101 to cause the sliding units 106 to deploy the hydrophobic layer 105. The moisture sensor works based on the principle of electrical resistance, where it utilizes a pair of electrodes that are placed on the surface of the segmented panel 101. These electrodes are designed to be sensitive to the presence of moisture, and their resistance changes when exposed to water or humidity. When moisture accumulates over the segmented panel 101, it causes the conductive properties between the electrodes to change, preferably, the resistance decreases as the moisture level rises. This change in resistance is detected by the sensor’s circuitry, which converts the variation into an electrical signal. This signal is continuously monitored, and once the moisture level surpasses a predetermined threshold, the sensor triggers the sliding units 106 to deploy the hydrophobic layer 105. The hydrophobic layer 105 creates the protective barrier to repel moisture.

[0050] An audio alert unit 208 is provided with the segmented panel 101 to provide audio feedback regarding the automated deployment of the hydrophobic layer 105. In an embodiment of the present invention, the audio alert unit 208 used herein is a speaker. The speaker works by converting the electrical signal into the audio signal. The speaker 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 provides audio feedback regarding the automated deployment of the hydrophobic layer 105.

[0051] The audio alert unit 208, in combination with the tactile input unit and the manual control means, render the present invention more suitable for passengers who might be visually challenged.

[0052] A user interface is wirelessly associated with the door and configured to be installed with a computing unit (mobile phone, laptop, or other hand-held assistances) accessed by the user. The user is required to access the user interface to control the deployment and transparency of the upper segment 104. The user interface is wirelessly associated with the control unit by means of a communication module which includes, but not limited to Wi-Fi (Wireless Fidelity) module, Bluetooth module, GSM (Global System for Mobile Communication) module.

[0053] The Wi-Fi module contains transmitters and receivers that use radio frequency signals to transmit data wirelessly to the control unit. The wireless module typically includes components such as antennas, amplifiers, and processors to facilitate communication and further connected to networks such as Wi-Fi, Bluetooth, or cellular networks, allowing to exchange information over short or long distances. Once the user input the preferred command, the computing unit wirelessly transmits the user input data back to the control unit.

[0054] A pressure sensor is embedded in the lower segment 103 of the segmented panel 101. This pressure sensor is used to detect unintentional force applied on an inward surface of the lower segment 103 to cause a lock 107 that is mounted with the lower segment 103 to extend and engage with a cavity. The pressure sensor operates using a piezoelectric technique, where the sensor utilizes a piezoelectric material, such as a quartz crystal, that generates an electrical charge in response to applied pressure. When an unintentional force is applied to the inward surface of the lower segment 103, the pressure deforms the piezoelectric material, causing it to produce a small electrical charge proportional to the magnitude of the force. This electrical charge is detected by the sensor’s circuitry, which then converts it into a voltage signal. Once the force surpasses a certain threshold, the signal is processed by the control unit, triggering to extend the lock 107 for engaging with the cavity.

[0055] The lock 107 consists of an extended member 211 that is attached to the lower segment 103 by use of sliding means 108. The extended member 211 in the lock 107 functions as a movable component that engages with the lower segment 103 through sliding means 108, enabling secure attachment. The cavity is formed in a surface of the vehicle 102 to prevent the unintended opening of the segmented panel 101. The cavity acts as a hollowed-out area that interacts with locking components, that is the extended member 211, to secure the segmented panel 101 in a closed position. When the segmented panel 101 is in place, the extended member 211 fits into the cavity, creating an interlock that resists accidental displacement due to vibrations, impacts, or other external forces. This ensures that the segmented panel 101remains firmly shut during vehicle 102 operation, enhancing both safety and durability by minimizing the risk of unintentional exposure.

[0056] The sliding means 108 in the lock 107 operates by allowing smooth linear movement between the extended member 211 and the lower segment 103. This sliding means 108 preferably involves a track integrated into both the extended member 211 and the lower segment 103. The track is designed to guide the movement of the extended member 211, ensuring it slides in a controlled and precise manner. This sliding action ensures that the lock 107 engages or disengages with minimal resistance, facilitating secure and efficient locking or unlocking.

[0057] A plurality of weight sensors is positioned along the lower segment 103 to detect the weight of a passenger applied onto the segmented panel 101, thereby triggering a pushing unit 202. The pushing unit 202 is installed within the lower segment 103 to extend and gently nudge the passenger to maintain a safe position. The plurality of weight sensors operates using the strain gauge technique. Each sensor detects the pressure exerted by the passenger's weight as it is applied to the segmented panel 101. When the passenger leans against the segmented panel 101, the strain gauges within each sensor deform under the applied load, causing a change in electrical resistance. This change is proportional to the amount of weight being exerted. The sensors continuously monitor this change in resistance and, once a certain threshold is reached, send a signal to activate the pushing unit 202. This signal triggers the pushing unit 202, causing it to extend and gently nudge the passenger to maintain a safe and secure position.

[0058] The pushing unit 202 consists of a bar 203 that is slidably integrated in a grooved formed in the lower segment 103 to extend and push the passenger. This pushing unit 202 allows the bar 203 to move smoothly along the groove when activated. The groove, preferably designed to guide the bar 203 along a precise path, ensures that the pushing unit 202 extends and retracts in a controlled manner. As the bar 203 moves along the groove, it pushes gently against the passenger, nudging them back into a more secure and optimal position. The smooth sliding assembly of the bar 203 ensures that the motion is gradual and controlled, avoiding any abrupt movements that cause discomfort to the passenger. The entire process is synchronized with the detection from the weight sensors, ensuring the pushing unit 202 only activates when needed to maintain safety.

[0059] A sensing module 110 is positioned on an outward surface of the segmented panel 101. The sensing module 110 includes a pressure sensor and a tilt sensor. This sensing module 110 is used to detect an impact force exceeding a first threshold value and an impact force exceeding a second threshold value and a tilt of the vehicle 102 exceeding a threshold tilt. The pressure sensor within the sensing module 110 operates based on piezoelectric technique. When an impact force is applied to the outward surface of the segmented panel 101, the piezoelectric material within the sensor generates an electrical charge in response to the mechanical stress caused by the force. The magnitude of the charge corresponds directly to the intensity of the impact force. If the applied force exceeds the first threshold value, the sensor detects this change and converts the mechanical pressure into an electrical signal. This signal is then processed and the exact impact force is determined.

[0060] The tilt sensor in the sensing module 110 operates using an accelerometer technique. The sensor measures the angle of tilt of the vehicle 102 relative to a reference axis. Inside the sensor, a small mass is suspended within a housing, and as the vehicle 102 tilts, the mass moves relative to its position due to gravity. This movement changes the capacitance within the sensor. The change in capacitance is then converted into an electrical signal that corresponds to the tilt angle. The upper segment 104 is caused to extend and close the access way of the vehicle 102 upon detection of the tilt of the vehicle 102, exceeding a second threshold tilt. The impact force exceeding the first threshold value causes the alert unit 208 to generate an audible alert.

[0061] An inflatable air bladder 204 is provided along an inward surface of the lower segment 103. Upon detection of the impact force exceeding the second threshold value, the inflatable air bladder 204 is inflated for the safety of the passengers. The air bladder 204 is extended upon detection of the tilt of the vehicle 102 exceeding a threshold tilt for the safety of the passengers. The inflatable air bladder 204 is a safety arrangement that is designed to protect passengers in the event of a significant impact. The air bladder 204 is inflated by an air compressor 209 that is provided within a cabinet 210 attached with the segmented panel 101. The cabinet 210 is configured to store the air bladder 204 in a deflated state. Upon the detection of an impact force exceeding a predefined threshold, a signal is sent to the bladder’s air compressor 209. The air bladder 204, initially stored in a deflated state, rapidly inflates to absorb the impact force. The expansion of the air bladder 204 creates a cushioning effect, reducing the force transferred to passengers, thereby minimizing potential injuries. The air bladder 204 is designed to inflate within a fraction of a second, ensuring it provides immediate protection during an accident or collision.

[0062] A detection module is configured with a control unit to receive data from the sensing module 110. The detection module then determines a magnitude of inflation of the air bladder 204 to accordingly cause an actuation of the air compressor 209. The control unit analyzes the magnitude of the detected impact force by comparing the incoming data with the predefined threshold values. Based on this analysis, the detection module calculates the required magnitude of inflation for the air bladder 204 by the air compressor 209. The air compressor 209, located within a cabinet 210 attached to the segmented panel 101, is responsible for providing the necessary air pressure to inflate the air bladder 204. The air compressor 209 is activated automatically upon the detection of an impact force that exceeds the specified threshold. When triggered, the air compressor 209 draws in air from the surrounding environment and pressurizes it. The compressed air is then directed to the air bladder 204 via a series of valves and pipes. The air is injected at high pressure into the air bladder 204, causing it to inflate rapidly. The cabinet 210 housing the air compressor 209 is designed to store the air bladder 204 in a deflated state, ensuring that it remains compact and ready for deployment.

[0063] For supplying power to electrical and electronically operated components, a battery is associated with the door. The battery powers electrical and electronic components by converting stored chemical energy into electrical energy. The battery’s terminals provide a voltage difference, allowing current to flow through circuits that supplies consistent energy to actuate and operate components like motors, sensors and control unit, ensuring seamless functionality.

[0064] The present invention works best in the following manner, where a segmented panel 101 is disclosed that is adapted to be installed with the access way of the vehicle 102. The door consists of the lower segment 103 and the optically adjustable upper segment 104 that is installed slidably with the lower segment 103. The lower segment 103 is of the opaque construction. The upper segment 104 is constructed of the electrochromic member, enabled for optical adjustment in accordance with the preferred transparency. The input unit is provided with the lower segment 103 to facilitate selection of the transparency of the upper segment 104. The input unit, comprises of the sliding button 207 that is positioned over the lower segment 103. The translation of the sliding button 207 alters the transparency of the upper segment 104 by varying the voltage supplied to the upper segment 104. The upper segment 104 is encased within the lower segment 103 by means of the sliding arrangement 205. The retractable hydrophobic layer 105 is provided over the segmented panel 101 to prevent accumulation of water over the segmented panel 101. The hydrophobic layer 105 is installed over the segmented panel 101 by means of the pair of sliding units 106 that is provided along opposing edges of the segmented panel 101. The manual control means is disposed over the surface of the lower segment 103 to receive input for translation of the upper segment 104 in and out of the lower segment 103 and the deployment of the hydrophobic layer 105 over the segmented panel 101 by the sliding units 106. The manual control means includes the plurality of knobs 206 for controlling the positions of the upper segment 104 and the hydrophobic layer 105. The plurality of perforations 109 is disposed along the upper segment 104 to facilitate air passage. The sensing unit 201 is installed with the segmented panel 101 to detect the ambient light level and temperature to accordingly cause the electrochromic member to alter the transparency of the upper segment 104. The sensing unit 201, comprises of the photodiode-based ambient light sensor and the temperature sensor. The transparency of the upper segment 104 is altered to limit or allow the specific quantity of light to pass through the upper segment 104 to maintain the predefined light level and temperature in the vehicle 102. The sensing unit 201 further comprises of the moisture sensor to detect the threshold moisture level over the segmented panel 101 to cause the sliding units 106 to deploy the hydrophobic layer 105. The audio alert unit 208 is mounted with the segmented panel 101 to provide audio feedback regarding the automated deployment of the hydrophobic layer 105. The user interface is adapted to be installed with the computing unit to wirelessly control deployment and transparency of the upper segment 104.

[0065] In continuation, the pressure sensor detects the unintentional force applied on the inward surface of the lower segment 103 to cause the lock 107 that is mounted with the lower segment 103 to extend and engage with the cavity. The lock 107 consists of the extended member 211 that is attached to the lower segment 103 by means of the sliding means 108. The cavity is formed in the surface of the vehicle 102 to prevent the unintended opening of the segmented panel 101. The plurality of weight sensors is embedded along the lower segment 103 to detect the weight of the passenger that is applied onto the segmented panel 101, to cause the pushing unit 202 that is installed in the lower segment 103 to extend and nudge the passenger to maintain the safe position. The pushing unit 202 includes the bar 203 slidable integrated in the grooved formed in the lower segment 103 to extend and push the passenger. The sensing module 110 is embedded on the outward surface of the segmented panel 101. The sensing module 110, comprises of the pressure sensor and the tilt sensor. This sensing module 110 is used to detect the impact force exceeding the first threshold value and the impact force exceeding the second threshold value and the tilt of the vehicle 102 exceeding the threshold tilt. The upper segment 104 is caused to extend and close the access way of the vehicle 102 upon detection of the tilt of the vehicle 102, as detected by the sensing module 110, exceeding the second threshold tilt. The impact force exceeding the first threshold value causes the alert unit 208 to generate the audible alert. The inflatable air bladder 204 is provided along the inward surface of the lower segment 103, inflated upon detection of the impact force exceeding the second threshold value for safety of the passengers. The air bladder 204 is extended upon detection of the tilt of the vehicle 102 exceeding the threshold tilt for the safety of the passengers. The air bladder 204 is inflated by the air compressor 209 that is provided within the cabinet 210 attached with the segmented panel 101. The cabinet 210 is configured to store the air bladder 204 in the deflated state. The detection module is configured with the control unit to receive data from the sensing module 110 to determine the magnitude of inflation of the air bladder 204 to accordingly cause the actuation of the air compressor 209.

[0066] In an exemplary implementation of the present invention, the door is installed at an access way of a three-wheeled passenger vehicle 102 colloquially known as an "auto rickshaw". The invention is beneficial for the auto-rickshaws that often operate in dense traffic, unpredictable weather, and open cabin environments, which expose passengers to environmental hazards and safety risks. The auto rickshaws typically have open or partially covered sides, exposing passengers to rain, dust, glare, and external impact risks, in response to which, the present invention creates a sealed yet breathable enclosure that shields passengers from environmental elements while maintaining visibility and airflow, significantly improving ride comfort and safety. The auto rickshaws lack protection during external impacts or collisions, while in the present invention, the auto rickshaw is automatically cushioned in real time against collisions, reducing shock, minimizing damage, and safeguarding passengers during sudden impacts. The safe access door prevents unsafe passenger behavior like sitting or leaning on the gate, reducing the risk of falls or injuries during motion of the auto rickshaw. The modular design also offers natural ventilation, improved privacy, and thermal comfort, making rides more pleasant in hot or rainy conditions.

[0067] The present invention is industrially applicable in the field of transportation, specifically in the manufacturing and retrofitting of three-wheeled passenger carts, auto-rickshaws, and similar lightweight vehicles used in urban and semi-urban environments. The smart modular safety door can be integrated into new vehicle designs or adapted to existing models to enhance passenger safety, comfort, and operational efficiency.

[0068] Its intelligent response to environmental condition, such as rain, sunlight, and temperature combined with real-time passenger behavior monitoring, makes it highly suitable for regions with varying climates and high passenger turnover. The electrochromic transparency switching feature ensures energy-efficient light and heat control, reducing the need for additional cooling systems in hot climates.

[0069] Moreover, the system’s compatibility with sensor-driven automation, mobile control interfaces, and passive mechanical components enables scalable production using existing manufacturing technologies. The modular nature of the door also facilitates easy assembly, maintenance, and customization, making it commercially viable for mass deployment in public and private transport fleets.

[0070] Accordingly, the invention offers a practical, cost-effective, and safety-enhancing solution for improving passenger vehicle 102 design in both emerging and developed markets.

[0071] 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 integrated safe access door for vehicles, comprising:

i) a segmented panel 101 adapted to be installed with an access way of a vehicle 102, the segmented panel 101 comprising a lower segment 103 and an optically adjustable upper segment 104 installed slidably with the lower segment 103;
ii) at least one retractable hydrophobic layer 105 provided over the segmented panel 101 to prevent accumulation of water over the segmented panel 101;
iii) a sensing unit 201 installed with the segmented panel 101 to detect an ambient light level and temperature;
iv) a pressure sensor embedded in a lower segment 103;
v) a plurality of weight sensors embedded along the lower segment 103 to detect a weight of a passenger applied onto the segmented panel 101, to cause a pushing unit 202 installed in the lower segment 103 to extend and nudge the passenger to maintain a safe position;
vi) a sensing module 110 embedded on an outwards surface of the segmented panel 101 to detect an impact force exceeding a first threshold value and an impact force exceeding a second threshold value and a tilt of the vehicle 102 exceeding a threshold tilt;
vii) an inflatable air bladder 204 provided along an inward surface of the lower segment 103, inflated upon detection of the impact force exceeding the second threshold value for safety of the passengers; and
viii) a detection module configured with a control unit to receive data from the sensing module 110 to determine a magnitude of inflation of the air bladder 204 to accordingly cause an actuation of the air compressor 209,
wherein the system dynamically adjusts the transparency of the upper segment 104 via an electrochromic member in response to ambient light and temperature detected by the sensing unit 201, and wherein the system detects unintentional force on the inner surface of the lower segment 103 using a pressure sensor, and activates a lock 107 mounted with the lower segment 103 to engage with the vehicle 102 structure and prevent unintended opening of the access segmented panel 101.

2) The door as claimed in claim 1, wherein the hydrophobic layer 105 is installed over the segmented panel 101 by means of a pair of sliding units 106 provided along opposing edges of the segmented panel 101.

3) The door as claimed in claim 1, wherein the upper segment 104 is encased within the lower segment 103 by means of a sliding arrangement 205.

4) The door as claimed in claim 1, wherein a manual control means disposed over a surface of the lower segment 103, to receive input for translation of the upper segment 104 in and out of the lower segment 103 and the deployment of the hydrophobic layer 105 over the segmented panel 101 by the sliding units 106.

5) The door as claimed in claim 1, wherein the manual control means comprises a plurality of knobs 206 for controlling the positions of the upper segment 104 and the hydrophobic layer 105.

6) The door as claimed in claim 1, wherein the lower segment 103 is of an opaque construction.

7) The door as claimed in claim 1, wherein the upper segment 104 is constructed of an electrochromic member, enabled for optical adjustment in accordance with a preferred transparency.

8) The door as claimed in claim 1, wherein an input unit provided with the lower segment 103 to facilitate selection of transparency of the upper segment 104.

9) The door as claimed in claim 1, wherein the input unit comprises a sliding button 207 position over the lower segment 103, the translation of the sliding button 207 configured to alter the transparency of the upper segment 104 by varying the voltage supplied to the upper segment 104.

10) The door as claimed in claim 1, wherein a plurality of perforations 109 is disposed along the upper segment 104 to facilitate air passage.

11) The door as claimed in claim 1, wherein a user interface adapted to be installed with a computing unit to wirelessly control deployment and transparency of the upper segment 104.

12) The door as claimed in claim 1, wherein the sensing unit 201 comprises a photodiode-based ambient light sensor and a temperature sensor.

13) The door as claimed in claim 1, wherein the sensing unit 201 further comprises a moisture sensor to detect a threshold moisture level over the segmented panel 101 to cause the sliding units 106 to deploy the hydrophobic layer 105.

14) The door as claimed in claim 1, wherein the lock 107 comprises of an extended member 211 attached with the lower segment 103 by means of sliding means 108.

15) The door as claimed in claim 1, wherein the pushing unit 202 comprises a bar 203 slidable integrated in a grooved formed in the lower segment 103 to extend and push the passenger.

16) The door as claimed in claim 1, wherein the air bladder 204 is extended upon detection of the tilt of the vehicle 102 exceeding a threshold tilt for safety of the passengers.

17) The door as claimed in claim 1, wherein the air bladder 204 is inflated by an air compressor 209 is provided within a cabinet 210 attached with the segmented panel 101, the cabinet 210 configured to store the air bladder 204 in a deflated state.

18) The door as claimed in claim 1, wherein the sensing module 110 comprises a pressure sensor and a tilt sensor.

19) The door as claimed in claim 1, wherein the upper segment 104 is caused to extend and close the access way of the vehicle 102 upon detection of the tilt of the vehicle 102, as detected by the sensing module 110, exceeding a second threshold tilt.