Description:FIELD OF THE INVENTION

[0001] The present invention relates to a door locking system that enables efficient, safe, and controlled access management in residential, commercial, and institutional environments.

BACKGROUND OF THE INVENTION

[0002] The secure management of entry and exit in residential, commercial, and institutional settings requires precise control, reliable authentication, safe operation, and efficient coordination to ensure user convenience without compromising security. These systems aim to reduce reliance on manual effort, minimize risks of unauthorized access, and enhance both efficiency and safety in managing controlled spaces. Accuracy in authentication and consistency in locking or unlocking actions are essential for maintaining robust security, preventing misuse, and ensuring compliance with safety and privacy standards. Poorly controlled systems result in weak security, unreliable access, operational delays, and potential breaches of safety.

[0003] Traditionally, the locking and unlocking of doors has depended on mechanical methods such as using conventional keys, manual latches and padlocks operated directly by users. These approaches require physical effort and constant user intervention to manage access, relying on human judgment and proper handling of keys to ensure security. Manual locking methods are not only inconvenient but also susceptible to errors including misplaced and duplicated keys, forgotten locking, accidental locking out of authorized users, and difficulty in managing multiple entries. Additionally, these traditional methods provide limited protection against tampering, forced entry, and unauthorized duplication, posing security risks and compromising reliability. As a result, these systems lead to weak access control, increased chances of unauthorized entry, and frequent user inconvenience.
[0004] US8610535B2 discloses a door locking system configured to lock and unlock a door frame of a cabinet is provided. The door locking system includes a handle rod; a digital or mechanical door sensor configured to detect whether the door frame of the cabinet is open or closed; and a latch configured to lock the handle rod, the latch being connected to and controlled by a lock mechanism. The lock mechanism includes a mechanical module and an electromechanical module. The mechanical module is configured to actuate the latch to lock and unlock the handle rod, and configured to grant the electromechanical module control over the latch to lock and unlock the handle rod.

[0005] US20140265359A1 discloses a door lock system which is provided with a position sensing device configured to be coupled to a drive shaft of a lock device. The position sensing device senses position of the drive shaft and assists in locking and unlocking a lock of a lock device. An engine is provided with a memory coupled to the positioning sensing device. A circuit is coupled to the engine and an energy source is coupled to the circuit. A device converts energy into mechanical energy and is coupled to the circuit, positioning sensing device and the drive shaft. The device that converts energy is coupled to the energy source to receive energy from the energy source.

[0006] Conventionally, many systems have been developed that are capable of locking and unlocking doors while ensuring only basic levels of security and access control. However, these systems are incapable of automating the access process and are unable to reduce the manual effort and delays associated with repetitive locking, unlocking, and user verification. Additionally, existing systems lacks the ability to safeguard against tampering, unauthorized access attempts limiting their effectiveness in security applications.

[0007] In order to overcome the aforementioned drawbacks, there exists a need in the art to develop a system that requires to be capable of providing secure and controlled access management by enhancing security, convenience, and user interaction. The developed system should enable accurate user authentication, and provides tamper resistance with real-time monitoring to maintain the security, safety, and convenience of the user.

OBJECTS OF THE INVENTION

[0008] An object of the present invention is to develop a system that is capable of providing secure and controlled access management, ensuring reliable user authentication while maintaining safety and convenience in various environments.

[0009] Another object of the present invention is a system that is capable of detecting end positions of the lock to prevent overrun, minimize mechanical wear, and ensure reliable operation.

[0010] Another object of the present invention is a system that is capable of detecting physical interference for preventing unauthorized access and ensure secure operation.

[0011] Another object of the present invention is a system that is capable of verifying user identity through unique biological characteristics, ensuring accurate authentication and secure access management.

[0012] Yet another object of the present invention is a system that is capable of enabling access through scannable digital codes, facilitating secure guest entry, accurate event logging, and timely user notification.

[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 a door locking system that facilitates efficient, precise, and secure management of entry and exit in residential, commercial, and institutional settings. The system ensures reliable user authentication, controlled locking and unlocking operations, and protection against unauthorized access, while maintaining safety and convenience of user.

[0015] According to an aspect of the present invention, a door locking system comprises of a hollow lock body mounted on a door, a cam-driven bolt linked to a cam disc for rotating between a locked position and an unlocked position, a high-torque servo motor coupled with the cam disc for driving rotational motion, a corresponding latch slot on a door frame for receiving the bolt, a pair of biasing springs mounted on either side of the bolt for compressing and expanding to support, balance and dampen linear motion of the bolt, a Passive Infrared (PIR) sensor mounted on the body for detecting proximal human presence near the door lock, a motorized protective lid on the body for selectively covering and uncovering the authentication interface, a biometric fingerprint scanner embedded within a secured recessed compartment of the body for user authentication.

[0016] The system further includes, a capacitive touchscreen interface provided on the external body to display a virtual numeric keypad for PIN (Personal Identification Number)-based access control, a controller to manage and coordinate the operation of the system’s mechanical, electrical, and electronic components, a bolt barrier guide plate within the body for enclosing the bolt to restrict and align linear motion of the bolt, a plurality of limit switches arranged within the body to detect and signal end positions of the bolt, a camera integrated with the body for guest photo capture, a MEMS (Micro-Electro-Mechanical Systems) accelerometer-based tamper detection sensor integrated into the body to detect physical interference, a QR (quick response) code scanner provided with the body for guest access via one-time QR code authentication, an audio guidance module including a speaker for providing step-by-step voice instructions to the user, a user interface inbuilt in a computing unit for accessing events and sending real-time alerts and a communication module with the controller for establishing wireless connectivity.

[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 a door locking system; and
Figure 2 illustrates an inner view of a hollow lock body associated with the system.

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 a door locking system that is capable of locking and unlocking the door in commercial and residential spaces. The system is capable of detecting physical interference and tampering attempts, enabling early identification of unauthorized activity and ensuring the reliability, safety, and integrity of controlled access operations.

[0023] Referring to Figure 1 and 2, an isometric view of a door locking system and an inner view of a hollow lock body associated with the system are illustrated, respectively, comprising a hollow lock body 110 mounted on a door, a cam-driven bolt 109 linked to a cam disc 203, a high-torque servo motor 204 coupled with the cam disc 203, a pair of biasing springs 201 mounted on either side of the bolt 109, a motorized protective lid 101 on the body 110, a biometric fingerprint scanner 102 embedded within a secured recessed compartment 103 of the body 110, a capacitive touchscreen interface 104 provided on the external body 110, a bolt barrier guide plate 202 within the body 110, a QR (quick response) code scanner 105 provided with the body 110 and a speaker 106 on the body 110, a camera 107 integrated with the body 110, a touchscreen interface 108 provided with an outer portion of the body 110.

[0024] The system disclosed herein comprises of a hollow lock body 110 mounted on a door. The hollow lock body 110 is preferably made up of durable and rigid materials that provide sufficient strength, wear resistance, and long term reliability under repeated locking and unlocking operations.

[0025] The hollow lock body 110 includes a cam-driven bolt 109 for executing secure locking and unlocking operations. The cam-driven bolt 109 is made up of high strength, durable material to withstand repeated operations and mechanical stress. The cam-driven bolt 109 is operatively linked to a cam disc 203 for converting the rotational motion into linear displacement, enabling smooth extension and retraction of the bolt 109 to perform secure locking and unlocking operation.

[0026] A Passive Infrared (PIR) sensor is mounted on the body 110 for detecting the presence or movement of a person in proximity to the door lock. The passive infrared (PIR) sensor works on the principle of detecting infrared radiation emitted by objects within its field of view. The passive infrared (PIR) sensor includes pyroelectric crystals for generating an electric charge upon exposure to changes in infrared radiation.

[0027] The passive infrared (PIR) sensor continuously monitors the ambient infrared radiation level, and in the absence of motion, the generated charge remains constant. When a body of different temperature than the surroundings enters the field of view, a rapid change in detected infrared radiation occurs, causing the pyroelectric crystals to generate a corresponding signal indicating motion. The passive infrared (PIR) sensor then communicates these detection signals to the controller, enabling identification of the presence of a user near the locking arrangement.

[0028] A touchscreen interface 108 is provided with an outer portion of the body 110 for facilitating access selection and authentication inputs. Upon receiving the input from the PIR sensor, the controller activates the touchscreen interface 108, prompting the approaching individual to select between authorized user mode and guest access mode. The touchscreen interface 108 comprises multiple layers, including a transparent conductive layer for forming the contact surface for user interaction. Beneath this layer a grid of electrodes disposed in rows and columns are arranged.

[0029] When the user touches the interface, a change in capacitance is produced at the point of contact, altering the electrical field between the electrodes. This change is detected by controller circuitry which is operatively associated with the interface to interpret the position and pressure of the touch input. The controller converts the detected change into digital signals corresponding to user commands, and these signals are subsequently processed by the controller for managing access operations. Upon successful authentication, the user is confirmed as having entered the authorized user mode, enabling secure continuation of the access process.

[0030] A motorized protective lid 101 is installed on the body 110 for selectively concealing and exposing the authentication interface. Upon selection of authorized user mode by the user through the touchscreen interface 108, the controller actuates the motorized protective lid 101 to open in a controlled manner. The motorized protective lid 101 ensures protection of the authentication interface from tampering and environmental exposure, while enhancing the reliability and durability of the locking arrangement.

[0031] A motorized hinge joint is integrated with the lid 101 for covering the authentication interface in a controlled manner. The motorized hinge joint involves the use of an electric motor to control the movement of the hinge and the connected lid 101. The hinge joint provides the pivot axis around which the lid 101 moves during its opening and closing operations. The motor serves as the driving element, converting electrical energy into mechanical energy to generate the torque required for actuation. As the motor rotates, the hinge enables smooth and guided orientation of the lid 101, ensuring that the authentication interface is selectively covered and exposed in a controlled and reliable manner.

[0032] A biometric fingerprint scanner 102 is embedded within a secured recessed compartment 103 of the body 110 for user authentication. Upon selection of authorized user mode, the controller activates the biometric fingerprint scanner 102 to captures unique fingerprint characteristics of the individual and convert them into digital data for authentication. The biometric fingerprint scanner 102 comprises a sensing arrangement which acquires fingerprint details when a user places a finger on the scanner surface.

[0033] The captured fingerprint includes ridge and valley patterns, which are analysed by the controller to generate a corresponding digital template. This template is compared with pre stored fingerprint templates maintained in the database to determine a match. Upon successful verification, the controller actuates the locking arrangement to permit access, and in the absence of a match, the access remains denied. This ensures secure, accurate, and reliable authentication based on the individual’s unique fingerprint pattern.

[0034] The biometric fingerprint scanner 102 is integrated with an audio guidance module for providing real time voice instructions to the user during the authentication process. The audio guidance module includes a speaker 106 for providing step-by-step voice instructions to the user during the authentication process. The speaker 106 is operatively connected to the controller for converting electrical signals into audible sound outputs.

[0035] The speaker 106 includes a diaphragm coupled to a voice coil positioned within a magnetic field. The voice coil generates a varying magnetic field upon receiving electrical signals from the controller, causing displacement of the diaphragm. The displacement of the diaphragm modulates the surrounding air to produce sound waves corresponding to an intended audio output. The generated audio delivers real time alerts, confirm successful execution of access operations, and provides condition specific notifications, assisting the user in monitoring the status of the locking arrangement.

[0036] A capacitive touchscreen interface 104 is installed on the external body 110 for displaying virtual keypads and receiving authentication entries as personal identification numbers (PIN), facilitating secure interaction between the user and the locking arrangement.

[0037] The capacitive touchscreen interface 104 displays a virtual numeric keypad for receiving a personal identification number (PIN) entered by the user. The entered PIN is converted into digital signals and transmitted to the controller for processing. The controller then compares the received PIN with pre stored authentication data maintained in the database. If the comparison result falls within a predefined threshold of accuracy, the controller grants access by actuating the locking arrangement. If the PIN does not match any stored template, the controller denies access and maintains the locked state, ensuring secure and controlled operation of the locking system.

[0038] A high-torque servo motor 204 is operatively coupled with the cam disc 203 for driving rotational motion, enabling precise positioning of the cam disc 203. Upon successful authentication of the user through correct PIN entry, the controller initiates mechanical unlocking operations by transmitting control signals to the servo motor 204.

[0039] The servo motor 204 functions as a controlled rotary actuator that governs the movement of the cam disc 203 with high precision. The high-torque servo motor 204 utilizes an arrangement of a DC (Direct Current) drive arrangement and gears for regulated rotation. When an electrical control signal is supplied, the motor 204 converts it into mechanical torque which is transferred through its gear assembly to rotate the output shaft. This ensures that the cam disc 203 attached to the motor rotates accurately within defined angular limits, preventing sudden impact and minimizing wear.

[0040] The controlled motion of the servo motor 204 allows accurate translation of rotational displacement into linear movement, ensuring reliable engagement and disengagement of the cam-driven bolt 109 while preventing overrun and mechanical wear. The cam disc 203 is eccentrically profiled such that its rotation produces variable contact points against the cam driven bolt 109. When regulated torque from the servo motor 204 is transmitted to its shaft, causing the disc 203 to rotate in controlled angular increments.

[0041] A bolt barrier guide plate 202 is provided within the body 110 for enclosing and guiding the bolt 109 during its linear movement. The guide plate 202 comprises predefined guide grooves for restricting and aligning the linear motion of the bolt. These grooves define the path of the bolt 109 during its displacement, thereby restricting unwanted deviation and ensuring accurate alignment. This allows smooth translation of the bolt, prevents misalignment, minimizes wear, and enhances durability of the locking arrangement.

[0042] As the cam disc 203 rotates between its angular positions, the eccentric surface engages the bolt, translating the rotational movement of the disc into linear motion of the bolt. During clockwise rotation, the disc pushes the bolt 109 forward into a corresponding latch slot to achieve a locked state, while counter clockwise rotation gradually retracts the bolt 109 to enable an unlocked state. The contour of the cam surface ensures smooth progression of the bolt, minimizing friction, vibration, and mechanical stresses during operation. This allows precise control of extension and retraction, ensuring stable engagement and long term durability of the locking arrangement.

[0043] The servo motor 204 is controlled via Pulse Width Modulation (PWM) for regulating its angular position with high precision. The Pulse Width Modulation varies the width of the control pulses within each cycle of a constant frequency signal to generate proportional inputs, which dictate the extent of angular rotation. A shorter pulse width corresponds to movement toward one end position, while a longer pulse width directs the shaft toward the opposite end, with intermediate values enabling incremental positions in between. This modulation ensures precise regulation of the cam disc 203, allowing accurate translation of rotational motion into linear displacement of the bolt 109.

[0044] A plurality of limit switches is arranged within the body 110 for detecting the end positions of the bolt 109 corresponding to locked and unlocked states. The plurality of limit switches comprises several components operatively associated with one another for detecting position and trigger control actions. The limit switch includes an actuator for making contact with the moving element. Upon engagement, the actuator transmits force to a spring loaded arrangement within the switch, causing the internal contacts to move. The contacts are arranged to either open or close an electrical circuit, providing real-time feedback to a controller for controlling the servo motor 204 operation. This ensures precise and repeatable position based electrical control within the locking arrangement.

[0045] The controller utilizes input from the limit switches to precisely monitor the linear displacement of the bolt 109 and to determine whether the bolt 109 has reached its fully extended or fully retracted position. Upon detecting either of these end positions, the limit switches generate corresponding electrical signals that are transmitted to the controller. The controller interprets these signals in real time and immediately commands the servo motor 204 to stop rotation. This prevents the cam disc 203 from exceeding its intended angular displacement, avoiding overrun of the bolt, preventing mechanical strain on the components, minimizing wear, and ensuring stable and repeatable operation of the locking arrangement over prolonged usage cycles.

[0046] A pair of biasing springs 201 are mounted on either side of the bolt 109 for supporting, balancing, and dampening the linear motion of the bolt 109 during locking and unlocking operation. As the bolt 109 begins to extend and retract, the controller actuates the pair of biasing springs 201 to regulate the linear displacement of the bolt. When the bolt 109 initiates movement within the locking arrangement, the biasing springs 201 respond to its displacement.

[0047] As the bolt 109 extends into the locked state, the springs positioned on either side compresses, generating a restoring force that stabilizes and balances the motion. When the bolt 109 retracts into the unlocked state, the compressed springs 201 expand in a controlled manner, providing support and cushioning to ensure smooth and regulated retraction. This allows the springs 201 to dampen abrupt impacts, minimize vibration, reduce stresses on the locking arrangement and maintain consistent alignment of the bolt 109 while preventing sudden jolts and enhancing durability during repeated cycles of operation.

[0048] If the user has chosen the guest mode via the touchscreen interface 108, the controller initiates guest authentication by actuation of a camera 107 integrated with the body 110 for capturing images of guest during authentication.

[0049] The camera 107 comprises an optical lens arrangement for gathering and directing ambient light for capturing clear and detailed images of the monitored environment. The lens is capable of adjusting focus to ensure precise convergence of incoming light rays, enhancing image sharpness and clarity. A shutter arrangement regulates exposure duration, controlling the amount of light entering the camera 107 to balance image brightness and reduce motion blur during operation.

[0050] Upon successful authentication, the controller initiates the logging of access events by recording data such as timestamp, user identity, mode of access, and authentication outcome into a secure database. The system transmits real time alerts to the connected computing unit accessible the user, ensuring immediate awareness of entry activity. The alerts include event details such as captured images, access type, and verification results, enabling remote supervision, enhancing monitoring capability, and strengthens the security and accountability of the locking arrangement.

[0051] A QR (quick response) code scanner 105 is provided with the body 110 for enabling controlled guest access via one-time QR code authentication. The QR (Quick Response) code scanner 105 functions by optically capturing the graphical QR pattern and decoding it into usable authentication data. The QR code scanner 105 comprises an image acquisition unit and a decoding processor. When the QR code is presented before the scanner 105, the image acquisition unit detects the arrangement of black and white modules that constitute the QR code structure. The captured image is then converted into a digital signal and transmitted to the decoding processor.

[0052] The decoding processor then analyses the spatial arrangement of the modules, identifies alignment patterns, and extracts the encoded binary data contained in the QR symbol. This decoded information is communicated to the controller, which verifies it against a valid one time access code generated by a connected computing unit. Upon successful authentication, the controller executes corresponding access operations such as logging the event, unlocking the door, capturing guest image data, and transmitting a notification to the user, ensuring secure guest authentication through non reusable access credentials.

[0053] The controller manages and coordinates the operation of the system’s mechanical, electrical, and electronic components. The controller receives data signals from various sensors and interfaces, including access events, including timestamp, access method, user identity and authentication outcome. The controller processes the access related data against pre stored information maintained in its memory to determine authorization outcomes. Based on these outcomes, the controller actuates the servo motor 204 to drive the cam disc 203 for executing locking and unlocking operations. In addition, the controller manages real time synchronization between components, prevents overrun and mechanical wear by monitoring end positions of the bolt, and logs access events for future reference.

[0054] A MEMS (Micro-Electro-Mechanical Systems) accelerometer-based tamper detection sensor is integrated into the body 110 for detecting abnormal vibrations, shocks, and physical interference with the locking arrangement. The MEMS (Micro-Electro-Mechanical Systems) accelerometer‑based tamper detection sensor operates by detecting variations in acceleration resulting from physical interference, shocks, or vibrations applied to the locking arrangement.

[0055] The MEMS (Micro-Electro-Mechanical Systems) accelerometer‑based tamper detection sensor consists of a micro‑fabricated mechanical structure comprising a suspended proof mass connected to a set of flexible springs. When the lock body 110 experiences motion or external force, the proof mass deflects from its neutral position. This deflection alters the spacing between micro‑electrodes integrated onto the structure, resulting in a measurable change in capacitance.

[0056] The change in capacitance is converted into an electrical signal by the sensor’s interface circuit. The generated signal is then transmitted to the controller, which analyzes the pattern and magnitude of the acceleration data to determine the detected movement which corresponds to tampering activity. The controller then transmits notifications over the connected computing unit.

[0057] A user interface is inbuilt within a computing unit that is wirelessly linked with the locking system for enabling remote control and monitoring of access operations. The user interface is configured to receive input commands, display operational status, and provide supervisory control over access management. The user interacts with the interface through a touch screen, keyboard, or other input methods available on the computing unit. The computing unit mentioned herein includes, a smartphone, laptop, or tablet. The wireless communication between the controller of the locking system and the computing unit is facilitated by a communication module operatively integrated with the controller.

[0058] The communication module mentioned herein includes, but is not limited to, a Wi Fi (Wireless Fidelity) module, a GSM (Global System for Mobile Communication) module, or a Bluetooth module. The communication module used in the system is preferably the Wi Fi module. The Wi-Fi module enables wireless communication by transmitting and receiving data over radio frequencies using IEEE 802.11 protocols. The Wi-Fi module connects to a network via an access point, converting digital data into radio signals. The Wi-Fi module processes TCP/IP protocols for data exchange, interfaces with controller through UART/SPI, and ensures encrypted communication using WPA/WPA2 security standards for secure and efficient wireless connectivity.

[0059] A battery is associated with the system for powering up electrical and electronically operated components associated with the system and supplying a voltage to the components. The battery used herein is preferably a Lithium-ion battery which is a rechargeable unit that demands power supply after getting drained. The battery stores the electric current derived from an external source in the form of chemical energy, which when required by the electronic component of the system, derives the required power from the battery for proper functioning of the system.

[0060] The present invention works best in the following manner, where the system comprises of the hollow lock body mounted on the door including the cam driven bolt operatively linked to the eccentrically profiled cam disc for secure locking and unlocking operations. The Passive Infrared (PIR) sensor continuously monitors the environment and, upon detecting a person nearby, sends a signal to the controller. The controller then activates the capacitive touchscreen interface provided on the body, prompting the approaching individual to select between authorized user mode and guest access mode. In authorized user mode, the motorized protective lid opens smoothly through its motorized hinge joint to reveal the recessed biometric fingerprint scanner for secure authentication. The biometric fingerprint scanner is supported by biometric fingerprint audio guidance module including the speaker captures and verifies fingerprint data against pre stored templates. Alternatively, the capacitive touchscreen allows entry of a personal identification number (PIN), which is compared by the controller with stored authentication data. Upon successful verification, the controller grants access and transmits control signals to the high torque servo motor coupled with the cam disc.

[0061] In continuation, the servo motor converts electrical energy into mechanical torque, rotating the cam disc in precise increments to drive the bolt linearly. The bolt’s smooth motion is supported by the pair of biasing springs and guided by the barrier plate, ensuring balanced extension or retraction. In guest mode, the controller actuates the integrated camera to capture the guest’s image and enables authentication through the one time QR code scanned by the QR code scanner. The data is logged and notifications are transmitted in real time to the owner. Limit switches monitor the bolt’s movement and signal the controller when it reaches fully extended or retracted positions, allowing the motor to stop and preventing overrun or mechanical wear. The MEMS accelerometer based tamper detection sensor secures the system by sensing shocks or unauthorized disturbances. The controller manages and synchronizes all operations, authorizing access, recording events with timestamp, user identity, and outcome, and transmitting notifications through wireless modules such as Wi Fi, GSM, or Bluetooth. Power to the system is provided by the rechargeable battery unit, ensuring uninterrupted functionality.

[0062] 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) A door locking system, comprising:
i) a hollow lock body 110 developed mounted on a door, housing a cam-driven bolt 109, the cam operatively linked to a cam disc 203 configured to rotate between a locked position and an unlocked position;
ii) a high-torque servo motor 204 operatively coupled with the cam disc 203 for driving rotational motion, rotational displacement of the cam disc 203 is translated into linear motion of the bolt 109 to extend or retract the bolt 109 into a corresponding latch slot on a door frame;
iii) a pair of biasing springs 201 mounted on either side of the bolt, the springs 201 configured to alternately compress and expand to support, balance, and dampen linear motion of the bolt 109 during locking and unlocking;
iv) a Passive Infrared (PIR) sensor mounted on the body 110 for detecting proximal human presence near the door lock, the sensor triggering a touchscreen interface 108 provided with an outer portion of the body 110 to prompt a user to select between authorized user or guest access mode;
v) a motorized protective lid 101 configured to open upon selection of authorized user mode, revealing a biometric fingerprint scanner 102 embedded within a secured recessed compartment 103 of the body 110 for user authentication;
vi) a capacitive touchscreen interface 104 provided on the external body 110, the interface operable in guest mode to display a virtual numeric keypad for PIN (Personal Identification Number)-based access control; and
vii) a controller configured to manage and coordinate the operation of the system’s mechanical, electrical, and electronic components, by receiving sensor data and user inputs, processing access-related data, and controlling the servo motor 204 to enable secure and automated access control.

2) The system as claimed in claim 1, wherein a bolt barrier guide plate 202 is provided within the body 110, enclosing the bolt, the plate comprising predefined guide grooves for restricting and aligning linear motion of the bolt, wherein the bolt 109 is mechanically linked to the cam disc 203 such that eccentric rotation of the cam disc 203 drives the bolt 109 in a smooth and controlled translational motion.

3) The system as claimed in states, the switches claim 1, wherein a plurality of limit switches are arranged within the body 110 configured to detect and signal end positions of the bolt 109 corresponding to locked and unlocked providing real-time feedback to the controller for controlling the servo motor 204 operation.

4) The system as claimed in claim 1, wherein a camera 107 is integrated with the body 110 for guest photo capture upon successful authentication, logging of access events and sending real-time alerts over a computing unit accessed by a concerned individual.

5) The system as claimed in claim 1, wherein a MEMS (Micro-Electro-Mechanical Systems) accelerometer-based tamper detection sensor is integrated into the body 110 to detect physical interference, and upon detection transmit notifications over the connected computing unit.

6) The system as claimed in claim 1, wherein a QR (quick response) code scanner 105 is provided with the body 110 for guest access via one-time QR code authentication generated by the connected computing unit, and successful authentication triggers photo capture, event logging, door unlocking, and owner notification.

7) The system as claimed in claim 1, wherein the servo motor 204 is controlled via Pulse Width Modulation (PWM) to precisely rotate the cam disc 203 between 0 and 180 degree’s corresponding to locked and unlocked bolt 109 positions respectively.

8) The system as claimed in claim 1, wherein the controller utilizes input from the limit switches to stop rotation of the servo motor 204 upon detecting bolt 109 fully extended or retracted positions to prevent overrun and mechanical wear.

9) The system as claimed in claim 1, wherein the biometric fingerprint scanner 102 is further integrated with an audio guidance module, including a speaker 106 configured to provide step-by-step voice instructions to the user during the authentication process.

10) The system as claimed in claim 1, wherein the controller is pre-fed to log access events, including timestamp, access method, user identity and authentication outcome, and the data is stored locally in a remote database for future access.