Intelligent electronic combination lock

Abstract

The utility model discloses an intelligent electronic coded lock, including key module, base and lock core group. Key module is located at the front of door board, including keyboard panel, key pad, pot plate, keyboard PCB board, keyboard backboard, and the pot plate is equipped with pot piece corresponding to the key; base is located at the back of door board and includes shell, lock core mounting seat, main PCB board and shell backboard, and the main PCB board is connected with keyboard PCB board; lock core group is located at the base and includes lock bolt, push rod, walking rack, drive gear, motor and power, and the motor drives push rod and lock bolt to act through drive gear and walking rack, and the power and motor are connected with main PCB board. The utility model discloses that key module and base are installed on the both sides of door board in split type, and the security is high; the gear and rack transmission structure is stable; MCU realizes password modification and multi-user management; the pot piece provides touch feedback and prevents misoperation; it is suitable for different thickness door board, and the overall structure is compact in size, and the environmental adaptability is strong, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic locks, and in particular to an intelligent electronic combination lock that can be applied to room doors, cabinet doors or boxes. Background Technology

[0002] Electronic combination locks are increasingly used in many public places, especially in lockers in shopping malls and gyms. While traditional mechanical locks are simple and reliable, they require physical keys, are prone to loss, and are cumbersome to manage, leading to their gradual replacement by electronic locks. However, traditional electronic locks, although operable via passwords or fingerprints, suffer from several problems: they are bulky, making them unsuitable for narrow locker spaces; they are costly to produce, hindering large-scale deployment; they are prone to malfunction in humid environments, such as gyms where sweat can cause them to fail; installation is complex, requiring custom components, increasing cost and time; buttons lack clear tactile feedback, potentially leading to user errors; they are incompatible with existing parts, requiring complete replacement for repairs, increasing cost and inconvenience; and they require dedicated power interfaces and batteries, which are difficult and expensive to procure, failing to meet market demands for low-cost, easy-to-maintain locks.

[0003] In view of this, this utility model is developed by deeply conceiving and actively researching and improving the design of existing electronic combination locks, which have many shortcomings and inconveniences caused by the imperfections in the structure design. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a small-sized and low-cost intelligent electronic combination lock.

[0005] To achieve the above objectives, the solution of this utility model is: A smart electronic combination lock includes a button module, a base, and a lock cylinder assembly. The button module is located on the front of the door panel, the base is located on the back of the door panel, and the lock cylinder assembly is located on the base. The button module and the base are connected by a connecting post. The button module includes, from the outside in, a keyboard panel, a button plate, a dome switch, a keyboard PCB board, and a keyboard backplate. The keyboard panel has multiple button through holes corresponding to the buttons on the button plate. The button plate has multiple buttons that protrude from the button through holes onto the keyboard panel. The dome switch has dome switches corresponding to each button. The keyboard PCB board... The board is fixed to the keyboard backplate; the base includes a housing, a lock cylinder mounting base, a main PCB board with an MCU, and a housing backplate. The housing backplate covers the housing, and the lock cylinder mounting base and the main PCB board are located inside the housing. The main PCB board is connected to the keyboard PCB board; the lock cylinder assembly includes a bolt, a push rod, a traveling rack, a drive gear, a motor, and a power supply. The housing has a bolt through hole on one side corresponding to the bolt for the bolt to enter and exit. The push rod is connected to the bolt, the traveling rack is connected to the push rod, the drive gear meshes with the traveling rack, the motor's output shaft is connected to the drive gear, and the power supply and motor are respectively connected to the main PCB board.

[0006] Furthermore, the base has a motor compartment for power supply installation on the lock cylinder mounting seat. The motor is vertically installed in the motor compartment. A movable guide groove is provided below the motor compartment. A traveling rack is fixedly mounted on a movable plate. One end of the movable plate is connected to the traveling rack, and the other end is inserted into the movable guide groove. The drive gear is located between the traveling rack and the movable guide groove. A connecting seat for connection with the push rod is provided at the bottom of the movable plate.

[0007] Furthermore, the keyboard back panel of the key module is provided with connecting posts at the top and bottom ends, and the connecting posts are provided with locking holes for installing locking rods. The upper and lower ends of the housing of the base are provided with connecting through holes corresponding to the connecting posts. One end of the connecting post is connected to the keyboard back panel, and the other end is inserted into the housing through the connecting through hole. The locking rod is inserted into the locking hole from the end of the connecting post inserted into the housing, thus connecting the key modules together.

[0008] Furthermore, the locking rod includes two short bolts and / or two long bolts. When using two short bolts, the thickness of the door panel is 0.8-16mm; when using two long bolts, the thickness of the door panel is 16-25mm.

[0009] Furthermore, the key module also includes an LED indicator component, which includes LED light strips on the upper and lower sides of the keyboard and / or multiple LED lights on the keyboard PCB board. The key board is made of semi-transparent soft silicone material to allow light to pass through.

[0010] Furthermore, the buttons on the keypad are designed as rounded square structures with a convex arc-shaped structure on the surface, the center of which corresponds to the dome switch.

[0011] Furthermore, the connection between the key through holes and each key keyboard is sealed with silicone keyboard material, and the keyboard PCB board is coated with a waterproof coating layer.

[0012] Furthermore, the power source includes a disposable battery and / or a rechargeable battery. The disposable battery is disposed in a charging compartment located inside the housing of the base. The rechargeable battery includes a rechargeable battery disposed inside the housing and a charging interface connected to the rechargeable battery. The charging interface is located at the bottom of the keyboard panel of the key module and is sealed with a silicone plug.

[0013] Furthermore, the keyboard PCB board of the keyboard module is equipped with an NFC read / write module, and the keyboard panel is marked with an NFC logo at the corresponding position of the NFC read / write module.

[0014] Furthermore, windows for power lines to pass through are respectively provided on the keyboard back panel (15), door panel (40) and housing (21).

[0015] With the above structure, the button module and the base with the lock cylinder assembly of this utility model's intelligent electronic combination lock are respectively installed on both sides of the door panel, ensuring high security. The mechanical transmission for opening and closing the lock is achieved through a drive gear or a movable rack, resulting in a stable structure. The password is stored in the MCU, enabling functions such as password modification and multi-user management. A dome switch is provided at the bottom of the button panel, providing tactile feedback to prevent accidental operation and improve user experience. The entire intelligent electronic combination lock adopts a modular design with a separate button module and base, which, along with connecting columns, allows for quick installation. By using lock bars of different sizes, it can adapt to door panels of different thicknesses. The overall structure is compact, easy to install, highly adaptable to various environments, and has low manufacturing costs. Attached Figure Description

[0016] Figure 1 This is an exploded front view of the present invention.

[0017] Figure 2 This is an exploded back view of the present invention.

[0018] Figure 3 This is a schematic diagram of the combined state of this utility model.

[0019] Figure 4 This is a partial structural schematic diagram of the present invention.

[0020] Figure 5 This is a cross-sectional view of the present invention.

[0021] Figure 6 This is a schematic diagram of the installation state of this utility model. Detailed Implementation

[0022] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] like Figures 1 to 6 As shown, this utility model discloses an intelligent electronic combination lock, which includes a button module 10, a base 20 and a lock cylinder assembly 30. The button module 10 is disposed on the front of the door panel 40, the base 20 is disposed on the back of the door panel 40, and the lock cylinder assembly 30 is disposed on the base 20. The button module 10 and the base 20 are connected by a connecting post 50.

[0025] The key module 10 includes a keyboard panel 11, a key board 12, a dome switch 13, a keyboard PCB board 14, and a keyboard back plate 15 arranged sequentially from the outside to the inside. The keyboard panel 11 has a plurality of key through holes 111 corresponding to the keys on the key board 12. The key board 12 has a plurality of keys 121, which protrude from the key through holes 111 onto the keyboard panel 11. The dome switch 13 has dome switches 131 corresponding to each key 121. The keyboard PCB board 14 is fixed to the keyboard back plate 15. The base 20 includes a housing 21, a lock cylinder mounting base 22, a main PCB board 23 with an MCU, and a housing back plate 24. The housing back plate 24 covers the housing 21. The lock cylinder mounting base 22 and the main PCB board 23 are disposed inside the housing 21. The main PCB board 23 is connected to the keyboard PCB board 14. The lock cylinder assembly 30 includes a lock tongue 31, a push rod 32, a traveling rack 33, a drive gear 34, a motor 35, and a power supply 36. The housing 21 has a lock tongue through hole 211 on one side corresponding to the lock tongue 31 for the lock tongue 31 to enter and exit. The push rod 32 is connected to the lock tongue 31, the traveling rack 33 is connected to the push rod 32, the drive gear 34 meshes with the traveling rack 33, the output shaft of the motor 35 is connected to the drive gear 34, and the power supply 36 and the motor 35 are respectively connected to the main PCB board 23.

[0026] The keypad module 10 and the base 20 with the lock cylinder assembly 30 of this intelligent electronic combination lock are respectively installed on both sides of the door panel 40, providing high security. The mechanical transmission for opening and closing the lock is achieved through a drive gear 34 or a movable rack 33, ensuring a stable structure. The password is stored in the MCU, enabling functions such as password modification and multi-user management. A dome switch is provided at the bottom of the keypad 12, providing tactile feedback when pressed to prevent accidental operation. The working principle of this utility model is as follows: When the user presses the password on the keypad 11 on the front of the door panel 40, the force of the key is transmitted through the keypad 112 to the dome switch 131 (metal spring) on ​​the dome switch 13. After being pressed, the dome switch 131 contacts the contacts on the keyboard PCB board 14, generating an electrical signal. The keyboard PCB board 14 transmits the key signal to the main PCB board 23 inside the base 20 on the back of the door panel 40. The MCU (microcontroller) on the main PCB board 23 receives the key signal and compares the input password with the correct password stored internally. If the comparison is successful, the unlocking procedure is initiated; if the comparison fails, the door remains locked.

[0027] After successful password verification, the MCU sends a drive signal to motor 35, causing motor 35 to rotate. This rotation drives drive gear 34 via the output shaft. Drive gear 34 meshes with rack 33, converting the rotational motion into linear motion. Rack 33 pushes push rod 32, which in turn causes latch 31 to retract into housing 21. Latch 31 disengages from latch on door panel 40, the drive signal is turned off, and motor 35 stops moving. The unlocking process is maintained for a few seconds, allowing the user to open the locker door. The latch then automatically extends (into a lockable state), allowing the user to close the door and lock it. If the user does not open the door immediately after unlocking, it automatically locks again after a few seconds.

[0028] The power supply preferably uses disposable batteries or a combination of disposable and rechargeable batteries (disposable batteries are typically battery packs, such as two AAA or AA batteries) to power the main PCB board, motor, and keyboard module. The disposable batteries are housed in a charging compartment within the housing 21. The rechargeable battery includes a rechargeable battery itself housed within the housing 21 and a charging interface for connecting the rechargeable battery. The charging interface is located at the bottom of the keyboard panel 11 of the key module 10 and is sealed with a silicone plug. When the disposable batteries are depleted, the door cannot be opened. An emergency power source can be plugged in through the charging interface, and the battery can be replaced after the door is opened.

[0029] The button module 10 and the base 20 with the lock cylinder assembly 30 are respectively installed on both sides of the door panel 40, providing high security. The mechanical transmission for opening and closing the lock is achieved through a drive gear 34 or a movable rack 33, ensuring structural stability. The password is stored in the MCU, enabling functions such as password modification and multi-user management. The modular design of the button module and the separate structure of the base, combined with the connecting column 40, allows for quick installation.

[0030] In this embodiment, the lock cylinder mounting base 22 of the base 20 is provided with a motor compartment 213 for mounting the motor 35. The motor 35 is vertically mounted in the motor compartment 213. A movable guide groove 214 is provided below the motor compartment 213. The traveling rack 33 is fixedly mounted on a movable plate 37. One end of the movable plate 37 is connected to the traveling rack 33, and the other end is inserted into the movable guide groove 214. The drive gear 34 is located between the traveling rack 33 and the movable guide groove 214. The bottom end of the movable plate 37 is provided with a connecting seat 371 connected to the push rod 32. When the output shaft of the motor 35 drives the drive gear 34 to rotate, the drive gear 34 drives the traveling rack 33 to move laterally, causing the movable plate 37 to slide in the guide groove 214 to maintain a linear motion trajectory. The connecting seat 371 transmits the displacement of the movable plate 37 to the push rod 32, thereby controlling the extension and retraction of the lock tongue 31. The vertical mounting method of the motor compartment 213 allows the motor 35 and the gear transmission assembly to be stacked in the vertical direction, reducing the lateral space occupation. The movable guide groove 214 constrains the sliding path of the movable plate 37, preventing jamming caused by off-center loading during transmission. By vertically mounting the motor 35 and integrating the movable guide groove 214 and the movable plate 37 structure, higher transmission efficiency is achieved within the same volume, while reducing the number of parts. The integrated design of the movable plate 37 and the connecting seat 371 reduces assembly complexity and improves power transmission reliability, optimizes the stability of the transmission mechanism, and reduces production and maintenance costs. The cooperative design of the movable guide groove 214 and the movable plate 37 effectively prevents the locking tongue 31 from shifting, making it suitable for long-term reliable operation in confined spaces.

[0031] The keyboard backplate 15 of the key module 10 has connecting posts 50 at its upper and lower ends, respectively. Each connecting post 50 has a locking hole 51 for mounting a locking rod 60. The housing 21 of the base 20 has corresponding connecting through holes 212 at its upper and lower ends. One end of the connecting post 50 is connected to the keyboard backplate 15, and the other end is inserted into the housing 21 through the connecting through hole 212. The locking rod 60 is inserted into the locking hole 61 from the end of the connecting post 50 inserted into the housing 21, connecting the key modules 10 together. This enables rapid installation of the key modules 10 and the base 20 on door panels 40 of different thicknesses, reducing production and maintenance costs, and avoiding component replacement needs due to differences in door panel 40 thickness.

[0032] In this embodiment, the locking rod 60 can be equipped with two short bolts and / or two long bolts. When using two short bolts, the thickness of the door panel 40 is 0.8-16mm; when using two long bolts, the thickness of the door panel 40 is 16-25mm. Traditional electronic locks typically use bolts of a single length, which cannot accommodate door panels of different thicknesses, resulting in the need for custom connectors or additional washers during installation. This invention, by setting two standardized bolt specifications, covers the common door panel thickness range, avoiding installation difficulties or structural loosening problems caused by differences in the thickness of the door panel 40.

[0033] The key module 10 also includes an LED indicator component, which includes LED light strips on the upper and lower sides of the keyboard and / or multiple LED lights on the keyboard PCB board 14. The key board 12 is made of semi-transparent soft silicone material, allowing light to pass through. The size of the LED light strip can be 13.6mm × 2.6mm, and the LED light strip can be observed in both vertical and horizontal positions of the electronic lock, without the need for additional complex light guide structures, in order to control costs.

[0034] In this embodiment, the button 121 of the button plate 12 is designed as a rounded square structure with a convex arc-shaped surface, the center of which corresponds to the dome switch 131. This structure reduces the probability of accidental touches by eliminating right-angled edges, while enhancing the physical strength of the button edges. The convex arc-shaped structure allows the user's fingertip to accurately locate the trigger position of the dome switch 131. The rounded edges of the button plate 12 eliminate the risk of scratches from the sharp corners of traditional right-angled buttons, and the convex arc-shaped surface forms a spatial correspondence with the center point of the dome switch. When the user presses the button, the apex of the arc coincides with the deformation center of the dome switch, ensuring vertical transmission of the trigger stroke. The curvature design of the button surface naturally guides the pressing action to the central trigger area, avoiding accidental triggering caused by lateral sliding.

[0035] The connection between the key through-hole 111 and each key 121 is sealed with silicone, and the keyboard PCB board 14 is coated with a waterproof coating. The gap between the key through-hole 111 and the key 121 is completely sealed by silicone material, preventing liquid from entering the interior through the key pressing area; the waterproof coating layer on the surface of the keyboard PCB board 14 covers all electronic components and circuits, forming a continuous protective film. When there is moisture or liquid splash in the external environment, the silicone sealing layer first blocks most of the liquid penetration, and the residual moisture is blocked by the waterproof coating layer when it comes into contact with the PCB board 14, avoiding short circuits or oxidation. Through the dual protection structure, a continuous waterproof barrier is formed at the key contact area and on the surface of the circuit board. This design effectively solves the problem of circuit failure caused by liquid seepage in humid environments, improves the operational reliability of the device in high-humidity environments such as gyms and bathrooms, and extends the service life of electronic components.

[0036] The keyboard module 10 has an NFC read / write module on its keyboard PCB board 14, and an NFC identifier is marked on the keyboard panel 11 corresponding to the NFC read / write module. With the NFC read / write module, this invention offers two unlocking methods: password unlocking and NFC unlocking. The NFC read / write module is an electronic component supporting near-field communication, specifically implemented using a PCB surface mount assembly integrating a radio frequency chip and antenna, used for data interaction with external NFC devices. The NFC identifier is a graphic symbol printed or engraved on the keyboard panel surface, used to indicate the user's operating position. When the user brings an NFC-enabled device close to the NFC identifier area on the keyboard panel, the NFC read / write module acquires the authentication information stored in the device through electromagnetic induction and transmits this information to the main PCB board for verification. After successful verification, the main PCB board sends an unlock command to the lock cylinder assembly 30, driving the motor 35 to control the bolt 31 to retract. The NFC read / write module is integrated with the keyboard PCB board 14, requiring no additional space, and the identifier area is separated from the key layout, avoiding accidental touches. It adopts NFC contactless communication, reducing the risk of wear or liquid penetration caused by physical contact, while being compatible with a variety of NFC devices, such as mobile phones or smart cards, simplifying the user operation process.

[0037] In summary, the intelligent electronic combination lock of this utility model has the following advantages: Miniaturized and highly adaptable: The key smart electronic combination lock features a miniaturized overall structure, making it flexible enough to fit into densely packed installation spaces such as gyms and shopping mall lockers.

[0038] Significant cost advantages: The streamlined and stable lock cylinder assembly structure reduces material and production assembly costs.

[0039] Good environmental adaptability: The waterproof sealing components enable the keyboard module to achieve an IP54 waterproof rating, which can cope with the humid environment of gyms and the dusty environment of shopping malls, extend the service life of electronic locks, and reduce failure and maintenance costs.

[0040] This utility model integrates core functions such as keyboard input, RFID identification, LED indication, and sound prompts, making it flexible, convenient, and providing a good user experience.

[0041] Reliable power supply: The Type-C backup power interface, combined with AA or AAA batteries, ensures that the electronic lock can still work when the main power supply fails, avoiding the problem of the locker being unable to open and improving the reliability and convenience of use.

[0042] Clear labeling: The semi-transparent digital labels use standardized symbols and are highly recognizable under LED lighting, allowing users to quickly identify buttons and reduce operational errors.

[0043] Highly adaptable: Its low cost, small size, and easy maintenance make it suitable for large-scale procurement and use in gyms, shopping malls, and other venues, with great market potential.

[0044] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A smart electronic combination lock, characterized in that, include: The button module (10), base (20) and lock cylinder assembly (30) are provided. The button module (10) is located on the front of the door panel (40), the base (20) is located on the back of the door panel (40), and the lock cylinder assembly (30) is located on the base (20). The button module (10) and the base (20) are connected by a connecting post (50). The key module (10) includes a keyboard panel (11), a key board (12), a dome switch (13), a keyboard PCB board (14), and a keyboard back plate (15) arranged sequentially from the outside to the inside. The keyboard panel (11) has multiple key through holes (111) corresponding to the keys on the key board (12). The key board (12) has multiple keys (121). The multiple keys (121) protrude from the key through holes (111) onto the keyboard panel (11). The dome switch (13) has dome switches (131) corresponding to each key (121). The keyboard PCB board (14) is fixed on the keyboard back plate (15). The base (20) includes a housing (21), a lock cylinder mounting base (22), a main PCB board (23) with an MCU, and a housing back plate (24). The housing back plate (24) covers the housing (21). The lock cylinder mounting base (22) and the main PCB board (23) are located inside the housing (21). The main PCB board (23) is connected to the keyboard PCB board (14). The lock cylinder assembly (30) includes a lock tongue (31), a push rod (32), a traveling rack (33), a drive gear (34), a motor (35), and a power supply (36). The housing (21) has a lock tongue through hole (211) on one side corresponding to the lock tongue (31) for the lock tongue (31) to enter and exit. The push rod (32) is connected to the lock tongue (31), the traveling rack (33) is connected to the push rod (32), the drive gear (34) meshes with the traveling rack (33), the output shaft of the motor (35) is connected to the drive gear (34), and the power supply (36) and the motor (35) are respectively connected to the main PCB board (23).

2. The intelligent electronic combination lock as described in claim 1, characterized in that: The base (20) has a lock cylinder mounting seat (22) with a motor compartment (213) for mounting the motor (35). The motor (35) is vertically mounted in the motor compartment (213). The motor compartment (213) has a movable guide groove (214) below it. The traveling rack (33) is fixedly mounted on a movable plate (37). One end of the movable plate (37) is connected to the traveling rack (33), and the other end is inserted into the movable guide groove (214). The drive gear (34) is located between the traveling rack (33) and the movable guide groove (214). The bottom end of the movable plate (37) has a connecting seat (371) connected to the push rod (32).

3. The intelligent electronic combination lock as described in claim 1, characterized in that: The keyboard backplate (15) of the key module (10) is provided with connecting posts (50) at the top and bottom ends respectively. The connecting posts (50) are provided with locking holes (51) for installing locking rods (60). The housing (21) of the base (20) is provided with connecting through holes (212) corresponding to the connecting posts (50) at the top and bottom ends. One end of the connecting post (50) is connected to the keyboard backplate (15), and the other end is inserted into the housing (21) through the connecting through hole (212). The locking rod (60) is inserted into the locking hole (61) from the end of the connecting post (50) inserted into the housing (21), connecting the key module (10) and the base (20) together.

4. The intelligent electronic combination lock as described in claim 3, characterized in that: The locking rod (60) includes two short bolts and / or two long bolts. When using two short bolts, the thickness of the door panel (40) is 0.8-16mm; when using two long bolts, the thickness of the door panel (40) is 16-25mm.

5. The intelligent electronic combination lock as described in claim 1, characterized in that: The key module (10) also includes an LED indicator component, which includes LED light strips on the upper and lower sides of the keyboard and / or multiple LED lights on the keyboard PCB board (14). The key board (12) is made of semi-transparent soft silicone material, allowing light to pass through.

6. The intelligent electronic combination lock as described in claim 1, characterized in that: The buttons (121) of the button panel (12) are designed as rounded square structures, and the surface forms an outwardly convex arc structure, with the center of the arc corresponding to the dome switch (131).

7. The intelligent electronic combination lock as described in claim 1, characterized in that: The connection between the key through hole (111) and each key (121) of the keyboard is sealed with silicone keyboard material, and the keyboard PCB board (14) is coated with a waterproof coating layer.

8. The intelligent electronic combination lock as described in claim 1, characterized in that: The power source (36) includes a disposable battery and / or a rechargeable battery. The disposable battery is disposed in a charging compartment located inside the housing (21) of the base (20). The rechargeable battery includes a rechargeable battery disposed inside the housing (21) and a charging interface connected to the rechargeable battery. The charging interface is located at the bottom of the keyboard panel (11) of the key module (10) and is sealed with a silicone plug.

9. The intelligent electronic combination lock as described in claim 1, characterized in that: The keyboard PCB board (14) of the key module (10) is equipped with an NFC read / write module, and the keyboard panel (11) is marked with an NFC logo at the position corresponding to the NFC read / write module.

10. The intelligent electronic combination lock as described in claim 1, characterized in that: The keyboard backplate (15), door panel (40) and housing (21) are respectively provided with windows for power supply lines to pass through.

Images