Intelligent lock cylinder based on passive radio frequency identification tag
The integration of a passive RFID tag with a mechanical lock core through dual authentication mechanisms addresses security vulnerabilities in existing smart lock cylinders, enhancing safety and reliability by ensuring both electronic and mechanical verification.
Patent Information
- Application Number
- CN202420927895.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Current smart lock cylinders based on RFID technology lack integration with mechanical lock cores, leading to security vulnerabilities such as electromagnetic interference and misidentification, compromising safety and convenience.
A smart lock core that integrates a passive RFID tag with a mechanical lock core, utilizing a reading and writing device inside the keyhole, conductive rings and posts for electrical connection, and an electromagnet for dual authentication, ensuring both electronic and mechanical verification before unlocking.
Enhances security and reliability by requiring simultaneous successful electronic and mechanical authentication, preventing unauthorized access and improving safety and convenience.
Smart Images
Figure CN222233046U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of intelligent lock cores, in particular to an intelligent lock core based on a passive radio frequency identification tag. Background Art
[0002] With the advancement of science and technology and the development of society, people's demand for security is increasing day by day. As an important part of modern security, smart lock cylinders are gradually replacing traditional mechanical lock cylinders and becoming the mainstream of the market. Although the traditional mechanical lock cylinder has a simple structure, it has low security and is easily cracked by technology, which cannot meet the needs of modern high security.
[0003] In recent years, radio frequency identification (RFID) technology has been widely used in many fields due to its non-contact, fast reading, and high security features. As a special identity tag, RFID tags can be easily attached to various items to achieve automatic identification and management. Applying RFID technology to the lock core field can significantly improve the security and convenience of the lock core.
[0004] However, most of the smart lock cylinders based on RFID technology on the market currently use a single RFID reading device. Although electronic identification and authentication are achieved, they are not closely integrated with the mechanical lock cylinder, which may threaten its security when facing specific attack methods, such as electromagnetic interference. In addition, a single electronic authentication method also has risks such as misidentification and misoperation, which may cause inconvenience to users. Utility Model Content
[0005] The main purpose of the utility model is to provide a smart lock core based on a passive radio frequency identification tag. Most of the smart lock cores based on RFID technology on the market currently use a single RFID reading device. Although electronic identification and authentication are achieved, they are not closely integrated with the mechanical lock core, resulting in problems when facing specific attack methods, such as electromagnetic interference.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a smart lock core based on a passive radio frequency identification tag, the lock core is arranged inside the lock core shell, a reading and writing device is arranged on the inner wall of the lock core key hole, an RFID tag is arranged on one side of the smart key, and a plurality of data transmission contacts are arranged on the other side, the RFID tag is inductively coupled to the reading and writing device, and the plurality of data transmission contacts are pressed against the electrical contacts inside the lock core;
[0007] A plurality of conductive rings are provided on the outer wall of the lock core, and the reading and writing device and the electrical contacts are electrically connected to the conductive rings. A plurality of conductive posts are provided under the lock core shell, and the conductive posts pass through the lock core shell and abut against the conductive rings. The conductive posts are electrically connected to the control circuit. An electromagnet is provided on one side of the conductive post, and the electromagnet is electrically connected to the control circuit. A locking pin is provided on the electromagnet, and the locking pin passes through the lock core shell and is inserted into the pin hole of the lock core.
[0008] In the preferred embodiment, the reading and writing device is arranged on one side of the keyhole inside the lock core, and a plurality of through holes are provided on the lock core. A first power connection post is provided at one end of the through hole, and the first power connection post rests on the conductive ring on the left side. A power connection wire is provided inside the through hole, and one end of the power connection wire is connected to the first power connection post, and the other end is electrically connected to the reading and writing device.
[0009] In a preferred embodiment, a plurality of electrical contacts are arranged on the other side of the keyhole of the lock core, the electrical contacts are arranged inside the blind hole, and a second spring is arranged between the bottom of the blind hole and the end of the electrical contact.
[0010] In a preferred embodiment, the end of the electrical contact is a conical structure, the end of the blind hole is provided with a matching conical necking structure, and the end of the electrical contact extends out of the necking for a certain distance.
[0011] In a preferred embodiment, a second power connection post is provided at the bottom of the blind hole, one end of the second power connection post is connected to the power connection contact through an electric wire, and the end of the second power connection post abuts against the conductive ring at the right position.
[0012] In the preferred embodiment, an annular groove is provided at one end of the lock core, a matching annular through groove is provided on the lock core housing, a limiting ring is provided inside the annular groove and the annular through groove, and an opening is provided below the limiting ring.
[0013] In a preferred embodiment, a lock tongue is provided in the middle of the lock core housing, and the lock tongue is clamped with the end of the lock core.
[0014] The utility model provides a smart lock core based on a passive radio frequency identification tag, which closely combines RFID technology with a mechanical lock core to achieve dual authentication, namely, unlocking mode and electronic authentication, which has important practical significance and application value. The door lock can be opened only when and only when both authentications are successful, thereby greatly improving the safety and reliability of the lock core. At the same time, when the RFID authentication fails, the lock core cannot be opened. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0016] Figure 1 This is the overall appearance structure diagram of the utility model;
[0017] Figure 2 This is a disassembled anatomical structural diagram of the utility model;
[0018] Figure 3This is a disassembled anatomical structural diagram of the lock core of the utility model;
[0019] Figure 4 It is a main structural diagram of the lock core of the utility model.
[0020] In the figure: lock cylinder housing 1; lock tongue 2; protective shell 3; smart key 4; data transmission electric contact 401; RFID tag 5; limit ring 6; lock cylinder 7; conductive ring 8; electromagnet 9; first spring 10; locking pin 11; control circuit 12; power connection mounting seat 13; second spring 14; conductive column 15; read-write device 16; first power connection column 17; power connection wire 18; power connection contact 19; blind hole 20; second spring 21; second power connection column 22. DETAILED DESCRIPTION
[0021] like Figures 1 to 4 As shown, a smart lock core based on a passive radio frequency identification tag, the lock core 7 is arranged inside the lock core housing 1, the inner wall of the key hole of the lock core 7 is provided with a reading and writing device 16, an RFID tag 5 is provided on one side of the smart key 4, and a plurality of data transmission contacts 401 are provided on the other side, the RFID tag 5 is inductively coupled to the reading and writing device 16, and the plurality of data transmission contacts 401 are abutted against the power contact 19 inside the lock core 7;
[0022] The outer wall of the lock core 7 is provided with multiple conductive rings 8, and the reading and writing device 16 and the electrical contact 19 are electrically connected to the conductive rings 8. A plurality of conductive columns 15 are provided under the lock core housing 1. The conductive columns 15 pass through the lock core housing 1 and abut against the conductive rings 8. The conductive columns 15 are electrically connected to the control circuit 12. An electromagnet 9 is provided on one side of the conductive column 15. The electromagnet 9 is electrically connected to the control circuit 12. A locking pin 11 is provided on the electromagnet 9. The locking pin 11 passes through the lock core housing 1 and is inserted into the pin hole of the lock core 7.
[0023] The method of use is as follows: insert the smart key 4 with the RFID tag 5 into the lock cylinder 7, and the reading and writing device 16 reads the data of the RFID tag 5. At the same time, the data transmission contact 401 of the smart key 4 is connected to the power contact 19 to transmit the data to the control circuit 12. When the reading and writing device 16 confirms that the data is correct, the control circuit 12 supplies power to the electromagnet 9, and the electromagnet 9 generates magnetic force to retract the locking pin 11, thereby allowing the smart key 4 to rotate the lock cylinder 7.
[0024] This technical solution combines RFID identification technology with a mechanical lock core to implement a dual authentication mechanism, improving the security and reliability of the lock core.
[0025] The lock core 7 is installed inside the lock core housing 1 , and a reading and writing device 16 is embedded on the inner wall of the key hole thereof, which is used to identify and read the information of the RFID tag 5 on the smart key 4 .
[0026] The two sides of the smart key 4 are respectively provided with an RFID tag 5 and a plurality of data transmission contacts 401. When the key is inserted into the lock cylinder, the RFID tag performs contactless induction communication with the reader / writer, and the data transmission contact contacts 19 inside the lock cylinder to realize data transmission.
[0027] The outer wall of the lock core is provided with a plurality of conductive rings 8, which transmit the electrical signals of the reading and writing device 16 and the electrical contacts 19 to the outside. A plurality of conductive posts 15 are fixed to the bottom of the lock core housing 1, which contact the conductive rings by penetrating the lock core housing to form an electrical connection.
[0028] The conductive column 15 is further connected to the control circuit 12, so that the signal inside the lock core can be transmitted to the control circuit for processing. An electromagnet 9 is also installed on one side of the conductive column, which is also electrically connected to the control circuit and has a retractable locking pin 11 thereon. The pin passes through the lock core housing and is inserted into the pin hole of the lock core to lock or release the lock core.
[0029] When in use, the user holds the smart key 4 with the RFID tag 5 and inserts it into the lock cylinder 7. At this time, the RFID tag establishes induction with the reader / writer 16, and the reader / writer starts to read the identity authentication data in the RFID tag.
[0030] At the same time, the data transmission contact 401 on the smart key is in close contact with the power contact 19 in the lock core, transmitting additional security verification data or operation instructions to the control circuit 12.
[0031] After receiving and verifying the above two parts of data, the control circuit sends a power supply instruction to the electromagnet 9. The electromagnet generates magnetic force when it is energized, causing the locking pin 11 connected thereto to contract, thereby releasing the lock cylinder 7.
[0032] After unlocking, the smart key 4 can freely rotate the lock cylinder to complete the unlocking operation. When the key is pulled out or needs to be locked, the electromagnet is powered off, the locking pin is extended by the spring or other reset mechanism, and is reinserted into the lock cylinder pin hole to lock the lock cylinder.
[0033] In the preferred embodiment, the read / write device 16 is arranged on one side of the key hole inside the lock core 7. The lock core 7 is provided with a plurality of through holes. A first power connection post 17 is arranged at one end of the through hole. The first power connection post 17 abuts against the conductive ring 8 at the left position. A power connection wire 18 is arranged inside the through hole. One end of the power connection wire 18 is connected to the first power connection post 17, and the other end is electrically connected to the read / write device 16. The power connection wire 18 transmits the data of the read / write device 16 to the control circuit 12.
[0034] The read / write device 16 is located on one side of the keyhole inside the lock core 7 so as to effectively sense the RFID tag 5 on the inserted smart key 4. In order to transmit the RFID data acquired by the read / write device to the control circuit 12, a plurality of through holes are designed on the lock core 7, which play the role of internal wiring.
[0035] A first connecting post 17 is disposed at one end of the through hole, and the connecting post directly abuts against the conductive ring 8 at the left position. The conductive ring, as a part of the current conduction path, establishes an electrical connection between the connecting post and the external conductive post 15 and the control circuit 12.
[0036] A power connection wire 18 is arranged inside the through hole, one end of which is tightly connected to the first power connection post 17 to form a stable electrical contact. The other end of the power connection wire is electrically connected to the read-write device 16 to ensure that the data signal generated by the read-write device during operation can be smoothly transmitted through the power connection wire.
[0037] After the reading and writing device 16 reads the data of the RFID tag 5, the data is transmitted to the first power pole 17 through the power connection wire 18, and then transmitted to the control circuit 12 through the left conductive ring 8 and the conductive pole 15. The control circuit receives and processes the data, verifies the identity information, and determines whether to allow unlocking.
[0038] The reading and writing device 16 accurately transmits the read RFID tag data to the control circuit 12 through the electrical conduction path formed by the internal power connection wire 18 and the first power connection post 17, the conductive ring 8, and the conductive post 15, providing necessary information support for the decision-making and action control of the smart lock.
[0039] In a preferred embodiment, a plurality of electrical contacts 19 are arranged on the other side of the keyhole of the lock core 7 , the electrical contacts 19 are arranged inside the blind hole 20 , and a second spring 21 is arranged between the bottom of the blind hole 20 and the end of the electrical contacts 19 .
[0040] On the other side of the keyhole of the lock core 7, a plurality of electrical contacts 19 are designed, which are used to contact the data transmission contacts 401 on the smart key 4 to realize data exchange between the key and the lock core. The electrical contacts 19 are not directly exposed to the outside, but are arranged inside a specific blind hole 20 to provide a stable and protective contact environment.
[0041] A second spring 21 is provided between the bottom of the blind hole 20 and the end of the electrical contact 19. When the smart key is inserted, the data transmission contact 401 will apply a certain pressure to the electrical contact 19. The spring can provide a reverse elastic force to ensure that the contacts always maintain an appropriate contact pressure, which is beneficial to improving the stability and reliability of the electrical contact and reducing current interruption or errors caused by poor contact.
[0042] There may be slight differences in the angle and force of key insertion. The presence of the spring helps absorb these tiny fluctuations during the insertion process, ensuring that the data transmission contact 401 and the power contact 19 can contact each other smoothly and smoothly, avoiding damage to the contacts or affecting the quality of data transmission due to hard collisions.
[0043] In the preferred embodiment, the end of the electrical contact 19 is a conical structure, and the end of the blind hole 20 is provided with a matching conical conical constriction structure, and the end of the electrical contact 19 extends out of the constriction for a certain distance, which serves as a limit to prevent the electrical contact 19 from being pushed out of the blind hole 20.
[0044] In the preferred embodiment, a second connecting post 22 is provided at the bottom of the blind hole 20, one end of the second connecting post 22 is connected to the power contact 19 through a wire, and the end of the second connecting post 22 abuts against the conductive ring 8 at the right position. The second connecting post 22 and the conductive ring 8 form electrical conduction.
[0045] In the preferred embodiment, a ring groove is provided at one end of the lock core 7, a matching ring groove is provided on the lock core housing 1, a stop ring 6 is provided inside the ring groove and the ring groove, and an opening is provided below the stop ring 6. The lock core 7 is limited to the inside of the lock core housing 1 by the stop ring 6.
[0046] In the preferred embodiment, a lock tongue 2 is provided in the middle of the lock core housing 1, and the lock tongue 2 is clamped with the end of the lock core 7, so as to facilitate the assembly of the lock core.
[0047] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.
Claims
1. A smart lock cylinder based on a passive radio frequency identification tag, characterized by: The lock core (7) is arranged inside the lock core housing (1); a reading and writing device (16) is provided on the inner wall of the key hole of the lock core (7); an RFID tag (5) is provided on one side of the smart key (4); and a plurality of data transmission contacts (401) are provided on the other side; the RFID tag (5) senses the reading and writing device (16); and the plurality of data transmission contacts (401) abut against power contacts (19) inside the lock core (7); The outer wall of the lock core (7) is provided with a plurality of conductive rings (8), the reading and writing device (16) and the electrical contact (19) are electrically connected to the conductive rings (8), a plurality of conductive posts (15) are provided below the lock core housing (1), the conductive posts (15) pass through the lock core housing (1) and abut against the conductive rings (8), the conductive posts (15) are electrically connected to the control circuit (12), an electromagnet (9) is provided on one side of the conductive post (15), the electromagnet (9) is electrically connected to the control circuit (12), a locking pin (11) is provided on the electromagnet (9), and the locking pin (11) passes through the lock core housing (1) and is inserted into a pin hole of the lock core (7).
2. According to claim 1, the intelligent lock cylinder based on passive radio frequency identification tag is characterized in that: The read / write device (16) is arranged on one side of the keyhole inside the lock core (7). The lock core (7) is provided with a plurality of through holes. A first power connection post (17) is provided at one end of the through hole. The first power connection post (17) abuts against the conductive ring (8) at the left side. A power connection wire (18) is provided inside the through hole. One end of the power connection wire (18) is connected to the first power connection post (17), and the other end is electrically connected to the read / write device (16).
3. According to claim 1, the intelligent lock cylinder based on passive radio frequency identification tag is characterized in that: A plurality of electrical contacts (19) are arranged on the other side of the keyhole of the lock core (7), the electrical contacts (19) are arranged inside the blind hole (20), and a second spring (21) is arranged between the bottom of the blind hole (20) and the end of the electrical contacts (19).
4. According to claim 3, the intelligent lock cylinder based on passive radio frequency identification tag is characterized in that: The end of the electrical contact (19) is a conical structure, and the end of the blind hole (20) is provided with a matching conical conical constriction structure, and the end of the electrical contact (19) extends out of the constriction for a certain distance.
5. According to claim 3, the intelligent lock cylinder based on passive radio frequency identification tag is characterized in that: A second power connection post (22) is provided at the bottom of the blind hole (20); one end of the second power connection post (22) is connected to the power connection contact (19) via an electric wire; and the end of the second power connection post (22) abuts against the conductive ring (8) at the right side.
6. The intelligent lock cylinder based on passive radio frequency identification tag according to claim 1 is characterized in that: A ring groove is provided at one end of the lock core (7), a matching ring groove is provided on the lock core housing (1), a limiting ring (6) is provided inside the ring groove and the ring groove, and an opening is provided below the limiting ring (6).
7. The intelligent lock cylinder based on passive radio frequency identification tag according to claim 1 is characterized in that: A lock tongue (2) is provided in the middle of the lock core housing (1), and the lock tongue (2) is clamped with the end of the lock core (7).