Passive intelligent lock based on electromagnetic induction

Abstract

The utility model provides a passive intelligent lock based on electromagnetic induction, which comprises a passive intelligent lock cylinder and a passive key, the lock cylinder is arranged inside a lock cylinder shell, a lock plunger mechanism, a power connection component and a control system are arranged in a cavity below the lock cylinder shell, a locking column in the lock plunger mechanism penetrates through the lock cylinder shell and is inserted into a locking hole of the lock cylinder, and the passive key is arranged in the lock cylinder shell. Permanent magnets with opposite magnetic poles are arranged in the lock cylinder shell, a magnetic field perpendicular to the plane of the tooth portion of the passive key is formed, the passive key is inserted into a key hole of the lock cylinder, an internal conductor coil generates induction current, a temporary power source is provided for the lock plunger mechanism through the power connection component, the locking column is driven to retract, and the passive key rotates the lock cylinder to open the lock. The problems that a key for supplying energy by a passive lock cylinder needs a built-in power supply, the electric quantity is possibly exhausted, and the unlocking efficiency and the use of a user are influenced are solved.

Description

Technical Field

[0001] The utility model relates to the field of intelligent lock cores, and particularly to a passive intelligent lock based on electromagnetic induction. Background Art

[0002] With the progress of technology and the development of society, people's demand for security is increasing day by day. As an important part of the modern security field, intelligent lock cores are gradually replacing traditional mechanical lock cores, becoming the mainstream of the market, and are widely used in various devices such as homes, commercial buildings, and public facilities for security protection. Compared with traditional locks, intelligent lock cores not only provide higher security but also greatly improve the convenience of use.

[0003] A passive lock core usually refers to a mechanical lock core that can work without an external power supply. This means that the lock core itself does not contain a built-in power supply and relies on its physical structure to achieve security functions. This type of lock core usually needs to rely on an intelligent key or other forms of energy transmission to activate the internal mechanism. After a period of use, such keys may need to be charged or have their batteries replaced. If the power storage device runs out of power or the battery runs out, the passive lock core cannot be unlocked, and only the backup method can be used to unlock it, which greatly affects the unlocking efficiency and user experience of the user.

[0004] According to Faraday's law of electromagnetic induction, when the magnetic flux passing through a closed loop changes, an electromotive force will be generated in this loop, and then an electric current will be generated. It can be combined with the passive intelligent lock core technology to design a passive intelligent lock based on electromagnetic induction. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a passive intelligent lock based on electromagnetic induction, which solves the problem that the key used to supply energy for the passive lock core needs a built-in power supply, and the power may run out, affecting the unlocking efficiency and user experience.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is: a passive intelligent lock based on electromagnetic induction, including a passive intelligent lock core and a passive key. The lock core is arranged inside the lock core housing. Inside the cavity below the lock core housing, there are a locking bolt mechanism, a power connection component, and a control system. The locking post in the locking bolt mechanism passes through the lock core housing and inserts into the locking hole of the lock core. Inside the lock core housing, there are permanent magnets with opposite magnetic poles, forming a magnetic field perpendicular to the plane of the tooth part of the passive key. When the passive key is inserted into the keyhole of the lock core, an induced current is generated in the internal conductor coil, and a temporary power supply is provided to the locking bolt mechanism through the power connection component to drive the locking post to retract, and the passive key rotates the lock core to open the lock.

[0007] In a preferred embodiment, the permanent magnet is composed of two unlike magnetic poles with an arc-shaped cross-section, symmetrically arranged inside the lock core housing around the outer circumference of the lock core, forming a magnetic field perpendicular to the plane of the tooth portion when the passive key is inserted into the keyhole of the lock core. The length of the permanent magnet is adapted to the length of the tooth portion of the passive key.

[0008] In a preferred embodiment, multiple sets of conductor coils are provided inside the tooth portion of the passive key, and the conductor coils are electrically connected to the electronic control components inside the handle portion of the passive key;

[0009] On the outer surface of the tooth portion of the passive key, multiple signal contacts are further provided, and the signal contacts are electrically connected to the electronic control components.

[0010] In a preferred embodiment, the structure of the power connection component is as follows: at least two first power connection heads are provided on the power connection base, the bottom ends of the first power connection heads are connected to the bottom of the blind hole of the power connection base through first springs, and the first power connection heads slide in the blind hole.

[0011] In a preferred embodiment, at least two conductive rings are provided at the outer end of the lock core near the keyhole, and the first power connection heads pass through the lock core housing and abut against the conductive rings.

[0012] In a preferred embodiment, at least two blind holes are provided on one side of the keyhole inside the lock core, perpendicular to the plane of the tooth portion of the passive key. Second power connection heads are provided inside the blind holes, and the bottom ends of the second power connection heads are connected to the bottoms of the blind holes through second springs;

[0013] A wire is further provided at the bottom end of the first power connection head. One end of the wire is connected to the end of the first power connection head, and the other end passes through the power connection base and is electrically connected to the lock bolt mechanism and the control system;

[0014] A conductive column is further provided at the bottom end of the second power connection head. One end of the conductive column is connected to the end of the second power connection head, and the other end is connected to the conductive ring.

[0015] In a preferred embodiment, when the passive key is inserted into the keyhole of the lock core, the end of the second power connection head abuts against the signal contact to supply power to the inside of the lock core.

[0016] In a preferred embodiment, the structure of the lock bolt mechanism is as follows: the lower end of the locking post is connected to one side of the rack through an L-shaped connecting plate. A driving motor is provided on the other side of the rack, and its output shaft is connected to a gear. The gear meshes with the tooth portion on the front side of the rack to control the driving motor to drive the locking post to slide in the locking hole.

[0017] In a preferred embodiment, a T-shaped slider is provided on the rear side of the rack, and a matching T-shaped sliding groove is provided inside the back plate. The rack is slidably connected to the inner wall of the cavity below the lock core housing through the back plate;

[0018] A U-shaped lock post seat is further provided at the lower end of the locking post. The lower end of the locking post is connected to the bottom of the U-shaped lock post seat through a third spring. The inner surface of the U-shaped lock post seat is adapted to the outer surface of the locking post, and the locking post slides in the U-shaped lock post seat.

[0019] In a preferred embodiment, the power connection component is arranged on one side above the control system, and the drive motor is arranged on the other side above the control system;

[0020] A stepped ring is provided at the rear end of the lock core housing, and a mating annular groove is provided at the rear end of the lock core. The stepped ring is arranged in the annular groove to limit the axial movement of the lock core, and the rear end of the lock core is connected to the lock tongue.

[0021] The present utility model provides a passive intelligent lock based on electromagnetic induction. When the passive key is inserted into the lock core, it cuts the magnetic induction lines to generate current, and supplies power to the inside of the lock core through the power connection contacts. At the same time, information transmission and authentication are carried out. After the authentication is passed, power is supplied to the lock bolt mechanism, and the lock stop column is retracted by the gear-rack mechanism to release the lock on the rotation of the lock core.

[0022] The magnetic field and power transmission mechanism inside the lock core are reasonably arranged, and the principle of electromagnetic induction is combined with the technology of the passive intelligent lock core, so that neither the lock core nor the key needs to be provided with an additional power source. The action of the user inserting the key is reasonably utilized to generate current, so as to supply power to each electronic component for intelligent information authentication, so that the key of the intelligent lock core does not need to replace the power source, and the unlocking efficiency and use experience of the user are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0024] Figure 1 is the overall side view structure diagram of the present utility model;

[0025] Figure 2 is the overall sectional view structure diagram when the passive key of the present utility model is inserted;

[0026] Figure 3 is the sectional view structure diagram of the power connection plane of the present utility model;

[0027] Figure 4 is the installation structure diagram of the permanent magnet inside the lock core housing of the present utility model;

[0028] Figure 5 is the sectional view structure diagram of the passive key of the present utility model;

[0029] Figure 6 is the axonometric view structure diagram of the lock bolt mechanism of the present utility model;

[0030] Figure 7 is the side view structure diagram of the lock bolt mechanism in the exploded mode of the present utility model.

[0031] In the figure: lock core 1; locking hole 101; annular groove 102; lock core housing 2; stepped ring 201; locking bolt mechanism 3; locking post 301; rack 302; drive motor 303; gear 304; back plate 305; L-shaped connecting plate 306; U-shaped lock post seat 307; third spring 308; power connection component 4; power connection seat 401; first power connection head 402; first spring 403; control system 5; passive key 6; conductor coil 601; electronic control component 602; signal contact 603; permanent magnet 7; conductive ring 8; second power connection head 9; second spring 901; conductive post 902; lock tongue 10. Detailed implementation mode

[0032] Embodiment 1

[0033] As Figures 1 to 7 As shown, a passive intelligent lock based on electromagnetic induction includes a passive intelligent lock core 1 and a passive key 6. The lock core 1 is arranged inside the lock core housing 2. Inside the lower cavity of the lock core housing 2, there are a locking bolt mechanism 3, a power connection component 4 and a control system 5. The locking post 301 in the locking bolt mechanism 3 passes through the lock core housing 2 and inserts into the locking hole 101 of the lock core 1. Inside the lock core housing 2, there are permanent magnets 7 with opposite magnetic poles, forming a magnetic field perpendicular to the tooth plane of the passive key 6. When the passive key 6 is inserted into the keyhole of the lock core 1, an induced current is generated in the internal conductor coil 601, and a temporary power supply is provided to the locking bolt mechanism 3 through the power connection component 4 to drive the retraction of the locking post 301. The passive key 6 rotates the lock core 1 to open the lock.

[0034] This application uses the principle of electromagnetic induction as the power supply basis. Both the lock core and the key are passive. When the passive key 6 is inserted into the keyhole of the lock core 1, it cuts the magnetic induction line to generate current, and the current is collected and transmitted through the internal circuit of the passive key 6 to provide a temporary power supply inside the lock core 1, activate the internal control system 5 of the lock core 1, and authenticate the information of the passive key 1.

[0035] In a preferred solution, the permanent magnets 7 are two unlike magnetic poles, with an arc-shaped cross-section, symmetrically arranged inside the outer ring of the lock core 1 in the lock core housing 2, forming a magnetic field perpendicular to the tooth plane when the passive key 6 is inserted into the keyhole of the lock core 1. The length of the permanent magnet 7 is adapted to the length of the tooth part of the passive key 6.

[0036] In a preferred solution, multiple groups of conductor coils 601 are arranged inside the tooth part of the passive key 6, and the conductor coils 601 are electrically connected to the electronic control component 602 inside the handle of the passive key 6;

[0037] On the outer surface of the tooth part of the passive key 6, there are also multiple signal contacts 603, and the signal contacts 603 are electrically connected to the electronic control component 602.

[0038] Specifically, the two opposite unlike permanent magnets 7 are respectively an N pole and an S pole, and the internal space sandwiched by them forms a magnetic field that is constantly perpendicular to the keyhole plane of the passive key 6. Inside the passive key 6, there are multiple groups of closed conductor coils 601. The effective cutting part perpendicular to the magnetic field cuts the magnetic induction lines as the user inserts the passive key 6 into the keyhole of the lock core 1, generating an electric current, which is transmitted back to the electronic control component 602 inside the passive key 6 through a closed circuit, activating the identity recognition component of the passive key and storing electrical energy. Part of the electrical energy is transmitted to the outside through multiple signal contacts 603 on the surface of the tooth part of the passive key 6.

[0039] In a preferred embodiment, the structure of the power connection component 4 is as follows: at least two first power connection heads 402 are provided on the power connection base 401. The bottom end of the first power connection head 402 is connected to the bottom of the blind hole of the power connection base 401 through a first spring 403, and the first power connection head 402 shuttles in the blind hole.

[0040] In a preferred embodiment, at least two conductive rings 8 are provided at the outer end of the lock core 1 near the keyhole. The first power connection head 402 passes through the lock core housing 2 and abuts against the conductive ring 8.

[0041] In a preferred embodiment, at least two blind holes are provided on one side of the keyhole inside the lock core 1 and perpendicular to the plane of the tooth part of the passive key 6. A second power connection head 9 is provided inside the blind hole. The bottom end of the second power connection head 9 is connected to the bottom of the blind hole through a second spring 901;

[0042] A wire is also provided at the bottom end of the first power connection head 402. One end of the wire is connected to the end of the first power connection head 402, and the other end passes through the power connection base 401 and is electrically connected to the bolt mechanism 3 and the control system 5;

[0043] A conductive column 902 is also provided at the bottom end of the second power connection head 9. One end of the conductive column 902 is connected to the end of the second power connection head 9, and the other end is connected to the conductive ring 8.

[0044] In a preferred embodiment, when the passive key 6 is inserted into the keyhole of the lock core 1, the end of the second power connection head 9 abuts against the signal contact 603 to supply power to the inside of the lock core 1.

[0045] Specifically, the electrical energy generated inside the passive key 6 is transmitted from the power connection contact 603, through the second power connection head 9, the conductive column 902, the wire ring 8, and the first power connection head 402 to the bolt mechanism 3 and the control system 5. At the same time, as the electrical energy is transmitted, the information authentication system inside the control system 5 is activated, sending an identity authentication request to the passive key 6. After the passive key 6 is successfully verified, the control system 5 is authorized to send an unlock signal to the bolt mechanism 3, and the bolt mechanism 3 can then drive the locking column 301 to unlock.

[0046] In a preferred embodiment, the structure of the bolt mechanism 3 is as follows: the lower end of the locking column 301 is connected to one side of the rack 302 through an L-shaped connecting plate 306. On the other side of the rack 302, there is a driving motor 303, whose output shaft is connected to a gear 304. The gear 304 meshes with the front teeth of the rack 302 to control the driving motor 303 to drive the locking column 301 to slide in the locking hole 101.

[0047] Specifically, when the bolt mechanism 3 receives the unlock signal transmitted from the control system 5, the driving motor 302 drives the output shaft gear 304 to rotate through the electric energy obtained from the power receiving component 4. The gear 304 drives the rack 302 to move downward in the back plate 305, thereby driving the locking column 301 on one side to retract from the locking hole 101, realizing the unlocking of the rotation of the lock core 1.

[0048] In a preferred embodiment, a T-shaped slider is provided on the rear side of the rack 302, and a mating T-shaped sliding groove is provided in the back plate 305. The rack 302 is slidably connected to the inner wall of the lower cavity of the lock core housing 2 through the back plate 305;

[0049] A U-shaped lock column seat 307 is further provided at the lower end of the locking column 301. The lower end of the locking column 301 is connected to the bottom of the U-shaped lock column seat 307 through a third spring 308. The inner surface of the U-shaped lock column seat 307 is adapted to the outer surface of the locking column 301, and the locking column 301 slides in the U-shaped lock column seat 307.

[0050] Specifically, by providing the U-shaped lock column seat 307, the vertical sliding path of the locking column 301 is restricted to prevent it from shifting due to external impact, thereby unlocking by improper means. When the passive key 6 is removed from the inside of the lock core 1 or the unlocking operation is completed, the driving motor 303 no longer applies a downward force to the locking column 301. The locking column 301 is inserted into the locking hole 101 under the pushing of the third spring 308, realizing the re-locking of the bolt mechanism 3 to the lock core 1.

[0051] In a preferred embodiment, the power receiving component 4 is provided on one side above the control system 5, and the driving motor 303 is provided on the other side above the control system 5;

[0052] A step ring 201 is provided at the rear end of the lock core housing 2, and a mating annular groove 102 is provided at the rear end of the lock core 1. The step ring 201 is arranged in the annular groove 102 to limit the axial movement of the lock core 1. The rear end of the lock core 1 is connected to the lock tongue 10.

[0053] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should 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 passive intelligent lock based on electromagnetic induction, characterized in that: It includes a passive intelligent lock core (1) and a passive key (6). The lock core (1) is arranged inside a lock core housing (2). Inside the cavity below the lock core housing (2), there are a locking bolt mechanism (3), a power connection component (4), and a control system (5). The locking post (301) in the locking bolt mechanism (3) passes through the lock core housing (2) and inserts into the locking hole (101) of the lock core (1). Inside the lock core housing (2), there are permanent magnets (7) with opposite magnetic poles, forming a magnetic field perpendicular to the plane of the tooth part of the passive key (6). When the passive key (6) is inserted into the keyhole of the lock core (1), an induced current is generated in the internal conductor coil (601), and a temporary power supply is provided to the locking bolt mechanism (3) through the power connection component (4) to drive the retraction of the locking post (301), and the passive key (6) drives the lock core (1) to rotate to unlock the lock.

2. The passive intelligent lock based on electromagnetic induction according to claim 1, characterized in that: The permanent magnets (7) are two opposite magnetic poles with an arc-shaped cross-section, symmetrically arranged inside the outer ring of the lock core housing (2) of the lock core (1), forming a magnetic field perpendicular to the plane of the tooth part when the passive key (6) is inserted into the keyhole of the lock core (1). The length of the permanent magnets (7) is adapted to the length of the tooth part of the passive key (6).

3. The passive intelligent lock based on electromagnetic induction according to claim 1, characterized in that: Inside the tooth part of the passive key (6), there are multiple groups of conductor coils (601), and the conductor coils (601) are electrically connected to the electronic control component (602) inside the handle of the passive key (6); On the outer surface of the tooth part of the passive key (6), there are also multiple signal contacts (603), and the signal contacts (603) are electrically connected to the electronic control component (602).

4. The passive intelligent lock based on electromagnetic induction according to claim 1 is characterized in that: The structure of the power connection component (4) is: on the power connection seat (401), there are at least two first power connection heads (402). The bottom end of the first power connection head (402) is connected to the bottom of the blind hole of the power connection seat (401) through a first spring (403), and the first power connection head (402) shuttles in the blind hole.

5. The passive intelligent lock based on electromagnetic induction according to claim 4, wherein: On the outer end of the lock core (1) near the keyhole, there are at least two conductive rings (8), and the first power connection head (402) passes through the lock core housing (2) and abuts against the conductive rings (8).

6. The passive intelligent lock based on electromagnetic induction according to claim 4 is characterized in that: On one side of the keyhole inside the lock core (1), and perpendicular to the plane of the tooth part of the passive key (6), there are at least two blind holes. Inside the blind holes, there are second power connection heads (9). The bottom end of the second power connection head (9) is connected to the bottom of the blind hole through a second spring (901); At the bottom end of the first power connection head (402), there is also a wire. One end of the wire is connected to the end of the first power connection head (402), and the other end passes through the power connection seat (401) and is electrically connected to the locking bolt mechanism (3) and the control system (5); At the bottom end of the second power connection head (9), there is also a conductive column (902). One end of the conductive column (902) is connected to the end of the second power connection head (9), and the other end is connected to the conductive ring (8).

7. The passive intelligent lock based on electromagnetic induction according to claim 6, wherein: When the passive key (6) is inserted into the keyhole of the lock core (1), the end of the second power connection head (9) abuts against the signal contact (603) to supply power to the inside of the lock core (1).

8. The passive intelligent lock based on electromagnetic induction according to claim 1 is characterized in that: The structure of the bolt mechanism (3) is as follows: the lower end of the locking column (301) is connected to one side of the rack (302) through an L-shaped connecting plate (306), a driving motor (303) is provided on the other side of the rack (302), the output shaft thereof is connected to a gear (304), the gear (304) meshes with the front tooth part of the rack (302), and the driving motor (303) is controlled to drive the locking column (301) to slide in the locking hole (101).

9. The passive intelligent lock based on electromagnetic induction according to claim 8, characterized in that: A T-shaped slider is provided on the rear side of the rack (302), a T-shaped sliding groove adapted thereto is provided in the back plate (305), and the rack (302) is slidably connected to the inner wall of the lower cavity of the lock core housing (2) through the back plate (305); A U-shaped lock column seat (307) is further provided at the lower end of the locking column (301), the lower end of the locking column (301) is connected to the bottom of the U-shaped lock column seat (307) through a third spring (308), the inner surface of the U-shaped lock column seat (307) is adapted to the outer surface of the locking column (301), and the locking column (301) slides in the U-shaped lock column seat (307).

10. The passive intelligent lock based on electromagnetic induction according to claim 1 is characterized in that: The power connection component (4) is arranged on one side above the control system (5), and the driving motor (303) is arranged on the other side above the control system (5); A stepped ring (201) is provided at the rear end of the lock core housing (2), an annular groove (102) adapted thereto is provided at the rear end of the lock core (1), the stepped ring (201) is arranged in the annular groove (102) to limit the axial movement of the lock core (1), and the rear end of the lock core (1) is connected to the lock tongue (10).

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