Anti-knocking electromagnetic lock

Abstract

The utility model discloses an anti-knocking electromagnetic lock, which solves the problem that the electromagnetic lock is knocked to unlock, and comprises a lock shell, and a spring bolt, an elastic piece, a deflector rod, a rotating shaft, a spring, a cylindrical pin and an electromagnet which are arranged in the lock shell, the lock shell is provided with an opening movably matched with the lock hook; the spring bolt is rotationally matched with the opening, and the first end of the spring bolt is used for locking the latch hook; the elastic piece is arranged opposite to the spring bolt and used for driving the spring bolt to rotate in the unlocking direction; the shifting rod is rotationally matched in the lock shell, and the first end of the shifting rod movably abuts against the second end of the spring bolt to limit unlocking; the rotating shaft is rotationally matched in the lock shell and is opposite to the second end of the deflector rod, and a first groove is formed in the circumferential surface of the rotating shaft; the spring and the cylindrical pin are sequentially embedded into the second end of the deflector rod, and the cylindrical pin is embedded into the first groove under the action of the spring so that the rotating shaft can be linked with the deflector rod; the output end of the electromagnet is in transmission connection with the rotating shaft to drive the rotating shaft to rotate.

Description

Technical Field

[0001] This utility model belongs to the field of intelligent electromagnetic lock technology, and specifically refers to an anti-knock electromagnetic lock. Background Technology

[0002] Smart electromagnetic locks are the result of the cross-integration of traditional electromagnetic technology with cutting-edge fields such as the Internet of Things, biometrics, and AI. Their development relies on the miniaturization of electronic hardware, the improvement of communication technology reliability, and the innovation of security protection mechanisms. With the deepening of smart cities and smart homes, smart electromagnetic locks will further evolve towards higher security, lower power consumption, and seamless integration.

[0003] Since electromagnetic locks use the attraction of electromagnets to open and close, most electromagnetic locks may unlock themselves when subjected to external force or vibration, posing a significant safety hazard. Utility Model Content

[0004] The main purpose of this utility model is to provide an anti-knock electromagnetic lock to solve the problem of electromagnetic locks being unlocked by knocking.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] An anti-knock electromagnetic lock includes a lock housing, and a bolt, an elastic element, a lever, a pivot, a spring, a cylindrical pin, and an electromagnet disposed within the lock housing. The lock housing has an opening for a lock hook to engage movably. The bolt rotatably engages with the opening, with its first end used to lock the lock hook. The elastic element is disposed opposite to the bolt and is used to drive the bolt to rotate in the unlocking direction. The lever rotatably engages with the lock housing, with its first end movably abutting against the second end of the bolt to restrict unlocking. The pivot rotatably engages with the lock housing and is disposed opposite to the second end of the lever, with a first groove provided on its circumference. The spring and the cylindrical pin are sequentially embedded in the second end of the lever, and the cylindrical pin is embedded in the first groove under the action of the spring to link the pivot and the lever. The output end of the electromagnet is drivenly connected to the pivot and is used to drive the pivot to rotate.

[0007] The rotating shaft is configured to rotate counterclockwise for unlocking, and a protrusion is provided on the left side of its first groove. The protrusion moves and abuts against the side of the second end of the lever as the rotating shaft rotates. Alternatively, the rotating shaft is configured to rotate clockwise for unlocking, and a protrusion is provided on the right side of its first groove. The protrusion moves and abuts against the side of the second end of the lever as the rotating shaft rotates.

[0008] The first end of the latch is provided with a hook for locking the lock hook, and the hook is hooked onto the lock hook.

[0009] The elastic element is a torsion spring coaxially arranged with the latch, and its two ends respectively abut against the latch and the lock housing.

[0010] The second end of the lever has a recessed end face forming a countersunk hole for the spring and cylindrical pin to move and engage.

[0011] A connecting rod is provided on the side of the rotating shaft near the electromagnet, and the connecting rod passes through a metal rod located at the output end of the electromagnet.

[0012] The surface of the rotating shaft has a second groove and a third groove recessed on the side closer to the electromagnet and the side farther away from the electromagnet, respectively. The second groove and the third groove are located on the left and right sides of the first groove, respectively.

[0013] The anti-knock electromagnetic lock also includes a micro switch disposed inside the lock housing and opposite to the first end of the bolt, for detecting the lock's open / closed status.

[0014] After adopting the above technical solution, the present invention has the following technical effects:

[0015] This invention utilizes the linkage between an electromagnet, a rotating shaft, and a lever to control whether the lever restricts the rotation of the latch. When the lever disengages from the position restricting the latch, the latch automatically unlocks under the action of the elastic element. Furthermore, the second end of the lever engages with the first groove via a spring and a cylindrical pin as a clutch assembly. When the lock is struck by an external force, the cylindrical pin compresses the spring due to the impact force, causing it to retract into the second end of the lever. Ultimately, the cylindrical pin disengages from the rotating shaft, and the lever no longer rotates under the influence of external force. The electromagnetic lock remains locked and will not automatically unlock due to impact, thus improving security. Attached Figure Description

[0016] Figure 1 This is an exploded view of a specific embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the locked state in a specific embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the unlocking state of a specific embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the clutch state (anti-knock effect) of a specific embodiment of this utility model;

[0020] Explanation of icon numbers:

[0021] 1-Front cover; 11-Front opening; 2-Rear cover; 21-Rear opening; 3-Lock tongue; 31-Hook; 4-Elastic element; 5-Lever; 6-Shaft; 61-First groove; 62-Protrusion; 63-Connecting rod; 64-Second groove; 65-Third groove; 7-Spring; 8-Cylindrical pin; 9-Electromagnet; 91-Metal rod; 10-Micro switch; a-Lock hook. Detailed Implementation

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

[0023] refer to Figure 1-4 As shown, this utility model discloses an anti-knock electromagnetic lock, including a lock shell composed of a front cover 1 and a rear cover 2, and a lock tongue 3, an elastic element 4, a lever 5, a rotating shaft 6, a spring 7, a cylindrical pin 8 and an electromagnet 9 disposed in the lock shell.

[0024] The lock case is provided with an opening for the lock hook a to move and engage, and the opening is composed of the front opening 11 of the front cover 1 and the rear opening 21 of the rear cover 2.

[0025] The locking tongue 3 rotates and engages at the opening, and its first end is used to lock the locking hook a;

[0026] The elastic element 4 is disposed opposite to the locking tongue 3 and is used to provide a force to rotate the locking tongue 3 in the unlocking direction;

[0027] The lever 5 rotates and engages within the lock housing, with its first end moving to abut against the second end of the bolt 3 to restrict unlocking, i.e., restrict the bolt 3 from rotating in the unlocking direction;

[0028] The rotating shaft 6 is rotatably fitted inside the lock housing and is positioned opposite to the second end of the lever 5. Its circumferential surface is provided with a first groove 61 facing the lever 5.

[0029] Spring 7 and cylindrical pin 8 are sequentially embedded into the second end of lever 5. Under the action of spring 7, cylindrical pin 8 is embedded into the first groove 61 so that rotating shaft 6 and lever 5 are linked.

[0030] The output end of electromagnet 9 is connected to the rotating shaft 6 for driving the rotating shaft 6 to rotate.

[0031] Through the above scheme, this utility model achieves the output action of electromagnet 9 to control whether lever 5 restricts the rotation of latch 3 by the linkage between electromagnet 9, rotating shaft 6 and lever 5. When lever 5 disengages from the position restricting latch 3, latch 3 will automatically unlock under the action of elastic element 4. On this basis, the second end of lever 5 and the circumference of rotating shaft 6 are engaged with the first groove 61 by using spring 7 and cylindrical pin 8 as a clutch component. When the lock is hit by external force, cylindrical pin 8 will compress spring 7 due to the impact force and retract into the second end of lever 5, eventually disengaging cylindrical pin 8 from rotating shaft 6. Lever 5 will no longer be affected by external force and will not rotate (in the same state, the first end of lever 5 is pressed by latch 3, and latch 3 continuously applies pressure to the end of lever 5 under the action of elastic element 4 to prevent lever 5 from rotating). The electromagnetic lock remains locked and will not automatically unlock due to impact, thus improving security.

[0032] The following are specific embodiments of the present invention.

[0033] The aforementioned rotating shaft 6 is configured to rotate counterclockwise for unlocking. A protrusion 62 is located on the left side of its first groove 61. This protrusion 62 moves and abuts against the side of the second end of the lever 5 as the rotating shaft 6 rotates. Therefore, the first groove 61 of the rotating shaft 6 has a left-high, right-low design, with the right side responsible for unlocking and the left side for locking: when the cylindrical pin 8 inside the lever 5 retracts, it disengages from the rotating shaft 6 in the unlocking direction; even if the cylindrical pin 8 is fully retracted, the left side of the rotating shaft 6 can still bring the lever 5 back to the locking position, ensuring that the lock can still be used normally after being struck. Similarly, when the rotating shaft 6 is configured to rotate clockwise for unlocking, the protrusion 62 is located on the right side of the first groove 61.

[0034] The first end of the aforementioned latch 3 is provided with a hook portion 31 for locking the hook a. The hook portion 31 hooks onto the hook a to prevent the hook a from disengaging from the opening. When the latch 3 rotates in the unlocking direction, the hook portion 31 disengages from the hook a.

[0035] The aforementioned elastic element 4 is a torsion spring coaxially arranged with the latch 3, and its two ends respectively abut against the latch 3 and the lock shell.

[0036] The end face of the second end of the aforementioned lever 5 is recessed to form a countersunk hole for the spring 7 and the cylindrical pin 8 to move and engage.

[0037] A connecting rod 63 is provided on the side of the rotating shaft 6 near the electromagnet 9. The connecting rod 63 passes through the metal rod 91 located at the output end of the electromagnet 9 to realize the transmission connection between the two. In this embodiment, when the electromagnet 9 is energized, it will attract the metal rod 91, thereby causing the rotating shaft 6 to rotate under force.

[0038] See Figure 2The surface of the aforementioned rotating shaft 6 has a second groove 64 and a third groove 65 recessed on the side closer to and farther from the electromagnet 9, respectively. The second groove 64 and the third groove 65 are located on the left and right sides of the first groove 61, respectively. By adding two more grooves, the weight on the left and right sides of the rotating shaft 6 can be balanced, and the center of gravity of the rotating shaft 6 can be lowered, thereby improving stability.

[0039] This utility model also includes a micro switch 10 disposed inside the lock housing and opposite to the first end of the lock tongue 3, for detecting the lock's open / closed state.

[0040] refer to Figure 4 As shown, the working principle of this utility model is as follows:

[0041] The lock housing is equipped with a bolt 3, on which a torsion spring (i.e., elastic element 4) is mounted. The torsion spring continuously applies a clockwise rotational torque to the bolt 3. A lever 5 is located at the end of the bolt 3. In the locked state, the lever 5 holds the bolt 3 in place, preventing it from rotating to unlock. The other end of the lever 5 is equipped with a shaft 6, which is connected to an electromagnet 9. When the electromagnet 9 is attracted, it causes the shaft 6 to rotate counterclockwise. The shaft 6 has a first groove 61, which pushes the lever 5 to rotate clockwise. After the lever 5 has rotated a certain angle, it no longer holds the bolt 3, at which point the bolt 3 will rotate clockwise to unlock under the force of the torsion spring.

[0042] The key to its impact resistance lies in the cylindrical pin 8 installed between the lever 5 and the pivot 6. The cylindrical pin 8 is installed in the countersunk hole of the lever 5, and the tail of the cylindrical pin 8 is equipped with a spring 7. When the lock is struck, the cylindrical pin 8 will compress the spring 7 at the tail due to the striking force and retract into the countersunk hole. Finally, the cylindrical pin 8 will disengage from the pivot 6, and the lever 5 will no longer be affected by external force and will remain locked.

[0043] 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. An anti-knock electromagnetic lock, characterized in that: It includes a lock housing, and a lock tongue, an elastic element, a lever, a pivot, a spring, a cylindrical pin, and an electromagnet disposed within the lock housing; The lock housing is provided with an opening for the lock hook to move and engage; The locking tongue rotates and engages at the opening, with its first end used to lock the locking hook. The elastic element is disposed opposite to the locking tongue and is used to drive the locking tongue to rotate in the unlocking direction; The lever rotates and engages within the lock housing, with its first end moving to abut against the second end of the bolt to restrict unlocking. The rotating shaft is rotatably fitted inside the lock housing and is positioned opposite to the second end of the lever, with a first groove provided on its circumferential surface; The spring and the cylindrical pin are sequentially embedded in the second end of the lever, and the cylindrical pin is embedded in the first groove under the action of the spring so that the rotating shaft is linked with the lever; The output end of the electromagnet is connected to the rotating shaft for driving the rotating shaft to rotate.

2. The anti-knock electromagnetic lock as described in claim 1, characterized in that: The rotating shaft is configured to rotate counterclockwise in the unlocking direction, and a protrusion is provided on the left side of its first groove. The protrusion moves and abuts against the side of the second end of the lever as the rotating shaft rotates.

3. The anti-knock electromagnetic lock as described in claim 1, characterized in that: The rotating shaft is configured to rotate clockwise for unlocking, and a protrusion is provided on the right side of its first groove. The protrusion moves and abuts against the side of the second end of the lever as the rotating shaft rotates.

4. The anti-knock electromagnetic lock as described in claim 1, characterized in that: The first end of the latch is provided with a hook for locking the lock hook, and the hook is hooked onto the lock hook.

5. The anti-knock electromagnetic lock as described in claim 1, characterized in that: The elastic element is a torsion spring coaxially arranged with the latch, and its two ends respectively abut against the latch and the lock housing.

6. The anti-knock electromagnetic lock as described in claim 1, characterized in that: The second end of the lever has a recessed end face forming a countersunk hole for the spring and cylindrical pin to move and engage.

7. The anti-knock electromagnetic lock as described in claim 1, characterized in that: A connecting rod is provided on the side of the rotating shaft near the electromagnet, and the connecting rod passes through a metal rod located at the output end of the electromagnet.

8. The anti-knock electromagnetic lock as described in claim 1, characterized in that: The surface of the rotating shaft has a second groove and a third groove recessed on the side closer to the electromagnet and the side farther away from the electromagnet, respectively. The second groove and the third groove are located on the left and right sides of the first groove, respectively.

9. The anti-knock electromagnetic lock as described in claim 1, characterized in that: It also includes a micro switch disposed inside the lock housing and opposite to the first end of the lock tongue, for detecting the lock's open / closed state.

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