Anti-knocking electromagnetic lock

Abstract

The invention discloses an anti-knock 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] The invention belongs to the technical field of intelligent electromagnetic locks, and in particular relates to an anti-knock electromagnetic lock. Background Art

[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 depends on the miniaturization of electronic hardware, the improvement of the reliability of communication technology, and the innovation of security protection mechanisms. With the deepening of smart cities and smart homes, smart electromagnetic locks will further evolve towards high security, low power consumption, and seamless integration.

[0003] Since electromagnetic locks use the attraction of electromagnets to open and close the lock, most electromagnetic locks may unlock themselves when struck and vibrated by external force, posing a major safety hazard. Summary of the invention

[0004] The main purpose of the present invention is to provide an anti-knock electromagnetic lock to solve the problem that the electromagnetic lock is unlocked by being knocked.

[0005] In order to achieve the above object, the solution of the present invention is: A knock-resistant electromagnetic lock comprises a lock shell, and a lock tongue, an elastic member, a lever, a rotating shaft, a spring, a cylindrical pin and an electromagnet arranged in the lock shell; the lock shell is provided with an opening for a lock hook to movably engage with; the lock tongue is rotatably engaged at the opening, and its first end is used to lock the lock hook; the elastic member is arranged opposite to the lock tongue, and is used to drive the lock tongue to rotate in the unlocking direction; the lever is rotatably engaged in the lock shell, and its first end movably abuts against the second end of the lock tongue to achieve restricted unlocking; the rotating shaft is rotatably engaged in the lock shell, and is arranged opposite to the second end of the lever, and a first groove is arranged 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 to enable the rotating shaft to be linked with the lever; the output end of the electromagnet is transmission-connected to the rotating shaft, and is used to drive the rotating shaft to rotate.

[0006] The rotating shaft is configured to rotate counterclockwise as the unlocking direction, and a protrusion is provided on the left side of the first groove, and the protrusion abuts against the side surface of the second end of the lever as the rotating shaft rotates. Alternatively, the rotating shaft is configured to rotate clockwise as the unlocking direction, and a protrusion is provided on the right side of the first groove, and the protrusion abuts against the side surface of the second end of the lever as the rotating shaft rotates.

[0007] The first end of the locking tongue is provided with a hook portion for locking the locking hook, and the hook portion is hooked on the locking hook.

[0008] The elastic member is a torsion spring coaxially arranged with the lock tongue, and two ends of the elastic member respectively abut against the lock tongue and the lock housing.

[0009] The end surface of the second end of the shifting rod is concave to form a countersunk hole for the spring and the cylindrical pin to flexibly cooperate with each other.

[0010] A connecting rod is arranged on one side of the rotating shaft close to the electromagnet, and the connecting rod penetrates a metal rod located at the output end of the electromagnet.

[0011] The surface of the rotating shaft is concavely formed with a second groove and a third groove at a side close to and away from the electromagnet, respectively. The second groove and the third groove are located at the left and right sides of the first groove, respectively.

[0012] The anti-knock electromagnetic lock also includes a micro switch arranged in the lock housing and opposite to the first end of the lock tongue, which is used to detect the switch lock state of the lock.

[0013] After adopting the above technical solution, the present invention has the following technical effects: The present invention realizes the output action of the electromagnet to control whether the lever restricts the rotation of the lock tongue through the linkage between the electromagnet, the rotating shaft and the lever. When the lever is separated from the position restricting the lock tongue, the lock tongue will automatically unlock under the action of the elastic member. On this basis, the second end of the lever and the circumferential surface of the rotating shaft are matched with the first groove by using a spring and a cylindrical pin as a clutch component. When the lock is struck by an external force, the cylindrical pin will compress the spring due to the striking force and retract into the second end of the lever, finally causing the cylindrical pin to be separated from the rotating shaft, and the lever will no longer rotate under the influence of the external force. The electromagnetic lock remains in a locked state and will not be automatically unlocked due to the knocking, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An exploded view of a specific embodiment of the present invention; Figure 2 A schematic diagram of a locked state of a specific embodiment of the present invention; Figure 3 It is a schematic diagram of the unlocking state of a specific embodiment of the present invention; Figure 4 It is a schematic diagram of the clutch state (anti-knock effect) of a specific embodiment of the present invention; Description of Figure Numbers: 1-front cover; 11-front opening; 2-rear cover; 21-rear opening; 3-lock tongue; 31-hook; 4-elastic member; 5-shift lever; 6-rotating 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 DESCRIPTION

[0015] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0016] refer to Figure 1-4 As shown, the present invention discloses an anti-knock electromagnetic lock, comprising a lock housing composed of a front cover 1 and a rear cover 2, and a lock tongue 3, an elastic member 4, a lever 5, a rotating shaft 6, a spring 7, a cylindrical pin 8 and an electromagnet 9 arranged in the lock housing; The lock housing is provided with an opening for the lock hook a to flexibly cooperate with, and the opening is composed of a front opening 11 of the front cover 1 and a rear opening 21 of the rear cover 2; The lock tongue 3 is rotatably engaged in the opening, and its first end is used to lock the lock hook a; The elastic member 4 is arranged opposite to the lock tongue 3, and is used to provide a force for rotating the lock tongue 3 in the unlocking direction; The lever 5 is rotatably engaged in the lock housing, and its first end movably abuts against the second end of the lock tongue 3 to limit unlocking, that is, to limit the lock tongue 3 from rotating in the unlocking direction; The rotating shaft 6 is rotatably fitted in the lock housing and is arranged opposite to the second end of the lever 5. The circumferential surface of the rotating shaft 6 is provided with a first groove 61 facing the lever 5. The spring 7 and the cylindrical pin 8 are sequentially embedded in the second end of the lever 5. Under the action of the spring 7, the cylindrical pin 8 is embedded in the first groove 61 to enable the rotating shaft 6 to be linked with the lever 5. The output end of the electromagnet 9 is drivingly connected to the rotating shaft 6 for driving the rotating shaft 6 to rotate.

[0017] Through the above scheme, the present invention realizes the output action of the electromagnet 9 to control whether the lever 5 restricts the rotation of the lock tongue 3 through the linkage between the electromagnet 9, the rotating shaft 6 and the lever 5. When the lever 5 is out of the position restricting the lock tongue 3, the lock tongue 3 will be automatically unlocked under the action of the elastic member 4; on this basis, the second end of the lever 5 and the circumferential surface of the rotating shaft 6 are matched with the first groove 61 by using the spring 7 and the cylindrical pin 8 as a clutch component. When the lock is hit by an external force, the cylindrical pin 8 will compress the spring 7 due to the knocking force to retract into the second end of the lever 5, and finally the cylindrical pin 8 will be separated from the rotating shaft 6, and the lever 5 will no longer be affected by the external force and rotate (in the same state, the first end of the lever 5 is pressed by the lock tongue 3, and the lock tongue 3 continues to apply a pressure to the end of the lever 5 under the action of the elastic member 4 to prevent the lever 5 from rotating), and the electromagnetic lock remains in a locked state and will not be automatically unlocked due to knocking, thereby improving safety.

[0018] Specific embodiments of the present invention are shown below.

[0019] The above-mentioned rotating shaft 6 is set to rotate counterclockwise as the unlocking direction, and a protrusion 62 is set on the left side of its first groove 61. The protrusion 62 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 design of left high and right low. The right side is responsible for unlocking and the left side is responsible for locking: the cylindrical pin 8 in the lever 5 is disengaged from the rotating shaft 6 in the unlocking direction after it is retracted; and even if the cylindrical pin 8 is completely retracted, the left side of the rotating shaft 6 can also bring the lever 5 back to the locked position, ensuring that the lock can still be used normally after being knocked. Similarly, when the rotating shaft 6 is set to rotate clockwise as the unlocking direction, the protrusion 62 is set on the right side of the first groove 61.

[0020] The first end of the lock tongue 3 is provided with a hook portion 31 for locking the lock hook a, and the hook portion 31 is hooked on the lock hook a to prevent the lock hook a from being separated from the opening. When the lock tongue 3 rotates in the unlocking direction, the hook portion 31 is separated from the lock hook a.

[0021] The elastic member 4 is a torsion spring coaxially arranged with the lock tongue 3 , and two ends thereof abut against the lock tongue 3 and the lock housing respectively.

[0022] The end surface of the second end of the lever 5 is concave to form a countersunk hole for the spring 7 and the cylindrical pin 8 to flexibly cooperate with each other.

[0023] A connecting rod 63 is provided on one side of the rotating shaft 6 close to the electromagnet 9, and the connecting rod 63 is passed through the metal rod 91 at the output end of the electromagnet 9 to achieve a transmission connection between the two. In this embodiment, when the electromagnet 9 is energized, the metal rod 91 is attracted, so that the rotating shaft 6 is rotated under force.

[0024] See also Figure 2 The surface of the rotating shaft 6 is respectively recessed to form a second groove 64 and a third groove 65 on the side close to and away from the electromagnet 9, and the second groove 64 and the third groove 65 are respectively located on the left and right sides of the first groove 61. By providing 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 moved downward to improve stability.

[0025] The present invention further comprises a micro switch 10 disposed in the lock housing and opposite to the first end of the lock tongue 3, for detecting the switch lock state of the lock.

[0026] refer to Figure 4 As shown, the working principle of the present invention is: The lock housing is provided with a lock tongue 3, and a torsion spring (i.e., elastic member 4) is installed on the lock tongue 3. The torsion spring continuously applies a clockwise torque to the lock tongue 3. A lever 5 is provided at the tail of the lock tongue 3. In the locked state, the lever 5 presses against the lock tongue 3, so that the lock tongue 3 will not rotate to unlock. A rotating shaft 6 is provided at the other end of the lever 5, and the rotating shaft 6 is connected to an electromagnet 9. When the electromagnet 9 is attracted, the rotating shaft 6 will rotate counterclockwise. A first groove 61 is provided on the rotating shaft 6, and the first groove 61 pushes the lever 5 to rotate clockwise. When the lever 5 rotates a certain angle and no longer presses against the lock tongue 3, the lock tongue 3 will rotate clockwise to unlock under the action of the torsion spring.

[0027] Among them, the key to anti-knock is that a cylindrical pin 8 is provided between the lever 5 and the rotating shaft 6. The cylindrical pin 8 is installed in the countersunk hole of the lever 5, and a spring 7 is provided at the tail of the cylindrical pin 8. When the lock is knocked, the cylindrical pin 8 will shrink into the countersunk hole due to the compression of the spring 7 at the tail due to the knocking force. Finally, the cylindrical pin 8 is separated from the rotating shaft 6, and the lever 5 will no longer rotate under the influence of external force, and the lock will continue to remain locked.

[0028] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An anti-knock electromagnetic lock, characterized in that: It includes a lock housing, and a lock tongue, an elastic member, a lever, a rotating shaft, a spring, a cylindrical pin and an electromagnet arranged in the lock housing; The lock housing is provided with an opening for the lock hook to flexibly engage with; The locking tongue is rotatably engaged in the opening, and the first end thereof is used to lock the locking hook; The elastic member is arranged opposite to the lock tongue and is used to drive the lock tongue to rotate in the unlocking direction; The lever is rotatably engaged in the lock housing, and the first end of the lever movably abuts against the second end of the lock tongue to achieve restricted unlocking; The rotating shaft is rotatably fitted in the lock housing and is arranged opposite to the second end of the lever, and a first groove is arranged 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 enable the rotating shaft to be linked with the lever; The output end of the electromagnet is drivingly connected to the rotating shaft for driving the rotating shaft to rotate.

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

3. The anti-knock electromagnetic lock according to claim 1, characterized in that: The rotating shaft is arranged to rotate clockwise as the unlocking direction, and a protrusion is arranged on the right side of the first groove, and the protrusion abuts against the side surface of the second end of the lever as the rotating shaft rotates.

4. The anti-knock electromagnetic lock according to claim 1, characterized in that: The first end of the locking tongue is provided with a hook portion for locking the locking hook, and the hook portion is hooked on the locking hook.

5. The anti-knock electromagnetic lock according to claim 1, characterized in that: The elastic member is a torsion spring coaxially arranged with the lock tongue, and two ends of the elastic member respectively abut against the lock tongue and the lock housing.

6. The anti-knock electromagnetic lock according to claim 1, characterized in that: The end surface of the second end of the shifting rod is concave to form a countersunk hole for the spring and the cylindrical pin to flexibly cooperate with each other.

7. The anti-knock electromagnetic lock according to claim 1, characterized in that: A connecting rod is arranged on one side of the rotating shaft close to the electromagnet, and the connecting rod penetrates a metal rod located at the output end of the electromagnet.

8. The anti-knock electromagnetic lock according to claim 1, characterized in that: The surface of the rotating shaft is concavely formed with a second groove and a third groove at a side close to and away from the electromagnet, respectively. The second groove and the third groove are located at the left and right sides of the first groove, respectively.

9. The anti-knock electromagnetic lock according to claim 1, characterized in that: It also includes a micro switch arranged in the lock housing and opposite to the first end of the lock tongue, and is used to detect the switch lock state of the lock.

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