Electromagnetic lock with emergency unlocking function

Abstract

The utility model provides an electromagnetic lock with an emergency unlocking function, and relates to the technical field of locks. Comprising a shell, an electromagnetic assembly, a lock hook and an emergency assembly, the electromagnetic assembly, the lock hook and the emergency assembly are arranged in the shell, the lock hook is hinged to the interior of the shell, one end of the lock hook is provided with a clamping hook part suitable for buckling a lock catch, and the electromagnetic assembly is connected with the other end of the lock hook and suitable for driving the lock hook to rotate on the shell; further, the clamping hook part is controlled to buckle or loosen the lock catch; the emergency assembly comprises an emergency shifting piece and a positioning pin, and the emergency key is configured to be capable of releasing limitation of the positioning pin on the emergency shifting piece after the emergency shifting piece is inserted and driving the emergency shifting piece to rotate so as to control the clamping hook part of the lock hook to loosen the lock catch. According to the scheme, emergency unlocking can be achieved when the electromagnetic assembly is powered off, the structure is simple, and unlocking is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, and more specifically, to an electromagnetic lock with an emergency unlocking function. Background Art

[0002] In the electromagnetic lock market, most electromagnetic locks only have a simple function of locking and unlocking through an electromagnet. Once the electromagnet fails, the consequence of not being able to unlock will occur. The utility model patent CN108798284B discloses an electromagnetic lock structure for a shared refrigeration device, including an electromagnetic lock assembly. The electromagnetic lock assembly includes a lock shell, a solenoid valve, a lock tongue, a torsion spring, an unlocking block, an unlocking rod, and an unlocking block compression spring. There is a lock tongue hook cavity at the front end of the lock shell, and the lock tongue hook cavity communicates with the lock shell cavity. The solenoid valve is fixed in the lock shell cavity, and a valve core return spring is sleeved on the valve core. There is a lock tongue hook at the lower part of the lock tongue, and the lock tongue hook is supported on the lock tongue hook shaft. Both ends of the lock tongue hook shaft are fixed to the lock shell. The torsion spring is arranged on the lock tongue hook shaft. The first torsion spring foot of the torsion spring abuts against the upper part of the lock tongue, and the second torsion spring foot abuts against the middle part of the torsion spring foot stop pin. Both ends of the torsion spring foot stop pin are fixed to the lock shell. The unlocking block is pivotally arranged on the unlocking block shaft, and both ends of the unlocking block shaft are fixed to the lock shell. One end of the unlocking rod is fixed to the unlocking block, and the other end is the unlocking end. The unlocking block compression spring is arranged between the upper part of the unlocking block and the lock shell. When encountering situations such as power outage or electrical control device failure, the unlocking rod can be manually unlocked emergently. However, the structure for realizing emergency unlocking in this solution is relatively complex and is prone to failure during operation, resulting in the inability to unlock in an emergency situation. Especially when the lock hook is stuck tightly, mechanical driving is likely to cause damage to the emergency unlocking components. Utility Model Content

[0003] The utility model discloses an electromagnetic lock with an emergency unlocking function, aiming to improve the problems mentioned above.

[0004] The utility model adopts the following solutions:

[0005] An electromagnetic lock with an emergency unlocking function, including a housing, and further including: an electromagnetic component, a lock hook, and an emergency component arranged in the housing, wherein,

[0006] The lock hook is hinged to the housing through a pivot pin, and one end has a hook portion adapted to hook a lock catch. The electromagnetic component is connected to the other end of the lock hook and is used to drive the lock hook to rotate around the pivot pin, thereby controlling the hook portion to hook or release the lock catch;

[0007] The emergency component includes an emergency toggle and a positioning pin. The positioning pin is connected to the emergency toggle to limit the rotation of the emergency toggle. The emergency toggle is connected to the locking hook, and the emergency toggle has a matching emergency key. The emergency key is configured to release the rotation limit of the positioning pin on the emergency toggle after being inserted into the emergency toggle and drive the emergency toggle to rotate to control the hook portion of the locking hook to release the lock.

[0008] Further, the positioning pin is restricted in the housing to be slidable along the insertion direction of the emergency key. The emergency toggle includes a driving portion, a lock core hole, and a positioning hole adapted to be connected to one end of the positioning pin. A through hole is provided between the positioning hole and the lock core hole to communicate with each other. One end of the positioning pin is adapted to be inserted into the positioning hole to limit the rotation of the emergency toggle. The emergency key is adapted to match the lock core hole, and an unlocking portion adapted to pass through the through hole is provided at its end to push the positioning pin out of the positioning hole to release the rotation limit of the positioning pin on the emergency toggle. The driving portion is adapted to drive the locking hook to rotate when the emergency toggle rotates so that the hook portion releases the lock.

[0009] Further, the driving portion includes a toggle rib protruding from the outside of the emergency toggle. An inclined surface adapted to be in contact with the locking hook is provided on the toggle rib to drive the locking hook to lift along the inclined surface during rotation, thereby controlling the hook portion of the locking hook to release the lock.

[0010] Further, a first elastic member is provided at one end of the positioning pin away from the emergency toggle. The first elastic member is adapted to provide a force towards the emergency toggle to the positioning pin to insert one end of the positioning pin into the emergency toggle to limit the rotation of the emergency toggle when the emergency key is not inserted.

[0011] Further, a spring piece is provided at a position of the housing close to the hook portion of the locking hook. The spring piece is adapted to be compressed by the lock during the process of the lock being buckled into the locking hook and can release elastic force to eject the lock when the locking hook releases the lock.

[0012] Further, a micro switch is provided on the periphery of the spring piece. The spring piece is adapted to contact the pressing piece of the micro switch when the lock is buckled into the locking hook to make the micro switch in a connected state, and then feedback a signal to the controller for detecting the locked state. The spring piece is adapted to release the pressing piece of the micro switch when the lock is ejected to make the micro switch in a disconnected state, and then feedback a signal to the controller for detecting the unlocked state.

[0013] Further, the locking hook is hinged to the housing through a rotating shaft pin, and the electromagnetic assembly is adapted to drive one end of the locking hook to rotate around the rotating shaft pin to drive the hook portion at the other end to move, thereby releasing or fastening the lock catch.

[0014] Further, the electromagnetic assembly includes an electromagnet rod with a mounting hole and a compression spring arranged at one end of the mounting hole. One end of the locking hook away from the hook portion is adapted to be inserted into the mounting hole, and the compression spring is adapted to make the electromagnet rod extend to drive the hook portion to lift to the locked position when the emergency key is not inserted; the electromagnetic assembly is adapted to control the contraction of the electromagnet rod to pull the locking hook to rotate so that the hook portion descends to the unlocked position.

[0015] Beneficial effects:

[0016] Through this solution, mechanical unlocking can be achieved without power supply for emergency egress. The mechanical key and the electromagnetic assembly cooperate to unlock together. On the one hand, the mechanical key needs to match the lock core hole to improve the security of the lock. On the other hand, the mechanical key is provided with a positioning pin and cooperates with the locking hook through the driving portion, and can be reset through the automatic reset function of the electromagnetic assembly after unlocking and can be used again. The whole structure is more simplified, the production cost can be effectively reduced, and it is convenient for users to operate. Description of the drawings

[0017] Figure 1 is a schematic diagram of the external structure of an electromagnetic lock with an emergency unlocking function according to an embodiment of the present invention;

[0018] Figure 2 is an exploded structure schematic diagram of an electromagnetic lock with an emergency unlocking function according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the structure of an electromagnetic lock with an emergency unlocking function according to an embodiment of the present invention after removing the upper cover;

[0020] Figure 4 is a schematic diagram of the structure of an electromagnetic lock with an emergency unlocking function according to an embodiment of the present invention when the electromagnetic assembly is powered on;

[0021] Figure 5 is a schematic diagram of the structure of an electromagnetic lock with an emergency unlocking function according to an embodiment of the present invention when the electromagnetic assembly is powered off and the emergency key is inserted;

[0022] Figure 6 is a schematic diagram of unlocking an electromagnetic lock with an emergency unlocking function according to an embodiment of the present invention using an emergency key;

[0023] Icons: housing 1, lower housing 11, upper cover 12, limiting rib 13, electromagnetic component 2, electromagnet rod 21, compression spring 22, lock hook 3, hook portion 31, pin hole 32, emergency component 4, emergency lever 41, driving portion 411, inclined surface 4111, lock core hole 412, positioning hole 413, positioning pin 42, protrusion portion 421, emergency key 43, unlocking portion 431, special-shaped column 432, first elastic member 44, rotating shaft pin 5, lock catch 6, elastic piece 7, microswitch 8. Specific embodiments

[0024] Combined with Figures 1 to 6 As shown, this embodiment provides an electromagnetic lock with an emergency unlocking function, including a housing 1, and further including: an electromagnetic component 2, a lock hook 3, and an emergency component 4 disposed in the housing 1. Among them, the lock hook 3 is hinged in the housing 1 and one end has a hook portion 31 adapted to latch onto a lock catch 6. The electromagnetic component 2 is connected to the other end of the lock hook 3 and is adapted to drive the lock hook 3 to rotate on the housing 1, thereby controlling the hook portion 31 to latch onto or release the lock catch 6. The emergency component 4 includes an emergency lever 41 and a positioning pin 42. The positioning pin 42 is connected to the emergency lever 41 to limit the rotation of the emergency lever 41. The emergency lever 41 is adapted to be connected to the lock hook 3, and the emergency lever 41 has a matching emergency key 43. The emergency key 43 is configured to release the restriction of the positioning pin 42 on the emergency lever 41 after being inserted into the emergency lever 41 and drive the emergency lever 41 to rotate to control the hook portion 31 of the lock hook 3 to release the lock catch 6.

[0025] Combined with Figures 1 to 2 As shown, in this embodiment, the housing 1 can be assembled by a lower housing 11 and an upper cover 12. The electromagnetic component 2 includes an electromagnet rod 21 with a mounting hole, which can be controlled to expand and contract after being energized. Its principle and structure are prior arts and will not be elaborated here. One end of the electromagnet rod 21 where the mounting hole is provided is provided with a compression spring 22. When the electromagnetic component 2 is de-energized, the compression spring 22 can drive the electromagnet rod 21 to extend, so that the lock hook 3 is in a locked state. One end of the lock hook 3 away from the hook portion 31 is adapted to be inserted into the mounting hole, so that the compression spring 22 can drive the electromagnet rod 21 to extend to drive the hook portion 31 to lift to the locked position when the emergency key is not inserted; and when the electromagnetic component 2 is energized, it can control the electromagnet rod 21 to contract to pull the lock hook 3 to rotate so that the hook portion 31 descends to the unlocked position. At this time, the compression spring 22 is compressed to generate an elastic restoring force.

[0026] Combined with Figures 2 to 4As shown, the locking hook 3 is arranged in a strip shape. One end of the locking hook 3 is provided with a hook portion 31 for connecting with the lock catch 6, and the other end is adapted to be inserted into the mounting hole of the electromagnet rod 21. The locking hook 3 is hinged to the housing 1 through a rotating shaft pin 5. The electromagnetic assembly 2 is adapted to drive one end of the locking hook 3 to rotate around the rotating shaft pin 5, so as to drive the hook portion 31 at the other end to move, thereby releasing or locking the lock catch 6. The rotating shaft pin 5 is installed on the housing 1. A pin hole 32 is arranged at a position near the middle of the locking hook 3 for the rotating shaft pin 5 to be inserted. In an embodiment, the rotating shaft pin 5 is arranged on the side close to the hook portion 31. Thus, according to the lever principle, a smaller driving torque can be used to drive the hook portion 31 to rotate, reducing the force required for unlocking and facilitating unlocking. In this solution, an opening suitable for the lock catch 6 to enter is formed in the housing 1 at the hook portion 31 of the locking hook 3. The lock catch 6 enters the range of the hook portion 31 through the opening and is hooked by the hook portion 31 to enter the locked state.

[0027] Combined with Figures 2 to 6 As shown, in an embodiment, a spring piece 7 is arranged at a position of the housing 1 close to the hook portion 31 of the locking hook 3. The spring piece 7 is adapted to be compressed by the lock catch 6 during the process of the lock catch 6 being buckled into the locking hook 3, and can release elastic force to eject the lock catch 6 when the locking hook 3 releases the lock catch 6. Preferably, a micro switch 8 is arranged on the peripheral side of the spring piece 7. The spring piece 7 is adapted to contact the pressing piece of the micro switch 8 when the lock catch 6 is buckled into the locking hook 3, so that the micro switch 8 is in a connected state, and then feedback a signal to the controller for detecting the locked state. And the spring piece 7 is adapted to release the pressing piece of the micro switch 8 when ejecting the lock catch 6, so that the micro switch 8 is in a disconnected state, and then feedback a signal to the controller for detecting the unlocked state. That is to say, in this solution, by arranging the spring piece 7 on the peripheral side of the hook portion 31 of the locking hook 3, on the one hand, it is used to trigger the micro switch 8 after the lock catch 6 is hooked by the locking hook 3 to indicate the locked state. And in the locked state, the spring piece 7 remains in a compressed state to keep pressing the pressing piece of the micro switch 8, so as to feedback the current state. When the locking hook 3 rotates to release the lock catch 6, the lock catch 6 can be ejected out of the range of the hook portion 31 through the elastic recovery of the spring piece 7, so as to quickly unlock and prevent the lock catch 6 from remaining in the locking hook 3 after unlocking, resulting in unlocking failure. The micro switch 8 is a prior art and will not be elaborated here.

[0028] In this embodiment, the positioning pin 42 is restricted in the housing 1 to be slidable along the insertion direction of the emergency key 43. The emergency dial 41 includes a driving portion 411, a lock core hole 412, and a positioning hole 413 adapted to be movably connected to one end of the positioning pin 42. A through hole is provided between the positioning hole 413 and the lock core hole 412 for communication therebetween. Here, the positioning hole 413 can be set as a square hole, and one end of the positioning pin 42 can be set as a square shape to be inserted into the square hole. Since the protrusion 421 of the positioning pin 42 is restricted by the limiting rib 13 in the housing 1 and cannot rotate, when the positioning pin 42 is inserted into the positioning hole 413, the rotation of the emergency dial 41 can be restricted.

[0029] Combined with Figures 2 to 6 As shown, the emergency key 43 is adapted to match the lock core hole 412, and an unlocking portion 431 adapted to pass through the through hole is provided at its end to eject the positioning pin 42 out of the positioning hole 413 to release the rotation restriction of the positioning pin 42 on the emergency dial 41. The driving portion 411 is adapted to drive the lock hook 3 to rotate around the housing 1 when the emergency dial 41 rotates so that the hook portion 31 releases the lock catch 6. Specifically, a special-shaped hole is provided in the lock core hole 412, and the emergency key 43 is provided with a special-shaped column 432 matching the special-shaped hole. After the emergency key 43 is inserted, the unlocking portion 431 can pass through the through hole to eject the positioning pin 42 in the positioning hole 413, so that the positioning pin 42 cancels the rotation restriction on the emergency dial 41. The driving portion 411 includes a dial rib protruding from the outside of the emergency dial 41. A slope 4111 adapted to be in contact connection with the lock hook 3 is provided on the dial rib to drive one end of the lock hook 3 to rise along the slope 4111 during rotation, and then the hook portion 31 of the other end of the lock hook 3 releases the lock catch 6 to realize unlocking. Here, the slope 4111 can be set as an arc shape with a steep lower part and a gentle upper part to make the rotation smoother. A first elastic member 44 is provided at one end of the positioning pin 42 away from the emergency dial 41. The first elastic member 44 is adapted to provide a force towards the emergency dial 41 to the positioning pin 42, so that one end of the positioning pin 42 is inserted into the emergency dial 41 in the state where the emergency key 43 is not inserted to restrict the rotation of the emergency dial 41. When rotating the emergency dial 41, the dial rib drives the tail of the lock hook 3 to rotate upward and compresses the compression spring 22. At this time, the hook portion 31 can disengage from the lock catch 6 to unlock. After releasing the emergency key 43, the compression spring 22 on the electromagnet rod 21 will push the electromagnet rod 21 back to its original position to reset the lock hook 3. At this time, the positioning pin 42 spring will also push the positioning pin 42 back to its original position and insert it into the positioning hole 413 of the emergency dial 41.

[0030] Through the design of this solution, the emergency unlocking structure is simple and linked with the electromagnetic component 2, and can automatically reset after emergency unlocking. By arranging the spring piece 7 and the micro switch 8 at the hook portion 31 of the lock hook 3, the unlocking state and the locked state can be detected, and the unlocking can be assisted during unlocking to prevent unlocking failure, and mechanical unlocking can be achieved without power, which is used for emergency door opening.

[0031] It should be understood that the above are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0032] The above description of the drawings used in the implementation manner only shows certain embodiments of the utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

Claims

1. An electromagnetic lock with an emergency unlocking function, comprising a housing, characterized in that, Also includes: The electromagnetic component, the lock hook and the emergency component are arranged in the housing, wherein: The lock hook is hinged to the housing through a rotating shaft pin, and one end of the lock hook has a hook portion suitable for buckling the lock buckle, and the electromagnetic component is connected to the other end of the lock hook and is used to drive the lock hook to rotate around the rotating shaft pin, thereby controlling the hook portion to buckle or release the lock buckle; The emergency assembly includes an emergency paddle and a positioning pin, wherein the positioning pin is connected to the emergency paddle to limit the rotation of the emergency paddle, the emergency paddle is connected to the lock hook, and the emergency paddle has an emergency key matching it, and the emergency key is configured to release the rotation restriction of the emergency paddle by the positioning pin after the emergency paddle is inserted and to drive the emergency paddle to rotate to control the hook portion of the lock hook to release the lock buckle.

2. The electromagnetic lock with an emergency unlocking function according to claim 1, characterized in that, The locating pin is restricted in the shell to be suitable for sliding along the insertion direction of the emergency key, and the emergency paddle includes a driving part, a lock core hole and a locating hole suitable for connecting with one end of the locating pin, and a through hole is provided between the locating hole and the lock core hole to communicate with each other; one end of the locating pin is suitable for being inserted into the locating hole to limit the rotation of the emergency paddle; the emergency key is suitable for matching with the lock core hole, and an unlocking part suitable for passing through the through hole is provided at its end to push the locating pin out of the locating hole to release the rotation restriction of the locating pin on the emergency paddle; the driving part is suitable for driving the lock hook to rotate when the emergency paddle rotates so that the hook part releases the lock buckle.

3. The electromagnetic lock with an emergency unlocking function according to claim 2, wherein, The driving part includes a paddle rib protruding from the outside of the emergency paddle, and the paddle rib is provided with an inclined surface suitable for contacting and connecting with the lock hook to drive the lock hook to rise along the inclined surface when rotating, thereby controlling the hook part of the lock hook to release the lock buckle.

4. The electromagnetic lock with an emergency unlocking function according to claim 2, characterized in that, A first elastic member is provided at one end of the positioning pin away from the emergency paddle, and the first elastic member is suitable for providing a force on the positioning pin toward the emergency paddle so that one end of the positioning pin is inserted into the emergency paddle to limit the rotation of the emergency paddle when the emergency key is not inserted.

5. The electromagnetic lock with an emergency unlocking function according to claim 1, characterized in that, The shell is provided with an elastic sheet at a position close to the hook portion of the lock hook. The elastic sheet is suitable for being compressed by the lock buckle when the lock buckle is buckled into the lock hook, and can release elastic force to eject the lock buckle when the lock hook releases the lock buckle.

6. The electromagnetic lock with an emergency unlocking function according to claim 5, characterized in that, A micro switch is arranged on the peripheral side of the spring sheet, and the spring sheet is suitable for contacting the pressing piece of the micro switch when the lock buckle is buckled into the lock hook to put the micro switch in a connected state, and the spring sheet is suitable for releasing the pressing piece of the micro switch when the lock buckle is popped open to put the micro switch in a disconnected state.

7. The electromagnetic lock with an emergency unlocking function according to claim 1, characterized in that, The electromagnetic assembly includes an electromagnetic rod with a mounting hole and a compression spring arranged at one end of the mounting hole. The end of the lock hook away from the hook portion is suitable for being inserted into the mounting hole. The compression spring is suitable for extending the electromagnetic rod to drive the hook portion to be lifted to a locked position when the emergency key is not inserted; the electromagnetic assembly is suitable for controlling the contraction of the electromagnetic rod to pull the lock hook to rotate so that the hook portion descends to be in an unlocked position.

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