CN115807586A - Electromagnetic lock - Google Patents

Abstract

The utility model provides an electromagnetic lock, contains the card system unit that sets up in the door and include adsorption plate and an at least buckle, and set up in the door frame and including being used for adsorbing the electromagnetic means of adsorption plate, an at least locking device and an at least stop device's magnetic lock unit. The locking device comprises a lock catch with a locking part and an elastic element. When the door is in the door closing position, the adsorption plate faces the electromagnetic device, the lock catch blocks the locking state of the buckle at the lock catch part, and when the door is changed towards the door opening position, the buckle drives the lock catch to release the unlocking state of the buckle towards the lock catch part to change. The limiting device comprises a limiting stop and a driver, when the limiting stop is in a releasing state, the limiting stop does not limit the lock catch to be changed from the locking state to the unlocking state, and when the limiting stop is in a limiting state, the limiting stop limits the lock catch to be changed from the locking state to the unlocking state.

Description

Electromagnetic lock

Technical Field

The invention relates to a lock, in particular to an electromagnetic lock.

Background

As shown in fig. 1 and 2, a conventional electromechanical lock (chinese patent No. CN 1300435C) includes a latch assembly 1 disposed on a door frame 3, and a latch bolt 2 disposed on a door 4, wherein the latch assembly 1 includes a housing 5, an arm 6 disposed on the housing 5 in a manner of moving forward and backward, two latch members 7 pivotally disposed on the housing 5 in a manner of swinging, two compression springs 8 abutted between the housing 5 and the arm 6, and two compression springs 9 abutted between the housing 5 and the latch members 7. The bolt 2 has two projections 201, the arm 6 is movable between a first position (see fig. 1) and a second position (see fig. 2) and has two pins 601, each latch 7 is swingable between a release state (see fig. 1) and a lock state (see fig. 2) and has a hook 701 and an inclined surface 702.

Therefore, as shown in fig. 1, when the door is locked and no other external force is applied to the door 4, the arm 6 is pressed into the first position by the compression spring 8, the arm 6 can generate an electromagnetic attraction force to attract the bolt 2, and the pins 601 respectively block the inclined surfaces 702 of the latches 7 to place the latches 7 in the release state without catching the protrusions 201. Thereafter, when an external force (e.g. a manual force or a wind force) tries to pull or push the door 4, if the external force is less than or equal to the elastic restoring force of the compression spring 8, and the external force cannot drive the arm 6 to compress the compression spring 8, the arm 6 will not be driven to the second position (see fig. 2) via the latch 2 and the door 4, and the latch 7 will not swing to the locked state (see fig. 2), so that when the external force is substantially equal to the elastic restoring force of the compression spring 8, the magnitude of the external force at this time can be defined as an upper limit wind resistance, that is, the door 4 will not be pushed or pulled by the external force as long as the external force is less than the upper limit wind resistance.

As shown in fig. 2, when the external force is greater than the upper limit wind resistance, and the door 4 is pulled or pushed, since the electromagnetic attraction of the arm 6 is greater than the elastic restoring force of the compression spring 8 in terms of the inherent design, the arm 6 is driven to the second position via the latch 2 and the door 4 to compress the compression spring 8, at this time, the pins 601 respectively slide off the inclined surfaces 702 of the latches 7, and the compression spring 9 inwards pushes the latches 7 to the locked state, so that the hooks 701 of the latches 7 respectively hook the protrusions 201 of the latch 2, thereby preventing the door 4 from being further opened by the external force, and improving the safety.

However, in practical use, if the compression spring 8 is elastically exhausted after a period of time, and the elastic restoring force is reduced, the upper limit wind resistance is reduced, so that the arm 6 is easily moved to the second position by the smaller external force, and the door 4 is often accidentally opened by a seam; furthermore, since the electromagnetic attraction force (for example, 30 kg) of the arm 6 is greater than the elastic restoring force (for example, 29 kg) of the compression spring 8, the upper limit wind resistance is equal to the elastic restoring force of the compression spring 8, that is, the electromagnetic attraction force > the elastic restoring force of the compression spring 8 = the upper limit wind resistance, and therefore, the upper limit wind resistance (for example, 29 kg) is at most equal to the elastic restoring force of the compression spring 8 and cannot approach the electromagnetic attraction force of the arm 6. In addition, in the electromechanical lock, the latch member 7 is merely pushed to the locked state by the compression spring 9 to generate a mechanical locking effect, and when an external force (for example, a force of pulling left and right) applied to the latch member 7 is too large when someone tries to open the door violently, the latch member 7 may be forced to swing outward until the hook 701 of the latch member 7 is disengaged from the protrusion 201, so that an unexpected unlocking may occur.

Disclosure of Invention

It is an object of the present invention to provide an electromagnetic lock which overcomes at least one of the disadvantages of the prior art.

The electromagnetic lock is suitable for being installed on a door and a door frame, the door can be changed between a door opening position and a door closing position relative to the door frame, and the electromagnetic lock comprises a clamping unit and a magnetic lock unit.

The clamping unit is suitable for being arranged on the door and comprises an adsorption plate and at least one buckle, and the adsorption plate is provided with an adsorption plane.

The magnetic lock unit is suitable for being arranged on the door frame and comprises an electromagnetic device, at least one locking device corresponding to the buckle and at least one limiting device corresponding to the locking device.

The electromagnetic device is used for adsorbing the adsorption plate and is provided with a magnetic attraction plane, when the door is in the door closing position, the adsorption plate faces the electromagnetic device, and the magnetic attraction plane can be in mutual contact with the adsorption plane.

The lock catch device comprises a lock catch and an elastic element connected with the lock catch, the lock catch is provided with a lock catch portion, the lock catch can be changed between a locking state that the lock catch portion blocks the lock catch and an unlocking state that the lock catch portion releases the lock catch, when the door is at the door closing position, the lock catch is at the locking state, when the door is changed from the door closing position to the door opening position, the lock catch is driven to be changed from the locking state to the unlocking state by the lock catch, and the elastic element has potential energy for driving the lock catch to be changed from the unlocking state to the locking state.

The limiting device comprises a limiting block and a driver, wherein the limiting block can be changed between a release state and a limiting state, when the limiting block is in the release state, the limiting block does not limit the lock catch to be changed from the locking state to the unlocking state, when the limiting block is in the limiting state, the limiting block limits the lock catch to be changed from the locking state to the unlocking state, and the driver is used for driving the limiting block to be changed between the release state and the limiting state.

The electromagnetic lock comprises an electromagnetic device, a driver, a control device and a magnetic lock unit, wherein the electromagnetic device is electrically connected with the electromagnetic device and the driver, the control device is used for controlling whether the electromagnetic device generates electromagnetic suction force or not and driving the driver or not, when the door is in the door closing position, the control device controls the electromagnetic device to generate the electromagnetic suction force to enable the magnetic suction plane to suck the adsorption plane of the adsorption plate, controls the driver to drive the limit stop block to change from the release state to the limit state to lock the door, and when the door is to be changed from the door closing position to the door opening position, the control device controls the driver to drive the limit stop block to change from the limit state to the release state, and controls the electromagnetic device to stop generating the electromagnetic suction force to enable the electromagnetic device to release the adsorption plate to unlock the door.

According to the electromagnetic lock, the magnetic lock unit further comprises a shell suitable for being arranged on the door frame, the electromagnetic device is arranged on the shell, the locking device is arranged on the shell, the limiting device is arranged on the shell, and the control device is arranged on the shell.

The electromagnetic lock is characterized in that the lock catch is also provided with a pivoting part and a clamping part, the pivoting part is pivoted on the shell, the elastic element is abutted between the lock catch and the shell, the pivoting part is arranged between the lock catch part and the clamping part, when the limit stop is in the release state, the limit stop does not limit the clamping part of the lock catch, and when the limit stop is in the limiting state, the limit stop limits the clamping part of the lock catch.

The shell of the electromagnetic lock is provided with at least one first long round hole extending along the transverse direction and at least one second long round hole opposite to the first long round hole, the limit stop block is provided with a limit part, a pivoting part connected with the first long round hole and the second long round hole in a sliding mode, and a driven part arranged between the limit part and the pivoting part, the driver is provided with a valve body, a valve rod arranged on the valve body in a telescopic mode along the transverse direction and connected with the driven part, and a return spring arranged between the valve rod and the valve body, the return spring is provided with potential energy for driving the valve rod to extend outwards along the transverse direction, when the limit stop block is in a release state, the limit part of the limit stop block does not block the clamping part of the lock catch, and when the limit stop block is in a limit state, the limit part of the limit stop block blocks the clamping part of the lock catch.

In the electromagnetic lock according to the present invention, when the lock catch is in the locked state and the limit stopper is in the restricted state, the limit portion of the limit stopper is located between the electromagnetic device and the engagement portion of the lock catch in the lateral direction, and the engagement portion of the lock catch is located between the limit portion of the limit stopper and the pivot portion in the lateral direction.

In the electromagnetic lock of the present invention, the locking unit includes two buckles disposed at both ends of the adsorption plate at intervals in the transverse direction, the adsorption plane is disposed between the buckles in the transverse direction, the magnetic lock unit includes two locking devices respectively corresponding to the buckles, and two limiting devices respectively corresponding to the locking devices, the locking devices are disposed at the housing at intervals in the transverse direction, the limiting devices are disposed at the housing at intervals in the transverse direction, and the electromagnetic device is disposed between the locking devices in the transverse direction, and between the limiting stoppers of the limiting devices.

The electromagnetic device comprises an electromagnetic body and a coil wound on the electromagnetic body, the electromagnetic body is provided with the magnetic attraction plane, the control device comprises a circuit board module arranged on the electromagnetic body and a trigger module arranged on the electromagnetic body, the circuit board module is electrically connected with the electromagnetic device and the driver, when the door is in the door closing position, the adsorption plate touches and presses the trigger module, the trigger module can enable the circuit board module to control the electromagnetic device to generate electromagnetic attraction, so that the magnetic attraction plane attracts and holds the adsorption plane of the adsorption plate, the circuit board module can be enabled to control the driver to drive the limit stop block to be converted from the release state to the limit state so as to lock the door, when the door is to be converted from the door closing position to the door opening position, the circuit board module controls the driver to drive the limit stop block to be converted from the limit state to the release state, and the circuit board module controls the electromagnetic device to stop generating electromagnetic attraction, so that the electromagnetic device releases the adsorption plate, and unlocks the door.

The invention has the beneficial effects that: in the present invention, when the door is in the door closing position, the electromagnetic attraction of the electromagnetic device is directly utilized to attract the adsorption plate, and when an external force (for example, manual force or wind force) tries to pull or push the door, as long as the external force is less than or equal to the electromagnetic attraction of the electromagnetic device, the external force cannot pull the adsorption plate away from the electromagnetic device, so that the upper limit wind resistance of the present invention is substantially equal to the electromagnetic attraction of the electromagnetic device. In addition, the design that the limiting device is matched with the locking device is utilized, when the door is in the door closing position, the driver of the limiting device can actively drive the limiting stop block to swing to the limiting state so as to limit the locking of the locking device to the locking state and further lock the door, and as the problem of elastic fatigue of the driver of the limiting device cannot occur and the electromagnetic device can generate stable electromagnetic suction on the adsorption plate, the problem of upper limit wind resistance reduction in the prior art cannot occur after the door is used for a period of time.

Drawings

FIG. 1 is a fragmentary top plan schematic view of a prior art electromechanical lock illustrating an arm of the electromechanical lock in a first position and two latching members of the electromechanical lock in a released condition;

FIG. 2 is a view similar to FIG. 1, illustrating the arm in a second position with the latch in a locked condition;

FIG. 3 is a partial exploded perspective view of one embodiment of the electromagnetic lock of the present invention;

FIG. 4 is an exploded perspective view of the embodiment;

fig. 5 is a sectional view of the embodiment illustrating a latch unit of the embodiment mounted on a door and a magnetic lock unit of the embodiment mounted on a door frame;

FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5;

FIG. 7 is a perspective view of one of the two lockers of the magnetic lock unit;

FIG. 8 is a partial exploded perspective view illustrating two position limiting devices of the magnetic lock unit;

FIG. 9 is a view similar to FIG. 5, illustrating the door with the latch unit moved to the point where the two latches of the latch unit are in latching contact with the latches of the latching device, with a trigger pin of a trigger module of a control device of the magnetic lock unit in an unactuated position;

FIG. 10 is a view similar to FIG. 9 illustrating the latch urging the latch of the locker from a locked state to an unlocked state;

FIG. 11 is a view similar to FIG. 10, illustrating the door in a closed door position, the striker of the striker device being returned to the latched condition, the limit stop of the limiting device being swung to a limit condition, and the trigger pin being in a trigger position;

FIG. 12 is a view similar to FIG. 11 illustrating the bump stop of the spacing device swung to a released condition;

FIG. 13 is a view similar to FIG. 12, illustrating the door moving with the latch unit to the catch urging the shackle of the locker from the locked condition to the unlocked condition;

FIG. 14 is a view similar to FIG. 13 showing the door in an open door position with the latch unit being moved to release the catch from the locker and the locker being reset to the locked position;

FIG. 15 is a view similar to FIG. 11, illustrating the door being pulled open by an external force, the latch actuating the latch of the latch mechanism to push the positive stop of the check device inwardly to be stopped by an electromagnetic body of an electromagnetic device of the magnetic lock unit;

figure 16 is a cross-sectional view taken along line xvi-xvi in figure 15.

Detailed Description

The present invention will be described in detail below with reference to the drawings and examples.

Referring to fig. 3, 4 and 5, an embodiment of the electromagnetic lock 100 according to the present invention is adapted to be installed on a door 200 and a door frame 300, the door 200 can be switched between an open position (see fig. 5) and a closed position (see fig. 11) relative to the door frame 300, and the electromagnetic lock 100 includes a locking unit 10 and a magnetic lock unit 20.

The locking unit 10 is adapted to be disposed on the door 200, and includes an absorption plate 11 and two locking buckles 12 disposed at two ends of the absorption plate 11 at intervals in a horizontal direction X, the absorption plate 11 has an absorption plane 111, and the absorption plane 111 is disposed between the locking buckles 12 in the horizontal direction X. It is understood that, in other variations of the present embodiment, the number of the buckles 12 may be one.

As shown in fig. 4, 5, and 6, the magnetic lock unit 20 is adapted to be disposed on the door frame 300, and includes a housing 30 adapted to be disposed on the door frame 300, a protective casing 40 covering the housing 30 and having a U-shaped cross section, an electromagnetic device 50, two locking devices 60 respectively corresponding to the fasteners 12, two limiting devices 70 respectively corresponding to the locking devices 60, and a control device 80. It is understood that, in other variations of the present embodiment, the number of the locking device 60 and the limiting device 70 may also be one.

In the present embodiment, the housing 30 has two end walls 31 disposed opposite to each other in the transverse direction X, a first side wall 32 extending along the transverse direction X and locked to the end walls 31, and a second side wall 33 opposing to the first side wall 32 in a height direction Z and locked to the end walls 31.

The first side wall 32 has two first oblong holes 321 extending along the transverse direction X and spaced apart from each other in the transverse direction X.

The second side wall 33 has two second oblong holes 331 extending along the transverse direction X and spaced apart from each other in the transverse direction X, and the second oblong holes 331 are respectively opposite to the first oblong holes 321. It is understood that, in other variations of the present embodiment, the number of the first oblong holes 321 and the second oblong holes 331 may also be one.

The electromagnetic device 50 is disposed on the housing 30 and used for adsorbing the adsorption plate 11, and the electromagnetic device 50 includes an electromagnetic body 51 and a coil 52 wound around the electromagnetic body 51. The electromagnetic body 51 has a magnetic attraction plane 511.

As shown in fig. 11, when the door 200 is in the closed position, the suction plate 11 faces the electromagnetic device 50, and the suction plane 511 and the suction plane 111 can contact each other.

As shown in fig. 4, 5 and 6, the locking devices 60 are disposed at intervals on the housing 30 in the transverse direction X, and each locking device 60 includes a lock 61 and an elastic element 62 connected to the lock 61.

As shown in fig. 5 and 7, the latch 61 further has a latching portion 611, a pivoting portion 612 pivotally disposed on the housing 30, and a locking portion 613, wherein the pivoting portion 612 is disposed between the latching portion 611 and the locking portion 613.

The lock 61 of each locking device 60 is changeable between a locked state (see fig. 11) in which the locking portion 611 blocks the respective catch 12 and an unlocked state (see fig. 10) in which the locking portion 611 releases the respective catch 12.

As shown in fig. 11, when the door 200 is in the closed door position, the shackle 61 is in the locked state. As shown in fig. 12, 13 and 14, when the door 200 is shifted from the door-closing position (see fig. 12) to the door-opening position (see fig. 14), each latch 12 drives the latch 61 of the respective latch device 60 to shift from the locked state (see fig. 12) to the unlocked state (see fig. 13), and the elastic element 62 has a potential energy driving the latch 61 to shift from the unlocked state (see fig. 13) to the locked state (see fig. 14).

As shown in fig. 5, 6 and 8, the position-limiting devices 70 are disposed on the housing 30 at intervals in the transverse direction X, each position-limiting device 70 includes a position-limiting stopper 71 and an actuator 72, in this embodiment, the electromagnetic device 50 is disposed between the locking devices 60 and between the position-limiting stoppers 71 of the position-limiting devices 70 in the transverse direction X.

The limit stop 71 can be changed between a releasing state (as shown in fig. 9) and a limiting state (as shown in fig. 11), and the limit stop 71 has a limiting portion 711, a pivoting portion 712, and a driven portion 713 disposed between the limiting portion 711 and the pivoting portion 712.

The pivot portion 712 is slidably connected to one of the first elongated holes 321 and one of the second elongated holes 331 of the first side wall 32 and the second side wall 33, and in the present embodiment, it can be understood that the pivot portion 712 can rotate relative to the corresponding one of the first elongated holes 321 and one of the second elongated holes 331, and in addition, the pivot portion 712 can also move along the transverse direction X relative to the corresponding one of the first elongated holes 321 and one of the second elongated holes 331.

In the present embodiment, the driven portion 713 has two caulking grooves 714 (see fig. 8) provided at intervals in the height direction Z.

The actuator 72 is used to actuate the positive stop 71 between the released state (shown in FIG. 9) and the restrained state (shown in FIG. 11).

The actuator 72 includes a valve body 721, a valve rod 722 telescopically disposed in the valve body 721 along the transverse direction X and connected to the driven portion 713, and a return spring 723 disposed between the valve rod 722 and the valve body 721, wherein the return spring 723 has a potential energy for driving the valve rod 722 to extend outward along the transverse direction X. In this embodiment, the actuator 72 is a solenoid valve.

In this embodiment, the actuator 72 of one of the position-limiting devices 70 is fixed to the first side wall 32, the stem 722 of the actuator 72 of one of the position-limiting devices 70 is slidably engaged with the upper one of the slots 714 of the driven portion 713 of the position-limiting stopper 71 of the one of the position-limiting devices 70, the actuator 72 of the other position-limiting device 70 is fixed to the second side wall 33, and the stem 722 of the actuator 72 of the other position-limiting device 70 is slidably engaged with the lower one of the slots 714 of the driven portion 713 of the position-limiting stopper 71 of the other position-limiting device 70.

As shown in fig. 12, when the limit stopper 71 is in the release state, the limit stopper 71 does not limit the locking portion 613 of the shackle 61, and further, the limit portion 711 of the limit stopper 71 does not prevent the locking portion 613 of the shackle 61 from swinging inward, so that the limit stopper 71 does not limit the shackle 61 from the locked state (see fig. 12) to the unlocked state (see fig. 13).

As shown in fig. 11, when the limit stopper 71 is in the limiting state, the limit stopper 71 limits the locking portion 613 of the latch 61, and further, the limit portion 711 of the limit stopper 71 blocks the locking portion 613 of the latch 61 from swinging inward, so that the limit stopper 71 limits the latch 61 from the locking state (see fig. 11) to the unlocking state (see fig. 13).

As shown in fig. 11, when the latch 61 is in the locked state and the limit stop 71 is in the restricted state, the limit portion 711 of the limit stop 71 is located between the electromagnetic body 51 of the electromagnetic device 50 and the engaging portion 613 of the latch 61 in the transverse direction X, and the engaging portion 613 of the latch 61 is located between the limit portion 711 of the limit stop 71 and the pivot portion 712 in the transverse direction X.

As shown in fig. 4 and 5, the control device 80 is disposed on the housing 30, and the control device 80 is electrically connected to the electromagnetic device 50 and the driver 72, and is used for controlling whether the electromagnetic device 50 generates electromagnetic attraction and controlling whether the driver 72 is driven.

The control device 80 includes a circuit board module 81 disposed on the electromagnetic body 51, and a trigger module 82 disposed on the electromagnetic body 51. The circuit board module 81 is electrically connected to the electromagnetic device 50 and the driver 72.

Thereby, as shown in fig. 9 and 10, when the user closes the door 200 from the door opening position (see fig. 5) to the door closing position (see fig. 11), each latch 12 of the locking unit 10 will first contact the latching portion 611 of the latch 61 of the respective latching device 60, and then each latch 12 will push the latching portion 611 of the latch 61 of the respective latching device 60 outwards, so that the latch 61 of the respective latching device 60 swings from the locked state (see fig. 9) to the unlocked state (see fig. 10); as shown in fig. 10 and 11, when the door 200 moves to the door closing position, each latch 12 slides inward along the longitudinal direction Y over the latching portion 611 of the latch 61 of the respective latching device 60, at this time, the elastic restoring force of the elastic element 62 of each latching device 60 pushes the latch 61 of each latching device 60 from the unlocked state (see fig. 10) to the locked state (see fig. 11), so that the latching portion 611 of the latch 61 of each latching device 60 blocks the outer side of the respective latch 12 to limit the door 200 from driving the latching unit 10 to move outward, at the same time, the suction plane 111 of the suction plate 11 contacts the magnetic suction plane 511 of the electromagnetic body 51, the suction plane 111 of the suction plate 11 contacts and presses the trigger module 82, so that the trigger module 82 of the control device 80 causes the electromagnetic device 50 to generate an electromagnetic suction force, so that the suction plane 511 of the electromagnetic body 51 sucks the suction plane 111 of the suction plate 11, the control device 80 causes the electromagnetic device 81 to control the electromagnetic device 50 to generate an electromagnetic suction force, and further causes the control device 70 to release the swing limit device 70 from the electromagnetic device 70 (see fig. 70) to control the limit the state of each latching device 70 to release the door 70, and then to control the limit the state of each latching device 70 (see fig. 70). It is understood that the triggering module 82 can trigger a magnetic induction element 811 (such as a hall element) on the circuit board module 81 by using a magnetic element 821, but not limited thereto. On the contrary, as shown in fig. 12, fig. 13 and fig. 14, when a user wants to open the door 200 from the door closing position (see fig. 12) to the door opening position (see fig. 14), the control signal is transmitted to the circuit board module 81 of the control device 80 by a switch (not shown) or a remote controller (not shown) electrically connected to the circuit board module 81 of the control device 80, so that the circuit board module 81 of the control device 80 controls the driver 72 of each position limiting device 70 to drive the position limiting stopper 71 of each position limiting device 70 to swing from the limiting state (see fig. 11) to the releasing state (see fig. 12) so as to no longer limit the latch 61 of the respective latch device 60, and the circuit board module 81 of the control device 80 controls the electromagnetic device 50 to stop generating the electromagnetic attraction force, so that the electromagnetic device 50 releases the attraction plate 11 to unlock the door 200, preferably, the circuit board module 81 of the control device 80 controls the driver 72 to swing the position limiting stopper 71 of each position limiting device 70 to the releasing state, and then controls the electromagnetic device 50 to stop generating the electromagnetic attraction force.

Thus, during the process of opening the door 200 from the door-closing position (see fig. 12) to the door-opening position (see fig. 14), as shown in fig. 12 and 13, each buckle 12 of the locking unit 10 first contacts with the latching portion 611 of the latch 61 of the respective locker 60, and then, each buckle 12 pushes the latching portion 611 of the latch 61 of the respective locker 60 outwards, so that the latch 61 of the respective locker 60 swings from the locked state (see fig. 12) to the unlocked state (see fig. 13), and thereafter, as shown in fig. 14, after each buckle 12 slides outwards along the longitudinal direction Y over the latching portion 611 of the latch 61 of the respective locker 60, the elastic restoring force of the elastic element 62 of each locker 60 pushes the latch 61 of each locker 60 back from the unlocked state (see fig. 13) to the locked state (see fig. 14) to wait for the next door closing.

Furthermore, as shown in fig. 15 and 16, after the door 200 is locked, if an outsider opens the door violently and pulls the door 200 outward until the absorption plate 11 is separated from the electromagnetic body 51, at this time, since the limiting portion 711 of the limiting stopper 71 of each limiting device 70 is between the electromagnetic body 51 of the electromagnetic device 50 and the locking portion 613 of the locking buckle 61 of the respective locking device 60 in the transverse direction X, and the pivot portion 712 of the limiting stopper 71 of each limiting device 70 is slidably connected to the first elongated hole 321 and the second elongated hole 331 of the first side wall 32 and the second side wall 33 corresponding thereto, when the door 200 carries each buckle 12 to push the locking portion 611 of the locking buckle 61 of the respective locking device 60 outward, and forces the locking portion 613 of the locking buckle 61 of the respective locking device 60 to swing inward, the locking portion 61 of the respective locking device 60 can only push the respective limiting stopper 71 of the limiting device 70 inward against the respective locking buckle 71 of the limiting device 70, and each limiting device 71 can not be pulled inward by the limiting device 70, and each limiting stopper 71 can be further pushed by the limiting device 70 along the transverse direction X, and each limiting device 70 can be prevented from being pulled inward by the hard force of the respective limiting device 70.

From the above description, the advantages of the present invention can be summarized as follows:

1. in the present invention, when the door 200 is at the door closing position, the electromagnetic attraction of the electromagnetic device 50 is directly utilized to suck the adsorption plate 11, and when an external force (e.g. human power or wind power) tries to pull or push the door 200, as long as the external force is less than or equal to the electromagnetic attraction of the electromagnetic device 50, the external force cannot pull the adsorption plate 11 away from the electromagnetic device 50 through the door 200, so the upper limit wind resistance of the present invention is substantially equal to the electromagnetic attraction of the electromagnetic device 50, compared to the prior art, since the upper limit wind resistance of the present invention is substantially equal to the electromagnetic attraction of the electromagnetic device 50, the upper limit wind resistance of the present invention (e.g. 30 kg weight) is greater than the upper limit wind resistance of the prior art under the same electromagnetic attraction (e.g. 30 kg weight), so that the door 200 is less likely to be pulled away by the external force or a seam relative to the door frame 300.

2. According to the design of the position-limiting device 70 and the locking devices 60, when the door 200 is at the door-closing position and the lock catch 61 of each locking device 60 swings to the locking state, the driver 72 of each position-limiting device 70 drives the limit stop 71 of each position-limiting device 70 to swing to the limiting state, so as to actively limit the lock catch 61 of the corresponding locking device 60 to the locking state, and further lock the door 200, compared with the prior art in which the latch 7 is passively locked after the external force overcomes the elastic restoring force of the compression spring 8, the problem of elastic fatigue of the compression spring 8 in the prior art cannot occur due to the fact that the driver 72 of the position-limiting device 70 is an electromagnetic valve, and the electromagnetic device 50 can generate stable electromagnetic attraction force on the adsorption plate 11, and therefore, after the door is used for a period of time, the problem of wind resistance reduction in the prior art cannot occur.

3. Compared with the prior art, after the door 200 is locked, the invention utilizes the design that the limiting part 711 of the limiting stopper 71 of each limiting device 70 is arranged between the electromagnetic body 51 of the electromagnetic device 50 and the clamping part 613 of the lock catch 61 of the respective locking device 60 in the transverse direction X, and the pivot part 712 of the limiting stopper 71 of each limiting device 70 is slidably connected with the first long hole 321 of the first side wall 32 and the second long hole 331 of the second side wall 33, so that when an outsider tries to open the door violently, the limiting stopper 71 of each limiting device 70 in the limiting state can only slide inwards in the transverse direction X in a limited way by blocking the limiting part 711 of the limiting stopper 71 of each limiting device 70 by the electromagnetic body 51, and thus, the limiting stopper 71 of each limiting device 70 and the driver 72 can be effectively prevented from being pulled apart by an external force to the unlocking device, an accidental unlocking situation can be avoided, and the limiting stopper 71 of each limiting device 70 and the driver 72 can be prevented from being damaged by the external force, so that the design of the limiting stopper 71 of each limiting device 70 can be light and the driver can be reduced in weight, and the size of the limiting device 70 can be reduced.

4. Before the door 200 is locked or unlocked, the control device 80 controls the electromagnetic device 50 to suck the absorption plate 11, so as to prevent the door from being driven by an external force (such as wind force) to drive the absorption plate 11, so that the buckles 12 at the two ends of the absorption plate 11 do not drive the buckles 61 of the buckle device 60 to clamp the limit stop 71 of the limit device 70 by mistake, and ensure that the limit stop 71 of the limit device 70 can be smoothly switched between the release state and the limit state, and further ensure that the buckles 61 of the buckle device 60 can be normally limited or released by the limit stop 71 of the limit device 70, so as to smoothly lock or unlock the door 200.

In summary, the electromagnetic lock of the present invention can effectively improve the security of the door, so the object of the present invention can be achieved.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.

Claims (8)

1. An electromagnetic lock, is suitable for and installs in door and door frame, the door can for the door frame alternate between door opening position and closed door position, the electromagnetic lock contains the card system unit, and magnetic lock unit, its characterized in that:

the clamping unit is suitable for being arranged on the door and comprises an adsorption plate and at least one buckle, and the adsorption plate is provided with an adsorption plane; and

the magnetic lock unit is suitable for being arranged on the door frame and comprises an electromagnetic device, at least one locking device corresponding to the buckle and at least one limiting device corresponding to the locking device,

the electromagnetic device is used for adsorbing the adsorption plate and is provided with a magnetic adsorption plane, when the door is in the door closing position, the adsorption plate faces the electromagnetic device, the magnetic adsorption plane can be contacted with the adsorption plane,

the lock catch device comprises a lock catch and an elastic element connected with the lock catch, the lock catch is provided with a lock catch part, the lock catch can be changed between a locking state that the lock catch part blocks the lock catch and an unlocking state that the lock catch part releases the lock catch, when the door is at the door closing position, the lock catch is at the locking state, when the door is changed from the door closing position to the door opening position, the lock catch is driven to be changed from the locking state to the unlocking state by the lock catch, and the elastic element has potential energy for driving the lock catch to be changed from the unlocking state to the locking state,

the limiting device comprises a limiting stop and a driver, the limiting stop can be changed between a release state and a limiting state, when the limiting stop is in the release state, the limiting stop does not limit the lock catch to be changed from the locking state to the unlocking state, when the limiting stop is in the limiting state, the limiting stop limits the lock catch to be changed from the locking state to the unlocking state, and the driver is used for driving the limiting stop to be changed between the release state and the limiting state.

2. An electromagnetic lock according to claim 1, wherein: the magnetic lock unit further comprises a control device, wherein the control device is electrically connected to the electromagnetic device and the driver and used for controlling whether the electromagnetic device generates electromagnetic suction and controlling whether the driver is driven, when the door is in the door closing position, the control device controls the electromagnetic device to generate electromagnetic suction so that the magnetic suction plane sucks the suction plane of the suction plate, the control device controls the driver to drive the limit stop to change from the release state to the limit state so as to lock the door, when the door is to change from the door closing position to the door opening position, the control device controls the driver to drive the limit stop to change from the limit state to the release state, and the control device controls the electromagnetic device to stop generating electromagnetic suction so that the electromagnetic device releases the suction plate so as to unlock the door.

3. An electromagnetic lock according to claim 2, wherein: the magnetic lock unit further comprises a shell suitable for being arranged on the door frame, the electromagnetic device is arranged on the shell, the locking device is arranged on the shell, the limiting device is arranged on the shell, and the control device is arranged on the shell.

4. An electromagnetic lock as claimed in claim 3, wherein: the lock catch is also provided with a pivoting part and a clamping part, the pivoting part is pivoted on the shell, the elastic element is abutted between the lock catch and the shell, the pivoting part is arranged between the lock catch part and the clamping part, when the limit stop is in the release state, the limit stop does not limit the clamping part of the lock catch, and when the limit stop is in the limiting state, the limit stop limits the clamping part of the lock catch.

5. An electromagnetic lock according to claim 4, wherein: the shell is provided with at least one first long round hole extending along the transverse direction and at least one second long round hole opposite to the first long round hole, the limit stop is provided with a limit part, a pin joint part in sliding connection with the first long round hole and the second long round hole, and a driven part between the limit part and the pin joint part, the driver is provided with a valve body, a valve rod which is telescopically arranged on the valve body along the transverse direction and is connected with the driven part, and a return spring arranged between the valve rod and the valve body, the return spring is provided with potential energy for driving the valve rod to extend outwards along the transverse direction, when the limit stop is in the release state, the limit part of the limit stop does not block the clamping part of the lock catch, and when the limit stop is in the limit state, the limit part of the limit stop blocks the clamping part of the lock catch.

6. An electromagnetic lock according to claim 5, wherein: when the lock catch is in the locked state and the limit stop is in the limiting state, the limit part of the limit stop is located between the electromagnetic device and the clamping part of the lock catch in the transverse direction, and the clamping part of the lock catch is located between the limit part of the limit stop and the pivot part in the transverse direction.

7. An electromagnetic lock as claimed in claim 3, wherein: the clamping unit comprises two buckles arranged at two ends of the adsorption plate at intervals in the transverse direction, the adsorption plane is arranged between the buckles in the transverse direction, the magnetic lock unit comprises two locking devices respectively corresponding to the buckles and two limiting devices respectively corresponding to the locking devices, the locking devices are arranged on the shell at intervals in the transverse direction, the limiting devices are arranged on the shell at intervals in the transverse direction, and the electromagnetic devices are arranged between the locking devices and between limiting stops of the limiting devices in the transverse direction.

8. An electromagnetic lock according to claim 3, wherein: the electromagnetic device comprises an electromagnetic body and a coil wound on the electromagnetic body, the electromagnetic body is provided with the magnetic attraction plane, the control device comprises a circuit board module arranged on the electromagnetic body and a trigger module arranged on the electromagnetic body, the circuit board module is electrically connected with the electromagnetic device and the driver, when the door is in the door closing position, the adsorption plate is in contact with the trigger module, the trigger module can enable the circuit board module to control the electromagnetic device to generate electromagnetic attraction force, so that the magnetic attraction plane attracts the adsorption plane of the adsorption plate, the circuit board module can be enabled to control the driver to drive the limit stop block to change from the release state to the limit state so as to lock the door, when the door is to be changed from the door closing position to the door opening position, the circuit board module controls the driver to drive the limit stop block to change from the limit state to the release state, and the circuit board module controls the electromagnetic device to stop generating electromagnetic attraction force, so that the electromagnetic device releases the adsorption plate, and unlocks the door.

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