Fire door push rod lock and control method thereof

Abstract

The present disclosure relates to a push rod lock for a fire door and a control method thereof. The push rod lock comprises: a housing; a lock tongue; a toggle plate; a push rod; an electromagnetic telescopic assembly having a sliding pressure block that can be extended or retracted by electromagnetic control; a lock latch rotating assembly, the lock latch rotating assembly being used to unlock the door by a key; a first sensing element corresponding to the rotating block; a second sensing element corresponding to the lock tongue; a third sensing element corresponding to the push rod; a verification device; a prompting device; a controller, the input end of which is respectively connected to the first sensing element, the second sensing element, the third sensing element and the verification device signal, and the output end is respectively connected to the electromagnetic telescopic assembly and the prompting device signal. The control method is applied to the above-mentioned push rod lock. The present disclosure can realize the management of personnel entry and exit, and has multiple status detection and prompting functions, which can meet the usage needs of various types of users, and at the same time has the advantages of low energy consumption, low heat generation, long service life and high reliability.

Description

Technical Field

[0001] The present disclosure relates to the technical field of push rod locks, and in particular to a fire door push rod lock and a control method thereof. Background Art

[0002] A fire door push rod lock, also known as an escape push rod lock, is a lock installed on emergency escape doors in public places such as supermarkets and shopping malls. It can prevent outsiders from entering from the outside without permission, and also allow insiders to quickly unlock and escape in an emergency. The existing push rod lock structure mainly includes a push rod, a transmission mechanism, and a lock cylinder. For example, the escape push rod lock disclosed in patent CN209228220U includes a lock cylinder assembly, a push rod, and a transmission mechanism connecting the lock cylinder assembly and the push rod. The transmission mechanism converts the downward movement of the push rod into a telescopic movement for operating the lock cylinder assembly. The transmission mechanism includes a connecting rod connected to the lock cylinder assembly, at least two drive assemblies connecting the connecting rod and the push rod, and the drive assembly includes a support base and a linkage member rotatably mounted on the support base. One end of the linkage member is rotatably connected to the push rod, and the other end of the linkage member is rotatably connected to the connecting rod. When the push rod is pressed down, the linkage member can drive the connecting rod to move, thereby driving the lock cylinder assembly to move.

[0003] The push rod lock of the above mechanical structure can only prevent outsiders from entering, and cannot manage the entry and exit of internal personnel. On the other hand, the existing push rod lock has the defect of single function and difficulty in meeting the needs of various types of users, which needs to be improved. Summary of the Invention

[0004] To address the aforementioned problems of the prior art, the present invention provides a fire door push rod lock and a control method thereof. The present invention can manage the entry and exit of personnel, and has multiple status detection and prompt functions to meet the needs of various types of users. It also has the advantages of low energy consumption, low heat generation, long service life, and high reliability.

[0005] A fire door push rod lock disclosed in the present disclosure comprises:

[0006] shell;

[0007] A lock tongue is rotatably disposed at one end of the housing, and the lock tongue can be rotated to be partially exposed outside the housing or retracted into the housing;

[0008] A toggle plate, one of which is rotatably connected to the housing, and one end of the toggle plate is a toggle end, the toggle end abuts against the lock tongue and is used to toggle the lock tongue to rotate to a retracted state, and the other end is a pushing end;

[0009] A push rod is slidably connected to the housing so that the push rod can slide in a direction close to the housing, and a position of the push rod close to the pushing end extends toward the housing to form a pushing portion;

[0010] an electromagnetic telescopic assembly disposed on the pushing end, the electromagnetic telescopic assembly comprising a sliding pressure block that can be extended or retracted by electromagnetic control, wherein the sliding pressure block at least partially enters the sliding stroke of the pushing portion in an extended state and is out of the sliding stroke of the pushing portion in a retracted state;

[0011] A lock latch rotating assembly is provided between the toggle end and the bottom surface of the housing, the lock latch rotating assembly comprising a rotating block and a driving plate, the rotating block being rotatably connected to the housing and having a lock hole for inserting a key, one side of the driving plate abutting the rotating block and the other side connected to the toggle end, when the rotating block rotates to an unlocked position, the rotating block pushes the toggle end through the driving plate, toggling the lock tongue to retract;

[0012] a first sensing element, which is provided corresponding to the rotating block and is used to sense the position of the rotating block;

[0013] a second sensing element, which is provided corresponding to the lock tongue and is used to sense the position of the lock tongue;

[0014] a third sensing element, which is provided corresponding to the push rod and is used to sense the position of the push rod;

[0015] a verification device for performing identity verification;

[0016] a prompting device for playing an audible prompt and / or a light prompt;

[0017] The controller has an input end respectively connected to the first sensing element, the second sensing element, the third sensing element and the verification device signal, and an output end respectively connected to the electromagnetic telescopic component and the prompt device signal.

[0018] Preferably, the electromagnetic telescopic assembly includes:

[0019] The mounting frame is provided on the pushing end; the middle portion of the sliding pressure block extends to form a sliding rod, the mounting frame is formed with a sliding hole adapted to the sliding rod, the sliding rod is slidably sleeved in the sliding hole, so that the sliding pressure block is slidably connected to the mounting frame;

[0020] An electromagnet is provided on the mounting frame; the sliding pressing block is made of a magnetically attractive material, is slidably connected to the mounting frame and corresponds to the electromagnet;

[0021] An elastic reset member has one end connected to the sliding pressing block and the other end connected to the mounting bracket. The elastic reset member is configured to enable the sliding pressing block to have a movement tendency to extend outward.

[0022] Preferably, the pushing portion is a rectangular block extending along the length direction of the push rod, the interior of the pushing portion is hollow, and both ends of the bottom surface thereof are arc transitions;

[0023] A pressing groove is formed on one side edge of the sliding pressing block close to the pushing portion at a position corresponding to the pushing portion, and the groove width of the pressing groove is adapted to the width of the pushing portion.

[0024] Preferably, an upwardly protruding abutting portion is formed on a surface of the rotating block facing the driving plate;

[0025] The driving plate is in a V-shape, one side edge of which is in contact with and connected to the dial end, and the other side edge of which is in contact with the abutment portion at an angle;

[0026] The length of the abutting portion is smaller than the length of the driving plate, so that when the rotating block is locked, both ends of the driving plate are exposed outside both ends of the abutting portion.

[0027] Preferably, the first sensing element is arranged on a side of the rotating block away from the lock tongue, and a sensing groove is formed at a position corresponding to the first sensing element when the rotating block is in a locked state;

[0028] The lock tongue is coaxially connected to a synchronization plate, which is adapted to the shape of the lock tongue and is correspondingly arranged so that the synchronization plate and the lock tongue rotate synchronously; the second sensing element is arranged beside the synchronization plate when the lock tongue is retracted, and is used to sense the position of the synchronization plate;

[0029] The third sensing element is arranged beside the end of the sliding stroke of the push rod, and the third sensing element is extended to form a sensing plate extending into the end of the sliding stroke of the push rod.

[0030] Preferably, one end of the lock tongue close to the toggle plate extends toward the toggle plate to form a toggle portion for abutting against the toggle plate, a surface of the toggle portion facing the toggle plate is an arc surface, and a thickness of the toggle portion gradually decreases in a direction close to the toggle plate, forming an arc-shaped angle structure at the end;

[0031] A pop-up spring is provided at the rotation connection position between the lock tongue and the shell, and the pop-up spring is configured to enable the lock tongue to have a movement tendency of rotating to be exposed outside the shell.

[0032] Preferably, the prompting device includes a speaker and a prompting light.

[0033] Preferably, the fire door push rod lock further comprises:

[0034] The infrared sensor is arranged on the outer surface of the shell and is connected to the input terminal signal of the controller.

[0035] Preferably, the fire door push rod lock further comprises:

[0036] The communication module is connected to the controller signal and is used for external communication.

[0037] A control method for a fire door push rod lock disclosed herein is applied to the fire door push rod lock as described above, and the control method includes:

[0038] In the locked state, the electromagnetic telescopic assembly is energized, and the sliding pressure block is in a retracted state and is out of the sliding stroke of the pushing portion;

[0039] If the electromagnetic telescopic assembly is used for unlocking, identity verification is performed by the verification device. When the identity verification of the verification device is passed or the controller receives an external unlocking command, the controller controls the electromagnetic telescopic assembly to be powered off, so that the sliding pressure block extends to at least partially enter the sliding stroke of the pushing portion, and the lock can be unlocked by pushing the push rod;

[0040] If the lock is unlocked using the lock rotating assembly, the key is inserted into the lock hole to drive the rotating block to rotate, so that the rotating block pushes the toggle plate through the driving plate, and the lock tongue is retracted to unlock;

[0041] The position of the rotating block is sensed by the first sensing element, and when the rotating block rotates, a key unlocking prompt is issued;

[0042] The second sensor element senses the position of the lock tongue, and when the lock tongue remains in the retracted state, a door unlock prompt is issued;

[0043] The position of the push rod is sensed by a third sensing element, and when the authentication of the verification device fails and the push rod is pushed, an unauthorized push rod prompt is issued.

[0044] The advantages of the fire door push rod lock and control method thereof disclosed in the present invention are:

[0045] 1. The present invention provides an electromagnetic telescopic assembly and a lock rotation assembly, which can lock the push rod lock in both electromagnetic and mechanical ways, meeting the needs of internal personnel access management; and because it is equipped with two different unlocking methods, different unlocking methods can be configured for different personnel to meet the diverse needs of users; on the other hand, because it has both electromagnetic unlocking structure and mechanical unlocking structure, the electromagnetic unlocking structure can be quickly unlocked by swiping a card or fire linkage signal in an emergency. Moreover, when two unlocking structures are provided at the same time, when one unlocking structure fails, normal unlocking can be achieved through the other unlocking structure, thereby improving the reliability of the escape door lock and effectively reducing safety hazards;

[0046] 2. The electromagnetic telescopic assembly disclosed herein switches the push rod between unlocking and unlocking by extending or retracting the sliding pressure block. The electromagnetic telescopic structure has the advantages of simple structure, stable switching, and low malfunction, which can improve the reliability and stability of the push rod lock. On the other hand, the electromagnet disclosed herein switches between unlocking and unlocking by adsorbing a small sliding pressure block. Since there is no need to adsorb the entire toggle plate, the size of the sliding pressure block is very small, so the size of the required electromagnet is very small, and the corresponding current required to keep it in the energized and magnetized state is also very small. On the one hand, it can reduce the energy consumption of the device, and on the other hand, it can also greatly reduce the heat generated during power-on operation, reducing heat generation, which is conducive to improving the user experience and extending the service life.

[0047] 3. The present invention sets a first sensing element, a second sensing element and a third sensing element for sensing the positions of the rotating block, the lock tongue and the push rod respectively. The first sensing element can issue a key unlocking prompt when the key drives the rotating block to rotate, that is, when the key is unlocked. The second sensing element can sense the position of the lock tongue to determine whether the lock tongue is in a retracted or popped-out state, and then determine whether the escape door is locked, and issue a corresponding prompt when the door is not locked. The third sensing element is used to sense the position of the push rod, and cooperate with the verification device. When the identity authentication fails but the push rod is pushed, an unauthorized push rod prompt is issued. The push rod lock can perform various state detections and prompts to meet the usage needs of various types of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is one of the structural diagrams of the electromagnetic push unlocking device described in this embodiment;

[0049] Figure 2 This is the second structural diagram of the electromagnetic push unlocking device described in this embodiment (the front end housing is hidden);

[0050] Figure 3 This is one of the cross-sectional structural diagrams of the electromagnetic telescopic assembly described in this embodiment (with the sliding pressure block retracted);

[0051] Figure 4 This is the second cross-sectional structural diagram of the electromagnetic telescopic assembly position described in this embodiment (the sliding pressure block is extended);

[0052] Figure 5 This is the third cross-sectional structural diagram of the electromagnetic telescopic assembly position described in this embodiment (the push rod presses the lock tongue to retract);

[0053] Figure 6 is a schematic structural diagram of the rotating block according to this embodiment;

[0054] Figure 7 Schematic diagram of the structure of the driving board of this embodiment;

[0055] Figure 8 2 is a structural block diagram of the electromagnetic push unlocking device described in this embodiment.

[0056] Explanation of the accompanying drawings: 1-housing, 2-lock tongue, 21-toggle part, 3-toggle plate, 31-toggle end, 32-pushing end, 4-push rod, 41-pushing part, 5-electromagnetic telescopic assembly, 51-sliding pressure block, 511-slide rod, 52-mounting frame, 53-electromagnet, 54-elastic reset member, 6-lock rotation assembly, 61-rotation block, 611-lock hole, 612-abutting part, 6121-slope surface, 6122-card slot, 6123-step structure, 6124-sensing slot, 62-driving plate, 7-first sensing element, 8-synchronizing plate, 9-second sensing element, 10-third sensing element, 11-verification device, 12-prompt device, 13-controller, 14-infrared sensor, 15-communication module. DETAILED DESCRIPTION

[0057] like Figures 1-8 As shown, a fire door push rod lock according to the present disclosure includes:

[0058] The shell 1 is usually made of stainless steel and is in the shape of a "T" as a whole. It is hollow inside and the main body is in the shape of a long rod, usually called the base, which is used to cooperate with the push rod 4. The front end part is usually called the front cover, which extends to both sides to accommodate components such as the lock tongue 2. The base and the front cover are usually split and detachable connection structures to facilitate processing and assembly.

[0059] The lock tongue 2 is rotatably arranged at one end of the housing 1, usually the front end of the housing 1, and the lock tongue 2 can be rotated to be partially exposed outside the housing 1 or retracted into the housing 1, as shown in detail. Figure 2As shown, a square connecting platform formed by a plurality of square plates is provided inside the front end of the housing 1. The end of the lock tongue 2 is rotatably connected to the connecting platform via a connecting shaft, so that the lock tongue 2 can rotate around the connecting shaft. The housing 1 is provided with an opening at a position corresponding to the lock tongue 2. The lock tongue 2 can be rotated to be exposed from the opening and cooperate with the lock slot on the door frame to achieve locking, or rotated to be retracted into the housing 1 and disengaged from the lock slot to achieve unlocking. Typically, a pop-up spring is also provided at the rotation connection position of the lock tongue 2. The pop-up spring can be specifically a torsion spring, which is used to provide an elastic force for outward rotation, so that the lock tongue 2 always has a movement tendency to rotate to be exposed outside the housing 1, so as to maintain the locked state.

[0060] The toggle plate 3 is rotatably connected to the base of the housing 1, one end of which is a toggle end 31 that abuts against the lock tongue 2 and is used to toggle the lock tongue 2 to rotate to the retracted state, and the other end is a pushing end 32. Figure 3 As shown, the toggle plate 3 is in the shape of a long plate and is arranged along the length direction of the housing 1. The middle position is rotatably connected to the housing 1 so that the toggle plate 3 as a whole can rotate relative to the base of the housing 1. The right end (with Figure 3 When the pushing end 32 is pressed downward, the other end of the toggle plate 3 will be tilted upward, thereby pushing the lock tongue 2 inward.

[0061] The push rod 4 is slidably connected to the housing 1 so that the push rod 4 can slide in the direction close to the housing 1. Specifically, the push rod 4 is in the shape of a long rod and is used for pushing and unlocking. Usually, its width is smaller than the width of the housing 1. The housing 1 is provided with a mounting groove adapted to the push rod 4 at a position corresponding to the push rod 4. The push rod 4 is slidably embedded in the mounting groove and can be moved up and down along the mounting groove (in Figure 3 The push rod 4 slides in the direction shown as an example. Conventionally, a compression spring is provided between the push rod 4 and the housing 1. The compression spring is used to provide an upward elastic force so that the push rod 4 always remains away from the bottom surface of the housing 1, that is, it is used to realize automatic reset of the push rod 4 after being pushed.

[0062] The inner side surface of the push rod 4, i.e. the side close to the bottom surface of the shell 1, extends toward the shell 1 near the pushing end 32 to form a pushing portion 41 with a certain thickness. The pushing portion 41 protrudes downward by a certain thickness for performing a pushing action.

[0063] The electromagnetic telescopic assembly 5 is arranged on the pushing end 32, that is, near the pushing portion 41, and is located on the side of the pushing portion 41 in the vertical direction. The electromagnetic telescopic assembly 5 has a sliding pressure block 51 that can be extended or retracted by electromagnetic control, and the extension direction of the sliding pressure block 51 is usually along the length direction of the toggle plate 3. When the sliding pressure block 51 is extended outward along the toggle plate 3, the end of the sliding pressure block 51 can enter the sliding stroke of the pushing portion 41. At this time, when the pushing portion 41 is pressed downward, it will contact the sliding pressure block 51, and the toggle plate 3 will be pressed downward by the sliding pressure block 51. When the sliding pressure block 51 is retracted inwardly along the toggle plate 3, the end of the sliding pressure block 51 is out of the sliding stroke of the pushing portion 41. At this time, the push rod 4 is pressed downward, and the pushing portion 41 will not contact the sliding pressure block 51. The toggle plate 3 will not move due to the downward pressure of the push rod 4, and will be in a free state and cannot be unlocked by the push rod 4.

[0064] The lock rotating assembly 6 is arranged between the dial end 31 and the bottom surface of the housing 1. The lock rotating assembly 6 specifically includes a rotating block 61 and a driving plate 62. Figure 6 As shown, a disc-shaped adapter plate is formed at the bottom of the rotating block 61 for rotationally connecting with the bottom surface of the housing 1. A lock hole 611 is formed in the middle of the rotating block 61 and passes through the thickness direction of the rotating block 61 for inserting a key. The key can be inserted into the lock hole 611 to drive the rotating block 61 to rotate.

[0065] One side of the driving plate 62 abuts against the rotating block 61, and the other side is connected to the toggle end 31. During the rotation of the rotating block 61, it will contact the driving plate 62. More specifically, an edge of the driving plate 62 abutting against the rotating block 61 is inclined to the rotating block 61, so that during the rotation of the rotating block 61, the driving plate 62 can be gradually pushed upward, and then the toggle end 31 can be gradually pushed upward, and the lock tongue 2 can be toggled inward through the toggle end 31 to retract the lock tongue 2.

[0066] The first sensing element 7 is provided corresponding to the rotating block 61 and is used to sense the position of the rotating block 61. Specifically, the first sensing element 7 is provided beside the rotating block 61, and its sensing end extends into the rotation range of the rotating block 61 to sense the rotation angle of the rotating block 61, and then determine whether the key is used to unlock.

[0067] The second sensing element 9 is provided corresponding to the lock tongue 2 and is used to sense the position of the lock tongue 2, that is, to sense whether the lock tongue 2 is in a retracted or popped-out state, and then determine whether the push rod lock is normally locked.

[0068] The third sensing element 10 is provided corresponding to the push rod 4, and its sensing end extends into the end of the sliding stroke of the push rod 4, for sensing the position of the push rod 4, and then determining whether the push rod 4 is pushed.

[0069] The verification device 11 is used to perform user identity authentication. In an optional embodiment, the verification device 11 can be an IC card reader, an NFC card reader, a cipher or other commonly used verification devices. It can be configured with unlocking information and can issue an unlocking instruction when the correct unlocking information is recognized.

[0070] The prompting device 12 is used to play sound prompts and / or light prompts to provide corresponding status information prompts and alarm warnings.

[0071] The controller 13 has input terminals connected to the first, second, and third sensing elements 7, 9, 10, and verification device 11. The first, second, and third sensing elements 7, 9, and 10 sense the unlocked state of the key, the locked state of the lock tongue 2, and the pressed state of the push rod 4, respectively, and transmit these signals to the controller 13 for processing. The verification device 11 is also connected to the input terminals of the controller 13 and is configured to input an unlock command to the controller 13 upon successful authentication. The controller 13 also has an output terminal connected to the electromagnetic telescopic assembly 5. Upon successful authentication or receipt of an external unlock signal, the controller 13 outputs a power-off signal to the electromagnetic telescopic assembly 5, de-energizing the electromagnetic telescopic assembly 5 and extending the sliding pressure block 51, thereby enabling the push rod lock to be unlocked. The controller 13 also has an output terminal connected to the alarm device 12, which controls the alarm device 12 to issue a corresponding alarm based on the input signals from the first, second, and third sensing elements 7, 9, 10, and verification device 11. In specific embodiments, the controller 13 can be implemented as a PLC, MCU, or other commonly used control element.

[0072] The present invention provides an electromagnetic telescopic assembly 5 and a lock rotating assembly 6, which can lock the push rod lock in two ways, electromagnetic structure and mechanical structure, to meet the use requirements of internal personnel access management; and because two different unlocking methods are configured, different unlocking methods can be configured for different personnel to meet the diverse use requirements of users; on the other hand, because both the electromagnetic unlocking structure and the mechanical unlocking structure are provided, the electromagnetic unlocking structure can be quickly unlocked by swiping a card or a fire linkage signal in an emergency, and two unlocking structures are provided at the same time. When one of the unlocking structures fails, normal unlocking can be achieved by the other unlocking structure, thereby improving the reliability of the escape door lock and effectively reducing safety hazards;

[0073] The electromagnetic telescopic assembly 5 of the present invention switches the push rod 4 between unlocking and unlocking by extending or retracting the sliding pressure block 51. The electromagnetic telescopic structure has the advantages of simple structure, stable switching, and low malfunction, which can improve the reliability and stability of the push rod lock. On the other hand, the electromagnet 53 of the present invention switches between unlocking and unlocking by adsorbing a small piece of the sliding pressure block 51. Since there is no need to adsorb the entire toggle plate, the volume of the sliding pressure block 51 is very small, so the volume of the electromagnet 53 required is very small, and the corresponding current required to keep it in the energized and magnetized state is also very small. On the one hand, it can reduce the energy consumption of the device, and on the other hand, it can also greatly reduce the heat generated when it is powered on, reducing heat generation, which is conducive to improving the user experience and extending the service life.

[0074] The present disclosure sets a first sensing element 7, a second sensing element 9 and a third sensing element 10 for sensing the positions of the rotating block 61, the lock tongue 2 and the push rod 4 respectively. The first sensing element 7 can issue a key unlocking prompt when the key drives the rotating block 61 to rotate, that is, when the key is unlocked. The second sensing element 9 can sense the position of the lock tongue 2, determine whether the lock tongue 2 is in a retracted or popped-out state, and then determine whether the escape door is locked, and issue a corresponding prompt when the door is not locked. The third sensing element 10 is used to sense the position of the push rod 4, and cooperates with the verification device 11. When the identity authentication fails but the push rod 4 is pushed, an unauthorized push rod 4 prompt is issued. The push rod lock can perform various state detections and prompts to meet the usage needs of various types of users.

[0075] Furthermore, in this embodiment, the electromagnetic telescopic component 5 specifically includes:

[0076] The mounting frame 52 is a square frame with a hollow center for mounting other components. The mounting frame 52 is fixed to the pushing end 32 by bolts;

[0077] The electromagnet 53 is specifically a small square electromagnet, which is embedded in the mounting frame 52 and is connected to an external power supply through a connecting line. The power is supplied by the external power supply. An on-off switch is connected between the external power supply and the electromagnet 53 to control the on and off of the electromagnet 53. More specifically, the on-off switch can be a normally closed relay. The signal output end of the controller 13 can be connected to the control end of the normally closed relay. When the controller 13 has no signal output, the external power supply and the electromagnet 53 are connected, and the electromagnet is energized and magnetized. When the controller 13 outputs a power-off signal to the normally closed relay, the contacts of the relay are disconnected, thereby de-energizing and demagnetizing the electromagnet 53.

[0078] The sliding block 51 is made of a magnetically attractive material, such as iron, and is slidably connected to the mounting frame 52 and corresponds to the electromagnet 53. When the electromagnet 53 is energized to generate magnetism, a magnetic attraction force is generated on the sliding block 51, which adsorbs the sliding block 51 until it is in contact with the electromagnet 53, i.e., it is in a retracted state.

[0079] Specifically, the sliding pressure block 51 is slidably connected to the mounting frame 52 in the following manner: the middle portion of the sliding pressure block 51 extends to form a cylindrical slide rod 511, and the middle portion of the mounting frame 52 is formed with a slide hole that matches the slide rod 511. The middle portion of the electromagnet 53 is also formed with a matching avoidance hole. The slide rod 511 is slidably sleeved in the slide hole, allowing the sliding pressure block 51 to be slidably connected to the mounting frame 52. The above structure has the advantages of stable sliding fit and easy processing and assembly. After the slide rod 511 structure is provided, the sliding pressure block 51 can also be made of a magnetically attractive material only at the position of the slide rod 511. When the electromagnet 53 is energized, it generates a magnetic attraction force on the slide rod 511, thereby driving the entire sliding pressure block 51 to slide in the direction of the electromagnet 53 and be attracted.

[0080] The elastic reset member 54 has one end connected to the sliding pressing block 51 and the other end connected to the mounting bracket 52 . The elastic reset member 54 is used to provide elastic force so that the sliding pressing block 51 has a tendency to extend outward.

[0081] More specifically, the elastic reset member 54 is a compression spring, which is arranged between the end surface of the slide rod 511 and the mounting frame 52 to provide elastic force for the sliding pressure block 51 to pop outward. The compression spring has good elasticity and can provide sufficient elastic force.

[0082] In the above-mentioned electromagnetic telescopic component 5, when the electromagnet 53 is energized to generate magnetism, the electromagnet 53 generates a magnetic attraction force on the sliding pressure block 51, and the magnetic attraction force overcomes the elastic force generated by the elastic reset member 54, causing the sliding pressure block 51 to slide in the direction of the electromagnet 53 until it is adsorbed together with the electromagnet 53. The sliding pressure block 51 is in a retracted state and compresses the elastic reset member 54. When the electromagnet 53 is powered off and loses its magnetism, the electromagnet 53 no longer generates a magnetic attraction force on the sliding pressure block 51. At this time, the elastic reset member 54 recovers its deformation and pops outward, driving the sliding pressure block 51 to pop outward until it enters the sliding stroke of the pushing portion 41, thereby realizing the pop-up reset of the sliding pressure block 51.

[0083] The electromagnetic telescopic assembly 5 structure of this embodiment can control the extension and retraction of the sliding pressure block 51 by turning the electromagnet 53 on and off, adjust the relative position between the sliding pressure block 51 and the pushing portion 41, and then control the push rod lock to be in an unlockable state or a free and unlockable state, so as to achieve the management of people entering and leaving. The electromagnetic telescopic assembly 5 structure is stable, and the required electromagnet 53 is small in size, with low energy consumption, low heat generation and long service life. At the same time, since the push rod lock is in a locked state when the electromagnet 53 is energized and in an unlockable state when the electromagnet 53 is de-energized, it is applied to escape doors. When an emergency occurs and the electromagnet 53 is de-energized, the push rod lock can also be automatically opened, ensuring that the push rod lock is in an openable state in an emergency.

[0084] The pressing portion 41 is a rectangular block extending along the length of the push rod 4. This length facilitates engagement with and pressing the sliding block 51. In a preferred embodiment, the pressing portion 41 is hollow to reduce the weight of the push rod 4 and minimize material requirements. The bottom surface of the pressing portion 41 has arc-shaped transitions at both ends to facilitate engagement with the sliding block 51 and avoid wear and tear caused by collisions caused by sharp edges.

[0085] A pressing groove (not shown in the figure) is formed on one side edge of the sliding pressing block 51 close to the pushing portion 41 at a position corresponding to the pushing portion 41. The width of the pressing groove is adapted to the width of the pushing portion 41. The pressing groove structure allows the pushing portion 41 to be embedded in the pressing groove when pushing the sliding pressing block 51, making the cooperation between the pushing portion 41 and the sliding pressing block 51 more stable and avoiding slipping.

[0086] A pair of first connecting holes is formed in the middle of the toggle plate 3, and matching second connecting holes are formed on the opposite side walls of the shell 1. The adapter shaft is passed through the first connecting hole and the second connecting hole to rotatably connect the middle of the toggle plate 3 to the shell 1, and the toggle plate 3 can be divided into a front section and a rear section from the rotation connection position. The section that cooperates with the lock tongue 2 is defined as the front section, and the section with the pushing end 32 is defined as the rear section. The front section and the rear section are both tilted upward by a certain arc, so that the angle between the front section and the rear section is 170°~175°, so that the toggle plate 3 has a bent plate structure as a whole, which can be conveniently driven by pressing the pushing end 32 to rotate the lock tongue 2.

[0087] Further, in this embodiment, please refer to Figure 3-Figure 6 , a side of the rotating block 61 facing the driving plate 62, that is, an upper end surface shown in the figure, is formed with an upwardly protruding abutment portion 612, the abutment portion 612 is located at one side edge of the rotating block 61 and has a certain height;

[0088] The driving plate 62 is V-shaped, with one edge being attached to the lower surface of the dial end 31 and fixed by bolts, and the other edge being obliquely abutted against the abutment portion 612;

[0089] The length of the abutment 612 should be less than the length of the driving plate 62, so that when the rotating block 61 is rotated to the locked state, the two ends of the driving plate 62 will be exposed outside the two ends of the abutment 612. More specifically, in the locked state, the abutment 612 is located beside the edge of one side of the driving plate 62, deviating from the driving plate 62, so that the abutment 612 and the driving plate 62 are in a parallel structure. When the rotating block 61 starts to rotate from the locked state, the toggle portion 21 rotates in contact with the outer wall of the driving plate 62 and gradually pushes the driving plate 62 upward during the rotation process. When the rotating block 61 rotates about 90°, the rotating block 61 pushes the driving plate 62 to the highest point, and at the same time pushes the toggle end 31 of the toggle plate 3 to the highest point, thereby toggling the lock tongue 2 to the retracted state to achieve unlocking.

[0090] The above-mentioned structure of the rotating block 61 and the driving plate 62 has the advantages of simple structure and stable fit.

[0091] More specifically, the upper end of the abutment portion 612 facing the drive plate 62 has a sloped surface 6121 whose slope is adapted to the edge of the drive plate 62, so that the abutment portion 612 can fit well with the drive plate 62 in the locked state, ensuring that the abutment portion 612 and the drive plate 62 cooperate stably. In a preferred embodiment, the sloped surface 6121 can also be processed with an arc transition so that the sloped surface 6121 is an arc-shaped surface as a whole, so that the sloped surface 6121 and the drive plate 62 cooperate smoothly during rotation and are not easy to get stuck.

[0092] Two slots 6122 are formed on the side of the abutment portion 612 facing the drive plate 62, which are spaced apart and extend along the height direction of the abutment portion 612. The slots 6122 are V-shaped, and both sides of the abutment portion 612 in the length direction have step structures 6123. The slots 6122 and the step structures 6123 are both used to engage and position with the lower edge of the drive plate 62 during the rotation of the rotating block 61.

[0093] The above-mentioned abutment portion 612 structure can stably cooperate with the driving plate 62 to achieve unlocking by key rotation.

[0094] Furthermore, in this embodiment, the first sensing element 7 is arranged on the side of the rotating block 61 away from the lock tongue 2, and a sensing groove 6124 is formed at a position corresponding to the first sensing element 7 when the rotating block 61 is in the locked state. Specifically, the first sensing element 7 can be a micro switch or a photoelectric sensor. Taking the micro switch as an example, in the locked state, the micro switch corresponds to the sensing groove 6124, and the sensing end of the micro switch extends into the sensing groove 6124. At this time, there is no external force on the sensing end and no signal is output. When the rotating block 61 is driven to rotate by the key, the sensing groove 6124 gradually deviates from the micro switch. When the outer wall of the rotating block 61 contacts the micro switch, the micro switch is squeezed to generate a sensing signal, and it is determined that the rotating block 61 is driven by the key to rotate and unlock.

[0095] The above-mentioned first sensing element 7 and sensing slot 6124 structure can detect the position of the rotating block 61 and then determine whether the key is used to unlock it.

[0096] The lock tongue 2 is coaxially connected to a synchronization plate 8, which is adapted to the shape of the lock tongue 2 and is correspondingly arranged so that the synchronization plate 8 and the lock tongue 2 rotate synchronously. The position of the lock tongue 2 can be judged by sensing the position of the synchronization plate 8, and then the locked state of the push rod lock can be judged. The second sensing element 9 is arranged on the side of the synchronization plate 8 when the lock tongue 2 is retracted, and is used to sense the position of the synchronization plate 8. Specifically, the second sensing element 9 can be a micro switch or a photoelectric sensor. Taking the micro switch as an example, the sensing end of the micro switch extends into the retraction stroke of the synchronization plate 8. When the synchronization plate 8 is in the retracted state, the synchronization plate 8 squeezes the sensing end of the micro switch to generate a sensing signal, judging that the lock tongue 2 is in the retracted state and the push rod lock is not locked. Otherwise, it is judged that the lock tongue 2 is in the pop-up state and the push rod lock is locked.

[0097] The third sensing element 10 is arranged on the side of the end of the sliding stroke of the push rod 4. The third sensing element 10 is extended to form a sensing plate that extends into the end of the sliding stroke of the push rod 4. The third sensing element 10 can specifically be a micro switch with a sensing plate. When the push rod 4 is pushed and slid to the end of its stroke, the end of the push rod 4 contacts the sensing plate, pressing the sensing plate to generate a sensing signal, thereby determining that the push rod 4 is pressed.

[0098] Furthermore, in this embodiment, one end of the lock tongue 2 close to the toggle plate 3 extends toward the toggle plate 3 to form a toggle portion 21 for abutting against the toggle plate 3. The side of the toggle portion 21 facing the toggle plate 3 is an arc surface, and the thickness of the toggle portion 21 gradually decreases in the direction close to the toggle plate 3, and forms an arc-shaped angle structure at the end. The above-mentioned toggle portion 21 structure can cooperate with the toggle plate 3 to ensure that the toggle unlocking process is stable and smooth.

[0099] Furthermore, in this embodiment, the prompting device 12 includes a speaker and a prompting light. The speaker is disposed in the middle of the long rod portion of the housing 1. The housing 1 has a corresponding sound hole at the position of the speaker for playing a sound prompt. The prompting light is specifically an LED light for providing a light prompt by flashing.

[0100] Furthermore, in this embodiment, the fire door push rod lock further includes:

[0101] The infrared sensor 14 is arranged on the outer surface of the shell 1 and is connected to the input signal of the controller 13. The infrared sensor 14 can perform infrared sensing on the outside of the push rod lock. When a person approaches, it can generate a sensing signal and input it into the controller 13. The controller 13 can control the prompt device 12 to issue a corresponding prompt.

[0102] Furthermore, in this embodiment, the communication module 15 is connected to the controller 13 by signal and is used for external communication. Specifically, the communication module 15 can be a 4G module, a 5G module or a WiFi module, which is used for wireless communication with the background management end, and can also be linked with the fire protection system, and can be unlocked by external signal input control.

[0103] The following will combine the above content to fully explain the working process of the fire door push rod lock of this embodiment:

[0104] A fire door push rod lock with the electromagnetic push unlocking device of this embodiment is installed on the fire door. In this embodiment, the verification device 11 is an IC card reader. The user authenticates his identity through an IC card, configures specific unlocking information for the IC card reader, and connects the IC card reader to the controller 13 signal. Only when an IC card with unlocking authority is placed on the IC card reader and read by the device, the IC card reader will input a verification pass signal to the controller 13.

[0105] like Figure 3 As shown, this state is the locked state of the push rod lock, that is, the lock tongue 2 naturally pops out of the shell 1 and embeds into the lock groove of the door frame to achieve locking. In this state, the electromagnet 53 is in the energized state and is magnetic. The magnetic attraction generated will adsorb the sliding pressure block 51, compress the elastic reset member 54, and the sliding pressure block 51 will retract and disengage from the sliding stroke of the pushing portion 41 and be in a free state. At this time, when the push rod 4 is pushed, the push rod 4 will not come into contact with the sliding pressure block 51, and the toggle plate 3 cannot be rotated to toggle the lock tongue 2. Pushing the push rod 4 will not unlock the push rod lock.

[0106] When the push rod lock needs to be unlocked, an authorized IC card is placed on the IC card reader, and the device reads and identifies the IC card information. After verification, a verification pass signal is input to the controller 13, and the controller 13 sends a power-off signal to the on-off switch of the electromagnet 53, so that the electromagnet 53 is powered off. At this time, since the electromagnet 53 is powered off and no longer generates magnetic attraction, the elastic reset member 54 recovers its deformation outwards, driving the sliding pressure block 51 to pop outwards. Figure 4 As shown, the sliding pressing block 51 will be ejected to the bottom of the pushing portion 41 and enter into the sliding stroke of the pushing portion 41.

[0107] Press the push rod 4 to slide toward the bottom of the shell 1. The pushing portion 41 contacts the sliding block 51, driving the sliding block 51 to slide synchronously toward the bottom of the shell 1. At this time, the pushing end 32 of the toggle plate 3 rotates toward the bottom of the shell 1, and the other end rotates in the opposite direction, toggling the lock tongue 2 inward to the position as shown in FIG. Figure 5 In the state shown, the push rod lock is unlocked. After releasing the push rod 4, the push rod 4 and the lock tongue 2 can be automatically reset under the action of the corresponding reset spring.

[0108] During the process of pressing the push rod 4, the end of the push rod 4 will contact the sensing plate of the third sensing element 10, causing it to generate a sensing signal. If the controller 13 receives a verification pass signal from the verification device 11 within 5 seconds at a certain moment before the third sensing element 10 generates the sensing signal, the controller 13 controls the prompt device 12 to issue a prompt of normal push rod unlocking. Otherwise, the controller controls the prompt device 12 to issue an unauthorized push rod prompt.

[0109] The above process is the electromagnetic unlocking process using the electromagnetic telescopic assembly 5. The process of unlocking with a key is as follows:

[0110] In the locked state, the electromagnet 53 is energized, and the sliding pressure block 51 is in a retracted state and attracted to the electromagnet 53. At this time, pressing the push rod 4 cannot unlock the push rod lock, but the toggle plate 3 can be driven to rotate normally. At this time, the abutment 612 of the rotating block 61 is located beside the drive plate 62 and is arranged in parallel with the drive plate 62. The key is inserted into the lock hole 611 of the rotating block 61, and the key is turned to drive the rotating block 61 to rotate. During the rotation of the rotating block 61, the abutment 612 gradually pushes the drive plate 62 upward, and then pushes the toggle plate 3 upward. The toggle plate 3 toggles the lock tongue 2 to rotate inward clockwise. When the abutment 612 pushes the drive plate 62 to the highest point, the lock tongue 2 retracts into the housing 1 and disengages from the lock slot, achieving key unlocking. During the key unlocking process, when the rotating block 61 is turned by the key, the first sensing element 7 senses the rotation of the rotating block 61, determines that the key is used to unlock, and the first sensing element 7 inputs a sensing signal to the controller 13, and the controller 13 controls the prompt device 12 to issue a key unlocking prompt.

[0111] During daily use of the push rod lock, the second sensing element 9 continuously senses the position of the synchronization plate 8. When the synchronization plate 8 is continuously in the retracted state, the second sensing element 9 continuously generates a sensing signal. If the sensing signal is generated for 30 seconds, it indicates that the lock tongue 2 may be squeezed back by the door frame and is not normally embedded in the lock slot. The controller 13 controls the prompt device 12 to issue a prompt that the door is not locked.

[0112] The infrared sensor 14 can be used to sense the approach of people at the fire door. When a person enters the sensing range of the infrared sensor 14, the infrared sensor 14 generates a sensing signal which is input into the controller 13. The controller 13 controls the prompt device 12 to issue a person approaching prompt.

[0113] The controller 13 can establish a communication connection with the background management terminal through the communication module 15, and can also be connected to the fire protection system. When an emergency occurs, the fire protection system can output an unlocking command to cut off the power of the electromagnet 53 to achieve rapid unlocking.

[0114] This embodiment further provides a control method for a fire door push rod lock, which is applied to the fire door push rod lock described above. The control method includes:

[0115] In the locked state, the electromagnetic telescopic assembly 5 is energized, and the sliding pressure block 51 is in a retracted state and is out of the sliding stroke of the pushing portion 41;

[0116] If the electromagnetic telescopic assembly 5 is used for unlocking, identity verification is performed by the verification device 11. When the identity verification of the verification device 11 is successful or the controller 13 receives an external unlocking command, the controller 13 controls the electromagnetic telescopic assembly 5 to be powered off, so that the sliding pressure block 51 extends until it at least partially enters the sliding travel of the pushing portion, and the lock can be unlocked by pushing the push rod 4.

[0117] If the lock is unlocked using the lock rotating assembly 6, the key is inserted into the lock hole 611 to drive the rotating block 61 to rotate, so that the rotating block 61 pushes the toggle plate 3 through the driving plate, and the lock tongue 2 is retracted to unlock;

[0118] The first sensing element 7 senses the position of the rotating block 61, and when the rotating block 61 rotates, a key unlocking prompt is issued;

[0119] The second sensing element 9 senses the position of the lock tongue 2, and when the lock tongue 2 is continuously in the retracted state, a door unlock prompt is issued;

[0120] The position of the push rod 4 is sensed by the third sensing element 10 , and when the authentication of the verification device 11 fails and the push rod 4 is pushed, an unauthorized push rod 4 prompt is issued.

[0121] The control method of this embodiment is applied to the above-mentioned fire door push rod lock. It is based on the same inventive concept as the above-mentioned fire door push rod lock and can be understood with reference to the above description, so it will not be repeated again.

[0122] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present disclosure.

[0123] Those skilled in the art can make various other corresponding changes and deformations based on the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of this disclosure.

Claims

1. A fire door push rod lock, characterized in that: include: The shell is in a "T" shape; A lock tongue is rotatably disposed at one end of the housing, and the lock tongue can be rotated to be partially exposed outside the housing or retracted into the housing; A toggle plate, one of which is rotatably connected to the housing, and one end of the toggle plate is a toggle end, the toggle end abuts against the lock tongue and is used to toggle the lock tongue to rotate to a retracted state, and the other end is a pushing end; A push rod is slidably connected to the housing so that the push rod can slide in a direction close to the housing, and a position of the push rod close to the pushing end extends toward the housing to form a pushing portion; an electromagnetic telescopic assembly disposed on the pushing end, the electromagnetic telescopic assembly comprising a sliding pressure block that can be extended or retracted by electromagnetic control, wherein the sliding pressure block at least partially enters the sliding stroke of the pushing portion in an extended state and is out of the sliding stroke of the pushing portion in a retracted state; A lock latch rotating assembly is provided between the toggle end and the bottom surface of the housing, the lock latch rotating assembly comprising a rotating block and a driving plate, the rotating block being rotatably connected to the housing and having a lock hole for inserting a key, one side of the driving plate abutting the rotating block and the other side connected to the toggle end, when the rotating block rotates to an unlocked position, the rotating block pushes the toggle end through the driving plate, toggling the lock tongue to retract; a first sensing element, which is provided corresponding to the rotating block and is used to sense the position of the rotating block; a second sensing element, which is provided corresponding to the lock tongue and is used to sense the position of the lock tongue; a third sensing element, which is provided corresponding to the push rod and is used to sense the position of the push rod; a verification device for performing identity verification; a prompting device for playing an audible prompt and / or a light prompt; The controller has an input end respectively connected to the first sensing element, the second sensing element, the third sensing element and the verification device signal, and an output end respectively connected to the electromagnetic telescopic component and the prompt device signal.

2. The fire door push rod lock according to claim 1, characterized in that: The electromagnetic telescopic assembly comprises: The mounting frame is provided on the pushing end; the middle portion of the sliding pressure block extends to form a sliding rod, the mounting frame is formed with a sliding hole adapted to the sliding rod, the sliding rod is slidably sleeved in the sliding hole, so that the sliding pressure block is slidably connected to the mounting frame; An electromagnet is provided on the mounting frame; the sliding pressing block is made of a magnetically attractive material, is slidably connected to the mounting frame and corresponds to the electromagnet; An elastic reset member has one end connected to the sliding pressing block and the other end connected to the mounting bracket. The elastic reset member is configured to enable the sliding pressing block to have a movement tendency to extend outward.

3. The fire door push rod lock according to claim 1, characterized in that: The pushing portion is a rectangular block extending along the length direction of the push rod. The interior of the pushing portion is hollow, and both ends of the bottom surface thereof are arc-shaped transitions. A pressing groove is formed on one side edge of the sliding pressing block close to the pushing portion at a position corresponding to the pushing portion, and the groove width of the pressing groove is adapted to the width of the pushing portion.

4. The fire door push rod lock according to claim 1, characterized in that: An upwardly protruding abutting portion is formed on a surface of the rotating block facing the driving plate; The driving plate is in a "V" shape, one side edge of which is in contact with and connected to the dial end, and the other side edge is inclined to abut against the abutment portion; The length of the abutting portion is smaller than the length of the driving plate, so that when the rotating block is locked, both ends of the driving plate are exposed outside both ends of the abutting portion.

5. The fire door push rod lock according to claim 4, characterized in that: The first sensing element is arranged on a side of the rotating block away from the lock tongue, and a sensing groove is formed at a position corresponding to the first sensing element when the rotating block is in a locked state; The lock tongue is coaxially connected to a synchronization plate, which is adapted to the shape of the lock tongue and is correspondingly arranged so that the synchronization plate and the lock tongue rotate synchronously; the second sensing element is arranged beside the synchronization plate when the lock tongue is retracted, and is used to sense the position of the synchronization plate; The third sensing element is arranged beside the end of the sliding stroke of the push rod, and the third sensing element is extended to form a sensing plate extending into the end of the sliding stroke of the push rod.

6. The fire door push rod lock according to claim 1, characterized in that: One end of the lock tongue close to the toggle plate extends toward the toggle plate to form a toggle portion for abutting against the toggle plate. The toggle portion has an arc surface facing the toggle plate, and the thickness of the toggle portion gradually decreases in the direction close to the toggle plate, forming an arc-shaped angle structure at the end. A pop-up spring is provided at the rotation connection position between the lock tongue and the shell, and the pop-up spring is configured to enable the lock tongue to have a movement tendency of rotating to be exposed outside the shell.

7. The fire door push rod lock according to claim 1, characterized in that: The prompt device includes a speaker and a prompt light.

8. The fire door push rod lock according to claim 1, characterized in that: Also includes: The infrared sensor is arranged on the outer surface of the shell and is connected to the input terminal signal of the controller.

9. The fire door push rod lock according to claim 1, characterized in that: Also includes: The communication module is connected to the controller signal and is used for external communication.

10. A method for controlling a push rod lock of a fire door, characterized in that: Applied to the fire door push rod lock according to any one of claims 1 to 9, the control method includes: In the locked state, the electromagnetic telescopic assembly is energized, and the sliding pressure block is in a retracted state and is out of the sliding stroke of the pushing portion; If the electromagnetic telescopic assembly is used for unlocking, identity verification is performed by the verification device. When the identity verification of the verification device is passed or the controller receives an external unlocking command, the controller controls the electromagnetic telescopic assembly to be powered off, so that the sliding pressure block extends to at least partially enter the sliding stroke of the pushing portion, and the lock can be unlocked by pushing the push rod; If the lock is unlocked using the lock rotating assembly, the key is inserted into the lock hole to drive the rotating block to rotate, so that the rotating block pushes the toggle plate through the driving plate, and the lock tongue is retracted to unlock; The position of the rotating block is sensed by the first sensing element, and when the rotating block rotates, a key unlocking prompt is issued; The second sensor element senses the position of the lock tongue, and when the lock tongue remains in the retracted state, a door unlock prompt is issued; The position of the push rod is sensed by a third sensing element, and when the authentication of the verification device fails and the push rod is pushed, an unauthorized push rod prompt is issued.

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