Emergency door unlocking device

Abstract

The utility model discloses an emergency door unlocking device which comprises a door frame assembly, and a door leaf assembly is hinged to the interior of the door frame assembly. A pressing type alarm mounted on a wall body is arranged on the left side of the door frame assembly; the door frame assembly comprises a door frame, a lock groove formed in the left side in the door frame and a baffle vertically movably arranged on the rear side of the lock groove, a rack is fixed to the top of the baffle, and a plug pin is fixed to the bottom of the baffle. According to the emergency door unlocking device provided by the technical scheme, the rack is driven by the motor to drive the baffle to move, separation or combination of the plug pin and the lock bolt is achieved, the unlocking process is rapid and reliable, and a door leaf can be rapidly opened in an emergency; in addition, the emergency door unlocking device is high in safety, the baffle blocks the lock bolt in the normal state, the door leaf is effectively prevented from being opened illegally, unlocking can be triggered only when the glass plate is broken by external force through the pressing type alarm, and misoperation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of emergency door unlocking technology, specifically to an emergency door unlocking device. Background Technology

[0002] In densely populated areas such as shopping malls, schools, and hospitals, emergency doors are crucial passageways for ensuring life safety during emergency evacuations. However, traditional emergency door unlocking methods have significant drawbacks. Some emergency doors rely on purely mechanical structures, such as complex linkages and latch combinations. After prolonged use, wear and deformation of components can lead to unlocking difficulties or even malfunctions. Emergency doors in older buildings often cannot be opened in emergencies due to such problems. Other emergency doors require specific tools or cumbersome operations for unlocking, such as special keys or multi-step rotating lock cylinders. In emergencies like fires or earthquakes, people may struggle to operate quickly and accurately due to panic, significantly delaying escape time. Furthermore, some emergency doors rely on external power supplies. In the event of a power outage or other unforeseen circumstances, the unlocking function immediately fails, rendering them useless in emergencies. This emergency door unlocking device addresses these practical pain points by innovatively designing an emergency door unlocking mechanism that improves the safety and practicality of emergency doors. Utility Model Content

[0003] The purpose of this utility model is to provide a technical solution for an emergency door unlocking device to address the shortcomings mentioned in the background art. To overcome the drawbacks and defects described in the background art, this technical solution includes the following:

[0004] It includes a door frame assembly, and a door leaf assembly is hinged inside the door frame assembly; a push-button alarm is provided on the left side of the door frame assembly and mounted on the wall.

[0005] The door frame assembly includes a door frame, a lock groove opened on the left side inside the door frame, and a baffle that is movably disposed on the rear side of the lock groove. A rack is fixed to the top of the baffle, and a pin is fixed to the bottom of the baffle. A motor is embedded in the left side inside the door frame, and the output shaft of the motor is connected to a gear that meshes with the rack.

[0006] The door assembly includes a door leaf, a door lock installed on the left side inside the door leaf, and a bolt located on the left side of the door lock and inserted into the lock groove.

[0007] As a preferred embodiment of this utility model: a strip-shaped cavity for the baffle to move up and down is provided on the left side of the door frame, and a slide rail is provided on the front side wall of the inner cavity of the strip-shaped cavity, and a slider adapted to the slide rail is fixed at the bottom of the rear surface of the rack.

[0008] As a preferred embodiment of this utility model: the bottom surface of the inner cavity of the lock groove is provided with an insertion hole, and the bottom end of the pin is inserted into the insertion hole.

[0009] As a preferred embodiment of this utility model, the rear surface of the baffle is flush with the rear end face of the door frame.

[0010] As a preferred embodiment of this utility model: a motor compartment for mounting and fixing a motor is provided on the upper left side of the inside of the door frame, and a lithium battery for powering the motor is installed inside the motor compartment.

[0011] As a preferred embodiment of this utility model, a Type-C charging interface for charging the lithium battery is installed on the rear end face of the motor compartment.

[0012] As a preferred embodiment of this utility model: a rack receiving chamber is provided on the upper left side of the inside of the door frame for the rack to move upward and accommodate. A magnet is fixed to the top of the inner cavity of the rack receiving chamber, and a magnetic sheet that is attracted to the magnet is fixed to the top of the rack.

[0013] As a preferred embodiment of this utility model: the push-button alarm includes a housing, a push-button switch installed inside the housing, and a glass plate embedded in the rear surface of the housing, wherein the push-button switch is electrically connected to a motor and a lithium battery via a wiring harness.

[0014] As a preferred embodiment of this utility model, the surface of the housing is coated with the words "knock to unlock".

[0015] As a preferred embodiment of this utility model: three headers are fixed on the right side of the rear surface of the door leaf, and three door hinges adapted to the headers are fixed on the right side of the rear surface of the door frame, and the door leaf is designed to be pulled back.

[0016] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0017] The emergency door unlocking device provided by this technical solution uses a motor-driven rack to move a baffle, thereby separating or engaging the bolt and latch. The unlocking process is fast and reliable, and the door can be opened quickly in an emergency. Moreover, the emergency door unlocking device is highly secure. Under normal conditions, the baffle blocks the latch, effectively preventing the door from being opened illegally. The push-button alarm requires external force to break the glass plate to trigger the unlocking, thus avoiding misoperation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the emergency door;

[0020] Figure 2 This is a schematic diagram of the door frame mechanism;

[0021] Figure 3 For the appendix Figure 2 A magnified diagram of region a in the image;

[0022] Figure 4 This is a schematic diagram of the door mechanism.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Door frame assembly; 11. Door frame; 12. Door hinge; 13. Lock groove; 14. Strip chamber; 15. Slide rail; 16. Motor; 17. Motor compartment; 18. Rack housing chamber; 19. Lithium battery; 110. Gear; 111. Rack; 112. Baffle; 113. Bolt; 2. Door leaf assembly; 21. Door leaf; 22. Door lock; 23. Lock bolt; 24. Header; 3. Press-type alarm. Detailed Implementation

[0025] To provide a clearer explanation and description of the technical solution and implementation of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below.

[0026] The following description is exemplary in nature and is not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. The figures are merely schematic representations of the concept and principles of embodiments of this disclosure and do not necessarily show the specific dimensions and scale of each embodiment. Specific details or structures of embodiments of this disclosure may be exaggerated in particular portions of certain figures. The disclosures of various publications, patents, and published patent specifications cited herein are incorporated herein by reference in their entirety. The technical solutions of this utility model will be clearly and completely described below in conjunction with embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model.

[0027] Example 1: This emergency door unlocking device consists of a door frame assembly 1 and a door leaf assembly 2 as its main structure. The door frame assembly 1 is made of metal, with a strip-shaped chamber 14 on its left side serving as the vertical movement space for the baffle 112. A slide rail 15 is provided on the front side of the inner wall of the chamber, which cooperates with the slider on the rear side of the rack 111 to ensure that the baffle 112 remains horizontal and stable when moving up and down. A lock groove 13 is provided in front of the strip-shaped chamber 14, and a socket for matching the pin 113 is provided at the bottom. The motor 16 is fixed to the upper left corner of the door frame 11 via a motor compartment 17. Its output shaft is connected to a gear 110 via a coupling, forming a transmission system with the rack 111 to drive the baffle 112 to rise and fall. A lithium battery 19 is built into the motor compartment 17 to power the motor 16, and a Type-C charging port is located on the rear side of the compartment for easy external charging. The push-button alarm 3 is installed on the left wall of the door frame 11. Its housing surface is sprayed with a "Break to Unlock" warning label. The internal push-button switch forms a control circuit with the motor 16 and lithium battery 19 through a wiring harness. When the glass is broken, the switch is triggered to start the unlocking procedure. The door leaf 21 of the door leaf assembly 2 is hinged to the three door hinges 12 on the right side of the door frame 11 through three caps 24. The door lock 22 is installed on the left side of the door leaf 21. The bolt 23 is horizontally inserted into the lock groove 13 to achieve closure and locking.

[0028] In normal operation, baffle 112 is in the lower position, with part of rack 111 protruding below the strip-shaped chamber 14. The pin 113 is inserted into the socket, and the rear surface of baffle 112 is flush with the rear end face of the door frame 11. At this time, baffle 112 blocks the bolt 23, and the door 21 remains locked. In an emergency, when an external force breaks the glass of the push-button alarm 3, the push-button switch is triggered, energizing motor 16. This drives rack 111 upwards via gear 110, causing baffle 112 to move upwards simultaneously. The pin 113 then disengages from the socket, and baffle 112 releases its obstruction of bolt 23. At this point, bolt 23 can freely move in and out of the lock groove 13 with the operation of door lock 22, unlocking and opening the door 21. A rack and pinion receiving chamber 18 is located at the upper left corner of the door frame 11. It is used to house the upper part of the rack and pinion 111 when the baffle 112 moves upward. A magnet is fixed to the top of the inner cavity of the rack and pinion receiving chamber 18, and a magnetic sheet is fixed to the top of the rack and pinion 111 to attract the magnet. After the rack and pinion 111 is driven into the rack and pinion receiving chamber 18, the magnet and magnetic sheet attract each other, preventing the rack and pinion 111 from falling off and causing the baffle 112 to fall back to its blocking position against the bolt 23. The entire unlocking process ensures both security for daily use and rapid response in emergencies.

[0029] Example 2: Based on Example 1, the structural design is further optimized. The door frame 11 is made of high-strength aluminum alloy, and the surface is anodized to enhance corrosion resistance. Wear-resistant bushings are added to the inner wall of the strip chamber 14 to reduce frictional resistance when the baffle 112 moves up and down. The rack 111 and gear 110 adopt involute tooth profiles with a module of 2 to ensure smooth transmission and strong load-bearing capacity. The housing of the push-button alarm 3 is made of engineering plastic injection molding, and a waterproof sealing ring is set inside to prevent moisture from entering and damaging the circuit. The lithium battery 19 is a 24V / 5Ah lithium iron phosphate battery pack, with intelligent charging management circuit, which has overcharge and over-discharge protection functions. When the push-button alarm 3 is triggered, the motor 16 drives the gear 110 to rotate at a speed of 120 revolutions per minute, which drives the baffle 112 to complete the upward stroke within 3 seconds through the rack 111, realizing rapid unlocking. The door leaf 21 adopts a double-layer steel plate sandwiched with fireproof rock wool structure, which ensures both strength and fire resistance. A nylon bushing is installed at the joint between the door header 24 and the door hinge 12 to reduce wear and lower the noise of opening and closing the door.

[0030] Example 3: Based on Example 2, intelligent monitoring functionality is added. A microcontroller is integrated into the door frame assembly 1, connected to the push-button switch of the push-button alarm 3, the drive circuit of the motor 16, and the power detection module of the lithium battery 19. When the push-button alarm 3 is triggered, the microcontroller records the unlocking time and sends alarm information to the remote monitoring center via a wireless communication module. The lithium battery 19 is equipped with a power display screen to show the remaining power in real time; a low-power alarm is triggered when the power level drops below 20%. The motor 16 is equipped with a torque sensor, which automatically stops operation when the baffle 112 is obstructed, preventing mechanical jamming and equipment damage. A gravity sensor is installed inside the door leaf 21; when an abnormal impact force is detected, the door lock 22 is automatically locked and a local audible and visual alarm is triggered. The entire system has multiple safety protection mechanisms, meeting emergency unlocking needs while improving overall safety and intelligence.

[0031] Based on the above-described preferred technical solution, the workflow of this technical solution is explained as follows:

[0032] Under normal conditions, the baffle 112 of the door frame assembly 1 is in the lower position, the rack 111 is partially exposed below the strip-shaped chamber 14, the pin 113 is inserted into the insertion hole at the bottom of the lock groove 13, and the rear surface of the baffle 112 is flush with the rear end face of the door frame 11. At this time, the baffle 112 prevents the bolt 23 from retracting, and the door leaf 21 is kept locked by the cooperation of the door lock 22 and the bolt 23. The magnet fixed at the top of the rack receiving chamber 18 attracts the magnetic piece fixed at the top of the rack 111, keeping the rack 111 stable. When an emergency occurs and unlocking is required, an external force breaks the glass plate of the push-button alarm 3, triggering the push-button switch. The lithium battery 19 supplies power to the motor 16, and the output shaft of the motor 16 drives the gear 110 to rotate via a coupling. The gear 110 meshes with the rack 111, driving the rack 111 to move upward. The magnetic plate at the top of the rack 111 separates from the magnet at the top of the rack receiving chamber 18. The rack 111 drives the baffle 112 to move upward in sync, and the pin 113 disengages from the insertion hole at the bottom of the lock groove 13. The baffle 112 releases its obstruction of the bolt 23, pulling the door leaf 21 backward to unlock and open the door.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An emergency door unlocking device, comprising a door frame assembly (1), characterized in that: The door frame assembly (1) is internally hinged to a door leaf assembly (2); a push-button alarm (3) is installed on the left side of the door frame assembly (1) and mounted on the wall. The door frame assembly (1) includes a door frame (11), a lock groove (13) opened on the left side inside the door frame (11), and a baffle (112) that is movably arranged on the rear side of the lock groove (13). A rack (111) is fixed to the top of the baffle (112), and a pin (113) is fixed to the bottom of the baffle (112). A motor (16) is embedded in the left side inside the door frame (11), and the output shaft of the motor (16) is connected to a gear (110) that meshes with the rack (111). The door assembly (2) includes a door leaf (21), a door lock (22) installed on the left side inside the door leaf (21), and a bolt (23) located on the left side of the door lock (22) and inserted into the lock groove (13).

2. The emergency door unlocking device according to claim 1, characterized in that: The door frame (11) has a strip-shaped chamber (14) on the left side for the baffle (112) to move up and down, and a slide rail (15) is provided on the front side wall of the inner cavity of the strip-shaped chamber (14). A slider adapted to the slide rail (15) is fixed at the bottom of the rear surface of the rack (111).

3. An emergency door unlocking device according to claim 1, characterized in that: The bottom surface of the inner cavity of the lock groove (13) is provided with an insertion hole, and the bottom end of the pin (113) is inserted into the insertion hole.

4. An emergency door unlocking device according to claim 1, characterized in that: The rear surface of the baffle (112) is flush with the rear end face of the door frame (11).

5. An emergency door unlocking device according to claim 1, characterized in that: The upper left side of the door frame (11) is provided with a motor compartment (17) for the motor (16) to be embedded and fixed. The motor compartment (17) contains a lithium battery (19) that supplies power to the motor (16).

6. An emergency door unlocking device according to claim 5, characterized in that: A Type-C charging port for charging the lithium battery (19) is installed on the rear end face of the motor compartment (17).

7. An emergency door unlocking device according to claim 1, characterized in that: The upper left side of the door frame (11) is provided with a rack receiving chamber (18) for the rack (111) to move upward. A magnet is fixed at the top of the inner cavity of the rack receiving chamber (18), and a magnetic sheet that is attracted to the magnet is fixed at the top of the rack (111).

8. An emergency door unlocking device according to claim 1, characterized in that: The push-button alarm (3) includes a housing, a push-button switch installed inside the housing, and a glass plate embedded in the rear surface of the housing. The push-button switch is electrically connected to a motor (16) and a lithium battery (19) via a wiring harness.

9. An emergency door unlocking device according to claim 8, characterized in that: The surface of the housing is coated with the words "Break to Unlock".

10. An emergency door unlocking device according to claim 1, characterized in that: Three headers (24) are fixed on the right side of the rear surface of the door leaf (21), and three door hinges (12) that are adapted to the headers (24) are fixed on the right side of the rear surface of the door frame (11), and the door leaf (21) is pulled back.

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