High-safety escape door lock

Abstract

The utility model relates to the technical field of escape door lock, propose a kind of high safety escape door lock, including two door frame lock catch and two door leaf lock tongue, the door leaf lock tongue is installed in the one side of door frame lock catch, the other end of the door leaf lock tongue is provided with the transmission mechanism for connecting transmission, two the door leaf lock tongue between jointly provided with door leaf unlocking device, the door leaf unlocking device is used for the safe unlocking of door leaf, the transmission mechanism is composed of connecting frame and two connecting shaft, by the setting request unlocking device of request unlocking device, self-locking motor and so on structure request unlocking device send the door opening request of operator to background verification, self-locking motor drives cam mechanism to complete unlocking after obtaining authorization, this double authentication mechanism both guarantees the rapid passage under emergency, and effectively prevents the random opening of unauthorised personnel, solves the problem of management and control mechanism deficiency and reliability deficiency in prior art.

Description

Technical Field

[0001] This utility model relates to the field of escape door lock technology, specifically, to a highly secure escape door lock. Background Technology

[0002] Currently, the emergency exit latches used in domestic subway cars are mainly mechanical. The main problems include: generally low reliability: they may jam or malfunction after severe vibrations or prolonged use, affecting emergency escape; and high maintenance costs: mechanical parts are prone to wear and tear, requiring regular inspection and replacement, impacting operational efficiency.

[0003] Current escape door locks on the market mainly rely on simple mechanical structures, which have drawbacks: I. Lack of safety management and control mechanisms: Traditional emergency exit locks use a purely mechanical design, allowing anyone inside the door to open it with a single action (pressing down a lever). While this indiscriminate opening mechanism is acceptable in ordinary office areas, it poses significant security risks in areas involving hazardous materials storage, critical equipment rooms, financial institutions, and specially controlled areas. Unauthorized personnel can freely enter and exit secure areas through these exits, creating a substantial management loophole in the access control system. This makes it impossible to achieve effective area isolation or track unusual entry and exit behavior.

[0004] II. Inadequate system reliability design: The mechanical transmission chains upon which existing products rely have significant vulnerabilities: First, linkage mechanisms are prone to developing clearances after prolonged use, leading to a decrease in transmission accuracy; second, metal components may corrode in humid environments and deform in environments with alternating high and low temperatures; third, in emergencies such as fires, high temperatures may cause the mechanism to expand and jam, and vibrations may cause component displacement. These factors can all cause a seemingly reliable mechanical system to completely fail at critical moments. More seriously, traditional designs lack fail-safe mechanisms; when the main transmission system fails, they cannot guarantee that the door lock will remain reliably locked, nor can they provide an effective emergency unlocking solution. Utility Model Content

[0005] This invention proposes a highly secure escape door lock, which solves the problems of insufficient control mechanism and insufficient reliability in related technologies.

[0006] The technical solution of this utility model is as follows: a high-security escape door lock, comprising two door frame latches and two door leaf latches, wherein the door leaf latches are installed on one side of the door frame latches; The other end of the door latch is provided with a transmission mechanism for connecting to the transmission. A door unlocking device is provided between the two door latches, and the door unlocking device is used for secure unlocking of the door.

[0007] As a preferred embodiment of this utility model, the transmission mechanism consists of a connecting frame and two connecting shafts. The connecting frame is disposed between the door leaf latch and the door leaf unlocking device. The two connecting shafts are symmetrically arranged and pass through both ends of the connecting frame. One end of each connecting shaft is fixedly connected to a double-ended connecting rod.

[0008] As a preferred embodiment of this utility model, the door unlocking device is composed of a cam, which is disposed between the two connecting frames, and a pull rod is fixedly connected to the top of the cam.

[0009] As a preferred embodiment of this utility model, both ends of the double-ended connecting rod are provided with hinge frames, and the four hinge frames are arranged symmetrically in pairs and are hinged to each other with the door leaf lock tongue and the door leaf unlocking device. The connecting shaft is threaded with a locking bolt.

[0010] As a preferred embodiment of this utility model, the door unlocking device further includes a self-locking motor, which is disposed on one side of the cam. A limit groove is provided inside the cam. A drive shaft is installed at the output end of the self-locking motor. A limit block is fixedly connected to the output end of the drive shaft. The limit block and the limit groove are in contact with each other.

[0011] As a preferred embodiment of this utility model, both ends of the limiting block are fixedly connected to a fixing plate.

[0012] The working principle and beneficial effects of this utility model are as follows: This invention utilizes a request unlocking device and a self-locking motor to send the operator's request to the backend for verification. After authorization, the self-locking motor drives the cam mechanism to unlock the door. This dual verification mechanism ensures rapid passage in emergencies while effectively preventing unauthorized personnel from opening the door at will.

[0013] This utility model incorporates an independent locking device and an independent unlocking device. The independent locking device automatically locks the door leaf latch when the transmission system fails, preventing accidental opening. The independent unlocking device can mechanically unlock the door when the main system completely fails, ensuring that the escape route remains usable under any extreme circumstances. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the transmission mechanism of this utility model; Figure 3 This is a schematic diagram of the overall structure of the cam of this utility model; Figure 4 This is a schematic diagram of the overall structure of the self-locking motor used in this application.

[0016] In the diagram: 100, door frame latch; 200. Door leaf latch; 300. Transmission mechanism; 301. Connecting frame; 302. Connecting shaft; 303. Double-ended connecting rod; 304. Hinge frame; 305. Locking bolt; 400. Door unlocking device; 401. Cam; 402. Pull rod; 403. Limiting groove; 404. Self-locking motor; 405. Drive shaft; 406. Limiting block; 407. Fixing plate. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0018] Example like Figures 1-4 As shown, a high-security escape door lock includes two door frame latches 100 and two door leaf latches 200, with the door leaf latches 200 installed on one side of the door frame latches 100; The other end of the door latch 200 is provided with a transmission mechanism 300 for connecting to the transmission. A door unlocking device 400 is provided between the two door latches 200, and the door unlocking device 400 is used for the secure unlocking of the door.

[0019] Specifically, a high-security escape door lock includes two door frame latches 100 and two door leaf latches 200. The door leaf latches 200 are installed on one side of the door frame latches 100 for mechanical locking of the door. A transmission mechanism 300 is located at the other end of each door leaf latch 200. The transmission mechanism 300 connects the two door leaf latches 200 via a linkage and hinge, achieving synchronous power transmission. A door leaf unlocking device 400 is shared between the two door leaf latches 200. As a core control unit, the door leaf unlocking device 400, through manual or electric operation of the transmission mechanism 300, disengages the door leaf latches 200 from the door frame latches 100, completing the safe unlocking. The principle is that in an emergency, when the user triggers the door leaf unlocking device 400, the transmission mechanism 300 evenly distributes force to the two door leaf latches 200, ensuring the door opens quickly and smoothly. The door frame latch 100 is equipped with an independent locking device, which uses a mechanical latch structure. When the door unlocking device 400 and the transmission mechanism 300 completely fail, it automatically locks the door latch 200 to prevent accidental ejection and ensure the door is tightly closed. Simultaneously, the door frame latch 100 also has an independent unlocking device. This unlocking device, operated manually or with a key, directly acts on the door frame latch 100 in the event of transmission failure, forcibly releasing the door latch 200 and opening the escape door. Both the door unlocking device 400 and the door frame latch unlocking device integrate a request unlocking device. This request unlocking device consists of a button and a signal module. The operator must press the request unlocking device to send a wireless signal to the backend system. After the backend system verifies authorization, it sends an approval signal, activating either the door unlocking device 400 or the door frame latch unlocking device, ensuring a controlled and safe unlocking process.

[0020] In this embodiment, the transmission mechanism 300 consists of a connecting frame 301 and two connecting shafts 302. The connecting frame 301 is located between the door leaf lock tongue 200 and the door leaf unlocking device 400. The two connecting shafts 302 are symmetrically arranged and pass through both ends of the connecting frame 301. One end of the connecting shaft 302 is fixedly connected to a double-ended connecting rod 303.

[0021] Specifically, the connecting frame 301 is positioned between the door latch 200 and the door unlocking device 400, serving as an intermediate transmission component. Two connecting shafts 302 are symmetrically arranged and pass through both ends of the connecting frame 301, forming a rigid connection structure. One end of each connecting shaft 302 is fixedly connected to a double-ended connecting rod 303, which converts the linear motion of the connecting shaft 302 into rotational or translational motion. The transmission principle is as follows: when the door unlocking device 400 activates after requesting authorization, force is transmitted through the connecting frame 301 to the connecting shaft 302. The connecting shaft 302 drives the double-ended connecting rod 303 to move, thereby driving the door latch 200 to retract or release synchronously. This transmission mechanism ensures the synchronicity of the door latch 200, but it also works in conjunction with the independent locking device of the door frame latch: if the transmission mechanism 300 fails, the independent locking device will maintain the latch position, while the independent unlocking device can bypass the transmission and operate directly.

[0022] In this embodiment, the door unlocking device 400 is composed of a cam 401, which is disposed between two connecting frames 301, and a pull rod 402 is fixedly connected to the top of the cam 401.

[0023] Specifically, cam 401 is positioned between two connecting frames 301, controlling the position of the connecting frames 301 through its eccentric profile. A pull rod 402 is fixedly connected to the top of cam 401, serving as a manual operation interface. The working principle is as follows: when the user operates pull rod 402, cam 401 rotates, its profile pushing the connecting frames 301 to move, which in turn drives the door leaf latch 200 to disengage from the door frame latch 100 via transmission mechanism 300. The design of cam 401 provides mechanical gain, making the unlocking process effortless and fast. The door leaf unlocking device 400 integrates a request unlocking device, which is linked to pull rod 402. The user must first send a request through the request unlocking device and obtain approval from the backend before pull rod 402 can be effectively pulled; otherwise, the mechanical locking mechanism will restrict the rotation of cam 401, ensuring that unlocking is impossible without authorization.

[0024] In this embodiment, both ends of the double-ended connecting rod 303 are provided with hinge frames 304. The four hinge frames 304 are arranged symmetrically in pairs and are hinged to each other with the door leaf lock tongue 200 and the door leaf unlocking device 400. The connecting shaft 302 is threaded with locking bolts 305.

[0025] Specifically, the four hinge frames 304 are arranged symmetrically in pairs, respectively hinged to the door latch 200 and the door unlocking device 400, forming a flexible universal connection structure. A locking bolt 305 is threaded onto the connecting shaft 302 to fix the relative position of the connecting shaft 302 and the connecting frame 301. The transmission principle is as follows: the hinge frames 304 allow each component to adapt to changes in angle during movement, preventing jamming caused by rigid connections; the locking bolts 305, through threaded fastening, ensure that the connecting shaft 302 does not loosen under vibration, thereby guaranteeing the stability and durability of the transmission mechanism 300. This design allows the transmission mechanism 300 to reliably transmit the force of the door unlocking device 400. However, if the transmission fails, the independent unlocking device of the door frame latch can bypass the hinge frames 304 and locking bolts 305 by directly operating the door frame latch 100 to achieve emergency unlocking.

[0026] In this embodiment, the door unlocking device 400 also includes a self-locking motor 404, which is disposed on one side of the cam 401. The cam 401 has a limit groove 403 inside. The output end of the self-locking motor 404 is equipped with a drive shaft 405, and the output end of the drive shaft 405 is fixedly connected to a limit block 406. The limit block 406 and the limit groove 403 fit together.

[0027] Specifically, the self-locking motor 404 is located on one side of the cam 401, serving as an electric drive source. The cam 401 has a limiting groove 403 inside, and a drive shaft 405 is mounted on the output end of the self-locking motor 404. A limiting block 406 is fixedly connected to the output end of the drive shaft 405. The limiting block 406 and the limiting groove 403 fit together, forming an interlocking transmission. The electrical principle is as follows: the self-locking motor 404 has a power-off self-locking function, meaning that when the motor stops, it can maintain its current position through an internal braking mechanism to prevent accidental triggering or external interference. The unlocking request device is electrically connected to the self-locking motor 404. After the operator sends a signal through the unlocking request device, the background system verifies and sends an approval signal, at which point the self-locking motor 404 is powered on and starts. The drive shaft 405 rotates, causing the limiting block 406 to move within the limiting groove 403, thereby driving the cam 401 to rotate and achieving electric unlocking. If the self-locking motor 404 or the unlocking request device fails, the independent unlocking device of the door frame latch can be manually operated in an emergency.

[0028] In this embodiment, both ends of the limiting block 406 are fixedly connected to a fixing plate 407.

[0029] Specifically, the fixing plate 407, as a reinforcing structure, is integrated with the limiting block 406 by welding or bolting. The working principle is as follows: the fixing plate 407 increases the contact area and rigidity of the limiting block 406, preventing deformation or wear during frequent movement; simultaneously, the fixing plate 407 ensures a tighter fit between the limiting block 406 and the limiting groove 403, reducing transmission backlash and improving the accuracy and response speed of the cam 401 drive. This reinforced design ensures that, after requesting approval from the unlocking device, the self-locking motor 404 can accurately and reliably drive the door unlocking device, avoiding unlocking failure due to component wear. The durability of the fixing plate 407, in conjunction with the independent locking device of the door frame latch, maintains the overall security of the door lock during long-term use.

[0030] Working principle: In the normal authorization unlocking process, the operator first needs to press the unlock request device integrated into the door unlocking device 400 or the door frame. The device's signal module wirelessly sends the unlock request to the backend system for authorization verification. After approval, an approval signal is sent back. If the electric mode is used, the self-locking motor 404 is powered on and started after receiving the signal. Its drive shaft 405 drives the limit block 406 to rotate. The limit block drives the cam 401 to rotate through the limit groove 403 that fits tightly with it. If the manual mode is used, the authorized user can directly pull the lever 402 to drive the cam to rotate. The eccentric profile of the cam then pushes the connecting frames 301 on both sides. The power is transmitted to the double-ended connecting rods 303 through the connecting shaft 302. Finally, through the flexible hinge formed by the hinge frame 304, the two door latches 200 are simultaneously pulled back smoothly from the door frame latch 100, realizing the smooth opening of the door. To ensure absolute safety, multiple backups are designed: when the transmission mechanism or door unlocking device fails, the independent locking device on the door frame latch 100 can mechanically lock the bolt to prevent accidental opening; and in case of emergency requiring forced opening, the independent unlocking device on the door frame latch, such as a manual wrench or key, can be used to directly act on the latch and forcibly release the bolt, thus ensuring the ultimate openability of the escape route under any malfunction.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-security escape door lock, comprising two door frame latches (100) and two door leaf latches (200), wherein the door leaf latches (200) are installed on one side of the door frame latches (100). Its characteristics are: The other end of the door latch (200) is provided with a transmission mechanism (300) for connecting to the transmission. A door unlocking device (400) is provided between the two door latches (200), and the door unlocking device (400) is used for the secure unlocking of the door.

2. The high-security escape door lock according to claim 1, characterized in that, The transmission mechanism (300) consists of a connecting frame (301) and two connecting shafts (302). The connecting frame (301) is located between the door leaf latch (200) and the door leaf unlocking device (400). The two connecting shafts (302) are symmetrically arranged and pass through both ends of the connecting frame (301). One end of the connecting shaft (302) is fixedly connected to a double-ended connecting rod (303).

3. The high-security escape door lock according to claim 2, characterized in that, The door unlocking device (400) consists of a cam (401), which is located between the two connecting frames (301), and a pull rod (402) is fixedly connected to the top of the cam (401).

4. The high-security escape door lock according to claim 3, characterized in that, Both ends of the double-ended connecting rod (303) are provided with hinge frames (304). The four hinge frames (304) are arranged symmetrically in pairs and are hinged to the door leaf lock tongue (200) and the door leaf unlocking device (400). The connecting shaft (302) is threaded with locking bolts (305).

5. A high-security escape door lock according to claim 4, characterized in that, The door unlocking device (400) also includes a self-locking motor (404), which is disposed on one side of the cam (401). The cam (401) has a limiting groove (403) inside. A drive shaft (405) is installed at the output end of the self-locking motor (404). A limiting block (406) is fixedly connected to the output end of the drive shaft (405). The limiting block (406) fits into the limiting groove (403).

6. A high-security escape door lock according to claim 5, characterized in that, Both ends of the limiting block (406) are fixedly connected to fixing plates (407).

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