Multi-point escape door lock

Abstract

The utility model discloses a kind of multipoint escape door locks, including main lock assembly, auxiliary lock assembly and unlocking assembly, main lock assembly includes main lock tongue, main lock shell.Auxiliary lock assembly is connected above or below main lock assembly, including auxiliary lock shell, auxiliary lock tongue and driven rod.Unlocking assembly includes driving handle, driving bevel gear, driven bevel gear, driven assembly, linkage gear and main lock rod, one end of main lock rod is connected main lock tongue, one end of driving handle is rotatably connected with the side of main lock shell away from main lock tongue, driving bevel gear is located in main lock shell, and is fixedly connected with driving handle, driven bevel gear is rotatably connected with main lock shell, and is engaged with driving bevel gear, driven assembly includes driven gear plate, driven gear plate is connected with driven bevel gear, linkage gear is engaged with driven gear plate, driven rod is connected with first driven gear rod, main lock rod, first driven gear rod are all provided with the driven gear of engagement with linkage gear.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, and in particular to a multi-point escape door lock. Background Technology

[0002] Traditional multi-point escape door locks often pose obvious safety hazards. In emergency escape situations, if any lock tongue malfunctions, such as jamming or damage, the door cannot be opened normally, seriously affecting the escape efficiency of personnel and may even endanger lives. The linkage between the various lock tongues is complex, and the unlocking operation is not convenient. It is necessary to operate different lock tongues separately to open the door, which is also not conducive to rapid escape in emergency situations. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a multi-point escape door lock that optimizes the linkage between various components, enabling synchronous unlocking of the main bolt and the auxiliary bolt, thereby allowing the door to be opened quickly and safely during an emergency escape, improving escape efficiency.

[0004] A multi-point escape door lock according to a first aspect of the present invention includes a main lock assembly, a secondary lock assembly, and an unlocking assembly. The main lock assembly includes a main bolt and a main lock housing. The main bolt is movably connected to the main lock housing and partially extends out of the main lock housing. The secondary lock assembly is connected above or below the main lock assembly. The secondary lock assembly includes a secondary lock housing, a secondary bolt, and a driven rod. The secondary bolt is movably connected to the secondary lock housing, the driven rod is connected to the secondary bolt, and the driven rod is slidably connected to the secondary lock housing. The unlocking assembly includes a drive handle, a drive bevel gear, a driven bevel gear, a driven component, a linkage gear, and a main locking rod. One end of the main locking rod is connected to the main locking bolt. One end of the drive handle is rotatably connected to the side of the main lock housing opposite to the main locking bolt. The drive bevel gear is located inside the main lock housing and is fixedly connected to the drive handle. The driven bevel gear is rotatably connected to the main lock housing and meshes with the drive bevel gear. The driven component includes a driven gear plate, and the driven gear plate engages with the driven bevel gear. The wheels are connected, the linkage gear meshes with the driven gear plate, the driven rod is connected with a first driven gear, the main lock rod and the first driven gear are both provided with driven teeth that mesh with the linkage gear, the drive handle rotates, the drive bevel gear drives the driven bevel gear to rotate, so that the driven gear plate swings, driving the linkage gear to rotate, the linkage gear drives the main lock rod and the first driven gear to move toward the main lock housing, so that the main lock tongue and the auxiliary lock tongue retract synchronously and unlock synchronously.

[0005] The multi-point escape door lock according to this utility model embodiment has at least the following beneficial effects: Through the linkage between the drive handle, drive bevel gear, driven bevel gear, driven toothed plate, linkage gear, main lock rod, and first driven toothed rod, the synchronous retraction of the main and auxiliary lock tongues is achieved, enabling door unlocking in a short time and greatly improving escape efficiency. The entire unlocking process can be completed simply by turning the drive handle, making operation simple and easy to understand. Even in emergencies, personnel can operate quickly and accurately, avoiding delays caused by complex operations. Furthermore, the multi-point locking structure enhances the door's locking stability, effectively preventing unauthorized opening during daily use. In emergency escape situations, it can be quickly unlocked, ensuring the safety of personnel.

[0006] According to some embodiments of this utility model, there are two secondary lock components, located above and below the main lock component respectively, and the unlocking component can simultaneously unlock the secondary lock tongues and the main lock tongue of the two secondary lock components.

[0007] According to some embodiments of the present invention, the driven assembly further includes a second driven rack, which is connected to the driven rod located above it. The second driven rack is stacked with the driven gear plate, and the linkage gear meshes with the first driven rack, the main locking rod, and the second driven rack respectively.

[0008] According to some embodiments of the present invention, the driven toothed plate is fan-shaped, the narrow part of the driven toothed plate is connected to the driven bevel gear, and its wide part is toothed and meshes with the linkage gear.

[0009] According to some embodiments of the present invention, the main lock housing is provided with a first guide post. The first guide post is located on the other side of the first driven rack facing away from the linkage gear. The side of the first guide post is connected to the first driven rack to guide the first driven rack to move toward the inside of the main lock housing, thereby guiding the secondary lock tongue located below to retract.

[0010] According to some embodiments of the present invention, the main lock housing is provided with two second guide posts, and a guide groove is formed between the two second guide posts. The second driven tooth is disposed through the guide groove, and the two second guide posts abut against the two sides of the second driven tooth respectively, so as to guide the second driven tooth to move toward the inside of the main lock housing, thereby guiding the secondary lock tongue located above to retract.

[0011] According to some embodiments of the present invention, the main lock housing is provided with a limiting protrusion, which is located on the upper side of the second driven gear. The limiting protrusion can abut against the top of the second driven gear to limit the transitional displacement of the second driven gear to disengage from the linkage gear.

[0012] According to some embodiments of the present invention, the secondary lock assembly further includes a return spring, one end of which is connected to the main lock housing and the other end is connected to the driven rod, for driving the secondary lock tongue to spring back and reset.

[0013] According to some embodiments of this utility model, the drive bevel gear is provided with a reset torsion spring, which is used to drive the drive handle to rotate downwards and then reset.

[0014] According to some embodiments of the present invention, the drive handle includes a pressure rod and a rocker arm. The rocker arm is disposed on the main lock housing in an inclined upward position and is connected to the drive bevel gear. One end of the pressure rod is connected to the end of the rocker arm away from the main lock housing, and the other end is hinged to the door panel.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of a multi-point escape door lock according to an embodiment of the present utility model; Figure 2 This is a partially enlarged schematic diagram of the main lock assembly of the multi-point escape door lock according to an embodiment of the present utility model; Figure 3 This is a partially exploded view of the unlocking component of the multi-point escape door lock according to an embodiment of the present invention.

[0017] Reference numerals: Main lock assembly 100; Main lock housing 110; Main lock tongue 120; Main lock rod 121; First guide post 130; Second guide post 140; Guide groove 141; Limiting protrusion 150; Secondary lock assembly 200; Secondary lock housing 210; Secondary lock tongue 220; Driven rod 230; Return spring 240; Unlocking assembly 300; Drive handle 310; Pressure rod 311; Rocker arm 312; Drive bevel gear 320; Return torsion spring 321; Driven bevel gear 330; Driven gear plate 340; First driven gear 350; Second driven gear 360; Linkage gear 370. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationships based on the directional or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] Reference Figure 1 , Figure 2 and Figure 3 This utility model proposes a multi-point escape door lock, which mainly consists of three parts: a main lock assembly 100, a secondary lock assembly 200, and an unlocking assembly 300.

[0023] Specifically, the main lock assembly 100 includes a main bolt 120 and a main lock housing 110. The main bolt 120 is movably connected to the main lock housing 110 and partially extends out of the main lock housing 110, used to fix the door to the door frame in the locked state. The main bolt 120 can extend and retract within the main lock housing 110 to lock and unlock the door. The secondary lock assembly 200 is connected above or below the main lock assembly 100. The secondary lock assembly 200 consists of a secondary lock housing 210, a secondary bolt 220, and a driven rod 230. The secondary bolt 220 is movably connected to the secondary lock housing 210 and can extend and retract. The driven rod 230 is connected to the secondary bolt 220 and slidably connected to the secondary lock housing 210; the sliding of the driven rod 230 can drive the extension and retraction of the secondary bolt 220.

[0024] The unlocking assembly 300 includes a drive handle 310, a drive bevel gear 320, a driven bevel gear 330, a driven component, a linkage gear 370, and a main locking rod 121. One end of the main locking rod 121 is connected to the main locking tongue 120 and is used to drive the main locking tongue 120 to extend and retract. One end of the drive handle 310 is rotatably connected to the side of the main lock housing 110 opposite to the main locking tongue 120, serving as the drive component for the unlocking operation. The drive bevel gear 320 is located inside the main lock housing 110 and is fixedly connected to the drive handle 310. When the drive handle 310 rotates, it drives the drive bevel gear 320 to rotate synchronously. The driven bevel gear 330 is rotatably connected to the main lock housing 110 and meshes with the drive bevel gear 320. Driven by the drive bevel gear 320, the driven bevel gear 330 rotates accordingly. The driven assembly includes a driven gear plate 340, which is connected to a driven bevel gear 330. Rotation of the driven bevel gear 330 causes the driven gear plate 340 to oscillate. A linkage gear 370 meshes with the driven gear plate 340, and the oscillation of the driven gear plate 340 drives the linkage gear 370 to rotate. A driven rod 230 is connected to a first driven rack 350. Both the main locking rod 121 and the first driven rack 350 are provided with driven teeth that mesh with the linkage gear 370.

[0025] In a specific embodiment, when unlocking for escape is required, the drive handle 310 is rotated. Since the drive handle 310 is fixedly connected to the drive bevel gear 320, the rotation of the drive handle 310 will cause the drive bevel gear 320 to rotate synchronously. Because the drive bevel gear 320 meshes with the driven bevel gear 330, the rotation of the drive bevel gear 320 will cause the driven bevel gear 330 to rotate accordingly. The driven bevel gear 330 is connected to the driven gear plate 340, and the rotation of the driven bevel gear 330 will cause the driven gear plate 340 to swing. The driven gear plate 340 meshes with the linkage gear 370, and the swing of the driven gear plate 340 will drive the linkage gear 370 to rotate. The linkage gear 370 also meshes with the driven teeth on the main locking rod 121 and the driven teeth on the first driven gear 350. The rotation of the linkage gear 370 will cause the main locking rod 121 and the first driven gear 350 to move towards the main lock housing 110. The main locking rod 121 is connected to the main locking tongue 120, and the first driven toothed rod 350 is connected to the secondary locking tongue 220 through the driven rod 230. Therefore, the displacement of the main locking rod 121 and the first driven toothed rod 350 will drive the main locking tongue 120 and the secondary locking tongue 220 to retract synchronously, thereby realizing the synchronous unlocking of the door.

[0026] The following specific embodiment further illustrates the working process of the multi-point escape door lock of this utility model. Assume that the multi-point escape door lock is installed on the emergency exit door of a shopping mall. Under normal circumstances, the door is locked, with the main latch 120 and the secondary latch 220 extending into the corresponding lock holes in the door frame, firmly fixing the door to the door frame. In the event of an emergency such as a fire in the shopping mall, requiring rapid escape, the escaping person only needs to grasp the drive handle 310 and turn it. The rotation of the drive handle 310 drives the drive bevel gear 320 to rotate, and the rotation of the drive bevel gear 320 causes the driven bevel gear 330, which meshes with it, to also begin to rotate. The rotation of the driven bevel gear 330 causes the driven gear plate 340 to swing, and the swing of the driven gear plate 340 causes the linkage gear 370 to rotate. The rotation of the linkage gear 370 drives the main locking rod 121 and the first driven rack 350 to move towards the main lock housing 110. The main locking rod 121 drives the main bolt 120 to retract into the main lock housing 110, and the first driven rack 350 drives the secondary bolt 220 to retract into the secondary lock housing 210 via the driven rod 230. At this time, the main bolt 120 and the secondary bolt 220 simultaneously exit from the lock hole of the door frame, and the door can be opened smoothly, allowing personnel to quickly escape through the safety exit.

[0027] Understandably, the linkage between the drive handle 310, drive bevel gear 320, driven bevel gear 330, driven gear plate 340, linkage gear 370, main locking rod 121, and first driven gear 350 enables the synchronous retraction of the main locking tongue 120 and the secondary locking tongue 220, allowing the door to be unlocked quickly and significantly improving escape efficiency. The entire unlocking process can be completed simply by turning the drive handle 310, making it simple and easy to understand. Even in emergencies, personnel can operate quickly and accurately, avoiding delays caused by complex operations. Furthermore, the multi-point locking structure enhances the door's locking stability, effectively preventing unauthorized opening during daily use. In emergency escapes, it allows for rapid unlocking, ensuring the safety of personnel.

[0028] Reference Figure 1 In this embodiment of the invention, two secondary lock components 200 are provided, located above and below the main lock component 100, respectively. The unlocking component 300 can simultaneously unlock the secondary lock tongues 220 and the main lock tongue 120 of both secondary lock components 200. Specifically, the main lock component 100 is installed at a suitable position in the middle of the door body, and its interior contains the main lock tongue 120 and the main lock rod 121 connected to the main lock tongue 120, etc. The two secondary lock components 200 are respectively installed above and below the main lock component 100, and each secondary lock component 200 includes a secondary lock tongue 220, a driven rod 230, etc. The unlocking component 300 mainly consists of a drive handle 310, a drive bevel gear 320, a driven bevel gear 330, a driven gear plate 340, a linkage gear 370, and a first driven gear 350.

[0029] When the drive handle 310 is rotated, it drives the drive bevel gear 320 to rotate. The drive bevel gear 320 meshes with the driven bevel gear 330, causing the driven bevel gear 330 to rotate, which in turn drives the driven gear plate 340 to swing. The driven gear plate 340 meshes with the linkage gear 370, which in turn meshes with the first driven rack 350, the main locking rod 121, and a hypothetical component connected to the upper secondary locking assembly 200. Thus, when the linkage gear 370 rotates, it simultaneously drives the first driven rack 350 and the main locking rod 121 to move. The first driven rack 350, through the driven rod 230 of the lower secondary locking assembly 200, drives the lower secondary locking tongue 220 to retract. The main locking rod 121 drives the main locking tongue 120 to retract. At the same time, the hypothetical second driven rack 360 drives the upper secondary locking tongue 220 to retract, achieving synchronous unlocking of the three locking tongues. By setting two auxiliary lock components 200 located above and below the main lock component 100 respectively, and enabling the unlocking component 300 to simultaneously unlock all bolts, the overall locking strength of the door lock is enhanced. In daily use, this effectively prevents the door from being illegally pushed open, improving security. In emergency escape situations, a single operation unlocks all bolts, significantly reducing opening time and buying valuable time for escape, thus improving escape efficiency.

[0030] Furthermore, referring to Figure 1 and Figure 2 A second driven rack 360 is added to the driven assembly. The second driven rack 360 is fixedly connected to the driven rod 230 located above, and the second driven rack 360 is placed in an overlapping state with the driven gear plate 340. The linkage gear 370 is in a suitable position and meshes with the first driven rack 350, the main locking rod 121, and the second driven rack 360 respectively. When the drive handle 310 rotates, it drives the drive bevel gear 320 to rotate, thereby causing the driven bevel gear 330 and the driven gear plate 340 to move sequentially. The driven gear plate 340 swings, causing the linkage gear 370 to rotate, and the linkage gear 370 simultaneously drives the first driven rack 350, the main locking rod 121, and the second driven rack 360 to move towards the inside of the main lock housing 110. The first driven rack 350 retracts the lower secondary latch 220 via the lower driven rack 230, and the main lock rod 121 retracts the main latch 120. The second driven rack 360 retracts the upper secondary latch 220 via the upper driven rack 230, completing the synchronous unlocking of the three latches. The addition of the second driven rack 360, which overlaps with the driven rack plate 340, optimizes the transmission structure. The linkage gear 370 meshes with multiple components simultaneously, achieving more efficient transmission and enabling the three latches to retract more precisely and synchronously. This reduces energy loss and errors during transmission, improves the reliability and stability of unlocking, and ensures the door lock functions normally in emergencies.

[0031] Reference Figure 2It should be noted that the driven gear plate 340 is designed in a fan shape. Its narrow section is connected to the driven bevel gear 330 through a suitable connection method, while its wide section is machined into a tooth shape and meshes with the linkage gear 370. When the drive handle 310 rotates, triggering a series of transmissions, the driven bevel gear 330 drives the fan-shaped driven gear plate 340 to swing. Due to the fan-shaped structural characteristics of the driven gear plate 340, during the swinging process, the toothed part of its wide section can stably mesh with the linkage gear 370 for transmission. The linkage gear 370 then transmits power to the first driven rack 350, the main locking rod 121, and the second driven rack 360, causing the main locking tongue 120 and the two auxiliary locking tongues 220 to retract synchronously. Designing the driven gear plate 340 in a fan shape, with its narrow section connected to the driven bevel gear 330 for easy power reception and swinging, and its wide section toothed and meshing with the linkage gear 370, increases the meshing area. This makes the transmission smoother and more reliable, reduces shaking and jamming during the transmission process, reduces component wear, improves the stability and durability of the entire unlocking system, and extends the service life of the door lock.

[0032] Reference Figure 2 In some embodiments, a first guide post 130 is provided on the main lock housing 110, located on the side of the first driven rack 350 opposite to the linkage gear 370. When the drive handle 310 rotates, causing the first driven rack 350 to move towards the inside of the main lock housing 110 via transmission, the side of the first guide post 130 contacts and abuts against the first driven rack 350. Under the combined action of the driving force of the linkage gear 370 and the guiding force of the first guide post 130, the first driven rack 350 moves stably along a predetermined direction. The first driven rack 350 drives the lower secondary lock tongue 220 to accurately retract into the secondary lock housing 210 via the lower driven rod 230.

[0033] Furthermore, two second guide posts 140 are provided on the main lock housing 110, forming a guide groove 141 between the two second guide posts 140, and a second driven rack 360 is disposed through the guide groove 141. When the drive handle 310 rotates, triggering the transmission and causing the second driven rack 360 to move toward the inside of the main lock housing 110, the two second guide posts 140 respectively contact and abut against the two sides of the second driven rack 360. The second driven rack 360 moves stably within the guide groove 141 along the guiding direction of the two second guide posts 140, thereby driving the upper driven rod 230 to accurately retract the upper secondary lock tongue 220 into the secondary lock housing 210.

[0034] Understandably, the first guide post 130 provides precise guidance for the first driven rack 350. During unlocking, it ensures that the first driven rack 350 moves along the correct trajectory, preventing unlocking failure or component damage due to movement deviation. This improves the accuracy and reliability of the lower secondary latch 220 retraction, ensuring the normal operation of the entire door lock system in emergency situations and enhancing the performance stability of the door lock. Meanwhile, the guide groove 141 formed by the two second guide posts 140 effectively constrains and guides the second driven rack 360. During unlocking, it prevents the second driven rack 360 from deviating or wobbling, ensuring it moves accurately along a straight line, thereby guaranteeing the smooth and accurate retraction of the upper secondary latch 220. This improves the stability and reliability of the upper secondary latch 220 unlocking, making the door lock's unlocking action more precise.

[0035] Reference Figure 2 A limiting protrusion 150 is provided on the main lock housing 110, located above the second driven rack 360. When the drive handle 310 rotates, causing the second driven rack 360 to move towards the inside of the main lock housing 110 via transmission, as the second driven rack 360 moves, when its top approaches the limiting protrusion 150, the limiting protrusion 150 contacts and abuts against the top of the second driven rack 360, preventing the second driven rack 360 from continuing to displace excessively. This prevents the second driven rack 360 from disengaging from the linkage gear 370, ensuring the normal operation of the transmission system. It is easy to understand that the limiting protrusion 150 plays a crucial protective role. During unlocking, it limits the displacement range of the second driven rack 360, preventing disengagement from the linkage gear 370 due to excessive displacement, thus ensuring the continuity and stability of the transmission system. It prevents unlocking failure caused by component disengagement, improving the reliability and safety of the entire door lock system in emergency situations.

[0036] Reference Figure 1A return spring 240 is provided in the secondary lock assembly 200. One end of the return spring 240 is fixed to the main lock housing 110 through a suitable connection method, and the other end is connected to the driven rod 230. When the door is in the locked state, the return spring 240 is in a certain stretched or compressed state. When the secondary latch 220 is retracted by the unlocking assembly 300 to achieve unlocking, the drive handle 310 is released. The elastic force of the return spring 240 will drive the driven rod 230 to move, and the driven rod 230 will then drive the secondary latch 220 to spring back and reset, so that the secondary latch 220 re-extends from the secondary lock housing 210 and returns to the locked position. The setting of the return spring 240 realizes the automatic reset function of the secondary latch 220. In daily use, there is no need to manually reset the secondary latch 220 after each unlocking, saving time and manpower. At the same time, it ensures that the door can automatically be locked after closing, improving the security and convenience of the door lock and reducing the safety hazards caused by forgetting to reset.

[0037] Reference Figure 3 A return torsion spring 321 is installed on the drive bevel gear 320. One end of the return torsion spring 321 is fixed to the drive bevel gear 320 or a related structure, and the other end is fixed to the main lock housing 110 or other suitable location. When the operator rotates the drive handle 310 to unlock, the drive handle 310 drives the drive bevel gear 320 to rotate, and the return torsion spring 321 is torsionally charged to store energy. After unlocking is completed and the operator releases the drive handle 310, the elastic force of the return torsion spring 321 will drive the drive bevel gear 320 to rotate in the opposite direction, thereby automatically returning the drive handle 310 to its initial position, preparing for the next unlocking operation. The setting of the return torsion spring 321 enables the drive handle 310 to automatically reset, improving the convenience of use. After unlocking, the operator does not need to manually reset the drive handle 310, reducing the number of operation steps. At the same time, it ensures that the drive bevel gear 320 is always in the correct initial position, which is conducive to the accurate transmission of the transmission system during the next unlocking, improving the stability and reliability of the entire door lock system.

[0038] Reference Figure 1 It should be noted that the drive handle 310 consists of a pressure rod 311 and a rocker arm 312. The rocker arm 312 is inclined upward and is mounted on the main lock housing 110 through a suitable connection method, and the rocker arm 312 is connected to the drive bevel gear 320. One end of the pressure rod 311 is fixedly connected to the end of the rocker arm 312 away from the main lock housing 110 through a connector, and the other end is hinged to the door panel through a hinge shaft.

[0039] When unlocking is required, the operator presses down on the lever 311. The lever 311 drives the rocker arm 312 to rotate around its connection point with the main lock housing 110. The rocker arm 312 then drives the drive bevel gear 320 to rotate, triggering subsequent transmission that retracts the bolt and unlocks the door. After unlocking, the lever 311 is released, and under the action of the return torsion spring 321 or other reset mechanism, the lever 311 and rocker arm 312 return to their initial positions. This ergonomic design of the drive handle 310, with its upward-sloping rocker arm 312, makes it easier and more comfortable for the operator to press the lever 311. The hinged design of the lever 311 to the door panel increases operational flexibility, making it convenient for people of different heights and operating habits. This improves the ease of operation of the door lock in emergencies, ensuring that personnel can quickly and effectively unlock the door, buying time for escape.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A multi-point escape door lock, characterized in that, include: The main lock assembly includes a main bolt and a main lock housing, wherein the main bolt is movably connected to the main lock housing and extends partially out of the main lock housing; A secondary lock assembly is connected above or below the primary lock assembly. The secondary lock assembly includes a secondary lock housing, a secondary bolt, and a driven rod. The secondary bolt is movably connected to the secondary lock housing, and the driven rod is connected to the secondary bolt and slidably connected to the secondary lock housing. The unlocking assembly includes a drive handle, a drive bevel gear, a driven bevel gear, a driven component, a linkage gear, and a main locking rod. One end of the main locking rod is connected to the main locking bolt. One end of the drive handle is rotatably connected to the side of the main lock housing opposite to the main locking bolt. The drive bevel gear is located inside the main lock housing and is fixedly connected to the drive handle. The driven bevel gear is rotatably connected to the main lock housing and meshes with the drive bevel gear. The driven component includes a driven gear plate, and the driven gear plate engages with the driven bevel gear. The linkage gear is connected to the driven gear plate, and the driven rod is connected to the first driven gear. The main lock rod and the first driven gear are both provided with driven teeth that mesh with the linkage gear. When the drive handle is rotated, the drive bevel gear drives the driven bevel gear to rotate, so that the driven gear plate swings and drives the linkage gear to rotate. The linkage gear drives the main lock rod and the first driven gear to move toward the main lock housing, so that the main lock tongue and the auxiliary lock tongue retract and unlock synchronously.

2. The multi-point escape door lock according to claim 1, characterized in that, There are two secondary lock components, located above and below the main lock component respectively. The unlocking component can simultaneously unlock the secondary bolts of the two secondary lock components as well as the main bolt.

3. The multi-point escape door lock according to claim 2, characterized in that, The driven assembly further includes a second driven rack, which is connected to the driven rod located above it. The second driven rack is stacked with the driven gear plate, and the linkage gear meshes with the first driven rack, the main locking rod, and the second driven rack respectively.

4. The multi-point escape door lock according to claim 3, characterized in that, The driven gear plate is fan-shaped, with its narrow portion connected to the driven bevel gear, and its wide portion being toothed and meshing with the linkage gear.

5. The multi-point escape door lock according to claim 3, characterized in that, The main lock housing is provided with a first guide post, which is located on the other side of the first driven rack facing away from the linkage gear. The side of the first guide post is connected to the first driven rack to guide the first driven rack to move toward the inside of the main lock housing, thereby guiding the secondary lock tongue located below to retract.

6. The multi-point escape door lock according to claim 3, characterized in that, The main lock housing is provided with two second guide posts, and a guide groove is formed between the two second guide posts. The second driven tooth is disposed through the guide groove. The two second guide posts abut against the two sides of the second driven tooth respectively to guide the second driven tooth to move toward the inside of the main lock housing, thereby guiding the secondary lock tongue located above to retract.

7. The multi-point escape door lock according to claim 6, characterized in that, The main lock housing is provided with a limiting protrusion, which is located on the upper side of the second driven gear. The limiting protrusion can abut against the top of the second driven gear to limit the transition displacement of the second driven gear to disengage from the linkage gear.

8. The multi-point escape door lock according to claim 1, characterized in that, The secondary lock assembly also includes a return spring, one end of which is connected to the main lock housing and the other end is connected to the driven rod, for driving the secondary lock tongue to spring back to its original position.

9. The multi-point escape door lock according to claim 1, characterized in that, The drive bevel gear is equipped with a reset torsion spring, which is used to reset the drive handle after it is pressed down and rotated.

10. The multi-point escape door lock according to claim 1, characterized in that, The drive handle includes a pressure rod and a rocker arm. The rocker arm is mounted on the main lock housing at an upward angle and is connected to the drive bevel gear. One end of the pressure rod is connected to the end of the rocker arm away from the main lock housing, and the other end is hinged to the door panel.

Images