Door lock linkage system and platform door

Abstract

The application relates to the technical field of rail transit equipment, in particular to a door lock linkage system and a platform door. The door lock linkage system comprises a main body frame, a left sliding door assembly and a right sliding door assembly, the latter two are located on the two sides of the main body frame and realize synchronous movement relative to the main body frame through a transmission mechanism. The main body frame is provided with a first door lock device for limiting the left sliding door assembly and a second door lock device for limiting the movement of the main body frame; the second door lock device is connected with a trigger type unlocking device on the movement path of the right sliding door assembly. At least one of the left sliding door assembly and the right sliding door assembly is provided with an unlocking device which is in transmission connection with the first door lock device and drives the first door lock device to be released from the limitation when being pressed, drives the right sliding door assembly to move synchronously through the transmission mechanism, and triggers the trigger type unlocking device to unlock the second door lock device in the movement of the right sliding door assembly, so as to solve the unlocking asynchronous problem caused by traditional independent control.

Description

Technical Field

[0001] This application relates to the field of rail transit equipment technology, and in particular to a door lock linkage system and platform screen door. Background Technology

[0002] In scenarios such as rail transit, the new high-speed rail platform screen door system includes a left sliding door, a right sliding door, and a main door frame that supports the door structure. The coordinated unlocking and movement of these three components are crucial for ensuring operational safety and emergency escape efficiency. However, the existing platform screen door lock design has significant flaws: the locks of the left and right sliding doors and the main door frame are mostly independent control structures, lacking an effective linkage mechanism. When unlocking is required, it is often necessary to operate the locks of the left door, right door, and main door frame separately. This is not only cumbersome and time-consuming, but also prone to obstructing door movement due to asynchronous operations. For example, the left door may be unlocked while the right door or main door frame remains locked, causing excessive local stress on the door, leading to structural deformation or jamming during opening and closing.

[0003] While some improved solutions attempt to simplify operation, they can only achieve simultaneous unlocking of the left and right sliding doors, failing to activate the locking device of the main door frame. This leaves the main door frame still restricted, preventing the entire door from moving smoothly. Another solution connects the three components through a complex electrical control system, but this method relies on stable power supply and precise control logic. In the event of a power outage, circuit fault, or program error, the linkage is prone to failure, causing the unlocking actions of the left and right doors and the main door frame to become disconnected. This not only affects normal passage but also obstructs evacuation routes in emergencies, posing a serious safety hazard. Therefore, existing technology cannot meet the requirement of simultaneous unlocking of the left and right sliding doors and the main door frame, necessitating a door lock system that can achieve orderly linkage among the three components. Utility Model Content

[0004] The purpose of this application is to provide a door lock linkage system to solve the problem in the prior art that the left sliding door, right sliding door and main door frame cannot be unlocked synchronously.

[0005] To achieve the above objectives, this application provides the following technical solution: In a first aspect, a platform door lock linkage system includes a main frame, a left sliding door assembly and a right sliding door assembly, wherein the left sliding door assembly and the right sliding door assembly are respectively disposed on both sides of the main frame and are connected by a transmission mechanism to achieve synchronous movement relative to the main frame; The main frame is provided with a first door lock device for restricting the left sliding door assembly and a second door lock device for restricting the movement of the main frame. The second door lock device is connected to a trigger-type unlocking device located on the moving path of the right sliding door assembly; The left sliding door assembly and / or the right sliding door assembly are provided with an unlocking device. The unlocking device is connected to the first door lock device. When the unlocking device is pressed, it drives the first door lock device to release the movement restriction on the left sliding door assembly and drives the right sliding door assembly to move synchronously through the transmission mechanism. During the movement of the right sliding door assembly, the trigger-type unlocking device is triggered to unlock the second door lock device.

[0006] Furthermore, the unlocking device includes a left door unlocking device; The left door unlocking device includes a force-applying rod, a crank connected to the force-applying rod, a first connecting rod connected to the other end of the crank, a first connecting rod movably connected to one end of a second connecting rod, an actuating rod connected to the other end of the second connecting rod, and an unlocking cable connected to the other end of the actuating rod.

[0007] Furthermore, the left sliding door assembly includes a door frame having a groove for mounting the force-applying rod.

[0008] Furthermore, the first door lock device includes a cable seat for the passage of the unlocking cable, a bent connector connected to the other end of the unlocking cable, a first return spring disposed between the bent connector and the unlocking cable, and a hook-shaped locking member pulsatorically connected to the other end of the bent connector and used to lock a locking pin disposed on the main frame.

[0009] Furthermore, the trigger-type unlocking device includes a connecting base and a trigger moving rod that moves axially within the connecting base; It also includes a trigger lever located at the end of the trigger moving rod, the trigger lever being connected to the second door lock device.

[0010] Furthermore, the trigger-type unlocking device also includes a third reset spring, which is disposed on the outer periphery of the trigger moving rod, with one end abutting against the limiting member on the trigger moving rod and the other end abutting against the inner wall of the connecting seat.

[0011] Furthermore, the second door lock device includes a drive motor for driving the main door frame to move. The output shaft of the drive motor is connected to a friction plate that abuts against the output shaft in the locked state to restrict the rotation of the output shaft, thereby restricting the movement of the main frame. The friction plate is connected to the bifurcated end of the trigger lever. When the trigger lever is pressed, it separates the friction plate from the output shaft.

[0012] Furthermore, the trigger-activated unlocking device is located in the area near the right sliding door assembly.

[0013] Furthermore, the transmission mechanism is a synchronous belt transmission assembly, including a driving pulley and a driven pulley connected to a motor, and a synchronous belt wound between the driving pulley and the driven pulley. One end of the synchronous belt is connected to the left sliding door assembly, and the other end is connected to the right sliding door assembly.

[0014] In addition, a platform screen door is proposed, including the aforementioned platform screen door lock linkage system.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art: This application provides a platform door lock linkage system, including a main frame, a left sliding door assembly, and a right sliding door assembly. The left and right sliding door assemblies are respectively disposed on both sides of the main frame and connected by a transmission mechanism to achieve synchronous movement relative to the main frame. The main frame is provided with a first door lock device for restricting the movement of the left sliding door assembly and a second door lock device for restricting the movement of the main frame. The second door lock device is connected to a trigger-type unlocking device located on the movement path of the right sliding door assembly. The left and / or right sliding door assemblies are provided with unlocking devices, which are drivenly connected to the first door lock device. When the unlocking device is pressed, it drives the first door lock device to release the movement restriction on the left sliding door assembly and drives the right sliding door assembly to move synchronously through the transmission mechanism. During the movement of the right sliding door assembly, the trigger-type unlocking device is triggered to unlock the second door lock device. Specifically, the transmission mechanism enables the left and right sliding door components to move synchronously. Combined with the linkage design of the first door lock device, the second door lock device, and the trigger-type unlocking device, a complete collaborative unlocking mechanism is constructed, allowing the three to cooperate in an orderly manner during the unlocking process, avoiding the asynchronous unlocking situation caused by independent control in traditional technology. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is an external structural diagram of the door lock linkage system provided in the embodiments of this application; Figure 2 This is an external structural diagram of the transmission mechanism provided in the embodiments of this application; Figure 3 A schematic diagram showing the location of the unlocking device provided in the embodiments of this application; Figure 4 A diagram illustrating the linkage structure of the left door unlocking device and the first door lock device provided in this embodiment of the application; Figure 5 A linkage structure diagram of the right door unlocking device and the right unlocking auxiliary device provided in the embodiments of this application; Figure 6 This is a structural diagram of the trigger-type unlocking device provided in an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Main frame; 11. Locking pin; 2. Left sliding door assembly; 21. Door frame; 212. Groove; 3. Right sliding door assembly; 4. Transmission mechanism; 41. Drive wheel; 42. Driven wheel; 43. Synchronous belt; 5. First door lock device; 51. Cable seat; 52. Bending connector; 53. First return spring; 54. Hook-shaped locking element; 6. Second door lock device; 61. Output shaft of drive motor; 62. Friction plate; 63. Linkage mechanism; 631. Bifurcation end; 632. Force-bearing end; 7. Trigger-type unlocking device; 71. Connecting seat; 72. Trigger moving rod; 73. Trigger lever; 731. Bifurcation end; 74. Third return spring; 8. Unlocking device; 81a. Left door unlocking device; 81b. Right door unlocking device; 82. Force rod; 83. Crank; 84. First connecting rod; 85. Second connecting rod; 86. Actuating rod; 87. Unlocking cable; 9. Right unlocking auxiliary device; 901. Right door unlocking mounting seat; 902. Right door unlocking pivot; 903. Right door unlocking lever; 904. Right door unlocking cable seat; 905. Right door unlocking return spring; 906. Main unlocking seat; 907. Main unlocking pivot; 908. Main unlocking lever; 909. Main unlocking cable; 91. Second right unlocking pivot; 92. Right unlocking lever. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0023] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0024] In order to solve the problem that the left sliding door, right sliding door and main door frame 21 cannot be unlocked synchronously in the existing technology.

[0025] like Figure 1As shown, the platform door lock linkage system of this technical solution is applied to double-opening half-height platform doors of high-speed railway platforms. It includes a main frame 1, a left sliding door assembly 2, and a right sliding door assembly 3. The left sliding door assembly 2 and the right sliding door assembly 3 are respectively disposed on both sides of the main frame 1 and connected by a transmission mechanism 4 to achieve synchronous movement relative to the main frame 1. The main frame 1 is provided with a first door lock device 5 for restricting the movement of the left sliding door assembly 2 and a second door lock device 6 for restricting the movement of the main frame 1. The second door lock device 6 is connected to a trigger-type unlocking device 7 located on the movement path of the right sliding door assembly 3. The left sliding door assembly 2 and / or the right sliding door assembly 3 are provided with an unlocking device 8. The unlocking device 8 is drivenly connected to the first door lock device 5. When the unlocking device 8 is pressed, it drives the first door lock device 5 to release the movement restriction on the left sliding door assembly 2 and drives the right sliding door assembly to move synchronously through the transmission mechanism 4. During the movement of the right sliding door assembly 3, the trigger-type unlocking device 7 is triggered to unlock the second door lock device 6.

[0026] When the unlocking device 8 located at the left sliding door assembly 2 is pressed, the first door lock device 5 is first activated to release the restriction on the left sliding door assembly 2. The left sliding door assembly 2 then drives the right sliding door assembly 3 to move synchronously via the transmission mechanism 4. During the movement of the right sliding door assembly 3, it contacts the trigger-type unlocking device 7, thereby unlocking the second door lock device 6, and subsequently unlocking the main frame 1. This system achieves orderly linkage unlocking of the door locks, improving the convenience and safety of platform screen door operation, ensuring smooth door opening and closing, and also reducing the difficulty of unlocking multi-sliding door platform screen door systems, thus improving emergency escape efficiency.

[0027] In another embodiment, when the unlocking device 8 located at the right sliding door assembly 3 is pressed, the first door lock device 5 is first driven to release the restriction on the left sliding door assembly 2, and then the left sliding door assembly 2 is driven to move synchronously through the transmission mechanism 4. During the movement of the right sliding door assembly 3, it contacts the trigger-type unlocking device 7, thereby unlocking the second door lock device 6 to realize the movement of the main frame 1.

[0028] This system can be unlocked from either the left sliding door component 2 or the right sliding door component 3.

[0029] In this embodiment, the main frame 1 is equipped with a door body to serve as the main door of the platform door, which serves as the installation base for the left sliding door assembly 2 and the right sliding door assembly 3, and the interior is reserved for the installation of the transmission mechanism 4 and the door lock device.

[0030] Left sliding door assembly 2 and right sliding door assembly 3: are respectively set on both sides of the main frame 1 and connected by transmission mechanism 4 to realize synchronous movement towards or in opposite directions toward the interior of the main frame 1.

[0031] like Figure 2 As shown, the transmission mechanism 4 is specifically a synchronous belt transmission assembly, including a driving pulley 41 and a driven pulley 42 connected to a motor, and a synchronous belt 43 wound between the driving pulley 41 and the driven pulley 42. One end of the synchronous belt 43 is connected to the left sliding door assembly 2, and the other end is connected to the right sliding door assembly 3.

[0032] When the synchronous belt drive assembly is working, the motor drives the drive pulley 41 to rotate, which in turn drives the driven pulley 42 to rotate synchronously via the synchronous belt 43, causing the synchronous belt 43, which is wound between the two pulleys, to form a cyclic motion. The left and right sides of the synchronous belt 43 are connected to the left and right sliding door assemblies 3, respectively. When the motor is running, one side of the synchronous belt 43 drives the left sliding door assembly 2 to move in the opening direction, while the other side drives the right sliding door assembly 3 to move in the opposite direction, ensuring that the two doors achieve precise and symmetrical opening and closing actions. This realizes the opening or closing of the corresponding doors.

[0033] like Figures 3 to 4 As shown, the unlocking device 8 includes a left door unlocking device 81a. In some embodiments, the unlocking device 8 also includes a right door unlocking device 81b with the same structure as the left door unlocking device 8, which facilitates the user to unlock the door from the right sliding door side.

[0034] In detail, both the left door unlocking device 81a and the right door unlocking device 81b include a force-applying rod 82, a crank 83 connected to the force-applying rod 82, a first connecting rod 84 connected to the other end of the crank 83, a first connecting rod 84 movably connected to one end of a second connecting rod 85, an actuating rod 86 connected to the other end of the second connecting rod 85, and an unlocking cable 87 connected to the other end of the actuating rod 86.

[0035] When a passenger presses the force lever 82, the force lever 82 moves inward, causing the crank 83 to rotate. The rotational motion of the crank 83 is transmitted to the actuator 86 through the first connecting rod 84 and the second connecting rod 85, causing the actuator 86 to pull the unlocking cable 87. The tightening action of the unlocking cable 87 is transmitted to the first door lock device 5, triggering the unlocking mechanism of the first door lock device 5.

[0036] The interior of the main door frame 21 is hollow. Besides a clearance area reserved for the inward movement of the left sliding door assembly 2 and the right sliding door assembly 3, a first door lock device 5 is installed near the left sliding door assembly 2, and a trigger-type unlocking device 7 and a second door lock device 6 are installed near the right sliding door assembly 3. It should be understood that placing the trigger-type unlocking device 7 and the second door lock device 6 near the right sliding door assembly 3 ensures that the door frame 21 of the right sliding door assembly 3 can contact the trigger-type unlocking device 7 during unlocking.

[0037] In a specific usage scenario, the left sliding door assembly 2 includes a door frame 21, which has a groove 212 for mounting the force-applying rod 82.

[0038] It should be noted that in some embodiments, the right sliding door assembly 3 also includes a door frame with the same structure as the left sliding door assembly 2, so as to install an unlocking device on the right sliding door side.

[0039] It should also be noted that the design of the groove 212 provides a suitable mounting space for the force-applying rod 82. Once installed in the groove 212, the force-applying rod 82 integrates seamlessly with the door frame 21, meaning it is concealed within the door frame 21. This design not only maintains the clean and aesthetically pleasing appearance of the door frame 21 but also effectively prevents accidental unlocking of the platform door due to accidental contact with the force-applying rod 82, thus ensuring safety during use.

[0040] In a use case, such as Figure 3 As shown, for example, only the left sliding door assembly 2 has a force-applying rod 82 installed in the door frame 21 groove 212 (corresponding to the left door unlocking device 81a), and the right sliding door assembly 3 does not have a force-applying rod 82; or only the right sliding door assembly 3 has a force-applying rod 82 installed in the door frame 21 groove 212 (corresponding to the right door unlocking device 81b), and the left sliding door assembly 2 does not have a force-applying rod 82.

[0041] If only the left sliding door lever 82 is used: When a passenger presses the left sliding door lever 82, the lever 82 moves inward, sequentially actuating the crank 83, first connecting rod 84, second connecting rod 85, and actuator 86 of the left door unlocking device 81a, ultimately pulling the corresponding unlocking cable 87 of the left door and triggering the first door lock device 5 to unlock. Simultaneously, as the left sliding door assembly 2 moves towards the main frame 1, it drives the right sliding door assembly 3 to move synchronously via the transmission mechanism 4. After the right sliding door reaches its end, it touches the trigger-type unlocking device 7, thereby unlocking the second door lock device 6, achieving overall unlocking.

[0042] like Figure 4 As shown, the first door lock device 5 includes a cable seat 51 for the passage of the unlocking cable 87, a bent connector 52 connected to the other end of the unlocking cable 87, a first return spring 53 disposed between the bent connector 52 and the unlocking cable 87, and a hook-shaped locking member 54 tractively connected to the other end of the bent connector 52 and used to lock the locking pin disposed on the main frame 1.

[0043] like Figure 6As shown, the trigger-type unlocking device 7 includes a connecting base 71 and a trigger moving rod 72 that moves axially within the connecting base 71; it also includes a trigger paddle 73 disposed at the end of the trigger moving rod 72, the trigger paddle 73 being connected to the second door lock device 6. The trigger-type unlocking device 7 also includes a third return spring 74, the third return spring being disposed on the outer periphery of the trigger moving rod 72, one end of which abuts against a limiting member on the trigger moving rod 72, and the other end abuts against the inner wall of the connecting base 71.

[0044] The second door lock device 6 includes a drive motor for driving the main door frame 21 to move. The output shaft 61 of the drive motor is connected to a friction plate 62 that abuts against the output shaft in the locked state to restrict the rotation of the output shaft, thereby restricting the movement of the main frame 1. The friction plate 62 is connected to the bifurcated end 731 of the trigger paddle 73. When the trigger paddle 73 is pressed, it separates the friction plate 62 from the output shaft 61 of the drive motor.

[0045] When the unlocking cable 87 is pulled, the bent connector 52 rotates clockwise, causing the hook-shaped locking member 54 to disengage from the locking pin (which is fixed to the main frame 1), thus releasing the movement restriction on the left sliding door assembly 2 and allowing it to move relative to the main frame 1. At this time, a force is applied to the left sliding door towards the main frame 1, allowing the left sliding door assembly 2 to move inward into the main frame 1. Simultaneously, the movement of the left sliding door assembly 2 drives the right sliding door assembly 3 on the other side to move synchronously inward into the main frame 1 via the transmission mechanism 4, ultimately achieving synchronous unlocking and movement of the leftmost sliding door assembly 2 and the right sliding door assembly 3.

[0046] In another application scenario, after the left sliding door assembly 2 is unlocked, it will not move on its own unless a force is applied to it to move the main frame 1. Specifically, during the unlocking process, the first return spring 53 is stretched; when the external force (such as the force pulling the cable) is released, the first return spring 53 pulls the bent connecting piece 52 back to its original position, causing the hook-shaped locking piece 54 to re-engage with the locking pin, restoring the lock on the left sliding door assembly 2. Therefore, unless the left sliding door assembly 2 is pushed again, it will remain stationary and will not move.

[0047] In the unlocking scenario, when the right sliding door assembly 3 moves inward toward the main frame 1, the end of its door frame 21 will touch the trigger-type unlocking device 7. Since the second door lock device 6 is connected to the trigger-type unlocking device 7 (located on the moving path of the right sliding door assembly 3), when the trigger-type unlocking device 7 is touched, it will drive the second door lock device 6 to unlock, thereby releasing the main frame 1 from its locked state and enabling it to move.

[0048] When the right sliding door assembly 3 moves to its end position inside the main frame 1, its door frame 21 presses against the trigger moving rod 72, causing the trigger moving rod 72 to move axially. This pushes out the trigger paddle 73, causing the trigger paddle 73 to press against one end of the linkage mechanism 63. According to the lever principle, the other end of the linkage mechanism 63 causes the friction plate 62 to separate from the output shaft 61 of the drive motor, allowing the output shaft 61 of the drive motor to rotate. This causes the main frame 1 to move through gear transmission, thereby releasing the restriction on the main frame 1.

[0049] It should be noted that the linkage mechanism 63 in this embodiment includes a main rod and a structure that extends outward from one end of the main rod to both sides to form a bifurcated end, which is a Y-shaped structure. The bifurcated end is connected to the friction plate 62. The end away from the bifurcation moves to the right sliding door assembly 3 to squeeze the trigger moving rod 72 so that the trigger paddle 73 can extend. The end away from the bifurcation contacts the trigger paddle 73 and can be squeezed by the trigger paddle 73 to pry the friction plate 62 so that the friction plate 62 is separated from the output shaft of the motor.

[0050] In another locking scenario, if the right sliding door assembly 3 does not move inward toward the main frame 1, its door frame 21 will not press against the trigger moving rod 72, and the trigger lever 73 will not extend and thus cannot contact the linkage mechanism 63. Since the linkage mechanism is not compressed, it loses its prying effect on the friction plate 62, and the friction plate 62 remains pressed against the output shaft 61 of the drive motor, restricting the rotation of the output shaft 61 of the drive motor, ultimately keeping the main frame 1 locked and unable to move.

[0051] In another embodiment, if only the right sliding door assembly 3 is equipped with a force-applying lever 82: when a passenger presses the force-applying lever 82 in the right sliding door assembly 3, it is connected to the first door lock device 5 via the transmission structure of the right door unlocking device 8. When the corresponding unlocking cable 87b in the right sliding door assembly 3 is pulled, the first door lock device 5 is triggered to unlock. Subsequently, the right sliding door assembly 3 moves towards the main frame 1, and its door frame 21 touches the trigger-type unlocking device 7, unlocking the second door lock device 6, thus completing the unlocking of the left sliding door assembly 2, the right sliding door assembly 3, and the main frame 1.

[0052] It should be noted that in this usage scenario, a right unlocking auxiliary device 9 is set in the area near the right sliding door assembly 3. In this embodiment, since the right sliding door assembly 3 is far away from the first door lock device 5, it is necessary to use the right unlocking auxiliary device 9 to link with the first door lock device 5 in order to unlock the first door lock device 5.

[0053] Detailed, such as Figure 5As shown, the right unlocking auxiliary device 9 includes a right door unlocking mounting base 901 disposed on the right sliding door frame 21b, a right door unlocking pivot 902, a right door unlocking lever 903, a right door unlocking cable seat 904, and a right door unlocking reset spring 905. It also includes a main unlocking seat 906, a main unlocking pivot 907, a main unlocking lever 908, and a main unlocking cable 909, as well as a second right unlocking pivot 91 and a right unlocking lever 92 disposed at the first door lock device 5.

[0054] In detail, the right door unlocking pivot 902 and the right door unlocking cable seat 904 are mounted on the right door unlocking mounting base 901. One end of the right door unlocking lever 903 is rotatably mounted on the right door unlocking pivot 902, and the other end of the right door unlocking lever 903 is connected to the right unlocking cable 87b. The right unlocking cable 87b is connected to the actuator 86b in the right door unlocking device 81b.

[0055] The right door unlocking reset spring 905 is disposed between the right door unlocking cable seat 904 and the right door unlocking lever 903. When no external force is applied, the right door unlocking reset spring 905 allows the right door unlocking lever 903 to be set at an angle to the main unlocking lever 908, thus preventing the right door unlocking lever 903 and the main unlocking lever 908 from affecting each other when the right sliding door assembly 3 moves.

[0056] In addition, the main unlocking seat 906 is disposed on the main frame 1, the main unlocking pivot 907 is disposed on the main unlocking seat 906, the main unlocking lever 908 is rotatably disposed on the main unlocking pivot 907, one end of the main unlocking lever 908 away from the right door unlocking lever 903 is connected to one end of the main unlocking cable 909, and the other end of the main unlocking cable 909 is connected to one end of the right unlocking block 92.

[0057] It should also be noted that the right unlocking lever 92 is located at the first door lock device 5 and is rotatably mounted on the main frame 1 via the second right unlocking pivot 91, and the end of the right unlocking lever 92 is connected to the hook-shaped locking member 54 in the first door lock device 5.

[0058] like Figure 5As shown, in specific implementation, when a passenger presses the force lever 82b of the right sliding door, the force lever 82b drives the crank 83b, the first connecting rod 84b, and the second connecting rod 85b of the right door unlocking device 8 to move, pulling the right unlocking cable 87b; the right unlocking cable 87b can drive the right door unlocking lever 903 to rotate in the unlocking direction, causing the right door unlocking lever 903 to drive the main unlocking lever 908 to rotate in the unlocking direction, and then pull the right door unlocking lever 903 to rotate in the unlocking direction through the main unlocking cable 909. Finally, the right door unlocking lever 903 drives the hook-shaped locking member 54 of the first door lock device 5 to disengage from the locking pin located on the main frame 1, thus unlocking the first door lock device 5.

[0059] At this time, a thrust is given to the right sliding door assembly 3 to move inward toward the main frame 1, and the left sliding door assembly 2 can also be driven to move through the synchronous belt 43 transmission mechanism 4.

[0060] Then, as the right sliding door assembly 3 moves further, the door frame 21 of the right sliding door touches the trigger unlocking device 7. The door frame 21 presses the trigger moving rod 72 of the trigger unlocking device 7. The trigger moving rod 72 drives the trigger paddle 73 to squeeze the force-receiving end 632 of the Y-shaped linkage mechanism. Through the lever action, the force-receiving end 632 drives the bifurcation end 631 to lift up, thereby causing the friction plate 62 to separate from the output shaft of the drive motor. The second door lock device 6 is unlocked, and the main frame 1 can move under the action of the drive motor to unlock the main frame 1.

[0061] In summary, this technical solution enables simultaneous unlocking of the left sliding door, right sliding door, and the main door corresponding to the main frame, regardless of whether the unlocking action is performed from the left sliding door assembly 2 or the right sliding door assembly 3. This technical solution establishes a complete collaborative unlocking mechanism, allowing the three components to cooperate orderly during the unlocking process, avoiding the asynchronous unlocking issues caused by independent control in traditional technologies.

[0062] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0063] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0065] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0068] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0069] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A platform screen door lock linkage system, characterized in that: It includes a main frame, a left sliding door assembly and a right sliding door assembly. The left sliding door assembly and the right sliding door assembly are respectively disposed on both sides of the main frame and are connected by a transmission mechanism to achieve synchronous movement relative to the main frame. The main frame is provided with a first door lock device for restricting the left sliding door assembly and a second door lock device for restricting the movement of the main frame. The second door lock device is connected to a trigger-type unlocking device located on the moving path of the right sliding door assembly; The left sliding door assembly and / or the right sliding door assembly are provided with an unlocking device. The unlocking device is connected to the first door lock device. When the unlocking device is pressed, it drives the first door lock device to release the movement restriction on the left sliding door assembly and drives the right sliding door assembly to move synchronously through the transmission mechanism. During the movement of the right sliding door assembly, the trigger-type unlocking device is triggered to unlock the second door lock device.

2. The platform door lock linkage system according to claim 1, characterized in that: The unlocking device includes a left door unlocking device; The left door unlocking device includes a force-applying rod, a crank connected to the force-applying rod, a first connecting rod connected to the other end of the crank, a first connecting rod movably connected to one end of a second connecting rod, an actuating rod connected to the other end of the second connecting rod, and an unlocking cable connected to the other end of the actuating rod.

3. The platform door lock linkage system according to claim 2, characterized in that: The left sliding door assembly includes a door frame having a groove for mounting the force-applying rod.

4. The platform door lock linkage system according to claim 2, characterized in that: The first door lock device includes a cable seat for the passage of the unlocking cable, a bent connector connected to the other end of the unlocking cable, a first return spring disposed between the bent connector and the unlocking cable, and a hook-shaped locking member pulsatorically connected to the other end of the bent connector and used to lock a locking pin disposed on the main frame.

5. The platform door lock linkage system according to claim 1, characterized in that: The trigger-type unlocking device includes a connecting base and a trigger moving rod that moves axially within the connecting base. It also includes a trigger lever located at the end of the trigger moving rod, the trigger lever being connected to the second door lock device.

6. The platform door lock linkage system according to claim 5, characterized in that: The trigger-type unlocking device also includes a third reset spring, which is located on the outer periphery of the trigger moving rod. One end of the third reset spring abuts against the limiting member on the trigger moving rod, and the other end abuts against the inner wall of the connecting seat.

7. The platform door lock linkage system according to claim 6, characterized in that: The second door lock device includes a drive motor for driving the main door frame to move. The output shaft of the drive motor is connected to a friction plate that abuts against the output shaft in the locked state to restrict the rotation of the output shaft, thereby restricting the movement of the main frame. The friction plate is connected to the bifurcated end of the trigger lever. When the trigger lever is pressed, it separates the friction plate from the output shaft.

8. The platform door lock linkage system according to claim 5, characterized in that: The trigger-activated unlocking device is located in the area near the right sliding door assembly.

9. The platform door lock linkage system according to claim 1, characterized in that: The transmission mechanism is a synchronous belt transmission assembly, which includes a driving pulley and a driven pulley connected to a motor, and a synchronous belt wound between the driving pulley and the driven pulley. One end of the synchronous belt is connected to the left sliding door assembly, and the other end is connected to the right sliding door assembly.

10. A platform screen door, characterized in that: The system includes a platform door lock linkage system according to any one of claims 1-9.

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