Universal through-the-lock cylinder storm door lock and method

Abstract

The present application relates to train door lock technical field, specifically to a kind of general through type lock cylinder sliding door lock and method.The present application includes long stroke lock box, and lock cylinder assembly and lock head assembly are arranged in the both sides of lock box, wherein:lock box includes shell, and spring reset block and limiting block are arranged in the middle part of shell;Lock cylinder assembly includes lock cylinder, limiting plate, sliding plate and connecting plate, and limiting pressing strip for reset is arranged on the top of sliding plate;Lock head assembly includes lock head body, and lock tongue is arranged in the lock head body, and the end of lock tongue is connected with lock bar.The present application realizes the function of long stroke vertical opening and closing door by the synergistic effect of lock cylinder assembly, lock box and lock head assembly, so that the maximum retraction of lock tongue reaches 18mm;Upper protrusion on limiting plate and blocking edge strip of sliding plate interact, and connecting rod is pulled to synchronize the action of connecting plate and lock bar, and the overall structure is compact, and operation is convenient;Spring reset block and limiting pressing strip are combined, to ensure the accurate reset of lock cylinder and sliding plate.

Description

Technical Field

[0001] This invention relates to the field of train door lock technology, specifically to a universal through-type lock cylinder pull door lock and method. Background Technology

[0002] In door systems of high-speed trains, subway cars, or large public facilities, long-stroke vertical opening and closing functionality is crucial. To meet this requirement, door lock systems need sufficient travel, necessitating a corresponding increase in lock box length to accommodate longer bolts or locking bars. For example, the lock box length may reach 18cm to ensure the door can be fully opened or closed. Technicians have explored this extensively, such as the door lock with an automatically limiting bolt disclosed in Chinese patent CN112963055A. This lock uses a limiting block and a small wedge block on a rotating strike plate to form a wedge mechanism, which works in conjunction with a rectangular limiting groove on the limiting plate to achieve the desired function. However, existing door locks still suffer from structural complexity, inconvenient operation, and insufficient reliability when performing long-stroke vertical opening and closing. Furthermore, insufficient bolt retraction distance and inaccurate reset also affect door opening and closing, user experience, durability, security, and reliability, and may even accelerate lock wear and aging. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a universal through-type lock cylinder pull door lock and method.

[0004] The technical solution adopted in this invention is as follows: A universal through-type lock cylinder pull door lock includes a long-stroke lock box, and a lock cylinder assembly and a lock head assembly disposed on both sides of the lock box, wherein: The lock box includes a housing, in which a spring return block and a limiting block are provided in the middle. The spring return block and the limiting block are connected to the lock cylinder assembly and the lock head assembly respectively via a through lock rod. The lock cylinder assembly includes a lock cylinder, a limiting plate, a sliding plate, and a connecting plate. The lock cylinder abuts against the limiting plate and moves the limiting plate laterally via a torque lever. The limiting plate abuts against the bottom of the sliding plate and moves the sliding plate upward. One end of the connecting plate is connected to the limiting plate, and the other end of the connecting plate is connected to the lock rod via a connecting rod. The connecting plate and the limiting plate move laterally synchronously. A reset limiting strip is provided above the sliding plate. The lock assembly includes a lock body and a bolt disposed within the lock body, the bolt being connected to the end of the lock bar.

[0005] This technical solution achieves long-stroke vertical door opening and closing functionality through the coordinated action of the lock cylinder assembly, lock box, and lock head assembly, fully meeting diverse usage needs. Its overall structure is compact and easy to operate, significantly improving the reliability of the door lock. The combination of the spring return block and the limiting pressure strip ensures precise reset of the lock cylinder and sliding plate. Specifically, the lock cylinder in the lock cylinder assembly, driven by the rotation of the handle, moves the limiting plate in close contact with it laterally, successfully converting rotational motion into lateral driving force. During this process, the limiting plate further pushes the sliding plate upwards. The sliding plate and the lock cylinder are located on the upper and lower sides of the limiting plate, respectively, forming sufficient torque to ensure that the limiting plate moves to the right and maintains the long stroke required for the lock rod to retract 18mm. Simultaneously, as the limiting plate moves, the connecting plate also moves synchronously, transmitting power to the lock rod through the connecting rod, achieving long-distance transmission from the lock cylinder to the bolt. When the lock cylinder rotates and drives the bolt to retract, the spring return block, under the elastic force of the spring, pushes the limiting plate to reset through the lock rod, ensuring that the bolt automatically extends after the key is removed, restoring the locked state. In addition, the limit block plays a key positioning role in the lock box, ensuring the stability of the bolt during retraction and extension, and working with the lock bar to effectively limit the range of movement of the bolt, preventing it from moving excessively or being damaged.

[0006] In addition, the universal through-type lock cylinder pull door lock proposed according to the present invention also has the following additional technical features: According to one embodiment of the present invention, the limiting plate includes a strip-shaped body located above the lock cylinder. The bottom of the strip-shaped body is provided with a lower groove that cooperates with the lock cylinder for being driven to move to the right by the lock cylinder. A transverse limiting hole is provided in the middle of the strip-shaped body for limiting the transverse movement direction of the strip-shaped body. The top of the strip-shaped body is provided with an upper protrusion that cooperates with the sliding plate for driving the sliding plate to move upward.

[0007] In this technical solution, the lower groove at the bottom of the strip-shaped body cooperates with the lock cylinder. When the lock cylinder is subjected to the rotational force of the handle, its shape matches the lower groove, allowing the lock cylinder to push the limiting plate to move to the right, ensuring that the rotational motion of the lock cylinder can be effectively converted into the lateral movement of the limiting plate. The upper protrusion at the top of the strip-shaped body cooperates with the sliding plate. When the limiting plate moves to the right, the upper protrusion will abut against and push the sliding plate upward. The force is transmitted to the sliding plate through the upper protrusion, realizing the upward movement of the sliding plate. The lateral limiting hole in the middle of the strip-shaped body is used to limit the lateral movement direction of the limiting plate, ensuring that the limiting plate can only move on the predetermined path, preventing the limiting plate from deviating or shaking during movement, thereby ensuring the accuracy of transmission. The overall shape of the limiting plate matches the cooperation requirements of the lock cylinder and the sliding plate, ensuring that the relative position and movement relationship between the components can meet the design requirements. For example, the shape of the lower groove matches the contour of the lock cylinder, and the shape and position of the upper protrusion match the contact surface of the sliding plate.

[0008] According to one embodiment of the present invention, the lower groove is U-shaped with both sides inclined, and its left, middle and right sides are three different limiting points of the lock cylinder, which are used to drive the limiting plate and the sliding plate to different states.

[0009] To ensure the lock cylinder accurately contacts different limiting points and achieves stable state switching, the position, shape, and size of the lower groove need to be precisely set. The lower groove is U-shaped with both sides inclined, allowing the lock cylinder to contact different parts of the groove during rotation, thus achieving different limiting effects. For example, when the lock cylinder first rotates, it contacts the right limiting point of the groove; when the lock cylinder rotates a certain angle, it contacts the middle limiting point of the groove; and when the lock cylinder rotates further, it contacts the left limiting point of the groove.

[0010] According to one embodiment of the present invention, the upper protrusion includes protrusion I and protrusion II; when the lock cylinder abuts against the left side of the lower groove, protrusion I is limited to the edge strip; when the lock cylinder rotates clockwise, protrusion I disengages from the edge strip; when the lock cylinder abuts against the middle of the lower groove, protrusion I and protrusion II together lift the edge strip upward; when the lock cylinder continues to rotate clockwise and abuts against the right side of the lower groove, protrusion II is limited to the edge strip, and the edge strip falls back downward under the reset action of the limiting pressure strip.

[0011] In this technical solution, when the lock cylinder contacts the left side of the lower groove, protrusion I is confined within the stop strip. At this time, the lock cylinder is in the initial or locked state. The limiting function of protrusion I ensures that the bolt remains extended, thus keeping the sliding door in the locked state. As the lock cylinder rotates clockwise and contacts the center of the lower groove, protrusions I and II work together to lift the stop strip using the lever principle, providing sufficient power for unlocking and enabling a long-stroke vertical door opening and closing operation with the lock rod retracting 18mm. When the lock cylinder continues to rotate clockwise until it contacts the right side of the lower groove, protrusion II is confined within the stop strip. At this time, the bolt retracts, and the sliding door can be opened. The limiting function of protrusion II ensures that the stop strip can stably maintain its position after the lock cylinder rotates to the correct position.

[0012] According to one embodiment of the present invention, the slide plate includes a U-shaped body, a baffle strip is provided on the top of the U-shaped body, the baffle strip cooperates with the upper protrusion of the limiting plate and is driven to move upward by the limiting plate; a limiting pressure strip abuts against the baffle strip and applies a pre-tightening force to the baffle strip, so as to make the U-shaped body move downward to achieve reset; vertical limiting holes are provided on both sides of the U-shaped body to limit the vertical movement direction of the U-shaped body.

[0013] In this technical solution, the edge strip at the top of the U-shaped body is used to cooperate with the upper protrusion of the limiting plate; when the limiting plate is driven by the lock cylinder to move, its upper protrusion will contact the edge strip and drive it to move upward, ensuring that the slide can move according to the predetermined path and distance; the vertical limiting holes on both sides of the U-shaped body are used to limit the vertical movement direction of the slide, preventing the slide from deviating or shaking during movement, thereby ensuring the accuracy of transmission; when the lock cylinder rotates and drives the limiting plate to move, the upper protrusion of the limiting plate will cooperate with the edge strip of the slide. Contact and the generation of compressive force are converted into the driving force for the upward movement of the slide plate, thereby realizing the transmission between the slide plate and the lock cylinder; the limiting pressure strip abuts against the edge strip and applies a certain preload to the edge strip, ensuring that when the limiting plate no longer applies driving force to the edge strip, the slide plate can automatically move downward and reset under the action of the limiting pressure strip; when the lock cylinder rotates to the position and releases the driving force on the limiting plate, the limiting pressure strip will push the edge strip downward under its elastic action; the vertical limiting hole ensures that the slide plate will not deviate from the predetermined path during the reset process.

[0014] According to one embodiment of the present invention, the connecting plate is provided with mounting holes, and the connecting plate is connected to the limiting plate and the connecting rod through the mounting holes respectively. The connecting rod is connected to the lock tongue through the locking rod, and the locking tongue is driven to retract by 18mm through the limiting plate to realize long-stroke vertical opening and closing of the door; the connecting rod is connected to the spring reset block through the locking rod, and the spring reset block is used to move the strip-shaped body to the left to achieve reset.

[0015] In this technical solution, the mounting holes on the connecting plate are used to fix the limiting plate and the connecting rod, thereby constructing a stable mechanical transmission system. When the limiting plate is subjected to the rotation of the lock cylinder, it transmits force to the connecting rod through the connecting plate. The other end of the connecting rod is connected to the bolt through the locking rod, forming a continuous transmission chain. When the limiting plate moves, it drives the bolt to move accordingly through the connecting rod and the locking rod. The connecting rod is not only connected to the locking rod and the bolt, but also to the spring return block through the locking rod. The spring return block uses the elastic force of the spring to drive the strip-shaped body to move to the left and return to its original position. When the bolt retracts and the door is opened, the spring return block will push the strip-shaped body to the left under the action of the spring force, thereby causing the bolt to extend and lock the door.

[0016] According to one embodiment of the present invention, the lock cylinder assembly further includes a support plate, on which a lateral limiting post, a vertical limiting post, and a reset limiting post are provided, wherein: the lateral limiting post is located in the lateral limiting groove and is used to cooperate with the limiting plate for lateral limiting; the vertical limiting post is located in the vertical limiting grooves on both sides and is used to cooperate with the sliding plate for vertical limiting; the reset limiting post is located at the end of the limiting pressure strip and is used to cooperate with the sliding plate for vertical reset.

[0017] In this technical solution, the lateral limiting post of the tray effectively constrains the lateral movement range of the lock cylinder assembly, ensuring that the limiting plate can strictly follow the predetermined path for lateral movement; at the same time, the vertical limiting post on the tray restricts the vertical movement range of the slide plate, allowing the slide plate to move vertically along the predetermined path; in addition, the reset limiting post on the tray is located at the end of the limiting pressure strip, and with the help of the reset force of the elastic element, it works in conjunction with the limiting pressure strip and the slide plate to push the slide plate to accurately return to the initial position or reset state.

[0018] According to one embodiment of the present invention, the lock cylinder assembly further includes a plug located on the side of the support plate.

[0019] In this technical solution, the plug located on the side of the tray serves to seal and protect the lock cylinder assembly. The plug is made of waterproof material and fits tightly with the tray, effectively preventing moisture, dust and other impurities from entering the interior of the lock cylinder assembly, thus ensuring the durability of the lock cylinder assembly.

[0020] According to one embodiment of the present invention, the spring reset block includes a reset block body, in which a spring and a friction-reducing pad are installed. The spring cooperates with the locking rod to reset the limiting plate, thereby driving the locking tongue to extend. The friction-reducing pad is located between the locking rod and the reset block body.

[0021] In this technical solution, the friction-reducing pad is located between the locking rod and the reset block body. Its main function is to reduce the frictional resistance of the locking rod during movement. By reducing the coefficient of friction, the friction-reducing pad ensures that the locking rod moves more smoothly and stably, thereby extending the service life of the door lock. To achieve good lubrication, the friction-reducing pad is usually made of a material with a low coefficient of friction and high wear resistance.

[0022] To achieve the above objectives, the present invention also provides a method for a universal through-type lock cylinder sliding door.

[0023] A general method for a through-type lock cylinder sliding door includes the following steps: Insert the key into the lock cylinder, rotate the handle, and the lock cylinder will move the limit plate to the right; the limit plate will move the slide plate upward through the upper protrusion, and at the same time the connecting plate will pull the lock rod through the connecting rod, causing the lock tongue to retract 18mm, which is used to realize long stroke vertical opening and closing of the door; When the key is removed from the lock cylinder, the spring reset block causes the limit plate to reset to the left via the lock rod. At the same time, the slide plate resets downward under the action of the limit pressure bar, and the lock tongue extends again, restoring the locked state.

[0024] In this technical solution, the upper protrusion on the limiting plate interacts with the stop strip of the sliding plate, causing the sliding plate to move upward. This action is synchronized with the action of the connecting plate pulling the locking rod through the connecting rod, together realizing the retraction of the bolt and achieving long-stroke vertical opening and closing of the door. When the key is removed from the lock cylinder, the spring return block and the limiting pressure strip begin to function. The spring return block pushes the limiting plate to reset to the left, and the sliding plate also resets downward under the guidance of the limiting pressure strip. Finally, the bolt extends again, restoring the locked state.

[0025] Compared with the prior art, the present invention has the following advantages: (1) Through the coordinated action of the lock cylinder assembly, lock box and lock head assembly, the function of long stroke vertical door opening and closing is realized, so that the lock tongue can retract up to 18mm. (2) The upper protrusion on the limit plate interacts with the edge strip of the slide plate and is synchronized with the action of the connecting plate pulling the locking rod through the connecting rod. The overall structure is compact and easy to operate. The combination of the spring reset block and the limit pressure strip ensures the precise reset of the lock cylinder and the slide plate. Attached Figure Description

[0026] Figure 1 This is a perspective view of the entire invention.

[0027] Figure 2 This is a top view of the entire invention.

[0028] Figure 3 This is a cross-sectional view of the entire invention.

[0029] Figure 4 This is a structural diagram of the internal structure of the present invention.

[0030] Figure 5 This is a schematic diagram of the limiting plate.

[0031] Figure 6 This is a schematic diagram of a skateboard.

[0032] Figure 7 This is a structural diagram of the connecting plate.

[0033] Figure 8 This is a 3D view of the lock cylinder assembly.

[0034] Figure 9 This is one of the state diagrams for the lock cylinder assembly.

[0035] Figure 10 This is the second state diagram of the lock cylinder assembly.

[0036] Figure 11 This is the third state diagram of the lock cylinder assembly.

[0037] In the diagram: 1. Lock box; 2. Lock cylinder assembly; 21. Lock cylinder; 22. Limiting plate; 221. Strip-shaped body; 222. Horizontal limiting hole; 223. Lower groove; 224. Upper protrusion; 23. Slide plate; 231. U-shaped body; 232. Edge guard strip; 233. Vertical limiting hole; 24. Connecting plate; 25. Limiting pressure strip; 26. Connecting rod; 27. Horizontal limiting post; 28. Vertical limiting post; 29. ​​Plug; 3. Lock head assembly; 31. Lock head body; 32. Lock tongue; 4. Spring return block; 41. Return block body; 42. Spring; 5. Lock rod; 6. Limiting block. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1 like Figures 1 to 11 As shown, this embodiment provides a universal through-type lock cylinder pull door lock, including a long-stroke lock box 1, and a lock cylinder assembly 2 and a lock head assembly 3 disposed on both sides of the lock box 1, wherein: The lock box 1 includes a housing, in which a spring return block 4 and a limiting block 6 are provided. The spring return block 4 and the limiting block 6 are connected to the lock cylinder assembly 2 and the lock head assembly 3 respectively via a through lock rod 5. The lock cylinder assembly 2 includes a lock cylinder 21, a limiting plate 22, a sliding plate 23, and a connecting plate 24. The lock cylinder 21 abuts against the limiting plate 22 and moves the limiting plate 22 laterally via a torque lever. The limiting plate 22 abuts against the bottom of the sliding plate 23 and moves the sliding plate 23 upward. One end of the connecting plate 24 is connected to the limiting plate 22, and the other end of the connecting plate 24 is connected to the lock rod 5 via a connecting rod 26. The connecting plate 24 and the limiting plate 22 move laterally synchronously. A reset limiting strip 25 is provided above the sliding plate 23. The lock assembly 3 includes a lock body 31 and a bolt 32 disposed within the lock body 31, the bolt 32 being connected to the end of the lock bar 5.

[0040] like Figures 1 to 11As shown, this technical solution achieves the function of long-stroke vertical door opening and closing through the coordinated action of the lock cylinder assembly 2, lock box 1, and lock head assembly 3, fully meeting diverse usage needs. Its overall structure is compact, easy to operate, and greatly improves the reliability of the door lock. The combination of the spring return block 4 and the limiting pressure strip 25 ensures the precise reset of the lock cylinder 21 and the sliding plate 23. Specifically, the lock cylinder 21 in the lock cylinder assembly 2, driven by the rotation of the handle, drives the limiting plate 22, which is in close contact with it, to move laterally, successfully converting the rotational motion into lateral driving force. During this process, the limiting plate 22 further pushes the sliding plate 23 to move upward. The sliding plate 23 and the lock cylinder 21 are located on the upper and lower sides of the limiting plate 22, respectively, forming a sufficient torque to ensure that the limiting plate 22 moves to the right and maintains the long stroke state required for the lock rod 5 to retract by 18mm. At the same time, when the limiting plate 22 moves, the connecting plate 24 also moves synchronously and transmits power to the lock rod 5 through the connecting rod 26, realizing long-distance transmission from the lock cylinder 21 to the bolt 32. When the lock cylinder 21 rotates and drives the bolt 32 to retract, the spring reset block 4, under the elastic force of the spring 42, pushes the limiting plate 22 to reset through the lock rod 5, ensuring that the bolt 32 can automatically extend after the key is removed, restoring the locked state. In addition, the limiting block 6 plays a key positioning role in the lock box 1, ensuring the stability of the bolt 32 during retraction and extension, and cooperating with the locking bar 5 to effectively limit the range of motion of the bolt 32 and prevent it from moving excessively or being damaged.

[0041] In addition, the universal through-type lock cylinder pull door lock proposed according to the present invention also has the following additional technical features: like Figure 5 As shown, the limiting plate 22 includes a strip-shaped body 221, which is located above the lock cylinder 21. The bottom of the strip-shaped body 221 is provided with a lower groove 223 that cooperates with the lock cylinder 21, and is used to be driven to move to the right by the lock cylinder 21. A transverse limiting hole 222 is provided in the middle of the strip-shaped body 221 to limit the transverse movement direction of the strip-shaped body 221. The top of the strip-shaped body 221 is provided with an upper protrusion 224 that cooperates with the sliding plate 23, and is used to drive the sliding plate 23 to move upward.

[0042] In this technical solution, the lower groove 223 at the bottom of the strip-shaped body 221 cooperates with the lock cylinder 21. When the lock cylinder 21 is subjected to the rotational force of the handle, its shape matches the lower groove 223, enabling the lock cylinder 21 to push the limiting plate 22 to move to the right, ensuring that the rotational movement of the lock cylinder 21 can be effectively converted into the lateral movement of the limiting plate 22. The upper protrusion 224 at the top of the strip-shaped body 221 cooperates with the sliding plate 23. When the limiting plate 22 moves to the right, the upper protrusion 224 will abut against and push the sliding plate 23 to move upward. The upper protrusion 224 transmits force to the slide plate 23, enabling the slide plate 23 to rise. The transverse limiting hole 222 in the middle of the strip-shaped body 221 restricts the transverse movement direction of the limiting plate 22, ensuring that the limiting plate 22 can only move on a predetermined path, preventing the limiting plate 22 from deviating or wobbling during movement, thereby ensuring the accuracy of transmission. The overall shape of the limiting plate 22 matches the fitting requirements of the lock cylinder 21 and the slide plate 23, ensuring that the relative position and movement relationship between the components meet the design requirements. For example, the shape of the lower groove 223 matches the contour of the lock cylinder 21, and the shape and position of the upper protrusion 224 match the contact surface of the slide plate 23.

[0043] like Figure 5 As shown, the lower groove 223 is U-shaped with both sides inclined. Its left, middle and right sides are three different limiting points of the lock cylinder 21, which are used to drive the limiting plate 22 and the sliding plate to different states.

[0044] To ensure that the lock cylinder 21 can accurately contact different limiting points and achieve stable state switching, the position, shape, and size of the lower groove 223 need to be precisely set. The lower groove 223 is U-shaped with both sides inclined, so that the lock cylinder 21 can contact different parts of the lower groove 223 during rotation, thereby achieving different limiting effects. For example, when the lock cylinder 21 just rotates, it contacts the right limiting point of the groove; when the lock cylinder 21 rotates a certain angle, it contacts the middle limiting point of the groove; when the lock cylinder 21 rotates further, it contacts the left limiting point of the groove.

[0045] like Figure 5 As shown, the upper protrusion 224 includes protrusion I and protrusion II; when the lock cylinder 21 abuts against the left side of the lower groove 223, protrusion I is limited to the edge strip 232; when the lock cylinder 21 rotates clockwise, protrusion I disengages from the edge strip 232; when the lock cylinder 21 abuts against the middle of the lower groove 223, protrusion I and protrusion II together lift the edge strip 232 upward; when the lock cylinder 21 continues to rotate clockwise, when the lock cylinder 21 abuts against the right side of the lower groove 223, protrusion II is limited to the edge strip 232, and the edge strip 232 falls back downward under the reset action of the limiting pressure strip 25.

[0046] In this technical solution, when the lock cylinder 21 contacts the left side of the lower groove 223, protrusion I is confined within the stop strip 232. At this time, the lock cylinder 21 is in the initial or locked state. The limiting function of protrusion I ensures that the bolt 32 remains extended, thereby keeping the sliding door in the locked state. As the lock cylinder 21 rotates clockwise and contacts the middle of the lower groove 223, protrusions I and II work together to lift the stop strip 232 using the lever principle, providing sufficient power for unlocking and enabling the long-stroke vertical opening and closing operation of the lock rod 5 by retracting 18mm. When the lock cylinder 21 continues to rotate clockwise until it contacts the right side of the lower groove 223, protrusion II is confined within the stop strip 232. At this time, the bolt 32 retracts, and the sliding door can be opened. The limiting function of protrusion II ensures that after the lock cylinder 21 rotates to the correct position, the stop strip 232 can stably maintain its position.

[0047] like Figure 6 As shown, the slide plate 23 includes a U-shaped body 231. A retaining strip 232 is provided on the top of the U-shaped body 231. The retaining strip 232 cooperates with the upper protrusion 224 of the limiting plate 22 and is driven to move upward by the limiting plate 22. The limiting pressure strip 25 abuts against the retaining strip 232 and applies a pre-tightening force to the retaining strip 232 to make the U-shaped body 231 move downward to achieve reset. Vertical limiting holes 233 are provided on both sides of the U-shaped body 231 to limit the vertical movement direction of the U-shaped body 231.

[0048] In this technical solution, the baffle strip 232 at the top of the U-shaped body 231 is used to cooperate with the upper protrusion 224 of the limiting plate 22; when the limiting plate 22 is driven by the lock cylinder 21 to move, its upper protrusion 224 will contact the baffle strip 232 and drive it to move upward, ensuring that the slide plate 23 can move according to the predetermined path and distance; the vertical limiting holes 233 on both sides of the U-shaped body 231 are used to limit the vertical movement direction of the slide plate 23, preventing the slide plate 23 from deviating or shaking during movement, thereby ensuring the accuracy of transmission; when the lock cylinder 21 rotates and drives the limiting plate 22 to move, the upper protrusion 224 of the limiting plate 22 will contact the baffle strip 232 of the slide plate 23, thus ensuring the accuracy of transmission; when the lock cylinder 21 rotates and drives the limiting plate 22 to move, the upper protrusion 224 of the limiting plate 22 will contact the baffle strip 232 of the slide plate 23. The edge strip 232 contacts and generates a compressive force, which is converted into a driving force for the slide plate 23 to move upward, thereby realizing the transmission between the slide plate 23 and the lock cylinder 21; the limiting pressure strip 25 abuts against the edge strip 232 and applies a certain preload to the edge strip 232 to ensure that when the limiting plate 22 no longer applies a driving force to the edge strip 232, the slide plate 23 can automatically move downward and reset under the action of the limiting pressure strip 25; when the lock cylinder 21 rotates to the position and releases the driving force on the limiting plate 22, the limiting pressure strip 25 will push the edge strip 232 downward under its elastic action; the vertical limiting hole 233 will ensure that the slide plate 23 will not deviate from the predetermined path during the reset process.

[0049] According to one embodiment of the present invention, the connecting plate 24 is provided with mounting holes, and the connecting plate 24 is connected to the limiting plate 22 and the connecting rod 26 through the mounting holes. The connecting rod 26 is connected to the locking tongue 32 through the locking rod 5. The locking tongue 32 is driven to retract by 18mm through the limiting plate 22, which is used to realize long-stroke vertical opening and closing of the door. The connecting rod 26 is connected to the spring reset block 4 through the locking rod 5. The spring reset block 4 is used to move the strip-shaped body 221 to the left to realize reset.

[0050] In this technical solution, the mounting holes on the connecting plate 24 are used to fix the limiting plate 22 and the connecting rod 26, thereby constructing a stable mechanical transmission system. When the limiting plate 22 is rotated by the lock cylinder 21, it transmits force to the connecting rod 26 through the connecting plate 24. The other end of the connecting rod 26 is connected to the bolt 32 through the locking rod 5, forming a continuous transmission chain. When the limiting plate 22 moves, it drives the bolt 32 to move accordingly through the connecting rod 26 and the locking rod 5. The connecting rod 26 is not only connected to the locking rod 5 and the bolt 32, but also connected to the spring return block 4 through the locking rod 5. The spring return block 4 uses the elastic force of the spring 42 to drive the strip body 221 to move to the left and return to its original position. When the bolt 32 retracts and opens the door, the spring return block 4 will push the strip body 221 to the left under the action of the spring 42, thereby causing the bolt 32 to extend and lock the door.

[0051] According to one embodiment of the present invention, the lock cylinder assembly 2 further includes a support plate, on which a lateral limiting post 27, a vertical limiting post 28, and a reset limiting post are provided, wherein: the lateral limiting post 27 is located in the lateral limiting groove and is used to cooperate with the limiting plate 22 for lateral limiting; the vertical limiting post 28 is located in the vertical limiting grooves on both sides and is used to cooperate with the sliding plate for vertical limiting; the reset limiting post is located at the end of the limiting pressure strip 25 and is used to cooperate with the sliding plate for vertical reset.

[0052] In this technical solution, the lateral limiting post 27 of the tray effectively constrains the lateral movement range of the lock cylinder assembly 2, ensuring that the limiting plate 22 can strictly follow the predetermined path for lateral movement; at the same time, the vertical limiting post 28 on the tray restricts the vertical movement range of the slide plate, allowing the slide plate to move vertically along the predetermined path; in addition, the reset limiting post on the tray is set at the end of the limiting pressure strip 25, and with the help of the reset force of the elastic element, it works in conjunction with the limiting pressure strip 25 and the slide plate to push the slide plate to accurately return to the initial position or reset state.

[0053] According to one embodiment of the present invention, the lock cylinder assembly 2 further includes a plug 29 located on the side of the support plate.

[0054] In this technical solution, the plug 29 located on the side of the tray serves to seal and protect the lock cylinder assembly 2. The plug 29 is made of waterproof material and is tightly fitted with the tray, thereby effectively preventing moisture, dust and other impurities from entering the interior of the lock cylinder assembly 2, ensuring the durability of the lock cylinder assembly 2.

[0055] According to one embodiment of the present invention, the spring reset block 4 includes a reset block body 41, and a spring 42 and a friction-reducing pad are installed inside the reset block body 41. The spring 42 cooperates with the locking rod 5 to reset the limiting plate 22, thereby driving the locking tongue 32 to extend. The friction-reducing pad is located between the locking rod 5 and the reset body.

[0056] In this technical solution, the friction-reducing pad is located between the locking rod 5 and the reset block body 41. Its main function is to reduce the frictional resistance of the locking rod 5 during movement. By reducing the coefficient of friction, the friction-reducing pad ensures that the locking rod 5 moves more smoothly and stably, thereby extending the service life of the door lock. To achieve good lubrication, the friction-reducing pad is usually made of a material with a low coefficient of friction and high wear resistance.

[0057] Example 2 Based on Example 1, such as Figures 1 to 11 As shown, this embodiment provides a method for a universal through-type lock cylinder sliding door, including the following steps: When the key is inserted into the lock cylinder 21 and the handle is rotated, the lock cylinder 21 moves the limiting plate 22 to the right. The limiting plate 22 moves the slide plate 23 upward through the upper protrusion 224. At the same time, the connecting plate 24 pulls the lock rod 5 through the connecting rod 26, causing the lock tongue 32 to retract by 18mm, which is used to realize long-stroke vertical opening and closing of the door. When the key is removed from the lock cylinder 21, the spring reset block 4 causes the limiting plate 22 to reset to the left via the lock rod 5. At the same time, the slide plate 23 resets downward under the action of the limiting pressure bar 25, and the lock tongue 32 extends again, restoring the locked state.

[0058] In this technical solution, the upper protrusion 224 on the limiting plate 22 interacts with the retaining strip 232 of the sliding plate 23, causing the sliding plate 23 to move upward. This action is synchronized with the action of the connecting plate 24 pulling the locking rod 5 through the connecting rod 26, together realizing the retraction of the bolt 32 and achieving long-stroke vertical opening and closing of the door. When the key is removed from the lock cylinder 21, the spring reset block 4 and the limiting pressure strip 25 begin to function. The spring reset block 4 pushes the limiting plate 22 to reset to the left, and the sliding plate 23 also resets downward under the guidance of the limiting pressure strip 25. Finally, the bolt 32 extends again, restoring the locked state.

[0059] It should be noted that the universal through-type lock cylinder refers to a common lock cylinder that uses a universal key to unlock, rather than a simple lock cylinder that is used specifically for trains. Therefore, the scope of lock cylinders applicable to this invention is quite broad.

[0060] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the invention should also be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the scope of the claims.

Claims

1. A universal through-type lock cylinder pull door lock, characterized in that, This includes a long-stroke lock housing, and lock cylinder assemblies and lock head assemblies located on both sides of the lock housing, wherein: The lock box includes a housing, in which a spring return block and a limiting block are provided in the middle. The spring return block and the limiting block are connected to the lock cylinder assembly and the lock head assembly respectively via a through lock rod. The lock cylinder assembly includes a lock cylinder, a limiting plate, a sliding plate, and a connecting plate. The lock cylinder abuts against the limiting plate and moves the limiting plate laterally via a torque lever. The limiting plate abuts against the bottom of the sliding plate and moves the sliding plate upward. One end of the connecting plate is connected to the limiting plate, and the other end of the connecting plate is connected to the lock rod via a connecting rod. The connecting plate and the limiting plate move laterally synchronously. A reset limiting strip is provided above the sliding plate. The lock assembly includes a lock body and a bolt disposed within the lock body, the bolt being connected to the end of the lock bar; The limiting plate includes a strip-shaped body located above the lock cylinder. The bottom of the strip-shaped body is provided with a lower groove that cooperates with the lock cylinder, which is used to be driven to move to the right by the lock cylinder. A transverse limiting hole is provided in the middle of the strip-shaped body to limit the transverse movement direction of the strip-shaped body. The top of the strip-shaped body is provided with an upper protrusion that cooperates with the sliding plate to drive the sliding plate to move upward. The lower groove is U-shaped with both sides inclined. Its left, middle and right sides are three different limiting points of the lock cylinder, which are used to drive the limiting plate and the sliding plate to different states. The upper protrusion includes protrusion I and protrusion II; when the lock cylinder abuts against the left side of the lower groove, protrusion I is limited to the edge strip; when the lock cylinder rotates clockwise, protrusion I disengages from the edge strip; when the lock cylinder abuts against the middle of the lower groove, protrusion I and protrusion II together lift the edge strip upward; when the lock cylinder continues to rotate clockwise and abuts against the right side of the lower groove, protrusion II is limited to the edge strip, and the edge strip falls back downward under the reset action of the limiting pressure strip; The slide includes a U-shaped body with a baffle strip on the top. The baffle strip cooperates with the upper protrusion of the limiting plate and is driven upward by the limiting plate. The limiting pressure strip abuts against the baffle strip and applies a preload to the baffle strip to make the U-shaped body move downward to reset. Vertical limiting holes are provided on both sides of the U-shaped body to restrict the vertical movement direction of the U-shaped body.

2. The universal through-type lock cylinder pull door lock as described in claim 1, characterized in that, The connecting plate is provided with mounting holes. The connecting plate is connected to the limiting plate and the connecting rod through the mounting holes. The connecting rod is connected to the lock tongue through the locking rod. The limiting plate drives the lock tongue to retract 18mm, which is used to realize long-stroke vertical opening and closing of the door. The connecting rod is connected to the spring reset block through the locking rod. The spring reset block is used to move the strip-shaped body to the left to achieve reset.

3. The universal through-type lock cylinder pull door lock as described in claim 1, characterized in that, The lock cylinder assembly also includes a support plate, which is provided with a lateral limiting post, a vertical limiting post and a reset limiting post. The lateral limiting post is located in the lateral limiting groove and is used to cooperate with the limiting plate for lateral limiting. The vertical limiting post is located in the vertical limiting grooves on both sides and is used to cooperate with the sliding plate for vertical limiting. The reset limiting post is located at the end of the limiting pressure strip and is used to cooperate with the sliding plate for vertical reset.

4. The universal through-type lock cylinder pull door lock as described in claim 3, characterized in that, The lock cylinder assembly also includes a plug located on the side of the support plate.

5. The universal through-type lock cylinder pull door lock as described in claim 1, characterized in that, The spring reset block includes a reset block body, in which a spring and a friction-reducing pad are installed. The spring cooperates with the locking rod to reset the limiting plate, thereby causing the locking tongue to extend. The friction-reducing pad is located between the locking rod and the reset block body.

6. A method for opening a universal through-type lock cylinder sliding door, employing the universal through-type lock cylinder sliding door lock as described in any one of claims 1-5, characterized in that, Includes the following steps: Insert the key into the lock cylinder, rotate the handle, and the lock cylinder will move the limit plate to the right; the limit plate will move the slide plate upward through the upper protrusion, and at the same time the connecting plate will pull the lock rod through the connecting rod, causing the lock tongue to retract 18mm, which is used to realize long stroke vertical opening and closing of the door; When the key is removed from the lock cylinder, the spring reset block causes the limit plate to reset to the left via the lock rod. At the same time, the slide plate resets downward under the action of the limit pressure bar, and the lock tongue extends again, restoring the locked state.

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