Car type elevator

Abstract

The invention provides a car type elevator. The technical problem that potential safety hazards exist in a gap between the edge of a car door frame and the edge of a landing door frame is solved. A notch is formed in the bottom of a car door of the car elevator, a shaft body driven by a first motor to rotate is arranged in the car door, one end of a chain type covering assembly is wound around the shaft body, and the other end of the chain type covering assembly extends to the bottom of a car through the notch. The covering assembly is composed of a plurality of hinged cover plates, and a telescopic supporting plate driven by a spring is embedded in each cover plate. When the elevator stops and opens the door, the first motor drives the covering assembly to unfold and flatten the gap, and meanwhile, the supporting plate automatically pops up to completely cover the gap, so that seamless bridging is formed. When the door is closed, the supporting plate is retracted through the gear and toothed plate mechanism driven by the second motor, and then the whole assembly is rolled and stored through the first motor. Through the active and dynamic mechanical barrier, the risk that articles fall into the hoistway can be effectively avoided, and the using safety and reliability of the elevator are remarkably improved.

Description

Technical Field

[0001] This invention relates to an elevator, and more specifically to a cabin elevator. Background Technology

[0002] As a vertical transportation tool, the car elevator is widely used in various types of buildings. Its basic working principle is to drive the car up and down in the shaft through the traction system. After stopping at the target floor, the car door and the corresponding landing door open simultaneously to allow passengers or goods to enter and exit.

[0003] In existing technology, when the car stops at a landing, there is usually a vertical height difference (i.e., leveling error) between the floor plane of the car and the floor plane of the landing. More importantly, a gap extending horizontally is formed between the edge of the car door frame and the edge of the landing door frame. This gap is inevitable due to mechanical structure, safety redundancy, and installation tolerances, and its width varies from a few millimeters to tens of millimeters.

[0004] This structural gap presents significant safety hazards and inconveniences in actual use. Small items (such as keys, coins, mobile phones, stationery, etc.) can easily fall through the gap when passengers enter or exit, directly into the bottom of the elevator shaft. This not only causes property damage to users but may also impact and damage equipment inside the shaft (such as buffers, safety clamps, and sensors), or become stuck in moving parts, causing equipment malfunctions and affecting the normal operation of the elevator. Fallen items may require professional personnel to clean or repair the shaft, increasing maintenance costs and elevator downtime.

[0005] Currently, common measures to address this issue mainly focus on using warning signs, strengthening passenger safety education, or minimizing and standardizing the size of the gap during installation. However, these methods are all passive prevention and cannot fundamentally eliminate the risk of items falling. Summary of the Invention

[0006] In view of the technical problem in the prior art that there is a safety hazard due to the gap between the edge of the car door frame and the edge of the landing door frame, the present invention provides a car elevator in which a chain cover unit driven by a first motor automatically extends and retracts when the elevator stops, dynamically and effectively sealing the horizontal gap between the car and the landing, thereby avoiding the risk of objects accidentally falling into the shaft and improving safety and reliability.

[0007] The technical solution of this invention is:

[0008] A type of enclosed elevator, comprising:

[0009] The elevator car has an entrance / exit on one side;

[0010] The door is located at the entrance and exit of the car, and a slot extending laterally is provided at the bottom of one side.

[0011] A shaft is rotatably disposed inside the door, and the shaft's axis of rotation is arranged in a horizontal direction.

[0012] The covering assembly has a chain structure, with one end of the covering assembly located on the shaft and the other end passing through the slot and located at the bottom of the door.

[0013] A first motor is located inside the door. The output shaft of the first motor is poweredly connected to the shaft and is used to drive the shaft to rotate.

[0014] Optionally, the coverage component includes:

[0015] Multiple cover plates are connected by rotation to form the chain structure.

[0016] Optionally, one end of the cover plate is provided with a guide groove, and the cover assembly further includes:

[0017] Multiple support plates are correspondingly disposed on the cover plate, and the support plates and the cover plate form a telescopic structure;

[0018] A retraction assembly is provided on the door and near the slot. The retraction assembly can contact the support plate and drive the support plate into the guide slot.

[0019] A spring is used to drive the support plate to extend out of the guide groove;

[0020] Optionally, the top of the cover plate has a hollow structure and communicates with the guide groove, and the retraction component passes through the hollow structure to act on the support plate.

[0021] Optionally, the pullback component includes:

[0022] A toothed plate is disposed on the top of the support plate and located in the hollow structure;

[0023] A gear is rotatably disposed inside the compartment door, and the gear is capable of meshing with the toothed plate;

[0024] The second motor is used to drive the toothed plate to rotate.

[0025] Optionally, the gear has a long shaft structure, with one end of the gear extending horizontally through the slot and creating an effective gap with the side of the door.

[0026] When the elevator doors open, as the doors retract toward the side of the car, the dimension of the door entering the side of the car is greater than or equal to the effective distance.

[0027] Optionally, it may also include:

[0028] A fine-tuning component is located inside the door, and its fine-tuning part is connected to the retraction component to drive the retraction component to perform reciprocating linear motion in the vertical direction.

[0029] Optionally, the fine-tuning component includes:

[0030] The third motor is located inside the compartment door;

[0031] The screw is poweredly connected to the output shaft of the third motor;

[0032] The retraction assembly has a threaded hole that matches the screw.

[0033] Optionally, the cover plate is provided with a first slope, and the support plate has a second slope, with the first slope and the second slope located on both sides of the telescopic structure.

[0034] Optionally, it also includes:

[0035] The pressure roller is rotatably disposed inside the compartment door, and is located above the covering assembly and in contact with the top surface of the covering assembly.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] 1. Proactive safety, eliminating hidden dangers: The chain-type cover unit automatically extends and retracts via the first motor-driven shaft. When the car stops at a landing, the cover unit unfolds as the car door opens, extending horizontally to the landing threshold, precisely and reliably covering the horizontal gap between the car and the landing, physically blocking the path of small items falling into the shaft, and greatly improving the intrinsic safety level.

[0038] 2. Adaptive Adjustment and Strong Compatibility: The cover plate and support plate in the covering unit form a telescopic structure. With the cooperation of the spring and the retraction component, the support plate can extend or retract. Combined with the fine-tuning component, the system can intelligently adjust the overall thickness or extension length of the covering unit, thereby automatically adapting to different installation tolerances, wear conditions, or gap size changes caused by building settlement, ensuring long-term effective sealing.

[0039] 3. Stable operation and convenient maintenance: The device is directly integrated into the interior of the car door, without relying on floor modifications, and has strong versatility. The pressure roller guide and chain connection structure ensures a smooth and stable extension and retraction process, avoiding jamming. It avoids equipment damage and malfunctions caused by falling objects and the tedious shaft cleaning work, significantly reducing elevator maintenance costs and downtime due to malfunctions.

[0040] 4. Enhanced Experience and Reliability: Eliminating passenger concerns about gaps enhances the sense of security and experience when riding the elevator. The entire system has a compact structure, with power integrated inside the car door, ensuring reliable operation without affecting the elevator's original door opening and closing operations and operating efficiency, achieving a seamless integration of safety protection and basic elevator functions.

[0041] In summary, this technical solution, with its ingenious mechanical automation design, achieves dynamic and adaptive sealing of elevator door gap risks, making it an effective solution that integrates safety, reliability, adaptability, and economy. Attached Figure Description

[0042] 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, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the structure of the compartment door in this invention;

[0044] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0045] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0046] Figure 4 This is a schematic diagram of the three-dimensional structure of the covering unit;

[0047] Figure 5 This is a schematic diagram of the internal structure of the covering unit.

[0048] Figure label:

[0049] 10. Door; 20. Shaft; 30. Covering unit; 40. Fine-tuning assembly; 50. Pressure roller.

[0050] 11. Groove.

[0051] 31. Cover plate; 32. Support plate; 33. Retraction assembly; 34. Spring; 35. Guide groove; 36. First slope; 37. Second slope; 38. Baffle.

[0052] 331. Gear plate; 332. Gear; 333. Second motor.

[0053] 41. Third motor; 42. Screw. Detailed Implementation

[0054] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0055] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. 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. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0056] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0057] Example:

[0058] See Figure 1 and Figure 2 This embodiment discloses a car elevator, including a car (not shown in the figure), a car door 10, a shaft 20, a cover unit 30, and a first motor (not shown in the figure). One side of the car is an entrance / exit for passengers or goods. The car door 10 is slidably disposed at the entrance / exit of the car for opening and closing the entrance / exit. A slot 11 extending laterally (i.e., parallel to the width direction of the car door 10) is provided at the bottom of one side of the car door 10, and when the car door 10 is open or closed, the slot 11 is located at the bottom of the side of the car door 10 inside the entrance / exit.

[0059] The shaft 20 is rotatably mounted inside the car door 10 via a bearing housing and other structures. Its axis of rotation is horizontal, and the axial direction of the shaft 20 aligns with the passenger flow direction. The cover unit 30 is a rollable and unfoldable chain structure. One end is fixedly connected to the shaft 20, the middle portion passes through the slot 11 at the bottom of the car door 10, and the other end extends and connects to the bottom area of ​​the car. The first motor is fixedly installed inside the car door 10, and its output shaft is powered by the shaft 20 via a coupling, reducer, and other transmission components, thereby driving the shaft 20 to rotate in both forward and reverse directions.

[0060] In this embodiment, the first motor drives the shaft 20 to rotate, thereby controlling the winding or releasing of the chain-type covering unit 30. When the elevator car precisely stops at the floor level and the door needs to be opened, the control system can synchronously or sequentially start the first motor, driving the shaft 20 to rotate and releasing the covering unit 30 wound on the shaft 20 out of the car through the slot 11. The covering unit 30 extends horizontally and covers the inherent structural horizontal gap between the edge of the car floor and the edge of the landing floor. This directly and completely blocks the risk path of small objects (such as keys, coins, mobile phones, etc.) accidentally falling into the elevator shaft through this gap at the physical level, upgrading the traditional passive warning and passenger attention-dependent protection method to an active, reliable, and human-independent mechanical intrinsic safety protection, fundamentally eliminating safety hazards.

[0061] In one specific embodiment:

[0062] See Figure 4 and Figure 5 The covering unit 30 is formed by hinged multiple cover plates 31 in sequence. All cover plates 31 are preferably rectangular plate structures, and adjacent cover plates 31 are rotatably connected by hinges or similar hinge mechanisms through their longer sides, thereby forming a flexible and bendable chain-like whole.

[0063] This embodiment employs a chain structure with multiple cover plates 31 hinged together, giving the covering unit 30 excellent flexibility and retractability. When retracted, each cover plate 31 can be tightly wound onto the shaft 20, occupying little space and resulting in a compact structure. When unfolded, the chain structure can smoothly unfold along a straight path, forming a continuous covering plane. This ensures that the covering unit 30 can adapt to the dynamic working cycle of frequent elevator starts and stops and door opening and closing.

[0064] However, since the length of a single cover plate 31 is limited by the width of the slot 11 at the bottom of the door 10 (i.e., the width of the door 10 entrance and exit), when the chain structure is fully unfolded, there may still be a small remaining gap between the outermost edge of the cover plate 31 and the floor threshold, making it impossible to achieve a completely seamless cover.

[0065] Therefore, in one preferred embodiment, the covering unit 30 further includes a support plate 32, a retraction assembly 33, and a spring 34. Specifically, a guide groove 35 extending along the length of each cover plate 31 is provided inside one end (preferably the end of the cover plate 31 facing outwards in the inlet / outlet direction). The number of support plates 32 corresponds one-to-one with the number of cover plates 31, and each support plate 32 is slidably nested in the guide groove 35 of its corresponding cover plate 31, thereby forming a telescopic structure together with the cover plate 31.

[0066] Inside the guide groove 35, at least one spring 34 is provided. One end of the spring 34 is fixedly abutted against the inner end of the guide groove 35, and the other end is fixedly abutted against the end of the support plate 32 that extends into the guide groove 35. In its natural state, the elastic force of the spring 34 always acts on the support plate 32, driving it to extend outward from the cover plate 31.

[0067] The retraction assembly 33 is fixedly installed inside the door 10 and is located near the slot 11 at the bottom of the door 10. The retraction assembly 33 is configured to contact the support plate 32 that has moved into its range of action, thereby overcoming the elastic force of the spring 34 and driving the support plate 32 to retract into the guide groove 35 of its corresponding cover plate 31.

[0068] This technical solution solves the problem of blind spots caused by the fixed length limitation of the cover plate 31 by introducing a retractable support plate 32 structure, thereby achieving adaptive filling of the gap.

[0069] Specifically: When the car stops, the door 10 opens, and the cover unit 30 unfolds, each cover plate 31, carrying its internal support plate 32, moves out of the slot 11. Once the support plate 32 loses its external constraint (the constraint comes from the width limitation of the internal space of the door 10), the built-in spring 34 immediately releases its elasticity, pushing the support plate 32 outward from the end of the cover plate 31. The extended support plate 32 effectively extends the total length of the structural unit, allowing it to precisely overlap the landing threshold. This completely eliminates the last bit of gap between the end of the cover plate 31 and the landing, achieving complete, seamless physical coverage. Furthermore, the contact between the support plate 32 and the landing provides an additional support point for the entire cover unit 30, significantly enhancing its structural stability and support strength when passengers step on it or heavy objects pass by, preventing the middle of the cover unit 30 from sinking or deforming.

[0070] During the retraction phase, when the elevator needs to close the door, the retraction component 33 is activated. At the initial stage of the cover unit 30 retraction, it applies a force opposite to the force of the spring 34 to the exposed portion of the support plate 32, smoothly and orderly pushing the support plate 32 back into the guide groove 35 of the cover plate 31. This restores the total thickness of each telescopic structure to its minimum, ensuring that the entire chain structure can smoothly pass through the narrow slot 11 and retract into the interior of the car door 10 without jamming, collision, or wear due to the exposed support plate 32, thus guaranteeing the long-term reliability of the system.

[0071] In another specific embodiment:

[0072] The top of the cover plate 31 is configured with a hollow structure in the area corresponding to the guide groove 35. The width of the hollow structure is smaller than the width of the guide groove 35, allowing the interior of the guide groove 35 to communicate with the external space. The actuator of the retraction component 33 can pass through this hollow area and act directly on the support plate 32 located in the guide groove 35.

[0073] The top of the cover plate 31 is designed with a partial openwork, providing a direct and unobstructed channel for the retraction component 33. This makes the force transmission path between the retraction component 33 and the support plate 32 shorter and more direct, resulting in a faster and more precise action response. At the same time, it avoids setting complex movable cover plates 31 or mechanisms on the surface of the cover plate 31, simplifies the structure of the cover plate 31 body, improves its overall rigidity and durability as a load-bearing surface, and also facilitates cleaning and maintenance.

[0074] Preferably, the retraction assembly 33 specifically includes a toothed plate 331, a gear 332, and a second motor 333. The toothed plate 331 is fixedly mounted on the top of the support plate 32, with its toothed portion exposed upwards through the perforated area of ​​the cover plate 31. The gear 332 is rotatably mounted on the door 10 near the slot 11 via bearings. The mounting position of the gear 332 allows its teeth to mesh with the teeth of the toothed plate 331 when the support plate 32 moves with the cover plate 31 to a specific position. The second motor 333 is connected to the gear 332 for driving its precise rotation.

[0075] In this embodiment, the meshing transmission between gear 332 and toothed plate 331 is used as the retraction drive method, which has the advantages of precise and reliable power transmission and accurate control. Specifically:

[0076] The gear 332 meshing is a rigid transmission, transmitting large torque and exhibiting good synchronization, ensuring that the support plate 32 can be pulled back forcefully and accurately when needed, unaffected by uncertainties such as sliding friction. Furthermore, by controlling the rotation angle of the second motor 333, the retraction distance and speed of the support plate 32 can be precisely controlled, achieving perfect synchronization with the elevator door closing process.

[0077] In another preferred embodiment, gear 332 is designed as a long shaft structure with its teeth extending axially, and one end of gear 332 slightly protrudes horizontally from the slot 11 at the bottom of the car door 10 during installation. A small effective distance is maintained between the portion of gear 332 protruding from the slot 11 and the edge of the slot 11. Simultaneously, the elevator door opening mechanism is designed such that when the car door 10 is opened, the entire size of the car door 10 retracts into the car side wall by a dimension greater than or equal to the effective distance of gear 332 protruding from the slot 11.

[0078] This embodiment effectively solves the safety hazards and interference problems that moving parts may cause by concealing them. When the car door 10 is fully opened, because the side retraction distance of the car door 10 is large enough, the end of the gear 332 protruding from the slot 11 is hidden inside the side wall of the car, outside the field of vision and touch range of the passenger's normal passage area. This completely avoids the problem of the end of the gear 332 protruding during the door opening, which may snag on passengers' clothing, trip pedestrians, or cause visual fear. The entire device has no impact on passengers when it is in operation, improving user experience and safety.

[0079] In another specific embodiment:

[0080] See Figure 3 The elevator also includes a fine-tuning assembly 40. The fine-tuning assembly 40 is located inside the car door 10 and has a fine-tuning part that can make linear movements. The fine-tuning part is connected to the retraction assembly 33 (e.g., the mounting base for the gear 332) and is used to drive the entire retraction assembly 33 to make small-range reciprocating up and down movements in the vertical direction.

[0081] By introducing the fine-tuning component 40, the mechanical interference or collision between tooth tips that may occur in the meshing mechanism of gear 332 and tooth plate 331 during a specific motion phase is resolved.

[0082] Specifically, at the initial moment when the door 10 opens and the covering unit 30 begins to unfold outward, the fine-tuning component 40 drives the retraction component 33 (with gear 332) to rise a short distance, so that the teeth of gear 332 are completely disengaged from the teeth of the toothed plate 331 of the support plate 32, maintaining sufficient clearance. Thus, during the outward movement of the cover plate 31 and the support plate 32, the toothed plate 331 and gear 332 will not come into contact or collide, avoiding noise, wear, and potential mechanical damage.

[0083] When the door 10 needs to be closed and the covering unit 30 is ready to retract, the fine-tuning component 40 activates before the retraction action begins, driving the retraction component 33 to descend along with the gear 332. This ensures that the teeth of the gear 332 accurately engage with the teeth of the gear plate 331, restoring the meshing state. Subsequently, the second motor 333 starts, smoothly retracting the support plate 32. This improves the reliability and smoothness of the system operation.

[0084] In addition, the fine-tuning component 40 can also be used to compensate for mechanical wear or slight changes in installation tolerances that may occur after long-term use. By fine-tuning the initial meshing depth between the gear 332 and the toothed plate 331, the transmission is always kept in the best state.

[0085] Preferably, the fine-tuning component 40 includes a third motor 41 and a screw 42. The third motor 41 is fixed inside the door 10, and its output shaft drives a vertically arranged screw 42 to rotate via a coupling. A threaded hole matching the screw 42 is machined on the mounting base of the retraction component 33. The screw 42 is screwed into this threaded hole, and when the third motor 41 drives the screw 42 to rotate forward and backward, it can be converted into the up-and-down linear motion of the mounting base of the retraction component 33.

[0086] In this embodiment, fine-tuning is achieved using a motor and screw 42, resulting in a compact structure that is easily integrated into the thin space of the door 10. Simultaneously, the screw 42 transmission offers advantages such as high precision and good self-locking performance, accurately converting motor rotation into linear displacement and reliably locking at any position, ensuring absolute stability of gear 332 when it needs to remain disengaged or engaged. This solution is simple to control, responds quickly, and is a reliable mechanical execution solution for achieving the aforementioned anti-collision and precise engagement functions.

[0087] In another specific embodiment:

[0088] On both sides of the telescopic structure formed by the cover plate 31 and the support plate 32, there are sloping surfaces. Specifically, a first slope 36 is provided on the outer end edge of the cover plate 31, and a second slope 37 is provided on the outer edge of the extended end of the support plate 32. When the support plate 32 is partially extended, the first slope 36 and the second slope 37 are located at the front and rear edges of the combined structure, respectively.

[0089] In this embodiment, the double-slope structure can balance human-centered safety and smooth passage. Specifically, it can eliminate tripping risks and provide guidance and protection.

[0090] The ramp creates a smooth transition surface, rather than a vertical step. When a passenger's feet, wheelchair wheels, or luggage wheels move from the car floor across the cover unit 30 to the landing floor, or vice versa, the ramp guides a smooth transition, completely avoiding tripping or bumping caused by minor height differences or protruding edges. Additionally, the ramp helps guide the cover unit 30 to contact the landing threshold or the edge of the slot 11 during deployment and retraction, reducing direct collisions and scratches. Furthermore, the smooth ramp is less prone to accumulating dust and debris, making cleaning easier.

[0091] In another specific embodiment:

[0092] The elevator also includes at least one pressure roller 50. The pressure roller 50 is rotatably mounted inside the car door 10 via a pivot and a bracket, positioned inside the car door 10 and above the cover plate 31 near the slot 11. The rim of the pressure roller 50 remains in contact with the top surface of the chain-structured cover unit 30 and can roll along its length.

[0093] In this embodiment, the pressure roller 50 serves to provide precise guidance and clamping.

[0094] Specifically, during the telescopic movement of the covering unit 30, the pressure roller 50 applies a moderate downward pressure, confining its movement within a pre-set track space. This effectively prevents the lightweight, flexible chain structure from bouncing, warping, or deviating during rapid movement, ensuring it remains aligned with the slot 11 and its movement trajectory is accurate. Simultaneously, the rolling contact of the pressure roller 50 transforms the sliding friction between the covering unit 30 and the door 10 structure into rolling friction, significantly reducing operating resistance, noise, and wear, and improving the overall operating efficiency and service life of the mechanism. Furthermore, at the end of the winding process, the pressure roller 50 helps to smoothly and neatly press the final section of the covering unit 30 into and guide it onto the shaft 20, ensuring tight and orderly winding.

[0095] In another specific embodiment:

[0096] A baffle 38 is provided on the top of the cover plate 31 along its length. The length of the baffle 38 is approximately half the length of the cover plate 31, and the baffle 38 is positioned to cover the area above the top of the support plate 32.

[0097] After the support plate 32 extends out of the guide groove 35, an unobstructed space is formed between the guide groove 35 and the end of the support plate 32. By setting the baffle 38, foreign objects can be prevented from falling into this unobstructed space. Without the baffle 38, small foreign objects such as pebbles and gravel may fall into this space, and long-term accumulation may cause the support plate 32 to become stuck during extension and retraction, affecting its function or even damaging the mechanism. The presence of the baffle 38 fundamentally eliminates the risk of such foreign objects intruding into the critical moving parts.

[0098] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A type of enclosed elevator, characterized in that, include: The elevator car has an entrance / exit on one side; The door is located at the entrance and exit of the car, and a slot extending laterally is provided at the bottom of one side. A shaft is rotatably disposed inside the door, and the shaft's axis of rotation is arranged in a horizontal direction. The covering assembly has a chain structure, with one end of the covering assembly located on the shaft and the other end passing through the slot and located at the bottom of the door. A first motor is located inside the door. The output shaft of the first motor is poweredly connected to the shaft and is used to drive the shaft to rotate.

2. The elevator car according to claim 1, characterized in that, The coverage component includes: Multiple cover plates are connected by rotation to form the chain structure.

3. The elevator car according to claim 2, characterized in that, One end of the cover plate is provided with a guide groove, and the covering assembly further includes: Multiple support plates are correspondingly disposed on the cover plate, and the support plates and the cover plate form a telescopic structure; A retraction assembly is provided on the door and near the slot. The retraction assembly can contact the support plate and drive the support plate into the guide slot. A spring is used to drive the support plate to extend out of the guide groove.

4. The elevator car according to claim 3, characterized in that, The top of the cover plate has a hollow structure and is connected to the guide groove. The retraction component passes through the hollow structure and acts on the support plate.

5. The elevator car according to claim 4, characterized in that, The pullback component includes: A toothed plate is disposed on the top of the support plate and located in the hollow structure; A gear is rotatably disposed inside the compartment door, and the gear is capable of meshing with the toothed plate; The second motor is used to drive the toothed plate to rotate.

6. The elevator car according to claim 5, characterized in that, The gear has a long shaft-shaped structure, with one end of the gear extending horizontally through the slot and creating an effective gap with the side of the door. When the elevator doors open, as the doors retract toward the side of the car, the dimension of the door entering the side of the car is greater than or equal to the effective distance.

7. The elevator car according to claim 3, characterized in that, Also includes: A fine-tuning component is located inside the door, and its fine-tuning part is connected to the retraction component to drive the retraction component to perform reciprocating linear motion in the vertical direction.

8. The elevator car according to claim 7, characterized in that, The fine-tuning component includes: The third motor is located inside the compartment door; The screw is poweredly connected to the output shaft of the third motor; The retraction assembly has a threaded hole that matches the screw.

9. The elevator car according to claim 3, characterized in that, The cover plate has a first slope, and the support plate has a second slope. The first slope and the second slope are located on both sides of the telescopic structure.

10. The elevator car according to any one of claims 1-9, characterized in that, Also includes: The pressure roller is rotatably disposed inside the compartment door, and is located above the covering assembly and in contact with the top surface of the covering assembly.

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