Adjustable side door handrail table structure and automobile

Abstract

The utility model provides a kind of adjustable side door handrail table structure and car belong to automobile technical field. Including handrail cover and lifting mechanism, lifting mechanism includes guide rail, screw rod and driving mechanism, guide rail is rotatably provided with worm wheel, screw rod is passed in worm wheel inner ring and is engaged with worm wheel inner ring, the top of screw rod and handrail cover bottom abut, driving mechanism is engaged with worm wheel outer ring by worm, and driving mechanism is configured as the worm that can be driven two-way rotation. It can solve the technical problem that the user driving comfort is insufficient caused by the structure of side door handrail fixed in existing car.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to an adjustable side door armrest structure and an automobile. Background Technology

[0002] In modern automotive interior design, the layout and configuration of the passenger compartment are always core considerations for improving driving and riding comfort and convenience. As a key component with direct and frequent interaction with passengers, the side door interior panels integrate multiple functional elements such as armrests, storage compartments, switch panels, and speaker covers. Among these, the side door armrest structure is particularly crucial, as it directly supports the passenger's elbows to alleviate fatigue during long journeys. Its design quality directly impacts the user's intuitive perception of the vehicle's interior quality and comfort.

[0003] Currently, the vast majority of mass-produced automobiles on the market use a one-piece molded or fixed installation structure for their side door armrests. Specifically, this structure is usually manufactured together with the door trim panel through injection molding, or rigidly fixed during subsequent assembly using bolts, clips, or other methods. Its shape, height, and angle are determined during the vehicle design phase and remain non-adjustable throughout the product lifecycle. This type of fixed armrest design is primarily based on standard ergonomic data, aiming to meet the general usage needs of most target user groups.

[0004] However, this fixed design approach also brings significant limitations. Due to substantial individual differences in vehicle users' height, arm length, and seating habits, a fixed armrest position cannot accommodate all users. For particularly tall or petite users, a standard armrest position may not provide effective and comfortable support for their elbows, and may even force them into an unnatural sitting posture, exacerbating fatigue. Therefore, existing automotive interiors, especially side door armrests, due to their non-adjustability, cannot meet personalized comfort needs, resulting in a poor user experience for some users with unusual body types. This has become a technical problem that urgently needs improvement in this field. Utility Model Content

[0005] This utility model provides an adjustable side door armrest structure and a car, which solves the technical problem of insufficient user driving comfort caused by the fixed side door armrest structure in existing cars. The technical solution is as follows: In a first aspect, this utility model embodiment provides an adjustable side door armrest structure, including: an armrest cover and a lifting mechanism. The lifting mechanism includes a guide rail, a screw, and a drive mechanism. A worm gear is rotatably disposed inside the guide rail. The screw passes through and meshes with the inner ring of the worm gear. The top of the screw abuts against the bottom of the handrail cover. The drive mechanism meshes with the outer ring of the worm gear through the worm gear. The drive mechanism is configured to drive the worm gear to rotate in both directions.

[0006] Optionally, the guide rail is embedded with a movable bearing, the outer ring of the movable bearing is connected to the guide rail, and the inner ring of the movable bearing is connected to the outer ring of the worm gear.

[0007] Optionally, two movable bearings are provided and are located on both sides of the worm gear in the extension direction of the guide rail. The worm gear has connecting ends protruding on both sides in the axial direction, and the connecting ends cooperate with the inner ring of the movable bearing on the corresponding side.

[0008] Optionally, the guide rail includes a connecting plate and two side plates symmetrically arranged on both sides of the connecting plate. The connecting plate is used to connect with the door of the car, and the two side plates have embedded grooves on their opposite sides that match the movable bearing.

[0009] Optionally, an operation panel is detachably connected to the handrail cover, and the operation panel is provided with an adjustment button for driving the worm gear to rotate in both directions.

[0010] Optionally, it also includes an auxiliary telescopic rod, the telescopic end of which is connected to the bottom of the handrail cover, and the auxiliary telescopic rod is configured to receive a signal from the adjustment button to drive the handrail cover to rise or fall.

[0011] Optionally, the auxiliary telescopic rod and the guide rail are respectively disposed on both sides of the operation panel.

[0012] Secondly, this utility model embodiment also provides a car, including the adjustable side door armrest structure described in the first aspect above, wherein the lifting mechanism is disposed inside the door of the car, and the armrest cover is movably disposed on the top of the armrest of the door.

[0013] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following: The adjustable side door armrest structure provided in this embodiment of the invention overcomes the limitation of traditional fixed armrests that can only meet 95% of ergonomic requirements by setting an adjustable armrest structure, realizing personalized height adjustment and significantly improving driving comfort and user experience. Utilizing the transmission characteristics of a worm gear mechanism, horizontal rotational motion is cleverly converted into vertical rotational motion, providing a power source for subsequent lifting and lowering movements. Simultaneously, the worm gear transmission has self-locking properties; when the drive mechanism stops working, the worm wheel cannot drive the worm in reverse, thus achieving self-locking at any position of the armrest cover without the need for an additional locking mechanism, improving structural reliability and reducing costs. The spiral lifting mechanism has a compact structure, smooth transmission, and can achieve precise height adjustment. Due to the large transmission ratio of the threaded pair, a small rotation angle can produce a significant lifting displacement, facilitating fine adjustment of the armrest height to meet the subtle differences in the needs of different users. It achieves electric intelligent control, convenient operation, and rapid response. Drivers and passengers do not need to manually adjust; height adjustment can be completed simply through the relevant adjustment mechanism on the armrest cover, enhancing the vehicle's technological and luxurious feel. The two-way control function allows the vehicle's side door armrests to be raised and lowered freely within their full range of motion, offering high flexibility in adjustment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the adjustable side door armrest structure provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the structure of the handrail cover plate provided in this embodiment of the utility model; Figure 3 This is a structural schematic diagram of the lifting mechanism provided in an embodiment of the present utility model.

[0016] In the diagram: 1-Handrail cover; 2-Lifting mechanism; 3-Auxiliary telescopic rod; 11-Operation panel; 12-Adjustment button; 21-Guide rail; 22-Screw; 23-Drive mechanism; 24-Worm gear; 25-Modible bearing; 211-Connecting plate; 212-Side plate; 213-Embedded groove; 231-Worm gear; 241-Connecting end. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the adjustable side door armrest structure provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the structure of the handrail cover plate provided in this embodiment of the utility model; Figure 3 This is a structural schematic diagram of the lifting mechanism provided in an embodiment of this utility model. Figures 1 to 3 As shown, this utility model embodiment provides an adjustable side door armrest structure, aiming to solve the technical problem of insufficient user driving comfort caused by the fixed side door armrest structure in existing automobiles. It includes: an armrest cover 1 and a lifting mechanism 2.

[0019] The handrail cover 1 is equipped with an adjustment button 12. The lifting mechanism 2 includes a guide rail 21, a screw 22, and a drive mechanism 23. A worm gear 24 is rotatably disposed inside the guide rail 21. The screw 22 passes through and meshes with the inner ring of the worm gear 24. The screw 22 is arranged along the extension direction of the guide rail 21, and its top abuts against the bottom of the handrail cover 1. The drive mechanism 23 meshes with the outer ring of the worm gear 24 via a worm 231. The drive mechanism 23 is configured to drive the worm 231 to rotate bidirectionally under the control of the signal from the adjustment button 12.

[0020] In this embodiment of the invention, the adjustable side door armrest structure is applied to the inside of a car's side door to provide elbow support for the driver and passengers. The structure includes an armrest cover 1 and a lifting mechanism 2. The armrest cover 1 is located at the armrest position of the car door, serving as a direct support surface for the driver's and passengers' elbows. An adjustment button 12 is provided on the armrest cover 1, allowing the driver and passengers to send a lifting control signal by operating the button 12. The lifting mechanism 2 is located inside the door, hidden within the door's internal space, and cooperates with the bottom of the armrest cover 1 to drive the armrest cover 1 to move vertically up and down. Through the action of the lifting mechanism 2, the armrest cover 1 can be vertically adjusted in height to accommodate the needs of drivers and passengers of different statures and usage habits. The lifting mechanism 2 includes a guide rail 21, a screw 22, and a drive mechanism 23, which together form a complete lifting transmission chain. A worm gear 24 is rotatably mounted within the guide rail 21. The worm gear 24 adopts a standard worm gear structure, with an inner ring and an outer ring. The outer ring has teeth that match the worm. The worm gear 24 can rotate around its own axis under the constraint of the guide rail 21, but is axially limited and fixed. The drive mechanism 23 meshes with the outer ring of the worm gear 24 via the worm 231. Specifically, the worm 231 is arranged perpendicular to the axis of the worm gear 24, and the helical teeth on the worm 231 precisely mesh with the teeth of the outer ring of the worm gear 24. When the drive mechanism 23 drives the worm 231 to rotate, the rotational motion of the worm 231 is converted into the rotational motion of the worm gear 24 through the meshing transmission of the worm gear pair. Utilizing the transmission characteristics of the worm gear mechanism, horizontal rotational motion is cleverly converted into vertical rotational motion, providing a power source for subsequent lifting and lowering movements. Meanwhile, the worm gear transmission has self-locking properties. When the drive mechanism 23 stops working, the worm wheel 24 cannot drive the worm 231 in reverse, thus realizing self-locking at any stroke position of the handrail cover plate 1 without the need for an additional locking mechanism, which improves structural reliability and reduces costs.

[0021] The screw 22 passes through the inner ring of the worm gear 24 and is arranged along the extension direction (i.e., the vertical direction) of the guide rail 21. The outer surface of the screw 22 is threaded, which engages with the internal thread of the inner ring of the worm gear 24 to form a threaded connection. The bottom of the screw 22 can be relatively fixed or limited, while its top abuts against the bottom of the handrail cover 1. When the worm gear 24 rotates under the action of the drive mechanism 23, the screw 22 undergoes axial displacement relative to the worm gear 24 due to the threaded connection. Specifically: when the worm gear 24 rotates in the forward direction, the screw 22 moves upward along the guide rail 21; when the worm gear 24 rotates in the reverse direction, the screw 22 moves downward. The top of the screw 22 always presses against the bottom of the handrail cover 1, therefore, the up-and-down movement of the screw 22 directly drives the handrail cover 1 to move up and down. The drive mechanism 23 is configured to receive signal control from the adjustment button 12 to drive the worm gear 231 to rotate bidirectionally. Specifically, the drive mechanism 23 is preferably a motor (such as a DC motor or a stepper motor), and the output shaft of the motor is connected to or integrally formed with the worm gear 231. The drive mechanism 23 is electrically connected to the adjustment button 12 via a circuit. When the driver or passenger presses the up button of the adjustment button 12, the drive mechanism 23 rotates in the forward direction; when the down button is pressed, the drive mechanism 23 rotates in the reverse direction; when the button is released, the drive mechanism 23 stops rotating.

[0022] The adjustable side door armrest structure provided in this embodiment of the invention overcomes the limitation of traditional fixed armrests that can only meet 95% of ergonomic requirements, achieving personalized height adjustment and significantly improving driving comfort and user experience. Utilizing the transmission characteristics of a worm gear mechanism, horizontal rotational motion is cleverly converted into vertical rotational motion, providing a power source for subsequent lifting and lowering movements. Simultaneously, the worm gear transmission has self-locking properties; when the drive mechanism 23 stops working, the worm wheel 24 cannot drive the worm 231 in reverse, thus achieving self-locking at any position of the armrest cover 1 without the need for an additional locking mechanism, improving structural reliability and reducing costs. The spiral lifting mechanism has a compact structure, smooth transmission, and can achieve precise height adjustment. Due to the large transmission ratio of the threaded pair, a small rotation angle can produce a significant lifting displacement, facilitating fine adjustment of the armrest height to meet the subtle differences in user needs. Electric intelligent control is implemented, offering convenient operation and rapid response. Drivers and passengers do not need to manually adjust the height; they can complete the adjustment simply by pressing a button, enhancing the vehicle's technological and luxurious feel. The two-way control function allows the vehicle's side door armrests to be raised and lowered freely within their full range of motion, offering high flexibility in adjustment.

[0023] Optionally, a movable bearing 25 is embedded in the guide rail 21. The outer ring of the movable bearing 25 is connected to the guide rail 21, and the inner ring of the movable bearing 25 is connected to the outer ring of the worm gear 24. Exemplarily, in this embodiment of the invention, to improve the smoothness of the rotation of the worm gear 24 and reduce frictional resistance, a movable bearing 25 is embedded in the guide rail 21. The movable bearing 25 is preferably a standard bearing structure such as a deep groove ball bearing or a needle roller bearing. The outer ring of the movable bearing 25 is connected to the guide rail 21, specifically through interference fit, bolt fixing, or snap ring locking, so that the movable bearing 25 remains fixed relative to the guide rail 21. The inner ring of the movable bearing 25 is connected to the outer ring of the worm gear 24, preferably through clearance fit or transition fit, so that the worm gear 24 can rotate freely relative to the inner ring of the movable bearing 25, while being supported and positioned radially. By setting the movable bearing 25, the sliding friction between the worm gear 24 and the guide rail 21 is transformed into rolling friction, significantly reducing transmission resistance and wear, and improving transmission efficiency and service life. Meanwhile, the movable bearing 25 provides precise radial positioning for the worm gear 24, avoiding radial runout and wobble of the worm gear during rotation, ensuring the stability of the meshing between the worm gear and the worm, reducing noise and vibration, and improving the smoothness of adjustment and user experience.

[0024] Optionally, two movable bearings 25 are provided, positioned on both sides of the worm gear 24 along the extension direction of the guide rail 21. The worm gear 24 has connecting ends 241 protruding from both sides in the axial direction, which engage with the inner rings of the corresponding movable bearings 25. Further, two movable bearings 25 are provided, positioned on the upper and lower sides of the worm gear 24 along the extension direction (i.e., the vertical direction) of the guide rail 21. Connecting ends 241 protrude from both sides of the worm gear 24 in the axial direction, with the outer diameter of the connecting ends 241 matching the inner diameter of the inner ring of the movable bearing 25, thus achieving a mating connection with the inner rings of the corresponding movable bearings 25. This dual-bearing support structure significantly improves the support rigidity and rotational stability of the worm gear 24. During lifting, the screw 22 generates axial and radial forces on the worm gear 24. The dual-bearing structure effectively bears and disperses these loads, preventing the worm gear axis from tilting or shifting, and ensuring that the threaded pair is always in the correct meshing state. Especially when the armrest cover 1 is subjected to greater pressure from the driver's elbow, the double bearing support can maintain transmission accuracy, prevent jamming, and improve the load-bearing capacity and reliability of the structure.

[0025] Optionally, the guide rail 21 includes a connecting plate 211 and two side plates 212 symmetrically arranged on both sides of the connecting plate 211. The connecting plate 211 is used to connect with the door body of the car, and the two side plates 212 have embedded grooves 213 that match the movable bearing 25 on their opposite sides. Exemplarily, in this embodiment of the present invention, the guide rail 21 includes a connecting plate 211 and two side plates 212 symmetrically arranged on both sides of the connecting plate 211. The connecting plate 211 has a flat plate structure, and its outer side (the side away from the worm gear 24) is used to connect and fix to the inner side of the car door. The connection method can be bolt connection, welding, snap-fit, or bonding. The two side plates 212 are arranged perpendicular to the connecting plate 211 and extend from both sides of the connecting plate 211 in the same direction to form a U-shaped or C-shaped groove structure. This groove space is used to accommodate the core components of the lifting mechanism, such as the worm gear 24, the movable bearing 25, and the screw 22. The inner surfaces of the two side plates 212 are provided with embedding grooves 213 that match the shape of the movable bearing 25. The grooves are straight grooves that extend in a direction perpendicular to the extension direction of the guide rail 21. The width of the grooves matches the thickness of the outer ring of the movable bearing. The movable bearing 25 is embedded into the embedding grooves 213 on both sides through the open sides of the two side plates 212 to complete the interference fit installation, which greatly simplifies the vehicle assembly process and improves production efficiency and assembly quality.

[0026] Optionally, an operation panel 11 is detachably connected to the armrest cover 1, and an adjustment button 12 is disposed on the operation panel 11. Exemplarily, in this embodiment of the present invention, an operation panel 11 is detachably connected to the armrest cover 1, and an adjustment button 12 is disposed on the operation panel 11. The operation panel 11 is detachably connected to the armrest cover 1 by means of clips, screws, or magnets, facilitating maintenance and replacement. The material of the operation panel 11 can be a piano lacquer panel, carbon fiber panel, solid wood panel, or brushed metal panel, etc., to coordinate with the vehicle interior style. The adjustment button 12 is preferably a touch button or a mechanical button, with two independent buttons for raising and lowering, or a rocker-type button that can be tossed up and down. Indicator lights can be provided on the button surface to display the working status or provide nighttime illumination. The detachable design of the operation panel 11 allows the adjustment button 12 and its internal circuit board to be replaced and repaired separately without disassembling the entire armrest cover 1 or the lifting mechanism 2, reducing maintenance costs and repair time. It also facilitates future upgrades, such as adding intelligent functions like seat memory linkage and voice control.

[0027] Optionally, an auxiliary telescopic rod 3 is also included. The telescopic end of the auxiliary telescopic rod 3 is connected to the bottom of the armrest cover 1. The auxiliary telescopic rod 3 is configured to receive signal control from the adjustment button 12 to drive the armrest cover 1 to rise and fall. Exemplarily, in this embodiment of the present invention, to further improve the smoothness and load-bearing capacity of the armrest cover 1 during rising and falling, this embodiment also includes an auxiliary telescopic rod 3. The auxiliary telescopic rod 3 is preferably an electric push rod or a pneumatic push rod, with its telescopic end (piston rod end) connected to the bottom of the armrest cover 1 and its fixed end connected to the inner side of the car door. The auxiliary telescopic rod 3 is configured to receive signal control from the adjustment button 12 and works synchronously with the drive mechanism 23 to drive the armrest cover 1 to rise and fall. Specifically, the control circuit of the auxiliary telescopic rod 3 and the control circuit of the drive mechanism 23 are connected in parallel to the adjustment button 12. When the adjustment button 12 sends a rising and falling signal, the drive mechanism 23 and the auxiliary telescopic rod 3 act simultaneously, jointly pushing or pulling the armrest cover 1 to rise and fall. Furthermore, the auxiliary telescopic rod 3 and the guide rail 21 (i.e., the lifting mechanism 2) are respectively arranged on both sides of the operation panel 11 in a symmetrical layout. For example, the lifting mechanism 2 is located on the left side of the operation panel 11, and the auxiliary telescopic rod 3 is located on the right side of the operation panel 11, or they are arranged symmetrically front and back.

[0028] A single lifting mechanism 2 can only provide one support point. When the pressure of the driver's elbow is not directly above the lifting mechanism 2, it will generate torque on the armrest cover 1, causing the armrest cover to tilt or wobble. Adding an auxiliary telescopic rod 3 creates dual-point or multi-point support, significantly improving the torsional stiffness of the armrest cover 1. Even under eccentric loads, the armrest cover 1 can remain horizontally stable. The dual drive system shares the weight of the armrest cover 1 and the driver's elbow, reducing the load on a single drive mechanism, extending the service life of various drive components (motor, worm gear, threaded pair, bearings, etc.), and improving the overall structural reliability. Simultaneously, it allows the armrest to withstand greater loads, adapting to scenarios involving heavier drivers or passengers or placing heavier items (such as water cups, mobile phones, etc.).

[0029] This utility model embodiment also provides an automobile, including Figures 1 to 3The adjustable side door armrest structure shown has a lifting mechanism 2 located inside the car door, and an armrest cover 1 movably mounted on the top of the door armrest. Exemplarily, in this embodiment, the lifting mechanism 2 is fixedly installed inside the front or rear door of the car via a connecting plate 211 of the guide rail 21, corresponding to the installation position of a traditional fixed armrest. The armrest cover 1 is movably mounted on the top of the door armrest, meaning its bottom is connected to the lifting mechanism 2, and its top protrudes outside the door, serving as the surface of the armrest. This design breaks away from the traditional fixed height design of car armrests, allowing drivers and passengers of different heights, arm lengths, and sitting postures to find the most suitable elbow support height, effectively relieving elbow fatigue and neck and shoulder pain during long-distance driving or riding, and significantly improving driving and riding comfort. Especially for users whose height falls outside the 95% ergonomic range (such as particularly tall or petite drivers and passengers), comfortable elbow support can finally be obtained, improving product inclusivity. The electrically adjustable armrest, as an intelligent feature, reflects the vehicle's technological sophistication and human-centered design, enhancing the product's perceived quality and competitive edge. In its class, this function serves as a highlight to attract consumers, boosting product appeal and brand image.

[0030] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility belongs. The terms “first,” “second,” and similar terms used in this utility patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described objects changes, the relative positional relationship may also change accordingly.

[0031] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable side door handrail table structure, characterized by, include: Handrail cover (1) and lifting mechanism (2). The lifting mechanism (2) includes a guide rail (21), a screw (22) and a drive mechanism (23). A worm gear (24) is rotatably arranged inside the guide rail (21). The screw (22) passes through the inner ring of the worm gear (24) and meshes with the inner ring of the worm gear (24). The top of the screw (22) abuts against the bottom of the handrail cover plate (1). The drive mechanism (23) meshes with the outer ring of the worm gear (24) through the worm (231). The drive mechanism (23) is configured to drive the worm (231) to rotate in both directions.

2. An adjustable side door handrail platform structure according to claim 1, wherein The guide rail (21) is embedded with a movable bearing (25). The outer ring of the movable bearing (25) is connected to the guide rail (21), and the inner ring of the movable bearing (25) is connected to the outer ring of the worm gear (24).

3. An adjustable side door handrail platform structure according to claim 2, wherein Two movable bearings (25) are provided and are located on both sides of the worm gear (24) in the extension direction of the guide rail (21). The worm gear (24) has connecting ends (241) protruding on both sides in the axial direction, and the connecting ends (241) cooperate with the inner ring of the movable bearing (25) on the corresponding side.

4. The adjustable side door armrest structure according to claim 2, characterized in that, The guide rail (21) includes a connecting plate (211) and two side plates (212) symmetrically arranged on both sides of the connecting plate (211). The connecting plate (211) is used to connect with the door of the car. The two side plates (212) have embedded grooves (213) that match the movable bearing (25) on their opposite sides.

5. An adjustable side door handrail platform structure according to claim 1, wherein An operation panel (11) is detachably connected to the armrest cover (1), and an adjustment button (12) is provided on the operation panel (11) for driving the worm gear (231) to rotate in both directions.

6. An adjustable side door handrail platform structure according to claim 5, wherein It also includes an auxiliary telescopic rod (3), the telescopic end of which is connected to the bottom of the handrail cover (1), and the auxiliary telescopic rod (3) is configured to receive the signal control of the adjustment button (12) to drive the handrail cover (1) to rise and fall.

7. An adjustable side door handrail platform structure according to claim 6, wherein The auxiliary telescopic rod (3) and the guide rail (21) are respectively located on both sides of the operation panel (11).

8. A vehicle comprising the adjustable door arm rest structure according to any one of claims 1 to 7, characterized in that, The lifting mechanism (2) is located inside the door of the vehicle, and the handrail cover (1) is movably located on the top of the handrail of the door.

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