Elevator handrail

Abstract

The utility model discloses a kind of lifting handrails, comprising: fixed seat, for with seat frame connection;Handrail seat, it is sleeved in fixed seat and can be lifted relative to fixed seat;Metal sheet, between fixed seat and handrail seat and respectively connected in fixed seat and handrail seat, metal sheet is arc structure and has elasticity, to resist the inner wall surface of handrail seat and produce damping when handrail seat is lifted. Adopt elastic metal sheet to provide damping, simple structure, easy to install, effectively solve the problem that traditional handrail lifts without damping, poor stability, can reduce lifting degree attenuation, make lifting process smooth and stable, improve use hand feeling and operation accuracy, reduce cost and failure risk.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a height-adjustable armrest. Background Technology

[0002] In modern seating design, height-adjustable armrests are widely used in various chair products, such as office chairs and lounge chairs, to meet the personalized needs of different users for armrest height and improve comfort and convenience. However, existing height-adjustable armrest technology lacks effective damping design in the process of achieving the height adjustment function. When a user applies a lifting force to the armrest, it can rise or fall quickly and without obstruction. This lack of damping makes it difficult for users to precisely control the height of the armrest, easily leading to over-adjustment and preventing the armrest from being adjusted to a suitable height, seriously affecting the user experience and operational stability. In addition, due to the lack of damping cushioning, the rapid raising and lowering of the armrest may also generate significant impact and noise, not only reducing user comfort but also potentially affecting the lifespan of the armrest.

[0003] To address these issues, some lifting handrails utilize damping blocks to provide resistance. These damping blocks are typically installed at specific locations between the handrail seat and the fixed base, generating resistance during handrail raising and lowering through their material properties or structural design. However, these damping blocks often have complex structures, generally composed of multiple components of different shapes and functions, requiring precise machining and assembly to achieve the desired damping effect. This complex structure not only increases the manufacturing difficulty and cost of the damping blocks themselves but also places higher demands on the overall handrail assembly process, leading to reduced production efficiency and increased production costs. Furthermore, the complex damping block structure makes repair and replacement more difficult, increasing subsequent maintenance costs and time. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a lifting handrail that uses an elastic metal sheet to provide damping. It has a simple structure and is easy to install, effectively solving the problems of traditional handrails having no damping feel and poor stability during lifting. It can reduce the attenuation of lifting force, make the lifting process smooth and stable, improve the user feel and operation accuracy, and reduce costs and failure risks.

[0005] A lifting handrail according to an embodiment of the present utility model includes: A mounting base for connecting to a seat frame; An armrest seat is fitted onto the fixed base and can be raised and lowered relative to the fixed base; A metal sheet is located between the fixed base and the armrest base and is connected to the fixed base and the armrest base respectively. The metal sheet has a curved structure and is elastic, so as to press against the inner wall surface of the armrest base and generate damping when the armrest base is raised and lowered.

[0006] A lifting handrail according to an embodiment of the present invention has at least the following beneficial effects: the handrail seat is sleeved on a fixed base and can be raised and lowered relative to the fixed base. This basic lifting function design meets the actual requirements of users to adjust the height of the handrail according to their own needs. The metal sheet adopts a curved structure and has elasticity, giving the metal sheet unique functional characteristics. When the handrail seat is raised or lowered, the metal sheet can press against the inner wall surface of the handrail seat and generate a damping effect based on its own elastic characteristics. During the raising or lowering of the handrail seat, the elastic deformation of the metal sheet generates resistance in the opposite direction of movement, thereby providing the necessary damping force for the raising and lowering of the handrail. This allows users to feel obvious resistance feedback when operating the handrail to raise or lower, avoiding the unobstructed and overly smooth raising and lowering experience of traditional undamped handrails. This allows users to more accurately control the raising and lowering position of the handrail, adjust the handrail to a height that meets their own needs, and greatly improve the stability of use and the accuracy of operation. Meanwhile, the metal sheet has a simple structure, achieving damping function solely through its curved structure and connection with the fixed base and armrest seat. Compared to the complex damping blocks used in existing technologies, this greatly simplifies the internal structure of the armrest. This not only reduces the manufacturing difficulty and production cost of the armrest but also reduces the risk of failure that may arise from complex structures, thus improving the overall reliability of the armrest. Furthermore, due to the simple structure of the metal sheet and its stable contact with the armrest seat, it can effectively reduce the attenuation of lifting force during long-term use. Compared to complex damping blocks, which are prone to wear and deformation leading to a gradual decrease in lifting force, the metal sheet can maintain stable elasticity over a longer period, continuously providing uniform and smooth damping force for armrest lifting. This ensures that the lifting force of the armrest remains in a relatively stable state, and the smooth lifting force further enhances the stability of the armrest's lifting function, providing users with a more comfortable and smooth operating experience.

[0007] According to some embodiments of the present invention, a lifting handrail is provided, wherein the metal sheet is mounted on the fixed base.

[0008] According to some embodiments of this utility model, a lifting handrail is provided with two spaced-apart limiting grooves on the outer side wall of the fixed base. The metal sheet includes a first curved mounting part and a second curved mounting part, which extend into the two limiting grooves in a one-to-one correspondence.

[0009] According to some embodiments of the present invention, a lifting handrail is provided in which two limiting grooves are arranged at intervals along the lifting direction of the handrail seat.

[0010] According to some embodiments of this utility model, a lifting handrail is provided in which the first curved mounting part and the second curved mounting part abut against the groove surface of the limiting groove. The limiting groove is square and has a closed-loop structure to restrict the first curved mounting part and the second curved mounting part from disengaging from the limiting groove.

[0011] According to some embodiments of the present invention, a lifting handrail is provided, wherein the metal sheet further includes a pushing part, the two ends of which are integrally connected to the first curved mounting part and the second curved mounting part, respectively, and the outer surface of the pushing part abuts against the inner wall surface of the handrail seat.

[0012] According to some embodiments of the present invention, a lifting handrail is provided in which both the first curved mounting portion and the second curved mounting portion are bent toward the center of the pushing portion.

[0013] According to some embodiments of the present invention, a lifting handrail is provided, wherein the pushing part has an arc-shaped structure.

[0014] According to some embodiments of the present invention, a lifting handrail includes a pushing part comprising a first inclined section, a vertical section, and a second inclined section connected in sequence. The end of the first inclined section opposite to the vertical section is integrally connected to the first curved mounting part, and the end of the second inclined section opposite to the vertical section is integrally connected to the second curved mounting part.

[0015] According to some embodiments of this utility model, a lifting handrail is provided, wherein a first damping rubber ring and a second damping rubber ring are fixedly installed on the outer periphery of the fixed base. The first damping rubber ring and the second damping rubber ring are respectively located on the upper and lower sides of the metal sheet. The first damping rubber ring and the second damping rubber ring are both pressed against the inner wall surface of the handrail base and generate damping when the handrail base is raised or lowered.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded structural diagram of a lifting handrail according to an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of a lifting handrail according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of a metal sheet for a lifting handrail according to an embodiment of the present invention.

[0018] Explanation of icon numbers: Fixed base 100; limiting groove 101; first damping rubber ring 110; second damping rubber ring 120; Armrest seat 200; Metal sheet 300; first curved mounting part 310; second curved mounting part 320; pushing part 330; first inclined section 331; vertical section 332; second inclined section 333. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] In modern seating design, height-adjustable armrests are widely used in various chair products, such as office chairs and lounge chairs, to meet the personalized needs of different users for armrest height and improve comfort and convenience. However, existing height-adjustable armrest technology lacks effective damping design in the process of achieving the height adjustment function. When a user applies a lifting force to the armrest, it can rise or fall quickly and without obstruction. This lack of damping makes it difficult for users to precisely control the height of the armrest, easily leading to over-adjustment and preventing the armrest from being adjusted to a suitable height, seriously affecting the user experience and operational stability. In addition, due to the lack of damping cushioning, the rapid raising and lowering of the armrest may also generate significant impact and noise, not only reducing user comfort but also potentially affecting the lifespan of the armrest.

[0025] To address these issues, some lifting handrails utilize damping blocks to provide resistance. These damping blocks are typically installed at specific locations between the handrail seat and the fixed base, generating resistance during handrail raising and lowering through their material properties or structural design. However, these damping blocks often have complex structures, generally composed of multiple components of different shapes and functions, requiring precise machining and assembly to achieve the desired damping effect. This complex structure not only increases the manufacturing difficulty and cost of the damping blocks themselves but also places higher demands on the overall handrail assembly process, leading to reduced production efficiency and increased production costs. Furthermore, the complex damping block structure makes repair and replacement more difficult, increasing subsequent maintenance costs and time.

[0026] Therefore, such as Figures 1 to 3As shown, this utility model proposes a lifting armrest, which includes a fixed seat 100 for connecting to a seat frame, an armrest seat 200 sleeved on the fixed seat 100 and capable of lifting relative to the fixed seat 100, and a metal sheet 300 located between the fixed seat 100 and the armrest seat 200 and connected to the fixed seat 100 and the armrest seat 200 respectively. The metal sheet 300 has a curved structure and is elastic, so as to press against the inner wall surface of the armrest seat 200 and generate damping when the armrest seat 200 is lifted. It should be noted that the armrest seat 200 is fitted onto the fixed base 100 and can be raised and lowered relative to the fixed base 100. This basic raising and lowering function design meets the actual requirements of users to adjust the armrest height according to their own needs. The metal plate 300 adopts an arc structure and has elasticity, giving it unique functional characteristics. When the armrest seat 200 is raised or lowered, the metal plate 300 can press against the inner wall of the armrest seat 200 and generate a damping effect based on its own elasticity. During the raising or lowering of the armrest seat 200, the elastic deformation of the metal plate 300 generates resistance in the opposite direction of movement, thus providing the necessary damping force for the raising and lowering of the armrest. This allows users to feel obvious resistance feedback when operating the armrest raising and lowering, avoiding the unobstructed and overly smooth raising and lowering experience of traditional undamped armrests. This allows users to more accurately control the raising and lowering position of the armrest, adjusting it to a height that meets their needs, greatly improving the stability and accuracy of use. At the same time, the metal plate 300 has a curved structure and is elastic, giving it unique functional characteristics. The metal plate 300 has a simple structure, achieving damping function solely through its curved structure and connection with the fixed base 100 and the armrest base 200. Compared to the complex damping blocks used in existing technologies, this greatly simplifies the internal structure of the armrest. This not only reduces the manufacturing difficulty and production cost of the armrest but also reduces the risk of failure that may arise from complex structures, thus improving the overall reliability of the armrest. Furthermore, due to the simple structure of the metal plate 300 and its stable contact with the armrest base 200, it can effectively reduce the attenuation of lifting force during long-term use of the armrest. Compared to the wear and deformation problems that easily occur with complex damping blocks, leading to a gradual decrease in lifting force, the metal plate 300 can maintain stable elasticity over a longer period of time, continuously providing uniform and smooth damping force for the armrest's lifting and lowering. This ensures that the lifting force of the armrest remains in a relatively stable state, and the smooth lifting force further enhances the stability of the armrest's lifting function, providing users with a more comfortable and smooth operating experience.

[0027] Optionally, the metal sheet is fixedly installed on the inner wall of the armrest seat and rises and falls together with the armrest seat (not shown in the figure). In other embodiments, the metal sheet armrest is floating between the fixed seat and the armrest seat, and can move relative to both the fixed seat and the armrest seat (not shown in the figure). In order to further optimize the structural stability and damping reliability of the lifting armrest, in some embodiments of this utility model, the metal sheet 300 is installed on the fixed seat 100, which can ensure that the position of the metal sheet 300 is fixed and forms a stable connection with the stationary fixed seat 100, avoiding displacement or offset of the metal sheet 300 during the lifting and lowering of the armrest, thereby ensuring that the metal sheet 300 can always accurately press against the inner wall surface of the armrest seat 200 and generate a uniform damping force. Compared to installing the metal plate 300 in other locations such as the armrest seat 200, the fixing base 100 typically has a larger installation space and a more stable structural foundation, making the installation of the metal plate 300 more secure and less prone to loosening due to long-term use or external forces. This not only simplifies the fit between the metal plate 300 and the armrest seat 200 but also enhances the overall integrity of the lifting handrail structure, making the transmission of damping force more direct and stable. This further improves the feel and stability of the handrail during lifting and lowering, while reducing the risk of damping failure or abnormal wear due to insecure installation of the metal plate 300. Specifically, refer to... Figures 1 to 3In some embodiments of this utility model, the outer wall of the fixing base 100 is provided with two spaced-apart limiting grooves 101. The metal sheet 300 includes a first curved mounting portion 310 and a second curved mounting portion 320, which extend into the two limiting grooves 101 in a one-to-one correspondence. Through the cooperation between the limiting grooves 101 and the curved mounting portions, the metal sheet 300 can be installed quickly and accurately, while significantly improving the reliability of the connection between the metal sheet 300 and the fixing base 100. It can be understood that the two spaced-apart limiting grooves 101 provide clear installation positioning points for the metal sheet 300, so that the metal sheet 300 can be inserted into the corresponding limiting grooves 101 by the first curved mounting portion 310 and the second curved mounting portion 320 respectively during installation, forming a stable snap-fit ​​structure. There is no need for complicated assembly processes; the installation can be completed simply by aligning the curved mounting portion of the metal sheet 300 with the limiting groove 101 and pushing it in, which greatly simplifies the assembly process and reduces production costs. Meanwhile, the spaced arrangement of the limiting grooves 101 can evenly distribute the pressure exerted by the metal sheet 300 on the armrest seat 200, making the damping force more balanced during the lifting and lowering process of the armrest seat 200, and avoiding the problem of uneven lifting and lowering caused by excessive or insufficient local resistance. Optionally, the two limiting grooves 101 are arranged at intervals along the lifting and lowering direction of the armrest seat 200, further optimizing the damping control effect of the metal sheet 300 on the lifting and lowering process of the armrest seat 200. The limiting grooves 101, spaced apart along the lifting direction, allow the first curved mounting portion 310 and the second curved mounting portion 320 of the metal plate 300 to connect to the fixed base 100 at different heights. This creates a segmented damping support effect along the lifting path of the armrest seat 200. When the armrest seat 200 rises or falls, the pushing portion 330 of the metal plate 300 dynamically adjusts its contact pressure with the inner wall as the armrest seat 200 moves, making the damping force more uniform and linear throughout the lifting stroke. This segmented layout effectively avoids the problem of concentrated or abrupt damping force caused by a single mounting point, resulting in a smoother and more stable lifting process for the armrest seat 200. Furthermore, the limiting grooves 101 arranged along the lifting direction better adapt to the actual movement trajectory of the armrest seat 200, ensuring that the metal plate 300 provides consistent damping feedback at different heights. This further improves the user's accuracy in controlling the lifting force and reduces lifting jamming or abnormal noise caused by uneven damping. Furthermore, both the first curved mounting portion 310 and the second curved mounting portion 320 abut against the groove surface of the limiting groove 101. The limiting groove 101 is square and has a closed-loop structure to prevent the first curved mounting portion 310 and the second curved mounting portion 320 from disengaging from the limiting groove 101.The closed-loop structure and square cross-section design of the limiting groove 101 significantly improve the firmness and anti-detachment performance of the metal sheet 300. This allows the curved mounting part to form a multi-directional abutment and positional restriction with the groove surface after being engaged in the limiting groove 101. This effectively limits the lateral movement, longitudinal detachment, or rotational loosening of the metal sheet 300 during lifting and lowering, preventing it from detaching or misaligning due to force during handrail lifting and lowering, thus further ensuring the stability and durability of the damping effect. It should be noted that the closed-loop limiting groove 101 further enhances the constraint capability of the groove edge, preventing the curved mounting part from sliding out of the groove opening due to excessive force. This structural design not only achieves reliable installation and positioning of the metal sheet 300 without additional fasteners, but also maintains the connection stability between the metal sheet 300 and the fixing seat 100 during long-term use, avoiding damping failure or abnormal handrail lifting function caused by accidental detachment of the metal sheet 300.

[0028] Refer to Figure 2 and Figure 3In some embodiments of this utility model, the metal sheet 300 includes a pushing portion 330, the two ends of which are integrally connected to the first curved mounting portion 310 and the second curved mounting portion 320, respectively. The outer surface of the pushing portion 330 presses against the inner wall surface of the armrest seat 200. Using the pushing portion 330 as the core functional component of the metal sheet 300, its integral connection with the first curved mounting portion 310 at one end and the second curved mounting portion 320 at the other end ensures efficient force transmission, allowing the elastic deformation of the metal sheet 300 to be concentrated on the contact area between the pushing portion 330 and the inner wall surface of the armrest seat 200. In application, when the armrest seat 200 rises and falls, the outer surface of the pushing portion 330 is tightly fitted against the inner wall surface, and the elastic deformation of the metal sheet 300 generates resistance opposite to the direction of movement, thereby providing a smooth and stable damping feel during the rising and falling process. Furthermore, the integrated structural design avoids assembly errors or loose connections that may exist with separate components, ensuring that the pushing part 330 is always in the optimal force-bearing position, continuously providing uniform pressure to the armrest seat 200. In addition, the presence of the pushing part 330 makes the damping function of the metal sheet 300 more concentrated and efficient, achieving a significant damping effect without relying on complex auxiliary structures, further simplifying the overall structure, and improving the controllability of the lifting force and the stability of the feel. In some embodiments of this utility model, both the first curved mounting part 310 and the second curved mounting part 320 are bent towards the center of the pushing part 330. This further optimizes the ease of installation and elastic deformation capability of the metal sheet 300. Understandably, the bending direction towards the center of the pushing part 330 allows the first curved mounting part 310 and the second curved mounting part 320 to form a structure similar to an "angle" after installation. When the metal sheet 300 is installed in the limiting groove 101 of the fixed seat 100, this bending design can pre-tighten the metal sheet 300 with a certain elastic force, making the pushing part 330 fit more tightly against the inner wall of the armrest seat 200, thus making it easier and more stable to install the metal sheet 300 in the limiting groove 101. During the lifting and lowering process of the armrest seat 200, the bent mounting part will undergo elastic deformation as the pushing part 330 is subjected to force, further amplifying the elastic feedback of the metal sheet 300, thereby enhancing the dynamic response capability of the damping force. This structure not only improves the pressure stability of the metal sheet 300 against the inner wall of the armrest seat 200, but also makes the damping force more linear with the change of lifting and lowering movements, avoiding damping abrupt changes or force attenuation caused by uneven deformation. Meanwhile, the bending design can also reduce redundant swaying of the metal sheet 300 when it is not in operation, improve the stability of the handrail when it is stationary, and further improve the user experience. In some other embodiments, one of the first bent mounting part and the second bent mounting part is bent along the side toward the center of the pushing part, and the other is bent along the side away from the center of the pushing part, forming an opposite bending structure (not shown in the figure).In some other embodiments, both the first curved mounting portion and the second curved mounting portion are bent toward the side away from the center of the pushing portion, forming a back-bending structure (not shown in the figure).

[0029] Furthermore, the shape of the thrust section 330 is optimized, and then referred to... Figure 2 The push-off part 330 has an arc-shaped structure. This arc shape optimizes the contact method between the push-off part 330 and the inner wall of the armrest seat 200, and improves the uniformity of damping force distribution. Firstly, the arc-shaped push-off part 330 can form a larger contact area with the inner wall of the armrest seat 200, allowing the elastic deformation force of the metal sheet 300 to be more evenly transmitted to a larger area of ​​the inner wall, avoiding pressure concentration or uneven damping caused by localized contact. Secondly, the arc-shaped surface design can adapt to minor unevenness that may exist on the inner wall of the armrest seat 200, automatically adjusting the contact point through its own deformation capacity to ensure a continuous and stable output of damping force. Furthermore, the arc-shaped structure can more smoothly guide the elastic deformation direction of the metal sheet 300 under stress, reducing stress concentration caused by sharp angles or abrupt changes in curvature, thereby extending the service life of the metal sheet 300 and reducing the risk of fatigue deformation or breakage due to long-term use. This design not only improves the consistency of damping effect but also enhances the compatibility between the metal plate 300 and the armrest seat 200, further improving the overall reliability and user experience of the lifting armrest. (Refer to...) Figure 3In some embodiments of this utility model, the pushing part 330 includes a first inclined section 331, a vertical section 332, and a second inclined section 333 connected in sequence. The end of the first inclined section 331 facing away from the vertical section 332 is integrally connected to the first curved mounting part 310, and the end of the second inclined section 333 facing away from the vertical section 332 is integrally connected to the second curved mounting part 320. The segmented inclined structure further refines the damping force adjustment capability of the pushing part 330 on the inner wall of the armrest seat 200. The inclination angles of the first inclined section 331 and the second inclined section 333 can guide the metal sheet 300 to naturally form a pre-tightening force during installation, making the pushing part 330, especially the vertical section 332, fit more tightly against the inner wall of the armrest seat 200. When the armrest seat 200 rises and falls, the combined structure of the inclined section and the vertical section 332 can dynamically adjust the contact pressure according to different rising and falling directions. For example, when the armrest seat 200 rises and falls, the first inclined section 331 and the second inclined section 333 disperse part of the force through changes in the inclination angle, while the vertical section 332 provides the main vertical damping force. In this regard, the inclined section can smoothly transition the resistance change through the inclined plane guiding effect. This segmented design makes the damping force more linear and controllable throughout the entire rising and falling stroke, avoiding the problem of sudden resistance changes or jamming caused by single-plane contact. In addition, the connection structure of the inclined section and the vertical section 332 can also enhance the overall rigidity of the pushing part 330, prevent the risk of failure due to excessive local deformation, and further improve the stability and durability of the damping function of the metal sheet 300.

[0030] Refer to Figure 1 and Figure 2In some embodiments of this utility model, a first damping rubber ring 110 and a second damping rubber ring 120 are fixedly installed on the outer periphery of the fixed base 100. The first damping rubber ring 110 and the second damping rubber ring 120 are respectively located on the upper and lower sides of the metal sheet 300. Both the first damping rubber ring 110 and the second damping rubber ring 120 press against the inner wall surface of the armrest seat 200 and generate damping when the armrest seat 200 is raised or lowered. By adding elastic damping rubber rings made of materials such as rubber or silicone, a composite damping structure is formed with the metal sheet 300, further improving the damping effect and adaptability of the lifting armrest. It can be understood that the first damping rubber ring 110 and the second damping rubber ring 120, respectively located on the upper and lower sides of the metal sheet 300, can cover a wider range of lifting strokes of the armrest seat 200, complementing the damping force of the metal sheet 300. In application, the metal sheet 300 provides linear damping based on metal elasticity, while the damping rubber rings provide additional cushioning and flexible damping through viscoelastic properties. Furthermore, this composite design allows for precise control during low-to-medium speed lifting, primarily relying on the metal sheet 300 for damping. During rapid lifting or impact, the damping rubber ring absorbs energy through rubber deformation, reducing impact noise and vibration and improving user comfort. In addition, the elastic material of the damping rubber ring adapts to minute changes in the inner wall of the armrest seat 200, maintaining stable contact pressure through elastic deformation and avoiding localized failures that might occur due to the metal sheet 300's sole damping. Moreover, the damping rubber ring is simple and inexpensive to install, synergistically enhancing the structure of the metal sheet 300 and further optimizing the overall performance and user experience of the lifting armrest without significantly increasing overall complexity.

[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A lifting handrail, characterized in that, include: A mounting base for connecting to a seat frame; An armrest seat is fitted onto the fixed base and can be raised and lowered relative to the fixed base; A metal sheet is located between the fixed base and the armrest base and is connected to the fixed base and the armrest base respectively. The metal sheet has a curved structure and is elastic, so as to press against the inner wall surface of the armrest base and generate damping when the armrest base is raised and lowered.

2. A lifting handrail according to claim 1, characterized in that: The metal sheet is mounted on the fixing base.

3. A lifting handrail according to claim 2, characterized in that: The outer wall of the fixed base is provided with two spaced limiting grooves. The metal sheet includes a first curved mounting part and a second curved mounting part, which extend into the two limiting grooves in a one-to-one correspondence.

4. A lifting handrail according to claim 3, characterized in that: The two limiting grooves are arranged at intervals along the lifting direction of the armrest seat.

5. A lifting handrail according to claim 3, characterized in that: Both the first curved mounting part and the second curved mounting part abut against the groove surface of the limiting groove. The limiting groove is square and has a closed-loop structure to prevent the first curved mounting part and the second curved mounting part from disengaging from the limiting groove.

6. A lifting handrail according to any one of claims 3 to 5, characterized in that: The metal sheet also includes a pushing part, the two ends of which are integrally connected to the first curved mounting part and the second curved mounting part, respectively, and the outer surface of the pushing part is pressed against the inner wall surface of the armrest seat.

7. A lifting handrail according to claim 6, characterized in that: Both the first curved mounting portion and the second curved mounting portion are bent toward the center of the pushing portion.

8. A lifting handrail according to claim 6, characterized in that: The pushing part has an arc-shaped structure.

9. A lifting handrail according to claim 6, characterized in that: The pushing part includes a first inclined section, a vertical section and a second inclined section connected in sequence. The end of the first inclined section opposite to the vertical section is integrally connected to the first curved mounting part, and the end of the second inclined section opposite to the vertical section is integrally connected to the second curved mounting part.

10. A lifting handrail according to claim 1, characterized in that: A first damping rubber ring and a second damping rubber ring are fixedly installed on the outer periphery of the fixed base. The first damping rubber ring and the second damping rubber ring are respectively located on the upper and lower sides of the metal sheet. The first damping rubber ring and the second damping rubber ring are both pressed against the inner wall surface of the armrest seat and generate damping when the armrest seat is raised and lowered.

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