Height-adjustable wear-resistant sun umbrella

Abstract

The application relates to the technical field of outdoor tools, and discloses a height-adjustable wear-resistant sun umbrella, which comprises a umbrella frame, a umbrella surface, a first rod body, a second rod body and a locking assembly, the umbrella surface is laid on the surface of the umbrella frame, one end of the first rod body is connected with the umbrella frame, the second rod body is internally provided with an accommodating cavity, the first rod body is inserted into the accommodating cavity and is in sliding connection with the inner wall of the accommodating cavity, the locking assembly comprises an operating piece and a limiting piece, the operating piece is sleeved on the periphery of the first rod body and is in sliding connection with the first rod body, the first limiting piece is connected with the second rod body and is in abutment with the first rod body, the operating piece is in abutment with the limiting piece to change the adjustment state of the friction force between the limiting piece and the first rod body. The operating piece is in abutment with the limiting piece, and the friction force between the limiting piece and the first rod body is greater than the sum of the gravity of the first rod body, the umbrella frame and the umbrella surface, so that the first rod body can be locked, the operation difficulty is reduced, and the adjustment efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of outdoor equipment, specifically to an adjustable height wear-resistant parasol. Background Technology

[0002] A parasol, also called a sun umbrella, is mainly used to block direct sunlight. It is used in summer and can effectively isolate ultraviolet rays from damaging the skin. The important indicators of a parasol are its ultraviolet protection factor (UVB), size, weight, handle material, fabric material, number of frames, and folded length. Generally, the higher the UVB, the stronger the ability to block ultraviolet rays, and the larger the size, the larger the area covered by the parasol.

[0003] To provide better sun protection, most existing sun umbrellas have a large canopy, which often requires height adjustment during use. This makes them inconvenient to extend or retract, increasing the difficulty of operation for users and reducing work efficiency. Summary of the Invention

[0004] In view of this, the present invention provides an adjustable height wear-resistant parasol to solve the problem that parasols often require height adjustment during use, have the disadvantage of being inconvenient to extend and retract, increase the difficulty of operation for users, and reduce work efficiency.

[0005] Firstly, this application provides an adjustable height wear-resistant parasol, comprising: Umbrella frame; The umbrella canopy is laid on the surface of the umbrella frame; The first pole is connected at one end to the umbrella frame; The second rod has a receiving cavity inside, and the first rod is inserted into the receiving cavity and slidably connected to the inner wall of the receiving cavity; The locking assembly includes an operating member and a limiting member. The operating member is sleeved on the outer periphery of the first rod body and is slidably connected to the first rod body. The first limiting member is connected to the second rod body and abuts against the first rod body. The operating member has an adjustment state for abutting against the limiting member to change the frictional force between the limiting member and the first rod body.

[0006] Beneficial effects: By sliding the first rod inside the second rod, the height of the umbrella frame fixed on the first rod can be adjusted. After adjusting to the required height, the operating part is slid towards the limiting part so that the operating part abuts against the limiting part, and the friction between the limiting part and the first rod is greater than the sum of the weights of the first rod, the umbrella frame, and the umbrella surface, thus locking the first rod, reducing the difficulty of operation, and improving the adjustment efficiency.

[0007] In one optional embodiment, the locking assembly further includes a body, which is sleeved on the outer periphery of the second rod and fixedly connected to the second rod. The body is connected to the limiting member. The body has an external thread, and the operating member has a first groove with an internal thread on the inner wall of the first groove. In the adjustment state, the operating member is threadedly connected to the body, and the inner wall of the first groove abuts against the limiting member.

[0008] Beneficial effects: The external thread of the main body and the internal thread of the first groove of the operating part are engaged, and the inner wall of the first groove abuts against the limiting part. When the operating part is tightened, the limiting part is squeezed to increase the friction between the limiting part and the first rod body, so that the limiting part locks the first rod body and prevents the first rod body from continuing to slide down.

[0009] In one optional embodiment, the main body is provided with a first through hole, the first through hole including a variable diameter section and a fixed section connected to each other, the variable diameter section having a large diameter end and a small diameter end, the diameter of the variable diameter section decreasing sequentially from the large diameter end to the small diameter end, the limiting member including a variable diameter part and a boss part, at least part of the variable diameter part extending beyond the large diameter end, the inner wall of the fixed section having a second groove, the boss part passing through the small diameter end and engaging in the second groove; and the fixed section is sleeved on the outer periphery of the second rod body and fixedly connected to the second rod body.

[0010] Beneficial effects: The variable diameter section of the first through hole (with the diameter decreasing from the large diameter end to the small diameter end) is adapted to the variable diameter part of the limiting member. When the operating member abuts against the limiting member, the variable diameter section can form a guiding compression on the variable diameter part, causing the limiting member to move evenly towards the first rod body to hold the first rod body tightly, ensuring stable friction and a more durable locking effect. The second groove of the fixing section engages with the boss part, confining the limiting member within the main body and preventing the limiting member from falling off or being lost during adjustment as the operating member slides.

[0011] In one alternative embodiment, the limiting member is provided with a second through hole, and the limiting member is elastic.

[0012] Beneficial effects: The limiting component has a second through hole and is elastic. When squeezed, it can achieve uniform contraction through the deformation space of the second through hole, and fit more tightly against the outer wall of the first rod.

[0013] In one alternative embodiment, the limiting member has a notch that extends through the variable diameter portion and the boss portion along the extending direction of the first through hole.

[0014] Beneficial effects: The notch extends along the first through hole, penetrating the variable diameter section and the boss section, providing greater deformation space for the limiting component. During extrusion, the limiting component can achieve greater contraction by opening or closing the notch, more tightly wrapping the first rod body. The presence of the notch allows the limiting component to be quickly fitted onto the outer periphery of the first rod body by opening the notch, without needing to penetrate from the end of the rod body. This adapts to space-constrained scenarios during umbrella rod assembly (scenarios where the first rod body is already connected to the umbrella frame and parts cannot be assembled from the end), simplifying the assembly process and improving production efficiency. The through-type design of the notch can disperse stress concentration during the deformation of the limiting component, avoiding excessive local stress that could cause cracking of the limiting component, extending the service life of the elastic limiting component, and ensuring that it can quickly return to its original shape after each deformation, maintaining stable locking performance.

[0015] In one optional embodiment, the limiting member has a latching portion and a engaging portion spaced apart, the latching portion and the engaging portion engaging to enclose and form the second through hole.

[0016] Beneficial effect: When the first pole is fixed to the umbrella frame and the integral limiting piece cannot be fitted from the end, the snap-fit ​​part and the snap-fit ​​part can be snap-fitted and assembled from the side of the pole.

[0017] In one alternative embodiment, an auxiliary wheel is further included, which is sleeved on the outer periphery of the operating member and fixedly connected to the operating member, wherein the radius of the auxiliary wheel is twice the radius of the operating room.

[0018] Beneficial effects: The auxiliary wheel is fixed to the outer circumference of the operating part, and its radius is twice that of the operating part. According to the lever principle, the required force can be greatly reduced when rotating the auxiliary wheel. It is especially suitable for users with less strength (such as the elderly and children), or for situations where the operating part becomes stuck due to wear after long-term use, thus improving the ease of operation.

[0019] In one optional embodiment, the umbrella material comprises, from the inside out, a flexible aerogel insulation coating, an aerogel composite textile fabric layer, and a UV-resistant coating.

[0020] Beneficial effects: The flexible aerogel insulation coating on the inner layer of the umbrella effectively blocks external heat transfer to the area beneath the umbrella, thanks to the high air content and low density of aerogel. The middle layer, an aerogel composite textile fabric, combines the thermal insulation properties of aerogel with the flexibility and abrasion resistance of textile fabric. It can withstand greater folding and tensile stress, is less prone to cracking after long-term folding use, and resists damage caused by daily friction, extending the lifespan of the umbrella. The outer UV-protective coating directly blocks ultraviolet radiation, preventing damage to human skin. Simultaneously, this coating also prevents UV rays from damaging the inner aerogel insulation coating, solving the problem of aerogel aging and decreased thermal insulation performance due to long-term UV exposure, ensuring the long-term stability of the umbrella's thermal insulation effect. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the adjustable height wear-resistant sun umbrella of the present invention; Figure 2 This is a cross-sectional view of the adjustable height wear-resistant sun umbrella of the present invention; Figure 3 This is a cross-sectional view of the main body of the adjustable height wear-resistant sun umbrella of the present invention; Figure 4 This is a schematic diagram of the limiting component in the adjustable height wear-resistant sun umbrella of the present invention; Figure 5 for Figure 2 A magnified view of a portion of circle A in the center.

[0023] Explanation of reference numerals in the attached figures: 101. Umbrella frame; 102. Umbrella canopy; 201. First rod; 202. Second rod; 301, Operating component; 3011, First groove; 3012, Internal thread; 302, Limiting component; 3021, Variable diameter section; 30211, Large diameter end; 30212, Small diameter end; 3022, Boss section; 3023, Second through hole; 303, Main body; 3031, External thread; 3032, First through hole; 30321, Variable diameter hole section; 30322, Fixed hole section; 30323, Second groove; 304, Auxiliary wheel. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0028] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are also within the protection scope of the present invention.

[0029] This application mainly adopts a sliding connection between the first rod 201 and the second rod 202, and a locking component to achieve flexible height adjustment of the parasol. This allows the parasol to be adapted to users of different heights and usage scenarios, and the adjustment is convenient and stable. The following is a further detailed description of this application. Example

[0030] The adjustable height wear-resistant sun umbrella provided in this application embodiment, such as Figures 1 to 5As shown, the umbrella includes an umbrella frame 101, an umbrella canopy 102, a first rod 201, a second rod 202, and a locking assembly. The first rod 201 is inserted into the receiving cavity of the second rod 202 and slidably connected to the inner wall of the receiving cavity, enabling flexible adjustment of the umbrella height to suit users of different heights or different usage scenarios. The operating component 301 of the locking assembly is slidably connected to the first rod 201, and the limiting component 302 is connected to the second rod 202 and abuts against the first rod 201. The operating component 301 can abut against the limiting component 302 to change the friction between the limiting component 302 and the first rod 201, thereby locking or unlocking the first rod 201. Compared with existing adjustment methods, this reduces the difficulty of operation and improves the adjustment efficiency. Furthermore, the limiting component 302, which is always abutting against the first rod 201, provides basic friction to ensure the stability of the umbrella after the height is fixed.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the umbrella frame 101 is a crucial structure supporting the umbrella canopy 102. It can be made of various materials, such as aluminum alloy, which is lightweight and high-strength; or carbon fiber, which is even lighter and more corrosion-resistant. The umbrella frame 101 is typically radially shaped and consists of multiple frame strips connected together by connectors to form a stable frame structure. The umbrella canopy 102 is laid on the surface of the umbrella frame 101, providing sun protection for the user.

[0032] like Figure 1 and Figure 2 As shown, one end of the first rod 201 is connected to the umbrella frame 101. It can be a solid rod or a hollow rod. Using a hollow rod reduces weight while maintaining sufficient strength. The surface of the first rod 201 should be smooth to reduce friction with the inner wall of the cavity containing the second rod 202, facilitating sliding adjustment. The second rod 202 has a cavity into which the first rod 201 is inserted and slidably connected to the inner wall. The material of the second rod 202 can be the same as that of the first rod 201, or a different material can be selected according to actual needs. To ensure smooth sliding of the first rod 201, the inner wall of the cavity should also be smoothed.

[0033] like Figure 3 , Figure 4 and Figure 5As shown, the locking assembly includes an operating member 301 and a limiting member 302. The operating member 301 is sleeved on the outer periphery of the first rod 201 and slidably connected to it. The operating member 301 can be an annular structure, with its inner wall conforming to the outer periphery of the first rod 201, allowing it to slide freely on the first rod 201. The operating member 301 can be made of plastic, which is low-cost and easy to process; or it can be made of metal, which is more robust and durable. The limiting member 302 is connected to the second rod 202 and abuts against the first rod 201. The limiting member 302 can be an elastic annular structure; its abutment against the first rod 201 generates friction, thereby fixing the position of the first rod 201. The limiting member 302 can be made of rubber, which has good elasticity and friction; or it can be made of silicone, which is softer and corrosion-resistant. In the adjusted state, the operating member 301 abuts against the limiting member 302. By changing the position of the operating member 301, the friction between the limiting member 302 and the first rod 201 can be changed, thereby locking or unlocking the first rod 201.

[0034] The implementation principle of this embodiment is as follows: Through the sliding connection structure between the first rod 201 and the second rod 202, the height of the parasol can be flexibly adjusted to meet the needs of users of different heights and in different usage scenarios. The combination of the operating component 301 and the limiting component 302 in the locking assembly allows for easy adjustment of the friction between the limiting component 302 and the first rod 201 simply by sliding the operating component 301, simplifying the locking operation and improving ease of use. Simultaneously, the limiting component 302 always abuts against the first rod 201, providing basic friction and ensuring the stability of height adjustment. Compared to existing parasols, this embodiment significantly improves the flexibility, convenience, and stability of height adjustment, solving the problems existing in the prior art.

[0035] like Figure 3 , Figure 4 and Figure 5 As shown, the locking assembly also includes a main body 303, which is sleeved on the outer periphery of the second rod 202 and fixedly connected to the second rod 202. The main body 303 is connected to the limiting member 302. The main body 303 is provided with an external thread 3031, and the operating member 301 is provided with a first groove 3011. The inner wall of the first groove 3011 is provided with an internal thread 3012. In the adjustment state, the operating member 301 is threadedly connected to the main body 303, and the inner wall of the first groove 3011 abuts against the limiting member 302.

[0036] The main body 303 can be a cylindrical structure, and its material can be metal, such as stainless steel, which has high strength and corrosion resistance. The main body 303 is sleeved on the outer periphery of the second rod 202 and is fixedly connected to the second rod 202 by welding, interference fit, or other methods to ensure a firm connection. The external thread 3031 of the main body 303 mates with the internal thread 3012 on the inner wall of the first groove 3011 of the operating member 301, so that the sliding of the operating member 301 is converted into a controllable thread screwing in / out. The first groove 3011 of the operating member 301 can be an annular groove, and the internal thread 3012 on its inner wall is adapted to the external thread 3031 of the main body 303.

[0037] The implementation principle of this embodiment is as follows: The addition of a main body 303 associates the limiting member 302 with the main body 303, preventing the limiting member 302 from shifting position due to long-term use or external impact, thus enhancing the structural stability of the locking assembly. The engagement between the external thread 3031 of the main body 303 and the internal thread 3012 of the first groove 3011 of the operating member 301 transforms the sliding of the operating member 301 into a controllable threaded in / out motion, achieving a precise and long-lasting locking effect. Compared to a simple sliding contact structure, the locking is more secure and avoids the "loosening" problem caused by vibration. Simultaneously, the main body 303 is sleeved and fixed to the second rod 202, and the limiting member 302 is directly connected to the main body 303, simplifying the assembly process, reducing production assembly difficulty, improving mass production efficiency, and facilitating the disassembly and replacement of parts during subsequent maintenance.

[0038] like Figure 3 and Figure 5As shown, the main body 303 is provided with a first through hole 3032, which includes a variable diameter section 30321 and a fixed section 30322 connected to each other. The variable diameter section 30321 has a large diameter end 30211 and a small diameter end 30212. The diameter of the variable diameter section 30321 decreases sequentially from the large diameter end 30211 to the small diameter end 30212. The limiting member 302 includes a variable diameter part 3021 and a boss part 3022. At least part of the variable diameter part 3021 extends out of the large diameter end 30211. A second groove 30323 is provided on the inner wall of the fixed section 30322. The boss part 3022 passes through the small diameter end 30212 and is engaged in the second groove 30323. The fixed section 30322 is sleeved on the outer periphery of the second rod 202 and is fixedly connected to the second rod 202. The design of the variable-diameter hole section 30321 allows the limiting member 302 to move evenly towards the first rod body 201 along the inclined surface of the variable-diameter hole section 30321 when pressed by the operating member 301. The large-diameter end 30211 of the variable-diameter hole section 30321 facilitates the installation of the limiting member 302, while the small-diameter end 30212 guides and compresses the limiting member 302. The second groove 30323 on the inner wall of the fixing hole section 30322 engages with the protrusion 3022 of the limiting member 302, confining the limiting member 302 within the main body 303 and preventing it from slipping off with the operating member 301 during adjustment. The fixing hole section 30322 is fitted onto the outer periphery of the second rod body 202 and is fixedly connected to the second rod body 202 by welding, adhesive bonding, or other methods, increasing the contact area between the main body 303 and the second rod body 202 and enhancing the connection strength.

[0039] The implementation principle of this embodiment is as follows: The variable diameter section 30321 of the first through hole 3032 is adapted to the variable diameter part 3021 of the limiting member 302. When the operating member 301 abuts against the limiting member 302, the variable diameter section 30321 can form a "guided extrusion" on the variable diameter part 3021, optimizing the stress state of the limiting member 302 and improving the locking reliability. The second groove 30323 of the fixing section 30322 engages with the boss part 3022 of the limiting member 302, realizing the precise positioning and anti-dislodgement of the limiting member 302. The fixing section 30322 is sleeved and fixed on the outer periphery of the second rod 202, enhancing the connection strength between the main body 303 and the second rod 202, and can withstand the axial tension and radial force when the first rod 201 is adjusted, thus improving the stability of the entire umbrella rod structure.

[0040] like Figure 4 and Figure 5As shown, the limiting member 302 is provided with a second through hole 3023, and the limiting member 302 is elastic. The design of the second through hole 3023 provides deformation space for the limiting member 302. When the limiting member 302 is compressed, it can achieve uniform contraction through the deformation of the second through hole 3023, thus fitting more tightly against the outer wall of the first rod 201. The elastic material of the limiting member 302 can be elastic plastic or rubber alloy, which have good elasticity and wear resistance. The elastic limiting member 302 can adapt to minor machining errors on the surface of the first rod 201 or slight wear after long-term use, ensuring stable friction and avoiding the situation of "not locking tightly". At the same time, when the elastic limiting member 302 slides in contact with the first rod 201, it can buffer the impact force between the two, reduce wear caused by rigid friction, and extend the service life of the first rod 201 and the limiting member 302.

[0041] The implementation principle of this embodiment is as follows: the limiting member 302 is provided with a second through hole 3023 and is elastic, which improves the deformation adaptability of the limiting member 302 and optimizes the locking effect. The elastic limiting member 302 can adapt to the surface condition of the first rod 201, ensuring stable friction and avoiding locking failure. At the same time, the elastic material reduces the wear between the limiting member 302 and the first rod 201, extending the service life of the parts. In addition, the design of the second through hole 3023 reduces the material usage of the limiting member 302, lowers production costs, and the elastic material facilitates mold forming during mass production, improving production efficiency.

[0042] like Figure 2 and Figure 5 As shown, it also includes an auxiliary wheel 304, which is fitted around the outer periphery of the operating component 301 and fixedly connected to it. The radius of the auxiliary wheel 304 is twice the radius of the operating component 301. The auxiliary wheel 304 can be a circular structure, and its material can be plastic or metal. The auxiliary wheel 304 is fitted around the outer periphery of the operating component 301 and fixedly connected to it by means of adhesive bonding, snap-fit ​​connection, etc. Since the radius of the auxiliary wheel 304 is twice the radius of the operating component 301, according to the lever principle, rotating the auxiliary wheel 304 can significantly reduce the required force, especially suitable for users with less strength. The outer periphery of the auxiliary wheel 304 can be designed with anti-slip textures, such as stripes or granular protrusions, to increase the friction between the hand and the wheel and prevent hand slippage during adjustment.

[0043] In this embodiment, the umbrella surface 102 material comprises, from the inside out, a flexible aerogel insulation coating, an aerogel composite textile fabric layer, and a UV-resistant coating. The flexible aerogel insulation coating of the umbrella surface 102, leveraging the high air content and low density of aerogel, effectively blocks external heat transfer to the area under the umbrella, thus improving the heat insulation effect. The aerogel composite textile fabric layer combines the heat insulation properties of aerogel with the flexibility and abrasion resistance of textile fabric, enhancing the abrasion resistance and durability of the umbrella surface 102. The UV-resistant coating directly blocks ultraviolet radiation, preventing damage to human skin, and also isolates the inner aerogel insulation coating from UV damage, ensuring the long-term stability of the heat insulation effect of the umbrella surface 102.

[0044] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A height-adjustable, wear-resistant sun umbrella, characterized in that, include: Umbrella frame (101); The umbrella canopy (102) is laid on the surface of the umbrella frame (101); The first rod (201) is connected at one end to the umbrella frame (101); The second rod (202) has a receiving cavity inside, and the first rod (201) is inserted into the receiving cavity and slidably connected to the inner wall of the receiving cavity; The locking assembly includes an operating member (301) and a limiting member (302). The operating member (301) is sleeved on the outer periphery of the first rod (201) and slidably connected to the first rod (201). The limiting member (302) is connected to the second rod (202) and abuts against the first rod (201). The operating member (301) has an adjustment state for abutting against the limiting member (302) to change the frictional force between the limiting member (302) and the first rod (201).

2. The adjustable height wear-resistant sun umbrella according to claim 1, characterized in that, The locking assembly further includes a main body (303), which is sleeved on the outer periphery of the second rod (202) and fixedly connected to the second rod (202). The main body (303) is connected to the limiting member (302). The main body (303) is provided with an external thread (3031). The operating member (301) is provided with a first groove (3011). The inner wall of the first groove (3011) is provided with an internal thread (3012). In the adjustment state, the operating member (301) is threadedly connected to the main body (303), and the inner wall of the first groove (3011) abuts against the limiting member (302).

3. The adjustable height wear-resistant sun umbrella according to claim 2, characterized in that, The main body (303) is provided with a first through hole (3032), the first through hole (3032) includes a connecting variable diameter section (30321) and a fixed section (30322), the variable diameter section (30321) has a large diameter end (30211) and a small diameter end (30212), the diameter of the variable diameter section (30321) decreases sequentially from the large diameter end (30211) to the small diameter end (30212), and the limiting member (302) includes a variable diameter part (3022). 1) and the boss portion (3022), at least part of the variable diameter portion (3021) extends out of the large diameter end (30211), the inner wall of the fixing hole section (30322) is provided with a second groove (30323), the boss portion (3022) passes through the small diameter end (30212) and is engaged in the second groove (30323); and the fixing hole section (30322) is sleeved on the outer periphery of the second rod body (202) and is fixedly connected to the second rod body (202).

4. The adjustable height wear-resistant sun umbrella according to claim 3, characterized in that, The limiting member (302) is provided with a second through hole (3023), and the limiting member (302) is elastic.

5. The adjustable height wear-resistant sun umbrella according to claim 4, characterized in that, The limiting member (302) has a notch that extends through the variable diameter portion (3021) and the boss portion (3022) along the extension direction of the first through hole (3032).

6. The adjustable height wear-resistant sun umbrella according to claim 4, characterized in that, The limiting member (302) has a locking part and a locking part that are spaced apart, and the locking part and the locking part are engaged to form the second through hole (3023).

7. The adjustable height wear-resistant sun umbrella according to any one of claims 1-6, characterized in that, It also includes an auxiliary wheel (304), which is sleeved on the outer periphery of the operating member (301) and fixedly connected to the operating member (301). The radius of the auxiliary wheel (304) is twice the radius of the operating member.

8. The adjustable height wear-resistant sun umbrella according to claim 7, characterized in that, The umbrella surface (102) material comprises, from the inside out, a flexible aerogel thermal insulation coating, an aerogel composite textile fabric layer, and an anti-ultraviolet coating.

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