Armrest

Abstract

The utility model relates to a handrail which comprises a rod body part, the rod body part is provided with a first structural layer, a second structural layer and a metal reinforcing piece, the metal reinforcing piece serves as an injection molding insert to be arranged in the first structural layer in an injection molding mode, and the second structural layer wraps the outer surface of the first structural layer through secondary injection molding. According to the handrail provided by the utility model, the bending resistance and the structural strength of the rod body part are improved through the metal reinforcer, and the metal reinforcer is completely wrapped in the first structural layer, so that the defect that an existing exposed metal rod is easy to rust and corrode is avoided, and rigid support is formed through tight wrapping of an injection molding material and metal; the second structural layer completely covers the outer surface of the first structural layer through a secondary injection molding process, so that the two layers of structures form an integrated structure in a molten state, and in the machining process, the injection molding efficiency is effectively improved through step-by-step molding, the machining and molding yield is improved, and high-strength bonding of molten bonding surfaces of two times of injection molding is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of handrails, in particular to a handrail. BACKGROUND

[0002] With the gradual aging of the population, handrails as an auxiliary equipment become indispensable safety protection facilities in the bedroom, bathroom and other scenes, and its core role is to provide stable grip support for users, especially in the wet and slippery environment, which needs to consider the basic requirements of slip resistance, structural strength and durability.

[0003] The common bathroom handrails on the market at present adopt metal pipes as the main support structure, such as stainless steel pipes or aluminum alloy pipes, and a slip-resistant layer made of rubber, silicone or thermoplastic elastomer is sleeved on the outside. This kind of structure wraps the slip-resistant rubber sleeve on the surface in an interference fit after bending the metal pipe into shape, and is widely used due to its simple production process and low cost.

[0004] However, the existing handrails also have the problem of insufficient structural stability. The metal pipe is easily corroded by water vapor erosion due to long-term exposure to the high humidity environment in the bathroom, especially at the pipe body interface or surface damage, the corrosion problem is more prominent, resulting in a decrease in overall strength. At the same time, the slip-resistant rubber sleeve and the metal pipe are only fixed by physical sleeving, and under the action of thermal expansion and contraction caused by temperature change or frequent gripping, the rubber sleeve is prone to displacement, loosening or even partial peeling, exposing the internal metal structure, which not only affects the safety of use, but also accelerates the corrosion process of the metal parts. SUMMARY

[0005] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a handrail, which aims to at least solve one of the above-mentioned problems of the prior art and provide a handrail with an integrated structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A handrail, comprising: a rod body portion having a first structure layer, a second structure layer and a metal reinforcing member, the metal reinforcing member being injection molded as an injection molded insert in the first structure layer, and the second structure layer wrapping the outer surface of the first structure layer by secondary injection molding.

[0008] The handrail provided by this utility model has a metal reinforcement embedded in the first structural layer, and a second structural layer wrapped around the first structural layer through secondary injection molding. On the one hand, the metal reinforcement improves the bending resistance and structural strength of the rod body. The metal reinforcement is completely wrapped inside the first structural layer, which avoids the defects of existing exposed metal rods that are prone to rust and corrosion. On the other hand, the tight wrapping of the injection molding material and the metal forms a rigid support. The second structural layer completely covers the outer surface of the first structural layer through the secondary injection molding process, so that the two layers are formed into a single structure in the molten state. This greatly avoids the problem of stress concentration at the splicing point of traditional assembled handrails. On the other hand, in the processing, the first structural layer that first encapsulates the metal reinforcement serves as the base, and then the outer layer is precisely wrapped through secondary injection molding. The step-by-step molding effectively improves the injection molding efficiency and reduces the risk of internal stress or surface shrinkage caused by uneven cooling and shrinkage during injection molding of a thick rod body. This improves the processing yield. The high-strength bonding of the molten joint surface of the two injections has a higher bonding strength than the weld line defects that may occur in one molding, further ensuring the long-term durability of the handrail.

[0009] In the above technical solution, the two ends of the rod body are bent to the same side to form a fixing part. The fixing part is hollow. The bottom wall of the fixing part is provided with a connecting structure. The connecting structure is configured to connect with the wall to be installed so as to fix the handrail to the wall to be installed.

[0010] In this solution, a hollow fixing part is formed by bending both ends of the pole to the same side, and a connecting structure is integrally formed on its bottom wall, thus achieving a hidden design for the handrail fixing structure. The handrail has a pole-like appearance with no protruding structures or parts on the outer surface, resulting in a simpler product appearance. Compared with the existing external threaded structure for fastening, the hidden connecting structure is directly formed by the injection molding process of the pole, improving the shear and torsional resistance of the installation nodes, making the handrail more robust, safer, and more reliable.

[0011] In the above technical solution, the fixing part has an opening at the end away from the bottom wall, and the handrail also includes a decorative cover, which is detachably disposed on the rod body and at least covers the opening.

[0012] In this solution, the opening of the fixing part is covered by a detachable decorative cover. On the one hand, the fitting design of the decorative cover and the rod body hides the opening, making the outer surface of the handrail smoother. On the other hand, in high-humidity environments such as bathrooms, it can effectively reduce the risk of moisture intrusion into the fixing part and avoid the risk of corrosion of the connection structure due to long-term exposure. The decorative cover removal function takes into account both the convenience of installation and maintenance and the simple appearance during daily use.

[0013] In the above technical solution, the portion of the rod body located between the two fixed portions is defined as a grip portion. The circumferential edge of the inner wall of the open opening and the edge of the inner wall of the grip portion transition and connect to form a mounting groove. The decorative cover is adapted to the mounting groove and covers the mounting groove.

[0014] In this design, a continuous closed mounting groove is formed by the transition between the grip and the circumferential edge of the open inner wall. The decorative cover is adapted to the mounting groove and can completely cover it. After the decorative cover is inserted, its outer contour smoothly transitions with the rod body, so that the outer surface of the handrail presents a complete curved surface without splicing lines.

[0015] In the above technical solution, the inner wall of the mounting groove is provided with a slot, and the decorative cover is provided with a buckle, which extends into the mounting groove and engages with the slot.

[0016] In this solution, the concealed snap-fit ​​between the buckle and the slot creates a secure connection between the decorative cover and the mounting groove without exposed fasteners, maintaining the overall streamlined aesthetic and avoiding the problem of dirt accumulating in the seams of existing products.

[0017] In the above technical solution, the gripping part is provided with a through hole, the through hole is opposite to the decorative cover, and the through hole is configured to allow a disassembly tool to pass through so that the disassembly tool can act on the decorative cover.

[0018] In this solution, the through hole and the decorative cover are positioned opposite each other. The disassembly tool applies force to the decorative cover through the through hole to pry it up, achieving non-destructive disassembly and assembly.

[0019] In the above technical solution, the outer wall of the first structural layer facing the decorative cover protrudes outward to form a reinforcing ring, the reinforcing ring is embedded in the second structural layer, and the through hole is located in the reinforcing ring.

[0020] In this design, a reinforcing ring is constructed around the location of the through hole in the first structural layer. The reinforcing ring strengthens the structure of the first structural layer around the through hole, preventing the hole edge from deforming or breaking due to stress when the user passes through the through hole with a disassembly tool. At the same time, the reinforcing ring is embedded in the second structural layer as a protruding structure, increasing the interlocking area of ​​the injection interface between the first and second structural layers and improving the interlayer bonding strength.

[0021] In the above technical solution, the first structural layer is constructed with a through stepped hole, the inner wall of the stepped hole is provided with reinforcing protrusions, and the second structural layer is attached to the surface of the stepped hole and defines the through hole.

[0022] In this design, the stepped hole serves as a structural reinforcement. When the user passes the disassembly tool through the through hole, it avoids the risk of deformation and breakage of the hole edge due to stress. Furthermore, the side with the larger diameter of the stepped hole faces the decorative cover, providing room for the disassembly tool to move. This allows the disassembly tool to deflect at multiple angles within the armrest to accommodate different prying directions, facilitating the user's disassembly operation.

[0023] In the above technical solution, the handrail also includes the disassembly tool as an optional accessory. The disassembly tool is an L-shaped rod, the cross-section of which is adapted to the through hole, and the length of the shorter side of the L-shaped rod is not greater than the length of the fixing part.

[0024] In this solution, the disassembly tool is sold as an optional accessory, making it convenient for users to install and maintain the handrail. The disassembly tool is designed as an L-shaped rod, which is simple in structure and easy to manufacture. The length of the shorter side of the L-shaped rod is no greater than the length of the fixing part, so that the shorter side can easily reach into the space between the wall and the handrail, and then reach into the through hole to disassemble. The longer side can serve as a handle for users to grip and exert force.

[0025] In the above technical solution, the decorative cover includes a face cover and a plug ring that protrudes from the inner wall surface of the face cover. The plug ring is adapted to the fixing part and plugged into the fixing part.

[0026] The insertion ring is provided with a first snap-fit ​​structure, and the inner wall surface of the fixing part is provided with a second snap-fit ​​structure. The first snap-fit ​​structure and the second snap-fit ​​structure are snap-fitted together.

[0027] In this design, the nested snap-fit ​​design of the plug ring and the fixing part creates a concealed connection between the decorative cover and the column body, resulting in a more secure connection.

[0028] In the above technical solution, along the radial direction of the rod body, the thickness of the second structural layer is less than that of the first structural layer; and / or

[0029] The first structural layer is provided with a plurality of reinforcing ribs at the bending position and / or the position of the fixing part, and the reinforcing ribs are embedded in the second structural layer. Attached Figure Description

[0030] Figure 1 This is a perspective view of a handrail according to an embodiment of the present utility model;

[0031] Figure 2 This is a cross-sectional view of a handrail according to an embodiment of the present invention;

[0032] Figure 3 This is an exploded view of a handrail according to an embodiment of the present invention;

[0033] Figure 4 This is a cross-sectional view of the handrail in an exploded state according to an embodiment of the present invention;

[0034] Figure 5 This is a perspective view of the first structural layer after a single injection molding process, according to an embodiment of the present invention.

[0035] Figure 6 This is a metal reinforcement component proposed in one embodiment of the present utility model.

[0036] The correspondence between the reference numerals and the component names is as follows:

[0037] Handrail 100, rod body 110, first structural layer 110A, second structural layer 110B, metal reinforcement 110C, fixing part 111, connecting structure 1111, opening 1112, second snap-fit ​​structure 1113, grip part 112, mounting groove 113, slot 1131, through hole 114, reinforcing ring 115, stepped hole 116, reinforcing protrusion 1161, reinforcing rib 117A, reinforcing rib 117B, decorative cover 120, face cover 121, buckle 1211, insertion ring 122, first snap-fit ​​structure 1221. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] The following is a reference to the appendix. Figure 1 To be continued Figure 6 The handrail 100 described in some embodiments of this utility model is described below.

[0041] like Figure 1 and Figure 2 As shown, this utility model provides a handrail 100, including a rod body 110. The rod body 110 has a first structural layer 110A, a second structural layer 110B, and a metal reinforcing member 110C. The metal reinforcing member 110C is injection molded into the first structural layer 110A as an injection molding insert. The second structural layer 110B wraps the outer surface of the first structural layer 110A through secondary injection molding.

[0042] It should be noted that this utility model does not limit the specific materials of the metal reinforcement 110C, the first structural layer 110A, and the second structural layer 110B. Those skilled in the art can choose according to specific needs. In one specific embodiment, the metal reinforcement 110C is made of iron or steel, which can provide better bending resistance. The first structural layer 110A and the second structural layer 110B are made of the same material, for example, the first structural layer 110A and the second structural layer 110B are both made of ABS. Of course, the first structural layer 110A and the second structural layer 110B can also be designed to be made of different materials, for example, the first structural layer 110A is a rigid structural layer and the second structural layer 110B is a soft structural layer, which can give the armrest 100 a better tactile feel.

[0043] It should also be noted that this utility model does not limit the specific shape and size of the metal reinforcement 110C, the first structural layer 110A, and the second structural layer 110B. Those skilled in the art can make selections according to specific needs.

[0044] For example, the handrail 100 can be designed as a straight rod, or it can be designed as an "L", "U", or "Z" shape depending on the installation environment.

[0045] Accordingly, the cross-section of the metal reinforcement 110C can be designed to be rectangular, circular, etc. Depending on the actual needs, the first structural layer 110A can be designed to have a complete metal reinforcement 110C built in, so that the metal reinforcement 110C has better integrity, more uniform stress distribution, and is less prone to deformation. Alternatively, the first structural layer 110A can be designed to have multiple metal reinforcements 110C built in, with multiple metal reinforcements 110C distributed in different positions, allowing for targeted structural reinforcement design for certain positions. For example, for L-shaped, U-shaped, and Z-shaped handrails 100, metal reinforcements 110C can be designed at the corresponding positions for structural reinforcement.

[0046] The handrail 100 provided by this utility model has a metal reinforcing member 110C embedded in a first structural layer 110A. A second structural layer 110B is formed by secondary injection molding, encapsulating the first structural layer 110A. On one hand, the metal reinforcing member 110C enhances the bending resistance and structural strength of the rod body 110. The metal reinforcing member 110C is completely encapsulated within the first structural layer 110A, avoiding the defects of exposed metal rods being prone to rust and corrosion. On the other hand, the tight encapsulation of the injection molding material with the metal forms a rigid support. The second structural layer 110B completely covers the outer surface of the first structural layer 110A through a secondary injection molding process, allowing the two layers to be molten together. In this state, it forms an integrated structure, which greatly avoids the problem of stress concentration at the splicing point of the traditional assembled handrail 100. On the other hand, in the processing, the first structural layer 110A of the metal reinforcement 110C is first injection molded as the base, and then the outer layer is precisely wrapped by secondary injection molding. The step-by-step molding effectively improves the injection molding efficiency and reduces the risk of internal stress or surface shrinkage caused by uneven cooling and shrinkage during injection molding due to the excessive thickness of the rod, thereby improving the processing and molding yield. The high-strength bonding of the fusion interface of the two injections is higher than that of the weld line defects that may occur during one molding, further ensuring the long-term durability of the handrail 100.

[0047] One embodiment, such as Figure 2 and Figure 3 As shown, both ends of the rod portion 110 are bent to the same side to form a fixing portion 111. The fixing portion 111 is hollow, and the bottom wall of the fixing portion 111 is provided with a connecting structure 1111. The connecting structure 1111 is configured to connect with the wall to be installed to fix the handrail 100 to the wall to be installed. By bending both ends of the rod portion 110 to the same side to form a hollow fixing portion 111, and integrally forming the connecting structure 1111 on its bottom wall, a hidden design of the fixing structure of the handrail 100 is achieved. The handrail 100 has a rod-like appearance, with no protruding structures or parts on the outer surface, resulting in a simpler product appearance. Compared with the existing fastening through an external threaded structure, the hidden connecting structure 1111 is directly formed by the injection molding process of the rod portion 110, improving the shear and torsional resistance of the installation node, making the handrail 100 more robust and safer.

[0048] The fixing part 111 has an opening 1112 at the end away from the bottom wall, and the handrail 100 also includes a decorative cover 120, which is detachably provided on the rod part 110 and at least covers the opening 1112.

[0049] It should be noted that this utility model does not limit the specific material of the decorative cover 120, and those skilled in the art can choose according to specific needs. For example, the decorative cover 120 can be made of metal, plastic, silicone, etc.

[0050] Similarly, this utility model does not limit the specific shape of the decorative cover 120, and those skilled in the art can design it according to specific needs. For example, in a specific embodiment, the decorative cover 120 is designed to fit the opening 1112, and one handrail 100 is provided with two corresponding decorative covers 120, with the two decorative covers 120 covering the opening 1112 of the rod body 110 one-to-one. Furthermore, the decorative cover 120 can be designed to be connected to the fixing part 111 by means of threads, bolts, plugs, snaps, etc.

[0051] By covering the opening 1112 of the fixing part 111 with the detachable decorative cover 120, on the one hand, the fitting design of the decorative cover 120 and the rod part 110 hides the opening 1112, making the outer surface of the handrail 100 smoother. On the other hand, in high-humidity environments such as bathrooms, it can effectively reduce the risk of moisture intrusion into the fixing part 111 and avoid the risk of corrosion of the connecting structure 1111 due to long-term exposure. The detachable function of the decorative cover 120 takes into account both the convenience of installation and maintenance and the simple appearance during daily use.

[0052] One embodiment, such as Figure 3 and Figure 4 As shown, the portion of the rod body 110 located between the two fixing portions 111 is defined as a grip portion 112. The circumferential edge of the inner wall of the open opening 1112 and the edge of the inner wall of the grip portion 112 transition and connect to form a mounting groove 113. The decorative cover 120 is adapted to the mounting groove 113 and covers the mounting groove 113. The grip portion 112 and the circumferential edge of the inner wall of the open opening 1112 form a continuous closed mounting groove 113. The decorative cover 120 is adapted to the mounting groove 113 and can completely cover the mounting groove 113. After the decorative cover 120 is inserted, its outer contour smoothly transitions with the rod body 110, so that the outer surface of the handrail 100 presents a complete curved surface without splicing lines.

[0053] To give a more detailed example, the metal reinforcement 110C is located inside the grip portion 112 and extends to the two fixing portions 111, so that the metal reinforcement 110C can structurally strengthen the length of the rod portion 110, making the handrail 100 more resistant to bending.

[0054] More specifically, such as Figure 5 and Figure 6 As shown, the inner wall of the mounting groove 113 is provided with a slot 1131, and the decorative cover 120 is provided with a buckle 1211. The buckle 1211 extends into the mounting groove 113 and engages with the slot 1131. The concealed engagement between the buckle 1211 and the slot 1131 forms a stable connection between the decorative cover 120 and the mounting groove 113 without exposed fasteners, maintaining the overall streamlined aesthetics and avoiding the situation where dirt and grime accumulate in the seams of existing products.

[0055] More specifically, such as Figure 2and Figure 3 As shown, the mounting groove 113 is provided with a plurality of slots 1131 spaced apart circumferentially, and the gripping part 112 is provided with a through hole 114. The through hole 114 is positioned opposite to two adjacent slots 1131. The through hole 114 is configured to allow a disassembly tool to pass through so that the disassembly tool can act on the decorative cover 120. With the through hole 114 and the decorative cover 120 positioned opposite each other, the disassembly tool applies force against the decorative cover 120 through the through hole 114 to pry up the decorative cover 120, achieving non-destructive disassembly and assembly.

[0056] Furthermore, such as Figure 5 As shown, a reinforcing ring 115 protrudes outward from the outer wall of the first structural layer 110A facing the decorative cover 120. The reinforcing ring 115 is embedded in the second structural layer 110B, and the through hole 114 is located within the reinforcing ring 115. The reinforcing ring 115 around the through hole 114 in the first structural layer 110A provides structural reinforcement around the through hole 114. When a user uses a disassembly tool to pass through the through hole 114, it can prevent the edge of the through hole 114 from being deformed or broken due to stress. At the same time, the reinforcing ring 115, as a protruding structure embedded in the second structural layer 110B, increases the interlocking area of ​​the injection molding interface between the first structural layer 110A and the second structural layer 110B, thereby improving the interlayer bonding strength.

[0057] Furthermore, such as Figure 5 As shown, the first structural layer 110A has a through stepped hole 116, and the inner wall of the stepped hole 116 has a reinforcing protrusion 1161. The second structural layer 110B is attached to the surface of the stepped hole 116 and defines the through hole 114. The stepped hole 116 serves to strengthen the structure. When the user uses a disassembly tool to pass through the through hole 114, it can prevent the edge of the through hole 114 from being deformed or broken due to stress. Furthermore, the side of the stepped hole 116 with a larger diameter faces the decorative cover 120, which provides room for the disassembly tool to move, allowing the disassembly tool to deflect at multiple angles within the armrest 100 to adapt to different prying directions, thus facilitating the user's disassembly operation.

[0058] In one embodiment, the handrail 100 also includes a disassembly tool as an optional accessory. The disassembly tool is an L-shaped rod, the cross-section of which is adapted to the through hole 114, and the length of the shorter side of the L-shaped rod is not greater than the length of the fixing part 111. The disassembly tool is sold as an optional accessory, making it convenient for users to install and maintain the handrail 100. Furthermore, the L-shaped design of the disassembly tool is simple in structure and easy to manufacture. The shorter side of the L-shaped rod is not greater than the length of the fixing part 114, allowing the shorter side to easily extend into the space between the wall and the handrail 100, thereby reaching into the through hole 114 for disassembly. The longer side can serve as a handle for easy gripping by the user.

[0059] It should be noted that this utility model does not limit the specific shape of the disassembly tool, and the disassembly tool can be designed as needed, for example, the disassembly tool can be designed as a long rod. Furthermore, the disassembly tool is not a necessary component for realizing this utility model, nor is it a necessary component for the sale of this product; in other embodiments, the disassembly tool may be omitted.

[0060] One embodiment, such as Figure 1 and Figure 2 As shown, the decorative cover 120 includes a face cover 121 and an insertion ring 122 extending protruding from the inner wall surface of the face cover 121. The insertion ring 122 is adapted to and inserted into the fixing part 111. The insertion ring 122 is provided with a first snap-fit ​​structure 1221, and the inner wall surface of the fixing part 111 is provided with a second snap-fit ​​structure 1113. The first snap-fit ​​structure 1221 and the second snap-fit ​​structure 1113 are snapped together. The nested snap-fit ​​design of the insertion ring 122 and the fixing part 111 creates a deeply interlocking, concealed connection between the decorative cover 120 and the column part, making the connection more secure.

[0061] One embodiment, such as Figure 1 and Figure 2 As shown, along the radial direction of the rod portion 110, the thickness of the second structural layer 110B is less than that of the first structural layer 110A.

[0062] One embodiment, such as Figure 1 and Figure 2 As shown, the grip portion 112 has a convex arc shape on the side facing the extension direction of the fixing portion 111, and a flat shape on the side away from the extension direction of the fixing portion 111. That is, the cross-section of the grip portion 112 is roughly semi-circular. After being installed on the wall, the flat side faces outward and the convex arc side faces the wall. When the user grips the handrail 100, the thumb contacts the flat side and the other four fingers contact the convex arc side. Compared with the existing circular or rectangular cross-section handrails 100, this cross-section design fits the tiger's mouth of the hand better and is more convenient to grip.

[0063] One embodiment, such as Figure 1 and Figure 2 As shown, the first structural layer 110A has multiple reinforcing ribs A at the bending position, and the reinforcing ribs A are embedded in the second structural layer 110B.

[0064] One embodiment, such as Figure 1 and Figure 2 As shown, a plurality of reinforcing ribs B are provided at the position of the fixing part 111, and the reinforcing ribs B are embedded in the second structural layer 110B.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A handrail, characterized in that, include: The rod body has a first structural layer, a second structural layer, and a metal reinforcing member. The metal reinforcing member is injection molded into the first structural layer as an injection molding insert. The second structural layer wraps the outer surface of the first structural layer through secondary injection molding, so that the two structural layers are formed into a single structure in a molten state. The first structural layer and the second structural layer are both made of ABS material. Both ends of the rod are bent toward the same side to form a fixing part. The fixing part is hollow. The bottom wall of the fixing part is provided with a connecting structure. The connecting structure is configured to connect with the wall to be installed so as to fix the handrail to the wall to be installed.

2. The handrail according to claim 1, characterized in that, The fixing part has an opening at one end away from the bottom wall, and the handrail also includes a decorative cover that is detachably provided on the rod body and at least covers the opening.

3. The handrail according to claim 2, characterized in that, The portion of the rod body located between the two fixed portions is defined as a grip portion. The circumferential edge of the inner wall of the open opening and the edge of the inner wall of the grip portion transition and connect to form a mounting groove. The decorative cover is adapted to the mounting groove and covers the mounting groove.

4. The handrail according to claim 3, characterized in that... The inner wall of the mounting groove is provided with a slot, and the decorative cover is provided with a buckle. The buckle extends into the mounting groove and engages with the slot.

5. The handrail according to claim 4, characterized in that, The grip portion has a through hole opposite to the decorative cover, and the through hole is configured to allow a disassembly tool to pass through so that the disassembly tool can act on the decorative cover.

6. The handrail according to claim 5, characterized in that, The outer wall of the first structural layer facing the decorative cover protrudes outward to form a reinforcing ring, which is embedded in the second structural layer, and the through hole is located inside the reinforcing ring.

7. The handrail according to claim 5 or 6, characterized in that, The first structural layer has a through stepped hole, the inner wall of which has reinforcing protrusions; the second structural layer is attached to the surface of the stepped hole and defines the through hole; and / or The handrail also includes the disassembly tool as an optional accessory. The disassembly tool is an L-shaped rod, the cross-section of which is adapted to the through hole, and the length of the shorter side of the L-shaped rod is not greater than the length of the fixing part.

8. The handrail according to any one of claims 2 to 6, characterized in that, The decorative cover includes a face cover and a plug ring extending from the inner wall surface of the face cover, the plug ring being adapted to and plugged into the fixing part; The insertion ring is provided with a first snap-fit ​​structure, and the inner wall surface of the fixing part is provided with a second snap-fit ​​structure. The first snap-fit ​​structure and the second snap-fit ​​structure are snap-fitted together.

9. The handrail according to any one of claims 1 to 6, characterized in that, Along the radial direction of the rod body, the thickness of the second structural layer is less than that of the first structural layer; and / or The first structural layer is provided with a plurality of reinforcing ribs at the bending position and / or the position of the fixing part, and the reinforcing ribs are embedded in the second structural layer.

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