Telescopic water passing structure of bent pipe and telescopic hardware fitting

Abstract

The invention provides a water passing structure with a telescopic bent pipe. The water passing structure comprises a bendable upper inner pipe, a thin-wall middle pipe and a lower inner pipe. The thin-wall middle pipe is made of a rigid material, a water passing connector part with a middle water path is formed at the water outlet end of the thin-wall middle pipe, the water passing connector part is provided with a protruding part which extends into the water inlet end of the upper inner pipe when the water passing connector part is matched with the upper inner pipe, and the protruding part is sleeved and fixed with the upper inner pipe; the inner wall of the thin-wall middle pipe is provided with a sealing sliding fit structure. The lower inner pipe is arranged in the thin-wall middle pipe in a matched mode through the sealing sliding fit structure. The invention provides an improved design structure of the thin-wall middle pipe, so that the telescopic operation of the bent pipe part is more convenient, and the overall sealing performance of the water passing inner pipe assembly before and after the telescopic operation is easier to ensure. The invention further discloses a telescopic hardware fitting comprising the telescopic elbow water passing structure.

Description

Technical Field

[0001] The present invention relates to hardware fittings, and in particular to the overall structure and component structures thereof for kitchen and bathroom hardware fittings. Background Art

[0002] Faucets and shower rods are important hardware fittings. Traditional structures are made of metals such as copper. After forming, bacteria and water scale are likely to grow inside during use, which hinders their continued use, and discarding them as a whole causes waste. In addition, some metal fittings are electroplated on the outer surface. During the operation, the inner surface may also be electroplated without being noticed. Water will be polluted after passing through such electroplated materials and does not meet the environmental protection requirements. Summary of the Invention

[0003] An object of the present invention is to solve one of the above problems and propose an improved bendable and telescopic water passing structure.

[0004] To achieve the above object, an embodiment of the present application provides a bendable and telescopic water passing structure, which includes an upper inner tube, a thin-walled intermediate tube, and a lower inner tube; the end of the thin-walled intermediate tube is coupled and communicated with the upper inner tube; the lower inner tube is telescopically and sealingly fitted inside the thin-walled intermediate tube and communicated with the thin-walled intermediate tube; thus, a water passing path is formed from the water inlet end of the lower inner tube to the thin-walled intermediate tube and then to the upper inner tube; wherein, the upper inner tube is bendable and made of a flexible material; wherein, the thin-walled intermediate tube is made of a rigid material, and a water passing joint with an intermediate water path is formed at the first end of the thin-walled intermediate tube. The water passing joint part has a protruding part that extends into the upper inner tube when cooperating with the upper inner tube, and the upper inner tube is sleeved and fixed on the protruding part; the inner wall of the thin-walled intermediate tube provides a sealing sliding fit structure; the lower inner tube is fitted inside the thin-walled intermediate tube through the sealing sliding fit structure; a boss with a radial dimension larger than that of the protruding part is provided at the rear side of the protruding part of the water passing joint part, and the boss is connected to an upper outer tube; a radially enlarged flange is provided at the rear side of the boss, and the front end face of the flange is used to engage with a limiting structure to limit the movement of the thin-walled intermediate tube in the length direction.

[0005] In some embodiments, the upper inner tube includes a bent inner tube part and a straight inner tube part that are communicated with each other. The free end of the straight inner tube part is used as the water inlet end of the upper inner tube, and the free end of the bent inner tube part is used as the water outlet end of the upper inner tube; a middle tube fastener is further included, and the middle tube fastener tightly connects the water inlet end of the upper inner tube to the protruding part from the outer periphery of the upper inner tube and then fixes it to the thin-walled middle part.

[0006] In some embodiments, the thin-walled intermediate pipe is made of stainless steel or copper pipe; the upper inner pipe is made of polyethylene or cross-linked polyethylene material; the lower inner pipe is made of the same material as the upper inner pipe or the same material as the thin-walled intermediate pipe.

[0007] In some embodiments, the sealing sliding fit structure is provided at the fitting end opposite to the water outlet end of the thin-walled intermediate pipe. The sealing sliding fit structure includes a sliding fit portion protruding radially inward, and a sealing unit provided at the sliding fit portion.

[0008] In some embodiments, the sealing unit is three sealing rings arranged along the long axis direction of the thin-walled intermediate pipe.

[0009] In some embodiments, the boss is provided with a connection structure, such as a thread or a bayonet provided at the outer edge of the boss.

[0010] In some embodiments, an outer sealing structure is provided on the outer wall of the thin-walled intermediate pipe for mating with the lower outer pipe to be installed.

[0011] Some other embodiments of the present application propose a telescopic hardware fitting, which is used as a shower rod for a bathroom faucet or an outlet pipe for a kitchen faucet; the telescopic hardware fitting includes the elbow telescopic water passing structure of any one of the above, and an upper outer pipe sleeved outside the upper inner pipe. The internal configuration of the upper outer pipe is consistent with the external configuration of the upper inner pipe, and includes a bent outer pipe portion and a straight outer pipe portion connected integrally with each other; the straight outer pipe portion is connected to the boss of the thin-walled intermediate pipe so as to be fixedly connected with the thin-walled intermediate pipe; a pipe sleeve serving as the limiting structure is frictionally fitted outside the straight outer pipe portion; the pipe sleeve is fixed to the outer sleeve portion of the installation outer sleeve in the circumferential direction. The installation outer sleeve further includes a connecting rod portion extending laterally from the outer sleeve portion, and the connecting rod portion is fixed to the installation seat; the size of the pipe sleeve in the length direction is smaller than that of the outer sleeve portion, so as to provide a position for connecting with the lower outer pipe at the lower part of the outer sleeve portion; a fitting structure is provided at the lower part of the outer sleeve portion of the installation outer sleeve, and is fitted with the upper end portion of the straight tubular lower outer pipe as a whole through the fitting structure.

[0012] In some embodiments, an outlet joint is fixedly connected to the water outlet end of the upper inner pipe, and the outlet joint is fixed to the water outlet end of the upper inner pipe through an outlet fastener. The outlet joint has an enlarged end, and the enlarged end is fitted to the end face of the water outlet end of the upper outer pipe. The lower end of the lower outer pipe is fixedly connected to an inlet joint. The inlet joint includes a base portion and an upper extension portion. The lower outer pipe and the lower inner pipe are respectively fixed at different height positions of the upper extension portion. The base portion is sleeved with an inlet nut. The base portion includes a bottom support, and the diameter of the bottom support is larger than the upper opening of the inlet nut. The upper extension portion includes a conical portion and a cylindrical portion. The conical portion is fixed to the lower outer pipe, and the cylindrical portion is fixed to the lower inner pipe through an inlet fastener.

[0013] In some embodiments, the pipe sleeve is made of polyoxymethylene material, and is in transition fit or clearance fit with the straight outer pipe portion.

[0014] The beneficial effects of the present invention include: the water passing inner pipe assembly is made of environment-friendly materials, and all water passing pipe fittings have no plating or coating. An improved design structure of the intermediate pipe is provided, which makes the telescopic operation of the bent pipe part more convenient and it is easier to ensure the overall sealing performance of the water passing inner pipe assembly before and after telescoping.

[0015] The above is only a brief and general description of the beneficial effects of the present invention. Other advantages and effects of the embodiments of the present invention will become obvious through the detailed description of the relevant embodiments to follow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an overall structural schematic diagram of a bendable telescopic water outlet structure according to an embodiment of the present invention.

[0017] Figure 2 is an exploded structural schematic diagram of a bendable telescopic water outlet structure according to an embodiment of the present invention.

[0018] Figure 3 is a structural cross-sectional schematic diagram of a bendable telescopic water outlet structure according to an embodiment of the present invention.

[0019] Figure 4 is Figure 3 a partial enlarged view of the first part of the cross-sectional view.

[0020] Figure 5 is Figure 3 a partial enlarged view showing the second part of the cross-sectional view after elongation.

[0021] Figure 6 is Figure 3 a partial enlarged view showing the second part of the cross-sectional view after shortening.

[0022] Figure 7 isFigure 3 Partial enlarged view of the third part of the middle cross-sectional view.

[0023] Figure 8 It is a schematic diagram of the overall structure of a telescopic hardware fitting including the elbow telescopic water outlet structure of the present application.

[0024] Figure 9 It is a schematic exploded view of a telescopic hardware fitting including the elbow telescopic water outlet structure of the present application.

[0025] Figure 10 It is a cross-sectional view of the telescopic hardware fitting including the elbow telescopic water outlet structure of the present application after elongation.

[0026] Figure 11 It is a cross-sectional view of the telescopic hardware fitting including the elbow telescopic water outlet structure of the present application after shortening.

[0027] Figure 12 It is Figure 10 Partial cross-sectional view of the position where the pipe sleeve is located, showing the positional relationship between the thin-walled middle pipe and the pipe sleeve after elongation.

[0028] Figure 13 It is Figure 11 Partial cross-sectional view of the position where the pipe sleeve is located, showing the positional relationship between the thin-walled middle pipe and the pipe sleeve after shortening.

[0029] Figure 14 It is a partial schematic diagram of the part where the water outlet joint of the hardware fitting including the elbow telescopic water outlet structure of the present application is located.

[0030] Figure 15 It is Figure 10 Partial enlarged view of the water passing joint part of the thin-walled middle pipe in

[0031] Figure 16 It is a partial schematic diagram of the part where the water inlet joint of the hardware fitting including the elbow telescopic water outlet structure of the present application is located. Detailed implementation manners

[0032] The following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will further describe the specific technical solutions of the present application in detail with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not used to limit the scope of the present application.

[0034] In the embodiments of the present application, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", and "right" are defined relative to the orientation in which the components in the drawings are schematically placed. It should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and they can change correspondingly according to the change in the orientation in which the components in the drawings are placed.

[0036] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium.

[0037] In the embodiments of the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including such element.

[0038] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0039] Refer to Figure 1 、 Figure 2 、 Figure 3 According to an embodiment of the present application, the bendable and telescopic water passing structure 100 of a bent pipe includes a bendable upper inner pipe 2 and a thin-walled intermediate pipe 6. The end portions of the thin-walled intermediate pipe 6 and the upper inner pipe 2 are coupled and communicated through an intermediate pipe fastener 32, such as a copper ring. The lower inner pipe 5 is telescopically and sealingly fitted inside the thin-walled intermediate pipe 6 and is communicated with the thin-walled intermediate pipe 6. Thus, a water passing path is formed from the water inlet end of the lower inner pipe to the thin-walled intermediate pipe and then to the upper inner pipe 2.

[0040] Among them, the bendable upper inner tube 2 includes a bent inner tube portion 21 and a straight inner tube portion 22 that are interconnected. The two parts can be integrated. The free end of the straight inner tube portion 22 serves as the water inlet end 23 of the upper inner tube, and the free end of the bent inner tube portion serves as the water outlet end 24 of the upper inner tube. The upper inner tube 2 can be made of polyethylene (PE) with better flexibility, especially materials with a minimum bending radius of 140 mm, such as cross-linked polyethylene (PEX) materials, such as PEX-A, PEX-B, PEX-C, etc., made of materials with a flexibility range. Because the internal configuration of the upper outer tube 1 is generally consistent with the external configuration of the upper inner tube 2, when using PE materials, it may be necessary to heat the upper inner tube to make it pass through the bent upper outer tube. When using PEX materials, it can pass through the upper outer tube with the same bending radian at room temperature.

[0041] Among them, the thin-walled intermediate tube 6 is a rigid tube and can be made of stainless steel, such as 304 stainless steel, 316 stainless steel, etc., copper tubes, etc. As Figure 4 shown, the water outlet end 61 of the thin-walled intermediate tube forms a water-passing joint portion 611 with an intermediate water passage. The water-passing joint portion 611 has a protrusion 6111 that extends into the water inlet end 23 of the upper inner tube when mating with the upper inner tube. After the upper inner tube is sleeved on the protrusion 6111, the water inlet end 23 of the upper inner tube is firmly connected to the protrusion 6111 from the outer periphery of the upper inner tube 2 by the intermediate tube fastener 32 and then fixed to the thin-walled intermediate tube. The inner wall of the thin-walled intermediate tube 6 can provide a sealing sliding fit structure 621. For example, the sealing sliding fit structure 621 can be provided at the other end opposite to the water outlet end 61 of the thin-walled intermediate tube, called the mating end 62. The sealing sliding fit structure 621 can include a sliding fit portion 6211 that protrudes radially inward, and a sealing unit 6212 can be provided on the sliding fit portion, such as three sealing rings arranged along the long axis direction of the thin-walled intermediate tube 6.

[0042] A boss 6112 with a radial dimension larger than that of the protrusion 6111 is provided at the rear side (the rear side here refers to the side away from the upper inner tube, such as the lower side in the figure) of the protrusion 6111 of the water-passing joint portion 611. The boss 6112 is provided for connecting the upper outer tube. For this purpose, the boss 6112 can be provided with a connection structure, and the connection structure is, for example, a thread or a bayonet provided on the outer edge of the boss 6112. A flange 6113 that expands radially is provided at the rear side of the boss 6112. The front end face of the flange 6113, that is, the upward end face in the figure, is used to engage with the limiting structure to limit the movement of the thin-walled intermediate tube 6, so that the thin-walled intermediate tube 6 can only move on the lower inner tube 5 and does not disengage after installation is completed.

[0043] The diameter of the middle pipe is based on the outer diameter of the upper outer pipe and the inner diameter of the lower outer pipe. For example, for an upper outer pipe with an outer diameter of 20 mm and a lower outer pipe with an inner diameter of 22 mm, the diameter of the thin-walled middle pipe 6 can be 18 mm, the outer diameter of the flange 6113 can be 21 mm, and the outer diameter of the sliding fit structure 621 can be 20 mm.

[0044] The lower inner pipe 5 is fitted into the thin-walled middle pipe through the sealing sliding fit structure 621. It can be made of the same material as the upper inner pipe 2, such as PE or PEX material, or can also be made of the same material as the thin-walled middle pipe, such as a stainless steel pipe, copper pipe, etc.

[0045] An outer sealing structure 622 can be provided on the outer wall of the thin-walled middle pipe 6 for fitting with the lower outer pipe to which it is installed.

[0046] The basic working principle of the elbow telescopic water passing structure 100 is as follows: As Figure 5 、 Figure 6 shown, the lower inner pipe 5 is fixed to the water outlet part of the faucet. By driving the upper inner pipe 2, the thin-walled middle pipe 6 can be driven to slide relative to the lower inner pipe 5, so that the elongation of the elbow telescopic water passing structure 100 can be achieved, and reverse operation can achieve shortening.

[0047] In some embodiments, as Figure 7 shown, a water outlet joint 4 is provided at the water outlet end 24 of the upper inner pipe. The water outlet joint 4 is fixed to the water outlet end 24 of the upper inner pipe through a water outlet fastener 31.

[0048] Figure 8 、 Figure 9 、 Figure 10 show the structural schematic diagram of the hardware fitting 200 equipped with the elbow telescopic water passing structure 100 in the above embodiments. This hardware fitting can be, for example, a shower rod that cooperates with a bathroom faucet, or an outlet pipe of a kitchen faucet.

[0049] As Figure 8 、 Figure 9 shown, in addition to the elbow telescopic water passing structure 100, the hardware fitting 200 also includes an upper outer pipe 1 sleeved outside the upper inner pipe 2. The internal configuration of the upper outer pipe 1 is generally consistent with the external configuration of the upper inner pipe 2. For example, it can include a bent outer pipe part 1A and a straight outer pipe part 1B that are connected as a whole. An upper outer pipe water outlet end is provided at the bent outer pipe part 1A. As Figure 14As shown, at the water outlet end 24 of the upper inner pipe, a water outlet joint 4 can be fixedly connected. The water outlet joint 4 can be made of a material with high strength, such as a metal material, a metal-like material, such as POM material, and the water outlet joint 4 is fixed to the water outlet end 24 of the upper inner pipe through a water outlet fastener 31. For example, the water outlet joint 4 can have an enlarged end, and this enlarged end fits on the end face of the water outlet end of the upper outer pipe. The water outlet end of the upper outer pipe can have an external thread to connect to a spray head component.

[0050] As Figure 15 As shown, the straight outer pipe part 1B is fixedly connected to the thin-walled intermediate pipe 6 by, for example, a corresponding thread or bayonet structure to the boss 6112 of the thin-walled intermediate pipe 6. A pipe sleeve 15 is frictionally fitted on the outside of the straight outer pipe part 1B. The pipe sleeve 15 serves as the limiting structure and can be made of POM material, and it has an interference fit or clearance fit with the straight outer pipe part 1B. The pipe sleeve 15 is fixed in the circumferential direction to the outer sleeve part 121 of the mounting outer sleeve 12. The mounting outer sleeve 12 further includes a connecting rod part 122 extending laterally from the outer sleeve part 121, and the connecting rod part 122 can be fixed to the mounting seat 13. The mounting seat 13 is fixed laterally, for example, fixed to a wall surface. Both the mounting outer sleeve 12 and the mounting seat 13 can be made of zinc alloy. As shown, in the length direction of the pipe sleeve 15, that is, in the up and down direction, the dimension is smaller than that of the outer sleeve part 121, so as to provide a position for connecting to the lower outer pipe 10 at the lower part 1211 of the outer sleeve part 121. For example, a mating structure, such as a thread, is provided at the lower part 1211 of the outer sleeve part 121 of the mounting outer sleeve 12, and through this mating structure, it can be fitted with the upper end 101 part of the lower outer pipe 10 as a whole.

[0051] As Figure 16 As shown, the lower outer pipe 10 is integrally in a straight pipe shape, and its lower end part 102 can be fixedly connected to a water inlet joint 8. The water inlet joint 8 can include a base part 81 and an upper extension part 82. The lower outer pipe 10 and the lower inner pipe 5 are respectively fixed at different height positions of the upper extension part. The base part 81 is sleeved with a water inlet nut 9. The water inlet joint 8 is made of a material with high strength, such as formed from metal materials such as copper and stainless steel, metal-like materials, such as polyoxymethylene (POM) materials, etc. Its base part 81 can include a bottom support, and the diameter of the bottom support is larger than the upper opening of the water inlet nut 9. The upper extension part 82 can include a conical part 821 and a cylindrical part 822. The conical part 821 is fixed to the lower outer pipe 10, and the cylindrical part 822 is fixed to the lower inner pipe 5 through a water inlet fastener 7.

[0052] The working principle of the hardware fitting including the bendable pipe telescopic water outlet structure in the embodiments of the present application is as follows: Insert the upper inner pipe 2 into the upper outer pipe 1. The water outlet joint 4 is fixed to the ends of the upper inner pipe and the upper outer pipe through a water outlet fastener 31, such as a copper ring, thus forming the upper part; Fix the water inlet end of the lower outer pipe, the water inlet end of the lower inner pipe, and the water inlet nut 9 to the water inlet joint 8 to form the lower part; A pipe sleeve 15 is fixedly arranged inside the installation outer sleeve 12; Fit the water inlet end of the thin-walled intermediate pipe into the space between the lower inner pipe 5 and the lower outer pipe 10, and then connect one end of its water passing joint to the water inlet ends of the upper inner pipe 2 and the upper outer pipe passing through the pipe sleeve 15 to be integrated so as to be slidable together inside the pipe sleeve 15. Then fix the installation outer sleeve 12 to the installation seat 13 and lock it through the locking member 14, and fix the water inlet nut 9 to the water outlet part of the faucet.

[0053] As Figure 12 , Figure 13 shown, from Figure 10 the position shown, by pulling up the upper outer pipe 1, the thin-walled intermediate pipe 6 can be driven to move upward relative to the lower inner pipe and the lower outer pipe, thereby elongating the length of the entire hardware fitting. When the water passing joint part 611 abuts against the end face of the pipe sleeve 15, it can no longer move upward. To Figure 11 the position shown, ensure that the thin-walled intermediate pipe does not separate from the lower inner pipe 5 and the lower outer pipe. The adjustable height of the telescoping can be determined according to the height of the thin-walled intermediate pipe 6. For the shower rod, it can be 400 mm, and for the faucet rod, it can be shorter.

[0054] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present application, not to limit it; Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bendable pipe telescopic water passing structure, characterized in that: It includes an upper inner tube (2), a thin-walled intermediate tube (6) and a lower inner tube (5); the end of the thin-walled intermediate tube (6) is coupled and communicated with the upper inner tube (2); the lower inner tube (5) is telescopically and sealingly fitted inside the thin-walled intermediate tube (6) and communicated with the thin-walled intermediate tube (6); thus, a water passing waterway is formed from the water inlet end of the lower inner tube to the thin-walled intermediate tube (6) and then to the upper inner tube (2). Among them, the upper inner tube (2) is bendable and is made of a flexible material. Among them, the thin-walled intermediate tube (6) is made of a rigid material. A water passing joint part (611) with an intermediate waterway is formed at the first end of the thin-walled intermediate tube (6). The water passing joint part (611) has a protruding part (6111) that extends into the upper inner tube (2) when mating with the upper inner tube (2), and the upper inner tube (2) is sleeved and fixed on the protruding part (6111); the inner wall of the thin-walled intermediate tube (6) provides a sealing sliding fit structure (621); the lower inner tube (5) is fitted inside the thin-walled intermediate tube (6) through the sealing sliding fit structure (621). A boss (6112) with a radial dimension larger than that of the protruding part (6111) is arranged at the rear side of the protruding part (6111) of the water passing joint part (611), and the boss (6112) is connected to the upper outer tube; a radially enlarged flange (6113) is arranged at the rear side of the boss (6112), and the front end face of the flange (6113) is used to engage with a limiting structure to limit the movement of the thin-walled intermediate tube (6) in the length direction.

2. The bendable pipe telescopic water passing structure according to claim 1, characterized in that: The upper inner tube (2) includes a bent inner tube part (21) and a straight inner tube part (22) that are communicated with each other. The free end of the straight inner tube part (22) is the water inlet end (23) of the upper inner tube, and the free end of the bent inner tube part is the water outlet end (24) of the upper inner tube; it also includes an intermediate tube fastener (32), and the intermediate tube fastener (32) tightly connects the water inlet end (23) of the upper inner tube to the protruding part (6111) from the outer periphery of the upper inner tube (2) and then fixes it to the thin-walled intermediate tube (6).

3. The bendable pipe telescopic water passing structure according to claim 1, wherein: The thin-walled intermediate tube (6) is made of stainless steel or copper tube; the upper inner tube (2) is made of polyethylene or cross-linked polyethylene material; the lower inner tube (5) is made of the same material as the upper inner tube (2) or the same material as the thin-walled intermediate tube (6).

4. The bendable pipe telescopic water passing structure according to claim 1, wherein: The sealing sliding fit structure (621) is provided at the mating end (62) opposite to the water outlet end (61) of the thin-walled intermediate tube. The sealing sliding fit structure (621) includes a sliding fit part (6211) that protrudes radially inward, and a sealing unit (6212) is provided on the sliding fit part.

5. The bendable pipe telescopic water passing structure according to claim 4, wherein: The sealing unit (6212) is three sealing rings arranged along the long axis direction of the thin-walled intermediate tube (6).

6. The bendable pipe telescopic water passing structure according to claim 1, wherein: The boss (6112) is provided with a connection structure, and the connection structure is, for example, a thread or a bayonet arranged on the outer edge of the boss (6112).

7. The bendable pipe telescopic water passing structure according to claim 1, wherein: An outer sealing structure (622) is provided on the outer wall of the thin-walled intermediate pipe (6) for mating with the lower outer pipe to which it is installed.

8. A telescopic hardware fitting, which is a shower rod for mating with a bathroom faucet or a water outlet pipe for a kitchen faucet; It is characterized in that: The telescopic hardware fitting includes the elbow telescopic water passing structure of any one of claims 1 to 7, and an upper outer pipe (1) sleeved outside the upper inner pipe (2). The internal configuration of the upper outer pipe (1) is consistent with the external configuration of the upper inner pipe (2), and includes a bent outer pipe portion (1A) and a straight outer pipe portion (1B) connected integrally with each other; The straight outer pipe portion (1B) is connected to the boss (6112) of the thin-walled intermediate pipe (6) so as to be fixedly connected to the thin-walled intermediate pipe (6); a pipe sleeve (15) serving as the limiting structure is in frictional fit on the outer side of the straight outer pipe portion (1B); the pipe sleeve (15) is fixed in the circumferential direction to the outer sleeve portion (121) of the mounting outer sleeve (12). The mounting outer sleeve (12) further includes a connecting rod portion (122) extending laterally from the outer sleeve portion (121), and the connecting rod portion (122) is fixed to the mounting base (13); the dimension of the pipe sleeve (15) in the length direction is smaller than that of the outer sleeve portion (121), so as to provide a position for connecting with the lower outer pipe (10) at the lower part (1211) of the outer sleeve portion (121); a mating structure is provided at the lower part (1211) of the outer sleeve portion (121) of the mounting outer sleeve (12), and is mated with the upper end (101) portion of the straight pipe-shaped lower outer pipe (10) to form an integral body through this mating structure.

9. The retractable metal fitting according to claim 8, characterized in that: An outlet joint (4) is fixedly connected to the water outlet end (24) of the upper inner pipe, and the outlet joint (4) is fixed to the water outlet end of the upper inner pipe through an outlet fastener (31). The outlet joint (4) has an enlarged end, and this enlarged end is fitted to the end face of the water outlet end of the upper outer pipe; The lower end portion (102) of the lower outer pipe (10) is fixedly connected to an inlet joint (8). The inlet joint (8) includes a base portion (81) and an upper extension portion (82). The lower outer pipe (10) and the lower inner pipe (5) are respectively fixed to different height positions of the upper extension portion (82). The base portion (81) is sleeved with an inlet nut (9); the base portion (81) includes a bottom support, the diameter of the bottom support is larger than the upper opening of the inlet nut (9), and the upper extension portion (82) includes a conical portion (821) and a cylindrical portion (822); the conical portion (821) is fixed to the lower outer pipe (10), and the cylindrical portion (822) is fixed to the lower inner pipe (5) through an inlet fastener (7).

10. The telescopic hardware fitting according to claim 8, wherein: The pipe sleeve (15) is made of polyoxymethylene material, and is in transition fit or clearance fit with the straight outer pipe portion (1B).

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