Extension pipe assembly and steam cleaning machine

Abstract

The utility model relates to the technical field of cleaning electric appliances, and discloses an extension pipe assembly and a steam cleaning machine, the extension pipe assembly comprises an extension pipe, a shield and a steam pipe, the shield is connected to the outer wall of the extension pipe, a containing cavity is formed between the shield and the extension pipe, the steam pipe is arranged in the containing cavity, and the steam pipe is arranged in the containing cavity. An isolation pad is arranged on the outer wall of the steam pipe and is made of a heat insulation material. The steam pipe is arranged in the containing cavity between the protective cover and the extension pipe, heat conduction is reduced through the isolation pad on the outer wall of the steam pipe, so that the temperature of the extension pipe and the protective cover is reduced, the steam pipe is isolated through the protective cover, user contact is avoided, when a user holds the protective cover and the extension pipe, the hand scalding problem is solved, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning electrical appliances, in particular to an extension pipe assembly and a steam cleaning machine. Background Art

[0002] In the related art, a steam cleaning machine is a cleaning appliance that uses high-temperature steam for cleaning, and is mostly used to clean floor oil stains, kitchen walls, stoves, etc. Steam cleaning machines are usually equipped with a detachable extension tube, the inner hole of which serves as a dust suction channel, and high-temperature steam flows through the steam tube to the cleaning brush. The steam tube is arranged close to the extension tube, which will cause the temperature of the extension tube to rise. In certain usage scenarios, when the user holds the extension tube, the temperature of the extension tube is too high, which will make the user feel hot, affecting the user experience. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an extension tube assembly, which can effectively improve the problem of the extension tube being hot to the touch.

[0004] The utility model also provides a steam cleaning machine with the extension pipe assembly.

[0005] According to the first aspect of the utility model, the extension tube assembly includes an extension tube, a shield and a steam pipe, the shield is connected to the outer wall of the extension tube, a receiving cavity is formed between the shield and the extension tube, the steam pipe is arranged in the receiving cavity, and the outer wall of the steam pipe is provided with an isolation pad, and the isolation pad is made of a heat-insulating material.

[0006] The extension tube assembly according to the first embodiment of the utility model has at least the following beneficial effects:

[0007] The steam pipe is arranged in the accommodating cavity between the protective cover and the extension tube. The isolation pad on the outer wall of the steam pipe is used to reduce the conduction of heat, thereby reducing the temperature of the extension tube and the protective cover. The protective cover isolates the steam pipe to prevent user contact. When the user holds the protective cover and the extension tube, the problem of being scalded is improved, thereby enhancing the user experience.

[0008] According to some embodiments of the first aspect of the utility model, the isolation pad is at least one layer of thermal insulation cotton, and the thermal insulation cotton wraps the steam pipe.

[0009] According to some embodiments of the first aspect of the utility model, a plurality of first thermal insulation ribs are provided on the side of the shield facing away from the extension tube, and the plurality of first thermal insulation ribs are distributed at intervals.

[0010] According to some embodiments of the first aspect of the utility model, a plurality of second thermal insulation ribs are provided on the side of the shield facing the extension tube, the plurality of second thermal insulation ribs are distributed at intervals, and the second thermal insulation ribs abut the steam pipe or the isolation pad.

[0011] According to some embodiments of the first aspect of the utility model, a plurality of third thermal insulation ribs are provided on the outer wall of the extension tube, the plurality of third thermal insulation ribs are located in the accommodating cavity and are distributed at intervals, and the third thermal insulation ribs abut the steam pipe or the isolation pad.

[0012] According to some embodiments of the first aspect of the utility model, the outer wall of the extension tube is provided with a fourth rib, the fourth rib is arranged along the axial direction of the extension tube and passes through the plurality of the third insulation ribs.

[0013] According to some embodiments of the first aspect of the utility model, the shield has two symmetrically arranged side panels, the two side panels abut against the outer wall of the extension tube, the inner walls of the side panels are provided with buckles, and the outer wall of the extension tube is provided with a slot that cooperates with the buckle.

[0014] According to some embodiments of the first aspect of the utility model, the outer wall of the extension tube is provided with a latch, and the inner wall of the side plate is provided with a pin hole matching the latch.

[0015] According to some embodiments of the first aspect of the utility model, the extension tube is connected to a first hanger and a second hanger, and the first hanger and the second hanger cooperate to clamp the shield and the extension tube.

[0016] The steam cleaning machine according to the second embodiment of the utility model comprises the extension tube assembly described in the first embodiment.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of a steam cleaning machine according to an embodiment of the second aspect of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the extension tube assembly, the handle and the hose in the embodiment of the second aspect of the utility model;

[0021] Figure 3It is a structural schematic diagram of an extension tube assembly of an embodiment of the first aspect of the utility model;

[0022] Figure 4 A cross-sectional view of an extension tube assembly according to an embodiment of the first aspect of the utility model;

[0023] Figure 5 for Figure 4 A local enlarged view of point A;

[0024] Figure 6 The following is a schematic diagram of the extension tube assembly of the first embodiment of the utility model. Figure 1 ;

[0025] Figure 7 The following is a schematic diagram of the extension tube assembly of the first embodiment of the utility model. Figure 2 ;

[0026] Figure 8 It is a schematic structural diagram of the protective cover in the embodiment of the first aspect of the utility model;

[0027] Fig. 9 It is a schematic diagram of the structure of the extension tube in the embodiment of the first aspect of the utility model.

[0028] The figures are as follows:

[0029] Extension tube assembly 100;

[0030] Extension tube 200, card slot 201, third heat insulation rib 210, fourth rib 220, latch 230, first sealing plate 240, second sealing plate 250, male connector 260, positioning slot 261, first pipe connector 262, female connector 270, button 271, rotating shaft 2711, positioning pin 2712, mounting seat 272, spring 273, second pipe connector 274;

[0031] The shield 300, the accommodating cavity 301, the first heat-insulating rib 310, the second heat-insulating rib 320, the side plate 330, the buckle 331, and the pin hole 332;

[0032] Steam pipe 400, isolation pad 410;

[0033] Hook 500, first hanger 510, second hanger 520, hook portion 530;

[0034] Machine body 600, casters 610;

[0035] Hose 700;

[0036] Handle 800;

[0037] Cleaning brush 900. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] With the development of technology and the improvement of the quality of life, steam cleaning machines that help clean are becoming more and more widely used. Steam cleaning machines are equipment that uses high-temperature steam to clean. They are mostly used to clean floor oil stains, kitchen walls, stoves and other places. Considering the large cleaning range, steam cleaning machines are usually equipped with detachable extension tubes. The extension tube can increase the use range of the cleaning brush. The high-temperature steam prepared by the steam cleaning machine flows to the cleaning brush through the steam pipe. The steam pipe and the extension tube are arranged close to each other. Since the extension tube is close to the steam pipe, the outer shell temperature of the extension tube is relatively high. When the user uses the steam cleaning machine to clean the floor, there is no need to touch the extension tube with the hand, and the impact is not great. When the user cleans the kitchen stove, the extension tube needs to be lifted up. At this time, the extension tube is usually held by hand. The outer shell temperature of the extension tube is too high, which will make the user feel hot and affect the use.

[0043] To this end, an embodiment of the first aspect of the utility model proposes an extension tube assembly, which is applied to a steam cleaning machine. The extension tube assembly is improved in structure, and an isolation pad is added to the outer wall of the steam tube, which can reduce heat conduction and lower the temperature of the extension tube.

[0044] like Figures 3 to 8As shown, an extension tube assembly 100 for a steam cleaning machine is proposed, wherein the extension tube assembly 100 comprises an extension tube 200, a shield 300 and a steam pipe 400, wherein the shield 300 is connected to the outer wall of the extension tube 200, a receiving cavity 301 is formed between the shield 300 and the extension tube 200, the steam pipe 400 is arranged in the receiving cavity 301, and an isolation pad 410 is provided on the outer wall of the steam pipe 400, and the isolation pad 410 is made of a heat-insulating material.

[0045] It is understandable that when the steam cleaning machine is in operation, the steam prepared by the steam cleaning machine is transported through the steam pipe 400. Since the temperature of the steam is relatively high, the steam pipe 400 is also at a high temperature. The steam pipe 400 is arranged in the accommodating chamber 301 between the shield 300 and the extension tube 200. The shield 300 is used to isolate the user from contacting the steam pipe 400. At the same time, the isolation pad 410 on the outer wall of the steam pipe 400 is used to reduce the conduction of heat. The accommodating chamber 301 and the shield 300 can also reduce the conduction of heat, thereby reducing the temperature of the extension tube 200 and the shield 300. When the user contacts the shield 300 and the extension tube 200, the problem of scalding is eliminated, thereby improving the user experience. The shield 300 also plays a protective role, preventing the shield 300 from being collided or squeezed, and preventing the steam pipe 400 from being damaged or blocked.

[0046] It is understandable that if Figures 6 to 8 As shown, considering the shape of the steam pipe 400, the shape of the accommodating cavity 301 is adapted to the shape of the steam pipe 400, the shield 300 can be set to be a long strip, the cross-sectional shape of the shield 300 is approximately V-shaped, and the shape of the accommodating cavity 301 is approximately triangular prism, which can not only meet the requirements of accommodating the steam pipe 400, but also reduce the contact area between the steam pipe 400 and the shield 300, thereby reducing the heat conducted. The extension tube 200 is a round tube, and the position where the shield 300 with a V-shaped cross section contacts the extension tube 200 is close to the tangent of the extension tube 200, so that the transition of the connection position is smooth, which is conducive to the user's grip and improves the convenience of use.

[0047] In some embodiments, the isolation pad 410 can be made of insulation cotton, which is wrapped around the outer wall of the steam pipe 400. The insulation cotton has the characteristics of high temperature resistance, non-flammability, and low thermal conductivity. The steam pipe 400 is wrapped with insulation cotton to reduce heat dissipation, which can effectively improve the temperature rise problem of the extension tube 200 and the protective cover 300 and avoid the problem of scalding.

[0048] It is understandable that the isolation pad 410 can be a multi-layer heat insulation cotton, which can play a multiple heat insulation role, reduce heat dissipation, and effectively improve the temperature rise problem of the extension tube 200 and the shield 300 to avoid the problem of scalding. It can be designed according to the use classification of the steam cleaning machine to meet the actual use needs.

[0049] In addition, the isolation pad 410 can also be made of other materials, such as foamed plastics. After the extension tube 200, the shield 300 and the steam pipe 400 are assembled, the foaming material is injected into the accommodating cavity 301 for foaming. The foaming material is used to form a heat insulation layer to reduce heat conduction, which can effectively improve the temperature rise problem of the extension tube 200 and the shield 300 and avoid the problem of burning hands. Other heat insulation materials are not described one by one here, as long as they can meet the heat insulation requirements.

[0050] It can be understood that in some embodiments of the first aspect of the present utility model, such as Figure 3 As shown, the side of the shield 300 facing away from the extension tube 200 is provided with a plurality of first insulation ribs 310, and the plurality of first insulation ribs 310 are spaced apart along the axial direction of the steam pipe 400. When the user holds the shield 300 and the extension tube 200 with his hands, he will hold the plurality of first insulation ribs 310, which are protruding flat ribs. By providing a plurality of first insulation ribs 310, the contact area between the user's hand and the extension tube 200 can be reduced, which is conducive to eliminating the problem of scalding. Moreover, the plurality of first insulation ribs 310 can also act as heat dissipation fins, helping the shield 300 to dissipate heat, so as to reduce the temperature of the shield 300, which is helpful for the user to hold and reduce the risk of scalding. The plurality of first insulation ribs 310 are closely arranged, and the distance between two adjacent first insulation ribs 310 is less than the width of a finger, so that the user will not touch the shield 300. The first heat-insulating rib 310 also acts as a reinforcing rib, increasing the structural strength and rigidity of the shield 300, making it more stable when the user holds the shield 300. In addition, the protruding first heat-insulating rib 310 increases the size of the shield 300, which is beneficial for the user to hold the shield 300 and increases comfort.

[0051] Of course, the first heat-insulating ribs 310 can also be arranged along the axial direction of the steam pipe 400. A plurality of first heat-insulating ribs 310 are distributed along the circumference of the steam pipe 400, which can also play a role in heat insulation, reduce the contact area between the user's hand and the extension tube 200, and help eliminate the problem of scalding. In addition, the first heat-insulating ribs 310 can also adopt other shapes as long as they can meet the isolation requirements, which will not be described one by one.

[0052] In some embodiments of the first aspect of the present invention, Figure 5 and Figure 8As shown, a plurality of second heat-insulating ribs 320 are also provided on the side of the shield 300 facing the extension tube 200, and the plurality of second heat-insulating ribs 320 are spaced apart along the axial direction of the steam pipe 400, and the second heat-insulating ribs 320 may abut the steam pipe 400. The shield 300 supports the steam pipe 400 through the plurality of second heat-insulating ribs 320, which reduces the contact area between the shield 300 and the steam pipe 400, reduces the heat conduction, and is conducive to reducing the temperature of the shield 300, and avoids the problem of users touching the shield 300 and getting hot. Considering that the steam pipe 400 is a round tube, the side of the second heat-insulating rib 320 contacting the steam pipe 400 can be set as an arc surface to improve the support for the steam pipe 400. Of course, the second heat-insulating rib 320 can also abut the isolation pad 410, or abut the isolation pad 410 and the steam pipe 400 at the same time, both of which can play a supporting role. Since the second heat-insulating ribs 320 will not touch the user's hand, the distribution intervals of the second heat-insulating ribs 320 are relatively large, which minimizes the contact area between the shield 300 and the steam pipe 400 and reduces the conduction of heat. The second heat-insulating ribs 320 also act as reinforcing ribs, increasing the structural strength and rigidity of the shield 300 and reducing the risk of deformation of the shield 300.

[0053] In some embodiments of the first aspect of the present invention, Figure 5 and Figure 6 As shown, a plurality of third heat-insulating ribs 210 are provided on the outer wall of the extension tube 200, and the plurality of third heat-insulating ribs 210 are located in the accommodating cavity 301, and are distributed at intervals along the axial direction of the extension tube 200, and the third heat-insulating ribs 210 abut against the steam pipe 400. The extension tube 200 contacts the steam pipe 400 through the plurality of third heat-insulating ribs 210, which reduces the contact area between the extension tube 200 and the steam pipe 400, reduces the conduction of heat, and is conducive to reducing the temperature of the extension tube 200, and avoids the problem of users touching the extension tube 200 and getting hot. Of course, the third heat-insulating rib 210 can also abut against the isolation pad 410, or abut against the isolation pad 410 and the steam pipe 400 at the same time, both of which can play a supporting role. Since it will not touch the user's hand, the distribution interval of the third heat-insulating ribs 210 is relatively large, which minimizes the contact area between the extension tube 200 and the steam pipe 400 and reduces the conduction of heat.

[0054] Reference Fig. 9The outer wall of the extension tube 200 is also provided with a fourth rib 220, which is arranged along the extension tube 200. The fourth rib 220 intersects with a plurality of third heat-insulating ribs 210 to form a rib plate of a composite structure. The fourth rib 220 may contact the steam pipe 400 or may not contact the steam pipe 400. The side of the third heat-insulating rib 210 facing the steam pipe 400 may be set as an arc surface, the arc surface is in contact with the steam pipe 400, and the fourth rib 220 is flush with the arc surface. The fourth rib 220 also contacts the steam pipe 400, which is conducive to positioning the steam pipe 400 and improving the structural stability. The extension tube 200 is usually an injection molded part. The inner hole of the extension tube 200 serves as an air suction channel. The cleaning brush of the steam cleaning machine has a suction port to suck away sewage, garbage and other dirt, and the dirt passes through the extension tube 200. The fourth rib 220 and the plurality of third insulation ribs 210 form a rib plate of a composite structure, which is beneficial to increase the structural strength and rigidity of the extension tube 200 and improve the reliability of the extension tube 200. When the cleaning brush is lifted for cleaning, the extension tube 200 has sufficient strength to meet the use requirements.

[0055] It is understandable that a plurality of fourth ribs 220 may be provided, and the plurality of fourth ribs 220 are distributed circumferentially along the outer wall of the extension tube 200, while the third thermal insulation ribs 210 surround the extension tube 200. The plurality of fourth ribs 220 and the plurality of third thermal insulation ribs 210 form a grid, so that the outer wall of the extension tube 200 is arranged with rib plates. On the one hand, the area of ​​the user's hand contacting the extension tube 200 can be reduced, which is conducive to eliminating the problem of hot hands; on the other hand, the plurality of fourth ribs 220 and the plurality of third thermal insulation ribs 210 act as reinforcing ribs, and the structural strength and rigidity of the extension tube 200 are comprehensively improved, thereby improving the reliability of use. The plurality of fourth ribs 220 and the plurality of third thermal insulation ribs 210 also act as heat dissipation fins, which help the extension tube 200 to dissipate heat, thereby reducing the temperature of the extension tube 200, which helps the user to hold it and reduces the risk of hot hands.

[0056] Reference Figure 6 and Figure 7It can be understood that the assembly structure between the shield 300 and the extension tube 200 is as follows: the shield 300 has two symmetrically arranged side panels 330, the two side panels 330 abut against the outer wall of the extension tube 200, a buckle 331 is provided on the inner wall of the side panel 330, and a slot 201 is provided on the outer wall of the extension tube 200, and the buckle 331 is buckled into the slot 201 to realize the connection and fixation of the shield 300 and the extension tube 200. The shield 300 is an injection molded part with a certain elasticity. The side panel 330 can be deformed by pressing hard, so that the buckle 331 and the slot 201 can be assembled and disassembled, which is convenient to operate. Of course, the buckle can also be set on the outer wall of the extension tube 200, and the slot can be set on the inner wall of the side panel 330, which can also meet the functions of assembly and convenient disassembly. In addition, other forms of fixing structures can also be used, such as fixing the shield 300 and the extension tube 200 by screws or by interference fit, etc., which can meet the use requirements.

[0057] Reference Figure 6 and Figure 7 It is understandable that a latch 230 is also provided on the outer wall of the extension tube 200, and a pin hole 332 is provided on the inner wall of the side plate 330. The latch 230 cooperates with the pin hole 332 to realize the positioning and assembly of the shield 300 and the extension tube 200, and then the connection and fixation of the shield 300 and the extension tube 200 are realized by the cooperation of the buckle 331 and the card slot 201, thereby optimizing the assembly process. Moreover, the pin hole 332 is provided only at one end of the shield 300, which can play a foolproof role.

[0058] It is understandable that since the steam pipe 400 is arranged in the accommodating chamber 301, once steam leakage occurs, it will bring danger, so the accommodating chamber 301 is a sealed chamber, such as Figures 6 to 9 As shown, both ends of the shield 300 are open, and a first sealing plate 240 and a second sealing plate 250 are provided on the outer wall of the extension tube 200. After the shield 300 and the extension tube 200 are assembled, one end of the shield 300 abuts against the first sealing plate 240, and the other end abuts against the second sealing plate 250 to achieve sealing, which is beneficial to prevent steam leakage, improve safety, and also beneficial to protect the steam pipe 400.

[0059] In addition, a sealing gasket or sealant may be provided at the connection between the shield 300 and the first sealing plate 240 and the second sealing plate 250 to further improve the sealing performance. Alternatively, slots may be provided at both ends of the shield 300, and the first sealing plate 240 and the second sealing plate 250 may be inserted into the slots respectively to form a labyrinth-like sealing structure.

[0060] Reference Figure 3In some embodiments of the first aspect of the utility model, the extension tube assembly 100 further has a hook 500, which is composed of a first bracket 510 and a second bracket 520. The first bracket 510 and the second bracket 520 are provided with grooves on their opposite surfaces. During assembly, the first bracket 510 and the second bracket 520 cooperate to clamp the shield 300 and the extension tube 200. The shield 300 and the extension tube 200 are placed in the inner cavity formed by the two grooves. The first bracket 510 and the second bracket 520 can be fixed by screws or by clamping. The first bracket 510 and the second bracket 520 are both provided with a hook 530, which is used to hang the extension tube assembly on the outer wall or the hook of the wall of the steam cleaning machine for easy storage.

[0061] Reference Figure 1 The second embodiment of the utility model provides a steam cleaning machine, which includes a body 600, a hose 700, a handle 800, a cleaning brush 900 and an extension tube assembly 100 of the first embodiment. The two ends of the hose 700 are respectively connected to the body 600 and the handle 800. The cleaning brush 900 is connected to the handle 800 through the extension tube assembly 100. The extension tube assembly can be disassembled, and the cleaning brush 900 can also be directly installed on the handle 800. A plurality of casters 610 are arranged at the bottom of the body 600, and the body 600 can be moved to various use locations by the casters 610, so that the user can clean conveniently.

[0062] The extension tube assembly 100 includes an extension tube 200, a shield 300 and a steam pipe 400, wherein the shield 300 is connected to the outer wall of the extension tube 200, a receiving cavity 301 is formed between the shield 300 and the extension tube 200, the steam pipe 400 is arranged in the receiving cavity 301, and an isolation pad 410 is provided on the outer wall of the steam pipe 400.

[0063] The body 600 has a water tank and a device for preparing steam inside. The prepared steam is output to the handle 800 through the hose 700, and then transported to the cleaning brush 900 through the steam pipe 400. When the steam cleaning machine is running, due to the high temperature of the steam, the steam pipe 400 is also high in temperature. The steam pipe 400 is arranged in the accommodating cavity 301 between the shield 300 and the extension tube 200. The shield 300 is used to isolate the user from contacting the steam pipe 400. At the same time, the isolation pad 410 on the outer wall of the steam pipe 400 is used to reduce the conduction of heat, thereby reducing the temperature of the extension tube 200 and the shield 300. When the user contacts the shield 300 and the extension tube 200, the problem of scalding is eliminated, thereby improving the user experience.

[0064] A plurality of first heat-insulating ribs 310 are provided on the side of the shield 300 facing away from the extension tube 200. The plurality of first heat-insulating ribs 310 are spaced apart along the axial direction of the steam pipe 400. When the user holds the shield 300 and the extension tube 200 with his hands, the plurality of first heat-insulating ribs 310 will be held. The first heat-insulating ribs 310 are protruding flat ribs. By providing a plurality of first heat-insulating ribs 310, the contact area between the user's hand and the extension tube 200 can be reduced, which is conducive to eliminating the problem of being hot. Moreover, the plurality of first heat-insulating ribs 310 can also act as heat-dissipating fins, helping the shield 300 to dissipate heat, so as to reduce the temperature of the shield 300, which is helpful for the user to hold and reduce the risk of being hot. The plurality of first heat-insulating ribs 310 are closely arranged, and the distance between two adjacent first heat-insulating ribs 310 is less than the width of a finger, so that the user will not touch the shield 300. The first heat-insulating rib 310 also acts as a reinforcing rib, increasing the structural strength and rigidity of the shield 300, making it more stable when the user holds the shield 300. In addition, the protruding first heat-insulating rib 310 increases the size of the shield 300, which is beneficial for the user to hold the shield 300 and increases comfort.

[0065] Reference Figure 1 and Figure 2 , wherein the handle 800 and the cleaning brush 900 directly have two extension tube assemblies 100. Since the extension tube assembly 100 is detachable, one extension tube assembly 100, three extension tube assemblies 100 or a greater number of extension tube assemblies 100 may also be used.

[0066] Reference Figure 6 and Figure 7The male connector 260 and the female connector 270 are respectively provided at the axial ends of the extension tube 200. The male connector 260 and the female connector 270 can be connected by plug-in connection to realize the assembly of two extension tube assemblies 100. The outer diameter of the male connector 260 matches the inner diameter of the female connector 270. A positioning groove 261 is provided on the outer wall of the male connector 260. The female connector 270 is connected with a button 271. The outer wall of the female connector 270 is provided with a mounting seat 272. A rotating shaft 2711 is provided in the middle of the button 271. The rotating shaft 2711 is hinged to the mounting seat 272. A positioning pin 2712 is provided at one end of the button 271. The mounting seat 272 is provided with a through hole for the positioning pin 2712 to extend into the inner hole of the female connector 270. The mounting seat 272 is also connected with a spring 273. The spring 273 abuts against the other end of the button 271. Under the action of the spring 273, the button 271 keeps the positioning pin 2712 extending into the inner hole of the female connector 270. When the male connector 260 and the female connector 270 are assembled, the positioning pin 2712 is inserted into the positioning groove 261 to achieve connection and fixation. When disassembly is required, the button 271 is pressed against one end of the spring 273 to disengage the positioning pin 2712 from the positioning groove 261. The disassembly is easy and convenient. The handle 800 is provided with a plug-in structure for matching the female connector 270, and the cleaning brush 900 is provided with a plug-in structure for matching the male connector 260. The number of extension tube assemblies 100 can be freely selected for assembly.

[0067] It can be understood that in order to realize the assembly of multiple extension pipe assemblies 100, the male connector 260 is provided with a first pipe connector 262, and the female connector 270 is provided with a second pipe connector 274. The first pipe connector 262 and the second pipe connector 274 can be plugged in, and both ends of the steam pipe 400 are installed on the first pipe connector 262 and the second pipe connector 274 to realize the series connection of multiple extension pipe assemblies 100.

[0068] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Extension tube assembly, It is characterized in that include: Extension tube; A shield connected to the outer wall of the extension tube, wherein a receiving cavity is formed between the shield and the extension tube; The steam pipe is arranged in the accommodating cavity. The outer wall of the steam pipe is provided with an isolation pad, which is made of a heat-insulating material.

2. The extension tube assembly according to claim 1, It is characterized in that The isolation pad is at least one layer of heat-insulating cotton, and the heat-insulating cotton wraps the steam pipe.

3. The extension tube assembly according to claim 1, It is characterized in that A plurality of first heat-insulating ribs are arranged on the side of the shield facing away from the extension tube, and the plurality of first heat-insulating ribs are distributed at intervals.

4. The extension tube assembly according to claim 1 or 3, It is characterized in that A plurality of second heat-insulating ribs are arranged on the side of the shield facing the extension tube, the plurality of second heat-insulating ribs are distributed at intervals, and the second heat-insulating ribs abut against the steam pipe or the isolation pad.

5. The extension tube assembly according to claim 1, It is characterized in that The outer wall of the extension tube is provided with a plurality of third thermal insulation ribs, the plurality of third thermal insulation ribs are located in the accommodating cavity and are distributed at intervals, and the third thermal insulation ribs abut against the steam pipe or the isolation pad.

6. The extension tube assembly according to claim 5, It is characterized in that The outer wall of the extension tube is provided with a fourth rib, the fourth rib is arranged along the axial direction of the extension tube and penetrates through the plurality of third heat-insulating ribs.

7. The extension tube assembly according to claim 1, It is characterized in that The shield has two symmetrically arranged side panels, the two side panels abut against the outer wall of the extension tube, the inner wall of the side panel is provided with a buckle, and the outer wall of the extension tube is provided with a slot matching the buckle.

8. The extension tube assembly according to claim 7, It is characterized in that The outer wall of the extension tube is provided with a latch pin, and the inner wall of the side plate is provided with a pin hole matching the latch pin.

9. The extension tube assembly according to claim 1, It is characterized in that The extension tube is connected with a first hanger and a second hanger, and the first hanger and the second hanger cooperate to clamp the shield and the extension tube.

10. Steam cleaning machine, It is characterized in that Comprising the extension tube assembly according to any one of claims 1 to 9.

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