Suction tube assembly for suction-type cleaning device

Abstract

The invention discloses a suction pipe assembly for suction type cleaning equipment. The suction tube assembly comprises a rigid tube extending along a longitudinal center line, a fixed mounting seat fixedly mounted at one end of the rigid tube, a handle lever rotatably mounted at the fixed mounting seat at an extending position and a folding position, and a rotary mounting seat rotatably mounted at the fixed mounting seat at a first position and a second position, the connecting short pipe is fixedly arranged on the rotary mounting seat and is in fluid communication with the rigid pipe; the flexible pipe is provided with a hard connector part; the first interlocking mechanism is used for keeping the hard connector part on the rotary mounting seat; the second interlocking mechanism is used for keeping the hard connector part on the handle rod; the other end part of the rigid pipe is connected with a suction nozzle of suction type cleaning equipment; the suction pipe assembly is simple in structure, wide in application range and high in cleaning efficiency, connection between the handle rod and the rigid pipe when the handle rod is located at the stretching position is reinforced through the hard connector portion of the flexible pipe, and the stability of equipment in the cleaning process is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of surface cleaning equipment, and in particular to a suction pipe assembly for a suction cleaning equipment. Background Art

[0002] In order to improve the cleaning efficiency and cleaning range, the push rod part of many cleaning equipment is arranged in a rotatable two-section type. The upper push rod can rotate relative to the lower push rod, so as to reduce the distance between the lower push rod and the ground when encountering a low surface to be cleaned. However, the hinge of the two-section push rod is unstable. When it is necessary to keep the two sections of the push rod on the same center line for cleaning, the upper push rod is easy to shake, which makes the user apply force unevenly, affecting the cleaning efficiency. Summary of the invention

[0003] In order to solve the above technical problems, an object of the present invention is to provide a suction pipe assembly for a suction cleaning device.

[0004] To achieve the above object, the present invention adopts the following technical solution: a suction pipe assembly for a suction cleaning device, the suction pipe assembly comprising: a rigid tube extending along a longitudinal centerline and having a first tube end and a second tube end spaced apart from each other in a longitudinal direction, the first tube end being attachable to a nozzle of the extraction cleaning device; A fixed mounting seat, which is fixedly mounted at the second pipe end; A handle bar, which is rotatably mounted on the fixed mounting seat in an extended position and a folded position about a first pivot axis; in the extended position, the bar centerline of the handle bar is parallel to or coincides with the longitudinal centerline; in the folded position, the bar centerline of the handle bar intersects with the longitudinal centerline; A rotating mounting seat, which can be rotatably mounted on the fixed mounting seat at a first position and a second position around a second pivot axis; A connecting short tube, which is fixedly arranged on the rotating mounting seat and is in fluid communication with the rigid tube; in the first position, the tube centerline of the connecting short tube coincides with or is parallel to the longitudinal centerline; in the second position, the tube centerline of the connecting short tube forms an angle greater than 0° and less than or equal to 30° with the longitudinal centerline; a flexible pipe having a hard joint portion, the hard joint portion being configured to be detachably mounted on the swivel mount and to be fluidically connected to the connecting short pipe; a first interlocking mechanism disposed between the hard joint portion and the rotating mounting seat and used to retain the hard joint portion on the rotating mounting seat, the first interlocking mechanism having an operable first unlocking member; and The second interlocking mechanism is arranged between the hard joint part and the handle bar and is used to keep the hard joint part on the handle bar. The second interlocking mechanism has an operable second unlocking member.

[0005] In the above technical solution, it is further preferred that the second interlocking mechanism includes a second latch located at the handle rod and a second lock groove distributed on the hard joint part, and the second latch can selectively move between a locked position and an unlocked position, and in the locked position the second latch is placed in the second lock groove.

[0006] In the above technical solution, it is further preferred that the second latch is configured to move along the longitudinal direction between a locking position and an unlocking position.

[0007] In the above technical solution, it is further preferred that it also includes: a pull rod, which is movably arranged on the handle rod along the longitudinal direction, the second latch is fixed on the pull rod, and the second unlocking member is arranged in transmission with the pull rod.

[0008] In the above technical solution, it is further preferred that it also includes: a second resetting element, which is arranged between the pull rod and the handle rod.

[0009] In the above technical solution, it is further preferred that the handle rod includes a handle for holding, and the second unlocking member is arranged at the handle.

[0010] In the above technical solution, it is further preferred that it also includes: a third interlocking mechanism, which is arranged between the handle rod and the fixed mounting seat and is used to fix the handle rod and the fixed mounting seat to each other to prevent the handle rod from rotating around the first pivot axis; the third interlocking mechanism includes a third latch located at the handle rod and a third lock slot distributed on the fixed mounting seat, the third latch can selectively move between a locked position and an unlocked position, in the locked position the third latch is inserted into the third lock slot, and the third latch is fixed on the pull rod.

[0011] In the above technical solution, it is further preferred that a distance that the third latch moves along the longitudinal direction between the locked position and the unlocked position is greater than or equal to a distance that the second latch moves along the longitudinal direction between the locked position and the unlocked position.

[0012] In the above technical solution, it is further preferred that the first interlocking mechanism includes a first latch and a first reset element located at the rotating mounting seat and a first lock groove distributed on the hard joint portion, and the first latch can selectively move between a locked position and an unlocked position, and in the locked position the first latch is inserted into the first lock groove, and the first reset element is configured to keep the first latch in the locked position.

[0013] In the above technical solution, it is further preferred that the rotating mounting seat and the connecting short pipe are integrally formed as a single component.

[0014] In the above technical solution, it is further preferred that the hard joint portion defines a gripping portion for a user to grasp.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The suction tube assembly of the present invention has a simple structure and is convenient for rotating the handle rod between the extended position and the folded position. It is suitable for cleaning surfaces to be cleaned in different environments, has a wide range of applications, and has high cleaning efficiency. The connection between the handle rod and the rigid tube when in the extended position is reinforced by the hard joint portion of the flexible tube, thereby ensuring the stability of the equipment during the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a suction tube assembly provided in an embodiment of the present invention.

[0017] Figure 2 for Figure 1 A schematic diagram of a three-dimensional exploded structure of a suction pipe assembly; Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the suction nozzle of the cleaning device when the handle rod of the suction pipe assembly is in the extended position; Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the suction nozzle of the cleaning device when the handle rod of the suction pipe assembly is in a folded position; Figure 5 for Figure 1 A schematic diagram of a structure in which the rotating mounting seat is in a second position and the handle bar is in an extended position; Figure 6 for Figure 5 A local enlarged schematic diagram of the middle A; Figure 7 for Figure 5 A partial enlarged schematic diagram of point B in the middle; Figure 8 for Figure 1A schematic diagram of a structure in which the rotating mounting seat is in a first position and the handle bar is in an extended position; Fig. 9 for Figure 8 A partial enlarged schematic diagram of point C in the middle; Fig.10 for Figure 1 A schematic diagram of the structure in which the handle bar is in a folded position; Fig.11 for Figure 2 A schematic diagram of the three-dimensional structure of the flexible pipe; Fig.12 for Figure 2 A schematic diagram of a three-dimensional structure in which the connecting short pipe is installed on a rotating mounting seat; Fig.13 for Figure 2 A schematic diagram of a three-dimensional exploded structure of a handle bar; Fig.14 for Figure 8 A schematic diagram of the travel of the second latch from the locked position to the unlocked position; Fig.15 for Fig.14 A partial enlarged schematic diagram of point D in the middle; Fig.16 for Figure 8 A schematic diagram of the travel of the third latch from the locked position to the unlocked position; Fig.17 for Fig.16 A partial enlarged schematic diagram of point E in the middle.

[0018] Wherein: 100, suction tube assembly; 1, rigid tube; 101, first tube end; 102, second tube end; 2, fixed mounting seat; 3, handle rod; 31, handle; 32, rear cover; 33, front cover; 34, first notch; 35, second notch; 4, rotating mounting seat; 5, connecting short tube; 6, flexible tube; 61, hard joint part; 62, tube part; 7, first interlocking mechanism; 71, first unlocking member; 72, first latch; 73, first reset element; 74, first lock groove; 8, second interlocking mechanism; 81, second unlocking member; 82, second latch; 83, second lock groove; 9, third interlocking mechanism; 91, third latch; 92, third lock groove; 10, pull rod; 11, second reset element. DETAILED DESCRIPTION

[0019] In order to describe the technical content, structural features, achieved purposes and effects of the application in detail, the technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0020] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0021] The "upper" and "lower" in the present invention are as follows: Figure 1 Upper and lower shown.

[0022] An embodiment of the present invention provides a suction pipe assembly for a suction cleaning device. The suction pipe assembly is configured to be foldable so as to facilitate cleaning of different surfaces to be cleaned.

[0023] like Figure 1 As shown, the suction tube assembly 100 includes a rigid tube 1 , a fixed mounting seat 2 , a handle bar 3 , a rotating mounting seat 4 , a connecting short tube 5 , a flexible tube 6 , a first interlocking mechanism 7 and a second interlocking mechanism 8 .

[0024] like Figure 2-4 As shown, the rigid tube 1 extends in the up-down direction and has a first tube end 101 and a second tube end 102 which are away from each other in the up-down direction. The first tube end 101 is located below the second tube end 102 to be attached to the suction nozzle 200 of the cleaning device, and the rigid tube 1 is fluidically connected to the suction nozzle.

[0025] like Figure 1-10 As shown, the fixed mounting seat 2 is fixedly mounted on the second pipe end 102 for transmission connection between the rigid pipe 1 and other components; the handle bar 3 can be rotatably connected to the fixed mounting seat 2 around a first pivot axis X1, and the rotating mounting seat 4 can be rotatably connected to the fixed mounting seat 2 around a second pivot axis X2.

[0026] like Figure 3 , 4, 5, 8, and 10, the handle bar 3 can rotate around the first pivot axis X1 between the extended position and the folded position, and the rigid tube 1 has a longitudinal center line X3 extending in the up-down direction. When the handle bar 3 is in the extended position (see FIG. Figure 3 , 5 , 8), the rod center line X4 of the handle rod 3 is parallel to or coincides with the longitudinal center line X3, at this time the user can push the handle rod 3 to drive the suction nozzle 200 of the cleaning device to move back and forth along the surface to be cleaned; when the handle rod 3 is in the folded position (see attached Figure 4 , 10 ), the rod centerline X4 of the handle rod 3 intersects with the longitudinal centerline X3, and the user lowers the distance between the rigid tube 1 and the ground, so that the suction nozzle 200 of the cleaning device can enter the low and narrow surface to be cleaned, such as under the sofa and under the bed, for cleaning. At the same time, the user pushes the suction nozzle 200 to move along the surface to be cleaned by holding the handle rod 3 folded relative to the rigid tube 1, which is convenient to operate and helps to improve the user's experience. The handle rod 3 includes a handle 31 for the user to hold, and the handle 31 is located at one end away from the fixed mounting seat 2.

[0027] like Figure 5 , 8 As shown, the swivel mount 4 rotates around the second pivot axis X2 between the first position and the second position, the connecting short tube 5 is fixedly arranged on the swivel mount 4 to rotate with the swivel mount 4 between the first position and the second position, the connecting short tube 5 is in fluid communication with the rigid tube 1, and in the embodiment of the present invention, the connecting short tube 5 and the swivel mount 4 are integrally formed as a single component. When the swivel mount 4 rotates to the first position, the tube centerline X5 of the connecting short tube 5 is parallel to or coincides with the longitudinal centerline X3; when the swivel mount 4 rotates to the second position, the tube centerline X5 of the connecting short tube 5 and the longitudinal centerline X3 form an angle α greater than 0° and less than or equal to 30°.

[0028] like Figure 1 , 11As shown, the flexible tube 6 is detachably mounted on the rotating mounting seat 4. The flexible tube 6 has a hard joint portion 61, which is detachably connected to the rotating mounting seat 4 through a first interlocking mechanism 7. When the hard joint portion 61 is separated from the rotating mounting seat 4, the hard joint portion 61 can also be engaged with other accessories to cooperate with suitable accessories to clean different surfaces to be cleaned. The hard joint portion 61 also defines a gripping portion for the user to grasp. When the hard joint 61 is engaged with other accessories, the user can grasp the gripping portion to move the engaged accessories. The flexible tube 6 also includes a tube portion 62 connected to the hard joint portion 61. The tube portion 62 is made of a flexible material and can be bent and stretched at will. When the hard joint portion 61 is engaged with the accessory, the tube portion 62 improves the flexibility of the accessory's movement. When the hard joint portion 61 is engaged with the rotating mounting seat 4, it is convenient for the rigid tube 1 to rotate, thereby improving the flexibility of the suction nozzle 200's movement.

[0029] like Figure 1 , 6 As shown in Figures 11 and 12, the first interlocking mechanism 7 is arranged between the hard joint part 61 and the rotating mounting seat 4, and is used to keep the hard joint part 61 on the rotating mounting seat 4. The first interlocking mechanism 7 includes an operable first unlocking member 71, a first latch 72 and a first reset element 73 located at the rotating mounting seat 4, and a first lock groove 74 distributed on the hard joint part 61. The first latch 72 can selectively move between a locked position and an unlocked position; the first unlocking member 71 is in transmission connection with the first latch 72, and when the first unlocking member 71 is triggered, the first latch 72 moves from the locked position to the unlocked position. When the hard joint part 61 is connected to the rotating mounting seat 4, the first latch 72 is located in the locked position and is placed in the first lock groove 74 to keep the hard joint part 61 on the rotating mounting seat 4; when the first unlocking member 71 is triggered, the first latch 72 withdraws from the first lock groove 74, and the hard joint part 61 and the rotating mounting seat 4 can be separated. The first reset element 73 is configured to keep the first latch 72 in the locked position, and when the first unlocking member 71 releases the triggering condition, the first reset element 73 pushes the first latch 72 to reset from the unlocked position to the locked position. The hard joint part 61 can only rotate 30° relative to the rigid tube 1 on the rotating mounting seat 4, so as to prevent the hard joint part 61 from shaking too much and falling off from the rotating mounting seat 4, and also to prevent the shaking too much from affecting the stability of the equipment cleaning.

[0030] like Figure 1 , 9As shown, the second interlocking mechanism 8 is arranged between the hard joint part 61 and the handle bar 3, and is used to keep the hard joint part 61 on the handle bar 3; the second interlocking mechanism 8 includes an operable second unlocking member 81, a second latch 82 located at the handle bar 3, and a second locking groove 83 arranged on the hard joint part 61. The second latch 82 can selectively move between a locked position and an unlocked position. When the hard joint part 61 is locked on the handle bar 3, the second latch 82 is in the locked position and the second latch 82 is placed in the second locking groove 83 to keep the hard joint part 61 on the handle bar 3. The second latch 82 moves between the locked position and the unlocked position along the extension direction of the rod center line X4 of the handle bar 3. The second unlocking member 81 is in transmission connection with the second latch 82. When the second unlocking member 81 is triggered, the second latch 82 moves from the locked position to the unlocked position. The second unlocking member 81 is a pullable ring and is arranged at the handle 31, so that the user can pull the second unlocking member 81 to unlock the second interlocking mechanism 8. When the second latch 82 is located at the locking position and placed in the second locking groove 83, the hard joint portion 61 is connected to the handle bar 3 through the second interlocking mechanism 8; when the second latch 82 moves to the unlocking position, it moves out of the second locking groove 83, and the hard joint portion 61 is separated from the handle bar 3.

[0031] like Figure 5 , 7 As shown in Figures 10 and 10, the suction tube assembly 100 further includes a third interlocking mechanism 9 disposed between the handle bar 3 and the fixed mounting seat 2. The third interlocking mechanism 9 is used to fix the handle bar 3 and the fixed mounting seat 2 to each other so as to prevent the handle bar 3 from rotating around the first pivot axis X1. The third interlocking mechanism 9 includes a third latch 91 located at the handle bar 3 and a third lock slot 92 provided on the fixed mounting seat 2. The third latch 91 can selectively move between a locked position and an unlocked position. When the third latch 91 is located at the locked position and placed in the third lock slot 92, the handle bar 3 is fixed to the fixed mounting seat 2 and maintained in the extended position. When the third latch 91 moves to the unlocked position, it moves out of the third lock slot 92, and the handle bar 3 can rotate relative to the fixed mounting seat 2 around the first pivot axis X1.

[0032] like Fig.13As shown, the suction tube assembly 100 also includes a pull rod 10 and a second reset element 11 disposed on the handle rod 3. The pull rod 10 is movably disposed on the handle rod 3 along the extension direction of the rod centerline X4. The second latch 82 and the third latch 91 are both fixed on the pull rod 10. The second unlocking member 81 is in transmission connection with the pull rod 10. When the second unlocking member 81 is pulled, the pull rod 10 moves in the longitudinal direction so that the second latch 82 and the third latch 91 are both moved from the locked position to the unlocked position. The second reset element 11 is connected between the pull rod 10 and the handle rod 3. The second reset element 11 is used to reset the pull rod 10 when the second unlocking member 81 releases the trigger condition so that the second latch 82 and the third latch 91 remain in the locked position.

[0033] The handle bar 3 includes a rear cover 32 and a front cover 33, which are combined to form a shell capable of accommodating the pull rod 10 moving in the up and down directions, and the shell is provided with a first notch 34 for the second latch 82 to move between the locked position and the unlocked position and a second notch 35 for the third latch 91 to move between the locked position and the unlocked position.

[0034] like Figure 14-17 As shown, the groove depth of the third lock groove 92 is greater than the groove depth of the second lock groove 83, and the pull rod 10 is pulled to move in the longitudinal direction. When the pull rod 10 moves a distance d1 so that the second lock latch 82 moves from the locked position to the unlocked position, the third lock latch 91 is still partially located in the third lock groove 92, and the third lock latch 91 has not moved to the unlocked position. The pull rod 10 needs to move a distance d2 to move the third lock latch 91 from the locked position to the unlocked position. The distance d2>the distance d1. When the third lock latch 91 moves to the unlocked position, the second lock latch 82 must have moved to the unlocked position.

[0035] like Figure 3 , 5 As shown, when the latches of the first interlocking mechanism 7, the second interlocking mechanism 8 and the third interlocking mechanism 9 are all placed in the corresponding locking grooves, the handle bar 3 is fixed on the fixed mounting seat 2 in the extended position by the third interlocking mechanism 9, and the handle bar 3 cannot shake relative to the rigid tube 1. The hard joint portion 61 fixedly connected to the rotating mounting seat 4 is locked on the handle bar 3 by the second interlocking mechanism 8, further strengthening the connection between the handle bar 3 and the fixed mounting seat 2, stabilizing the handle bar 3 in the extended position, and the handle bar 3 cannot be rotated from the extended position to the folded position. At this time, when the user pushes the handle bar 3 in the extended position, there is a stable point of force, and the handle bar 3 will not shake, and the stability is improved; at the same time, the hard joint portion 61 is restricted in the first position and cannot rotate relative to the rigid tube 1, further improving the stability of the suction tube assembly 100 during use. The handle bar 3 and the hard joint portion 61 stably connected to the rigid tube 1 ensure the stability of the cleaning process and improve the cleaning efficiency.

[0036] like Figure 5 As shown, when the second locking latch 82 of the second interlocking mechanism 8 withdraws from the second locking groove 83 , the hard joint portion 61 is unlocked from the handle bar 3 , and the hard joint portion 61 can rotate relative to the rigid tube 1 around the second pivot axis X2 .

[0037] like Figure 1 , 11 As shown, when the latches of the first interlocking mechanism 7 and the second interlocking mechanism 8 are removed from the corresponding locking grooves, the hard joint part 61 can be removed from the rotating mounting seat 4, and can also be docked with other accessories for cleaning. In the embodiment of the present invention, when the hard joint part 61 is connected to the rotating mounting seat 4 and locked with the handle bar 3, the second interlocking mechanism 8 between the hard joint part 61 and the handle bar 3 needs to be unlocked first before the first interlocking mechanism 7 can be unlocked to remove the hard joint part 61 from the rotating mounting seat 4. The second interlocking mechanism 8 is used to keep the hard joint part 61 connected to the handle bar 3 in the first position, increase the stability of the suction tube assembly 100 during the cleaning process, and avoid accidentally touching the first unlocking member 71 to cause the hard joint part 61 to fall, thereby improving the safety of the equipment.

[0038] like Figure 4 , 10 As shown, when the latches of the second interlocking mechanism 8 and the third interlocking mechanism 9 are moved out of the corresponding locking grooves, the handle rod 3 can be rotated relative to the rigid tube 1 to reduce the distance between the rigid tube 1 and the ground, making it easier for the suction nozzle to clean the low and narrow surface to be cleaned, and the rotatable and foldable handle rod 3 is easy to store.

[0039] The suction tube assembly of the present invention has a simple structure and is convenient for rotating the handle rod between the extended position and the folded position. It is suitable for cleaning surfaces to be cleaned in different environments, has a wide range of applications, and has high cleaning efficiency. The connection between the handle rod and the rigid tube when in the extended position is reinforced by the hard joint portion of the flexible tube, thereby ensuring the stability of the equipment during the cleaning process.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and the scope of protection of the present invention is defined by the attached claims, description and their equivalents.

Claims

1. A suction pipe assembly for a suction cleaning device, characterized in that: The suction tube assembly includes: a rigid tube extending along a longitudinal centerline and having a first tube end and a second tube end spaced apart from each other in a longitudinal direction, the first tube end being attachable to a nozzle of the extraction cleaning device; A fixed mounting seat, which is fixedly mounted at the second pipe end; A handle bar, which is rotatably mounted on the fixed mounting seat in an extended position and a folded position about a first pivot axis; in the extended position, the bar centerline of the handle bar is parallel to or coincides with the longitudinal centerline; in the folded position, the bar centerline of the handle bar intersects with the longitudinal centerline; A rotating mounting seat, which can be rotatably mounted on the fixed mounting seat at a first position and a second position around a second pivot axis; A connecting short tube, which is fixedly arranged on the rotating mounting seat and is in fluid communication with the rigid tube; in the first position, the tube centerline of the connecting short tube coincides with or is parallel to the longitudinal centerline; in the second position, the tube centerline of the connecting short tube forms an angle greater than 0° and less than or equal to 30° with the longitudinal centerline; a flexible pipe having a hard joint portion, the hard joint portion being configured to be detachably mounted on the swivel mount and to be fluidically connected to the connecting short pipe; a first interlocking mechanism disposed between the hard joint portion and the rotating mounting seat and used to retain the hard joint portion on the rotating mounting seat, the first interlocking mechanism having an operable first unlocking member; and The second interlocking mechanism is arranged between the hard joint part and the handle bar and is used to keep the hard joint part on the handle bar. The second interlocking mechanism has an operable second unlocking member.

2. The suction tube assembly according to claim 1, characterized in that: The second interlocking mechanism includes a second latch located at the handle rod and a second lock groove distributed on the hard joint part, and the second latch can be selectively moved between a locked position and an unlocked position. In the locked position, the second latch is placed in the second lock groove.

3. The suction tube assembly according to claim 2, characterized in that: The second latch is configured to move in a longitudinal direction between a locked position and an unlocked position.

4. The suction tube assembly according to claim 3, characterized in that: Also includes: The pull rod is movably arranged on the handle rod in the longitudinal direction, the second latch is fixed on the pull rod, and the second unlocking member is arranged in transmission with the pull rod.

5. The suction tube assembly according to claim 4, characterized in that: Also includes: The second resetting element is arranged between the pull rod and the handle rod.

6. The suction tube assembly according to claim 4, characterized in that: The handle bar comprises a handle for holding, and the second unlocking member is arranged at the handle.

7. The suction tube assembly according to claim 4, characterized in that: Also includes: A third interlocking mechanism is arranged between the handle rod and the fixed mounting seat and is used to fix the handle rod and the fixed mounting seat to each other to prevent the handle rod from rotating around the first pivot axis; the third interlocking mechanism includes a third latch located at the handle rod and a third locking groove distributed on the fixed mounting seat, the third latch can selectively move between a locked position and an unlocked position, in the locked position the third latch is inserted into the third locking groove, and the third latch is fixed to the pull rod.

8. The suction tube assembly according to claim 7, characterized in that: The distance that the third latch moves along the longitudinal direction between the locked position and the unlocked position is greater than or equal to the distance that the second latch moves along the longitudinal direction between the locked position and the unlocked position.

9. The suction tube assembly according to claim 1, characterized in that: The first interlocking mechanism includes a first latch and a first reset element located at the rotating mounting seat and a first lock groove distributed on the hard joint portion, the first latch can selectively move between a locked position and an unlocked position, in which the first latch is inserted into the first lock groove, and the first reset element is configured to keep the first latch in the locked position.

10. The suction tube assembly according to claim 1, characterized in that The rotating mounting seat and the connecting short pipe are integrally formed into a single component.

11. The suction tube assembly according to claim 1, characterized in that: The hard joint portion defines a grip portion for the user to grasp.

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