Extension pipe for dust collector

Abstract

The utility model relates to the technical field of dust collector accessories, in particular to an extension tube for a dust collector, which comprises an adjusting inner tube and an adjusting outer tube, the adjusting inner tube is slidably inserted in the adjusting outer tube along the axial direction of the adjusting outer tube, and one end of the adjusting outer tube is provided with a fixing ring sleeve. An adjusting mechanism used for locking or unlocking the adjusting outer pipe and the adjusting inner pipe is jointly arranged on the fixing ring sleeve and the adjusting inner pipe, the adjusting mechanism comprises a clamping and locking assembly and a pressing assembly, the clamping and locking assembly is used for clamping and locking the adjusting outer pipe and the adjusting inner pipe, and the pressing assembly is used for pressing the adjusting outer pipe and the adjusting inner pipe. The pressing assembly acts on the clamping and locking assembly and is used for unlocking the adjusting outer pipe and the adjusting inner pipe which are in the locking state. The use convenience of the locking structure on the extension pipe is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum cleaner accessories, and in particular to an extension tube for a vacuum cleaner. Background Art

[0002] The extension tube is a commonly used accessory for vacuum cleaners. In order to make the vacuum cleaners have good adaptability and user experience, the extension tubes of existing vacuum cleaners basically adopt a telescopic structure, that is, the inner tube is inserted into the outer tube, and the outer tube and the inner tube are locked and fixed with the help of a locking structure provided on the outer tube. When the length of the extension tube needs to be adjusted, just press the locking structure on the outer tube, pull the inner tube in the outer tube according to the use requirements, and then release the locking structure to lock and fix the outer tube and the inner tube again, so as to adjust the length of the extension tube to the required length.

[0003] The locking structure on the existing extension tube usually includes a fixed sleeve, a button, a rotating piece, a spring, a contact rod and a lock buckle. The fixed sleeve is fixedly installed on the outer tube, and an installation opening is provided on the fixed sleeve. The button is movably connected in the installation opening. The rotating piece is rotatably installed inside the installation opening. The middle position of the rotating piece is rotatably connected to the fixed sleeve. Both ends of the rotating piece in the length direction are free ends. The spring is fixedly connected to a free end of the rotating piece. The end of the spring away from the rotating piece is fixedly connected to the button. The contact rod is fixedly connected to the button and is used to contact the free end of the rotating piece away from the spring. The lock buckle is fixedly installed on the side of the rotating piece away from the spring. The inner tube is provided with a plurality of lock holes arranged at intervals along its length direction. When the locking structure on the existing extension tube is in use, the elastic force of the spring itself is used to rotate the rotating plate, so that the lock buckle is connected to the inside of the lock hole, so that the inner tube and the outer tube of the extension tube are in a locked and fixed state. When the length of the extension tube needs to be adjusted, the button is pressed so that the abutment rod abuts against a free end of the rotating plate, thereby rotating the rotating plate and compressing the spring, so that the lock buckle can be disengaged from the lock hole, thereby adjusting the length of the extension tube.

[0004] However, during use of the existing locking structure, it is necessary to continuously adjust the relative positions of the inner tube and the outer tube while pressing the button until the position of the lock buckle coincides with the lock hole, and then the inner tube and the outer tube can be locked and fixed again, which makes the use of the locking structure more cumbersome and easily affects the convenience of using the locking structure on the extension tube. Utility Model Content

[0005] In order to improve the convenience of using a locking structure on an extension tube, the present application provides an extension tube for a vacuum cleaner.

[0006] The present application provides an extension tube for a vacuum cleaner, which adopts the following technical solution:

[0007] An extension tube for a vacuum cleaner comprises an adjustable inner tube and an adjustable outer tube, wherein the adjustable inner tube is inserted into the adjustable outer tube by sliding along the axial direction of the adjustable outer tube, a fixing ring sleeve is provided at one end of the adjustable outer tube, and an adjusting mechanism for locking or unlocking the adjustable outer tube and the adjustable inner tube is provided on the fixing ring sleeve and the adjustable inner tube, wherein the adjusting mechanism comprises a locking assembly and a pressing assembly, wherein the locking assembly is used to lock the adjustable outer tube and the adjustable inner tube by locking, and the pressing assembly acts on the locking assembly and is used to unlock the adjustable outer tube and the adjustable inner tube in a locked state.

[0008] By adopting the above technical solution, the locking assembly is used to help lock the adjustable outer tube and the adjustable inner tube, and the pressing assembly is used to help unlock the locked state between the adjustable outer tube and the adjustable inner tube. The coordinated use of the locking assembly and the pressing assembly helps to lock and unlock the extension tube through a simple pressing operation, which is easy to operate, thereby helping to improve the locking effect of the extension tube, and further helping to increase the reliability of the extension tube during use.

[0009] In a specific feasible implementation scheme, the locking assembly includes a mounting cylinder, a connecting spring, a movable locking tooth and a fixed locking tooth, the fixed locking tooth being arranged on the outer wall of the adjusting inner tube and along the axial direction of the adjusting inner tube, the interior of the fixing ring sleeve is hollow, the mounting cylinder is movably arranged inside the fixing ring sleeve, one end of the connecting spring is connected to the inner wall of the mounting cylinder, and the other end is connected to the fixing ring sleeve, the movable locking tooth is arranged on the inner wall of the mounting cylinder and along the axial direction of the mounting cylinder, the inner wall of the fixing ring sleeve is provided with a make way opening for the movable locking tooth to pass through, and the movable locking tooth is meshed with the fixed locking tooth.

[0010] By adopting the above technical solution, the elastic force of the connecting spring on the mounting cylinder is utilized to help engage the movable locking teeth with the fixed locking teeth, thereby helping to lock the adjustable outer tube and the adjustable inner tube, helping to improve the locking effect of the extension tube, and further helping to increase the reliability of the extension tube during use.

[0011] In a specific possible implementation scheme, the pressing assembly includes a mounting seat, a button, a return spring and a pressure piece, the mounting seat is embedded in the fixed ring sleeve, the button is movably arranged in the mounting seat, the return spring is arranged between the mounting seat and the button, and one end of the return spring is connected to the mounting seat, and the other end is connected to the button, and the pressure piece is connected to the button and is used to press the mounting cylinder.

[0012] By adopting the above technical solution, the operator can drive the pressing member to press the installation cylinder by pressing the button, thereby causing the installation sleeve to displace, and then drive the movable locking tooth and the fixed locking tooth to move away from each other, which helps to unlock the adjustment outer tube and the adjustment inner tube that are in a locked state.

[0013] In a specific possible implementation scheme, the pressing member includes a connecting portion and a pressing portion, one end of the connecting portion is connected to the button, and the mounting seat is provided with a through hole for the connecting portion to pass through, the pressing portion is connected to one end of the connecting portion away from the button and is located inside the fixed ring sleeve, and the pressing portion is arranged in an arc shape and fits the shape of the outer wall of the mounting cylinder.

[0014] By adopting the above technical solution, the arc-shaped pressing portion helps to improve the fit between the pressing portion and the surface of the mounting cylinder, thereby helping to improve the stability of the pressing portion pressing the mounting cylinder, and further helping to improve the stability and reliability during the unlocking process.

[0015] In a specific possible implementation mode, a guide slot is provided on the inner wall of the mounting seat, a guide slider is provided on the side wall of the button, and the guide slider is slidably engaged in the guide slot.

[0016] By adopting the above technical solution, when the button moves in the mounting base, the guide slider can slide along the guide groove, which helps to limit the movement trajectory of the button, thereby preventing the button from shifting or tilting, and improving the stability and accuracy of the button movement in the mounting base.

[0017] In a specific possible implementation, a track groove is provided on the adjusting inner tube, and the track groove is arranged along the axial direction of the adjusting inner tube. A guide plate is provided on the inner wall of the fixing ring sleeve, and the guide plate is slidably inserted in the track groove.

[0018] By adopting the above technical solution, when the adjusting inner tube and the adjusting outer tube produce relative sliding, the guide plate can slide along the track groove, thereby helping to improve the stability and smoothness of the relative sliding of the adjusting inner tube and the adjusting outer tube, helping to reduce the probability of the adjusting inner tube and the adjusting outer tube getting stuck or offset during the relative sliding process, and further enhancing the stability and reliability of the extension tube lock during use.

[0019] In a specific feasible implementation scheme, the inner diameter of the fixing ring sleeve is smaller than the inner diameter of the adjusting outer tube, a limiting ring is provided at one end of the adjusting inner tube inserted into the adjusting outer tube, the limiting ring is provided along the circumferential periphery of the adjusting inner tube, the circumferential outer wall of the limiting ring is in sliding contact with the inner wall of the adjusting outer tube, and the fixing ring sleeve can prevent the limiting ring from falling out of the adjusting outer tube.

[0020] By adopting the above technical solution, the limiting ring and the fixing ring sleeve are used to help prevent the end of the adjusting inner tube inserted into the adjusting outer tube from escaping from the adjusting outer tube, which helps to enhance the reliability of the extension tube during use.

[0021] In a specific possible implementation mode, a mounting groove is provided on the circumferential outer wall of the limiting ring, a sealing ring is arranged in the mounting groove, and the sealing ring is interference fit with the inner wall of the adjusting outer tube.

[0022] By adopting the above technical solution, the use of the sealing ring helps to improve the sealing effect of the extension tube, thereby helping to improve the use effect of the extension tube.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The present application provides a locking component and a pressing component, and utilizes the locking component and the pressing component in combination to help achieve locking and unlocking of the extension tube through a simple pressing operation, which is convenient to operate and helps to improve the locking effect of the extension tube, thereby helping to increase the reliability of the extension tube during use.

[0025] 2. The present application provides a guide plate and a track groove, so that the guide plate can slide along the track groove, thereby helping to improve the stability and smoothness of the relative sliding of the adjusting inner tube and the adjusting outer tube, thereby helping to reduce the probability of the adjusting inner tube and the adjusting outer tube getting stuck or offset during the relative sliding process, and further enhancing the stability and reliability of the extension tube lock during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a partial structural cross-sectional view of an embodiment of the present application.

[0028] Figure 3 It is an exploded view showing the specific structure of the locking assembly.

[0029] Figure 4 It is a partial structural cross-sectional view that reflects the specific structure of the pressing component.

[0030] Figure 5 yes Figure 2 Enlarged view of point A in the middle.

[0031] Explanation of the accompanying drawings: 1. Adjust the inner tube; 2. Adjust the outer tube; 3. Fix the ring sleeve; 4. Lock assembly; 41. Install the cylinder; 42. Connecting spring; 43. Movable locking tooth; 44. Fixed locking tooth; 5. Press assembly; 51. Mounting seat; 52. Button; 53. Reset spring; 54. Pressing piece; 541. Connecting part; 542. Pressing part; 6. Make way opening; 7. Perforation; 8. Guide slide groove; 9. Guide slider; 10. Track groove; 11. Guide plate; 12. Limiting ring; 13. Installing groove; 14. Sealing ring; 15. First elastic telescopic rod; 16. Second elastic telescopic rod. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings.

[0033] The present application embodiment discloses an extension tube for a vacuum cleaner, referring to Figure 1 and Figure 2 , including an adjustable outer tube 2 and an adjustable inner tube 1, one end of the adjustable inner tube 1 is inserted into the inner part of the adjustable outer tube 2 by sliding along the axial direction of the adjustable outer tube 2, and a fixed ring sleeve 3 is fixedly installed at one end of the adjustable outer tube 2 close to the adjustable inner tube 1, and the inner diameter of the fixed ring sleeve 3 is smaller than the inner diameter of the adjustable outer tube 2. The fixed ring sleeve 3 is hollow inside, and an adjusting mechanism is provided on the fixed ring sleeve 3 and the adjustable inner tube 1.

[0034] Reference Figure 2 and Figure 3 The adjusting mechanism includes a locking assembly 4, which includes a mounting cylinder 41, a movable locking tooth 43, a fixed locking tooth 44 and a plurality of connecting springs 42. The fixed locking tooth 44 is integrally formed on the outer wall of the adjusting inner tube 1 along the axial direction of the adjusting inner tube 1. The plurality of connecting springs 42 are fixedly mounted inside the fixing ring sleeve 3 and are arranged in a ring shape. The mounting cylinder 41 is movably placed inside the fixing ring sleeve 3 and the circumferential inner wall of the mounting cylinder 41 is fixedly connected to the plurality of connecting springs 42. The movable locking tooth 43 is fixedly mounted on the inner wall of the mounting cylinder 41 along the axial direction of the mounting cylinder 41. A clearance opening 6 is provided on the fixing ring sleeve 3. The movable locking tooth 43 passes through the clearance opening 6 and meshes with the fixed locking tooth 44.

[0035] Reference Figure 2 and Figure 3 During the use of the extension tube, the mounting cylinder 41 maintains a stable position under the elastic action of multiple connecting springs 42, so that the movable locking teeth 43 are engaged with the fixed locking teeth 44, thereby helping to lock the adjustment outer tube 2 and the adjustment inner tube 1, helping to improve the locking effect of the extension tube, and further helping to increase the reliability of the extension tube during use.

[0036] Reference Figure 3 and Figure 4The adjusting mechanism further comprises a pressing assembly 5, which comprises a mounting seat 51, a button 52, a pressing member 54 and a plurality of return springs 53. The mounting seat 51 is fixedly embedded in the fixed ring sleeve 3, and the button 52 is movably mounted in the mounting seat 51. A guide slider 9 is integrally formed on the side wall of the button 52, and a guide slot 8 is provided on the inner wall of the mounting seat 51. The guide slider 9 is slidably engaged in the guide slot 8. The return spring 53 is located between the mounting seat 51 and the button 52, and one end of the return spring 53 is fixedly connected to the mounting seat 51, and the other end is fixedly connected to the button 52. In this embodiment, the pressing member 54 comprises a connecting portion 541 and a pressing portion 542. A through hole 7 is provided on the mounting seat 51, and the connecting portion 541 penetrates the through hole 7. One end of the connecting portion 541 is fixedly connected to the button 52, and the other end is fixedly connected to the pressing portion 542. The pressing portion 542 is located inside the fixed ring sleeve 3 and is arranged in an arc shape.

[0037] Reference Figure 3 and Figure 4 When adjusting the length of the extension tube, the operator presses the button 52 to move the button 52 in the mounting seat 51, thereby driving the arc-shaped pressing portion 542 to fit the surface of the mounting cylinder 41 and press the mounting cylinder 41, so that the mounting cylinder 41 and the movable locking teeth 43 move synchronously, thereby making the movable locking teeth 43 and the fixed locking teeth 44 move away from each other, which helps to unlock the adjustment outer tube 2 and the adjustment inner tube 1 in the locked state. When the button 52 moves in the mounting seat 51, the guide slider 9 slides along the guide slide groove 8, which helps to limit the movement trajectory of the button 52, thereby preventing the button 52 from deflecting or tilting, improving the stability and accuracy of the button 52 in the mounting seat 51, and thus improving the accuracy of the movement direction of the mounting cylinder 41 and the movable locking teeth 43.

[0038] Reference Figure 3 and Figure 4 A first elastic telescopic rod 15 is fixedly connected to the outer wall of the mounting cylinder 41, and one end of the first elastic telescopic rod 15 away from the mounting cylinder 41 is fixedly connected to the inner wall of the fixing ring sleeve 3; a second elastic telescopic rod 16 is fixedly connected to the inner wall of the mounting cylinder 41, and one end of the second elastic telescopic rod 16 away from the mounting cylinder 41 is fixedly connected to the inner wall of the fixing ring sleeve 3; the central axes of the first elastic telescopic rod 15 and the second elastic telescopic rod 16 are located on the same straight line, and the length direction of the first elastic telescopic rod 15 and the second elastic telescopic rod 16 is the same as the moving direction of the button 52 in the mounting seat 51.

[0039] Reference Figure 3 During the movement of the installation cylinder 41, the first elastic telescopic rod 15 and the second telescopic rod help to guide the moving direction of the installation cylinder 41, thereby further improving the accuracy of the moving direction of the installation cylinder 41 and the movable locking tooth 43.

[0040] Reference Figure 2 and Figure 3 A track groove 10 is provided on the outer wall of the adjusting inner tube 1 in the axial direction, and a guide plate 11 is fixedly installed on the inner wall of the fixing ring sleeve 3, and the guide plate 11 is slidably inserted in the track groove 10. When the adjusting inner tube 1 and the adjusting outer tube 2 slide relative to each other, the guide plate 11 slides along the track groove 10, thereby helping to improve the stability and smoothness of the relative sliding of the adjusting inner tube 1 and the adjusting outer tube 2, thereby helping to reduce the probability of the adjusting inner tube 1 and the adjusting outer tube 2 being stuck or offset during the relative sliding process, and further enhancing the stability and reliability of the extension tube lock during use.

[0041] Reference Figure 2 and Figure 5 A limit ring 12 is fixedly installed on the circumferential outer wall of one end of the adjusting inner tube 1 inserted into the adjusting outer tube 2, and the circumferential outer wall of the limit ring 12 slides against the inner wall of the adjusting outer tube 2. A circle of mounting grooves 13 are provided on the circumferential outer wall of the limit ring 12, and a sealing ring 14 is fixedly placed inside the mounting groove 13, and the sealing ring 14 is interference fit with the circumferential inner wall of the adjusting outer tube 2.

[0042] Reference Figure 2 and Figure 5 When the adjusting inner tube 1 and the adjusting outer tube 2 slide relative to each other, the fixing ring 3 can limit the limiting ring 12, thereby preventing the limiting ring 12 from escaping from the adjusting outer tube 2, and further preventing the adjusting inner tube 1 from escaping from the adjusting outer tube 2, which helps to enhance the reliability of the extension tube during use. The sealing ring 14 helps to improve the sealing effect of the extension tube during use, thereby helping to improve the use effect of the extension tube.

[0043] The implementation principle of the embodiment of the present application is: during the use of the extension tube, the installation cylinder 41 maintains a stable position under the elastic action of multiple connecting springs 42, so that the movable locking teeth 43 are engaged with the fixed locking teeth 44, thereby helping to lock the adjustment outer tube 2 and the adjustment inner tube 1, helping to improve the locking effect of the extension tube, and further helping to increase the reliability of the extension tube during use.

[0044] When adjusting the length of the extension tube, the operator presses the button 52 to move the button 52 in the mounting seat 51, thereby driving the arc-shaped pressing portion 542 to fit the surface of the mounting cylinder 41 and press the mounting cylinder 41, so that the mounting cylinder 41 and the movable locking tooth 43 move synchronously, and then the movable locking tooth 43 and the fixed locking tooth 44 move away from each other, which helps to unlock the adjustment outer tube 2 and the adjustment inner tube 1 in a locked state.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An extension tube for a vacuum cleaner, characterized in that: The invention comprises an adjusting inner tube (1) and an adjusting outer tube (2), wherein the adjusting inner tube (1) is inserted into the adjusting outer tube (2) by sliding along the axial direction of the adjusting outer tube (2), and a fixing ring sleeve (3) is provided at one end of the adjusting outer tube (2). The fixing ring sleeve (3) and the adjusting inner tube (1) are jointly provided with an adjusting mechanism for locking or unlocking the adjusting outer tube (2) and the adjusting inner tube (1), and the adjusting mechanism comprises a locking assembly (4) and a pressing assembly (5), wherein the locking assembly (4) is used to lock the adjusting outer tube (2) and the adjusting inner tube (1) by locking, and the pressing assembly (5) acts on the locking assembly (4) and is used to unlock the adjusting outer tube (2) and the adjusting inner tube (1) in a locked state.

2. The extension tube for a vacuum cleaner according to claim 1, characterized in that: The locking assembly (4) comprises a mounting cylinder (41), a connecting spring (42), a movable locking tooth (43) and a fixed locking tooth (44); the fixed locking tooth (44) is arranged on the outer wall of the adjusting inner tube (1) and along the axial direction of the adjusting inner tube (1); the interior of the fixing ring sleeve (3) is hollow; the mounting cylinder (41) is movably arranged inside the fixing ring sleeve (3); one end of the connecting spring (42) is connected to the inner wall of the mounting cylinder (41), and the other end is connected to the fixing ring sleeve (3); the movable locking tooth (43) is arranged on the inner wall of the mounting cylinder (41) and along the axial direction of the mounting cylinder (41); a clearance opening (6) for the movable locking tooth (43) to pass through is arranged on the inner wall of the fixing ring sleeve (3); the movable locking tooth (43) is meshed with the fixed locking tooth (44).

3. The extension tube for a vacuum cleaner according to claim 2, characterized in that: The pressing assembly (5) comprises a mounting seat (51), a button (52), a return spring (53) and a pressing piece (54); the mounting seat (51) is embedded in the fixing ring sleeve (3); the button (52) is movably arranged in the mounting seat (51); the return spring (53) is arranged between the mounting seat (51) and the button (52); one end of the return spring (53) is connected to the mounting seat (51) and the other end is connected to the button (52); the pressing piece (54) is connected to the button (52) and is used to press the mounting cylinder (41).

4. The extension tube for a vacuum cleaner according to claim 3, characterized in that: The pressing member (54) comprises a connecting portion (541) and a pressing portion (542); one end of the connecting portion (541) is connected to the button (52); a through hole (7) for the connecting portion (541) to pass through is provided on the mounting seat (51); the pressing portion (542) is connected to an end of the connecting portion (541) away from the button (52) and is located inside the fixing ring sleeve (3); the pressing portion (542) is arranged in an arc shape and fits the shape of the outer wall of the mounting cylinder (41).

5. The extension tube for a vacuum cleaner according to claim 3, characterized in that: A guide slot (8) is provided on the inner wall of the mounting seat (51), a guide slider (9) is provided on the side wall of the button (52), and the guide slider (9) is slidably engaged in the guide slot (8).

6. The extension tube for a vacuum cleaner according to claim 1, characterized in that: The adjusting inner tube (1) is provided with a track groove (10), and the track groove (10) is arranged along the axial direction of the adjusting inner tube (1). A guide plate (11) is arranged on the inner wall of the fixing ring sleeve (3), and the guide plate (11) is slidably inserted in the track groove (10).

7. The extension tube for a vacuum cleaner according to claim 1, characterized in that: The inner diameter of the fixed ring sleeve (3) is smaller than the inner diameter of the adjusting outer tube (2); a limiting ring (12) is provided at one end of the adjusting inner tube (1) inserted into the adjusting outer tube (2); the limiting ring (12) is provided along the circumferential periphery of the adjusting inner tube (1); the circumferential outer wall of the limiting ring (12) is in sliding contact with the inner wall of the adjusting outer tube (2); and the fixed ring sleeve (3) can prevent the limiting ring (12) from escaping from the adjusting outer tube (2).

8. The extension tube for a vacuum cleaner according to claim 7, characterized in that: A mounting groove (13) is provided on the circumferential outer wall of the limiting ring (12), a sealing ring (14) is arranged in the mounting groove (13), and the sealing ring (14) is interference-fitted with the inner wall of the regulating outer tube (2).

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