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Expansion pipe for dust collector

A technology for vacuum cleaners and telescopic tubes is applied in the field of telescopic tubes for vacuum cleaners, which can solve the problems of changing locking force, unstable locking force, etc., and achieve the effects of reduced material usage, low cost, and omission of tube sleeves.

Inactive Publication Date: 2009-09-16
徐为尔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the locking force of the locking element comes from the manipulation sleeve, and because the manipulation sleeve is a plastic part that is easily deformed, the locking force is unstable. In actual operation, displacement will occur between the manipulation sleeve and the locking element, resulting in Changes in locking force, etc.

Method used

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  • Expansion pipe for dust collector
  • Expansion pipe for dust collector
  • Expansion pipe for dust collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as Figure 1~2 Shown is a telescopic tube for a vacuum cleaner, the telescopic tube includes an outer tube 2, an inner tube 9, at least one movable locking element 5, and an anti-rotation mechanism.

[0050] The inner tube 9 is inserted into the lumen of the outer tube 2 . Such as Figure 4~5 The inner tube 9 shown has a locking strip 15 with a plurality of locking grooves 16 distributed along the axial direction on its outer surface.

[0051] There is only one locking element 5 in the drawings. When the locking element 5 moves between the outer tube 2 and the inner tube 9, the inner tube 9 has two states of unlocking and locking relative to the outer tube 2. When the inner tube 9 is in the unlocked state , the locking element 5 is located outside the locking groove 16 or is in a free state. When the inner tube 9 is in the locked state, the locking element 5 is inserted into one of the locking grooves 16 .

[0052] Such as image 3 As shown, three positioning b...

Embodiment 2

[0059] The embodiment of embodiment 2 is shown in embodiment 1, and its difference from embodiment 1 is that the insertion space 19 is formed between the outer tube 2 and the elastic element 5, such as Figures 11 to 13 As shown, when the unlocking member 12 is axially slid left or right, and one of the unlocking slopes 14 gradually pushes into a corresponding insertion space 19, the locking element 5 enters a free state, and moves the outer surface at will. Tube 2 or inner tube 9, locking element 5 can break away from locking groove 16, and outer tube 2 and inner tube 9 are unlocked from locked state; Hold the locking element 5, once the position of the locking element 5 is opposite to a locking groove 16 on the locking bar 15, the locking element 5 will be pressed into the locking groove 16 by the elastic element 7, and the outer tube 2 and the inner tube 9 are relatively locked.

Embodiment 3

[0061] Embodiment 3 is also roughly the same as embodiment 1, as Figures 14 to 17 As shown, the difference from Embodiment 1 is that the elastic element 7 is a wire or leaf spring and extends along the axial direction, and the wire or leaf spring presses the locking element 5 to the inner tube 9; unlocking The member 12 is arranged to be rotatable along the circumferential direction, and the unlocking inclined surface 14 extends along the circumferential direction and gradually inclines. Such as Figure 18-20 As shown, an insertion space 19 is formed between the locking element 5 and the outer surface of the outer tube 2, and the outer tube 2 is provided with an unlocking member 12 that can rotate in the circumferential direction, and the unlocking member 12 is provided with two opposite unlocking slopes 14. When the unlocking slope 14 is pushed into the insertion space 19 gradually, the locking element 5 will also gradually break away from the lock groove 16, and the outer ...

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PUM

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Abstract

The invention relates to a telescoping tube for a vacuum cleaner, which includes inner and outer tubes sheathed on each other; a locking bar with a plurality of locking grooves distributed along the axial direction is arranged on the outer surface of the inner tube; at least one movable locking element; The anti-rotation mechanism, the locking element is pressed with an elastic element, and the elastic element presses the locking element into the locking groove on the inner tube, and an insertion space is formed between the elastic element or a part of the locking element and the outer surface of the outer tube , the outer tube is provided with a movable unlocking part, the unlocking part is provided with at least one unlocking slope; in the process of moving (axially sliding or rotating) the unlocking part, the unlocking slope on the unlocking part is gradually inserted by the locking element or The insertion space between the elastic element and the outer wall of the outer tube, so that the locking element will leave the lock groove or be in a free state (when the elastic element is jacked up, there is no part pressing on the locking element), and the inner tube will be unlocked. The invented telescopic tube is convenient and quick to unlock, and can save materials.

Description

technical field [0001] The invention relates to a telescopic tube for a vacuum cleaner. Background technique [0002] Telescopic tubes for vacuum cleaners are very popular now and are a mature product. Most of these telescopic tubes are composed of an outer tube and an inner tube, and there is a control mechanism between the two, which is composed of a tube sleeve, an operating sleeve, a return spring, a locking element, etc . The disadvantage is that the locking force of the locking element comes from the manipulation sleeve, and because the manipulation sleeve is a plastic part that is easily deformed, the locking force is unstable. In actual operation, displacement will occur between the manipulation sleeve and the locking element, resulting in Changes in locking force etc. Contents of the invention [0003] The object of the present invention is to provide a telescoping tube for a vacuum cleaner, which can be easily unlocked by moving the unlocking slope on the unlo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A47L9/24
Inventor 徐为尔
Owner 徐为尔