KR20010047820A - A sealing apparatus for telescopic extension pipes for a vacuum cleaner - Google Patents

Abstract

PURPOSE: An air tight instrument of an extended tube with many steps for a vacuum cleaner is provided to prevent that a sealing member of the O-ring form is separated from a packing member by aging according to long term using. CONSTITUTION: The air tight instrument of the extended tube with many steps for the vacuum cleaner includes a packing member(410), a groove(413), a sealing member(420), an installing portion(411) and a packing portion(412). The packing member(410) is installed being fixed with the internal wall face of the end of an inner side tube and has the cylinder type. The sealing member(420) with the ring type is inserted into the groove(413) along the outer circumference of the packing member(410). The installing portion(411) is inserted into the inner side tube and the packing portion is located on the outside of the end of the inner side tube and is close to the internal wall face of the external tube.

Description

A sealing apparatus for telescopic extension pipes for a vacuum cleaner}

The present invention relates to a sealing device for a vacuum cleaner multistage extension tube, and more particularly, to a sealing device for a vacuum cleaner multistage extension tube mounted on a connection portion of the multistage extension tube to prevent leakage of air.

In general, the vacuum cleaner is a household appliance that generates strong suction force in the cleaner body to forcibly suck the dust of the ground through the suction inlet to be cleaned, and is a mediator connecting the cleaner body and the suction inlet to a flexible hose and a multistage type. Use an extension tube.

On the other hand, the multi-stage extension tube is a two-stage or more metal tube is to be movable relative to each other and stretchable, this multi-stage extension tube is a long hollow outer tube 10 having a longitudinal axis, as shown in Figure 1, A hollow inner tube 20, which slides inwardly of the outer tube 10 and is capable of relative movement, and is fixedly mounted to an end of the outer tube 10 so that the inner tube 20 with respect to the outer tube 10 is fixed. It is provided with an extension device 30 for fixing and releasing.

In addition, one end portion of the inner tube 20 moving along the inner surface of the outer tube 10 is equipped with a sealing device 40 having a diameter substantially equal to the inner diameter of the outer tube 10, the inner tube during cleaning The air flowing along the 20 is prevented from leaking into the gap between the inner tube 20 and the outer tube 10.

Such a sealing device 40 is a hollow packing member such that the enlarged portion A of FIG. 1 and the separation view of FIG. (41) and a thin ring-shaped sealing material (42) made of rubber material which is attached to the groove (43) formed on the outer circumferential surface of the packing member (41) to be in contact with the inner wall surface of the outer tube (10).

At this time, the sealing material 42 is not inserted into the inner tube 20 is located at the end of the inner tube 20, while the one end of the packing member 41, that is, is not coupled to the inner tube (20) The end of the portion that is not formed is slightly larger so as to have a diameter substantially equal to the inner diameter of the outer tube 10, in contact with the inner wall surface of the outer tube 10 together with the sealing material (42).

Therefore, the sealing device 40 is to seal between the inner tube 20 and the outer tube 10 to the ends of the sealing member 42 and the packing member 41, so that the inner tube 20 Therefore, the flowing air does not leak.

However, in the conventional sealing device 40 as described above, since the sealing member 42 is formed in a thin ring shape, fatigue occurs due to repeated frictional contact with the outer tube 10, and when used for a long time When the sealing material 42 is aged and broken to operate the extension tube, the seal member 42 is separated from the packing member 41, and thus the extension tube is no longer operated or air leaks.

Accordingly, the present invention has been made in order to solve the above problems, the sealing device of the vacuum cleaner multi-stage extension tube is to be kept intact and prevent from being separated from the packing member even after repeated use or long-term use. The purpose is to provide.

Figure 1 is a sectional view of the main part of the multi-stage extension tube shown by cutting a portion of the extension tube to show the installation position of the general extension pipe joint sealing device, and an enlarged view

Figure 2 is a sectional view of the main part showing the conventional sealing device separated

Figure 3 is a corresponding view of the enlarged portion A of Figure 1, a front view showing a state in which the sealing device of the present invention is coupled to the inner tube and the outer tube

FIG. 4 is a corresponding view of FIG. 2, and a sectional view of the main part of the sealing apparatus of FIG.

Description of the main parts of the drawings

10-outer tube 20-inner tube

410-Packing member 411-Mounting part

412-Packing Part 413-Groove

420-Seals 421-Seals

422-protrusion

In order to achieve the above object, the present invention, the packing member is mounted on one end of the hollow inner tube that slides along the hollow outer tube in the longitudinal direction, and in the groove formed along the outer peripheral surface of the packing member It is made of an annular seal member which is inserted and mounted and is positioned directly outside the inner tube end portion when the packing member is installed in the inner tube and is in contact with the inner wall of the outer tube so that air flowing along the inner tube leaks between the outer tube. In the sealing device so as not to be, wherein the sealing member is a protrusion formed to protrude along the side of the sealing material having an outer diameter that matches the inner diameter of the inner tube so that the sealing member is inserted into the inner tube end when the packing member is mounted to the inner tube It provides a multi-stage extension tube closure device to be made.

At this time, the groove formed on the outer peripheral surface of the packing member is formed to have a width that matches the width of the sealing material.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 3 and 4, the sealing device according to the present invention, the hollow cylindrical packing member 410 is fitted to the inner wall surface of the end of the inner tube 20 and the packing member 410 It consists of a configuration including a ring-shaped sealing member 420 of rubber material to be inserted into the groove 413 formed along the outer peripheral surface of the.

Here, the packing member 410 is mounted to the mounting portion 411 is inserted into the inner tube 20, and is not inserted into the inner tube 20 is located just outside the end of the inner tube 20 one end portion The outer tube 10 is made of a packing portion 412 to be in contact with the inner wall surface.

In addition, when the packing member 410 is inserted and mounted in the inner tube 20, the sealing member 420 is supported by being caught by the protrusion 422 located in the inner tube 20 and the end of the inner tube 20. The protrusion 422 and the sealing part 421 formed to be stepped are formed integrally with each other so as to be positioned directly outside the end of the inner tube 20.

That is, the protrusion part 422 protrudes forward (to the left in the figure) along the side of the sealing part 421, and the outer diameter of the protrusion part 422 substantially coincides with the inner diameter of the inner tube 20. The sealant protrusion 422 is fitted into the inner tube 20 when it is inserted into the (20).

In addition, the sealing part 421 is formed to be stepped with the protrusion part 422 at the rear of the protrusion part 422, that is, the outer diameter of the sealing part 421 is substantially coincident with the inner diameter of the outer tube 10 so that the outer tube (10) It adheres to the inner wall surface.

On the other hand, the groove 413 formed along the outer circumferential surface of the packing member 410 is formed to have a width enough to be fitted with the sealing material 420.

Hereinafter will be described the assembly and operation of the closure device of the present invention configured as described above.

First, the sealing member 420 is fitted to the groove 413 formed on the outer circumferential surface of the packing member 410, the packing member 410 is inserted into one end of the inner tube 20 of the extension tube Let's do it.

At this time, as described above, the protrusion 422 of the sealing material 420 is located in the inner tube 20 together with the mounting portion 411 of the packing member 410, the sealing portion 421 of the sealing material 420 The inner tube 20 is positioned outside the inner tube 20 together with the packing portion 412 of the packing member 410 in a state supported by the end.

Subsequently, the inner tube 20 is assembled by pushing the inner tube 20 into the outer tube 10 while the packing member 410 is assembled to the inner tube 20 as described above.

The inner tube 20 and the outer tube 10 assembled as described above are moved relative to each other, and at this time, the packing part 412 end of the packing member 410 and the sealing part 421 of the sealing material 420. Is in close contact with the inner wall surface of the outer tube 10 to move along this inner wall surface to maintain the airtight.

At this time, since the protrusion 422 integrated with the sealing part 421 of the sealing material 420 is fixed to the inner wall surface of the inner tube 20, the sealing part 421 may be damaged even if used repeatedly for a long time. It is difficult, and even if broken, since the protrusion 422 is fixed to the inner tube 20, the phenomenon that the entire sealant 420 is separated from the packing member 410 is eliminated.

As described above, according to the present invention, there is no phenomenon that the sealing material is separated from the packing member due to long-term use and aging, and thus, even when used for a long period of time, there is no abnormality in the operation of the extension tube and it is possible to always maintain airtightness.

Claims (2)

A packing member mounted at one end of the hollow inner tube sliding along the outer tube of the hollow, and inserted into a groove formed along the outer circumferential surface of the packing member and the inner tube end when the packing member is installed in the inner tube In the sealing device is formed of a ring-shaped sealing material which is located just outside the end of the inner tube to be in contact with the inner wall surface of the outer tube, the air flowing along the inner tube does not leak between the inner tube and the outer tube, The sealing member, when the packing member is mounted to the inner tube end, characterized in that it comprises a projection formed to protrude along the side of the sealing material having an outer diameter that matches the inner diameter of the inner tube so as to be located in the inner tube Sealing device for multistage extension tube for vacuum cleaner. The method of claim 1, wherein the groove formed in the outer peripheral surface of the packing member is a sealing device of a multistage extension tube for a vacuum cleaner, characterized in that it is formed to have a width corresponding to the width of the sealing material.