KR100213366B1 - Extension pipe for vacuum cleaner - Google Patents

Abstract

The present invention relates to an extension tube employed in a vacuum cleaner, and more particularly, it is very convenient in use because it can be easily performed without permission to increase or decrease the assembly length during cleaning work, and the manufacturing cost of the vacuum cleaner is reduced due to the small number of components. It relates to a vacuum tube lengthened extension tube greatly improved to save.

The present invention is provided with a fixing portion for mounting the suction brush to the front end, the hollow appearance having a fixed groove formed in the rear end, and a fixing protrusion coupled to the fixing groove formed on the inner side, the rear end of the appearance A hollow inner pipe which is inserted into the hollow fixed pipe, an inner circumferential surface of the fixed pipe, a fitting groove is formed at the distal end, and a hollow inner tube having a fixed portion to which the handle is mounted at the rear end thereof, and is fixed to the fitting groove; Providing a protrusion on the inner side, the front end of the inner tube is fitted to provide a length-controlled extension tube of the vacuum cleaner to continuously assemble the sealing tube inserted into the exterior.

Description

Adjustable length extension tube of vacuum cleaner

The present invention relates to an extension tube employed in a vacuum cleaner, and more particularly, to increase or decrease the assembly length during cleaning, which can be easily performed without permission, which is very convenient in use, and the manufacturing cost of the vacuum cleaner is reduced due to the small number of components. It relates to a vacuum tube lengthened extension tube greatly improved to save.

Generally, as shown in FIG. 1, the vacuum cleaner includes an auxiliary brush storage box, a dust indicator 115, and a cord winding button on an upper surface of the main body 110 in which a motor is built. Each of the wheels 121 is provided with a suction brush 125 that sucks dust and foreign substances from the cleaning surface by driving the motor in the main body 110, which is free to move, and the multistage extension pipe 127 and the flexible ( flexible) is configured by mounting a conduit 123 or the like on the front side of the main body 110.

The vacuum cleaner 100 applies external power to the motor built into the main body 110 to force the external air into the main body 110, thereby generating a strong suction force according to the increase in the internal vacuum degree. As the suction brush 125, the floor cleaning surface may be cleaned.

On the other hand, the multi-stage extension pipe 127 mounted between the suction brush 125 and the handle 122 connected to the flexible conduit 123 is composed of a plurality of pipe members, as shown in FIG. It is possible to be connected to each other in a multi-stage only during cleaning work, and separately stored separately when not in use, whereas the telescope type extension tube 130 shown in Figure 2a, b is an inner tube (131) and the appearance ( 32) When not in use, the assembly length is reduced as much as possible to facilitate storage by inserting the inner tube 131 of a predetermined length into the inner hole of the exterior 32, when pressing the button member 133 By pulling the inserted inner tube 131 outward, the assembly length can be appropriately added or subtracted according to the cleaning working conditions.

However, in order to vary the assembly length of the extension tube 130 according to the prior art as described above, the outer surface of the inner tube 131 is provided with a guide groove 135 recessed in the longitudinal direction, assembled according to the slide movement The inner circumferential surface of the exterior 132 to protrude to form a guide protrusion 136, as well as the pin (not shown) of the button member 132 when the length is adjusted to the inner tube 131 and the exterior 132 Since the engaging groove 134 for varying the overall assembly length of the step should be formed in the outer surface of the inner tube 131 with the guide groove 135 at a predetermined interval, the guide groove 135, the locking The internal structure of the inner and outer tubes 131 and 132 for forming the grooves 134 and the guide protrusions 136 becomes complicated, and the manufacturing cost of the vacuum cleaner 100 is increased by increasing the mold manufacturing cost. There was this.

In addition, in order to form the guide groove 135, the locking groove 134 and the guide protrusion 136 as described above, the material of the inner, outer 131, 132 must be made of a metal material, In addition to the weight of the extension tube 130, as well as the length of the extension tube 130 when adjusting the length of the user inevitably bend the waist in order to operate the button member 132 located in the lower, very in use There was an uncomfortable problem.

Therefore, the present invention has been made in order to solve the above problems, the object is to freely select the material of the inner and outer members, to simplify the mold structure of the inner tube and the exterior, and to reduce the number of components to manufacture the vacuum cleaner The unit cost can be reduced, and the assembly length can be changed freely without the operation of the button member. It is easy to use, and the sealing between the inner tube and the outer tube can prevent the suction power of the motor from leaking out to the outside. An object of the present invention is to provide an extension tube of a vacuum cleaner capable of improving cleaning efficiency.

1 is a perspective view of a general vacuum cleaner.

Figure 2a is an assembled state of the extension tube according to the prior art.

2b is a longitudinal cross-sectional view taken along the line A-A 'of FIG.

Figure 3 is a perspective view of the length adjustable extension tube of the vacuum cleaner according to the present invention.

Figure 4a is a cross-sectional view showing the appearance of the length adjustable extension tube of the vacuum cleaner according to the present invention.

Figure 4b is a sectional view showing a fixed pipe constituting the extension tube according to the present invention.

Figure 4c is a cross-sectional view showing the appearance constituting the extension tube according to the present invention.

Figure 4d is a cross-sectional view showing a sealing tube constituting the extension tube according to the present invention.

Figure 5 is a partial cross-sectional view showing the assembled state of the adjustable length extension tube of the vacuum cleaner according to the present invention.

Figure 6a is an operating state showing the free state of the adjustable length extension tube of the vacuum cleaner according to the present invention.

Figure 6b is an operating state showing the fixed state of the adjustable length extension tube of the vacuum cleaner according to the present invention.

* Explanation of symbols for main parts of the drawings

1: extension tube 10: appearance

11, 33: fixing part 12: fixing groove

20: fixed pipe 21: fixed protrusion

22: inner peripheral portion 23: protrusion rib

30: inner tube 31: fitting groove

32: outer peripheral portion 40: sealing pipe

41: sealing protrusion 42: fixed protrusion

122: handle 125: suction brush

The present invention for achieving the above object in the vacuum cleaner having a suction brush and a handle to move the suction brush to perform the cleaning work on the bottom surface as the suction force of the motor built into the main body, the suction brush to the front end A hollow outer pipe having a fixing unit to be mounted, a hollow outer tube having a fixing groove formed at a rear end thereof, a fixing protrusion coupled to the fixing groove at an inner side thereof, and a hollow fixing pipe into which the rear end of the outer tube is inserted; A hollow inner tube inserted into an inner circumferential surface of the fixing pipe, forming a fitting groove at the front end, a hollow inner tube having a fixing part for mounting the handle at a rear end thereof, and a fixing protrusion coupled to the fitting groove at an inner side thereof; Do not end the length adjustable extension tube of the vacuum cleaner, characterized in that the front end of the inner tube is inserted into the sealing tube inserted into the exterior continuously assembled As it depends.

Hereinafter, described in detail with reference to the accompanying drawings for the adjustable length extension tube of the vacuum cleaner according to the present invention.

Figure 3 is a perspective view showing the length adjustable extension tube of the vacuum cleaner according to the present invention, Figure 4 is a cross-sectional view showing the appearance, fixed pipe, inner tube and sealing tube constituting the length adjustable extension tube of the vacuum cleaner according to the present invention. 5 is an assembled cross-sectional view showing the assembled state of the adjustable length extension tube of the vacuum cleaner according to the present invention, Figure 6a is an operating state diagram showing the free state of the adjustable length extension tube of the vacuum cleaner according to the present invention, Figure 6b is an operating state diagram showing a fixed state of the adjustable length extension tube of the vacuum cleaner according to the present invention.

The adjustable length extension tube 1 of the vacuum cleaner according to the present invention is mounted between the suction brush and the handle so that the entire assembly length can be freely and easily adjusted without permission, and the extension tube is a suction brush assembled at the front end during cleaning. After fixing the inner tube assembled in the exterior to one side to loosen the fixed state, the assembly length can be easily increased or shortened.While the twisted inner tube is returned to its original state, the assembly length of the extension tube is firmly fixed until the end of the cleaning work. It is sustainable.

That is, as shown in FIGS. 3 and 4a, b, c, d, the suction brush 125 for cleaning the floor surface is equipped with a hollow exterior 10 having a predetermined length to the front end to the front end. Bar, the outer surface of the front end 10 is provided with a fixing portion 11 protruding outwardly so that the engaging port (125a) of the suction brush 125 can be fixed without rotation, fixed to the rear outer surface The groove 12 is formed and provided.

In addition, the fixing pipe 20 press-fits the rear end of the exterior 10 to the inner circumferential surface and is formed in a hollow like the exterior 10, and a fixing protrusion coupled to the fixing groove 12 of the exterior 10. Protrudes (21) on the inner circumferential surface. In addition, the fixed pipe 20 protrudes from the inner circumferential surface of the inner circumferential portion 22 formed to gradually increase as the pipe thickness T1 proceeds in the circumferential direction in the clockwise direction on the drawing. ) Is to be able to freely adjust the change in the length of the inner tube 30 in the outer surface 10 in close contact with the outer surface during the one-way rotation operation of the inner tube 30 to be described later.

In addition, the hollow inner tube 30 which is inserted into the fixing pipe 20 and fixed to the inner circumferential portion 22 formed on the inner circumferential surface thereof or is freely moved forward and backward when separated is fitted into the distal end portion 31. ) And a fixing portion 33 which can be assembled and fixed without rotation by inserting a coupling hole 122a of the handle 122 connected to the flexible conduit 123 mounted on the main body 110 to the rear end. Protruding. In addition, unlike the inner circumferential curved portion 22 formed on the inner circumferential surface of the fixed pipe 20, the outer circumferential surface of the inner tube 30 having a predetermined length is formed to gradually increase while advancing in the circumferential direction of the counterclockwise direction. As the outer circumferential curved portion 32 is protruded, the outer circumferential curved portion 32 of the inner tube 30 is rotated to the inner circumferential curved portion 22 of the fixed pipe 20 to be in close contact with each other at its boundary. The fixed pipe, the inner tube 20, 30, the inner, outer bent portion 22, 32 provided in the number of formation is preferably provided with at least one or more. In addition, the outer surface of the fixed pipe 20 is provided with a plurality of protruding ribs 23 protruding in the longitudinal direction to facilitate the mounting during assembly.

In addition, the hollow sealing pipe 40 is always coupled to the front end portion of the inner tube 30 is located in the inner space of the exterior 10 is fixed to the fitting groove 31 formed at the front end of the inner tube 30 Protrusions 42 are formed on the inner side, and the suction surface is introduced into the gap between the exterior 10 and the inner tube 30 to prevent the suction force is lost on the outer surface of the suction brush (125). In order to, assembling, it is provided with a plurality of ring-shaped sealing projection 41 integrally in close contact with the inner circumferential surface of the inner tube (30).

In order to mount the suction brush 125 on the tip of the extension tube 1 having the above-described configuration, and to perform the sweeping operation on the bottom sweeping surface, the inner tube 30 inserted in the exterior 10 is pulled outward. In order to increase the overall assembly length, as shown in FIG. 5 and FIG. 6A, the handle 122 fixed to the rear end of the inner tube 30 is positioned in the same horizontal direction as the long side of the suction brush 125. The inner circumferential portion 22 of the fixing pipe 20 fitted with the inner tube 30 and the outer circumferential portion 32 of the inner tube 30 are separated from each other so that the shankdong of the inner tube 30 is free. Therefore, the user can hold the handle 122 and raise the handle 122 upward in an upright state without having to bend the waist unnecessarily as in the prior art, and then turn it clockwise in the drawing in one direction.

In this case, while the front end of the exterior 10 is fixed to the coupler 125a of the suction brush 125, the inner tube 30 is fixed pipe 20 assembled to the rear end of the exterior 30 Since the inner tube 30 is rotatably inserted, the inner tube 30 can be rotated in the same clockwise direction as that of the handle 122. At this time, the inner circumferential surface 22 formed on the inner circumferential surface of the fixed pipe 20 and the outer circumferential curved portion 32 formed on the outer circumferential surface of the inner tube 30 in the clockwise direction are in close contact with each other by self-rotation, the boundary surface of which the inner and outer circumferential surfaces meet. As shown in FIG. 6B, the inner tube 30 having the handle 122 at the rear end thereof is positioned in the traveling direction perpendicular to the horizontal suction brush 125 as the friction force increases in the Can be fixed

In addition, the sealing tube 40 mounted on the inner surface of the outer tube 10 so that the fixing protrusion 42 is inserted into the fitting groove 31 of the distal end of the inner tube 30 so as to be able to move forward and backward is annular to the outer surface thereof. Since the sealing protrusion 41 formed in the shape is always in close contact with the inner circumferential surface of the exterior 10, the suction force flowing into the main body through the suction brush 125 is internal, external 10, and 30. It can be prevented from leaking out through the gap of).

On the other hand, after finishing the cleaning work, if you want to reduce the assembly length of the extension pipe 1 to store, as in the prior art, the user does not need to bend the waist unnecessarily to operate the button member 133, in the upright state The suction brush 125 is fixed to the bottom surface, and then the handle 122 which is twisted in the advancing direction as shown in FIGS. 5 and 6b is turned and turned in the counterclockwise direction opposite to the above. Since the frictional force is greatly reduced at the interface where the inner circumferential curved portion 22 of the 20 and the outer circumferential curved portion 32 of the inner tube 30 fall, the inner tube 30 equipped with the handle 122 at the rear end is lowered. When pressurized, the inner tube 30 is inserted into the inner hole of the outer shell 10 so that the assembly length of the extension tube 1 can be easily reduced.

In addition, since the inner circumferential curved portion 22 of the fixed pipe 20 is configured to have the thickest tube thickness T1 near the center of the quarter position of the circular cross section, the inner pipe 30 closely adheres to the inner tube 30 when the inner tube 30 rotates. The inner tube 30 that rotates by generating the largest friction force in the outer peripheral curved portion 32 to be firmly fixed in the same direction as the traveling direction of the suction brush 125.

Therefore, according to the length-adjustable extension tube of the vacuum cleaner according to the present invention, the suction pipe is provided with a fixed pipe in the rear end inner hole of the exterior to be mounted on the front end, the inner peripheral bent portion is formed on the outer surface thereof, and the outer peripheral curved portion is formed to be in close contact with it. In addition, a sealing tube is provided at the front end of the inner tube to which the handle is mounted at the rear end, and is assembled to the inner hole of the exterior, so that the inner hole of the exterior in an upright state is not required to bend the waist unnecessarily for the conventional button member operation. Rotating the inner tube mounted in one direction can freely extend or shorten the entire assembly length, thus improving the usability of the extension tube and reducing the number of components constituting the extension tube. As a result, an effect of reducing the manufacturing cost of the vacuum cleaner is obtained.

Claims (6)

In the vacuum cleaner having the suction brush 125 and the handle 122 to move the dust to the floor surface as the suction force of the motor built into the main body 110, the suction brush 125 is the tip end portion A hollow exterior 10 having a fixing portion 11 to be mounted on the rear surface, and having a fixing groove 12 formed at a rear end thereof, and a fixing protrusion 21 coupled to the fixing groove 12 on an inner surface thereof. And a hollow fixing pipe 20 into which the rear end of the exterior 10 is inserted, inserted into an inner circumferential surface of the fixed pipe 20, and forming a fitting groove 31 at the front end thereof, and the handle at the rear end thereof. A hollow inner tube 30 having a fixing portion 33 on which the 122 is mounted, and a fixing protrusion 42 coupled to the fitting groove 31 are formed on the inner side thereof, and the front end of the inner tube 30 is formed. The length of the vacuum cleaner, characterized in that the assembly is continuously assembled to the sealing pipe 30 is inserted into the outer appearance 10 Fasting tube. According to claim 1, The fixed pipe 20 is formed on the inner circumferential surface protruding the inner circumferential portion 22 formed to gradually increase while proceeding in the clockwise circumferential direction (T1), the inner tube 30 The extension length of the vacuum cleaner, characterized in that the outer circumferential surface of the tube thickness (T2) protruding to form a circumferential curved portion (32) formed to gradually increase while proceeding in the circumferential direction in the counterclockwise direction. According to claim 2, The inner, outer circumferential portion (22), 32 is adjustable length extension tube of the vacuum cleaner, characterized in that at least one is provided on the inner peripheral surface and the outer peripheral surface of the inner tube of the fixed pipe (20). 3. The outer circumferential portion 32 according to claim 2, wherein the inner circumferential portion 22 is configured to have the thickest tube thickness T1 at the central portion of the center of the circular section 1/4 of the fixed pipe 20. Length adjustable extension tube for vacuum cleaner, characterized in that it generates the greatest frictional force at. According to claim 1, The sealing tube 40 is in close contact with the inner peripheral surface of the inner tube 30 to prevent the suction force flows out between the gap of the outer tube 10 and the inner tube 30 during the cleaning operation Length-adjustable extension tube of the vacuum cleaner, characterized in that a plurality of annular sealing protrusions 41 are integrally provided on the outer surface. According to claim 1, wherein the fixed pipe (20) length-adjustable extension tube of the vacuum cleaner, characterized in that it is provided with a plurality of protruding ribs 23 protruding in the longitudinal direction to facilitate the mounting when assembled.

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