JP2999176B2 - Extension tube for vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner for cleaning by a suction force of a driving means, and more particularly, to a case where a place to be cleaned is a short distance from a user of the vacuum cleaner when performing indoor cleaning. The present invention relates to an extension pipe for a vacuum cleaner whose length is appropriately adjusted for use regardless of a long distance.

[0002]

2. Description of the Related Art In general, a vacuum cleaner has a main body 1 in which a suction motor and a dust collecting pack are provided and a power supply means for supplying power to the inside is provided, and dust is sucked into the dust collecting pack of the main body 1. To guide the flow of air containing garbage,
A handle member 3 in which an electric wire connected to the power supply means is disposed, and a connecting portion 4 connected to the electric wire is formed at an end portion.
A suction hose 2 having one end connected to the suction hose 2;
A power brush (not shown) that is rotated by a drive motor and scatters the dust is disposed inside so that the dust in the room can be smoothly sucked through the third lead wire 6.
Is provided at one end thereof, and the air containing dust and foreign substances is passed through the suction port body 5 so that the air containing dust and foreign substances flows to the suction hose 2 side. An extension pipe 10 is provided between the suction port body 5 and the handle member 3 for guiding the flow.

Here, as shown in FIGS. 1 and 2, the extension pipe 10 is connected to one end of the handle member 3 to form a first connection member 11 having a first housing portion 12 formed therein. It comprises a second connecting member 15 connected between the first connecting member 11 and the suction port body 5 and having a second housing portion 16 formed therein.

Further, a first lead wire 13 connected to the connection portion 4 of the handle member 3 is provided on one side of the first housing portion 12, and the second connection member is provided on the other side. Fifteen
The first connection member 14 electrically connected to the second lead wire 17 disposed on one side of the first connection member 14 is provided.

Further, between the first lead wire 13 and the first connecting member 11, the first lead wire 13 and the first connecting member 11 are electrically connected. The wires are connected.

Further, the other side of the second accommodating portion 16 is electrically connected to the third lead wire 6 of the suction port body 5 and electrically connected to the second lead wire 17 by an electric wire. A second connection member 18 to be connected is provided.

[0007] According to the conventional vacuum cleaner constructed as described above, the length of the extension tube 10 cannot be changed when performing indoor cleaning. In the case of a short distance or a long distance from the user, the user can perform cleaning only in a state where the suction unit 5 is kept at the same distance from the handle member 3 by the connecting means 10 without using another hand. Had the disadvantage that it was easier to get tired faster.

Therefore, in order to solve the above problems, FIGS. 3 to 5 show other embodiments of the extension pipe. 1 and 2 are denoted by the same names and reference numerals, and detailed description thereof will be omitted.

The other end of the connecting portion 4 of the handle member 3 connected to the suction hose 2 and the suction port body 5 suck air containing dust into the suction hose 2 when cleaning the room. In addition, an extension pipe 100 composed of a first extension means 110 and a second extension means 120 adapted to be able to supply power while varying the length in a telescopic manner as well as to connect the suction hose 2 to an electric wire. Connected through.

The suction port body 5 includes a third lead wire 6.
Is provided at one end, and a power brush (not shown) that is rotated by a drive motor and scatters dust is provided inside so that dust in the room can be smoothly sucked through the suction hose 2.

The first extension means 110 includes an extension pipe 111 forming a keyhole-shaped pipe, a fixing part 112 having a concave groove 111b formed above a cylindrical dust intake port 111a of the extension pipe 111, A first lead wire 113 fixed to one side of the fixing portion 112 so as to be inserted into and connected to the connection portion 4 of the handle member 3, and a fixing portion connected to the first lead wire 113. A pair of first power cable wires 114 fixed to 112 and provided in parallel with the central axis of the extension tube 111;
13 and a length adjusting means 115 provided inside the extension tube 111.

Here, the length adjusting means 115 is provided as shown in FIG.
As shown in FIG. 5, a concave groove 115b formed to have a locking protrusion 115a at a predetermined position on the inner peripheral surface of the extension tube 111, and is locked to the locking protrusion 115a of the concave groove 115b. A spring fixing member 115f having a locking portion 115c, a rectangular through hole 115d formed in the center, and an escape portion 115e formed at a lower portion of the rectangular through hole 115d by a predetermined length longer than the rectangular through hole 115d; A leaf spring 115g that is projected upward at a predetermined height, and is bent so as to be accommodated in an adjustment groove of a second extension means described later while being extended and contracted while being supported by the escape portion 115e and having an extended amount. Consists of

Further, the second extension means 120 is connected to the dust suction port 111a of the extension means 111 and is provided with a connecting pipe 121 having a protruding portion 121a inserted into the concave groove 111b. 121 projection 121a
The first power cable wire 1 is accommodated in the longitudinal direction.
14 is inserted in an adjustable manner, and a pair of second power supply cable wires 122 adapted to supply power to the third lead wire 6, and a predetermined depth and a distance below the outer peripheral surface of the connection pipe 121. The length adjusting means 1
And a length adjusting groove 123 which is locked by fifteen leaf springs 115g.

Therefore, when the user applies power to the main body 1 to clean the room, the suction motor that generates a suction input while the power is applied to the power supply means provided in the main body 1 is driven. Power is applied so that the power can be supplied, and power is sequentially transmitted from the power supply means to the handle member 3 and the first extension means 110 and the second extension means 120 via electric wires arranged in the suction hose 2. Will be done.

At this time, the connecting portion 4 of the handle member 3 includes
Since the first lead wire 113 is connected,
The first extension means 110 and the second extension means 120
First and second power cable wires 11 provided via
Power can be transmitted to the suction port body 5 by the connection of 4,122.

That is, the suction port body 5 is provided with the second
Since the third lead wire 6 connected to the end of the power supply cable 122 is disposed, the drive motor electrically connected to the third lead wire 6 by an electric wire is driven while the suction is performed. By rotating the power brush disposed in the mouth 5, dust and foreign substances on the indoor floor surface are scattered.

According to the above, the dust and foreign substances on the floor in the room are scattered by the power brush, so that the dust and the foreign substances are contained by the suction force of the suction motor built in the main body 1. The air is sucked in so that the room can be easily cleaned.

On the other hand, when cleaning a room at a long distance or a short distance when cleaning the room, the extension pipe 100 between the handle member 3 and the suction port body 5 is connected to the first pipe. The second extension means 120 is pulled out from the first extension means 110 or is pulled in and moved to an appropriate length in accordance with the distance of the cleaning part, and then the cleaning is performed.

At this time, the first and second power supply cable wires 114 and 122 provided in the first extension means 110 and the second extension means 120 have a long leaf spring 115g of the length adjustment means 115. The power brush is rotated so that the power brush disposed in the suction port body 5 can be rotated by being fixed in the telescopic type while being locked in the adjustment groove 123 and constantly maintaining the contact point. Power is transmitted to the drive motor.

Therefore, when cleaning the room, regardless of whether the place to be cleaned is near or far from the user, the handle member 3 and the suction member are always moved by the first and second extension means. By making the distance to the mouth 5 variable, the user can more easily perform cleaning.

[0021]

By the way, the first extension means 110 of the extension pipe 100 is configured such that the first power supply cable wire 114 is made parallel to the extension pipe 111 to extend the extension pipe 11.
In addition to the fact that the second extension means 120 is not easily provided in the inside of the connection pipe 121, the length adjustment groove 123 and the dust suction port are formed while the second power supply cable wire 122 is insert-molded in the protrusion 121a of the connection pipe 121. There is a disadvantage that it is difficult to integrally form the base 121b with the base 121b.

Further, a second lead wire 6
When the power cable 122 is inserted and connected,
There is a disadvantage that poor contact occurs.

Further, the first power cable wire 114
When the first lead wire 113 is inserted and connected to the connector, not only a contact failure occurs but also the first lead wire 113 is pulled out from the first power cable wire 114 and detached. was there.

[0024]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned various problems, and an object of the present invention is to provide:
When cleaning the room, regardless of whether the place to be cleaned is near or far from the user, the length of the connecting means can be adjusted for easy cleaning, and no poor contact will occur. To provide an extension tube for a vacuum cleaner that is easy to manufacture.

[0025]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a power supply which is supplied with electricity even when the length of the first and second extension means is adjusted by the extension adjustment means. An extension pipe for a vacuum cleaner having a power supply means having both ends fixed to first and second extension means so that the power supply means has both ends fixed to the first and second extension means. A telescopic power supply cable which is made extendable and contractable so that power can be supplied thereto; and a telescopic power supply cable which is inserted so that the telescopic power supply cable is not exposed and one end of which is fixed to the first extension means. And a power cable cover.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 6 is a perspective view of an extension tube, and FIG. 7 is an exploded perspective view of the extension tube. The same parts as those in FIGS. Detailed description is omitted.

The extension pipe includes a first extension means 200 connected to a power supply to a third lead wire 6 of the suction port body 5 adapted to smoothly suck dust in the room,
A second extension means 300 connected to a connection portion 4 of the handle member 3 connected to a suction hose 2 for guiding a foreign substance to the main body 1, and inhaled through the first extension means 200. The first and second extension means 2 are moved so that foreign substances are transferred to the suction hose 2 through the second extension means 300.
Extension adjusting means 400 provided so as to be adjustable in length between the first and second extension means 200 and 3;
When the length adjustment is performed between the first and second extension means 20 and the first and second extension means 20 so that the power can be supplied.
Power supply means 500 fixed to 0,300.

Here, as shown in FIGS. 6 to 8, the first extension means 200 includes a first pipe main body 210 which is in close contact with the suction port body 5, and a first pipe main body 21.
Compression spring 220 erected vertically on the upper end of one side
And a tightening button 230 provided rotatably at an upper end of one side of the first pipe main body 210 and provided so as to be elastically supported by the compression spring 220.
A lower terminal base 240 having a predetermined shape formed of an insulating material so that the compression spring 220 and the tightening button 230 are provided, and one end attached to the lower terminal base 240 to form the third lead wire 6. Terminal connection member 250 including a lead terminal 251, a wire 252, and a circular terminal 253, and an upper terminal to which one end of the terminal connection member 250 provided on the lower terminal base 240 is attached. An insulating material is attached to the base 260 and the first pipe main body 210 so that the telescopic telescopic power cable 510 of the telescopic type which can be extended and contracted by the power supply means 500 and the other end of the terminal connecting member 250 is fixed. Molded first
And a screw nail 2 for fixing the other end of the terminal connecting member 250 to the first fixed base 270.
80, the compression spring 220, the tightening button 230, and the screw 280 are coupled to the first pipe body 210 via a screw 281 so that the screw 280 is not exposed to the outside. And a first pipe main body cover 290 provided.

The first pipe body 210 includes a tightening button mounting portion 211 to which the tightening button 230 is rotatably mounted, a base mounting portion 212 to which the lower terminal base 240 is mounted, and the first pipe main body 210. Fixed base 27
0, a fixed base mounting portion 213, a wire support portion 214 for housing and supporting the wire 252 of the terminal connecting member 250, and a telescopic power supply for housing and mounting one end of the telescopic power cable cover 520. A cable cover attaching portion 215,
A projection 291 of the first pipe main body cover 290 formed between the sealing member mounting portion 216 to which the first sealing member 410 is mounted and the fixed base mounting portion 213 and the telescopic power cable cover mounting portion 215 is formed. A square hole 217 to be inserted and the respective mounting portions and support portions are provided, and the third lead wire 6 is inserted and connected to the lead terminal 251 of the terminal connecting member 250 housed in the lower terminal base 240. A projection 218a having a hole so as to be rotatable, and a buddy 218 having an anti-rotation projection 218b on the inner peripheral surface.

The sealing member mounting portion 216 includes a sealing member mounting flange 216a having a chamfered end at the first pipe main body 210, and a sealing member having a predetermined width and diameter formed inside the sealing member mounting flange 216a. It has a structure provided with a stop groove 216b.

Further, as shown in FIGS. 6, 7, 9 and 10, the second extension means 300 is inserted into the connection portion 4 of the handle member 3 and connected thereto. 310, a second fixed base 320 attached to a predetermined position on the upper surface of the second pipe main body 310 and formed of an insulating material so that the telescopic power cable 510 of the power supply means 500 is fixed. The circular terminal 331, the wire 332, and the connecting portion 4 of the handle member 3, which are expanded so as to be in close contact with the telescopic power cable 510 disposed on the upper portion of the second fixed base 320, are connected. Lead terminal 3
33, a screw nail 340 for fastening the end of the lead wire 330 and the telescopic power cable 510 to the second fixed base 320, and the second pipe body 310. And the second fixed base 320 attached to the second and the second fixed base 320 so that most of the lead wires 330 are not exposed to the outside.
A second pipe main body cover 350 coupled to the second pipe main body 310, and a screw nail 360 for fastening the second pipe main body cover 350 to the second pipe main body 310.

Here, the second pipe body 310 is
Reinforcement overlay 311 into which power supply means 500 is inserted
A fixed base attaching portion 312 to which the second fixed base 320 is attached, and a wire supporting portion 313 that accommodates and supports the wire 332 of the lead wire 330.
A terminal support portion 314 on which the lead terminal 333 of the lead wire 330 is supported, and a power supply means 500 which is projected upward from the reinforcing overlay portion 311 to the fixed base mounting portion 312 in parallel with a predetermined height to be described later. A telescopic power cable cover guide 315 formed so as to guide the telescopic power cable cover 520 without movement, and opposing both ends so that the second pipe main body cover 350 is attached to the second pipe main body 310. Pairs of mounting hooks 316 formed to be
And a pair of inner peripheral surfaces formed on the inner peripheral surface of a portion which is drawn in by a predetermined length from a tip portion on which the reinforcing overlay portion 311 is formed so that a rotation preventing protrusion 422 of the extension pipe 420 described later is fitted. Anti-rotation groove 317 and the reinforcing overlay 311
A housing fixing portion 318 formed such that a lower inclined projection 431 of a pipe fixing housing 430 described later is inserted and attached to a hole having a diameter larger than the inner diameter of a portion where the rotation preventing groove 317 is formed at a lower portion of the housing. It has a rectangular hole 319 formed so that the operation of a two-way operation knob 490 described later can be performed back and forth.

Further, the mounting hook 316 of the second pipe body 310 constituting the second extension means 300 is
It goes without saying that a plurality of pipes are provided at equal intervals in the longitudinal direction of the second pipe main body 310 so as to be in close contact with the second pipe main body cover 350 constituting the second extension means 300 without any gap.

In this embodiment, the mounting hook 3
In the figure, four pairs are provided in a state where 16 are opposed to each other.

Here, the second pipe body cover 35
In order to be attached to the mounting hook 316, a groove or a protrusion may be formed in the longitudinal direction on the inner side of the inner hook 0, and the groove may be formed only at a position corresponding to the mounting hook 316. It may be formed or a protrusion may be formed.

Further, the housing fixing portion 318
As shown in FIGS. 9 and 10, a guide groove 318a for guiding the lower inclined protrusion 431, and the lower inclined protrusion 431 is inserted and received through a lower portion of an end of the guide groove 318a. , Pipe fixed housing 4
30 comprises a square through hole 318b formed so as not to be detached from the second pipe main body 310.

On the other hand, as shown in FIGS. 7, 11 to 19, the extension adjusting means 400 is connected to an end of the first pipe main body 210 and is provided so as to be sealed. A sealing member 410;
The extension pipe 42 which is inserted into the inside of the pipe body 310 and the tip of which is inserted into the inside of the first pipe body 210 and is fixed by the first pipe body cover 290.
0 and the extension pipe 4 inserted into the extension pipe 420 and inserted into the second pipe body 310.
And a second sealing inserted into the rear end of the pipe fixing housing 430 to prevent air from flowing in the area where the pipe comes into contact with the extension pipe 420. A member 440, a detachment prevention wheel 450 into which the extension pipe 420 is inserted so that the extension pipe 420 is not removed from the pipe fixing housing 430 and the second sealing member 440, and the pipe fixing housing 430.
C-shaped spring 460 provided at an intermediate portion of the outer peripheral surface of
A roller support member 470 attached in close contact with the pipe fixing housing 430 by a mold spring 460, a roller 480 supported and determined by the roller support member 470, and a roller 480 inserted into the lower end of the second pipe body 310. The extension pipe 420 has a two-way operation knob 490 provided with a hook 491 so that the length of the extension pipe 420 can be protruded and retracted by being hooked and coupled to the roller support member 470 to be operated back and forth.

Here, the first sealing member 410
Is a soft elastic band portion 411 attached to the sealing member attaching flange 216a, and an inner peripheral surface of the elastic band portion 411 inserted into the sealing member attaching flange 216a, inserted into the locking groove 216b and locked. A plurality of locking projections 412 are formed on the elastic band portion 411 so as to prevent air from flowing between the connecting surfaces of the extension pipe 420 and the first pipe main body 210 fitted into the first pipe main body 210. And a sealing projection 413 projecting from the inner peripheral surface.

The extension pipe 420 has a rectangular through hole 421 into which the projection 291 of the first pipe main body cover 290 is inserted, and a pair of rectangular through holes 421 formed at predetermined ends at opposite ends. 422, a plurality of length adjustment grooves 423 formed along the longitudinal direction in a saw blade shape below the square through hole 421, and a rotation prevention protrusion 218b of the first pipe main body 210. It has a structure having a rotation preventing portion 424 formed so as to be fitted.

Further, the pipe fixing housing 430
Is a square through hole 318b of the housing fixing portion 318.
An inclined projection 431 provided on the outer peripheral surface so as to be inserted into and fixed to the inside; a suction hole 432 formed at the center in the axial direction so that dust and the like can be sucked; A sealing member attachment portion 433 formed so that a second sealing member 440 is attached to a tip portion inserted into the sealing member attachment portion 433;
And a square hole 435 into which the roller 480 is inserted at a predetermined position of the roller mounting member guide 434.
And a spring locking portion 43 to which the C-shaped spring 460 is attached so that the roller support member 470 can be locked.
6

The sealing member mounting portion 433 is formed with a circumferential groove 433a into which an axial flange 441 described later of the second sealing member 440 is inserted, and a pipe fixing housing 430 is provided at a predetermined position of the circumferential groove 433a. A protrusion fixing groove 433b is formed so as to be communicated with the outer peripheral surface of.

The roller mounting member guide portion 434 is formed with a pair of central guide protrusions 434a protruding to the square hole 435 at the sealing member mounting portion 433, and at a predetermined circumferential distance from the central guide protrusion 434a. And a side guide protrusion 434b projected to a predetermined length so as to guide the roller support member 470.

The second sealing member 440 includes a flange 441 inserted into the circumferential groove 433 a and a peripheral portion 4 that is in close contact with the front surface of the pipe fixing housing 430.
42, the position setting protrusion 4 which is connected to the flange 441 and the peripheral portion 442 and is inserted into the protrusion fixing groove 433b.
43 and a sealing projection 444 protruding from the inner peripheral surface so as to be in close contact when the extension pipe 420 expands and contracts.

The roller support member 470 has a square portion 472 having a groove 471 into which the C-shaped spring 460 is inserted, and a hook 491 of the two-way operation knob 490 inserted and locked. Hole 473 and the square hole 473
A pair of central guide grooves 474 formed to be guided by a central guide protrusion 434a of the roller mounting member guide portion 434 from the front end to the central guide groove 474;
A roller escape groove 475 formed so as to be accommodated when the roller 480 is detached from the length adjusting groove 423 of the extension pipe 420 at a predetermined position at a predetermined interval.

The power supply means 500 is shown in FIGS.
As shown in the figure, the first and second fixed bases 270, 32
The telescopic power cable 510 is fixed to both ends so that the telescopic power cable 510 can be energized and is supplied with power. The telescopic power cable 510 is inserted so as not to be exposed.
A telescopic power cable cover 520 fixed to the pipe main body 210 of this example, and a screw nail 530 fastened so that the telescopic power cable cover 520 can be fixed to the first pipe main body 210.

The telescopic power supply cable cover 520 has a rectangular outer cross section, and the telescopic power supply cable 510 is accommodated therein so that the telescopic power supply cable 510 can be accommodated therein and can be expanded and contracted.
The telescopic power cable cover mounting portion 215 of the first pipe main body 210 is formed at right angles between the telescopic power cable receiving hole 521 and the telescopic power cable receiving hole 521. The telescopic power cable of the second pipe body 310 is protruded to a predetermined height from the lower surface of the telescopic power cable housing hole 521. The structure is provided with a cover guide 523 that is brought into close contact with the side surface of the cover guide 315 so as to slide.

Hereinafter, the operation and effect of the present invention configured as described above will be described. The first extension means 20
0, the tightening button 230 is arranged so as to be elastically rotated via a compression spring 220 erected vertically in the tightening button mounting part 211 of the first pipe main body 210 constituting the first pipe body 210. After the pair of lead terminals 251 are housed so that the third lead wire 6 is properly connected to the lower terminal base 240 and the upper terminal base 260 is fixed, the first terminal
To the base mounting portion 212 of the pipe body 210 so as not to interfere with the tightening button 230.

Here, since the lower terminal base 240 and the upper terminal base 260 are made of an insulating material, deterioration due to heat generated from the lead terminals 251 can be prevented.

Thereafter, the circular terminal 253, which is the other end of the terminal connecting member 250, is connected to the telescopic power cable 510 constituting the power supply means 500 via the screw 280.
After fixing to the first fixed base 270 together with the tip of
The first fixed base 270 is attached to the fixed base attaching portion 213 of the first pipe main body 210, and the wire 252 portion of the terminal connecting member 250 is accommodated in the wire supporting portion 214 of the first pipe main body 210.

Next, a pair of telescopic power cables 5 is attached to the telescopic power cable cover 520.
10 is fitted and fixed to the telescopic power cable cover mounting portion 215 of the first pipe main body 210 via the screw nail 530.

Further, after the first sealing member 410 is connected to the sealing member mounting portion 216 formed at the rear end of the first pipe main body 210, the extension pipe 4
While fitting the tip of 20 to the detachment prevention wheel 450,
Rotation prevention part 4 formed at the tip of the extension pipe 420
The second sealing member 440 and the C-shaped spring 46
0, the roller support member 470, and the roller 480 are inserted through the pipe fixing housing 430, and are fitted to the rotation preventing protrusions 218b of the first pipe body 210 provided with the first sealing member 410. To a predetermined depth.

Here, the first sealing member 410
The sealing projection 413 prevents air from flowing between the extension pipe 420 and the inner peripheral surface of the first pipe main body 210, thereby increasing the suction efficiency of the vacuum cleaner.

Thereafter, the first pipe body cover 290 will be described.
The projection 291 projecting from the lower part of the first pipe body 21
0 and the extension pipe 42
In addition, the first pipe body cover 290 is inserted into the square through hole 421, and the first pipe body cover 290 is arranged so that the tightening button 230 can be operated, and attached to the buddy 218 with the screw nail 281.

Next, the rotation preventing projection 422 formed on the rear side of the extension pipe 420 is inserted into the second pipe main body 310, and the pipe fixing housing 430 fitted into the extension pipe 420 is connected to the second pipe main body. Body 310
When the second pipe body 310 and the extension pipe 420 are inserted and fixed so as to match the tip of the second pipe, the second pipe body 310 and the extension pipe 420 are prevented from rotating relative to each other.

Thereafter, the two-way operation knob 490 inserted into the rectangular hole 319 formed in the lower part of the second pipe body 310 and having the hook 491 attached to the square hole 473 of the roller support member 470 is moved forward and backward. When operated, the roller support member 470 can be moved back and forth.

At this time, when the roller 480 is positioned at the escape portion 471 of the roller supporting member 470, the roller 480 is detached from the length adjusting groove 423 of the extension pipe 420, and the extension pipe 420 is connected to the second pipe body 310. To be pulled out while being slid, or to be pulled in by being slid,
The overall length of the extension tube is stretchable.

Further, the second sealing member 440
The sealing projection 444 prevents air from flowing between the extension pipe 420 and the pipe fixing housing 430, and the second sealing member 440.
Is in close contact with the end of the circumferential surface where the rotation preventing groove 317 and the housing fixing portion 318 are formed, so that the inflow of air between the extension pipe 420 and the second pipe body 310 is prevented. As a result, the suction efficiency of the vacuum cleaner is increased.

Further, the telescopic power cable 510 and the telescopic power cable cover 520 of the power supply means 500 are inserted through the reinforcing overlay 311 of the second pipe body 310, and the cover of the telescopic power cable cover 520 is inserted. Guide 52
3 is a telescopic power cable cover guide 315
Then, the telescopic power cable 510 is fixed to the second fixing base 320 so that the end of the telescopic power cable 510 is in close contact with the pair of lead wires 330 via the screw nail 340, Fixed base 32
0 is attached to the fixed base attaching portion 312.

Thereafter, the wire 3 of the lead wire 330
32 and the lead terminal 333 are supported by the wire support 313 and the terminal support 314 of the second pipe main body 310,
The second pipe body cover 350 is connected to the power supply means 50.
0 and the lead wire 330 and the second fixed base 320
Is fixed to the mounting hook 316 by pressing so as not to be exposed to the outside, and is fixed with the screw 360. When the lead wire fixed to the second extension means is extended and contracted, the power supply means is a telescopic type. It is possible to reliably prevent the power supply from being disconnected from the power cable.

Thereafter, when the two-way operation knob 490 is pressed against either the front or the rear and the roller 480 is positioned at the escape portion of the roller support member 470, the extension pipe 4
The extension pipe 42 detached from the length adjustment groove 423
O is pulled out while being slid by the second pipe main body 310, or is slid and drawn in, so that the entire length of the extension pipe can be expanded and contracted.

At this time, one end of the extension pipe 420 constituting the extension adjusting means 400 is connected to the second sealing member 44.
Before the second sealing member 440 and the pipe fixing housing 43 are fitted into the detachable wheel 450 made of a plastic material before being fitted into the pipe fixing housing 430.
0, and then into the first pipe body 210 of the first extension means 200 and extend into the rotation preventing groove 317 formed in the second pipe body 310 of the second extension means 300. Rotation prevention protrusion 422 of pipe 420
Is provided so as to be inserted. On the other hand, since the pipe fixing housing 430 is fixed to the end of the second pipe main body 310, even if the extension pipe 420 is operated with a strong force, the rotation preventing projection 422 can be prevented from coming off.
It does not occur that the second sealing member 440 is engaged with the second sealing member 440 and is pulled out of the pipe fixing housing 430.

That is, the extension pipe 420 is
After being extended from the pipe body 310 to the maximum, even if further force is applied, the rotation preventing projection 422 of the extension pipe 420 comes into close contact with the detachment prevention wheel 450, and the detachment prevention wheel 450 Pipe fixing housing 430
Then, the second sealing member 440 fitted into the second member 440 is pressurized, and the rotation preventing protrusion 422 is disengaged.
0, and hardly deforms, and the force applied to the extension pipe 420 pushes the entire side surface of the detachment prevention wheel 450 to press the second sealing member 4.
40 and the pipe fixing housing 430 are prevented from being detached.

Further, the central portion of the second pipe main body 310 and the central portion of the second pipe main body cover 350 are brought into close contact with each other by mounting hooks 316 provided with three or more pairs, so that no gap is generated. Therefore, foreign substances cannot enter between the contact surfaces of the second pipe main body 310 and the second pipe main body cover 350.

When the extension pipe is used by extending the extension tube, the reinforcing cladding 311 supports the pressing force acting on the power supply means 500 so that the reinforcing cladding 311 is connected to the telescopic power cable 510 of the power supply means 500. The detachment of the second pipe body cover 350 can be prevented.

At this time, the telescopic power supply cable 510 of the power supply means 500 is energized from the terminal connecting member 250 to the lead wire 330 while being telescopically expanded and contracted with the change in the overall length of the extension tube. Become so.

Further, when the length of the extension tube is extended, the telescopic power cable cover 520 can be used.
The user's hand and the like do not touch the telescopic power cable 510.

[0067]

As described above, according to the present invention, the first extension means and the second extension means supply power through the extension adjusting means and the power supply means, and can inhale foreign substances. When performing indoor cleaning, there is an effect that cleaning can be easily performed regardless of whether the place to be cleaned is a short distance or a long distance from a user of the vacuum cleaner.

Further, a plurality of tightening hooks are provided in the longitudinal direction of the second pipe main body, and are connected to the second pipe main body cover so as to be tightly closed without any gap.
This has the effect of preventing foreign substances from entering the central portion of the pipe main body and the central portion of the second pipe main body cover.

Further, even when an external force is applied to the telescopic power cable of the power supply means and the second pipe main body cover, the second overlaying portion configured to maintain sufficient strength is provided by the reinforcing overlay. This has the effect of preventing the pipe body cover from being detached from the fastening hook portion.

On the other hand, the terminal connecting member fixed to the telescopic power supply cable of the power supply means by a screw and a lead wire is telescopically expanded and contracted with the change in the overall length of the extension tube. There is an effect that the power supply means is separated from the telescopic power cable and the power supply can be prevented from being cut off.

Further, since the terminal connecting member, the telescopic power cable and the lead wire are provided via the upper terminal base, the lower terminal base and the first and second fixed bases, the terminal connecting member and the telescopic power cable are provided. In addition, there is an effect that the first and second extension means are not likely to be deteriorated by heat generated from the lead wire.

The inflow of air from between the first pipe body of the first extension means and the extension pipe of the extension adjusting means inserted into the first pipe body can be prevented by the sealing projection of the first sealing member. effective.

Further, the second adjusting means constituting the extension adjusting means
The sealing projection of the sealing member can prevent air from flowing between the extension pipe and the pipe fixing housing, and the peripheral edge of the second sealing member forms an anti-rotation groove and an end of a circumferential surface forming the housing fixing portion. Since it is closely attached to the portion, there is an effect that air can be prevented from flowing into between the extension pipe and the second pipe main body.

Further, the extension pipe provided with the rotation preventing projection is inserted and slid in the rotation preventing groove of the second pipe main body, and the second pipe is inserted in the state where the detachment preventing wheel is fitted. It is possible to prevent the extension pipe from being detached from the second pipe body by the detachment prevention wheel by being inserted into and closely attached to the pipe fixing housing fixed to the end of the pipe body and the second sealing member. Of course, there is an effect that rotation is reliably prevented by the rotation prevention protrusion and the rotation prevention portion.

Further, there is an effect that the length of the first and second extension means can be easily adjusted through the extension pipe only by operating the two-way operation knob in the front-rear direction.

Further, a cover guide is provided below the telescopic power cable cover so as to be uniformly guided by the telescopic power cable cover guide formed on the second pipe body of the second extension means. As a result, the telescopic power cable cover is prevented from loosening, which has the effect of suppressing noise generation.

Although the specific embodiments of the present invention have been described in detail above, the present invention is not limited to these embodiments, and those skilled in the art may Various changes and modifications are possible based on the philosophy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vacuum cleaner to which a conventional extension pipe is applied.

FIG. 2 is an exploded perspective view of the extension tube.

FIG. 3 is an exploded perspective view of an extension pipe for a vacuum cleaner according to another conventional example.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a view showing an embodiment of the present invention, and is an overall perspective view of an extension pipe for a vacuum cleaner.

FIG. 7 is an exploded perspective view of the extension tube.

FIG. 8 is an enlarged view of one end of the first pipe main body.

FIG. 9 is a sectional view taken along line CC of FIG. 7;

FIG. 10 is a diagram showing an embodiment of the present invention,
FIG. 7 is a partially cutaway perspective view of one end of a second pipe main body.

FIG. 11 is a perspective view of the first sealing member.

FIG. 12 is a sectional view taken along line DD in FIG. 11;

FIG. 13 is a diagram showing an embodiment of the present invention,
It is a perspective view of one end of an extension pipe.

FIG. 14 is an exploded perspective view of the pipe fixing housing, a roller supporting member, and a roller.

15 is a sectional view taken along line EE of FIG. 14;

FIG. 16 is a sectional view taken along line FF of FIG. 14;

FIG. 17 is a diagram showing an embodiment of the present invention,
It is a perspective view of a 2nd sealing member.

18 is a sectional view taken along line GG of FIG. 17;

FIG. 19 is a diagram showing an embodiment of the present invention,
It is a top view of a roller support member.

20 is a sectional view taken along the line HH in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Suction hose 3 Handle member 4 Connection part 5 Suction port body 6 Third lead wire 200 First extension means 300 Second extension means 400 Extension adjustment means 500 Power supply means 510 Telescopic power cable 520 Telescopic power supply Cable cover 521 Telescopic power cable receiving hole 522 Hole 523 Cover guide

──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number 1997 18016 (32) Priority date July 8, 1997 (July 7. 1997) (33) Priority claim country South Korea (KR) (58) Survey Field (Int.Cl. ⁷ , DB name) A47L 9/24 A47L 9/28

Claims (2)

(57) [Claims] 1. An electric power supply comprising: first and second extension means; extension adjustment means provided between the first and second extension means;
Telescopic power cable and
Telescopic power cable covering the cable
Comprising a power supply conductive member consisting of the cover, the extension adjustment
Both ends of the means are respectively fitted to the first and second extending means.
One of the telescopic power cables
Is fixed to the first extension means,
One end of the other cable is fixed to the second extension means, and
One cable is telescopically inserted into the other cable
The telescopic power cable cover is
An extension pipe for a vacuum cleaner, wherein the extension pipe is fixed to the first extension means . 2. The telescopic power cable cover has a telescopic power cable housing hole formed therein so that the telescopic power cable can be accommodated therein and can be extended and contracted, respectively. A hole is formed at a right angle between the power cable receiving holes, and a cover guide protruding to a predetermined height is provided on a lower surface where the telescopic power cable receiving hole is formed. The extension tube for a vacuum cleaner according to claim 1, wherein