WO2020091328A1

WO2020091328A1 - Telescopic pipe with built-in wire

Info

Publication number: WO2020091328A1
Application number: PCT/KR2019/014242
Authority: WO
Inventors: 하종목
Original assignee: 은성전자 주식회사
Priority date: 2018-10-29
Filing date: 2019-10-28
Publication date: 2020-05-07
Also published as: KR102065775B1; CN211270510U

Abstract

The present invention relates to a telescopic pipe with a built-in wire, comprising: an outer pipe; an inner pipe, which is movably inserted in the outer pipe, and in which a plurality of pitch grooves are formed in the longitudinal direction on the outer circumferential surface thereof; and a lock assembly which is installed to penetrate the wall surface of the outer pipe and which, when caught at the pitch grooves, locks the outer pipe and the inner pipe to be fixed to each other, wherein the inner pipe comprises: a main pipe body which forms an air passage in the longitudinal direction; and a sub pipe body which is separated from the main pipe body by a partition plate and forms a wire passage in the longitudinal direction. Accordingly, since a wire extending from the main body of a cleaner to a suction member passes through the inner pipe having a two-layer pipe structure, regardless of the telescopic state of the inner and outer pipes, shapes of the inner and outer pipes with the built-in wire may be simplified. Thus, the aesthetics of the appearance of the inner and outer pipes and movement functionality may be improved, and moreover, failure or damage is reduced so that maintenance of the telescopic pipe may be more efficiently managed.

Description

Electric wire built-in new tube

The present invention relates to an electric wire built-in telescopic pipe, and more specifically, to a telescopic pipe in which the inner and outer pipes move relative to each other, the inner pipe has a double-layered structure of the main body and the sub-tube, and a cleaner through the upper sub-tube It relates to an electric wire built-in telescopic pipe having a wire extending from the main body to a suction member that sucks dust and the like.

In general, a vacuum cleaner connects a main body provided with a power source and a suction member that sucks foreign substances to be cleaned, such as dust, through an expansion pipe and a flexible pipe. However, in recent years, as the cleaner performance is improved, a technique for mounting a driving unit such as a motor in the suction member and using the power of the driving unit to increase cleaning efficiency has been proposed.

Accordingly, the telescopic pipe is built in a wire for connecting the power of the cleaner body to the driving part of the suction member, for example, a telescopic extension pipe of the vacuum cleaner disclosed in Korean Patent Publication No. 10-2012-0057830.

This extension tube is composed of an inner tube 110 and an exterior 120 movably mounted along an axis thereon, as shown by reference numeral 101 in FIG. 1, and the exterior to embed the wire 241 as above. The inner and outer

insulating pipes

220 and 210 extending in the longitudinal direction are attached to the outer surface of 120.

Therefore, in the conventional extension tube 101 as described above, the outer insulating pipe 220 in the folded state is exposed to the outside of the exterior 120, and in the expanded state, the inner insulating pipe 210 is also exposed to the outside of the inner tube 110. In general, there is a problem in that the aesthetics of the extension tube 101 is greatly reduced.

In addition, the inner insulation pipe 210 is necessarily required to protect the electric wire 241 located outside the inner tube 110 in the expanded state, and thus the outer insulating pipe 220 is placed on the upper side to protect the entire electric wire 241. Likewise, since it must be disposed outside of the exterior 120, the outer structure of the extension pipe 101 is complicated by the inner and outer

insulating pipes

210 and 220, and there is a problem in that maintenance is difficult, such as a possibility of failure or damage.

The present invention has been proposed to solve the problems of the conventional extension tube as described above, and by improving the structure of the extension tube, that is, the inner and outer tubes, which embed the electric wire from the cleaner body to the suction member of the tip of the extension tube, that is, the extension tube, that is, The aim is to simplify the shape of the inner and outer tubes to increase the aesthetics of the appearance, improve athletic functionality, and further reduce the breakdown or damage, thereby making the maintenance of the new tube more efficient.

In addition, there is another purpose to make the expansion and contraction of the electric wires more smoothly at the inside of the inner and outer tubes, as well as to support or protect the entire electric wires as well as the telescopic portion more efficiently.

In addition, while simplifying the internal structure of the wire as described above, there is another object to be able to maintain or improve the sealing performance for the internal air passage.

In addition, while simplifying the internal structure of the wire as described above, while maintaining a solid assembly, such as suppressing the separation of the inner and outer tubes, there is another purpose to remove the user's inconvenience or damage that may occur during use.

In order to achieve this object, the present invention is an appearance; An inner tube movably inserted inside the exterior and having a plurality of pitch grooves formed in a longitudinal direction on an outer circumferential surface; And a lock bundle installed to penetrate the wall surface of the exterior so as to lock the exterior and the inner tube to be fixed to each other when caught in the pitch groove. The inner tube comprises a main body forming an air passage in the longitudinal direction. It provides a built-in telescopic pipe consisting of; and separated by the main body by a divider plate, a sub-pipe that forms a wire passage in the longitudinal direction.

In addition, a wire is embedded so as to pass through the sub-pipe from the rear end of the inner tube to be fixed to the front end of the exterior, and in the folded position, the inner tube is positioned at a rear end thereof at a distance from the front end of the exterior, and the front end is It is preferable to form a stretchable stretchable part in a space corresponding to a distance.

In addition, it is preferable that the front end is fixed to the front end side of the exterior, the rear end is disposed to be relatively movable along the inner circumferential surface of the inner tube, and includes a support tube for supporting the elastic part by the outer circumferential surface.

In addition, the support tube is coupled to the rear end, and includes a sealing material that seals a gap generated between the inner circumferential surface of the inner tube, and it is preferable that the front end is located in front of the front end of the exterior.

In addition, the lock bundle protrudes from the bottom surface toward the inner tube, and when the rear end of the outer tube is pulled out to the front end of the inner tube, the locking bundle includes a locking protrusion for preventing separation of the inner tube and the outer tube from the inner tube desirable.

According to the electric wire built-in extension pipe of the present invention, the inner pipe is made of a double-layer pipe structure, and the electric wire passing through the inner pipe always passes through the sub-pipe formed inside the inner pipe regardless of the expansion and contraction of the inner and outer pipes, thus simplifying the shape of the inner and outer pipes. It is possible to improve the aesthetics and motor function of the appearance of the inner and outer tube, and furthermore, it is possible to more efficiently maintain and maintain the new tube by reducing breakdown or damage.

In addition, since the support tube is disposed inside the inner tube so as to be fixed to the exterior beyond the tip of the inner tube, not only can the sealing performance for the internal air passage be improved by the support tube, but also extends outside the tip of the inner tube. It is possible to effectively support the portion of the electric wire located inside by a support tube.

In addition, while simplifying the internal structure of the electric wire as described above, the lock bundle that moves together with the exterior is prevented from being detached from the exterior by being caught by the tip of the inner tube, so that the assembly of the inner and outer tubes can be firmly maintained.

In addition, since the shape of the pitch of the lock groove and the pitch groove of the inner tube to make the inner and outer tubes fixed at a specific expansion and contraction by mutual locking is manufactured in the shape of a cone, the fingers between the pitch groove and the rear end of the exterior are in use. Safety accidents such as pinching can be prevented.

1 is a front sectional view showing a conventional vacuum cleaner extension tube.

Figure 2 is a perspective view showing the appearance of the electric wire built-in telescopic pipe in a folded position according to an embodiment of the present invention.

Figure 3 is a front sectional view of Figure 2;

4 is an enlarged view of a part of both ends of FIG. 3 in an enlarged view.

5 is an exploded perspective view showing the outer part of FIG. 2 as a center;

6 is an exploded perspective view showing an inner tube portion of FIG. 2 as a center;

7 is a cross-sectional view taken along line AA in FIG. 3.

FIG. 8 is a front sectional view showing the telescopic tube of FIG. 3 in an unfolded position.

9 is a partially enlarged perspective view showing a state in which a stopper of the stopper cap and the button bracket shown in FIG. 3 is engaged;

Hereinafter, a wire-built telescopic pipe according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The expansion pipe of the present invention, as shown by reference numeral 1 in FIGS. 2 and 3, largely comprises an outer appearance (3), an inner tube (5), and a lock bundle (7).

Here, first, the exterior 3 is a tube body attached to the inlet side of a suction member, such as a vacuum brush, when the telescopic tube 1 of the present invention is used as a suction tube of a vacuum cleaner, as shown in FIGS. 2 to 5 Likewise, it forms the outer body of the telescopic pipe 1 and has a cross-section of a flat track shape in accordance with the cross-sectional shape of the inner pipe 5. In addition, the exterior 3 is fitted with a connecting pipe 11 for connection with the suction member at the front end toward the suction member, the front end is closed by a closing cap 12, and a pipe guide through the grip 13 at the rear end. (15) is fitted. At this time, the grip 13 is a pair of fixed hooks 14 extending in the longitudinal direction to the top end of the upper end of the button bracket 71 shown below as shown in FIG. , It will interlock with the exterior (3). In addition, a suction member is connected to the front end of the connecting pipe 11, a connecting hose is inserted and connected from the rear end of the pipe guide 15, and a terminal block 31 to be described later is fixed by the closing cap 12.

The inner tube 5 is a tube body connected to the main body side of the vacuum cleaner, as shown in FIGS. 2 and 3, inserted into the inside of the exterior 3 and slidingly moved in the longitudinal direction, thereby extending and contracting the tube 1 As shown in FIG. 3, the rear end is positioned in front of the rear end of the inner tube 5 at the folded position where the exterior 3 is fully inserted into the inner tube 5, as shown in FIG. ). Therefore, the inner pipe 5 is fitted with a pipe guide 15 on the outer circumference of the rear end thereof, and the front end thereof is connected to the connecting pipe 11 through the support pipe 17.

In particular, the inner tube 5 of the present invention, as shown in Figures 3 to 6, has a double-layer structure divided into a main body 51 and a sub-body 53 on the cross section. Here, the main body 51 forms an air passage P in which the intake air moves, in the longitudinal direction. As shown in FIG. 6, the sub-body 53 is formed by the partition plate 55 to have a circular cross section. ) And compartments. In addition, the sub-pipe 53 forms a wire passage in the longitudinal direction above the main body 51 by the divider plate 55, and the divider plate 55 upwards so that the main body 51 has a circular cross section. It has a convex arc-shaped cross-sectional shape. On the other hand, the inner tube 5, as shown in Figures 3 to 6, a plurality of pitch grooves 20 disposed in the longitudinal direction on the outer circumferential surface is formed concave, each pitch groove 20 is equally spaced It is preferably arranged. At this time, the inner tube 5, as shown in Figure 7, the guide rail 19 for guiding the sliding button bracket 71 of the lock bundle 7 protrudes on the upper surface, formed in the longitudinal direction along the center line, , On this guide rail 19, a pitch groove 20 is formed. In addition, the inner tube 5 is as shown in Figures 3, 4 and 6, the stopper cap 57 is fitted to its tip to close the tip, and this stopper cap 57 is shown in FIGS. 8 and 9 As shown in, as described below, the locking protrusion 7 protruding from the bottom surface of the button bracket 71 of the lock bundle 7 is caught at the top edge 59, thereby moving the exterior together with the lock bundle 7 3 ) Let the exterior 3 stop at the unfolded position, which is the maximum drawn out from the inner tube 5, ie, no further advance at the transfer point.

On the other hand, the exterior 3 and the inner tube 5, as shown in Figures 3 and 4, the wire 21 entered from the body through the pipe guide 15 through the wire cover 23, the inner tube 5 ) To pass through the inside of the adjuvant 53 at the rear end, and to be fixed to the front end of the exterior 3, at the folded position as shown in FIGS. 3 and 4, that is, at the rear dead point of the exterior 3, The inner tube 5 is located at the rear end of the exterior 3 by a distance d from the front end of the exterior 3, and the electric wire 21 located in the interior space S of the exterior 3 generated in this distance (d) section Forms a coil-shaped stretchable portion 25 to allow stretching.

Preferably, as shown in FIGS. 3 to 5 so as to support the upper and lower elastic parts 25 of the electric wire 21 inside the exterior 3, the support tube 17 is provided inside the inner tube 5 As it is inserted, the support tube 17 is fixed at its distal end to the distal end of the exterior 3 at the folded position, and the rear end is inserted into the inner tube 5 to be relatively movable along the inner circumferential surface of the inner tube 5. Therefore, the support pipe 17 is in the folded position, as shown in Figure 3, the tip is located in front of the tip of the inner tube 5 to support the expansion and contraction portion 25 by the outer circumferential surface, connecting the pipe 11 to the tip ) Is inserted. In particular, the support pipe 17 is a sealing material 27 is inserted and coupled to the rear end thereof. The sealing material 27 has a leading end fitted into the inner circumferential surface of the rear end of the support pipe 17 and a rear end of the inner circumferential surface of the inner pipe 5 It is in close contact with the inner circumferential surface of the inner tube 5 and the gap between the outer circumferential surface of the support tube 17 to be sealed.

On the other hand, the electric wire 21 entering the pipe guide 15 from the cleaner body is input into the wire cover 23 in two strands, but is twisted into one strand in the wire cover 23 to enter the sub-body 53 . At this time, the wire cover 23, as shown by C in FIG. 6, the double S-shaped rib 29 protrudes on the bottom surface, by fitting the electric wire 21 into the rib 29, the pinching of the electric wire 21 or Stop forced dropouts. The wire 21 is also inserted into the terminal block 31, which is detachably mounted on the rear end of the connecting pipe 11, as shown in FIGS. 3 to 5, separated into two strands, and then inserted into the end of the telescopic pipe 1 It is connected to the suction member.

The lock bundle (7) is a means for locking and unlocking the exterior (3) and the inner tube (5) in an extended or reduced state, and is installed through the exterior wall to the exterior (3), FIGS. 3 to 5 As shown in, the button bracket 71 installed through the exterior 3 while exposed to the outside, the button cover 73 coupled to cover the button bracket 71, and the center of the button bracket 71 It is mounted and comprises a fastener 75 that protrudes toward the inner tube 5 through the bottom surface of the button bracket 71. Here, as shown in FIG. 7, the upper clamp 75 locks the exterior 3 and the inner tube 5 to be fixed to each other when caught in the above-described pitch groove 20. On the contrary, when the user presses the button bracket 71 through the button cover 73 forward or backward, it pops out of the pitch groove 20 and is released, thereby allowing relative movement of the inner tube 5 and the outer surface 3. On the other hand, the button bracket 71, as described above, a pair of locking projections 77 protrude on the left and right sides of the bottom surface, the locking projections 77, the rear end of the exterior 3 of the inner tube 5 When it is pulled out to the front end, the front end of the inner tube 5 is caught by the upper edge 59 of the stopper cap 57 fitted to the front end, in particular, so that the exterior 3 does not fall out from the inner tube 5.

Now, the operation of the telescopic tube 1 according to the preferred embodiment of the present invention will be described.

When the storage tube 1 of the present invention is being stored, as shown in FIGS. 3 and 4, the exterior 3 and the inner tube 5 are in the folded position, and the exterior 3 is no longer in the folded position. It is preferable that it is designed to achieve a rear dead point that cannot be retracted back, and the fastener 75 is caught in the pitch groove 20 at the end in this position, so that the inner tube 5 is not operated unless the lock bundle 7 is operated. Relative movement is blocked.

In this state, when the button cover 73 of the lock bundle 7 is pushed forward, the locking projection 79 in the form of a cross-section trapezoid protruding from the bottom surface of the button cover 73 is released from the upper surface of the clamp 75. At the same time, since the button bracket 71 pressed from the button cover 73 through the rear spring 81 presses the fastener 75 forward, the fastener 75 has an inclined surface at the bottom of the inclined surface of the pitch groove 20. By pushing along, the jam is released from the pitch groove 20. At this time, the pitch groove 20 forms a circular shape on a plane as shown in FIG. 6, and thus it is preferable to have a concave shape in the shape of a truncated cone. Accordingly, the fastener 75 is also preferable that the lower inclined portion has a truncated cone shape as shown in FIG. 5.

Subsequently, when the exterior 3 is continuously pushed, as shown in FIG. 4, while the fastener 75 is caught in the pitch groove 20 located at the foremost end, the telescopic pipe 1 is the maximum length that can be fixed. If you push forward, you will reach the above-mentioned transfer point and stop moving further. However, when the fastener 75 is caught in the frontmost pitch groove 20, when the button cover 73 is released, the button cover 73 is pressed by the restoring force of the compressed rear spring 81. Returning to the intermediate position aligned with the vertical direction and pressing the clamp 75 again by the restraining projection 79, so that the clamp 75 can no longer escape from the frontmost pitch groove 20, and the appearance 3 ) Is fixed to the inner tube (5) to maintain the maximum forward state. At this time, the electric wire 21, as shown in Figure 4, the front end of the expansion and contraction portion 25 is hung on the front end of the exterior 3, but the expansion and contraction portion 25 is elongated to cope with the movement of the exterior 3 have. On the other hand, the support pipe 17, the engaging hole 33 of the front end is hooked to the hook 35 of the rear end of the connection pipe 11, so that the exterior 3 advances together as above, and thus, FIG. 4 As described above, the elastic part 25 is supported so as not to be hit.

As described above, when the vacuum cleaner is operated in the elongated state, the outside air is strongly sucked together with foreign substances such as dust from the suction member by the vacuum pressure on the body side. At this time, the suction air passes through the air passage (P) through the support pipe (17), but is sealed between the support pipe (17) and the main body (51) by the sealing material (27), and the support pipe (17) Furthermore, the wire passage of the sub-body 53 is not only isolated from the air passage P, but also sealed between the main body 51, that is, the inner tube 5 and the exterior 3.

On the other hand, when the use is completed and the expansion pipe 1 is to be stored or the length of the expansion pipe 1 is to be reduced, the button cover 73 is pressed to retreat with the exterior 3, similar to the above-described forward movement. To do so, the fasteners 75 are fastened to the other pitch grooves 20 at the rear to fix the exterior 3 to the inner tube 5.

In the wire-built telescopic pipe of the present invention, the inner pipe is made of a double-layer pipe structure, and the wire passing through the inner pipe always passes through the sub-pipe formed inside the inner pipe regardless of the inner and outer pipe expansion conditions, thereby simplifying the shape of the inner and outer pipes. Therefore, it is possible to improve the aesthetics and athletic functionality of the appearance of the inner and outer tubes, and furthermore, to reduce the breakdown or damage, it is possible to more efficiently maintain the new tube.

Claims

Appearance (3);

An inner tube 5 which is movably inserted in the exterior 3 and has a plurality of pitch grooves 20 formed in a longitudinal direction on an outer circumferential surface; And

It is installed so as to penetrate through the wall surface of the exterior (3), when locked in the pitch groove (20), the exterior (3) and the lock tube (7) to lock the inner tube (5) to be mutually fixed;

The inner tube (5),

The main body 51 forming the air passage P in the longitudinal direction: and

It is separated from the main body (51) by a partition plate (55), the extension tube built-in electric wire, characterized in that consisting of; sub-body (53) forming a wire passage in the longitudinal direction.
The method according to claim 1,

The electric wire 21 is built in to pass through the sub-pipe 53 from the rear end of the inner tube 5 to be fixed to the front end of the exterior 3,

In the folded position, the inner tube 5 is positioned at the rear end of the external tube 3 by a distance d from the front end of the exterior 3,

The electric wire 21 is an electric wire built-in expansion pipe, characterized in that to form a telescopic portion (25) that can be stretched in the space (S) corresponding to the distance (d).
The method according to claim 2,

The front end is fixed to the front end side of the exterior 3, and the rear end is disposed to be movable relative to the inner circumferential surface of the inner tube 5, and includes a support tube 17 for supporting the elastic part 25 by the outer circumferential surface A new built-in pipe built in.
The method according to claim 3,

The support tube 17 is coupled to the rear end thereof, and includes a sealing material 27 that seals a gap generated between the inner circumferential surface of the inner tube 5,

A wire-conducting telescopic pipe, characterized in that its tip is located in front of the tip of the exterior (3).
The method according to claim 1,

The lock bundle (7) protrudes toward the inner tube (5) from its bottom surface, and when the rear end of the outer tube (3) is pulled out to the front end of the inner tube (5), it is caught by the front end of the inner tube (5) and the inner tube (5) and the wire (3) extension tube, characterized in that it comprises a locking projection (77) to prevent the separation of the exterior.