KR102093928B1 - Telescopic Pipe With A Built-in Wire - Google Patents

Abstract

The present invention relates to an extensible tube with a built-in wire, which comprises: an outer tube (3); an inner tube (5) which is movably inserted into the outer tube (3), and in which a plurality of pitch grooves (20) are formed in a longitudinal direction on an outer circumferential surface; and a lock bundle (7) which is installed to penetrate a wall surface of the outer tube (3), and locks the outer tube (3) and the inner tube (5) to be fixed on each other when the lock bundle (7) hangs on the pitch grooves (20). The inner tube (5) includes: a main tube body (51) which forms an air passage (P) in a longitudinal direction; and an auxiliary tube body (53) which is distinguished from the main tube body (51) by a dividing plate (55) to form a wire passage in a longitudinal direction. The outer tube (3) is characterized by being inserted into the inner tube (5) to avoid making a relative rotation against the inner tube (5) when it moves along the inner tube (5). Accordingly, the present invention can make a compact structure to make wires or the like pass through the inside of the inner tube made of a dual tube, improve the beauty of the exterior and mobility functionality, and reduce malfunctions and damages, thereby further maintaining the extensible tube more efficiently.

Description

Telescopic Pipe With A Built-in Wire}

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, so that the inner pipe has a two-layer structure of the main body and the sub-tube, and the cleaner through the upper sub-tube It relates to an electric wire built-in telescopic pipe having a wire extending from the body to a suction member that sucks dust and the like.

In general, a vacuum cleaner connects a main body equipped 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 a suction member and using the power of the driving unit to increase cleaning efficiency has been proposed.

Therefore, 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 tube 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. As a whole, there was a problem in that the aesthetics of the extension tube 101 was significantly reduced.

In addition, in order to protect the electric wire 241 located outside the inner tube 110 in the unfolded state, the inner insulating pipe 210 is necessarily required. Therefore, in order to protect the entire electric wire 241, the outer insulating pipe 220 is placed on the upper side. 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.

Patent Publication 10-2012-0057830

The present invention is proposed to solve the problems of the conventional extension tube as described above, and by improving the structure of the extension tube incorporating the electric wire leading from the cleaner body to the suction member of the tip of the extension tube, simplifying the shape of the extension tube The aim is to improve 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 tube and the exterior constituting the telescopic pipe, and to more efficiently support or protect the entire electric wire and the telescopic portion.

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, there is another object to suppress the relative rotation of the outer tube relative to the inner tube to maintain a solid assembly, and 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 that is installed to penetrate the wall surface of the exterior and locks the exterior and the interior tube to be fixed to each other when caught in the pitch groove. The interior tube is configured to form an air passage in the longitudinal direction. And a sub-pipe that is separated from the main body by a dividing plate and forms a wire passage in the longitudinal direction; and the exterior is formed on the inner pipe so as not to cause a relative rotation with respect to the inner pipe when moving along the inner pipe. Provides a built-in telescopic pipe to be fitted.

In addition, an electric wire is built in 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 of the inner tube by a distance from the front end of the exterior, and the wire is the 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 pipe is coupled to the rear end, and includes a sealing material that seals a gap generated between the inner circumferential surface of the inner pipe, and it is preferable that the tip is located in front of the tip of the exterior.

In addition, it is preferable that the outer tube and the inner tube have non-circular cross-sectional shapes that are well matched to each other so that the outer tube does not rotate relative to the inner tube when moving along the inner tube.

In addition, the inner tube includes a stopper cap that is fitted to close the tip, and the stopper cap is cut out to prevent rotation of the lock bundle so as to fit the rocker holder of the lock bundle in an extended position by pulling the exterior from the inner tube to the maximum. It is preferable to have.

According to the electric wire built-in expansion pipe of the present invention, the inner pipe is manufactured in a double-layered 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 inner and outer expansion and contraction conditions, so the shape of the inner and outer pipes It is possible to simplify, and thus improve the aesthetics and motor function of the external and external appearance at the same time, 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 wire located inside by a support tube.

In addition, since the internal structure of the electric wire is simplified as described above, the non-circular shape of the inner tube and the exterior are more specifically shaped to have an elliptical cross-sectional shape, and furthermore, a locker holder of the lock bundle is provided in the rotation preventing groove of the inner tube stopper cap. Since it is sandwiched, it is possible to efficiently suppress the relative rotation of the outer tube relative to the inner tube, and therefore, the assembly between the inner tube and the outer tube can be firmly maintained, and inconvenience or damage that may occur during use can be eliminated.

In addition, since the shape of the lock groove of the lock bundle and the pitch groove of the inner tube to fix the inner and outer tubes at a specific expansion and contraction by mutual locking are manufactured in a conical shape so as to be circular on a flat surface, a finger between the pitch groove and the rear end of the exterior is used. 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 expanded position.
FIG. 9 is a partially enlarged perspective view showing a locked state of the stopper cap and the rocker holder shown in FIG. 3.
10 is a partially enlarged longitudinal sectional view of the lock bundle of FIG. 9 cut along an inclined groove in an assembled state.

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 to 4, is largely made up of the exterior (3), the inner tube (5), and the lock bundle (7).

Here, first, the external appearance 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 tube 1 and has an elliptical cross-section according to the cross-sectional shape of the inner tube 5. At this time, the outer surface 3 is fitted in the inner tube 5 so as not to cause a relative rotation with respect to the inner tube 5 in a non-circular shape, preferably an ellipse, more preferably as shown in Fig. 7, the lower half is wider than the upper half It has an egg-shaped oval cross section.

In addition, the exterior 3 is fitted with a connecting pipe 11 for connection with the suction member at the front end facing the suction member, the front end is closed by a closing cap 12, and a cap pipe 13 is fitted at the rear end. .

At this time, a suction member is connected to the leading end of the connecting pipe 11, a connecting hose is inserted and connected from the rear end of the holder pipe 15 to be described later, and a terminal block 31 to be described later is fixed by a closing cap 12. In addition, the cap pipe 13, as shown in detail in Figure 9, the outer peripheral portion 22 extending in the form of a ring on the outside of the outer surface 3 to contact the outer peripheral surface of the outer surface 3, the outer end of the outer surface 3 It consists of an inner circumferential portion 24 extending in the shape of a tube inside the outer surface 3 so as to contact the inner circumferential surface, and the rear edge of the outer surface 3 is fitted to the groove portion of the boundary between the outer circumferential portion 22 and the inner circumferential portion 24 In particular, the inner circumferential portion 24 has a front end portion 18 as shown in FIG. 9, as shown below, is hung on a stopper cap 57 coupled to the front end of the inner pipe 5, and the exterior 3 has an inner pipe 5 ) Don't let it stray forward. The rotation preventing groove 18 is formed in the front part of the upper surface so as to fit the rear portion of the locker holder 71 of the lock bundle 7.

The inner tube (5) is a tube body connected to the main body side of the vacuum cleaner, as shown in FIGS. 3 and 4, inserted into the inside of the exterior (3) and sliding in the longitudinal direction, thereby extending and contracting the tube (1) As shown in FIG. 3, the rear end is located behind the rear end of the exterior 3 at the folded position where the exterior 3 is fully inserted over the inner tube 5, and the front end is exterior 3 ). Therefore, the inner pipe 5 is fitted with a holder pipe 15 on the outer circumference of the rear end thereof, and the front end thereof is connected to the connecting pipe 11 through a support pipe 17. At this time, in the holder pipe 15, the locking lever 16 extending downward from the connecting handle 14 penetrates the upper surface and protrudes into the inner circumferential surface, so that the connecting hose from the cleaner body can be detached by the locking lever 16 Insert, connect.

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 FIGS. 6 and 7, the sub-pipe by the divider plate 55 to have a circular cross section It is separated from the sieve 53. 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 arranged in the longitudinal direction on the outer circumferential surface is formed concave, each pitch groove 20 is equally spaced It is preferably arranged to form.

At this time, when the inner tube 5 is inserted into the outer circumferential surface and the sliding exterior 3 moves along the inner tube 5, rotation must be restricted so as not to cause relative rotation with respect to the inner tube 5, as mentioned above. The cross-sectional shape is made of a non-circular shape, and at the same time, it is matched with the appearance 3 having a similar shape. That is, for example, as shown in Fig. 7, the inner tube 5 and the outer surface 3 are fitted in a mutually matched state with a wider egg-shaped cross-sectional shape. Therefore, the relative rotation with respect to the inner tube 5 is prevented while the outer tube 3 is moved over the inner tube 5. Moreover, as shown in FIGS. 3, 4, 6, and 9, the inner tube 5 is closed with a stopper cap 57 fitted at its tip, thereby maximizing the appearance 3 from the inner tube 5 In order to fit the rocker holder 71 of the lock bundle 7 in the unfolded and fixed position, the stopper cap 57 is formed with a cut-off groove 59 cut on its upper surface. Therefore, the inner tube 5 can further suppress the relative rotation of the exterior 3 through the anti-rotation groove 59. At this time, the stopper cap 57, as shown in Figure 9, the rear end is in contact with the tip of the inner circumferential portion 24 of the cap pipe 13, by preventing the advancement of the cap pipe 13, the appearance (3) It is prevented from deviating from the inner tube 5. However, the inner tube 5, as shown in Figures 6 and 7, so that the pitch groove 20 in the longitudinal direction at the top while enabling matching with the exterior (3), the radially inner side of the upper inner circumferential surface As the pitch groove seat 19 protrudes and extends in the longitudinal direction, the pitch groove 20 is concavely formed on the pitch groove seat 19.

On the other hand, as shown in Figures 3 and 4, the exterior (3) and the inner tube (5), the wire (21) entered from the main body through the holder pipe (15) is a terminal cover (23) and a holder terminal (26). ) To pass through the inside of the adjuvant 53 at the rear end of the inner tube 5 to be fixed to the front end of the exterior 3, that is, at the folded position as shown in FIGS. 3 and 4, that is, the exterior 3 At the rear dead center of), the inner tube 5 is located at a distance (d) behind the front end of the exterior 3, and in the interior space S of the exterior 3 occurring in this distance (d) section. The positioned wire 21 forms a stretchable portion 25 in the form of a coil so as to be stretchable.

Preferably, as shown in FIGS. 3 to 5 so that the upper and lower portions 25 of the electric wire 21 can be supported inside the exterior 3, the support pipe 17 is provided inside the inner tube 5. As shown in FIG. 3, the support tube 17 is fixed at the distal end of the exterior 3 at the folded position as shown in FIG. 3, and the rear end is capable of relative movement along the inner circumferential surface of the inner tube 5 ( 5) It is inserted inside. Therefore, the support pipe 17 is positioned at the front end of the inner pipe 5 in the folded position to support the expansion and contraction portion 25 by the outer circumferential surface, and the connecting pipe 11 is fitted to the front end. In particular, the support tube 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 tube 17, and a rear end of the inner circumferential surface of the inner tube 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 holder pipe 15 from the cleaner body is input in three strands between the terminal cover 23 and the holder terminal 26, but between the holder pipe 15 and the rocker holder 71. Twisted in one strand, enters the adjuvant (53). At this time, the holder pipe 15 is a bar of a plurality of bending ribs 29 protruding from the upper surface, as shown by B in FIG. 6, by fitting the electric wires 21 into the ribs 29, Stop forced dropouts. The wires 21 are also separated and inserted into three strands again from the terminal block 31 which is detachably mounted on the rear end of the connecting pipe 11, as shown in FIGS. 3 to 5, and then 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 at the rear end of the exterior 3, FIGS. 5 and 9, a rocker holder 71 installed through the exterior 3 while exposed to the outside, a button cover 73 coupled to cover the rocker holder 71, and a rocker holder 71 ) Mounted in the center, the rocker 75 which penetrates the bottom surface of the rocker holder 71 and protrudes toward the inner tube 5, and is mounted between the button cover 73 and the rocker holder 71, a spring (not shown) It comprises a rocker slide (77) for restraining or releasing the rocker (75) while moving back and forth on the rocker holder (71) when pressed or released by the supported button cover (73).

Here, as shown in FIG. 7, the upper rocker 75 is locked so that the exterior 3 and the inner tube 5 are fixed to each other when caught in the above-described pitch groove 20. On the contrary, when the user presses the rocker holder 71 through the button cover 73 forward or backward, it pops out of the pitch groove 20 and leaves, thereby allowing relative movement of the inner tube 5 and the exterior 3. In addition, as described above, the rocker holder 71 is fitted to the rotation preventing groove 59 of the stopper cap 57 at the unfolded position shown in FIG. 9, that is, the transfer point, and thus the appearance of the inner tube 5 (3) Relative rotation is prevented.

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 to be designed to achieve a rear dead point that cannot be retracted back, and the locker 75 is caught in the pitch groove 20 at the end in this position, to the inner tube 5 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 pressed, as shown in FIG. 10, the pressing protrusion 74 protruding from the inner surface of the button cover 73 has an inclined groove of the rocker slide 77 ( 78) is pressed, and the rocker slide 77 is moved to the right, or rearward, in the figure. Accordingly, the rocker 75 is aligned with the movable groove 79 concavely formed on the bottom surface of the rocker slide 77, thereby securing a space to climb upward. In this state, if the button cover 73 is continuously pushed forward or backward, the rocker 75 is pushed in the same direction by the rocker slide 77 and pushed up along the inclination of the pitch groove 20 to raise the pitch groove 20 ) To release the jamming of the inner tube 5, and thus the locking of the inner tube 5 and the exterior 3 is released. At this time, the pitch groove 20 is formed in a circular shape on the plane as shown in Fig. 9, so it is preferable to have a concave shape in the shape of a truncated cone as a whole.

Subsequently, if the exterior 3 is continuously pushed, as shown in FIGS. 8 and 9, while the rocker 75 is caught in the pitch groove 20 positioned at the foremost end, the telescopic pipe 1 can be fixed. The maximum length is reached, and the exterior 3 reaches the transfer point that cannot be pushed forward as described above, and further progress is stopped. At this time, the rocker holder 71 is fitted to the rotation preventing groove 59 of the stopper cap 57, thereby suppressing the relative rotation of the exterior 3 with respect to the inner tube 5.

In this state, when the hand is released from the button cover 73, the button cover 73 is raised by the spring restoring force, and accordingly, the rocker slide 77 where the pressurization of the pressing protrusion 74 disappears is also the restoring force of the bell spring 81 While pressing the original position, the rocker 75 is pressed downward by the inclination of the movable groove 79. Therefore, the rocker 75 is inserted into the pitch groove 20 again, and the rocker slide 77 restrains it from rising. Accordingly, the rocker 75 is locked again by the pitch groove 20, thereby locking the exterior 3 on the inner tube 5, and the exterior 3 and the inner tube 5 are fixed to each other to the maximum. Keep them moving forward.

At this time, the electric wire 21, as shown in Figure 4, the front end of the expansion and contraction section 25 is hung on the front end of the exterior 3, but since the expansion and contraction section 25 is extended, it can cope with the movement of the exterior 3 have. On the other hand, the support tube 17, the engaging hole 33 of the tip 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 is passed through the air passage (P) through the support pipe 17 while sealing is made 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 subsidiary body 53 is not only isolated from the air passage P, but is 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 make the rocker 75 to be caught in the other pitch groove 20 at the rear, the exterior 3 can be fixed to the inner tube 5.

1: New building tube 3: Appearance
5: inner tube 7: lock bundle
11: Connection pipe 12: Closing cap
13: cap pipe 15: holder pipe
17: support tube 19: pitch groove seat
20: pitch groove 21: wire
23: terminal cover 25: new construction
27: sealing material 31: terminal block
51: subjective body 53: subordinate body
55: partition plate 57: stopper cap
59: anti-rotation groove 71: rocker holder
73: button cover 75: rocker
77: rocker slide 81: bell spring
P: Air passage

Claims (6)

delete delete Appearance (3);
An inner tube 5 which is movably inserted in the exterior 3 and has a plurality of pitch grooves 20 in the longitudinal direction on its outer circumferential surface; And
It is installed so as to penetrate through the wall surface of the exterior (3), when locked to the pitch groove (20), the exterior (3) and the inner tube (5) to lock each other so that the lock bundle (7); is configured to include,
The inner tube (5),
The main body 51 forming the air passage P in the longitudinal direction: and
It is divided by the main body 51 by the partition plate 55, and is made of a sub-body 53 that forms a wire passage in the longitudinal direction;
The outer appearance 3 is fitted on the inner tube 5 so as not to cause a relative rotation with respect to the inner tube 5 when moving along the inner tube 5,
The 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 outer tube 3 by a distance d from the front end of the exterior 3,
The electric wire 21 forms a stretchable part 25 that can be stretched in a space S corresponding to the distance d,
The front end is fixed to the front end side of the exterior 3, and the rear end is disposed to be relatively movable along 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 the tip is located in front of the tip of the exterior (3). The method according to claim 3,
The outer tube 3 and the inner tube 5 have non-circular cross-sectional shapes that are well matched to each other so that the outer tube 3 does not rotate relative to the inner tube 5 when it moves along the inner tube 5. A new built-in pipe built in. The method according to claim 3,
The inner tube (5) includes a stopper cap (57) fitted to close the tip, and the stopper cap (57) pulls the exterior (3) out of the inner tube (5) and locks it in an extended position fixed to it Wire-conducting telescopic pipe, characterized in that it has a cut-off groove (59) so as to fit the locker holder (71) of the bundle (7).

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