CN211270510U

CN211270510U - Electric wire built-in extension tube

Info

Publication number: CN211270510U
Application number: CN201921594634.9U
Authority: CN
Inventors: 金钟国; 崔永涛; 河宗穆
Original assignee: Tianjin Silver Star Metal Co ltd
Current assignee: Tianjin Silver Star Metal Co ltd
Priority date: 2018-10-29
Filing date: 2019-09-24
Publication date: 2020-08-18
Anticipated expiration: 2029-09-24
Also published as: KR102065775B1; WO2020091328A1

Abstract

The utility model relates to a wire with a built-in extension tube, which comprises a main body and a cover; an outer tube; an inner tube movably inserted into the outer tube and having a plurality of escape grooves formed in a longitudinal direction on an outer circumferential surface thereof; and a locking assembly which is arranged by penetrating the wall surface of the outer pipe, thereby locking the outer pipe and the inner pipe to be mutually fixed when the padlock is hung in the avoiding groove; the inner pipe is characterized by comprising a main pipe body forming an air passage in the length direction and a sub pipe body forming an electric wire passage in the length direction, wherein the inner pipe is divided from the main pipe body by a partition plate, so that the electric wire connected to the suction part from the dust collector body always passes through the inner pipe of the two-layer pipe structure regardless of the expansion and contraction state of the inner pipe and the outer pipe, thereby simplifying the form of the inner pipe and the outer pipe, improving the aesthetic quality and the movement functionality of the appearance of the inner pipe and the outer pipe, and further efficiently maintaining and managing the expansion pipe by reducing faults or damages.

Description

Electric wire built-in extension tube

Technical Field

The invention relates to a wire built-in telescopic pipe, in particular to a telescopic pipe in which an inner pipe and an outer pipe move relatively to each other and are telescopic, wherein the inner pipe is provided with a two-layer pipe structure of a main pipe body and an auxiliary pipe body, and the wire is connected from a dust collector body to a suction part for sucking dust and the like through the auxiliary pipe body on the upper side.

Background

In general, a vacuum cleaner is configured such that a main body having a power source and a suction member for sucking foreign substances to be cleaned are connected to each other through a flexible tube and a flexible hose. However, in recent years, with the improvement of the performance of vacuum cleaners, a technique has been proposed in which a driving unit such as a motor is mounted in a suction member, and the cleaning efficiency is desired to be improved by utilizing the power of the driving unit.

Therefore, the extension pipe houses a wire for connecting a power source of the cleaner body to a driving part of the suction unit, and an example thereof is an extension pipe of a vacuum cleaner disclosed in korean laid-open patent No. 10-2012 and 0057830.

The extension pipe is composed of an inner pipe 110 and an outer pipe 120 movably attached to the inner pipe along the axis as shown by reference numeral 101 in fig. 1, and inner and outer insulating pipes 220,210 extending in the longitudinal direction are attached to the outer surface of the outer pipe 120 so as to house the electric wire 241 as described above.

Accordingly, in the extension pipe 101 of the related art, the outer insulating pipe 220 leaks outside the outer pipe 120 in the folded state, and the inner insulating pipe 210 also leaks outside the inner pipe 110 in the unfolded state, which causes a problem that the appearance of the extension pipe 101 is entirely deteriorated.

Further, in the expanded state, the inner insulating tube 210 is inevitably required to protect the electric wire 241 located outside the inner tube 110, and the outer insulating tube 220 is necessarily arranged only outside the outer tube 120 as described above to protect the entire electric wire 241, so that the outer structure of the extension tube 101 by the inner and outer

insulating tubes

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

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems of the conventional extension tube, and an object of the present invention is to improve a structure of an inner tube and an outer tube in which an electric wire connected from a cleaner body to a suction member at a front end of the extension tube is built, thereby simplifying a form of the extension tube, i.e., the inner tube and the outer tube, to improve an appearance, to improve a motion functionality, to further reduce a trouble or damage, and to more effectively perform maintenance and management of the extension tube.

Another object of the present invention is to provide a wire harness that can be more smoothly stretched and contracted inside an inner tube and an outer tube, and that can be more effectively supported and protected by the entire wire.

Another object of the present invention is to provide a structure for incorporating a singulated wire as described above, which can maintain or improve the sealing performance against an internal air passage.

Another object of the present invention is to provide a built-in structure of a singulated electric wire, which can prevent the inner and outer tubes from being separated from each other, and can prevent inconvenience and loss of a user during use.

The invention for achieving the purpose is to provide a tube comprising an outer tube; an inner tube movably inserted into the outer tube and having a plurality of escape grooves formed in a longitudinal direction on an outer circumferential surface thereof; and a locking assembly which is arranged by penetrating the wall surface of the outer pipe, so that the outer pipe and the inner pipe are mutually fixed and locked when the padlock is hung in the avoiding groove; wherein the inner pipe is an electric wire built-in extension pipe composed of a main pipe body forming an air passage in the length direction and a sub pipe body forming an electric wire passage in the length direction, the sub pipe body being divided from the main pipe body by a partition plate.

Further, it is preferable that the electric wire fixed to the tip of the outer tube from the rear end of the inner tube through the sub tube is housed, the tip of the inner tube is located more rearward than the tip of the outer tube in the folded position, and the electric wire is formed into an extendable and contractible portion in a space corresponding to the distance.

Furthermore, comprising; the support tube is preferably arranged such that a front end is fixed to a front end side of the outer tube and a rear end is relatively movable along an inner peripheral surface of the inner tube, and the support tube supports the extendable portion by the outer peripheral surface.

Further, the locking assembly is comprised of; a padlock projection protruding from a bottom surface thereof toward the inner pipe so as to prevent separation of the inner pipe and the outer pipe at a front end of the inner pipe when drawing the rear end of the outer pipe to the front end of the inner pipe is most preferable.

According to the electric wire built-in telescopic tube created by the invention, the inner tube is made into a two-layer tube structure, so that the electric wire which always passes through the inner tube and is irrelevant to the telescopic state of the inner tube and the outer tube can pass through the auxiliary tube body formed in the inner tube, thereby simplifying the shape of the inner tube and the outer tube, further improving the aesthetic property and the motion functionality of the appearance of the inner tube and the outer tube, further reducing the faults or damages and further efficiently maintaining and managing the telescopic tube.

Further, since the support pipe fixed to the outer pipe via the front end of the inner pipe is disposed inside the inner pipe, not only the sealing performance for the internal air passage can be improved by the support pipe, but also the electric wire portion extending to the outside of the inner pipe but located inside the outer pipe can be effectively supported by the support pipe.

Further, the built-in structure of the electric wire is simplified as above, and the lock unit moving together with the outer pipe is latched to the tip end of the inner pipe without being detached from the outer pipe, so that the assembly of the inner and outer pipes can be firmly maintained.

In addition, because the shapes of the locking lock of the locking component and the avoiding groove of the inner tube are made into a circular truncated cone shape on the plane, the safety accidents such as clamping fingers between the avoiding groove and the rear end of the outer tube can be prevented in advance; the inner pipe and the outer pipe are fixed at a specific telescopic position by means of mutual padlock of the locking lock of the locking assembly and the avoiding groove of the inner pipe.

Drawings

Fig. 1 is a front sectional view showing an extension pipe of a conventional cleaner.

Fig. 2 is a schematic view showing an external appearance in a folded position of the electric wire built-in telescopic tube according to an embodiment of the present invention.

Fig. 3 is an elevational sectional view of fig. 2.

Fig. 4 is a partially enlarged view showing both ends of fig. 3 in an enlarged manner.

Fig. 5 is a schematic view shown exploded with the outer tube portion of fig. 2 as the center.

Fig. 6 is a schematic view shown exploded with the inner tube portion of fig. 2 as the center.

Fig. 7 is a cross-sectional view of the AA line of fig. 3.

Figure 8 is an elevational cross-section of the bellows of figure 3 shown in a deployed position.

Fig. 9 is an enlarged partial schematic view showing the padlock raised padlock status of the stop cover and button bracket shown in fig. 3.

Detailed Description

An electric wire built-in telescopic tube according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The telescopic tube created by the invention is shown as a drawing symbol 1 in figures 2 and 3 and comprises a large part; an outer tube 3, an inner tube 5 and a locking assembly 7.

Here, first, when the extension tube 1 according to the present invention is used as a suction tube of a vacuum cleaner, the outer tube 3 is a tube body attached to an inlet side of a suction member such as a vacuum brush head, and as shown in fig. 2 to 5, constitutes an outer body of the extension tube 1, and has a cross section in a rail shape in which an upper surface is flat in accordance with a cross section shape of the inner tube 5. The outer tube 3 is configured such that a connection tube 11 for connection to the suction member is sandwiched toward the front end of the suction member, the front end is terminated by an end cap 12, and a rear end tube guide 15 is clamped by a clamp 13. At this time, the clamp 13 is communicated with the outer tube 3 by a pair of fixing hooks 14 extending in the longitudinal direction at the upper front end thereof being inserted into a fixing groove 78 at the rear end of the bottom surface of the button holder 71 shown by B in fig. 5. The connection pipe 11 is connected to a suction member at its front end, and a hose is inserted and connected from the rear end of the pipe guide 15, and a terminal plate 31 described later is fixed to the end cap 12.

The inner tube 5 is a tube body connected to the main body of the vacuum cleaner, and is inserted into the outer tube 3 and slid in the longitudinal direction to fold or unfold the extension tube 1 as shown in fig. 2 and 3, and thus, in the folded position where the outer tube 3 is sandwiched between the inner tube 5 to the maximum extent, the rear end is positioned forward of the rear end of the inner tube 5 and the front end is positioned rearward of the front end of the outer tube 3 as shown in fig. 3. Thus, the inner pipe 5 is sandwiched by the pipe guide 15 on the outer periphery of the rear end thereof, and the front end thereof is connected to the connection pipe 11 through the support pipe 17.

In particular, the inner tube 5 created by the present invention is a two-layer tube structure having a primary tube body 51 and a secondary tube body 53 distinguished in cross section as shown in fig. 3 to 6. Here, the main pipe 51 is formed with an air passage P for moving the intake air in the longitudinal direction, and is partitioned from the sub pipe 53 by a partition plate 55 having a circular cross section, as shown in fig. 6. The sub pipe 53 is formed with a wire passage in the longitudinal direction on the main pipe 51 by a partition plate 55, and the partition plate 55 has a circular cross-sectional shape having a circular cross-section for the main pipe 51. Meanwhile, as shown in fig. 3 to 6, the inner pipe 5 is formed with a plurality of escape grooves 20 recessed in the circumferential upper surface and arranged in the longitudinal direction, and thus the respective escape grooves 20 are preferably arranged at equal intervals. At this time, as shown in fig. 7, the inner tube 5 is a guide rail 19 which is projected from the upper surface and is formed with a button holder 71 for guiding the lock assembly 7 to be slidable along the center line in the longitudinal direction, and a recess groove 20 is formed in the guide rail 19. As shown in fig. 3, 4 and 6, the inner tube 5 is configured such that the front end is terminated by sandwiching a stopper cover 57 therebetween, and as shown in fig. 8 and 9, the stopper cover 57 is configured such that a padlock projection 77 protruding from the bottom surface of a button holder 71 of the locking unit 7 is padlocked to an upper end corner 59 as described later, whereby the outer tube 3 moving together with the locking unit 7 is stopped at a deployed position where the outer tube 3 is maximally pulled out from the inner tube 5, that is, at a front dead center without further advancement.

Meanwhile, as shown in fig. 3 and 4, the outer tube 3 and the inner tube 5 are fixed to the front end of the outer tube 3 by passing the electric wire 21, which is introduced from the main body through the tube guide 15, through the wire cover 23 at the rear end of the inner tube 5 and passing through the inside of the sub tube body 53, so that the electric wire 21, which is positioned in the inner space S of the outer tube 3 generated in the interval of the distance d, is formed as the expansion part 25 in a spiral shape capable of expanding and contracting at the folded position shown in fig. 3 and 4, that is, the rear dead center of the outer tube 3, in which the front end of the inner tube 5 is positioned on the rear side by the distance d from the front end of the outer tube 3.

Preferably, the upper telescopic portion 25 of the electric wire 21 is supported inside the outer tube 3, and as shown in fig. 3 to 5, a support tube 17 is inserted inside the inner tube 5, so that the support tube 17 is in a folded position, and the front end thereof is fixed to the front end side of the outer tube 3, and the rear end thereof is relatively movably inserted into the inner tube 5 along the inner peripheral surface of the inner tube 5. Accordingly, the support pipe 17 is folded as shown in fig. 3, and the front end thereof is positioned forward of the front end of the inner pipe 5 on the outer peripheral surface to support the expansion/contraction part 25, and the connection pipe 11 is sandwiched between the front ends. In particular, the support pipe 17 is joined to the rear end thereof by sandwiching the seal 27, so that the seal 27 is sandwiched at the front end thereof against the inner circumferential surface of the rear end of the support pipe 17, and the rear end thereof is brought into close contact with the inner circumferential surface of the inner pipe 5, thereby sealing a gap between the inner circumferential surface of the inner pipe 5 and the outer circumferential surface of the support pipe 17.

At the same time, the electric wire 21 entering the pipe guide 15 from the cleaner body is fed in two streams on the electric wire cover 23, but is twisted in one stream in the electric wire cover 23 to enter the sub-pipe 53. At this time, the wire cover 23 is formed by protruding double S-shaped ribs 29 on the bottom surface as shown by C in fig. 6, and thus the wire 21 is clamped by the ribs 29, thereby preventing the wire 21 from being clamped or forcibly removed. As shown in fig. 3 to 5, the electric wire 21 is a suction member which is connected to the front end of the extension tube 1 after the terminal plate 31 detachably attached to the rear end of the connection tube 11 is inserted while being separated into two pieces.

The locking unit 7 is provided on the outer tube 3 through the outer tube wall as a means for locking and unlocking the outer tube 3 and the inner tube 5 in a state of extending or contracting the outer tube 3 and the inner tube 5, and for this purpose, as shown in fig. 3 to 5, includes: a button bracket 71 which is provided to penetrate the outer tube 3 while leaking to the outside, a button cover 73 which covers the coupling of the button bracket 71, and a lock latch 75 which is attached to the center of the button bracket 71 and penetrates the bottom surface of the button bracket 71 to project toward the inner tube 5. Here, the upper locking lock 75 is a lock for fixedly locking the inner tube 3 and the outer tube 5 to each other when padlocked to the escape slot 20 as shown in fig. 7. In contrast, when the user presses the button holder 71 forward or backward through the button cover 73, it is lifted up from the escape groove 20 to be disengaged, thereby allowing the relative movement of the inner tube 5 and the outer tube 3. Meanwhile, the button holder 71 is formed such that a pair of padlock protrusions 77 are protruded on the left and right sides of the bottom surface thereof as described above, and thus, when the rear end of the outer tube 3 is drawn to the front end of the inner tube 5, the padlock protrusions 77 are engaged with the front end of the inner tube 5, particularly, the upper end corner 59 of the stopper cover 57 at the front end thereof, so that the outer tube 3 is not dropped from the inner tube 5.

Now, the function of the telescopic tube 1 according to an exemplary embodiment of the present invention will be described as follows.

When the extension tube 1 of the present invention is in storage, as shown in fig. 3 and 4, when the outer tube 3 and the inner tube 5 are in the folded position, the design of the rear dead center where the outer tube 3 can not move backward any more is optimized in the folded position, and in this position, the lock 75 is latched to the rearmost escape slot 20, so that the inner tube 5 is prevented from moving relatively as long as the lock assembly 7 is not operated.

In this state, when the button cover 73 of the lock assembly 7 is pushed forward, the restriction protrusion 79 having a trapezoidal cross-sectional shape protruding from the bottom surface of the button cover 73 is disengaged from the upper surface of the lock latch 75. At the same time, the button holder 71, which is pressed by the button cover 73 through the rear spring 81, presses the lock latch 75 forward, and the lock latch 75 is pushed up along the inclined surface of the escape groove 20 by the inclined surface at the lower end, and is retracted into the escape groove 20 to release the padlock. At this time, the escape groove 20 is preferably formed in a circular shape on a plane as shown in fig. 6 so as to have a concave shape like a truncated cone as a whole. Thus, it is also preferable that the lock 75 have a truncated cone shape at its lower end as shown in fig. 5.

Thereafter, when the outer tube 3 is further pushed, as shown in fig. 4, the lock 75 is locked in the forward-most escape slot 20, and the extension tube 1 reaches the maximum length that can be fixed, and when it is further pushed forward by a large amount, it reaches the front dead point described above and stops further advancing by more than a large amount. However, when the lock latch 75 is latched to the foremost escape groove 20 and the hand is released from the button cover 73, the restoring force of the compressed rear spring 81 returns to the intermediate position where the button cover 73 and the button holder 71 are aligned in the vertical direction, the lock latch 75 is pressed again by the restricting projection 79, and the lock latch 75 cannot be separated from the foremost escape groove 20 any more, so that the state where the outer tube 3 is fixed to the inner tube 5 is maintained in the most advanced state. At this time, as shown in fig. 4, the tip of the extensible part 25 is caught by the tip of the outer tube 3, but the extensible part 25 is elongated and can correspond to the movement of the inner tube 3. At the same time, since the support pipe 17 is hooked by the hook hole 33 at the front end thereof to the hook 35 at the rear end of the connection pipe 11, the outer pipe 3 advances together as described above, and the telescopic part 25 is supported so as not to hang down as shown in fig. 4.

In this way, when the vacuum cleaner is started in the extended state, the vacuum negative pressure on the main body side strongly sucks the external air together with foreign substances such as dust from the suction member. At this time, the sealing between the support pipe 17 and the main pipe body 51 is achieved not only by the support pipe 17 being separated from the air passage P but also by the sealing member 27, and the support pipe 17 further not only enables the electric wire passage of the sub pipe body 53 to be isolated from the air passage P but also seals the main pipe body 51, that is, between the inner pipe 5 and the outer pipe 3.

Meanwhile, when the telescopic tube 1 is stored or the extended length of the telescopic tube 1 is shortened after use, the button cover 73 is pressed to travel backward together with the outer tube 3, and the lock 75 is latched to the other escape groove 20 on the rear side to fix the outer tube 3 to the inner tube 5, similarly to the above-described advancing.

1: telescopic pipe 3: outer pipe

5: inner tube 7: locking assembly

11: connecting pipe 12: end cover

13: clamp 15: pipe guide

17 supporting tube 20 avoiding groove

21: wire 23: wire cover

25: expansion part 27: sealing member

31 terminal plate 51 main tube

53 auxiliary pipe body 55 partition plate

57 stop cover 71 button support

73 button cover 75 locking lock

77 padlock protrusions 81 spring

P is an air passage.

Claims

1. An electric wire built-in extension tube is characterized by comprising; an outer tube; an inner tube movably inserted into the outer tube and having a plurality of escape grooves formed in a longitudinal direction on an outer circumferential surface thereof; and a locking assembly which is arranged by penetrating the wall surface of the outer pipe, so that the outer pipe and the inner pipe are mutually fixed and locked when the padlock is hung in the avoiding groove; the inner tube is composed of a primary tube body forming an air passage in the longitudinal direction and a secondary tube body forming an electric wire passage in the longitudinal direction, the secondary tube body being partitioned from the primary tube body by a partition plate.

2. The telescopic tube for incorporating electric wires according to claim 1, wherein an electric wire is housed so as to be fixable to a front end of the outer tube through the sub-tube from a rear end of the inner tube, the front end of the inner tube is positioned on a rear side of a distance d from a front end of the outer tube in a folded position, and the electric wire is formed into a telescopic portion which is telescopic in a space corresponding to the distance d.

3. The extension tube for electric wire according to claim 2, comprising: and a support tube having a front end fixed to a front end side of the outer tube and a rear end relatively movably arranged along the inner tube, and supporting the expansion/contraction portion by an outer peripheral surface.

4. The extension tube for incorporating an electric wire as claimed in claim 3, wherein said support tube comprises: and a sealing member coupled to a rear end thereof to seal a gap generated between the sealing member and an inner circumferential surface of the inner pipe, and a front end thereof is located at a front side of a front end of the outer pipe.

5. The telescopic wire-incorporating tube of claim 1, wherein the locking assembly comprises: and a padlock protrusion protruding from the bottom surface of the padlock protrusion toward the inner tube, so that when the rear end of the outer tube is drawn out to the front end of the inner tube, the padlock is locked at the front end of the inner tube, and the inner tube and the outer tube are prevented from being separated.