KR200209745Y1 - A length control device for a telescopic extension pipe of vacuum cleaner - Google Patents

Abstract

The present invention is stable to external shocks by adjusting the inner pipe and out pipe constituting the suction extension pipe for the vacuum cleaner to the desired length quickly and safely when telescopic operation is made to the desired length. Another object of the present invention is to provide a length adjusting device of a suction extension tube for a vacuum cleaner, which enables the length adjusting function by hand.

Inner pipe (4) having a plurality of concave-type locking groove (2) at the upper side, and the concave-shaped guide groove (3) in the lower direction and the inner pipe (4) so that it can be fitted in a sliding manner The guide pipe 7 having the guide rails 5 formed on the inner edge thereof is fitted into the binding groove 16 and the binding hole 16a on the out pipe 8, and the upper edge of the outer edge of the guide pipe 7 is fixed. There is a stopper binding groove 14 in the circumferential direction of, and a projection 12 is formed in the axial direction of the lower edge of the outer edge. After interposing the stopper 15 in the stopper engagement groove 14 for the stopper guiding action, the slide projection 15a of the stopper and the slide base 6 are interlocked together. An oblique slide indentation groove 9 is formed in the inner surface portion of the slide base 6 that is engaged, and engages sliding operation with the slide protrusion 15a of the stopper 15, while the lower portion of the guide pipe 7 On the surface, the coil spring 11 is elastically installed before and after the protrusion 12 so that the guide pipe 7 is biased by the spring tension so that the outer cap 18, the inner cap 17, and the cover 10 have their exterior bodies. It is a configuration installed.

Description

A length control device for a telescopic extension pipe of vacuum cleaner}

The present invention relates to a length adjusting device of a suction extension tube for a vacuum cleaner, and more particularly, an inner pipe and an outer pipe constituting the vacuum suction suction extension tube have a desired length by telescopic operation. It is stable to external impact by adjusting it to the desired length quickly and safely when it is stretched, and it is possible to provide the length adjusting device of the suction tube for the vacuum cleaner that allows the user to adjust the length with only one hand holding the grip. It is.

According to the general structure of the length adjusting device of the suction extension tube for a vacuum cleaner according to the related art, a series of fasteners (hereinafter referred to as 'stoppers') formed in the inner pipe, which are fitted in the guide pipes bound to the outpipe and the inner pipe, are formed in the inner pipe. In the case of adjusting the length of the outpipe and the inner pipe while mutually binding and dismantling the locking grooves, the methods for disassembling, binding and restoring the stopper are US5,941,575, US5,692,782 and US5,332,266. It is presented in various ways in the technology.

In particular, the control devices DE 19735273A1, DE 19738194C1, and EP 0552481A1, DE 4101049A1, which have a structural feature, have a stopper dismantling force.

However, even though the stopper forms a removal groove and a binding action with the engaging groove formed in the inner pipe by the various methods described above, this structure basically exerts an external force on the stopper fixing clamp that binds the inner pipe and the out pipe. By acting, the stopper bound to this leads to the dismantling area formed in the upper direction and induces the lifting and dismounting movement of the stopper.

In addition, the detachable stopper is configured to extend and extend the pipe length in such a manner as to ride over the stopper engaging grooves formed in the inner pipe on the center axis of the engaging groove.

That is, the conventional stopper dismantling and binding system places many restrictions on the shape of the locking groove and the shape of the stopper formed on the inner pipe. In other words, in order to make it easy to adjust the length of expansion and contraction, the indentation angle of the locking groove must be large, and the locking groove and the stopper coupling part must have a curved portion to induce the binding action to be fast and stable when seated on the locking groove. The mutual interference should be minimized.

However, in such a structure, when the stopper is bound, the pipe fastening force (hereinafter referred to as 'pressure input') by the stopper often causes the stopper control part to detach easily even at a small impact, causing a change in length. Due to the wear of the stopper and the locking groove, the pressure input may be lowered, resulting in a loss of functionality.

In the telescopic adjustable tube, as described in DE 19706210 and US Pat. No. 5,692,782, in order to compensate for the disadvantages of the pressure input as described above, the stopper is bound to a plurality of grooves at the same time and the shape of the groove with respect to the direction in which external force acts on the extension tube. There are many ways to make it stable and to make the stopper come out smoothly when dismantling, but its configuration is complicated and the failure rate is high. In addition, the above-described methods have a structural limitation in dramatically increasing the pressure input of the pipe by forming a curved portion at the binding portion in such a manner that the dismantling region of the stopper is formed on the upper portion thereof.

There are Korean Patent Application No. 2000-34330 and Korean Utility Model Registration Application 2000-17678 of the present inventors, in which the stopper and the inner pipe binding principle are removed from the conventional vertical removal method, and the stopper slides linearly. However, in this method, the external force applied to the grip should be added as the rotational torsion force in order to induce the linear sliding motion of the stopper to the dismantling area.

In addition, a common method of the conventional telescopic extension tube adjusting device is to pressurize the stopper with one hand, to maintain the stopper dismantling zone, and to push or pull the outpipe or inner pipe with the other hand to achieve a stretch action. There was inconvenience in operation.

Therefore, in the present invention, as described above, to solve the problems of the conventional vacuum suction extension tube,

First, the novel method of moving along the longitudinal direction of the stopper binding groove by deviating from the upper stopper dismantling area application method, which is a top-down detachable method of the stopper, which is widely applied to the stopper control device of the conventional telescopic suction extension pipe. The present invention provides a structure capable of maximally increasing the pressure input of the suction extension pipe that is engaged with the stopper.

Secondly, when the vacuum cleaner suction extension tube is stretched, the force acting on the regulating grip causes the stopper to act directly on the stopper for dismantling the stopper, providing the disassembly area quickly and simultaneously adding force continuously to the pipe telescopic It is designed so that the pipe stretching action can be made more quickly and smoothly by one hand holding the grip to act in the axial direction corresponding to the motion.

Third, the technical problem to be achieved by the present invention is to assemble in the manufacturing process and to present a simple structure with a low incidence rate and a failure rate in use, thereby increasing the price competitiveness by reducing the manufacturing cost and increasing the industrial availability. In addition, the present invention has completed the present invention with the technical problem in providing a simple suction extension tube structure that can further improve the ease of use of the vacuum cleaner.

1 is an exploded perspective view showing a preferred embodiment of the present invention

2 is an assembled state cross-sectional view of a preferred embodiment of the present invention

Figure 3 is a cross-sectional view showing the length adjustment in the suction extension tube of the present invention

3A is a cross-sectional view taken along line A-A of the present invention

4 is a cross-sectional view showing a state in which the length is reduced in the suction extension tube of the present invention

4A is a cross-sectional view taken along line B-B of the present invention

5 is a cross-sectional view showing an extended length in the suction extension tube of the present invention

5A is a cross-sectional view taken along line C-C of the present invention

Figure 6 is a perspective view showing some other embodiments of the inner pipe in the present invention

■ Explanation of symbols used in main part of drawing ■

1: Length adjusting device (of suction tube for vacuum cleaner)

2: hanging groove 3: guide groove

4: inner pipe 4a: protrusion

5: guide rail 6: slide base

7: Guide Pipe 8: Outer Pipe

9: Slide Groove 10: Cover

11: Spring 12: protrusion

13: Space 14: Stopper Guide Groove

15: Stopper 15a: Slide Protrusion

16: binding groove 16a; Binding

17: Inner Cap 18: Outer Cap

G: Grip

Configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing a preferred embodiment of the present invention, Figure 2 is a cross-sectional view of the coupling state of the present invention, Figure 3, 4, 5 is a cross-sectional view showing the operation state of the present invention, etc.

The length adjusting device 1 of the suction extension pipe for a vacuum cleaner provided in the present invention has a plurality of concave recessed grooves 2 at an upper portion at predetermined intervals as shown, and a concave guide groove 3 in a longitudinal direction at a lower portion thereof. The inner pipe (4) having a) and a guide pipe (7) having a guide rail (5) formed at its inner edge so as to be slide-fitted into the inner pipe (4) on the out pipe (8). The fitting 16 is fitted into the groove 16 and the binding port 16a. A stopper binding groove 14 is formed in the circumferential direction of the upper edge portion of the guide pipe 7, and a protrusion 12 is formed in the axial direction of the lower edge portion of the guide pipe 7. The stopper binding groove 14 for the stopper guiding action is interposed between the slide protrusion 15a and the slide base 6 of the stopper after the stopper 15 is interposed therebetween. An oblique slide recess groove 9 is formed in the inner surface portion of the slide base 6 that is engaged, and engages sliding operation with the slide protrusion 15a formed on the upper surface of the stopper. The lower surface of the coil spring 11 is elastically installed before and after the protrusion 12 so that the guide pipe 7 is biased by the spring tension, and the outer cap 18, the inner cap 17, and the cover 10 have an appearance. It is a configuration in which a sieve is installed.

That is, the inside of the grip G, which is an outer body composed of the out cap 18, the inner cap 17, and the cover 10, includes a slide base 6, a stopper 15, a spring 11, and a guide pipe ( The components consisting of 7) are interlocked and built to function to adjust the length of the inlet extension pipes intermittently interlinking the inner pipe 4 and the out pipe 8.

The shape of the stopper 15 according to the present invention is a polyhedral shape in which the slide protrusion 15a is formed on the upper side so as to be suitable for the sliding motion. In addition, the slide protrusion 15a of the stopper 15 is in close contact with the slide groove 9 formed in the slide base 6 to be in close contact with the sliding movement, and the body of the stopper has a locking groove of the inner pipe 4 ( 2) is assembled so as to be in contact on the engaging groove (2) to make an induction sliding motion, the slide groove (9) is formed in a diagonal direction when viewed in the movement direction of the grip (G), the grip (G) It is configured to act on the stopper by converting the reciprocating linear motion added by the working external force into the circumferential motion perpendicular thereto.

That is, as described above, the main body of the present invention is configured to induce acting in a direction perpendicular to the direction of the force initially applied to the grip G for dismantling the stopper 15, and the stopper reaches the stopper dismantling area. After this, the force continuously applied to the grip G is applied to the out pipe 8 so that the telescopic length stretching of the extension pipe is made.

That is, the present invention is dismantled by the circumferential movement of the locking groove 2, rather than the manner of passing over the upper portion of the locking groove 2 of the inner pipe 4 by providing the upper release area of the stopper, which is a conventional stopper dismantling principle. As a novel way of providing an area, the advantage is that, firstly, it is not necessary to have a curved curved portion at the connection portion so that the stopper shape or the shape of the locking groove can have a very high pressing force. The indentation angle with a high pushing force can be formed in the shape of the locking groove 2 and the stopper 15 so that a movement in the longitudinal direction of 14 may be performed in the stopper binding groove 14 well. That is, the shape of the connection engagement portion between the engaging groove 2 and the stopper 15 which forms a binding action can make a sharp inclination, and the pressure input can be significantly increased.

By the above-mentioned main idea, the plurality of locking grooves 2 formed on the inner pipe 4 circumference to which the stopper 15 is bound are composed of a series of press grooves having a predetermined interval on the circular pipe. The shape of the locking groove 2 formed on the circumference of the locking groove 2 symmetrically decreases as the distance from the center of the locking groove 2 symmetrically, almost at both ends of the locking groove (2) It can be seen that it cannot function as.

That is, the stopper 15 positioned at the end of the locking groove 2 is moved to a safety zone that is free from interference of the locking groove 2, and at this time, a continuous external force is applied to the grip G or an inner By applying an additional external force to the pipe 4 or the outpipe 8, it is possible to quickly adjust the telescopic suction extension tube length.

In addition, the inner pipe 4 of the present invention is applicable to an embodiment in which the engaging grooves 2 are formed at predetermined intervals in a circular pipe having the protrusions 4a as shown in FIG. 6. Protruding binding groove shape of the inner pipe is a unique shape that can not be applied in the vertical movement or upper dismantling area providing method of the conventional stopper can be applied to the main body according to the present invention can significantly increase the pressure input.

In addition, the above-described configuration is made to correspond to the interval between the engaging grooves 2 of the inner pipe 4, so that a plurality of stoppers 15 are built in and the stopper binding grooves 14 and the slide grooves 9 are guide pipes, respectively. A plurality of stoppers (7) and the stopper on the slide base (6) may be formed (not shown), and the cover 10 may also be formed in a separate coupling type instead of an integral type.

Hereinafter, the principal of the present invention will be described in more detail with the principle of its operation.

When the cleaner user presses the grip G according to the present invention with one hand to stretch and operate the suction extension tube in the longitudinal direction, the initial external force is pushed or pulled in the grip G axis direction. The external force added in the axial lower or upper direction by the grip G operation causes the slide base 6 bound inside the grip to linearly move in the axial direction.

A slide groove 9 is formed on the inner surface of the slide base 6 in the axial direction, and the stopper 15 having the slide protrusion 15a is interlocked with the groove, and the slide base 6 is formed. An axial external force added to the stopper 15 is transmitted to the stopper 15 in an axial oblique direction so that the motion acts on the stopper 15 in the circumferential direction which is a direction perpendicular to the axis. That is, the stopper 15 is interposed in the engaging groove 2 formed on the inner pipe 4, and the external force induced by the diagonal slide groove 9 to the stopper 15 is a stopper binding groove ( 14) and the inner pipe engaging groove (2) is guided along the wall to make a circumferential clockwise or counterclockwise movement.

When the linear movement of the grip G ends, that is, when the slide projection 15a of the stopper 15 reaches the end of the slide groove 9 formed in the slide base 6, the stopper 15 is the stopper binding groove. The stopper 15 is completed at the end of the longitudinal direction at this time, and the stopper 15 is a time point for providing the dismantling area for the stopper binding groove 14.

The surface of the locking groove 2 and the stopper is inclined in the lateral direction as shown in FIGS. 4A and 5A to provide a complete dismantling area of the inner pipe.

After providing the dismantling area, the out pipe 8 passes through a plurality of catching grooves 2 of the inner pipe 4 by a predetermined axial upward or downward axis motion which is successively added to the grip G. The center of gravity is biased by the tension of the coil spring 11 which is elastically installed in the front and rear direction about the center of the guide pipe 7 and the lower center projection 12 of the guide pipe 7. As soon as the return to the position, the stopper 15 also returns to the center of the inner pipe engaging groove 2, which is the initial position, and a fastening action is performed.

In addition, there is a reason to look at the shape of the stopper 15 and the slide base 6 closely related to the shape of the locking groove 2 in order to understand the operation of the present invention more accurately.

The shape of the stopper 15 has a multi-sided three-dimensional shape. The stopper 15 has a planar end in the longitudinal direction and an inclined portion 15b of an oblique plane in the height direction to form a slide projection 15a at the upper end. On the other hand, the slide base has a slide groove 9 formed in a diagonal shape when viewed from the grip G operating direction, and has a plateau-type symmetrical shape in which the wall surface of the groove of the central region is high and lowers toward the edge. .

The stopper 15 is a main point that the axial movement is converted into the circumferential movement by the interaction between the slide projection 15a and the slide groove 9 of the slide base 6. On the other hand, the diagonal inclined portion 15b formed on the stopper is configured to return quickly by interacting with the wall of the locking groove 2 of the inner pipe 4 when moving the dismantling area of the stopper, and to minimize the interference of the extension pipe. to be.

Further, the shape of the wall of the plateau-shaped symmetrical slide groove 9 acts on the slide projection 15a forming surface of the stopper so that the stopper 15 smoothly performs the circumferential motion on the guide pipe 7.

When the external force acting on the grip G moves the stopper 15 to the outside of the locking groove 2 to provide a dismantling area, a force for pushing or pulling the pipe in the direction of travel of the external force applied first occurs. It may continue to work to reach the desired extension tube length. At this time, when the nozzle unit is connected to the ground and the cleaner is being used, the length adjusting function can be smoothly performed continuously by one hand holding the grip G.

The present invention is not limited to the above-described embodiments and the accompanying drawings, and applied to other fields than the telescopic pipe length adjusting device for vacuum cleaners without departing from the technical spirit of the present invention. And it will be apparent to those of ordinary skill in the art that modifications and variations are possible.

Furthermore, as described in detail above, the length adjusting device of the suction extension tube for the vacuum cleaner provided in the present invention adopts a method of moving the stopper 15 along the longitudinal direction of the locking groove 2 formed in the inner pipe 4. As a result, the pressure input of the suction extension pipe which is bound with the stopper 15 can be increased to the maximum, and the force applied to the adjusting grip G when the length of the suction extension pipe is extended and extended stops directly for the stopper 15 dismantling action. And (15) to provide the dismantling area quickly, while continuously applying force to coincide with the telescopic movement of the pipe so that the pipe stretching action can be made more quickly and smoothly by one hand holding the grip (G). Its simple assembly during manufacturing minimizes the occurrence of defects and failures during use, and reduces cost competitiveness by reducing manufacturing costs. It is that the expected effects in the stomach can be devised for .

Claims (5)

Inner pipe (4) having a plurality of engaging grooves (2) and the concave guide groove (3) in the longitudinal direction at predetermined intervals, and the guide rail (5) to which the inner pipe (4) is slide-fitted And a guide pipe 7 fixed to the outpipe 8 and the binding groove 16 formed at one end of the outpipe 8, The guide pipe (7) forms a stopper binding groove (14) in the upper outer periphery and interposes the stopper (15) along the groove so as to linearly move, and then the slide base (6) in which the diagonal slide groove (9) is formed. To bond tightly, On the other hand, the inner space portion 13 of the grip G, which is formed when the cover 10 is assembled when the cover 10 is interposed between the spring 11 and the front and rear by forming the protrusion 12 in the axial direction at the lower end of the guide pipe 7. Elastic installation on the The stopper binding groove 14 formed on the guide pipe 7 by the grip G operation has one end connected to the slide groove 9 of the slide base 6 and the other end of the inner pipe 4 being caught by the other end. The stopper 15 is engaged with the selected locking groove 2 of the grooves 2 so that the stopper 15 moves in an arc on the stopper binding groove 14 with respect to the longitudinal motion of the grip G. Length adjustment device of the suction extension tube for vacuum cleaners, characterized in that the length of (4) to be interrupted. The suction pipe according to claim 1, wherein the inner pipe (4) has a recessed groove (2) of concave shape at predetermined intervals in a circular pipe having a projection (4a) in the longitudinal direction. Regulator. The vacuum according to claim 1, wherein the stopper 15 has a polyhedral shape having a slide protrusion 15a formed on an upper surface thereof, and a diagonal slope 15b is formed on both end surfaces of the longitudinal direction in a height direction. Length adjusting device of the suction extension pipe for the cleaner. 2. The slide base (6) according to claim 1, characterized in that the slide base (6) forms an oblique slide groove (9) in its inner surface, and the groove wall surface portion has a plateau-like symmetric shape that is high in the central region and lowers toward both ends. Length adjusting device of the suction extension tube for vacuum cleaner. The guide pipe (7) and the slide base (6) according to claim 1, the stopper binding groove (14) and the slide groove (9) and the guide pipe (7), respectively, so as to interlock with the plurality of stoppers (15). Length adjusting device of the suction extension tube for the vacuum cleaner, characterized in that formed on the slide base (6) a plurality.