KR100416160B1 - Pipe for electric vacuum cleaner and method of making the same - Google Patents

Abstract

Provided are pipes used in an exhaust reflux vacuum cleaner and a method of manufacturing the same, which can be manufactured at a light weight and at a low cost.

The vacuum cleaner pipe of the present invention is a pipe (1) used in an exhaust reflux type vacuum cleaner for returning exhaust gas from a cleaning main body to a suction mechanism, and includes an outer pipe (2) and an outer pipe (2). It consists of an inner pipe (inner pipe) 3 is arranged, the inner pipe (3) is a pipe for an electric vacuum cleaner is formed by being fixed to the inner wall surface of the outer pipe (2).

Description

PIPE FOR ELECTRIC VACUUM CLEANER AND METHOD OF MAKING THE SAME}

TECHNICAL FIELD The present invention relates to a vacuum cleaner pipe and a method for manufacturing the same, and more particularly, to a pipe used for an exhaust reflux type vacuum cleaner that can be manufactured at a low cost and at a low cost, and a method for manufacturing the same.

Conventionally used vacuum cleaners draw outside air together with dust and garbage from the suction mechanism, collect the dust and garbage in a dust bag inside the cleaning body, and exhaust the outside to the outside of the cleaning body and the like.

However, the exhaust from such a cleaning main body causes discomfort to those around them, and various kinds of vacuum cleaners have been proposed to eliminate such exhaust.

For example, there is an exhaust reflux vacuum cleaner for returning the exhaust from the cleaning body to the suction device, and in such exhaust reflux vacuum cleaner, a double pipe or hose between the cleaning body and the suction device allows intake and exhaust to flow simultaneously. It is structured.

10 to 11 show pipes used for the exhaust reflux type vacuum cleaner which have been proposed in the related art.

The pipe 31 is manufactured by integrally molding the outer pipe part 32 and the inner pipe part 33.

In this pipe 31, one of the space 34 inside the inner pipe 33 and the space 35 between the outer pipe 32 and the inner pipe 33 is either an intake passage and the other. Used as exhaust reflux passage.

In the case of manufacturing the pipe 31 having such a double structure, the intermediate portion for forming the two spaces 34 and 35 is formed from the part line 36 at the pipe 31 side end thereof. By moving to the side end on the opposite side, the spaces 34 and 35 as shown in Figs. 10 to 11 can be formed.

10, the opening part 37 is formed in the outer peripheral surface of the outer pipe part 32, in order to smoothly move the intermediate part for forming the space part 35 which shows a complicated shape.

The opening part 37 supports the intermediate part at the time of shaping | molding, and is closed by the cover 38 after shaping | molding.

However, since the said conventional pipe 31 is manufactured by integral shaping | molding, the omission margin is necessary on the structure of a metal mold | die.

In order to obtain such a clearance gap, both the outer pipe part 32 and the inner pipe part 33 become thick, so that the weight is inevitably heavy.

Therefore, the weight reduction of the pipe for the improvement of operability, cost reduction, etc. could not be expected.

Moreover, the cover 38 which closes the opening part 37 after shaping | molding the pipe 31 was not necessary for the intake / exhaust function of the pipe 31 original, and made cost reduction difficult.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a pipe used in an exhaust reflux vacuum cleaner and a method of manufacturing the same, which can be manufactured at a light weight and low cost.

BRIEF DESCRIPTION OF THE DRAWINGS The top view of the vacuum cleaner pipe which is one Embodiment of this invention.

Fig. 2 is a longitudinal sectional view of the pipe for the vacuum cleaner of Fig. 1.

3 is a cross-sectional view taken along the line III-III of FIG. 2.

4 is a plan view of the inner pipe of FIG.

5 is a longitudinal sectional view of the inner pipe of FIG. 4;

6 is a cross-sectional view taken along the line VI-VI of FIG. 5.

7 is a plan view of the outer pipe of FIG.

8 is a longitudinal sectional view of the outer pipe of FIG.

9 is an explanatory view of a cross section showing a state of a manufacturing process of the pipe for vacuum cleaner of FIG. 1;

10 is a cross-sectional view of a conventional vacuum cleaner pipe.

FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10; FIG.

(Explanation of symbols for the main parts of the drawing)

1: pipe 2: outer pipe

3: inner pipe

The vacuum cleaner pipe of the present invention is a pipe used in an exhaust reflux type vacuum cleaner for refluxing exhaust gas from a cleaning main body to a suction device, and is composed of an outer pipe and an inner pipe disposed in the outer pipe. It is characterized by being fixed to the inner wall surface of the outer pipe.

At least both end portions of the outer pipe and the inner pipe are preferably formed over the entire circumference.

A cutout or an opening is formed in a part of the outer pipe, and a coupling protrusion protrudes from a portion of an outer circumferential surface of the inner pipe, and the coupling protrusion is fitted into the cutout or opening so that the inner pipe is externally connected. It is preferable to adhere to the inner wall surface of the pipe.

In addition, it is preferable that the space portion between the outer pipe and the inner pipe is configured as an exhaust reflux passage.

The method for manufacturing a pipe for an electric vacuum cleaner according to the present invention is a method for manufacturing a pipe for use in an exhaust reflux type vacuum cleaner for refluxing exhaust from a cleaning main body to a suction device, wherein the inner pipe and the outer pipe are manufactured separately, and the inner pipe Is fixed to the inner wall surface of the outer pipe.

(Example)

Hereinafter, the electric vacuum cleaner pipe of the present invention and a manufacturing method thereof will be described in detail with reference to the drawings.

1 is a plan view of a pipe for an electric vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of the pipe for the vacuum cleaner of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is an interior of FIG. 5 is a vertical sectional view of the inner pipe of FIG. 4, FIG. 6 is a sectional view of the VI-VI line of FIG. 5, FIG. 7 is a top view of the outer pipe of FIG. 1, and FIG. 8 is a vertical sectional view of the outer pipe of FIG. 7. 9 is a cross-sectional explanatory view showing a state of a manufacturing process of the pipe for the vacuum cleaner of FIG.

The vacuum cleaner pipe 1 shown in FIGS. 1-3 is a pipe used for the exhaust reflux type vacuum cleaner which returns the exhaust from a cleaning main body to a suction mechanism, and the external pipe 2 manufactured separately, respectively, It consists of the inner pipe 3 arrange | positioned inside the outer pipe 2.

The pipe 1 has a double structure by fixing the inner pipe 3 to the inner wall surface of the outer pipe 2.

In this way, by forming the outer pipe 2 and the inner pipe 3 separately, the thickness of the outer pipe 2 and the inner pipe 3 can be formed thinly, respectively.

In particular, when the inner pipe 3 is manufactured by blow molding, the effect is greatly reduced.

Although the outer pipe 2 and the inner pipe 3 can be made of various materials, for example, both the outer pipe 2 and the inner pipe 3 appear to the outside, so that the external finish state (gloss) And the like, and a considerable force is applied to the entire pipe 1 by an operation during cleaning, and therefore, an ABS resin or the like, which is a material having high strength, is preferable.

In addition, when the outer pipe 2 and the inner pipe 3 are joined by ultrasonic welding or the like, ABS resin is preferable even in view of workability at that time.

In addition, as the other material, since the pipe 1 is composed of a double structure consisting of the outer pipe 2 and the inner pipe 3, the polypropylene resin can be used to reduce the weight of the pipe 1 and to reduce the cost. You may use it.

Moreover, since the pipe 1 of this embodiment is formed in the vicinity of the both ends (refer 4 and 5 of FIG. 2) of the outer pipe 2 and the inner pipe 3 over the perimeter, the structure is simple. Enough strength can be obtained.

In the pipe of the present invention, sufficient strength can be obtained if at least both end portions of the outer pipe and the inner pipe are formed over the entire circumference, but the present invention is not limited thereto, and the outer pipe 2 will be described later. The opening 6 may be omitted, and the vicinity of the center of the outer pipe 2 may also be formed over the entire circumference, in which case the strength of the pipe is further improved.

In the pipe 1 of this embodiment, as shown in FIGS. 7-8, the opening part 6 is formed in the vicinity of the center part of the outer pipe 2, and as shown in FIGS. 4-6, the outer peripheral surface of the inner pipe 3 is shown. The engaging projection 7 protrudes in the vicinity of the center part of the.

Therefore, as shown in Fig. 9, the inner pipe 3 is inserted into the outer pipe 2 and is pushed upward, and the opening of the outer pipe 2 is caused by the elastic deformation of the inner pipe 3. Since the engaging projection 7 of the inner pipe 3 can be fitted to (6), the inner pipe 3 can be easily and reliably fixed to the inside of the outer pipe 2 in the front, rear, and up and down directions. .

In addition, in the present invention, the fixing method of the outer pipe and the inner pipe is not limited to the coupling between the opening and the engaging protrusion, and various fixing methods may be employed as long as the fixing force can withstand the use. Also good.

For example, instead of an opening part, the notch may be formed in the both ends of an inner pipe, and this notch may be engaged with the engaging protrusion.

As another fixing method, fixing by screws or fixing by ultrasonic welding may be used.

Moreover, as shown in FIG. 3 and FIG. 6, the engaging projection 7 of the inner pipe 3 has a shape which spreads in the circumferential direction as it goes upward.

Therefore, when fitting into the opening 6 of the engaging projection 7, the projections 7a on both sides representing the wedge-shaped cross section of the engaging projection 7 are firmly coupled to the circumference of the opening 6. The inner pipe 3 does not fall off from the outer pipe 2, and the sealing property is also improved.

As the pipe 1 has a double structure, as shown to FIGS. 1-3, since the space part 8 inside the internal pipe 3, and between the outer pipe 2 and the inner pipe 3 are shown, FIG. It has a space 9, and one can be used as an intake passage and the other as an exhaust reflux passage.

Comparing the space portion 8 and the space portion 9, the space portion 9 has a more complicated shape than the space portion 8 and communicates with the opening 6.

Therefore, when the space 9 is an intake passage, dust is more likely to be filled than when the space 8 is an intake passage, and there is a problem such as sealing property.

Therefore, in order to avoid such a problem, it is preferable to use the space portion 8 as the intake passage and use the space portion 9 as the exhaust reflux passage.

In addition, as shown in FIG. 3, since most of the air flows through a large area under the space 9 in the space 9, the gap between the opening 6 and the engaging projection 7 is highly high. No sealing is required.

According to the present invention, since the thickness can be made thinner compared to the exhaust reflux pipe manufactured by the conventional integral molding, it is possible to manufacture an extremely light and inexpensive pipe. In addition, the inner pipe and the outer pipe can be easily combined. At the same time, it is possible to maintain the tightly coupled state so that the inner and outer pipes do not fall off.

In addition, since the outer pipe and the inner pipe are separately manufactured, there is no need for a hole for supporting the intermediate portion or a cover for closing the hole, so that it can be manufactured at low cost.

Claims (5)

Pipe used in the exhaust reflux type vacuum cleaner for returning the exhaust from the cleaning base to the suction mechanism, It consists of an outer pipe and an inner pipe disposed in the outer pipe, The inner pipe and the outer pipe are manufactured separately, An opening is formed in a portion of the outer pipe, and a coupling protrusion protrudes from a portion of the outer circumferential surface of the inner pipe. The inner pipe is fixed to the inner wall surface of the outer pipe by the coupling protrusion is coupled to the opening, characterized in that the pipe for the vacuum cleaner. The method of claim 1, At least both end portions of the outer pipe and the inner pipe are formed over the entire circumference of the electric vacuum cleaner pipe. delete The method according to claim 1 or 2, And a space portion between the outer pipe and the inner pipe is an exhaust reflux passage. A method for manufacturing a pipe used in an exhaust reflux vacuum cleaner for refluxing exhaust from a cleaning base to a suction device, Inner pipe and outer pipe are manufactured separately, An opening is formed in a portion of the outer pipe, and a coupling protrusion protrudes from a portion of the outer circumferential surface of the inner pipe. And the coupling protrusion is fitted into the opening to fix the inner pipe to the inner wall surface of the outer pipe.