JPS5830040Y2 - Vacuum cleaner hose end joint tube - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an end joint tube for a vacuum cleaner hose.

The normal way to use a vacuum cleaner is to combine a hose with an extension pipe and connect the floor suction port to the end of the extension pipe, but recently a three-stage extension pipe has appeared. .

In the case of a normal two-stage telescopic extension tube, the proximal side has a tapered part that tapers into the inner surface of the hose end joint tube.

The connection parts of the floor suction port and gap suction port also have tapered parts with the same dimensions as the proximal side of the extension pipe, so in some cases, the extension pipe in the middle can be omitted and the suction ports can be connected directly to the hose end fitting pipe. It can also be fitted and cleaned.

However, in the case of a three-stage telescopic extension pipe, the diameter of the outermost pipe is larger than that of a two-stage telescoping type, so it is difficult to narrow down the proximal side to the same size as the connection part of the suction port, As shown in hypothetical example A in Fig. 7, even if the outermost tube is narrowed to form a tapered part A, the inner pipe will not fit into this tapered part A, so in the end, only the amount of the tapered part A will fit. It would have to protrude extra, which would defeat the purpose of making it telescopic in three stages to increase the amount of contraction.

Therefore, in reality, as shown in the example shown in Fig. 8, the proximal side of the outermost tube is made into an outwardly expanding tapered part that fits on the outside of the hose tip tube, and the ends of the intermediate tube and the innermost tube are inserted into the proximal side of the outermost tube. This allows for easy positioning and avoids unnecessary length.

In this case, since there is a large difference between the diameter of the suction port, the diameter of the three-stage telescopic extension pipe, and the diameter of the hand pipe, when tapered parts are formed on the outer and inner surfaces of the hose end joint pipe, the wall thickness of both tapered parts is There is a problem that a large sinkage occurs and air leaks occur when the suction port or extension pipe is fitted.

The present invention is compatible with such a three-stage telescopic extension pipe, and
Furthermore, the present invention provides a hose end connecting pipe with a novel structure that allows direct connection of suction ports as in the past.One embodiment of this will be described below with reference to FIGS. 1 to 6.

1 is the vacuum cleaner main body, 2 is a hose connected to the main body 1,
Reference numeral 4 denotes a joint tube bent into an F-shape, which is attached to the grip portion 3 at the end of the hose.

An opening 5 is provided in the middle of the joint pipe 4, and on the outside thereof,
A well-known suction force adjustment ring 6 is attached to open and close the opening 5 to adjust the suction force.

The tip of the joint tube 4 is slightly swollen to form an expanded portion 7, and a fitting taper portion 8 is formed on its outer surface.

The tapered part 8 has a dimension to fit a light-spreading tapered part 10 formed on the proximal side of the three-stage telescoping extension tube 9, and several annular grooves 11 are formed in order to improve adhesion. There is.

In the present invention, a light-spreading tapered part 12 is formed inside the expansion part 7.

In the embodiment, three axial ribs 13 are formed on the inner surface of the inflatable portion 7, and the inner envelope surface thereof constitutes the tapered portion 12.

The tapered portion 12 continues deeper than the rib 13 and forms an annular airtight fitting portion 14.

The tapered part 12 has the same dimensions as the tip tapered part 15 of the extension tube 9, and can fit the gap suction port 16 and other suction ports as shown in FIG.

The tip of the tubing inserted into the tapered part 12 is an airtight fitting part 1
4 to prevent air from entering from outside.

The inner and outer ribs 13 and the annular groove 11 of the expansion part 7 serve to reduce the wall thickness of the expansion part 7 and reduce material costs.

Note that a guide tapered portion 17 with a large expansion is provided at the tip of the tapered portion 12 in order to facilitate insertion of tubing.

As described above, the present invention is a hose end joint tube that removably connects suction ports through a telescopic multi-stage extension tube, and the outer surface has a tapered fitting part that airtightly connects to the extension tube. Each of the above-mentioned suction ports is formed with a light-spreading fitting taper portion that directly connects the suction ports, and at least one of both taper portions is formed with a plurality of axial ribs, so that the number of expansion and contraction stages is large. As a result, an extension pipe with a large outer diameter can be connected using the tapered part on the outer surface, and a suction port with a small diameter can be directly connected using the tapered part on the inner surface, making it easy to use. Since the wall thickness can be made thinner, precise fitting can be achieved without shrinkage and no air leakage during fitting, which has a practically beneficial effect.

[Brief explanation of the drawing]

Figures 1 and 2 are side views of a vacuum cleaner with a joint pipe according to the present invention. Figure 1 shows the extension pipe connected to the joint pipe, and Figure 2 shows the gap suction port connected to the joint pipe. Indicates the state of Fig. 3 is a partial sectional view of the joint tube of the present invention, Fig. 4 is a sectional view taken along line IV-IV in Fig. 3, and Figs. 5 and 6 are similar to Fig. 3, showing different usage conditions. FIG. 7 and 8 are side views of the extension tube for explaining the effects of the present invention. 4...Joint pipe, 8...Tapered part for fitting, 12...Tapered part for fitting.

Claims (1)

[Scope of utility model registration request] In a device that removably connects suction ports via a telescoping multi-stage extension pipe, the outer surface has a tapered fitting part that airtightly connects to the extension pipe, and the inner surface has a tapered fitting part that connects the suction ports directly. 1. A distal end joint tube for a vacuum cleaner hose, characterized in that a fitting taper portion for light spreading is formed, and at least one of the taper portions is formed by a plurality of axial ribs.