JPS6140278Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a suction hose for a vacuum cleaner.

For vacuum cleaners equipped with a long suction hose of more than 10 m, it is necessary to protect the long hose and to take it in and out of small spaces in an orderly manner. For this reason, a method has been proposed in which a hose storage box is provided in which a long hose is wound in a coil shape, and a connection portion is provided inside the box for holding one end of the long hose and connecting it to a dust collection chamber that is under negative pressure. However, it is expected that the operation of putting in and taking out long hoses will be improved, but if the length exceeds 10 m, even if you close one end of the long hose by hand when storing it and use the shrinkage effect due to negative pressure inside the long hose. You need to use your other hand to correct the twist in the long hose while looping it and feeding it into the hose storage box. Therefore, improvements are required. In addition, the end of the long hose is equipped with a grip pipe that bends into a dogleg shape to connect other suction pipes, and since the handle pipe does not bend, it will be difficult to fit if the inside diameter of the hose storage box is made small. It has its drawbacks.
Furthermore, the bending angle of the grip tube is constant and cannot be changed depending on the application.

This invention was made in view of the above-mentioned points, and the object is to provide a suction hose for a vacuum cleaner in which a long telescopic hose can be stored in a hose storage box very easily.

This invention provides an extensible hose that is wound into a coil and stored in a hose storage box, and one end of which is held in a connecting part provided in the hose storage box and connected to a dust collection chamber. An external intubation tube having a holding part at the other end is provided, and an internal intubation tube having a held part rotatably held in the holding part with a variable connection angle is fitted into the external intubation tube. The present invention is characterized in that a shielding piece is integrally formed at the end portion to open and close the air passage of the external intubation tube by its rotational movement. Therefore, when closing the air passage and shrinking the telescopic hose using negative pressure and storing it in the hose storage box, there is no need to hold down the air passage by hand to keep the air passage closed. The structure is such that the twist can be corrected using both hands.

A first embodiment of this invention will be explained based on FIGS. 1 to 5. Reference numeral 1 denotes a vacuum cleaner body, and the vacuum cleaner body 1 has a built-in electric blower (not shown), and a dust collection case 2, which is a dust collection part maintained at negative pressure by the electric blower, can be freely pulled out. A hose storage box 3 is provided at the top. This hose storage box 3 is formed with a hose storage chamber 5 and an accessory storage chamber 6 in which telescopic hoses 4 having a length of 10 m or more are stored in a coiled manner. This hose storage chamber 5 is provided with a connecting portion (not shown) that connects to the dust collection case 2 while holding one end of the retractable hose 4 .
Further, a lid 7 having a window 8 through which the telescopic hose 4 is inserted is attached to the upper part of the hose storage box 3 so as to be openable and closable.

Next, a connecting pipe 9 is connected to the other end of the telescopic hose 4.
is fixed, and an external intubation tube 10 is fitted into this connecting tube 9. A hose cover 13 that surrounds the connecting tube 9 while having the connecting tube 9, the external tube 10, and the hand switch 12 has a square cross section. A pin hole 15 as a holding portion 15a is formed in the opposing side wall 14 of the external tube 10, and the tip of a side 16 adjacent to the side wall 14 is bent inward with a radius centered on the pin hole 15. A curved surface 17 is formed, and this curved surface 17
The distal end edge is a locking edge 18. Further, the distal end edge of the side 19 of the external tube 10 that faces the side 16 is also used as a locking edge 20, but while the locking edge 18 is located forward of the pin hole 15, the other locking edge The edge 20 is located further back than the pin hole 15. Thus, an inner intubation tube 11 is provided in which the fitting portion with the outer intubation tube 10 has a square cross section, and the other section has a circular cross section. A pin hole 15 as a held portion 15b that matches the pin hole 15 is formed in both side walls 21 of this inner tube 11, and a curved surface 23 that matches the curved surface 17 and a locking edge 18 are formed on the other side 22. A step portion 24 that abuts is formed, and a step portion 26 that abuts the locking edge 20 and a shielding piece 27 are formed on a side 25 opposite to the side 22 . The outer intubation tube 10 and the inner intubation tube 11 are fitted into each other and are further rotatably connected by a rivet 28 passed through the pin hole 15.

In such a configuration, the tip of the retractable hose 4 pulled out from the hose storage box 3, that is, the inner tube 11
As shown in FIG. 5a, connect a suction pipe such as an extension pipe 29 or a floor brush 30, or connect a suction pipe such as a round brush 31 directly to the inner tube 11 as shown in FIG. 5e. In this state, the electric blower is operated to perform cleaning. In the state shown by the solid line in FIG. 3, the locking edges 18, 20 of the outer intubation tube 10 abut against the step portions 24, 26 of the inner intubation tube 11, and their axes are bent at an obtuse angle. In this state, the shielding piece 27 is joined to one side 19 of the external intubation tube 10, fully opening the air passage of the external intubation tube 10, and is in a form suitable for cleaning the floor as shown in FIG. 5a. As shown by the imaginary lines in FIG.
When both are rotated until their axes are bent at an acute angle, the shielding piece 27 closes the air passage of the external intubation tube 10. As a result, the degree of vacuum in the air passage increases and the telescopic hose 4
shows a reduction effect. Therefore, there is no need to close the open end of the internal tube 11 with one hand, and the flexible hose 4 can be fed into the hose storage chamber 5 in a loop while correcting the twist of the flexible hose 4 with both hands. . Further, by bending the outer tube 10 and the inner tube 11 at an acute angle, the inner tube 11 does not protrude outside the hose storage chamber 5 as shown by the solid line in FIG. Thereby, the telescopic hose 4 can be stored neatly and easily in a small space.

Next, a second embodiment of this invention will be explained based on FIG. 6. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, the connecting tube 32 fitted to the expandable hose 4, the external tube 33 fitted to the connecting tube 32, and the hose cover 34 covering the connecting tube 32 have circular cross sections. The tip of the external intubation tube 33 has an axis B bent at an acute angle α to the axis A, and an axis C that intersects the bent axis B at an acute angle β. An opening edge 35 is formed. The inner tube 36 inserted into the opening edge 35 is formed with a flange 38 that is held rotatably in the circumferential direction while being prevented from coming off by a ring 37 that fits into the opening edge 35 as a holding portion 33a. is,
Furthermore, a cut 39 as a held portion is formed on the fitting portion side of the inner tube 36 in a plane perpendicular to a plane perpendicular to the axis thereof.
A shielding piece 40 is formed on the back surface of 9.

In such a configuration, cleaning is performed by stretching the telescopic hose 4 and fitting the suction conduit into the internal tube 36. Then, when the inner tube 36 is rotated in the circumferential direction within the plane where the ring 37 is located, the axis of the inner tube 36 changes from the extended axis of the axis B that intersects the axis A of the outer tube 33 at an obtuse angle. The axis changes to an axis D that intersects at an obtuse angle with respect to A, and accordingly, the amount of restriction of the air path of the external intubation tube 32 is changed by the shielding piece 40. It is closed by a shielding piece 40 at the position of the axis D.

Since this device is configured as described above, by rotating the inner tube, the air passage of the outer tube can be closed by the shielding piece, and therefore, the long telescopic hose can be stored in the hose storage box. Sometimes, there is no need to close one end of the retractable hose with one hand, and you can correct the twist in the retractable hose with both hands due to the shrinking effect of the retractable hose due to negative pressure, and then feed it into a loop into the hose storage box. As a result, the retractable hose can be stored very easily, and the inner tube can be rotated at an acute angle with respect to the outer tube so that it can be easily stored in a small space.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the first embodiment of this invention, Fig. 2 is an enlarged exploded perspective view of the outer and inner intubation tubes, and Fig. 3 is an enlarged longitudinal cross-section of the outer and inner intubation tubes. A side view, FIG. 4 is a plan view showing the retractable hose stored in the hose storage chamber, FIG. 5 is a partial side view showing the cleaning state, and FIG. 6 is a second embodiment of this invention. FIG. 2 is an enlarged longitudinal cross-sectional side view of an external intubation tube and an internal intubation tube showing the configuration. 2... Dust collection case (dust collection part), 3... Hose storage box, 4... Telescopic hose, 10... External intubation tube, 11
...Inner tube, 27... Shielding piece, 29... Extension tube (suction pipe), 30... Floor brush (suction pipe), 3
1... Round brush (suction pipe line), 33... External intubation tube,
36... Internal intubation tube, 40... Shielding piece.

Claims (1)

[Scope of utility model registration request] A retractable hose is provided which is wound into a coil and stored in the hose storage box, and one end of which is held in a connecting portion provided in the hose storage box and connected to the dust collection chamber, and the other end of the retractable hose is An external intubation tube having a holding part is provided, and an internal intubation tube having a held part which is rotatably held at a variable connection angle is fitted into the external intubation tube, and the end of the internal intubation tube is fitted into the external intubation tube. A suction hose for a vacuum cleaner, characterized in that a shielding piece is integrally formed to open and close the air passage of the external tube by rotational movement.