JPH0713631Y2 - Flexible hose for vacuum cleaner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flexible hose for a vacuum cleaner.

2. Description of the Related Art FIG. 5 shows the overall structure of an electric vacuum cleaner, which includes a vacuum cleaner body 4 having a vacuum suction fan 2 and a dust collecting portion 3 built in the front and rear portions, and a hose port 1a provided at one end. A flexible hose 1 having a corrugated shape (bellows) in which a hose port 1b provided on the other end side is connected to the rear end of the suction pipe 6 on the front surface of the cleaner body 4, and the suction pipe 6
And a suction tool 7 (power brush) connected to the front end of the suction tool 7, and by driving a motor 7a provided on the upper part of the suction tool 7, the dust is struck out by the brush and sucked by the vacuum suction fan 2. However, it has a basic structure in which dust is taken into the dust collecting portion 3 via the suction pipe 6 and the flexible hose 1.

In addition, hand switch parts 1c and 1d for remote control are provided at the front end of the hose opening 1b.
The vacuum suction fan 2 can be turned on and off by turning on and off 1c. Moreover, the motor 7a can be turned on and off by 1d.

Therefore, the flexible hose 1 has a remote control circuit (hereinafter referred to as the former circuit) for performing the on / off operation of the vacuum suction fan 2 and the motor through the flexible hose 1.
A circuit (hereinafter referred to as the latter circuit) for connecting the power cord 8 extending from the cleaner body 4 to the cleaner 7a is provided.

As a conventional example of a flexible hose provided with such a circuit (hereinafter referred to as a first conventional example), Japanese Patent Laid-Open No. 129490/1985.
There is one described in the publication. This flexible hose
At the intermediate position between the top of the mountain on the peripheral wall of the hose and the bottom of the valley, four hard wire rods are attached to the hose by spirally winding, and two hard wire rods are used to connect the former circuit described above to the remaining two. The latter circuit is composed of hard wire.

Another conventional example (hereinafter referred to as the second conventional example) is disclosed in Japanese Utility Model Laid-Open No. 163954/1982. This flexible hose is mounted on the inner wall of the hose by spirally winding two spiral reinforcements, which are hard steel wire and copper wire coated with synthetic resin, in the axial direction of the hose. That is, these two spiral reinforcements form the two circuits.

Further, as another conventional example (hereinafter, referred to as a third conventional example), a copper wire which is formed in a straight line in the axial direction on the outer wall of the hose constitutes the former circuit by a synthetic resin-coated hard rope attached to the inner wall of the hose. In some cases, a steel wire or the like constitutes the latter circuit.

However, in the first and second conventional examples, although the mounting positions for the hose are different, since the hard wire rods or spiral reinforcements for the two circuits are mounted at the W pitch,
There is a drawback that the momentum hose becomes heavy and the operability deteriorates.

Further, in the third conventional example, since the former circuit is made linear, the length thereof can be shortened, so that there is an advantage that the weight of the hose can be reduced as compared with the first and second conventional examples. However, there is a drawback in that the hose is impaired in flexibility, and in some cases, defects such as breakage of copper wires and steel wires and breakage of the hose may occur.

The present invention has been made in order to solve the drawbacks of the prior art, and an object thereof is to provide a flexible hose for an electric vacuum cleaner that can reduce the weight and does not impair the flexibility.

Means for Solving the Problems In a flexible hose for an electric vacuum cleaner according to the present invention, two copper-coated steel wires coated with a synthetic resin are provided on the inner wall of a tube made of a synthetic resin having an inner and outer two-layer structure. It is characterized in that it is attached in a spiral state in the axial direction of the tube, and an expandable copper wire is provided in the axial direction between the inner and outer layers of the tube.

Further, two copper-coated steel wires coated with a synthetic resin are attached to the inner wall of the tube made of a synthetic resin in a spiral state in the axial direction of the tube, and the outer surface or the inner surface of the tube is provided along the axial direction thereof. It is characterized by attaching a stretchable copper wire.

Operation Assuming a case where the flexible hose 1 is bent with the side provided with the expandable copper wire 15 as the outside as shown in FIG. 3 (b), the outer surface side of this extends and the inner surface side contracts, At this time, since the spirally wound copper foil or copper wire 15b extends from the state shown in FIG. 3 (a) in accordance with the extension on the outer surface side, the flexibility of the flexible hose 1 is adversely affected. It has no effect.

Further, by providing the expandable copper wire 15 in the axial direction, the length thereof can be shortened, and as a result, the weight of the flexible hose 1 as a whole can be reduced.

Embodiment An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a partially enlarged vertical sectional view showing a flexible hose for an electric vacuum cleaner of the present invention, and FIG. 2 is an enlarged transverse sectional view of a main part.

This flexible hose 1 has a corrugated wire formed by attaching copper-coated steel wires 12a and 12b at a W pitch to an inner wall surface 11a of an inner layer 11 of a soft synthetic resin tube (for example, vinyl chloride) having an inner and outer two-layer structure. It was formed.

The copper-coated steel wires 12a and 12b are, as shown in FIG.
The surface of the hard steel wire 120 is plated with copper 121, and a tube 122 made of vinyl chloride covering these is attached to the inner wall surface 11a and attached to the flexible hose 1. These copper-coated steel wires 12a and 12b form a circuit that connects the motor 7a for driving the suction tool 7 and the power cord 8 extending from the cleaner body 4 (see FIG. 5). Further, the copper-coated steel wires 12a and 12b have a function of retaining the shape of the flexible hose 1.

Between the inner layer 11 and the outer layer 13, a fiber reinforcing body 14 made of a large number of nylon threads or the like is attached in a wound shape along the outer surface of the inner layer 11, and between the fiber reinforcing body 14 and the outer layer 13, The expandable copper wire 15 is attached substantially parallel to the axial direction of the flexible hose 1. An expandable copper wire 15 may be attached between the inner layer 11 and the fiber reinforcement 14.

The expandable copper wire 15 has a structure in which an elastic linear body 15a such as a polyurethane string is used as a core and a copper foil or a copper wire 15b is wound around the elastic linear body 15a in a coil shape. The expandable copper wire 15 is covered with a tube 16 made of highly elastic urethane. Stretchable copper wire 15
Is for configuring the above-mentioned remote control circuit, and therefore, the copper-coated steel wire 12 is used according to the size of the transmission capacity.
It has a smaller electrical capacity than a and 12b.
Two pieces are provided as shown in the figure. These two stretchable copper wires
15 is interposed between the inner and outer layers 11 and 13 of the flexible hose 1.

In this case, the stretchable copper wire 15 may be simply interposed between the inner and outer layers 11 and 13, but may be bonded to the outer surface of the inner layer 11 or the inner surface of the outer layer 13. Although not shown, the two expandable copper wires 15 are housed in a tying tube, and in that state, the inner and outer layers 1
It may be interposed between 1 and 13. Further, the stretchable copper wire 15 may have a stretchable property in addition to the above-described configuration, and for example, a configuration may be adopted in which a coiled copper wire is inserted into a stretchable insulating tube, or a similar tube. The copper wire may be inserted in a meandering state. The expandable copper wire 15 is not limited to be substantially parallel to the axial direction of the hose, and may be interposed at a slight inclination angle.

FIG. 4 shows a modification of the present invention. In this modification, the flexible hose 1 has a one-layer structure, and the expandable copper wire 15 is provided on the outer surface of the hose. In addition, the same reference numerals are given to the portions corresponding to those in the above embodiment, and the description thereof will be omitted.

Thus, it is possible to realize a flexible hose for an electric vacuum cleaner with a simple structure, which can reduce the cost.

In the modified example, the expandable copper wire 15 may be provided on the inner surface side of the hose. That is, the copper-coated steel wires 12a, 12b may be attached to the inner wall surface 11a of the corrugated hose, and the expansion copper wire 15 may be attached to the inner surface side of these, or the expansion copper wire 15 may be attached to the inner wall surface 11a of the hose. The copper-coated steel wires 12a and 12b may be attached to the inner surfaces of these.

Effect of the Invention In the flexible hose for the electric vacuum cleaner according to claim 1 or 2, since the expandable copper wire provided in the axial direction of the hose constitutes a circuit for turning on and off the vacuum suction fan, The length of the electric wire for the circuit can be shortened as compared with the above-mentioned first and second conventional examples. Therefore, the weight of the entire hose can be reduced by that much, and the operability can be improved.

Further, since it is an expandable copper wire, it expands and contracts following the expansion and contraction accompanying the bending deformation of the hose, so the flexibility of the hose is not impaired. Therefore, problems such as breakage of electric wires and breakage of hoses do not occur.

Furthermore, in the flexible hose for an electric vacuum cleaner according to claim 1,
Since the expandable copper wire is interposed between the inner and outer two layers of the tube, it is not exposed to the outside, and the appearance is improved in terms of aesthetics.

In the flexible hose for an electric vacuum cleaner according to claim 2, since the weight of the entire hose can be further reduced, the operability can be further improved, and the structure of the hose can be simplified, so that the manufacturing cost can be reduced. It can be reduced.

[Brief description of drawings]

FIG. 1 is a partially enlarged vertical sectional view showing a flexible hose for a vacuum cleaner of the present invention, FIG. 2 is an enlarged transverse sectional view of an essential part, and FIG. 3 is a state in which a flexible hose for a vacuum cleaner of the present invention is bent. It is a front view shown. FIG. 4 is a vertical sectional view showing a modification of the present invention. FIG. 5 is a front view showing the overall structure of the electric vacuum cleaner. 1 ... Flexible hose, 11 ... Inner layer, 12a, 12b ... Copper coated steel wire, 13 ... Outer layer, 15 ... Expandable copper wire, 15b ... Copper foil.

Claims (2)

[Scope of utility model registration request] Claim: What is claimed is: 1. Two copper-coated steel wires coated with a synthetic resin are attached to an inner wall of a synthetic resin tube having an inner and outer two-layer structure in a spiral state in the axial direction of the tube, and A flexible hose for an electric vacuum cleaner, characterized in that a stretchable copper wire is provided between the outer layers in the axial direction of the outer hose. 2. Two copper-coated steel wires coated with a synthetic resin are attached to an inner wall of a tube made of a synthetic resin in a spiral state in the axial direction of the tube, and the outer surface or the inner surface of the tube is provided with an axial direction thereof. Flexible hose for electric vacuum cleaner, characterized in that a stretchable copper wire is attached along the line.