JPS6112927Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a remote switch type electric cleaner hose that electrically connects the start/stop switch provided on the drive device connected to the hose tip and the operation switch provided on the grip on the cleaner body side. The present invention relates to an improvement in a conductive hose for a cleaner configured by embedding a connecting conductor in a spiral shape in the hose itself.

In this type of conductive cleaner hose that has been known in the past, the reinforcing copper wire itself, which is spirally wound and fixed to the inner wall of the bellows-shaped hose to reinforce the hose, also serves as a conductor. However, in such hoses, reinforcing copper wire with a large diameter that also serves as a conductor is used to make it possible to carry large currents and exhibit sufficient load performance. The functions strongly desired in this type of hose, such as elasticity and flexibility, are significantly hindered, and on the other hand, in order to improve stretchability and flexibility, small-diameter reinforcing copper wire that also serves as a conductor is used. Not only does it become impossible to pass a large current due to the voltage drop, but the shape-retaining strength of the hose due to the copper wire deteriorates, causing the hose to become susceptible to external forces caused by frequent stretching and bending during use. There is a drawback that the copper wire breaks and loses its conductivity early.

In addition, instead of the above-mentioned type that uses a reinforcing copper wire that also serves as a conductor, the reinforcing core wire is a steel wire, and a conductive wire made of a separate copper wire is wrapped around it at a distance from the reinforcing core wire. There are also structures in which a reinforcing spiral is formed by a reinforcing spiral, or a structure in which such a reinforcing spiral is wound and fixed on the outer surface of the bellows hose wall, but in the former, conductive material is passed through a relatively thick insulator around the core wire. Because the wire is wrapped around it,
The diameter of the reinforcing spiral becomes larger than necessary, and the length of the conductive wire becomes longer than necessary compared to the length of the core wire, which tends to waste material and complicate the processing process. However, there is a drawback that the reinforcing spiral body is worn out due to the dragging of the hose during use of the cleaner, which tends to cause inconveniences such as the conductive wires being exposed to the outside.

The present invention eliminates the drawbacks of the conventional conductive cleaner hoses as described above, and provides a conductive cleaner hose that has excellent flexibility and conductivity, and can be constructed economically by saving materials. The purpose is to provide

The characteristic structure of the conductive cleaner hose according to the present invention is that the cleaner hose is formed by winding and fixing two synthetic resin reinforcing spirals arranged in the axial direction of the hose on the inner wall of the bellows-shaped hose. A conductor consisting of a hard steel wire and a thin copper wire placed in contact with the outer periphery of the wire and parallel or substantially parallel to the axis of the hard steel wire is embedded in each of the reinforcing spirals. This configuration provides the following effects.

In other words, a conductor is constructed by using a hard steel wire with excellent toughness as a core wire, and placing a thin copper wire on the outer periphery of the core wire in contact with it. Compared to the case where the conductor also serves as the reinforcing core wire, it does not undergo plastic deformation easily, and the sufficient elastic recovery function due to the toughness of the hard steel wire is used to improve flexibility and shape retention. This makes it possible to obtain an excellent hose. Moreover, since both hard steel wire and copper wire are used as current-carrying materials, the diameter of the conductor that also serves as the reinforcing core wire can be made relatively small, making it flexible. Although it is superior, it also has sufficient current carrying performance.

Furthermore, rather than wrapping the copper wire around the hard steel wire, the thin copper wire is placed parallel or approximately parallel to the axis of the hard steel wire.
This method is advantageous in that the amount of expensive copper wire used can be significantly reduced compared to the case where the copper wire is wound around a hard steel wire.

Furthermore, by arranging the hard steel wire and the copper wire in contact with each other, it is possible to bring them as close together as possible, so the hard steel wire is minimized by twisting and bending deformation of the entire hose. It is also advantageous that the copper wire is located close to the wire so that there is less risk of the copper wire breaking due to the above-mentioned bending and deformation.

To describe the embodiment of the present invention in detail, two reinforcing spiral bodies 2, 2 made of hard synthetic resin are wound on the inner wall of a bellows-shaped hose 1 made of soft synthetic resin in a double pitch in the axial direction of the hose. In the hose for a cleaner that is fixed, each of the reinforcing spiral bodies 2,
As clearly shown in FIGS. 2 and 3, inside the hard steel wires 3, 3, such as piano wires, there is a wire in contact with the outer periphery of the hard steel wires 3, 3, and parallel to the axis of the hard steel wires 3, 3. A conductor 5 consisting of a plurality of arranged thin copper wires 4, 4 is buried in each case.

Each of the conductors 5, 5 is connected to one side so as to electrically connect a start/stop switch provided on the drive device side connected to the hose tip and an operation switch provided on the hose grip portion on the cleaner body side. One is used as the positive conductor 5, and the other is used as the negative conductor 5.

[Brief explanation of the drawing]

The drawings show an embodiment of the conductive cleaner hose according to the present invention, and FIG. 1 is a partially cutaway side view, and FIG.
The figure is an enlarged vertical sectional side view of the main part, and FIG. 3 is a partially cutaway perspective view of the reinforcing spiral body. 1... Bellows-shaped hose, 2... Reinforcing spiral body, 3
...hard steel wire, 4...thin copper wire, 5...conductor.

Claims (1)

[Scope of utility model registration request] In a cleaner hose formed by winding and fixing two reinforcing spiral bodies 2, 2 made of synthetic resin side by side in the axial direction of the hose on the inner wall surface of the bellows-shaped hose 1, inside each of the reinforcing spiral bodies 2, 2, Hard steel wire 3, 3 and
A conductor 5, 5 made of thin copper wires 4, 4 is buried in contact with the outer periphery of the wire, and is arranged parallel or substantially parallel to the axis of the hard steel wires 3, 3. conductive cleaner hose.