JPH02268717A - Hose for vacuum cleaner - Google Patents

Abstract

PURPOSE:To obtain a hose which is good in flexibility, durability, appearance and ease of handling, light in weight and small in size, and excellent in insulating property and workability with a little generation of electric noise by a method wherein three or more spiral members made of electric conductive material are wound parallel to each other at distances, two of them are better in electric conductivity than the others and covered over the surface with an insulating sheath. CONSTITUTION:A hose 4 is composed of a cylindrical tube 18 and spiral reinforcing members 19-22, and formed into a spiral bellows shape. The spiral members 19 and 20 are made of hard steel wire 23 like piano wire and covered with an insulating sheath 24 of hard synthetic resin. The spiral members 21 and 22 are made of hard steel wire 23 clad with conductive material 25 like copper on top and covered with insulating sheath of hard synthetic resin. The spiral members 19 and 20 are used as signal lead wires for a hard switch 12, and the spiral members 21 and 22 for power lead wires for a power brush suction port 6. Thereby, the hose is improved in appearance with a good flexibility, and made smaller in size and lighter in weight. As the lead wires are arranged apart, generation of electric noise is diminished and there is not a risk of wire breaking or short-circuit. Moreover, the hose requires less amount of materials and has a good workability, so that the production cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a hose for a vacuum cleaner, and more particularly to an improvement in a conductive hose for a vacuum cleaner.

[Conventional technology]

Conventionally, as described in Japanese Utility Model Publication No. 63-14765, a hand switch for controlling the operation and stopping of an electric blower built into the vacuum cleaner body was provided on the grip at the end of the hose.
For vacuum cleaners that use a power brush suction with a built-in electric rotating brush for carpet cleaning, there are two signal wires for the hand switch and two power wires for the power brush suction.
A total of four conductors needed to be attached to the hose. In addition, the voltage and current supplied to these conductors were low voltage and small current in the hand switch signal line with a remote control relay interposed between it and the electric blower, but the power line for the power brush suction As with electric blowers, the power supply voltage is applied, resulting in high voltage and large current. Therefore, although it is possible to use the hard steel wire spiral body for reinforcing tubes that is generally inscribed in hoses as a signal line for a hand switch, it is not suitable for use as a power line that carries large currents due to heat generation and There is a risk of deterioration and damage to the insulation coating.

Conventionally, copper wire, which is a better conductor than hard steel wire, has been used for power supply wires that carry large currents, but copper wire is softer than hard steel wire, so it is difficult to connect to hoses. Conventionally, the wiring methods have been devised as shown below.

(1) First, the hose shown with the reference numeral 100 in Figs. 8 and 9 is
Two tube-reinforcing hard steel wires 102 and 103, each coated with an insulating coating 101 on the surface thereof, are spirally wound in parallel and fixed inwardly to a tube 104 to form a signal line. In addition, the power supply 1@105 is connected to the hose 100 via the adapter 106.
It is circumscribed and fixed to . Note that this power supply line 105 is made by covering two copper wires 106 with an insulation coating 107 side by side with an outer sheath 108 .

(2) Next, the hose shown with reference numeral 200 in FIG. It is internally fixed to 204 and used as a signal line. Also,
The power supply wires are two copper wires 205 with an insulating coating 206 arranged side by side and covered with a jacket 207 integrated with the tube 204.

(3) In addition, the hose shown with reference numeral 300 in FIG. Then, these two wires are wound spirally in parallel.

It is internally fixed to the tube 307. The hard steel wire 301 for reinforcing the tube is used as a signal wire for the hand switch, and the copper wire 303 is used as a power supply wire.

(4) Furthermore, a hose 40 indicated by reference numeral 400 in FIG.
0, a copper wire 403 coated with an insulation coating 402 and a tube reinforcing hard steel wire 401 are arranged in parallel.

A conductor 405 integrally molded with an insulator 404.
406 are spirally arranged in parallel and wound to form a tube 407.
It is inscribed and fixed to. The hard steel wire 401 for reinforcing the tube is used as a signal wire for the hand switch, and the copper wire 403 is used as a power supply wire.

[Problem to be solved by the invention]

However, in the prior art described above.

In the hoses shown in (1) and (2), the power line is provided so as to project outwardly in the axial direction of the hose, so the flexibility of the hose is generally reduced and the appearance is also poor. Further, each time the hose is bent, bending force and tensile force are applied to the power line, which may cause the line to break. Furthermore, in the case shown in (2), the power supply wire tends to twist in the axial direction of the hose.

In addition, those shown in (1) that are difficult to mold,
The part of the power line that is not fixed with the adapter hangs out and easily gets caught on surrounding objects, making it difficult to handle.

On the other hand, in the cases shown in (3) and (4), the signal line for the hand switch and the power line are provided inside the hose, so although the appearance is clean, the signal line for the hand switch and the power line are provided inside the hose. Since they are placed close together, the spiral becomes thicker, and if you try to keep the inner diameter so as not to increase ventilation loss, the outer diameter becomes thicker. In addition, if the hose is made to have the same pitch as a normal hose with only a signal line for a hand switch in order to have compressive strength, the weight of the insulation coating and copper wire will increase by 9, making it heavy. moreover,
Since many materials are required, the cost is high. Furthermore, since the signal line for the hand switch and the power supply line are bundled in close proximity to each other, short circuits are likely to occur if the insulation coating is torn, and electrical noise is also likely to occur. Furthermore, it is more difficult to mold than ordinary hoses, resulting in increased costs.

By the way, in order to increase the flexibility, flat strength, and pressure resistance of a flexible hose, a plurality of tube reinforcing spiral bodies of different thicknesses were wound in parallel and spaced apart, and the Japanese Patent Publication No. 55-6798 There is an example described in the publication, but the main purpose of this is to improve strength and flexibility, and the application of current is not considered, and the spiral body for reinforcing thick tubes is used for reinforcing thin tubes. Although it has somewhat better conductivity than a helical coil, there is a problem with heat generation when a large current is passed through it, such as in a power line. In addition, since the thin tube reinforcing spiral body is simply embedded within the soft wall portion of the hose,
If the positions of adjacent helical bodies shift during the molding process, the thickness of the coating will be uneven, which may cause mutual short circuits or poor insulation from the outside.

On the other hand, in order to allow a large current to flow through the tube reinforcement spiral,
An example of arranging thin copper wires approximately parallel to the surface of a hard steel wire is the example described in Japanese Utility Model Publication No. 12927/1983, in which the copper wire is placed in close contact with the hard m-wire. Although good conductivity can be obtained, it does not take into account that the signal current for the hand switch and the power supply current should flow simultaneously through the tube reinforcing spiral body.

Furthermore, as an example mentioned in the above-mentioned Japanese Patent Publication No. 55-6798, there is an example in which a conductive wire made of copper wire is wound and fixed on the outer wall of a hose having a spiral body for reinforcing a tube made of hard steel wire. This is because the good R wire made of copper wire is wound around the outside, resulting in poor durability and the possibility that the conductive wire may be exposed to the outside. Furthermore, if the tube reinforcing helix made of hard steel wire and the conductive wire made of copper wire are wound in parallel with the same pitch, the copper wire side will be weaker, so the flattening resistance will be stronger. , compressive strength decreases.

To summarize the above, conventional vacuum cleaner hoses that use tube-reinforcing spirals for the signal line and power line for the hand switch have excellent flexibility, durability, and appearance.

Handling properties: 2 weight, electrical noise, insulation, and processability.

There were advantages and disadvantages in terms of material costs.

An object of the present invention is to provide a conductive hose for a vacuum cleaner having a hand switch signal line for small current and a power line for large current, which has good flexibility, durability, good appearance, and ease of handling. Moreover, it is lightweight, small, and has low electrical noise and insulation properties.
Excellent workability. An object of the present invention is to provide a low-cost vacuum cleaner hose.

Means for Solving C714M] The object is to provide a vacuum cleaner hose having a spiral bellows shape consisting of a tube and a tube-reinforcing helical body inscribed or embedded in the tube, in which at least three conductive material winding the helical body composed of parallel and spaced apart,
This is achieved by constructing at least two of the spirals with better conductivity than the others and whose surfaces are coated with insulation.

[Effect]

For example, two spirals of hard steel wire with low conductivity coated with insulation are used as the signal wire for the hand switch, and two spirals of high conductivity coated with insulation are used as the power supply wire, and these wires are connected to the outer jacket of the hose. When the hose is fixed inwardly or buried in the tube forming the tube, and is wound in four pieces spaced apart in parallel, the same pitch (adjacent helical pitch), the length of the helix can be shortened to save material costs and reduce weight. In addition, if the surface of a hard steel wire is coated with a good conductor such as copper, a highly conductive spiral can be obtained as a power supply wire, so if only a good conductor such as copper wire is used as a power supply wire. It saves material costs, and since hard steel wire is used as the core material, flat strength and
It also maintains pressure contact strength. In addition, if the hand switch signal wire and power wire are placed apart from each other, each spiral becomes thinner, and the outer diameter of the hose can be made thinner as well, thereby suppressing electrical noise caused by mutual interference. Even if the insulation coating were to break, there is no risk of short circuiting with adjacent conductors.

Furthermore, the wire is insulated and wrapped in a spiral,
Those that are internally fixed have good workability. Furthermore, if the power line is inscribed in the hose, (1) of the conventional example mentioned above, (
As in 2), there is no damage to the appearance, no risk of wire breakage, and no loss of availability. Furthermore, when the power wire is inscribed in the hose, poor insulation due to abrasion of the covering material is less likely to occur than when the power wire is wound around the outside of the hose. In addition, if you use inexpensive hard steel wire for small currents and hard copper wire coated with a good conductor such as copper for large currents, you can efficiently connect signals or power supplies for multiple hand switches at low cost. This makes it possible to supply

〔Example〕

Hereinafter, the present invention will be explained based on the drawings. FIG. 1 is a longitudinal cross-sectional view of the internal structure of an embodiment of the vacuum cleaner hose according to the present invention, and FIG. 2
2 is a perspective view of the spiral body, FIG. 3 is a side view showing the overall structure of a vacuum cleaner incorporating the hose shown as 4 in FIG. 1, and FIG. 4 is a power brush suction port shown as 6 in FIG. 3. A perspective view of.

FIG. 5 is an electrical circuit diagram showing an operating system of a vacuum cleaner incorporating the hose 4 of FIG. 1.

In FIG. 3 showing the overall configuration of a vacuum cleaner, a vacuum cleaner main body 1 has a built-in electric blower 2 and a dust collector 3 that collects dust. In addition, a hose 4 is connected to the dust collecting section 3.
．． An extension pipe 5 and a power brush mouthpiece 6 are attached. As shown in FIG. 4, the power brush suction port 6 includes a rotating brush 7 for carpet cleaning and an electric motor 8 that drives the rotating brush 7. Rotation of the electric motor 8 is transmitted to the rotating brush 7 by a belt 9. Further, power to the electric motor 8 is supplied from the cleaner body 1 to the electric motor 8 via a power line built into the hose 4° extension tube 5 and a connecting pin 10 of the power brush suction port 6.

In FIG. 3, the grip part 11 of the hose 4 has a hand switch 12 for starting and stopping the electric blower 2, and a power brush switch 13 for starting and stopping the electric motor 8.
and is provided. Also, hose 4. Extension tube 5. The power brush suction ports 6 are configured to be detachable from each other using an attachment/detachment button 14.

Here, the vacuum cleaner body 1. Hose 4. The circuit configuration of the extension tube 5° power brush suction port 6 will be explained based on FIG.

In FIG. 5, an electric blower 2 and a motor 8 are connected in parallel to an AC power source 15, and a fuse 16 for protecting against excessive power is connected in series between these and the power source 15. The electric blower 2 is operated and stopped by a remote control relay 17 built into the cleaner body 1 and a hand switch 12 that controls the remote control relay 17. That is, when the hand switch 12 is closed, an exciting current flows through the secondary coil 17b excited by the primary coil 17a, the magnet coil 17c is excited, and the relay switch 17d is closed. At this moment, current flows through the electric blower 2, and operation is started. On the other hand, 1 hand switch 1
2, the excitation current stops and relay switch 17d
opens and the electric blower 2 stops. Note that this remote control relay 17 suppresses the voltage and current applied to the secondary coil 17b1 hand switch 12 to be lower than that of the primary coil 17a. Furthermore, the operation and stopping of the electric motor 8 is controlled by a power brush switch 13.

Next, the structure of the hose 4 will be explained with reference to FIGS. 1 and 2.

In FIG. 1, the hose 4 includes a soft synthetic resin cylindrical tube 18 for keeping the inside airtight, and a tube 1.
It is formed into a flexible spiral bellows shape by four hose reinforcing spiral bodies 19, 20, 21, and 22 which are internally fixed and wound. In this embodiment, four spiral bodies 19 to 22 are wound parallel to each other at equal pitches. Incidentally, among the four spiral bodies 19 to 22, the spiral bodies 19 and 20 are formed by applying an insulating coating 24 of hard synthetic resin to a hard steel wire 23 such as a piano wire. In addition, the spiral bodies 21 and 22 are connected to the hard steel wire 2 as shown in FIG.
A good conductor 25 such as copper is closely adhered to the outside of 3, and an insulating coating 24 made of hard synthetic resin is applied. That is,
The spiral bodies 21 and 22 have better electrical conductivity than the spiral bodies 19 and 20, and the hose 4 configured as described above is
In the circuit illustrated in the figure, the spiral bodies 19 and 20 are used for the signal line of the hand switch 12, and the spiral bodies 21 and 22 are used for the power line of the power brush mouthpiece 6.

In the above configuration, when the hand switch 12 is opened or closed,
The remote control relay 17 is activated by the hand switch signal line using the spiral body 19, 20 of the hose 4, and the electric blower 2 is operated or stopped. Also, power brush switch 1
When 3 is opened and closed, the extension tube 5. Electric power is supplied to and stopped from the power brush suction port 6, and the electric motor 5 is started and stopped.

FIG. 6 is a longitudinal cross-sectional view of the internal structure of the hose showing a second embodiment of the hose for a vacuum cleaner according to the present invention, and FIG. 7 is an operation of a vacuum cleaner incorporating the hose shown with reference numeral 4 in FIG. 6. It is an electric circuit diagram showing the system, and on the actual flow side, one of the two signal lines of the hand switch 12 is used in common as the power line of the power brush mouthpiece 6. That is, in this embodiment, the structure of the hose 4 is one in which the spiral body 19 for the hand switch signal line explained in FIG. 1 of the previous embodiment is removed by one, and according to the structure shown in FIG. hose 31
The only need for the sensing body to be inscribed in the circuit is three spirals 31°, 32, and 33, making it possible to further reduce the weight and cost of the hose. The two spiral bodies 19 and 20 are replaced by one spiral body 31 in FIG.
can be shared. In this case, a resistor 34 is inserted in the signal line on the hand switch 12 side so that a large current does not flow through the spiral body 31 on the hand switch 12 side.

As described above, according to the present invention, the power wire is internally or buried in the tube of the hose and is wound and fixed in a spiral shape, compared to the conventional case where the power wire is provided externally in the axial direction of the hose. This does not affect the hose's flexibility, and there are no problems with handling, such as dangling power lines. Furthermore, there is no risk of disconnection of the power supply line due to bending of the hose. Furthermore, the appearance of the hose is not impaired.

In addition, in the present invention, the signal wire for the hand switch and the power supply wire are spaced apart from each other and wound and fixed in parallel in a spiral shape, so that they do not electrically interfere with each other, and There is also little noise generated, and there is no risk of short-circuiting. Furthermore, we used a hard steel wire with low conductivity for the signal wire for the hand switch, and a hard steel wire coated with a good conductor such as copper for the power wire, and each wire was insulated and spirally spaced apart. By winding and fixing it in a shape, the thickness of each spiral becomes thinner than when the signal wire for the hand switch and the power wire are bundled together, and the outer diameter of the hose itself can be made thinner, and the power wire can also be made of copper. It is cheaper than using only a good conductor such as , and the length of the hose is shorter, so less material is required, the wire can be lighter, and it is economical. Furthermore, the power supply wire is a hard steel wire coated with a good conductor such as copper on the outer periphery.

There is no need to worry about heat generation, and since the power line is made of hard steel wire as a core material, the flat strength and pressure bonding strength of the hose are lower than those using only a good conductor such as copper for the power line. In addition, both the signal line and the power line can be coated with an insulating coating on a conductive material, inscribed or buried in the hose tube, and then wound and fixed in a spiral shape, so the processing can be done using conventional technology. This method is easier to process than the method of bundling the signal wire for the hand switch and the power supply wire or embedding reinforcing spiral bodies of different thicknesses in a parallel spiral shape in a plurality of tubes.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, the signal line for the hand switch and the power line are inscribed or buried in the hose, and are spirally connected at a distance from each other. Since they are arranged parallel to each other, they have improved appearance, are easy to handle, and are lightweight.

Can be made smaller. Also, since the conductors are separated from each other,
There is little electrical noise generation and there is no risk of disconnection or short circuits.

Furthermore, since it requires less material and has good workability, it can bring about various remarkable effects such as cost reduction.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of the internal structure of an embodiment of the vacuum cleaner hose according to the present invention, FIG. 2 is a perspective view of the spiral body indicated by numerals 21 and 22 in FIG. Fig. 1 is a side view showing the overall structure of a vacuum cleaner incorporating a hose designated by numeral 4, Fig. 4 is a perspective view of the power brush suction port shown by numeral 6 in Fig. 3, and Fig. 5 shows the hose shown in Fig. 1. 6 is a vertical sectional view of the internal structure of the hose showing a second embodiment of the vacuum cleaner hose according to the present invention, and FIG. Electrical circuit diagram showing the operating system of a vacuum cleaner incorporating the hose shown with reference numeral 4 in the figure, No. 8
The figure is a vertical cross-sectional view of the internal structure of the hose showing a specific example of a hose for a vacuum cleaner according to a conventional proposal, and FIG.
FIG. 10 is a perspective view showing the overall structure of a vacuum cleaner incorporating a vacuum cleaner hose designated by 00, and FIG. , FIG. 11 shows the conventional electric #1#? shown at 200 in FIG. 10. A perspective view of a vacuum cleaner hose, FIG. 12 is a vertical sectional view of the internal structure of the hose showing a third specific example of a vacuum cleaner hose according to a conventional proposal, and FIG. 13 is a longitudinal sectional view of a vacuum cleaner hose according to a conventional proposal. It is a longitudinal cross-sectional view of the internal structure of a hose showing a fourth specific example. 4...Hose, 18...Tube, 19,20,2
1゜22... Tube reinforcing spiral body, 23... Hard steel wire, 24... Insulating coating, 25... Good conductor, 31,
32゜Second Flash Figure 3 Chakasumi/I Zθ Memukuchi No. 8 Kanpo Irot. mouth sword

Claims (1)

[Claims] 1. A spiral bellows-shaped vacuum cleaner hose consisting of a tube and a tube-reinforcing helical body inscribed in the tube, wherein the helical body is made of at least three or more conductive materials. Wound in parallel and spaced apart, of which at least 2
This hose for vacuum cleaners is characterized by having better conductivity than others and being constructed of a spiral body with an insulating coating on the surface. 2. In a spiral bellows-shaped vacuum cleaner hose consisting of a tube and a tube-reinforcing spiral body embedded in the tube, at least three spiral bodies made of a conductive material are wound in parallel and spaced apart. , of which at least 2
This hose for vacuum cleaners is characterized by having better conductivity than others and being constructed of a spiral body with an insulating coating on the surface.