JP2001087185A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner having an extension pipe which is reliable and can be miniaturized. SOLUTION: In a vacuum cleaner provided with an extension pipe 4 which is extended and contracted in the state of being connected with one end of a hose 2 to be connected with a cleaner body 1 and a pipe 18 connected with a floor brush 3 and incorporating an electric conductor for feeding power to an electric load such as a rotary brush in an axial direction, a lead wire 14 is installed in the shape of turning like U along an outer pipe 5 so as to move in accordance with the variation of the length of the pipe 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a power supply structure to a floor suction tool incorporating electric parts such as a motor for driving a rotary brush, and comprises an outer pipe and an inner pipe sliding inside the suction pipe. The present invention relates to a vacuum cleaner having an extension tube capable of expanding and contracting the length of the vacuum cleaner.

[0002]

2. Description of the Related Art An extension pipe of a vacuum cleaner is provided between a hose connected to a cleaner body and a floor brush, uses a telescopic structure, and has a power supply structure. A vacuum cleaner provided with such an extension tube is disclosed in, for example, JP-A-9-24002 and JP-A-9-24003.
As shown in FIG. 5, the above-described vacuum cleaner has an extension tube 4 that connects one end of a hose 2 connected to the cleaner body 1 and the floor brush 3. The extension pipe 4 has a basic structure in which a conductor for supplying an electric load such as a rotating brush is built in the axial direction, and is made expandable and contractable by an outer pipe 5 and an inner pipe 6 that slides inside the outer pipe 5. Make up.

FIG. 6A is a sectional view showing the configuration of an extension tube described in Japanese Patent Application Laid-Open No. 9-24002. In the drawing, an inner tube side storage portion 28 is integrally provided on one side surface of the inner tube 6 in the axial direction. The inner tube 6 is formed of an insulating material such as resin, and a pair of rail-shaped conductive bands B30 each having one end connected to a connection terminal B15 connected to the floor brush side are provided on the ceiling portion of the inner tube side storage portion 28. ing.

On the other hand, the outer tube side 5 has a cylindrical outer tube side storage portion 2 having an end portion integrally fixed to the inner tube 6 and containing a conductor A31.
9 and a cover 27 connected to one end of the conductor A31.
And a resilient contact 32 connected to the other end of the conductor A31. The outer tube-side storage portion 29 is slidable in the inner tube-side storage portion 28. Since the contact 32 is provided at the outlet of the outer tube side storage portion 29 and is brought into contact with the conductor B30, the power supply function is maintained even when the extension tube is expanded and contracted.

According to the conventional structure as described above, the conductor B is housed in a rail shape in the inner tube side storage portion provided integrally with the inner tube, so that the inner tube side storage portion can be made thinner. Thus, the entire storage space can be reduced.

FIG. 6 (2) shows, for example, Japanese Unexamined Patent Publication No.
It is sectional drawing which shows the structure of the conventional extension pipe disclosed by 24003 publication. In the figure, a connection terminal A and a connection terminal B are connected by a flexible flat cable 33,
By bending the flat cable 33, the bent position of the flat cable 33 is displaced in accordance with the expansion and contraction of the extension tube, and the power supply function is maintained.

According to the structure described above, it is said that sagging of the conductor due to repeated expansion and contraction and creep due to heat can be prevented.

[0008]

However, in the conventional vacuum cleaner described in Japanese Patent Application Laid-Open No. 9-24002, in addition to the connection between the connection terminal A12 and the conductor A31, the conductor A31 Connection of contact 32, connection terminal b
There are many mechanical connections or contact points, such as the connection between the conductor 15 and the rail-shaped conductor b30, and the contact between the contact 32 and the conductor B30, which must include many factors that lower reliability.

In the vacuum cleaner described in Japanese Patent Application Laid-Open No. 9-24003, the connection between the connection terminal A12 and the flat cable 33 and the connection between the connection terminal B15 and the hula cable 33 are required. The connection terminal A12 and the connection terminal B15 are composed of a male terminal in the form of a product and a female terminal terminal using metal elasticity for receiving the male terminal. A connector is required to connect each terminal to the flat cable. The part requires some space.

Further, since the surfaces of the flat cable are in contact with each other, the reliability may be impaired in terms of insulation due to friction or the like accompanying sliding.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a vacuum cleaner having an extension tube which can be reduced in size with high reliability. .

[0012]

SUMMARY OF THE INVENTION A vacuum cleaner according to the present invention has one end of a hose connected to the main body of the cleaner and a conductor connected to a floor brush and supplying power to an electric load such as a rotating brush in an axial direction. In a vacuum cleaner provided with an extension pipe that is connected to and extends with a pipe to be extended, the lead wire is installed in a shape that makes a U-turn along the outer pipe, and is configured to be movable according to a change in the length of the extension pipe. The bending position for making a U-turn can be freely displaced.

Also, a lead wire installed in a U-turn shape along the outer tube is slidably provided so as to be bridged between the connecting tube portion and the outer tube. The lead wire is not rubbed by extension and contraction of the extension tube (relative movement between the connection tube portion and the outer tube).

[0014] A lead wire restricting rib provided at a height at least corresponding to the width of the lead wire and in a desired width in parallel with the sliding direction. The structure is restricted, and the U-turn portion of the lead wire can be prevented from catching on other parts.

Further, since a part of the lead wire is fixed to the lead wire regulating rib, the lead wire can be prevented from floating.

Also, a lead wire arranged in a U-turn shape along the outer tube, and / or a lead inserted in a bridge shape between the connecting tube portion and the outer tube and having one end slidably provided. The wire holding member is provided with a rail-shaped rib of a desired length that slides in contact with the outer tube, and can be supported with a reduced sliding contact area.

Further, since the lead wire has an eyeglass wire structure, unnecessary twisting does not occur.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a plan view showing the periphery of a lead wire in an extended state and a shortened state according to the first embodiment of the present invention, FIG. 2 is a side view and a side sectional view showing the extended state of the first embodiment, and FIG. It is a cross-sectional view which shows the outer tube and lead wire holding member of Embodiment 1.

Here, the vacuum cleaner according to the present invention is shown in FIG.
As shown in FIG. 3, an extension pipe 4 connected to one end of a hose 2 connected to the cleaner body 1 and a pipe 18 connected to the floor brush 3 and axially containing a conductor for supplying an electric load such as a rotating brush to the electric load. Have.

The extension pipe 4 has a basic structure that is made expandable and contractable by an outer pipe 5 and an inner pipe 6 that slides inside the outer pipe 5. There is an intermediate pipe 7 and an outer pipe 5
And a packing 8 for maintaining the airtightness of a sliding portion between the inner pipe 6 and the inner pipe 6.

On the lower surface of the inner tube 6, recesses are provided at desired intervals. The outer tube 5 is provided with locking members 9 near the insertion opening of the inner tube 6, and the locking members 9 are provided in the recesses of the inner tube. Can fix the position of the inner pipe 6 with respect to the outer pipe 5. The locking body 9 rotates about an axis, and a spring 11 as a repelling material is provided below the operation unit 10. When the operation unit is pressed down against the resilience of the spring 11, the locking unit 9 is set inward. The inner tube 6 can slide freely with respect to the outer tube 5 by separating from the concave portion of the tube.

The outer tube 5 has a structure in which one end thereof can be connected to the hose 2. On the upper surface of the connecting portion, the power supply from the cleaner body 1 to the floor brush 3 is connected via the hose 2. A pair of metal pins 13 are attached as connection terminals.

A lead wire 14 is crimped to the metal pin 13, and the other end of the lead wire 14 is soldered or connected to a metal plate terminal 16 as a connection terminal for electrical connection to the floor brush 3. Spot welded.
The metal plate terminal 16 is connected to the connection pipe 1 at the tip of the inner pipe 6.
7 attached to the upper surface. The lead wire 14 is 2
It has a so-called spectacle line structure in which one line is integrated.

The sliding portion of the inner tube 6 with the outer tube 5 is circular, but the connecting tube portion 17 with the pipe 18 connected to the floor brush 3 can be connected with the pipe 18 inside. And is thicker than the sliding part.
The pipe 18 of the floor brush 3 is provided on the upper surface of the connecting pipe 17.
Is mounted together with a spring 20. The metal plate terminals 16 described above are provided on both sides thereof.

The lead wire 14 is connected to the metal plate terminal 1.
From the side 6, a desired length is bridged over the upper surface between the connection pipe 17 and the outer pipe 5, and is supported by the installed strip-shaped lead wire holding member 21.

The position of the lead wire holding member 21 is fixed by making a round hole at the end thereof into a screw boss provided on the connection pipe 17 on the connection pipe 17 side.
The side moves parallel to the sliding direction on the outer tube 5 while the left and right sides are regulated by the sliding control rib 22 provided at a desired length in parallel with the sliding direction on the upper surface of the outer tube 5. It has become.

Also, two rail-shaped ribs 34 of a desired length provided in parallel on the upper surface of the outer tube 5 at a position narrower than the slide regulating rib 22 reduce the sliding contact area on the lower surface of the lead wire holding member 21. And a smooth operation can be obtained, and the resistance of the lead wire 14 against sliding when one side contacts the upper surface of the outer tube 5 is reduced.

The lead wire 14 is inserted and fixed at a desired position in a groove 23 provided in the length direction of the lead wire holding member 21.

The lead wire 14 is provided on the upper surface of the outer tube 5 at an interval which is not narrower than the slide regulating rib 22 and is provided at a height at least corresponding to the width of the lead wire 14 and in a desired width in parallel with the sliding direction. Between the lead wire restricting ribs 24, it is installed in a shape that goes from the floor brush 3 side to the hose 2 side (upward on the paper surface in FIGS. 1 and 2) and makes a U-turn toward the floor brush 3 side.

Further, the lead wire 14 is fitted in a rib groove 25 provided in the lead wire regulating rib 24 to be fixed in position, and is returned to the hose 2 to return to the metal pin 1.
It is connected to 3. In this case, the length of the lead wire 14 is adjusted so that it cannot be extended when the extension tube 4 is extended to the maximum.

In the lead wire 14 configured as described above, since the U-turn portion and the metal pin connection portion are separated by the lead wire restricting rib 24, the surfaces of the lead wires 14 are brought into contact friction with sliding. As a result, insulation failure does not occur.

The components and the lead wire holding member 21 arranged on the upper surface of the connecting pipe portion 17 are provided with an inner pipe side cover 26.
Are housed in an inner tube side storage portion formed by covering in a lid shape. The inner tube side cover 26 is fixed to the inner tube 6 with screws.

The upper surface of the outer tube 5 is covered with an outer tube side cover 27.
Is fixed, and constitutes an outer tube side storage portion that covers the lead wire 14 and the metal pin 13.

As a result, when the inner tube 6 slides inside the outer tube 5, the lead wire holding member 21 is also synchronized with the inner tube 6 and
To slide outside. At this time, the lead wire 14 changes its length by sliding while displacing the U-turn-shaped bending position in the space surrounded by the upper surface of the outer tube 5, the inner surface of the outer tube side cover 27, and the right and left lead wire regulating ribs 24. Perform an operation that can respond to.

At this time, the lead wire regulating rib 24 is close to the inner surface of the outer tube side cover 27 and regulates the space, so that the U-turn portion of the lead wire 14 catches with other parts,
The function to cope with the sliding change is not affected.

The lead wire regulating ribs 24 also serve to support the outer tube side cover 27 from the inside and secure the strength even when the outer tube side cover 27 is deformed by an external force.

Embodiment 2 FIG. 4 is a plan view showing the vicinity of an extended internal lead wire according to the second embodiment of the present invention.
In the first embodiment, the lead wire 14 is configured to be fitted in the rib groove 25 provided in the lead wire regulating rib 24 and fixed in position.

In the second embodiment, the lead wire 14
Hose 2 from floor brush 3 side between lead wire regulating ribs 24
It is installed in a shape that makes a U-turn toward the floor brush 3 toward the side, and is folded outward at the end of the lead wire regulating rib 24,
It comes into contact with the side surface of the lead wire regulating rib 24 and returns to the hose 2 side, and is connected to the metal pin 13.

At this time, the lead wire 14 returning to the hose 2 side can be satisfactorily fixed by attaching it to the lead wire regulating rib 24 with an adhesive.

The present invention is not limited to the above embodiments. For example, the length of the lead wire holding member, the slide regulating rib, the length of the lead wire regulating rib may be appropriately changed, The design may be changed as appropriate such as changing the fixing means and the fixing position, changing the shape and position of each component.

[0041]

As described above, according to the present invention, the configuration is such that the lead wire is installed in a U-turn shape along the outer tube and can be moved according to the change in the length of the extension tube. Bend position can be freely displaced, connecting parts for conducting electricity are reduced as much as possible, and its electrical reliability is increased.In addition, the number of components of conductive members is reduced, and the size and weight are reduced by eliminating unnecessary connector members. Can be achieved. Further, by avoiding contact between the surfaces of the conductive members, reliability against insulation failure or the like due to wear or the like can be improved.

A lead wire arranged in a U-turn along the outer tube is bridged between the connecting tube portion and the outer tube and supported by a slidable lead wire holding member. With such a configuration, the lead wires are not rubbed by extension and contraction of the extension pipe (relative movement between the connection pipe portion and the outer pipe), and the reliability against insulation failure and the like can be further improved.

Also, at least a lead wire restricting rib provided at a height corresponding to the width of the lead wire and in a desired width in parallel with the sliding direction, and a lead wire arranged in a U-turn along the outer tube is provided on both sides. Since the configuration is restricted, it is possible to prevent the U-turn portion of the lead wire from being caught by other components, to reduce the occurrence of trouble in the function of responding to sliding change, and to obtain the same effect as above.

Further, since a part of the lead wire is fixed to the lead wire regulating rib, it is possible to prevent the lead wire from floating, and the effect of the above is more reliable.

Also, a lead wire arranged in a U-turn along the outer tube, and / or a lead inserted in a bridge shape between the connecting tube portion and the outer tube and having one end slidably provided. Since the wire holding member is provided with a rail-shaped rib of a desired length that slides in contact with the outer tube, it can be supported with a reduced sliding contact area, smooth operation is obtained, and sliding resistance is reduced. And the same effect as above can be obtained.

Also, since the lead wire has an eyeglass wire structure,
Unnecessary twisting does not occur, and the above effect can be further improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing the periphery of a lead wire in an extended state and a shortened state according to Embodiment 1 of the present invention.

FIGS. 2A and 2B are a side view and a side sectional view showing an extended state of the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an outer tube and a lead wire holding member according to the first embodiment of the present invention.

FIG. 4 is a plan view showing a periphery of an internal lead wire in an extended state according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing the entire configuration of the embodiment of the vacuum cleaner.

FIG. 6 is a side sectional view showing a conventional embodiment.

[Explanation of symbols]

1 Vacuum cleaner body, 2 Hose, 3 Floor brush, 4
Extension pipe, 5 outer pipe, 6 inner pipe, 7 intermediate pipe,
8 Packing, 9 Locking body, 10 Operation part, 11 Spring, 12 Connection terminal A, 13 Metal pin, 14 Lead wire, 15 Connection terminal B, 16 Metal plate terminal, 1
7 connection pipe part, 18 pipes, 21 lead wire holding members,
22 Sliding control rib, 23 groove, 24 Lead wire control rib, 25 rib groove, 26 Inner tube side cover, 27 Outer tube side cover, 28 Inner tube side storage, 29 Outer tube side storage, 3
0 conductor B, 31 conductor A, 32 contacts, 33 flat cable, 34 rail-shaped rib.

Claims (6)

[Claims] 1. An end of a hose connected to a cleaner body,
In a vacuum cleaner provided with an extension tube which is connected to a floor brush and is provided with an electric conductor for supplying an electric load such as a rotary brush for supplying an electric load in an axial direction and which is provided with an extension tube which expands and contracts, a lead wire extends along the outer tube. A vacuum cleaner, which is installed in a turning shape and is configured to be movable according to a change in the length of an extension pipe. 2. An end of a hose connected to the cleaner body,
In a vacuum cleaner provided with an extension tube which is connected to a floor brush and is provided with an electric conductor for supplying an electric load such as a rotary brush for supplying an electric load in the axial direction, and which extends and contracts,
Electrical cleaning characterized in that a lead wire installed in a turnable shape is bridged between a connecting pipe portion and an outer pipe and supported by a slidable lead wire holding member. Machine. 3. An end of a hose connected to the cleaner body,
In a vacuum cleaner provided with an extension tube that is connected to a floor brush and that extends and contracts by connecting a conductor that supplies an electric load such as a rotating brush to an electric load in an axial direction, at a height corresponding to at least a width of a lead wire. A vacuum cleaner characterized in that a lead wire provided in a shape that makes a U-turn along the outer tube is regulated on both sides by a lead wire regulating rib provided in a desired width in parallel with the sliding direction. 4. The vacuum cleaner according to claim 3, wherein a part of the lead wire is fixed to the lead wire regulating rib. 5. An end of a hose connected to the cleaner body,
In a vacuum cleaner provided with an extension tube which is connected to a floor brush and is provided with an electric conductor for supplying an electric load such as a rotary brush for supplying an electric load in the axial direction, and which extends and contracts,
A lead wire installed in a turning shape, and / or a lead wire holding member slidably provided on one end side and inserted in a bridge shape between the connection pipe portion and the outer pipe slides upon contact. An electric vacuum cleaner wherein a rail-shaped rib having a desired length is provided on an outer tube. 6. The vacuum cleaner according to claim 1, wherein the lead wire has an eyeglass wire structure.