JP3129309B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner using an extension tube which can be extended and contracted and which can be electrically connected.

[0002]

2. Description of the Related Art A conventional extension tube for an electric vacuum cleaner is disclosed in Shokai 6
There was a configuration shown in 1-116449. The configuration of this extension pipe will be described with reference to FIGS. In FIG. 14, reference numeral 3 denotes a telescoping extension pipe composed of an inner pipe 4 and an outer pipe 5. 9 is a plug 10, 11 at both ends
By connecting one plug 10 to the connection portion of the suction device and the other plug 11 to the connection portion of the hand switch portion, the suction device side and the cleaner main body side are connected by a hand switch. Electrical connection through the unit. The extension cord 9 is provided with a coil portion 9a by curling, and the coil portion 9a is always in a stored state and is extended by an external force. 12 is a core attached to the inner tube 4.
Reference numeral 13 denotes a code clip which is integral with or separate from the outer tube 5, and the extension code 9 is engaged with the code clips 12 and 13 at both ends with the coil portion 9a as a boundary. By holding it, it is supported by the inner and outer tubes 4 and 5, respectively.

In the above construction, the extension tube 3 is normally stored with the inner and outer tubes 4 and 5 contracted as shown in FIG.
a is located along the extension tube in a contracted state. Next, when using the extension tube 3, the lock button 14 is operated to extend the inner and outer tubes 4 and 5 as shown in FIG. 9a is also extended. Thus, the extension cord 9 is configured to expand and contract according to the extension and contraction states of the extension tube 3.

[0004]

However, in the conventional construction, the extension cord 9 is attached to the outer peripheral side of the extension pipe 3 so as to be exposed, so that the extension cord 9 gets caught on an object during the cleaning operation. However, the extension cord 9 was apt to be damaged, and there was a problem in durability and safety. In addition, at the time of storage, etc., the inner and outer pipes 4 of the extension pipe 3,
The extension cord 9 was also exposed when 5 was in a contracted state, and the appearance was poor, the object was easily caught or damaged, and the storage was poor.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a vacuum cleaner which does not impair the cleaning workability and is excellent in durability, safety and storage.

[0006]

In order to achieve the above object, the present invention comprises a hose connected to a cleaner body, a floor nozzle, and an extension pipe connecting one end of the hose to the floor nozzle. The extension tube is provided with an outer tube provided with a connection terminal A at one end, an inner tube slid in the outer tube and having a connection terminal B at an end, and electrically connecting the connection terminal A and the connection terminal B. a conductor connecting integrally in the axial direction a and one side surface of the inner tube
And accommodates the inner tube side portion of the conductor.
And the inner tube-side housing section which is partitioned intake passage, outside the conductor
The outer tube side storage part for storing the tube side part has a gap on the inner surface of the outer tube.
A cylindrical body provided and arranged, and an end of the cylindrical body
Inserting the inner tube into the gap by inserting it into the side storage section,
The inner pipe is slidable in the outer pipe, and the
The conductor is led out from the cylindrical body to the inner tube side storage portion, and at least a part of the conductor is formed of a stretchable member. And while forming the inner pipe side storage part which stores a part of the said conductor integrally with the inner pipe in the axial direction and one side surface of the inner pipe, it is slidable inside the inner pipe side storage part, and Since the outer tube-side storage portion for storing the conductor is disposed in the outer tube, the conductor is covered by the storage portion, so that the strength, durability and safety are improved without external force applied to the conductor, and the appearance is improved. Is also improved. When the inner tube is pulled out of the outer tube, the inner tube-side storage portion is provided integrally, so that the strength of the inner tube-side storage portion is high, and the inner tube-side storage portion is further provided in the outer tube-side storage portion. In a state in which is stored, a double wall is formed to further improve the strength, and the conductor can be sufficiently protected against external force. Further, since at least a part of the conductor is formed of a stretchable member, the moving distance of the outer tube-side storage portion in the inner tube-side storage portion is absorbed by the stretchable conductor,
Since unreasonable tension is not applied to other portions of the conductor and the electrical connection portion, durability and reliability of the conductor are improved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION
A hose connected to the cleaner body, a floor nozzle, an extension pipe connecting one end of the hose to the floor nozzle, the extension pipe being provided with a connection terminal A at one end; An inner tube that slides in the tube and has a connection terminal B at an end, and a conductor that electrically connects the connection terminal A and the connection terminal B
And extending integrally with one side in the axial direction of the inner pipe.
While accommodating a portion of the conductor on the inner tube side and an intake passage
Partitioned inner tube side storage part and outer tube side part of the conductor
The outer tube side storage part for storing
And an end portion of the cylindrical body in the inner tube side storage portion.
To allow the inner tube to enter the gap,
It is slidable in the outer tube, and the inner
The conductor is led out to the tube-side storage part, and at least a part of the conductor is formed of a stretchable member. And
An inner tube-side housing portion for housing a part of the conductor integrally with the inner tube is formed in the axial direction and on one side of the inner tube, and the inner tube-side housing portion is slidable in the inner tube-side housing portion and the conductive member. The outer tube side storage part that stores the body is arranged in the outer tube, so the conductor is covered by the storage part, so the strength, durability, safety, and appearance are improved without applying external force to the conductor. Is what you do. Also, when the inner tube is pulled out from the outer tube, the inner tube side storage part is provided integrally, so
The strength of the inner tube side storage part is high, and when the inner tube side storage part is stored in the outer tube side storage part, it becomes a double wall and the strength is further improved, and the conductor is sufficiently protected against external force Can be. In addition, since at least a part of the conductor is formed of a stretchable member, the moving distance of the outer tube-side storage portion in the inner tube-side storage portion is absorbed by the stretchable conductor, and the other portion of the conductor is Also, since excessive tension is not applied to the electrical connection portion, the durability and reliability of the conductor are improved.

According to a second aspect of the present invention, there is provided an adjusting means for regulating the position of the inner pipe in the outer pipe, and the adjusting means is provided on the inner pipe side and formed in a plurality in the axial direction of the inner pipe. An operating body provided on the outer tube is operated because it is composed of a locking portion, a locking body provided on the outer tube side and locking the locking portion, and an operating body for operating the locking body. By doing so, it is possible to freely engage and disengage the locking body and the plurality of locking portions on the inner tube side,
The length of the conductor is adjusted so that the outer tube and the inner tube can be freely expanded and contracted, and the outer tube and the inner tube can be fixed to a required length.

In the invention according to claim 3 of the present invention, since the locking portion is disposed on the side opposite to the inner tube side storage portion forming side, it is not necessary to form the locking portion in the inner tube side storage portion. Since it does not affect the storage space for the conductor in the tube-side storage section, each configuration can be simplified, the size can be reduced, and the assemblability can be improved.

In the invention according to claim 4 of the present invention, since the locking portion is provided in the inner tube side storage portion, by operating the operating body provided on the outer tube, the locking member and the inner tube side can be moved. Can be freely engaged with and disengaged from the locking portion, the outer tube and the inner tube can be freely expanded and contracted, and the outer tube and the inner tube can be fixed to a required length. Further, since the locking portion is provided on the outer periphery of the inner tube side storage portion provided integrally with the inner tube, the strength and durability are improved, and an external force in the axial direction is carelessly applied to the inner tube. Even when the locking portion and the locking body do not come off, the extension tube is prevented from shrinking during use, and the usability can be improved.

[0011]

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. First, the overall configuration of the vacuum cleaner will be described with reference to FIG. As shown in the drawing, one end of a hose 202 is connected to a suction port of a cleaner body 201 having a built-in electric blower (not shown), and a hand 203 provided at the other end of the hose 202 is used. The operation of the electric blower in the cleaner body 201 is operated. Conductive wires (not shown) are arranged in the hose 202,
The hand unit 203 and the cleaner body 201 are electrically connected.

A telescopic extension tube 204 is provided at the hand portion 203.
As shown in the figure, the extension tube 204 is composed of an outer tube 205 connected to the proximal portion 203, and an inner tube 206 inserted in the outer tube 205 so as to be movable in the axial direction.
An end of the inner tube 206 is connected to a floor nozzle 208 having a built-in electric brush 207 as an electric load. Extension tube 20
4 is also provided with an inner tube side storage portion A360 in the axial direction, a conductor 359 is arranged in the inner tube side storage portion A360, and power is supplied from the hand portion 203 to the electric brush 207 of the floor nozzle 208. I have. 217 is the inner tube 206 in the outer tube 205
Is an adjusting means for adjusting the position of.

A connection terminal B211 electrically connected to the floor nozzle 208 is provided at a connection portion B206a of the inner tube 206, and an inner tube-side housing integrally extended in the axial direction and on one side of the inner tube 206. It is electrically connected to the conductor 359 formed in the portion A360. Also, provided on the outer tube 205,
On the connection part A205a side connected to the hand part 203 side,
A connection terminal A210 for electrical connection is provided.
9 is electrically connected. The conductor 359 is the outer tube 20
5 is a cylindrical body 361 which is an outer tube side storage portion extending in the axial direction.
Is arranged within. As described above, the electric power is supplied between the hand portion 203 and the floor nozzle 208 by the conductor 359 disposed on the extension tube 204. It can also be used as a signal line to the signal 208.

The cylindrical body 361 has one end attached to the outer tube 205 and the other open end inserted into the inner tube-side accommodating portion A360, so that the cylindrical member 361 is slidable in the inner tube-side accommodating portion A360. It is configured. Further, the conductor 359 is formed of a telescopic member in which a part (on the inner tube side storage section A360 side) is formed in a coil shape.

With the above configuration, the inner tube 206 is connected to the outer tube 205
The conductor 359 is rounded in a coil shape as it is pushed into the cylinder 361, and the overall length is shortened and the cylindrical body 361 of the outer tube 205 is pressed.
Part of the inside of the inner tube side storage portion A360.

FIG. 3 shows a state in which the inner tube 206 is pulled out most, and FIG. 5 shows a state in which the inner tube 206 is pushed into the outer tube 205. The inner tube side storage portion A360 is moved by the moving distance of the inner tube 206. Inside, the conductor 359 is elongated and compressed in a coil shape.

Further, since the inner tube-side storage portion A360 extends integrally in the axial direction and on one side of the inner tube 206, the rigidity of the inner tube 206 having a smaller inner diameter than the outer tube 205 is increased, and external force is reduced. Even if it is applied, it is not easily deformed, and no force is applied to the conductor 359, and the durability of the conductor 359,
Reliability can be improved.

The portion where the conductor 359 is made to be an extensible member is desirably the inner tube side storage portion A360 having a large space.
59 may be provided, and there is no problem even if an elastic member is used over the entire conductor 359.

As a method of forming the cylinder 361 in the outer tube 205, the outer tube 205 may be molded of resin and the same cylinder 361 may be molded at the same time.
05 may be fixed at a predetermined location. In particular, when the cylinder 361 is formed of a separate member, the material of the outer tube 205 may be resin or aluminum or another metal.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIG. As adjusting means 217, a plurality of locking portions 212 provided in the axial direction of the inner tube 206, a guide member 213 fixed to the end of the outer tube 205 on the inner tube 206 side, and an opening 216b provided in the outer tube 205 A locking member 214 that can freely move out of the way and is engaged with the locking portion 212; a restraining member 215 that presses the upper portion of the locking member 214 and locks the outer tube; and an operation of manually displacing the restraining member 215 The body 216 is formed. A spring body 216a always biases the operation body 216 toward the inner tube 206. The electrical connection inside the extension tube 204 is the same as that of the first embodiment, and therefore will not be described.

The operation of the adjusting means 217 is as follows. When the operating body 216 is urged leftward by the spring body 216a, the locking body 21 is passed through the opening 216b by the restraining body 215 fixed to the operating body 216.
4 is pressed against the locking portion 212, and the inner and outer tubes 205, 206
Sliding between them is prevented.

On the other hand, in order to release the blocking, FIG.
As shown in (b), when the operating body 216 is moved to the right by a finger against the urging force of the spring body 216a, the restraining body 215 is moved.
As a result, the pressure contact of the locking body 214 is released, and the locking body 214 is disengaged from the locking part 212, so that the inner and outer tubes 206 and 205 can slide freely.

In the above embodiment, the shape of the locking portion 212 is concave. However, it is not necessary to limit the shape to a concave shape. A plurality of convex portions are provided, and the locking body 214 is locked between the convex portions. Is also good.

Although the locking portion 212 is formed in a groove shape and the locking member 214 is formed in a round bar shape, the locking portion 212 may be formed in a concave shape and the locking member 214 may be formed in a spherical shape. May be set arbitrarily.

With the above configuration, the length of the extension tube 204 can be freely set by the adjusting means 217 for fixing the expansion and contraction of the inner tube 206. At this time, the conductor B359 is expanded with the expansion and contraction of the inner tube 206. Shrinks, inner tube side storage section 3
The extension pipe 2 is easily moved by moving inside the extension pipe 60.
04 can be adjusted and fixed.

(Embodiment 3) A third embodiment will be described with reference to FIGS. In the figure, a locking portion 212 provided on the inner tube 206 and a locking body 214 provided on the outer tube 205 side are arranged on the opposite side of the inner tube side storage portion A360.

With the above configuration, the locking portion 212 and the locking body 2
14 and the inner tube side storage portion A360 are formed separately from each other, and each configuration is independent, so that the configuration is simplified, miniaturization and improvement in assemblability can be achieved.

(Embodiment 4) Next, a fourth embodiment of the present invention will be described with reference to FIGS.

Reference numeral 217 denotes adjusting means for adjusting the position of the inner tube 206 in the outer tube 205.
The locking portion 212 provided at the end of the inner tube side and engaged with the locking body 214 built in the adjusting means 217 is provided in the inner tube side storage portion A.
It is provided on the outer peripheral surface of 360. In addition, the inner tube side storage portion A360 is formed integrally with the inner tube 206.

With the above configuration, the locking portion 212 is
6 is provided on the outer periphery of the inner tube side storage portion A 360 integrally provided with the inner tube 6, so that the strength and durability are improved, and even if an external force in the axial direction is carelessly applied to the inner tube 206, the locking portion is provided. 21
2 and the locking member 214 do not come off, so that the extension tube 204 can be prevented from suddenly shrinking during use.

[0031]

According to the present invention, strength, durability and safety are improved and external appearance is improved without external force being applied to the conductor by the storage portion. In addition, the strength of the inner tube side storage part is high, and furthermore, the inner wall side storage part is stored in the outer tube side storage part in a double wall, and the strength is further improved,
The conductor can be sufficiently protected against external force. In addition, since at least a part of the conductor is made of a stretchable member, no excessive tension is applied to the electrical connection portion of the conductor, so that the durability and reliability of the conductor are improved.

[Brief description of the drawings]

FIG. 1 is an overall view of a vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is a side view of the extension pipe of the vacuum cleaner showing the first to third embodiments of the present invention.

3A is a cross-sectional view of a main part of FIG. 2B, and FIG.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view of a main part of the extension pipe.

FIG. 6 is a sectional view of a main part of an extension pipe of a vacuum cleaner showing a fourth embodiment of the present invention.

FIG. 7 is a sectional view taken along line BB of FIG. 6;

FIG. 8 is a side view of an extension pipe of a vacuum cleaner showing a conventional example.

FIG. 9 is a side view showing a state where the extension pipe is extended.

[Explanation of symbols]

 204 Extension tube 205 Outer tube 205a Connection part A 206 Inner tube 210 Connection terminal A 211 Connection terminal B 212 Locking part 216 Operating body 217 Adjusting means 359 Conductor 360 Inner tube side storage part 361 Tube (outer tube side storage part)

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hidenori Kitamura 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. In-company (72) Inventor Masakazu Onda 1006 Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-250129 (JP, A) JP-A-4-189337 (JP, A) JP-A-6-30872 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/24

Claims (4)

(57) [Claims] 1. A hose having a hose connected to a cleaner body, a floor nozzle, and an extension pipe connecting one end of the hose to the floor nozzle, wherein the extension pipe has a connection terminal A at one end. a tube, an inner tube having a connection terminal B of the outer tube to the only One end sliding, and conductor for electrically connecting the connection terminal B and the connection terminal a, the axial direction of the inner tube and one integrated on the side
And extend to accommodate the inner tube side portion of the conductor.
And the inner tube-side housing section which is partitioned intake passage, of the conductor
The outer tube side storage part that stores the outer tube side part has a gap on the inner surface of the outer tube
And a cylindrical body provided with
Insert into the tube side storage part and insert the inner tube into the gap
To make the inner tube slidable in the outer tube,
A vacuum cleaner in which a conductor is led out from the cylindrical body to an inner tube side storage portion, and at least a part of the conductor is formed of a member that can be extended and retracted. 2. An adjusting device for regulating the position of the inner tube in the outer tube, wherein the adjusting device is provided on the inner tube side, and a plurality of locking portions are formed in the axial direction of the inner tube; Provided in
The vacuum cleaner according to claim 1, comprising a locking body that locks the locking portion, and an operating body that operates the locking body. 3. The vacuum cleaner according to claim 2, wherein the locking portion is disposed on a side of the extension tube opposite to the inner tube side storage portion. 4. The vacuum cleaner according to claim 2, wherein the locking portion is provided in the inner tube side storage portion of the extension tube.