JP2000350686A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner having an optimum hose, in which exhaust from a motor-driven fan incorporated in a cleaner body flows back to a suction piece, or the like, via a hose and a pipe. SOLUTION: In this vacuum cleaner, a hose 21, a pipe and a suction piece connected to a cleaner body having a motor-driven fan built in have formed therein an intake flow passage and an exhaust flow passage through which exhaust from the motor-driven fan flows back. The hose 21 comprises an outer hose 22 and an inner hose 23 and has formed therein the exhaust flow passage and the intake flow passage. Flexible hoses each constructed of a long member wound into a tubular shape are used as the outer hose 22 and the inner hose 23, and the inner hose 23 and the outer hose 22 are wound in the same direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly to an exhaust gas recirculation (circulation) type in which exhaust gas from an electric blower built in a vacuum cleaner body is returned to a suction tool or the like via a hose and a pipe. Related to the vacuum cleaner.

[0002]

2. Description of the Related Art In general floor moving type vacuum cleaners, all exhaust air from an electric blower built in the cleaner body is discharged to the outside through an exhaust port formed on the back side of the body. However, since all exhaust air from the electric blower is exhausted, it is blown out to the outside with considerable force. Therefore,
The exhaust air causes dust that stagnates on the floor or carpet to soar up and diffuses throughout the room.

For the purpose of reducing the exhaust air blown to the outside and increasing the dust collecting effect, conventionally, for example, Japanese Utility Model Publication No. 39-36553 and Japanese Patent Application Laid-Open No. Hei 9-135.
As disclosed in Japanese Patent Application Publication No. 795 and the like, a hose, a pipe, and a suction tool connected to the cleaner body are formed with an exhaust passage for recirculating a part or all of the exhaust from the electric blower together with the intake passage. An electric vacuum cleaner comprising:

[0004] In the above, the hose and the pipe are formed in a double structure so that an intake passage is formed inside and an exhaust passage is formed outside. Was not considered at all.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to an electric power supply having an optimum hose in which the exhaust air from an electric blower incorporated in a cleaner body is returned to a suction device or the like via a hose and a pipe. It is an object to provide a vacuum cleaner.

[0006]

Means for Solving the Problems A first method for solving the above problems is described below.
Means is a vacuum cleaner in which a hose, a connecting pipe, and a suction tool connected to a cleaner body having a built-in electric blower are provided with an intake flow path and an exhaust flow path for recirculating exhaust gas from the electric blower. A flexible hose formed of an outer hose and an inner hose to form an exhaust passage and an intake passage, and a tubular member formed by winding a long member around the outer hose and the inner hose. The winding direction of the inner hose and the winding direction of the outer hose are the same.

In the above structure, it is preferable that an intake passage is formed by the inner hose and an exhaust passage is formed between the outer hose and the inner hose.

A hose connecting portion having a double structure comprising an outer pipe and an inner pipe is provided at a connecting portion between the cleaner body and the hose, and the hose is engaged with the outer circumference of the outer pipe and the outer circumference of the inner pipe. It is preferable that the engaging portions are provided so as to be inclined with respect to the tube axis direction, and the inclinations of the engaging portions are desirably set in the same direction.

[0009] A hose connecting portion having a double structure comprising an outer pipe and an inner pipe is provided at a connecting portion between the pipe and the hose, and the hose is engaged with the outer circumference of the outer pipe and the outer circumference of the inner pipe. The engaging portions are provided so as to be inclined with respect to the tube axis direction, and the inclination of the engaging portions is set to be the same.

It is preferable that the outer pipe and the inner pipe of the hose connection part are formed separately.

It is desirable that the inner pipe be rotatably supported on the outer pipe.

[0012]

1 to 8 show a first embodiment of the present invention. Hereinafter, description will be made with reference to these drawings.

Reference numeral 1 denotes a cleaner body, which comprises an upper case 2, a lower case 3, and a dust collecting cover 4, as shown in FIG.
The front side of the cleaner body 1 is formed with a hose connection port 5 to which a later-described body side hose connection portion 17 is connected, and the rear side is formed with a slit-shaped exhaust hole 6. The bottom inside the cleaner body 1 is separated from the upper space in the cleaner body 1 by a partition wall 7 and has an exhaust passage B1 communicating with the hose connection port 5 and an external exhaust flow communicating with the exhaust hole 6. A road C is formed. A partition wall 8 that partitions the space above the partition 7 back and forth is provided upright on the partition 7.

Reference numeral 9 denotes a dust collecting chamber formed on the front side of the partition wall 8, and has a hose insertion port 9a formed concentrically with the hose connection port 5 on the front side. A dust collecting bag mounting case 11 for detachably fixing the dust collecting bag 10 is detachably housed in the dust collecting chamber 9, and the opening of the dust collecting bag 10 is connected to a hose of the dust collecting chamber 9 in a mounted state. It is made to face the insertion port 9a.

Reference numeral 12 denotes a fine dust filter attached to the partition wall 8, which is located on the rear side of the dust collecting bag 10 and removes fine dust.

Reference numeral 13 denotes an electric blower storage chamber formed on the rear side of the partition wall 8, and an electric blower 14 is stored therein. An opening 13a is formed below the motor housing 13 so as to communicate the motor housing 13 with the exhaust flow path B1 and the external exhaust flow path C. Is diverted by the ribs 15 erected on the lower case 3 and is guided from the opening 13a to the hose connection port 5 side via the exhaust passage B1, and a part of the exhaust gas is discharged from the opening 13a. Road C,
The air is exhausted from the cleaner body 1 through the exhaust hole 6 through an exhaust filter 16 provided in the exhaust hole 6.

Reference numeral 17 denotes a main body-side hose connection portion which is connected to a hose 21 described later and is mounted on the hose connection port 5.
As shown in FIG. 4, the outer pipe 18 has a double structure including a cylindrical outer pipe 18 and an inner pipe 19 formed integrally with the outer pipe 18 by a plurality of support ribs 19a.

At one end of the outer pipe 18 attached to the hose connection port 5 is formed a locking claw 18a which is locked by a locked portion 5a provided at the hose connection port 5, while the other end is provided. On the side, a screw-shaped outer rib 18b is formed to be inclined with respect to the tube axis direction.

The inner pipe 19 is formed to be longer than the outer pipe 18 so that one end attached to the hose connection port 5 projects from the hose insertion port 9a into the dust collection chamber 9. On the other hand, the other end is formed to be longer than the outer pipe 18,
An inner rib 19b that is inclined in the same direction as the outer rib 18b of the outer pipe 18 is formed on the outer peripheral side. Reference numeral 20 denotes a cylindrical cover provided so as to cover the side of the main body side hose connection portion 17 to which the hose 21 is connected.

The main body-side hose connection portion 17 locks the locking claw 18a to the hose connection port 5 of the cleaner main body 1, thereby forming the inner pipe 19 of the main body-side hose connection portion 17.
Protrudes into the dust collecting chamber 9 and communicates with the inside of the dust collecting chamber 9, and the inside of the inner pipe 19 serves as an intake passage A 2. Further, the outer pipe 18 communicates with an exhaust flow path B1 in the cleaner body 1, and a space between the outer pipe 18 and the inner pipe 19 becomes an exhaust flow path B2.

Reference numeral 21 denotes a hose attached to the main body-side hose connection portion 17 and a hose connection portion 27 which will be described later, and has a double structure comprising an outer hose 22 and an inner hose 23 as shown in FIG.

The outer hose 22 is formed in a tubular shape by spirally winding a long member as shown in FIG.
Spiral protrusions 22b and 22c are formed on the joint 22a and the elongated member, respectively. A conductive coil 22d as a signal line is provided in the protrusion 22b, and a coil wire 22e having shape retention is provided in the protrusion 22c. The strength of the hose 21 is maintained by the coil wires 22d and 22e of the outer hose 22. The outer hose 22 is formed of a translucent material.

On the other hand, the inner hose 23 is formed in a tubular shape by spirally winding a long member as shown in FIG. 7, and the joint 23a and the long member are respectively formed with spiral protrusions. Parts 23b and 23c are formed, and are formed of an opaque material.

This hose 21 first has an inner hose 23
The winding direction of the inner rib 19b of the body side hose connection portion 17
The inner hose 23 in the same direction as the inclination of the inner rib 19b.
Screwed into. At this time, the hose 21 of the inner pipe 19
Is protruded from the outer pipe 18 so that the inner hose 23 can be temporarily inserted into the protruding portion so as to be hooked. Therefore, mounting of the inner hose 23 is facilitated.

Next, as in the case of the inner hose 19, the winding direction of the outer hose 22 is set to the same direction as the inclination of the outer rib 18b of the hose connecting portion 17 on the main body side, and the outer hose 22 is screwed into the outer rib 18b. The mounting of the hose 21 on the main body side hose connection part 17 is completed.

At this time, the inside of the inner hose 23 is communicated with the intake passage A2 of the main body side hose connection portion 17 to form the intake passage A3, while the space between the outer hose 22 and the inner hose 23 is connected to the main body side hose connection portion. It is communicated with the seventeen exhaust passages B2, and becomes an exhaust passage B3.

Further, since the winding direction of the inner hose 23 and the winding direction of the outer hose 22 are the same, the directions in which the inner hose 23 and the outer hose 22 are easily bent or twisted are the same. . Therefore, when the hose 21 is twisted or bent while the cleaner body 1 is used, the outer hose 22 and the inner hose 23 are twisted or bent following each other.
The inner hose 23 does not become resistant to each torsion or bending, and the flexibility of the hose 21 is ensured.

Numeral 24 is a grip portion to which the hose 21 is connected to one end and a connecting pipe 32 to be described later is mounted to the other end, and the handle 21 to which the connecting pipe 32 is mounted is connected to the hose 21 to one end. The other end is the handle 35
And a hose connection portion 27 mounted on the hose.

The hose connecting portion 27 has a double structure including a cylindrical outer pipe 28 and an inner pipe 29 integrally formed with the outer pipe 28 by a supporting rib 29a. Cover 3 to cover the side
1 is provided.

On the outer circumference of the outer pipe 28 and the inner pipe 29, outer ribs 18b of the main body side hose connection portion 17 are provided.
An outer rib 28a and an inner rib 29a having the same inclination as the inner rib 19b are formed, so that the outer hose 22 and the inner hose 23 of the hose 21 can be twisted and mounted in the same direction. This facilitates the assembling work.

At this time, the outer pipe 28 and the inner pipe 29
Communicates with the exhaust passage B3 of the hose 21 to form an exhaust passage B4. The inside of the inner pipe 29 communicates with an intake passage A3 in the hose 21 to form an intake passage A4.

The handle portion 35 is composed of a U-shaped tubular portion 25 and a handle 26 extending above the tubular portion 25. The handle portion 35 has a mounting opening 25a in which the connecting pipe 32 is mounted. The clamp 2 is located above the mounting opening 25a.
5b is provided. A cylindrical portion 30 is formed inside the cylindrical portion 30 and communicates with the mounting port 25a, into which the end of the inner pipe 29 is inserted.
And an intake passage A5 communicating with the intake passage A4 of
An exhaust passage B4 formed by an inner pipe 29 and an outer pipe 28 between the outside of the cylindrical portion 30 and the outer periphery of the grip portion 24.
And an exhaust passage B5.

Reference numeral 32 denotes a connecting pipe which is locked by the clamp 25b and is mounted on the mounting opening 25a of the grip portion 24.
It is formed by connecting the pipes 32a. The connecting pipe 32 has an outer cylindrical portion 32b having a substantially circular cross section.
And an inner cylindrical portion 32c eccentric to the outer cylindrical portion 32b and having an upper portion integrally formed with the outer cylindrical portion 32b. The inner cylindrical portion 32c and the outer cylindrical portion 32b form a crescent. A space is formed. When the connecting pipe 32 is attached to the grip portion 24, the inner tubular portion 32
c communicates with the intake passage A5 of the grip portion 24 to form an intake passage A6 therein, and between the outer tubular portion 32b and the inner tubular portion 32c communicates with the exhaust passage B5 of the grip portion 24. To form the exhaust passage B6.

The exhaust gas passing through the exhaust passage B6 is clean air from which dust has been removed through the dust collecting bag 10 and the fine dust filter 12 of the cleaner body 1, so that the exhaust gas passes through the inner cylindrical portion 32c. Focusing on the fact that it is not necessary to form a substantially circular cross section in consideration of dust clogging, in this embodiment, as described above, the exhaust passage B6 has a substantially crescent cross section, and the outer cylindrical portion 32b has a substantially circular cross section. It is formed as follows.

Reference numeral 33 denotes a suction tool connected to the connecting pipe 32, and joint pipes 33a, 33b to which the connecting pipe 32 is connected.
Are formed in a concentric double structure, and the connecting pipe 32
Has a shape similar to that of the connecting pipe 32.

When the electric vacuum cleaner constructed as described above is used, the air blown by the electric blower 14 causes the air mixed with the dust sucked from the suction tool 33 to flow through the intake passage A5 of the connecting pipe 32 and the hose. 21 and is taken into the cleaner body 1 through the suction passage A3. In the cleaner body 1, dust is removed by the dust collecting bag 10, and the purified air is sucked by the electric blower 14 through the fine dust filter 12 to cool the electric blower 14.

A part of the exhaust air from the electric blower 14 is exhausted to the outside through the exhaust hole 6 of the cleaner main body 1, and the other part passes from the exhaust passage B 1 of the cleaner main body 1 to the exhaust passage B 3 of the hose 21. . At this time, the protrusion 22b of the outer hose 22
Since the direction of 22 c and the direction of the protrusion 23 of the inner hose 23 are formed in the same direction, the outer hose 2
The ventilation resistance to the air flowing between the inner hose 2 and the inner hose 23 is reduced, and the loss of the hose 21 in the exhaust passage B3 can be suppressed.

After passing through the exhaust passage B3 of the hose 21, the air flows back to the suction tool 33 through the exhaust passage B6 of the connecting pipe 32, and is returned to the connecting pipe together with the dust soared by the exhaust air. It will circulate to 32 intake channels A6.

By recirculating a part of the exhaust air as described above, the exhaust air blown to the outside is reduced and weakened, so that dust in the room being cleaned can be effectively prevented from rising.

In the above-described embodiment, the hose connection portion is attached to the connection pipe via the handle portion. However, the hose connection portion is formed in a letter-like shape, and the connection pipe is directly connected to the hose connection portion. May be attached.

FIGS. 9 to 17 show a second embodiment, which will be described with reference to these drawings. In the second embodiment, the outer pipe 18 and the inner pipe 19 of the main body side hose connection part 17 are separated, and the outer pipe 28 and the inner pipe 29 of the hose connection part 27 are separated.
Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

Reference numeral 51 denotes a hose connecting portion on the main body side which is connected to the hose 21 and mounted on the cleaner body 1, and comprises a cylindrical outer pipe 52 and an inner pipe 53 as shown in FIG.

As shown in FIG. 10, a hose connection port 5 is provided at one end of the outer pipe 52 to be attached to the cleaner body 1.
Is formed on the other end, and an outer rib 52b similar to that of the first embodiment is formed on the other end side. Reference numeral 54 denotes a holding plate for holding the locking claw 52a from above.

The inner pipe 53 is formed separately from the outer pipe 52, and a plurality of support ribs 53a are formed on one end of the inner pipe 53 which is mounted on the cleaner body 1. The support rib 53a is formed so as to contact the inner periphery of the outer pipe 52, and supports the inner pipe 53 in the outer pipe 52.

A female screw portion 53c is formed substantially at the center of the inner pipe 53, and a mounting screw 55 for fixing the holding plate 54 protrudes from the inner circumference of the outer pipe 52. The inner pipe 53 is fixed to the outer pipe 52 by being screwed into the screw portion 53c.

On the other hand, at the other end of the inner pipe 53, an inner rib 53b inclined in the same direction as the outer rib 52b is formed as in the first embodiment.
The inner hose 23 is screwed into the portion 3b.

When assembling the main-body-side hose connecting portion 17 having the above-described configuration, the winding direction of the hose 21 is set to the same direction as the inner rib 53b and the outer rib 52b, and the inner hose 23 of the hose 21 is pulled out from the outer hose 22. And the inner hose 23
Is screwed into the inner rib 53b and mounted, and then the outer hose 22 is screwed into the outer rib 52b and mounted. Finally,
The inner pipe 53 is fixed in the outer pipe 52 by the mounting screw 55 for fixing the holding plate 54, and the process is completed.

At this time, the inner pipe 53 and the outer pipe 5
2, the inner hose 23 can be pulled out from the outer hose 22 and attached to the inner pipe 53.
Installation work becomes easy.

Next, a description will be given of a hose connecting portion 65 to which the hose 21 is connected at one end and which is mounted on a grip portion 24 described later.

Numeral 65 is a hose connecting portion to which the hose 21 is connected at one end and which is attached to a grip portion 61 which will be described later, and has a double structure comprising a cylindrical outer pipe 63 and a cylindrical inner pipe 64. ing. 66 is a cover provided so as to cover the side of the hose connection portion 65 to which the hose 21 is connected.

As shown in FIG. 15, an outer rib 63a into which the outer hose 22 is screwed is provided at one end of the outer pipe 63 as in the first embodiment.
Are formed in the same direction as the outer rib 52b. On the other hand, a protrusion 63b is formed on the inner periphery on the other end side at a position recessed by a predetermined distance from the end.

The inner pipe 64 is formed separately from the outer pipe 63 as shown in FIG. An inner rib 64a into which the outer hose 22 is screwed at one end side is formed in the same direction as the inner rib 53b of the main body side hose connection portion 51 as in the first embodiment, while a pipe shaft is provided on the outer periphery. The support rib 64b is formed in the direction. The support rib 64b is formed so as to be in contact with the inner periphery of the outer pipe 63, and rotatably supports the inner pipe 64 in the outer pipe 63. Further, by making contact with the protrusion 63b on the other end of the outer pipe 63, one end of the inner pipe 64 is flush with one end of the outer pipe 63 to which the hose 21 is connected. The other end protrudes from the other end of the outer pipe 63.

The hose connecting portion 65 is assembled by the hose 2
1 is wound in the same direction as the inner rib 64b and the outer rib 63b, and the inner hose 23 of the hose 21 is connected to the outer hose 2
Pull out from 2. Then, the inner rib 6 is attached to the inner hose 23.
After the 4b is screwed and mounted, the outer rib 63b is screwed into the outer hose 22 and mounted. Next, the inner pipe 64
The support rib 64b of the inner pipe 64 and the outer pipe 63 are bonded after the inner pipe 64 is disposed at a predetermined position in the outer pipe 63 by bringing the support rib 64b into contact with the protrusion 63b of the outer pipe 63. Complete.

At this time, the inner pipe 64 and the outer pipe 63
Are rotatable with each other, the inner pipe 64 can be twisted without twisting the outer pipe 63 and the outer pipe 63 can be twisted without twisting the inner pipe 64. The amount of screwing of the hose 21 into the hose can be adjusted without twisting between the outer hose 22 and the inner hose 23. Therefore, even if the length of the hose 21 varies, it can be easily adjusted by adjusting the screw allowance.

Further, as described above, the inner pipe 64 is separated from the outer pipe 63, the inner hose 23 is pulled out from the outer hose, and the inner hose 23 is screwed into the inner rib 64a and mounted, whereby the hose 21 is connected. The inner pipe 64 can be easily mounted without protruding the inner pipe 64 from the outer pipe 63. Thereby, the side of the hose connecting portion 65 to which the hose 21 is connected can be shortened, and the hose connecting portion 65 can be made compact. Further, the cover 66 that covers the side to which the hose 21 is connected can be shortened, so that the cover 6
6 can be reduced.

In the second embodiment, the inner pipe 64 of the hose connection portion 65 is arranged at a predetermined position in the outer pipe 63. However, the inner pipe 64 can be moved in the pipe axis direction. Good. In this case, since the position at which the inner pipe 64 is fixed to the outer pipe 63 can be adjusted, variations in the length of the hose 21 and variations in the screwing allowance when the hose 21 is screwed in can be absorbed. Therefore, assemblability can be improved.

Further, in the second embodiment, the main body side hose connecting portion 51 fixes the inner pipe 53 to the outer pipe 52 with the mounting screw 55. However, the inner pipe 53 is not screwed and the inner pipe 53 is connected to the outer pipe 52. May be rotatably supported. Thereby, the main body side hose connection part 5
1, the outer hose 2
Even if a twist occurs between the inner hose 2 and the inner hose 23, the twist can be eliminated and the outer pipe 52 and the inner pipe 53 can be integrated, and the usability can be improved without impairing the followability and flexibility of the hose 21 during use. Can be better.

Further, in the second embodiment, the inner pipe and the outer pipe of the hose connection portion mounted on the handle portion are separated from each other, but the inner pipe is formed integrally with the handle portion, and the outer pipe is formed. May be separate from the inner pipe.
Further, the handle portion may be eliminated so that the connecting pipe is directly attached to the hose connecting portion, and the inner pipe of the hose connecting portion may be integrally formed with the connecting pipe, and the outer pipe may be formed separately from the inner pipe.

[0059]

According to the first aspect of the present invention, the inner hose and the outer hose have the same direction in which the inner hose and the outer hose are easily bent or twisted, and the hose is twisted or bent during use of the cleaner body. When the outer hose and the inner hose are twisted or bent following each other, the outer hose and the inner hose maintain the flexibility of the hose without resistance to each other's torsion and bending. it can. Also, since the direction of the protrusion of the outer hose and the direction of the protrusion of the inner hose are formed in the same direction, the ventilation resistance to air flowing between the outer hose and the inner hose due to the protrusion is reduced, and Loss in the exhaust passage can be suppressed.

According to the second aspect of the present invention, the heat of the air in the exhaust passage heated through the electric blower can be radiated to the outside of the hose through the outer hose and the intake passage through the inner hose. Since the heat can be dissipated inside, the heat in the exhaust passage can be efficiently dissipated.

According to the third aspect of the present invention, the inner hose and the outer hose can be twisted and attached in the same direction to the hose connecting portion attached to the cleaner body, so that the assembling workability can be improved. it can.

According to the fourth aspect of the present invention, the inner hose and the outer hose can be twisted and attached in the same direction to the hose connection portion to which the pipe is attached, so that the assembling workability can be improved.

According to the fifth aspect of the present invention, since the outer pipe is mounted on the outer pipe and the inner pipe is mounted on the inner pipe, the inner pipe and the outer pipe can be assembled. Mounting becomes easy, and mounting workability can be improved.

According to the sixth aspect of the present invention, since the inner pipe and the outer pipe are rotatable relative to each other, the inner pipe is not twisted without twisting the outer pipe, or the outer pipe is twisted without twisting the inner pipe. Since it is possible to twist, the screwing allowance of the outer pipe and the inner pipe can be easily adjusted without twisting between the outer hose and the inner hose.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view of the entire configuration showing an electric vacuum cleaner according to the present invention, in which a part of a hose is omitted.

FIG. 2 is an enlarged sectional view of a main body of the electric vacuum cleaner.

FIG. 3 is an enlarged cross-sectional view showing a state where a hose is connected to a hose connection part on a main body side of the electric vacuum cleaner.

FIG. 4 is a cross-sectional view of FIG.
It is sectional drawing.

FIG. 5 is a side view, partially broken away, of a hose of the electric vacuum cleaner.

FIG. 6 is a partially cutaway side view of the outer hose in FIG. 5;

FIG. 7 is a partially cutaway side view of the inner hose in FIG. 5;

FIG. 8 is a sectional view of a grip portion of the electric vacuum cleaner.

FIG. 9 is a cross-sectional view showing a state where a hose is connected to a hose connection part in the second embodiment of the electric vacuum cleaner.

FIG. 10 is a sectional view showing a state where an outer hose is connected to the outer pipe in FIG. 9;

11 is a cross-sectional view in a state where an inner hose is connected to the inner pipe in FIG. 9;

FIG. 12 is a sectional view of a hose grip portion of the electric vacuum cleaner.

FIG. 13 is a cross-sectional view in a state where a hose is connected to the hose connection portion in FIG.

FIG. 14 is a sectional view taken along line YY in FIG.

FIG. 15 is a sectional view showing a state where an outer hose is connected to the outer pipe in FIG. 13;

FIG. 16 is a sectional view showing a state where an inner hose is connected to the inner pipe in FIG. 13;

FIG. 17 is an explanatory view showing that the inner pipe and the outer pipe are rotatable with respect to each other.

[Explanation of symbols]

 1 Vacuum cleaner body 14 Electric blower 17, 51 Body side hose connection part 18, 52 Outer pipe 18b, 52a Body side hose connection part Outer rib 19, 53 Inner pipe 19b of body side hose connection part 19, 53a Inner rib of main body side hose connection 21 Hose 22 Inner hose 23 Outer hose 27, 65 Hose connection 28, 63 Outer pipe of hose connection 28b, 63a Outer rib of hose connection 29, 64 Inner pipe of hose connection 29b, 64a Inner rib of hose connection part 32 Connecting pipe 33 Suction tool A2 to A6 Intake channel B1 to B6 Exhaust channel

Continuation of the front page (72) Inventor Rizo Kobayashi 2-5-5-Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Toshiyuki Fujiyoshi 2-5-5-1 Keihanhondori, Moriguchi-shi, Osaka No. Sanyo Electric Co., Ltd. (72) Yoshihiro Mori 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Takahiro Nishiyama 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F term (reference) 3B057 BA07 BA09 BA22 BA23 BA25 BA26

Claims (6)

[Claims] 1. A vacuum cleaner comprising: a hose, a connection pipe, and a suction tool connected to a cleaner body having a built-in electric blower, and an intake flow passage and an exhaust flow passage for recirculating exhaust gas from the electric blower. Along with forming the hose with an outer hose and an inner hose to form an exhaust passage and an intake passage,
A flexible hose formed by winding a long member around the outer hose and the inner hose to form a tube, wherein the winding direction of the inner hose and the winding direction of the outer hose are the same. Vacuum cleaner to do. 2. The vacuum cleaner according to claim 1, wherein an intake passage is formed by the inner hose, and an exhaust passage is formed between the outer hose and the inner hose. 3. A hose connection portion having a double structure comprising an outer pipe and an inner pipe is provided at a connection portion between the cleaner body and the hose, and the hose is engaged with an outer circumference of the outer pipe and an outer circumference of the inner pipe. The vacuum cleaner according to claim 1 or 2, wherein the engaging portions to be provided are each provided to be inclined with respect to the pipe axis direction, and the inclinations of the engaging portions are made to be the same direction. 4. A hose connecting portion having a double structure comprising an outer pipe and an inner pipe is provided at a connecting portion between the pipe and the hose, and the hose is engaged with the outer circumference of the outer pipe and the outer circumference of the inner pipe. The vacuum cleaner according to claim 1 or 2, wherein the engaging portions are provided to be inclined with respect to the pipe axis direction, and the inclined portions are inclined in the same direction. 5. The vacuum cleaner according to claim 3, wherein the outer pipe and the inner pipe of the hose connection part are formed separately. 6. The vacuum cleaner according to claim 5, wherein the inner pipe is rotatably supported on the outer pipe.