JP3408236B2 - Vacuum cleaner and suction device for 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 an exhaust gas recirculation type electric circuit in which a recirculation path for recirculating exhaust gas of an electric blower provided in a cleaner body is connected to a recirculation path formed in a hose or a pipe. Regarding the vacuum cleaner.

[0002]

2. Description of the Related Art A circulation path is formed to circulate exhaust gas from an electric blower to a floor suction tool having a rotatable rotary brush, and blows the exhaust gas toward a surface to be cleaned in the floor suction tool, Japanese Patent Application No. 11-163986 proposes an electric vacuum cleaner in which a rotary brush is rotated by exhaust air so that dust on a surface to be cleaned is floated and sucked.

However, when cleaning a carpet with a long hair, the rotating torque of the rotating brush due to the exhausted gas is insufficient for the rotation torque, so that the dust that has entered the back of the hair such as the carpet is sufficiently removed. In some cases it could not be removed.

In order to solve this problem, it is conceivable that the floor suction tool is provided with an electric motor forcibly rotating the rotary brush, but it is necessary to provide a place for wiring a power supply line to the electric motor, so that the intake passage and the exhaust gas are exhausted. If a floor suction device having a double structure with a flow passage is provided with a wiring place for a power supply line, the floor suction device becomes large and difficult to use.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above drawbacks, and an object thereof is to provide an electric vacuum cleaner capable of simplifying the structure of the floor suction tool and improving the dust removal performance. And

[0006]

The electric vacuum cleaner of the present invention comprises:
A cleaner body having a built-in electric blower and a hose connection portion, an exhaust passage provided in the cleaner body for returning exhaust gas of the electric blower to the hose connection portion, and a flexibility connected to the cleaner body. A hose, an extension pipe connected to the flexible hose, a floor suction tool connected to the extension pipe, the flexible hose, the extension pipe, and the floor suction tool, and the cleaner body. An exhaust passage communicating with the exhaust passage of, the floor suction tool has a suction tool body and a connection pipe detachably connected to the extension pipe, and the suction tool body has a rotating brush. An electric motor for driving a rotating brush is provided, and a cover body is attached to an outer surface of the connection pipe in the connection pipe to form an exhaust passage between the outer surface of the connection pipe and the cover body, and the outer surface of the connection pipe and the cover body. Between the extension pie Electrically connected to securing the terminal to disposed a feeding terminal to, characterized in that arranged feed line for connecting the said motor to the exhaust path terminal.

It is preferable that the power supply line in the exhaust passage is provided with a slack that allows the connecting pipe to rotate with respect to the main body of the suction tool.

A floor suction device for an electric vacuum cleaner according to the present invention comprises a suction tool body having a rotary brush and a rotary brush driving electric motor, and a connecting pipe rotatably supported in the left-right direction with respect to the suction tool body. The connection pipe, a cover body is attached to the outer surface of the connection pipe to form an exhaust passage between the outer surface of the connection pipe and the cover body, and between the outer surface of the connection pipe and the cover body. A terminal electrically connected to a power supply terminal provided in the extension pipe is fixed, and a power supply line that connects the electric motor and the terminal is provided in the exhaust path.

It is preferable that the power supply line in the exhaust passage is provided with a slack that allows the connecting pipe to rotate with respect to the main body of the suction tool.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 is a cleaner main body, a main body case 2, a cover 16 (described later) attached to the outer bottom of the main body case 2 to form an exhaust passage 17 between the main body case 2 and the main body case. 2 a front cover 18 (described later) attached to the front part, and a state in which the front wall of the main body case 2 has an intake port 3 and the front side of the main body case 2 communicates with the intake port 3 The dust collection chamber 5 containing the paper pack 4, the electric blower chamber 7 containing the electric blower 6, and the cord reel chamber 9 containing the cord reel 8
Are equipped sequentially.

The electric blower 6 is covered with a motor cover 10. The motor cover 10 has a first opening 11 at a position corresponding to the blower of the electric blower 6 and corresponds to the electric blower 6. The second opening 12 is formed at the position. 13 is a filter disposed in the second opening 12,
After a part of the exhaust gas of the electric blower 6 passes through the electric motor,
It is designed to be discharged from the shaft portion of a wheel 14 arranged on the side of the main body case 2 through the filter 13.

Reference numeral 15 denotes a first opening of a motor cover 10 for covering the electric blower 6 on the bottom surface of the electric blower chamber 7 of the main body case 2.
A part of exhaust gas from the electric blower 6 is guided to an exhaust passage 17 described later via the return port 15 at a return port formed corresponding to 11.

Reference numeral 16 is a cover attached to the outer bottom surface of the main body case 2, and an exhaust passage 17 through which the exhaust air of the electric blower 6 passes is formed between the cover 16 and the bottom surface of the main body case 2.

Reference numeral 18 denotes a front cover which is attached to the front portion of the main body case 2 and forms an exhaust space 19 between the main body case 2 and the hose connection into which a first connecting member 27 of a hose 24 described later is inserted. The tubular portion 20 is formed, and the opening of the hose connecting tubular portion 20 is adapted to coincide with the intake port 3 of the main body case 2. Reference numeral 21 is a communication port that is formed in a part of the hose connection tubular portion 20 and connects the exhaust space 19 and the inside of the hose connection tubular portion 20.

Reference numeral 22 is a partition wall formed in the lower part of the front wall of the main body case 2 toward the front, and includes the exhaust passage 17 and the exhaust space.
19 and a communication hole 23 formed in the partition wall 22
The exhaust passage 17 and the exhaust space 19 are thereby communicated with each other.

In FIGS. 1 and 2, reference numeral 24 denotes a hose whose one end side is detachably connected to the cleaner body 1, and which has a flexible small-diameter inner hose 25 and a larger diameter than the inner hose 25. The outer hose 26 and the outer hose 26 have a double structure. The inner hose 25 has an intake passage, the inner hose 25 and the outer hose 26 have an exhaust passage, and the outer hose 26 has conductivity and shape retention. The coil wire which it has is installed.

In the above hose 24, the inner hose 25 has no coil wire or the like built in, so that the user may accidentally use the hose 24
Even when stepping on, since the deformation of the inner hose 25 is restored, the inner hose 25 is not deformed unless the outer hose 26 is deformed, and therefore dust is not clogged in the inner hose 25. Further, if the outer hose 26 is deformed, it can be recognized that the inner hose 25 is also crushed, and the inconvenience of clogging with dust without noticing the abnormality of the inner hose 25 is prevented.

In the present embodiment, the hose 24 is made of a colored resin for the inner hose 25 and a translucent resin for the outer hose 26.

In FIG. 1, 27 is a first connecting member arranged at one end of the hose 24, an inner member 28 to which the inner hose 25 is connected and an outer member 29 to which the outer hose 26 is connected. The inner hose 25 is made of
After being attached to the outer member 28, the outer hose 26 is attached and fixed to the outer member 29.

In the first connecting member 27, the inner member 28 is an outer member.
The first connecting member is formed so as to project more than 29
When 27 is connected to the hose connection tube portion 20 formed on the front cover 18 of the cleaner body 1, the inner member 28 is air-tightly connected to the intake port 3 of the body case 2 and the hose connection tube portion 20. The communication port 21 formed on the inner surface of the exhaust member 19 faces the inner member 28 protruding from the outer member 29.
Exhaust air from the inner member of the first connecting member 27 through the communication port 21
It is designed to flow between the outer member 28 and the outer member 29.

In FIG. 2, reference numeral 30 denotes a second connecting member arranged at the other end of the hose 24, and like the first connecting member 27, an inner member 31 to which the inner hose 25 is connected, It is composed of an outer member 32 to which the outer hose 26 is connected.

Reference numeral 33 is a handle tube integrally formed with a grip portion 34 on the upper surface thereof, and a second connecting member 30 to which the hose 24 is connected is rotatably and electrically connected to the handle tube 33.
The handle tube 33 is an inner tubular portion 35 having a substantially circular cross section and serving as an intake passage that matches the inner member 31 of the second connecting member 30, and a lower side of the inner tubular portion 35 (opposite the grip portion 34). The outer cylindrical portion 36 is formed so as to cover the side) and communicates with the outer member 32 of the second connecting member 30 and serves as an exhaust passage.

Reference numeral 37 denotes a clamp that is swingably incorporated in the handle tube 33, and a pressing portion 38 formed at one end is exposed on the upper surface of the handle tube 33, and a hook 39 formed at the other end is provided inside. The inner tubular portion 35 is adapted to be retractable and retractable through an opening (not shown) formed in the tubular portion 35.

In FIGS. 2, 18 and 19, 40, 41
Are the first and second detachably attached to the handle tube 33.
An extension pipe, as shown in FIG.
Corresponding to the shape of, the intake cylinder portions 42 and 43 having a substantially circular cross-section, which respectively correspond to the inner cylinder portion 35, and the lower portions of the intake cylinder portions 42 and 43, which correspond to the outer cylinder portion 36, are covered. The exhaust pipes 44 and 45 each having a substantially crescent-shaped cross section are formed as described above.

At the other end of the first extension pipe 40 (the connection side of the second extension pipe 41), as shown in FIG. 18, a cover integrally attached to the outer surface of the intake cylinder portion 42 side.
A clamp 46, which is similar to the clamp 37 of the handle tube 33, is disposed between the cover 40a and 40a, exposing a pressing portion 47 formed at one end on the upper surface of the cover 40a and a hook 48 formed at the other end. Through the opening 49 formed in the intake cylinder portion 42 of the first extension pipe 40 so as to be able to freely retract into and out of the intake cylinder portion 42.

At one end of each of the first and second extension pipes 40 and 41 (on the side where the handle pipe 33 is connected), an insertion tube portion 50 is inserted into the other end of the handle pipe 33 and the first extension pipe 41, respectively. , 51 are formed, and a seal packing 52 is arranged on the outer periphery of the insertion cylinders 50, 51 of the intake cylinders 42, 43. Reference numeral 53 is an engaging recess formed on the upper surface of the insertion tubular portions 50 and 51 on the intake tubular portions 42 and 43 side, and the hook 48 of the clamp 46 is engaged with the engaging recessed portion.

Here, the connection portion between the first extension pipe 40 and the second extension pipe 41 has been described in detail with reference to FIG. 18, but the connection pipe between the second extension pipe 41 and the floor suction tool 54 described later.
The same applies to the connection portion with 79, and the description and detailed drawings are omitted.

3 to 19, reference numeral 54 denotes a floor suction tool detachably connected to the other end of the second extension pipe 41. The floor suction tool includes upper case 55, lower case 56, and upper and lower cases 55, 56. Suction tool body composed of a lid body 68 (described later) that engages and disengages freely
57 and the suction tool body 57 that is sandwiched between the upper and lower cases 55, 56.
The rotary tube 75 is provided so as to be vertically movable with respect to the rotary tube 75 (described later), and the connection tube 79 (described later) is provided on the rotary tube 75 so as to be rotatable in the circumferential direction.

6 to 8, reference numeral 58 designates the suction tool body.
A suction port formed on the bottom surface of 57, 59 is a rotary brush storage chamber formed in the suction device main body 57, and stores the rotary brush 60 rotatably while facing the suction port 58.

The rotating brush 60 includes a core body 61 and the core body.
Consists of a pair of brush bodies 62 that are mounted by inserting the base portion into the spiral groove formed in 61, and a pair of blades 63 that are also mounted by inserting the base portion into the spiral groove of the core body 61. Has been done. The blade 63 is formed in a curved shape from nylon, polyethylene resin, or the like.

In FIG. 6, 100 is an electric motor storage chamber formed in the suction body 57 adjacent to the rotating brush storage chamber 59, 101 is an electric motor disposed in the motor storage chamber 100,
A belt 102 transmits the rotation of the electric motor 101 to the rotating brush 60, and when the electric motor 101 is driven, the rotating brush 60 is rotated counterclockwise as shown in FIG. Further, the rotating brush 60 is configured to be rotatable counterclockwise when viewed from the direction of FIG. 8 by a one-way clutch (not shown).

103 is an electric motor storage chamber 1 in the suction tool body 57.
A safety switch 104 that detects that the bottom surface of the suction tool body 57 faces upward in the control unit storage chamber provided at a position facing 00, and a safety switch that the bottom surface of the suction tool body 57 faces upward. A control board 105 for controlling the electric motor 101 such as stopping the electric motor 101 when the electric current is detected by 104 is provided.

In FIGS. 7 and 8, 64 is the lower case.
At the front of the suction port 58 of 56, a guide portion formed in a substantially horizontal direction,
Reference numeral 65 denotes a guide member that is continuously arranged on a lower member 70 of a lid body 68 described later, and has a space between the front wall of the lower case 56 and the guide portion 64. It is arranged so as to guide the exhaust gas from the passage 72 described later toward the guide portion 64.

The lower end of the guide member 65, which serves as a discharge opening of the return passage (a passage 72 described later), faces the guide portion 64.
It is located close to the surface to be cleaned, and the exhaust air from the return path (passage 72) is discharged from a position close to the surface to be cleaned, so that dust on the surface to be cleaned can be easily trapped and cleaning efficiency can be improved. There is.

Exhaust gas that has collided with the guide portion 64 has its direction changed and is guided to the rotary brush 60 side. The blade 63 of the rotary brush 60 is being cleaned while cleaning a carpet or the like.
Also, the brush body 62 is prevented from being caught on the carpet and reducing the rotational force.

In FIG. 6, 66 is the upper and lower cases 55, 56.
Is a pivotal support formed in the rear center of the
The hollow shaft 78 is rotatably supported. 67
Is an exhaust space continuously formed in the shaft support portion 66, and exhaust gas of the electric blower 6 is guided through a hollow shaft 78 of a turning pipe 75 described later.

In FIGS. 3, 4, 7 and 8, 68 is a lid which is detachably attached to the upper and lower cases 55 and 56 and constitutes the top surface of the rotary brush storage chamber 59.
And a lower member 70. 71 is the upper member 69
In the vicinity of both ends in the longitudinal direction of the rotary brush 60, that is, at positions corresponding to both ends of the rotary brush 60, a pair of bulges formed to project upward over the entire width of the upper member 69 in the lateral direction. A passage 72 through which the exhaust gas from the exhaust space 67 passes is formed between the lower member 70 and the lower member 70, and a front opening of the passage 72 serves as an exhaust gas outlet.

In FIG. 7, the passages 72, 72 of the lower member 70 are shown.
A large number of small holes 73 are formed in the portion corresponding to the space,
The noise due to the air flow in the rotary brush storage chamber 59 is reduced.

In FIGS. 9 to 14, reference numeral 75 denotes a rotary tube which is vertically movable with respect to the suction tool main body 57, and is connected to the suction tool main body 57 from one end side to which a connection tube 79 described later is connected. While forming a continuous intake pipe portion 76 on the other end side being sandwiched,
An exhaust passage 77 is formed on the outer peripheral portion of the intake pipe portion 76 at one end of the rotating pipe 75 so as to coincide with an exhaust passage 81 of a connecting pipe 79 described later.

In FIGS. 9 to 11, reference numeral 78 designates the rotating tube 75.
A hollow shaft formed on the other end side of the hollow passage communicating with the exhaust passage 77, and the shaft 78 is rotatably supported by the shaft supporting portions 66, 66 of the upper and lower cases 55, 56. The exhaust flow path 77 of the rotating tube 75 and the exhaust space 67 of the suction tool body 57 communicate with each other.

In FIGS. 9 to 17, reference numeral 79 designates the rotating tube 75.
A connecting pipe rotatably connected in a circumferential direction to the rotating pipe.
An intake passage 80 communicating with the intake pipe portion 75 of 75, and an exhaust pipe portion of the second extension pipe 41 integrally formed on the outer peripheral portion of the intake passage 80.
The exhaust passage 81 communicates with the exhaust passage 45, and a cover member 82 forming a part of the exhaust passage 81.

On the side of the second extension pipe 41, the exhaust passage 81 of the connection pipe 79 has a crescent-shaped cross section that matches the exhaust cylinder portion 45 of the second extension pipe 41.
At the connection side of the turning pipe 75 of 79, it is formed over the entire outer circumference of the intake pipe portion 76.

On the second extension pipe 41 side of the connecting pipe 79,
An insertion cylinder portion 84 is formed similarly to the first extension pipe 40 side end portion of the second extension pipe 41 and the handle pipe 33 connection side end portion of the first extension pipe 40, and the insertion cylinder portion 84 is formed in the insertion cylinder portion 84. An engaging recess 85 with which the hook 48 of the clamp 46 is engaged is formed.

In FIGS. 9, 10 and 12, 106 is a terminal provided on the upper surface of the connecting pipe 75 on the side of the second extension pipe 41, 107 is a power supply line having one end connected to the terminal 106, and 108.
Is a connector that is connected to the other end of the power supply line 107 and is mounted on the control board 105. The power supply line 107 is connected to the exhaust passage 7
7, the hollow shaft 78 and the exhaust space 67 are arranged and connected to the control board 105. In addition, the power supply line 107 is wired with a slack larger than the distance over which the rotating tube 75 and the connecting tube 79 rotate in order to prevent disconnection due to the rotating of the rotating tube 75 and the connecting tube 79. There is.

By connecting the connection pipe 75 to the second extension pipe 41, the terminal 106 is electrically connected to a power feeding means (not shown) arranged in the second extension pipe 41. 109 is a power supply line for fixing the terminal 106.
It is a cover body that covers 107.

In FIGS. 10 to 14, reference numeral 86 designates the rotating tube.
A support cover attached to one end side of 75, which is composed of upper and lower support members 87 and 88, and which holds a flange portion 89 formed at the opening edge of the exhaust passage 81 of the connection pipe 79 between the one end side of the rotating pipe 75. Then, the turning tube 75 and the connecting tube 79 are rotatably supported.

The turning tube 75 can be turned to a position substantially vertical to the suction tool main body 57, and the connecting tube 79 is arranged in the left-right direction with respect to the turning tube 75.
It can be rotated to a position substantially horizontal to the floor surface. By rotating the rotating pipe 75 vertically, and by rotating the connecting pipe 79 in either the left or right direction to a substantially horizontal position. The first and second extension pipes 40 and 41 are substantially parallel to the suction tool main body 57, and the suction tool main body 57 can be inserted into a gap of furniture or the like for cleaning.

Thus, in the present embodiment, when the electric blower 6 is driven, the air sucked from the suction port 58 and the guide port 74 of the floor suction device 54 contains the dust in the rotating tube.
Intake pipe portion 75 of 75, intake passage 80 of connecting pipe 79, intake pipe portions 42 and 43 of the first and second extension pipes 40 and 41, and inner pipe portion of the handle pipe 33.
35, inner member 31 of second connecting member 30, inner hose 25, first
It flows into the dust collecting chamber 5 via the inner member 28 of the connecting member 27.

Then, the dust contained in the intake air is removed from the paper pack 4
After being filtered at, most of the intake air is exhausted from the blower portion of the electric blower 6 through the first opening 11 of the motor cover 10 and the return port 15 on the bottom surface of the electric blower storage chamber as an exhaust passage.
A part of the intake air is discharged from the shaft portion of the wheel 14 through the second opening 12 of the motor cover 10 and the filter 13 from the electric motor portion of the electric blower 6 while being recirculated to 17.

Most of the exhaust gas recirculated to the exhaust passage 17 is
A communication hole 23 formed in the partition wall 22 of the main body case 2, an exhaust space 19 between the main body case 2 and the front cover 18, and a communication port 21 formed in the hose connection tubular portion 20 of the front cover 18.
Through the inner connecting member 28 and the outer connecting member 29 of the first connecting member 27.

The inner hose 25 and the outer hose connected to the inner member 28 and the outer member 29 of the first connecting member 27, respectively.
After passing through the exhaust passage formed between the second connecting member 30 and the inner member 31 and the outer member 32 of the second connecting member 30, it flows into the outer tubular portion 36 of the handle pipe 33, and 1, 2nd extension pipe 4
Connecting pipe 7 of floor suction device 54 through exhaust pipes 44, 45 of 0, 41
It flows into the exhaust passage 81 of 9.

The exhaust gas flowing into the exhaust passage 81 of the connecting pipe 79 is sucked from the exhaust passage 77 of the rotating pipe 75 through the hollow shaft 78 to the suction device main body 57.
After passing through the exhaust space 67, it collides with the guide portion 64 through the passage 72 formed in the bulging portion 71 of the lid 68, and blows against the rotating brush 60 to rotate the rotating brush 60.

Further, the lower member 70 of the lid 68 which constitutes the passage 72
Since the guide member 65 is continuously arranged close to the guide portion 64, the exhaust gas from the passage 72 is discharged from the rotary brush storage chamber 59.
It is prevented from diffusing inside and is guided to the rotating brush 60 more reliably, so that the rotating force of the rotating brush 60 can be efficiently obtained.

When cleaning a carpet or the like having a long bristle, the rotational torque of the rotary brush 60 due to the exhaust gas recirculated to the main body 57 of the suction tool is insufficient for the rotating torque, and the carpet or the like is pushed deep into the fur. In some cases, the dust cannot be removed sufficiently, so the electric motor 101 is driven to forcibly rotate the rotating brush 60. At this time, the exhaust gas that has collided with the guide portion 64 is configured to be guided in the rotating direction of the rotating brush 60 by changing its direction. The load of the electric motor 101 is assisted by the rotation of the rotating brush 60. Can be reduced and the electric motor 101 can be downsized.

Further, since the power supply line 107 to the control board 105 is wired in the exhaust passage 77, the hollow shaft 78 and the exhaust space 67, the wiring can be processed without using any special parts. In addition to simplifying the configuration, the power supply line 107 is disposed in the exhaust flow path 77, the hollow shaft 78, and the exhaust space 67 through which the air that has passed through the paper pack 4 and is relatively clean is flowed. It is possible to prevent a problem such that the coating is damaged and short-circuited due to the collision of 107 with dust or the like, and a problem such as dust is entangled with the power supply line 107 and the passage is blocked or the like is caused.

The handle pipe 33 and the first extension pipe 40, the first extension pipe 40 and the second extension pipe 41, and the connection portion between the second extension pipe 41 and the connection pipe 79 of the floor suction tool 54 are respectively arranged. Since all the clamps 46 are provided on the intake passage side from the floor suction tool 54 to the cleaner body 1, air does not flow out to the atmosphere side through the hole facing the pressing portion of the clamp 46. ,
The user does not feel uncomfortable.

That is, for example, the first extension pipe 40 and the second extension pipe 40
Explaining the connection portion with the extension pipe 41 as an example, if the pressing portion 47 of the clamp 46 is disposed on the exhaust tube portion 44 side, the exhaust tube portion is exposed through the opening 49 that faces the hook 48 of the clamp 46. Exhaust gas flowing inside 44 leaks to the outside of the first extension pipe 40,
Although the user may feel discomfort, the clamp 46 is moved from the floor suction tool 54 to the cleaner body 1 as in the present embodiment.
By arranging it on the side of the intake cylinder portion 42 which is the side of the intake passage, the intake flow in the intake cylinder portion 42 that is sucked by the electric blower 6 flows through the opening 49 that exposes the hook 48 of the clamp 46. Outside air flows in a direction to be drawn into the intake cylinder portion 42, air leakage from the first extension pipe 40 can be prevented, and the user does not feel uncomfortable.

Further, while the electric motor 101 is being driven, the suction tool body 57
When the bottom surface faces upward, the safety switch 104 detects this state and the control unit stops the electric motor 101.
The danger of touching 0 and injuring is eliminated.

Since the passage 72 of the lid 68 is formed at a position corresponding to both ends of the rotating brush 60, the exhaust gas flowing back to the passage 72 is mainly guided to both ends of the rotating brush 60 via the guide portion 64. To be sprayed.

The suction force of the vacuum cleaner is strongest in the central portion of the suction port 58, corresponding to the suction pipe portion 76 of the rotary pipe 75 connected to the rear central portion of the suction tool main body 57, but in the present embodiment, Since exhaust air is blown to both ends of the rotary brush 60 as described above, it is possible to reliably scrape up dust on both ends of the rotary brush 60, which has a weaker suction force than the central portion of the suction port 58.

Further, since the discharge port of the passage 72 is formed in front of the floor suction tool 54 (that is, in front of the rotary brush storage chamber 59), the exhaust gas flowing from the rear side of the floor suction tool 54 to the front side is discharged. It is possible to smoothly guide the rotary brush storage chamber 59 from the front side to the lower side and to the rear side, thus preventing a decrease in wind speed and improving the deep suction force.

A guide member 65 is provided at the discharge port of the passage 72, and since the discharge opening of the exhaust gas from the passage 72 is close to the surface to be cleaned, the exhaust gas from the passage 72 is rectified and guided.
It is a rotating brush that sprays onto 64 to prevent the wind speed from decreasing.
The rotation torque of 60 can be obtained, and the suction performance can be improved by entrapping the dust on the surface to be cleaned.

[0064]

According to the structure of the present invention, the power supply line to the electric motor for rotating the rotary brush is arranged in the exhaust passage communicating with the exhaust passage of the cleaner main body of the floor suction tool. The structure of the suction tool can be simplified. Further, since the power supply line is laid in the exhaust path through which relatively clean air flows, dust and the like do not collide with the power supply line and the coating is not damaged, and a short circuit of the power supply line can be prevented. Also, dust or the like will not be entangled with the power supply line and the flow path will not be blocked.

Since the power supply line has a slack larger than the turning distance of the turning pipe and the connecting pipe, disconnection of the power feeding line due to turning of the turning pipe and the connecting pipe can be prevented. And so on.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cleaner body and a flexible hose of an electric vacuum cleaner according to the present invention.

FIG. 2 is a sectional view of the flexible hose from a handle tube to a floor suction tool.

FIG. 3 is a top view of the same floor suction tool.

FIG. 4 is a side view of the same.

FIG. 5 is a front view of the same.

FIG. 6 is a top view of the same floor suction tool with the upper case and lid removed.

FIG. 7 is a cross-sectional view of the same floor suction tool.

8 is a cross-sectional view taken along the line AA in FIG.

FIG. 9 is a front view of the rotating tube and the connecting tube.

FIG. 10 is a side view of the same.

FIG. 11 is a view showing a rear surface of the rotary tube and a connecting tube connected to each other and a back surface of the rotary tube at the same time.

FIG. 12 is a cross-sectional view of the rotary tube and the connecting tube.

13 is a cross-sectional view taken along the line BB in FIG.

FIG. 14 is a cross-sectional view taken along the line CC in FIG.

FIG. 15 is a sectional view taken along the line D-D in FIG. 12, with the turning tube removed.

FIG. 16 is a top view of the connecting pipe.

FIG. 17 is a bottom view of the connecting pipe.

FIG. 18 is a cross-sectional view of a connecting portion of the first extension pipe and the second extension pipe.

19 is a cross-sectional view taken along the line EE in FIG.

[Explanation of symbols]

1 Vacuum cleaner body 24 hose 25 inner hose 26 Outer hose 40 First extension pipe 41 Second extension pipe 42 Intake cylinder 43 Intake cylinder 44 Exhaust tube (return path) 45 Exhaust tube (return path) 54 Floor suction device 60 rotating brush 64 Information 65 Guide member 67 Exhaust space (recirculation path) 72 passages (return passage) 74 Information Gate 75 rotating tube 76 Intake pipe 77 Exhaust flow path (recirculation path) 78 Hollow shaft (return path) 79 Connection tube 80 air intake 81 Exhaust path (recirculation path) 101 electric motor 107 feeder

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-11-187999 (JP, A) JP-A-1-268527 (JP, A) JP-A-9-135795 (JP, A) JP-A-9- 75282 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 9/28 A47L 5/14 A47L 9/24 A47L 9/08

Claims (4)

(57) [Claims] 1. A built-in electric blower and a hose connection
A cleaner body having a portion, and the cleaner body provided on the cleaner body.
Exhaust passage for returning the exhaust air of the electric blower to the hose connection part
And a flexible hose connected to the cleaner body,
An extension pipe connected to the flexible hose and the extension pipe
Floor suction tool to be connected, the flexible hose, extension pie
Of the vacuum cleaner and the floor suction device,
An exhaust passage communicating with the passage, and the floor suction device is attached to the suction device body and the extension pipe.
And a suction pipe that is detachably connected
An electric motor that drives the rotating brush and the rotating brush on the tool body.
And a cover is attached to the outer surface of the connecting pipe.
And form an exhaust passage between the outer surface of the connecting pipe and the cover body.
Along with the outer surface of the connecting pipe and the cover body, the extension
A terminal that is electrically connected to a power supply terminal arranged on a pipe
And connect the electric motor and the terminal to the exhaust passage.
An electric vacuum cleaner characterized in that a power supply line is installed. 2. The electric vacuum cleaner according to claim 1, wherein the power supply line in the exhaust passage is provided with a slack that allows the connecting pipe to rotate with respect to the suction tool body. 3. A suction tool body having a rotating brush and an electric motor for driving the rotating brush, and a left-right direction with respect to the suction tool body.
And a connection pipe rotatably supported on the connection pipe.
Attach the cover to the outer surface of the connecting pipe, and
-The exhaust pipe is formed between the body and the outer surface of the connecting pipe.
Between the cover and the cover, the power supply arranged in the extension pipe
Fix the terminal electrically connected to the terminal and connect it to the exhaust path.
A suction tool for an electric vacuum cleaner , comprising a power supply line connecting the electric motor and the terminal . 4. The suction tool for an electric vacuum cleaner according to claim 3, wherein a slack that allows the connecting pipe to rotate with respect to the suction tool body is provided on the power supply line in the exhaust passage .