JP3478471B2 - 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 an electric vacuum cleaner provided with a rotating brush body in a nozzle portion for promoting separation of dust from a surface to be cleaned.

[0002]

2. Description of the Related Art An electric vacuum cleaner equipped with a rotating brush body at a nozzle portion for sucking dust together with air and rubbed the surface to be cleaned with the rotating brush body to promote separation of dust from the surface to be cleaned. Has been known for a long time. Further, Japanese Patent Laid-Open No. 7-136082 proposes an electric vacuum cleaner that promotes separation of dust from the surface to be cleaned by spraying a back flow of an electric blower for generating a suction air flow onto the surface to be cleaned. There is. The structure of the electric vacuum cleaner disclosed in this publication is shown in FIGS.

FIG. 11 is a sectional view of the entire vacuum cleaner as seen from the side, and FIG. 12 is a sectional view of the nozzle portion as seen from above. In this electric vacuum cleaner, the nozzle portion 71 is attached to the cleaner main body 72.
It is configured as an upright type provided at the bottom of the. In these figures, 73 is an electric blower, and a dust collecting bag 74 is attached to its rear part. The electric blower 73 and the dust collecting bag 74 are housed in a main body cover 75 of the cleaner main body 72, and the main body cover 75 is provided with a lid 76 for inserting and removing the dust collecting bag 74. The cleaner main body 72 is provided with a handle 77 for movement, and the main body cover 75 is formed with an exhaust port 84 for discharging the wake of the electric blower 73 to the outside of the cleaner main body 72.

A suction port 78 for sucking dust is provided on the lower surface of the nozzle portion 71, and the suction port 78 and the dust collecting bag 74 are connected by a suction flow passage 79. An air outlet 80 is provided toward the surface to be cleaned 90 in the front of the inside of the nozzle portion 71 in the traveling direction, and the air outlet 80 and the cleaner body 72 are connected by a return passage 81.

When the electric blower 73 is operated, the suction flow 82
And a wake flow occur at the same time, and a part of the wake flow 83 is discharged to the outside of the cleaner main body 72 through the exhaust port 84. The other part 85 of the wake flows through the return passage 81 and is blown onto the surface to be cleaned from the outlet 80. As a result, the dust on the surface to be cleaned 90 is blown up, is further sucked from the suction port 78 by the suction flow, is guided to the dust collecting bag 74 through the suction passage 79, and is collected there. The air sequentially passes from the suction port 78 provided in the nozzle portion 71 to the dust collecting bag 74, the air outlet 80 provided at the end of the return path 81, and the surface 90 to be cleaned, and reaches the suction port 78 again. Therefore, a circulation path for constantly circulating the suction airflow is formed.

FIG. 13 is a sectional view of a nozzle portion 86 having another structure as seen from the side. The nozzle portion 86 is provided with the same air outlet 87 as the air outlet 80, and a suction brush 88 behind the air outlet 87 is provided with a rotating brush body 89. The rotating brush body 89 is rotated by a driving force supplied from a motor via a belt and rubs the surface 90 to be cleaned. When the surface to be cleaned 90 is such as a carpet that is easily entangled with dust, the air blown from the air outlet 87 may not be able to separate the dust, but the rotary brush body 89 can scrape the dust to separate it.

[0007]

However, in the structure of the above publication, the air outlet and the suction port provided at the end of the return path are separated by a wall and are separate, and the rotary brush body provided in the suction port. There is a problem that dust such as thread waste and hair is entangled in the rotating brush because it is not directly recirculated to the brush. In addition, since the air from the air outlet easily goes out of the nozzle through the gap between the nozzle and the surface to be cleaned, dust blown up from the surface to be cleaned spreads around the nozzle and the suction capability is reduced. There was an occasion.

The present invention has been made in view of the above-mentioned problems, and provides an electric vacuum cleaner in which dust is unlikely to be entangled in a rotating brush body, dust is unlikely to be scattered, and a high suction ability can be stably maintained. The purpose is to

[0009]

In order to achieve the above object, according to the present invention, a cleaner body having an electric blower and a dust collection chamber, a nozzle portion having an opening on the lower surface, the inside of the nozzle portion and dust collection. A suction passage that connects the chambers and a rotating brush body that is provided inside the nozzle portion and that has a brush on the outer peripheral surface and that rotates around a horizontal axis are provided through the suction passage by the air flow generated by the electric blower. Dust is sucked together with air from the opening of the nozzle part, and the sucked dust is captured by the dust bag housed in the dust collection chamber, and the surface to be cleaned facing the opening of the nozzle part by the brush of the rotating brush body. In an electric vacuum cleaner that promotes the separation of dust from the surface to be cleaned by rubbing the rotating brush body, the rotating brush body is formed into a hollow cylindrical shape having a through hole reaching the outer peripheral surface, and one end of the rotating brush body is Is closed
And an opening is formed at the other end.
A reflux path for guiding the wake of the electric blower to the inside of the rotating brush body is connected to the mouth so that the wake of the electric blower is blown to the surface to be cleaned facing the opening of the nozzle through the through hole. .

In this electric vacuum cleaner, the air in the nozzle portion reaches the dust collecting chamber through the suction passage, and after the dust is removed by the dust collecting bag, the air inside the nozzle portion passes through the return passage and the hollow rotating brush body in the nozzle portion is removed. It reaches the inside, is sprayed from the through hole to the surface to be cleaned, and returns to the inside of the nozzle portion. That is, air circulates between the nozzle portion and the cleaner body. The air blown from the through-hole to the surface to be cleaned flows toward the outside of the rotating brush body, which prevents dust from adhering to the brush provided on the outer peripheral surface of the rotating brush body, and removes the attached dust from the brush. Blow away. A suction force is generated by the electric blower inside the nozzle portion, and the air blown from the through hole toward the surface to be cleaned is sucked into the suction passage again. Therefore, the circulating air does not come out of the nozzle portion, and dust does not spread around the nozzle portion.

A detachable filter for catching fine dust may be provided in the return path. Even if there is dust that leaks from the dust bag, it is captured by the filter before the wake of the electric blower reaches the rotating brush body, so the dust does not enter the rotating brush body and the cleaning is completed. It is possible to prevent dust from reattaching to the surface of the cleaning body. Since the filter is removable, it is easy to remove the trapped dust.

It is preferable that a portion of the return path from the cleaner body to the nozzle portion is constituted by a flexible hose, and the end portion of the hose can be attached to and detached from the nozzle portion. The hose with the end removed from the nozzle can be used as a blower.

It is preferable that the inside of the nozzle portion is partitioned by the nozzle case forming the nozzle portion to form a portion of the return path inside the nozzle portion. The nozzle has a simple structure and is lightweight.

In order to achieve the above object, the present invention also provides a cleaner body having an electric blower and a dust collecting chamber, a nozzle portion having an opening on the lower surface, and a suction port connecting the inside of the nozzle portion and the dust collecting chamber. And a rotating brush body provided inside the nozzle portion and having a brush on the outer peripheral surface and rotating about a horizontal axis, and the opening of the nozzle portion through the suction passage by the air flow generated by the electric blower. Inhale dust with air from
The suctioned dust is captured in the dust bag stored in the dust collection chamber, and the brush of the rotating brush rubs against the surface to be cleaned that faces the opening of the nozzle to promote separation of the dust from the surface to be cleaned. In the vacuum cleaner, the rotating brush body is formed into a hollow cylindrical shape having a through hole reaching from the inside to the outer peripheral surface, and an opening is formed at one end of the rotating brush body.
On this opening side, a rotor blade fan that sucks air outside the nozzle portion into the inside of the rotating brush body is provided integrally with the rotating brush body, and the air sucked by the rotor blade fan has a through hole. It is to be sprayed onto the surface to be cleaned facing the opening of the nozzle section through.

In this electric vacuum cleaner, the air outside the nozzle is sucked into the hollow rotary brush body by the moving blade fan and is blown onto the surface to be cleaned from the through hole. This air flowing toward the outside of the rotating brush body prevents dust from adhering to the brush. Since the suction force generated by the electric blower is generated inside the nozzle portion, the air blown from the through hole toward the surface to be cleaned is sucked in without going out of the nozzle portion.

In any of the electric vacuum cleaners having the above constructions, the nozzle portion can be provided in the lower portion of the cleaner main body to be an upright type. In addition, the through hole is a brush of the rotating brush body.
Can be sandwiched between.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The appearance of the vacuum cleaner of the first embodiment is shown in FIGS. 1 and 2. FIG. 1 is a perspective view of the electric vacuum cleaner as seen obliquely from the front, and FIG. 2 is a rear view showing a part of the inside in a transparent manner. This electric vacuum cleaner is composed of a cleaner main body 1 and a nozzle portion 3 provided in the lower portion thereof, and is configured as an upright type. A handle body 2 for movement is provided on the top of the cleaner body 1.

A blower chamber 12 is provided at the bottom of the cleaner body 1, and an electric blower 13 for generating an air flow is provided in the blower chamber 12. A dust collecting chamber 14 is provided above the blower chamber 12, and the dust collecting bag 15 is provided in the dust collecting chamber 14.
Is housed. The front part of the cleaner body 1 is the body cover 1
The main body cover 11b is openable and closable for attaching and detaching the dust collecting bag 15. The dust collection chamber 14 is closed by closing the main body cover 11b. The front side (suction flow) side of the blower chamber 12 communicates with the dust collection chamber 14.

An electric blower 13 is provided on the left front part of the cleaner body 1.
A slit-shaped exhaust hole 11c for discharging a part of the rear flow (exhaust flow) to the outside is formed, and a carrying hand 11d is provided on the back surface. Reference numeral 16 is a power switch, and 17 is a power cord. A rear wheel 18 for traveling is provided at a rear portion of the lower end of the cleaner body 1.

The nozzle part 3 has a rotating brush body 5 inside and is covered with a nozzle case 31 and a bottom cover 32. The bottom cover 32 is screwed to the nozzle case 31. The nozzle portion 3 and the cleaner body 1 are connected by a suction side hose 6 and an exhaust side hose 7. The suction side hose 6 connects the inside of the nozzle part 3 to the dust collection chamber 14, and the exhaust side hose 7 connects the downstream side of the blower chamber 12 to the inside of the nozzle part 3 via the rotating brush body 5. is doing.

FIG. 3 shows a cross section of the vacuum cleaner as seen from the side, and FIG. 4 shows the nozzle portion 3 as seen from below with the bottom cover 32 removed. Bosses 11a are formed on the left and right of the cleaner body 1. The nozzle portion 3 is attached to these bosses 11a, and can rotate back and forth around the boss 11a as a fulcrum.

The rotary brush body 5 is horizontally arranged in the center of the nozzle 3 on the left and right sides. A pulley 52 is attached to one end of the rotary brush body 5, and the shaft 13 a of the electric blower 13 and the pulley 52 are connected by a belt 33. The rotation of the electric blower 13 is transmitted to the pulley 52 by the belt 33, which causes the rotating brush body 5 to rotate. In the portion of the bottom cover 32 facing the rotating brush body 5, a long suction port 32a is formed on the left and right,
The rotary brush body 5 faces the outside through the suction port 32a.

A partition wall 31a is provided on the rear side of the rotary brush body 5, and a suction port portion 31b is formed on the right side surface side. A suction side connection pipe 34 is disposed behind the suction port portion 31b, and the front end of the suction side connection pipe 34 is the suction port portion 3b.
1b, the rear end is connected to the suction side hose 6 described above.

An exhaust side connecting pipe 3 is provided on the left side of the nozzle portion 3.
5 is provided, and the end portion 7a of the exhaust side hose 7 is inserted into the rear end thereof. The exhaust side hose 7 has flexibility, and its end portion 7a is attachable to and detachable from the exhaust side connecting pipe 35. The outer peripheral surface of the end portion 7a is formed in a tapered shape for easy attachment and detachment. Further, a removable filter 7b is attached to the end portion 7a in order to capture the fine dust leaked from the dust collecting bag 15.

FIG. 5 shows a cross section of the rotary brush body 5 in an assembled state. The rotating brush body 5 is formed by spirally implanting brushes 512 on the outer peripheral surface of a hollow cylindrical rotating body 51. The rotating body 51 is formed with a large number of ventilation holes 511 penetrating from the inside to the outer peripheral surface. Brush shafts 53 projecting from both ends are arranged inside the rotating body 51 in the thrust direction. One end of the rotating body 51 is closed, and the above-mentioned pulley 52 is attached to the other end.

The pulley 52 is composed of an inner and outer double cylinder and a radial connecting portion connecting the inner cylinder and the outer cylinder. Outer cylinder is rotating body 5
The inner cylinder is fixed to the brush shaft 53 by an adhesive or the like on the end face of No. 1, whereby the rotating body 51, the pulley 52, and the brush shaft 53 are integrated. Further, the openings 521 are present between the radial connecting portions of the pulley 52.

Both ends of the brush shaft 53 are bearing holders 41,
It is supported by 42. The bearing holders 41 and 42 have recesses 41a and 42a in the center, respectively.
Bearings 43 are press-fitted into a and 42a. Press the end of the brush shaft 53 into the inner surface of the bearing 43,
By attaching the nut 54 to the end, the brush shaft 5
3 and the rotating body 51 are rotatably supported. The bearing holders 41 and 42 are fixedly held by being mounted on the ribs 31c and 31d provided on the nozzle case 31.

An opening 42b is formed in the bearing holder 42 on the pulley 52 side, and the end portion of the exhaust side connecting pipe 35 is fitted into the opening 42b without a gap. The wake side of the blower chamber 12 communicates with the inside of the rotating brush body 5 via the exhaust side hose 7, the exhaust side connecting pipe 35, the opening 42b of the bearing holder 42, and the opening 521 of the pulley 52.
Further, it communicates with the inside of the nozzle portion 3 via the air blow hole 511. As a result, a recirculation path of the wake of the electric blower 13 is formed.

FIG. 6 shows a cross section of the rotary brush body 5 taken along the line AA in FIG. The brushes 512 are provided in two rows facing each other with a twist of 360 °, and two rows of blower holes 511 are provided so as to sandwich the brush 512. Brush 51
2 has a suction port 3 at the tip without touching the bottom cover 32.
It is set so that it goes out a little from 2a. When the rotary brush body 5 rotates, the brush 512 rubs the surface to be cleaned toward the rear of the nozzle portion 3, thereby separating dust from the surface to be cleaned. It should be noted that the arrangement number and shape of the brush 512 and the ventilation hole 511 may be set arbitrarily.

The flow of air in the vacuum cleaner having the above structure will be described. When the power switch 16 is operated to supply electric power, the electric blower 13 rotates, and at the same time, the rotary brush body 5 also rotates. A suction force is generated by the rotation of the electric blower 13, air around the nozzle portion 3 enters the nozzle portion 3 through the suction port 32a, and the suction port portion 31b and the suction side connecting pipe 3
4, passing through the suction-side hose 6 in order to enter the dust collecting chamber 14, and further passing through the dust collecting bag 15 to reach the suction side of the blower chamber 12. Along with this front flow of the electric blower 13, dust on the surface to be cleaned below and around the nozzle portion 3 is sucked. The dust thus sucked is captured by the dust collecting bag 15 and accumulated inside.

The air that has entered the suction side of the blower chamber 12 is sent to the exhaust side and becomes a wake. Part of this wake is the exhaust hole 11
The gas is exhausted from the cleaner body 1 to the outside of the cleaner body 1, and the rest is the exhaust side hose 7, the exhaust side connecting pipe 35, and the opening 42 of the bearing holder 42.
b, it passes through the opening 521 of the pulley 52 in order and enters the inside of the rotary brush body 5, and is blown out into the inside of the nozzle portion 3 from the blower hole 511. The rotation of the rotating brush body 5 causes the air blow hole 511.
Faces downward at a constant cycle, and the blown air hits the surface to be cleaned and separates dust from the surface to be cleaned. Ventilation hole 511
The air blown from the
It is collected in the suction port portion 31b and circulates through the above-mentioned path.

The air blown outward from the air blow hole 511 prevents the dust from adhering to the brush 512 and blows the attached dust out of the brush 512. Further, this air does not come out of the nozzle portion 3, and therefore dust around the nozzle portion 3 is not blown up. Further, even when the surface to be cleaned is flexible like a carpet and the suction port 32a at the bottom of the nozzle portion 3 is blocked, the circulating air is always supplied into the nozzle portion 3, so the suction ability is reduced. do not do.

As described above, the end portion 7a of the exhaust side hose 7
Since the filter 7b is attached to the
The air blown out from No. 1 contains almost no fine dust. Therefore, there is no fear that dust will adhere to the surface to be cleaned after cleaning is completed. Since the filter 7b is removable, it is easy to remove the captured dust.

The filter 7b has threads and grooves formed on the outer peripheral surface and the inner peripheral surface of the end portion 7a of the exhaust side hose 7, and is screwed into the end portion 7a for attachment. The method of attaching the filter 7b is not limited to this, and another method may be adopted. Further, the filter 7b may be attached at any position, and if it is removable and is on the flow path until the wake of the electric blower 13 reaches the rotating brush body 5, the inside of the cleaner body 1 and the exhaust side hose 7
It may be either inside or inside the exhaust side connecting pipe 35.

When the detachable exhaust-side hose 7 is not connected to the exhaust-side connecting pipe 35, the wake of the electric blower 13 is concentratedly exhausted from the end 7a, which is used to blow away dust. It can be used as a blower. The upright type electric vacuum cleaner of the present embodiment is mainly used for cleaning a flat floor surface, but it can also be used for cleaning other than the floor surface by the blower function.

The second embodiment will be described. The vacuum cleaner of the present embodiment differs from the vacuum cleaner of the first embodiment in the partial configuration of the nozzle portion. The same parts are designated by the same reference numerals, and duplicate description will be omitted. FIG. 7 shows the nozzle part 3 viewed from below with the bottom cover 32 removed, FIG. 8 shows the appearance of the nozzle part 3, and FIG. 8 is a cross-sectional view of the assembled state of the rotary brush body 5 provided inside the nozzle part 3. 9 shows.

An end portion of the rotating body 51 forming the rotating brush body 5 opposite to the pulley 52 is open, and a moving blade fan 55 is integrally attached to the end portion. In the bearing holder 41 that supports the brush shaft 53 protruding from this end,
Similar to the bearing holder 42 that supports the other end, the opening 41b
Are formed. The method for attaching the end portion of the brush shaft 53 to the bearing holder 41 is as described above. An outside air intake hole 31e is formed in a portion of the nozzle case 31 facing the bearing holder 41, and the inside of the hollow rotating body 51 communicates with the outside of the nozzle portion 3 through the opening 41b and the outside air intake hole 31e.

The moving blade fan 55 is inclined with respect to the central boss portion 55a, the outer peripheral portion 55c, and the brush shaft 53, and the boss portion 5 is provided.
The fan 55b is provided so as to connect the outer peripheral portion 55b to the outer peripheral portion 55a. The boss portion 55a is fixed to the brush shaft 53, and the outer peripheral portion 55c is fixed to the end surface of the rotating body 51 by adhesion or the like, whereby the rotating body 51, the moving blade fan 55, and the brush shaft 53 are integrated. Rotating body 51
When the blade rotates, the moving blade fan 55 also rotates, and the air outside the nozzle portion 3 is sucked into the rotating body 51 without resistance by the fan 55b.

When the power switch 16 is operated to supply electric power, the electric blower 13 is rotated, and at the same time, the rotary brush body 5 is rotated.
And the blade fan 55 also rotates. The suction force is generated by the rotation of the electric blower 13, and the air around the nozzle portion 3 is sucked into the suction port 3
It enters into the nozzle part 3 from 2a and circulates through the path described in the first embodiment. Further, in the present embodiment, the air outside the nozzle portion 3 is directly taken into the inside of the rotating brush body 5 by the moving blade fan 55 and becomes a mixed flow with the air that has returned to the inside of the rotating brush body 5 via the return path, It is blown out from the air blowing hole 511 of the rotary brush body 5.

As the amount of dust accumulated in the dust collecting bag 15 increases, the amount of air sucked from the suction port 32a provided on the lower surface of the nozzle portion 3 decreases, but the moving blade fan 55.
As a result, the amount of air taken into the rotary brush body 5 increases. Therefore, regardless of the amount of dust in the dust bag 15, the dust is prevented from adhering to the brush 512, and the ability of sucking dust from the surface to be cleaned below the nozzle portion 3 is maintained high.

Even when the exhaust side hose 7 is removed from the exhaust side connecting pipe 35, air is sucked into the rotary brush body 5 by the moving blade fan 55, and the sucked air is blown from the blower hole 511 to the nozzle portion. It is blown out into the inside of No. 3 and greatly contributes to prevention of adhesion of dust to the brush 512 and maintenance of high suction ability. Therefore, in the configuration including the moving blade fan 55, it is possible to provide a configuration in which the return path from the exhaust side of the blower chamber 12 to the rotating brush body 5 is not provided.

The third embodiment will be described. The vacuum cleaner of the present embodiment is also different from the vacuum cleaner of the first embodiment in the partial configuration of the nozzle portion, and the same portions are denoted by the same reference numerals and redundant description will be omitted. FIG. 10 shows the nozzle portion 3 viewed from below with the bottom cover 32 removed. In the first embodiment, the exhaust side connection pipe 35 is arranged in the nozzle portion 3 and is used as a part of the return path from the exhaust side of the blower chamber 12 to the rotary brush body 5. However, in the present embodiment, The inside of the nozzle part 3 is partitioned by the nozzle case 31 to form an exhaust side connection chamber 35a, which is used as a part of the return path inside the nozzle part 3.

The nozzle case 31 is a resin molded product,
The partition wall 31f is formed during the molding. When the bottom cover 32 is attached, the lower end of the partition wall 31 comes into close contact with the upper surface of the bottom cover 32. The partition wall 31f communicates with the rib 31d that holds the bearing holder 42, and the exhaust side connection chamber 35a communicates with the inside of the rotating brush body 5. An opening for inserting the exhaust side hose 7 is formed at the rear end of the partition wall 31f, and the end 7a of the exhaust side hose is detachably attached.

With this structure, it is not necessary to prepare a member such as the exhaust side connecting pipe 35, and the assembly is easy,
The nozzle part 3 can be manufactured at low cost.

In each of the above embodiments, an example of an upright type electric vacuum cleaner is shown, but the present invention can also be applied to a separate type in which the nozzle portion is separated from the main body of the cleaner and both of them move independently. . In that case, a motor for driving the rotating brush body is provided in the nozzle part, and in addition to the cylinder and the hose as the suction path, the cylinder and the hose as the return path are provided between the nozzle part and the cleaner body. . However, since the return path does not pass dust, the diameter of the tube or hose may be small, and the vacuum cleaner does not become particularly large and the operability is not impaired. By constructing a part of the return path with the nozzle case as in the third embodiment, it is possible to minimize the weight increase of the nozzle portion.

[0046]

According to the electric vacuum cleaner of claim 1, it is possible to prevent dust from adhering to the rotating brush body, and
Dust will not spread around the nozzle. In addition, since the air is constantly supplied into the nozzle portion by circulating the air, a high suction capacity can be obtained, which can be stably maintained.

In the electric vacuum cleaner of the second aspect, even if there is dust leaking from the dust bag, it is possible to prevent the dust from reattaching to the surface of the body to be cleaned. Moreover, it is easy to remove dust from the filter.

In the electric vacuum cleaner according to the third aspect, even if the object to be cleaned cannot suck dust in the nozzle portion, the hose can be used as a blower to remove dust.

In the vacuum cleaner of the fourth aspect, the structure of the nozzle portion is simplified, and the manufacturing is facilitated. In addition, compared to the case where the return path in the nozzle part is formed using other parts,
The nozzle is lightweight and easy to handle. In particular, when the cleaner body and the nozzle portion are formed separately, the weight of the nozzle portion improves the operability.

Also when using the electric vacuum cleaner according to the fifth aspect, it is possible to prevent dust from adhering to the rotating brush body and also to prevent dust from scattering. Further, since the air is constantly supplied into the nozzle portion by sucking the outside air, the high suction ability is stably maintained.

The electric vacuum cleaner according to claim 6 is an upright type and is mainly used for cleaning the floor surface. However, since it is equipped with a rotating brush, it is suitable for cleaning the floor surface such as carpet where dust is easily entangled. . Such a floor surface tends to block the opening of the nozzle portion, but since air is constantly supplied into the nozzle portion by circulating air or sucking air from the outside, even if the opening is blocked Power does not decrease. Further, since dust is prevented from adhering to the brush, the necessity of cleaning the vacuum cleaner itself is greatly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric vacuum cleaner according to a first embodiment.

FIG. 2 is a rear view of the electric vacuum cleaner according to the first embodiment.

FIG. 3 is a side sectional view of the electric vacuum cleaner according to the first embodiment.

FIG. 4 is a bottom view of the vacuum cleaner according to the first embodiment with a bottom cover of a nozzle portion removed.

FIG. 5 is a cross-sectional view showing an assembled state of the rotary brush body provided in the nozzle unit of the first embodiment.

6 is a cross-sectional view of the rotary brush body taken along the line AA in FIG.

FIG. 7 is a bottom view of the vacuum cleaner according to the second embodiment with the bottom cover of the nozzle portion removed.

FIG. 8 is a perspective view of a nozzle portion according to a second embodiment.

FIG. 9 is a cross-sectional view showing an assembled state of a rotary brush body provided in a nozzle portion of a second embodiment.

FIG. 10 is a bottom view of the vacuum cleaner according to the third embodiment with the bottom cover of the nozzle portion removed.

FIG. 11 is a side sectional view of a conventional electric vacuum cleaner.

FIG. 12 is a plan sectional view of a nozzle portion of the conventional electric vacuum cleaner.

FIG. 13 is a side sectional view of a nozzle portion having another configuration of a conventional electric vacuum cleaner.

[Explanation of symbols]

1 Vacuum cleaner body 2 handle body 3 Nozzle part 5 rotating brush bodies 6 Suction side hose 7 Exhaust side hose 7b filter 11b Body cover 11c exhaust hole 12 Blower room 13 Electric blower 14 Dust collection chamber 15 dust bag 31 nozzle case 31a partition wall 31b Suction port 31e Outside air intake hole 31f partition wall 32 bottom cover 32a suction port 33 belt 34 Suction side connection pipe 35 Exhaust side connecting pipe 35a Exhaust side connection chamber 41 Bearing holder 41b opening 42 Bearing holder 42b opening 43 bearing 51 rotating body 52 pulley 53 brush shaft 55 moving blade fan 55b fan 511 ventilation hole 512 brush

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 9/02-9/08

Claims (7)

(57) [Claims] 1. A cleaner main body having an electric blower and a dust collecting chamber, a nozzle portion having an opening on a lower surface, a suction passage connecting the inside of the nozzle portion and the dust collecting chamber, and an inside of the nozzle portion. A rotating brush body that is provided and has a brush on the outer peripheral surface and that rotates around a horizontal axis, and sucks dust together with air from the opening of the nozzle section through the suction passage by the air flow generated by the electric blower. The dust sucked in is collected in a dust bag stored in the dust collection chamber, and the cleaning surface facing the opening of the nozzle portion is rubbed by the brush of the rotating brush body to remove the dust from the cleaning surface. in the electric vacuum cleaner to facilitate the separation, as well as a hollow cylindrical shape having a through hole reaching the outer peripheral surface of the rotating brush body from the inside, one of the rotating brush body
One end is closed and the other end has an opening.
A return path for guiding the wake of the electric blower to the inside of the rotating brush body is connected to the opening, and the wake of the electric blower faces the opening of the nozzle portion through the through hole. An electric vacuum cleaner characterized by being sprayed onto the cleaning surface. 2. The electric vacuum cleaner according to claim 1, wherein a detachable filter that captures fine dust is provided in the return path. 3. A portion of the return path from the cleaner body to the nozzle portion is formed of a flexible hose, and an end portion of the hose is attachable to and detachable from the nozzle portion. The electric vacuum cleaner according to claim 1. 4. The electric cleaning apparatus according to claim 1, wherein a portion of the return path inside the nozzle portion is formed by partitioning the inside of the nozzle portion with a nozzle case that constitutes the nozzle portion. Machine. 5. A cleaner main body having an electric blower and a dust collecting chamber, a nozzle portion having an opening on a lower surface, a suction path connecting the inside of the nozzle portion and the dust collecting chamber, and an inside of the nozzle portion. A rotating brush body that is provided and has a brush on the outer peripheral surface and that rotates around a horizontal axis, and sucks dust together with air from the opening of the nozzle section through the suction passage by the air flow generated by the electric blower. The dust collected from the surface to be cleaned is trapped in a dust collection bag housed in the dust collection chamber and rubbed against the surface to be cleaned facing the opening of the nozzle portion with the brush of the rotary brush body. in the electric vacuum cleaner to facilitate the separation, as well as a hollow cylindrical shape having a through hole reaching the outer peripheral surface of the rotating brush body from the inside, one of the rotating brush body
An opening is formed at the end, and a moving blade fan that sucks the air outside the nozzle portion into the inside of the rotating brush body is provided integrally with the rotating brush body at the opening side. An electric vacuum cleaner, wherein air sucked by a blade fan is blown onto a surface to be cleaned facing the opening of the nozzle portion through the through hole. 6. The electric vacuum cleaner according to claim 1, wherein the nozzle portion is provided in a lower portion of the cleaner body to be an upright type. 7. The through hole is a brush of the rotary brush body.
It is provided so as to sandwich the seal.
The vacuum cleaner according to any one of claims 1 to 6.