JPH11206648A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner which prevents dust from being caught in a rotary brush body for separating dust from a surface to be cleaned and prevents dust from scattering and moreover maintains high suction performances in a stable manner. SOLUTION: A rotary brush body 5 provided in a nozzle 3 of an upright type vacuum cleaner is formed from a hollow rotary body 51 which has a brush on its outer periphery and air holes 511 formed through the periphery of the body 51 from the inside thereof. A return passage interconnecting a dust collecting chamber of the body of the cleaner and one of the ends of the body 51 is formed to introduce a downside stream, of a motor-operated blower 13 for generating a suction air stream into the body 51 to blow the downside stream into the nozzle 3 from the holes 511. And a rotor vane fan is foxed to the other end of the body 51 to draw the air outside the nozzle 3, thereby blowing off the air drawn from the outside from the holes 511 into the nozzle 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner provided with a rotary brush at a nozzle for promoting separation of dust from a surface to be cleaned.

[0002]

2. Description of the Related Art A vacuum cleaner is provided with a rotary brush body at a nozzle portion for sucking dust together with air, and rubs the surface to be cleaned with the rotary brush body to promote separation of the dust from the surface to be cleaned. Is conventionally known. Further, an electric vacuum cleaner that promotes separation of dust from the surface to be cleaned by blowing a wake of an electric blower for generating a suction airflow onto the surface to be cleaned has been proposed in Japanese Patent Application Laid-Open No. Hei 7-136082. I have. The configuration of the vacuum cleaner disclosed in this publication is shown in FIGS.

FIG. 11 is a cross-sectional view of the entire vacuum cleaner viewed from the side, and FIG. 12 is a cross-sectional view of the nozzle portion viewed from above. In this vacuum cleaner, a nozzle portion 71 is attached to a cleaner body 72.
It is configured as an upright type provided below. In these figures, reference numeral 73 denotes an electric blower, and a dust collecting bag 74 is attached to a rear portion thereof. The electric blower 73 and the dust collecting bag 74 are accommodated 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 taking the dust collecting bag 74 in and out. The cleaner main body 72 is provided with a moving handle 77, and the main body cover 75 is formed with an exhaust port 84 for discharging the downstream of the electric blower 73 to the outside of the cleaner main body 72.

[0004] 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 bag 74 are connected by a suction channel 79. An outlet 80 is provided forward of the inside of the nozzle portion 71 in the traveling direction toward the surface 90 to be cleaned, and the outlet 80 and the cleaner body 72 are connected by a return path 81.

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

FIG. 13 is a cross-sectional view of a nozzle portion 86 having another configuration viewed from the side. The nozzle portion 86 is provided with an outlet 87 which is the same as the outlet 80, and a suction brush 88 at the rear thereof 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. If the surface 90 to be cleaned is such that dust such as a carpet is easily entangled, dust may not be separated by air blown out from the outlet 87, but can be lifted up and separated by the rotating brush body 89.

[0007]

However, in the configuration disclosed in the above publication, the outlet and the inlet provided at the end of the return path are separated by a wall and are separated from each other, and the rotary brush body provided in the inlet is provided. There is a problem that dust such as lint or hair gets entangled in the rotating brush body because the dust does not directly return to the rotating brush body. In addition, since air from the air outlet is likely to come out of the nozzle from 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 ability is reduced. There was something.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a vacuum cleaner in which dust is hardly entangled with the rotating brush body, dust is hardly scattered, and a high suction ability can be stably maintained. The purpose is to:

[0009]

According to the present invention, there is provided a vacuum cleaner having an electric blower and a dust collecting chamber, a nozzle having an opening on a lower surface, and an inside of the nozzle and a dust collector. A suction passage connecting the chambers, and a rotating brush body provided inside the nozzle portion and having a brush on the outer peripheral surface and rotating around a horizontal axis, and the air blower generated by the electric blower through the suction passage Dust is sucked together with air from the opening of the nozzle portion, captured by the dust collection bag stored in the dust collection chamber, and cleaned by rubbing the surface to be cleaned facing the opening with a rotating brush body brush. In a vacuum cleaner that promotes separation of dust from a surface, a rotary brush body is formed into a hollow cylindrical shape having a through hole extending from the inside to an outer peripheral surface, and a return flow for guiding a wake of an electric blower into the rotary brush body. Set up a road The slipstream of the electric blower through the through-hole so as blown onto the surface to be cleaned facing the opening.

In this vacuum cleaner, the air in the nozzle portion passes through the suction passage to the dust collection chamber, and after the dust is removed by the dust collection bag, passes through the return passage to form the hollow rotary brush body in the nozzle portion. It reaches inside, and 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. Since the air blown from the through-hole to the surface to be cleaned flows toward the outside of the rotating brush body, it 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 it away. A suction force by the electric blower is generated 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 go out of the nozzle portion, and dust does not spread around the nozzle portion.

It is preferable that a removable filter for catching fine dust is provided in the return path. Even if there is dust leaking from the dust collection bag, the wake of the electric blower is captured by the filter before reaching the rotating brush body, so that the dust does not enter the rotating brush body and the cleaning is completed. It is possible to prevent dust from re-adhering to the cleaning body surface. Since the filter is detachable, it is easy to remove the captured dust.

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

It is preferable that a portion inside the nozzle portion of the reflux path is formed by partitioning the inside of the nozzle portion with a nozzle case constituting the nozzle portion. The nozzle portion has a simple configuration and is lightweight.

To achieve the above object, the present invention also provides a cleaner body having an electric blower and a dust collecting chamber, a nozzle having an opening on a lower surface, and a suction connecting the inside of the nozzle to 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 around a horizontal axis, and from an opening of the nozzle portion through a suction passage by an airflow generated by an electric blower. Dust is sucked in together with air, and the sucked dust is captured in a dust collection bag accommodated in a dust collection chamber. The dust from the surface to be cleaned is rubbed by rubbing the surface to be cleaned facing the opening with a brush of a rotating brush body. A rotating blade body having a hollow cylindrical shape having a through hole extending from the inside to the outer peripheral surface, and sucking air outside the nozzle portion into the rotating brush body. Times Provided the brush body integral with the air sucked by the blades fan through the through-hole so as blown onto the surface to be cleaned facing the opening.

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

Each of the vacuum cleaners having the above-described structure can be of an upright type in which the nozzle portion is provided at a lower portion of the cleaner body.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the appearance of the vacuum cleaner according to the first embodiment. FIG. 1 is a perspective view of the vacuum cleaner as viewed obliquely from the front, and FIG. 2 is a rear view of the vacuum cleaner. This vacuum cleaner comprises a cleaner body 1 and a nozzle portion 3 provided at a lower portion thereof, and is configured as an upright type. A handle 2 for movement is provided on the upper part of the cleaner body 1.

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

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

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

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

The rotary brush body 5 is horizontally disposed at the center in the left and right direction in front of the inside of the nozzle portion 3. A pulley 52 is attached to one end of the rotating 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, whereby the rotating brush body 5 rotates. A long left and right suction port 32a is formed in a portion of the bottom cover 32 facing the rotating brush body 5,
The rotating brush body 5 faces the outside through the suction port 32a.

A partition wall 31a is provided behind the rotary brush body 5, and a suction port 31b is formed on the right side. A suction-side connection pipe 34 is provided behind the suction port 31b, and a front end of the suction-side connection pipe 34 is connected to the suction port 3.
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 3.
5 is provided, and the end 7a of the above-mentioned exhaust side hose 7 is inserted into its rear end. The exhaust side hose 7 has flexibility, and its end 7 a is detachable from the exhaust side connection pipe 35. The outer peripheral surface of the end 7a is formed in a tapered shape to facilitate attachment and detachment. In addition, a detachable filter 7b is attached to the end 7a in order to catch fine dust leaked from the dust bag 15.

FIG. 5 shows a cross section of the rotating brush body 5 in an assembled state. The rotary brush body 5 is formed by spirally implanting a brush 512 on the outer peripheral surface of a hollow cylindrical rotary body 51. The rotating body 51 has a large number of blow holes 511 penetrating from the inside to the outer peripheral surface. A brush shaft 53 projecting from both ends is disposed in the rotating body 51 in the thrust direction. One end of the rotating body 51 is closed, and the aforementioned pulley 52 is attached to the other end.

The pulley 52 comprises a double inner and outer cylinder, and a radial connecting portion for connecting the inner cylinder and the outer cylinder. The outer cylinder is a rotating body 5
The inner cylinder is fixed to the brush shaft 53 by bonding or the like at the end face of the rotating shaft 51, whereby the rotating body 51, the pulley 52 and the brush shaft 53 are integrated. Further, an opening 521 exists between the radial connecting portions of the pulley 52.

Both ends of the brush shaft 53 are bearing holders 41,
42 supported. The bearing holders 41 and 42 have concave portions 41a and 42a at the center, respectively.
The bearing 43 is press-fitted into the a and 42a. The end of the brush shaft 53 is pressed 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 mounted on ribs 31c and 31d provided on the nozzle case 31, and are fixed and held.

An opening 42b is formed in the bearing holder 42 on the pulley 52 side, and the end of the exhaust-side connecting pipe 35 is inserted into the opening 42b without any gap. The downstream side of the blower chamber 12 communicates with the inside of the rotary brush body 5 through the exhaust side hose 7, the exhaust side connection pipe 35, the opening 42b of the bearing holder 42, and the opening 521 of the pulley 52,
Furthermore, it communicates with the inside of the nozzle unit 3 through the air blowing hole 511. As a result, a return flow path downstream 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 pairs of air blowing 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 slightly exits from 2a. As the rotating 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. The number and shape of the arrangement of the brushes 512 and the ventilation holes 511 may be arbitrarily set.

The flow of air in the vacuum cleaner having the above configuration will be described. When power is supplied by operating the power switch 16, the electric blower 13 rotates, and at the same time, the rotating brush body 5 also rotates. The rotation of the electric blower 13 generates a suction force, and 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 connection pipe 3
4. The dust enters the dust collecting chamber 14 through the suction side hose 6 in order, and further passes through the dust collecting bag 15 to reach the suction side of the blower chamber 12. With this upstream flow of the electric blower 13, dust on the surface to be cleaned below and around the nozzle portion 3 is sucked. The sucked trash is captured by the dust collection bag 15 and accumulates therein.

The air that has entered the suction side of the blower room 12 is sent to the exhaust side to be downstream. Part of this wake is exhaust hole 11
c, the gas is exhausted to the outside of the cleaner body 1, and the remainder is the exhaust hose 7, the exhaust connection pipe 35, and the opening 42 of the bearing holder 42.
b, the air passes through the opening 521 of the pulley 52 in order, enters the inside of the rotary brush body 5, and blows out from the blow hole 511 to the inside of the nozzle portion 3. The rotation of the rotating brush body 5 causes the air blowing holes 511
Turns downward at regular intervals, and the blown air hits the surface to be cleaned and separates dust from the surface to be cleaned. Blow hole 511
Air blown out from the air blower 13 by the suction force of the electric blower 13
It is collected in the suction port 31b and circulates through the above-mentioned path.

The air blown outward from the blow holes 511 prevents dust from adhering to the brush 512 and acts to blow off the adhering dust from the brush 512. Further, this air does not go out of the nozzle portion 3 and therefore does not blow up dust around the nozzle portion 3. Further, even when the surface to be cleaned is flexible, such as a carpet, and blocks the suction port 32a at the bottom of the nozzle portion 3, the circulating air is always supplied into the nozzle portion 3, so that the suction capacity is reduced. do not do.

As described above, the end 7a of the exhaust side hose 7
Is equipped with a filter 7b, so that
The air blown out from 1 contains almost no fine dust. Therefore, there is no possibility that dust adheres to the cleaned surface again. Since the filter 7b is detachable, it is easy to remove the captured dust.

The filter 7b has a thread and a groove formed on its outer peripheral surface and the inner peripheral surface of the end 7a of the exhaust side hose 7, and is screwed into the end 7a for mounting. The method of attaching the filter 7b is not limited to this, and another method may be adopted. The position of the filter 7b is also optional. If the filter 7b is detachable and is on the flow path from the downstream side of the electric blower 13 to the rotating brush body 5, the exhaust side hose 7 inside the cleaner main body 1 is removed.
And any of the inside of the exhaust side connection pipe 35.

When the detachable exhaust side hose 7 is not connected to the exhaust side connection pipe 35, the wake of the electric blower 13 is exhausted from the end 7a in a concentrated manner, and this is used to blow off dust. Can be used as a blower. The upright type vacuum cleaner according to the present embodiment is mainly used for cleaning a flat floor surface, but can be used for cleaning other than the floor surface by a 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 a partial configuration of a nozzle portion. The same portions are denoted by the same reference numerals, and duplicate description will be omitted. FIG. 7 shows the nozzle portion 3 viewed from below with the bottom cover 32 removed, FIG. 8 shows the appearance of the nozzle portion 3, and a cross-sectional view of the rotating brush body 5 provided inside the nozzle portion 3 in an assembled state. It is shown in FIG.

The end of the rotating body 51 forming the rotating brush body 5 on the side opposite to the pulley 52 is open, and a moving blade fan 55 is integrally attached thereto. The bearing holder 41 that supports the brush shaft 53 protruding from this end includes:
Like the bearing holder 42 supporting the other end, the opening 41b
Are formed. The method of attaching the end 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 unit 3 via the opening 41b and the outside air intake hole 31e.

The rotor blade 55 is inclined with respect to the central boss 55a, the outer peripheral portion 55c, and the brush shaft 53, and the boss 5 is tilted.
It is composed of a fan 55b provided so as to connect the outer peripheral part 55b to the fan 5b. The boss portion 55a is fixed to the brush shaft 53, and the outer peripheral portion 55c is fixed to the end face of the rotating body 51 by bonding 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 rotor rotates, the rotor blade fan 55 also rotates, and the air outside the nozzle portion 3 is sucked into the rotor 51 without resistance by the fan 55b.

When power is supplied by operating the power switch 16, the electric blower 13 rotates, and at the same time, the rotating brush 5
The rotor blade 55 also rotates. The rotation of the electric blower 13 generates a suction force, and the air around the nozzle portion 3
The nozzle 2a enters the nozzle unit 3 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 rotating brush body 5 by the moving blade fan 55, and is mixed with the air that has returned to the rotating brush body 5 via the return path. The air is blown out from the blow hole 511 of the rotating brush body 5.

As the amount of dust accumulated in the dust bag 15 increases, the amount of air sucked from the suction port 32a provided on the lower surface of the nozzle portion 3 decreases.
As a result, the amount of air sucked into the rotating brush body 5 increases. Therefore, regardless of the amount of dust in the dust collection bag 15, the dust is prevented from adhering to the brush 512, and the ability to suck dust from the surface to be cleaned below the nozzle portion 3 is maintained at a high level.

Even when the exhaust side hose 7 is detached from the exhaust side connection pipe 35, air is sucked into the rotating brush body 5 by the moving blade fan 55, and the sucked air flows through the blow hole 511 to the nozzle portion. 3, which greatly contributes to preventing dust from adhering to the brush 512 and maintaining a high suction ability. Therefore, in the configuration including the moving blade fan 55, it is also possible to adopt a configuration in which a 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 also differs from the vacuum cleaner of the first embodiment in a 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 provided 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. Then, the inside of the nozzle portion 3 is partitioned by the nozzle case 31 to form an exhaust-side connection chamber 35a, which is a portion of the circulation path inside the nozzle portion 3.

The nozzle case 31 is a resin molded product.
A partition wall 31f is formed during the molding. When the bottom cover 32 is attached, the lower end of the partition wall 31 is in 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 rotary brush body 5. An opening for inserting the exhaust hose 7 is formed at the rear end of the partition wall 31f, and the end 7a of the exhaust hose is detachably attached.

In this configuration, there is no need to prepare a member such as the exhaust side connection pipe 35, and the assembly is facilitated.
The nozzle section 3 can be manufactured at low cost.

In each of the above embodiments, an example of an upright type vacuum cleaner has been described, but the present invention can also be applied to a separate type in which the nozzle portion is separated from the cleaner body and both move separately. . In that case, a motor for driving the rotating brush body is provided in the nozzle portion, and in addition to the tube and the hose as the suction passage, the tube and the hose as the return passage are provided between the nozzle portion and the cleaner body. . However, since the return path does not allow the passage of dust, the diameter of the cylinder or hose may be small, and the vacuum cleaner does not particularly become large and the operability is not impaired. If a part of the recirculation path is formed by the nozzle case as in the third embodiment, an increase in the weight of the nozzle portion can be minimized.

[0046]

According to the first aspect of the present invention, dust can be prevented from adhering to the rotating brush body.
Dirt does not spread around the nozzle. In addition, since the air is constantly supplied into the nozzle portion by circulating the air, a high suction capability is obtained, and the suction ability is stably maintained.

According to the second aspect of the present invention, even if there is dust leaking from the dust bag, the dust can be prevented from re-adhering to the surface of the body to be cleaned. In addition, dust can be easily removed from the filter.

According to the third aspect of the present invention, dust can be removed by using a hose as a blower, even for an object to be cleaned in which dust cannot be sucked by the nozzle portion.

In the vacuum cleaner according to the fourth aspect, the structure of the nozzle portion is simplified, and the manufacture is facilitated. Also, compared to the case where the recirculation path in the nozzle portion is formed using other parts,
The nozzle is lighter and easier to handle. In particular, when the cleaner body and the nozzle portion are configured separately, the operability is improved by reducing the weight of the nozzle portion.

According to the vacuum cleaner of the fifth aspect, it is possible to prevent dust from adhering to the rotating brush body and to prevent scattering of dust. Further, since the air is always supplied into the nozzle portion by sucking the outside air, the high suction ability is stably maintained.

The vacuum cleaner according to claim 6 is of an upright type and is mainly used for cleaning the floor surface. However, since the vacuum cleaner is provided with a rotating brush body, it is suitable for cleaning the floor surface where dust such as carpets is easily entangled. . Such a floor tends to close the opening of the nozzle, but air is always supplied into the nozzle by circulating air or sucking air from the outside. The power does not decrease. In addition, since dust is prevented from adhering to the brush, the necessity of cleaning the vacuum cleaner itself is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a 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 of the first embodiment with a bottom cover of a nozzle portion removed.

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

FIG. 6 is a sectional view of the rotary brush body taken along line AA of FIG. 4;

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

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

FIG. 9 is a cross-sectional view illustrating an assembled state of a rotary brush body provided in a nozzle unit according to a second embodiment.

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Handle body 3 Nozzle part 5 Rotary brush body 6 Suction side hose 7 Exhaust side hose 7b Filter 11b Main body cover 11c Exhaust hole 12 Blower room 13 Electric blower 14 Dust collection room 15 Dust collection bag 31 Nozzle case 31a Partition wall 31b Suction port 31e External air intake hole 31f Partition wall 32 Bottom cover 32a Suction port 33 Belt 34 Suction side connection pipe 35 Exhaust side connection 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 Blow hole 512 Brush

Claims (6)

[Claims] 1. A cleaner body having an electric blower and a dust collecting chamber, a nozzle having an opening on a lower surface, a suction path connecting the inside of the nozzle to the dust collecting chamber, and an inside of the nozzle. A rotating brush body having a brush on the outer peripheral surface and rotating about a horizontal axis, and sucking dust together with air from the opening of the nozzle portion through the suction passage by the airflow generated by the electric blower. The suctioned dust is captured in the dust collection bag accommodated in the dust collection chamber, and the separation of the dust from the surface to be cleaned is performed by rubbing the surface to be cleaned facing the opening with the brush of the rotating brush body. In the vacuum cleaner to be promoted, the rotating brush body is formed into a hollow cylindrical shape having a through-hole extending from the inside to the outer peripheral surface, and a return path for guiding a wake of the electric blower into the rotating brush body is provided. , Vacuum cleaner, characterized in the wake of the serial electric blower via the through-hole that was blown to the surface to be cleaned facing said opening. 2. The vacuum cleaner according to claim 1, wherein a removable filter for capturing fine dust is provided in the return path. 3. A part of the return path from the cleaner main body to the nozzle portion is constituted by a flexible hose, and an end of the hose is detachable from the nozzle portion. The vacuum cleaner according to claim 1, wherein 4. The electric cleaning device according to claim 1, wherein a portion inside the nozzle portion of the return path is formed by partitioning the inside of the nozzle portion with a nozzle case constituting the nozzle portion. Machine. 5. A cleaner main body having an electric blower and a dust collecting chamber, a nozzle having an opening on a lower surface, a suction path connecting the inside of the nozzle to the dust collecting chamber, and an inside of the nozzle. A rotating brush body having a brush on the outer peripheral surface and rotating about a horizontal axis, and sucking dust together with air from the opening of the nozzle portion through the suction passage by the airflow generated by the electric blower. The suctioned dust is captured in the dust collection bag accommodated in the dust collection chamber, and the separation of the dust from the surface to be cleaned is performed by rubbing the surface to be cleaned facing the opening with the brush of the rotating brush body. In the vacuum cleaner, the rotating brush body is formed into a hollow cylindrical shape having a through hole extending from the inside to the outer peripheral surface, and a blade blade for sucking air outside the nozzle portion into the rotating brush body. The integrally provided with the rotary brush member, vacuum cleaner, characterized in that the air sucked by the blades fan was blown to the surface to be cleaned facing said opening through said through-hole. 6. The vacuum cleaner according to claim 1, wherein the nozzle portion is provided at a lower portion of the main body of the cleaner to be an upright type.