JP2002272653A - Vacuum cleaner and its nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner having a small and lightweight nozzle with high dust-collecting power. SOLUTION: The rotation axis of a rotary brush 530 is approximately parallel to that of an air turbine and a nozzle 1 is disposed in the axial direction of a turbine 2. Airflow which drives the turbine 2 is approximately parallel to a rotary brush 530 and an air inlet 511 for taking in fresh air is provided upstream of the nozzle 1. A communicating hole 32 communicating a brush chamber 30 with a turbine chamber 10 is provided downstream of the turbine 2.

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 having a suction source as a driving source.

[0002]

2. Description of the Related Art There are various types of mouthpieces used in conventional vacuum cleaners. Some of them have an air turbine utilizing a flow of suction air and a rotary brush having a motor as a driving source. .

[0003] The mouthpiece provided with an electric motor has a large and heavy suction port due to the size and weight of the electric motor itself. Further, since electric wiring from the cleaner body to the suction body is required, there are problems that the hose becomes heavy, and the flexibility of the hose is lost, resulting in poor operability. Also, it becomes difficult to disassemble and assemble for connection, separation and arrangement of electric wiring.

In view of the above, there has been proposed a mouthpiece having a rotary brush using a suction force as a driving source. This kind of mouthpiece is
The air turbine and the rotating brush are arranged before and after in the direction crossing the longitudinal direction of the mouthpiece, and the rotation of the air turbine is reduced by a pulley or a belt and transmitted to the rotating brush. For this reason, an electric motor is not required for driving the rotating brush, and the weight is excellent. Further, electric wiring from the cleaner body side to the suction body is not required, and the hose is excellent in weight reduction and operability.

[0005] A suction port of a vacuum cleaner described in Japanese Patent Application Laid-Open No. 9-10142 is known as a suction body provided with a rotary brush driven by a suction force. This inlet is
An air turbine that is rotated by the suction air of the vacuum cleaner is provided in the suction port main body, and a rotary brush driven by the air turbine via a transmission mechanism is provided. A turbine in which an air turbine is provided at the suction port main body at a suction port of a vacuum cleaner provided at a front portion of the main body and having a driving pipe through which a suction pipe flows in communication with a rotating brush chamber at a rear center of the suction port main body. The chamber is partitioned from the rotating brush chamber and the drive pipe, and the suction port body is provided with an intake hole for sucking external air into the turbine chamber, and the partition wall between the rotating brush chamber and the rotating brush chamber communicates with the turbine chamber. Has a mouth.

[0006]

Problems to be Solved by the Invention Japanese Patent Laid-Open No. 9-10142
In the suction port described in the publication, the suction port is provided on the rear side wall of the suction port main body, and the external air flowing into the turbine chamber from the suction port drives the air turbine,
The air flows into the rotary brush chamber from a communication port communicating with the rotary brush chamber, and at this time, air flows substantially perpendicularly to the rotary brush axis.

According to this configuration, the air flowing into the turbine from the intake hole collides with the turbine blade, the air is reversed by the reaction force, and flows along the flow path wall surface of the turbine blade and the blade to the intake hole side. Will be returned. The returned air passes between the outer periphery of the turbine and the case, or passes through the space between the end face side of the turbine and the case and flows to the rotating brush chamber.

[0008] That is, in the air turbine system in the above-mentioned prior art, an appropriate space for air to pass is required between the air turbine and the air intake hole and around the air turbine (upper, lower, left and right). This is a constraint when determining the size of the suction body.

Further, in such a configuration, in order to increase the dust-raising force by increasing the torque of the air turbine, the diameter of the air turbine must be increased. The height and the width in the front-rear direction (rear side of the suction port main body) are large, and the suction port main body is large and heavy.

In order to increase the torque without changing the diameter of the air turbine, it is necessary to form a nozzle or the like around the turbine to increase the speed of the air flowing in from the outside. Is a factor that increases.

Conventionally, a so-called Pelton turbine is often used as an air turbine. However, in this Pelton turbine, since the torque of the turbine is obtained by increasing the inflow speed, noise tends to increase. There is a problem that.

[0012] In addition, the above publication also describes a suction port in which the rotation axis of the air turbine is disposed perpendicular to the bottom surface of the suction port main body and a rotation direction conversion mechanism for changing the rotation direction of the air turbine is provided. Although this is excellent for reducing the height of the suction port main body, it is disadvantageous in terms of increasing the number of parts and simplifying the assemblability. Further, the width of the suction port main body in the front-rear direction is increased, and the suction port main body also tends to be large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and to provide a vacuum cleaner having good dust collection performance and a suction body thereof, while suppressing noise, maintaining small size and light weight, improving torque of a rotary brush, and improving the dust collection performance. is there.

[0014]

In order to achieve the above object, according to the present invention, in a mouthpiece having a rotary brush and a turbine for generating a driving force for the rotary brush, air is used as a turbine and a rotating shaft of the turbine is provided. The axial flow turbine is arranged such that the rotation axis of the axial flow turbine is substantially parallel to the rotation axis of the rotating brush and is shifted in a direction crossing the rotation axis. Is located upstream of the nozzle.

At this time, an air passage (intake passage) for sucking air from outside the suction body is provided on one side of the axial flow turbine in the rotation axis direction, and the rotating brush is used for rotating the air flowing into the axial flow turbine on the other side. It is preferable to provide an air passage (exit passage) for flowing into the disposed chamber.

The rotary brush is a rotary member provided inside the mouthpiece and driven to rotate. The rotary brush is a rotary member provided with a brush or a soft blade-like member singly or in a mixed manner.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described.
The embodiment will be described in detail with reference to the drawings.

FIG. 1 shows the appearance of a vacuum cleaner according to this embodiment. A vacuum cleaner main body 100 having a built-in dust collecting chamber equipped with an electric blower and a filter for suction, and a hand operating portion 300 connected to a tip of a hose 200 connected to the dust collecting chamber of the vacuum cleaner main body 100 via an extension pipe 400. Provided with the sucked body 500.
The suction body 500 includes a rotating brush that is driven to rotate by using the flow of suction air, and an air turbine (hereinafter, meaning a nozzle and an impeller) connected to the rotating brush.

The rotating brush used in the following embodiments is a rotating body provided inside the mouthpiece 500 and driven to rotate, and is provided such that a brush, a soft blade-like member, or the like is used alone or mixed. Rotating member.

The mouthpiece 500 is divided into upper and lower parts at a height of substantially the center thereof, and the lower case 5 forming an outer shell is formed.
20 and an upper case 51 detachable from the lower case 520.
0 and the brush cover 525. The upper case 510 has an intake port 511 on an upper surface side and a side surface for allowing outside air to flow into the air turbine.

In the mouthpiece 500, the universal joint 515 is fitted in the lower case 520, and the upper case 510 is connected to the universal joint 515.
Is fixed to the lower case 520 so as to cover a part of.
A shock absorbing bumper 516 is attached to the outer periphery of the position where the upper case 510 and the lower case 520 come into contact with each other to maintain airtightness and prevent damage to furniture and the like.

FIG. 2 is a plan view of mouthpiece 500 with upper case 510 removed.

The lower case 520 has a cleaning floor surface (a surface to be cleaned).
A suction port 521 is provided on the bottom surface facing the
1, a brush chamber 30 for accommodating a rotating brush 530 for scraping dust on the floor, a turbine chamber 10 for accommodating an air turbine, and a rotating brush 53 for rotating the air turbine.
Belt chamber 2 containing timing belt 5 transmitting to zero
It consists of 0. The rotating brush 530 is provided in the brush chamber 30 formed inside the mouthpiece 500, and functions as a rotating cleaning body that acts on a cleaning surface when driven to rotate to enhance a cleaning effect. The fact that the rotating brush acts on the surface to be cleaned means that the brush or the blade directly contacts the surface to be cleaned or the hair of a carpet or the like laid on the surface to be cleaned, and the surface to be cleaned by the air current created by the rotating brush ( (The surface to be cleaned).

At the rear of the suction main body 500, there is a suction joint 515 connected to the extension pipe 400 of the vacuum cleaner, and there is a rotatable casing 514 for raising and lowering the same. Further, a suction passage 31 communicating with the brush chamber 30 is formed in front of the casing 514, and the turbine chamber 10 and the brush chamber 3 are connected to each other.
A communication port 32 connecting 0 is provided.

The rotating brush 530 spirally raises a plurality of brushes 532 that scrape up dust on the outer peripheral surface of the substantially cylindrical base 531, and one end of the cylindrical base 531 is connected to the bearing unit 5.
33 is fitted to and supported by the bearing holding portion 522 of the lower case 520, and the other end of the cylindrical base 531 is provided with a pulley 535 fitted and attached to the other end of the shaft holding portion 52 of the lower case 520.
3 and supported.

The air turbine is composed of a nozzle 1, an impeller 2, an impeller shaft 3 and a turbine casing 4. The impeller shaft 3 is arranged in parallel with the rotating brush 530 and behind the brush chamber 30 (on the side of the cleaner body 100). And the turbine chamber 10
It is stored in. Further, the turbine in the present embodiment is an axial turbine in which a fluid, that is, air flows in the direction of its rotation axis.

FIG. 3 is a perspective view of the suction main body 500. The upper case 510 is provided with an external air inlet 511 comprising a plurality of holes from the upper surface to the rear surface of the case. further,
A filter 513 for preventing minute dust from entering is provided inside the external intake port 511.

Next, the operation of the first embodiment of the present invention will be described.

The arrows in the figure represent the flow of air. When the vacuum cleaner user operates the hand switch arranged near the hand operation unit 300, the electric blower in the vacuum cleaner main body 100 is operated in an operation mode according to the operated switch.
The suction force generated by the electric blower is
It reaches the mouthpiece 500 through the extension pipe 400.

When the suction body is placed on the carpet, the suction port 521 of the suction body 500 is blocked by the carpet. As shown in FIG. It becomes lower than the pressure of the outside air around the suction body, and the upper cover 51 of the suction body 500
Outside air enters through the air inlet 511, passes through the filter 513, passes through the nozzle 1, rotates the impeller 2 and generates torque.
0 to rotate the rotating brush 530. Then, the air discharged from the impeller passes through the communication port 32 between the brush chamber 30 and the turbine chamber 20 and flows into the brush chamber 30 to efficiently remove the dust scooped up by the rotating brush 530, and the suction passage. 31.

FIG. 5 is a longitudinal sectional view of the communication port 32 between the brush chamber 30 and the turbine chamber 20. As indicated by the arrow in the figure, by causing the exhaust flow from the impeller 2 to collide with the brush 532 of the rotating brush 530, a rotating force can be applied to the rotating brush 530, and the cleaning effect can be further enhanced.

In this embodiment, since the air flowing into the air turbine supplies clean air of the outside air, the air sucked by the impeller contains much less dust.
If the external intake port is located near the surface to be cleaned, dust may be sucked.

Therefore, as in the present embodiment, the external intake port 5
11 is provided only on the upper case 510 side which is remote from the surface to be cleaned, and keeps the distance h from the surface to be cleaned to the air inlet,
Care is taken not to suck in dust.

FIG. 4 is an enlarged view of the air turbine portion. In the air turbine used in the present embodiment, the impeller 2 is fixed to the impeller shaft 3, and the nozzle 1 is arranged on the upstream side in the axial direction. A filter 513 is provided in front of the filter 513 so that dust does not enter the nozzle when the dust enters from the intake port 511.

The nozzle 1 is formed of a plurality of blades, the outer periphery of which is integrally formed with a turbine case 4 which covers the impeller, has a bearing holding portion therein, and has a built-in bearing. 2 is supported by a nozzle 1 and a bearing support member 6.

Since the nozzle 1 has a built-in bearing holding portion, it is possible to prevent dust mixed in the sucked air from adhering to the bearing. Further, since the axial length of the impeller shaft 3 can be shortened, the weight can be reduced, and problems such as vibration due to eccentricity and runout of the impeller are reduced.

As described above, the nozzle has a built-in bearing holding portion, and thus has a role of preventing dust from adhering to the bearing and a role as a support member for supporting the impeller.

Thus, there is no need to install an obstacle such as a column holding the bearing on the upstream side of the nozzle, so that the air flowing into the impeller can be guided smoothly.

Thus, parts can be simplified, and a simple and low-cost structure can be achieved.

The air flowing from the intake port 511 is
It is guided by the nozzle 1, flows into the impeller 2, rotates the impeller 2, and generates torque. in this way,
Since the flow from the inlet flows in almost the same direction (axial direction) from the nozzle inlet to the impeller outlet, the fluid loss due to bending and friction is reduced, and the efficiency of the air turbine (hereinafter referred to as axial flow turbine) is reduced. Can be increased.

On the other hand, in other turbines, since the flow direction at the nozzle inlet and the flow direction at the turbine outlet are different, loss due to bending or separation increases by that amount.
Turbine efficiency was reduced.

On the other hand, in order to improve the dust collection performance, it is important to increase the scraping force of the rotating brush. In order to increase the scraping force of the rotating brush, the torque of the air turbine transmitted to the rotating brush may be increased. The most effective way to increase the torque of the air turbine is to increase the diameter of the turbine.

As in the present embodiment, in the suction body having a simple structure in which the rotational force of the air turbine is reduced via the timing belt and transmitted to the rotating brush, the diameter of the impeller is adjusted so that the torque becomes the same. The size of the suction body of the axial flow turbine system of this embodiment example and the size of the suction body of another air turbine system in the case of the same are compared.

In an air turbine system different from this embodiment,
Since it is necessary to provide a nozzle in the outer peripheral direction of the impeller, the diameter of the turbine including the nozzle increases, and the size as an air turbine increases. Therefore, the suction port body is large and heavy, and the suction port body cannot be inserted into a space such as under a desk where a vertical gap is narrow or a gap between furniture and furniture. Gets worse.

On the other hand, in the case of the axial flow turbine system of this embodiment, the nozzle can be provided on the upstream side in the axial direction of the impeller, so that the diameter of the impeller and the diameter of the turbine can be made substantially the same. The body can be downsized.

Since the axial flow turbine is disposed in parallel with the rotating brush, the axial length including the nozzle is long. However, the structure of the suction main body is the same as the axial length of the turbine. Since there is room in space, even if the turbine is long, it does not affect the size of the suction main body.

Therefore, the mouthpiece body can be reduced in size and weight, and a convenient one can be provided.

In other words, when the size of the suction main body is limited, the diameter of the impeller must be reduced by installing a nozzle or the like in the suction body using another air turbine system, so that the torque is reduced. As a result, the scraping force of the rotating brush is reduced, and the dust collecting performance is reduced. On the other hand, the suction body of the axial flow turbine system does not need to reduce the diameter of the impeller even if the nozzle is installed, so that the torque is increased and the scraping force of the rotating brush is increased as compared with the former.
The dust collection performance will be improved.

In the case of this embodiment, the turbine case 4
There is a gap between the inner peripheral surface of the impeller and the outer periphery of the impeller 2, and a part of the air discharged from the nozzle tends to flow in the outer peripheral direction through this gap. Since the area of the gap is reduced, the amount of air flowing into the impeller can be increased, and the torque generated by the impeller can be increased. Therefore, to increase the torque,
It is desirable to make the gap between the outer diameter of the impeller and the case as small as possible and make the diameter of the turbine as large as possible.
In the present embodiment, the gap amount is set to 1 mm or less.

Next, regarding the noise generated in the turbine,
A comparison will be made between the axial turbine system of this embodiment and another air turbine system.

In an air turbine system different from that of the present embodiment, in order to increase the torque, it is necessary to increase the speed at which the gas flows out of the nozzle, and as the speed increases, the noise also increases. In addition, by bringing the outlet end face of the nozzle close to the outer peripheral end face of the turbine blade, the flow surely flows into the turbine blade, thereby increasing the torque.However, since the turbine blade passes through the high-speed airflow, the impact on the blade is reduced. As a result, the noise becomes loud, and in particular, a blade rotation sound having a fundamental order based on the product of the number of blades and the number of rotations, which is annoying, is likely to be generated.

On the other hand, in the case of the axial flow turbine system of this embodiment, since the nozzle and the impeller face each other, even if the flow velocity from the nozzle is increased, the nozzle is dispersed in the circumferential direction and flows into the impeller. The noise hardly changes. Further, an experimental result has been obtained in which the torque and the noise hardly change even if the axial gap between the nozzle and the impeller is changed by about 1 to 5 mm. This means that when the flow exiting the nozzle flows into the impeller, most of the flow will pass through the impeller because it is covered by the turbine case. Therefore,
Depending on the degree of the gap, even if the speed of the flow into the impeller slightly changes, it surely flows into the impeller, so the torque does not decrease,
The noise is not expected to increase.

As described above, since the axial flow turbine system in which the intake air flow is efficiently moved in the axial direction as in the present embodiment is used for the suction main body, it is small and lightweight, has high dust collection performance, and has a high efficiency. It can provide a quiet mouthpiece.

As shown in FIG. 4, the turbine case 4 including the impeller 2 is configured as a unit,
It becomes detachable from the suction main body 500, and the maintenance property is improved, such as replacing the filter 513 and cleaning the inside of the turbine chamber 10.

On the other hand, the air that has flowed in from the outside passes through the filter and then travels toward the nozzle 1 so that the flow flows in a rectified state. Occurrence can be suppressed. Further, fine dust floating in the air can be held by the filter.

Further, the partition plate forming the passage 31 for guiding to the suction passage and the turbine chamber 10 has a role of performing a rectifying action when flowing into the nozzle 1 on the intake side, and the suction port 521.
From the air to the suction passage 31 smoothly.

When the suction body 500 is lifted, most of the air is sucked from the suction port 521, so that almost no air flows into the suction port 511 flowing from the outside, and does not flow into the turbine chamber 10, so that the air turbine does not rotate. . Therefore, it is safe even if the user accidentally puts his hand in the mouthpiece.

In this embodiment, as described above, the rotational force of the air turbine is reduced via the small pulley 534, the large pulley 535, and the timing belt 5 and transmitted to the rotating brush 530. Since the power is transmitted to the brush 530, the torque of the rotary brush 530 can be improved while reducing the size and weight of the mouthpiece 500.

As a result, the number of rotations of the air turbine and the number of rotations of the rotary brush 530 can be appropriately set, so that the air turbine can be operated near high efficiency and the transmission loss due to the belt 5 can be reduced. There is also an effect that the total efficiency can be improved even if the difference is subtracted. In this embodiment, the rotation speed of the rotary brush 350 is set to about 3000 r / min and the reduction ratio is set to about 1/3.
min.

Further, since the length of the rotary brush 530 is shorter than the length of the suction body 500 in the longitudinal direction only by the width of the large pulley 535, the effective width of dust can be hardly reduced, so that cleaning can be performed. This has the effect of expanding the range.

In the above embodiment, the communication port 32 for connecting the turbine chamber 10 and the brush chamber 30 is provided. In addition, the communication port 32 for connecting the turbine chamber 10 to the belt chamber 20 and the belt chamber 20 to the brush chamber 30 is provided. By installing a mouth (not shown), the air discharged from the impeller causes the belt chamber 2
0, a flow toward the brush chamber 30 is generated, so that dust does not adhere to the belt chamber 20, the rotational force of the impeller 2 can be smoothly performed, and a highly reliable suction body is provided. it can.

As described above, according to this embodiment, since the air flowing into the air turbine supplies clean air of the outside air, dust does not enter the nozzle 1 and the impeller 2 and can be used for a long time. The performance of the turbine can be ensured, and the exhaust flow from the impeller 2 is
Of the rotating brush 53
A turning force to zero can be added, the cleaning effect is further enhanced, and the dust collection performance is improved.

As described above, since the rotating brush can be driven without using a driving means such as a motor, there is no need for wiring or a switch for lifting, so that an inexpensive, small and lightweight suction body can be provided. .

By reducing the size of the suction body, it becomes easy to clean a narrow gap in the vertical direction between the floor and the furniture and a narrow gap in the horizontal direction between the furniture and the wall or between the furniture and the furniture. The usability of the mouthpiece is improved. (Second Embodiment) In the second embodiment, a suction port having a built-in air turbine and a speed reduction mechanism is formed at a suction port of a vacuum cleaner, and the air turbine is provided with a rotary brush 53.
The vacuum cleaner is arranged on the cleaner body 100 side in parallel with 0 and has two air turbines arranged symmetrically. The vacuum cleaner main body, the hose, the hand operation unit, and the extension pipe are common to the vacuum cleaner according to the first embodiment described above, and thus the description thereof is omitted.

FIG. 6 is a plan view of the mouthpiece 500 with the upper case 510 removed. Components common to those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

The air turbine has a nozzle 1, an impeller 2,
It is composed of an impeller shaft 11 and has a symmetrical shape. The impeller is fixed to a shaft 11, and both ends of the shaft are held by bearings 12. A pulley 534 for transmitting a rotational force is fitted on one end of the impeller shaft 11.

Here, the torque generated by the impeller is substantially determined by the amount of air flowing into the impeller and the pressure difference before and after the impeller. This pressure difference is considered to be substantially the same as the difference between the atmospheric pressure and the pressure generated in the suction port. If this pressure difference is large, the torque will be large, but the suction port will be attracted to the cleaning surface, making it difficult to operate. If the pressure difference is too small, the torque will be small, and dust will not be able to be sucked. Therefore, the suction opening is required to have a sufficient torque that is easy to operate, maintains an appropriate suction force, and further scrapes up dust.

For example, assuming that the pressure difference is 1000 Pa, the air volume is 0.5 m ³ /
When a torque of 0.5 N · cm is generated in two minutes, when two air turbines are used, the air pressure is doubled to 1.0 m ³ / min with the same pressure difference of 1000 Pa, and the torque is also doubled. 1 N · cm is generated. Therefore, the torque transmitted to the rotating brush can also be increased.

In order to increase the torque with one air turbine, there is a means to increase the outer diameter of the impeller 2 or to increase the amount of air flowing into the impeller 2, but the former has a disadvantage that the entire suction port becomes large. As described above, the latter has a problem in that the pressure in the suction port increases, so that the suction port is attracted to the cleaning surface.

As described above, according to the present embodiment, the use of two air turbines for the suction body makes it possible to provide a small and lightweight suction body with a large torque. Further, there is an effect that a function such as wiping or polishing on the flooring can be added, which cannot be realized by the conventional method due to insufficient torque.

Further, since the left and right positions of the turbine are symmetrical, the usability is improved, for example, the mass balance is improved when the suction body is operated (for example, when the suction body is lifted). (Third Embodiment) In the third embodiment, a suction port having a built-in air turbine and a speed reduction mechanism is formed at a suction port of a vacuum cleaner.
The suction port of the suction main body is connected to the turbine chamber by a communication port, and the suction port for taking in air from the outside is formed in the suction main body on the upstream side of the turbine. Vacuum cleaner. The vacuum cleaner main body, the hose, the hand operation unit, and the extension pipe are common to the vacuum cleaner in the first embodiment described above.
The illustration is omitted.

FIG. 6 is a plan view of the mouthpiece 500 with the upper case 510 removed. Components common to those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

The air turbine has a nozzle 51, an impeller 5
2. It is composed of the impeller shaft 53, is arranged on the cleaner body 100 side in parallel with the rotating brush 530, and is housed in the turbine chamber 10.

Inside the mouthpiece body, a suction nozzle, an external air and a bypass nozzle serving as a bypass passage at the time of lifting are arranged. is there.

FIG. 5 is a top view of the suction port of the above embodiment. The upper case 510 is provided with an external suction port 514 composed of a plurality of small holes, and a filter is installed inside the external suction port. are doing.

When the suction body is placed on the carpet, the suction port 521 of the suction body 500 is blocked by the carpet. As shown in FIG. It becomes lower than the pressure of the outside air around the suction body, and the upper cover 51 of the suction body 500
The outside air enters through the air inlet 514, passes through the filter, passes through the nozzle 51, rotates the impeller 52, and generates torque.
To rotate the rotating brush 530. And
The air discharged from the impeller 52 passes through the communication port 62 without passing through the brush chamber 30, flows into the suction passage 31, and heads toward the suction joint 515. On the other hand, the air flowing from the gap between the carpet and the suction body causes the rotating brush 530 to rotate.
Can be conveyed to the suction passage 31.

As described above, the airflow from the main body is separated into the airflow for driving the air turbine and the airflow for collecting dust.

According to this embodiment, since the communication port 62 connecting the turbine chamber 10 and the suction passage 31 is formed in the axial direction, all the airflow flowing from the nozzle 51 moves in the axial direction. There is no loss such as bending. Therefore, since the amount of air flowing into the impeller 52 increases, the torque can be improved, and the dust collection performance is improved.

Further, since the turbine chamber 20 and the brush chamber 30 are closed by a partition, there is no fear that dust enters the turbine chamber.

Further, by changing the opening area of the suction passage 31 by the switching lever 51 or the like, it becomes possible to change the distribution of the air flow for driving the air turbine and the air flow for collecting dust. Dust collection performance suitable for the cleaning surface can be obtained.

As described above, what is common to all the forms is
Since no electric parts are used in the suction body, if the bearing parts are made of a water-resistant material (for example, made of Glytron), there is also an effect that the entire suction mouth can be washed with water.

On floors and tatami mats, there is almost no sinking of the wheels, so there is a gap between the floor opening and the floor, and the amount of air sucked from the floor opening increases and flows through the impeller. Since the amount of air is reduced, the rotation of the impeller is suppressed. Furthermore, when the suction port 500 is lifted, the amount of air passing through the impeller becomes very small, the impeller hardly rotates, and it is safe even if a user accidentally puts a hand or the like into the suction port.

[0083]

According to the present invention, the rotary brush and the rotating shaft of the axial turbine are substantially parallel to each other, the nozzle is arranged in the axial direction of the axial turbine, and the flow of the air flowing to drive the axial turbine is controlled. By making it almost parallel to the rotating brush, the inflowed flow is from the nozzle inlet to the axial turbine impeller outlet.
Since the fluid flows in almost the same direction (axial direction), fluid loss due to bending and friction is reduced, and the efficiency of the air turbine can be increased. Further, there is no need to form an air passage on the outer periphery of the turbine, so that the size and weight are reduced. In addition, it is possible to provide a suction body that is quiet and has high dust collecting performance.

[Brief description of the drawings]

FIG. 1 is an external view of a vacuum cleaner according to the present invention.

FIG. 2 is a plan view of the mouthpiece according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a mouthpiece according to a first embodiment of the present invention.

FIG. 4 is a partially enlarged view of the turbine of the mouthpiece shown in FIG. 2;

FIG. 5 is a vertical sectional view taken along line AA of the mouthpiece shown in FIG. 2;

FIG. 6 is a plan view of a mouthpiece according to a second embodiment of the present invention.

FIG. 7 is a plan view of a mouthpiece according to a third embodiment of the present invention.

[Explanation of symbols]

500: mouthpiece, 520: lower case, 510: upper case, 530: rotating brush, 1: nozzle, 2: impeller, 3
... impeller shaft, 4 ... turbine case, 10 ... turbine room,
20: belt chamber, 30: brush chamber, 31: suction passage,
32 ... communication port, 511 ... intake port, 515 ... suction port joint, 5
21 ... Suction port.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenichi Tomita 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi Taga Electronics Co., Ltd. (72) Inventor Koji Iwase 502, Kandate-cho, Tsuchiura-shi, Ibaraki F-term (reference) in Mechanical Laboratory, Hitachi Ltd. 3B061 AD05 AE05

Claims (4)

[Claims] 1. A cleaner body having an electric blower, a suction body provided at an end of an air passage communicating with the electric blower and having an opening facing a surface to be cleaned, and provided in the middle of the air passage. A dust collecting unit for storing dust sucked from the suction body, and a vacuum cleaner including a rotating brush and a turbine for driving the rotating brush in the suction body, wherein the air is the turbine. An axial flow turbine that flows in the direction of the rotating shaft is used, and the rotating shaft of the axial flow turbine is arranged so as to be substantially parallel to the rotating shaft of the rotating brush and shifted in a direction crossing the rotating axis of the rotating brush. A vacuum cleaner having a nozzle disposed upstream of the axial flow turbine in the rotation axis direction. 2. The vacuum cleaner according to claim 1, wherein an air passage for sucking air from outside the suction body is provided on one side of the axial flow turbine in the rotation axis direction, and the air flows into the axial flow turbine on the other side. An air passage for flowing the heated air into a chamber in which a rotating brush formed in a suction body is disposed. 3. A vacuum cleaner comprising a rotary brush and a turbine for driving the rotary brush, wherein the turbine is an axial turbine in which air flows in the direction of the rotation axis of the turbine. The rotating shaft of the axial flow turbine is arranged so as to be substantially parallel to the rotating shaft of the rotating brush and shifted in a direction crossing the rotating shaft of the rotating brush, and the nozzle is arranged on the upstream side in the rotating shaft direction of the axial flow turbine. A mouthpiece for a vacuum cleaner, comprising: 4. The suction body of a vacuum cleaner according to claim 3, wherein an air passage for sucking air from outside of the suction body is provided on one side in the rotation axis direction of the axial flow turbine, and the axial flow is provided on the other side. An inlet for an electric vacuum cleaner, comprising an air passage for flowing air flowing into a turbine into a chamber in which a rotating brush formed in the inlet is disposed.