WO2020213075A1

WO2020213075A1 - Vacuum cleaner

Info

Publication number: WO2020213075A1
Application number: PCT/JP2019/016388
Authority: WO
Inventors: 玄寺尾; 佑哉直原; 一真比嘉
Original assignee: バルミューダ株式会社
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-10-22
Also published as: WO2020213653A1; JP2023175046A; JPWO2020213653A1

Abstract

[Problem] To provide a novel vacuum cleaner that makes it easy to perform operations such as the sliding of a suction head. [Solution] A suction head 2 sucks up waste material on a surface being cleaned. A front rotary brush 7 is provided to the suction head 2 so as to be parallel to the surface being cleaned. A rear rotary brush 8 is provided to the suction head 2 so as to be parallel to the surface being cleaned and aligned with the front rotary brush 7, contacts the surface being cleaned together with the front rotary brush 7, and rotates in the inverse direction from the front rotary brush 7. A drive mechanism 9 drives the front and rear rotary brushes 7, 8.

Description

Vacuum cleaner

The present invention relates to a vacuum cleaner, and particularly to a rotating brush mounted on a suction head.

Conventionally, a vacuum cleaner equipped with a plurality of rotating brushes on a suction head that sucks dust on the cleaning surface is known. For example, Patent Document 1 discloses a floor cleaning device having a pair of rotating brushes arranged in front of and behind the nozzle body. These rotating brushes rotate in directions opposite to each other by the driving force of the motor, and are displaced up and down according to the front-back operation of the nozzle body. That is, when the nozzle body is pushed forward, the rear rotating brush that gives a positive force to this pushing force bites into the carpet and comes into contact with it, and the front rotating brush that gives a reaction force to this pushing force is the carpet. It becomes more floating and separated. In addition, when the nozzle body is pulled backward, the front rotating brush that gives a positive force to this pulling force bites into the carpet and makes contact, and the rear rotating brush that gives a reaction force to this pulling force is the carpet. It becomes more floating and separated. In this way, one of the front and rear rotating nozzles comes into contact with the carpet and the other is separated from the carpet according to the front-back operation of the nozzle body, so that the nozzle body can be moved back and forth without resistance.

Further, Patent Document 2 discloses a vacuum cleaner head having a first roller and a second roller arranged in the front-rear direction. The first roller is rotatable when moved in the first direction on the cleaning surface and is prevented from rotating when moved in the opposite second direction. The second roller is rotatable when moved in the second direction on the cleaning surface and is prevented from rotating when moved in the first direction.

Japanese Unexamined Patent Publication No. 11-225932 Special Table 2018-534040

An object of the present invention is to provide a novel vacuum cleaner that realizes a light operability such as slipping of a suction head.

In order to solve such a problem, the present invention provides a vacuum cleaner having a suction head, a first rotating brush, a second rotating brush, and a drive mechanism. The suction head sucks dust on the cleaning surface. The first rotating brush is arranged parallel to the cleaning surface in the suction head. The second rotating brush is arranged parallel to the cleaning surface and alongside the first rotating brush in the suction head, is in contact with the cleaning surface together with the first rotating brush, and rotates in the direction opposite to that of the first rotating brush. To do. The drive mechanism drives the first rotary brush and the second rotary brush.

Here, in the present invention, a caster portion may be provided. This caster portion is provided at the lower part of the suction head so as to be rollable, and keeps the contact height of the first rotating brush and the contact height of the second rotating brush with respect to the cleaning surface constant. In this case, it is preferable that the caster portion is provided between the first rotating brush and the second rotating brush. Further, the caster portion may have a first caster portion provided on the left side portion of the suction head and a second caster portion provided on the right side portion of the suction head.

In the present invention, it is preferable that the first force generated by the rotation of the first rotating brush and the second force generated by the rotation of the second rotating brush cancel each other out. In this case, the first force (T1 / r1 if the torque of the first rotating brush is T1 and its radius is r1) and the second force (T2 of the torque of the second rotating brush and its radius). If is r2, the absolute value may be the same as T2 / r2) and the direction may be opposite. In this case, the first force is the product of the coefficient of friction μ between the first rotating brush and the cleaning surface, the dispersed mass m1 of the first rotating brush, and the gravitational acceleration g (μ *). The second force, which is larger than m1 * g), is the coefficient of friction μ between the second rotating brush and the cleaning surface, the dispersed mass m2 of the second rotating brush, and the gravitational acceleration g. It is desirable that it is larger than the multiplication value (μ * m2 * g).

In the present invention, the first rotating brush and the second rotating brush may be arranged before and after the suction head.

According to the present invention, by rotating the first and second rotating brushes in opposite directions to cancel each other's advancing forces, it is possible to realize a light operability such as sliding of the suction head.

External perspective view of the vacuum cleaner External perspective view of the suction head Schematic bottom view of the suction head Expanded perspective view of the suction head Sectional view of suction head Explanatory drawing of mechanical action in a rotating brush alone Explanatory drawing of mechanical action in a pair of rotating brushes

FIG. 1 is an external perspective view of the stick-type vacuum cleaner according to the present embodiment. The vacuum cleaner 1 is mainly composed of a suction head 2, a main body portion 3, and a handle rod portion 4. The suction head 2 sucks dust on the cleaning surface (ground). Here, the "head" of the suction head 2 is used to mean a place such as the head or the tip portion, and the shape thereof is not particularly limited including the size relationship with the stick body described later. .. It is not particularly limited. Further, the suction head 2 refers to a member or a structure that sucks dust facing the cleaning surface, and it does not matter whether the suction motor (suction source) is mounted on the suction head 2 itself.

The main body 3 and the handle rod 4 are integrated, and as a whole, form a stick body extending upward from the suction head 2 in a rod shape. The main body 3 is a tubular member, and a suction motor, a dust storage portion, a rechargeable battery, and the like are housed inside the main body portion 3. The handle rod portion 4 is attached to the upper end of the main body portion 4 and extends upward. By arranging the heavy main body 3 below the suction head 2, the feeling of weight given to the user is reduced. The user operates the vacuum cleaner 1 by grasping the handle bar portion 4 with his / her hand. Further, above the handle bar portion 4, operation buttons such as an on / off switch are provided at appropriate positions.

The suction head 2 and the main body 3 (stick body) are connected via a universal joint 5. Specifically, a suction port 2a penetrating the upper and lower parts is provided substantially in the center of the suction head 2, and a universal joint portion is provided in the substantially center of the upper part of the suction head 2 in positional correspondence with the suction port 2a. One end of 5 is attached. That is, the suction port 2a is a flow path for dust sucked by the suction head 2, and also serves as a mounting portion for the universal joint portion 5. Further, the other end of the universal joint portion 5 is attached to the lower end of the main body portion 3. As a result, the stick body in which the main body portion 3 and the handle rod portion 4 are integrated can be located on the axis of the suction port 2a and can be freely tilted at an arbitrary angle in all directions. Although omitted in the figure, the outer circumference of the universal joint portion 5 may be made of a resin material or the like in order to prevent the dust flow path from the suction port 2a on the head portion 2 side to the main body portion 3 to leak out. It is covered with a flexible material.

FIG. 2 is an external perspective view of the suction head 2. The suction head 2 includes a pair of rotating

brushes

7 and 8 attached to the inside of the cover body 6. As will be described later, the cover body 6 is configured by assembling a plurality of cover members. The pair of rotating

brushes

7 and 8 have a function of partially grounding and contacting the cleaning surface to scrape out dust that has entered the cleaning surface. In the present embodiment, these

rotating brushes

7 and 8 are arranged side by side in front of and behind the suction head 2, more specifically, in front of and behind the suction port 2a. The front rotary brush 7 is rotatably attached to a rotary shaft A1 extending parallel to the cleaning surface in the width direction of the suction head 2. Further, the rear rotary brush 8 is rotatably attached to the rotary shaft A2 extending parallel to the cleaning surface in the width direction of the suction head 2.

The

rotary brushes

7 and 8 are rotationally driven by a drive mechanism 9 (including a drive source such as a motor) built in each of them or housed in a side portion of the cover body 6. The feature of this embodiment is that the

rotating brushes

7 and 8 rotate in opposite directions to each other. As an example, the front rotating brush 7 rotates counterclockwise and the rear rotating brush 8 rotates clockwise. The rotary drive of the

rotary brushes

7 and 8 may be performed by distributing the power generated by a single drive source by a plurality of power transmission mechanisms, or each of the plurality of drive sources may be distributed by the

rotary brushes

7 and 8. May be assigned individually to.

FIG. 3 is a schematic bottom view of the suction head 2. A caster portion 10 is provided at the lower part of the suction head 2. The caster portion 10 can roll freely in all directions, and for example, a ball type or a wheel type can be used. The caster portion 10 is arranged between the front and rear

rotating brushes

7 and 8, more preferably at the center (on the center line) of the rotating axes A1 and A2. The reason why the caster portion 10 is arranged in the center is that when the vacuum cleaner is operated, one of the

rotating brushes

7 and 8 is grounded to the cleaning surface with the caster portion 10 as a fulcrum to improve the efficiency of scraping out dust. Further, in the present embodiment, a plurality of caster portions 10 are provided, one on the left side portion of the suction head 2 and the other on the right side portion of the suction head 2.

FIG. 4 is a developed perspective view of the suction head 2. The cover body 6 described above is composed of an upper cover 6a, a pair of side covers 6b and 6c, and a pair of roller covers 6d and 6e. The upper cover 6a has a plate shape extending in the width direction of the suction head 2, and a suction port 2a is provided substantially in the center thereof. Side covers 6b and 6c are attached to both ends (left and right ends) of the upper cover 6a, respectively, and these side covers 6b and 6c rotatably accommodate the front rotating brush 7 and the roller cover 6d. The rear rotary brush 8 is fixed in a sandwiched state with the roller cover 6e in which the rotary brush 8 is rotatably housed. Further, caster portions 10 are attached to substantially the center of the lower portion of the roller cover 6d and substantially the center of the lower portion of the roller cover 6e, respectively. Further, a suction portion 11 for partitioning a space for sucking dust on the cleaning surface is attached to the lower part of the upper cover 6a by the suction force of the suction motor.

FIG. 5 is a cross-sectional view of the suction head 2. The ground planes of the caster portion 10 and the

rotating brushes

7 and 8 are set slightly lower on the same plane or on the installation surface of the

rotating brushes

7 and 8. The caster portion 10 has a function of generating rolling with the cleaning surface in order to reduce its own wear, and also has a function of maintaining a constant contact height of the

rotating brushes

7 and 8 with respect to the cleaning surface. .. Since soft brushes are attached around the rotating

brushes

7 and 8, if the caster portion 10 is not provided, the suction head 2 may sink and come into contact with the cleaning surface, which may damage the cleaning surface or prevent it from slipping. .. Therefore, by providing the caster portion 10 under the suction head 2, such a situation can be avoided in advance.

FIG. 6 is an explanatory diagram of the mechanical action of the rotating brush (roller) alone. When a rotating brush having a mass m and a radius r performs a rotary motion to generate torque T while in contact with the cleaning surface (ground), a force of T / r = F is generated on the cleaning surface. .. Let μ be the coefficient of friction between the cleaning surface and the rotating brush. Since the cleaning surface of the rotating brush is fixed, it proceeds by reaction. This occurs under the condition of T / r <μmg when the environment is simplified. This principle is similar to the principle that a car runs and that it is not affected by the weight when carrying an object with a roller.

On the other hand, under the condition of T / r> μmg, for example, when the torque T is sufficiently large or when the friction coefficient μ between the rotating brush and the cleaning surface is sufficiently small, the rotating brush slips and does not proceed. , The rotating brush rotates on the spot and slides as if it floats. In this embodiment, such a phenomenon is used for the

rotating brushes

7 and 8. That is, regarding the force generated by the rotation of the rotating brush 7 (T1 / r1 when the torque of the rotating brush 7 is T1 and its radius is r1), the friction coefficient μ between the rotating brush 7 and the cleaning surface and the rotating brush It is set to be larger than the product value (μ * m1 * g) of the dispersion mass m1 of 7 and the gravitational acceleration g. Regarding the force generated by the rotation of the rotating brush 8 (T2 / r2 when the torque of the rotating brush 8 is T2 and its radius is r2), the friction coefficient μ between the rotating brush 8 and the cleaning surface and the rotating brush It is set to be larger than the product value (μ * m2 * g) of the dispersion mass m2 of 8 and the gravitational acceleration g. Here, the "dispersed mass m1 and m2" is the mass in which the total weight Mg of the suction head 2 is dispersed in the respective

rotating brushes

7 and 8, and m1 + m2 = Mg. From the above viewpoint, it is preferable that the friction coefficient μ is small, and as a specific method, it is desirable to devise a material for the

rotating brushes

7 and 8 having a lower friction coefficient μ.

FIG. 7 is an explanatory diagram of the mechanical action of the pair of

rotating brushes

7 and 8. When a pair of

rotating brushes

7 and 8 are opposed to each other and rotated with the same torque and in opposite directions, if the absolute values of the forces are the same and the directions are opposite, the rotating

brushes

7 and 8 The power to move is offset by each other. Here, the “offset” includes not only the case where the mutual forces are completely offset, but also the case where the difference between the mutual forces becomes small to the extent that the action and effect that the user can operate lightly is exhibited. Further, by acting with the caster portion 10 as a fulcrum, the ground contact surface of the

rotating brushes

7 and 8 is reduced, so that the instantaneous friction coefficient is reduced, and the

rotating brushes

7 and 8 rotate while the suction head 2 stays in place. To do. Since the friction coefficient is reduced, the suction head 2 is in a floating state, and the advancing forces cancel each other out, so that the user (operator) can smoothly move the suction head 2 in a desired direction. Further, since the caster portion 10 moves freely in any direction, it does not interfere with the movement operation of the user, and can realize parallel movement in the left-right direction, which has been difficult in the past.

As described above, according to the present embodiment, the rotating

brushes

7 and 8 provided in the suction head 2 are rotated in opposite directions to cancel each other's advancing forces, so that the suction head 2 has a light sliding operability. It can be realized.

Further, according to the present embodiment, by providing the caster portion 10 under the suction head 2, even if the

rotating brushes

7 and 8 are soft, the contact heights thereof can be kept constant. As a result, the slippery and light operability of the suction head 2 can be realized at a higher level.

Further, according to the present embodiment, the rod-shaped member in which the main body portion 3 and the handle rod portion 4 are integrated is located on the axis of the suction port 2a, and is located in all directions by the function of the universal joint portion 5. It can be tilted freely at any angle. As a result, the suction head 2 can be freely moved in an arbitrary direction without being conscious of the front and back as a user's operation feeling.

In the above-described embodiment, an example in which two

rotating brushes

7 and 8 are mounted on the suction head 2 has been described, but the present invention is not limited to this, and as long as the mounting space of the suction head 2 allows. A larger number of rotating brushes may be mounted.

1 Vacuum cleaner 2 Suction head 2a Suction port 3 Main body 4 Handle rod 5 Universal joint 6 Cover 6a Top cover 6b, 6c Side cover 6d, 6e

Roller cover

7, 8 Rotating brush 9 Drive mechanism 10 Caster 11 Suction Department

Claims

In the vacuum cleaner
With a suction head that sucks dust on the cleaning surface,
In the suction head, a first rotating brush arranged parallel to the cleaning surface and
A second suction head, which is arranged parallel to the cleaning surface and side by side with the first rotating brush, is in contact with the cleaning surface together with the first rotating brush, and rotates in a direction opposite to that of the first rotating brush. Rotating brush and
A drive mechanism for driving the first rotating brush and the second rotating brush,
A vacuum cleaner characterized by having.
It is characterized by further having a caster portion which is provided at the lower part of the suction head so as to be rollable and keeps the contact height of the first rotating brush and the contact height of the second rotating brush constant with respect to the cleaning surface. The vacuum cleaner according to claim 1.
The vacuum cleaner according to claim 2, wherein the caster portion is provided between the first rotating brush and the second rotating brush.
The third aspect of claim 3, wherein the caster portion has a first caster portion provided on the left side portion of the suction head and a second caster portion provided on the right side portion of the suction head. Vacuum cleaner.
The cleaning according to claim 1, wherein the first force generated by the rotation of the first rotating brush and the second force generated by the rotation of the second rotating brush cancel each other out. Machine.
The first force (T1 / r1 if the torque of the first rotating brush is T1 and its radius is r1) and the second force (T2 of the torque of the second rotating brush and its radius) The vacuum cleaner according to claim 5, wherein the r2 is T2 / r2) and the absolute values are the same and the directions are opposite to each other.
The first force is a product (μ * m1 *) of the friction coefficient μ between the first rotating brush and the cleaning surface, the dispersed mass m1 applied to the first rotating brush, and the gravitational acceleration g. The second force, which is larger than g), is the friction coefficient μ between the second rotating brush and the cleaning surface, the dispersed mass m2 applied to the second rotating brush, and the gravitational acceleration g. The cleaning machine according to claim 6, wherein the cleaning value is larger than the multiplication value (μ * m2 * g) of.
The vacuum cleaner according to claim 1, wherein the first rotating brush and the second rotating brush are arranged in front of and behind the suction head.