JP2021112667A - Suction tool of cleaner and vacuum cleaner - Google Patents

Abstract

To provide a suction tool of a cleaner and vacuum cleaner for improving suction efficiency.SOLUTION: A suction tool of a cleaner includes: a connection pipe to be directly or indirectly connected to a cleaner body; a first brush storage part where at least a lower part is opened; a second brush storage part where at least a lower part is opened; a suction opening opened between the first storage part and the second brush storage part; a housing having a suction blow passage for allowing the suction opening to communicate with the connection pipe; a first rotary brush arranged in the first brush storage part; and a second rotary brush arranged in the second brush storage part. The first rotary brush includes a shielding part for shielding at least a part of a gap between the first brush storage part and the first rotary brush.SELECTED DRAWING: Figure 5

Description

Embodiments of the present invention relate to vacuum cleaner suction tools and vacuum cleaners.

Conventionally, as a suction tool for an electric vacuum cleaner, a rotating brush is provided in the opening, and the rotating brush rotates with respect to the surface to be cleaned during suction cleaning, so that dust on the surface to be cleaned is sucked while being sucked. Ingredients have been proposed. Such a suction tool has an advantage that dust can be scraped out by a rotating brush, but since the rotating brush is arranged, a gap is likely to be generated inside the suction tool. Therefore, the suction efficiency tends to decrease.

JP-A-2017-104711

An object to be solved by the present invention is to provide a vacuum cleaner suction tool and an electric vacuum cleaner capable of improving suction efficiency.

The suction tool for a vacuum cleaner according to the embodiment includes a connecting pipe that is directly or indirectly connected to the vacuum cleaner main body, a first brush accommodating portion that is open at least downward, and a second brush that is open at least downward. A housing having a storage portion, a suction opening opened between the first brush storage portion and the second brush storage portion, and a suction air passage for communicating the suction opening and the connecting pipe, and the first. A first rotating brush arranged in one brush accommodating portion and a second rotating brush arranged in the second brush accommodating portion are provided, and the first rotating brush includes the first brush accommodating portion and the first rotating brush. It has a shielding portion that shields at least a part of the gap between the rotating brush and the brush.

The perspective view of the vacuum cleaner which concerns on embodiment. The perspective view of the suction tool for a vacuum cleaner which concerns on embodiment. Top view of the suction tool for a vacuum cleaner according to the embodiment. The bottom view of the suction tool for a vacuum cleaner according to an embodiment. FIG. 2 is a cross-sectional view taken along the line VV shown in FIG. FIG. 3 is a cross-sectional view taken along the line VI-VI shown in FIG. The perspective view which shows the inside of the suction tool for a vacuum cleaner which concerns on embodiment. The perspective view which shows the 1st brush of an embodiment. The perspective view which shows the 2nd brush of an embodiment. FIG. 5 is a cross-sectional view of a modified example of the suction tool for a vacuum cleaner according to the embodiment.

Hereinafter, the vacuum cleaner suction tool and the vacuum cleaner of the embodiment will be described with reference to the drawings. FIG. 1 is a perspective view of the vacuum cleaner 100 according to the present embodiment.

The vacuum cleaner 100 includes a vacuum cleaner main body 200 and a vacuum cleaner suction tool 1 (hereinafter, referred to as "suction tool"). The vacuum cleaner 100 further includes an extension pipe 300. The suction tool 1 is used by being connected to the suction port 203 of the vacuum cleaner main body 200 via the extension pipe 300. Hereinafter, a cordless type having a built-in secondary battery unit 206, a so-called stick-type vacuum cleaner will be described as an example. However, the vacuum cleaner 100 and the suction tool 1 are not limited to the cordless type and the stick type, for example, a so-called canister type having a vacuum cleaner body including wheels, a power cord, and a power source connected to a commercial power source. It is also applicable to cord type type and other vacuum cleaners.

The vacuum cleaner main body 200 includes an electric blower 201, a dust collecting unit 202, a secondary battery unit 206, a control unit 208, a suction port 203, and a handle 204. The electric blower 201, the secondary battery unit 206, and the control unit 208 are housed in the housing 2. The suction port 203 and the handle 204 are formed in the housing 2.

The handle 204 is a portion gripped by the user of the vacuum cleaner 100. The handle 204 is provided at one end of the housing 2. The handle 204 is provided with a plurality of setting buttons 207 for switching the power supply and drive mode of the vacuum cleaner 100.

The suction port 203 is an opening to which the extension pipe 300 is attached. The suction port 203 has a tubular shape and is connected to a suction path (not shown) of the electric blower 201 via a dust collector 202. The suction port 203 is provided with a lock portion 205. The lock portion 205 is a clamp-type engaging mechanism that holds the extension tube 300 inserted into the suction port 203 in an engaged state.

The electric blower 201 includes a motor called a fan motor or a main motor and an impeller rotated by the motor, and is driven to generate a negative pressure. Examples of the motor of the electric blower 201 include, but are not limited to, a DC motor, and various motors can be used. The electric blower 201 is configured to suck air from the suction port 203 or the like by the generated negative pressure and exhaust the air from the exhaust port 209 to the outside of the vacuum cleaner main body 200.

The dust collecting unit 202 is detachably attached to the housing 2. The dust collecting unit 202 is a device that separates dust contained in the air sucked into the vacuum cleaner main body 200 by the action of the electric blower 201. The dust collecting portion 202 is attached to the front of the handle 204 and above the suction port 203. The downstream end of the flow path of the dust collector 202 is connected to the suction path of the electric blower 201. The dust collecting unit 202 includes a dust accommodating unit 2021 and a dust separator 2022. With the dust collecting unit 202 mounted on the housing 2, the dust collecting unit 202 communicates with the rear end of the suction port 203, and the dust separator 2022 collects dust from the air containing dust sucked from the suction port 203. Separated, the separated dust is stored in the dust accommodating portion 2021.

The secondary battery unit 206 is electrically connected to a charging device (not shown) to be charged. The secondary battery unit 206 supplies the vacuum cleaner 100 with the electric power required for the vacuum cleaner 100 to operate. For example, the secondary battery unit 206 supplies electric power to the electric blower 201, the motors 51 and 52 in the suction tool 1, the control unit 208, and the like.

The electric blower 201 is controlled by the control unit 208. The control unit 208 is a control board including, for example, a microcomputer. The control unit 208 includes, for example, a drive control unit that operates the electric blower 201 and the like in response to a user operation by pressing the setting button 207. The control unit 208 may include a charging circuit unit such as a constant current circuit that charges a secondary battery by receiving power from an external power source such as a commercial AC power supply. The control board includes a printed wiring board provided with a wiring pattern and a plurality of electronic components mounted on the printed wiring board.

FIG. 2 is a perspective view of the vacuum cleaner suction tool 1 according to the present embodiment. FIG. 3 is a top view of the suction tool 1 for a vacuum cleaner. FIG. 4 is a bottom view of the suction tool 1 for a vacuum cleaner. FIG. 5 is a cross-sectional view taken along the line VV shown in FIG. FIG. 6 is a cross-sectional view taken along the line VI-VI shown in FIG. The suction tool 1 includes a connecting pipe 9, a housing 2, a first rotating brush 3, a second rotating brush 4, and a shielding portion 7. The suction tool 1 further includes motors 51 and 52, a control unit 10, and an electric connector 93.

As shown in FIGS. 2 to 4, the suction tool 1 is provided with a connecting pipe 9 at the center in the longitudinal direction of the housing 2 having a substantially rectangular top view. In the following description, the side where the connecting pipe 9 is provided is referred to as the rear side of the suction tool 1, and the side of the housing 2 opposite to the side where the connecting pipe 9 is provided is referred to as the front side of the suction tool 1. The arrow FR shown in FIG. 3 is referred to as a forward direction, and the arrow RR is referred to as a backward direction. A first rotating brush 3 and a second rotating brush 4 are provided in the housing 2 along the longitudinal direction of the housing 2. In the first rotating brush 3 and the second rotating brush 4, the axes of the rotating shafts 31 and 41 are arranged in parallel. The first rotating brush 3 is arranged on the front side of the housing 2, and the second rotating brush 4 is arranged on the rear side of the first rotating brush 3 (on the connecting pipe 9 side). The connecting pipe 9 extends in a direction orthogonal to the axes of the rotating shafts 31 and 41 of the rotating brushes 3 and 4. Hereinafter, the direction in which the rotating shafts 31 and 41 of the rotating brushes 3 and 4 extend is referred to as a rotation axis direction.

The connecting pipe 9 is a tubular member that is directly or indirectly connected to the vacuum cleaner main body 200. For example, the connecting pipe 9 can be connected to the extension pipe 300 of the vacuum cleaner 100. The upper end 94 of the connecting pipe 9 is connected to the extension pipe 300. A lock portion 210 is provided at the lower end of the extension pipe 300. The lock portion 210 maintains the connected state between the extension pipe 300 and the connecting pipe 9. The opening shape of the suction port 203 and the configuration of the lock portion 205 are the same as the opening shape of the lower end portion of the extension pipe 300 and the configuration of the lock portion 210. Therefore, the connecting pipe 9 can be connected to the lower end portion of the extension pipe 300 and the suction port 203.

The lower end 95 of the connecting pipe 9 is inserted into the connecting port 21 of the housing 2. An electric connector 93 is provided on the upper surface of the connecting pipe 9. The electric connector 93 is electrically connected to the control unit 10 and the motors 51 and 52, which will be described later. The electric connector 93 is electrically connected to the electric connector (not shown) of the extension pipe 300, and the control unit 10 and the motors 51 and 52 are energized from the secondary battery unit 206 of the vacuum cleaner main body 200.

The housing 2 has an accommodating portion 6, a suction opening 22, and a suction air passage 26. The housing 2 further includes a connecting port 21 and a suction port 28. The connecting port 21 is an opening formed at a substantially central portion in the rotation axis direction at the rear end of the housing 2, into which the connecting pipe 9 is inserted. As shown in FIG. 5, the connecting port 21 has a substantially spherical hollow portion, and the connecting pipe 9 is inserted and engaged with the hollow portion. The upper portion 211 of the connecting port 21 is in sliding contact with the upper arc portion of the lower end portion 95 of the connecting pipe 9. The connecting pipe 9 is rotatably connected to the connecting port 21 in the vertical direction and the horizontal direction (rotational axis direction). A brush 92 is provided on the lower surface of the lower end portion 95 of the connecting pipe 9 to block the ventilation of the gap with the connecting port 21.

The housing 2 is provided with a suction air passage 26 at a substantially central portion in the rotation axis direction of the housing 2. The suction air passage 26 communicates with the connecting port 21 and extends forward from the connecting port 21, and the suction opening 22 which is the front end of the suction air passage 26 opens to a substantially central portion in the front-rear direction of the housing 2. The suction opening 22 is open to the accommodating portion 6. The suction opening 22 of the suction air passage 26 is opened between the first rotating brush 3 and the second rotating brush 4. The suction air passage 26 is arranged above the second rotating brush accommodating portion 62, which will be described later, and is a passage that connects the connecting port 21 and the suction opening 22.

The suction opening 22 opens only in the central portion of the housing 2 in the direction of the rotation axis. The suction opening 22 may be opened to a part of the suction opening 22 in the rotation axis direction, and is not limited to the central portion.

The suction opening 22 is formed in a substantially rectangular shape that is long along the rotation axis direction of the first rotation brush 3 and the second rotation brush 4. The suction opening 22 is lower at the rear end 222 than at the front end 221 and opens diagonally forward. The suction opening 22 has a front end 221 opened at a position higher than the rotation center axis O3 of the first rotation brush 3 and the rotation center axis O4 of the second rotation brush 4.

At least a part (for example, all) of the suction opening 22 may be opened at a position higher than the rotation center axis O3 of the first rotation brush 3. At least a part (for example, all) of the suction opening 22 may be opened at a position higher than the rotation center axis O4 of the second rotation brush 4.

As shown in FIG. 4, the suction port 28 is formed on the lower surface 29 of the housing 2. The suction port 28 has a rectangular opening shape that opens from the front end of the housing 2 and has dimensions such that the first rotating brush 3 and the second rotating brush 4 are exposed from the lower surface 29.

A housing portion 6 is formed above the suction port 28. The lower part of the accommodating portion 6 is opened by the suction port 28. The accommodating portion 6 includes a first rotating brush accommodating portion 61 (hereinafter, referred to as “first brush accommodating portion”) and a second rotating brush accommodating portion 62 (hereinafter, referred to as “second brush accommodating portion”). .. As shown in FIG. 5, in the accommodating portion 6, the first brush accommodating portion 61 is provided at the front end portion of the housing 2, and the suction opening 22 opens adjacent to the rear end of the first brush accommodating portion 61. A second brush accommodating portion 62 is provided adjacent to the rear end 222 of the suction opening 22.

As shown in FIG. 2, a front opening 27 through which the first rotating brush 3 is exposed is formed on the front end surface 24 of the housing 2. As shown in FIG. 5, the front end portion of the first rotating brush 3 is arranged so as to be exposed in front of the front opening 27. With this configuration, it is easy for dust to be caught in the suction opening 22 side.

The first brush accommodating portion 61 and the second brush accommodating portion 62 each have curved recesses 611 and 621. The first rotating brush 3 is accommodated below the recess 611 of the first brush accommodating portion 61, and the second rotating brush 4 is accommodated below the recess 621 of the second brush accommodating portion 62. Each recess 611, 621 has a curved shape along the outer shape of each of the rotating brushes 3 and 4. The rotating brushes 3 and 4 are attached so that the recesses 611 and 621 and the outer edges of the rotating brushes 3 and 4 are slightly separated from each other. Therefore, the accommodating portion 6 is formed with a gap that does not hinder the rotation of the rotating brushes 3 and 4 and minimizes the gap between the accommodating portion 6 and the surface F to be cleaned.

In the present description, "accommodated in the accommodating portion" and "arranged in the accommodating portion" mean that at least a part of the target member is arranged in the accommodating portion, and a part of the target member is of the accommodating portion. Including the case where it protrudes to the outside.

The first brush accommodating portion 61 is provided at a position higher than the suction opening 22. The recess 621 of the second brush accommodating portion 62 has an arcuate surface larger than 180 degrees. The front end portion of the second brush accommodating portion 62 extends downward from the suction opening 22 as a protruding wall 622, and further extends to a position lower than the rotation central axis O4 of the second rotating brush 4. The rear end portion of the second brush accommodating portion 62 extends to a position lower than the suction opening 22, and further extends to a position lower than the rotation center axis O4 of the second rotating brush 4. The rear end portion of the second brush accommodating portion 62 is connected to the lower surface 29 of the suction tool 1.

A shielding portion 7 is provided on the inner surface of the recess 611 of the first brush accommodating portion 61. The shielding portion 7 is a member that shields at least a part of the gap between the recess 611 of the first brush accommodating portion 61 and the outer edge of the first rotating brush 3. The shielding portion 7 is provided so as to project from the recess 611 of the first brush accommodating portion 61 toward the first rotating brush 3. The shielding portion 7 is arranged at a position higher than the rear end 222 (lower end) of the suction opening 22. The shielding portion 7 is provided at the rear end portion of the first brush accommodating portion 61. The shielding portion 7 extends in the direction of the rotation axis along the first rotation brush 3. More specifically, the shielding portion 7 is provided over the entire length of the recess 611 in the rotation axis direction.

The shielding portion 7 is made of, for example, a soft member such as a sponge, a brush, soft rubber, or felt. The shielding portion 7 and the first rotating brush 3 are not in close contact with each other, and have a slight gap so as not to interfere with the rotational operation of the first rotating brush 3. The shielding of the gap by the shielding portion 7 does not completely block the ventilation of the gap, but is a part of the gap between the inner surface of the first brush accommodating portion 61 (inner surface of the accommodating portion 6) and the outer periphery of the first rotating brush 3. Anything that has the effect of shielding and reducing the amount of airflow may be used.

The shielding portion 7 is formed in an arc shape that matches the shape of the arc-shaped recess 611 of the first brush accommodating portion 61. The position where the shielding portion 7 is provided is such that the dimension of the shielding portion 7 is less than half the size of the first brush accommodating portion 61 in the rotation direction of the first rotating brush 3.

A protruding wall 622 protruding downward is provided at a boundary portion between the second brush accommodating portion 62 and the suction opening 22. The lower end of the protruding wall 622 is lower than the suction opening 22. The protruding wall 622 extends downward to a height substantially equal to the height of the rotation center axis of the second rotating brush 4.

The housing 2 further includes a drive mechanism accommodating portion 63. FIG. 7 is a perspective view showing the upper lid 25 of the housing 2 omitted. As shown in FIGS. 6 and 7, the drive mechanism accommodating portion 63 is a space between the accommodating portion 6 and the upper lid 25, and the motors 51 and 52 and the control unit 10 (schematically shown in FIG. 7) are included. It is contained. The drive mechanism accommodating unit 63 is isolated from the accommodating unit 6, and the motors 51 and 52 and the control unit 10 are isolated from the rotating brushes 3 and 4 and the suction air passage 26 above the accommodating unit 6 and accommodated. Has been done.

The motors 51 and 52 include a first motor 51 that drives the first rotary brush 3 and a second motor 52 that drives the second rotary brush 4. The first motor 51 and the second motor 52 can rotate independently. The first motor 51 and the second motor 52 are provided at both ends in the rotation axis direction at intervals. A suction air passage 26 and a control unit 10 are provided between the first motor 51 and the second motor 52.

Next, the configurations of the first rotating brush 3 and the second rotating brush 4 will be described.

The first rotating brush 3 and the second rotating brush 4 are respectively arranged in the accommodating portion 6, both ends of the rotating shafts 31 and 41 are rotatably supported by the housing 2, and a drive (not shown) is provided. It is connected to the motors 51 and 52 via a force transmission mechanism.

As shown in FIGS. 5 and 6, the space between the first rotating brush 3 and the second rotating brush 4 in the accommodating portion 6 is referred to as a dust collecting chamber 23. The dust collecting chamber 23 is formed with a space surrounded by the surface to be cleaned F when the suction tool 1 is used. Although the details will be described later, the dust on the surface to be cleaned F scraped out by the first rotating brush 3 is collected in the dust collecting chamber 23 and sucked from the suction opening 22.

The first rotating brush 3 and the second rotating brush 4 rotate in opposite directions. The first rotating brush 3 rotates forward from the front side to the rear side (counterclockwise in FIG. 5), which is the forward direction of the suction tool 1, and the second rotating brush 4 rotates backward from the rear side to the front side (in FIG. 5). (Clockwise).

The outer diameter D3 of the first rotating brush 3 attached to the front end of the housing 2 is larger than the outer diameter D4 of the second rotating brush 4 (see FIG. 4).

The first rotating brush 3 is provided with a cylindrical tubular portion 33 extrapolated to the rotating shaft 31. In the first rotating brush 3, a plurality of first raised bands 32 are attached to the outer peripheral surface of the tubular portion 33. The first raised band 32 is a long strip in which a plurality of raised bands are embedded. The first brushed band 32 is a component of the brush that comes into contact with the surface to be cleaned F and scrapes out dust on the surface to be cleaned F as the first rotating brush 3 rotates. FIG. 8 is a perspective view of the tubular portion 33 and the first raised band 32 of the first rotating brush 3. As shown in FIG. 8, a plurality of first raised bands 32 having the same shape are spirally arranged with respect to the rotation axis and engaged with the outer peripheral surface of the tubular portion 33. In the first rotating brush 3, most of the outer peripheral surface is covered with a plurality of raised bands 32 arranged in a spiral shape.

The first brushed band 32 is composed of a wide band having a width of 32 W (see FIG. 6) in the rotation direction of the first rotating brush 3 on the outer peripheral surface of the first rotating brush 3. The wide band has a width of 32 W of the first raised band 32 larger than the gap between the plurality of first raised bands 32 in the rotation direction of the first rotating brush 3.

The width 32W of the first brushed band 32 is set according to the diameter of the first rotating brush 3. That is, when the diameter of the first rotating brush 3 is large, the contact area with the surface to be cleaned F becomes large. When the width 32W of the first brushed band 32 in the rotation direction is set to 65% or more of the outer peripheral length of the first rotating brush 3 in consideration of the contact area with the surface F to be cleaned, the dust collecting effect and the dust collecting effect and The degree of vacuum in the space between the surface to be cleaned F and the dust collecting chamber 23 can be increased. In addition, the first raised band 32 may be formed on the entire circumference of the first rotating brush 3 without any gap.

The first raised band 32 and the shielding portion 7 may or may not be in contact with each other. When the first raised band 32 and the shielding portion 7 come into contact with each other, the airtightness in the dust collecting chamber 23 can be further improved.

One second rotating brush 4 is provided in the second brush accommodating portion 62 along the rotation axis direction. The second rotating brush 4 has a length substantially equal to the length in the rotation axis direction of the first rotating brush 3.

Similar to the first rotating brush 3, the second rotating brush 4 is provided with a cylindrical tubular portion 43 extrapolated to the rotating shaft 41. The second rotating brush 4 has a dimension in the rotation axis direction that is at least half the length of the housing 2.

In the second rotating brush 4, a plurality of second raised bands 42 are attached to the outer peripheral surface of the tubular portion 43. FIG. 9 is a perspective view of the tubular portion 43 and the second raised band 42 of the second rotating brush 4. As shown in FIG. 9, a plurality of second raised bands 42 having the same shape are spirally arranged with respect to the rotation shaft and engaged with the outer peripheral surface of the tubular portion 43. The second brushed band 42 is composed of hard brushed cloth. The second raised band 42 has a larger amount of hard brushed than the first raised band 32. As a result, the hardness of the entire brush of the second rotating brush 4 is harder than the hardness of the entire brush of the first rotating brush 3. Here, the phrase "the amount of hard brushing is larger" in the second rotating brush 4 includes the case where the first rotating brush 3 does not have hard brushing.

The first brushed band 32 has a higher brushing density than the second brushed band 42. The densities of the brushed zones 32 and 42 are the amount of brushed implants per unit area.

Next, the operation and usage of the electric blower 201 and the suction tool 1 will be described. As shown in FIG. 1, when the suction tool 1 is used, the extension pipe 300 is inserted into the suction port 203 of the vacuum cleaner main body 200, and the lock portion 205 maintains the engaged state between the extension pipe 300 and the suction port 203. .. The connecting pipe 9 of the suction tool 1 is inserted into the tip of the extension pipe 300, and the locking portion 210 keeps the connecting pipe 9 mechanically and electrically connected to the extension pipe 300.

When the power of the vacuum cleaner main body 200 is turned on by operating the setting button 207 with the lower surface 29 of the suction tool 1 arranged on the surface to be cleaned F, the suction operation is started and the suction operation is started from the connecting pipe 9 and the suction air passage 26. Suction is started. At the same time, the suction tool 1 is also energized, the motors 51 and 52 are driven by the control unit 10, the first rotating brush 3 rotates in the forward direction, and the second rotating brush 4 rotates in the reverse direction.

When the suction tool 1 moves to the forward FR by the user's operation in the suction state, the dust in front of the suction tool 1 is collected by the suction force of the vacuum cleaner main body 200 while being scraped out by the forward rotation of the first rotating brush 3. It is guided into the dust chamber 23. At this time, since the shielding portion 7 is provided, ventilation in the front-rear direction in the gap between the first rotating brush 3 and the first brush accommodating portion 61 can be suppressed. As a result, the degree of vacuum in the space between the dust collecting chamber 23 and the surface F to be cleaned at the time of suction can be increased, and the dust suction efficiency can be improved.

Further, since the second rotating brush 4 rotates in the reverse direction during the suction, the dust in front of the second rotating brush 4 can be guided to the dust collecting chamber 23 side as the suction tool 1 moves in the forward direction. As a result, the dust collection efficiency of the suction tool 1 is improved.

Further, since the second brush accommodating portion 62 is provided with the protruding wall 622 at the boundary portion with the suction opening 22, the dust scraped backward by the first rotating brush 3 rotates in the reverse direction. It is possible to prevent the second rotating brush 4 from entering between the second rotating brush 4 and the second brush accommodating portion 62.

The suction tool 1 has a contact portion between the first rotating brush 3 and the second rotating brush 4 and the surface to be cleaned F, and a shielding portion 7, so that the gap through which the dust collecting chamber 23 communicates with the inside and outside of the accommodating portion 6 is reduced. It can be suppressed and the degree of vacuum can be increased. As a result, the suction tool 1 can improve the dust collecting performance.

According to the embodiment described above, since the shielding portion 7 is provided between the inner surface of the accommodating portion 6 and the first rotating brush 3, there is a gap between the first rotating brush 3 and the front end portion of the first brush accommodating portion 61. Can be shielded. As a result, the degree of vacuum in the space between the surface F to be cleaned and the dust collecting chamber 23 can be increased, and the suction performance of the suction tool 1 can be improved.

According to the embodiment described above, since the shielding portion 7 extends along the rotation axis of the first rotating brush 3, the gap between the first rotating brush 3 and the first brush accommodating portion 61 is first. The rotating brush 3 can be shielded over a wide range in the longitudinal direction. As a result, the degree of vacuum in the space between the surface F to be cleaned and the dust collecting chamber 23 can be increased, and the suction performance of the suction tool 1 can be improved.

According to the embodiment described above, since the outer diameter of the first rotating brush 3 is larger than the outer diameter of the second rotating brush 4, it is possible to secure a wide installation area of the first rotating brush 3 with respect to the surface F to be cleaned. As a result, the degree of vacuum in the space between the surface F to be cleaned and the dust collecting chamber 23 can be increased, and the suction performance of the suction tool 1 can be improved. Further, as a result that the outer diameter of the second rotating brush 4 is smaller than the outer diameter of the first rotating brush 3, the accommodation space for the motors 51, 52 and the like can be arranged in the vicinity of the second rotating brush 4, and the size can be reduced. .. As a result, the height of the suction tool 1 can be lowered, and the suction tool 1 can be easily entered into the gap having a low height during cleaning.

According to the embodiment described above, the accommodating portion 6 includes a first brush accommodating portion 61 accommodating the first rotating brush 3 and a second brush accommodating portion 62 accommodating the second rotating brush 4, and each brush. Since the accommodating portions 61 and 62 have a shape along the outer shape of the rotating brushes 3 and 4, the accommodating portions 6 can be formed along the rotating brushes 3 and 4. As a result, the gap between each of the rotating brushes 3 and 4 and the accommodating portion 6 can be suppressed to a small size. Since the shielding portion 7 is provided between the inner surface of the first brush accommodating portion 61 arranged in front of the suction tool 1 and the first rotating brush 3, it is between the surface to be cleaned F and the dust collecting chamber 23. The degree of vacuum in the space can be increased, and the suction performance of the suction tool 1 can be improved.

According to the embodiment described above, since the suction opening 22 communicating with the connecting pipe 9 opens between the first rotating brush 3 and the second rotating brush 4, the first rotating brush 3 and the second rotating brush 4 Dust collected in the space between can be efficiently sucked. Further, the degree of vacuum in the space between the dust collecting chamber 23 between the first rotating brush 3 and the second rotating brush 4 and the surface F to be cleaned can be increased, and the suction performance of the suction tool 1 is improved. be able to.

According to the embodiment described above, the shielding portion 7 is formed so as to project from the inner surface of the accommodating portion 6 on the first rotating brush 3 side of the suction opening 22. That is, since it is formed in the first brush accommodating portion 61 in front of the suction opening 22, the space in front of the suction tool 1 is shielded and the space between the surface to be cleaned F and the dust collecting chamber 23 is evacuated. The degree can be increased, and the suction performance of the suction tool 1 can be improved.

According to the embodiment described above, since the first motor 51 for driving the first rotating brush 3 and the second motor 52 for driving the second rotating brush 4 are provided, the first rotating brush rotates in opposite directions to each other. 3 and the second rotating brush 4 can be driven individually. Therefore, the power transmission mechanism from the motors 51 and 52 to the rotating brushes 3 and 4 can be simply configured, and the suction tool 1 can be miniaturized. As a result, the suction tool 1 can be miniaturized, and the suction tool 1 can be easily inserted into a narrow gap during cleaning. In addition, as a result of being able to drive the first rotating brush 3 and the second rotating brush 4 by individual motors 51 and 52, for example, the rotating speeds of the rotating brushes 3 and 4 can be changed and driven.

According to the embodiment described above, since the second rotating brush 4 is composed of one brush having a length substantially equal to the longitudinal dimension of the first rotating brush 3, dust is uniformly distributed in the rotation axis direction. Can be recovered.

According to the embodiment described above, since the shielding portion 7 is made of a soft member, the gap between the first rotating brush 3 and the first brush accommodating portion 61 can be formed without hindering the rotation of the first rotating brush 3. Can be shielded. As a result, it is possible to prevent an increase in the load for driving the first rotating brush 3 and reduce the current value when the first rotating brush 3 is driven.

According to the embodiment described above, since the second rotating brush 4 is composed of a hard brushed band, the second rotating brush 4 can effectively scrape out the dust on the surface F to be cleaned, and the suction tool. The dust collection performance of 1 can be improved.

According to the embodiment described above, since the first brushed band 32 of the first rotating brush 3 has a higher density than the second brushed band of the second rotating brush 4, the surface to be cleaned F and the first rotating brush 3 The air shielding property of the contact portion can be ensured, and the degree of vacuum in the space between the surface to be cleaned F and the dust collecting chamber 23 can be improved. In addition, by adopting the second brushed band 42 having a low density for the second rotating brush 4, for example, when the surface F to be cleaned is a carpet or the like, the effect of scraping out the dust is high, and the dust of the suction tool 1 is removed. The collection effect can be enhanced.

According to the embodiment described above, the first raised band 32 of the first rotating brush 3 is formed of a wide band having a wide width in the rotation direction of the first rotating brush 3, and therefore comes into contact with the surface F to be cleaned. A large area can be secured. Therefore, the degree of vacuum in the space between the surface to be cleaned F and the dust collecting chamber 23 can be increased. As a result, the suction performance of the suction tool 1 can be improved.

According to the embodiment described above, since the vacuum cleaner 100 includes the suction tool 1, the degree of vacuum in the space between the surface to be cleaned F and the dust collecting chamber 23 can be increased. As a result, the suction performance of the suction tool 1 can be improved. In addition, the vacuum cleaner 100 can enhance the effect of collecting dust. Further, as a result of the miniaturization of the suction tool 1, the electric vacuum cleaner 100 can easily clean a gap having a low height at the time of cleaning.

In the above embodiment, an example is shown in which the shielding portion 7 has a dimension substantially equal to the length of the first rotating brush 3, but the configuration of the shielding portion 7 is not limited to this. For example, a plurality of short shielding portions may be arranged side by side in the rotation axis direction. In this case, there may be a gap between the plurality of shielding portions. For example, in the direction of the rotation axis, the shielding portion 7 may be provided at a position corresponding to the suction opening 22. In this case, if the dimension of the shielding portion 7 in the rotation axis direction is larger than the suction opening 22, the function of suppressing the decrease in the degree of vacuum in the dust collecting chamber 23 by the shielding portion 7 can be effectively exhibited.

In the above embodiment, an example in which the shielding portion 7 is formed of a soft member is shown, but the configuration of the shielding portion 7 is not limited to this. For example, there may be an example in which the shielding portion is formed of a hard member, or an example in which the first brush accommodating portion 61 partially protrudes and the first brush accommodating portion and the shielding portion are integrally formed.

In the above embodiment, an example is shown in which the shielding portion 7 is provided at the rear end portion of the recess 611, which is near the boundary portion between the first brush accommodating portion 61 and the suction opening 22, but the position of the shielding portion is this. Not limited to. The shielding portion prevents the dust collecting chamber 23 from being ventilated to the outside of the suction tool 1 due to the gap between the first brush accommodating portion 61 and the first rotating brush 3 to reduce the degree of vacuum inside the dust collecting chamber 23. It may be a configuration. Therefore, for example, even if the shielding portion 7 is provided in the first brush accommodating portion 61 at a position close to the front opening 27 (front end portion of the recess 611) or at the highest position of the recess 611 (center portion in the front-rear direction of the recess 611). good. When the shielding portion 7 is provided at the rear end of the recess 611, the shielding portion 7 is located upstream of the first rotating brush 3 in the forward rotation direction, and is located between the first brush accommodating portion 61 and the first rotating brush 3. Dust does not easily collect in the gap.

In addition, as in the modified example of the suction tool 1A shown in FIG. 10, a wall portion protruding downward from the boundary portion between the first brush accommodating portion 61 and the suction opening 22 may be formed as the shielding portion 7A.

In the above embodiment, the first raised band 32 of the first rotating brush 3 has a higher density than the second raised band 42 of the second rotating brush 4, but this configuration is not essential. For example, the density of the first raised band 32 and the density of the second raised band 42 may be the same. In addition, the density of the second raised zone 42 may be higher than the density of the first raised zone 32.

In the above embodiment, an example including the first motor 51 for the first rotary brush 3 and the second motor 52 for the second rotary brush 4 is shown, but the first rotary brush 3 and the second rotary brush 4 are used. It may be driven by one motor.

In the above embodiment, an example in which the suction tool 1 is provided with the control unit 10 is shown, but the control unit 10 is not essential. For example, the control unit may be configured such that the vacuum cleaner main body 200 is provided with the control unit and the motor is controlled through the electric connector 93 instead of the configuration provided in the suction tool 1.

In the above embodiment, an example in which the outer diameter of the first rotating brush 3 is larger than the outer diameter of the second rotating brush 4 is shown, but the forms of the rotating brushes 3 and 4 are not limited to this. For example, the outer diameter of the first rotating brush 3 and the outer diameter of the second rotating brush 4 may be substantially equal to each other.

In the above embodiment, an example of one second rotating brush 4 is shown, but a plurality of second rotating brushes 4 may be provided. For example, the second rotating brush may be provided on both sides of the suction air passage 26 in the direction of the rotation axis.

In the above embodiment, an example in which the plurality of first raised bands of the first rotating brush 3 have the same shape is shown, but the configuration of the first raised bands is not limited to this. For example, it may be a brushed band in which brushes having different widths in the rotation direction are alternately arranged in the rotation direction. The same applies to the second brushed band of the second rotating brush 4.

In the above embodiment, an example is shown in which the suction port 203 and the connecting pipe 9 of the suction tool 1 are connected via the extension pipe 300, but the extension pipe 300 is not essential. For example, the suction tool 1 may be directly attached to the suction port 203, or the connecting pipe 9 of the suction tool 1 may be long.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

1, 1A ... Vacuum cleaner suction tool, 2 ... Housing, 3 ... First rotating brush, 4 ... Second rotating brush, 6 ... Storage part, 7, 7A ... Shielding part, 9 ... connecting pipe, 22 ... suction opening, 32 ... first brushed band, 42 ... second brushed band, 51 ... first motor, 52 ... second motor , 100 ... Electric vacuum cleaner, 200 ... Vacuum cleaner body, 611 ... Recess

Claims (11)

With a connecting pipe that is directly or indirectly connected to the vacuum cleaner body,
At least the first brush housing with the lower part open,
At least the second brush housing with the lower part open,
A suction opening opened between the first brush accommodating portion and the second brush accommodating portion,
A housing having a suction air passage that allows the suction opening and the connecting pipe to communicate with each other.
The first rotating brush arranged in the first brush accommodating portion and
A second rotating brush arranged in the second brush accommodating portion is provided.
The first rotating brush includes a shielding portion that shields at least a part of a gap between the first rotating brush accommodating portion and the first rotating brush.
Vacuum cleaner suction device equipped with. The first brush accommodating portion has a curved concave portion along the outer shape of the first rotating brush.
The vacuum cleaner suction tool according to claim 1, wherein the shielding portion is an inner surface of the recess. The vacuum cleaner suction tool according to claim 1 or 2, wherein the shielding portion is integrally formed with the first brush accommodating portion. The suction tool for a vacuum cleaner according to any one of claims 1 to 3, wherein the shielding portion is formed so as to project from the inner surface of the first brush accommodating portion. The vacuum cleaner suction tool according to any one of claims 1 to 4, wherein the shielding portion is formed at a boundary portion between the first brush accommodating portion and the suction opening. The vacuum cleaner suction tool according to any one of claims 1 to 5, wherein the shielding portion extends along the rotation axis of the first rotating brush. The first rotary brush and the second rotary brush rotate in opposite directions from the contact portion side with the surface to be cleaned toward the suction opening, respectively, according to any one of claims 1 to 6. Vacuum cleaner suction tool. Any of claims 1 to 7, wherein the second rotating brush is composed of one rotating brush and has a length of half or more of the housing in a direction along the rotation axis of the second rotating brush. The suction tool for vacuum cleaners described in item 1. The first rotating brush has a plurality of first raised bands arranged in the rotation direction of the first rotating brush on the outer periphery thereof.
The vacuum cleaner according to any one of claims 1 to 8, wherein the width of the first raised band in the rotation direction is larger than the width of the gap between the plurality of first raised bands in the rotation direction. Suction tool for. The suction tool for a vacuum cleaner according to any one of claims 1 to 9, wherein the first rotating brush has a higher brushing density than the second rotating brush. With the vacuum cleaner body
The vacuum cleaner suction device according to any one of claims 1 to 10.
Vacuum cleaner equipped with.

Images