Cleaning device

Abstract

To provide an electrostatic cleaning device capable of stably collecting dusts.SOLUTION: A cleaning device captures dusts on a surface to be cleaned by static electricity and has: a frame body; a rotary brush rotatably supported by the frame body and provided with the brush part; driving means rotating the rotary brush; an opening exposing a part of the brush part outside the frame body; and a scrubbing member which negatively charges the brush part by scrubbing the brush part when the rotary brush rotates.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cleaning device that captures dust. [Background technology]

[0002] Conventionally, as a method for collecting dust on a floor surface, an electrostatic cleaning device that utilizes electrostatic force, which is advantageous in terms of quietness and exhaust-less operation, has been proposed. For example, in the cleaning device of Patent Document 1, a first rotating body and a second rotating body are rotatably provided on the device main body, a brush that slides against the floor surface and is frictionally charged is provided on the outer circumferential surface of the first rotating body, and the second rotating body is frictionally charged by a charging member inside the device. By pushing the device main body against the floor surface, the dust is positively frictionally charged, and the dust electrostatically adheres to the brush that has accumulated negative charges due to frictional charging. The dust electrostatically attached to the brush is peeled off from the brush by the second rotating body that is charged to a lower potential than the brush, and the dust electrostatically attached to the second rotating body is scraped off into the storage section by the blade. The first rotating body and the second rotating body are rotationally driven by one driving means, and the first rotating body is driven to rotate in a direction that propels the cleaning device main body against the floor surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-84993 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the cleaning device of Patent Document 1, the dust on the floor surface is charged by friction between the dust and the brush, and the dust is electrostatically attracted to the brush. In other words, the efficiency of dust collection depends on the charged state of the brush.

[0005] An object of the present invention is to provide an electrostatic cleaning device that can collect dust more stably. [Means for solving the problem]

[0006] The present invention provides a cleaning device that captures dust on a surface to be cleaned using static electricity, A frame body, A rotating brush rotatably supported by the frame and provided with a brush portion; A driving means for rotating the rotary brush; an opening for exposing a portion of the brush unit to the outside of the frame; a rubbing member that rubs against the brush portion when the rotating brush rotates, thereby charging the brush portion to a negative polarity; A cleaning device having the above structure.

[0007] The present invention provides a cleaning device that captures dust on a surface to be cleaned using static electricity, A frame body, A rotating brush rotatably supported by the frame and provided with a brush portion; A driving means for rotating the rotary brush; an opening for exposing a portion of the brush unit to the outside of the frame; a rubbing member that rubs against the brush portion when the rotating brush rotates; having The cleaning device is characterized in that, in a triboelectric series, the material of the rubbing member and the dust to be captured by the cleaning device are on the same side with respect to the material constituting the brush portion. Effect of the Invention

[0008] According to the present invention, it is possible to provide an electrostatic cleaning device that can collect dust more stably. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view showing a schematic configuration of a cleaning device according to a first embodiment. [Diagram 2] FIG. 1 is a perspective view showing a schematic configuration of a cleaning device according to a first embodiment. [Diagram 3] FIG. 11 is a cross-sectional view showing a schematic configuration of a cleaning device according to a second embodiment. [Figure 4] FIG. 11 is a cross-sectional view showing a schematic configuration of a cleaning device according to a modified example of the embodiment. [Diagram 5] FIG. 13 is a perspective view showing a schematic configuration of a cleaning device according to a modified example of the embodiment. [Figure 6] FIG. 11 is a cross-sectional view showing a schematic configuration of a cleaning device according to a modified example of the embodiment. [Figure 7] FIG. 11 is a cross-sectional view showing a schematic configuration of a cleaning device according to a modified example of the embodiment. [Figure 8] FIG. 11 is a cross-sectional view showing a schematic configuration of a cleaning device according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A preferred embodiment of the present invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in the embodiment are not intended to limit the scope of the present invention unless otherwise specified. Furthermore, the materials, shapes, etc. of the members once described in the following description will be the same as those described at the beginning unless otherwise specified.

[0011] Example 1 (Overall composition) The overall configuration of the cleaning device of the first embodiment will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram showing a cross section of an electrostatic cleaning device 1 according to the first embodiment. Figure 2 is a perspective view showing the external appearance of the cleaning device 1.

[0012] When a user grasps handle 11 of cleaning device 1 and moves it over floor surface 9, which is the surface to be cleaned, cleaning device 1 captures and collects dust on the surface to be cleaned by static electricity.

[0013] As shown in Fig. 1, the cleaning device 1 has a frame 8, a rotating brush 2, a motor 25, a rubbing member 3, a blade 51, a dust container 6, wheels 71 and wheels 72. The cleaning device 1 is provided with a handle 11, which extends in a direction intersecting the vertical direction when the cleaning device 1 is placed on a horizontal surface, making it easy for a user to grip the handle 11 from the rear of the cleaning device 1. Hereinafter, the direction in which the handle 11 extends from the cleaning device 1 will be referred to as the rear, and the opposite direction will be referred to as the front. In Figs. 1 and 2, the direction from the rear to the front is indicated by an arrow X.

[0014] The rotating brush 2 is rotatably supported by a frame 8. The rotating brush 2 has a shaft portion 21 rotatably supported by the frame 8, and a brush portion 22 attached to the shaft portion 21 and rotating integrally with the shaft portion 21. The rotating brush 2 is rotated in the direction of arrow R by a motor 25 serving as a driving means. The rotation direction R of the rotating brush 2 is counterclockwise in a cross section perpendicular to the shaft portion 21 of the rotating brush 2 and with the left of the drawing as the front as shown in FIG. 1.

[0015] An opening 82 is provided in the bottom of the frame 8, which faces the floor surface 9 when the cleaning device 1 is in use, and a part of the brush unit 22 is exposed from the opening 82 to the outside of the frame 8. The part of the brush unit 22 exposed from the opening 82 is configured to slide against the floor surface 9 when the cleaning device 1 moves over the floor surface 9 when the cleaning device 1 is in use.

[0016] The power supply to the motor 25 is performed by a known power supply means such as a battery or an external power source. The driving force of the motor 25 can be transmitted to the rotating brush 2 by a known drive transmission member such as a gear, but the description and illustration thereof will be omitted here.

[0017] The rubbing member 3 rubs against the brush portion 22 when the rotating brush 2 rotates. The rubbing member 3 is disposed upstream of the opening 82 in the rotation direction of the rotating brush 2. In other words, the rubbing member 3 is upstream of the position where the rotating brush 2 and the floor surface 9 come into contact and rub against each other in the rotation direction of the rotating brush 2.

[0018] The blade 51 is a removal member that scrapes off dust adhering to the brush portion 22 by contacting the brush portion 22. The blade 51 is disposed downstream in the rotation direction of the rotating brush 2 from the position where the rotating brush 2 and the floor surface 9 contact and rub against each other. In other words, the blade 51 is disposed downstream of the opening 82 and upstream of the rubbing member 3 in the rotation direction of the rotating brush 2.

[0019] The dust container 6 contains the dust 10 scraped off from the rotating brush 2 by the blade 51. The dust container 6 is detachable from the cleaning device 1, and a user can remove the dust container 6 from the cleaning device 1, dispose of the collected dust 10, and then attach the empty dust container 6 to the cleaning device 1.

[0020] Wheels 71 and 72 are provided on frame 8 and support cleaning device 1 so that cleaning device 1 can move smoothly over floor surface 9, and keep the intrusion amount of rotating brush 2 into floor surface 9 constant.

[0021] (Brush composition) The material of the brush part 22 is polyethylene terephthalate (hereinafter referred to as PET), with a pile fineness of 10D, a pile length of 5mm, and a density of 30kF / inch. 2 The rotating brush 2 had an outer diameter of 30 mm and an axial rotation speed of 50 rpm. By configuring the brush part 22 in this way, the rotating brush 2 can electrostatically attract dust on the floor surface 9. Furthermore, relatively large pieces of dust on the floor surface 9 can be physically flicked off and collected in the dust container 6 by the rotational force of the brush part 22.

[0022] (Blade configuration) Elastic polyurethane resin was used as the material for the blade 51. The blade 51 was fixed to a blade support metal plate 52 so that the blade 51 abutted against the rotating brush 2 with a pressure sufficient to scrape off dust adhering to the surface of the rotating brush 2. The blade support metal plate 52 was fixed to a frame or the like that constitutes the main body of the cleaning device 1.

[0023] (Configuration of the sliding member) The rubbing member 3 has a pile fineness of 10D, a pile length of 3mm, and a density of 50kF / inch. 2 This increases the chance of contact with the rotating brush 2, thereby increasing the amount of charge. The shape of the rubbing member 3 is not limited to a brush shape, and various shapes such as a plate shape or a roller shape are possible.

[0024] (Materials for each component) In the triboelectric series, the material of the rubbing member 3 and the dust to be captured by the cleaning device 1 are on the same side with respect to the material of the brush portion 22. Moreover, in the first embodiment, the material of the brush portion 22 is on the negative side of the triboelectric series relative to the dust. Moreover, the work function of the material of the rubbing member 3 is smaller than the work function of the material of the brush portion 22. The above relationship can be summarized as follows. Triboelectric series (Negative side) Brush part 22 < Dust < Rubbing member 3 (Positive side) Or, (Negative side) Brush part 22<Rubbing member 3<Dust (Positive side) Work function Rubbing member 3 < brush part 22

[0025] Here, it is assumed that the cleaning device 1 is used to clean the interior of a typical household. Dust that is generated in daily life and falls onto the floor surface 9 may include fibers such as linen, cotton, silk, rayon, nylon, and wool, as well as wood, human skin, human hair, and fur. Many of these naturally occurring materials are on the positive side of the triboelectric series from near zero. Therefore, it is assumed that the dust to be captured by the cleaning device 1 of the first embodiment is a material that is positively charged from near zero in the triboelectric series.

[0026] As described above, in the triboelectric series, the brush part 22 is made of a material on the negative side, and the rubbing member 3 is made of a material on the positive side. Therefore, the brush part 22 is negatively charged by the rubbing between the rubbing member 3 and the brush part 22. Since the brush part 22 faces the floor surface 9 from the opening 82 in a negatively charged state, the brush part 22 attracts the positively charged dust present on the floor surface 9 even if the brush part 22 does not rub against the floor surface 9 or the dust. Therefore, the brush part 22 can capture the dust that does not sufficiently rub against the brush part 22 due to the shape of the floor surface 9 or the like. In the first embodiment, when the cleaning device 1 moves over the floor surface 9, the brush part 22 is configured to protrude from the opening 82 to such an extent that the brush part 22 and the floor surface 9 rub against each other, so that the brush part 22 rubs against the floor surface 9 and the dust thereon as the cleaning device 1 moves. When the dust on the floor surface 9 rubs against the brush part 22, the dust becomes positively charged. Therefore, the charge polarity of the brush portion 22, which is negatively charged due to rubbing against the rubbing member 3, is reversed from that of the dust, so that the dust on the floor surface 9 can be electrostatically attracted to the brush portion 22 efficiently.

[0027] The material of the brush part 22 is preferably capable of electrostatically attracting dust on the floor surface 9, and is also preferably durable and wear-resistant. Suitable materials that satisfy the above-mentioned triboelectric series conditions include polyester, acrylic, polypropylene, PET, polyurethane, etc. In the first embodiment, PET was used as the material of the brush part 22.

[0028] The material of the rubbing member 3 is preferably a material that can negatively charge the brush portion 22 by rubbing against the brush portion 22. Suitable materials that satisfy the above-mentioned conditions of the triboelectric series and work function include glass, wool, nylon, rayon, etc. In Example 1, nylon was used as the material of the rubbing member 3.

[0029] Most dust on the floor surface 9 is on the positive side of the triboelectric series. Therefore, by negatively charging the brush portion 22 by the rubbing member 3, even if the brush portion 22 and the dust do not rub against each other due to unevenness of the floor surface 9, an electrostatic attraction force acts between the brush portion 22 and the dust, and the dust on the floor surface 9 can be efficiently collected. In addition, since the work function of the material of the rubbing member 3 is smaller than the work function of the material of the brush portion 22, the brush portion 22 can be efficiently charged to the negative polarity by the rubbing between the rubbing member 3 and the brush portion 22.

[0030] (Method of determining triboelectric series) The method for measuring the triboelectric series is explained below. Whether two given members are on the positive or negative side of the triboelectric series can be determined by judging whether the charge polarity of the surfaces of the two members is positive or negative when the two members are rubbed against each other.

[0031] For example, a method for determining the relationship between the triboelectric series of the brush part 22 made of PET and the material of the rubbing member 3 made of nylon will be described. The brush part 22 and the rubbing member 3 were brought into contact with each other at a pressure of 200 gf and rubbed back and forth 10 times with a moving distance of 5 cm. Then, a Trek surface potential meter (Model 542A-1) was used to measure the surface potential of each of the brush part 22 and the rubbing member 3. The surface potential of the brush part 22 was -3200 V, and the surface potential of the rubbing member 3 was +2800 V. Therefore, it can be determined that in terms of the triboelectric series relationship, the PET of the brush part 22 is on the negative side, and the nylon of the rubbing member 3 is on the positive side.

[0032] (Verification of effectiveness) Next, the dust collection performance was evaluated for Example 1 and Comparative Example 1. Comparative Example 1 differs from Example 1 in that the material of the rubbing member 3 was changed from nylon to perfluoroalkoxy fluorine resin (PFA). Therefore, the triboelectric series relationship of the rubbing member 3, brush part 22, and dust in Comparative Example 1 is as follows: Triboelectric series (Negative side) Rubbing member 3 < Brush part 22 < Dust (Positive side)

[0033] When evaluating dust collection, wheat flour (flour weak wheat flour) manufactured by Nissin Foods Inc. was used as the dust, and a foamed multilayer vinyl floor sheet HS manufactured by Toli Industries Inc. was used as the floor surface 9. A thin layer of wheat flour was spread on the floor surface 9 using a tea strainer, and the collection rate was calculated by measuring the weight (A) of the spread wheat flour and the weight (B) of the wheat flour remaining on the floor surface 9 after the cleaning device 1 scanned the floor surface 9 on which the wheat flour was spread. The collection rate was defined as follows: Recovery rate (%) = 100 × (1-B / A)

[0034] The results are shown in Table 1. [Table 1]

[0035] The recovery rate of Comparative Example 1 was lower than that of Example 1. The reason for this is presumed to be as follows. In Comparative Example 1, the PFA rubbing member 3 is on the negative side of the PET brush part 22 in the triboelectric series, so that the surface of the brush part 22 becomes positively charged due to friction between the brush part 22 and the rubbing member 3. Since the dust on the floor surface 9 made of wheat flour is positively charged, the dust is electrostatically repelled by the brush part 22, making it difficult for the dust to adhere to the brush part 22, and as a result, it is considered that the recovery rate is reduced.

[0036] Example 2 In the second embodiment, the configuration for removing dust adhering to the rotating brush 2 is different from that of the first embodiment. Other configurations are common to the first embodiment. In the following description, the same reference numerals as in the first embodiment are used for the configurations common to the first embodiment, and the description thereof will be omitted.

[0037] The overall configuration of the cleaning device 1 of the second embodiment will be described with reference to FIG. 3. FIG. 3 is a schematic diagram showing a cross section of the cleaning device 1 according to the second embodiment. The collection roller 41 is a collection member that comes into contact with the brush portion 22 downstream of the opening 82 and upstream of the rubbing member 3 in the rotation direction of the rotating brush 2, and collects dust adhering to the brush portion 22. The collection roller 41 is a rotating body rotatably supported by the frame 8. The collection roller 41 rotates in the direction of the arrow S by the driving force of the motor 25. The rotation direction S of the collection roller 41 is counterclockwise in a cross section perpendicular to the shaft portion 21 of the rotating brush 2 as shown in FIG. 3 and with the left side of the drawing being the front. The driving force of the motor 25 is also transmitted to the rotating brush 2 as in the first embodiment. The collection roller 41 is provided with a blade 5. 1 comes into contact with the collection roller 41 and scrapes off dust adhering to the surface of the collection roller 41. The dust scraped off from the surface of the collection roller 41 by the blade 51 is stored in the dust container 6. The dust on the floor surface 9 is captured by the brush portion 22, and then collected from the brush portion 22 by the collection roller 41, and scraped off by the blade 51, and finally the collected dust 10 accumulates in the dust container 6.

[0038] (Collection roller configuration) The recovery roller 41 is configured by covering a core metal with a surface layer member 42, and the core metal may be made of iron, aluminum, SUS, or the like. The surface layer member 42 is covered with perfluoroalkoxy fluororesin (hereinafter PFA) to a thickness of 300 μm. The reason for selecting the material will be described later. The outer diameter of the recovery roller 41 is 24 mm, and the shaft rotation speed is 50 rpm.

[0039] In the second embodiment, the material of the surface layer member 42 of the collection roller 41 and the dust are on the opposite side of the triboelectric series to the material of the brush portion 22. As in the first embodiment, the material of the brush portion 22 is on the negative side of the dust, and the material of the rubbing member 3 and the dust are on the same side of the material of the brush portion 22. The work function of the material of the surface layer member 42 of the collection roller 41 is greater than the work function of the material of the brush portion 22. The above relationships can be summarized as follows. Triboelectric series (Negative side) Surface member 42<Brush portion 22<Dust<Rubbing member 3 (Positive side) Or, (Negative side) Surface member 42<Brush portion 22<Rubbing member 3<Dust (Positive side) Work function Rubbing member 3<brush portion 22<surface layer member 42

[0040] (Surface material) The surface layer member 42 is made of a material that is negatively charged by rubbing against the brush portion 22. That is, the surface layer member 42 is made of a material that is more negative than the material of the brush portion 22 in the triboelectric series. Since the blade 51 is brought into contact with the surface layer member 42, the material of the surface layer member 42 is preferably abrasion resistant and slippery. As such a material that satisfies the above-mentioned conditions of the triboelectric series, fluorinated resins such as polytetrafluoroethylene (PTFE), silicon, polytetrafluorotrifluoroethylene (PCTFE, CTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), PFA, tetrafluoroethylene-hexafluoropolypropylene copolymer (FEP), ethylene-tetrafluoroethylene copolymer (ETFE), and ethylene-tetrafluorotrifluoroethylene copolymer (ECTFE) are preferable. In Example 2, PFA was used as the material of the surface layer member 42.

[0041] This allows the positively charged dust adhering to the brush portion 22 to be electrostatically attracted to the collection roller 41 .

[0042] (Blade configuration) The material of the blade 51 is an elastic polyurethane resin, and it is fixed to the blade support metal plate 52 so as to have a desired contact pressure. This makes it possible to scrape off dust adhering to the surface of the collection roller 41, while suppressing wear due to contact with the surface layer member 42 and also suppressing damage to the surface layer member 42.

[0043] (Verification of effectiveness) Next, for Example 2 and Comparative Examples 2 to 4, the dust collection ability was evaluated in the same manner as in Example 1.

[0044] In Comparative Example 2, the material of the rubbing member 3 in Example 2 was changed from nylon to PFA, and an evaluation was performed. Next, in Comparative Example 3, the material of the rubbing member 3 in Example 2 was changed from nylon to PFA, and Furthermore, evaluation was performed by eliminating the surface layer member 42 and changing the material of the core metal of the recovery roller 41 to be SUS, which is the material of the core metal of the recovery roller 41, and contacting the brush portion 22. In Comparative Example 4, evaluation was performed by eliminating the surface layer member 42 and changing the material of the core metal of the recovery roller 41 to be SUS, which is the material of the core metal of the recovery roller 41, and contacting the brush portion 22.

[0045] The results are shown in Table 2. [Table 2]

[0046] The recovery rates in Comparative Examples 2 to 4 were lower than in Example 2. The reason is presumed to be as follows. In Comparative Example 2, the rubbing member 3 was changed to PFA, which is on the negative side of the electrostatic charge series relative to the material of the brush part 22, and the surface of the brush part 22 was positively charged due to the rubbing between the brush part 22 and the rubbing member 3. Since most dust on the floor surface 9 is positively charged, dust that is not in contact with the brush part 22 and rubbed by it is less likely to be electrostatically adsorbed to the positively charged brush part 22. It is therefore considered that the recovery rate in Comparative Example 2 was lower than that in Example 2.

[0047] In Comparative Example 3, the surface layer member 42 is eliminated from the configuration of Comparative Example 2, and the SUS, which is the material of the core metal of the collection roller 41, is brought into contact with the brush portion 22. Since the SUS is on the positive side of the charge series with respect to the PET, which is the material of the brush portion 22, the brush portion 22 is negatively charged by the friction between the brush portion 22 and the collection roller 41. Therefore, the dust on the brush portion 22, which is positively charged, tends to remain on the brush portion 22, which is negatively charged. Therefore, when the dust on the brush portion 22 comes into contact with the collection roller 41, it is difficult for it to move to the collection roller 41. When the amount of dust on the floor surface 9 that is attracted to the brush portion 22 by the rotation of the rotating brush 2 decreases and moves to the collection roller 41, the amount of dust that adheres to the brush portion 22 increases. In such a state, in the process of collecting dust on the floor surface 9 to the brush portion 22, the dust on the brush portion 22 hinders the collection of the dust on the floor surface 9, and as a result, the collection performance is reduced. It is considered that the collection performance of Comparative Example 3 is therefore lower than that of Example 2 and Comparative Example 2.

[0048] In Comparative Example 4, the material of the rubbing member 3 was the same as that of Example 2, but the surface member 42 was changed to SUS. As a result, as described above, it became more difficult for dust on the brush portion 22 to move to the surface member 42, and as a result, it is believed that the recovery rate was lower than that of Example 2.

[0049] (Modification) Various modifications are possible to the above embodiment. For example, as shown in FIG. 4, a contacted portion 81 that the brush portion 22 contacts may be provided on a part of the frame 8 of the cleaning device 1, and the material of the contacted portion 81 may be a material (such as nylon) suitable for the material of the rubbing member 3 in the above embodiment. FIG. 4 is a cross-sectional view of the cleaning device 1 having the contacted portion 81, similar to FIG. 1, and particularly shows the vicinity of the rotating brush 2. In this case, a part of the frame functions as the rubbing member in the above embodiment. The contacted portion 81 is provided upstream of an opening 82 that exposes the rotating brush 2 to the floor surface 9 in the rotation direction of the rotating brush 2 (the direction indicated by the arrow R). This allows the brush portion 22 to be negatively charged by the rubbing between the contacted portion 81 and the brush portion 22.

[0050] Also, as shown in Fig. 5, the configuration of the cleaning device 1 of the above embodiment may be used in a head unit 101 of a known suction type vacuum cleaner 100. Fig. 5 is a perspective view showing a schematic configuration of the suction type vacuum cleaner 100. According to this suction type vacuum cleaner 1000, dust on the floor surface can be removed by utilizing an air flow, and dust adhering to the brush unit 22 can also be removed. This improves the ability to remove dust on the floor.

[0051] Also, as shown in Fig. 6, instead of the rotating brush 2, a configuration may be adopted in which a brush belt 20 is provided with a brush portion 22 on the surface of an endless belt 23 rotatably stretched around tension rollers 73 and 74. Fig. 6 is a diagram showing a cross section similar to Fig. 1 of a cleaning device 1 having a brush belt 20. In this configuration, the brush portion 22 rotates integrally with the belt 23. The brush belt 20 can be configured to rotate by the driving force of a motor 25, as in the first embodiment and the like.

[0052] Furthermore, the rotational drive of the rotating brush 2, the collection roller 41, and the brush belt 20 is not limited to a configuration in which it is performed by the motor 25. For example, as shown in Fig. 7, when the cleaning device 1 moves, the rotating force of the wheels 71 or 72 may be transmitted to the rotating brush 2 using a transmission member 24 such as a gear, thereby rotating the rotating brush 2. Fig. 7 is a diagram showing a cross section similar to Fig. 1 of the cleaning device 1 having such a transmission member 24. The collection roller 41 and the brush belt 20 may also be rotated by transmitting the rotating force of the wheels 71 or 72 in a similar manner.

[0053] Also, as shown in FIG. 8, the sliding contact member may be composed of a rotating body 30 rotatably supported on a frame constituting the device main body of the cleaning device 1. The material constituting the surface layer of the rotating body 30 may be selected so as to satisfy the conditions of the material constituting the sliding member 3 described above. Also, a second brush part 31 that contacts the brush part 22 (first brush part) of the rotating brush 2 may be provided on the outer circumferential surface of the rotating body 30, and the material of the second brush part 31 may be a material that satisfies the same conditions as the material constituting the sliding member 3 described above. Similarly, a brush that can slide against the brush part 22 of the rotating brush 2 may be provided on the surface of the sliding member 3 of the embodiment 1 shown in FIG. 1, and the material of the brush may be a material that satisfies the same conditions as the material constituting the sliding member 3 described above.

[0054] The disclosure of this embodiment includes the following configuration. (Configuration 1) A cleaning device that captures dust on a surface to be cleaned by electrostatic charges, A frame body, A rotating brush rotatably supported by the frame and provided with a brush portion; A driving means for rotating the rotary brush; an opening for exposing a portion of the brush unit to the outside of the frame; a rubbing member that rubs against the brush portion when the rotating brush rotates, thereby charging the brush portion to a negative polarity; A cleaning device having: (Configuration 2) 2. The cleaning device according to claim 1, wherein the material constituting the rubbing member is on the more positive side of the triboelectric series than the material constituting the brush portion. (Configuration 3) 3. The cleaning device according to claim 1 or 2, wherein the work function of the material constituting the rubbing member is smaller than the work function of the material constituting the brush portion. (Configuration 4) The cleaning device according to configuration 1 or 2, wherein the rubbing member is located upstream of the opening in a rotation direction of the rotating brush. (Configuration 5) The cleaning device according to configuration 1 or 2, wherein a portion of the brush part exposed through the opening is configured to slide against the surface to be cleaned when the cleaning device moves over the surface to be cleaned. (Configuration 6) The rotating brush has a shaft portion rotatably supported by the frame body, The cleaning device according to configuration 1 or 2, wherein the brush portion is attached to the shaft portion and rotates integrally with the shaft portion. (Configuration 7) The rotating brush has an endless belt that is rotatably stretched, The cleaning device according to configuration 1 or 2, wherein the brush portion is attached to the belt and rotates integrally with the belt. (Configuration 8) The brush portion of the rotating brush is a first brush portion, The cleaning device according to configuration 1 or 2, wherein the rubbing member has a second brush portion that contacts the first brush portion. (Configuration 9) 3. The cleaning device according to configuration 1 or 2, wherein the rubbing member is a rotating body rotatably supported on the frame. (Configuration 10) 3. The cleaning device according to claim 1 or 2, wherein the rubbing member is a part of the frame. (Configuration 11) 3. The cleaning device according to claim 1 or 2, wherein the driving means is a motor. (Configuration 12) the cleaning device has wheels that are provided on the frame and support the cleaning device in use so that the cleaning device can be moved over the surface to be cleaned; 3. The cleaning device according to claim 1, wherein the driving means has a transmission member that transmits rotation of the wheel to the rotating brush, thereby rotating the rotating brush. (Configuration 13) a removing member that comes into contact with the brush portion downstream of the opening and upstream of the rubbing member in the rotation direction of the rotating brush to scrape off dust attached to the brush portion; a container for storing dust scraped off from the brush portion by the removing member; 3. The cleaning device according to claim 1 or 2, (Configuration 14) a collecting member that contacts the brush portion downstream of the opening and upstream of the rubbing member in the rotation direction of the rotating brush and collects dust adhering to the brush portion; 3. The cleaning device according to claim 1, wherein the material constituting the collection member is on the more negative side of the triboelectric series than the material constituting the brush portion. (Configuration 15) 15. The cleaning device according to claim 14, wherein the work function of the material constituting the recovery member is greater than the work function of the material constituting the brush portion. (Configuration 16) The recovery member is a rotating body rotatably supported on the frame body, The cleaning device includes: a removal member that comes into contact with a surface of the collection member to scrape off dust adhering to the surface of the collection member; a container for storing the dust scraped off from the collection member by the removal member; 15. The cleaning device according to claim 14, comprising: (Configuration 17) The cleaning device according to configuration 1 or 2, wherein the cleaning device is a head part of a suction type vacuum cleaner. (Configuration 18) A cleaning device that captures dust on a surface to be cleaned by electrostatic charges, A frame body, A rotating brush rotatably supported by the frame and provided with a brush portion; A driving means for rotating the rotary brush; an opening for exposing a portion of the brush unit to the outside of the frame; a rubbing member that rubs against the brush portion when the rotating brush rotates; having 11. A cleaning device according to claim 10, wherein the material of said rubbing member and the dust to be captured by said cleaning device are on the same side of the material constituting said brush portion in a triboelectric series. [Explanation of symbols]

[0055] 1: cleaning device, 2: rotating brush, 22: brush part, 25: motor, 3: rubbing member, 8: frame, 82: opening, 9: floor surface

Claims

1. A cleaning device that captures dust on a surface to be cleaned using static electricity, A frame body, a rotating brush rotatably supported by the frame and provided with a brush portion; a driving means for rotating the rotary brush; a rubbing member that rubs against the brush portion when the rotary brush rotates, thereby charging the brush portion to a negative polarity; and A cleaning device characterized in that a part of the brush unit is exposed to the outside of the frame through an opening provided in the frame.

2. 2. The cleaning device according to claim 1, wherein the material constituting the rubbing member is on the positive side of the triboelectric series relative to the material constituting the brush portion.

3. 3. The cleaning device according to claim 1, wherein the work function of the material forming the rubbing member is smaller than the work function of the material forming the brush portion.

4. 3. The cleaning device according to claim 1, wherein the rubbing member is located upstream of the opening in the rotation direction of the rotary brush.

5. 3. The cleaning device according to claim 1, wherein the portion of the brush part exposed through the opening is configured to slide against the surface to be cleaned when the cleaning device moves over the surface to be cleaned.

6. The rotary brush has a shaft portion rotatably supported by the frame body, 3. The cleaning device according to claim 1, wherein the brush unit is attached to the shaft unit and rotates integrally with the shaft unit.

7. The rotary brush has an endless belt that is rotatably stretched, The brush unit is attached to the belt and rotates integrally with the belt.

3. The cleaning device according to claim 1 or 2,

8. The brush portion of the rotary brush is a first brush portion, 3. The cleaning device according to claim 1, wherein the rubbing member has a second brush portion that contacts the first brush portion.

9. 3. The cleaning device according to claim 1, wherein the rubbing member is a rotating body rotatably supported on the frame body.

10. 3. The cleaning device according to claim 1, wherein the rubbing member is a part of the frame.

11. 3. The cleaning device according to claim 1, wherein the driving means is a motor.

12. the cleaning device has wheels that are provided on the frame and that support the cleaning device so that it can move over the surface to be cleaned during use; 3. The cleaning device according to claim 1, wherein the driving means includes a transmission member for transmitting the rotation of the wheel to the rotary brush, thereby rotating the rotary brush.

13. a removing member that comes into contact with the brush portion downstream of the opening and upstream of the rubbing member in the rotation direction of the rotary brush to scrape off dust adhering to the brush portion; a container for collecting dust scraped off from the brush portion by the removing member; 3. The cleaning device according to claim 1, further comprising:

14. a collecting member that contacts the brush portion downstream of the opening and upstream of the rubbing member in the rotation direction of the rotary brush, and collects dust adhering to the brush portion; 3. The cleaning device according to claim 1, wherein the material constituting the collection member is on the more negative side of the triboelectric series than the material constituting the brush portion.

15. 15. The cleaning device according to claim 14, wherein the work function of the material that forms the collection member is greater than the work function of the material that forms the brush portion.

16. the recovery member is a rotating body rotatably supported by the frame body, The cleaning device is a removal member that comes into contact with the surface of the collection member to scrape off dust adhering to the surface of the collection member; a container for collecting the dust scraped off from the collecting member by the removing member; 15. The cleaning device of claim 14, further comprising:

17. 3. The cleaning device according to claim 1, wherein the cleaning device is a head of a suction type vacuum cleaner.

18. A cleaning device that captures dust on a surface to be cleaned using static electricity, A frame body, a rotating brush rotatably supported by the frame and provided with a brush portion; a driving means for rotating the rotary brush; a rubbing member that rubs against the brush portion when the rotary brush rotates; and In the triboelectric series, the material of the rubbing member and the dust to be captured by the cleaning device are on the same side with respect to the material constituting the brush portion, A cleaning device characterized in that a part of the brush unit is exposed to the outside of the frame through an opening provided in the frame.

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