Rotating roller brush for surface cleaning equipment and autonomous surface cleaning equipment

Abstract

Rotating roller brush for surface cleaning equipment, wherein the rotatable roller brush comprises a roller body and a bristle belt, characterized in that the bristle belt is mounted on the roller body and extends along the main area and the end area of ​​the roller body, including the bristle belt, a first bristle belt, wherein the first bristle belt extends in one direction at a first angle to the longitudinal axis of the agitator, a second bristle belt extending at a second angle relative to the longitudinal axis of the rotatable roller brush, the second angle being smaller than the first angle, the first bristle belt and the second bristle belt forming an opening at their adjacent positions.

Description

TECHNICAL AREA

[0001] The present utility model relates to a rotatable roller brush surface cleaning device and an autonomous surface cleaning device. STATE OF THE ART

[0002] The autonomous surface cleaning unit of a self-driving cleaning robot includes a rotating roller brush. The rotating roller brush serves to improve the cleaning performance of the surface cleaning unit. The rotating roller brush comprises a roller body. One end of the roller body is fixed within the roller brush housing, while the other end is attached to the drive unit. The rotating roller brush can rotate around a longitudinal axis within the roller brush housing under the drive of the drive unit. The roller body has several bristle strips. Each bristle strip comprises numerous bristles arranged side by side. The multiple bristles extend perpendicularly from the roller body.Each bristle belt is attached in a V-shape or a spiral configuration within a track defined by the roller body, allowing for a relatively dense and uniform bristle attachment to pick up particles or stains from the surfaces to be cleaned.

[0003] During the passage of stirred-up dust through the dirty air inlet, hair can become entangled in the roller brush or its mounting components. This can lead to increased torque output from the motor, and a significant accumulation of tangled material on the roller brush can cause bristle failure and reduced cleaning performance. Typically, the roller brush can be removed from the brush chamber to clear the tangled material. However, disassembling the roller brush to remove tangled material is a cumbersome process. CONTENTS OF THE PRESENT SAMPLE FOR USE

[0004] The present utility model relates to a rotatable roller brush for surface cleaning equipment and an autonomous surface cleaning device.

[0005] According to one aspect of the present utility model, a rotatable roller brush for surface cleaning equipment is provided. The roller brush comprises a roller body with an axle and a bristle belt, the bristle belt being mounted on the roller body and extending along the main and end regions of the roller body. The bristle belt comprises: a first bristle belt extending along a first angle relative to the longitudinal axis of the roller, and a second bristle belt extending along a second angle relative to the longitudinal axis of the roller brush, the second angle being smaller than the first angle, with the first and second bristle belts forming an opening at their adjacent positions.

[0006] According to one embodiment of the present utility model, the first angle is a right angle and the second angle is not a right angle.

[0007] According to one embodiment of the present utility model, the first bristle belt borders directly on the second bristle belt.

[0008] According to one embodiment of the present utility model, the first bristle belt and the second bristle belt are aligned side by side.

[0009] According to one embodiment of the present utility model, the end region is offset from the center of the roller body.

[0010] According to one embodiment of the present utility model, the bristle belts are received in a path defined by the roller brush, the path being defined as a passage extending along the roller body.

[0011] According to one embodiment of the present utility model, the first bristle belt and the second bristle belt have a constant longitudinal height that extends beyond the mixing body.

[0012] According to one embodiment of the present utility model, lamellae spaced apart from the bristle belt are provided, wherein both the lamellae and the bristle belt are rotatable about the axis of the roller body.

[0013] According to one embodiment of the present utility model, the lamellae are received in a lamella defined by the roller brush, wherein the lamellae are defined as a path extending along the roller body.

[0014] According to one embodiment of the present utility model, the lamellae are provided with recesses that border the openings on the roller body in the circumferential direction.

[0015] According to a further aspect of the present utility model, an autonomous surface cleaning device is provided, comprising: a main body, a side brush assembly located at the front of the main body, a cleaning head unit located at the bottom of the main body, the end region of the cleaning head unit adjoining the side brush assembly, the cleaning head unit comprising: a rotatable roller brush, the roller brush comprising a roller body with an axle and a bristle belt, the bristle belt being mounted on the roller body and extending along the main region and the end region of the roller body, the bristle belt comprising: a first bristle belt extending at a first angle relative to the longitudinal axis of the agitator, a second bristle belt extending at a second angle relative to the longitudinal axis of the roller brush,where the second angle is smaller than the first angle, the first and second bristle belts form an opening at their adjacent positions, and when the autonomous surface cleaning device is in operation, the first bristle belt touches at least part of the side brush unit.

[0016] According to one embodiment of the present utility model, the side brush unit comprises a side brush body that can rotate about an axis and at least one bristle extending outwards from the side brush body. The side brush body drives the bristle to rotate and forms a swept area that crosses the first bristle strip.

[0017] According to one embodiment of the present utility model, the first bristle belt borders directly on the second bristle belt.

[0018] According to one embodiment of the present utility model, lamellae are provided which are spaced apart in the circumferential direction from the bristle straps.

[0019] According to one embodiment of the present utility model, the lamellae are provided with recesses adjacent to the openings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings illustrate exemplary embodiments of the present utility model and, together with their descriptions, serve to explain the principles of the present utility model. These drawings are included to facilitate a better understanding of the present utility model and form part of this description. Fig. Figure 1 shows a schematic representation of a rotatable roller brush according to one aspect of the present utility model. Fig. Figure 2 shows a schematic representation of the rotatable roller brush according to an aspect of the present utility model from a different perspective, showing vertical and inclined bristle straps. Fig. Figure 3 shows a schematic representation of the rotatable roller brush according to one aspect of the present utility model from a different perspective. Fig. Figure 4 shows a schematic side view of the rotatable roller brush according to one aspect of the present utility model. Fig. Figure 5 is a schematic representation of the chassis of an autonomous surface cleaning device according to one aspect of the present utility model. Fig. Figure 6 shows a schematic representation of the rotatable roller brush according to one aspect of the present utility model from a different perspective, showing the recess. DETAILED DESCRIPTION

[0021] The present utility model is explained in more detail below with reference to the accompanying drawings and embodiments. It should be noted that the specific embodiments described here serve only to illustrate the relevant content and do not constitute any limitations to the scope of the present utility model. It should also be noted that, for the sake of clarity, the drawings only show parts that are relevant to the present utility model.

[0022] It should be noted that, where compatible, embodiments of the present utility model and features within embodiments may be combined. The technical solutions of the present utility model are now described in detail with reference to the accompanying drawings and in conjunction with embodiments.

[0023] Unless otherwise stated, the exemplary embodiments / examples shown are to be understood as illustrations of exemplary features of various details that offer possibilities for the practical implementation of the technical concept of the present utility model. Unless otherwise stated, the features of different embodiments / examples can therefore be additionally combined, separated, exchanged and / or rearranged without deviating from the technical concept of the present utility model.

[0024] The hatching and / or shading used in the drawings generally serves to clarify the boundaries between adjacent components. Unless otherwise specified, the presence or absence of hatching or shading therefore does not convey or indicate any preference or requirement regarding the specific material, material properties, dimensions, proportions, commonalities between the components shown, and / or other features, characteristics, or properties of the components. Furthermore, for the sake of clarity and / or description, the dimensions and relative dimensions of the components may be exaggerated in the drawings. Where exemplary embodiments can be implemented differently, certain process steps may be carried out in a different sequence than described.For example, two processes described sequentially can be carried out essentially simultaneously or in reverse order. Furthermore, identical reference symbols denote identical components.

[0025] When a component is described as being "on" or "above" another component, or as being "connected to" or "coupled with" another component, that component may be directly on top of, directly connected to, or directly coupled with the other component, or there may be intermediate components. However, when a component is described as being "directly on," "directly with," or "directly coupled with" another component, there are no intermediate components. For this purpose, the term "connection" can refer to physical connections, electrical connections, etc., with or without intermediate components.

[0026] For descriptive purposes, this utility model may use spatial relative terms such as "below," "under," "in the way," "below," "above," "on," "over," "higher," and "side" (e.g., as in "side wall") to describe the relationship between one component and another component, as shown in the drawings. Beyond the orientations shown in the drawings, spatial relative terms are intended to encompass various orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings were reversed, a component described as "below" or "under" another component or feature would subsequently be positioned "above" that other component or feature. Thus, the exemplary term "below" can encompass both the "above" and "below" orientations.Furthermore, the device can be positioned alternatively (e.g. rotated by 90 degrees or in other orientations), with the corresponding spatial relative descriptions used here being interpreted accordingly.

[0027] The terminology used herein serves to describe specific embodiments and is not intended to be restrictive. Unless the context clearly indicates otherwise, singular forms such as "a" and "the" are intended to include plural forms. When the terms "comprehensive" and / or "inclusive" and their variants are used herein, they indicate the presence of the specified features, units, steps, operations, parts, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, units, steps, operations, parts, components, and / or groups thereof. It should also be noted that the terms "essentially," "approximately," and other similar expressions as used herein are used as approximations rather than degrees of certainty.They are therefore used to account for inherent deviations in the stated measurements, calculations and / or values ​​that are known to experts.

[0028] While vacuuming dirt from floors or carpets, the roller brush of surface cleaning machines can easily become entangled with thin objects such as fine strings or hair. If such entanglements remain on the roller brush for an extended period, this leads to a reduced cleaning effect of the roller brush and simultaneously increases the likelihood of damage to the roller brush's drive motor.

[0029] In the present utility model application, the bristle belt on the roller brush comprises a first section extending vertically to the roller body and a second section extending at an angle to the roller body. An opening is formed between the first and second sections. Under the action of Archimedes' screw force, elongated, tangled objects move towards this opening and detach at the opening, ultimately being drawn into the suction opening. Near the side brush unit of the surface cleaning device, the first bristles of the roller brush in the first section are vertically oriented. This facilitates the winding and suction of hair from the side brush unit into the suction opening, thereby improving cleaning performance at the edges.

[0030] As in Fig. As shown in Figure 1, the roller brush 10 comprises a roller body 12. The roller body 12 is elongated and has an axle. The roller body 12 is provided with a strip that carries several bristles. This strip is referred to below as the bristle belt 14. The bristle belt 14 extends along the outer surface of the roller body 12. Its extension configuration is helical or V-shaped. In a specific example, the roller body 12 is provided with two such bristle belts 14. The two bristle belts 14 are spaced apart from each other at an angle of 180° around the circumference of the roller body 12. It is understood that the roller brush 10 can be configured with more or fewer bristle belts as required. Furthermore, a uniform spacing is not strictly necessary. If desired, the bristle belts 14 can be arranged unevenly around the outer surface of the roller body 10.

[0031] Each bristle strip 14 is housed and held in a corresponding path 16 defined by the roller body 12. In one embodiment of the present utility model, two such paths 16 are provided. Each path 16 corresponds to one bristle strip 14. Each path 16 extends from one end of the roller brush to the other. In one example, the roller brush is made of a polymer material.

[0032] Each bristle belt comprises several bristles 18 arranged side by side. These multiple bristles 18 are arranged in a continuous longitudinal configuration and form the primary stirring part of the roller brush. Within the bristle belt 14, a portion of the bristle 18 extends perpendicularly from the roller body 12. In practice, however, slight deviations from the vertical direction may occur. The bristle belt 14 is fixed in a corresponding channel 16. Each channel 16 is formed by a longitudinally extending channel. The channel 16 is defined within the outer surface of the roller brush 10.

[0033] From the Fig. 1 and Fig. As can be seen in Figure 2, a portion of the bristle belt is inclined towards the end along the longitudinal axis L of the roller brush. In other words, the ends of the bristle belt 14 have extensions inclined towards the ends. This improves the tangling resistance of the roller brush 10 of the present utility model. An exemplary configuration of the roller brush that achieves this effect will now be described in more detail.

[0034] With reference to Fig. 1. The roller body 12 can comprise a middle region 20 and an end region 22. The middle region 20 and the end region 22 of the roller body 12 are defined by their proximity to the end position. The middle and end regions are not strictly separated from each other. It is understood that the middle region is closer to the suction opening than the end region. In other examples, the end region 22 can also be connected to the middle region as a separate component.

[0035] As in the Fig. 1 and Fig. As shown in Figure 5, the end region 22 is located near the mounting end of the roller brush inside the roller brush chamber. In an alternative example, the end region 22 is located near the mounting side of the side brush unit 64 of the surface cleaning device.

[0036] As in Fig. As shown in Figure 3, the end section 22 comprises a lamellar section 16b. The lamellar section 16b is aligned with the lamellar section 16a of the central section 20 of the roller body 12. This creates a continuous path 16 extending from one end of the roller brush 10 to the other. In one example, the lamellar section 16a of the central section 20 of the roller body 12 has a V-shaped transition point O. The position of the transition point O is located at a point on the inclined bristle section 14b, which facilitates the pickup and collection of particles from the cleaned surface. However, the V-shape is not strictly necessary. In one example, the traces of the vertical bristle section 14a and the oblique bristle section 14b together form a spiral pattern on the surface of the roller body 12. In contrast, the lamellar section 16b bounded by the end region 22 is essentially linear.The radial distance of the lamellar section 16b from the longitudinal axis L remains essentially constant in order to maintain the sweeping width of the bristle belt of the roller brush.

[0037] As in the Fig. 2 and Fig. As shown in Figure 3, the lamellar sections 16a and 16b comprise two adjacent sections at the junction between the end region 22 and the central region 20. These two adjacent sections correspond to the vertical bristle section 14a and the inclined bristle section 14b of the bristle belt 14, respectively. The vertical bristle section 14a on the roller brush 10 has a vertical angle (an extension angle of approximately 90° relative to the longitudinal axis of the roller brush) to ensure the particle-holding capacity of the end region of the roller brush. The vertical bristle section 14a occupies approximately 20% to 35% of the length along the direction of the axial extension of the roller brush body. At an adjacent position, the vertical bristle section 14a transitions into the inclined bristle section 14b.The inclined bristle section 14b has an angle of inclination (of about 15 to 45 degrees relative to the longitudinal axis of the roller brush) and is inclined towards the vertical bristle section 14a.

[0038] This variation in the angle of inclination directs the free ends of the bristles connected to the inclined section (which extends from the other end region of the roller brush across the central region 20) toward the end region 22. Consequently, the action of the Archimedes screw force during rotation of the roller brush directs hair (e.g., animal hair) from this region toward the adjacent position. In a specific example, the angle of inclination of the inclined bristle section 14b relative to the longitudinal axis of the roller brush is approximately 30 degrees. This results in the bristles forming an angle of approximately 30 degrees relative to the longitudinal axis of the roller brush. Larger angles of inclination are acceptable but would result in bristles with a steeper vertical angle, which would reduce the hair-guiding capacity.

[0039] The end region 22 comprises the oblique bristle section 14b. If the oblique bristle section 14b and the perpendicular bristle section 14a have identical lengths, the angle of inclination of the oblique bristle section 14b causes its free end to be radially closer to the longitudinal axis than that of the perpendicular bristle section 14a. In other words, the overall rotation diameter of the oblique bristle section 14b converges towards the longitudinal axis. As shown in the Fig. As shown, to ensure high cleaning performance of the roller brush, it is desirable to maximize the cleaning amplitude of the agitator. This is achieved by configuring the inclined bristle section 14b to have a greater reach compared to the vertical bristle section 14a. That is, the bristle length of the inclined bristle section 14b is greater than that of the vertical bristle section 14a.

[0040] This ensures that the outer diameter of the bristle of the roller brush remains the same, thus maintaining the uniformity of the rotating outer diameter of the roller brush and guaranteeing a sufficient sweeping amplitude.

[0041] Fig. Figure 2 shows the bristle belt 14 already installed on the roller brush 10. The inclined bristle section 14b of the bristle belt 14 extends from the end region 22' along the middle region 20 to the end region 22. The end region 22 borders the vertical bristle section 14a. The end region 22 and the vertical bristle section 14a form an opening 40 at this point. There is an angular difference between the vertical bristle section 14a and the inclined bristle section 14b, which creates the open opening 40 at the junction. During the rotation of the roller brush, hairs on the inclined bristle section 14b are moved towards the opening 40 by the action of the Archimedes screw force, whereupon the hairs are drawn into the suction opening by the suction force. The vertical bristle section 14a has a shorter longitudinal extent along the axis of rotation.It detaches from opening 40 before the hair becomes tangled, thus ensuring freedom from tangling while maintaining sufficient dirt absorption capacity.

[0042] In an exemplary configuration where the roller brush is mounted on the surface cleaning device, the free end of the vertical bristle section 14a contacts the side brush unit 64 of the surface cleaning device. The vertical bristle section 14a is provided with sufficient extension to allow the collection of hair from the side brush unit 64.

[0043] As in Fig. Figure 5 shows an exemplary self-propelled surface cleaning device 60 comprising a chassis 62 and at least one drive wheel (not shown) mounted thereon for driving the device.

[0044] The roller brush is mounted on the chassis 62 and protrudes from the underside of the chassis 62. When the self-propelled surface cleaning device 60 is driven forward, the roller brush can rotate, thereby collecting dirt and directing it into the suction opening of the self-propelled surface cleaning device 60.

[0045] The self-propelled surface cleaning device 60 comprises a side brush unit 64. The side brush unit 64 is mounted on the chassis 62 near the front lateral position. In certain embodiments, the side brush unit 64 comprises at least one bundle of bristles 66 extending downwards from the side brush housing 65. The side brush housing 65 can form a swept area D around an upwardly extending axis. The swept area D rotates below the chassis 62 and alongside the side of the chassis 62. This movement allows the bristles 66 to pick up particles from the outer surface of the chassis 62 and transport them into the interior of the chassis 62.

[0046] The side brush unit 64 comprises an arm 67 extending from the side brush housing 65 and bristles 66 connected to the free end of the arm 67. The bristles 66 are fibrous and can be made of synthetic or natural fibers. As the side brush body 65 rotates, the bristles 66 collect dirt from hard-to-reach areas around the chassis 62 (e.g., corners and around furniture) and, with further rotation, direct the dirt to the roller brush, where it is drawn into the suction opening.

[0047] In one example, the swept area D of the bristle 66 touches the vertical bristle section 14a of the roller brush. This facilitates the removal of hair from the bristle 66. That is, if the bristle assembly becomes entangled with hair in hard-to-reach areas of the chassis 62 and rotates back towards the roller brush, the rotation of the roller brush allows the ends of the vertical bristle section 14a to remove the hair from the bristles of the side brush unit 64. This hair is then guided directly into the suction opening or through the opening 40 into the suction opening.

[0048] In all the preceding examples, the roller brush has an elongated configuration with a substantially cylindrical outer surface. Of course, the roller brush can also have alternative cross-sectional shapes. In the aforementioned examples, the end section 22 is described as an integral part of the roller brush. However, the end section 22 can alternatively be manufactured as a separately produced part.

[0049] In another example, the roller brush includes additional stirring components. As in Fig.As shown in Figure 6, such additional agitator components can comprise longitudinally extending lamellae 70. These lamellae 70 define a path 71 that surrounds the roller body 12 from end 22' to end 22. The path 71 can be spiral or V-shaped, and the course of one or more rows of bristle belts 14 remains substantially parallel to the path of the lamellae 70 on the outer circumferential surface of the roller body 12. In particular, the bristle belt 14 extends close to the lamellae 70, thus allowing a variable distance between the bristle belts 14 and the adjacent lamellae 70. This arrangement improves cleaning performance and reduces the entanglement of hair and dirt around the roller body 12.

[0050] At positions corresponding to the openings 40 in the bristle strips 14 (i.e., the junctions between the vertical and oblique bristle sections), the lamellae 70 have recessed indentations 72 that face the surface of the roller body 12. When hairs move along the longitudinal axis of the roller brush towards the indentation 72, this facilitates the release of the hairs from the roller brush so that they can subsequently be drawn in by the suction opening.

[0051] The recess 72 corresponds positionally to the opening 40, thus more effectively reducing the tangling force of the hair. The hair remains loose and easily untangled and is drawn in through the suction opening. Alternatively, the hair is drawn in through the recess 72 and opening 40 before it becomes tangled.

[0052] According to the shape of the opening 40, the edge angles formed by the recess 72 on the lamella 70 substantially correspond to the shape of the opening to facilitate hair release. In one example, the recess 72 comprises a first edge 72a adjacent to the perpendicular bristle section 14a and a second edge 72b adjacent to the inclined bristle section 14b. The arrangement of the first edge 72a and the second edge 72b facilitates hair release from the positions of the recess 72 and the opening 40. In one example, the angle of inclination of the second edge 72b is greater than that of the first edge 72a. In another example, the first edge 72a is substantially perpendicular to the longitudinal axis of the roller brush. The second edge 72b forms a gentle inclination along the direction of particle movement, creating a transition line at the second edge 72b.This facilitates the gradual reduction of the size of the entangled hair component as the lamellae move the entangled hairs towards the bottom surface of the recess 72, thus preventing the hairs from being caught and trapped by the second edge 72b.

[0053] In the description of this specification, the terms “one embodiment / mode”, “some embodiments / modes”, “example”, “specific example”, or “some examples” indicate that the specific features, structures, materials, or properties described in connection with that embodiment / mode or example are included in at least one embodiment / mode or example of the present application. In this specification, the illustrative use of the above terms need not necessarily refer to the same embodiment / mode or example. Furthermore, the described specific features, structures, materials, or properties may be combined appropriately in one or more embodiments / modes or examples.Furthermore, provided that this does not contradict each other, experts may combine and integrate various embodiments / methods or examples described herein together with their respective features.

[0054] Furthermore, the terms “first” and “second” are used solely for descriptive purposes and should not be interpreted as indicating or implying any relative significance or as implying the number of technical features specified. Consequently, features designated as “first” or “second” may explicitly or implicitly comprise at least one such feature. Throughout the description of this application, “several” means at least two, such as two, three, etc., unless expressly and specifically stated otherwise.

[0055] Those skilled in the art will recognize that the embodiments mentioned above serve only to clarify the present utility model and not to limit its scope. Based on the above disclosure, those skilled in the art may make other variations or modifications which also fall within the scope of this utility model.

Claims

[1] Rotating roller brush for surface cleaning equipment, wherein the rotating roller brush comprises a roller body and a bristle belt, characterized by , that the bristle belt is mounted on the roller body and extends along the main area and the end area of ​​the roller body, including the bristle belt, a first bristle belt, wherein the first bristle belt extends in one direction at a first angle to the longitudinal axis of the agitator, a second bristle belt extending at a second angle relative to the longitudinal axis of the rotatable roller brush, the second angle being smaller than the first angle, the first bristle belt and the second bristle belt forming an opening at their adjacent positions. [2] Rotating roller brush according to claim 1, characterized by that the first angle is a right angle and the second angle is an acute angle. [3] Rotating roller brush according to claim 1, characterized by , that the first bristle belt is directly adjacent to the second bristle belt. [4] Rotating roller brush according to claim 1, characterized by that the first bristle belt and the second bristle belt are arranged next to each other. [5] Rotating roller brush according to claim 1, characterized by that the end area is offset from the center of the roller body. [6] Rotating roller brush according to claim 1, characterized by that the bristle belt is positioned within a path defined by the roller brush, the path being defined as an extension of the roller body. [7] Rotating roller brush according to claim 1, characterized by that the first bristle belt and the second bristle belt extend outwards from the roller body to a constant length. [8] Rotating roller brush according to claim 1, characterized by, that the rotatable roller brush comprises lamellae spaced apart from the bristle belt, wherein both the lamellae and the bristle belt are rotatable about the axis of the roller body. [9] Rotating roller brush according to claim 8, characterized by that the lamellae are arranged within a raceway defined by the roller brush, the raceway being defined as a path extending along the roller body. [10] Rotating roller brush according to claim 8, characterized by that the lamellae are provided with a recess which is arranged adjacent to the opening in the circumferential direction of the roller body. [11] Autonomous surface cleaning device, characterized by , that it includes: a main body a side brush unit positioned at the front of the main body, a cleaning head unit positioned on the underside of the main body, with the end area of ​​the cleaning head unit adjacent to the side brush unit, wherein the cleaning head unit comprises a rotatable roller brush, wherein the rotatable roller brush comprises a roller body and a bristle belt, wherein the bristle belt is mounted on the roller body and extends along a main area and the end area of ​​the roller body, wherein the bristle belt comprises: a first bristle belt, wherein the first bristle belt extends at a first angle relative to the longitudinal axis of the agitator, a second bristle belt extending at a second angle relative to the longitudinal axis of the roller brush, the second angle being smaller than the first angle, the first bristle belt and the second bristle belt forming an opening at adjacent positions, during the operation of the autonomous surface cleaning device, the first bristle belt touches at least part of the side brush unit. [12] Autonomous surface cleaning device according to claim 11, characterized by , that the side brush unit comprises: a side brush body capable of rotating about its own axis, and at least one bristle extending outwards from the side brush body, the side brush body causing the bristles to rotate and forming a swept area that crosses the first bristle strip. [13] Autonomous surface cleaning device according to claim 11, characterized by , that the first bristle belt is directly adjacent to the second bristle belt. [14] Autonomous surface cleaning device according to claim 11, characterized by , that the rotating roller brush comprises lamellae that are spaced apart in the circumferential direction from the bristle belt. [15] Autonomous surface cleaning device according to claim 14, characterized by that the slats are provided with a recess adjacent to the opening.

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