Sweeping robot capable of switching brushes

Abstract

The sweeping robot comprises a sweeping robot body, and the bottom of the sweeping robot body is provided with a dust suction opening, a side brush mechanism and a power roller mechanism; the side brush mechanism comprises a rotating assembly, and a thin brush set and a thick brush set which are arranged at intervals along the circumference are arranged at the bottom of the side brush mechanism and extend downwards in an inclined mode in the natural state. The rotating assembly is provided with a bottom plate and a movable pressing plate, pressing pieces are arranged on the outer side of the pressing plate, a first notch is formed between the pressing pieces, the brush sets are correspondingly arranged in the first notch, and the pressing pieces can press one brush set on the bottom plate so that the brush set can be separated from the ground. According to the design, the brushes can be switched according to sweeping requirements, fine dust is efficiently collected through the fine brush set when dust is swept, large-particle garbage is swept into the dust suction opening through the coarse brush set when the large-particle garbage is swept, two purposes are achieved through one machine, and the adaptive capacity and the cleaning effect are improved; during switching, only the pressing plate needs to be rotated, the brush or a tool does not need to be detached, operation is easy and convenient, the structure is ingenious, and the equipment size is not increased.

Description

Technical Field

[0001] This invention relates to the field of sweeping robot technology, and in particular to a sweeping robot with switchable brushes. Background Technology

[0002] With the continuous development of smart home technology, robotic vacuum cleaners, as an important tool for household cleaning, have been widely used in various homes and offices. Their core function is to efficiently clean up debris on the floor through brush sweeping and vacuuming. Currently, most robotic vacuum cleaners on the market use a single type of brush in their side brush mechanism, either fine or coarse, making it difficult to adapt to different types of floor debris and floor environments.

[0003] Specifically, while fine-bristled brushes are effective at cleaning up small debris such as dust and hair, they are less efficient at cleaning larger particles (such as grains, crumbs, and pebbles) and are prone to hair tangling and debris getting stuck. Coarse-bristled brushes are suitable for cleaning larger particles, but their bristles are harder and spaced further apart, making it difficult to clean up fine dust and hair in the crevices of the floor and creating cleaning dead spots.

[0004] Meanwhile, most existing robot vacuum cleaners have fixed brushes that cannot be switched according to cleaning needs. If users need to clean both small and large debris, they often need to equip a robot vacuum cleaner with different brushes or disassemble and replace the brushes, which is cumbersome and increases the user's operating costs and maintenance difficulty. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a sweeping robot that can flexibly switch the type of brush according to cleaning needs and has a simple structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A robotic vacuum cleaner with switchable brushes includes a robot body. A suction port, a side brush mechanism, and a power roller mechanism are located at the bottom of the robot body. The side brush mechanism includes a rotating component and a first brush assembly and a second brush assembly located at the bottom of the rotating component. The first brush assembly includes a plurality of fine brush groups evenly distributed along the circumference, and the second brush assembly includes a plurality of coarse brush groups evenly distributed along the circumference. The fine brush groups and the coarse brush groups are arranged alternately along the circumference. The fine brush group and the coarse brush group extend downwards at an angle in their natural form. A base plate and a pressure plate are provided on the rotating assembly. The base plate extends to the bottom of the robot vacuum body. The pressure plate is movably disposed at the bottom of the rotating assembly, and several pressure plates are evenly distributed along the circumference of the outer side of the pressure plate. A first notch is formed between two pressure plates. The fine brush group or the coarse brush group is correspondingly disposed in the first notch. The pressure plates can press the fine brush group or the coarse brush group onto the base plate, so that the fine brush group or the coarse brush group does not contact the ground.

[0008] In some embodiments, a circular groove is provided at the bottom of the robot vacuum cleaner body for mounting the rotating component, a connecting shaft is rotatably mounted in the circular groove, and a rotating power mechanism is also provided in the robot vacuum cleaner body. One end of the connecting shaft is connected to the rotating power mechanism, and the other end is connected to the rotating component.

[0009] In some embodiments, the rotating assembly includes a rotating base and a cover. The bottom edge of the rotating base is provided with a circular retaining ring. The circular retaining ring has a plurality of second notches for the fine brush group and the coarse brush group to pass through. The cover is located at the bottom of the rotating base and seals the opening of the second notches. The inner end of the rotating base is connected to the connecting shaft. The base plate is located on the rotating base, and the pressure plate is movably located on the cover.

[0010] In some embodiments, a plurality of hooks are provided along the circumference at the inner end of the cover, and buckles that engage with the hooks are provided on the rotating base.

[0011] In some embodiments, the rotating base is detachably connected to the connecting shaft by screws.

[0012] In some embodiments, a guide rod is provided at the bottom center of the cover, the pressure plate is movably sleeved on the guide rod, a limiting flange is provided at the bottom of the guide rod, a spring is also sleeved on the guide rod, one end of the spring abuts against the pressure plate, and the other end abuts against the limiting flange, and a positioning structure is provided between the cover and the pressure plate.

[0013] In some embodiments, the positioning structure includes a cylindrical platform disposed at the inner end of the pressure plate, the guide rod passing through the cylindrical platform, a plurality of slots evenly distributed along the circumference of the cylindrical platform, and a plurality of locking blocks cooperating with the slots evenly distributed along the circumference of the bottom of the cover.

[0014] In some embodiments, the opening edge of the card slot is provided with a guide bevel.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By incorporating spaced-apart fine and coarse brush groups, along with a movable pressure plate structure, this robotic vacuum cleaner can selectively press one type of brush group onto the base plate, detaching it from the ground, while keeping only the other brush group operational. When cleaning dust, it can switch to the fine brush group, utilizing its delicate properties to efficiently collect fine dust. When cleaning larger debris, it can switch to the coarse brush group, using its stronger pushing force to sweep larger debris into the suction port. This dual-purpose design significantly improves the robotic vacuum cleaner's adaptability to different ground environments and debris types, as well as its cleaning effectiveness.

[0017] 2. The side brush mechanism uses the bottom plate of the rotating component and the movable pressure plate to position and press the brush group by means of the pressure plate and notch on the pressure plate; by simply rotating the pressure plate, the working state of the fine brush group and the coarse brush group can be quickly switched without disassembling the brush or using tools. It is easy to operate, and the structure is ingeniously designed without adding extra volume to the sweeping robot. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the sweeping robot of the present invention.

[0019] Figure 2 This is one of the structural schematic diagrams of the side brush mechanism of the present invention.

[0020] Figure 3 This is the second schematic diagram of the side brush mechanism of the present invention.

[0021] Figure 4 This is the third schematic diagram of the side brush mechanism of the present invention.

[0022] Figure 5 For the present invention Figure 4 Enlarged diagram of point A.

[0023] Figure 6 For the present invention Figure 4 Enlarged diagram of point B.

[0024] Figure 7 This is the fourth schematic diagram of the side brush mechanism of the present invention.

[0025] Figure 8 For the present invention Figure 7 Enlarged diagram of point C.

[0026] Figure 9 This is a partially exploded view of the side brush mechanism of the present invention.

[0027] Figure 10 This is a schematic diagram of the structure of the pressure plate of the present invention. Detailed Implementation

[0028] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0029] like Figures 1-10 A robotic vacuum cleaner with switchable brushes is shown, comprising a robot body 1. A suction port 2, a side brush mechanism 10, and a power roller mechanism 11 are disposed at the bottom of the robot body 1. The side brush mechanism 10 includes a rotating component 3 and a first brush assembly and a second brush assembly disposed at the bottom of the rotating component 3. The first brush assembly includes a plurality of fine brush groups 4 evenly distributed along the circumference, and the second brush assembly includes a plurality of coarse brush groups 5 evenly distributed along the circumference. The plurality of fine brush groups 4 and the plurality of coarse brush groups 5 are arranged alternately along the circumference, and the fine brush groups 4 and coarse brush groups 5 are arranged alternately along the circumference. The brush group 4 and the coarse brush group 5 extend downwards at an angle in their natural form. A base plate 6 and a pressure plate 7 are provided on the rotating component 3. The base plate 6 extends to the bottom of the robot vacuum body 1. The pressure plate 7 is movably disposed at the bottom of the rotating component 3. Several pressure plates 8 are evenly distributed around the outer side of the pressure plate 7 along its circumference. A first notch 9 is formed between two pressure plates 8. The fine brush group 4 or the coarse brush group 5 is correspondingly disposed in the first notch 9. The pressure plates 8 can press the fine brush group 4 or the coarse brush group 5 onto the base plate 6, so that the fine brush group 4 or the coarse brush group 5 does not contact the ground.

[0030] When the rotating component 3 is in operation, it drives the first brush component and the second brush component at the bottom to rotate synchronously in a circular motion to achieve the cleaning action. The first brush component consists of several fine brush groups 4 evenly distributed along the circumference, and the second brush component consists of several coarse brush groups 5 evenly distributed along the circumference. The fine brush groups 4 and the coarse brush groups 5 are arranged alternately along the circumference. In a natural state, both the fine brush groups 4 and the coarse brush groups 5 extend downward at an angle, which is conducive to contacting the ground and cleaning up debris.

[0031] The base plate 6 is fixedly mounted on the rotating assembly 3 and extends to the bottom of the robot vacuum body 1, serving as a support and limiting element. The pressure plate 7 is movably mounted on the bottom of the rotating assembly 3 and its position can be adjusted according to cleaning needs. Several pressure plates 8 are evenly distributed along the circumference of the outer side of the pressure plate 7, and a first notch 9 is formed between two adjacent pressure plates 8. The fine brush group 4 and the coarse brush group 5 are respectively set inside each of the first notches 9, and the first notches 9 provide limiting to prevent the brush groups from shifting or becoming misaligned when rotating.

[0032] When the fine brush group 4 is needed for cleaning, adjust the position of the pressure plate 7 so that the pressure plate 8 presses down on the coarse brush group 5, pressing the coarse brush group 5 tightly against the base plate 6. Due to the pressure limit of the pressure plate 7 and the base plate 6, the coarse brush group 5 is lifted and does not contact the ground, thus stopping its work. At this time, the fine brush group 4 is in a free state, still tilted downwards to contact the ground, and rotates at high speed with the rotating component 3 to clean the ground dust, hair and other small debris.

[0033] When the coarse brush group 5 needs to be used for cleaning, adjust the position of the pressure plate 7 again so that the pressure plate 8 presses down on the fine brush group 4, pressing the fine brush group 4 tightly against the base plate 6. The fine brush group 4 is lifted up and does not contact the ground, stopping the work. At this time, the coarse brush group 5 returns to its free state, tilts downward to contact the ground, and rotates at high speed with the rotating component 3 to clean larger debris such as particles and stones.

[0034] Furthermore, by adjusting the position of the movable pressure plate 7, the pressure plate 8 can alternately press the fine brush group 4 or the coarse brush group 5, thus achieving free switching between the two types of brushes. Combined with the suction port 2, it can complete cleaning operations in different scenarios without disassembling the brush components, thus adapting to diverse cleaning needs.

[0035] Furthermore, a circular groove is provided at the bottom of the robot vacuum cleaner body 1 for mounting the rotating component 3. A connecting shaft 22 is rotatably mounted in the circular groove. A rotating power mechanism is also provided inside the robot vacuum cleaner body 1. One end of the connecting shaft 22 is connected to the rotating power mechanism, and the other end is connected to the rotating component 3.

[0036] The rotating assembly 3 includes a rotating base 31 and a cover 32. The bottom edge of the rotating base 31 is provided with a circular retaining ring 33. The circular retaining ring 33 has several second notches 34 for the fine brush group 4 and the coarse brush group 5 to pass through. The cover 32 is located at the bottom of the rotating base 31 and seals the opening of the second notches 34. The inner end of the rotating base 31 is connected to the connecting shaft 22. The base plate 6 is located on the rotating base 31, and the pressure plate 7 is movably located on the cover 32.

[0037] The bottom of the robot vacuum cleaner body 1 has a circular groove for mounting the rotating component 3. The circular groove provides installation positioning and rotation space for the rotating component 3, ensuring that the rotating component 3 does not shift or shake when it is running. A connecting shaft 22 is rotatably mounted inside the circular groove. The connecting shaft 22 serves as a power transmission component, realizing the power connection between the rotating power mechanism and the rotating component 3. After the rotating power mechanism inside the robot vacuum cleaner body 1 is started, it outputs rotational power, which drives the connecting shaft 22 to rotate synchronously, thereby driving the rotating component 3 connected to the other end of the connecting shaft 22 to rotate as a whole, providing a power basis for brush cleaning.

[0038] The rotating assembly 3 consists of a rotating base 31 and a cover 32, which work together to install and limit the brush assembly. The rotating base 31 is the main structure of the rotating assembly 3. A circular retaining ring 33 is provided on its bottom edge. Several second notches 34 are provided on the circular retaining ring 33. The second notches 34 are used for the fine brush group 4 and the coarse brush group 5 to pass through, so that the fine brush group 4 and the coarse brush group 5 can extend to the bottom of the rotating assembly 3 to meet the needs of cleaning in contact with the ground. The cover 32 is installed at the bottom of the rotating base 31 and seals the opening of the second notches 34. It can limit the fine brush group 4 and the coarse brush group 5 passing through the second notches 34 and prevent them from falling off the second notches 34 during the rotating cleaning process.

[0039] The inner end of the rotating seat 31 is fixedly connected to the connecting shaft 22. When the connecting shaft 22 rotates under the drive of the rotating power mechanism, it will drive the rotating seat 31 to rotate synchronously, thereby driving the cover 32, the circular retaining ring 33, and the fine brush group 4 and the coarse brush group 5 installed in the second notch 34 to perform a circular motion together to achieve the cleaning action. The bottom plate 6 is installed on the rotating seat 31, continuing the original support and limiting function, and providing bottom support for the brush group. The pressure plate 7 is movably installed on the cover 32 and can be flexibly adjusted in position. The pressure plate 8 on its outer side cooperates with the cover 32 and the bottom plate 6 to realize the alternating pressing and releasing of the fine brush group 4 and the coarse brush group 5.

[0040] See Figure 6 , Figure 9 As shown, a plurality of hooks 41 are provided along the circumference of the inner end of the cover 32, and buckle holes 42 that cooperate with the hooks 41 are provided on the rotating seat 31. The rotating seat 31 is detachably connected to the connecting shaft 22 by screws 51.

[0041] The assembly and fixation of the cover 32 and the rotating seat 31 are achieved through the cooperation of the hooks 41 and the buckles 42. Several hooks 41 are provided along the circumference of the inner end of the cover 32, and buckles 42 that are adapted to the hooks 41 are provided on the rotating seat 31. During assembly, the cover 32 is placed on the bottom of the rotating seat 31, so that each hook 41 is engaged in the corresponding buckle 42. Through the engagement of the hooks 41 and the buckles 42, the cover 32 and the rotating seat 31 are quickly assembled and fixed. At the same time, it is ensured that the cover 32 can stably seal the second notch 34 at the bottom of the rotating seat 31, and form a reliable limit for the fine brush group 4 and the coarse brush group 5 passing through the second notch 34, preventing them from falling off during the rotation cleaning process.

[0042] The connection between the rotating seat 31 and the connecting shaft 22 adopts a detachable structure design. Specifically, the connection is fixed by screws 51. Screws 51 pass through the rotating seat 31 and are threadedly connected to the connecting shaft 22, so that the rotating seat 31 and the connecting shaft 22 are firmly connected. This ensures that the connecting shaft 22 can stably drive the rotating seat 31 to rotate synchronously when it rotates, providing stable power transmission for the cleaning action of the fine brush group 4 and the coarse brush group 5.

[0043] When it is necessary to maintain or replace the fine brush group 4 and the coarse brush group 5, external force can be applied first to disengage the hook 41 on the cover 32 from the buckle hole 42 of the rotating seat 31, so that the cover 32 can be removed from the bottom of the rotating seat 31. Then, the screw 51 can be removed to release the fixed relationship between the rotating seat 31 and the connecting shaft 22. At this time, the entire side brush mechanism can be disassembled to facilitate the cleaning, maintenance or replacement of the fine brush group 4 and the coarse brush group 5.

[0044] See Figures 6-10 As shown, a guide rod 61 is provided at the bottom center of the cover 32, and the pressure plate 7 is movably sleeved on the guide rod 61. A limiting flange 62 is provided at the bottom of the guide rod 61, and a spring 63 is also sleeved on the guide rod 61. One end of the spring 63 abuts against the pressure plate 7, and the other end abuts against the limiting flange 62. A positioning structure is provided between the cover 32 and the pressure plate 7.

[0045] The positioning structure includes a cylindrical platform 71 located at the inner end of the pressure plate 7, a guide rod 61 passing through the cylindrical platform 71, a plurality of slots 72 evenly distributed along the circumference of the cylindrical platform 71, and a plurality of locking blocks 73 that cooperate with the slots 72 evenly distributed along the circumference of the bottom of the cover 32, and a guide bevel is provided at the opening edge of the slot 72.

[0046] The movable installation of the pressure plate 7 is achieved through the cooperation of the guide rod 61, the spring 63 and the limiting flange 62. The guide rod 61 is provided at the bottom center of the cover 32. The pressure plate 7 is movably sleeved on the guide rod 61. The guide rod 61 provides guidance for the up and down movement of the pressure plate 7, ensuring that the pressure plate 7 does not deviate or misalign during adjustment, and ensuring that the pressure plate 8 can accurately correspond to and press the fine brush group 4 or the coarse brush group 5.

[0047] The bottom of the guide rod 61 is provided with a limiting flange 62, and a spring 63 is sleeved on the guide rod 61. One end of the spring 63 abuts against the pressure plate 7, and the other end abuts against the limiting flange 62. The limiting flange 62 plays a bottom limiting role for the spring 63, preventing the spring 63 from falling off the bottom of the guide rod 61. When the spring 63 is in its natural state, it will apply an upward elastic force to the pressure plate 7, keeping the pressure plate 7 in its initial position, ensuring that the pressure plate 8 can stably press the corresponding brush group, and preventing the pressure plate 7 from sliding down on its own, which would cause the brush switching to fail.

[0048] A positioning structure is provided between the cover 32 and the pressure plate 7 to fix the adjustment position of the pressure plate 7 and achieve stable positioning after brush switching. This positioning structure consists of a cylindrical platform 71, a slot 72, and a locking block 73. The cylindrical platform 71 is located at the inner end of the pressure plate 7, and the guide rod 61 passes through the cylindrical platform 71. The cylindrical platform 71 provides auxiliary guidance for the guide rod 61 and also provides an installation carrier for the slot 72. Several slots 72 are evenly distributed along the circumference of the cylindrical platform 71, and several locking blocks 73 that cooperate with the slots 72 are evenly distributed along the circumference of the bottom of the cover 32. The locking cooperation between the slots 72 and the locking blocks 73 can fix the pressure plate 7 in the preset adjustment position.

[0049] The opening edge of the slot 72 is provided with a guide bevel. When it is necessary to adjust the position of the pressure plate 7 or switch the brush type, press the pressure plate 7 down. The pressure plate 7 moves downward along the guide rod 61 and compresses the spring 63 at the same time. At this time, the locking block 73 smoothly disengages from the current slot 72 under the guidance of the guide bevel. Then, rotate the pressure plate 7 to drive the cylindrical platform 71 to rotate synchronously, so that the locking block 73 is aligned with another slot 72. Release the pressure plate 7, the spring 63 elastically returns to its original position, pushes the pressure plate 7 upward, and makes the locking block 73 lock into the corresponding slot 72, thus completing the positioning of the pressure plate 7.

[0050] After the pressure plate 7 is positioned, the outer pressure plate 8 synchronously switches positions to press the fine brush group 4 or the coarse brush group 5, pressing the pressed brush group tightly onto the base plate 6 so that it does not contact the ground. The unpressed brush groups extend normally to the ground and rotate synchronously with the rotating seat 31 and the cover 32 to complete the cleaning action. The entire brush switching process is convenient to operate and reliable in positioning thanks to the guidance of the guide rod 61, the elasticity of the spring 63, and the limiting of the positioning structure. At the same time, combined with the original assembly structure of the hook 41, the buckle hole 42, and the screw 51, it not only ensures the operational stability of the side brush mechanism 10, but also improves the accuracy and convenience of brush switching.

[0051] Based on the accompanying drawings and the foregoing illustrations and descriptions, the basic principles and main features of the present invention, as well as its advantages, those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A robotic vacuum cleaner with interchangeable brushes, comprising a robotic vacuum cleaner body (1), wherein a suction port (2), a side brush mechanism (10), and a power roller mechanism (11) are provided at the bottom of the robotic vacuum cleaner body (1), characterized in that: The side brush mechanism (10) includes a rotating component (3) and a first brush component and a second brush component located at the bottom of the rotating component (3). The first brush component includes a plurality of fine brush groups (4) evenly distributed along the circumference, and the second brush component includes a plurality of coarse brush groups (5) evenly distributed along the circumference. The plurality of fine brush groups (4) and the plurality of coarse brush groups (5) are arranged alternately along the circumference, and the fine brush groups (4) and the coarse brush groups (5) extend downward at an angle in their natural form. A base plate (6) and a pressure plate are provided on the rotating component (3). (7) The base plate (6) extends to the bottom of the robot body (1). The pressure plate (7) is movably disposed at the bottom of the rotating assembly (3). Several pressure plates (8) are evenly distributed along the circumference on the outer side of the pressure plate (7). A first notch (9) is formed between two pressure plates (8). The fine brush group (4) or the coarse brush group (5) is correspondingly disposed in the first notch (9). The pressure plate (8) can press the fine brush group (4) or the coarse brush group (5) onto the base plate (6) so that the fine brush group (4) or the coarse brush group (5) does not contact the ground.

2. A sweeping robot with switchable brushes according to claim 1, characterized in that: A circular groove is provided at the bottom of the robot body (1) for mounting the rotating component (3). A connecting shaft (22) is rotatably mounted in the circular groove. A rotating power mechanism is also provided in the robot body (1). One end of the connecting shaft (22) is connected to the rotating power mechanism, and the other end is connected to the rotating component (3).

3. A sweeping robot with switchable brushes according to claim 2, characterized in that: The rotating assembly (3) includes a rotating seat (31) and a cover (32). The bottom edge of the rotating seat (31) is provided with a circular retaining ring (33). The circular retaining ring (33) has several second notches (34) for the fine brush group (4) and the coarse brush group (5) to pass through. The cover (32) is located at the bottom of the rotating seat (31) and seals the opening of the second notches (34). The inner end of the rotating seat (31) is connected to the connecting shaft (22). The base plate (6) is located on the rotating seat (31). The pressure plate (7) is movably located on the cover (32).

4. A sweeping robot with switchable brushes according to claim 3, characterized in that: Several hooks (41) are provided along the circumference at the inner end of the cover (32), and buckles (42) that cooperate with the hooks (41) are provided on the rotating seat (31).

5. A sweeping robot with switchable brushes according to claim 3, characterized in that: The rotating seat (31) is detachably connected to the connecting shaft (22) by screws (51).

6. A sweeping robot with switchable brushes according to claim 3, characterized in that: A guide rod (61) is provided at the bottom center of the cover (32). The pressure plate (7) is movably sleeved on the guide rod (61). A limiting flange (62) is provided at the bottom of the guide rod (61). A spring (63) is also sleeved on the guide rod (61). One end of the spring (63) abuts against the pressure plate (7), and the other end abuts against the limiting flange (62). A positioning structure is provided between the cover (32) and the pressure plate (7).

7. A sweeping robot with switchable brushes according to claim 6, characterized in that: The positioning structure includes a cylindrical platform (71) located at the inner end of the pressure plate (7), a guide rod (61) passing through the cylindrical platform (71), a number of slots (72) evenly distributed along the circumference on the cylindrical platform (71), and a number of locking blocks (73) that cooperate with the slots (72) evenly distributed along the circumference at the bottom of the cover (32).

8. A sweeping robot with switchable brushes according to claim 7, characterized in that: The opening edge of the slot (72) is provided with a guide bevel.

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