floor brush and cleaning device

Abstract

Floor brush, characterized in that the floor brush (100) comprises: a floor brush body (120) comprising a receiving cavity for receiving cleaning elements; a first light-emitting device (140) and a second light-emitting device (150), wherein the first light-emitting device (140) and the second light-emitting device (150) are each attached to the front and rear of the floor brush body (120), respectively; and wherein the floor brush body (120) is oriented transversely perpendicular to the direction of the forward and backward movement of the floor brush body (120) on the surface to be cleaned; and wherein the second light-emitting device (150) is in a light-emitting state during the forward movement of the floor brush body (120).

Description

TECHNICAL AREA The present utility model relates to the field of cleaning technology, in particular a floor brush and cleaning device. STATE OF THE ART For cleaning devices, vacuum cleaners are often used as an example. A vacuum cleaner is a cleaning device that uses negative pressure to pick up dirt from surfaces to be cleaned. When cleaning a specific target area on a surface, the user typically pushes the vacuum cleaner forward, causing the floor brush to cross the surface in a forward direction. The vacuum cleaner is then pulled backward, causing the floor brush to cross the surface in the reverse direction. After repeatedly pushing and pulling back, the target area is thoroughly cleaned, and then the vacuum cleaner is repositioned to clean the next target area. The user remains uncertain whether the target area is thoroughly cleaned, and there is a risk that previously cleaned areas may not be adequately treated. Furthermore, due to this uncertainty regarding the cleanliness of previously treated areas, the user often increases the number of push-pull cycles before repositioning the vacuum cleaner to ensure the cleaning effect, which leads to reduced cleaning efficiency. CONTENTS OF THE PRESENT USE SAMPLE To solve the aforementioned technical problems, an embodiment of the present disclosure provides a floor brush and a cleaning device. An embodiment of the first aspect of the present application provides a floor brush comprising a floor brush body, a first light-emitting device, and a second light-emitting device. The floor brush body includes a receiving cavity for receiving cleaning elements; wherein the first light-emitting device and the second light-emitting device are each attached to the front and rear of the floor brush body, respectively; and wherein the floor brush body is oriented transversely perpendicular to the direction of the forward and backward movement of the floor brush body on the surface to be cleaned; and wherein the first light-emitting device illuminates the cleaned area in front of the floor brush body, while the second light-emitting device illuminates the cleaned area behind the floor brush body. Optionally, the first light-emitting device and the second light-emitting device are located between the two opposite ends of the floor brush body in the transverse direction. Optionally, the first light-emitting device and the second light-emitting device are each located at the intermediate position of the floor brush body in the transverse direction. Optionally, the vertical distance between the central position of the light beam emitted by the first light-emitting device and the surface to be cleaned, and the vertical distance between the central position of the light beam emitted by the second light-emitting device and the surface to be cleaned, are both less than or equal to 10 mm. Optionally, the cleaning element includes a roller brush, wherein the angle between the vertical line connecting the central position of the light beam emitted by the first light-emitting device to the roller brush axis and the horizontal plane, and the angle between the vertical line connecting the central position of the light beam emitted by the second light-emitting device to the roller brush axis and the horizontal plane, are each between -45° and 45°. Optionally, the vertical projection of the first light-emitting device and / or the second light-emitting device onto the horizontal plane lies within the vertical projection area of ​​the floor brush body onto the horizontal plane, wherein the vertical projection of the first light-emitting device and / or the second light-emitting device onto a predetermined vertical surface lies within the vertical projection area of ​​the floor brush body onto the predetermined vertical surface; and wherein the predetermined vertical surface is aligned parallel to the transverse direction of the cleaning element and perpendicular to the horizontal plane. Optionally, during the forward movement of the floor brush body, the second light-emitting device is in a light-emitting state; while during the backward movement of the floor brush body, the first light-emitting device is in a light-emitting state. Optionally, during the forward or backward movement of the floor brush body, both the first light-emitting device and the second light-emitting device are in the light-emitting state. Optionally, the floor brush includes a detection device electrically connected to the control board, wherein the detection device is installed on the floor brush body, and wherein the detection device is electrically connected to the first light-emitting device and the second light-emitting device respectively; and wherein the detection device is configured to detect the direction of movement of the floor brush body and output a direction-of-movement signal to the control board, and wherein the control board is configured to control, upon triggering by the direction-of-movement signal, the first light-emitting device and the second light-emitting device such that one of them illuminates or the two illuminate synchronously. Optionally, the floor brush body comprises a main housing and a brush cover. The cleaning element is rotatably connected to the main housing; the brush cover is connected to the main housing and covers the cleaning element, and at least one of the first light-emitting device and one of the second light-emitting device are installed on the brush cover. Optionally, at least one of the first light-emitting device and the second light-emitting device is installed on an outer wall of the brush cover facing away from the receiving cavity. Optionally, the brush cover is provided with a light-emitting opening, wherein at least one of the first light-emitting device and the second light-emitting device is located in the receiving cavity and is installed on an inner wall of the brush cover facing the receiving cavity, and wherein the light emitted by the first light-emitting device and the second light-emitting device passes through the light-emitting opening to illuminate the surface to be cleaned. Optionally, the brush cover comprises at least two superimposed layers of cover bodies, with at least one of the first light-emitting device and the second light-emitting device being arranged between the two layers of cover bodies. Optionally, the first and second light-emitting devices each comprise a light source and a light-shaping element, the light-shaping element being configured to receive the light beam emitted by the light source and direct it to the surface to be cleaned, such that the light-shadow area illuminated by the light source forms a sector on the surface to be cleaned. The transverse edges of the two ends of the floor brush body are located within the sector, or alternatively, the transverse edges of the two ends of the floor brush body are located outside the sector and are less than 20 mm from the boundaries of the sector. Optionally, the angle of the sector area is 80°. The angle of the sector area can correspond to the shape of the roller brush; if the roller brush is conical, the angle of the sector area can correspond to the angle of the cone. Optionally, the first light-emitting device and the second light-emitting device each comprise a light source and a control wiring harness, wherein the control wiring harness comprises a first section and a second section, and wherein one end of the first section is electrically connected to the light source, while one end of the second section is electrically connected to the power supply and / or the control board; and wherein the first section is installed on the brush cover, while the second section is installed on the main housing; and wherein the brush cover is detachably connected to the main housing, and wherein the other end of the first section is detachably connected to the other end of the second section. Optionally, the light source includes a dust-detecting light source that can emit green or blue light, and / or a sterilizing light source that can emit ultraviolet light. An embodiment of the second aspect of the present application provides a cleaning device comprising a floor brush in any of the above embodiments of the first aspect. In the embodiment described in the present disclosure, the cleaning device can meet the lighting requirements for different cleaning directions by providing light-emitting devices (namely, the first light-emitting device and the second light-emitting device) on the front and rear of the floor brush body. Furthermore, these two light-emitting devices form the hardware basis for implementing multiple control modes, thereby improving the flexibility of the cleaning device in various application scenarios. The first light-emitting device illuminates the area to be cleaned in front of the floor brush body, allowing the user to verify whether the area in front of the floor brush body has been thoroughly cleaned.The second light-emitting device illuminates the cleaned area behind the floor brush body, allowing the user to check whether the area behind the brush body has been thoroughly cleaned. If the user detects any dirty spots within the cleaned area, they can immediately clean that section again, thus improving the cleaning performance and user experience. The first and second light-emitting devices are used to illuminate areas that have already been cleaned. Consequently, the corresponding light-emitting device for uncleaned areas does not need to be activated. For example, during the initial forward movement of the vacuum cleaner, the first light-emitting device can be deactivated, while the second light-emitting device remains active and illuminates only the area that has been cleaned at the rear. In this way, unnecessary lighting can be reduced, and energy consumption lowered. During the cleaning process, as the vacuum cleaner is pushed forward, the second light-emitting device is activated to illuminate the area behind the floor brush body. If the area behind appears thoroughly clean, the vacuum cleaner does not need to be pulled back; it can continue to be pushed forward. If, during the forward movement, it is found that the area behind is still dirty, the vacuum cleaner can be pulled back to repeat the cleaning process until it is thoroughly clean, thus reducing unnecessary cleaning cycles. When pulling the vacuum cleaner back, the first light-emitting device illuminates the area in front of the floor brush body.If the area in front of the floor brush body is found to be thoroughly clean, the vacuum cleaner can be repositioned; if the area in front of the floor brush body is still dirty, the vacuum cleaner can be pushed forward again to repeat the cleaning process in the same area. Thus, the use of both the first and second light-emitting devices can effectively improve cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWING Fig. 1 shows a schematic diagram of the structure of a vacuum cleaner provided in some embodiments of the present application; Fig. 2 shows a schematic side view of a floor brush with two roller brushes in some embodiments of the present application; Fig. 3 shows a top view of a floor brush in some embodiments of the present application; Fig. 4 shows a schematic side view of a floor brush with a single roller brush in some embodiments of the present application; Fig. 5 shows a first light-emitting device installed on the outer wall of the brush cover in some embodiments of the present application; Fig. 6 shows a first light-emitting device installed between two layers of cover bodies of the brush cover in some embodiments of the present application. Reference symbol list 100 Floor brush 101 Light source 102 Light shaping element 110 Roller brush 120 Floor brush body 121 Main housing 122 Brush cover 1221 Cover body 130 Connecting element 140 First light-emitting device 141 Control wiring harness 1411 First section 150 Second light-emitting device 200 Machine body 300 Main machine 310 Suction device 320 Separating device A1 Desired sector area A2 Undesired sector area L1 Floor surface L2 Horizontal plane L3 Vertical surface tangential to the foremost position of the brush cover L4 Preset vertical surface H Vertical distance between the central position of the light beam emitted by the first light-emitting device and the floor surface. DETAILED DESCRIPTION To better explain the technical solutions and advantageous effects of the present utility model, detailed explanations are given below using specific embodiments. The accompanying drawings are not necessarily to scale; partial features may be enlarged or reduced to illustrate details of these features more clearly. Unless otherwise defined, the technical and scientific terms used herein have the same meaning as in the technical field to which this application relates. In the explanatory notes to this utility model, the directional or positional relationships described using terms such as "center," "transverse," "length," "height," "top," "bottom," "front," "back," "vertical," "horizontal," "bottom section," "inside," "outside," etc., are based on the directional or positional relationships illustrated in the accompanying drawings. They serve only to explain this utility model and to facilitate its explanation. They do not indicate that the depicted devices or elements have specific orientations or should be constructed and operated in specific directions. Therefore, they cannot be construed as a limitation of this utility model. In this utility model, the terms "first" and "second" are used solely for the sake of clarity and are not to be understood as indicating the relative importance of the described features or the number of specified technical features. Therefore, features defined as "first" or "second" may expressly include at least one such feature. In the description of this utility model, "several" means at least two, such as two, three, etc. Unless expressly defined otherwise, terms such as "mounted," "connected," "coupled," "fastened," and "arranged" are to be understood in a broad sense in this utility model. For example, the "connection" can be a permanent connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection via a medium; it can also be a connection within two elements or an interaction between two elements. The person skilled in the art in this field can understand the specific meanings of the aforementioned technical terms in this utility model based on the specific situations. The cleaning devices of the embodiments of the present application include, but are not limited to, vacuum cleaners, floor cleaning machines and dust mite removers. For the sake of simplicity, a vacuum cleaner is used as an example. Fig. 1 shows an exemplary schematic diagram of the structure of a vacuum cleaner. The vacuum cleaner comprises a floor brush 100, a machine body 200, and a main unit 300. The floor brush 100 can be moved back and forth over a surface to be cleaned. The machine body 200 connects the floor brush 100 to the main unit 300 and draws an airflow containing dirt through the suction opening on the floor brush 100 into the channel inside the main unit 300. The machine body 200 can be rod-shaped or tubular and may have internal channels. The dirt includes dust, skin flakes, scraps of paper, hair, grains of rice, fruit peels, and similar materials. Surfaces to be cleaned include, but are not limited to, floors, walls, and carpets. For clarity, floors are used as an example in the following description. The main machine 300 comprises a suction device 310 and a separating device 320. The suction device 310 includes an electric motor and an impeller, the electric motor driving the impeller to rotate and generate a suction flow. The separating device 320 separates dirt from the airflow. Separated dirt can be temporarily stored in the separating device 320, while the airflow is discharged through outlet openings on the suction device 310. Fig. 2 shows, by way of example, the floor brush 100 attached to the vacuum cleaner from Fig. 1. The floor brush 100 comprises a brush body 120, a first light-emitting device 140, and a second light-emitting device 150. The brush body 120 includes a receiving cavity for receiving cleaning elements. The first light-emitting device 140 and the second light-emitting device 150 are each attached to the front and rear of the brush body 120, respectively. The brush body 120 is oriented transversely perpendicular to the direction of its forward and backward movement on the surface to be cleaned. The first light-emitting device 140 illuminates the area to be cleaned in front of the brush body 120, while the second light-emitting device 150 illuminates the area to be cleaned behind the brush body 120. The cleaning element is rotatably mounted on the floor brush body 120. The previously mentioned suction opening is located on the floor brush body 120 and is connected to the receiving cavity. Part of the cleaning element is located inside the receiving cavity, while another part extends through the opening of the receiving cavity to make contact with the floor surface. As the floor brush body 120 moves back and forth, it drives the cleaning element to scrape the floor surface. Dirt from the floor surface is brushed up and, along with the suction flow, drawn through the suction opening and channel of the machine body 200 into the separating device 320, thus achieving the cleaning objective. The cleaning device can meet the lighting requirements for different cleaning directions by providing light-emitting devices (namely the first light-emitting device 140 and the second light-emitting device 150) on the front and back of the floor brush body 120. Furthermore, these two light-emitting devices form the hardware basis for implementing multiple control modes, thereby improving the flexibility of the cleaning device in various application scenarios. The first light-emitting device 140 illuminates the area being cleaned in front of the floor brush body 120, allowing the user to check whether the area in front of the floor brush body 120 has been thoroughly cleaned. The second light-emitting device 150 illuminates the area being cleaned behind the floor brush body 120, allowing the user to check whether the area behind the floor brush body 120 has been thoroughly cleaned. If the user detects any soiled areas within the cleaned area, they can immediately re-clean that section, thus improving the cleaning performance and the user experience. The first light-emitting device 140 and the second light-emitting device 150 serve to illuminate areas that have already been cleaned. Consequently, the corresponding light-emitting device for uncleaned areas does not need to be activated. For example, during the initial forward movement of the vacuum cleaner, the first light-emitting device 140 can be deactivated, while the second light-emitting device 150 remains active and illuminates only the area cleaned at the rear. In this way, unnecessary illumination time can be reduced and energy consumption lowered. During the cleaning process, as the vacuum cleaner is pushed forward, the second light-emitting device 150 is activated to illuminate the area behind the floor brush body 120. If the area behind appears thoroughly clean, the vacuum cleaner does not need to be pulled back; it can continue to be pushed forward. If, during the forward movement, it is determined that the area behind is still dirty, the vacuum cleaner can be pulled back to repeat the cleaning process until it is thoroughly clean, thus reducing unnecessary cleaning cycles. When the vacuum cleaner is pulled back, the first light-emitting device 140 illuminates the area in front of the floor brush body 120. If it is determined that the area in front of the floor brush body is thoroughly clean, the vacuum cleaner can be repositioned to clean other areas.If it is found that the cleaned area in front of the floor brush body is still dirty, the vacuum cleaner can be pushed forward again to repeat the cleaning process in the same area. Thus, the use of the first light-emitting device 140 and the second light-emitting device 150 can also effectively improve cleaning efficiency. In some optional embodiments, the first light-emitting device 140 and the second light-emitting device 150 are located between the two opposite ends of the floor brush body 120 in the transverse direction, as shown in Fig. 3. This arrangement prevents the light emitted by both devices from being too concentrated on either end of the floor brush body 120 in the transverse direction. Instead, the light distribution is more even, making it easier to detect the degree of soiling at different positions in the transverse direction.This effect is more pronounced when both the first light-emitting device 140 and the second light-emitting device 150 are positioned at the intermediate position of the floor brush body 120 in the transverse direction. In some embodiments, the second light-emitting device 150 is in a light-emitting state during the forward movement of the floor brush body 120. During the backward movement of the floor brush body 120, the first light-emitting device 140 is in a light-emitting state. Depending on whether the floor brush 120 is moving forward or backward, the corresponding light-emitting device illuminates, thus facilitating both monitoring of the cleaning progress and energy conservation. For example, if a particular area has already been cleaned, then in subsequent cleaning cycles, when the floor brush 120 moves forward, the area immediately behind it represents the last cleaned area. In this case, the first light-emitting device 140 is switched off, while the second light-emitting device 150 is activated to illuminate the last cleaned area. When the floor brush 120 moves backward, the area immediately in front represents the last cleaned area. In this case, the second light-emitting device 150 is switched off, while the first light-emitting device 140 is activated to illuminate the last cleaned area. This approach allows for more precise detection of the cleaning status without requiring both light-emitting devices to be active simultaneously.Consequently, in the embodiment of the present application, the term "cleaned area" also refers to the area that was last cleaned. Referring to Fig. 2, the floor brush 100 further comprises a connecting element 130, which is positioned on the floor brush body 120. The machine body 200 is pivotably connected to the floor brush 100 via the connecting element 130, allowing the vacuum cleaner to assume a flat lying position (with the machine body 200 being essentially parallel to the floor surface). This configuration facilitates cleaning in rooms with low ceilings. In other embodiments, during the forward or backward movement of the floor brush body 120, the first light-emitting device 140 and the second light-emitting device 150 are each in a light-emitting state. In some optional embodiments, the floor brush 100 comprises a detection device electrically connected to the control board, the detection device being installed on the floor brush body 120, and the detection device being electrically connected to the first light-emitting device 140 and the second light-emitting device 150 respectively. The detection device is configured to detect the direction of movement of the floor brush body 120 and output a direction-of-movement signal to the control board, and the control board being configured to control the first light-emitting device 140 and the second light-emitting device, upon activation by the direction-of-movement signal, such that one of them illuminates. Based on the direction of movement detected by the sensing device, the first light-emitting device 140 and the second light-emitting device 150 can be controlled immediately and effectively to switch on or off. This ensures that the second light-emitting device 150 illuminates when the vacuum cleaner is pushed forward, and the first light-emitting device 140 illuminates when the vacuum cleaner is pulled back. This coordination of the push / pull movements with the corresponding light-emitting devices enhances the user experience. Of course, when triggered by the direction of movement signal, the control board can also control the first light-emitting device 140 and the second light-emitting device so that they light up synchronously. The detection device may include, but is not limited to, at least one optical sensor, one inertial sensor, and one ultrasonic sensor. The optical sensor may be an infrared sensor, while the inertial sensor may be an accelerometer or a gyroscope. The control board can be attached either to the main machine 300 or to the floor brush body 120. With reference to Fig. 2, in some optional embodiments the vertical distance H between the central position of the light beam emitted by the first light-emitting device 140 and the surface to be cleaned and the vertical distance between the central position of the light beam emitted by the second light-emitting device 150 and the surface to be cleaned are both less than or equal to 10 mm. For example, the distances L1 or L2 can be set independently to less than 5 mm or less than 8 mm respectively. This low-profile floor lighting optic improves the scattering and reflection of light by fine dirt particles. This enhanced interaction makes such dirt particles more visible under illumination, thus improving the visibility of dirt. Referring to the figure, in some optional embodiments the cleaning element comprises a roller brush 110. The angle (see α3 in Fig. 2) between the vertical line connecting the central position of the light beam emitted by the first light-emitting device 140 with the axis of the roller brush and the horizontal plane L2, as well as the angle between the vertical line connecting the central position of the light beam emitted by the second light-emitting device 150 with the axis of the roller brush and the horizontal plane, are each between -45° and 45°. Here, the angles can alternatively be set independently of each other in ranges from 0° to 45° (see α1 in Fig. 2) or -45° to 0° (see α2 in Fig. 2).This configuration effectively ensures that the light-emitting devices illuminate the ground surface at a low height, thereby improving the scattering and reflection of light by fine dirt particles. Consequently, such dirt particles become more visible under illumination, thus improving the overall visibility of dirt. Fig. 3 and Fig. 4 each show alternative configurations of the brush assembly 100, which differ from that shown in Fig. 2. In some optional embodiments, the vertical projection of the first light-emitting device 140 and the second light-emitting device 150 onto the horizontal plane lies within the vertical projection area of ​​the floor brush body onto the horizontal plane, wherein the vertical projection of the first light-emitting device 140 and the second light-emitting device 150 onto a predetermined vertical surface lies within the vertical projection area of ​​the floor brush body onto the predetermined vertical surface. The predetermined vertical surface is oriented parallel to the transverse direction of the cleaning element and perpendicular to the horizontal plane. This configuration is better suited for vacuum cleaners with two roller brushes 110, as shown in Fig. 2 and Fig. 3. The predetermined vertical surface can be referred to here as L4 in Fig. 2. In other embodiments, the vertical projection of the first light-emitting device 140 (or the second light-emitting device 150) onto the horizontal plane lies within the vertical projection area of ​​the floor brush body 120 onto the horizontal plane, wherein the vertical projection of the first light-emitting device 140 (or the second light-emitting device 150) onto a predetermined vertical surface lies within the vertical projection area of ​​the floor brush body 120 onto the predetermined vertical surface. The predetermined vertical surface is oriented parallel to the transverse direction of the cleaning element and perpendicular to the horizontal plane. This configuration is better suited for vacuum cleaners with a single roller brush 110, as shown in Fig. 4. The vertical projections of the light-emitting devices (referring to at least one of the first light-emitting devices 140 and the second light-emitting device 150) onto the horizontal plane lie within the vertical projection area of ​​the floor brush body 120 onto the horizontal plane. This ensures that the light-emitting devices do not extend beyond the floor brush body 120 (see Fig. 2, where the first light-emitting device 140 is positioned behind the vertical surface tangentially to the foremost position of the brush cover). In this way, the light-emitting devices do not interfere with the edge-cleaning function of the cleaning element during edge cleaning by the front of the vacuum cleaner, thus mitigating problems with cleaning gaps along the front edge.Furthermore, if the vacuum cleaner encounters an obstacle while moving forward, the light-emitting devices are not subjected to the impact force first, thus ensuring a certain degree of protection for the light-emitting devices. The vertical projections of the light-emitting devices onto a predetermined vertical surface lie within the vertical projection area of ​​the floor brush body 120 onto the predetermined vertical surface. This ensures that the light-emitting device does not extend above the highest point of the floor brush body 120, thus guaranteeing the original height of the floor brush body 120. Consequently, the installation of the light-emitting device does not obstruct the floor brush body 120's access to low-ceiling areas, such as under beds or sofas, for cleaning. Referring to Fig. 5, the first light-emitting device 140 is positioned within area B defined by the dashed line and the brush cover 122.This arrangement prevents the first light-emitting device 140 from projecting forward beyond the floor brush body 120 or upward beyond the highest point of the floor brush body 120. In some optional embodiments, as shown in Fig. 2, the floor brush body 120 comprises a main housing 121 and a brush cover 122. The cleaning element is rotatably connected to the main housing 121. The brush cover 122 is connected to the main housing 121 and covers the cleaning element. The first light-emitting device 140 and the second light-emitting device 150 are each attached to the brush cover 122. This configuration is better suited for vacuum cleaners with two roller brushes 110. In vacuum cleaners with a single roller brush 110, as shown in Fig. 4, one of the first light-emitting device 140 and the second light-emitting device 150 is attached to the brush cover 122, while the other may be attached to the floor brush body 120. The brush cover 122 is positioned above the cleaning element and serves to prevent dirt from escaping due to the centrifugal forces generated by the rotating roller brush 110 and to prevent external contaminants from entering the interior of the floor brush 100. The transverse length of the brush cover 122 corresponds essentially to the axial length of the roller brush 110. The relatively long transverse length of the brush cover 122 allows for flexible positioning of the light-emitting devices. Furthermore, the brush cover 122 is typically designed as a removable structure. By attaching the light-emitting device to the brush cover 122, the light-emitting device can be removed simultaneously with the brush cover 122, thus facilitating maintenance or replacement of the light-emitting device. With reference to Fig. 5, in some optional embodiments at least one of the first light-emitting device 140 and the second light-emitting device 150 is installed on an outer wall of the brush cover 122 facing away from the receiving cavity. Alternatively, in some optional embodiments, the brush cover 122 is provided with a light-emitting opening, wherein at least one of the first light-emitting device 140 and the second light-emitting device 150 are located in the receiving cavity and are installed on an inner wall of the brush cover 122 facing the receiving cavity. The light emitted by the first light-emitting device 140 and the second light-emitting device 150 each passes through the respective light-emitting opening to illuminate the surface to be cleaned. Alternatively, the brush cover 122, as shown in Fig. 6, comprises in some optional embodiments at least two superimposed layers of cover bodies 1221. At least one of the first light-emitting device 140 and the second light-emitting device 150 is located between two layers of cover bodies 1221. If the light-emitting devices are at least partially attached to the inner wall of the brush cover 122 or between the two layers of cover bodies 1221, the brush cover 122 exhibits improved structural integrity and offers a better user experience. If the light-emitting devices are at least partially attached to the outer wall of the brush cover 122, this facilitates disassembly, maintenance, and replacement of the light-emitting devices. In some optional embodiments, the first light-emitting device 140 and the second light-emitting device 150, as shown in Fig. 1, each comprise a light source 101 and a light-shaping element 102. The light-shaping element 102 is configured to receive the light beam emitted by the light source 101 and direct it to the surface to be cleaned, so that the light-shadow area illuminated by the light source 101 forms a sector on the surface to be cleaned. The transverse edges of the two ends of the floor brush body 120 are located within the sector, or alternatively, the transverse edges of the two ends of the floor brush body 120 are located outside the sector (see desired sector A1 in Fig. 3) and are less than 20 mm from the boundaries of the sector.This arrangement allows the light emitted by the light source 101 to cover as large a part as possible of the lateral area in front of and behind the floor brush 100, thereby reducing or even eliminating unlit blind spots at the lateral ends or at the front of the floor brush body 120 (see unwanted sector area A2 in Fig. 3). Preferably, the angle of the sector area is 80°. The light source 101 of the first light-emitting device 140 and the light source 101 of the second light-emitting device 150 can each be configured independently as a laser diode or a light-emitting diode (LED). The number of light sources 101 per light-emitting device can be one, two, or more. The light-shaping element 102 can be a lens. The orientation of the light source 101 can be directed forwards or inclined at an angle to the ground surface. In some optional embodiments, the first light-emitting device 140 and the second light-emitting device 150, as shown in Fig. 6, each comprise a light source 101 and a control wiring harness 141. The control wiring harness 141 comprises a first section 1411 and a second section. One end of the first section 1411 is attached to the brush cover 122. One end of the first section is electrically connected to the power supply, while one end of the second section is electrically connected to the power supply or the control board. The first section 1411 is installed on the brush cover 122, while the second section is installed on the main housing 121. The brush cover 122 is detachably connected to the main housing 121, with the other end of the first section 1411 being detachably connected to the other end of the second section. When brush cover 122 is connected to the main housing 121, the other end of the first section 1411 is electrically connected to the other end of the second section. When brush cover 122 is detached from the main housing 121, the first section separates from the main housing 121 along with brush cover 122. The control wiring harness 141 is divided into a first section 1411 and a second section. The brush cover 122 can be removed for cleaning, removing cleaning elements, or servicing / replacing the light-emitting device. The first section 1411 and the second section can be separated from each other without tools. For cleaning, the brush cover 122 can be reattached, with the first section 1411 and the second section re-establishing the electrical connection via a plug or similar method, making it more convenient to use. Furthermore, the control cable harness 141 allows the light-emitting device to be powered by the battery in the main unit 300 of the vacuum cleaner. Alternatively, a dedicated battery can be configured for the light-emitting device. This battery can be installed in a more spacious location, for example, in the main housing 121, instead of in the limited space of the brush cover 122. This ensures both a sufficient power supply for the light-emitting device and a more efficient arrangement. One end of the first section 1411 can be directly electrically connected to the power supply or the control board, or to both simultaneously. The power supply provides current to the light-emitting device, while the control board is used, at least, to control the activation or deactivation of the light-emitting device. In some optional embodiments, the light source 101 comprises a dust-detecting light source 101 that can emit green or blue light, and a sterilizing light source 101 that can emit ultraviolet light. Alternatively, one of the two light-emitting devices is the dust-detecting light source 101, while the other is the sterilizing light source 101. The dust-detecting light source 101, which emits green or blue light, has a superior dust-detecting effect. The sterilizing light source 101 also has a certain dust-detecting effect, but additionally offers a sterilizing effect by disinfecting the floor surface and thereby reducing odors that arise during the cleaning process. Without contradiction, different embodiments of the present disclosure or different technical features can be combined arbitrarily to form new embodiments. It is understood that the embodiments mentioned above are exemplary and are not intended to encompass all possible embodiments covered by the claims. Without deviating from the scope of this disclosure, various modifications and alterations may be made based on the embodiments mentioned above. Likewise, the various technical features of the embodiments mentioned above may be combined in any way to form additional embodiments of the present utility model, which may not be expressly described. Therefore, the embodiments mentioned above merely express several implementation methods of the present utility model and do not limit the scope of protection of the present utility model patent.

Claims

Floor brush, characterized in that the floor brush (100) comprises: a floor brush body (120) comprising a receiving cavity for receiving cleaning elements; a first light-emitting device (140) and a second light-emitting device (150), wherein the first light-emitting device (140) and the second light-emitting device (150) are each attached to the front and rear of the floor brush body (120), respectively; and wherein the floor brush body (120) is oriented transversely perpendicular to the direction of the forward and backward movement of the floor brush body (120) on the surface to be cleaned; and wherein the second light-emitting device (150) is in a light-emitting state during the forward movement of the floor brush body (120). floor brush according to claim 1, characterized in that the first light-emitting device (140) and the second light-emitting device (150) are located between the two opposite ends of the floor brush body (120) in the transverse direction. floor brush according to claim 1, characterized in that the first light-emitting device (140) and the second light-emitting device (150) are each located at the intermediate position of the floor brush body (120) in the transverse direction. Floor brush according to claim 1, characterized in that the vertical distance between the central position of the light beam emitted by the first light-emitting device (140) and the surface to be cleaned and the vertical distance between the central position of the light beam emitted by the second light-emitting device (150) and the surface to be cleaned are both less than or equal to 10 mm. Floor brush according to claim 1, characterized in that the cleaning element comprises a roller brush (110), wherein the angle between the vertical line connecting the central position of the light beam emitted by the first light-emitting device (140) with the axis of the roller brush (110) and the horizontal plane, and the angle between the vertical line connecting the central position of the light beam emitted by the second light-emitting device (150) with the axis of the roller brush (110) and the horizontal plane, are each between -45° and 45°. Floor brush according to claim 1, characterized in that the vertical projection of the first light-emitting device (140) and / or the second light-emitting device (150) onto the horizontal plane lies within the vertical projection area of ​​the floor brush body onto the horizontal plane, wherein the vertical projection of the first light-emitting device (140) and / or the second light-emitting device (150) onto a predetermined vertical surface lies within the vertical projection area of ​​the floor brush body (120) onto the predetermined vertical surface; and wherein the predetermined vertical surface is aligned parallel to the transverse direction of the cleaning element and perpendicular to the horizontal plane. Floor brush according to claim 1, characterized in that during the backward movement of the floor brush body (120) the first light-emitting device (140) is in a light-emitting state; or that during the forward or backward movement of the floor brush body (120) both the first light-emitting device (140) and the second light-emitting device (150) are in a light-emitting state. Floor brush according to claim 1 or 4, characterized in that the floor brush comprises a detection device which is electrically connected to the control board, wherein the detection device is installed on the floor brush body (120), and wherein the detection device is electrically connected to the first light-emitting device (140) and the second light-emitting device (150) respectively; and wherein the detection device is configured to detect the direction of movement of the floor brush body (120) and outputs a direction of movement signal to the control board, and wherein the control board is configured to control the first light-emitting device (140) and the second light-emitting device (150) when triggered by the direction of movement signal, such that one of them lights up or the two light up synchronously. Floor brush according to claim 1, characterized in that the floor brush body (120) comprises: a main housing (121) wherein the cleaning element is rotatably connected to the main housing (121); a brush cover (122) which is connected to the main housing (121) and covers the cleaning element, wherein at least one of the first light-emitting device (140) and the second light-emitting device (150) is installed on the brush cover (122). Floor brush according to claim 9, characterized in that at least one of the first light-emitting device (140) and the second light-emitting device (150) is installed on an outer wall of the brush cover (122) facing away from the receiving cavity; or that the brush cover (122) is provided with a light-emitting opening, wherein at least one of the first light-emitting device (140) and the second light-emitting device (150) is located in the receiving cavity and is installed on an inner wall of the brush cover (122) facing the receiving cavity, and wherein the light emitted by the first light-emitting device (140) and the second light-emitting device (150) passes through the light-emitting opening to illuminate the surface to be cleaned;or that the brush cover (122) comprises at least two superimposed layers of cover bodies (1221), wherein at least one of the first light-emitting device (140) and the second light-emitting device (150) is arranged between the two layers of cover bodies (1221). Floor brush according to claim 10, characterized in that the first light-emitting device (140) and the second light-emitting device (150) each comprise a light source (101) and a light-shaping element (102), wherein the light-shaping element (102) is configured to receive the light beam emitted by the light source (101) and direct it to the surface to be cleaned, so that the light-shadow area illuminated by the light source (101) forms a sector area on the surface to be cleaned; wherein the edges of the two ends of the floor brush body (120) are located in the transverse direction within the sector area, or wherein the edges of the two ends of the floor brush body (120) are located in the transverse direction outside the sector area and are less than 20 mm away from the boundaries of the sector area. Floor brush according to claim 11, characterized in that the angle of the sector area is 80°. Floor brush according to claim 9, characterized in that the first light-emitting device (140) and the second light-emitting device (150) each comprise a light source (101) and a control cable harness (141), wherein the control cable harness (141) comprises a first section (1411) and a second section, and wherein one end of the first section (1411) is electrically connected to the light source (101), while one end of the second section is electrically connected to the power supply and / or the control board; and wherein the first section (1411) is installed on the brush cover (122), while the second section is installed on the main housing (121); and wherein the brush cover (122) is detachably connected to the main housing (121), and wherein the other end of the first section (1411) is detachably connected to the other end of the second section. floor brush according to claim 13, characterized in that the light source (101) comprises a dust-detecting light source (101) that can emit green or blue light, and / or a sterilizing light source (101) that can emit ultraviolet light. Cleaning device characterized in that it comprises a floor brush according to one of claims 1 to 14.

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