Surface cleaning device with floating scraping assembly

Abstract

The utility model discloses a surface cleaning device with a floating scraping component, which belongs to the technical field of cleaning equipment and comprises a floor brush provided with a rolling brush component, the floor brush comprises a floor brush main body and a front cover which are matched to form a mounting cavity, the rolling brush component is arranged in the mounting cavity, the floor brush further comprises a scraping component movably arranged on the front cover, and the scraping component is movably arranged on the front cover. The rolling brush assembly and / or the floor brush body are / is provided with a trigger part, the front cover is detachably installed on the floor brush body, and the scraping assembly can be driven by the trigger part to move, so that the scraping assembly has an extending state in which the scraping assembly abuts against the rolling brush assembly or an avoiding state in which the scraping assembly is separated from the rolling brush assembly. Through improvement, the state of the scraping assembly can be matched with the type of the rolling brush assembly, noise generated when the bristles are scraped and squeezed by the scraping assembly is avoided, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a surface cleaning device with a floating scraping component. Background Art

[0002] Traditional handheld surface cleaners are mainly used to clean hard surfaces to be cleaned, such as tiles and wooden floors. In order to ensure the cleaning effect, the handheld surface cleaner is provided with a liquid supply component, a scraper and a dirt suction component. The liquid supply component provides cleaning liquid to the roller brush component so that the fluff of the roller brush component can absorb the liquid and wet it and then wipe the surface to be cleaned. The fixed scraper scrapes and squeezes the fluff of the roller brush assembly, and the scraped and squeezed dirt is sucked into the sewage bucket of the dirt suction component.

[0003] In order to enable the handheld surface cleaner to clean flexible surfaces to be cleaned, such as carpets, some existing handheld surface cleaners are also equipped with a carpet roller brush with hard bristles, the bristles of which can be inserted into the carpet and patted during cleaning. Since the bristles of the carpet roller brush are relatively hard, noise will be generated when the scraping member contacts the bristles, which is not conducive to ensuring the user experience. In addition, since the scraping member extends into the root of the bristles, the scraping member will cause the bristles to be subjected to a large force when scraping and squeezing the bristles, and since the scraping member scrapes and squeezes the bristles at a high frequency when the carpet roller brush is working, the bristles are prone to loosening or wear after a period of scraping and squeezing, which is not conducive to ensuring the structural stability of the bristles, and thus is not conducive to ensuring the service life and cleaning effect of the carpet roller brush.

[0004] Therefore, in order to enable the handheld surface cleaner to clean the floor and the carpet at the same time, a movable scraper is provided on the floor brush, so that the scraper has a first position where it can abut against the floor roller brush and a second position where it is separated from the carpet roller brush. However, the movable scraper provided on the floor brush needs to be sealed with the floor brush body, and the structure of making the scraper movable while preventing water from entering the floor brush body is relatively complicated. On the other hand, the movable scraper provided on the floor brush body is partly dirty and easily stuck between the floor brush and the scraper during the extension and retraction process, making it difficult to clean. Utility Model Content

[0005] In order to solve the shortcomings and deficiencies in the above-mentioned prior art, the utility model provides a surface cleaning device with a floating scraping assembly, so that the state of the scraping assembly can be adapted to the type of the roller brush assembly, avoiding the noise generated by the bristles being scraped by the scraping assembly, thereby improving the user experience.

[0006] In order to achieve the above-mentioned technical objectives, the utility model provides a surface cleaning device with a floating scraping assembly, including a floor brush provided with a roller brush assembly, the floor brush including a floor brush body and a front cover that cooperate to form an installation cavity, the roller brush assembly is arranged in the installation cavity, the floor brush also includes a scraping assembly movably arranged on the front cover, the roller brush assembly and / or the floor brush body is provided with a trigger part, the front cover is detachably mounted on the floor brush body and the scraping assembly can be driven to move by the trigger part, so that the scraping assembly has an extended state that conflicts with the roller brush assembly or an evasive state that is separated from the roller brush assembly.

[0007] Preferably, the roller brush assembly includes a first roller brush assembly and a second roller brush assembly which can be selectively installed on a floor brush, wherein the first roller brush assembly is installed on the floor brush so that the scraping assembly has an extended state that interferes with the first roller brush assembly, and the second roller brush assembly is installed on the floor brush so that the scraping assembly has an evasive state that is separated from the second roller brush assembly.

[0008] Preferably, the front cover is provided with a first linkage part linked with the scraping assembly at one end facing the roller brush assembly, and the trigger part comprises a first protrusion provided on the first roller brush assembly, and the first protrusion cooperates with the first linkage part to switch the scraping assembly from the avoidance state to the extension state;

[0009] Alternatively, the front cover is provided with a first linkage portion linked to the scraping assembly at one end facing the roller brush assembly, and the trigger portion includes a first protrusion provided on the second roller brush assembly, and the first protrusion cooperates with the first linkage portion to switch the scraping assembly from the extended state to the avoidance state.

[0010] Preferably, the floor brush body is provided with a transmission head which is transmission-connected to the roller brush assembly, the floor brush body is provided with a support plate at one end close to the transmission head, the front cover is provided with a second linkage part which is linked to the scraping assembly at one end facing the support plate, the support plate is provided with a second protrusion which is movably arranged and has a trigger state and a retracted state, the second protrusion in the trigger state can cooperate with the second linkage part, and the second protrusion in the retracted state is disengaged from the second linkage part.

[0011] Preferably, the roller brush assembly includes a first roller brush assembly and a second roller brush assembly which can be selectively installed on the floor brush, the first roller brush assembly includes a first roller body and a cleaning layer arranged on the outer periphery of the first roller body, the second roller brush assembly includes a second roller body and bristles arranged on the outer periphery of the second roller body, the outer diameter of the first roller body is larger than the outer diameter of the second roller body, and the first roller body causes the second protrusion to switch from a retracted state to a triggered state when the first roller brush assembly is installed on the floor brush.

[0012] Preferably, the trigger part also includes a push block transmission connected to the second protrusion, and the push block can cooperate with the first roller body so that the push block pressed by the first roller body drives the second protrusion to switch from a retracted state to a trigger state; and / or, a first elastic member is provided on the support plate to keep the second protrusion in a retracted state, and the second protrusion switching from the retracted state to the trigger state causes the first elastic member to deform under force.

[0013] Preferably, the floor brush body is further provided with a driving assembly drivingly connected to the trigger part, and the trigger part switches the scraping assembly to an extended state or an evasive state under the action of the driving assembly.

[0014] Preferably, a water dividing member is further provided on the front cover, and the water dividing member is arranged above the scraping assembly and moves with the scraping assembly.

[0015] Preferably, a second elastic member for keeping the scraping assembly in an evasive state or an extended state is provided on the front cover, and the scraping assembly that switches its state causes the second elastic member to be deformed by force.

[0016] Preferably, the scraping assembly can be arranged on the front cover so as to swing back and forth; or, the scraping assembly can be arranged on the front cover so as to slide back and forth.

[0017] After adopting the above technical solution, the utility model has the following advantages:

[0018] 1. The surface cleaning device provided by the utility model has a movable scraping assembly on the front cover, and a trigger part is provided on the roller brush assembly and / or the floor brush body. When the front cover is installed on the floor brush body, the scraping assembly can be driven to move by the trigger part, and the moving scraping assembly switches state, so that the state of the scraping assembly can be adapted to the type of the roller brush assembly. When the roller brush assembly is used for cleaning hard surfaces to be cleaned such as tiles and wooden floors, the scraping assembly is in an extended state. At this time, the scraping assembly conflicts with the roller brush, so that the scraping assembly can effectively scrape and squeeze the roller brush, ensuring the cleaning effect of the roller brush on the hard surface to be cleaned. When the roller brush assembly is used for cleaning flexible surfaces to be cleaned such as carpets, the scraping assembly is in an avoidance state. At this time, the scraping assembly and the roller brush are in a separated state, so that the scraping assembly basically does not contact the bristles on the roller brush, thereby avoiding the noise generated by the bristles being scraped and squeezed by the scraping assembly, which is conducive to improving the user experience. In addition, since the scraping assembly in the avoidance state basically does not contact the bristles, the force on the bristles can be effectively reduced, and the bristles can be prevented from being worn or loosened due to the scraping and squeezing of the scraping assembly, which is conducive to ensuring the structural stability of the bristles, thereby ensuring the cleaning effect of the roller brush assembly. In addition, it can also effectively reduce the driving load of the motor used to drive the roller brush assembly, which is conducive to ensuring the performance stability of the motor. Furthermore, since the scraping assembly is arranged on the front cover, the user can remove the front cover from the floor brush body and clean the scraping assembly, avoiding the situation where dirt is retained on the scraping assembly and causing odor, breeding bacteria, etc., which is conducive to improving the user experience.

[0019] 2. Either the first roller brush assembly or the second roller brush assembly is installed on the floor brush. When the first roller brush assembly is installed on the floor brush, the scraping assembly is in an extended state, and the scraping assembly contacts the roller brush of the first roller brush assembly, so that the scraping assembly can effectively scrape the roller brush of the first roller brush assembly. When the second roller brush assembly is installed on the floor brush, the scraping assembly is in an avoidance state, and the scraping assembly is separated from the roller brush of the second roller brush assembly, so that the scraping assembly basically does not contact the roller brush of the second roller brush assembly. The type of roller brush assembly and the state of the scraping assembly when corresponding to different roller brush assemblies are reasonably set, so that the surface cleaning device can meet the cleaning requirements of different surfaces to be cleaned.

[0020] 3. In one solution, a first linkage part that is linked to the scraping assembly is provided on the front cover, and a first protrusion that serves as a trigger part is provided on the first roller brush assembly. When the front cover cooperates with the first roller brush assembly, the first protrusion cooperates with the first linkage part to switch the scraping assembly from the avoidance state to the extension state, so that the scraping assembly can contact the first roller brush assembly. When the front cover cooperates with the second roller brush assembly, since the trigger part is not provided on the second roller brush assembly, the scraping assembly cannot switch from the avoidance state to the extension state, so that the scraping assembly is separated from the second roller brush assembly. The structure of the roller brush assembly is reasonably set so that the state of the scraping assembly can be adapted to the type of the roller brush assembly.

[0021] In another solution, a first linkage part that is linked to the scraping assembly is provided on the front cover, and a first protrusion that serves as a trigger part is provided on the second roller brush assembly. When the front cover cooperates with the second roller brush assembly, the first protrusion cooperates with the first linkage part to switch the scraping assembly from the extended state to the avoidance state, so that the scraping assembly is separated from the second roller brush assembly. When the front cover cooperates with the first roller brush assembly, since the first roller brush assembly is not provided with a trigger part, the scraping assembly cannot switch from the extended state to the avoidance state, so that the scraping assembly can conflict with the first roller brush assembly. The structure of the roller brush assembly is reasonably set so that the state of the scraping assembly can be adapted to the type of the roller brush assembly.

[0022] 4. A support plate is provided at one end of the floor brush body close to the transmission head, a second linkage part that is linked to the scraping assembly is provided at one end of the front cover facing the support plate, and a second protrusion is provided on the support plate. When the second protrusion is in a triggered state, the second protrusion can cooperate with the second linkage part when the front cover is installed on the floor brush body, so that the scraping assembly on the front cover switches state. When the second protrusion is in a retracted state, the second protrusion cannot cooperate with the second linkage part when the front cover is installed on the floor brush body, so that the scraping assembly on the front cover cannot switch state. The structure of the floor brush body is reasonably set so that the scraping assembly can switch state according to the situation when the front cover is installed on the floor brush body, so that the state of the scraping assembly can be adapted to the type of the roller brush assembly.

[0023] 5. The first roller brush assembly includes a first roller body and a cleaning layer disposed on the outer periphery of the first roller body, and the second roller brush assembly includes a second roller body and a cleaning layer disposed on the outer periphery of the first roller body, and the outer diameter of the first roller body is greater than the outer diameter of the second roller body. When the first roller brush assembly is installed on the floor brush body, the first roller body switches the second protrusion from the retracted state to the triggered state, and the second protrusion in the triggered state cooperates with the second linkage part when the front cover is installed on the floor brush body to switch the scraping assembly from the avoidance state to the extended state, so that the scraping assembly can collide with the roller brush of the first roller brush assembly. When the second roller brush assembly is installed on the floor brush body, the second roller body cannot switch the second protrusion from the retracted state to the triggered state, and the second protrusion is still in the retracted state. When the front cover is installed on the floor brush body, the second protrusion in the retracted state cannot cooperate with the second linkage part to switch the scraping assembly from the avoidance state to the extended state, and the scraping assembly is still in the avoidance state, so that the scraping assembly is separated from the roller brush of the second roller brush assembly. The matching structure between the second protrusion and the roller brush assembly is reasonably arranged so that the state of the scraping assembly can be adapted to the type of the roller brush assembly.

[0024] 6. The triggering part also includes a push block that is transmission-connected to the second protrusion. When the first roller brush assembly is installed on the floor brush body, the first roller body presses the push block, and the push block pressed by the first roller body moves under force, and the moving push block drives the second protrusion to switch from the retracted state to the trigger state. The matching structure between the first roller body and the second protrusion is reasonably set so that the second protrusion can smoothly switch its state.

[0025] A first elastic member is provided on the support plate, and the second protrusion is kept in a retracted state under normal conditions by means of the first elastic member. When the first roller body switches the second protrusion from the retracted state to the triggered state, the first elastic member is deformed by force. When the first roller brush assembly is detached from the floor brush body, the first elastic member that restores the deformation drives the second protrusion to return from the triggered state to the retracted state. When the second roller brush assembly is installed on the floor brush body, the second protrusion remains in the retracted state under the action of the first elastic member, and the second protrusion in the retracted state cannot cooperate with the second linkage part to switch the scraping assembly from the avoidance state to the extended state, so that the scraping assembly can remain in the avoidance state when the second roller brush assembly is used for cleaning.

[0026] 7. In another solution, a driving assembly connected to the trigger part is provided on the floor brush body. The driving assembly can switch the scraping assembly between the extended state and the avoidance state by cooperating with the trigger part according to the type of the roller brush assembly, so that the state of the scraping assembly can be adapted to the type of the roller brush assembly.

[0027] 8. The front cover is provided with a water-dividing member, which is provided above the scraping assembly and moves with the scraping assembly. When the roller brush assembly adopts a first roller brush assembly for cleaning hard surfaces to be cleaned such as tiles and wooden floors, the water-dividing member needs to provide cleaning liquid to the roller brush of the first roller brush assembly. At this time, the distance between the water-dividing member and the roller brush of the first roller brush assembly is small, and the cleaning liquid flowing out of the water-dividing member can be absorbed by the roller brush of the first roller brush assembly as soon as possible, thereby preventing the cleaning liquid from dripping on the surface to be cleaned due to failure to be absorbed by the roller brush of the first roller brush assembly in time. When the roller brush assembly adopts a second roller brush assembly for cleaning flexible surfaces to be cleaned such as carpets, the water-dividing member does not need to provide cleaning liquid to the roller brush of the second roller brush assembly. At this time, the distance between the water-dividing member and the roller brush of the second roller brush assembly is large, which can reduce the rotation obstruction of the roller brush of the second roller brush assembly caused by the water-dividing member, ensure the smoothness of rotation of the roller brush of the second roller brush assembly, and help improve the cleaning effect of the second roller brush assembly.

[0028] 9. A second elastic member is provided on the front cover, and the scraping assembly is kept in an evasive state or an extended state by the second elastic member. When the scraping assembly switches state under the drive of the trigger part, the second elastic member is deformed by force. When the scraping assembly is separated from the trigger part, the second elastic member that restores the deformation drives the scraping assembly to return to its original state. The structure that cooperates with the scraping assembly is reasonably set so that the state of the scraping assembly can be adapted to the type of the roller brush assembly.

[0029] 10. The scraping assembly can be set to swing. At this time, the swing center line of the scraping assembly is parallel to the central axis of the roller brush assembly. The scraping assembly swinging forward switches to the extended state, and the scraping assembly swinging backward switches to the avoidance state. The scraping assembly can also be set to slide. At this time, the scraping assembly sliding from back to front switches to the extended state, and the scraping assembly sliding from front to back switches to the separated state. The movable installation method of the scraping assembly on the front cover is reasonably set so that the scraping assembly can smoothly switch between the extended state and the avoidance state. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a diagram of the entire surface cleaning device of Example 1;

[0031] Figure 2 An exploded view of a floor brush in a surface cleaning device in Example 1;

[0032] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0033] Figure 4 An exploded view of a water distribution component and a scraping component in a surface cleaning device in Example 1;

[0034] Figure 5 A cross-sectional view of the middle of the surface cleaning device and the scraping assembly along the front-to-back direction of the first embodiment;

[0035] Figure 6 It is a partial structural diagram of the floor brush in the surface cleaning device of Example 1 when the first roller brush assembly is not installed in place;

[0036] Figure 7 It is a partial structural diagram of the floor brush in the surface cleaning device of Example 1 when the first roller brush assembly is installed in place;

[0037] Figure 8 It is a partial structural diagram of the floor brush in the surface cleaning device of Example 1 when the second roller brush assembly is not installed in place;

[0038] Fig. 9 It is a partial structural diagram of the floor brush in the surface cleaning device of embodiment 1 when the scraping assembly is in an extended state;

[0039] Fig.10 It is a partial structural diagram of the floor brush in the surface cleaning device of the first embodiment when the scraping assembly is in the avoidance state;

[0040] Fig.11 It is a schematic structural diagram of a liquid supply assembly in a surface cleaning device in Example 1;

[0041] Fig.12 An exploded view of a floor brush in a surface cleaning device of Embodiment 2;

[0042] Fig.13 An exploded view of a floor brush in a surface cleaning device in Example 3;

[0043] Fig.14 It is a partial structural diagram of the floor brush in the surface cleaning device of the fourth embodiment when the scraping assembly is in the extended state;

[0044] Fig.15 An exploded view of a floor brush in a surface cleaning device in Embodiment 4;

[0045] Fig.16 It is a partial structural diagram of the floor brush in the surface cleaning device of Example 6 when the scraping assembly is in an avoidance state.

[0046] In the picture, 10- floor brush,

[0047] 100-roller brush assembly, 100a-first roller brush assembly, 110a-first roller brush, 111a-first roller body, 112a-cleaning layer, 120a-first side plate, 100b-second roller brush assembly, 110b-second roller brush, 111b-second roller body, 112b-brush hair, 120b-second side plate,

[0048] 210-floor brush body, 220-front cover, 230-installation cavity, 240-sewage suction port, 250-support plate, 251-positioning block, 252-convex column,

[0049] 300-scraping assembly, 310-scraping strip, 311-scraping part, 320-comb teeth, 321-convex teeth, 330-bracket, 340-first linkage part, 350-second linkage part, 360-insertion hole, 370-long hole, 380-limiting hole, 390-second elastic member,

[0050] 400-trigger part, 410-first protrusion, 420-second protrusion, 421-slide groove, 422-inclined surface, 430-first elastic member, 440-push block, 441-push surface, 442-concave hole,

[0051] 500-Power assembly,

[0052] 600-driving assembly, 610-actuating member, 620-connecting member,

[0053] 20-body, 201-handle,

[0054] 30-liquid supply assembly, 31-clean water tank, 32-water pump, 33-water distribution part, 3301-water outlet, 3302-stud, 3303-limiting column, 34-heating part,

[0055] 40-sewage suction component, 41-sewage bucket, 42-fan,

[0056] 50-Control module. DETAILED DESCRIPTION

[0057] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0058] Embodiment 1

[0059] Combination Figures 1 to 11The first embodiment of the utility model provides a surface cleaning device with a floating scraping assembly, comprising a floor brush 10 provided with a roller brush assembly 100, the floor brush 10 comprising a floor brush body 210 and a front cover 220 which cooperate to form a mounting cavity 230, and the roller brush assembly 100 is disposed in the mounting cavity 230. The floor brush 10 also comprises a scraping assembly 300 movably disposed on the front cover 220, the roller brush assembly 100 and / or the floor brush body 210 are provided with a triggering portion 400, the front cover 220 is detachably mounted on the floor brush body 210 and the scraping assembly 300 can be driven to move by the triggering portion 400, so that the scraping assembly 300 has an extended state that conflicts with the roller brush assembly 100 or an evasive state that is separated from the roller brush assembly 100.

[0060] The structure of the scraping assembly 300 is reasonably set so that the state of the scraping assembly 300 can be adapted to the type of the roller brush assembly 100, thereby avoiding the noise generated by the scraping of the scraping assembly 300 on the bristles, and improving the user experience. In addition, it can also avoid the bristles from being worn or loosened due to the scraping of the scraping assembly 300, which is conducive to ensuring the structural stability of the bristles. Furthermore, the user can remove the front cover 220 from the floor brush body 210 and clean the scraping assembly 300, thereby avoiding the situation where dirt is retained on the scraping assembly 300 and causes odor, bacteria, etc., which is conducive to improving the user experience.

[0061] Combination Figure 1 The surface cleaning device of this embodiment further includes a body 20, the lower end of the body 20 is pivotally connected to the rear side of the floor brush body 210, the upper end of the body 20 is provided with a handle 201, and the floor brush 10 is provided with a roller. When in use, the user can push and pull the body 20 through the handle 201, and the pushed and pulled body 20 drives the floor brush 10 to move on the surface to be cleaned. The front cover 220 is detachably mounted on the front side of the floor brush body 210 through a locking structure. When the front cover 220 is mounted on the front side of the floor brush body 210, the two cooperate to form an installation cavity 230.

[0062] Combination Figure 2 The roller brush assembly 100 includes a first roller brush assembly 100a and a second roller brush assembly 100b which can be selectively installed on the floor brush 10. The first roller brush assembly 100a includes a first roller brush 110a and a first side plate 120a provided at one end of the first roller brush 110a. The axial direction of the first roller brush 110a is substantially perpendicular to the plane direction of the first side plate 120a. The second roller brush assembly 100b includes a second roller brush 110b and a second side plate 120b provided at one end of the second roller brush 110b. The axial direction of the second roller brush 110b is substantially perpendicular to the plane direction of the second side plate 120b. Specifically, the first roller brush assembly 100a is used to clean hard surfaces to be cleaned, such as tiles and wooden floors. Figure 6 , Figure 7The first roller brush 110a includes a first roller body 111a and a cleaning layer 112a disposed on the outer peripheral surface of the first roller body 111a. The cleaning layer 112a can be made of cotton fluff or cotton cloth or other materials with strong water absorption capacity. Figure 8 The second roller brush assembly 100b is used to clean a flexible surface to be cleaned, such as a carpet. The second roller brush 110b includes a second roller body 111b and bristles 112b arranged on the outer peripheral surface of the second roller body 111b. The bristles 112b are arranged in clusters and planted on the second roller body 111b at intervals. The bristles 112b can be made of nylon, plastic, and other materials. The floor brush body 210 is provided with a support plate 250 arranged opposite to the side plate. When the roller brush assembly 100 is installed on the floor brush body 210, the axial direction of the roller brush 110 is basically arranged along the left and right directions. The side plate and the support plate 250 are respectively arranged on the left and right sides of the floor brush 10. Through the cooperation of the front cover 220, the floor brush body 210, the side plate 120 and the support plate 250, the installation cavity 230 is only open on the bottom side.

[0063] Combination Figure 5 In this embodiment, the scraping assembly 300 includes a scraping strip 310 and comb teeth 320 arranged vertically. The front end of the scraping strip 310 is provided with a scraping and squeezing portion 311, and the front end of the comb teeth 320 is provided with a plurality of convex teeth 321 spaced apart in the left-right direction. When the scraping assembly 300 is in the extended state, the scraping and squeezing portion 311 at the front end of the scraping strip 310 and the convex teeth 321 at the front end of the comb teeth 320 both contact with the cleaning layer 112a of the first roller brush 110a, and the convex teeth 321 can extend into the fluff of the cleaning layer 112a. When the first roller brush 110a rotates, the comb teeth 320 comb the cleaning layer 112a first, and then the scraping and squeezing portion 311 of the scraping strip 310 scrapes and squeezes the cleaning layer 112a. When the scraping assembly 300 is in the avoidance state, the scraping portion 311 at the front end of the scraping strip 310 and the protruding teeth 321 at the front end of the comb teeth 320 are separated from the second roller brush 110b, and the scraping portion 311 and the protruding teeth 321 basically do not contact the bristles 112b on the second roller brush 110b, thereby avoiding the noise generated by the bristles 112b being squeezed by the scraping assembly 300 when passing through the scraping assembly 300. As an alternative to this embodiment, the scraping assembly 300 may also be provided with only the scraping strip 310 or only the comb teeth 320.

[0064] In order to ensure the cleaning effect of the first roller brush 110a on the hard surface to be cleaned, the surface cleaning device of this embodiment is further provided with a liquid supply component 30. Fig.11The liquid supply component 30 includes a clean water tank 31, a water pump 32 and a water distribution member 33 which are sequentially distributed from upstream to downstream through a pipeline structure. The clean water tank 31 can be detachably mounted on the machine body 20 or the floor brush 10. The water pump 32 is disposed in the floor brush body 210. The water distribution member 33 is provided with a water outlet 3301 disposed toward the roller brush 110. The water pump 32 pumps the cleaning liquid in the clean water tank 31 to the water distribution member 33. The cleaning liquid flowing into the water distribution member 33 is finally sprayed from the water outlet 3301 onto the first roller brush 110a. The cleaning layer 112a of the first roller brush 110a absorbs the liquid and becomes wet, so that the first roller brush 110a can wet-wipe the hard surface to be cleaned. As a preferred solution of this embodiment, the water distribution member 33 can adopt the prior art method of connecting a water inlet channel according to 2 N As an optional solution of this embodiment, the liquid supply component 30 can also be provided with a heating element 34 between the downstream of the water pump 32 and the upstream of the water distribution element 33, and the heating element 34 can heat the cleaning liquid flowing through, so as to further improve the cleaning effect of the first roller brush 110a on the hard surface to be cleaned.

[0065] When the second roller brush assembly 100b is used to clean the flexible surface to be cleaned, it is generally not necessary for the liquid supply assembly 30 to supply liquid to the second roller brush 110b. Based on this, a magnet can be set on the first roller brush assembly 100a or the second roller brush assembly 100b, and a magnetic induction switch that can be triggered by the magnet can be set on the floor brush body 210. The magnetic induction switch is electrically connected to and / or signal-connected to the control module 50. Through the cooperation of the magnet and the magnetic induction switch, the control module 50 can identify whether the first roller brush assembly 100a or the second roller brush assembly 100b is installed on the floor brush 10. When the first roller brush assembly 100a is installed, the liquid supply assembly 30 is defaulted to provide cleaning liquid to the first roller brush 110a during the operation of the device. When the second roller brush assembly 100b is installed, the liquid supply assembly 30 is defaulted to not provide cleaning liquid to the second roller brush 110b during the operation of the device. The user can manually press the liquid supply button according to the cleaning needs to make the liquid supply assembly 30 provide cleaning liquid to the second roller brush 110b.

[0066] Combination Fig. 9The floor brush body 210 is provided with a dirt suction port 240. The surface cleaning device of this embodiment also includes a dirt suction assembly 40. The dirt suction assembly 40 includes a sewage bucket 41 for collecting dirt and a fan 42 for providing suction. The fan 42 provides suction to form a dirt suction airflow from the dirt suction port 240 to the sewage bucket 41. The dirt scraped off by the first roller brush 110a by the scraping assembly 300 and the dirt lifted or attached by the second roller brush 110b can be sucked into the sewage bucket 41 through the dirt suction port 240, thereby achieving dirt collection. As a feasible solution of this embodiment, the fan 42 can be directly arranged inside the fuselage 20, and the fan 42 can also be used as a component of the suction power source assembly. The suction power source assembly can be detachably installed on the fuselage 20. The suction power source assembly detached from the fuselage 20 can be connected to a dust collection accessory for dry dust collection.

[0067] In this embodiment, the water diversion component 33 is arranged at the bottom of the front cover 220, and a water channel transfer matching structure is provided between the front cover 220 and the floor brush body 210. When the front cover 220 is installed on the floor brush body 210, the water diversion component 33 is connected to the pipeline structure of the liquid supply component 30 through the water channel transfer matching structure, so that the cleaning liquid can flow smoothly to the water diversion component 33.

[0068] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5In this embodiment, the scraping assembly 300 is swingably disposed at the bottom of the front cover 220, and the scraping assembly 300 is located below the water dividing member 33. The front cover 220 is provided with a first linkage portion 340 linked with the scraping assembly 300 at one end facing the side plate, and the front cover 220 is provided with a second linkage portion 350 linked with the scraping assembly 300 at one end facing the support plate 250. The triggering portion 400 includes a first protrusion 410 disposed on the first roller brush assembly 100a and a second protrusion 420 disposed on the support plate 250, wherein the second protrusion 420 has a trigger state and a retracted state. The scraping assembly 300 is in an avoidance state under normal circumstances, and the second protrusion 420 is in a retracted state under normal circumstances. When the first roller brush assembly 100a is installed on the floor brush body 210, the second protrusion 420 switches from the retracted state to the trigger state. When the front cover 220 is installed on the floor brush body 210, the first linkage part 340 cooperates with the first protrusion 410 and the second linkage part 350 cooperates with the second protrusion 420 in the trigger state. The scraping assembly 300 is forced to swing and switch from the avoidance state to the extended state, so that the scraping part 311 of the scraper strip 310 and the protruding teeth 321 of the comb teeth 320 can conflict with the cleaning layer 112a of the first roller brush 110a. When the second roller brush assembly 100b is installed on the floor brush body 210, the second protrusion 420 is still in a retracted state, and since the second roller brush assembly 100b is not provided with the first protrusion 410, when the front cover 220 is installed on the floor brush body 210, the first linkage part 340 and the second linkage part 350 cannot be triggered by the trigger part 400, and the scraping assembly 300 remains in an avoidance state, so that the scraping part 311 of the scraping strip 310 and the convex teeth 321 of the comb teeth 320 basically do not contact the bristles 112b of the second roller brush 110b.

[0069] Specifically in this embodiment, the left and right ends of the scraping assembly 300 are both provided with brackets 330 extending upwards, the first linkage part 340 extends from the top of the left bracket 330 to the left to form the front cover 220, and the second linkage part 350 extends from the top of the right bracket 330 to the right to form the front cover 220, and the first linkage part 340 and the second linkage part 350 are both provided with plug holes 360. The first protrusion 410 is provided on the first side plate 120a of the first roller brush assembly 100a, and the first protrusion 410 protrudes upwards by a certain height relative to the upper edge of the first side plate 120a. Figure 6 , Figure 7 , Figure 8The second protrusion 420 is movable up and down and is disposed on the top of the support plate 250. The support plate 250 is provided with a first elastic member 430 that keeps the second protrusion 420 in the retracted state. The second protrusion 420 switches from the retracted state to the triggered state, causing the first elastic member 430 to deform under force. In order to enable the second protrusion 420 to switch states according to the type of the roller brush, the triggering part 400 further includes a push block 440 disposed on the support plate 250 and drivingly connected to the second protrusion 420. The push block 440 can cooperate with the first roller body 111a. The push block 440 pressed by the first roller body 111a drives the second protrusion 420 to switch from the retracted state to the triggered state. Specifically, the second protrusion 420 is provided with a slide groove 421 extending up and down, the support plate 250 is provided with a positioning block 251 extending into the slide groove 421, the first elastic member 430 is provided between the positioning block 251 and the bottom side groove wall of the slide groove 421, and the first elastic member 430 applies a downward force to the second protrusion 420, that is, the first elastic member 430 biases the second protrusion 420 downward so that the second protrusion 420 is in a retracted state under normal conditions. The push block 440 is slidably provided on the upper part of the support plate 250, and the push block 440 is provided below the second protrusion 420, and a part of the push block 440 protrudes toward the center of the floor brush body 210 relative to the support plate 250, and the top side of the push block 440 is provided with an inclined push surface 441, and the bottom side of the second protrusion 420 is provided with an inclined surface 422 parallel to the push surface 441, and the push surface 441 is in contact with the inclined surface 422. The outer diameter D1 of the first roller body 111a is greater than the outer diameter D2 of the second roller body 111b. Figure 6 , Figure 7 Since the outer diameter D1 of the first roller body 111a is relatively large, when the first roller brush assembly 100a is installed on the floor brush body 210, the first roller body 111a can contact the push block 440 to make the push block 440 slide toward the support plate 250. The push block 440 sliding toward the support plate 250 makes the second protrusion 420 overcome the bias of the first elastic member 430 and move upward through the contact between the push surface 441 and the inclined surface 422. The second protrusion 420 moving upward switches from the retracted state to the extended state. The first elastic member 430 is deformed by force during this process. The second protrusion 420 switched to the extended state protrudes a certain height relative to the upper edge of the support plate 250. Preferably, the second protrusion 420 switched to the extended state is arranged at approximately the same height as the first protrusion 410 on the first side plate 120a. Figure 8, since the outer diameter D2 of the second roller body 111b is small, when the second roller brush assembly 100b is installed on the floor brush body 210, the second roller body 111b cannot press the push block 440 to make the push block 440 slide toward the support plate 250, so that the push block 440 cannot drive the second protrusion 420 to overcome the bias of the first elastic member 430 and move upward from the retracted state to the trigger state. As an alternative to this embodiment, the push surface 441 on the top side of the push block 440 and the inclined surface 422 on the bottom side of the second protrusion 420 can also be set selectively. As a feasible solution of this embodiment, the first elastic member 430 can be a spring, a spring sheet, or other elastic and elastically deformable component. As an optional solution of this embodiment, the scraper strip 310 and the comb teeth 320 can be separately formed and fixed together, and the bracket 330 can be integrally formed with the scraper strip 310 or the comb teeth 320.

[0070] In this embodiment, in order to ensure the structural stability of the push block 440, the support plate 250 is provided with a convex column 252 protruding toward the center of the floor brush body 210, and the push block 440 is provided with a concave hole 442 on the side facing the support plate 250. The convex column 252 is inserted into the concave hole 442 to limit the push block 440, so that the push block 440 can only slide left and right relative to the support plate 250 when subjected to force.

[0071] In this embodiment, the floor brush body 210 is further provided with a power assembly 500 for driving the roller brush 110. The power assembly 500 is hinged or fixedly connected to the side of the support plate 250 facing the center of the floor brush body 210. When the roller brush assembly 100 is installed on the floor brush body 210, the power assembly 500 is accommodated in the roller body of the roller brush, and the central axis of the roller brush roughly coincides with the central axis of the power assembly 500. When the device is working, the power assembly 500 drives the roller brush to rotate around the central axis L in the direction indicated by ω. The minimum distance E between the push block 440 and the central axis L is slightly smaller than the half R1 of the first roller body 111a, and slightly larger than the radius R2 of the second roller body 111b. Therefore, the first roller body 111a can contact the push block 440 when the first roller brush assembly 100a is installed on the floor brush body 210, and the second roller body 111b cannot contact the push block 440 when the second roller brush assembly 100b is installed on the floor brush body 210. As a specific solution of this embodiment, the power assembly 500 includes a motor and a transmission structure. A transmission hole that cooperates with the transmission structure is provided in the roller body. When the power assembly 500 is accommodated in the roller body, the transmission structure cooperates with the transmission hole, and the working motor drives the roller brush 110 to rotate through the cooperation between the transmission structure and the transmission hole. As an alternative to this embodiment, the power assembly 500 can also be arranged in the floor brush body 210. In this case, the power output member of the power assembly 500 is arranged on the support plate 250. When the roller brush assembly is installed on the floor brush body 210, the power output member is inserted into the transmission hole at the end of the roller brush.

[0072] Combination Figure 4In this embodiment, the scraper assembly 300 is movably connected to the water diversion member 33. Specifically, the top side of the bracket 330 is hinged to the front cover 220. The scraper assembly 300 is provided with a long hole 370 and a limiting hole 380 extending forward and backward. The long holes 370 and the limiting holes 380 are provided with a plurality of intervals in the left and right directions and the two are staggered in the left and right directions. The bottom of the water diversion member 33 is provided with a stud 3302 and a limiting column 3303 both protruding downward. The stud 3302 is inserted into the long hole 370 and connected with a screw. The outer diameter of the screw head is larger than the hole diameter of the long hole 370. The limiting column 3303 is inserted into the limiting hole 380. In order to ensure the stability of the state of the scraper assembly 300, the front cover 220 is provided with a second elastic member 390 to keep the scraper assembly 300 in the avoidance state or the extended state. Specifically, the second elastic member 390 is arranged in the limiting hole 380 and is located between the limiting column 3303 and the hole wall at the rear end of the limiting hole 380. The second elastic member 390 is in a compressed state and applies a backward force to the scraping assembly 300, so that the second elastic member 390 biases the scraping assembly 300 backward. The scraping assembly 300 biased by the second elastic member 390 is in an avoidance state under normal conditions. When the scraping assembly 300 switches from the avoidance state to the extended state, the second elastic member 390 is deformed by force. When the trigger part 400 releases the first linkage part 340 and the second linkage part 350, the second elastic member 390 that restores the deformation drives the scraping assembly 300 to reset from the extended state to the avoidance state. As a feasible solution of this embodiment, the second elastic member 390 can be a spring, a spring sheet, or other elastic member that can be elastically deformed.

[0073] When the front cover 220 is installed on the floor brush body 210 to cover the first roller brush assembly 100a, the first protrusion 410 and the second protrusion 420 are respectively inserted into the insertion holes 360 on the first linkage part 340 and the second linkage part 350, and the protrusions and the linkage part are in conflict so that the scraping assembly 300 is forced to overcome the bias of the second elastic member 390 and swing forward, thereby switching the scraping assembly 300 from the avoidance state to the extension state. In order to allow the protrusion to be smoothly inserted into the insertion hole 360, the first protrusion 410 and the second protrusion 420 can adopt a structure with a narrow top and a wide bottom. As an alternative to this embodiment, the setting of the insertion hole 360 ​​can also be cancelled. When the front cover 220 is installed on the floor brush body 210 to cover the first roller brush assembly 100a, the first protrusion 410 and the second protrusion 420 are respectively in conflict with the first linkage part 340 and the second linkage part 350, so that the scraping assembly 300 is forced to switch its state.

[0074] When the scraping assembly 300 switches between the avoidance state and the extended state, the long hole 370 can move forward and backward relative to the stud 3302, and the limiting hole 380 can move forward and backward relative to the limiting column 3303, so that the scraping assembly 300 can be smoothly switched between the extended state and the avoidance state while being limited.

[0075] Combination Fig.10 In normal state, the scraping assembly 300 is in an evasive state under the bias of the second elastic member 390, and the second protrusion 420 is in a retracted state under the bias of the first elastic member 430. When the surface to be cleaned needs to be cleaned, the user selects the first roller brush assembly 100a or the second roller brush assembly 100b according to the type of the surface to be cleaned.

[0076] When the user selects the first roller brush assembly 100a and installs it on the floor brush body 210, the first roller brush 110a makes the first roller body 111a contact with the push block 440 during the installation process, and the push block 440 slides toward the support plate 250 under the force. The push block 440 sliding toward the support plate 250 drives the second protrusion 420 to move upward from the retracted state through the contact cooperation between the push surface 441 and the inclined surface 422, so that the second protrusion 420 switches from the retracted state to the extended state. Then the front cover 220 is installed on the floor brush body 210. During this process, the first protrusion 410 on the first side plate 120a and the second protrusion 420 in the extended state are respectively inserted into the insertion hole 360 ​​on the first linkage part 340 and the second linkage part 350. The protrusion cooperates with the linkage part to make the scraping assembly 300 move forward under the force to overcome the bias of the second elastic member 390. The forward moving scraping assembly 300 switches from the avoidance state to the extended state. The scraping assembly 300 in the extended state makes the scraping part 311 at the front end of the scraping strip 310 contact with the cleaning layer 112a, and makes the convex teeth 321 at the front end of the comb teeth 320 extend into the fluff of the cleaning layer 112a. When the device is working, the liquid supply component 30 supplies liquid to the first roller brush 110a through the water dividing member 33. The cleaning layer 112a of the first roller brush 110a absorbs the liquid and wets it, and then wet-wipes the surface to be cleaned. The scraping component 300 scrapes and squeezes the rotating first roller brush 110a, and the scraped and squeezed dirt flows into the sewage bucket 41 along the dirt suction airflow.

[0077] When the user selects the second roller brush assembly 100b and installs it on the floor brush body 210, the second roller body 111b will not contact the push block 440 during the installation of the second roller brush 110b, and the push block 440 will not slide, so the second protrusion 420 is still in a retracted state after the second roller brush assembly 100b is installed. Since the first protrusion 410 is not provided on the second side plate 120b, when the front cover 220 is installed on the floor brush body 210, the two linkage parts of the scraping assembly 300 will not be subjected to the force, so the scraping assembly 300 is still in an avoidance state after the front cover 220 is installed, and the scraping part 311 at the front end of the scraping strip 310 and the protruding teeth 321 at the front end of the comb teeth 320 basically do not contact the bristles 112b on the periphery of the second roller brush 110b. When the device is working, the liquid supply component 30 does not actively supply liquid to the second roller brush 110b. The user can press the liquid supply button to make the liquid supply component 30 supply liquid to the second roller brush 110b according to cleaning needs. The bristles 112b of the second roller brush 110b can be inserted into or slapped against objects such as carpets and floor mats. The dirt raised by the bristles 112b or the dirt attached to the bristles 112b can be sucked into the sewage bucket 41 under the action of suction. Since the scraping component 300 basically does not contact the bristles 112b when the second roller brush 110b rotates, the noise generated when the bristles 112b are scraped and squeezed by the scraping component 300 can be avoided, and the driving load of the power component 500 can also be reduced.

[0078] Embodiment 2

[0079] Combination Fig.12 In this embodiment, the push block, the second protrusion and the first elastic member are eliminated, and the trigger portion 400 is only provided with the first protrusion 410 located on the first side plate 120a. Accordingly, the scraping assembly 300 is only provided with the first linkage portion 340 corresponding to the first protrusion 410, and the second linkage portion is eliminated.

[0080] When the user installs the front cover 220 on the floor brush body 210 to cover the first roller brush assembly 100a, the first protrusion 410 cooperates with the first linkage part 340 to enable the scraping assembly to overcome the bias of the second elastic member and switch from the avoidance state to the extended state, so that the scraping assembly can smoothly scrape the first roller brush.

[0081] When the user installs the front cover 220 on the floor brush body 210 to cover the second roller brush assembly, since the first protrusion is not provided on the second side plate, the first linkage part 340 will not be subjected to force, and the scraping assembly is still in an avoidance state under the bias of the second elastic member, so that the scraping assembly basically does not contact the bristles on the second roller brush.

[0082] The other structures of the second embodiment are the same as those of the first embodiment and will not be described in detail here.

[0083] Embodiment 3

[0084] Combination Fig.13 In this embodiment, the first protrusion on the first side plate 120a is cancelled, and the trigger part 400 is only provided with a second protrusion 420 located on the support plate 250. Accordingly, the scraping assembly 300 is only provided with a second linkage part corresponding to the second protrusion 420, and the first linkage part is cancelled.

[0085] When the user installs the first roller brush assembly 100a on the floor brush body 210, the first roller body and the push block interfere with each other to switch the second protrusion 420 from the retracted state to the extended state. When the front cover 220 is installed on the floor brush body 210, the second protrusion 420 cooperates with the second linkage part to switch the scraping assembly from the avoidance state to the extended state.

[0086] When the user installs the second roller brush assembly on the floor brush body 210, the second roller body cannot interfere with the push block, and the second protrusion 420 is still in a retracted state under the bias of the first elastic member. When the front cover 220 is installed on the floor brush body 210, the second protrusion 420 cannot cooperate with the second linkage part to switch the scraping assembly from the avoidance state to the extended state. The scraping assembly is still in the avoidance state under the bias of the second elastic member, so that the scraping assembly basically does not contact the bristles on the second roller brush.

[0087] The other structures of the third embodiment are the same as those of the first embodiment and will not be described in detail here.

[0088] Embodiment 4

[0089] Combination Fig.14 , Fig.15 In this embodiment, the second elastic member 390 applies a forward force to the scraping assembly 300 under normal conditions, and the scraping assembly 300 is in an extended state under the bias of the second elastic member 390. At this time, the first protrusion provided on the first side plate of the first roller brush assembly is removed, and the first protrusion 410 is provided on the second side plate 120b of the second roller brush assembly 100b.

[0090] When the first roller brush assembly is selected, since the first roller brush assembly is not provided with the first protrusion, when the front cover 220 is installed on the floor brush body 210, the first roller brush assembly cannot force the scraping assembly to switch from the extended state to the avoidance state, and the scraping assembly is still in the extended state under the bias of the second elastic member. The scraping assembly in the extended state conflicts with the cleaning layer on the first roller brush.

[0091] When the second roller brush assembly 100b is selected, since the second side plate 120b of the second roller brush assembly 100b is provided with the first protrusion 410, when the front cover 220 is installed on the floor brush body 210, the first protrusion 410 cooperates with the first linkage part 340 to enable the scraping assembly to overcome the bias of the second elastic member 390 and switch from the extended state to the avoidance state. The scraping assembly switched to the avoidance state basically does not contact the bristles of the second roller brush 110b.

[0092] The other structures of the fourth embodiment are the same as those of the first embodiment and will not be described in detail here.

[0093] Embodiment 5

[0094] In this embodiment, the scraping assembly 300 is slidably disposed at the bottom of the water dividing member 33 , and the brackets 330 at both ends of the scraping assembly 300 are slidably connected to the front cover 220 .

[0095] In this embodiment, the triggering unit may adopt the structure described in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment.

[0096] The other structures of the fifth embodiment are the same as those of the first embodiment and will not be described in detail here.

[0097] Embodiment 6

[0098] Combination Fig.16 In this embodiment, the floor brush body 210 is provided with a driving assembly 600 that is drivingly connected to the trigger part. Under the action of the driving assembly 600, the trigger part switches the scraping assembly 300 to the extended state or the avoidance state. Specifically, the driving assembly 600 includes an actuator 610 and a connector 620. The actuator 610 can be an electromagnet, a micro motor, a micro cylinder or other components with a linear actuation function. One end of the connector 620 is transmission-connected to the power output end of the actuator 610, and the other end of the connector 620 can be connected to the trigger part. For example, the actuator 610 can be a linear motor, one end of the connector 620 is connected to the power output end of the linear motor, and the end of the connector 620 extending out of the floor brush body 210 constitutes the trigger part. The front cover 220 is provided with a linkage hole that matches the end of the connector 620. When the front cover 220 is installed on the floor brush body 210, the connecting member 620 cooperates with the linkage hole, and the linear motor drives the front cover 220 to move forward or backward through the cooperation between the connecting member 620 and the linkage hole. The front cover 220 moving forward drives the scraping assembly 300 to move to the extended state, and the front cover 220 moving backward drives the scraping assembly 300 to move to the avoidance state. Since the linkage hole is provided on the bottom side of the front cover 220, the front cover 220 driven by the driving assembly 600 drives the water diversion member 33 to move forward and backward synchronously, that is, the water diversion member 33, the scraping assembly 300 and the front cover 220 move forward and backward synchronously.

[0099] As an alternative to this embodiment, the linkage hole that cooperates with the trigger part 400 can also be only provided on the scraping assembly 300. In this case, the driving assembly 600 drives the scraping assembly 300 to move forward and backward through the cooperation between the trigger part and the linkage hole, so that the scraping assembly 300 can switch between the avoidance state and the extension state. Of course, the water-dividing member 33 and the scraping assembly 300 can be fixedly connected, so that the water-dividing member 33 moves forward and backward synchronously with the scraping assembly 300.

[0100] The other structures of the sixth embodiment are the same as those of the first embodiment and will not be described in detail here.

[0101] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A surface cleaning device with a floating scraping assembly, comprising a floor brush provided with a roller brush assembly, the floor brush comprising a floor brush body and a front cover which cooperate to form a mounting cavity, the roller brush assembly being arranged in the mounting cavity, characterized in that: The floor brush also includes a scraping assembly movably arranged on the front cover, the roller brush assembly and / or the floor brush body is provided with a trigger portion, the front cover is detachably mounted on the floor brush body and the scraping assembly can be driven to move by the trigger portion, so that the scraping assembly has an extended state in conflict with the roller brush assembly or an evasive state separated from the roller brush assembly.

2. A surface cleaning device with a floating scraping assembly according to claim 1, characterized in that: The roller brush assembly includes a first roller brush assembly and a second roller brush assembly which can be selectively installed on a floor brush, wherein the first roller brush assembly is installed on the floor brush so that the scraping assembly has an extended state that interferes with the first roller brush assembly, and the second roller brush assembly is installed on the floor brush so that the scraping assembly has an evasive state that is separated from the second roller brush assembly.

3. A surface cleaning device with a floating scraping assembly according to claim 2, characterized in that: The front cover is provided with a first linkage part linked with the scraping assembly at one end facing the roller brush assembly, and the trigger part includes a first protrusion provided on the first roller brush assembly, and the first protrusion cooperates with the first linkage part to switch the scraping assembly from the avoidance state to the extension state; Alternatively, the front cover is provided with a first linkage portion linked to the scraping assembly at one end facing the roller brush assembly, and the trigger portion includes a first protrusion provided on the second roller brush assembly, and the first protrusion cooperates with the first linkage portion to switch the scraping assembly from the extended state to the avoidance state.

4. A surface cleaning device with a floating scraping assembly according to any one of claims 1 to 3, characterized in that: The floor brush body is provided with a transmission head which is transmission-connected to the roller brush assembly, the floor brush body is provided with a support plate at one end close to the transmission head, the front cover is provided with a second linkage part which is linked to the scraping assembly at one end facing the support plate, the support plate is provided with a second protrusion which is movably arranged and has a trigger state and a retracted state, the second protrusion in the trigger state can cooperate with the second linkage part, and the second protrusion in the retracted state is disengaged from the second linkage part.

5. A surface cleaning device with a floating scraping assembly according to claim 4, characterized in that: The roller brush assembly includes a first roller brush assembly and a second roller brush assembly which can be selectively installed on the floor brush, the first roller brush assembly includes a first roller body and a cleaning layer arranged on the outer periphery of the first roller body, the second roller brush assembly includes a second roller body and bristles arranged on the outer periphery of the second roller body, the outer diameter of the first roller body is greater than the outer diameter of the second roller body, and the first roller body switches the second protrusion from a retracted state to a triggered state when the first roller brush assembly is installed on the floor brush.

6. A surface cleaning device with a floating scraping assembly according to claim 5, characterized in that: The trigger part also includes a push block transmission-connected to the second protrusion, and the push block can cooperate with the first roller body so that the push block pressed by the first roller body drives the second protrusion to switch from a retracted state to a trigger state; and / or, a first elastic member is provided on the support plate to keep the second protrusion in a retracted state, and the second protrusion switching from the retracted state to the trigger state causes the first elastic member to deform under force.

7. A surface cleaning device with a floating scraping assembly according to claim 1, characterized in that: The floor brush body is further provided with a driving assembly drivingly connected to the trigger part, and the trigger part switches the scraping assembly to an extended state or an evasive state under the action of the driving assembly.

8. A surface cleaning device with a floating scraping assembly according to claim 7, characterized in that: The front cover is also provided with a water dividing member, which is arranged above the scraping assembly and moves along with the scraping assembly.

9. A surface cleaning device with a floating scraping assembly according to claim 1 or 2 or 3 or 7 or 8, characterized in that: The front cover is provided with a second elastic member for keeping the scraping assembly in an evasive state or an extended state, and the scraping assembly that switches its state causes the second elastic member to be deformed by force.

10. A surface cleaning device with a floating scraping assembly according to claim 1 or 2 or 3 or 7 or 8, characterized in that: The scraping assembly can be arranged on the front cover so as to swing back and forth; or, the scraping assembly can be arranged on the front cover so as to slide back and forth.

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