Surface cleaning device for flat machine body

Abstract

The utility model discloses a surface cleaning device with a flat machine body, which belongs to the technical field of cleaning equipment, and comprises a machine body, a ground brush, a dirt suction assembly, a liquid supply assembly, a battery pack assembly and a control module, the machine body is in a flat shape with the left-right width larger than the front-back thickness, the machine body comprises a front shell and a rear shell, and a first mounting cavity with a forward opening is formed in the upper part of the rear shell; the front shell is buckled to the front side of the rear shell and used for containing the control module, the battery pack assembly and the draught fan in the first installation cavity, and a scratch-proof structure is arranged on the front surface of the front shell. The scratch-proof structure is arranged at the position, most prone to collision, of the machine body, the front surface of the front shell is prevented from being scratched through the scratch-proof structure, and the outer surface of the machine body can be kept intact.

Description

TECHNICAL FIELD

[0001] The utility model relates to cleaning equipment technical field especially relates to a surface cleaning device of flat machine body. BACKGROUND

[0002] The existing hand-held floor cleaning machine generally includes a machine body, a floor brush, a liquid supply assembly and a dirt suction assembly, the floor brush is provided with a dirt suction port and a cleaning element driven by a motor, the liquid supply assembly supplies liquid to the cleaning element so that the cleaning element can wipe the ground after being wetted by the liquid, and the dirt suction airflow formed by the suction of the dirt suction fan can suck the dirt into the sewage tank through the dirt suction port.

[0003] In order to enable the hand-held floor cleaning machine to clean the ground in low space such as bed bottom, sofa bottom and cabinet bottom, the machine body of some existing surface cleaning machines can be rotated rearward by a large angle to a lying state relative to the floor brush, and the lying machine body can drive the floor brush to extend into the low space for cleaning. When the hand-held floor cleaning machine is used to clean the low space, the upper surface of the machine body is easy to knock against the upper edge of the low space, resulting in scratches on the surface of the machine body, which is not conducive to keeping the machine body intact, thereby not conducive to improving the user's experience. SUMMARY

[0004] In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the utility model provides a surface cleaning device with a flat machine body, a scratch-proof structure is arranged at the position of the machine body where the scratch is most likely to occur, the scratch-proof structure is used to avoid the front surface of the front shell being scratched, so that the outer surface of the machine body can remain intact.

[0005] In order to achieve the above technical purpose, the utility model provides a surface cleaning device with a flat machine body, which comprises:

[0006] A machine body, the upper end of which is provided with a handle;

[0007] A floor brush pivotally connected to the lower end of the machine body, the floor brush being provided with a cleaning element, a dirt suction port and a water outlet hole;

[0008] A dirt suction assembly, comprising a fan and a sewage tank, the fan being used to provide negative pressure suction, and the sewage tank being communicated with the dirt suction port;

[0009] A liquid supply assembly, which provides cleaning liquid through the water outlet hole;

[0010] A battery pack assembly, which is used to supply power to the electric elements;

[0011] A control module;

[0012] The machine body is in a flat shape with a left-right width greater than a front-rear thickness;

[0013] The fuselage comprises a front shell and a rear shell, an upper portion of the rear shell is formed with a first installation cavity with a front opening, and the front shell is fastened to a front side of the rear shell to accommodate a control module, a battery pack assembly and a fan in the first installation cavity.

[0014] The front surface of the front shell is provided with an anti-scratch structure.

[0015] Preferably, the front shell covers the entire front surface of the rear shell, and the anti-scratch structure is arranged at a central region of the front surface of the front shell.

[0016] Preferably, the front surface of the front shell comprises a flat surface at the central region and a curved surface at a periphery of the central region, and the central region of the front surface of the front shell is at the highest position when the fuselage is laid down.

[0017] Preferably, the front shell comprises a front wall at the central region and a side wall at a periphery of the front wall, and the anti-scratch structure is arranged on the front wall.

[0018] Preferably, the anti-scratch structure comprises a plurality of anti-scratch protrusions arranged at intervals.

[0019] Preferably, the anti-scratch protrusions are formed by local outward bulging of the front shell.

[0020] Preferably, the anti-scratch protrusions are soft rubber protrusions embedded in the front shell.

[0021] Preferably, the anti-scratch protrusions are in a strip shape and extend along a height direction of the fuselage, and both ends of the anti-scratch protrusions are smoothly transitioned with the front surface of the front shell.

[0022] Preferably, the battery pack assembly comprises at least two battery cells arranged around the fan, and the battery cells are arranged close to a cavity wall of the first installation cavity.

[0023] Preferably, a lower portion of the rear shell is formed with a second installation cavity with a rear opening, the sewage bucket is detachably installed at the second installation cavity, and a rear surface of the sewage bucket is lower than or flush with a rear surface of the rear shell when the sewage bucket is installed at the second installation cavity; and / or, an auxiliary wheel is arranged at an upper portion of the rear shell, and at least a part of the auxiliary wheel protrudes from the rear surface of the rear shell.

[0024] After the above technical solution is adopted, the present application has the following advantages:

[0025] 1. The surface cleaning device provided by the utility model, the fuselage is flat with the left and right width greater than the front and back thickness, the appearance of the fuselage is reasonably arranged, the height of the fuselage relative to the ground is reduced when lying back, so that the fuselage can drive the floor brush into the low space such as the bottom of the bed, the bottom of the sofa and the bottom of the cabinet for cleaning. The fuselage comprises a front shell and a rear shell, the upper part of the rear shell is provided with a first installation cavity with the opening facing forward, and the front shell is buckled on the front side of the rear shell to package the control module, the battery pack assembly and the fan in the first installation cavity. Since the control module, the battery pack assembly and the fan are arranged in the first installation cavity at the same time, the number of installation cavities on the fuselage can be reasonably reduced, the structure of the front shell and the rear shell can be reasonably simplified, and the assembly workload of the fuselage can be reasonably reduced.

[0026] The anti-scratch structure is arranged on the front surface of the front shell, when the fuselage is stretched into the low space for cleaning by lying back, the front surface of the front shell is located at the highest position of the fuselage, and the front surface of the front shell is most likely to be scratched by colliding with the upper edge of the low space, the anti-scratch structure is used to avoid the front surface of the front shell from being scratched by collision, so that the front shell can be kept intact, and the whole fuselage can be kept intact, thereby improving the user experience.

[0027] 2. The front shell covers the front surface of the whole rear shell, avoiding the internal components of the fuselage from leaking out. The anti-scratch structure is arranged in the central region of the front surface of the front shell, and the distribution region of the anti-scratch structure relative to the front surface of the front shell is reasonably arranged to avoid the front surface of the front shell from being scratched in a large area.

[0028] 3. The front surface of the front shell comprises a plane in the central region and a curved surface in the outer periphery, when the fuselage is lying back, the central region of the front surface of the front shell is located at the highest position of the fuselage, so the central region of the front surface is also the region most likely to be scratched by collision, the specific structure of the front surface of the front shell and the distribution region of the anti-scratch structure are reasonably arranged to ensure the anti-scratch effect of the anti-scratch structure on the shell.

[0029] 4. The front wall of the front shell is located in the central region, and the side wall is located in the outer periphery of the front wall, when the fuselage is lying back, the front wall of the front shell is located at the highest position of the fuselage, and the front wall of the front shell is most likely to be scratched by colliding with the upper edge of the low space, the anti-scratch structure is preferably arranged on the front wall of the front shell, the anti-scratch structure is arranged at the position on the fuselage most likely to collide, thereby avoiding the front shell from being scratched by collision with other objects, and the outer surface of the whole fuselage can be kept intact.

[0030] 5. The anti-scratch structure preferably comprises a plurality of anti-scratch protrusions distributed at intervals, the contact area between the front surface of the fuselage and the upper edge of the low space is greatly reduced when colliding, thereby avoiding the front shell from being scratched in a large area, and the outer surface of the whole fuselage can be kept intact.

[0031] 6. The anti-scratch protrusion can be formed by a local outward bulge of the front shell, that is, the anti-scratch protrusion can be integrally formed with the front shell. This can greatly reduce the assembly workload of the fuselage, improve the assembly efficiency of the fuselage, and also ensure the structural strength of the anti-scratch protrusion.

[0032] 7. The scratch-resistant protrusions can also be soft rubber ribs embedded in the front shell. Because soft rubber ribs are elastic, they can return to their original shape after being bumped with other objects, further maintaining the integrity of the fuselage surface. In addition, using soft rubber ribs can greatly reduce the noise generated when the fuselage bumps into other objects.

[0033] 8. The anti-scratch protrusion is preferably designed as a strip extending along the height of the body. The specific design of the anti-scratch protrusion is optimized to reduce the molding difficulty. The two ends of the anti-scratch protrusion smoothly transition to the front surface of the front shell to avoid forming sharp corners at both ends, thereby preventing users from being scratched by the sharp corners at both ends of the anti-scratch protrusion.

[0034] 9. The battery units of the battery pack assembly are distributed around the fan and are set close to the cavity wall of the first mounting cavity. This allows the battery units to be located on the periphery of the fan, i.e., distributed inside and outside the battery pack assembly and the fan. This can appropriately reduce the height of the battery pack assembly and the fan after assembly, thereby appropriately reducing the height of the first mounting cavity, so as to reasonably control the overall height of the machine body.

[0035] 10. The lower part of the rear housing forms a second mounting cavity with the opening facing backward. The sewage tank can be detachably installed in the second mounting cavity, that is, the sewage tank can be detachably installed on the rear side of the machine body. When the machine body is tilted backward, the sewage tank is located at the bottom of the machine body, which can prevent the sewage tank from hitting the upper edge of the low space when the machine body is tilted backward, ensuring the installation stability of the sewage tank, thereby ensuring the working stability of the whole machine.

[0036] An auxiliary wheel is provided on the upper part of the back cover. At least part of the auxiliary wheel protrudes from the rear surface of the back cover. When the machine body is tilted backward, the auxiliary wheel contacts the ground and supports the machine body. This reduces the difficulty for users to hold the machine body and push and pull the machine body to clean the floor. It also avoids the rear surface of the machine body from being scratched by contact with the ground, which helps to improve the user experience. Attached Figure Description

[0037] Figure 1 This is an overall diagram of the surface cleaning device in Embodiment 1;

[0038] Figure 2 This is a schematic diagram of the surface cleaning device in Embodiment 1 when the machine body is laid flat;

[0039] Figure 3An exploded view of the main body of the surface cleaning device of Example 1;

[0040] Figure 4 A structure view of the surface cleaning device of Example 1 when the front shell is not covered with the rear shell;

[0041] Figure 5 A structure view of the rear shell of the surface cleaning device of Example 1;

[0042] Figure 6 A sectional view of the floor brush along the front-rear direction of the surface cleaning device of Example 1;

[0043] Figure 7 A structure view of the floor brush body of the surface cleaning device of Example 1;

[0044] Figure 8 A schematic view of the liquid supply assembly of the surface cleaning device of Example 1;

[0045] Figure 9 A sectional view of the front shell along the direction perpendicular to the height direction of the surface cleaning device of Example 1;

[0046] Figure 10 A partial sectional view of the front shell along the height direction of the surface cleaning device of Example 1;

[0047] Figure 11 A structure view of the combination of the battery pack assembly and the fan assembly of the surface cleaning device of Example 1;

[0048] Figure 12 A sectional view of the front shell along the direction perpendicular to the height direction of the surface cleaning device of Example 2.

[0049] In the drawings, 100-main body, 110-front shell, 111-front wall, 111a-flat surface, 112-side wall, 112a-curved surface, 120-rear shell, 121-first mounting cavity, 122-second mounting cavity, 130-handle, 140-scratch-proof structure, 141-scratch-proof protrusion, 141a-scratch-proof protruding rib, 141b-soft rubber protruding rib, 141c-soft rubber pad, 150-plug pipe, 160-pivot joint, 170- auxiliary wheel,

[0050] 200-floor brush, 210-cleaning element, 220-suction port, 230-floor brush body, 240-roller brush cover, 250-roller brush cavity, 260-motor, 270-scraping element, 280-floor scraper,

[0051] 300-liquid supply assembly, 310-clean water tank, 320-water pump, 330-water distribution element, 331-water outlet hole, 340-heating element,

[0052] 410-fan, 420-sewage bucket, 430-communication passage,

[0053] 500 - control module,

[0054] 600 - battery pack assembly, 610 - battery cell, DETAILED DESCRIPTION

[0055] The utility model will be further described below in combination with the drawings and specific embodiments. It should be understood that the following "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "vertical", "horizontal", "top", "bottom" and other words indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device / element must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model.

[0056] Embodiment one

[0057] In combination Figures 1 to 11 , the utility model embodiment one provides a surface cleaning device of flat fuselage, include:

[0058] The upper end of the fuselage 100 is provided with a handle 130;

[0059] The ground brush 200 is pivotally connected to the lower end of the fuselage 100, and the ground brush 200 is provided with a cleaning element 210, a sewage suction port 220 and a water outlet hole 331;

[0060] The sewage suction assembly includes a fan 410 and a sewage tank 420, the fan 410 is used to provide negative pressure suction force, and the sewage tank 420 is communicated with the sewage suction port 220;

[0061] The liquid supply assembly 300 provides cleaning liquid through the water outlet hole 331;

[0062] The battery pack assembly 600 is used to supply power to the electric element;

[0063] The control module 500;

[0064] The fuselage 100 is in a flat shape with the left and right width W being greater than the front and back thickness T;

[0065] The fuselage 100 includes a front shell 110 and a rear shell 120, the upper part of the rear shell 120 is formed with a first mounting cavity 121 with an opening facing forward, and the front shell 110 is buckled on the front side of the rear shell 120, so as to accommodate the control module 500, the battery pack assembly 600 and the fan 410 in the first mounting cavity 121;

[0066] The front surface of the front shell 110 is provided with an anti-scratch structure 140.

[0067] When the machine body 100 is laid back and stretched into a low space for cleaning, the front surface of the front shell 110 is located at the highest position of the machine body 100, and the front surface of the front shell 110 is most likely to be scratched by colliding with the upper edge of the low space. The scratch-proof structure 140 is used to avoid the front surface of the front shell 110 from being scratched by collision, so that the front shell 110 can remain intact, and thus the entire machine body 100 can remain intact, which is beneficial to improve the user's experience.

[0068] In combination Figure 2 In the embodiment, the handle 130 is fixed to the upper end of the machine body 100 through the insertion pipe 150, and the lower end of the machine body 100 is pivotally connected to the rear side of the floor brush 200 through the pivot joint 160. In combination Figure 6 、 Figure 7 The floor brush 200 includes a floor brush body 230 and a roller brush cover 240, and the roller brush cover 240 is detachably installed on the top side of the floor brush body 230. When the roller brush cover 240 is installed on the top side of the floor brush body 230, the two cooperate to form a roller brush cavity 250 for installing the cleaning element 210. The cleaning element 210 is detachably installed at the roller brush cavity 250, and the roller brush cavity 250 or the floor brush body 230 is provided with a motor 260 for driving the cleaning element 210. The specific structure of the motor 260 driving the cleaning element 210 can refer to the prior art, and will not be repeated here. The cleaning element 210 can adopt a single roller brush structure, a double roller brush structure, or a track-type mop structure, and the cleaning element 210 is not limited here.

[0069] In the embodiment, the suction port 220 is arranged on the floor brush body 230 and communicates with the roller brush cavity 250, and the upper side of the suction port 220 is provided with a scraping element 270 for scraping the cleaning element 210, and the scraping element 270 extends along the axial direction of the cleaning element 210. The scraping element 270 can adopt a single scraping strip structure, a single comb structure, or a combination of a scraping strip and a comb structure, and the scraping element 270 is not limited here. The lower side of the suction port 220 is provided with an elastic ground scraping 280, and the lower edge of the ground scraping 280 can be in contact with the ground when the device cleans the ground.

[0070] In combination Figure 8The liquid supply assembly 300 comprises, in sequence from upstream to downstream through a pipeline, a clean water tank 310, a water pump 320 and a water distribution member 330. The clean water tank 310 is detachably mounted on the machine body 100 or detachably mounted on the floor brush main body 230 or fixed to the bottom of the roller brush cover 240. The water pump 320 is arranged in the floor brush main body 230. The water distribution member 330 is arranged above the suction port 220 and is provided with a plurality of water outlet holes 331 distributed in the left-right direction. The water outlet holes 331 are arranged towards the cleaning member 210. The water distribution member 330, the scraping member 270, the suction port 220 and the floor scraping member 280 are arranged in sequence from top to bottom. The cleaning liquid in the clean water tank 310 flows to the water distribution member 330 under the pumping action of the water pump 320. The cleaning liquid flowing into the water distribution member 330 is sprayed onto the cleaning member 210 from the water outlet holes 331, so that the cleaning member 210 can be wetted by the liquid. As a preferred solution of the embodiment, the water distribution member 330 can adopt a structure in which a water inlet channel is divided into a plurality of water outlet channels in the prior art, of course, other components such as nozzles or sprayers that meet the liquid supply requirements can also be used instead of the water distribution member 330. As an improved solution of the embodiment, the liquid supply assembly 300 can be provided with a heating member 340 upstream of the water distribution member 330 for heating the liquid flowing therethrough. The heated liquid is sprayed from the water distribution member 330. As an alternative solution of the embodiment, the liquid supply assembly 300 can be additionally provided with a liquid spraying member for spraying the cleaning liquid onto the surface to be cleaned on the basis of the water distribution member 330. The liquid spraying member is connected to the end of the pipeline through an electronic control valve. At this time, a ground liquid spraying button for selective operation by the user can be arranged on the handle 130. If the user presses the ground liquid spraying button, the electronic control valve is opened, and the liquid supply assembly 300 can spray the cleaning liquid onto the surface to be cleaned through the liquid spraying member. As a preferred solution of the embodiment, in order to reduce the thickness T of the machine body 100, the clean water tank 310 is preferably arranged at the bottom of the roller brush cover 240, and an adapter structure is arranged between the roller brush cover 240 and the floor brush main body 230. The water distribution member 330 and the scraping member 270 can be arranged at the bottom of the roller brush cover 240 or arranged at the front side of the floor brush main body 230. The water distribution member 330 can be arranged at the bottom of the roller brush cover 240 and the scraping member 270 can be arranged at the front side of the floor brush main body 230. N (N is a natural number) into a plurality of water outlet channels, of course, other components such as nozzles or sprayers that meet the liquid supply requirements can also be used instead of the water distribution member 330. As an improved solution of the embodiment, the liquid supply assembly 300 can be provided with a heating member 340 upstream of the water distribution member 330 for heating the liquid flowing therethrough. The heated liquid is sprayed from the water distribution member 330. As an alternative solution of the embodiment, the liquid supply assembly 300 can be additionally provided with a liquid spraying member for spraying the cleaning liquid onto the surface to be cleaned on the basis of the water distribution member 330. The liquid spraying member is connected to the end of the pipeline through an electronic control valve. At this time, a ground liquid spraying button for selective operation by the user can be arranged on the handle 130. If the user presses the ground liquid spraying button, the electronic control valve is opened, and the liquid supply assembly 300 can spray the cleaning liquid onto the surface to be cleaned through the liquid spraying member. As a preferred solution of the embodiment, in order to reduce the thickness T of the machine body 100, the clean water tank 310 is preferably arranged at the bottom of the roller brush cover 240, and an adapter structure is arranged between the roller brush cover 240 and the floor brush main body 230. The water distribution member 330 and the scraping member 270 can be arranged at the bottom of the roller brush cover 240 or arranged at the front side of the floor brush main body 230. The water distribution member 330 can be arranged at the bottom of the roller brush cover 240 and the scraping member 270 can be arranged at the front side of the floor brush main body 230.

[0071] In combination with Figure 3 , Figure 4 , Figure 5 , in the embodiment, the front shell 110 and the rear shell 120 are respectively injection molded. The front shell 110 and the rear shell 120 are provided with a positioning and matching structure. During assembly, the front shell 110 and the rear shell 120 are first positioned and combined together through the positioning and matching structure, and then locked through screws. As an alternative solution of the embodiment, the front shell 110 and the rear shell 120 can be fixedly buckled together through a buckle and slot matching structure.

[0072] In the embodiment, the front shell 110 covers the front surface of the whole rear shell 120, and the front shell 110 and the rear shell 120 combine to form a substantially long rectangular outer shell. Specifically, the front shell 110 has a front wall 111 located at the central region of the front shell 110 and a side wall 112 extending from the outer edge of the front wall 111 towards the rear shell 120. The side wall 112 is located at the outer periphery of the front wall 111 and has a certain taper, and the front shell 110 as a whole has a trapezoidal shell shape with the front wall 111 located at the central region of the front shell 110.

[0073] In combination Figure 2 When the machine body 100 is laid back, the front wall 111 of the front shell 110 is the highest position of the machine body 100. When the user pushes and pulls the machine body 100 in this state to move the brush 200 back and forth in the low space to clean the ground, the front surface of the front shell 110 is most likely to contact and be scratched by the upper edge of the low space. Based on this, in the embodiment, the scratch-proof structure 140 is preferably arranged on the front wall 111 of the front shell 110. Further, the front surface of the front wall 111 is substantially a plane 111a which constitutes the central region of the front surface of the front shell 110, and the front surface of the side wall 112 is substantially a curved surface 112a with a taper which constitutes the peripheral region of the front surface of the front shell 110. The scratch-proof structure arranged on the front wall 111 is located at the central region of the front surface of the front shell 110.

[0074] In combination Figure 9 In the embodiment, the scratch-proof structure 140 includes a plurality of spaced-apart scratch-proof protrusions 141. Preferably, the scratch-proof protrusion 141 is a scratch-proof protruding rib 141a which is integrally formed with the front wall 111. The scratch-proof protruding rib 141a is formed by the local outward bulging of the front wall 111, which can greatly reduce the assembly workload of the machine body and is conducive to improving the assembly efficiency of the machine body. Further, the scratch-proof protruding rib 141a is in a strip shape and extends along the height direction of the front wall 111. The outward bulging height h of the scratch-proof protruding rib 141a relative to the plane 111a is about 0.5mm-2mm, and is preferably designed to be 1.5mm. Of course, it can also be designed to be 0.5mm, 0.7mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm or other reasonable sizes. Reasonably designing the outward bulging height h of the scratch-proof protruding rib 141a can meet the scratch-proof requirement while avoiding excessive dust accumulation in the groove formed by the adjacent two scratch-proof protruding ribs 141a. As an optional scheme of the embodiment, the cross-sectional shape of the scratch-proof protruding rib 141a perpendicular to the height direction of the front wall 111 can be designed to be a semicircle, a circular dome triangle, a trapezoid or other reasonable shapes.

[0075] In combination Figure 10The end of the scratchproof convex rib 141a is connected to the front wall 111 in a smooth transition through a curved surface, so that the top of the scratchproof convex rib 141a is connected to the plane 111a in a smooth transition through a curved surface, that is, the end of the scratchproof convex rib 141a is provided in a rounded structure, avoiding the formation of protruding sharp corners at the two ends of the scratchproof convex rib 141a, thereby avoiding the user from being scratched by the sharp corners at the two ends of the scratchproof convex rib 141a.

[0076] In combination Figure 11 In order to reduce the thickness T of the body 100 while reducing the height of the body 100, in the embodiment, the battery pack assembly 600 includes at least two battery units 610 distributed around the fan 410, and the battery units 610 are arranged close to the cavity wall of the first mounting cavity 121. Specifically, the battery pack assembly 600 has two battery units 610, and the two battery units 610 are respectively located on the left and right sides of the fan 410, that is, the two battery units 610 are respectively arranged close to the left and right side cavity walls of the first mounting cavity 121. The control module 500 is integrated with electronic elements such as capacitors and diodes, and the control module 500 is vertically arranged in the first mounting cavity 121 and located above the battery pack assembly 600. During assembly, first, the battery pack assembly 600 and the fan 410 are combined together to form a module, then the module is locked in the first mounting cavity 121 by screws, and the control module 500 is also locked in the first mounting cavity 121 by screws, finally, the front shell 110 is fixed to the front side of the rear shell 120, so that the front shell 110 closes the first mounting cavity 121, thereby packaging the battery pack assembly 600, the fan 410 and the control module 500 in the first mounting cavity 121, and the battery pack unit 610 is located between the fan and the side wall of the first mounting cavity 121. Of course, the body 100 can also be provided with a display screen on the top side of the front shell 110 for displaying working parameters such as power and suction strength, at this time, the first mounting cavity 121 is also provided with a digital display module, and the digital display module is electrically connected to and / or signal connected to the control module 500. As another scheme of the embodiment, the battery pack assembly 600 can also be provided with four battery pack units 610, at this time, the four battery pack units 610 are distributed around the fan 410 and respectively located at the four corners of the first mounting cavity 121.

[0077] In combination Figure 5In this embodiment, the lower part of the rear shell 120 is formed with a second installation cavity 122 with an opening facing backward, the shape of the second installation cavity 122 is adapted to the shape of the sewage bucket 420, the sewage bucket 420 is detachably installed at the second installation cavity 122, and the machine body 100 and the floor brush 200 have a communication passage 430 communicating the suction port 220 and the sewage bucket 420. The fan 410 provides suction when working to form a suction flow from the suction port 220 into the sewage bucket 420 through the communication passage 430, and the dirt follows the suction flow into the sewage bucket 420, realizing the collection of the dirt. Specifically, in order to reasonably control the front-rear thickness T of the machine body 100, the sewage bucket 420 in this embodiment is also flat with a left-right width greater than the front-rear thickness. When the sewage bucket 420 is installed at the second installation cavity 122, the rear surface of the sewage bucket 420 is substantially flush with the rear surface of the machine body 100 as a whole. When the machine body 100 is laid backward, the sewage bucket 420 is located at the bottom of the machine body 100, which can avoid the sewage bucket 420 from knocking against the upper edge of a low space when the machine body 100 is laid backward, and ensure the installation stability of the sewage bucket 420. As an alternative of this embodiment, when the sewage bucket 420 is installed at the second installation cavity 122, the rear surface of the sewage bucket 420 can also be slightly lower than the rear surface of the machine body 100 as a whole, i.e., the rear surface of the sewage bucket 420 is slightly forward relative to the rear surface of the machine body 100 as a whole.

[0078] In this embodiment, when the machine body 100 is laid backward, the machine body 100 is substantially parallel to the ground, in order to reduce the operation difficulty of the user at this time, the upper part of the rear shell 120 is provided with an auxiliary wheel 170 located above the second installation cavity 122. The auxiliary wheel 170 is in contact with the ground when the machine body 100 is laid backward, and the machine body 100 is supported by the auxiliary wheel 170, which can reduce the difficulty of the user holding the machine body 100, can also reduce the operation difficulty of the user pushing and pulling the machine body 100 to make the floor brush 200 clean, and can also avoid the rear surface of the machine body 100 from being scratched due to contact with the ground. Specifically, the auxiliary wheel 170 can be rotatably erected on the upper part of the rear shell 120 through a supporting shaft, and at least part of the auxiliary wheel 170 protrudes backward relative to the rear surface of the rear shell 120.

[0079] It can be understood that the scratch-preventing protrusions 141a can also be provided in a wavy shape or other reasonable shape.

[0080] It can be understood that the scratch-preventing protrusions 141a can also be provided in a wavy shape or other reasonable shape.

[0081] It can be understood that the scratch-preventing structure 140 can be a hardened region formed by surface hardening treatment on the central region of the front shell 110, can also be a scratch-preventing coating attached to the central region of the plane 111a, or can also be a scratch-preventing protective film attached to the plane 111a. Of course, the scratch-preventing structure 140 can also be provided in other structures that meet the scratch-preventing requirements.

[0082] Embodiment Two

[0083] In combination Figure 12 In this embodiment, the scratch-resistant protrusions 141 are soft rubber protrusions 141b embedded in the front shell 110. As a possible solution for this embodiment, the soft rubber protrusions 141b are spaced apart and are located on one side of the soft rubber pad 141c, and the soft rubber protrusions 141b are integrally formed with the soft rubber pad 141c. The front shell 110 is provided with a slot for inserting the soft rubber protrusions 141b, the soft rubber protrusions 141b are inserted into the slot from the back to the front and protrude from the plane 111a of the front shell 110, and the soft rubber pad 141c is tightly attached to the rear surface of the front wall 111.

[0084] As an alternative solution for this embodiment, each soft rubber protrusion 141b can be separately formed and then embedded in the front shell 110.

[0085] As an alternative solution for this embodiment, the soft rubber pad 141c can also be directly attached to the plane 111a of the front shell 110.

[0086] As a possible solution for this embodiment, the soft rubber protrusions 141b can be arranged in a straight line, an S shape, a diamond pattern, or other reasonable patterns.

[0087] The other structures of Embodiment Two are the same as those of Embodiment One, and will not be described here.

[0088] In addition to the preferred embodiments described above, the utility model also has other embodiments, and those skilled in the art can make various changes and modifications according to the utility model, as long as they do not deviate from the spirit of the utility model, and all should belong to the scope defined in the claims of the utility model.

Claims

1. A surface cleaning device with a flat body, comprising: a body, an upper end of which is provided with a handle; a floor brush pivotally connected to a lower end of the body, the floor brush being provided with a cleaning element, a suction port and a water outlet; a suction assembly, comprising a fan for providing a negative pressure suction force and a sewage tank connected to the suction port; a liquid supply assembly for providing cleaning liquid through the water outlet; a battery pack assembly for supplying power to electrical components; a control module; characterized in that: the body is flat with a left-right width greater than a front-rear thickness; the body comprises a front shell and a rear shell, the rear shell being formed with a first installation cavity with an opening facing forward, the front shell being fastened to a front side of the rear shell to accommodate the control module, the battery pack assembly and the fan in the first installation cavity; the front surface of the front shell is provided with an anti-scratch structure.

2. A surface cleaning apparatus of the type defined in Claim 1 wherein, the front shell covers the entire front surface of the rear shell, and the anti-scratch structure is arranged in a central region of the front surface of the front shell.

3. A surface cleaning apparatus of the type claimed in claim 2 wherein, the front surface of the front shell comprises a flat surface in the central region and a curved surface in a peripheral region of the central region, and the central region of the front surface of the front shell is at the highest position when the body is laid down.

4. A surface cleaning apparatus of the type claimed in claim 2 wherein, the front shell comprises a front wall in the central region and a side wall in a peripheral region of the front wall, and the anti-scratch structure is arranged on the front wall.

5. A surface cleaning apparatus of the type described in either claim 1 or claim 2 or claim 3 or claim 4 wherein, the anti-scratch structure comprises a plurality of anti-scratch protrusions arranged at intervals.

6. A surface cleaning apparatus of the type claimed in claim 5 wherein, the anti-scratch protrusions are formed by the partial outward bulging of the front shell.

7. A surface cleaning apparatus of the type claimed in claim 5 wherein, the anti-scratch protrusions are soft rubber protrusions embedded in the front shell.

8. A surface cleaning apparatus of the type having a flat profile according to claim 5 wherein, the anti-scratch protrusions are in the shape of long strips and extend in the height direction of the body, and the two ends of the anti-scratch protrusions are smoothly transitioned with the front surface of the front shell.

9. A surface cleaning apparatus of the type described in either claim 1 or claim 2 or claim 3 or claim 4 wherein, the battery pack assembly comprises at least two battery units arranged around the fan, and the battery units are arranged close to the cavity wall of the first installation cavity.

10. A surface cleaning apparatus of the type described in claims 1 or 2 or 3 or 4 wherein, a second installation cavity with an opening facing backward is formed in a lower part of the rear shell, the sewage tank is detachably installed at the second installation cavity, and when the sewage tank is installed at the second installation cavity, a rear surface of the sewage tank is lower than or flush with a rear surface of the rear shell; and / or, an auxiliary wheel is arranged on the upper part of the rear shell, and at least a part of the auxiliary wheel protrudes from the rear surface of the rear shell.

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