Electric cleaning brush

Abstract

This utility model provides an electric cleaning brush, comprising: a main body, within which a drive assembly is disposed; and a brush head assembly connected to the main body, the brush head assembly including a first brush disc, a second brush disc, a first cleaning element, and a second cleaning element. Both the first and second brush discs are connected to the drive assembly. The first brush disc can move along a first direction under the drive of the drive assembly, and the second brush disc can move along a second direction different from the first direction under the drive of the drive assembly. The first cleaning element is connected to the first brush disc, and the second cleaning element is connected to the second brush disc. The ratio of the contact area between the first cleaning element and the surface to be cleaned to the contact area between the second cleaning element and the surface to be cleaned is in the range of 1 / 3 to 3. The first cleaning element moves along the first direction, and the second cleaning element moves along the second direction, so that the torque generated by the friction between them and the surface to be cleaned can be completely or mostly canceled out.

Description

Technical Field

[0001] This utility model relates to an electric cleaning brush, specifically an electric cleaning brush with multiple brush discs. Background Technology

[0002] Some existing electric cleaning brushes have a single brush head that rotates in one direction during operation. Users need to resist the friction between the brush head and the surface to be cleaned; otherwise, the brush head may shake or move, which is not conducive to the user's cleaning operation and may cause user fatigue during prolonged use. Utility Model Content

[0003] Therefore, this utility model provides an electric cleaning brush to solve the above problems.

[0004] To solve the above-mentioned technical problems, this utility model provides an electric cleaning brush, comprising: a main body, wherein a driving component is disposed within the main body; and a brush head assembly connected to the main body, the brush head assembly including a first brush disc, a second brush disc, a first cleaning component, and a second cleaning component, wherein both the first and second brush discs are connected to the driving component, the first brush disc being movable along a first direction under the drive of the driving component, the second brush disc being movable along a second direction different from the first direction under the drive of the driving component, the first cleaning component being connected to the first brush disc, the second cleaning component being connected to the second brush disc, and the ratio of the contact area between the first cleaning component and the surface to be cleaned to the contact area between the second cleaning component and the surface to be cleaned being in the range of 1 / 3-3.

[0005] Optionally, the second brush disk is rotatably connected to the first brush disk, the first brush disk has a cleaning component carrier surrounding the second brush disk, the first cleaning component is connected to the cleaning component carrier, and the first brush disk and the second brush disk can rotate in different directions under the drive of the drive assembly.

[0006] Optionally, the ratio of the operating speed of the second brush disk to the operating speed of the first brush disk is in the range of 1 / 5 to 5.

[0007] Optionally, the ratio of the contact area between the first cleaning component and the surface to be cleaned to the contact area between the second cleaning component and the surface to be cleaned is 1:1, and / or the ratio of the operating speed of the second brush to the operating speed of the first brush is 1:1.

[0008] Optionally, the first direction and the second direction are opposite.

[0009] Optionally, both the first and second brush disks are provided with multiple receiving holes, and both the first and second cleaning components include multiple sets of bristles. The bottom ends of the multiple sets of bristles of the first cleaning component are respectively fixed in the multiple receiving holes of the first brush disk, and the bottom ends of the multiple sets of bristles of the second cleaning component are respectively fixed in the multiple receiving holes of the second brush disk. The ratio of the sum of the areas of the multiple receiving holes of the first brush disk to the sum of the areas of the multiple receiving holes of the second brush disk is in the range of 1 / 3 to 3.

[0010] Optionally, the brush head assembly further includes a first bearing disposed between the first brush disk and the second brush disk, wherein the balls of the first bearing are in contact with the first brush disk and the second brush disk.

[0011] Optionally, it also includes a first connector, a second connector, and a transmission module. The second connector is connected to the output end of the drive assembly. The first connector is rotatably connected to the main body and connected to the output end of the drive assembly through the transmission module. The first brush disk is connected to the first connector, and the second brush disk is connected to the second connector.

[0012] Optionally, the transmission module includes a sun gear disposed on the second connector, a plurality of planet gears fixed to the main body, and an internal gear disposed on the first connector. The sun gear meshes with the plurality of planet gears, and the plurality of planet gears also mesh with the internal gear.

[0013] Optionally, the first brush disc has a connection area connected to the first cleaning component, and the second brush disc has a connection area connected to the second cleaning component. The ratio of the connection area of ​​the first brush disc to the connection area of ​​the second brush disc is in the range of 1 / 3 to 3.

[0014] The present invention has the following advantages: the first brush plate can drive the first cleaning component to move along the first direction, and the second brush plate can drive the second cleaning component to move along the second direction. Since the first cleaning component and the second cleaning component move in different directions, the torque generated by the friction between the two components and the surface to be cleaned can be completely or mostly canceled out, so that the user does not need to apply or only needs to apply a very small force to avoid unnecessary shaking or movement of the brush head assembly during operation. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1This is a perspective view of an electric cleaning brush according to an embodiment of the present utility model.

[0017] Figure 2 This is a perspective view of the electric cleaning brush according to an embodiment of the present invention, in which some elements are omitted.

[0018] Figure 3 This is an exploded view of an electric cleaning brush according to an embodiment of the present invention, wherein some elements are omitted.

[0019] Figure 4 This is an exploded view from another angle of the electric cleaning brush according to an embodiment of the present invention, in which some elements are omitted.

[0020] Figure 5 This is an exploded view from another angle of the electric cleaning brush according to an embodiment of the present invention, in which some elements are omitted.

[0021] Figure 6 This is an exploded view from another angle of the electric cleaning brush according to an embodiment of the present invention, in which some elements are omitted.

[0022] Figure 7 A cross-sectional view of an electric cleaning brush according to an embodiment of the present invention.

[0023] Figure 8 for Figure 7 Enlarged view of part A in the middle. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] refer to Figure 1-4In one embodiment, an electric cleaning brush 100 includes a body 10 and a brush head assembly 20. A drive assembly 11 is disposed within the body 10. The brush head assembly 20 is connected to the main body 10. The brush head assembly 20 includes a first brush disc 21, a second brush disc 22, a first cleaning component 23, and a second cleaning component 24. The first brush disc 21 and the second brush disc 22 are both connected to the drive assembly 11. The first brush disc 21 can move along a first direction under the drive of the drive assembly 11, and the second brush disc 22 can move along a second direction different from the first direction under the drive of the drive assembly 11. The first cleaning component 23 is connected to the first brush disc 21 (the first brush disc 21 and the first cleaning component 23 are also collectively referred to as the first brush head), and the second cleaning component 24 is connected to the second brush disc 22 (the second brush disc 22 and the second cleaning component 24 are also collectively referred to as the second brush head). The ratio of the contact area between the first cleaning component 23 and the surface to be cleaned (e.g., a wall or floor) to the contact area between the second cleaning component 24 and the surface to be cleaned is in the range of 1 / 3 to 3.

[0027] With the above structure, the first brush plate 21 can drive the first cleaning component 23 to move along the first direction, and the second brush plate 22 can drive the second cleaning component 24 to move along the second direction. Since the first cleaning component 23 and the second cleaning component 24 move in different directions, the torque generated by the friction between the two and the surface to be cleaned can be completely or mostly canceled out, so that the user does not need to apply or only needs to apply a very small force to avoid unnecessary shaking or movement of the brush head assembly 20 during operation.

[0028] In one embodiment, the main body 10 includes an elongated rod 101 and a head 102. The head 102 is connected to one end of the rod 101. This connection can be a fixed connection (i.e., the head 102 is fixed relative to the rod 101) or a rotatable connection (i.e., the head 102 can rotate relative to the rod 101). A brush head assembly 20 is connected to the head 102. It should be noted that when the head 102 is fixed to the rod 101, the two can be arranged at an angle or coaxially extending along the same axis.

[0029] In one embodiment, the drive assembly 11 includes a motor 12, a transmission assembly 13, a first output shaft 14, and a second output shaft 15. The motor 12, transmission assembly 13, and first output shaft 14 are disposed inside the rod portion 101, and the second output shaft 15 is disposed in the head portion 102. The input end of the transmission assembly 13 is connected to the motor shaft of the motor 12, and the output end of the transmission assembly 13 is connected to the first output shaft 14. Thus, the transmission assembly 13 can transmit the rotational motion output by the motor 12 to the first output shaft 14. When the head portion 102 is rotatably connected to the rod portion 101, or when the head portion 102 is fixed to the rod portion 101 but extends in different directions, the first output shaft 14 and the second output shaft 15 are connected by a universal coupling 16. This ensures that even when the first output shaft 14 and the second output shaft 15 extend along different axes, the rotational motion of the first output shaft 14 can still be transmitted to the second output shaft 15 via the universal coupling 16. Therefore, in this embodiment, the second output shaft 15 is the output end of the drive assembly 11.

[0030] As will be described below, in one embodiment, the rotational motion of the second output shaft 15 is transmitted to the first brush disk 21 and the second brush disk 22 respectively, causing the first brush disk 21 and the second brush disk 22 to rotate in opposite directions. However, those skilled in the art will recognize that in another embodiment, the rotational motion of the second output shaft 15 can be converted into linear motion. In this case, the first brush disk 21 and the second brush disk 22 can both be square and arranged side by side, and always move in opposite directions during operation. That is, during operation, the first brush disk 21 and the second brush disk 22 each make reciprocating linear movements, and their directions of movement are always opposite. In another embodiment, the first brush disk 21 and the second brush disk 22 can move along a preset curved trajectory, but their directions of movement are always opposite. In yet another embodiment, the first brush disk 21 and the second brush disk 22 are arranged side by side on both sides of the second output shaft 15, and driven by the second output shaft 15, the first brush disk 21 and the second brush disk 22 move in opposite directions. Understandably, the construction of the drive assembly 11 is not limited to the aforementioned cases and can be changed according to actual needs. For example, in some embodiments, the transmission assembly 13 can be omitted. In the two different embodiments described above, the first brush disk 21 and the second brush disk 22 move along opposite first and second directions. However, the relationship between the first and second directions is not limited to this. For example, in embodiments where the first brush disk 21 and the second brush disk 22 move in a straight line, the first and second directions can intersect, i.e., they form a certain angle. In addition, the number of brush disks included in the brush head assembly 20 is not limited to two and can be selected according to actual needs. For example, the number of brush disks can be more than two.

[0031] In one embodiment, the second brush disk 22 is rotatably connected to the first brush disk 21. The first brush disk 21 has a cleaning element support portion 211 surrounding the second brush disk 22, and a first cleaning element 23 is connected to the cleaning element support portion 211. The first brush disk 21 and the second brush disk 22 can rotate in different directions under the drive of the drive assembly 11. For example, during operation, the first brush disk 21 can rotate clockwise continuously, while the second brush disk 22 can rotate counterclockwise continuously. In another operating mode, the first brush disk 21 can be controlled to oscillate repeatedly within a certain angle range, that is, it first rotates clockwise by a certain angle, and then rotates counterclockwise by the same angle, and so on. The second brush disk 22 can also be controlled to oscillate repeatedly within a certain angle range. During this process, the rotation direction of the second brush disk 22 is always opposite to the rotation direction of the first brush disk 21.

[0032] In one embodiment, both the first brush disk 21 and the second brush disk 22 are generally flat discs. The front side of the first brush disk 21 (i.e., the surface facing the first cleaning member 23) is provided with a receiving cavity 212 that precisely accommodates the second brush disk 22, thereby forming an annular cleaning member support portion 211. Understandably, in other embodiments, the cleaning member support portion 211 does not necessarily need to surround the second brush disk 22 360 degrees; it can partially surround the second brush disk 22. For example, the cleaning member support portion 211 can surround the second brush disk 22 within a 180-degree range. After the second brush disk 22 is received in the receiving cavity 212, the front side of the second brush disk 22 (i.e., the surface facing the second cleaning member 24) and the front side of the cleaning member support portion 211 are flush, which allows the first cleaning member 23 connected to the front side of the cleaning member support portion 211 and the second cleaning member 24 connected to the front side of the second brush disk 22 to remain flush. Understandably, in another embodiment, the front surface of the second brush plate 22 (i.e., the surface facing the second cleaning element 24) is not flush with the front surface of the cleaning element support portion 211. Furthermore, the shapes of the first brush plate 21 and the second brush plate 22 are not limited to the aforementioned cases, and other suitable shapes can be selected as needed.

[0033] For example, in Figure 2 and Figure 3In the illustrated embodiment, both the first cleaning component 23 and the second cleaning component 24 include multiple sets of bristles 25, each set of bristles 25 comprising multiple filaments of the same length and diameter, which are tightly clustered together. In one embodiment, the front side of the cleaning component support portion 211 is provided with multiple evenly arranged receiving holes 213, and the front side of the second brush plate 22 is provided with multiple evenly arranged receiving holes 221. Each of the aforementioned receiving holes 213 / 221 is used to receive the root of a set of bristles 25. Each set of bristles 25 can be fixed in the receiving hole 213 / 221 by known connecting means. It is understood that the first cleaning component 23 and the second cleaning component 24 are not limited to being fixed in the receiving holes 213 / 221; they can be connected to the first brush plate 21 and the second brush plate 22 by hooking, magnetic attraction, or other means. It is understood that the construction of the first cleaning component 23 and the second cleaning component 24 is not limited thereto; for example, both the first cleaning component 23 and the second cleaning component 24 can be thin-sheet polishing cloths or scouring pads. The appropriate type of cleaning component can be selected according to actual needs. In this embodiment, the first brush plate 21 has a connection area connected to the first cleaning component 23, and the second brush plate 22 has a connection area connected to the second cleaning component 24. The ratio of the connection area of ​​the first brush plate 21 to the connection area of ​​the second brush plate 22 is between 1 / 3 and 3. It should be noted that in another embodiment, the first cleaning component 23 and the second cleaning component 24 can be made of different materials.

[0034] exist Figure 2 and Figure 3 In the illustrated embodiment, the contact area between the first cleaning element 23 and the surface to be cleaned can be calculated as follows: S = N * s, where S represents the contact area between the first cleaning element 23 and the surface to be cleaned, N represents the total number of receiving holes 213 with bristles provided on the first brush disk 21, and s represents the area of ​​each receiving hole 213. It should be noted that the receiving hole 213 includes a bottom surface, a circumferential surface, and an opening opposite the bottom surface; the aforementioned "area of ​​the receiving hole 213" refers to the area of ​​the opening of the receiving hole 213. The contact area between the second cleaning element 24 and the surface to be cleaned can be calculated in the same way, i.e., by multiplying the total number of receiving holes 221 on the second brush disk 22 by the area of ​​each receiving hole 221 (i.e., the opening of the receiving hole 221), the contact area between the second cleaning element 24 and the surface to be cleaned can be obtained.

[0035] In another embodiment, when both the first cleaning element 23 and the second cleaning element 24 can be thin-sheet polishing cloths or scouring pads, the first cleaning element 23 exactly covers the front surface of the cleaning element support portion 211, and the second cleaning element 24 exactly covers the front surface of the second brush plate 22. In this case, the contact area between the first cleaning element 23 and the surface to be cleaned is equal to the area of ​​the front surface of the cleaning element support portion 211, and the contact area between the second cleaning element 24 and the surface to be cleaned is equal to the area of ​​the front surface of the second brush plate 22. The ratio of the contact area between the first cleaning element 23 and the surface to be cleaned to the contact area between the second cleaning element 24 and the surface to be cleaned is in the range of 1 / 3-3. Accordingly, in Figure 2 and Figure 3 In the illustrated embodiment, the ratio of the total number of receiving holes 213 on the first brush plate 21 to the total number of receiving holes 221 on the second brush plate 22 is in the range of 1 / 3 to 3. It is understood that in another embodiment, when both the first cleaning member 23 and the second cleaning member 24 can be thin-sheet polishing cloths or scouring pads, the first cleaning member 23 and the second cleaning member 24 can also be smaller than the front surface of the cleaning member support portion 211 and the front surface of the second brush plate 22, respectively. In this case, the contact area between the first cleaning member 23 and the surface to be cleaned is equal to the area of ​​the connection region of the first brush plate 21 connected to the first cleaning member 23, and the contact area between the second cleaning member 24 and the surface to be cleaned is equal to the area of ​​the connection region of the second brush plate 22 connected to the second cleaning member 24.

[0036] When the electric cleaning brush 100 is working, the first cleaning component 23 and the second cleaning component 24 contact the surface to be cleaned, and the first cleaning component 23 and the second cleaning component 24 rotate relative to each other on the surface to be cleaned. After conducting numerous experiments, the inventors of this utility model discovered that when the ratio of the contact area between the first cleaning component 23 and the surface to be cleaned to the contact area between the second cleaning component 24 and the surface to be cleaned is in the range of 1 / 3 to 3, even if the resistance torque generated by the friction between the first cleaning component 23 and the second cleaning component 24 and the surface to be cleaned is not completely offset, most of the aforementioned resistance torque can be offset. Therefore, in some embodiments, the aforementioned ratio is 1. In this case, the contact area between the first cleaning component 23 and the surface to be cleaned and the contact area between the second cleaning component 24 and the surface to be cleaned can be set to be equal. In this case, the total number of receiving holes 213 on the first brush plate 21 and the total number of receiving holes 221 on the second brush plate 22 are equal. Understandably, the ratio of the contact area between the first cleaning component 23 and the surface to be cleaned to the contact area between the second cleaning component 24 and the surface to be cleaned is not limited to this. The ratio can be selected according to actual needs, and in other embodiments it can be 0.5, 1.5, 2 and 2.5.

[0037] In one embodiment, the ratio of the operating speed of the second brush disk 22 to the operating speed of the first brush disk 21 is in the range of 1 / 5 to 5. In another embodiment, in order to achieve approximately synchronous wear and tear and similar cleaning effects between the first and second cleaning components, the ratio of the operating speed of the second brush disk 22 to the operating speed of the first brush disk 21 can be set to 1:1.

[0038] In one embodiment, the brush head assembly 20 further includes a first bearing 26 disposed between the first brush disk 21 and the second brush disk 22, with the balls of the first bearing 26 contacting both the first brush disk 21 and the second brush disk 22. This configuration allows for relative rotational movement between the first brush disk 21 and the second brush disk 22. In this embodiment, the first bearing 26 is a planar bearing. Specifically, the first bearing 26 is housed within a receiving cavity 212 of the first brush disk 21, and the balls of the first bearing 26 contact the back surface of the second brush disk 22 and the bottom surface of the receiving cavity 212, respectively. It is understood that in another embodiment, the first bearing 26 may be a non-planar bearing.

[0039] In one embodiment, the brush head assembly 20 further includes a second bearing 27 and a brush head cover 28. The second bearing 27 and the brush head cover 28 are located on the side of the first brush disk 21 opposite to the second brush disk 22. The brush head cover 28 is connected to the second brush disk 22, and the second bearing 27 is located between the first brush disk 21 and the brush head cover 28. The balls of the second bearing 27 are in contact with the first brush disk 21 and the brush head cover 28. With this configuration, the second brush disk 22 can rotate relative to the first brush disk 21 following the brush head cover 28. In one embodiment, the second bearing 27 is a planar bearing. Specifically, a receiving cavity 214 is provided on the back side of the first brush disk 21 and the second brush disk 22. The second bearing 27 and the brush head cover 28 are both received in the receiving cavity 214, and the balls of the second bearing 27 are in contact with the inner surface of the brush head cover 28 and the bottom surface of the receiving cavity 214, respectively. It is understood that in another embodiment, the second bearing 27 can be a non-planar bearing.

[0040] In one embodiment, the electric cleaning brush 100 further includes a first connecting structure disposed on the second brush disc 22 and the brush head cover 28. The second brush disc 22 is connected to the brush head cover 28 via the first connecting structure, allowing it to rotate relative to the first brush disc 21 along with the brush head cover 28. In one embodiment, the first connecting structure includes a protrusion 222 disposed on the back surface of the second brush disc 22 and a groove 281 disposed on the inner surface of the brush head cover 28. The protrusion 222 has a non-circular cross-section (e.g., ...). Figure 4The groove 281 (with a square cross-section) is shaped to correspond to the protrusion 222, such that when the protrusion 222 is received in the groove 281, it is restricted by the inner circumferential surface of the groove 281 and cannot rotate freely, thereby achieving synchronous rotation of the second brush disk 22 and the brush head cover 28. In this embodiment, the bottom of the receiving cavity 212 of the first brush disk 21 is provided with a through hole 215 for the protrusion 222 to pass through and communicating with the receiving cavity 214.

[0041] refer to Figures 5 to 7 In one embodiment, the brush head assembly 20 is a separate component that can be detachably connected to the body 10. Thus, the brush head assembly 20 can be removed from the body 10 when needed. In one embodiment, the electric cleaning brush 100 also includes a first connector 31 and a second connector 32. The second connector 32 is connected to the output end of the drive assembly 11 (i.e., the second output shaft 15), and the first connector 31 is connected to the body 10 and to the output end of the drive assembly 11. The first connector 31 and the second connector 32 can move in different directions under the drive of the drive assembly 11.

[0042] In one embodiment, the second connector 32 is generally disc-shaped and has a receiving hole 321. The end of the second output shaft 15 of the drive assembly 11 extends into the receiving hole 321. The end of the second output shaft 15 is not circular. The shape of the receiving hole 321 is set according to the end of the second output shaft 15, so that the end of the second output shaft 15 is restricted by the inner wall of the receiving hole 321 and cannot rotate relative to the receiving hole 321, thereby realizing that the second connector 32 rotates synchronously with the second output shaft 15.

[0043] In one embodiment, the electric cleaning brush 100 further includes a transmission module 40, through which the first connector 31 is indirectly connected to the output end of the drive assembly 10. In one embodiment, the transmission module 40 is a planetary gear structure. Specifically, the transmission module 40 includes a sun gear 41 disposed on the second connector 32, a plurality of planet gears 42 fixed to the main body 10, and an internal gear 43 disposed on the first connector 31. The sun gear 41 meshes with the plurality of planet gears 42, and the plurality of planet gears 42 also mesh with the internal gear 43.

[0044] In one embodiment, the sun gear 41 is disposed on the back side of the second connector 32, and the teeth of the sun gear 41 are formed on the protrusion 322 provided with the receiving hole 321. Thus, the sun gear 41 can rotate synchronously with the second output shaft 15. In this embodiment, the sun gear 41 and the second connector 32 are integrally formed. In another embodiment, the sun gear 41 and the second connector 32 are independent components, and the sun gear 41 can be connected to the second connector 32 by conventional connection means.

[0045] In one embodiment, the first connector 31 includes a body 311, the body 311 is provided with a receiving cavity 312 for receiving the second connector 32, the bottom of the receiving cavity 312 is provided with a through hole, and the circumferential side of the through hole is provided with gear teeth to form the internal gear 43.

[0046] In one embodiment, the main body 10 further includes a back plate 103 fixed to the head 102. The plurality of planetary gears 42 are rotatably connected to the back plate 103. The back plate 103 also has a through hole through which the second output shaft 15 passes. With this configuration, the second connector 32 can rotate synchronously with the sun gear 41, which drives the planetary gears 42 to rotate, which in turn drives the first connector 31 to rotate. The rotation direction of the first connector 31 is opposite to that of the second connector 32. In this embodiment, the first connector 31 is held between the second connector 32 and the main body 10. Specifically, the second connector 32, housed in a receiving cavity 312 of the first connector 31, can be fixed to the end of the second output shaft 15 by fasteners such as screws. The first connector 31 is sandwiched in the space between the second connector 32 and the back plate 103. With this configuration, the second connector 32 is fixed to the second output shaft 15, while the first connector 31 is rotatably connected to the main body 10.

[0047] In one embodiment, the electric cleaning brush 100 further includes a second connecting structure disposed on the second connector 32 and the second brush head (i.e., the collective term for the second brush disc 22 and the second cleaning component 24), the second connecting structure detachably connecting the second brush head to the second connector 32. In one embodiment, since the brush head cover 28 is connected to the second connector 32, the brush head cover 28 can also be considered as part of the second brush head. The second connecting structure includes a protrusion 282 disposed on the outer end face of the brush head cover 28 (see...). Figure 4 The protrusion 282 has a non-circular cross-section, and the shape of the groove 323 is correspondingly provided for the protrusion 282, so that the protrusion 282 is restricted by the inner wall of the groove 323 and cannot rotate relative to the groove 323, thereby realizing that the second brush head rotates synchronously with the second connector 32. In one embodiment, the protrusion 282 of the brush head cover 28 is provided with a through hole for a fastener such as a screw to pass through. The fastener passes through the through hole and is screwed into the second brush disk 22, thereby fixing the second brush disk 22 and the brush head cover 28 together. With this structure, the first brush disk 21 is rotatably clamped between the second brush disk 22 and the brush head cover 28, and the first brush disk 21, the second brush disk 22 and the brush head cover 28 are formed into a single unit.

[0048] In one embodiment, the electric cleaning brush 100 further includes a locking member and a locking member mating part, wherein the locking member, the locking member mating part, the first brush head, the second brush head, the first connecting member 31, and the second connecting member 32 satisfy the following relationship:

[0049] The first brush head is connected to the first connector and can move with the first connector. The locking member is connected to one of the second connector and the second brush head. The locking member mating part is disposed on the other of the second connector and the second brush head. The locking member has a locking position where it engages with the locking member mating part and an unlocking position where it disengages from the locking member mating part. When the locking member is in the locking position, the second brush head can move with the second connector; or

[0050] The second brush head is connected to the second connector and can move with the second connector. The locking member is connected to one of the first connector and the first brush head. The locking member mating part is provided on the other of the first connector and the first brush head. The locking member has a locking position that engages with the locking member mating part and an unlocking position that disengages from the locking member mating part. When the locking member is in the locking position, the first brush head can move with the first connector.

[0051] Specifically, in one embodiment, the locking member includes a button 313 slidably connected to the body 311 and a hook 314 connected to the button. The locking member mating part is a hook mating part 216 provided on the first brush head. When the locking member is in the locked position, the hook 314 and the hook mating part 216 cooperate to detachably connect the first brush head to the first connector 31. Specifically, the hook mating part 216 is located on the end face of the back of the first brush disk 21 where the receiving cavity 214 is formed. The hook mating part 216 can be in the shape of a protrusion, which is provided with a recess into which the end of the hook 314 extends. Understandably, in another embodiment, the button 313 can also be rotatably connected to the button 313.

[0052] In one embodiment, the body 311 of the first connector 31 includes an inner wall 315 forming the receiving cavity 312 and an outer wall 316 surrounding the inner wall 315. The outer wall 316 and the inner wall 315 are spaced apart by a certain distance to form a space 317 surrounding the inner wall 315. The first connector 31 also includes a cover 318 covering the space 317. The cover 318 is annular and has a groove 3181 through which the hook engagement portion 216 passes. The outer wall 316 of the first connector 31 has a through hole 3161 through which the button 313 passes.

[0053] In one embodiment, the electric cleaning brush 100 further includes an elastic member 50 disposed between the body 311 and the button 313. The elastic member 50 applies a force to the button 313 to keep the hook 314 and the hook engagement portion 216 in a engaged state. The engaged state is as follows: Figure 8 As shown, at this time, both ends of the elastic member 50 abut against the inner wall 315 and the button 313 respectively. The elastic member 50 applies a pushing force to the hook 314, causing the end of the hook 314 to be tightly locked in the recess of the hook engagement part 216, thereby connecting the first brush plate 21 to the first connecting member 31. When needed, the user can press the button 313 to move the button 313 toward the inner wall 315, so that the hook 314 can finally disengage from the hook engagement part 216. At this time, there is no longer any restriction between the first connecting member 31 and the first brush plate 21, and the user can remove the brush head assembly 20 from the main body 10.

[0054] refer to Figure 8 In one embodiment, with the back side where the hook engagement portion 216 is located (i.e., the end face of the back side of the first brush plate 21 where the protrusion of the receiving cavity 214 is formed) as a reference, the height of the protrusion 282 of the brush head cover 28 is greater than the height of the hook engagement portion 216. This is because, during the installation of the brush head assembly 20, the back side of the first brush plate 21 faces the first connector 31, and the brush head cover 28 connected to the second brush plate 22 faces the second connector 32, gradually approaching the first connector 31 and the second connector 32. The greater height of the protrusion 282 of the brush head cover 28 than the height of the hook engagement portion 216 ensures that the protrusion 282 of the brush head cover 28 first enters the groove 323 of the second connector 32, and then the hook engagement portion 216 passes through the groove 3181 of the cover portion 318 and enters the position where it can engage with the hook 314. This ensures effective engagement between the protrusion 282 and the groove 323, as well as between the hook 314 and the hook engagement portion 216, preventing situations where the hook 314 and the hook engagement portion 216 are connected but the protrusion 282 and the groove 323 are not effectively engaged. Understandably, in another embodiment, the second connection structure includes a groove on the outer end face of the brush head cover 28 and a protrusion on the front face of the second connector 32. The engagement of the groove and the protrusion enables the brush head cover 28 to rotate synchronously with the second connector 32. In this embodiment, the end face of the protrusion and the bottom face of the groove are in contact with each other, and the end face of the protrusion and the bottom face of the groove are higher than the end face of the first connector 31 (specifically, the end face of the cover portion 318) and the back face of the first brush disc 21 (i.e., the surface where the hook engagement portion 216 is located).

[0055] The above embodiments specifically describe the locking member being connected to the first connecting member and the locking member mating part being disposed on the first brush disk. However, as clearly described above, in another embodiment, the locking member may be connected to the first brush disk, and the locking member mating part may be disposed on the first connecting member. In another embodiment, the locking member may be connected to the second connecting member, and the locking member mating part may be disposed on the second brush disk. In yet another embodiment, the locking member may be connected to the second brush disk, and the locking member mating part may be disposed on the second connecting member.

[0056] Understandably, the connection method between the first connector and the first brush disk, as well as the second connector and the second brush disk, is not limited to the aforementioned situations. In another embodiment, the first connector and the first brush disk, as well as the second connector and the second brush disk, can be fixed together by fasteners such as screws. In another embodiment, the first connector and the first brush disk, as well as the second connector and the second brush disk, can be integrally formed and connected together.

[0057] In the above embodiment, the brush head assembly 20 is connected to the main body 10 as a whole. Understandably, in another embodiment, the first brush disc 21 and the second brush disc 22 can be independent components connected to the main body 10 respectively. During the connection process, the first brush disc 21 can first be connected to the first connector 31 via a locking member and a locking member mating part. Note that in this embodiment, the second bearing 27 and the brush head cover 28 are omitted. Then, the first bearing 26 is inserted into the receiving cavity 212 of the first brush disc 21, and then the second brush disc 22 is inserted into the receiving cavity 212 of the first brush disc 21. Finally, the second brush disc 22 is fixed to the second connector 32 by fasteners such as screws.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. An electric cleaning brush, characterized in that, include: The main body, which contains the driving components; A brush head assembly is connected to the main body. The brush head assembly includes a first brush disc, a second brush disc, a first cleaning component, and a second cleaning component. Both the first and second brush discs are connected to the drive assembly. The first brush disc can move along a first direction under the drive of the drive assembly, and the second brush disc can move along a second direction different from the first direction under the drive of the drive assembly. The first cleaning component is connected to the first brush disc, and the second cleaning component is connected to the second brush disc. The ratio of the contact area between the first cleaning component and the surface to be cleaned to the contact area between the second cleaning component and the surface to be cleaned is in the range of 1 / 3 to 3.

2. The electric cleaning brush according to claim 1, characterized in that, The second brush disk is rotatably connected to the first brush disk. The first brush disk has a cleaning component carrier surrounding the second brush disk. The first cleaning component is connected to the cleaning component carrier. The first brush disk and the second brush disk can rotate in different directions under the drive of the drive assembly.

3. The electric cleaning brush according to claim 2, characterized in that, The ratio of the operating speed of the second brush disk to that of the first brush disk is in the range of 1 / 5 to 5.

4. The electric cleaning brush according to claim 3, characterized in that, The ratio of the contact area between the first cleaning component and the surface to be cleaned to the contact area between the second cleaning component and the surface to be cleaned is 1:1, and / or the ratio of the operating speed of the second brush to the operating speed of the first brush is 1:

1.

5. The electric cleaning brush according to claim 1, characterized in that, The first direction is opposite to the second direction.

6. The electric cleaning brush according to claim 1, characterized in that, Both the first and second brush disks are provided with multiple receiving holes. Both the first and second cleaning components include multiple sets of bristles. The bottom ends of the multiple sets of bristles of the first cleaning component are respectively fixed in the multiple receiving holes of the first brush disk, and the bottom ends of the multiple sets of bristles of the second cleaning component are respectively fixed in the multiple receiving holes of the second brush disk. The ratio of the sum of the areas of the multiple receiving holes of the first brush disk to the sum of the areas of the multiple receiving holes of the second brush disk is in the range of 1 / 3 to 3.

7. The electric cleaning brush according to claim 2, characterized in that, The brush head assembly also includes a first bearing disposed between the first brush disk and the second brush disk, wherein the balls of the first bearing are in contact with the first brush disk and the second brush disk.

8. The electric cleaning brush according to claim 1, characterized in that, It also includes a first connector, a second connector, and a transmission module. The second connector is connected to the output end of the drive assembly. The first connector is rotatably connected to the main body and connected to the output end of the drive assembly through the transmission module. The first brush disk is connected to the first connector, and the second brush disk is connected to the second connector.

9. The electric cleaning brush according to claim 8, characterized in that, The transmission module includes a sun gear disposed on the second connector, a plurality of planet gears fixed to the main body, and an internal gear disposed on the first connector. The sun gear meshes with the plurality of planet gears, and the plurality of planet gears also mesh with the internal gear.

10. The electric cleaning brush according to claim 1, characterized in that, The first brush plate has a connection area connected to the first cleaning component, and the second brush plate has a connection area connected to the second cleaning component. The ratio of the connection area of ​​the first brush plate to the connection area of ​​the second brush plate is in the range of 1 / 3 to 3.

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