Electric brush handle and electric brush

Abstract

The present disclosure provides an electric brush handle and an electric brush, wherein the electric brush handle includes a housing, a transmission unit, and a brush head base. The housing is provided with a head portion and a cover body connected to the head portion, the cover body is provided with an opening end and a closed end opposite to each other, and a first accommodation cavity is arranged inside the cover body; and the closed end of the cover body is recessed toward an interior of the head portion, and a side surface of the cover body is located between the opening end and the closed end. The transmission unit is arranged within the head portion; the transmission unit includes a first gear and a second gear engaged with the first gear.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present disclosure claims priority to Chinese patent Application No. 2025204273270, filed with the Chinese Patent Office on Mar. 11, 2025, entitled “ELECTRIC BRUSH HANDLE AND ELECTRIC BRUSH,” the whole contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates to the field of cleaning tools, and specifically, to an electric brush handle and an electric brush.BACKGROUND ART

[0003] Small electric brushes are typically used for cleaning stovetops, kitchen countertops, tile joints, shoes, and the like. During use, a user generally holds the handle of the small electric brush to operate the electric brush. However, the conventional electric brushes usually have the following problems: the vibration is relatively strong, causing strong vibration in the user's hand during use, which can result in difficulty holding the handle, and prolonged use can even lead to hand numbness. In addition, due to the strong vibration of the electric brush head, cleaning liquid under the brush head tends to splash, increasing the difficulty of cleaning.SUMMARY

[0004] An objective of the present disclosure is to provide an electric brush handle and an electric brush.

[0005] An embodiment of the present disclosure provides an electric brush handle, which includes a housing, a transmission unit, and a brush head base. The housing is provided with a head portion and a cover body connected to the head portion, the cover body is provided with an opening end and a closed end opposite to each other, and a first accommodation cavity is arranged inside the cover body; and the closed end of the cover body is recessed toward an interior of the head portion, and a side surface of the cover body is located between the opening end and the closed end. The transmission unit is arranged within the head portion; the transmission unit includes a first gear and a second gear engaged with the first gear; and the first gear is arranged toward the side surface of the cover body, and the second gear is arranged toward the closed end of the cover body. The brush head base is rotatably connected to the cover body, the brush head base is located within the first accommodation cavity of the cover body, and connected to the second gear to rotate synchronously with the second gear; and the brush head base is configured to connect a brush head assembly from one side of the opening end.

[0006] An embodiment of the present disclosure further provides an electric brush, which includes the electric brush handle provided according to the above aspect, where the brush head assembly includes a mounting portion and a connecting portion and a cleaning portion located on two sides of the mounting portion, and the connecting portion is connected to the brush head base.BRIEF DESCRIPTION OF DRAWINGS

[0007] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required in the embodiments of the present disclosure will be briefly described below. It should be understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limitations of the scope. For those of ordinary skill in the art, other related drawings can be obtained according to these drawings without inventive efforts.

[0008] FIG. 1 is a schematic diagram of an electric brush in one perspective view according to an embodiment of the present disclosure;

[0009] FIG. 2 is a schematic diagram of an electric brush in another perspective view according to an embodiment of the present disclosure;

[0010] FIG. 3 is a schematic diagram of a head portion of an electric brush handle according to an embodiment of the present disclosure;

[0011] FIG. 4 is a sectional view of a head portion of an electric brush according to an embodiment of the present disclosure;

[0012] FIG. 5 is an enlarged view of region A in FIG. 4;

[0013] FIG. 6 is a sectional view of an electric brush handle according to an embodiment of the present disclosure;

[0014] FIG. 7 is a sectional view of a head portion of an electric brush handle according to an embodiment of the present disclosure;

[0015] FIG. 8 is a schematic diagram showing arrangement of a first gear and a second gear according to an embodiment of the present disclosure;

[0016] FIG. 9 is a schematic diagram of the electric brush shown in FIG. 1 after removal of a brush head assembly, a cover, and an end cover;

[0017] FIG. 10 is a schematic diagram of the electric brush shown in FIG. 9 after removal of a pressing plate;

[0018] FIG. 11 is a schematic diagram of a structure of a housing body according to an embodiment of the present disclosure;

[0019] FIG. 12 is a sectional view of a head portion of a housing body according to an embodiment of the present disclosure;

[0020] FIG. 13 is a schematic diagram of a brush head assembly according to an embodiment of the present disclosure;

[0021] FIG. 14 is a schematic diagram of a brush head assembly in one perspective view according to another embodiment of the present disclosure; and

[0022] FIG. 15 is a schematic diagram of a brush head assembly shown in FIG. 14 in another perspective view.

[0023] Reference numerals: 100. electric brush handle; 111. head portion; 1111. conical structure; 1112. cylindrical structure; 1113. annular plate-shaped structure; 112. neck portion; 113. handle portion; 1131. anti-slip portion; 120. housing body; 121. first opening; 122. second opening; 123. drainage hole; 130. cover body; 131. first accommodation cavity; 132. closed end; 133. opening end; 134. top plate; 135. transition section; 136. side plate; 137. first shaft sleeve; 140. brush head base; 141. second accommodation cavity; 142. bell-shaped structure; 143. first connecting member; 144. annular plane; 145. flange; 150. transmission unit; 151. first gear; 152. second gear; 1521. gear shaft; 1522. limiting member; 1523. outer peripheral surface; 153. transmission shaft; 160. drive unit; 171. cover; 172. pressing plate; 173. second shaft sleeve; 174. end cover; 180. power supply; 200. brush head assembly; 210. cleaning portion; 220. mounting portion; 230. connecting portion; and 231. second connecting member.DETAILED DESCRIPTION OF EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of embodiments of the present disclosure clearer, the following clearly and completely describes the technical solutions in embodiments of the present disclosure with reference to the drawings in embodiments of the present disclosure. It is clear that the described embodiments are merely some rather than all of embodiments of the present disclosure. The assemblies of embodiments of the present disclosure, as generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

[0025] Therefore, the following detailed descriptions of the embodiments of the present disclosure arranged in the drawings are not intended to limit the scope of the claimed disclosure, but merely to represent selected embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on embodiments of the present disclosure without inventive efforts shall fall within the protection scope of the present disclosure.

[0026] It should be noted that similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one of the drawings, no further definition or explanation is required in the following drawings.

[0027] In the description of the present disclosure, it should be noted that terms such as “center”, “upper”, “lower”, “vertical”, “horizontal”, “inner”, and“outer” indicate positional or orientational relationships based on the orientations or positions shown in the drawings, or based on the orientations or positions customarily used when the product of the present disclosure is placed during use. These terms are provided merely for facilitating the description of the present disclosure and simplifying the description, and are not intended to indicate or imply that the referenced devices or elements must have specific orientations, or must be constructed or operated in specific orientations, and therefore these terms should not be construed as limiting the present disclosure. In addition, the terms “first”, “second”, and “third” are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0028] In addition, terms such as “horizontal”, “vertical”, and “suspended” do not indicate that components are required to be absolutely horizontal or suspended, and the components can be slightly inclined. For example, the term “horizontal” merely indicates that a direction is more horizontal relative to “vertical”, and does not indicate that the structure must be completely horizontal, and the structure can be slightly inclined.

[0029] In the description of the present disclosure, it should also be noted that unless otherwise explicitly specified or limited, the terms “provide”, “mount”, “connect”, and “link” should be understood in a broad sense. For example, the terms can refer to fixed connection, detachable connection, or integral connection; can refer to direct connection or indirect connection through an intermediate medium; and can also refer to communication between two components internally. Those of ordinary skill in the art can interpret specific meanings of the foregoing terms in the present disclosure according to specific cases.

[0030] Generally, some existing electric brushes that can be held and used with one hand generate relatively high noise during use, thereby affecting user experience; and another electric brushes have a head portion with a relatively large size, which is difficult to insert into narrow gaps for use.

[0031] Based on this, the present disclosure provides an electric brush, which, by using a transmission unit with relatively low noise and reasonably providing the position of the transmission unit and the structure of the head portion of the electric brush handle, can achieve a small size of the head portion of the electric brush handle, and provide low noise and weak vibration during use. The head portion of the electric brush corresponds to a location where the brush head assembly is arranged. The head portion of the electric brush includes the head portion of the electric brush handle. Therefore, a small head portion of the electric brush handle can make the head portion of the electric brush small.

[0032] According to a first aspect, an embodiment of the present disclosure provides an electric brush handle, which includes a housing, a transmission unit, and a brush head base. The housing is provided with a head portion and a cover body connected to the head portion, the cover body is provided with an opening end and a closed end opposite to each other, and a first accommodation cavity is arranged inside the cover body; and the closed end of the cover body is recessed toward an interior of the head portion, and a side surface of the cover body is located between the opening end and the closed end. The transmission unit is arranged within the head portion; the transmission unit includes a first gear and a second gear engaged with the first gear; and the first gear is arranged toward the side surface of the cover body, and the second gear is arranged toward the closed end of the cover body. The brush head base is rotatably connected to the cover body, the brush head base is located within the first accommodation cavity of the cover body, and connected to the second gear to rotate synchronously with the second gear; and the brush head base is configured to connect a brush head assembly from one side of the opening end.

[0033] According to the above technical solution, the head portion serves to mount the transmission unit, the closed end of the cover body is recessed toward the interior of the head portion, and a size of the head portion of the electric brush handle is relatively small after the brush head base is arranged within the first accommodation cavity. Since the transmission shaft and the brush head base are in transmission connection through the first gear and the second gear, that is, the brush head base is driven to rotate by the gear, so that the vibration generated during use is reduced, more comfortable handling experience is provided for the user, the problem of cleaning liquid splashing is solved, and the gear-driven rotation produces relatively low noise. In addition, by arranging the first gear to face the side surface of the cover body and the second gear to face the closed end of the cover body, the internal structure of the head portion of the electric brush handle is more compact, thereby reducing the size of the head portion of the electric brush handle.

[0034] In some optional embodiments, the first gear is provided with a first surface facing the cover body, and a distance D1 between the first surface and the cover body is 3-5 mm; and the second gear is provided with a second surface facing the cover body, and a distance D2 between the second surface and the cover body is 1-3 mm.

[0035] According to the above technical solution, when the distances between the first gear and the cover body and between the second gear and the cover body are within the above ranges, the size of the head portion of the electric brush handle is relatively small, the distances between the first gear and the cover body and between the second gear and the cover body are appropriate, the friction between the first gear and the cover body and between the second gear and the cover body is substantially avoided, and further, the electric brush has weak vibration and low noise during use.

[0036] In some optional embodiments, the cover body includes a top plate having a through hole and a side plate along a direction from the closed end to the opening end; the top plate is located at the closed end; the opening end is located at one end of the side plate away from the top plate; the side plate is connected to the head portion; and the top plate is located within the head portion. The second surface is recessed in a direction away from the cover body; and the top plate is located within a recessed region of the second surface.

[0037] According to the above technical solution, the second gear is arranged toward the closed end of the cover body, and the second gear is arranged toward the second surface of the cover body in a recessed manner, so that a shape of the second gear adapts to a shape of the cover body, a structure within the head portion of the electric brush handle is more compact and reasonable, and the electric brush has weak vibration and low noise during use.

[0038] In some optional embodiments, the cover body further includes a transition section having an increased diameter, and the side plate, the transition section, and the top plate are sequentially connected; a side surface of the cover body is located at the side plate and / or the transition section; the first surface is recessed in a direction away from the cover body; and the transition section protrudes toward the first surface in a rotation axis direction of the first gear.

[0039] According to the above technical solution, the cover body has a structure that is small at an upper portion and large at a lower portion. In addition, the first gear is arranged toward the side surface of the cover body, and its first surface is recessed toward the cover body, so that a structure within the head portion of the electric brush handle is more compact and reasonable; and no influence is caused to driving transmission between the first gear and the second gear, and the electric brush has weak vibration and low noise during use.

[0040] In some optional embodiments, the housing is further provided with a handle portion and a neck portion, and the head portion, the neck portion, and the handle portion are sequentially arranged; the electric brush handle further includes a drive unit and a transmission shaft, the drive unit is arranged within the handle portion, the transmission shaft is arranged within the neck portion, one end of the transmission shaft is connected to the drive unit, and the other end of the transmission shaft is connected to the first gear.

[0041] According to the above technical solution, the drive unit is arranged in the handle portion, the transmission shaft is arranged in the neck portion, the first gear is arranged between the head portion and the neck portion, and the second gear is arranged in the head portion, such arrangement enables a layout of the electric brush handle to be more reasonable and facilitates miniaturization. In addition, with the cooperation of the drive mode and rotation driven by the first gear and the second gear, the electric brush has weak vibration and low noise during use.

[0042] In some optional embodiments, the first gear and the second gear are both bevel gears, and an included angle between a rotation axis of the first gear and a rotation axis of the second gear is 10°-80°.

[0043] According to the above technical solution, the first gear and the second gear are both bevel gears, the included angle between the rotation axis of the first gear and the rotation axis of the second gear is within the above range, the first gear is arranged toward a side surface of the cover body, and the second gear is arranged toward a closed end of the cover body, so that an appropriate space is formed between the first gear and the second gear, the space is configured to install the cover body, so as to facilitate the installation of the brush head base, which can make a structure of the head portion more compact. In addition, when the included angle between the rotation axis of the first gear and the rotation axis of the second gear is within the above range, an axis of the handle portion and an axis of the brush head base adaptively form a certain included angle, so that gripping of the handle portion is facilitated a user holds the handle portion during use and fatigue of a hand is reduced during long-term use.

[0044] In some optional embodiments, a tooth number ratio of the second gear to the first gear is within a range of 1.5-3.

[0045] According to the above technical solution, the first gear is arranged between the head portion and the neck portion, the second gear is arranged in the head portion, a size of the neck portion is relatively small, a corresponding size of the first gear is relatively small, so that the structure of the brush handle is relatively compact; and the second gear is relatively large, a corresponding structure of the cover body is relatively large, so that the installation of the brush head base and a brush head assembly is facilitated. In addition, a rotation speed of the second gear is reduced, so as to avoid splashing of cleaning liquid below the brush head assembly during use of the brush head assembly.

[0046] In some optional embodiments, the drive unit includes a motor and a speed reduction assembly; an output shaft of the motor is connected to an input shaft of the speed reduction assembly, and an output shaft of the speed reduction assembly is connected to the transmission shaft; and a transmission ratio of the speed reduction assembly is in a range of 30-40.

[0047] According to the above technical solution, after the deceleration by the speed reduction assembly, the motor can enable the output torque of the brush head base to be relatively appropriate, such that the splashing of cleaning liquid is reduced, the cleaning time is shortened, and the cleanliness is improved.

[0048] In some optional embodiments, one side of the head portion away from the opening end is of a conical structure, an outer peripheral surface of the second gear away from the opening end is a conical surface, and a distance D3 between an inner conical surface of the conical structure of the head portion and the conical surface of the second gear is 0.5-2 mm.

[0049] According to the above technical solution, a portion of the head portion away from the opening end is of a conical structure, such that the conical structure provides a guiding function during insertion of the electric brush handle into a narrow gap. The distance between the inner conical surface of the conical structure and the conical surface of the second gear is within the above range, so that the structure of the head portion of the electric brush handle can be more compact, a possibility of friction between the second gear and the inner conical surface of the conical structure is relatively small, and the electric brush has weak vibration and low noise during use.

[0050] In combination with the first aspect, in some optional embodiments, the head portion further includes a cylindrical structure, the cylindrical structure is connected to one side of the conical structure close to the opening end, the cover body is arranged within the cylindrical structure and is connected to an inner side of the cylindrical structure, and the second gear is arranged within the conical structure.

[0051] According to the above technical solution, the cover body is substantially not exposed, such that an appearance of a brush head is more aesthetic. In addition, the cylindrical structure is easily adapted to a side plate of the cover body, the installation between the cylindrical structure and the cover body is facilitated, and the structure is more compact.

[0052] In combination with the first aspect, in some optional embodiments, the head portion is provided with a drainage hole, and the drainage hole is located at one side of the cover body away from the first gear.

[0053] According to the above technical solution, the drainage hole is arranged at the side of the cover body away from the first gear, so that the liquid entering the head portion of the electric brush handle is easily discharged when a user holds the handle portion. In addition, water accumulates adjacent to the drainage hole during drainage, and since the drainage hole is away from the first gear, the lubrication of the first gear is not substantially affected by accumulated water. Further, in a case where a tail portion of the handle portion is hung up, water is automatically discharged from the drainage hole, so that drainage is more convenient.

[0054] In combination with the first aspect, in some optional embodiments, the second gear is connected with a gear shaft, and one end of the gear shaft extends into the closed end of the cover body and is connected to the brush head base.

[0055] According to the above technical solution, the gear shaft of the second gear is directly extended into the cover body and connected to the gear shaft, so that the brush head base is directly driven to rotate when the second gear rotates. Further, the rotation of the brush head base can be more stable, and the electric brush has weak vibration and low noise during use.

[0056] In combination with the first aspect, in some optional embodiments, the gear shaft is further provided with a limiting member, and the limiting member is located at one side of the second gear away from the cover body, so as to limit relative movement between the gear shaft and the second gear in an axial direction; and the limiting member is a snap ring or a pin.

[0057] According to the above technical solution, by limiting the movement of the second gear relative to the gear shaft through the limiting member, the friction between the second gear and the housing caused by the movement of the second gear relative to the gear shaft is avoided, and the electric brush has weak vibration and low noise during use.

[0058] In combination with the first aspect, in some optional embodiments, the brush head base is configured to detachably connect the brush head assembly; the brush head base includes a bell-shaped structure, an interior of the bell-shaped structure is provided with a second accommodation cavity, and a lower end of the bell-shaped structure is provided with an opening communicating with the second accommodation cavity; and the opening is configured to insert the brush head assembly into the second accommodation cavity.

[0059] According to the above technical solution, the second accommodation cavity of the bell-shaped structure is provided with an opening, and the brush head assembly is inserted into the second accommodation cavity through the opening, such that the installation and removal of the brush head assembly are convenient. In addition, an installation depth of the brush head assembly is relatively appropriate, such that a size of the head portion is smaller, the circumferential matching between the brush head assembly and the brush head base during rotation is better, the rotation of the brush head is more stable, and the electric brush has weak vibration and low noise during use.

[0060] In combination with the first aspect, in some optional embodiments, a manner of detachably connecting the brush head assembly is a magnetic connection, a first connecting member configured to connect with the brush head assembly is arranged in the second accommodation cavity, and the first connecting member is a magnet or a ferromagnetic structural member.

[0061] According to the above technical solution, the brush head assembly is connected to the bell-shaped structure of the brush head base by magnetic attraction, such that the installation and removal of the brush head assembly are convenient, so as to replace a corresponding brush head assembly according to different cleaning requirements.

[0062] In combination with the first aspect, in some optional embodiments, a lower portion of an outer side wall of the bell-shaped structure is provided with a flange, and a gap is formed between an upper portion of the outer side wall of the bell-shaped structure and an inner side wall of the cover body.

[0063] According to the above technical solution, the flange is arranged on the outer side wall of the bell-shaped structure, so that the rotation of the brush head assembly connected to the brush head base is more stable when the brush head base rotates; and a region of the brush head base other than the flange substantially does not contact the cover body, such that the friction between the brush head base and the cover body is small, and the influence on rotation of the brush head base is small. The gap between the upper portion of the outer side wall of the bell-shaped structure and the inner side wall of the cover body avoids contact and friction between the upper portion of the bell-shaped structure and the cover body, and this gap is configured to accommodate lubricating grease, so as to further reduce the friction between the bell-shaped structure and the cover body. Therefore, during use of the electric brush, the rotation of the brush head assembly is more stable, the vibration is weak, and the noise is low.

[0064] In combination with the first aspect, in some optional embodiments, a lower end of the bell-shaped structure has an annular plane, so that the annular plane forms annular surface contact with the brush head assembly when the brush head assembly is connected to the brush head base.

[0065] According to the above technical solution, since the lower end of the bell-shaped structure has the annular plane configured to form the annular surface contact with the brush head assembly, the brush head base is in contact with a mounting portion in a circumferential direction of a rotation direction of the brush head base, so that the force on the brush head assembly after the installation is more uniform. When the brush head assembly tends to deflect in any direction due to force, the brush head base provides better abutting support to the mounting portion of the brush head assembly, so that deflection relative to the bell-shaped structure is less likely to occur.

[0066] In combination with the first aspect, in some optional embodiments, the lower end of the bell-shaped structure extends out of the first accommodation cavity from the opening end of the cover body in a direction away from the second gear.

[0067] According to the above technical solution, in a case where an axial dimension of the head portion is relatively small, an axial space of the second accommodation cavity of the brush head base is increased. After the brush head assembly is installed in the brush head base of the bell-shaped structure, the brush head base provides better circumferential enclosure to the brush head assembly. In this way, during rotation of the brush head assembly, the circumferential matching between the brush head assembly and the brush head base is better, the rotation of a brush head is more stable, and the electric brush has weak vibration and low noise during use.

[0068] According to a second aspect, an embodiment of the present disclosure provides an electric brush, which includes the electric brush handle provided according to the first aspect, where the brush head assembly includes a mounting portion and a connecting portion and a cleaning portion located on two sides of the mounting portion, and the connecting portion is connected to the brush head base.

[0069] According to the above technical solution, the brush head assembly has the cleaning portion, and the cleaning portion is configured to clean a contaminant. Since the brush head base is driven to rotate by means of gear transmission, and then, the brush head assembly is driven to rotate by the brush head base, the vibration generated during use is reduced, the holding comfort for a user is improved, the splashing of cleaning liquid is avoided, and the noise generated by gear-driven rotation is low.

[0070] In combination with the second aspect, in some optional embodiments, the brush head base includes the bell-shaped structure, an interior of the bell-shaped structure has the second accommodation cavity, and a lower portion of the bell-shaped structure has an opening communicating with the second accommodation cavity; a first connecting member is arranged in the second accommodation cavity; and the connecting portion is provided with a second connecting member, and the connecting portion extends into the second accommodation cavity from the opening, so that the first connecting member is connected to the second connecting member.

[0071] According to the above technical solution, the connecting portion extends into the second accommodation cavity from the opening, so that the first connecting member is connected to the second connecting member, thereby achieving the connection between the brush head base and the brush head assembly. In this connection manner, the brush head assembly is directly inserted into the second accommodation cavity to achieve connection, and the operation is convenient. After the connecting portion extends into the second accommodation cavity, the brush head base provides a certain enclosure effect to the connecting portion, so that deflection of the brush head assembly after being subjected to force is further limited.

[0072] In combination with the second aspect, in some optional embodiments, one of the first connecting member and the second connecting member is a magnet, and the other one of the first connecting member and the second connecting member is a ferromagnetic structural member; or both the first connecting member and the second connecting member are magnets.

[0073] According to the above technical solution, the brush head base and the brush head assembly are connected in a magnetic attraction manner through the first connecting member and the second connecting member, so that the installation and removal of the brush head assembly are facilitated, and a corresponding brush head assembly is replaced according to the cleaning of different areas.

[0074] In combination with the second aspect, in some optional embodiments, one of the first connecting member and the second connecting member is an annular structural member, and the other one of the first connecting member and the second connecting member is a block-shaped structural member; or both the first connecting member and the second connecting member are block-shaped structural members. When the connecting portion is connected to the brush head base, one side surface of the first connecting member is arranged opposite to one side surface of the second connecting member.

[0075] According to the above technical solution, the connection in the magnetic attraction manner is achieved when the first connecting member and the second connecting member are the block-shaped structural members or the annular structural members. When the brush head assembly is connected to the brush head base, the surfaces of the first connecting member and the second connecting member are arranged opposite to each other, so that the magnetic force generated between the first connecting member and the second connecting member is greater, and the connection between the brush head assembly and the brush head base is more reliable.

[0076] In combination with the second aspect, in some optional embodiments, the lower portion of the bell-shaped structure is in contact with the mounting portion, and a gap is arranged between the first connecting member and the second connecting member in the rotation axis direction of the brush head base.

[0077] According to the above technical solution, when the lower portion of the bell-shaped structure is in contact with the mounting portion, the movement of the brush head assembly in the rotation axis direction of the brush head base is limited, so that the first connecting member and the second connecting member maintain a gap in this direction. That is, during insertion of the brush head assembly into the second accommodation cavity, the contact between the bell-shaped structure and the mounting portion can serve as a limit, which prevents the contact and collision between the first connecting member and the second connecting member under magnetic attraction, thereby effectively avoiding damage to the magnet.

[0078] In combination with the second aspect, in some optional embodiments, a direction in which the connecting portion is inserted into the second accommodation cavity is defined as an insertion direction, and the sectional contours of the connecting portion and the second accommodation cavity perpendicular to the insertion direction are polygonal, so that the brush head base drives the brush head assembly to rotate.

[0079] According to the above technical solution, since the sectional contours of the connecting portion and the second accommodation cavity perpendicular to the insertion direction are polygonal, the rotation of the brush head base and the brush head assembly is more consistent during synchronous rotation of the brush head base and the brush head assembly, the brush head assembly rotates more smoothly, the vibration during use of the electric brush is avoided, and the cleaning liquid is less likely to splash during cleaning.

[0080] In combination with the second aspect, in some optional embodiments, one side of the mounting portion opposite to the connecting portion is a curved surface protruding in a direction away from the connecting portion; and the cleaning portion includes bristles, and the bristles extend in a direction perpendicular to the curved surface.

[0081] According to the above technical solution, since the bristles extend in a direction perpendicular to the curved surface, the bristles have good durability and are not easily deformed, and an end of the bristles away from the mounting portion extends outward, so that the cleaning of corners is facilitated.

[0082] As shown in FIGS. 1, 2, and 13, the electric brush provided in an embodiment of the present disclosure includes an electric brush handle 100 and a brush head assembly 200 having a cleaning portion 210, where the cleaning portion 210 is configured to perform cleaning by directly contacting a contaminant.

[0083] As shown in FIGS. 1 to 4, the electric brush handle 100 includes a housing, and the housing is a visually observable exterior structure configured for a user to hold. The housing includes a head portion 111 and a cover body 130 connected to the head portion 111. As shown in FIGS. 11 and 12, the cover body 130 has an opening end 133 and a closed end 132 opposite to each other, and the closed end 132 of the cover body 130 is recessed toward the interior of the head portion 111. As shown in FIG. 4, the cover body 130 is rotatably connected with the brush head base 140, and the brush head base 140 is configured to connect the brush head assembly 200 from a side close to the opening end 133, so that the brush head base 140 can rotate together with the brush head assembly 200. Referring to FIGS. 7 and 12, the brush head base 140 is located in the first accommodation cavity 131 of the cover body 130, where the first accommodation cavity 131 of the cover body 130 is formed by the recessed portion of the closed end 132 of the cover body 130 toward the interior of the head portion 111. The opening end 133 of the cover body 130 is configured to mount the brush head base 140 into the first accommodation cavity 131. The closed end 132 of the cover body 130 does not mean that the closed end 132 is completely closed without any through holes, but indicates that the closed end 132 is not configured to allow the brush head base 140 to pass through. Since the closed end 132 of the cover body 130 is recessed toward the interior of the head portion 111, after the brush head base 140 is arranged in the first accommodation cavity 131, a size of the head portion of the electric brush handle 100 is relatively small, and correspondingly, a size of the head portion of the electric brush is also relatively small.

[0084] Referring to FIGS. 6, 7, 9 and 10, the head portion 111 is further provided with a transmission unit 150, and the transmission unit 150 includes a first gear 151 and a second gear 152 engaged with the first gear 151. Referring to FIGS. 7 and 12, the first gear 151 is arranged toward a side surface of the cover body 130, and the second gear 152 is arranged toward the closed end 132 of the cover body 130. The side surface of the cover body 130 is located between the opening end 133 and the closed end 132. Further, the side surface of the cover body 130 is located on an outer side of the cover body 130. The transmission unit 150 in the housing body 120 is in transmission connection with the brush head base 140. Specifically, the second gear 152 is connected to the brush head base 140 to rotate synchronously with the second gear 152. Since the brush head base 140 is driven to rotate through gear transmission, the electric brush exhibits weak vibration and low noise during use.

[0085] The electric brush provided in the present disclosure adopts gear transmission to drive the rotation of the brush head base 140 and the brush head assembly 200, thereby reducing noise during use. Furthermore, according to the arrangement shown in FIG. 7, where the first gear 151 is arranged toward the side surface of the cover body 130 and the second gear 152 is arranged toward the closed end 132 of the cover body 130, the internal structure of the head portion of the electric brush handle 100 is more compact, and the size of the head portion of the electric brush is relatively small.

[0086] In the present disclosure, during operation of the electric brush, the first gear 151 and the second gear 152 rotate relative to the cover body 130. To reduce the possibility of friction between the first gear 151 and the cover body 130 and between the second gear 152 and the cover body 130, in some embodiments, the first gear 151 has a first surface facing the cover body 130, and a distance D1 between the first surface and the cover body 130 is 3-5 mm, specifically 3 mm, 3.6 mm, 4 mm, or 5 mm, where the distance refers to the minimum clearance between the first gear 151 and the cover body 130. The second gear 152 has a second surface facing the cover body 130, and a distance D2 between the second surface and the cover body 130 is 1-3 mm, specifically 1 mm, 1.2 mm, 2 mm, or 3 mm, where the distance refers to the minimum clearance between the second gear 152 and the cover body 130. In the present disclosure, within the distance ranges provided in this embodiment, the possibility of friction between the first gear 151 and the cover body 130 and between the second gear 152 and the cover body 130 is lower, and the structure of the head portion of the electric brush handle 100 is more compact and smaller in size. In other embodiments, the distance between the first surface of the first gear 151 and the cover body 130, and the distance between the second surface of the second gear 152 and the cover body 130 can also fall outside the above ranges.

[0087] In the embodiment shown in FIG. 12, the cover body 130 includes a top plate 134, a transition section 135 with an increased diameter, and a side plate 136 forming a ring in the direction from the closed end 132 to the opening end 133. The top plate 134 is located at the closed end 132. The side surface of the cover body 130 is located on the side plate 136 or on the transition section 135. The opening end 133 is located at an end of the side plate 136 away from the top plate 134. The side plate 136 is connected to the head portion 111, and the connection can specifically be integrally formed. Since the closed end 132 of the cover body 130 is recessed toward the interior of the head portion 111, the top plate 134 is located inside the head portion 111. The top plate 134 is further provided with a through hole to allow the gear shaft 1521 of the second gear 152 to pass through the cover body 130 and connect to the brush head base 140. It should be readily understood that in this embodiment, the top plate 134, the transition section 135, and the side plate 136 together form the first accommodation cavity 131. The lower end of the side plate 136 is the opening end 133 communicating with the first accommodation cavity 131, and the cover body 130 as a whole is of a bell-shaped structure with a uniform wall thickness. In other embodiments, the cover body 130 can adopt other structures. For example, the cover body only includes the side plate and the top plate without the transition section; or the cover body only includes the side plate and the transition section, with the transition section provided with a through hole for the gear shaft of the second gear to pass through. The side plate 136 can also not form a closed ring. As shown in FIG. 4, the left side of the transition section 135 of the cover body 130 is connected to the head portion 111, and the right side of the side plate of the cover body 130 is connected to the head portion 111, forming a structure of the cover body 130 similar to having a notch.

[0088] Further, as shown in FIGS. 7 and 12, the first surface of the first gear 151 and the second surface of the second gear 152 are both recessed in a direction away from the cover body 130. The top plate 134 is located within the recessed area of the second surface, and in the rotation axis direction of the first gear 151, the transition section 135 protrudes toward the first surface. Here, the top plate 134 being located within the recessed area of the second surface means that in the rotation axis direction of the second gear 152, at least a portion of the top plate 134 is located within the space formed by the recessed area of the second surface, so that the size of the head portion of the electric brush in this direction is relatively small. Similarly, in the rotation axis direction of the first gear 151, the protrusion of the transition section 135 toward the first surface can also reduce the size of the head portion of the electric brush in the rotation axis direction of the first gear 151. That is, the structural shapes of the first gear 151 and the second gear 152 are matched to the shape of the cover body 130, allowing the first gear 151 and the second gear 152 to be provided in a limited space, making the internal structure of the electric brush handle 100 more compact and improving space utilization, so that the head portion of the electric brush handle 100 has a smaller size.

[0089] Referring to FIGS. 1 and 2, in an embodiment of the present disclosure, the housing includes a handle portion 113, a neck portion 112, and a head portion 111 sequentially arranged. The handle portion 113 is configured for being gripped by a user, and a non-slip portion 1131 can be arranged on an outer side of the handle portion 113. The head portion 111 is the portion connecting to the brush head base 140. The neck portion 112 is located between the handle portion 113 and the head portion 111, serving to connect the handle portion 113 and the head portion 111. The handle portion of the electric brush is the handle portion of the electric brush handle 100, and the handle portion of the electric brush handle 100 includes the handle portion 113 of the housing. The neck portion of the electric brush is the neck portion of the electric brush handle 100, and the neck portion of the electric brush handle 100 includes the neck portion 112 of the housing. The head portion of the electric brush includes the head portion of the electric brush handle 100 and further includes the brush head assembly 200 connected to the brush head base 140. The head portion of the electric brush handle 100 includes the head portion 111 of the housing, and the head portion 111 of the housing includes the head portion of the housing body 120.

[0090] A drive unit 160 is arranged in the handle portion 113, and a transmission shaft 153 is arranged in the neck portion 112. A second gear 152 is arranged in the head portion 111 and located at a side where the closed end 132 of the cover body 130 is located, and the cover body 130 is located at the head portion 111 of the housing. The drive unit 160 is connected to the transmission shaft 153, the power output by the drive unit 160 drives the brush head base 140 to rotate after passing through the transmission shaft 153, the first gear 151, and the second gear 152, thereby driving a brush head assembly 200 to move.

[0091] In some embodiments of the present disclosure, the first gear 151 and the second gear 152 are both bevel gears, an included angle between a rotation axis of the first gear 151 and a rotation axis of the second gear 152 is α, and α is 10°-80°. Referring to FIG. 8, that is, an included angle formed between a rotation axis of the first gear 151 extending from a first surface toward the cover body 130 and a rotation axis of the second gear 152 extending from a second surface toward the cover body 130 is 10°-80°. When the included angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is smaller, namely closer to 10°, an opening angle of the first surface of the first gear 151 relative to the second surface of the second gear 152 is larger; and when the included angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is larger, namely closer to 80°, the opening angle of the first surface of the first gear 151 relative to the second surface of the second gear 152 is smaller. In this embodiment, the first gear 151 and the second gear 152 are bevel gears, and an included angle between axes of the first gear 151 and the second gear 152 is within the above range. The first gear 151 is arranged toward a side surface of the cover body 130, and the second gear 152 is arranged toward the closed end 132 of the cover body 130, so that a suitable space is formed between the first gear 151 and the second gear 152. The space is configured to mount the cover body 130, so that the installation of the brush head base 140 is facilitated, and a structure of the head portion 111 is more compact. In addition, when the included angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is within the above range, an axis of the handle portion 113 and an axis of the brush head base 140 adaptively form a certain included angle, so that gripping of the handle portion 113 is facilitated when a user holds the handle portion 113 during use, and fatigue of a hand is reduced during long-term use.

[0092] In the embodiments provided by the present disclosure, the first gear 151 and the second gear 152 can be a spur gear and a helical gear. In an embodiment in which the first gear 151 and the second gear 152 are both helical gears, the transmission between the first gear 151 and the second gear 152 is more stable, resulting in lower noise during operation, and under a same axial distance, a tooth length is larger, so that the meshing strength between the first gear 151 and the second gear 152 is increased to enable more secure engagement between the first gear 151 and the second gear 152 and avoid slipping after long-time use.

[0093] In some embodiments, a number of teeth of the first gear 151 is less than a number of teeth of the second gear 152, and correspondingly, a radial dimension of the first gear 151 is less than a radial dimension of the second gear 152. Referring to FIGS. 1 and 7, a gear shaft 1521 of the second gear 152 is connected to the brush head base 140 and drives the brush head base 140 to rotate, and therefore, a dimension of a head portion of an electric brush handle 100 in a direction of a rotation axis of the brush head base 140 (namely a direction of the rotation axis of the second gear 152) is affected not only by a radial dimension of the second gear 152, but also by a radial dimension of the first gear 151. Therefore, since the number of teeth of the first gear 151 is less than the number of teeth of the second gear 152, the head portion of the electric brush handle 100 has a smaller dimension in the direction of the rotation axis of the brush head base 140, thereby enabling application in a narrower gap. In addition, in this embodiment, since the number of teeth of the first gear 151 is less than the number of teeth of the second gear 152, a speed reduction effect is achieved, the torque output by the gear shaft 1521 of the second gear 152 is increased, and more stubborn contaminant is cleaned.

[0094] In some embodiments, a ratio of the number of teeth of the second gear 152 to the number of teeth of the first gear 151 is 1.5-3, specifically 13:7. Under an arrangement manner shown in FIGS. 6 and 7, the first gear 151 is arranged between the head portion 111 and the neck portion 112, the second gear 152 is arranged in the head portion 111, a size of the neck portion 112 is relatively small, and a corresponding size of the first gear 151 is relatively small, so that the structure of the electric brush handle is relatively compact. The second gear 152 is relatively large, and a corresponding structure of the cover body 130 is relatively large, so that the installation of the brush head base 140 and a brush head assembly 200 is facilitated. In addition, a rotation speed of the second gear 152 is reduced, so as to avoid splashing of cleaning liquid below the brush head assembly 200 during use of the brush head assembly 200.

[0095] In some other embodiments, the number of teeth of the first gear 151 can also be less than or equal to the number of teeth of the second gear 152, namely, the ratio of the number of teeth of the second gear 152 to the number of teeth of the first gear 151 can be within other ranges.

[0096] In some embodiments, the drive unit 160 includes a motor and a speed reduction assembly; an output shaft of the motor is connected to an input shaft of the speed reduction assembly, and an output shaft of the speed reduction assembly is connected to the transmission shaft 153; and a transmission ratio of the speed reduction assembly is in a range of 30-40, specifically, 32:1, 35:1, 38:1, or 40:1. In this embodiment, a motor is decelerated by a speed reduction assembly, so that the rotation speeds of the brush head base 140 and the brush head assembly 200 are controlled within a reasonable range, the noise generated is lower, and the load borne by the electric brush during operation is increased, thereby enabling cleaning of relatively stubborn contaminant. Further, the speed reduction assembly can be a gear reduction box, and can also be other existing devices capable of achieving speed reduction. Further, a power source 180 can be arranged in the handle portion 113 to supply power to the drive unit 160. In some other embodiments, the electric brush can also adopt other driving manners and corresponding structures.

[0097] Reference is made to FIGS. 6 and 7, in some embodiments of the present disclosure, a portion of the head portion 111 of the housing away from the opening end 133 of the cover body 130 is a conical structure 1111. An outer peripheral surface 1523 of the second gear 152 away from the opening end 133 is a conical surface, where an outer peripheral surface of the second gear 152 forms a boundary of the second gear 152 in a radial direction. In the embodiments shown in FIGS. 9 and 10, the second gear 152 has two outer peripheral surfaces, a first outer peripheral surface is located at one side of the second gear 152 toward the opening end 133 and surrounds a second surface of the second gear 152 at an inner side, and a second outer peripheral surface 1523 is located at one side of the second gear 152 away from the opening end 133 and connected to the first outer peripheral surface. As shown in FIGS. 7, 9 and 10, an inner conical surface of the conical structure 1111 of the housing is arranged opposite to the conical surface of the second gear 152. Further, a distance D3 between the inner conical surface of the conical structure 1111 of the head portion 111 of the housing and the conical surface of the second gear 152 is 0.5-2 mm, specifically 0.5 mm, 1 mm, 1.5 mm, or 2 mm, where the distance refers to a minimum gap between the conical surface of the second gear 152 and the inner conical surface of the conical structure 1111 of the housing. In this embodiment, a portion of the head portion 111 of the housing away from the opening end 133 is the conical structure, namely, during use of the electric brush, one side of the head portion 111 away from the ground is the conical structure 1111. During insertion of the electric brush into a narrow gap, the conical structure 1111 provides a guiding function. The distance between the inner conical surface of the conical structure 1111 and the conical surface of the second gear 152 is controlled within the above range, so that a structural layout inside the head portion of the electric brush is more compact, a dimension of the head portion of the electric brush is smaller, a possibility of friction between the second gear 152 and the inner conical surface of the conical structure 1111 is smaller, the vibration during use of the electric brush is weaker, and noise is lower.

[0098] Further, referring to FIGS. 1, 2, 4, and 7, the head portion 111 further includes a cylindrical structure 1112, and the cylindrical structure 1112 is connected to one side of the conical structure 1111 close to the opening end 133. The cover body 130 is arranged in the cylindrical structure 1112 and connected to an inner side of the cylindrical structure 1112. In the embodiment shown in FIG. 1, the cylindrical structure 1112 has a cylindrical surface, and an axis of the cylindrical surface coincides with an axis of the cover body 130 and a rotation axis of the brush head base 140. In other embodiments, the cylindrical structure 1112 can also have a prismatic surface. In the embodiments shown in FIGS. 3, 11, and 12, the opening end 133 of the cover body 130 is indirectly connected to the cylindrical structure 1112 through an annular plate-shaped structure 1113. Further, as shown in FIG. 12, the opening end 133 of the cover body 130 can protrude beyond the annular plate-shaped structure 1113. The opening end 133 of the cover body 130 can also be flush with the annular plate-shaped structure 1113. In a flush condition, the cover body 130 is substantially not exposed, so that an appearance of a brush head is more aesthetically pleasing. In addition, the cylindrical structure 1112 is easily adapted to a side plate 136 of the cover body 130, the installation between the cylindrical structure 1112 and the cover body 130 is facilitated, and a structure is more compact. Referring to FIGS. 8 to 12, the conical structure 1111, the cylindrical structure 1112, the annular plate-shaped structure 1113, and the cover body 130 form a certain space, and the second gear 152 is arranged in the space, specifically, the second gear 152 is arranged in the conical structure 1111.

[0099] In some embodiments, as shown in FIGS. 7 and FIGS. 9 to 11, the housing includes a housing body 120 and a cover 171, a head portion of the housing body 120 and a head portion of the cover 171 jointly form a head portion 111 of the housing of the electric brush handle, a neck portion of the housing body 120 and a neck portion of the cover 171 jointly form a neck portion 112 of the housing of the electric brush handle, and a handle portion of the housing body 120 and a handle portion of the cover 171 jointly form a handle portion 113 of the housing of the electric brush handle. The cover body 130 is arranged in the housing body 120 of the head portion 111 and is connected to the housing body 120 of the head portion 111. Optionally, the closed end of the cover body 130 is recessed toward the housing body 120 of the head portion 111, and the cover body 130 is integrally formed with the housing body 120.

[0100] Further, the housing body 120 has a first opening 121 at a side away from the brush head base 140, the first opening 121 is configured to mount the transmission shaft 153 into the neck portion 112 of the housing and to mount the second gear 152 into the head portion 111 of the housing, and the cover 171 is configured to cover the first opening 121. As shown in FIGS. 7 and 12, a conical structure of the head portion 111 of the housing is arranged at a head portion of the cover 171, and a cylindrical structure 1112 of the head portion 111 of the housing is arranged at a head portion of the housing body 120. The housing body 120 further has a second opening 122 at an end away from the head portion 111, namely an end portion of the handle portion 113. The housing body 120 has an installation cavity configured to accommodate the drive unit 160, the second opening 122 communicates with the installation cavity to enable the drive unit 160 to be mounted, and an end cover 174 is further covered on the second opening 122. Optionally, a battery, a circuit board, and the like can further be mounted in the installation cavity to supply electrical energy to a motor and to control rotation of the motor through the circuit board.

[0101] In some embodiments of the present disclosure, the connection between the cover 171 and the housing body 120 fixes the transmission shaft 153 and the second gear 152, where the fixation of the transmission shaft 153 and the second gear 152 means that the second gear 152 and the transmission shaft 153 rotate normally at preset installation positions to drive the brush head base 140 to rotate, rather than that the second gear 152 and the transmission shaft 153 are fixed relative to the housing body 120. Optionally, a transmission shaft sleeve is further arranged in the neck portion of the housing body 120, the transmission shaft 153 is arranged in the transmission shaft sleeve, an inner wall of the housing body 120 is provided with a plurality of snapping grooves arranged sequentially along an axial direction of the transmission shaft 153, and the transmission shaft sleeve is snapped into the snapping grooves to fix the transmission shaft 153, so that the transmission shaft 153 maintains coaxial synchronous rotation with the first gear 151.

[0102] In other embodiments, as shown in FIGS. 7 and 9, a pressing plate 172 can further be arranged between the housing body 120 and the cover 171, and the transmission shaft 153 and the second gear 152 are fixed to the housing body 120 through the pressing plate 172. The pressing plate 172 can be connected to the housing body 120 through threaded fasteners, or the pressing plate 172 can be connected to the cover 171 through threaded fasteners, or other connection manners can be adopted. In this embodiment, the cover 171 only covers the first opening 121 and does not fix the transmission shaft 153 and the second gear 152, and therefore, the cover 171 can be bonded with the housing body 120 or snap-connected with the housing body 120. In addition, an aesthetically designed cover 171 can be used, so that the appearance of the electric brush handle 100 is improved.

[0103] In some embodiments, to facilitate discharge of liquid entering the housing during a cleaning process, the housing body 120 is further provided with a drainage hole 123. The drainage hole 123 can be arranged at the head portion of the electric brush, specifically at the head portion of the electric brush handle 100, at the head portion of the housing body 120, at the neck portion 112 of the electric brush handle 100, or at the neck portion of the housing body 120. In the embodiment shown in FIG. 3, the drainage hole 123 is arranged at the head portion of the electric brush handle 100 and is located at one side of the cover body 130 away from the first gear 151, so that liquid in the head portion is thrown out from the drainage hole 123 by swinging. The drainage hole 123 can be arranged on an annular plate-shaped structure 1113 connecting the cover body 130 and the cylindrical structure 1112, can be arranged on the cylindrical structure 1112 or the conical structure 1111, or at other positions. According to the arrangement of the drainage hole 123 shown in FIG. 3, the drainage hole 123 is away from the first gear 151, water accumulates near the drainage hole 123 during drainage, and lubrication of the first gear 151 is not substantially affected by accumulated water at the drainage hole 123. When the handle portion 113 is hung up at a tail portion, water is discharged automatically from the drainage hole 123, drainage is more convenient, and the drainage hole 123 is not easily observed after installation of the brush head assembly 200, so that appearance of the product is more concise. In other embodiments, the drainage hole 123 can not be provided.

[0104] In an embodiment in which the second gear 152 is in transmission connection with the brush head base 140, the gear shaft 1521 of the second gear 152 is fixedly connected with the brush head base 140 to drive synchronous rotation of the brush head base 140 during rotation of the second gear 152. As shown in FIGS. 7 and 12, the gear shaft 1521 of the second gear 152 extends from the closed end 132 of the cover body 130 into the first accommodation cavity and is connected to the brush head base 140. It should be readily understood that the closed end 132 of the cover body 130 is not completely closed, and a through hole is provided for the gear shaft 1521 to pass through.

[0105] Further, referring to the embodiment shown in FIG. 7, a first shaft sleeve 137 is further arranged at a position of the through hole of the closed end 132, and the gear shaft 1521 of the second gear 152 extends into the first accommodation cavity 131 of the cover body 130 through an inner side of the first shaft sleeve 137. The first shaft sleeve 137 includes an axial section and a radial section connected to each other. The axial section is an annular structure and is configured to be sleeved on an outer side of the gear shaft 1521 to reduce friction. The radial section is an annular plate-shaped structural member and is configured to be hung on the closed end 132 of the cover body 130.

[0106] In some embodiments, the gear shaft 1521 of the second gear 152 can be fixedly connected to the brush head base 140. In other embodiments, the second gear 152 can be fixedly connected to the gear shaft 1521. For example, in some embodiments, the second gear 152 is integrally injection-molded with the gear shaft 1521, and thereafter the second gear 152 is mounted on the gear shaft 1521. In some other embodiments, the second gear 152 and the gear shaft 1521 are formed as an integral structure, and thereafter the brush head base 140 is connected. Those skilled in the art select a connection manner among the brush head base 140, the second gear 152, and the gear shaft 1521 according to assembly difficulty.

[0107] In some embodiments, the gear shaft 1521 is further provided with a limiting member 1522, and the limiting member 1522 is located at one side of the second gear 152 away from the cover body 130 to limit relative movement between the gear shaft 1521 and the second gear 152 in an axial direction. The axial movement of the second gear 152 on the gear shaft 1521 is limited by disposing the limiting member 1522, so that the first gear 151 and the second gear 152 are maintained at a proper meshing position, thereby making transmission between the first gear 151 and the second gear 152 more stable and reducing noise. The limiting member 1522 is a snap ring or a pin.

[0108] In the embodiments shown in FIGS. 7 and 10, the pressing plate 172 is provided with a second shaft sleeve 173, and after the pressing plate 172 fixes the second gear 152 to the housing body 120, an end of the gear shaft 1521 of the second gear 152 away from the brush head base 140 is located within the second shaft sleeve 173.

[0109] In some embodiments, as shown in FIGS. 4 and 7, the brush head base 140 includes a bell-shaped structure 142, an interior of the bell-shaped structure 142 has a second accommodation cavity 141, a lower end has an opening communicating with the second accommodation cavity 141, and the opening is configured to mount the brush head assembly 200 into the second accommodation cavity 141. The brush head assembly 200 is not entirely mounted into the second accommodation cavity 141 as a whole, and a portion of the brush head assembly 200 is located within the second accommodation cavity 141 to be connected to the brush head base 140. The cleaning portion 210 is located outside the second accommodation cavity 141 to facilitate cleaning of contaminant. A lower portion of the bell-shaped structure 142 refers to a portion close to the cleaning portion 210, and a lower end refers to an end close to the cleaning portion 210. In this embodiment, the brush head assembly 200 is mounted through the opening at the lower end of the second accommodation cavity 141, so that the installation and removal of the brush head assembly 200 are relatively convenient. Further, an installation depth of the brush head assembly 200 is reasonable, so that the head portion 111 has a smaller size, and the circumferential matching between the brush head assembly 200 and the brush head base 140 during rotation is improved, the rotation of the brush head is more stable, the vibration is weak, and the noise is low during use of the electric brush.

[0110] Further, in other embodiments, the brush head base 140 can be a plate-shaped structure, the plate-shaped structure is connected to the gear shaft 1521 of the second gear 152, and the plate-shaped structure is further connected to the brush head assembly 200. The brush head base can also be the gear shaft 1521 of the second gear 152, a connecting portion 230 in the brush head assembly 200 has a groove configured for insertion of the gear shaft 1521, and the connecting portion 230 extends into the cover body 130 and is connected with the gear shaft 1521 by insertion.

[0111] Further, the brush head base 140 and the brush head assembly 200 are in detachable connection to facilitate replacement of the brush head assembly 200 for different application scenarios. In other embodiments, the brush head base 140 and the brush head assembly 200 are in fixed connection, that is, the cleaning portion 210 of each electric brush is not replaceable. In other embodiments, the brush head base 140 can also have other structural shapes. For example, the brush head base 140 is a solid cylindrical body and does not have the second accommodation cavity 141 for accommodating the brush head assembly 200.

[0112] In some embodiments, as shown in FIGS. 13 to 15, the brush head assembly 200 includes a mounting portion 220, one side of the mounting portion 220 is provided with the cleaning portion 210, and an opposite side is provided with the connecting portion 230. The connecting portion 230 can extend into the second accommodation cavity 141 from the opening at the lower end of the second accommodation cavity 141 to be connected with the brush head base 140. The cleaning portion 210 is a portion directly contacting a contaminant during operation of the electric brush. The cleaning portion 210 can be bristles or a cleaning cloth. The mounting portion 220 is a structure configured to mount the cleaning portion 210, and the mounting portion 220 has a smaller dimension in a thickness direction. A specific shape of the mounting portion 220 can be a planar plate-like structural member or a shell-like structural member having a spherical surface. The connecting portion 230 is a portion configured to be connected with the brush head base 140. Specifically, the connecting portion 230 can be configured to be directly connected with the brush head base 140 or configured to mount a connecting member for connecting the brush head base 140. In the embodiments shown in FIGS. 14 and 15, one side of the mounting portion 220 away from the connecting portion 230 is an arc surface protruding in a direction away from the connecting portion 230. The cleaning portion 210 is bristles, and the bristles extend in a direction perpendicular to the arc surface.

[0113] A direction in which the connecting portion 230 is mounted into the second accommodation cavity 141 from the opening at the lower end of the bell-shaped structure 142 is defined as an insertion direction (that is, a direction indicated by arrow B in FIG. 8). A sectional contour of the connecting portion 230 and a sectional contour of the second accommodation cavity 141 in a direction perpendicular to the insertion direction are both polygonal, so that the brush head base 140 can transmit torque to the connecting portion 230 of the brush head assembly 200, and the brush head base 140 drives the brush head assembly 200 to rotate. Specifically, a section can be quadrilateral or hexagonal. Since the sectional contours of the connecting portion 230 and the second accommodation cavity 141 perpendicular to the insertion direction are polygonal, and the rotation of the brush head base 140 and the brush head assembly 200 is more consistent during synchronous rotation of the brush head base 140 and the brush head assembly 200, the brush head assembly 200 rotates more smoothly, the vibration during use of the electric brush is reduced, and the cleaning liquid is less likely to splash during cleaning.

[0114] Further, the second accommodation cavity 141 of the bell-shaped structure 142 is provided with a first connecting member 143, and the connecting portion 230 is provided with a second connecting member 231. In embodiments in which the brush head assembly 200 and the brush head base 140 are detachably connected, the first connecting member 143 and the second connecting member 231 are magnetically connected. One of the first connecting member 143 and the second connecting member 231 is a magnet, and the other one is a ferromagnetic structural member. For example, the first connecting member 143 is a magnet, and the second connecting member 231 is an iron, cobalt, or nickel structural member. In other embodiments, both the first connecting member 143 and the second connecting member 231 are magnets. In other embodiments, the first connecting member 143 is an iron, cobalt, or nickel structural member, and the second connecting member 231 is a magnet. Further, the first connecting member 143 and the bell-shaped structure 142 are connected by adhesive bonding, interference fit, or injection molding. Similarly, the second connecting member 231 and the connecting portion 230 of the brush head assembly 200 are connected by adhesive bonding, interference fit, or injection molding. In other embodiments in which the brush head assembly 200 and the brush head base 140 are detachably connected, the connecting portion 230 of the brush head assembly 200 and the bell-shaped structure 142 of the brush head base 140 are connected by snapping connection or insertion connection.

[0115] In the present disclosure, the brush head base 140 mainly transmits torque to the brush head assembly 200. During operation of the electric brush, a force applied to the brush head assembly 200 in a direction of the rotation axis of the brush head base 140 is also directed toward the brush head base 140, and the separation of the brush head assembly 200 from the brush head base 140 is avoided. Therefore, even if only one of the brush head assembly 200 and the brush head base 140 is provided with a magnet, the requirements for normal operation of the electric brush are satisfied.

[0116] In embodiments in which the connection between the brush head base 140 and the brush head assembly 200 is achieved by magnetic force between the first connecting member 143 and the second connecting member 231, the first connecting member 143 and the second connecting member 231 can be block-shaped structural members. For example, the first connecting member 143 is a block-shaped magnet, and the second connecting member 231 is an iron block. In other embodiments, both the first connecting member 143 and the second connecting member 231 are annular structural members. In other embodiments, one of the first connecting member 143 and the second connecting member 231 is an annular structural member, and the other one is a block-shaped structural member.

[0117] To make magnetic connection between the brush head base 140 and the brush head assembly 200 more reliable, as shown in FIG. 4, when the connecting portion 230 is connected to the brush head base 140, one side surface of the first connecting member 143 and one side surface of the second connecting member 231 are oppositely arranged, so that magnetic force between the first connecting member 143 and the second connecting member 231 is increased.

[0118] In some embodiments, as shown in FIG. 5, when the connecting portion 230 is connected to the brush head base 140, a lower portion of the bell-shaped structure 142 is in contact with the mounting portion 220, and the first connecting member 143 and the second connecting member 231 have a gap in a direction of the rotation axis of the brush head base 140. In this embodiment, when the lower portion of the bell-shaped structure 142 is in contact with the mounting portion 220, the movement of the brush head assembly 200 in the direction of the rotation axis of the brush head base 140 is limited, and a state in which the first connecting member 143 and the second connecting member 231 have a gap in this direction is maintained. That is, during the insertion of the brush head assembly 200 into the second accommodation cavity 141, the contact between the bell-shaped structure 142 and the mounting portion 220 can serve as a limit, which prevents the collision between the first connecting member 143 and the second connecting member 231 under magnetic attraction, thereby effectively avoiding damage to the magnet.

[0119] Optionally, the connecting portion 230 is a protruding block protruding from the mounting portion 220 in a direction away from the cleaning portion 210. An outer peripheral shape of a section of the protruding block is polygonal, including a quadrilateral or a hexagon. An interior of the protruding block is provided with a groove recessed toward the cleaning portion 210. A magnet is embedded in the groove. A polygonal mounting slot is arranged in the second accommodation cavity 141 of the brush head base 140. A shape of the mounting slot is adapted to a shape of the protruding block. Another magnet is arranged in the mounting slot. When the brush head assembly 200 is installed, the protruding block of the connecting portion 230 is embedded in the mounting slot of the brush head base 140, and two magnets are magnetically connected. A surface of the magnet in the protruding block is located inside the protruding block. When the protruding block is embedded in the mounting slot for magnetic connection, an end portion of the protruding block is in contact with a bottom surface of the mounting slot, and a gap is formed between the two magnets.

[0120] Further, referring to FIGS. 3 and 5, a lower end of the bell-shaped structure 142 is provided with an annular plane 144. When the connecting portion 230 is connected to the brush head base 140, the annular plane 144 of the bell-shaped structure 142 forms annular surface contact with the mounting portion 220. During use of the electric brush, an interaction force in a direction of a rotation axis of the brush head base 140 exists between the brush head assembly 200 and the brush head base 140. When the annular plane 144 of the bell-shaped structure 142 forms annular surface contact with the mounting portion 220, the force applied to the mounting portion 220 is more uniform. When the brush head assembly 200 tends to deflect in any direction due to force, the brush head base 140 provides effective abutting to the mounting portion 220 of the brush head assembly 200, so that the deflection relative to the bell-shaped structure 142 is less likely to occur, thereby reducing deflection of the brush head assembly 200 after being subjected to force. The deflection of the brush head assembly 200 refers to a condition in which a rotation axis of the brush head assembly 200 (such as a rotation axis of the connecting portion 230) is not parallel to the rotation axis of the brush head base 140. In a normal working state, the brush head assembly 200 is driven to rotate by the brush head base 140. Therefore, the rotation axis of the brush head assembly 200 is parallel to the rotation axis of the brush head base 140.

[0121] In other embodiments, the lower end of the bell-shaped structure 142 can be provided with a plurality of planes arranged at intervals along a circumference. When the connecting portion 230 is connected to the brush head base 140, the contact surfaces between the bell-shaped structure 142 and the mounting portion 220 are distributed at intervals along the circumference.

[0122] Further, in some embodiments, the lower end of the bell-shaped structure 142 extends out of the first accommodation cavity 131 from the opening end 133 of the cover body 130 in a direction away from the second gear 152. When the electric brush operates, the cover body 130 does not rotate, and the brush head assembly 200 and the bell-shaped structure 142 of the brush head base 140 rotate. When the lower end of the bell-shaped structure 142 extends out of the first accommodation cavity 131 from the opening end 133 of the cover body 130, the contact between the brush head assembly 200 and the bell-shaped structure 142 of the brush head base 140 enables a gap between the brush head assembly 200 and the cover body 130 of the housing body 120, thereby reducing friction during rotation of the brush head assembly 200, so that rotation of the brush head assembly 200 is more stable, the vibration is weaker, and the noise is lower during use of the electric brush. In addition, in a case where an axial dimension of the head portion 111 is relatively small, an axial space of the second accommodation cavity 141 of the brush head base 140 is increased. After the brush head assembly 200 is installed in the brush head base 140 of the bell-shaped structure 142, the brush head base 140 provides better circumferential enclosure to the brush head assembly 200. In this way, during rotation of the brush head assembly 200, the circumferential matching between the brush head assembly 200 and the brush head base 140 is better, the rotation of a brush head is more stable, and the electric brush has weak vibration and low noise during use.

[0123] Further, referring to FIG. 5, a flange 145 is arranged on a lower portion of an outer side wall of the bell-shaped structure 142. A gap is formed between an upper portion of the outer side wall of the bell-shaped structure 142 and an inner side wall of the cover body 130. By providing the flange 145 on the outer side wall of the bell-shaped structure 142, a position at which the friction may occur between the bell-shaped structure 142 and the cover body 130 is located at the flange 145, rather than an entire outer side surface of the bell-shaped structure 142 contacting the cover body 130. Even if the friction occurs between the bell-shaped structure 142 and the cover body 130, the required friction force to be overcome is small and a cleaning process is not interrupted. In the embodiment shown in FIG. 5, the lubricating grease is arranged in the gap between the upper portion of the outer side wall of the bell-shaped structure 142 and the inner side wall of the cover body 130. The lubricating grease penetrates between the flange 145 and the cover body 130 to provide lubrication, thereby reducing friction, so that the rotation of the brush head assembly 200 is more stable, the vibration is weaker, and the noise is lower during use of the electric brush.

[0124] In some embodiments, the flange 145 arranged on the outer side wall of the bell-shaped structure 142 is a closed annular structure, that is, the flange 145 is closed along a circumferential direction of the bell-shaped structure 142. In other embodiments, the flange 145 can also be a plurality of protrusions arranged at intervals along the circumference on the outer peripheral surface 1523 of the bell-shaped structure.

[0125] An embodiment of the present disclosure provides an electric brush including a housing, a transmission unit 150, a brush head base 140, and a brush head assembly 200. The housing has a head portion 111 and a cover body 130 connected to the head portion 111. The cover body 130 has an opening end 133 and a closed end 132 opposite to each other. A first accommodation cavity 131 is arranged inside the cover body 130. The closed end 132 of the cover body 130 is recessed toward an interior of the head portion 111. A side surface of the cover body 130 is located between the opening end 133 and the closed end 132. The transmission unit 150 is arranged in the head portion 111. A first gear 151 of the transmission unit 150 is arranged toward the side surface of the cover body 130. A second gear 152 of the transmission unit 150 is arranged toward the closed end 132 of the cover body 130. The first gear 151 and the second gear 152 are both bevel gears. An included angle between a rotation axis of the first gear 151 and a rotation axis of the second gear 152 is 10°-80°. The brush head base 140 is rotatably connected to the cover body 130. The brush head base 140 is located in the first accommodation cavity 131 of the cover body 130 and is connected to the second gear 152 to rotate synchronously with the second gear 152. The brush head base 140 is a bell-shaped structure. An interior of the bell-shaped structure is provided with a second accommodation cavity 141. A lower end of the bell-shaped structure is provided with an opening communicating with the second accommodation cavity 141. A magnet connected to the bell-shaped structure is arranged in the second accommodation cavity 141. The brush head assembly 200 includes a mounting portion 220 and a connecting portion 230 and a cleaning portion 210 located on two sides of the mounting portion 220. Different cleaning portions 210 are arranged on the mounting portion 220, including brushes having different lengths or sizes or cloth brushes to meet cleaning requirements of different positions. Another magnet is arranged on the connecting portion 230. The connecting portion 230 of the brush head assembly 200 extends into the second accommodation cavity 141 from the opening to be magnetically connected with the magnet in the second accommodation cavity 141. In the electric brush, a suitable space is formed between the first gear 151 and the second gear 152, and the space is configured for installing the cover body 130 to facilitate installation of the brush head base 140, thereby making the structure of the head portion 111 more compact; and the brush head assembly 200 is connected to the bell-shaped structure of the brush head base 140 by magnetic attraction, making the installation and removal of the brush head assembly 200 more convenient, so as to replace the corresponding brush head assembly 200 according to different cleaning requirements.

[0126] The above-described contents are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure can be modified and varied. Any modification, equivalent replacement, improvement, or the like made without departing from the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.INDUSTRIAL APPLICABILITY

[0127] The electric brush handle and the electric brush provided in the present disclosure are applicable for cleaning tasks in various scenarios, such as kitchens, bathrooms, tile joints, and shoe uppers. The brush head assembly is driven to rotate through gear transmission, providing a compact structure, a small head size, and a reasonable gear layout. A detachable connection method, such as magnetic attraction, can be adopted between the brush head assembly and the brush head base, facilitating the replacement of corresponding brush head assemblies according to cleaning requirements, thereby enhancing the applicability and practicality of the product. The electric brush has a simple structure, is easy to manufacture, and is convenient to use, making it suitable for industrial production and promotion.

Examples

Embodiment Construction

[0024]To make the objectives, technical solutions, and advantages of embodiments of the present disclosure clearer, the following clearly and completely describes the technical solutions in embodiments of the present disclosure with reference to the drawings in embodiments of the present disclosure. It is clear that the described embodiments are merely some rather than all of embodiments of the present disclosure. The assemblies of embodiments of the present disclosure, as generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

[0025]Therefore, the following detailed descriptions of the embodiments of the present disclosure arranged in the drawings are not intended to limit the scope of the claimed disclosure, but merely to represent selected embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on embodiments of the present disclosure without inv...

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present disclosure claims priority to Chinese patent Application No. 2025204273270, filed with the Chinese Patent Office on Mar. 11, 2025, entitled “ELECTRIC BRUSH HANDLE AND ELECTRIC BRUSH,” the whole contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates to the field of cleaning tools, and specifically, to an electric brush handle and an electric brush.BACKGROUND ART

[0003] Small electric brushes are typically used for cleaning stovetops, kitchen countertops, tile joints, shoes, and the like. During use, a user generally holds the handle of the small electric brush to operate the electric brush. However, the conventional electric brushes usually have the following problems: the vibration is relatively strong, causing strong vibration in the user's hand during use, which can result in difficulty holding the handle, and prolonged use can even lead to hand numbness. In addition, due to the strong vibration of the electric brush head, cleaning liquid under the brush head tends to splash, increasing the difficulty of cleaning.SUMMARY

[0004] An objective of the present disclosure is to provide an electric brush handle and an electric brush.

[0005] An embodiment of the present disclosure provides an electric brush handle, which includes a housing, a transmission unit, and a brush head base. The housing is provided with a head portion and a cover body connected to the head portion, the cover body is provided with an opening end and a closed end opposite to each other, and a first accommodation cavity is arranged inside the cover body; and the closed end of the cover body is recessed toward an interior of the head portion, and a side surface of the cover body is located between the opening end and the closed end. The transmission unit is arranged within the head portion; the transmission unit includes a first gear and a second gear engaged with the first gear; and the first gear is arranged toward the side surface of the cover body, and the second gear is arranged toward the closed end of the cover body. The brush head base is rotatably connected to the cover body, the brush head base is located within the first accommodation cavity of the cover body, and connected to the second gear to rotate synchronously with the second gear; and the brush head base is configured to connect a brush head assembly from one side of the opening end.

[0006] An embodiment of the present disclosure further provides an electric brush, which includes the electric brush handle provided according to the above aspect, where the brush head assembly includes a mounting portion and a connecting portion and a cleaning portion located on two sides of the mounting portion, and the connecting portion is connected to the brush head base.BRIEF DESCRIPTION OF DRAWINGS

[0007] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required in the embodiments of the present disclosure will be briefly described below. It should be understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limitations of the scope. For those of ordinary skill in the art, other related drawings can be obtained according to these drawings without inventive efforts.

[0008] FIG. 1 is a schematic diagram of an electric brush in one perspective view according to an embodiment of the present disclosure;

[0009] FIG. 2 is a schematic diagram of an electric brush in another perspective view according to an embodiment of the present disclosure;

[0010] FIG. 3 is a schematic diagram of a head portion of an electric brush handle according to an embodiment of the present disclosure;

[0011] FIG. 4 is a sectional view of a head portion of an electric brush according to an embodiment of the present disclosure;

[0012] FIG. 5 is an enlarged view of region A in FIG. 4;

[0013] FIG. 6 is a sectional view of an electric brush handle according to an embodiment of the present disclosure;

[0014] FIG. 7 is a sectional view of a head portion of an electric brush handle according to an embodiment of the present disclosure;

[0015] FIG. 8 is a schematic diagram showing arrangement of a first gear and a second gear according to an embodiment of the present disclosure;

[0016] FIG. 9 is a schematic diagram of the electric brush shown in FIG. 1 after removal of a brush head assembly, a cover, and an end cover;

[0017] FIG. 10 is a schematic diagram of the electric brush shown in FIG. 9 after removal of a pressing plate;

[0018] FIG. 11 is a schematic diagram of a structure of a housing body according to an embodiment of the present disclosure;

[0019] FIG. 12 is a sectional view of a head portion of a housing body according to an embodiment of the present disclosure;

[0020] FIG. 13 is a schematic diagram of a brush head assembly according to an embodiment of the present disclosure;

[0021] FIG. 14 is a schematic diagram of a brush head assembly in one perspective view according to another embodiment of the present disclosure; and

[0022] FIG. 15 is a schematic diagram of a brush head assembly shown in FIG. 14 in another perspective view.

[0023] Reference numerals: 100. electric brush handle; 111. head portion; 1111. conical structure; 1112. cylindrical structure; 1113. annular plate-shaped structure; 112. neck portion; 113. handle portion; 1131. anti-slip portion; 120. housing body; 121. first opening; 122. second opening; 123. drainage hole; 130. cover body; 131. first accommodation cavity; 132. closed end; 133. opening end; 134. top plate; 135. transition section; 136. side plate; 137. first shaft sleeve; 140. brush head base; 141. second accommodation cavity; 142. bell-shaped structure; 143. first connecting member; 144. annular plane; 145. flange; 150. transmission unit; 151. first gear; 152. second gear; 1521. gear shaft; 1522. limiting member; 1523. outer peripheral surface; 153. transmission shaft; 160. drive unit; 171. cover; 172. pressing plate; 173. second shaft sleeve; 174. end cover; 180. power supply; 200. brush head assembly; 210. cleaning portion; 220. mounting portion; 230. connecting portion; and 231. second connecting member.DETAILED DESCRIPTION OF EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of embodiments of the present disclosure clearer, the following clearly and completely describes the technical solutions in embodiments of the present disclosure with reference to the drawings in embodiments of the present disclosure. It is clear that the described embodiments are merely some rather than all of embodiments of the present disclosure. The assemblies of embodiments of the present disclosure, as generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

[0025] Therefore, the following detailed descriptions of the embodiments of the present disclosure arranged in the drawings are not intended to limit the scope of the claimed disclosure, but merely to represent selected embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on embodiments of the present disclosure without inventive efforts shall fall within the protection scope of the present disclosure.

[0026] It should be noted that similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one of the drawings, no further definition or explanation is required in the following drawings.

[0027] In the description of the present disclosure, it should be noted that terms such as “center”, “upper”, “lower”, “vertical”, “horizontal”, “inner”, and“outer” indicate positional or orientational relationships based on the orientations or positions shown in the drawings, or based on the orientations or positions customarily used when the product of the present disclosure is placed during use. These terms are provided merely for facilitating the description of the present disclosure and simplifying the description, and are not intended to indicate or imply that the referenced devices or elements must have specific orientations, or must be constructed or operated in specific orientations, and therefore these terms should not be construed as limiting the present disclosure. In addition, the terms “first”, “second”, and “third” are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0028] In addition, terms such as “horizontal”, “vertical”, and “suspended” do not indicate that components are required to be absolutely horizontal or suspended, and the components can be slightly inclined. For example, the term “horizontal” merely indicates that a direction is more horizontal relative to “vertical”, and does not indicate that the structure must be completely horizontal, and the structure can be slightly inclined.

[0029] In the description of the present disclosure, it should also be noted that unless otherwise explicitly specified or limited, the terms “provide”, “mount”, “connect”, and “link” should be understood in a broad sense. For example, the terms can refer to fixed connection, detachable connection, or integral connection; can refer to direct connection or indirect connection through an intermediate medium; and can also refer to communication between two components internally. Those of ordinary skill in the art can interpret specific meanings of the foregoing terms in the present disclosure according to specific cases.

[0030] Generally, some existing electric brushes that can be held and used with one hand generate relatively high noise during use, thereby affecting user experience; and another electric brushes have a head portion with a relatively large size, which is difficult to insert into narrow gaps for use.

[0031] Based on this, the present disclosure provides an electric brush, which, by using a transmission unit with relatively low noise and reasonably providing the position of the transmission unit and the structure of the head portion of the electric brush handle, can achieve a small size of the head portion of the electric brush handle, and provide low noise and weak vibration during use. The head portion of the electric brush corresponds to a location where the brush head assembly is arranged. The head portion of the electric brush includes the head portion of the electric brush handle. Therefore, a small head portion of the electric brush handle can make the head portion of the electric brush small.

[0032] According to a first aspect, an embodiment of the present disclosure provides an electric brush handle, which includes a housing, a transmission unit, and a brush head base. The housing is provided with a head portion and a cover body connected to the head portion, the cover body is provided with an opening end and a closed end opposite to each other, and a first accommodation cavity is arranged inside the cover body; and the closed end of the cover body is recessed toward an interior of the head portion, and a side surface of the cover body is located between the opening end and the closed end. The transmission unit is arranged within the head portion; the transmission unit includes a first gear and a second gear engaged with the first gear; and the first gear is arranged toward the side surface of the cover body, and the second gear is arranged toward the closed end of the cover body. The brush head base is rotatably connected to the cover body, the brush head base is located within the first accommodation cavity of the cover body, and connected to the second gear to rotate synchronously with the second gear; and the brush head base is configured to connect a brush head assembly from one side of the opening end.

[0033] According to the above technical solution, the head portion serves to mount the transmission unit, the closed end of the cover body is recessed toward the interior of the head portion, and a size of the head portion of the electric brush handle is relatively small after the brush head base is arranged within the first accommodation cavity. Since the transmission shaft and the brush head base are in transmission connection through the first gear and the second gear, that is, the brush head base is driven to rotate by the gear, so that the vibration generated during use is reduced, more comfortable handling experience is provided for the user, the problem of cleaning liquid splashing is solved, and the gear-driven rotation produces relatively low noise. In addition, by arranging the first gear to face the side surface of the cover body and the second gear to face the closed end of the cover body, the internal structure of the head portion of the electric brush handle is more compact, thereby reducing the size of the head portion of the electric brush handle.

[0034] In some optional embodiments, the first gear is provided with a first surface facing the cover body, and a distance D1 between the first surface and the cover body is 3-5 mm; and the second gear is provided with a second surface facing the cover body, and a distance D2 between the second surface and the cover body is 1-3 mm.

[0035] According to the above technical solution, when the distances between the first gear and the cover body and between the second gear and the cover body are within the above ranges, the size of the head portion of the electric brush handle is relatively small, the distances between the first gear and the cover body and between the second gear and the cover body are appropriate, the friction between the first gear and the cover body and between the second gear and the cover body is substantially avoided, and further, the electric brush has weak vibration and low noise during use.

[0036] In some optional embodiments, the cover body includes a top plate having a through hole and a side plate along a direction from the closed end to the opening end; the top plate is located at the closed end; the opening end is located at one end of the side plate away from the top plate; the side plate is connected to the head portion; and the top plate is located within the head portion. The second surface is recessed in a direction away from the cover body; and the top plate is located within a recessed region of the second surface.

[0037] According to the above technical solution, the second gear is arranged toward the closed end of the cover body, and the second gear is arranged toward the second surface of the cover body in a recessed manner, so that a shape of the second gear adapts to a shape of the cover body, a structure within the head portion of the electric brush handle is more compact and reasonable, and the electric brush has weak vibration and low noise during use.

[0038] In some optional embodiments, the cover body further includes a transition section having an increased diameter, and the side plate, the transition section, and the top plate are sequentially connected; a side surface of the cover body is located at the side plate and / or the transition section; the first surface is recessed in a direction away from the cover body; and the transition section protrudes toward the first surface in a rotation axis direction of the first gear.

[0039] According to the above technical solution, the cover body has a structure that is small at an upper portion and large at a lower portion. In addition, the first gear is arranged toward the side surface of the cover body, and its first surface is recessed toward the cover body, so that a structure within the head portion of the electric brush handle is more compact and reasonable; and no influence is caused to driving transmission between the first gear and the second gear, and the electric brush has weak vibration and low noise during use.

[0040] In some optional embodiments, the housing is further provided with a handle portion and a neck portion, and the head portion, the neck portion, and the handle portion are sequentially arranged; the electric brush handle further includes a drive unit and a transmission shaft, the drive unit is arranged within the handle portion, the transmission shaft is arranged within the neck portion, one end of the transmission shaft is connected to the drive unit, and the other end of the transmission shaft is connected to the first gear.

[0041] According to the above technical solution, the drive unit is arranged in the handle portion, the transmission shaft is arranged in the neck portion, the first gear is arranged between the head portion and the neck portion, and the second gear is arranged in the head portion, such arrangement enables a layout of the electric brush handle to be more reasonable and facilitates miniaturization. In addition, with the cooperation of the drive mode and rotation driven by the first gear and the second gear, the electric brush has weak vibration and low noise during use.

[0042] In some optional embodiments, the first gear and the second gear are both bevel gears, and an included angle between a rotation axis of the first gear and a rotation axis of the second gear is 10°-80°.

[0043] According to the above technical solution, the first gear and the second gear are both bevel gears, the included angle between the rotation axis of the first gear and the rotation axis of the second gear is within the above range, the first gear is arranged toward a side surface of the cover body, and the second gear is arranged toward a closed end of the cover body, so that an appropriate space is formed between the first gear and the second gear, the space is configured to install the cover body, so as to facilitate the installation of the brush head base, which can make a structure of the head portion more compact. In addition, when the included angle between the rotation axis of the first gear and the rotation axis of the second gear is within the above range, an axis of the handle portion and an axis of the brush head base adaptively form a certain included angle, so that gripping of the handle portion is facilitated a user holds the handle portion during use and fatigue of a hand is reduced during long-term use.

[0044] In some optional embodiments, a tooth number ratio of the second gear to the first gear is within a range of 1.5-3.

[0045] According to the above technical solution, the first gear is arranged between the head portion and the neck portion, the second gear is arranged in the head portion, a size of the neck portion is relatively small, a corresponding size of the first gear is relatively small, so that the structure of the brush handle is relatively compact; and the second gear is relatively large, a corresponding structure of the cover body is relatively large, so that the installation of the brush head base and a brush head assembly is facilitated. In addition, a rotation speed of the second gear is reduced, so as to avoid splashing of cleaning liquid below the brush head assembly during use of the brush head assembly.

[0046] In some optional embodiments, the drive unit includes a motor and a speed reduction assembly; an output shaft of the motor is connected to an input shaft of the speed reduction assembly, and an output shaft of the speed reduction assembly is connected to the transmission shaft; and a transmission ratio of the speed reduction assembly is in a range of 30-40.

[0047] According to the above technical solution, after the deceleration by the speed reduction assembly, the motor can enable the output torque of the brush head base to be relatively appropriate, such that the splashing of cleaning liquid is reduced, the cleaning time is shortened, and the cleanliness is improved.

[0048] In some optional embodiments, one side of the head portion away from the opening end is of a conical structure, an outer peripheral surface of the second gear away from the opening end is a conical surface, and a distance D3 between an inner conical surface of the conical structure of the head portion and the conical surface of the second gear is 0.5-2 mm.

[0049] According to the above technical solution, a portion of the head portion away from the opening end is of a conical structure, such that the conical structure provides a guiding function during insertion of the electric brush handle into a narrow gap. The distance between the inner conical surface of the conical structure and the conical surface of the second gear is within the above range, so that the structure of the head portion of the electric brush handle can be more compact, a possibility of friction between the second gear and the inner conical surface of the conical structure is relatively small, and the electric brush has weak vibration and low noise during use.

[0050] In combination with the first aspect, in some optional embodiments, the head portion further includes a cylindrical structure, the cylindrical structure is connected to one side of the conical structure close to the opening end, the cover body is arranged within the cylindrical structure and is connected to an inner side of the cylindrical structure, and the second gear is arranged within the conical structure.

[0051] According to the above technical solution, the cover body is substantially not exposed, such that an appearance of a brush head is more aesthetic. In addition, the cylindrical structure is easily adapted to a side plate of the cover body, the installation between the cylindrical structure and the cover body is facilitated, and the structure is more compact.

[0052] In combination with the first aspect, in some optional embodiments, the head portion is provided with a drainage hole, and the drainage hole is located at one side of the cover body away from the first gear.

[0053] According to the above technical solution, the drainage hole is arranged at the side of the cover body away from the first gear, so that the liquid entering the head portion of the electric brush handle is easily discharged when a user holds the handle portion. In addition, water accumulates adjacent to the drainage hole during drainage, and since the drainage hole is away from the first gear, the lubrication of the first gear is not substantially affected by accumulated water. Further, in a case where a tail portion of the handle portion is hung up, water is automatically discharged from the drainage hole, so that drainage is more convenient.

[0054] In combination with the first aspect, in some optional embodiments, the second gear is connected with a gear shaft, and one end of the gear shaft extends into the closed end of the cover body and is connected to the brush head base.

[0055] According to the above technical solution, the gear shaft of the second gear is directly extended into the cover body and connected to the gear shaft, so that the brush head base is directly driven to rotate when the second gear rotates. Further, the rotation of the brush head base can be more stable, and the electric brush has weak vibration and low noise during use.

[0056] In combination with the first aspect, in some optional embodiments, the gear shaft is further provided with a limiting member, and the limiting member is located at one side of the second gear away from the cover body, so as to limit relative movement between the gear shaft and the second gear in an axial direction; and the limiting member is a snap ring or a pin.

[0057] According to the above technical solution, by limiting the movement of the second gear relative to the gear shaft through the limiting member, the friction between the second gear and the housing caused by the movement of the second gear relative to the gear shaft is avoided, and the electric brush has weak vibration and low noise during use.

[0058] In combination with the first aspect, in some optional embodiments, the brush head base is configured to detachably connect the brush head assembly; the brush head base includes a bell-shaped structure, an interior of the bell-shaped structure is provided with a second accommodation cavity, and a lower end of the bell-shaped structure is provided with an opening communicating with the second accommodation cavity; and the opening is configured to insert the brush head assembly into the second accommodation cavity.

[0059] According to the above technical solution, the second accommodation cavity of the bell-shaped structure is provided with an opening, and the brush head assembly is inserted into the second accommodation cavity through the opening, such that the installation and removal of the brush head assembly are convenient. In addition, an installation depth of the brush head assembly is relatively appropriate, such that a size of the head portion is smaller, the circumferential matching between the brush head assembly and the brush head base during rotation is better, the rotation of the brush head is more stable, and the electric brush has weak vibration and low noise during use.

[0060] In combination with the first aspect, in some optional embodiments, a manner of detachably connecting the brush head assembly is a magnetic connection, a first connecting member configured to connect with the brush head assembly is arranged in the second accommodation cavity, and the first connecting member is a magnet or a ferromagnetic structural member.

[0061] According to the above technical solution, the brush head assembly is connected to the bell-shaped structure of the brush head base by magnetic attraction, such that the installation and removal of the brush head assembly are convenient, so as to replace a corresponding brush head assembly according to different cleaning requirements.

[0062] In combination with the first aspect, in some optional embodiments, a lower portion of an outer side wall of the bell-shaped structure is provided with a flange, and a gap is formed between an upper portion of the outer side wall of the bell-shaped structure and an inner side wall of the cover body.

[0063] According to the above technical solution, the flange is arranged on the outer side wall of the bell-shaped structure, so that the rotation of the brush head assembly connected to the brush head base is more stable when the brush head base rotates; and a region of the brush head base other than the flange substantially does not contact the cover body, such that the friction between the brush head base and the cover body is small, and the influence on rotation of the brush head base is small. The gap between the upper portion of the outer side wall of the bell-shaped structure and the inner side wall of the cover body avoids contact and friction between the upper portion of the bell-shaped structure and the cover body, and this gap is configured to accommodate lubricating grease, so as to further reduce the friction between the bell-shaped structure and the cover body. Therefore, during use of the electric brush, the rotation of the brush head assembly is more stable, the vibration is weak, and the noise is low.

[0064] In combination with the first aspect, in some optional embodiments, a lower end of the bell-shaped structure has an annular plane, so that the annular plane forms annular surface contact with the brush head assembly when the brush head assembly is connected to the brush head base.

[0065] According to the above technical solution, since the lower end of the bell-shaped structure has the annular plane configured to form the annular surface contact with the brush head assembly, the brush head base is in contact with a mounting portion in a circumferential direction of a rotation direction of the brush head base, so that the force on the brush head assembly after the installation is more uniform. When the brush head assembly tends to deflect in any direction due to force, the brush head base provides better abutting support to the mounting portion of the brush head assembly, so that deflection relative to the bell-shaped structure is less likely to occur.

[0066] In combination with the first aspect, in some optional embodiments, the lower end of the bell-shaped structure extends out of the first accommodation cavity from the opening end of the cover body in a direction away from the second gear.

[0067] According to the above technical solution, in a case where an axial dimension of the head portion is relatively small, an axial space of the second accommodation cavity of the brush head base is increased. After the brush head assembly is installed in the brush head base of the bell-shaped structure, the brush head base provides better circumferential enclosure to the brush head assembly. In this way, during rotation of the brush head assembly, the circumferential matching between the brush head assembly and the brush head base is better, the rotation of a brush head is more stable, and the electric brush has weak vibration and low noise during use.

[0068] According to a second aspect, an embodiment of the present disclosure provides an electric brush, which includes the electric brush handle provided according to the first aspect, where the brush head assembly includes a mounting portion and a connecting portion and a cleaning portion located on two sides of the mounting portion, and the connecting portion is connected to the brush head base.

[0069] According to the above technical solution, the brush head assembly has the cleaning portion, and the cleaning portion is configured to clean a contaminant. Since the brush head base is driven to rotate by means of gear transmission, and then, the brush head assembly is driven to rotate by the brush head base, the vibration generated during use is reduced, the holding comfort for a user is improved, the splashing of cleaning liquid is avoided, and the noise generated by gear-driven rotation is low.

[0070] In combination with the second aspect, in some optional embodiments, the brush head base includes the bell-shaped structure, an interior of the bell-shaped structure has the second accommodation cavity, and a lower portion of the bell-shaped structure has an opening communicating with the second accommodation cavity; a first connecting member is arranged in the second accommodation cavity; and the connecting portion is provided with a second connecting member, and the connecting portion extends into the second accommodation cavity from the opening, so that the first connecting member is connected to the second connecting member.

[0071] According to the above technical solution, the connecting portion extends into the second accommodation cavity from the opening, so that the first connecting member is connected to the second connecting member, thereby achieving the connection between the brush head base and the brush head assembly. In this connection manner, the brush head assembly is directly inserted into the second accommodation cavity to achieve connection, and the operation is convenient. After the connecting portion extends into the second accommodation cavity, the brush head base provides a certain enclosure effect to the connecting portion, so that deflection of the brush head assembly after being subjected to force is further limited.

[0072] In combination with the second aspect, in some optional embodiments, one of the first connecting member and the second connecting member is a magnet, and the other one of the first connecting member and the second connecting member is a ferromagnetic structural member; or both the first connecting member and the second connecting member are magnets.

[0073] According to the above technical solution, the brush head base and the brush head assembly are connected in a magnetic attraction manner through the first connecting member and the second connecting member, so that the installation and removal of the brush head assembly are facilitated, and a corresponding brush head assembly is replaced according to the cleaning of different areas.

[0074] In combination with the second aspect, in some optional embodiments, one of the first connecting member and the second connecting member is an annular structural member, and the other one of the first connecting member and the second connecting member is a block-shaped structural member; or both the first connecting member and the second connecting member are block-shaped structural members. When the connecting portion is connected to the brush head base, one side surface of the first connecting member is arranged opposite to one side surface of the second connecting member.

[0075] According to the above technical solution, the connection in the magnetic attraction manner is achieved when the first connecting member and the second connecting member are the block-shaped structural members or the annular structural members. When the brush head assembly is connected to the brush head base, the surfaces of the first connecting member and the second connecting member are arranged opposite to each other, so that the magnetic force generated between the first connecting member and the second connecting member is greater, and the connection between the brush head assembly and the brush head base is more reliable.

[0076] In combination with the second aspect, in some optional embodiments, the lower portion of the bell-shaped structure is in contact with the mounting portion, and a gap is arranged between the first connecting member and the second connecting member in the rotation axis direction of the brush head base.

[0077] According to the above technical solution, when the lower portion of the bell-shaped structure is in contact with the mounting portion, the movement of the brush head assembly in the rotation axis direction of the brush head base is limited, so that the first connecting member and the second connecting member maintain a gap in this direction. That is, during insertion of the brush head assembly into the second accommodation cavity, the contact between the bell-shaped structure and the mounting portion can serve as a limit, which prevents the contact and collision between the first connecting member and the second connecting member under magnetic attraction, thereby effectively avoiding damage to the magnet.

[0078] In combination with the second aspect, in some optional embodiments, a direction in which the connecting portion is inserted into the second accommodation cavity is defined as an insertion direction, and the sectional contours of the connecting portion and the second accommodation cavity perpendicular to the insertion direction are polygonal, so that the brush head base drives the brush head assembly to rotate.

[0079] According to the above technical solution, since the sectional contours of the connecting portion and the second accommodation cavity perpendicular to the insertion direction are polygonal, the rotation of the brush head base and the brush head assembly is more consistent during synchronous rotation of the brush head base and the brush head assembly, the brush head assembly rotates more smoothly, the vibration during use of the electric brush is avoided, and the cleaning liquid is less likely to splash during cleaning.

[0080] In combination with the second aspect, in some optional embodiments, one side of the mounting portion opposite to the connecting portion is a curved surface protruding in a direction away from the connecting portion; and the cleaning portion includes bristles, and the bristles extend in a direction perpendicular to the curved surface.

[0081] According to the above technical solution, since the bristles extend in a direction perpendicular to the curved surface, the bristles have good durability and are not easily deformed, and an end of the bristles away from the mounting portion extends outward, so that the cleaning of corners is facilitated.

[0082] As shown in FIGS. 1, 2, and 13, the electric brush provided in an embodiment of the present disclosure includes an electric brush handle 100 and a brush head assembly 200 having a cleaning portion 210, where the cleaning portion 210 is configured to perform cleaning by directly contacting a contaminant.

[0083] As shown in FIGS. 1 to 4, the electric brush handle 100 includes a housing, and the housing is a visually observable exterior structure configured for a user to hold. The housing includes a head portion 111 and a cover body 130 connected to the head portion 111. As shown in FIGS. 11 and 12, the cover body 130 has an opening end 133 and a closed end 132 opposite to each other, and the closed end 132 of the cover body 130 is recessed toward the interior of the head portion 111. As shown in FIG. 4, the cover body 130 is rotatably connected with the brush head base 140, and the brush head base 140 is configured to connect the brush head assembly 200 from a side close to the opening end 133, so that the brush head base 140 can rotate together with the brush head assembly 200. Referring to FIGS. 7 and 12, the brush head base 140 is located in the first accommodation cavity 131 of the cover body 130, where the first accommodation cavity 131 of the cover body 130 is formed by the recessed portion of the closed end 132 of the cover body 130 toward the interior of the head portion 111. The opening end 133 of the cover body 130 is configured to mount the brush head base 140 into the first accommodation cavity 131. The closed end 132 of the cover body 130 does not mean that the closed end 132 is completely closed without any through holes, but indicates that the closed end 132 is not configured to allow the brush head base 140 to pass through. Since the closed end 132 of the cover body 130 is recessed toward the interior of the head portion 111, after the brush head base 140 is arranged in the first accommodation cavity 131, a size of the head portion of the electric brush handle 100 is relatively small, and correspondingly, a size of the head portion of the electric brush is also relatively small.

[0084] Referring to FIGS. 6, 7, 9 and 10, the head portion 111 is further provided with a transmission unit 150, and the transmission unit 150 includes a first gear 151 and a second gear 152 engaged with the first gear 151. Referring to FIGS. 7 and 12, the first gear 151 is arranged toward a side surface of the cover body 130, and the second gear 152 is arranged toward the closed end 132 of the cover body 130. The side surface of the cover body 130 is located between the opening end 133 and the closed end 132. Further, the side surface of the cover body 130 is located on an outer side of the cover body 130. The transmission unit 150 in the housing body 120 is in transmission connection with the brush head base 140. Specifically, the second gear 152 is connected to the brush head base 140 to rotate synchronously with the second gear 152. Since the brush head base 140 is driven to rotate through gear transmission, the electric brush exhibits weak vibration and low noise during use.

[0085] The electric brush provided in the present disclosure adopts gear transmission to drive the rotation of the brush head base 140 and the brush head assembly 200, thereby reducing noise during use. Furthermore, according to the arrangement shown in FIG. 7, where the first gear 151 is arranged toward the side surface of the cover body 130 and the second gear 152 is arranged toward the closed end 132 of the cover body 130, the internal structure of the head portion of the electric brush handle 100 is more compact, and the size of the head portion of the electric brush is relatively small.

[0086] In the present disclosure, during operation of the electric brush, the first gear 151 and the second gear 152 rotate relative to the cover body 130. To reduce the possibility of friction between the first gear 151 and the cover body 130 and between the second gear 152 and the cover body 130, in some embodiments, the first gear 151 has a first surface facing the cover body 130, and a distance D1 between the first surface and the cover body 130 is 3-5 mm, specifically 3 mm, 3.6 mm, 4 mm, or 5 mm, where the distance refers to the minimum clearance between the first gear 151 and the cover body 130. The second gear 152 has a second surface facing the cover body 130, and a distance D2 between the second surface and the cover body 130 is 1-3 mm, specifically 1 mm, 1.2 mm, 2 mm, or 3 mm, where the distance refers to the minimum clearance between the second gear 152 and the cover body 130. In the present disclosure, within the distance ranges provided in this embodiment, the possibility of friction between the first gear 151 and the cover body 130 and between the second gear 152 and the cover body 130 is lower, and the structure of the head portion of the electric brush handle 100 is more compact and smaller in size. In other embodiments, the distance between the first surface of the first gear 151 and the cover body 130, and the distance between the second surface of the second gear 152 and the cover body 130 can also fall outside the above ranges.

[0087] In the embodiment shown in FIG. 12, the cover body 130 includes a top plate 134, a transition section 135 with an increased diameter, and a side plate 136 forming a ring in the direction from the closed end 132 to the opening end 133. The top plate 134 is located at the closed end 132. The side surface of the cover body 130 is located on the side plate 136 or on the transition section 135. The opening end 133 is located at an end of the side plate 136 away from the top plate 134. The side plate 136 is connected to the head portion 111, and the connection can specifically be integrally formed. Since the closed end 132 of the cover body 130 is recessed toward the interior of the head portion 111, the top plate 134 is located inside the head portion 111. The top plate 134 is further provided with a through hole to allow the gear shaft 1521 of the second gear 152 to pass through the cover body 130 and connect to the brush head base 140. It should be readily understood that in this embodiment, the top plate 134, the transition section 135, and the side plate 136 together form the first accommodation cavity 131. The lower end of the side plate 136 is the opening end 133 communicating with the first accommodation cavity 131, and the cover body 130 as a whole is of a bell-shaped structure with a uniform wall thickness. In other embodiments, the cover body 130 can adopt other structures. For example, the cover body only includes the side plate and the top plate without the transition section; or the cover body only includes the side plate and the transition section, with the transition section provided with a through hole for the gear shaft of the second gear to pass through. The side plate 136 can also not form a closed ring. As shown in FIG. 4, the left side of the transition section 135 of the cover body 130 is connected to the head portion 111, and the right side of the side plate of the cover body 130 is connected to the head portion 111, forming a structure of the cover body 130 similar to having a notch.

[0088] Further, as shown in FIGS. 7 and 12, the first surface of the first gear 151 and the second surface of the second gear 152 are both recessed in a direction away from the cover body 130. The top plate 134 is located within the recessed area of the second surface, and in the rotation axis direction of the first gear 151, the transition section 135 protrudes toward the first surface. Here, the top plate 134 being located within the recessed area of the second surface means that in the rotation axis direction of the second gear 152, at least a portion of the top plate 134 is located within the space formed by the recessed area of the second surface, so that the size of the head portion of the electric brush in this direction is relatively small. Similarly, in the rotation axis direction of the first gear 151, the protrusion of the transition section 135 toward the first surface can also reduce the size of the head portion of the electric brush in the rotation axis direction of the first gear 151. That is, the structural shapes of the first gear 151 and the second gear 152 are matched to the shape of the cover body 130, allowing the first gear 151 and the second gear 152 to be provided in a limited space, making the internal structure of the electric brush handle 100 more compact and improving space utilization, so that the head portion of the electric brush handle 100 has a smaller size.

[0089] Referring to FIGS. 1 and 2, in an embodiment of the present disclosure, the housing includes a handle portion 113, a neck portion 112, and a head portion 111 sequentially arranged. The handle portion 113 is configured for being gripped by a user, and a non-slip portion 1131 can be arranged on an outer side of the handle portion 113. The head portion 111 is the portion connecting to the brush head base 140. The neck portion 112 is located between the handle portion 113 and the head portion 111, serving to connect the handle portion 113 and the head portion 111. The handle portion of the electric brush is the handle portion of the electric brush handle 100, and the handle portion of the electric brush handle 100 includes the handle portion 113 of the housing. The neck portion of the electric brush is the neck portion of the electric brush handle 100, and the neck portion of the electric brush handle 100 includes the neck portion 112 of the housing. The head portion of the electric brush includes the head portion of the electric brush handle 100 and further includes the brush head assembly 200 connected to the brush head base 140. The head portion of the electric brush handle 100 includes the head portion 111 of the housing, and the head portion 111 of the housing includes the head portion of the housing body 120.

[0090] A drive unit 160 is arranged in the handle portion 113, and a transmission shaft 153 is arranged in the neck portion 112. A second gear 152 is arranged in the head portion 111 and located at a side where the closed end 132 of the cover body 130 is located, and the cover body 130 is located at the head portion 111 of the housing. The drive unit 160 is connected to the transmission shaft 153, the power output by the drive unit 160 drives the brush head base 140 to rotate after passing through the transmission shaft 153, the first gear 151, and the second gear 152, thereby driving a brush head assembly 200 to move.

[0091] In some embodiments of the present disclosure, the first gear 151 and the second gear 152 are both bevel gears, an included angle between a rotation axis of the first gear 151 and a rotation axis of the second gear 152 is α, and α is 10°-80°. Referring to FIG. 8, that is, an included angle formed between a rotation axis of the first gear 151 extending from a first surface toward the cover body 130 and a rotation axis of the second gear 152 extending from a second surface toward the cover body 130 is 10°-80°. When the included angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is smaller, namely closer to 10°, an opening angle of the first surface of the first gear 151 relative to the second surface of the second gear 152 is larger; and when the included angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is larger, namely closer to 80°, the opening angle of the first surface of the first gear 151 relative to the second surface of the second gear 152 is smaller. In this embodiment, the first gear 151 and the second gear 152 are bevel gears, and an included angle between axes of the first gear 151 and the second gear 152 is within the above range. The first gear 151 is arranged toward a side surface of the cover body 130, and the second gear 152 is arranged toward the closed end 132 of the cover body 130, so that a suitable space is formed between the first gear 151 and the second gear 152. The space is configured to mount the cover body 130, so that the installation of the brush head base 140 is facilitated, and a structure of the head portion 111 is more compact. In addition, when the included angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is within the above range, an axis of the handle portion 113 and an axis of the brush head base 140 adaptively form a certain included angle, so that gripping of the handle portion 113 is facilitated when a user holds the handle portion 113 during use, and fatigue of a hand is reduced during long-term use.

[0092] In the embodiments provided by the present disclosure, the first gear 151 and the second gear 152 can be a spur gear and a helical gear. In an embodiment in which the first gear 151 and the second gear 152 are both helical gears, the transmission between the first gear 151 and the second gear 152 is more stable, resulting in lower noise during operation, and under a same axial distance, a tooth length is larger, so that the meshing strength between the first gear 151 and the second gear 152 is increased to enable more secure engagement between the first gear 151 and the second gear 152 and avoid slipping after long-time use.

[0093] In some embodiments, a number of teeth of the first gear 151 is less than a number of teeth of the second gear 152, and correspondingly, a radial dimension of the first gear 151 is less than a radial dimension of the second gear 152. Referring to FIGS. 1 and 7, a gear shaft 1521 of the second gear 152 is connected to the brush head base 140 and drives the brush head base 140 to rotate, and therefore, a dimension of a head portion of an electric brush handle 100 in a direction of a rotation axis of the brush head base 140 (namely a direction of the rotation axis of the second gear 152) is affected not only by a radial dimension of the second gear 152, but also by a radial dimension of the first gear 151. Therefore, since the number of teeth of the first gear 151 is less than the number of teeth of the second gear 152, the head portion of the electric brush handle 100 has a smaller dimension in the direction of the rotation axis of the brush head base 140, thereby enabling application in a narrower gap. In addition, in this embodiment, since the number of teeth of the first gear 151 is less than the number of teeth of the second gear 152, a speed reduction effect is achieved, the torque output by the gear shaft 1521 of the second gear 152 is increased, and more stubborn contaminant is cleaned.

[0094] In some embodiments, a ratio of the number of teeth of the second gear 152 to the number of teeth of the first gear 151 is 1.5-3, specifically 13:7. Under an arrangement manner shown in FIGS. 6 and 7, the first gear 151 is arranged between the head portion 111 and the neck portion 112, the second gear 152 is arranged in the head portion 111, a size of the neck portion 112 is relatively small, and a corresponding size of the first gear 151 is relatively small, so that the structure of the electric brush handle is relatively compact. The second gear 152 is relatively large, and a corresponding structure of the cover body 130 is relatively large, so that the installation of the brush head base 140 and a brush head assembly 200 is facilitated. In addition, a rotation speed of the second gear 152 is reduced, so as to avoid splashing of cleaning liquid below the brush head assembly 200 during use of the brush head assembly 200.

[0095] In some other embodiments, the number of teeth of the first gear 151 can also be less than or equal to the number of teeth of the second gear 152, namely, the ratio of the number of teeth of the second gear 152 to the number of teeth of the first gear 151 can be within other ranges.

[0096] In some embodiments, the drive unit 160 includes a motor and a speed reduction assembly; an output shaft of the motor is connected to an input shaft of the speed reduction assembly, and an output shaft of the speed reduction assembly is connected to the transmission shaft 153; and a transmission ratio of the speed reduction assembly is in a range of 30-40, specifically, 32:1, 35:1, 38:1, or 40:1. In this embodiment, a motor is decelerated by a speed reduction assembly, so that the rotation speeds of the brush head base 140 and the brush head assembly 200 are controlled within a reasonable range, the noise generated is lower, and the load borne by the electric brush during operation is increased, thereby enabling cleaning of relatively stubborn contaminant. Further, the speed reduction assembly can be a gear reduction box, and can also be other existing devices capable of achieving speed reduction. Further, a power source 180 can be arranged in the handle portion 113 to supply power to the drive unit 160. In some other embodiments, the electric brush can also adopt other driving manners and corresponding structures.

[0097] Reference is made to FIGS. 6 and 7, in some embodiments of the present disclosure, a portion of the head portion 111 of the housing away from the opening end 133 of the cover body 130 is a conical structure 1111. An outer peripheral surface 1523 of the second gear 152 away from the opening end 133 is a conical surface, where an outer peripheral surface of the second gear 152 forms a boundary of the second gear 152 in a radial direction. In the embodiments shown in FIGS. 9 and 10, the second gear 152 has two outer peripheral surfaces, a first outer peripheral surface is located at one side of the second gear 152 toward the opening end 133 and surrounds a second surface of the second gear 152 at an inner side, and a second outer peripheral surface 1523 is located at one side of the second gear 152 away from the opening end 133 and connected to the first outer peripheral surface. As shown in FIGS. 7, 9 and 10, an inner conical surface of the conical structure 1111 of the housing is arranged opposite to the conical surface of the second gear 152. Further, a distance D3 between the inner conical surface of the conical structure 1111 of the head portion 111 of the housing and the conical surface of the second gear 152 is 0.5-2 mm, specifically 0.5 mm, 1 mm, 1.5 mm, or 2 mm, where the distance refers to a minimum gap between the conical surface of the second gear 152 and the inner conical surface of the conical structure 1111 of the housing. In this embodiment, a portion of the head portion 111 of the housing away from the opening end 133 is the conical structure, namely, during use of the electric brush, one side of the head portion 111 away from the ground is the conical structure 1111. During insertion of the electric brush into a narrow gap, the conical structure 1111 provides a guiding function. The distance between the inner conical surface of the conical structure 1111 and the conical surface of the second gear 152 is controlled within the above range, so that a structural layout inside the head portion of the electric brush is more compact, a dimension of the head portion of the electric brush is smaller, a possibility of friction between the second gear 152 and the inner conical surface of the conical structure 1111 is smaller, the vibration during use of the electric brush is weaker, and noise is lower.

[0098] Further, referring to FIGS. 1, 2, 4, and 7, the head portion 111 further includes a cylindrical structure 1112, and the cylindrical structure 1112 is connected to one side of the conical structure 1111 close to the opening end 133. The cover body 130 is arranged in the cylindrical structure 1112 and connected to an inner side of the cylindrical structure 1112. In the embodiment shown in FIG. 1, the cylindrical structure 1112 has a cylindrical surface, and an axis of the cylindrical surface coincides with an axis of the cover body 130 and a rotation axis of the brush head base 140. In other embodiments, the cylindrical structure 1112 can also have a prismatic surface. In the embodiments shown in FIGS. 3, 11, and 12, the opening end 133 of the cover body 130 is indirectly connected to the cylindrical structure 1112 through an annular plate-shaped structure 1113. Further, as shown in FIG. 12, the opening end 133 of the cover body 130 can protrude beyond the annular plate-shaped structure 1113. The opening end 133 of the cover body 130 can also be flush with the annular plate-shaped structure 1113. In a flush condition, the cover body 130 is substantially not exposed, so that an appearance of a brush head is more aesthetically pleasing. In addition, the cylindrical structure 1112 is easily adapted to a side plate 136 of the cover body 130, the installation between the cylindrical structure 1112 and the cover body 130 is facilitated, and a structure is more compact. Referring to FIGS. 8 to 12, the conical structure 1111, the cylindrical structure 1112, the annular plate-shaped structure 1113, and the cover body 130 form a certain space, and the second gear 152 is arranged in the space, specifically, the second gear 152 is arranged in the conical structure 1111.

[0099] In some embodiments, as shown in FIGS. 7 and FIGS. 9 to 11, the housing includes a housing body 120 and a cover 171, a head portion of the housing body 120 and a head portion of the cover 171 jointly form a head portion 111 of the housing of the electric brush handle, a neck portion of the housing body 120 and a neck portion of the cover 171 jointly form a neck portion 112 of the housing of the electric brush handle, and a handle portion of the housing body 120 and a handle portion of the cover 171 jointly form a handle portion 113 of the housing of the electric brush handle. The cover body 130 is arranged in the housing body 120 of the head portion 111 and is connected to the housing body 120 of the head portion 111. Optionally, the closed end of the cover body 130 is recessed toward the housing body 120 of the head portion 111, and the cover body 130 is integrally formed with the housing body 120.

[0100] Further, the housing body 120 has a first opening 121 at a side away from the brush head base 140, the first opening 121 is configured to mount the transmission shaft 153 into the neck portion 112 of the housing and to mount the second gear 152 into the head portion 111 of the housing, and the cover 171 is configured to cover the first opening 121. As shown in FIGS. 7 and 12, a conical structure of the head portion 111 of the housing is arranged at a head portion of the cover 171, and a cylindrical structure 1112 of the head portion 111 of the housing is arranged at a head portion of the housing body 120. The housing body 120 further has a second opening 122 at an end away from the head portion 111, namely an end portion of the handle portion 113. The housing body 120 has an installation cavity configured to accommodate the drive unit 160, the second opening 122 communicates with the installation cavity to enable the drive unit 160 to be mounted, and an end cover 174 is further covered on the second opening 122. Optionally, a battery, a circuit board, and the like can further be mounted in the installation cavity to supply electrical energy to a motor and to control rotation of the motor through the circuit board.

[0101] In some embodiments of the present disclosure, the connection between the cover 171 and the housing body 120 fixes the transmission shaft 153 and the second gear 152, where the fixation of the transmission shaft 153 and the second gear 152 means that the second gear 152 and the transmission shaft 153 rotate normally at preset installation positions to drive the brush head base 140 to rotate, rather than that the second gear 152 and the transmission shaft 153 are fixed relative to the housing body 120. Optionally, a transmission shaft sleeve is further arranged in the neck portion of the housing body 120, the transmission shaft 153 is arranged in the transmission shaft sleeve, an inner wall of the housing body 120 is provided with a plurality of snapping grooves arranged sequentially along an axial direction of the transmission shaft 153, and the transmission shaft sleeve is snapped into the snapping grooves to fix the transmission shaft 153, so that the transmission shaft 153 maintains coaxial synchronous rotation with the first gear 151.

[0102] In other embodiments, as shown in FIGS. 7 and 9, a pressing plate 172 can further be arranged between the housing body 120 and the cover 171, and the transmission shaft 153 and the second gear 152 are fixed to the housing body 120 through the pressing plate 172. The pressing plate 172 can be connected to the housing body 120 through threaded fasteners, or the pressing plate 172 can be connected to the cover 171 through threaded fasteners, or other connection manners can be adopted. In this embodiment, the cover 171 only covers the first opening 121 and does not fix the transmission shaft 153 and the second gear 152, and therefore, the cover 171 can be bonded with the housing body 120 or snap-connected with the housing body 120. In addition, an aesthetically designed cover 171 can be used, so that the appearance of the electric brush handle 100 is improved.

[0103] In some embodiments, to facilitate discharge of liquid entering the housing during a cleaning process, the housing body 120 is further provided with a drainage hole 123. The drainage hole 123 can be arranged at the head portion of the electric brush, specifically at the head portion of the electric brush handle 100, at the head portion of the housing body 120, at the neck portion 112 of the electric brush handle 100, or at the neck portion of the housing body 120. In the embodiment shown in FIG. 3, the drainage hole 123 is arranged at the head portion of the electric brush handle 100 and is located at one side of the cover body 130 away from the first gear 151, so that liquid in the head portion is thrown out from the drainage hole 123 by swinging. The drainage hole 123 can be arranged on an annular plate-shaped structure 1113 connecting the cover body 130 and the cylindrical structure 1112, can be arranged on the cylindrical structure 1112 or the conical structure 1111, or at other positions. According to the arrangement of the drainage hole 123 shown in FIG. 3, the drainage hole 123 is away from the first gear 151, water accumulates near the drainage hole 123 during drainage, and lubrication of the first gear 151 is not substantially affected by accumulated water at the drainage hole 123. When the handle portion 113 is hung up at a tail portion, water is discharged automatically from the drainage hole 123, drainage is more convenient, and the drainage hole 123 is not easily observed after installation of the brush head assembly 200, so that appearance of the product is more concise. In other embodiments, the drainage hole 123 can not be provided.

[0104] In an embodiment in which the second gear 152 is in transmission connection with the brush head base 140, the gear shaft 1521 of the second gear 152 is fixedly connected with the brush head base 140 to drive synchronous rotation of the brush head base 140 during rotation of the second gear 152. As shown in FIGS. 7 and 12, the gear shaft 1521 of the second gear 152 extends from the closed end 132 of the cover body 130 into the first accommodation cavity and is connected to the brush head base 140. It should be readily understood that the closed end 132 of the cover body 130 is not completely closed, and a through hole is provided for the gear shaft 1521 to pass through.

[0105] Further, referring to the embodiment shown in FIG. 7, a first shaft sleeve 137 is further arranged at a position of the through hole of the closed end 132, and the gear shaft 1521 of the second gear 152 extends into the first accommodation cavity 131 of the cover body 130 through an inner side of the first shaft sleeve 137. The first shaft sleeve 137 includes an axial section and a radial section connected to each other. The axial section is an annular structure and is configured to be sleeved on an outer side of the gear shaft 1521 to reduce friction. The radial section is an annular plate-shaped structural member and is configured to be hung on the closed end 132 of the cover body 130.

[0106] In some embodiments, the gear shaft 1521 of the second gear 152 can be fixedly connected to the brush head base 140. In other embodiments, the second gear 152 can be fixedly connected to the gear shaft 1521. For example, in some embodiments, the second gear 152 is integrally injection-molded with the gear shaft 1521, and thereafter the second gear 152 is mounted on the gear shaft 1521. In some other embodiments, the second gear 152 and the gear shaft 1521 are formed as an integral structure, and thereafter the brush head base 140 is connected. Those skilled in the art select a connection manner among the brush head base 140, the second gear 152, and the gear shaft 1521 according to assembly difficulty.

[0107] In some embodiments, the gear shaft 1521 is further provided with a limiting member 1522, and the limiting member 1522 is located at one side of the second gear 152 away from the cover body 130 to limit relative movement between the gear shaft 1521 and the second gear 152 in an axial direction. The axial movement of the second gear 152 on the gear shaft 1521 is limited by disposing the limiting member 1522, so that the first gear 151 and the second gear 152 are maintained at a proper meshing position, thereby making transmission between the first gear 151 and the second gear 152 more stable and reducing noise. The limiting member 1522 is a snap ring or a pin.

[0108] In the embodiments shown in FIGS. 7 and 10, the pressing plate 172 is provided with a second shaft sleeve 173, and after the pressing plate 172 fixes the second gear 152 to the housing body 120, an end of the gear shaft 1521 of the second gear 152 away from the brush head base 140 is located within the second shaft sleeve 173.

[0109] In some embodiments, as shown in FIGS. 4 and 7, the brush head base 140 includes a bell-shaped structure 142, an interior of the bell-shaped structure 142 has a second accommodation cavity 141, a lower end has an opening communicating with the second accommodation cavity 141, and the opening is configured to mount the brush head assembly 200 into the second accommodation cavity 141. The brush head assembly 200 is not entirely mounted into the second accommodation cavity 141 as a whole, and a portion of the brush head assembly 200 is located within the second accommodation cavity 141 to be connected to the brush head base 140. The cleaning portion 210 is located outside the second accommodation cavity 141 to facilitate cleaning of contaminant. A lower portion of the bell-shaped structure 142 refers to a portion close to the cleaning portion 210, and a lower end refers to an end close to the cleaning portion 210. In this embodiment, the brush head assembly 200 is mounted through the opening at the lower end of the second accommodation cavity 141, so that the installation and removal of the brush head assembly 200 are relatively convenient. Further, an installation depth of the brush head assembly 200 is reasonable, so that the head portion 111 has a smaller size, and the circumferential matching between the brush head assembly 200 and the brush head base 140 during rotation is improved, the rotation of the brush head is more stable, the vibration is weak, and the noise is low during use of the electric brush.

[0110] Further, in other embodiments, the brush head base 140 can be a plate-shaped structure, the plate-shaped structure is connected to the gear shaft 1521 of the second gear 152, and the plate-shaped structure is further connected to the brush head assembly 200. The brush head base can also be the gear shaft 1521 of the second gear 152, a connecting portion 230 in the brush head assembly 200 has a groove configured for insertion of the gear shaft 1521, and the connecting portion 230 extends into the cover body 130 and is connected with the gear shaft 1521 by insertion.

[0111] Further, the brush head base 140 and the brush head assembly 200 are in detachable connection to facilitate replacement of the brush head assembly 200 for different application scenarios. In other embodiments, the brush head base 140 and the brush head assembly 200 are in fixed connection, that is, the cleaning portion 210 of each electric brush is not replaceable. In other embodiments, the brush head base 140 can also have other structural shapes. For example, the brush head base 140 is a solid cylindrical body and does not have the second accommodation cavity 141 for accommodating the brush head assembly 200.

[0112] In some embodiments, as shown in FIGS. 13 to 15, the brush head assembly 200 includes a mounting portion 220, one side of the mounting portion 220 is provided with the cleaning portion 210, and an opposite side is provided with the connecting portion 230. The connecting portion 230 can extend into the second accommodation cavity 141 from the opening at the lower end of the second accommodation cavity 141 to be connected with the brush head base 140. The cleaning portion 210 is a portion directly contacting a contaminant during operation of the electric brush. The cleaning portion 210 can be bristles or a cleaning cloth. The mounting portion 220 is a structure configured to mount the cleaning portion 210, and the mounting portion 220 has a smaller dimension in a thickness direction. A specific shape of the mounting portion 220 can be a planar plate-like structural member or a shell-like structural member having a spherical surface. The connecting portion 230 is a portion configured to be connected with the brush head base 140. Specifically, the connecting portion 230 can be configured to be directly connected with the brush head base 140 or configured to mount a connecting member for connecting the brush head base 140. In the embodiments shown in FIGS. 14 and 15, one side of the mounting portion 220 away from the connecting portion 230 is an arc surface protruding in a direction away from the connecting portion 230. The cleaning portion 210 is bristles, and the bristles extend in a direction perpendicular to the arc surface.

[0113] A direction in which the connecting portion 230 is mounted into the second accommodation cavity 141 from the opening at the lower end of the bell-shaped structure 142 is defined as an insertion direction (that is, a direction indicated by arrow B in FIG. 8). A sectional contour of the connecting portion 230 and a sectional contour of the second accommodation cavity 141 in a direction perpendicular to the insertion direction are both polygonal, so that the brush head base 140 can transmit torque to the connecting portion 230 of the brush head assembly 200, and the brush head base 140 drives the brush head assembly 200 to rotate. Specifically, a section can be quadrilateral or hexagonal. Since the sectional contours of the connecting portion 230 and the second accommodation cavity 141 perpendicular to the insertion direction are polygonal, and the rotation of the brush head base 140 and the brush head assembly 200 is more consistent during synchronous rotation of the brush head base 140 and the brush head assembly 200, the brush head assembly 200 rotates more smoothly, the vibration during use of the electric brush is reduced, and the cleaning liquid is less likely to splash during cleaning.

[0114] Further, the second accommodation cavity 141 of the bell-shaped structure 142 is provided with a first connecting member 143, and the connecting portion 230 is provided with a second connecting member 231. In embodiments in which the brush head assembly 200 and the brush head base 140 are detachably connected, the first connecting member 143 and the second connecting member 231 are magnetically connected. One of the first connecting member 143 and the second connecting member 231 is a magnet, and the other one is a ferromagnetic structural member. For example, the first connecting member 143 is a magnet, and the second connecting member 231 is an iron, cobalt, or nickel structural member. In other embodiments, both the first connecting member 143 and the second connecting member 231 are magnets. In other embodiments, the first connecting member 143 is an iron, cobalt, or nickel structural member, and the second connecting member 231 is a magnet. Further, the first connecting member 143 and the bell-shaped structure 142 are connected by adhesive bonding, interference fit, or injection molding. Similarly, the second connecting member 231 and the connecting portion 230 of the brush head assembly 200 are connected by adhesive bonding, interference fit, or injection molding. In other embodiments in which the brush head assembly 200 and the brush head base 140 are detachably connected, the connecting portion 230 of the brush head assembly 200 and the bell-shaped structure 142 of the brush head base 140 are connected by snapping connection or insertion connection.

[0115] In the present disclosure, the brush head base 140 mainly transmits torque to the brush head assembly 200. During operation of the electric brush, a force applied to the brush head assembly 200 in a direction of the rotation axis of the brush head base 140 is also directed toward the brush head base 140, and the separation of the brush head assembly 200 from the brush head base 140 is avoided. Therefore, even if only one of the brush head assembly 200 and the brush head base 140 is provided with a magnet, the requirements for normal operation of the electric brush are satisfied.

[0116] In embodiments in which the connection between the brush head base 140 and the brush head assembly 200 is achieved by magnetic force between the first connecting member 143 and the second connecting member 231, the first connecting member 143 and the second connecting member 231 can be block-shaped structural members. For example, the first connecting member 143 is a block-shaped magnet, and the second connecting member 231 is an iron block. In other embodiments, both the first connecting member 143 and the second connecting member 231 are annular structural members. In other embodiments, one of the first connecting member 143 and the second connecting member 231 is an annular structural member, and the other one is a block-shaped structural member.

[0117] To make magnetic connection between the brush head base 140 and the brush head assembly 200 more reliable, as shown in FIG. 4, when the connecting portion 230 is connected to the brush head base 140, one side surface of the first connecting member 143 and one side surface of the second connecting member 231 are oppositely arranged, so that magnetic force between the first connecting member 143 and the second connecting member 231 is increased.

[0118] In some embodiments, as shown in FIG. 5, when the connecting portion 230 is connected to the brush head base 140, a lower portion of the bell-shaped structure 142 is in contact with the mounting portion 220, and the first connecting member 143 and the second connecting member 231 have a gap in a direction of the rotation axis of the brush head base 140. In this embodiment, when the lower portion of the bell-shaped structure 142 is in contact with the mounting portion 220, the movement of the brush head assembly 200 in the direction of the rotation axis of the brush head base 140 is limited, and a state in which the first connecting member 143 and the second connecting member 231 have a gap in this direction is maintained. That is, during the insertion of the brush head assembly 200 into the second accommodation cavity 141, the contact between the bell-shaped structure 142 and the mounting portion 220 can serve as a limit, which prevents the collision between the first connecting member 143 and the second connecting member 231 under magnetic attraction, thereby effectively avoiding damage to the magnet.

[0119] Optionally, the connecting portion 230 is a protruding block protruding from the mounting portion 220 in a direction away from the cleaning portion 210. An outer peripheral shape of a section of the protruding block is polygonal, including a quadrilateral or a hexagon. An interior of the protruding block is provided with a groove recessed toward the cleaning portion 210. A magnet is embedded in the groove. A polygonal mounting slot is arranged in the second accommodation cavity 141 of the brush head base 140. A shape of the mounting slot is adapted to a shape of the protruding block. Another magnet is arranged in the mounting slot. When the brush head assembly 200 is installed, the protruding block of the connecting portion 230 is embedded in the mounting slot of the brush head base 140, and two magnets are magnetically connected. A surface of the magnet in the protruding block is located inside the protruding block. When the protruding block is embedded in the mounting slot for magnetic connection, an end portion of the protruding block is in contact with a bottom surface of the mounting slot, and a gap is formed between the two magnets.

[0120] Further, referring to FIGS. 3 and 5, a lower end of the bell-shaped structure 142 is provided with an annular plane 144. When the connecting portion 230 is connected to the brush head base 140, the annular plane 144 of the bell-shaped structure 142 forms annular surface contact with the mounting portion 220. During use of the electric brush, an interaction force in a direction of a rotation axis of the brush head base 140 exists between the brush head assembly 200 and the brush head base 140. When the annular plane 144 of the bell-shaped structure 142 forms annular surface contact with the mounting portion 220, the force applied to the mounting portion 220 is more uniform. When the brush head assembly 200 tends to deflect in any direction due to force, the brush head base 140 provides effective abutting to the mounting portion 220 of the brush head assembly 200, so that the deflection relative to the bell-shaped structure 142 is less likely to occur, thereby reducing deflection of the brush head assembly 200 after being subjected to force. The deflection of the brush head assembly 200 refers to a condition in which a rotation axis of the brush head assembly 200 (such as a rotation axis of the connecting portion 230) is not parallel to the rotation axis of the brush head base 140. In a normal working state, the brush head assembly 200 is driven to rotate by the brush head base 140. Therefore, the rotation axis of the brush head assembly 200 is parallel to the rotation axis of the brush head base 140.

[0121] In other embodiments, the lower end of the bell-shaped structure 142 can be provided with a plurality of planes arranged at intervals along a circumference. When the connecting portion 230 is connected to the brush head base 140, the contact surfaces between the bell-shaped structure 142 and the mounting portion 220 are distributed at intervals along the circumference.

[0122] Further, in some embodiments, the lower end of the bell-shaped structure 142 extends out of the first accommodation cavity 131 from the opening end 133 of the cover body 130 in a direction away from the second gear 152. When the electric brush operates, the cover body 130 does not rotate, and the brush head assembly 200 and the bell-shaped structure 142 of the brush head base 140 rotate. When the lower end of the bell-shaped structure 142 extends out of the first accommodation cavity 131 from the opening end 133 of the cover body 130, the contact between the brush head assembly 200 and the bell-shaped structure 142 of the brush head base 140 enables a gap between the brush head assembly 200 and the cover body 130 of the housing body 120, thereby reducing friction during rotation of the brush head assembly 200, so that rotation of the brush head assembly 200 is more stable, the vibration is weaker, and the noise is lower during use of the electric brush. In addition, in a case where an axial dimension of the head portion 111 is relatively small, an axial space of the second accommodation cavity 141 of the brush head base 140 is increased. After the brush head assembly 200 is installed in the brush head base 140 of the bell-shaped structure 142, the brush head base 140 provides better circumferential enclosure to the brush head assembly 200. In this way, during rotation of the brush head assembly 200, the circumferential matching between the brush head assembly 200 and the brush head base 140 is better, the rotation of a brush head is more stable, and the electric brush has weak vibration and low noise during use.

[0123] Further, referring to FIG. 5, a flange 145 is arranged on a lower portion of an outer side wall of the bell-shaped structure 142. A gap is formed between an upper portion of the outer side wall of the bell-shaped structure 142 and an inner side wall of the cover body 130. By providing the flange 145 on the outer side wall of the bell-shaped structure 142, a position at which the friction may occur between the bell-shaped structure 142 and the cover body 130 is located at the flange 145, rather than an entire outer side surface of the bell-shaped structure 142 contacting the cover body 130. Even if the friction occurs between the bell-shaped structure 142 and the cover body 130, the required friction force to be overcome is small and a cleaning process is not interrupted. In the embodiment shown in FIG. 5, the lubricating grease is arranged in the gap between the upper portion of the outer side wall of the bell-shaped structure 142 and the inner side wall of the cover body 130. The lubricating grease penetrates between the flange 145 and the cover body 130 to provide lubrication, thereby reducing friction, so that the rotation of the brush head assembly 200 is more stable, the vibration is weaker, and the noise is lower during use of the electric brush.

[0124] In some embodiments, the flange 145 arranged on the outer side wall of the bell-shaped structure 142 is a closed annular structure, that is, the flange 145 is closed along a circumferential direction of the bell-shaped structure 142. In other embodiments, the flange 145 can also be a plurality of protrusions arranged at intervals along the circumference on the outer peripheral surface 1523 of the bell-shaped structure.

[0125] An embodiment of the present disclosure provides an electric brush including a housing, a transmission unit 150, a brush head base 140, and a brush head assembly 200. The housing has a head portion 111 and a cover body 130 connected to the head portion 111. The cover body 130 has an opening end 133 and a closed end 132 opposite to each other. A first accommodation cavity 131 is arranged inside the cover body 130. The closed end 132 of the cover body 130 is recessed toward an interior of the head portion 111. A side surface of the cover body 130 is located between the opening end 133 and the closed end 132. The transmission unit 150 is arranged in the head portion 111. A first gear 151 of the transmission unit 150 is arranged toward the side surface of the cover body 130. A second gear 152 of the transmission unit 150 is arranged toward the closed end 132 of the cover body 130. The first gear 151 and the second gear 152 are both bevel gears. An included angle between a rotation axis of the first gear 151 and a rotation axis of the second gear 152 is 10°-80°. The brush head base 140 is rotatably connected to the cover body 130. The brush head base 140 is located in the first accommodation cavity 131 of the cover body 130 and is connected to the second gear 152 to rotate synchronously with the second gear 152. The brush head base 140 is a bell-shaped structure. An interior of the bell-shaped structure is provided with a second accommodation cavity 141. A lower end of the bell-shaped structure is provided with an opening communicating with the second accommodation cavity 141. A magnet connected to the bell-shaped structure is arranged in the second accommodation cavity 141. The brush head assembly 200 includes a mounting portion 220 and a connecting portion 230 and a cleaning portion 210 located on two sides of the mounting portion 220. Different cleaning portions 210 are arranged on the mounting portion 220, including brushes having different lengths or sizes or cloth brushes to meet cleaning requirements of different positions. Another magnet is arranged on the connecting portion 230. The connecting portion 230 of the brush head assembly 200 extends into the second accommodation cavity 141 from the opening to be magnetically connected with the magnet in the second accommodation cavity 141. In the electric brush, a suitable space is formed between the first gear 151 and the second gear 152, and the space is configured for installing the cover body 130 to facilitate installation of the brush head base 140, thereby making the structure of the head portion 111 more compact; and the brush head assembly 200 is connected to the bell-shaped structure of the brush head base 140 by magnetic attraction, making the installation and removal of the brush head assembly 200 more convenient, so as to replace the corresponding brush head assembly 200 according to different cleaning requirements.

[0126] The above-described contents are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure can be modified and varied. Any modification, equivalent replacement, improvement, or the like made without departing from the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.INDUSTRIAL APPLICABILITY

[0127] The electric brush handle and the electric brush provided in the present disclosure are applicable for cleaning tasks in various scenarios, such as kitchens, bathrooms, tile joints, and shoe uppers. The brush head assembly is driven to rotate through gear transmission, providing a compact structure, a small head size, and a reasonable gear layout. A detachable connection method, such as magnetic attraction, can be adopted between the brush head assembly and the brush head base, facilitating the replacement of corresponding brush head assemblies according to cleaning requirements, thereby enhancing the applicability and practicality of the product. The electric brush has a simple structure, is easy to manufacture, and is convenient to use, making it suitable for industrial production and promotion.

Examples

Embodiment Construction

[0024]To make the objectives, technical solutions, and advantages of embodiments of the present disclosure clearer, the following clearly and completely describes the technical solutions in embodiments of the present disclosure with reference to the drawings in embodiments of the present disclosure. It is clear that the described embodiments are merely some rather than all of embodiments of the present disclosure. The assemblies of embodiments of the present disclosure, as generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

[0025]Therefore, the following detailed descriptions of the embodiments of the present disclosure arranged in the drawings are not intended to limit the scope of the claimed disclosure, but merely to represent selected embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on embodiments of the present disclosure without inv...

Claims

1. An electric brush handle, comprising:a housing, wherein the housing is provided with a head portion and a cover body connected to the head portion, the cover body is provided with an opening end and a closed end opposite to each other, and a first accommodation cavity is arranged inside the cover body; the closed end of the cover body is recessed toward an interior of the head portion, and a side surface of the cover body is located between the opening end and the closed end;a transmission unit arranged within the head portion, wherein the transmission unit comprises a first gear and a second gear engaged with the first gear; the first gear is arranged toward the side surface of the cover body, and the second gear is arranged toward the closed end of the cover body; anda brush head base rotatably connected to the cover body, wherein the brush head base is located within the first accommodation cavity of the cover body and connected to the second gear to rotate synchronously with the second gear, and the brush head base is configured to connect a brush head assembly from one side of the opening end.

2. The electric brush handle according to claim 1, wherein the first gear is provided with a first surface facing the cover body, and a distance D1 between the first surface and the cover body is 3-5 mm; and the second gear is provided with a second surface facing the cover body, and a distance D2 between the second surface and the cover body is 1-3 mm.

3. The electric brush handle according to claim 2, wherein the cover body comprises a top plate having a through hole and a side plate along a direction from the closed end to the opening end; the top plate is located at the closed end; the opening end is located at one end of the side plate away from the top plate; the side plate is connected to the head portion; and the top plate is located within the head portion; the second surface is recessed in a direction away from the cover body; and the top plate is located within a recessed region of the second surface.

4. The electric brush handle according to claim 3, wherein the cover body further comprises a transition section having an increased diameter, and the side plate, the transition section, and the top plate are sequentially connected; the side surface of the cover body is located at the side plate and / or the transition section; the first surface is recessed in a direction away from the cover body; and the transition section protrudes toward the first surface in a rotation axis direction of the first gear.

5. The electric brush handle according to claim 1, wherein the housing is further provided with a handle portion and a neck portion, and the head portion, the neck portion, and the handle portion are sequentially arranged; and the electric brush handle further comprises a drive unit and a transmission shaft, the drive unit is arranged within the handle portion, the transmission shaft is arranged within the neck portion, one end of the transmission shaft is connected to the drive unit, and the other end of the transmission shaft is connected to the first gear.

6. The electric brush handle according to claim 5, wherein the first gear and the second gear are both bevel gears, and an included angle between a rotation axis of the first gear and a rotation axis of the second gear is 10°-80°.

7. The electric brush handle according to claim 5, wherein a tooth number ratio of the second gear to the first gear is within a range of 1.5-3.

8. The electric brush handle according to claim 7, wherein the drive unit comprises a motor and a speed reduction assembly; an output shaft of the motor is connected to an input shaft of the speed reduction assembly, and an output shaft of the speed reduction assembly is connected to the transmission shaft; and a transmission ratio of the speed reduction assembly is in a range of 30-40.

9. The electric brush handle according to claim 1, wherein one side of the head portion away from the opening end is of a conical structure, an outer peripheral surface of the second gear away from the opening end is a conical surface, and a distance D3 between an inner conical surface of the conical structure of the head portion and the conical surface of the second gear is 0.5-2 mm.

10. The electric brush handle according to claim 9, wherein the head portion further comprises a cylindrical structure, the cylindrical structure is connected to one side of the conical structure close to the opening end, the cover body is arranged within the cylindrical structure and is connected to an inner side of the cylindrical structure, and the second gear is arranged within the conical structure.

11. The electric brush handle according to claim 10, wherein the head portion is provided with a drainage hole, the drainage hole is located at a connection between the cover body and the cylindrical structure, and the drainage hole is located at one side of the connection away from the first gear.

12. The electric brush handle according to claim 1, wherein the second gear is connected with a gear shaft, and one end of the gear shaft extends into the closed end of the cover body and is connected to the brush head base.

13. The electric brush handle according to claim 12, wherein the gear shaft is further provided with a limiting member, and the limiting member is located at one side of the second gear away from the cover body, so as to limit a relative movement between the gear shaft and the second gear in an axial direction; and the limiting member is a snap ring or a pin.

14. The electric brush handle according to claim 1, wherein the brush head base is configured to detachably connect the brush head assembly; the brush head base comprises a bell-shaped structure, an interior of the bell-shaped structure is provided with a second accommodation cavity, and a lower end of the bell-shaped structure is provided with an opening communicating with the second accommodation cavity; and the opening is configured to insert the brush head assembly into the second accommodation cavity.

15. The electric brush handle according to claim 14, wherein a manner of detachably connecting the brush head assembly is a magnetic connection, a first connecting member configured to connect with the brush head assembly is arranged in the second accommodation cavity, and the first connecting member is a magnet or a ferromagnetic structural member.

16. The electric brush handle according to claim 14, wherein a lower portion of an outer side wall of the bell-shaped structure is provided with a flange, and a gap is formed between an upper portion of the outer side wall of the bell-shaped structure and an inner side wall of the cover body; ora lower end of the bell-shaped structure extends out of the first accommodation cavity from the opening end of the cover body in a direction away from the second gear; and the lower end of the bell-shaped structure has an annular plane, so that the annular plane forms annular surface contact with the brush head assembly when the brush head assembly is connected to the brush head base.

17. An electric brush, comprising a brush head assembly and the electric brush handle according to claim 1, wherein the brush head assembly comprises a mounting portion, and a connecting portion and a cleaning portion located on two sides of the mounting portion, and the connecting portion is connected to the brush head base.

18. The electric brush according to claim 17, wherein the brush head base comprises a bell-shaped structure, an interior of the bell-shaped structure is provided with a second accommodation cavity, and a lower portion of the bell-shaped structure is provided with an opening communicating with the second accommodation cavity; a first connecting member is arranged in the second accommodation cavity; andthe connecting portion is provided with a second connecting member, and the connecting portion extends from the opening into the second accommodation cavity to connect the first connecting member with the second connecting member.

19. The electric brush according to claim 18, wherein one of the first connecting member and the second connecting member is a magnet, and the other one of the first connecting member and the second connecting member is a ferromagnetic structural member; or both the first connecting member and the second connecting member are magnets.

20. The electric brush according to claim 19, wherein one of the first connecting member and the second connecting member is an annular structural member, and the other one of the first connecting member and the second connecting member is a block-shaped structural member; or both the first connecting member and the second connecting member are block-shaped structural members, whereinwhen the connecting portion is connected to the brush head base, one side surface of the first connecting member is arranged opposite to one side surface of the second connecting member; ora lower portion of the bell-shaped structure is in contact with the mounting portion, and a gap is arranged between the first connecting member and the second connecting member in a rotation axis direction of the brush head base.

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