Electric brush handle and electric brush

Abstract

The utility model provides an electric brush handle and an electric brush, and the electric brush handle comprises a shell, a transmission unit and a brush head seat. The shell is provided with a head and a cover body connected to the head, the cover body is provided with an open end and a closed end which are opposite, and a first containing cavity is formed in the cover body; the closed end of the cover body sinks towards the interior of the head, and the side face of the cover body is located between the open end and the closed end. The transmission unit is arranged in the head part; the transmission unit comprises a first gear and a second gear meshed with the first gear; the first gear faces the side face of the cover body, and the second gear faces the closed end of the cover body. The brush head seat is rotationally connected to the cover body, is positioned in the first accommodating cavity of the cover body and is connected with the second gear so as to synchronously rotate with the second gear; the brush head base is used for being connected with a brush head assembly from one side of the open end. The electric brush handle can drive the brush head assembly to rotate, the gear layout is reasonable, and the size of the head of the electric brush handle can be small.

Description

Technical Field

[0001] This application relates to the field of cleaning tools, and more specifically, to an electric brush handle and an electric brush. Background Technology

[0002] Small electric brushes are typically used for cleaning stovetops, kitchen countertops, tile grout, shoes, etc. Users usually hold the handle of the small electric brush when using it. However, existing electric brushes often have the following problems: their vibration is too strong, causing a strong vibration in the hand during use, making it difficult to grip the handle, and even leading to numbness after prolonged use; moreover, because of the strong vibration of the brush head, cleaning solution under the brush head is prone to splashing, increasing the difficulty of cleaning. Utility Model Content

[0003] The purpose of this application is to provide an electric brush handle that reduces vibration and noise during use of the electric brush.

[0004] In a first aspect, embodiments of this application provide an electric brush handle, including a housing, a transmission unit, and a brush head holder. The housing has a head and a cover connected to the head. The cover has an open end and a closed end, and the cover has a first receiving cavity inside. The closed end of the cover is recessed into the head, and the side of the cover is located between the open end and the closed end. The transmission unit is disposed inside the head. The transmission unit includes a first gear and a second gear meshing with the first gear. The first gear is disposed facing the side of the cover, and the second gear is disposed facing the closed end of the cover. The brush head holder is rotatably connected to the cover, located in the first receiving cavity of the cover, and connected to the second gear to rotate synchronously with the second gear. The brush head holder is used to connect a brush head assembly from the open end side.

[0005] In the above technical solution, the head serves to mount the transmission unit. The closed end of the cover is recessed into the head, and the brush head seat is located behind the first receiving cavity, resulting in a relatively small size at the head of the electric brush handle. Because the transmission shaft and the brush head seat are connected via a first gear and a second gear, i.e., the brush head seat is rotated by gear drive, vibrations during use are reduced, making the hand grip more comfortable and reducing the problem of cleaning fluid splashing. Furthermore, the gear drive also produces less noise. The arrangement of the first gear facing the side of the cover and the second gear facing the closed end of the cover allows for a more compact internal structure within the head of the electric brush handle, further reducing the size of the head.

[0006] In some alternative embodiments, the first gear has a first face facing the cover, and the distance D1 between the first face and the cover is 3-5 mm; the second gear has a second face facing the cover, and the distance D2 between the second face and the cover is 1-3 mm.

[0007] In the above technical solution, the distance between the first gear and the second gear and the cover is within the above range. This can make the head size of the electric brush handle smaller while making the distance between the first gear and the second gear and the cover appropriate, basically avoiding friction between the first gear and the second gear and the cover. This can make the electric brush have weak vibration and low noise when in use.

[0008] In some alternative embodiments, along the direction from the closed end to the open end, the cover includes a top plate with a through hole and a side plate; the top plate is located at the closed end; the open end is located at the end of the side plate away from the top plate; the side plate is connected to the head, and the top plate is located inside the head. A second surface is recessed in a direction away from the cover; the top plate is located within the recessed area of ​​the second surface.

[0009] In the above technical solution, the second gear is positioned towards the closed end of the cover and recessed towards the second surface of the cover, so that the shape of the second gear can adapt to the shape of the cover, making the internal structure of the electric brush handle head more compact and reasonable, while still ensuring that the electric brush has weak vibration and low noise during use.

[0010] In some alternative embodiments, the cover further includes a transition section with an increased diameter, the side plate, the transition section and the top plate are connected in sequence; the side of the cover is located on the side plate and / or the transition section; the first surface is recessed in a direction away from the cover, and the transition section protrudes toward the first surface in the direction of the rotation axis of the first gear.

[0011] In the above technical solution, the cover has a structure that is smaller at the top and larger at the bottom; in addition, the first gear is set towards the side of the cover and the first surface of the cover is recessed, making the structure inside the electric brush handle head more compact and reasonable; and it will not affect the drive transmission between the first gear and the second gear, so that the electric brush can still have weak vibration and low noise when in use.

[0012] In some alternative embodiments, the housing also has a handle portion and a neck portion, with the head, neck portion and handle portion arranged sequentially; the electric brush handle also includes a drive unit and a drive shaft, the drive unit being disposed inside the handle portion and the drive shaft being disposed in the neck portion, with one end of the drive shaft connected to the drive unit and the other end connected to the first gear.

[0013] In the above technical solution, the drive unit is located in the handle, the transmission shaft is located in the neck, the first gear is located between the head and the neck, and the second gear is located in the head. This layout makes the electric brush handle layout more reasonable and easier to miniaturize. Furthermore, by using this drive method in conjunction with the first and second gears to drive the rotation, the electric brush can have weak vibration and low noise during use.

[0014] In some alternative implementations, the first gear and the second gear are bevel gears, and the angle between the rotation axis of the first gear and the rotation axis of the second gear is 10°-80°.

[0015] In the above technical solution, the first gear and the second gear are bevel gears, and the included angle between their axes is within the aforementioned range. Furthermore, the first gear is positioned towards the side of the cover, and the second gear is positioned towards the closed end of the cover, creating a suitable space between them. This space is used to install the cover for mounting the brush head holder, resulting in a more compact head structure. Additionally, since the rotation axes of the first and second gears are within the aforementioned range, and the axis of the adaptable handle has a certain angle with the axis of the brush head holder, it is convenient for the user to grip the handle during use, and reduces hand fatigue during prolonged use.

[0016] In some alternative implementations, the first gear and the second gear are spur gears or helical gears.

[0017] In the above technical solution, both the first bevel gear and the second bevel gear are straight teeth, which can achieve meshing between the two; if both are helical teeth, the tooth length is longer under the same axial distance, which can increase the meshing strength between the two, so that the meshing of the first gear and the second gear is more secure and there will be no slippage after long-term use.

[0018] In some alternative implementations, the ratio of the number of teeth of the second gear to the number of teeth of the first gear is in the range of 1.5-3.

[0019] In the above technical solution, the first gear is located between the head and the neck, and the second gear is located in the head. The neck is smaller, so the first gear is smaller, which makes the brush handle structure more compact. The second gear is relatively larger, so the cover structure is larger, which is conducive to the installation of the brush head seat and the brush head assembly. On the other hand, it can also reduce the rotation speed of the second gear, so as to avoid the splashing of cleaning fluid under the brush head assembly when the brush head assembly is in use.

[0020] In some alternative implementations, the drive unit includes a motor and a reduction gear assembly; the output shaft of the motor is connected to the input shaft of the reduction gear assembly, and the output shaft of the reduction gear assembly is connected to the transmission shaft; the transmission ratio of the reduction gear assembly is in the range of 30-40.

[0021] In the above technical solution, the motor is reduced in speed by the reduction assembly, which makes the torque output of the brush head seat more appropriate. This can reduce the splashing of cleaning fluid, shorten the cleaning time, and achieve a higher degree of cleanliness.

[0022] In some alternative implementations, the side of the head away from the opening end is a conical structure, the outer peripheral surface of the second gear away from the opening end is a conical surface, and the distance D3 between the inner conical surface of the head's conical structure and the conical surface of the second gear is 0.5-2mm.

[0023] In the above technical solution, the portion of the head furthest from the opening is a conical structure. This conical structure serves as a guide when the handle of the electric brush is inserted into the slit. The distance between the inner conical surface of the conical structure and the conical surface of the second gear is within the aforementioned range, allowing for a more compact structure of the electric brush head. Furthermore, the likelihood of friction between the second gear and the inner conical surface of the conical structure is reduced, resulting in less vibration and noise during use of the electric brush.

[0024] In conjunction with the first aspect, in some alternative embodiments, the head also includes a cylindrical structure connected to the side of the conical structure near the opening end, a cover disposed within the cylindrical structure and connected to the inner side of the cylindrical structure, and a second gear disposed within the conical structure.

[0025] In the above technical solution, the cover is basically not exposed, which makes the brush head more aesthetically pleasing; in addition, the cylindrical structure is easy to adapt to the side plate of the cover, which facilitates the installation of the two and makes the structure more compact.

[0026] In conjunction with the first aspect, in some alternative embodiments, the head is provided with a drain hole located on the side of the cover away from the first gear.

[0027] In the above technical solution, by setting the drain hole on the side of the cover away from the first gear, it is convenient for the user to shake out the liquid that has entered the head of the electric brush handle when holding the handle. In addition, water will accumulate next to the drain hole when draining. Since the drain hole is far from the first gear, the water accumulated next to the drain hole will not have a significant impact on the lubrication of the first gear. If the tail of the handle is hung up, the water can be automatically discharged from the drain hole, making drainage more convenient.

[0028] In conjunction with the first aspect, in some alternative implementations, the second gear is connected to a gear shaft, one end of which extends into the closed end of the cover and is connected to the brush head seat.

[0029] In the above technical solution, the gear shaft of the second gear extends directly into the cover and connects to the brush head seat. This allows the second gear to rotate synchronously and drive the brush head seat to rotate, resulting in smoother rotation of the brush head seat and less vibration and noise during use of the electric brush.

[0030] In conjunction with the first aspect, in some alternative embodiments, the gear shaft is also provided with a limiting element, which is located on the side of the second gear away from the cover, to limit the relative movement of the gear shaft and the second gear in the axial direction; the limiting element is a snap ring or a pin.

[0031] In the above technical solution, by limiting the movement of the second gear relative to the gear shaft by the limiting component, the friction between the second gear and the outer casing caused by the movement of the second gear relative to the gear shaft can be avoided, thereby making the electric brush less vibrating and less noisy when in use.

[0032] In conjunction with the first aspect, in some alternative embodiments, the brush head holder is used to detachably connect the brush head assembly; the brush head holder includes a bell-shaped structure having a second receiving cavity inside and an opening at the lower end communicating with the second receiving cavity; the opening is used to insert the brush head assembly into the second receiving cavity.

[0033] In the above technical solution, the second receiving cavity of the bell-shaped structure has an opening, through which the brush head assembly is installed, making it easier to assemble and disassemble the brush head assembly. In addition, it can make the installation depth of the brush head assembly more reasonable, which can make the head size smaller and also make the brush head assembly have a better fit with the brush head seat in the circumferential direction when rotating, making the rotation of the brush head more stable, and making the electric brush less vibrating and less noisy when used.

[0034] In conjunction with the first aspect, in some alternative implementations, the brush head assembly is detachably connected by magnetic connection, and the second receiving cavity is provided with a first connector for connecting to the brush head assembly, the first connector being a magnet or ferromagnetic structural component.

[0035] In the above technical solution, a bell-shaped structure is used to connect the brush head assembly and the brush head base by magnetic attraction, which makes it easier to disassemble and assemble the brush head assembly, allowing for the replacement of the corresponding brush head assembly according to different cleaning needs.

[0036] In conjunction with the first aspect, in some alternative embodiments, the lower part of the outer wall of the bell-shaped structure is provided with a flange, and there is a gap between the upper part of the outer wall of the bell-shaped structure and the inner wall of the cover.

[0037] In the above technical solution, by providing a flange on the outer wall of the bell-shaped structure, the rotation of the brush head assembly connected to the brush head holder is made smoother when the brush head holder rotates. The area of ​​the brush head holder other than the flange essentially does not contact the cover, thus reducing friction between the brush head holder and the cover and minimizing its impact on the rotation of the brush head holder. The gap between the upper part of the outer wall of the bell-shaped structure and the inner wall of the cover not only prevents friction caused by contact between the upper part of the bell-shaped structure and the cover, but also allows for the placement of lubricating grease, further reducing friction between the bell-shaped structure and the cover. This results in smoother rotation of the brush head assembly during use, with less vibration and lower noise.

[0038] In conjunction with the first aspect, in some alternative embodiments, the lower end of the bell-shaped structure has an annular plane so that when the brush head assembly is attached to the brush head seat, the annular plane forms an annular surface contact with the brush head assembly.

[0039] In the above technical solution, since the lower end of the bell-shaped structure has an annular plane for forming an annular surface contact with the brush head assembly, the brush head seat contacts the mounting part in the circumferential direction of the brush head seat rotation direction. This makes the force on the brush head assembly more uniform after installation. When the brush head assembly tends to deflect in any direction due to the force, the brush head seat can provide better support for the mounting part of the brush head assembly, and it is less likely to deflect relative to the bell-shaped structure.

[0040] In conjunction with the first aspect, in some alternative implementations, the lower end of the bell-shaped structure extends from the opening end of the cover toward the first receiving cavity in a direction away from the second gear.

[0041] In the above technical solution, when the axial dimension of the head is relatively small, the axial space of the second receiving cavity of the brush head seat can be increased. After the brush head assembly is installed in the bell-shaped brush head seat, the brush head seat wraps the brush head assembly better in the circumferential direction, so that the brush head assembly can have a better fit with the brush head seat in the circumferential direction when rotating, and the rotation of the brush head is more stable. This can make the electric brush have less vibration and less noise when in use.

[0042] Secondly, embodiments of this application provide an electric brush, including the electric brush handle provided in the first aspect. The brush head assembly includes a mounting portion, and a connecting portion and a cleaning portion located on both sides of the mounting portion. The connecting portion is connected to the brush head seat.

[0043] In the above technical solution, the brush head assembly has a cleaning section, which can be used to clean dirt; since the brush head seat is driven to rotate by gear transmission, and then the brush head seat drives the brush head assembly to rotate, the vibration generated during use can be reduced, making it more comfortable for the user to hold, and the problem of cleaning fluid splashing can be improved, and the noise of gear drive rotation is also smaller.

[0044] In conjunction with the second aspect, in some alternative embodiments, the brush head holder includes a bell-shaped structure with a second receiving cavity inside and an opening at the bottom communicating with the second receiving cavity; a first connector is disposed inside the second receiving cavity; a connecting part is provided with a second connector, the connecting part extending from the opening into the second receiving cavity to connect the first connector and the second connector.

[0045] In the above technical solution, the connecting part extends into the second receiving cavity from the opening to connect the first connecting member and the second connecting member, thereby realizing the connection between the brush head holder and the brush head assembly. This connection method allows the brush head assembly to be directly inserted into the second receiving cavity for connection, making operation convenient. Furthermore, after the connecting part extends into the second receiving cavity, the brush head holder has a certain wrapping effect on the connecting part, which can further limit the deflection of the brush head assembly after being subjected to force.

[0046] In conjunction with the second aspect, in some alternative implementations, one of the first connector and the second connector is a magnet and the other is a ferromagnetic structural component; or both the first connector and the second connector are magnets.

[0047] In the above technical solution, the brush head holder and the brush head assembly are connected by magnetic attraction through the first connector and the second connector, which facilitates the disassembly and assembly of the brush head assembly so that the corresponding brush head assembly can be replaced according to the cleaning of different areas.

[0048] In conjunction with the second aspect, in some optional implementations, one of the first connector and the second connector is a ring-shaped structure and the other is a block-shaped structure; or, both the first connector and the second connector are block-shaped structures; when the connecting part is connected to the brush head seat, one side surface of the first connector and one side surface of the second connector are arranged opposite to each other.

[0049] In the above technical solution, the first and second connectors, whether block-shaped or ring-shaped, can be connected by magnetic attraction. When the brush head assembly is connected to the brush head base, the surfaces of the first and second connectors are arranged opposite each other, which increases the magnetic force between them, thus making the connection between the brush head assembly and the brush head base more reliable.

[0050] In conjunction with the second aspect, in some alternative embodiments, the lower part of the bell-shaped structure contacts the mounting part, and the first connector and the second connector have a gap in the direction of the rotation axis of the brush head seat.

[0051] In the above technical solution, when the lower part of the bell-shaped structure contacts the mounting part, the movement of the brush head assembly along the rotation axis of the brush head seat is restricted, maintaining a gap between the first and second connecting members in that direction. That is, during the insertion of the brush head assembly into the second receiving cavity, the contact between the bell-shaped structure and the mounting part acts as a limit, preventing the first and second connecting members from colliding under magnetic attraction, thus effectively preventing damage to the magnet.

[0052] In conjunction with the second aspect, in some alternative embodiments, the direction in which the connecting part inserts into the second receiving cavity from the opening is defined as the insertion direction, and the cross-sectional profiles of the connecting part and the second receiving cavity perpendicular to the insertion direction are both polygonal, so that the brush head seat drives the brush head assembly to rotate.

[0053] In the above technical solution, since the cross-sectional profile of the connecting part and the second receiving cavity is polygonal in the direction perpendicular to the insertion direction, when the brush head seat and the brush head assembly rotate synchronously, the rotation between the brush head seat and the brush head assembly is more consistent and the rotation of the brush head assembly is more stable. This can reduce the vibration of the electric brush during use and also prevent the cleaning fluid from splashing when the electric brush is cleaning.

[0054] In conjunction with the second aspect, in some alternative implementations, the brush head holder and the connecting part are connected by a first connector and a second connector through a plug-in or snap-fit ​​connection.

[0055] In the above technical solution, the first connector and the second connector are plugged in or snapped together, which allows the brush head assembly to be disassembled and assembled, so as to replace the corresponding brush head assembly according to different cleaning needs.

[0056] In conjunction with the second aspect, in some alternative embodiments, the side of the mounting part facing away from the connecting part is an arc-shaped surface that protrudes away from the connecting part; the cleaning part is a brush with bristles that extend in a direction perpendicular to the arc-shaped surface.

[0057] In the above technical solution, since the bristles extend in a direction perpendicular to the arc surface, the bristles are durable and not easily deformed. Furthermore, the bristles extend outward from the end away from the mounting part, which facilitates cleaning of corners. Attached Figure Description

[0058] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1A schematic diagram of an electric brush provided in an embodiment of this application from a first-view perspective;

[0060] Figure 2 A schematic diagram of an electric brush provided in an embodiment of this application from a second perspective;

[0061] Figure 3 A schematic diagram of the electric brush head provided in an embodiment of this application;

[0062] Figure 4 A cross-sectional view of the head of an electric brush provided in an embodiment of this application;

[0063] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0064] Figure 6 A cross-sectional view of the electric brush handle provided in an embodiment of this application;

[0065] Figure 7 A cross-sectional view of the head of an electric brush handle provided in an embodiment of this application;

[0066] Figure 8 A schematic diagram illustrating the arrangement of the first gear and the second gear as provided in an embodiment of this application;

[0067] Figure 9 for Figure 1 The diagram shown is a schematic of the electric brush after the brush head assembly, cover and end cap have been removed.

[0068] Figure 10 for Figure 9 A schematic diagram after the pressure plate has been removed;

[0069] Figure 11 This is a schematic diagram of the shell body provided in the embodiments of this application;

[0070] Figure 12 A cross-sectional view of the head of the shell body provided in an embodiment of this application;

[0071] Figure 13 A schematic diagram of a brush head assembly provided in one embodiment of this application;

[0072] Figure 14 A schematic diagram of a brush head assembly provided in another embodiment of this application from a first-view perspective;

[0073] Figure 15 for Figure 14 A schematic diagram of the brush head assembly from a second-view perspective.

[0074] Icons: 100-Electric brush handle; 111-Head; 1111-Conical structure; 1112-Cylindrical structure; 1113-Annular plate structure; 112-Neck; 113-Handle section; 1131-Anti-slip section; 120-Shell body; 121-First opening; 122-Second opening; 123-Drain hole; 130-Cover; 131-First receiving cavity; 132-Closed end; 133-Open end; 134-Top plate; 135-Transition section; 136-Side plate; 137-First bushing; 140-Brush head holder; 141-Second receiving cavity 142-Cavity; 143-Bell-shaped structure; 144-First connector; 145-Annular plane; 146-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-Pressure plate; 173-Second bushing; 174-End cap; 180-Power supply; 200-Brush head assembly; 210-Cleaning section; 220-Mounting section; 230-Connecting section; 231-Second connector. Detailed Implementation

[0075] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0076] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0077] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0078] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0079] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0080] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0081] Typically, some existing electric brushes that can be held and used with one hand are noisy during use, affecting the user experience; others have large heads, making it difficult to insert them into narrow gaps for use.

[0082] Based on this, this application provides an electric brush that, by employing a low-noise transmission unit and rationally configuring the position of the transmission unit and the structure of the electric brush handle head, achieves low noise and weak vibration while maintaining a small electric brush handle head size. The electric brush head is where the brush head assembly is located. The electric brush head includes the head of the electric brush handle; therefore, a smaller electric brush handle head allows for a smaller electric brush head as well.

[0083] like Figure 1 and Figure 2 and Figure 13 As shown, the electric brush provided in this application embodiment includes an electric brush handle 100 and a brush head assembly 200 having a cleaning section 210, wherein the cleaning section 210 is used to clean by directly contacting dirt.

[0084] like Figures 1 to 4As shown, the electric brush handle 100 includes a housing, which is the outer structure visible to the naked eye and is used for the user to hold. The housing has a head 111 and a cover 130 connected to the head 111. Figure 11 and Figure 12 As shown, the cover 130 has an open end 133 and a closed end 132; the closed end 132 of the cover 130 is recessed into the head 111. Figure 4 As shown, a brush head holder 140 is rotatably connected to the cover 130. The brush head holder 140 is used to connect the brush head assembly 200 from the side near the opening end 133, so that the brush head holder 140 can rotate together with the brush head assembly 200. Please refer to... Figure 7 and Figure 12 The brush head holder 140 is located in the first receiving cavity 131 of the cover 130. The first receiving cavity 131 of the cover 130 is formed by the closed end 132 of the cover 130 recessing into the head 111. The open end 133 of the cover 130 is used to insert the brush head holder 140 into the first receiving cavity 131. The closed end 132 of the cover 130 does not mean that the closed end 132 is completely closed without any holes, but rather that the closed end 132 cannot be passed through by the brush head holder 140. Because the closed end 132 of the cover 130 is recessed into the head 111, and the brush head holder 140 is located after the first receiving cavity 131, the size of the head position of the electric brush handle 100 is relatively small, and correspondingly, the size of the electric brush head is also relatively small.

[0085] Please refer to Figure 6 , Figure 7 , Figure 9 and Figure 10 The head 111 also contains a transmission unit 150, which includes a first gear 151 and a second gear 152 meshing with the first gear 151. Please refer to... Figure 7 and Figure 12 The first gear 151 is positioned facing the side of the cover 130, and the second gear 152 is positioned facing the closed end 132 of the cover 130. The side of the cover 130 is located between the open end 133 and the closed end 132, and further, the side of the cover 130 is located on the outer side of the cover 130. The transmission unit 150 within the housing 120 is used for transmission connection with the brush head holder 140. Specifically, the second gear 152 is connected to the brush head holder 140 to rotate synchronously with it. Because the brush head holder 140 is driven to rotate by gear transmission, the electric brush exhibits weak vibration and low noise during use.

[0086] The electric brush provided in this application uses gear transmission to drive the brush head holder 140 and brush head assembly 200 to rotate, thus reducing the noise generated during use. Furthermore, according to... Figure 7The arrangement shown, with the first gear 151 facing the side of the cover 130 and the second gear 152 facing the closed end 132 of the cover 130, allows for a more compact structure within the head of the electric brush handle 100, resulting in a smaller head size for the electric brush.

[0087] In this application, when the electric brush is working, the first gear 151 and the second gear 152 rotate relative to the cover 130. To reduce friction between the first gear 151, the second gear 152 and the cover 130, in some embodiments, the first gear 151 has a first surface facing the cover 130, and the distance D1 between the first surface and the cover 130 is 3-5 mm, specifically 3 mm, 3.6 mm, 4 mm or 5 mm; wherein, this distance refers to the minimum clearance between the first gear 151 and the cover 130. The second gear 152 has a second surface facing the cover 130, and the distance D2 between the second surface and the cover 130 is 1-3 mm, specifically 1 mm, 1.2 mm, 2 mm or 3 mm; wherein, this distance refers to the minimum clearance between the second gear 152 and the cover 130. In this application, the distance range provided in this embodiment reduces the likelihood of friction between the first gear 151, the second gear 152, and the cover 130, while also making the structure of the electric brush handle 100 head more compact and smaller in size. In other embodiments, the distance between the first surface of the first gear 151 and the cover 130, and the distance between the second surface of the second gear 152 and the cover 130, may also be outside the aforementioned range.

[0088] In such Figure 12In the illustrated embodiment, the cover 130 includes a top plate 134, a transition section 135 with an increasing diameter, and a side plate 136 forming an annular shape, arranged sequentially from the closed end 132 to the open end 133. The top plate 134 is located at the closed end 132, the side of the cover 130 is located on the side plate 136 or the transition section 135, and the open end 133 is located at the end of the side plate 136 away from the top plate 134. The side plate 136 is connected to the head 111, specifically, it can be integrally formed. Since the closed end 132 of the cover 130 is recessed into the head 111, the top plate 134 is located inside the head 111. The top plate 134 also has a through hole so that the gear shaft 1521 of the second gear 152 can pass through the cover 130 and connect to the brush head holder 140. It is easy to understand that in this embodiment, the top plate 134, the transition section 135, and the side plate 136 form a first receiving cavity 131. The lower end of the side plate 136 is an opening 133 connecting to the first receiving cavity 131, and the cover 130 is a bell-shaped structure with uniform wall thickness. In other embodiments, the cover 130 can also adopt other structures, such as the cover including only the side plate and the top plate but not the transition section; or the cover including only the side plate and the transition section, with the transition section having a through hole for the gear shaft of the second gear to pass through; the side plate 136 may also not form a ring, such as... Figure 4 As shown, the left side of the transition section 135 of the cover 130 is connected to the head 111, and the right side of the side plate of the cover 130 is connected to the head 111, forming a cover 130 structure with a notch.

[0089] Furthermore, such as Figure 7 and Figure 12 As shown, the first surface of the first gear 151 and the second surface of the second gear 152 are both recessed away from the cover 130. The top plate 134 is located within the recessed area of ​​the second surface, and the transition section 135 protrudes towards the first surface in the direction of the rotation axis of the first gear 151. The top plate 134 being located within the recessed area of ​​the second surface means that, in the direction of the rotation axis 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, resulting in a smaller size of the electric brush head in that direction. Similarly, the protrusion of the transition section 135 towards the first surface in the direction of the rotation axis of the first gear 151 also reduces the size of the electric brush head in that direction. In other words, the structural shapes of the first gear 151 and the second gear 152 match the shape of the cover 130, allowing for the arrangement of the first gear 151 and the second gear 152 within a limited space. This results in a more compact internal structure of the electric brush handle 100, higher space utilization, and a smaller head size for the electric brush handle 100.

[0090] Please refer to Figure 1 and Figure 2In one embodiment of this application, the outer casing has a handle portion 113, a neck 112, and a head 111 arranged sequentially. The handle portion 113 is for the user to grip, and an anti-slip portion 1131 may be provided on the outer side of the handle portion 113. The head 111 is the portion connected to the brush head holder 140. The neck 112 is located between the handle portion 113 and the head 111, serving to connect the handle portion 113 and the head 111. The handle portion of the electric brush is also the handle portion of the electric brush handle 100, which includes the handle portion 113 of the outer casing. The neck of the electric brush is also the neck of the electric brush handle 100, which includes the neck 112 of the outer casing. The head of the electric brush includes the head of the electric brush handle 100 and also includes a brush head assembly 200 connected to the brush head holder 140. The head of the electric brush handle 100 includes the head 111 of the outer casing, and the head 111 of the outer casing includes the head of the casing body 120.

[0091] A drive unit 160 is housed within the handle portion 113, and a transmission shaft 153 is housed within the neck portion 112. A second gear 152 is located at the head portion 111 and on the side where the closed end 132 of the cover 130 is located. The cover 130 is located at the head portion 111 of the outer shell. The drive unit 160 is connected to the transmission shaft 153. The power output from the drive unit 160 drives the brush head holder 140 to rotate after passing through the transmission shaft 153, the first gear 151, and the second gear 152, thereby causing the brush head assembly 200 to move.

[0092] In some embodiments of this application, both the first gear 151 and the second gear 152 are bevel gears, and the angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is α, where α is between 10° and 80°. Please refer to... Figure 8That is, the angle formed by the rotation axis of the first gear 151 from the first face to the cover 130 and the rotation axis of the second gear 152 from the second face to the cover 130 is 10°-80°; the smaller the angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 (that is, the closer to 10°), the larger the angle between the first face of the first gear 151 and the second face of the second gear 152; the larger the angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 (that is, the closer to 80°), the smaller the angle between the first face of the first gear 151 and the second face of the second gear 152. In this embodiment, the first gear 151 and the second gear 152 are bevel gears, and the included angle between their axes is within the aforementioned range. The first gear 151 is positioned towards the side of the cover 130, and the second gear 152 is positioned towards the closed end 132 of the cover 130. This allows for the formation of a suitable space between the first gear 151 and the second gear 152, which is used to install the cover 130 for mounting the brush head holder 140, resulting in a more compact structure for the head 111. Furthermore, since the rotation axes of the first gear 151 and the second gear 152 are within the aforementioned range, and the axis of the adaptable handle 113 has a certain angle with the axis of the brush head holder 140, the user can easily grip the handle 113 during use, and it is less tiring to hold the hand during prolonged use.

[0093] In the embodiments provided in this application, the first gear 151 and the second gear 152 can be spur gears and helical gears, respectively. In embodiments where both the first gear 151 and the second gear 152 are helical gears, the transmission between the first gear 151 and the second gear 152 is smoother and generates less noise during operation. Furthermore, with the same axial distance, the longer tooth length can increase the meshing strength between the two gears, making the meshing of the first gear 151 and the second gear 152 more secure and preventing slippage even after prolonged use.

[0094] In some embodiments, the number of teeth of the first gear 151 is less than the number of teeth of the second gear 152, and correspondingly, the radial dimension of the first gear 151 is less than the radial dimension of the second gear 152. Please refer to... Figure 1 and Figure 7Since the gear shaft 1521 of the second gear 152 is connected to and drives the brush head seat 140 to rotate, the size of the head of the electric brush handle 100 in the direction of the rotation axis of the brush head seat 140 (that is, the direction of the rotation axis of the second gear 152) is affected not only by the radial size of the second gear 152, but also by the radial size of the first gear 151. Therefore, since the number of teeth of the first gear 151 is smaller than that of the second gear 152, the head of the electric brush handle 100 can have a smaller size in the direction of the rotation axis of the brush head seat 140, thus allowing it to be used in narrower gaps. Furthermore, in this embodiment, since the number of teeth of the first gear 151 is smaller than that of the second gear 152, it can also reduce speed, thereby increasing the torque that the gear shaft 1521 of the second gear 152 can output, thus enabling the cleaning of more stubborn dirt.

[0095] In some embodiments, the gear ratio of the second gear 152 to the first gear 151 is between 1.5 and 3, specifically 13:7. According to... Figure 6 and Figure 7 In the configuration shown, the first gear 151 is positioned between the head 111 and the neck 112, and the second gear 152 is positioned at the head 111. The neck 112 is smaller, and the corresponding first gear 151 is smaller, which allows for a more compact brush handle structure. The second gear 152 is relatively larger, and the corresponding cover 130 has a larger structure, which facilitates the installation of the brush head holder 140 and the brush head assembly 200. On the other hand, it can also reduce the rotational speed of the second gear 152, preventing the cleaning fluid below the brush head assembly 200 from splashing during use.

[0096] In some other embodiments, the number of teeth of the first gear 151 may be less than or equal to the number of teeth of the second gear 152, that is, the ratio of the number of teeth of the second gear 152 to the number of teeth of the first gear 151 may be in other ranges.

[0097] In some embodiments, the drive unit 160 includes a motor and a reduction gear assembly. The output shaft of the motor is connected to the input shaft of the reduction gear assembly, and the output shaft of the reduction gear assembly is connected to the transmission shaft 153. The transmission ratio of the reduction gear assembly is in the range of 30-40, specifically 32:1, 35:1, 38:1, or 40:1. In this embodiment, the reduction gear assembly reduces the speed of the motor, thereby controlling the rotational speed of the brush head holder 140 and the brush head assembly 200 within a reasonable range, resulting in lower noise. It also increases the load that the electric brush can withstand during operation, thus enabling the cleaning of more stubborn dirt. Furthermore, the reduction gear assembly can be a gear reducer or other existing devices capable of speed reduction. Furthermore, a power supply 180 can be provided in the handle 113 to supply power to the drive unit 160. In other embodiments, the electric brush can also employ other driving methods and corresponding structures.

[0098] Please refer to Figure 6 and Figure 7 In some embodiments of this application, the head 111 of the outer casing has a tapered structure 1111 at the opening end 133 away from the cover 130. The outer peripheral surface 1523 of the second gear 152 away from the opening end 133 is a tapered surface, wherein the outer peripheral surface of the second gear 152 forms the boundary of the second gear 152 in the radial direction. Figure 9 and Figure 10 In the illustrated embodiment, the second gear 152 has two outer peripheral surfaces. The first outer peripheral surface is located on the side of the second gear 152 facing the opening end 133 and surrounds the second surface of the second gear 152 inside. The second outer peripheral surface 1523 is located on the side of the second gear 152 away from the opening end 133 and is connected to the first outer peripheral surface. Figure 7 , Figure 9 and Figure 10As shown, the inner conical surface of the conical structure 1111 of the outer casing is positioned opposite to the conical surface of the second gear 152. Furthermore, the distance D3 between the inner conical surface of the conical structure 1111 of the head 111 of the outer casing 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 this distance refers to the minimum gap between the conical surface of the second gear 152 and the inner conical surface of the conical structure 1111 of the outer casing. In this embodiment, the portion of the head 111 of the outer casing away from the opening end 133 is a conical structure. That is, during the use of the electric brush, the side of the head 111 away from the ground is a conical structure 1111. When the electric brush is inserted into the slit, the conical structure 1111 can serve as a guide. By controlling the distance between the inner conical surface of the conical structure 1111 and the conical surface of the second gear 152 within the aforementioned range, the structural layout inside the electric brush head can be made more compact, resulting in a smaller size of the electric brush head. Furthermore, this reduces the likelihood of friction between the second gear 152 and the inner conical surface of the conical structure 1111, thus reducing the vibration and noise of the electric brush during use.

[0099] For further details, please refer to... Figure 1 , Figure 2 , Figure 4 and Figure 7 The head 111 also includes a cylindrical structure 1112, which is connected to the side of the conical structure 1111 near the opening end 133. The cover 130 is disposed inside the cylindrical structure 1112 and connected to the inner side of the cylindrical structure 1112. Figure 1 In the illustrated embodiment, the cylindrical structure 1112 has a cylindrical surface, the axis of which coincides with the axis of the cover 130 and the rotation axis of the brush head holder 140. In other embodiments, the cylindrical structure 1112 may also have a prismatic surface. Figure 3 , Figure 11 and Figure 12 In the embodiment shown, the opening end 133 of the cover 130 is indirectly connected to the cylindrical structure 1112 via an annular plate structure 1113; further, as Figure 12 As shown, the opening end 133 of the cover 130 can protrude from the annular plate-shaped structure 1113; alternatively, the opening end 133 of the cover 130 can be flush with the annular plate-shaped structure 1113. When flush, the cover 130 is essentially not exposed, making the brush head more aesthetically pleasing. Furthermore, the columnar structure 1112 easily adapts to the side plate 136 of the cover 130, facilitating installation and resulting in a more compact structure. Please refer to... Figures 8 to 12 The conical structure 1111, the cylindrical structure 1112, the annular plate structure 1113, and the cover 130 enclose a certain space, and the second gear 152 is set in this space. Specifically, the second gear 152 is set in the conical structure 1111.

[0100] In some embodiments, such as Figure 7 , Figures 9 to 11 As shown, the outer casing includes a casing body 120 and a cover 171. The head of the casing body 120 and the head of the cover 171 form the head 111 of the outer casing of the electric brush handle. The neck of the casing body 120 and the neck of the cover 171 form the neck 112 of the outer casing of the electric brush handle. The handle portion of the casing body 120 and the handle portion of the cover 171 form the handle portion 113 of the outer casing of the electric brush handle. A cover 130 is disposed on the casing body 120 of the head 111 and connected to the casing body 120 of the head 111. Optionally, the closed end of the cover 130 is recessed into the casing body 120 of the head 111, and the cover 130 is integrally formed with the casing body 120.

[0101] Furthermore, the housing body 120 has a first opening 121 on the side away from the brush head holder 140. The first opening 121 is used to insert the drive shaft 153 into the neck 112 of the housing and to insert the second gear 152 into the head 111 of the housing. The cover 171 is used to close the first opening 121. Figure 7 and Figure 12 As shown, the tapered structure of the head 111 of the outer shell is located at the head of the cover 171, and the cylindrical structure 1112 of the head 111 of the outer shell is located at the head of the shell body 120. The shell body 120 also has a second opening 122 at the end away from the head 111 (the end of the handle portion 113). The shell body 120 has a mounting cavity for mounting the drive unit 160, and the second opening 122 communicates with the mounting cavity to allow the drive unit 160 to be installed. The second opening 122 is also covered by an end cap 174. Optionally, a battery and circuit board can also be installed in the mounting cavity to provide power to the motor and control the rotation of the motor via the circuit board.

[0102] In some embodiments, the cover 171 can be connected to the shell body 120 to fix the drive shaft 153 and the second gear 152, etc. Fixing the drive shaft 153 and the second gear 152 means that the second gear 152 and the drive shaft 153 can rotate normally in a preset installation position to drive the brush head holder 140 to rotate; it does not mean that the second gear 152 and the drive shaft 153 are fixed relative to the shell body 120. Optionally, a drive shaft sleeve is also provided inside the neck of the shell body 120, and the drive shaft 153 is disposed inside the drive shaft sleeve. The inner wall of the shell body 120 is provided with multiple slots arranged sequentially along the axial direction of the drive shaft 153. The drive shaft sleeve is engaged in the slots to fix the drive shaft 153, so that the drive shaft 153 can rotate coaxially and synchronously with the first gear 151.

[0103] In other implementations, such as Figure 7 and Figure 9 As shown, a pressure plate 172 can also be provided between the housing body 120 and the cover 171 to fix the drive shaft 153 and the second gear 152 to the housing body 120. The pressure plate 172 can be connected to the housing body 120 by threaded fasteners, or the pressure plate 172 can be connected to the cover 171 by threaded fasteners, or other connection methods can be used. In this embodiment, the cover 171 may only serve to cover the first opening 121 and does not serve to fix the drive shaft 153 and the second gear 152. Therefore, the cover 171 can be bonded or snapped to the housing body 120. In addition, an aesthetically pleasing cover 171 can be used to give the electric brush handle 100 a better appearance.

[0104] In some embodiments, to facilitate the drainage of liquid that enters the housing during the cleaning process, the housing body 120 is also provided with a drain hole 123. The drain hole 123 can be located at the head of the electric brush, specifically, at the head of the electric brush handle 100, at the head of the housing body 120, at the neck 112 of the electric brush handle 100, or at the neck of the housing body 120. Figure 3 In the illustrated embodiment, the drain hole 123 is located at the head of the electric brush handle 100 and on the side of the cover 130 away from the first gear 151, so that the liquid inside the head can be flung out through the drain hole 123 by a swinging motion; the drain hole 123 may be located on the annular plate structure 1113 connecting the cover 130 and the cylindrical structure 1112, or it may be located on the cylindrical structure 1112 or the conical structure 1111, or in other positions; according to Figure 3 The illustrated embodiment includes a drain hole 123, which is located away from the first gear 151. During drainage, water accumulates around the drain hole 123, preventing significant impact on the lubrication of the first gear 151. Furthermore, hanging up the end of the handle 113 allows water to automatically drain from the drain hole 123, making drainage more convenient. Additionally, the drain hole 123 is less noticeable after the brush head assembly 200 is installed, resulting in a cleaner product appearance. In other embodiments, the drain hole 123 may not be provided.

[0105] In the embodiment where the second gear 152 is connected to the brush head holder 140 via a transmission connection, by fixing the gear shaft 1521 of the second gear 152 to the brush head holder 140, the brush head holder 140 can be driven to rotate synchronously during the rotation of the second gear 152. Figure 7 and Figure 12As shown, the gear shaft 1521 of the second gear 152 extends from the closed end 132 of the cover 130 into the first receiving space and is connected to the brush head seat 140; it is easy to understand that the closed end 132 of the cover 130 is not completely closed, but has a through hole for the gear shaft 1521 to pass through.

[0106] For further details, please refer to... Figure 7 In the illustrated embodiment, a first bushing 137 is also provided at the through hole position of the closed end 132. The gear shaft 1521 of the second gear 152 extends into the first receiving cavity 131 of the cover 130 through the inner side of the first bushing 137. The first bushing 137 includes an axial section and a radial section connected to each other. The axial section is an annular structure and is used to fit around the outside of the gear shaft 1521 to reduce friction. The radial section is an annular plate structure and is used to hang on the closed end 132 of the cover 130.

[0107] In some embodiments, the gear shaft 1521 of the second gear 152 may be fixedly connected to the brush head holder 140; alternatively, the second gear 152 may be fixedly connected to the gear shaft 1521. For example, in some embodiments, the gear shaft 1521 of the second gear 152 is injection molded integrally with the gear shaft 1521, and then the second gear 152 is installed on the gear shaft 1521; in other embodiments, the second gear 152 and its gear shaft 1521 may be made into an integral structure, and then connected to the brush head holder 140. Those skilled in the art can choose the connection method between the brush head holder 140, the second gear 152, and its gear shaft 1521 according to the ease of assembly.

[0108] In some embodiments, the gear shaft 1521 is further provided with a limiting member 1522, and the limiting member 1522 is located on the side of the second gear 152 away from the cover 130, so as to limit the relative movement of the gear shaft 1521 and the second gear 152 in the axial direction. By providing the limiting member 1522 to limit the axial movement of the second gear 152 on its gear shaft 1521, the first gear 151 and the second gear 152 can be in a better meshing position, thereby making the transmission between the first gear 151 and the second gear 152 smoother and quieter. The limiting member 1522 is a snap ring or a pin.

[0109] exist Figure 7 and Figure 10 In the embodiment shown, the pressure plate 172 is provided with a second bushing 173, and after the pressure plate 172 fixes the second gear 152 to the housing body 120, the end of the gear shaft 1521 of the second gear 152 away from the brush head seat 140 is located inside the second bushing 173.

[0110] In some implementations, such as Figure 4 and Figure 7As shown, the brush head holder 140 includes a bell-shaped structure 142. The bell-shaped structure 142 has a second receiving cavity 141 inside and an opening at its lower end communicating with the second receiving cavity 141. This opening is used to insert the brush head assembly 200 into the second receiving cavity 141. The brush head assembly 200 is not entirely inserted into the second receiving cavity 141, but is partially located within the second receiving cavity 141 to connect with the brush head holder 140. The cleaning section 210 is located outside the second receiving cavity 141 to facilitate cleaning. The lower part of the bell-shaped structure 142 refers to the portion near the cleaning section 210, and the lower end refers to the end near the cleaning section 210. In this embodiment, the brush head assembly 200 can be installed through the opening at the lower end of the second receiving cavity 141, making the process of assembling and disassembling the brush head assembly 200 more convenient. In addition, the installation depth of the brush head assembly 200 can be more reasonable, which can make the size of the head 111 smaller, and can also make the brush head assembly 200 have a better fit with the brush head seat 140 in the circumferential direction when rotating, making the rotation of the brush head more stable, and making the electric brush less vibrating and less noisy when in use.

[0111] Furthermore, in other embodiments, the brush head holder 140 may also be a plate-like structure, which is connected to the gear shaft 1521 of the second gear 152 and also connected to the brush head assembly 200. The brush head holder may also be the gear shaft 1521 of the second gear 152, and the connecting portion 230 in the brush head assembly 200 has a groove for insertion into the gear shaft 1521. After the connecting portion 230 extends into the cover 130, it is inserted into and connected to the gear shaft 1521.

[0112] Furthermore, the brush head holder 140 and the brush head assembly 200 are detachably connected to facilitate replacement of the brush head assembly 200 for different application scenarios. In other embodiments, the brush head holder 140 and the brush head assembly 200 may also be fixedly connected, i.e., the cleaning part 210 of each motorized brush is not replaceable. In other embodiments, the brush head holder 140 may also have other structural shapes, such as a solid cylinder without a second receiving cavity 141 for accommodating the brush head assembly 200.

[0113] In some implementations, such as Figures 13 to 15As shown, the brush head assembly 200 includes a mounting portion 220, a cleaning portion 210 on one side of the mounting portion 220, and a connecting portion 230 on the opposite side. The connecting portion 230 can extend into the second receiving cavity 141 from the opening at the lower end of the second receiving cavity 141 to connect with the brush head base 140. The cleaning portion 210 is the part that directly contacts dirt during the operation of the electric brush; the cleaning portion 210 can be bristles or a brush cloth. The mounting portion 220 is a structure for mounting the cleaning portion 210, and it has a small dimension in the thickness direction. Its specific shape can be a planar plate structure or a shell structure with a spherical surface. The connecting portion 230 is the part for connecting to the brush head base 140; specifically, it can be for directly connecting to the brush head base 140 or for setting a connector for connecting to the brush head base 140. Figure 14 and Figure 15 In the embodiment shown, the side of the mounting portion 220 facing away from the connecting portion 230 is an arc surface that protrudes away from the connecting portion 230; the cleaning portion 210 is a brush bristle, and the brush bristle extends in a direction perpendicular to the arc surface.

[0114] The direction in which the connecting part 230 is inserted into the second receiving cavity 141 from the opening at the lower end of the bell-shaped structure 142 is defined as the insertion direction (i.e., Figure 8 (In the direction indicated by arrow B), the connecting portion 230 and the second receiving cavity 141 both have polygonal cross-sectional profiles perpendicular to the insertion direction, so that the brush head holder 140 can transmit torque to the connecting portion 230 of the brush head assembly 200, causing the brush head holder 140 to drive the brush head assembly 200 to rotate. Specifically, the cross-section can be quadrilateral or hexagonal. Because the connecting portion 230 and the second receiving cavity 141 have polygonal cross-sectional profiles perpendicular to the insertion direction, when the brush head holder 140 and the brush head assembly 200 rotate synchronously, the rotation between the brush head holder 140 and the brush head assembly 200 is more consistent, and the rotation of the brush head assembly 200 is more stable. This reduces the vibration during the use of the electric brush and also prevents the cleaning fluid from splashing during cleaning.

[0115] Furthermore, the second receiving cavity 141 of the bell-shaped structure 142 is provided with a first connector 143, and the connecting portion 230 is provided with a second connector 231. In embodiments where the brush head assembly 200 and the brush head base 140 are detachably connected, the first connector 143 and the second connector 231 can be magnetically connected. Specifically, one of the first connector 143 and the second connector 231 can be a magnet, and the other can be a ferromagnetic structural component; for example, the first connector 143 is a magnet, and the second connector 231 is an iron, cobalt, or nickel structural component; or both the first connector 143 and the second connector 231 can be magnets; or the first connector 143 can be an iron, cobalt, or nickel structural component, and the second connector 231 can be a magnet. Furthermore, the first connector 143 and the bell-shaped structure 142 can be connected by adhesive bonding, interference fit, or injection molding; similarly, the second connector 231 and the connecting portion 230 of the brush head assembly 200 can also be connected by adhesive bonding, interference fit, or injection molding. In other embodiments where 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 can also be connected by snap-fit ​​or plug-in connection.

[0116] In this application, the brush head holder 140 mainly transmits torque to the brush head assembly 200. During the operation of the electric brush, the force exerted on the brush head assembly 200 in the direction of the rotation axis of the brush head holder 140 is also in the direction of the brush head holder 140, so there is no risk that the brush head assembly 200 will detach from the brush head holder 140. Therefore, even if only one of the brush head assembly 200 and the brush head holder 140 is a magnet, the normal operation of the electric brush can be met.

[0117] In the embodiment where the brush head holder 140 and the brush head assembly 200 are connected by magnetic force between the first connector 143 and the second connector 231, the first connector 143 and the second connector 231 can be block-shaped structural components, such as the first connector 143 being a block magnet and the second connector 231 being an iron block; or both can be ring-shaped structural components; or one of them can be a ring-shaped structural component and the other a block-shaped structural component.

[0118] To ensure a more reliable magnetic connection between the brush head holder 140 and the brush head assembly 200, such as... Figure 4 As shown, when the connecting part 230 is connected to the brush head holder 140, one side surface of the first connecting member 143 is arranged opposite to one side surface of the second connecting member 231 so that the magnetic force between the first connecting member 143 and the second connecting member 231 is greater.

[0119] In some implementations, such as Figure 5As shown, when the connecting part 230 is connected to the brush head holder 140, the lower part of the bell-shaped structure 142 contacts the mounting part 220, and the first connecting member 143 and the second connecting member 231 have a gap in the direction of the rotation axis of the brush head holder 140. In this embodiment, when the lower part of the bell-shaped structure 142 contacts the mounting part 220, the movement of the brush head assembly 200 in the direction of the rotation axis of the brush head holder 140 is restricted, and the gap between the first connecting member 143 and the second connecting member 231 in this direction can be maintained. That is, during the process of inserting the brush head assembly 200 into the second receiving cavity 141, the contact between the bell-shaped structure 142 and the mounting part 220 can play a limiting role, preventing the first connecting member 143 and the second connecting member 231 from colliding under the action of magnetic attraction, thereby effectively preventing damage to the magnet.

[0120] Optionally, the connecting portion 230 is a protrusion protruding from the mounting portion 220 in a direction away from the cleaning portion 210. The outer periphery of the protrusion has a polygonal (quadrilateral or hexagonal) cross-sectional shape, and the interior of the protrusion has a recessed groove in the direction towards the cleaning portion 210, into which a magnet is embedded. The second receiving cavity 141 of the brush head holder 140 is provided with a polygonal mounting groove (the shape of the mounting groove matches the shape of the protrusion). Another magnet is disposed in the mounting groove. When the brush head assembly 200 is installed, the protrusion of the connecting portion 230 is embedded in the mounting groove of the brush head holder 140, and the two magnets are magnetically connected. Furthermore, the surface of the magnet inside the protrusion can be located inside the protrusion. When the protrusion is embedded in the mounting groove for magnetic connection, the end of the protrusion contacts the bottom of the mounting groove, and there is a gap between the two magnets.

[0121] For further details, please refer to... Figure 3 and Figure 5The lower end of the bell-shaped structure 142 has an annular plane 144. When the connecting part 230 is connected to the brush head seat 140, the annular plane 144 of the bell-shaped structure 142 forms an annular surface contact with the mounting part 220. During the use of the electric brush, there is an interaction force between the brush head assembly 200 and the brush head seat 140 along the rotation axis of the brush head seat 140. When the annular plane 144 of the bell-shaped structure 142 forms an annular surface contact with the mounting part 220, the force on the mounting part 220 can be more even. When the brush head assembly 200 tends to deflect in any direction due to the force, the brush head seat 140 can provide better support for the mounting part 220 of the brush head assembly 200, making it less likely to deflect relative to the bell-shaped structure 142, thus reducing the possibility of the brush head assembly 200 deflecting after being subjected to force. The deflection of the brush head assembly 200 refers to a situation where the rotation axis of the brush head assembly 200 (such as the rotation axis of the connecting part 230) is not parallel to the rotation axis of the brush head base 140. Under normal operating conditions, since the brush head assembly 200 rotates through the brush head base 140, the rotation axis of the brush head assembly 200 should be parallel to the rotation axis of the brush head base 140.

[0122] In other embodiments, the lower end of the bell-shaped structure 142 may have a plurality of planes spaced apart along the circumference, and when the connecting part 230 is connected to the brush head seat 140, the contact surfaces between the bell-shaped structure 142 and the mounting part 220 are distributed at intervals along the circumference.

[0123] Furthermore, in some embodiments, the lower end of the bell-shaped structure 142 extends from the opening end 133 of the cover 130 away from the second gear 152 into the first receiving cavity 131. When the electric brush is working, the cover 130 does not rotate, while the brush head assembly 200 and the bell-shaped structure 142 of the brush head seat 140 rotate. Therefore, when the lower end of the bell-shaped structure 142 extends from the opening end 133 of the cover 130 into the first receiving cavity 131, by making the brush head assembly 200 contact the bell-shaped structure 142 of the brush head seat 140, a certain gap can be made between the brush head assembly 200 and the cover 130 of the housing body 120, thereby reducing the friction experienced by the brush head assembly 200 during rotation. This makes the rotation of the brush head assembly 200 more stable, with less vibration and less noise when the electric brush is in use. Furthermore, with the axial dimension of the head 111 being relatively small, the axial space of the second receiving cavity 141 of the brush head holder 140 can be increased. After the brush head assembly 200 is installed in the brush head holder 140 of the bell-shaped structure 142, the brush head holder 140 better wraps around the brush head assembly 200 in the circumferential direction. This allows the brush head assembly 200 to have a better fit with the brush head holder 140 in the circumferential direction when rotating, resulting in smoother rotation of the brush head. This also makes the electric brush less vibrating and quieter during use.

[0124] For further details, please refer to... Figure 5 A flange 145 is provided on the lower part of the outer sidewall of the bell-shaped structure 142, and a gap exists between the upper part of the outer sidewall of the bell-shaped structure 142 and the inner sidewall of the cover 130. By providing a flange 145 on the outer sidewall of the bell-shaped structure 142, the location where friction may occur between the bell-shaped structure 142 and the cover 130 is located at the flange 145, rather than the entire outer surface of the bell-shaped structure 142 rubbing against the cover 130. Therefore, even if friction occurs between the bell-shaped structure 142 and the cover 130, the frictional force that needs to be overcome is relatively small, and the cleaning process will not be interrupted. Furthermore... Figure 5 In the embodiment shown, grease can also be provided in the gap between the upper part of the outer sidewall of the bell-shaped structure 142 and the inner sidewall of the cover 130. The grease can seep into the space between the flange 145 and the cover 130, thereby playing a lubricating role to reduce friction. This can make the rotation of the brush head assembly 200 more stable when the electric brush is in use, and reduce vibration and noise.

[0125] In some embodiments, the flange 145 disposed on the outer wall of the bell-shaped structure 142 may be a closed annulus, that is, the flange 145 is closed in the circumferential direction of the bell-shaped structure 142. In other embodiments, the flange 145 may also be a plurality of protrusions disposed circumferentially at intervals on the outer peripheral surface 1523 of the medium-sized structure.

[0126] The electric brush provided in this application embodiment includes a housing, a transmission unit 150, a brush head holder 140, and a brush head assembly 200. The housing has a head 111 and a cover 130 connected to the head 111. The cover 130 has an open end 133 and a closed end 132, and the cover 130 has a first receiving cavity 131 inside. The closed end 132 of the cover 130 is recessed into the interior of the head 111, and the side of the cover 130 is located between the open end 133 and the closed end 132. The transmission unit 150 is disposed inside the head 111. The first gear 151 of the transmission unit 150 is disposed facing the side of the cover 130, and the second gear 152 of the transmission unit 150 is disposed facing the closed end 132 of the cover 130. The first gear 151 and the second gear 152 are bevel gears, and the angle between the rotation axis of the first gear 151 and the rotation axis of the second gear 152 is 10°-80°. The brush head holder 140 is rotatably connected to the cover 130. The brush head holder 140 is located in the first receiving cavity 131 of the cover 130 and is connected to the second gear 152 so as to rotate synchronously with the second gear 152. The brush head holder 140 has a bell-shaped structure. The interior of the bell-shaped structure has a second receiving cavity 141 and an opening at the lower end that communicates with the second receiving cavity 141. A magnet connected to the bell-shaped structure is provided in the second receiving cavity 141. The brush head assembly 200 includes a mounting part 220 and a connecting part 230 and a cleaning part 210 located on both sides of the mounting part 220. By providing different cleaning parts 210 (e.g., brushes of different lengths and sizes, or cloth brushes, etc.) on the mounting part 220, different parts can be cleaned. Another magnet is provided on the connecting part 230. The connecting part 230 of the brush head assembly 200 extends into the second receiving cavity 141 from the opening and is magnetically connected to the magnet in the second receiving cavity 141. In this electric brush, a suitable space is formed between the first gear 151 and the second gear 152. This space is used to install the cover 130 so that the brush head holder 140 can be installed. This makes the structure of the head 111 more compact. The brush head assembly 200 and the bell-shaped structure of the brush head holder 140 are connected by magnetic attraction. The operation of disassembling and assembling the brush head assembly 200 is more convenient, so that the corresponding brush head assembly 200 can be replaced according to different cleaning needs.

[0127] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric brush handle, characterized in that, include: The outer shell has a head and a cover connected to the head, the cover having an open end and a closed end, and the interior of the cover having a first receiving cavity; the closed end of the cover is recessed into the interior of the head, and the side of the cover is located between the open end and the closed end; A transmission unit is disposed within the head, the transmission unit including a first gear and a second gear meshing with the first gear; the first gear is disposed facing the side of the cover, and the second gear is disposed facing the closed end of the cover; A brush head seat is rotatably connected to the cover body. The brush head seat is located in the first receiving cavity of the cover body and connected to the second gear so as to rotate synchronously with the second gear. The brush head seat is used to connect the brush head assembly from one side of the opening end.

2. The electric brush handle according to claim 1, characterized in that, The first gear has a first face facing the cover, and the distance D1 between the first face and the cover is 3-5 mm; the second gear has a second face facing the cover, and the distance D2 between the second face and the cover is 1-3 mm.

3. The electric brush handle according to claim 2, characterized in that, Along the direction from the closed end to the open end, the cover includes a top plate with a through hole and a side plate; the top plate is located at the closed end; the open end is located at the end of the side plate away from the top plate; the side plate is connected to the head, and the top plate is located inside the head; the second surface is recessed in a direction away from the cover; the top plate is located in the recessed area of ​​the second surface.

4. The electric brush handle according to claim 3, characterized in that, The cover also includes a transition section with an increased diameter, and the side plate, the transition section and the top plate are connected in sequence; the side of the cover is located on the side plate and / or the transition section; the first surface is recessed in a direction away from the cover, and the transition section protrudes toward the first surface in the direction of the rotation axis of the first gear.

5. The electric brush handle according to any one of claims 1-4, characterized in that, The outer casing also has a handle and a neck, with the head, the neck and the handle arranged in sequence; the electric brush handle also includes a drive unit and a transmission shaft, the drive unit is disposed in the handle, the transmission shaft is disposed in the neck, and one end of the transmission shaft is connected to the drive unit and the other end is connected to the first gear.

6. The electric brush handle according to claim 5, characterized in that, Both the first gear and the second gear are bevel gears, and the angle between the rotation axis of the first gear and the rotation axis of the second gear is 10°-80°.

7. The electric brush handle according to claim 5, characterized in that, The first gear and the second gear are spur gears or helical gears.

8. The electric brush handle according to claim 5, characterized in that, The ratio of the number of teeth of the second gear to that of the first gear is in the range of 1.5-3.

9. The electric brush handle according to claim 8, characterized in that, The drive unit includes a motor and a reduction gear assembly; the output shaft of the motor is connected to the input shaft of the reduction gear assembly, and the output shaft of the reduction gear assembly is connected to the transmission shaft; the transmission ratio of the reduction gear assembly is in the range of 30-40.

10. The electric brush handle according to any one of claims 1-4, characterized in that, The side of the head away from the opening end is a conical structure, and the outer peripheral surface of the second gear away from the opening end is a conical surface. The distance D3 between the inner conical surface of the conical structure of the head and the conical surface of the second gear is 0.5-2mm.

11. The electric brush handle according to claim 10, characterized in that, The head also includes a cylindrical structure connected to the side of the conical structure near the opening end, the cover is disposed inside the cylindrical structure and connected to the inner side of the cylindrical structure, and the second gear is disposed inside the conical structure.

12. The electric brush handle according to claim 11, characterized in that, The head is provided with a drainage hole, which is located at the connection between the cover and the cylindrical structure, and the drainage hole is located on the side of the connection away from the first gear.

13. The electric brush handle according to any one of claims 1-4, characterized in that, The second gear is connected to a gear shaft, one end of which extends into the closed end of the cover and is connected to the brush head seat.

14. The electric brush handle according to claim 13, characterized in that, The gear shaft is also provided with a limiting member, and the limiting member is located on the side of the second gear away from the cover, so as to restrict the relative movement of the gear shaft and the second gear in the axial direction; the limiting member is a snap ring or a pin.

15. The electric brush handle according to any one of claims 1-4, characterized in that, The brush head holder is used to detachably connect the brush head assembly; the brush head holder includes a bell-shaped structure, the interior of which has a second receiving cavity and the lower end has an opening communicating with the second receiving cavity; the opening is used to insert the brush head assembly into the second receiving cavity.

16. The electric brush handle according to claim 15, characterized in that, The brush head assembly is detachably connected by magnetic attraction. The second receiving cavity is provided with a first connector for connecting to the brush head assembly. The first connector is a magnet or a ferromagnetic structural component.

17. The electric brush handle according to claim 15, characterized in that, The lower part of the outer wall of the bell-shaped structure is provided with a flange, and there is a gap between the upper part of the outer wall of the bell-shaped structure and the inner wall of the cover.

18. The electric brush handle according to claim 15, characterized in that, The lower end of the bell-shaped structure extends from the opening end of the cover away from the first receiving cavity; the lower end of the bell-shaped structure has an annular plane so that when the brush head assembly is connected to the brush head seat, the annular plane forms an annular surface contact with the brush head assembly.

19. An electric brush, characterized in that, The invention includes a brush head assembly and an electric brush handle as described in any one of claims 1-18, wherein the brush head assembly includes a mounting portion and a connecting portion and a cleaning portion located on both sides of the mounting portion, and the connecting portion is connected to the brush head base.

20. The electric brush according to claim 19, characterized in that, The brush head holder includes a bell-shaped structure, the interior of which has a second receiving cavity and the lower part has an opening communicating with the second receiving cavity; a first connecting member is disposed inside the second receiving cavity; The connecting part is provided with a second connector, and the connecting part extends from the opening into the second receiving cavity to connect the first connector and the second connector.

21. The electric brush according to claim 20, characterized in that, One of the first connector and the second connector is a magnet, and the other is a ferromagnetic structural component; or both the first connector and the second connector are magnets.

22. The electric brush according to claim 21, characterized in that, One of the first connector and the second connector is a ring-shaped structural component, and the other is a block-shaped structural component; or, both the first connector and the second connector are block-shaped structural components. When the connecting part is connected to the brush head holder, one side surface of the first connecting member is disposed opposite to one side surface of the second connecting member.

23. The electric brush according to claim 21, characterized in that, The lower part of the bell-shaped structure contacts the mounting part, and the first connector and the second connector have a gap in the direction of the rotation axis of the brush head seat.

24. The electric brush according to claim 20, characterized in that, The direction in which the connecting part inserts into the second receiving cavity from the opening is defined as the insertion direction. The cross-sectional profiles of the connecting part and the second receiving cavity perpendicular to the insertion direction are both polygonal, so that the brush head seat drives the brush head assembly to rotate.

25. The electric brush according to claim 20, characterized in that, The brush head holder and the connecting part are connected by plugging or snapping together through the first connector and the second connector.

26. The electric brush according to any one of claims 19 to 25, characterized in that, The mounting part has an arc-shaped surface that protrudes away from the connecting part on the side opposite to the connecting part; the cleaning part has bristles that extend in a direction perpendicular to the arc-shaped surface.

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