Brush handle shell and electric toothbrush

Abstract

The embodiment of the utility model discloses a brush handle shell and an electric toothbrush, and the brush handle shell comprises an insulating lining and a metal shell arranged on the periphery of the insulating lining in a sleeving manner; the metal shell is provided with a first display window and a first operation window, the insulating lining is provided with a second display window corresponding to the first display window, and the insulating lining is provided with a second operation window corresponding to the first operation window. According to the utility model, the brush handle shell adopts the metal shell, and meanwhile, the metal shell is provided with the display window and the operation window, so that a user can carry out key operation and visual screen display at the same time, and the multifunctional use requirement of the user is met.

Description

Technical Field

[0001] The present application relates to the technical field of electric toothbrushes, and particularly relates to a brush handle housing and an electric toothbrush. Background Art

[0002] With the increasing popularity of the use of electric toothbrushes, users' requirements for the quality of electric toothbrushes are increasing day by day. Currently, the outer shells of electric toothbrushes are usually made of plastic, which is prone to yellowing and bacterial growth after long-term use. Moreover, the current toothbrush outer shells usually adopt a cylindrical surface. For example, the publication number is: CN220001980U, and the patent name is: an oral cleaning appliance with a function of preventing pressure relief. The disclosed toothbrush housing has a regular circular cross-sectional shape, which is not conducive to users' grip and does not conform to the concept of ergonomic design. In the related art, the electric toothbrush adopts a metal outer shell. In this way, it can effectively avoid the yellowing of the brush handle outer shell, is easy to clean, and can effectively reduce bacterial growth. However, currently, the brush handle with a metal outer shell only has a switch button set thereon, which cannot meet the visualization needs of users.

[0003] The above content is only used to assist in understanding the technical solution of the utility model, and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0004] In view of the above problems, the present utility model provides a brush handle housing, aiming to solve the technical problem that the electric toothbrush with a metal outer shell cannot meet the visualization needs of users.

[0005] To achieve the above object, the brush handle housing provided by the present utility model is for an electric toothbrush. The brush handle housing includes an insulating inner lining and a metal outer shell sleeved around the periphery of the insulating inner lining;

[0006] A first display window and a first operation window are opened on the metal outer shell. The insulating inner lining is provided with a second display window corresponding to the first display window and a second operation window corresponding to the first operation window.

[0007] In one embodiment, the metal outer shell is arranged in a cylindrical shape, and the cross-sectional shape of the metal outer shell is non-circular.

[0008] In one embodiment, the metal outer shell includes opposite first side walls and second side walls. The first operation window is opened on the first side wall, and the arc curvature of the outer surface of the first side wall is smaller than the arc curvature of the outer surface of the second side wall.

[0009] In one embodiment, the metal outer shell further includes opposite third side walls and fourth side walls. The first side wall, the third side wall, the second side wall, and the fourth side wall are sequentially connected by arcs to enclose an installation cavity.

[0010] In one embodiment, the curvature of the outer surfaces of the third side wall and the fourth side wall is smaller than the curvature of the outer surface of the second side wall, and larger than the curvature of the outer surface of the first side wall.

[0011] In one embodiment, the metal housing comprises a first side wall, a second side wall, a third side wall and a fourth side wall which are connected in arcs in sequence along the circumference thereof; the first display window and the first operation window are opened on one or both of the first side wall, the second side wall, the third side wall and the fourth side wall;

[0012] The first side wall, the second side wall, the third side wall and the fourth side wall together enclose a mounting cavity, and the arc curvatures of the outer surfaces of the first side wall, the second side wall, the third side wall and the fourth side wall are the same or partially the same or different.

[0013] In one embodiment, at least one of the first side wall, the second side wall, the third side wall, and the fourth side wall is provided with a texture; and / or,

[0014] At least one of the first side wall, the second side wall, the third side wall and the fourth side wall is provided with a water guiding pattern for guiding water from top to bottom.

[0015] In one embodiment, the water-conducting pattern includes a plurality of guide grooves opened on the outer surface of the metal shell, and the plurality of guide grooves are spaced apart and arranged side by side in the up-and-down direction.

[0016] In one embodiment, the guide groove is a spiral groove extending circumferentially around the metal shell from top to bottom.

[0017] In one embodiment, at least one of the first side wall, the second side wall, the third side wall, and the fourth side wall is provided with a gripping groove adapted to fit a finger.

[0018] In one embodiment, the metal shell includes a first side wall and a second side wall that are opposite to each other, the first side wall is provided with the first operation window, and the second side wall is provided with the first display window.

[0019] In one embodiment, the first operating window is in a runway shape or an ellipse shape, and the second operating window is arranged in a shape similar to the first operating window; and / or, the first display window is in a runway shape or an ellipse shape; and / or, the second display window is in a half-runway shape or a half-ellipse shape.

[0020] In one embodiment, a ratio of a width of the first operation window to a width of the first display window is greater than or equal to 1 and less than or equal to 2;

[0021] And / or, a ratio of a length of the first operation window to a length of the first display window is greater than or equal to 1 and less than or equal to 6;

[0022] And / or, the ratio of the area of the first operation window to the area of the first display window is greater than or equal to 1.5 and less than or equal to 6.

[0023] In one embodiment, the inner peripheral wall of the first operation window is located outside the inner peripheral wall of the second operation window, so that part of the insulating lining is exposed in the first operation window to form a mounting step.

[0024] In one embodiment, an operation mounting groove is formed on the outer surface of the insulating lining corresponding to the first operation window. The inner peripheral wall of the operation mounting groove is flush with the inner peripheral wall of the first operation window, and the second operation window is formed on the bottom wall of the operation mounting groove.

[0025] In one embodiment, the inner peripheral wall of the first display window is located outside the inner peripheral wall of the second display window, so that part of the insulating lining is exposed in the first display window to form a fixing step.

[0026] In one embodiment, the outer surface of the insulating lining is concave to form a display mounting groove. The inner peripheral wall of the display mounting groove is flush with the inner peripheral wall of the first display window, and the second display window is formed on the bottom wall of the display mounting groove.

[0027] In one embodiment, the brush handle housing further includes a display panel mounted in the first display window and an operation panel mounted in the first operation window; a first display area is provided on the display panel, and at least one button is provided on the operation panel.

[0028] In one embodiment, a second display area is further provided on the operation panel. The first display area and the second display area are circular, rectangular or elongated along the length direction of the metal shell; and / or, an indicator light transmissive area is provided on the display panel and / or the operation panel.

[0029] In one embodiment, the insulating lining is an insulating layer attached to the inner wall of the metal shell; or, the insulating lining is an insulating inner shell.

[0030] In one embodiment, the thickness of the insulating lining is less than or equal to 5 mm.

[0031] In one embodiment, the brush handle housing further includes at least one guide rail;

[0032] At least one of the guide rails is provided on the inner wall surface of the insulating lining; or,

[0033] The bottom end of the metal housing extends beyond the bottom end of the insulating inner lining to form a mounting section. At least one of the guide rails is provided on the inner wall surface of the mounting section and the inner wall surface of the insulating inner lining; and the guide rails on the mounting section are in one-to-one docking with the guide rails on the insulating inner lining.

[0034] In one embodiment, a self-locking structure for locking with the movement is provided at the top end and / or the bottom end of the guide rail.

[0035] In one embodiment, a first boss is provided at the top of the metal housing, and an outer through hole is formed in the first boss; a second boss adapted to be embedded in the outer through hole is provided at the top of the insulating inner lining, and an inner through hole for the output shaft to extend out is formed in the second boss.

[0036] In one embodiment, the metal housing includes a cylindrical body portion and a necking portion connected between the cylindrical body portion and the first boss. The outer diameter of the necking portion gradually decreases from the cylindrical body portion to the first boss; both the first display window and the first operation window extend upward from the cylindrical body portion to the necking portion.

[0037] The present utility model further provides an electric toothbrush, which includes a movement, a brush head and a brush handle housing as described in any one of the above embodiments. The movement is installed in the inner cavity of the insulating inner lining of the brush handle housing, and the output shaft of the movement extends out of the brush handle housing to be connected with the brush head.

[0038] By adopting the double-shell structure of the insulating inner lining and the metal housing for the brush handle housing of the present utility model, the metal housing can ensure the overall consistency of the entire brush handle housing. Compared with the current plastic housing, it has high structural strength, is not easily damaged, is easier to clean, and is not prone to yellowing, dirt accumulation and other situations. At the same time, it can also improve the texture and feel of the electric toothbrush. On the one hand, the insulating inner lining embedded in the metal housing can provide support for the relatively thin metal housing to prevent the metal housing from deforming due to long-term use or accidental collision; on the other hand, the insulating inner lining can insulate the metal housing from the electrical components inside the brush handle, and the insulating inner lining has lower processing difficulty in setting the connection structure on its inner wall surface compared with the metal housing.

[0039] Precisely because the brush handle housing of this application adopts a double-shell structure of an insulating inner lining and a metal outer shell, which has high structural strength. Therefore, opening the first display window and the first operation window on the metal outer shell simultaneously will not affect the structural strength of the entire brush handle housing. The first display window on the metal outer shell can be used to install a display panel, enabling the electric toothbrush to have a display function and meet the visualization requirements. The first operation window on the metal outer shell can be used to install buttons or an operation panel with buttons, meeting the power-on / off and gear-shifting requirements of the electric toothbrush. In this way, users can perform button operations and visual screen displays simultaneously to meet the multi-functional usage requirements. Moreover, the insulating inner lining and the metal outer shell are correspondingly provided with display windows and operation windows, making the overall thickness of the brush handle housing sufficient to install a display panel in the display window and an operation panel in the operation window, ensuring the installation stability of the display panel and the operation panel without the need to additionally set up connection structures on the insulating inner lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0041] Figure 1 Shows a schematic structural diagram of the first embodiment of the brush handle housing of the present utility model;

[0042] Figure 2 For Figure 1 a schematic structural diagram of the brush handle housing from an angle in

[0043] Figure 3 For Figure 1 a schematic structural diagram of the brush handle housing from another angle in

[0044] Figure 4 For Figure 1 a front view of the brush handle housing in

[0045] Figure 5 For Figure 4 a cross-sectional view along the line V-V in

[0046] Figure 6 For Figure 1 a right view of the brush handle housing in

[0047] Figure 7 For Figure 1 an exploded view of the brush handle housing in

[0048] Figure 8 For Figure 7 a schematic structural diagram of the insulating inner lining from another angle in

[0049] Figure 9 is Figure 1 A cross-sectional view of the brush handle housing at an angle in

[0050] Figure 10 is Figure 9 An enlarged partial view at A in

[0051] Figure 11 is Figure 9 A schematic diagram of the brush handle housing in at another angle;

[0052] Figure 12 is Figure 11 An enlarged partial view at B in ;

[0053] Figure 13 A schematic diagram of the outer contour of an embodiment of the metal housing of the brush handle housing of the present utility model;

[0054] Figure 14 A schematic diagram of the outer contour of another embodiment of the metal housing of the present utility model;

[0055] Figure 15 A schematic diagram of the outer contour of yet another embodiment of the metal housing of the present utility model;

[0056] Figure 16 A schematic diagram of the outer contour of still another embodiment of the metal housing of the present utility model;

[0057] Figure 17 A schematic diagram of the structure of the second embodiment of the brush handle housing of the present utility model;

[0058] Figure 18 A schematic diagram of the structure of the third embodiment of the brush handle housing of the present utility model;

[0059] Figure 19 A schematic diagram of the structure of the fourth embodiment of the brush handle housing of the present utility model;

[0060] Figure 20 A schematic diagram of the partial structure of the fifth embodiment of the brush handle housing of the present utility model;

[0061] Figure 21 A schematic diagram of the partial structure of the sixth embodiment of the brush handle housing of the present utility model;

[0062] Figure 22 A schematic diagram of the partial structure of the seventh embodiment of the brush handle housing of the present utility model;

[0063] Figure 23 A schematic diagram of the partial structure of the eighth embodiment of the brush handle housing of the present utility model;

[0064] Figure 24 A schematic diagram of the partial structure of the ninth embodiment of the brush handle housing of the present utility model;

[0065] Figure 25 It is a partial structural schematic diagram of the tenth embodiment of the brush handle housing of the present utility model;

[0066] Figure 26 It is a partial structural schematic diagram of the eleventh embodiment of the brush handle housing of the present utility model;

[0067] Figure 27 It is a partial structural schematic diagram of the twelfth embodiment of the brush handle housing of the present utility model.

[0068] Explanation of the reference numerals in the drawings:

[0069] Label Name Label Name Label Name 100 Brush handle housing 121 First display window 132 Outer through-hole 110 Insulating lining 122 First operation window 133 Cylindrical part 111 Second display window 123 First side wall 134 Necking part 112 Second operation window 124 Second side wall 140 Display panel 113 Installation step 125 Third side wall 141 First display area 114 Operation installation groove 126 Fourth side wall 142 Indicator light light-transmitting area 115 Fixing step 127 Installation cavity 150 Operation panel 116 Display installation groove 128 Flow guide groove 151 Button 117 Second boss 129 Grip groove 152 Second display area 118 Inner through-hole 130 Installation section 160 Guide rail 120 Metal shell 131 First boss 161 Self-locking structure

[0070] The realization, functional features and advantages of the object of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0071] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0072] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture. If the specific posture changes, then the directional indications will also change accordingly.

[0073] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present utility model, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes the A solution, or the B solution, or the solution where A and B are satisfied simultaneously.

[0074] The present utility model provides a brush handle housing for an electric toothbrush.

[0075] In the embodiment of the present utility model, please refer to Figures 1 to 4 , the brush handle housing 100 includes an insulating inner lining 110 and a metal outer shell 120 sleeved on the periphery of the insulating inner lining 110; a first display window 121 and a first operation window 122 are opened on the metal outer shell 120, and a second display window 111 is opened on the insulating inner lining 110 corresponding to the first display window 121, and a second operation window 112 is opened corresponding to the first operation window 122.

[0076] In this embodiment, the metal outer shell 120 serves as the appearance component of the brush handle of the electric toothbrush and is used to be held by the user. The insulating inner lining 110 provides an installation space and protection for the internal movement structure of the electric toothbrush. The insulating inner lining 110 and the metal outer shell 120 can be fixedly connected by means such as gluing, secondary injection molding, and nano-injection molding, and no specific limitation is made here. The electric toothbrush adopts the metal outer shell 120, which has high structural strength, is not easily damaged, is easy to clean, is not easily yellowed, and can improve the texture and feel of the electric toothbrush. The metal outer shell 120 can specifically adopt lightweight metal materials with better elasticity such as stainless steel, zinc alloy, copper alloy, and titanium alloy. The insulating inner lining 110 can specifically adopt insulating materials such as plastic, other polymer materials, and composite materials. The insulating inner lining 110 can be a shell-like structure or a layered structure attached to the inner wall surface of the metal outer shell 120. The insulating inner lining 110 can insulate the metal outer shell 120 and the internal structure of the movement. Moreover, since the inner wall of the metal is smooth and it is not easy to process the connection structure, it is more convenient to set the connection structure for fixing the movement on the insulating inner lining 110, and the processing cost is low and the precision is easy to control.

[0077] It can be understood that, in order to facilitate the user's grip, the metal outer shell 120 is usually arranged in a cylindrical shape. Then the cross-sectional shape of the metal outer shell 120 can be circular or non-circular, such as a rounded rectangle, a polygon, etc. The cross-sectional shape of the metal outer shell 120 can be designed according to actual use requirements, and no specific limitation is made in this embodiment. And the insulating inner lining 110 is usually arranged in a shape imitating the metal outer shell 120 to be adapted and installed in the metal outer shell 120.

[0078] The first display window 121 on the metal housing 120 is used to install a display module, and the display module is used to display the cleaning mode, battery level, cleaning duration, etc. The first operation window 122 is used to install an operation module, and the operation module is used to control the power on / off of the electric toothbrush or switch the cleaning mode, etc. The first display window 121 and the first operation window 122 can be arranged on the same side wall of the metal housing 120, or can be arranged on different side walls of the metal housing 120. When the first display window 121 and the first operation window 122 are arranged on the same side wall of the metal housing 120, the first display window 121 and the first operation window 122 can be spaced apart from each other, or can be communicated with each other, that is, the display module and the operation module can be spaced apart from each other, or can be integrated into one body. The sizes of the first display window 121 and the first operation window 122 can be designed according to actual needs. For example, the first display window 121 can be made larger than the first operation window 122, or the first display window 121 can be made smaller than the first operation window 122, and no specific limitation is made here. Moreover, the shapes of the first display window 121 and the first operation window 122 can be various, such as circular, rectangular, oval, racetrack-shaped, etc., and no specific limitation is made here either.

[0079] The second display window 111 and the first display window 121 can be arranged in a similar shape, and their shapes can also be different. The second operation window 112 and the first operation window 122 can be arranged in a similar shape, and their shapes can also be different. By opening the second display window 111 and the second operation window 112 on the insulating inner lining 110, the display module can be connected to the movement in the inner cavity of the insulating inner lining 110 through the second display window 111, and the operation module can be connected to the movement through the second operation window 112.

[0080] The brush handle housing 100 of the present utility model adopts a double-layer shell structure of an insulating inner lining 110 and a metal housing 120. The metal housing 120 can ensure the overall consistency of the entire brush handle housing. Compared with the current plastic housing, it has high structural strength, is not easily damaged, is easier to clean, and is not prone to yellowing, dirt accumulation, etc. At the same time, it can also improve the texture and feel of the electric toothbrush. And the insulating inner lining 110 embedded in the metal housing 120 can, on the one hand, provide support for the relatively thin metal housing 120 to prevent the metal housing 120 from deforming due to long-term use or accidental collision; on the other hand, the insulating inner lining 110 can insulate the metal housing 120 from the electrical components inside the brush handle, and the insulating inner lining 110 has lower processing difficulty in setting connection structures on its inner wall surface compared with the metal housing 120.

[0081] Precisely because the brush handle housing 100 of the present application adopts a double-shell structure of an insulating inner lining 110 and a metal outer shell 120, and has high structural strength, opening a first display window 121 and a first operation window 122 on the metal outer shell 120 simultaneously will not affect the structural strength of the entire brush handle housing 100. The first display window 121 on the metal outer shell 120 can be used to install a display panel 140, enabling the electric toothbrush to have a display function and meet the visualization requirements. The first operation window 122 on the metal outer shell 120 can be used to install a key 151 or an operation panel 150 with a key 151 to meet the power-on / off and gear-shifting requirements of the electric toothbrush. In this way, the user can perform key 151 operations and visual screen displays simultaneously to meet the multi-functional usage requirements. Moreover, the insulating inner lining 110 and the metal outer shell 120 are correspondingly provided with display windows and operation windows, so that the overall thickness of the brush handle housing 100 is sufficient to install the display panel 140 in the display window and the operation panel 150 in the operation window, and the installation stability of the display panel 140 and the operation panel 150 can be ensured without additionally setting a connection structure on the insulating inner lining 110.

[0082] In one embodiment, as Figure 5 、 Figure 7 、 Figures 13 to 16 shown, the metal outer shell 120 is provided in a cylindrical shape, and the cross-sectional shape of the metal outer shell 120 is non-circular.

[0083] The metal outer shell 120 provided in a cylindrical shape is more convenient for the user to grip. The length of the metal outer shell 120 can be adjusted according to actual needs and is not specifically limited here. If the cross-sectional shape of the metal outer shell 120 is non-circular, the cross-sectional shape of the metal outer shell 120 can specifically be a rounded triangle, a rounded rectangle, a kidney shape, a drum shape, an oval shape, a racetrack shape, a polygon, a petal shape, etc., and will not be listed one by one here. It can be understood that since the surface of the metal outer shell 120 is smooth, during the use process by the user, cleaning liquid is likely to adhere to the brush handle, resulting in the brush handle being likely to fall off from the user's hand during use, especially in an environment where the toothbrush vibrates, which will exacerbate the phenomenon of the brush handle falling off from the user's hand. By making the cross-sectional shape of the metal outer shell 120 non-circular, the fit between the handle and the user's fingers can be increased, and the brush handle can be prevented from falling off during use.

[0084] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 13 , the metal outer shell 120 includes opposite first side walls 123 and second side walls 124. A first operation window 122 is opened on the first side wall 123, and the arc curvature rate of the outer surface of the first side wall 123 is less than the arc curvature rate of the outer surface of the second side wall 124.

[0085] In this embodiment, it should be noted that the arc curvature of the outer surface refers to the numerical value of the bending degree of the outer surface. The larger the arc curvature, the greater the bending degree of the outer surface; conversely, the smaller the arc curvature, the closer the outer surface is to a plane. The outer surface of the first side wall 123 can be an arc surface, a plane, or a combined surface of a plane and an arc surface; while the outer surface of the second side wall 124 is an arc surface.

[0086] By making the arc curvature of the outer surface of the first side wall 123 smaller than that of the outer surface of the second side wall 124, the outer surface of the first side wall 123 is flatter compared to the outer surface of the second side wall 124. By opening the first operation window 122 on the first side wall 123, that is, the first operation window 122 is opened on the relatively flat wall surface of the metal housing 120. In this way, it is easier for the thumb to touch the pressing control area provided at the first operation window 122. In other words, the pressing contact area between the thumb and the button 151 can be increased, thereby improving the convenience of the user's pressing operation and reducing or avoiding the situation of pressing failure.

[0087] Since during use, the center of the user's palm or the four fingers contact the outer surface of the first side wall 123, and by making the arc curvature of the outer surface of the second side wall 124 larger than that of the outer surface of the first side wall 123, the second side wall 124 can better fit the curvature of the palm center or the four fingers, thereby improving the fit between the metal housing 120 and the palm and further preventing the brush handle from falling off during use. The first display window 121 can be provided on the first side wall 123, the second side wall 124, or the side wall between the first side wall 123 and the second side wall 124, and no specific limitation is made here.

[0088] Furthermore, please refer again to Figure 5 、 Figure 7 、 Figures 13 to 16 , the metal housing 120 further includes a third side wall 125 and a fourth side wall 126 that are oppositely arranged. The first side wall 123, the third side wall 125, the second side wall 124, and the fourth side wall 126 are sequentially connected by arcs to enclose an installation cavity 127.

[0089] In this embodiment, the first side wall 123, the third side wall 125, the second side wall 124, and the fourth side wall 126 are connected by arcs in sequence. That is, the entire metal housing 120 has a smooth transition and there will be no situation of being prickly to the hand. The installation cavity 127 enclosed by the metal housing 120 is used to install the insulating lining 110. Since the entire metal housing 120 is mainly formed by connecting four side walls, the cross-sectional shape of the metal housing 120 is a structure similar to a rounded rectangle. Compared with the structure where the cross-section of the metal housing 120 is circular, the arc-shaped corners of the first side wall 123, the third side wall 125, the second side wall 124, and the fourth side wall 126 enable the other four fingers except the thumb to bend and hold better, thus further avoiding the situation of the brush handle falling off during use.

[0090] Further, as Figure 3 、 Figure 5 、 Figure 7 and Figure 13 shown, the arc curvature of the outer surfaces of the third side wall 125 and the fourth side wall 126 is less than the arc curvature of the outer surface of the second side wall 124 and greater than the arc curvature of the outer surface of the first side wall 123.

[0091] In this embodiment, the arc curvatures of the outer surfaces of the third side wall 125 and the fourth side wall 126 can be the same or different. For the convenience of description, taking the orientation of the brush handle during use as a reference, the first side wall 123 is the front side wall, the second side wall 124 is the rear side wall, and the third side wall 125 and the fourth side wall 126 are the left and right side walls. By making the arc curvature of the outer surfaces of the third side wall 125 and the fourth side wall 126 less than the arc curvature of the outer surface of the second side wall 124 and greater than the arc curvature of the outer surface of the first side wall 123, that is, the side walls on the left and right are more curved than the front side wall and flatter than the rear side wall. On the one hand, it makes the arc curvatures of the left and right side walls different from those of the front and rear side walls, and the arc corners between the four side walls can provide grasping fulcrums for the fingers and palm, thereby enhancing the grasping force of the user on the brush handle; on the other hand, the second side wall 124 on the back is more curved, and the third side wall 125 and the second side wall 124 on the left and right are flatter than the second side wall 124, which is more ergonomic and can further improve the grasping stability of the fingers or palm on the entire metal housing 120; thus, it can effectively avoid the brush handle falling off during use and is more convenient for the user to brush teeth horizontally, can adjust different brushing orientations, and improve the portability of the user's toothbrushing.

[0092] In one embodiment, as Figure 5 、 Figures 13 to 16As shown, the metal housing 120 includes a first side wall 123, a second side wall 124, a third side wall 125, and a fourth side wall 126 that are sequentially arc-connected along its circumference; a first display window 121 and a first operation window 122 are opened on one or both of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126;

[0093] The first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 together enclose an installation cavity 127, and the arc bending rates of the outer surfaces of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 are all the same, partially the same, or all different.

[0094] In this embodiment, the entire metal housing 120 is mainly formed by connecting four side walls, so the cross-sectional shape of the metal housing 120 is a structure similar to a rounded rectangle. Compared with the structure where the cross-section of the metal housing 120 is circular, the arc corners of the first side wall 123, the third side wall 125, the second side wall 124, and the fourth side wall 126 can provide a grasping fulcrum for the fingers or palm, enabling the fingers or palm to hold the brush handle more stably, thereby further avoiding the situation of the brush handle falling off during use. The first display window 121 and the first operation window 122 can be opened on one or both of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 according to actual usage requirements.

[0095] The installation cavity 127 formed by the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 together is used to install the insulating lining 110. The magnitudes of the arc bending rates of the outer surfaces of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 can be designed according to actual needs. For example, the cross-section of the metal housing 120 can be designed into the structure as shown in Figure 5 、 Figures 13 to 16 Of course, by adjusting the arc bending rate of one or more of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126, the metal housing 120 can also be set to other shapes other than those shown in Figure 5 、 Figures 13 to 16 Shown, and no further enumeration will be made here.

[0096] In one embodiment, please refer to Figure 17At least one of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 is provided with a texture. The texture may have many structures, for example, a checkered pattern, a diamond pattern, a horizontal pattern, a vertical pattern, a cross pattern, a water wave pattern, etc. may be provided on the metal shell 120. A specific texture structure may be designed according to requirements, and the texture structure is not specifically limited here. By providing a texture on at least one of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126, the grip friction may be increased, and the brush handle may be further prevented from falling off.

[0097] In one embodiment, please refer to Figure 18 At least one of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 is provided with a water-guiding pattern for guiding water from top to bottom. The water-guiding pattern may have many structures, such as a vertical guide groove 128 or an oblique guide groove 128. As long as the water can be guided from top to bottom, the specific structure of the water-guiding pattern is not limited here. By providing a water-guiding pattern on at least one of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126, water can be guided downward when brushing teeth, keeping the surface of the metal shell 120 as dry as possible, and reducing the risk of accidental falling off of the brush handle.

[0098] Furthermore, the water-guiding pattern includes a plurality of guide grooves 128 provided on the outer surface of the metal shell 120, and the plurality of guide grooves 128 are spaced apart and arranged side by side in the up-down direction. The guide groove 128 specifically extends obliquely from top to bottom, so that the uncomfortable feeling caused by the plurality of guide grooves 128 can be weakened. The provision of a plurality of guide grooves 128 can further enhance the water-guiding effect, so that the surface of the metal shell 120 in contact with the hand is as dry as possible, so as to enhance the grip stability of the brush handle. The number of guide grooves 128 can be selected and designed according to actual needs, and is not specifically limited here. The guide groove 128 can be a corrugated groove or a spiral groove.

[0099] Furthermore, the guide groove 128 is a spiral groove extending from top to bottom around the metal shell 120. In this way, the water at the top of the metal shell 120 can be guided to the bottom through the guide groove 128, thereby improving the diversion effect. In addition, the spiral groove has a special aesthetic feeling, which can improve the appearance competitiveness of the product.

[0100] In one embodiment, if Figure 19As shown, at least one of the first side wall 123, the second side wall 124, the third side wall 125, and the fourth side wall 126 is provided with a holding groove 129 adapted to the fingers. The holding groove 129 can provide indication and guidance for a child to hold the electric toothbrush, and thus it is more convenient for the child to correctly hold the electric toothbrush. The specific size of the holding groove 129 can be reasonably designed according to the size of the human finger and will not be specifically limited herein. The holding groove 129 can be four grooves matching the four fingers except the thumb, or a whole groove or other forms, which will not be specifically limited herein.

[0101] In one embodiment, as Figures 1 to 4 , Figures 6 to 12 shown, the metal housing 120 includes a first side wall 123 and a second side wall 124 arranged opposite to each other. A first operation window 122 is formed on the first side wall 123, and a first display window 121 is formed on the second side wall 124.

[0102] In this way, the first operation window 122 and the first display window 121 are formed on two opposite side walls of the metal housing 120. Generally, if the wall surface where the first operation window 122 is installed is the front surface, then the first display window 121 is arranged on the back surface of the brush handle. In this embodiment, the first operation window 122 and the first display window 121 are formed on two opposite side walls of the metal housing 120. Compared with the case where the first operation window 122 and the first display window 121 are formed on the same side wall of the metal housing 120, the structural strength of the front surface of the brush handle housing 100 can be improved, and the front appearance of the brush handle housing 100 can be made more simple and beautiful. And compared with the case where the first display window 121 is formed on the left and right side walls of the metal housing 120, it is more convenient to connect and wire with the internal movement structure.

[0103] In a specific embodiment, please refer to Figures 1 to 4 , Figures 7 to 12 , the first operation window 122 is in a runway shape or an oval shape, and the second operation window 112 is arranged in a shape similar to that of the first operation window 122; and / or, the first display window 121 is in a runway shape or an oval shape; and / or, the second display window 111 is in a semi-runway shape or a semi-oval shape. The first operation window 122 and the first display window 121 being in a runway shape or an oval shape can better adapt to the length dimension of the brush handle housing 100, making the appearance of the entire brush handle housing 100 more simple and beautiful. The second operation window 112 being arranged in a shape similar to that of the first operation window 122 is more convenient for installing structures such as the operation panel 150. If the second display window 111 is in a semi-runway shape or a semi-oval shape, the insulating lining 110 can be provided with structures such as fixing posts at the position corresponding to the other half of the first display window 121 except the second display window 111, and the fixing posts can be used to fix the display panel 140.

[0104] In one embodiment, please refer to againFigures 1 to 4 , Figures 7 to 12 , the ratio of the width of the first operation window 122 to the width of the first display window 121 is greater than or equal to 1 and less than or equal to 2;

[0105] and / or, the ratio of the length of the first operation window 122 to the length of the first display window 121 is greater than or equal to 1 and less than or equal to 6;

[0106] and / or, the ratio of the area of the first operation window 122 to the area of the first display window 121 is greater than or equal to 1.5 and less than or equal to 6.

[0107] In this embodiment, the ratio of the width of the first operation window 122 to the width of the first display window 121 can specifically be 1, 1.3, 1.5, 1.8, 2, etc. The ratio of the length of the first operation window 122 to the length of the first display window 121 can specifically be 1, 2, 2.5, 3, 3.8, 4, 4.6, 5.5, 6, etc. The ratio of the area of the first operation window 122 to the area of the first display window 121 can specifically be 1.5, 1.8, 2, 2.5, 3, 3.8, 4, 4.6, 5.5, 6, etc.

[0108] By making the ratio of the width of the first operation window 122 to the width of the first display window 121 greater than or equal to 1 and less than or equal to 2, the width of the first display window 121 is less than the width of the first operation window 122. Thus, the width dimension of the first display window 121 is designed more reasonably, and while it can effectively display the brushing information, it does not occupy too much space.

[0109] By making the ratio of the length of the second operation window 112 to the length of the second display window 111 greater than or equal to 1 and less than or equal to 6, the length of the first display window 121 is less than the length of the first operation window 122. Thus, the length dimension of the first display window 121 is designed more reasonably, and while it can effectively display the brushing information, it does not occupy too much space. And the size of the first operation window 122 is designed larger, which is more convenient for the user to press and operate.

[0110] By making the ratio of the area of the first operation window 122 to the area of the first display window 121 greater than or equal to 1.5 and less than or equal to 6. Thus, the area of the first display window 121 is designed more reasonably, and while it can effectively display the brushing information, it does not occupy too much space. And the size of the first operation window 122 is designed larger, which can provide a larger pressing control area, thus being more convenient for the user to press and control.

[0111] In one embodiment, such as Figure 1 , Figure 2 , Figure 4 ,Figures 9 to 12 As shown, the inner peripheral wall of the first operation window 122 is located outside the inner peripheral wall of the second operation window 112, and a part of the insulating lining 110 is exposed in the first operation window 122 to form a mounting step 113.

[0112] In this embodiment, the area of the first operation window 122 is larger than the area of the second operation window 112. Since a part of the insulating lining 110 is exposed in the first operation window 122 to form an annular mounting step 113, it is more convenient to snap-connect with the operation panel 150. In this way, there is no need to additionally provide a connection structure on the insulating lining 110 for connecting the operation panel 150, which can simplify the structure of the insulating lining 110.

[0113] In other embodiments, a connection structure can also be provided at other positions to connect the operation panel 150.

[0114] Furthermore, an operation mounting groove 114 is formed on the outer surface of the insulating lining 110 corresponding to the first operation window 122. The inner peripheral wall of the operation mounting groove 114 is flush with the inner peripheral wall of the first operation window 122, and a second operation window 112 is provided on the bottom wall of the operation mounting groove 114.

[0115] In this embodiment, the operation mounting groove 114 is specifically formed by inwardly recessing the outer surface of the insulating lining 110. In this way, the insulating lining 110 does not need to have a large thickness to provide enough space for the operation mounting groove 114. Since the inner peripheral wall of the operation mounting groove 114 is flush with the inner peripheral wall of the first operation window 122, the inner peripheral wall of the operation mounting groove 114 can also provide support and connection for the operation panel 150, which can further increase the assembly area between the operation panel 150 and the brush handle housing 100 and improve the installation stability of the operation panel 150.

[0116] In one embodiment, as Figure 3 、 Figures 8 to 12 shown, the inner peripheral wall of the first display window 121 is located outside the inner peripheral wall of the second display window 111, and a part of the insulating lining 110 is exposed in the first display window 121 to form a fixing step 115.

[0117] In this embodiment, the area of the first display window 121 is larger than the area of the second display window 111. Since a part of the insulating lining 110 is exposed in the first display window 121 to form a fixing step 115, it is more convenient to snap-connect with the display panel 140. In this way, there is no need to additionally provide a connection structure on the insulating lining 110 for connecting the display panel 140, which can simplify the structure of the insulating lining 110.

[0118] Further, the outer surface of the insulating inner lining 110 is concave to form a display mounting groove 116. The inner peripheral wall of the display mounting groove 116 is flush with the inner peripheral wall of the first display window 121. A second display window 111 is formed in the bottom wall of the display mounting groove 116.

[0119] In this embodiment, the display mounting groove 116 is formed by the concave outer surface of the insulating inner lining 110. Then, the insulating inner lining 110 does not need to be provided with a large thickness to provide sufficient space for setting the display mounting groove 116. The inner peripheral wall of the display mounting groove 116 is flush with the inner peripheral wall of the first display window 121. Then, the inner peripheral wall of the display mounting groove 116 can also provide support and connection for the display panel 140, which can further increase the assembly area between the display panel 140 and the brush handle housing 100 and improve the mounting stability of the display panel 140.

[0120] In one embodiment, as Figures 20 to 25 shown, the brush handle housing 100 further includes a display panel 140 mounted on the first display window 121 and an operation panel 150 mounted on the first operation window 122; a first display area 141 is provided on the display panel 140, and at least one button 151 is provided on the operation panel 150.

[0121] In this embodiment, by mounting the display panel 140 on the first display window 121, the display panel 140 can display the cleaning mode, battery power, cleaning duration, etc. through the first display area 141, thereby making the cleaning state of the electric toothbrush visible and improving the user experience. The operation panel 150 is arranged on the first operation window 122, and at least one button 151 is arranged on the operation panel 150. Then, the on / off and cleaning mode switching of the electric toothbrush can be realized through the button 151.

[0122] Further, a second display area 152 is also provided on the operation panel 150. The first display area 141 and the second display area 152 are circular, rectangular or extend in a circular or rectangular shape along the length direction of the metal housing 120; and / or, an indicator light transmissive area 142 is provided on the display panel 140 and / or the operation panel 150.

[0123] In this embodiment, the second display area 152 of the operation panel 150 can also display the cleaning mode, battery power, cleaning duration, etc. The information displayed in the second display area 152 can be the same as or different from that in the first display area 141. By setting the second display area 152 on the operation panel 150, in this way, the entire brush handle housing 100 has two display areas, and users can observe different display areas according to their needs, improving the usage effect of the product. An indicator light transmissive area 142 is provided on the display panel 140 and / or the operation panel 150, enabling more intuitive observation of the indicator light. The shapes of the first display area 141 and the second display area 152 can be the same or different, and both shapes can be circular, rectangular, strip-shaped, etc.

[0124] In one embodiment, the insulating lining 110 is an insulating layer attached to the inner wall of the metal shell 120; or, the insulating lining 110 is an insulating inner shell.

[0125] When the insulating lining 110 is an insulating layer attached to the inner wall of the metal shell 120, the thickness of the insulating lining 110 is relatively thin, so that the inner cavity space of the insulating lining 110 can be maximized and the weight can be reduced. When the insulating lining 110 is an insulating inner shell, the structural strength of the insulating lining 110 is relatively high, thereby improving the connection stability and reliability between the insulating lining 110 and internal structures such as the internal movement, and ensuring the durability of the entire brush handle housing 100.

[0126] Specifically, the thickness of the insulating lining 110 is less than or equal to 5 mm. In this way, while meeting the structural strength requirements, the insulating lining 110 has sufficient installation space and can reduce the weight of the whole machine.

[0127] In one embodiment, please refer to Figure 5 , Figure 7 , Figures 9 to 12 , Figure 26 and Figure 27 , the brush handle housing 100 further includes at least one guide rail 160;

[0128] At least one guide rail 160 is provided on the inner wall surface of the insulating lining 110; or,

[0129] The bottom end of the metal shell 120 extends beyond the bottom end of the insulating lining 110 to form an installation section 130, and at least one guide rail 160 is provided on the inner wall surface of the installation section 130 and the inner wall surface of the insulating lining 110; and the guide rails 160 on the installation section 130 are in one-to-one docking with the guide rails 160 on the insulating lining 110.

[0130] In this embodiment, one or two opposite guide rails 160 may be provided on the inner wall surface of the insulating liner 110. The guide rail 160 extends along the length direction of the insulating liner 110. By providing the guide rail 160 on the insulating liner 110, it is more convenient for the movement of the electric toothbrush to be assembled in the insulating liner 110 along the guide rail 160. The guide rail 160 may be a guide convex strip or a slide groove. Specifically, the guide rail 160 is composed of two convex strips extending along the length direction of the insulating liner 110, and the two convex strips are arranged at intervals to form a guide groove.

[0131] The bottom end of the metal shell 120 extends beyond the bottom end of the insulating liner 110 to form a mounting section 130, and the mounting section 130 can be used to mount the bottom cover of the brush handle. By providing a guide rail 160 on the metal shell 120 that is connected to the insulating liner 110, the assembly reliability of the core in the brush handle housing 100 can be further improved.

[0132] In one embodiment, if Figure 27 As shown, the top and / or bottom of the guide rail 160 is provided with a self-locking structure 161 for locking with the movement. In this way, after the movement is installed in place along the guide rail 160 on the insulating liner 110, the self-locking structure 161 can cooperate with the locking structure on the movement to achieve locking of the movement and the brush handle housing 100. The specific structure of the self-locking structure 161 can be many, and can be adjusted according to the adaptability of the locking structure on the movement, and is not specifically limited here.

[0133] In one embodiment, please refer to Figures 2 to 12 A first boss 131 is provided on the top of the metal shell 120, and an outer through hole 132 is formed on the first boss 131; a second boss 117 adapted to be embedded in the outer through hole 132 is provided on the top of the insulating liner 110, and an inner through hole 118 is formed on the second boss 117 for the output shaft to extend out.

[0134] In this embodiment, the first boss 131 is provided on the metal shell 120, and the second boss 117 embedded in the first boss 131 is provided on the top of the insulating liner 110, so that the fit between the handle housing 100 and the toothbrush rod can be improved. The first boss 131 can be sleeved or plugged with the end of the toothbrush rod to prevent water leakage, thereby improving the sealing reliability between the handle and the toothbrush rod.

[0135] Furthermore, the metal shell 120 includes a cylindrical portion 133 and a neck portion 134 connected between the cylindrical portion 133 and the first boss 131 , and the outer diameter of the neck portion 134 gradually decreases from the cylindrical portion 133 to the first boss 131 ; the first display window 121 and the first operating window 122 both extend upward from the cylindrical portion 133 to the neck portion 134 .

[0136] In this embodiment, by providing the necking portion 134, the necking of the barrel portion 133 to the first boss 131 is achieved, which can minimize the top opening of the metal housing 120. There is no need to additionally provide an end cap to block the upper open end of the metal housing 120, thus avoiding water ingress and bacterial growth at the connection between the end cap and the metal housing 120 due to the overly large upper opening of the metal housing 120. The first display window 121 and the first operation window 122 both extend upward from the barrel portion 133 to the necking portion 134. By fully utilizing the necking portion 134 to provide the first display window 121 and the first operation window 122, the display window and the operation window are more convenient for users to observe and operate, and at the same time, the overall consistency of the product appearance can be improved.

[0137] The present utility model further provides an electric toothbrush, which includes a movement, a brush head, and a brush handle housing 100. The specific structure of the brush handle housing 100 refers to the above embodiment. The movement is installed in the inner cavity of the insulating lining 110 of the brush handle housing 100, and the output shaft of the movement extends out of the brush handle housing 100 to be connected to the brush head. Since this electric toothbrush adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. The specific structure of the brush head, the specific structure of the movement, and the connection manner between the output shaft of the movement and the toothbrush can refer to the existing designs and will not be elaborated here.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A brush handle housing for an electric toothbrush, characterized in that, The brush handle housing comprises an insulating lining and a metal shell sleeved on the outer periphery of the insulating lining; The metal shell is provided with a first display window and a first operation window, the insulating lining is provided with a second display window corresponding to the first display window, and a second operation window corresponding to the first operation window.

2. The brush handle housing according to claim 1, characterized in that, The metal shell is arranged in a cylindrical shape, and the cross-section shape of the metal shell is non-circular.

3. The brush handle housing according to claim 2, characterized in that The metal shell includes a first side wall and a second side wall opposite to each other. The first side wall is provided with the first operating window. The arc curvature of the outer surface of the first side wall is smaller than the arc curvature of the outer surface of the second side wall.

4. The brush handle housing according to claim 3, wherein, The metal housing further comprises a third side wall and a fourth side wall which are arranged opposite to each other. The first side wall, the third side wall, the second side wall and the fourth side wall are connected in arcs in sequence to enclose a mounting cavity.

5. The brush handle housing according to claim 4, characterized in that The curvature of the outer surfaces of the third side wall and the fourth side wall is smaller than the curvature of the outer surface of the second side wall, and larger than the curvature of the outer surface of the first side wall.

6. The brush handle housing according to claim 2, characterized in that, The metal shell comprises a first side wall, a second side wall, a third side wall and a fourth side wall which are connected in arcs in sequence along the circumference thereof; the first display window and the first operation window are opened on one or both of the first side wall, the second side wall, the third side wall and the fourth side wall; The first side wall, the second side wall, the third side wall and the fourth side wall together enclose a mounting cavity, and the arc curvatures of the outer surfaces of the first side wall, the second side wall, the third side wall and the fourth side wall are the same or partially the same or different.

7. The brush handle housing according to any one of claims 4-6, characterized in that, At least one of the first side wall, the second side wall, the third side wall, and the fourth side wall is provided with a texture; and / or, At least one of the first side wall, the second side wall, the third side wall and the fourth side wall is provided with a water guiding pattern for guiding water from top to bottom.

8. The brush handle housing according to claim 7, characterized in that, The water-conducting pattern includes a plurality of guide grooves opened on the outer surface of the metal shell, and the plurality of guide grooves are spaced apart and arranged side by side in the up-and-down direction.

9. The brush handle housing according to claim 8, characterized in that, The guide groove is a spiral groove extending circumferentially around the metal shell from top to bottom.

10. The brush handle housing according to any one of claims 4-6, characterized in that, At least one of the first side wall, the second side wall, the third side wall and the fourth side wall is provided with a gripping groove adapted to fit a finger.

11. The brush handle housing according to claim 1, characterized in that, The metal shell includes a first side wall and a second side wall that are opposite to each other. The first side wall is provided with the first operating window, and the second side wall is provided with the first display window.

12. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, The first operating window is in a runway shape or an ellipse shape, and the second operating window is arranged in a shape similar to the first operating window; and / or the first display window is in a runway shape or an ellipse shape; and / or the second display window is in a half-runway shape or a half-ellipse shape.

13. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, A ratio of a width of the first operation window to a width of the first display window is greater than or equal to 1 and less than or equal to 2; And / or, a ratio of a length of the first operation window to a length of the first display window is greater than or equal to 1 and less than or equal to 6; And / or, a ratio of an area of ​​the first operation window to an area of ​​the first display window is greater than or equal to 1.5 and less than or equal to 6.

14. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, The inner peripheral wall of the first operation window is located on the periphery of the inner peripheral wall of the second operation window, so that the insulating lining part is exposed in the first operation window to form a mounting step.

15. The brush handle housing according to claim 14, characterized in that, An operation mounting groove is formed in the outer surface of the insulating lining corresponding to the first operation window. The inner peripheral wall of the operation mounting groove is flush with the inner peripheral wall of the first operation window, and the second operation window is formed in the bottom wall of the operation mounting groove.

16. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, The inner peripheral wall of the first display window is located on the periphery of the inner peripheral wall of the second display window, so that the insulating lining part is exposed in the first display window to form a fixing step.

17. The brush handle housing according to claim 16, characterized in that, The outer surface of the insulating lining is recessed to form a display mounting groove. The inner peripheral wall of the display mounting groove is flush with the inner peripheral wall of the first display window, and the second display window is formed in the bottom wall of the display mounting groove.

18. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, The brush handle housing further includes a display panel mounted in the first display window and an operation panel mounted in the first operation window; a first display area is provided on the display panel, and at least one key is provided on the operation panel.

19. The brush handle housing according to claim 18, wherein, A second display area is further provided on the operation panel. The first display area and the second display area are circular, rectangular or elongated along the length direction of the metal housing; and / or, an indicator light light-transmitting area is provided on the display panel and / or the operation panel.

20. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, The insulating lining is an insulating layer attached to the inner wall of the metal housing; or, the insulating lining is an insulating inner shell.

21. The brush handle housing according to claim 20, wherein, The thickness of the insulating lining is less than or equal to 5 mm.

22. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, The brush handle housing further includes at least one guide rail; At least one of the guide rails is provided on the inner wall surface of the insulating lining; or, The bottom end of the metal housing extends beyond the bottom end of the insulating lining to form a mounting section. At least one of the guide rails is provided on the inner wall surface of the mounting section and the inner wall surface of the insulating lining; and the guide rails on the mounting section are in one-to-one docking with the guide rails on the insulating lining.

23. The brush handle housing according to claim 22, wherein, A self-locking structure for locking with the movement is provided at the top end and / or the bottom end of the guide rail.

24. The brush handle housing according to any one of claims 1-6 and 11, characterized in that, A first boss is provided at the top of the metal housing, and an outer through hole is formed in the first boss; a second boss adapted to be embedded in the outer through hole is provided at the top of the insulating lining, and an inner through hole for the output shaft to extend out is formed in the second boss.

25. The brush handle housing according to claim 24, characterized in that, The metal housing includes a cylindrical part and a necking part connected between the cylindrical part and the first boss. The outer diameter of the necking part gradually decreases from the cylindrical part to the first boss; both the first display window and the first operation window extend upward from the cylindrical part to the necking part.

26. An electric toothbrush, characterized in that, It includes a movement, a brush head and a brush handle housing according to any one of claims 1 to 25. The movement is installed in the inner cavity of the insulating lining of the brush handle housing, and the output shaft of the movement extends out of the brush handle housing to be connected with the brush head.

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