Electric toothbrush head and electric toothbrush

Abstract

The embodiment of the utility model provides an electric toothbrush head and an electric toothbrush. The electric toothbrush head comprises a brush body, a rod body, a connecting piece and a sealing structure. And bristles are arranged on the brush body. The rod body comprises a first end and a second end which are opposite, the second end of the rod body is connected with the brush body, and the rod body is provided with a containing cavity penetrating through the first end of the rod body. The connecting piece is installed in the containing cavity. The sealing structure is connected with the rod body and at least used for sealing a gap between the inner side of the side wall of the rod body and the connecting piece. According to the electric toothbrush, the sealing structure can prevent the liquid from entering the containing cavity through the gap between the inner side of the side wall of the rod body and the connecting piece, so that the liquid can be prevented from being accumulated in the containing cavity, the weight of the electric toothbrush head can be prevented from being increased, the vibration amplitude of the electric toothbrush head is guaranteed, and the cleaning effect of the electric toothbrush is improved.

Description

Technical Field

[0001] The present application relates to the technical field of oral care, and in particular to an electric toothbrush head and an electric toothbrush. Background Art

[0002] As people's living standards improve, they pay more and more attention to oral health. Compared with traditional manual toothbrushes, electric toothbrushes have significant advantages in cleaning efficiency, ease of use and comfort, so they are becoming more and more popular among the public, and the functions and appearance designs of electric toothbrushes are constantly enriched.

[0003] Usually, an electric toothbrush includes a body and an electric toothbrush head. The body includes a brush handle and a motor installed in the brush handle. The electric toothbrush head includes a rod body and a connecting piece installed in the rod body. The output shaft of the motor is connected to the connecting piece. The motor drives the rod body to vibrate to drive the brush body connected to the rod body to vibrate, and then drives the bristles to vibrate to the part to be cleaned in the oral cavity. Since the electric toothbrush head is an external part of the electric toothbrush and does not affect the corrosion of the body, there is basically no liquid-proof design for the electric toothbrush head at present. However, once the liquid enters the interior of the electric toothbrush head and forms an accumulation, on the one hand, it will increase the weight of the electric toothbrush head, reduce the amplitude of the vibration of the electric toothbrush head, and affect the cleaning effect of the electric toothbrush; on the other hand, the liquid will corrode the interior of the electric toothbrush head and affect the service life of the electric toothbrush head; on the other hand, the liquid will also cause bacteria to grow inside the electric toothbrush head, which will seriously affect oral health. Utility Model Content

[0004] In view of the above problems, the present application provides an electric toothbrush head and an electric toothbrush, which can avoid the problem of liquid accumulation inside the electric toothbrush head.

[0005] The electric toothbrush head of the embodiment of the present application comprises a brush body, a rod body, a connecting piece and a sealing structure. The brush body is provided with bristles. The rod body comprises a first end and a second end opposite to each other, the second end of the rod body is connected to the brush body, and the rod body is provided with a receiving cavity penetrating the first end of the rod body. The connecting piece is installed in the receiving cavity. The sealing structure is connected to the rod body, and the sealing structure is at least used to seal the gap between the inner side of the side wall of the rod body and the connecting piece.

[0006] In the electric toothbrush head of the embodiment of the present application, the sealing structure is connected to the rod body, and the sealing structure is at least used to seal the gap between the inner side of the side wall of the rod body and the connecting piece, thereby preventing liquid from entering the accommodating chamber through the gap between the inner side of the side wall of the rod body and the connecting piece, thereby preventing liquid from accumulating in the accommodating chamber. On the one hand, it can prevent the weight of the electric toothbrush head from increasing, ensure the amplitude of the vibration of the electric toothbrush head, and improve the cleaning effect of the electric toothbrush; on the other hand, it can prevent the inside of the rod body from being corroded by liquid, thereby extending the service life of the electric toothbrush head; on the other hand, it can prevent liquid from accumulating inside the accommodating chamber and breeding bacteria, thereby ensuring oral health.

[0007] In some embodiments, the rod body is provided with a through hole penetrating through a side wall of the rod body, the through hole is communicated with the accommodating cavity, the sealing structure includes a first sealing member, and the through hole is used to form the first sealing member.

[0008] In some embodiments, the side wall of the rod body includes a side wall body and a guide portion, the guide portion is arranged on the side wall body and protrudes and extends toward the center of the accommodating cavity relative to the side wall body, and the through hole passes through the side wall body and the guide portion; the guide portion is at least one block-shaped protrusion.

[0009] Among them, the setting of the guide part can make the flow rate of the first seal entering the accommodating chamber through the perforation relatively slow, thereby improving the orderliness of the flow of the first seal, thereby on the one hand improving the sealing effect of the first seal; on the other hand, it can reduce the usage of the first seal, thereby reducing the production cost of the electric toothbrush head.

[0010] In some embodiments, the side wall of the rod body includes a side wall body and a guide portion, the guide portion is arranged on the side wall body and protrudes and extends toward the center of the accommodating cavity relative to the side wall body, and the through hole passes through the side wall body and the guide portion; the guide portion is an annular protrusion.

[0011] In some embodiments, the first seal is filled between the perforation and the second end of the rod body. Thus, in the length direction of the rod body, the portion of the rod body from the perforation to the second end of the rod body is a solid structure, which can further reduce the possibility that the flow range of the liquid flowing into the accommodating cavity exceeds the space between the first end of the rod body and the first seal, improve the sealing effect of the first seal, and prevent the liquid from accumulating in the accommodating cavity. On the one hand, it can prevent the weight of the electric toothbrush head from increasing, ensure the amplitude of the vibration of the electric toothbrush head, and improve the cleaning effect of the electric toothbrush; on the other hand, it can prevent the inside of the rod body from being corroded by liquid, and extend the service life of the electric toothbrush head; on the other hand, it can prevent the accumulation of liquid in the accommodating cavity and breed bacteria, and ensure oral health.

[0012] In some embodiments, the connecting member includes a relative top and bottom, and is provided with an installation cavity passing through the bottom and a through hole connected to the installation cavity; the first sealing member divides the accommodating cavity into a first cavity and a second cavity that are not connected, and in the length direction of the rod body, the second cavity is closer to the brush body than the first cavity, and the through hole is located in the first cavity.

[0013] In this way, when liquid enters the accommodating chamber through the through hole, the liquid can only be located in the first chamber, so that the liquid entering the accommodating chamber cannot form accumulation. On the one hand, it can prevent the weight of the electric toothbrush head from increasing, ensure the amplitude of the vibration of the electric toothbrush head, and improve the cleaning effect of the electric toothbrush; on the other hand, it can prevent the inside of the rod body from being corroded by liquid, thereby extending the service life of the electric toothbrush head; on the other hand, it can prevent the accumulation of liquid inside the accommodating chamber and the breeding of bacteria, thereby ensuring oral health.

[0014] In certain embodiments, the first sealing member matches the shape of the flow surface of the accommodating chamber to divide the accommodating chamber into the first chamber and the second chamber which are not connected, and the connecting member is located in the first chamber.

[0015] In some embodiments, the connecting piece further comprises a side portion connecting the top portion and the bottom portion, and the through hole is arranged at the top portion and / or the side portion. This can improve the applicability of the connecting piece, that is, under the premise of ensuring the waterproofness of the electric toothbrush head, the connecting piece with the through hole arranged at the top portion and / or the side portion can be used in conjunction with the rod body.

[0016] In some embodiments, in the length direction of the rod body, the through hole is flush with the top at the lowest point on the inner side of the side wall of the rod body. In this way, when the first seal flows into the accommodating cavity through the through hole, the first seal can be directly arranged on the top, thereby ensuring the sealing effect of the first seal while reducing the amount of the first seal and reducing the production cost of the electric toothbrush head.

[0017] In some embodiments, the connecting member also includes a side connecting the top and the bottom, the through hole is arranged on the side, the first sealing member is sleeved on the side of the connecting member, and together with the connecting member divides the accommodating cavity into the first cavity and the second cavity which are not connected.

[0018] In some embodiments, when the through hole is disposed on the side of the connector, the number of the through holes includes two, and the two through holes penetrate in one direction, so as to facilitate the processing and manufacturing of the connector and facilitate the positioning and molding process of the connector itself.

[0019] In some embodiments, the electric toothbrush head further includes a covering member, the covering member at least covers the outer side of the side wall of the rod body, and the covering member and the first sealing member are an integral structure.

[0020] The covering member and the first sealing member are an integrated structure, that is, the covering member and the first sealing member are an integral structure, which can facilitate the processing and manufacturing of the covering member and the first sealing member on the one hand, and can improve the sealing effect of the first sealing member on the other hand, and prevent the accumulation of liquid in the accommodating cavity. In addition, the covering member and the first sealing member are an integrated structure, which can also improve the stability of the connection between the first sealing member and the covering member and the rod body, and reduce the possibility of the first sealing member and the covering member falling off the rod body.

[0021] In certain embodiments, the connecting member includes a top and a bottom that are opposite to each other, and the portion of the rod body from the top of the connecting member to the brush body is an integral solid structure.

[0022] In this way, in the length direction of the rod body, the part of the rod body from the top of the connecting piece to the brush body is a solid structure, so that the possibility of the flow range of the liquid flowing into the accommodating chamber exceeding the space between the first end of the rod body and the first sealing member can be further reduced, the sealing effect of the first sealing member can be improved, and the liquid can be prevented from accumulating in the accommodating chamber. On the one hand, the weight of the electric toothbrush head can be prevented from increasing, the amplitude of the vibration of the electric toothbrush head can be ensured, and the cleaning effect of the electric toothbrush can be improved; on the other hand, the inside of the rod body can be prevented from being corroded by liquid, and the service life of the electric toothbrush head can be extended; on the other hand, the liquid inside the accommodating chamber can be prevented from accumulating and breeding bacteria, ensuring oral health. In addition, the part of the rod body from the top of the connecting piece to the brush body is an integrated sealing structure, which can also facilitate the installation and positioning of the connecting piece and improve the assembly efficiency of the electric toothbrush head.

[0023] In some embodiments, the connecting member includes a relative top and bottom, and is provided with an installation cavity passing through the bottom and a through hole connected to the installation cavity; the connecting member is an integral structure, and the area on the connecting member except the through hole is a closed structure that blocks the connection between the installation cavity and the accommodating cavity.

[0024] In this way, any area on the connecting part except the through hole cannot connect the installation cavity and the accommodating cavity. In other words, when external liquid enters the installation cavity, the liquid cannot enter the accommodating cavity through any area except the through hole, thereby further improving the waterproof effect of the electric toothbrush head. On the one hand, it can prevent the weight of the electric toothbrush head from increasing, ensure the amplitude of the vibration of the electric toothbrush head, and improve the cleaning effect of the electric toothbrush; on the other hand, it can prevent the inside of the rod body from being corroded by liquid, thereby extending the service life of the electric toothbrush head; on the other hand, it can prevent the accumulation of liquid inside the accommodating cavity and the breeding of bacteria, thereby ensuring oral health.

[0025] In some embodiments, the connecting member includes a relative top and bottom, and a side connecting the top and the bottom; the sealing structure includes a second sealing member, which is connected to both the rod body and the connecting member and is used to seal the gap between the inner side of the side wall of the rod body and the outer side of the side.

[0026] Among them, the setting of the second seal can prevent external liquid from entering the accommodating cavity through the gap between the inner side of the side wall of the rod body and the outer side of the side portion, thereby preventing the electric toothbrush head from being contaminated on the one hand; on the other hand, it can prevent the weight of the electric toothbrush head from increasing, ensuring the amplitude and sweeping amplitude of the electric toothbrush head, and improving the cleaning effect of the electric toothbrush.

[0027] In some embodiments, the second sealing member is located between the inner side of the side wall of the rod body and the outer side of the side portion, and blocks the gap between the inner side of the side wall of the rod body and the outer side of the side portion.

[0028] In some embodiments, the second sealing member is a rubber sealing ring.

[0029] In certain embodiments, the second sealing member is a sealant.

[0030] In some embodiments, the electric toothbrush head further includes a covering member, wherein the covering member at least covers the inner side of the side wall of the rod body, and the covering member located on the inner side of the side wall of the rod body forms the second sealing member.

[0031] In certain embodiments, the electric toothbrush head further comprises a covering member, wherein the covering member at least covers the outer side of the side portion, and the covering member located on the outer side of the side portion forms the second sealing member.

[0032] In some embodiments, the second sealing member is located on the bottom wall of the rod body and blocks a gap between the side wall of the rod body and the side portion.

[0033] In some embodiments, the second sealing member is a rubber sealing ring.

[0034] In certain embodiments, the second sealing member is a sealant.

[0035] In some embodiments, the electric toothbrush head further includes a covering member, which covers at least the bottom wall of the rod body and the bottom of the connecting member, and the covering member covering the bottom wall of the rod body and the bottom of the connecting member forms the second sealing member.

[0036] In some embodiments, the electric toothbrush head further comprises a covering member, the covering member at least covers the bottom wall of the rod body, the bottom of the connecting member, and the inner side of the side wall of the rod body, and the covering member covering the bottom wall of the rod body, the bottom of the connecting member, and the inner side of the side wall of the rod body forms the second sealing member. In this way, the sealing effect of the second sealing member on the gap between the inner side of the side wall of the rod body and the outer side of the side portion can be further improved.

[0037] In some embodiments, when the covering member forms the second seal, the first seal and the second seal of the sealing structure are an integrated structure. The integrated first seal and the second seal can provide a more continuous sealing method for the electric toothbrush head, reduce potential gaps, and improve the sealing effect.

[0038] In some embodiments, when the covering member forms the second sealing member, the covering member also covers the outer side of the side wall of the rod body. In the embodiment of the present application, when the covering member forms the second sealing member, the hardness of the second sealing member is less than the hardness of the rod body, thereby, the provision of the second sealing member can also reduce the possibility of direct collision between the electric toothbrush head and the oral cavity during the user's brushing process, thereby effectively protecting the user's oral cavity.

[0039] In some embodiments, the first sealing member, the second sealing member, and the covering member located on the outer side of the side wall of the rod body of the sealing structure are an integrated structure.

[0040] This can facilitate the processing and manufacturing of the first seal, the second seal, and the covering member located on the outer side of the side wall of the rod body; on the other hand, it can improve the sealing effect of the first seal and the second seal to prevent liquid from accumulating in the accommodating cavity. In addition, the first seal, the second seal, and the covering member located on the outer side of the side wall of the rod body are an integrated structure, which can also reduce the possibility of the first seal, the second seal, and the covering member located on the outer side of the side wall of the rod body falling off from the rod body.

[0041] In certain embodiments, when the covering member forms the second seal, the covering member also covers all areas of the outer side of the side wall of the rod body, all areas of the bottom wall of the rod body, and all areas of the brush body except the bristles.

[0042] In the present embodiment, the outer side of the side wall of the rod body, the bottom wall of the rod body and the entire brush body are not exposed. In this way, when the electric toothbrush head collides with the oral cavity, at least part of the covering part covering all areas of the outer side of the side wall of the rod body, all areas of the bottom wall of the rod body and all areas of the brush body except the bristles can produce elastic deformation, thereby avoiding oral damage caused by collision between the electric toothbrush head and the oral cavity, thereby effectively protecting the user's oral cavity.

[0043] In some embodiments, the electric toothbrush head further includes a covering, which covers all areas of the outer side of the side wall of the rod body, all areas of the bottom wall of the rod body, and all areas of the brush body except the bristles, and the rod body and the covering are both light-transmissive.

[0044] In this way, the user can directly observe the internal structure of the electric toothbrush head, which makes it easier for the user to determine the use of the electric toothbrush head and replace the electric toothbrush head, thereby ensuring the cleaning effect of the electric toothbrush. In addition, the rod body and the covering are both light-transmissive, which can make the electric toothbrush head more aesthetic, enhance the credibility of the product, and make the electric toothbrush head more technological.

[0045] In some embodiments, the connecting member includes a relative top and bottom, and a side connecting the top and the bottom, and a first fixing portion is provided on the inner side of the side, and the first fixing portion is used to be fixedly connected to the output shaft of the motor; the first fixing portion is a protrusion protruding from the inner side of the side toward the axial direction of the mounting cavity, and the protrusion is detachably connected to the output shaft; the protrusion includes a supporting surface, and the output shaft includes a surface to be supported, the supporting surface abuts against the surface to be supported, and the supporting surface and the surface to be supported are both planes; there are at least two protrusions, and at least two of the protrusions are evenly distributed around the axis of the mounting cavity.

[0046] The first fixing portion can transmit the vibration generated by the motor, so that the bristles on the brush body can vibrate at a high frequency to clean the area to be cleaned in the oral cavity.

[0047] Furthermore, the protrusion is detachably connected to the output shaft, thereby facilitating the removal of the electric toothbrush head from the output shaft of the motor, thereby facilitating the replacement of electric toothbrush heads of different models or materials; on the other hand, when the electric toothbrush head is used for a long enough time and the cleaning effect is reduced, a new electric toothbrush head can be replaced to ensure the cleaning effect of the electric toothbrush.

[0048] In addition, the provision of at least two protrusions can improve the stability of the connection between the output shaft and the connecting piece, and reduce the possibility of the connecting piece falling off the output shaft during the use of the electric toothbrush, thereby improving the stability and reliability of the operation of the electric toothbrush.

[0049] In some embodiments, a deformable second fixing portion is further provided on the inner side of the side portion, the second fixing portion is closer to the bottom than the first fixing portion, and the second fixing portion is used to be elastically connected to the output shaft; the first end of the second fixing portion is connected to the inner side of the side wall, and the second end is a free end, and the second end of the second fixing portion can be deformed with the first end of the second fixing portion as a fulcrum.

[0050] In which, when the output shaft extends into the installation cavity, the second end of the second fixed portion can be elastically connected to the output shaft, which can improve the connection strength between the output shaft and the connecting piece and reduce the possibility of the connecting piece falling off the output shaft during the use of the electric toothbrush, thereby improving the stability and reliability of the electric toothbrush.

[0051] In some embodiments, the length of the connecting member is less than or equal to half the length of the rod body.

[0052] This can prevent the gas in the accommodating cavity from being over-compressed during the installation of the connecting piece in the accommodating cavity, resulting in poor sealing between the rod body and the connecting piece, or even causing expansion and damage to the rod body. This can extend the service life of the rod body while ensuring the waterproof effect of the electric toothbrush head, that is, extend the service life of the electric toothbrush head.

[0053] The electric toothbrush of the embodiment of the present application comprises the electric toothbrush head and the brush handle of any one of the above embodiments, and the electric toothbrush head is mounted on the brush handle.

[0054] In the electric toothbrush of the embodiment of the present application, the sealing structure is connected to the rod body, and the sealing structure is at least used to seal the gap between the inner side of the side wall of the rod body and the connecting piece, thereby preventing liquid from entering the accommodating chamber through the gap between the inner side of the side wall of the rod body and the connecting piece, thereby preventing liquid from accumulating in the accommodating chamber. On the one hand, it can prevent the weight of the electric toothbrush head from increasing, ensure the amplitude of the vibration of the electric toothbrush head, and improve the cleaning effect of the electric toothbrush; on the other hand, it can prevent the inside of the rod body from being corroded by liquid, thereby extending the service life of the electric toothbrush head; on the other hand, it can prevent liquid from accumulating in the accommodating chamber and breeding bacteria, thereby ensuring oral health.

[0055] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0057] Figure 1 is a schematic diagram of the three-dimensional structure of an electric toothbrush according to some embodiments of the present application;

[0058] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of an electric toothbrush head in the electric toothbrush shown;

[0059] Figure 3 yes Figure 2 The three-dimensional exploded schematic diagram of the electric toothbrush head shown;

[0060] Figure 4 yes Figure 2 A schematic cross-sectional view of an electric toothbrush head shown;

[0061] Figure 5 yes Figure 2 A schematic diagram of the three-dimensional structure of the connecting member in the electric toothbrush head shown;

[0062] Figure 6 yes Figure 2 A cross-sectional schematic diagram of a connecting member in an electric toothbrush head shown;

[0063] Figure 7 yes Figure 2 Another cross-sectional schematic diagram of the connecting member in the electric toothbrush head is shown.

[0064] Description of main component symbols:

[0065] Electric toothbrush 1000;

[0066] Electric toothbrush head 100; brush handle 200; motor 300;

[0067] Brush body 10;

[0068] The rod body 20, the first end 201, the second end 203, the accommodating cavity 205, the first cavity 2051, the second cavity 2053, the side wall 21, the side wall body 211, the guide portion 213, and the through hole 23;

[0069] Connecting member 30, top 31, bottom 32, mounting cavity 33, through hole 34, side portion 35, first fixing portion 36, abutting surface 361, second fixing portion 37, first end 371, second end 373;

[0070] Sealing structure 410 ; first sealing member 40 ; second sealing member 50 ; covering member 60 ; bristles 70 . DETAILED DESCRIPTION

[0071] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0072] In the description of the present application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0073] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. In an example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection, or they can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.

[0074] As people's living standards improve, they pay more and more attention to oral health. Compared with traditional manual toothbrushes, electric toothbrushes have significant advantages in cleaning efficiency, ease of use and comfort, so they are becoming more and more popular among the public, and the functions and appearance designs of electric toothbrushes are constantly enriched.

[0075] Typically, an electric toothbrush includes a body and an electric toothbrush head. The body includes a brush handle and a motor installed in the brush handle. The electric toothbrush head includes a rod body and a connecting piece installed in the rod body. The output shaft of the motor is connected to the connecting piece. The motor drives the rod body to vibrate to drive the brush body connected to the rod body to vibrate, thereby driving the bristles to vibrate to the area to be cleaned in the oral cavity. Since the electric toothbrush head is an external part of the electric toothbrush and will not affect the corrosion of the body, there is basically no liquid-proof design for the electric toothbrush head at present. However, once liquid enters the interior of the electric toothbrush head and forms accumulation, on the one hand, it will increase the weight of the electric toothbrush head, reduce the amplitude of the vibration of the electric toothbrush head, and affect the cleaning effect of the electric toothbrush; on the other hand, the liquid will corrode the interior of the electric toothbrush head and affect the service life of the electric toothbrush head; on the other hand, the liquid will also cause bacteria to grow inside the electric toothbrush head, which will seriously affect oral health. To solve this problem, please refer to Figure 1 , an embodiment of the present application provides an electric toothbrush head 100 and an electric toothbrush 1000 .

[0076] See also Figure 1The electric toothbrush 1000 of the embodiment of the present application includes an electric toothbrush head 100 and a brush handle 200, and the electric toothbrush head 100 is installed on the brush handle 200. Among them, since the electric toothbrush 1000 in the present embodiment includes the electric toothbrush head 100, it can be understood that the electric toothbrush 1000 includes at least the same beneficial effects as the electric toothbrush head 100, so the beneficial effects of the electric toothbrush 1000 refer to the beneficial effects of the electric toothbrush head 100 described below.

[0077] Furthermore, in some embodiments, the electric toothbrush 1000 may further include a motor 300, which is disposed on the brush handle 200, and the output shaft of the motor 300 extends out of the brush handle 200 to be connected to the electric toothbrush head 100. When the motor 300 operates stably, the motor 300 can drive the electric toothbrush head 100 to vibrate at a high frequency, so that the electric toothbrush 1000 can clean the part to be cleaned in the oral cavity through the electric toothbrush head 100 vibrating at a high frequency.

[0078] It should be noted that, in some embodiments, the motor 300 includes but is not limited to a linear motor, a rotary motor or a bidirectional motor, etc. Among them, the output shaft of the motor 300 can be connected to the electric toothbrush head 100 in a detachable manner, so that on the one hand, it is convenient to replace the electric toothbrush head 100 of different models or different materials; on the other hand, when the electric toothbrush head 100 is used for a long enough time and the cleaning effect is reduced, it is convenient to replace a new electric toothbrush head 100, thereby ensuring the cleaning effect of the electric toothbrush 1000.

[0079] See also Figures 2 to 4 The electric toothbrush head 100 of the embodiment of the present application includes a brush body 10, a rod body 20, a connecting piece 30 and a sealing structure 410. The brush body 10 is provided with bristles 70. The rod body 20 includes a first end 201 and a second end 203 opposite to each other, the second end 203 of the rod body is connected to the brush body 10, and the rod body 20 is provided with a receiving cavity 205 penetrating the first end 201 of the rod body. The sealing structure 410 is connected to the rod body 20, and the sealing structure 410 is at least used to seal the gap between the inner side of the side wall 21 of the rod body 20 and the connecting piece 30.

[0080] Please combine Figure 1The rod body 20 includes a first end 201 and a second end 203 opposite to each other. The first end 201 of the rod body is detachably connected to the output shaft (not shown) of the motor 300, and the second end 203 of the rod body is connected to the brush body 10. The rod body 20 is generally in the shape of a long strip, so that the rod body 20 can be easily inserted into the oral cavity, so that the bristles 70 on the brush body 10 can touch the part to be cleaned in the oral cavity, thereby ensuring the cleaning effect of the electric toothbrush 1000. The part to be cleaned may include the tooth surface, tooth gap and gums of the teeth. In the embodiment of the present application, when the motor 300 is running stably, the rod body 20 can transmit the vibration of the motor 300 to the brush body 10, and the brush body 10 then transmits the vibration to the bristles 70, and the bristles 70 can clean the part to be cleaned in the oral cavity during the vibration process. It should be noted that in some embodiments, the rod body 20 can be made of a hard material, such as plastics such as PP, ABS or PBT.

[0081] The brush body 10 is a structure for carrying the bristles 70. The brush body 10 is connected to the rod body 20, and can transmit the vibration of the rod body 20 to the bristles 70, so that the bristles 70 vibrate to clean the parts of the oral cavity that need to be cleaned. It should be noted that in some embodiments, the brush body 10 can be made of a hard material, such as plastics such as PP, ABS or PBT. The material of the brush body 10 and the material of the rod body 20 can be the same, for example, the material of the brush body 10 and the material of the rod body 20 are both PP plastic; or, the material of the brush body 10 and the material of the rod body 20 can also be different, for example, the material of the brush body 10 is PP plastic, and the material of the rod body 20 is ABS plastic.

[0082] In some embodiments, the brush body 10 and the rod body 20 are an integrated structure, that is, the brush body 10 and the rod body 20 are an integral structure, thereby improving the bonding strength between the brush body 10 and the rod body 20, preventing the brush body 10 and the rod body 20 from separating during the operation of the electric toothbrush 1000, thereby ensuring the stability and reliability of the operation of the electric toothbrush 1000. In other embodiments, the brush body 10 and the rod body 20 are split structures, that is, the brush body 10 and the rod body 20 are two different structures. In some examples, the brush body 10 and the rod body 20 can be combined together by a non-detachable connection method, and the non-detachable connection method includes but is not limited to bonding or welding.

[0083] The bristles 70 are a structure for cleaning and / or caring for the parts of the oral cavity that need to be cleaned. The bristles 70 can be arranged on the brush body 10 by a copper-based bristle implantation process or a copper-free bristle implantation process. The material of the bristles 70 includes but is not limited to nylon, polyamide or silicone.

[0084] The connector 30 is a structure for connecting the output shaft of the motor 300 and the rod body 20. The connector 30 and the rod body 20 can be connected together by a non-detachable connection method, and the non-detachable connection method includes but is not limited to bonding, welding or interference connection. Among them, the connector 30 can be made of metal material or non-metal material, and the metal material includes but is not limited to aluminum alloy or steel; the non-metal material includes but is not limited to plastic. Exemplarily, the connector 30 is made of metal material, which can improve the structural strength of the connector 30, reduce the possibility of collision damage to the connector 30, and ensure the normal connection between the electric toothbrush head 100 and the brush handle 200; or, the connector 30 is made of non-metal material, so that the weight of the connector 30 is relatively light, which is conducive to the lightweight of the electric toothbrush head 100 and the electric toothbrush 1000.

[0085] Among them, since the use environment of the electric toothbrush head 100 is a watery and humid environment, during the use of the electric toothbrush head 100, liquid may enter the accommodating chamber 205 through the gap between the inner side of the side wall 21 of the rod body 20 and the connecting piece 30, and form accumulation in the accommodating chamber 205, which may easily cause the electric toothbrush head 100 to be contaminated or even damaged, affecting oral health and shortening the service life of the electric toothbrush 1000. In addition, the liquid entering the accommodating chamber 205 and forming accumulation will also increase the weight of the electric toothbrush head 100, thereby causing the amplitude and sweep amplitude of the electric toothbrush head 100 to weaken, affecting the cleaning effect. Therefore, the setting of the sealing structure 410 can prevent the weight of the electric toothbrush head 100 from increasing, ensure the amplitude of the vibration of the electric toothbrush head 100, and improve the cleaning effect of the electric toothbrush 1000; on the other hand, it can prevent the interior of the rod body 20 from being corroded by liquid, extending the service life of the electric toothbrush head 100; on the other hand, it can prevent the accumulation of liquid inside the accommodating chamber 205 and breed bacteria, ensuring oral health.

[0086] In the electric toothbrush head 100 of the embodiment of the present application, the sealing structure 410 is at least used to seal the gap between the inner side of the side wall 21 of the rod body 20 and the connecting piece 30, thereby preventing the liquid from entering the accommodating chamber 205 through the gap between the inner side of the side wall 21 of the rod body 20 and the connecting piece 30, thereby preventing the liquid from accumulating in the accommodating chamber 205, and thus, on the one hand, preventing the weight of the electric toothbrush head 100 from increasing, ensuring the amplitude of the vibration of the electric toothbrush head 100, and improving the cleaning effect of the electric toothbrush 100; on the other hand, preventing the inside of the rod body 20 from being corroded by liquid, extending the service life of the electric toothbrush head 100; and on the other hand, preventing the accumulation of liquid in the accommodating chamber 205 and breeding bacteria, thereby ensuring oral health.

[0087] The electric toothbrush head 100 is further described below with reference to the accompanying drawings.

[0088] See also Figures 2 to 4 In some embodiments, the rod body 20 is provided with a through hole 23 penetrating the side wall 21 of the rod body 20 , the through hole 23 is connected to the accommodating cavity 205 , and the sealing structure 410 includes a first sealing member 40 , and the through hole 23 is used to form the first sealing member 40 .

[0089] Specifically, in some embodiments, the material of the first sealing member 40 may include but is not limited to at least one of silicone, rubber, soft glue, polyurethane or plastic. In the case where the first sealing member 40 is soft glue, the first sealing member 40 can be injected into the accommodating cavity 205 through the perforation 23, that is, the soft glue can be injected into the accommodating cavity 205 through the perforation 23 and form the first sealing member 40 after solidification.

[0090] Please combine Figure 5 In some embodiments, the coupling 30 includes a top 31 and a bottom 32 that are opposite to each other, and is provided with a mounting cavity 33 that passes through the bottom 32 and a through hole 34 that communicates with the mounting cavity 33. The mounting cavity 33 is provided for the output shaft of the power supply motor 300 to extend into the mounting cavity 33 and connect with the coupling 30. The provision of the through hole 34 can facilitate the coupling 30 to complete its own positioning molding process, and / or facilitate the coupling 30 to make a structure connected with the output shaft of the motor 300.

[0091] In some embodiments, when the through hole 34 is provided on the side 35 of the connecting member 30, the number of the through holes 34 includes two, and the two through holes 34 penetrate in one direction. Specifically, in some embodiments, the two through holes 34 can penetrate in a direction perpendicular to the length direction X of the rod body 20, so that the processing and manufacturing of the connecting member 30 can be facilitated, and the positioning and molding process of the connecting member 30 can be completed, thereby improving the production efficiency of the connecting member 30.

[0092] Among them, since the use environment of the electric toothbrush head 100 is a watery and humid environment, during the use of the electric toothbrush head 100, liquid may enter the installation cavity 33 and enter the accommodating cavity 205 through the through hole 34, and form accumulation in the accommodating cavity 205, which may easily cause the electric toothbrush head 100 to be contaminated or even damaged, affecting oral health and shortening the electric toothbrush 100 ( Figure 1In addition, the liquid entering the accommodating chamber 205 and forming an accumulation will also increase the weight of the electric toothbrush head 100, thereby causing the amplitude and sweep amplitude of the electric toothbrush head 100 to weaken, affecting the cleaning effect. In some embodiments, the first seal 40 corresponds to the perforation 23, and is used to ensure that the flow range of the liquid flowing into the accommodating chamber 205 does not exceed the space between the first end 201 of the rod body and the first seal 40. In this way, the provision of the first seal 40 can, on the one hand, prevent the weight of the electric toothbrush head 100 from increasing, ensure the amplitude of the vibration of the electric toothbrush head 100, and improve the cleaning effect of the electric toothbrush 100; on the other hand, it can prevent the interior of the rod body 20 from being corroded by the liquid, thereby extending the service life of the electric toothbrush head 100; on the other hand, it can prevent the accumulation of liquid inside the accommodating chamber 205 and the breeding of bacteria, thereby ensuring oral health.

[0093] See also Figure 3 and Figure 4 In some embodiments, the extension direction of the center line of the through hole 23 is perpendicular to the length direction X of the rod body 20. Therefore, when the first seal 40 is a soft rubber, the flow rate of the first seal 40 entering the accommodating cavity 205 through the through hole 23 is relatively slow, thereby improving the orderliness of the flow of the first seal 40, and further improving the sealing effect of the first seal 40, preventing the flow range of the liquid flowing into the accommodating cavity 205 from exceeding the space between the first end 201 of the rod body and the first seal 40. It should be noted that the length direction X of the rod body 20 can be the direction from the first end 201 of the rod body to the second end 203 of the rod body; or, the direction from the second end 203 of the rod body to the first end 201 of the rod body.

[0094] In some examples, the number of the perforations 23 is one. In other examples, the number of the perforations 23 includes at least two, and at least two perforations 23 are arranged at intervals on the side wall 21 of the rod body 20, and in the length direction X of the rod body 20, the centers of at least two perforations 23 are on the same horizontal plane, that is, the distance between the centers of at least two perforations 23 and the first end 201 of the rod body is the same. In this way, when the first sealing member 40 is soft rubber, the provision of at least two perforations can increase the forming rate of the first sealing member 40, thereby improving the production efficiency of the electric toothbrush head 100.

[0095] Please combine Figure 4 In some embodiments, the side wall 21 of the rod body 20 includes a side wall body 211 and a guide portion 213 , the guide portion 213 is disposed on the side wall body 211 and extends toward the center of the accommodating cavity 205 relative to the side wall body 211 , and the through hole 23 passes through the side wall body 211 and the guide portion 213 .

[0096] Specifically, when the first seal 40 is soft rubber, the setting of the guide portion 213 can make the flow rate of the first seal 40 entering the accommodating chamber 205 through the perforation 23 relatively slow, thereby improving the orderliness of the flow of the first seal 40. On the one hand, this can improve the sealing effect of the first seal 40; on the other hand, it can reduce the usage of the first seal 40, thereby reducing the production cost of the electric toothbrush head 100.

[0097] In some embodiments, the guide portion 213 is at least one block-shaped protrusion. Specifically, in some examples, the quantitative relationship between the block-shaped protrusion and the perforation 23 can be one-to-one, that is, one block-shaped protrusion corresponds to one perforation 23. It is understood that when the block-shaped protrusion includes at least two, at least two block-shaped protrusions are spaced apart on the side wall body 211.

[0098] In other embodiments, the guide portion 213 is an annular protrusion. Specifically, the relationship between the number of annular protrusions and the through-holes 23 can be one-to-one; or, multiple-to-one, that is, one annular protrusion corresponds to one through-hole 23; or, one annular protrusion corresponds to multiple through-holes 23. Wherein, in the case where the guide portion 213 is an annular protrusion, the outermost circle shape of the cross section of the guide portion 213 cut by a plane perpendicular to the length direction X of the rod body 20 is the same as the innermost circle shape of the cross section of the side wall body 211 cut by a plane perpendicular to the length direction X of the rod body 20.

[0099] See also Figure 3 and Figure 4 In some embodiments, in the length direction X of the rod body 20 , the lowest point of the through hole 23 on the inner side of the side wall 21 of the rod body 20 is flush with the top 31 .

[0100] Specifically, in some embodiments, the lowest point of the perforation 23 on the inner side of the side wall 21 of the rod body 20 is: the end of the opening of the perforation 23 on the inner side of the side wall 21 of the rod body 20 closest to the first end 201 of the rod body (hereinafter referred to as the "lowest point"). The lowest point of the perforation 23 on the inner side of the side wall 21 of the rod body 20 is flush with the top 31, that is, the distance between the lowest point and the first end 201 of the rod body is equal to the distance between the top 31 and the first end 201 of the rod body. In this way, when the first seal 40 flows into the accommodating cavity 205 through the perforation 23, the first seal 40 can be directly arranged on the top 31, so that while ensuring the sealing effect of the first seal 40, the amount of the first seal 40 can be reduced, thereby reducing the production cost of the electric toothbrush head 100.

[0101] In some embodiments, the first seal 40 is filled between the perforation 23 and the second end 203 of the rod body. Thus, in the length direction X of the rod body 20, the portion of the rod body 20 from the perforation 23 to the second end 203 of the rod body is a solid structure, so that the possibility that the flow range of the liquid flowing into the accommodating cavity 205 exceeds the space between the first end 201 of the rod body and the first seal 40 can be further reduced, and the sealing effect of the first seal 40 can be improved, and the accumulation of liquid in the accommodating cavity 205 can be prevented, thereby ensuring the amplitude of the vibration of the electric toothbrush head 100 and improving the cleaning effect of the electric toothbrush 1000; on the other hand, the inside of the rod body 20 can be prevented from being corroded by liquid, thereby extending the service life of the electric toothbrush head 100; on the other hand, the accumulation of liquid in the accommodating cavity 205 can be prevented to breed bacteria, thereby ensuring oral health.

[0102] Please continue reading Figure 3 and Figure 4 In some embodiments, the first sealing member 40 divides the accommodating cavity 205 into a first cavity 2051 and a second cavity 2053 which are not connected. In the length direction X of the rod body 20 , the second cavity 2053 is closer to the brush body 10 than the first cavity 2051 , and the through hole 34 is located in the first cavity 2051 .

[0103] In this way, when liquid enters the accommodating chamber 205 through the through hole 34, the liquid can only be located in the first chamber 2051, so that the liquid entering the accommodating chamber 205 cannot form accumulation, thereby, on the one hand, preventing the weight of the electric toothbrush head 100 from increasing, ensuring the amplitude of the vibration of the electric toothbrush head 100, and improving the cleaning effect of the electric toothbrush 100; on the other hand, preventing the inside of the rod body 20 from being corroded by liquid, extending the service life of the electric toothbrush head 100; and still further preventing the accumulation of liquid in the accommodating chamber 205 and the breeding of bacteria, thereby ensuring oral health.

[0104] Please combine Figure 4 In some embodiments, the first sealing member 40 matches the shape of the flow surface of the accommodating chamber 205 to divide the accommodating chamber 205 into a first chamber 2051 and a second chamber 2053 that are not connected, and the connecting member 30 is located in the first chamber 2051.

[0105] Specifically, in some embodiments, the cross-sectional shape of the first sealing member 40 cut by a plane perpendicular to the length direction X of the rod body 20 (hereinafter referred to as the first cross-sectional shape) matches the cross-sectional shape of the accommodating cavity 205 cut by a plane perpendicular to the length direction X of the rod body 20 (hereinafter referred to as the second cross-sectional shape). Exemplarily, the first cross-sectional shape and the second cross-sectional shape are both circular, thereby, the first sealing member 40 can separate the accommodating cavity 205 into a first cavity 2051 and a second cavity 2053 that are not connected, and the connecting member 30 is accommodated in the first cavity 2051.

[0106] It is understandable that in this embodiment, the through hole 34 is provided at the top 31 and / or the side 35, so that the applicability of the connecting member 30 can be improved, that is, under the premise of ensuring the waterproofness of the electric toothbrush head 10, the connecting member 30 with the through hole 34 provided at the top 31 and / or the side 35 can be used in conjunction with the rod body 20. Specifically, in one example, the through hole 34 is provided at the top 31. In another example, the through hole 34 is provided at the side 35. In yet another example, the through hole 34 is provided at the top 31 and the side 35.

[0107] In other embodiments, the through hole 34 is disposed on the side 35 , and the first sealing member 40 is sleeved on the side 35 of the connecting member 30 , and together with the connecting member 30 , divides the accommodating cavity 205 into a first cavity 2051 and a second cavity 2053 that are not connected.

[0108] Specifically, in some embodiments, the first seal 40 is disposed between the inner side of the side wall 21 of the rod body 20 and the side 35 of the connecting member 30, and the first seal 40 is connected to the inner side of the side wall 21 of the rod body 20 and the side 35 of the connecting member 30. In this way, the first seal 40 can, together with the side 35 of the connecting member 30 and the top 31 of the connecting member 30, divide the accommodating cavity 205 into a first cavity 2051 and a second cavity 2053 that are not connected.

[0109] See also Figure 3 and Figure 4 In some embodiments, the electric toothbrush head 100 further includes a covering member 60 , which covers at least the outer side of the side wall 21 of the rod body 20 , and the covering member 60 and the first sealing member 40 are an integral structure.

[0110] Specifically, in some embodiments, the hardness of the covering member 60 is less than the hardness of the rod body 20. In this way, when the rod body 20 collides with the oral cavity during the user's brushing process, the covering member 60 can produce elastic deformation to achieve collision buffering, thereby reducing the possibility of direct collision between the electric toothbrush head 100 and the oral cavity during the user's brushing process, thereby effectively protecting the user's oral cavity. Exemplarily, the covering member 60 can be soft rubber, so the covering member 60 can be disposed on the outer side of the side wall 21 of the rod body 20 in a rubber-coated manner. It is understandable that in some embodiments, the covering member 60 can also be made of silicone, polyurethane, rubber or plastic.

[0111] In addition, the covering member 60 and the first sealing member 40 are an integral structure, that is, the covering member 60 and the first sealing member 40 are an integral structure, which can facilitate the processing and manufacturing of the covering member 60 and the first sealing member 40 on the one hand, and can improve the sealing effect of the first sealing member 40 on the other hand, and prevent the liquid from accumulating in the accommodating cavity 205. In addition, the covering member 60 and the first sealing member 40 are an integral structure, which can also improve the stability of the connection between the first sealing member 40 and the covering member 60 and the rod body 20, and reduce the possibility of the first sealing member 40 and the covering member 60 falling off from the rod body 20.

[0112] Please combine Figure 5 In some embodiments, the portion of the rod body 20 from the top 31 of the connecting member 30 to the brush body 10 is an integral solid structure.

[0113] In this way, in the length direction X of the rod body 20, the part of the rod body 20 from the top 31 of the connecting piece 30 to the brush body 10 is a solid structure, so that the possibility of the flow range of the liquid flowing into the accommodating chamber 205 exceeding the space between the first end 201 of the rod body and the first sealing member 40 can be further reduced, and the sealing effect of the first sealing member 40 can be improved to prevent the liquid from accumulating in the accommodating chamber 205. Therefore, on the one hand, the weight of the electric toothbrush head 100 can be prevented from increasing, the amplitude of the vibration of the electric toothbrush head 100 can be ensured, and the cleaning effect of the electric toothbrush 1000 can be improved; on the other hand, the inside of the rod body 20 can be prevented from being corroded by the liquid, and the service life of the electric toothbrush head 100 can be extended; on the other hand, the liquid inside the accommodating chamber 205 can be prevented from accumulating and breeding bacteria, and oral health can be ensured. In addition, the part of the rod body 20 from the top 31 of the connecting piece 30 to the brush body 10 is an integrated sealing structure, which can also facilitate the installation and positioning of the connecting piece 30 and improve the assembly efficiency of the electric toothbrush head 100.

[0114] See also Figures 3 to 5 In some embodiments, the connecting member 30 is an integral structure, and the area on the connecting member 30 except the through hole 34 is a closed structure that blocks the connection between the installation cavity 33 and the accommodating cavity 205.

[0115] In this way, any area on the connecting member 30 except the through hole 34 cannot connect the installation cavity 33 with the accommodating cavity 205. In other words, when external liquid enters the installation cavity 33, the liquid cannot enter the accommodating cavity 205 through any area except the through hole 34, thereby further improving the waterproof effect of the electric toothbrush head 10. On the one hand, it can prevent the weight of the electric toothbrush head 100 from increasing, ensure the amplitude of the vibration of the electric toothbrush head 100, and improve the cleaning effect of the electric toothbrush 100; on the other hand, it can prevent the inside of the rod body 20 from being corroded by liquid, thereby extending the service life of the electric toothbrush head 100; on the other hand, it can prevent the accumulation of liquid in the accommodating cavity 205 and the breeding of bacteria, thereby ensuring oral health.

[0116] In addition, the connecting piece 30 is an integrated structure, which can also facilitate the processing and manufacturing of the connecting piece 30 , that is, the connecting piece 30 does not need to be spliced ​​together by multiple separate structures, thereby improving the production efficiency of the connecting piece 30 .

[0117] See also Figure 3 and Figure 4 In some embodiments, the sealing structure 410 further includes a second sealing member 50, which is connected to both the rod body 20 and the connecting member 30 and is used to seal the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35. It should be noted that in some embodiments, the material of the second sealing member 50 includes but is not limited to silicone, soft glue, polyurethane, rubber or plastic.

[0118] The second sealing member 50 is provided to prevent external liquid from entering the accommodating chamber 205 through the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35, thereby preventing the electric toothbrush head 100 from being contaminated on the one hand; on the other hand, it can prevent the weight of the electric toothbrush head 100 from increasing, ensure the amplitude and sweep of the electric toothbrush head 100, and improve the electric toothbrush 100 ( Figure 1 cleaning effect).

[0119] In some embodiments, the second sealing member 50 is located between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35 , and blocks the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35 .

[0120] Specifically, in some embodiments, the hardness of the second seal 50 is less than the hardness of the rod 20. In this way, when the electric vibration is transmitted to the rod 20 through the connecting member 30, the second seal 50 can buffer the vibration, thereby making the vibration of the rod 20 softer, thereby achieving a protective effect on the oral cavity. In addition, the second seal 50 can also achieve an interference connection with the connecting member 30, thereby improving the connection strength of the connecting member 30 on the rod 20, preventing the connecting member 30 from falling off from the rod 20 during the operation of the electric toothbrush 1000, thereby improving the stability and reliability of the operation of the electric toothbrush 1000.

[0121] In some embodiments, the second sealing member 50 is a rubber sealing ring. Specifically, the rubber sealing ring can be sleeved on the outer side of the side portion 35 and located between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35, so that the rubber sealing ring can seal the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35.

[0122] In other embodiments, the second sealing member 50 is a sealant. Specifically, the sealant can be injected into the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35, and when the sealant solidifies, the sealant can seal the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35.

[0123] In some further embodiments, the electric toothbrush head 100 further includes a covering member 60, which covers at least the inner side of the side wall 21 of the rod body 20, and the covering member 60 located on the inner side of the side wall 21 of the rod body 20 forms a second sealing member 50. In this way, on the one hand, the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35 can be sealed to prevent external liquid from entering the accommodating cavity 205; on the other hand, the contact area between the second sealing member 50 and the inner side of the side wall 21 of the rod body 20 can be increased, thereby improving the stability of the connection between the second sealing member 50 and the rod body 20 and reducing the possibility of the second sealing member 50 falling off from the rod body 20.

[0124] In some other embodiments, the electric toothbrush head 100 further includes a covering member 60, which covers at least the outer side of the side portion 35, and the covering member 60 located on the outer side of the side portion 35 forms a second sealing member 50. In this way, on the one hand, the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35 can be sealed to prevent external liquid from entering the accommodating cavity 205; on the other hand, the contact area between the second sealing member 50 and the inner side of the side wall 21 of the rod body 20 can be increased, thereby improving the stability of the connection between the second sealing member 50 and the rod body 20 and reducing the possibility of the second sealing member 50 falling off from the rod body 20.

[0125] In some examples, the hardness of the covering member 60 is less than the hardness of the rod body 20, that is, when the covering member 60 located outside the side portion 35 forms the second sealing member 50, the hardness of the second sealing member 50 is less than the hardness of the rod body 20. Therefore, the second sealing member 50 can also buffer the vibration transmitted from the connecting member 30 to the rod body 20, so that the vibration of the rod body 20 is softer, thereby achieving a protective effect on the oral cavity.

[0126] In other embodiments, the second sealing member 50 is located on the bottom wall of the rod body 20 ( Figure 4 The lowermost end of the middle rod body 20) and blocks the gap between the side wall 21 of the rod body 20 and the side portion 35.

[0127] Specifically, in some embodiments, the second sealing member 50 is a rubber sealing ring. Specifically, the rubber sealing ring can be located at the bottom wall of the rod body 20 and connected to both the rod body 20 and the connecting member 30, so that the rubber sealing ring can seal the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35.

[0128] In other embodiments, the second sealing member 50 is a sealant. Specifically, the sealant can be laid on the bottom wall and the bottom 32 of the rod body 20, and when the sealant solidifies, the sealant can seal the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35.

[0129] In some other embodiments, the electric toothbrush head 100 further includes a covering member 60, which covers at least the bottom wall of the rod body 20 and the bottom 32 of the connecting member 30, and the covering member covering the bottom wall of the rod body 20 and the bottom 32 of the connecting member 30 forms a second sealing member 50. In this way, the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35 can be sealed to prevent external liquid from entering the accommodating cavity 205.

[0130] In some further embodiments, the electric toothbrush head 100 further includes a covering member 60, which covers at least the bottom wall of the rod body 20, the bottom 32 of the connecting member 30, and the inner side of the side wall 21 of the rod body 20. The covering member 60 covering the bottom wall of the rod body 20, the bottom 32 of the connecting member 30, and the inner side of the side wall 21 of the rod body 20 forms a second sealing member 50. In this way, the sealing effect of the second sealing member 50 on the gap between the inner side of the side wall 21 of the rod body 20 and the outer side of the side portion 35 can be further improved.

[0131] See also Figure 3 and Figure 4 In some embodiments, when the second sealing member 50 is formed by the covering member 60, the first sealing member 40 and the second sealing member 50 of the sealing structure 410 are an integral structure.

[0132] Specifically, the covering member 60 forms the second seal 50, including: the covering member 60 located on the outside of the side portion 35 forms the second seal 50, the covering member 60 located on the inside of the side wall 21 of the rod body 20 forms the second seal 50, the covering member 60 covering the bottom wall of the rod body 20 and the bottom 32 of the connecting member 30 forms the second seal 50, and the covering member 60 covering the bottom wall of the rod body 20, the bottom 32 of the connecting member 30, and the inside of the side wall 21 of the rod body 20 forms the second seal 50. Among them, the integrally formed first seal 40 and second seal 50 can provide a more continuous sealing method for the electric toothbrush head 100, reduce potential gaps, and improve the sealing effect.

[0133] Please continue reading Figure 3 and Figure 4 In some embodiments, when the covering member 60 forms the second sealing member 50 , the covering member 60 also covers the outer side of the side wall 21 of the rod body 20 .

[0134] As can be seen from the above, in the electric toothbrush 1000 ( Figure 1When the electric toothbrush head 100 is working normally, the vibration frequency of the electric toothbrush head 100 is relatively high, and the rod body 20 is made of hard materials. Therefore, if the rod body 20 hits the teeth or gums in the oral cavity, it is easy to cause discomfort to the user and even damage the oral cavity. Therefore, in the embodiment of the present application, when the covering member 60 forms the second sealing member 50, the hardness of the second sealing member 50 is less than the hardness of the rod body 20. Therefore, the provision of the second sealing member 50 can also reduce the possibility of direct collision between the electric toothbrush head 100 and the oral cavity during the user's brushing process, thereby effectively protecting the user's oral cavity.

[0135] Furthermore, in some embodiments, the first sealing member 40 , the second sealing member 50 , and the covering member 60 located on the outer side of the side wall 21 of the rod body 20 are an integrated structure.

[0136] Specifically, in some embodiments, the first seal 40, the second seal 50, and the covering member 60 located on the outer side of the side wall 21 of the rod body 20 are an integrated structure, that is, the first seal 40, the second seal 50, and the covering member 60 located on the outer side of the side wall 21 of the rod body 20 can be formed into an integral structure by an integrated molding method, so that on the one hand, the processing and manufacturing of the first seal 40, the second seal 50, and the covering member 60 located on the outer side of the side wall 21 of the rod body 20 can be facilitated; on the other hand, the sealing effect of the first seal 40 and the second seal 50 can be improved to prevent liquid from accumulating in the accommodating cavity 205. In addition, the first seal 40, the second seal 50, and the covering member 60 located on the outer side of the side wall 21 of the rod body 20 are an integrated structure, which can also reduce the possibility of the first seal 40, the second seal 50, and the covering member 60 located on the outer side of the side wall 21 of the rod body 20 falling off from the rod body 20.

[0137] In some embodiments, when the covering member 60 forms the second sealing member 50 , the covering member 60 also covers all areas of the outer side of the side wall 21 of the shaft body 20 , all areas of the bottom wall of the shaft body 20 , and all areas of the brush body 10 except the bristles 70 .

[0138] Specifically, in this embodiment, the outer side of the side wall 21 of the rod body 20, the bottom wall of the rod body 20 and the brush body 10 are not leaked. In this way, when the electric toothbrush head 100 collides with the oral cavity, at least part of the covering member 60 covering all areas of the outer side of the side wall 21 of the rod body 20, all areas of the bottom wall of the rod body 20 and all areas of the brush body 10 except the bristles 70 can be elastically deformed to avoid the collision between the electric toothbrush head 100 and the oral cavity causing oral damage, thereby effectively protecting the user's oral cavity. In addition, the covering member 60 covering all areas of the outer side of the side wall 21 of the rod body 20, all areas of the bottom wall of the rod body 20 and all areas of the brush body 10 except the bristles 70 can be integrally formed, so that the second sealing member 50 can be formed more easily.

[0139] In some embodiments, the rod body 20 and the covering member 60 are both light-transmissive. In this way, the user can directly observe the internal structure of the electric toothbrush head 100, so that the user can easily determine the use of the electric toothbrush head 100 and replace the electric toothbrush head 100, thereby ensuring the cleaning effect of the electric toothbrush 1000. In addition, the rod body 20 and the covering member 60 are both light-transmissive, which can make the electric toothbrush head 100 more aesthetic, improve the credibility of the product, and make the electric toothbrush head 100 more technological.

[0140] It should be noted that, in some embodiments, the rod body 20 and the covering member 60 can be made of light-transmitting materials, including but not limited to at least one of acrylic, PC (polycarbonate), PP (polypropylene) and PVC (polyvinyl chloride).

[0141] See also Figure 1 , Figure 3 and Figure 5 In some embodiments, the connecting member 30 also includes a side portion 35 connecting the top 31 and the bottom 32, and a first fixing portion 36 is provided on the inner side of the side portion 35, and the first fixing portion 36 is used to be fixedly connected to the output shaft (not shown) of the motor 300.

[0142] Specifically, in some embodiments, when the first fixing portion 36 is fixedly connected to the output shaft of the motor 300 and the motor 300 is running stably, the vibration generated by the motor 300 can be transmitted to the rod body 20 through the first fixing portion 36, and transmitted to the brush body 10 through the rod body 20, so that the bristles 70 on the brush body 10 can vibrate at a high frequency to clean the area to be cleaned in the oral cavity.

[0143] Furthermore, please combine Figure 6In some embodiments, the first fixing portion 36 is a protrusion protruding from the inner side of the side portion 35 in the axial direction of the mounting cavity 33, and the protrusion is detachably connected to the output shaft. This facilitates the removal of the electric toothbrush head 100 from the output shaft of the motor 300, thereby facilitating the replacement of electric toothbrush heads 100 of different models or materials; on the other hand, when the electric toothbrush head 100 is used for a long enough time and the cleaning effect is reduced, it is convenient to replace a new electric toothbrush head 100, thereby ensuring the cleaning effect of the electric toothbrush 1000.

[0144] Furthermore, in some embodiments, the protrusion includes a supporting surface 361, the output shaft includes a surface to be supported 361, the supporting surface 361 is in contact with the surface to be supported 361, and the supporting surface 361 and the surface to be supported 361 are both planes. Thus, when the output shaft of the motor 300 moves, the output shaft of the motor 300 can drive the connecting member 30 and the rod body 20 to move together through the protrusion, rather than the output shaft of the motor 300 moving relative to the protrusion, thereby ensuring the normal operation of the electric toothbrush 1000.

[0145] It should be noted that, in some embodiments, there are at least two protrusions, and the at least two protrusions are evenly distributed around the axis of the installation cavity 33. Specifically, in some embodiments, there may be at least two surfaces 361 to be abutted, and the at least two surfaces 361 to be abutted correspond to the at least two protrusions. When the output shaft of the motor 300 extends into the installation cavity 33, the surfaces 361 to be abutted abut against the corresponding abutting surfaces 361 to achieve the connection between the output shaft of the motor 300 and the connecting member 30. The provision of at least two protrusions can improve the stability of the connection between the output shaft and the connecting member 30, reduce the possibility of the connecting member 30 falling off from the output shaft during the use of the electric toothbrush 1000, and thus improve the stability and reliability of the operation of the electric toothbrush 1000.

[0146] Please combine Figure 7 In some embodiments, a deformable second fixing portion 37 is further provided on the inner side of the side portion 35. The second fixing portion 37 is closer to the bottom portion 32 than the first fixing portion 36. The second fixing portion 37 is used to be elastically connected to the output shaft. The first end 371 of the second fixing portion is connected to the inner side of the side wall 21, and the second end is a free end. The second end 373 of the second fixing portion can be deformed with the first end 371 of the second fixing portion as a fulcrum.

[0147] Specifically, in some embodiments, when the output shaft extends into the mounting cavity 33, the second end 373 of the second fixing portion can be elastically connected to the output shaft, thereby improving the connection strength between the output shaft and the connecting member 30 and reducing the possibility of the connecting member 30 falling off the output shaft during the use of the electric toothbrush 1000, thereby improving the stability and reliability of the operation of the electric toothbrush 1000.

[0148] In addition, when the output shaft is pulled out from the mounting cavity 33, that is, when the electric toothbrush head 100 is removed from the output shaft, the second end 373 of the second fixed part can be deformed with the first end 371 of the second fixed part as a fulcrum, thereby reducing the coupling force between the connecting member 30 and the output shaft, thereby facilitating the removal of the electric toothbrush head 100 from the output shaft of the motor 300.

[0149] In some embodiments, the length of the connecting member 30 is less than or equal to half the length of the rod body 20. In this way, it is possible to avoid excessive compression of the gas in the accommodating cavity 205 during the installation of the connecting member 30 in the accommodating cavity 205, resulting in poor sealing between the rod body 20 and the connecting member 30, or even causing expansion and damage to the rod body 20, thereby ensuring the waterproof effect of the electric toothbrush head 100 while extending the service life of the rod body 20, that is, extending the service life of the electric toothbrush head 100.

[0150] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0151] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electric toothbrush head, characterized in that: include: A brush body, wherein bristles are provided on the brush body; A rod body, the rod body comprising a first end and a second end opposite to each other, the second end of the rod body being connected to the brush body, and the rod body being provided with a receiving cavity penetrating the first end of the rod body; A connecting piece installed in the accommodating cavity; and A sealing structure is connected to the rod body, and the sealing structure is at least used to seal the gap between the inner side of the side wall of the rod body and the connecting piece.

2. The electric toothbrush head according to claim 1, characterized in that: The rod body is provided with a through hole penetrating through the side wall of the rod body, the through hole is communicated with the accommodating cavity, the sealing structure includes a first sealing member, and the through hole is used to form the first sealing member.

3. The electric toothbrush head according to claim 2, characterized in that: The side wall of the rod body comprises a side wall body and a guide portion, wherein the guide portion is disposed on the side wall body and protrudes and extends toward the center of the accommodating cavity relative to the side wall body, and the through hole passes through the side wall body and the guide portion; The guide portion is at least one block-shaped protrusion; or, The guiding portion is an annular protrusion.

4. The electric toothbrush head according to claim 2, characterized in that: The first sealing member is filled between the through hole and the second end of the rod body.

5. The electric toothbrush head according to claim 2, characterized in that: The connecting member includes a relative top and bottom, and is provided with an installation cavity penetrating the bottom and a through hole connected to the installation cavity; the first sealing member divides the accommodating cavity into a first cavity and a second cavity that are not connected. In the length direction of the rod body, the second cavity is closer to the brush body than the first cavity, and the through hole is located in the first cavity.

6. The electric toothbrush head according to claim 5, characterized in that: The first sealing member matches the shape of the flow surface of the accommodating chamber to divide the accommodating chamber into the first chamber and the second chamber which are not connected, and the connecting member is located in the first chamber.

7. The electric toothbrush head according to claim 6, characterized in that: The coupling member further includes a side portion connecting the top portion and the bottom portion, and the through hole is disposed at the top portion and / or the side portion.

8. The electric toothbrush head according to claim 6, characterized in that: In the length direction of the rod body, the through hole is flush with the top at the lowest point on the inner side of the side wall of the rod body.

9. The electric toothbrush head according to claim 5, characterized in that: The connecting piece also includes a side portion connecting the top and the bottom, the through hole is arranged on the side portion, the first sealing member is sleeved on the side portion of the connecting piece, and together with the connecting piece, divides the accommodating cavity into the first cavity and the second cavity which are not connected.

10. The electric toothbrush head according to any one of claims 5 to 9, characterized in that: In the case where the through holes are provided at the side of the coupling member, the number of the through holes includes two, and the two through holes penetrate in one direction.

11. The electric toothbrush head according to claim 2, characterized in that: The electric toothbrush head further comprises a covering member, wherein the covering member at least covers the outer side of the side wall of the rod body, and the covering member and the first sealing member are an integral structure.

12. The electric toothbrush head according to claim 1, characterized in that: The connecting piece comprises a top and a bottom which are opposite to each other, and the part of the rod body from the top of the connecting piece to the brush body is an integral solid structure.

13. The electric toothbrush head according to claim 1, characterized in that: The connecting member includes a relative top and bottom, and is provided with an installation cavity penetrating the bottom and a through hole communicating with the installation cavity; the connecting member is an integral structure, and the area on the connecting member except the through hole is a closed structure that blocks the communication between the installation cavity and the accommodating cavity.

14. The electric toothbrush head according to claim 1, characterized in that: The coupling member includes a top portion and a bottom portion opposite to each other, and a side portion connecting the top portion and the bottom portion; the sealing structure includes: A second sealing member is connected to both the rod body and the connecting member and is used to seal a gap between an inner side of the side wall of the rod body and an outer side of the side portion.

15. The electric toothbrush head according to claim 14, characterized in that: The second sealing member is located between the inner side of the side wall of the rod body and the outer side of the side portion, and blocks the gap between the inner side of the side wall of the rod body and the outer side of the side portion.

16. The electric toothbrush head according to claim 15, characterized in that: The second sealing member is a rubber sealing ring; or The second sealing member is a sealant; or The electric toothbrush head further comprises a covering member, wherein the covering member at least covers the inner side of the side wall of the rod body, and the covering member located on the inner side of the side wall of the rod body forms the second sealing member; or The electric toothbrush head further comprises a covering member, wherein the covering member at least covers the outer side of the side portion, and the covering member located on the outer side of the side portion forms the second sealing member.

17. The electric toothbrush head according to claim 14, characterized in that: The second sealing member is located on the bottom wall of the rod body and blocks the gap between the side wall of the rod body and the side portion.

18. The electric toothbrush head according to claim 17, characterized in that: The second sealing member is a rubber sealing ring; or The second sealing member is a sealant; or The electric toothbrush head further comprises a covering member, which covers at least the bottom wall of the rod body and the bottom of the connecting member, and the covering member covering the bottom wall of the rod body and the bottom of the connecting member forms the second sealing member.

19. The electric toothbrush head according to claim 14, characterized in that: The electric toothbrush head also includes a covering, which covers at least the bottom wall of the rod body, the bottom of the connecting piece, and the inner side of the side wall of the rod body. The covering that covers the bottom wall of the rod body, the bottom of the connecting piece, and the inner side of the side wall of the rod body forms the second seal.

20. The electric toothbrush head according to any one of claims 16, 18 or 19, characterized in that: In the case where the covering member forms the second sealing member, the first sealing member and the second sealing member of the sealing structure are an integral structure.

21. The electric toothbrush head according to any one of claims 16, 18 or 19, characterized in that: In the case where the covering member forms the second sealing member, the covering member also covers the outer side of the side wall of the rod body.

22. The electric toothbrush head according to claim 21, characterized in that The first sealing member, the second sealing member and the covering member located outside the side wall of the rod body of the sealing structure are an integrated structure.

23. The electric toothbrush head according to claim 21, characterized in that In the case where the covering member forms the second sealing member, the covering member also covers all areas of the outer side of the side wall of the rod body, all areas of the bottom wall of the rod body, and all areas of the brush body except the bristles.

24. The electric toothbrush head according to claim 1, characterized in that The electric toothbrush head also includes a covering member, which covers all areas of the outer side of the side wall of the rod body, all areas of the bottom wall of the rod body, and all areas of the brush body except the bristles. The rod body and the covering member are both light-transmissive.

25. The electric toothbrush head according to claim 1, characterized in that The connecting member includes a top and a bottom relative to each other, and a side portion connecting the top and the bottom, and a first fixing portion is provided on the inner side of the side portion, and the first fixing portion is used to be fixedly connected to the output shaft of the motor; the first fixing portion is a protrusion protruding from the inner side of the side portion toward the axial direction of the mounting cavity of the connecting member, and the protrusion is detachably connected to the output shaft; the protrusion includes a supporting surface, and the output shaft includes a surface to be supported, and the supporting surface is in contact with the surface to be supported, and both the supporting surface and the surface to be supported are planes; there are at least two protrusions, and at least two of the protrusions are evenly distributed around the axis of the mounting cavity.

26. The electric toothbrush head according to claim 25, characterized in that A deformable second fixing portion is also provided on the inner side of the side portion, the second fixing portion is closer to the bottom than the first fixing portion, and the second fixing portion is used to be elastically connected to the output shaft; the first end of the second fixing portion is connected to the inner side of the side wall, and the second end is a free end, and the second end of the second fixing portion can be deformed with the first end of the second fixing portion as a fulcrum.

27. The electric toothbrush head according to claim 1, characterized in that The length of the connecting piece is less than or equal to half the length of the rod body.

28. An electric toothbrush, characterized in that: include: The electric toothbrush head according to any one of claims 1 to 27, and A brush handle, wherein the electric toothbrush head is connected to the brush handle via the connecting piece.

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