WO2022037110A1

WO2022037110A1 - Brush head assembly and electric toothbrush

Info

Publication number: WO2022037110A1
Application number: PCT/CN2021/090079
Authority: WO
Inventors: 陈连成; 宋侃; 张玉林
Original assignee: 深圳市云顶信息技术有限公司
Priority date: 2020-08-17
Filing date: 2021-04-27
Publication date: 2022-02-24
Also published as: CN213283519U

Abstract

A brush head assembly (100) and an electric toothbrush (10). The brush head assembly (100) comprises: a neck (110), the neck (110) having a first connecting surface (111); an elastic member (120), the elastic member (120) being at least partially arranged on the first connecting surface (111); a suspension member (130), which is arranged on a side of the elastic member (120) that is away from the first connecting surface (111); an oral cleaning member (140), which is partially arranged within the suspension member (130); and at least one support member (150), which is accommodated in the elastic member (120) and located between the first connecting surface (111) and the suspension member (130). The suspension member (130) presses the at least one support member (150) under an external force, such that the at least one support member (150) abuts against the first connecting surface (111), and an included angle between the suspension member (130) and the first connecting surface (111) is changed. The neck (110), the suspension member (130) and the support member (150) all have an elasticity modulus greater than that of the elastic member (120).

Description

Brush head assembly and electric toothbrush

This application claims the priority of the Chinese Patent Application No. 202021734865.8 filed with the China Patent Office on August 17, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of personal care technology, for example, to a brush head assembly and an electric toothbrush.

Background technique

Electric toothbrushes usually do not have a soft layer, and electric toothbrushes equipped with a soft layer generally set the soft layer on the outermost or middle layer of the brush handle to buffer the brushing force when the user is brushing, increase the coverage area, and make it easier to use. Fits adjacent teeth, but the above settings have the phenomenon that the brushing force is too small.

SUMMARY OF THE INVENTION

In the process of brushing teeth, the present application provides a brush head assembly and an electric toothbrush, so as to solve the problem of the brush head structure and the electric toothbrush having too little brushing force in the related art.

The first technical solution adopted in this application is: a brush head assembly, comprising:

a neck, the neck has a first connecting surface;

an elastic piece, the elastic piece is at least partially disposed on the first connecting surface;

a suspension piece, arranged on the side of the elastic piece away from the first connecting surface;

an oral cleaning member partially disposed within the suspension member; and

At least one supporting piece is accommodated in the elastic piece and located between the first connecting surface and the suspending piece, and the suspending piece can squeeze at least one of the supporting pieces when subjected to an external force, and make at least one of the supporting pieces the supporting member abuts on the first connecting surface and changes the included angle between the floating member and the first connecting surface;

The elastic moduli of the neck portion, the suspending member and the supporting member are all greater than the elastic moduli of the elastic member.

The second technical solution adopted in this application is:

An electric toothbrush comprising:

A brush head assembly as described above; and

A handle connected to the neck, the handle capable of generating and delivering mechanical stimulation to the neck.

Description of drawings

Figure 1 is a schematic diagram of an electric toothbrush in one embodiment.

FIG. 2 is a schematic diagram of an electric toothbrush in another embodiment.

FIG. 3 is a schematic diagram of the brush head assembly in Example 1. FIG.

FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3 .

FIG. 5 is an enlarged structural schematic diagram of part B in FIG. 4 .

FIG. 6 is a schematic diagram of the brush head assembly in Example 2. FIG.

FIG. 7 is a cross-sectional view taken along the line C-C in FIG. 6 .

FIG. 8 is an enlarged structural schematic diagram of the D part in FIG. 7 .

FIG. 9 is a schematic diagram of the brush head assembly in Example 3. FIG.

FIG. 10 is a cross-sectional view taken along the line E-E in FIG. 9 .

FIG. 11 is an enlarged structural schematic diagram of the F part in FIG. 10 .

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

The electric toothbrush 10 provided in the embodiment of the present application is configured to clean the oral cavity. Please refer to FIG. 1 to FIG. 11 together to describe the electric toothbrush 10 provided by the present application. An electric toothbrush 10 includes a brush head assembly 100 and a handle 200 . Optionally, the brush head assembly 100 includes a neck portion 110 , an elastic member 120 , a suspension member 130 , an oral cleaning member 140 and at least one support member 150 . Illustratively, the neck 110 includes a first end having a first connecting surface 111 and a second end disposed opposite to each other, and the second end is configured to connect with the handle 200. For example, the second end is provided with a connector 300 . The connecting piece 300 has a connecting cavity, and one end of the handle 200 can be inserted into the connecting cavity, or connected with the inner wall of the connecting cavity through threads, or integrally connected with the neck 110 , for example, by injection molding. Illustratively, the handle 200 is capable of generating and delivering mechanical stimulation to the neck 110, thereby delivering the mechanical stimulation to the oral cleaner 140 to clean the teeth, tongue, and inner walls of the oral cavity. The mechanical stimulation is generated by a vibrating motor housed in the handle 200 . The mechanical stimulation may include vibration or other movement at high frequencies (eg, frequencies greater than 50 Hz, or frequencies in the range of 250 Hz to 300 Hz).

Exemplarily, the elastic member 120 is at least partially disposed on the first connecting surface 111 . As shown in FIG. 3 to FIG. 11 , the elastic member 120 is sleeved on the neck 110 . It can be understood that in other embodiments, the elastic member 120 is only located on the first connecting surface 111 and is fixedly connected to the first connecting surface 111 . In addition, in other embodiments, the first end of the neck 110 may further have a plurality of first connecting surfaces 111, and the plurality of first connecting surfaces 111 are arranged around the first end, for example, two oppositely disposed first connecting surfaces 111.

Exemplarily, the suspension member 130 is disposed on a side of the elastic member 120 away from the first connection surface 111 . The suspending member 130 can be integrated with the elastic member 120 by bonding, ultrasonic welding or injection molding. The suspending member 130 can be located on the surface of the elastic member 120, that is, connected with the surface of the elastic member 120, or when the elastic member 120 is away from the first One side of the connection surface 111 is pre-set with an installation groove, and the suspension member 130 is integrated with the elastic member 120 by bonding, ultrasonic welding or injection molding in the form of partially embedding the installation groove. In addition to the above connection method, the suspension member 130 and the installation groove can also be connected by a snap connection, so as to facilitate the replacement of the suspension member 130 .

Illustratively, the oral cleaning member 140 is partially disposed within the suspension member 130 . Exemplarily, the oral cleaning member 140 extends to a side away from the elastic member 120 , and the oral cleaning member 140 has a fixed end connected with the suspension member 130 . 130 is connected, and the suspension member 130 is provided with an embedding hole arranged to be embedded in the fixed end, and the rigidity of the oral cleaning member 140 can be adjusted by the depth of the fixed end embedded in the embedding hole. By setting the depth of the embedded hole, the stiffness of the suspension element 130 can also be adjusted, so that the angle of the oral cleaning element 140 can be adjusted when the oral cleaning element 140 is stressed. For example, the tooth distribution curve is satisfied when brushing, so that the oral cleaning member 140 fits better with the teeth. In this embodiment, the oral cleaning member 140 includes at least one bristle tuft, and the at least one bristle tuft is evenly distributed on the suspension member 130 . In this embodiment, the tufts of bristles consist of thermally fused bristles. As mentioned above, when the first end of the neck 110 has two oppositely disposed first connecting surfaces 111, the oral cleaning elements 140 on both sides of the first end can simultaneously clean the teeth and the inner wall or tongue of the oral cavity opposite to the teeth. Department to clean.

Exemplarily, at least one support member 150 is accommodated in the elastic member 120 and located between the first connection surface 111 and the suspension member 130 . When the suspension piece 130 is subjected to an external force, the at least one support piece 150 can be pressed, so that the at least one support piece 150 abuts against the first connection surface 111 and changes the included angle between the suspension piece 130 and the first connection surface 111 , so as to meet the requirements of the oral cleaning device. The 140 force angle makes it fit the teeth better. That is, the support member 150 can serve as a fulcrum for the suspension member 130 to swing. Exemplarily, the elastic moduli of the neck 110 , the suspension member 130 and the support member 150 are all greater than the elastic modulus of the elastic member 120 . The material of the elastic member 120 is not limited to injection-molded soft glue, but can also be other hot-pressed soft glue. The elastic member 120 is configured to provide flexibility and provide a space for avoiding the swing of the suspension member 130 . At the same time, the elastic member 120 can provide a buffering effect, for example, when brushing is stressed, it can provide buffering to meet the tooth distribution profile, automatically adjust the shape of the elastic member 120, increase the brushing area, be suitable for a wider population, and provide users with a more comfortable experience . In this embodiment, the material of the elastic member 120 is thermoplastic elastomer (Thermoplastic Elastomer, TPE) or silica gel. The material of the neck 110 , the suspension member 130 and the support member 150 is hard glue.

The above-mentioned brush head assembly 100 adopts at least one support member 150, the support member 150 is accommodated in the elastic member 120 and located between the first connecting surface 111 and the suspension member 130, thereby improving the rigidity of the elastic member 120 and avoiding the elastic member 120. Excessive compression increases brushing power at the expense of cushioning.

Exemplarily, the first connection surface 111 has a first axis parallel to the first direction, the orthographic projection of the axis of the suspension member 130 on the first connection surface 111 coincides with the first axis, and the support member 150 is arranged along the first direction, The orthographic projection of the support member 150 on the first connecting surface 111 is located on the first axis. In this embodiment, the first direction is parallel to the direction indicated by the arrow X in FIG. 3 .

As shown in FIG. 1 , FIG. 3 to FIG. 11 , in one embodiment, one end of the support member 150 is fixedly connected to the first connecting surface 111 . In this embodiment, the support member 150 is integrally connected with the first connecting surface 111 , that is, the support member 150 and the neck portion 110 are integrally formed by injection molding. One end of the support member 150 away from the first connection surface 111 has a circular arc surface 151 , and the circular arc surface 151 protrudes toward the side away from the first connection surface 111 . The arrangement of the arc surface 151 makes the suspension member 130 more continuous and smooth when changing the included angle with the first connecting surface 111 , and can swing at different angles.

As shown in FIG. 2 , in another embodiment, the support member 150 is suspended between the first connection surface 111 and the suspension member 130 . In this embodiment, the suspension member 130 is forced to press the elastic member 120 to press the support member 150 against the first connecting surface 111 , so that the support member 150 becomes a fulcrum, which facilitates the suspension member 130 to swing at different angles.

The present application will be described below through specific embodiments.

Example 1

3 to 5, an electric toothbrush 10 as described above, the brush head assembly 100 of the electric toothbrush 10 includes a neck 110, an elastic member 120, a suspension member 130, an oral cleaning member 140 and at least one support 150 pieces. Wherein, the number of the support member 150 is one. One end of the support member 150 is fixedly connected to the first connection surface 111 . The support member 150 is cylindrical, and one end of the support member 150 away from the first connection surface 111 has a circular arc surface 151 , the circular arc surface 151 protrudes toward the side of the support member 150 away from the first connection surface 111 , and the circular arc surface 151 abuts against the support member 150 . In the middle of the suspension member 130 on the side close to the first connection surface 111 , the suspension member 130 can swing with the support member 150 as a fulcrum when the suspension member 130 is stressed. In this embodiment, the arc surface 151 is a hemispherical surface.

Example 2

6 to 8, an electric toothbrush 10 as described above, the brush head assembly 100 of the electric toothbrush 10 includes a neck 110, an elastic member 120, a suspension member 130, an oral cleaning member 140 and at least one support 150 pieces. The number of the support members 150 is two, one end of the support member 150 is fixedly connected to the first connection surface 111 , the support member 150 is cylindrical, and the end of the support member 150 away from the first connection surface 111 has a circular arc surface 151 . The arc surface 151 protrudes toward the side away from the support member 150 of the first connection surface 111 , and the circular arc surface 151 abuts on the side of the suspension member 130 close to the first connection surface 111 . In this embodiment, the arc surface 151 is a hemispherical surface. The two support members 150 are symmetrically arranged with respect to the middle of the suspension member 130 on the side close to the first connection surface 111 . It can be understood that in other embodiments, the number of support members 150 may be at least three or more, and the stiffness of the elastic member 120 can be improved by changing the number and/or distribution of the support members 150 .

Example 3

9 to 11, an electric toothbrush 10 as described above, the brush head assembly 100 of the electric toothbrush 10 includes a neck 110, an elastic member 120, a suspension member 130, an oral cleaning member 140 and at least one support 150 pieces. Wherein, the number of the support member 150 is one. The support 150 includes a connecting plate 152 extending in the first direction. The connecting plate 152 is connected to the first connecting surface 111, and the connecting plate 152 and the neck 110 can be made by an integral molding process, or can be made separately and then connected together. The arc surface 151 is formed at one end of the connecting plate 152 away from the first connecting surface 111 . In this embodiment, the shape of the arc surface 151 is not limited, as long as the support member 150 can achieve its function. Exemplarily, the arc surface 151 includes a plane and arc surfaces located at both ends of the plane. The support member 150 in this embodiment has a larger volume than the column-shaped support member 150 in Embodiment 1 and Embodiment 2, which can improve the rigidity of the elastic member 120. The size of the suspending element 130 and the smaller dimension perpendicular to the first direction limit the swinging direction of the suspension element 130 , so that the suspension element 130 can swing in a preset direction.

The brush head assembly 100 of the present application is provided with an intermediate soft layer (elastic member 120 ), which is not only compatible with the comfort of the toothbrush, and is provided with a support point (support member 150 ) in the middle, and can also appropriately adjust the angle according to the different tooth types of users, and the brushing coverage area bigger.

Claims

A brush head assembly (100), comprising:

a neck (110), the neck (110) has a first connecting surface (111);

an elastic member (120), the elastic member (120) is at least partially disposed on the first connecting surface (111);

A suspension member (130), disposed on the side of the elastic member (120) away from the first connection surface (111);

an oral cleaning member (140) partially disposed within the suspension member (130); and

At least one supporting member (150) is accommodated in the elastic member (120) and is located between the first connecting surface (111) and the suspension member (130), when the suspension member (130) is subjected to an external force At least one of the support members (150) can be squeezed, and at least one of the support members (150) can abut on the first connecting surface (111) and change the relationship between the suspension member (130) and the first connection surface (111). the included angle of the connecting surface (111);

The elastic moduli of the neck portion (110), the suspension element (130) and the support element (150) are all greater than the elastic moduli of the elastic element (120).
The brush head assembly according to claim 1, wherein the first connecting surface (111) has a first axis parallel to the first direction (X), and the axis of the suspension (130) is in the first axis The orthographic projection on the connection surface (111) coincides with the first axis, the support member (150) is arranged along the first direction (X), and the support member (150) is on the first connection surface (111) The orthographic projection on is on the first axis.
The brush head assembly according to claim 2, wherein the support member (150) is suspended between the first connection surface (111) and the suspension member (130).
The brush head assembly according to claim 2, wherein one end of the support member (150) is fixedly connected with the first connection surface (111).
The brush head assembly according to claim 4, wherein one end of the support member (150) away from the first connecting surface (111) has a circular arc surface (151), and the circular arc surface (151) is directed toward the One side away from the first connecting surface (111) is convex.
The brush head assembly according to claim 5, wherein the number of the support member (150) is one, the support member (150) is cylindrical, and the arc surface (151) abuts against the suspension member (130) is close to the middle of one side of the first connecting surface (111).
The brush head assembly according to claim 5, wherein the number of the support members (150) is two, the support members (150) are cylindrical, and the arc surface (151) abuts against the suspension The piece (130) is close to the side of the first connecting surface (111).
The brush head assembly according to claim 5, wherein the number of the supporting member (150) is one, the supporting member (150) comprises a connecting plate (152) extending along the first direction (X), the The connecting plate (152) is connected to the first connecting surface (111), and the circular arc surface (151) is formed at an end of the connecting plate (152) away from the first connecting surface (111).
The brush head assembly according to any one of claims 1 to 8, wherein the elastic member (120) is sleeved on the neck portion (110).
An electric toothbrush (10), comprising:

The brush head assembly (100) of any of claims 1-9; and

A handle (200) is connected to the neck (110), the handle (200) is capable of generating mechanical stimulation and transmitting the mechanical stimulation to the neck (110).