Brush head and electric toothbrush

Abstract

The utility model provides a brush head and an electric toothbrush and relates to the technical field of oral cavity cleaning, the brush head comprises a brush head body and a soft rubber piece, the brush head body is provided with a head part and a rod part connected with the head part, the head part is used for fixing bristles, and the rod part is used for being matched with a brush handle assembly; wherein the back face of the head portion is concavely arranged to form a vibration reduction cavity, an elastic supporting piece is arranged in the vibration reduction cavity, the brush head body is sleeved with the soft rubber piece or formed with the soft rubber piece, and the soft rubber piece at least covers the back face of the head portion and completely covers the vibration reduction cavity. The elastic supporting piece is constructed to be at least partially connected with the inner wall of the soft rubber piece in an abutting mode so as to be matched with the soft rubber piece for vibration reduction. Therefore, the problem that an existing brush head coated with soft rubber is poor in vibration reduction effect is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oral cavity cleaning technical field, specifically, relate to a brush head and electric toothbrush. BACKGROUND

[0002] Electric toothbrushes can be divided into two types of rotation and vibration from their working principles. The rotating type of toothbrush rotates the circular brush head through the motor drive, and enhances the friction effect while performing the ordinary brushing action, but the rotating type of toothbrush has large force and large tooth wear, and is not recommended for long-term use. Therefore, the vibration type of electric toothbrush is more popular with consumers, and the high-frequency oscillating brush head can efficiently complete the action of washing and brushing teeth. Among them, the oscillation amplitude of the vibration type of brush head is generally about 5 millimeters up and down, and the largest swing range in the industry is 6 millimeters. When users brush their teeth, the brush head often hits the teeth or gums, which brings an uncomfortable experience to the users.

[0003] Therefore, more and more brush heads reduce the vibration when the brush head collides with the user by coating soft glue, such as the brush head of the electric toothbrush disclosed in Chinese patent CN215651691U, which comprises a brush head body and a soft glue sleeve. The head of the brush head body is used to fix the bristles. The soft glue sleeve at least partially covers the head of the brush head body to protect the teeth when the brush head collides with the teeth. The soft glue sleeve is an injection molding part, and the soft glue sleeve and the brush head body are formed into an integral part by injection molding. In this scheme, the soft glue sleeve at least partially covers the head of the brush head body, and when the head of the brush head collides with the teeth, the soft glue sleeve between the brush head body and the teeth can play a role in reducing vibration. But limited by the height of the brush head, if the coating thickness of the soft glue is too thick, it will cause the height of the brush head to be too high, which is not convenient to stretch into the oral cavity for use, and the coating thickness of the soft glue is too small and cannot play the expected vibration reduction effect.

[0004] In summary, the existing soft glue coated brush head has poor vibration reduction effect. UTILITY MODEL CONTENT

[0005] The utility model discloses a brush head, simple structure aims at improving the problem of poor vibration reduction effect of the existing soft glue coated brush head.

[0006] The utility model adopts the following schemes:

[0007] A brush head comprises a brush head body and a soft rubber part, the brush head body has a head portion for fixing bristles and a stem portion for adapting with a brush handle assembly; wherein a back surface of the head portion is concavely formed to form a damping cavity, an elastic support is arranged in the damping cavity, the soft rubber part is sleeved or formed on the brush head body, the soft rubber part at least covers the back surface of the head portion and completely covers the damping cavity, and the elastic support is configured to at least partially abut against an inner wall of the soft rubber part to cooperate with the soft rubber part for damping.

[0008] As a further improvement, the elastic support comprises an elastic sheet arranged at an opening of the damping cavity and sealingly cooperating with the opening.

[0009] As a further improvement, the elastic support comprises an air bag, a shell of the air bag is made of soft rubber material, an inside of the air bag is filled with gas, and a natural height of the air bag is not greater than a height of the damping cavity.

[0010] As a further improvement, the height of the air bag is arranged to decrease from a middle portion to a periphery.

[0011] As a further improvement, the elastic support comprises an elastic sheet arranged at an opening of the damping cavity and an air bag arranged in the damping cavity, and a natural height of the air bag is not greater than a height from an inner wall of the elastic sheet to a bottom surface of the damping cavity.

[0012] As a further improvement, the elastic sheet is arranged as a plastic sheet and sealingly connected with the opening of the damping cavity by means of bonding or welding.

[0013] As a further improvement, the damping cavity is similar in shape to the back surface of the head portion and is provided with a stepped surface at the opening for limiting the elastic sheet.

[0014] As a further improvement, a positioning groove is concavely formed along a side surface of the head portion, the soft rubber part is integrally formed with the brush head body and at least partially embedded in the positioning groove.

[0015] Further provided is an electric toothbrush comprising a brush handle assembly and the brush head as claimed in any one of the above.

[0016] By adopting the above technical solution, the following technical effects can be achieved:

[0017] 1. The application is through the back of the head of the brush head body is concave damping cavity, and in the damping cavity is provided with elastic support, so that the back of the head and the tooth or gum knock when has greater elastic buffer force, thereby improving the damping effect, avoid to bring bad experience to the user. It is easy to understand that, in the same case of soft rubber piece wall thickness, the deformation of the soft rubber piece at the damping cavity of the application can be larger, so that the damping effect of the soft rubber piece is improved. At the same time, the elastic support in the damping cavity can produce elastic deformation when the brush head body and the user's tooth or gum knock, so as to further enhance the damping effect, thereby improving the user's experience. In other words, the application can greatly improve the damping effect when the knock occurs without changing the size of the brush head and the wall thickness of the soft rubber piece, and can better adapt to different brush head appearance. In addition, the elastic support can be set as a common part to reduce the manufacturing cost.

[0018] 2. The positioning groove is recessed along the side of the head, the soft rubber piece is integrally formed with the brush head body, and is at least partially embedded in the positioning groove. In order to increase the holding force of the soft rubber piece and the brush head body, and avoid the soft rubber piece from loosening. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 is a structural schematic diagram of one embodiment of the present application;

[0021] Figure 2 is a sectional view of one embodiment of the present application;

[0022] Figure 3 is a sectional view of another embodiment of the present application;

[0023] Figure 4 is a sectional view of another embodiment of the present application;

[0024] Figure 5 is a structural schematic diagram of the brush head body of one embodiment of the present application;

[0025] Figure 6 is a structural schematic diagram of the elastic sheet of one embodiment of the present application;

[0026] Figure 7 is a structural schematic diagram of the soft rubber piece of one embodiment of the present application.

[0027] Icon:

[0028] 1 - brush head body; 11 - head; 111 - bristles; 112 - damping cavity; 1121 - step surface; 113 - elastic sheet; 114 - air bag; 115 - first positioning groove; 116 - second positioning groove; 12 - rod; 121 - assembly hole;

[0029] 2 - soft rubber. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] EMBODIMENT

[0032] In conjunction with Figures 1 to 7 The present embodiment provides a brush head, which comprises a brush head body 1 and a soft rubber 2. The brush head body 1 has a head 11 and a rod 12 connected with the head 11. Specifically, the head 11 is used to fix bristles 111, and the surface on which the bristles 111 are fixed is defined as the front surface of the head 11. The rod 12 is used to adapt to a brush handle assembly. The back surface of the head 11 is concavely formed to form a damping cavity 112. An elastic support is arranged in the damping cavity 112. The soft rubber 2 is sleeved or formed on the brush head body 1. The soft rubber 2 at least covers the back surface of the head 11 and completely covers the damping cavity 112. The elastic support is configured to at least partially abut against the inner wall of the soft rubber 2 to cooperate with the soft rubber 2 to dampen.

[0033] Exemplarily, the front surface of the head 11 is provided with a bristle planting plate on which the bristles 111 are planted. The bristle planting plate can be integrally formed with the head 11 or separately provided and then welded and fixed with the head 11 after planting the bristles. No specific limitation is made. The damping cavity 112 is concavely arranged on the back surface of the head 11 and has a shape similar to that of the back surface. Preferably, the cross-sectional area of the damping cavity 112 accounts for at least two-thirds of the area of the back surface of the head 11, so that most of the back surface of the head 11 is in the damping cavity 112, thereby covering most positions where the brush head collides with the user. The material of the soft rubber piece 2 is preferably TPE, which is integrally injection molded with the brush head body 1 or separately formed and then sleeved on the brush head body 1. The soft rubber piece 2 can also be fixedly connected by means of dispensing glue.

[0034] It should be noted that in the present embodiment, the damping cavity 112 is concavely arranged on the back surface of the head 11 of the brush head body 1, and the elastic support is arranged in the damping cavity 112, so that the back surface of the head 11 has greater elastic buffering force when colliding with the teeth or gums, thereby avoiding bringing bad experience to the user. It can be easily understood that the soft rubber piece 2 can have greater elasticity under the condition of the same wall thickness. On the one hand, the deformation amount of the soft rubber piece 2 at the damping cavity 112 can be greater, so that the damping effect of the soft rubber is improved. On the other hand, the elastic support in the damping cavity 112 can be elastically deformed when the brush head body 1 collides with the teeth or gums of the user, so as to further enhance the damping effect and improve the experience of the user. In other words, the present application can greatly improve the damping effect when the collision occurs without changing the size of the brush head and the wall thickness of the soft rubber piece 2. The structure is more suitable for different brush head appearances. At this time, the elastic support can be provided as a common part to reduce the manufacturing cost.

[0035] In the present application, the implementation of the elastic support at least includes the following three kinds:

[0036] Implementation one: refer to Figure 2The elastic support member includes an elastic sheet 113 arranged at the opening of the damping cavity 112 and in sealing cooperation with the opening. The elastic sheet 113 can be a plastic sheet such as PVC, PET, etc., and is connected to the opening of the damping cavity 112 in sealing manner by bonding or welding. One side of the elastic sheet 113 is attached to the soft rubber piece 2, and the other side forms a sealed space with the damping cavity 112. When a collision occurs, the elastic sheet 113 deforms along with the soft rubber piece 2. The deformation of the elastic sheet 113 can be understood as elastic deformation of a point or multiple points. The deformation of the elastic sheet 113 and the soft rubber piece 2 improves the damping effect. For example, a stepped surface 1121 is arranged at the opening of the damping cavity 112 to limit the elastic sheet 113. The elastic sheet 113 is placed on the stepped surface 1121 to be limited. The periphery of the elastic sheet 113 can be sealed to the opening of the damping cavity 112 by applying glue on the stepped surface 1121 or arranging an ultrasonic welding rib. In other embodiments, the elastic sheet 113 can be an elastic steel sheet.

[0037] Embodiment two: refer to Figure 3 The elastic support member includes an air bag 114. The shell of the air bag 114 is made of soft rubber material such as TPR, and the inside of the air bag 114 is filled with gas. The natural height of the air bag 114 is not greater than the height of the damping cavity 112, so that the soft rubber piece 2 can deform towards the air bag 114. When the back of the head 11 hits the teeth or gums, the air bag 114 and the soft rubber piece 2 can provide sufficient elasticity to reduce the discomfort caused by vibration to the user. During installation, the air bag 114 can be placed in the damping cavity 112, and then the soft rubber piece 2 is sleeved on the brush head body 1. In one embodiment, the height of the air bag 114 is arranged to decrease from the middle to the periphery, so as to leave enough deformation space in the damping cavity 112, thereby ensuring the damping effect. In other embodiments, multiple small air bags 114 can be arranged in the damping cavity 112 to further improve the elasticity and buffer the impact of vibration on the user.

[0038] Embodiment three: refer to Figure 4 The elastic support member includes an elastic sheet 113 arranged at the opening of the damping cavity 112 and an air bag 114 located in the damping cavity 112. The natural height of the air bag 114 is not greater than the height from the inner wall of the elastic sheet 113 to the bottom surface of the damping cavity 112, so that the air bag 114 can jump slightly between the elastic sheet 113 and the damping cavity 112 to slow down the vibration of the brush head. At the same time, the elastic sheet 113 and the air bag 114 can both deform elastically to increase the deformation space of the soft rubber piece 2 and ensure the damping effect.

[0039] On the basis of the above-mentioned embodiments, in an optional embodiment of the utility model, the side of the head part 11 is concavely provided with a positioning groove, the soft rubber part 2 is integrally formed with the brush head body 1 and is at least partially embedded in the positioning groove. For example, the positioning groove can be provided with a plurality of positioning grooves along the thickness direction of the head part 11 to increase the holding force of the soft rubber part 2 and the brush head body 1, avoid the soft rubber part 2 from loosening, and can also be provided along the length direction of the head part 11 to avoid the soft rubber part 2 from falling off along the thickness direction. Preferably, a plurality of first positioning grooves 115 can be provided along the thickness direction near the bristles 111, and a second positioning groove 116 can be concavely provided along the length direction in the middle of the side, so as to ensure the stability of the connection between the soft rubber part 2 and the brush head body 1 and prevent the soft rubber part 2 from loosening. Preferably, the soft rubber part 2 covers the back and side of the head part 11 and a part of the rod part 12 near the head part 11, so that the soft rubber part 2 has sufficient adhesion with the brush head body 1, and at the same time, the part of the brush head body 1 extending into the oral cavity is covered by the soft rubber part 2, so as to avoid the user's teeth or gums from colliding with the rod part 12.

[0040] The utility model further provides an electric toothbrush, including brush handle subassembly and the brush head as any above described can be detachably configured on the brush handle subassembly. Exemplarily, the brush handle subassembly includes handle, support and driving motor, the support is fixed in the handle, the main part of driving motor is inserted in the support, and its output shaft is exposed on the top of handle, and the rod part 12 of brush head is provided with the assembly hole 121 for adapting connection with the output shaft, so that the brush head body 1 can be detachably configured on the brush handle subassembly, wherein the connecting structure of output shaft and assembly hole 121 is prior art, and will not be repeated here.

[0041] The above are only preferred embodiments of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments only, and any technical scheme under the idea of the utility model belongs to the protection scope of the utility model.

Claims

1. A brush head characterized in that, The brush head body has a head portion for fixing the bristles and a stem portion for adapting with the brush handle assembly; wherein a back surface of the head portion is concavely formed to define a damping cavity, and an elastic support is arranged in the damping cavity; the soft rubber member is sleeved or formed on the brush head body, and covers at least the back surface of the head portion and completely covers the damping cavity; the elastic support is configured to at least partially abut against an inner wall of the soft rubber member to cooperate with the soft rubber member for damping.

2. The brush head of claim 1, wherein, The elastic support comprises an elastic sheet arranged at an opening of the damping cavity and sealingly cooperating with the opening.

3. The brush head of claim 1, wherein, The elastic support comprises an air bag, a shell of the air bag is made of soft rubber material, and the air bag is filled with gas; a natural height of the air bag is not greater than a height of the damping cavity.

4. The brush head of claim 3, wherein, The height of the air bag is configured to decrease from a middle portion to a periphery.

5. The brush head of claim 1, wherein, The elastic support comprises an elastic sheet arranged at an opening of the damping cavity and an air bag arranged in the damping cavity; a natural height of the air bag is not greater than a height from an inner wall of the elastic sheet to a bottom surface of the damping cavity.

6. The brush head of claim 2 or 5, wherein, The elastic sheet is configured as a plastic sheet and sealingly connected with the opening of the damping cavity by means of bonding or welding.

7. The brush head of claim 6, wherein, The damping cavity is similar in shape to the back surface of the head portion and is provided with a stepped surface at the opening for limiting the elastic sheet.

8. The brush head of claim 1, wherein, A positioning groove is concavely formed along a side surface of the head portion; the soft rubber member is integrally formed with the brush head body and at least partially embedded in the positioning groove.

9. An electric toothbrush characterized by comprising: The brush head comprises the brush head body and the soft rubber member; the brush handle assembly comprises a brush handle and a brush head assembly; the brush head is detachably arranged on the brush handle assembly.

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