Toothbrush head and electric toothbrush

Abstract

The utility model provides a toothbrush head and an electric toothbrush, the toothbrush head comprises a brush rod and a brush head, and the brush head comprises a bristle planting plate, bristles and soft rubber; the bristle planting plate is provided with a first part and a second part which are opposite in the length direction, the second part and the brush rod are integrally formed in an injection mode and serve as a first main body part of the brush head, and the bristle planting plate is further provided with a third part and a fourth part in the width direction. At least one of the first part, the third part and the fourth part and the first main body part are arranged in a split mode and connected through a connecting piece, the thickness of the connecting piece is L2, the thickness of any one of the first part, the third part and the fourth part is L1, the ratio range of L2 to L1 is 1: 2-1: 7, and the connecting piece within the thickness ratio range is 1: 2-1: 7. The toothbrush head has good connection strength and free activity, the toothbrush head can be dynamically attached to teeth during working, the cushioning effect of the toothbrush head is effectively improved, damage to gingiva during tooth brushing is prevented, the oral cavity of a user is effectively protected, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of oral health, and in particular to a toothbrush head and an electric toothbrush. Background Art

[0002] In the prior art, the bristle plates of electric toothbrush heads are typically made of hard rubber. To improve the user experience and prevent the hard bristle plates from colliding with the oral cavity and causing discomfort, these plates are often wrapped with an elastic, soft rubber material. However, existing elastic, soft rubber toothbrush heads cannot adapt to the shape of teeth and can easily damage gums, causing bleeding. Summary of the Invention

[0003] The purpose of the utility model is to address the deficiencies of the existing technology and to provide a toothbrush head and an electric toothbrush that are easier to fit the tooth surface and effectively protect the user's oral cavity.

[0004] In a first aspect, the utility model provides a toothbrush head, comprising:

[0005] Brush rod;

[0006] The brush head includes a bristle plate, bristles and soft rubber;

[0007] A hair planting plate, with hair planting holes on the front side, the hair planting plate having a first part and a second part opposite to each other in the length direction, the second part being integrally injection-molded with the brush rod and forming the first main body of the brush head, the hair planting plate further having a third part and a fourth part in the width direction, at least one of the first part, the third part and the fourth part being separately provided with the first main body and connected with a connector, the thickness of the connector being L2, the thickness of any one of the first part, the third part and the fourth part being L1, and the ratio of L2 to L1 being in the range of 1:2-1:7;

[0008] Bristles are disposed in the hair-planting pores; and

[0009] Soft glue, the soft glue completely or partially wraps the connecting piece, and the soft glue wraps the outer peripheral surface and at least part of the back surface of the hair planting plate.

[0010] In a specific embodiment, at least one of the first part, the third part and the fourth part has a high degree of mobility, the first main body is connected to the handle of the electric toothbrush, the first main body can effectively transmit the intensity of the vibration force, has a high cleaning power, and can effectively clean and whiten teeth. The thickness of the connecting part and the thickness of any one of the first part, the third part and the fourth part have a ratio in the range of 1:2-1:7. The connecting part within this thickness ratio range has both good connection strength and free mobility. The intensity of the transmitted vibration is small, but it has a larger amplitude, which can better adapt to the shape of the teeth, and can effectively improve the shock-absorbing effect of the toothbrush head to prevent damage to the gums when brushing teeth.

[0011] Furthermore, the first part, the third part and the fourth part are respectively arranged separately from the first main body and connected by connecting parts. There are glue-filled gaps between the separate parts, and the soft glue completely or partially wraps the connecting parts and fills the glue-filled gaps. Since the first part, the third part and the fourth part are respectively located on both sides and the top of the toothbrush head, they can contact the gum part of the teeth and the innermost end of the teeth, thereby effectively cleaning the gums and the innermost ends of the teeth.

[0012] Furthermore, the first part and the second part are integrally injection molded with the brush rod to form the second main body of the brush head. The third part and the fourth part are separately arranged between the second main body and are connected by connecting parts. There is a glue-filled gap between each split part. The soft glue completely or partially wraps the connecting part and fills the glue-filled gap. The setting of the second main body facilitates the positioning of the hair planting plate during the brush head processing, improves the installation accuracy of the hair planting plate, and thereby improves the production efficiency of the brush head.

[0013] Furthermore, the bristle planting plate also includes a middle part, the first part and the middle part are separately arranged and connected by a connecting piece, the middle part and the first main body are separately arranged and connected by a connecting piece, there is a glue-filled gap between each part, and the soft glue completely or partially wraps the connecting piece and fills the glue-filled gap. The three-section design of the bristle planting plate facilitates the dynamic fit of the brush head with the teeth during work, making it easier to penetrate into the gaps between the teeth and improving the cleaning effect.

[0014] Furthermore, the ratio of the thickness of the connecting member to the thickness of the second main body is in the range of 1:4-1:10. The thickness of the second main body is greater than the thickness of the adjacent split body, which makes the second main body have higher strength and can effectively reduce the probability of breakage between the connecting member and the second main body, so that the brush head has a longer service life.

[0015] Furthermore, a drainage structure is formed between the front of the hair grafting board and the soft rubber. The drainage structure includes a drainage channel and a drainage port. The drainage channel can prevent liquid from remaining on the hair grafting board. The design of the drainage port makes it easier for the fluid to discharge from the hair grafting board, preventing the growth of bacteria on the hair grafting surface, and providing reliable protection for the user's dental health.

[0016] Furthermore, the connecting piece is located in the middle or on both sides of the adjacent parts. The position of the connecting piece can be set according to design requirements. While ensuring the strength of the connection, the force balance during brushing must also be considered to avoid breakage of the connecting piece.

[0017] Furthermore, a first arc-shaped groove is provided on the back of the bristle-grafting plate, and a second arc-shaped groove is provided on the back wrapped with soft rubber, which is consistent with the shape of the first arc-shaped groove. Since the bristle-grafting plate has a certain thickness, and the rubber wrapping on the back of the bristle-grafting plate also requires a certain thickness, the overall thickness of the bristle-grafting plate is relatively large, which can easily cause discomfort to the user when brushing teeth. The utility model can reduce the overall thickness of the brush head and improve the comfort of the user when brushing teeth by providing a first arc-shaped groove on the back of the bristle-grafting plate and a second arc-shaped groove on the back of the soft rubber wrap.

[0018] Furthermore, a cut surface is provided at one end of the brush rod close to the soft rubber. The cut surface is located on the front and / or back of the brush rod. The cut surface fits the soft rubber. The surface of the cut surface is smooth and curved, which is conducive to forming a smooth wall surface at the junction of the cut surface and the soft rubber, greatly reducing the occurrence of burrs at the junction, which is conducive to the injection molding of the soft rubber.

[0019] In a second aspect, the present invention further provides an electric toothbrush comprising the toothbrush head described in any one of the above items.

[0020] The utility model provides a toothbrush head and an electric toothbrush, wherein the first part, the third part and the fourth part have a high degree of mobility, and the ratio of the thickness of the connecting piece to the thickness of the first part, the third part and the fourth part is in the range of 1:2-1:7. The connecting piece within this thickness ratio range has both good connection strength and free mobility. Different from the prior art in which the bristles and the toothbrush head are hard-connected, the toothbrush head has both hard and soft connections, which facilitates the dynamic fit of the brush head to the teeth during operation, effectively improves the shock-absorbing effect of the toothbrush head, prevents damage to the gums when brushing, effectively protects the user's oral cavity, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a front view of a toothbrush head according to an embodiment of the present invention;

[0023] Figure 2 This is a side view of a brush head according to an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional schematic diagram of a hair planting plate according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic structural diagram of the hair planting plate in Example 1;

[0026] Figure 5 This is a schematic structural diagram of the hair planting plate in Example 2;

[0027] Figure 6 This is a schematic structural diagram of the hair planting plate in Example 3;

[0028] Figure 7 Schematic diagram of the structure of the hair planting plate in Example 4;

[0029] Figure 8 Schematic diagram of the structure of the hair planting plate in Example 5;

[0030] Figure 9 This is a schematic diagram of the brush head in Example 1. Figure 1 ;

[0031] Figure 10 This is a schematic diagram of the brush head in Example 2 Figure 2 ;

[0032] Figure 11 This is a schematic diagram of the back of the brush head in Example 2;

[0033] Figure 12 This is a schematic diagram of the front of the brush head in Example 2.

[0034] Among them, the figure marks in the figure are: 1000-toothbrush head; 100-brush rod; 101-section; 200-brush head; 201-first part; 202-second part; 203-third part; 204-fourth part; 205-first main body; 206-second main body; 207-middle part; 300-hair planting plate; 301-front; 3011-hair planting hole; 302-back; 3022-first arc-shaped groove; 303-connecting part; 304-center point; 400-bristles; 500-soft glue; 501-glue filling gap; 502-second arc-shaped groove; 600-drainage structure, 601-drainage channel; 602-drainage port; 603-arc-shaped water guide structure; 6031-water guide groove; 6032-water guide rib. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. 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 application, but rather merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0037] Hereinafter, the terms "including", "having" and their cognates used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the aforementioned items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the aforementioned items or adding the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the aforementioned items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0038] In this utility model, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, rotational connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] The following detailed description of some embodiments using a toothbrush head and an electric toothbrush as examples is provided below in conjunction with the accompanying drawings. The following embodiments and features therein may be combined with one another unless they conflict.

[0040] like Figures 1 to 3 As shown, a toothbrush head 1000 provided by an embodiment of the present invention is applied to an electric toothbrush (not shown in the figure), including a brush rod 100 and a brush head 200. The brush head 200 includes a hair-planting plate 300, bristles 400 and soft glue 500. The soft glue 500 is wrapped around the outer peripheral surface and at least part of the back surface of the hair-planting plate 300.

[0041] The thickness of the brush head 200 is L4, which has a value range of 3.5mm-8mm. Within this thickness range, on the one hand, the brush head has a thicker thickness to fix the bristles, which are not easy to fall off. On the other hand, the thickness of the brush head is not too large to cause a strong foreign body sensation during brushing, and it is difficult to move, affecting the comfort of brushing. The thickness can be 3.5mm, 3.92mm, 4.2mm, 4.6mm, 5.1mm, 5.35mm, 5.62mm, 6.0mm, 6.12mm, 6.35mm, 6.5mm, 6.63mm, 6.8mm, 7mm, 7.1mm, 7.2mm, 7.51mm, 7.77mm, 7.8mm or any other value among 8mm. Preferably, in this embodiment, the thickness of the brush head 200 is between 3.8mm and 7.8mm. This allows the brush head 200 to have a more appropriate overall thickness, which can reduce the foreign body sensation after the brush head 200 is placed in the user's mouth.

[0042] Combined together Figure 12 The bristle-planting plate 300 has a front side 301 with bristle-planting holes 3011 on the front side 301. The bristle-planting holes 3011 can be polygonal or other irregular shapes such as circular, triangular and square. The bristles 400 are arranged in the bristle-planting holes 3011. The bristle-planting plate 300 has a first part 201 and a second part 202 relative to each other in the length direction, and also has a third part 203 and a fourth part 204 in the width direction, wherein the second part 202 is integrally injection-molded with the brush rod 100 to form the first main body 205 of the brush head. At least one part of the first part 201, the third part 203 and the fourth part 204 is separated from the first main body 205 and connected with a connector 303. The connector 303 itself is elastic and can undergo elastic deformation. The connector 303 can be a thin sheet structure, a columnar structure or a dotted structure. The sheet-like structure can be a flat sheet, an arc-shaped sheet, a V-shaped sheet or an S-shaped sheet. Each structure has a similar effect, which can make the amplitude of the free-form bristles large, effectively cleaning the gaps between teeth without damaging the gums.

[0043] In the present invention, the thickness of the connecting member 303 is as follows: Figure 3 As shown in L2, the thickness of any one of the first portion 201, the third portion 203 and the fourth portion 204 is as follows: Figure 3 The ratio range of L1, L2 and L1 shown in the figure is 1:2-1:7. The connector within this thickness ratio range has good connection strength and free mobility, and the intensity of transmitted vibration is small, but it has a large amplitude. Different from the prior art in which the bristles and the toothbrush head are hard connected, the toothbrush head of this invention has both hard and soft connections, which can better adapt to the shape of the teeth, and can effectively improve the shock absorbing effect of the toothbrush head to prevent damage to the gums when brushing.

[0044] In addition, if Figure 3 As shown, the thickness of the second main body 205 is L3, and the ratio of L2 and L3 ranges from 1:4 to 1:10. The thickness of the second main body 205 is greater than the thickness of the adjacent split body, so that the second main body 205 has higher strength, which can effectively reduce the probability of breakage between the connecting piece 303 and the second main body 205, so that the brush head 200 has a longer service life.

[0045] like Figure 4 As shown, in Example 1, the first part 201, the third part 203 and the fourth part 204 are separately arranged between the first main body 205 and connected by a connecting piece 303. There is a glue-filled gap 501 between each split, and the soft glue 500 completely or partially wraps the connecting piece 303 and fills the glue-filled gap 501. The soft glue part 500 has a strong deformation ability. The first part 201, the third part 203 and the fourth part 204 have strong activity performance, so that when the brush head vibrates, it can have a larger vibration amplitude, which can not only increase the cleaning area, but also improve the brush head's cleaning ability for dead corners of the oral cavity.

[0046] like Figure 5 As shown, in Example 2, the first part 201 and the second part 202 are integrally injection-molded with the brush rod 100 to form the second main body 206 of the brush head. The third part 203 and the fourth part 204 are separately arranged from the second main body 206 and are connected by a connector 303. There is a glue-filled gap 501 between each split body. The soft glue 500 completely or partially wraps the connector 303 and fills the glue-filled gap 501. The setting of the second main body 206 facilitates the positioning of the hair-planting plate 300 during the processing of the toothbrush head, thereby improving the installation accuracy of the hair-planting plate 300 and improving the production efficiency of the toothbrush head 1000.

[0047] In addition, from Figure 5 It can be seen intuitively that the hair transplanting plate 300 is a symmetrical structure. The first part 201 and the second part 202 have vertical symmetry along the X-axis, and the third part 203 and the fourth part 204 have left-right symmetry along the Y-axis. The symmetrical setting can make the hair transplanting plate 300 evenly stressed, so as to reduce the probability of damage to the hair transplanting plate 300 and make the hair transplanting plate 300 have a longer service life.

[0048] It is understandable that the connector 303 can be set to be flush with the front face 301 of the hair-planting plate. In this case, the soft glue 500 is wrapped around the outer peripheral surface and the back face of the connector 303; the connector 303 can also be set to be slightly lower than the front face 301 of the hair-planting plate. At this time, the soft glue 500 completely wraps the connector 303, and the connector 303 cannot be directly observed on the surface of the brush head 200. Since the material of the soft glue 500 is relatively soft and prone to elastic deformation, it can play a good shock-absorbing role and effectively protect the user's oral cavity. The thickness range of the soft glue 500 is 0.5mm-2.5mm. The thickness of the soft glue 500 wrapped around the hair-planting plate 300 can be consistent, or it can be designed to be thicker in some areas and thinner in some areas. As long as the overall thickness of the soft glue 500 is in the range of 0.5mm-2.5mm, it is within the protection scope of the present utility model.

[0049] like Figure 6 As shown, in Example 3, the first part 201 and the second part 202 are integrally injection-molded with the brush rod 100 to form the second main body 206 of the brush head. The third part 203 and the fourth part 204 are respectively composed of two modules. The third part 203 and the fourth part 204 are separately arranged between the second main body 206 and are connected by a connector 303. There is a glue-filled gap 501 between each split, and the soft glue 500 completely or partially wraps the connector 303 and fills the glue-filled gap 501. The setting of the two modules makes the third part 203 and the fourth part 204 have higher flexibility and a larger vibration amplitude.

[0050] like Figure 7 As shown, in Example 4, the bristle implanting plate also includes a middle part 207, the first part 201 and the middle part 207 are separately arranged and connected by a connector 303, the middle part 207 and the first main body 205 are separately arranged and connected by a connector 303, and there is a glue-filled gap 501 between each split, and the soft glue 500 completely or partially wraps the connector 303 and fills the glue-filled gap 501. The three-section design of the bristle implanting plate 300 facilitates the dynamic fit of the brush head 200 with the teeth during work, making it easier to penetrate into the gaps between the teeth and improving the cleaning effect.

[0051] like Figure 8 As shown, in Example 5, the connection area between the third part 203, the fourth part 204 and the connecting member 303 is smaller than the connection area between the second main body 206 and the connecting member 303, that is, the cross-sectional area of the connecting member 303 becomes smaller and smaller from the second main body 206 to the outside. This structure can further enhance the degree of freedom of the third part 203 and the fourth part 204, and when the toothbrush head vibrates, its vibration amplitude is greater.

[0052] In the above five specific embodiments, the connecting member 303 is located in the middle or on both sides of the adjacent parts. The position of the connecting member 303 can be set according to design requirements. While ensuring the strength of the connection, the force balance during brushing must also be considered to avoid breakage of the connecting member 303.

[0053] In Example 1, Example 2, Example 3 and Example 5, the number of connectors 303 of the third part 203, the fourth part 204 and the brush head body is 2, which are located on both sides of adjacent parts, which can effectively ensure the strength of the connection.

[0054] It should be noted that the injection molding between the soft glue 500 and the hair transplanting plate 300 can be performed by secondary injection molding or two-color injection molding on the hair transplanting plate 300, and then the hair transplanting plate 300 is subjected to the hair transplanting process, or, when the melting point of the bristles is greater than the melting point of the soft glue 500, the hair transplanting process can be performed on the hair transplanting plate 300 first, and then the soft glue 500 can be injection molded on the hair transplanting plate 300. There is no specific restriction on this.

[0055] Shore hardness refers to the reading of the value measured by a Shore hardness tester. Its unit is degree. There are two description methods: A and D, which represent different hardness ranges. The hardness below 90 degrees is tested with a Shore A hardness tester and the data is obtained. The hardness of 90 degrees and above is tested with a Shore D hardness tester and the data is obtained.

[0056] In this embodiment, the Shore hardness of the soft glue 500 is Shore A hardness, and its hardness range is 35 to 45 degrees. In other embodiments, the hardness of the soft glue 500 can also be set to any other value of 36mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm or 45mm. Preferably, the toothbrush head in this embodiment uses a soft glue with a Shore A hardness of 40, which feels soft and has good elasticity. It can avoid a large force hitting the teeth during the change of brushing direction, and the customer experience is better. Among them, the soft glue 500 can be made of one or more of nitrile rubber (NBR), polysiloxane rubber, natural rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), silicone rubber, EPDM rubber and styrene butadiene rubber (SBR).

[0057] like Figure 9 and Figure 10As shown, a drainage structure 600 is formed between the front side 301 of the bristle plate 300 and the soft glue 500. The drainage structure includes a drainage channel 601 and a drainage port 602. The drainage channel 601 can prevent liquid from remaining on the bristle plate 300. The design of the drainage port 602 makes it easier for the fluid to be discharged from the bristle plate 300. After the user finishes brushing his teeth, the electric toothbrush is usually placed vertically. At this time, the fluid remaining in the bristle plate 300 can flow along the drainage channel 601 to the drainage port 602 under the action of gravity, and can flow out of the bristle plate 300 through the drainage channel 601, so that the bristle plate 300 can be kept dry as much as possible, thereby preventing the growth of bacteria on the bristle plate 300 and providing reliable protection for the health of the user's teeth.

[0058] In addition, the brush head 200 also has a center point 208, and the bristles of the first part 201 and the bristles of the second part 202 have rotational symmetry around the center point 208, and the bristles of the third part 203 and the bristles of the fourth part 204 have rotational symmetry around the center point 208. The rotationally symmetrical angled bristles can reduce the dependence on the brushing orientation and / or angle for optimal brushing performance, thereby improving the brushing performance.

[0059] like Figure 11 and Figure 12 As shown, the back side 302 of the bristle grafting plate 300 is provided with a first arc-shaped groove 3022, and the back side wrapped by the soft glue 500 has a second arc-shaped groove 502 which is consistent with the shape of the first arc-shaped groove 3022. Since the bristle grafting plate 300 has a certain thickness, and the glue 500 on the back side 302 of the bristle grafting plate also requires a certain thickness, it is easy to cause the overall thickness of the bristle grafting plate 300 to be large, and the user feels uncomfortable when brushing his teeth. The utility model can reduce the overall thickness of the brush head 200 by providing the first arc-shaped groove 3022 on the back side 302 of the bristle grafting plate and the second arc-shaped groove 502 on the back side wrapped by the soft glue, thereby reducing the foreign body sensation in the mouth, improving the comfort of the user when brushing his teeth, and improving the aesthetics of the toothbrush head, so that the toothbrush head has a streamlined appearance.

[0060] In addition, the first arc groove 3022 and the second arc groove 502 are fixed together to further improve the stability between the bristle planting plate 300 and the soft rubber 500, solving the problem of insufficient bonding force between the soft rubber of the toothbrush head and the hard bristle planting plate.

[0061] A cut surface 101 is also provided at one end of the brush rod 100 close to the soft rubber 500. The cut surface 101 is located on the front and / or back of the brush rod. The cut surface 101 is in contact with the soft rubber 500. The surface of the cut surface 101 is smooth and curved, which is conducive to forming a smooth wall surface at the junction of the cut surface 101 and the soft rubber 500, greatly reducing the occurrence of burrs at the junction, which is conducive to the injection molding of the soft rubber 500.

[0062] like Figure 2 and Figure 11 As shown, the outer wall surface of the soft rubber 500 is provided with an arc-shaped water-guiding structure 603, which includes a water-guiding groove 6031 and a water-guiding rib 6032. After brushing, there are still a lot of water stains remaining on the brush head 200. The design of the water-guiding groove 6031 and the water-guiding rib 6032 can guide the water away from the brush head 200, preventing the toothbrush head from getting moldy or water stains from entering the bristle plate 300 through the gaps in the soft rubber 500.

[0063] In the present invention, the water guide groove 6031 and the water guide rib 6032 extend in a curved shape along the length direction of the brush head 200. In other embodiments, they may also extend in a straight line along the length direction of the brush head 200, both of which can play a role in guiding water.

[0064] The present invention also provides an electric toothbrush comprising the aforementioned toothbrush head 200. The specific structure of the toothbrush head 200 is described with reference to the above embodiments. Since the present electric toothbrush adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0065] The present utility model provides a toothbrush head and an electric toothbrush, wherein the first part, the third part and the fourth part have a high degree of mobility, and the ratio of the thickness of the connecting piece to the thickness of the first part, the third part and the fourth part is in the range of 1:2-1:7. The connecting piece within this thickness ratio range has both good connection strength and free mobility. Different from the prior art in which the bristles and the toothbrush head are hard-connected, the toothbrush head in this embodiment has both hard and soft connections, which facilitates the dynamic fit of the brush head to the teeth during operation, effectively improves the shock-absorbing effect of the toothbrush head, prevents damage to the gums when brushing, effectively protects the user's oral cavity, and improves the user experience.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A toothbrush head, characterized in that: include: Brush rod; A brush head, comprising a bristle-planting plate, bristles and soft rubber; A hair planting plate, wherein the front side of the hair planting plate has hair planting holes, the hair planting plate has a first part and a second part opposite to each other in the length direction, the second part is integrally injection-molded with the brush rod, and is the first main body of the brush head, the hair planting plate further has a third part and a fourth part in the width direction, at least one of the first part, the third part and the fourth part is separately provided with the first main body and connected with a connecting piece, the thickness of the connecting piece is L2, the thickness of any one of the first part, the third part and the fourth part is L1, and the ratio of L2 to L1 is in the range of 1:2-1:7; Bristles are arranged in the hair planting holes; as well as Soft glue, the soft glue completely or partially wraps the connecting piece, and the soft glue wraps the outer peripheral surface and at least a part of the back surface of the hair implantation plate.

2. The toothbrush head according to claim 1, wherein: The first part, the third part and the fourth part are separately arranged from the first main body and connected by the connecting piece. There is a glue-filled gap between the separate parts, and the soft glue completely or partially wraps the connecting piece and fills the glue-filled gap.

3. The toothbrush head according to claim 1, wherein: The first part and the second part are integrally injection-molded with the brush rod to form the second main body of the brush head. The third part and the fourth part are separately arranged between the second main body and are connected by the connecting piece. There is a glue-filled gap between the separate parts, and the soft glue completely or partially wraps the connecting piece and fills the glue-filled gap.

4. The toothbrush head according to claim 1, wherein: The hair planting plate also includes a middle part, the first part and the middle part are separately arranged and connected by the connecting piece, the middle part and the first main body are separately arranged and connected by the connecting piece, and there is a glue-filled gap between the above-mentioned parts, and the soft glue completely or partially wraps the connecting piece and fills the glue-filled gap.

5. The toothbrush head according to claim 3, characterized in that The ratio of the thickness of the connecting member to the thickness of the second main body is in the range of 1:4-1:

10.

6. The toothbrush head according to claim 1, characterized in that A drainage structure is formed between the front surface of the hair-planting plate and the soft glue, and the drainage structure includes a drainage channel and a drainage port.

7. The toothbrush head according to claim 1, characterized in that The connecting pieces are located in the middle or on both sides of the adjacent split bodies.

8. The toothbrush head according to claim 1, wherein: The back of the hair planting plate is provided with a first arc-shaped groove, and the back of the soft glue wrapped plate is provided with a second arc-shaped groove that is consistent with the shape of the first arc-shaped groove.

9. The toothbrush head according to claim 1, wherein: The end of the brush rod close to the soft rubber is further provided with a cut surface, and the cut surface is located on the front and / or back side of the brush rod.

10. An electric toothbrush, characterized in that: The toothbrush comprises a toothbrush head according to any one of claims 1 to 9.

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