CN219020476U - Brush head and electric toothbrush - Google Patents

Abstract

Embodiments of the present application provide a brush head and an electric toothbrush, the brush head including TPEE bristles and TPEE brush plates. The TPEE bristles have opposite free ends and connecting ends; the TPEE brush plate is connected with the connecting end of the TPEE brush hair, and the TPEE brush plate and the TPEE brush hair are of an integrated structure, and the free end of the TPEE brush hair extends out from the surface of the TPEE brush plate. TPEE bristles made of TPEE materials have excellent elastic deformation capability, soft touch and good taste during brushing teeth; because the TPEE brush hair and the TPEE brush board are integrally injection molded, the hair area occupation ratio can be improved, and the TPEE brush board can be made thinner, thereby improving the comfort of users during brushing teeth.

Description

Brush head and electric toothbrush

Technical Field

The application relates to the technical field of oral care, in particular to a brush head and an electric toothbrush.

Background

In the related art, the process of mounting bristles on a brush plate of a brush head is called a bristle planting process, and the bristle planting process of the brush head comprises a copper bristle planting process and a copper-free bristle planting process. For the copper bristle planting process, the bottom of the bristle planting hole also has a certain thickness, so that the bristle planting hole is prevented from being perforated or cracked, and in the copper bristle planting process, as the brush plate has a certain thickness, one end of the brush hair, which is close to the bottom support of the brush plate, needs to be sintered and melted to be combined with the bottom support, and the bottom support itself also needs to have a certain thickness, so that the whole thickness of the brush plate is large, and the uncomfortable brushing of a user is easily caused by the large thickness of the brush plate.

Disclosure of Invention

The application provides a brush head and electric toothbrush, can reduce the thickness of brush board, improves the travelling comfort when the user brushes teeth.

A first aspect of embodiments of the present application provides a brush head comprising:

TPEE bristles having opposed free and connected ends; the method comprises the steps of,

the TPEE brush plate is connected with the connecting ends of the TPEE bristles, the TPEE brush plate and the TPEE bristles are of an integrated structure, and the free ends of the TPEE bristles extend from the surface of the TPEE brush plate.

Further, the shore D hardness of the TPEE bristles is greater than or equal to 60 and less than or equal to 90;

the Shore D hardness of the TPEE brush plate is more than or equal to 65 and less than or equal to 85;

wherein the difference between the Shore D hardness of the TPEE bristles and the Shore D hardness of the TPEE brush plate is not more than 10.

Further, the shore D hardness of the TPEE bristles is greater than the shore D hardness of the TPEE brush plate.

Further, the melting point of the TPEE bristles is higher than the melting point of the TPEE brush plate.

Further, along the thickness direction of the TPEE brush plate, the depth of the connecting end embedded into the TPEE brush plate is more than or equal to 0.5mm.

Further, the ratio of the depth of the connecting end embedded into the TPEE brush plate to the thickness of the TPEE brush plate is 0.2 or more and 0.8 or less.

Further, along the thickness direction of the TPEE brush plate, the TPEE brush plate has a bristle planting surface and a back surface opposite to each other, the free ends of the TPEE bristles extend out from the bristle planting surface, and the distance between the connection end embedded in the TPEE brush plate and the back surface is greater than or equal to 0.2mm and less than or equal to 2mm.

Further, the TPEE brush plate has a bristle surface at which free ends of the TPEE bristles extend, and a distance between the TPEE bristles and an edge of the bristle surface is 0.2mm or more and 2mm or less.

Further, the length of the TPEE bristle is more than or equal to 6.5mm and less than or equal to 14mm.

Further, the TPEE brush plate has a bristle surface at which free ends of the TPEE bristles extend, the TPEE bristles comprising a plurality of bristle tufts, each bristle tuft comprising a plurality of brush filaments, the brush head further comprising:

and the constraint rings are in one-to-one correspondence with the bristle clusters and are sleeved on the root parts of the corresponding bristle clusters, which are close to the bristle planting surfaces, so as to constrain a plurality of brush filaments to form the bristle clusters.

Further, the constraint ring is connected with the TPEE brush plate, and the constraint ring is convexly arranged on the hair planting surface; and/or

The connecting end of the bristle cluster penetrates out of the constraint ring to be connected with the TPEE brush plate; and/or

The constraint ring is a TPEE constraint ring, and the whole formed by the TPEE constraint ring and the bristle tufts is integrally injection molded with the TPEE brush plate.

Further, the TPEE bristles include a plurality of bristle tufts, each bristle tuft including a plurality of bristles, and a spacing between adjacent bristle tufts is 0.3mm or more and 3.5mm or less.

Further, the TPEE bristles include a plurality of bristle tufts, each of the bristle tufts including a plurality of bristles, a single bristle having a diameter of 0.07mm or more and 0.25mm or less, and/or a single bristle tuft including a number of bristles of 40 or more and 300 or less.

Further, the TPEE bristle includes a plurality of bristle tufts, each bristle tuft including a plurality of brush filaments, and a cross-sectional shape of the TPEE bristle tuft is configured to be at least one of arc, circle, triangle, oblong, five-pointed star, ellipse, quadrangle, and pentagon in a cross-section perpendicular to a thickness direction of the TPEE brush plate.

Further, the TPEE brush plate is a hard brush plate or a soft brush plate.

Further, the TPEE brush plate includes:

The hair-planting part is provided with a hair-planting surface, and the free ends of the TPEE bristles extend out of the hair-planting surface;

and the bottom support part is connected to one side of the hair planting part, which is away from the TPEE bristles, or embedded in the hair planting part, and one of the bottom support part and the hair planting part is a hard part. The other is a soft part.

Further, the brush head further comprises:

and the brush rod is connected with one end of the TPEE brush plate in the length extending direction, and the brush rod is a TPEE brush rod.

Further, the whole brush rod is a hard brush rod or a whole soft brush rod; or alternatively

The brush rod comprises a soft section and a hard section which are arranged along the length extending direction, and the soft section is connected with the hard section and one end of the TPEE brush plate along the length extending direction; or alternatively

The brush rod comprises a plurality of soft parts and a plurality of hard parts which are alternately connected in sequence along the length extending direction, and one end of the TPEE brush plate along the length extending direction is connected with the hard parts or the soft parts; or alternatively

The brush rod comprises a hard rod and a soft sleeve, and the soft sleeve is sleeved on the hard rod.

A second aspect of the present application provides an electric toothbrush comprising a handle and a head as claimed in any one of the preceding claims, the head being detachably connected to the handle.

The brush head and the electric toothbrush provided by the embodiment of the application have the advantages that the TPEE brush hair made of the TPEE material has excellent elastic deformation capability, namely high rebound resilience, and the touch sense of the TPEE brush hair is soft and smooth, so that the TPEE brush hair has good taste during brushing teeth. And because the TPEE brush hair and the TPEE brush board are of an integrated structure, the TPEE brush board is not required to be perforated, and the TPEE brush board can be prevented from being perforated or cracked, so that the distance between two adjacent clusters of brush hair in the TPEE brush hair can be reduced, and the distance between the TPEE brush hair and the edge of the TPEE brush board can be reduced, thereby improving the hair area ratio. The improvement of the hair area ratio means that more TPEE bristles can be arranged on the same area of the TPEE brush plate, so that higher density hair planting is realized, the number of the TPEE bristles is more compared with that of the low density hair planting, the contact area with teeth is larger, and the plaque removing effect is better. Meanwhile, the high-density bristles can uniformly disperse the pressure born by the gums during tooth brushing, in other words, the increase of the number of the TPEE bristles in unit area can reduce the pressure born by a single brush wire in each group of TPEE bristles, so that the pressure stimulus to the teeth and gums is dispersed. And because the TPEE brush plate is required to be perforated or cracked, the thickness of the TPEE brush plate can be reduced, and the comfort of a user during brushing teeth is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the structure of a toothbrush in one embodiment of the present application;

FIG. 2 is a schematic view of a brush head according to an embodiment of the present application;

FIG. 3 is a schematic view of the brush head of the embodiment of FIG. 2 from another perspective;

FIG. 4 is a schematic partial cross-sectional view of the brush head of the embodiment of FIG. 3 taken along section A-A;

FIG. 5 is a flow chart of a method of manufacturing a brush head according to an embodiment of the present disclosure;

FIG. 6 is a flow chart of a method of manufacturing a brush head according to another embodiment of the present disclosure;

FIG. 7 is a flow chart of a method of manufacturing a brush head according to another embodiment of the present disclosure;

FIG. 8 is a flow chart of a method of manufacturing a brush head according to another embodiment of the present disclosure;

fig. 9 is a flow chart illustrating a method for manufacturing a brush head according to another embodiment of the present disclosure.

Description of the drawings: 1-a toothbrush; 10-brushing head; 20-a brush handle; 11-TPEE brush plate; 111-a hair-planting part; 112-a shoe portion; 12-TPEE bristles; 12 a-free end; 12 b-a connection end; 12 c-a hair-planting surface; 12 d-back; 121-bristle tufts; 13-a confinement ring; 14-brush bar.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Referring to fig. 1, a toothbrush 1 according to an embodiment of the present application may be an electric toothbrush (as shown in fig. 1) or a manual toothbrush. The toothbrush 1 comprises a handle 20 adapted to be held and a head 10 for cleaning the mouth of a user, the head 10 being detachably connected to the handle 20, thereby facilitating replacement of the head 10.

Referring to fig. 2-3, in one embodiment, a brush head 10 includes a TPEE brush plate 11 and TPEE bristles 12 disposed on the TPEE brush plate 11.

TPEE, which may also be referred to as a thermoplastic elastomer, is a block-type polymer material in which both soft and hard segments are present. TPEE is a block copolymer consisting of hard segments of aromatic polyesters and soft segments of aliphatic polyesters or polyethers. The hard segments are composed of a plurality of short chain ester linkages and the soft segments are composed of polyether or uncrystallized polyester. The elastic rubber integrates the dual performances of rubber and common plastic, not only has the elasticity of the rubber, but also has the processing performance and mechanical performance of the plastic, and the elastic resilience performance similar to the rubber can be obtained by simple plastic molding processing. The soft segment structure in TPEE provides material flexibility, while the crosslinking action of the hard segment plasticizes and shapes it while exhibiting the strength of the material. The shore D hardness of TPEE can be varied between 32-100 with elasticity and strength between rubber and plastic by adjusting the ratio of the hard and soft segments.

The TPEE bristles 12 are formed by drawing TPEE material into contact with the user's teeth to clean the user's teeth; the TPEE bristles 12 may comprise a plurality of filaments, the filaments being filaments. The TPEE bristles 12 have opposite free ends 12a and connecting ends 12b, the free ends 12a of the TPEE bristles 12 being adapted to contact the teeth of the user and the connecting ends 12b of the TPEE bristles 12 being adapted to connect with the TPEE brush plate 11. The TPEE bristles 12 wire-drawn using TPEE material have excellent elastic deformability, i.e., high resiliency, and the TPEE bristles 12 feel soft and pliable, having good mouthfeel when brushing teeth.

The TPEE brush plate 11 is injection molded by TPEE material for carrying the TPEE bristles 12, the TPEE brush plate 11 is provided in a plate shape, the TPEE brush plate 11 is connected with the connection end 12b of the TPEE bristles 12 while injection molding, so that the TPEE brush plate 11 and the TPEE bristles 12 are integrally molded, that is, the TPEE brush plate 11 and the TPEE bristles 12 are integrally molded, the free end 12a of the TPEE bristles 12 extends from the surface of the TPEE brush plate 11 to contact with the teeth of the user, and the teeth of the user are cleaned. Since the TPEE bristles 12 and the TPEE brush plate 11 in the embodiment are made of TPEE materials, the bonding force between the TPEE bristles 12 and the TPEE brush plate 11 after the same material is integrally injection molded is stronger, and the TPEE bristles 12 and the TPEE brush plate 11 are not easy to separate.

In the conventional copper-bearing bristle planting process, a metal sheet needs to be driven into the bristle planting holes of the brush plate at a high speed so as to pin bristles on the brush plate through the metal sheet. Compared to the conventional copper-based bristle planting process, the brush head 10 of the embodiment of the present application uses a copper-free bristle planting process, which has at least the following advantages:

the brush head 10 manufactured by the first copper-free hair-planting process does not contain metal sheets, so that the problem of metal oxidation is avoided, and the inlet is healthier and more safe;

the brush head 10 manufactured by the second and copper-free bristle planting process is more changeable in shape than the brush head manufactured by the traditional copper bristle planting process, and the brush head manufactured by the traditional copper bristle planting process basically implants bristles into round implanted pores with consistent sizes; by adopting the copper-free bristle planting process, the special-shaped bristles, such as bristles with various patterns of triangular, diamond, circular and the like cross sections, can be arranged more freely, so that the aesthetic degree of the brush head 10 is improved;

third, the copper-free bristle setting process may employ a first bristle grinding and then bristle setting process, and the rounding rate of the TPEE bristles 12 may be higher than that of bristles manufactured by the copper bristle setting process.

In addition, there is also a conventional copper-free tufting process in the related art, which adopts an ATF (anchor-finishing) process, and after one end of the bristles is passed through a through hole formed in the brush plate, the roots of the bristles are melted to be adhered to the brush plate.

The conventional copper-based hair-planting process and the conventional copper-free hair-planting process have the following problems:

the first, bristle field ratio (bristle field ratio: bristle area to brush plate area) is lower. Specifically, in the copper bristle planting process, as the metal sheet is required to be driven into the bristle planting holes of the brush plate at high speed, the bristles are nailed on the brush plate through the metal sheet; in order to avoid the cracking of the brush plate, a certain gap is required to be kept between the implanted holes, and a certain distance is required to be kept between the edge of the implanted holes and the edge of the brush plate so as to ensure the connection strength between the brush hair and the brush plate. In addition, the bristles are implanted into single brush pores, and the ratio of the area of the single bristles to the area of the implanted pores on the brush plate is also relatively low, so that the overall bristle area ratio (the ratio of bristle area to brush plate area) is relatively low. Similarly, for the traditional copper-free hair-planting technology, on one hand, the brush plate comprises a collet and a hair-planting plate arranged in a mounting cavity of the collet, a certain distance is reserved between bristles and the edge of the hair-planting plate, the hair-planting plate is arranged on the mounting cavity of the collet, and a certain distance is reserved between the edge of the collet and the inner wall of the mounting cavity, so that the whole hair area is relatively low.

Second, the brush plate thickness is thicker. Specifically, for the copper-free bristle planting process, the bottom of the bristle planting hole is also provided with a certain thickness to prevent the bristle planting hole from being perforated or cracked, and for the traditional copper-free bristle planting process, as the brush plate is provided with a certain thickness, and one end of the bristle close to the collet needs to be sintered and melted to be connected with the collet, the collet itself also needs to be provided with a certain thickness, so that the whole thickness of the brush plate is large, and the thickness of the brush plate is large, so that the user is easy to brush teeth uncomfortable.

Compared with the copper-based bristle planting process and the traditional copper-free bristle planting process, in the embodiment of the application, because the TPEE bristles 12 and the TPEE brush plate 11 are integrally injection molded, holes are not required to be formed in the TPEE brush plate 11, the TPEE brush plate 11 can be prevented from being perforated or cracked, therefore, the distance between two adjacent clusters of bristles in the TPEE bristles 12 can be reduced, and the distance between the TPEE bristles 12 and the edges of the TPEE brush plate 11 can be reduced, so that the bristle area ratio is improved. The increase of the bristle area ratio means that more TPEE bristles 12 can be arranged on the same area of the TPEE brush plate 11, so that higher density bristle planting is realized, the number of the TPEE bristles 12 is more compared with that of low density bristle planting, the contact area with teeth is larger, and the plaque removing effect is better. Meanwhile, the high-density bristles can uniformly disperse the pressure born by the gums during brushing, in other words, the increase of the number of the TPEE bristles 12 in unit area can reduce the pressure born by a single brush wire in each group of TPEE bristles 12, so that the pressure stimulus to the teeth and gums is dispersed. And because the TPEE brush plate 11 is broken or cracked without consideration, the TPEE brush plate 11 can be made thinner, i.e., the thickness of the TPEE brush plate 11 can be reduced, thereby improving the comfort of the user in brushing teeth.

In some embodiments, the TPEE bristles 12 have a shore D hardness of 60 or more and 90 or less, so that the TPEE bristles 12 have both a relatively good compliance, improved comfort when in contact with teeth, and a relatively good hardness, improving effectiveness of brushing. When the shore D hardness of the TPEE bristles 12 is less than 60, the TPEE bristles 12 are too low in hardness, and the TPEE bristles are easily lodged directly on the teeth during brushing, which is not beneficial to tooth cleaning. When the shore D hardness of the TPEE bristles 12 is greater than 90, the TPEE bristles 12 are too stiff, are easily uncomfortable for the user when in direct contact with the teeth gums, and easily damage the teeth gums.

In some embodiments, the shore D hardness of the TPEE brush plate 11 is 65 or more and 85 or less, so that the TPEE brush plate 11 can be elastically deformed in a proper range during brushing, improving the comfort during brushing, and ensuring that the TPEE brush plate 11 has a proper hardness and strength to better support the TPEE bristles 12. When the shore D hardness of the TPEE brush plate 11 is less than 65, the TPEE brush plate 11 is too soft and is easily deformed, and the deformation amount is too large under the conventional brushing force, so that the TPEE bristles 12 on the TPEE brush plate 11 cannot be fully contacted with teeth, and the brushing effectiveness is reduced. When the shore D hardness of the TPEE brush plate 11 is greater than 85, the TPEE brush plate 11 is too hard, most of the deformation amount during brushing is borne by the TPEE bristles 12, and the deformation amount of the TPEE bristles 12 is too large and is easy to fall down.

In some embodiments, the difference between the shore D hardness of the TPEE bristles 12 and the shore D hardness of the TPEE brush plate 11 is not greater than 10, so that the flexibility and hardness of the TPEE bristles 12 and the TPEE brush plate 11 are relatively close, the deformation of the TPEE bristles 12 and the TPEE brush plate 11 is relatively close during brushing, the TPEE bristles 12 can make better contact with teeth, and when the difference between the shore D hardness of the TPEE bristles 12 and the shore D hardness of the TPEE brush plate 11 is greater than 10, for example, the shore D hardness of the TPEE bristles 12 is greater than the shore D hardness of the TPEE brush plate 11 and the difference between the two is greater than 10, the hardness of the TPEE bristles 12 is too hard to deform, the reaction force of the teeth can act on the softer TPEE brush plate 11 through the TPEE bristles 12, the deformation of the TPEE brush plate 11 is too great, resulting in separation of part of the TPEE bristles 12 from the teeth, resulting in reduced brushing efficiency. For another example, when the shore D hardness of the TPEE bristles 12 is smaller than the shore D hardness of the TPEE brush plate 11 and the difference between the two is greater than 10, the TPEE bristles 12 are too soft, and the TPEE brush plate 11 is not easily deformed relative to the TPEE bristles 12, and the TPEE bristles 12 are easily fallen down on the TPEE brush plate 11 when they are subjected to tooth forces, resulting in reduced brushing efficiency.

In addition, the hardness, melting point, soft segment additive and hard segment additive of TPEE material have the following relationship: the more soft segment additives, the lower the hardness of the TPEE material, the lower the melting point; the more hard segment additives, the higher the hardness of the TPE material and the higher the melting point. The difference between the Shore D hardness of the TPEE bristles 12 and the Shore D hardness of the TPEE brush plate 11 is limited to be not more than 10, so that the proportion of soft section additives and hard section additives in the TPEE bristles 12 and the TPEE brush plate 11 is not too great, the melting points of the TPEE bristles 12 and the TPEE brush plate 11 are relatively close, and in the process of injection molding the TPEE brush plate 11 by the TPEE material, part of the TPEE bristles 12 can be melted and combined with the liquid TPEE material, thereby improving the bonding force between the TPEE bristles 12 and the TPEE brush plate 11 and reducing the probability of the TPEE bristles 12 falling off from the molded TPEE brush plate 11. When the difference between the shore D hardness of the TPEE bristles 12 and the shore D hardness of the TPEE brush plate 11 is greater than 10, the difference in melting points between the TPEE bristles 12 and the TPEE brush plate 11 is too large, the TPEE bristles 12 are difficult to melt in the process of injection molding the TPEE brush plate 11 through the TPEE material, and cannot be fused with the liquid-state TPEE material of the TPEE brush plate 11, resulting in a decrease in the bonding force between the cured and molded TPEE brush plate 11 and the TPEE bristles 12.

In some embodiments, the shore D hardness of the TPEE bristles 12 is greater than the shore D hardness of the TPEE brush plate 11, and since the melting point of the TPEE material is in positive correlation with the hardness, the melting point of the TPEE bristles 12 is also greater than the melting point of the TPEE brush plate 11, so that the TPEE bristles 12 are not instantaneously melted and fused with the liquid TPEE material of the TPEE brush plate 11 to be difficult to mold during injection molding of the TPEE brush plate 11 by the TPEE material, and the TPEE bristles 12 are only partially dissolved, thereby ensuring smooth bonding of the TPEE bristles 12 with the TPEE brush plate 11 and smooth molding of the brush head 10.

Referring to fig. 3-4, in some embodiments, the TPEE brush plate 11 has a thickness direction B-B and a length extending direction C-C, the thickness direction B-B being perpendicular to the length extending direction C-C. Along the thickness direction B-B of the TPEE brush plate 11, the depth D1 of the connecting ends 12B of the TPEE bristles 12 embedded in the TPEE brush plate 11 is 0.5mm or more, so that the contact area of the connecting ends 12B with the TPEE brush plate 11 can be increased, and the binding force between the TPEE bristles 12 and the TPEE brush plate 11 can be improved. The depth D1 of the connecting end 12b of the TPEE bristle 12 embedded in the TPEE brush plate 11 is less than 0.5mm, the depth of the connecting end 12b embedded in the TPEE brush plate 11 is small, and the connecting end 12b is easily separated from the TPEE brush plate 11, resulting in the separation of the TPEE bristle 12 from the TPEE brush plate 11.

Referring to fig. 4, in some embodiments, the ratio of the depth D1 of the connecting end 12b embedded in the TPEE brush plate 11 to the thickness D2 of the TPEE brush plate 11 is greater than or equal to 0.2 and less than or equal to 0.8, so that the TPEE bristles 12 can have a deeper embedded depth on the TPEE brush plate 11, the bonding force between the TPEE bristles 12 and the TPEE brush plate 11 is improved, and the thickness of the TPEE brush plate 11 is made thinner. When the ratio of the depth D1 of embedding the connecting end 12b into the TPEE brush plate 11 to the thickness D2 of the TPEE brush plate 11 is less than 0.2, the implantation depth of the TPEE bristles 12 on the TPEE brush plate 11 is small, and the connecting end 12b is easily detached from the TPEE brush plate 11, resulting in detachment of the TPEE bristles 12 from the TPEE brush plate 11. When the ratio of the depth D1 of the tip-in TPEE brush plate 11 to the thickness D2 of the TPEE brush plate 11 is greater than 0.8, the thickness of the TPEE brush plate 11 is excessively thick, resulting in reduced comfort when the user brushes his teeth.

Referring to fig. 4, in some embodiments, along the thickness direction B-B of the TPEE brush plate 11, the TPEE brush plate 11 has opposite bristle planting surfaces 12c and back surfaces 12D, free ends 12a of the TPEE bristles 12 extend from the bristle planting surfaces 12c, and a distance D3 between the connecting ends 12B of the TPEE brush plate 11 and the back surfaces 12D is greater than or equal to 0.2mm and less than or equal to 2mm, so that a portion of the TPEE brush plate 11 located under the TPEE bristles 12 has high strength, is not easily broken, and can make the thickness of the TPEE brush plate 11 thinner. When the distance D3 between the connecting end 12b and the back 12D is smaller than 0.2mm, the part of the TPEE brush plate 11 positioned below the TPEE brush hair 12 is less in material consumption, lower in strength and easy to crack. When the distance between the connection end 12b and the rear surface 12d is greater than 2mm, the thickness of the TPEE brush plate 11 is excessively thick, resulting in reduced comfort when the user brushes his teeth.

Referring to fig. 3, in some embodiments, the distance D4 between the TPEE bristles 12 and the edge of the bristle planting surface 12c is greater than or equal to 0.2mm and less than or equal to 2mm, so that the TPEE bristles 12 and the edge of the TPEE brush plate 11 have a distance greater than 0.2mm, the connection stability between the TPEE bristles 12 and the TPEE brush plate 11 can be improved, and the TPEE bristles 12 and the edge of the TPEE brush plate 11 have a distance less than 2mm, and the TPEE bristles 12 can be disposed closer to the edge of the bristle planting surface 12c, thereby improving the bristle area ratio. When the distance D4 between the TPEE bristles 12 and the edge of the bristle surface 12c is smaller than 0.2mm, the strength of the connection between the TPEE bristles 12 on the side close to the bristle surface 12c and the TPEE brush plate 11 is lowered, which tends to cause the bristles close to the edge of the bristle surface 12c to fall off. When the distance D4 between the TPEE bristles 12 and the edge of the bristle surface 12c is greater than 2mm, the distance D4 between the TPEE bristles 12 and the edge of the bristle surface 12c is excessively large, resulting in a decrease in the bristle area ratio.

Referring to fig. 5, in some embodiments, the length D5 of the TPEE bristle 12 is greater than or equal to 6.5mm and less than or equal to 14mm, so that the moment arm of the TPEE bristle 12 is in a proper range, so that the TPEE bristle 12 is not easily deformed due to the too long moment arm of the TPEE bristle 12, the brushing efficiency and the brushing taste are not affected, and the brushing taste is not easily deformed due to the too short moment arm of the TPEE bristle 12. In addition, the TPEE bristles 12 can be fully contacted with teeth, and the position of the brush head 10 in the oral cavity of a user can be conveniently adjusted, so that the oral cavity can be more comprehensively cleaned. When the length D5 of the TPEE bristles 12 is less than 6.5mm, the length of the TPEE bristles 12 is too short, and part of the TPEE bristles 12 cannot contact the teeth due to interference of oral structures such as teeth, resulting in a decrease in brushing efficiency. When the length D5 of the TPEE bristle 12 is greater than 14mm, the TPEE bristle 12 is excessively long, and the user needs to enlarge the oral cavity to adjust the position of the brush head 10 in the cavity due to the interference of the oral cavity structures such as teeth, which is not beneficial to adjusting the position of the brush head 10 in the oral cavity of the user, and the brushing comfort is reduced.

Referring to fig. 2 and fig. 4 together, in some embodiments, the TPEE bristles 12 include a plurality of bristle tufts 121, each bristle tuft 121 includes a plurality of bristles (not shown), the brush head 10 further includes a constraining ring 13 (see fig. 4), the constraining rings 13 are in one-to-one correspondence with the bristle tufts 121, and the constraining rings 13 are sleeved on the root portions of the corresponding bristle tufts 121 near the bristle planting surface 12c to constrain the plurality of bristles to form the bristle tufts 121, thereby facilitating the injection molding of the TPEE bristles 12 in the form of bristle tufts 121 integrally with the TPEE brush plate 11 and also facilitating the determination of the location of the TPEE bristles 12 on the TPEE brush plate 11.

In some embodiments, the constraint ring 13 may be connected with the TPEE brush plate 11, and the TPEE bristles 12 are connected with both the constraint ring 13 and the TPEE brush plate 11, so that the bonding force between the TPEE bristles 12 and the TPEE brush plate 11 can be further improved. Further, the restriction ring 13 may be protruded from the bristle surface 12c, so that the thickness of the TPEE brush plate 11 may be further reduced, and brushing comfort may be improved. Further, the connecting end 12b of the bristle tuft 121 penetrates out of the constraint ring 13 to be connected with the TPEE brush plate 11, so that the bristle tuft 121 can effectively contact with the TPEE brush plate 11, and the binding force of the bristle tuft 121 and the TPEE brush plate 11 is improved. The free ends 12c of the bristle tufts 121 also pass out of the constraint ring 13 so as to be able to come into contact with the teeth.

Further, the constraint ring 13 is a TPEE constraint ring 13, and the whole formed by the TPEE constraint ring 13 and the bristle tuft 121 is injection molded with the TPEE brush plate 11 into a whole, and since the TPEE constraint ring 13, the TPEE brush plate 11 and the bristle tuft 121 are made of the same material, that is, TPEE material, after the whole formed by the TPEE constraint ring 13 and the bristle tuft 121 is injection molded with the TPEE brush plate 11, the bonding force between the TPEE constraint ring 13 and the bristle tuft 121 and the TPEE brush plate 11 can be further improved, and the connection stability between the bristle tuft 121 and the TPEE brush plate 11 can be further improved.

It will be appreciated that the constraint ring 13 may be omitted, and the number of parts of the brush head 10 may be reduced due to the omission of the constraint ring 13, so that the number of production steps may be reduced, and further the production efficiency may be improved, and in addition, the TPEE brush plate 11 may be directly combined with the TPEE brush plate 11 more, so that the combining force is stronger.

Referring to fig. 3, in some embodiments, the distance D6 between adjacent bristle tufts 121 is greater than or equal to 0.3mm and less than or equal to 3.5mm, so that the bristle tufts 121 are conveniently placed at a designated position before the injection molding of the TPEE brush plate 11, and a smaller distance between the bristle tufts 121 can be provided, thereby increasing the bristle field ratio. When the distance D6 between the adjacent bristle tufts 121 is less than 0.3mm, the distance between the adjacent bristle tufts 121 is too small to facilitate placement of the bristle tufts 121 to a designated position prior to injection molding of the TPEE brush plate 11, resulting in increased difficulty in integral injection molding. When the distance D6 between the adjacent bristle tufts 121 is greater than 3.5mm, the distance between the adjacent bristle tufts 121 is too large, the bristle field is relatively low, and the number of bristle tufts 121 contacting the teeth is small, resulting in reduced brushing efficiency.

In some embodiments, the diameter of a single brush wire is greater than or equal to 0.07mm and less than or equal to 0.25mm, such that the brush wire has a larger diameter and thus a stronger stiffness, while not being too large so that the number of brush wires is less. When the diameter of a single brush wire is smaller than 0.07mm, the brush wire is too thin, and the brush wire is formed by drawing TPEE material, so that the brush wire has certain flexibility, and the brush wire which is too thin is easy to lodge during brushing teeth, so that the effectiveness of brushing teeth is affected. When the diameter of single brush silk is greater than 0.25mm, the brush silk is too thick, leads to single brush silk's resistance to deformation ability to become strong, has harder taste when brushing teeth, stabs the gum easily, also can't go deep into tooth gap and corner and clean, influences cleaning efficiency.

In some embodiments, the number of brush filaments included in the single bristle tuft 121 is greater than or equal to 40 and less than or equal to 300, so that the number of brush filaments of the single bristle tuft 121 is moderate, the single bristle tuft 121 can have a larger contact area with teeth, the probability of each brush filament contacting the teeth can be improved, and the brush filament utilization rate is improved. When the number of brush filaments included in the single bristle tuft 121 is less than 40, the number of brush filaments of the single bristle tuft 121 is too small, so that the contact area between the single bristle tuft 121 and teeth is reduced, and the brushing efficiency is lowered. When the number of brush filaments included in the single bristle tuft 121 is greater than 300, the number of brush filaments of the single bristle tuft 121 is too large, and many brush filaments are positioned in the middle and cannot be fully contacted with teeth, so that the brush filament utilization rate is reduced.

In some embodiments, the bristle tufts 121 may be formed in different shapes due to the strong shape plasticity of the bristle tufts 121, and the cross-sectional shape of the bristle tufts 121 is configured to be at least one of arc, circular, triangular, rectangular, pentagram, oval, quadrilateral, pentagon, etc. in a section perpendicular to the thickness direction B-B of the TPEE brush plate 11, so that the shapes of the respective bristle tufts 121 can be flexibly set according to the layout shape of the TPEE bristles 12 required in the TPEE brush plate 11, and the shape of the bristle tufts 121 is also more beautiful. It will be appreciated that the different confinement rings 13 may be the same or different in shape and each tuft 121 may be the same or different in shape.

In some embodiments, the TPEE brush plate 11 is a rigid brush plate that is stable and can more stably carry TPEE bristles 12. Or the TPEE brush plate 11 is a soft brush plate which can make the brush head 10 have elasticity, and when the brush head 10 is used in an electric toothbrush, the TPEE brush 12 can be more gently contacted with teeth to avoid tooth brushing.

Referring to fig. 4, in some embodiments, the TPEE brush plate 11 includes a bristle part 111 and a base part 112, the bristle part 111 has a bristle surface 12c, and one of the base part 112 and the bristle part 111 is a hard part. The other is a soft part. When the bristle planting part 111 is a soft part and the bottom support part 112 is a hard part, the bottom support part 112 can be connected to one side of the bristle planting part 111 away from the TPEE bristle 12, the bristle planting part 111 has flexibility, and the TPEE bristle 12 is connected with the bristle planting part 111, so that the TPEE bristle 12 is easy to deform from the root, and the TPEE bristle 12 is easy to deform to be attached to the teeth, and by arranging the hard bottom support part 112, the TPEE brush plate 11 can be prevented from being greatly deformed when the TPEE bristle 12 is stressed. Alternatively, as shown in fig. 4, the bristle part 111 is a soft part and the bottom support part 112 is a hard part, the bottom support part 112 is provided in the bristle part 111, and the bottom support part 112 supports the bristle part 111 and contacts the oral cavity of the user through the soft bristle part 111, thereby improving brushing comfort. Alternatively, when the bristle part 111 is a hard part and the bottom support part 112 is a soft part, the bottom support part 112 is connected to the side of the bristle part 111 away from the TPEE bristles 12, the TPEE bristles 12 can be more stably connected with the hard bristle part 111, and the bottom support part 112 is soft and is easy to deform, so that the brushing is more comfortable.

Referring to fig. 2-3, in some embodiments, the brush head 10 further includes a brush bar 14, where the brush bar 14 is connected to one end of the TPEE brush plate 11 in the length extending direction C-C, and the brush bar 14 is the TPEE brush bar 14, and since the TPEE brush bar 14 and the TPEE brush plate 11 are made of TPEE material, the TPEE brush bar 14 and the TPEE brush plate 11 may be integrally injection molded, so as to improve the connection stability between the TPEE brush bar 14 and the TPEE brush plate 11. In addition, the TPEE brush stem 14 made of TPEE material has better toughness, while the hardness of the brush stem 14 is large in the related art, but the texture is brittle, when the brush head 10 is applied to the electric toothbrush, the brush stem 14 is easy to break if the brush head 10 is landed due to the heavy body of the electric toothbrush, and the TPEE brush stem 14 made of TPEE material has better toughness, so that the breakage of the TPEE brush stem 14 when the electric toothbrush is dropped can be avoided.

In some embodiments, the brush bar 14 is entirely rigid, and the brush bar 14 does not deform in a direction away from the teeth when the brush head 10 is subjected to a large force, resulting in a stable shape. Or the whole soft brush rod of the brush rod 14 can have larger swing amplitude and stronger toughness when the brush rod 14 is applied to the electric toothbrush, and is not easy to break when the electric toothbrush falls. Alternatively, the brush rod 14 includes a soft section (not shown) and a hard section (not shown) disposed along the length extending direction C-C, the soft section is connected to the hard section and one end of the TPEE brush plate 11 along the length extending direction C-C, so that the shape of the brush rod 14 is relatively stable, and the brush rod 14 has a larger swing amplitude and stronger toughness when applied to the electric toothbrush, and is not easy to break when the electric toothbrush is dropped; further, the brush rod 14 includes a plurality of soft parts (not shown) and a plurality of hard parts (not shown) which are alternately connected in sequence along the length extending direction C-C, and one end of the TPEE brush plate 11 along the length extending direction C-C is connected with the hard parts or the soft parts, so that the shape of the brush rod 14 is relatively stable, and the brush rod 14 has larger swing amplitude and stronger toughness when being applied to the electric toothbrush, and is not easy to break when the electric toothbrush falls; alternatively, the brush bar 14 includes a hard bar (not shown) and a soft sleeve (not shown) that is disposed on the hard bar, the soft sleeve being disposed outside and soft, and having a soft feel when contacting the oral cavity, the hard bar being disposed inside the soft sleeve and supporting the soft sleeve.

The embodiment of the present application further provides a molding manufacturing method of the brush head 10, so that the brush head 10 has the technical effects as described above, referring to fig. 5, the molding manufacturing method includes:

step S10, forming the TPEE material into thread-shaped TPEE bristles 12 through a wire drawing forming process. Through the step S10, the thread-shaped TPEE bristle 12 can be formed, the TPEE bristle 12 formed by adopting the TPEE material wire drawing has excellent elastic deformation capability, namely high rebound resilience, and the TPEE bristle 12 has soft touch and good taste during brushing

In step S20, one end of the TPEE bristle 12 is placed in an injection mold cavity.

Through step S20, the TPEE bristles 12 are conveniently molded with the TPEE brush plate 11 into one body in the subsequent injection molding process of the TPEE brush plate 11.

In step S30, a TPEE material is injected into the injection cavity to form a TPEE brush plate 11 connected to one end of the TPEE bristles 12 extending into the injection cavity, or a TPEE material is injected into the injection cavity to form a TPEE brush plate 11 connected to one end of the TPEE bristles 12 extending into the injection cavity and a portion of a brush rod 14 connected to the TPEE brush plate 11.

In step S30, two schemes exist, firstly, TPEE material is injected into the injection molding cavity, and only the TPEE brush plate 11 connected to the end of the TPEE bristle 12 extending into the injection molding cavity is molded, so that the brush head 10 formed by the TPEE bristle 12 and the TPEE brush plate 11 into a whole is obtained, so that the brush head 10 has the effects described in the above embodiments, which are not described in detail herein. With the proposal, the molding and manufacturing process is simple and easy to realize. Secondly, injecting TPEE material into the injection molding cavity, forming the TPEE brush plate 11 connected with one end of the TPEE brush 12 extending into the injection molding cavity and the part brush rod 14 connected with the TPEE brush plate 11, thereby obtaining the brush head 10 formed by the TPEE brush 12, the TPEE brush plate 11 and the part brush rod 14 into a whole, so that the brush head 10 has the effects described in the above embodiment, and the TPEE brush plate 11 and the part brush rod 14 are formed simultaneously by the same injection molding process, so that the production efficiency is higher.

In some embodiments, referring to fig. 6-7, the method further comprises:

step S40, forming a first brush rod by using TPEE material;

step S20 is replaced by step S50, one end of the TPEE bristle 12 is placed into an injection molding cavity, and the first brush rod is placed into the injection molding cavity;

the method of injecting TPEE material into the injection mold cavity to form the TPEE brush plate 11 connected to the end of the TPEE bristles 12 extending into the injection mold cavity includes:

as shown in fig. 6, step S31, TPEE material is injected into the injection mold cavity to mold the TPEE brush plate 11 connected to the TPEE bristles 12 and the first brush bar, respectively, or,

the method for injecting the TPEE material into the injection molding cavity to form the TPEE brush plate 11 connected with one end of the TPEE bristles 12 extending into the injection molding cavity and the partial brush rod 14 connected with the TPEE brush plate 11 comprises the following steps:

as shown in fig. 7, in step S32, a TPEE material is injected into the injection cavity to form a TPEE brush plate 11 connected to the TPEE bristles 12 and a second brush bar connected to the TPEE brush plate 11 and the first brush bar, respectively.

In the above embodiment, the first brush bar is formed in step S40, the brush bar 14 includes the first brush bar, and step S40 and step S10 may not be in sequence; the step S50 and the step S31 are used to mold the TPEE brush plate 11 connected with the TPEE brush 12 and the first brush rod, so as to obtain the brush head 10 with the first brush rod, the TPEE brush 12 and the TPEE brush plate 11 molded integrally, so that the brush head 10 has the effects described in the above embodiments, which are not described in detail herein.

Or, the first brush bar is formed through the step S40, and the step S40 and the step S10 can be in no sequence; the step S50 and the step S32 are used to mold the TPEE brush plate 11 connected with the TPEE brush 12 and the second brush rod respectively connected with the TPEE brush plate 11 and the first brush rod, so as to obtain the first brush rod, the second brush rod, the brush head 10 formed by the TPEE brush 12 and the TPEE brush plate 11 into a whole, so that the brush head 10 has the effects described in the above embodiments, and the TPEE brush plate 11 and the second brush rod are molded simultaneously by the same injection molding process, so that the production efficiency is higher. The brush bar 14 includes a first brush bar and a second brush bar.

In some embodiments, in the method of molding the TPEE brush plate 11 connected to the TPEE bristles 12 and the first brush bar, respectively, the first brush bar and the TPEE brush plate 11 are embedded in each other, thereby making the connection of the first brush bar and the TPEE brush plate 11 more stable; in the step of molding the TPEE brush plate 11 connected with the TPEE bristles 12 and the second brush bar connected with the TPEE brush plate 11 and the first brush bar, respectively, the second brush bar is embedded with the first brush bar and the TPEE brush plate 11, thereby making the connection between the second brush bar and the first brush bar and the TPEE brush plate 11 more stable.

Referring to fig. 8, in some embodiments, the method further includes:

step S60, sleeving the outer circumferences of the brush filaments of the plurality of TPEE brush hairs 12 by using the constraint rings 13 so as to constraint the plurality of brush filaments into a plurality of bristle clusters 121 by the plurality of constraint rings 13;

the method of extending one end of the TPEE bristles 12 into the injection mold cavity includes:

in step S21, one end of the plurality of bristle tufts 121 and the corresponding confinement rings 13 are placed into the injection mold cavity.

In the above embodiment, the plurality of brush filaments are restrained to form the multi-cluster bristle cluster 121 through the step S60, so that the TPEE bristles 12 can be more conveniently placed in the injection molding cavity in the form of the bristle cluster 121 and integrally injection molded with the TPEE brush plate 11, the difficulty of placing the TPEE bristles 12 is reduced, at this time, when the restraining ring 13 is made of TPEE material, the restraining ring 13 can also be integrally injection molded with the TPEE brush plate 11, thereby simplifying the production process, and the connection stability between the bristle cluster 121 and the TPEE brush plate 11 can be improved through the restraining ring 13.

In some embodiments, the binding ring 13 is formed by using TPEE material, the whole body formed by the TPEE binding ring 13 and the bristle tuft 121 is injection molded with the TPEE brush plate 11 into a whole, and since the TPEE binding ring 13, the TPEE brush plate 11 and the bristle tuft 121 are all made of the same material, namely TPEE material, after the whole body formed by the TPEE binding ring 13 and the bristle tuft 121 is injection molded with the TPEE brush plate 11, the binding force between the TPEE binding ring 13 and the bristle tuft 121 and the TPEE brush plate 11 can be further improved, and the connection stability between the bristle tuft 121 and the TPEE brush plate 11 can be further improved.

In some embodiments, one end of the bristle tuft 121 placed in the injection molding cavity penetrates out of the constraint ring 13 to be integrally injection molded with the TPEE brush plate 11, so that the contact area of the bristle tuft 121 and the TPEE brush plate 11 is increased, the bristle tuft 121 can effectively contact with the TPEE brush plate 11, and the binding force of the bristle tuft 121 and the TPEE brush plate 11 is improved.

In some embodiments, the melting point of the TPEE bristles 12 is higher than that of the TPEE brush plate 11, so that the TPEE bristles 12 are not instantaneously melted and fused with the liquid TPEE material of the TPEE brush plate 11 to make it difficult to mold during injection molding of the TPEE brush plate 11 by the TPEE material, and only a part of the TPEE bristles 12 is formed, thereby ensuring smooth connection of the TPEE bristles 12 with the TPEE brush plate 11 and smooth molding of the brush head 10.

In some embodiments, the TPEE brush plate 11 and/or brush bar 14 is made transparent or translucent, thus facilitating the observation of the level of soiling of the TPEE brush plate 11 and/or brush bar 14 and also improving the aesthetics of the TPEE brush plate 11 and/or brush bar 14.

In some embodiments, at least two of the TPEE bristles 12, brush bar 14, and TPEE brush plate 11 are different in stiffness, such that at least two components of the molded brush head 10 have different stiffness, thereby making the brush head 10 more prone to deformation for better contact with teeth.

In some embodiments, the molded TPEE brush plate 11 has a lower hardness than the TPEE material of the molded brush bar 14, such that the molded TPEE brush plate 11 has a lower hardness than the brush bar 14, and during brushing, the TPEE brush plate 11 can be more easily deformed to better conform the TPEE bristles 12 to the teeth, while the brush bar 14 having a higher hardness can better support the TPEE brush plate 11 so that the swing amplitude of the brush head 10 is not excessive.

Referring to fig. 9, in some embodiments, after injecting TPEE material into the injection mold cavity to form the TPEE brush plate 11 connected to the end of the TPEE bristle 12 extending into the injection mold cavity, or injecting TPEE material into the injection mold cavity to form the TPEE brush plate 11 connected to the end of the TPEE bristle 12 extending into the injection mold cavity and the portion of the brush stem 14 connected to the TPEE brush plate 11, the method comprises:

in step S70, the end of the TPEE bristle 12 remote from the TPEE brush plate 11 is rounded. By the step S70, the end of the TPEE bristle 12 for contacting the teeth, i.e., the free end 12a, can be kept round, and the gums or other parts of the oral cavity are not easily stabbed. It can be understood that after step S10, that is, after the TPEE material is formed into the thread-shaped TPEE bristles 12 by the wire drawing process, the free ends 12a may be directly rounded, and the rounded TPEE bristles 12 and the TPEE brush plate 11 may be integrally injection molded, so that the free ends 12a may be kept round and not easily stab gums or other parts of the oral cavity.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (19)

1. A brush head, the brush head comprising:

TPEE bristles having opposed free and connected ends; the method comprises the steps of,

the TPEE brush plate is connected with the connecting ends of the TPEE bristles, the TPEE brush plate and the TPEE bristles are of an integrated structure, and the free ends of the TPEE bristles extend from the surface of the TPEE brush plate.

2. The brush head according to claim 1, wherein,

the Shore D hardness of the TPEE brush hair is more than or equal to 60 and less than or equal to 90;

the Shore D hardness of the TPEE brush plate is more than or equal to 65 and less than or equal to 85;

wherein the difference between the Shore D hardness of the TPEE bristles and the Shore D hardness of the TPEE brush plate is not more than 10.

3. The brush head of claim 2, wherein the TPEE bristles have a shore D hardness greater than the TPEE brush plate.

4. The brush head of claim 1, wherein the TPEE bristles have a melting point higher than the TPEE brush plate.

5. The brush head of claim 1, wherein the connection end is embedded in the TPEE brush plate to a depth of 0.5mm or more in a thickness direction of the TPEE brush plate.

6. The brush head of claim 1, wherein a ratio of a depth of the connection end embedded in the TPEE brush plate to a thickness of the TPEE brush plate is 0.2 or more and 0.8 or less.

7. The brush head of claim 1, wherein the TPEE brush plate has opposite bristle bearing surfaces and back surfaces along a thickness direction of the TPEE brush plate, free ends of the TPEE bristles extending from the bristle bearing surfaces, and a distance between the connecting ends of the TPEE brush plate and the back surfaces is 0.2mm or more and 2mm or less.

8. The brush head of claim 1, wherein the TPEE brush plate has a bristle surface at which free ends of the TPEE bristles extend, and wherein a spacing between the TPEE bristles and an edge of the bristle surface is 0.2mm or more and 2mm or less.

9. The brush head of claim 1, wherein the TPEE bristles have a length of 6.5mm or more and 14mm or less.

10. The brush head of claim 1, wherein the TPEE brush plate has a bristle surface at which free ends of the TPEE bristles extend, the TPEE bristles comprising a plurality of bristle tufts, each bristle tuft comprising a plurality of brush filaments, the brush head further comprising:

and the constraint rings are in one-to-one correspondence with the bristle clusters and are sleeved on the root parts of the corresponding bristle clusters, which are close to the bristle planting surfaces, so as to constrain a plurality of brush filaments to form the bristle clusters.

11. The brush head according to claim 10, wherein the brush head comprises a plurality of bristles,

the constraint ring is connected with the TPEE brush plate and is convexly arranged on the hair planting surface; and/or

The connecting end of the bristle cluster penetrates out of the constraint ring to be connected with the TPEE brush plate; and/or

The constraint ring is a TPEE constraint ring, and the whole formed by the TPEE constraint ring and the bristle tufts is integrally injection molded with the TPEE brush plate.

12. The brush head of claim 1, wherein the TPEE bristles comprise a plurality of bristle tufts, each bristle tuft comprising a plurality of bristles, a spacing between adjacent bristle tufts being 0.3mm or more and 3.5mm or less.

13. The brush head of claim 1, wherein the TPEE bristles comprise a plurality of bristle tufts, each bristle tuft comprising a plurality of bristles, a single bristle having a diameter of 0.07mm or more and 0.25mm or less, and/or a single bristle tuft comprising a number of bristles of 40 or more and 300 or less.

14. The brush head of claim 1, wherein the TPEE bristles comprise a plurality of bristle tufts, each bristle tuft comprising a plurality of bristles, the TPEE bristle tufts having a cross-sectional shape configured in at least one of an arc, a circle, a triangle, a five-star, an ellipse, a quadrilateral, and a pentagon in a cross-section perpendicular to a thickness direction of the TPEE brush plate.

15. The brush head of claim 1, wherein the TPEE brush plate is a hard brush plate or a soft brush plate.

16. The brush head of claim 1, wherein the TPEE brush plate comprises:

the hair-planting part is provided with a hair-planting surface, and the free ends of the TPEE bristles extend out of the hair-planting surface;

and the bottom support part is connected to one side of the hair planting part, which is away from the TPEE bristles, or embedded in the hair planting part, one of the bottom support part and the hair planting part is a hard part, and the other is a soft part.

17. The brush head of any of claims 1-16, wherein the brush head further comprises:

and the brush rod is connected with one end of the TPEE brush plate in the length extending direction, and the brush rod is a TPEE brush rod.

18. The brush head of claim 17 wherein the brush head comprises a plurality of bristles,

the whole brush rod is a hard brush rod or a whole soft brush rod; or alternatively

The brush rod comprises a soft section and a hard section which are arranged along the length extending direction, and the soft section is connected with the hard section and one end of the TPEE brush plate along the length extending direction; or alternatively

The brush rod comprises a plurality of soft parts and a plurality of hard parts which are alternately connected in sequence along the length extending direction, and one end of the TPEE brush plate along the length extending direction is connected with the hard parts or the soft parts; or alternatively

The brush rod comprises a hard rod and a soft sleeve, and the soft sleeve is sleeved on the hard rod.

19. An electric toothbrush comprising a handle and a head according to any one of claims 1 to 18, said head being detachably connected to said handle.

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