Brush head assembly and toothbrush with same

Abstract

The utility model discloses a brush head assembly and a toothbrush with the same. The brush head assembly comprises a bristle planting piece, a balancing weight and a brush rod piece. The balancing weight is provided with a first surface relatively close to the flocking piece; a mounting groove is formed in one end of the brush rod piece, the bristle planting piece is arranged in the mounting groove, the same end of the bristle planting piece and the balancing weight are fixed in an injection molding mode, the balancing weight and the bristle planting piece are arranged at intervals, and at least half of the first surface is wrapped by the brush rod piece. The bristle planting piece and the balancing weight can be positioned and assembled, interference of the balancing weight to the function of the bristle planting piece is avoided, the brush rod piece wraps at least half of the first surface of the balancing weight, the stability of the assembly structure is improved, the balancing weight is effectively prevented from loosening or falling off in the using process, and the service life of the brush rod piece is prolonged. In addition, the coating part of the brush rod piece can prevent water stains and foam from being in contact with the balancing weight in the using process of the toothbrush, pollution to the balancing weight is reduced, bacterium breeding is reduced, oral hygiene is guaranteed, and the reliability, the installation performance and the attractiveness of the toothbrush are improved.

Description

Technical Field

[0001] The present application relates to the technical field of toothbrushes, and in particular to a brush head assembly and a toothbrush having the same. Background Art

[0002] A toothbrush is an essential oral cleaning utensil in daily life, and is used to clean teeth using the bristles on the brush head.

[0003] As living standards improve, electric toothbrushes are becoming increasingly popular. Electric toothbrushes achieve efficient cleaning through the high-frequency vibrations of their brush heads, offering superior cleaning results and user experience compared to traditional toothbrushes. Some existing electric toothbrushes incorporate counterweights to increase overall weight, maintain stability during high-frequency vibrations, and enhance cleaning effectiveness.

[0004] However, a toothbrush will produce a lot of foam and water stains during use. The water stains will enter the brush head and contaminate the counterweight. Rust stains on the counterweight will contaminate the bristles and even breed bacteria, which is not conducive to oral hygiene. Summary of the Invention

[0005] The purpose of this application is to provide a brush head assembly and a toothbrush having the same.

[0006] To achieve at least one of the above-mentioned purposes, an embodiment of the present application provides a brush head assembly, comprising:

[0007] Hair transplanting parts;

[0008] A counterweight having a first surface relatively close to the hair implant;

[0009] The brush rod has a mounting groove formed at one end, the hair planting piece is arranged in the mounting groove, and the same end is injection-molded and fixed with the counterweight block. The counterweight block and the hair planting piece are spaced apart, and at least half of the first surface is covered by the brush rod.

[0010] The brush head assembly provided by the application can position and assemble the bristle implant and the counterweight through the cooperation structure design of the bristle implant, the counterweight and the brush rod, the counterweight is arranged in a layout spaced apart from the bristle implant, interference of the counterweight on the function of the bristle implant is avoided, and the interval between the counterweight and the bristle implant can avoid mutual contamination of the counterweight, water stains and the bristle implant when the water stains invade, that is, contamination such as rust stains generated by the counterweight after long-term use is prevented from being transmitted to the bristle implant, thereby ensuring safe use of the user; the brush rod covers at least half of the first surface of the counterweight, which can not only increase the covering area of the brush rod and the counterweight, improve the stability of the assembly structure, and effectively prevent the counterweight from loosening or falling off during use, but also the covering part of the brush rod can further play a protection role, that is, the brush rod can block the contact of water stains and foam with the counterweight during use of the toothbrush, reduce pollution to the counterweight, further reduce bacterial growth, ensure oral hygiene, and improve the reliability, installability and aesthetics of the toothbrush.

[0011] As a further improvement of an embodiment of the application, the periphery of the counterweight near the bristle implant is provided with an embedded part, the embedded part is protruded relative to the first surface and extends towards the bristle implant; the brush rod covers the embedded part.

[0012] In this way, the contact area of the counterweight and the brush rod is increased, thereby improving the assembly stability of the two, effectively preventing the counterweight from loosening or falling off during use, and the embedded part can guide the flow of plastic material during injection molding, which is beneficial to reducing bubbles or lines generated at the contact between the brush rod and the counterweight during injection molding; the embedded part is arranged at the periphery of the counterweight, which can reasonably utilize the cooperation structure and space of the brush head, balance the weight and volume of the counterweight, and further reasonably match the weight and volume of the brush head; the brush rod covering the embedded part can also avoid the formation of gaps between the embedded part of the counterweight and the brush rod, prevent the accumulation of water stains and foam, reduce bacterial growth, and improve the use safety of the product.

[0013] As a further improvement of an embodiment of the application, the counterweight has a side wall and a bottom wall facing away from the bristle implant, the side wall and the bottom wall are arc transitioned, and the radius range of the arc is 1mm to 2mm.

[0014] In this way, the arc transition of the side wall and the bottom wall of the counterweight not only facilitates injection molding and avoids inclination and deviation of the counterweight during injection molding, but also facilitates demolding of the brush rod after injection molding, and can guide the flow of plastic material during injection molding, avoid the convergence of turbulence and bubbles generated at the transition, and be beneficial to reducing bubbles or lines generated at the contact between the brush rod and the counterweight during injection molding, thereby avoiding affecting the aesthetics by seeing the bubbles or lines through the brush rod; the radius range of the arc can take into account the fluidity of the plastic material and the weight and volume of the counterweight.

[0015] As a further improvement of the embodiment of the application, the counterweight is provided with a positioning column on the side close to the bristle implanting member, which protrudes from the first surface to the bristle implanting member.

[0016] In this way, during injection molding, the positioning column protrudes into the mold cavity and is fixed with the mold, so as to avoid the position deviation of the counterweight during injection molding, thereby improving the injection molding yield and the aesthetic appearance of the counterweight and the brush rod member.

[0017] As a further improvement of the embodiment of the application, the counterweight further has a second surface away from the bristle implanting member, and the second surface is provided with a texture structure for increasing the surface adhesion.

[0018] In this way, by providing the texture structure on the second surface, the surface adhesion of the counterweight can be improved, the gas flow during injection molding can be prevented from being poor to generate bubbles or lines, thereby affecting the visual aesthetic appearance of the brush head, and the texture structure can also increase the friction between the brush rod member and the counterweight, thereby improving the combination firmness of the two and preventing the counterweight from loosening.

[0019] As a further improvement of the embodiment of the application, the texture structure is a protruding texture structure and / or a recessed texture structure integrally formed on the second surface.

[0020] In this way, by the protruding texture structure and / or the recessed texture structure, the roughness of the second surface of the counterweight can be increased, the generation of bubbles and lines during injection molding can be reduced, and the reflectivity can be reduced, so that the bubbles and lines are not easy to be visually observed, thereby improving the aesthetic appearance of the brush head.

[0021] As a further improvement of the embodiment of the application, the texture of the texture structure is in a strip shape, and the extension direction of the texture is parallel to the axial direction of the brush head.

[0022] Alternatively, the texture of the texture structure is in a grid shape.

[0023] In this way, by setting the texture in a strip shape and limiting the extension direction of the texture to be parallel to the axial direction of the brush head, the flowability of the glue during injection molding can be improved, which is beneficial to defoaming; by setting the texture in a grid shape, the friction coefficient of the second surface of the counterweight can be improved, thereby greatly improving the surface adhesion and reducing the generation of bubbles during injection molding.

[0024] As a further improvement of the embodiment of the application, the texture structure is a texture structure layer attached to the second surface.

[0025] In this way, by the texture structure layer, the friction coefficient of the second surface of the counterweight can be improved, thereby greatly improving the surface adhesion to reduce the generation of bubbles during injection molding.

[0026] As a further improvement of the embodiment of the application, the texture structure layer is attached to the second surface by at least one of sandblasting, electroplating, spraying and bonding.

[0027] In this way, the texture structure layer and the second surface have strong bonding force, the texture structure layer is prevented from separating from the second surface, the roughness and friction coefficient of the second surface are improved, the surface adhesion is improved, and the generation of bubbles during injection molding is reduced.

[0028] As a further improvement of the embodiment of the application, the texture structure layer is attached to the second surface by bonding, and the texture structure layer is an epoxy resin bonding layer, a polyurethane bonding layer, an acrylic bonding layer or a silicone bonding layer.

[0029] In this way, the bonding layer can not only enhance the adhesion of the gel to the second surface of the weight block, effectively eliminate bubbles and lines, but also the epoxy resin bonding layer has excellent mechanical properties and chemical resistance, can maintain stable adhesion under high temperature and harsh environment; the polyurethane bonding layer has excellent flexibility and impact resistance, can buffer the vibration during use of the electric toothbrush; the acrylic bonding layer has the characteristics of rapid curing and high transparency, can reduce the curing time and shorten the production cycle, and has high transparency, which is beneficial to the appearance; the silicone bonding layer has excellent high temperature resistance and aging resistance, and thus has excellent environmental adaptability and stability.

[0030] As a further improvement of the embodiment of the application, the brush rod member is a transparent member.

[0031] In this way, the weight block can be observed from the outside, and the texture and aesthetics of the brush head are improved.

[0032] As a further improvement of the embodiment of the application, the brush head assembly further comprises a flexible member, the flexible member covers the periphery of the brush rod member, and the flexible member is a transparent member.

[0033] In this way, the flexible member can prevent the toothbrush from knocking the teeth when the brush head swings during use, which is beneficial to protect the teeth and oral cavity, and can also improve the use comfort; the flexible member is a transparent member, which can improve the aesthetics of the brush head.

[0034] As a further improvement of the embodiment of the application, the brush head assembly further comprises a clamping structure, the clamping structure comprises a clamping hook and a clamping groove that cooperate with each other, one of the clamping hook and the clamping groove is arranged on the bristle implanting member, and the other is arranged on the flexible member, the clamping hook is clamped in the clamping groove, so that the bristle implanting member is fixed relative to the flexible member.

[0035] In this way, the clamping hook is clamped in the clamping groove, the bristle implanting member is fixed relative to the flexible member, and the use stability of the toothbrush is improved; and the brush head part of the electric toothbrush can be replaced only by replacing the bristle implanting member, which is convenient to replace and beneficial to save costs.

[0036] As a further improvement of an embodiment of the present application, the hair implanting piece is fixed to the flexible piece by ultrasonic welding.

[0037] With such an arrangement, the connection strength between the flexible part and the hair-implanted part can be improved by ultrasonic welding, and the fitting gap can be reduced, thereby preventing water stains and foam from entering the fitting gap and breeding bacteria.

[0038] In order to achieve at least one of the above-mentioned application purposes, an embodiment of the present application further provides a toothbrush, including the above-mentioned brush head assembly.

[0039] The toothbrush provided in the present application can position and assemble the bristle implantation part and the counterweight block through the coordinated structural design of the bristle implantation part, the counterweight block and the brush rod part. The layout of the interval between the counterweight block and the bristle implantation part avoids the interference of the counterweight block on the function of the bristle implantation part. At the same time, the interval between the two can prevent the counterweight block, water stains and the bristle implantation part from being contaminated by water stains, that is, it avoids the rust stains and other pollution generated by the counterweight block after long-term use from being transferred to the bristle implantation part, thereby ensuring the safety of user use; the brush rod part covers at least half of the first surface of the counterweight block, which not only increases the covering area of ​​the brush rod part and the counterweight block, improves the stability of the assembly structure, and effectively prevents the counterweight block from loosening or falling off during use, but also the covering part of the brush rod part can further play a protective role, that is, it can block the contact between water stains and foam and the counterweight block during the use of the toothbrush, reduce the contamination of the counterweight block, further reduce bacterial growth, ensure oral hygiene, and improve the reliability, installation and aesthetics of the toothbrush. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 1 is a schematic diagram of the three-dimensional structure of the brush head assembly of Example 1 of the present application;

[0041] Figure 2 yes Figure 1 Explosion diagram of

[0042] Figure 3 This is a partial structural diagram of the counterweight block and brush rod member of Example 1;

[0043] Figure 4 yes Figure 1 Bottom view of

[0044] Figure 5 yes Figure 4 Sectional view along line AA;

[0045] Figure 6 Yes Figure 5 A magnified schematic diagram of part B in the middle;

[0046] Figure 7 Another embodiment is along Figure 4 Partial cross-sectional view along line AA;

[0047] Figure 8 is a structural schematic view of a second surface of the counterweight of Example 1;

[0048] Figure 9 is a structural schematic view of a second surface of the counterweight of Example 2;

[0049] Figure 10 is a structural schematic view of a second surface of the counterweight of Example 3.

[0050] BRIEF DESCRIPTION OF DRAWINGS

[0051] 100, brush head assembly; 1, bristle piece; 2, counterweight; 21, first surface; 22, fitting part; 23, side wall; 24, bottom wall; 25, positioning column; 26, second surface; 27, texture structure; 271, texture structure layer; 28, main body; 3, brush rod piece; 31, mounting groove; 32, support part; 33, limiting part; 34, brush rod segment; 35, brush head segment; 36, isolation layer; 4, bristle; 5, flexible piece; 51, fitting part; 52, accommodating cavity; 53, fitting hole; 6, clamping structure; 61, clamping hook; 62, clamping groove. DETAILED DESCRIPTION

[0052] The present application will be described in detail below with reference to specific embodiments shown in the drawings.

[0053] In various drawings of the present application, certain dimensions of structures or parts are exaggerated relative to other structures or parts for purposes of illustration, and thus, are merely intended to illustrate the basic structure of the subject matter of the present application.

[0054] It should be understood that although the terms "first", "second", "third" and the like can be used herein to describe various elements, structures or parameters, these elements, structures or parameters should not be limited by these terms. These terms are only used to distinguish one element, structure or parameter from another.

[0055] Example 1

[0056] The present embodiment provides a toothbrush for cleaning teeth. Specifically, in the present embodiment, the toothbrush is an electric toothbrush.

[0057] As a tool for cleaning the oral cavity, the electric toothbrush drives the brush head to vibrate at high frequency by the motor, so as to clean the teeth, and the high-frequency vibration of the brush head can decompose the toothpaste into fine foam, which can deeply clean the dental crevices, so as to improve the cleaning effect on the oral cavity.

[0058] The toothbrush comprises a brush head assembly 100 and a handle, and the brush head assembly 100 and the handle are assembled to form the toothbrush. The motor is arranged in the handle, and the motor drives the output shaft to rotate, so as to make the brush head vibrate at high frequency.

[0059] Referring to FIG. 1, a brush head assembly 100 is shown. Figures 1 to 2 As shown in FIG. 1, the brush head assembly 100 comprises a bristle holder 1, a weight block 2 and a brush rod 3.

[0060] The bristle holder 1 is used to fix the bristles 4, which can realize the cleaning function of the toothbrush by acting on the teeth. The bristles 4 can be fixed to the bristle holder 1 by a bristle implantation process.

[0061] The weight block 2 is used to increase the overall weight of the brush head, so as to maintain the stability of the brush head when it vibrates at high frequency and enhance the cleaning effect. The weight block 2 can be a metal block, preferably a stainless steel block, so as to increase the weight of the brush head while avoiding the volume of the brush head being too large, maintain the stability of the brush head when it vibrates at high frequency and achieve the effect of shock absorption.

[0062] The brush rod 3 is a rod, one end of which is used to set the bristle holder 1 to clean the teeth, and the other end is connected with the handle and used to fix the output shaft of the motor. Through the connection of the brush rod 3 and the handle, the output shaft of the motor can be connected with the brush head, so as to drive the brush head to vibrate at high frequency when the motor drives the output shaft to rotate.

[0063] The end of the brush rod 3 away from the handle forms a mounting groove 31, and the bristle holder 1 is arranged in the mounting groove 31 and at least partially embedded in the mounting groove 31, so as to realize the assembly of the bristle holder 1 and the brush rod 3.

[0064] Specifically, the side of the brush rod 3 close to the bristle holder 1 is recessed in the direction away from the bristle holder 1 to form the mounting groove 31.

[0065] The same end of the brush rod 3 forming the mounting groove 31 is fixed with the weight block 2 by injection molding, and the weight block 2 is arranged in a spaced manner with the bristle holder 1, and the weight block 2 is located on the side of the bristle holder 1 away from the bristles. The weight block 2 has a first surface 21 relatively close to the bristle holder 1, and at least half of the first surface 21 is covered by the brush rod 3.

[0066] In this way, through the matching structure design of the bristle implanting member 1, the weight block 2 and the brush rod member 3, the bristle implanting member 1 and the weight block 2 can be positioned and assembled, the weight block 2 is arranged in a spaced manner with the bristle implanting member 1, the function of the bristle implanting member 1 is avoided from being interfered by the weight block 2, meanwhile, the interval between the two can avoid mutual pollution of the weight block 2, water stains and the bristle implanting member 1 when water stains invade, that is, the rust stains generated by the weight block 2 after a long time of use are avoided from being transferred to the bristle implanting member 1, thereby ensuring the safe use of the user; the brush rod member 3 covers at least half of the first surface 21 of the weight block 2, which not only can increase the covering area of the brush rod member 3 and the weight block 2, improve the stability of the assembly structure, effectively prevent the weight block 2 from loosening or falling off during use, but also the covered part of the brush rod member 3 can further play a protection role, that is, during the use of the toothbrush, the contact of water stains, foam and the weight block 2 can be blocked, the pollution to the weight block 2 is reduced, the breeding of bacteria is further reduced, the oral hygiene is ensured, and the reliability, installability and aesthetics of the toothbrush are improved.

[0067] The brush rod member 3 comprises a brush rod segment 34 and a brush head segment 35, one end of the brush rod segment 34 is connected with the handle, the other end is connected with the brush head segment 35, and the mounting groove 31 is arranged on the brush head segment 35. In the extension direction of the brush rod member 3, the diameter of the brush rod segment 34 gradually decreases from the end connected with the handle to the other end. In this way, not only can the requirement of easy holding of the handle be met, the handle has a relatively large diameter, but also the brush head segment 35 has a small size, so as to be easily stretched into the oral cavity, and the appearance of the brush rod member 3 is smooth, and the overall aesthetics of the brush rod member 3 is improved.

[0068] In the embodiment, the length of the brush rod segment 34 is greater than the length of the brush head segment 35, the brush rod segment 34 can relatively better transmit vibration, and the cleaning effect of the brush head assembly 100 is realized; it can be understood that in other embodiments, according to different working conditions, the length of the brush rod segment 34 can be basically the same as the length of the brush head segment 35, that is, the overall brush head assembly 100 is relatively short.

[0069] The end of the brush rod member 3 forming the mounting groove 31 is injection molded with the weight block 2, that is, the brush rod member 3 is injection molded. During injection molding, the weight block 2 is first placed in the mold cavity, then the molten plastic material is filled into the mold cavity, the molten plastic material is filled along the outer peripheral surface of the weight block 2 into the mold cavity, and then the mold is demolded after setting, so as to realize the injection molding of the brush rod member 3 and the weight block 2, the covering of the brush rod member 3 to the weight block 2, and the control of the area and size of the weight block 2 covered by the brush rod member 3 according to the requirement.

[0070] In the embodiment, 60% to 90% of the area of the first surface 21 is covered by the brush rod member 3, so as to form an isolation layer 36 between the bristle unit 1 and the weight block 2, and the isolation layer 36 forms the bottom of the mounting groove 31. The proportion of the covered area on the first surface 21 can ensure that the brush rod member 3 and the weight block 2 have sufficient bonding strength, greatly reduce the possibility of water stains and foam contacting the weight block 2, and facilitate injection molding.

[0071] Referring to Figure 2 The weight block 2 includes a main body 28, and a fitting portion 22 is arranged on the periphery of the weight block 2 close to the bristle unit 1. The fitting portion 22 is formed around the main body 28, and the fitting portion 22 protrudes relative to the first surface 21 and extends towards the bristle unit 1. That is, the fitting portion 22 protrudes out of the main body 28 in the direction towards the bristle unit 1, forming a protruding structure around the edge of the main body 28, so that the weight block 2 as a whole forms a bowl-like structure with a concave middle and a protruding periphery.

[0072] The brush rod member 3 covers the fitting portion 22, that is, the brush rod member 3 covers the fitting portion 22 around the periphery of the weight block 2. The part of the brush rod member 3 covering the fitting portion 22 is connected with the isolation layer 36, and the two together form part of the mounting groove 31.

[0073] In this way, the contact area between the weight block 2 and the brush rod member 3 is increased, thereby improving the assembly stability of the two, effectively preventing the weight block 2 from loosening or falling off during use, and the fitting portion 22 can guide the flow of plastic material during injection molding, which is beneficial to reducing bubbles or lines generated at the contact between the brush rod member 3 and the weight block 2 during injection molding. In addition, the fitting portion 22 is arranged on the periphery of the weight block 2, which can reasonably utilize the matching structure and space of the brush head, balance the weight and volume of the weight block 2, and further reasonably match the weight and volume of the brush head. The brush rod member 3 covering the fitting portion 22 can also avoid the formation of a gap between the fitting portion 22 of the weight block 2 and the brush rod member 3, prevent the accumulation of water stains and foam, reduce bacterial growth, and improve the safety of the product in use.

[0074] In the embodiment, the brush rod member 3 is a transparent member, so that the weight block 2 can be clearly observed from the outside, improving the texture and aesthetics of the brush head.

[0075] The transparent member refers to a member that can transmit visible light, that is, the brush rod member 3 is configured such that the weight block 2 can be visually observed through the brush rod member 3.

[0076] Specifically, the material of the brush rod member 3 can be selected as needed to achieve different visual effects. For example, if only the outline or color of the weight block 2 needs to be visually observed through the brush rod member 3, a material with relatively low transparency can be selected; if the details of the side of the weight block 2 facing the brush rod member 3 need to be visually observed through the brush rod member 3, a material with relatively high transparency can be selected.

[0077] In the case that the brush rod member 3 is transparent, the fitting portion 22 can also shield the area between the bristle member 1 and the weight block 2, so as to prevent the structure inside the fitting portion 22 of the weight block 2 from being seen through the brush rod member 3, thereby improving the overall appearance of the brush head.

[0078] Referring to Figure 2 When the brush rod member 3 covers the fitting portion 22, the portion of the brush rod member 3 between the fitting portion 22 and the bristle member 1 forms a support portion 32, which is annular along the circumference of the weight block 2. The end of the bristle member 1 facing the weight block 2 abuts against the support portion 32. Therefore, when the bristle member 1 is assembled in the mounting groove 31, the support portion 32 supports the bristle member 1 along the circumference thereof, which not only prevents the bristle member 1 from tilting or falling into the inside of the fitting portion 22, thereby improving the assembly yield and the appearance of the brush head, but also avoids the direct contact between the bristle member 1 and the isolation layer 36.

[0079] The brush rod member 3 further comprises a limiting portion 33, which is arranged around the circumference of the bristle member 1 and forms an annular structure surrounding the circumference of the bristle member 1. The limiting portion 33 protrudes relative to the weight block 2 and extends towards the side where the bristle member 1 is located. In this way, the limiting portion 33 constitutes the side wall of the mounting groove 31. When the bristle member 1 is assembled in the mounting groove 31, the circumference of the bristle member 1 abuts against the limiting portion 33, which can realize the positioning of the circumference of the bristle member 1, thereby improving the assembly yield and the appearance and avoiding the shaking of the bristle member 1 during use.

[0080] The limiting portion 33 is connected with the support portion 32 and is substantially perpendicular to the support portion 32, so as to adapt to the shape of the bristle member 1 and form the support and the limiting of the bristle member 1 together.

[0081] Referring to Figure 2 and Figure 3 In this way, the brush rod member 3 as a whole forms a bowl-like structure, which protrudes around and is concave in the middle to form the mounting groove 31, so as to facilitate the assembly of the bristle member 1.

[0082] In combination with Figures 2 to 7The counterweight 2 has a side wall 23 and a bottom wall 24 facing away from the bristle mounting 1, the side wall 23 is provided with a circumferential edge along the circumferential edge of the bottom wall 24, the side wall 23 and the bottom wall 24 are arc transition, and the radius of the arc transition is 1mm to 2mm. Through the arc transition of the side wall 23 and the bottom wall 24 of the counterweight 2, not only is it beneficial to injection molding to avoid the inclination of the counterweight 2 during injection molding, but it is also beneficial to the demolding of the brush rod 3 after injection molding. During the injection molding process, the flow of plastic material can also be guided to avoid the accumulation of turbulence and bubbles at the transition, which is beneficial to reducing the bubbles or lines generated at the contact between the brush rod 3 and the counterweight 2 during injection molding, and avoiding the influence of the bubbles or lines on the appearance through the brush rod 3. Through the setting of the radius range of the arc, the flowability of the plastic material and the weight and volume of the counterweight 2 can be considered.

[0083] In the embodiment, the bottom wall 24 is a waist circle, and the length direction is parallel to the axial direction of the brush rod 3, and the fitting part 22 is part of the side wall 23, so that the processing difficulty of the counterweight 2 can be reduced.

[0084] The counterweight 2 is provided with a positioning structure, and through the cooperation of the positioning structure and the cooperating structure of the mold cavity, the fixation of the counterweight 2 during injection molding can be realized, and the deviation of the counterweight 2 from the preset position during injection molding can be avoided.

[0085] Referring to Figures 2 to 7 Specifically, the side of the counterweight 2 close to the bristle mounting 1 is provided with a positioning column 25, that is, the positioning structure is the positioning column 25 provided on the side of the counterweight 2 close to the bristle mounting 1, and the positioning column 25 protrudes from the first surface 21 to the bristle mounting 1.

[0086] During injection molding, the positioning column 25 extends into the mold cavity and is fixed with the mold, which can avoid the position deviation of the counterweight 2 during injection molding, improve the injection molding yield, and improve the appearance of the counterweight 2 and the brush rod 3.

[0087] The positioning column 25 protrudes relative to the isolation layer 36 and extends towards the bristle mounting 1, that is, the positioning column 25 protrudes into the mounting groove 31 to facilitate demolding. Correspondingly, the isolation layer 36 forms a notch corresponding to the positioning column 25.

[0088] In the embodiment, the end of the positioning column 25 towards the bristle mounting 1 is flush with the end of the supporting part 32 towards the bristle mounting 1, that is, on the same plane. In this way, the positioning column 25 can also support the bristle mounting 1, thereby achieving multi-point support of the bristle mounting 1 and improving the assembly yield and assembly stability of the bristle mounting 1.

[0089] Combined with Figures 3 to 7The positioning column 25 is spaced apart by two to prevent the weight block 2 from rotating during injection molding, improve the stability of the weight block 2 during injection molding, and also increase the support point of the bristle planting piece 1, improve the assembly yield and assembly stability of the bristle planting piece 1, and also avoid the positioning column 25 being arranged too much to make the area of the first surface 21 covered by the brush rod piece 3 too small.

[0090] Of course, the number of positioning columns 25 can also be more than two according to needs, and correspondingly, the area of the positioning column 25 on the first surface 21 needs to be controlled to ensure the area of the first surface 21 covered by the brush rod piece 3.

[0091] Of course, the positioning structure can also be a positioning groove, that is, the weight block 2 is provided with a positioning groove recessed from the first surface 21 in a direction away from the bristle planting piece 1. The number of positioning grooves can also be arranged according to needs.

[0092] During injection molding, the protruding structure of the mold cavity extends into the positioning groove, thereby fixing the weight block 2 with the mold, avoiding position deviation of the weight block 2 during injection molding, not only improving the injection molding yield, but also making the weight block 2 and the injection molded part beautiful.

[0093] In combination Figures 8 to 10 The weight block 2 also has a second surface 26 facing away from the bristle planting piece 1, and the second surface 26 at least includes the surface of the bottom wall 24 facing away from the bristle planting piece 1. The second surface 26 can also be defined as including the surface of the bottom wall 24 facing away from the bristle planting piece 1 and the surface of the side wall 23 facing away from the bristle planting piece 1.

[0094] The second surface 26 is provided with a texture structure 27 for increasing surface adhesion. Through the texture structure 27, the surface adhesion of the weight block 2 can be improved, avoiding poor gas flow during injection molding to generate bubbles or lines, thereby affecting the visual aesthetics of the brush head. On the other hand, the texture structure 27 can improve the friction between the brush rod piece 3 and the weight block 2, thereby improving the combination firmness of the two, avoiding loosening of the weight block 2.

[0095] In this embodiment, the texture structure 27 can be a protruding texture structure integrally formed on the second surface 26, that is, the texture structure protrudes relative to the second surface 26 in a direction away from the bristle planting piece 1.

[0096] The texture structure 27 can also be a recessed texture structure integrally formed on the second surface 26, that is, the texture structure is recessed relative to the second surface 26 in a direction toward the bristle planting piece 1.

[0097] The texture structure 27 can also include both protruding texture structures integrally formed on the second surface 26 and recessed texture structures integrally formed on the second surface 26. The protruding texture structures and the recessed texture structures can be arranged in different regions or staggered.

[0098] The protruding texture structures and the recessed texture structures can increase the roughness of the second surface 26 of the weight block 2, reduce the generation of bubbles and lines during injection molding, and reduce the reflectivity, so that bubbles and lines are not easily visible, thereby improving the aesthetics of the brush head.

[0099] The protruding texture structures can be integrally formed on the second surface 26 by spraying, plating, or the like. The recessed texture structures can be integrally formed on the second surface 26 by chemical etching.

[0100] Referring to Figure 8 In the embodiment, the texture of the texture structure 27 is strip-shaped, and the extension direction of the texture is parallel to the axial direction of the brush head, that is, the axial direction of the brush rod section 34 of the brush rod member 3, as shown in the extension direction of the X-axis in Figure 8 By arranging the texture to be strip-shaped and limiting the extension direction of the texture to be parallel to the axial direction of the brush head, the fluidity of the glue during injection molding can be improved, which is beneficial to defoaming.

[0101] Referring to Figures 1 to 7 The brush head assembly 100 further includes a flexible member 5 that covers the periphery of the brush rod member 3 to prevent the brush head from knocking the teeth when the toothbrush is used, which is beneficial to protecting the teeth and the oral cavity and improving the use comfort. The flexible member 5 has a receiving cavity 52 therein, the opening direction of the receiving cavity 52 is the same as the opening direction of the mounting groove 31, the brush head section 34 of the brush rod member 3 is located in the receiving cavity 52, and the bristle carrier 1 is at least partially embedded in the receiving cavity 52, and the bristles 4 protrude out of the flexible member 5.

[0102] The flexible member 5 further has a connecting hole 53 facing the brush rod section, the brush rod section 34 is located outside the flexible member 5, and the brush head section 35 and the brush rod section 34 are integrally connected through the connecting hole 53.

[0103] The brush rod section 34 and the brush head section 35 are integrally formed by injection molding, and the flexible member 5 is fixed to the periphery of the brush rod member 3 by injection molding.

[0104] The flexible member 5 is a transparent member. That is, the flexible member 5 is configured such that the structure inside the flexible member 5 can be visible through the flexible member 5, thereby improving the aesthetics of the brush head.

[0105] In particular, in the embodiment, the flexible member 5 and the brush rod member 3 are configured such that the weight block 2 can be visible through the flexible member 5 and the brush rod member 3.

[0106] Specifically, the material of the flexible piece 5 can be selected as needed to achieve different visual effects. For example, if only the outline or color of the counterweight 2 is needed to be seen through the flexible piece 5 and the brush rod piece 3, a material with relatively low transparency can be selected; if the details of the side of the counterweight 2 facing the brush rod piece 3 are needed to be seen through the flexible piece 5 and the brush rod piece 3, a material with relatively high transparency can be selected.

[0107] Referring to Figures 4 to 6 , the brush head assembly 100 further comprises a clamping structure 6, which comprises a clamping hook 61 and a clamping groove 62 that cooperate with each other. One of the clamping hook 61 and the clamping groove 62 is arranged on the bristle piece 1, and the other is arranged on the flexible piece 5. The clamping hook 61 is clamped in the clamping groove 62, so that the bristle piece 1 is fixed relative to the flexible piece 5, thereby improving the stability of the toothbrush in use. Moreover, the brush head part of the electric toothbrush 100 can be replaced only by replacing the bristle piece 1 through the clamping structure 6, which is convenient and beneficial to cost saving.

[0108] Referring to Figure 6 , in this embodiment, the clamping hook 61 is arranged on the bristle piece 1, and the clamping groove 62 is arranged on the flexible piece 5. Of course, the positions of the two can also be interchanged.

[0109] Specifically, the flexible piece 5 further comprises an adapter 51 arranged on the outer side of the bristle piece 1 in the circumferential direction. The adapter 51 is arranged around the bristle piece 1 and defines an opening of a receiving cavity 52. The adapter 51 covers the limiting portion 33.

[0110] The clamping groove 62 is arranged on the adapter 51, and the clamping hook 61 is arranged on the bristle piece 1 and protrudes from the bristle piece 1 towards the adapter 51. The clamping hook 61 can be arranged in multiple along the circumferential direction of the bristle piece 1, or can be integrally formed along the circumference of the bristle piece 1. Through the arrangement positions of the clamping hook 61 and the clamping groove 62, the assembly firmness of the brush head as a whole can be improved, the structure is simple, and the installation, disassembly and replacement are convenient. Moreover, water stains and foam can be prevented from entering the installation groove 31 from between the flexible piece 5 and the bristle piece 1.

[0111] In combination Figure 4 and Figure 7 , the bristle piece 1 can also be fixed to the flexible piece 5 by ultrasonic welding, and specifically can be welded to the adapter 51. Through ultrasonic welding, the connection strength of the flexible piece 5 and the bristle piece 1 can be improved, and the matching gap is reduced, so that water stains and foam can be prevented from entering the matching gap to breed bacteria.

[0112] Embodiment 2

[0113] This embodiment also provides a toothbrush. Like the previous embodiment 1, the toothbrush also comprises a brush head assembly 100. The brush head assembly 100 comprises a bristle piece 1, a counterweight 2 and a brush rod piece 3.

[0114] On this basis, the brush head assembly 100 of the present embodiment is basically the same as the previous embodiment 1, and the difference between the two is only that the texture of the texture structure 27 is different.

[0115] Referring to Figure 9 In the present embodiment, the texture of the texture structure 27 is in the form of a grid. In this way, the friction coefficient of the second surface 26 of the weight block 2 can be improved, and the surface adhesion can be greatly improved, thereby reducing the generation of bubbles during injection molding.

[0116] Except for this difference, the rest of the technical content is the same as the previous embodiment 1, and will not be described here.

[0117] Embodiment 3

[0118] The present embodiment also provides a toothbrush. Like the previous embodiment 1, the toothbrush also includes a brush head assembly 100. The brush head assembly 100 includes a bristled member 1, a weight block 2, and a brush stem member 3.

[0119] On this basis, the brush head assembly 100 of the present embodiment is basically the same as the previous embodiment 1, and the difference between the two is only that the texture structure 27 is different. Only the technical content related to the difference will be described below, and the rest of the technical content except for the difference is the same as the previous embodiment 1, and will not be described here.

[0120] Referring to Figure 10 Specifically, in the present embodiment, the texture structure 27 is a texture structure layer 271 attached to the second surface 26. Through the texture structure layer 271, the friction coefficient of the second surface 26 of the weight block 2 can be improved, and the surface adhesion can be greatly improved to reduce the generation of bubbles during injection molding.

[0121] The texture structure layer 271 is attached to the second surface 26 by at least one of sandblasting, electroplating, spraying, and bonding.

[0122] That is, the texture structure layer 271 is at least one of the following structure layers:

[0123] A frosted layer formed on the second surface 26 by sandblasting, a plated layer formed on the second surface 26 by electroplating, a coating layer formed on the second surface 26 by spraying, and a bonding layer attached to the second surface 26 by bonding.

[0124] In this way, not only can the texture structure layer 271 and the second surface 26 have strong bonding force, avoiding the texture structure layer 271 from separating from the second surface 26, but also the roughness and friction coefficient of the second surface 26 can be improved, the surface adhesion can be improved, and the generation of bubbles during injection molding can be reduced.

[0125] When the texture structure layer 271 is attached to the second surface 26 by adhesion, the texture structure layer 271 can be specifically an epoxy adhesive layer, a polyurethane adhesive layer, an acrylic adhesive layer, or a silicone adhesive layer.

[0126] Through the adhesive layer, not only can the adhesion of the colloid to the second surface 26 of the weight block 2 be enhanced, and bubbles and lines be effectively eliminated, but also the epoxy adhesive layer has excellent mechanical properties and chemical resistance, and can maintain stable adhesion under high temperature and harsh environment; the polyurethane adhesive layer has excellent flexibility and impact resistance, and can buffer the vibration during use of the electric toothbrush; the acrylic adhesive layer has the characteristics of rapid curing and high transparency, can reduce the curing time and shorten the production cycle, and has high transparency, which is beneficial to aesthetics; the silicone adhesive layer has excellent high-temperature resistance and aging resistance, and thus has excellent environmental adaptability and stability.

[0127] In summary, the brush head assembly 100 of the present application and the toothbrush having the same can position and assemble the bristle implant member 1 and the weight block 2 through the cooperation of the bristle implant member 1, the weight block 2, and the brush rod member 3, and the layout of the weight block 2 and the bristle implant member 1 arranged at intervals avoids interference of the weight block 2 with the function of the bristle implant member 1, and the interval between them can avoid mutual contamination of the weight block 2, water stains, and the bristle implant member 1 when water stains invade, that is, avoid the rust stains generated by the weight block 2 after long-term use from being transferred to the bristle implant member 1, thereby ensuring safe use of the user; the brush rod member 3 covers at least half of the first surface 21 of the weight block 2, which not only can increase the covering area of the brush rod member 3 and the weight block 2, improve the stability of the assembly structure, and effectively prevent the weight block 2 from loosening or falling off during use, but also the covered part of the brush rod member 3 can further play a protective role, that is, can block the contact of water stains and foam with the weight block 2 during use of the toothbrush, reduce the pollution to the weight block 2, further reduce the breeding of bacteria, ensure oral hygiene, and improve the reliability, installability, and aesthetics of the toothbrush.

[0128] The above describes the structure, features, and effects of the present application in detail according to the embodiments shown in the drawings, and the above description is only a preferred embodiment of the present application, but the present application is not limited to the drawings shown, any change or modification made according to the concept of the present application, or equivalent embodiments with equivalent changes, as long as they do not exceed the spirit of the specification and drawings, should be within the protection scope of the present application.

Claims

1. A brush head assembly, characterized in that, The application relates to a brush head assembly. The brush head assembly comprises: a bristle carrier; a weight block with a first surface close to the bristle carrier; 2. The brush head assembly of claim 1, wherein, a brush stem with a mounting groove at one end, the bristle carrier is arranged in the mounting groove, and the same end is injection molded with the weight block, the weight block is arranged apart from the bristle carrier, and at least half of the first surface is covered by the brush stem.

3. The brush head assembly of claim 1, wherein, The weight block is provided with a fitting part at the periphery of the side close to the bristle carrier, the fitting part is protruded relative to the first surface and extends towards the bristle carrier; and the brush stem covers the fitting part.

4. The brush head assembly of claim 1, wherein, The weight block has a side wall and a bottom wall away from the bristle carrier, the side wall and the bottom wall are arc transition, and the radius of the circle where the arc is located ranges from 1mm to 2mm.

5. The brush head assembly of claim 1, wherein, The weight block is provided with a positioning column at the side close to the bristle carrier, the positioning column protrudes from the first surface towards the bristle carrier.

6. The brush head assembly of claim 5, wherein, The weight block further has a second surface away from the bristle carrier, and the second surface is provided with a texture structure for increasing surface adhesion.

7. The brush head assembly of claim 6, wherein, The texture structure is a protruding texture structure and / or a recessed texture structure integrally formed on the second surface. The texture of the texture structure is in a strip shape, and the extension direction of the texture is parallel to the axial direction of the brush head.

8. The brush head assembly of claim 5, wherein, Alternatively, the texture of the texture structure is in a grid shape.

9. The brush head assembly of claim 8, wherein, The texture structure is a texture structure layer attached to the second surface.

10. The brush head assembly of claim 8, wherein, The texture structure layer is attached to the second surface by at least one of sand blasting, electroplating, spraying and bonding.

11. The brush head assembly of claim 1, wherein, The texture structure layer is attached to the second surface by bonding, and the texture structure layer is an epoxy resin bonding layer, a polyurethane bonding layer, an acrylic bonding layer or a silicone bonding layer.

12. The brush head assembly of claim 1, wherein, The brush stem is a transparent piece.

13. The brush head assembly of claim 12, wherein, Further comprising a flexible piece, the flexible piece covers the periphery of the brush stem, and the flexible piece is a transparent piece.

14. The brush head assembly of claim 12, wherein, Further comprising a clamping structure, the clamping structure comprises a clamping hook and a clamping groove matched with each other, one of the clamping hook and the clamping groove is arranged on the bristle carrier, and the other is arranged on the flexible piece, the clamping hook is clamped in the clamping groove, so that the bristle carrier is fixed relative to the flexible piece.

15. A toothbrush characterized by The bristle carrier is fixed to the flexible piece by ultrasonic welding. The application further relates to a brush head assembly comprising any one of the brush head assemblies according to claims 1-14.

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