Brush head and electric toothbrush

Abstract

The brush head is applied to the electric toothbrush, the brush head comprises a brush rod and a brush body used for cleaning an oral cavity, the brush rod comprises a hard rubber piece, the hard rubber piece is provided with a first connecting section and a second connecting section used for being connected with a brush handle of the electric toothbrush, and the first connecting section is connected to the end, away from the end connected with the brush handle, of the second connecting section. The brush body is arranged on the first connecting section; wherein the brush body comprises a brush plate and bristles connected to the brush plate, a welding part is arranged between the brush plate and the first connecting section, the first connecting section is provided with an outer peripheral surface corresponding to the connecting position of the brush plate and the first connecting section, and at least one of the brush plate and the outer peripheral surface can transmit light to the welding part; therefore, the welding part can be subjected to hot melting through the brush plate and / or laser penetrating through the peripheral face of the outer edge, the brush plate is connected with the first connecting section, more laser energy is used for welding, the energy loss is low, and the stability of connection between the brush plate and the hard rubber piece is ensured.

Description

Technical Field

[0001] This application relates to the technical field of oral cleaning, and particularly to a brush head and an electric toothbrush. Background Art

[0002] With the improvement of people's living standards, more and more people pay attention to personal cleaning and health. Electric toothbrushes are favored by many users because they are convenient and labor-saving to use, and have good cleaning power.

[0003] An electric toothbrush cleans teeth by driving the brush head to vibrate. However, the current common brush head hair implanting processes are mainly divided into copper hair implanting and copper-free hair implanting. Copper hair implanting is prone to oxidation and rust, breeding bacteria, and causing secondary pollution to the oral cavity; while copper-free hair implanting is prone to unstable welding effects due to the energy absorption problem of the laser welding process. Utility Model Content

[0004] This application provides a brush head and an electric toothbrush, which can weld the brush plate and the first connection section together through the brush plate and / or the outer edge circumferential surface, enabling more laser energy to be used for welding with low energy loss to ensure the stability of the connection between the brush plate and the hard rubber part.

[0005] According to the first aspect of this application, a brush head is provided for use in an electric toothbrush, the brush head comprising:

[0006] A brush body for cleaning the oral cavity;

[0007] A brush rod including a hard rubber part, the hard rubber part having a first connection section and a second connection section for connecting to the brush handle of the electric toothbrush, the first connection section being connected to the end of the second connection section far from the connection with the brush handle, and the brush body being disposed on the first connection section;

[0008] Wherein, the brush body includes a brush plate and bristles connected to the brush plate, a welding part is provided between the brush plate and the first connection section, the first connection section has an outer edge circumferential surface corresponding to the connection position of the brush plate and the first connection section, and at least one of the brush plate and the outer edge circumferential surface can transmit light to the welding part, so that the welding part can be melted by the laser passing through the brush plate and / or the outer edge circumferential surface to weld the brush plate and the first connection section.

[0009] In the brush head of an embodiment of this application, at least part of the brush plate is made of a light-transmitting material to form a light-transmitting part, and the position of the light-transmitting part corresponds to the position of the welding part, so that the laser can pass through the light-transmitting part to melt the welding part.

[0010] In the brush head according to an embodiment of the present application, the light-transmitting part is integrally formed with the brush plate; or the brush plate is a brush plate made of a light-transmitting hard rubber material, and the light-transmitting part is a partial structure of the brush plate.

[0011] In the brush head according to an embodiment of the present application, the width dimension of the welding part is greater than the width dimension of the light-transmitting part.

[0012] In the brush head according to an embodiment of the present application, the welding part is exposed from the connection position of the brush plate and the first connection section; and / or, the hard rubber part is a hard rubber part made of a light-transmitting hard rubber material.

[0013] In the brush head according to an embodiment of the present application, the brush rod includes a soft rubber part with a hardness less than that of the hard rubber part. The soft rubber part is coated on the outer side of the hard rubber part and at least part of the circumferential side surface of the brush plate, and at least part of the soft rubber part is a light-transmitting structure or a hollow structure, so that the laser can pass through the light-transmitting structure or the hollow structure to melt the welding part.

[0014] In the brush head according to an embodiment of the present application, the soft rubber part is a soft rubber part made of a light-transmitting material, and the light-transmitting structure is a partial structure of the soft rubber part facing the welding part.

[0015] In the brush head according to an embodiment of the present application, the soft rubber part is coated on the outer side of the hard rubber part by a two-shot injection molding process; or, the soft rubber part is coated on the outer side of the hard rubber part by a two-color injection molding process.

[0016] In the brush head according to an embodiment of the present application, the soft rubber part has an annular convex part extending towards the inner side of the brush plate, which is used to completely wrap the circumferential side surface of the brush plate and the partial structure of the brush plate located outside the bristles.

[0017] In the brush head according to an embodiment of the present application, the first connection section has an opposite rubber-coated surface and a butt joint surface. The brush plate is connected to the butt joint surface, and the soft rubber part is completely wrapped on the rubber-coated surface.

[0018] In the brush head according to an embodiment of the present application, the thickness of the soft rubber part is 0.4 - 1.2 mm; and / or, the hardness of the soft rubber part is 35° - 70°.

[0019] In the brush head according to an embodiment of the present application, the welding part is made of an opaque material and is provided on one of the brush plate and the first connection section; or,

[0020] The welding part is located on one of the brush plate and the first connection section and is made of a material containing a light-absorbing agent component.

[0021] In the brush head of an embodiment of the present application, planting pores are provided on the brush plate, and the roots of the bristles are arranged in the planting pores and fixed on the brush plate by a hot melting process.

[0022] According to the second aspect of the present application, the present application also provides an electric toothbrush, including a brush handle and the above-mentioned brush head, and the brush head is connected to the brush handle through the brush rod of the brush head.

[0023] The technical solution provided by the embodiment of the present application may include the following beneficial effects: The present application designs a brush head and an electric toothbrush, including a brush rod with a hard rubber part and a brush body for oral cleaning. The brush body includes a brush plate and bristles connected to the brush plate. A welding part is provided between the first connection section of the brush plate and the hard rubber part. The first connection section has an outer peripheral surface corresponding to the connection position of the brush plate and the first connection section, so that at least one of the brush plate and the outer peripheral surface can transmit light to the welding part, so that the laser can perform hot melting on the welding part through the brush plate and / or the outer peripheral surface to connect the brush plate and the first connection section into one body, reducing the laser passing through the dielectric layer, enabling more laser energy to be used for welding, with low energy loss, to ensure the stability of the connection between the brush plate and the hard rubber part.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a schematic structural diagram of a brush head provided by an embodiment of the present application;

[0027] Figure 2 is Figure 1 a schematic cross-sectional view of the brush head in;

[0028] Figure 3 is Figure 1 a schematic exploded view of the brush head in;

[0029] Figure 4 is Figure 3 a schematic structural diagram of the hard rubber part in;

[0030] Figure 5 is Figure 3 a schematic cross-sectional view of the hard rubber part in;

[0031] Figure 6 is Figure 3Schematic structural diagram of the soft rubber part therein;

[0032] Figure 7 is Figure 3 Exploded schematic diagram of the soft rubber part therein;

[0033] Figure 8 is Figure 3 Schematic structural diagram of the brush board therein.

[0034] Explanation of reference numerals in the drawings:

[0035] 100, brush head;

[0036] 10, brush rod; 11, hard rubber part; 11a, first connecting section; 111a, docking surface; 112a, rubber-coated surface; 11b, second connecting section; 111, welding part; 112, opening structure; 113, outer peripheral surface; 12, soft rubber part; 12a, first wrapping part; 12b, second wrapping part; 121, light-transmitting structure; 122, annular convex part; 13, plug-in part;

[0037] 20, brush body; 21, brush board; 21a, connecting surface; 21b, outer surface; 211, bristle implantation holes; 22, bristles. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0039] It should also be understood that the terms used in the specification of the present application are only for the purpose of describing specific realities. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0040] The following will combine with the accompanying drawings to make a detailed description of some embodiments of the present application. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0041] Please refer to Figure 1 , Figure 1 , which is a schematic diagram of the brush head 100 provided by an embodiment of the present application. The brush head 100 can be applied to various electric toothbrushes; of course, the brush head 100 can also be used independently or applied to an ordinary non-powered toothbrush, and the present application does not limit this.

[0042] Among them, the electric toothbrush has a driving power. When the brush head 100 is applied to the electric toothbrush, the brush head 100 can be connected to the brush handle of the electric toothbrush, so as to drive the brush head 100 to vibrate through the brush handle to achieve oral cleaning.

[0043] As Figures 1 to 3 shown, according to the first aspect of the present application, a brush head 100 provided by the present application includes a brush rod 10 and a brush body 20 for oral cleaning. The brush body 20 is connected to one end of the brush rod 10, and the other end of the brush rod 10 is detachably connected to one end of the brush handle of the electric toothbrush, so that the user can drive the brush body 20 to move by holding the brush handle, thereby completing the brushing action.

[0044] Exemplarily, as Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, the brush rod 10 includes a hard rubber part 11. The hard rubber part 11 has a first connection section 11a and a second connection section 11b for connecting to the brush handle of the electric toothbrush. The first connection section 11a is connected to the end of the second connection section 11b far from the connection with the brush handle. The brush body 20 is arranged on the first connection section 11a, so that the second connection section 11b can transmit the power of the brush handle to the first connection section 11a, and then transmit it to the brush body 20 through the first connection section 11a, so that the brush body 20 can move relative to the brush handle, thereby ensuring the cleaning effect of the brush body 20 on the oral cavity.

[0045] In an alternative embodiment, the brush body 20 includes a brush plate 21 and bristles 22 connected to the brush plate 21. A welding portion 111 is provided between the brush plate 21 and the first connecting section 11a. The first connecting section 11a has an outer peripheral surface 113 corresponding to the connection position between the brush plate 21 and the first connecting section 11a. At least one of the brush plate 21 and the outer peripheral surface 113 can transmit light to the welding portion 111, so that the welding portion 111 can be melted by the laser passing through the brush plate 21 and / or the outer peripheral surface 113, and the brush plate 21 and the first connecting section 11a can be connected into one body, reducing the laser passing through the dielectric layer, enabling more laser energy to be used for welding, with low energy loss, to ensure the stability of the connection between the brush plate 21 and the hard rubber part 11.

[0046] It should be noted that the outer peripheral surface 113 refers to the outer peripheral side of the first connecting section 11a corresponding to the connection position between the first connecting section 11a and the brush plate 21. The outer peripheral surface 113 may or may not be covered by the soft rubber part 12. When the outer peripheral surface 113 is covered by the soft rubber part 12, the outer peripheral surface 113 may be part of the structure of the soft rubber part 12, which is not limited in this application.

[0047] After adopting the above technical solution, since at least one of the brush plate 21 and the outer peripheral surface 113 can transmit light to the welding portion 111, the problem of welding the brush plate 21 and the brush rod 10 is effectively solved, and it is not affected by the thickness and light transmittance of the brush rod 10. If the thickness of the brush rod 10 is too large, it is likely to reduce the light transmittance of the brush rod 10, enabling the structure and color of the brush rod 10 to have diverse selections, improving the appearance performance of the brush head 100.

[0048] When the brush plate 21 and the brush rod 10 are welded, the laser can penetrate the brush plate 21 and be incident on the welding portion 111 between the brush plate 21 and the first connecting section 11a, enabling the welding portion 111 to absorb the laser energy and melt, so as to connect the brush plate 21 and the first connecting section 11a into one body. Among them, the brush plate 21 can be made of a hard rubber material with a relatively high light transmittance, or it is sufficient that part of the structure of the brush plate 21 is made of a hard rubber material with a relatively high light transmittance, to reduce the energy loss after the laser passes through the brush plate 21 and enable more laser energy to be used for welding. In addition, the brush plate 21 is mainly used to fix the bristles 22, and its thickness can be appropriately adjusted according to the focal length of the laser and the strength of the laser welding energy, etc., so that the laser can be incident on the welding portion 111 with the shortest optical path, reducing the laser passing through the dielectric layer and reducing energy loss, greatly improving the welding effect.

[0049] Alternatively, when the brush plate 21 is welded to the brush rod 10, the laser can be incident on the welding part 111 between the brush plate 21 and the first connecting section 11a from the outer peripheral surface 113, so that the welding part 111 can absorb the laser energy and then melt to connect the brush plate 21 and the first connecting section 11a into one body. Wherein, a soft rubber part 12 with light transmission or hollowing can be arranged on the outer peripheral surface 113 of the first connecting section 11a, or no other components can be arranged on the outer peripheral surface 113 of the first connecting section 11a, so that the laser can pass through the soft rubber part 12 from the outer peripheral surface 113 or directly be incident on the welding part 111 between the brush plate 21 and the first connecting section 11a, and the welding part 111 starts to melt after absorbing the laser energy at the connecting position of the brush plate 21 and the first connecting section 11a, so as to connect the brush plate 21 and the first connecting section 11a into one body, realizing the welding between the brush plate 21 and the first connecting section 11a. In this way, not only can the optical path of the laser be shortened, but also the laser passes through fewer dielectric layers or even does not need to pass through dielectric layers, thereby reducing energy loss and greatly improving the welding effect.

[0050] In an alternative embodiment, the welding part 111 can be arranged on at least one of the brush plate 21 and the first connecting section 11a, or the welding part 111 can be not connected to any of the brush plate 21 and the first connecting section 11a, but only filled at the connecting position of the brush plate 21 and the first connecting section 11a, and its main purpose is to absorb the laser energy incident from at least one of the brush plate 21 and the outer peripheral surface 113, so that the brush plate 21 and the first connecting section 11a are connected into one body.

[0051] In an alternative embodiment, as Figure 3 and Figure 8 shown, the brush plate 21 has a light-transmitting part made of at least partially light-transmitting material, and the position of the light-transmitting part corresponds to the position of the welding part 111, so that the laser can pass through the light-transmitting part to thermally melt the welding part 111, and the brush plate 21 and the first connecting section 11a are connected into one body, realizing the welding between the brush plate 21 and the first connecting section 11a.

[0052] Exemplarily, the brush plate 21 is provided with a through-hole structure at a position opposite to the welding part 111. The through-hole structure is filled with a light-transmitting material to form a light-transmitting part, so that the laser can pass through and be incident on the welding part 111, causing the welding part 111 to start melting after absorbing the laser energy at the connection position between the brush plate 21 and the first connecting section 11a, and connecting the brush plate 21 and the first connecting section 11a into one body after cooling, thereby realizing the docking between the brush plate 21 and the first connecting section 11a. Among them, the through-hole structure can be square, circular, or even an irregular V shape or trumpet shape; at the same time, according to different types of through-hole structures, the way of filling the light-transmitting material can also be appropriately adjusted. Among them, for the V-shaped through-hole structure and the trumpet-shaped through-hole structure, their openings are larger than the bottoms, which is convenient for filling the opaque material into the through-hole structure.

[0053] In an alternative embodiment, the light-transmitting part is integrally formed with the brush plate 21, so that there is no seam between the light-transmitting part and the brush plate 21, thereby avoiding dirt and the like from remaining on the surface of the brush plate 21 and eliminating the risk of bacteria generation.

[0054] In an alternative embodiment, the brush plate 21 is made of a light-transmitting hard rubber material, and the light-transmitting part is a partial structure of the brush plate 21, so that there is no seam between the light-transmitting part and the brush plate 21, thereby avoiding dirt and the like from remaining on the surface of the brush plate 21 and eliminating the risk of bacteria generation.

[0055] In an alternative embodiment, the width dimension of the welding part 111 is larger than the width dimension of the light-transmitting part, which will not affect the overall appearance structure of the brush plate 21, and at the same time, it can allow the laser to pass through to perform hot melting on the welding part 111.

[0056] In an alternative embodiment, the welding part 111 is exposed from the connection position between the brush plate 21 and the first connecting section 11a, so that the laser can be incident on the welding part 111 from the outer edge circumferential surface 113 to perform hot melting on the welding part 111, and there is no need to limit the colors of the brush plate 21 and the first connecting section 11a.

[0057] In an alternative embodiment, the hard rubber part 11 is made of a light-transmitting hard rubber material to expand the range of the outer edge circumferential surface 113, so that the laser can pass through the hard rubber part 11 from the peripheral side and be incident on the welding part 111 to perform hot melting on the welding part 111.

[0058] In an alternative embodiment, the extending direction of the light-transmitting part is directly opposite to the welding part 111, so that the energy of the laser is concentrated on the welding part 111, enabling more laser energy to be used for welding, increasing the absorption rate of the welding part 111 to the laser, reducing energy loss, and greatly improving the welding effect.

[0059] In an alternative embodiment, as Figure 3 、Figure 6 and Figure 7 As shown in Figure 7 , the brush rod 10 includes a soft rubber part 12 with a hardness less than that of the hard rubber part 11. The soft rubber part 12 is coated on the outer side of the hard rubber part 11 and at least part of the circumferential side surface of the brush plate 21, and at least part of the soft rubber part 12 is a light-transmitting structure 121 or a hollow structure, so that the laser can pass through the light-transmitting structure 121 or the hollow structure to melt the welding part 111. Among them, the soft rubber part 12 can be a flexible soft rubber such as silica gel or rubber, so that the brush rod 10 has a certain elasticity, so as to absorb the kinetic energy generated when the electric toothbrush vibrates through the soft rubber part 12, so that the bristles 22 can swing more easily relative to the brush rod 10, and the swing amplitude is also larger. It can also make the contact between the brush rod 10 and the teeth softer, and the movement freedom of the bristles 22 is also larger, which is beneficial to improving the cleaning effect; at the same time, it can also prevent the first connecting section 11a from colliding with the teeth, thereby improving the comfort of the user when brushing teeth.

[0060] In an optional embodiment, the first connecting section 11a has a rubber-coated surface 112a and a docking surface 111a for laser welding with the brush body 20. The soft rubber part 12 includes a first wrapping part 12a and a second wrapping part 12b. The first wrapping part 12a is wrapped on the outer side of the rubber-coated surface 112a, and the docking surface 111a is exposed from the first wrapping part 12a for welding the brush plate 21; the second wrapping part 12b is wrapped on the outer side of the second connecting section 11b.

[0061] In an optional embodiment, the soft rubber part 12 completely wraps the rubber-coated surface 112a to prevent the hard rubber part 11 from bumping into the oral cavity during oral cleaning, so as to improve the user experience.

[0062] In an optional embodiment, the soft rubber part 12 is a soft rubber part made of a light-transmitting material, and the light-transmitting structure 121 is a partial structure of the soft rubber part 12 facing the welding part 111, so that the laser can be incident on the welding part 111 through the light-transmitting structure 121, so that the welding part 111 absorbs laser energy at the connection position between the brush plate 21 and the first connecting section 11a and starts to melt, and after cooling, the brush plate 21 and the first connecting section 11a are connected into one body, thereby realizing the docking between the brush plate 21 and the first connecting section 11a.

[0063] In an optional embodiment, the soft rubber part 12 is coated on the outer side of the hard rubber part 11 by a two-shot injection molding process, that is, the hard rubber part 11 is injection molded for the first time, and then the soft rubber part 12 is injection molded for the second time on the basis of the hard rubber part 11 injection molded for the first time, and the soft rubber part 12 can be wrapped on the outer side of the hard rubber part 11 and fixed together with the hard rubber part 11. This can not only ensure the sealing between the soft rubber part 12 and the hard rubber part 11, but also improve the production efficiency of the brush rod 10, facilitate assembly, and improve the assembly efficiency.

[0064] In an alternative embodiment, the hard rubber member 11 and / or the brush plate 21 are made of a hard material to improve the transmission efficiency. Exemplarily, the hard rubber member 11 and / or the brush plate 21 can be prepared from plastic materials such as acrylonitrile-butadiene-styrene (ABS) or polycarbonate (PC).

[0065] When the soft rubber member 12 wrapped around the hard rubber member 11 and / or the brush plate 21 collides with the inner wall of the oral cavity (such as teeth or gums) in the oral cavity, since the soft rubber member 12 is a flexible structure, the soft rubber member 12 can play a buffering role, reducing the impact force of the brush head 100 colliding with the skin or teeth in the oral cavity, and preventing the relatively hard brush plate 21 and the hard rubber member 11 from directly touching the gums, teeth or other positions in the oral cavity during use, thus improving the user experience. Exemplarily, the hardness of the soft rubber member 12 is less than that of the hard rubber member 11 and / or the brush plate 21. Exemplarily, the soft rubber member 12 can be prepared from at least one soft material such as thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer (TPU), rubber material, silicone rubber, etc.

[0066] It can be understood that if the hardness of the soft rubber member 12 is too small, it cannot well cover the hard rubber member 11 and / or the brush plate 21, and air bubbles are likely to be generated during the covering process. If the hardness of the soft rubber member 12 is too large, a good shock absorption effect cannot be produced.

[0067] In some embodiments, the hardness of the soft rubber member 12 ranges from 35° to 70°, such as 35°, 50°, 70° or any other suitable value between 35° and 70°, so as to balance the good covering effect and shock absorption effect.

[0068] In an alternative embodiment, the soft rubber member 12 is covered on the outside of the hard rubber member 11 through a two-color injection molding process, so that the injection-molded brush rod 10 can be formed by two materials, which not only ensures the sealing between the soft rubber member 12 and the hard rubber member 11, but also improves the production efficiency of the brush rod 10, facilitates assembly, and improves the assembly efficiency.

[0069] In an alternative embodiment, the brush plate 21 is made of a light-transmitting hard rubber material or has a light-transmitting part, and the soft rubber member 12 can be made of a fully transparent, semi-transparent or solid-color material.

[0070] In an alternative embodiment, the soft rubber member 12 has an annular convex portion 122 extending towards the inner side of the brush plate 21, which is used to completely wrap the circumferential side surface of the brush plate 21 and the part of the brush plate 21 located outside the bristles 22, so as to achieve the lateral sealing of the hard rubber member 11 and the brush plate 21, prevent liquid from entering the hard rubber member 11 along the side wall of the brush plate 21 during the cleaning process, and also avoid the phenomenon that the liquid accumulates in the hard rubber member 11 for a long time and causes the brush head 100 to become moldy and smelly; at the same time, the annular convex portion 122 can also play a role in buffering and shock absorption for the brush head 100.

[0071] In an alternative embodiment, the thickness of the soft rubber member 12 is 0.4 - 1.2 mm. The soft rubber member 12 wraps around part of the outer circumferences of the hard rubber member 11 and the brush plate 21. Since the shapes of the hard rubber member 11 and the brush plate 21 are different, it is likely to cause inconsistent thicknesses of the soft rubber member 12 wrapped around various parts of the hard rubber member 11 and the brush plate 21, with some areas being thicker and some areas being thinner. Therefore, as long as the overall thickness of the soft rubber member 12 is within the range of 0.4 - 1.2 mm, the elastic performance of the brush rod 10 can be ensured, and at the same time, it can also play a role in buffering and shock absorption.

[0072] In an alternative embodiment, the hardness of the soft rubber member 12 is 35° - 70°, which can play a role in shock absorption, protect the teeth, and improve the comfort of the user when brushing teeth.

[0073] In an alternative embodiment, as Figures 3 to 5 shown, the welding part 111 is made of an opaque material and is provided on one of the brush plate 21 and the first connection section 11a, reducing the filling steps of the welding part 111 and also avoiding defects after welding the brush plate 21 and the first connection section 11a due to insufficient filling.

[0074] In an alternative embodiment, the welding part 111 is located on a material made of a material with a light-absorbing agent component and is provided on one of the brush body 20 and the first connection section 11a, reducing the filling steps of the welding part 111 and also avoiding defects after welding the brush plate 21 and the first connection section 11a due to insufficient filling.

[0075] In an alternative embodiment, as Figure 3 、 Figure 4 and Figure 8 shown, the welding part 111 includes a convex structure provided on the first connection section 11a. The brush plate 21 has a connection surface 21a, and the connection surface 21a is connected to the convex structure, enabling the brush plate 21 to be welded to the first connection section 11a together.

[0076] In an alternative embodiment, the brush plate 21 has an outer surface 21b relative to the connection surface 21a. The bristles 22 are provided on the brush plate 21 and extend from the outer surface 21b for scraping the teeth.

[0077] In an alternative embodiment, the brush plate 21 is provided with planting pores 211. The roots of the bristles 22 are arranged in the planting pores 211 and fixed on the brush plate 21 through a hot melting process. This is not only simple in structure and low in production cost but also reliable and stable in connection. Among them, the planting pores 211 can be of irregular shapes, and the present application does not limit them.

[0078] In an alternative embodiment, the bristles 22 form bristle bundles which are connected to the bristle implantation holes 211 at intervals. In other words, there is an interval between adjacent bristle bundles, which provides a clearance space for the bending of adjacent bristle bundles, facilitating the deformation of the bristle bundles according to the shape of the oral cavity, so that the bristle bundles can better fit the teeth, etc., and at the same time facilitating the cleaning of food residues between adjacent bristle bundles.

[0079] When the first connecting section 11a transmits the vibration of the toothbrush handle to the brush plate 21, the brush plate 21 drives the bristle bundles to vibrate. That is to say, the first connecting section 11a can transmit the vibration of the toothbrush handle to the brush plate 21, and the brush plate 21 can transmit the vibration of the first connecting section 11a to the bristle bundles. Since the bristle bundles can be deformed during brushing, the bristles 22 can better fit the teeth and effectively scrape the teeth.

[0080] In an alternative embodiment, the convex structure is provided around the outer edge or near the outer edge of the first connecting section 11a, and the bristles 22 are located inside the convex structure when the brush plate 21 is connected to the first connecting section 11a. This can not only provide clearance for the bristles 22 on the connecting surface 21a, but also make the welding of the connecting surface 21a and the first connecting section 11a more stable, so as to improve the welding effect.

[0081] In an alternative embodiment, the height of the convex structure is not greater than 1 mm, so that the connection between the brush plate 21 and the first connecting section 11a is stable and the brush body is not damaged.

[0082] In an alternative embodiment, as Figure 2 and Figure 3 shown, an opening structure 112 is provided at one end of the second connecting section 11b away from the first connecting section 11a, and a plug-in member 13 is arranged in the opening structure 112 for connecting with the toothbrush handle.

[0083] As Figures 1 to 8 shown, according to the second aspect of the present application, an electric toothbrush provided by the present application includes a toothbrush handle and the above-mentioned toothbrush head 100, and the toothbrush head 100 is connected to the toothbrush handle through the brush rod 10 of the toothbrush head 100.

[0084] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0085] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0086] The above disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure of this application, components and settings of specific examples are described above. Of course, they are only examples and are not intended to limit this application. In addition, this application may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A brush head, used for an electric toothbrush, characterized in that: The brush head comprises: Brush body, used for cleaning the oral cavity; A brush rod, comprising a hard plastic part, the hard plastic part having a first connecting section and a second connecting section for connecting to a handle of an electric toothbrush, the first connecting section being connected to an end of the second connecting section away from the end connected to the handle, and the brush body being arranged on the first connecting section; In which, the brush body includes a brush plate and bristles connected to the brush plate, a welding portion is arranged between the brush plate and the first connecting section, the first connecting section has an outer edge circumferential surface corresponding to the connection position of the brush plate and the first connecting section, and at least one of the brush plate and the outer edge circumferential surface can transmit light to the welding portion, so that the welding portion can be hot-melted by the laser passing through the brush plate and / or the outer edge circumferential surface and connect the brush plate to the first connecting section.

2. The brush head according to claim 1, characterized in that: The brush plate has a light-transmitting portion at least partially made of a light-transmitting material, and the position of the light-transmitting portion corresponds to the position of the welding portion, so that laser can pass through the light-transmitting portion to perform heat melting on the welding portion.

3. The brush head according to claim 2, characterized in that: The light-transmitting portion is integrally formed with the brush plate; or the brush plate is made of a light-transmitting hard plastic material, and the light-transmitting portion is a partial structure of the brush plate.

4. The brush head according to claim 2, characterized in that: The width of the welding portion is greater than the width of the light-transmitting portion.

5. The brush head according to claim 1, characterized in that: The welding portion is exposed from the connection position between the brush plate and the first connecting section; and / or, The hard plastic part is made of a light-transmitting hard plastic material.

6. The brush head according to claim 1, characterized in that: The brush rod includes a soft plastic part with a hardness lower than that of the hard plastic part. The soft plastic part is coated on the outer side of the hard plastic part and at least part of the peripheral side of the brush plate. At least part of the soft plastic part is a light-transmitting structure or a hollow structure so that the laser can pass through the light-transmitting structure or the hollow structure to heat-melt the welding part.

7. The brush head according to claim 6, characterized in that: The soft plastic part is made of a light-transmitting material, and the light-transmitting structure is a partial structure of the soft plastic part facing the welding part.

8. The brush head according to claim 6, characterized in that: The soft plastic part is coated on the outside of the hard plastic part by a secondary injection molding process; or, the soft plastic part is coated on the outside of the hard plastic part by a two-color injection molding process.

9. The brush head according to claim 6, characterized in that: The soft rubber part has an annular protrusion extending toward the inner side of the brush plate, which is used for completely wrapping the peripheral side surface of the brush plate and the partial structure of the brush plate located outside the bristles.

10. The brush head according to claim 6, characterized in that: The first connecting section has a rubber-wrapped surface and a butt joint surface that are arranged opposite to each other, the brush plate is connected to the butt joint surface, and the soft rubber part is completely wrapped on the rubber-wrapped surface.

11. The brush head according to claim 6, characterized in that: The thickness of the soft rubber part is 0.4 mm-1.2 mm; and / or the hardness of the soft rubber part is 35°-70°.

12. The brush head according to any one of claims 1 to 11, characterized in that: The welding portion is made of an opaque material and is disposed on one of the brush plate and the first connecting section; or, The welding portion is made of a material having a light absorbent component and is arranged on one of the brush plate and the first connecting section.

13. The brush head according to claim 1, characterized in that: The brush plate is provided with a hair planting hole, and the roots of the bristles are arranged in the hair planting hole and fixed on the brush plate through a hot melt process.

14. An electric toothbrush, characterized in that: It comprises a brush handle and a brush head as claimed in any one of claims 1 to 13, wherein the brush head is connected to the brush handle via a brush rod of the brush head.

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