Brush head and electric toothbrush
By setting a hollow structure between the brush plate and the connection surface of the electric toothbrush brush head, the stable connection between the brush plate and the hard rubber is achieved by using laser energy, which solves the problems of welding instability and secondary pollution in the prior art, and achieves a welding effect with low energy loss and high stability.
Patent Information
- Application Number
- CN202421416046.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The welding process of existing electric toothbrush brush heads has problems of unstable energy absorption and secondary pollution, especially the laser welding effect of copper-free hair transplantation process is poor.
A hollow structure is used to set between the brush plate and the connecting surface, and the welding part is melted by laser energy, thereby achieving a stable connection between the brush plate and the hard rubber.
Low energy loss welding is achieved, ensuring stable connection between the brush plate and the hard rubber, simplifying the process flow, reducing implementation costs, and improving the appearance performance of the brush head.
Smart Images
Figure CN222929871U_ABST
Abstract
Description
Technical Field
[0001] The present 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 of their convenient use, labor-saving, and good cleaning power.
[0003] An electric toothbrush drives the brush head to vibrate to clean teeth. However, the current common brush head hair planting processes are mainly divided into copper hair planting and copper-free hair planting. Copper hair planting is prone to oxidation and rust, breeding bacteria, and causing secondary pollution to the oral cavity; while copper-free hair planting is prone to unstable welding effects due to the energy absorption problem of the laser welding process. Utility Model Content
[0004] The present application provides a brush head and an electric toothbrush, which can melt the welding part by the laser energy emitted through the hollow structure to weld the brush plate on the connection surface. Not only is the energy loss low, but also the stability of the connection between the brush plate and the hard rubber part can be ensured; moreover, the structure is simple, the welding is convenient, the implementation cost is low, and the practicability is strong.
[0005] According to the first aspect of the present application, a brush head is provided, which is applied to an electric toothbrush. The brush head includes:
[0006] A brush body for oral cleaning;
[0007] A brush rod includes a hard rubber part and a soft rubber part with a hardness less than that of the hard rubber part. The hard rubber part has a first connection section and a second connection section for connecting with the brush handle of the electric toothbrush. The first connection section is connected to the end of the second connection section far from the connection with the brush handle. The brush body is arranged on the first connection section, and the soft rubber part at least partially wraps around the outside of the hard rubber part;
[0008] Wherein, the brush body includes a brush plate and bristles connected to the brush plate. The first connection section has a rubber-coated surface and a connection surface for laser welding with the brush plate. The soft rubber part includes a first wrapping part wrapped around the outside of the rubber-coated surface. One of the first wrapping part and the brush plate is provided with a hollow structure, and the position of the hollow structure corresponds to the welding part arranged between the brush plate and the connection surface, so that the laser can irradiate on the welding part through the hollow structure to weld the brush plate on the connection surface.
[0009] In the brush head of an embodiment of the present application, the welding part is made of a light-impermeable material and is arranged on one of the brush plate and the connection surface; or,
[0010] The welding part is made of a material with a light-absorbing agent component and is disposed on one of the brush plate and the connection surface.
[0011] In the brush head according to an embodiment of the present application, the hollow structure is formed on the first wrapping part, and a light-transmitting part made of a light-transmitting material is provided on the first connecting section, and the position of the light-transmitting part corresponds to the position of the welding part and the position of the hollow structure; or,
[0012] The hollow structure is formed on the first wrapping part, and a hollow part penetrating through the connection surface and the rubber-coated surface is provided on the first connecting section, and the position of the hollow part corresponds to the position of the welding part and the position of the hollow structure.
[0013] In the brush head according to an embodiment of the present application, the soft rubber part is completely wrapped on the rubber-coated surface, and the hollow structure is formed on the brush plate; or,
[0014] The hollow structure is formed on the first wrapping part, and the height of the hard rubber part exposing the hollow structure is lower than the height of the first wrapping part.
[0015] In the brush head according to an embodiment of the present application, the brush plate has a first surface that cooperates with the connection surface, the welding part is disposed on the first surface, and the hollow structure is formed on the first wrapping part; and / or, the first connecting section is a first connecting section made of a light-transmitting material.
[0016] In the brush head according to an embodiment of the present application, the rubber-coated surface includes a back surface opposite to the connection surface and a side surface connecting the back surface and the connection surface, and the hollow structure is formed outside the back surface and / or outside the side surface.
[0017] In the brush head according to an embodiment of the present application, the hollow structure includes at least two gap holes provided on the first wrapping part, and the at least two gap holes are formed on the outer peripheral side of the first wrapping part; or,
[0018] The hollow structure includes an annular hollow or a plurality of spaced annular hollows provided on the first wrapping part.
[0019] In the brush head according to an embodiment of the present application, the rubber-coated surface has a light-transmitting part protruding toward the hollow structure, and the light-transmitting part is received in the hollow structure and is located inside the first wrapping part.
[0020] In the brush head according to an embodiment of the present application, the minimum distance between the light-transmitting part and the first wrapping part in the thickness direction of the first wrapping part is not less than 0.4 mm.
[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] In the brush head of an embodiment of the present application, the hollow structure includes a through-hole structure provided on the brush plate, and the diameter of the through-hole structure is smaller than the diameter of the planting pores.
[0023] In the brush head of an embodiment of the present application, the brush plate has a first surface and a second surface opposite to the first surface, the bristles are arranged on the brush plate and extend out from the second surface, and the welding part is arranged on the outer edge of the first surface.
[0024] In the brush head of an embodiment of the present application, the maximum width of the hollow structure is not greater than 2 mm.
[0025] In the brush head of an embodiment of the present application, the soft rubber part is coated on the outside of the hard rubber part by a two-shot injection molding process; or, the soft rubber part is coated on the outside of the hard rubber part by a double-color injection molding process.
[0026] In the brush head of an embodiment of the present application, the soft rubber part has an annular convex part extending towards the inner side of the brush body for completely wrapping the circumferential side surface of the brush body.
[0027] In the brush head of 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°.
[0028] In the brush head of an embodiment of the present application, an opening structure is provided at one end of the second connecting section far away from the first connecting section, and a plug for connecting with the brush handle is arranged in the opening structure.
[0029] According to the second aspect of the present application, the present application further provides an electric toothbrush, including a brush handle and the above-mentioned brush head, and the brush head is connected with the brush handle through the brush rod.
[0030] 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 and a brush body for oral cleaning. The brush body includes a brush plate and bristles connected to the brush plate. The brush rod includes a hard rubber part and a soft rubber part. The first wrapping part of the soft rubber part wraps around the outside of the rubber-coated surface, and one of the first wrapping part and the brush plate is provided with a hollow structure. The position of the hollow structure corresponds to the welding part, so that the laser can pass through the hollow structure and be incident on the welding part to weld the brush plate on the connecting surface. This not only has low energy loss and can ensure the stability of the connection between the brush plate and the hard rubber part, but also has a simple structure, is easy to weld, has low implementation cost, and strong practicability. In addition, the welding between two opaque plastics can also be realized, enabling diverse choices for the structures and colors of the brush rod and the brush plate, thereby improving the appearance performance of the brush head.
[0031] 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
[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description 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.
[0033] Figure 1 is a schematic structural diagram of a brush head provided by an embodiment of the present application;
[0034] Figure 2 is Figure 1 a schematic structural diagram of the brush head in
[0035] Figure 3 is Figure 1 a schematic cross-sectional view of the brush head in
[0036] Figure 4 is Figure 1 a schematic exploded view of the brush head in
[0037] Figure 5 is Figure 4 a schematic structural diagram of the hard rubber part in
[0038] Figure 6 is Figure 4 a schematic cross-sectional view of the hard rubber part in
[0039] Figure 7 is Figure 4 a schematic structural diagram of the soft rubber part in
[0040] Figure 8 is Figure 4Exploded view of the soft rubber part therein;
[0041] Figure 9 is Figure 4 Structural schematic diagram of the brush board therein.
[0042] Description of the reference numerals in the drawings:
[0043] 100, brush head;
[0044] 10, brush rod; 11, hard rubber part; 11a, first connecting section; 111a, connecting surface; 112a, rubber-coated surface; 11b, second connecting section; 111, light-transmitting part; 112, opening structure; 12, soft rubber part; 12a, first wrapping part; 121a, back surface; 122a, side surface; 12b, second wrapping part; 121, hollow structure; 122, annular convex part; 13, plug-in part;
[0045] 20, brush body; 21, brush board; 21a, first surface; 21b, second surface; 211, welding part; 212, bristle planting holes; 22, bristles. Detailed implementation manners
[0046] 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.
[0047] It should also be understood that the terms used in the description 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 terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are 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 thus cannot be understood as a limitation of 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.
[0048] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0049] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0050] 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, which is not limited in the present application.
[0051] 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.
[0052] As Figures 1 to 4 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.
[0053] Exemplarily, as Figure 3 , Figure 4 , 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.
[0054] Exemplarily, the brush rod 10 includes a soft rubber member 12 with a hardness less than that of the hard rubber member 11. The soft rubber member 12 at least partially wraps around the outer side of the hard rubber member 11, making the brush rod 10 have a certain elasticity. So as to absorb the kinetic energy generated during the vibration of the electric toothbrush through the soft rubber member 12, making it easier for the brush body 20 to swing relative to the brush rod 10, with a larger swing amplitude. It can also make the contact between the brush rod 10 and the teeth softer, and the movement freedom of the bristles 22 is greater, 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.
[0055] It should be noted that the soft rubber member 12 can be a flexible soft rubber such as silica gel or rubber, and the present application does not limit it.
[0056] In an alternative embodiment, as Figures 4 to 9 shown, the brush body 20 includes a brush plate 21 and bristles 22 connected to the brush plate 21. The first connecting section 11a has a rubber-coated surface 112a and a connecting surface 111a for laser welding with the brush plate 21. The soft rubber member 12 includes a first wrapping portion 12a wrapped around the outer side of the rubber-coated surface 112a. One of the first wrapping portion 12a and the brush plate 21 is provided with a hollow structure 121, and the position of the hollow structure 121 corresponds to the welding portion 211 provided between the brush plate 21 and the connecting surface 111a, so that the laser can irradiate the welding portion 211 through the hollow structure 121 to melt the welding portion 211, enabling the brush plate 21 to be welded to the connecting surface 111a. Not only is the energy loss low, but also the stability of the connection between the brush plate 21 and the hard rubber member 11 can be ensured. Moreover, the structure is simple, the welding is convenient, the implementation cost is low, and the practicability is strong. In addition, the welding between two opaque plastics can also be realized, enabling the structures and colors of the brush rod 10 and the brush plate 21 to have diverse choices, thereby improving the appearance performance of the toothbrush head 100.
[0057] After adopting the above technical solution, since one of the first wrapping portion 12a and the brush plate 21 is provided with a hollow structure 121, the problem of welding the brush plate 21 and the brush rod 10 is solved, and it is not affected by the materials of the brush plate 21 and the soft rubber member 12, especially for the brush plate 21 and the soft rubber member 12 made of opaque materials. Among them, the laser can enter the welding portion 211 from the hollow structure 121, enabling the welding portion 211 to absorb the laser energy and start to melt, and after cooling, the brush plate 21 and the first connecting section 11a are connected as a whole, realizing the welding between the brush plate 21 and the first connecting section 11a. It not only has no special requirements for the materials of the brush plate 21 and the soft rubber member 12, has low energy loss, is easy to implement, and reduces production costs. Moreover, the operation is simple, not affected by the light transmittance of the soft rubber member 12, the product structure and color can have diverse choices, and the appearance performance of the toothbrush head 100 is improved.
[0058] Exemplarily, when the brush plate 21 is welded to the brush rod 10, the laser passes through the hollow structure 121 and is incident on the welding portion 211 between the brush plate 21 and the connection surface 111a, so that the welding portion 211 can absorb the laser energy and melt, so as to connect the brush plate 21 and the first connection section 11a into one body. Among them, the hollow structure 121 can be provided on one of the brush plate 21 and the soft rubber part 12, without considering the light transmittance of the brush plate 21 and the soft rubber part 12, let alone the thickness of the brush plate 21 and the soft rubber part 12, fearing that the excessive thickness of the brush plate 21 and the soft rubber part 12 will reduce their light transmittance. At the same time, the laser passes through the hollow structure 121, and there is no need to worry about the loss of the laser, so that more laser energy is used for welding, thus greatly improving the welding effect of the brush plate 21 and the brush rod 10, and also ensuring the firmness after the brush plate 21 is welded to the hard rubber part 11.
[0059] In an alternative embodiment, the soft rubber part 12 further includes a second wrapping portion 12b, and the second wrapping portion 12b wraps around the outside of the second connection section 11b.
[0060] In an alternative embodiment, the welding portion 211 is made of a light-impermeable material and is provided on one of the brush body 20 and the connection surface 111a, reducing the filling step of the welding portion 211 and also avoiding defects after the brush plate 21 and the first connection section 11a are welded due to insufficient filling.
[0061] In an alternative embodiment, the welding portion 211 is made of a material with a light-absorbing agent component and is provided on one of the brush plate 21 and the connection surface 111a, reducing the filling step of the welding portion 211 and also avoiding defects after the brush plate 21 and the first connection section 11a are welded due to insufficient filling.
[0062] It should be noted that the welding portion 211 may also not be connected to any one of the brush plate 21 and the first connection section 11a, but only filled at the connection position between the brush plate 21 and the connection surface 111a. Its main purpose is to absorb the laser energy incident from the hollow structure 121 and melt, so that the brush plate 21 and the first connection section 11a are connected into one body.
[0063] In an alternative embodiment, as Figures 4 to 8 shown, the hollow structure 121 is formed on the first wrapping portion 12a, and the first connection section 11a has a light-transmitting portion 111 made of a light-transmitting material. The position of the light-transmitting portion 111 corresponds to the position of the welding portion 211 and the position of the hollow structure 121, without affecting the optical path of the laser beam, so that the laser passes through the hollow structure 121 and penetrates from the light-transmitting portion 111 and is incident on the welding portion 211, so that the welding portion 211 can absorb the laser energy at the connection position and start to melt, so as to connect the brush plate 21 and the first connection section 11a, and realize the welding of the brush plate 21 and the first connection section 11a.
[0064] In an alternative embodiment, a hollow structure 121 is formed on the first wrapping portion 12a. A hollow portion penetrating through the connection surface 111a and the overmolding surface 112a is provided on the first connection segment 11a. The position of the hollow portion corresponds to the position of the welding portion 211 and the position of the hollow structure 121, without affecting the optical path of the laser beam, so that the laser sequentially passes through the hollow structure 121 and the hollow portion and then is incident on the welding portion 211, so that the welding portion 211 can start to melt after absorbing the laser energy at the connection position, thereby connecting the brush plate 21 and the first connection segment 11a, and realizing the welding of the brush plate 21 and the first connection segment 11a.
[0065] In an alternative embodiment, the soft rubber member 12 is completely wrapped on the overmolding surface 112a, and the hollow structure 121 is formed on the brush plate 21. This can not only avoid the hard rubber member 11 from bumping against the oral cavity during oral cleaning, but also melt the welding portion 211 through the laser passing through the hollow structure to connect the brush plate 21 and the first connection segment 11a.
[0066] In an alternative embodiment, the hollow structure 121 is formed on the first wrapping portion 12a, and the height of the hard rubber member 11 exposed from the hollow structure 121 is lower than the height of the first wrapping portion 12a, avoiding the hard rubber member 11 from bumping against the oral cavity during oral cleaning.
[0067] In an alternative embodiment, the brush plate 21 has a first surface 21a that cooperates with the connection surface 111a. The welding portion 211 is provided on the first surface 21a, and the hollow structure 121 is formed on the first wrapping portion 12a, so that the laser can be incident on the welding portion 211 from the hollow structure 121, so that the welding portion 211 can start to melt after absorbing the laser energy at the connection position, thereby connecting the brush plate 21 and the first connection segment 11a, and realizing the welding of the brush plate 21 and the first connection segment 11a.
[0068] In an alternative embodiment, the first connection segment 11a is made of a light-transmitting material. So that the laser can pass through the hollow structure 121 and then be transmitted through the first connection segment 11a and be incident on the welding portion 211, so that the welding portion 211 can start to melt after absorbing the laser energy at the connection position, thereby connecting the brush plate 21 and the first connection segment 11a, and realizing the welding of the brush plate 21 and the first connection segment 11a. The structure is simple and convenient for the processing of the first connection segment 11a.
[0069] In an alternative embodiment, the overmolded surface 112a includes a back surface 121a disposed opposite to the connection surface 111a and side surfaces 122a connecting the back surface 121a and the connection surface 111a. The hollow structure 121 is formed on the outside of the back surface 121a and / or the outside of the side surfaces 122a so that the laser can enter the welding portion 211 through the back surface 121a and / or the side surfaces 122a, enabling the welding portion 211 to absorb the laser energy and melt to weld the brush plate 21 and the first connection segment 11a together.
[0070] In an alternative embodiment, the hollow structure 121 includes at least two gaps provided on the first wrapping portion 12a, and the at least two gaps are formed on the outer peripheral side of the first wrapping portion 12a. Alternatively, the hollow structure includes an annular hollow or a plurality of spaced-apart annular hollows provided on the first wrapping portion. Among them, the diameter of the gap and the width of the annular hollow are very small, which can be 0.5 mm, so as not to affect the wrapping of the soft rubber part 12 around the first connection segment 11a, and can also improve the shock absorption effect of the first connection segment 11a during oral cleaning to avoid direct contact between the first connection segment 11a and the teeth.
[0071] In an alternative embodiment, as Figures 3 to 6 shown, the overmolded surface 112a has a light-transmitting portion 111 protruding towards the hollow structure 121. The light-transmitting portion 111 is received in the hollow structure 121 and is located inside the first wrapping portion 12a, preventing the light-transmitting portion 111 from directly hitting the teeth during brushing and playing a shock-absorbing role.
[0072] In an alternative embodiment, the minimum distance L between the light-transmitting portion 111 and the first wrapping portion 12a in the thickness direction of the first wrapping portion 12a is not less than 0.4 mm, ensuring that when the software body undergoes buffer deformation, the light-transmitting portion 111 does not protrude above the outer surface of the light-transmitting portion 111, avoiding direct contact with the teeth during brushing to ensure the shock absorption effect of the brush head 100.
[0073] In an alternative embodiment, as Figure 3 、 Figure 4 and Figure 9 shown, the brush plate 21 is provided with implant pores 212, and the roots of the bristles 22 are disposed in the implant pores 212 and fixed to the brush plate 21 by a hot melt process. This not only has a simple structure and low production cost, but also has a reliable and stable connection. Among them, the implant pores 212 can be of irregular shapes, and the present application does not limit them.
[0074] In an alternative embodiment, the brush plate 21 has a first surface 21a and a second surface 21b opposite to the first surface 21a. The bristles 22 are arranged on the brush plate 21 and extend from the second surface 21b for scraping teeth. Among them, the welding part 211 is arranged on the outer edge of the first surface 21a, and the bristles 22 are located inside the outer edge of the first surface 21a. This can not only avoid the bristles 22 on the first surface 21a, but also make the welding between the first surface 21a and the first connecting section 11a more stable, so as to improve the welding effect.
[0075] In an alternative embodiment, the welding part 211 is a convex structure arranged on the outer edge of the first surface 21a, and the height of the convex structure is less than the thickness of the brush plate 21, so that the convex structure can quickly absorb laser energy, thereby completing the welding of the laser brush plate 21 and the first connecting section 11a.
[0076] In an alternative embodiment, the bristles 22 form bristle bundles, and the bristle bundles are connected to the implant pores 212 at intervals. In other words, there is an interval between adjacent bristle bundles, and this interval can provide a 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, it is also convenient to clean the food residues between adjacent bristle bundles.
[0077] When the first connecting section 11a transmits the vibration of the brush handle of the electric toothbrush 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 brush 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 deform during brushing, the bristles 22 can better fit the teeth and effectively scrape the teeth.
[0078] In an alternative embodiment, the hollow structure 121 includes a through-hole structure arranged on the brush plate 21, and the diameter of the through-hole structure is smaller than the diameter of the implant pores 212. This will not only not affect the appearance of the brush plate 21 and the brush head 100, but also enable the laser to pass through the brush plate 21 to achieve the welding of the brush plate 21 and the first connecting section 11a.
[0079] In an alternative embodiment, the maximum width D of the hollow structure 121 is not greater than 2 mm, which will not affect the overall appearance of the brush head 100; at the same time, it will not affect the wrapping of the soft rubber part 12, making the wrapping of the soft rubber part 12 more sufficient, and can also improve the shock absorption effect of the first connecting section 11a during oral cavity cleaning, avoiding direct collision between the first connecting section 11a and the teeth.
[0080] In an alternative embodiment, the hard rubber part 11 and / or the brush plate 21 are made of a hard material to improve the transmission efficiency. Exemplarily, the hard rubber part 11 and / or the brush plate 21 can be prepared from plastic materials such as acrylonitrile-butadiene-styrene (ABS) or polycarbonate (PC).
[0081] When the soft rubber part 12 wrapped around the hard rubber part 11 and / or the brush plate 21 collides with the inner wall of the oral cavity (such as teeth or gums, etc.) in the oral cavity, since the soft rubber part 12 is a flexible structure, the soft rubber part 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 avoiding the hard brush plate 21 and the hard rubber part 11 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 part 12 is less than that of the hard rubber part 11 and / or the brush plate 21. Exemplarily, the soft rubber part 12 can be prepared from at least one soft material such as thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer (TPU), rubber material, silica gel, etc.
[0082] It can be understood that if the hardness of the soft rubber part 12 is too small, it cannot well cover the hard rubber part 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 part 12 is too large, it cannot produce a good shock absorption effect.
[0083] In some embodiments, the hardness of the soft rubber part 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.
[0084] In an alternative embodiment, the soft rubber part 12 is covered on the outside of the hard rubber part 11 through a secondary 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 outside 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.
[0085] In an alternative embodiment, the soft rubber part 12 is covered on the outside of the hard rubber part 11 through a two-color injection molding process, so that the injection molded brush rod 10 can be formed by two materials. This not only ensures the sealing between the soft rubber part 12 and the hard rubber part 11, but also improves the production efficiency of the brush rod 10, facilitates assembly, and improves the assembly efficiency.
[0086] In an alternative embodiment, the soft rubber part 12 has an annular convex part 122 extending towards the inner side of the brush body 20, which is used to completely wrap the circumferential side surface 122a of the brush body 20, so as to achieve lateral sealing between the hard rubber part 11 and the brush plate 21, prevent liquid from entering the hard rubber part 11 along the side wall of the brush plate 21 during the cleaning process, and avoid the phenomenon that the liquid accumulates in the hard rubber part 11 for a long time, resulting in the mildew and bad smell of the brush head 100. At the same time, the annular convex part 122 can also play a role in buffering and shock absorption for the brush head 100.
[0087] In an alternative embodiment, the thickness of the soft rubber part 12 is 0.4 - 1.2 mm. The soft rubber part 12 wraps around part of the outer peripheral surfaces of the hard rubber part 11 and the brush plate 21. Since the shapes of the hard rubber part 11 and the brush plate 21 are different, it is easy to cause the thickness of the soft rubber part 12 wrapped around the hard rubber part 11 and the brush plate 21 to be inconsistent, with some areas being thicker and some areas being thinner. Therefore, as long as the overall thickness of the soft rubber part 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.
[0088] In an alternative embodiment, the hardness of the soft rubber part 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.
[0089] In an alternative embodiment, as Figure 2 and Figure 3 shown, the second connecting section 11b is provided with an opening structure 112 at one end far from the first connecting section 11a, and a plug-in part 13 is arranged in the opening structure 112, and the plug-in part 13 is used to connect with the brush handle.
[0090] As Figures 1 to 9 shown, according to the second aspect of the present application, an electric toothbrush provided by the present application includes a brush handle and the above-mentioned brush head 100, and the brush head 100 is connected to the brush handle through the brush rod 10 of the brush head 100.
[0091] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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. It 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.
[0092] In this application, unless otherwise clearly stipulated and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not 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 that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0093] The foregoing 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 merely 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 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.
[0094] In the description of this specification, the description with reference to terms such as "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 embodiments or examples 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 can be combined in a suitable manner in any one or more embodiments or examples.
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 and a soft plastic part with a hardness smaller than that of the hard plastic part, wherein the hard plastic part has a first connecting section and a second connecting section for connecting to a brush handle of an electric toothbrush, wherein the first connecting section is connected to an end of the second connecting section away from the end connected to the brush handle, wherein the brush body is arranged on the first connecting section, and the soft plastic part at least partially covers the outer side of the hard plastic part; Among them, the brush body includes a brush plate and bristles connected to the brush plate, the first connecting section has a rubber-coated surface and a connecting surface for laser welding with the brush plate, the soft rubber part includes a first wrapping portion wrapped around the outside of the rubber-coated surface, and one of the first wrapping portion and the brush plate is provided with a hollow structure, and the position of the hollow structure corresponds to a welding portion arranged between the brush plate and the connecting surface, so that the laser can be irradiated on the welding portion through the hollow structure to weld the brush plate to the connecting surface.
2. The brush head according to claim 1, characterized in that: The welding portion is made of a light-proof material and is disposed on one of the brush plate and the connecting surface; 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 connecting surface.
3. The brush head according to claim 1, characterized in that: The hollow structure is formed on the first wrapping portion, the first connecting section has a light-transmitting portion made of a light-transmitting material, and the position of the light-transmitting portion corresponds to the position of the welding portion and the position of the hollow structure; or, The hollow structure is formed on the first wrapping portion, and the first connecting section is provided with a hollow portion penetrating the connecting surface and the rubber-coated surface, and the position of the hollow portion corresponds to the position of the welding portion and the position of the hollow structure.
4. The brush head according to claim 1, characterized in that: The soft plastic part is completely wrapped on the plastic surface, and the hollow structure is formed on the brush plate; or, The hollow structure is formed on the first wrapping portion, and a height of the hard plastic member exposed from the hollow structure is lower than a height of the first wrapping portion.
5. The brush head according to claim 1, characterized in that: The brush plate has a first surface that matches the connecting surface, the welding portion is arranged on the first surface, and the hollow structure is formed on the first wrapping portion; and / or the first connecting section is a first connecting section made of a light-transmitting material.
6. The brush head according to claim 1, characterized in that: The rubber-coated surface includes a back surface arranged opposite to the connecting surface and a side surface connected between the back surface and the connecting surface, and the hollow structure is formed outside the back surface and / or outside the side surface.
7. The brush head according to claim 1, characterized in that: The hollow structure includes at least two gap holes arranged on the first wrapping portion, and the at least two gap holes are formed on the outer peripheral side of the first wrapping portion; or, The hollow structure includes an annular hollow or a plurality of annular hollows spaced apart from each other and arranged on the first wrapping portion.
8. The brush head according to claim 7, characterized in that: The rubber-wrapped surface has a light-transmitting portion protruding toward the hollow structure, and the light-transmitting portion is accommodated in the hollow structure and located on the inner side of the first wrapping portion.
9. The brush head according to claim 8, characterized in that: A minimum distance between the light-transmitting portion and the first wrapping portion along a thickness direction of the first wrapping portion is not less than 0.4 mm.
10. 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.
11. The brush head according to claim 10, characterized in that: The hollow structure includes a through-hole structure arranged on the brush plate, and the diameter of the through-hole structure is smaller than the diameter of the hair implantation hole.
12. The brush head according to claim 10, characterized in that: The brush plate has a first surface and a second surface opposite to the first surface. The bristles are arranged on the brush plate and extend from the second surface. The welding portion is arranged on the outer edge of the first surface.
13. The brush head according to claim 1, characterized in that: The maximum width of the hollow structure is no more than 2 mm.
14. The brush head according to claim 1, 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.
15. The brush head according to claim 1 or 14, characterized in that: The soft rubber part has an annular protrusion extending toward the inner side of the brush body, and is used for completely wrapping the peripheral side surface of the brush body.
16. The brush head according to claim 1, characterized in that: 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°.
17. An electric toothbrush, characterized in that: It comprises a brush handle and a brush head as claimed in any one of claims 1 to 16, wherein the brush head is connected to the brush handle through the brush rod.