Toothbrush head and electric toothbrush

Abstract

The utility model provides a toothbrush head and an electric toothbrush, comprising a brush rod, the brush rod is provided with a first end and a second end which are opposite in the length direction, the first end is provided with a bracket, and the second end is provided with a connecting seat; the brush head comprises a brush plate, bristles and soft rubber; the brush plate is provided with a third end and a fourth end which are opposite in the length direction, the third end is far away from the bracket, and the fourth end is connected with the bracket; the brush plate and the brush rod are integrally formed in an injection mode, the brush plate is provided with a front face and a back face which are opposite in the thickness direction, the brush plate is further provided with a peripheral face arranged between the front face and the back face, and the front face is provided with bristle planting holes. The bristles are arranged in the bristle planting holes; the soft rubber is located between the bracket and the third end and wraps the peripheral face and at least part of the back face of the brush plate. Due to the design of the bracket, the contact area between the brush plate and the brush rod is increased, the connection strength between the brush rod and the brush plate is greatly improved, meanwhile, due to the fact that the soft rubber is soft, the good cushioning effect can be achieved, and the oral cavity of a user can be effectively protected.

Description

Technical Field

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

[0002] In the related art, the brush plate of the electric toothbrush head is generally made of hard rubber material. In order to improve the user experience and prevent the hard brush plate from colliding with the skin in the oral cavity and causing discomfort when the user is using the toothbrush, an elastic soft rubber is usually wrapped around the hard brush plate. The existing elastic soft rubber usually extends to the brush rod of the toothbrush head. In order to improve the aesthetics of the toothbrush head and make the outer surface of the soft rubber and the outer surface of the brush rod smoothly transition, it is necessary to neck the neck of the existing toothbrush head and then use injection molding to integrate it with the hard brush plate. However, the connection strength of the brush head after necking is greatly weakened and it is easy to break, resulting in great waste. Summary of the invention

[0003] The utility model aims to provide a toothbrush head and an electric toothbrush which are comfortable to use and can ensure connection strength in view of the deficiencies in the prior art.

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

[0005] The brush rod has a first end and a second end opposite to each other in the length direction, the first end has a bracket, and the second end has a connecting seat;

[0006] A brush head, comprising a brush plate, bristles and soft rubber;

[0007] The brush plate has a third end and a fourth end opposite to each other in the length direction, the third end is far away from the bracket, and the fourth end is connected to the bracket; the brush plate and the brush rod are integrally injection molded, the brush plate has a front side and a back side opposite to each other in the thickness direction, the brush plate also has an outer peripheral surface arranged between the front side and the back side, and the front side has a hair planting hole;

[0008] Bristles are disposed in the hair transplanting holes; and

[0009] Soft glue, the soft glue is located between the bracket and the third end, and the soft glue is wrapped around the outer peripheral surface and at least part of the back surface of the brush plate.

[0010] In a specific embodiment, a bracket is provided at the first end of the brush rod, and soft glue is injection-molded between the bracket and the third end of the brush plate. There is no need to perform neck shrinkage treatment on the neck of the existing toothbrush head. The design of the bracket also increases the contact area between the brush plate and the brush rod, greatly improving the connection strength between the brush rod and the brush plate. At the same time, since the material of the soft glue 300 is relatively soft and easy to undergo elastic deformation, it can play a better shock-absorbing role and effectively protect the user's oral cavity.

[0011] Furthermore, the bracket has a concave arc surface that fits with the brush plate. The concave arc surface is arranged in a V shape, and the arm area of ​​the concave arc surface extends toward the brush plate. The design of the concave arc surface increases the contact area between the bracket and the brush plate, making the connection between the brush rod and the brush plate more secure.

[0012] Furthermore, the bracket also includes a circular chamfer arranged on the outside of the concave arc surface. The circular chamfer fits the soft rubber. The surface of the circular chamfer is smooth and has an arc shape, which is conducive to forming a smooth wall surface at the junction of the circular chamfer and the soft rubber, greatly reducing the appearance of burrs at the junction, which is conducive to the injection molding of the soft rubber.

[0013] Furthermore, a neck is provided at the first end of the brush rod, the cross-sectional area of ​​the bracket is larger than the cross-sectional area of ​​the neck, and the bracket is larger in area than the brush rod neck, so that the connection strength between the brush rod neck and the bracket is higher.

[0014] Furthermore, a first arc-shaped groove is provided on the back of the brush plate, and a second arc-shaped groove is provided on the back wrapped with soft rubber and has the same shape as the first arc-shaped groove. Since the brush plate has a certain thickness, and the rubber wrapping on the back of the brush plate also requires a certain thickness, the overall thickness of the brush plate is relatively large, which can easily cause discomfort to the user when brushing teeth. The utility model can reduce the overall thickness of the brush head and improve the comfort of the user when brushing teeth by providing the first arc-shaped groove on the back of the brush plate and the second arc-shaped groove on the back wrapped with soft rubber.

[0015] Furthermore, the thickness of the soft glue ranges from 0.6mm to 2.2mm. The thickness of the soft glue wrapped in the brush plate can be consistent, or it can be designed to be thicker in some areas and thinner in some areas. As long as the overall thickness of the soft glue is in the range of 0.6mm-2.2mm, it is within the protection scope of the present utility model.

[0016] Furthermore, the thickness of the brush head is L1, and the value range of L1 is 6mm-8mm. Within this thickness range, on the one hand, the brush head has a thicker thickness to fix the bristles, so that the bristles are not easy to fall off. On the other hand, the thickness of the brush head is not too large to affect the comfort of brushing.

[0017] Furthermore, a fixing portion is provided on the back of the brush plate, and the fixing portion extends along the length direction of the brush plate. The fixing portion includes an end face and a side wall face, and the soft rubber is completely attached to the side wall face. The fixing portion can increase the contact area between the soft rubber and the back of the brush plate, thereby improving the stability of the soft rubber.

[0018] Furthermore, the outer wall surface of the soft rubber is provided with a plurality of water guiding structures, which include water guiding grooves and water guiding ribs, and the water guiding grooves and water guiding ribs are arranged alternately in sequence. After brushing teeth, there are still a lot of water stains remaining on the brush head. The design of the water guiding grooves and water guiding ribs can guide the water away from the brush head, thereby preventing the toothbrush head from getting moldy or water stains from entering the brush plate through the gaps in the soft rubber.

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

[0020] The utility model provides a toothbrush head and an electric toothbrush, wherein a bracket is arranged at the first end of a brush rod, and soft glue is injection-molded between the bracket and the third end of a brush plate, and there is no need to perform neck shrinkage treatment on the neck of the existing toothbrush head. The design of the bracket also increases the contact area between the brush plate and the brush rod, greatly improving the connection strength between the brush rod and the brush plate, and the toothbrush head is not easily damaged. At the same time, the hardness of the soft glue is less than that of the brush plate and the brush rod, thereby reducing the discomfort caused by the vibration of the electric toothbrush or the damage caused by excessive pressure on the gums, effectively protecting the user's oral cavity, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 A schematic diagram of a toothbrush head according to an embodiment of the present utility model;

[0023] Figure 2 A schematic diagram of a brush rod according to an embodiment of the present utility model;

[0024] Figure 3 The cross-sectional structure of the toothbrush head of the utility model embodiment is shown in FIG. Figure 1 ;

[0025] Figure 4 A schematic diagram of a brush head according to an embodiment of the present utility model;

[0026] Figure 5 This is an exploded schematic diagram of a toothbrush head according to an embodiment of the utility model;

[0027] Figure 6 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0028] Figure 7 It is a schematic diagram of the back side of the brush head of an embodiment of the utility model;

[0029] Figure 8 yes Figure 7 The enlarged schematic diagram of point B in the middle;

[0030] Fig. 9 The cross-sectional structure of the toothbrush head of the utility model embodiment is shown in FIG. Figure 2 ;

[0031] Fig.10 yes Figure 7 The enlarged schematic diagram of the center C;

[0032] Fig.11 This is a schematic diagram of the soft rubber of a toothbrush head according to an embodiment of the present utility model.

[0033] Among them, the figure marks in the figure are: 1000-toothbrush head; 100-brush rod; 101-first end; 102-second end; 103-support seat; 1031-concave arc surface; 1032-circular chamfer; 104-connecting seat; 105-neck; 200-brush head; 201-brush plate; 202-bristles; 203-third end; 204-fourth end; 205-front; 206-back; 207-peripheral surface; 208-implantation hole; 209-first arc-shaped groove; 210-fixing part; 2101-end face; 2102-side wall; 211-groove; 300-soft glue; 301-second arc-shaped groove; 302-water guide structure; 3021-water guide groove; 3022-water guide rib; 303-glue injection hole; 304-protrusion. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0036] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In this regard, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a rotational connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In conjunction with the accompanying drawings, some embodiments of the invention are described in detail with reference to the example of a dental flosser. In the absence of conflict, the following embodiments and features of the embodiments may be combined with each other.

[0039] like Figures 1 to 3 As shown, a toothbrush head 1000 provided by the embodiment of the utility model is applied to an electric toothbrush (not shown in the figure), including a brush rod 100 and a brush head 200, wherein the brush rod 100 has a first end 101 and a second end 102 opposite to each other in the length direction, wherein the first end 101 has a bracket 103, and the second end 102 has a connecting seat 104, and the connecting seat 104 is used to be plugged and connected with the main body of the electric toothbrush. Among them, the thickness of the brush head 200 is L1, and its value range is 6mm-8mm. Within this thickness range, on the one hand, the brush head has a thicker thickness to fix the bristles, and the bristles are not easy to fall off. On the other hand, the thickness of the brush head is not too large to cause a strong foreign body sensation during brushing, and it is difficult to move, affecting the comfort of brushing. The thickness can be any other value among 6.0mm, 6.12mm, 6.35mm, 6.5mm, 6.63mm, 6.8mm, 7mm, 7.1mm, 7.2mm, 7.45mm, 7.77mm, 7.8mm or 8mm. Preferably, in this embodiment, the thickness of the brush head 200 is between 7mm and 7.5mm. This makes the brush head 200 have a more appropriate overall thickness, and after the brush head 200 is placed in the user's mouth, the foreign body sensation can be reduced.

[0040] Combined with Figure 4 The brush head 200 has a brush plate 201, bristles 202 and soft glue 300, wherein the brush plate 201 has a third end 203 and a fourth end 204 opposite to each other in the length direction, the third end 203 is far away from the bracket 103, and the fourth end 204 is connected to the bracket, and the brush plate 201 and the brush rod 100 are integrally injection molded.

[0041] like Figure 4 and Figure 5As shown, the brush plate 201 has a front face 205 and a back face 206 which are opposite to each other in the thickness direction, and also has an outer peripheral surface 207 arranged between the front face 205 and the back face 206. The front face 205 has a hair planting hole 208, and the bristles 202 are arranged in the hair planting hole 208. The soft glue 300 is located between the bracket 103 and the third end 203, and the soft glue 300 is wrapped around the outer peripheral surface 207 and at least part of the back face 206 of the brush plate 201. The soft glue is injected between the bracket 103 and the third end 203 of the brush plate, and there is no need to perform necking treatment on the neck of the existing toothbrush head. The design of the bracket 103 also increases the contact area between the brush plate 201 and the brush rod 100, greatly improving the connection strength between the brush plate 201 and the brush rod 100. At the same time, since the material of the soft glue 300 is relatively soft and is prone to elastic deformation, it can play a good shock-absorbing role and effectively protect the user's oral cavity. The thickness of the soft glue 300 ranges from 0.6mm to 2.2mm. The thickness of the soft glue 300 wrapped around the brush plate 201 can be consistent, or it can be designed to be thicker in some areas and thinner in some areas. As long as the overall thickness of the soft glue 300 is in the range of 0.6mm-2.2mm, it is within the protection scope of the present utility model.

[0042] It should be noted that the injection molding between the soft glue 300 and the brush plate 201 can be performed by secondary injection molding or two-color injection molding on the brush plate 201, and then the brush plate 201 is subjected to a hair transplantation process. Alternatively, when the melting point of the bristles is greater than the melting point of the soft glue 300, the brush plate 201 can be subjected to a hair transplantation process first, and then the soft glue 300 can be injection molded on the brush plate 201. There is no specific limitation on this.

[0043] Shore hardness refers to the reading of the value measured by a Shore durometer. Its unit is degree. There are two description methods, A and D, which represent different hardness ranges. The hardness below 90 degrees is tested with a Shore A durometer and the data is obtained. The hardness of 90 degrees and above is tested with a Shore D durometer and the data is obtained.

[0044] In this embodiment, the Shore hardness of the soft glue 300 is Shore A hardness, and its hardness range is 35 to 45 degrees. In some other embodiments, the hardness of the soft glue 300 can also be set to any other value of 36mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm or 45mm. Preferably, the toothbrush head in this embodiment uses a soft glue with a Shore A hardness of 40, which feels soft and has good elasticity, can avoid a large force hitting the teeth during the process of changing the direction of brushing, and the customer experience is better. Among them, the soft glue 300 can be made of one or more of nitrile rubber (NBR), polysiloxane rubber, natural rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), silicone rubber, EPDM rubber and styrene-butadiene rubber (SBR).

[0045] like Figure 3 and Figure 6 As shown, the bracket 103 has a concave arc surface 1031 that fits with the brush plate 201, and the concave arc surface 1031 is set in a V shape. The arm area of ​​the concave arc surface 1031 extends toward the brush plate 301. The design of the concave arc surface 1031 increases the contact area between the bracket 103 and the brush plate 201, making the connection between the brush rod 100 and the brush plate 201 more secure; the bracket 103 also includes an arc chamfer 1032 arranged on the outside of the concave arc surface 1031, the arc chamfer 1032 and the soft rubber 300 are fitted together, and the surface of the arc chamfer 1032 is smooth and has an arc shape, which is conducive to forming a smooth wall at the junction of the arc chamfer 1032 and the soft rubber 300, greatly reducing the appearance of burrs at the junction, which is conducive to the injection molding of the soft rubber 300.

[0046] Preferably, while ensuring the connection strength between the bracket 103 and the brush plate 201, the concave arc surface 1031 is completely in fit with the shape of the brush plate 201, further improving the aesthetics of the toothbrush head and giving the toothbrush head a streamlined appearance. In other embodiments, the concave arc surface 1031 and the brush plate 201 can also be set to partially fit.

[0047] like Figure 5 and Figure 6 As shown, the brush rod 100 is also provided with a neck 105 on one side close to the first end. Figure 6 It can be seen intuitively that the diameter L2 of the bracket 103 is greater than the diameter L3 of the neck 105. Since the brush rod 100 is designed as a cylindrical shape, the cross-sectional area of ​​the bracket 103 is greater than the cross-sectional area of ​​the neck 105. The bracket 103 is larger than the neck 105, so that the connection strength between the neck 105 of the brush rod and the bracket 103 is higher. At present, the diameter of the neck (including the rubber coating) of the conventional soft rubber brush head is 6mm-6.5mm, while in this embodiment, the soft rubber 300 is only wrapped between the bracket 103 and the third end 203, and the soft rubber does not wrap the position of the neck 105. The material of the neck 105 is hard plastic with high strength, so the neck 105 can be minimized, and the diameter of the neck 105 is between 5.3mm-5.6mm. Preferably, the narrowest diameter of the toothbrush head in this embodiment is 5.48mm. The narrow neck is conducive to the movement and rotation of the brush head 200 on the tooth trajectory in the oral cavity, further reducing the foreign body sensation and discomfort of the user when brushing teeth.

[0048] like Figure 7As shown, the back side 206 of the brush plate 201 is provided with a first arc-shaped groove 209, and the soft glue 300 wraps the back side 206 having a second arc-shaped groove 301 which is consistent with the shape of the first arc-shaped groove 209. Since the brush plate 201 has a certain thickness, and the rubber wrapping of the back side 206 of the brush plate also requires a certain thickness, the overall thickness of the brush plate 201 is large, which can easily cause discomfort to the user when brushing teeth. The utility model provides the first arc-shaped groove 209 on the back side 206 of the brush plate, and soft glue wraps the second arc-shaped groove 301 on the back side, thereby reducing the foreign body sensation in the oral cavity and improving the comfort of the user when brushing teeth.

[0049] like Figure 8 and Fig. 9 As shown, the back side 206 of the brush plate 201 is also provided with a fixing part 210, which extends along the length direction of the brush plate 201. The fixing part 210 includes an end face 2101 and a side wall face 2102. The soft glue 300 is completely attached to the side wall face 2102. The fixing part 210 can increase the contact area between the soft glue 300 and the back side 206 of the brush plate, thereby improving the stability between the brush plate 201 and the soft glue 300, and solving the problem of insufficient bonding force between the soft glue of the toothbrush head and the hard brush plate.

[0050] like Fig.10 As shown, the outer wall surface of the soft glue 300 is provided with a plurality of water guide structures 302, and the side of the soft glue 300 close to the third end 203 is also provided with a glue injection hole 303. During the process of the brush head 200 being coated with glue, the soft glue part 300 is wrapped around the outer peripheral surface and at least part of the back surface of the brush handle 201 through the glue injection hole 303 and the injection mold (not shown in the figure). The water guide structure 302 includes a water guide groove 3021 and a water guide rib 3022, and the water guide groove 3021 and the water guide rib 3022 are arranged alternately in sequence. After brushing teeth, there are still a lot of water stains left on the brush head 200. The design of the water guide groove 3021 and the water guide rib 3022 can guide water away from the brush head 200, so as to prevent the toothbrush head 1000 from getting moldy or water stains from entering the brush plate 201 through the gap of the soft glue 300.

[0051] In the present invention, the water guide groove 3021 and the water guide rib 3022 extend in a curved shape along the length direction of the brush head 200. In other embodiments, they may also extend in a straight line along the length direction of the brush head 200, both of which can play a role in guiding water.

[0052] like Figure 8 and Fig.11 As shown, a groove 211 is provided on the background of the brush plate 201 near the third end 203, and a corresponding protrusion 304 is provided on the inner wall surface of the soft glue 300. The groove 211 and the protrusion 304 are fixed together to further enhance the bonding force between the brush plate 201 and the soft glue 300, so that the soft glue 300 is not easy to fall off the brush plate 201.

[0053] The utility model also provides an electric toothbrush, which includes the toothbrush head 200. The specific structure of the toothbrush head 200 refers to the above embodiment. Since the electric toothbrush adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0054] Compared with the prior art, since the soft glue usually extends to the brush rod of the toothbrush head, in order to improve the aesthetics of the toothbrush head and make the outer surface of the soft glue and the outer surface of the brush rod smoothly transition, it is necessary to neck the neck of the existing toothbrush head and then use injection molding to integrate it with the hard brush plate. However, the connection strength of the brush head after necking is greatly weakened and it is easy to break, resulting in great waste. The utility model provides a toothbrush head and an electric toothbrush, a bracket is arranged at the first end of the brush rod, and soft glue is injected between the bracket and the third end of the brush plate. There is no need to neck the neck of the existing toothbrush head. The design of the bracket also increases the contact area between the brush plate and the brush rod, greatly improving the connection strength between the brush rod and the brush plate. At the same time, since the material of the soft glue is relatively soft and elastic deformation is easy to occur, it can play a good shock-absorbing role and effectively protect the user's oral cavity.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A toothbrush head, characterized in that: include: A brush rod, the brush rod having a first end and a second end opposite to each other in a length direction, the first end having a bracket, and the second end having a connecting seat; A brush head, comprising a brush plate, bristles and soft rubber; A brush plate, the brush plate having a third end and a fourth end opposite to each other in the length direction, the third end being away from the bracket, and the fourth end being connected to the bracket; the brush plate and the brush rod being integrally injection-molded, the brush plate having a front side and a back side opposite to each other in the thickness direction, the brush plate also having an outer peripheral surface arranged between the front side and the back side, and the front side having hair planting holes; Bristles are arranged in the hair-planting holes; as well as Soft glue, the soft glue is located between the bracket and the third end, and the soft glue is wrapped around the outer peripheral surface and at least a portion of the back surface of the brush plate.

2. The toothbrush head according to claim 1, characterized in that: The bracket has a concave arc surface that matches the brush plate, the concave arc surface is arranged in a V shape, and the arm area of ​​the concave arc surface extends toward the brush plate.

3. The toothbrush head according to claim 2, characterized in that: The bracket further includes a circular chamfer arranged on the outer side of the concave arc surface, and the circular chamfer is in contact with the soft rubber.

4. The toothbrush head according to claim 1, characterized in that: The first end of the brush rod is also provided with a neck, and the cross-sectional area of ​​the bracket is larger than the cross-sectional area of ​​the neck.

5. The toothbrush head according to claim 1, characterized in that: The back side of the brush plate is provided with a first arc-shaped groove, and the back side wrapped by the soft glue has a second arc-shaped groove consistent with the shape of the first arc-shaped groove.

6. The toothbrush head according to claim 1, characterized in that: The thickness of the soft glue ranges from 0.6mm to 2.2mm.

7. The toothbrush head according to claim 1, characterized in that: The thickness of the brush head is L1, and the value range of L1 is 6mm-8mm.

8. The toothbrush head according to claim 1, characterized in that: A fixing portion is also provided on the back side of the brush plate. The fixing portion extends along the length direction of the brush plate. The fixing portion includes an end surface and a side wall surface. The soft rubber is completely attached to the side wall surface.

9. The toothbrush head according to claim 1, characterized in that: The outer wall surface of the soft rubber is provided with a plurality of water guiding structures, wherein the water guiding structures include water guiding grooves and water guiding convex ribs, and the water guiding grooves and the water guiding convex ribs are alternately arranged in sequence.

10. An electric toothbrush, characterized in that: Comprising a toothbrush head as described in any one of claims 1-9.

Images