Brush head and oral care equipment

Abstract

The brush head comprises a brush rod, a first connecting rod and a second connecting rod which are arranged in the length direction of the brush rod, one end of the second connecting rod is connected with the first connecting rod, the first connecting rod comprises a connecting part and a plurality of connecting rod sections arranged at intervals, and the connecting rod sections are connected through the connecting part; the soft rubber part wraps the connecting rod section and the connecting part, the soft rubber part is provided with a soft rubber front face and a soft rubber back face which are oppositely arranged in the thickness direction, and the thickness direction is perpendicular to the length direction of the brush rod; the hair planting ring is arranged on the front surface of the soft rubber of the soft rubber part; and the bristle cluster comprises a fixed end and a free end, and the fixed end is embedded into the bristle planting ring. Meanwhile, the utility model further discloses oral care equipment applying the brush head, and the technical scheme of the utility model can solve the problem that the inner surfaces of teeth cannot be cleaned in place by the existing brush head.

Description

Technical Field

[0001] The present application relates to the technical field of oral care, and particularly relates to a brush head and an oral care device. Background Art

[0002] In the related art, a toothbrush is used to clean the surfaces of teeth and gums, the area between adjacent teeth (hereinafter referred to as the "interdental area"), and the marginal area between teeth and gums (hereinafter referred to as the "periodontal area"), and to remove dental plaque on the interdental area and the periodontal area. In addition, during the process of brushing teeth, the bristles can produce slight stimulation to the gums, thereby promoting blood circulation in the gums, enhancing the resistance of the gums, preventing gum atrophy and periodontitis. At the same time, it can also enhance the elasticity of the gum tissue, making it wrap around the teeth more tightly and playing a role in protecting the teeth.

[0003] Due to the specific variation in the height of the bristles on the existing toothbrush heads, generally, the bristles on the brush head are in a concave structure. When people use the existing brush head to clean teeth, they can clean the outer surface of the teeth. However, the inner surface of the teeth in the human oral cavity is in an irregular concave shape, which makes it impossible to comprehensively clean the inner surface of the teeth, resulting in the problem that the existing toothbrush heads cannot clean the inner surface of the teeth effectively. Summary of the Utility Model

[0004] Embodiments of the present application provide a brush head and an oral care device, which can solve the problem that the existing brush heads cannot clean the inner surface of the teeth effectively.

[0005] In a first aspect, embodiments of the present application provide a brush head, which includes:

[0006] A brush rod, including a first connecting rod and a second connecting rod arranged along the length direction of the brush rod. One end of the second connecting rod is connected to the first connecting rod. Among them, the first connecting rod includes a connecting portion and a plurality of spaced connecting rod segments, and adjacent connecting rod segments are connected through the connecting portion;

[0007] A soft rubber part, covering the connecting rod segments and the connecting portion. The soft rubber part has a soft rubber front surface and a soft rubber back surface arranged oppositely in the thickness direction, and the thickness direction is perpendicular to the length direction of the brush rod;

[0008] A hair implanting ring, which is arranged on the soft rubber front surface of the soft rubber part;

[0009] A bristle cluster, which includes a fixed end and a free end, and the fixed end is embedded in the hair implanting ring.

[0010] Based on the above embodiments, the cooperation between the link segment and the connecting portion of the first link can be skillfully utilized, so that the first link can be deformed according to the inner and outer surfaces of the teeth, thereby better adjusting the bristle clusters arranged on the first link to better abut and contact the inner and outer surfaces of the teeth. This can not only more effectively clean the inner and outer surfaces of the teeth efficiently, comprehensively and deeply, but also better perform a comprehensive gentle touch massage on the teeth, achieving the purpose of maximizing the prevention of periodontitis.

[0011] In one embodiment, the hardness of the link segment is greater than the hardness of the connecting portion; and / or,

[0012] Along the thickness direction, the thickness of the link segment is greater than the thickness of the connecting portion; and / or,

[0013] Along the width direction, the width of the link segment is greater than the width of the connecting portion, where the width direction, the thickness direction and the length direction are perpendicular to each other in pairs; and / or,

[0014] The width of the connecting portion along the width direction is greater than the thickness of the connecting portion along the thickness direction, where the width direction, the thickness direction and the length direction are perpendicular to each other in pairs.

[0015] With such a setting, under the same external force, the connecting portion of the first link is more likely to bend, ensuring that the bristle clusters of the brush head better fit the tooth surface.

[0016] In one embodiment, the link segment has a link front facing the bristle planting ring and a link back opposite to the link front, and the deformation of the connecting portion can drive the brush rod to bend and deform towards the side where the link front is located and towards the side where the link back is located.

[0017] In one embodiment, the bendable amount of the brush rod bending towards the link front side is less than the bendable amount of the brush rod bending towards the link back side. This allows people to more flexibly operate the brush head 1 of the oral care device when brushing teeth, easily clean all surfaces of the teeth (including the inner surface of the teeth and difficult-to-clean parts such as the rear molars) and the contour of the oral cavity, improving the cleaning effect of the brush head 1. It can also very effectively maintain the neat arrangement of the bristle clusters 14 and a good brushing effect.

[0018] In one embodiment, the link segment has a link front facing the bristle planting ring and a link back opposite to the link front;

[0019] In which, in the thickness direction, the connecting portion does not exceed the front face of the connecting rod, and / or, in the thickness direction, the connecting portion does not exceed the back face of the connecting rod, thereby better ensuring that the thickness of the connecting portion is less than the thickness of the connecting rod segment, thereby effectively improving the stability of the assembly between the soft rubber part and the first connecting rod.

[0020] In one embodiment, in the thickness direction, the distance between the connecting portion and the front surface of the connecting rod is greater than the distance between the connecting portion and the back surface of the connecting rod.

[0021] In one embodiment, the brush rod has a width mid-plane that bisects the brush rod along the width direction, and the width mid-plane passes through the connecting portion, or the width mid-plane is connected to the connecting portion, wherein the width direction and the thickness direction are perpendicular to the length direction and are perpendicular to each other.

[0022] In one embodiment, the brush rod further has a thickness mid-dividing plane bisecting the brush rod along the thickness square, and the thickness mid-dividing plane passes through the connecting portion, or the connecting portion is connected to the thickness mid-dividing plane.

[0023] In one embodiment, the connecting rod segment has a connecting rod front side facing the hair implanting ring and a connecting rod back side opposite to the connecting rod front side. In the length direction, the connecting rod back side is provided with a first notch on the side close to the connecting portion. When the middle part of the first connecting rod is convex and deformed from the side where the connecting rod back side is located toward the side where the connecting rod front side is located, the first notch is used to provide an avoidance space for the connecting rod segment, which not only reduces the difficulty of bending the first connecting rod, but also avoids the risk of dents, cracks or even breakage of the first connecting rod due to local stress concentration caused by forced bending, thereby reducing the self-structural damage of the first connecting rod due to external interference, ensuring the service life of the first connecting rod and the brush head, and at the same time, better controlling the bending angle and shape of the first connecting rod; and / or,

[0024] A second notch is formed between adjacent connecting rod segments. When the middle part of the first connecting rod is convexly deformed from the side where the front of the connecting rod is located toward the side where the back of the connecting rod is located, the second notch is used to provide an avoidance space for the bristle cluster. This not only ensures that the first connecting rod will not have the risk of dents, cracks or even breakage during the bending and deformation process, but also avoids collision between the two connecting rod segments adjacent to the second notch, thereby further preventing damage to the structure of the first connecting rod itself, better ensuring the service life of the first connecting rod and the brush head, and at the same time, more effectively protecting the arrangement of the bristle clusters from disorder, further improving the brushing effect and service life of the bristle clusters and the brush head.

[0025] In one embodiment, reinforcing protrusions are provided on the back surface of the connecting rod, and the reinforcing protrusions are used to strengthen the strength of the connecting rod segment to ensure that the brush head has sufficient structural strength.

[0026] In one embodiment, in the direction from the front surface to the back surface of the connecting rod, the cross-section of the reinforcing protrusion intercepted by a plane perpendicular to the thickness direction gradually decreases, so as to ensure that when the connecting rod segment undergoes bending deformation, the connecting rod segment will not be interfered by the reinforcing protrusion.

[0027] In one embodiment, the connecting rod segments are configured as two. The connecting rod segment for connecting the second connecting rod is defined as the first connecting rod segment, and the connecting rod segment away from the second connecting rod is defined as the second connecting rod segment. The reinforcing protrusion provided on the back surface of the first connecting rod segment is the first reinforcing portion, and the reinforcing protrusion provided on the back surface of the second connecting rod segment is the second reinforcing portion. A first notch is formed between the first reinforcing portion and the second reinforcing portion, and the soft rubber member fills the first notch.

[0028] In one embodiment, the connecting rod segments are configured as three. The connecting rod segment for connecting the second connecting rod is defined as the first connecting rod segment, and the connecting rod segment away from the second connecting rod is the third connecting rod segment. The connecting rod segment located between the first connecting rod segment and the third connecting rod segment is the second connecting rod segment. The reinforcing protrusion provided on the back surface of the first connecting rod segment is the first reinforcing portion, the reinforcing protrusion provided on the back surface of the second connecting rod segment is the second reinforcing portion, and the reinforcing protrusion provided on the back surface of the third connecting rod segment is the third reinforcing portion. First notches are formed between the first reinforcing portion and the second reinforcing portion and between the second reinforcing portion and the third reinforcing portion, and the soft rubber member fills the first notches.

[0029] In one embodiment, the soft rubber member completely covers the reinforcing protrusion.

[0030] In one embodiment, the surface of the reinforcing protrusion away from the first connecting rod is flush with the soft rubber back surface of the soft rubber member.

[0031] In one embodiment, the surface of the first connecting rod away from the second connecting rod is flush with the soft rubber of the soft rubber member or protrudes out of the soft rubber member.

[0032] In one embodiment, the connecting rod segments are configured as three. The connecting rod segment for connecting the second connecting rod is defined as the first connecting rod segment, and the connecting rod segment away from the second connecting rod is the third connecting rod segment. The connecting rod segment located between the first connecting rod segment and the third connecting rod segment is the second connecting rod segment;

[0033] The first link segment has a first link front face facing the hair implanting ring, the second link segment has a second link front face facing the hair implanting ring, and the third link segment has a third link front face facing the hair implanting ring;

[0034] Wherein, the areas of the second link front face, the first link front face, and the third link front face decrease in sequence, such that the first link can adapt to the shape of the human oral cavity, thereby improving the comfort of the brush head during the cleaning process.

[0035] In a second aspect, an embodiment of the present application provides an oral care device, which includes:

[0036] A brush head as described above; and

[0037] A brush handle assembly, wherein the second link is detachably connected to the brush handle assembly.

[0038] Based on the above embodiments, the brush head proposed by the embodiments of the present application includes a brush rod, a soft rubber member, a hair implanting ring, and a tuft of bristles. Among them, the brush rod includes a first link and a second link arranged along the length direction, one end of the second link is connected to the first link. The first link includes a connecting portion and a plurality of spaced link segments, and the plurality of link segments are all connected through the connecting portion. The soft rubber member covers the link segments and the connecting portion. The soft rubber member has a soft rubber front face and a soft rubber back face arranged oppositely in the thickness direction, and the thickness direction is perpendicular to the length direction. The hair implanting ring is arranged on the soft rubber front face of the soft rubber member. The tuft of bristles includes a fixed end and a free end, and the fixed end is embedded in the hair implanting ring.

[0039] Compared with the related art, the technical solution of the present application can realize the deformation of the first link according to the inner and outer surfaces of the teeth through the cooperation of the link segments and the connecting portion of the first link, so as to better adjust the tuft of bristles arranged on the first link to better abut and contact the inner and outer surfaces of the teeth. It can not only more effectively clean the inner and outer surfaces of the teeth efficiently, comprehensively, and deeply, but also better perform a comprehensive gentle touch massage on the teeth, achieving the purpose of preventing periodontitis to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0041] Figure 1 It is a front view schematic diagram of the brush head according to an embodiment of the present utility model;

[0042] Figure 2For Figure 1 Schematic cross-sectional view at A-A in

[0043] Figure 3 The first structural diagram of the brush rod in the present utility model;

[0044] Figure 4 The second structural diagram of the brush rod in the present utility model;

[0045] Figure 5 The overall structural diagram of the brush head in an embodiment of the present utility model;

[0046] Figure 6 The partial exploded view of the brush head in an embodiment of the present utility model;

[0047] Figure 7 The left view schematic diagram of the brush head in an embodiment of the present utility model;

[0048] Figure 8 The left view schematic diagram of the brush rod in the present utility model.

[0049] Explanation of the reference numerals in the drawings:

[0050] 1 - Brush head, 11 - Brush rod, 111 - First connecting rod, 1111 - Connecting part, 1112 - Connecting rod segment, 1113 - Front side of the connecting rod, 1114 - Back side of the connecting rod, 1115 - First notch, 1116 - Second notch, 1117 - Reinforcing protrusion, 1118 - Third notch, 112 - Second connecting rod, 12 - Soft rubber part, 121 - Front side of the soft rubber, 122 - Back side of the soft rubber, 13 - Hair implanting ring, 131 - Hair implanting hole, 14 - Brush hair cluster, 141 - Fixed end, 142 - Free end.

[0051] The realization of the purpose, functional features and advantages of this application will be further described in combination with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0052] To make the purpose, technical solutions and advantages of this application clearer, the following will further describe the embodiments of this application in detail in combination with the accompanying drawings.

[0053] When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with this application. On the contrary, they are only examples of the devices and methods that are consistent with some aspects of this application as detailed in the appended claims.

[0054] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. 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 circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0056] On the one hand, the present application provides an oral care device, including a brush head 1 and a brush handle assembly. The brush head 1 is detachably connected to the brush handle assembly. The brush head 1 is used to extend into the human oral cavity for oral cleaning to ensure the cleanliness of the human oral cavity. The brush handle assembly is used for a human to hold to use the oral care device.

[0057] It should be noted that the above brush handle assembly can be a simple handle housing with only a holding function, preferably made of plastic material, and partially added with rubber material to increase friction and play an anti-slip role. The above brush handle assembly can also be an electric handle that drives the brush head 1 to generate high-frequency vibration or swing through a motor. Specifically, the brush handle assembly includes a housing, a bracket, a motor, and a battery, etc. The motor and the battery are both installed on the bracket to form a movement. The housing has a receiving cavity, and the movement is installed in the receiving cavity to protect the motor and the battery by the housing, thereby reducing the probability of damage to the motor and the battery, so that the motor and the battery can have a longer service life, and thus the oral care device can have a longer service life.

[0058] In this way, when the brush head 1 is connected to the brush handle assembly, the motor of the brush handle assembly outputs a stable vibration or swing frequency to the brush head 1. Then, a human holds the brush handle assembly and moves the brush head 1 to the part to be cleaned in the oral cavity for cleaning for a period of time. The degree of reduction of dental plaque and stains on the surface of human teeth is more significant than that of using a manual toothbrush. Especially for those with poor hand flexibility (such as the elderly or children) or those who have not yet mastered brushing skills proficiently, the cleaning advantage of the electric toothbrush is more obvious.

[0059] As the core solution of this embodiment, specifically, please refer to Figure 1 andFigure 2 As shown, the above-mentioned brush head 1 includes a brush rod 11, a soft rubber part 12, a hair implanting ring 13, and a tuft of bristles 14. Among them, the brush rod 11 includes a first connecting rod 111 and a second connecting rod 112 arranged along the length direction L of the brush rod 11. One end of the second connecting rod 112 is connected to the first connecting rod 111. The connection here is preferably integrally formed for easy processing and production, and can also ensure that the brush rod 11 has good comprehensive performance (such as structural strength, toughness, etc.). The end of the second connecting rod 112 in the length direction L is connected to the output shaft of the above-mentioned motor, so that the output shaft of the motor can drive the brush head 1 to move. Both the first connecting rod 111 and the second connecting rod 112 are made of hard plastic materials to effectively conduct the vibration energy of the motor. Among them, the length direction L of the brush rod 11 is the direction extending along the central axis of the brush rod 11.

[0060] Further, specifically, please refer to Figure 2 、 Figure 3 and Figure 4 As shown, the first connecting rod 111 includes a connecting part 1111 and a plurality of spaced connecting rod segments 1112. The plurality of connecting rod segments 1112 are arranged and distributed along the length direction L. Adjacent connecting rod segments 1112 are connected by the connecting part 1111, that is, there is a connecting part 1111 between adjacent two connecting rod segments 1112. The end of the connecting part 1111 is fixedly connected to the connecting rod segment 1112. Preferably, the connecting part 1111 and the plurality of connecting rod segments 1112 are integrally formed to ensure that the first connecting rod 111 as a whole has good structural strength and toughness, so as to avoid fracture and deformation of the connecting part 1111 and the connecting part 1111 between the connecting part 1111 and the connecting rod segment 1112 under the stress state.

[0061] In this embodiment, specifically, please refer to Figure 5 、 Figure 6 and Figure 7 As shown, the above-mentioned soft rubber part 12 covers the connecting rod segment 1112 and the connecting part 1111. The soft rubber part 12 has a soft rubber front surface 121 and a soft rubber back surface 122 arranged oppositely along the thickness direction T. The above-mentioned hair implanting ring 13 is arranged on the soft rubber front surface 121 of the soft rubber part 12. The number of the hair implanting rings 13 is configured to be multiple. The soft rubber part 12 covers the outside of the hair implanting ring 13 and the soft rubber part 12 fills at least part of the gap between adjacent hair implanting rings 13. The tuft of bristles 14 includes a fixed end 141 and a free end 142. The fixed end 141 of the tuft of bristles 14 is embedded in the hair implanting ring 13, and the free end 142 is used to abut and contact the part to be cleaned in the oral cavity. The thickness direction T is perpendicular to the length direction L of the brush rod 11. The thickness direction T is the direction in which the bristle bundles of the tuft of bristles 14 extend.

[0062] It should be noted that the material of the soft rubber part 12 includes but is not limited to silicone, TPE (thermoplastic elastomer), TPU (thermoplastic polyurethane elastomer rubber), and PVC (polyvinyl chloride). The material of the hair implanting ring 13 can be hard rubber or hard plastic, so that the hair implanting ring 13 can provide support for the brush hair clusters 14. Specifically, the hair implanting ring 13 has hair implanting pores 131, and the fixed ends 141 of the brush hair bundles of the brush hair clusters 14 are inserted into the hair implanting pores 131. Exemplarily, during the production process, the brush hair bundles of the brush hair clusters 14 penetrate through the corresponding hair implanting pores 131, and the fixed ends 141 of the brush hair clusters 14 are melt-fixed to the hair implanting ring 13. Of course, other process procedures that can embed and fix the brush hair clusters 14 on the hair implanting ring 13 are also applicable to this embodiment and can be used as the above-mentioned exemplary conventional replacements.

[0063] Preferably, specifically in combination with Figure 2 , Figure 3 and Figure 4 As shown, the above-mentioned connecting rod segment 1112 has a connecting rod front surface 1113 facing the hair implanting ring 13 and a connecting rod back surface 1114 opposite to the connecting rod front surface 1113. The deformation of the connecting portion 1111 can drive the brush rod 11 to bend and deform towards the side where the connecting rod front surface 1113 is located and towards the side where the connecting rod back surface 1114 is located.

[0064] In this way, during the cleaning process, when the brush hair clusters of the brush head 1 abut against the surface of the human teeth, the brush hair clusters are stressed and the stress is transmitted to the first connecting rod 111, prompting the first connecting rod 111 to deform at the position of the connecting portion 1111, and then driving the connecting segments connected to both ends of the connecting portion 1111 to bend around the connecting portion 1111 until the brush hair clusters are evenly attached to the surface of the human teeth. At this time, the overall stress of the brush hair clusters is balanced, and the bending deformation of the first connecting rod 111 will be adapted to the shape of the teeth. Therefore, the brush hair clusters can better and more comprehensively brush the surface of the teeth, thus better ensuring the cleanliness of the tooth surface.

[0065] As a preferred method of this embodiment, the hardness of the connecting rod segment 1112 is greater than the hardness of the connecting portion 1111, that is, the hardness of the connecting portion 1111 is relatively small. When a force is applied to the first connecting rod 111, due to the small hardness of the connecting portion 1111, the chemical bonds between atoms or molecules inside the connecting portion 1111 are relatively weak, or the arrangement of atoms / molecules makes them easier to move positions under the action of force, and these chemical bonds are more likely to be stretched and compressed. Therefore, under the same external force, the connecting portion 1111 of the first connecting rod 111 is more likely to bend, ensuring that the brush hair clusters of the brush head 1 better fit and conform to the tooth surface.

[0066] As a preferred method of this embodiment, as Figure 3As shown, along the thickness direction T, the thickness of the connecting rod segment 1112 is greater than that of the connecting portion 1111, that is, the thickness dimension of the connecting portion 1111 is relatively small. Then, when subjected to an external force, the bending moment generated inside it to resist bending deformation is relatively small. Optionally, the cross-section of the connecting portion 1111 along the thickness direction T is a rectangular cross-section. According to the bending theory in mechanics of materials, for a material with a rectangular cross-section, the moment of inertia of the cross-section I = bh 3 / 12 (where b is the width and h is the thickness). It can be seen that the influence of the thickness h on the moment of inertia of the cross-section is a cubic relationship. Therefore, when the thickness h decreases, the moment of inertia of the cross-section will decrease significantly, which means that the ability of the connecting portion 1111 to resist bending deformation is weaker than that of the connecting rod segment 1112, and the connecting portion 1111 is more likely to undergo bending deformation.

[0067] It can be understood that when the bristle cluster 14 and / or the first connecting rod 111 are stressed, the connecting portion 1111 undergoes bending deformation. When the bristle cluster 14 and / or the first connecting rod 111 are no longer stressed, the first connecting rod 111 returns to its initial position under the elastic action of the soft rubber member 12. The initial position refers to the position of the first connecting rod 111 when the connecting portion 1111 has not undergone bending deformation.

[0068] Optionally, the cross-section of the connecting portion 1111 along the thickness direction T is a circular cross-section. According to the bending theory in mechanics of materials, for a material with a circular cross-section, the moment of inertia of the cross-section I = πd 4 / 64 (where d is the diameter of the circular cross-section). It can be seen that the influence of the diameter d on the moment of inertia of the cross-section is a quartic relationship. Therefore, when the diameter d decreases, the moment of inertia of the cross-section will decrease significantly, which means that the ability of the connecting portion 1111 to resist bending deformation is weaker than that of the connecting rod segment 1112, and the connecting portion 1111 will also be more likely to undergo bending deformation.

[0069] It can be understood that according to the moment of inertia of the cross-section I = bh 3 / 12 of the material with a rectangular cross-section mentioned above, when the width b decreases, the moment of inertia of the cross-section will also decrease, which can also ensure that the ability of the connecting portion 1111 to resist bending deformation is weakened. Therefore, along the width direction B, the width of the connecting rod segment 1112 is greater than that of the connecting portion 11, and the width direction B, the thickness direction T and the length direction L are perpendicular to each other in pairs, which also ensures that the connecting portion 1111 is more likely to undergo bending deformation. Among them, the width direction B is the direction perpendicular to the plane formed by the thickness direction T and the length direction L.

[0070] As a preferred way of this embodiment, as Figure 3As shown, the width of the connecting portion 1111 in the width direction B is greater than the thickness of the connecting portion 1111 in the thickness direction T, and the width direction B, the thickness direction T and the length direction L are perpendicular to each other pairwise. With such a setting, according to the section moment of inertia I = bh 3 / 12 of the material with a rectangular cross-section mentioned above, a decrease / smaller thickness h will cause a significant decrease in the section moment of inertia, which also means that the ability of the connecting portion 1111 to resist bending deformation in the thickness direction T becomes weaker, and it is more likely to bend and deform in the thickness direction. Secondly, when the connecting portion 1111 is subjected to a bending force, in the thickness direction T, the changes in tensile stress and compressive stress will be more drastic, and it is easier to reach the yield point of the material, resulting in the material being more likely to bend and deform in the thickness direction. In addition, in the width direction B, there may be more directions for the crystal arrangement inside the connecting portion 1111 to resist deformation. While in the thickness direction T, the dimension of the crystal arrangement inside the connecting portion 1111 is relatively small. When subjected to a bending force, the bonds between atoms are more likely to be stretched or compressed in the thickness direction, which also makes the connecting portion 1111 more likely to bend and deform in the thickness direction T.

[0071] It should also be noted that the thickness of the connecting rod segment 1112 being greater than the thickness of the connecting portion 1111 here does not mean that the thickness of any position of the connecting rod segment 1112 is greater than the thickness of any position of the connecting portion 1111, but rather that the thickness of at least one position of the connecting rod segment 1112 is greater than the thickness of at least one position of the connecting portion 1111. Similarly, when referring to the width direction B here, the width of the connecting rod segment 1112 being greater than the width of the connecting portion 1111 does not mean that the width of any position of the connecting rod segment 1112 is greater than the width of any position of the connecting portion 1111, but rather that the width of at least one position of the connecting rod segment 1112 is greater than the width of at least one position of the connecting portion 1111.

[0072] It should be noted that any one of the above four preferred methods can be selected to make the connecting portion 1111 of the first connecting rod 111 more likely to bend and deform. Of course, it is also possible to combine any two of the above four preferred methods, or combine any three of the above four preferred methods, or combine all of the above four preferred methods, all of which can achieve the purpose of making the connecting portion 1111 of the first connecting rod 111 more likely to bend and deform.

[0073] Preferably, the bendable amount of the brush rod 11 bent towards the front side 1113 of the connecting rod of the connecting rod section 1112 is less than the bendable amount of the brush rod 11 bent towards the back side 1114 of the connecting rod of the connecting rod section 1112. On the one hand, this is not only more in line with the requirements of ergonomics. The movement habits of people when brushing their teeth make the back of the brush head 1 easier to bend and more in line with the usage requirements. During the process of brushing teeth, people usually hold the brush handle assembly of the oral care device and then control the brush head 1 of the oral care device through the movements of the wrist and fingers. During this process, the brush rod 11 of the brush head 1 will naturally bear more bending force towards the back side 1114 of the connecting rod. And in order to better fit the shape of the teeth and the contour of the oral cavity for comprehensive and detailed cleaning, therefore, it is reasonable to design the brush rod 11 of the brush head 1 to be more easily bendable towards the back side 1114 of the connecting rod. This allows people to operate the brush head 1 of the oral care device more flexibly when brushing their teeth, easily clean all surfaces of the teeth (including the inner surface of the teeth and the more difficult-to-clean parts such as the molars) and the contour of the oral cavity, and improve the cleaning effect of the brush head 1.

[0074] On the other hand, this will be able to better protect the bristle clusters 14 on the front side 1113 of the connecting rod of the brush head 1. If the front side 1113 of the brush head 1 towards the connecting rod is prone to excessive bending or the bendable amount of the brush rod 11 bent towards the front side 1113 of the connecting rod is large, it will cause the arrangement of the bristle clusters 14 to be disordered, affecting the normal function of the bristle clusters 14. And excessive bending will also cause the fixed ends 141 of the bristle clusters 14 to bear too much stress, shortening the service life of the bristles. Therefore, the bendable amount of the brush rod 11 bent towards the front side 1113 of the connecting rod section 1112 being less than the bendable amount of the brush rod 11 bent towards the back side 1114 of the connecting rod section 1112 will be able to very effectively maintain the neat arrangement of the bristle clusters 14 and good brushing effect.

[0075] In addition, in the thickness direction T, the connecting portion 1111 does not extend beyond the front side 1113 of the connecting rod of the connecting rod section 1112, and / or, in the thickness direction T, the connecting portion 1111 does not extend beyond the back side 1114 of the connecting rod of the connecting rod section 1112, so as to better ensure that the thickness of the connecting portion 1111 is less than the thickness of the connecting rod section 1112, thereby effectively improving the stability of the assembly between the soft rubber part 12 and the first connecting rod 111. Further, in the thickness direction T, the distance between the connecting portion 1111 and the front side 1113 of the connecting rod is greater than the distance between the connecting portion 1111 and the back side 1114 of the connecting rod.

[0076] Preferably, specifically according to Figure 1As shown, the brush rod 11 has a width middle plane BX that bisects the brush rod 11 in the width direction B. The width middle plane BX passes through the connecting portion 1111. Of course, the width middle plane BX can also be in contact with the connecting portion 1111, that is, the end of the connecting portion 1111 close to the second connecting rod 112 intersects with the width middle plane BX, or the side of the connecting portion 1111 close to the width middle plane BX intersects with the width middle plane BX. It should be noted that Figure 1 the cutting line at A-A in

[0077] coincides with the width middle plane BX. Figure 7 and Figure 8 As shown, the brush rod 11 also has a thickness middle plane TX that bisects the brush rod 11 in the thickness direction. The thickness middle plane TX passes through the connecting portion 1111. Of course, the connecting portion 1111 can also be in contact with the thickness middle plane TX, that is, the end of the connecting portion 1111 close to the second connecting rod 112 intersects with the thickness middle plane TX, or the side of the connecting portion 1111 close to the thickness middle plane TX intersects with the thickness middle plane TX.

[0078] It should be added that the surface of the first connecting rod 111 on the side away from the second connecting rod 112 is flush with the soft rubber of the soft rubber part 12 or penetrates through the soft rubber part 12, which can reduce the material of the soft rubber part 12 and the weight of the brush head 1. At the same time, the production cost of the brush head 1 is reduced.

[0079] As a preferred embodiment of this embodiment, specifically in combination with Figure 2 , Figure 3 and Figure 4 As shown, in the length direction L, a first notch 1115 is provided on the side of the back surface of the connecting rod 1114 close to the connecting portion 1111. The first notch 1115 is a groove structure. The back surface of the connecting portion 1111 on the side close to the back surface of the connecting rod 1114 is lower than the back surface of the connecting rod segment 1112 of the connecting rod segment 1112, so that the connecting portion 1111 and the connecting rod segment 1112 cooperate to form the first notch 1115. When the middle part of the first connecting rod 111 bulges and deforms from the side where the back surface of the connecting rod 1114 is located towards the side where the front surface of the connecting rod 1113 is located, the first notch 1115 is used to provide an avoidance space for the connecting rod segment 1112. The bulging deformation here should be understood as the brush rod 11 bending and deforming towards the front surface of the connecting rod 1113, that is, the middle part of the overall structure composed of multiple connecting rod segments 1112 of the first connecting rod 111 bends and deforms towards the front surface of the first connecting rod 111 compared with the two end parts.

[0080] With such a setting, the following unexpected effects will be achieved:

[0081] 1. When the first link 111 is undergoing bending deformation, without the avoidance space provided by the first notch 1115, the first link 111 will collide with the two adjacent link segments 1112. Meanwhile, by utilizing the space allowance provided by the first notch 1115, the bending action of the first link 111 becomes easier. From the perspective of material mechanics, during the bending process of the first link 111, its outer fibers will be stretched and the inner fibers will be compressed. Without the first notch 1115, the surrounding restrictive factors may impede this stretching and compression process. The first notch 1115 is equivalent to providing a sufficient buffer area for the fiber deformation of the first link 111, enabling the first link 111 to more naturally adjust its internal stress distribution during the bending process, thereby reducing the difficulty of bending. It also avoids the risk of dents, cracks, or even fractures in the first link 111 due to local stress concentration caused by forced bending, thus reducing the damage to the self-structure of the first link 111 caused by external interference and ensuring the service life of the first link 111 and the brush head 1.

[0082] 2. Under the action of the first notch 1115, it is also possible to better control the bending angle and shape of the first link 111, that is, to more precisely control the amount / degree of bending of the middle part of the first link 111 protruding from the side where the link back surface 1114 is located towards the side where the link front surface 1113 is located.

[0083] As another preferred embodiment of this example, specifically, please refer to Figure 2 、 Figure 3 and Figure 4 As shown, a second notch 1116 is formed between adjacent link segments 1112. The second notch 1116 is a groove structure. Preferably, the second notch 1116 is formed between the side of the connecting portion 1111 close to the link front surface 1113 and the two adjacent link segments 1112. When the middle part of the first link 111 protrudes from the side where the link front surface 1113 is located towards the side where the link back surface 1114 is located, the second notch 1116 is used to provide an avoidance space for the bristle cluster 14. The protruding deformation here should be understood as the brush rod 11 bending and deforming towards the side of the link back surface 1114, that is, the middle part of the overall structure composed of multiple link segments 1112 of the first link 111 bends and deforms towards the side of the link back surface 111 of the first link 111 compared to the two end parts.

[0084] Furthermore, the soft rubber part 12 can be filled in the second notch 1116. Since the soft rubber part 12 has softness and elasticity, when the avoidance space provided by the second notch 1116 changes, it will squeeze the soft rubber part 12 to deform.

[0085] With such a setting, not only is the risk of dents, cracks, or even fractures in the first link 111 during the bending deformation process eliminated, but also the collision between the two link segments 1112 adjacent to the second notch 1116 is avoided, thus further preventing damage to the structure of the first link 111 itself and better ensuring the service life of the first link 111 and the brush head 1. More importantly, the bristle bundles of the bristle cluster 14 are distributed on both sides of the second notch 1116, providing a clearance space for the bristle cluster 14, more effectively protecting the arrangement of the bristle cluster 14 from being disordered, and further improving the brushing effect and service life of the bristle cluster 14 and the brush head 1.

[0086] It should be noted that either one of the two preferred ways of setting the first notch 1115 and the second notch 1116 can be selected, or the two preferred ways of setting the first notch 1115 and the second notch 1116 can be combined.

[0087] It should also be noted that when the connecting portion 1111 of the first link 111 is arranged close to the back surface 1114 of the link segment 1112, in the state of bending deformation, the connecting portion 1111 and the link segment 1112 will form a complete curved surface.

[0088] As a further preferred way of this embodiment, specifically in combination with Figure 2 、 Figure 3 and Figure 4 as shown, a reinforcing protrusion 1117 is provided on the back surface 1114 of the link segment 1112. The reinforcing protrusion 1117 protrudes and extends from the back surface 1114 of the link segment 1112 towards the side away from the back surface 1114. Preferably, in the direction from the front surface 1113 to the back surface 1114 of the link, the cross-section of the reinforcing protrusion 1117 intercepted by a plane perpendicular to the thickness direction gradually decreases. The reinforcing protrusion 1117 is used to strengthen the strength of the link segment 1112 to ensure that the brush head 1 has sufficient structural strength. At the same time, it also ensures that when the link segment 1112 undergoes bending deformation, the link segment 1112 will not be interfered by the reinforcing protrusion 1117.

[0089] Exemplarily, the above link segment 1112 can be configured as two. The link segment 1112 for connecting the second link 112 is defined as the first link segment, and the link segment 1112 away from the second link 112 is defined as the second link segment. The reinforcing protrusion provided on the back surface 1114 of the first link segment is the first reinforcing portion, and the reinforcing protrusion 1117 provided on the back surface 1114 of the second link segment is the second reinforcing portion. A third notch 1118 is formed between the first reinforcing portion and the second reinforcing portion, and the soft rubber member 12 fills the third notch 1118.

[0090] In addition, specifically in combination with Figure 2 、 Figure 3and Figure 4 As shown, the above-mentioned connecting rod segments 1112 can also be optionally configured as three. The connecting rod segment 1112 defined for connecting the second connecting rod 112 is the first connecting rod segment, the connecting rod segment 1112 far from the second connecting rod 112 is the third connecting rod segment, and the connecting rod segment 1112 located between the first connecting rod segment and the third connecting rod segment is the second connecting rod segment. The reinforcing protrusion 1117 provided on the back surface 1114 of the connecting rod of the first connecting rod segment is the first reinforcing portion, the reinforcing protrusion 1117 provided on the back surface 1114 of the connecting rod of the second connecting rod segment is the second reinforcing portion, and the reinforcing protrusion 1117 provided on the back surface 1114 of the connecting rod of the third connecting rod segment is the third reinforcing portion. Third notches 1118 are formed between the first reinforcing portion and the second reinforcing portion and between the second reinforcing portion and the third reinforcing portion, and the soft rubber member 12 fills the third notches 1118.

[0091] It can be understood that, as Figure 2 shown, the soft rubber member 12 can be optionally completely coated with the reinforcing protrusion 1117, that is, the soft rubber member 12 completely coats the first reinforcing portion, the second reinforcing portion, and the third reinforcing portion. Of course, the surface of the reinforcing protrusion 1117 far from the first connecting rod 111 is flush with the soft rubber back surface 122 of the soft rubber member 12. That is, the soft rubber member 12 coats the first reinforcing portion, the second reinforcing portion, and the third reinforcing portion, and the surfaces of the first reinforcing portion, the second reinforcing portion, and the third reinforcing portion far from the first connecting rod 111 are all flush with the soft rubber back surface 122.

[0092] It should be noted that the way that the soft rubber member 12 completely coats the reinforcing protrusion 1117 can be combined with the way that the surface of the reinforcing protrusion 1117 far from the first connecting rod 111 is flush with the soft rubber back surface 122 of the soft rubber member 12. For example, the soft rubber member 12 completely coats the first reinforcing portion and the second reinforcing portion, and the surface of the third reinforcing portion far from the first connecting rod 111 is flush with the soft rubber back surface 122.

[0093] Furthermore, the first connecting rod segment has a first connecting rod front surface facing the hair implanting ring 13, the second connecting rod segment has a second connecting rod front surface facing the hair implanting ring 13, and the third connecting rod segment has a third connecting rod front surface facing the hair implanting ring 13. Among them, the areas of the second connecting rod front surface, the first connecting rod front surface, and the third connecting rod front surface decrease in sequence, so that the first connecting rod 111 can adapt to the shape of the human oral cavity, thereby improving the comfort of the brush head 1 during the cleaning process.

[0094] The above is the explanation of the brush head proposed in the embodiments of the present application. Since the oral care device proposed in the embodiments of the present application adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0095] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This 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. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0096] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A brush head, characterized in that, include: A brush rod, comprising a first connecting rod and a second connecting rod arranged along the length direction of the brush rod, wherein one end of the second connecting rod is connected to the first connecting rod, wherein the first connecting rod comprises a connecting portion and a plurality of connecting rod segments arranged at intervals, and adjacent connecting rod segments are connected by the connecting portion; a soft rubber member covering the connecting rod segment and the connecting portion, the soft rubber member having a soft rubber front surface and a soft rubber back surface oppositely disposed along a thickness direction, wherein the thickness direction is perpendicular to the length direction of the brush rod; A hair planting ring, the hair planting ring is provided on the soft rubber front side of the soft rubber part; The bristle cluster comprises a fixed end and a free end, and the fixed end is embedded in the bristle planting ring.

2. The brush head according to claim 1, wherein: The hardness of the connecting rod segment is greater than the hardness of the connecting portion; and / or, Along the thickness direction, the thickness of the connecting rod segment is greater than the thickness of the connecting portion; and / or, Along the width direction, the width of the connecting rod segment is greater than the width of the connecting portion, wherein the width direction and the thickness direction are perpendicular to the length direction and are perpendicular to each other; and / or, The width of the connecting portion along the width direction is greater than the thickness of the connecting portion along the thickness direction, wherein the width direction and the thickness direction are perpendicular to the length direction and are perpendicular to each other.

3. The brush head according to claim 1, wherein The connecting rod section has a connecting rod front facing the hair planting ring and a connecting rod back opposite to the connecting rod front. The deformation of the connecting part can drive the brush rod to bend and deform toward the side where the connecting rod front is located and toward the side where the connecting rod back is located.

4. The brush head according to claim 3, wherein, The bendable amount of the brush rod when bent and deformed toward the front side of the connecting rod is smaller than the bendable amount of the brush rod when bent and deformed toward the back side of the connecting rod.

5. The brush head according to claim 1, wherein The connecting rod segment has a connecting rod front side facing the hair implantation ring and a connecting rod back side facing away from the connecting rod front side; Wherein, in the thickness direction, the connecting portion does not extend beyond the front face of the connecting rod; and / or, in the thickness direction, the connecting portion does not extend beyond the back face of the connecting rod.

6. The brush head according to claim 5, wherein, In the thickness direction, a distance between the connecting portion and the front surface of the connecting rod is greater than a distance between the connecting portion and the back surface of the connecting rod.

7. The brush head according to claim 1, wherein, The brush rod has a width mid-plane that bisects the brush rod in the width direction, and the width mid-plane passes through the connecting portion, or the width mid-plane is connected to the connecting portion, wherein the width direction and the thickness direction are perpendicular to the length direction and are perpendicular to each other.

8. The brush head according to claim 1 or 7, characterized in that The brush rod further has a thickness mid-dividing surface that bisects the brush rod along the thickness square. The thickness mid-dividing surface passes through the connecting portion, or the connecting portion is connected to the thickness mid-dividing surface.

9. The brush head according to any one of claims 1 to 6, characterized in that The connecting rod segment has a connecting rod front side facing the hair implantation ring and a connecting rod back side opposite to the connecting rod front side. In the length direction, the connecting rod back side is provided with a first notch on a side close to the connecting portion. When the middle part of the first connecting rod is convexly deformed from the side where the connecting rod back side is located toward the side where the connecting rod front side is located, the first notch is used to provide an escape space for the connecting rod segment; and / or, A second notch is formed between adjacent link segments. When the middle of the first link bulges and deforms from the side where the front of the link is located towards the side where the back of the link is located, the second notch is used to provide a clearance space for the bristle cluster.

10. The brush head according to claim 9, characterized in that, Reinforcing protrusions are provided on the back of the link, and the reinforcing protrusions are used to strengthen the strength of the link segments.

11. The brush head according to claim 10, characterized in that, In the direction from the front of the link to the back of the link, the cross-section of the reinforcing protrusion intercepted by a plane perpendicular to the thickness direction gradually decreases.

12. The brush head according to claim 10 or 11, characterized in that, The link segments are configured as two. The link segment for connecting the second link is defined as the first link segment, and the link segment far from the second link is defined as the second link segment. The reinforcing protrusion provided on the back of the first link segment is the first reinforcing portion, and the reinforcing protrusion provided on the back of the second link segment is the second reinforcing portion. A third notch is formed between the first reinforcing portion and the second reinforcing portion, and the soft rubber member fills the third notch.

13. The brush head according to claim 10 or 11, characterized in that, The link segments are configured as three. The link segment for connecting the second link is defined as the first link segment, and the link segment far from the second link is defined as the third link segment. The link segment located between the first link segment and the third link segment is the second link segment. The reinforcing protrusion provided on the back of the first link segment is the first reinforcing portion, the reinforcing protrusion provided on the back of the second link segment is the second reinforcing portion, and the reinforcing protrusion provided on the back of the third link segment is the third reinforcing portion. Third notches are formed between the first reinforcing portion and the second reinforcing portion and between the second reinforcing portion and the third reinforcing portion, and the soft rubber member fills the third notches.

14. The brush head according to claim 10 or 11, characterized in that, The soft rubber member completely covers the reinforcing protrusion.

15. The brush head according to claim 10 or 11, characterized in that, The surface of the reinforcing protrusion away from the first link is flush with the soft rubber back of the soft rubber member.

16. The brush head according to claim 10 or 11, characterized in that, The surface of the first link away from the second link is flush with the soft rubber of the soft rubber member or protrudes out of the soft rubber member.

17. The brush head according to claim 1, characterized in that The link segments are configured as three. The link segment for connecting the second link is defined as the first link segment, and the link segment far from the second link is the third link segment. The link segment located between the first link segment and the third link segment is the second link segment; The first link segment has a first link front facing the hair implanting ring, the second link segment has a second link front facing the hair implanting ring, and the third link segment has a third link front facing the hair implanting ring; Wherein, the areas of the second link front, the first link front, and the third link front decrease in sequence.

18. An oral care device, characterized in that, Comprising: The brush head according to any one of claims 1 to 17; And A brush handle assembly, wherein the second link is detachably connected to the brush handle assembly.

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