A brush head and toothbrush

Abstract

This application discloses a brush head and a toothbrush. The brush head includes a brush head body and a bristle structure. The brush head body has a bristle-embedded surface, a dorsal surface, and a peripheral surface. The dorsal surface faces away from the bristle-embedded surface, and the peripheral surface is located between the bristle-embedded surface and the dorsal surface, and is connected to both the bristle-embedded surface and the dorsal surface. The bristle structure is disposed on the brush head body and includes multiple bristles extending outward from the bristle-embedded surface. On a plane perpendicular to the length direction of the brush head, the outer contour line of the orthographic projection of the dorsal surface and / or the peripheral surface is a smoothly extending arc, and the dorsal surface and the peripheral surface are smoothly connected, as are the peripheral surface and the bristle-embedded surface. This makes the toothbrush more comfortable to use and easier for children to use.

Description

Technical Field

[0001] This application relates to the field of oral hygiene equipment technology, and more particularly to a brush head and a toothbrush. Background Technology

[0002] A toothbrush is a device used for oral cleaning. When using a toothbrush to clean your mouth, you need to insert the toothbrush head into your mouth and use the bristles on the brush head to clean the tooth surfaces and the inner walls of your mouth, thereby achieving oral cleaning.

[0003] However, in existing brush heads, the brush head body is usually cuboid in shape, resulting in sharp edges at the joints of the various outer surfaces. Furthermore, to ensure the bristles are securely attached, the brush head body typically needs sufficient thickness for bristle insertion. Since the thickness of a cuboid brush head is usually uniform, its volume is generally large. Children's mouths are typically smaller, causing the outer surface of the brush head to make close contact with the inner walls of their mouths during oral cleaning. Children often brush their teeth haphazardly and irregularly, and the sharp edges can easily collide and scrape against the tooth surfaces and inner walls of the mouth during back-and-forth brushing and changes in brushing angle, potentially causing oral damage. Utility Model Content

[0004] This application provides a brush head and toothbrush that are more comfortable to use and easier for children to use.

[0005] In a first aspect, this application provides a brush head, the brush head comprising: The brush head body has a bristle-planting surface, a back side surface, and an outer peripheral side surface. The back side surface is disposed opposite to the bristle-planting surface, and the outer peripheral side surface is located between the bristle-planting surface and the back side surface, and is connected to the bristle-planting surface and the back side surface. A bristle structure is disposed on the brush head body, the bristle structure comprising a plurality of bristles extending outward from the bristle-planting surface; Wherein, on a plane perpendicular to the length direction of the brush head, the outer contour line of the orthographic projection of the back side and / or the outer peripheral side is a smoothly extending arc, and the back side and the outer peripheral side are smoothly connected, and the outer peripheral side is smoothly connected to the bristle-planting surface.

[0006] In some embodiments of this application, the surface perpendicular to the length direction of the brush head is a longitudinal section, and the outer contour line of the plane formed by the intersection of the brush head body and any of the longitudinal sections is a smoothly extending arc. Based on the above scheme, the outer peripheral side and back side of the brush head are all smoothly extending arc shapes, and different areas of the outer side of the brush head body are connected or composed by rounded arc corners or arc surfaces, so that there are no areas with obvious abrupt changes in curvature on the outer side. This makes the outer side generally form a surface with integrity, ensuring that there are no sharp areas, protruding edges, or areas with obvious height changes on the outer side of the brush head body that affect the integrity of the outer side, thereby further reducing the discomfort caused to the user when brushing teeth.

[0007] In some embodiments of this application, on a plane perpendicular to the length direction of the brush head, the outer contour line of the orthographic projection of the outer peripheral side is a first contour line, the outer contour line of the orthographic projection of the back side is a second contour line, and the outer contour line of the orthographic projection of the bristle-embedded surface is a third contour line. The first contour line includes a top protrusion. The distance between any point on the second contour line and the center line of the orthographic projection along the width direction of the brush head is K1; the distance between any point on the third contour line and the center line along the width direction of the brush head is K2; the distance between the top protrusion and the center line along the width direction of the brush head is K3; and the distance between any point on the first contour line (excluding the top protrusion) and the center line along the width direction of the brush head is K4. K1 < K3, K2 < K3, K4 < K3, and the area on the outer peripheral side corresponding to the top protrusion is a convex smooth curved surface. This design ensures that the outermost convex point (top protrusion) of the brush head is located on the outer peripheral side, making the top protrusion the only protruding position of the brush head in the width direction. This avoids the discomfort caused by multiple protruding positions and also helps reduce the probability of contact with the oral cavity wall, thus reducing discomfort. Moreover, this embodiment makes it easy to design a large-rounded arc surface structure at the single protrusion point, alleviating the discomfort caused by protruding positions in the oral cavity.

[0008] In some embodiments of this application, the first contour line includes a first endpoint and a second endpoint. The first contour line intersects the second contour line at the first endpoint, and the first contour line intersects the third contour line at the second endpoint. The apex is located between the first endpoint and the second endpoint. Specifically, on the first contour line, K4 gradually decreases from the apex towards the first endpoint; K4 gradually decreases from the apex towards the second endpoint; on the second contour line, K1 gradually decreases from the first endpoint towards the intersection of the second contour line and the center line; and on the third contour line, K3 gradually decreases from the second endpoint towards the intersection of the third contour line and the center line. The above embodiment makes the top protrusion the only protruding position of the brush head in the width direction; in addition, the distance between the first contour line and the center of the brush head along the width direction first increases and then decreases, so that the size of the brush head body along the width direction can gradually decrease from the top protrusion to the second end point. While avoiding the corner parts on both sides of the cube-shaped brush head body along the width direction in the prior art, the volume of the brush head body can be further reduced, making the brush head easier to insert into the human mouth, further reducing the discomfort to the user, and thus making it more suitable for children to use.

[0009] In some embodiments of this application, the continuous curve on the first contour line that at least partially includes the top protrusion is a tapered line, and the curvature of the tapered line gradually increases in the direction away from the first endpoint. The tapered line is formed by the trajectory line of closely spaced circles on the curve, and the curvature of the tapered line gradually decreases from the starting point to its ending point. Specifically, in this embodiment, the curvature of the first contour line gradually increases in the direction away from the first endpoint, that is, the curvature of the first contour line gradually decreases in the direction close to the bristle surface, so that the brush head body has a shape that tapers towards the middle of the brush head from the back side to the bristle surface, which can further reduce the overall volume of the brush head body and further reduce the discomfort to the user; in addition, the tapered line can form a large arc-angle surface, making it easier to form a large arc-angle surface on the outer peripheral side, thereby making it easier for the outer peripheral side to extend smoothly from the back side to the bristle surface, thus making it easier to eliminate any sharp corner structures that may exist on the outer peripheral side. Moreover, the tapered line has a regular shape, which is easier to model for the production end and helps to reduce the difficulty of production.

[0010] In some embodiments of this application, the outer peripheral surface includes a first outer surface located on both sides of the brush head along the width direction of the brush head, and a second outer surface located on both sides of the first outer surface along the length direction of the brush head. The dimension of the middle portion of the first outer surface along the thickness direction of the brush head is greater than the dimension of the second outer surface along the thickness direction of the brush head; wherein, the first outer surface is a convex smooth curved surface. During oral cleaning, the middle portion of the first outer surface is more likely to come into contact with the oral cavity area than the second outer surface, making the probability of the middle portion of the first outer surface contacting the oral cavity area greater. In this embodiment, by designing the first outer surface to have a larger thickness in the middle and the second outer surface to have a smaller thickness, the middle portion of the first outer surface forms a larger area. A larger area makes it easier to form a larger rounded arc surface. When a larger rounded arc surface comes into contact with the oral cavity area, the pressure generated on the oral cavity area is smaller. At the same time, since the probability of the middle portion of the first outer surface contacting the oral cavity area is greater, the probability of the first outer surface generating a large pressure on the oral cavity area when it comes into contact with the oral cavity area can be reduced, thereby further reducing the discomfort caused to the user by the first outer surface.

[0011] In some embodiments of this application, on a plane perpendicular to the width direction of the brush head, the outline of the orthographic projection of the back side includes a first oblique line. The first oblique line is disposed near the front end of the brush head and extends obliquely towards the front end and the bristle-embedded surface. The first oblique line creates a slope extending downwards towards the front end of the brush head, making it easier for the front end of the brush head to insert between the outer surface of the molar and the inner wall of the mouth. This facilitates brushing the outer surface of the molar in children and reduces the contact tightness between the front end of the slope and the inner wall of the mouth. It can even maintain a certain distance between the front end of the slope and the inner wall of the mouth, thereby reducing the pressure exerted by the slope on the inner wall of the mouth and reducing discomfort in the oral region when the back side contacts the oral cavity.

[0012] In some embodiments of this application, the maximum dimension of the brush head body along the width direction of the brush head is d1, and the maximum dimension of the brush head body along the thickness direction of the brush head is d2, where d1 ≤ 1.6d2; and / or, the maximum dimension of the brush head body along the length direction of the brush head is L, and the maximum dimension of the brush head body along the width direction of the brush head is d1, where L ≤ 1.4d1. The ratio of d1 to d2 is the width-to-thickness ratio of the brush head body. When d1 ≤ 1.6d2, the overall shape of the brush head body is close to elliptical, making the shape of the brush head body more rounded, thereby avoiding sharp protruding areas and making it easier to design a rounded shape from a design perspective. In addition, the area at both ends of the brush head body along the width direction can be made larger, which can prevent the volume of the area at both ends of the brush head body along the width direction from being too small and causing greater pressure on the oral cavity. Furthermore, the relatively small size of the brush head body in the width direction can reduce the risk of the brush head body being too wide and hitting the oral cavity. When L≤1.4d1, the overall shape of the brush head body is close to a short cylindrical rod, making the shape of the brush head body more rounded, which can reduce the discomfort caused to the user when the tip of the brush head body is inserted into the oral cavity.

[0013] In some embodiments of this application, at least a portion of the area where the outer peripheral side meets the bristle-embedded surface is a convex, rounded chamfered surface. The rounded chamfered surface is a smooth, regular curved surface, which reduces damage and friction to the oral cavity when the connection between the outer peripheral side and the bristle-embedded surface comes into contact with or rubs against the oral cavity. This further reduces oral damage caused by the brush head during oral cleaning at transition points between different sides and reduces the feeling of a foreign object when the brush head enters the mouth, thereby further reducing discomfort to the user and making the brush head more suitable for children.

[0014] In some embodiments of this application, the bristle-implanting surface is a concave surface recessed towards the dorsal side, and the bristle structure is disposed on the concave surface. In the prior art, the bristle-implanting surface of the brush head is typically planar, with each part of the planar bristle-implanting surface being relatively convex, making it easier for the convex bristle-implanting surface to contact the oral cavity. However, in this embodiment, by making the bristle-implanting surface concave, from an overall perspective, the concave area can accommodate the bristle-implanting surface, making the distance between the portion of the bristle-implanting surface farther from the outer peripheral side and the first connection point in the thickness direction of the brush head larger. This makes it less likely for the portion of the bristle-implanting surface farther from the outer peripheral side to contact the oral cavity during oral cleaning, thereby reducing the probability of contact between the bristle-implanting surface and the oral cavity, further reducing damage to the oral cavity. Moreover, compared to a planar surface, a concave surface has a larger area, allowing for the placement of more bristles and helping to increase the bristle density of the brush head.

[0015] In some embodiments of this application, the brush head body includes: a bristle-planting plate, including a bristle-planting portion located corresponding to the bristle-planting surface, and the bristle structure disposed on the bristle-planting portion; and a soft protective member, the hardness of which is less than that of the bristle-planting plate, the surface of which forms the back side and the outer peripheral side. Compared to the bristle-planting plate, the soft protective member is softer and can provide cushioning protection on the bristle-planting surface and the outer peripheral side. The soft protective member reduces the impact and discomfort when in contact with the oral cavity, thereby reducing oral damage caused by the brush head and the foreign body sensation when the brush head enters the mouth during oral cleaning, making it safer for children to use.

[0016] Secondly, this application also provides a toothbrush, including a handle and a brush head as described in any of the above embodiments, wherein the handle is connected to the brush head body.

[0017] The beneficial effects of this application are as follows: In existing brush heads, the brush head body is usually cuboid or some complex polygonal shape, which results in sharp edges at the joints of the various outer surfaces of the brush head body. At the same time, in order for the bristles on the brush head to be firmly installed on the brush head body, the brush head body usually needs to have sufficient thickness for the bristles to insert. The thickness of the cuboid-shaped brush head body is usually relatively uniform, resulting in a large volume of the cuboid-shaped brush head body. Since children's oral cavity volume is usually small, the outer surface of the brush head body usually comes into close contact with the inner wall of the child's mouth when the child is cleaning their mouth. Furthermore, children usually brush their teeth randomly and irregularly. When brushing back and forth and changing the brushing angle, the sharp edges are prone to collision and scraping with the tooth surface and the inner wall of the mouth, which can easily cause oral damage.

[0018] Therefore, in this application, on the one hand, the outer contour line is the contour line formed by the outermost convex areas of each part of the brush head body. The outermost convex areas of each side of the outer surface of the brush head body are smoothly connected. Here, "smoothly connected" means without obvious sharp edges or other angular structures. The outermost convex areas of the outer surface are connected or composed of rounded corners or curved surfaces, so that there are no obvious abrupt changes in curvature in the outermost convex areas of the outer surface. This ensures that the outermost convex areas of the outer surface of the brush head body do not have sharp areas, protruding edges, or areas with obvious height changes that affect the overall integrity of the outer surface. Thus, by eliminating the angular structures at the connection points of the outermost convex areas of each side, damage to the oral cavity caused by the angular structures at the outermost convex areas during brushing can be avoided. Furthermore, since the outermost convex areas of each side have the highest probability of contact with the oral cavity, the smooth connection points of the outermost convex areas of each side provide less discomfort when in contact with the oral cavity walls and teeth, thereby reducing the discomfort experienced by the user during brushing. On the other hand, by setting at least one of the dorsal side and the outer peripheral side as a smoothly extended arc surface, the dorsal side and the outer peripheral side are made smoother, thereby eliminating any possible sharp edges on the dorsal side and the outer peripheral side. Furthermore, without changing the maximum thickness of the brush head body, some structures on the brush head body in the prior art can be removed, allowing the brush head body to have a smaller volume and be easier to insert into the human mouth. In addition, the discomfort to the user is also lower when the arc surface contacts the oral cavity wall, thus making the brush head of this application more suitable for children to use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the brush head from a first-view perspective in one embodiment of this application; Figure 2 This is a schematic diagram of the brush head from a second-view perspective in one embodiment of this application; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the brush head from a third-person perspective in one embodiment of this application; Figure 5 This is a schematic diagram of the brush head structure after the bristles have been removed in one embodiment of this application, viewed from a fourth perspective. Figure 6 This is a schematic diagram of the brush head structure after the bristles have been removed in one embodiment of this application, viewed from a fifth-angle perspective. Figure 7 This is a schematic diagram of the structure of the flocking board in one embodiment of this application; Figure 8 This is a schematic diagram of the toothbrush structure in one embodiment of this application.

[0021] Figure label: 10. Brush head body; 11. Bristle-forming surface; 111. Third contour line; 12. Back side; 121. Second contour line; 122. First oblique line; 13. Outer peripheral side; 131. First contour line; 131a. First endpoint; 131b. Second endpoint; 131c. Top protrusion; 132. First outer side; 133. Second outer side; 141. First connection point; 142. Curved chamfer structure; 15. Bristle-forming plate; 151. Bristle-forming part; 16. Soft protective part; 161. Back side protective part; 162. Outer peripheral protective part; 163. Bristle-forming protective part; 20. Brush bristle structure; 21. First bristle group; 22. Second bristle group; 22a. Connecting end; 22b. Free end; 22c. Free end face; 30. Brush handle; N. Center line. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] This application provides a brush head and toothbrush to solve the problem that existing brush heads are prone to collision and scraping with the tooth surface and the inner wall of the mouth, which can easily cause oral damage and discomfort.

[0024] Firstly, this application provides a brush head, such as Figure 1 , Figure 2 and Figure 3 As shown, the brush head includes a brush head body 10 and a bristle structure 20.

[0025] The brush head body 10 has a bristle-embedded surface 11, a dorsal surface 12, and a peripheral surface 13. The dorsal surface 12 is positioned opposite to the bristle-embedded surface 11, and the peripheral surface 13 is located between the bristle-embedded surface 11 and the dorsal surface 12, and is connected to both the bristle-embedded surface 11 and the dorsal surface 12. When using the brush head to clean the tooth surface, the bristle-embedded surface 11 faces the target tooth.

[0026] The bristle structure 20 is disposed on the brush head body 10. The bristle structure 20 includes multiple bristles extending outward from the bristle implantation surface 11. One end of the bristle can be inserted into the brush head body 10 and thus fixed on the brush head body 10. The bristles can be used to brush the tooth surface, interdental spaces, oral cavity walls and other oral areas to clean the oral cavity.

[0027] Specifically, such as Figure 2 and Figure 3 As shown, on plane P1 perpendicular to the length direction Z of the brush head, the outer contour of the orthographic projection of the dorsal side 12 and / or the peripheral side 13 is a smoothly extending arc, and the dorsal side 12 and the peripheral side 13 are smoothly connected, as are the peripheral side 13 and the bristle implantation surface 11. It can be understood that the outer contour of the orthographic projection of the bristle implantation surface 11 on plane P1 perpendicular to the length direction Z of the brush head is the contour of the orthographic projection of the most convex area on the bristle implantation surface 11 on plane P1 perpendicular to the length direction Z of the brush head, and the most convex area on the bristle implantation surface 11 is also the area on the bristle implantation surface 11 with the highest probability of contact with the oral cavity region. Similarly, it can be seen that the outer contour of the orthographic projection of the dorsal side 12 on plane P1 perpendicular to the length direction Z of the brush head is the contour of the orthographic projection of the most convex area on the dorsal side 12 on plane P1 perpendicular to the length direction Z of the brush head, and the most convex area on the dorsal side 12 is also the area on the dorsal side 12 with the highest probability of contact with the oral cavity region. The outer contour line of the orthographic projection of the outer peripheral side 13 onto the plane P1 perpendicular to the length direction Z of the brush head is the contour line of the orthographic projection of the most convex area on the outer peripheral side 13 onto the plane P1 perpendicular to the length direction Z of the brush head. The most convex area on the outer peripheral side 13 is also the area on the outer peripheral side 13 with the highest probability of contact with the oral cavity area.

[0028] In one example, taking the outer contour line of the orthographic projection of the outer peripheral side 13 on the plane P1 perpendicular to the length direction Z of the brush head as the first contour line 131 and the outer contour line of the orthographic projection of the back side 12 as the second contour line 121, it is possible that only the first contour line 131 is a smoothly extending arc, or only the second contour line 121 is a smoothly extending arc, or both the first contour line 131 and the second contour line 121 are smoothly extending arcs and form a whole.

[0029] Understandably, in existing brush heads, the brush head body is usually cuboid or some complex polygonal shape, resulting in sharp edges at the joints of the various outer surfaces. Additionally, to ensure the bristles are securely attached, the brush head body typically needs sufficient thickness for bristle insertion. The uniform thickness of cuboid brush heads leads to a generally large volume. Since children's mouths are typically smaller, the outer surface of the brush head often comes into close contact with the inner walls of their mouths during oral cleaning. Furthermore, children often brush their teeth haphazardly and irregularly, and the sharp edges can easily collide and scrape against the tooth surfaces and inner walls of the mouth during back-and-forth brushing and changes in brushing angle, potentially causing oral damage.

[0030] In this application, after referring to the above research conclusions, on the one hand, the outermost convex areas of each side (back side 12, outer peripheral side 13, and bristle-embedded surface 11) of the outer surface of the brush head body 10 are smoothly connected. Here, smooth connection means that there are no obvious sharp edges or other shapes. The outermost convex areas of the outer surface of the brush head body 10 are connected or composed of rounded arc corners or arc surfaces, so that the outermost convex areas of the outer surface of the brush head body 10 do not have obvious curvature abrupt changes. Thus, the outermost convex areas of the outer surface of the brush head body 10 generally form a whole surface, avoiding sharp areas, protruding edges, or areas with obvious height changes that affect the integrity of the outer surface. In this way, by eliminating the angular structures at the connection points of the outermost convex areas on each side, oral damage caused by the angular structures at the outermost convex areas during brushing can be avoided. Furthermore, since the outermost convex areas on each side are the areas with the highest probability of contact with the oral cavity, the smooth connection points of the outermost convex areas on each side give a less unusual feeling when they come into contact with the oral cavity wall and teeth, thereby reducing the discomfort caused to users when brushing their teeth.

[0031] On the other hand, by setting at least one of the second contour line 121 corresponding to the outermost convex area of ​​the back side 12 and the first contour line 131 corresponding to the outermost convex area of ​​the outer peripheral side 13 as a smoothly extending arc, at least one of the first contour line 131 and the second contour line 121 becomes smoother, thereby eliminating the possible angular structures on the outermost convex areas of the back side 12 and the outer peripheral side 13. Furthermore, without changing the maximum thickness of the brush head body 10, some structures on the brush head body 10 in the prior art (such as the angular parts on the cuboid-shaped brush head body 10) can be removed, so that the brush head body 10 can have a smaller volume and be easier to insert into the human mouth. In addition, when the arc surface contacts the oral cavity wall, the user's discomfort is also lower, thus making the brush head in this application more suitable for children to use.

[0032] In the above embodiments, Figure 2 The outline shown is the outline of the outermost convex area of ​​the brush head. Except... Figure 2 Outside the outline shown, it can be understood that in some embodiments (e.g.) Figure 6 The plane perpendicular to the length direction Z of the brush head is the longitudinal section P3. The outer contour line of the plane formed by the intersection of the brush head body 10 and any longitudinal section P3 is a smooth extending arc. That is, the outer peripheral side 13 and the back side 12 are all smooth extending arc shapes. Different areas of the outer side of the brush head body 10 are connected or composed by rounded arc corners or arc surfaces, so that there are no areas with obvious curvature changes on the outer side. Thus, the outer side generally forms a whole surface, ensuring that there are no sharp areas, protruding areas or areas with obvious height changes on the outer side of the brush head body 10 that affect the integrity of the outer side. This can further reduce the discomfort caused to the user when brushing teeth.

[0033] See also Figure 2 As shown, in some embodiments, on a plane P1 perpendicular to the length direction Z of the brush head, the outer contour line of the orthographic projection of the bristle-embedded surface 11 is a third contour line 111, and the first contour line 131 includes a top protrusion 131c. It can be understood that the top protrusion 131c is the point on the first contour line 131 that is furthest from the center of the brush head along the width direction Y of the brush head.

[0034] Wherein, the distance between any point on the second contour line 121 and the center line N of the orthographic projection along the width direction Y of the brush head is K1, the distance between any point on the third contour line 111 and the center line N along the width direction Y of the brush head is K2, the distance between the top protrusion 131c and the center line N along the width direction Y of the brush head is K3, and the distance between any point on the first contour line 131 other than the top protrusion 131c and the center line N along the width direction Y of the brush head is K4; K1 < K3, K2 < K3, K4 < K3, and the area of ​​the outer peripheral side 13 corresponding to the top protrusion 131c is a smooth convex curved surface.

[0035] It is understandable that the outermost point of the brush head in the width direction Y (top protrusion 131c) is located on the outer peripheral side 13, so that the top protrusion 131c constitutes the only protruding position of the brush head in the width direction Y, making it easy to design a large rounded arc surface structure at the only protrusion point to alleviate the discomfort caused by the protruding position to the oral cavity.

[0036] In some embodiments, the first contour line 131 further includes a first endpoint 131a and a second endpoint 131b. The first contour line 131 intersects the second contour line 121 at the first endpoint 131a, and the first contour line 131 intersects the third contour line 111 at the second endpoint 131b. A convex point 131c is located between the first endpoint 131a and the second endpoint 131b. It is understood that the first endpoint 131a is the intersection of the first contour line 131 and the second contour line 121, and the second endpoint 131b is the intersection of the first contour line 131 and the third contour line 111.

[0037] Specifically, on the first contour line 131, K4 gradually decreases from the top convex point 131c towards the first endpoint 131a; K4 gradually decreases from the top convex point 131c towards the second endpoint 131b; on the second contour line 121, K1 gradually decreases from the first endpoint 131a towards the intersection of the second contour line 121 and the center line N; and on the third contour line 111, K3 gradually decreases from the second endpoint 131b towards the intersection of the third contour line 111 and the center line N, thereby making the top convex point 131c the only protruding position of the brush head in the width direction Y.

[0038] Furthermore, it is understandable that, see Figure 2As shown, taking the first endpoint 131a as the starting point of the extension of the first contour line 131 as an example, the first contour line 131 extends from the first endpoint 131a away from the center of the brush head to the top protrusion 131c, and then extends from the top protrusion 131c towards the center of the brush head to the second endpoint 131b. The distance between the first contour line 131 and the center of the brush head along the width direction Y of the brush head first increases and then decreases, so that the size of the brush head body 10 along the width direction Y of the brush head can gradually decrease from the top protrusion 131c to the second endpoint 131b. This can completely eliminate the corner parts on both sides of the cube-shaped brush head body 10 along its width direction Y in the prior art, further reduce the volume of the brush head body 10, make the brush head easier to insert into the human mouth, further reduce the discomfort to the user, and thus make it more suitable for children to use.

[0039] Furthermore, the continuous curve on the first contour line 131, which at least partially includes the apex 131c, is a tapering line, and the curvature of the tapering line gradually increases in the direction away from the first endpoint 131a. It is understood that a tapering line is also called a bend line or a shrinking line, etc. A tapering line is formed by the trajectory line of closely spaced circles on a curve, and the curvature of the tapering line gradually decreases from the starting point to its ending point. Specifically, in this embodiment, the curvature of the first contour line 131 gradually increases in the direction away from the first endpoint 131a, causing the brush head body 10 to taper towards the center of the brush head from the back side 12 to the bristle-embedded surface 11, which can further reduce the overall volume of the brush head body 10 and further reduce user discomfort. In addition, the tapering line makes it easier to form a large arc-angle surface, making it easier for the outer peripheral side 13 to form a large arc-angle surface, thus making it easier for the outer peripheral side 13 to extend smoothly from the back side 12 to the bristle-embedded surface 11, thereby making it easier to eliminate any sharp edges or corners that may exist in the outer peripheral side 13.

[0040] In some embodiments, the maximum dimension of the brush head body 10 along the width direction Y of the brush head is d1, and the maximum dimension of the brush head body 10 along the thickness direction X of the brush head is d2, where d1 ≤ 1.6d2. It can be understood that in this application, d1 is the maximum distance along the width direction Y of the two first contour lines 131 on both sides of the brush head body 10. Specifically, d1 is the distance along the width direction Y of the two top protrusions 131c on the two first contour lines 131; d2 is the maximum distance along the thickness direction X of the brush head between the back side surface 12 and the bristle-embedded surface 11. Here, d1 can be 1.6d2, 1.5d2, 1.2d2, or other multiples of d2, and the specific values ​​of d1 and d2 can be selected according to actual needs.

[0041] It should be noted that when d1 is greater than 1.6d2, the width-to-thickness ratio (i.e., the ratio of d1 to d2) of the brush head body 10 is too large, making the overall shape of the brush head body 10 nearly flat. This results in a less rounded shape, and to maintain the overall dimensions, smaller areas tend to form at both ends of the width direction Y. These areas can exert greater pressure on the oral cavity, causing discomfort. Moreover, an excessively wide width direction Y increases the risk of the brush head body 10 hitting the oral cavity, further increasing the user's discomfort when it is inserted into the mouth.

[0042] like Figure 2 and Figure 3 As shown, in some embodiments, at least a portion of the area where the outer peripheral side 13 connects to the bristle-embedded surface 11 has an outwardly convex arc-shaped chamfered surface to form an arc-shaped chamfered structure 142. It is understood that the arc-shaped chamfered surface is smoother, resulting in less damage and friction to the oral cavity area when the connection between the outer peripheral side 13 and the bristle-embedded surface 11 comes into contact with or rubs against the oral cavity. This further reduces oral damage caused by the brush head during oral cleaning at the transition points between different sides and reduces the foreign body sensation when the brush head enters the mouth, thereby further reducing discomfort to the user and making the brush head more suitable for children.

[0043] Specifically, it can be configured that all areas at the connection between the outer peripheral side 13 and the hair-planting surface 11 have outwardly convex arc-shaped chamfered surfaces, making all areas at the connection between the outer peripheral side 13 and the hair-planting surface 11 smoother, thus avoiding the formation of angular structures in some areas at the connection between the outer peripheral side 13 and the hair-planting surface 11.

[0044] In some embodiments, the connection between the outer peripheral side 13 and the hair-planting surface 11 is a first connection 141. The outer peripheral side 13 extends obliquely away from the back side 12 to the first connection 141, and the hair-planting surface 11 extends obliquely away from the back side 12 to the first connection 141, so as to form an arc-shaped chamfer structure 142 at the first connection 141. The outer peripheral side 13 is smoothly connected to the hair-planting surface 11 through the arc-shaped chamfer structure 142, making the first connection 141 between the outer peripheral side 13 and the hair-planting surface 11 smoother and preventing the formation of an angular structure at the first connection 141.

[0045] like Figure 4 As shown, in some embodiments, the outer peripheral side 13 includes a first outer side 132 located on both sides of the brush head along the width direction Y of the brush head, and a second outer side 133 located on both sides of the first outer side 132 along the length direction Z of the brush head. The size of the middle portion of the first outer side 132 along the thickness direction X of the brush head is larger than the size of the second outer side along the thickness direction X of the brush head.

[0046] Understandably, during oral cleaning, the middle part of the first outer surface 132 is more likely to come into contact with the oral cavity than the second outer surface 133, thus increasing the probability of the middle part of the first outer surface 132 contacting the oral cavity. In this embodiment, by designing the first outer surface 132 with a large area in the middle and small areas on both sides of the second outer surface 133, the middle part of the first outer surface 132 can have a larger area. A larger area makes it easier to form a larger rounded arc surface. When a larger rounded arc surface contacts the oral cavity, the pressure exerted on the oral cavity is smaller. At the same time, since the middle part of the first outer surface 132 is more likely to contact the oral cavity, the probability of the first outer surface 132 exerting a large pressure on the oral cavity when it comes into contact with it can be reduced, thereby further reducing the discomfort caused to the user by the first outer surface 132.

[0047] Furthermore, the first outer surface 132 is a smooth, convex curved surface, which makes the extension of the first outer surface 132 from its middle part to the second outer surface 133 smoother, which can further reduce the discomfort caused to the oral cavity area when the first outer surface 132 comes into contact with the oral cavity area.

[0048] Furthermore, the dimension of the first outer surface 132 along the thickness direction X of the brush head gradually decreases from the middle of the first outer surface 132 to the second outer surface 133, making the dimension of the first outer surface 132 along the thickness direction X of the brush head gradually change. This makes the extension of the first outer surface 132 from the middle to the second outer surface 133 smoother, which can further reduce the discomfort caused to the oral cavity area when the first outer surface 132 comes into contact with the oral cavity area.

[0049] In some embodiments, reference Figure 4 On plane P2, perpendicular to the width direction Y of the brush head, the outline of the orthographic projection of the dorsal surface 12 includes a first oblique line 122. The first oblique line 122 is located near the front end of the brush head and extends obliquely towards the front end and the bristle surface 11. It can be understood that when a user uses the brush head to brush the outer surface of the molars, the bristle surface 11 faces the outer surface of the molars, and the dorsal surface 12 will contact the oral cavity wall. The area between the outer surface of the molars and the oral cavity wall is usually relatively narrow, and the closer to the wisdom tooth area, the narrower the area between the outer surface of the molars and the oral cavity wall, and the area of ​​children's molars is even narrower.

[0050] In this application, Figure 4Taking the shown perspective as an example, the setting of the first oblique line 122 makes the back surface 12 have an oblique surface that extends downward towards the front end of the brush head, so that the front end of the brush head body 10 can be more easily inserted between the outer tooth surface of the molar and the inner wall of the mouth, which is more conducive to children brushing the outer tooth surface of the molar. It can also reduce the contact tightness between the front end of the oblique surface and the inner wall of the mouth, and can even keep a certain distance between the front end of the oblique surface and the inner wall of the mouth, thereby reducing the pressure of the oblique surface on the inner wall of the mouth, and thus reducing the discomfort caused to the oral area when the back surface 12 contacts the oral area.

[0051] In some embodiments, the maximum dimension of the brush head body 10 along the length direction Z is L, where L ≤ 1.4d1. It is understood that when L is greater than 1.4d1, the aspect ratio (i.e., the ratio of L to d1) of the brush head body 10 is too large, making the overall shape of the brush head body 10 nearly elongated. This results in a less rounded shape and may cause significant discomfort to the user when the brush head body 10 is inserted into the oral cavity. L can be 1.4d1, 1.3d1, d1, or other multiples of d1, and the specific value of L can be selected according to actual needs.

[0052] like Figure 5 and Figure 6 As shown, in some embodiments, the bristle-embedded surface 11 is concave towards the back side surface 12, and the bristle structure 20 is disposed on the concave surface. It is understood that in the prior art, to ensure that the brush head body 10 can transmit sufficient force to the bristle structure 20, the portion of the brush head body 10 connecting to the bristle structure 20 is often made of a harder material. In this embodiment, by making the bristle-embedded surface 11 concave, from an overall perspective, the concave region can accommodate the bristle-embedded surface 11, and the portion of the bristle-embedded surface 11 further away from the outer peripheral side surface 13 has a greater distance from the first connection point 141 in the thickness direction X of the brush head. During oral cleaning, the portion of the bristle-embedded surface 11 made of a harder material is less likely to come into contact with the oral cavity, thereby reducing the probability of the bristle-embedded surface 11 contacting the oral cavity and further reducing damage to the oral cavity.

[0053] Furthermore, the concave surface is a concave arc surface, which allows the overall concave surface to be designed in an arc shape, making the extension of the concave surface smoother. This reduces the discomfort caused to the oral cavity area even when the concave surface comes into contact with it.

[0054] like Figure 6As shown, in some embodiments, the curves formed by the intersection of the concave surface and any longitudinal section P3 are all U-shaped, so that the brush head body 10 only bends and rises on both sides along the width direction Y of the brush head to form a concave surface, and the two ends of the brush head body 10 along the length direction Z of the brush head are not bent and raised, which can reduce the probability of the two ends of the brush head body 10 contacting the oral cavity area, thereby reducing the probability of the two ends of the brush head body 10 causing discomfort to the oral cavity area.

[0055] like Figures 5 to 7 As shown, in some embodiments, the brush head body 10 includes a bristle-planting plate 15 and a soft protective member 16; the bristle-planting plate 15 includes a bristle-planting part 151, which is located on the bristle-planting surface 11, and the bristle structure 20 is disposed on the bristle-planting part 151. The bristle-planting plate 15 can be made of plastics such as polypropylene and polystyrene, or it can be made of metal. The bristle-planting plate 15 is used to provide support for the bristle structure 20; the hardness of the soft protective member 16 is less than that of the bristle-planting plate 15, and the surface of the soft protective member 16 forms the outer peripheral side 13 and the back side 12. The soft protective member 16 can be made of soft silicone or other materials.

[0056] Understandably, the soft protective part 16 is softer than the bristle board 15. The soft protective part 16 can act as a buffer on the bristle surface 11 and the outer peripheral side 13. The soft protective part 16 has less impact and less discomfort when it comes into contact with the oral cavity area, thereby reducing oral damage caused by the brush head and the feeling of foreign objects when the brush head enters the mouth during oral cleaning, making it safer for children to use.

[0057] like Figure 6 As shown, in some embodiments, the soft protective member 16 includes a back side protective portion 161 constituting the back side surface 12 and an outer peripheral protective portion 162 constituting the outer peripheral side surface 13. On a plane P1 perpendicular to the length direction Z of the brush head, the outer contour line of the orthographic projection of the back side protective portion 161 or / and the outer peripheral protective portion 162 is a smoothly extending arc.

[0058] In this case, on a plane perpendicular to the length direction Z of the brush head, the outer contour line of the orthographic projection of the back protective part 161 may be a smoothly extending arc, or the outer contour line of the orthographic projection of the outer peripheral protective part 162 may be a smoothly extending arc, or both the outer contour lines of the orthographic projection of the back protective part 161 and the outer contour lines of the orthographic projection of the outer peripheral protective part 162 may be arcs.

[0059] Understandably, by setting at least one of the dorsal protective portion 161 and the peripheral protective portion 162 as a smoothly extending arc surface, the dorsal protective portion 161 and the peripheral protective portion 162 are made smoother, thereby eliminating any possible sharp edges on the dorsal protective portion 161 and the peripheral protective portion 162. This results in less stimulation to the oral cavity area when the dorsal protective portion 161 and the peripheral protective portion 162 come into contact with the oral cavity area, reducing discomfort for the user and making it easier for children to use.

[0060] It should also be noted that when the first contour line 131 is an arc, the outer contour line of the orthographic projection of the outer peripheral protective part 162 is also arc, making the shape of the outer peripheral protective part 162 more compatible with the shape of the outer peripheral side 13, so that the outer peripheral protective part 162 can fit more tightly with the outer peripheral side 13, thereby reducing the overall volume of the brush head; similarly, when the second contour line 121 is an arc, the outer contour line of the orthographic projection of the back protective part 161 is also arc, making the shape of the back protective part 161 more compatible with the shape of the back side 12, so that the back protective part 161 can fit more tightly with the back side 12, thereby reducing the overall volume of the brush head.

[0061] In some embodiments, the soft protective member 16 further includes a bristle-embedded protective portion 163 constituting the bristle-embedded surface 11. The two ends of the peripheral protective portion 162 are smoothly connected to the bristle-embedded protective portion 163 and the back protective portion 161, respectively. This allows the soft protective member 16 to protect the connection between the peripheral side 13, the back side 12, and the bristle-embedded surface 11. It can also eliminate the angular structure at the connection of each protective portion (back protective portion 161, peripheral protective portion 162, and bristle-embedded protective portion 163), thus preventing oral damage caused by the angular structure during brushing. Furthermore, the smooth connection reduces the discomfort caused to the user when it comes into contact with the oral cavity wall and teeth.

[0062] Secondly, this application also provides a toothbrush, such as Figure 8 As shown, the toothbrush includes a handle and a brush head as described in any of the above embodiments, with the handle connected to the brush head body 10.

[0063] Specifically, the brush handle is connected to the tufting plate 15, which extends from the end connected to the brush handle towards the brush handle. Figure 7 Taking the shown perspective as an example, the tufting plate 15 is located at the end connected to the brush handle. Figure 7 The left end of the tufting plate 15. The brush handle can be integrally formed with the tufting plate 15 or detachably connected.

[0064] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A brush head, characterized in that, The brush head includes: The brush head body has a bristle-planting surface, a back side surface, and an outer peripheral side surface. The back side surface is disposed opposite to the bristle-planting surface, and the outer peripheral side surface is located between the bristle-planting surface and the back side surface, and is connected to the bristle-planting surface and the back side surface. A bristle structure is disposed on the brush head body, the bristle structure comprising a plurality of bristles extending outward from the bristle-planting surface; Wherein, on a plane perpendicular to the length direction of the brush head, the outer contour line of the orthographic projection of the back side and / or the outer peripheral side is a smoothly extending convex curve, and the back side and the outer peripheral side are smoothly connected, and the outer peripheral side is smoothly connected to the bristle-planting surface.

2. The brush head according to claim 1, characterized in that, The surface perpendicular to the length direction of the brush head is a longitudinal section, and the outer contour line of the plane formed by the intersection of the brush head body and any of the longitudinal sections is a smoothly extending arc.

3. The brush head according to claim 1, characterized in that, On a plane perpendicular to the length direction of the brush head, the outer contour line of the orthographic projection of the outer peripheral side is the first contour line, the outer contour line of the orthographic projection of the back side is the second contour line, and the outer contour line of the orthographic projection of the bristle-forming surface is the third contour line. The first contour line includes a top protrusion. Wherein, the distance between any point on the second contour line and the center line of the orthographic projection along the width direction of the brush head is K1, the distance between any point on the third contour line and the center line along the width direction of the brush head is K2, the distance between the top protrusion and the center line along the width direction of the brush head is K3, and the distance between any point on the first contour line other than the top protrusion and the center line along the width direction of the brush head is K4; K1 < K3, K2 < K3, K4 < K3, and the area of ​​the outer peripheral side corresponding to the top protrusion is a smooth convex curved surface.

4. The brush head according to claim 3, characterized in that, The first contour line includes a first endpoint and a second endpoint. The first contour line intersects the second contour line at the first endpoint, and the first contour line intersects the third contour line at the second endpoint. The apex is located between the first endpoint and the second endpoint. Specifically, on the first contour line, K4 gradually decreases from the top convex point towards the first endpoint; K4 gradually decreases from the top convex point towards the second endpoint; on the second contour line, K1 gradually decreases from the first endpoint towards the intersection of the second contour line and the center line; and on the third contour line, K3 gradually decreases from the second endpoint towards the intersection of the third contour line and the center line.

5. The brush head according to claim 4, characterized in that, The continuous curve on the first contour line that at least partially includes the top convex point is a tapered line, and the curvature of the tapered line gradually increases in the direction away from the first endpoint.

6. The brush head according to claim 1, characterized in that, The outer peripheral side includes a first outer side located on both sides of the brush head along the width direction of the brush head, and a second outer side located on both sides of the first outer side along the length direction of the brush head, wherein the dimension of the middle part of the first outer side along the thickness direction of the brush head is greater than the dimension of the second outer side along the thickness direction of the brush head. The first outer surface is a smooth, convex curved surface.

7. The brush head according to claim 5, characterized in that, On a plane perpendicular to the width direction of the brush head, the outline of the orthographic projection of the back side includes a first oblique line, which is disposed near the front end of the brush head and extends obliquely towards the front end and the bristle-embedded surface.

8. The brush head according to claim 1, characterized in that, The maximum dimension of the brush head body along the width direction of the brush head is d1, and the maximum dimension of the brush head body along the thickness direction of the brush head is d2, where d1≤1.6d2; Or, the maximum dimension of the brush head body along the length direction of the brush head is L, and the maximum dimension of the brush head body along the width direction of the brush head is d1, where L≤1.4d1.

9. The brush head according to claim 1, characterized in that, At least a portion of the area where the outer peripheral side meets the hair-planting surface has an outwardly convex, arc-shaped chamfered surface.

10. The brush head according to claim 1, characterized in that, The bristle-forming surface is a concave surface that is recessed in the direction of the back side, and the bristle structure is disposed on the concave surface.

11. The brush head according to any one of claims 1 to 10, characterized in that, The brush head body includes: A flocking plate includes a flocking part, which is located corresponding to the flocking surface, and the bristle structure is disposed on the flocking part; A soft protective component, wherein the hardness of the soft protective component is less than the hardness of the flocked board, and the surface of the soft protective component forms the back side and the outer peripheral side.

12. A toothbrush, characterized in that, It includes a brush handle and a brush head as claimed in any one of claims 1 to 11, wherein the brush handle is connected to the brush head body.

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