Brush head and oral care device

Abstract

The application discloses a brush head, which comprises a brush rod, a brush plate assembly and bristles; the brush plate assembly is formed with opposite first and second surfaces, the first surface is the back surface of the brush plate assembly, the second surface is formed with a bristle planting area, and the brush plate assembly has opposite first and second ends along the length direction of the brush rod and is connected with the brush rod; the bristles are arranged in the bristle planting area; the brush plate assembly comprises a connecting portion, a supporting portion and a first avoiding portion along the length direction, the connecting portion is connected with the brush rod, the supporting portion is located between the connecting portion and the first avoiding portion, and the maximum thickness point of the brush plate assembly along the thickness direction is located in the supporting portion; the length of the first avoiding portion along the length direction of the brush rod is greater than half of the length from the second end of the brush plate assembly to the end of the bristle planting area close to the brush rod, and the thickness of the first avoiding portion decreases in the direction away from the brush rod. The application also discloses an oral care device with the brush head.

Description

Technical Field

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

[0002] With the development of intelligent electric products, electric oral hygiene devices (such as electric toothbrushes) are becoming increasingly popular for daily oral hygiene due to their convenience.

[0003] Taking electric toothbrushes as an example, an electric toothbrush typically consists of a main unit and a brush head. The main unit drives the brush head to clean target areas in the mouth. In related technologies, an unreasonable brush head structure design affects the oral cleaning effect. Utility Model Content

[0004] The main objective of this application is to provide a brush head and an oral care device.

[0005] Firstly, this application provides a brush head, comprising:

[0006] A brush handle, one end of which is detachably connected to the main unit of an oral care device;

[0007] A brush plate assembly having opposing first and second surfaces, the first surface being the back surface of the brush plate assembly, the second surface having a bristle-planting area, and the brush plate assembly having opposing first and second ends along the length direction of the brush rod, the first end of the brush plate assembly being connected to the other end of the brush rod, the length direction being the same as the length direction of the brush rod;

[0008] Brush bristles, the brush bristles being disposed in the bristle-planting area;

[0009] The brush plate assembly includes a connecting portion, a supporting portion, and a first clearance portion along its length. The connecting portion is connected to the brush rod, and the supporting portion is located between the connecting portion and the first clearance portion. The maximum thickness of the brush plate assembly along its thickness direction is located at the supporting portion. The length of the first clearance portion along the length direction of the brush rod is greater than half the length from the second end of the brush plate assembly to the end of the bristle-planting area near the brush rod, and the thickness of the first clearance portion decreases towards the side away from the brush rod.

[0010] In the above embodiments, the brush plate assembly includes a connecting part, a supporting part, and a first clearance part along its length. The connecting part is connected to the brush rod, and the supporting part is located between the connecting part and the first clearance part. The maximum thickness point of the brush plate assembly along its thickness direction is located at the supporting part. The length of the first clearance part along the length direction of the brush rod is greater than half the length from the second end of the brush plate assembly to the end of the bristle-implanting area near the brush rod. The thickness of the first clearance part decreases towards the side away from the brush rod. That is, the supporting part where the maximum thickness point is located is located at the end of the brush head near the brush rod. Therefore, when using the brush head for oral cleaning (such as cleaning wisdom teeth or teeth adjacent to wisdom teeth), at least a portion of the supporting part and the connecting part of the brush head are in contact with the oral cavity, while the first clearance part has less or no contact with the oral cavity. This allows the brush head to enter the oral cavity more smoothly through the first clearance part, and effectively reduces the contact area between the back of the brush head and the oral cavity after the brush head enters the oral cavity. Ultimately, this can effectively reduce the attenuation of the motor driving force and improve the oral cleaning effect.

[0011] In some embodiments, the distance between the projection point of the point of maximum thickness in the hair-planting area and the second end of the brush plate assembly is greater than half the length from the second end of the brush plate assembly to the end of the hair-planting area near the brush handle.

[0012] In some embodiments, the support portion varies less than 0.5 mm in the thickness direction of the brush assembly.

[0013] In some embodiments, the outer surface of the first avoidance portion on the side away from the hair-planting area includes at least a partial arcuate surface, and the arcuate surface has one and only one arcuate bend in the length direction and the thickness direction, wherein the thickness direction is perpendicular to the length direction.

[0014] In some embodiments, the first surface has a thickness abrupt change point; wherein, the thickness abrupt change point is located on the outer surface of the first clearance portion away from the hair-planting area, or, the thickness abrupt change point is located on the outer surface of the connecting portion away from the hair-planting area.

[0015] In some embodiments, the distance between the first surface and the second surface at the endpoint of the second end of the brush assembly is less than 4 mm;

[0016] And / or, the distance between the projection point of the point of maximum thickness in the hair-planting area and the second end of the brush plate assembly is greater than 12mm;

[0017] And / or, the maximum thickness between the first surface and the second surface is greater than 4 mm and less than 8 mm.

[0018] In some embodiments, the thickness of the brush assembly along the thickness direction increases and then decreases from the second end of the brush assembly to the first end of the brush assembly.

[0019] In some embodiments, the line connecting the first surface from the second end of the brush assembly to the point of maximum thickness has a first slope;

[0020] The line connecting the first surface from the point of maximum thickness to the end of the brush assembly near the brush bar has a second slope, and the absolute value of the first slope is greater than the absolute value of the second slope.

[0021] In some embodiments, the back of the brush assembly has an arcuate protrusion in the thickness increase interval from the second end of the brush assembly to the point of maximum thickness.

[0022] In some embodiments, the brush assembly further includes a second clearance portion disposed on opposite sides of the support portion along the width direction.

[0023] In some embodiments, the second clearance portion is recessed toward the side closer to the second surface.

[0024] In some embodiments, at the point of maximum thickness, the first surface has a second width W2 in the width direction of the brush assembly, the bristle-planting area has a first width W1, and W2 < 1 / 2 * W1.

[0025] In some embodiments, the brush assembly includes a brush plate component and a soft rubber component, the soft rubber component covering at least a portion of the back and peripheral sides of the brush plate component;

[0026] The first surface is the back side of the soft rubber part, and the second surface is the side surface of the brush plate component away from the back side of the soft rubber part.

[0027] In some embodiments, the back surface of the brush plate component is arc-shaped, and the thickness between the back surface of the brush plate component and the second surface in the thickness direction increases and then decreases from the second end of the brush plate assembly to the first end of the brush plate assembly.

[0028] Furthermore, the thickness of the back side of the soft rubber part and the second surface in the thickness direction increases and then decreases from the second end of the brush assembly to the first end of the brush assembly.

[0029] The point of maximum thickness between the back surface of the brush plate component and the second surface in the thickness direction is located between the point of maximum thickness between the back surface of the soft rubber component and the second surface in the thickness direction and the first end of the brush plate assembly.

[0030] In some embodiments, the back of the soft rubber component corresponding to the thickness increase interval from the second end of the brush assembly to the maximum thickness point has a first average thickness, and the back of the soft rubber component corresponding to the thickness decrease interval from the maximum thickness point to the first end of the brush assembly has a second average thickness, wherein the first average thickness is greater than the second average thickness.

[0031] In some embodiments, the brush plate component includes a back plate and a bristle plate, the back plate includes a support and a connector, the support is connected to the brush bar, and the back of the support is arc-shaped;

[0032] The connector connects the support and the tufting plate, and there is a gap between the connector and the support. The soft rubber part covers a portion of the back of the support and the peripheral side of the tufting plate, and fills at least part of the gap. The surface of the tufting plate away from the support is the second surface of the brush plate assembly.

[0033] Wherein, when the bristles are subjected to an external force, at least a portion of the connector may deform and swing relative to the support on opposite sides of the length direction, and / or swing in a direction perpendicular to the second surface.

[0034] In some embodiments, the projection of the connector along its length onto the bristle-forming area is located on the side of the support member near the second end of the brush assembly;

[0035] The soft rubber part has a first average thickness on its back side corresponding to the thickness increase interval between the second end of the brush plate assembly and the maximum thickness point, and a second average thickness on its back side corresponding to the thickness decrease interval between the maximum thickness point and the first end of the brush plate assembly, wherein the first average thickness is greater than the second average thickness.

[0036] Secondly, this application also provides an oral care device, including a main unit and the aforementioned brush head, wherein the brush head is detachably connected to the main unit.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a three-dimensional structural diagram of the oral cleaning device provided in the embodiments of this application;

[0040] Figure 2 A three-dimensional structural diagram of the main unit of the oral cleaning device provided in the embodiments of this application;

[0041] Figure 3 A three-dimensional structural diagram of the brush head from a first-view perspective, provided in an embodiment of this application;

[0042] Figure 4 A second-view perspective three-dimensional structural diagram of the brush head provided in an embodiment of this application;

[0043] Figure 5 This is a partially enlarged structural diagram of the brush head provided in an embodiment of this application.

[0044] Figure 6 This is a partial three-dimensional structural diagram of a brush head without bristles provided in an embodiment of this application;

[0045] Figure 7 A third-dimensional structural diagram of the brush head provided in an embodiment of this application, viewed from a fourth perspective;

[0046] Figure 8 This is a schematic diagram of a modified structure of the brush head provided in an embodiment of this application;

[0047] Figure 9 This is an exploded view of the brush head provided in an embodiment of this application.

[0048] Figure 10 This is a second-view exploded structural diagram of the brush head provided in an embodiment of this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0052] Please see Figure 1 and Figure 2 , Figure 1 This is a three-dimensional structural diagram of an oral care device provided in an embodiment of this application.

[0053] like Figure 1 and Figure 2 As shown, the oral care device 100 includes a main unit 20 and a brush head 10. The main unit 20 includes a drive component 21 and a control component 22 connected to the drive component 21. The drive component 21 is detachably connected to the brush head 10 and is used to drive the brush head 10 to move. The user can trigger the control component 22 by pressing, sliding, pushing, pulling, etc., so as to control the drive component 21 to perform corresponding actions. It can be understood that the oral care device 100 includes, but is not limited to, an electric toothbrush.

[0054] Optionally, the drive assembly 21 and the brush head 10 can be detachably connected in ways including but not limited to structural engagement and threaded connection. Typically, after a period of use, the cleaning effectiveness of the brush head 10 of the oral care device 100 will decrease or it will become contaminated. This may lead to a decline in oral hygiene or even affect human health, thus requiring periodic replacement. Therefore, the detachable connection between the drive assembly 21 and the brush head 10 allows the oral care device 1000 to replace only the brush head 10 when replacement is needed, avoiding unnecessary waste.

[0055] For example, the control component 22 is connected to the electric motor of the drive component 21 via a connecting wire to supply power to the drive component 21, thereby driving the drive component 21 to move and thus driving the brush head 10 to operate. The drive component 21 includes an electric motor, and the brush head 10 can be detachably connected to the output shaft of the electric motor. The brush head 10 can vibrate under the drive of the electric motor to clean the inside of the oral cavity.

[0056] Optionally, the electric motor can be set with different vibration modes of different degrees or directions, such as fast vibration, medium speed vibration, bidirectional vibration and interval vibration, which can drive the brush head 10 to have different vibration modes, and users can choose according to their own usage habits.

[0057] Optionally, the control component 22 includes a trigger switch, a circuit board, and a power supply module, the power supply module including but not limited to a battery. The user performs a corresponding trigger operation on the trigger switch, causing the trigger switch to output a corresponding trigger signal to the circuit board. The circuit board then controls the drive component 21 and the power supply module of the host 20 to perform corresponding operations based on the received trigger signal, such as powering on, powering off, and selecting vibration mode.

[0058] Please see Figures 3 to 6 In some embodiments, the brush head 10 includes a brush handle 11, a brush plate assembly 12, and brush bristles 13.

[0059] One end of the brush handle 11 is detachably connected to the main unit 20 of the oral care device 100.

[0060] The brush plate assembly 12 has a first end 12c and a second end 12d opposite each other in the length direction. The first end 12c of the brush plate assembly 12 is connected to the other end of the brush rod 11, and the length direction is the same as the length direction of the brush rod 11.

[0061] Furthermore, the brush plate assembly 12 has a first surface 12a and a second surface 12b opposite to each other. The first surface 12a is the back side of the brush plate assembly 12, and the second surface 12b has a bristle planting area 120, where bristles 13 are disposed.

[0062] The brush assembly 12 includes a connecting portion 121, a supporting portion 122, and a first clearance portion 123 along its length. The connecting portion 121 is connected to the brush rod 11, and the supporting portion 122 is located between the connecting portion 121 and the first clearance portion 123. The maximum thickness of the brush assembly 10 along its thickness direction is located at the supporting portion 122. The length of the first clearance portion 123 along the length direction of the brush rod 11 is greater than half the length from the second end 12d of the brush assembly 12 to the end of the bristle-planting area 120 near the brush rod 11, and the thickness of the first clearance portion 123 decreases towards the side away from the brush rod 11.

[0063] like Figure 3 , Figure 5 and Figure 6 As shown, the maximum thickness of the brush plate assembly 10 along the thickness direction is point A, which is located in the support part 122. The length of the first clearance part 123 along the length direction of the brush rod 11 is L1. The length from the second end 12d of the brush plate assembly 12 to the end of the bristle planting area 120 near the brush rod 11 is L. L1 > 1 / 2 * L, and the thickness H of the first clearance part 123 decreases in the direction away from the brush rod 11.

[0064] Due to the different structures of the brush heads 10, the bristle-planting areas of the brush heads 10 are also different. It is understandable that when the brush head 10 includes a back plate 124a and a bristle-planting plate 124b, and the bristle-planting plate 124b protrudes beyond the back plate 124a, such as... Figure 10 As shown, the bristle-planting area 120 of the brush head 10 is the middle area between the two ends of the bristle-planting plate 124b along the length direction of the brush handle 11. When the brush head 10 includes a back plate 124a and a bristle-planting plate 124b, and the bristle-planting plate 124b and the back plate 124a are separately arranged, the bristle-planting area 120 of the brush head 10 is the middle area between the two ends of the bristle-planting plate 124b along the length direction of the brush handle 11. When the brush head 10 only includes the bristle-planting plate 124b, the bristle-planting area 120 of the brush head 10 is the middle area between the furthest bristle-planting holes at both ends of the bristle-planting plate 124b along the length direction of the brush handle 11.

[0065] That is, in this embodiment, the back of the brush plate assembly 12 is arc-shaped, which makes it easier for the brush head 10 to enter the oral cavity during use. The support part 122, where the thickness point A is the largest, is located at the end of the brush head 10 near the brush handle 11. Therefore, when using the brush head 10 to clean the oral cavity (such as cleaning wisdom teeth or teeth adjacent to wisdom teeth), at least a portion of the support part 122 and the connecting part 121 of the brush head 10 are in contact with the oral cavity, while the first avoidance part 123 has less or no contact with the oral cavity. This allows the brush head 10 to enter the oral cavity more smoothly through the first avoidance part 123, and also effectively reduces the contact area between the back of the brush head 10 and the oral cavity after the brush head 10 enters the oral cavity. Ultimately, this can effectively reduce the attenuation of the motor driving force and improve the oral cleaning effect.

[0066] In some embodiments, the distance L2 between the projection point C of the bristle-planting area 120 at the point of maximum thickness A and the second end 12d of the brush plate assembly 12 is greater than half the length L from the second end 12d of the brush plate assembly 12 to the end of the bristle-planting area near the brush handle 11, i.e., L2 > 1 / 2 * L. In other words, the point of maximum thickness of the brush head 10 is set on the side near the brush handle 11, which can effectively reduce the contact area between the back of the brush head 10 and the oral cavity, and ultimately effectively reduce the attenuation of the motor driving force and improve the oral cleaning effect.

[0067] In some embodiments, the variation of the support portion 122 in the thickness direction of the brush plate assembly 12 is less than 0.5 mm, that is, the height variation between the highest point and the lowest point of the support portion 122 is less than 0.5 mm, which means that the height variation of the support portion 122 is relatively gentle and is less likely to cause oral discomfort during contact with the oral cavity.

[0068] like Figures 3 to 5 As shown, in some embodiments, the outer surface of the first clearance portion 122 on the side away from the bristle area 120 includes at least a partial arcuate surface, and the arcuate surface has one and only one arcuate bend in both the length and thickness directions. The thickness direction is perpendicular to the length direction. That is, the outer surface of the first clearance portion 122 is arcuately smooth to improve the comfort of the brush head 10 in the mouth.

[0069] like Figure 5 As shown, in some embodiments, the distance D1 between the first surface 12a at the end point of the second end 12d of the brush assembly 12 and the second surface 12b is less than 4 mm. This arrangement makes the front end of the first clearance portion 122 thinner, facilitating the entry of the brush head 10 into the oral cavity. For example, D1 can be 3 mm, 3.5 mm, 2 mm, etc., and is not limited here.

[0070] like Figure 5 As shown, in some embodiments, the distance between the projection point of the point with the maximum thickness A in the hair-planting area 120 and the second end of the brush plate assembly 12 is greater than 12mm, that is, L3 > 12mm, such as L3 being 12.5mm, 13mm, 14mm, etc., which is not limited here.

[0071] By setting the distance between the projection point of the maximum thickness point A in the bristle area 120 and the second end of the brush plate assembly 12 within a reasonable range, the contact area between the back of the brush head 10 and the oral cavity is effectively reduced during oral cleaning. On the one hand, this reduces the power attenuation of the brush head 10 when it contacts the oral cavity, thus improving the cleaning power of the brush head. On the other hand, it reduces friction on the user's oral cavity, avoiding discomfort when brushing teeth.

[0072] like Figure 5 As shown, in some embodiments, the maximum thickness of the first surface 12a and the second surface 12b in the thickness direction is greater than 4 mm and less than 8 mm. That is, at point A, the thickness D2 between the first surface 12a and the second surface 12b of the brush assembly 12 is greater than 4 mm and less than 8 mm. For example, D2 can be 4.5 mm, 5 mm, 5.3 mm, 6 mm, etc., and is not limited here.

[0073] By setting the maximum thickness of the first surface 12a and the second surface 12b within a reasonable range in the thickness direction, the contact area between the back of the brush head 10 and the oral cavity is effectively reduced during oral cleaning. This effectively reduces the attenuation of the motor drive force and improves the oral cleaning effect. Simultaneously, reducing the contact area with the oral cavity reduces wear and tear on the oral cavity caused by brush head vibration.

[0074] like Figures 3 to 5 As shown, in some embodiments, the thickness of the brush assembly 12 along the thickness direction first increases and then decreases from the second end 12d of the brush assembly 12 to the first end 12c of the brush member. That is, the distance from the first surface 12a to the second surface 12b along the thickness direction first increases and then decreases from the second end 12d of the brush assembly 12 to the first end 12c of the brush member.

[0075] For example, the first surface 12a and the second surface 12b have a thickness variation in the length direction. From the second end of the brush assembly 12 to the first end of the brush assembly 12, the distance between the first surface 12a and the second surface 12b first increases and then decreases. The point where the thickness of the first surface 12a and the second surface 12b is the maximum in the thickness direction is point A. The distance between the projection point of point A in the bristle-planting area 120 and the second end of the brush assembly 12 is greater than half the length from the second end 12d of the brush assembly 122 to the end of the bristle-planting area 120 near the brush bar 11.

[0076] That is, within the interval from the second end of the brush assembly 12 to the point of maximum thickness A, the thickness of the first surface 12a and the second surface 12b gradually increases in the thickness direction. Therefore, the interval from the second end of the brush assembly 12 to the point of maximum thickness A is the interval of gradually increasing thickness.

[0077] Within the interval from the point of maximum thickness A to the first end of the brush assembly 12, the thickness of the first surface 12a and the second surface 12b gradually decreases in the thickness direction. Therefore, the interval from the point of maximum thickness A to the first end of the brush assembly 12, the interval where the thickness gradually decreases, is the thickness decreasing interval.

[0078] That is, the point of maximum thickness of the first surface 12a and the second surface 12b of the brush assembly 12 in the thickness direction is located near the brush rod 11.

[0079] In this embodiment, the back of the brush plate assembly 12 is arc-shaped, which makes it easier for the brush head 10 to be inserted into the oral cavity during use.

[0080] Furthermore, the curvature of the back of the brush plate assembly 12 is designed to first rise and then fall. That is, the thickness of the two opposing first surfaces 12a and second surfaces 12b of the brush plate assembly 12 in the extension direction of the brush bar 11 first increases and then decreases from the top of the brush head 10 to the end of the brush plate assembly 12 connected to the brush bar. The projection point of the maximum thickness is located on the side of the bristle area 120 close to the brush bar 11. Thus, when using the brush head 10 for oral cleaning (such as cleaning wisdom teeth or adjacent teeth in the mouth), the end of the highest point of the back of the brush head 10 that is close to the brush bar 11 contacts the mouth, while the end of the highest point of the back of the brush head 10 that is far from the brush bar 11 has less or no contact with the mouth. This can effectively reduce the contact area between the back of the brush head 10 and the mouth, and ultimately effectively reduce the attenuation of the motor driving force and improve the oral cleaning effect.

[0081] In some embodiments, the line connecting the first surface 12a from the second end 12d of the brush assembly 12 to the point of maximum thickness has a first slope. The line connecting the first surface 12a from the point of maximum thickness to the end of the brush assembly 12 near the brush bar has a second slope, and the absolute value of the first slope is greater than the absolute value of the second slope.

[0082] Optionally, in the range of increased thickness, the back of the brush assembly 12 has an arc-shaped protrusion.

[0083] like Figure 5 As shown, the line connecting the first surface 12a of the brush assembly 12 from the second end 12d of the brush assembly 12 to the point of maximum thickness has a first slope K1. The line connecting the first surface 12a of the brush assembly 12 from the point of maximum thickness to the end of the brush assembly 12 near the brush bar has a second slope K2, and the absolute value of K1 is greater than the absolute value of K2.

[0084] That is, the back of the brush plate assembly 12 is designed with a structure that rises first and then falls, and the slope K1 of the arc corresponding to the increase in thickness is greater than the slope K2 of the arc corresponding to the decrease in thickness. Therefore, when using the brush head 10 to clean the mouth (such as cleaning wisdom teeth or teeth adjacent to wisdom teeth), because the slope of the first half of the increased thickness area is larger, the end of the back of the brush head 10 that is far away from the brush handle 11 has less or no contact with the mouth. This effectively reduces the contact area between the back of the brush head 10 and the mouth. On the one hand, it can reduce the power attenuation of the brush head 10 when it contacts the mouth and improve the cleaning power of the brush head. On the other hand, it can reduce friction on the user's mouth and avoid discomfort when brushing teeth.

[0085] Furthermore, since the back of the brush plate assembly 12 has an arc-shaped protrusion in the thickness range, it avoids excessive changes in the height of the brush head 10, which could cause obvious height abrupt changes and irritate the user's mouth.

[0086] like Figure 5 and Figure 7 As shown, in some embodiments, the first surface 12a has a first slope K1 when a line is drawn from the second end 12d of the brush assembly 12 to the point of maximum thickness.

[0087] The first surface 12a has a third slope K3 in the width direction from the point of maximum thickness to the end of either of the two opposite sides, and the absolute value of the third slope K3 is greater than the absolute value of the first slope K1. That is, the thickness change rate of the back side of the brush assembly 12 in the width direction is greater than the thickness change rate of the front end in the length direction.

[0088] During the oscillation of the brush head 10, the highest point of the back of the brush head 10 is likely to come into contact with the oral cavity. The front end of the brush head 10 does not move with the oscillation of the brush head 10, but only rotates around the output shaft of the motor. Therefore, the oscillation of the brush head 10 makes it less likely that the front end of the brush head 10 will come into contact with the oral cavity. However, the two sides of the brush head 10 along the width direction will have a large displacement with the oscillation of the brush head 10, which places greater demands on avoiding the user's oral cavity wall. Therefore, through the above design, the brush head 10 can effectively avoid the user's oral cavity in the width direction, thereby reducing the contact between the brush head 10 and the oral cavity.

[0089] It is understood that the brush plate assembly 12 in the above embodiments can be a rigid brush plate component or a brush plate component with a partially rigid structure and a partially soft structure, and no limitation is made here.

[0090] like Figure 7 As shown, in some embodiments, the first surface 12a is recessed on opposite sides in the width direction toward the side closer to the second surface 12b.

[0091] Optionally, the first surface 12a is concave in the width direction on opposite sides toward the second surface 12b.

[0092] Optionally, the first surface 12a has a second width W2 in the vertical length direction, the hair-planting area 120 has a first width W1, and W2 < 1 / 2 * W1.

[0093] like Figure 7 As shown, the back of the brush plate assembly 12 is recessed on both sides of the bristle area 120 in the width direction, which can reduce the protruding area of ​​the back of the brush plate assembly 12 and thus effectively reduce the contact area between the back of the brush head 10 and the user's mouth.

[0094] Furthermore, the brush assembly 12 is recessed downwards, which, compared to a protruding design, better prevents the back of the brush assembly 12 from contacting the user's mouth.

[0095] Furthermore, the width of the back of the brush plate assembly 12 is less than half the width of the bristle implantation area 120, which can reduce the protruding area of ​​the back of the brush plate assembly 12 and effectively reduce the contact area between the back of the brush plate assembly 12 and the oral cavity.

[0096] Please see Figure 8 In some embodiments, the first surface 12a has a thickness abrupt change point. This thickness abrupt change point is located on the outer surface of the first clearance portion 123 on the side away from the hair-planting area 120, or it is located on the outer surface of the connecting portion 121 on the side away from the hair-planting area 120. For example... Figure 8As shown, the outer surface of the first clearance portion 123 away from the bristle implantation area 120 has a thickness abrupt change point X. By setting the thickness abrupt change point X, the contact area between the first surface 12a and the oral cavity can be reduced, thereby reducing the power damage to the brush head.

[0097] Please see Figures 9 to 10 In some embodiments, the brush assembly 12 includes a brush member 124 and a soft plastic member 125, the soft plastic member 125 covering at least a portion of the back side and peripheral side of the brush member 124. A first surface 12a is the back side of the soft plastic member 125, and a second surface 12b is the side surface of the brush member 124 away from the back side of the soft plastic member 125.

[0098] In this embodiment, a soft rubber part 125 is provided on the brush plate assembly 12, and the soft rubber part 125 is used to cover part of the back and peripheral side of the brush plate component 124, thereby effectively reducing the discomfort caused by the hard contact between the brush head 10 and the oral cavity, and providing a good shock absorption effect for the brush head 10.

[0099] like Figure 9 As shown, in some embodiments, the back surface of the brush plate component 124 is arc-shaped, and the thickness of the back surface of the brush plate component 124 and the second surface 12b in the longitudinal direction increases and then decreases from the second end of the brush plate assembly 12 to the first end of the brush plate assembly 12. Similarly, the thickness of the back surface of the soft rubber component 125 and the second surface 12b in the longitudinal direction also increases and then decreases from the second end of the brush plate assembly 12 to the first end of the brush plate assembly 12. The point B where the thickness of the back surface of the brush plate component 124 and the second surface 12b in the longitudinal direction is the maximum point A between the thickness of the back surface of the soft rubber component 125 and the second surface 12b in the longitudinal direction and the first end of the brush plate assembly 12.

[0100] That is, the point B of maximum thickness in the length direction between the back of the brush plate component 124 and the second surface 12b is closer to the brush handle 11 than the point A of maximum thickness in the length direction between the back of the soft rubber component 125 and the second surface 12b, so that the brush plate component 124 can provide good support for the position of the soft rubber component 125 in the mouth.

[0101] Optionally, the back of the soft rubber part 125 corresponding to the thickness increase range from the second end of the brush plate assembly 12 to the point of maximum thickness has a first average thickness, and the back of the soft rubber part 125 corresponding to the thickness decrease range from the point of maximum thickness to the first end of the brush plate assembly 12 has a second average thickness, with the first average thickness being greater than the second average thickness. That is, the average thickness of the back of the soft rubber part 125 at the end away from the brush handle 11 is greater than the average thickness of the back of the soft rubber part 125 at the end closer to the brush handle 11. Since the front end of the brush head 10, farther from the brush handle 11, is more likely to touch the teeth than the rear end, increasing the thickness of the soft rubber part at the front end can effectively alleviate the discomfort caused by teeth hitting.

[0102] like Figure 10 As shown, in some embodiments, the brush plate component 124 includes a back plate 124a and a bristle-planting plate 124b. The back plate 124a includes a support member 1241 and a connector 1242. The support member 1241 is connected to the brush rod 11, and the back of the support member 1241 is arc-shaped. The bristle-planting area 120 is formed on the side of the bristle-planting plate 124b away from the back plate 124a.

[0103] Connector 1242 connects support member 1241 and flocking plate 124b, and a gap 126 exists between connector 1242 and support member 1241. Soft rubber part 125 covers a portion of the back of support member 1241 and the peripheral side of flocking plate 124b, and fills at least part of the gap 126. The surface of flocking plate 124b away from support member 1241 is the second surface 12b of back plate 124a component 12. When the bristles 13 are subjected to external force, at least part of connector 1242 can deform and swing relative to support member 1241 on opposite sides in the longitudinal direction, and / or swing in a direction perpendicular to the second surface 12b.

[0104] In this embodiment, when the bristles 13 are subjected to force, the connector 1242 can swing, thereby moving the bristles 13. Ultimately, the relative position between the bristles 13 and the target to be cleaned (such as the tooth surface or gaps) can be adjusted, so that when the user cleans their teeth, the bristles 13 of the brush head 10 can adapt to various tooth surfaces. Depending on the force applied by the user when brushing, the overall position of the bristles 13 can be changed, which can effectively enhance the cleaning effect of the bristles 13 on the teeth and improve brushing efficiency.

[0105] It is understood that the back plate 124a and the flocking plate 124b can be molded separately and connected by means of ultrasound, adhesive, heat fusion, etc. Alternatively, the back plate 124a and the flocking plate 124b can be molded as a single piece; no limitation is made here.

[0106] When the back plate 124a and the tufting plate 124b are integrally formed, it can be understood that the brush plate component 124 is provided with a tufting hole area to form a tufting area 120.

[0107] In some embodiments, the projection of the connector 1242 along its length onto the bristle-planting area 120 is located on the side of the support 1241 near the second end of the brush plate assembly 12, and the soft rubber part 125 has a first average thickness on its back corresponding to the thickness increase interval between the second end of the back plate 124a component 12 and the point of maximum thickness, and a second average thickness on its back corresponding to the thickness decrease interval between the point of maximum thickness and the first end of the brush plate assembly 12, wherein the first average thickness is greater than the second average thickness.

[0108] In this embodiment, since the connector 1242 is located on the second end of the support 1241 near the brush plate assembly 12, and the connector 1242 of the brush head 10 can deform under stress, the thickness of the back of the soft rubber part 125 covering the end of the connector 1242 is set to be greater than the thickness covering the end of the non-connector 1242. This can effectively cover the skeleton of the brush head 10, thereby improving the structural strength of the brush head 10 while ensuring that the brush head 10 can be deformed.

[0109] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the technology disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A brush head, characterized in that, include: A brush handle, one end of which is detachably connected to the main unit of an oral care device; A brush plate assembly having opposing first and second surfaces, the first surface being the back surface of the brush plate assembly, the second surface having a bristle-planting area, and the brush plate assembly having opposing first and second ends along the length direction of the brush rod, the first end of the brush plate assembly being connected to the other end of the brush rod; Brush bristles, the brush bristles being disposed in the bristle-planting area; The brush plate assembly includes a connecting portion, a supporting portion, and a first clearance portion along its length. The connecting portion is connected to the brush rod, and the supporting portion is located between the connecting portion and the first clearance portion. The maximum thickness of the brush plate assembly along its thickness direction is located at the supporting portion. The length of the first clearance portion along the length direction of the brush rod is greater than half the length from the second end of the brush plate assembly to the end of the bristle-planting area near the brush rod, and the thickness of the first clearance portion decreases towards the side away from the brush rod.

2. The brush head according to claim 1, characterized in that, The distance between the projection point of the point of maximum thickness in the hair-planting area and the second end of the brush plate assembly is greater than half the length from the second end of the brush plate assembly to the end of the hair-planting area near the brush handle.

3. The brush head according to claim 1, characterized in that, The variation of the support portion in the thickness direction of the brush assembly is less than 0.5 mm.

4. The brush head according to claim 1, characterized in that, The outer surface of the first clearance portion on the side away from the hair-planting area includes at least a partial arcuate surface, and the arcuate surface has one and only one arcuate bend in the length and thickness directions.

5. The brush head according to claim 1, characterized in that, The first surface has a thickness abrupt change point; wherein, the thickness abrupt change point is located on the outer surface of the first clearance portion away from the hair-planting area, or, the thickness abrupt change point is located on the outer surface of the connecting portion away from the hair-planting area.

6. The brush head according to claim 1, characterized in that, The distance between the first surface and the second surface at the end point of the second end of the brush assembly is less than 4 mm; And / or, the distance between the projection point of the point of maximum thickness in the hair-planting area and the second end of the brush plate assembly is greater than 12mm; And / or, the maximum thickness between the first surface and the second surface is greater than 4 mm and less than 8 mm.

7. The brush head according to claim 1, characterized in that, The thickness of the brush assembly along the thickness direction increases and then decreases from the second end of the brush assembly to the first end of the brush assembly.

8. The brush head according to claim 7, characterized in that, The line connecting the first surface from the second end of the brush assembly to the point of maximum thickness has a first slope; The line connecting the first surface from the point of maximum thickness to the end of the brush assembly near the brush bar has a second slope, and the absolute value of the first slope is greater than the absolute value of the second slope.

9. The brush head according to claim 8, characterized in that, The back of the brush assembly has an arc-shaped protrusion from the second end of the brush assembly to the point of maximum thickness.

10. The brush head according to claim 1, characterized in that, The brush assembly further includes a second clearance portion, which is disposed on opposite sides of the support portion along the width direction.

11. The brush head according to claim 10, characterized in that, The second clearance portion is recessed towards the side closer to the second surface.

12. The brush head according to claim 1, characterized in that, At the point of maximum thickness, the first surface has a second width W2 in the width direction of the brush assembly, the bristle-planting area has a first width W1, and W2 < 1 / 2 * W1.

13. The brush head according to claim 1, characterized in that, The brush assembly includes a brush plate component and a soft rubber component, wherein the soft rubber component covers at least a portion of the back and peripheral sides of the brush plate component. The first surface is the back side of the soft rubber part, and the second surface is the side surface of the brush plate component away from the back side of the soft rubber part.

14. The brush head according to claim 13, characterized in that, The back of the brush plate component is arc-shaped, and the thickness between the back of the brush plate component and the second surface in the thickness direction increases and then decreases from the second end of the brush plate assembly to the first end of the brush plate assembly. Furthermore, the thickness of the back side of the soft rubber part and the second surface in the thickness direction increases and then decreases from the second end of the brush assembly to the first end of the brush assembly. The point of maximum thickness between the back surface of the brush plate component and the second surface in the thickness direction is located between the point of maximum thickness between the back surface of the soft rubber component and the second surface in the thickness direction and the first end of the brush plate assembly.

15. The brush head according to claim 14, characterized in that, The back of the soft rubber component corresponding to the thickness increase interval from the second end of the brush plate assembly to the maximum thickness point has a first average thickness, and the back of the soft rubber component corresponding to the thickness decrease interval from the maximum thickness point to the first end of the brush plate assembly has a second average thickness, wherein the first average thickness is greater than the second average thickness.

16. The brush head according to claim 13, characterized in that, The brush plate component includes a back plate and a bristle-forming plate. The back plate includes a support member and a connector. The support member is connected to the brush rod, and the back of the support member is arc-shaped. The connector connects the support and the tufting plate, and there is a gap between the connector and the support. The soft rubber part covers a portion of the back of the support and the peripheral side of the tufting plate, and fills at least part of the gap. The surface of the tufting plate away from the support is the second surface of the brush plate assembly. Wherein, when the bristles are subjected to an external force, at least a portion of the connector may deform and swing relative to the support on opposite sides in the length direction, and / or swing in the width direction of the brush assembly.

17. The brush head according to claim 16, characterized in that, The projection of the connector along its length in the bristle-forming area is located on the second end of the support near the brush plate assembly. The soft rubber part has a first average thickness on its back side corresponding to the thickness increase interval between the second end of the brush plate assembly and the maximum thickness point, and a second average thickness on its back side corresponding to the thickness decrease interval between the maximum thickness point and the first end of the brush plate assembly, wherein the first average thickness is greater than the second average thickness.

18. An oral care device, characterized in that, It includes a main unit and a brush head as described in any one of claims 1-17, wherein the brush head is detachably connected to the main unit.

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