Electric toothbrush and brush head thereof
By designing the bristles of the electric toothbrush brush head, the application of the brushing plate and the application of soft rubber parts solves the problem of fatigue caused by the unnatural posture when swiping the area, and realizes a more natural and comfortable brushing experience.
Patent Information
- Application Number
- CN202323161576.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-22
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-11-22
AI Technical Summary
When brushing teeth in the existing electric toothbrush head in the area, users need to brush their teeth in an unnatural or uncomfortable posture, resulting in the hands holding the brush handle that easily feel tired.
Design a kind of electric toothbrush brush head. The brush board is facing the form of the front side of the bristles. Combined with the use of soft rubber parts, the back of the brush panel is exposed to the user's mouth through the back of the soft rubber to cushion the impact force when hitting the teeth.
Users can brush their teeth in a more natural and comfortable posture, reduce the fatigue in the brushing process, and improve the comfort and willingness of brushing.
Smart Images
Figure CN222398897U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of oral cleaning, and in particular to an electric toothbrush and a brush head thereof. Background Art
[0002] In the related art, an electric toothbrush includes a brush handle and a movement disposed in the brush handle, and the output shaft of the movement passes through the brush handle and is connected to the brush head. The brush head generally includes a brush rod connected to the output shaft of the movement, a brush plate connected to the brush rod, and bristles implanted on the brush rod. The movement drives the brush plate and the bristles to vibrate at a high frequency through the brush rod, and the high-frequency vibrating bristles come into contact with the teeth or gums, thereby cleaning the user's oral cavity.
[0003] In the related art, there is a driving method in which the movement drives the brush head to swing left and right around the axis of the movement at high frequency to achieve high-frequency vibration. Corresponding to this driving method, the length extension direction of the brush plate is usually the axial direction of the output shaft, so that the brush plate has a larger bristle planting area in the axial direction of the output shaft, and more bristles can be set. However, this brush plate will have the following problems: since the user's teeth have multiple tooth areas, when cleaning the inner tooth area far away from the mouth, in order to make the bristle surface of the bristles more fully contact the inner tooth area, the user usually needs to brush his teeth in an unnatural or uncomfortable posture, which makes the hand holding the brush handle easily feel tired. Utility Model Content
[0004] The present application provides an electric toothbrush and a brush head thereof, which enable a user to brush his teeth in a natural posture and reduce fatigue during the brushing process.
[0005] A first aspect of an embodiment of the present application provides a brush head of an electric toothbrush, comprising:
[0006] A brush rod, the brush rod comprising a connecting section and an extending section connected to each other, the connecting section having a plug-in shaft hole for plugging and matching with the output shaft of the electric toothbrush;
[0007] A brush plate and bristles, the brush plate comprising a support plate and a soft rubber part, the support plate and / or the soft rubber part being connected to the extension section, the support plate having a fur-planted surface and a back surface of the plate which are arranged opposite to each other in the thickness direction, the fur-planted surface being provided with the bristles, the soft rubber part comprising at least a back soft rubber, the back soft rubber being coated on the back surface of the plate, and the hardness of the soft rubber part being less than the hardness of the support plate;
[0008] Among them, the brush plate has a center plane that divides the brush plate in half in the thickness direction. From the direction pointing from the connecting section to the brush plate, the vertical distance between the center plane and the central axis of the plug-in shaft hole gradually increases, and the brush plate is tilted forward toward the side where the bristles are located.
[0009] Optionally, the angle between the center dividing plane and the central axis of the plug-in shaft hole is not less than 3° and not more than 25°.
[0010] Optionally, when projected along the axial direction of the plug-in shaft hole, a contour line of the projection of the hair-implanted surface is located within an outer contour line of the projection of the connecting section.
[0011] Optionally, from the direction in which the connecting section points toward the brush plate, the vertical distance between the central axis of the extending section and the central axis of the plug-in shaft hole gradually increases, so that the extending section is inclined forward toward the side where the bristles are located relative to the connecting section.
[0012] Optionally, a rate of change of a vertical distance between a central axis of the extension section and a central axis of the plug-in shaft hole is not greater than a rate of change of a vertical distance between the median plane and the central axis of the plug-in shaft hole.
[0013] Optionally, the extension section has a back contour line away from the side where the bristles are located and a front contour line toward the side where the bristles are located, and the distance between the front contour line and the central axis of the plug-in shaft hole is greater than the distance between the back contour line and the central axis of the plug-in shaft hole.
[0014] Optionally, the support plate further has a peripheral side surface located on the hair-planting surface and the back side of the plate, and the soft rubber part further includes:
[0015] The peripheral soft glue is coated on the peripheral side of the support plate, and the peripheral soft glue is connected to the back soft glue.
[0016] Optionally, the peripheral soft rubber extends to be flush with the hair implantation surface.
[0017] Optionally, the extension section comprises:
[0018] A neck section connected to the support plate;
[0019] A middle section connecting the neck section and the connecting section;
[0020] Wherein, the soft rubber part also includes neck soft rubber, and the neck soft rubber is formed by extending from the back soft rubber to the neck section.
[0021] Optionally, the neck soft rubber is annularly wrapped around the neck segment.
[0022] Optionally, a surface of the neck soft glue facing away from the bristles has a first length, and a surface of the neck soft glue facing the bristles has a second length, and the first length is greater than the second length.
[0023] Optionally, the diameter of the circumscribed circle of the neck segment is greater than 3 mm.
[0024] Optionally, the bristles include a plurality of bristle clusters, the support plate has a plurality of bristle planting holes, and the brush head further includes:
[0025] A plurality of metal sheets fix the bristle clusters in the bristle planting holes in a one-to-one correspondence.
[0026] Optionally, one of the back surface of the board and the back soft rubber is provided with a connecting column, and the other is provided with a connecting hole, and the connecting column is passed through the connecting hole.
[0027] Optionally, the brush rod and the support plate are integrally formed, and the soft rubber part is formed on the support plate and the brush rod by an injection molding process.
[0028] A second aspect of the present application provides an electric toothbrush, comprising:
[0029] A brush head as described in any of the above items; and
[0030] A brush handle is detachably connected to the brush head.
[0031] Optionally, when projected along the axial direction of the plug-in shaft hole, the outer contour line of the projection of the free end of the bristle is located outside the outer contour line of the projection of the connecting section and inside the outer contour line of the projection of the brush handle.
[0032] The electric toothbrush and brush head provided in the embodiment of the present application are designed so that the brush plate is tilted forward toward the side where the bristles are located. In this way, when the user holds the brush handle to brush his teeth, especially when brushing in different areas, he needs to change to a tooth area farther from the mouth (such as the molar area inside the oral cavity) to brush his teeth. Under the same holding posture, compared with the brush head of the related art, the brush plate of the present embodiment is relatively closer to the teeth, and the bristles on the support plate are also relatively closer to the teeth. In other words, to achieve the same contact area and angle between the bristles and the tooth surface of the molar area, the present embodiment requires the user to adjust the movement amplitude relative to the natural brushing posture to be smaller, and the user can brush his teeth in a more natural and comfortable posture. Since the brush plate and the bristles are tilted forward, the user's wrist only needs to bend at a smaller angle to achieve the fit between the bristle surface and the tooth surface, thereby reducing the fatigue of the wrist holding the brush handle during brushing, thereby improving the comfort during brushing, improving the user's willingness to brush teeth, and helping to standardize brushing.
[0033] Furthermore, the support plate in this embodiment is tilted forward, but the user is likely to ignore this feature during the process of brushing teeth, or will not notice this feature at all. Therefore, before brushing teeth, after the user inserts the brush head into the oral cavity, in the same brushing posture, the user expects the brush head to be in the first tooth area, but because the support plate is tilted forward, the brush head is actually in the second tooth area at this time, and there is a position and angle deviation between the first tooth area and the second tooth area. Due to this position and angle deviation, the brush head is easy to hit the teeth at the beginning of brushing teeth. Since the hardness of the soft rubber part is less than the hardness of the support plate. In this way, during the user's brushing process, the back of the brush plate contacts the user's oral cavity through the back of the soft rubber rather than the back of the plate. When the back soft rubber contacts the gums and teeth to generate interaction force, it can undergo elastic deformation to buffer the impact force when hitting the teeth and protect the gums and teeth. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0035] Figure 1 This is a schematic diagram of the structure of an electric toothbrush in an embodiment of the present application;
[0036] Figure 2 A cross-sectional view of a brush head in one embodiment of the present application;
[0037] Figure 3 This is a schematic diagram of an exploded view of a brush head in one embodiment of the present application;
[0038] Figure 4 This is a schematic structural diagram of a brush head from another perspective in one embodiment of the present application;
[0039] Figure 5 for Figure 4 A schematic cross-sectional view of the middle brush head along the AA section;
[0040] Figure 6 This is a schematic structural diagram of a brush head from another perspective in an embodiment of the present application.
[0041] Explanation of the reference numerals: 100-electric toothbrush; 10-brush head; 11-brush plate; 11a-bisector surface; 111-support plate; 111a-hair planting surface; 111b-back of plate; 111c-side surface; 1111-connecting column; 112-soft rubber part; 112a-back of soft rubber; 112b-connecting hole; 1121-back soft rubber; 1122-side soft rubber; 1123-neck soft rubber; 12-brush rod; 121-connecting section; 121a-plug-in shaft hole; 122-extension section; 1221-neck section; 1222-middle section; 1223-front; 1224-rear; 13-bristles; 113-bristle tufts; 20-brush handle; 21-shell; 22-movement; 221-circuit board; 222-battery; 223-motor. DETAILED DESCRIPTION
[0042] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0043] See also Figure 1 The embodiment of the present application discloses an electric toothbrush 100, which includes a brush handle 20 and a brush head 10 detachably connected to the brush handle 20. The brush handle 20 includes a shell 21 and a movement 22 disposed in the shell 21, and the movement 22 includes components such as a circuit board 221, a battery 222, and a motor 223. The battery 222 supplies power to the circuit board 221 and the motor 223. The circuit board 221 is used to control the action of the motor 223. The output shaft of the motor 223 is transmitted out of the shell 21 to connect with the brush head 10 outside the shell 21 and drive the brush head 10 to vibrate, and then the vibrating brush head 10 cleans the user's oral cavity.
[0044] See also Figure 2-3 In some embodiments, the brush head 10 includes a brush plate 11 , a brush rod 12 and bristles 13 .
[0045] The brush rod 12 includes a connecting section 121 and an extending section 122 which are connected to each other. The connecting section 121 has a plug-in shaft hole 121a for plugging with the output shaft of the electric toothbrush 100 (that is, the output shaft of the motor 223). By plugging the plug-in shaft hole 121a with the output shaft of the motor 223, a detachable connection between the brush head 10 and the output shaft can be achieved.
[0046] The brush plate 11 includes a support plate 111 and a soft rubber part 112. At least one of the support plate 111 and the soft rubber part 112 is connected to a section of the extension section 122 away from the connecting section 121. Exemplarily, the support plate 111 and the soft rubber part 112 are both connected to the extension section 122 to enhance the connection stability between the brush plate 11 and the extension section 122 and reduce the probability of the brush plate 11 falling off the extension section 122.
[0047] The support plate 111 is generally plate-shaped, and has a fur-planted surface 111a and a back surface 111b that are disposed opposite to each other. The fur-planted surface 111a is provided with bristles 13, that is, one end of the bristles 13 passes through the brush plate 11 from the fur-planted surface 111a and is fixed to the brush plate 11, and the rest of the bristles 13 pass through the fur-planted surface 111a and are used to contact the oral cavity to achieve oral cleaning. The bristles 13 can be fixed to the support plate 111 by a copper fur-planting process or a copper-free fur-planting process. The back surface 111b of the plate is disposed opposite to the fur-planted surface 111a, that is, the back surface 111b of the plate is the surface of the support plate 111 opposite to the bristles 13.
[0048] See also Figure 3-5 The soft rubber part 112 at least includes a back soft rubber 1121, and the back soft rubber 1121 is coated on the back side 111b of the plate. The soft rubber part 112 also has a soft rubber back side 112a arranged opposite to the hair-planting surface 111a. The brush plate 11 has a center dividing surface 11a that divides the brush plate 11 in half in its thickness direction and is located between the hair-planting surface 111a and the soft rubber back side 112a. That is, the center dividing surface 11a divides the support plate 11 in half in the thickness direction, and the vertical distance between the center dividing surface 11a and the central axis B of the plug-in shaft hole 121a gradually increases from the direction from the connecting section 121 to the brush plate 11, so that the brush plate 11 is tilted forward toward the side where the bristles 13 are located.
[0049] That is, the brush plate 11 is in a forward tilted shape relative to the brush handle 20. For example, the brush plate 11 may be bent forward relative to the brush rod 12 (at this time, the central axis of the brush rod 12 is set at an angle with the central axis of the brush plate 11), so that the brush plate 11 is in a forward tilted shape. The extension section 122 may be bent forward relative to the connecting section 121, so that the brush plate 11 is in a forward tilted shape (at this time, the central axis of the brush rod 12 is collinear with the central axis of the brush plate 11). The brush plate 11 may be bent relative to the brush rod 12, and the extension section 122 may be bent forward relative to the connecting section 121. It should be noted that the "front" in the aforementioned "forward" and "forward tilt" refers to the front side, which can be understood as the side where the bristles 13 are located, and the front side can also be understood as the side of the brush head 10 that can be observed by the user when the bristle surface of the bristles 13 faces the user.
[0050] In the related art, there is a driving method in which the movement 22 drives the brush head 10 to swing left and right at high frequency around the axis of the movement 22 to achieve high-frequency vibration. Corresponding to this driving method, the length extension direction of the brush plate 11 is usually the axial direction of the output shaft of the motor 223, so that the brush plate 11 has a larger bristle planting area in the axial direction of the output shaft, and more bristles 13 can be set. However, this brush plate 11 will have the following problems: since the user's teeth have multiple tooth areas, when switching from the tooth area closer to the mouth to the inner tooth area farther away from the mouth, that is, when changing areas to brush teeth, in order to make the bristle surface of the bristles 13 more fully contact the inner tooth area, the user usually needs to brush his teeth in an unnatural or uncomfortable posture, which makes the hand holding the brush handle 20 easily feel tired.
[0051] In this embodiment, the brush plate 11 is designed to be tilted forward toward the side where the bristles 13 are located. In this way, when the user holds the brush handle 20 to brush his teeth, especially when brushing in different areas, he needs to brush his teeth in a tooth area farther from the mouth (for example, the molar area inside the oral cavity). Under the same holding posture, compared with the brush head 10 of the related art, the brush plate 11 of this embodiment is relatively closer to the teeth, and the bristles 13 on the support plate 111 are also relatively closer to the teeth. In other words, to achieve the same contact area and angle between the bristles 13 and the tooth surface of the molar area, the user needs to adjust the movement amplitude relative to the natural brushing posture in this embodiment to be smaller, and the user can brush his teeth in a more natural and comfortable posture. Since the brush plate 11 and the bristles 13 are tilted forward, the user's wrist only needs to bend at a smaller angle to achieve the fit between the bristle surface and the tooth surface, thereby reducing the fatigue of the hand holding the brush handle 20 during brushing, thereby improving the comfort during brushing, improving the user's willingness to brush teeth, and helping to standardize brushing.
[0052] Furthermore, the support plate 111 in this embodiment is tilted forward, but the user is likely to ignore this feature during the process of brushing teeth, or will not notice this feature at all. Therefore, before brushing teeth, after inserting the brush head into the oral cavity, in the same brushing posture, the user expects the brush head to be in the first tooth area, but because the support plate is tilted forward, the brush head is actually in the second tooth area at this time, and there is a position and angle deviation between the first tooth area and the second tooth area. Due to this position and angle deviation, the brush head is easy to hit the teeth at the beginning of brushing teeth. Since the hardness of the soft rubber part 112 is less than the hardness of the support plate 111. In this way, during the user's brushing process, the back of the brush plate 11 contacts the user's oral cavity through the soft rubber back 112a instead of the plate back 111b. When the back soft rubber 1121 contacts the gums and teeth to generate an interaction force, it can be elastically deformed to buffer the impact force when hitting the teeth and protect the gums and teeth.
[0053] In some embodiments, the angle α between the center dividing surface 11a and the central axis B of the plug-in shaft hole 121a is not less than 3° and not more than 25°. In this way, on the one hand, the brush plate 11 has a suitable forward tilt angle, and on the other hand, the bristle surface of the brush plate 11 can be well fitted with the tooth surface, so that the bristles 13 can brush a large area of teeth.
[0054] If the angle between the center plane 11a and the central axis B of the plug-in shaft hole 121a is less than 3°, the forward tilt angle of the brush plate 11 is too small, and the user still needs to adjust the movement amplitude when brushing teeth in different areas, which makes it difficult to brush teeth in a comfortable and natural posture. If the angle between the center plane 11a and the central axis B of the plug-in shaft hole 121a is greater than 25°, the brush plate 11 may be too forward tilted, resulting in only the bristles 13 on the top area of the brush plate 11 contacting the teeth, while the bristles 13 near the brush handle 20 cannot contact the teeth, resulting in a reduced contact area between the bristles 13 and the tooth surface, and reduced brushing efficiency.
[0055] In some embodiments, when projected along the axial direction of the plug-in shaft hole 121a, the contour line of the projection of the hair-implanted surface 111a is located within the outer contour line of the projection of the connecting section 121. Figure 6 As shown by the middle dotted line C, although the brush plate 11 is tilted forward, the front side contour line of the brush plate 11 does not exceed the front side contour line of the connecting section 121. In this way, on the one hand, it can effectively avoid the bending (or folding) angle of the brush plate 11 relative to the brush rod 12, or the bending (or folding) angle of the extension section 122 relative to the connecting section 121 being too large, thereby avoiding the teeth being easily hit at the bending (or folding) position when brushing teeth, and also avoiding the problem of the brush head 10 being easily broken due to the excessive bending (or folding) angle when the brush head 10 falls. On the other hand, it can also avoid the situation where the bristles 13 are in direct contact with the desktop when the electric toothbrush 100 is placed horizontally on the desktop because the brush plate 11 is too tilted forward, causing the bristles 13 to become dirty.
[0056] See also Figure 6In some embodiments, the vertical distance between the central axis D of the extension section 122 and the central axis B of the plug-in shaft hole 121a gradually increases from the direction from the connecting section 121 to the brush plate 11, so that the extension section 122 is in a forward tilted state relative to the side where the bristles 13 are located relative to the connecting section 121. That is, the extension section 122 is in a forward tilted state relative to the brush handle 20. In this way, compared with the embodiment in which the brush plate 11 is only bent (or folded) relative to the brush rod 12, by making the brush rod 12 also in a forward tilted state, the bending (or bending) angle of the brush plate 11 relative to the extension section 122 can be reduced on the basis of making the brush plate 11 have the same forward tilt angle. In this way, the bending (or bending) angle of the brush plate 11 relative to the brush rod 12 can be effectively avoided to be too large, thereby avoiding the bending (or bending) position from easily hitting the teeth when brushing teeth, and also avoiding the problem of the connection between the brush plate 11 and the brush plate 11 being easily broken due to the excessive bending (or bending) angle when the brush head 10 falls.
[0057] See also Figure 6 In some embodiments, the rate of change of the vertical distance between the central axis D of the extension section 122 and the central axis B of the plug-in shaft hole 121a is not greater than the rate of change of the vertical distance between the center dividing surface 11a and the central axis B of the plug-in shaft hole 121a, that is, the forward tilting offset rate of the central axis D of the extension section 122 relative to the plug-in shaft hole 121a is less than or equal to the forward tilting offset rate of the central axis B of the plug-in shaft hole 121a relative to the plug-in shaft hole 121a. In this way, it can effectively avoid that the bending (or bending) angle of the brush plate 11 relative to the brush rod 12 is too large, thereby avoiding the bending (or bending) position from hitting the teeth easily when brushing teeth, and also avoiding the problem of the brush plate 11 and the brush plate 11 breaking at the connection due to the excessive bending (or bending) angle when the brush head 10 falls.
[0058] Please continue reading Figure 6In some embodiments, the extension section 122 has a back contour line away from the side where the bristles 13 are located and a front contour line 1123 facing the side where the bristles 13 are located. The distance between the front contour line 1123 and the central axis B of the plug-in shaft hole 121a is greater than the distance between the back contour line and the central axis B of the plug-in shaft hole 121a. That is, the extension section 122 is divided into the front part 1123 and the rear part 1124 along the front-to-back direction by a dividing section passing through the central axis B of the plug-in shaft hole 121a. The thickness of the front portion 1123 is greater than that of the rear portion 1124. Thus, the thicker the front portion 1123 is, the stronger the connection between the brush rod 12 and the support plate 111 and the soft rubber component 112 is. The thinner the rear portion 1124 is, the lower the probability of the rear portion 1124 contacting the teeth or gums during brushing, especially when the extension section 122 is bent (or folded) relative to the connection section 121, the lower the probability of the bent (or folded) position contacting the teeth or gums.
[0059] See also Figure 2-3 In some embodiments, the support plate 111 also has a peripheral side surface 111c located on the hair-planting surface 111a and the back side 111b of the plate, and the soft rubber part 112 also includes a peripheral side soft rubber 1122, and the peripheral side soft rubber 1122 is coated on the peripheral side surface 111c of the support plate 111, and the peripheral side soft rubber 1122 is connected to the back soft rubber 1121. During brushing, the output shaft of the motor 223 drives the brush head 10 to vibrate, and the peripheral side surface 111c of the brush head 10 is in contact with the user's oral cavity through the peripheral side soft rubber 1122 rather than the peripheral side surface 111c of the support plate 111. Since the hardness of the peripheral side soft rubber 1122 is less than the hardness of the support plate 111, when the peripheral side soft rubber 1122 vibrates synchronously with the support plate 111 and the bristles 13, the peripheral side soft rubber 1122 can be elastically deformed when it contacts with the gums and teeth to generate interaction force, so as to buffer the impact force of the peripheral side surface 111c of the support plate 111 when brushing teeth, and protect the gums and teeth.
[0060] See also Figure 2 In some embodiments, the peripheral soft glue 1122 extends to be flush with the hair planting surface 111a. In this way, on the one hand, the peripheral side surface 111c of the support plate 111 is completely covered by the peripheral soft glue 1122, which prevents the peripheral side surface 111c of the support plate 111 from being chipped, and can also improve the appearance consistency of the back side and the peripheral side surface 111c of the brush plate 11; on the other hand, it can avoid the existence of a connection seam between the peripheral soft glue 1122 and the peripheral side surface 111c, thereby avoiding the problem of dirt and grime in the connection seam.
[0061] Please continue reading Figure 2-3In some embodiments, the extension section 122 includes a neck section 1221 and a middle section 1222. The neck section 1221 is connected to the support plate 111. The middle section 1222 connects the neck section 1221 and the connection section 121. That is, the connection section 121, the middle section 1222, the neck section 1221 and the support plate 111 are connected in sequence. The soft rubber part 112 also includes neck soft rubber 1223, which is formed by extending from the back soft rubber 1121 to the neck section 1221. The neck section 1221 also extends into the user's mouth during brushing. Since the brush plate 11 is tilted forward, the neck section 1221 is raised. After the brush head 10 is placed in the user's mouth, the neck section 1221 is easy to hit the teeth. The neck soft rubber 1223 extending to the neck section 1221 covers the back side of the neck section 1221. The neck soft rubber 1223 contacts the oral cavity, which can prevent the vibrating hard neck section 1221 from directly hitting the teeth. The neck soft rubber 1223 can buffer the vibration transmitted from the neck section 1221 to the teeth, thereby improving the comfort of brushing.
[0062] Furthermore, the neck soft rubber 1223 is annularly wrapped around the neck section 1221. Therefore, on the basis of the connection between the support plate 111 and the neck section 1221, the soft rubber part 112 is also connected to the neck section 1221, and is wrapped and sleeved outside the neck section 1221, so as to enhance the connection stability between the brush plate 11 as a whole and the brush rod 12. Moreover, the neck soft rubber 1223 is wrapped around the neck section 1221, and the neck soft rubber 1223 can buffer the vibration transmitted from the neck section 1221 in all directions, further improving the comfort of brushing.
[0063] Furthermore, the connecting section 121, the middle section 1222, the neck section 1221 and the supporting plate 111 are integrally formed, which can not only simplify the production process and improve the production efficiency, but also improve the connection strength between the connected parts.
[0064] Furthermore, the back soft rubber 1121, the peripheral soft rubber 1122 and the neck soft rubber 1223 are integrally formed outside the brush plate 11 and the neck section 1121, which can not only simplify the production process and improve production efficiency; but also improve the connection strength between the connected parts, thereby improving the connection strength between the soft rubber part 112 and the brush plate 11, and reducing the risk of the soft rubber part 112 falling off the brush plate 11.
[0065] See also Figure 6 Furthermore, the outer surface of the neck soft glue 1223 and the outer surface of the middle section 1222 are smoothly transitioned to avoid the existence of a step structure between the neck soft glue 1223 and the middle section 1222, thereby avoiding the problem of dirt and grime being hidden in the step structure.
[0066] See also Figure 6In some embodiments, the surface of the neck soft glue 1223 facing away from the bristles 13 has a first length L1, and the surface of the neck soft glue 1223 facing the bristles 13 has a second length L2, and the first length L1 is greater than the second length L2. Since the surface of the neck soft glue 1223 facing away from the bristles 13 is used to contact the mouth, it is set to be longer than the surface of the neck soft glue 1223 facing the bristles 13, so that the neck soft glue 1223 can contact the mouth instead of the middle section 1223, which can improve the comfort of brushing teeth.
[0067] In some embodiments, the diameter of the circumscribed circle of the neck section 1221 is not less than 3 mm, so that the neck section 1221 has sufficient structural strength, and the connection strength between the neck section 1221 and the support plate 111 and the middle section 1222 can be improved, thereby reducing the risk of fracture of the neck section 1221 when falling. If the diameter of the circumscribed circle of the neck section 1221 is less than 3 mm, the risk of fracture of the neck section 1221 when falling will be greatly increased.
[0068] See also Figure 2-3 In some embodiments, the bristles 13 include multiple bristle clusters 131, the support plate 111 has multiple bristle planting holes (not shown in the figure), and the brush head 10 also includes multiple metal sheets (not shown in the figure), and the multiple metal sheets fix the bristle clusters 131 in the bristle planting holes one by one. That is, the bristles 13 are fixed to the support plate 111 through a copper-based bristle planting process. In this way, compared with a copper-free bristle planting process, the thickness of the support plate 111 can be reduced. On the premise that the brush head 10 has a back soft glue 1121, the overall thickness of the brush head 10 can also be made thinner, reducing the foreign body sensation of the brush head 10 in the oral cavity.
[0069] In some embodiments, one of the back side 111b of the board and the back soft glue 1121 is provided with a connecting column 1111, and the other is provided with a connecting hole 112b, and the connecting column 1111 is passed through the connecting hole 112b. In this way, the contact area between the support board 111 and the back soft glue 1121 can be further increased, and the connection stability between the support board 111 and the back soft glue 1121 can be improved.
[0070] See also Figure 1 In some embodiments, the outer contour line of the projection of the free end of the bristle 13 is located outside the outer contour line of the projection of the connecting section 121 and inside the outer contour line of the projection of the brush handle 20 when projected along the axial direction of the plug-in shaft hole 121a. That is, as shown by the dotted line E, although the bristle 13 follows the brush plate 11 to tilt forward, the front side contour line of the bristle 13 exceeds the front side wheel line of the connecting section 121 but does not exceed the front side contour line of the brush handle 20. In this way, it can be avoided that the bristle 13 is too tilted forward, and when the electric toothbrush 100 is placed horizontally on the desktop, the bristle 13 is directly in contact with the desktop, causing the bristle 13 to become dirty.
[0071] The same or similar numbers in the drawings of this embodiment correspond to the same or similar items; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0072] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A brush head for an electric toothbrush, characterized in that: include: A brush rod, the brush rod comprising a connecting section and an extending section connected to each other, the connecting section having a plug-in shaft hole for plugging and matching with the output shaft of the electric toothbrush; A brush plate and bristles, the brush plate comprising a support plate and a soft rubber part, the support plate and / or the soft rubber part being connected to the extension section, the support plate having a fur-planted surface and a back surface of the plate which are arranged opposite to each other in the thickness direction, the fur-planted surface being provided with the bristles, the soft rubber part comprising at least a back soft rubber, the back soft rubber being coated on the back surface of the plate, and the hardness of the soft rubber part being less than the hardness of the support plate; Among them, the brush plate has a center plane that divides the brush plate in half in the thickness direction. From the direction pointing from the connecting section to the brush plate, the vertical distance between the center plane and the central axis of the plug-in shaft hole gradually increases, and the brush plate is tilted forward toward the side where the bristles are located.
2. The brush head according to claim 1, characterized in that: The included angle between the center dividing surface and the central axis of the plug-in shaft hole is not less than 3° and not more than 25°.
3. The brush head according to claim 1, characterized in that: Projected along the axial direction of the plug-in shaft hole, the projected contour line of the hair-implanted surface is located within the projected outer contour line of the connecting section.
4. The brush head according to claim 1, characterized in that: From the direction in which the connecting section points to the brush plate, the vertical distance between the central axis of the extending section and the central axis of the plug-in shaft hole gradually increases, so that the extending section is inclined forward toward the side where the bristles are located relative to the connecting section.
5. The brush head according to claim 4, characterized in that: The rate of change of the vertical distance between the central axis of the extension section and the central axis of the plug-in shaft hole is not greater than the rate of change of the vertical distance between the median plane and the central axis of the plug-in shaft hole.
6. The brush head according to claim 1, characterized in that: The extension section has a back contour line away from the side where the bristles are located and a front contour line toward the side where the bristles are located, and the distance between the front contour line and the central axis of the plug-in shaft hole is greater than the distance between the back contour line and the central axis of the plug-in shaft hole.
7. The brush head according to claim 1, characterized in that: The support plate also has a peripheral side surface located on the hair-planting surface and the back of the plate, and the soft rubber part also includes: The peripheral soft glue is coated on the peripheral side of the support plate, and the peripheral soft glue is connected to the back soft glue.
8. The brush head according to claim 7, characterized in that: The peripheral soft rubber extends to be flush with the hair implantation surface.
9. The brush head according to claim 1, characterized in that: The extension section comprises: A neck section connected to the support plate; A middle section connecting the neck section and the connecting section; Wherein, the soft rubber part also includes neck soft rubber, and the neck soft rubber is formed by extending from the back soft rubber to the neck section.
10. The brush head according to claim 9, characterized in that: The neck soft rubber is annularly wrapped around the neck section.
11. The brush head according to claim 10, characterized in that: The surface of the neck soft glue facing away from the bristles has a first length, and the surface of the neck soft glue facing the bristles has a second length, and the first length is greater than the second length.
12. The brush head according to claim 9, characterized in that: The diameter of the circumscribed circle of the neck section is greater than 3 mm.
13. The brush head according to claim 1, characterized in that: The bristles include a plurality of bristle clusters, the support plate has a plurality of bristle planting holes, and the brush head further includes: A plurality of metal sheets fix the bristle clusters in the bristle planting holes in a one-to-one correspondence.
14. The brush head according to claim 1, characterized in that: One of the back side of the board and the back soft rubber is provided with a connecting column, and the other is provided with a connecting hole, and the connecting column is passed through the connecting hole.
15. The brush head according to any one of claims 1 to 14, characterized in that: The brush rod and the support plate are integrally formed, and the soft rubber part is formed on the support plate and the brush rod through an injection molding process.
16. An electric toothbrush, characterized in that: include: The brush head according to any one of claims 1 to 15; as well as A brush handle is detachably connected to the brush head.
17. The electric toothbrush according to claim 16, characterized in that: Projected along the axial direction of the plug-in shaft hole, the outer contour line of the projection of the free end of the bristle is located outside the outer contour line of the projection of the connecting section and inside the outer contour line of the projection of the brush handle.