Toothbrush head and electric toothbrush

Abstract

The utility model discloses a toothbrush head and an electric toothbrush, the toothbrush head comprises a brush head main body and a plurality of bristles, the brush head main body is provided with an accommodating cavity, the front side of the brush head main body is provided with a bristle mounting surface, the bristle mounting surface is provided with a first mounting hole, and the first mounting hole is communicated with the accommodating cavity; the accommodating cavity and the first mounting hole are configured to transmit light rays emitted by the light source, the plurality of bristles are arranged on the bristle mounting surface, at least part of the plurality of bristles is configured to be a first light guide structure, the first light guide structure is arranged in the first mounting hole and at least part of the first light guide structure extends into the accommodating cavity, and the first light guide structure is used for conducting the light rays emitted by the light source; the part, exposed out of the bristle mounting surface, of the first light guide structure emits light. By the adoption of the scheme, light rays can be prevented from being shielded by the bristles, and meanwhile the cost for replacing the toothbrush head is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oral hygiene tools, and in particular to a toothbrush head and an electric toothbrush. Background Technology

[0002] An electric toothbrush is a toothbrush that uses the rapid rotation or vibration of a motor to generate high-frequency vibrations in the brush head, instantly breaking down toothpaste into fine foam, thereby deeply cleaning between teeth.

[0003] In related technologies, to achieve the care functions of electric toothbrushes, a light source is usually installed on the toothbrush head. For example, the light source can be used for teeth whitening with cold light, or to promote the metabolism of surrounding tissues through infrared light emitted from the light source. However, the bristles on the toothbrush head can easily block the light emitted from the light source, affecting the care effect. At the same time, because the bristles on the toothbrush head are prone to getting dirty or damaged during use, the toothbrush head needs to be replaced regularly, which in turn requires the replacement of the light source, increasing the replacement cost of the toothbrush head. Utility Model Content

[0004] This utility model discloses a toothbrush head and an electric toothbrush, which can prevent the bristles from blocking light and reduce the cost of replacing toothbrush heads.

[0005] To achieve the above objectives, in a first aspect, this utility model discloses a toothbrush head, which is applied to an electric toothbrush, the electric toothbrush being equipped with a light source, and the toothbrush head comprising:

[0006] The brush head body has a receiving cavity, and the front side of the brush head body has a bristle mounting surface. The bristle mounting surface is provided with a first mounting hole, which communicates with the receiving cavity. The receiving cavity and the first mounting hole are configured to transmit light emitted by the light source.

[0007] A plurality of bristles are disposed on the bristle mounting surface. At least a portion of the plurality of bristles is configured as a first light guide structure. The first light guide structure is disposed in the first mounting hole and extends at least partially into the receiving cavity. The first light guide structure is used to conduct light emitted by the light source so that the light is emitted at the portion of the first light guide structure exposed on the bristle mounting surface.

[0008] As an optional implementation, the first light guide structure includes a bristle portion and a conductive portion. One end of the bristle portion is disposed in the first mounting hole, and the other end of the bristle portion is exposed on the bristle mounting surface. The conductive portion is disposed in the receiving cavity and connected to one end of the bristle portion. The conductive portion is configured to conduct the light emitted by the light source to the bristle portion.

[0009] As an optional implementation, the side of the conductive portion away from the bristle portion has a reflective structure, which is used to reflect the light transmitted by the conductive portion back to the bristle portion.

[0010] As an optional implementation, the brush head body has a first end and a second end opposite to each other along a first axis, wherein the first end is the end of the brush head body used to connect to the handle of the electric toothbrush;

[0011] The reflective structure includes a first inclined surface, which is set at an angle relative to the first axis. The first inclined surface has a first side and a second side opposite to each other on the first axis. The first side is closer to the first end relative to the second side, and the first side is farther away from the bristle portion relative to the second side. The angle between the first inclined surface and the first axis is a1, and the angle a1 satisfies: 40°≤a1≤60°.

[0012] The first axial direction is the direction parallel to the axis of the drive shaft of the electric toothbrush's drive motor.

[0013] As an optional implementation, there are multiple bristle portions and multiple first inclined surfaces. The multiple bristle portions are spaced apart along the first axial direction on the conductive portion. The multiple first inclined surfaces are arranged in a one-to-one correspondence with the multiple bristle portions. The multiple first inclined surfaces are spaced apart so that the conductive portion forms multiple stepped surfaces on the side away from the bristle portions.

[0014] As an optional implementation, the stepped surface includes a first inclined surface and a collimating surface. In two adjacent stepped surfaces, the collimating surface is connected between two adjacent first inclined surfaces. The collimating surface is set at an angle relative to the first axis. The collimating surface has a third side and a fourth side opposite to each other in the first axis. The third side is closer to the first end relative to the fourth side, and the third side is closer to the bristle portion relative to the fourth side.

[0015] As an optional implementation, the collimation plane makes an angle a2 with the first axis, and the angle a2 satisfies: 0°≤a2<a1.

[0016] As an optional implementation, the reflective structure further includes a reflective layer disposed on the first inclined surface, the reflective layer being used to reflect the light transmitted by the conductive part toward the bristle part.

[0017] As an optional implementation, the conductive portion includes a first portion and a second portion connected to each other along the first axial direction. The first portion and the second portion are disposed within the receiving cavity. One end of the bristle portion is connected to the first portion. The second portion has an upper surface and a lower surface along the first axial direction. At least part of the sidewall surface of the second portion is configured as an inclined surface at an angle relative to the first axial direction, such that the area of ​​the upper surface is greater than the area of ​​the lower surface, so as to collimate the light emitted by the light source.

[0018] As an optional implementation, the angle between the inclined plane of the second part and the straight line containing the first axis is a3, and the angle a3 satisfies: 10°≤a3≤15°.

[0019] As an optional implementation, the first light guide structure has a first collimator on the side facing away from the bristle mounting surface in the first axial direction. The first collimator is used to collimate the light emitted by the light source.

[0020] Secondly, this utility model also discloses an electric toothbrush, which includes a handle, a drive motor, a light source, and a toothbrush head as described in the first aspect above. The drive motor is disposed inside the handle, and the brush head body is detachably connected to the drive shaft of the drive motor. The brush head body is configured to move under the drive of the drive shaft. The light source is disposed inside the handle and is used to emit light to the first light guide structure.

[0021] As an optional implementation, the electric toothbrush further includes a second light guide structure disposed within the handle, one end of which is connected to the light source, and the other end of which extends into the receiving cavity. The second light guide structure is used to conduct the light between the first light guide structure and the light source.

[0022] As an optional implementation, a second collimator is provided between the second light guide structure and the first light guide structure, and / or a second collimator is provided between the second light guide structure and the light source, the second collimator being used to collimate the light emitted by the light source.

[0023] As an optional implementation, the drive shaft is provided with a through-hole portion, which is used for the second light guide structure to pass through into the receiving cavity.

[0024] The toothbrush head and electric toothbrush provided in this embodiment of the invention have a brush head body for connecting to the handle of the electric toothbrush, and a bristle mounting surface on the brush head body for mounting bristles, which are used to perform oral cleaning. By configuring at least a portion of the bristles as a first light guide structure, the first light guide structure is mounted in a first mounting hole on the bristle mounting surface and extends into the receiving cavity of the brush head body. The first light guide structure can conduct light emitted by the light source of the electric toothbrush, and emits light at the portion of the first light guide structure exposed on the bristle mounting surface, thereby achieving a dental care function, such as achieving a teeth whitening function or promoting the metabolism of tissues surrounding the teeth.

[0025] Meanwhile, since the first light guide structure is actually a bristle, it can both conduct light and clean the mouth, achieving structural reuse and simplifying the toothbrush head. Furthermore, the light propagation path is not blocked by bristles or other structures, improving the teeth care effect. In addition, with the first light guide structure on the toothbrush head, there's no need for a separate light source; the light source can be placed inside the handle of the electric toothbrush. When replacing the toothbrush head, the light source doesn't need to be replaced at the same time, reducing the cost of replacing the toothbrush head. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the toothbrush head disclosed in the first aspect of the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the toothbrush head structure disclosed in the first aspect of the embodiments of this application;

[0029] Figure 3 yes Figure 2 A cross-sectional view of the toothbrush head along the AA direction;

[0030] Figure 4 This is a schematic diagram of the structure of the first light guide structure disclosed in the first aspect of the embodiments of this application;

[0031] Figure 5 yes Figure 4 Enlarged view of part B;

[0032] Figure 6 This is a schematic diagram of the structure of the electric toothbrush disclosed in the second aspect of the embodiments of this application;

[0033] Figure 7 This is a cross-sectional view of a 6mm toothbrush head in the CC direction;

[0034] Figure 8 yes Figure 7 A magnified view of part D.

[0035] icon:

[0036] 1. Toothbrush head;

[0037] 10. Brush head body; 10a. First end; 10b. Second end; 100. Receiving cavity; 101. Brush bristle mounting surface; 102. First mounting hole;

[0038] 11. Brush bristles; 11a. First light guide structure; 110. Brush bristle portion; 111. Conducting portion; 1110. First part; 1111. Second part; 1111a. Upper surface; 1111b. Lower surface; 112. Reflective structure; 1120. First inclined surface; 1120a. First side edge; 1120b. Second side edge; 1121. Collimating surface; 1121a. Third side edge; 1121b. Fourth side edge;

[0039] 12. First collimator;

[0040] 2. Electric toothbrush; 20. Handle; 21. Drive motor; 210. Drive shaft; 2100. Through part; 22. Light source; 23. Second light guide structure; 24. Second collimator;

[0041] X, the first axis. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0044] Please refer to the following: Figures 1 to 3 The first aspect of this utility model provides a toothbrush head 1, which is applied to an electric toothbrush 2 (see [link]). Figure 6 The electric toothbrush 2 is equipped with a light source 22 (see [link]). Figure 8The toothbrush head 1 includes a brush head body 10 and a plurality of bristles 11. The brush head body 10 has a receiving cavity 100. The front side of the brush head body 10 has a bristle mounting surface 101, and a first mounting hole 102 is provided on the bristle mounting surface 101. The first mounting hole 102 communicates with the receiving cavity 100, and the receiving cavity 100 and the first mounting hole 102 are configured to transmit light emitted by a light source 22. The plurality of bristles 11 are disposed on the bristle mounting surface 101, and at least a portion of the plurality of bristles 11 is configured as a first light guide structure 11a. The first light guide structure 11a is disposed on the first mounting hole 102 and extends at least partially into the receiving cavity 100. The first light guide structure 11a is used to conduct light emitted by the light source 22, so that light is emitted from the portion of the first light guide structure 11a exposed on the bristle mounting surface 101.

[0045] The toothbrush head 1 provided in the first aspect of this utility model has a brush head body 10 for connecting to the handle 20 of an electric toothbrush 2. A bristle mounting surface 101 on the brush head body 10 is used to mount bristles 11, which are used to perform oral cleaning. By configuring at least a portion of the bristles 11 as a first light guide structure 11a, the first light guide structure 11a is mounted in a first mounting hole 102 on the bristle mounting surface 101 and extends into the receiving cavity 100 of the brush head body 10. The first light guide structure 11a can conduct light emitted by the light source 22 of the electric toothbrush 2, and emits light from the portion of the first light guide structure 11a exposed on the bristle mounting surface 101, thereby achieving a dental care function, such as achieving teeth whitening or promoting the metabolism of tissues surrounding the teeth.

[0046] Meanwhile, since the first light guide structure 11a is actually also a bristle 11, it can both conduct light and clean the mouth, achieving structural reuse of the bristles 11, simplifying the structure of the toothbrush head 1. Furthermore, the light propagation path is not blocked by the bristles 11 or other structures, which is beneficial for improving the dental care effect. In addition, with the first light guide structure 11a on the toothbrush head 1, there is no need to install a light source 22 on the toothbrush head 1. The light source 22 can be placed inside the handle 20 of the electric toothbrush 2. When replacing the toothbrush head 1, there is no need to replace the light source 22 at the same time, reducing the cost of replacing the toothbrush head 1.

[0047] It is understandable that the front side of the brush head body 10 refers to the side of the brush head body 10 facing the user's teeth when the toothbrush head 1 is in use, that is, when the toothbrush head 1 is cleaning the teeth.

[0048] It is understood that the first light guide structure 11a is made of a light-guiding material and is a flexible material, so that the first light guide structure 11a itself can function as a brush bristle 11 to clean the mouth, and at the same time, it can also conduct light. For example, the material of the first light guide structure 11a can be transparent silicone, transparent rubber or transparent plastic, etc., and the specific choice can be made according to the actual situation. In this embodiment, no specific limitation is made.

[0049] Optionally, all of the multiple bristles 11 can be configured as the first light guide structure 11a, that is, all of the multiple bristles 11 have the function of guiding light. Alternatively, some of the multiple bristles 11 can be configured as the first light guide structure 11a, that is, some of the multiple bristles 11 have the function of guiding light, while the remaining bristles 11 are ordinary bristles 11 without the function of guiding light. The specific configuration can be selected according to the actual situation, and no specific limitation is made in this embodiment.

[0050] In some embodiments, the first light guide structure 11a includes a bristle portion 110 and a conductive portion 111. One end of the bristle portion 110 is disposed in the first mounting hole 102, and the other end of the bristle portion 110 is exposed on the bristle mounting surface 101. The conductive portion 111 is disposed in the receiving cavity 100 and connected to one end of the bristle portion 110. The conductive portion 111 is configured to conduct light emitted by the light source 22 to the bristle portion 110.

[0051] In this way, the bristle portion 110 makes direct contact with the user's teeth to clean the oral cavity. Simultaneously, the bristle portion 110 also serves as the point where light is emitted towards the user's teeth, providing dental care. Since the brush head body 10 has a certain length along the first axis X, the transmission portion 111 transmits the light from the light source 22 to the bristle portion 110, ensuring that the light from the light source 22 is emitted from the portion of the bristle portion 110 exposed on the bristle mounting surface 101.

[0052] It is understood that the first axial direction X refers to the direction parallel to the axis of the drive shaft 210 of the drive motor 21 of the electric toothbrush 2.

[0053] Optionally, the number of bristle sections 110 may be one or more, and the specific selection can be made according to the actual situation. In this embodiment, no specific limitation is made.

[0054] Optionally, the bristle portion 110 and the conduction portion 111 can be integrally formed or separately formed, depending on the actual situation, and are not specifically limited in this embodiment.

[0055] In some embodiments, portions of the multiple bristles 11 are configured as a first light guide structure 11a, and the bristle portion 110 of the first light guide structure 11a is located in the middle of the multiple bristles 11. In order to make the wall thickness of the brush head body 10 more uniform, the receiving cavity 100 is usually opened on the central axis of the brush head body 10, and the conductive portion 111 is also roughly arranged on the central axis of the brush head body 10. By setting the bristle portion 110 of the first light guide structure 11a in the middle of the multiple bristles 11, the bristle portion 110 and the conductive portion 111 are flush in the width direction of the brush head body 10 (i.e., when the bristles 11 face the user, corresponding to the left and right direction of the user). When the light propagates on the conductive portion 111 and the bristle portion 110, it does not need to change its direction in the width direction of the brush head body 10, which is beneficial to simplify the optical path design, that is, to simplify the structure of the first light guide structure 11a, and at the same time improve the light transmission efficiency.

[0056] Please see Figure 4 In some embodiments, the conductive portion 111 has a reflective structure 112 on the side opposite to the bristle portion 110, and the reflective structure 112 is used to reflect the light transmitted by the conductive portion 111 back to the bristle portion 110.

[0057] Since the bristles 11 and the brush head body 10 are usually at a certain angle (e.g., 90°, 89° or 91°), by providing a reflective structure 112 on the side of the conductive part 111 away from the bristle part 110, the angle of the light transmitted by the conductive part 111 can be changed, thereby allowing the light to be transmitted to the bristle part 110, so that the light can be emitted from the bristle part 110 and effectively act on the user's teeth. Furthermore, the reflective structure 112 can reduce light loss and improve the light propagation efficiency.

[0058] Optionally, the reflective structure 112 may include a reflective surface on the conductive part 111, or the reflective structure 112 may also include an additional reflective coating or a reflector, etc., which can be selected according to the actual situation, and are not specifically limited in this embodiment.

[0059] Please refer to the following: Figures 3 to 5 In some embodiments, the brush head body 10 has a first end 10a and a second end 10b opposite to each other along its first axial direction X. The first end 10a is the end of the brush head body 10 used to connect with the handle 20 of the electric toothbrush 2. The reflective structure 112 includes a first inclined surface 1120, which is set at an angle relative to the first axial direction X. The first inclined surface 1120 has a first side 1120a and a second side 1120b opposite to each other along the first axial direction X. The first side 1120a is closer to the first end 10a than the second side 1120b, and the first side 1120a is farther away from the bristle portion 110 than the second side 1120b. The angle between the first inclined surface 1120 and the first axial direction X is a1, and the angle a1 satisfies: 40°≤a1≤60°.

[0060] In this way, the first inclined surface 1120 is a reflective surface. The first inclined surface 1120 can change the propagation direction of light from the first end 10a to the second end 10b of the brush head body 10, so that the light propagates from the first inclined surface 1120 to the part of the bristle part 110 exposed on the bristle mounting surface 101, thereby allowing the light to be emitted from the bristle part 110 and effectively act on the user's teeth.

[0061] For example, a1 can be 40°, 50° or 60°, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0062] In some embodiments, there are multiple bristle portions 110 and multiple first inclined surfaces 1120. Multiple bristle portions 110 are spaced apart along the first axial direction X on the conductive portion 111. Multiple first inclined surfaces 1120 are arranged in a one-to-one correspondence with multiple bristle portions 110. Multiple first inclined surfaces 1120 are spaced apart so that multiple stepped surfaces are formed on the side of the conductive portion 111 away from the bristle portions 110.

[0063] By setting multiple first inclined surfaces 1120 corresponding one-to-one with the bristle portions 110, and the multiple spaced first inclined surfaces 1120 forming a stepped surface, on the one hand, each first inclined surface 1120 can reflect a portion of the light transmitted by the conductive portion 111 back to each bristle portion 110, making the amount of light emitted from each bristle portion 110 relatively uniform. That is, it can make the light emitted from each bristle portion 110 more uniform, improving the uniformity of the dental care effect. On the other hand, it can prevent light from propagating into the gap between two adjacent bristle portions 110 and being blocked by the brush head body 10, reducing light loss and improving the actual utilization rate of light.

[0064] For example, the number of bristle sections 110 can be two, three, or four, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0065] In some embodiments, the stepped surface includes a first inclined surface 1120 and a collimating surface 1121. In two adjacent stepped surfaces, the collimating surface 1121 is connected between two adjacent first inclined surfaces 1120. The collimating surface 1121 is set at an angle relative to the first axial direction X. The collimating surface 1121 has a third side 1121a and a fourth side 1121b opposite to each other in the first axial direction X. The third side 1121a is closer to the first end 10a than the fourth side 1121b, and the third side 1121a is closer to the bristle portion 110 than the fourth side 1121b.

[0066] In this way, the collimating surface 1121 can collimate the light rays before they enter the first inclined surface 1120, so that the propagation direction of the light rays is parallel to or nearly parallel to the first axis X. This is beneficial to make the actual propagation path of the light rays close to the propagation path designed in the design, thereby improving the actual utilization rate of the light rays.

[0067] In some embodiments, the collimation plane 1121 makes an angle a2 with the first axis X, and the angle a2 satisfies: 0°≤a2<a1.

[0068] When the angle α2 between the collimating surface 1121 and the first axis X is large, the length of the first inclined surface 1120 required to form the stepped surface by the multiple first inclined surfaces 1120 is larger. Therefore, setting the angle α2 to be relatively small is beneficial to improving the collimation effect of the collimating surface 1121, making the light transmitted by the transmission part 111 closer to being parallel to the first axis X. This avoids the angle of the collimating surface 1121 being too large, which would result in a large length of the first inclined surface 1120, and helps to reduce the volume of the first light guide structure 11a.

[0069] In some embodiments, the reflective structure 112 further includes a reflective layer (not shown) disposed on the first inclined surface 1120, which is used to reflect the light transmitted by the conductive part 111 toward the bristle part 110.

[0070] Since the first inclined surface 1120 is a reflective surface on the conductive part 111, some light will still be refracted from the first inclined surface 1120 and exit the conductive part 111, resulting in light loss. By providing a reflective layer on the first inclined surface 1120, the reflection efficiency of the first inclined surface 1120 can be further improved, thereby further reducing light loss.

[0071] Optionally, the reflective layer may be a silicon dioxide reflective coating or a metal reflective coating, etc., and the specific choice can be made according to the actual situation. In this embodiment, no specific limitation is made.

[0072] In some embodiments, the conductive portion 111 includes a first portion 1110 and a second portion 1111 connected to each other along a first axial direction X. The first portion 1110 and the second portion 1111 are disposed in the receiving cavity 100. One end of the bristle portion 110 is connected to the first portion 1110. The second portion 1111 has an upper surface 1111a and a lower surface 1111b along the first axial direction X. At least part of the sidewall surface of the second portion 1111 is configured as an inclined surface at an angle relative to the first axial direction X, such that the area of ​​the upper surface 1111a is larger than the area of ​​the lower surface 1111b, so as to collimate the light emitted by the light source 22.

[0073] In this way, the first part 1110 of the conductive part 111 can conduct light and support the bristle part 110. The second part 1111 of the conductive part 111, while conducting light, can collimate the light emitted by the light source 22, so that the propagation direction of the light is parallel to or close to the first axis X. This is beneficial to make the actual propagation path of the light close to the propagation path designed, thereby improving the actual utilization rate of the light.

[0074] In some embodiments, the angle between the inclined plane of the second part 1111 and the straight line containing the first axial direction X is a3, and the angle a3 satisfies: 1°≤a3≤3°.

[0075] On the one hand, a relatively small included angle a3 is beneficial for improving the collimation effect of the inclined plane, so that the light transmitted by the transmission part 111 is closer to being parallel to the first axis X. On the other hand, since the smaller the included angle a3 is, the more reflections are required for light collimation, and the longer the required length of the transmission part 111 is. Therefore, the included angle a3 is not too small, which avoids the transmission part 111 from being too long, which is beneficial for the miniaturization design of the brush head body 10 in the first axis X.

[0076] For example, a3 can be 1°, 1.5°, 2.5° or 3°, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0077] In some embodiments, the first light guide structure 11a is provided with a first collimator 12 on the side opposite to the brush mounting surface 101 in the first axial direction X. The first collimator 12 is used to collimate the light emitted by the light source 22.

[0078] By providing a first collimator 12 on the first light guide structure 11a, when the toothbrush head 1 is connected to the handle 20 of the electric toothbrush 2, the first collimator 12 can collimate the light emitted from the light source 22, improve the coupling efficiency, and thus improve the light's effect on tooth care.

[0079] Optionally, the first collimator 12 can be a reflector or a collimating lens, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0080] Please refer to the following: Figures 6 to 8 The second aspect of this utility model discloses an electric toothbrush 2, which includes a handle 20, a drive motor 21, a light source 22, and a toothbrush head 1 as described in the first aspect of the above embodiment. The drive motor 21 is disposed inside the handle 20, and the brush head body 10 is detachably connected to the drive shaft 210 of the drive motor 21. The brush head body 10 is configured to move under the drive of the drive shaft 210. The light source 22 is disposed inside the handle 20 and is used to emit light to the first light guide structure 11a.

[0081] The electric toothbrush 2 provided in the second aspect of this utility model has a drive motor 21 used to drive the toothbrush head 1 to move via a drive shaft 210. Since the electric toothbrush 2 uses the toothbrush head 1 provided in the first aspect of this utility model, the bristle mounting surface 101 on the brush head body 10 is used to mount bristles 11, which are used to perform oral cleaning. By configuring at least a portion of the multiple bristles 11 as a first light guide structure 11a, the first light guide structure 11a is mounted in a first mounting hole 102 on the bristle mounting surface 101 and extends into the receiving cavity 100 of the brush head body 10. The first light guide structure 11a can conduct light emitted by the light source 22 of the electric toothbrush 2, and emits light from the portion of the first light guide structure 11a exposed on the bristle mounting surface 101, thereby achieving a dental care function, such as achieving a teeth whitening function or promoting the metabolism of tissues surrounding the teeth.

[0082] Meanwhile, since the first light guide structure 11a is actually also a bristle 11, it can both conduct light and clean the mouth, achieving structural reuse of the bristles 11, simplifying the structure of the toothbrush head 1. Furthermore, the light propagation path is not blocked by the bristles 11 or other structures, which is beneficial for improving the dental care effect. In addition, since the first light guide structure 11a is provided on the toothbrush head 1, there is no need to install a light source 22 on the toothbrush head 1. The light source 22 is located inside the handle 20. When replacing the toothbrush head 1, there is no need to replace the light source 22 at the same time, reducing the cost of replacing the toothbrush head 1.

[0083] Optionally, the light source 22 can be an LED lamp bead or an infrared lamp, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0084] In some embodiments, the electric toothbrush 2 further includes a second light guide structure 23, which is disposed in the handle 20. One end of the second light guide structure 23 is connected to the light source 22, and the other end of the second light guide structure 23 extends into the receiving cavity 100. The second light guide structure 23 is used to conduct light between the first light guide structure 11a and the light source 22.

[0085] Since the light source 22 is located inside the handle 20, and the first light guide structure 11a is located inside the receiving cavity 100 of the brush head body 10, there is a certain distance between the light source 22 and the first light guide structure 11a along the first axis X. By setting the second light guide structure 23, the second light guide structure 23 can conduct light between the light source 22 and the first light guide structure 11a, which helps to improve the light transmission efficiency, thereby improving the light's effect on dental care.

[0086] Optionally, the second light guide structure 23 can be optical fiber, glass, or transparent plastic, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0087] Optionally, one end of the second light guide structure 23 may be flush with the side of the drive shaft 210 facing the toothbrush head 1, or located inside the drive shaft 210, which can protect the second light guide structure 23 and prevent the second light guide structure 23 from being exposed to the drive shaft 210 and easily damaged.

[0088] Please see Figure 8 In some embodiments, a second collimator 24 is provided between the second light guide structure 23 and the first light guide structure 11a, and / or a second collimator 24 is provided between the second light guide structure 23 and the light source 22, the second collimator 24 being used to collimate the light emitted by the light source 22.

[0089] Optionally, the second collimator 24 can be a reflector or a collimating lens, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0090] In one example, a second collimator 24 is provided between the second light guide structure 23 and the first light guide structure 11a. The second collimator 24 is used to collimate the light emitted by the light source 22. By providing the second collimator 24 between the second light guide structure 23 and the first light guide structure 11a, the second collimator 24 can collimate the light propagating from the second light guide structure 23 to the first light guide structure 11a, improving coupling efficiency and thus enhancing the light's effect on dental care.

[0091] Optionally, the second collimator 24 can be disposed in the first light guide structure 11a, that is, the second collimator 24 can be disposed inside the toothbrush head 1. Alternatively, the second collimator 24 can also be disposed in the second light guide structure 23, that is, the second collimator 24 can also be disposed inside the handle 20. The specific choice can be made according to the actual situation, and no specific limitation is made in this embodiment. When the second collimator 24 is disposed in the second light guide structure 23, it is not necessary to replace the second collimator 24 when replacing the toothbrush head 1, which helps to reduce the cost of replacing the toothbrush head 1.

[0092] In another example, a second collimator 24 is provided between the second light guide structure 23 and the light source 22. The second collimator 24 is used to collimate the light emitted by the light source 22. By providing the second collimator 24 between the second light guide structure 23 and the light source 22, the second collimator 24 can collimate the light propagating from the light source 22 to the second light guide structure 23, improving coupling efficiency and thus enhancing the light's effect on dental care.

[0093] In another example, a second collimator 24 is provided between the second light guide structure 23 and the first light guide structure 11a, and also between the second light guide structure 23 and the light source 22. The second collimator 24 is used to collimate the light emitted by the light source 22. By providing the second collimator 24 between the second light guide structure 23 and the first light guide structure 11a, and between the second light guide structure 23 and the light source 22, the second collimator 24 can collimate the light propagating from the light source 22 to the second light guide structure 23, and also collimate the light propagating from the second light guide structure 23 to the first light guide structure 11a, thereby improving coupling efficiency and thus enhancing the light's effect on dental care.

[0094] In some embodiments, the drive shaft 210 is provided with a through portion 2100 for the second light guide structure 23 to pass through into the receiving cavity 100.

[0095] By providing a through-hole 2100 on the drive shaft 210, when the toothbrush head 1 is connected to the handle 20, the second light guide structure 23 can pass through from the light source 22 into the receiving cavity 100, thereby achieving connection with the first light guide structure 11a. This effectively utilizes the space within the drive shaft 210, making the electric toothbrush 2 more compact, while also not affecting the transmission effect of the drive shaft 210 on the toothbrush head 1.

[0096] Optionally, the through portion 2100 may be a through hole or through groove extending along the first axial direction X on the drive shaft 210. The specific choice can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0097] Optionally, a sealant or glass cover can be provided on the side of the drive shaft 210 facing the toothbrush head 1 to cover the through part 2100. This ensures that the second light guide structure 23 and the first light guide structure 11a can transmit light, while reducing the occurrence of water, dust and other substances from the external environment entering the handle 20 through the through part 2100.

[0098] The toothbrush head and electric toothbrush disclosed in the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the embodiments above is only for the purpose of helping to understand the toothbrush head and electric toothbrush of this utility model and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A toothbrush head, characterized in that, The toothbrush head is used in an electric toothbrush, which is equipped with a light source and includes: The brush head body has a receiving cavity, and the front side of the brush head body has a bristle mounting surface. The bristle mounting surface is provided with a first mounting hole, which communicates with the receiving cavity. The receiving cavity and the first mounting hole are configured to transmit light emitted by the light source. A plurality of bristles are disposed on the bristle mounting surface. At least a portion of the plurality of bristles is configured as a first light guide structure. The first light guide structure is disposed in the first mounting hole and extends at least partially into the receiving cavity. The first light guide structure is used to conduct light emitted by the light source so that the light is emitted at the portion of the first light guide structure exposed on the bristle mounting surface.

2. The toothbrush head according to claim 1, characterized in that, The first light guide structure includes a bristle portion and a conductive portion. One end of the bristle portion is disposed in the first mounting hole, and the other end of the bristle portion is exposed on the bristle mounting surface. The conductive portion is disposed in the receiving cavity and connected to one end of the bristle portion. The conductive portion is configured to conduct the light emitted by the light source to the bristle portion.

3. The toothbrush head according to claim 2, characterized in that, The conductive part has a reflective structure on the side opposite to the bristle part, and the reflective structure is used to reflect the light transmitted by the conductive part back to the bristle part.

4. The toothbrush head according to claim 3, characterized in that, The brush head body has a first end and a second end opposite to each other along a first axis, wherein the first end is the end of the brush head body used to connect to the handle of the electric toothbrush; The reflective structure includes a first inclined surface, which is set at an angle relative to the first axis. The first inclined surface has a first side and a second side opposite to each other on the first axis of the brush head body. The first side is closer to the first end relative to the second side, and the first side is farther away from the bristle portion relative to the second side. The angle between the first inclined surface and the first axis is a1, and the angle satisfies: 40°≤a1≤60°. The first axial direction is the direction parallel to the axis of the drive shaft of the electric toothbrush's drive motor.

5. The toothbrush head according to claim 4, characterized in that, The number of the bristle portions and the first inclined surfaces is multiple. The multiple bristle portions are spaced apart along the first axial direction on the conductive portion. The multiple first inclined surfaces are arranged in a one-to-one correspondence with the multiple bristle portions. The multiple first inclined surfaces are spaced apart so that the conductive portion forms multiple stepped surfaces on the side away from the bristle portions.

6. The toothbrush head according to claim 5, characterized in that, The stepped surface includes a first inclined surface and a collimating surface. In two adjacent stepped surfaces, the collimating surface is connected between two adjacent first inclined surfaces. The collimating surface is set at an angle relative to the first axis. The collimating surface has a third side and a fourth side opposite to each other in the first axis. The third side is closer to the first end relative to the fourth side, and the third side is closer to the bristle portion relative to the fourth side.

7. The toothbrush head according to claim 6, characterized in that, The collimation plane makes an angle a2 with the first axis, and the angle a2 satisfies: 0°≤a2<a1.

8. The toothbrush head according to claim 4, characterized in that, The reflective structure further includes a reflective layer disposed on the first inclined surface, the reflective layer being used to reflect the light transmitted by the conductive part toward the bristle part.

9. The toothbrush head according to any one of claims 2-8, characterized in that, The conductive portion includes a first portion and a second portion connected to each other along a first axial direction. The first portion and the second portion are disposed within the receiving cavity. One end of the bristle portion is connected to the first portion. The second portion has an upper surface and a lower surface along the first axial direction. At least part of the sidewall surface of the second portion is configured as an inclined surface at an angle relative to the first axial direction, such that the area of ​​the upper surface is greater than the area of ​​the lower surface, so as to collimate the light emitted by the light source.

10. The toothbrush head according to claim 9, characterized in that, The angle between the inclined plane of the second part and the straight line containing the first axis is a3, and the angle satisfies: 10°≤a3≤15°.

11. The toothbrush head according to any one of claims 1-8, characterized in that, The first light guide structure has a first collimator on the side facing away from the bristle mounting surface along the first axis. The first collimator is used to collimate the light emitted by the light source.

12. An electric toothbrush, characterized in that, The electric toothbrush includes a handle, a drive motor, a light source, and a toothbrush head as described in any one of claims 1-11. The drive motor is disposed inside the handle, and the brush head body is detachably connected to the drive shaft of the drive motor. The brush head body is configured to move under the drive of the drive shaft. The light source is disposed inside the handle and is used to emit light to the first light guide structure.

13. The electric toothbrush according to claim 12, characterized in that, The electric toothbrush also includes a second light guide structure, which is disposed inside the handle. One end of the second light guide structure is connected to the light source, and the other end of the second light guide structure extends into the receiving cavity. The second light guide structure is used to conduct the light between the first light guide structure and the light source.

14. The electric toothbrush according to claim 13, characterized in that, A collimator is provided between the second light guide structure and the first light guide structure, and / or a collimator is provided between the second light guide structure and the light source, the collimator being used to collimate the light emitted by the light source.

15. The electric toothbrush according to claim 13, characterized in that, The drive shaft is provided with a through-hole portion, which is used for the second light guide structure to pass through into the receiving cavity.

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