Brush head assembly and toothbrush

Abstract

The brush head assembly comprises a toothbrush sleeve, a flexible body and at least two bristle bundle assemblies, a first containing cavity is formed in the toothbrush sleeve, a sliding connection hole is further formed in the toothbrush sleeve, the first containing cavity communicates with the outside through the sliding connection hole, and the flexible body is contained in the first containing cavity; the hair bundle assemblies are movably arranged in the sliding connection holes in a penetrating mode, at least one hair bundle assembly moves towards the flexible body under the action of external pressure to extrude the flexible body, so that the flexible body applies acting force to the other hair bundle assemblies, and the direction of the acting force is away from the flexible body. According to the toothbrush, the flexible body is arranged in the first containing cavity in the toothbrush sleeve, and the flexible body is extruded by the at least one bristle bundle assembly under the action of external pressure, so that the flexible body deforms and applies acting force to other bristle bundle assemblies, the bristle bundle assemblies are fully attached to teeth, and the cleanliness is improved.

Description

Technical Field

[0001] The present application relates to the technical field of toothbrushes, and in particular to a brush head assembly and a toothbrush. Background Art

[0002] As people's living standards continue to improve, they are paying more and more attention to oral hygiene and health. Teeth are one of the important organs of the human body. In daily life, the hardness, acidity and alkalinity of food can cause various damages to teeth. Poor tooth protection affects daily diet, which leads to a decline in physical health. Since the shape, size and condition of each person's teeth are different, it is difficult to ensure that the toothbrush bristles fully fit the teeth, which in turn affects the cleaning efficiency of the teeth.

[0003] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and provides a brush head assembly and a toothbrush.

[0005] According to one aspect of the present application, the present application provides a brush head assembly, including a toothbrush cover, a flexible body and at least two groups of bristle bundle components, the toothbrush cover having a first accommodating cavity inside, and the toothbrush cover also having a sliding hole, the first accommodating cavity being connected to the outside through the sliding hole, and the flexible body being accommodated in the first accommodating cavity; each of the bristle bundle components is movably inserted into the sliding hole, and at least one group of bristle bundle components moves toward the flexible body under the action of external pressure and squeezes the flexible body, so that the flexible body applies a force to the remaining bristle bundle components, and the direction of the force is away from the flexible body.

[0006] Furthermore, the hair bundle assembly comprises a fixing sleeve and a hair bundle body, the fixing sleeve is sleeved on the outer periphery of the hair bundle body, and the fixing sleeve is movably inserted into the sliding hole.

[0007] Optionally, the hair bundle assembly further comprises an elastic member, the fixing sleeve is connected to the toothbrush sleeve via the elastic member, and the elastic member is used to drive the fixing sleeve to move toward the flexible body.

[0008] Furthermore, the brush head assembly has a first direction, and the flexible body and the hair bundle assembly are arranged opposite to each other along the first direction; the sliding hole is divided into a first hole section and a second hole section along the first direction, the first hole section is far away from the flexible body relative to the second hole section, and the cross-sectional area of ​​the first hole section is smaller than the cross-sectional area of ​​the second hole section, so that a first limiting surface is formed at the connection between the first hole section and the second hole section; the outer side wall of the fixed sleeve is divided into a first sliding portion and a second sliding portion along the first direction, the first sliding portion is far away from the flexible body relative to the second sliding portion, and the cross-sectional area of ​​the first sliding portion is smaller than the cross-sectional area of ​​the second sliding portion, so that a second limiting surface is formed at the connection between the first sliding portion and the second sliding portion; the elastic member is connected between the first limiting surface and the second limiting surface.

[0009] Furthermore, the hair bundle assembly also includes a sealing ring, and the sealing ring is sleeved on the outer circumference of the fixing sleeve.

[0010] Furthermore, the brush head assembly also has a reference plane, which is perpendicular to the direction in which the flexible body and the bristle bundle assembly are relative to each other; the bristle bundle assembly also includes a supporting pad, which is arranged on the fixed sleeve and the end of the bristle bundle body facing the flexible body, and the orthographic projection of the supporting pad on the reference plane overlaps with the orthographic projection of the fixed sleeve on the reference plane and the orthographic projection of the bristle bundle body on the reference plane.

[0011] Furthermore, the toothbrush cover comprises a base and a mounting seat, the mounting seat has the first accommodating cavity, the base has a second accommodating cavity, and the mounting seat is accommodated in the second accommodating cavity.

[0012] Furthermore, the mounting seat includes a bottom cover and a sleeve shell, and the bottom cover and the sleeve shell cooperate to enclose the first accommodating cavity.

[0013] Furthermore, it also includes a connecting sleeve, which is plugged into the toothbrush sleeve.

[0014] According to another aspect of the present application, a toothbrush is provided, comprising a brush head assembly as described in any one of the above, the toothbrush further comprising a brush handle assembly, and the brush handle assembly is connected to the toothbrush cover.

[0015] The beneficial effect of the present application is: different from the prior art, the brush head assembly provided by the present application is configured with a flexible body in the first accommodating cavity inside the toothbrush cover, and at least one group of bristle bundle components extrude the flexible body under the action of external pressure, so that the flexible body is deformed and exerts force on other bristle bundle components. The positions of different bristle bundle components can be adaptively adjusted according to the different teeth, so that the bristle bundle components are fully fitted with the teeth and the forces exerted on the teeth are equal, thereby improving the cleanliness of the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of a brush head assembly provided in an embodiment of the present application.

[0018] Figure 2 yes Figure 1 Top view of the .

[0019] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle.

[0020] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0021] Figure 5 yes Figure 4 Enlarged view of point C in the middle.

[0022] Figure 6 yes Figure 2 A cross-sectional view of another embodiment at AA.

[0023] Figure 7 yes Figure 6 Enlarged view of point D in the middle.

[0024] Figure 8 yes Figure 7 Enlarged view of point E in the middle.

[0025] Fig. 9 It is an exploded schematic diagram of a brush head assembly provided in an embodiment of the present application.

[0026] Fig.10 It is a schematic diagram of the structure of the hair bundle assembly and the flexible body provided in the embodiment of the present application.

[0027] In the figure:

[0028] 10. Brush head assembly; 11. Toothbrush cover; 111. First accommodating cavity; 112. Sliding hole; 1121. First hole section; 1122. Second hole section; 1123. First limiting surface; 113. Base; 1131. Second accommodating cavity; 12. Flexible body; 13. Hair bundle assembly; 131. Fixed sleeve; 1311. First sliding part; 1312. Second sliding part; 1313. Second limiting surface; 132. Hair bundle body; 133. Elastic member; 134. Positioning groove; 135. Sealing ring; 136. Support pad; 14. Mounting seat; 141. Bottom cover; 142. Shell; 15. Connecting sleeve; 16. Mounting block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The brush head assembly and toothbrush in the present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0032] In order to solve the technical problems of uneven force and poor cleaning degree of toothbrushes in the prior art, an embodiment of the present application provides a brush head assembly, including a toothbrush cover, a flexible body and at least two groups of bristle bundle components, wherein the toothbrush cover has a first accommodating cavity inside, and the toothbrush cover is also provided with a sliding hole, the first accommodating cavity is connected to the outside through the sliding hole, and the flexible body is accommodated in the first accommodating cavity; each of the bristle bundle components is movably inserted into the sliding hole, and at least one group of bristle bundle components moves toward the flexible body under the action of external pressure to squeeze the flexible body, so that the flexible body applies a force to the remaining bristle bundle components, and the direction of the force is away from the flexible body. This is explained in detail below.

[0033] See also Figure 3 and Figure 4In one embodiment, the brush head assembly 10 includes a toothbrush cover 11, a flexible body 12 and at least two groups of bristle assemblies 13. In this embodiment, the number of the bristle assemblies 13 is eighteen. In other embodiments, the number of the bristle assemblies 13 can be other numbers, not limited to this, and is determined according to the actual toothbrush product. The toothbrush cover 11 has a first accommodating cavity 111 inside, and the toothbrush cover 11 is also provided with a sliding hole 112. The first accommodating cavity 111 is connected to the outside through the sliding hole 112. The flexible body 12 is accommodated in the first accommodating cavity 111, and each of the bristle assemblies 13 can be movably inserted into the sliding hole 112.

[0034] It should be noted that the flexible body 12 has a certain volume and can be deformed under the action of external force, and the flexible body 12 is filled in the first accommodating cavity 111. In this embodiment, the flexible body 12 can be liquid silicone, and can also be other materials in other embodiments, but is not limited to this; one end of the hair bundle component 13 is in contact with the flexible body 12, and the other end is passed through the sliding hole 112, that is, the hair bundle component 13 is movably passed through the sliding hole 112. When in use, at least one group of hair bundle components 13 moves toward the flexible body 12 under the action of external pressure and squeezes the flexible body 12, so that the flexible body 12 exerts a force on the other hair bundle components 13, and the direction of the force is away from the flexible body 12, that is, when brushing your teeth. When the hair bundle component 13 touches the tooth surface away from the oral cavity first, the tooth surface applies an extrusion force toward the flexible body 12 to the hair bundle component 13 in contact with it, and the flexible body 12 is deformed under the action of the extrusion force. Since the volume of the flexible body 12 does not change, the flexible body 12 will apply an ejection force to the hair bundle component 13 that is not in contact with the tooth surface. Under the action of the ejection force, the hair bundle component 13 moves in the direction away from the above-mentioned flexible body 12 until it abuts against the tooth surface. In this way, it can be ensured that the hair bundle component 13 is in full contact with the tooth surface, and the forces exerted on the tooth surface by different hair bundle components 13 are equal, which is conducive to improving the cleanliness of the teeth. In addition, the setting does not limit the size, shape or condition of the user's teeth, has strong practicality and applicability, and has a simple and reliable structure and low cost of use.

[0035] In addition, the brush head assembly 10 needs to be used together with the brush handle assembly during actual use. The brush head assembly 10 and the brush handle assembly are combined into a toothbrush. The brush handle assembly is connected to the toothbrush cover 11. Figure 1 and Figure 2 In one embodiment, the brush handle assembly is connected to the brush head assembly 10. The brush head assembly 10 can be replaced after being used for a period of time, thereby reducing the cost of use.

[0036] It should be noted that the above-mentioned toothbrush can be a manual toothbrush or an electric toothbrush. When the above-mentioned toothbrush is an electric toothbrush, the above-mentioned brush handle assembly includes a drive shaft, which is transmission-connected to the above-mentioned brush head assembly 10. The drive shaft drives the above-mentioned brush head assembly 10 in a swinging or other form of drive, which can be a single drive mode or a switching of multiple drive modes. It will not be elaborated here, and the drive mode and type are determined according to actual use.

[0037] See also Figure 5 In one embodiment, the hair bundle assembly 13 includes a fixing sleeve 131 and a hair bundle body 132 . The fixing sleeve 131 is sleeved on the outer periphery of the hair bundle body 132 , and the fixing sleeve 131 is movably inserted into the sliding hole 112 .

[0038] It should be noted that the hair bundle body 132 is composed of a plurality of bristles for cleaning teeth. In the actual assembly process, one end of the plurality of bristles can be coated with glue or wound to form a whole, so that the hair bundle body 132 can be plugged into the fixed sleeve 131. The setting of the fixed sleeve 131 facilitates assembly while ensuring that the height adjustment of the hair bundle body 132 is stable and reliable. The height adjustment of the hair bundle body 132 is Fig.10 In the perspective, the hair bundle body 132 is close to the end of the flexible body 12 to the height of the flexible body 12, and in some embodiments, after the hair bundle body 132 is assembled and completed, it presents a style with a low middle and high ends (such as Fig.10 As shown), it is similar to the shape of the tooth surface of the human body, which is conducive to the fit between the hair bundle body 132 and the tooth surface. In other embodiments, it can also be arranged in other forms, not limited to this.

[0039] Continue reading Figure 5 The hair bundle assembly 13 further includes an elastic member 133, and the fixing sleeve 131 is connected to the toothbrush cover 11 through the elastic member 133, and the elastic member 133 is used to drive the fixing sleeve 131 to move toward the flexible body 12, that is, to reset the fixing sleeve 131. After brushing, each hair bundle assembly 13 can be restored to its initial position. In this embodiment, the brush head assembly 10 has a first direction (such as Figure 3 The flexible body 12 and the hair bundle assembly 13 are arranged opposite to each other along the first direction, and the sliding hole 112 is divided into a first hole section 1121 and a second hole section 1122 along the first direction, and the first hole section 1121 is away from the flexible body 12 relative to the second hole section 1122, that is, Figure 5From the perspective, the first hole section 1121 is arranged above the second hole section 1122, and at the same time, the cross-sectional area of ​​the first hole section 1121 is smaller than the cross-sectional area of ​​the second hole section 1122, so that the connection between the first hole section 1121 and the second hole section 1122 forms a first limiting surface 1123; at the same time, the outer wall of the fixing sleeve 131 is divided into a first sliding connection portion 1311 and a second sliding connection portion 1312 along the first direction, and the first sliding connection portion 1311 is away from the flexible body 12 relative to the second sliding connection portion 1312, and the cross-sectional area of ​​the first sliding connection portion 1311 is smaller than the cross-sectional area of ​​the second sliding connection portion 1312, so that the connection between the first sliding connection portion 1311 and the second sliding connection portion 1312 forms a second limiting surface 1313.

[0040] It should be noted that the cross section is a surface perpendicular to the first direction, and the first sliding portion 1311 is slidably connected to the first hole section 1121, and the second sliding portion 1312 is slidably connected to the second hole section 1122. In this embodiment, the first limiting surface 1123 and the second limiting surface 1313 are arranged opposite to each other. Through the structural arrangement of the sliding hole 112 and the fixing sleeve 131, the fixing sleeve 131 can slide in the sliding hole 112, and through the arrangement of the first limiting surface 1123 and the second limiting surface 1313, It is ensured that the fixing sleeve 131 will not slip off the above-mentioned sliding hole 112, and the reliability of use is ensured; and in this embodiment, the above-mentioned elastic member 133 is connected between the above-mentioned first limiting surface 1123 and the above-mentioned second limiting surface 1313, so that the installation structure is compact, and in this embodiment, the above-mentioned elastic member 133 is a spring sleeved on the above-mentioned first sliding portion 1311. In other embodiments, the elastic member 133 can also be set in other forms, such as an elastic ring sleeved on the above-mentioned first sliding portion 1311, or laid on the upper and lower sides of the sliding hole 112 ( Figure 5 When the fixing sleeve 131 moves, the elastic membrane is deformed. After use, the fixing sleeve 131 can be reset under the action of the elastic membrane. The present invention is not limited to this and will not be described in detail here.

[0041] Continue reading Figure 5 The hair bundle assembly 13 further includes a sealing ring 135 , and the sealing ring 135 is sleeved on the outer periphery of the fixing sleeve 131 .

[0042] It should be noted that, in the present embodiment, the sealing ring 135 is sleeved on the first hole section 1121 relative to the first sliding portion 1311, and a positioning groove 134 is provided at a corresponding position, and the sealing ring 135 is embedded in the positioning groove 134. Through the provision of the sealing ring 135, the interior can be effectively waterproofed, and in the present embodiment, the cross-section of the sealing ring 135 is circular, which is convenient for the fixing sleeve 131 to move in the sliding hole 112 and is conducive to the fixing sleeve 131 to move up and down ( Figure 5 The stability of the movement of the tooth surface (perspective) ensures the reliability of force transmission, thereby ensuring the stability and reliability of the force exerted by the bristle body 132 on the tooth surface, thereby ensuring the cleaning quality. In other embodiments, other methods or other forms of settings may be used, which will not be repeated here.

[0043] Please continue reading Figure 5 The brush head assembly 10 also has a reference plane (such as Figure 5 As shown in the middle surface α, the same below), the reference plane is perpendicular to the direction relative to the above-mentioned flexible body 12 and the above-mentioned hair bundle assembly 13; the above-mentioned hair bundle assembly 13 also includes a supporting pad 136, and the supporting pad 136 is arranged on the above-mentioned fixed sleeve 131 and the end of the above-mentioned hair bundle body 132 facing the above-mentioned flexible body 12, and the orthographic projection of the above-mentioned supporting pad 136 on the above-mentioned reference plane overlaps with the orthographic projection of the above-mentioned fixed sleeve 131 and the above-mentioned hair bundle body 132 on the above-mentioned reference plane.

[0044] It should be noted that such a configuration ensures that the supporting pad 136 supports the fixing sleeve 131 and the bristle body 132. The supporting pad 136 also supports the fixing sleeve 131 and the bristle body 132, which is beneficial to the stability of the force on the fixing sleeve 131 and the bristle body 132, thereby ensuring the stability of the movement of the bristle body 132, and is beneficial to improving the cleanliness of the teeth. In this embodiment, the supporting pad 136 is a cylindrical hard silicone pad, but is not limited to this.

[0045] See also Figure 6 The toothbrush cover 11 includes a base 113 and a mounting seat 14. The mounting seat 14 has the first accommodating cavity 111. The base 113 has a second accommodating cavity 1131 (such as Fig. 9 As shown), the mounting seat 14 is accommodated in the second accommodation cavity 1131.

[0046] It should be noted that the installation of the mounting base 14 can ensure the efficiency of toothbrush assembly. In some embodiments, the mounting base 14 includes a bottom cover 141 and a casing 142, and the bottom cover 141 and the casing 142 cooperate to enclose the first accommodating cavity 111. During actual assembly, the hair bundle assembly 13 is inserted into the sliding hole 112 of the casing 142, and the flexible body 12 is placed in the casing 142. Finally, the bottom cover 141 is sealed on the casing 142 (such as Figure 7 and Figure 8 As shown), the flexible body 12 is encapsulated between the bottom cover 141 and the casing 142, and then the assembled mounting seat 14 (including the flexible body 12 and the hair bundle assembly 13) is placed in the second accommodating cavity 1131 of the base 113 to realize the assembly of the toothbrush, and a layer of silicone pad can be arranged between the mounting seat 14 and the second accommodating cavity 1131, which is beneficial to reduce vibration and improve the user experience in the electric toothbrush. The specific installation can be fixedly connected by gluing, but is not limited to this; in addition, in some embodiments, the casing 142 is also provided with a mounting block 16, and the sliding hole 112 is arranged on the mounting block 16. Such an arrangement is convenient for processing and will not be repeated here.

[0047] Continue reading Figure 1 In one embodiment, the brush head assembly 10 further includes a connecting sleeve 15, which is plugged into the toothbrush sleeve 11, and the brush handle assembly is connected to the connecting sleeve 15, which will not be described in detail here.

[0048] The brush head assembly 10 is configured by setting a flexible body 12 in a first accommodating cavity 111 inside the toothbrush cover 11, and by squeezing the flexible body 12 through at least one group of bristle bundle components 13 under the action of external pressure, so that the flexible body 12 is deformed and exerts force on other bristle bundle components 13. The positions of different bristle bundle components 13 can be adaptively adjusted according to different teeth, so that the bristle bundle components 13 are fully fitted with the teeth and the force exerted on the teeth is equal, thereby improving the cleanliness of the teeth.

[0049] In the various embodiments of the present application, if there is no special explanation and logical conflict, the terms or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships. In the present application, "at least one" means one or more, and "more" means two or more.

[0050] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

[0051] The brush head assembly and toothbrush provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the brush head assembly of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A brush head assembly, characterized in that: The toothbrush cover (11) comprises a first accommodating cavity (111), a flexible body (12) and at least two groups of bristle bundle components (13); the toothbrush cover (11) has a first accommodating cavity (111) inside, and the toothbrush cover (11) is also provided with a sliding hole (112); the first accommodating cavity (111) is connected to the outside through the sliding hole (112); and the flexible body (12) is accommodated in the first accommodating cavity (111); Each of the hair bundle components (13) is movably inserted into the sliding hole (112), and at least one group of hair bundle components (13) moves toward the flexible body (12) under the action of external pressure to squeeze the flexible body (12), so that the flexible body (12) applies a force to the remaining hair bundle components (13), and the direction of the force is away from the flexible body (12).

2. The brush head assembly according to claim 1, characterized in that: The hair bundle component (13) comprises a fixing sleeve (131) and a hair bundle body (132); the fixing sleeve (131) is sleeved on the outer periphery of the hair bundle body (132); and the fixing sleeve (131) is movably inserted into the sliding hole (112).

3. The brush head assembly according to claim 2, characterized in that: The hair bundle assembly (13) further comprises an elastic member (133), the fixed sleeve (131) is connected to the toothbrush sleeve (11) via the elastic member (133), and the elastic member (133) is used to drive the fixed sleeve (131) to move toward the flexible body (12).

4. The brush head assembly according to claim 3, characterized in that: The brush head assembly (10) has a first direction (X), and the flexible body (12) and the hair bundle assembly (13) are arranged relative to each other along the first direction (X); The sliding hole (112) is divided into a first hole section (1121) and a second hole section (1122) along the first direction (X); the first hole section (1121) is farther away from the flexible body (12) than the second hole section (1122); the cross-sectional area of ​​the first hole section (1121) is smaller than the cross-sectional area of ​​the second hole section (1122), so that a first limiting surface (1123) is formed at the connection between the first hole section (1121) and the second hole section (1122); The outer side wall of the fixing sleeve (131) is divided into a first sliding connection portion (1311) and a second sliding connection portion (1312) along the first direction (X); the first sliding connection portion (1311) is farther away from the flexible body (12) than the second sliding connection portion (1312); the cross-sectional area of ​​the first sliding connection portion (1311) is smaller than the cross-sectional area of ​​the second sliding connection portion (1312), so that a second limiting surface (1313) is formed at the connection between the first sliding connection portion (1311) and the second sliding connection portion (1312); The elastic member (133) is connected between the first limiting surface (1123) and the second limiting surface (1313).

5. The brush head assembly according to claim 2, characterized in that: The hair bundle assembly (13) further comprises a sealing ring (135), wherein the sealing ring (135) is sleeved on the outer circumference of the fixing sleeve (131).

6. The brush head assembly according to claim 2, characterized in that: The brush head assembly (10) also has a reference plane (α), and the reference plane (α) is perpendicular to the direction in which the flexible body (12) and the hair bundle assembly (13) are relative to each other; The hair bundle assembly (13) further comprises a supporting pad (136), wherein the supporting pad (136) is arranged on the fixing sleeve (131) and the end of the hair bundle body (132) facing the flexible body (12), and the orthographic projection of the supporting pad (136) on the reference plane (α) overlaps with the orthographic projection of the fixing sleeve (131) on the reference plane (α) and the orthographic projection of the hair bundle body (132) on the reference plane (α).

7. The brush head assembly according to claim 1, characterized in that: The toothbrush cover (11) comprises a base (113) and a mounting seat (14); the mounting seat (14) has the first accommodating cavity (111); the base (113) has a second accommodating cavity (1131); and the mounting seat (14) is accommodated in the second accommodating cavity (1131).

8. The brush head assembly according to claim 7, characterized in that: The mounting seat (14) comprises a bottom cover (141) and a casing (142), and the bottom cover (141) and the casing (142) cooperate to enclose the first accommodating cavity (111).

9. The brush head assembly according to claim 1, characterized in that: It also comprises a connecting sleeve (15), wherein the connecting sleeve (15) is plugged into the toothbrush sleeve (11).

10. A toothbrush, characterized in that: The toothbrush comprises a brush head assembly as claimed in any one of claims 1 to 9, and further comprises a brush handle assembly, wherein the brush handle assembly is connected to the toothbrush cover (11).

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