Toothbrush

Abstract

The application discloses a toothbrush, and belongs to the technical field of oral cleaning products. The toothbrush comprises a first state and a second state, at least a first brush head in the first state and the second state is used for cleaning a conventional cleaning area of a tooth row, and only a second brush head in the second state is used for cleaning a conventional cleaning blind area of the toothbrush. Therefore, the toothbrush can clean different areas of the tooth in the different states, and the cleaning effect of all areas of the tooth is ensured. Further, since the first brush face and the second brush face are located on the same side of the rod body, the user can more conveniently switch the first state and the second state of the toothbrush during the cleaning process.

Description

Technical Field

[0001] This application relates to the field of oral hygiene products technology, and more specifically, to a toothbrush. Background Technology

[0002] A toothbrush is a handheld oral care tool used to clean teeth. It consists of a brush head and a handle, and cleans teeth by contacting the bristles with toothpaste.

[0003] Existing toothbrushes typically only have a single brush head with a large brushing surface at the end of the handle. This results in limited functionality, allowing toothbrushes to only clean certain areas of the teeth and failing to effectively clean all areas. This leaves cleaning blind spots where plaque can easily grow, affecting oral health. Summary of the Invention

[0004] The main objective of this application is to provide a toothbrush that solves the problem that existing toothbrushes only have a single brush head and cannot simultaneously clean both the regular cleaning areas and blind spots of the dental arch.

[0005] In a first aspect, this application provides a toothbrush, the toothbrush comprising:

[0006] Rod body; A first brush head and a second brush head, wherein the first brush head is connected to the rod body, and the area of ​​the first brush surface of the first brush head is greater than the area of ​​the second brush surface of the second brush head, and the first brush surface and the second brush surface are located on the same side of the rod body; The toothbrush has a first state and a second state; In the first state, at least the first brush surface is used for cleaning, between the first brush surface and the second brush surface. In the second state, only the second brush surface is used for cleaning.

[0007] Secondly, this application provides a toothbrush, the toothbrush comprising: Rod body; A first brush head is connected to the rod body. The first brush head includes a first bristle and a first brush head seat. The first bristle extends from one side of the first brush head seat along the thickness direction of the first brush head. The free end of the first bristle defines a first brush surface. The first brush head seat has a plane that is perpendicular to the thickness direction of the first brush head and passes through the first brush head seat. A second brush head is movable relative to a first brush head between a first position and a second position. The second brush head includes second bristles, the free ends of which define a second brush surface. The first brush surface and the second brush surface are located on the same side of the first brush head seat. The toothbrush includes a first state and a second state; In the first state, the second brush head is located in the first position, and the maximum height of the second brush surface from the plane does not exceed the maximum height of the first brush surface from the plane; In the second state, the second brush head is located in the second position, and at least a portion of the second brush surface is at a height greater than the maximum height of the first brush surface from the plane.

[0008] Thirdly, this application provides a toothbrush, the toothbrush comprising: Rod body; A first brush head is connected to the rod body. The first brush head includes a first bristle and a first brush head seat. The first bristle extends from one side of the first brush head seat along the thickness direction of the first brush head, and the free end of the first bristle defines a first brush surface. A second brush head is movable relative to a first brush head between a first position and a second position. The second brush head includes second bristles, the free ends of which define a second brush surface. The first brush surface and the second brush surface are located on the same side of the first brush head seat. The toothbrush includes a first state and a second state; In the first state, the second brush head is located in the first position, and the first brush surface and the second brush surface are flush, or the first brush surface at least partially protrudes from the second brush surface; In the second state, the second brush head is located in the second position, and the second brush surface at least partially protrudes from the first brush surface.

[0009] Fourthly, this application provides a toothbrush, the toothbrush comprising: Rod body; A first brush head and a second brush head, the first brush head being connected to the rod body, the second brush head being movable relative to the rod body between a first position and a second position, the protruding side of the first bristles of the first brush head and the protruding side of the second bristles of the second brush head both facing the same cleaning working side of the toothbrush. The toothbrush has a first state and a second state; In the first state, the second brush head is located in the first position, and at least the first brush head is used for cleaning; In the second state, the second brush head is located in the second position, and only the second brush head is used for cleaning.

[0010] The toothbrush of this application includes a first state and a second state. In the first state, at least the first brush head is used to clean the routine cleaning area of ​​the dentition. In the second state, only the second brush head is used to clean the blind spots in the routine cleaning area of ​​the dentition. Therefore, the toothbrush cleans different areas of the teeth in the above different states, ensuring a cleaning effect on all areas of the teeth. Furthermore, since the first brush surface and the second brush surface are located on the same side of the handle, the user can more conveniently switch between the first state and the second state of the toothbrush during the teeth cleaning process. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the toothbrush in one embodiment of the present application.

[0012] Figure 2 This is a schematic diagram of the toothbrush from another perspective in one embodiment of this application.

[0013] Figure 3 This is a schematic diagram of a first brush head and part of the rod in one embodiment of the present application.

[0014] Figure 4 This is a schematic diagram of the switching mechanism in one embodiment of this application.

[0015] Figure 5 This is a cross-sectional schematic diagram of the toothbrush in Embodiment 1 of this application, showing the toothbrush in a first state.

[0016] Figure 6 This is a cross-sectional schematic diagram of the toothbrush in Embodiment 1 of this application, showing the toothbrush in a second state.

[0017] Figure 7 This is a cross-sectional schematic diagram of the toothbrush in Embodiment 2 of this application, showing the toothbrush in a first state.

[0018] Figure 8 for Figure 7 A magnified view of a portion of point A in the middle.

[0019] Figure 9 This is a cross-sectional schematic diagram of the toothbrush in Embodiment 2 of this application, showing the toothbrush in a second state.

[0020] Figure 10 for Figure 9 A magnified view of a portion of point B in the middle.

[0021] Figure 11 This is a cross-sectional schematic diagram of the toothbrush in Embodiment 3 of this application, showing the toothbrush in a first state.

[0022] Figure 12This is a cross-sectional schematic diagram of the toothbrush in Embodiment 3 of this application, showing the toothbrush in a second state.

[0023] Figure 13 for Figure 12 A magnified view of a portion of point C.

[0024] The above figures include the following reference numerals: Toothbrush 100, handle 10, second sub-slot 11, first hole 12, first section 13, second section 14, third section 15, second sliding groove 16, first brush head 20, first bristles 21, first brush surface 211, first brush head base 22, first sub-slot 221, movement channel 222, first sliding groove 223, first bristle-embedded surface 224, first back side 225, first bristle-embedded hole 226, second brush head 30, second bristles 31, second brush surface 311, second brush head base 32, second... Embedded surface 321, second embedded hole 322, first inclined surface 321, switching mechanism 40, rotating shaft 41, rotating component 42, rotating rod 421, first rod portion 4211, second rod portion 4212, first operating part 422, elastic component 43, second operating part 44, sliding component 45, second inclined surface 451, third operating part 46, groove 50, slide 60, first slide section 61, second slide section 62, length direction L1, thickness direction L2, width direction L3, plane D. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0028] Please see Figure 1 , Figure 2 , Figure 7 , Figure 9 , Figure 11 and Figure 12 As shown, this application provides a toothbrush 100, which can be a manual toothbrush 100 or an electric toothbrush 100, without specific limitation. The toothbrush 100 includes a handle 10, a first brush head 20 and a second brush head 30. The first brush head 20 is connected to the handle 10, and the second brush head 30 is movably connected to the first brush head 20, or the second brush head 30 is movably connected to the handle 10.

[0029] The first brush head 20 is connected to the rod body 10, and the area of ​​the first brush surface 211 of the first brush head 20 is greater than the area of ​​the second brush surface 311 of the second brush head 30, and the first brush surface 211 and the second brush surface 311 are located on the same side of the rod body 10. The toothbrush 100 has a first state and a second state; in the first state, at least the first brush surface 211 is used for cleaning; in the second state, only the second brush surface 311 is used for cleaning.

[0030] In the embodiments of this application, in the first state, at least the first brush surface 211 is used to clean the routine cleaning area of ​​the dentition. That is, in the first state, only the first brush surface 211 can be used to clean the routine cleaning area of ​​the dentition, while the second brush surface 311 is not used. Alternatively, both the first brush surface 211 and the second brush surface 311 can be used simultaneously to clean the routine cleaning area of ​​the dentition. The routine cleaning area of ​​the dentition refers to the basic surface of the teeth that can be indiscriminately covered by a regular brush head during daily oral cleaning, including the main areas of the buccal, labial, lingual, palatal, and occlusal surfaces of the teeth, which are essential brushing areas for basic oral cleaning.

[0031] In the second state, only the second brush surface 311 is used to clean the blind spots of routine dental cleaning, while the first brush surface 211 is not used for cleaning. Blind spots in dental cleaning refer to hidden areas that cannot be effectively covered or deeply contacted by a regular brush head during daily oral hygiene. These are high-risk sites for oral caries and periodontal disease, including but not limited to interdental spaces, occlusal fissures, proximal surfaces and blind pockets of impacted / incompletely erupted wisdom teeth, gingival sulci, hidden depressions formed by tooth rotation, and marginal gaps of dental restorations.

[0032] Since the toothbrush 100 of this application includes a first brush head 20 and a second brush head 30, the toothbrush 100 can have a first state and a second state. In the first state, the toothbrush 100 cleans the routine cleaning area of ​​the dentition, and in the second state, the toothbrush 100 cleans the routine cleaning blind spots of the dentition. In the first state, the routine cleaning area of ​​the dentition can be cleaned only by the first brush surface 211 of the first brush head 20, or the routine cleaning area can be cleaned simultaneously by the first brush surface 211 of the first brush head 20 and the second brush surface 311 of the second brush head 30, thus increasing the cleaning area. In the second state, the routine cleaning blind spots of the dentition are cleaned only by the second brush surface 311 of the second brush head 30, thereby ensuring effective cleaning of these blind spots, such as interdental spaces, pits and fissures, wisdom teeth, and gaps between braces and teeth. Furthermore, since the area of ​​the second brush surface 311 of the second brush head 30 is smaller than the area of ​​the first brush surface 211 of the first brush head 20, the second brush head 30 can better clean the routine cleaning blind spots of the dentition. Furthermore, since the first brush surface 211 and the second brush surface 311 are located on the same side of the rod 10, the first state and the second state of the toothbrush 100 can be switched more conveniently during the teeth cleaning process.

[0033] Please see Figure 1 , Figure 2 , Figure 7 , Figure 9 , Figure 11 and Figure 12 As shown, this application provides a toothbrush 100, which includes a handle 10, a first brush head 20, and a second brush head 30. The first brush head 20 is connected to the handle 10, and the second brush head 30 is movable relative to the first brush head 20 between a first position and a second position, so that the toothbrush 100 can switch between a first state and a second state. The toothbrush 100 can be a manual toothbrush 100 or an electric toothbrush 100, and no specific limitation is made here.

[0034] The first brush head 20 includes first bristles 21 and a first brush head base 22. The first bristles 21 extend from one side of the first brush head base 22 along the thickness direction L2 of the first brush head 20. The free end of the first bristles 21 defines a first brush surface 211. The first brush head base 22 has a plane D, which is perpendicular to the thickness direction L2 of the first brush head 20 and passes through the first brush head base 22. The thickness direction of the first brush head base 22 is also the thickness direction L2 of the first brush head 20.

[0035] The second brush head 30 is movable relative to the first brush head 20 between a first position and a second position. The second brush head 30 includes second bristles 31, the free ends of which define a second brush surface 311. The first brush surface 211 and the second brush surface 311 are located on the same side of the first brush head base 22.

[0036] The toothbrush 100 includes a first state and a second state. In the first state, the second brush head 30 is located in the first position, and the maximum height of the second brush surface 311 from the plane D does not exceed the maximum height of the first brush surface 211 from the plane D. Therefore, in the first state, the second brush surface 311 does not protrude beyond the highest point of the first brush surface 211 relative to the plane D. The first brush surface 211 can be used to clean the routine cleaning area of ​​the dental arch, or the first brush surface 211 and the second brush surface 311 can be used together to clean the routine cleaning area of ​​the dental arch. Preferably, the height of the first brush surface 211 from the plane D is equal to the height of the second brush surface 311 from the plane D, that is, the first brush surface 211 and the second brush surface 311 are flush. Preferably, the height of the first brush surface 211 from the plane D is greater than the height of the second brush surface 311 from the plane D, that is, the first brush surface 211 completely protrudes beyond the second brush surface 311.

[0037] In the second state, the second brush head 30 is located in the second position, and at least a portion of the second brush surface 311 is at a height greater than the maximum height of the first brush surface 211 relative to the plane D. Therefore, in the second state, the second brush surface 311 protrudes at least partially from the highest point of the first brush surface 211 relative to the plane D. Thus, the second brush surface 311 can be used alone to clean the blind spots of routine dental cleaning. Preferably, the height of the second brush surface 311 from the plane D is greater than the height of the first brush surface 211 from the plane D, that is, the second brush surface 311 completely protrudes from the first brush surface 211.

[0038] Since the toothbrush 100 of this application includes a first brush head 20 and a second brush head 30, the toothbrush 100 can have a first state and a second state. In the first state, the toothbrush 100 cleans the routine cleaning area of ​​the dentition, and in the second state, the toothbrush 100 cleans the routine cleaning blind spots of the dentition. In the first state, the routine cleaning area of ​​the dentition can be cleaned only by the first brush surface 211 of the first brush head 20, or the routine cleaning area can be cleaned simultaneously by the first brush surface 211 of the first brush head 20 and the second brush surface 311 of the second brush head 30, thus increasing the cleaning area. In the second state, the routine cleaning blind spots of the dentition are cleaned only by the second brush surface 311 of the second brush head 30, thereby ensuring effective cleaning of these blind spots, such as interdental spaces, pits and fissures, wisdom teeth, and gaps between braces and teeth. Furthermore, since the area of ​​the second brush surface 311 of the second brush head 30 is smaller than the area of ​​the first brush surface 211 of the first brush head 20, the second brush head 30 can better clean the routine cleaning blind spots of the dentition. Furthermore, since the first brush surface 211 and the second brush surface 311 are located on the same side of the rod 10, the first state and the second state of the toothbrush 100 can be switched more conveniently during the teeth cleaning process.

[0039] Please see Figure 1 , Figure 2 , Figure 7 , Figure 9 , Figure 11 and Figure 12As shown, this application provides a toothbrush 100, which includes a handle 10, a first brush head 20, and a second brush head 30. The first brush head (20) is connected to the handle 10. The first brush head 20 includes first bristles 21 and a first brush head seat 22. The first bristles 21 extend from one side of the first brush head seat 22 along the thickness direction L2 of the first brush head 20, and the free end of the first bristles 21 defines a first brush surface 211. The first brush head seat 22 has a plane D, which is perpendicular to the thickness direction L2 of the first brush head 20 and passes through the first brush head seat 22. The thickness direction of the first brush head seat 22 is also the thickness direction L2 of the first brush head 20.

[0040] The second brush head 30 is movable relative to the first brush head 20 between a first position and a second position. The second brush head 30 includes second bristles 31, the free ends of which define a second brush surface 311. The first brush surface 211 and the second brush surface 311 are located on the same side of the first brush head base 22; in other words, the protruding sides of the first bristles 21 of the first brush head 20 and the protruding sides of the second bristles 31 of the second brush head 30 both face the same cleaning working side of the toothbrush 100. Here, the cleaning working side refers to the side of the toothbrush 100 used for cleaning teeth, for example... Figure 5 The left side of the toothbrush 100 shown.

[0041] The toothbrush 100 includes a first state and a second state. In the first state, the second brush head 30 is located in the first position, and the first brush surface 211 and the second brush surface 311 are flush, or the first brush surface 211 at least partially protrudes from the second brush surface 311. In other words, in the first state, the height of the second brush surface 311 from the plane D is equal to the height of the first brush surface 211 from the plane D, or at least partially, the height of the first brush surface 211 from the plane D is greater than the height of the second brush surface 311 from the plane D.

[0042] In the second state, the second brush head 30 is located in the second position, and the second brush surface 311 at least partially protrudes from the first brush surface 211. In other words, in the second state, at least a portion of the second brush surface 311 is at a greater height from the plane D than the first brush surface 211 is at a greater height from the plane D. Preferably, the height of the second brush surface 311 from the plane D is greater than the height of the first brush surface 211 from the plane D, that is, the second brush surface 311 completely protrudes from the first brush surface 211.

[0043] Please see Figure 1 , Figure 2 , Figure 7 , Figure 9 , Figure 11 and Figure 12 As shown, this application provides a toothbrush 100, which includes a handle 10, a first brush head 20, and a second brush head 30. The first brush head 20 is connected to the handle 10, and the second brush head 30 is movable relative to the handle 10 between a first position and a second position. The protruding sides of the first bristles 21 of the first brush head 20 and the protruding sides of the second bristles 31 of the second brush head 30 both face the same cleaning working side of the toothbrush 100. The toothbrush 100 can be a manual toothbrush 100 or an electric toothbrush 100, and no specific limitation is made here.

[0044] The toothbrush 100 has a first state and a second state; in the first state, the second brush head 30 is located in the first position, and at least the first brush head 20 is used to clean the routine cleaning area of ​​the dental arch.

[0045] In the second state, the second brush head 30 is located in the second position, and of the first brush head 20 and the second brush head 30, only the second brush head 30 is used to clean the blind spots of routine dental cleaning.

[0046] Since the toothbrush 100 of this application includes a first brush head 20 and a second brush head 30, the toothbrush 100 can have a first state and a second state. In the first state, the first brush head 20 cleans the regular cleaning area of ​​the dentition, or the first brush head 20 and the second brush head 30 clean the regular cleaning area of ​​the dentition, thus increasing the cleaning area. In the second state, the second brush head 30 cleans the regular cleaning blind spots of the dentition, thereby ensuring effective cleaning of these blind spots, such as interdental spaces, pits and fissures, wisdom teeth, and gaps between braces and teeth. Furthermore, since the protruding sides of the first bristles 21 and the protruding sides of the second bristles 31 of the second brush head 30 both face the same cleaning working side of the toothbrush 100, it is more convenient to switch between the first state and the second state of the toothbrush 100 during teeth cleaning.

[0047] Please see Figure 1 As shown in the embodiment of this application, the first brush head holder 22 includes a first bristle-planting surface 224. A first bristle-planting hole 226 is formed on one side of the first bristle-planting surface 224. The fixed end of the first bristle 21 is fixedly connected to the first bristle-planting hole 226, so that the first bristle 21 is fixedly connected to the first brush head holder 22. The first bristle-planting surface 224 can be a plane, inclined surface, curved surface, conical surface, or conical joint surface, etc., and is not specifically limited here.

[0048] The second brush head holder 32 includes a second bristle-planting surface 321. A second bristle-planting hole 322 is formed on one side of the second bristle-planting surface 321. The fixed end of the second bristle 31 is fixedly connected to the second bristle-planting hole 322, so that the second bristle 31 is fixedly connected to the second brush head holder 32. The second bristle-planting surface 321 can be a plane, inclined surface, curved surface, conical surface, conical surface, etc., and is not specifically limited here.

[0049] In embodiments of this application, the toothbrush 100 further includes a switching mechanism 40. The rod 10 serves as a handle 10, facilitating a user's grip for using the toothbrush 100.

[0050] The switching mechanism 40 is disposed on the handle 10 and can move relative to the handle 10. Therefore, by controlling the switching mechanism 40, the switching mechanism 40 can be used to switch between the first state and the second state.

[0051] Example 1 Please see Figure 1-6 As shown in the embodiment of this application, the switching mechanism 40 includes a rotating member 42, which is rotatably connected to the handle 10, and the second brush head 30 is disposed on the rotating member 42, so that the second brush head 30 can rotate relative to the handle 10 and the first brush head 20 together with the rotating member 42, thereby enabling the second brush head 30 to switch between the first position and the second position. Therefore, the rotating member 42 can rotate relative to the handle 10 to switch the toothbrush 100 between the first state and the second state.

[0052] In the embodiments of this application, the rotating member 42 includes a rotating rod 421 and a first operating part 422. The second brush head 30 and the first operating part 422 are respectively disposed at opposite ends of the rotating rod 421. That is to say, the first operating part 422, the rotating rod 421 and the second brush head 30 are arranged in sequence, and the first operating part 422 can control the rotating rod 421 to drive the second brush head 30 to move together, so that the second brush head 30 can switch between the first position and the second position.

[0053] Please see Figure 2-6 As shown, the first brush head 20 forms a motion channel 222, the second brush head 30 can move in the motion channel 222, and the motion channel 222 can limit the second brush head 30 so that the second brush head 30 can rotate stably in the motion channel 222.

[0054] The handle 10 forms a first hole 12, and the first operating part 422 can move within the first hole 12, thereby causing the first operating part 422 to move and drive the rotating rod 421 to rotate and drive the second brush head 30 to switch between the first position and the second position.

[0055] The rotating component 42 can rotate in the first rotation direction to switch the toothbrush 100 from the first state to the second state, so that the user can use only the second brush head 30 to clean the blind spots of the teeth in the regular cleaning process, thereby improving the teeth cleaning effect.

[0056] The rotating member 42 can rotate in a second rotation direction to switch the toothbrush 100 from the second state to the first state, thereby allowing the user to use only the first brush head 20 to clean the routine cleaning area of ​​the dentition, or to use both the first brush head and the second brush head 30 simultaneously to clean the routine cleaning area of ​​the dentition. The first rotation direction is opposite to the second rotation direction.

[0057] Please see Figure 1 , Figure 5 and Figure 6 As shown in the embodiment of this application, the second brush head 30 includes a second brush head seat 32, which is connected to the rotating rod 421, and the fixed end of the second bristles 31 is fixedly connected in the second bristle hole 322 of the second brush head seat 32.

[0058] The first brush head 20 includes a first brush head seat 22, which forms the motion channel 222, and the second brush head seat 32 can move in the motion channel 222.

[0059] The first brush head holder 22 also includes a first back surface 225, and the first bristle-planting surface 224 and the first back surface 225 are located on opposite sides of the first brush head holder 22.

[0060] In both the first and second states, the first operating part 422 is located inside the first hole 12, and the side of the first operating part 422 opposite to the first back surface 225 protrudes from the first hole 12, thereby facilitating user control of the first operating part 422, so that the first operating part 422 is forced to drive the rotating rod 421 to move along the first rotation direction, thereby causing the second brush head 30 to move from the first position to the second position.

[0061] In the first state, the second brush head seat 32 is located outside the motion channel 222 and is located on the side of the first brush head seat 22 close to the first back surface 225, so that the second brush surface 311 does not extend beyond the highest point of the first bristles 21, thereby allowing the user to clean the routine cleaning area of ​​the dental arch at least through the first brush surface 211.

[0062] In the second state, the second brush head seat 32 is located within the motion channel 222, or on the side of the first brush head seat 22 away from the first back surface 225, so that the second brush surface 311 extends at least partially beyond the highest point of the first brush surface 211, thereby allowing the user to clean the blind spots of routine dental cleaning through the second brush surface 311 of the second brush head 30.

[0063] Please see Figure 1 , Figure 5 and Figure 6 As shown in the embodiments of this application, the first brush head 20 includes a first brush head base 22, the first brush head base 22 includes a first bristle-planting surface 224 and a first back surface 225, the first bristle-planting surface 224 and the first back surface 225 are located on opposite sides of the first brush head base 22.

[0064] The first brush head holder 22 forms a movement channel 222, in which the second brush head 30 can move.

[0065] The first brush head seat 22 forms a first sub-groove 221 on the first back surface 225. The first sub-groove 221 extends along the length direction L1 of the handle 10. The motion channel 222 passes through the first brush head seat 22 along the thickness direction L2 of the first brush head 20, and the motion channel 222 connects to the end of the first sub-groove 221 away from the handle 10.

[0066] The handle 10 has a second sub-groove 11, which is connected between the first sub-groove 221 and the first hole 12. The second sub-groove 11 and the first sub-groove 221 are connected to form a groove 50. The first hole 12 passes through the handle 10 along the thickness direction L2 of the first brush head 20 so that the first operating part 422 can drive the rotating rod 421 to rotate.

[0067] The switching mechanism 40 also includes a rotating shaft 41. The rotating member 42 is hinged to the handle 10 via the rotating shaft 41. The rotating shaft 41 passes through the handle 10 along the width direction L3. The rotating shaft 41 passes through the second sub-slot 11 and is close to the first hole 12. Therefore, when the rotating rod 421 is rotated through the first operating part 422, it requires less effort and is easier for the customer to operate.

[0068] In the first state, the portion of the rotating rod 421 near the second brush head 30 is located outside the groove 50 such that the highest point of the second brush surface 311 does not exceed the highest point of the first brush surface 211.

[0069] In the second state, the rotating rod 421 is located within the groove 50 such that the second brush surface 311 at least partially exceeds the highest point of the first brush surface 211.

[0070] Please see Figure 1 As shown in the embodiments of this application, the handle 10 includes a first segment 13, a second segment 14, and a third segment 15 arranged sequentially. The first segment 13 has a rod-like structure and is used for gripping, the second segment 14 has a ring-like structure, the first hole 12 is formed in the second segment 14, and the third segment 15 has a rod-like structure, the second sub-groove 11 is formed in the third segment 15. Therefore, when the toothbrush 100 is gripped, the user's thumb can naturally be located at the first operating part 422, so that the user can switch between the first state and the second state during use, avoiding the need to remove the toothbrush 100 from the user's mouth to switch, thereby avoiding the phenomenon of toothpaste foam dripping or splashing (electric toothbrush) due to removing the toothbrush 100, and improving switching efficiency and user experience.

[0071] The diameter of the first segment 13 gradually decreases along the direction toward the second segment 14, and the diameter of the third segment 15 gradually decreases along the direction toward the first brush head 20. The maximum diameter of the third segment 15 is smaller than the minimum diameter of the first segment 13, and the maximum width of the second segment 14 along the width direction L3 of the handle 10 is greater than the minimum diameter of the first segment 13. This makes it easier for the user to hold the toothbrush 100 stably to clean teeth and switch between the first and second states.

[0072] In the embodiments of this application, in the second state, the second brush head 30 is located at the end of the first brush head 20 away from the handle 10 along the length direction L1 of the handle 10, and the motion channel 222 communicates with the first sub-groove 221. This arrangement facilitates the user to effectively clean areas such as wisdom teeth.

[0073] Please see Figure 5-6 As shown in the embodiment of this application, the rotating rod 421 includes a first rod portion 4211 and a second rod portion 4212 connected in sequence. The rotating shaft 41 passes through the connection between the first rod portion 4211 and the second rod portion 4212. The second brush head 30 is disposed on the first rod portion 4211 at one end away from the rotating shaft 41. The first operating part 422 is disposed on the second rod portion 4212 at one end away from the rotating shaft 41.

[0074] The length of the first rod 4211 is greater than the length of the second rod 4212, so that the rotating member 42 is a lever structure that saves effort, and the user can control the second brush head 30 to be held in the second position by applying only a relatively small force.

[0075] The included angle between the first rod portion 4211 and the second rod portion 4212 is an obtuse angle, or the first rod portion 4211 and the second rod portion 4212 are on the same straight line.

[0076] Example 2 Please see Figure 7-10 As shown in the embodiment of this application, the switching mechanism 40 includes a second operating part 44 and an elastic element 43. The elastic element 43 includes a first end and a second end opposite to each other. The first end is not fixedly connected to the second operating part 44, or the first end is fixedly connected to the second operating part 44. The second end is not fixedly connected to the second brush head seat 32. The elastic element 43 may be, but is not limited to, an elastic metal wire or a spring. Wherein, when the elastic element 43 is an elastic metal wire, its elasticity refers to its ability to elastically deform and elastically bend.

[0077] The second brush head 30 is slidably connected to the first brush head 20. The second brush head 30 can slide relative to the first brush head 20 along the thickness direction L2 of the first brush head 20 so that the second brush head 30 can switch between the first position and the second position.

[0078] When the second operating part 44 moves from the initial position and presses against the first end of the elastic member 43, the second end of the elastic member 43 pushes the second brush head 30 to move from the first position to the second position along the thickness direction L2 of the first brush head 20. The toothbrush 100 switches from the first state to the second state so that the user can clean the blind spots of the regular cleaning of the teeth only through the second brush head 30.

[0079] When the second operating part 44 is reset to the initial position, the second end of the elastic member 43 retracts to free up the travel space for the second brush head 30 to return from the second position to the first position. Therefore, when the second brush head 30 is subjected to a force along the second brush surface 311 toward the second brush head seat 32, the second brush head 30 will move from the second position to the first position, and the toothbrush 100 will switch from the second state to the first state.

[0080] Please see Figure 7-10 As shown in the embodiment of this application, the switching mechanism 40 includes a second operating part 44 and an elastic element 43. The elastic element 43 includes a first end and a second end opposite to each other. The second end of the elastic element 43 is fixedly connected to the second brush head 30, and the first end is fixedly connected to the second operating part 44. The elastic element 43 may be, but is not limited to, an elastic metal wire or a spring. When the elastic element 43 is an elastic metal wire, its elasticity refers to its ability to elastically deform and elastically bend.

[0081] The second brush head 30 is slidably connected to the first brush head 20. The second brush head 30 can slide relative to the first brush head 20 along the thickness direction L2 of the first brush head 20, so that the second brush head 30 can switch between the first position and the second position.

[0082] When the second operating part 44 moves from the initial position and presses against the first end of the elastic member 43, the second end of the elastic member 43 pushes the second brush head 30 to move from the first position to the second position along the thickness direction L2 of the first brush head 20. The toothbrush 100 switches from the first state to the second state so that the user can clean the blind spots of the regular cleaning of the teeth only through the second brush head 30. When the second operating part 44 is reset to the initial position, the second end of the elastic member 43 pulls the second brush head 30 from the second position to the first position, so that the toothbrush 100 switches from the second state to the first state, so that the user can clean the regular cleaning area of ​​the dental arch at least through the first brush head 20.

[0083] Please see Figure 7-10 As shown in the embodiments of this application, the first brush head 20 includes a first bristle-planting surface 224 and a first back surface 225, which are located on opposite sides of the first brush head 20.

[0084] A first groove 223 is formed on the first brush head 20; a second groove 16 is formed on the handle 10. The first groove 223 and the second groove 16 are connected by a slide 60. The slide 60 is formed along the length direction L1 of the handle 10. The slide 60 extends to the first brush head seat 22 of the first brush head 20. The slide 60 is connected to the first groove 223 and the second groove 16 respectively, and the first groove 223, the slide 60 and the second groove 16 are arranged sequentially.

[0085] The elastic element 43 is slidably disposed in the slide rail 60, and the second operating part 44 is slidably disposed in the second slide groove 16 and extends out of the second slide groove 16 in a direction away from the first back surface 225. This arrangement makes it convenient for the user to control the second operating part 44 with their thumb.

[0086] The second brush head 30 can slide in the first groove 223 along the thickness direction L2 of the first brush head 20, and the elastic member 43 is connected to the second brush head 30 and the second operating part 44 respectively, so that the second operating part 44, the elastic member 43 and the second brush head 30 can move synchronously.

[0087] When the second operating part 44 slides toward the first brush head 20 along the length direction L1 of the handle 10 or the second operating part 44 moves toward the handle 10 from the initial position, the second end of the elastic member 43 pushes the second brush head 30 to move from the first position to the second position along the thickness direction L2 of the first brush head 20. The toothbrush 100 switches from the first state to the second state, so that the blind spots of routine cleaning of the teeth can be cleaned only by the second brush head 30.

[0088] Example 3 Please see Figure 11-13 As shown in the embodiment of this application, the switching mechanism 40 includes a slider 45. The slider 45 is slidably connected to the handle 10, and the slider 45 can slide relative to the handle 10 along the length direction L1 of the handle 10, so that the slider 45 can push and pull the second brush head 30.

[0089] The second brush head 30 is slidably connected to the first brush head 20. The second brush head 30 can slide relative to the first brush head 20 along the thickness direction L2 of the first brush head 20, so that the second brush head 30 can switch between the first position and the second position.

[0090] When the slider 45 slides along the length direction L1 of the handle 10 and pushes the second brush head 30 to move from the first position to the second position along the thickness direction L2 of the first brush head 20, the toothbrush 100 switches from the first state to the second state so that the second brush head 30 can be used only to clean the blind spots of routine cleaning of the teeth.

[0091] When the slider 45 slides along the length direction L1 of the handle 10 and disengages from the second brush head 30, the slider 45 frees up the travel space required for the second brush head 30 to return from the second position to the first position. Therefore, when the second brush head 30 is subjected to a force along the second brush surface 311 toward the second brush head seat 32, the second brush head 30 will move from the second position to the first position, and the toothbrush 100 will switch from the second state to the first state.

[0092] Please see Figure 11-13 As shown in the embodiments of this application, the first brush head 20 includes a first bristle-planting surface 224 and a first back surface 225, which are located on opposite sides of the first brush head 20.

[0093] A first groove 223 is formed on the first brush head 20; a second groove 16 is formed on the handle 10. The first groove 223 and the second groove 16 are connected by a slide rail 60. Therefore, the first groove 223, the slide rail 60 and the second groove 16 are arranged in sequence.

[0094] The switching mechanism 40 further includes a third operating part 46, which is connected to the end of the slider 45 away from the first brush head 20. The slider 45 is slidably disposed in the slide rail 60 along the length direction L1 of the handle 10. The third operating part 46 is slidably disposed in the second slide groove 16 and extends out of the first slide groove 223 in a direction away from the first back surface 225. This arrangement makes it convenient for the user to control the second operating part 44 with their thumb.

[0095] The second brush head 30 is slidably disposed in the first groove 223 along the thickness direction L2 of the first brush head 20. The side of the second brush head 30 away from the second bristles 31 forms a first inclined surface 321. The end of the sliding member 45 near the first brush head 20 forms a second inclined surface 451. The second inclined surface 451 faces the first inclined surface 321 and is parallel to the first inclined surface 321. Therefore, the first inclined surface 321 and the second inclined surface 451 can be in surface contact to increase the contact area between the first inclined surface 321 and the second inclined surface 451.

[0096] When the third operating part 46 slides along the length direction L1 of the handle 10 toward the first brush head 20, the second inclined surface 451 abuts against the first inclined surface 321 and pushes the second brush head 30 along the thickness direction L2 of the first brush head 20 from the first position to the second position, thereby switching the toothbrush 100 from the first state to the second state. The distance from the first position to the first back surface 225 is less than the distance from the second position to the first back surface 225, so that the second brush surface 311 is at least partially higher than the highest point of the first brush surface 211, so that the blind spots of routine cleaning of the teeth can be cleaned only by the second brush surface 311.

[0097] When the third operating part 46 slides away from the first brush head 20 along the length direction L1 of the handle 10, the second inclined surface 451 disengages from the first inclined surface 321 and frees up the travel space required for the second brush head 30 to return to the first position. Therefore, when the second brush head 30 is subjected to a force along the second brush surface 311 toward the second brush head seat 32, the second brush head 30 will move from the second position to the first position, and the toothbrush 100 switches from the second state to the first state.

[0098] Please see Figure 1-13 As shown in the embodiments of this application, the area ratio of the second brush surface 311 to the area of ​​the first brush surface 211 is 1:8 to 1:4. This setting can ensure that the second brush surface 311 can effectively clean the blind spots of routine dental cleaning, and that the first brush surface 211 or the first brush surface 211 and the second brush surface 311 together can effectively and quickly clean the routine dental cleaning area.

[0099] In the embodiments of this application, the second brush surface 311 may be, but is not limited to, at least one of a plane, a cone, a truncated cone, and a curved surface.

[0100] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0101] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0102] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A toothbrush, characterized in that, include: Rod (10); A first brush head (20) and a second brush head (30), wherein the first brush head (20) is connected to the rod body (10), and the area of ​​the first brush surface (211) of the first brush head (20) is greater than the area of ​​the second brush surface (311) of the second brush head (30), and the first brush surface (211) and the second brush surface (311) are located on the same side of the rod body (10); The toothbrush (100) has a first state and a second state; In the first state, at least the first brush surface (211) is used for cleaning, of the first brush surface (211) and the second brush surface (311). In the second state, only the second brush surface (311) is used for cleaning, of the first brush surface (211) and the second brush surface (311).

2. A toothbrush, characterized in that, include: Rod (10); A first brush head (20) is connected to the rod body (10). The first brush head (20) includes a first bristle (21) and a first brush head seat (22). The first bristle (21) extends from one side of the first brush head seat (22) along the thickness direction (L2) of the first brush head (20). The free end of the first bristle (21) defines a first brush surface (211). The first brush head seat (22) has a plane (D) that is perpendicular to the thickness direction (L2) of the first brush head (20) and passes through the first brush head seat (22). A second brush head (30) is movable relative to the first brush head (20) between a first position and a second position. The second brush head (30) includes second bristles (31), the free ends of which define a second brush surface (311). The first brush surface (211) and the second brush surface (311) are located on the same side of the first brush head seat (22). The toothbrush (100) includes a first state and a second state; In the first state, the second brush head (30) is located in the first position, and the maximum height of the second brush surface (311) from the plane (D) does not exceed the maximum height of the first brush surface (211) from the plane (D); In the second state, the second brush head (30) is located in the second position, and at least a portion of the second brush surface (311) is at a height from the plane (D) greater than the maximum height of the first brush surface (211) from the plane (D).

3. A toothbrush, characterized in that, include: Rod (10); A first brush head (20) is connected to the rod body (10). The first brush head (20) includes a first bristle (21) and a first brush head seat (22). The first bristle (21) extends from one side of the first brush head seat (22) along the thickness direction (L2) of the first brush head (20). The free end of the first bristle (21) defines a first brush surface (211). A second brush head (30) is movable relative to the first brush head (20) between a first position and a second position. The second brush head (30) includes second bristles (31), the free ends of which define a second brush surface (311). The first brush surface (211) and the second brush surface (311) are located on the same side of the first brush head seat (22). The toothbrush (100) includes a first state and a second state; In the first state, the second brush head (30) is located in the first position, the first brush surface (211) and the second brush surface (311) are flush, or the first brush surface (211) at least partially protrudes from the second brush surface (311); In the second state, the second brush head (30) is located in the second position, and the second brush surface (311) protrudes at least partially from the first brush surface (211).

4. The toothbrush according to any one of claims 1-3, characterized in that, In the first state, at least the first brush surface (211) of the first brush surface (211) and the second brush surface (311) is used to clean the routine cleaning area of ​​the dental arch; In the second state, only the second brush surface (311) of the first brush surface (211) and the second brush surface (311) is used to clean the blind spots of routine dental cleaning.

5. A toothbrush, characterized in that, include: Rod (10); A first brush head (20) and a second brush head (30), the first brush head (20) being connected to the rod (10), the second brush head (30) being movable relative to the rod (10) between a first position and a second position, the protruding side of the first bristles (21) of the first brush head (20) and the protruding side of the second bristles (31) of the second brush head (30) both facing the same cleaning working side of the toothbrush (100); The toothbrush (100) has a first state and a second state; In the first state, the second brush head (30) is located in the first position, and at least the first brush head (20) is used for cleaning; In the second state, the second brush head (30) is located in the second position, and only the second brush head (30) of the first brush head (20) and the second brush head (30) is used for cleaning.

6. The toothbrush according to claim 5, characterized in that, In the first state, at least the first brush head (20) is used to clean the routine cleaning area of ​​the dental arch, of the first brush head (20) and the second brush head (30). In the second state, only the second brush head (30) of the first brush head (20) and the second brush head (30) is used to clean the blind spots of routine dental cleaning.

7. The toothbrush according to claim 1, 2, 3, 5, or 6, characterized in that, The toothbrush (100) further includes a switching mechanism (40), the rod (10) is a handle, the switching mechanism (40) is disposed on the handle (10) and can move relative to the handle (10), and the switching mechanism (40) is used to switch between the first state and the second state.

8. The toothbrush according to claim 7, characterized in that, The switching mechanism (40) includes a rotating member (42) rotatably connected to the handle (10), and the second brush head (30) is disposed on the rotating member (42). The rotating member (42) can rotate relative to the handle (10) to switch the toothbrush (100) between the first state and the second state.

9. The toothbrush according to claim 8, characterized in that, The rotating component (42) includes a rotating rod (421) and a first operating part (422), wherein the second brush head (30) and the first operating part (422) are respectively disposed at opposite ends of the rotating rod (421); The first brush head (20) forms a motion channel (222), and the second brush head (30) can move in the motion channel (222); The handle (10) forms a first hole (12), and the first operating part (422) can move within the first hole (12); The rotating member (42) can rotate in a first rotation direction to switch the toothbrush (100) from the first state to the second state; the rotating member (42) can rotate in a second rotation direction to switch the toothbrush (100) from the second state to the first state, wherein the first rotation direction is opposite to the second rotation direction.

10. The toothbrush according to claim 9, characterized in that, The second brush head (30) includes a second brush head seat (32), which is connected to the rotating rod (421); The first brush head (20) includes a first brush head seat (22), which forms the movement channel (222), and the second brush head seat (32) can move in the movement channel (222); The first brush head base (22) includes a first bristle-planting surface (224) and a first back surface (225), the first bristle-planting surface (224) and the first back surface (225) being located on opposite sides of the first brush head base (22); In both the first and second states, the first operating part (422) is located inside the first hole, and the first operating part (422) protrudes from the first hole (12) on the side opposite to the first back surface (225). In the first state, the second brush head seat (32) is located outside the motion channel (222), and the second brush head seat (32) is located on the side of the first brush head seat (22) close to the first back surface (225); In the second state, the second brush head seat (32) is located within the motion channel (222) or on the side of the first brush head seat (22) away from the first back surface (225).

11. The toothbrush according to claim 9, characterized in that, The first brush head (20) includes a first brush head seat (22), the first brush head seat (22) includes a first bristle-planting surface (224) and a first back surface (225), the first bristle-planting surface (224) and the first back surface (225) are located on opposite sides of the first brush head seat; The first brush head seat (22) forms the motion channel (222), and the second brush head (30) can move in the motion channel (222); The first brush head seat (22) forms a first sub-groove (221) on the first back surface (225). The first sub-groove (221) extends along the length direction (L1) of the handle (10). The motion channel (222) passes through the first brush head seat (22) along the thickness direction (L2) of the first brush head (20). The handle (10) has a second sub-groove (11), which is connected between the first sub-groove (221) and the first hole (12), and the second sub-groove (11) and the first sub-groove (221) are connected to form a groove (50), and the first hole (12) passes through the handle (10) along the thickness direction (L2) of the first brush head (20); The switching mechanism (40) further includes a rotating shaft (41), the rotating member (42) is hinged to the handle (10) through the rotating shaft (41), the rotating shaft (41) passes through the handle (10) along the width direction (L3), the rotating shaft (41) passes through the second sub-slot (11) and is close to the first hole (12); In the first state, the portion of the rotating rod (421) near the second brush head (30) is outside the groove (50); In the second state, the rotating rod (421) is located in the groove (50).

12. The toothbrush according to claim 11, characterized in that, The handle (10) includes a first section (13), a second section (14) and a third section (15) arranged in sequence. The first section (13) has a rod-shaped structure and is used for gripping. The second section (14) has a ring-shaped structure. The first hole (12) is formed in the second section (14). The third section (15) has a rod-shaped structure. The second sub-groove (11) is formed in the third section (15). The diameter of the first segment (13) gradually decreases along the direction toward the second segment (14), the diameter of the third segment (15) gradually decreases along the direction toward the first brush head (20), and the maximum diameter of the third segment (15) is smaller than the minimum diameter of the first segment (13), while the maximum width of the second segment (14) along the width direction (L3) of the handle is greater than the minimum diameter of the first segment (13).

13. The toothbrush according to claim 11, characterized in that, In the second state, the second brush head (30) is located at the end of the first brush head (20) away from the handle (10) along the length direction (L1) of the handle (10); The motion channel (222) is connected to the first sub-slot (221).

14. The toothbrush according to claim 11, characterized in that, The rotating rod (421) includes a first rod portion (4211) and a second rod portion (4212) connected in sequence. The rotating shaft (41) passes through the connection between the first rod portion (4211) and the second rod portion (4212). The second brush head (30) is disposed on the first rod portion (4211) at one end away from the rotating shaft (41). The first operating part (422) is disposed on the second rod portion (4212) at one end away from the rotating shaft (41). The length of the first rod (4211) is greater than the length of the second rod (4212).

15. The toothbrush according to claim 7, characterized in that, The switching mechanism (40) includes a second operating part (44) and an elastic element (43), the elastic element (43) including a first end and a second end opposite to each other; The second brush head (30) is slidably connected to the first brush head (20), and the second brush head (30) can slide relative to the first brush head (20) along the thickness direction (L2) of the first brush head (20); When the second operating part (44) moves from the initial position and presses against the first end of the elastic member (43), the second end of the elastic member (43) pushes the second brush head (30) to move from the first position to the second position along the thickness direction (L2) of the first brush head (20), and the toothbrush (100) switches from the first state to the second state. When the second operating part (44) is reset to the initial position, the second end of the elastic element (43) retracts to free up the travel space for the second brush head (30) to return from the second position to the first position.

16. The toothbrush according to claim 7, characterized in that, The switching mechanism (40) includes a second operating part (44) and an elastic element (43). The elastic element (43) includes a first end and a second end opposite to each other. The second end of the elastic element (43) is fixedly connected to the second brush head (30). The second brush head (30) is slidably connected to the first brush head (20), and the second brush head (30) can slide relative to the first brush head (20) along the thickness direction (L2) of the first brush head (20); When the second operating part (44) moves from the initial position and presses against the first end of the elastic member (43), the second end of the elastic member (43) pushes the second brush head (30) to move from the first position to the second position along the thickness direction (L2) of the first brush head (20), and the toothbrush (100) switches from the first state to the second state. When the second operating part (44) is reset to the initial position, the second end of the elastic element (43) pulls the second brush head (30) from the second position to the first position, and the toothbrush (100) switches from the second state to the first state.

17. The toothbrush according to claim 16, characterized in that, The first brush head (20) includes a first bristle-embedded surface (224) and a first back surface (225), the first bristle-embedded surface (224) and the first back surface (225) being located on opposite sides of the first brush head (20); A first groove (223) is formed on the first brush head (20); The handle (10) forms a second groove (16), and the first groove (223) and the second groove (16) are connected by a slide (60); The elastic element (43) is slidably disposed in the slide rail (60), and the second operating part (44) is slidably disposed in the second slide groove (16) and extends out of the second slide groove (16) in a direction away from the first back surface (225); The second brush head (30) can slide in the first groove (223) along the thickness direction (L2) of the first brush head (20), and the elastic member (43) is connected to the second brush head (30) and the second operating part (44) respectively; When the second operating part (44) slides toward the first brush head (20) along the length direction (L1) of the handle (10) or the second operating part (44) moves toward the handle (10) from the initial position, so that the second end of the elastic member (43) pushes the second brush head (30) to move from the first position to the second position along the thickness direction (L2) of the first brush head (20), the toothbrush (100) switches from the first state to the second state.

18. The toothbrush according to claim 17, characterized in that, The slide (60) includes a first slide section (61) and a second slide section (62) connected to each other. The first slide section (61) is connected to the first slide groove (223) and the second slide section (62) respectively. The second slide section (62) is connected to the first slide section (61) and the second slide groove (16) respectively. The first slide section (61) is arc-shaped. As the elastic element (43) moves from the second slide section (62) through the first slide section (61) into the first slide groove (223), the elastic element (43) will move along the length direction (L1) of the handle (10) and eventually switch to move along the thickness direction (L2) of the first brush head (20). As the elastic element (43) moves from the first slide groove (223) through the first slide section (61) into the second slide section (62), the elastic element (43) will move along the thickness direction (L2) of the first brush head (20) and eventually switch to moving along the length direction (L1) of the handle (10).

19. The toothbrush according to claim 7, characterized in that, The switching mechanism (40) includes a slider (45), which is slidably connected to the handle (10). The slider (45) can slide relative to the handle (10) along the length direction (L1) of the handle (10). The second brush head (30) is slidably connected to the first brush head (20), and the second brush head (30) can slide relative to the first brush head (20) along the thickness direction (L2) of the first brush head (20); When the slider (45) slides along the length direction (L1) of the handle (10) and pushes the second brush head (30) to move from the first position to the second position along the thickness direction (L2) of the first brush head (20), the toothbrush (100) switches from the first state to the second state. When the slider (45) slides along the length direction (L1) of the handle (10) and disengages from the second brush head (30), the slider (45) frees up the travel space required for the second brush head (30) to return from the second position to the first position.

20. The toothbrush according to claim 19, characterized in that, The first brush head (20) includes a first bristle-embedded surface (224) and a first back surface (225), the first bristle-embedded surface (224) and the first back surface (225) being located on opposite sides of the first brush head (20); A first groove (223) is formed on the first brush head (20); The handle (10) forms a second groove (16), and the first groove (223) and the second groove (16) are connected by a slide rail (60); The switching mechanism (40) further includes a third operating part (46), which is connected to the end of the slider (45) away from the first brush head (20). The slider (45) is slidably disposed in the slide rail (60) along the length direction (L1) of the handle (10). The third operating part (46) is slidably disposed in the second slide groove (16) and extends out of the first slide groove (223) in a direction away from the first back surface (225). The second brush head (30) is slidably disposed in the first groove (223) along the thickness direction (L2) of the first brush head (20). The side of the second brush head (30) away from the second bristles (31) forms a first inclined surface (321). The sliding member (45) forms a second inclined surface (451) at one end near the first brush head (20). The second inclined surface (451) faces the first inclined surface (321) and is parallel to the first inclined surface (321). When the third operating part (46) slides along the length direction (L1) of the handle (10) toward the first brush head (20), the second inclined surface (451) abuts against the first inclined surface (321) and pushes the second brush head (30) to move from the first position to the second position along the thickness direction (L2) of the first brush head (20), thereby switching the toothbrush (100) from the first state to the second state. The distance from the first position to the first back surface (225) is less than the distance from the second position to the first back surface (225). When the third operating part (46) slides away from the first brush head (20) along the length direction (L1) of the handle (10), the second inclined surface (451) disengages from the first inclined surface (321) and frees up the travel space required for the second brush head (30) to return to the first position.

21. The toothbrush according to claim 1, 2, 3, 5, or 6, characterized in that, The area ratio of the second brush surface (311) to the area of ​​the first brush surface (211) is 1:8 to 1:4; And / or, the second brush surface (311) is at least one of a plane, a cone, a truncated cone, and a curved surface.

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