Brush head and electric toothbrush

Abstract

A brush head and an electric toothbrush. The brush head is configured to be mounted on a toothbrush body (9) and comprises a brush head body (1), a cleaning portion (2) and a transmission portion (3), wherein the cleaning portion (2) comprises a first brush head (21) and a second brush head (22), the second brush head (22) being configured to be pivotable; the transmission portion (3) comprises a first transmission member (31) and a second transmission member (32), which are connected to each other by means of a connecting member (4); and in the extension direction of the first axis, with the connecting member (4) as the boundary, one end of the second transmission member (32) is configured to fit with a corresponding limiting portion on the toothbrush body (9), and the other end thereof is configured to eccentrically fit with the second brush head (22). The electric toothbrush comprises a toothbrush body (9), a power shaft (8) and a brush head, wherein the brush head is configured to connect to the toothbrush body (9) by means of the power shaft (8), the power shaft (8) is configured as an external vibration source of the brush head, and the cleaning portion (2) of the brush head is configured to vibrate relative to the toothbrush body (9). The brush head and the electric toothbrush can achieve multi-modal composite motion of reciprocating vibration and reciprocating rotation to enhance the ability to clean the interdental spaces and the roots.

Description

A brush head and an electric toothbrush

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024224174019, filed on September 29, 2024, entitled “A Brush Head and an Electric Toothbrush”. The entire contents of this Chinese Patent Application are incorporated by reference into this application. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of cleaning tools, and more particularly, the present disclosure relates to a brush head and an electric toothbrush. BACKGROUND

[0004] Maintaining oral hygiene, particularly cleaning teeth regularly and effectively, is the basis for protecting oral and overall health. This behavior is crucial for preventing the accumulation of dental plaque, which, if not removed in time, will gradually calcify into calculus, the edge of which will continuously irritate the gums, causing inflammatory reactions, starting with gingivitis and possibly worsening into periodontitis. Periodontal disease not only affects the stability of the teeth, and in severe cases can lead to tooth loss, but is also associated with various systemic diseases. Therefore, taking the correct and regular dental cleaning measures is a key step in safeguarding oral and overall health.

[0005] Existing toothbrush technology is mostly limited to two-dimensional motion patterns, such as high-frequency sonic vibration, reciprocating rotation, or reciprocating rotation combined with up-and-down tilting of the bristles, all of which focus on cleaning actions in the plane dimension. However, with only a single type of motion pattern, the effectiveness of the toothbrush in achieving comprehensive oral cleaning is limited. SUMMARY

[0006] In view of the above, the embodiments of the present disclosure provide a brush head and an electric toothbrush to solve the technical defects existing in the prior art.

[0007] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:

[0008] In a first aspect of the present disclosure, the present disclosure provides a brush head configured to be mounted on a machine body, comprising:

[0009] a brush head body configured to extend along a first axis, comprising a side wall defining an open cavity;

[0010] a cleaning portion attached to one end of the brush head body, the cleaning portion comprising a first brush head and a second brush head, the second brush head being configured to be pivotable;

[0011] a transmission portion at least partially disposed in the cavity, comprising a first transmission member and a second transmission member, wherein:

[0012] The first transmission member and the second transmission member are connected by a connecting member, and extend along the first axis direction, and one end of the second transmission member is configured to cooperate with a limiting part corresponding to the machine body, and the other end is configured to cooperate with the second brush head eccentrically; when the first transmission member is driven by an external vibration source, the first transmission member drives one end of the second transmission member to swing, and the second transmission member swings the other end of the second transmission member along the opposite direction as the pivot point of the connecting member.

[0013] In one embodiment of the present disclosure, one end of the second transmission member is limited by the limiting part, and the other end swings along the opposite direction as the pivot point of the connecting member, driving the second brush head to rotate.

[0014] In one embodiment of the present disclosure, the end of the first transmission member is provided with a groove, and the second transmission member is provided with a cooperating part configured to cooperate with the groove to form the connecting member.

[0015] In one embodiment of the present disclosure, when the first transmission member is driven by the external vibration source, the first transmission member reciprocally rotates around the first axis as the rotation center, and drives one end of the second transmission member to reciprocally swing;

[0016] When one end of the second transmission member reciprocally swings, the other end swings along the opposite direction as the pivot point of the connecting member, driving the second brush head to reciprocally rotate.

[0017] In one embodiment of the present disclosure, the limiting part has a limiting area, and one end of the second transmission member has a limiting segment, and the limiting area is configured to cooperate with the limiting segment.

[0018] In one embodiment of the present disclosure, the limiting area limits the movement of the limiting segment, and the other end of the second transmission member is relatively displaced along the first axis direction relative to the connecting member.

[0019] In one embodiment of the present disclosure, along the first axis direction, the connecting member is located between the other end of the second transmission member and the limiting part.

[0020] In one embodiment of the present disclosure, along the first axis direction, the connecting member is located between one end and the other end of the second transmission member.

[0021] In one embodiment of the present disclosure, the cleaning part further comprises an assembly part, and the first brush head and the second brush head are arranged on the assembly part, and the assembly part is attached to one end of the brush head body.

[0022] In one embodiment of the present disclosure, the second brush head has opposite first and second sides, the first side extending with bristles;

[0023] The second side is formed with a pivot member, which is pivotably connected with the assembly member.

[0024] In one embodiment of the present disclosure, the other end of the second transmission member is formed with a driving member eccentrically connected with the second brush head, the second side is correspondingly formed with an engaging member offset from the side center position, the driving member is connected with the engaging member, when one end of the second transmission member swings, the second transmission member swings around the connecting member as a fulcrum, and drives the driving member to rotate the second brush head.

[0025] In one embodiment of the present disclosure, the driving member is an open slot member, and the engaging member is a cylindrical member, the diameter of the open slot member is greater than the diameter of the cylindrical member.

[0026] In one embodiment of the present disclosure, the first transmission member is connected with the brush head body along the extension direction of the first axis, when the external vibration source drives the first transmission member, the first transmission member drives the brush head body to reciprocally vibrate the first brush head and the second brush head.

[0027] In one embodiment of the present disclosure, the assembly member is provided with a limiting groove, one end of the second transmission member is connected with the first transmission member, and the other end is accommodated in the limiting groove, when the external vibration source drives the first transmission member, the first transmission member drives one end of the second transmission member to reciprocally swing, and the other end of the second transmission member reciprocally swings in the opposite direction to drive the second brush head to reciprocally rotate.

[0028] In a second aspect of the present disclosure, an electric toothbrush is provided, comprising:

[0029] A machine body configured for holding;

[0030] A power shaft mounted on the machine body;

[0031] According to the brush head as described above, the brush head is configured to be connected with the machine body through the power shaft, the power shaft is configured as an external vibration source of the brush head, and the cleaning part of the brush head is configured to vibrate relative to the machine body.

[0032] In one embodiment of the present disclosure, the limiting part is a limiting area provided on the machine body, the limiting area is configured to extend along the circumferential direction of the machine body, and the limiting segment of the second transmission member is configured to extend into the limiting area.

[0033] The brush head and the electric toothbrush provided by the present disclosure can realize multi-modal composite motion of reciprocating vibration and reciprocating rotation, and enhance the cleaning ability of the interdental gap and the tooth root.

[0034] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0035] FIG. 1 is a schematic view of a specific structure of a brush head according to an embodiment of the present disclosure;

[0036] FIG. 2 is a schematic view of an exploded structure of a brush head according to an embodiment of the present disclosure;

[0037] FIG. 3 is a schematic view of a partial structure of a brush head according to an embodiment of the present disclosure;

[0038] FIG. 4 is a front view of a brush head according to an embodiment of the present disclosure;

[0039] FIG. 5 is a bottom view of a brush head according to an embodiment of the present disclosure;

[0040] FIG. 6 is a top view of a brush head according to an embodiment of the present disclosure;

[0041] FIG. 7 is a right view of a brush head according to an embodiment of the present disclosure;

[0042] FIG. 8 is a left view of a brush head according to an embodiment of the present disclosure;

[0043] FIG. 9 is a schematic view of a motion state of a brush head according to an embodiment of the present disclosure;

[0044] FIG. 10 is a schematic view of a motion state of a brush head according to an embodiment of the present disclosure;

[0045] FIG. 11 is a schematic view of a motion state of a brush head according to an embodiment of the present disclosure;

[0046] FIG. 12 is a schematic view of an exploded structure of an electric toothbrush according to an embodiment of the present disclosure.

[0047] 1 - brush head body; 2 - cleaning part; 21 - first brush head; 22 - second brush head; 221 - brush wire; 222 - pivot; 23 - assembly part; 231 - limiting groove; 3 - transmission part; 31 - first transmission part; 32 - second transmission part; 321 - limiting section; 4 - connecting part; 41 - groove; 42 - matching part; 5 - limiting area; 6 - driving part; 7 - joint part; 8 - power shaft; 9 - machine body. DETAILED DESCRIPTION

[0048] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement of the components and steps set forth in these embodiments, numerical expressions, and numerical values are not limiting to the scope of the present disclosure unless specifically stated otherwise.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the scope of the disclosure, its application, or uses.

[0050] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the description if appropriate.

[0051] Note that similar reference numerals and letters indicate similar items throughout the drawings, and thus once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0052] The specific embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0053] In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used to describe relative positions between the relevant parts, and do not limit the absolute positions of the relevant parts.

[0054] In this document, "first", "second", and the like are used only to distinguish between each other, and do not indicate importance and order, and are not a prerequisite for each other.

[0055] In this document, "equal", "same", and the like are not strictly limited in the mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and allowed in manufacturing or use.

[0056] The present disclosure provides a brush head and an electric toothbrush, wherein the brush head is configured to be mounted on a machine body, comprising a brush head body, a cleaning part, and a transmission part, the cleaning part comprises a first brush head and a second brush head, the second brush head is configured to be pivotable; the transmission part comprises a first transmission member and a second transmission member, the first transmission member and the second transmission member are connected by a connecting member, and extend along a first axis direction, the second transmission member is configured to be matched with a limiting part corresponding to the machine body at one end, and is configured to be eccentrically matched with the second brush head at the other end; the electric toothbrush comprises a machine body, a power shaft, and the brush head, the brush head is configured to be connected with the machine body through the power shaft, the power shaft is configured as an external vibration source of the brush head, and the cleaning part of the brush head is configured to vibrate relative to the machine body.

[0057] The brush head and the electric toothbrush provided by the present disclosure can realize a multi-modal composite motion of reciprocating vibration and reciprocating rotation, and enhance the cleaning ability of the interdental crevice and the tooth root.

[0058] For the convenience of understanding, the specific structure of the brush head and the electric toothbrush of the present disclosure and the working principle thereof will be described in detail below with reference to Figures 1 to 12 in combination with the embodiments.

[0059] As shown in Figure 1, in the first aspect of the present disclosure, the present disclosure provides a brush head configured to be mounted on a body 9, the brush head comprising a brush head body 1, a cleaning part 2 and a transmission part 3. The brush head body 1 is configured to extend along a first axis and comprises a side wall defining an open cavity. The cleaning part 2 is attached to one end of the brush head body 1 and comprises a first brush head 21 and a second brush head 22, the second brush head 22 being configured to be pivotable. The transmission part 3 is at least partially disposed in the cavity and comprises a first transmission member 31 and a second transmission member 32. The first transmission member 31 and the second transmission member 32 are connected by a connecting member 4 and extend along the first axis. The second transmission member 32 is configured to be in eccentric engagement with the second brush head 22 at one end thereof and to be in engagement with a limiting part provided on the body 9 at the other end thereof, with the connecting member 4 being a boundary. When the first transmission member 31 is driven by an external vibration source, the first transmission member 31 drives the one end of the second transmission member 32 to oscillate, and the second transmission member 32 is pivoted at the connecting member 4, so that the other end of the second transmission member 32 drives the second brush head 22 to rotate.

[0060] Specifically, in the present embodiment, the brush head is mounted on the body 9 and mainly consists of three parts, i.e., the brush head body 1, the cleaning part 2 and the transmission part 3. The brush head body 1 is a housing extending along a first axis and comprises a side wall defining an open cavity. The cleaning part 2 is attached to one end of the brush head body 1 and is used for cleaning teeth. The cleaning part 2 comprises a first brush head 21 and a second brush head 22, wherein the second brush head 22 is a pivotable structure. The transmission part 3 is disposed in the inner cavity of the brush head body 1 and comprises a first transmission member 31 and a second transmission member 32. The first transmission member 31 and the second transmission member 32 are connected by a connecting member 4, which not only serves as a connecting structure of the first transmission member 31 and the second transmission member 32, but also serves as a movement fulcrum of the second transmission member 32. In the extension direction along the first axis, the one end of the second transmission member 32 is in engagement with a limiting part provided on the body 9, and the other end thereof is in eccentric engagement with the second brush head 22, with the connecting member 4 being a boundary. When the first transmission member 31 is driven by an external vibration source, the first transmission member 31 drives the one end of the second transmission member 32 to oscillate, and the second transmission member 32 is pivoted at the connecting member 4, so that the other end of the second transmission member 32 drives the second brush head 22 to rotate, thereby achieving a compound motion mode of reciprocating vibration and rotary motion of the brush head, and thus achieving comprehensive and deep cleaning of teeth.

[0061] As shown in Figures 9 to 11, in one embodiment of the present disclosure, the one end of the second transmission member 32 is limited in movement by the limiting part, and the other end thereof is pivoted at the connecting member 4 to oscillate in the opposite direction, thereby driving the second brush head 22 to rotate.

[0062] Specifically, the limiting portion arranged on the body 9 limits part of the movement of the second transmission member 32, ensuring that the second transmission member 32 moves in a predetermined manner within a predetermined range. When the first transmission member 31 is driven by an external vibration source, the first transmission member 31 drives the second transmission member 32 to swing. Since one end of the second transmission member 32 is limited in part by the limiting portion, the second transmission member 32 cannot completely follow the movement track of the first transmission member 31, and thus, with the connecting member 4 as a fulcrum, the other end of the second transmission member 32 swings in the opposite direction. The other end of the second transmission member 32 is eccentrically matched with the second brush head 22, so that the swing of the second transmission member 32 drives the second brush head 22 to realize rotational movement around itself. Through the arrangement of the limiting portion and the eccentric matching of the second transmission member 32 and the second brush head 22, the conversion from linear motion to rotational motion is realized, the cleaning efficiency is improved, and different users' oral cavities and cleaning needs are better adapted.

[0063] As shown in FIGS. 1-2, in one embodiment of the present disclosure, the end of the first transmission member 31 is provided with a groove 41, and the second transmission member 32 is provided with a matching portion 42, which is configured to cooperate with the groove 41 to form the connecting member 4.

[0064] Specifically, the end of the first transmission member 31 is provided with a groove 41, and the second transmission member 32 is provided with a matching portion 42, and the shapes of the groove 41 and the matching portion 42 can be matched with each other to form the connecting member 4. In this embodiment, the groove 41 is designed as a ring-shaped groove 41, and the matching portion 42 is designed as a cylindrical matching portion 42. The design of the ring-shaped groove 41 provides sufficient contact area to ensure stable connection between the first transmission member 31 and the second transmission member 32. The cylindrical matching portion 42 is inserted into the ring-shaped groove 41 to form the connecting member 4. The first transmission member 31 and the second transmission member 32 are connected through the connecting member 4. Since the inner diameter of the ring-shaped groove 41 is slightly larger than the radius of the cylindrical matching portion 42, this close size matching ensures the relative stable connection between the first transmission member 31 and the second transmission member 32, avoiding loosening or disengagement during use. Moreover, since the inner diameter of the ring-shaped groove 41 is slightly larger than the radius of the cylindrical matching portion 42, the second transmission member 32 can swing freely within a certain range without being limited by the connecting member 4, ensuring that the second transmission member 32 can effectively convert the movement of the first transmission member 31 into swing movement of the second transmission member 32.

[0065] When the first transmission member 31 is driven by an external vibration source, the second transmission member 32 connected thereto is driven to move. Due to the close fit between the annular groove 41 and the cylindrical fitting portion 42, the movement of the first transmission member 31 can be smoothly transmitted to the second transmission member 32. Although there is a certain gap, sufficient power transmission efficiency is still ensured. The second brush head 22 can effectively rotate with the oscillation of the second transmission member 32, thereby improving the cleaning effect.

[0066] As shown in FIG. 1, FIG. 9 to FIG. 11, in one embodiment of the present disclosure, when the first transmission member 31 is driven by an external vibration source, it rotates back and forth around the first axis as the center of rotation, and drives one end of the second transmission member 32 to oscillate back and forth; when one end of the second transmission member 32 oscillates back and forth, it makes the other end oscillate back and forth in the opposite direction around the connecting member 4 as the fulcrum, and drives the second brush head 22 to rotate back and forth.

[0067] Specifically, when the first transmission member 31 is driven by an external vibration source, it performs forward and reverse rotational movement around the first axis. Here, forward and reverse refer to clockwise and counterclockwise rotational movement along the first axis. One end of the second transmission member 32 is connected to the first transmission member 31 through the connecting member 4. When the first transmission member 31 rotates back and forth, it will drive one end of the second transmission member 32 to oscillate back and forth. Since one end of the second transmission member 32 is matched with the limiting portion provided on the body 9, the limiting portion will limit the oscillation amplitude of the second transmission member 32, so that it can only oscillate within a certain range, ensuring that the movement trajectory of the second transmission member 32 meets the expectations, and increasing the stability of the system.

[0068] When one end of the second transmission member 32 is driven by the first transmission member 31 to oscillate back and forth, due to the connecting member 4 as the oscillation fulcrum, the second transmission member 32 will move around the connecting member 4 as the fulcrum, that is, the other end of the second transmission member 32 will oscillate back and forth in the opposite direction to maintain balance. The other end of the second transmission member 32 is eccentrically matched with the second brush head 22, which means that the oscillation of the second transmission member 32 will drive the second brush head 22 to rotate back and forth, so that the second brush head 22 can perform efficient rotational movement within a smaller range, thereby achieving effective cleaning of the teeth. Through such a transmission mechanism, the cleaning part 2 and the transmission part 3 of the brush head work together, so that the brush head can more effectively cover all areas that need to be cleaned when cleaning teeth, not only improving the cleaning efficiency, but also enhancing the reliability and durability of the system.

[0069] As shown in FIG. 3, in one embodiment of the present disclosure, the limiting portion has a limiting area 5, and one end of the second transmission member 32 has a limiting segment 321, and the limiting area 5 is configured to cooperate with the limiting segment 321.

[0070] Specifically, the limiting portion is provided with a limiting area 5, and the second transmission member 32 is provided with a limiting section 321 matched with the limiting area 5. The limiting portion is arranged on the machine body 9. In this embodiment, the limiting area 5 is shaped as a notch, and the notch is shaped to match the limiting section 321, so as to match the limiting section 321 on the second transmission member 32. The limiting section 321 enables the second transmission member 32 to match the limiting area 5 of the limiting portion when swinging, so as to limit the movement range and prevent excessive swinging or falling out. When one end of the second transmission member 32 starts to swing, the limiting section 321 will contact the limiting area 5 of the limiting portion, so that the second transmission member 32 swings under the control of the limiting portion. Due to the presence of the connecting member 4, the other end of the second transmission member 32 will rotate around the connecting member 4 as the fulcrum. When one end of the second transmission member 32 reciprocally swings, the other end swings in the opposite direction. This is because when one end is limited by the limiting portion, the other end must rotate to keep the system balanced. Through the design of the limiting portion and the limiting section 321, the entire transmission system realizes effective control of the movement of the second transmission member 32, ensuring that the second brush head 22 can reciprocally rotate within a predetermined range, thereby improving the cleaning efficiency.

[0071] As shown in FIGS. 1-3, in one embodiment of the present disclosure, when the first transmission member 31 is driven by an external vibration source, it reciprocally rotates around the first axis as the rotation center. The limiting area 5 limits the movement of the limiting section 321, so that the other end of the second transmission member 32 is relatively displaced along the extension direction of the first axis relative to the connecting member 4.

[0072] Specifically, when the first transmission member 31 is driven by an external vibration source, the first transmission member 31 rotates back and forth within a certain angle around the first axis. The reciprocating rotation of the first transmission member 31 drives one end of the second transmission member 32 to swing. Since the other end of the second transmission member 32 matches the limiting area 5 of the limiting portion, the limiting area 5 limits the movement of the second transmission member 32. The limiting area 5 of the limiting portion limits the swing amplitude of the second transmission member 32, so that one end of the second transmission member 32 can only swing within a certain range. At the same time, the other end of the second transmission member 32 will produce relative displacement along the direction of the first axis due to the matching of the limiting section 321 and the limiting area 5.

[0073] As shown in FIG. 1, in one embodiment of the present disclosure, along the extension direction of the first axis, the connecting member 4 is located between the other end of the second transmission member 32 and the limiting portion.

[0074] Specifically, the connecting piece 4 is located between the other end of the second transmission member 32 and the limiting part, when one end of the second transmission member 32 is driven to swing by the first transmission member 31, the other end cannot swing together due to the limitation of the limiting part, but generates displacement along the first axis direction. The connecting piece 4 acts as a fulcrum, so that the other end of the second transmission member 32 can displace relative to the connecting piece 4. It ensures that the other end of the second transmission member 32 can be supported when swinging, thereby enhancing the overall stability and reliability of the system. The position of the connecting piece 4 makes the other end of the second transmission member 32 not unstable when moving without a fulcrum, ensuring that the second brush head 22 can rotate smoothly during use.

[0075] As shown in FIG. 1, in one embodiment of the present disclosure, along the extension direction of the first axis, the connecting piece 4 is located between one end and the other end of the second transmission member 32.

[0076] Specifically, the connecting piece 4 is arranged between one end and the other end of the second transmission member 32, i.e. at the middle position of the second transmission member 32. The connecting piece 4 is located at the middle position of the second transmission member 32, which acts as a fulcrum, so that the movement of both ends of the second transmission member 32 can be more balanced. When the first transmission member 31 drives one end of the second transmission member 32 to swing back and forth, the other end will also swing or displace accordingly due to the connecting piece 4 as a fulcrum. In this way, the movement of both ends of the second transmission member 32 is more coordinated, reducing the imbalance caused by unilateral swing, improving the stability and reliability of the entire system. In addition, since the connecting piece 4 is located at the middle position, it can better disperse and balance the power from the first transmission member 31, so that the displacement of both ends of the second transmission member 32 is more uniform, and the power of the first transmission member 31 can be better distributed to both ends of the second transmission member 32. This design makes the power transmission more efficient, reducing energy loss.

[0077] As shown in FIGS. 1-2, in one embodiment of the present disclosure, the cleaning part 2 further comprises an assembly piece 23, the first brush head 21 and the second brush head 22 are arranged on the assembly piece 23, and the assembly piece 23 is attached to one end of the brush head body 1.

[0078] Specifically, the assembly part 23 is used to carry the first brush head 21 and the second brush head 22 as part of the cleaning part 2. The assembly part 23 is attached to one end of the brush head body 1, so that the entire cleaning part 2 is connected to the brush head body 1 as a whole. The assembly part 23 not only serves as a mounting base for the first brush head 21 and the second brush head 22, but also as a connecting device between the entire cleaning part 2 and the brush head body 1. The arrangement of the assembly part 23 enables the first brush head 21 and the second brush head 22 to be firmly fixed on the brush head and to be able to swing or rotate accordingly with the movement of the second transmission part 32. By integrating the first brush head 21 and the second brush head 22 through the assembly part 23, the entire cleaning part 2 is more stable, reducing the risk of shaking or loosening caused by independent installation. The design of the assembly part 23 simplifies the assembly process of the brush head, and the user only needs to fix the assembly part 23 at one end of the brush head body 1, without the need to separately install each brush head, reducing the assembly difficulty. The first brush head 21 and the second brush head 22 share one assembly part 23, so that they can work together to improve cleaning efficiency when working. In particular, the second brush head 22 can effectively rotate or swing through eccentric cooperation, further enhancing the cleaning effect. If the brush head needs to be replaced, the user only needs to replace the entire assembly part 23, without the need to separately replace the first brush head 21 or the second brush head 22, simplifying the replacement process.

[0079] As shown in FIGS. 4-8, in one embodiment of the present disclosure, the second brush head 22 has opposite first and second sides, the first side extending with bristles 221; the second side is formed with a pivot part 222, which is pivotably cooperated with the assembly part 23.

[0080] Specifically, the second brush head 22 is provided with two opposite sides, namely the first side and the second side, and the first side uniformly extends with bristles 221, which are used for cleaning teeth. The second side is provided with a pivot part 222, which is pivotably cooperated with the assembly part 23, and the brush head can rotate relative to the assembly part 23 through the pivot part 222. When the first transmission part 31 rotates reciprocatingly around the first axis, the first transmission part 31 drives one end of the second transmission part 32 to reciprocate, and the other end of the second transmission part 32 is eccentrically cooperated with the pivot part 222 of the second brush head 22 on the assembly part 23. When the one end of the second transmission part 32 swings, the other end will displace along the direction of the first axis, and this displacement will be transmitted to the second brush head 22 through the pivot part 222, so that the second brush head 22 can reciprocate or swing.

[0081] As shown in FIGS. 9-11, in one embodiment of the present disclosure, the other end of the second transmission member 32 is formed with a driving member 6 that matches the second brush head 22 eccentrically, and the second side surface is formed with an engaging member 7 that is offset from the side surface center position, the driving member 6 matches the engaging member 7, and when the one end of the second transmission member 32 swings, the second transmission member 32 swings around the connecting member 4 as a fulcrum, and the driving member 6 drives the second brush head 22 to rotate.

[0082] Specifically, the driving member 6 is located at the other end of the second transmission member 32 and matches the engaging member 7 of the second brush head 22 eccentrically, the engaging member 7 is located on the second side surface of the second brush head 22 and is offset from the side surface center position. The driving member 6 is located at the other end of the second transmission member 32, and its shape and position can match the engaging member 7 on the second brush head 22, which ensures that power can be effectively transmitted from the second transmission member 32 to the second brush head 22. The arrangement of the engaging member 7 enables the second brush head 22 to reciprocatingly rotate or swing under the driving of the driving member 6 of the second transmission member 32. The eccentric matching enables the second brush head 22 to reciprocatingly rotate or swing when the one end of the second transmission member 32 swings, by driving the engaging member 7 through the driving member 6, so that the second brush head 22 moves more flexibly and can better adapt to the shape of the tooth surface.

[0083] As shown in FIGS. 9-11, in one embodiment of the present disclosure, the driving member 6 is an open slot member, and the engaging member 7 is a cylindrical member, and the diameter of the open slot member is greater than the diameter of the cylindrical member.

[0084] Specifically, the driving member 6 is arranged as an open slot member, so that the driving member 6 can accommodate the engaging member 7 and drive the engaging member 7 to move correspondingly when swinging. The diameter of the open slot member is greater than the diameter of the engaging member 7, so that the cylindrical member can slide freely in the open slot to achieve eccentric matching. The engaging member 7 is a cylindrical member and is located on the second side surface of the second brush head 22 and is offset from the side surface center position, so that the engaging member 7 can slide in the open slot member to achieve rotation or swinging of the second brush head 22.

[0085] When the external vibration source is started, the first transmission member 31 reciprocatingly rotates around the first axis. The first transmission member 31 drives the one end of the second transmission member 32 to reciprocatingly swing. Due to the limiting of the limiting section 321 of the second transmission member 32 by the limiting portion, the other end of the second transmission member 32 swings or displaces around the connecting member 4 as a fulcrum. When the one end of the second transmission member 32 swings, the other end swings around the connecting member 4 as a fulcrum. Since the driving member 6 is an open slot member and the engaging member 7 is a cylindrical member, the diameter of the open slot member is greater than the diameter of the cylindrical member, so that the cylindrical member can slide in the open slot, and this sliding enables the driving member 6 to drive the engaging member 7, and further enables the second brush head 22 to reciprocatingly rotate or swing.

[0086] As shown in FIG. 1, in one embodiment of the present disclosure, the first transmission member 31 is connected to the brush head body 1 along the extension direction of the first axis. When the external vibration source drives the first transmission member 31, the first transmission member 31 drives the brush head body 1 to reciprocate the first brush head 21 and the second brush head 22.

[0087] The first transmission member 31 is connected to the brush head body 1, located inside the brush head body 1, and arranged along the extension direction of the first axis. When the first transmission member 31 is driven by the external vibration source, it not only drives the second transmission member 32 to swing, but also drives the first brush head 21 and the second brush head 22 to reciprocate together through the brush head body 1. Through the vibration of the brush head body 1 driven by the first transmission member 31 and the rotation of the second brush head 22 driven by the second transmission member 32, the brush head can perform multiple movement modes during use, improving the cleaning effect.

[0088] As shown in FIG. 1, in one embodiment of the present disclosure, a limiting groove 231 is arranged in the assembly part 23. One end of the second transmission member 32 is connected to the first transmission member 31, and the other end is accommodated in the limiting groove 231. When the external vibration source drives the first transmission member 31, the first transmission member 31 drives one end of the second transmission member 32 to reciprocate, and the other end of the second transmission member 32 reciprocates in the opposite direction, driving the second brush head 22 to reciprocate.

[0089] Specifically, one end of the second transmission member 32 is connected to the first transmission member 31, and the other end is accommodated in the limiting groove 231 in the assembly part 23. Since the other end of the second transmission member 32 is accommodated in the limiting groove 231 in the assembly part 23, the limiting groove 231 limits the movement of the second transmission member 32. The limiting groove 231 is arranged in the assembly part 23 and is used to accommodate the other end of the second transmission member 32. The design of the limiting groove 231 limits the movement range of the other end of the second transmission member 32, ensuring that it can only swing along the predetermined trajectory. The first transmission member 31 is connected to one end of the second transmission member 32. When the first transmission member 31 rotates, it drives one end of the second transmission member 32 to reciprocate. The limiting groove 231 limits the other end of the second transmission member 32, which swings around the connecting part 4 as the fulcrum. This swing is in the opposite direction, allowing the second brush head 22 to reciprocate or swing.

[0090] As shown in FIG. 12, in the second aspect of the present disclosure, the present disclosure provides an electric toothbrush, comprising: a machine body 9, the machine body 9 is configured to be held; a power shaft 8, the power shaft 8 is installed on the machine body 9; a brush head as described above, the brush head is configured to be connected to the machine body 9 through the power shaft 8, the power shaft 8 is configured as an external vibration source of the brush head, and the cleaning part 2 of the brush head is configured to vibrate relative to the machine body 9.

[0091] Specifically, the body 9 is configured for holding, usually made of plastic or metal material, and the surface is treated with anti-slip treatment, so that the user can firmly hold it during use. The power source (such as a motor), battery and other electronic control components are installed on the body 9. The power shaft 8 is installed on the body 9, one end of which is connected to the power source, and the other end is connected to the brush head. The power shaft 8 is configured as an external vibration source of the brush head, and when the power source is started, the power shaft 8 will transmit power to the brush head, so that the brush head can vibrate. The brush head is configured to be connected to the body 9 through the power shaft 8, and the cleaning part 2 is configured to vibrate relative to the body 9. The brush head is as described above, and the specific structure can refer to the foregoing, which will not be repeated here.

[0092] When the power source is started, the power shaft 8 reciprocates around the first axis. The power shaft 8 transmits power to the power input end of the brush head, so that the first transmission member 31 reciprocates around the first axis. The first transmission member 31 drives one end of the second transmission member 32 to reciprocate. Through the power transmission of the power shaft 8, the brush head can reciprocate and rotate, and this motion mode can better adapt to the shape of the tooth surface and improve the cleaning effect.

[0093] As shown in FIG. 12, in one embodiment of the present disclosure, the limiting part is a limiting area 5 provided on the body 9, and the limiting area 5 is configured to extend along the circumferential direction of the body 9; the limiting segment 321 of the second transmission member 32 is configured to extend into the limiting area 5.

[0094] The limiting area 5 is configured to extend along the circumferential direction of the body 9, thereby limiting the movement range of the second transmission member 32. The circumferential extension design of the limiting area 5 ensures that the movement trajectory of the second transmission member 32 is along the predetermined path, so that the second transmission member 32 does not deviate from the set movement range when swinging, thereby ensuring the stability and reliability of the system. Through the guiding action of the limiting area 5, the movement of the second transmission member 32 is more orderly, reducing unnecessary shaking or shaking, and improving the stability of the entire system.

[0095] The brush head and the electric toothbrush provided by the present disclosure can realize the multi-modal composite motion of reciprocating vibration and reciprocating rotation, and enhance the cleaning ability of the interdental gap and the tooth root.

[0096] It should be noted that, for the foregoing method embodiments, the purposes of brief description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present disclosure is not limited to the order of the actions described, because according to the present disclosure, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present disclosure.

[0097] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0098] The preferred embodiments of the present disclosure disclosed above are only used to help explain the present disclosure. The alternative embodiments do not describe all the details and limit the invention to the specific embodiments described. Obviously, according to the content of the present disclosure, many modifications and changes can be made. The present disclosure selects and describes these embodiments in order to better explain the principles and practical applications of the present disclosure, so that those skilled in the art can well understand and utilize the present disclosure. The present disclosure is limited by the claims and their full scope and equivalents.

Claims

1. A brush head configured to be mounted on a body (9), characterized in that, The brush head comprises: a brush head body (1) configured to extend along a first axis, comprising a side wall defining an open cavity; a cleaning part (2) attached to one end of the brush head body (1), the cleaning part (2) comprising a first brush head (21) and a second brush head (22) configured to be pivotable; a transmission part (3) at least partially disposed in the cavity, comprising a first transmission member (31) and a second transmission member (32), wherein: the first transmission member (31) and the second transmission member (32) are connected by a connecting member (4) extending along the first axis, and the second transmission member (32) is configured to cooperate with a limiting part (5) provided on the machine body (9) at one end and to eccentrically cooperate with the second brush head (22) at the other end; when the first transmission member (31) is driven by an external vibration source, the first transmission member (31) drives one end of the second transmission member (32) to swing, and the second transmission member (32) swings at the other end along the opposite direction as a pivot point of the connecting member (4), thereby driving the second brush head (22) to rotate.

2. The brush head of claim 1, wherein, The other end of the second transmission member (32) swings along the opposite direction as a pivot point of the connecting member (4), thereby driving the second brush head (22) to rotate.

3. The brush head of claim 1, wherein, The first transmission member (31) is provided with a groove (41) at one end, and the second transmission member (32) is provided with a cooperating part (42) configured to cooperate with the groove (41) to form the connecting member (4).

4. The brush head according to claim 3, wherein: when the first transmission member (31) is driven by the external vibration source, the first transmission member (31) reciprocally rotates around the first axis and drives one end of the second transmission member (32) to reciprocally swing; when one end of the second transmission member (32) reciprocally swings, the other end of the second transmission member (32) reciprocally swings along the opposite direction as a pivot point of the connecting member (4), thereby driving the second brush head (22) to reciprocally rotate.

5. The brush head of claim 4, wherein, The limiting part is provided with a limiting area (5), and one end of the second transmission member (32) is provided with a limiting section (321), and the limiting area (5) is configured to cooperate with the limiting section (321).

6. The brush head of claim 5, wherein, The limiting area (5) limits the movement of the limiting section (321), and the other end of the second transmission member (32) is relatively displaced along the first axis with respect to the connecting member (4).

7. The brush head of claim 4, wherein, Along the first axis, the connecting member (4) is located between the other end of the second transmission member (32) and the limiting part.

8. The brush head of claim 1, wherein, Along the first axis, the connecting member (4) is located between one end and the other end of the second transmission member (32).

9. The brush head of claim 1, wherein, The cleaning part (2) further comprises an assembly part (23), and the first brush head (21) and the second brush head (22) are both provided on the assembly part (23), and the assembly part (23) is attached to one end of the brush head body (1).

10. The brush head of claim 9, wherein, The second brush head (22) has opposite first and second sides, the first side extending with bristles (221); The second side is formed with a pivot part (222) pivotably connected with the assembly part (23).

11. The brush head of claim 10, wherein, The other end of the second transmission part (32) is formed with a driving part (6) eccentrically connected with the second brush head (22), the second side is correspondingly formed with an engaging part (7) deviated from the side center position, the driving part (6) is connected with the engaging part (7), when one end of the second transmission part (32) swings, the second transmission part (32) takes the connecting part (4) as a fulcrum, drives the driving part (6) to rotate the second brush head (22).

12. The brush head of claim 11, wherein, The driving part (6) is an open slot member, and the engaging part (7) is a cylindrical member, the diameter of the open slot member is greater than the diameter of the cylindrical member.

13. The brush head of claim 9, wherein, Along the extension direction of the first axis, the first transmission part (31) is connected with the brush head body (1), when the external vibration source drives the first transmission part (31), the first transmission part (31) drives the brush head body (1) to drive the first brush head (21) and the second brush head (22) to reciprocate.

14. The brush head of claim 13, wherein, The assembly part (23) is provided with a limiting groove (231), one end of the second transmission part (32) is connected with the first transmission part (31), and the other end is accommodated in the limiting groove (231), when the external vibration source drives the first transmission part (31), the first transmission part (31) drives one end of the second transmission part (32) to reciprocate, and the other end of the second transmission part (32) reciprocates in the opposite direction to drive the second brush head (22) to reciprocate.

15. An electric toothbrush, characterized by Comprising: A machine body (9) configured for holding; A power shaft (8) mounted on the machine body (9); The brush head according to any one of claims 1-14 is configured to be connected with the machine body (9) through the power shaft (8), the power shaft (8) is configured as an external vibration source of the brush head, and the cleaning part (2) of the brush head is configured to vibrate relative to the machine body (9).

16. The electrically powered toothbrush according to claim 15, wherein The limiting part is a limiting area (5) provided on the machine body (9), the limiting area (5) is configured to extend along the circumferential direction of the machine body (9); and the limiting segment (321) of the second transmission part (32) is configured to extend into the limiting area (5).

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