A toothbrush head

Abstract

This utility model discloses a toothbrush head, including a bristle-planting head, a support assembly, and a handle. A power unit is disposed within the handle and connected to the bristle-planting head. The power unit controls the rotation of the bristle-planting head within the support assembly. The bristle-planting head includes a bristle-planting section, a drive shaft, and a driven section. One end of the drive shaft is fixedly connected to the bristle-planting section, and the other end is fixedly connected to the driven section. The driven section includes a driven rotating component, and the power unit includes a main rotating component. Both the driven and main rotating components have bevel gear structures and are meshed together to transmit power from the power unit to the driven section via bevel gear transmission. The support assembly has a notch for the drive shaft to pass through, allowing the drive shaft to engage and rotate within the support assembly. The first end face of the support assembly abuts against the bristle-planting section, and the second end face abuts against the driven section. The support assembly is fixedly connected to one end of the handle. This design offers advantages such as simple assembly structure, high transmission efficiency, and low noise.

Description

Technical Field

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

[0002] Currently, the market offers a wide variety of toothbrush handle styles, and most toothbrush heads are universal. However, despite the small differences in shape and structure between toothbrush heads, variations in processing precision, R&D capabilities, and production technology among different manufacturers result in inconsistent matching between toothbrush heads and handles. This problem directly leads to the inability of the high-frequency mechanical energy generated by the handle motor to be effectively absorbed and conducted during use. For example, existing patent document CN2643857Y discloses an electric toothbrush with a left-right oscillating brush head. The bristle head and handle are directly connected via a fan-shaped convex shoulder on the bristle implant and a concave groove on the handle. When the power unit of the handle drives the bristle implant to rotate, relative rotation occurs between the cylindrical through-hole in the center of the bristle implant and the convex shaft of the handle, as well as between the fan-shaped convex shoulder on the side of the bristle implant and the concave groove of the handle. This multi-friction structure significantly reduces transmission efficiency, converting a large amount of input mechanical energy into useless frictional heat and vibration noise, not only reducing energy utilization but also significantly increasing equipment operating noise. Utility Model Content

[0003] This invention provides a toothbrush head that solves the problem that the high-frequency mechanical energy generated by the handle motor cannot be effectively absorbed and conducted by the toothbrush head during use after the toothbrush head is assembled into the handle.

[0004] The present invention provides a toothbrush head comprising: a bristle-embedding head, a support assembly, and a handle;

[0005] The brush handle is provided with a power unit, which is connected to the bristle implantation head. The power unit is used to control the bristle implantation head to rotate within the support assembly.

[0006] The tufting head includes a tufting part, a drive shaft, and a driven part for connecting to the power part. One end of the drive shaft is fixedly connected to the tufting part, and the other end of the drive shaft is fixedly connected to the driven part.

[0007] The driven part includes a driven rotating member, and the power part includes a main rotating member. Both the driven rotating member and the main rotating member have bevel gear structures. The driven rotating member and the main rotating member are meshed and connected to realize that the power of the power part is transmitted to the driven part in a bevel gear transmission manner.

[0008] The support component has a notch for the transmission shaft to pass through, allowing the transmission shaft to be engaged into the support component and rotatably connected to it; the first end face of the support component abuts against the tufted portion, and the second end face of the support component abuts against the driven portion.

[0009] The support component is fixedly connected to one end of the brush handle.

[0010] Furthermore, a circular hole is provided in the middle of the support component, the circular hole being used to embed the drive shaft and fit against the outer surface of the drive shaft, and the notch communicating with the circular hole;

[0011] The width of the notch is smaller than the diameter of the drive shaft; a slot communicating with the circular hole is provided on the side of the circular hole away from the notch, the slot is used to help the width of the notch increase when the drive shaft passes through the notch, and to help the width of the notch return to normal when the drive shaft leaves the notch and is inserted into the circular hole.

[0012] Furthermore, a first protrusion is provided between the first end face and the hair-planting part, and the first protrusion is provided on the first end face or the hair-planting part. A second protrusion is provided between the second end face and the driven part, and the second protrusion is provided on the second end face or the driven part. The first protrusion and the second protrusion are respectively used to reduce the friction area between the support component and the hair-planting part and the driven part.

[0013] Furthermore, the brush handle is provided with a groove, the groove wall of which is connected to the side of the support component; the groove wall is provided with a locking member, and the side of the support component is provided with a locking groove that cooperates with the locking member; or the groove wall is provided with a locking groove, and the side of the support component is provided with a locking member that cooperates with the locking groove; the locking groove and the locking member are used to press the support component into the groove of the brush handle so that the side of the support component is fixedly connected to the groove wall of the groove.

[0014] Furthermore, the second end face of the support component is provided with a protrusion, and the side of the protrusion is provided with a clip or slot that connects to the groove wall. The groove wall is provided with a guide groove that cooperates with the protrusion. The clip or slot of the groove wall is disposed in the groove. The guide groove is used to guide the protrusion into the groove so that the clip and the slot are smoothly aligned.

[0015] Furthermore, the driven part includes a driven rotating member located on one side of the transmission shaft. The support assembly has symmetrically arranged protrusions on both sides, and the driven rotating member is distributed between the protrusions on both sides. The power part includes a main rotating member connected to the driven rotating member to control the driven rotating member to swing back and forth between the protrusions on both sides, thereby driving the rotating shaft to rotate back and forth in the circular hole, realizing the back and forth rotation of the hair-planting part.

[0016] Furthermore, the power unit includes a rotating shaft, and the main rotating member is disposed on one side of the end of the rotating shaft. The center line of the rotating shaft is perpendicular to the center line of the transmission shaft. The transmission shaft is connected to two driven rotating members, and the main rotating member is embedded in a recess between the two driven rotating members. Alternatively, the rotating shaft is connected to two main rotating members, and the driven rotating member is embedded in a recess between the two main rotating members. The recess is configured to cooperate with the driven rotating member or the main rotating member to drive the driven rotating member to rotate back and forth around the center line of the transmission shaft when the main rotating member rotates back and forth around the center line of the rotating shaft.

[0017] Furthermore, the main rotating member and the driven rotating member are inclined and coplanar, and the part of the main rotating member and the driven rotating member that are in contact with each other is a convex arc surface.

[0018] Furthermore, a base is provided in the groove and on the side of the driven part away from the bristle-planting part. The base is used to restrict the driven part from moving toward the bottom of the groove. The base is provided with a through hole facing the rotating shaft. The brush handle also includes a receiving shaft. One end of the receiving shaft is fixedly connected to the end of the rotating shaft, and the other end of the receiving shaft is rotatably connected to the through hole. The diameter of the receiving shaft is smaller than that of the rotating shaft.

[0019] Furthermore, the brush handle includes a handle shaft, which is used to insert the handle so that the motor output shaft of the handle is connected to the rotating shaft. The rotating shaft is rotatably connected to the handle shaft, and the center lines of the receiving shaft, the rotating shaft, the outer shell of the brush handle, and the handle shaft are collinear.

[0020] As can be seen from the above technical solutions, this utility model has the following advantages: In this embodiment, the main rotating component and the driven rotating component adopt a bevel gear structure to achieve transmission between the transmission part and the driven part via bevel gear transmission, which has the advantages of high transmission efficiency, strong load-bearing capacity, good stability, and low transmission noise; by inserting the transmission shaft of the tufting head into the support component from one side notch, the support component restricts the radial movement of the transmission shaft, i.e., restricts the left and right movement of the tufting head relative to the support component; by abutting the tufting part with the first end face of the support component and abutting the driven part with the second end face of the support component, the axial movement of the transmission shaft is restricted by the first and second end faces of the support component, i.e., restricts the up and down movement of the tufting head relative to the support component; the transmission shaft is rotatably connected to the support component, causing the tufting head to rotate relative to the support component under the action of the power unit; furthermore, by fixing the support component to the brush handle, there is no need to set up additional auxiliary components on the tufting head to connect with the brush handle to avoid the tufting head from... The brush handle moves relative to the drive unit. Therefore, when the power unit drives the driven unit to rotate, the driven unit drives the transmission shaft to rotate within the support assembly and drives the bristle-planting part to rotate. Rotational friction occurs only at and near the transmission shaft and the support assembly. There is no additional rotational friction between the auxiliary components connecting the bristle-planting head and other parts of the support assembly or the brush handle. This effectively simplifies the connection structure of the bristle-planting head, reduces the source of vibration and noise from the bristle-planting head, and reduces the loss of transmission energy. Furthermore, in this embodiment, the driving force of the power unit on the bristle-planting part acts directly on the transmission shaft, directly overcoming the mechanical friction during rotation at and near the transmission shaft. This simplifies the transmission path, reduces torque loss, further improves transmission efficiency, and reduces the noise of the bristle-planting head during rotation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the overall structure of a toothbrush head provided for an embodiment of this utility model;

[0023] Figure 2 An exploded view of a toothbrush head structure provided for an embodiment of this utility model;

[0024] Figure 3 A schematic diagram of the bristle-embedding structure of a toothbrush head provided in an embodiment of this utility model;

[0025] Figure 4A schematic diagram of the connection structure between the power unit and the driven unit of a toothbrush head provided for an embodiment of this utility model;

[0026] Figure 5 A schematic diagram of a toothbrush head support component structure provided for an embodiment of this utility model;

[0027] Figure 6 A top view schematic diagram of a toothbrush head support component structure provided in an embodiment of this utility model;

[0028] Figure 7 A schematic diagram of the assembly of a toothbrush head support component and a bristle implantation head provided for an embodiment of this utility model;

[0029] Figure 8 A cross-sectional schematic diagram of a toothbrush head support component, bristle head assembly, and brush handle groove assembly structure provided for an embodiment of this utility model.

[0030] Figure 9 A schematic diagram of the groove structure of a brush handle provided for an embodiment of this utility model;

[0031] Figure 10 This is a cross-sectional view of a toothbrush head provided for an embodiment of the present utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Bristle head; 11. Bristle insertion part; 12. Drive shaft; 13. Driven part; 131. Driven rotating component; 132. Recess; 2. Brush handle; 21. Rotating shaft; 211. Main rotating component; 22. Receiving shaft; 23. Handle shaft; 24. Groove; 241. Clip; 2411. Bevel; 2412. Flat surface; 25. Base; 251. Through hole; 3. Support assembly; 31. Notch; 32. First end face; 33. Second end face; 34. Round hole; 35. Slot; 36. First protrusion; 37. Second protrusion; 38. Protrusion; 381. Slot; 39. Guide groove. Detailed Implementation

[0034] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0038] Please see Figure 1-10 The toothbrush head provided in this embodiment includes: a bristle-embedding head 1, a support component 3, and a brush handle 2;

[0039] The brush handle 2 is equipped with a power unit, which is connected to the bristle implantation head 1. The power unit is used to control the rotation of the bristle implantation head 1 within the support assembly 3.

[0040] The tufting head 1 includes a tufting part 11, a drive shaft 12, and a driven part 13 for connecting to a power part. One end of the drive shaft 12 is fixedly connected to the tufting part 11, and the other end of the drive shaft 12 is fixedly connected to the driven part 13.

[0041] The support component 3 is provided with a notch 31, which allows the drive shaft 12 to pass through and be inserted into the support component 3 for rotatable connection. The first end face 32 of the support component 3 abuts against the tufting part 11, and the second end face 33 of the support component 3 abuts against the driven part 13.

[0042] The support component 3 is fixedly connected to one end of the brush handle 2.

[0043] Understandably, in specific implementation, by inserting the drive shaft 12 of the tufting head 1 into the support assembly 3 through a notch 31 on one side, the support assembly 3 restricts the radial movement of the drive shaft 12, thus restricting the left-right movement of the tufting head 1 relative to the support assembly 3. The first end face 32 of the support assembly 3 abuts against the tufting part 11, and the second end face 33 of the support assembly 3 abuts against the driven part 13, thus restricting the axial movement of the drive shaft 12, thus restricting the up-down movement of the tufting head 1 relative to the support assembly 3. The drive shaft 12 is rotatably connected to the inside of the support assembly 3, allowing the tufting head 1 to rotate relative to the support assembly 3 under the action of the power unit. Furthermore, because the support assembly 3 is fixedly connected to the brush handle 2, there is no need to additionally install auxiliary components and the brush handle 2 on the tufting head 1. The connection is designed to prevent relative movement between the bristle implantation head 1 and the brush handle 2. Therefore, when the power unit drives the driven part 13 to rotate, the driven part 13 drives the transmission shaft 12 to rotate within the support assembly 3 and drives the bristle implantation part 11 to rotate. Rotational friction occurs only at and near the transmission shaft 12 with the support assembly 3, without any additional auxiliary components connecting the bristle implantation head 1 to other parts of the support assembly 3 or the brush handle 2 causing rotational friction. This effectively simplifies the connection structure of the bristle implantation head 1, reduces the source of vibration and noise from the bristle implantation head 1, and reduces the loss of transmission energy. Furthermore, in this embodiment, the driving force of the power unit on the bristle implantation part 11 acts directly on the transmission shaft 12, directly overcoming the mechanical friction during rotation at and near the transmission shaft 12, simplifying the transmission path, reducing torque loss, significantly improving transmission efficiency, and reducing the noise of the bristle implantation head 1 during rotation.

[0044] In a more specific embodiment, such as Figure 5 and Figure 6 As shown, a circular hole 34 is provided in the middle of the support component 3. The circular hole 34 is used to embed the drive shaft 12 and fit against the outer surface of the drive shaft 12. The notch 31 is connected to the circular hole 34.

[0045] The width of the notch 31 is smaller than the diameter of the drive shaft 12; a slot 35 communicating with the round hole 34 is provided on the side away from the notch 31. The slot 35 is used to make the width of the auxiliary notch 31 larger when the drive shaft 12 passes through the notch 31, and to restore the width of the auxiliary notch 31 when the drive shaft 12 leaves the notch 31 and is inserted into the round hole 34.

[0046] Understandably, in practical implementation, by providing a slot 35 on the side of the circular hole 34 away from the notch 31, when the drive shaft 12 is inserted into the notch 31, the slot 35 deforms to increase the width of the notch 31, facilitating the passage of the drive shaft 12; when the drive shaft 12 is inserted into the circular hole 34, the slot 35 returns to its original position to restore the width of the notch 31, ensuring that most of the outer circle of the drive shaft 12 is surrounded by the support assembly 3, effectively preventing the drive shaft 12 from coming out. When the drive shaft 12 rotates, abnormal swaying is reduced, ensuring... Operational reliability: When the width of the notch 31 is less than the shaft diameter, after the drive shaft 12 enters the circular hole 34, except for the small contact blind zone at the notch 31, most of the outer circular surface of the drive shaft 12 will be tightly fitted with the inner wall of the circular hole 34, achieving the fit between the inner arc surface of the circular hole 34 and the outer arc surface of the drive shaft 12. The support component thus provides a uniform radial constraint force, preventing the drive shaft 12 from shaking or becoming eccentric during operation. This results in stronger rotational stability when the drive shaft 12 rotates relative to the circular hole 34, significantly reducing the rotational noise of the tufting head 1. Therefore, this embodiment not only considers the convenience of assembly but also ensures the reliability of the structure. The notch 31 provides a convenient installation channel for the drive shaft 12, allowing it to be inserted into the support component 3 without complex operations. The mechanical constraint formed by the width difference ensures that the structural stability is not affected under simple assembly methods.

[0047] In a more specific implementation, such as Figure 5 As shown, a first protrusion 36 is provided between the first end face 32 and the hair-planting part 11. The first protrusion 36 is provided on the first end face 32 or the hair-planting part 11. A second protrusion 37 is provided between the second end face 33 and the driven part 13. The second protrusion 37 is provided on the second end face 33 or the driven part 13. The first protrusion 36 and the second protrusion 37 are respectively used to reduce the friction area between the support component 3 and the hair-planting part 11 and the driven part 13.

[0048] Understandably, in specific implementation, the first end face 32 and the second end face 33 of the support component 3 abut against the bristle-planting part 11 and the driven part 13 of the support component 3, respectively, effectively limiting the vibration of the bristle-planting head 1 in the axial direction of the support component 3; at the same time, the first protrusion 36 and the second protrusion 37 precisely abut against the bristle-planting part 11 and the driven part 13, respectively, which not only meets the abutment requirements, but also significantly reduces the friction area between the support component 3 and the bristle-planting part 11 and the driven part 13, which is conducive to reducing friction loss, improving transmission efficiency, and reducing friction noise.

[0049] In a more specific embodiment, the brush handle 2 is provided with a groove 24, the groove wall of which is connected to the side of the support component 3; the groove wall is provided with a slot 381, and the side of the support component 3 is provided with a locking piece 241 that cooperates with the slot 381; the slot 381 and the locking piece 241 are used to press the support component 3 into the groove 24 of the brush handle 2 so that the side of the support component 3 is fixedly connected to the groove wall of the groove 24.

[0050] In some more specific implementations, such as Figure 8 and Figure 9 As shown, the groove wall is provided with a locking piece 241, and the side of the support component 3 is provided with a locking groove 381 that mates with the locking piece 241.

[0051] Understandably, in practice, by pressing the support component 3, it is guided into the groove 24 by the side wall of the groove 24; when the slot 381 aligns with the clip 241, the clip 241 automatically embeds into the slot 381, thereby achieving a fixed connection between the support component 3 and the side wall of the groove 24. This design ensures stable and reliable installation of the support component 3 while simplifying the installation process, effectively improving installation efficiency, and achieving a balance between stability and ease of installation.

[0052] In a more specific embodiment, such as Figure 7 and Figure 9 As shown, the second end face 33 of the support component 3 is provided with a protrusion 38. The side of the protrusion 38 is provided with a locking piece 241 or a locking groove 381 that is connected to the groove. The groove wall is provided with a guide groove 39 that is connected to the protrusion 38. The locking piece 241 or the locking groove 381 of the groove wall is set in the groove 24. The guide groove 39 is used to guide the protrusion 38 into the groove 24 so that the locking piece 241 and the locking groove 381 are smoothly aligned.

[0053] Understandably, in practical implementation, the protrusion 38 is guided into the guide groove 39, and the retaining piece 241 or retaining slot 381 on the groove wall is set in the groove 24 to assist in guiding the protrusion 38 into the groove 24 so that the retaining piece 241 and the retaining slot 381 can be smoothly aligned. The guide groove 39 has the function of increasing the contact area between the guide groove 39 and the protrusion 38, so that the retaining piece 241 and the retaining slot 381 can be quickly and accurately aligned, and further ensure that the protrusion 38 of the support assembly 3 is not prone to displacement or loosening in the groove, thus ensuring stability.

[0054] In a more specific embodiment, the groove wall has a retainer 241, such as Figure 8As shown, the protrusion 38 has a groove 381 on its side that mates with the groove wall. The end of the retainer 241 near the opening of the groove 24 has a transition slope 2411, and the end of the retainer 241 away from the opening of the groove 24 is a flat surface 2412. The protrusion 38 is elastic, and the transition slope 2411 is used to guide the protrusion 38 to retract away from the groove wall of the groove 24. When the retainer 241 is inserted into the groove 381, the protrusion 38 unfolds towards the groove wall of the groove 24. One side of the groove wall of the groove 381 and the retainer... The plane 2412 of 241 abuts against the slot 381, so that the slot tightly fastens the clip 241. At the same time, a step is provided on the groove wall near the opening of the groove 24. The support member has an extension on both sides, and one end face of the extension abuts against the step. The step of the groove wall of the groove 24 is used to restrict the movement of the support component 3 towards the bottom of the groove 24. The plane 2412 of the clip 241 on the groove wall of the groove 24 is used to restrict the movement of the support component 3 away from the bottom of the groove 24, so as to realize the fixed connection between the support component 3 and the groove wall of the guide groove 39.

[0055] In a more specific embodiment, such as Figure 4 and Figure 7 As shown, the driven part 13 includes a driven rotating member 131, which is located on one side of the transmission shaft 12. The support assembly 3 has symmetrically arranged protrusions 38 on both sides. The driven rotating member 131 is distributed between the protrusions 38 on both sides. The power part includes a main rotating member 211, which is connected to the driven rotating member 131 to control the driven rotating member 131 to swing back and forth between the protrusions 38 on both sides, thereby driving the rotating shaft to rotate back and forth in the circular hole 34, so as to realize the back and forth rotation of the hair-planting part 11.

[0056] Understandably, in practical implementation, by placing the driven rotating component 131 between the protrusions 38, not only can the installation range of the driven rotating component 131 be effectively limited, thus significantly improving the installation efficiency of the driven rotating component 131 and the main rotating component 211, but the protrusions 38 can also limit the maximum range of motion of the driven rotating component 131, providing good protection. This design can prevent the driven rotating component 131 from losing control of its swing angle due to excessive rotation angle, thereby preventing accidents involving the driven rotating component 131. Without such a design, if a problem occurs, what might have been solved simply by replacing or repairing the motor now requires disassembling the equipment and adjusting the position and structure of the driven rotating component 131, increasing the maintenance steps.

[0057] It should be noted that the limiting angle of the protrusion 38 is set relatively large. Under normal operating conditions, it is not necessary to rely on it to control the angle. The swing angle can be precisely controlled simply by adjusting the rotation angle of the motor, so that the driven rotating part 131 does not collide with the protrusion 38, thus reducing noise. The main function of the protrusion 38 is as a preventive mechanism, specifically designed to deal with situations where the rotation angle of the driven or main rotating part may become uncontrollable due to the motor or other factors.

[0058] In a more specific embodiment, such as Figure 3 and Figure 4 As shown, driven parts 13 are provided with driven rotating members 131 on opposite sides, and support parts are provided with protrusions 38 on opposite sides. The driven rotating members 131 on both sides are located between the protrusions 38 on both sides. When the driven rotating members 131 and the protrusions 38 come into contact and cause a limiting collision, the driven rotating members 131 on both sides abut with different protrusions 38, thereby improving the balance and stability during contact.

[0059] In a more specific embodiment, such as Figure 3 and Figure 4 As shown, the power unit includes a rotating shaft 21, and a main rotating member 211 is disposed on one side of the end of the rotating shaft 21. The center line of the rotating shaft 21 is perpendicular to the center line of the transmission shaft 12. The transmission shaft 12 is connected to two driven rotating members 131, and the main rotating member 211 is embedded in the recess 132 between the two driven rotating members 131; or the rotating shaft 21 is connected to two main rotating members 211, and the driven rotating member 131 is embedded in the recess 132 between the two main rotating members 211. The recess 132 is configured to cooperate with the driven rotating member 131 or the main rotating member 211 to drive the driven rotating member 131 to rotate back and forth around the center line of the transmission shaft 12 when the main rotating member 211 rotates back and forth around the center line of the rotating shaft 21.

[0060] Understandably, in specific implementation, the transmission between the rotating component 131 and the main rotating component 211 is achieved through the recess 132. Only the side of the rotating component 131 abuts against the side wall of the recess 132, or only the side of the main rotating component 211 abuts against the side wall of the recess 132. The number of contact points required when the main rotating component 211 and the rotating component 131 rotate is small, which reduces the noise generated by collision friction.

[0061] In a more specific embodiment, the main rotating member 211 and the driven rotating member 131 are inclined and coplanar, and the part of the main rotating member 211 and the driven rotating member 131 that comes into contact with each other is a convex arc surface.

[0062] Understandably, in practical implementation, by having the main rotating component 211 and the driven rotating component 131 inclined and on the same plane, this design allows them to highly overlap in the vertical transmission direction. This not only saves three-dimensional space, but also achieves line contact through the convex arc surface at their contact point. The inclined contact method has high load-bearing capacity, while the progressive contact characteristics of the convex arc surface reduce gap generation, lower collision noise, and reduce stress, effectively improving the smoothness of the transmission.

[0063] It should be noted that the size and shape of the arc surface directly determine the contact point between the tufting head 1 and the main rotating component 211 when the rotating component 131 is in operation. To ensure that the main rotating component 211 maintains good arc surface contact with the rotating component 131 at different angles when the rotating shaft 21 drives the tufting head 1, achieving a tight fit between the two, this effectively avoids excessive gaps between the rotating component 131 and the main rotating component 211 during rotation. If the gap exceeds the standard, the two main rotating components 211 will collide with the rotating component 131, resulting in significant noise. In this embodiment, by having the main rotating component 211 of the rotating shaft 21 contact the arc surface of the rotating component 131 of the tufting head 1, the operation process remains smooth and light, effectively avoiding noise problems caused by impact.

[0064] In a more specific embodiment, the main rotating component 211 and the driven rotating component 131 are inclined and located on the same plane 2412. The part in contact with each other is a convex arc surface, and both use conical teeth. The driven rotating component 131 includes two conical teeth, and the gap between the two conical teeth forms a recess 132. When the motor drives the rotating shaft 21 to make an angular deflection, the transmission shaft 12 will make a synchronous deflection movement. The main rotating component 211 on the rotating shaft 21 and the recess 132 of the driven component on the tufting head 1 achieve transmission through the conical tooth curved surface cooperation. This cooperation method can make the movement more stable, the fit better, and the noise lower. Meanwhile, bevel gears are used for transmission: their special structure makes them highly efficient, with a smaller meshing angle and less energy loss compared to straight gears; they have strong load-bearing capacity and are suitable for high-load applications; the meshing surface is a cone, so there is no jumping or impact during transmission, resulting in excellent stability and reliability; they can adjust different transmission ratios, making them highly adaptable; the transmission system has a compact structure, occupies little space, and is suitable for mechanical designs with limited space; they are reliable in operation, have a long service life, and low transmission noise.

[0065] It should be noted that the deflection angle of the bristle head 1 in this embodiment is not 360°, but approximately 55°. Simulated brushing tests have verified that a brushing angle of around 30° achieves the best cleaning effect, while allowing for a wider range of oscillation angles is to meet the needs of different consumers.

[0066] In a more specific embodiment, such as Figure 8 and Figure 10 As shown, a base 25 is provided in the groove 24 and on the side of the driven part 13 away from the bristle-planting part 11. The base 25 is used to restrict the driven part 13 from moving toward the bottom of the groove 24. The base 25 is provided with a through hole 251 facing the rotating shaft 21. The brush handle 2 also includes a receiving shaft 22. One end of the receiving shaft 22 is fixedly connected to the end of the rotating shaft 21, and the other end of the receiving shaft 22 is rotatably connected to the through hole 251. The diameter of the receiving shaft 22 is smaller than that of the rotating shaft 21.

[0067] Understandably, in practice, the diameter of the receiving shaft 22 is smaller than that of the rotating shaft 21, reducing the rotational contact area between the rotating shaft 21 and the brush handle 2, thereby improving transmission efficiency and reducing rotational noise. In actual use, each user's brushing force is different, and the base 25 is used to further limit the downward pressure of the bristle head 1, which could cause damage to the main rotating component 211 of the rotating shaft 21 from the rotating component 131.

[0068] In a more specific embodiment, the brush handle 2 includes a handle shaft 23 for inserting into the handle so that the motor output shaft of the handle is connected to the rotating shaft 21. The rotating shaft 21 is rotatably connected to the handle shaft 23, and the center lines of the bearing shaft 22, the rotating shaft 21, the outer shell of the brush handle 2, and the handle shaft 23 are collinear.

[0069] Understandably, in practical implementation, by ensuring that the center lines of the receiving shaft 22, rotating shaft 21, handle motor output shaft, and brush handle 2 housing are collinear, this design significantly reduces abnormal phenomena such as swaying when the handle motor drives the rotating shaft 21, making the rotating shaft 21 operate more smoothly, reducing torque loss, ensuring efficient power transmission, and reducing noise. During the operation of the tufting head 1, the power transmission of the above-mentioned main components always reciprocates around the center line. Centrifugal force analysis shows that this design minimizes the centrifugal force generated during operation, which not only reduces energy consumption and maximizes the transmission of motor power to the tufting head 1 for efficient energy transfer, but also avoids product instability caused by excessive centrifugal force, thereby reducing abnormal swaying amplitude during operation, further ensuring stable operation and reducing noise.

[0070] The assembly steps of the various components of a toothbrush head in this embodiment include:

[0071] The bristle-planting head 1 is inserted into the round hole 34 of the support component 3 through its drive shaft 12 from the notch 31 to form an assembly. This assembly is pressed into the groove 24 of the brush handle 2. The support component 3 is fixed to the side wall of the groove 24 through the cooperation of the clip 241 and the slot 381, so that the bristle-planting head 1 is installed on the brush handle 2 through the support component 3. Subsequently, one end of the receiving shaft 22 and the rotating shaft 21 are fixed. The rotating shaft 21 is connected to the base 25 in the groove 24 of the brush handle 2 through the receiving shaft 22. The main rotating component 211 meshes with the driven rotating component 131. The other end of the rotating shaft 21 is connected to the motor output shaft of the handle through the handle shaft 23. The handle shaft 23 is fixedly connected to the end of the brush handle 2.

[0072] When in use, the output shaft of the handle motor rotates, causing the rotating shaft 21 and the receiving shaft 22 to rotate. The main rotating component 211 rotates with the rotating shaft 21, causing the driven rotating component 131 to rotate, which in turn causes the transmission shaft 12 and the tufting part 11 connected to the driven rotating component 131 to rotate.

[0073] In summary, the toothbrush head provided by this utility model embodiment has the advantages of simple assembly structure, high transmission efficiency, and low noise.

[0074] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A toothbrush head, characterized in that, include: A bristle-planting head, a support assembly, and a brush handle; the brush handle is provided with a power unit, which is connected to the bristle-planting head, and the power unit is used to control the bristle-planting head to rotate within the support assembly; The tufting head includes a tufting part, a drive shaft, and a driven part for connecting to the power part. One end of the drive shaft is fixedly connected to the tufting part, and the other end of the drive shaft is fixedly connected to the driven part. The driven part includes a driven rotating member, and the power part includes a main rotating member. Both the driven rotating member and the main rotating member have bevel gear structures. The driven rotating member and the main rotating member are meshed and connected to realize that the power of the power part is transmitted to the driven part in a bevel gear transmission manner. The support component has a notch for the transmission shaft to pass through, allowing the transmission shaft to be engaged into the support component and rotatably connected to it; the first end face of the support component abuts against the tufted portion, and the second end face of the support component abuts against the driven portion. The support component is fixedly connected to one end of the brush handle.

2. A toothbrush head according to claim 1, characterized in that, The support assembly has a circular hole in the middle, which is used to embed the drive shaft and fit against the outer surface of the drive shaft. The notch communicates with the circular hole. The width of the notch is smaller than the diameter of the drive shaft; a slot communicating with the circular hole is provided on the side of the circular hole away from the notch, the slot is used to help the width of the notch increase when the drive shaft passes through the notch, and to help the width of the notch return to normal when the drive shaft leaves the notch and is inserted into the circular hole.

3. A toothbrush head according to claim 2, characterized in that, A first protrusion is provided between the first end face and the hair-planting part, and the first protrusion is provided on the first end face or the hair-planting part. A second protrusion is provided between the second end face and the driven part, and the second protrusion is provided on the second end face or the driven part. The first protrusion and the second protrusion are respectively used to reduce the friction area between the support component and the hair-planting part and the driven part.

4. A toothbrush head according to claim 3, characterized in that, The brush handle is provided with a groove, and the groove wall is connected to the side of the support component; the groove wall is provided with a locking member, and the side of the support component is provided with a locking groove that cooperates with the locking member; or the groove wall is provided with a locking groove, and the side of the support component is provided with a locking member that cooperates with the locking groove; the locking groove and the locking member are used to press the support component into the groove of the brush handle so that the side of the support component is fixedly connected to the groove wall of the groove.

5. A toothbrush head according to claim 4, characterized in that, The second end face of the support component is provided with a protrusion, and the side of the protrusion is provided with a clip or slot that connects to the groove wall. The groove wall is provided with a guide groove that cooperates with the protrusion. The clip or slot of the groove wall is disposed in the groove. The guide groove is used to guide the protrusion into the groove so that the clip and the slot are smoothly aligned.

6. A toothbrush head according to claim 5, characterized in that, The driven component is located on one side of the drive shaft. The support assembly has symmetrically arranged protrusions on both sides. The driven component is distributed between the protrusions on both sides. The main rotating component is connected to the driven component to control the driven component to swing back and forth between the protrusions on both sides, thereby driving the drive shaft to rotate back and forth in the circular hole, realizing the back and forth rotation of the hair-planting part.

7. A toothbrush head according to claim 6, characterized in that, The power unit includes a rotating shaft, and the main rotating component is disposed on one side of the end of the rotating shaft. The centerline of the rotating shaft is perpendicular to the centerline of the transmission shaft. The transmission shaft is connected to two driven rotating components, and the main rotating component is embedded in a recess between the two driven rotating components. Alternatively, the rotating shaft is connected to two main rotating components, and the driven rotating component is embedded in a recess between the two main rotating components. The recess is configured to cooperate with the driven rotating component or the main rotating component to drive the driven rotating component to rotate back and forth around the centerline of the transmission shaft when the main rotating component rotates back and forth around the centerline of the rotating shaft.

8. A toothbrush head according to claim 7, characterized in that, The main rotating component and the driven rotating component are inclined and coplanar, and the part of the main rotating component and the driven rotating component that are in contact with each other is a convex arc surface.

9. A toothbrush head according to claim 7 or 8, characterized in that, A base is provided in the groove and on the side of the driven part away from the bristle-planting part. The base is used to restrict the driven part from moving toward the bottom of the groove. The base is provided with a through hole facing the rotating shaft. The brush handle also includes a receiving shaft. One end of the receiving shaft is fixedly connected to the end of the rotating shaft, and the other end of the receiving shaft is rotatably connected to the through hole. The diameter of the receiving shaft is smaller than that of the rotating shaft.

10. A toothbrush head according to claim 9, characterized in that, The brush handle includes a handle shaft, which is used to insert into the handle so that the motor output shaft of the handle is connected to the rotating shaft. The rotating shaft is rotatably connected to the handle shaft, and the center lines of the receiving shaft, the rotating shaft, the outer shell of the brush handle, and the handle shaft are collinear.

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