Toothbrush head

Abstract

The invention discloses a toothbrush head which comprises a bristle planting head, a supporting assembly and a brush handle. A power part is arranged in the brush handle, the power part is connected with the flocking head, and the power part is used for controlling the flocking head to rotate in the supporting assembly; the flocking head comprises a flocking part, a transmission shaft and a driven part, one end of the transmission shaft is fixedly connected with the flocking part, and the other end of the transmission shaft is fixedly connected with the driven part; the driven part comprises a driven rotating piece, the power part comprises a driving rotating piece, the driven rotating piece and the driving rotating piece are both of a conical tooth structure, the driven rotating piece and the driving rotating piece are connected in an engaged mode and used for transmitting power of the power part to the driven part in a bevel gear transmission mode, and the supporting assembly is provided with a notch which is used for a transmission shaft to pass through. The transmission shaft is clamped into the supporting assembly and is rotationally connected with the supporting assembly; the first end face of the supporting assembly abuts against the bristle planting part, the second end face of the supporting assembly abuts against the driven part, the supporting assembly is fixedly connected with one end of the brush handle, and the brush has the advantages of being simple in assembly structure, high in transmission efficiency and low in noise.

Description

Technical Field

[0001] The present invention relates to the technical field of electric toothbrushes, in particular to a toothbrush head. Background Art

[0002] Currently, there are a wide variety of toothbrush handle styles on the market, and most toothbrush heads are universal. However, despite the relatively small differences in shape and structure of toothbrush heads, differences in processing precision, R&D capabilities, and production technology between different manufacturers result in poor matching consistency between the toothbrush head and the handle. This problem directly results in the high-frequency mechanical energy generated by the handle motor not being effectively absorbed and conducted by the toothbrush head during use after the toothbrush head is assembled to the handle. For example, existing patent document CN2643857Y discloses an electric toothbrush with a swinging brush head. The bristle head and the brush handle are directly connected by a fan-shaped convex shoulder of the bristle head and a concave arc groove of the brush handle. When the power unit of the brush handle drives the bristle head to rotate, relative rotation occurs between the cylindrical blind hole in the middle of the bristle head and the convex shaft of the brush handle, as well as between the fan-shaped convex shoulder on the side of the bristle head and the concave arc groove of the brush handle. This multi-friction structure significantly reduces transmission efficiency, converting a large amount of input mechanical energy into useless frictional heat and vibration noise, which not only reduces energy utilization but also significantly increases equipment operating noise. Summary of the Invention

[0003] The present invention provides a toothbrush head, which is used to solve 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 to the handle.

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

[0005] A power unit is provided in the brush handle, the power unit is connected to the hair transplanting head, and the power unit is used to control the hair transplanting head to rotate in the support assembly;

[0006] The hair implantation head includes a hair implantation portion, a transmission shaft, and a driven portion connected to the power portion, one end of the transmission shaft is fixedly connected to the hair implantation portion, and the other end of the transmission shaft is fixedly connected to the driven portion;

[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 a bevel gear structure. 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 assembly is provided with a notch, and the notch is used for passing the transmission shaft so that the transmission shaft is clamped into the support assembly and rotatably connected to the support assembly; the first end face of the support assembly abuts against the hair-planting part, and the second end face of the support assembly abuts against the driven part.

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

[0010] Furthermore, a circular hole is provided in the middle of the support assembly, the circular hole is used to embed the transmission shaft and fit with the outer surface of the transmission shaft, and the notch is connected to the circular hole;

[0011] The width of the notch is smaller than the diameter of the transmission shaft; a slot connected to the circular hole is provided on the side of the circular hole away from the notch, and the slot is used to assist the notch width to increase when the transmission shaft passes through the notch, and to assist the notch width to recover when the transmission shaft leaves the notch and is embedded in the circular hole.

[0012] Furthermore, a first protrusion is provided between the first end surface and the hair-implanted portion, and the first protrusion is provided on the first end surface or the hair-implanted portion. A second protrusion is provided between the second end surface and the driven portion, and the second protrusion is provided on the second end surface or the driven portion. The first protrusion and the second protrusion are respectively used to reduce the friction area between the support assembly and the hair-implanted portion and the driven portion.

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

[0014] Furthermore, a protrusion is provided on the second end face of the support assembly, and a clip or a slot connected to the groove wall is provided on the side of the protrusion, and a guide groove cooperating with the protrusion is provided on the groove wall. The clip or slot of the groove wall is provided in the groove, and 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 slave rotating part, which is located on one side of the transmission shaft, and the protrusions are symmetrically arranged on both sides of the support assembly. The slave rotating part is distributed between the protrusions on both sides, and the power part includes a main rotating part. The main rotating part is connected to the slave rotating part to control the slave rotating part to swing back and forth between the protrusions on both sides and then drive the rotating shaft to rotate back and forth in the circular hole to realize the back and forth rotation of the hair implantation part.

[0016] Furthermore, the power unit includes a rotating shaft, the main rotating member is arranged on one side of the end of the rotating shaft, and the center line of the rotating shaft is perpendicular to the center line of the transmission shaft; the transmission shaft is connected to the two slave rotating members, and the main rotating member is embedded in the recess between the two slave rotating members; or the rotating shaft is connected to the two main rotating members, and the slave rotating member is embedded in the recess between the two main rotating members; the recess is cooperated with the slave rotating member or the main rotating member to realize that when the main rotating member rotates back and forth around the center line of the rotating shaft, it drives the slave rotating member to rotate back and forth around the center line of the transmission shaft.

[0017] Furthermore, the main rotating member and the slave rotating member are arranged obliquely and in the same plane, and the contact portion between the main rotating member and the slave rotating member 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 hair-planting part. The base is used to limit the movement of the driven part toward the bottom of the groove. The base is provided with a through hole toward 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 receiving shaft, rotating shaft, the outer shell of the brush handle, and the center line of the handle shaft are collinear.

[0020] From the above technical scheme can be seen, the present application has the following advantages: the main rotating part and the slave rotating part of the embodiment adopt the conical gear structure to realize the transmission between the transmission part and the driven part in the conical gear transmission mode, which has the advantages of high transmission efficiency, strong bearing capacity, good stability, low transmission noise; the transmission shaft of the bristle head is clamped into the support assembly from the side gap of the support assembly, and the radial movement of the transmission shaft is limited by the support assembly, that is, the left and right movement of the bristle head relative to the support assembly is limited; the first end surface of the support assembly abuts against the bristle head, and the second end surface of the support assembly abuts against the driven part, so that the axial movement of the transmission shaft is limited by the first end surface and the second end surface of the support assembly, that is, the up and down movement of the bristle head relative to the support assembly is limited; the transmission shaft is rotatably connected with the inside of the support assembly, so that the bristle head rotates relative to the support assembly under the action of the power part; further, the support assembly is fixedly connected with the brush handle, and no auxiliary part needs to be additionally arranged on the bristle head to connect the brush handle, so that the relative movement between the bristle head and the brush handle is avoided, therefore, when the power part drives the driven part to rotate, the driven part drives the transmission shaft to rotate in the support assembly and drives the bristle head to rotate, only the transmission shaft and its vicinity produce rotational friction with the support assembly, and no additional auxiliary part connected with the bristle head produces rotational friction with other parts of the support assembly or the brush handle, which effectively simplifies the connection structure of the bristle head, reduces the source of vibration noise of the bristle head, reduces the loss of transmission energy, and the driving force of the power part on the bristle part directly acts on the transmission shaft, directly overcomes the mechanical friction in the rotation process at the transmission shaft and its vicinity, simplifies the transmission path, reduces the torque loss, further improves the transmission efficiency, and reduces the noise of the bristle head during rotation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0022] Figure 1 A schematic diagram of the overall structure of the toothbrush head provided by the embodiment of the present application is shown in the figure.

[0023] Figure 2 An exploded schematic diagram of the toothbrush head structure provided by the embodiment of the present application is shown in the figure.

[0024] Figure 3 A schematic diagram of the bristle head structure of the toothbrush head provided by the embodiment of the present application is shown in the figure.

[0025] Figure 4 A schematic diagram of the connection structure of the power part and the driven part of the toothbrush head provided by the embodiment of the present application is shown in the figure.

[0026] Figure 5 A schematic structural diagram of a support assembly for a toothbrush head provided by an embodiment of the present invention;

[0027] Figure 6 A schematic top view of a support assembly structure of a toothbrush head provided by an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the assembly of a support assembly and a bristle implantation head of a toothbrush head provided by an embodiment of the present invention;

[0029] Figure 8 A schematic cross-sectional view of a toothbrush head support assembly, a bristle head assembly, and a groove assembly structure of a brush handle provided by an embodiment of the present invention;

[0030] Figure 9 A schematic diagram of the groove structure of a brush handle provided by an embodiment of the present invention;

[0031] Figure 10 A cross-sectional view of a toothbrush head provided in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Bristle implanting head; 11. Bristle implanting part; 12. Transmission shaft; 13. Driven part; 131. Slave rotating part; 132. Recess; 2. Brush handle; 21. Rotating shaft; 211. Main rotating part; 22. Supporting shaft; 23. Handle shaft; 24. Groove; 241. Clamp; 2411. Inclined surface; 2412. Flat surface; 25. Base; 251. Through hole; 3. Support assembly; 31. Notch; 32. First end face; 33. Second end face; 34. Circular hole; 35. Slot; 36. First protrusion; 37. Second protrusion; 38. Protruding part; 381. Clamping slot; 39. Guide groove. DETAILED DESCRIPTION

[0034] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] The terms "first," "second," "third," "fourth," and so forth (if any) in the description and drawings of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that, for example, the implementation of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product, or apparatus.

[0036] See also Figure 1-10 , a toothbrush head provided by an embodiment of the present invention includes: a bristle head 1, a support assembly 3 and a brush handle 2;

[0037] A power unit is provided in the brush handle 2 , and the power unit is connected to the hair transplanting head 1 . The power unit is used to control the hair transplanting head 1 to rotate in the support assembly 3 .

[0038] The hair transplanting head 1 includes a hair transplanting portion 11, a transmission shaft 12, and a driven portion 13 for connecting to the power portion. One end of the transmission shaft 12 is fixedly connected to the hair transplanting portion 11, and the other end of the transmission shaft 12 is fixedly connected to the driven portion 13.

[0039] The support assembly 3 is provided with a notch 31, which is used to pass the transmission shaft 12 so that the transmission shaft 12 is inserted into the support assembly 3 and is rotatably connected to the support assembly 3; the first end face 32 of the support assembly 3 abuts against the hair-planting portion 11, and the second end face 33 of the support assembly 3 abuts against the driven portion 13.

[0040] The support assembly 3 is fixedly connected to one end of the brush handle 2 .

[0041] It can be understood that, in a specific implementation, the transmission shaft 12 of the hair transplanting head 1 is inserted into the support assembly 3 from the notch 31 on one side of the support assembly 3, and the support assembly 3 limits the radial movement of the transmission shaft 12, that is, the left and right movement of the hair transplanting head 1 relative to the support assembly 3 is limited; the first end face 32 of the support assembly 3 abuts against the hair transplanting portion 11 and the second end face 33 of the support assembly 3 abuts against the driven portion 13, and the first end face 32 and the second end face 33 of the support assembly 3 limit the axial movement of the transmission shaft 12, that is, the up and down movement of the hair transplanting head 1 relative to the support assembly 3 is limited; the transmission shaft 12 is connected to the inside of the support assembly 3 for rotation, so that the hair transplanting head 1 rotates relative to the support assembly 3 under the action of the power part; further, the support assembly 3 is fixedly connected to the brush handle 2, and there is no need to set additional auxiliary components on the hair transplanting head 1 and the brush handle 2 The connection is used to avoid 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 in the support assembly 3 and drives the rotation of the bristle implantation part 11, and only generates rotational friction with the support assembly 3 at and near the transmission shaft 12, and no additional auxiliary parts connected to the bristle implantation head 1 generate rotational friction with other parts of the support assembly 3 or the brush handle 2, which effectively simplifies the connection structure of the bristle implantation head 1, reduces the source of vibration noise of the bristle implantation head 1, and reduces the loss of transmission energy. In addition, the driving force of the power unit of this embodiment on the bristle implantation part 11 directly acts on the transmission shaft 12, directly overcomes the mechanical friction in the rotation process at and near the transmission shaft 12, simplifies the transmission path, reduces torque loss, significantly improves transmission efficiency, and reduces the noise of the rotation of the bristle implantation head 1.

[0042] In a more specific embodiment, Figure 5 and Figure 6 As shown, a circular hole 34 is provided in the middle of the support assembly 3, the circular hole 34 is used to embed the transmission shaft 12 and fit with the outer surface of the transmission shaft 12, and the notch 31 is connected to the circular hole 34;

[0043] The width of the notch 31 is smaller than the diameter of the transmission shaft 12; a slot 35 connected to the circular hole 34 is provided on the side of the circular hole 34 away from the notch 31. The slot 35 is used to assist the notch 31 to increase in width when the transmission shaft 12 passes through the notch 31, and to assist the notch 31 to restore its width when the transmission shaft 12 leaves the notch 31 and is embedded in the circular hole 34.

[0044] It can be understood that, in a specific implementation, by providing a slot 35 on the side of the circular hole 34 away from the notch 31, when the transmission shaft 12 is inserted into the notch 31, the slot 35 is deformed to assist the notch 31 in increasing its width, thereby facilitating the passage of the transmission shaft 12; when the transmission shaft 12 is inserted into the circular hole 34, the slot 35 is restored to assist the notch 31 in recovering its width, thereby ensuring that most of the outer circle of the transmission shaft 12 is surrounded by the support assembly 3, effectively preventing the transmission shaft 12 from falling out, and reducing abnormal swinging when the transmission shaft 12 rotates, thereby ensuring Reliability of operation: When the width of the notch 31 is smaller than the shaft diameter, after the transmission shaft 12 enters the circular hole 34, except for the smaller contact blind area at the notch 31, most of the outer circular surface of the transmission shaft 12 will fit tightly with the inner wall of the circular hole 34, so that the inner arc surface of the circular hole 34 fits with the outer arc surface of the transmission shaft 12. Therefore, the support member can provide a uniform radial constraint force to prevent the transmission shaft 12 from shaking or eccentricity during operation, so that the rotational stability of the transmission shaft 12 and the circular hole 34 are stronger when the transmission shaft 12 rotates relative to each other, and the rotation noise of the hair implantation head 1 is significantly reduced. Therefore, this embodiment not only takes into account the convenience of assembly, but also ensures the reliability of the structure. The notch 31 provides a convenient installation channel for the transmission shaft 12, and the transmission shaft 12 can be incorporated into the support assembly 3 without complicated operations. The mechanical constraint formed by the width difference ensures that the structural stability under simple assembly is not affected.

[0045] In a more specific implementation, Figure 5 As shown, a first protrusion 36 is provided between the first end face 32 and the hair implantation portion 11, and the first protrusion 36 is provided on the first end face 32 or the hair implantation portion 11. A second protrusion 37 is provided between the second end face 33 and the driven portion 13, and the second protrusion 37 is provided on the second end face 33 or the driven portion 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 implantation portion 11 and the driven portion 13.

[0046] It can be understood that, in specific implementation, the first end face 32 and the second end face 33 of the support component 3 are respectively abutted against the hair implantation part 11 and the driven part 13 of the support component 3, thereby effectively limiting the shaking of the hair implantation head 1 in the axial direction of the support component 3; at the same time, the first protrusion 36 and the second protrusion 37 are respectively precisely abutted against the hair implantation part 11 and the driven part 13, which not only meets the abutment requirements, but also significantly reduces the friction area between the support component 3 and the hair implantation part 11 and the driven part 13, which is beneficial to reducing friction loss, improving transmission efficiency, and reducing friction noise.

[0047] In a more specific embodiment, the brush handle 2 is provided with a groove 24, the groove wall of the groove 24 is connected to the side of the support component 3; the groove wall is provided with a card groove 381, and the side of the support component 3 is provided with a card member 241 that cooperates with the card groove 381; the card groove 381 and the card member 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.

[0048] In some more specific embodiments, Figure 8 and Figure 9 As shown, a clamping piece 241 is provided on the groove wall, and a clamping groove 381 cooperating with the clamping piece 241 is provided on the side surface of the support assembly 3 .

[0049] It is understood that, in practice, the support assembly 3 is pressed so that it enters the groove 24 under the guidance of the sidewall of the groove 24; when the latching slot 381 is aligned with the latching member 241, the latching member 241 automatically engages within the latching slot 381, thereby achieving a fixed connection between the support assembly 3 and the sidewall of the groove 24. This design not only ensures stable and reliable installation of the support assembly 3, but also simplifies the installation process, effectively improves installation efficiency, and achieves a balance between stability and installation convenience.

[0050] In a more specific embodiment, Figure 7 and Figure 9 As shown, the second end face 33 of the support assembly 3 is provided with a protrusion 38, and the side of the protrusion 38 is provided with a clamping member 241 or a clamping groove 381 that cooperates with the groove, and the groove wall is provided with a guide groove 39 that cooperates with the protrusion 38. The clamping member 241 or the clamping groove 381 of the groove wall is set in the groove 24, and the guide groove 39 is used to guide the protrusion 38 into the groove 24 so that the clamping member 241 and the clamping groove 381 are smoothly aligned.

[0051] It is understood that, in a specific implementation, the guide groove 39 guides the protrusion 38 into the guide groove 39, and the clamping member 241 or the clamping groove 381 of the groove wall is disposed within the groove 24, which assists in guiding the protrusion 38 into the groove 24 so that the clamping member 241 and the clamping groove 381 are smoothly aligned. The guide groove 39 serves to increase the contact area between the guide groove 39 and the protrusion 38, thereby enabling the clamping member 241 to be quickly and accurately aligned with the clamping groove 381 and further ensuring that the protrusion 38 of the support assembly 3 is not easily displaced or loosened within the groove, thereby maintaining a strong and stable structure.

[0052] In a more specific embodiment, the groove wall has a clamping member 241, such as Figure 8As shown, the side of the protrusion 38 is provided with a slot 381 that is connected to the groove wall. The end of the clip 241 close to the groove 24 is provided with a transition slope 2411. The end of the clip 241 away from the groove 24 is a flat surface 2412. The protrusion 38 is elastic. The transition slope 2411 is used to guide the protrusion 38 to shrink away from the groove wall of the groove 24. When the clip 241 is inserted into the slot 381, the protrusion 38 is expanded toward the groove wall of the groove 24. The groove wall on one side of the slot 381 is connected to the clip. The flat surface 2412 of 241 abuts against each other, so that the card slot 381 tightly holds the card part 241. At the same time, a step is provided on the groove wall near the groove mouth of the groove 24, and an extension is provided on both sides of the support member. One end face of the extension abuts against the step. The step of the groove wall of the groove 24 is used to limit the movement of the support component 3 close to the bottom of the groove 24, and the flat surface 2412 of the card part 241 on the groove wall of the groove 24 is used to limit the movement of the support component 3 away from the bottom of the groove 24, thereby realizing a fixed connection between the support component 3 and the groove wall of the guide groove 39.

[0053] In a more specific embodiment, Figure 4 and Figure 7 As shown, the driven part 13 includes a slave rotating member 131, which is located on one side of the transmission shaft 12. The support assembly 3 is symmetrically provided with protrusions 38 on both sides. The slave rotating member 131 is distributed between the protrusions 38 on both sides. The power part includes a main rotating member 211. The main rotating member 211 is connected to the slave rotating member 131 to control the slave 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, thereby realizing the back and forth rotation of the hair implantation part 11.

[0054] It is understood that, in practice, by positioning the slave rotating member 131 between the protruding members 38, not only can the installation range of the slave rotating member 131 be effectively limited, thereby significantly improving the installation efficiency of the slave rotating member 131 and the main rotating member 211, but the protruding members 38 can also be used to limit the maximum range of movement of the slave rotating member 131, thus providing good protection. This design can prevent the slave rotating member 131 from swinging out of control due to excessive rotation angles, thereby preventing accidents involving the slave rotating member 131. Without this design, once a problem occurs, it may be possible to simply replace or repair the motor, but now the equipment must be disassembled to adjust the position structure of the slave rotating member 131, increasing the maintenance steps.

[0055] It should be noted that the limiting angle of protrusion 38 is set relatively large. Under normal operating conditions, it is not necessary to rely on it to control the angle. Simply adjusting the rotation angle of the motor can accurately control the swing angle, preventing the slave rotating member 131 from colliding with the protrusion 38 and reducing noise. The main function of protrusion 38 is to serve as a preventive mechanism to prevent the motor from causing the rotation angle of the slave rotating member or the main rotating member to lose control.

[0056] In a more specific embodiment, Figure 3 and Figure 4 As shown, slave rotating members 131 are provided on opposite sides of the driven portion 13, and protruding members 38 are provided on opposite sides of the supporting portion. The slave rotating members 131 on both sides are located between the protruding members 38 on both sides. When the slave rotating members 131 and the protruding members 38 abut against each other to cause a limited collision, the slave rotating members 131 on both sides abut against different protruding members 38 respectively, thereby improving the balance and stability during the abutment.

[0057] In a more specific embodiment, Figure 3 and Figure 4 As shown, the power unit includes a rotating shaft 21, and a main rotating member 211 is arranged on one side of the end of the rotating shaft 21, and 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 slave rotating members 131, and the main rotating member 211 is embedded in the recess 132 between the two slave rotating members 131; or the rotating shaft 21 is connected to the two main rotating members 211, and the slave rotating member 131 is embedded in the recess 132 between the two main rotating members 211; the recess 132 is cooperated with the slave rotating member 131 or the main rotating member 211 to realize that when the main rotating member 211 rotates back and forth around the center line of the rotating shaft 21, it drives the slave rotating member 131 to rotate back and forth around the center line of the transmission shaft 12.

[0058] It can be understood that, in a specific implementation, the transmission between the slave rotating member 131 and the main rotating member 211 is realized through the recess 132, and only the side of the slave rotating member 131 abuts against the side wall of the recess 132, or only the side of the main rotating member 211 abuts against the side wall of the recess 132. Fewer contact points are required when the main rotating member 211 and the slave rotating member 131 rotate, thereby reducing the noise generated by collision friction.

[0059] In a more specific embodiment, the main rotating member 211 and the slave rotating member 131 are arranged obliquely and coplanar, and the contact portion between the main rotating member 211 and the slave rotating member 131 is a convex arc surface.

[0060] It is understood that, in practice, the inclined arrangement of the main rotating member 211 and the slave rotating member 131, in the same plane, allows them to overlap in the vertical transmission direction. This not only saves three-dimensional space, but also achieves linear contact by forming convex arc surfaces where they contact each other. The inclined contact method provides a high load-bearing capacity, while the progressive contact characteristics of the convex arc surface reduce backlash, reduce collision noise, and reduce stress, effectively improving transmission stability.

[0061] It should be noted that the size and shape of the arc surface directly determines the contact point of the bristle head 1 from the rotating member 131 when it is in operation with the main rotating member 211. To ensure that the rotating shaft 21 drives the bristle head 1 to move, the main rotating member 211 of the present embodiment can maintain good arc surface contact with the slave rotating member 131 at different angles, achieving close cooperation between the two, effectively avoiding excessive gap between the slave rotating member 131 and the main rotating member 211 during rotation. Once the gap exceeds the standard, the two main rotating members 211 and the slave rotating member 131 form an impact movement, which in turn causes significant noise. By allowing the main rotating member 211 of the rotating shaft 21 to be in arc surface contact with the slave rotating member 131 of the bristle head 1, the operation process can be kept light and smooth, effectively avoiding the noise problem caused by impact.

[0062] In a more specific embodiment, the main rotating member 211 and the slave rotating member 131 are arranged at an angle and in the same plane 2412, the part where they contact each other is a convex arc surface, and both use tapered teeth. The slave rotating member 131 includes two tapered teeth, and the gap between the two tapered teeth forms a recess 132. When the motor drives the rotating shaft 21 to make an angular deflection, the transmission shaft 12 will also make a deflection movement synchronously. The main rotating member 211 on the rotating shaft 21 and the recess 132 of the slave rotating member on the bristle head 1 are matched by tapered tooth curved surfaces to achieve transmission. This matching method can make the movement more stable, better fit, and less noisy. At the same time, the use of tapered teeth for transmission: its special structure makes it have high transmission efficiency, smaller meshing angle, and less energy loss compared to straight teeth; strong bearing capacity, suitable for high-load application scenarios; the meshing curved surface is a tapered surface, there is no jumping or impact during transmission, and the stability and reliability are good; it can realize the adjustment of different transmission ratios, and has strong adaptability; the transmission system structure is compact, occupies small space, and is suitable for mechanical design with limited space; it works reliably, has long service life, and has low transmission noise.

[0063] It should be noted that the deflection angle of the bristle head 1 of the present embodiment is not 360°, but about 55°. Through simulation of the brushing test, it is verified that the best cleaning effect can be achieved when the brushing angle is about 30°. Reserving more swing angle interval is to meet the needs of different consumers.

[0064] In a more specific embodiment, as shown in Figure 8 and Figure 10 the recess 24 and the side of the driven part 13 away from the bristle part 11 is provided with a base 25, which is used to limit the movement of the driven part 13 towards the bottom of the recess 24. The base 25 is provided with a through hole 251 towards the rotating shaft 21. The brush handle 2 further comprises a receiving shaft 22, one end of which is fixedly connected with the end of the rotating shaft 21, and the other end is rotatably connected with the through hole 251. The diameter of the receiving shaft 22 is smaller than that of the rotating shaft 21.

[0065] It is understood that, in practice, the diameter of the receiving shaft 22 is smaller than that of the rotating shaft 21, thereby 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 varies, and the base 25 is used to further limit the downward pressure of the implant head 1, which could cause the secondary rotating member 131 to damage the main rotating member 211 of the rotating shaft 21.

[0066] In a more specific embodiment, the brush handle 2 includes a handle shaft 23, which is used to insert the handle so that the motor output shaft of the handle is connected to the rotating shaft 21, and the rotating shaft 21 is rotatably connected to the handle shaft 23, so that the center lines of the receiving shaft 22, the rotating shaft 21, the outer shell of the brush handle 2, and the handle shaft 23 are collinear.

[0067] It is understandable that, in specific implementation, by aligning the center lines of the receiving shaft 22, the rotating shaft 21, the handle motor output shaft, and the outer shell of the brush handle 2, this design can greatly reduce abnormal phenomena such as movement when the handle motor drives the rotating shaft 21 to operate, allowing the rotating shaft 21 to operate more smoothly, with less torque loss, ensuring efficient power transmission, and reducing noise. During the operation of the hair transplanting head 1, the power transmission of the above-mentioned main components always rotates back and forth around the center line. According to centrifugal force analysis, this design minimizes the centrifugal force generated during operation, which not only reduces energy consumption and transmits the motor power to the hair transplanting head 1 to a greater extent, achieving efficient energy transmission, but also avoids product instability due to excessive centrifugal force, thereby reducing the abnormal swing amplitude during operation, further ensuring stable operation and reducing noise.

[0068] The steps for assembling the components of a toothbrush head in this embodiment include:

[0069] The hair transplanting head 1 is inserted into the circular hole 34 of the support assembly 3 from the notch 31 of the support assembly 3 through its transmission shaft 12 to form an assembly, and the assembly is pressed into the groove 24 of the brush handle 2. The support assembly 3 is fixed to the side wall of the groove 24 through the cooperation of the clamping member 241 and the clamping groove 381, so that the hair transplanting head 1 is installed on the brush handle 2 through the support assembly 3. Subsequently, the receiving shaft 22 is fixed to one end of the rotating shaft 21, and 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 member 211 is engaged with the slave rotating member 131. The other end of the rotating shaft 21 is connected to the motor output shaft of the handle through the handle shaft 23, and the handle shaft 23 is fixed to the end of the brush handle 2.

[0070] When in use, the output shaft of the handle motor rotates to drive the rotating shaft 21 and the receiving shaft 22 to rotate, and the rotation of the main rotating member 211 with the rotating shaft 21 drives the rotating member 131 to rotate, and then drives the transmission shaft 12 and the hair implantation part 11 connected to the rotating member 131 to rotate.

[0071] In summary, the toothbrush head provided by the embodiment of the present invention has the advantages of simple assembly structure, high transmission efficiency and low noise.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A toothbrush head, characterized in that: include: A hair transplant head, a support assembly and a brush handle; a power unit is provided in the brush handle, the power unit is connected to the hair transplant head, and the power unit is used to control the hair transplant head to rotate in the support assembly; The hair implantation head includes a hair implantation portion, a transmission shaft, and a driven portion connected to the power portion, one end of the transmission shaft is fixedly connected to the hair implantation portion, and the other end of the transmission shaft is fixedly connected to the driven portion; 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 a bevel gear structure. 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 assembly is provided with a notch, and the notch is used for passing the transmission shaft so that the transmission shaft is clamped into the support assembly and rotatably connected to the support assembly; the first end face of the support assembly abuts against the hair-planting part, and the second end face of the support assembly abuts against the driven part. The support assembly is fixedly connected to one end of the brush handle.

2. A toothbrush head according to claim 1, characterized in that: A circular hole is provided in the middle of the support assembly, the circular hole is used to embed the transmission shaft and fit with the outer surface of the transmission shaft, and the notch is connected to the circular hole; The width of the notch is smaller than the diameter of the transmission shaft; a slot connected to the circular hole is provided on the side of the circular hole away from the notch, and the slot is used to assist the notch width to increase when the transmission shaft passes through the notch, and to assist the notch width to recover when the transmission shaft leaves the notch and is embedded in the circular hole.

3. A toothbrush head according to claim 2, characterized in that: A first protrusion is provided between the first end surface and the hair-implanted portion, and the first protrusion is provided on the first end surface or the hair-implanted portion. A second protrusion is provided between the second end surface and the driven portion, and the second protrusion is provided on the second end surface or the driven portion. The first protrusion and the second protrusion are respectively used to reduce the friction area between the supporting assembly and the hair-implanted portion and the driven portion.

4. A toothbrush head according to claim 3, characterized in that: The brush handle is provided with a groove, the groove wall of which is connected to the side of the support assembly; the groove wall is provided with a clamping piece, and the side of the support assembly is provided with a clamping groove that cooperates with the clamping piece; or the groove wall is provided with a clamping groove, and the side of the support assembly is provided with a clamping piece that cooperates with the clamping groove; the clamping groove and the clamping piece are used to press the support assembly into the groove of the brush handle so that the side of the support assembly 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 assembly is provided with a protrusion, and the side surface of the protrusion is provided with a clamping piece or a clamping groove connected to the groove wall, and the groove wall is provided with a guide groove that cooperates with the protrusion. The clamping piece or the clamping groove of the groove wall is set in the groove, and the guide groove is used to guide the protrusion into the groove so that the clamping piece and the clamping groove are smoothly aligned.

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

7. A toothbrush head according to claim 6, characterized in that: The power unit includes a rotating shaft, the main rotating member is arranged on one side of the end of the rotating shaft, and the center line of the rotating shaft is perpendicular to the center line of the transmission shaft; the transmission shaft is connected to the two slave rotating members, and the main rotating member is embedded in the recess between the two slave rotating members; or the rotating shaft is connected to the two main rotating members, and the slave rotating member is embedded in the recess between the two main rotating members; the recess is cooperated with the slave rotating member or the main rotating member to realize that when the main rotating member rotates back and forth around the center line of the rotating shaft, it drives the slave rotating member to rotate back and forth around the center line of the transmission shaft.

8. A toothbrush head according to claim 7, characterized in that: The main rotating member and the slave rotating member are arranged obliquely and in the same plane, and the contact portion between the main rotating member and the slave rotating member 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 hair-planting part. The base is used to limit the movement of the driven part toward the bottom of the groove. The base is provided with a through hole toward 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 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 receiving shaft, the rotating shaft, the outer shell of the brush handle, and the center line of the handle shaft are collinear.

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