Electric toothbrush head and electric toothbrush

Abstract

The electric toothbrush head and the electric toothbrush provided by the embodiment of the application relate to the technical field of electric toothbrushes, wherein the electric toothbrush head comprises: a shell having a mounting cavity and a containing cavity, the containing cavity being in communication with the mounting cavity; a brush head assembly comprising a support and a bristle implanting head, the support being mounted in the mounting cavity, the support having a matching hole, the bristle implanting head comprising a rotating part and a driving part, the rotating part being rotatably matched with the matching hole, and the driving part being eccentrically arranged with the rotating part; and a driving assembly comprising an inner shaft and an elastic piece, the inner shaft being movably arranged in the containing cavity, the other end of the elastic piece being connected with the inner shaft, and the elastic piece being used for driving the inner shaft to move in a direction away from the driving part. The embodiment of the application can simplify the structural design of the brush head assembly, is beneficial to simplifying the assembly process of the electric toothbrush head, and reduces the cost of the electric toothbrush head.

Description

Technical Field

[0001] This application relates to the field of electric toothbrush technology, and more particularly to an electric toothbrush head and an electric toothbrush. Background Technology

[0002] Related technology describes an electric toothbrush head with left and right rotation function. The brush head internally includes a brush, a rotor for driving the brush, and a pull rod eccentrically mounted on the rotor for pulling the rotor to rotate. A pressure plate is movably sleeved on the rotor surface, and the pressure plate has protrusions that engage with the inside of the brush head to confine the rotor within the brush head. This brush head, by configuring the brush, pressure plate, rotor, and locking block, utilizes the pressure plate to confine the rotor inside the brush head, allowing the rotor to rotate stably within the brush head. However, this brush head has a complex structure, a relatively cumbersome assembly process, and a high cost. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an electric toothbrush head and an electric toothbrush, which can effectively simplify the assembly process of the electric toothbrush head and reduce the cost of the electric toothbrush head.

[0004] An embodiment of the first aspect of this application provides an electric toothbrush head, comprising:

[0005] The housing has a mounting cavity and a receiving cavity, the receiving cavity being in communication with the mounting cavity;

[0006] A brush head assembly includes a bracket and a bristle implantation head. The bracket is installed in the mounting cavity and has a mating hole. The bristle implantation head includes a rotating part and a driving part. The rotating part is rotatably engaged with the mating hole, and the driving part is eccentrically disposed with respect to the rotating part.

[0007] A drive assembly includes an inner shaft and an elastic element. The inner shaft is movably disposed within the accommodating cavity. One end of the inner shaft is rotatably connected to the drive unit, and the other end of the inner shaft is used to cooperate with a main shaft. The elastic element is disposed within the accommodating cavity. One end of the elastic element is connected to the inner wall of the housing, and the other end of the elastic element is connected to the inner shaft. The elastic element is used to drive the inner shaft to move away from the drive unit.

[0008] Furthermore, the tufting head includes a tufting disc and a limiting part. The tufting disc is connected to one end of the rotating part, and the limiting part is disposed at the other end of the rotating shaft. The bracket has a mating part, which is disposed between the tufting disc and the limiting part, wherein the mating part is provided with the mating hole.

[0009] Furthermore, the bracket includes an abutment portion disposed on the side of the mating portion near the hair-planting disc, and the abutment portion protrudes from the surface of the mating portion, wherein the cross-sectional area of ​​the abutment portion is smaller than the area of ​​the end face of the mating portion near the hair-planting disc.

[0010] Furthermore, along the radial direction of the mating hole, the distance between the mating part and the hair-planting disc gradually decreases.

[0011] Furthermore, the side of the bracket is provided with a notch, which communicates with the mating hole, and the notch is used to allow the rotating part to pass through and move into the mating hole.

[0012] Furthermore, the inner wall of the housing is provided with a support portion, the elastic element abuts against the support portion, the inner shaft is provided with a first locking portion, the elastic element has a second locking portion, the second locking portion cooperates with the first locking portion, and the second locking portion is relatively fixed to the first locking portion.

[0013] Furthermore, the elastic element is a spring sheet, the first locking part is a first locking groove, and the end of the spring sheet is bent to form a second locking part, which is inserted into the first locking groove. The spring sheet has a folded part, which can extend and retract along the axial direction of the inner shaft.

[0014] Furthermore, the elastic element is a spring, one end of the spring abuts against the support portion, and the other end of the spring forms a second locking portion. The first locking portion is a second locking groove, and the second locking portion is locked in the second locking groove.

[0015] Furthermore, the end of the spring on the side away from the drive unit protrudes from the end of the inner shaft and is used to abut against the main shaft.

[0016] An embodiment of the second aspect of this application provides an electric toothbrush, including a handle and an electric toothbrush head as described above. The handle is connected to the housing, and a main shaft is disposed inside the handle. The main shaft is used to drive the inner shaft to move along its own axial direction toward the drive unit.

[0017] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects:

[0018] In the electric toothbrush head and electric toothbrush provided in this application embodiment, the bristle implantation head is rotatably mounted in the mounting cavity of the housing via a bracket. The bristle implantation head rotatably engages with the bracket's mating hole via a rotating part. This allows for reciprocating rotation of the bristle implantation head, simplifying the brush head assembly structure, streamlining the assembly process, and reducing the cost of the electric toothbrush head. Furthermore, after the main shaft lifts the inner shaft, the inner shaft can be driven back to its original position via an elastic element. Thus, the main shaft does not need to be fixedly connected to the inner shaft of the electric toothbrush head to drive the bristle implantation head to reciprocate, facilitating toothbrush head replacement and reducing user operating costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of an electric toothbrush head provided in one embodiment of this application;

[0021] Figure 2 This is an exploded structural diagram of an electric toothbrush head provided in one embodiment of this application;

[0022] Figure 3 This is a front view of an electric toothbrush head according to an embodiment of this application. In the figure, ω represents the rotation direction of the bristle head.

[0023] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure at position AA in the middle;

[0024] Figure 5 for Figure 4 A partially enlarged structural diagram of section B;

[0025] Figure 6 This is a cross-sectional structural diagram of the housing in an electric toothbrush head according to one embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the assembly structure of the inner shaft and the elastic element in an electric toothbrush head according to an embodiment of this application, wherein the elastic element is a spring sheet;

[0027] Figure 8 for Figure 7 The explosive structure concept of the inner shaft and elastic element;

[0028] Figure 9This is a schematic diagram of the assembly structure of the inner shaft and the elastic element in an electric toothbrush head according to an embodiment of this application, wherein the elastic element is a spring;

[0029] Figure 10 for Figure 9 Exploded view of the inner shaft and elastic element.

[0030] Figure label:

[0031] 100. Housing; 110. Mounting cavity; 120. Receiving cavity; 130. Support; 140. Guide;

[0032] 200. Brush head assembly; 210. Support; 211. Mating hole; 212. Notch; 213. Mating part; 2131. First inclined surface; 214. Abutting part; 220. Bristle-planting head; 221. Rotating part; 222. Drive part; 223. Bristle-planting disc; 224. Limiting part;

[0033] 300, Drive assembly; 310, Inner shaft; 311, First connecting end; 312, Second connecting end; 3121, Connecting inclined surface; 3122, Accommodating space; 313a, First slot; 313b, Second slot; 314, Protrusion; 315, Accommodating groove; 320, Elastic element; 321, First abutting end; 322a, Second locking part; 322b, Second locking part; 323, Folded line part; 324, Second abutting end; 325, Third abutting end. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] See Figures 1 to 4 As shown, an embodiment of the first aspect of this application discloses an electric toothbrush head, including a housing 100, a brush head assembly 200, and a drive assembly 300.

[0036] For details, please continue reading. Figures 1 to 4The housing 100 has a mounting cavity 110 and a receiving cavity 120, with the receiving cavity 120 communicating with the mounting cavity 110; the brush head assembly 200 includes a bracket 210 and a bristle implantation head 220, the bracket 210 being installed in the mounting cavity 110 and having a mating hole 211, the bristle implantation head 220 including a rotating part 221 and a driving part 222, the rotating part 221 being rotatably engaged with the mating hole 211, and the driving part 222 being eccentrically disposed with respect to the rotating part 221; the drive assembly 300 includes The inner shaft 310 and the elastic element 320 are provided. The inner shaft 310 is movably disposed in the accommodating cavity 120. One end of the inner shaft 310 is rotatably connected to the driving part 222, and the other end of the inner shaft 310 is used to cooperate with the main shaft. The elastic element 320 is disposed in the accommodating cavity 120, and one end of the elastic element 320 is connected to the inner wall of the housing 100. The other end of the elastic element 320 is connected to the inner shaft 310. The elastic element 320 is used to drive the inner shaft 310 to move away from the driving part 222.

[0037] The main shaft is used to drive the inner shaft 310 to move along the axial direction of the inner shaft 310 and toward the side closer to the drive unit 222, such as... Figure 4 As shown in the Z direction. When the inner shaft 310 moves along its own axial direction toward the side closer to the drive unit 222, the elastic element 320 is pushed and compressed by the inner shaft 310. When the main shaft moves toward the side away from the drive unit 222, the elastic element 320 can stop the inner shaft 310 and push the inner shaft 310 toward the side away from the rotating unit 221. In this way, by using the main shaft to push the inner shaft 310 to move axially, and in conjunction with the action of the elastic element 320, the inner shaft 310 can be made to reciprocate along its own axial direction, thereby driving the tufting head 220 to oscillate back and forth around the rotating axis.

[0038] In the electric toothbrush head provided in this embodiment, the bristle implantation head 220 is rotatably mounted in the mounting cavity 110 of the housing 100 via a bracket 210. The bristle implantation head 220 is rotatably engaged with the mating hole 211 of the bracket 210 via a rotating part 221. This allows the bristle implantation head 220 to reciprocate, simplifying the structural design of the brush head assembly 200, simplifying the assembly process, and reducing the cost of the electric toothbrush head. Simultaneously, the inner shaft 310 can be reset via the elastic element 320 after the main shaft is lifted. Thus, the main shaft does not need to be fixedly connected to the inner shaft 310 of the electric toothbrush head to drive the bristle implantation head 220 to reciprocate, facilitating the replacement of the electric toothbrush head and reducing user operating costs.

[0039] In some embodiments of this application, see Figures 2 to 4The tufting head 220 includes a tufting disc 223 and a limiting part 224. The tufting disc 223 is connected to one end of the rotating part 221, and the limiting part 224 is disposed at the other end of the rotating shaft. The bracket 210 has a mating part 213, which is provided with a mating hole 211. The mating part 213 is disposed between the tufting disc 223 and the limiting part 224. Specifically, the size of the limiting part 224 is larger than the size of the mating hole 211, so that the mating part 213 can be restricted between the tufting disc 223 and the limiting part 224. In this way, the rotating part 221 can be restricted to move along its own axial direction, preventing the rotating part 221 from disengaging from the mating hole 211.

[0040] It is worth understanding that the limiting part 224 and the rotating part 221 can be a single structure or a structure obtained by assembly. No limitation is made here.

[0041] In one embodiment, see Figure 2 The side of the bracket 210 is provided with a notch 212, which communicates with the mating hole 211. The notch 212 is used to allow the rotating part 221 to pass through and move into the mating hole 211. In this way, the rotating part 221 of the tufting head 220 can be inserted into the mating hole 211 from the notch 212 on the side of the bracket 210.

[0042] Furthermore, in order to prevent the rotating part 221 from sliding out of the notch 212, the minimum opening width of the notch 212 is set to be smaller than the diameter of the rotating part 221.

[0043] Furthermore, the width of the notch 212 gradually increases along the direction away from the rotating part 221. That is, the opening width of the notch 212 on the side closer to the mating hole 211 is smaller than the opening width on the side farther from the mating hole 211. This increases the contact area between the mating hole 211 and the rotating part 221, reducing the probability of the rotating part 221 jumping outwards towards the notch 212, thus helping to reduce radial runout when the tufting head 220 rotates and reducing vibration. Simultaneously, the gradual increase in the opening width of the notch 212 along the direction away from the rotating part 221 facilitates alignment of the rotating part 221 with the opening of the notch 212 during assembly, aiding in the assembly of the rotating part 221 into the mating hole 211 and improving assembly efficiency.

[0044] In this embodiment, the opening of the notch 212 is less than a quarter of a circumference. That is, the opening of the notch 212 is much smaller than the diameter of the cross-sectional profile of the rotating part 221. After the rotating part 221 is inserted into the mating hole 211, the contact area between the mating hole 211 and the rotating part 221 can be increased, which can reduce the probability that the rotating part 221 will disengage from the mating hole 211 at the notch 212. In this way, it is beneficial to reduce the radial runout of the tufting head 220, thereby ensuring the rotational stability of the tufting head 220.

[0045] It is worth understanding that in the above embodiment, the bracket 210 has a certain elasticity. During the process of the rotating part 221 entering the mating hole 211 from the notch 212, the bracket 210 undergoes elastic deformation, so that the rotating part 221 enters the mating hole 211 from the notch 212. After the rotating part 221 passes through the notch 212, the bracket 210 can quickly recover and will not affect the reciprocating circumferential swing of the tufting head 220.

[0046] Further, see Figure 4 and Figure 5 The housing 100 is provided with a mounting cavity 110, and the outer contour of the bracket 210 is designed to match the cavity wall of the mounting cavity 110. Thus, the engagement of the bracket 210 with the mounting cavity 110 prevents deformation of the bracket 210 that could affect the rotation of the tufting head 220. Simultaneously, the rotating part 221 rotatably engages with the mating hole 211, and the gap between the rotating part 221 and the mating hole 211 is small, meaning the bracket 210 cannot deform into the mating hole 211. Therefore, this embodiment, through the combined action of the mounting cavity 110 and the rotating part 221, prevents deformation of the bracket 210, helping to ensure the stability of the rotation of the tufting head 220.

[0047] In some embodiments of this application, see Figure 2 and Figure 5 The support 210 includes an abutment portion 214, which is disposed on the side of the mating portion 213 near the tufting plate 223. The abutment portion 214 protrudes from the surface of the mating portion 213, and the cross-sectional area of ​​the abutment portion 214 is smaller than the area of ​​the end face of the mating portion 213 near the tufting plate 223. The abutment portion 214 protruding from the surface of the mating portion 213 reduces the contact area between the tufting plate 223 and the support 210, which helps to reduce the noise when the tufting head 220 rotates.

[0048] To further reduce the probability of contact between the tufting disc 223 and the support 210, and thus reduce noise, in this embodiment, please refer to... Figure 5 Along the radial direction of the mating hole 211, the distance between the mating part 213 and the tufting disc 223 gradually decreases. That is, the mating part 213 is provided with a first inclined surface 2131 near the mating hole 211. Among the various positions on the first inclined surface 2131, the closer to the mating hole 211, the greater the distance between the position and the tufting disc 223. In this way, the probability of this part contacting the tufting disc 223 can be reduced, which helps to reduce the vibration and noise when the tufting head 220 rotates, and helps to optimize the user experience.

[0049] In some embodiments of this application, see Figure 2 and Figure 4The inner shaft 310 includes a first connecting end 311 and a second connecting end. The first connecting end 311 is used to connect with the drive unit 222, and the second connecting end 312 is used to abut against the main shaft so as to drive the inner shaft 310 to move through the main shaft.

[0050] Further, see Figure 2 and Figure 4 The second connecting end 312 includes a connecting body and a guide structure disposed on the outer periphery of the connecting body. The guide structure protrudes from the end face of the connecting body. As shown in the figure, the guide structure and the end face of the connecting body enclose a receiving space 3122 for cooperating with the main shaft, for at least partially accommodating the main shaft, so as to facilitate the main shaft to drive the inner shaft 310 to move.

[0051] The guide structure can be a solid structure continuously distributed in the circumferential direction of the connecting body, or it can be a structure composed of multiple protrusions spaced apart in the circumferential direction of the connecting body.

[0052] In this embodiment, see Figure 2 and Figure 4 The guide structure is composed of multiple protrusions spaced apart in the circumferential direction of the connecting body, and there are three protrusions.

[0053] In the above embodiment, in order to allow the electric toothbrush head to be detachably mounted on the handle of the electric toothbrush, the main shaft and the second connecting end 312 of the inner shaft 310 are configured to be non-fixedly connected. That is, during the reciprocating rotation of the bristle head 220, the main shaft and the second connecting end 312 may briefly separate and then re-engage. As a result, vibration and noise are easily generated between the main shaft and the second connecting end 312.

[0054] To address the aforementioned issues, in this embodiment, see... Figure 2 and Figure 4 The guide structure is provided with a connecting inclined surface 3121 for contacting the main shaft to reduce motion noise.

[0055] During the process of the inner shaft 310 driving the tufting head 220 to reciprocate in a circumferential direction, the elastic element 320 will vibrate at a high frequency, which may easily lead to resonance, uncertain deformation or displacement, thereby affecting the force transmission efficiency and working stability of the elastic element 320.

[0056] In some embodiments of this application, see Figure 4 and Figure 6The inner wall of the housing 100 is provided with a support portion 130, and one end of the elastic member 320 abuts against the support portion 130. The inner shaft 310 is provided with a first locking portion, and the elastic member 320 has a second locking portion. The second locking portion cooperates with the first locking portion, and the second locking portion is relatively fixed to the first locking portion. In this embodiment, the elastic member 320 is relatively fixed to the first locking portion of the inner shaft 310 through the second locking portion, so that a part of the elastic member 320 is fixedly connected to the inner shaft 310. This can reduce the occurrence of resonance, uncertain deformation or displacement of the elastic member 320 under high-frequency vibration, improve the force transmission efficiency and working stability of the elastic member 320, and also help reduce working noise.

[0057] In this embodiment, the elastic element 320 is located between the support portion 130 and the first locking portion. When the inner shaft 310 moves toward the side closer to the drive portion 222, the elastic element 320 is compressed. When the main shaft moves in the opposite direction, the elastic potential energy stored in the elastic element 320 is released and pushes the inner shaft 310 to move in the opposite direction.

[0058] Further, see Figure 6 A guide portion 140 is provided on one side of the support portion 130. The guide portion 140 has an inclined surface for guiding the elastic member 320 to move to the support portion 130.

[0059] In one embodiment, see Figures 6 to 8 The elastic element 320 is a spring sheet, the first locking part is a first locking groove 313a, the front end of the spring sheet is a first abutting end 321, which is used to abut against the support part 130, and the end of the spring sheet is bent to form a second locking part 322a, which is inserted into the first locking groove 313a.

[0060] It is worth understanding that a shrapnel includes the shrapnel body, which can be a continuous S-shape, W-shape, or other shape. The material of the shrapnel can be stainless steel, manganese steel, etc.

[0061] In this embodiment, see Figure 7 and Figure 8 The spring has a zigzag portion 323, which can extend and retract along the axial direction of the inner shaft 310. By compressing the zigzag portion 323, elastic potential energy can be stored within it; when the external force acting on the zigzag portion 323 is removed, the zigzag portion 323 releases the elastic potential energy and elongates.

[0062] In the above embodiments, see Figure 7 and Figure 8The inner shaft 310 is provided with a receiving groove 315, which is located on one side of the first slot 313a. The receiving groove 315 is used to receive the zigzag portion 323, which can extend and retract within the receiving groove 315. In addition to avoiding interference between the zigzag portion 323 and the inner shaft 310, the receiving groove 315 also provides a limit and guide for the zigzag portion 323, preventing uncertain deformation or displacement of the zigzag portion 323 during high-frequency vibration, thus improving the motion stability of the inner shaft 310.

[0063] In this embodiment, see Figure 7 and Figure 8 The inner shaft 310 has a groove on one side corresponding to the second connecting end 312, and a protrusion 314 is provided in the groove. The protrusion 314 divides the groove into a receiving groove 315 and a first slot 313a.

[0064] In one embodiment of this application, see Figure 9 and Figure 10 The elastic element 320 is a spring, which is sleeved on the outer circumference of the inner shaft. Specifically, one end of the spring is a second abutment end 324, which is used to abut against the support part 130. The other end of the spring forms a second locking part 322b. The first locking part is a second locking groove 313b. The second locking part 322b is locked in the second locking groove 313b so that the spring is fixedly connected to the inner shaft 310.

[0065] It is worth noting that the spring can be a conical spring, a straight spring, or other types of springs, and no specific limitation is made here.

[0066] In this embodiment, see Figure 9 and Figure 10 The end of the spring away from the drive unit 222 is a third abutment end 325. The third abutment end 325 protrudes from the end of the inner shaft 310 and is used to abut against the main shaft.

[0067] In this embodiment, the spring is specifically a conical spring, which includes a wide conical spring coil and a close conical spring coil. The close conical spring coil is located near the third abutment end 325. The helical spacing of the wide conical spring coil is greater than that of the close conical spring coil, meaning that the coils of the close conical spring coil are more densely packed than those of the wide conical spring coil. In practical applications, the close conical spring coil is used to contact the spindle. The power of the spindle drives the movement of the close conical spring coil, which in turn drives the movement of the inner shaft 310 fixed on the conical spring. The inner shaft 310 then transmits the power to the tufting head 220, causing the tufting head 220 to rotate circumferentially.

[0068] In one embodiment, assembling an electric toothbrush head includes the following steps:

[0069] Align the rotating part 221 of the bristle head 220 with the notch 212 on the side of the bracket 210, and insert the rotating part 221 into the mating hole 211 of the bracket 210 through the notch 212 to assemble it into a brush head assembly 200.

[0070] The elastic element 320 is installed on the inner shaft 310, and the inner shaft 310 and the elastic element 320 are installed together into the receiving cavity 120 of the housing 100, with one end of the inner shaft 310 extending to the mounting cavity 110 of the housing 100.

[0071] The brush head assembly 200 is installed in the mounting cavity 110, wherein the bracket 210 cooperates with the mounting cavity 110, and the drive part 222 of the bristle head 220 is connected to the inner shaft 310.

[0072] The rotating part 221 of the bristle implantation head 220 is inserted into the mating hole 211 through the notch 212 on the side of the bracket 210. The mating hole 211 and the rotating part 221 are used to position the bristle implantation head 220 in the cross section of the mating hole 211. At the same time, the bracket 210 is used to position the bristle implantation head 220 along the axial direction of the mating hole 211. Thus, by realizing the reciprocating rotation of the bristle implantation head 220 with the rotating part 221 as the axis of rotation, the assembly process of the electric toothbrush head is simplified and the cost of the electric toothbrush head is reduced.

[0073] An embodiment of the second aspect of this application discloses an electric toothbrush, including a handle and an electric toothbrush head. Specifically, a drive motor and the aforementioned main shaft are disposed within the handle. The output end of the drive motor is connected to the main shaft and is used to drive the main shaft to perform linear motion. The main shaft is used to drive the inner shaft 310 to move along the axial direction of the inner shaft 310, that is, the main shaft is used to drive the inner shaft 310 to move along the Z direction, such as... Figure 4 As shown.

[0074] In one embodiment, see Figures 2 to 5 The inner shaft 310 has a second connecting end 312, and the end of the main shaft abuts against the second connecting end 312. The main shaft moves along the Z direction, driving the inner shaft 310 to move along the Z direction. When the main shaft moves in the opposite direction of the Z direction, the inner shaft 310 also moves in the opposite direction of the Z direction under the action of the elastic element 320, until the main shaft pushes the inner shaft 310 to move in the positive direction of the Z direction again, and this process is repeated.

[0075] In the description of this application, 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 application 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 application.

[0076] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0077] In the description of this application, it should be noted that, unless otherwise expressly 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0078] 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.

[0079] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

Claims

1. An electric toothbrush head, characterized in that, include: The housing has a mounting cavity and a receiving cavity, the receiving cavity being in communication with the mounting cavity; A brush head assembly includes a bracket and a bristle implantation head. The bracket is installed in the mounting cavity and has a mating hole. The bristle implantation head includes a rotating part and a driving part. The rotating part is rotatably engaged with the mating hole, and the driving part is eccentrically disposed with respect to the rotating part. A drive assembly includes an inner shaft and an elastic element. The inner shaft is movably disposed within the accommodating cavity. One end of the inner shaft is rotatably connected to the drive unit, and the other end of the inner shaft is used to cooperate with a main shaft. The elastic element is disposed within the accommodating cavity. One end of the elastic element is connected to the inner wall of the housing, and the other end of the elastic element is connected to the inner shaft. The elastic element is used to drive the inner shaft to move away from the drive unit.

2. The electric toothbrush head according to claim 1, characterized in that, The tufting head includes a tufting disc and a limiting part. The tufting disc is connected to one end of the rotating part, and the limiting part is disposed at the other end of the rotating part. The bracket has a mating part, which is disposed between the tufting disc and the limiting part, wherein the mating part is provided with the mating hole.

3. The electric toothbrush head according to claim 2, characterized in that, The bracket includes an abutment portion disposed on the side of the mating portion near the hair-planting disc, and the abutment portion protrudes from the surface of the mating portion. The cross-sectional area of ​​the abutment portion is smaller than the area of ​​the end face of the mating portion near the hair-planting disc.

4. The electric toothbrush head according to claim 2, characterized in that, Along the radial direction of the mating hole, the distance between the mating part and the hair-planting disc gradually decreases.

5. The electric toothbrush head according to claim 1, characterized in that, The side of the bracket is provided with a notch, which communicates with the mating hole. The notch is used to allow the rotating part to pass through and move into the mating hole.

6. The electric toothbrush head according to any one of claims 1 to 5, characterized in that, The inner wall of the housing is provided with a support portion, the elastic element abuts against the support portion, the inner shaft is provided with a first locking portion, the elastic element has a second locking portion, the second locking portion cooperates with the first locking portion, and the second locking portion is relatively fixed to the first locking portion.

7. The electric toothbrush head according to claim 6, characterized in that, The elastic element is a spring sheet, the first locking part is a first locking groove, and the end of the spring sheet is bent to form a second locking part, which is inserted into the first locking groove. The spring sheet has a folded part, which can extend and retract along the axial direction of the inner shaft.

8. The electric toothbrush head according to claim 6, characterized in that, The elastic element is a spring, one end of which abuts against the support portion, and the other end of the spring forms a second locking portion. The first locking portion is a second locking groove, and the second locking portion is locked in the second locking groove.

9. The electric toothbrush head according to claim 8, characterized in that, The end of the spring on the side away from the drive unit protrudes from the end of the inner shaft and is used to abut against the main shaft.

10. An electric toothbrush, characterized in that, The device includes a handle and an electric toothbrush head as described in any one of claims 1 to 9, wherein the handle is connected to the housing, and a main shaft is provided inside the handle, the main shaft being used to drive the inner shaft to move along its own axial direction toward the drive unit.

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