Electric toothbrush head, electric toothbrush and assembling method

Abstract

The embodiment of the invention provides an electric toothbrush head, an electric toothbrush and an assembling method, and relates to the technical field of electric toothbrushes, and the electric toothbrush head comprises a shell, an electric toothbrush head, an electric toothbrush head body, an electric toothbrush head body and an electric toothbrush head body, the shell is provided with a mounting cavity and a containing cavity, and the containing cavity is communicated with the mounting cavity; the brush head assembly comprises a support and a bristle planting head, the support is installed in the installation cavity, the support is provided with a matching hole, the bristle planting head comprises a rotating part and a driving part, the rotating part is rotatably matched with the matching hole, and the driving part and the rotating part are eccentrically arranged; the driving assembly comprises an inner shaft and an elastic piece, the inner shaft is movably arranged in the containing cavity, the other end of the elastic piece is connected with the inner shaft, and the elastic piece is used for driving the inner shaft to move in the direction away from the driving part. The structural design of the brush head assembly can be simplified, the assembly process of the electric toothbrush head can be simplified, and the cost of the electric toothbrush head is reduced.

Description

Technical Field

[0001] This application relates to the field of electric toothbrush technology, and more particularly to an electric toothbrush head, an electric toothbrush, and an assembly method. 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. Summary of the Invention

[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, an electric toothbrush, and an assembly method, 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] Further, the support includes an abutting portion, which is arranged on the side of the fitting portion close to the bristle planting disc and protrudes from the surface of the fitting portion, and the cross-sectional area of the abutting portion is smaller than the area of the end face of the side of the fitting portion close to the bristle planting disc.

[0010] Further, the side of the support is provided with a notch, which is in communication with the fitting hole, and the notch is used for passing and moving the rotating portion into the fitting hole.

[0011] Further, the inner wall of the shell is provided with a supporting portion, the elastic member abuts against the supporting portion, the inner shaft is provided with a first clamping portion, the elastic member has a second clamping portion, the second clamping portion cooperates with the first clamping portion, and the second clamping portion is fixed opposite to the first clamping portion.

[0012] Further, the elastic member is a spring, one end of the spring abuts against the supporting portion, the other end of the spring is formed with the second clamping portion, the first clamping portion is a second clamping groove, and the second clamping portion is clamped in the second clamping groove.

[0013] Further, the elastic member is a spring, one end of the spring abuts against the supporting portion, the other end of the spring is formed with the second clamping portion, the first clamping portion is a second clamping groove, and the second clamping portion is clamped in the second clamping groove.

[0014] Further, the end of the side of the spring away from the driving portion protrudes from the end of the inner shaft and is used for abutting against the main shaft.

[0015] The second aspect of the present application provides an electric toothbrush, which includes a handle and an electric toothbrush head as described above, the handle is connected with the shell, the handle is provided with a main shaft, and the main shaft is used for driving the inner shaft to move along the axial direction of the main shaft and towards the driving portion.

[0016] The third aspect of the present application provides an assembling method of an electric toothbrush head, which is applied to an electric toothbrush head including a shell, a bristle planting head, a support, an inner shaft and an elastic member, and includes the following steps:

[0017] The rotating portion of the bristle planting head is aligned with the notch in the side of the support, and the rotating portion is clamped into the fitting hole of the support from the notch to assemble a brush head assembly;

[0018] The elastic member is installed on the inner shaft, the inner shaft and the elastic member are installed in the accommodating cavity of the shell, and one end of the inner shaft extends to the mounting cavity of the shell;

[0019] The brush head assembly is installed in the installation cavity, wherein the support is matched with the installation cavity, and the driving part of the bristle implanting head is connected with the inner shaft.

[0020] From the above technical solutions, the embodiments of the present application have at least the following beneficial effects:

[0021] In the electric toothbrush head, the electric toothbrush and the assembly method provided by the embodiments of the present application, the bristle implanting head is rotatably installed in the installation cavity of the shell through the support, wherein the bristle implanting head is rotatably matched with the matching hole of the support through the rotating part. In the case of realizing the reciprocating rotation of the bristle implanting head, the structure design of the brush head assembly can be simplified, the assembly process of the electric toothbrush head is facilitated, and the cost of the electric toothbrush head is reduced. Meanwhile, after the inner shaft is lifted by the main shaft, the inner shaft can be driven to reset by the elastic member. In this way, the main shaft does not need to be fixedly connected with the inner shaft of the electric toothbrush head, and the reciprocating rotation of the bristle implanting head can also be driven. The electric toothbrush head can be conveniently replaced, so as to reduce the use cost of the user. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 The overall structure schematic diagram of the electric toothbrush head provided by one embodiment of the present application is shown in the figure.

[0024] Figure 2 The exploded structure schematic diagram of the electric toothbrush head provided by one embodiment of the present application is shown in the figure.

[0025] Figure 3 The front view structure schematic diagram of the electric toothbrush head provided by one embodiment of the present application is shown in the figure, wherein ω represents the rotating direction of the bristle implanting head.

[0026] Figure 4 The Figure 3 The sectional structure schematic diagram of the A-A position in the figure is shown in the figure.

[0027] Figure 5 The Figure 4 The local enlarged structure schematic diagram of the B part in the figure is shown in the figure.

[0028] Figure 6 The sectional structure schematic diagram of the shell in the electric toothbrush head provided by one embodiment of the present application is shown in the figure.

[0029] Figure 7The assembly structure diagram of the inner shaft and the elastic piece in the electric toothbrush head provided by an embodiment of the present application is shown in the figure, wherein the elastic piece is a spring;

[0030] Figure 8 The assembly structure diagram of the inner shaft and the elastic piece in the electric toothbrush head provided by an embodiment of the present application is shown in the figure, wherein the elastic piece is a spring; Figure 7 The assembly structure diagram of the inner shaft and the elastic piece in the electric toothbrush head provided by an embodiment of the present application is shown in the figure, wherein the elastic piece is a spring;

[0031] Figure 9 The assembly structure diagram of the inner shaft and the elastic piece in the electric toothbrush head provided by an embodiment of the present application is shown in the figure, wherein the elastic piece is a spring;

[0032] Figure 10 The assembly structure diagram of the inner shaft and the elastic piece in the electric toothbrush head provided by an embodiment of the present application is shown in the figure, wherein the elastic piece is a spring; Figure 9 The assembly structure diagram of the inner shaft and the elastic piece in the electric toothbrush head provided by an embodiment of the present application is shown in the figure, wherein the elastic piece is a spring.

[0033] Reference signs:

[0034] 100, shell; 110, mounting cavity; 120, accommodating cavity; 130, support part; 140, guide part;

[0035] 200, brush head assembly; 210, support; 211, matching hole; 212, notch; 213, matching part; 2131, first inclined surface; 214, abutting part; 220, bristle head; 221, rotating part; 222, driving part; 223, bristle disc; 224, limiting part;

[0036] 300, driving assembly; 310, inner shaft; 311, first connecting end; 312, second connecting end; 3121, connecting inclined surface; 3122, accommodating space; 313a, first clamping groove; 313b, second clamping groove; 314, protruding block; 315, accommodating groove; 320, elastic piece; 321, first abutting end; 322a, second clamping part; 322b, second clamping part; 323, fold line part; 324, second abutting end; 325, third abutting end. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] Referring to Figures 1 to 4 The embodiment of the first aspect of the present application discloses an electric toothbrush head, which comprises a shell 100, a brush head assembly 200 and a driving assembly 300.

[0039] Specifically, please continue to refer to Figures 1 to 4The shell 100 has a mounting cavity 110 and a containing cavity 120, the containing cavity 120 is communicated with the mounting cavity 110; the brush head assembly 200 includes a support 210 and a bristle head 220, the support 210 is mounted in the mounting cavity 110, the support 210 has a matching hole 211, the bristle head 220 includes a rotating part 221 and a driving part 222, the rotating part 221 is rotatably matched with the matching hole 211, and the driving part 222 is eccentrically arranged with the rotating part 221; the driving assembly 300 includes an inner shaft 310 and an elastic piece 320, the inner shaft 310 is movably arranged in the containing cavity 120, one end of the inner shaft 310 is rotatably connected with the driving part 222, the other end of the inner shaft 310 is used for being matched with the main shaft, the elastic piece 320 is arranged in the containing cavity 120, one end of the elastic piece 320 is connected with the inner wall of the shell 100, the other end of the elastic piece 320 is connected with the inner shaft 310, and the elastic piece 320 is used for driving the inner shaft 310 to move towards the direction away from the driving part 222.

[0040] The main shaft is used for driving the inner shaft 310 to move along the axial direction of the inner shaft 310 and towards the side close to the driving part 222, as indicated by the Z direction in the figure. Figure 4 When the inner shaft 310 moves along the axial direction thereof and towards the side close to the driving part 222, the elastic piece 320 is pushed by the inner shaft 310 and compressed, and when the main shaft moves towards the side away from the driving part 222, the elastic piece 320 can stop the inner shaft 310 and push the inner shaft 310 to move towards the side away from the rotating part 221. In this way, the main shaft is used for pushing the inner shaft 310 to move along the axial direction, and the elastic piece 320 is used for driving the inner shaft 310 to reciprocate along the axial direction, so as to drive the bristle head 220 to reciprocate around the rotating shaft.

[0041] In the electric toothbrush head provided by the embodiment, the bristle head 220 is rotatably mounted in the mounting cavity 110 of the shell 100 through the support 210, the bristle head 220 is rotatably matched with the matching hole 211 of the support 210 through the rotating part 221, the structure design of the brush head assembly 200 can be simplified in the case that the bristle head 220 can reciprocate, the assembly process of the electric toothbrush head can be simplified, and the cost of the electric toothbrush head is reduced. Meanwhile, the inner shaft 310 can be reset through the elastic piece 320 after being lifted by the main shaft, the main shaft does not need to be fixedly connected with the inner shaft 310 of the electric toothbrush head, the bristle head 220 can be driven to reciprocate, the electric toothbrush head can be conveniently replaced, and the use cost of the user is reduced.

[0042] In some embodiments of the present application, referring to Figures 2 to 4The bristle head 220 comprises a bristle disc 223 and a limiting portion 224. The bristle disc 223 is connected to one end of the rotating portion 221, and the limiting portion 224 is arranged at the other end of the rotating shaft. The support 210 has a matching portion 213 provided with a matching hole 211. The matching portion 213 is arranged between the bristle disc 223 and the limiting portion 224. Specifically, the size of the limiting portion 224 is greater than the size of the matching hole 211, so that the matching portion 213 can be limited between the bristle disc 223 and the limiting portion 224. In this way, the rotating portion 221 can be limited from moving along the axis, and the rotating portion 221 is prevented from being separated from the matching hole 211.

[0043] It should be understood that the limiting portion 224 and the rotating portion 221 can be an integral structure or a structure obtained by assembly, which is not limited here.

[0044] In an embodiment, referring to Figure 2 The side surface of the support 210 is provided with a notch 212 in communication with the matching hole 211. The notch 212 is used for the rotating portion 221 to pass through and move into the matching hole 211. In this way, the rotating portion 221 of the bristle head 220 can be assembled into the matching hole 211 from the notch 212 on the side surface of the support 210.

[0045] Further, in order to prevent the rotating portion 221 from sliding out of the notch 212, the minimum opening width of the notch 212 is set to be less than the diameter of the rotating portion 221.

[0046] Further, the width of the notch 212 gradually increases in the direction away from the rotating portion 221. That is, the opening width of the notch 212 near the matching hole 211 is smaller than the opening width of the notch 212 away from the matching hole 211. In this way, the contact area between the matching hole 211 and the rotating portion 221 can be increased, and the probability of the rotating portion 221 jumping out of the notch 212 can be reduced, which helps to reduce the radial jumping of the bristle head 220 during rotation and reduce vibration. At the same time, the opening width of the notch 212 gradually increases in the direction away from the rotating portion 221, which facilitates the alignment of the opening of the notch 212 and the rotating portion 221 during assembly, helps to assemble the rotating portion 221 into the matching hole 211, and improves the assembly efficiency.

[0047] In the embodiment, the opening of the notch 212 is less than one-fourth of the circumference. That is, the opening of the notch 212 is much smaller than the diameter of the cross-sectional profile of the rotating portion 221. After the rotating portion 221 is assembled into the matching hole 211, the contact area between the matching hole 211 and the rotating portion 221 can be increased, and the probability of the rotating portion 221 separating from the matching hole 211 from the notch 212 can be reduced. In this way, the radial jumping of the bristle head 220 can be reduced, and the rotation stability of the bristle head 220 can be ensured.

[0048] It is worth understanding that in the above embodiment, the bracket 210 has a certain elasticity, and during the process that the rotating part 221 enters the matching hole 211 from the gap 212, the bracket 210 is elastically deformed, so that the rotating part 221 enters the matching hole 211 from the gap 212, and after the rotating part 221 passes through the gap 212, the bracket 210 can quickly recover and will not affect the reciprocating circumferential swing of the hair planting head 220.

[0049] Further, referring to Figure 4 and Figure 5 , the shell 100 is provided with a mounting cavity 110, and the outer shape of the bracket 210 is matched with the cavity wall of the mounting cavity 110, so that through the cooperation of the bracket 210 and the mounting cavity 110, the deformation of the outer shape of the bracket 210 is prevented, thereby affecting the rotation of the hair planting head 220. At the same time, the rotating part 221 is rotationally matched with the matching hole 211, and the gap between the rotating part 221 and the matching hole 211 is small, that is, the bracket 210 cannot be deformed into the matching hole 211. Therefore, in this embodiment, the mounting cavity 110 and the rotating part 221 jointly prevent the bracket 210 from deforming, which helps to ensure the stability of the rotation of the hair planting head 220.

[0050] In some embodiments of the present application, referring to Figure 2 and Figure 5 , the bracket 210 includes an abutting portion 214, which is arranged on one side of the matching portion 213 close to the hair planting disc 223, and protrudes from the surface of the matching portion 213. The cross-sectional area of the abutting portion 214 is smaller than the area of the end face of the matching portion 213 close to the hair planting disc 223. The abutting portion 214 protruding from the surface of the matching portion 213 can reduce the contact area of the hair planting disc 223 and the bracket 210, which is beneficial to reduce the noise during the rotation of the hair planting head 220.

[0051] In order to further reduce the probability of contact between the hair planting disc 223 and the bracket 210, and reduce noise, in this embodiment, referring to Figure 5 , the distance between the matching portion 213 and the hair planting disc 223 gradually decreases in the radial direction of the matching hole 211. That is, the matching portion 213 is provided with a first inclined surface 2131 close to the matching hole 211, and the distance between the position close to the matching hole 211 on the first inclined surface 2131 and the hair planting disc 223 is greater. Therefore, the probability of contact between this part of position and the hair planting disc 223 can be reduced, which is beneficial to reduce the vibration and noise during the rotation of the hair planting head 220, and helps to optimize the user experience.

[0052] In some embodiments of the present application, referring to Figure 2 and Figure 4The inner shaft 310 comprises a first connecting end 311 and a second connecting end 312. The first connecting end 311 is configured to be connected with the driving part 222, and the second connecting end 312 is configured to abut against the main shaft so as to be pushed by the main shaft to move the inner shaft 310.

[0053] Further, referring to Figure 2 and Figure 4 , the second connecting end 312 comprises a connecting body and a guide structure arranged on the outer periphery of the connecting body. The guide structure is arranged protruding from the end face of the connecting body. As shown in the drawings, the guide structure and the end face of the connecting body enclose a receiving space 3122 configured to cooperate with the main shaft, so as to at least partially receive the main shaft, thereby facilitating the main shaft to push the inner shaft 310 to move.

[0054] The guide structure can be a solid structure continuously distributed in the circumferential direction of the connecting body, or a structure composed of a plurality of protruding pieces spaced apart in the circumferential direction of the connecting body.

[0055] In the embodiment, referring to Figure 2 and Figure 4 , the guide structure is a structure composed of a plurality of protruding pieces spaced apart in the circumferential direction of the connecting body, and the protruding pieces are three in number.

[0056] In the above embodiment, in order to enable the electric toothbrush head to be detachably installed on the handle of the electric toothbrush, the main shaft and the second connecting end 312 of the inner shaft 310 are arranged in non-fixed connection. That is, during the reciprocating rotation of the driving bristle head 220, the main shaft and the second connecting end 312 can be temporarily separated, and then abut against each other again. Thus, vibration and noise are easily generated between the main shaft and the second connecting end 312.

[0057] In order to improve the foregoing problem, in the embodiment, referring to Figure 2 and Figure 4 , a connecting inclined surface 3121 is arranged on the guide structure, configured to contact the main shaft so as to reduce the movement noise.

[0058] During the reciprocating circumferential rotation of the inner shaft 310 driving the bristle head 220, the elastic member 320 will vibrate at a high frequency, and resonance, uncertain deformation or displacement, etc. are easily generated, thereby affecting the force transmission efficiency and working stability of the elastic member 320.

[0059] In some embodiments of the present application, referring to Figure 4 and Figure 6The inner wall of the shell 100 is provided with a support portion 130, one end of the elastic member 320 abuts against the support portion 130; the inner shaft 310 is provided with a first clamping portion, the elastic member 320 has a second clamping portion, the second clamping portion cooperates with the first clamping portion, and the second clamping portion is fixedly opposite to the first clamping portion. The elastic member 320 of the embodiment is fixedly opposite to the first clamping portion of the inner shaft 310 through the second clamping portion, so that part of the elastic member 320 is fixedly connected with the inner shaft 310, which can reduce 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 to reduce the working noise.

[0060] In the embodiment, the elastic member 320 is between the support portion 130 and the first clamping portion, when the inner shaft 310 moves towards the side close to the driving portion 222, the elastic member 320 is compressed; when the main shaft moves reversely, the elastic potential energy stored in the elastic member 320 is released and pushes the inner shaft 310 to move reversely.

[0061] Further, referring to Figure 6 , one side of the support portion 130 is provided with a guide portion 140, the guide portion 140 has an inclined surface for guiding the elastic member 320 to move to the support portion 130.

[0062] In one embodiment, referring to Figures 6 to 8 , the elastic member 320 is a spring piece, the first clamping portion is a first clamping groove 313a, the front end of the spring piece is a first abutting end 321 for abutting against the support portion 130, and the tail end of the spring piece is formed into a second clamping portion 322a through bending, and the second clamping portion 322a is arranged in the first clamping groove 313a.

[0063] It is worth understanding that the spring piece includes a spring piece body which can be continuous S-shaped, W-shaped or other shapes. The material of the spring piece can be stainless steel, manganese steel, etc.

[0064] In the embodiment, referring to Figure 7 and Figure 8 , the spring piece has a fold line portion 323 which can stretch and contract along the axial direction of the inner shaft 310. When the fold line portion 323 is compressed, the elastic potential energy can be stored in the fold line portion 323; when the external force acting on the fold line portion 323 is removed, the fold line portion 323 releases the elastic potential energy and elongates.

[0065] In the above embodiment, referring to Figure 7 and Figure 8The inner shaft 310 is provided with an accommodating groove 315 located at one side of the first clamping groove 313a, and the accommodating groove 315 is used for accommodating the folding line part 323 which can be telescoped in the accommodating groove 315. In addition to avoiding the interference between the folding line part 323 and the inner shaft 310, the accommodating groove 315 is also used for limiting and guiding the folding line part 323, so as to avoid the uncertain deformation or displacement of the folding line part 323 in the process of high-frequency vibration, thereby improving the motion stability of the inner shaft 310.

[0066] In the embodiment, referring to Figure 7 and Figure 8 , the inner shaft 310 is provided with a groove corresponding to one side of the second connecting end 312, and the groove is provided with a protrusion 314 which divides the groove into the accommodating groove 315 and the first clamping groove 313a.

[0067] In one embodiment of the present application, referring to Figure 9 and Figure 10 , the elastic member 320 is a spring which is sleeved on the outer periphery of the inner shaft. Specifically, one end of the spring is a second abutting end 324 which is used for abutting against the supporting part 130, and the other end of the spring is formed with a second clamping part 322b, the first clamping part is a second clamping groove 313b, and the second clamping part 322b is clamped in the second clamping groove 313b, so as to fixedly connect the spring and the inner shaft 310.

[0068] It is worth understanding that the spring can be a conical spring, a straight cylinder spring or other springs, which are not limited here.

[0069] In the embodiment, referring to Figure 9 and Figure 10 , the end of the spring away from the driving part 222 is a third abutting end 325 which protrudes from the end of the inner shaft 310 and is used for abutting against the main shaft.

[0070] In the embodiment, the spring is specifically a conical spring which includes a conical spring loose coil and a conical spring tight coil, the conical spring tight coil is arranged close to the third abutting end 325, and the helical pitch of the conical spring loose coil is greater than that of the conical spring tight coil, that is, the spring coils of the conical spring tight coil are more dense than those of the conical spring loose coil. In actual application, the conical spring tight coil is used for contacting the main shaft, the power of the main shaft drives the conical spring tight coil to move, and then the conical spring tight coil drives the inner shaft 310 fixed on the conical spring to move, and the inner shaft 310 further transmits the power to the hair planting head 220 to drive the hair planting head 220 to rotate circumferentially.

[0071] The embodiment of the second aspect of the application discloses an electric toothbrush, comprising a handle and an electric toothbrush head. Specifically, a driving motor and the foregoing main shaft are arranged in the handle, the output end of the driving motor is connected with the main shaft, and the main shaft is used for driving the main shaft to perform linear motion. The main shaft is used for driving the inner shaft 310 to move along the axial direction of the inner shaft 310, that is, the main shaft is used for driving the inner shaft 310 to move along the Z direction, as shown in Figure 4 .

[0072] In one embodiment, referring to Figures 2 to 5 , the inner shaft 310 has a second connecting end 312, the end of the main shaft abuts against the second connecting end 312, and the main shaft drives the inner shaft 310 to move along the Z direction by moving along the Z direction. After 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 member 320, until the main shaft drives the inner shaft 310 to move in the positive direction of the Z direction again, and the process is repeated.

[0073] The embodiment of the third aspect of the application discloses an assembling method of an electric toothbrush head, applied to an electric toothbrush head, the electric toothbrush head comprising a shell 100, a bristle planting head 220, a support 210, an inner shaft 310 and an elastic member 320, and comprising the following steps:

[0074] aligning the rotating part 221 of the bristle planting head 220 with the notch 212 on the side surface of the support 210, and clamping the rotating part 221 into the matching hole 211 of the support 210 from the notch 212, so as to assemble the brush head assembly 200;

[0075] installing the elastic member 320 on the inner shaft 310, and installing the inner shaft 310 and the elastic member 320 into the accommodating cavity 120 of the shell 100, and extending one end of the inner shaft 310 to the mounting cavity 110 of the shell 100;

[0076] installing the brush head assembly 200 into the mounting cavity 110, wherein the support 210 is matched with the mounting cavity 110, and the driving part 222 of the bristle planting head 220 is connected with the inner shaft 310.

[0077] In the assembling method of the electric toothbrush head provided by the embodiment of the application, the rotating part 221 of the bristle planting head 220 is clamped into the matching hole 211 through the notch 212 on the side surface of the support 210, the positioning of the bristle planting head 220 in the cross section of the matching hole 211 is realized by matching the matching hole 211 with the rotating part 221, and the positioning of the bristle planting head 220 along the axial direction of the matching hole 211 is realized by the support 210. Therefore, in the case of realizing the reciprocating rotation of the bristle planting head 220 with the rotating part 221 as the rotation shaft, the assembling process of the electric toothbrush head is simplified, and the cost of the electric toothbrush head is reduced.

[0078] It is worth mentioning that the assembling method of the electric toothbrush head of the embodiment is suitable for the electric toothbrush head of any of the foregoing embodiments and has all the technical effects of the foregoing electric toothbrush head, which will not be described herein again.

[0079] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0080] The terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0081] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0083] It should be understood that, although each step in the flowchart of the accompanying drawings is shown in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise explicitly stated herein, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. Moreover, at least part of the steps in the flowchart of the accompanying drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be executed in rotation or alternation with other steps or 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 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.

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 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.

5. The electric toothbrush head according to any one of claims 1 to 4, 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.

6. The electric toothbrush head according to claim 5, 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.

7. The electric toothbrush head according to claim 5, 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.

8. The electric toothbrush head according to claim 7, 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.

9. 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 8, wherein the handle is connected to the housing, and a main shaft is provided inside the handle for driving the inner shaft to move along its own axial direction toward the drive unit.

10. A method for assembling an electric toothbrush head, characterized in that, This technology is applied to electric toothbrush heads, which include a housing, bristle implants, a support, an inner shaft, and elastic components, and comprises the following steps: Align the rotating part of the bristle head with the notch on the side of the bracket, and insert the rotating part into the mating hole of the bracket through the notch to assemble it into a brush head assembly; The elastic element is mounted on the inner shaft, and the inner shaft and the elastic element are inserted together into the receiving cavity of the housing, with one end of the inner shaft extending to the mounting cavity of the housing; The brush head assembly is installed in the mounting cavity, wherein the bracket cooperates with the mounting cavity, and the drive part of the bristle implantation head is connected to the inner shaft.

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