Electric toothbrush

Abstract

The embodiment of the utility model discloses an electric toothbrush which comprises a motor body, an output shaft, a toothbrush head and a pressure sensing module. The motor body comprises a motor shell; one end of the output shaft is connected into the motor body, and the other end extends out of the motor shell to form a connecting section which is provided with a first side surface and a second side surface opposite to each other; the toothbrush head comprises a brush head body and a bristle set, the brush head body is connected to the connecting section, and the bristle set is arranged on the side, away from the second side face, of the brush head body. The pressure sensing module comprises a pressure sensor and a circuit board assembly, the circuit board assembly is provided with a deformation part, and the deformation part flexibly abuts against the second side face of the output shaft or the side wall face, on the same side as the second side face, of the motor shell; the pressure sensor is arranged on the deformation part and used for detecting the stress of the output shaft. The electric toothbrush disclosed by the utility model is higher in pressure detection sensitivity and precision on the toothbrush head.

Description

Technical Field

[0001] The present application relates to the technical field of electric toothbrushes, and in particular to an electric toothbrush. Background Art

[0002] Electric toothbrushes are gaining popularity due to their powerful cleaning power, high cleaning efficiency, and even brushing pressure. When brushing, users must hold the electric toothbrush so that the bristles contact the teeth. However, excessive pressure, especially when used by children, can cause the bristles to press against the teeth with excessive force, causing excessive wear and tear, potentially damaging the teeth or gums.

[0003] In related art, a pressure sensor is installed on an electric toothbrush to detect whether the toothbrush head is applying excessive pressure to the teeth. However, current pressure sensors are typically located on the front side of the motor or motor shaft, that is, on the side of the electric toothbrush where the bristles are located and faces the user during use. Pressure measurement is achieved by detecting the displacement of the motor shaft or motor front side, resulting in low pressure detection accuracy and sensitivity of the toothbrush head.

[0004] The above content is only used to assist in understanding the technical solution of the utility model and does not constitute an admission that the above content is prior art. Utility Model Content

[0005] In view of the above problems, the present invention proposes an electric toothbrush, which aims to solve the technical problems of low pressure detection accuracy and sensitivity of the toothbrush head of the electric toothbrush.

[0006] To achieve the above-mentioned purpose, the electric toothbrush proposed in the present invention includes a motor body, an output shaft, a toothbrush head and a pressure sensing module:

[0007] The motor body includes a motor housing;

[0008] One end of the output shaft is connected to the motor body, and the other end extends out of the motor housing to form a connecting section, wherein the connecting section has a first side surface and a second side surface opposite to each other;

[0009] The toothbrush head comprises a brush head body and a bristle group, wherein the brush head body is connected to the connecting section, and the bristle group is arranged on a side of the brush head body away from the second side surface;

[0010] The pressure sensing module includes a pressure sensor and a circuit board assembly, the circuit board assembly has a deformable portion, and the deformable portion flexibly abuts the second side surface of the output shaft or the side wall surface of the motor housing on the same side as the second side surface; the pressure sensor is arranged on the deformable portion to detect the force applied to the output shaft.

[0011] In one embodiment, the circuit board assembly includes a hard circuit board and a flexible circuit board, one end of the flexible circuit board is electrically connected to the hard circuit board, and the other end is used to electrically connect to the main control board; the deformation portion is provided on the hard circuit board, and the hard circuit board elastically abuts the second side surface of the output shaft or the side wall surface of the motor housing on the same side as the second side surface.

[0012] In one embodiment, the electric toothbrush further comprises an elastic sleeve mounted on the output shaft, and the hard circuit board abuts against the side of the elastic sleeve facing away from the first side, so that the hard circuit board abuts against the second side of the output shaft through the elastic sleeve.

[0013] In one embodiment, the electric toothbrush further includes a motor bracket, the motor body is fixedly installed in the motor bracket, the hard circuit board is fixedly connected to the end of the motor bracket adjacent to the toothbrush head, and the elastic sleeve is arranged on one end of the connecting section adjacent to the motor bracket or the motor body.

[0014] In one embodiment, the motor bracket includes a mounting body and a boss connected to the end face of the mounting body close to the toothbrush head; the motor body is fixed in the mounting body; a waterproof part is installed in the boss and is sleeved on the outer periphery of the connecting section, and the elastic sleeve is located between the waterproof part and the motor body; a through hole is opened on the boss for the flexible circuit board to pass through.

[0015] In one embodiment, the rigid circuit board elastically abuts against a side wall surface of the motor housing adjacent to the connecting section.

[0016] In one embodiment, the electric toothbrush further includes an elastic pressure head, and the hard circuit board abuts against the side wall surface of the motor housing on the same side as the second side surface through the elastic pressure head.

[0017] In one embodiment, the electric toothbrush also includes a motor bracket, the motor body is fixed in the motor bracket, the hard circuit board is fixedly installed on the peripheral side wall of the motor bracket facing away from the first side surface, the motor bracket is provided with a through hole corresponding to the deformation part, one end of the elastic pressure head is fixedly connected to the deformation part, and the other end passes through the through hole and abuts against the motor housing.

[0018] In one embodiment, the rigid circuit board extends in a long strip shape along the length direction of the motor bracket, and the rigid circuit board further includes a fixing portion connected to the lower end of the deformable portion, the fixing portion is fixedly connected to the motor bracket, and the width of the deformable portion is smaller than the width of the fixing portion.

[0019] In one embodiment, the electric toothbrush further includes a motor bracket and a main control board, the motor body is fixedly installed in the motor bracket, and the main control board is fixed to the side wall of the motor bracket facing away from the second side surface; the flexible circuit board includes a longitudinal extension section and a transverse extension section, the longitudinal extension section extends along the length direction of the motor bracket, and one end of the longitudinal extension section is electrically connected to the hard circuit board, and the other end is connected to the transverse extension section; the transverse extension section extends along the bottom surface of the motor body and is electrically connected to the main control board.

[0020] In one embodiment, the electric toothbrush further includes a power supply unit disposed below the motor body, and the transverse extension section is disposed between the motor body and the power supply unit and is plugged into the main control board.

[0021] In one embodiment, the electric toothbrush also includes a handle shell, a bottom cover assembly and an overpressure prompt module. The bottom cover assembly is fixed to the bottom end of the handle shell, the motor body and the pressure sensing module are installed in the handle shell, and the connecting section extends out of the handle shell to connect with the brush head body; the overpressure prompt module is installed on the bottom cover assembly to issue a prompt message after the pressure value detected by the pressure sensor exceeds a threshold value.

[0022] In one embodiment, the overpressure warning module includes a light board, the bottom cover assembly has a light-transmitting window exposed from the brush handle shell, and the light board is used to emit a warning light toward the light-transmitting window after the pressure value detected by the pressure sensor exceeds a threshold.

[0023] In one embodiment, the light-transmitting window is in a ring shape extending around the outer circumference of the brush handle housing.

[0024] In one embodiment, the bottom cover assembly includes a light-transmitting shell and a bottom plate, the light-transmitting shell includes an annular base and an embedded surrounding wall connected to the upper end of the annular base, the embedded surrounding wall is embedded in the inner cavity of the brush handle shell, the outer peripheral wall of the annular base is spliced ​​with the outer peripheral wall of the brush handle shell to form the light-transmitting window, the bottom plate is fixed to the bottom of the annular base, and is arranged to cover the hollow area of ​​the annular base; the light board is fixed in the cavity formed by the light-transmitting shell and the bottom plate.

[0025] In one embodiment, the overpressure warning module further includes a speaker, and the bottom cover assembly has a sound outlet connected to the outside, and the speaker is used to issue a voice prompt toward the sound outlet when the pressure value detected by the pressure sensor exceeds a threshold.

[0026] In one embodiment, an installation cavity and a sound output cavity that are interconnected are formed in the bottom cover assembly, the speaker is installed in the installation cavity, and the sound output part of the speaker is arranged toward the sound output cavity; the sound output hole is connected to the sound output cavity, and a waterproof and breathable membrane covering the sound output hole is provided in the sound output cavity.

[0027] The electric toothbrush of the utility model has a connecting section where the output shaft extends out of the motor housing, which has opposing first and second side surfaces. The bristle assembly is disposed on the side of the brush head body facing away from the second side surface. The deformable portion of the circuit board assembly flexibly abuts the second side surface of the output shaft or the sidewall surface of the motor housing on the same side as the second side surface. The pressure sensor is disposed on the deformable portion. In this manner, the deformable portion of the circuit board assembly can directly withstand the back pressure of the output shaft or the motor housing when the toothbrush head is subjected to force. This can reduce the detection error of the pressure sensor disposed on the deformable portion, making the pressure sensor's detection result of the pressure applied to the toothbrush head more accurate and reliable. It can also improve the detection accuracy and sensitivity of the entire pressure sensing module to the pressure applied to the toothbrush head, thereby providing higher stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 Shows a schematic structural diagram of an embodiment of the electric toothbrush of the present utility model;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the electric toothbrush with the handle housing removed;

[0031] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0032] Figure 4 for Figure 1 A cross-sectional view of an electric toothbrush at one angle;

[0033] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0034] Figure 6 for Figure 4 A partial enlarged view of point C in the middle;

[0035] Figure 7 This is a schematic diagram of the assembly of the output shaft, motor body, main control board, and pressure sensing module of the utility model;

[0036] Figure 8 This is a structural diagram of another embodiment of the electric toothbrush of the present invention, wherein the brush handle housing and the bottom cover assembly are removed;

[0037] Figure 9 for Figure 8 A partial enlarged view of point D in the middle;

[0038] Figure 10 for Figure 8 Assembly diagram of the output shaft, motor body, main control board, and pressure sensing module;

[0039] Figure 11 This is a structural diagram of another embodiment of the electric toothbrush of the present invention, wherein the brush handle housing and the bottom cover assembly are removed;

[0040] Figure 12 for Figure 11 A partial enlarged view of point E in the middle;

[0041] Figure 13 for Figure 10 A cross-sectional view of the structure at one angle;

[0042] Figure 14 for Figure 13 A partial enlarged view of point F in the middle;

[0043] Figure 15 This is a partial schematic diagram of a cross-sectional view of yet another embodiment of the electric toothbrush of the present invention;

[0044] Figure 16 This is a structural schematic diagram of an embodiment of a bottom cover assembly of an electric toothbrush according to the present invention;

[0045] Figure 17 for Figure 16 Schematic diagram of the exploded structure of the midsole cover assembly;

[0046] Figure 18 This is a structural schematic diagram of another embodiment of the bottom cover assembly of the electric toothbrush of the present utility model;

[0047] Figure 19 for Figure 18 a cross-sectional view of the midsole cover assembly at one angle;

[0048] Figure 20 for Figure 18 Schematic diagram of the exploded structure of the midsole cover assembly.

[0049] Description of Figure Numbers:

[0050] Label name Label name Label name 100 Motor body 110 Motor housing 200 output shaft 210 Connecting segment 211 First side 212 Second side 300 toothbrush head 310 Brush head body 320 Brush set 400 Pressure sensor module 410 pressure sensor 420 Circuit Board Assembly 421 Rigid circuit boards 422 Deformation part 423 Fixed part 424 Flexible circuit boards 425 Longitudinal extension section 426 Horizontal extension section 500 Motor bracket 510 Installation body 520 boss 521 Via 530 Waterproof parts 540 through-hole 610 elastic sleeve 620 Elastic pressure head 710 Main control board 720 Power supply unit 730 Brush handle housing 800 Bottom cover assembly 810 Light-transmitting window 820 Translucent Shell 821 Ring base 822 Built-in wall 830 baseplate 840 Sound hole 850 Mounting cavity 860 Vocal cavity 870 waterproof breathable membrane 900 Overvoltage warning module 910 Light Board 920 speaker

[0051] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0053] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0054] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0055] The utility model provides an electric toothbrush.

[0056] In the embodiment of this utility model, please refer to Figures 1 to 5 、 Figures 7 to 11The electric toothbrush includes a motor body 100, an output shaft 200, a toothbrush head 300, and a pressure sensing module 400. The motor body 100 includes a motor housing 110. One end of the output shaft 200 is connected to the motor body 100, and the other end extends out of the motor housing 110 to form a connecting section 210. The connecting section 210 has a first side surface 211 and a second side surface 212 that are opposite to each other. The toothbrush head 300 includes a brush head body 310 and a bristle group 320. The brush head body 310 is connected to the connecting section 210, and the bristle group 320 is arranged on the side of the brush head body 310 away from the second side surface 212. The pressure sensing module 400 includes a pressure sensor 410 and a circuit board assembly 420, wherein the circuit board assembly 420 has a deformation portion 422, and the deformation portion 422 flexibly abuts the second side surface 212 of the output shaft 200 or the side wall surface of the motor housing 110 on the same side as the second side surface 212; the pressure sensor 410 is arranged on the deformation portion 422 to detect the force applied to the output shaft 200.

[0057] In this embodiment, the motor body 100 includes a rotor assembly, a stator assembly, etc. One end of the output shaft 200 extends into the motor housing 110 and is connected to the rotor assembly of the motor body 100 to drive it to rotate or vibrate at high frequency through the motor body 100. The other end of the output shaft 200 extends out of the motor housing 110 to be connected to the brush head body 310, thereby driving the toothbrush head 300 to rotate or vibrate at high frequency. Usually, the brush head body 310 and the connecting section 210 are detachably connected to facilitate the replacement of the toothbrush head 300. There can be many ways to connect the connecting section 210 of the output shaft 200 to the brush head body 310. For details, please refer to existing designs and will not be described in detail here. The shape and specific structure of the toothbrush head 300 can be selected and designed according to actual needs and are not specifically limited here.

[0058] For ease of description, the side of the electric toothbrush with the bristle group 320 is defined as the front side, and the side opposite to the front side is defined as the back side. Therefore, the first side 211 is located on the front side of the output shaft 200, and the second side 212 is located on the back side of the output shaft 200.

[0059] The circuit board assembly 420 can include only a rigid PCB or a flexible circuit board 424 (FPC), or it can be a combination of a rigid PCB and the flexible circuit board 424. The deformable portion 422 can be disposed on either the rigid PCB or the flexible circuit board 424. The deformable portion 422 flexibly abuts the output shaft 200 or the motor housing 110. When the deformable portion 422 is located on the flexible circuit board 424, the flexible circuit board 424 directly abuts the output shaft 200 or the motor housing 110, which constitutes flexible abutment. However, when the deformable portion 422 is located on a rigid PCB, the rigid PCB must be flexibly abutted against the output shaft 200 or the motor housing 110 via an elastic member. By ensuring that the deformable portion 422 of the circuit board assembly 420 flexibly abuts the output shaft 200 or the motor housing 110, the circuit board assembly 420 can be prevented from colliding head-on with the output shaft 200 or the motor housing 110, effectively preventing the high-frequency vibration of the motor from affecting the detection accuracy of the pressure sensor 410.

[0060] And by making the deformation part 422 of the circuit board flexibly abut the second side surface 212 of the output shaft 200 or the side wall surface of the motor housing 110 on the same side as the second side surface 212, that is, the deformation part 422 of the circuit board flexibly abuts against the back of the output shaft 200 or the motor housing 110, compared with the method of detecting the pressure on the toothbrush head 300 by displacement by fitting the circuit board to the front of the output shaft 200 or the motor housing 110, the deformation part 422 can directly withstand the back pressure of the output shaft 200 or the motor housing 110, and the detection accuracy and detection sensitivity of the pressure sensor 410 arranged on the deformation part 422 are higher.

[0061] The electric toothbrush of the present invention has a connecting section 210 where the output shaft 200 extends from the motor housing 110, which has opposing first and second side surfaces 211 and 212. The bristle assembly 320 is disposed on the side of the brush head body 310 facing away from the second side surface 212. The deformable portion 422 of the circuit board assembly 420 flexibly abuts the second side surface 212 of the output shaft 200 or the sidewall of the motor housing 110 on the same side as the second side surface 212. The pressure sensor 410 is disposed on the deformable portion 422. In this manner, the deformable portion 422 of the circuit board assembly 420 can directly withstand the back pressure of the output shaft 200 or the motor housing 110 when the toothbrush head 300 is subjected to force. This can reduce detection errors of the pressure sensor 410 disposed on the deformable portion 422, making the pressure sensor 410's detection results of the pressure on the toothbrush head 300 more accurate and reliable. Furthermore, the pressure sensing module 400 can also improve its detection accuracy and sensitivity in detecting the pressure on the toothbrush head 300, thereby providing greater stability.

[0062] Furthermore, the circuit board assembly 420 includes a hard circuit board 421 and a flexible circuit board 424, one end of the flexible circuit board 424 is electrically connected to the hard circuit board 421, and the other end is used to electrically connect to the main control board 710; the deformation portion 422 is provided on the hard circuit board 421, and the hard circuit board 421 elastically abuts the second side surface 212 of the output shaft 200 or the side wall surface of the motor housing 110 on the same side as the second side surface 212.

[0063] In this embodiment, the flexible circuit board 424 and the main control board 710 can be electrically connected through plugging, welding, or other methods, which are not specifically limited herein. By including the flexible circuit board 424 in the circuit board assembly 420, the flexible circuit board 424 can be bent to adapt to the complex spatial layout within the electric toothbrush to electrically connect to the main control board 710. Specifically, the rigid circuit board 421 can be elastically abutted against the back of the output shaft 200 or the back of the motor housing 110 via elastic members. This prevents the rigid circuit board 421 from colliding with the output shaft 200 or the motor housing 110, thereby reducing the impact of high-frequency vibrations from the motor on the detection accuracy of the pressure sensor 410.

[0064] The rigid circuit board 421 can be specifically fixed to the motor bracket 500. By providing the deformable portion 422 on the rigid circuit board 421, when pressure is applied to the toothbrush head 300, the output shaft 200 or the back of the motor housing 110 is also compressed. This pressure acts directly on the deformable portion 422 of the rigid circuit board 421. Compared to directly attaching the flexible circuit board 424 to the output shaft 200 or the motor housing 110, this can reduce the difficulty of fixing the deformable portion 422 and effectively prevent failure of the connection between the flexible circuit board 424 and the output shaft 200 or the motor housing 110 due to long-term vibration of the motor, thereby ensuring the detection stability of the pressure sensor 410.

[0065] In one embodiment, if Figures 8 to 14 As shown, the electric toothbrush also includes an elastic sleeve 610 mounted on the output shaft 200, and the hard circuit board 421 abuts against the side of the elastic sleeve 610 away from the first side 211, so that the hard circuit board 421 abuts against the second side 212 of the output shaft 200 through the elastic sleeve 610.

[0066] In this embodiment, the elastic sleeve 610 can be made of an elastic material such as silicone or rubber. The elastic sleeve 610 seals and securely fits over the output shaft 200. By placing the rigid circuit board 421 against the back of the output shaft 200 through the elastic sleeve 610, the elastic sleeve 610 absorbs and cushions vibrations transmitted from the output shaft 200 to the rigid circuit board 421 while maintaining the rotation of the output shaft 200. Specifically, the output shaft 200 maintains rotational contact with the rigid circuit board 421 through the elastic sleeve 610.

[0067] Furthermore, the electric toothbrush also includes a motor bracket 500, the motor body 100 being fixedly mounted within the motor bracket 500, the rigid circuit board 421 being fixedly connected to the end of the motor bracket 500 adjacent to the toothbrush head 300, and the elastic sleeve 610 being sleeved over the end of the connecting section 210 adjacent to the motor bracket 500 or the motor body 100. The rigid circuit board 421 can be fixedly connected to the end of the motor bracket 500 by means of a snap-fit ​​or crimping connection. The rigid circuit board 421 being fixedly connected to the motor bracket 500 ensures secure installation of the rigid circuit board 421. By fixing the hard circuit board 421 to the end of the motor bracket 500 adjacent to the toothbrush head 300, and the elastic sleeve 610 is sleeved on one end of the connecting section 210 adjacent to the motor bracket 500 or the motor body 100, after the output shaft 200 is subjected to force, the pressure change at the elastic sleeve 610 is more obvious, and the pressure sensor 410 arranged on the hard circuit board 421 can more easily detect the pressure change, thereby improving the detection accuracy and sensitivity of the toothbrush head 300.

[0068] For further information, please refer to Figures 11 to 14 The motor bracket 500 includes a mounting body 510 and a boss 520 connected to the end face of the mounting body 510 close to the toothbrush head 300; the motor body 100 is fixed in the mounting body 510; a waterproof component 530 is installed in the boss 520 and is sleeved on the outer periphery of the connecting section 210, and the elastic sleeve 610 is located between the waterproof component 530 and the motor body 100; a through hole 521 is opened on the boss 520 for the flexible circuit board 424 to pass through.

[0069] In this embodiment, by disposing a waterproof member 530 within the boss 520, the output shaft 200 can be sealed and waterproofed. The elastic sleeve 610 can be partially or completely embedded within the boss 520. By positioning the elastic sleeve 610 between the waterproof member 530 and the motor body 100, on the one hand, the elastic sleeve 610, the rigid circuit board 421, the pressure sensor 410, and other components are positioned below the waterproof member 530, effectively preventing external water or other liquids from affecting the detection of the pressure sensor 410. On the other hand, the upper and lower limits of the elastic sleeve 610 can be positioned between the motor body 100 and the waterproof member 530, thereby improving the installation stability of the elastic sleeve 610.

[0070] In another embodiment, Figures 2 to 5 、 Figure 7As shown, the rigid circuit board 421 elastically abuts against the side wall of the motor housing 110 adjacent to the connecting section 210. Specifically, the rigid circuit board 421 can be elastically abutted against the motor housing 110 via an elastic member. By elastically abutting the rigid circuit board 421 against the back surface of the motor housing 110 adjacent to the connecting section 210, when the output shaft 200 is subjected to force, the pressure change transmitted to the deformed portion 422 of the rigid circuit board 421 through the motor housing 110 is more obvious, making it easier for the pressure sensor 410 provided on the rigid circuit board 421 to detect the pressure change, thereby improving the detection accuracy and sensitivity of the toothbrush head 300.

[0071] Furthermore, the electric toothbrush also includes an elastic pressure head 620, and the hard circuit board 421 abuts against the side wall surface of the motor housing 110 on the same side as the second side surface 212 through the elastic pressure head 620. The elastic pressure head 620 can be made of elastic materials such as silicone and rubber. The elastic pressure head 620 can have many shapes, such as columnar, block-shaped, etc., which are not specifically limited here. By making the hard circuit board 421 abut against the back of the motor housing 110 through the elastic pressure head 620, the vibration transmitted from the motor housing 110 to the hard circuit board 421 can be absorbed and buffered, so as to ensure the detection accuracy and stability of the pressure sensor 410.

[0072] In one embodiment, if Figures 2 to 5 As shown, the electric toothbrush also includes a motor bracket 500, the motor body 100 is fixed in the motor bracket 500, the hard circuit board 421 is fixedly installed on the peripheral side wall of the motor bracket 500 away from the first side surface 211, and the motor bracket 500 is provided with a through hole 540 corresponding to the deformation part 422, one end of the elastic pressure head 620 is fixedly connected to the deformation part 422, and the other end passes through the through hole 540 and abuts against the motor housing 110.

[0073] In this embodiment, the motor bracket 500 can have many structures and forms. For example, the motor bracket 500 can be a cylindrical structure. The hard circuit board 421 can be fixedly connected to the back of the motor bracket 500 by means of snap connection, screw connection, etc., which makes it more convenient to disassemble and repair the hard circuit board 421. A through hole 540 corresponding to the deformation part 422 is provided on the motor bracket 500, so that the deformation part 422 can be displaced and deformed in the through hole 540, which can avoid interference between the deformation part 422 and the motor bracket 500. The elastic pressure head 620 passes through the through hole 540 and abuts against the motor housing 110, that is, the elastic pressure head 620 directly abuts against the back of the motor housing 110, which can ensure the detection effect of the entire pressure sensing module 400.

[0074] Further, please refer to Figure 2 、 Figure 3 and Figure 7The hard circuit board 421 extends in a long strip shape along the length direction of the motor bracket 500. The hard circuit board 421 also includes a fixing portion 423 connected to the lower end of the deformation portion 422. The fixing portion 423 is fixedly connected to the motor bracket 500. The width of the deformation portion 422 is smaller than the width of the fixing portion 423.

[0075] In this embodiment, the rigid circuit board 421 is fixedly connected to the motor bracket 500 via the fixing portion 423. The fixing portion 423 and the motor bracket 500 can be fixedly connected by means of a snap connection, screw connection, or other methods. By making the rigid circuit board 421 as a whole elongated, and the width of the deformable portion 422 smaller than the width of the fixing portion 423, the deformable portion 422 is more easily deformed relative to the fixing portion 423. In other words, the deformation of the deformable portion 422 is more significant, thereby improving the detection accuracy and sensitivity of the pressure sensor 410 disposed on the deformable portion 422.

[0076] In one embodiment, if Figure 2 、 Figure 4 、 Figures 7 to 11 As shown, the electric toothbrush also includes a motor bracket 500 and a main control board 710, the motor body 100 is fixedly installed in the motor bracket 500, and the main control board 710 is fixed to the side wall of the motor bracket 500 facing away from the second side surface 212; the flexible circuit board 424 includes a longitudinal extension section 425 and a transverse extension section 426, the longitudinal extension section 425 extends along the length direction of the motor bracket 500, and one end of the longitudinal extension section 425 is electrically connected to the hard circuit board 421, and the other end is connected to the transverse extension section 426; the transverse extension section 426 extends along the bottom surface of the motor body 100 and is electrically connected to the main control board 710.

[0077] In this embodiment, the main control board 710 and the motor bracket 500 can be fixedly connected by screws, clips, or positioning posts. The main control board 710 is fixed to the side wall of the motor bracket 500 facing away from the second side surface 212, that is, the main control board 710 is fixed to the front of the motor bracket 500. Adaptively, the buttons for the electric toothbrush are also located on the front of the handle housing 730. Because the circuit board assembly 420 is located on the back of the motor bracket 500 and the main control board 710 is located on the front of the motor bracket 500, the flexible circuit board 424 needs to be bent to electrically connect to the main control board 710. By extending the longitudinal extension 425 of the flexible circuit board 424 along the length of the motor bracket 500 and the transverse extension 426 along the bottom surface of the motor body 100, the flexible circuit board 424 is electrically connected to the main control board 710 while eliminating the need for the flexible circuit board 424 to be twisted and wrapped around the outer periphery of the motor bracket 500, thereby increasing the service life of the flexible circuit board 424. The longitudinal extension section 425 can fit the outer peripheral wall of the motor bracket 500, and the transverse extension section 426 can be adjacent to or fit the bottom surface of the motor body 100 to prevent the flexible circuit board 424 from being suspended or shifted, thereby ensuring the installation stability between the flexible circuit board 424 and the motor bracket 500.

[0078] Further, please refer to Figure 2 、 Figure 4 、 Figures 7 to 11 The electric toothbrush further includes a power supply unit 720 disposed below the motor body 100. The transverse extension section 426 is disposed between the motor body 100 and the power supply unit 720 and is plugged into the main control board 710. Specifically, the motor bracket 500 can be extended downward to form a battery mounting compartment for mounting the power supply unit 720. The power supply unit 720 can also be mounted by additionally providing a battery bracket. Providing the transverse extension section 426 between the motor body 100 and the power supply unit 720 can further prevent the flexible circuit board 424 from shifting or becoming disconnected, thereby improving the connection stability of the entire flexible circuit board 424.

[0079] In one embodiment, if Figure 2 、 Figure 4 、 Figure 6 、 Figures 15 to 20 As shown, the electric toothbrush also includes a handle shell 730, a bottom cover assembly 800 and an overpressure prompt module 900. The bottom cover assembly 800 is fixed to the bottom end of the handle shell 730, the motor body 100 and the pressure sensing module 400 are installed in the handle shell 730, and the connecting section 210 extends out of the handle shell 730 to connect with the brush head body 310; the overpressure prompt module 900 is installed on the bottom cover assembly 800 to issue a prompt message after the pressure value detected by the pressure sensor 410 exceeds the threshold.

[0080] In this embodiment, the handle housing 730 provides installation space and protection for the motor body 100, motor bracket 500, power supply unit 720, and other components. The handle housing 730 can be a single-layer structure or a double-layer structure with a metal outer layer and a plastic inner layer. The handle housing 730 can have a variety of shapes, including, for example, a circular, elliptical, or rounded-corner triangular cross-section. The shape and structure of the handle housing 730 are not specifically limited herein.

[0081] The overpressure prompt module 900 may include one or more prompting components such as a light board 910, a speaker 920, and a buzzer. It only needs to be able to issue a prompt message after the pressure sensor 410 detects that the pressure on the toothbrush head 300 exceeds a threshold value. The specific type of the overpressure prompt module 900 is not limited here. By setting the overpressure prompt module 900, when the user uses an electric toothbrush with too much force to brush their teeth, the overpressure prompt module 900 will issue an overpressure prompt message. The user can reduce the brushing force according to the prompt message to avoid damaging the teeth or gums. Placing the overpressure prompt module 900 on the bottom cover assembly 800 makes it easier to disassemble and repair the overpressure prompt module 900 than setting it at other locations in the brush handle housing 730.

[0082] In one embodiment, please refer to Figure 6 、 Figures 15 to 20 The overpressure warning module 900 includes a light board 910, and the bottom cover assembly 800 has a light-transmitting window 810 exposed in the brush handle shell 730. The light board 910 is used to emit a warning light toward the light-transmitting window 810 after the pressure value detected by the pressure sensor 410 exceeds a threshold value.

[0083] In this embodiment, the bottom cover assembly 800 can be configured as entirely or partially transparent or translucent to form the light-transmitting window 810. The light board 910 specifically includes a PCB and a plurality of lamp bodies disposed on the PCB. The overvoltage warning module 900 includes the light board 910, and a warning light is emitted through the light-transmitting window 810 of the bottom cover assembly 800 to achieve the purpose of overvoltage warning. This makes the overvoltage warning more intuitive and eye-catching, making it easier for the user to observe while brushing their teeth. In addition, the light board 910 can also display the charging effect, making the product more aesthetically pleasing to use.

[0084] Furthermore, the light-transmitting window 810 is annular and extends around the outer circumference of the handle housing 730. Thus, the bottom cover assembly 800 has an annular light-transmitting lighting effect, which increases the light-transmitting display area and surface, enhances the aesthetics, and enables the user to observe the prompt light 360 degrees around the circumference of the electric toothbrush.

[0085] In one embodiment, if Figure 6 、 Figures 15 to 20 As shown, the bottom cover assembly 800 includes a light-transmitting shell 820 and a bottom plate 830. The light-transmitting shell 820 includes an annular base 821 and an embedded surrounding wall 822 connected to the upper end of the annular base 821. The embedded surrounding wall 822 is embedded in the inner cavity of the brush handle shell 730. The outer peripheral wall of the annular base 821 is spliced ​​with the outer peripheral wall of the brush handle shell 730 to form the light-transmitting window 810. The bottom plate 830 is fixed to the bottom of the annular base 821 and covers the hollow area of ​​the annular base 821. The light board 910 is fixed in the cavity formed by the light-transmitting shell 820 and the bottom plate 830.

[0086] In this embodiment, the bottom plate 830 can be specifically a light shielding plate, which can shield the internal structure of the bottom cover assembly 800 and enhance the aesthetics of the bottom cover assembly 800. Of course, in some embodiments, the bottom plate 830 can also be configured as a light-transmitting plate. The bottom plate 830 and the annular base 821 can be fixedly connected by bonding, splicing, secondary injection molding, etc. The embedded surrounding wall 822 is embedded in the inner cavity of the brush handle housing 730, and the embedded surrounding wall 822 can be snap-fitted and fixed to the brush handle housing 730, the motor bracket 500, or the battery bracket. The outer peripheral wall of the annular base 821 is spliced ​​with the outer peripheral wall of the brush handle housing 730 to form the light-transmitting window 810. The light board 910 is fixed in the cavity formed by the light-transmitting shell 820 and the bottom plate 830, and the light emitted by the light board 910 can be transmitted through the annular base 821 between the bottom plate 830 and the brush handle housing 730.

[0087] In one embodiment, please refer to Figure 6 、 Figures 18 to 20 The overpressure prompt module 900 also includes a speaker 920. The bottom cover assembly 800 has a sound hole 840 connected to the outside. The speaker 920 is used to issue a voice prompt toward the sound hole 840 after the pressure value detected by the pressure sensor 410 exceeds a threshold.

[0088] In this embodiment, by including a speaker 920 in the overpressure warning module 900, if the user brushes too hard with the electric toothbrush and the pressure value detected by the pressure sensor 410 exceeds a threshold, the speaker 920 will issue a voice prompt through the sound outlet 840 to prompt the user to reduce the brushing force. The use of voice prompts makes the overpressure warning more direct and obvious, and even blind people can receive the overpressure warning information.

[0089] Furthermore, the bottom cover assembly 800 is formed with a mounting cavity 850 and a sound cavity 860 that are interconnected. The speaker 920 is mounted in the mounting cavity 850, with the sound-emitting portion of the speaker 920 facing the sound cavity 860. The sound hole 840 is connected to the sound cavity 860, and a waterproof breathable membrane 870 is provided in the sound cavity 860 to cover the sound hole 840. By providing the waterproof breathable membrane 870 to cover the sound hole 840, the interior of the brush handle housing 730 can be waterproof and breathable without affecting the sound effect, effectively preventing external moisture from entering the bottom cover assembly 800 through the sound hole 840 and affecting the operation of the electronic components. The mounting cavity 850 can be formed by additionally providing a mounting seat, or the mounting cavity 850 can be formed inside the bottom cover assembly 800.

[0090] In one embodiment, please refer to Figure 6 、 Figures 15 to 20 The overpressure warning module 900 includes a light board 910 and a speaker 920. The bottom cover assembly 800 has a light-transmitting window 810 exposed from the brush handle housing 730. The light board 910 is used to emit a warning light toward the light-transmitting window 810 when the pressure value detected by the pressure sensor 410 exceeds a threshold value. The bottom cover assembly 800 has a sound outlet 840 connected to the outside. The speaker 920 is used to emit a voice prompt toward the sound outlet 840 when the pressure value detected by the pressure sensor 410 exceeds a threshold value. In this way, the electric toothbrush has both a light overpressure prompt and a voice overpressure prompt, which can provide the user with overpressure prompt information more directly and reliably. In combination with the above embodiment in which the bottom cover assembly 800 is formed with a mounting cavity 850 and a sound outlet cavity 860 that are interconnected, the electric toothbrush further includes a mounting base that can be detachably fixed above the sound outlet cavity 860, and the mounting cavity 850 is formed in the mounting base. In this way, the speaker 920 and the mounting base are detachable as a whole, making it easier to assemble and inspect the internal structure of the bottom cover assembly 800.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric toothbrush, characterized in that: include: A motor body, the motor body including a motor housing; an output shaft, one end of which is connected to the motor body and the other end of which extends out of the motor housing to form a connecting section, wherein the connecting section has a first side surface and a second side surface opposite to each other; A toothbrush head, comprising a brush head body and a bristle group, wherein the brush head body is connected to the connecting section, and the bristle group is arranged on a side of the brush head body away from the second side surface; as well as The pressure sensing module includes a pressure sensor and a circuit board assembly, wherein the circuit board assembly has a deformable portion, and the deformable portion flexibly abuts the second side surface of the output shaft or the side wall surface of the motor housing on the same side as the second side surface; the pressure sensor is arranged on the deformable portion to detect the force applied to the output shaft.

2. The electric toothbrush according to claim 1, wherein The circuit board assembly includes a hard circuit board and a flexible circuit board, one end of the flexible circuit board is electrically connected to the hard circuit board, and the other end is used to electrically connect to the main control board; the deformation portion is provided on the hard circuit board, and the hard circuit board elastically abuts the second side surface of the output shaft or the side wall surface of the motor housing on the same side as the second side surface.

3. The electric toothbrush according to claim 2, wherein The electric toothbrush further includes an elastic sleeve sleeved on the output shaft, and the hard circuit board abuts against a side of the elastic sleeve away from the first side, so that the hard circuit board abuts against the second side of the output shaft through the elastic sleeve.

4. The electric toothbrush according to claim 3, wherein The electric toothbrush also includes a motor bracket, the motor body is fixedly installed in the motor bracket, the hard circuit board is fixedly connected to the end of the motor bracket adjacent to the toothbrush head, and the elastic sleeve is arranged on one end of the connecting section adjacent to the motor bracket or the motor body.

5. The electric toothbrush according to claim 4, wherein The motor bracket includes a mounting body and a boss connected to the mounting body near one end face of the toothbrush head; the motor body is fixed in the mounting body; a waterproof part is installed in the boss and is sleeved on the outer periphery of the connecting section, and the elastic sleeve is located between the waterproof part and the motor body; a through hole is opened on the boss for the flexible circuit board to pass through.

6. The electric toothbrush according to claim 2, wherein The rigid circuit board elastically abuts against a side wall surface of the motor housing adjacent to the connecting section.

7. The electric toothbrush according to claim 6, wherein The electric toothbrush further includes an elastic pressure head, and the hard circuit board abuts against the side wall surface of the motor housing on the same side as the second side surface through the elastic pressure head.

8. The electric toothbrush according to claim 7, wherein The electric toothbrush also includes a motor bracket, the motor body is fixed in the motor bracket, the hard circuit board is fixedly installed on the peripheral side wall of the motor bracket facing away from the first side surface, the motor bracket is provided with a through hole corresponding to the deformation part, one end of the elastic pressure head is fixedly connected to the deformation part, and the other end passes through the through hole and abuts against the motor housing.

9. The electric toothbrush according to claim 8, wherein The rigid circuit board extends in a strip shape along the length direction of the motor bracket. The rigid circuit board also includes a fixing portion connected to the lower end of the deformable portion. The fixing portion is fixedly connected to the motor bracket. The width of the deformable portion is smaller than the width of the fixing portion.

10. The electric toothbrush according to any one of claims 2 to 9, characterized in that The electric toothbrush also includes a motor bracket and a main control board, the motor body is fixedly installed in the motor bracket, and the main control board is fixed to the side wall of the motor bracket facing away from the second side surface; the flexible circuit board includes a longitudinal extension section and a transverse extension section, the longitudinal extension section extends along the length direction of the motor bracket, and one end of the longitudinal extension section is electrically connected to the hard circuit board, and the other end is connected to the transverse extension section; the transverse extension section extends along the bottom surface of the motor body and is electrically connected to the main control board.

11. The electric toothbrush according to claim 10, wherein The electric toothbrush further includes a power supply unit disposed below the motor body. The transverse extension section is disposed between the motor body and the power supply unit and is plugged into the main control board.

12. The electric toothbrush according to any one of claims 1 to 9, characterized in that The electric toothbrush also includes a handle shell, a bottom cover assembly and an overpressure prompt module. The bottom cover assembly is fixed to the bottom end of the handle shell, the motor body and the pressure sensing module are installed in the handle shell, and the connecting section extends out of the handle shell to connect with the brush head body; the overpressure prompt module is installed on the bottom cover assembly to issue a prompt message after the pressure value detected by the pressure sensor exceeds a threshold value.

13. The electric toothbrush according to claim 12, wherein The overpressure prompt module includes a light board, the bottom cover assembly has a light-transmitting window exposed from the brush handle housing, and the light board is used to emit a prompt light toward the light-transmitting window when the pressure value detected by the pressure sensor exceeds a threshold value.

14. The electric toothbrush according to claim 13, wherein The light-transmitting window is in a ring shape extending around the outer circumference of the brush handle housing.

15. The electric toothbrush according to claim 14, wherein The bottom cover assembly includes a light-transmitting shell and a bottom plate. The light-transmitting shell includes an annular base and an embedded surrounding wall connected to the upper end of the annular base. The embedded surrounding wall is embedded in the inner cavity of the brush handle shell. The outer peripheral wall of the annular base is spliced ​​with the outer peripheral wall of the brush handle shell to form the light-transmitting window. The bottom plate is fixed to the bottom of the annular base and covers the hollow area of ​​the annular base. The light board is fixed in the cavity formed by the light-transmitting shell and the bottom plate.

16. The electric toothbrush according to claim 12, wherein The overpressure prompt module also includes a speaker. The bottom cover assembly has a sound hole connected to the outside. The speaker is used to issue a voice prompt toward the sound hole after the pressure value detected by the pressure sensor exceeds a threshold.

17. The electric toothbrush according to claim 16, wherein The bottom cover assembly is formed with an installation cavity and a sound outlet cavity which are interconnected. The speaker is installed in the installation cavity, and the sound outlet portion of the speaker is arranged toward the sound outlet cavity. The sound outlet hole is connected to the sound outlet cavity, and a waterproof and breathable membrane covering the sound outlet hole is provided in the sound outlet cavity.

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