Control method of electric toothbrush and electric toothbrush

Abstract

The invention provides a control method of an electric toothbrush and the electric toothbrush, the electric toothbrush comprises a sound wave mode and a rotation mode, and the electric toothbrush can be switched between the sound wave mode and the rotation mode.

Description

Technical Field

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

[0002] Different electric toothbrushes have different functional principles. Sonic electric toothbrushes and rotary electric toothbrushes are two types of electric toothbrushes with different functional principles. Sonic electric toothbrushes mainly rely on high-frequency vibration to drive the toothbrush head to swing at high speed, and rotary electric toothbrushes mainly rely on motors to drive the circular brush head to rotate. The motor outputs of these two types of electric toothbrushes have different motion forms.

[0003] CN116348062A discloses a personal care system and method. The personal care appliance therein includes a motor having a drive shaft. In response to a voltage signal, the drive shaft oscillates with an oscillating motion having an oscillation amplitude. The control circuit includes an operable cooperative user interface, a processor, a pulse width modulation signal generator, and a power supply. The control circuit supplies a voltage signal to the motor, and the voltage signal has a frequency and a duty cycle. The control circuit changes the frequency and duty cycle of the voltage signal in response to an oscillation adjustment input received from the user interface, so that the oscillation amplitude of the drive shaft changes along a substantially linear rate of change curve relative to the frequency. The purpose of CN116348062A is to provide an electric toothbrush with an oscillating motion that can be smoothly and continuously adjusted from one intensity to another without steps or jumps in the oscillation. It does not integrate the sonic electric toothbrush and the rotary electric toothbrush together.

[0004] CN208319355U discloses an electric toothbrush with alternating vibration modes. The electric toothbrush with alternating vibration modes includes a handle and a toothbrush head, the handle has a built-in controller and a motor, the toothbrush head is connected to the motor, and the motor drives the toothbrush head to vibrate in rotation or linearly at different times under the control of the controller. The toothbrush head can vibrate in a linear or rotational manner under the drive of the motor, and the toothbrush head can switch from linear vibration to rotational vibration or from rotational vibration to linear vibration under the action of the controller.

[0005] The motor used in CN208319355U is a driving motor that can output rotational vibration or linear vibration respectively. Under the control of the controller, the motor can drive the toothbrush head to rotate and vibrate or to vibrate linearly at different time periods. The motor and the toothbrush head are connected through a mode switching mechanism, which is electrically connected to the controller, and the mode switching mechanism is used to switch the toothbrush head between linear vibration and rotational vibration modes under the control of the controller. Generally, the structures of vibrating toothbrush heads and rotating toothbrush heads are different, and CN208319355U does not disclose or suggest the switching of toothbrush heads.

[0006] CN210044170U discloses an electric toothbrush, which includes: a body; a brush head; a brush rod; a brush handle, the brush handle is connected to the other end of the brush rod and has a first accommodating space inside, wherein the brush handle includes: a bracket; a motor, the motor is fixed to the bracket through a connecting member, and the motor includes a first oscillator and a second oscillator; a control circuit board, the control circuit board is connected to the motor, the control circuit board includes a first circuit and a second circuit, wherein the first circuit controls the first oscillator, and the second circuit controls the second oscillator; a vibration transmission shaft, through which the brush head is driven to vibrate. It has two sound wave modes, the first sound wave mode is an axial reciprocating mode, and the second sound wave mode is an axial rotation mode. The motor used is a dual-core motor.

[0007] Similar to CN208319355U, CN210044170U does not disclose or suggest switching of toothbrush heads. Summary of the invention

[0008] This application is made in view of the above-mentioned state of the prior art. The purpose of this application is to provide a control method of an electric toothbrush and an electric toothbrush.

[0009] The embodiment of the present application provides a control method of an electric toothbrush, wherein the electric toothbrush comprises a sonic mode and a rotation mode, and the electric toothbrush can switch between the sonic mode and the rotation mode.

[0010] In at least one possible implementation, the acoustic wave mode and the rotation mode are switched by means of strain.

[0011] In at least one possible implementation manner, the sound wave mode and the rotation mode are switched via a gear shift button and / or an identification point.

[0012] In at least one possible embodiment, the electric toothbrush comprises a toothbrush handle, a sonic toothbrush head and a rotating toothbrush head, the toothbrush handle is provided with an identification point, the sonic toothbrush head and the rotating toothbrush head are provided with identification objects having different identification features,

[0013] When the sonic toothbrush head or the rotating toothbrush head is mounted on the toothbrush handle,

[0014] When the sonic toothbrush head is installed on the toothbrush handle, the identification point transmits a first signal to a control system in the toothbrush handle. After receiving the first signal, the control system adjusts the working mode of the electric toothbrush to the sonic mode.

[0015] When the rotating toothbrush head is installed on the toothbrush handle, the identification point transmits a second signal to the control system in the toothbrush handle, and after receiving the second signal, the control system adjusts the working mode of the electric toothbrush to the rotation mode.

[0016] In at least one possible embodiment, when the working mode of the electric toothbrush is the sonic mode, the bristles of the sonic toothbrush head reciprocate along the length direction of the electric toothbrush;

[0017] When the working mode of the electric toothbrush is a rotation mode, the bristles of the rotating toothbrush head reciprocate around an axis extending along the front-rear direction of the electric toothbrush.

[0018] In at least one possible implementation, compared to when the rotary toothbrush head is installed on the toothbrush handle, when the sonic toothbrush head is installed on the toothbrush handle, the movement frequency of the motor inside the toothbrush handle is higher.

[0019] In at least one possible implementation, when the working mode of the electric toothbrush is the sonic mode, the vibration frequency corresponding to the sonic toothbrush head is 150 to 450 Hz.

[0020] In at least one possible implementation, when the working mode of the electric toothbrush is the rotation mode, the vibration frequency corresponding to the rotating toothbrush head is 40 to 150 Hz.

[0021] In at least one possible implementation, the identification point and the identification object are identified in a manner including physical contact point identification, circuit connection identification, radio frequency tag identification, optical identification, or near field communication identification.

[0022] In at least one possible embodiment, the electric toothbrush control method further includes: after powering on, judging whether a toothbrush head is installed on the toothbrush handle based on the interaction between the identification point and the identification object, and prompting to install a toothbrush head when the identification object is not identified.

[0023] In at least one possible implementation, the electric toothbrush control method further includes: when it is recognized that the sonic toothbrush head or the rotary toothbrush head is installed on the toothbrush handle, the electric toothbrush outputs a recognition result.

[0024] The embodiment of the present application further proposes an electric toothbrush, using the control method of the electric toothbrush described in any one of the above technical solutions, wherein the electric toothbrush comprises a toothbrush handle, a sonic toothbrush head and a rotating toothbrush head.

[0025] A tenon is protruded from one end of the toothbrush handle, and the tenon includes a first support segment and a second support segment, the second support segment surrounds the base end of the first support segment, and the first support segment can move relative to the second support segment. A motor is arranged inside the toothbrush handle, and the output end of the motor is connected to the first support segment to drive the first support segment to move relative to the second support segment.

[0026] In at least one possible embodiment, when the sonic toothbrush head is installed on the toothbrush handle, the first supporting section is cooperatively connected with the sonic toothbrush head, and there is a gap between the second supporting section and the sonic toothbrush head, so that the motor can drive the sonic toothbrush head to vibrate via the first supporting section.

[0027] In at least one possible embodiment, the rotating toothbrush head includes a brush rod shell, a connecting rod and a round brush head, wherein the connecting rod is arranged inside the brush rod shell, the round brush head can be rotatably connected to the brush rod shell relative to the brush rod shell, and the head end of the connecting rod is connected to the round brush head.

[0028] When the rotating toothbrush head is mounted on the toothbrush handle, the tail end of the connecting rod is connected to the first supporting section, the connecting rod and the round brush head form a crank rocker mechanism, and the brush rod shell is connected to the second supporting section.

[0029] The beneficial effects of the electric toothbrush of the present application include: the electric toothbrush can automatically switch to different working modes according to the types of installed brush heads, without the need to manually adjust the working mode suitable for the installed brush head type, making the electric toothbrush easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a side view of a toothbrush handle of one embodiment of the electric toothbrush of the present application;

[0032] Figure 2 yes Figure 1 A partial enlarged view of the electric toothbrush at point A;

[0033] Figure 3 is a partial three-dimensional view of a toothbrush handle of an embodiment of the electric toothbrush of the present application;

[0034] Figure 4is a partial three-dimensional view of a toothbrush handle of an embodiment of the electric toothbrush of the present application;

[0035] Figure 5 is a partial three-dimensional view of a toothbrush handle of an embodiment of the electric toothbrush of the present application;

[0036] Figure 6 is a three-dimensional view of a sleeve of an embodiment of an electric toothbrush of the present application;

[0037] Figure 7 is a longitudinal sectional view of the electric toothbrush of the present application in a first usage state;

[0038] Figure 8 yes Figure 7 A partial enlarged view of point B of the electric toothbrush;

[0039] Fig. 9 is a longitudinal sectional view of the electric toothbrush of the present application in a second usage state;

[0040] Fig.10 It is a longitudinal sectional view of the electric toothbrush of the present application in a second usage state.

[0041] Fig.11 It is a flow chart of the control method of the electric toothbrush of the present application.

[0042] Fig.12 It is a coordinate diagram showing the relationship between the cleaning effect and time of the electric toothbrush using the sonic toothbrush head of the present application.

[0043] Fig.13 It is a coordinate diagram showing the relationship between the cleaning effect and time of the electric toothbrush using a rotating toothbrush head of the present application.

[0044] Description of Reference Numerals

[0045] 1-bottom cover assembly; 2-battery; 3-PCB board; 4-shading member; 5-motor; 6-handle shell; 7-sonic toothbrush head; 8-rotating toothbrush head; 81-connecting rod; 82-round brush head; 83-brush rod shell; 84-second male buckle; 85-positioning hole; 9-first supporting section; 91-cut surface; 92-female buckle; 93-chamfered corner; 94-convex curved surface; 10-second supporting section; 101-inward surface; 102-stop portion; 104-third male buckle; 11-sleeve; 111-assembly hole; 112-convex rib; 113-raised portion; 114-window hole; 115-ramp platform; 116-first male buckle; 12-gap; 13-through hole. DETAILED DESCRIPTION

[0046] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0047] Hereinafter, the length direction of the electric toothbrush is also referred to as the longitudinal direction or axial direction, which corresponds to the X direction in the accompanying drawings; the extending direction of the bristles of the toothbrush head is referred to as the front-to-back direction, which corresponds to the Y direction in the accompanying drawings. Figure 1 , Figure 7 It can be seen that some operating buttons can be set on the front side of the toothbrush handle, which can be the side where the bristles contact the teeth; the direction of the electric toothbrush that is perpendicular to the above-mentioned length direction and front-to-back direction is called the lateral or left-right direction, which is consistent with the Z direction in the accompanying drawing.

[0048] See also Figure 2 , Figure 3 , Figure 4 , Figure 7 , Fig. 9 The embodiment of the present application provides an electric toothbrush, which can be a sonic and rotary dual-purpose electric toothbrush. The electric toothbrush includes a toothbrush handle and a toothbrush head. Figure 1 The toothbrush handle shown in the figure has a complete handle with a protruding tenon at one end. Figure 2 As shown, the tenon includes a first support section 9 and another section is a second support section 10. The toothbrush head is replaceable and selectable. The toothbrush head includes a sonic toothbrush head 7 and a rotating toothbrush head 8. The sonic toothbrush head 7 or the rotating toothbrush head 8 can be selected to be installed on the toothbrush handle. The first support section 9 corresponds to the sonic toothbrush head 7, and the second support section 10 corresponds to the rotating toothbrush head 8. Fig. 9 As shown, the rotating toothbrush head 8 comprises at least a brush rod shell 83 and a round brush head 82. A connecting rod 81 is arranged inside the brush rod shell 83. The round brush head 82 can be rotatably connected to the brush rod shell 83 relative to the brush rod shell 83. The head end of the connecting rod 81 ( Fig. 9 The upper end of the connecting rod 81 is connected to the round brush head 82. When the rotating toothbrush head 8 is installed on the toothbrush handle, the tail end of the connecting rod 81 ( Fig. 9 The lower end of the brush rod 81 is connected to the first supporting section 9, the connecting rod 81 and the round brush head 82 constitute a crank rocker mechanism, and the brush rod housing 83 is connected to the second supporting section 10.

[0049] The first support section 9 can be assembled with the connecting rod 81 inside the rotating toothbrush head 8, and the second support section 10 is assembled with the brush rod shell of the rotating toothbrush head 8. The crank rocker mechanism will convert the lateral swing of the first support section 9 into the rotational movement of the round brush head (bristles) of the rotating toothbrush head around its central axis (the axis extending along the front-back direction Y of the electric toothbrush), while the relative position of the second support section 10 and the brush rod shell of the rotating toothbrush head 8 remains unchanged, so that the normal operation of the crank rocker mechanism can be ensured, and the brush rod shell 83 of the rotating toothbrush head 8 can be kept stable. It can be understood that the bristles of the rotating toothbrush head driven by the crank rocker mechanism can reciprocate within a certain angle range (for example, within the range of 0 to 5 degrees to 0 to 60 degrees), rather than continuous unidirectional rotation.

[0050] The second support segment 10 surrounds the base end of the first support segment 9 ( Figure 2 The first support segment 9 is configured to have a lower end portion, and the front end portion of the first support segment 9 is exposed from the second support segment 10. The first support segment 9 can move relative to the second support segment 10.

[0051] like Figure 7 , Figure 8 As shown, when the first support segment 9 is assembled with the sonic toothbrush head 7, the first support segment 9 has a lateral (corresponding to the Z direction in the figure) vibration freedom relative to the second support segment 10, and the longitudinal direction along the length of the electric toothbrush (corresponding to the X direction in the figure) is the longitudinal direction. The lateral in the lateral vibration freedom here refers to the direction perpendicular to the longitudinal direction (corresponding to the X direction in the figure) and the front-to-back direction (corresponding to the Y direction in the figure). The lateral direction can also be called the left-right direction. Fig. 9 , Fig.10 As shown, Fig.10 Compared with the viewing angle Fig. 9 The viewing angle is rotated 90°. When the second support segment 10 is assembled with the rotating toothbrush head 8, the second support segment 10 is assembled with the brush rod shell 83 and the first support segment 9 is assembled with the connecting rod 81. The first support segment 9 has a lateral vibration (or swing) degree of freedom relative to the second support segment 10. That is, whether the sonic toothbrush head 7 or the rotating toothbrush head 8 is in operation, the first support segment 9 moves relative to the second support segment 10. The structures of the first support segment 9 and the second support segment 10 are simple and reliable, and the assembly with the sonic toothbrush head 7 and the rotating toothbrush head 8 is also easy to achieve.

[0052] In one embodiment, the first support section 9 and the sonic toothbrush head 7 are assembled by interference fit or snap fit. The second support section 10 and the rotary toothbrush head 8 are assembled by interference fit or snap fit.

[0053] Regardless of whether interference fit or snap fit is selected, the main purpose is to ensure that the sonic toothbrush head 7, the rotating toothbrush head 8 and the tenon can be quickly disassembled, replaced and fixed in position.

[0054] like Figure 2 As shown, in one embodiment, the first support segment 9 as a whole (or the front end of the first support segment 9) is closer to the top of the toothbrush handle (the end close to the toothbrush head) than the second support segment 10. In other words, the longitudinal distance from the first support segment 9 to the centroid of the toothbrush handle is greater than the longitudinal distance from the second support segment 10 to the centroid of the toothbrush handle, that is, the second support segment 10 is located at the root of the tenon, and the first support segment 9 is located at the top of the tenon, that is, the second support segment 10 is located at a lower position in the longitudinal direction (which can correspond to the X direction in the accompanying drawings) relative to the first support segment 9. In addition, the lateral dimension and the front direction dimension of the second support segment 10 are also larger than the lateral dimension and the front direction dimension of the first support segment 9, respectively. This ensures that the two different types of toothbrush heads have their own dedicated installation positions and ensures accurate installation.

[0055] like Figure 3 , Figure 4 As shown, the second support segment 10 has a through hole 13 for the first support segment 9 to move through, and the inner diameter of the through hole 13 is larger than the outer diameter of the first support segment 9. Because the first support segment 9 can move relative to the second support segment 10, the through hole 13 leaves space for the movement of the first support segment 9, does not restrict the vibration (swinging movement) of the first support segment 9, and also leaves some space in the radial direction to ensure that the first support segment 9 can vibrate smoothly.

[0056] In one embodiment, when the first support section 9 is assembled with the sonic toothbrush head 7, there is a gap between the second support section 10 and the sonic toothbrush head 7 at least in the lateral direction. Figure 8 As shown, there is also a gap 12 between the second support section 10 and the sonic toothbrush head 7 in the front-to-back direction. The sonic toothbrush head 7 can cover the second support section 10 at intervals, or it can not cover the position of the second support section 10. When the electric toothbrush is working, the bristles of the sonic toothbrush head 7 can reciprocate along the length direction X of the electric toothbrush. The brush rod of the sonic toothbrush head 7 itself can be an integrated structure. During the vibration of the sonic toothbrush head 7, its two ends often shake with a large amplitude. These gaps can prevent the second support section 10 from interfering with the vibrating sonic toothbrush head 7, thereby ensuring the smoothness and stability of the vibration.

[0057] like Figure 3 , Figure 4As shown, in one embodiment, the first support section 9 includes a flattened section, the outer wall of the flattened section includes a convex curved surface 94 and a flattened surface 91, the flattened surface 91 is parallel to the length direction of the first support section 9 (corresponding to the X direction in the figure), and the cross-sectional profile of the flattened section can be D-shaped, that is, an arcuate shape including a semicircle. A female buckle 92 is recessed on the convex curved surface 94 to realize snap-fit ​​assembly with the sonic toothbrush head 7.

[0058] The first supporting section 9 is not a regular cylindrical shape. The special cross-sectional shape of the first supporting section 9 can limit the tendency of rotation and loosening about the axis of the tenon itself after the tenon and the toothbrush head are assembled.

[0059] like Figure 3 , Figure 4 As shown, in one embodiment, the top of the first supporting section 9, that is, the top of the tenon, has a chamfer 93, which can reduce the alignment accuracy when the tenon is assembled with different toothbrush heads.

[0060] like Figure 6 , Figure 7 , Figure 8 As shown, in one embodiment, a sleeve 11 is arranged between the first supporting section 9 and the sonic toothbrush head 7, and the outer wall of the sleeve 11 has a convex rib 112, the length direction of the convex rib 112 (which can correspond to the X direction in the figure) is parallel to the axial direction of the sleeve 11 (which can correspond to the X direction in the figure), and the convex rib 112 has a protrusion 113, and the top of the protrusion 113 is interference fitted with the sonic toothbrush head 7.

[0061] The sleeve 11 is convenient for changing the outer contour shape of the first supporting section 9 in the tenon so as to facilitate assembly with a specific sonic toothbrush head 7 .

[0062] like Figure 6 As shown, a pair of ribs 112 are distributed on both sides of the sleeve 11 in mirror symmetry, and each rib 112 has two raised portions 113, which is equivalent to having four raised portions 113 for interference fit. The cross-sectional profile of the ribs 112 and the raised portions 113 can be rectangular.

[0063] The inner wall of the sonic toothbrush head 7 is provided with two clamping grooves, and the distance between the two clamping grooves is designed to be slightly smaller than the width between the two convex ribs 112 of the sleeve 11. When the sonic toothbrush head 7 is installed, the clamping groove needs to be appropriately expanded outward to adapt to the width of the tenon after the sleeve 11 is sleeved. This design ensures close contact between the sonic toothbrush head 7 and the tenon, making the sonic toothbrush head 7 more stable during use and reducing the risk of loosening and falling.

[0064] like Figure 6 As shown, in one embodiment, one end of the sleeve 11 is provided with an assembly hole 111 for the first support section 9 to enter. Figure 8 As shown, the inner wall of the assembly hole 111 protrudes with a first male buckle 116, and the first male buckle 116 can be snap-fitted and assembled with the female buckle 92. Figure 6 , Figure 8 As shown, the inner wall of the assembly hole 111 also protrudes with a ramp 115, and the ramp 115 can contact the cut surface 91. The inclined surface of the ramp 115 faces the opening direction of the assembly hole 111, and the inclined surface of the ramp 115 guides the tenon to move slightly in the front-back direction, and finally the top of the ramp 115 abuts against the cut surface 91 of the tenon, thereby achieving the effect of firmly assembling the first male buckle 116 and the female buckle 92.

[0065] like Figure 6 As shown, in one embodiment, the sleeve 11 has a window hole 114 that passes through the inside and outside. The window hole 114 is convenient for destroying the blind hole feature of the assembly hole 111, so that the first support section 9 can smoothly enter the assembly hole 111.

[0066] like Figure 3 , Figure 4 As shown, in one embodiment, the outer wall of the second support section 10 includes a plurality of outwardly protruding stop portions 102, which are arranged in a mirror-symmetrical manner or in a ring array around the center line of the second support section 10, and the stop portions 102 are interference-fitted with the rotating toothbrush head 8. The stop portions 102 are used to limit the shaking of the rotating toothbrush head 8 and improve stability during use.

[0067] The length direction of the stop portion 102 (which may correspond to the X direction in the accompanying drawings) may be parallel to the length direction of the second support segment 10 (which may correspond to the X direction in the accompanying drawings), and the end of the stop portion 102 facing the first support segment 9 may be chamfered, and the chamfer is to facilitate the assembly of the second support segment 10 and the rotatable toothbrush head 8. The outer wall of the second support segment 10 also has an inner face 101 that contracts radially inward at a position where there is no stop portion 102. The inner face 101 and the stop portion 102 may each have two, and the lateral distance between a pair of inner faces 101 is less than the lateral distance between a pair of stop portions 102. The inner face 101 does not contact the rotatable toothbrush head 8. In a non-limiting example, the direction of the line between the pair of stop portions 102 is perpendicular to the cut surface 91.

[0068] The second support section 10 may be an injection molded part. The second support section 10 may be an injection molded part integrally formed with the toothbrush handle body, that is, to ensure that the brush rod shell 83 of the rotating toothbrush head 8 and the toothbrush handle body are relatively fixed after installation.

[0069] like Fig. 9 As shown, in one embodiment, the surface of the connecting rod 81 of the rotating toothbrush head 8 is protruded with a second male buckle 84, and the second male buckle 84 can be snap-fitted and assembled with the female buckle 92. In this way, the connecting rod 81 can move synchronously with the first supporting section 9.

[0070] In addition, if Fig. 9 As shown, the side of the second support section 10 may be protruded with a third male buckle 104, and the brush rod shell 83 is provided with a positioning hole 85, and the third male buckle 104 may be snap-fitted and assembled with the positioning hole 85. The third male buckle 104 and the positioning hole 85 can provide a more secure limiting capability. Whether it is the snap-fitting assembly of the first male buckle 116 and the female buckle 92, the snap-fitting assembly of the second male buckle 84 and the female buckle 92, or the snap-fitting assembly of the third male buckle 104 and the positioning hole 85, they all belong to mechanical locking, which can prevent the toothbrush head from rotating or loosening during use. In particular, when the user installs the sonic toothbrush head 7 or the rotating toothbrush head 8, he will also feel an obvious sense of jamming to remind the user that the toothbrush head has been correctly installed in place. The third male buckle 104 is equivalent to a supplement to the function of the stopper 102.

[0071] In one embodiment, an identification point is provided on the tenon, and the sonic toothbrush head 7 and the rotating toothbrush head 8 are provided with identification objects with different identification features, and the identification point (control system) can identify the identification objects with different identification features, thereby determining whether the sonic toothbrush head 7 or the rotating toothbrush head 8 is installed on the toothbrush handle. The identification principle of the identification point includes but is not limited to physical contact point identification, circuit connection identification, RFID (Radio Frequency Identification), optical identification, and NFC (Near Field Communication).

[0072] Among them, physical contact point identification can be achieved by setting an electrical contact point (such as a metal contact) on the tenon, and the sonic toothbrush head 7 and the rotating toothbrush head 8 can use different contact methods or electrical connection schemes. The tenon connection part of the handle and the connecting end of the brush head can be designed as different electrical contact points (such as metal contacts), and different brush head designs have different contact methods or electrical connection schemes. For example, different electrical contact points can have different resistances, and the sonic toothbrush head 7 and the rotating toothbrush head 8 can have different resistance values ​​at the electrical contact points where they contact the identification points. For another example, different electrical contact points can have different inductances, and the inside of the toothbrush handle can have an inductance sensor, which can detect the inductance of the electrical contact points of the toothbrush head, and the sonic toothbrush head 7 and the rotating toothbrush head 8 can have different inductance responses.

[0073] The principle of radio frequency tag identification is contactless data communication between the reader and the tag to achieve the purpose of identifying the target, that is, the tenon and the toothbrush head can be equipped with a reader and a tag at designated positions respectively.

[0074] Near field communication identification is developed based on contactless radio frequency identification technology and combined with wireless interconnection technology. Near field refers to radio waves near electromagnetic fields. The arrangement position of the identification point can be on the cut plane 91, and the cut plane 91 has a relatively sufficient plane for arrangement. Specifically, the identification point of a certain principle can be selected according to actual needs.

[0075] like Figure 7 As shown, the outer surface of the toothbrush handle is wrapped by a handle shell 6. In the direction toward the toothbrush head, the handle shell 6 is provided with a bottom cover assembly 1, a battery 2, and a motor 5 in sequence. A PCB board 3 is provided on the same side of the battery 2 and the motor 5. The PCB board 3 is located inside the handle shell 6. The PCB board 3 is also covered with a shading member 4, which facilitates forming a hidden panel.

[0076] The motor 5 is connected to a power rod, which passes through the second support section 10. The part exposed from one end of the second support section 10 is the first support section 9 of the tenon. Here, the part of the power rod connected to the first support section 9 and located in the second support section 10 can be called the base end of the first support section 9. The motor 5 at least has the function of driving the power rod to vibrate.

[0077] Optionally, the PCB board 3 may be provided with a gear switching button, which may be exposed on the surface of the toothbrush handle. When the toothbrush handle is equipped with a rotating toothbrush head 8 and the gear switching button is triggered, the control system can adjust the operating parameters of the motor 5 (for example, adjust the movement amplitude of the power rod of the motor) to switch the working mode of the electric toothbrush to the sweeping vibration mode. In the sweeping vibration mode, the rotating toothbrush head 8 can alternately rotate and vibrate. The modes of button switching and identification point switching can be collectively referred to as overstrain mode switching.

[0078] In a non-limiting example, when the sonic toothbrush head 7 is mounted on the toothbrush handle, the motor 5 inside the toothbrush handle moves at a higher frequency than when the rotary toothbrush head 8 is mounted on the toothbrush handle. The vibration frequency of the motor or the component driven by the motor may be 40-450 Hz, the corresponding vibration frequency of the sonic toothbrush head may be 150-450 Hz, and the corresponding vibration frequency of the rotary toothbrush head may be 40-150 Hz. The frequency of the electric toothbrush can be adjusted to select whether to work in sonic mode or rotary mode.

[0079] When the electric toothbrush is in sonic mode, the motor transmits high-frequency vibrations of 150 to 450 Hz to the bristles of the sonic toothbrush head 7, so that the bristles can vibrate in the left and right directions. During the vibration of the sonic toothbrush head 7, the bristles can vibrate at a high frequency, contact the tooth surface and the gaps between the teeth, and efficiently remove dental plaque and food residues through a smaller movement amplitude and higher frequency vibration. The sonic mode is suitable for daily cleaning and sensitive tooth care.

[0080] When the electric toothbrush is in the rotation mode, the motor will drive the rotating toothbrush head 8 to rotate 360 ​​degrees on the tooth surface to rub the tooth surface. During the rotation of the rotating toothbrush head 8, the bristles can contact the tooth surface in all directions, which is particularly suitable for cleaning the surface spots and gum line of the teeth, and the cleaning force is strong. The rotation mode is suitable for areas that are difficult to clean and deep cleaning.

[0081] When testing the cleaning power, paint can be applied on the surface of the teeth to simulate dental plaque. The cleaning effect of the electric toothbrush can be measured by the proportion of the area of ​​paint brushed off by the toothbrush head at different vibration frequencies of the motor within a specific period of time.

[0082] Table 1 shows the area ratio of the paint brushed off by the toothbrush head at different vibration frequencies of the motor within a specific time when a sonic toothbrush head 7 is installed on the toothbrush handle and the electric toothbrush is in sonic mode and a rotating toothbrush head 8 is installed on the toothbrush handle and the electric toothbrush is in rotating mode.

[0083] Table 1

[0084]

[0085]

[0086] exist Fig.12 and Fig.13 In the figure, the horizontal axis represents time, and the vertical axis represents the area of ​​the pigment applied on the tooth surface to simulate dental plaque. Fig.12 The curve in FIG. 4 shows that the motor frequency is 400 Hz, and the area of ​​the pigment remaining on the tooth surface after brushing teeth for different times using the sonic toothbrush head 7. Specifically, when the sonic toothbrush head 7 is used to clean teeth for 440 seconds, the area of ​​the pigment is reduced from 12 square millimeters to 1 square millimeter.

[0087] Fig.13 The curve in FIG. 1 shows that the motor frequency is 100 Hz, and the area of ​​the pigment remaining on the tooth surface after brushing teeth for different times using the rotary toothbrush head 8. Specifically, when the rotary toothbrush head 8 is used to clean teeth for 440 seconds, the area of ​​the pigment is reduced from 12 square millimeters to 1.7 square millimeters.

[0088] The operation mode of the first embodiment of the electric toothbrush of the present application is as follows:

[0089] Step S101, installing the sonic toothbrush head 7: the user installs the sonic toothbrush head 7 on the tenon of the toothbrush handle. The sonic toothbrush head 7 is tightly fitted with the first support section 9 through interference fitting. Step S102, brush head type identification: because the tenon is designed with an identification point, the toothbrush handle can identify the type of brush head installed. Step S103, signal transmission: after identifying the sonic toothbrush head 7, the tenon sends a first signal to the control system in the toothbrush handle. Step S104, mode adjustment: after receiving the first signal, the control system adjusts the working mode of the electric toothbrush to adapt to the needs of the sonic toothbrush head 7. The control system sets appropriate parameters such as speed, angle and torque to ensure the best cleaning effect. Step S105, starting the electric toothbrush: the user presses the start button of the electric toothbrush, the electric toothbrush starts working, and the control system drives the motor 5 to operate in the set state according to the previously adjusted mode.

[0090] The operation mode of the second embodiment of the electric toothbrush of the present application is as follows:

[0091] Step S201, installing the rotating toothbrush head 8: the user installs the rotating toothbrush head 8 on the tenon of the toothbrush handle. Different parts of the rotating toothbrush head 8 are closely matched with the second support section 10 and the first support section 9 respectively. Step S202, brush head type identification: since the tenon is designed with an identification point, the toothbrush handle can identify the type of brush head installed. Step S203, signal transmission: after identifying the rotating toothbrush head 8, the tenon sends a second signal to the control system in the toothbrush handle. Step S204, mode adjustment: after receiving the second signal, the control system adjusts the working mode of the electric toothbrush to adapt to the needs of the rotating toothbrush head 8. The control system sets appropriate parameters such as speed, angle and torque to ensure the best cleaning effect. Step S205, start the electric toothbrush: the user presses the start button of the electric toothbrush, the electric toothbrush starts working, and the control system drives the motor to operate in the set rotation mode according to the previously adjusted mode.

[0092] Optionally, when it is recognized that the toothbrush handle is installed with a sonic toothbrush head 7 or a rotating toothbrush head 8, the electric toothbrush can output the recognition result, for example, by prompting the user to the type of toothbrush head installed through voice, display screen, or light.

[0093] It can be understood that if after the electric toothbrush is turned on, based on the interaction between the identification point and the identification object, it is judged whether a toothbrush head is installed on the toothbrush handle, and the identification point does not recognize the identification feature, it can be judged that the toothbrush handle has neither a sonic brush head nor a rotating brush head installed. In this case, the toothbrush handle can prompt the user to install a toothbrush head through light, sound, display screen, etc.

[0094] The electric toothbrush of the present application can automatically switch between different working modes according to the types of brush heads installed on the toothbrush handle, without the need to manually adjust the working mode suitable for the type of brush head installed, making the electric toothbrush easy to operate.

[0095] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with this technology to understand the content of the present application and implement it. They cannot be used to limit the scope of protection of the present application. All equivalent changes or modifications made according to the spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A control method for an electric toothbrush, characterized in that: The electric toothbrush comprises a sonic mode and a rotation mode, and the electric toothbrush can be switched between the sonic mode and the rotation mode.

2. The control method of the electric toothbrush according to claim 1, characterized in that: The acoustic wave mode and the rotation mode are switched by means of strain.

3. The control method of the electric toothbrush according to claim 1, characterized in that: The sonic mode and the rotation mode are switched via a gear shift button and / or an identification point.

4. The control method of the electric toothbrush according to claim 1, characterized in that: The electric toothbrush comprises a toothbrush handle, a sonic toothbrush head (7) and a rotating toothbrush head (8), wherein the toothbrush handle is provided with an identification point, and the sonic toothbrush head (7) and the rotating toothbrush head (8) are provided with identification objects having different identification features. When the sonic toothbrush head (7) or the rotating toothbrush head (8) is mounted on the toothbrush handle, When the sonic toothbrush head (7) is installed on the toothbrush handle, the identification point transmits a first signal to a control system in the toothbrush handle, and after receiving the first signal, the control system adjusts the working mode of the electric toothbrush to the sonic mode. When the rotating toothbrush head (8) is installed on the toothbrush handle, the identification point transmits a second signal to a control system in the toothbrush handle, and after receiving the second signal, the control system adjusts the working mode of the electric toothbrush to a rotating mode.

5. The control method of the electric toothbrush according to claim 4, characterized in that: When the working mode of the electric toothbrush is the sonic mode, the bristles of the sonic toothbrush head (7) reciprocate along the length direction (X) of the electric toothbrush; When the working mode of the electric toothbrush is the rotation mode, the bristles of the rotating toothbrush head (8) reciprocate around an axis extending along the front-rear direction (Y) of the electric toothbrush.

6. The control method of the electric toothbrush according to claim 4, characterized in that: Compared with the installation of the rotating toothbrush head (8) on the toothbrush handle, when the sonic toothbrush head (7) is installed on the toothbrush handle, the movement frequency of the motor (5) inside the toothbrush handle is higher.

7. The control method of the electric toothbrush according to claim 4, characterized in that: When the working mode of the electric toothbrush is the sonic mode, the corresponding vibration frequency of the sonic toothbrush head (7) is 150 to 450 Hz.

8. The control method of the electric toothbrush according to claim 4, characterized in that: When the working mode of the electric toothbrush is the rotation mode, the corresponding vibration frequency of the rotating toothbrush head (8) is 40 to 150 Hz.

9. The control method of the electric toothbrush according to claim 4, characterized in that: The identification point and the identification object may be identified by physical contact point identification, circuit connection identification, radio frequency tag identification, optical identification or near field communication identification.

10. The control method of the electric toothbrush according to claim 4, characterized in that: The electric toothbrush control method further includes: after powering on, judging whether a toothbrush head is installed on the toothbrush handle based on the interaction between the identification point and the identification object, and prompting to install a toothbrush head when the identification object is not identified.

11. The control method of the electric toothbrush according to claim 4, characterized in that: The electric toothbrush control method further comprises: when it is recognized that the sonic toothbrush head (7) or the rotating toothbrush head (8) is installed on the toothbrush handle, the electric toothbrush outputs a recognition result.

12. An electric toothbrush, characterized in that: A control method for an electric toothbrush according to any one of claims 1 to 11, wherein the electric toothbrush comprises a toothbrush handle, a sonic toothbrush head (7) and a rotating toothbrush head (8), A tenon is protruded from one end of the toothbrush handle, and the tenon includes a first support section (9) and a second support section (10), the second support section (10) surrounds the base end of the first support section (9), and the first support section (9) can move relative to the second support section (10). A motor (5) is arranged inside the toothbrush handle, and the output end of the motor (5) is connected to the first support section (9) to drive the first support section (9) to move relative to the second support section (10).

13. The electric toothbrush according to claim 12, characterized in that: When the sonic toothbrush head (7) is mounted on the toothbrush handle, the first supporting section (9) is cooperatively connected with the sonic toothbrush head (7), and a gap exists between the second supporting section (10) and the sonic toothbrush head (7), so that the motor (5) can drive the sonic toothbrush head (7) to vibrate via the first supporting section (9).

14. The electric toothbrush according to claim 12, characterized in that: The rotating toothbrush head (8) comprises a brush rod shell (83), a connecting rod (81) and a round brush head (82); the connecting rod (81) is arranged inside the brush rod shell (83); the round brush head (82) is rotatably connected to the brush rod shell (83) relative to the brush rod shell (83); the head end of the connecting rod (81) is connected to the round brush head (82); When the rotating toothbrush head (8) is mounted on the toothbrush handle, the tail end of the connecting rod (81) is connected to the first supporting section (9), the connecting rod (81) and the round brush head (82) form a crank rocker mechanism, and the brush rod shell (83) is connected to the second supporting section (10).

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