CN215384819U - Electric toothbrush controlled and adjusted through toothbrush head stress - Google Patents

Abstract

The utility model discloses an electric toothbrush controlled and adjusted by the stress of a toothbrush head, which comprises: the toothbrush comprises a toothbrush handle and a toothbrush head, wherein a support frame is arranged in the toothbrush handle, a driving device which is arranged in the support frame in a swinging mode and is used for driving the toothbrush head to vibrate, a circuit board which is arranged on the support frame and is used for controlling the driving device and a battery which is used for providing electric energy, a swinging support is arranged at the swinging end of the driving device, a first sensing device which is separated from a gap on one side of the swinging support is arranged on the circuit board, and a first resetting device is arranged between the circuit board and the side of the swinging support. The first sensing device drives the swing bracket to swing according to the stress of the toothbrush head to trigger the driving device to work, and the first reset device is arranged between the swing bracket and the circuit board to push the swing bracket to reset so as to realize the starting of the toothbrush head under the extrusion force, and the toothbrush head immediately stops when being loosened, so that the toothbrush head can be controlled to work at any time, and further, the opening at the entrance and the stopping at the exit are realized.

Description

Electric toothbrush controlled and adjusted through toothbrush head stress

The technical field is as follows:

the utility model relates to the field of electric toothbrushes, in particular to an electric toothbrush controlled and adjusted by the stress of a toothbrush head.

Background art:

the electric toothbrush makes the brush head generate high-frequency vibration through the quick rotation or vibration of the motor core, instantaneously decomposes the toothpaste into fine foam to deeply clean slits between teeth, and simultaneously, the vibration of the brush hair can promote the blood circulation of the oral cavity and has a massage effect on gum tissues.

Electric toothbrushes are divided into two main categories in principle: rotation and vibration. The rotating toothbrush has a simple principle, namely the motor drives the circular brush head to rotate, the friction effect is enhanced while the common tooth brushing action is carried out, the rotating toothbrush has high strength, the tooth surface is cleaned cleanly, the tooth gaps are relatively weak to clean, but the rotating toothbrush has large abrasion to teeth, and the long-term use is not recommended. The vibration type toothbrush is more complex, an electrically driven vibration motor is arranged in the vibration type toothbrush, the brush head can generate high-frequency swing perpendicular to the brush handle direction, but the swing amplitude is very small, generally about 5 mm for each of the upper part and the lower part, and the maximum swing amplitude in the industry is 6 mm. When the toothbrush is used for brushing teeth, on one hand, the brush head which swings at high frequency can efficiently finish the action of brushing teeth, on the other hand, the mixture of toothpaste and water in the oral cavity can generate a large amount of tiny bubbles by vibration for more than 30000 times per minute, and the pressure generated when the bubbles burst can deeply penetrate into gaps between teeth to clean dirt.

The existing electric toothbrush on the market is generally controlled by a button on a handle, a tooth brushing mode needs to be set before tooth brushing, the button is pressed to control the toothbrush to work during tooth brushing, although the vibration intensity of different tooth brushing modes is different, the tooth brushing time of each tooth brushing mode is fixed and cannot be stopped midway, and when the tooth brushing time needs to be stopped midway or prolonged midway, the tooth brushing time needs to be stopped midway, the tooth brushing time is started from the beginning again in the same time, the start of the toothbrush cannot be controlled randomly, the opening of the toothbrush at the entrance cannot be realized, and the stopping at the exit cannot be realized.

In view of the above, the present inventors propose the following.

The utility model has the following contents:

the utility model aims to overcome the defects in the prior art and provides an electric toothbrush which is controlled and adjusted through the stress of a toothbrush head.

In order to solve the technical problems, the utility model adopts the following technical scheme: this electric toothbrush who adjusts through toothbrush head atress control includes: toothbrush handle and toothbrush head, be provided with the support frame in the toothbrush handle, with but install in swingable mode in the support frame and be used for the drive toothbrush head vibrating drive arrangement, install in on the support frame and be used for control drive arrangement's circuit board and be used for providing the battery of electric energy, drive arrangement's swing end is provided with the swing support, be provided with on the circuit board with swing support one side clearance spaced apart first induction system, the circuit board with be provided with a resetting means between this side of swing support.

Furthermore, in the above technical solution, the other side of the swing bracket is provided with a third induction device and a fourth induction device which are separated by a gap, the third induction device and the fourth induction device are linearly connected with the circuit board through a key board, the third induction device and the fourth induction device are distributed in parallel along the long side of the toothbrush handle, and a second reset device is arranged between the key board and the swing bracket.

Further, in the above technical solution, the circuit board is further provided with a second sensing device spaced apart from the swing bracket by a gap, and the second sensing device and the first sensing device are longitudinally distributed in parallel along the long side of the toothbrush handle; swing support bilateral symmetry is provided with first elasticity conduction piece and second elasticity conduction piece, wherein, first elasticity conduction piece corresponds first induction system with second induction system separates in clearance each other, second elasticity conduction piece corresponds third induction system with fourth induction system separates in clearance each other.

Further, in the above technical solution, the first sensing device, the second sensing device, the third sensing device and the fourth sensing device are pressure sensing probes, pressure sensing resistors or touch buttons.

Further, in the above technical solution, the first sensing device, the second sensing device, the third sensing device and the fourth sensing device are conductive pins, the first elastic conductive sheet and the second elastic conductive sheet are both connected to an electrode of the driving device, and the swing bracket is an insulating member.

Further, in the above technical solution, the first and second reset devices are tower springs, the swing bracket is symmetrically formed with a first positioning protrusion and a second positioning protrusion for positioning the first and second reset devices, the circuit board and the keypad are respectively provided with a first mounting hole and a second mounting hole for mounting the first and second reset devices, and the bottom ends of the first and second reset devices are respectively bent and formed with a first U-shaped buckling portion and a second U-shaped buckling portion for inserting into the first mounting hole and the second mounting hole.

Furthermore, in the above technical solution, a convex bottom cover for installing the swing bracket is arranged at the lower end of the driving device, the swing bracket is sleeved on the convex bottom cover, a mounting seat for mounting and positioning the support frame is arranged at the lower end of the swing bracket, the mounting seat is connected with the swing bracket through a first elastic arm and a second elastic arm and is formed with a through hole for a wiring harness to pass through, and the wiring harness connects the key board and the circuit board.

Furthermore, in the above technical solution, the outer wall of the toothbrush handle is provided with a detachable and replaceable panel, and an opening for the key to extend out is formed on the panel.

Furthermore, in the above technical solution, the toothbrush head includes a toothbrush head body, bristles mounted at one end of the toothbrush head body, a fastening member mounted at the other end of the toothbrush head body and connected to the driving device, and a silicone sleeve sleeved on the toothbrush head body, the fastening member is tapered, a ring groove fastened to an inner wall of the toothbrush head body is formed at a bottom of the fastening member, a fastening hole for the driving shaft of the driving device to penetrate through is formed in the fastening member, and an elastic fastening arm for fastening and fixing the driving shaft is formed at one side of the fastening hole; the silica gel is sheathe in the shaping has the plural number arch, and this arch is located brush hair back one side, the brush hair passes the silica gel cover.

After adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the driving device is arranged in the toothbrush handle in a swinging manner, the first sensing device is arranged on the side surface of the swinging tail end of the driving device, the swinging support corresponding to the first sensing device is arranged at the swinging tail end of the driving device, the first sensing device drives the swinging support to swing according to the stress of the toothbrush head to trigger the driving device to work, the first resetting device is arranged between the swinging support and the circuit board to push the swinging support to reset so as to realize that the toothbrush head is started under the extrusion force, and immediately stops when being loosened, so that the toothbrush head can be controlled to work at any time, and further, the entrance can be opened immediately and the exit can be stopped immediately.

Description of the drawings:

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a rear view of the present invention in use;

FIG. 3 is a cross-sectional view of section A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is an exploded view of a toothbrush handle of the present invention;

FIG. 6 is a second exploded view of the toothbrush handle of the present invention;

FIG. 7 is a perspective view of a brush head body of the present invention;

FIG. 8 is a perspective view of a fastener of the present invention;

fig. 9 is a perspective view of a silicone cover in the present utility model;

FIG. 10 is a control schematic of the present invention;

fig. 11 is a circuit diagram of the present invention.

Description of reference numerals:

1 toothbrush handle 12 panel 13 light hole

131 light-transmitting sealing waterproof part 2 toothbrush head 21 brush head body

210 cavity 211 and convex ring 212 first positioning groove

213 second positioning groove 214 first positioning projection 215 second positioning projection

216 third positioning projection 217 second projection 22 bristle

23 snap 231 ring groove 232 snap hole

233 elastic latch arm 234 first projection 235 first rib

236 second rib 237 and third rib 238 retaining projection

Positioning hole of first protrusion 242 of 24 silica gel sleeve 241

3 support 4 drive arrangement 41 convex type bottom

42 drive shaft 43EVA gasket 44 casing

5 first mounting hole of circuit board 50 battery 501

502 second mounting hole 51 first sensing means 52 second sensing means

53 third induction device 54 fourth induction device 55 keypad

56 harness 58 indicating lamp 581EVA shading part

6 first positioning convex part 62 and second positioning convex part of swing bracket 61

63 mounting 64 first spring arm 65 second spring arm

66 through hole 71 first resetting means 711 first U-shaped latch

72 second reset device 721 second U-shape fastening part 73 first elastic conducting piece

74 second elastic conducting sheet

The specific implementation mode is as follows:

the utility model is further illustrated below with reference to specific embodiments and the accompanying drawings.

Referring to fig. 1 to 11, there is shown an electric toothbrush which is controlled and adjusted by force applied to a toothbrush head, comprising: toothbrush handle 1 and toothbrush head 2, be provided with support frame 3 in toothbrush handle 1, with but the mode of swing install in support frame 3 and be used for the drive arrangement 4 of toothbrush head 2 vibration, install in be used for control on the support frame 3 circuit board 5 of drive arrangement 4 and be used for providing battery 50 of electric energy, drive arrangement 4's swing end is provided with swing support 6, be provided with on the circuit board 5 with swing support 6 one side clearance spaced first induction system 51, circuit board 5 with be provided with first resetting means 71 between this side of swing support 6. Install in toothbrush handle 1 through with drive arrangement 4 with wobbling mode, and set up first induction system 51 in drive arrangement 4 swing terminal side, swing support 6 that sets up and first induction system 51 corresponds at drive arrangement 4's swing end simultaneously, order about swing support 6 swing to trigger drive arrangement 4 work according to toothbrush head 2 atress by first induction system 51, and it promotes swing support 6 and reset to set up first resetting means 71 between swing support 6 and circuit board 5, in order to realize that toothbrush head 2 receives the extrusion force to start, loosen and then stop immediately, ensure to control toothbrush head 2 work at any time, and then realize that the entry opens promptly, stop promptly from the mouth. Secondly, the circuit board 5 can control the total time of single work of the driving device 4 so as to ensure that the tooth brushing time is not less than two minutes.

A third induction device 53 and a fourth induction device 54 which are separated by a gap are arranged on the other side of the swing bracket 6, the third induction device 53 and the fourth induction device 54 are linearly connected with the circuit board 5 through a key board 55, the third induction device 53 and the fourth induction device 54 are distributed in parallel along the long edge of the toothbrush handle 1, and a second reset device 72 is arranged between the key board 55 and the swing bracket 6. In an embodiment, the third sensing device 53 and the fourth sensing device 54 are arranged on one symmetrical side of the first sensing device 51, and the third sensing device 53 and the fourth sensing device 54 are used for switching the working mode of the electric toothbrush when the toothbrush head 2 is reversely stressed with extrusion force, so as to realize the button-free operation switching mode, wherein the default modes of the electric toothbrush comprise a deciduous tooth mode, a tooth changing mode and a permanent tooth mode.

The circuit board 5 is further provided with a second sensing device 52 which is separated from the swing bracket 6 by a gap, and the second sensing device 52 and the first sensing device 51 are longitudinally distributed in parallel along the long side of the toothbrush handle 1; a first elastic conducting sheet 73 and a second elastic conducting sheet 74 are symmetrically arranged on two sides of the swing bracket 6, wherein the first elastic conducting sheet 73 corresponds to the first sensing device 51 and the second sensing device 52 and is separated from each other by a gap, and the second elastic conducting sheet 74 corresponds to the third sensing device 53 and the fourth sensing device 54 and is separated from each other by a gap. The second sensor means 52 and the first sensor means 51 may also be laterally juxtaposed along the short side of the toothbrush handle 1.

The first reset device 71 and the second reset device 72 are both tower-shaped springs, a first positioning protrusion 61 and a second positioning protrusion 62 for positioning the first reset device 71 and the second reset device 72 are symmetrically formed on the swing bracket 6, a first mounting hole 501 and a second mounting hole 502 for mounting the first reset device 71 and the second reset device 72 are respectively formed on the circuit board 5 and the key board 55, and a first U-shaped fastening part 711 and a second U-shaped fastening part 721 for inserting into the first mounting hole 501 and the second mounting hole 502 are respectively formed at the bottom ends of the first reset device 71 and the second reset device 72 in a bending manner.

The lower end of the driving device 4 is provided with a convex bottom cover 41 for installing the swing bracket 6, the swing bracket 6 is sleeved on the convex bottom cover 41, the lower end of the swing bracket 6 is provided with an installation seat 63 for installing and positioning the support frame 3, the installation seat 63 and the swing bracket 6 are connected through a first elastic arm 64 and a second elastic arm 65 and are provided with a through hole 66 for a wiring harness 56 to pass through, and the wiring harness 56 connects the key-press plate 55 and the circuit board 5. The shaping of mount pad 63 lower extreme has the card to be gone into location convex part in the support frame 3, first elastic arm 64 with the one end of second elastic arm 65 respectively with the mount pad 63 both sides are fixed, first elastic arm 64 with the second elastic arm 65 other end is fixed in swing bracket 6 upper end and is the diagonal distribution setting.

The outer wall of the toothbrush handle 1 is provided with a detachable and replaceable panel 12, and an opening for the key 11 to extend out is formed on the panel 12.

The toothbrush head 2 comprises a toothbrush head body 21, bristles 22 arranged at one end of the toothbrush head body 21, a buckling piece 23 arranged at the other end of the toothbrush head body 21 and connected with the driving device 4, and a silica gel sleeve 24 sleeved on the toothbrush head body 21, wherein the buckling piece 23 is conical, a ring groove 231 clamped with the inner wall of the toothbrush head body 21 is formed at the bottom of the buckling piece 23, a clamping hole 232 for a driving shaft 42 of the driving device 4 to penetrate through is formed in the buckling piece 23, and an elastic clamping arm 233 for clamping and fixing the driving shaft 42 is formed at one side of the clamping hole 232; a plurality of first protrusions 241 are formed on the silicone sleeve 24, the first protrusions 241 are located on one side of the back of the brush bristles 22, and the brush bristles 22 penetrate through the silicone sleeve 24. The first protrusions 241 are longitudinally distributed along the brush head body 21 and have gully shapes, and are not equal in height.

A flared cavity 210 is formed at the lower end of the brush head body 21, a convex ring 211 matched with the ring groove 231 is formed at the lower end of the cavity 210, a first positioning groove 212 and a second positioning groove 213 for positioning the buckling piece 23, a first positioning lug 214 and a second positioning lug 215 are further formed on the inner wall of the cavity 210, a third positioning lug 216 for positioning the silicone sleeve 24 is further formed on the outer wall of the brush head body 21, the third positioning lug 216 is positioned in the middle of the first protrusion 241 and is lower than the first protrusion 241 in height, and a positioning hole 242 matched with the third positioning lug 216 and clamped is formed in the middle of the first protrusion 241; a first protrusion 234 matched and positioned with the first positioning groove 212 is formed at the upper end of the buckling piece 23, a first rib 235 matched and positioned with the second positioning groove 213 is formed on the side wall of the buckling piece 23, the first rib 235 is positioned at one symmetrical side of the elastic buckling arm 233, a second rib 236 and a third rib 237 which are parallel to the first rib 235 and are positioned in contact with the first positioning protrusion 214 and the second positioning protrusion 215 are further formed on the side wall of the buckling piece 23, clamping convex parts 238 pressed and clamped with the cavity 210 are formed on the first rib 235, the second rib 236 and the third rib 237, and a second protrusion 217 matched and clamped with the clamping convex parts 238 is formed at the lower end of the second positioning groove 213.

An indicator light 58 is arranged below the control switch 57, a light-transmitting hole 13 corresponding to the indicator light 58 is formed in the toothbrush handle 1, a light-transmitting sealing waterproof piece 131 is installed on the light-transmitting hole 13, and an EVA shading piece 581 is sleeved on the indicator light 58.

Referring to fig. 10, the circuit board 5 includes a main control circuit module 81, a charging circuit module 82, a protection circuit module 83, an indicator light circuit module 84, a driving circuit module 85, and a switch circuit module 86.

The driving device 4 is covered with a shell 44, one end of the shell 44 is hinged with the support frame 3, and an EVA gasket 43 is arranged between one side of the shell 44 and the inner wall of the toothbrush handle 1; the circuit board 5 is mounted on one side of the support frame 3, the driving device 4 is mounted on the upper portion of the support frame 3, the battery 50 is mounted on the lower portion of the support frame 3, and the key board 55 is mounted on the other side of the support frame 3 and located between the driving device 4 and the battery 50. The driving device 4 is a motor.

Referring to fig. 10, in the first embodiment, the first sensing device 51, the second sensing device 52, the third sensing device 53 and the fourth sensing device 54 are pressure sensing probes, pressure sensing resistors or touch buttons. A fifth sensing device is arranged below the second sensing device 52 in parallel, and the fifth sensing device is arranged in a collinear way with the first sensing device 51 and the second sensing device 52. The working principle of the embodiment is as follows; when the toothbrush head 2 is subjected to extrusion force, the toothbrush head 2 slightly swings to one side and prizes the driving device 4 to swing in the opposite direction, when the toothbrush head 2 is subjected to extrusion force on one side of the bristles 22, the driving device 4 drives the swing bracket 6 to approach the first sensing device 51, a starting signal is generated after the first sensing device 51 is contacted with the first elastic conducting sheet 73, and the circuit board 5 controls the electric tooth to start; when the extrusion force applied to the toothbrush head 2 is greater than the first preset value, the second sensing device 51 contacts with the first elastic conducting sheet 73, and the driving device 4 is triggered to increase the vibration intensity; when the extrusion force applied to the toothbrush head 2 is greater than the second preset value, the fifth sensing device is in contact with the first elastic conducting sheet 73 to trigger the driving device 4 to stop for a short time and reduce the vibration amplitude, and when the extrusion force applied to the toothbrush head 2 is reduced to be less than the first preset value, the driving device 4 returns to the first preset gear to work; finally, when the squeezing force applied to the toothbrush head 2 is reduced to zero, the first resetting device 71 resets the driving device 4, the first elastic conducting piece 74 is separated from the first sensing device 51, and the electric toothbrush is turned off or returns to a standby state. Therefore, when the squeezing force applied to the toothbrush head 2 is too large, the driving device 4 reduces the vibration intensity to protect the teeth. When the toothbrush head 2 is that the back of the bristles 22 is subjected to extrusion force, the driving device 4 drives the swing bracket 4 to approach the third sensing device 53, after the third sensing device 53 is contacted with the second elastic conducting sheet 74, a standby signal is generated, the electric toothbrush enters an awakening state, a gear shifting signal is output simultaneously, the circuit board 5 controls the electric toothbrush to switch the mode to work and is started at the current gear for a short time, and then different modes are switched.

In the second embodiment, the first sensing device 51, the second sensing device 52, the third sensing device 53 and the fourth sensing device 54 are conductive pins, the first elastic conducting piece 73 and the second elastic conducting piece 74 are both connected to an electrode of the driving device 4, and the swing bracket 6 is an insulating member. Two fourth induction devices 54 are arranged in parallel. The working principle of the embodiment is as follows: when toothbrush head 2 senses the positive extrusion force, first elasticity conduction piece 73 switches on with the contact of first induction system 51, generates the start signal, and circuit board 5 control electric toothbrush start, and when the positive extrusion force was greater than first default, first elasticity conduction piece 73 switched on with the contact of second induction system 52, generates strong vibration mode signal, and vibration dynamics or range are strengthened to 5 accuse electric teeth of circuit board. When the toothbrush head 2 senses that the front extrusion force is zero, the first reset device 71 resets the driving device 4, the first elastic piece 73 is separated from the first sensing device 51, a standby or shutdown signal is generated, and the circuit board 5 controls the toothbrush to be standby or shut down. When the toothbrush head 2 is extruded to the reverse side, the second elastic conducting sheet 74 is in contact conduction with the third sensing device 53 to generate a standby signal, the electric toothbrush enters an awakening state and simultaneously outputs a gear shifting signal, and the circuit board 5 controls the electric toothbrush to switch the working mode and start at the current position for a short time. The control method can realize the functions of automatic awakening and automatic starting of the electric toothbrush without keys, opening of the mouth and stopping of the electric toothbrush when the electric toothbrush leaves the mouth, and intelligent dynamic adjustment of the tooth brushing vibration intensity.

A control method of an electric toothbrush comprises the following steps:

firstly, the toothbrush head 2 senses extrusion force;

secondly, when one side of the brush hair 22 of the toothbrush head 2 is extruded, the driving device 4 swings around the hinged part, so that the swinging bracket 6 is contacted with the first sensing device 51 to generate a starting signal, and the circuit board 5 controls the electric toothbrush to start and start at a first preset gear and start to work;

thirdly, when the extrusion force on one side of the brush head 22 of the toothbrush head 2 is increased to a first preset value, a strong vibration mode signal is generated, and the circuit board 5 controls the driving device 4 to strengthen the vibration strength and amplitude;

fourthly, when the extrusion force applied to the toothbrush head 2 is increased to be larger than a second preset value, a protection signal is generated, the circuit board 5 controls the driving device 4 to stop for a short time, and then the vibration intensity and amplitude are reduced;

fifthly, when the extrusion force applied to the toothbrush head 2 is reduced to be less than a first preset value, the circuit board 5 controls the driving device 4 to return to a first preset gear;

sixthly, when the extrusion force applied to the toothbrush head 2 is reduced to zero, the first reset device 71 resets the driving device 4, the first elastic and through piece 73 is separated from the first sensing device 51, and the circuit board 5 controls the toothbrush to be standby or shut down;

seventhly, when the back of the bristles 22 of the toothbrush head 2 is subjected to extrusion force, the driving device 4 swings around the hinged part, so that the swinging support 6 is in contact with the third sensing device 53 to generate a standby signal, the electric toothbrush enters an awakening state, meanwhile, a gear shifting signal is output, and the circuit board 5 controls the electric toothbrush to switch the tooth brushing mode and start at the current gear briefly.

It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims (9)

1. An electric toothbrush controlled and adjusted by force of a toothbrush head, comprising: toothbrush handle (1) and toothbrush head (2), its characterized in that, be provided with in toothbrush handle (1) support frame (3), install in with but the mode of rocking install in support frame (3) and be used for the drive toothbrush head (2) drive arrangement (4) of vibration, install in be used for control on support frame (3) circuit board (5) of drive arrangement (4) and be used for providing battery (50) of electric energy, the swing end of drive arrangement (4) is provided with swing support (6), be provided with on circuit board (5) with swing support (6) one side clearance separated first induction system (51), circuit board (5) with be provided with first resetting means (71) between this side of swing support (6).

2. The electric toothbrush controlled and adjusted by the force of the toothbrush head according to claim 1, characterized in that: swing support (6) opposite side is provided with third induction system (53) and fourth induction system (54) that the clearance separates, third induction system (53) with fourth induction system (54) pass through keypad (55) with circuit board (5) linear connection, just third induction system (53) with fourth induction system (54) are followed toothbrush handle (1) long limit is distributed side by side, keypad (55) with be provided with second resetting means (72) between swing support (6).

3. The electric toothbrush controlled and adjusted by the force of the toothbrush head according to claim 2, characterized in that: the circuit board (5) is also provided with a second induction device (52) separated from the swing bracket (6) by a gap, and the second induction device (52) and the first induction device (51) are longitudinally distributed in parallel along the long edge of the toothbrush handle (1); the swing support (6) bilateral symmetry is provided with first elasticity conducting sheet (73) and second elasticity conducting sheet (74), wherein, first elasticity conducting sheet (73) correspond first induction system (51) with second induction system (52) and mutual clearance separates, second elasticity conducting sheet (74) correspond third induction system (53) with fourth induction system (54) and mutual clearance separates.

4. The electric toothbrush controlled and adjusted by the force of the toothbrush head according to claim 3, characterized in that: the first sensing device (51), the second sensing device (52), the third sensing device (53) and the fourth sensing device (54) are pressure sensing probes, pressure sensing resistors or touch keys.

5. The electric toothbrush controlled and adjusted by the force of the toothbrush head according to claim 3, characterized in that: the first induction device (51), the second induction device (52), the third induction device (53) and the fourth induction device (54) are conductive pins, the first elastic conducting sheet (73) and the second elastic conducting sheet (74) are connected with electrodes of the driving device (4), and the swing support (6) is an insulating piece.

6. The electric toothbrush controlled and adjusted by the force of the toothbrush head according to claim 3, characterized in that: the first reset device (71) and the second reset device (72) are both tower-shaped springs, a first positioning convex part (61) and a second positioning convex part (62) which are respectively used for positioning the first reset device (71) and the second reset device (72) are symmetrically formed on the swing support (6), a first mounting hole (501) and a second mounting hole (502) which are used for mounting the first reset device (71) and the second reset device (72) are respectively formed in the circuit board (5) and the key board (55), and a first U-shaped buckling part (711) and a second U-shaped buckling part (721) which are inserted into the first mounting hole (501) and the second mounting hole (502) are respectively formed in the bottom ends of the first reset device (71) and the second reset device (72) in a bending mode.

7. An electric toothbrush according to any one of claims 2 to 6, wherein the force control adjustment of the toothbrush head is performed by: the lower end of the driving device (4) is provided with a convex bottom cover (41) used for installing the swing support (6), the swing support (6) is sleeved on the convex bottom cover (41), the lower end of the swing support (6) is provided with a mounting seat (63) installed and positioned on the support frame (3), the mounting seat (63) is connected with the swing support (6) through a first elastic arm (64) and a second elastic arm (65) and is provided with a through hole (66) for a wiring harness (56) to pass through, and the wiring harness (56) is connected with the key board (55) and the circuit board (5).

8. The electric toothbrush controlled and adjusted by the force of the toothbrush head according to claim 7, characterized in that: the outer wall of the toothbrush handle (1) is provided with a detachable and replaceable panel (12), and an opening for the key (11) to extend out is formed in the panel (12).

9. The electric toothbrush controlled and adjusted by the force of the toothbrush head according to claim 8, wherein: the toothbrush head (2) comprises a toothbrush head body (21), bristles (22) arranged at one end of the toothbrush head body (21), a buckling piece (23) arranged at the other end of the toothbrush head body (21) and connected with the driving device (4), and a silica gel sleeve (24) sleeved on the toothbrush head body (21), wherein the buckling piece (23) is conical, a ring groove (231) clamped with the inner wall of the toothbrush head body (21) is formed at the bottom of the buckling piece (23), a clamping hole (232) for a driving shaft (42) of the driving device (4) to penetrate through is formed in the buckling piece (23), and an elastic clamping arm (233) for clamping and fixing the driving shaft (42) is formed at one side of the clamping hole (232); the silica gel sleeve (24) is formed with a plurality of protrusions (241), the protrusions (241) are located on one side of the back of the brush hair (22), and the brush hair (22) penetrates through the silica gel sleeve (24).

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