CN206198076U - Driving device for electric toothbrush - Google Patents

Abstract

The utility model provides a kind of driving device for electric toothbrush, including motor stator, stator fixed mount, motor vibrator and power transmission shaft；Stator fixed mount includes the female fixed mount and sub- fixed mount that are connected by screw, and motor stator is installed between female fixed mount and sub- fixed mount；Female fixed mount includes the first limiting plate, the first connecting plate and the second limiting plate that are connected, and sub- fixed mount includes the 3rd limiting plate, the second connecting plate and the 4th limiting plate that are connected；The bottom of motor vibrator is centered around on the copper coil that the left and right sides of the stator fixed mount is exposed, and power transmission shaft is connected with the top of motor vibrator.The stator fixed mount of this patent, can be attached with motor stator securely, motor stator is enclosed in inside the stator fixed mount of female fixed mount and sub- fixed mount composition, it is more convenient for being assembled between stator fixed mount outer wall and toothbrush body, stator fixed mount can effectively buffer the vibration force produced during motor operations, improve shock-absorbing function.

Description

Driving device for electric toothbrush

Technical field

The utility model is related to toothbrush drive technical field, more particularly, to a kind of driving device for electric toothbrush.

Background technology

The motor of existing electric toothbrush is, by the principle of nuclear magnetic resonance, to use the resonance machine of the motor with rotating armature Structure, it this have the advantage that design simply and reasonable price.

Its primary structure has electric circle (being connected with the electrified coil of alternating current) and the permanent magnet group being arranged on above electric circle Part (i.e. permanent magnet assembly is specifically made up of two permanent magnetic iron blocks around rotary shaft)；After electrified coil is connected with alternating current, its meeting Produce the magnetic field of change；After the magnetic direction of electrified coil produces N, S magnetic pole to be continually changing, the permanent magnet above electrified coil Component can receive the magnetic fields of vertical direction, and permanent magnet assembly can be produced at the vertical top position of electrified coil around rotary shaft Raw reciprocating rotation by a small margin, eventually through bolt arrangement in rotary shaft, by rotational action, (resting period i.e. suitable, counterclockwise turns It is dynamic) pass to the action that brush is realized brushing teeth；It is obvious that still there is such as lower section in the motor product in above-mentioned electric toothbrush The technological deficiency in face：The area very little of magnet piece, magnetic action does not cause finally the motor product of electric toothbrush to be short of power by force Problem.

Therefore, the present inventor devises one kind in the patent of Application No. 201510629443.1 applying in electric toothbrush In motor, the motor can be very good to solve the problems, such as being short of power for product；But in application process, invention human hair Existing, the motor is to be fixed using Nian Jie or encryption seal with the housing of electric toothbrush, that is to say, that the motor is direct with housing Contacted, produce vibrations excessive with housing in motor starting, and use rear motor easily to produce disengaging with housing for a long time, Influence is normally used.

Therefore, the defect for how overcoming connection and the vibrations of motor product and toothbrush body in above-mentioned electric toothbrush is ability Field technique personnel technical problem urgently to be resolved hurrily.

Utility model content

In order to solve the above-mentioned technical problem, the utility model provides a kind of driving device for electric toothbrush.

A kind of driving device for electric toothbrush disclosed in the utility model, including motor stator, stator fixed mount, motor vibrator And power transmission shaft；

The motor stator includes：Iron core, coil plastic processing frame, copper coil；The coil plastic processing frame is H-shaped structure, its Inside is provided with the draw-in groove for accommodating the iron core, also, the side of the iron core stretches out in the coil modeling of the H-shaped structure The outside of the side shield of bin two, the copper coil is looped around on the coil plastic processing frame；

The stator fixed mount includes the female fixed mount and sub- fixed mount that are connected by screw, and the motor stator is installed on Between female fixed mount and sub- fixed mount；

First limiting plate that is connected, first connecting plate and second limiting plate of the female fixed mount including the structure that takes the shape of the letter U, First limiting plate and the second limiting plate inner side are equipped with first of the side shield of coil plastic processing frame two for clamp H-shaped structure Groove, is respectively provided with receiving and stretches out in the side shield of coil plastic processing frame two on first limiting plate and the second limiting plate The U-lag of the iron core in outside；

Threeth limiting plate, second connecting plate and fourth limiting plate that are connected of the sub- fixed mount including the structure that takes the shape of the letter U, 3rd limiting plate and the 4th limiting plate inner side are equipped with second of the side shield of coil plastic processing frame two for clamp H-shaped structure Groove, the 3rd limiting plate and the 4th limiting plate are respectively provided with receiving and stretch out in outside the side shield of coil plastic processing frame two The U-lag of the iron core of side；

The bottom of the motor vibrator is centered around on the copper coil that the left and right sides of the stator fixed mount is exposed, described Power transmission shaft is connected with the top of motor vibrator.

Further, multiple stopper slots, first limiting plate and second are respectively equipped with two sides of the iron core Multiple projections for being installed on stopper slot are respectively equipped with U-lag on limiting plate.

Further, the upper and lower ends of one of baffle plate of the coil plastic processing frame of the H-shaped structure are respectively equipped with multiple 3rd groove, the first groove on the inside of first limiting plate is provided with multiple for being installed in the groove of baffle plate lower end the 3rd Interior limited block.

Further, it is respectively equipped with multiple being used for the iron core in the 3rd limiting plate and the 4th limiting plate U-lag The spacing limited block in two sides.

Further, it is provided with multiple for being installed in the coil plastic processing frame in the second groove on the 3rd limiting plate The groove of baffle plate upper end the 3rd in multiple limited blocks.

Further, first connecting plate is provided with for the passage by copper coil.

Further, also including battery installing rack, the battery installing rack is packed in the first connecting plate in female fixed mount Rear end.

Further, the motor vibrator include plastics locating rack, metal locating rack, metal resonance plate, metal turn can piece, Permanent magnetic iron block；The plastics locating rack is wrapped on the outer surface of cupular part of the metal locating rack, and the metal locating rack Bottom protrudes from the bottom of the plastics locating rack；The metal in the plastics locating rack and simultaneously positioned at top is fixed Cavity in the frame of position is the first cavity；Immediately below the plastics locating rack and simultaneously positioned at the metal locating rack of bottom Interior cavity is the second cavity；The metal resonance plate is provided with first cavity and metal turns energy piece, the metal turns Energy piece is fixedly connected around the metal resonance plate；The power transmission shaft is fixed on the metal and positions by the plastics locating rack The top of frame, and the bottom of the power transmission shaft stretches into and fixed with the metal resonance plate in the first cavity of the metal locating rack Connection；The permanent magnet assembly of two permanent magnetic iron block compositions is centered around the left and right sides of the copper coil, and permanent magnetic iron block is fixed It is connected to the bottom of the metal locating rack.

Further, the plastics locating rack is the closing plastic structural part with rectangular enclosure, the plastics locating rack Profile entirety rectangular shaped.

Further, the metal turn energy piece is located in the rectangular enclosure of the plastics locating rack and the metal turns energy Piece is fixedly connected around the metal resonance plate with the power transmission shaft.

Using above-mentioned technical proposal, the technique effect that the utility model is produced has：

Using the stator fixed mount being made up of female fixed mount and sub- fixed mount of this patent, not only can securely with motor Stator is attached, and motor stator can be enclosed in inside the stator fixed mount of female fixed mount and sub- fixed mount composition, It is more convenient for being assembled between stator fixed mount outer wall and toothbrush body, specifically limit can be set in toothbrush body corresponding inwall Position bar, carries out spacing to stator fixed mount, and motor stator is produced and rocked when preventing motor operations, in addition, female fixed mount and son are solid The stator fixed mount for determining frame composition can effectively buffer the vibration force produced during motor operations, improve shock-absorbing function.

Brief description of the drawings

In order to illustrate more clearly of the utility model specific embodiment or technical scheme of the prior art, below will be right The accompanying drawing to be used needed for specific embodiment or description of the prior art is briefly described, it should be apparent that, describe below In accompanying drawing be some implementation methods of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation of motor stator；

Fig. 3 is the side view of Fig. 2；

Fig. 4 is the assembling assumption diagram of motor stator and stator fixed mount；

Fig. 5 is the structural representation of female fixed mount；

Fig. 6 is the structural representation of sub- fixed mount；

Fig. 7 is the structural representation of motor vibrator.

Reference：

1- motor stators；2- stator fixed mounts；3- motor vibrators；4- power transmission shafts；5- battery installing racks；The TPE of 6- the are soft Glue-line；The TPE flexible glues of 7- the 2nd layer；11- iron cores；12- coil plastic processing frames；13- copper coils；121- baffle plates；21- mother's fixed mounts； 22- fixed mounts；31- plastics locating racks；32- metal locating racks；33- metal resonance plates；34- metals turn can piece；35- permanent magnets Block；111- stopper slots；The grooves of 122- the 3rd；The limiting plates of 211- first；The connecting plates of 212- first；The limiting plates of 213- second；214- First groove；215-U shape grooves；216- is raised；217- limited blocks；The limiting plates of 221- the 3rd；The connecting plates of 222- second；223- the 4th Limiting plate；The grooves of 224- second.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, this The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality Novel protected scope.

It is term " " center ", " on ", D score, "left", "right", " perpendicular, it is necessary to explanation in description of the present utility model Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outward " are, based on orientation shown in the drawings or position relationship, to be only Described with simplified for the ease of description the utility model, must had rather than the device or element for indicating or implying meaning specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.Additionally, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.

Refer to Fig. 1；

A kind of driving device for electric toothbrush disclosed in the utility model, including motor stator 1, stator fixed mount 2, motor are shaken Son 3 and power transmission shaft 4；

Refer to Fig. 2 and Fig. 3；The motor stator 1 includes：Iron core 11, coil plastic processing frame 12 and copper coil 13；

Coil plastic processing frame 12 is H-shaped structure, and the inside of coil plastic processing frame 12 is provided with the draw-in groove for accommodating the iron core 11, Iron core 11 is arranged in draw-in groove, also, the side of the iron core 11 stretches out in 12 liang of side shields of coil plastic processing frame of H-shaped structure 121 outside, copper coil 13 is looped around on coil plastic processing frame 12；

Refer to Fig. 4；Stator fixed mount 2 includes the female fixed mount 21 and sub- fixed mount 22 that are connected by screw, and motor is fixed Son 1 is installed between female fixed mount 21 and sub- fixed mount 22；Female fixed mount 21 and sub- fixed mount 22 are used as the outer of motor stator 1 , on the one hand with the housing of electric toothbrush can be isolated motor stator 1 by shell, on the other hand can also directly with electric toothbrush shell Body is attached, and reduces shaking force.

Refer to Fig. 5；First limiting plate 211 that is connected of the female fixed mount 21 of the present utility model including the structure that takes the shape of the letter U, First connecting plate 212 and the second limiting plate 213, the limiting plate 213 of first limiting plate 211 and second are set in parallel in the first company The same side of fishplate bar 212, the inner side of 211 and second limiting plate of the first limiting plate 213 is equipped with the line for clamp H-shaped structure First groove 214 of 12 liang of bottoms of side shield 121 of circle plastic processing frame, is respectively equipped with the first limiting plate 211 and the second limiting plate 213 U-lag 215 for accommodating the iron core 11 for stretching out in the outside of 12 liang of side shields of the coil plastic processing frame 121；

Refer to Fig. 6；Threeth limiting plate 221 that is connected of the sub- fixed mount 22 of the present utility model including the structure that takes the shape of the letter U, Second connecting plate 222 and the 4th limiting plate 223, the 3rd limiting plate 221 and the 4th limiting plate 223 are set in parallel in the second company The same side of fishplate bar 222, the 3rd limiting plate 221 and the inner side of the 4th limiting plate 223 are equipped with the line for clamp H-shaped structure Second groove 224 at the top of 12 liang of side shields of circle plastic processing frame 121, the 3rd limiting plate 221 and the 4th limiting plate 223 set respectively There is the U-lag 215 for accommodating the iron core 11 for stretching out in the outside of 12 liang of side shields of the coil plastic processing frame 121；

The bottom of motor vibrator of the present utility model 3 is centered around the copper cash that the left and right sides of the stator fixed mount 2 is exposed On coil 13, the power transmission shaft 4 is connected with the top of motor vibrator 3.

Referring once again to Fig. 2 and Fig. 3；As a preferred embodiment, multiple is respectively equipped with two sides of iron core 11 Stopper slot 111, is respectively equipped with multiple for clamp on the U-lag 215 on the limiting plate 213 of first limiting plate 211 and second On stopper slot 111 raised 216, in the present embodiment, the quantity of the stopper slot 111 on each side of iron core 11 is set to two It is individual, likewise, on U-lag 215 on the first limiting plate 211 and the second limiting plate 213 for being installed on stopper slot 111 Raised 216 be likewise provided as two.

As a preferred embodiment, up and down the two of one of baffle plate 121 of the coil plastic processing frame 12 of the H-shaped structure End is respectively equipped with multiple 3rd grooves 122, and the first groove 214 of the inner side of first limiting plate 211 is provided with multiple for blocking Loaded on the limited block 217 in the groove 122 of 121 lower end of the baffle plate the 3rd.In the present embodiment, between multiple 3rd grooves 122 are equidistant Every the upper and lower ends for being distributed in one of baffle plate 121, accordingly, on the first groove 214 of the inner side of the first limiting plate 211 Multiple limited blocks 217 are equally set using equi-spaced apart, multiple limited blocks 217 is installed on multiple 3rd grooves just In 122, to increase the fastness that coil plastic processing frame 12 is connected with stator fixed mount 2.

Refer to Fig. 6；As a preferred embodiment, the U-lag of the 3rd limiting plate 221 and the 4th limiting plate 223 The spacing limited block 217 in the upper surface of multiple two sides for the iron core 11 is respectively equipped with 215；The present embodiment In, the position of limited block 217 stagger the iron core 11 two sides on multiple stopper slots 111 so that limited block 217 can be with It is pressed together on two upper surfaces of side of iron core 11.

As a preferred embodiment, it is provided with multiple for clamp in the second groove 224 on the 3rd limiting plate 221 Multiple limited blocks 217 in the groove 122 of 121 upper end of baffle plate the 3rd of the coil plastic processing frame 12.In the present embodiment, due to many The individual equi-spaced apart of 3rd groove 122 is distributed in the upper and lower ends of one of baffle plate 121, accordingly, in the 3rd limiting plate 221 Multiple limited blocks 217 on second groove 224 of side are equally set using equi-spaced apart, make multiple limited blocks 217 just can be with It is installed in multiple 3rd grooves 122, to increase the fastness that coil plastic processing frame 12 is connected with stator fixed mount 2.

Refer to Fig. 5；Used as a preferred embodiment, first connecting plate 212 is provided with for by copper coil 13 passage.

Used as a preferred embodiment, the present embodiment also includes battery installing rack 5, and the battery installing rack 5 is packed in mother The rear end of the first connecting plate 212 in fixed mount 21.

Using above-mentioned female fixed mount 21 and sub- fixed mount 22, can be not only attached with motor stator 1 securely, and And motor stator 1 can be enclosed in inside the stator fixed mount 2 that female fixed mount 21 and sub- fixed mount 22 are constituted, stator fixed mount It is more convenient for being assembled between 2 outer walls and toothbrush body, specifically positive stop strip can be set in toothbrush body corresponding inwall, to fixed Sub- fixed mount 2 carries out spacing, and motor stator 1 is produced and rocked when preventing motor operations, in addition, female fixed mount 21 and sub- fixed mount 22 The stator fixed mount 2 of composition can effectively buffer the vibration force produced during motor operations, improve shock-absorbing function.

In this patent, the structure of motor vibrator 3 should with the one kind disclosed in the patent of Application No. 201510629443.1 Motor configuration in electric toothbrush is similar to；Specifically：

Refer to Fig. 7；Motor vibrator 3 includes that plastics locating rack 31, metal locating rack 32, metal resonance plate 33, metal turn Can piece 34, permanent magnetic iron block 35；The plastics locating rack 31 is wrapped on the outer surface of cupular part of the metal locating rack 32, and described The bottom of metal locating rack 32 protrudes from the bottom of the plastics locating rack 31；In the plastics locating rack 31 and simultaneously position In the cavity in the metal locating rack 32 at top be the first cavity；Immediately below the plastics locating rack 31 and simultaneously position In the cavity in the metal locating rack 32 of bottom be the second cavity；The metal resonance plate is provided with first cavity 33 and metal turn can piece 34, the metal turn can piece 34 be fixedly connected around the metal resonance plate 33；The power transmission shaft 4 passes through The plastics locating rack 31 is fixed on the top of the metal locating rack 32, and the metal is stretched into the bottom of the power transmission shaft 4 It is fixedly connected with the metal resonance plate 33 in first cavity of locating rack 32；The permanent magnet assembly that two permanent magnetic iron blocks 35 are constituted The left and right sides of the copper coil 13 is centered around, and permanent magnetic iron block 35 is fixedly connected on the bottom of the metal locating rack 32.

Used as a preferred embodiment, the plastics locating rack 31 is the closing plastic structural part with rectangular enclosure, institute State the profile entirety rectangular shaped of plastics locating rack 31.

Used as a preferred embodiment, the metal turns energy piece 34 and is located in the rectangular enclosure of the plastics locating rack 31 And the metal turns energy piece 34 and is fixedly connected with the power transmission shaft 4 around the metal resonance plate 33.

Used as a preferred embodiment, the side of the plastics locating rack 31 is additionally provided with TPE flexible glues layer 6, described First TPE flexible glues layer 6 is fixedly connected between the top inner wall of the plastics locating rack 31 and the whole casing body；The gold The side and front, the back side for belonging to locating rack 32 are provided with the 2nd TPE flexible glues layer 7；The company of fixation of 2nd TPE flexible glues layer 7 It is connected between the bottom inner wall of the metal locating rack 32 and the whole casing body.

It should be noted that the structure design and function of damping noise abatement can also be increased in this patent；Motor is transported in high speed During row, because the strength of electromagnetic conversion is than larger, while cause internal drive feature, drive mechanism vibration all than larger, therefore Plastics locating rack 31 and metal locating rack 32 may cannot realize firm fixation in whole casing body；While plastics locating rack If 31 and metal locating rack 32 will necessarily cause larger vibration due to having to rock it and strike whole machine inner walls, lead Cause to feel to compare vibration during Client handheld handle, while it strikes whole casing body also can produce damage to housing；So whole Individual structure design when, for Consumer's Experience, in addition it is also necessary in view of reduce vibrations and noise problem.

In concrete case, noise is mainly derived from whole transfer structure and is collided with machine shell in motion, Yi Jiyong The noise occurred during magnet assembly high-speed rotation.Solution is mainly (will plastics locating rack 31 using quadric injection mould technology With the integrated injection molding of metal locating rack 32；Again by the layer injection moulding of TPE flexible glues upper), in locating rack (i.e. plastics locating rack 31 And metal locating rack 32 etc.) key position increase the TPE flexible glues of 3mm thickness, as vibration absorbing usage.It will be apparent that above-mentioned TPE Flexible glue layer serves shock absorbing effect well.The impulsive force of locating rack and whole casing body collision rift is reduced in TPE flexible glues layer Meanwhile, it also reduces the frictional impact equivalent damage of whole casing body, product service life is increased indirectly, and ensure that product Structural stability and reliability.

It should be noted that the good hand touch elasticity of TPE is good, artificial rubber is commonly called as, its intensity and weatherability are compared with latex All more protruded Deng other performances.

, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly Connection；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Can be two connections of element internal.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

Finally it should be noted that：Various embodiments above is only used to illustrate the technical solution of the utility model, rather than it is limited System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole Technical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly The scope of each embodiment technical scheme of type.

Claims (10)

1. a kind of driving device for electric toothbrush, it is characterised in that：Including motor stator, stator fixed mount, motor vibrator and transmission Axle；

The motor stator includes：Iron core, coil plastic processing frame, copper coil；The coil plastic processing frame is H-shaped structure, inside it It is provided with the draw-in groove for accommodating the iron core, also, the side of the iron core stretches out in the coil plastic processing frame of the H-shaped structure The outside of two side shields, the copper coil is looped around on the coil plastic processing frame；

The stator fixed mount includes the female fixed mount and sub- fixed mount that are connected by screw, and the motor stator is installed on female solid Determine between frame and sub- fixed mount；

First limiting plate that is connected, first connecting plate and second limiting plate of the female fixed mount including the structure that takes the shape of the letter U, it is described It is first recessed that first limiting plate and the second limiting plate inner side are equipped with the side shield of coil plastic processing frame two for clamp H-shaped structure Groove, is respectively provided with receiving and stretches out in outside the side shield of coil plastic processing frame two on first limiting plate and the second limiting plate The U-lag of the iron core of side；

Threeth limiting plate, second connecting plate and fourth limiting plate that are connected of the sub- fixed mount including the structure that takes the shape of the letter U, it is described It is second recessed that 3rd limiting plate and the 4th limiting plate inner side are equipped with the side shield of coil plastic processing frame two for clamp H-shaped structure Groove, the 3rd limiting plate and the 4th limiting plate are respectively provided with receiving and stretch out in the side shield of coil plastic processing frame two outside Iron core U-lag；

The bottom of the motor vibrator is centered around on the copper coil that the left and right sides of the stator fixed mount is exposed, the transmission Axle is connected with the top of motor vibrator.

2. driving device for electric toothbrush according to claim 1, it is characterised in that：On two sides of the iron core respectively Multiple stopper slots are provided with, are respectively equipped with the U-lag on first limiting plate and the second limiting plate multiple for being installed on limit Projection on the groove of position.

3. driving device for electric toothbrush according to claim 2, it is characterised in that：The coil plastic processing frame of the H-shaped structure The upper and lower ends of one of baffle plate be respectively equipped with multiple 3rd grooves, set on the first groove on the inside of first limiting plate There are multiple limited blocks for being installed in the groove of baffle plate lower end the 3rd.

4. driving device for electric toothbrush according to claim 3, it is characterised in that：3rd limiting plate and the 4th spacing It is respectively equipped with plate U-lag multiple for the limited block spacing to two sides of the iron core.

5. driving device for electric toothbrush according to claim 4, it is characterised in that：On 3rd limiting plate second is recessed Multiple multiple limited blocks for being installed in the groove of baffle plate upper end the 3rd of the coil plastic processing frame are provided with groove.

6. driving device for electric toothbrush according to claim 5, it is characterised in that：First connecting plate be provided with for By the passage of copper coil.

7. driving device for electric toothbrush according to claim 6, it is characterised in that：Also include battery installing rack, the electricity Pond mounting bracket is packed in the rear end of the first connecting plate in female fixed mount.

8. driving device for electric toothbrush according to claim 7, it is characterised in that：The motor vibrator is positioned including plastics Frame, metal locating rack, metal resonance plate, metal turn can piece, permanent magnetic iron block；The plastics locating rack is wrapped in the metal positioning On the outer surface of cupular part of frame, and the bottom of the metal locating rack protrudes from the bottom of the plastics locating rack；Positioned at the modeling Material locating rack is interior and the cavity in the metal locating rack at top is the first cavity simultaneously；Positioned at the plastics locating rack Underface and the simultaneously cavity in the metal locating rack of bottom are the second cavity；Set in first cavity State metal resonance plate and metal turns energy piece, the metal turns energy piece and is fixedly connected around the metal resonance plate；The power transmission shaft It is fixed on the top of the metal locating rack by the plastics locating rack, and the bottom of the power transmission shaft is stretched into the metal and is determined It is fixedly connected with the metal resonance plate in first cavity of position frame；The permanent magnet assembly of two permanent magnetic iron block compositions is centered around institute The left and right sides of copper coil is stated, and permanent magnetic iron block is fixedly connected on the bottom of the metal locating rack.

9. driving device for electric toothbrush according to claim 8, it is characterised in that：The plastics locating rack is with rectangle The closing plastic structural part of cavity, the profile entirety rectangular shaped of the plastics locating rack.

10. driving device for electric toothbrush according to claim 9, it is characterised in that：The metal turns energy piece and is located in institute State in the rectangular enclosure of plastics locating rack and the metal turns energy piece and fixes company around the metal resonance plate and the power transmission shaft Connect.