CN217159462U - Motor of electric toothbrush and electric toothbrush - Google Patents

Abstract

The utility model discloses an electric toothbrush's motor and electric toothbrush, electric toothbrush's motor includes: a motor housing; the motor shaft is at least partially arranged in the motor shell; rotate drive assembly, rotate drive assembly and establish in the motor casing, rotate drive assembly and include: the stator is fixedly arranged relative to the motor shell, and the rotor is connected with a motor shaft; the translation drive assembly, translation drive assembly establishes in the motor casing, and translation drive assembly includes: the primary part is fixedly arranged relative to the motor shell, and the secondary part is connected with the rotor or the motor shaft; wherein, the projections of the rotary drive assembly and the translational drive assembly on the axis of the motor are at least partially overlapped. According to the utility model discloses a motor is provided with the rotation drive subassembly and the translation drive subassembly, can make the motor shaft rotate and the translation to changed the motor shaft and produced the direction of vibration, made the brush that corresponds clean tooth more effectively.

Description

Motor of electric toothbrush and electric toothbrush

Technical Field

The utility model belongs to the technical field of electric toothbrush and specifically relates to a motor and electric toothbrush of electric toothbrush.

Background

In the related art, the electric toothbrush generally adopts the sound wave motor, the rotor of the sound wave motor alternately runs in forward rotation and reverse rotation, and the forward rotation angle and the reverse rotation angle are usually not more than 5 degrees, in other words, the brush head deflects up and down during oral cleaning and does not move left and right.

On the other hand, some tartar is stubborn and can not be cleaned in the vertical direction, so that the tartar on the teeth of a user cannot be cleaned thoroughly.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a motor for an electric toothbrush, which is provided with a rotational driving assembly and a translational driving assembly, and can rotate and translate a motor shaft, thereby changing a direction in which the motor shaft vibrates, and enabling a corresponding brush to more effectively clean teeth.

The utility model also provides an electric toothbrush with above-mentioned motor.

According to the utility model discloses an electric toothbrush's motor includes: a motor housing; a motor shaft at least partially disposed within the motor housing; rotate drive assembly, it establishes to rotate drive assembly in the motor casing, rotate drive assembly includes: the stator is fixedly arranged relative to the motor shell, the rotor is connected with the motor shaft, a magnetic field generated by the stator is coupled with a magnetic field generated by the rotor to form a rotating magnetic field, and the rotor drives the motor shaft to rotate when the rotating magnetic field changes; the translation driving assembly is arranged in the motor shell and comprises: the primary part is fixedly arranged relative to the motor shell, the secondary part is connected with the rotor or the motor shaft, a magnetic field generated by the primary part is coupled with a magnetic field generated by the secondary part to form a translational magnetic field, and the secondary part drives the motor shaft to translate along the axis of the motor when the translational magnetic field changes; wherein, the projections of the rotary drive assembly and the translational drive assembly on the axis of the motor are at least partially overlapped.

According to the utility model discloses an electric toothbrush's motor can make the drive shaft vibration on a plurality of directions to make the brush head that the drive shaft can drive the toothbrush clean in a plurality of directions, improved electric toothbrush's clean ability, reduced the operation that the user required removed electric toothbrush. Furthermore, the projections of the rotary driving component and the translational driving component in the axial direction of the motor shaft are at least partially overlapped, so that the space occupied by the rotary driving component and the translational driving component is smaller, the structure of the electric toothbrush motor is more compact, the diameter of the electric toothbrush can be smaller, the weight is lighter, and a user can more comfortably grasp the electric toothbrush.

According to the utility model discloses an embodiment, when the rotation drive subassembly circular telegram the outage of translation drive subassembly, when the circular telegram of translation drive subassembly the outage of rotation drive subassembly.

According to the utility model discloses an embodiment, the rotation drive subassembly is sound wave motor element, the stator with at least one can produce alternating magnetic field in the rotor, so that the motor shaft winds the positive and negative rotation in turn of axis of motor.

According to an embodiment of the present invention, the stator includes: the first driving magnet and the second driving magnet are arranged at intervals along the circumferential direction; the rotor includes: the rotor coil, rotor coil is the annular, rotor coil's annular center line is located first driving magnet with the second driving magnet is relative in the contained angle that the axis of motor formed.

According to an embodiment of the present invention, the rotor and the secondary part are disposed at intervals in the circumferential direction of the motor shaft, the stator and the primary part are disposed at intervals in the circumferential direction of the motor shaft, the rotor corresponds to the stator, and the secondary part corresponds to the primary part.

According to an embodiment of the present invention, the motor of the electric toothbrush further comprises: the movable yoke part is connected with the motor shaft, and the rotor and the secondary part are both installed on the movable yoke part.

According to an embodiment of the present invention, the movable yoke portion includes: the central column is connected with the motor shaft and extends along the axis of the motor; a first yoke portion connected on a side of the center post, the rotor being disposed on the first yoke portion; the second yoke portion is connected on the other side of the center post, the second yoke portion and the first yoke portion are located on different sides of the center post, and the secondary part is arranged on the second yoke portion.

According to an embodiment of the present invention, the rotor includes a rotor coil, the first yoke portion includes: the winding plate is connected with the central column and extends along the axis of the motor, and the rotor coil is wound on the winding plate; and the boot plate extends to two circumferential sides from one end of the winding plate far away from the central column.

According to an embodiment of the invention, the second yoke comprises a plurality of winding posts spaced apart in the axial direction, the secondary part comprises a plurality of secondary coils and is wound on the plurality of winding posts, respectively.

According to an embodiment of the present invention, the rotor includes a plurality of rotor coils, and is a plurality of the rotor coils are relative the axis of the motor is arranged along circumferential spacing, the stator includes a plurality of magnet pairs, a plurality of magnet pairs are provided with a plurality of rotor coils one-to-one, and each the magnet pair includes the first driving magnet and the second driving magnet that are distributed along circumferential spacing.

According to an embodiment of the invention, the secondary part is arranged circumferentially adjacent between the rotor coils, and the primary part is arranged circumferentially adjacent between the pair of magnets.

According to an embodiment of the present invention, the motor of the electric toothbrush further comprises: a fixed yoke having a cylindrical shape with both ends open, the fixed yoke housing the rotor, the primary part being connected to the fixed yoke; the stator includes a stator permanent magnet embedded on the fixed yoke.

According to the utility model discloses an embodiment, be equipped with the mounting hole on the fixed yoke portion, elementary part inlays the dress and is in the mounting hole.

According to the utility model discloses an embodiment, form the recess on the internal perisporium of fixed yoke portion, the stator permanent magnet inlays in the recess.

According to the utility model discloses an embodiment, be formed with spacing portion on the internal perisporium of fixed yoke portion, spacing portion is used for the restriction the rotation range of rotor.

According to the utility model discloses an embodiment, translation drive assembly is the linear electric motor subassembly, primary with at least one can produce alternating magnetic field in the secondary part, in order to drive the motor shaft is followed the axis reciprocating motion of motor.

According to the utility model discloses an embodiment, secondary part includes one row or multirow secondary coil, works as secondary part includes the multirow during secondary coil, the multirow secondary coil arranges along circumference interval, correspond every row on the motor casing secondary part equally divide and do not is equipped with primary part.

According to an embodiment of the present invention, the primary part is at least one row, and each row of the primary part is distributed on the motor casing at intervals along the axial direction.

According to an embodiment of the invention, the primary part comprises a translation drive magnet mounted on the motor housing.

According to an embodiment of the present invention, the motor of the electric toothbrush further comprises: the elastic piece is connected between the motor shell and the motor shaft so as to drive the motor shaft to reset in the axial direction and/or the circumferential direction.

According to the utility model discloses an embodiment, the motor shaft is followed the one end of motor casing is stretched out, the elastic component is connected the other end of motor shaft.

According to the utility model discloses an embodiment, the elastic component is conical spring, conical spring's diameter main aspects is connected the motor casing, conical spring's diameter tip is connected the motor shaft.

According to an embodiment of the present invention, the motor of the electric toothbrush further comprises: the outer ring of the bearing is slidably arranged on the motor shell along the axis of the motor, and the inner ring of the bearing is sleeved outside the motor shaft.

According to the utility model discloses an embodiment, the one end diameter of motor casing reduces and forms the sleeve pipe, the one end of motor shaft extends in the sleeve pipe, the bearing is located intraductal and the overcoat of sleeve pipe the motor shaft.

The electric toothbrush according to the present invention will be briefly described below.

According to the utility model discloses an electric toothbrush includes handle shell, motor and brush head, prescribes a limit to the installation cavity in the handle shell, and the one end of handle shell is equipped with the mating holes, and the motor is arbitrary one in the above-mentioned embodiment the motor, the motor is located the installation cavity, and the motor shaft stretches out from the mating holes, outside the brush head is located handle shell, the connection of brush head is on the motor shaft. Because according to the utility model discloses an electric toothbrush is provided with the motor of above-mentioned embodiment, consequently two kinds of vibration modes of axial vibration and horizontal vibration can be realized to this electric toothbrush's brush head, has improved electric toothbrush's clean ability, rotates drive assembly and moves at least partial coincidence of drive assembly at the axial ascending projection of motor shaft with the translation, and the volume of motor is little, makes electric toothbrush's structure compacter, and weight is lighter, and the user is more comfortable to electric toothbrush's gripping.

According to an embodiment of the present invention, the distance between the brush head and the handle housing is larger than the axial movement range of the movable body.

According to an embodiment of the invention, the minimum distance between the brush head and the handle housing exceeds 0.5 mm.

According to an embodiment of the present invention, the motor shaft and the handle housing are provided with a buffer member therebetween.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a motor of an electric toothbrush according to an embodiment of the present invention;

fig. 2 is a schematic view of the fit of a yoke portion and a motor shaft according to an embodiment of the present invention;

fig. 3 is a front view of a motor shaft according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a motor shaft according to an embodiment of the present invention in the X-direction;

fig. 5 is a cross-sectional view of a motor shaft according to an embodiment of the present invention in the Y-direction;

fig. 6 is a cross-sectional view of a motor shaft according to an embodiment of the present invention in the Z-direction;

figure 7 is a schematic view of a toothbrush head according to an embodiment of the invention.

Reference numerals:

motor 1

A motor housing 11, a motor shaft 12,

rotary drive assembly 13, stator 131, first drive magnet 1311, second drive magnet 1312, rotor 132, rotor coil 1321

The translational drive assembly 14, the primary member 141, the secondary member 142,

a movable yoke 15, a center post 151, a first yoke 152, a winding plate 1521, a shoe plate 1522, a second yoke 153,

the fixed yoke 16, the mounting hole 161, the groove 162,

the elastic member (17) is provided with,

bearing 18, inner circle 181, outer circle 182, sleeve 183, brush head 19, bumper 191.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

An electric motor 1 of an electric toothbrush according to an embodiment of the present invention will be described with reference to fig. 1 to 7.

As shown in fig. 1, the motor 1 of the electric toothbrush according to the present invention includes a motor housing 11 and a motor shaft 12, at least a portion of the motor shaft 12 is disposed in the motor housing 11, the motor shaft 12 is used for transmitting a driving force, a brush head 19 of the toothbrush can be connected to the motor shaft 12, the motor shaft 12 generates vibration in a moving process, and transmits the vibration to the brush head 19 of the toothbrush, so as to clean teeth of a user.

The motor 1 further comprises a rotation driving assembly 13, the rotation driving assembly 13 is arranged in the motor shell 11, the rotation driving assembly 13 comprises a stator 131 and a rotor 132, the rotor 132 is connected with the motor shaft 12, a magnetic field generated by the stator 131 and the rotor 132 is coupled to form a rotation magnetic field, and the rotor 132 drives the motor shaft 12 to rotate around the axis of the motor 1 when the rotation magnetic field changes, so that the toothbrush head 19 vibrates around the motor shaft 12.

The motor 1 further includes a translational drive assembly 14, the translational drive assembly 14 is disposed in the motor housing 11, the translational drive assembly 14 includes a primary part 141 and a secondary part 142, the primary part 141 is fixedly disposed relative to the motor housing 11, the secondary part 142 is connected to the rotor 132 or the motor shaft 12, a magnetic field generated by the primary part 141 and a magnetic field generated by the secondary part 142 are coupled to form a translational magnetic field, and the secondary part 142 drives the motor shaft 12 to translate along an axis of the motor shaft 12 when the translational magnetic field changes, so that the motor shaft 12 can reciprocate in an axial direction of the motor shaft 12, and the brush head 19 of the toothbrush is driven by the motor shaft 12 to vibrate in the axial direction of the motor shaft 12.

In the related art, the electric toothbrush generally adopts the sound wave motor, the rotor of the sound wave motor alternately runs in forward rotation and reverse rotation, and the forward rotation angle and the reverse rotation angle are usually not more than 5 degrees, in other words, the brush head deflects up and down during oral cleaning and does not move left and right.

On the other hand, some tartar is stubborn and can not be cleaned in the vertical direction, so that the tartar on the teeth of a user cannot be cleaned thoroughly.

According to the utility model discloses an electric toothbrush's motor 1, through setting up rotation drive assembly 13, utilizes the rotating magnetic field that stator 131 and rotor 132 formed, through the direction that changes rotating magnetic field to make rotor 132 relative stator 131 around motor shaft 12 reciprocating rotation, from making the brush head 19 production of toothbrush around motor shaft upwards vibration to one side. The motor 1 further has a translational drive assembly 14, wherein a translational magnetic field formed by the primary part 141 and the secondary part 142 is used in the translational drive assembly to make the motor shaft 12 translate along the axial direction of the motor 1 by changing the direction of the translational magnetic field, wherein the translational motion can be reciprocating in the axial direction. According to the utility model discloses an electric toothbrush's motor 1 can make the drive shaft vibration in a plurality of directions to make the drive shaft can drive the brush head 19 of toothbrush clean in a plurality of directions, improved electric toothbrush's clean ability, reduced the required operation that removes electric toothbrush of user.

Further, the projections of the rotary driving component 13 and the translational driving component 14 in the axial direction of the motor shaft 12 are at least partially overlapped, so that the space occupied by the rotary driving component 13 and the translational driving component 14 is smaller, the structure of the electric toothbrush motor 1 is more compact, the diameter of the electric toothbrush can be smaller, the weight is lighter, and the user can grasp the electric toothbrush more comfortably.

According to an embodiment of the present invention, the motor shaft 12 can be completely disposed in the motor housing 11, the toothbrush head 19 is provided with a connecting shaft, at least a portion of the connecting shaft extends into the motor housing 11 to be fixedly connected with the motor shaft 12; in other embodiments, a portion of the motor shaft 12 may extend outside of the housing and the brush head 19 of the toothbrush may be fixed with the motor shaft 12.

According to an embodiment of the present invention, when the rotation driving assembly 13 is powered on, the translation driving assembly 14 is powered off, when the translation driving assembly 14 is powered on, the rotation driving assembly 13 is powered off, after the motor 1 of the electric toothbrush is started, one of the translation driving assembly 14 and the rotation driving assembly 13 works, that is, the electric toothbrush can only vibrate in one direction during working, after the motor 1 of the electric toothbrush is started, when the direction of the rotating magnetic field changes in a reciprocating manner, the direction of the translation magnetic field does not change, at this time, the motor shaft 12 only rotates in a reciprocating manner around the motor shaft 12 under the driving of the stator 131 and the rotation, so as to generate circumferential vibration around the direction of the motor shaft 12; when the direction of the translational magnetic field changes in a reciprocating manner after the motor 1 of the electric toothbrush is started, the direction of the rotary magnetic field does not change, and the motor shaft 12 only reciprocates along the axis of the motor 1 under the driving of the primary part 141 and the secondary part 142.

Through setting up the rotation drive assembly 13 and the translation drive assembly 14 of the motor 1 of electric toothbrush not work simultaneously, can reduce the mutual interference between rotation magnetic field and the translation magnetic field, can further improve the stability and the reliability of motor shaft 12 motion in the electric toothbrush simultaneously, can set up the switch on electric toothbrush in order to select different tooth brushing modes, switch over the mode of motion of rotation drive assembly 13 and translation drive assembly 14.

According to the utility model discloses an embodiment, rotation drive assembly 13 is the sound wave motor 1 subassembly, at least one in stator 131 and the rotor 132 can produce alternating magnetic field, so that motor shaft 12 is around the positive and negative alternate motion of the axis of motor 1, one in stator 131 and the rotor 132 can be constructed as the permanent magnet, another can twine there is the coil, can circulate alternating current in the coil in order to form alternating electric field, utilize alternating electric field in order to change the direction of rotating magnetic field, make the direction of rotating magnetic field change periodically, thereby make the relative motor shaft 12 pivoted ampere force of production between rotor 132 and the stator 131, in order to arouse motor shaft 12 at the ascending high-frequency vibration of axial, thereby make the toothbrush brush hair that sets up on the motor shaft 12 clean user's tooth high-efficiently.

As shown in fig. 1, according to an embodiment of the present invention, the stator 131 includes a first driving magnet 1311 and a second driving magnet 1312, the first driving magnet 1311 and the second driving magnet 1312 are disposed at intervals along the circumferential direction of the motor shaft 12 so that the ampere force distribution in the circumferential direction of the motor shaft 12 is uniform, when the first driving magnet 1311 and the second driving magnet 1312 are influenced by the magnetic field in the alternating magnetic field to move, the uniform force in the circumferential direction of the motor shaft 12 can be ensured, the generated vibration effect is better, the cleaning capability of the toothbrush is improved, and the user experience is optimized.

According to one embodiment of the present invention, the rotor 132 includes a rotor coil 1321, the rotor coil 1321 is configured in a ring shape, and a center line of the ring shape of the rotor coil 1321 is located within an angle formed by the first driving magnet 1311 and the second driving magnet 1312 with respect to an axis of the motor 1. An included angle is formed between the first driving magnet 1311 and the second driving magnet 1312 and the motor shaft 12, the magnetic field intensity of the magnetic field formed by the first driving magnet 1311 and the second driving magnet 1312 in the corresponding included angle is high, and the center line of the rotor coil 1321 is arranged in the included angle formed by the first driving magnet 1311 and the second driving magnet 1312 relative to the axis of the motor 1, so that the rotor coil 1321 can be directly returned to the original position when the power is off, and the automatic alignment function in the power-off state is achieved.

Further, according to an embodiment of the present invention, the rotor coil 1321 is configured to be plural and the center line of each rotor coil 1321 is arranged at intervals in the circumferential direction of the motor shaft 12, and likewise, the first driving magnet 1311 and the second driving magnet 1312 are configured to be corresponding to plural pairs each of the first driving magnet 1311 and the second driving magnet 1312 to be engaged with the corresponding rotor coil 1321, so that the vibration effect of the motor shaft 12 can be improved.

According to an embodiment of the present invention, the rotor 132 and the secondary part 142 are disposed at an interval in the circumferential direction of the motor shaft 12, so that the arrangement of the rotor 132 and the secondary part 142 on the motor shaft 12 is more reasonable, the rotor 132 and the secondary part 142 are both in the corresponding rotating magnetic field and the corresponding translational magnetic field, the arrangement of the motor shaft 12 is more compact, and the volume of the motor 1 is reduced. Further, the stator 131 and the primary part 141 are arranged at intervals in the circumferential direction of the motor shaft 12, the rotor 132 corresponds to the stator 131, the primary part 141 corresponds to the secondary part 142, and the stator 131 and the primary part 141 can be in corresponding rotating magnetic fields and translational magnetic fields, so that the arrangement of the motor 1 is more compact, the volume of the motor 1 of the electric toothbrush is reduced, meanwhile, as the rotor 132 corresponds to the stator 131 and the secondary part 142 corresponds to the primary part 141, the rotating magnetic fields and the translational magnetic fields can be positioned in the circumferential space of the motor shaft, the space in the motor is fully utilized, so that the rotating magnetic fields formed by the rotor 132 and the stator 131 and the translational magnetic fields formed by the primary part 141 and the secondary part 142 are overlapped in space, and the motor 1 of the electric toothbrush is more compact.

As shown in fig. 2, according to an embodiment of the present invention, the motor 1 of the electric toothbrush further includes a movable yoke portion 15, the movable yoke portion 15 is connected to the motor shaft 12, the rotor 132 and the secondary part 142 are both mounted on the movable yoke portion 15, the movable yoke portion 15 can be configured as a mounting base of the rotor 132 and the secondary part 142, the movable yoke portion 15 is rotated or translated by the driving of the rotor 132 and the secondary part 142, and the motor shaft 12 connected to the movable yoke portion 15 transmits the generated vibration to the brush head 19 of the electric toothbrush, so that the brush head 19 can be vibrated in a corresponding direction by the driving of the motor shaft 12, thereby cleaning the teeth of the user.

According to an embodiment of the present invention, the movable yoke part 15 comprises a central column 151, a first yoke part 152 and a second yoke part 153, the central column 151 connects the motor shaft 12, the central column 151 extends along the axis of the motor 1, the first yoke part 152 is connected on one side of the central column 151, the rotor 132 is arranged on the first yoke part 152, the second yoke part 153 is connected on the other side of the central column 151, the second yoke part 153 is located on the different side of the central column 151 from the first yoke part 152, and the sub-part 142 is arranged on the second yoke part 153. By providing the first yoke portion 152 and the second yoke portion 153 on the central column 151 so as to mount the rotor 132 and the secondary part 142, and providing the first yoke portion 152 and the second yoke portion 153 on different sides of the central column 151, the rotor 132 and the secondary part 142 can be arranged at a distance on the central axis, avoiding interference between the rotor 132 and the secondary part 142.

According to an embodiment of the present invention, the first yokes 152 are configured as two and symmetrically disposed on two sides of the central column 151 in a first direction, the second yokes 153 are also configured as two and symmetrically disposed on two sides of the central column 151 in a second direction, wherein the first direction and the second direction can be orthogonally disposed with respect to each other, for example, the first direction can be a Y direction of the central column 151, the second direction is an X direction of the central column 151, the first yokes 152 can be disposed between two adjacent second yokes 153, so as to make full use of a circumferential space of the central column 151, and the first yokes 152 and the second yokes 153 are compactly disposed on an outer periphery of the central shaft.

As shown in fig. 6, according to an embodiment of the present invention, the cross section of the central column 151 is configured to be circular, the first yoke portions 152 are disposed on both sides of the cross section of the central column 151 in the width direction, and the second yoke portions 153 are disposed on both sides of the cross section of the central column 151 in the length direction.

According to an embodiment of the present invention, the rotor 132 includes a rotor coil 1321, the first yoke 152 includes a bobbin 1521, the bobbin 1521 is connected to the central column 151 and extends along the axis of the motor shaft 12, the rotor coil 1321 is wound on the bobbin 1521, the bobbin 1521 extends in the axial direction of the motor shaft 12, when the rotor coil 1321 is wound on the bobbin 1521, a relatively uniform rotating magnetic field can be formed in the length direction of the central column 151, so that the ampere force generated by the rotating magnetic field applied to the central column 151 in the extending direction of the bobbin 1521 is more uniform, the rotating amplitude generated at each position of the central column 151 is uniform, the frequency and amplitude of the vibration generated in the axial direction of the motor shaft 12 are improved, the cleaning effect of the electric toothbrush is improved, the requirement of the electric toothbrush on the winding of the rotor coil 1321 is reduced, and the quality and cost of the electric toothbrush can be reduced, the use experience of the electric toothbrush is improved.

The first yoke 152 further includes a shoe plate 1522, the shoe plate 1522 extends from one end of the bobbin plate 1521 away from the center pillar 151 toward both sides in the circumferential direction, the shoe plate 1522 is used for restraining the rotor coil 1321 and preventing the rotor coil 1321 from being separated from the bobbin plate 1521, and one side of the shoe plate 1522 facing the center pillar 151 may be abutted against the rotor coil 1321 to prevent the rotor coil 1321 from being separated from the bobbin plate 1521.

According to the utility model discloses an embodiment, first yoke portion 152 is constructed for a plurality ofly and the interval sets up in the circumference of center post 151, is provided with a plurality of winder plates 1521 at the periphery interval of center post 151, and the one end that center post 151 was kept away from to every winder plate 1521 is provided with shoe plate 1522, all is provided with rotor coil 1321 on every winder plate 1521 to make the periphery of center post 151 be formed with a plurality of rotating magnetic fields, help strengthening the vibration effect of activity yoke portion 15 in the circumference.

As shown in fig. 2, according to an embodiment of the present invention, the second yoke 153 includes a plurality of winding posts spaced apart from each other in the axial direction, the secondary part 142 includes a plurality of secondary coils and respectively winds around the plurality of winding posts, the plurality of secondary coils disposed on the winding posts spaced apart from each other in the axial direction can form a translational magnetic field in the extending direction of the central shaft, the plurality of winding posts are disposed in order in the axial direction by being disposed as fixed positions of the plurality of secondary coils, each secondary part 142 generates an ampere force after a change of the corresponding translational magnetic field and can reciprocate on the axial line, thereby improving a vibration effect of the central shaft in the axial direction.

According to an embodiment of the present invention, the rotor 132 includes a plurality of rotor coils 1321, the rotor coils 1321 are arranged spaced apart from the axis of the motor shaft 12 along the circumferential direction, the stator 131 includes a plurality of magnet pairs, the plurality of magnet pairs are disposed in one-to-one correspondence with the plurality of rotor coils 1321, and each magnet pair includes a first driving magnet 1311 and a second driving magnet 1312 arranged spaced apart from each other along the circumferential direction. The first and second driving magnets 1311 and 1312 are circumferentially spaced apart, and circumferentially spacing the first and second driving magnets 1311 and 1312 may generate an ampere force around the circumference of the motor shaft 12 by the first driving magnet 1311 and the corresponding rotor coil 1321, while the second driving magnet 1312 and the corresponding rotor coil 1321 may generate an ampere force around the circumference of the motor shaft 12, and the driving forces generated by the first and second driving magnets 1311 and 1312 and the corresponding rotor 132 may be circumferentially superimposed to better drive the vibration effect of the motor shaft 12 in the circumferential direction, improving the cleaning efficiency of the toothbrush.

According to an embodiment of the present invention, the secondary part 142 is disposed between the circumferentially adjacent rotor coils 1321, the primary part 141 is disposed between the circumferentially adjacent pairs of magnets, the secondary part 142 is disposed between the rotor coils 1321, so as to fully utilize the circumferential space of the motor shaft 12, avoid the overlap between the rotor coils 1321 and the secondary part 142, make the structure of the motor 1 more compact, reduce the volume of the motor 1, correspondingly, the primary part 141 is disposed between the adjacent pairs of magnets, the primary part 141 can be disposed opposite to the corresponding secondary part 142, the translational magnetic field formed between the primary part 141 and the secondary part 142 can form an ampere force between the primary part 141 and the secondary part 142, so as to realize the axial translational movement of the motor shaft 12. Therefore, the motor shaft 12 can reduce the volume of the motor 1 as much as possible by adopting the arrangement mode under two motion modes of circumferential rotation and translation.

In addition, the magnetic force of the magnet pair is large, and the magnetic force of the primary part 141 is small, so that the interference between the translational magnetic field and the rotational magnetic field can be effectively reduced by arranging the primary part 141 between the magnet pair.

According to an embodiment of the present invention, the motor 1 includes the fixed yoke 16, the fixed yoke 16 is configured as a cylinder with two open ends, the fixed yoke 16 houses the rotor 132, so that the rotor 132 is located inside the fixed yoke 16, the stator 131 includes a stator permanent magnet embedded on the fixed yoke 16, the permanent magnet and a corresponding stator 131 coil form a rotating magnetic field, and configuring the fixed yoke 16 as a cylinder with two open ends can effectively improve the magnetic field strength inside the fixed yoke 16, improve the magnetic flux density of the rotating magnetic field, reduce the magnetic leakage, and improve the rotating effect of the motor 1 in the circumferential direction; the stator permanent magnet is embedded on the fixed yoke 16, so that the stator permanent magnet is ensured to be fixed relative to the fixed yoke 16, and the motor shaft 12 is driven to rotate by the ampere force generated between the stator permanent magnet and the rotor coil 1321.

The primary part 141 is connected to the fixed yoke 16, and the primary part 141 may be fixed with respect to the fixed yoke 16 to further move the secondary part 142 in an axial direction with respect to the primary part 141 by an ampere force generated between the primary part 141 and the secondary part 142.

According to the utility model discloses an embodiment is provided with mounting hole 161 on the fixed yoke portion 16, and elementary part 141 inlays the dress in mounting hole 161, inlays the elementary part 141 and can improve the reliability between elementary part 141 and the fixed yoke portion 16 in the mounting hole 161, helps reducing the shared volume of fixed yoke portion 16 simultaneously, makes the structure of motor 1 compacter.

According to the utility model discloses an embodiment, be formed with recess 162 on the internal perisporium of fixed yoke 16, the stator permanent magnet inlays in recess 162, sets up recess 162 on the internal perisporium of fixed yoke 16, can reduce the volume of fixed yoke 16, provides more sufficient space for the setting of motor shaft 12 and rotor 132 subassembly, inlays the stator permanent magnet in recess 162, can make the stator permanent magnet be connected more reliably with being connected between the fixed yoke 16, and the whole of motor 1 arranges compactlyer.

According to the utility model discloses an embodiment, be formed with spacing portion on the internal perisporium of fixed yoke 16, spacing portion is used for limiting rotor 132's rotation range, because rotor 132 only need can produce the vibration in the reciprocal rotation in week, for avoiding rotor 132's rotation range too big or surpass predetermined rotation range, through setting up the locating part in order to limit rotor 132's rotation range.

According to one embodiment of the present invention, the translational drive assembly 14 is a linear motor 1 assembly, at least one of the primary part 141 and the secondary part 142 is capable of generating an alternating magnetic field, to drive the motor shaft 12 to reciprocate along the axis of the motor 1, one of the primary part 141 and the secondary part 142 may be a wound coil, by changing the direction of the current in the coil and thus the direction of the magnetic field formed on the corresponding primary part 141 or secondary part 142, the other of the corresponding primary and secondary parts 141, 142 may be configured as a permanent magnet, to generate an ampere force under the action of an alternating electric field, because the direction of the alternating magnetic field is changed continuously, the direction of the ampere force is also changed continuously, but the direction of the ampere force is always in the direction of the motor shaft 12, and the continuously changed ampere force is utilized to generate and drive the motor shaft 12 to move in a reciprocating manner in the axial direction so as to drive the electric toothbrush head 19 to generate vibration in the axial direction.

According to an embodiment of the present invention, the secondary part 142 includes one or more rows of secondary coils, and when the secondary part 142 includes a plurality of rows of secondary coils, the plurality of rows of secondary coils are arranged along the circumferential interval, and the primary part 141 is respectively provided on the motor housing 11 corresponding to each row of secondary parts 142. The secondary parts 142 are configured as a row of secondary coils, a plurality of the secondary parts 142 may be sequentially arranged on the circumference of the motor shaft 12, and the corresponding secondary parts 142 are also circumferentially spaced, the direction of the current generated on each secondary coil is the same, and the frequency of the current change on each secondary coil is the same, so that the ampere force in the axial direction is enhanced to increase the vibration intensity of the electric toothbrush in the axial direction, and when a plurality of rows of the secondary parts 142 are provided, a plurality of rows of the secondary parts 142 may be circumferentially spaced on the motor shaft 12, further increasing the vibration effect of the motor shaft 12 in the axial direction.

According to an embodiment of the present invention, the primary parts 141 are at least one row, each row of primary parts 141 is distributed on the motor housing 11 at intervals along the axial direction, the primary parts 141 may correspond to one or more secondary coils, the primary parts 141 may form a translational magnetic field, so that the corresponding secondary coils generate an ampere force in the translational motion, and the plurality of primary parts 141 are arranged at intervals in the axial direction, so as to increase the movable distance of the secondary coils, and increase the movable amplitude of the motor shaft 12 in the axial direction. In some embodiments, the primary parts 141 may be configured in a plurality of rows, the plurality of rows of primary parts 141 being circumferentially spaced apart and corresponding to the plurality of corresponding rows of secondary coils.

According to an embodiment of the present invention, the primary part 141 includes a translational driving magnet installed on the motor housing 11, the translational driving magnet can generate a translational magnetic field, the corresponding secondary coil generates an ampere force in the translational magnetic field, and the driving motor shaft 12 moves in the axial direction under the action of the ampere force.

As shown in fig. 1, according to an embodiment of the present invention, the motor 1 further includes an elastic member 17, the elastic member 17 is connected between the motor housing 11 and the motor shaft 12, so as to drive the motor shaft 12 to return in the axial direction or the circumferential direction, the motor shaft 12 can move in one direction under the driving of the rotation driving component 13 and the translation driving component 14, the motor shaft 12 is connected or contacted with the elastic member 17, so as to deform the elastic member 17 during the movement of the motor shaft 12, and after the ampere force generated by the rotation driving component 13 or the translation driving component 14 disappears or the generated ampere force is reversed, the elastic member 17 can drive the motor shaft 12 to move in the reverse direction, so as to realize the reciprocating movement of the motor shaft 12.

Through the setting of elastic component 17, can improve motor shaft 12 at ascending vibrations effect of axial or circumference, realize motor shaft 12's restoration, can cushion the vibration and improve the travelling comfort that the user used.

According to the utility model discloses an embodiment, motor shaft 12 stretches out from the one end of motor casing 11, and the other end at motor shaft 12 is connected to elastic component 17, and the one end of motor shaft 12 can be connected with the brush head 19 of toothbrush, and the other end of motor shaft 12 is just right with the diapire of the motor casing 11 body, sets up elastic component 17 at the diapire of the motor casing 11 body and the other end of motor shaft 12, can make motor shaft 12 can reset at the ascending removal of axial, has improved the vibration effect of motor shaft 12 in the axial.

According to the utility model discloses an embodiment, elastic component 17 constructs for conical spring, motor casing 11 is connected to conical spring's diameter main aspects, motor shaft 12 is connected to conical spring's diameter tip, conical spring coils the setting, conical spring's diameter tip is located conical spring's centre of a circle department can end with motor shaft 12, and conical spring's diameter tip ends with motor casing 11, can have bigger area of contact, make elastic component 17 more abundant with motor casing 11's contact, improve elastic component 17's stability, also make the diameter tip can kick-back better.

As shown in fig. 4 and 5, according to an embodiment of the present invention, the motor 1 of the electric toothbrush further includes at least one bearing 18, an outer ring 182 of the bearing 18 is slidably disposed on the motor housing 11 along an axis of the motor 1, and an inner ring 181 of the bearing 18 is externally sleeved on the motor shaft 12. The inner ring 181 of the bearing 18 and the outer ring 182 of the bearing 18 can rotate relatively, the motor shaft 12 is connected with the inner ring 181 of the bearing 18, when the motor shaft 12 vibrates in the circumferential direction, the inner ring 181 of the bearing 18 and the outer ring 182 of the bearing 18 rotate relatively, the bearing 18 can effectively support the motor shaft 12, and the stability of the motion of the motor shaft 12 is maintained. When the motor shaft 12 vibrates in the axial direction, the outer race 182 of the bearing 18 slides axially relative to the motor housing 11 to maintain the stability of the vibration of the motor shaft 12 in the axial direction while providing a stable support for the motor shaft 12.

According to the utility model discloses an embodiment, the diameter of the one end of motor casing 11 is reduced into sleeve 183, the one end of motor shaft 12 extends in sleeve 183, bearing 18 is located sleeve 183 and overcoat motor shaft 12, be formed with sleeve 183 that is used for supporting bearing 18 on the casing, thereby the integration degree of motor 1 has been improved, the sealed effect of motor casing 11 has been improved, sleeve 183 that forms in motor casing 11 one end can be used for restricting bearing 18, carry out axial support to bearing 18, ensure motor shaft 12's stable vibration.

The electric toothbrush according to the present invention will be briefly described below.

According to the utility model discloses an electric toothbrush includes handle shell, motor 1 and brush head 19, prescribes a limit to the installation cavity in the handle shell, and the one end of handle shell is equipped with the mating holes, and motor 1 is arbitrary one in the above-mentioned embodiment motor 1, motor 1 are located the installation cavity, and motor shaft 12 stretches out from the mating holes, brush head 19 is located outside the handle shell, brush head 19 is connected on motor shaft 12. Because according to the utility model discloses an electric toothbrush is provided with the motor 1 of above-mentioned embodiment, consequently two kinds of vibration modes of axial vibration and horizontal vibration can be realized to this electric toothbrush's brush head 19, has improved electric toothbrush's cleaning ability, rotates drive assembly 13 and the at least partial coincidence of translational drive assembly 14 at the ascending projection of motor shaft 12 axial, and motor 1's volume is less, makes electric toothbrush's structure compacter, and weight is lighter, and the user is more comfortable to electric toothbrush's gripping.

According to the utility model discloses an embodiment, the interval between brush head 19 and the handle shell is greater than the axial displacement scope of the movable body, and the axial displacement scope that sets up the removal interval between brush head 19 and the handle shell and be greater than the movable body can avoid bumping between brush head 19 and the handle shell, improves the stability of electric toothbrush vibration.

According to the utility model discloses an embodiment, the minimum interval between brush head 19 and the handle shell exceeds 0.5mm, the axial displacement scope of the activity body is no longer than 0.5mm, avoid the activity body too big and lead to producing the damage to the tooth surface at the ascending vibration range of axial on the one hand, in the time of clean tooth surface, also protect the tooth, on the other hand brush head 19 is difficult for the tong when axial displacement, avoid brushing first 19 too far away from the handle shell simultaneously, prevent that the focus of toothbrush is skew, reduce user's the operation degree of difficulty, improve electric toothbrush's use and feel.

According to the utility model discloses an embodiment, establish between motor shaft 12 and the handle shell at bolster 191, bolster 191 can be the cladding in the periphery of motor shaft 12, help buffering motor shaft 12's vibration, improve the travelling comfort when the toothbrush cleans, bolster 191 can construct into the bush, be equipped with lubricating oil between the surface of bush and motor shaft 12, lubricating material such as lubricating powder, or bush and driving medium are self-lubricating material to make, it is smooth and easy to make to slide, and provide the support to motor shaft 12, the cushion collar can play the cushioning effect, noise reduction calibration axle center, improve user's use and experience. While the buffer 191 prevents water from entering the motor 1 from the outer circumference of the motor shaft 12.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (28)

1. A motor for an electric toothbrush, comprising:

a motor housing;

a motor shaft at least partially disposed within the motor housing;

rotate drive assembly, it establishes to rotate drive assembly in the motor casing, rotate drive assembly includes: the stator is fixedly arranged relative to the motor shell, the rotor is connected with the motor shaft, a magnetic field generated by the stator is coupled with a magnetic field generated by the rotor to form a rotating magnetic field, and the rotor drives the motor shaft to rotate when the rotating magnetic field changes;

the translation driving assembly is arranged in the motor shell and comprises: the primary part is fixedly arranged relative to the motor shell, the secondary part is connected with the rotor or the motor shaft, a magnetic field generated by the primary part is coupled with a magnetic field generated by the secondary part to form a translational magnetic field, and the secondary part drives the motor shaft to translate along the axis of the motor when the translational magnetic field changes; wherein the content of the first and second substances,

the projections of the rotary driving component and the translational driving component on the axis of the motor are at least partially overlapped.

2. The motor for an electric toothbrush of claim 1, wherein the translational drive assembly is de-energized when the rotational drive assembly is energized and the rotational drive assembly is de-energized when the translational drive assembly is energized.

3. The motor for an electric toothbrush of claim 1, wherein the rotary drive assembly is a sonic motor assembly, and at least one of the stator and the rotor is capable of generating an alternating magnetic field to cause alternating positive and negative rotation of the motor shaft about an axis of the motor.

4. The motor of the electric toothbrush of claim 3, wherein the stator comprises: the first driving magnet and the second driving magnet are arranged at intervals along the circumferential direction;

the rotor includes: the rotor coil, rotor coil is the annular, rotor coil's annular center line is located first driving magnet with the second driving magnet is relative in the contained angle that the axis of motor formed.

5. The motor of the electric toothbrush according to claim 1, wherein the rotor and the secondary part are provided at intervals in a circumferential direction of the motor shaft, the stator and the primary part are provided at intervals in the circumferential direction of the motor shaft, the rotor corresponds to the stator, and the secondary part corresponds to the primary part.

6. The motor of the electric toothbrush according to claim 1, further comprising: the movable yoke part is connected with the motor shaft, and the rotor and the secondary part are both installed on the movable yoke part.

7. The motor of the electric toothbrush of claim 6, wherein the yoke portion comprises:

the central column is connected with the motor shaft and extends along the axis of the motor;

a first yoke portion connected on a side of the center post, the rotor being disposed on the first yoke portion;

the second yoke portion is connected on the other side of the center post, the second yoke portion and the first yoke portion are located on different sides of the center post, and the secondary part is arranged on the second yoke portion.

8. The motor of an electric toothbrush of claim 7, wherein the rotor includes a rotor coil, the first yoke portion including:

the winding plate is connected with the central column and extends along the axis of the motor, and the rotor coil is wound on the winding plate;

and the boot plate extends to two circumferential sides from one end of the winding plate far away from the central column.

9. The motor of the electric toothbrush of claim 7, wherein the second yoke includes a plurality of bobbins spaced apart in an axial direction, and the secondary part includes a plurality of secondary coils and is wound on the plurality of bobbins, respectively.

10. The motor for an electric toothbrush of claim 1, wherein the rotor includes a plurality of rotor coils arranged in a circumferentially spaced apart relationship with respect to an axis of the motor, and the stator includes a plurality of magnet pairs arranged in a one-to-one correspondence with the plurality of rotor coils, each of the magnet pairs including a first drive magnet and a second drive magnet distributed in a circumferentially spaced apart relationship.

11. The motor of the electric toothbrush according to claim 10, wherein the secondary part is disposed between circumferentially adjacent ones of the rotor coils, and the primary part is disposed between circumferentially adjacent ones of the pairs of magnets.

12. The motor of the electric toothbrush according to claim 1, further comprising: a fixed yoke having a cylindrical shape with both ends open, the fixed yoke housing the rotor, the primary part being connected to the fixed yoke;

the stator includes a stator permanent magnet embedded on the fixed yoke.

13. The motor of the electric toothbrush according to claim 12, wherein the fixing yoke is provided with a mounting hole, and the primary part is fitted in the mounting hole.

14. The motor of the electric toothbrush according to claim 12, wherein a groove is formed on an inner circumferential wall of the fixed yoke, and the stator permanent magnet is embedded in the groove.

15. The motor of the electric toothbrush according to claim 12, wherein a stopper for limiting a rotation range of the rotor is formed on an inner circumferential wall of the fixed yoke.

16. The electric toothbrush motor of claim 1, wherein the translational drive assembly is a linear motor assembly, and at least one of the primary part and the secondary part is capable of generating an alternating magnetic field to reciprocate the motor shaft along the motor axis.

17. The motor of the electric toothbrush according to claim 16, wherein the secondary member includes one or more rows of secondary coils, the rows of secondary coils being circumferentially spaced apart when the secondary member includes a plurality of rows of secondary coils, the primary member being provided on the motor housing for each row of the secondary member.

18. The electric toothbrush motor of claim 16, wherein the primary members are in at least one row, each row of the primary members being spaced apart axially on the motor housing.

19. The motor for an electric toothbrush of claim 16, wherein the primary component comprises a translational drive magnet mounted on the motor housing.

20. The motor of the electric toothbrush according to any one of claims 1 to 19, further comprising: the elastic piece is connected between the motor shell and the motor shaft so as to drive the motor shaft to reset in the axial direction and/or the circumferential direction.

21. The motor of the electric toothbrush of claim 20, wherein the motor shaft extends from one end of the motor housing, and the elastic member is coupled to the other end of the motor shaft.

22. The motor of the electric toothbrush according to claim 21, wherein the elastic member is a conical spring, a diameter large end of the conical spring is connected to the motor housing, and a diameter small end of the conical spring is connected to the motor shaft.

23. The motor of the electric toothbrush of any one of claims 1-19, further comprising: the outer ring of the bearing is slidably arranged on the motor shell along the axis of the motor, and the inner ring of the bearing is sleeved outside the motor shaft.

24. The motor of the electric toothbrush as claimed in claim 23, wherein an end of the motor housing is reduced in diameter to form a sleeve into which an end of the motor shaft extends, the bearing being positioned within the sleeve and housing the motor shaft.

25. An electric toothbrush, comprising:

the handle comprises a handle shell, a mounting cavity is defined in the handle shell, and a matching hole is formed in one end of the handle shell;

a motor of the electric toothbrush according to any one of claims 1-24, the motor being located within the mounting cavity, the motor shaft extending from the mating aperture;

the brush head is positioned outside the handle shell and connected to the motor shaft.

26. The powered toothbrush as defined in claim 25, wherein a spacing between the brushhead and the handle housing is greater than an axial range of movement of the yoke portion.

27. The electric toothbrush of claim 26, wherein the minimum spacing between the brush head and the handle housing exceeds 0.5 mm.

28. The electric toothbrush of claim 25, wherein a buffer is provided between the motor shaft and the handle housing.

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