CN220307055U - Motor and electric toothbrush - Google Patents

Abstract

The application discloses a motor and an electric toothbrush, wherein the motor comprises a shell, a first output shaft, a first driving mechanism and an end cover assembly; a part of the first output shaft extends into the accommodating cavity of the shell; the first driving mechanism is used for driving the first output shaft to rotate around the axis of the first output shaft; the end cover assembly is connected to the end part of the shell, and part of the first output shaft extends out of the accommodating cavity and penetrates through the end cover assembly; the end cover assembly comprises an elastic support and a connecting piece, the elastic support is connected with the shell, the first output shaft is connected with the elastic support through the connecting piece, and when the first output shaft rotates around the axis of the first output shaft, the connecting piece is driven to rotate, so that the elastic support is elastically deformed along the circumferential direction of the first output shaft, and elastic restoring force is provided for the first output shaft through the elastic support when the first output shaft rotates. The swing amplitude of the first output shaft can be improved, so that the vibration intensity of the brush head can be enhanced, and the cleaning effect of the electric toothbrush is improved.

Description

Motor and electric toothbrush

Technical Field

The application relates to the technical field of oral cavity cleaning equipment, in particular to a motor and an electric toothbrush.

Background

In electric toothbrushes, the brush head is typically coupled to an output shaft of a motor, and the motor vibrates the brush head, thereby cleaning the user's mouth.

However, in the related art, the swing of the output shaft is weak, resulting in weak vibration of the brush head, thereby resulting in poor cleaning effect of the electric toothbrush.

Disclosure of Invention

The application provides a motor and electric toothbrush can strengthen the swing intensity of output shaft to strengthen the vibration intensity of brush head, thereby promote electric toothbrush's cleaning performance.

In a first aspect, the present application provides a motor comprising: a housing having a receiving cavity; a first output shaft, part of which extends into the accommodating cavity; the first driving mechanism is arranged in the accommodating cavity and connected with the shell, and is used for driving the first output shaft to rotate around the axis of the first output shaft; and an end cap assembly connected to an end of the housing, a portion of the first output shaft extending out of the receiving cavity and through the end cap assembly; the end cover assembly comprises an elastic support and a connecting piece, the elastic support is connected with the shell, the first output shaft is connected with the elastic support through the connecting piece, and when the first output shaft rotates around the axis of the first output shaft, the connecting piece is driven to rotate, so that the elastic support is elastically deformed along the circumferential direction of the first output shaft, and elastic restoring force is provided for the first output shaft through the elastic support when the first output shaft rotates.

In some embodiments of the present application, the elastic support extends along the periphery of the first output shaft, a notch is provided on the elastic support, the notch penetrates through the inner side and the outer side of the elastic support, and the notch extends along the axial direction of the first output shaft to penetrate through the two ends of the elastic support; the two sides of the notch are respectively a first end and a second end of the elastic support, the first end of the elastic support is connected with the shell, and the second end of the elastic support is connected with the connecting piece. So that the elastic support is easier to elastically deform in the circumferential direction of the first output shaft.

In some embodiments of the present application, the end cap assembly further comprises: the elastic support is connected with the shell through the connecting support. The elastic support and the shell are more convenient to connect, the connection strength of the elastic support and the shell can be improved, and the elastic support is prevented from being separated from the shell.

In some embodiments of the present application, the elastic support and the housing are arranged at intervals in an axial direction of the first output shaft, and a gap is formed between the elastic support and the connecting support in the axial direction of the first output shaft. The resistance that receives when can reduce the linking bridge and take place elastic deformation for the deformation of linking bridge is more free.

In some embodiments of the present application, an end of the housing is provided with an opening in communication with the receiving cavity, a portion of the connecting bracket is located at the opening, the connecting bracket can open and seal the opening, and the first output shaft passes through the connecting bracket. The water liquid and dirt can be prevented from entering the accommodating cavity through the opening, and an additional sealing plug can be omitted, so that the production cost of the motor can be reduced.

In some embodiments of the present application, the connecting member is provided with a through hole extending along an axial direction of the first output shaft, and the first output shaft passes through the through hole to pass through the connecting member; the elastic support extends along the periphery of the connecting piece, and the connecting piece is connected with the inner side of the elastic support. The space formed by the surrounding of the elastic support can be fully utilized, and the volume of the end cover assembly is reduced, so that the volume of the motor is reduced.

In some embodiments of the present application, the connecting member is in a block shape to increase the moment of inertia of the first output shaft. The throwing force of the first output shaft is improved, and when the motor is applied to the electric toothbrush, the cleaning effect on teeth can be improved.

In some embodiments of the present application, the connector is asymmetric about an axis of the first output shaft. The swing amplitude of the first output shaft can be increased, so that the vibration of the first output shaft is more intense.

In some embodiments of the present application, the end cap assembly further comprises: the stop limiting structure is connected with the shell and is positioned on the rotating path of the connecting piece, and when the connecting piece rotates to a preset position along with the first output shaft, the stop limiting structure is abutted with the connecting piece so as to prevent the connecting piece from rotating. The first output shaft can be limited by a preset rotation angle.

In some embodiments of the present application, the end cover assembly further includes a connection bracket, the elastic bracket extends along the periphery of the first output shaft, a notch is provided on the elastic bracket, the notch penetrates through the inner side and the outer side of the elastic bracket, and the notch extends along the axial direction of the first output shaft to penetrate through the two ends of the elastic bracket; the two sides of the notch are respectively a first end and a second end of the elastic support, the first end of the elastic support is connected with the shell, the second end of the elastic support is connected with the shell through the connecting support, and the part of the connecting support extends to the inner side of the elastic support through the notch so as to form the stop limiting structure. No additional parts are needed to be arranged to be used as a stop limit structure, so that the cost of the motor is reduced.

In some embodiments of the present application, the first driving mechanism includes: the first magnet is sleeved on the first output shaft and is connected with the first output shaft; the first stator assembly comprises a first coil bracket and a first coil winding, the first coil bracket is arranged around the periphery of the first magnet and is connected with the shell, and the first coil winding is wound on the first coil bracket; when the first coil winding is electrified, the first magnet is driven to drive the first output shaft to rotate around the axis of the first output shaft. When the first coil winding is electrified, a magnetic field is generated, and the magnetic field generated by the first coil winding is matched with the magnetic field generated by the first magnet, so that the first output shaft can be driven to rotate around the axial lead of the first output shaft.

In some embodiments of the present application, the motor further comprises: the second output shaft is positioned in the accommodating cavity, and the axial direction of the second output shaft is the same as the axial direction of the first output shaft; the second driving mechanism is arranged in the accommodating cavity and connected with the shell, and is used for driving the second output shaft to move along the axial direction of the second output shaft so as to drive the first output shaft to move along the axial direction of the first output shaft. The reciprocating swing and the linear reciprocating motion are combined, so that tooth stains are removed more effectively, and the tooth cleaning effect can be improved.

In some embodiments of the present application, an end of the first output shaft extending out of the accommodating cavity is an output end, the first driving mechanism and the second driving mechanism are arranged along an axial direction of the first output shaft, and the first driving mechanism is located at a side, close to the output end, of the second driving mechanism. The swing amplitude of the first output shaft can be increased, so that the first output shaft vibrates more severely, and the cleaning effect can be further improved.

In some embodiments of the present application, the first output shaft is integrally formed with the second output shaft. And the connection strength of the first output shaft and the second output shaft is improved.

In some embodiments of the present application, the first output shaft forms a non-rotational fit with the connecting member, such that the connecting member can rotate with the first output shaft about an axis of the first output shaft, and the first output shaft forms a sliding fit with the connecting member, such that the first output shaft can move relative to the connecting member along an axial direction of the first output shaft. The connecting piece can rotate along with the first output shaft, and the first output shaft can independently slide along the axial direction of the first output shaft relative to the connecting piece.

In some embodiments of the present application, the connecting member is provided with a through hole extending along an axial direction of the first output shaft, and the first output shaft passes through the through hole to pass through the connecting member; the through hole is a non-circular hole, the first output shaft comprises a matching part positioned in the through hole, and the shape of the cross section of the matching part is matched with the shape of the through hole, so that the first output shaft and the connecting piece form non-rotary matching; the engagement portion is movable relative to the through hole in an axial direction of the first output shaft to form a sliding engagement between the first output shaft and the connecting member. When the first output shaft rotates, the connecting piece is driven to rotate through the matching part, and the connecting piece can rotate along with the first output shaft due to the fact that the matching part can move along the axial direction of the first output shaft relative to the through hole, and the first output shaft can slide independently along the axial direction of the first output shaft relative to the connecting piece.

In some embodiments of the present application, the second driving mechanism includes: the vibrator assembly is sleeved on the second output shaft and connected with the second output shaft, and the vibrator assembly is provided with a plurality of N-pole magnetic poles and S-pole magnetic poles which are alternately arranged along the axial direction of the second output shaft; the second stator assembly comprises a second coil bracket and a plurality of second coil windings, the second coil bracket is arranged around the periphery of the vibrator assembly and is connected with the shell, the second coil windings are arranged on the second coil bracket and are arranged around the periphery of the second output shaft, and the second coil windings are arranged at intervals along the axial direction of the second output shaft; the magnetic conduction piece is positioned between two adjacent second coil windings, is arranged on the second coil bracket and extends around the periphery of the second output shaft; when the second coil windings are not electrified, each magnetic conduction piece corresponds to the junction of the N pole magnetic pole and the S pole magnetic pole, and when the second coil windings are electrified, the current flow directions of the adjacent two second coil windings are opposite so as to drive the vibrator assembly and the second output shaft to reciprocate along the axial direction of the second output shaft. The kinetic energy loss can be reduced, the output thrust of the motor is improved, and the second stator assembly is not connected with the vibrator assembly through a transmission mechanism such as a gear assembly, so that noise generated during the operation of the transmission mechanism can be eliminated.

In a second aspect, the present application also provides an electric toothbrush comprising a handle, a head and a motor as described in any of the embodiments above; the brush handle is provided with a containing cavity, the motor is arranged in the containing cavity, one end of the first output shaft is arranged in the containing cavity, and the other end of the first output shaft penetrates out of the containing cavity and is positioned outside the brush handle; the brush head is detachably connected with one end of the first output shaft, which is positioned outside the brush handle.

The beneficial effects of this application are: when the first driving mechanism drives the first output shaft to rotate clockwise, the connecting piece is driven to rotate, so that the elastic support is stretched or compressed through the connecting piece, elastic deformation of the elastic support in the circumferential direction of the first output shaft is taken as an example, when the first driving mechanism stops driving the first output shaft, the elastic support is restored to the original state, and elastic restoring force is provided for the first output shaft, so that the first output shaft rotates and returns along the anticlockwise fast, the elastic support can resonate with the first output shaft in the process of reciprocating swing of the first output shaft, the swing amplitude of the first output shaft can be improved, the vibration intensity of the brush head can be enhanced, and the cleaning effect of the electric toothbrush is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic diagram of a motor according to an embodiment of the present application;

FIG. 2 is a schematic view of a portion of a motor according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a motor according to an embodiment of the present disclosure with a first output shaft removed;

FIG. 4 is a schematic view of a portion of a motor according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram illustrating the connection between the first output shaft and the connecting member according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a portion of a first output shaft according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a second driving mechanism according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a limiting component according to an embodiment of the present disclosure;

fig. 9 is a schematic view of an electric toothbrush according to an embodiment of the present application.

Reference numerals:

10. A housing; 11. a receiving chamber; 12. an opening; 21. a first output shaft; 211. an output end; 212. a mating portion; 22. a second output shaft; 30. a first driving mechanism; 31. a first magnet; 32. a first stator assembly; 321. a first coil bracket; 40. an end cap assembly; 41. an elastic support; 411. a notch; 412. a first end; 413. a second end; 42. a connecting piece; 421. a through hole; 43. a connecting bracket; 431. a stop limit structure; 50. a second driving mechanism; 51. a vibrator assembly; 511. an N pole; 512. s pole; 52. a second stator assembly; 521. a second coil support; 522. a second coil winding; 53. a magnetic conductive member; 60. a limit component; 61. a bearing; 611. an outer ring; 612. an inner ring; 62. an elastic member; 63. a bearing seat; 70. a brush handle; 80. a brush head.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The application provides a motor and electric toothbrush to in solving the correlation technique, the swing of output shaft is weaker, leads to the vibration of brush head weaker, thereby leads to electric toothbrush's the relatively poor problem of cleaning effect.

In a first aspect, the present application provides a motor, as shown in fig. 1 and 2, comprising a housing 10, a first output shaft 21, a first drive mechanism 30, and an end cap assembly 40.

Specifically, the housing 10 has a housing chamber 11, the housing 10 is used for protecting components in the housing chamber 11, and the overall shape of the housing 10 may be cylindrical; a portion of the first output shaft 21 extends into the accommodation chamber 11; the first driving mechanism 30 is disposed in the accommodating cavity 11 and connected with the housing 10, and the first driving mechanism 30 is used for driving the first output shaft 21 to rotate around the axis of the first output shaft 21; an end cap assembly 40 is attached to the end of the housing 10, and a portion of the first output shaft 21 extends out of the receiving chamber 11 and through the end cap assembly 40.

It will be appreciated that when the motor is used in an electric toothbrush, the brush head 80 (as shown in fig. 9) of the electric toothbrush may be mounted on the first output shaft 21, and the first output shaft 21 may be driven by the first driving mechanism 30 to reciprocate, so that the brush head 80 may clean teeth at multiple angles, and the cleaning effect on teeth may be improved.

More specifically, with continued reference to fig. 1 and 2, the end cap assembly 40 includes an elastic support 41 and a connecting member 42, the elastic support 41 is connected to the housing 10, the first output shaft 21 is connected to the elastic support 41 through the connecting member 42, and when the first output shaft 21 rotates around the axis of the first output shaft 21, the connecting member 42 is driven to rotate, so that the elastic support 41 is elastically deformed along the circumferential direction of the first output shaft 21, so as to provide an elastic restoring force for the first output shaft 21 through the elastic support 41 when the first output shaft 21 rotates.

It should be noted that, the elastic support 41 is made of an elastic material, which may be elastic metal, elastic plastic or other materials, and the application is not limited specifically; when the first driving mechanism 30 drives the first output shaft 21 to rotate clockwise, the connecting piece 42 is driven to rotate, so that the elastic support 41 is stretched or compressed through the connecting piece 42, elastic deformation of the elastic support 41 in the circumferential direction of the first output shaft 21 is taken as an example, when the first driving mechanism 30 stops driving the first output shaft 21, the elastic support 41 returns to the original state, and elastic restoring force is provided for the first output shaft 21, so that the first output shaft 21 rotates and returns rapidly anticlockwise, and resonance can be generated between the elastic support 41 and the first output shaft 21 in the process of reciprocating swing of the first output shaft 21, so that the swing amplitude of the first output shaft 21 can be improved, the vibration intensity of the brush head 80 can be enhanced, and the cleaning effect of the electric toothbrush is improved.

In addition, compared to providing an exposed spring to provide an elastic restoring force for the first output shaft 21, the need to socket the spring over the portion of the first output shaft 21 that protrudes from the receiving cavity 11, the provision of the spring may result in a shortening of the usable portion of the first output shaft 21, and the exposed spring may affect the reliability of the motor; in this application, by multiplexing the components in the end cover assembly 40 into the elastic support 41, the elastic support 41 is utilized to provide the elastic restoring force for the first output shaft 21, and no additional spring is required, so that the available portion of the first output shaft 21 is shortened due to the spring, and the problem that the exposed spring affects the reliability of the motor can be avoided.

As shown in fig. 1 and 3, in an embodiment of the present application, the elastic support 41 extends along the outer periphery of the first output shaft 21, the elastic support 41 is provided with a notch 411, the notch 411 penetrates through the inner side and the outer side of the elastic support 41, and the notch 411 extends along the axial direction of the first output shaft 21 to penetrate through two ends of the elastic support 41.

The two sides of the notch 411 are a first end 412 and a second end 413 of the elastic support 41, the first end 412 of the elastic support 41 is connected with the housing 10, and the second end 413 of the elastic support 41 is connected with the connecting piece 42. It can be appreciated that when the first driving mechanism 30 drives the first output shaft 21 to rotate clockwise, the first output shaft 21 drives the second end 413 of the elastic support 41 to move relative to the first end 412, so that the elastic support 41 is elastically deformed in the circumferential direction of the first output shaft 21, and the notch 411 "breaks" the elastic support 41, so that the elastic support 41 is more easily elastically deformed in the circumferential direction of the first output shaft 21.

With continued reference to fig. 1 and 2, in one embodiment of the present application, the connecting member 42 is provided with a through hole 421 extending in the axial direction of the first output shaft 21, and the first output shaft 21 passes through the through hole 421 to pass through the connecting member 42.

Wherein the elastic support 41 extends along the outer circumference of the connection member 42, and the connection member 42 is connected to the inner side of the elastic support 41. It can be appreciated that, by sleeving the connecting piece 42 on the first output shaft 21 and arranging the connecting piece 42 in the space formed by surrounding the elastic support 41, the space formed by surrounding the elastic support 41 can be fully utilized, and the volume of the end cover assembly 40 is reduced, so that the volume of the motor is reduced.

With continued reference to FIG. 3, in some embodiments of the present application, the end cap assembly 40 further includes a connection bracket 43, and the resilient bracket 41 is connected to the housing 10 by the connection bracket 43; it will be appreciated that the direct connection of the elastic support 41 to the housing 10 is less convenient than the direct connection of the elastic support 41 to the housing 10, and the contact area of the elastic support 41 to the housing 10 is smaller, which results in an insufficiently stable connection of the elastic support 41 to the housing 10, resulting in easy detachment of the elastic support 41 from the housing 10; in the embodiment of the application, the elastic support 41 is connected with the shell 10 through the connecting support 43, so that the elastic support 41 is more convenient to connect with the shell 10, and the shape of the connecting support 43 can be designed according to the shapes of the elastic support 41 and the shell 10, so that the elastic support 41 and the connecting support 43 and the shell 10 and the connecting support 43 have larger contact areas, the connection strength of the elastic support 41 and the shell 10 can be improved, and the elastic support 41 is prevented from being separated from the shell 10.

Specifically, the elastic bracket 41 is connected with the connection bracket 43, and the connection bracket 43 is connected with the housing 10 so that the elastic bracket 41 is connected with the housing 10; more specifically, the first end 412 of the elastic bracket 41 is connected to the connection bracket 43; alternatively, the elastic support 41 may be connected to the connection support 43 by riveting, welding, bolting, gluing or clamping, and the connection support 43 may be connected to the housing 10 by riveting, welding, bolting, gluing or clamping.

As shown in fig. 4, in an embodiment of the present application, the elastic support 41 and the housing 10 are arranged at intervals in the axial direction of the first output shaft 21, and a gap is provided between the elastic support 41 and the connection support 43 in the axial direction of the first output shaft 21. It will be appreciated that the elastic support 41 is spaced from the connecting support 43 in the axial direction of the first output shaft 21, so that friction between the elastic support 41 and the connecting support 43 when the elastic support 41 is elastically deformed in the circumferential direction of the first output shaft 21 can be prevented, and resistance to the elastic deformation of the connecting support 43 can be reduced, so that the connecting support 43 is more free to deform. It should be further noted that, the specific value of the gap interval is selected according to the actual requirement, and the application is not specifically limited.

With continued reference to fig. 4, in one embodiment of the present application, the end of the housing 10 is provided with an opening 12 communicating with the accommodating chamber 11, a portion of the connection bracket 43 is located at the opening 12, the connection bracket 43 can open and seal the opening 12, and the first output shaft 21 passes through the connection bracket 43. It can be understood that by disposing the portion of the connection bracket 43 at the opening 12, the contact area of the connection bracket 43 and the housing 10 can be raised, so that the connection strength of the connection bracket 43 and the housing 10 can be raised; in addition, by multiplexing the portion of the connection bracket 43 as a sealing plug that can seal the opening 12, water and dirt can be prevented from entering the accommodating chamber 11 through the opening 12, and an additional sealing plug can be unnecessary, so that the production cost of the motor can be reduced.

With continued reference to FIG. 4, in one embodiment of the present application, the connecting member 42 is massive to increase the moment of inertia of the first output shaft 21; it will be appreciated that when the first output shaft 21 swings, the connecting member 42 swings along with the first output shaft 21, and compared with the connecting member 42 being formed in a shape of a thin disc or a sheet, the mass of the block-shaped connecting member 42 is larger, so that the moment of inertia of the first output shaft 21 can be increased, and the throwing force of the first output shaft 21 can be improved, and when the motor is applied to an electric toothbrush, the cleaning effect on teeth can be improved.

Alternatively, the connecting piece 42 is asymmetric about the axis of the first output shaft 21, that is, the connecting piece 42 is an eccentric structure asymmetric about the axis of the first output shaft 21, and centrifugal force is generated when the connecting piece 42 swings with the first output shaft 21, so that the axis of the first output shaft 21 is offset, and the swing amplitude of the first output shaft 21 can be increased, so that the vibration of the first output shaft 21 is more intense, and the cleaning effect on teeth can be further improved. More specifically, the connecting member 42 may be an eccentric block structure, such as an eccentric wheel, a triangular cylinder-to-cylinder joint, a triangular cylinder-to-square joint, or the like.

With continued reference to fig. 4, in an embodiment of the present application, the end cover assembly 40 further includes a stop limiting structure 431, where the stop limiting structure 431 is connected to the housing 10, the stop limiting structure 431 is located on a rotation path of the connecting member 42, and when the connecting member 42 rotates with the first output shaft 21 to a preset position, the stop limiting structure 431 abuts against the connecting member 42 to prevent the connecting member 42 from rotating. It can be understood that the stop limiting structure 431 can limit the first output shaft 21 by a preset rotation angle, taking the rotation of the first output shaft 21 in a clockwise direction as an example, the connecting piece 42 rotates in a direction close to the stop limiting structure 431, when the first driving mechanism 30 drives the first output shaft 21 to rotate in a clockwise direction until the connecting piece 42 abuts against the stop limiting structure 431, the stop limiting structure 431 can prevent the connecting piece 42 and the first output shaft 21 from continuing to rotate in a clockwise direction, at this time, the first driving mechanism 30 stops driving the first output shaft 21, and the first output shaft 21 can rotate in a counterclockwise direction under the driving of the elastic support 41, so that the first output shaft 21 swings reciprocally.

Further, a portion of the connecting bracket 43 extends to the inner side of the elastic bracket 41 through the notch 411 to form a stop limit structure 431. It can be understood that the stop limit structure 431 is formed by a portion of the connection bracket 43, and no additional component is required to be provided as the stop limit structure 431, so that the cost of the motor is reduced, and the contact area between the connection bracket 43 and the elastic bracket 41 is increased, so that the connection strength between the connection bracket 43 and the elastic bracket 41 is improved; in addition, the stop limiting structure 431 is located in the space surrounded by the elastic support 41, so that the space surrounded by the elastic support 41 can be fully utilized, the volume of the end cover assembly 40 is reduced, and the volume of the motor is reduced.

As shown in fig. 2, in some embodiments of the present application, the first drive mechanism 30 includes a first magnet 31 and a first stator assembly 32.

Specifically, the first magnet 31 is sleeved on the first output shaft 21 and is connected with the first output shaft 21; the first stator assembly 32 includes a first coil support 321 and a first coil winding, where the first coil support 321 is enclosed on the periphery of the first magnet 31 and connected to the housing 10, and the first coil winding is wound on the first coil support 321.

When the first coil winding is energized, the first magnet 31 is driven to drive the first output shaft 21 to rotate around the axis of the first output shaft 21. It should be noted that, when the first coil winding is energized, a magnetic field is generated, and the magnetic field generated by the first coil winding and the magnetic field generated by the first magnet 31 are mutually matched, so that the first output shaft 21 can be driven to rotate around the axis of the first output shaft 21; it should be noted that, since the magnetic pole of the magnetic field generated by the first coil winding is related to the flow direction of the current in the first coil winding, the magnetic pole of the magnetic field generated by the first coil winding can be changed by changing the flow direction of the current in the first coil winding, so that the first output shaft 21 can be driven to oscillate reciprocally around the axis of the first output shaft 21, for example, when the flow direction of the current in the first coil winding is forward, the first output shaft 21 rotates clockwise, and when the flow direction of the current in the first coil winding is reverse, the second output shaft 22 rotates counterclockwise.

With continued reference to fig. 2, in some embodiments of the present application, the motor further includes a second output shaft 22 and a second drive mechanism 50.

Wherein the second output shaft 22 is positioned in the accommodating cavity 11, and the axial direction of the second output shaft 22 is the same as the axial direction of the first output shaft 21; the second driving mechanism 50 is disposed in the accommodating cavity 11 and connected to the housing 10, and the second driving mechanism 50 is configured to drive the second output shaft 22 to move along the axial direction of the second output shaft 22, so as to drive the first output shaft 21 to move along the axial direction of the first output shaft 21.

When the motor is applied to the electric toothbrush, the brush head 80 of the electric toothbrush is mounted on the first output shaft 21, the first output shaft 21 can swing reciprocally around the axis of the first output shaft 21 under the driving of the first driving mechanism 30, so that the brush head 80 can clean teeth in a multi-angle manner, in addition, the first output shaft 21 can also reciprocate linearly along the axial direction of the first output shaft 21 under the driving of the second driving mechanism 50, so that the brush head 80 can clean teeth reciprocally in a certain position, and the tooth stain can be removed more effectively by combining the reciprocal swing with the linear reciprocal motion, so that the cleaning effect on the teeth can be improved.

Further, an end of the first output shaft 21 extending out of the accommodating cavity 11 is an output end 211, the first driving mechanism 30 and the second driving mechanism 50 are arranged along the axial direction of the first output shaft 21, and the first driving mechanism 30 is located at one side of the second driving mechanism 50 close to the output end 211.

It can be appreciated that, the output end 211 is one end of the first output shaft 21 for mounting the brush head 80, in general, the mass of the first driving mechanism 30 for driving the first output shaft 21 to rotate is greater than the mass of the second driving mechanism 50 for driving the first output shaft 21 to move linearly, in this embodiment, the first driving mechanism 30 is located at a side close to the output end 211 and the second driving mechanism 50 is located at a side far away from the output end 211, when the first output shaft 21 rotates, if the first output shaft 21 has a shaft axis deviation condition, because the mass of the first driving mechanism 30 is greater and the first driving mechanism 30 is closer to the output end 211, the influence of the first driving mechanism 30 on the centrifugal movement of the first output shaft 21 is also greater, so that the deviation amplitude of the shaft axis of the first output shaft 21 can be increased, and the swing amplitude of the first output shaft 21 can be increased, so that the vibration of the first output shaft 21 is more severe, and the cleaning effect can be further improved.

In an alternative embodiment, the first output shaft 21 may be integrally formed with the second output shaft 22, so as to improve the connection strength between the first output shaft 21 and the second output shaft 22 and prevent the connection between the first output shaft 21 and the second output shaft 22 from being broken.

As shown in fig. 5 and 6, in some embodiments of the present application, the first output shaft 21 forms a non-rotational fit with the connecting member 42 such that the connecting member 42 can rotate with the first output shaft 21 about the axis of the first output shaft 21, and the first output shaft 21 forms a sliding fit with the connecting member 42 such that the first output shaft 21 can move relative to the connecting member 42 in the axial direction of the first output shaft 21. It will be appreciated that the first output shaft 21 forms a non-rotational and sliding fit with the connecting member 42 such that the connecting member 42 is rotatable with the first output shaft 21 and the first output shaft 21 is independently slidable relative to the connecting member 42 in the axial direction of the first output shaft 21.

Specifically, the through hole 421 is a non-circular hole, the first output shaft 21 includes a mating portion 212 located in the through hole 421, and the cross-sectional shape of the mating portion 212 is adapted to the shape of the through hole 421, so that the first output shaft 21 forms a non-rotating fit with the connecting member 42; the fitting portion 212 is movable in the axial direction of the first output shaft 21 with respect to the through hole 421 to bring the first output shaft 21 into sliding fit with the connecting member 42. It should be noted that, when the first output shaft 21 rotates, the coupling member 42 is driven to rotate by the engaging portion 212, and since the engaging portion 212 can move along the axial direction of the first output shaft 21 relative to the through hole 421, the coupling member 42 can rotate along with the first output shaft 21, and the first output shaft 21 can slide independently along the axial direction of the first output shaft 21 relative to the coupling member 42. The shape of the through hole 421 may be square, rectangle, triangle, rectangle or other non-circular shape, which is not particularly limited in this application.

As shown in fig. 7, in some embodiments of the present application, the second driving mechanism 50 includes a vibrator assembly 51, a second stator assembly 52, and a magnetic conductive member 53.

Specifically, the vibrator assembly 51 is sleeved on the second output shaft 22 and is connected with the second output shaft 22, and the vibrator assembly 51 has a plurality of N-pole magnetic poles 511 and S-pole magnetic poles 512 alternately arranged along the axial direction of the second output shaft 22;

the second stator assembly 52 includes a second coil bracket 521 and a plurality of second coil windings 522, the second coil bracket 521 is disposed around the periphery of the vibrator assembly 51 and connected to the housing 10, the second coil windings 522 are mounted on the second coil bracket 521 and disposed around the periphery of the second output shaft 22, and the plurality of second coil windings 522 are arranged at intervals along the axial direction of the second output shaft 22; the magnetic conduction piece 53 is located between two adjacent second coil windings 522, and the magnetic conduction piece 53 is mounted on the second coil bracket 521 and extends around the periphery of the second output shaft 22;

when the second coil windings 522 are not energized, each magnetic conductive member 53 corresponds to the junction between the N pole 511 and the S pole 512, and when the second coil windings 522 are energized, the current flow directions of the adjacent two second coil windings 522 are opposite, so as to drive the vibrator assembly 51 and the second output shaft 22 to reciprocate along the axial direction of the second output shaft 22.

In this embodiment, the first output shaft 21 may directly reciprocate linearly, and the magnetic driving force between the second stator assembly 52 and the vibrator assembly 51 is used as the thrust of the first output shaft 21 for rectilinear motion, so that the motion conversion is more direct and efficient, thereby reducing the kinetic energy loss and improving the output thrust of the motor, and the second stator assembly 52 and the vibrator assembly 51 do not need to be connected through a transmission mechanism such as a gear assembly, so that the noise generated during the operation of the transmission mechanism can be eliminated.

It should be noted that, the magnetic conductive member 53 may be an object capable of conducting magnetic flux, such as an iron core, and the uppermost magnetic pole in the vibrator assembly 51 is an N-pole magnetic pole 511, and in fig. 7, "X" represents that the current direction of the second coil winding 522 is in a direction perpendicular to the paper surface; "." represents that the current flow direction of the second coil winding 522 is out of the plane of the paper; the direction of current flow of the second coil winding 522 during the upper energized half-cycle is as shown in fig. 7 (the lower half-cycle commutates); the direction of the magnetic field generated by the second coil windings 522 is determined to be the vertical direction according to the right hand rule, but the directions of the magnetic fields generated by the two adjacent second coil windings 522 are opposite, the magnetic fields generated by the two adjacent second coil windings 522 are mutually extruded when being conducted in the magnetic conduction piece 53, so that the direction of the magnetic field in the magnetic conduction piece 53 is the NS direction in the magnetic conduction piece 53 shown in FIG. 7, the magnetic conduction piece 53 forms a radial convex magnetic pole, and the vibrator assembly 51 is subjected to upward suction force under the suction force of the magnetic conduction piece 53, so that the vibrator assembly 51 moves upward. In the lower half period of the power on, the current in the second coil winding 522 is commutated, the direction of the magnetic field in the magnetic conduction piece 53 is also changed, at this time, the vibrator assembly 51 is subjected to downward suction force under the suction force of the magnetic conduction piece 53, so that the vibrator assembly 51 moves downward, and then, by changing the direction of the current in the second coil winding 522, the vibrator assembly 51 can be driven to reciprocate along the axial direction of the first output shaft 21, so that the first output shaft 21 is driven to reciprocate along the axial direction of the first output shaft 21.

It should be further noted that, under the condition of maintaining the frequency of the reciprocating linear motion of the first output shaft 21 unchanged, the current of the second coil winding 522 can be adjusted by adjusting the duty ratio alone, so as to realize the requirement of the output force of the motor, greatly enhance the adjusting range, and increase the endurance of the battery.

As shown in fig. 2 and 8, in some embodiments of the present application, the motor further includes a limiting assembly 60 located in the accommodating cavity 11, the limiting assembly 60 is provided with at least one group, and the limiting assembly 60 includes a bearing 61, an elastic member 62, and a bearing 61 seat; the bearing 61 is sleeved on the first output shaft 21, the bearing 61 seat is arranged around the periphery of the bearing 61 and is connected with the shell 10, the elastic piece 62 is connected with the outer ring 611 of the bearing 61 and the bearing 61 seat, the bearing 61 follows the first output shaft 21, and when the bearing 61 seat moves along the axial direction of the first output shaft 21, the elastic piece 62 elastically deforms along the axial direction of the first output shaft 21 so as to provide elastic restoring force for the first output shaft 21 when the first output shaft 21 moves along the axial direction of the first output shaft 21. The elastic member 62 may be made of elastic metal, elastic plastic or other elastic materials, and is not particularly limited in this application.

It should be noted that, when the first output shaft 21 performs a linear reciprocating motion along the axial direction of the first output shaft 21, the bearing 61 integrally performs a linear reciprocating motion along with the first output shaft 21, and the elastic member 62 may elastically deform, when the second driving mechanism 50 stops driving the first output shaft 21 to perform a linear motion, the elastic member 62 may perform a reset function, and under the effect of the reset force of the elastic member 62, the first output shaft 21 may be driven to move to a reset position along the axial direction of the first output shaft 21; in addition, when the first output shaft 21 rotates around the axis of the first output shaft 21, the inner ring 612 of the bearing 61 rotates synchronously with the first output shaft 21, at this time, the outer ring 611 of the bearing 61 and the bearing 61 seat do not rotate relatively, and the first output shaft 21 is not interfered by the elastic member 62 when rotating, so that the coupling of the rotation and the linear motion of the first output shaft 21 is smooth, and the first output shaft 21 can be prevented from moving and blocking.

Further, the elastic member 62 may be a spring, and the elastic member 62 is provided with an opening penetrating through the elastic member 62 along the axial direction of the first output shaft 21, so that the elastic member 62 is more easily elastically deformed along the axial direction of the first output shaft 21.

In a second aspect, based on the motor described above, the present application also provides an electric toothbrush, as shown in fig. 9, comprising a handle 70, a head 80, and a motor as in any of the above embodiments.

Wherein the brush handle 70 is provided with a containing cavity, the motor is arranged in the containing cavity, one end of the first output shaft 21 is arranged in the containing cavity, and the other end of the first output shaft penetrates out of the containing cavity and is positioned outside the brush handle 70; the brush head 80 is detachably connected to an end of the first output shaft 21 located outside the brush handle 70.

The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (18)

1. A motor, comprising:

a housing having a receiving cavity;

a first output shaft, part of which extends into the accommodating cavity;

the first driving mechanism is arranged in the accommodating cavity and connected with the shell, and is used for driving the first output shaft to rotate around the axis of the first output shaft; the method comprises the steps of,

An end cap assembly connected to an end of the housing, a portion of the first output shaft extending out of the receiving cavity and through the end cap assembly;

the end cover assembly comprises an elastic support and a connecting piece, the elastic support is connected with the shell, the first output shaft is connected with the elastic support through the connecting piece, and when the first output shaft rotates around the axis of the first output shaft, the connecting piece is driven to rotate, so that the elastic support is elastically deformed along the circumferential direction of the first output shaft, and elastic restoring force is provided for the first output shaft through the elastic support when the first output shaft rotates.

2. The motor of claim 1, wherein the elastic support extends along the outer circumference of the first output shaft, a notch is provided on the elastic support, the notch penetrates through the inner side and the outer side of the elastic support, and the notch extends along the axial direction of the first output shaft to penetrate through the two ends of the elastic support;

the two sides of the notch are respectively a first end and a second end of the elastic support, the first end of the elastic support is connected with the shell, and the second end of the elastic support is connected with the connecting piece.

3. The motor of claim 1, wherein the end cap assembly further comprises:

the elastic support is connected with the shell through the connecting support.

4. A motor according to claim 3, wherein the elastic support and the housing are arranged at intervals in the axial direction of the first output shaft, and a gap is provided between the elastic support and the connecting support in the axial direction of the first output shaft.

5. A motor as claimed in claim 3, wherein the end of the housing is provided with an opening communicating with the receiving chamber, a portion of the connection bracket being located at the opening, the connection bracket being openable and sealable to the opening, the first output shaft passing through the connection bracket.

6. The motor according to claim 1, wherein a through hole extending in an axial direction of the first output shaft is provided in the connection member, the first output shaft passing through the through hole to pass through the connection member;

the elastic support extends along the periphery of the connecting piece, and the connecting piece is connected with the inner side of the elastic support.

7. The motor of claim 1, wherein the connector is massive to increase the moment of inertia of the first output shaft.

8. The motor of claim 1, wherein the connection is asymmetric about an axis of the first output shaft.

9. The motor of claim 1, wherein the end cap assembly further comprises:

the stop limiting structure is connected with the shell and is positioned on the rotating path of the connecting piece, and when the connecting piece rotates to a preset position along with the first output shaft, the stop limiting structure is abutted with the connecting piece so as to prevent the connecting piece from rotating.

10. The motor of claim 9, wherein the end cap assembly further comprises a connection bracket, the elastic bracket extends along the outer circumference of the first output shaft, a notch is provided on the elastic bracket, the notch penetrates through the inner side and the outer side of the elastic bracket, and the notch extends along the axial direction of the first output shaft to penetrate through the two ends of the elastic bracket;

the two sides of the notch are respectively a first end and a second end of the elastic support, the first end of the elastic support is connected with the shell, the second end of the elastic support is connected with the shell through the connecting support, and the part of the connecting support extends to the inner side of the elastic support through the notch so as to form the stop limiting structure.

11. The motor of claim 1, wherein the first drive mechanism comprises:

the first magnet is sleeved on the first output shaft and is connected with the first output shaft;

the first stator assembly comprises a first coil bracket and a first coil winding, the first coil bracket is arranged around the periphery of the first magnet and is connected with the shell, and the first coil winding is wound on the first coil bracket;

when the first coil winding is electrified, the first magnet is driven to drive the first output shaft to rotate around the axis of the first output shaft.

12. The motor of claim 1, further comprising:

the second output shaft is positioned in the accommodating cavity, and the axial direction of the second output shaft is the same as the axial direction of the first output shaft;

the second driving mechanism is arranged in the accommodating cavity and connected with the shell, and is used for driving the second output shaft to move along the axial direction of the second output shaft so as to drive the first output shaft to move along the axial direction of the first output shaft.

13. The motor of claim 12, wherein an end of the first output shaft extending out of the accommodating cavity is an output end, the first driving mechanism and the second driving mechanism are arranged along an axial direction of the first output shaft, and the first driving mechanism is located at a side of the second driving mechanism close to the output end.

14. The motor of claim 12, wherein the first output shaft is integrally formed with the second output shaft.

15. The motor of claim 12, wherein the first output shaft forms a non-rotational fit with the connecting member such that the connecting member is rotatable with the first output shaft about an axis of the first output shaft, and wherein the first output shaft forms a sliding fit with the connecting member such that the first output shaft is movable relative to the connecting member in an axial direction of the first output shaft.

16. The motor of claim 15, wherein the connection member is provided with a through hole extending in an axial direction of the first output shaft, the first output shaft passing through the through hole to pass through the connection member;

the through hole is a non-circular hole, the first output shaft comprises a matching part positioned in the through hole, and the shape of the cross section of the matching part is matched with the shape of the through hole, so that the first output shaft and the connecting piece form non-rotary matching; the engagement portion is movable relative to the through hole in an axial direction of the first output shaft to form a sliding engagement between the first output shaft and the connecting member.

17. The motor of claim 12, wherein the second drive mechanism comprises:

the vibrator assembly is sleeved on the second output shaft and connected with the second output shaft, and the vibrator assembly is provided with a plurality of N-pole magnetic poles and S-pole magnetic poles which are alternately arranged along the axial direction of the second output shaft;

the second stator assembly comprises a second coil bracket and a plurality of second coil windings, the second coil bracket is arranged around the periphery of the vibrator assembly and is connected with the shell, the second coil windings are arranged on the second coil bracket and are arranged around the periphery of the second output shaft, and the second coil windings are arranged at intervals along the axial direction of the second output shaft;

the magnetic conduction piece is positioned between two adjacent second coil windings, is arranged on the second coil bracket and extends around the periphery of the second output shaft;

when the second coil windings are not electrified, each magnetic conduction piece corresponds to the junction of the N pole magnetic pole and the S pole magnetic pole, and when the second coil windings are electrified, the current flow directions of the adjacent two second coil windings are opposite so as to drive the vibrator assembly and the second output shaft to reciprocate along the axial direction of the second output shaft.

18. An electric toothbrush comprising a handle, a head and a motor as claimed in any one of claims 1 to 17;

the brush handle is provided with a containing cavity, the motor is arranged in the containing cavity, one end of the first output shaft is arranged in the containing cavity, and the other end of the first output shaft penetrates out of the containing cavity and is positioned outside the brush handle; the brush head is detachably connected with one end of the first output shaft, which is positioned outside the brush handle.