CN213521619U

CN213521619U - Electric toothbrush motor

Info

Publication number: CN213521619U
Application number: CN202022757612.9U
Authority: CN
Inventors: 刘龙波; 张富平; 陈诚; 李政林; 石广全; 王乐; 陈华信
Original assignee: A BETTER ELECTRICAL MANUFACTURING (SHENZHEN) CO LTD
Current assignee: A BETTER ELECTRICAL MANUFACTURING (SHENZHEN) CO LTD
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-06-22
Anticipated expiration: 2030-11-25

Abstract

The application provides an electric toothbrush motor, which comprises a shell, a stator, a rotor, a front end cover and a rear end cover, wherein the stator and the rotor are positioned in the shell, the front end cover and the rear end cover are positioned at two opposite ends of the shell, the rotor comprises a rotor core and a rotating shaft, the middle part of the rotor core is provided with a shaft hole, one end of the rotating shaft penetrates into the shaft hole and is fixed with the rotor core, the rear end cover is integrally formed and comprises a first base plate and an elastic sheet protruding towards the front end cover, and the top end, far away from the first base plate, of the elastic sheet penetrates into the; in this application, because of integrated into one piece's rear end cap's shell fragment and rotor fixed connection, it is relative at the rotor during the stator horizontal hunting, the shell fragment can the elasticity tractive the rotor controls it and makes its quick reset at certain angle within range swing, so, has just made to have utilized the electric toothbrush's of motor user has better user experience.

Description

Electric toothbrush motor

Technical Field

The application relates to the field of electric toothbrushes, in particular to an electric toothbrush motor.

Background

Electric toothbrushes are popular because they are more effective at removing plaque, reducing gingivitis and bleeding than conventional toothbrushes. A common electric toothbrush in the market is electrified to drive an eccentric cam, and the rotation of the cam enables a swing arm to swing back and forth, so that gears on the same shaft swing back and forth, and a brush head is driven to achieve the purpose of brushing teeth. The electric toothbrush head arranged in this way has large mechanical vibration to teeth, causing discomfort to users.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides an electric toothbrush motor, including casing, the stator that is located the casing, rotor and be located casing relative both ends front end housing and rear end cap, the rotor includes that the middle part sets up the rotor core in shaft hole and one end wears to penetrate in the shaft hole and with the fixed pivot of rotor core, rear end cap integrated into one piece, including first base plate and towards the shell fragment of front end cap projection, the top that the shell fragment kept away from first base plate penetrates the shaft hole and with shaft hole in pivot fixed connection.

In some embodiments, the rotating shaft is provided with a connecting groove towards the top end of the elastic sheet, and the top end of the elastic sheet is inserted into the connecting groove.

In some embodiments, the rear end cap further includes a cover protruding from a side surface thereof, the cover is a hollow tube, a distal end of the cover away from the first substrate is closed, a portion of the first substrate corresponding to the cover is provided with an opening, and the resilient piece protrudes from a middle portion of the distal end of the cover away from the first substrate toward the front end cap.

In some embodiments, the stator includes an insulating support and a stator winding wound on the insulating support, the rear end cover includes a first pressing member protruding from the first substrate toward the front end cover, the front end cover includes a second substrate and a second pressing member protruding from the second substrate toward the rear end cover, the first substrate and the second substrate are located at two opposite ends of the insulating support, and the first pressing member and the second pressing member respectively press one side of two opposite ends of the stator winding away from the insulating support.

Further, the first pressing part is a protruding sheet body, and a top end of the first pressing part facing the outer surface of the stator winding is formed with a first guide surface inclined inwards for guiding the first pressing part to press against the corresponding stator winding.

In some embodiments, the second pressing member is a protruding sheet body, and a top end of the protruding sheet body facing the outer surface of the stator winding is formed with a second guide surface inclined inward for guiding the second pressing member to press against the corresponding stator winding.

In some embodiments, two first lugs are protruded outwards from two opposite sides of the first substrate, the first substrate is accommodated in one end of the insulating support, the periphery of the first substrate abuts against the inner surface of the insulating support, a first positioning groove and a second positioning groove are formed in two opposite ends of the insulating support, and the two first lugs are accommodated in the first positioning groove and the second positioning groove at one end respectively.

Furthermore, two second lugs are extended outwards from the other two sides of the first substrate towards different directions, third positioning grooves are respectively formed in the two opposite ends of the insulating support, and the second lugs are respectively accommodated in the third positioning grooves in one end of the insulating support.

Furthermore, two third lugs protrude towards the rear end cover from two opposite sides of the inner surface of the second substrate facing the rear end cover, the second substrate abuts against the end portion of the insulating support, and the two third lugs are respectively accommodated in the first positioning groove and the second positioning groove at the other end of the insulating support.

Furthermore, two fourth lugs protrude towards the rear end cover from the other two sides of the inner surface of the second substrate, and the two fourth lugs are respectively accommodated in the third positioning groove at the other end of the insulating support.

In this application, because of integrated into one piece's rear end cap's shell fragment and rotor fixed connection, it is relative at the rotor during the stator horizontal hunting, the shell fragment can the elasticity tractive the rotor controls it and makes its quick reset at certain angle within range swing, so, has just made to have utilized the electric toothbrush's of motor user has better user experience.

Drawings

Fig. 1 is an assembled view of an electric toothbrush motor according to an embodiment of the present application.

Fig. 2 is an assembled view of the motor of the electric toothbrush of fig. 1 from another perspective.

Figure 3 is a combination drawing showing the electric toothbrush motor with the rear end cap removed.

Fig. 4 is an exploded view of the electric toothbrush motor shown in fig. 1.

Fig. 5 is an exploded view of the electric toothbrush motor shown in fig. 1 from another perspective.

Fig. 6 is a sectional view of the motor of the electric toothbrush shown in fig. 1.

Detailed Description

The present application will be described in detail with reference to the drawings and specific embodiments, so that the technical solutions and advantages thereof will be more clearly understood. It is to be understood that the drawings are provided solely for purposes of illustration and not limitation, and that the dimensions shown in the drawings are for clarity of description and are not to be taken as limiting the scale.

Referring to fig. 1 to 3, an electric toothbrush motor according to an embodiment of the present application includes a housing 10, a stator 20 and a rotor 30 inside the housing 10, and a front cover 40 and a rear cover 50 at opposite ends of the housing 10.

Referring to fig. 4 to 6, the stator 20 includes an insulating support 21 and a stator winding 23 accommodated in the insulating support 21. The insulating support 21 is a hollow tube, and includes a top plate 211, a bottom plate 213 and two side plates 215 connected to the top plate 211 and the bottom plate 213. The top plate 211 and the bottom plate 213 are square plate bodies, and the side plates 215 are arc plate bodies protruding outwards. Two fixing frames 217 protrude from the inner surfaces of the two side plates 215 opposite to each other. The two fixing frames 217 are spaced apart from each other, so that a space for accommodating the rotor 30 is formed in the middle of the insulating support 21. The stator windings 23 are respectively wound on the corresponding fixing frames 217. The fixed frame 217 is located at the middle of the corresponding side plate 215 and has a length smaller than that of the side plate 215. In this embodiment, the fixing frame 217 is a ring structure with a continuous closed periphery, and a receiving groove 2172 is formed in the middle. The side plate 215 is provided with a through hole corresponding to the receiving groove 2172, so that the through hole is communicated with the receiving groove 2172. It will be appreciated that in other embodiments, the fixture 217 may have other shapes, so long as it is capable of carrying the stator windings 23. The top plate 211 has a first U-shaped positioning groove 2112 formed in the middle of opposite ends thereof, the bottom plate 213 has a second U-shaped positioning groove 2132 formed in the middle of opposite ends thereof, and each side plate 215 has a third U-shaped positioning groove 2152 formed in opposite ends thereof. The length of the stator winding 23 is smaller than that of the insulating support 21, and after the stator winding is fixed on the fixing frame 217, two opposite ends of the stator winding are located in the insulating support 21.

The housing 10 is made of metal, and includes a main body 11 and supporting portions 13 protruding from two opposite sides of the main body 11, the main body 11 covers the middle portion of the outer side of the insulating support 21, so that two opposite ends of the insulating support 21 are exposed out of the housing 10, and the supporting portions 13 pass through the through holes and are received in the receiving slots 2172, so as to enhance the supporting strength of the fixing frame 217.

In this application, because of stator 20 passes through insulating support 21 cladding and supports stator winding 23 to stator winding 23 has carried out effectual insulation setting, thereby has improved stator 20's insulating properties, makes stator 20 have better uniformity, so be convenient for carry out batch production to stator 20's insulating support 21, reduce the labour, reduced manufacturing cost.

The rotor 30 includes a rotor core 31, a magnetic stripe 33, and a rotating shaft 35. The rotating shaft 35 includes a connecting section 351 and a fixing section 353 located at one end of the connecting section 351. The diameter of the fixing section 353 is smaller than that of the connecting section 351. Thus, a shoulder 355 is formed on one end surface of the connecting section 351 connected to the fixing section 353. The rotor core 31 has a shaft hole 312 along its length direction in the middle. The fixing portion 353 penetrates the shaft hole 312 and is fixedly connected to the rotor core 31. One end of the rotor core 31 facing the connecting section 351 abuts against the shoulder 355, and a connecting groove 3532 is formed at the top end of the fixing section 353 facing the rear end cover 50. The magnetic strips 33 are arranged on two pairs of two sides of the periphery of the rotor core 31, the magnetic strips 33 on the same side are the same in magnetism, and the magnetic strips 33 on the two pairs of two sides are opposite in magnetism. In this embodiment, the number of the magnetic strips 33 is four, and the magnetic strips are uniformly fixed on two opposite sides of the rotor core 31 close to the stator winding 23 with the polarity of N-S.

A stopper 60 is fixed to the connection section 351 of the rotation shaft 35 and fixes one end of the rotor core 31 to limit the position of the rotor core 31. In this embodiment, the limiting member 60 is a collar sleeved on the rotating shaft 35, two spaced fixing posts 61 protrude from the periphery of the limiting member toward the rotor core 31, and the fixing posts 61 are respectively embedded in the periphery of the rotor core 31 to fix the rotor core 31 on the limiting member 60.

A bearing 70 is received in the front end housing 40 and is sleeved on the connecting section 351 of the rotating shaft 35. The stopper 60 is located between the bearing 70 and the rotor core 31.

The rear end cap 50 is integrally formed by an elastic insulating material, and includes a first substrate 51, a first protrusion 52 and a second protrusion 53 protruding outward from the periphery of the first substrate 51, and a cover 54, a first pressing member 55 and a resilient tab 56 protruding from two opposite sides of the first substrate 51. The first substrate 51 is a substantially square sheet, the outer contour of which matches the shape of the end of the insulating support 21, and is adapted to be accommodated in one end of the insulating support 21, and the periphery of which abuts against the inner surface of the insulating support 21. The first substrate 51 has two sides in two directions and two arc sides, and the two first lugs 52 are formed by protruding from the middle of the two square sides in opposite directions, and are respectively accommodated in the first positioning groove 2112 and the second positioning groove 2132 of the insulating bracket 21 and elastically abut against the edges thereof. The two second lugs 53 are formed by extending from the middle of the arc-shaped edge in opposite directions, are accommodated in the third positioning groove 2152 of the insulating support 21, and elastically abut against the edge of the third positioning groove 2152. The first protrusion 52 is a direction protrusion, and two opposite side surfaces thereof are coplanar with two opposite side surfaces of the first substrate 51. The second lug 53 is a U-shaped projection with an open outer end, the outer surface of the U-shaped projection far away from the front end cover 40 is coplanar with the outer surface of the first base plate 51 far away from the front end cover 40, the inner surface of the U-shaped projection facing the front end cover 40 and the corresponding inner surface of the first base plate 51 connected with the inner surface are integrally recessed towards the outer surface of the first base plate 51, and the thickness of the part is smaller than that of the other parts. The first base plate 51 has a through hole 57 at an end thereof adjacent to the second lug 53 for passing a guide tube 80 protruding from the stator winding 23. The through-hole 57 communicates with the opening of the second lug 53.

The cover 54 is formed by protruding outward from the middle of the outer surface of the first substrate 51, and is a hollow square tube, the end of the hollow square tube away from the first substrate 51 is closed, a square opening is formed on the portion of the first substrate 51 corresponding to the cover 54, and the elastic piece 56 protrudes from the middle of the end of the cover 54 away from the first substrate 51 toward the front end cover 40. The top end of the spring 56 is inserted into the connecting groove 3532 of the fixed section 353 of the rotating shaft 35 and is fixedly connected with the fixed section 353. The number of the first pressing parts 55 is two, and two first pressing parts 55 are arranged at intervals and respectively protrude outwards from two opposite sides of the opening of the first substrate 51, and the extending direction of the first pressing parts is the same as that of the elastic pieces 56. The top end of each first pressing member 55 away from the first base plate 51 is used for pressing against one end of the corresponding stator winding 23 toward the inner surface of the other stator winding 23. The first pressing member 55 is a protruding sheet, and a top end of each first pressing member 55 facing the outer surface of the corresponding stator winding 23 is inclined inward to form a first guiding surface 551 for guiding the first pressing member 55 to press the corresponding stator winding 23. The first guide surface 551 and the side plate 215 of the insulating support 21 fix one end of the corresponding stator winding 23 therebetween.

The front end cover 40 is integrally made of an elastic insulating material, and includes a second substrate 41, a connecting portion 42 protruding from the second substrate 41, a third lug 43 and a fourth lug 44 formed on the second substrate 41, and a second pressing member 45 protruding from the second substrate 41. The second substrate 41 is a substantially directional sheet and has two pairs of square edges and an arc edge connecting the two square edges. The connecting portion 42 protrudes from the second substrate 41 toward the middle of the inner surface of the rear end cap 50, and has an outer contour matching the end shape of the insulating support 21, for being received in the other end of the insulating support 21 and having a periphery abutting against the inner surface of the insulating support 21. A bearing chamber 46 is formed in the middle of the second substrate 41 and the middle of the connecting portion 42 to receive the bearing 70 therein. The number of the second pressing pieces 45 is four, and the second pressing pieces are distributed at intervals on two opposite sides of the inner surface of the connecting part 42 facing the rear end cover 50. The second pressing member 45 on the side of the inner surface of the second base plate 41 is directed toward the top end of the rear end cover 50 for pressing against the inner surface of the other end of the corresponding stator winding 23. Each second pressing member 45 is a protruding sheet body, and a top end of the protruding sheet body facing the outer surface of the stator winding 23 is formed with a second guide surface 451 inclined inward for guiding the second pressing member 45 to press against the corresponding stator winding 23. The third lugs 43 are two in number, protrude outwards from the middle of the square edge of the connecting portion 42, and the outermost ends of the third lugs are coplanar with the square edge of the second substrate 41. The third lug 43 is a square projection, and the inner surface facing the rear end cap 50 is coplanar with the inner surface of the connecting portion 42. The number of the fourth lugs 44 is two, and the fourth lugs project outwards from the middle of the arc-shaped edge of the connecting part 42, and the outermost ends of the fourth lugs are coplanar with the arc-shaped edge of the second base plate 41. The fourth lug 44 is a generally square-shaped projection having an inner surface facing the rear end cap 50 coplanar with an inner surface of the connecting portion 42. When the front end cap 40 is engaged with the insulating holder 21, the connecting portion 42 is received in the insulating holder 21, the inner surface of the second substrate 41 abuts against the end of the insulating holder 21, the third protrusion 43 is received in the first positioning groove 2112 and the second positioning groove 2132, and the fourth protrusion 44 is received in the third positioning groove 2152.

The motor of the electric toothbrush is connected with a power supply through the conduit 80 to provide alternating current, so that the magnetic strip 33 is driven by magnetic force to drive the rotor 30 to swing left and right at high speed in the direction far away from or close to the stator winding 23, thereby driving the electric toothbrush to work. The elastic piece 56 is used for resetting the rotating shaft 35 and the rotor core 31 fixed on the rotating shaft 35.

The present application also provides an electric toothbrush having the motor as described above, since the motor can control the high frequency swing of the rotor 30 in the left and right directions.

In this application, because of integrated into one piece's rear end cap 50's shell fragment 56 and rotor 30 fixed connection, rotor 30 for during the stator 20 horizontal hunting, shell fragment 56 can the elasticity tractive rotor 30, control it and make its quick reset at certain angle within range swing, so, just made to have utilized the electric toothbrush's of motor user has better user experience.

The above description is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-listed embodiments, and any simple changes or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present disclosure fall within the protection scope of the present application.

Claims

1. The utility model provides an electric toothbrush motor, includes the casing, is located stator, rotor in the casing and is located the front end housing and the rear end cap at the relative both ends of casing, the rotor includes that rotor core and one end that the shaft hole was seted up at the middle part wear penetrate in the shaft hole and with the fixed pivot of rotor core, its characterized in that: the rear end cover is integrally formed and comprises a first base plate and an elastic sheet protruding towards the front end cover, and the top end, far away from the first base plate, of the elastic sheet penetrates into the shaft hole and is fixedly connected with a rotating shaft in the shaft hole.

2. The electric toothbrush motor of claim 1, wherein the rotation shaft has a connection groove opened toward a top end of the resilient plate, and the top end of the resilient plate is inserted into the connection groove.

3. The electric toothbrush motor as claimed in claim 1, wherein the rear cap further comprises a cap protruding from a side surface thereof, the cap is a hollow tube closed at a distal end thereof remote from the first base plate, the first base plate is provided with an opening at a portion thereof corresponding to the cap, and the resilient piece protrudes from a middle portion of the distal end of the cap remote from the first base plate toward the front cap.

4. The electric toothbrush motor according to claim 1, wherein the stator includes an insulating support and a stator winding wound on the insulating support, the rear end cap includes a first pressing member protruding from the first base plate toward the front end cap, the front end cap includes a second base plate and a second pressing member protruding from the second base plate toward the rear end cap, the first and second base plates are located at opposite ends of the insulating support, and the first and second pressing members respectively press opposite ends of the stator winding away from the insulating support.

5. The electric toothbrush motor according to claim 4, wherein the first pressing member is a protruding sheet body whose top end facing the outer surface of the stator winding is formed with a first guide surface inclined inward for guiding the first pressing member to press the corresponding stator winding.

6. The electric toothbrush motor according to claim 4, wherein the second pressing member is a protruding sheet body whose top end facing the outer surface of the stator winding is formed with a second guide surface inclined inward for guiding the second pressing member to press the corresponding stator winding.

7. The electric toothbrush motor according to claim 4, wherein two first protruding lugs protrude outwards from two opposite sides of the first base plate, the first base plate is received in one end of the insulating bracket, and the periphery of the first base plate abuts against the inner surface of the insulating bracket, the two opposite ends of the insulating bracket are respectively provided with a first positioning groove and a second positioning groove, and the two first protruding lugs are respectively received in the first positioning groove and the second positioning groove at one end.

8. The electric toothbrush motor of claim 7, wherein two second protruding lugs protrude outward from the other two sides of the first base plate in different directions, and the opposite ends of the insulating bracket are respectively provided with third positioning grooves, and the second protruding lugs are respectively received in the third positioning grooves of one end of the insulating bracket.

9. The electric toothbrush motor according to claim 8, wherein two third lugs protrude toward the rear end cap from opposite sides of an inner surface of the second base plate toward the rear end cap, the second base plate abuts against an end of the insulating holder, and the two third lugs are respectively received in the first positioning groove and the second positioning groove at the other end of the insulating holder.

10. The electric toothbrush motor according to claim 9, wherein two fourth lugs protrude from the other two sides of the inner surface of the second base plate toward the rear end cap, and the fourth lugs are respectively received in the third positioning grooves at the other end of the insulating holder.