CN214124978U - Electric toothbrush and motor thereof - Google Patents

Abstract

The utility model provides an electric toothbrush and motor thereof, includes the casing, is located stator, rotor in the casing and is located front end housing and the rear end cap at the relative both ends of casing, the stator include the insulation support and accept in stator winding in the insulation support, its characterized in that: the insulating support is a hollow pipe body, fixing frames matched with the stator winding are oppositely and convexly extended from the surfaces of two opposite sides of the hollow pipe body, the shell comprises a body and supporting parts oppositely and convexly extended from the two opposite sides of the body, the body covers the middle part of the outer side of the insulating support, so that the two opposite ends of the insulating support are exposed out of the shell, and the supporting parts respectively penetrate through the insulating support and are contained in the fixing frames to enhance the supporting strength of the fixing frames; the utility model discloses in, pass through the insulating support cladding and support stator winding because of the stator to carry out effectual insulation setting to stator winding, thereby improved the insulating properties of stator, made the stator have better uniformity.

Description

Electric toothbrush and motor thereof

Technical Field

The utility model relates to an electric toothbrush field, concretely relates to electric toothbrush and motor thereof.

Background

Electric toothbrushes are popular because they are more effective at removing plaque, reducing gingivitis and bleeding than conventional toothbrushes. A typical electric toothbrush on the market includes a motor and a brushhead which cooperates with the motor. The motor comprises a shell, a stator accommodated in the shell and a rotor matched with the stator. The stator usually comprises stator core, stator winding and base, and the insulating adoption of stator is artifical manual slot insulating paper, complex operation, extravagant man-hour.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an electric toothbrush motor, including the casing, be located the stator of casing, rotor and be located the front end housing and the rear end housing at the relative both ends of casing, the stator includes insulating support and accepts the stator winding in the insulating support, insulating support is hollow body, and the relative both sides surface of its opposite stretches out in opposite directions has with stator winding complex mount, the casing includes the body and from the relative both sides of body supporting part that stretches out in opposite directions, the outside middle part of body cladding insulating support makes the relative both ends of insulating support expose in the casing, the supporting part passes insulating support respectively and accept in the mount, is used for strengthening the support strength of mount.

In some examples, the fixing frame is located in the middle of the insulating support, and the length of the fixing frame is smaller than that of the insulating support.

Furthermore, the fixing frame is an annular structure with a continuous closed periphery, an accommodating groove is formed in the middle of the fixing frame, a through hole is formed in the position, corresponding to the accommodating groove, of the insulating support, and the supporting portion penetrates through the through hole and is accommodated in the accommodating groove.

In some embodiments, the rotor includes a rotor core having a shaft hole at a middle portion thereof, and a rotating shaft having one end penetrating into the shaft hole and fixed to the rotor core, the rear end cover includes a resilient piece protruding toward the front end cover, and one end of the resilient piece penetrates into the shaft hole and is fixedly connected to the rotating shaft in the shaft hole.

Furthermore, 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 rotor further includes magnetic stripes respectively disposed on two opposite sides of the rotor core, where the magnetic stripes on the same side have the same magnetism, and the magnetic stripes on two pairs of sides have opposite magnetism.

In some embodiments, the rotor further includes a limiting member fixed to the rotating shaft and receiving one end of the rotor core therein.

Furthermore, the device further comprises a bearing accommodated in the front end cover, and one end of the rotating shaft is matched with the bearing.

Further, the limiting piece is located between the bearing and the rotor core.

The utility model also provides an electric toothbrush, including as above the motor and with motor complex brush head.

The utility model discloses in, because of the stator passes through the insulating support cladding and supports stator winding to carry out effectual insulation setting to stator winding, thereby improved the insulating properties of stator, made the stator have better uniformity, be convenient for so carry out batch production to the insulating support of stator, reduce the labour, reduced manufacturing cost.

Drawings

Fig. 1 is a combination view of an electric toothbrush motor according to an embodiment of the present invention.

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 invention will be described in detail with reference to the accompanying drawings and specific embodiments, so that the technical solutions and the advantages thereof will be more clearly understood. It is to be understood that the drawings are provided for purposes of illustration and description only and are not intended as a definition of the limits of the invention, but the dimensions shown in the drawings are for convenience 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 invention includes a housing 10, a stator 20 and a rotor 30 disposed in the housing 10, and a front cover 40 and a rear cover 50 disposed 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.

The utility model discloses in, 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 the fixing section 353 of the rotor core 31 facing the top end of the rear end cover 50 is provided with a connecting groove 3532. 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 utility model also provides an electric toothbrush with as above motor, because the steerable rotor 30 left and right sides direction high frequency swing of motor.

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

The above description is only a preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above listed embodiments, any person skilled in the art can obviously obtain simple changes or equivalent substitutions of the technical solutions within the technical scope of the present invention.

Claims (10)

1. The utility model provides an electric toothbrush motor, includes the casing, is located stator, rotor in the casing and is located front end housing and the rear end cap at the relative both ends of casing, the stator include the insulating support and accept in stator winding in the insulating support, its characterized in that: the insulating support is a hollow pipe body, fixing frames matched with the stator winding are oppositely and convexly extended on the surfaces of two opposite sides of the hollow pipe body, the shell comprises a body and supporting parts oppositely and convexly extended from the two opposite sides of the body, the body covers the middle part of the outer side of the insulating support, so that the two opposite ends of the insulating support are exposed out of the shell, and the supporting parts respectively penetrate through the insulating support and are contained in the fixing frames to enhance the supporting strength of the fixing frames.

2. The electric toothbrush motor of claim 1, wherein the holder is located at a middle portion of the insulating support and has a length smaller than that of the insulating support.

3. The electric toothbrush motor of claim 2, wherein the holder has a ring-shaped structure with a continuous closed periphery, a receiving groove is formed in the middle of the holder, a through hole is formed in a position of the insulating holder corresponding to the receiving groove, and the supporting portion is received in the receiving groove through the through hole.

4. The electric toothbrush motor according to claim 1, wherein the rotor includes a rotor core having a shaft hole formed in a middle portion thereof and a rotating shaft having one end inserted into the shaft hole and fixed to the rotor core, the rear end cap includes a resilient piece protruding toward the front end cap, and one end of the resilient piece is inserted into the shaft hole and fixedly connected to the rotating shaft in the shaft hole.

5. The electric toothbrush motor of claim 4, wherein the shaft has a coupling groove formed at a top end thereof facing the resilient plate, and the top end of the resilient plate is inserted into the coupling groove.

6. The electric toothbrush motor of claim 4, wherein the rotor further comprises magnetic strips respectively disposed on opposite sides of the rotor core, the magnetic strips on the same side being of the same polarity, and the magnetic strips on two pairs of opposite sides being of opposite polarity.

7. The electric toothbrush motor according to claim 4, further comprising a stopper fixed to the rotating shaft and fixedly connected to one end of the rotor core.

8. The electric toothbrush motor of claim 7, further comprising a bearing received in the front end cap, wherein one end of the shaft is engaged with the bearing.

9. The electric toothbrush motor of claim 8, wherein the retaining member is located between the bearing and the rotor core.

10. An electric toothbrush, characterized in that it comprises a motor according to any one of claims 1-9 for cooperation with a brush head.

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