Toothbrush motor and electric toothbrush

Abstract

The utility model relates to the technical field of toothbrushes, and discloses a toothbrush motor and an electric toothbrush. The toothbrush motor includes: a holder; the stator assembly is mounted on the support; the rotor assembly is rotationally connected with the support and can be driven by the stator assembly to rotate, one end of the rotor assembly is arranged to be an output end used for being connected with a toothbrush head in the axial direction of the rotor assembly, and a connecting hole is formed in the end face of the output end and used for being fixedly connected with the toothbrush head in an inserted mode. And a clamping part clamped with the toothbrush head is arranged in the connecting hole. Due to the fact that the connecting hole is formed in the output end of the rotor assembly, the output end is arranged in the shell, the toothbrush head can be inserted and fixed, the output end does not need to protrude out of the shell to connect and fix the toothbrush head, and therefore the output end does not need to protrude out of the electric toothbrush. Therefore, the size of the electric toothbrush in the axial direction of the rotor assembly can be shortened, and the output end is prevented from damaging surrounding articles in the carrying process.

Description

TECHNICAL FIELD

[0001] The utility model relates to toothbrush technical field, concretely relates to toothbrush motor and electric toothbrush. BACKGROUND

[0002] With the development of science and technology and the improvement of people's living standards, personal care products are also constantly progressing, among which electric toothbrushes are favored by more and more consumers due to their efficient cleaning effect.

[0003] In the related art, the output shaft of the motor of the electric toothbrush usually protrudes outside the toothbrush shell. Such a design is mainly to facilitate users to replace different toothbrush heads to meet different needs of oral care. However, this design also brings some inconvenience.

[0004] Firstly, the output shaft of the motor increases the total length of the entire toothbrush, making the electric toothbrush not easy to carry when traveling or going out, especially when it needs to be put into the suitcase or handbag, its volume is particularly bulky. Secondly, the output shaft of the motor may cause damage to surrounding articles if placed improperly, such as scratching or bumping the surface of other precision electronic products, especially the screens of smart phones and tablets. SUMMARY

[0005] Therefore, the utility model provides a toothbrush motor and an electric toothbrush to solve or improve the problem that the output shaft of the motor causes the total length of the toothbrush to be relatively long.

[0006] In a first aspect, the utility model provides a toothbrush motor for connecting a toothbrush head, comprising:

[0007] a support;

[0008] a stator assembly mounted on the support;

[0009] a rotor assembly rotatably connected with the support and driven to rotate by the stator assembly, one end of the rotor assembly being provided as an output end for connecting the toothbrush head, an end face of the output end being provided with a connecting hole for plug-in fixing with the toothbrush head, and the connecting hole being provided with a clamping portion for clamping the toothbrush head.

[0010] In an optional embodiment, the clamping portion comprises a first clamping structure provided on the connecting hole wall, the first clamping structure being used for connecting with the toothbrush head and limiting cooperation with the toothbrush head in the circumferential direction of the rotor assembly;

[0011] And / or, the clamping part comprises a second clamping structure arranged on the wall of the connecting hole, and the second clamping structure is used for connecting with the toothbrush head and limiting the toothbrush head in the axial direction of the rotor assembly.

[0012] In an optional embodiment, the support has an accommodating cavity inside, the stator assembly is arranged in the accommodating cavity, and the support is provided with an output hole communicating with the accommodating cavity;

[0013] Part of the rotor assembly is arranged in the accommodating cavity, and the output end passes through the output hole and is arranged outside the accommodating cavity, or the rotor assembly is arranged in the accommodating cavity, and the toothbrush head is used for being inserted into the connecting hole through the output hole.

[0014] In an optional embodiment, the rotor assembly comprises a rotating shaft, the rotating shaft comprises a first shaft segment and a second shaft segment, and the first shaft segment and the second shaft segment are arranged and connected in the axial direction of the rotor assembly.

[0015] The first shaft segment is rotationally connected with the support, the second shaft segment is provided with the connecting hole on the end face away from the first shaft segment, and the diameter of the second shaft segment is greater than the diameter of the first shaft segment.

[0016] In an optional embodiment, the rotor assembly comprises a rotating shaft and a magnet assembly, the rotating shaft is rotationally connected with the support, and the magnet assembly is connected with the rotating shaft.

[0017] The stator assembly comprises an iron core and a coil, the iron core is connected with the support, and the coil is arranged around the iron core and is arranged opposite to the magnet assembly.

[0018] In an optional embodiment, the iron core is arranged in a sleeve structure, the sleeve structure is spaced and arranged outside the rotating shaft in the radial direction of the rotating shaft, the sleeve structure is provided with a protruding part on the surface facing the rotating shaft, and the coil is arranged around the corresponding protruding part.

[0019] In an optional embodiment, the coil and the magnet assembly are both arranged as at least two, the coil and the magnet assembly are arranged opposite to each other in one-to-one correspondence, the stator assembly further comprises a limiting piece, the limiting piece is arranged between two adjacent coils and is used for limiting the coils, and the limiting piece is connected with the iron core.

[0020] In an optional embodiment, the rotor assembly further comprises a mounting seat, the mounting seat is fixedly sleeved outside the rotating shaft, the mounting seat is provided with a mounting groove on the surface away from the rotating shaft, and the magnet assembly is arranged in the mounting groove.

[0021] In a second aspect, the utility model provides a kind of electric toothbrush, comprising:

[0022] Shell;

[0023] The toothbrush motor as described above, the output end of the toothbrush motor does not protrude from the shell.

[0024] In an alternative embodiment, the electric toothbrush further comprises a toothbrush head, the toothbrush head penetrates into the shell, and the toothbrush head is inserted into the connecting hole and is clamped with the clamping portion.

[0025] The toothbrush motor provided by the utility model has the connecting hole at the output end of the rotor assembly, so that the output end is arranged in the shell, the toothbrush head can be inserted and fixed without protruding from the shell to connect and fix the toothbrush head, so that the output end does not need to protrude from the electric toothbrush, thereby shortening the size of the electric toothbrush in the axial direction of the rotor assembly, improving the portability of the electric toothbrush, and avoiding damage to surrounding objects during carrying.

[0026] The electric toothbrush provided by the utility model comprises the toothbrush motor provided by the utility model, and therefore has all the advantages of the toothbrush motor. BRIEF DESCRIPTION OF DRAWINGS

[0027] To more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 It is the front view of the toothbrush motor provided in the embodiments of the utility model;

[0029] Figure 2 It is Figure 1 The A-A sectional view in the view shown;

[0030] Figure 3 It is Figure 2 The B-B sectional view in the view shown;

[0031] Figure 4 It is Figure 1 The axonometric view of the toothbrush motor shown;

[0032] Figure 5 It is the explosion structure diagram of the toothbrush motor provided in the embodiments of the utility model;

[0033] Figure 6 A structure schematic view of a rotor assembly provided in the embodiment of the utility model;

[0034] Figure 7 A structure schematic view of a stator assembly provided in the embodiment of the utility model;

[0035] Figure 8 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0036] Figure 9 A structure schematic view of an end cover provided in the embodiment of the utility model; Figure 8 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0037] Figure 10 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0038] Figure 11 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0039] Figure 12 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0040] Figure 13 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0041] Figure 14 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0042] Figure 15 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0043] Figure 16 A structure schematic view of an end cover provided in the embodiment of the utility model; Figure 15 A structure schematic view of an end cover provided in the embodiment of the utility model;

[0044] Explanation of reference signs:

[0045] 100, motor; 1, support; 101, casing; 102, end cover; 102a, cover body; 102b, plug-in part; 102c, limiting block; 102d, arc-shaped slot; 102e, first through slot; 102f, second through slot; 103, accommodating cavity; 104, output hole; 2, stator assembly; 201, core; 201a, protruding part; 202, coil; 203, limiting piece; 3, rotor assembly; 301, output end; 302, connecting hole; 303, first clamping structure; 304, second clamping structure; 305, rotating shaft; 305a, first shaft segment; 305b, second shaft segment; 306, magnet; 307, mounting seat; 307a, mounting groove; 4, bearing; 5, outer shell; 8, brush head; 801, first matching structure; 802, second matching structure; 803, rod body; 804, mandrel; 805, brush disc; 806, through slot; 807, second groove. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0047] In the related art, the motor of the electric toothbrush is installed in the toothbrush shell, and the output shaft of the motor protrudes outside the toothbrush shell, so as to facilitate the plug-in of the output shaft of the motor and the jack on the brush head. When the brush head is not used, the brush head can be pulled off the output shaft of the motor.

[0048] However, the output shaft of the motor protrudes outside the toothbrush shell, which increases the total length of the toothbrush, resulting in poor portability of the electric toothbrush. In addition, the output shaft of the motor is easy to cause damage to the surrounding articles during carrying the electric toothbrush.

[0049] In order to solve or improve the problem that the output shaft of the motor causes the total length of the toothbrush to be relatively long, the utility model embodiments provide a toothbrush motor and an electric toothbrush.

[0050] The toothbrush motor 100 provided in the embodiments of the utility model will be described below in combination with Figures 1 to 16

[0051] Specifically, the toothbrush motor 100 comprises a support 1, a stator assembly 2 and a rotor assembly 3.

[0052] ​The stator assembly 2 is mounted on the support 1, and specifically, the stator assembly 2 is fixedly mounted on the support 1, for example, the stator assembly 2 and the support 1 can be bonded or screwed.

[0053] The rotor assembly 3 is rotationally connected with the support 1, and the rotor assembly 3 can be driven to rotate by the stator assembly 2. Specifically, under the condition that the toothbrush motor 100 is powered, electromagnetic force is generated between the stator assembly 2 and the rotor assembly 3, so that the rotor assembly 3 rotates relative to the stator assembly 2.

[0054] Along the axial direction of the rotor assembly 3, one end of the rotor assembly 3 forms an output end 301 for connecting the toothbrush head 8. An end surface of the output end 301 is provided with a connecting hole 302, and the connecting hole 302 is used for plug-in fixing with the toothbrush head 8, that is, the toothbrush head 8 is placed in the connecting hole 302 and is in transmission connection with the rotor assembly 3. The connecting hole 302 is provided with a clamping portion for clamping the toothbrush head 8, and the connecting hole 302 is clamped with the toothbrush head 8 through the clamping portion, which can improve the connection strength of the toothbrush head 8 and the output end 301, reduce the risk of loosening or falling of the toothbrush head 8, and facilitate disassembly of the toothbrush head 8 and the output end 301.

[0055] In this embodiment, during use, as shown in Figures 15-16 , the toothbrush motor 100 can be arranged in the shell 5 of the electric toothbrush, and the output end 301 of the toothbrush motor 100 does not protrude out of the shell 5. When the toothbrush head 8 is installed, the toothbrush head 8 can be inserted into the shell 5 of the electric toothbrush, and the toothbrush head 8 is inserted into the connecting hole 302 of the output end 301 and is clamped and fixed with the clamping portion. During tooth cleaning, the rotor assembly 3 drives the toothbrush head 8 to rotate under the interaction of the stator assembly 2 and the rotor assembly 3, so as to clean the teeth.

[0056] In this way, since the connecting hole 302 is arranged on the output end 301 of the rotor assembly 3, the output end 301 is arranged in the shell 5, and the toothbrush head 8 can be plug-in fixed without the need to protrude the output end 301 out of the shell 5 to be connected and fixed with the toothbrush head 8, so that the output end 301 does not need to protrude out of the electric toothbrush, thereby shortening the size of the electric toothbrush in the axial direction of the rotor assembly 3, improving the portability of the electric toothbrush, and avoiding damage to surrounding objects during carrying of the output end 301.

[0057] As shown in Figure 4 and Figure 6 , in some embodiments of the utility model, the clamping portion includes a first clamping structure 303 arranged on the hole wall of the connecting hole 302.

[0058] The first clamping structure 303 is used for connecting with the toothbrush head 8 and limiting cooperation with the toothbrush head 8 in the circumferential direction of the rotor assembly 3.

[0059] In the embodiment, the first clamping structure 303 is arranged on the hole wall of the connecting hole 302, so that the toothbrush head 8 is limited in the circumferential direction of the rotor assembly 3, rotation of the toothbrush head 8 relative to the rotor assembly 3 is prevented, the toothbrush head 8 can stably rotate synchronously with the rotor assembly 3, and the cleaning effect of the toothbrush head 8 is ensured.

[0060] Alternatively, referring to Figure 4 and Figure 6 , the first clamping structure 303 is arranged as a protruding structure protruding from the hole wall of the connecting hole 302. Correspondingly, the toothbrush head 8 is provided with a recessed structure connected with the protruding structure.

[0061] For example, as shown in Figure 4 or Figure 6 , one end of the protruding structure close to the center of the connecting hole 302 is arranged as a flat surface. Correspondingly, the end of the toothbrush head 8 inserted into the connecting hole 302 is milled flat to form a flat surface, and the milled flat surface of the toothbrush head 8 abuts against the surface of the protruding structure close to the center of the connecting hole 302, so that the toothbrush head 8 is circumferentially positioned.

[0062] Of course, the first clamping structure 303 is not limited to being arranged as a protruding structure. For example, in other embodiments, the first clamping structure 303 can also be arranged as a clamping groove. Specifically, the clamping groove is arranged on the inner wall of the connecting hole 302 and extends along the axial direction of the connecting hole 302. The toothbrush head 8 can be provided with a protruding structure, and when the toothbrush head 8 is placed in the connecting hole 302, the protruding structure is inserted into the clamping groove.

[0063] In some embodiments of the utility model, the clamping part comprises a second clamping structure 304 arranged on the hole wall of the connecting hole 302.

[0064] The second clamping structure 304 is used for connecting with the toothbrush head 8 and limiting cooperation with the toothbrush head 8 in the axial direction of the rotor assembly 3.

[0065] In the embodiment, the second clamping structure 304 is arranged on the hole wall of the connecting hole 302, so that the toothbrush head 8 is limited in the axial direction of the rotor assembly 3, axial movement of the toothbrush head 8 relative to the rotor assembly 3 is prevented, the toothbrush head 8 is prevented from being pulled out of the connecting hole 302, and the stability of the connection between the toothbrush head 8 and the rotor assembly 3 is ensured.

[0066] Alternatively, referring to Figure 4 and Figure 6As shown, the second clamping structure 304 is provided as a groove extending along the circumference of the connecting hole 302. The position of the toothbrush head 8 corresponding to the groove can be provided with a buckle, and when the toothbrush head 8 is inserted into the connecting hole 302 in place, the buckle of the toothbrush head 8 is engaged with the groove, thereby limiting the toothbrush head 8 in the axial direction of the rotating assembly.

[0067] Of course, the second clamping structure 304 is not limited to being provided as a groove. For example, in other embodiments, the second clamping structure 304 can be provided as a buckle, and the position of the toothbrush head 8 corresponding to the buckle is provided with a groove.

[0068] Reference Figure 2 As shown, in some embodiments provided by the utility model, the support 1 has an accommodating cavity 103 inside, and the stator assembly 2 is arranged inside the accommodating cavity 103. For example, the stator assembly 2 is connected to the cavity wall of the accommodating cavity 103. The support 1 is provided with an output hole 104, and the output hole 104 is in communication with the accommodating cavity 103. For example, in the axial direction of the rotor assembly 3, the output hole 104 is coaxially arranged with the output end 301.

[0069] Part of the rotor assembly 3 is arranged inside the accommodating cavity 103, and the output end 301 passes through the output hole 104 and is arranged outside the accommodating cavity 103.

[0070] Reference Figure 2 As shown, by arranging the output end 301 outside the accommodating cavity 103, the diameter of the output end 301 can be adjusted according to the size of the toothbrush head 8, so that the size of the connecting hole 302 on the output end 301 can better adapt to the toothbrush head 8, thereby avoiding the need to adjust the size of the part of the rotor assembly 3 located inside the accommodating cavity 103, avoiding the change in the size of the part of the rotor assembly 3 located inside the accommodating cavity 103, thereby reducing the structural modification of the toothbrush motor 100 and reducing the design difficulty of the toothbrush motor 100.

[0071] Alternatively, the output end 301 can also not protrude out of the accommodating cavity 103. For example, in other embodiments not shown, the output end 301 is arranged inside the accommodating cavity 103. The toothbrush head 8 is used to pass through the output hole 104 and is inserted with the connecting hole 302, that is, the rotor assembly 3 can be completely arranged inside the accommodating cavity 103.

[0072] In this way, the output end 301 is arranged inside the accommodating cavity 103 and does not protrude from the support 1, thereby being able to shorten the axial size of the toothbrush motor 100, and further being able to further shorten the axial size of the electric toothbrush. In addition, the connecting hole 302 is arranged inside the accommodating cavity 103, so that the toothbrush head 8 can be inserted into the accommodating cavity 103 of the toothbrush motor 100 and inserted with the connecting hole 302, thereby making full use of the internal space of the toothbrush motor 100 and further shortening the axial size of the electric toothbrush.

[0073] In some embodiments of the utility model, the rotor assembly 3 comprises a rotating shaft 305.

[0074] The rotating shaft 305 comprises a first shaft section 305a and a second shaft section 305b, which are arranged along the axial direction of the rotor assembly 3 and connected. For example, the first shaft section 305a and the second shaft section 305b are arranged as a machined integral structure or a welded integral structure. Alternatively, the first shaft section 305a and the second shaft section 305b can also be connected by means of bonding, threaded connection or fastener connection.

[0075] The first shaft section 305a is rotatably connected to the support 1. The second shaft section 305b is provided with a connecting hole 302 on the end face away from the first shaft section 305a, that is, one end of the second shaft section 305b away from the first shaft section 305a forms the output end 301. The diameter of the second shaft section 305b is greater than that of the first shaft section 305a.

[0076] In this embodiment, by making the diameter of the second shaft section 305b greater than that of the first shaft section 305a, the diameter of the connecting hole 302 provided on the second shaft section 305b can be increased, so that the diameter of the connecting hole 302 is adapted to the diameter of the toothbrush head 8, thereby making the diameter of the toothbrush head 8 larger, avoiding the problem of insufficient rigidity of the toothbrush head 8 due to its being too thin.

[0077] In addition, by arranging the first shaft section 305a and the second shaft section 305b, only the size of the second shaft section 305b can be increased, and the diameter of the first shaft section 305a rotatably connected to the support 1 does not need to be increased, so that the size of the support 1 in the radial direction of the first shaft section 305a does not need to be increased, so that the radial size of the toothbrush motor 100 is more compact.

[0078] Optionally, the second shaft section 305b is arranged outside the accommodating cavity 103 of the support 1, one end of the first shaft section 305a passes through the output hole 104 and is connected to the second shaft section 305b, and the end of the first shaft section 305a away from the second shaft section 305b is arranged inside the accommodating cavity 103.

[0079] In some embodiments of the utility model, the support 1 comprises a casing 101 and an end cover 102.

[0080] The casing 101 is provided with the output hole 104 at one end thereof along the axial direction of the rotor assembly 3, and is provided with an opening at the other end thereof, and the inside of the casing 101 forms the accommodating cavity 103.

[0081] The end cover 102 is connected with the shell 101 and is used for closing the opening. For example, the end cover 102 is inserted with the shell 101, the shell 101 is provided with a flange at the edge of the opening, the flange is folded towards the inside of the opening, and the flange is abutted with the side of the end cover 102 away from the shell 101, so as to limit and fix the end cover 102, and prevent the end cover 102 from being separated from the shell 101. Of course, the end cover 102 can also be bonded with the shell 101 or connected through threaded fasteners.

[0082] In this way, the stator assembly 2 and the rotor assembly 3 can be installed after the shell 101, and then the shell 101 is closed by the end cover 102, so as to facilitate the assembly of the toothbrush motor 100.

[0083] Optionally, the toothbrush motor 100 further comprises a bearing 4. The shell 101 away from the end cover 102 and the end cover 102 are both provided with the bearing 4, and the two ends of the rotating shaft 305 are respectively inserted with the inner rings of the bearings 4 on the shell 101 and the end cover 102.

[0084] Optionally, as shown in Figure 8 and Figure 9 In some embodiments of the utility model, the end cover 102 comprises a cover body 102a and an insertion part 102b.

[0085] Wherein, along the radial direction of the rotor assembly 3, both ends of the cover body 102a are provided with a first through slot 102e and a second through slot 102f.

[0086] The first through slot 102e extends along the radial direction of the rotor assembly 3 and penetrates the side wall of the cover body 102a along the radial direction of the rotor assembly 3. For example Figure 9 As shown in the drawing, the top end of the first through slot 102e at the top of the cover body 102a penetrates the upper side wall of the cover body 102a, and the bottom end of the first through slot 102e at the bottom of the cover body 102a penetrates the lower side wall of the cover body 102a.

[0087] The second through slot 102f is arranged at one end of the first through slot 102e close to the center of the cover body 102a, and the second through slot 102f intersects and communicates with the first through slot 102e. Along the axial direction of the rotor assembly 3, the first through slot 102e and the second through slot 102f both penetrate the cover body 102a.

[0088] The number of the insertion part 102b is two. Both of the two insertion parts 102b are connected to the surface of the cover body 102a close to the shell 101, and the two insertion parts 102b are respectively arranged on both sides of the line connecting the two first through slots 102e. The two insertion parts 102b have a spacing therebetween.

[0089] In the embodiment, when the end cover 102 is installed on the shell 101, the two insertion portions 102b are inserted into the shell 101 through the openings of the shell 101, and the cover body 102a abuts against the end surface of the shell 101 to close the openings.

[0090] In addition, by arranging the intersecting first through grooves 102e and second through grooves 102f at two ends of the end cover 102, and distributing the two insertion portions 102b on two sides of the line connecting the two first through grooves 102e, the first through grooves 102e and the second through grooves 102f provide more elastic deformation space for the cover body 102a in structure, and when the two insertion portions 102b are pressed during the insertion into the shell 101, the cover body 102a can be deformed through the first through grooves 102e and the second through grooves 102f to make the insertion portions 102b close to each other to adapt to the space limitation in the shell 101, thereby reducing the difficulty of inserting the end cover 102 into the shell 101, and making the insertion portions 102b abut against the inner wall of the shell 101 after being inserted into the shell 101.

[0091] Further, the surfaces of the two insertion portions 102b close to each other are provided with limiting blocks 102c, and the surfaces of the two limiting blocks 102c close to each other are provided with arc-shaped grooves 102d. The bearing 4 is arranged between the two limiting blocks 102c, and the outer circumferential surface of the bearing 4 is fitted with the two arc-shaped grooves 102d. In this way, the insertion portions 102b can be inserted and fixed with the shell 101, and the bearing 4 can be installed and fixed.

[0092] In some embodiments of the utility model, the rotor assembly 3 comprises a rotating shaft 305 and a magnet assembly.

[0093] The rotating shaft 305 is rotatably connected with the support 1, for example, the rotating shaft 305 is rotatably connected with the support 1 through the bearing 4. The magnet assembly is connected with the rotating shaft 305, for example, the magnet assembly can be connected with the rotating shaft 305 through adhesion or clamping.

[0094] Correspondingly, the stator assembly 2 comprises an iron core 201 and a coil 202.

[0095] The iron core 201 is connected with the support 1, and the iron core 201 is connected with the support 1 through adhesion or a threaded fastener. The coil 202 is arranged on the iron core 201 and is arranged opposite to the magnet assembly.

[0096] In this embodiment, by mounting the magnet assembly on the rotating shaft 305 and mounting the iron core 201 and coil 202 on the support 1, during use, a current is passed through the coil 202, and the magnet assembly drives the rotating shaft 305 to rotate under the action of the magnetic field generated by the coil 202. By adjusting the magnitude and direction of the current in the coil 202, the driving force on the magnet assembly and the rotation speed and direction of the rotating shaft 305 can be easily controlled.

[0097] With this configuration, since coil 202 is not mounted on shaft 305, meaning coil 202 remains stationary and does not rotate, a commutator is unnecessary. This simplifies the motor's structure, making it more compact. Furthermore, eliminating the commutator reduces potential failure points and lowers noise and vibration.

[0098] refer to Figure 3 and Figure 5 As shown, in some embodiments of this invention, the magnet assembly includes two magnets 306, which are arranged circumferentially along the rotation axis 305, with a gap between them. In the magnet assembly, the magnetic field directions of the two magnets 306 are respectively towards and away from the rotation axis 305. The coil 202 is disposed opposite to the magnet assembly.

[0099] In this embodiment, when a first current is passed through the coil 202, a first magnetic field is generated in the coil 202. The magnet 306 in the magnet assembly that is in the same direction as the first magnetic field is attracted and tends to move closer to the magnet 306, while the magnet 306 that is in the opposite direction to the first magnetic field is repelled and tends to move away from the magnet 306, thereby causing the rotating shaft 305 to rotate in the first rotation direction.

[0100] When a second current is applied to coil 202, a second magnetic field is generated within coil 202. Magnets 306 in the magnet assembly, whose direction is the same as the second magnetic field, are attracted and tend to move closer to each other, while magnets 306 in the opposite direction to the second magnetic field are repelled and tend to move away from each other. This causes the rotating shaft 305 to rotate in the second rotation direction. The first current and the second current have opposite current directions, and the first rotation direction and the second rotation direction have opposite rotation directions.

[0101] With this configuration, by changing the direction of the current in the coil 202, the toothbrush motor 100 can be made to reciprocate, so that the toothbrush motor 100 can drive the toothbrush head 8 to swing back and forth, thereby cleaning the teeth.

[0102] Furthermore, the number of magnet assemblies is at least two, and the at least two magnet assemblies are arranged circumferentially along the rotation axis 305. For example... Figure 3 The example shown is a configuration with two magnet components.

[0103] Each magnet assembly comprises two magnets 306, and the coil 202 corresponds to the magnet assembly one by one, and the coil 202 is arranged opposite to the corresponding magnet assembly.

[0104] In the embodiment, by arranging at least two magnet assemblies, on the one hand, the output torque of the toothbrush motor 100 can be increased, so as to improve the cleaning effect of the electric toothbrush, and on the other hand, the circumferential force of the rotating shaft 305 is balanced, the noise and abnormal sound are reduced, the damage probability of the toothbrush motor 100 is reduced, and the service life of the toothbrush motor 100 is prolonged.

[0105] Referring to Figure 3 , Figure 5 and Figure 7 , in some embodiments of the utility model, the iron core 201 is arranged as a sleeve structure.

[0106] Along the radial direction of the rotating shaft 305, the sleeve structure is arranged on the outside of the rotating shaft 305 in a sleeved manner. The surface of the sleeve structure facing the rotating shaft 305 is provided with a protruding part 201a, and the coil 202 is arranged on the protruding part 201a. For example, when the coil 202 is multiple, the protruding part 201a corresponds to the coil 202 one by one, and the coil 202 is arranged on the corresponding protruding part 201a.

[0107] In the embodiment, the protruding part 201a can more accurately guide the magnetic force line, reduce the magnetic leakage, that is, better concentrate the magnetic field, so that the magnetic force line is more concentrated around the coil 202, thereby improving the magnetic flux density and enhancing the working efficiency of the motor. In addition, the protruding part 201a can be used to fix and position the coil 202, improve the connection strength between the coil 202 and the iron core 201, and avoid the coil 202 from loosening.

[0108] By arranging the iron core 201 as a sleeve structure, on the one hand, the closed magnetic circuit can be better formed, the magnetic leakage is reduced, the magnetic flux density is improved, and on the other hand, the sleeve structure itself has good mechanical strength and can withstand high mechanical stress and vibration, thereby prolonging the service life of the motor. Finally, the sleeve structure is sleeved on the outside of the magnet assembly, so that even if the magnet assembly is separated from the rotating shaft 305, the sleeve structure can limit the magnet assembly and prevent the magnet assembly from escaping from the sleeve structure.

[0109] Referring to Figure 3 , Figure 5 and Figure 7 , in some embodiments of the utility model, the coil 202 and the magnet assembly are arranged as at least two, and the coil 202 and the magnet assembly are arranged opposite one by one. The stator assembly 2 further comprises a limiting piece 203.

[0110] The limiting member 203 is arranged between two adjacent coils 202 and is used for limiting the coils 202. The limiting member 203 is connected with the iron core 201. Optionally, the limiting member 203 is connected with the cylinder wall of the sleeve structure.

[0111] In the embodiment, by arranging the limiting member 203 between two adjacent coils 202, on the one hand, the coils 202 can be kept in the correct position, preventing the coils 202 from being displaced, and ensuring the stability of the coils 202. On the other hand, the coils 202 can be prevented from contacting each other and causing short circuit.

[0112] Optionally, the limiting member 203 can be bonded with the cylinder wall of the sleeve structure.

[0113] Reference Figure 3 、 Figure 5 and Figure 6 As shown in the figures, in some embodiments of the utility model, the rotor assembly 3 further comprises a mounting seat 307.

[0114] The mounting seat 307 is fixedly sleeved on the outer side of the rotating shaft 305, and the surface of the mounting seat 307 away from the rotating shaft 305 is provided with a mounting groove 307a. The magnet assembly is arranged in the mounting groove 307a. Specifically, the mounting groove 307a corresponds to the magnet 306 one by one, and the magnet 306 is arranged in the corresponding mounting groove 307a.

[0115] In the embodiment, by arranging the mounting seat 307 and the mounting groove 307a on the mounting seat 307, the magnet 306 can be conveniently installed and fixed.

[0116] Optionally, the magnet 306 can be bonded with the inner wall of the mounting groove 307a, so as to avoid the magnet 306 from being detached from the mounting groove 307a during rotation.

[0117] Optionally, the mounting seat 307 can be bonded with the rotating shaft 305, so as to avoid relative rotation between the mounting seat 307 and the rotating shaft 305.

[0118] The utility model further provides an electric toothbrush.

[0119] Specifically, the electric toothbrush comprises a housing 5 and a toothbrush motor 100 as described above.

[0120] The output end 301 of the toothbrush motor 100 does not protrude from the housing 5.

[0121] In the embodiment, the toothbrush motor 100 is arranged in the shell 5 of the electric toothbrush, and the output end 301 of the toothbrush motor 100 does not protrude out of the shell 5. When the toothbrush head 8 is installed, the toothbrush head 8 can be inserted into the shell 5 of the electric toothbrush and fixed by being inserted into the connecting hole 302 of the output end 301. During the tooth cleaning process, the rotor assembly 3 drives the toothbrush head 8 to rotate under the interaction of the stator assembly 2 and the rotor assembly 3, so as to clean the teeth.

[0122] In this way, since the connecting hole 302 is arranged at the output end 301 of the rotor assembly 3, the output end 301 is arranged in the shell 5, and the toothbrush head 8 can be fixed by being inserted, without the need of protruding out of the shell 5 to connect and fix the toothbrush head 8, so that the output end 301 does not need to protrude out of the electric toothbrush, thereby shortening the size of the electric toothbrush in the axial direction of the rotor assembly 3, improving the portability of the electric toothbrush, and avoiding damage to surrounding objects by the output end 301 during carrying.

[0123] In some embodiments provided by the utility model, the electric toothbrush further comprises a toothbrush head 8.

[0124] The toothbrush head 8 penetrates into the shell 5, and the toothbrush head 8 is inserted into the connecting hole 302 and is clamped with the clamping part.

[0125] In the embodiment, the toothbrush head 8 penetrates into the shell 5, is inserted into the connecting hole 302 of the output end 301, and is clamped with the clamping part in the connecting hole 302.

[0126] Reference Figures 10-13 As shown in the figure, in some embodiments provided by the utility model, the toothbrush head 8 is provided with a first matching structure 801, and the first clamping structure 303 is used for limiting the first matching structure 801 in the circumferential direction of the connecting hole 302.

[0127] In the embodiment, by arranging the first clamping structure 303 on the hole wall of the connecting hole 302, the toothbrush head 8 can be limited in the circumferential direction of the connecting hole 302, so as to prevent the toothbrush head 8 from rotating relative to the connecting hole 302, so that the toothbrush head 8 can stably rotate synchronously with the output end 301, and the cleaning effect of the toothbrush head 8 is ensured.

[0128] Reference Figure 4 and Figure 6 As shown in the figure, in some embodiments provided by the utility model, the first clamping structure 303 is a second protrusion arranged on the hole wall of the connecting hole 302. For example, one end of the second protrusion is connected with the hole bottom of the connecting hole 302, and the other end of the second protrusion extends to the hole opening of the connecting hole 302.

[0129] The toothbrush head 8 comprises a rod body 803 for mounting the brush disc 805, the rod body 803 is used for inserting the connecting hole 302. The first matching structure 801 is a first recess provided on the side wall of the rod body 803, and the first recess penetrates through the end face of the rod body 803 away from the brush disc 805. The second matching structure 802 is provided on the rod body 803.

[0130] In the embodiment, during the process of inserting the rod body 803 of the toothbrush head 8 into the connecting hole 302, the first recess on the rod body 803 is in abutment with the second protrusion on the hole wall of the connecting hole 302, so that the limiting cooperation in the circumferential direction of the connecting hole 302 is formed.

[0131] Optionally, as shown in Figure 4 or Figure 6 , one end of the second protrusion close to the center of the connecting hole 302 is provided as a flat surface, and correspondingly, the first recess can be formed by flattening the rod body 803, that is, the flattened part on the rod body 803 is in abutment with the surface of the second protrusion close to the center of the connecting hole 302, so that the circumferential positioning effect of the toothbrush head 8 is formed.

[0132] Referring to Figures 10-13 , in some embodiments provided by the utility model, the second matching structure 802 is provided on the toothbrush head 8, and the second clamping structure 304 is used for limiting the second matching structure 802 in the axial direction of the connecting hole 302.

[0133] In the embodiment, by providing the second clamping structure 304 on the hole wall of the connecting hole 302, the limiting of the toothbrush head 8 in the axial direction of the connecting hole 302 is formed, the axial movement of the toothbrush head 8 relative to the connecting hole 302 is prevented, the toothbrush head 8 is prevented from being pulled out of the connecting hole 302, and the stability of the connection between the toothbrush head 8 and the connecting hole 302 is ensured.

[0134] Referring to Figures 10-13 , in some embodiments provided by the utility model, the toothbrush head 8 comprises the rod body 803 and the mandrel 804.

[0135] The rod body 803 is a tubular structure, the rod body 803 is sleeved on the mandrel 804, and the rod body 803 is used for inserting the connecting hole 302. The rod body 803 is used for mounting the brush disc 805, for example, the brush disc 805 is provided with a tubular structure for inserting the rod body 803, the rod body 803 is arranged in the tubular structure and is clamped and matched with the tubular structure.

[0136] The second clamping structure 304 is a first recess, and the second matching structure 802 is a first protrusion provided on the surface of the rod body 803 away from the mandrel 804, and the first protrusion is used for clamping into the first recess. Similarly, the first matching structure 801 can also be provided on the rod body 803.

[0137] The rod body 803 is provided with at least two through grooves 806, the through grooves 806 penetrate the side wall of the rod body 803 along the wall thickness direction of the rod body 803, and the first protrusion is arranged between the adjacent two through grooves 806. The mandrel 804 is provided with a second groove 807 on the surface facing the first protrusion.

[0138] In the embodiment, when the toothbrush head 8 is installed, the rod body 803 is inserted into the connecting hole 302, and the first protrusion is clamped into the first groove.

[0139] By setting the rod body 803 as a pipe body structure, and arranging the first protrusion between the adjacent two through grooves 806, the rigidity of the material between the two through grooves 806 can be reduced, so that the material between the two through grooves 806 is more easily deformed in the radial direction of the rod body 803, so that the first protrusion can be displaced in the radial direction of the rod body 803, so as to facilitate the first protrusion to be clamped into or out of the first groove.

[0140] By inserting the mandrel 804 into the rod body 803, the rigidity of the whole rod body 803 can be improved, so that the rod body 803 can better transmit power between the motor 100 and the brush disc 805. By arranging the second groove 807 on the mandrel 804, the material between the two through grooves 806 can be avoided, so as to facilitate the displacement of the first protrusion.

[0141] Although the embodiments of the utility model are described in combination with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and changes all fall within the scope defined by the appended claims.

Claims

1. A toothbrush motor characterized by, A toothbrush head (8) connecting device comprises: a support (1); a stator assembly (2) mounted on the support (1); a rotor assembly (3) rotationally connected with the support (1) and driven to rotate by the stator assembly (2), one end of the rotor assembly (3) is provided as an output end (301) for connecting the toothbrush head (8), an end face of the output end (301) is provided with a connecting hole (302) for plug-in fixing with the toothbrush head (8), and a clamping portion for clamping with the toothbrush head (8) is arranged in the connecting hole (302).

2. The toothbrush motor of claim 1, wherein The clamping portion comprises a first clamping structure (303) arranged on the hole wall of the connecting hole (302), which is used for clamping with the toothbrush head (8) and limiting cooperation with the toothbrush head (8) in the circumferential direction of the rotor assembly (3); and / or, the clamping portion comprises a second clamping structure (304) arranged on the hole wall of the connecting hole (302), which is used for clamping with the toothbrush head (8) and limiting cooperation with the toothbrush head (8) in the axial direction of the rotor assembly (3).

3. The toothbrush motor of claim 1, wherein The support (1) has an accommodating cavity (103) in the interior, the stator assembly (2) is arranged in the accommodating cavity (103), and the support (1) is provided with an output hole (104) in communication with the accommodating cavity (103); wherein part of the rotor assembly (3) is arranged in the accommodating cavity (103), and the output end (301) passes through the output hole (104) and is arranged outside the accommodating cavity (103), or the rotor assembly (3) is arranged in the accommodating cavity (103), and the toothbrush head (8) is used for plug-in with the connecting hole (302) through the output hole (104).

4. The toothbrush motor of claim 1, wherein, The rotor assembly (3) comprises a rotating shaft (305), the rotating shaft (305) comprises a first shaft segment (305a) and a second shaft segment (305b), the first shaft segment (305a) and the second shaft segment (305b) are arranged and connected in the axial direction of the rotor assembly (3); wherein the first shaft segment (305a) is rotationally connected with the support (1), and the second shaft segment (305b) is provided with the connecting hole (302) on the end face away from the first shaft segment (305a), and the diameter of the second shaft segment (305b) is greater than that of the first shaft segment (305a).

5. The toothbrush motor according to any one of claims 1-4, wherein, The rotor assembly (3) comprises a rotating shaft (305) and a magnet assembly, the rotating shaft (305) is rotationally connected with the support (1), and the magnet assembly is connected with the rotating shaft (305); The stator assembly (2) comprises an iron core (201) and a coil (202), the iron core (201) is connected with the support (1), and the coil (202) is arranged on the iron core (201) and is arranged opposite to the magnet assembly.

6. The toothbrush motor of claim 5, wherein, The iron core (201) is arranged in a sleeve structure, which is spacedly sleeved on the outer side of the rotating shaft (305) along the radial direction of the rotating shaft (305), and the sleeve structure is provided with a protruding part (201a) on the surface thereof facing the rotating shaft (305), and the coil (202) is arranged on the corresponding protruding part (201a).

7. The toothbrush motor of claim 5, wherein The coil (202) and the magnet assembly are both arranged as at least two, the coil (202) and the magnet assembly are arranged in one-to-one correspondence, the stator assembly (2) further comprises a limiting piece (203), the limiting piece (203) is arranged between two adjacent coils (202) and is used for limiting the coil (202), and the limiting piece (203) is connected with the iron core (201).

8. The toothbrush motor of claim 5, wherein, The rotor assembly (3) further comprises a mounting seat (307), the mounting seat (307) is fixedly sleeved on the outer side of the rotating shaft (305), the mounting seat (307) is provided with a mounting groove (307a) on the surface thereof facing away from the rotating shaft (305), and the magnet assembly is arranged in the mounting groove (307a).

9. An electric toothbrush characterized by comprising: Comprising: a housing (5); The toothbrush motor (100) according to any one of claims 1-8, wherein the output end (301) of the toothbrush motor (100) does not protrude from the housing (5).

10. The electric toothbrush according to claim 9, wherein The electric toothbrush further comprises a toothbrush head (8), the toothbrush head (8) penetrates into the housing (5), and the toothbrush head (8) is inserted into the connecting hole (302) and is clamped with the clamping part.

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