WO2021128702A1

WO2021128702A1 - Electric motor assembly and electric toothbrush

Info

Publication number: WO2021128702A1
Application number: PCT/CN2020/089535
Authority: WO
Inventors: 赵立群; 胡新志; 陈建群
Original assignee: 广州星际悦动股份有限公司
Priority date: 2019-12-26
Filing date: 2020-05-11
Publication date: 2021-07-01
Also published as: CN113054818A

Abstract

The present disclosure discloses an electric motor assembly and an electric toothbrush, relating to the technical field of electric motor installation. the electric motor assembly comprises an installation bracket and a drive mechanism; the drive mechanism comprises a rotor, stator teeth, and a stator coil; the installation bracket is configured to be connected to the handle of the electric toothbrush; the installation bracket comprises an installation cover body and an installation main body; the installation main body is provided with a first accommodating space and a first installation opening which are in communication with each other; the installation cover body is disposed at a first installation opening, and together with the installation main body, holds the rotor in the first accommodating space; the rotor can rotate relative to the installation main body, and is configured to be connected to the brush head of the electric toothbrush; the stator coil is wound on the outer side of the installation main body; the stator teeth are connected to the installation main body, and pass through the stator coil and correspond to the rotor. The electric motor assembly and electric toothbrush have the feature of a relatively small overall volume.

Description

Motor assembly and electric toothbrush

Cross references to related applications

This disclosure claims the priority of a Chinese patent application named "Motor Assembly and Electric Toothbrush" filed with the Chinese Patent Office on December 26, 2019, with the application number 2019113742252, the entire content of which is incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the technical field of motor installation, and in particular to a motor assembly and an electric toothbrush.

Background technique

With the improvement of people's quality of life, more and more attention has been paid to oral health care, and more and more electric toothbrushes have entered family life. At present, the electric toothbrush drives the action of the brush head through the motor. The existing motor structure is that the motor is directly installed in the bracket after the motor is assembled. The motor is then wrapped by the bracket and then installed in the shell of the brush handle, which makes the whole machine of the electric toothbrush The volume is larger.

In view of this, it is particularly important to develop and design a motor assembly and electric toothbrush that can solve the above technical problems.

Summary of the invention

The purpose of the present disclosure includes, for example, to provide a motor assembly that has the characteristic of small overall volume.

Another object of the present disclosure includes, for example, to provide an electric toothbrush which has the characteristic of small overall volume.

The technical solutions of the embodiments of the present disclosure are implemented as follows:

In a first aspect, embodiments of the present disclosure provide a motor assembly, including a mounting bracket and a driving mechanism, the driving mechanism including a rotor, stator teeth, and stator coils; the mounting bracket is configured to be connected to the handle of an electric toothbrush, and the mounting bracket includes Install the cover and the installation main body, the installation main body is provided with a first accommodating space and a first installation opening that communicate with each other, the installation cover is arranged at the first installation opening, and together with the installation main body clamps the rotor in the first accommodating Space, the rotor can be rotated relative to the installation body, and is configured to be connected to the brush head of the electric toothbrush; the stator coil is wound on the outer surface of the installation body, and the stator teeth are connected to the installation body and pass through the stator coil and are connected to the rotor Corresponding.

Optionally, the first installation opening is configured to allow the rotor to pass through, so that the rotor can be installed into the first accommodating space through the first installation opening.

Optionally, the installation cover and the installation main body are detachably connected.

Optionally, one end of the mounting cover is a clamping end, the clamping end is clamped to the edge of the first mounting opening, and the other end of the mounting cover is detachably connected to the edge of the first mounting opening.

Optionally, the clamping end is configured to clamp the rotor together with the mounting body, the end surface of the clamping end is the clamping end surface, and the first clamping protrusion is protrudingly provided on the clamping end surface, and the first clamping protrusion is convexly provided There is a first clamping portion; the edge of the first installation opening is provided with a clamping gap communicating with the first accommodating space, the first clamping protrusion is located in the clamping gap, and the first clamping portion is located in the first accommodating space And hold against the wall surface of the first accommodating space to detachably clamp the clamping end to the installation main body.

Optionally, there is a clamping interval between the first clamping portion and the clamping end surface; a first clamping protrusion is protruded on the wall surface of the first accommodating space, and the first clamping protrusion is located in the clamping interval, And it resists the first clamping part and/or the clamping end surface.

Optionally, the wall surface of the first accommodating space is protrudingly provided with a second clamping protrusion, and the second clamping protrusion is farther away from the first installation opening than the first clamping protrusion; the first clamping portion and the second The clamping bump abuts.

Optionally, at least one of the second clamping protrusion and the first clamping portion is provided with a guiding inclined surface, and the guiding inclined surface is configured to guide the first clamping portion and the second clamping protrusion when they are close to each other The two sides in the radial direction of the rotor resist.

Optionally, one end of the installation cover is a clamping end, the clamping end is connected with the installation main body by screws, and the other end of the installation cover is engaged with the installation main body by a clamping structure.

Optionally, the rotor includes a rotating shaft, an iron core, a magnet and a shrapnel. The iron core is connected with the rotating shaft, the magnet is connected with the iron core, and the shrapnel is simultaneously clamped with the mounting cover and the mounting main body; the rotating shaft is rotationally matched with the mounting main body.

Optionally, at least one of the installation cover and the installation main body is provided with a clamping groove, and the elastic piece is engaged with the clamping groove.

Optionally, the clamping groove includes a first groove section and a second groove section that are connected, and the elastic piece is engaged with the first groove section; the groove width of the second groove section is in the direction from the first groove section to the second groove section The upper part gradually increases to guide the elastic piece from the second groove section into the first groove section. Optionally, the outer surface of the mounting body is protrudingly provided with a stator connection part, and a fixing hole is opened on the end of the stator connection part away from the mounting body, and the fixing hole is in communication with the first accommodating space; the stator coil is wound on the stator connection part, and the stator The teeth pass through the fixing holes.

Optionally, the number of stator teeth, stator coils, and stator connection parts are all two, and the two stator connection parts are symmetrically arranged on the outer surface of the mounting body; the stator tooth includes a tooth part and a yoke part, and the yoke part is arranged in a U shape, The tooth part penetrates the fixing hole and is connected with the middle part of the yoke part, and the two ends of the yoke part on one side of the mounting body are respectively connected with the two ends of the yoke part on the other side of the mounting body.

Optionally, a positioning fixing part is protrudingly provided on the stator connection part, and the positioning fixing part is matched with the yoke part; the fixing hole penetrates the positioning fixing part, and the stator coil is arranged between the stator fixing part and the installation body.

Optionally, one end of the mounting main body is the output end, and the output end is provided with an output opening. The mounting bracket further includes a sealing element. The sealing element is sleeved on the output end and is clamped to the output end; the rotor can partially extend from the output opening The first accommodating space passes through the sealing element to connect with the brush head.

Optionally, the motor assembly further includes a power supply, which is electrically connected to the stator coil; the installation body is also provided with a second accommodating space and a second installation opening that communicate with each other, and the second installation opening is located on the side of the installation body and can The power supply passes through, and the second accommodating space is configured to accommodate the power supply.

Optionally, the mounting main body is provided with a plurality of snap-fit elastic pieces, and the plurality of snap-fit elastic pieces work together to clamp the part of the power supply protruding out of the second accommodating space, thereby preventing the power supply from falling out of the second accommodating space from the second installation opening space.

Optionally, the second installation opening has two opposite sides, each side is provided with a plurality of snap-fit elastic pieces, and the plurality of snap-fit elastic pieces on the same side are arranged at intervals along the extending direction of the second installation opening.

In the second aspect, the embodiments of the present disclosure also provide an electric toothbrush, including a brush head, a brush handle, and a motor assembly; the motor assembly includes a mounting bracket and a driving mechanism, and the driving mechanism includes a rotor, stator teeth, and stator coils; mounting The bracket is configured to be connected to the handle of the electric toothbrush. The mounting bracket includes a mounting cover and a mounting body. The mounting body is provided with a first accommodating space and a first mounting opening that communicate with each other. The mounting cover is set at the first mounting The rotor is open and clamps the rotor in the first accommodating space together with the installation body. The rotor is rotatable relative to the installation body and is configured to be connected to the brush head of the electric toothbrush. The stator coil is wound on the outer surface of the installation body, and the stator teeth It is connected to the installation body and penetrates the stator coil and corresponds to the rotor.

Compared with the prior art, the motor assembly and the electric toothbrush provided by the embodiments of the present disclosure have beneficial effects relative to the prior art, including, for example:

The drive mechanism includes a rotor, stator teeth, and stator coils, and the mounting bracket is configured to be connected to the handle of the electric toothbrush. The mounting bracket includes a mounting cover and a mounting body. The mounting body is provided with a first accommodating space and a second housing. A mounting opening, and the first accommodating space is communicated with the first mounting opening, and the mounting cover is provided on the first mounting opening, and the rotor is clamped in the first accommodating space together with the mounting body, and the rotor can be Rotating relative to the installation body, the rotor is configured to be in driving connection with the brush head of the electric toothbrush. The stator coil is wound on the outer side surface of the mounting body, and the stator teeth are connected to the mounting body and pass through the stator coil and correspond to the rotor so as to drive the rotor to swing. In this way, the installation body is designed in such a way that the rotor, stator teeth and stator coils can be directly installed, eliminating the need for separate mounting brackets for the rotor, stator coils and stator teeth, reducing the size of the motor assembly and making it easier for users to hold Moreover, the installation method in which the cover body and the installation body clamp the rotor together makes the assembly of the rotor more flexible and convenient. Moreover, the structure of the motor is simplified, and noise can be reduced.

In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and understandable, preferred embodiments accompanied with accompanying drawings are described in detail as follows.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show certain embodiments of the present disclosure, and therefore should not be considered as limiting the scope. For those of ordinary skill in the art, without creative work, other related drawings can be obtained based on these drawings.

Fig. 1 is a schematic structural diagram of a motor assembly provided by an embodiment of the disclosure applied to an electric toothbrush.

FIG. 2 is a schematic diagram of the three-dimensional structure of the motor assembly provided by an embodiment of the disclosure when assembled.

FIG. 3 is a schematic diagram of an exploded structure of a motor assembly provided by an embodiment of the disclosure.

FIG. 4 is a schematic structural diagram of an installation main body provided by an embodiment of the disclosure;

FIG. 5 is a schematic diagram of a three-dimensional structure of the mounting cover of the motor assembly provided by an embodiment of the disclosure.

Fig. 6 is an enlarged schematic diagram of a partial structure at V in Fig. 3.

Fig. 7 is an enlarged schematic diagram of a partial structure at V I in Fig. 3.

FIG. 8 is an exploded view of the structure of the installation body, the installation cover and the rotor of another structure of the motor assembly provided by the embodiment of the disclosure.

Fig. 9 is an exploded schematic diagram of the structure of the motor assembly provided by an embodiment of the disclosure when only the stator teeth are separated.

FIG. 10 is a schematic diagram of the structure of the motor assembly provided by an embodiment of the disclosure when assembled.

Fig. 11 is a schematic cross-sectional structure diagram at A-A in Fig. 10.

Icon: 100-electric toothbrush; 20-brush head; 30-brush handle; 10-motor assembly; 12-mounting bracket; 121-mounting cover; 1211-second holding groove; 12111-first groove section; 12112 -Second Groove Section; 1212-Clamping End; 1213-Clamping End Face; 1214-First Clamping Protrusion; 1215-First Clamping Port; 1216-Guide Slope; 1217-Clamping Interval; 1218-Second Clamping protrusion; 123-installation body; 1231-first accommodating space; 12312-first installation opening; 12313-clamping gap; 12314-clamping opening; 12315-output opening; 12317-output terminal; 12316-connection Through hole; 1232-second accommodating space; 12321-second installation opening; 12322-clamping elastic sheet; 1233-first clamping groove; 1235-first clamping projection; 1236-second clamping projection; 1237-stator connecting part; 12371-fixing hole; 1239-stator fixing part; 1238-clamping block; 125-seal; 1251-seal part; 1252-card interface; 1253-seal connecting part; 13-drive mechanism; 131 -Rotor; 1312-rotating shaft; 1313-iron core; 1314-magnet; 1315-bearing; 1316-shrapnel; 132-stator teeth; 1321-tooth; 1322-yoke; 133-stator coil; 15-power supply.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the accompanying drawings herein may be arranged and designed in a variety of different configurations.

It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once a certain item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or when the product of the invention is used The orientation or positional relationship that is habitually placed, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation , It is constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present disclosure. The terms "first", "second", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. The terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements that are not explicitly listed. Elements, or also include elements inherent to such processes, methods, articles, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other same elements in the process, method, article, or equipment that includes the element.

It should also be noted that, unless otherwise clearly specified and limited, terms such as “set” and “connection” should be understood in a broad sense. For example, “connection” can be a fixed connection, a detachable connection, or an integral connection. ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood according to specific circumstances.

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a motor assembly 10 provided by an embodiment of the present disclosure applied to an electric toothbrush 100.

The embodiment of the present disclosure provides a motor assembly 10, which at least has the feature of a small overall volume. The motor assembly 10 can be applied to scenes that require vibration, such as an electric toothbrush 100, a hair removal device, a beauty device, a skin rejuvenation device, and a tooth cleaner. Of course, the motor assembly 10 can also be used independently.

Here, the motor assembly 10 is applied to an electric toothbrush 100 as an example for description. The electric toothbrush 100 includes the above-mentioned motor assembly 10 to provide the electric toothbrush 100 with a vibration power source through the motor assembly 10. Of course, the electric toothbrush 100 may also include a brush head 20 and a brush handle 30, and the motor assembly 10 is in a transmission connection with the brush head 20 to drive the brush head 20 to vibrate to complete the brushing action. The motor assembly 10 can be installed in the brush handle 30, and the brush head 20 can be movably connected with the brush handle 30.

Since the electric toothbrush 100 adopts the motor assembly 10 provided by the embodiment of the present disclosure, the electric toothbrush 100 also has at least the characteristic of a small overall volume.

The following will specifically introduce the structural composition, working principle and beneficial effects of the motor assembly 10 provided by the embodiments of the present disclosure.

Please refer to FIG. 2 and FIG. 3. FIG. 2 is a schematic diagram of the three-dimensional structure of the motor assembly 10 according to the embodiment of the present disclosure when assembled. FIG. 3 is a schematic diagram of an exploded structure of the motor assembly 10 provided by an embodiment of the disclosure.

The motor assembly 10 includes a mounting bracket 12 and a driving mechanism 13, and the driving mechanism 13 includes a rotor 131, stator teeth 132 and stator coils 133. The mounting bracket 12 is configured to be connected to the handle 30 of the electric toothbrush 100. The mounting bracket 12 includes a mounting cover 121 and a mounting body 123. The mounting body 123 is provided with a first accommodating space 1231 and a first mounting opening 12312. , And, the first accommodating space 1231 and the first installation opening 12312 are in communication; the installation cover 121 is disposed at the first installation opening 12312, and together with the installation body 123 clamps the rotor located in the first accommodating space 12312 131. The rotor 131 can rotate about its own axis relative to the mounting body 123, and the rotor 131 is configured to be in a transmission connection with the brush head 20 of the electric toothbrush 100, thereby driving the brush head 20 to vibrate. The stator coil 133 is wound around the outer surface of the mounting body 123, and the stator teeth 132 are connected to the mounting body 123, penetrate the stator coil 133, and correspond to the rotor 131 so as to drive the rotor 131 to swing.

In this way, the mounting body 123 is designed in such a way that the rotor 131, the stator teeth 132 and the stator coil 133 can be directly mounted, so as to eliminate the need for a separate mounting bracket for the rotor 131, the stator coil 133 and the stator teeth 132, and reduce the size of the motor assembly 10. The volume is convenient for the user to hold, and the installation method in which the rotor 131 is clamped by the installation cover 121 and the installation main body 123 together makes the assembly of the rotor 131 more flexible and convenient. Moreover, the structure of the motor is simplified, and noise can be reduced.

It should be noted that the motor part composed of the rotor 131, the stator coil 133 and the stator teeth 132 after being assembled by the above-mentioned installation structure can also have a larger diameter under the condition of the same size installation space compared with the existing structure. , In order to increase the torque of the electric toothbrush 100, or reduce the power consumption of the electric toothbrush 100.

Optionally, the mounting body 123 is arranged in a strip shape, and the first mounting opening 12312 is located on the side of the mounting body 123, and the first mounting opening 12312 can allow the rotor 131 to pass through, so that the rotor 131 can be installed by the first installation opening 12312. The opening 12312 is directly installed in the first accommodating space 1231. In this way, when assembling, the rotor 131 can be installed in the first accommodating space 1231 through the first installation opening 12312, and then the installation cover 121 is connected to the installation main body 123 at the first installation opening 12312 to complete The assembling of the rotor 131 is simple in assembling the rotor 131 on the side of the mounting main body 123, and the assembly efficiency is high.

It should be noted that the rotor 131 may include a rotating shaft 1312, an iron core 1313, a magnet 1314, a bearing 1315, and a shrapnel 1316. The magnet 1314 is installed on the iron core 1313, the iron core 1313 is installed on the rotating shaft 1312, and the bearing 1315 is sleeved on the outside of the rotating shaft 1312. . Among them, the iron core 1313 may be a ferromagnetic material, such as iron, nickel-cobalt, and alloys thereof. The mounting cover 121 and the mounting main body 123 clamp the rotating shaft 1312 together to connect the rotor 131 in the first accommodating space 1231, and make the rotating shaft 1312, the iron core 1313, and the magnet 1314 rotatable relative to the mounting main body 123. One end of the rotating shaft 1312 The output opening 12315 on the mounting main body 123 extends out of the first accommodating space 1231, and the other end is connected with an elastic piece 1316. The end of the elastic piece 1316 away from the rotating shaft 1312 can be clamped to the mounting main body 123 and the mounting cover 121 at the same time. In this way, during assembly, the rotating shaft 1312 can be inserted into the first accommodating space 1231 first, and then one end of the rotating shaft 1312 can be penetrated from the output opening 12315, so as to realize that the rotating shaft 1312 partially extends out of the first accommodating space 1231. , And clamp the end of the elastic piece 1316 away from the shaft 1312 to the mounting body 123, and then cover the mounting cover 121 to the first mounting opening 12312, so that the mounting cover 121 and the mounting body 123 clamp the bearing 1315 together, and make The mounting cover 121 and the mounting body 123 jointly hold the elastic sheet 1316 to complete the assembly of the rotor 131. Before or after this, the stator coil 133 and the stator teeth 132 can be assembled to the mounting body 123.

It should be noted that the rotating shaft 1312, the iron core 1313, the magnet 1314, the bearing 1315, and the elastic piece 1316 are all located in the first accommodating space 1231, and the end of the rotating shaft 1312 away from the elastic piece 1316 extends out of the first accommodating space 1231 from the output opening 12315. In order to connect with the brush head 20; the elastic sheet 1316 is snap-fitted with the mounting cover 121 and the mounting body 123 at the same time. After the mounting cover 121 and the mounting body 123 are connected, the bearing 1315 is clamped by the mounting cover 121 and the mounting body 123 together. The rotating shaft 1312, the iron core 1313, the magnet 1314, and the elastic piece 1316 as a whole are rotated and matched with the mounting body 123 through the bearing 1312, with low friction and more flexible rotation. It should be understood that the iron core 1313 and the magnet 1314 generate magnetic force when energized, which drives the rotating shaft 1312 to rotate relative to the mounting main body 123, so that the rotor 131 rotates relative to the mounting main body 123; since one end of the elastic piece 1316 is connected to the rotating shaft 1312, the other end is connected at the same time. Clamping with the mounting cover 121 and the mounting main body 123, the elastic piece 1316 is torsionally deformed by the rotation of the rotating shaft 1312, so that the elastic piece 1316 has the elastic force to restore the deformation. When the power supply is stopped, the rotor 131 stops rotating due to the loss of magnetic force. At this time, under the elastic force of the elastic piece 1316, the rotating shaft 1312, the iron core 1313 and the magnet 1314 are driven to spring back to the initial position, thereby driving the rotating shaft 1312 to connect to it. The brush head 20 vibrates. In addition, when the direction of the current changes, the direction of rotation of the rotor 131 changes accordingly.

Please continue to refer to Figures 2 to 4, the motor assembly 10 may further include a power source 15, which is electrically connected to the stator coil 133, and the installation body 123 may also be provided with a second accommodation space 1232 and a second installation opening 12321 which are connected to each other. , The second accommodating space 1232 and the first accommodating space 1231 are spaced apart in the extension direction of the mounting body 123, the second mounting opening 12321 is located on the side of the mounting body 123, optionally, the first mounting opening 12312 and the second mounting opening 12312 The installation opening 12321 is located on the same side of the installation main body 123. The second accommodating space 1232 is configured to accommodate the power supply 15, and the second installation opening 12321 can allow the power supply 15 to pass through, so that the power supply 15 can enter the second accommodating space through the second installation opening 12321. When assembling the mounting bracket 12 in the brush handle 30, the power supply 15 can be inserted into the second accommodating space 1232 through the second mounting opening 12321 first, and then the mounting bracket 12 is installed into the brush handle 30. The installation of the power supply 15 is more convenient.

Please continue to refer to FIG. 3, optionally, a plurality of snap-fit spring sheets 12322 can be provided on the mounting main body 123, a plurality of snap-fit spring sheets 12322 are respectively arranged on the edge of the second installation opening 12321, and the plurality of snap-fit spring sheets 12322 are configured to be common Clamp the power supply 15. When the power supply 15 is installed in the second accommodating space 1232, the power supply 15 squeezes a plurality of snap-fitting elastic pieces 12322. After the power supply 15 is squeezed into the second accommodating space 1232, the plurality of snap-fitting elastic pieces 12322 are pressed against The outer side surface, so that the power supply 15 is fixed in the second accommodating space 1232. Optionally, the second installation opening 12321 has two opposite sides, each side is provided with a plurality of snap-fit elastic pieces 12322, and the plurality of snap-fit elastic pieces 12322 on the same side are spaced apart along the extension direction of the installation body 123. Each side of the second installation opening 12321 is provided with a plurality of snap-fit elastic pieces 12322. After the power supply 15 is assembled into the second accommodating space 1232, the position is more firm and reliable. Escape from the set space 1232. At the same time, on the same side of the second installation opening 12321, a plurality of snap-fit spring pieces 12322 are spaced apart. In other words, in the extension direction of the installation main body 123, there is a space between two adjacent snap-fit spring pieces 12322. The shrapnel 12322 are set independently and do not affect each other; if one or several snap shrapnel 12322 are damaged, it will not affect the normal use of the other snap shrapnel 12322.

Optionally, the power supply 15 has a cylindrical shape; the snap-on spring pieces 12322 are all arc-shaped spring sheets, the snap-on spring pieces 12322 have an inner arc surface configured to fit with the outer peripheral surface of the power source 15, and the snap-on spring pieces 12322 fit closely with the power source 15. The contact area is large, the pressure applied to the power supply 15 by the clamping elastic piece 12322 is more uniform, it is not easy to cause the local pressure of the power supply 15 to be large or small, the power supply 15 is not easy to be damaged, and the clamping effect is good.

Please refer to FIG. 3 to FIG. 5. FIG. 5 is a three-dimensional structural diagram of the mounting cover 121 of the motor assembly 10 according to an embodiment of the present disclosure.

Optionally, a first clamping groove 1233 may be provided on the mounting main body 123, an end portion of the elastic piece 1316 away from the rotating shaft 1312 is clamped in the first clamping groove 1233, and an end of the mounting cover 121 may be provided with a first clamping groove 1233. A second clamping groove 1211 opposite to the clamping groove 1233, when the mounting cover 121 is disposed on the first installation opening 12312, another part of the end of the elastic piece 1316 away from the rotating shaft 1312 can also be clamped in the second clamping groove 1211 Inside. Optionally, when the installation cover 121 is arranged at the first installation opening 12312, the end surfaces of the first clamping groove 1233 and the second clamping groove 1211 where the notches are located are attached, thereby maximizing the clamping of the elastic sheet 1316 , The position of the elastic piece 1316 is more firm and reliable, and it is not easy to detach from the first clamping groove 1233 and the second clamping groove 1211.

It should be noted that the second clamping groove 1211 may be a groove whose caliber gradually expands in the direction along the groove bottom to the notch, or in other words, the opening part of the second clamping groove 1211 is provided with a wide mouth. In this way, when the installation cover 121 covers the first installation opening 12312, the elastic piece 1316 can be easily clamped in the second clamping groove 1211.

Optionally, the second holding groove 1211 includes a first groove section 12111 and a second groove section 12112 that are connected, the groove bottom of the first groove section 12111 is the groove bottom of the second holding groove 1211, and the second groove section 12112 has a groove bottom. The notch is the notch of the second clamping groove 1211. The width of the first groove section 12111 is substantially equal to the thickness of the elastic piece 1316, or slightly smaller than the thickness of the elastic piece 1316, so that the elastic piece 1316 and the first groove section 12111 are in an interference fit . The groove width of the second groove section 12112 gradually increases in the direction from the first groove section 12111 to the second groove section 12112, that is, the second groove section 12112 is arranged with a wide mouth. When the elastic piece 1316 is inserted into the second clamping groove 1211, it first enters from the notch of the second groove section 12112. Since the width of the groove of the second groove section 12112 is the largest, the elastic piece 1316 is not easy to interfere with the notch, which is convenient for entering , And then snap into the first groove section 12111 along the extending direction of the second groove section 12112. As the groove width of the second groove section 12112 gradually changes, the second groove section 12112 also has a guide spring 1316 that snaps into the first groove section 12111 As a result, the snapping operation of the elastic piece 1316 and the first groove section 12111 is convenient and smooth, and the two cooperate firmly.

Obviously, the structure of the first holding groove 1233 can be the same as the structure of the second holding groove 1211, and no detailed description is given here.

Please refer to FIG. 2, FIG. 6 and FIG. 7. FIG. 6 is an enlarged schematic diagram of the partial structure at V in FIG. 3. Fig. 7 is an enlarged schematic diagram of the partial structure at VI in Fig. 3.

Optionally, the manner of installing the cover 121 to cover the first installation opening 12312 may be: one end of the installation cover 121 is clamped with the edge of the first installation opening 12312, and the other end of the installation cover 121 is connected to the first installation opening 12312 The edge of the connector is detachably connected, and is detachably connected to the first installation opening 12312. During assembly, one end of the mounting cover 121 can be clamped to the edge of the first mounting opening 12312, and then the other end is connected to the edge of the first mounting opening 12312. The assembly method is simpler and faster.

Optionally, one end of the mounting cover 121 is a clamping end 1212, and the clamping end 1212 is an end that clamps the rotor 131 together with the mounting body 123, and the end surface of the clamping end 1212 is the clamping end surface 1213. A first clamping protrusion 1214 may be protrudingly provided on the clamping end surface 1213, and a first clamping portion 1215 may be protrudingly provided on the first clamping protrusion 1214.

Correspondingly, the edge of the first installation opening 12312 can be provided with a clamping notch 12313 communicating with the first accommodating space 1231. After the clamping end 1212 is clamped in the clamping notch 12313, the first clamping protrusion 1214 is located in the clamping The first clamping portion 1215 abuts against the inner wall of the first accommodating space 1231. In other words, the clamping notch 12313 can allow the first clamping protrusion 1214 and the first clamping portion 1215 to pass through, and When connecting the clamping end 1212 and the mounting body 123, the first clamping protrusion 1214 and the first clamping portion 1215 can be extended into the first accommodating space 1231 through the clamping notch 12313, and then the cover 121 can be turned over. So that the first clamping portion 1215 abuts against the wall surface of the first accommodating space 1231, and at the same time the clamping end 1212 and the mounting body 123 clamp the bearing 1315 together, thereby locking the position of the clamping end 1212 to ensure that the clamping end 1212 and The main body 123 is installed with a stable clamping bearing 1315.

It should be noted that the number of the first clamping portions 1215 can be two, and they are symmetrically arranged on the first clamping protrusions 1214, and the first clamping protrusions 1214 pass through the two first clamping portions 1215 at the same time. The inner wall of the first accommodating space 1231 resists, so as to improve the stability of the clamping end 1212 and the mounting main body 123 clamping the bearing 1315.

Optionally, a clamping interval 1217 may be left between the first clamping portion 1215 and the clamping end surface 1213. Correspondingly, a first clamping protrusion 1235 is protrudingly provided on the wall surface of the first accommodating space 1231, and When the clamping end 1212 is clamped in the clamping gap 12313, the first clamping protrusion 1235 is located in the clamping interval 1217, and the first clamping protrusion 1235 is on the two opposite sides of the mounting cover 121 in the extension direction Respectively resist the first clamping portion 1215 and the clamping end surface 1213 to limit the displacement of the clamping end 1212 in the clamping notch 12313 and further improve the stability of the clamping end 1212 and the mounting body 123 to clamp the bearing 1315. It should be noted that, optionally, the first clamping protrusion 1235 may also only resist the first clamping portion 1215 or the clamping end surface 1213.

It should be noted that one end of the mounting cover 121 can be detachably connected to the mounting main body 123 by screws.

Optionally, the length of the clamping gap 12313 may be greater than the length of the first clamping protrusion 1214, and the wall surface of the first accommodating space 1231 may also be protrudingly provided with a second clamping protrusion 1236. The connecting convex block 1236 is arranged close to the edge of the clamping gap 12313, and the second clamping convex block 1236 is located at the end of the clamping gap 12313 close to the first installation opening 12312. When the clamping end 1212 and the installation body 123 are clamped, the first The clamping portion 1215 can extend from the end of the clamping gap 12313 away from the first installation opening 12312 into the first accommodating space 1231, and follow the first clamping protrusion 1214 along the edge of the clamping gap 12313 to approach the first installation opening 12312 The first clamping portion 1215 abuts against the side of the second clamping protrusion 1236 close to the rotor 131, that is, the first clamping portion 1215 does not extend into the first installation opening 12312. Before being held against the inner wall of the first accommodating space 1231, the first mounting opening 12312 can be approached along the edge of the clamping notch 12313, and finally the first clamping portion 1215 is pressed against the second clamping protrusion 1236 and is close to the rotating shaft 1312 The clamping end 1212 is clamped to the mounting main body 123 by clamping the clamping end 1212.

It should be noted that a guiding inclined surface 1216 may be further provided on the side of the first clamping portion 1215 close to the clamping end 1212, and the guiding inclined surface 1216 extends to where the first clamping portion 1215 and the second clamping protrusion 1236 are located. The resisting side, in this way, the first clamping portion 1215 extends from the first mounting opening 12312 into the first accommodating space 1231, and is along the clamping notch 12313 toward the direction of the second clamping protrusion 1236 When moving, the guiding inclined surface 1216 first abuts against the second engaging protrusion 1236, and gradually slides to the side of the second engaging protrusion 1236 close to the shaft 1312, so that the first engaging portion 1215 is against the first engaging portion 1215. The two clamping protrusions 1236 are close to one side of the rotating shaft 1312.

Optionally, an inclined surface may be provided on the side of the second clamping protrusion 1236 away from the first mounting opening 12312, so as to guide the first clamping portion 1215 to approach the second clamping protrusion 1236 and to be connected to the second clamping protrusion 1236 Resist and cooperate.

Please refer to FIG. 8. FIG. 8 is an exploded view of the structure of the mounting body 123, the mounting cover 121 and the rotor 131 of another structure of the motor assembly 10 according to an embodiment of the present disclosure.

It should be noted that the installation cover 121 is also connected to the installation main body 123 in the following manner, and the clamping end 1212 and the installation main body 123 are detachably connected by connecting members such as screws. The end of the mounting cover 121 away from the clamping end 1212 is protrudingly provided with a second clamping protrusion 1218. A clamping opening 12314 can also be opened on the edge of the first mounting opening 12312, and the second clamping protrusion 1218 can be clamped. In the clamping opening 12314, the end of the mounting cover 121 away from the clamping end 1212 is connected to the mounting main body 123.

Please refer to FIG. 9. FIG. 9 is an exploded view of the structure of the motor assembly 10 provided by an embodiment of the disclosure when only the stator teeth 132 are separated.

Optionally, a stator connecting portion 1237 is protrudingly provided on the outer side of the mounting body 123, and a fixing hole 12371 is opened on the end of the stator connecting portion 1237 away from the mounting body 123, and the fixing hole 12371 is in communication with the first accommodating space 1231 The stator teeth 132 are inserted into the fixing holes 12371, and the stator coil 133 is wound on the stator connecting portion 1237. In this way, the stator teeth 132 can be directly installed after the stator coil 133 is wound, and its assembly is more convenient.

It should be noted that, in this embodiment, the number of stator teeth 132, stator coil 133, and stator connection portion 1237 are all two, and the two stator connection portions 1237 are symmetrically arranged on the outer surface of the mounting body 123.

Optionally, the stator tooth 132 may include a tooth 1321 and a yoke 1322, wherein the yoke 1322 is arranged in a U shape, and the tooth 1321 penetrates through the fixing hole 12371; the tooth 1321 is connected to the middle of the yoke 1322, wherein , The middle part refers to the position corresponding to the middle part of the third part when the corresponding object is divided into three equal parts according to its length direction. When the tooth 1321 is inserted in the fixing hole 12371, the two ends of the yoke 1322 on one side of the mounting body 123 are respectively connected to the two ends of the yoke 1322 on the other side of the mounting body 123 to improve the motor The torque of assembly 10. The yoke 1322 and the tooth 1321 may be made of magnetically conductive materials, such as iron, nickel-cobalt, and alloys thereof. In addition, it should be noted that the yoke 1322 and the tooth 1321 may also be integrally formed.

It should be noted that the stator connecting portion 1237 may also be protrudingly provided with a stator fixing portion 1239. The stator fixing portion 1239 is in the shape of an arc plate and is matched with the yoke portion 1322. The fixing hole 12371 penetrates the stator fixing portion 1239, and the stator is fixed. There is a gap between the portion 1239 and the mounting body 123, the stator coil 133 is located within the gap, and the stator coil 133 and the yoke portion 1322 are separated by the stator fixing portion 1239.

Please refer to FIG. 6, FIG. 10 and FIG. 11. FIG. 10 is a schematic diagram of the structure of the motor assembly 10 provided by the embodiment of the disclosure after being assembled. Fig. 11 is a schematic cross-sectional structure diagram at A-A in Fig. 10.

Optionally, one end of the installation body 123 is the output terminal 12317, and the output opening 12315 can be opened on the output terminal 12317. The mounting bracket 12 may further include a sealing member 125, which is sleeved on the output end 12317, and the sealing member 125 is snap-fitted with the output end 12317. The part of the rotating shaft 1312 of the rotor 131 extends out of the first accommodating space 1231 from the output opening 12315 and passes through the sealing member 125 to be connected to the brush head 20. The sealing member 125 is configured to seal the output opening 12315 of the first accommodating space 1231 for the rotating shaft 1312 to extend, so as to prevent impurities such as water from entering the first accommodating space 1231 through the output opening 12315.

It should be noted that the output end 12317 can also be provided with multiple connection through holes 12316, and one end of the multiple connection through holes 12316 extends to the output opening 12315, and the material of the output end 12317 is plastic and has elasticity. On the outer surface of the mounting body 123, a clamping block 1238 can also be protrudingly provided, and the clamping block 1238 is located at the output end 12317. A card interface 1252 can be provided on the sealing member 125, and the sealing member 125 is sleeved on the At the output end 12317, the clamping block 1238 is clamped to the card interface 1252 to clamp the seal 125 and the output end 12317. In addition, by opening a plurality of connecting through holes 12316, the caliber of the output end 12317 is elastically deformed and becomes smaller, thereby facilitating the sealing member 125 to be clamped to the output end 12317.

In addition, the sealing member 125 may include a sealing portion 1251 and a sealing connection portion 1253, the card interface 1252 is located on the sealing portion 1251, and the sealing connection portion 1253 is sleeved outside the output end 12317. Optionally, the sealing portion 1251 is made of a soft material such as rubber and is sleeved outside the sealing connection portion 1253. At the same time, the sealing portion 1251 is sleeved outside the rotating shaft 1312 to seal the first accommodating space 1231.

The working principle of the motor assembly 10 provided by the embodiment of the present disclosure is:

The driving mechanism 13 includes a rotor 131, a stator tooth 132, and a stator coil 133. The mounting bracket 12 is configured to be connected to the handle 30 of the electric toothbrush 100. The mounting bracket 12 includes a mounting cover 121 and a mounting body 123. A first accommodating space 1231 and a first installation opening 12312 are provided thereon, and the first accommodating space 1231 and the first installation opening 12312 are communicated with each other. The mounting cover 121 is disposed at the first mounting opening 12312 and connected with the mounting body 123 to jointly clamp the rotor 131 in the first accommodating space 1231, and the rotor 131 can rotate relative to the mounting body 123. The rotor 131 is configured to be in driving connection with the brush head 20 of the electric toothbrush 100. The stator coil 133 is wound around the outer surface of the mounting body 123, and the stator teeth 132 are connected to the mounting body 123 and penetrate through the stator coil 133 and correspond to the rotor 131 so as to drive the rotor 131 to swing. In this way, the rotor 131 and the stator teeth 132 are directly installed by the installation body 123, so as to eliminate the need for a bracket for separately installing the rotor 131, the stator coil 133 and the stator teeth 132, which reduces the volume of the motor assembly 10 for the convenience of users. The brush handle 30 is held, and the installation method in which the cover 121 and the main body 123 clamp the rotor 131 together makes the assembly of the rotor 131 more flexible and convenient.

In summary:

The embodiments of the present disclosure provide a motor assembly 10, which at least has the feature of a small overall volume; at the same time, the electric toothbrush 100 provided by the present disclosure includes the motor assembly 10, and the electric toothbrush 100 has at least the feature of a small overall volume.

The above descriptions are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, without conflict, the features in the foregoing embodiments can be combined with each other, and the present disclosure also There can be various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure. Furthermore, the embodiments should be regarded as exemplary and non-limiting. The scope of the present disclosure is defined by the appended claims rather than the above description, and therefore it is intended to fall within the meaning and scope of equivalent elements of the claims. All changes of are included in this disclosure. Any reference signs in the claims should not be regarded as limiting the claims involved.

Industrial applicability:

In summary, the present disclosure provides a motor assembly and an electric toothbrush, which have a small overall volume and are convenient for users to hold.

Claims

A motor assembly, characterized by comprising a mounting bracket and a driving mechanism, the driving mechanism including a rotor, stator teeth and stator coils;

The mounting bracket is configured to be connected to the handle of the electric toothbrush. The mounting bracket includes a mounting cover and a mounting body. The mounting body is provided with a first accommodating space and a first mounting opening that communicate with each other. The mounting cover is provided on the first mounting opening and clamps the rotor in the first accommodating space together with the mounting body. The rotor is rotatable relative to the mounting body and is configured to interact with The brush head transmission connection of the electric toothbrush;

The stator coil is wound on the outer side surface of the mounting body, and the stator teeth are connected to the mounting body, pass through the stator coil, and correspond to the rotor.
The motor assembly of claim 1, wherein the first mounting opening is configured to allow the rotor to pass through, so that the rotor can be installed into the first container through the first mounting opening.置空间.
The motor assembly according to claim 1 or 2, wherein the mounting cover is detachably connected to the mounting main body.
The motor assembly according to claim 3, wherein one end of the mounting cover is a clamping end, and the clamping end is clamped with the edge of the first mounting opening, and the mounting cover The other end is detachably connected with the edge of the first installation opening.
The motor assembly according to claim 4, wherein the clamping end is configured to clamp the rotor together with the mounting body, the end surface of the clamping end is a clamping end surface, and the clamping end surface A first engaging protrusion is protrudingly provided on the upper side, and a first engaging portion is protrudingly provided on the first engaging protrusion;

The edge of the first mounting opening is provided with a clamping notch communicating with the first accommodating space, the first clamping protrusion is located in the clamping notch, and the first clamping portion is located in the In the first accommodating space and against the wall surface of the first accommodating space, the clamping end is detachably clamped to the installation body.
The motor assembly according to claim 5, wherein there is a clamping interval between the first clamping portion and the clamping end surface;

The wall surface of the first accommodating space is protrudingly provided with a first clamping protrusion, and the first clamping protrusion is located in the clamping interval and is connected to the first clamping portion and/or the first clamping portion and/or the first clamping portion. The clamping end face resists.
The motor assembly according to claim 6, wherein the wall surface of the first accommodating space is protrudingly provided with a second clamping protrusion, and the second clamping protrusion is compared with the first card The connecting protrusion is away from the first installation opening; the first clamping portion abuts against the second clamping protrusion.
The motor assembly according to claim 7, wherein at least one of the second clamping protrusion and the first clamping portion is provided with a guiding inclined surface, and the guiding inclined surface is configured to When the first clamping portion and the second clamping protrusion are close to each other, they are guided to abut against two sides in the radial direction of the rotor.
The motor assembly according to claim 3, wherein one end of the mounting cover is a clamping end, the clamping end is connected with the mounting body by a screw, and the other end of the mounting cover is connected to The installation main body is snap-fitted through a snap-fit structure.
The motor assembly according to any one of claims 1-9, wherein the rotor includes a rotating shaft, an iron core, a magnet, and shrapnel, the iron core is connected to the rotating shaft, and the magnet is connected to the The iron core is connected, the elastic piece is simultaneously clamped with the installation cover and the installation main body; the rotating shaft is rotationally matched with the installation main body.
The motor assembly according to claim 10, wherein at least one of the mounting cover and the mounting main body is provided with a clamping groove, and the elastic piece is engaged with the clamping groove .
The motor assembly according to claim 11, wherein the clamping groove comprises a first groove section and a second groove section that are connected, and the elastic piece is in snap fit with the first groove section; The groove width of the second groove section gradually increases in the direction from the first groove section to the second groove section, so as to guide the elastic piece from the second groove section into the first groove section.
The motor assembly according to any one of claims 1-12, wherein the outer side of the mounting body is protrudingly provided with a stator connecting portion, and an end of the stator connecting portion away from the mounting body is provided with A fixing hole, the fixing hole communicates with the first accommodating space;

The stator coil is wound around the stator connection portion, and the stator teeth are inserted into the fixing holes.
The motor assembly according to claim 13, wherein the number of the stator teeth, the stator coil and the stator connection part are all two, and the two stator connection parts are symmetrically arranged in the mounting The outer side of the main body;

The stator tooth includes a tooth part and a yoke part, the yoke part is arranged in a U shape, the tooth part penetrates the fixing hole and is connected to the middle part of the yoke part, and the mounting body is The two ends of the yoke are respectively in contact with the two ends of the yoke on the other side of the mounting body.
The motor assembly according to claim 14, wherein a positioning fixing portion is protrudingly provided on the stator connecting portion, and the positioning fixing portion is matched with the yoke portion; the fixing hole penetrates the positioning fixing portion , The stator coil is arranged between the stator fixing part and the mounting body.
The motor assembly according to any one of claims 1-15, wherein one end of the mounting body is an output end, the output end is provided with an output opening, and the mounting bracket further includes a seal, The sealing member is sleeved on the output end, and is clamped to the output end;

The rotor can partially extend out of the first accommodating space from the output opening and pass through the sealing member to be connected with the brush head.
The motor assembly according to any one of claims 1-16, wherein the motor assembly further comprises a power source, and the power source is electrically connected to the stator coil;

The installation main body is also provided with a second accommodating space and a second installation opening that communicate with each other. The second installation opening is located on the side of the installation main body and can allow the power supply to pass through. The storage space is configured to accommodate the power supply.
The motor assembly according to claim 17, wherein the mounting main body is provided with a plurality of snap-fit elastic pieces, and the plurality of snap-fit elastic pieces work together to clamp the power supply to extend out of the second container. Part of the accommodating space, thereby preventing the power supply from falling out of the second accommodating space from the second installation opening.
The motor assembly according to claim 18, wherein the second installation opening has two opposite sides, and each side is provided with a plurality of the snap-fit springs, and the plurality of snaps on the same side The elastic receiving pieces are arranged at intervals along the extending direction of the second installation opening.
An electric toothbrush, characterized by comprising a brush head, a brush handle and the motor assembly according to any one of claims 1-19;

The mounting bracket of the motor assembly is connected in the handle of the electric toothbrush, and the rotor of the motor assembly is drivingly connected with the brush head of the electric toothbrush.