Oscillating motor for electric toothbrushes and method of assembling the same

Abstract

The application belongs to the field of electric machines, and particularly relates to a swing motor for an electric toothbrush and an assembling method thereof. The motor comprises a rotor assembly and a stator assembly. A front end of a front insulating sheet of the rotor assembly is provided with a radially protruding hanging wire body upward and downward, respectively. Two lead wires of a coil winding are respectively wound and hung on the upward and downward hanging wire bodies during winding. The two connecting flexible wires are respectively welded with the two lead wires of the coil winding at the upward and downward rear ends of the front insulating sheet. The upper and lower stator supports in the stator assembly are respectively provided with wire clamping structures. The connecting flexible wires are led out through the wire leading holes after being led out from the wire clamping structures. The two permanent magnets installed on the lower stator support have the same magnetic polarity towards the iron core, and the two permanent magnets on the upper stator support have the opposite magnetic polarity towards the iron core. The magnetic conductive shell is correspondingly formed with a closed magnetic conductive frame upward and downward. The stator assembly of the motor is in a two-half structure symmetrically distributed with the axis of the motor shaft as the center, and the hanging wire body and the wire clamping structure are designed, so that winding is convenient and assembling is simple.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more specifically, to a oscillating motor for an electric toothbrush and its assembly method. Background Technology

[0002] For example, in existing brushed permanent magnet micromotors with patent number ZL201810444342.0, a commutator and brushes are used to power the coil windings. The motor has a two-half structure, with fixed brushes and connecting wires connecting to the brushes. The commutator and brushes are costly and occupy a large space; however, the winding process is simple and assembly is convenient. The oscillating motor for electric toothbrushes made using this patent, employing a commutator and brushes, has good performance, but both occupy a large space, have a complex assembly process, and are costly. If the commutator and brushes are not used, and existing winding fixtures and processes are used, the problems of winding the coil windings, hanging the wires, and connecting the power supply wires need to be solved. Summary of the Invention

[0003] This application provides an oscillating motor for an electric toothbrush and its assembly method, which enables the oscillating motor for an electric toothbrush to achieve wire fixing in an insulated state for the coil leads of the coil winding without a commutator. Moreover, the oscillating motor for an electric toothbrush is simple to assemble and has good structural consistency.

[0004] In a first aspect, embodiments of this application provide a oscillating motor for an electric toothbrush, comprising: The mover assembly includes a motor shaft, iron core, front insulating sheet, rear insulating sheet, coil winding, connecting wire, and bearing; The iron core is threaded onto the motor shaft, and the front insulating sheet and the rear insulating sheet are respectively fitted onto the front and rear ends of the iron core; The coil winding is wound on the iron core and the front and rear insulating sheets; there are two bearings, which are respectively mounted on the motor shaft on both sides of the coil winding; The front end of the front insulating sheet is threaded onto the motor shaft, and the rear end of the front insulating sheet is fitted onto the iron core; the front end of the front insulating sheet is provided with radially extending hanging bodies at the top and bottom, and when winding, the two coil leads of the coil winding are respectively wound and hung on the two hanging bodies distributed at the top and bottom; there are two connecting flexible wires, and the two connecting flexible wires are welded to the two coil leads at the top and bottom of the rear end of the front insulating sheet, respectively. A stator assembly, comprising an upper stator support, a lower stator support, and permanent magnets and magnetic housings respectively mounted on the upper stator support and the lower stator support; Both the upper stator support and the lower stator support are provided with a recess that matches half of the mover assembly, a bearing recess that accommodates half of the bearing, and two magnet through holes for mounting the permanent magnet. The upper stator bracket and the lower stator bracket are configured with a plane passing through the center line of the motor shaft as the interface. The recessed portions of the upper stator bracket and the lower stator bracket are joined together to form a complete mounting cavity for installing the mover assembly, and the mover assembly is installed in the mounting cavity. The bearing recessed portions of the upper stator bracket and the lower stator bracket are joined together to form a complete bearing seat hole. The permanent magnet has four pieces, which are respectively installed in the magnet through holes on the upper stator support and the lower stator support; the two permanent magnets installed on the upper stator support have the same magnetic polarity facing the iron core; the two permanent magnets installed on the lower stator support have the same magnetic polarity facing the iron core, and opposite magnetic polarity to the two permanent magnets on the upper stator support facing the iron core. The magnetic conductive shell consists of two pieces, which are respectively installed on the upper stator support and the lower stator support. The two magnetic conductive shells are attracted together with the permanent magnets in the magnet through holes of the upper stator support and the permanent magnets in the magnet through holes of the lower stator support, respectively. The two magnetic conductive shells are symmetrical and correspondingly form a closed magnetic conductive frame and are attracted together.

[0005] Optionally, both of the hanging bodies are provided with a narrow neck, and two coil leads are respectively wound and hung on the two narrow necks.

[0006] Optionally, both of the wire-hanging bodies are provided with a wire-releasing groove or a wire-releasing hole, the bottom of the groove or hole being close to the motor shaft; the connecting wire passes through the wire-releasing groove or the wire-releasing hole.

[0007] Optionally, a guide plate is provided at the front end of the wire feeding groove or wire feeding hole.

[0008] Optionally, the width of the wire feeding groove or wire feeding hole near the bottom of the groove or hole is greater than or equal to the diameter of the connecting wire itself plus the sum of the swing distance of the connecting wire at the bottom of the groove or hole when the motor is working.

[0009] Optionally, the upper stator support and the lower stator support are each provided with two sets of wire-clamping structures and wire-out holes on the left and right sides. Each set of wire-clamping structures is provided with two wire-clamping protrusions. The connecting wire comes out from the wire-out groove or wire-out hole, passes around the guide plate, is clamped between the two wire-clamping protrusions, and is then led out through the wire-out hole.

[0010] Optionally, the left and right sets of wire clamping structures have different structures. When the upper stator bracket and the lower stator bracket are fastened together, the left and right sets of wire clamping structures are interlocked to hold the connecting flexible wire in place.

[0011] Optionally, the outlet hole is provided with a side opening.

[0012] Optionally, it also includes a brush head insertion shaft for inserting a toothbrush head, which is sleeved and fixed at one end of the motor shaft near the rear insulating sheet.

[0013] In a second aspect, embodiments of this application provide an assembly method applied to the aforementioned oscillating motor for an electric toothbrush, comprising: Steps for assembling the mover assembly: The iron core with the motor shaft and the front and rear insulating sheets is placed into the winding machine to wind the coil winding. The two coil leads of the coil winding are respectively wound and hung on the two hanging bodies formed on the front insulating sheet and distributed vertically. Pick up the coil lead from the middle of the coil winding; Pass the connecting wire through the wire slot or wire hole of the hanging body; at the rear end of the front insulating sheet, solder the connecting wire to the raised coil lead; After bending the connecting wire around the guide plate of the front insulating sheet, two bearings are fitted onto both ends of the motor shaft; the mover assembly is now complete. Steps for placing the moving component: The two bearings are placed in the two bearing recesses formed on the lower stator support, thereby placing the mover assembly on the lower stator support; the connecting wire is bent and inserted into the wire clamping structure formed on the lower stator support; Steps to encapsulate a child component: Pull the connecting cable into the outlet hole formed on the lower stator bracket and provided with a side opening, and then fasten the upper stator bracket.

[0014] The beneficial effects are as follows: Compared to existing electric toothbrush oscillating motors with brushes and commutators, the oscillating motor of this application eliminates the need to solder the coil leads to the commutator. Instead, during coil winding, the two coil leads are wound and hung on two hanging bodies distributed vertically at the front end of the front insulating sheet. These hanging bodies facilitate the connection of the coil leads and allow them to be suspended along the axial direction of the mover assembly. This allows for easy soldering of the connecting wire to the coil leads, with a relatively long section of the connecting wire extending axially to the guide plate. As the coil winding oscillates back and forth around the motor shaft centerline, the solder joints drive this axially extending section of the connecting wire to oscillate. The longer length of the connecting wire participating in the oscillation minimizes metal fatigue, effectively improving the reliability and lifespan of the connecting wire. By eliminating the commutator and brushes, and using insulating hanging bodies to wind and hold the coil leads while the connecting wire is directly soldered to them, materials and space are saved, and assembly is simplified.

[0015] Furthermore, since the upper and lower stator supports are symmetrically structured with a plane passing through the center line of the motor shaft as the interface, they can be joined together through the recesses of the upper and lower stator supports to form a complete mounting cavity for installing the mover assembly, making it relatively easy to install the mover assembly into the mounting cavity. This greatly simplifies the manufacturing and assembly process of the oscillating motor for electric toothbrushes, and the oscillating motor for electric toothbrushes also exhibits better structural consistency.

[0016] In addition, the two magnetic shells are made of iron and are attracted by permanent magnets installed on the upper and lower stator supports respectively, so that the magnetic polarities of the two magnetic shells are opposite. The magnetic attraction between the two magnetic shells can pull the upper and lower stator supports together, realizing the assembly between the upper and lower stator supports. This method does not require screws or clips, and the assembly between the upper and lower stator supports can be achieved solely through magnetic attraction. Of course, disassembly is also convenient. Its process is simple, which not only improves assembly efficiency, but also effectively saves labor costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of an electric toothbrush oscillating motor according to an embodiment of this application; Figure 2 for Figure 1 Exploded view of the oscillating motor used in a medium-sized electric toothbrush (magnetic housing not shown); Figure 3 for Figure 1 A schematic diagram of the moving part assembly of the oscillating motor used in a medium-sized electric toothbrush; Figure 4 for Figure 1 A schematic diagram of the stator assembly of a oscillating motor for an electric toothbrush; Figure 5 for Figure 1 A schematic diagram of the front insulating sheet of the oscillating motor for a medium-sized electric toothbrush (including front and left views). Figure 6 for Figure 1 Exploded view of the internal components of the oscillating motor in a medium-sized electric toothbrush after removing the upper and lower stator supports; Figure 7 for Figure 1 Exploded view of the upper and middle stator support; Figure 8 for Figure 1 Exploded view of the lower and middle stator support.

[0019] Icons: 1-Motor assembly; 11-Motor shaft; 12-Iron core; 13-Front insulating sheet; 131-Wire hanging body; 1311-Wire release slot or wire release hole; 13111-Slot bottom or hole bottom; 1312-Neck; 133-Rear end of front insulating sheet; 134-Guide plate; 14-Rear insulating sheet; 15-Coil winding; 151-Coil lead; 16-Connecting flexible wire; 161-Solder point; 17-Bearing; 2-Stator assembly; 20-Recess; 21-Upper stator bracket; 211-Wire clamping structure; 2111-Wire clamping protrusion; 212-Wire outlet hole; 2121-Side opening; 213-Magnet through hole; 214-Wire outlet slot; 215-Bearing recess; 22-Lower stator bracket; 23-Permanent magnet; 24-Magnetic shell; 3-Brush head insertion shaft. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical." It does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] Please refer to Figures 1 to 8 One embodiment provides an oscillating motor for an electric toothbrush, which belongs to the oscillating motor type. The oscillating motor for an electric toothbrush generally includes five parts: a mover assembly 1, a stator assembly 2, an upper stator support 21, a lower stator support 22, and a magnetic housing 24, which are described below.

[0027] The mover assembly 1 includes a motor shaft 11, an iron core 12, a front insulating sheet 13, a rear insulating sheet 14, a coil winding 15, connecting wires 16, and bearings 17. The iron core 12 is threaded onto the motor shaft 11, and the front insulating sheet 13 and the rear insulating sheet 14 are respectively fitted onto the front and rear ends of the iron core 12. The coil winding 15 is wound around the iron core 12 and the front and rear insulating sheets 13 and 14. There are two bearings 17, which are respectively fitted onto the motor shaft 11 on both sides of the coil winding 15. The front end of the front insulating sheet 13 is threaded onto the motor shaft 11, and the rear end 133 of the front insulating sheet is fitted onto the iron core 12. The front end of the front insulating sheet 13 has radially extending hanging bodies 131 at both the top and bottom. During winding, the two coil leads 151 of the coil winding 15 are respectively wound and hung on the two hanging bodies 131 distributed at the top and bottom. There are two connecting wires 16. The two connecting wires 16 are soldered to the two coil leads 151 at the top and bottom of the rear end 133 of the front insulating sheet, respectively, to form solder joints 161.

[0028] The stator assembly 2 includes an upper stator support 21, a lower stator support 22, and permanent magnets 23 and magnetic shells 24 respectively mounted on the upper stator support 21 and the lower stator support 22.

[0029] Both the upper stator support 21 and the lower stator support 22 are provided with a recess 20 that matches half of the mover assembly 1, a bearing recess 215 that accommodates half of the bearing 17, and two magnet through holes 213 for mounting permanent magnets 23.

[0030] The upper stator support 21 and the lower stator support 22 are configured with a plane passing through the center line of the motor shaft 11 as the interface. The recesses 20 of the upper stator support 21 and the lower stator support 22 are joined together to form a complete mounting cavity for mounting the mover assembly 1. The mover assembly 1 is installed in the mounting cavity. The bearing recesses 215 of the upper stator support 21 and the lower stator support 22 are joined together to form a complete bearing seat hole.

[0031] There are four permanent magnets 23, which are respectively installed in the magnet through holes 213 on the upper stator support 21 and the lower stator support 22; the two permanent magnets 23 installed on the upper stator support 21 have the same magnetic polarity facing the iron core 12; the two permanent magnets 23 installed on the lower stator support 22 have the same magnetic polarity facing the iron core 12, and opposite magnetic polarity to the two permanent magnets 23 installed on the upper stator support 21 facing the iron core 12.

[0032] There are two magnetic shells 24, which are respectively installed on the upper stator support 21 and the lower stator support 22. The two magnetic shells 24 are attracted together with the permanent magnets 23 in the magnet through holes 213 of the upper stator support 21 and the permanent magnets 23 in the magnet through holes 213 of the lower stator support 22. The two magnetic shells 24 are symmetrical and form a closed magnetic frame and are attracted together.

[0033] The working process of the oscillating motor in the above-mentioned electric toothbrush is as follows: When power is supplied to the two connecting wires 16, the current is introduced through the connecting wires 16 to the two coil leads 151 welded to them, and then through the coil leads 151 to the coil winding 15, so that the coil winding 15 is energized.

[0034] Since the two permanent magnets 23 mounted on the upper stator bracket 21 have the same magnetic polarity facing the iron core 12, and the two permanent magnets 23 mounted on the lower stator bracket 22 have the same magnetic polarity facing the iron core 12, and opposite magnetic polarity to the two permanent magnets 23 mounted on the upper stator bracket 21 facing the iron core 12.

[0035] Therefore, under the magnetic field of the permanent magnet 23, the drive coil winding 15 oscillates frequently between the upper stator support 21 and the lower stator support 22 around the motor shaft 11. When the brush head insertion shaft 3 for inserting the toothbrush head is sleeved and fixed to one end of the motor shaft 11 near the rear insulating sheet 14, it can drive the brush head insertion shaft 3 to oscillate frequently and synchronously. After the toothbrush head is installed on the brush head insertion shaft 3, it can drive the toothbrush head to oscillate frequently and synchronously. That is, the toothbrush head, the brush head insertion shaft 3 and the coil winding 15 oscillate frequently and synchronously. After the toothbrush head is oscillating, it can perform the tooth cleaning action.

[0036] Compared to existing electric toothbrush oscillating motors with brushes and commutators, one embodiment of the electric toothbrush oscillating motor eliminates the need to solder the coil leads 151 to the commutator. Instead, during the winding of the coil winding 15, the two coil leads 151 are wound and hung on two hanging bodies 131 distributed vertically at the front end of the front insulating sheet 13. The hanging bodies 131 facilitate the connection of the coil leads 151 and allow the coil leads 151 to be suspended along the axial direction of the mover assembly 1. This facilitates the soldering of the connecting wire 16 to the coil leads 151, allowing a longer section of the connecting wire 16 to extend axially to the guide plate 134. As the coil winding 15 oscillates back and forth around the center line of the motor shaft 11, the solder joint 161 drives this section of the axially extending connecting wire 16 to oscillate. Because the longer connecting wire 16 participates in the oscillation, the metal fatigue of the connecting wire 16 can be minimized, effectively improving the working reliability and service life of the connecting wire 16. Without the commutator and brushes, the hanging body 131 with insulating material is used to wrap around and hang the coil lead 151, while the connecting wire 16 is directly welded to the coil lead 151, saving materials and space, and making assembly simpler.

[0037] Furthermore, insulating glue is applied to the solder joint 161 to fix the solder joint 161 and the coil lead 151, so as to prevent the connecting wire 16 from pulling on the coil lead 151; the connecting wire 16 will swing along with the swing of the coil lead 151.

[0038] Furthermore, since the upper stator support 21 and the lower stator support 22 are configured with a plane passing through the center line of the motor shaft 11 as the interface, and the two have a symmetrical structure, a complete mounting cavity for installing the mover assembly 1 can be formed by splicing the recesses 20 of the upper stator support 21 and the lower stator support 22. This allows for convenient installation of the mover assembly 1 into the mounting cavity. This greatly simplifies the manufacturing and assembly process of the oscillating motor for electric toothbrushes, and also results in better structural consistency of the oscillating motor for electric toothbrushes.

[0039] In addition, the two magnetic shells 24 are made of iron and are attracted by permanent magnets 23 installed on the upper stator support 21 and the lower stator support 22 respectively, so that the magnetic polarities of the two magnetic shells 24 are opposite. The magnetic attraction force of the two magnetic shells 24 can pull the upper stator support 21 and the lower stator support 22 together, realizing the assembly between the upper stator support 21 and the lower stator support 22. This method does not require screws or clips, and the assembly between the upper stator support 21 and the lower stator support 22 can be realized by magnetic attraction alone. Of course, disassembly is also convenient. Its process is simple, which not only improves assembly efficiency, but also effectively saves labor costs.

[0040] In one embodiment, since the coil lead 151 will still swing slightly, in order to prevent the coil lead 151 attached to the hanging body 131 from falling off the hanging body 131, a thin neck 1312 can also be provided on the hanging body 131. The thin neck 1312 is like a barb structure, which can firmly attach the coil lead 151 and prevent slippage, thus effectively ensuring the working reliability of the oscillating motor for the electric toothbrush.

[0041] In one embodiment, since the connecting wire 16 is suspended and soldered to the coil lead 151, the small-amplitude oscillation of the coil lead 151 will cause the connecting wire 16 to oscillate slightly as well. Because the connecting wire 16 is a conductive wire and is covered with an insulating layer, it is necessary to avoid the connecting wire 16 from touching moving parts such as the iron core 12 and the coil winding 15 during the design process. Therefore, it is necessary to position and limit the connecting wire 16. However, the internal space of the oscillating motor of the electric toothbrush is cramped and limited. Therefore, the connecting wire can be suspended... The body 131 is provided with a wire feeding groove or wire feeding hole 1311. The bottom of the groove or hole 13111 is close to the motor shaft 11, so that the connecting wire 16 passes through the wire feeding groove or wire feeding hole 1311, thereby completing the placement of the connecting wire 16. In other words, the wire hanging body 131 can not only place the connecting wire 16, but also simultaneously hang the coil lead 151. It makes full use of the internal space of the electric toothbrush oscillating motor, making the structure of the electric toothbrush oscillating motor compact and simple.

[0042] In one embodiment, a guide plate 134 is further provided at the front end of the wire feeding groove or hole 1311. This allows the connecting wire 16 to emerge from the wire feeding groove or hole 1311, bypass the guide plate 134, and lengthen the curvature of the connecting wire 16. During oscillation, a longer connecting wire 16 participates in deformation, reducing the risk of fatigue breakage. Since the two connecting wires 16 bend in opposite directions, to easily distinguish the bending directions, the guide plate 134 is provided on only one side of the front end of each wire feeding groove or hole 1311. By adding the guide plate 134, the service life of the connecting wire 16 can be effectively improved, thereby ensuring the reliability of the oscillating motor used in the electric toothbrush.

[0043] In one embodiment, when the electric toothbrush oscillating motor is working, the connecting cord 16 will oscillate back and forth slightly to both sides within the cord groove or cord hole 1311. In order to provide more room for the connecting cord 16 to move, the width of the cord groove or cord hole 1311 near the bottom of the groove or hole 13111 can be greater than or equal to the diameter of the connecting cord 16 itself plus the sum of the oscillation distance of the connecting cord 16 at the bottom of the groove or hole 13111 when the motor is working. Specifically, the bottom of the cord groove or cord hole 13111 is as wide as possible to provide as much space as possible for the connecting cord 16 to swing left and right. This design allows the longer connecting cord 16 to participate in deformation, making it less prone to fatigue breakage, which can effectively improve the service life of the connecting cord 16 and thus ensure the reliability of the electric toothbrush oscillating motor.

[0044] In one embodiment, when the connecting cable 16 needs to be led out of the space defined by the upper stator bracket 21 and the lower stator bracket 22 to connect to the power supply, the upper stator bracket 21 and the lower stator bracket 22 are each provided with two sets of left and right cable clamping structures 211 and cable outlet holes 212. Each set of cable clamping structures 211 is provided with two cable clamping protrusions 2111. The connecting cable 16 comes out from the cable outlet groove or cable outlet hole 1311, passes around the guide piece 134, is clamped between the two cable clamping protrusions 2111, and is then led out through the cable outlet hole 212. In this way, when the upper stator bracket 21 and the lower stator bracket 22 are fastened together, the left and right sets of cable clamping structures 211 interlock with each other, locking the connecting cable 16 in place. This ensures that the portion of the connecting cable 16 from the solder point 161 to the locking position is not prone to fatigue breakage during high-frequency oscillation, effectively improving the service life of the connecting cable 16 and thus ensuring the reliability of the oscillating motor for the electric toothbrush.

[0045] As a preferred improvement, for example, the structures of the left and right sets of wire clamping structures 211 can be different. When the upper stator bracket 21 and the lower stator bracket 22 are fastened together, the left and right sets of wire clamping structures 211 are interlocked to hold the connecting wire 16 in place.

[0046] The upper edge of the wire-clamping protrusion 2111 is beveled and inclined, so that it will not press on the connecting wire 16 when they are snapped together; at the same time, the connecting wire 16 can also slide into the wire-clamping structure 211 more easily, which facilitates the assembly of the oscillating motor of the electric toothbrush.

[0047] In one embodiment, the cable outlet 212 is provided with a side opening 2121. The side opening 2121 facilitates the connection of the flexible cable 16 through which it is pulled into the cable outlet 212, enabling faster cable threading and improving assembly efficiency. Since the side opening 2121 and the cable outlet 212 are connected, the flexible cable 16 can be freely selected to exit from above or below, which enhances the flexibility and convenience of assembly.

[0048] Furthermore, in one embodiment, as Figure 4 As shown, two cable outlet slots 214 can also be provided on the upper stator bracket 21 and the lower stator bracket 22, and the connecting cable 16 can be directly led out from these cable outlet slots 214, so that the motor can meet the application requirements of cable outlet from the rear.

[0049] The above describes the structure of the oscillating motor for an electric toothbrush. The following describes the assembly method of the oscillating motor for an electric toothbrush, which roughly includes the steps of assembling the mover assembly 1, placing the mover assembly 1, and encapsulating the mover assembly 1.

[0050] First, the steps for assembling the mover assembly 1 include: The iron core 12, which has a motor shaft 11 and is fitted with a front insulating sheet 13 and a rear insulating sheet 14, is placed into a winding machine to wind a coil winding 15. The two coil leads 151 of the coil winding 15 are respectively wound and hung on two hanging bodies 131 formed on the front insulating sheet 13 and distributed vertically. In this way, the coil winding 15 will not unravel. At this time, the bearing 17 near the rear insulating sheet 14 can be fitted onto the motor shaft 11, and then the brush head insertion shaft 3 can be fixed onto the motor shaft 11.

[0051] The coil lead 151 is lifted from the middle of the coil winding 15. When lifting the coil lead 151, the end of the coil lead 151 is still wrapped around the hanging body 131, which facilitates soldering and soldering with the connecting flexible wire 16. The solder joint 161 will not touch the iron core 12.

[0052] Pass the connecting wire 16 through the wire release slot or wire release hole 1311 of the wire hanger 131, and solder the connecting wire 16 to the raised coil lead 151 at the rear end 133 of the front insulating sheet. The solder joint 161 can be glued to the middle of the coil winding 15 by applying insulating glue.

[0053] After bending the connecting wire 16 around the guide piece 134 of the front insulating sheet 13, two bearings 17 are fitted onto both ends of the motor shaft 11, and the mover assembly 1 is completed.

[0054] Secondly, the steps for placing the moving component 1 include: Two bearings 17 are placed correspondingly into the two bearing recesses 215 formed on the lower stator support 22, thereby placing the mover assembly 1 on the lower stator support 22. The connecting wire 16 is bent and inserted into the wire clamping structure 211 formed on the lower stator support 22.

[0055] Finally, the steps for encapsulating the dynamic component 1 include: Pull the connecting cable 16 into the cable outlet 212 formed on the lower stator bracket 22 and provided with a side opening 2121, and then fasten the upper stator bracket 21. In this way, the connecting cable 16 will not be pressed down when the fastening action is performed.

[0056] The assembly method for the aforementioned oscillating motor in electric toothbrushes is simple and efficient. The oscillating motor eliminates the commutator and brush structure, saving materials and space. The wire hanger 131 is compatible with traditional automatic winding processes, and the wire clamping structure 211 limits the connection wire 16, reducing the risk of breakage due to metal fatigue from high-frequency oscillation. The two-half stator structure facilitates assembly, has strong mold versatility, and the assembly process can be adapted to automated production, making it suitable for mass production of oscillating micro-motors for electric toothbrushes.

[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A oscillating motor for an electric toothbrush, characterized in that, include: The mover assembly includes a motor shaft, iron core, front insulating sheet, rear insulating sheet, coil winding, connecting wire, and bearing; The iron core is threaded onto the motor shaft, and the front insulating sheet and the rear insulating sheet are respectively fitted onto the front and rear ends of the iron core; The coil winding is wound on the iron core and the front and rear insulating sheets; there are two bearings, which are respectively mounted on the motor shaft on both sides of the coil winding; The front end of the front insulating sheet is threaded onto the motor shaft, and the rear end of the front insulating sheet is fitted onto the iron core; the front end of the front insulating sheet is provided with radially extending hanging bodies at the top and bottom, and when winding, the two coil leads of the coil winding are respectively wound and hung on the two hanging bodies distributed at the top and bottom; there are two connecting flexible wires, and the two connecting flexible wires are welded to the two coil leads at the top and bottom of the rear end of the front insulating sheet, respectively. A stator assembly, comprising an upper stator support, a lower stator support, and permanent magnets and magnetic housings respectively mounted on the upper stator support and the lower stator support; Both the upper stator support and the lower stator support are provided with a recess that matches half of the mover assembly, a bearing recess that accommodates half of the bearing, and two magnet through holes for mounting the permanent magnet. The upper stator bracket and the lower stator bracket are configured with a plane passing through the center line of the motor shaft as the interface. The recessed portions of the upper stator bracket and the lower stator bracket are joined together to form a complete mounting cavity for installing the mover assembly, and the mover assembly is installed in the mounting cavity. The bearing recessed portions of the upper stator bracket and the lower stator bracket are joined together to form a complete bearing seat hole. The permanent magnet has four pieces, which are respectively installed in the magnet through holes on the upper stator bracket and the lower stator bracket; The two permanent magnets mounted on the upper stator bracket have the same magnetic polarity facing the iron core; The two permanent magnets mounted on the lower stator support have the same magnetic polarity facing the iron core, and the magnetic polarity is opposite to that of the two permanent magnets on the upper stator support facing the iron core. The magnetic conductive shell consists of two pieces, which are respectively installed on the upper stator support and the lower stator support. The two magnetic conductive shells are attracted together with the permanent magnets in the magnet through holes of the upper stator support and the permanent magnets in the magnet through holes of the lower stator support, respectively. The two magnetic conductive shells are symmetrical and correspondingly form a closed magnetic conductive frame and are attracted together.

2. The oscillating motor for an electric toothbrush according to claim 1, characterized in that, Both of the hanging bodies are provided with thin necks, and two coil leads are respectively wound and hung on the two thin necks.

3. The oscillating motor for an electric toothbrush according to claim 1, characterized in that, Both of the wire-hanging bodies are provided with a wire-releasing groove or a wire-releasing hole, and the bottom of the groove or hole is close to the motor shaft; the connecting wire passes through the wire-releasing groove or the wire-releasing hole.

4. The oscillating motor for an electric toothbrush according to claim 3, characterized in that, A guide plate is provided at the front end of the wire feeding groove or wire feeding hole.

5. The oscillating motor for an electric toothbrush according to claim 4, characterized in that, The width of the wire feeding groove or wire feeding hole near the bottom of the groove or hole is greater than or equal to the diameter of the connecting wire itself plus the sum of the swing distance of the connecting wire at the bottom of the groove or hole when the motor is working.

6. The oscillating motor for an electric toothbrush according to claim 4, characterized in that, The upper stator support and the lower stator support are each provided with two sets of wire clamping structures and wire outlet holes. Each set of wire clamping structures is provided with two wire clamping protrusions. The connecting wire comes out from the wire release groove or wire release hole, passes around the guide plate, is clamped between the two wire clamping protrusions, and is then led out through the wire outlet hole.

7. The oscillating motor for an electric toothbrush according to claim 6, characterized in that, The left and right sets of wire clamping structures have different structures. When the upper stator bracket and the lower stator bracket are fastened together, the left and right sets of wire clamping structures are interlocked to hold the connecting flexible wire in place.

8. The oscillating motor for an electric toothbrush according to claim 6, characterized in that, The cable outlet has a side opening.

9. The oscillating motor for an electric toothbrush according to any one of claims 1 to 8, characterized in that, It also includes a brush head insertion shaft for inserting a toothbrush head, which is sleeved and fixed at one end of the motor shaft near the rear insulating sheet.

10. An assembly method applied to an oscillating motor for an electric toothbrush as described in any one of claims 1 to 9, characterized in that, include: Steps for assembling the mover assembly: The iron core with the motor shaft and the front and rear insulating sheets is placed into the winding machine to wind the coil winding. The two coil leads of the coil winding are respectively wound and hung on the two hanging bodies formed on the front insulating sheet and distributed vertically. Pick up the coil lead from the middle of the coil winding; Pass the connecting wire through the wire slot or wire hole of the hanging body; at the rear end of the front insulating sheet, solder the connecting wire to the raised coil lead; After bending the connecting wire around the guide plate of the front insulating sheet, two bearings are fitted onto both ends of the motor shaft; the mover assembly is now complete. Steps for placing the moving component: The two bearings are placed in the two bearing recesses formed on the lower stator support, thereby placing the mover assembly on the lower stator support; the connecting wire is bent and inserted into the wire clamping structure formed on the lower stator support; Steps to encapsulate a child component: Pull the connecting cable into the outlet hole formed on the lower stator bracket and provided with a side opening, and then fasten the upper stator bracket.

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