Vibrating motor

Abstract

The present application provides a kind of vibration motor, it includes shell, stator and mobile that are spaced in the shell and are housed and the elastic piece of the mobile elastic suspension in the shell;The stator is fixed to the shell and is used to drive the mobile vibration;The stator includes coil fixed in the shell;The mobile includes two first magnetic steel distributed in the opposite sides of the coil and second magnetic steel located in the same side of two the first magnetic steel;The first magnetic steel has first magnetic area, the second magnetic steel has second magnetic area adjacent to the first magnetic area, the magnetic pole of the first magnetic area near the side of the coil and the magnetic pole of the second magnetic area near the side of the coil are same magnetic pole.The vibration motor of the present application not only improves the magnetic field utilization rate of magnetic steel, and the driving force of stator for driving mobile vibration is also improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vibration technology, and particularly relates to a vibration motor. BACKGROUND

[0002] The vibration motor is a machine for converting other forms of energy into mechanical vibration, and is mainly used to provide vibration effect for devices requiring vibration, such as game consoles, mobile phones and tablets.

[0003] The vibration motor mainly comprises a shell, a stator, a rotor and an elastic piece for elastically suspending the rotor in the shell; wherein the stator is fixedly connected with the shell for driving the rotor to vibrate.

[0004] The shell in the related art comprises a bottom plate and an upper cover arranged on the bottom plate, the stator mainly comprises a coil, and some stators are designed with a core and the coil is arranged on the outer circumferential side of the core, and the rotor comprises two magnetic steels which are spaced apart from each other and located on opposite sides of the coil, and the two magnetic steels are arranged to be spaced apart from the coil, so that the rotor can vibrate. This way of designing the magnetic steels on opposite sides of the coil only has two sides of the magnetic field available, and the magnetic field is divergent, which leads to low utilization rate of the magnetic field of the magnetic steels, and the driving force of the stator for driving the rotor to vibrate is also reduced.

[0005] Therefore, it is necessary to provide a new vibration motor to solve the above technical problems. SUMMARY

[0006] The present application aims to provide a new vibration motor to solve the problem of low utilization rate of the magnetic field of the magnetic steels in the vibration motor in the related art, which is caused by the way of designing the magnetic steels on opposite sides of the coil.

[0007] The present application provides a vibration motor, which comprises a shell, a stator and a rotor which are spaced apart and accommodated in the shell, and an elastic piece for elastically suspending the rotor in the shell; the stator is fixed to the shell and is used to drive the rotor to vibrate in a first direction.

[0008] The stator comprises a coil fixed in the shell; the mover comprises two first magnetic steels distributed on opposite sides of the coil and a second magnetic steel located on the same side of the two first magnetic steels, the two first magnetic steels and the second magnetic steel are arranged at intervals along the winding direction of the coil and are arranged at intervals with the stator; the magnetization direction of the first magnetic steel is a second direction perpendicular to the first direction, the magnetization direction of the second magnetic steel is a third direction perpendicular to the first direction and the second direction; the first magnetic steel has a first magnetic zone, the second magnetic steel has a second magnetic zone adjacent to the first magnetic zone, the magnetic pole of the first magnetic zone close to one side of the coil and the magnetic pole of the second magnetic zone close to one side of the coil are the same magnetic pole; the stator at least partially extends between the two first magnetic steels.

[0009] Preferably, the second magnetic steel is a single-pole magnetic steel, and the second magnetic steel has one second magnetic zone;

[0010] The first magnetic steel is a single-pole magnetic steel, and the first magnetic steel has one first magnetic zone; or,

[0011] The first magnetic steel is a multi-pole magnetic steel, and the first magnetic steel has a plurality of first magnetic zones arranged at intervals along the first direction, one of the first magnetic zones is adjacent to the second magnetic zone, and the same side magnetic poles of two adjacent first magnetic zones are different magnetic poles.

[0012] Preferably, the first magnetic steel is a three-pole magnetic steel, and the first magnetic steel has three first magnetic zones, and the middle first magnetic zone is adjacent to the second magnetic zone.

[0013] Preferably, the first magnetic steel and the second magnetic steel are both multi-pole magnetic steels; the first magnetic steel has a plurality of first magnetic zones arranged at intervals along the first direction, the same side magnetic poles of two adjacent first magnetic zones are different magnetic poles; the second magnetic steel has a plurality of second magnetic zones arranged at intervals along the first direction, the same side magnetic poles of two adjacent second magnetic zones are different magnetic poles; the number of first magnetic zones is equal to or greater than the number of second magnetic zones, and each second magnetic zone is adjacent to one first magnetic zone.

[0014] Preferably, the first magnetic steel is a three-pole magnetic steel, and the first magnetic steel has three first magnetic zones; the second magnetic steel is a three-pole magnetic steel, and the second magnetic steel has three second magnetic zones.

[0015] Preferably, the first magnetic steel is a one-piece magnetic steel structure or a multi-segment magnetic steel structure having a plurality of first magnetic zones; the second magnetic steel is a one-piece magnetic steel structure or a multi-segment magnetic steel structure having a plurality of second magnetic zones.

[0016] Preferably, each of the first magnets includes sub-magnets and pole cores stacked sequentially along the second direction, wherein the sub-magnets are closer to the coil than the pole cores.

[0017] Preferably, the vibration motor further includes welding plates fixed to two opposite inner sides of the housing along the second direction.

[0018] Preferably, the stator further includes an iron core fixed inside the housing; the coil is wound around the outer periphery of the iron core and spaced apart from the housing.

[0019] Preferably, the mover further includes a mass block, the mass block having an inwardly recessed receiving groove on the side near the stator; the stator at least partially extends into the receiving groove and is spaced apart from the mass block, the first magnet and the second magnet are respectively fixed in the receiving groove; the elastic member elastically suspends the mass block within the housing.

[0020] Compared with related technologies, the vibration motor of the present invention provides two first magnets and one second magnet on three adjacent sides of the coil, defines the magnetization direction of the first and second magnets, and defines the magnetic poles of the first magnetic region near the coil and the magnetic poles of the second magnetic region near the coil as the same magnetic pole. At the same time, the stator extends at least partially between the two first magnets, so that the magnetic steel structure has a magnetic field available on three sides and the magnetic field is concentrated in the coil. This not only improves the magnetic field utilization rate of the magnetic steel structure, but also increases the driving force of the stator to drive the vibration of the mover. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 A three-dimensional structural schematic diagram of the first type of vibration motor provided in an embodiment of the present invention;

[0023] Figure 2 This is a partial exploded view of the structure of the first type of vibration motor provided in an embodiment of the present invention;

[0024] Figure 3 For along Figure 1 Cross-sectional view of line AA in the middle;

[0025] Figure 4 This is a planar schematic diagram of the first type of vibration motor provided in this embodiment of the invention after removing the base plate, coil, iron core, and flexible circuit board;

[0026] Figure 5 A first magnetic pole schematic diagram of a first magnetic steel and a second magnetic steel in a first vibrating motor provided by the embodiment of the present application;

[0027] Figure 6 A magnetic field cloud diagram of a vibrating motor in the related art;

[0028] Figure 7 A magnetic field cloud diagram of a first vibrating motor provided by the embodiment of the present application;

[0029] Figure 8 A partial structure exploded schematic diagram of a second vibrating motor provided by the embodiment of the present application

[0030] Figure 9 A first magnetic pole schematic diagram of a first magnetic steel and a second magnetic steel in a second vibrating motor provided by the embodiment of the present application;

[0031] Figure 10 A first magnetic pole schematic diagram of a first magnetic steel and a second magnetic steel in a second vibrating motor provided by the embodiment of the present application.

[0032] Wherein, 100, a vibrating motor; 1, a shell; 11, a bottom plate; 12, an upper cover; 13, a containing space; 2, a stator; 21, a coil; 22, an iron core; 3, a mover; 31, a first magnetic steel; 310, a first magnetic area; 311, a sub magnetic steel; 312, a pole core; 32, a second magnetic steel; 320, a second magnetic area; 33, a mass block; 331, a receiving groove; 4, an elastic piece; 41, a first fixed arm; 42, a second fixed arm; 43, a spring arm; 5, an elastic damping piece; 6, a flexible circuit board; 7, a soldering sheet. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Embodiment one

[0035] The embodiment of the present application provides a vibrating motor 100, which combines Figures 1 to 5 as shown, which comprises a shell 1, a stator 2 and a mover 3 which are spaced and contained in the shell 1, and an elastic piece 4 which elastically suspends the mover 3 in the shell 1; the stator 2 is fixed to the shell 1 and is used to drive the mover 3 to vibrate in a first direction.

[0036] The housing 1 includes a base plate 11 and an upper cover 12 that covers the base plate 11 and together with the base plate 11 forms an accommodating space 13; the stator 2, the mover 3 and the elastic element 4 are all housed in the accommodating space 13, the coil 21 is fixed to the base plate 11, and the elastic element 4 is fixed to the opposite sides of the upper cover 12.

[0037] The stator 2 is rectangular and includes a coil 21 fixed inside the housing 1.

[0038] The mover 3 includes two first magnets 31 distributed on opposite sides of the coil 21 and a second magnet 32 ​​located on the same side of the two first magnets 31. The two first magnets 31 and the second magnet 32 ​​are arranged at intervals along the winding direction of the coil 21 and are all spaced apart from the stator 2.

[0039] The magnetization direction of the first magnet 31 is a second direction perpendicular to the first direction, and the magnetization direction of the second magnet 32 ​​is a third direction, which is perpendicular to both the first and second directions. Figure 2 As shown, the first direction is the X-axis, the second direction is the Y-axis, and the third direction is the Z-axis.

[0040] like Figure 5 As shown, the first magnet 31 has a first magnetic region 310, and the second magnet 32 ​​has a second magnetic region 320 adjacent to the first magnetic region 310. The magnetic poles of the first magnetic region 310 and the second magnetic region 320 near the coil 21 are the same, that is, the magnetic poles of each first magnetic region 310 and each adjacent second magnetic region 320 near the coil 21 are either both N poles or both S poles. The stator 2 extends at least partially between the two first magnets 31. A magnetic region is the area or magnetic field region formed by the N poles and S poles on both sides of the same position of the magnet.

[0041] Both the first magnet 31 and the second magnet 32 ​​are multipole magnets; the first magnet 31 has a plurality of first magnetic regions 310 arranged at intervals along a first direction, and the magnetic poles on the same side of two adjacent first magnetic regions 310 are opposite magnetic poles; the second magnet 32 ​​has a plurality of second magnetic regions 320 arranged at intervals along the first direction, and the magnetic poles on the same side of two adjacent second magnetic regions 320 are opposite magnetic poles; the number of first magnetic regions 310 is equal to or greater than the number of second magnetic regions 320, and each second magnetic region 320 is adjacent to a first magnetic region 310.

[0042] Multipole magnets are magnets with multiple identical N poles and S poles, or magnets with multiple magnetic regions.

[0043] At this time, the first magnet 31 is an integral magnet structure or a multi-segment magnet structure with multiple first magnetic regions 310, that is, it has a multi-segment magnetization function; the second magnet 32 ​​is an integral magnet structure or a multi-segment magnet structure with multiple second magnetic regions 320, that is, it has a multi-segment magnetization function.

[0044] In this embodiment, the first magnetic steel 31 is a three-pole magnetic steel, and the first magnetic steel 31 has three first magnetic zones 310; the second magnetic steel 32 is a three-pole magnetic steel, and the second magnetic steel 32 has three second magnetic zones 320.

[0045] The two first magnetic steels 31 are arranged in opposition.

[0046] Each first magnetic steel 31 includes a sub-magnetic steel 311 and a pole core 312 stacked in sequence along the second direction, and the sub-magnetic steel 311 is closer to the coil 21 relative to the pole core 312; that is, any one first magnetic steel 31 includes a sub-magnetic steel 311 and a pole core 312 stacked in sequence along the vibration direction perpendicular to the mover 3, so that the magnetic field of the first magnetic steel 31 can be improved by the sub-magnetic steel 311 and the pole core 312. Of course, according to actual needs, the first magnetic steel 31 can also adopt an integrated magnetic steel structure without the pole core 312.

[0047] The end of each first magnetic steel 31 and second magnetic steel 32 is provided with a magnetic conductive material, so that the magnetic lines of force at the end of the first magnetic steel 31 and the second magnetic steel 32 circulate more, thereby causing the magnetic field to be stronger than other places.

[0048] The stator 2 further includes an iron core 22 fixed to the bottom plate 11 of the shell 1; the coil 21 is arranged on the outer circumferential side of the iron core 22 and is spaced apart from the shell 1, and the iron core 22 is fixed to the bottom plate 11 of the shell 1.

[0049] The mover 3 further includes a mass block 33, and the side of the mass block 33 close to the stator 2 is provided with an inwardly recessed accommodation groove 331; the stator 2 at least partially extends into the accommodation groove 331 and is spaced apart from the mass block 33, and the first magnetic steel 31 and the second magnetic steel 32 are respectively fixed in the accommodation groove 331; and the elastic member 4 elastically suspends the mass block 33 on the upper cover 12 of the shell 1. This design not only improves the vibration effect of the mover 3 through the weight of the mass block 33, but also reduces the overall size of the vibration motor 100 through the design of the accommodation groove 331.

[0050] The mass block 33 is rectangular; the elastic member 4 includes two and is respectively fixed to the opposite sides of the mass block 33 along the vibration direction of the mover 3 and elastically suspends the first magnetic steel 31 and the second magnetic steel 32 on the upper cover 12 of the shell 1; each elastic member 4 includes a first fixed arm 41 fixed to one side of the shell 1, a second fixed arm 42 fixed to the side of the mass block 33 away from the first fixed arm 41, and a spring arm 43 bent and extended from the first fixed arm 41 to the second fixed arm 42 and fixedly connected with the second fixed arm 42; and the two elastic members 4 are centrally symmetrically arranged. This design can more stably elastically suspend the mover 3 in the shell 1 by the elastic member 4.

[0051] As shown in FIG. 1, the vibration motor 100 includes a shell 1, a stator 2, a mover 3, and an elastic member 4. Figure 4As shown, the vibration motor 100 also includes welding plates 7 fixed to the two opposite inner sides of the upper cover 12 of the housing 1 along the second direction. This design can thicken or raise this part of the housing 1 to prevent the mover 3 from colliding with the housing 1 and rotating during a fall. Each welding plate 7 is spaced apart and directly opposite the second fixed arm 42.

[0052] The vibration motor 100 also includes an elastic damping element 5 fixed between the spring arm 43 and the mass block 33; the elastic damping element 5 includes two elements and is distributed at intervals on opposite sides of the mass block 33 along the vibration direction perpendicular to the mover 3; the elastic damping element 5 can be any one of foam, spring, and spring sheet. This design prevents the mover 3 from directly impacting the housing 1 during vibration, thus avoiding the possibility of damage to the vibration motor 100.

[0053] The vibration motor 100 also includes a flexible circuit board 6 fixed inside the housing 1 and extending outside the housing 1; the coil 21 is electrically connected to the flexible circuit board 6, and the flexible circuit board 6 is fixed to the base plate 11 of the housing 1.

[0054] like Figure 6 As shown, the related technology uses magnets designed on opposite sides of the coil, which only provides a usable magnetic field on two sides, and the magnetic field is divergent and escapes from the sides, resulting in low magnetic field utilization of the magnets; for example... Figure 7 As shown, the vibration motor 100 in this embodiment not only designs first magnets 31 on both sides of the coil 21, but also designs a second magnet 32 ​​on the side directly opposite the fixed surface of the coil 21. At the same time, the magnetic poles of the first magnetic region 310 near the coil 21 and the magnetic poles of the second magnetic region 320 near the coil 21 are the same. In this way, the magnetic field can be concentrated at the position of the coil 21, thereby improving the magnetic field utilization rate of the magnet structure.

[0055] Compared with related technologies, the vibration motor 100 in this embodiment provides two first magnets 31 and one second magnet 32 ​​on three adjacent sides of the coil 21, defines the magnetization direction of the first magnets 31 and the second magnets 32, and defines the magnetic poles of the first magnetic region 310 near the coil 21 and the magnetic poles of the second magnetic region 320 near the coil 21 as having the same magnetic poles. At the same time, the stator 2 extends at least partially between the two first magnets 31, so that the magnet structure can have a magnetic field available on three sides and the magnetic field is concentrated in the coil 21. This not only improves the magnetic field utilization rate of the magnet structure, but also increases the driving force of the stator 2 to drive the vibrator 3 to vibrate.

[0056] Example 2

[0057] Unlike Example 1, in combination Figure 8 and Figure 9As shown, the second magnetic steel 32 is a single-pole magnetic steel, and has one second magnetic zone 320; the first magnetic steel 31 is a multi-pole magnetic steel, and has a plurality of first magnetic zones 310 arranged at intervals along the first direction, one of which is adjacent to the second magnetic zone 320, and the same-side magnetic poles of two adjacent first magnetic zones 310 are different magnetic poles.

[0058] Of course, according to actual needs, for example, Figure 10 As shown, the first magnetic steel 31 can also be a single-pole magnetic steel, and has one first magnetic zone 310.

[0059] The technical effects achieved by the embodiment are the same as those achieved by the first embodiment, and will not be repeated here.

[0060] The above is only an embodiment of the present application, and it should be pointed out that, for those skilled in the art, without departing from the inventive concept, improvements can be made, but these all belong to the protection scope of the present application.

Claims

1. A vibrating motor comprising a housing, a stator and a rotor spaced apart and accommodated in the housing, and an elastic member elastically suspending the rotor in the housing; the stator is fixed to the housing and used to drive the rotor to vibrate in a first direction; characterized in that, the stator comprises a coil fixed in the housing; the rotor comprises two first magnetic steels distributed on opposite sides of the coil and a second magnetic steel located on the same side of the two first magnetic steels, the two first magnetic steels and the second magnetic steel are spaced apart from the stator along the winding direction of the coil; the magnetization direction of the first magnetic steel is a second direction perpendicular to the first direction, the magnetization direction of the second magnetic steel is a third direction perpendicular to the first direction and the second direction respectively; the first magnetic steel has a first magnetic zone, the second magnetic steel has a second magnetic zone adjacent to the first magnetic zone, the magnetic pole of the first magnetic zone close to one side of the coil and the magnetic pole of the second magnetic zone close to one side of the coil are the same magnetic pole; the stator at least partially extends between the two first magnetic steels.

2. The vibrating motor of claim 1, wherein The second magnetic steel is a single-pole magnetic steel, and the second magnetic steel has one second magnetic zone; The first magnetic steel is a single-pole magnetic steel, and the first magnetic steel has one first magnetic zone; or, The first magnetic steel is a multi-pole magnetic steel, and the first magnetic steel has a plurality of first magnetic zones spaced apart along the first direction, one of the first magnetic zones is adjacent to the second magnetic zone, and the same side magnetic poles of two adjacent first magnetic zones are different magnetic poles.

3. The vibrating motor of claim 2, wherein The first magnetic steel is a three-pole magnetic steel, and the first magnetic steel has three first magnetic zones, and the middle first magnetic zone is adjacent to the second magnetic zone.

4. The vibrating motor of claim 1, wherein The first magnetic steel and the second magnetic steel are both multi-pole magnetic steels; the first magnetic steel has a plurality of first magnetic zones spaced apart along the first direction, the same side magnetic poles of two adjacent first magnetic zones are different magnetic poles; the second magnetic steel has a plurality of second magnetic zones spaced apart along the first direction, the same side magnetic poles of two adjacent second magnetic zones are different magnetic poles; the number of first magnetic zones is equal to or greater than the number of second magnetic zones, and each second magnetic zone is adjacent to one first magnetic zone.

5. The vibrating motor of claim 4, wherein The first magnetic steel is a three-pole magnetic steel, and the first magnetic steel has three first magnetic zones; the second magnetic steel is a three-pole magnetic steel, and the second magnetic steel has three second magnetic zones.

6. The vibrating motor of claim 4, wherein The first magnetic steel is a one-piece magnetic steel structure or a multi-segment magnetic steel structure having a plurality of first magnetic zones; the second magnetic steel is a one-piece magnetic steel structure or a multi-segment magnetic steel structure having a plurality of second magnetic zones.

7. The vibrating motor of claim 1, wherein Each first magnetic steel comprises a sub-magnetic steel and a pole core stacked in the second direction in sequence, and the sub-magnetic steel is closer to the coil than the pole core.

8. The vibrating motor of claim 1, wherein The vibrating motor further comprises soldering pieces fixed to opposite inner sides of the housing in the second direction respectively.

9. The vibrating motor of claim 1, wherein The stator further comprises an iron core fixed in the housing; the coil is wound on the outer circumferential side of the iron core and spaced apart from the housing.

10. The vibrating motor of claim 1, wherein The mover further comprises a mass block, which is provided with an inwardly recessed accommodating groove near one side of the stator; the stator is at least partially extended into the accommodating groove and is arranged in a spaced manner with the mass block, and the first magnetic steel and the second magnetic steel are fixed in the accommodating groove respectively; and the elastic member elastically suspends the mass block in the shell.

Images