CN112187004A

CN112187004A - Broadband motor

Info

Publication number: CN112187004A
Application number: CN202011100762.0A
Authority: CN
Inventors: 曹洪斌; 赵玉洗; 陈娟
Original assignee: Suzhou Suoye Electronic Technology Co ltd
Current assignee: Suzhou Suoye Electronic Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-01-05
Anticipated expiration: 2040-10-15
Also published as: CN112187004B

Abstract

The invention relates to a broadband motor, which comprises a shell, a magnetic component, an elastic mechanism, a mass block and a connecting piece, wherein the shell is provided with a magnetic component; the coil component comprises a plurality of coils, the magnetic component is arranged in the shell, and the plurality of coils surround the periphery of the connecting piece; the magnetic assembly comprises a first magnetic part, a second magnetic part, a third magnetic part, a fourth magnetic part and an internal magnetic part, the connecting part, the mass block, the first magnetic part, the second magnetic part and the internal magnetic part form a vibrator assembly, and the mass block, the first magnetic part, the second magnetic part and the internal magnetic part are connected through the connecting part. The magnetic field of the motor vibrator component provided by the invention is in repulsion with the magnetic field of the motor shell to achieve force balance, so that the vibrator is suspended in the motor, the vibrator component is arranged in the motor shell, repulsion exists in the directions of two ends of the vibrator component, the forces in the directions of the two ends of the vibrator component are balanced, and the polarity of the magnetic field of the structure can be completely reversed.

Description

Broadband motor

Technical Field

The invention relates to the technical field of vibration motors, in particular to a broadband motor.

Background

The vibrating motor of present electronics trade, like the vibrating motor in the cell-phone, the vibrating motor in game paddle and the VR handle generally uses rotor motor or traditional linear motor, and rotor motor vibration effect is single. Although the conventional linear motor can provide a certain vibration effect experience, the response frequency bandwidth is narrow, and the requirement of consumers on wider frequency band vibration effect is difficult to meet. Meanwhile, the traditional linear motor adopts a metal or plastic spring structure, so that the reliability risks of spring breakage, noise and the like exist, the manufacturing difficulty is high, and the cost is high.

Patent document CN207691660U discloses a linear vibration motor, which includes a housing, a stator assembly housed and fixed in the housing, a vibrator assembly, and an elastic support for supporting the vibrator assembly; the stator assembly comprises coils and a flexible circuit board, wherein the coils are respectively arranged on the inner surface of the shell corresponding to the side surfaces of the vibrator assembly; the coil is formed by a plurality of coil wires in a parallel winding mode, and the coil further comprises coil lead wires which correspond to the coil wires and are used for being electrically connected with the flexible circuit board.

Patent document CN107994751A discloses a linear vibration motor. This motor includes the vibrator subassembly, stator module and elastic element, the vibrator subassembly passes through elastic element and is connected with stator module, the vibrator subassembly receives the effect of stator module's electromagnetic force and takes place the vibration, each of two tip along the vibration direction at the vibrator subassembly is provided with magnet, magnet bonds on the vibrator subassembly or magnet is connected with the vibrator subassembly through the mode of moulding plastics, stator module is provided with magnetic element, magnetic element and magnet one-to-one, form the repulsion between magnetic element and the magnet that corresponds.

The motors provided in the above patent documents all use an elastic structure, so that the vibration amount is relatively limited, the frequency bandwidth of the vibration response is also narrow, and the reliability risks such as spring breakage and noise exist, which makes it difficult to meet the needs of consumers.

Patent document US009716423B1 discloses a haptic feedback actuator with a stop, a damper, a hammer path between the stop and the damper, a coil element fixedly mounted with respect to the hammer path; and a magnetic hammer guidingly mounted for movement along the hammer path, the magnetic hammer having two opposing ends, each of the two ends of the magnetic hammer having a corresponding permanent magnet, the two permanent magnets being of opposite polarity, the magnetic hammer being electromagnetically engageable by a magnetic field emitted when the coil element is energized so as to slide longitudinally in either of two opposite directions along the hammer path in accordance with the polarity of the energization of the coil element, the stop having an impact surface adapted to stop the magnetic hammer, and the damper being adapted to decelerate the magnetic hammer as the magnetic hammer slides longitudinally toward the damper.

The above patent documents adopt an asymmetric magnetic field single-face force balance design, emphasis is placed on feedback of the striking effect, and the magnetic hammer needs a larger movement space. Meanwhile, the single-side force balance design can not avoid the quality problems of friction between the magnetic hammer and the inner wall of the movement cavity, noise and the like, and meanwhile, the mechanical spring adopted by part of the design is relatively high in stress, so that the problem of spring fracture is easily caused.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a broadband motor, which can satisfy the requirement of the consumer for the broadband response vibration effect, and at the same time, the vibrator assembly and the elastic mechanism are assembled into a whole, thereby greatly reducing the assembly process difficulty and the manufacturing cost of the linear motor.

A broadband motor comprises a shell, a magnetic assembly, an elastic mechanism, a mass block and a connecting piece; the elastic mechanism comprises a first elastic component and a second elastic component, and the mass block comprises a first mass block and a second mass block; the magnetic connector is characterized by further comprising a coil assembly, wherein the coil assembly comprises a plurality of coils, the magnetic assembly is arranged in the shell, and the plurality of coils surround the periphery of the connector; the magnetic assembly comprises a first magnetic part, a second magnetic part, a third magnetic part, a fourth magnetic part and an internal magnetic part, the connecting part, the mass block, the first magnetic part, the second magnetic part and the internal magnetic part form a vibrator assembly, the mass block, the first magnetic part, the second magnetic part and the internal magnetic part are connected through the connecting part, the first mass block is sleeved on the periphery of one side, away from the internal magnetic part, of the first magnetic part, the second mass block is sleeved on the periphery of one side, away from the internal magnetic part, of the second magnetic part, and a first spring assembly is arranged at one end, away from the first magnetic part, of the first mass block; and a second spring assembly is arranged at one end, far away from the second magnetic piece, of the second mass block.

Preferably, the connecting piece comprises a first connecting piece, a second connecting piece and a connecting rod, and the connecting rod passes through the through holes of the first connecting piece and the second connecting piece; the connecting rod penetrates through a through hole of the internal magnetic part, the internal magnetic part is positioned between the first connecting part and the second connecting part, and the connecting rod penetrates through holes of the first magnetic part and the second magnetic part; the first connecting piece is located between the first magnetic piece and the internal magnetic piece, the second connecting piece is located between the second magnetic piece and the internal magnetic piece, and coils are sleeved on the peripheries of the first connecting piece and the second connecting piece.

Preferably, the first spring assembly and the second spring assembly are provided with through holes or blind holes, and the connecting rod penetrates through the through holes or blind holes of the first spring assembly and the second spring assembly to be connected with the vibrator assembly.

Preferably, the first mass block and the second mass block are provided with through holes, the connecting rod penetrates through the through holes of the first mass block and the second mass block, the first mass block and the second mass block are of hollow structures, the hollow structure of the first mass block is matched with the first magnetic piece, and the hollow structure of the second mass block is matched with the second magnetic piece.

Preferably, the coil support structure is sleeved on the periphery of the coil assembly and is cylindrical.

Preferably, the housing comprises a stator and an end cover, the stator is internally provided with a hollow structure, a vibrator assembly is arranged in the hollow structure, the end cover comprises a left end cover and a right end cover, and the left end cover, the right end cover and the stator form a closed space.

Preferably, the stator is an integrally arranged cylindrical structure, the left end cover is connected with the left end of the cylindrical structure, and the right end cover is connected with the right end of the cylindrical structure.

Preferably, the stator includes two half-cylinder structures, and two half-cylinder structures form the cylinder structure, and the left end lid is connected with the left end of cylinder structure, and the right-hand member lid is connected with the right-hand member of cylinder structure, and wherein left end lid, cylinder structure and right-hand member lid form the enclosure space, the third magnetic component is installed to the left end lid inboard, the fourth magnetic component is installed to the right end lid inboard.

Preferably, the first and second elastic assemblies each comprise a plurality of springs, which are superimposed by ultrasonic welding or by gluing. The elastic assembly provided by the invention separates and overlaps a plurality of springs together, and can form springs with overlapped multi-layer projections but mutually noninterference spaces in the vibration direction of the motor, thereby effectively reducing the stress of each layer of spring, effectively avoiding the problem of spring fracture and improving the reliability of products.

Preferably, the material of the spring is plastic.

The cost is taken as the optimization direction, an optimized structure exists, the shell is made into an integral cylindrical structure, the coil is directly wound on the shell, and the supporting structure of the coil is eliminated, so that the manufacturing cost and the assembly cost of parts can be greatly reduced.

Preferably, the coil can be embedded in the inner surface of the coil supporting structure after being wound, so that the distance between the coil and the magnet is further reduced, and the driving force is improved.

Compared with the prior art, the invention has the following beneficial effects:

(1) the magnetic field of the motor vibrator component provided by the invention is repelled with the magnetic field of the motor end cover to achieve force balance, and the magnetic liquid is used in combination, so that the vibrator is suspended in the motor, the vibrator component is arranged in the motor, repulsive force exists in the directions of two ends, the forces in the directions of the two ends of the vibrator component are balanced, and the polarity of the magnetic field of the structure can be completely reversed. Under certain conditions, the damping characteristic of the plastic spring is utilized, so that the damping requirement of the motor can be met without magnetic liquid, and compared with the motor utilizing the magnetic liquid or other damping materials, the motor made by utilizing the damping characteristic of the plastic spring is better in consistency.

(2) The broadband motor provided by the invention can realize larger driving force and enhance the tactile feedback effect through the structure that a plurality of groups of coils are matched with a multistage ferromagnetic material body.

(3) The third magnetic part and the fourth magnetic part can synchronously adjust the marks of the ferromagnetic materials, the magnetizing strength can be synchronously enhanced or weakened through magnetizing, and can also be adjusted in a differentiation mode, namely the magnetic field strengths of the two sides can be different, the magnetizing strength of the third magnetic part and the magnetizing strength of the fourth magnetic part are determined according to practical application, and the resonant frequency and the vibration effect of a motor can be adjusted; the third magnetic part and the fourth magnetic part which play a damping role on two end surfaces have different ferromagnetic material brands, the magnetizing degrees can be different, the third magnetic part and the fourth magnetic part can be magnetized in a saturated mode to form a force balance magnetic field, the third magnetic part and the fourth magnetic part can be magnetized in a different mode (asymmetrical magnetizing), the initial balance position of the vibrator can be adjusted flexibly through the method, the resonant frequency of the vibration system can be adjusted flexibly, the requirements of different application scenes on different resonant frequencies of the vibration motor can be met, particularly, a customer needs a low resonant frequency point aiming at a game and a VR digital scene, and if the third magnetic part and the fourth magnetic part are magnetized symmetrically, the resonant frequency is not low, so that the problem can be solved through the asymmetrical magnetizing provided by the invention.

(4) The connecting rod provided by the invention sequentially passes through the holes of the first elastic component, the first mass block, the first magnetic part, the first connecting piece, the internal magnetic part, the second connecting piece, the second magnetic part, the second mass block and the second elastic component from left to right, namely, the first elastic component, the first mass block, the first magnetic part, the internal magnetic part, the second mass block and the second elastic component are fixed in series by using a metal rod (connecting rod), so that the manufacturing precision and the reliability of a motor product are improved.

(5) Compared with the prior art, the invention adopts the symmetrical magnetic force field, needs smaller motion space, and mainly aims to provide more uniform vibration quantity response in a wider frequency band range, thereby providing richer and finer tactile feedback for customers. Meanwhile, the vibrator is suspended in the stator inner cavity by the design of surrounding magnetic steel and combining with the magnetic liquid, so that the quality problems of noise and the like caused by friction between the vibrator and the stator inner cavity are avoided.

(6) The invention realizes the flexible adjustment of the vibration system f0 by overlapping a plurality of plastic springs; through the structural design of special plastic spring, increase radial rigidity to with the axle form mounting rigid connection of oscillator, avoid the oscillator to take place the friction with the chamber inner wall of going in the motion process, and through the material characteristic of plastic spring, young modulus is low, characteristics such as the internal stress is little after the shaping, effectively avoids the spring fracture problem, improves product reliability.

The single spring provided by the invention can be manufactured independently, the forming difficulty is small, the shape is better designed, a plurality of springs are overlapped together through processes such as ultrasonic welding or gluing, the parameters such as the distance between the springs are smaller than those of the springs integrally formed, and the space is saved.

Drawings

FIG. 1 is a schematic diagram of an external structure of a broadband motor according to the present invention;

FIG. 2 is a top view of the broadband motor according to the present invention;

FIG. 3 is an exploded view of a broadband motor according to the present invention;

FIG. 4 is a cross-sectional view of a broadband motor according to the present invention;

FIG. 5 is a partial cross-sectional view of the interior of a broadband motor provided by the present invention;

FIG. 6 is a schematic view of the wideband motor according to the present invention;

FIG. 7 is a front view of FIG. 6;

FIG. 8 is another internal structural view of the broadband motor according to the present invention;

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a schematic view of a connector structure provided by the present invention;

FIG. 11 is a schematic structural view of a coil support structure provided by the present invention;

FIG. 12 is a schematic structural diagram of first and second masses provided in the present invention;

fig. 13 is a schematic structural view of the first and second magnetic members according to the present invention;

fig. 14 is a schematic structural view of a third magnetic member and a fourth magnetic member provided in the present invention;

FIG. 15 is a schematic diagram of a coil provided by the present invention;

FIG. 16 is a front view of the spring provided by the present invention;

FIG. 17 is an exploded view of another broadband motor according to the present invention;

FIG. 18 is a schematic view of another wideband motor housing provided in accordance with the present invention;

the reference numbers are as follows:

1. a housing; 2. a coil; 3. a connecting member; 31. a connecting rod; 32. a first connecting member; 33. a second connecting member; 4. a first magnetic member; 5. a second magnetic member; 6. a third magnetic member; 7. a fourth magnetic member; 8. an end cap; 81. a left end cap; 82. a right end cap; 9. an internal magnetic member; 10. a first mass block; 11. a second mass block; 12. a first elastic member; 13. a second elastic member; 14. a coil support structure.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: wide-frequency motor of plastic spring

As shown in fig. 1 to 16, the broadband motor provided by this embodiment includes a coil assembly, the coil assembly includes two coils 2, a housing 1, a magnetic assembly, a connecting member 3, a mass block, and an elastic mechanism, the magnetic assembly is disposed in the housing 1, and the magnetic assembly includes a first magnetic member 4, a second magnetic member 5, a third magnetic member 6, a fourth magnetic member 7, and an internal magnetic member 9.

First magnetism spare 4 and second magnetism spare 5 are located the both sides of inside magnetism spare 16, one side that connecting piece 3 was kept away from to first magnetism spare 4 is provided with third magnetism spare 6, one side that connecting piece 3 was kept away from to second magnetism spare 5 is provided with fourth magnetism spare 7, first magnetism spare 4 and inside magnetism spare repel each other, second magnetism spare 5 and inside magnetism spare repel each other, first magnetism spare 4 and third magnetism spare 6 repel each other, second magnetism spare 5 and fourth magnetism spare 7 repel each other.

Wherein, the shell that this embodiment provided includes stator and end cover 8, the end cover includes left end cover 82 and right end cover 82, the stator includes two half-cylinder structures, and two half-cylinder structures form the cylinder structure, and wherein left end cover, cylinder structure and right end cover form the enclosure space, third magnetic component 6 is installed to left end cover 81 inboard, right end cover 82 inboard installation fourth magnetic component 7.

The stator in this embodiment is a hollow structure, wherein a vibrator assembly is installed in the hollow structure of the stator, and in this embodiment, the connecting member 3, the first magnetic member 4, the second magnetic member 5, the internal magnetic member 9 and the mass block form the vibrator assembly; the mass block comprises a first mass block 10 and a second mass block 11, wherein the first mass block 10 is sleeved on the periphery of one side, far away from the internal magnetic part 9, of the first magnetic part 4, the second mass block 11 is sleeved on the periphery of one side, far away from the internal magnetic part 9, of the second magnetic part 5, and a first spring assembly 12 is arranged at one end, far away from the first magnetic part, of the first mass block; and a second spring assembly 13 is arranged at one end of the second mass 11, which is far away from the second magnetic part 5.

Specifically, the first mass block and the second mass block in this embodiment are hollow structures, the hollow structure of the first mass block is adapted to the first magnetic member, and the hollow structure of the second mass block is adapted to the second magnetic member. The first mass block and the second mass block are cylindrical structures with one ends open, and the first magnetic part and the second magnetic part are respectively assembled in the cylindrical structures from the openings, wherein the first magnetic part and the second magnetic part are cylindrical, the cylindrical structure with one end open of the first mass block is matched with the cylindrical first magnetic part, and the cylindrical structure with one end open of the second mass block is matched with the cylindrical second magnetic part.

In this embodiment, the two coils 2 are sleeved on the periphery of the vibrator assembly, and the first magnetic member 4, the second magnetic member 5, the internal magnetic member, the first mass block and the second mass block are connected through the connecting member 3.

The connecting piece provided by the embodiment comprises a first connecting piece 32, a second connecting piece 33 and a connecting rod 31, wherein the connecting rod penetrates through holes of the first connecting piece and the second connecting piece; the connecting rod provided by the invention sequentially passes through the through holes of the first elastic component 12, the first mass block 10, the first magnetic part 4, the first connecting piece 32, the internal magnetic part 9, the second connecting piece 33, the second magnetic part 5, the second mass block 11 and the second elastic component 13 from left to right, wherein the peripheries of the first connecting piece and the second connecting piece are respectively sleeved with the coils 2, and the connecting rod 31 is a metal rod.

The broadband motor provided in this embodiment further includes a coil support structure 14, wherein the coil support structure 14 provided in this embodiment is sleeved on the periphery of the coil assembly, the coil support structure 14 is cylindrical, and the coil provided in this embodiment is annular and is sleeved on the peripheries of the first connecting piece and the second connecting piece which are disc-shaped.

The first elastic component and the second elastic component provided in this embodiment each include 2 springs, and the 2 springs are welded together by ultrasonic welding to form the first elastic component and the second elastic component. Wherein, the spring is a plastic spring.

The coil provided in the embodiment is of a hollow ring structure, surrounds the peripheries of the first connecting piece and the second connecting piece and is not in contact with the connecting pieces; the material can be a conductor material such as copper wire.

In this embodiment, the first magnetic member 4 and the second magnetic member 5 are the same, both have through holes, and are cylindrical in shape, the third magnetic member 6 and the fourth magnetic member 7 provided by the present invention are the same, and are cylindrical in shape, and the first magnetic member, the second magnetic member, the third magnetic member 6, the fourth magnetic member 7 and the internal magnetic member are all permanent magnets.

Example 2: wide-frequency motor of plastic spring

As shown in fig. 17, the present embodiment is different from embodiment 1 in that: the housing 1 is different; in addition, in the present embodiment, a coil support structure is eliminated, and as shown in fig. 18, in the case of the present embodiment, the case 1 is an integral cylindrical structure, the coil 2 is directly wound on the inside of the case 1, an independent coil support structure is eliminated, and the internal structure of the case is directly set to be capable of supporting the coil; namely, the improvement can greatly reduce the manufacturing cost and the assembly cost of the parts.

The invention realizes the flexible adjustment of the vibration system f0 by overlapping a plurality of plastic springs; through the structural design of special plastic spring, increase radial rigidity to with the axle form mounting rigid connection of oscillator, avoid the oscillator to take place the friction with the chamber inner wall of going in the motion process, and through the material characteristic of plastic spring, young modulus is low, characteristics such as the internal stress is little after the shaping, effectively avoids the spring fracture problem, improves product reliability.

Most importantly, the single spring provided by the invention can be manufactured independently, the forming difficulty is small, the forming is better, a plurality of springs are overlapped together through processes such as ultrasonic welding or gluing, the parameters such as the distance between the springs are smaller than those of the springs formed integrally, and the space is saved.

Those of ordinary skill in the art will understand that: the invention is not to be considered as limited to the specific embodiments thereof, but is to be understood as being modified in all respects, all changes and equivalents that come within the spirit and scope of the invention.

Claims

1. A broadband motor comprises a shell, a magnetic assembly, an elastic mechanism, a mass block and a connecting piece; the elastic mechanism comprises a first elastic component and a second elastic component, and the mass block comprises a first mass block and a second mass block; the magnetic connector is characterized by further comprising a coil assembly, wherein the coil assembly comprises a plurality of coils, the magnetic assembly is arranged in the shell, and the plurality of coils surround the periphery of the connector; the magnetic assembly comprises a first magnetic part, a second magnetic part, a third magnetic part, a fourth magnetic part and an internal magnetic part, the connecting piece, the mass block, the first magnetic part, the second magnetic part and the internal magnetic part form a vibrator assembly, the mass block, the first magnetic part, the second magnetic part and the internal magnetic part are connected through the connecting piece, a first mass block is sleeved on the periphery of one side, away from the internal magnetic part, of the first magnetic part, a second mass block is sleeved on the periphery of one side, away from the internal magnetic part, of the second magnetic part, and a first spring assembly is arranged at one end, away from the first magnetic part, of the first mass block; and a second spring assembly is arranged at one end, far away from the second magnetic piece, of the second mass block.

2. The broadband motor according to claim 1, wherein the connecting member comprises a first connecting member, a second connecting member, and a connecting rod, the connecting rod passing through the through holes of the first connecting member and the second connecting member; the connecting rod penetrates through a through hole of the internal magnetic part, the internal magnetic part is positioned between the first connecting part and the second connecting part, and the connecting rod penetrates through holes of the first magnetic part and the second magnetic part; the first connecting piece is located between the first magnetic piece and the internal magnetic piece, the second connecting piece is located between the second magnetic piece and the internal magnetic piece, and coils are sleeved on the peripheries of the first connecting piece and the second connecting piece.

3. The broadband motor according to claim 2, wherein the first spring assembly and the second spring assembly are provided with through holes or blind holes, and the connecting rod penetrates through the through holes or blind holes of the first spring assembly and the second spring assembly to be connected with the vibrator assembly.

4. The broadband motor according to claim 2, wherein the first mass block and the second mass block are provided with through holes, the connecting rod passes through the through holes of the first mass block and the second mass block, the first mass block and the second mass block are hollow structures, the hollow structure of the first mass block is matched with the first magnetic member, and the hollow structure of the second mass block is matched with the second magnetic member.

5. The broadband motor of claim 1 further comprising a coil support structure disposed about the periphery of the coil assembly, the coil support structure being cylindrical.

6. The broadband motor according to claim 1, wherein the housing comprises a stator and an end cover, the stator is a hollow structure, the hollow structure is provided with a vibrator assembly, the end cover comprises a left end cover and a right end cover, and the left end cover, the right end cover and the stator form a closed space.

7. The broadband motor according to claim 6, wherein the stator is an integral cylindrical structure, the left end cap is connected to the left end of the cylindrical structure, and the right end cap is connected to the right end of the cylindrical structure.

8. The broadband motor according to claim 6, wherein the stator comprises two semi-cylindrical structures, the two semi-cylindrical structures form a cylindrical structure, the left end cover is connected with the left end of the cylindrical structure, the right end cover is connected with the right end of the cylindrical structure, the left end cover, the cylindrical structure and the right end cover form a closed space, the third magnetic assembly is installed on the inner side of the left end cover, and the fourth magnetic assembly is installed on the inner side of the right end cover.

9. The broadband motor of claim 1 wherein the first and second resilient components each comprise a plurality of springs, the plurality of springs being superimposed by ultrasonic welding or by gluing.

10. The broadband motor of claim 9, wherein the spring is made of plastic.