CN217935409U - Large-amplitude linear vibration motor - Google Patents

Abstract

The utility model discloses a large-amplitude linear vibration motor, which comprises a shell, a stator component and a vibrator component, wherein the stator component is fixed in the shell, the vibrator component is movably arranged on one side in the shell, and the vibrator component generates vibration through the mutual magnetic action with the stator component; the other side in the shell is provided with a damping pad, and the vibrator assembly is buffered by the damping pad when vibrating in the shell; stator module includes the coil, and the coil is fixed in the casing, and the vibrator subassembly includes annular magnetic part, and annular magnetic part activity sets up in the casing, and annular magnetic part sets up in the coil outside. The damping cushion is arranged on the other side, opposite to the stator assembly and the vibrator assembly mounting side, in the linear vibration motor shell, so that the vibrator assembly is prevented from generating hard collision with the shell when vibrating in the shell, and the service life of the linear vibration motor is prolonged. The annular magnetic part is arranged on the outer side of the coil, so that the amplitude of the linear vibration motor is improved, and the touch experience of the electronic equipment provided with the linear vibration motor during use is optimized.

Description

Large-amplitude linear vibration motor

Technical Field

The utility model relates to the technical field of motors, concretely relates to large-amplitude linear vibration motor.

Background

The linear vibration motor is an indispensable component of electronic products such as intelligent wearing, game paddle, cell-phone, panel computer, palm game machine, and it provides tactile feedback for the user to can provide better use experience for the user, also strengthen the market competitiveness of product from this. The linear motor generally includes an oscillator and a stator, and generates vibration by an interaction force between the oscillator and the stator, thereby providing linear vibration. The vibrator of the linear vibration motor generally employs a magnet or a magnetic steel, and the stator of the linear vibration motor generally employs an energized coil, so that vibration is generated by interaction of electromagnetic force generated by energizing the coil and magnetic force of the magnet or the magnetic steel. The existing linear vibration motor generally arranges the magnet or the magnetic steel of the vibrator inside the coil of the stator, the shape and the size of the magnet or the magnetic steel of the vibrator with the structure are limited, the size of the generated magnetic force is limited, the vibration amplitude generated by the interaction of the magnetic force generated by electrifying the coil and the magnetic force of the magnet or the magnetic steel is small, and the use requirement of the linear vibration motor can not be met. In addition, the vibrator of the conventional linear vibration motor is likely to collide with the housing of the linear vibration motor when vibrating, thereby affecting the service life of the linear vibration motor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be to the amplitude that present linear vibration motor structure produced can not satisfy linear vibration motor's user demand to and the technical problem that the vibrator vibration influences linear vibration motor life, provide the linear vibration motor of big amplitude that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a large-amplitude linear vibration motor comprises a shell, a stator assembly and a vibrator assembly, wherein the stator assembly is fixed in the shell, the vibrator assembly is movably arranged on one side in the shell, and the vibrator assembly generates vibration through the mutual magnetic force action between the vibrator assembly and the stator assembly; the other side in the shell is provided with a damping pad, and the vibrator assembly is buffered by the damping pad when vibrating in the shell; the stator assembly comprises a coil, the coil is fixed in the shell, the vibrator assembly comprises an annular magnetic part, the annular magnetic part is movably arranged in the shell, and the annular magnetic part is arranged on the outer side of the coil.

Further, the height value of the coil is smaller than that of the annular magnetic member.

Furthermore, the height value of the coil is smaller than two thirds of the height value of the annular magnetic part, the damping pad is made of a copper sheet, and the annular magnetic part is magnetic steel.

Further, the vibrator subassembly still includes spring and ring oscillator, the ring oscillator sets up in the annular magnetic part outside, annular magnetic part and ring oscillator pass through the spring mounting in the casing.

Furthermore, the vibrator subassembly still includes annular yoke, annular magnetic part is fixed in annular yoke, the annular vibrator is fixed outside annular yoke, annular yoke fixes on the spring.

Further, the two sides of the spring are of a plane annular structure, one side of the spring is attached to the lower side of the annular magnet yoke, and the other side of the spring is attached to the inner side of the shell.

Further, the stator assembly further comprises an FPCB connecting piece, wherein the FPCB connecting piece is led out from the inside of the shell to the outside of the shell and is fixed on one side in the shell; the coil is fixed on the FPCB connecting piece.

Further, stator module still includes the iron core, the iron core is fixed at the coil inboard.

Further, the shell comprises a bottom shell and an upper shell, the stator assembly is fixed on the bottom shell, and the vibrator assembly is movably arranged on the bottom shell.

Further, be provided with the fixed slot in the drain pan, fixed slot and FPCB connecting piece looks adaptation, the FPCB connecting piece is fixed in the fixed slot.

The utility model discloses the beneficial effect who realizes mainly has following several: the other side, opposite to the mounting side of the stator assembly and the vibrator assembly, of the shell is provided with the damping cushion, the vibrator assembly is protected through damping cushion damping when vibrating in the shell, hard collision between the vibrator assembly and the shell when vibrating in the shell is avoided, and the vibration of the vibrator assembly and the shell can be buffered through damping of the damping cushion even if the vibrator assembly and the shell collide with each other, so that the linear vibration motor can be protected from being damaged, and the service life of the linear vibration motor is prolonged; and the damping pad is a solid pad-shaped structure, is little influenced by temperature change, has good buffering effect and long service life, thereby further prolonging the service life of the linear vibration motor. The annular magnetic part of the vibrator component is arranged on the outer side of the coil of the stator component, and therefore the annular magnetic part is contained in the coil outside and in the shell, the annular magnetic part can be arranged greatly, the magnetic field intensity of the annular magnetic part is increased, the magnetic force between the stator component and the vibrator component is increased, the amplitude of the linear vibration motor is further improved, and the touch experience during use of electronic equipment for installing the linear vibration motor is optimized.

Drawings

Fig. 1 is a schematic structural diagram of an entire large-amplitude linear vibration motor according to an embodiment of the present invention;

fig. 2 is a schematic longitudinal sectional structure diagram of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an upper case of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an annular magnetic member of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a spring of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a ring vibrator of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an annular yoke of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram illustrating a stator assembly of a large amplitude linear vibration motor according to an embodiment of the present invention mounted on a bottom case;

fig. 10 is a schematic structural diagram of a bottom case of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a coil of a large amplitude linear vibration motor according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an iron core of a large amplitude linear vibration motor according to an embodiment of the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 12, a large-amplitude linear vibration motor is used in electronic products such as smart wear, game pads, mobile phones, tablet computers, and handheld game machines, and can generate vibration to remind a user when the electronic products are used, so as to enhance the tactile experience of the user. The large-amplitude linear vibration motor comprises a shell 1, a stator assembly 2 and a vibrator assembly 3, wherein the shell 1 is fixedly provided with the stator assembly 2 and the vibrator assembly 3, the stator assembly 2 and the vibrator assembly 3 are both arranged in the shell 1, so that a whole linear vibration motor is formed, and the linear vibration motor is conveniently arranged on electronic products such as an intelligent wearable device, a game handle, a mobile phone, a tablet personal computer and a handheld game console. The stator assembly 2 is fixed in the shell 1, the vibrator assembly 3 is movably arranged on one side in the shell 1, mutual magnetic force action can be generated between the stator assembly 2 and the vibrator assembly 3, and the vibrator assembly 3 reciprocates in the shell 1 through the mutual magnetic force action between the vibrator assembly 3 and the stator assembly 2, so that vibration is generated, and the vibration function of the linear vibration motor is realized. The linear vibration motor is generally set to be a cylindrical structure, the housing 1 is a cylindrical housing, the stator assembly 2 is a cylindrical structure, and the vibrator assembly 3 is a circular structure.

Referring to fig. 2, a damping pad 13 is disposed on the other side of the housing 1 opposite to the mounting side of the stator assembly 2 and the vibrator assembly 3, and the vibrator assembly 3 is protected by the damping pad 13 in a damping manner when vibrating in the housing 1, so that the vibrator assembly 3 is prevented from generating hard collision with the housing 1 when vibrating in the housing 1, and even if the vibrator assembly 3 collides with the housing 1, the damping pad 13 can damp and buffer the hard collision, thereby protecting the linear vibration motor from being damaged and prolonging the service life of the linear vibration motor; and the damping pad 13 is a solid pad-shaped structure, is little affected by temperature change, has good buffering effect and long service life, thereby further prolonging the service life of the linear vibration motor. The damping cushion 13 can adopt a common soft cushion structure, and the damping cushion 13 in the embodiment adopts a damping cushion made of copper sheets, so that the damping effect is good, and the assembly is convenient; the damping pad 13 may also be made of sponge, rubber, or induction coil.

Referring to fig. 2 and 3, the stator assembly 2 includes a coil 21, the coil 21 is fixed in the housing 1, the vibrator assembly 3 includes an annular magnetic member 31, the annular magnetic member 31 is movably disposed in the housing 1, and the annular magnetic member 31 is disposed outside the coil 21, so that there is a sufficient position in a space outside the coil 21 and inside the housing 1 to accommodate the annular magnetic member 31, and the annular magnetic member 31 can be set to be larger to increase the magnetic field strength of the annular magnetic member 31, thereby increasing the magnetic force between the stator assembly 2 and the vibrator assembly 3, further improving the amplitude of the linear vibration motor, and optimizing the tactile experience when the electronic device in which the linear vibration motor is installed is used. The annular magnetic member 31 is preferably made of magnetic steel with strong magnetism.

Referring to fig. 2, as a further preferred scheme, the height value of the coil 21 is preferably set to be smaller than the height value of the annular magnetic member 31, so that the coil 21 is completely located inside the annular magnetic member 31 when being installed, and thus the magnetic field generated when the coil 21 is energized can fully act on the annular magnetic member 31 to generate magnetic force, fully convert the electric energy into the kinetic energy of the linear vibration motor, and reduce the energy consumption of the linear vibration motor; the height value of the coil 21 may be set to be less than two-thirds of the height value of the annular magnetic member 31 so that the coil 21 is always inside the annular magnetic member 31 when the vibrator assembly 3 vibrates inside the casing 1.

Referring to fig. 1 to 12, in the production of the large-amplitude linear vibration motor of the present embodiment, the housing 1, the stator assembly 2, and the vibrator assembly 3 are produced first, the damping pad 13 is produced simultaneously in the production of the housing 1, and the damping pad 13 is adhered and fixed to the side of the housing 1 fixed with respect to the stator assembly 2 and the vibrator assembly 3; the stator assembly 2 includes a coil 21, and the vibrator assembly 3 includes a ring-shaped magnetic member 31. When the large amplitude linear vibration motor is assembled, the stator assembly 2 is fixed in the housing 1, the vibrator assembly 3 is movably mounted in the housing 1, and the annular magnetic member 31 of the vibrator assembly 3 is mounted outside the coil 21 of the stator assembly 2. When the large-amplitude linear vibration motor works, a mutual magnetic force action is generated between a magnetic field generated by electrifying the coil 21 and changing and a fixed magnetic field generated by the annular magnetic part 31, so that the vibrator assembly 3 vibrates in the shell 1 to realize the vibration function of the linear vibration motor.

Example two

Referring to fig. 1 to 12, the overall structure of the large-amplitude linear vibration motor of the present embodiment is the same as that of the first embodiment, and the structures of the stator assembly 2 and the vibrator assembly 3 are improved on the basis of the first embodiment to optimize the linear vibration motor. The present embodiment is the same as the first embodiment, and further modifications will be described below with reference to the first embodiment.

Referring to fig. 2, 3, and 5 to 8, the vibrator assembly 3 further includes a spring 32 and a ring vibrator 33, the ring vibrator 33 is disposed outside the ring-shaped magnetic member 31, and the ring-shaped magnetic member 31 and the ring vibrator 33 are installed in the case 1 through the spring 32. Therefore, the mass of the vibrator assembly 3 and the kinetic energy during vibration are increased, the kinetic energy of the vibration of the linear vibration motor is increased, and the tactile experience brought to a user during the vibration work of the linear vibration motor is enhanced. The spring 32 may be of a conventional spring construction; the ring vibrator 33 is of a heavy-weight ring structure such as a steel block structure. It is preferable that a stepped structure is provided inside the ring oscillator 33, and the ring oscillator 33 is bonded to the ring magnetic member 31 and the ring yoke 34 by dispensing glue on the stepped structure, thereby enhancing stability and reliability of the oscillator unit 3.

Referring to fig. 2, 3, and 5 to 8, the oscillator assembly 3 further includes an annular magnetic yoke 34, a lower side of the annular magnetic yoke 34 is in an annular structure, and a side wall is disposed on an outer side of the annular magnetic yoke 34 to shield a magnetic field generated by the annular magnetic member 31 on an inner side of the annular magnetic yoke 34, so that the magnetic field generated by the annular magnetic member 31 and the magnetic field generated by the coil 21 generate a magnetic force. In addition, the ring-shaped magnetic member 31 and the ring-shaped vibrator 33 may be mounted by a ring-shaped yoke 34, the ring-shaped magnetic member 31 is adhesively fixed inside the ring-shaped yoke 34, the ring-shaped vibrator 33 is welded and fixed outside the ring-shaped yoke 34, and the ring-shaped yoke 34 is welded and fixed to the spring 32. It is preferable that a stepped structure is provided inside the ring oscillator 33, and the ring oscillator 33 is bonded to the ring magnetic member 31 and the ring yoke 34 by dispensing glue on the stepped structure, thereby enhancing stability and reliability of the oscillator unit 3.

Referring to fig. 2 and 6, both sides of the spring 32 are configured to be planar annular structures, one side of the spring 32 is attached to the lower side of the annular magnetic yoke 34, the other side of the spring 32 is attached to the inner side of the housing 1, and both sides of the spring 32 are configured to be planar annular structures, so that the contact area between the spring 32 and the annular magnetic yoke 34 and between the spring 32 and the housing 1 is larger and the mounting is more stable.

Referring to fig. 3, 9-12, the stator assembly 2 further includes an FPCB connector 22, where the FPCB connector 22 is led out from the inside of the casing 1 to the outside of the casing 1 and fixed at one side inside the casing 1, so that the coil 21 can be fixedly mounted through the FPCB connector 22, and the coil 21 inside the casing 1 can be electrically connected to an external power source through a line on the FPCB connector 22. The FPCB connector 22 is provided with a pad for soldering the coil 21 and an electric wire of an external power source.

Referring to fig. 3, 9 to 12, the stator assembly 2 further includes an iron core 23, the iron core 23 is adhered and fixed to the inner side of the coil 21, and the iron core 23 enhances a magnetic field generated when the coil 21 is energized, thereby increasing a magnetic force between the stator assembly 2 and the vibrator assembly 3, and further improving an amplitude of the linear vibration motor.

Referring to fig. 1 to 12, in the production of the large-amplitude linear vibration motor of the present embodiment, the housing 1, the stator assembly 2, and the vibrator assembly 3 are produced first, the damping pad 13 is produced simultaneously in the production of the housing 1, and the damping pad 13 is adhered and fixed to the side of the housing 1 fixed with respect to the stator assembly 2 and the vibrator assembly 3; the stator assembly 2 includes a coil 21, an FPCB connector 22, and a core 23, and the vibrator assembly 3 includes a ring-shaped magnetic member 31, a spring 32, a ring-shaped vibrator 33, and a ring-shaped yoke 34. When the large-amplitude linear vibration motor is assembled, the FPCB connecting piece 22 is fixedly bonded in the shell 1, the coil 21 is fixed on the FPCB connecting piece 22 and is communicated with a circuit on the FPCB connecting piece 22, and the iron core 23 is bonded in the coil 21; the ring-shaped magnetic member 31 is bonded to the inside of the ring-shaped yoke 34, the ring-shaped vibrator 33 is welded to the outside of the ring-shaped yoke 34, and the ring-shaped yoke 34 is welded to the inside of the case 1 via the spring 32. The ring-shaped magnetic member 31 of the vibrator assembly 3 is mounted outside the coil 21 of the stator assembly 2 when integrally assembled. When the large-amplitude linear vibration motor works, the coil 21 is electrified to generate a changing magnetic field and a fixed magnetic field generated by the annular magnetic part 31 to generate a mutual magnetic force action, so that the vibrator assembly 3 vibrates in the shell 1 to realize the vibration function of the linear vibration motor.

EXAMPLE III

Referring to fig. 1 to 12, the overall structure of the large-amplitude linear vibration motor of the present embodiment is the same as that of the second embodiment, and the structure of the housing 1 is improved based on the second embodiment, so as to facilitate the installation of the linear vibration motor and improve the reliability of the linear vibration motor.

Referring to fig. 2, 3, 9 and 10, the housing 1 includes a bottom case 11 and an upper case 12, the stator assembly 2 is fixed on the bottom case 11, and the vibrator assembly 3 is movably disposed on the bottom case 11, so that the stator assembly 2 and the vibrator assembly 3 can be firstly mounted on the bottom case 11 and then the bottom case 11 and the upper case 12 are fixed together when the linear vibration motor is assembled, so that the linear vibration motor is more convenient to produce and assemble. The bottom shell 11 and the upper shell 12 of the housing 1 may be made of metal, and the bottom shell 11 and the upper shell 12 may be welded and fixed together by laser welding. The bottom shell 11 is preferably arranged to be a plane structure as a whole, so that the stator assembly 2 and the vibrator assembly 3 are convenient to mount; the upper shell 12 is provided with a cavity structure with an opening at the bottom, and the stator assembly 2 and the vibrator assembly 3 can be accommodated in the cavity structure after being installed with the bottom shell 11; a damping pad 13 is attached to the top inside the upper case 12.

Referring to fig. 9 and 10, the fixing groove 111 is formed in the bottom case 11, and the fixing groove 111 is adapted to the FPCB connector 22, that is, the fixing groove 111 corresponds to the FPCB connector 22 in size, shape and position, so that the FPCB connector 22 can be fixedly mounted in the fixing groove 111, and the FPCB connector 22 and the stator assembly 2 are more stably mounted in the housing 1.

Referring to fig. 1 to 12, in the production of the large-amplitude linear vibration motor of the present embodiment, a housing 1, a stator assembly 2, and a vibrator assembly 3 are first produced, the housing 1 includes a bottom shell 11 and an upper shell 12, a damping pad 13 is produced while the housing 1 is produced, and the damping pad 13 is adhered and fixed to the top of the inner side of the upper shell 12; the stator assembly 2 includes a coil 21, an FPCB connector 22, and a core 23, and the vibrator assembly 3 includes a ring-shaped magnetic member 31, a spring 32, a ring-shaped vibrator 33, and a ring-shaped yoke 34. When the large-amplitude linear vibration motor is assembled, the FPCB connector 22 is bonded and fixed in the fixing groove 111 of the bottom chassis 11, the coil 21 is fixed on the FPCB connector 22 and is communicated with the circuit on the FPCB connector 22, and the iron core 23 is bonded in the coil 21; the ring-shaped magnetic member 31 is bonded inside the ring-shaped yoke 34, the ring-shaped vibrator 33 is welded outside the ring-shaped yoke 34, and the ring-shaped yoke 34 is welded to the bottom case 11 via the spring 32. When the whole assembly is performed, the upper case 12 is welded and fixed to the bottom case 11, and the ring-shaped magnetic member 31 of the vibrator assembly 3 is installed outside the coil 21 of the stator assembly 2. When the large-amplitude linear vibration motor works, a mutual magnetic force action is generated between a magnetic field generated by electrifying the coil 21 and changing and a fixed magnetic field generated by the annular magnetic part 31, so that the vibrator assembly 3 vibrates in the shell 1 to realize the vibration function of the linear vibration motor.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A large amplitude linear vibration motor characterized by: the vibration generator comprises a shell (1), a stator assembly (2) and a vibrator assembly (3), wherein the stator assembly (2) is fixed in the shell (1), the vibrator assembly (3) is movably arranged on one side in the shell (1), and the vibrator assembly (3) generates vibration through mutual magnetic force action with the stator assembly (2); a damping pad (13) is arranged on the other side in the shell (1), and the vibrator assembly (3) is buffered by the damping pad (13) when vibrating in the shell (1); stator module (2) are including coil (21), coil (21) are fixed in casing (1), oscillator subassembly (3) are including annular magnetic part (31), annular magnetic part (31) activity sets up in casing (1), annular magnetic part (31) set up in the coil (21) outside.

2. The large amplitude linear vibration motor according to claim 1, wherein: the height of the coil (21) is smaller than the height of the annular magnetic member (31).

3. The large amplitude linear vibration motor according to claim 2, wherein: the height value of the coil (21) is less than two thirds of the height value of the annular magnetic part (31), the damping pad (13) is made of a copper sheet, and the annular magnetic part (31) is magnetic steel.

4. The large amplitude linear vibration motor according to claim 2, wherein: the vibrator assembly (3) further comprises a spring (32) and a ring vibrator (33), the ring vibrator (33) is arranged on the outer side of the ring-shaped magnetic part (31), and the ring-shaped magnetic part (31) and the ring vibrator (33) are installed in the shell (1) through the spring (32).

5. The large amplitude linear vibration motor according to claim 4, wherein: the vibrator assembly (3) further comprises an annular magnetic yoke (34), the annular magnetic part (31) is fixed in the annular magnetic yoke (34), the annular vibrator (33) is fixed outside the annular magnetic yoke (34), and the annular magnetic yoke (34) is fixed on the spring (32).

6. The large amplitude linear vibration motor according to claim 5, wherein: the two sides of the spring (32) are both plane annular structures, one side of the spring (32) is attached to the lower side of the annular magnetic yoke (34), and the other side of the spring (32) is attached to the inner side of the shell (1).

7. The large amplitude linear vibration motor of claim 6, wherein: the stator assembly (2) further comprises an FPCB connecting piece (22), wherein the FPCB connecting piece (22) is led out from the inside of the shell (1) to the outside of the shell (1) and is fixed on one side in the shell (1); the coil (21) is fixed to the FPCB connection member (22).

8. The large amplitude linear vibration motor according to claim 6, wherein: the stator assembly (2) further comprises an iron core (23), and the iron core (23) is fixed on the inner side of the coil (21).

9. The large amplitude linear vibration motor according to claim 8, wherein: the shell (1) comprises a bottom shell (11) and an upper shell (12), the stator assembly (2) is fixed on the bottom shell (11), and the vibrator assembly (3) is movably arranged on the bottom shell (11).

10. The large amplitude linear vibration motor according to claim 9, wherein: be provided with fixed slot (111) in drain pan (11), fixed slot (111) and FPCB connecting piece (22) looks adaptation, FPCB connecting piece (22) are fixed in fixed slot (111).

Images