CN218868082U

CN218868082U - Linear vibration motor with electromagnetic damping structure

Info

Publication number: CN218868082U
Application number: CN202223133770.2U
Authority: CN
Inventors: 陈亚明; 梅烨; 张爱明
Original assignee: Sichuan Awa Seimitsu Electric Co ltd
Current assignee: Sichuan Awa Seimitsu Electric Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-14
Anticipated expiration: 2032-11-25

Abstract

The utility model relates to a vibrating motor technical field discloses a linear vibrating motor with electromagnetic damping structure, including shell, support, stator module, oscillator subassembly and elastic component, the shell forms accommodation space with the support lock, and stator module and oscillator subassembly interval set up in accommodation space, and oscillator subassembly suspension in accommodation space and for the reset of oscillator group provide the resilience force are connected to the one end of elastic component, other end connection shell, stator module includes first flexible circuit board, second flexible circuit board and along the vibration direction respectively correspond install in first coil and the second coil that just is parallel arrangement on first and the second flexible circuit board and fix the electromagnetic damping piece on first coil and second coil respectively, the oscillator subassembly suspension is between first coil and second coil, and the electromagnetic damping piece is influenced by the temperature less, and the damping uniformity is high, and the reliability is high, can effectively improve the vibration performance.

Description

Linear vibration motor with electromagnetic damping structure

Technical Field

The utility model relates to a vibrating motor technical field, in particular to linear vibrating motor with electromagnetic damping structure.

Background

With the continuous development of technologies such as intelligent electronic devices including mobile phones and the like, the development of industries of automobiles, medical treatment and household appliances is driven, in order to enhance the experience of users, a vibration motor is used for providing vibration feedback to become a necessary scheme in each touch field, the existing vibration motor on the market has a good touch effect and is a horizontal linear vibration motor, but the damping of the horizontal linear vibration motor is low, and extra damping needs to be added for improving the stability. The existing damping scheme is to use magnetic fluid or foam, the arrangement of the magnetic fluid can increase the viscous damping of the magnetic steel and the coil, and the use of the foam is to increase the structural damping of the system.

However, the damping provided by the magnetic fluid is influenced by the temperature, the viscosity of the magnetic fluid is increased when the temperature is reduced, the system damping is increased, the amplitude of the oscillator is reduced, and the motor cannot normally vibrate; when the temperature rises, the viscosity of the magnetic fluid is reduced, the system damping is reduced, the amplitude of the oscillator is increased, and the internal collision of the motor generates noise, so that the consistency of the damping is poor; and the foam damping is easily influenced by assembly and consistency, and the consistency of the resonant frequency and the damping of the system is poor.

SUMMERY OF THE UTILITY MODEL

The problem that the magnetic fluid leads to the damping uniformity poor for overcoming among the prior art temperature influence and bubble cotton characteristic itself, the utility model discloses a linear vibrating motor. The specific technical scheme is as follows: the utility model provides a linear vibration motor with electromagnetic damping structure, includes shell, support, stator module, vibrator subassembly and elastic component, the shell forms accommodation space with the support lock, and stator module and vibrator subassembly interval set up in accommodation space, and vibrator subassembly, other end connection shell are connected to the one end of elastic component in the accommodation space and for the reset of vibrator subassembly provides the resilience force, a serial communication port, stator module includes first flexible circuit board, second flexible circuit board and along vibration direction respectively correspond install in on first and the second flexible circuit board and be parallel arrangement's first coil and second coil and fix the electromagnetic damping piece on first coil and second coil respectively, the vibrator subassembly suspend in between first coil and the second coil.

Furthermore, the electromagnetic damping sheet is a copper sheet.

Further, the electromagnetic damping fins are respectively disposed between the vibrator assembly and the first and second coils.

Further, the electromagnetic damping fins are respectively disposed between the first and second flexible circuit boards and the first and second coils.

Furthermore, the first flexible circuit board comprises a first coil mounting part, a first connecting part which is vertically bent from one side edge of the first coil mounting part, and an external power supply part which is parallelly extended from the other side edge of the first coil mounting part and extends out of the shell; the second flexible circuit board comprises a second coil mounting part and a second connecting part which is vertically bent with the edge of the second coil mounting part; the external power supply part and the first connecting part are positioned on two sides of the shell, and the first connecting part and the second connecting part are overlapped and welded and fixed on the outer surface of the shell.

Further, the first and second coils are provided in three, respectively.

Further, the first coil installation part and the second coil installation part respectively correspond to the first coil and the second coil and are provided with golden fingers.

Furthermore, a notch is formed in the position, corresponding to the golden finger, of the electromagnetic damping sheet.

Furthermore, the vibrator component comprises a mass block, four magnets embedded in the mass block, and a pole piece welded and fixed on the bottom surface of the mass block and used for supporting the magnets.

The utility model has the advantages that: the electromagnetic damping through setting up receives the temperature influence less, and sets up the electromagnetic damping piece respectively in the upper and lower both sides of vibrator subassembly, produces the damping through electromagnetic damping piece and magnet effect, realizes better damping uniformity, and the reliability is high, can effectively improve linear vibration motor's vibration performance.

Drawings

Fig. 1 is a perspective view of the motor structure of the present invention.

Fig. 2 is an exploded view of the motor structure of the present invention.

Fig. 3 is an exploded view of the stator assembly of the present invention.

Fig. 4 is a sectional view of a motor according to a first embodiment of the present invention.

Fig. 5 is a sectional view of a motor according to a second embodiment of the present invention.

Wherein:

1-a housing; 11-a notch;

2-a scaffold; 21-a support portion;

3-a vibrator assembly; 31-a mass; 32-a magnet; 33-pole piece;

4-a stator assembly; 41-a coil; 411-first coil; 412-a second coil; 42-a flexible circuit board; 421-a first flexible circuit board; 4211-first coil mounting part; 4212-first connection; 4213-external power supply; 4214-through hole; 4215-golden finger;

422-a second flexible circuit board; 4221-a second coil mounting part; 4222-a second connecting part;

5-an elastic member;

6-electromagnetic damping fin; 61-incision;

7-an insulating film.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A linear vibration motor structure with an electromagnetic damping structure is shown in fig. 1 and 2, and is a cuboid structure, and comprises a shell 1, a bracket 2, a vibrator assembly 3, a stator assembly 4 and an elastic piece 5; the shell 1 is a square barrel with an opening (not marked) at one end and comprises a side wall (not marked) and a bottom wall (not marked), the support 2 comprises a body (not marked) corresponding to the shell 1 and a supporting part 21 protruding out of the body and extending, the shell 1 and the support 2 are buckled to form an accommodating space, the stator assembly 4 and the vibrator assembly 3 are arranged in the accommodating space at intervals, and the elasticity of the stator assembly 4 and the vibrator assembly 3 is enhancedOne end of the member 5 is connected to both short side wall surfaces of the vibrator assembly 3, and the other end is connected to the case 1, and the elastic member 5 suspends the vibrator assembly 3 in the receiving space and provides a restoring force for the restoration of the vibrator assembly 3. The vibrator assembly 3 includes a rectangular parallelepiped mass 31, a magnet 32 embedded in the mass 31, and a pole piece 33 welded to a bottom surface of the mass 31 for supporting the magnet 32. The stator assembly 4 is integrally formed

And the coil structure comprises an upper layer coil 41 and a lower layer coil 41 which are arranged in parallel and a flexible circuit board 42 for mounting the coils 41. The side wall edge of the shell 1 is provided with a notch 11 for penetrating the flexible circuit board 42 of the stator assembly 4. The vibrator assembly 3 is suspended between the upper and lower coils 41 at intervals, the number of the coils 41 on each layer is three, four magnets 32 are arranged on the vibrator assembly 3 corresponding to the three coils 41, the thickness of the two magnets in the middle is two times larger than that of the magnets on the two sides, the magnetic poles of the two adjacent magnets are opposite, the four magnets 32 form six effective magnetic induction fields for the vibrator assembly 3 with the three coils 41 on the two sides respectively, and the vibration induction effect of the linear vibration motor is greatly improved.

As shown in fig. 3, the stator assembly 4 has a structure in which the flexible circuit board 42 includes a first flexible circuit board 421, a second flexible circuit board 422, a first coil 411 and a second coil 412 that are respectively and correspondingly mounted on the first and second flexible circuit boards along a vibration direction, and an electromagnetic damping fin 6 that is fixed on the first coil 411 and the second coil 412, where the electromagnetic damping fin 6 is a copper sheet. The first flexible circuit board 421 includes a first coil mounting portion 4211, a first connection portion 4212 vertically bent from one side edge of the first coil mounting portion 4211, and an external power supply portion 4213 extending from the other side edge of the first coil mounting portion 4211 in parallel and extending from the notch 11 to the housing 1, wherein the first coil mounting portion 4211 is respectively provided with through holes 4214 corresponding to central holes (not labeled) of the annular first coil 411, so that when the flexible circuit board 42 is bonded to the housing 1 and the bracket 2, bonding glue can bond and fix the coil 41, the flexible circuit board 42 and the housing 1 or the bracket 2 together through the through holes 4214, thereby improving the stability of the linear vibration motor structure; a gold finger 4215 electrically connected with the first coil 411 is arranged on the first coil mounting part 4211; the second flexible circuit board 422 includes a second coil mounting portion 4221 and a second connection portion 4222 bent perpendicularly to the second coil mounting portion 4221; the first coil mounting portion 4211 is fixedly bonded to the inner surface of the body of the bracket 2, the external power supply portion 4213 and the first connecting portion 4212 are positioned outside two sides of the shell 1, the second coil mounting portion 4221 is fixedly bonded to the inner surface of the bottom wall of the shell 1, the external power supply portion 4213 is fixedly bonded to the supporting portion 21, and the first connecting portion 4212 and the second connecting portion 4222 penetrate through the notch 11 of the shell 1 to be overlapped and welded and fixed to the outer surface of the side wall of the shell 1. The free end portions of the first connection portion 4212 and the second connection portion 4222 are respectively and correspondingly provided with two anode and cathode power connection pads (not marked) with side walls staggered up and down in the width direction, the staggered anode and cathode power connection pads are beneficial to avoiding a short circuit problem caused by welding dislocation, an insulating film 7 is covered on the outer surface of each power connection pad after welding and fixing to avoid oxidation of a pad copper foil so as to protect a circuit, effective power connection of the power connection pads of the first flexible circuit board 421 and the second flexible circuit board 422 is guaranteed, and power input by the external power supply portion 4213 is stably transmitted to the first coil 411 and the second coil 412. The first coil mounting part 4211 and the second coil mounting part 4221 respectively correspond to the through holes 4214 arranged on the coil 41, so that when the flexible circuit board 42 is bonded on the housing 1 and the bracket 2, the coil 41, the flexible circuit board 42 and the housing 1 or the bracket 2 can be integrally bonded and fixed by bonding glue through the through holes 4214, and the stability of the linear vibration motor structure is improved.

The utility model discloses a first embodiment is shown in fig. 3 and fig. 4, two electromagnetism damping fin 6 are fixed respectively and set up between coil 41 and flexible circuit board 42, golden finger 4215 for avoiding the electricity to be connected between coil 41 and the flexible circuit board 42, electromagnetism damping fin 6 sets up incision 61 in the position that corresponds golden finger 4215 respectively, work as coil 41, electromagnetism damping fin 6 and flexible circuit board 42 three pass through glue fixedly, the integrative bonding of three is realized more easily in the setting of through-hole 4214 and incision 61 is fixed, thereby improve stator module 4's stability, electromagnetism damping fin 6 through setting up receives the temperature influence less, high reliability, can effectively improve linear vibrating motor's vibration performance.

The second embodiment of the present invention is shown in fig. 5, two electromagnetic damping fins 6 are respectively arranged on the coil 41 facing the vibrator assembly 3 at fixed intervals, so that the electromagnetic damping fins 6 are closer to the magnet 32 on the vibrator assembly 3, and thus greater damping is easily generated, and the vibration performance of the linear vibration motor is improved.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "horizontal", "vertical" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a linear vibration motor with electromagnetic damping structure, includes shell, support, stator module, vibrator subassembly and elastic component, the shell forms accommodation space with the support lock, and stator module and vibrator subassembly interval set up in accommodation space, and vibrator subassembly, other end connection shell are connected to the one end of elastic component in the accommodation space and for the reset of vibrator subassembly provides the resilience force, a serial communication port, stator module includes first flexible circuit board, second flexible circuit board and along vibration direction respectively correspond install in on first and the second flexible circuit board and be parallel arrangement's first coil and second coil and fix the electromagnetic damping piece on first coil and second coil respectively, the vibrator subassembly suspend in between first coil and the second coil.

2. A linear vibration motor having an electromagnetic damping structure according to claim 1, wherein said electromagnetic damping sheet is a copper sheet.

3. A linear vibration motor having an electromagnetic damping structure according to claim 1, wherein said electromagnetic damping fins are respectively provided between said vibrator assembly and said first and second coils.

4. A linear vibration motor having an electromagnetic damping structure according to claim 1, wherein said electromagnetic damping fins are provided between said first and second flexible circuit boards and said first and second coils, respectively.

5. The linear vibration motor with an electromagnetic damping structure according to claim 4, wherein the first flexible circuit board includes a first coil mounting portion, a first connecting portion bent perpendicularly from one side edge of the first coil mounting portion, and an external power supply portion extended in parallel from the other side edge of the first coil mounting portion and extending out of the housing; the second flexible circuit board comprises a second coil mounting part and a second connecting part which is vertically bent with the edge of the second coil mounting part; the external power supply part and the first connecting part are positioned on two sides of the shell, and the first connecting part and the second connecting part are overlapped and welded and fixed on the outer surface of the shell.

6. A linear vibration motor having an electromagnetic damping structure according to claim 5, wherein said first and second coils are provided in three numbers, respectively.

7. A linear vibration motor having an electromagnetic damping structure according to claim 6, wherein said first coil mounting portion and said second coil mounting portion are provided with gold fingers corresponding to said first and second coils, respectively.

8. The linear vibration motor with an electromagnetic damping structure according to claim 7, wherein the electromagnetic damping fin is provided with a notch at a position corresponding to the gold finger.

9. A linear vibration motor having an electromagnetic damping structure as set forth in claim 8, wherein said vibrator assembly includes a mass, four magnets embedded in said mass, and a pole piece welded to a bottom surface of said mass for supporting said magnets.