WO2021128081A1

WO2021128081A1 - Vibration motor

Info

Publication number: WO2021128081A1
Application number: PCT/CN2019/128394
Authority: WO
Inventors: 凌芳华; 浦晓峰; 邵焱; 周晓荣
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-07-01

Abstract

A vibration motor (1), comprising a housing (10) provided with an opening (101), a vibrator component (20) accommodated within the housing (10) and separated from a top plate (102) of the housing (10), elastic pieces (30) connecting the vibrator component (20) and the housing (10), a base plate (40) covering the opening (101), and a drive component (50) arranged at the side of the base plate (40) close to the vibrator component (20) and separated from the vibrator component (20); the drive component (50) comprises a drive coil (501); the vibration motor (1) is also provided with limiting components (60), the limiting components (60) being arranged at two opposite sides of the drive coil (501) in a first direction, being separated from the vibrator component (20) and being fixedly connected to the base plate (40); the first direction is the direction perpendicular to the vibration direction of the vibration component (20).

Description

Vibration motor

Technical field

The utility model relates to the technical field of electronic equipment, in particular to a vibration motor.

Background technique

With the development of electronic technology, portable consumer electronic products are becoming more and more sought after by people, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment equipment, etc., generally use vibration motors for system feedback, such as mobile phones. Incoming call reminder, information reminder, navigation reminder, vibration feedback of game console, etc. Such a wide range of applications requires high performance and long service life of the vibration motor.

A vibration motor usually includes a housing with a housing space and a vibrator assembly housed in the housing space, an elastic member respectively connecting the housing and the vibrator assembly, and a drive coil for driving the vibrator assembly. When the driving coil is used to provide driving force, the vibrator assembly is driven by the driving coil to reciprocate elastically in the housing to generate vibration.

In the actual application process, it is hoped that the vibrator assembly can generate enough vibration. Therefore, for example, increasing the driving force of the vibration motor, thereby improving the vibration performance of the vibration motor, is a hot topic being studied by those skilled in the art.

Summary of the invention

technical problem

The purpose of the utility model is to disclose a vibration motor.

The solution to the problem

Technical solutions

The purpose of the present invention is achieved by adopting the following technical solutions to provide a vibration motor, the vibration motor includes: the vibration motor includes a shell with an opening, is accommodated in the shell and is spaced apart from the top plate of the shell A vibrator assembly, an elastic member connecting the vibrator assembly and the housing, a substrate covering the opening, and a drive assembly disposed on the side of the substrate close to the vibrator assembly and spaced apart from the vibrator assembly, The driving component includes a driving coil; the vibration motor is also provided with a limiting component, and the limiting component is arranged on opposite sides of the driving coil in the first direction, and is spaced apart from the vibrator component and connected to the substrate The fixed connection, wherein the first direction is a direction perpendicular to the vibration direction of the vibration component.

Preferably, the limiting component includes a first limiting member and a second limiting member that are arranged at intervals on opposite sides of the driving coil in the first direction, wherein the first limiting member is provided with a first arc shape The limiting portion, the second limiting member is provided with a second arc limiting portion, and the driving coil is arranged between the first arc limiting portion and the second arc limiting portion.

Preferably, the vibrator assembly includes a weight member and a magnetic member, wherein the weight member is provided with a through hole, and the magnetic member is accommodated in the through hole.

Preferably, the vibrator assembly further includes a magnetic conductive plate, a groove communicating with the through hole is opened on a side of the counterweight away from the driving coil, and the magnetic conductive plate is accommodated in the groove.

Preferably, there are two elastic members, which are centrally symmetrically arranged on opposite sides of the vibrating direction of the vibrator assembly, and are connected to the vibrator assembly and the housing.

Preferably, the elastic member includes a first fixing part, a second fixing part, and an elastic deformation part connecting the first fixing part and the second fixing part, wherein the first fixing part and the housing Connected, the second fixing part is connected with the vibrator assembly.

Preferably, the elastic deformation portion includes at least two elastic arms and a bent portion connecting two adjacent elastic arms.

Preferably, a buffer member is provided between the first fixing portion and the second fixing portion.

Preferably, the drive assembly further includes a drive cable, the drive cable is arranged on a side of the substrate close to the drive coil and is electrically connected to the drive coil.

The beneficial effects of the invention

Beneficial effect

Compared with the prior art, the vibration motor provided by the present utility model is provided with limit components on both sides of the driving coil in the direction perpendicular to the vibration direction of the vibrating component, thereby effectively protecting the driving coil and making the driving coil possible. The dimension in the direction perpendicular to the vibration direction of the vibration component can be made as large as possible to increase the driving force.

Brief description of the drawings

Description of the drawings

Figure 1 is a schematic diagram of the three-dimensional structure of the vibration motor provided by the utility model;

Figure 2 is a schematic diagram of the explosive structure of the vibration motor provided by the utility model;

Figure 3 is a schematic top view of the structure of the vibration motor provided by the utility model;

Fig. 4 is a schematic cross-sectional structure view of Fig. 3 along the A-A direction;

Figure 5 is a schematic diagram of the enlarged structure of Figure 4 at A;

Fig. 6 is a structural schematic diagram of the cooperation of the base plate of the vibrating motor with the driving component and the limit component;

Fig. 7 is a schematic diagram of the exploded structure of the vibrator assembly of the vibrating motor;

FIG. 8 is a schematic diagram of a three-dimensional structure of an elastic member of a vibration motor;

Fig. 9 is a structural schematic diagram of the cooperation of the vibrator assembly, the elastic member and the shell of the vibration motor.

Invention embodiment

Detailed ways

The present utility model will be further explained below in conjunction with the drawings and embodiments.

It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain in a specific posture (as shown in the attached drawing) If the relative positional relationship and movement of the components change, the directional indication will change accordingly.

It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a centering element at the same time. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time.

In addition, the descriptions related to "first", "second", etc. in the present utility model are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the scope of protection required by the utility model.

1-9, a vibration motor 1 includes a housing 10 with an opening 101, a vibrator assembly 20 received in the housing 10 and spaced apart from the top plate 102 of the housing 10 to form a first gap 104, The elastic member 30 connecting the vibrator assembly 20 and the housing 10, the substrate 40 covering the opening 101, and the driving assembly 50 arranged on the side of the substrate 40 close to the vibrator assembly 20 and spaced apart from the vibrator assembly 20 to form a second gap 105. The driving assembly 50 includes a driving coil 501. The vibration motor 1 is also provided with a limit component 60. The limit components 60 are arranged on opposite sides of the driving coil 501 in the first direction, and are spaced apart from the vibrator component 20 and fixedly connected to the substrate 40. Wherein, the first direction is a direction perpendicular to the vibration direction of the vibration component 20. As shown in FIG. 6, the vibration direction of the vibration component 20 is the X-axis direction, and the limit component 60 is disposed opposite to the driving coil 501 in the Y-axis direction. On both sides.

By setting the limit component 60 in the direction perpendicular to the vibration direction of the vibrating assembly 20 of the driving coil 501, the driving coil 501 can be effectively protected, and the size of the driving coil 501 can be corresponding to the direction perpendicular to the vibration direction of the vibrating assembly 20. Can be as large as possible to enhance the driving force.

In some embodiments, the limiting component 60 includes a first limiting member 601 and a second limiting member 602 spaced apart on opposite sides of the driving coil 501 in the first direction, wherein the first limiting member 601 is provided with a first limiting member 601 The arc-shaped limiting portion 6011, the second limiting member 602 is provided with a second arc-shaped limiting portion 6021, and the driving coil 501 is disposed between the first arc-shaped limiting portion 6011 and the second arc-shaped limiting portion 6021, so that The size of the driving coil 501 in the Y direction can be as large as possible, as shown in FIG. 6.

Preferably, the thicknesses of the first limiting portion 601 and the second limiting portion 602 are both greater than the thickness of the driving coil 501.

In some embodiments, the vibrator assembly 20 includes a counterweight 201 and a magnetic component 202, wherein the counterweight 201 is provided with a through hole 2011, and the magnetic component 202 is received in the through hole 2011, as shown in FIG. 7.

Preferably, the magnetic member 202 is a permanent magnet, and there are two through holes 2011, and there are also two magnetic members 202 corresponding to the through holes 2011.

In some embodiments, the vibrator assembly 20 further includes a magnetic conductive plate 203, a groove 2012 communicating with the through hole 2011 is opened on the side of the counterweight 201 away from the driving coil 501, and the magnetic conductive plate 203 is received in the groove 2012.

In some embodiments, there are two elastic members 30, which are centrally symmetrically arranged on opposite sides of the vibrating direction of the vibrator assembly 20 and connect the vibrator assembly 20 and the housing 10.

Wherein, each elastic member 30 includes a first fixing portion 301, a second fixing portion 302, and an elastic deformation portion 303 connecting the first fixing portion 301 and the second fixing portion 302, wherein the first fixing portion 301 is connected to the housing 10 , The second fixing portion 302 is connected to the vibrator assembly 20, wherein the elastic deformation portion 303 is a V-shaped spring, as shown in FIG. 8.

Driven by an external force, the second fixing portion 302 is displaced with the vibration of the vibrator assembly 20, so that the elastic deformation portion 303 is elastically deformed to provide restoring force, and the vibrator reciprocates along the vibration direction.

Specifically, the elastic deformation portion 303 includes at least two elastic arms 3031 and a bending portion 3032 connecting two adjacent elastic arms 3031. The bending portion 3032 is a semicircular arc transition structure.

It can be understood that the first fixing portion 301 can be connected to the housing 10 in a manner that the first fixing portion 301 is connected to the side wall 103 of the housing 10. The second fixing portion 302 can be connected to the vibrator assembly 20 in a manner that the second fixing portion 302 is connected to the side wall of the counterweight 201, as shown in FIG. 9.

The connection manner of the first fixing portion 301, the second fixing portion 302, and the elastic deformation portion 303 of the elastic member 30 may be by welding or integrally formed, which is not limited herein.

In some embodiments, a buffer 305 is provided between the first fixing portion 301 and the second fixing portion 302.

In some embodiments, the driving assembly 50 further includes a driving flat wire 502, and the driving flat wire 502 is disposed on the side of the substrate 40 close to the driving coil 501 and is electrically connected to the driving coil 501.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to The scope of protection of the utility model.

Claims

A vibration motor, characterized in that: the vibration motor includes a housing with an opening, a vibrator assembly housed in the housing and spaced apart from the top plate of the housing, and connecting the vibrator assembly and the housing An elastic member of, a substrate covering the opening, and a drive assembly arranged on a side of the substrate close to the vibrator assembly and spaced apart from the vibrator assembly, the drive assembly including a drive coil;

The vibration motor is further provided with a limit component, the limit component is arranged on opposite sides of the drive coil in the first direction, and is spaced from the vibrator component and fixedly connected to the substrate, wherein the first One direction is a direction perpendicular to the vibration direction of the vibration component.
The vibration motor according to claim 1, wherein the limiting component includes a first limiting member and a second limiting member that are arranged at intervals on opposite sides of the driving coil in the first direction, wherein the The first limiting member is provided with a first arc-shaped limiting portion, the second limiting member is provided with a second arc-shaped limiting portion, and the driving coil is provided on the first arc limiting portion and the Between the second arc-shaped limiting parts.
The vibration motor according to claim 1, wherein the vibrator assembly includes a weight member and a magnetic member, wherein the weight member is provided with a through hole, and the magnetic member is received in the through hole.
The vibration motor according to claim 3, wherein the vibrator assembly further comprises a magnetic conductive plate, a groove communicating with the through hole is opened on the side of the counterweight away from the driving coil, and The magnetic conductive plate is accommodated in the groove.
The vibration motor according to claim 1, wherein there are two elastic members, which are centrally symmetrically arranged on opposite sides of the vibrating direction of the vibrator assembly, and are connected to the vibrator assembly and the housing.
The vibration motor according to claim 5, wherein the elastic member comprises a first fixing part, a second fixing part, and an elastic deformation part connecting the first fixing part and the second fixing part, wherein: The first fixing part is connected with the housing, and the second fixing part is connected with the vibrator assembly.
7. The vibration motor according to claim 6, wherein the elastic deformation part comprises at least two elastic arms and a bending part connecting two adjacent elastic arms.
The vibration motor according to claim 6, wherein a buffer member is provided between the first fixing part and the second fixing part.
The vibration motor according to claim 1, wherein the drive assembly further comprises a drive cable, the drive cable is arranged on a side of the substrate close to the drive coil and is electrically connected to the drive coil.