CN110913316B

CN110913316B - Vibration exciter for electronic product and electronic product

Info

Publication number: CN110913316B
Application number: CN201911168364.XA
Authority: CN
Inventors: 毛东升; 史德璋; 高志明; 王永强
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2021-05-18
Anticipated expiration: 2039-11-25
Also published as: CN110913316A

Abstract

The invention discloses a vibration exciter for an electronic product and the electronic product. The vibration exciter comprises a first vibration assembly and a second vibration assembly, and an elastic sheet is positioned between the first vibration assembly and the second vibration assembly and is provided with a central area and two annular cantilevers, the annular cantilevers are connected to the central area, edge connecting areas are formed on the two annular cantilevers respectively, and the two annular cantilevers are distributed in central symmetry relative to the central area; the central region is connected with the first vibrating component, and the edge connecting region is connected with the second vibrating component; alternatively, the central region is connected to the second vibrating member and the edge connecting region is connected to the first vibrating member. According to the invention, the first vibration assembly and the second vibration assembly are connected by the elastic sheet, so that the amplitude of the vibration assembly is controlled, and the vibration stability of the vibration exciter is improved.

Description

Vibration exciter for electronic product and electronic product

Technical Field

The invention belongs to the technical field of electroacoustic conversion, and particularly relates to a vibration exciter for an electronic product and the electronic product.

Background

The sound generating device is an important electroacoustic transducer element in electronic products, and is used for converting current signals into sound signals. Along with the rapid development of electronic products in recent years, sound generating devices applied to the electronic products are also improved correspondingly.

In some electronic products, an actuator is provided on a sound emitting part. The vibration of the exciter drives the sound production part to vibrate and produce sound, but the elastic sheet of the existing exciter is connected insecure, so that the vibration effect of the exciter is influenced, and when the exciter is applied to an electronic product, the sound production performance of the electronic product is influenced.

Therefore, in order to solve any one of the above technical problems, the present invention provides a novel vibration exciter for an electronic product and an electronic product.

Disclosure of Invention

An object of the present invention is to provide a vibration exciter for an electronic product and an electronic product.

According to a first aspect of the present invention, there is provided a vibration exciter for an electronic product. The vibration exciter includes:

a first vibration assembly including a first housing and a magnet disposed in the first housing;

a second vibrating assembly including a second housing and a coil disposed in the second housing, an axis of the coil extending toward the first vibrating assembly, the coil configured to be energized with a vibration signal to generate an electromagnetic force with the first vibrating assembly;

the elastic sheet is positioned between the first vibration assembly and the second vibration assembly, the elastic sheet is provided with a central area and two annular cantilevers, the annular cantilevers are connected to the central area, edge connecting areas are formed on the two annular cantilevers respectively, and the two annular cantilevers are distributed in central symmetry relative to the central area;

the central region is connected with the first vibrating component, and the edge connecting region is connected with the second vibrating component; alternatively, the central region is connected to the second vibrating member and the edge connecting region is connected to the first vibrating member.

Optionally, the width of the edge connection region is greater than the width of the annular cantilever itself.

Optionally, the annular cantilever is in a rectangular-like ring structure.

Optionally, the central region comprises a connecting section to which the annular cantilever is connected and a central connecting region to which the central connecting region is connected.

Optionally, the central region comprises two of the central connecting regions, and the two central connecting regions are distributed in a central symmetry manner relative to the connecting segments.

Optionally, the central connection region extends from the connection section into an area surrounded by the annular cantilever.

Optionally, the central connection region is rectangular in shape.

Optionally, the magnet is a halbach magnet assembly, the halbach magnet assembly includes a central magnet and at least two side magnets, the side magnets are disposed around the central magnet, a magnetizing direction of the central magnet is parallel to an axial direction of the coil, a magnetizing direction of the side magnets is perpendicular to the magnetizing direction of the central magnet, and magnetic poles of the side magnets close to the central magnet are the same.

Optionally, the second vibration component includes a balance magnet located in an area surrounded by the coil, and a magnetizing direction of the balance magnet is parallel to an axial direction of the coil.

According to another aspect of the present invention, an electronic product is provided. The electronic product includes:

the electronic product comprises an electronic product main body and a sound production component, wherein the sound production component is connected to the electronic product main body in a vibratile mode;

in the vibration exciter, the first vibration component is arranged on the electronic product main body, and the second vibration component is arranged on the sound production component; or, the first vibration component is arranged on the sound production component, and the second vibration component is arranged on the electronic product main body;

the vibration exciter is configured to drive the sound production component to vibrate and produce sound relative to the electronic product main body.

One technical effect of the invention is that: the elastic sheet is connected with the first vibration assembly and the second vibration assembly, so that the vibration stability of the exciter is improved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic view showing the structure of the vibration exciter of the present invention.

Fig. 2 shows an exploded view of the vibration exciter according to the invention.

Fig. 3 is a schematic structural diagram of the elastic sheet in the vibration exciter according to the present invention.

Fig. 4 is a schematic structural view of a magnet in another embodiment of the vibration exciter of the present invention.

Fig. 5 is a sectional view of the first vibration member and the second vibration member according to the present invention.

Fig. 6 is a schematic view showing the magnetizing direction of the magnet in the vibration exciter according to the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to an embodiment of the present invention, there is provided a vibration exciter for an electronic product. The vibration exciter according to fig. 1 to 3 includes:

a first vibration assembly 101 including a first housing 201 and a magnet disposed in the first housing 201; for example, the magnet is embedded in the first housing 201, and the first housing 201 functions to protect the magnet on the one hand, and the first housing 201 can function to gather magnetic flux and prevent magnetic leakage on the other hand.

A second vibration assembly 102, the second vibration assembly 102 comprising a second housing 207 and a coil 206, the coil 206 being disposed in the second housing 207, an axis of the coil 206 extending towards the first vibration assembly 101, the coil 206 being configured to be energized with a vibration signal to generate an electromagnetic force with the first vibration assembly 101; for example, the coil 206 is embedded in the second housing 207, the coil 206 has a racetrack structure or a rectangular structure, and the long side of the coil 206 is parallel to the long side of the second housing 207. The coil 206 itself has an axis, and the axis of the coil 206 extends toward the first vibratory assembly 101, so that the magnetic induction lines formed by the magnets can penetrate more through the coil 206, and the vibration driving force between the first vibratory assembly and the second vibratory assembly is improved.

The spring plate 103 is located between the first vibration component 101 and the second vibration component 102, the spring plate 103 has a central area 1032 and two annular cantilevers 1031, the annular cantilevers 1031 are connected to the central area 1032, edge connecting areas 1031a are respectively formed on the two annular cantilevers 1031, and the two annular cantilevers 1031 are distributed in a central symmetry manner relative to the central area 1032;

The elastic sheet 103 is disposed between the first vibration assembly 101 and the second vibration assembly 102 in this example, and is used for connecting the first vibration assembly and the second vibration assembly. On one hand, the elastic sheet can control the amplitude of the vibration exciter, improve the vibration stability of the vibration exciter, and can effectively improve the acoustic performance of the electronic product when being applied to the electronic product; on the other hand, the elastic sheet of the embodiment is of a symmetrical structure, and the central area and the edge connecting area are respectively connected with the first vibration assembly and the second vibration assembly, so that the first vibration assembly and the second vibration assembly are more accurately positioned, and the mounting difficulty of the vibration exciter is reduced.

Optionally, the width of the edge connection region is greater than the width of the annular cantilever itself. As shown in fig. 3, the width of the edge connecting region 1031a of the resilient piece 103 is greater than the width of the annular cantilever 1031 itself, so that the connecting area of the edge connecting region 1031a with the first or second vibration component is increased. For example, the edge connecting region 1031a is connected to the first housing 201 or the magnet by welding or bonding; or the edge connecting region 1031a is connected to the second vibration member by welding or bonding, so that the connection between the elastic sheet and the first vibration member or the second vibration member is more secure.

Optionally, the annular cantilever 1031 is in a rectangular-like ring structure. For example, the edge connecting region 1031a is connected to the first vibration component, the central region 1032 is connected to the second vibration component, and the annular cantilever 1031 is in a similar rectangular ring structure, so that on one hand, the stress on the first vibration component 101 and the second vibration component 102 is more balanced, and the vibration frequency and the vibration stability of the vibration exciter are effectively balanced; on the other hand, the annular cantilever 1031 can play a role in bearing a vibration component, so that the vibration exciter can be conveniently mounted.

Optionally, the central region 1032 includes a connecting segment 1032a and a central connecting region 1032b, the annular cantilever 1031 is connected to the connecting segment 1032a, and the central connecting region 1032b is connected to the connecting segment 1032 a. For example, as shown in fig. 3, the spring plate 103 of this example may be integrally formed by injection molding, wherein the spring plate 103 is in a central symmetric structure with respect to the connecting section 1032a, and the connecting section 1032a is in a sheet structure, which improves the connection strength of the two annular cantilevers 1031 on one hand, and on the other hand, the special structure of the spring plate of this example makes the stress of the spring plate itself small, thereby improving the service life of the spring plate 103 and the connection strength of the spring plate.

For example, the annular cantilever 1031 of the present example has a hollow structure, and reduces the weight of the spring plate 103 itself and thus the vibration actuator itself, without affecting the connection strength of the edge connection region 1031 a. When applied to electronic products, the electronic products tend to be light and small.

Optionally, the central region 1032 includes two of the central connection regions 1032b, and the two of the central connection regions 1032b are distributed in a central symmetry with respect to the connection segments 1032 a. For example, when the central connection region 1032b is connected to the first vibration element 101 or the second vibration element 102 by welding or bonding, the symmetric central connection regions 1032b can balance the stress between the vibration elements, and improve the vibration stability of the vibration exciter.

Optionally, the central connection region extends from the connection section into an area surrounded by the annular cantilever. As shown in fig. 3, the center connection region 1032b has a sheet-like structure, so that the connection area of the center connection region 1032b to the first vibration member or the second vibration member is increased, enhancing the connection strength.

Optionally, the central connection region is rectangular in shape. As shown in fig. 3, when the central connection region 1032b is connected to the first vibration component or the second vibration component, on the one hand, the forces applied to the first vibration component 101 and the second vibration component 102 are more balanced, and the vibration frequency and the vibration stability of the vibration exciter are effectively balanced; on the other hand, the central connection region 1032b and the connection section 1032a can function as a carrier for the vibration components, facilitating the installation of the vibration exciter.

Optionally, the magnet is a halbach magnet assembly, as shown in fig. 2, 5 and 6, the halbach magnet assembly includes a central magnet 202b and at least two

side magnets

202a and 202c, the

side magnets

202a and 202c are disposed around the central magnet 202b, a magnetizing direction of the central magnet 202b is parallel to an axial direction of the coil, magnetizing directions of the

side magnets

202a and 202c are perpendicular to the magnetizing direction of the central magnet 202b, and magnetic poles of the side magnets close to the central magnet are the same. This example uses the generation of an ampere force between the coil and the halbach magnet assembly. When the halbach magnet assembly as shown in fig. 1 is formed by the magnets in an array manner, the magnetic utilization rate of the vibration exciter can be improved, and the driving force between the first vibration assembly and the second vibration assembly can be improved.

Optionally, as shown in fig. 2, 5 and 6, the second vibration component includes a balance magnet 204, the balance magnet 204 is located in an area surrounded by the coil 206, and a magnetizing direction of the balance magnet 204 is parallel to an axial direction of the coil. For example, the coil 206 has a racetrack or rectangular configuration, wherein the coil 206 forms an annular hollow structure, the balance magnet 204 is disposed within the annular hollow structure of the coil 206, and the balance magnet 204 repels the center magnet 202b of the halbach magnet assembly. The balance magnet 204 forms a repulsive force with the halbach magnet assembly that can balance the static magnetic force. The balance magnet 204 on the other hand prevents vibration excursions of the halbach magnet assembly. The stability of the vibration exciter is improved.

Alternatively, as shown in fig. 4, the halbach magnet assembly may further include a center magnet 202b, an edge magnet 202a, an edge magnet 202c, and an edge magnet 202d and an edge magnet 202e respectively disposed at both ends of the center magnet 202b to improve the magnetic utilization efficiency of the vibration exciter.

Optionally, a first washer 203 and a second washer 205 are further disposed in the first vibration assembly and the second vibration assembly, respectively. The first washer 203 and the second washer 205 are made of magnetic conductive materials, such as low-carbon steel, SPCC and the like. The first washer 203 and the second washer 205 can gather magnetic induction lines, and magnetic leakage is reduced.

For example, the sound generating component may be a screen, the first vibration component may be fixedly arranged on the screen, and the second vibration component may be fixedly arranged on the electronic product main body. The screen can be driven to vibrate and sound through the ampere force generated in the vibration exciter. The electronic product provided by the invention adopts the vibration exciter provided by the invention, so that the electronic product can be designed to be thinner, and the design requirement of lightening and thinning of the electronic product can be met.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A vibration exciter for an electronic product, comprising:

the elastic sheet is positioned between the first vibration assembly and the second vibration assembly, and is provided with a central area and two annular cantilevers, the central area comprises a connecting section and a central connecting area, the annular cantilevers are connected to the connecting section, and the central connecting area is connected to the connecting section; edge connecting areas are formed on the two annular cantilevers respectively, and the two annular cantilevers are distributed in a central symmetry mode relative to the central area;

2. A vibration exciter according to claim 1, wherein the width of the edge connection region is greater than the width of the annular cantilever itself.

3. A vibration exciter according to claim 1, wherein the annular cantilever is of a rectangular-like annular configuration.

4. A vibration exciter according to claim 1, wherein the central region comprises two of the central connecting regions, the two central connecting regions being arranged centrally symmetrically with respect to the connecting section.

5. A vibration exciter according to claim 1, wherein the central connection region extends from the connection section into the region surrounded by the annular cantilever.

6. A vibration exciter according to claim 1, wherein the central connecting region is rectangular in shape.

7. A vibration exciter according to claim 1, wherein the magnet is a halbach magnet assembly comprising a central magnet and at least two side magnets, the side magnets being disposed around the central magnet, the central magnet having a direction of magnetization parallel to the axial direction of the coil, the side magnets having a direction of magnetization perpendicular to the direction of magnetization of the central magnet, the poles of each of the side magnets adjacent to the central magnet being the same.

8. A vibration exciter according to claim 1, wherein the second vibration assembly comprises a balance magnet located in an area surrounded by the coil, and a magnetizing direction of the balance magnet is parallel to an axial direction of the coil.

9. An electronic product, comprising:

a vibration actuator as claimed in any one of claims 1 to 8, wherein said first vibration element is provided on said electronic product main body, and said second vibration element is provided on said sound emitting part; or, the first vibration component is arranged on the sound production component, and the second vibration component is arranged on the electronic product main body;