WO2020228344A1

WO2020228344A1 - Exciter and electronic device

Info

Publication number: WO2020228344A1
Application number: PCT/CN2019/129779
Authority: WO
Inventors: 毛东升; 朱跃光; 张新众; 马咪; 高志明
Original assignee: 歌尔股份有限公司
Priority date: 2019-05-14
Filing date: 2019-12-30
Publication date: 2020-11-19
Also published as: CN110234054A; CN110234054B

Abstract

Disclosed are an exciter and an electronic device. The exciter comprises a housing, a stator assembly fixed in the housing, and a vibrator assembly located in the housing and engaged with the stator assembly. The exciter further comprises a buffer component connected to the stator assembly. The buffer component is configured to adjust an elasticity coefficient of the stator assembly so as to improve the frequency response of the exciter in a high-frequency region.

Description

Exciter and electronic equipment

Technical field

The present invention relates to the technical field of electro-acoustic conversion devices, and more specifically, to an exciter and electronic equipment.

Background technique

The sound generating device is an important electroacoustic transducer element in electronic products, which is used to convert current signals into sound. With the rapid development of electronic products in recent years, sound generating devices applied to electronic products have also been improved accordingly.

The traditional sounding device used for mobile phone handsets is the receiver. In today's mobile phone industry, with people’s pursuit of the largest screen-to-body ratio, full-screen displays are gradually becoming the main development direction of mobile phones, and a technical problem comes with it. How to realize the earpiece function under the non-opening design of the screen, and have a better listening experience. Therefore, in order to solve the problem of the receiver opening on the mobile phone screen, the exciter is gradually replacing the receiver as a mobile phone sound component. However, the exciter in the prior art generally has the problem of low frequency response in the effective high-frequency region. Therefore, how to optimize the sound effect of the exciter in the high-frequency region and provide users with a better sound experience has become a technology that has attracted much attention. problem.

In view of this, it is necessary to provide a new technical solution to solve the above-mentioned problems.

Summary of the invention

An object of the present invention is to provide a new technical solution for exciters and electronic equipment.

According to the first aspect of the present invention, there is provided an exciter, including:

A housing, a stator assembly fixed in the housing, and a vibrator assembly located in the housing and mated with the stator assembly; further comprising a cushioning component connected to the stator assembly, the cushioning component being configured to adjust the The elastic coefficient of the stator assembly can improve the frequency response of the exciter in the high frequency region.

Optionally, the buffer component is an elastic element sandwiched between the housing and the stator assembly, and the elastic element is configured to form elasticity between the housing and the stator assembly to adjust the elasticity of the stator assembly. coefficient.

Optionally, the elastic element is a first elastic piece, both ends of the first elastic piece are bent to the same side, both ends of the first elastic piece are fixedly connected to the inner surface of the housing, and the stator assembly is fixedly connected On the first shrapnel.

Optionally, the width of both ends of the first elastic piece is smaller than the width of the middle part.

Optionally, the elastic element is a second elastic piece, both ends of the second elastic piece are bent to the same side, both ends of the second elastic piece are fixedly connected to the inner surface of the housing, and the stator assembly is fixedly connected On the second elastic piece; the ends of the two ends of the second elastic piece are relatively provided with notches.

Optionally, the buffer component is a hollow part opened on the housing, the stator assembly is installed at the position of the hollow part of the housing, and the hollow part is configured to reduce the gap between the housing and the stator assembly. The contact area to adjust the elastic coefficient of the stator assembly.

Optionally, the hollow part is L-shaped.

Optionally, four hollow parts are symmetrically arranged on the shell.

Optionally, the vibrator assembly includes a magnet, a washer and an elastic component; the magnet and the washer are connected in the housing through the elastic component.

According to another aspect of the present invention, there is provided an electronic device including the exciter as described above.

In the exciter of the present invention, a buffer part is arranged between the housing and the stator assembly, and the elastic coefficient of the stator assembly is adjusted by the buffer part, thereby improving the frequency response of the exciter in the high frequency region and optimizing the exciter in the high frequency region. Sound effects provide users with a better sound experience.

Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.

Description of the drawings

The drawings incorporated in the specification and constituting a part of the specification illustrate the embodiments of the present invention, and together with the description thereof are used to explain the principle of the present invention.

Figure 1 is a schematic structural diagram of a first embodiment of an exciter of the present invention;

2 is a schematic diagram of the structure of the first shrapnel in an exciter of the present invention;

3 is a schematic structural diagram of a second embodiment of an exciter of the present invention;

4 is a schematic diagram of the structure of a second elastic piece in an exciter of the present invention;

Fig. 5 is a schematic structural diagram of a third embodiment of an exciter of the present invention.

Detailed ways

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

The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.

The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the specification.

In all the examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

It is found through experiments that in the high frequency range, the vibration displacement of the exciter is small, so the vibration of the stator assembly cannot be ignored. In view of this, as shown in Figure 1, Figure 3, and Figure 5, an embodiment of the present invention provides an exciter, which includes a housing and a stator assembly fixed in the housing. Specifically, the housing may include The first housing 1 and the second housing 2 are connected together, and a space for accommodating the vibrator assembly and the stator assembly is formed between the first housing 1 and the second housing 2. The exciter also includes a vibrator assembly located in the housing and matched with the stator assembly. The vibrator assembly is used as a vibration source to vibrate, and when it vibrates, it drives the screen or housing of the electronic device to vibrate and produce sound. The exciter also includes a buffer component connected to the stator assembly. In one embodiment, the stator component may be a coil 3, and the buffer component is configured to adjust the elastic coefficient of the stator assembly to improve The frequency response of the exciter in the high-frequency region can optimize the sound effect of the exciter in the high-frequency region by improving the frequency response of the exciter in the high-frequency region, and provide users with a better sound experience.

In one embodiment, the buffer component is an elastic element sandwiched between the second housing 2 and the coil 3. In the prior art, the second housing 2 and the coil 3 are directly stacked together, so that the stator assembly The elastic coefficient of the second housing 2 and the coil 3 is sandwiched between the second housing 2 and the coil 3 to form an elastic isolation, that is, the elastic element can not only The housing 2 and the coil 3 are isolated. More importantly, it can make the second housing 2 and the coil 3 have elasticity, so that the elastic coefficient of the stator assembly can be adjusted and the exciter can be improved. Frequency response of the frequency zone.

As shown in Figure 2, in one embodiment, the elastic element is a first elastic piece 4, and both ends of the first elastic piece 4 are bent to the same side. In this embodiment, the two ends of the first elastic piece 4 are facing the same Side symmetrical bending, the bent ends of the first elastic piece 4 are fixedly connected (for example, welded) at the inner surface of the second housing 2, and the coil 3 is fixedly connected (for example, glued) on the first elastic piece 4 away from The surface of the second shell 2; the width of the two ends of the first elastic piece 4 is smaller than the width of the middle part, and the thickness of the two ends of the first elastic piece 4 can also be thinned to form a stepped structure at both ends, In addition, through holes can be opened at both ends of the first elastic piece 4 to reduce the overall mass of the first elastic piece 4 and make it more compact and lighter.

As shown in Figure 4, in one embodiment, the elastic element is a second elastic piece 5, and both ends of the second elastic piece 5 are bent to the same side. In this embodiment, the two ends of the second elastic piece 5 are facing the same Side symmetrical bending, both ends of the second elastic piece 5 are fixedly connected (for example, welded) at the inner surface of the second housing 2, and the coil 3 is fixedly connected (for example, glued) on the second elastic piece 5 away from the The surface of the second shell 2; the ends of the two ends of the second elastic piece 5 are provided with gaps opposite to each other, forming a fork-like structure, so that the two ends of the second elastic piece 5 and the inner surface of the second shell 2 There are a total of four connections, and this structure can reduce the quality of the second elastic piece 5 while ensuring the tightness of the connection between the second elastic piece 5 and the second housing 2.

As shown in FIG. 5, in one embodiment, the buffer member is a hollow part 6 opened on the second housing 2, and the stator assembly (for example, the coil 3) is installed in the hollow part of the second housing 2. At position 6, the hollow portion 6 is configured to reduce the contact area between the second housing 2 and the coil 3 to adjust the elastic coefficient of the stator assembly. In this embodiment, by opening the hollow portion 6 on the second housing 2, the part of the coil 3 fixedly connected to the second housing 2 can be reduced, so the fixed part of the coil 3 on the second housing 2 can be adjusted. Stiffness, thereby adjusting the elastic coefficient of the stator assembly, shifts the resonant frequency f0 of the stator assembly, and improves the frequency response of the exciter in the effective high frequency region.

In one embodiment, the hollow part 6 is designed to be L-shaped and four L-shaped hollow parts 6 are symmetrically arranged on the second housing 2. In other embodiments, the hollow portion 6 may also have other shapes, such as a circle, and the number of hollow portions 6 is not limited to four, and can be flexibly set according to actual needs, as long as it is on the second housing 2. The hollow part 6 provided can reduce the area of the fixed connection between the coil 3 and the second housing 2.

Referring to Figures 1, 3, and 5, in one embodiment, the vibrator assembly includes a magnet 7, a washer 8 and an elastic component. The magnet 7 and the washer 8 are connected in the housing through the elastic component, so The elastic component is a spring 9 or a third elastic piece; the coil 3 is wound by a wire in one direction to form a closed ring structure, the middle of the coil 3 has a through hole, and the circumference of the through hole is the wire of the coil 3 The wiring area refers to the area through which the leads in the coil 3 actually pass, and the entire wiring area is ring-shaped. The magnet 7 cooperates with the coil 3 to form a magnetic field. The washer 8 is arranged on the magnet 7 to increase the magnetic induction intensity of the magnetic field. The spring 9 or the third elastic piece is arranged on the washer 8. The spring 9 or the third elastic piece can be arranged as required More than one.

By adjusting the elastic coefficient k of the stator assembly, the exciter of the present invention can effectively adjust the resonance frequency f0 (f0=√(k/m)/2π) of the stator assembly in the high-frequency region, thereby changing the high-frequency resonance peak of the stator assembly. Position to improve the frequency response of the exciter in the effective high frequency region.

An embodiment of the present invention also provides an electronic device, which includes the exciter as described above. The electronic device may be a mobile phone or a tablet computer, etc., which is not limited in the present invention.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

An exciter, characterized in that it comprises:

The housing and the stator assembly fixed in the housing, and the vibrator assembly located in the housing and mated with the stator assembly, further include a buffer component connected to the stator assembly, and the buffer component is configured to adjust the The elastic coefficient of the stator assembly can improve the frequency response of the exciter in the high frequency region.
The exciter according to claim 1, wherein the buffer member is an elastic element sandwiched between the housing and the stator assembly, and the elastic element is configured to be used between the housing and the stator assembly. The elasticity is formed to adjust the elastic coefficient of the stator assembly.
The exciter according to claim 2, wherein the elastic element is a first elastic piece, both ends of the first elastic piece are bent to the same side, and both ends of the first elastic piece are fixedly connected to the housing At the inner surface, the stator assembly is fixedly connected to the first elastic sheet.
The exciter according to claim 3, wherein the width of the two ends of the first elastic piece is smaller than the width of the middle part.
The exciter according to claim 2, wherein the elastic element is a second elastic piece, both ends of the second elastic piece are bent to the same side, and both ends of the second elastic piece are fixedly connected to the housing On the inner surface, the stator assembly is fixedly connected to the second elastic piece; the ends of the two ends of the second elastic piece are relatively provided with notches.
The exciter according to claim 1, wherein the buffer member is a hollow part opened on the housing, the stator assembly is installed at a position of the hollow part of the housing, and the hollow part is configured to To reduce the contact area between the housing and the stator assembly to adjust the elastic coefficient of the stator assembly.
The exciter according to claim 6, wherein the hollow part is L-shaped.
The exciter according to claim 7, wherein four hollow parts are symmetrically arranged on the housing.
The exciter according to any one of claims 1-8, wherein the vibrator assembly comprises a magnet, a washer and an elastic component; the magnet and the washer are connected in the housing through the elastic component.
An electronic device, characterized in that it comprises the exciter according to any one of claims 1-9.