WO2022000631A1

WO2022000631A1 - Sound producing device and electronic device provided with same

Info

Publication number: WO2022000631A1
Application number: PCT/CN2020/103792
Authority: WO
Inventors: 邱志强
Original assignee: 瑞声声学科技(深圳)有限公司
Priority date: 2020-06-30
Filing date: 2020-07-23
Publication date: 2022-01-06
Also published as: CN111935615A

Abstract

Provided are a sound producing device and an electronic device provided with same. The sound producing device comprises a voice coil and a framework, wherein the framework is arranged on the voice coil; the framework comprises a framework body and an oxide layer; the framework body is made of an alloy; and the oxide layer is at least arranged on the side of the framework body that faces the voice coil. The sound producing device and the electronic device provided with same in the present application can effectively solve the problem in the prior art that short circuiting easily occurs when a framework and a voice coil are glued.

Description

Sound producing device and electronic equipment having the same

technical field

The present application relates to the field of electro-acoustic conversion, and in particular, to a sound-generating device and an electronic device having the same.

Background technique

With the advent of the mobile Internet era, the number of portable smart mobile devices continues to increase. Portable smart mobile devices enable users to obtain a large amount of information anywhere through the interaction of text, images, and sounds, which greatly facilitates users' lives. As the main equipment for transmitting sound information, sound-emitting devices form an important part of portable smart mobile devices.

technical problem

The sound-generating device in the prior art includes a voice coil and a dome, and the voice coil and the dome are connected by a skeleton. In order to ensure the improvement of the acoustic performance of the skeleton, the material of the skeleton is usually a light-weight, high-strength alloy, but the alloy material itself has electrical conductivity. The surface insulation layer, which leads to a short circuit between the skeleton and the voice coil, affects the use of the sound-emitting device. Therefore, it is necessary to provide a sound generating device and an electronic device having the same.

technical solutions

The purpose of the present application is to provide a sound-generating device and an electronic device having the same, which are used to solve the problem of easy short circuit when gluing a skeleton and a voice coil in the prior art.

The technical solution of the present application is as follows: in order to achieve the above purpose, the sound-emitting device of the present application includes a voice coil and a skeleton, the skeleton is arranged on the voice coil, the skeleton includes a skeleton body and an oxide layer, and the skeleton body is an alloy The oxide layer is arranged at least on the side of the skeleton body facing the voice coil.

Further, the oxide layer is arranged on the outer side of the skeleton body in the circumferential direction.

Further, the skeleton is in a frame structure, the voice coil is in a frame structure, and the skeleton is arranged on the end face of the voice coil.

Further, the sound-generating device further includes a dome, and the skeleton is arranged between the dome and the voice coil.

Further, the oxide layer is also arranged on the side of the skeleton body facing the dome.

Further, the skeleton and the dome are glued and fixed.

Further, the skeleton and the voice coil are glued and fixed.

Further, the sounding device further includes a magnetic steel assembly, the magnetic steel assembly includes a main magnetic steel and a secondary magnetic steel, the secondary magnetic steel and the main magnetic steel are arranged at intervals to form a magnetic gap, and the voice coil is arranged in the magnetic gap.

Further, the sound-emitting device also includes a pole core assembly, the pole core assembly includes a main pole core and a secondary pole core, the main pole core is arranged on the main magnetic steel, the auxiliary pole core is arranged on the auxiliary magnetic steel, and the voice coil is arranged on the main pole core. and the gap formed between the secondary pole core.

On the other hand, the present application also provides an electronic device, including a sound-generating device, and the sound-generating device is a sound-generating device including all or part of the above technical structures.

beneficial effect

The beneficial effect of the present application is that: an oxide layer is arranged between the skeleton body and the voice coil to form an insulating structure, so that even if burrs are generated during laser cutting of the alloy skeleton body and the insulating structure on the surface of the voice coil is destroyed, the gap between the skeleton body and the voice coil is still intact. The insulating oxide layer prevents short circuits between the bobbin body and the voice coil, reducing the risk of short circuits.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a partial cross-sectional structural schematic diagram of Embodiment 1 of the sound-emitting device of the application;

FIG. 2 is a schematic view of a partially enlarged structure at the position A of the sound-emitting device of FIG. 1; and

FIG. 3 is a schematic diagram of a partially enlarged structure of the second embodiment of the sound-emitting device of the present application.

The above figures contain the following reference numbers:

10, voice coil; 20, skeleton; 21, skeleton body; 22, oxide layer; 30, dome; 40, magnet steel assembly; 41, main magnet steel; 42, auxiliary magnet steel; 50, pole core assembly; 51, main pole core; 52, secondary pole core.

Embodiments of the present invention

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the accompanying drawings. However, the application may be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure of this application is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are for the purpose of describing specific embodiments only, and are not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

As shown in FIG. 1 , the sound-generating device of the first embodiment includes a voice coil 10 , a skeleton 20 , a dome 30 , a magnetic steel assembly 40 and a pole core assembly 50 . The magnetic steel assembly 40 includes a main magnetic steel 41 and a secondary magnetic steel 42 , there are two secondary magnetic steels 42 , and the two secondary magnetic steels 42 are respectively arranged on both sides of the main magnetic steel 41 and are symmetrically arranged. The secondary magnetic steel 42 is spaced apart from the main magnetic steel 41 to form a magnetic gap, and the voice coil 10 is arranged in the magnetic gap. The pole core assembly 50 includes a main pole core 51 and a secondary pole core 52, the main pole core 51 is arranged on the main magnetic steel 41, the auxiliary pole core 52 is arranged on the auxiliary magnetic steel 42, and the voice coil 10 is arranged on the main pole core 51 and the auxiliary pole core 51. in the gap formed between the pole cores 52 . The skeleton 20 and the voice coil 10 are both frame structures. The skeleton 20 is arranged between the voice coil 10 and the dome 30 and is attached to the end face of the voice coil 10. The skeleton 20 and the dome 30 are glued and fixed, and the skeleton 20 and the voice coil 10 are glued and fixed.

Specifically, as shown in FIG. 2 , the skeleton 20 of this embodiment includes a skeleton body 21 and an oxide layer 22 . The skeleton body 21 is made of an alloy material, and the oxide layer 22 is disposed on the side of the skeleton body 21 facing the voice coil 10 .

Applying the technical solution of this embodiment, an oxide layer 22 is arranged between the skeleton body 21 and the voice coil 10 to form an insulating structure, so that even if burrs are generated when the alloy skeleton body 21 is laser cut and the insulating structure on the surface of the voice coil 10 is destroyed, the skeleton There is still an insulating oxide layer 22 between the body 21 and the voice coil 10 to prevent a short circuit between the skeleton body 21 and the voice coil 10 and reduce the risk of short circuit.

Specifically, the oxide layer 22 can form an oxide thin layer structure on the surface of the skeleton body 21 by oxidizing the surface of the alloy, so that the skeleton 20 has good insulation performance and reduces the friction when the skeleton 20 and the voice coil 10 are glued. Risk of short circuit.

In other embodiments not shown in the figures, the skeleton body may also be provided with an oxide layer on the side facing the dome.

Embodiment 2

The sound-emitting device of the second embodiment improves the skeleton structure on the basis of the first embodiment. Specifically, as shown in FIG. 3 , in this embodiment, the oxide layer 22 is disposed on the outer side of the skeleton body 21 in the circumferential direction, so that the oxide layer 22 covers the entire surface of the skeleton body 21 . This not only ensures the advantages of light weight and high strength of the skeleton 20, but also avoids the risk of short circuit that may be caused by its electrical conductivity from all directions.

The present application also provides an electronic device. The electronic device (not shown in the figure) according to this embodiment includes a sound-generating device. Specifically, the sound-generating device is a sound-generating device including all or part of the above technical structures. The electronic device of this embodiment has the advantages that a short circuit between the skeleton and the voice coil is less likely to occur, and the service life is long.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

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

Claims

A sound-emitting device is characterized in that it includes a voice coil and a skeleton, the skeleton is arranged on the voice coil, the skeleton includes a skeleton body and an oxide layer, the skeleton body is made of an alloy material, and the oxide layer is provided with at least on the side of the skeleton body facing the voice coil.
The sound-emitting device according to claim 1, wherein the oxide layer is disposed on the outer side of the skeleton body in the circumferential direction.
The sound-generating device according to claim 1, wherein the skeleton is in a frame structure, the voice coil is in a frame structure, and the skeleton is arranged on an end face of the voice coil.
The sound-generating device according to claim 1, characterized in that, the sound-generating device further comprises a dome, and the skeleton is arranged between the dome and the voice coil.
The sound-emitting device according to claim 4, wherein the oxide layer is further disposed on the side of the skeleton body facing the dome.
The sound-emitting device according to claim 4, wherein the frame and the dome are glued and fixed.
The sound-generating device according to claim 1, wherein the skeleton and the voice coil are fixed by gluing.
The sounding device according to claim 1, wherein the sounding device further comprises a magnetic steel assembly, the magnetic steel assembly includes a main magnetic steel and a secondary magnetic steel, and the secondary magnetic steel is spaced from the main magnetic steel The arrangement forms a magnetic gap in which the voice coil is arranged.
The sounding device according to claim 8, wherein the sounding device further comprises a pole core assembly, the pole core assembly includes a main pole core and a secondary pole core, the main pole core is arranged on the main magnetic steel The secondary pole core is arranged on the secondary magnetic steel, and the voice coil is arranged in the gap formed between the main pole core and the secondary pole core.
An electronic device, comprising a sound-emitting device, characterized in that, the sound-emitting device is the sound-emitting device according to any one of claims 1 to 9.