WO2021114277A1

WO2021114277A1 - Sound production device

Info

Publication number: WO2021114277A1
Application number: PCT/CN2019/125352
Authority: WO
Inventors: 宋威; 邵涛
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: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-06-17

Abstract

The present invention provides a sound production device, comprising a basket, a vibration system, and a magnetic circuit system driving the vibration system to vibrate to produce sound, wherein the vibration system and the magnetic circuit system are separately fixed to the basket. The vibration system comprises a diaphragm fixed to the basket and a voice coil assembly driving the diaphragm to vibrate to produce sound; the diaphragm comprises a surround and a dome attached and fixed to the surround; the surround comprises a vibration part, a surround part extending in a bent manner from the periphery of the vibration part, and a fixed part extending in a bent manner from the surround part toward the basket; the vibration part defines a through hole; the fixed part is fixed to the basket; the dome is attached and fixed to the vibration part and completely covers the through hole; the dome comprises a cover top part, and a connection part that extends in a bent manner from the periphery of the cover top part and is attached and fixed to the vibration part; the connection part obliquely extends from the vibration part in a direction close to or distant from the magnetic circuit system; the cover top part obliquely extends from the side of the connection part distant from the vibration part toward a direction distant from or close to the magnetic circuit system. Compared with the related art, the sound production device in the present invention has excellent acoustic performance.

Description

Sound device

Technical field

The invention relates to the field of electro-acoustic conversion, in particular to a sound-producing device used in portable electronic products.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and most portable mobile terminal devices. Sound-producing devices used to play sounds are widely used in current smart mobile devices such as mobile phones.

The related art sound device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound. The vibration system includes a diaphragm fixed to the basin frame and a vibrating membrane fixed to the frame. The dome of the diaphragm, the diaphragm includes a vibrating part and a through hole penetrating the vibrating part, the dome is fixed to the vibrating part and completely covers the through hole, wherein the dome It includes a first layer, a second layer, and a third layer stacked in sequence. The first layer and the third layer are made of aluminum foil, and the second layer is a foamed layer.

technical problem

However, when the size of the sound-generating device is large, thicker materials need to be used on the dome to ensure sufficient structural strength, so as to suppress high-frequency segmentation vibration, which will cause the dome to be heavier and reduce the mid-frequency sensitivity. The acoustic performance of the sound generating device is poor.

Therefore, it is necessary to provide a new sound generating device to solve the above technical problems.

Technical solutions

The purpose of the present invention is to overcome the above technical problems and provide a sound device with good reliability and excellent acoustic performance.

In order to achieve the above-mentioned object, the present invention provides a sounding device, which includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound; the vibration system includes a vibration system fixed to the The diaphragm of the basin frame and the voice coil assembly that drives the diaphragm to vibrate and produce sound. The diaphragm includes a folding ring and a dome attached and fixed to the folding ring; the folding ring includes a vibrating part and is driven by the vibration A folding ring portion bent and extended from the periphery of the portion, a fixing portion bent and extended from the folding ring portion in the direction of the basin frame, the vibrating portion surrounds a through hole, the dome covers the through hole, and the fixing Part is fixed to the basin frame, the dome is fixed to the vibrating part and completely covers the through hole, and the dome includes a cover top and a peripheral edge of the cover top that is bent and extended and is fixed to The connecting portion of the vibrating portion, the connecting portion extends obliquely from the vibrating portion toward or away from the magnetic circuit system, and the top of the cover is away from or near the side of the vibrating portion by the connecting portion It extends obliquely away from the magnetic circuit system.

More preferably, the dome top is made of alloy material.

More preferably, the position where the voice coil assembly is fixed on the dome is the connection between the connecting portion and the top of the cover.

More preferably, the connecting part extends obliquely from the vibrating part in a direction close to the magnetic circuit system, and the top of the cover is away from the magnetic circuit system from a side of the connecting part away from the vibrating part. The direction extends obliquely.

More preferably, the apex of the top of the cover is flush with the end of the connecting part close to the vibrating part.

More preferably, an end of the cover top away from the connecting portion extends to form a plane parallel to an end of the connecting portion close to the vibrating portion.

More preferably, the top of the cover extends from its end connected to the connecting portion in a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a cone.

More preferably, the top of the cover extends from its end connected to the connecting portion in a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a conical top.

More preferably, the top of the cover extends from its end connected to the connecting portion in a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a flat top.

More preferably, the dome is made by integral stamping and forming.

Beneficial effect

Compared with the related art, the sound emitting device of the present invention also provides a connection part and a cover top part on the dome top, wherein the connection part extends obliquely from the vibrating part toward or away from the magnetic circuit system, and the cover top part is moved away from or close to the magnetic circuit system by the connection part. One side of the vibrating part obliquely extends in a direction away from the magnetic circuit system. This structure increases the structural strength of the dome and suppresses the segmentation vibration, so that the high-frequency segmentation vibration suppression effect is good. In addition, the dome is made of alloy material and is fixed to the vibrating part by the dome. Since the weight of the dome is relatively light, the influence of its mass on the sensitivity of the intermediate frequency is reduced, so that the sensitivity of the intermediate frequency is high, so that the sound device is more sensitive. Excellent acoustic performance.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention;

2 is an exploded view of a part of the three-dimensional structure of the sound generating device of the present invention;

Figure 3 is a sectional view taken along line A-A in Figure 1;

4 is a schematic diagram of the first three-dimensional structure of the dome of the sound emitting device of the present invention;

Figure 5 is a sectional view taken along line B-B in Figure 4;

6 is a schematic diagram of a second three-dimensional structure of the dome of the sound emitting device of the present invention;

Figure 7 is a cross-sectional view taken along line C-C in Figure 6;

8 is a schematic diagram of a third three-dimensional structure of the dome of the sound emitting device of the present invention;

Figure 9 is a cross-sectional view taken along line D-D in Figure 8;

10 is a schematic diagram of a fourth three-dimensional structure of the dome of the sound emitting device of the present invention;

Fig. 11 is a cross-sectional view taken along the line D-D in Fig. 10;

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-3 at the same time. The present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3. The magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.

The basin frame 1 is used to fix the vibration system 2 and the magnetic circuit system 3.

The vibration system 2 includes a diaphragm 21 fixed to the basin frame 1 and a voice coil assembly 22 that drives the diaphragm 21 to vibrate and produce sound.

The diaphragm 21 includes a folding ring 211 and a dome 212 attached and fixed to the folding ring 211.

The folding ring 211 includes a vibrating portion 211 a, a folding ring portion 211 b, a fixing portion 211 c, and a through hole 210.

The vibrating portion 211a is used to connect the dome 212.

The folded ring portion 211b is bent and extended from the periphery of the vibrating portion 211a.

The fixing portion 211c is bent and extended in the direction of the basin frame 1 from the folding ring portion 211b. The fixing portion 211c is fixed to the basin frame 1.

The through hole 210 is surrounded by the vibrating portion 211a.

The dome 212 is attached and fixed to the vibrating portion 211a. The dome 212 completely covers the through hole 210. Specifically, the dome 212 includes a connecting portion 212a and a cover top 212b.

The connecting portion 212a is fixed to the vibrating portion 211a. The connecting portion 212a is bent and extends from the peripheral edge of the cover top portion 212b. Specifically, the connecting portion 212a extends obliquely toward or away from the magnetic circuit system 3 from the vibrating portion 211a. In this embodiment, the connecting portion 212a extends obliquely toward the magnetic circuit system 3 from the vibration portion 211a. This structure is beneficial to ensure that the internal volume of the sound generating device 100 is small, and is also beneficial to improve the assembly of the sound generating device 100.

The cover top portion 212b extends obliquely from a side of the connecting portion 212a away from the vibrating portion 211a in a direction away from or close to the magnetic circuit system 3. In this embodiment, the cover top portion 212b extends obliquely from the side of the connecting portion 212a away from the vibrating portion 211a in a direction away from the magnetic circuit system 3. This structure and the connecting portion 212a together make the shape of the dome 212 arched. This structure increases the structural strength of the dome 212 and suppresses the split vibration, so that the high-frequency split vibration suppression effect is good, and the acoustic performance of the sound generating device 100 is excellent.

The voice coil assembly 22 is used to drive the diaphragm 21 to vibrate and produce sound. The voice coil assembly 22 may be a simple voice coil or a voice coil and accessories connected to the voice coil. In this embodiment, the position where the voice coil assembly 22 is fixed to the dome 212 is the connection point between the connecting portion 212a and the cover top 212b.

In this embodiment, the apex of the top portion 212b of the cover is flush with the end of the connecting portion 212a close to the vibrating portion 211a. This structure makes the volume of the sound generating device 100 small, which facilitates assembly and has a wide range of applications.

In this embodiment, the orthographic projection of the top cover 212 b to the diaphragm 21 along the vibration direction completely falls within the through hole 210. This structure enables the dome 212 to make full use of the space of the through hole 210, so that the structural strength of the dome 212 is increased through the design of the dome 212, and the segmentation vibration is suppressed.

More preferably, the cover top 212b is arched. The following is illustrated by the cover top 212b with four different shapes:

The first type: please refer to FIGS. 4-5 at the same time, the end of the cover top portion 212b away from the connecting portion 212a extends to form a plane parallel to the end of the connecting portion 212a close to the vibrating portion 211a.

The second type: please refer to FIGS. 6-7 at the same time, the end of the cover top 212b connected to the connecting portion 212a extends away from the magnetic circuit system to form a cone structure, and the top of the cover forms a cone.

The third type: please refer to FIGS. 8-9 at the same time, the top of the cover 212b extends from its end connected to the connecting portion 212a in a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a conical top.

The fourth type: the top of the cover 212b extends from its end connected to the connecting portion 212a in a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a flat top.

The cover tops 212b of the above four shapes are all arched. The four structures all increase the structural strength of the dome 212 and suppress the segmentation vibration, so that the high-frequency segmentation vibration suppression effect is good, and the acoustic performance of the sound generating device 100 is excellent.

In this embodiment, the dome 212 is made of alloy material. Of course, it is not limited to this, and the dome 212 is made of a low-density and high-hardness material. The weight of the dome 212 is relatively light, so that by reducing the influence of its mass on the sensitivity of the intermediate frequency, the sensitivity of the intermediate frequency is high, and the segmentation vibration is suppressed, so that the suppression effect of the high frequency segmentation vibration is good, thereby improving the acoustic performance of the sound emitting device 100 .

In this embodiment, the dome 212 is integrally stamped and formed. This setting is conducive to subsequent assembly and easy production, and can save processing costs.

Compared with the related art, the sound emitting device of the present invention also provides a connection part and a cover top part on the dome top, wherein the connection part extends obliquely from the vibrating part toward or away from the magnetic circuit system, and the cover top part is moved away from or close to the magnetic circuit system by the connection part. One side of the vibrating part obliquely extends in a direction away from the magnetic circuit system. The structure increases the structural strength of the dome and suppresses the segmentation vibration, so that the high-frequency segmentation vibration suppression effect is good. In addition, the dome is made of alloy material and is fixed to the vibrating part by the dome. Since the weight of the dome is relatively light, the influence of its mass on the sensitivity of the intermediate frequency is reduced, so that the sensitivity of the intermediate frequency is high, so that the sound device is more sensitive. Excellent acoustic performance.

The above are only the embodiments of the present invention. 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 invention, but these all belong to the present invention. The scope of protection.

Claims

A sounding device, which includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound; the vibration system includes a diaphragm fixed to the basin frame and a drive station A voice coil assembly with a vibrating diaphragm that produces sound. The diaphragm includes a folding ring and a dome attached and fixed to the folding ring; the folding ring includes a vibrating portion, and a folding ring portion bent and extended from the periphery of the vibrating portion , A fixing part that is bent and extended from the folding ring part in the direction of the basin frame, the vibrating part surrounds a through hole, the fixing part is fixed to the basin frame, and the dome is attached and fixed to the vibration Part and completely cover the through hole, characterized in that, the dome includes a cover top and a connecting part bent and extended from the periphery of the cover top and fixed to the vibrating part, and the connecting part is formed by the The vibrating part extends obliquely toward or away from the magnetic circuit system, and the top of the cover extends obliquely from a side of the connecting part away from the vibrating part to a direction away from or close to the magnetic circuit system.
The sound emitting device according to claim 1, wherein the dome top is made of alloy material.
The sounding device according to claim 1, wherein the position where the voice coil assembly is fixed to the dome is the connection between the connecting portion and the cover top.
The sounding device according to claim 1, wherein the connecting portion extends obliquely from the vibrating portion toward the magnetic circuit system, and the top of the cover is separated from the vibrating portion by the connecting portion. One side extends obliquely away from the magnetic circuit system.
4. The sound emitting device according to claim 1, wherein the top of the cover is flush with an end of the connecting part close to the vibrating part.
The sounding device according to claim 1, wherein an end of the cover top away from the connecting portion extends to form a plane parallel to an end of the connecting portion close to the vibrating portion.
The sounding device according to claim 1, wherein the top of the cover extends from its end connected to the connecting portion to a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a cone.
The sounding device according to claim 1, wherein the top of the cover extends from its end connected to the connecting portion to a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a conical top.
The sounding device according to claim 1, wherein the top of the cover extends from its end connected to the connecting portion in a direction away from the magnetic circuit system to form a cone structure, and the top of the cover forms a flat top.
The sound emitting device according to claim 1, wherein the dome is formed by integral stamping and forming.