WO2022007175A1

WO2022007175A1 - Sound-producing device

Info

Publication number: WO2022007175A1
Application number: PCT/CN2020/114324
Authority: WO
Inventors: 严绪东; 邵涛; 顾小江
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: 2020-07-06
Filing date: 2020-09-10
Publication date: 2022-01-13
Also published as: CN212812021U

Abstract

The present utility model provides a sound-producing device, comprising a vibration system for vibrating and producing sound and a magnetic circuit system for driving the vibration system to produce sound and having a magnetic gap; the vibration system comprises a diaphragm, a voice coil inserted into the magnetic gap and driving the diaphragm to vibrate and produce sound, and a framework connecting the voice coil and the diaphragm; the framework comprises a framework body attached to the side of the diaphragm close to the voice coil, at least two mutually spaced framework support arms bent and extending from the end of the framework body away from the diaphragm to the magnetic gap, and framework connecting arms extending along the periphery of the voice coil from the end of the framework support arm away from the framework body; there are at least two framework connecting arms which are spaced apart from each other; and the framework connecting arms are fixedly connected to the voice coil. Compared with the related art, the sound-producing device of the present utility model has better reliability.

Description

sound device

technical field

The utility model relates to the field of electro-acoustic conversion, in particular to a sound-emitting device used in electronic sound box products.

Background technique

Sound-emitting devices, also known as speakers or horns, are used in speakers to convert audio signals into sound for playback.

The sound-generating device of the related art includes a vibration system for vibrating and sounding, and a magnetic circuit system that drives the vibration system to vibrate and sound and has a magnetic gap. The vibration system includes a vibrating membrane, inserted in the magnetic gap and driving the vibration. The diaphragm vibrates a voice coil that produces sound and a skeleton connecting the voice coil and the diaphragm.

technical problem

However, in the sound-emitting device of the related art, the voice coil is only glued and fixed with one end of the skeleton or its side, and the glued area is small, which leads to the high-power vibration and sound of the sound-emitting device, and the voice coil and the skeleton are easily separated. , the reliability is not good.

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

technical solutions

The purpose of the utility model is to provide a sound device with better reliability.

In order to achieve the above purpose, the present invention provides a sound-generating device, which includes a vibration system for vibrating and sounding, and a magnetic circuit system that drives the vibration system to vibrate and sound and has a magnetic gap. A voice coil that is arranged in the magnetic gap and drives the vibrating membrane to vibrate and sound, and a skeleton connecting the voice coil and the vibrating membrane, the skeleton includes a side attached to the vibrating membrane close to the voice coil The skeleton body, at least two mutually spaced skeleton support arms bent and extended from the end of the skeleton body away from the diaphragm to the magnetic gap, and the end of the skeleton support arm away from the skeleton body along the The skeleton connecting arms extending from the outer periphery of the voice coil include at least two skeleton connecting arms and are spaced apart from each other, and the skeleton connecting arms are fixedly connected with the voice coil.

Preferably, the skeleton connecting arm is symmetrically arranged with respect to the skeleton supporting arm, and the skeleton supporting arm is arranged around the voice coil and is abutted and fixed on the outer peripheral side of the voice coil.

Preferably, the frame connecting arm is fixed on the side of the voice coil close to the diaphragm.

Preferably, the orthographic projection of the skeleton connecting arm to the voice coil along the vibration direction of the diaphragm completely falls within the range of the voice coil.

Preferably, the skeleton support arm includes a first section bent and extended from the skeleton body toward the magnetic gap, and the first section is bent along the outer side of the voice coil in a direction close to the diaphragm The extended second segment, one end of the second segment away from the first segment is connected to the outer side of the frame connecting arm to form an avoidance step.

Preferably, each of the frame connecting arm and the frame supporting arm includes three and is arranged at equal distances from each other.

Preferably, the skeleton body is annular, the diaphragm includes a first annular portion and a second annular portion, and the first annular portion surrounds the second annular portion The skeleton body is located between the first folding ring part and the second folding ring part, and the outer side of the skeleton body is connected with the first folding ring part, and the skeleton body is The inner side is connected with the second folding ring part.

Preferably, the sound-generating device further includes a basin frame for supporting and fixing the magnetic circuit system and the vibration system, and the outer side of the first folded ring portion and the inner side of the second folded ring portion are both fixed to the Describe the basin rack.

Preferably, the basin frame includes a first surrounding wall with a receiving space, a second surrounding wall surrounding the first surrounding wall and spaced from the first surrounding wall, and connecting the first surrounding wall and the connecting wall of the second enclosure wall, the magnetic circuit system is accommodated in the accommodation space, the outer side of the first folded ring portion and the inner side of the second folded ring portion are respectively fixed to the second enclosure The upper end of the wall and the first surrounding wall, the first surrounding wall is provided with an escape portion passing through it and used for avoiding the frame support arm.

Preferably, the sound-generating device further comprises a sealing ring which is press-fitted on the inner side of the second folded ring portion away from the basin frame and is arranged around the periphery of the magnetic circuit system.

Preferably, the magnetic circuit system includes a first magnetic bowl, a magnetic steel unit accommodated and fixed in the first magnetic bowl, and a second magnetic bowl covered on the magnetic steel unit, the magnetic steel unit is connected to the magnetic steel unit. The first magnetic bowl is spaced to form the magnetic gap, the first magnetic bowl and the second magnetic bowl are both provided with a gap passing through them and used to avoid the frame support arm, and the sealing ring surrounds the The peripheral edge of the second magnetic bowl is provided.

Preferably, the voice coil includes a voice coil lead extending outward along the side of the bobbin close to the magnetic circuit system, and the bobbin further includes a side of the bobbin away from the vibrating membrane that is close to the vibrating diaphragm. A groove formed by a depression of the membrane, and the voice coil lead is accommodated in the groove.

Preferably, the sound-generating device further includes a flexible circuit board fixed on the side of the basin frame away from the vibrating membrane, and the voice coil lead is electrically connected to the flexible circuit board.

beneficial effect

Compared with the related art, in the sound-emitting device of the present invention, the skeleton includes a skeleton body attached to the side of the diaphragm close to the voice coil, and the end of the skeleton body away from the diaphragm goes to the other side. at least two mutually spaced skeleton support arms extending from the inter-magnetic bending gap, and a skeleton connecting arm extending along the outer circumference of the voice coil from an end of the skeleton supporting arm away from the skeleton body, the skeleton connecting arm comprising: At least two are arranged at intervals from each other, and the skeleton connecting arm is fixedly connected with the voice coil; the skeleton is added with a skeleton connecting arm connected with the voice coil, that is, the gluing area of the voice coil and the skeleton is increased, which improves the The bonding force of the voice coil and the skeleton can improve the problem of separation of the voice coil skeleton under the high-power vibration of the sound-emitting device, and the reliability is better.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is the stereoscopic structure schematic diagram of the sound-emitting device of the present invention;

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

Fig. 3 is a sectional view along line A-A in Fig. 1;

FIG. 4 is a schematic three-dimensional structure diagram of the skeleton of the sound-emitting device of the present invention;

5 is a schematic diagram of the skeleton and the assembly structure of the voice coil of the sound-emitting device of the present invention;

6 is an exploded view of another part of the three-dimensional structure of the present utility model, wherein (6a) is an assembly schematic diagram of a skeleton, a basin frame, a voice coil lead and a flexible circuit board, and (6b) is an enlarged schematic diagram of A in (6a).

Embodiments of the present invention

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, but not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIGS. 1-6 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 supported and fixed on the basin frame 1, a sealing ring 4 and a flexible circuit board 5. The magnetic circuit system 3 has a magnetic gap 30 . It should be noted that the vibration system 2 may also be fixed to the magnetic circuit system 3 , and is not limited to being fixed to the basin frame 1 .

The basin frame 1 includes a first surrounding wall 11 having a receiving space 110 , a third surrounding wall 12 and a second surrounding wall arranged around the first surrounding wall 11 and spaced from the first surrounding wall 11 . 13, and the connecting wall 14 connecting the first enclosure wall 11, the third enclosure wall 12 and the second enclosure wall 13, the first enclosure wall 11, the third enclosure wall 12 and the second enclosure wall 14 The surrounding walls 13 are arranged in sequence from the inside to the outside, and the first surrounding wall 11 is provided with an escape portion 111 penetrating the first surrounding wall 11 for avoiding the frame support arm 231 below.

The vibration system 2 is used for vibrating and producing sound, and includes a diaphragm 21 , a ring-shaped voice coil 22 inserted in the magnetic gap 30 and used to drive the diaphragm 21 to vibrate and produce sound, and a skeleton 23 . The coil 22 includes a voice coil lead 221 for connecting electrical signals to the outside world. The voice coil lead 221 extends outward along the side of the bobbin 23 close to the magnetic circuit system 3. The bobbin 23 below includes a distance from the bobbin 23 away from the vibration. One side of the diaphragm 21 is close to the groove 23a formed by the depression of the diaphragm 21, and the voice coil lead 221 is accommodated in the groove 23a, that is, the voice coil lead 221 is arranged inside the frame 23, and does not occupy the sound. The space of the device 100 and the voice coil lead 23a do not interfere with other components, and the layout is more reasonable. The flexible circuit board 5 is clamped and fixed on the side of the second surrounding wall 13 and the third surrounding wall 12 away from the diaphragm 21. Of course, the flexible circuit board 5 can also be fixed on other positions of the basin frame 1, so the The voice coil lead 221 is electrically connected to the flexible circuit board 5 to provide electrical signals for the entire sound generating device 100 .

The diaphragm 21 includes a first annular portion 2121 and a second annular portion 2122. The first annular portion 2121 surrounds the second annular portion 2122 and is spaced apart from each other; below The skeleton body 233 is located between the first folding ring part 2121 and the second folding ring part 2122, and the outer side of the skeleton body 233 is connected with the first folding ring part 2121. The inner side is connected to the second folding ring part 2122; the outer side of the first folding ring part 2121 and the inner side of the second folding ring part 2122 are both fixed to the basin frame 1, specifically, the first folding ring part The outer side of the 2121 and the inner side of the second folded ring portion 2122 are respectively fixed to the upper ends of the second surrounding wall 13 and the first surrounding wall 11 . That is, the skeleton body 233 acts as a dome, which saves the number of parts and assembling processes, saves costs, and the strength of the entire diaphragm 21 is improved, and the vibration effect of the diaphragm 21 is better.

One end of the frame 23 is connected to the ball diaphragm 21 , and the other end of the frame 23 is connected to the voice coil 22 .

The skeleton 23 includes a skeleton body 233 attached to the side of the diaphragm 21 close to the voice coil 22 , and a skeleton body 233 is bent and extended from the end of the skeleton body 233 away from the diaphragm 21 to the magnetic gap 30 . At least two skeleton supporting arms 231 spaced apart from each other and a skeleton connecting arm 232 extending along the outer circumference of the voice coil 22 from one end of the skeleton supporting arm 231 away from the skeleton body 233, the skeleton connecting arm 232 includes at least two The skeleton connecting arms 232 are fixedly connected to the voice coil 22 , and in this embodiment, the skeleton connecting arms 232 are glued and fixed to the voice coil 22 . The skeleton 23 is added with a skeleton connecting arm 232 connected to the voice coil 22, that is, the glued area of the voice coil 22 and the skeleton 23 is increased, the bonding force of the voice coil 22 and the skeleton 23 is improved, and the high power of the sounding device 100 can be improved. The problem of separation of the voice coil 22 and the skeleton 23 under vibration and sound, the reliability is better.

Specifically, the skeleton connecting arms 232 are symmetrically arranged with respect to the skeleton supporting arms 231 , and the skeleton supporting arms 231 are arranged around the voice coil 22 and are abutted and fixed on the outer peripheral side of the voice coil 22 , that is, a plurality of The frame connecting arm 232 and the plurality of frame supporting arms 231 are evenly distributed on the outer side of the frame connecting arm 232 , the support effect is better, the force is more uniform, and the frame 23 can be prevented from breaking under high power vibration.

The frame connecting arm 232 is fixed on the side of the voice coil 22 close to the diaphragm 21 . Preferably, the frame connecting arm 232 is an orthographic projection of the voice coil 22 along the vibration direction of the diaphragm 21 . It completely falls within the range of the voice coil 22 , that is, under the condition of ensuring the glued area between the voice coil 22 and the skeleton 23 , the material and volume of the skeleton connecting arm 232 are reduced, the cost is reduced, and the space utilization rate is better.

In this embodiment, the frame connecting arms 232 and the frame supporting arms 231 each include three and are arranged at equal distances from each other. Specifically, the skeleton support arm 231 includes a first section 2311 bent and extended from the skeleton body 233 toward the magnetic gap 30 , and the first section 2311 is close to the outer side of the voice coil 22 by the first section 2311 . The second section 2312 is bent and extended in the direction of the diaphragm 21. The end of the second section 2312 away from the first section 2311 is connected to the outer side of the frame connecting arm 232 to form an avoidance step 230. A plurality of avoidance steps 230 The avoidance space is provided for the voice coil 22 , and the avoidance step 230 is attached to the upper end of the voice coil 22 , which can prevent the voice coil 22 from swinging left and right while the space utilization rate is higher, thereby improving the reliability of the sounding device 100 .

The magnetic circuit system 3 is accommodated in the accommodating space 110 and is used to drive the vibration system 2 to vibrate and emit sound. The magnetic steel unit 32 in 31, and the second magnetic bowl 33 covered on the magnetic steel unit 32, the magnetic steel unit 32 and the first magnetic bowl 31 are spaced to form the magnetic gap 30, the A magnetic bowl 31 and the second magnetic bowl 33 are both provided with a gap 34 passing through them and used to avoid the frame support arm 231 .

The sealing ring 4 is press-fitted on the inner side of the second folding ring portion 2122 away from the basin frame 1 , and the sealing ring 4 presses the inner side of the second folding ring portion 2122 on the basin frame 1 , Meanwhile, the sealing ring 4 is arranged around the periphery of the second magnetic bowl 33, and the sealing effect is better.

Compared with the related art, in the sound-emitting device of the present invention, the skeleton includes a skeleton body attached to the side of the diaphragm close to the voice coil, and the end of the skeleton body away from the diaphragm goes to the other side. At least two mutually spaced skeleton support arms bent and extended from the magnetic gap and a skeleton connecting arm extending along the outer circumference of the voice coil from the end of the skeleton supporting arm away from the skeleton body, all the skeleton connecting arms are in sequence The connection forms an integral annular structure, and the skeleton connecting arm is fixedly connected with the voice coil; the skeleton adds a skeleton connecting arm connected with the voice coil, that is, the glueing area of the voice coil and the skeleton is increased, and the voice coil is improved. The bonding force with the skeleton can improve the problem of separation of the voice coil skeleton under the high-power vibration of the sound-emitting device, and the reliability is better.

The above are only the embodiments of the present utility model. It should be pointed out 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 belong to The scope of protection of the utility model.

Claims

A sound-generating device, comprising a vibration system for vibrating and sounding and a magnetic circuit system for driving the vibration system to vibrate and sound and having a magnetic gap, the vibration system comprising a vibrating membrane, inserted in the magnetic gap and driving the A voice coil with a vibrating membrane vibrating and producing sound, and a skeleton connecting the voice coil and the vibrating membrane, wherein the skeleton comprises a skeleton body attached to the side of the vibrating membrane close to the voice coil, At least two mutually spaced skeleton support arms bent and extended toward the magnetic gap from one end of the skeleton body away from the vibrating membrane and the end of the skeleton support arm away from the skeleton body extending along the outer circumference of the voice coil The skeleton connecting arm includes at least two skeleton connecting arms and are spaced apart from each other, and the skeleton connecting arm is fixedly connected with the voice coil.
The sound-emitting device according to claim 1, wherein the skeleton connecting arm is symmetrically arranged with respect to the skeleton supporting arm, and the skeleton supporting arm is arranged around the voice coil and abuts against the sound coil fixed to the voice coil. peripheral side.
The sound-generating device according to claim 2, wherein the frame connecting arm is fixed to a side of the voice coil close to the diaphragm.
The sound-generating device according to claim 3, wherein the orthographic projection of the skeleton connecting arm to the voice coil along the vibration direction of the diaphragm completely falls within the range of the voice coil.
The sound-generating device according to claim 3, wherein the skeleton support arm comprises a first section bent and extended from the skeleton body to the direction of the magnetic gap, and the first section along the voice coil The outer side of the second segment is bent and extended toward the direction of the vibrating membrane, and the end of the second segment away from the first segment is connected to the outer side of the frame connecting arm to form an avoidance step.
The sound-generating device according to claim 2, wherein each of the skeleton connecting arms and the skeleton supporting arms includes three and is arranged at an equal distance from each other.
The sound-generating device according to claim 1, wherein the skeleton body is annular, the diaphragm includes a first annular portion and a second annular portion, and the first annular portion is annular. A folding ring part surrounds the second folding ring part and is spaced apart from each other; the frame body is located between the first folding ring part and the second folding ring part, and the outer side of the frame body is connected to the first folding ring part. A folding ring part is connected, and the inner side of the frame body is connected with the second folding ring part.
The sound-generating device according to claim 7, characterized in that, the sound-generating device further comprises a basin frame for supporting and fixing the magnetic circuit system and the vibration system, the outer side of the first folding ring part and the The inner side of the second folding ring portion is fixed to the basin frame.
The sound-generating device according to claim 8, wherein the basin frame comprises a first surrounding wall having a receiving space, a first surrounding wall surrounding the first surrounding wall and spaced from the first surrounding wall. Two enclosure walls and a connecting wall connecting the first enclosure wall and the second enclosure wall, the magnetic circuit system is accommodated in the accommodating space, the outer side of the first enclosure and the second enclosure The inner sides of the parts are respectively fixed on the upper ends of the second surrounding wall and the first surrounding wall, and the first surrounding wall is provided with an escape portion passing through it and used to avoid the frame support arm.
The sound-generating device according to claim 9, characterized in that, the sound-generating device further comprises a sealing ring which is pressed and arranged on the inner side of the second folded ring portion away from the basin frame and is arranged around the periphery of the magnetic circuit system .
The sound-generating device according to claim 10, wherein the magnetic circuit system comprises a first magnetic bowl, a magnetic steel unit accommodated and fixed in the first magnetic steel bowl, and a third magnetic steel unit covered on the magnetic steel unit. Two magnetic bowls, the magnetic steel unit and the first magnetic bowl are spaced apart to form the magnetic gap, and the first magnetic bowl and the second magnetic bowl are both provided with passing through them and used to avoid the skeleton support the gap between the arms, and the sealing ring is arranged around the periphery of the second magnetic bowl.
The sound-generating device according to claim 9, wherein the voice coil comprises a voice coil lead extending outward along a side of the bobbin close to the magnetic circuit system, and the bobbin further comprises a lead from the bobbin away from the surrounding One side of the diaphragm is close to the groove formed by the depression of the diaphragm, and the lead wire of the voice coil is accommodated in the groove.
The sound-generating device according to claim 12, characterized in that, the sound-generating device further comprises a flexible circuit board fixed on the side of the basin frame away from the vibrating membrane, and the voice coil leads are electrically connected to the flexible circuit board. connect.