WO2022062003A1

WO2022062003A1 - Sound production unit and loudspeaker box

Info

Publication number: WO2022062003A1
Application number: PCT/CN2020/122062
Authority: WO
Inventors: 吴军; 杨虎虎; 任圣
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: 2020-09-25
Filing date: 2020-10-20
Publication date: 2022-03-31
Also published as: CN213126464U

Abstract

The present application provides a sound production unit and a loudspeaker box, comprising a frame, a vibration system fixed on the frame, and a magnetic circuit system used for driving the vibration system to vibrate and produce sound. The frame comprises a framework and a support plate provided in the framework. The magnetic circuit system comprises a first magnetic circuit system received in the framework and located on one side of the support plate and a second magnetic circuit system received in the framework and located on the other side of the support plate. The vibration system comprises a first vibration system corresponding to the first magnetic circuit system and fixed at one end of the framework, and a second vibration system corresponding to the second magnetic circuit system and fixed at the other end of the framework. According to the sound production unit, two groups of sound production elements are integrally assembled, and the structure is simple and stable.

Description

A sound generating unit and speaker box

technical field

The present application relates to the technical field of electro-acoustic conversion, and in particular, to a sound-generating unit and a speaker box.

Background technique

With the rapid development of electronic information technology, more and more speaker boxes are used in various electronic products, especially mobile communication devices that are widely used by people. People not only care about their miniaturization and multi-function, but also require their voice effects. high quality.

technical problem

The loudspeaker box in the prior art generally improves its loudness by arranging two groups of sound-emitting elements, so as to avoid that the loudspeaker box cannot meet people's requirements for sound loudness because it is in a relatively noisy place. However, the built-in two sets of sound-generating elements result in a more complicated structure and lower reliability of the speaker box.

Therefore, it is necessary to provide a new type of sound generator and speaker box to solve the above problems.

technical solutions

The purpose of the present application is to provide a sound-generating unit and a speaker box. The sound-generating unit assembles two groups of sound-generating elements into one, and has a simple and stable structure.

To this end, according to the first aspect, an embodiment provides a sound-generating unit, including: the sound-generating unit includes a basin frame, a vibration system fixed on the basin frame, and a vibration system for driving the vibration system to vibrate and sound A magnetic circuit system, the basin frame includes a frame and a support plate arranged in the frame; the magnetic circuit system includes a first magnetic circuit system accommodated in the frame and located on one side of the support plate; A second magnetic circuit system accommodated in the frame and located on the other side of the support plate; the vibration system includes a first vibration system corresponding to the first magnetic circuit system and fixed at one end of the frame and a first vibration system corresponding to the first magnetic circuit system and fixed to one end of the frame. The second magnetic circuit system is fixed to the second vibration system at the other end of the frame.

As an improvement, the first magnetic circuit system includes a first main magnetic steel and a first auxiliary magnetic steel arranged around the first main magnetic steel; the second magnetic circuit system includes a second main magnetic steel and a surrounding magnetic steel a second auxiliary magnet provided by the second main magnet;

The support plate includes a first support portion sandwiched between the first main magnet steel and the second main magnet steel, and a first support portion extending from the first support portion toward the frame and sandwiched at the A second support portion between the first secondary magnet and the second secondary magnet.

As an improvement, the first magnetic circuit system further includes a first main pole core attached to the first main magnetic steel, and a first main pole core disposed around the first main pole core and attached to the first auxiliary The first secondary pole core on the magnet;

The second magnetic circuit system further includes a second main pole core attached to the second main magnetic steel and a second main pole core disposed around the second main pole core and attached to the second auxiliary magnetic steel. Secondary pole core.

As an improvement, the first secondary pole core and the second secondary pole core are both welded and fixed to the frame.

As an improvement, the first secondary pole core includes a plurality of first main body parts correspondingly attached to the first secondary magnetic steel and a first connection connected between two adjacent first main body parts Department;

The second secondary pole core includes a plurality of second main body parts correspondingly attached to the second secondary magnetic steel and a second connection part connected between two adjacent second main body parts.

As an improvement, two adjacent first main body parts and the first connecting part form a first through opening, and two adjacent first auxiliary magnetic steels form a second through opening, and the first through opening is formed. the port and the second through port form a first pressure relief channel;

Two adjacent second main body parts and the second connecting part form a third through port, and two adjacent second secondary magnetic steels form a fourth through port, and the third through port is connected to the first through hole. The four-way port forms a second pressure relief channel;

A pressure relief hole communicated with the first pressure relief passage and the second pressure relief passage is formed through the frame.

As an improvement, two adjacent second support parts form a fifth port for communicating with the first pressure relief passage and the second pressure relief passage, the first pressure relief passage, the second pressure relief passage The fifth through port and the second pressure relief passage form a pressure relief passage.

According to a second aspect, an embodiment provides a speaker box, comprising a casing with a cavity and a sound-generating unit accommodated in the cavity, and the sound-generating unit is described in the first aspect of the application In the above-mentioned sound-generating unit, the shell is provided with a sound-outlet hole arranged on the same side for the sound-generating unit to emit sound.

As an improvement, the housing includes a lower cover plate having the cavity and an upper cover plate covering the lower cover plate, and a bottom wall of the lower cover plate extends toward the upper cover plate to form a partition wall , the dividing wall is provided with a through hole, and the cavity is divided by the dividing wall into a receiving cavity for accommodating the sounding unit and a pressure relief hole communicating with the sounding unit through the through hole the rear voice.

As an improvement, the first vibration system, the partition wall and the upper cover plate form a first front acoustic cavity, and the second vibration system, the partition wall and the lower cover plate form a second front acoustic cavity and the sound outlet holes respectively communicated with the first front sound cavity and the second front sound cavity are formed on the lower cover plate.

beneficial effect

The beneficial effects of the present application are: in the present application, the first magnetic circuit system is fixed in the frame through one side of the support plate, and the first vibration system corresponding to the first magnetic circuit system is fixed at one end of the frame; through the support plate The second magnetic circuit system is fixed on the frame 111 on the other side, and the second vibration system corresponding to the second magnetic circuit system is fixed on the other end of the frame. , The second magnetic circuit system and the second vibration system are assembled into a symmetrical sounding unit, with a simple and stable structure; at the same time, the first magnetic circuit system drives the first vibration system to vibrate and sound, and the second magnetic circuit system drives the second vibration. The system vibrates and emits sound, and the symmetrical sound-generating unit has the acoustic performance of two sets of sound-generating elements. That is, through the technical solution, the sound-generating unit integrates two groups of sound-generating elements, and the structure is simple and stable.

Description of drawings

1 is a schematic diagram of the overall structure of a speaker box according to an embodiment of the application;

Fig. 2 is the exploded structure schematic diagram of the speaker box in Fig. 1;

Fig. 3 is the structural schematic diagram of the sound-generating unit of the speaker box in Fig. 1;

Fig. 4 is the exploded structure schematic diagram of the sounding monomer of Fig. 3;

Fig. 5 is the sectional view of the direction B-B in Fig. 3;

FIG. 6 is a cross-sectional view taken along the direction A-A in FIG. 1 .

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 present application may be implemented in various other 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.

The present application provides a speaker box 100, referring to FIG. 1 and FIG. 2, which includes a housing 20 having a cavity 211, a sound generating unit 10 accommodated in the cavity 211, and a sound outlet hole is formed through the housing 20 213 , the sound-generating unit 10 vibrates and emits sound and emits sound through the sound-emitting hole 213 .

The speaker box 100 in the embodiment of the present application is configured with a symmetrical sound-generating unit 10. Please refer to FIGS. 3 to 5. The sound-generating unit 10 includes a basin frame 11, a vibration system 12 fixed on the basin frame 11, and a The magnetic circuit system 13 for driving the vibration system 12 to vibrate and sound.

The basin frame 11 includes a frame 111 and a support plate 112 disposed in the frame 111 ; the magnetic circuit system 13 includes a first magnetic circuit system 131 accommodated in the frame 111 and located on one side of the support plate 112 , and a first magnetic circuit system 131 accommodated in the frame 111 and a second magnetic circuit system 132 located on the other side of the support plate 112; the vibration system 12 includes a first vibration system 121 corresponding to the first magnetic circuit system 131 and fixed to one end of the frame 111 and a second magnetic circuit system 132 corresponding to and fixed to the second vibration system 122 at the other end of the frame 111 .

In this application, the first magnetic circuit system 131 is fixed in the frame 111 through one side of the support plate 112 , and the first vibration system 121 corresponding to the first magnetic circuit system 131 is fixed at one end of the frame 111 ; through the support plate 112 On the other side, the second magnetic circuit system 132 is fixed in the frame 111 , and the second vibration system 122 corresponding to the second magnetic circuit system 132 is fixed on the other end of the frame 111 . The circuit system 131, the first vibration system 121, the second magnetic circuit system 132 and the second vibration system 122 are assembled into a symmetrical sound-generating unit 10 with a simple and stable structure; at the same time, the first magnetic circuit system 131 drives the first vibration The system 121 vibrates to produce sound, and the second magnetic circuit system 132 drives the second vibration system 122 to vibrate and produce sound. The symmetrical sound-generating unit 10 has the acoustic properties of two sets of sound-generating elements. That is, through the technical solution, the sound-generating unit 10 assembles two sets of sound-generating elements into one body, and the structure is simple and stable.

Specifically, the first vibration system 121 includes a first diaphragm 1211 and a first voice coil 1212. The first diaphragm 1211 includes a first fold ring 1211a fixed to one end of the frame 111 on the outside and fixed to the inner side of the first fold ring 1211a The first dome 1211b, the first voice coil 1212 is fixed under the first dome 1211b; the first magnetic circuit system 131 includes a first main magnetic steel 1311 and a first auxiliary magnetic steel arranged around the first main magnetic steel 1311 1312, the first main magnetic steel 1311 and the first secondary magnetic steel 1312 form a first magnetic gap 131a, and the first voice coil 1212 is at least partially inserted in the first magnetic gap 131a. The second vibration system 122 includes a second diaphragm 1221 and a second voice coil 1222. The second diaphragm 1221 includes a second fold ring 1221a fixed to the other end of the frame 111 and a second fold ring 1221a fixed to the inner side of the second fold ring 1221a. The second dome 1221b, the second magnetic circuit system 132 includes a second main magnet 1321 and a second auxiliary magnet 1322 arranged around the second main magnet 1321, the first main magnet 1311 and the second auxiliary magnet 1322 form the second main magnet 1321. Two magnetic gaps 132a, the second voice coil 1222 is at least partially inserted in the second magnetic gap 132a.

Referring to FIG. 4 , in a specific embodiment, the support plate 112 includes a first support portion 1121 sandwiched between the first main magnet steel 1311 and the second main magnet steel 1321 , and a first support portion 1121 faces the frame from the first support portion 1121 . The second support portion 1122 is formed by extending from 111 and sandwiched between the first secondary magnetic steel 1312 and the second secondary magnetic steel 1322 . That is, the first main magnet 1311 is attached to one side of the first support portion 1121 , the second main magnet 1321 is attached to the other side of the first support portion 1121 , and the first auxiliary magnet 1312 is attached to the second support portion On one side of the 1122 , the second auxiliary magnetic steel 1322 is attached to the other side of the second supporting portion 1122 .

In addition, the first magnetic circuit system 131 further includes a first main pole core 1313 attached to the first main magnetic steel 1311 and a first main pole core 1313 arranged around the first main pole core 1313 and attached to the first auxiliary magnetic steel 1312 Auxiliary pole core 1314; the second magnetic circuit system 132 further includes a second main pole core 1323 attached to the second main magnetic steel 1321 and a second main pole core 1323 disposed around the second main pole core 1323 and attached to the second auxiliary magnetic steel 1322 The second secondary pole core 1324.

In one embodiment, the first secondary pole core 1314 and the second secondary pole core 1324 are both welded and fixed to the frame 111 to enhance the reliability of the overall structure of the sounding unit 10 .

Continuing to refer to FIG. 4 , the first secondary pole core 1314 includes a plurality of first main body portions 1314 a correspondingly attached to the first secondary magnetic steel 1312 ; the first primary magnetic steel 1311 has a rectangular structure, and the first secondary magnetic steel 1312 is four For example, four first secondary magnetic steels 1312 are disposed around the first main magnetic steel 1311 , and there may be four first main body portions 1314 a , which are attached to the four first secondary magnetic steels 1312 in a one-to-one correspondence.

The second secondary pole core 1324 includes a plurality of second main body portions 1324 a correspondingly attached to the second secondary magnetic steel 1322 . Taking the second main magnetic steel 1321 as a rectangular structure and four second auxiliary magnetic steels 1322 as an example, the four second auxiliary magnetic steels 1322 are arranged around the second main magnetic steel 1321, and the second main body portion 1324a may be four. Each of them is attached to the four second magnetic steels 1322 in a one-to-one correspondence.

In one embodiment, the first secondary pole core 1314 includes a first connecting portion 1314b connected between two adjacent first main body portions 1314a, and the first connecting portion 1314b connects several first main body portions 1314a into a whole , which is beneficial for the plurality of first main body parts 1314a to be attached to the first auxiliary magnetic steel 1312 synchronously and stably.

In one embodiment, the second secondary pole core 1324 includes a second connection portion 1324b connected between two adjacent second main body portions 1324a, and the second connection portion 1324b connects several second main body portions 1324a into a whole , which is beneficial for the plurality of second main body parts 1324a to be attached to the second auxiliary magnetic steel 1322 synchronously and stably.

Referring to FIG. 4 and FIG. 5 , two adjacent first main body parts 1314 a and the first connecting part 1314 b form a first through port 1411 , two adjacent first auxiliary magnetic steels 1312 form a second through port 1412 , and the first through port 1412 is formed. The port 1411 and the second through port 1412 form the first pressure relief channel 141; the adjacent two second main body parts 1324a and the second connecting part 1324b form the third through port 1421, and the adjacent two second auxiliary magnets 1322 form the first pressure relief channel 141. The fourth through port 1422, the third through port 1421 and the fourth through port 1422 form a second pressure relief channel 142;

The first through port 1411 and the second through port 1412 form a first pressure relief channel 141, and the pressure relief hole 111a communicates with the first pressure relief channel 141. When the first diaphragm 1211 vibrates, the gas under the first diaphragm 1211 The pressure is released through the first pressure relief channel 141 and the pressure relief hole 111a in sequence; the third through port 1421 and the fourth through port 1422 form the second pressure relief channel 142, and the pressure relief hole 111a is communicated with the second pressure relief channel 142. When When the second diaphragm 1221 vibrates, the gas under the second diaphragm 1221 releases pressure through the second pressure relief channel 142 and the pressure relief hole 111 a in sequence, thereby improving the low-frequency acoustic performance of the sounding unit 10 .

In one embodiment, two adjacent second support parts 1122 form a fifth through port 143 for communicating with the first pressure relief channel 141 and the second pressure relief channel 142 . The first pressure relief channel 141 , the fifth through hole 143 The port 143 and the second pressure relief passage 142 form the pressure relief passage 14 .

The pressure relief holes 111a communicate with the pressure relief passage 14. There are four pressure relief holes 111a and are spaced apart from each other. Taking the frame 111 as an example of a rectangular structure, the four pressure relief holes 111a are respectively arranged at four corners of the frame 111. Of course, The number and position of the pressure relief holes 111a are not limited to this.

Referring to FIGS. 2 and 6 , in an embodiment of a speaker box 100 , the housing 20 includes a lower cover 21 having a cavity 211 and an upper cover 22 covering the lower cover 21 . The bottom of the lower cover 21 The wall extends toward the upper cover plate 22 to form a partition wall 212 , the partition wall 212 is provided with a through hole, and the cavity 211 is divided by the partition wall 212 into a receiving cavity 2111 for accommodating the sounding unit 10 , and a through hole and the sounding unit 10 . The pressure relief hole 111a communicates with the rear acoustic cavity 2112. After the sounding unit 10 is accommodated in the accommodating cavity 2111, the pressure relief channel 14 of the sounding unit 10 communicates with the rear acoustic cavity 2112 through the pressure relief hole 111a and the through hole. Therefore, the gas under the first diaphragm 1211 sequentially passes through the pressure relief channel 14. The pressure relief hole 111a and the through hole are released into the rear acoustic cavity 2112, and the gas under the second diaphragm 1221 is successively released into the rear acoustic cavity 2112 through the pressure relief channel 14, the pressure relief hole 111a and the through hole, so as to improve the The low frequency acoustic performance of the speaker enclosure 100 is improved.

In a specific embodiment of the speaker box 100, the first vibration system 121, the partition wall 212 and the upper cover plate 22 form a first front acoustic cavity 2111a, and the second vibration system 122, the partition wall 212 and the lower cover plate 21 form a second sound cavity 2111a. The front acoustic cavity 2111b and the lower cover 21 are provided with sound outlet holes 213 respectively communicating with the first front acoustic cavity 2111a and the second front acoustic cavity 2111b. The first front acoustic cavity 2111a and the second front acoustic cavity 2111b are used for sound production, that is, the speaker box 100 can simultaneously drive the first vibration system 121 through the first magnetic circuit system 131 to emit sound through the first front acoustic cavity 2111a and the sound outlet hole 213, and drive the second vibration system 122 through the second front acoustic cavity 2111b and through the second magnetic circuit system 132 at the same time. The sound outlet 213 emits sound to increase the loudness of the speaker box 100 .

There may be two or more sound outlet holes 213 , and the two or more sound outlet holes 213 are arranged on the same side, which achieves the effect of increasing the loudness (ie volume) of the sound produced by the speaker box 100 .

The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, all It is considered to be the range described in this specification.

The above examples only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims

A sound-generating unit, the sound-generating unit includes a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and sound, characterized in that the basin frame includes a frame and a set of a support plate in the frame; the magnetic circuit system includes a first magnetic circuit system accommodated in the frame and located on one side of the support plate, and a magnetic circuit system accommodated in the frame and located on the support plate The second magnetic circuit system on the other side; the vibration system includes a first vibration system corresponding to the first magnetic circuit system and fixed to one end of the frame and a first vibration system corresponding to the second magnetic circuit system and fixed to the frame the second vibration system at the other end.
The sound-generating unit according to claim 1, characterized in that,

The first magnetic circuit system includes a first main magnetic steel and a first auxiliary magnetic steel arranged around the first main magnetic steel; the second magnetic circuit system includes a second main magnetic steel and a second main magnetic steel surrounding the second main magnetic steel The second pair of magnets set by the magnets;

The support plate includes a first support portion sandwiched between the first main magnet steel and the second main magnet steel, and a first support portion extending from the first support portion toward the frame and sandwiched at the A second support portion between the first secondary magnet and the second secondary magnet.
The sound-generating unit according to claim 2, wherein the first magnetic circuit system further comprises a first main pole core attached to the first main magnetic steel and surrounding the first main pole core a first secondary pole core arranged and attached to the first secondary magnetic steel;

The second magnetic circuit system further includes a second main pole core attached to the second main magnetic steel and a second main pole core disposed around the second main pole core and attached to the second auxiliary magnetic steel. Secondary pole core.
The sound-generating unit according to claim 3, wherein the first auxiliary pole core and the second auxiliary pole core are both welded and fixed to the frame.
The sound-generating unit according to claim 4, wherein the first secondary pole core comprises a plurality of first main body parts correspondingly attached to the first secondary magnetic steel and connected to two adjacent said a first connecting portion between the first body portions;

The second secondary pole core includes a plurality of second main body parts correspondingly attached to the second secondary magnetic steel and a second connection part connected between two adjacent second main body parts.
The sound-generating unit according to claim 5, wherein two adjacent first main body parts and the first connecting part form a first through opening, and two adjacent first auxiliary magnetic steels form a second through port, the first through port and the second through port form a first pressure relief channel;

Two adjacent second main body parts and the second connecting part form a third through port, and two adjacent second secondary magnetic steels form a fourth through port, and the third through port is connected to the first through hole. The four-way port forms a second pressure relief channel;

A pressure relief hole communicated with the first pressure relief passage and the second pressure relief passage is formed through the frame.
The sound-generating unit according to claim 6, wherein two adjacent second support parts form a fifth port for communicating with the first pressure relief passage and the second pressure relief passage, The first pressure relief passage, the fifth through port, and the second pressure relief passage form a pressure relief passage.
A loudspeaker box, the loudspeaker box comprises a shell with a cavity and a sound-generating unit accommodated in the cavity, wherein the sound-generating unit is the one described in any one of claims 1-7 The sound-generating unit is provided with a sound-emitting hole arranged on the same side for the sound-generating unit to emit sound.
The speaker box according to claim 8, wherein the casing comprises a lower cover plate having the cavity and an upper cover plate covering the lower cover plate, the bottom wall of the lower cover plate facing The upper cover plate extends to form a partition wall, the partition wall is provided with a through hole, and the cavity is divided by the partition wall into a receiving cavity for accommodating the sounding unit and a cavity connected to the sounding unit through the through hole. The rear acoustic cavity communicated with the pressure relief holes of the sounding unit.
The speaker box according to claim 9, wherein the first vibration system, the partition wall and the upper cover plate form a first front acoustic cavity, and the second vibration system, the partition wall and the upper cover plate form a first front acoustic cavity. The lower cover plate forms a second front sound cavity, and the lower cover plate is provided with the sound outlet holes respectively communicating with the first front sound cavity and the second front sound cavity.