WO2022062047A1

WO2022062047A1 - Sound production unit and loudspeaker

Info

Publication number: WO2022062047A1
Application number: PCT/CN2020/124234
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: 2020-10-28
Publication date: 2022-03-31
Also published as: CN213126465U

Abstract

The present application provides a sound production unit and a loudspeaker. The loudspeaker comprises a housing having an accommodation space and the sound production unit accommodated and fixed in the housing; the sound production unit comprises a first vibration system, a second vibration system arranged opposite to the first vibration system, and a magnetic circuit system sandwiched between the first vibration system and the second vibration system and used for driving the first vibration system and the second vibration system; the magnetic circuit system comprises a first magnetic circuit assembly, a second magnetic circuit assembly arranged opposite to the first magnetic circuit assembly, and a magnetic yoke sandwiched between the first magnetic circuit assembly and the second magnetic circuit assembly; the first vibration system is fixed on the first magnetic circuit assembly, and the second vibration system is fixed on the second magnetic circuit assembly. Compared with the mode in the related art of placing two loudspeakers in a superimposed manner, the loudspeaker in the present embodiment not only reduces the space occupied by a housing, but also reduces the space occupied by a magnetic yoke, so that the volume of the loudspeaker in the present embodiment is smaller, and the acoustic performance is better.

Description

Sound unit and speaker

technical field

The present application relates to the field of electro-acoustics, and in particular, to a sound-generating unit and a loudspeaker.

Background technique

In today's mobile Internet era, the number of intelligent mobile terminal devices is constantly increasing, and the requirements for mobile terminals are getting higher and higher, one of which is the requirement for high-quality sound quality functions.

technical problem

Most of the speakers in the related art have only one diaphragm. In order to improve the acoustic performance of the speakers, two speakers are usually placed in an overlapping manner in the related art. The thickness of the terminal is too large, and it cannot comply with the development trend of thinner and thinner terminals.

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

technical solutions

The purpose of the present application is to provide a sound-generating unit and a loudspeaker, the sound-generating unit having better acoustic performance and smaller volume.

The technical solution of the present application is as follows: a sound-generating unit is provided, the sound-generating unit includes a first vibration system, a second vibration system arranged opposite to the first vibration system, and a second vibration system sandwiched between the first vibration system and the first vibration system. a magnetic circuit system between the second vibration systems and used to drive the first vibration system and the second vibration system;

The magnetic circuit system includes a first magnetic circuit assembly, a second magnetic circuit assembly disposed opposite to the first magnetic circuit assembly, and a magnetic circuit assembly sandwiched between the first magnetic circuit assembly and the second magnetic circuit assembly a magnetic yoke, the first magnetic circuit assembly and the second magnetic circuit assembly share the magnetic yoke, the first magnetic circuit assembly is used for driving the first vibration system, and the second magnetic circuit assembly is used for The second vibration system is driven, the first vibration system is fixed on the first magnetic circuit assembly, and the second vibration system is fixed on the second magnetic circuit assembly.

As an embodiment of the present application, the first magnetic circuit assembly includes a first main magnetic steel disposed in the center of one side of the magnetic yoke, disposed on one side of the magnetic yoke and surrounding the first main magnetic steel The magnetic steel is arranged to form a first secondary magnetic steel of a first magnetic gap, a first main pole core attached to the first main magnetic steel, and a first main pole core surrounding the first main pole core and attached to the first main pole core. The first secondary pole core on the secondary magnet;

The second magnetic circuit assembly includes a second main magnetic steel disposed at the center of the other side of the yoke, disposed on the other side of the magnetic yoke and disposed around the second main magnetic steel to form a second main magnetic steel. The second secondary magnetic steel of the two magnetic gaps, the second main pole core attached above the second main magnetic steel, and the second main pole core surrounding the second main pole core and attached to the second secondary magnetic steel Secondary pole core.

As an embodiment of the present application, the first auxiliary pole core includes a first pole core portion surrounding the first main pole core and attached to the first auxiliary magnetic steel, extending from the first pole core A first support portion formed by extending from the outer periphery of the first pole core portion toward the direction away from the magnetic yoke, and a plurality of first supporting portions extending from the outer periphery of the first pole core portion toward the magnetic yoke, the first vibration the system is fixed on the first bracket part;

The second secondary pole core includes a second pole core part surrounding the second main pole core and attached to the second secondary magnetic steel, and facing away from the outer periphery of the second pole core part a second support part extending in the direction of the magnetic yoke and a plurality of second support parts extending from the outer periphery of the second pole core part toward the magnetic yoke, the second vibration system is fixed on the second support On the part, the second support part abuts on the first support part.

As an embodiment of the present application, the first vibration system includes a first diaphragm for vibrating and producing sound and a first voice coil for driving the first diaphragm to vibrate and produce sound, and the first voice coil is suspended on the In the first magnetic gap, the first diaphragm is fixed on the first bracket part;

The second vibration system includes a second diaphragm for vibrating and producing sound and a second voice coil for driving the second diaphragm to vibrate and produce sound, the second voice coil is suspended in the second magnetic gap, so The second diaphragm is fixed on the second bracket part.

As an embodiment of the present application, the first diaphragm includes a first ring portion, a first fixing portion extending from the outer periphery of the first ring portion, and extending from the inner periphery of the first ring portion. the top of the first ball, the first fixed part is fixed on the first bracket part, the top of the first ball abuts on the first voice coil;

The second diaphragm includes a second ring portion, a second fixing portion extending from the outer periphery of the second ring portion, and a second spherical top portion extending from the inner periphery of the second ring portion. The second fixing part is fixed on the second bracket part, and the second ball top abuts on the second voice coil.

As an embodiment of the present application, the first magnetic circuit assembly and the second magnetic circuit assembly are symmetrically arranged with respect to the magnetic yoke, and the first vibration system and the second vibration system are symmetrical with respect to the magnetic yoke set up.

Another technical solution of the present application is as follows: a loudspeaker is provided, which includes a housing having an accommodation space and the sound-emitting unit described in any of the above embodiments accommodated and fixed in the accommodation space.

As an embodiment of the present application, the housing includes a bottom wall and a top cover that are opposite and spaced apart, and a side wall that is bent and extended from the bottom wall to the top cover, and the top cover is provided at the one end of the side wall facing the top cover, the bottom wall, the side wall and the top cover are enclosed to form the receiving space;

The side of the bottom wall close to the top cover is protruded toward the top cover with a blocking wall arranged at intervals from the side wall, and the blocking wall is enclosed to form an accommodation cavity for accommodating the sounding unit, The sound generating unit abuts on the inner wall of the retaining wall.

As an embodiment of the present application, the housing further includes a bottom cover opposite to the top cover and arranged at intervals, and the bottom wall is opened at a position corresponding to the sound-generating unit to communicate with the accommodating cavity the opening, the bottom cover is arranged on the end of the retaining wall facing the bottom wall and covers the opening;

The first vibration system is opposite to the top cover and is arranged at intervals to form a first front acoustic cavity, and the second vibration system is opposite to the bottom cover and arranged at an interval to form a second front acoustic cavity.

As an embodiment of the present application, the speaker further includes a first sound outlet channel penetrating the side wall and communicating with the first front sound cavity, and a first sound outlet passing through the side wall and communicating with the second front sound cavity There are two sound outlet channels, the first sound outlet channel and the second sound outlet channel are located on the same side of the side wall.

beneficial effect

The beneficial effect of the present application is that: the sound generating unit includes a first vibration system, a second vibration system and a magnetic circuit system, so that the speaker in this embodiment has two vibration systems, so that the acoustic performance can be improved. The first magnetic circuit assembly and the second magnetic circuit assembly are respectively fixed on both sides of the yoke, so that the first magnetic circuit assembly and the second magnetic circuit assembly share one magnetic yoke. The loudspeaker in this embodiment reduces the space occupied by one magnetic yoke, so that the volume of the loudspeaker in this embodiment is smaller and the acoustic performance is better.

Description of drawings

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

Fig. 2 is the overall structure schematic diagram of the sounding monomer in Fig. 1;

Fig. 3 is the exploded schematic diagram of the sounding monomer in Fig. 2;

Fig. 4 is the sectional view along A-A of Fig. 1;

FIG. 5 is an exploded schematic view of the housing in FIG. 1;

FIG. 6 is a schematic diagram of part of the structure in FIG. 5 .

Embodiments of the present invention

To further illustrate the various embodiments, the present application provides accompanying drawings. These drawings are part of the disclosure content of the present application, and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant description of the specification to explain the operation principles of the embodiments. With reference to these contents, one of ordinary skill in the art will understand other possible implementations and advantages of the present application. Components in the figures are not drawn to scale, and similar component symbols are often used to represent similar components.

The present application will be further described below with reference to the accompanying drawings and embodiments.

Referring to FIGS. 1-6 , an embodiment of the present application provides a loudspeaker 1 . The loudspeaker 1 in this embodiment includes a housing 10 having an accommodation space 11 and a sounding unit 20 accommodated and fixed in the accommodation space 11 .

Please refer to FIG. 2 and FIG. 3 , the sound generating unit 20 in this embodiment includes a first vibration system 21 , a second vibration system 22 disposed opposite to the first vibration system 21 , and a second vibration system 22 sandwiched between the first vibration system 21 and the second vibration system 21 . The magnetic circuit system 23 between the vibration systems 22 and used to drive the first vibration system 21 and the second vibration system 22 .

2 and 3, the magnetic circuit system 23 in this embodiment includes a first magnetic circuit assembly 230, a second magnetic circuit assembly 240 disposed opposite to the first magnetic circuit assembly 230, and a second magnetic circuit assembly 240 sandwiched between the first magnetic circuit assembly 230 and the second magnetic circuit assembly 240 between the yoke 250, the first magnetic circuit assembly 230 and the second magnetic circuit assembly 240 share the magnetic yoke 250, the first magnetic circuit assembly 230 is used to drive the first vibration system 21, the second The magnetic circuit assembly 240 is used to drive the second vibration system 22 , the first vibration system 21 is fixed on the first magnetic circuit assembly 230 , and the second vibration system 22 is fixed on the second magnetic circuit assembly 240 .

Please refer to FIG. 2 , FIG. 3 and FIG. 5 , preferably, the first magnetic circuit assembly 230 and the second magnetic circuit assembly 240 are symmetrically arranged with respect to the yoke 250 , and the first vibration system 21 and the second vibration system 22 are symmetrical about the magnetic yoke 250 set up.

In this embodiment, by accommodating the first vibration system 21 , the second vibration system 22 and the magnetic circuit system 23 in the housing 10 , the speaker 1 in this embodiment has two vibration systems, so that the acoustic performance can be improved, In addition, by fixing the first magnetic circuit assembly 230 and the second magnetic circuit assembly 240 on both sides of one magnetic yoke 250, the speaker 1 in this embodiment is compared to the method of placing the two speakers 1 on top of each other in the related art. Not only the space occupied by a housing 10 is reduced, but also the space occupied by a magnetic yoke 250 is reduced, so that the volume of the speaker 1 in this embodiment is smaller and the acoustic performance is better.

Referring to FIGS. 2-4 , in one embodiment, the first magnetic circuit assembly 230 includes a first main magnet 231 disposed at the center of one side of the yoke 250 , disposed on one side of the yoke 250 and surrounding the first main magnet 231 . A main magnetic steel 231 is disposed to form the first auxiliary magnetic steel 233 of the first magnetic gap 232 , the first main pole core 234 attached above the first main magnetic steel 231 , and the first main pole core 234 surrounding and attached to the first main pole core 234 . The first secondary pole core 235 on the first secondary magnetic steel 233 .

Referring to FIG. 3 , in one embodiment, the first secondary pole core 235 includes a first pole core portion 2351 surrounding the first main pole core 234 and attached to the first secondary magnetic steel 233 . A first support portion 2352 extending from the outer periphery of the first pole core portion 2351 toward the direction away from the magnetic yoke 250 and a plurality of first supporting portions 2353 extending from the outer periphery of the first pole core portion 2351 toward the magnetic yoke 250, the first vibration system 21 is fixed on the first bracket portion 2352 . In this embodiment, the first secondary pole core 235 is designed according to the above-mentioned structure, the first pole core portion 2351 is arranged corresponding to the first main pole core 234, and the first support portion 2352 supports the first vibration system 21, so that this The structure of the sound generating unit 20 in the embodiment is simpler.

Referring to FIG. 3 , preferably, the first bracket portion 2352 is annular.

Referring to FIG. 3 , in an embodiment, the first vibration system 21 includes a first diaphragm 211 for vibrating and producing sound and a first voice coil 212 for driving the first diaphragm 211 to vibrate and produce sound. The first voice coil 212 is suspended Within the first magnetic gap 232 , the first diaphragm 211 is fixed on the first bracket portion 2352 .

Specifically, after the first diaphragm 211 is fixed on the first bracket portion 2352 , the first diaphragm 211 , the first bracket portion 2352 , and the magnetic yoke 250 are enclosed to form the first rear acoustic cavity 213 .

Specifically, the first diaphragm 211 includes a first ring portion 2111 , a first fixing portion 2112 extending from the outer periphery of the first ring portion 2111 , and a first ball top portion extending from the inner periphery of the first ring portion 2111 2113 , the first fixing portion 2112 is fixed on the first bracket portion 2352 , and the first ball top portion 2113 abuts on the first voice coil 212 .

Referring to FIG. 3 and FIG. 4 , in one embodiment, the second magnetic circuit assembly 240 includes a second main magnet 241 disposed at the center of the other side of the yoke 250 , disposed on the other side of the yoke 250 and The second auxiliary magnet 243 disposed around the second main magnet 241 to form the second magnetic gap 242, the second main pole core 244 attached above the second main magnet 241, and the second main pole core 244 surrounded and attached The second secondary pole core 245 attached to the second secondary magnet steel 243 .

Referring to FIGS. 3 and 4 , in one embodiment, the second secondary pole core 245 includes a second pole core portion 2451 surrounding the second main pole core 244 and attached to the second secondary magnetic steel 243 . A second support portion 2452 formed by extending the outer periphery of the pole core portion 2451 toward the second vibration system 22 and a plurality of second supporting portions 2453 extending from the outer periphery of the second pole core portion 2451 toward the yoke 250, the second vibration system 22 is fixed on the second bracket portion 2452 , and the second support portion 2453 abuts on the first support portion 2353 . In this embodiment, the second secondary pole core 245 is designed according to the above structure, the second pole core portion 2451 is arranged corresponding to the second main pole core 244, and the second support portion 2452 supports the second vibration system 22, so that this The structure of the sound generating unit 20 in the embodiment is simpler.

Preferably, the second bracket portion 2452 is annular.

Specifically, the first secondary pole core 235 and the second secondary pole core 245 are symmetrically arranged with respect to the magnetic yoke 250 .

It should be noted that, in the above embodiment, one side of the magnetic yoke 250 and the other side of the magnetic yoke 250 are opposite sides of the magnetic yoke 250 .

Referring to FIG. 3 , in one embodiment, the second vibration system 22 includes a second diaphragm 221 for vibrating and producing sound, and a second voice coil 222 for driving the second diaphragm 221 to vibrate and produce sound. The second voice coil 222 is suspended Within the second magnetic gap 242 , the second diaphragm 221 is fixed on the second bracket portion 2452 .

Specifically, after the second diaphragm 221 is fixed on the second bracket portion 2452 , the second diaphragm 221 , the second bracket portion 2452 , and the magnetic yoke 250 are enclosed to form the second rear acoustic cavity 223 .

Referring to FIG. 3 , in one embodiment, the second diaphragm 221 includes a second folded ring portion 2211 , a second fixed portion 2212 extending from the outer periphery of the second folded ring portion 2211 , and an inner portion from the second folded ring portion 2211 . The second spherical top portion 2213 is formed by extending the peripheral edge. The second fixing portion 2212 is fixed on the second bracket portion 2452 , and the second spherical top portion 2213 abuts on the second voice coil 222 .

Referring to FIGS. 4-6 , in one embodiment, the housing 10 includes a bottom wall 12 and a top cover 13 that are opposite and spaced apart, and a side wall 14 that is bent and extended from the bottom wall 12 toward the top cover 13 . The cover 13 is arranged on one end of the side wall 14 facing the top cover 13 , and the bottom wall 12 , the side wall 14 and the top cover 13 are enclosed to form a receiving space 11 .

Please refer to FIG. 4 and FIG. 6 , preferably, the side of the bottom wall 12 close to the top cover 13 is protruded with a blocking wall 15 toward the top cover 13 . In the accommodating cavity 151 , the sounding unit 20 abuts on the inner wall of the retaining wall 15 . Specifically, the periphery of the magnetic yoke 250 , the periphery of the first secondary magnetic steel 233 , the periphery of the second secondary magnetic steel 243 , the periphery of the first secondary pole core 235 , and the periphery of the second secondary pole core 245 abut against the retaining wall 15 on the inner wall.

Referring to FIG. 6 , preferably, the retaining wall 15 and the side wall 14 are spaced apart and form an annular cavity 152 that communicates with the first rear acoustic cavity 213 and the second rear acoustic cavity 223 respectively.

Referring to FIGS. 5 and 6 , in one embodiment, the casing 10 further includes a bottom cover 16 opposite to the top cover 13 and arranged at intervals, and the bottom wall 12 defines a receiving cavity at a position corresponding to the sounding unit 20 . 151 is connected to the opening 121, the bottom cover 16 is covered on the end of the retaining wall 15 facing the bottom wall 12 and covers the opening 121, the first vibration system 21 is opposite to the top cover 13 and is spaced apart to form a first front acoustic cavity 2114, The two vibration systems 22 are opposite to and spaced apart from the bottom cover 16 to form a second front acoustic cavity 2214 . Specifically, the first diaphragm 211 is opposite to the top cover 13 and spaced apart to form a first front acoustic cavity 2114 , and the second diaphragm 221 is opposite to the bottom cover 16 and spaced to form a second front acoustic cavity 2214 .

1 and FIG. 6 , in one embodiment, the speaker 1 further includes a first sound outlet channel 141 penetrating the side wall 14 and communicating with the first front sound cavity 2114 , and a first sound outlet channel 141 penetrating the side wall 14 and communicating with the second front sound cavity 2214 The second sound outlet channel 142 , preferably the first sound outlet channel 141 and the second sound outlet channel 142 are located on the same side of the side wall 14 .

In this embodiment, by accommodating the first vibration system 21 , the second vibration system 22 and the magnetic circuit assembly in the housing 10 , the sound emitted by the first vibration system 21 and the sound emitted by the second vibration system 22 are The sound output channel 141 and the second sound output channel 142 emit sound, which improves the acoustic performance of the speaker 1 in this embodiment.

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 inventive concept of the present application, but these belong to the present application. scope of protection.

Claims

A sound-generating unit is characterized in that: the sound-generating unit includes a first vibration system, a second vibration system arranged opposite to the first vibration system, and a second vibration system sandwiched between the first vibration system and the second vibration system. a magnetic circuit system between the vibration systems and used to drive the first vibration system and the second vibration system;

The magnetic circuit system includes a first magnetic circuit assembly, a second magnetic circuit assembly disposed opposite to the first magnetic circuit assembly, and a magnetic circuit assembly sandwiched between the first magnetic circuit assembly and the second magnetic circuit assembly a magnetic yoke, the first magnetic circuit assembly and the second magnetic circuit assembly share the magnetic yoke, the first magnetic circuit assembly is used for driving the first vibration system, and the second magnetic circuit assembly is used for The second vibration system is driven, the first vibration system is fixed on the first magnetic circuit assembly, and the second vibration system is fixed on the second magnetic circuit assembly.
The sound-generating unit according to claim 1, wherein the first magnetic circuit assembly comprises a first main magnetic steel disposed in the center of one side of the magnetic yoke, and disposed on one side of the magnetic yoke and surrounding the first main magnetic steel to form a first secondary magnetic steel, a first main pole core attached above the first main magnetic steel, and a first auxiliary magnetic steel surrounding the first main pole core and a first secondary pole core attached to the first secondary magnetic steel;

The second magnetic circuit assembly includes a second main magnetic steel disposed at the center of the other side of the yoke, disposed on the other side of the magnetic yoke and disposed around the second main magnetic steel to form a second main magnetic steel. The second secondary magnetic steel of the two magnetic gaps, the second main pole core attached above the second main magnetic steel, and the second main pole core surrounding the second main pole core and attached to the second secondary magnetic steel Secondary pole core.
The sound-generating unit according to claim 2, wherein the first secondary pole core comprises a first pole core portion surrounding the first main pole core and attached to the first secondary magnetic steel, A first bracket portion extending from the outer peripheral edge of the first pole core portion toward the direction away from the yoke and a plurality of first supports extending from the outer peripheral edge of the first pole core portion toward the magnetic yoke part, the first vibration system is fixed on the first bracket part;

The second secondary pole core includes a second pole core part surrounding the second main pole core and attached to the second secondary magnetic steel, and facing away from the outer periphery of the second pole core part a second support part extending in the direction of the magnetic yoke and a plurality of second support parts extending from the outer periphery of the second pole core part toward the magnetic yoke, the second vibration system is fixed on the second support On the part, the second support part abuts on the first support part.
The sound-generating unit according to claim 3, wherein the first vibration system comprises a first vibrating membrane for vibrating and producing sound and a first voice coil for driving the first vibrating membrane to vibrate and produce sound, and the first vibrating membrane A voice coil is suspended in the first magnetic gap, and the first diaphragm is fixed on the first bracket part;

The second vibration system includes a second diaphragm for vibrating and producing sound and a second voice coil for driving the second diaphragm to vibrate and produce sound, the second voice coil is suspended in the second magnetic gap, so The second diaphragm is fixed on the second bracket part.
The sound-generating unit according to claim 4, wherein the first diaphragm comprises a first folded ring portion, a first fixed portion extending from the outer periphery of the first folded ring portion, and a first fixed portion extending from the outer periphery of the first folded ring portion. A first spherical top extending from the inner peripheral edge of the folded ring portion, the first fixing portion is fixed on the first bracket portion, and the first spherical top abuts on the first voice coil;

The second diaphragm includes a second ring portion, a second fixing portion extending from the outer periphery of the second ring portion, and a second spherical top portion extending from the inner periphery of the second ring portion. The second fixing part is fixed on the second bracket part, and the second ball top abuts on the second voice coil.
The sound-generating unit according to any one of claims 1-5, wherein the first magnetic circuit assembly and the second magnetic circuit assembly are symmetrically arranged with respect to the magnetic yoke, and the first vibration system and the second vibration system is symmetrically arranged with respect to the yoke.
A loudspeaker is characterized in that: it comprises a casing having a receiving space and the sound-emitting unit according to any one of the preceding claims 1-5, which is received and fixed in the receiving space.
The loudspeaker according to claim 7, wherein the casing comprises a bottom wall and a top cover that are opposite and spaced apart, and a side wall bent and extended from the bottom wall toward the top cover, the top cover The cover is arranged on one end of the side wall facing the top cover, and the bottom wall, the side wall and the top cover are enclosed to form the receiving space;

The side of the bottom wall close to the top cover is protruded toward the top cover with a blocking wall arranged at intervals from the side wall, and the blocking wall is enclosed to form an accommodation cavity for accommodating the sounding unit, The sound generating unit abuts on the inner wall of the retaining wall.
The loudspeaker according to claim 8, wherein the casing further comprises a bottom cover opposite to the top cover and arranged at intervals, and the bottom wall is provided with a position corresponding to the sounding unit. an opening communicating with the accommodating cavity, and the bottom cover is provided on the end of the retaining wall facing the bottom wall and covers the opening;

The first vibration system is opposite to the top cover and is arranged at intervals to form a first front acoustic cavity, and the second vibration system is opposite to the bottom cover and arranged at an interval to form a second front acoustic cavity.
The loudspeaker according to claim 9, wherein the loudspeaker further comprises a first sound outlet channel passing through the side wall and communicating with the first front acoustic cavity, and a first sound outlet channel passing through the side wall and communicating with the second sound cavity. The front sound cavity communicates with a second sound outlet channel, and the first sound outlet channel and the second sound outlet channel are located on the same side of the side wall.