CN108696806B

CN108696806B - Speaker and portable terminal

Info

Publication number: CN108696806B
Application number: CN201810667414.8A
Authority: CN
Inventors: 王兴龙; 刘岩涛; 葛连山; 刘春发
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2018-06-25
Filing date: 2018-06-25
Publication date: 2023-11-21
Anticipated expiration: 2038-06-25
Also published as: WO2020001230A1; CN108696806A

Abstract

The invention discloses a loudspeaker and a portable terminal, wherein the loudspeaker comprises a first vibration system, a second vibration system, a magnetic circuit system and a connecting piece, wherein the first vibration system comprises a first vibrating diaphragm and a voice coil arranged on the inner side of the first vibrating diaphragm; the second vibration system comprises a second vibrating diaphragm which is arranged opposite to the first vibrating diaphragm; the magnetic circuit system is arranged between the first vibrating diaphragm and the second vibrating diaphragm, a first sound cavity is formed between the magnetic circuit system and the first vibrating diaphragm, and the voice coil is accommodated in a magnetic gap of the magnetic circuit system; a second sound cavity is formed between the magnetic circuit system and the second vibrating diaphragm, and a through hole is arranged between the first sound cavity and the second sound cavity; the connecting piece is located in the through-hole, and the upper end and the first vibrating diaphragm fixed connection of connecting piece, lower extreme and second vibrating diaphragm fixed connection. The structure of the loudspeaker of the invention for realizing bidirectional sound production occupies small volume, and is convenient for being widely applied to portable terminals.

Description

Speaker and portable terminal

Technical Field

The present invention relates to electroacoustic technology, and more particularly, to a speaker and a portable terminal.

Background

At present, speakers have been widely used as an important component of terminals having an audio playing function. Some terminals, especially portable terminals, such as mobile phones, tablet computers, and headphones, can provide very limited installation space for the speaker, so that the existing speaker that can be applied to a small installation space generally adopts a structure that a single vibrating diaphragm sounds on the front surface. In order to realize bidirectional sound production, the prior art provides a loudspeaker adopting a combined structure of two sets of voice coils and a vibrating diaphragm and a magnetic circuit system, wherein the magnetic circuit system is provided with double magnetic gaps and is respectively used for accommodating the two voice coils, but the loudspeaker is usually large in size and difficult to be widely applied. In addition, in the structure in the prior art, the combined structure of one set of voice coil and the vibrating diaphragm and the combined structure of the other set of voice coil and the vibrating diaphragm work independently, one set of voice coil and the vibrating diaphragm is used as a high-frequency sound generator, the other set of voice coil and the vibrating diaphragm are used as a low-frequency sound generator, and simultaneous bidirectional sound production cannot be realized.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker, and aims to solve the technical problem that the existing loudspeaker for realizing bidirectional sound production is difficult to widely apply due to large volume.

In order to achieve the above object, the present invention provides a speaker, which includes a first vibration system, a second vibration system, a magnetic circuit system, and a connecting member,

the first vibration system comprises a first vibrating diaphragm and a voice coil arranged on the inner side of the first vibrating diaphragm; the second vibration system comprises a second vibrating diaphragm which is arranged opposite to the first vibrating diaphragm;

the magnetic circuit system is arranged between the first vibrating diaphragm and the second vibrating diaphragm, a first sound cavity is formed between the magnetic circuit system and the first vibrating diaphragm, and the voice coil is accommodated in a magnetic gap of the magnetic circuit system;

a second sound cavity is formed between the magnetic circuit system and the second vibrating diaphragm, and a through hole is formed between the first sound cavity and the second sound cavity;

the connecting piece is arranged in the through hole, the upper end of the connecting piece is fixedly connected with the first vibrating diaphragm, and the lower end of the connecting piece is fixedly connected with the second vibrating diaphragm.

Preferably, the through hole is arranged on the magnetic circuit system.

Preferably, the connecting piece is hollow tube-shape, and upper and lower open setting, the up end of connecting piece with first vibrating diaphragm fixed connection, lower terminal surface with second vibrating diaphragm fixed connection.

Preferably, the side wall of the connecting piece is in a hollow-out shape, and the middle part of the side wall of the connecting piece is provided with a vent hole or the upper end surface and the lower end surface of the connecting piece are provided with vent notches.

Preferably, the side wall of the connecting member is provided with a recessed or raised reinforcement extending in the circumferential direction of the connecting member.

Preferably, the upper edge of the side wall of the connecting piece is turned inwards to form an upper flanging, and the top surface of the upper flanging is flush with the upper end surface of the connecting piece; the lower edge of the side wall of the connecting piece is turned inwards to form a lower flanging, and the bottom surface of the lower flanging is flush with the lower end surface of the connecting piece.

Preferably, the connecting piece includes upper connecting portion and lower connecting portion that upper and lower relative setting is and connect the supporting part between upper connecting portion and lower connecting portion, upper connecting portion and lower connecting portion all extend and be rectangular form perpendicular to upper and lower direction, upper connecting portion with first vibrating diaphragm fixed connection, lower connecting portion with second vibrating diaphragm fixed connection.

Preferably, the method comprises the steps of,

the supporting parts extend in the up-down direction, and a plurality of supporting parts are arranged at intervals along the length direction of the upper connecting parts or the lower connecting parts; or,

The support part comprises a first section extending downwards from one end of the upper connecting part, a second section extending upwards from the lower end of the first section to the other end of the upper connecting part along the length direction of the upper connecting part, and a third section extending downwards from one end of the second section far away from the first section and connected with the lower connecting part; or,

the support parts are arranged in two and are obliquely crossed relative to the up-down direction.

Preferably, the connecting piece is made of porous materials.

Preferably, the magnetic circuit system comprises a magnetic yoke, and a central magnetic circuit part and a side magnetic circuit part which are arranged on the magnetic yoke;

a magnetic gap for accommodating the voice coil is formed between the center magnetic circuit part and the side magnetic circuit part;

at least one of the center magnetic circuit portion and the side magnetic circuit portion is provided with a permanent magnet;

the through hole comprises a central through hole which is arranged corresponding to the magnetic conducting yoke and the central magnetic circuit part, and the connecting piece is arranged in the central through hole.

Preferably, the central magnetic circuit part comprises a magnetic conduction yoke, a central magnetic steel arranged at the bottom of the magnetic conduction yoke and a magnetic conduction plate arranged at the top of the central magnetic steel;

the magnetic yoke is characterized in that a first inner hole is formed in the magnetic yoke, a second inner hole is formed in the central magnetic steel, a third inner hole is formed in the magnetic yoke, and the first inner hole, the second inner hole and the third inner hole are communicated to form the central through hole.

the through hole includes a side through hole provided outside the central magnetic circuit portion;

the side through holes are arranged on the magnetic yoke;

or the loudspeaker comprises a shell for fixing the magnetic circuit system, and the side through hole is arranged on the shell or between the shell and the side part of the magnetic yoke.

Preferably, the connecting piece is arranged at the side through hole.

Preferably, the side through holes comprise a plurality of connecting protrusions arranged at intervals, the connecting piece comprises a connecting bottom plate and a plurality of connecting protrusions protruding on the connecting bottom plate, the connecting bottom plate is fixedly connected with one of the first vibrating diaphragm and the second vibrating diaphragm, and the end parts of the plurality of connecting protrusions penetrate through the side through holes in a one-to-one correspondence mode and are fixedly connected with the other one of the first vibrating diaphragm and the second vibrating diaphragm.

Preferably, the two ends of the magnetic conductive yoke are flat plates, the side through holes at least comprise two ends arranged at the two ends of the magnetic conductive yoke, the connecting bottom plate is connected with the second vibrating diaphragm, and the connecting convex part is connected with the first vibrating diaphragm.

Preferably, the connection protrusion is provided in a plate shape; the end part of the connecting convex part is provided with a connecting flanging which is bent inwards or outwards or partially inwards and partially outwards; and/or

The connecting convex part is arranged in a plate shape, and the lower end of the side edge of the connecting convex part is inwards bent and extended to form a side reinforcing part connected with the connecting bottom plate; and/or

The lower end of the inner side of the connecting convex part is provided with a reinforcing rib connected with the connecting bottom plate; and/or

The connecting bottom plate is arranged in a hollowed-out shape; and/or

The connecting convex parts are arranged in a plate shape, and the connecting convex parts are arranged in a hollowed-out shape; and/or

The connecting bottom plate is square, round, runway-shaped or oval.

Preferably, the first diaphragm includes a planar sheet-shaped first center portion, a first ring-folded portion disposed around the first center portion, and a first fixing portion disposed around the first ring-folded portion; the connecting convex part is fixed at the first central part, and the first folding ring part is of a structure formed by one bulge, or is of a wave-shaped structure formed by at least one bulge and at least one concave; and/or

The second vibrating diaphragm comprises a planar sheet-shaped second central part, a second ring-folded part arranged around the second central part and a second fixing part arranged around the second ring-folded part; the connecting bottom plate is fixed on the upper side of the second central part, and the second ring-folding part is of a structure formed by one bulge or of a wave-shaped structure formed by at least one bulge and at least one recess.

Preferably, the second diaphragm further includes a composite layer coupled to the central portion, and the lower end of the connecting member is fixedly connected to the composite layer or the central portion.

The invention also provides a portable terminal, which comprises a shell, wherein the shell is internally provided with a containing cavity, the portable terminal further comprises the loudspeaker, the loudspeaker is arranged in the containing cavity, and the shell is provided with a first sound hole corresponding to the first vibrating diaphragm and a second sound hole corresponding to the second vibrating diaphragm.

Preferably, the shell is provided with a front surface and a back surface which are oppositely arranged, the first sound hole is arranged on the front surface of the shell, and the second sound hole is arranged on the back surface of the shell;

the space, away from the second vibrating diaphragm, of the first vibrating diaphragm is communicated with the first sound hole, and the first sound hole is used for conducting sound emitted by the first vibrating diaphragm;

the second vibrating diaphragm is far away from the space of the first vibrating diaphragm and is communicated with the second sound hole, and the second sound hole is used for conducting sound emitted by the second vibrating diaphragm.

The loudspeaker of the invention adopts two sets of vibration systems, but only adopts one set of voice coil and magnetic circuit system to realize the structure of bidirectional sound production, thereby being small in occupied volume, being suitable for narrower installation space and being convenient for being widely applied to portable terminals. When the loudspeaker works, the vibrating diaphragm of the first vibrating system is directly driven by the magnetic circuit system, and as the through hole is formed between the first sound cavity and the second sound cavity and communicated with each other, the connecting piece is arranged in the through hole, and the two ends of the connecting piece are respectively fixedly connected with the first vibrating diaphragm and the second vibrating diaphragm, the vibrating diaphragm of the second vibrating system synchronously vibrates and sounds under the pushing of the connecting piece, namely, the first vibrating diaphragm and the second vibrating diaphragm are in linkage sound production. And, when first vibrating diaphragm and second vibrating diaphragm linkage sound production, because the air in first sound cavity and the second sound cavity is circulated each other through the through-hole, the atmospheric pressure difference between them is less, and the resistance that causes to the vibration of first vibrating diaphragm and second vibrating diaphragm is also less relatively to can realize better acoustic performance. When the loudspeaker is applied to the portable terminal, the loudspeaker can respectively sound in the front and back directions of the portable terminal through the first vibration system and the second vibration system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front view of a speaker according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the back structure of the speaker of fig. 1;

FIG. 3 is a schematic cross-sectional view of the speaker of FIG. 1, illustrating a first embodiment of a connecting member and a second diaphragm;

fig. 4 is a partial enlarged view at a in fig. 3.

FIG. 5 is an enlarged schematic view of the right end of the structure of FIG. 3;

FIG. 6 is an enlarged schematic view of the right end of the structure of FIG. 3, wherein the first embodiment of the diaphragm is replaced with a second embodiment of the second diaphragm;

fig. 7 is a schematic cross-sectional view of the speaker of fig. 1, in which a first embodiment of a connector is illustrated, and a first embodiment of a second diaphragm is replaced with a third embodiment of the second diaphragm;

FIG. 8 is a partial enlarged view at B in FIG. 7;

fig. 9 is a schematic cross-sectional view of the speaker of fig. 1, wherein the first embodiment of the connector is replaced with the second embodiment of the connector;

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

fig. 11 is a schematic cross-sectional structure of the speaker of fig. 1, in which the first embodiment of the connector is replaced with the third embodiment of the connector;

FIG. 12 is an enlarged view of a portion of FIG. 11 at D;

fig. 13 is a schematic view of a portion of the structure of the speaker of fig. 1;

fig. 14 is an exploded view of the speaker of fig. 1, illustrating a first embodiment of the magnetic circuit and the connector;

fig. 15 is a schematic structural view of a fourth embodiment of a speaker connector according to the present invention;

fig. 16 is a schematic view showing the structure of a fifth embodiment of the connection member of the speaker of the present invention;

fig. 17 is a schematic structural view of a sixth embodiment of a speaker connector according to the present invention;

fig. 18 is a schematic structural view of a seventh embodiment of a speaker connector according to the present invention;

fig. 19 is a schematic view showing the structure of an eighth embodiment of the connection member of the speaker of the present invention;

fig. 20 is a schematic structural view of a ninth embodiment of a connection member of a speaker of the present invention;

fig. 21 is a schematic structural view of a second embodiment of a magnetic circuit system of a speaker according to the present invention;

Fig. 22 is a schematic structural view of a third embodiment of a magnetic circuit system of a speaker according to the present invention;

fig. 23 is a schematic structural view of a fourth embodiment of a magnetic circuit system of a speaker according to the present invention;

fig. 24 is a schematic cross-sectional structure of the speaker of fig. 1, in which a tenth embodiment of the connection member is illustrated;

fig. 25 is a schematic view showing the structure of a tenth embodiment of the connection member of the speaker shown in fig. 24;

fig. 26 is a schematic view showing the structure of an eleventh embodiment of a connector in the speaker shown in fig. 24;

fig. 27 is a schematic view showing the structure of a twelfth embodiment of a connector in the speaker shown in fig. 24;

fig. 28 is a schematic front view of a portable terminal according to an embodiment of the present invention;

fig. 29 is a rear structure diagram of the portable terminal of fig. 28;

fig. 30 is a schematic view of a partial cross-sectional structure at E in fig. 28.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a loudspeaker.

In the embodiment of the present invention, as shown in fig. 1 to 3, and fig. 13 and 14, the speaker 210 includes a first vibration system 1, a second vibration system 2, magnetic circuit systems (3 a,3b,3c,3 d), and connection members (40-48), wherein,

the first vibration system 1 comprises a first vibrating diaphragm 11 and a voice coil 12 arranged on the inner side of the first vibrating diaphragm 11; the second vibration system 2 includes a second diaphragm (21 a,21b,21 c) disposed opposite to the first diaphragm 11;

a magnetic circuit system (3 a,3b,3c,3 d) disposed between the first diaphragm 11 and the second diaphragm (21 a,21b,21 c), a first acoustic chamber 5 being formed between the magnetic circuit system (3 a,3b,3c,3 d) and the first diaphragm 11, and a voice coil 12 being accommodated in a magnetic gap 31 of the magnetic circuit system (3 a,3b,3c,3 d);

a second sound cavity 6 is formed between the magnetic circuit systems (3 a,3b,3c,3 d) and the second vibrating diaphragm (21 a,21b,21 c), and a through hole 32 is arranged between the first sound cavity 5 and the second sound cavity 6;

the connecting pieces (40-48) are arranged in the through holes 32, the upper ends of the connecting pieces (40-48) are fixedly connected with the first vibrating diaphragm 11, and the lower ends of the connecting pieces are fixedly connected with the second vibrating diaphragms (21 a,21b,21 c).

In the present embodiment, for simplicity of description, the position of the speaker 210 when the first diaphragm 11 is placed upward is defined as up and down with reference to the reference, that is, the side of the first diaphragm 11 facing away from the magnetic circuit system (3 a,3b,3c,3 d) is up, and the side of the first diaphragm 11 facing toward the magnetic circuit system (3 a,3b,3c,3 d) is down.

The first vibration system 1 may refer to the existing form, specifically, the voice coil 12 is fixedly connected with the first diaphragm 11 and extends into the magnetic gap 31, the current that the voice coil 12 is connected with and changes is vibrated by ampere force with different magnitudes, the voice coil 12 vibrates to drive the first diaphragm 11 to vibrate, and the energy conversion mode is electric energy-mechanical energy-acoustic energy. To adjust the frequency characteristics of the vibrations, the first vibration system 1 may further comprise a balancing weight.

The form of the magnetic circuit system may also refer to the existing structure, for example, the magnetic gap 31 may be formed between the center magnetic steel and the side magnetic steel, or may be formed between the center magnetic steel and the side wall of the magnetic yoke 34. The top view shape of the center magnetic steel can be round, round rectangle or the like.

The through holes 32 may be formed on the magnetic circuit systems (3 a,3b,3c,3 d) or on the housing 7, so long as the connecting pieces (40-48) can move in the through holes 32 conveniently, the linkage of the first diaphragm 11 and the second diaphragms (21 a,21b,21 c) is realized, and the air flow channels 33 for communicating the first acoustic cavity 5 and the second acoustic cavity 6 are formed between the connecting pieces (40-48) and the inner wall surfaces of the through holes 32.

The connection between the connecting piece (40-48) and the first diaphragm 11 or the second diaphragm (21 a,21b,21 c) may be a glue bond or an injection-molded connection. In embodiments in which the first diaphragm 11 and the second diaphragms (21 a,21b,21 c) are provided with a compound portion, i.e. a dome, the connecting members (40-48) may be connected to the compound portion. The shape of the composite part can be a flat plate shape, an embossing device, a dome shape, or the like. In order to reduce the weight of the component while ensuring the strength, the material of the connecting member (40-48) includes, but is not limited to, paper, kapton (polyimide (PI) film material), foaming material, carbon fiber material, metal material such as aluminum foil/magnesium aluminum alloy/magnesium lithium alloy, plastic material such as PEN (polyethylene naphthalate)/PI (polyimide)/LCP (Liquid Crystal Polymer liquid crystal polymer)/PC (polycarbonate)/PPA (Polyphthalamide) or porous material. The manner in which the connectors (40-48) are manufactured includes, but is not limited to: winding, blow molding, injection molding, stamping, machining and 3D printing.

In order to facilitate the installation of the first vibration system 1, the second vibration system 2 and the magnetic circuit system (3 a,3b,3c,3 d) therebetween, the speaker 210 further includes a housing 7, a front cover 8 and a rear cover 9, and the housing 7 is used for accommodating the first vibration system 1, the second vibration system 2 and the magnetic circuit system (3 a,3b,3c,3 d). The front cover 8 and the rear cover 9 cooperate with the housing 7 to form a protective frame, specifically, the edge portion for fixing of the first diaphragm 11 is held by the front cover 8 and the housing 7, and the edge portion for fixing of the second diaphragms (21 a,21b,21 c) is held by the rear cover 9 and the housing 7. The front cover 8 is arranged corresponding to the first vibration system 1 and is provided with a front sound outlet 71 for sound emission, and the rear cover 9 is arranged corresponding to the second vibration system 2 and is provided with a rear sound outlet 72 for sound emission.

The speaker 210 of the present invention has a small volume occupied by a structure in which two sets of vibration systems are provided, but only one set of voice coil 12 and magnetic circuit systems (3 a,3b,3c,3 d) are used to realize bidirectional sound production, and is adaptable to a relatively narrow installation space, thereby being convenient for wide application in the portable terminal 100. When the loudspeaker 210 works, the magnetic circuit systems (3 a,3b,3c and 3 d) directly drive the diaphragms of the first vibration system 1, and as the through holes 32 are arranged between the first sound cavity 5 and the second sound cavity 6 and communicated, the connecting pieces (40-48) are arranged in the through holes 32, and the two ends of the connecting pieces are fixedly connected with the first diaphragm 11 and the second diaphragms (21 a,21b and 21 c) respectively, the diaphragms of the second vibration system 2 synchronously vibrate and sound under the pushing or pulling of the connecting pieces (40-48), namely, the first diaphragm 11 and the second diaphragms (21 a,21b and 21 c) are linked and sound. In addition, when the first diaphragm 11 and the second diaphragms (21 a,21b and 21 c) are linked to produce sound, air in the first sound cavity 5 and air in the second sound cavity 6 can circulate through the through holes, the air pressure difference between the first sound cavity 5 and the second sound cavity 6 is small, and resistance caused by vibration of the first diaphragm 11 and the second diaphragms (21 a,21b and 21 c) is relatively small, so that better acoustic performance can be realized. When applied to the mobile terminal 100, the speaker 210 of the present invention can sound in both the forward and reverse directions of the mobile terminal 100 by the first vibration system 1 and the second vibration system 2.

Further, through holes 32 are provided in the magnetic circuit systems (3 a,3b,3c,3 d).

In this embodiment, the through hole 32 may be formed only on the bottom wall of the magnetic yoke 34 to correspondingly connect the magnetic gap 31 with the second sound cavity 6, or directly penetrate through the magnetic plate, the center magnetic steel and the magnetic yoke 34, or directly penetrate through the magnetic plate, the side magnetic steel and the magnetic yoke 34. The connecting pieces (40-48) can move in the through holes 32 conveniently, so that the linkage of the first vibrating diaphragm 11 and the second vibrating diaphragms (21 a,21b and 21 c) is realized, and an air flow channel 33 for communicating the first sound cavity 5 and the second sound cavity 6 is formed between the connecting pieces (40-48) and the inner wall surface of the through holes 32.

Further, referring to fig. 3, 4, 7 to 12, and 14 to 17, in the first to sixth embodiments of the connecting member, the connecting member (40-45) is hollow and cylindrical, and is disposed with an upper opening and a lower opening, the upper end surface of the connecting member (40-45) is fixedly connected with the first diaphragm 11, and the lower end surface is fixedly connected with the second diaphragms (21 a,21b,21 c). In this embodiment, the structural strength of the transmission is ensured by arranging the connecting members (40-45) in a cylindrical structure, and the energy loss is reduced by reducing the mass. The transmission of the connecting pieces (40-45) means pushing or pulling the second diaphragm (21 a,21b,21 c) with reference to the first diaphragm 11.

Further, referring to fig. 9 and 10, in the second embodiment of the connecting member, in order to fully utilize the inner space of the connecting member and promote the air connectivity between the first acoustic chamber 5 and the second acoustic chamber 6, the side wall of the connecting member 41 is hollowed, so that the inner space of the connecting member 41 and the air flow channel 33 can realize air circulation, thereby indirectly increasing the effective flow area. It will be appreciated that in other embodiments or in combination, the connection members (40-48) form an air flow channel 33 with the inner wall surface of the through-hole 32, which may further facilitate air connectivity between the first acoustic chamber 5 and the second acoustic chamber 6.

Further, referring to fig. 12, 13 and 15, in the third embodiment of the connecting member, a vent hole 421 is formed in the middle of the side wall of the connecting member 42; or in the fourth embodiment of the connecting piece, the upper end surface and the lower end surface of the connecting piece 43 are both provided with ventilation notches 431, and the promotion of air connectivity between the first acoustic cavity 5 and the second acoustic cavity 6 can be also realized by simply providing the ventilation holes 421 or the ventilation notches 431.

Further, referring to fig. 16, in the fourth embodiment of the connecting member, the side wall of the connecting member 44 is provided with a concave or convex reinforcing portion extending along the circumferential direction of the connecting member 44, so that the area of the upper end surface and the area of the lower end surface of the connecting member 44 are increased, the connecting member 44 is conveniently and fixedly connected with the first diaphragm 11, and the connecting member 44 is fixedly connected with the second diaphragm (21 a,21b,21 c), for example, when glue is used for bonding, the glue is attached to the upper end surface and the lower end surface of the connecting member 44, and the larger the attaching area is, the larger the bonding force is, and the same is true for integral injection molding or welding.

Further, the upper edge of the side wall of the connecting piece 45 is turned inwards to form an upper flanging 451, and the top surface of the upper flanging 451 is level with the upper end surface of the connecting piece 45; the lower edge of the side wall of the connecting member 45 is turned inwardly to form a lower flange, and the bottom surface of the lower flange (not shown) is flush with the lower end surface of the connecting member 45. Similarly, the connection area between the upper flange 451 and the first diaphragm 11 can be increased, so that the fixing strength is improved; and the fixing strength between the connecting piece 45 and the second diaphragm (21 a,21b,21 c) can be improved by providing the turndown.

Further, referring to fig. 18 to 20, in the seventh to ninth embodiments of the connector (46-48), the connector includes an upper connecting portion 461 and a lower connecting portion 462 disposed opposite to each other, and a supporting portion (463a, 463b,463 c) connected between the upper connecting portion 461 and the lower connecting portion 462, wherein the upper connecting portion 461 and the lower connecting portion 462 extend vertically to form a strip shape, the upper connecting portion 461 is fixedly connected with the first diaphragm 11, and the lower connecting portion 462 is fixedly connected with the second diaphragm (21 a,21b,21 c).

In this embodiment, by arranging the connecting elements (46-48) in the form of a bracket consisting of rods, the space occupation is relatively small, the mass is also small, and the holes enclosed by the inside of the bracket can also be used for ventilation.

Further, referring to fig. 18, in the seventh embodiment of the connector, the supporting portion 463a extends in the up-down direction, and the supporting portion 463a is provided with a plurality of supporting portions and is arranged at intervals along the length direction of the upper connecting portion 461 or the lower connecting portion 462. In this embodiment, the upper connecting portion 461 and the lower connecting portion 462 extend transversely, the supporting portion 463a extends vertically, and the plurality of supporting portions 463a, the upper connecting portion 461 and the lower connecting portion 462 enclose to form a plurality of substantially rectangular holes, so that not only transmission strength is ensured, but also quality is small, and in addition, the structural shape of the connecting piece 46 of this embodiment is relatively regular and easy to process and form.

Further, referring to fig. 19, in the eighth embodiment of the connecting member, the supporting portion 463b includes a first section extending downward from one end of the upper connecting portion 461, a second section extending upward from the lower end of the first section along the length direction of the upper connecting portion 461 to the other end of the upper connecting portion 461, and a third section extending downward from one end of the second section away from the first section and connecting to the lower connecting portion 462. In this embodiment, the supporting portion 463b is bent and extended linearly, which occupies a minimum space, and the connecting member 47 is not enclosed to form a closed hole, so that the obstruction to air circulation is small.

Further, referring to fig. 20, in the ninth embodiment of the connecting member, two supporting portions 463c are provided and are obliquely crossed with respect to the up-down direction, so that the connecting member 48 can form a more stable structure with a smaller cross section, and further the space occupation is further reduced.

Further, in order to reduce the weight of the connector (40-48), the connector (40-48) is made of a porous material, and it is understood that the porous material is combined with a cylindrical structure or a bracket-like structure, and the mass of the connector (40-48) can be further reduced.

Further, referring to fig. 3, 4, and 7 to 14, the magnetic circuit system includes a magnetic yoke 34, and a center magnetic circuit portion and a side magnetic circuit portion (neither labeled) disposed on the magnetic yoke 34;

a magnetic gap 31 accommodating the voice coil 12 is formed between the center magnetic circuit portion and the side magnetic circuit portions;

the through hole 32 includes a central through hole 321 provided corresponding to the yoke 34 and the central magnetic circuit portion, the connection members 40-48 are provided to the central through hole 321, and the air flow passage 33 is formed between the connection members 40-48 and the inner wall surface of the central through hole 321.

In this embodiment, since the central portion of the first diaphragm 11 corresponding to the central magnetic circuit portion has the maximum amplitude, the connecting members (40-48) disposed in the central through hole 321 are more labor-saving when pushing the second diaphragms (21 a,21b,21 c) by disposing the central through hole 321 corresponding to the central portion 211 of the first diaphragm 11.

Further, referring to fig. 14 and fig. 21 to 23, in the first to fourth embodiments of the magnetic circuit, the central magnetic circuit portion of the magnetic circuit (3 a,3b,3c,3 d) includes central magnetic steels (35 a,35b,35c,35 d) disposed at the bottom of the magnetic yoke 34, and a magnetic conductive plate 36 disposed at the top of the central magnetic steels (35 a,35b,35c,35 d);

the magnetic yoke 34 is provided with a first inner hole 341, the center magnetic steels (35 a,35b,35c,35 d) are provided with second inner holes (351 a,351b,351c,351 d), the magnetic yoke 34 is provided with a third inner hole 361, and the first inner hole 341, the second inner holes (351 a,351b,351c,351 d) and the third inner hole 361 are communicated to form a center through hole 321.

In this embodiment, the central through hole 321 directly penetrates the magnetic yoke 34, the central magnetic steels (35 a,35b,35c,35 d) and the magnetic conductive plate 36, which has a simple form and is beneficial to promoting the gas communication between the first acoustic cavity 5 and the second acoustic cavity 6. The following describes a preferred form of center magnetic steel:

preferably, referring to fig. 21 and 22, in the second and third embodiments of the magnetic circuit system, the center magnetic steel (35 b,35 c) includes two sub-magnetic steels (352 b,352 c) that are spliced, and the splice joint of the two sub-magnetic steels (352 b,352 c) is connected to the second inner hole (351 a,351b,351c,351 d). In this way, the second inner holes (352 b,352 c) are formed by splicing the two sub-magnetic steels (352 b,352 c), and the inner wall surfaces of the second inner holes (352 b,352 c) are practically converted into the outer peripheral surfaces of the sub-magnetic steels (352 b,352 c), namely the open groove wall surfaces on the outer peripheral surfaces of the sub-magnetic steels (352 b,352 c), so that the second inner holes (351 b,351 c) can be formed for the center magnetic steels (352 b,35 c) conveniently in the machining aspect. Further, in order to facilitate assembly and promote interchangeability of raw materials of the two sub-magnetic steels (352 b,352 c), the two sub-magnetic steels (352 b,352 c) are symmetrical about a vertical plane passing through the center of the second inner hole (351 b,351 c) or the two sub-magnetic steels (352 b,352 c) are symmetrical about the center of the second inner hole (351 b,351 c). Specifically, when the central magnet steel (35 b,35 c) is assembled, blanks before the two sub magnet steels (352 b,352 c) are not magnetized can be spliced first and then magnetized, and the blanks of the two sub magnet steels (352 b,352 c) can be interchanged, so that only blanks with one shape and size are needed to be provided.

Preferably, referring to fig. 23, in the fourth embodiment of the magnetic circuit system, a slit 352d is provided on the center magnetic steel 35d to communicate with the inner wall surface of the second inner hole 351d and the outer peripheral surface of the center magnetic steel 35 d. The provision of the slit 352d may facilitate the machining of the second inner bore 351d by a wire cutting process, and in particular, the slit 352d may be machined first and then the second inner bore 351d may be machined for greater practicality than drilling the second inner bore 351 d.

Further, the first diaphragm 11, the second diaphragms (21 a,21b,21 c) and the central magnetic steels (35 a,35b,35c,35 d) are all long strips, long axes of the first diaphragm 11, the second diaphragms (21 a,21b,21 c) and the central magnetic steels (35 a,35b,35c,35 d) are located in the same vertical plane, and the central through holes 321 extend along the length direction of the central magnetic steels (35 a,35b,35c,35 d).

In the present embodiment, it is understood that the vertical plane is a plane parallel to the up-down direction, and since the first diaphragm 11, the second diaphragms (21 a,21b,21 c) and the center magnetic steels (35 a,35b,35c,35 d) are elongated, the external shape of the speaker 210 is also elongated accordingly, and the space utilization rate is higher when the structure is applied to the portable terminal 100 than the circular shape. Meanwhile, on the premise of the same area, the first vibrating diaphragm 11 and the second vibrating diaphragms (21 a,21b,21 c) which are in long strips are easier to obtain larger vibration amplitude, the first vibrating diaphragm 11 can drive the connecting pieces (40-48) to move to form larger vibration amplitude, and the second vibrating diaphragms (21 a,21b,21 c) are correspondingly easier to push the connecting pieces (40-48).

Preferably, in order to reduce the weight of the connecting piece (40-48) and increase the connection strength with the first vibrating diaphragm 11 and the second vibrating diaphragm (21 a,21b,21 c), the connecting piece (40-48) is hollow and cylindrical, is arranged with an upper opening and a lower opening, the upper end surface of the connecting piece (40-48) is fixedly connected with the first vibrating diaphragm 11, and the lower end surface is fixedly connected with the second vibrating diaphragm (21 a,21b,21 c); the cross section of the connecting piece (40-48) is long, and the long axis of the cross section of the connecting piece (40-48) and the long axis of the central through hole 321 are located in the same vertical plane, so that the connecting area of the connecting piece (40-48) and the first vibrating diaphragm 11 and the second vibrating diaphragms (21 a,21b,21 c) is increased.

Preferably, in order to reduce the weight of the connector (40-48) and increase the connection strength with the first diaphragm 11 and the second diaphragm (21 a,21b,21 c), the connector (40-48) includes an upper connecting portion 461 and a lower connecting portion 462 which are disposed opposite to each other up and down, and a supporting portion connected between the upper connecting portion 461 and the lower connecting portion 462, the upper connecting portion 461 is fixedly connected with the first diaphragm 11, the lower connecting portion 462 is fixedly connected with the second diaphragm (21 a,21b,21 c), and the central axes of the upper connecting portion 461, the lower connecting portion 462 and the supporting portion are located in the same vertical plane with the long axis of the central through hole 321, and since the circumferential surface of the upper connecting portion 461 is used for connecting with the first diaphragm 11, the connection area is large, and the corresponding connection strength is high; in the same way, the peripheral surface of the lower connecting portion 462 is used for connecting with the second diaphragms (21 a,21b,21 c), and the connection strength of the connecting pieces (40-48) and the second diaphragms (21 a,21b,21 c) can be ensured.

Further, the magnetic circuit system comprises a magnetic yoke 34 and a center magnetic circuit part and a side magnetic circuit part (neither labeled) which are arranged on the magnetic yoke 34;

the through hole 32 includes a side through hole 322 provided outside the central magnetic circuit portion;

the side through hole 322 is provided in the yoke 34;

alternatively, the speaker 210 includes a housing 7 to which the magnetic circuit is fixed, and the side through hole 322 is provided in the housing 7 or between the housing 7 and the side portion of the magnetic yoke 34.

In this embodiment, the side through hole 322 may be separately disposed, and may be disposed on the outer side of the magnetic yoke and located on the outer side of the central magnetic circuit, or may be disposed on the housing 7 of the magnetic circuit system, or may be disposed on the housing 7 or between the housing 7 and the side portion of the magnetic yoke 34. The connection between the first acoustic chamber 5 and the second acoustic chamber 6 is further increased by the through-hole 322 in the above embodiment in combination with the air flow channel 33, so that when the first diaphragm 11 vibrates, more air can flow between the first acoustic chamber 5 and the second acoustic chamber 6 in unit time, the air pressure between the first acoustic chamber 5 and the second acoustic chamber 6 is more balanced, and the resistance is smaller.

Further, in order to increase the flow area as much as possible, the side through holes 322 are provided in plurality, and the plurality of side through holes 322 are arranged at intervals in the circumferential direction of the magnetic gap 31. Thus, the balance of communication can be ensured, and the magnetic circuits can be communicated in an equalizing way. Specifically, the magnetic circuit system (3 a,3b,3c,3 d) includes a magnetic yoke 34, center magnetic steels (35 a,35b,35c,35 d) provided at the bottom of the magnetic yoke 34, and a magnetic conductive plate 36 provided at the top of the center magnetic steels (35 a,35b,35c,35 d); the magnetic yoke 34 is provided with a first inner hole 341, the center magnetic steels (35 a,35b,35c,35 d) are provided with second inner holes (351 a,351b,351c,351 d), the magnetic yoke 34 is provided with a third inner hole 361, the first inner hole 341, the second inner holes (351 a,351b,351c,351 d) and the third inner hole 361 are communicated to form a center through hole 321, and the edge through hole 322 is arranged at the bottom of the magnetic yoke 34. Since the bottom of the magnetic yoke 34 is closest to the second sound cavity 6 than the center magnetic steels (35 a,35b,35c,35 d) and the magnetic plate 36, the processing of the side through hole 322 at the bottom of the magnetic yoke 34 is also most convenient.

Referring to fig. 24 to 27, further, the connecting member 49 is at least partially disposed in the side through hole 322.

In this embodiment, the connecting member 49 has two parts for respectively connecting the first diaphragm 11 and the second diaphragms (21 a,21b,21 c), and the side through hole 322 may be used to completely accommodate the connecting member 48, or may accommodate only a part of the connecting member 49, and the other part of the connecting member 49 is located outside the side through hole 322.

Further, the side through holes 322 include a plurality of side through holes 322 disposed at intervals, the connecting member 49 includes a connecting base plate 491 and a plurality of connecting protrusions 493 protruding on the connecting base plate 491, the connecting base plate 491 is fixedly connected with one of the first diaphragm 11 and the second diaphragm (21 a,21b,21 c), and ends of the plurality of connecting protrusions 493 respectively pass through the plurality of side through holes 322 one by one and are fixedly connected with the other of the first diaphragm 11 and the second diaphragm (21 a,21b,21 c).

In this embodiment, the connecting member 49 includes a connecting base plate 491 and a connecting protrusion 493, the connecting base plate 491 may be plate-shaped, the connecting protrusion 493 is perpendicular to or inclined to the connecting base plate 491, and the connecting area between the connecting member 49 and the first diaphragm 11 or the second diaphragms (21 a,21b,21 c) can be increased by the connecting base plate 491 and the plurality of connecting protrusions 493, so as to increase the amplitude and improve the sound effect of the first diaphragm 11 and the second diaphragms (21 a,21b,21 c).

On the basis of the above embodiment, the two ends of the magnetic yoke 34 are flat, the side through holes 322 at least include two ends provided at the two ends of the magnetic yoke 34, the connection base 491 is connected to the second diaphragm (21 a,21b,21 c), and the connection protrusion 493 is connected to the first diaphragm 11.

In this embodiment, the magnetic yoke 34 is in a flat plate shape, and has a through hole 322 formed thereon, so that the convenience of processing can be improved, the connection base plate 491 is connected with the second diaphragm (21 a,21b,21 c), at least two connection protrusions 493 are connected with the first diaphragm 11, and the stability and connection strength of the connection between the first diaphragm 11 and the second diaphragm (21 a,21b,21 c) can be ensured, so that the second diaphragms (21 a,21b,21 c) can effectively vibrate along with the vibration of the first diaphragm 11, and the sound production effect can be improved.

When the connecting protrusion 493 of the connecting member 49 is disposed in the side through hole 322, the connecting protrusion 493 is disposed in a plate shape; the end of the connecting protrusion 493 is formed with a connecting flange 495 that is bent inwards, outwards, or partially inwards and partially outwards; and/or

The connecting protrusion 493 is provided in a plate shape, and a side reinforcing portion (not shown) connected to the connecting base plate 491 is formed by bending and extending the lower end of the side edge of the connecting protrusion 493 inward; and/or

The lower end of the inner side of the connecting convex part 493 is provided with a reinforcing rib (not labeled) connected with the connecting bottom plate 491; and/or

The connecting bottom plate 491 is arranged in a hollowed-out shape; and/or

The connecting protruding portion 493 is in a plate shape, and the connecting protruding portion 493 is in a hollowed-out shape; and/or

The connection base 491 is provided in a square, circular, racetrack or oval shape.

In this embodiment, the structure of the connecting protrusion 493 may refer to the structure of the connecting member disposed in the central through hole 321, that is, by disposing the connecting flange 495, the side reinforcing portion and the reinforcing rib at the upper end or the lower end of the connecting protrusion 493, the connecting area of the connecting member and the first diaphragm 11 and the second diaphragms (21 a,21b,21 c) is increased, thereby enhancing the connecting strength and improving the stability. Meanwhile, by arranging the hollowed-out parts on the connecting bottom plate 491 and/or the connecting convex 493, not only the transmission strength is ensured, but also the weight is reduced, and the processing and the forming are easy. The shape of the connection base 491 can be set according to the shape of the second diaphragms (21 a,21b,21 c), the contact area can be increased, the weight can be reduced, the connection stability can be improved, and the transmission effect can be improved.

Further, referring to fig. 3 to 6, and fig. 13, the first diaphragm 11 includes a planar sheet-shaped first central portion, a first ring portion disposed around the first central portion, and a first fixing portion disposed around the first ring portion; the connection protrusion is fixed to the first center portion, the first collar portion is a structure formed of one protrusion, or the first collar portion is a wave-shaped structure formed of at least one protrusion and at least one recess, and the second diaphragm (21 a,21b,21 c) includes a second center portion 211, second collar portions (212 a,212 b) disposed around the second center portion 211, and second fixing portions 213 disposed around the second collar portions (212 a,212 b); the second central portion 211 has a planar sheet structure, and in the first and second embodiments of the second diaphragm, the second ring-folded portion 212a has a structure formed by one protrusion, or the second ring-folded portion 212b has a wave-shaped structure formed by at least one protrusion and at least one recess.

In this embodiment, the second center portion 211 is configured to bear the force of the connecting members (40-48) and vibrate to generate sound, that is, to generate radiation in a linkage manner, and by configuring the second center portion 211 to have a planar sheet-like structure, the second diaphragms (21 a,21b,21 c) occupy a small space in the up-down direction and can generate a sufficiently large amplitude. While the second folded portions (212 a,212 b) provide a certain compliance to the movement of the second central portion 211, i.e., a certain flexibility, so that the second central portion 211 is more easily pushed by the air flow passing through the central through hole 321 and the side through holes 322.

The first diaphragm 11 has a structure similar to that of the second diaphragms (21 a,21b,21 c), and specifically includes a planar sheet-like first center portion, a first ring-folded portion provided around the first center portion, and a first fixing portion provided around the first ring-folded portion; the connecting convex part is fixed on the first central part, and the first folding ring part is of a structure formed by one bulge, or is of a wave-shaped structure formed by at least one bulge and at least one concave. After the embodiment that the central parts of the second diaphragms (21 a,21b and 21 c) are also arranged to be of the sheet-shaped structure is combined, the loudspeaker body provided by the invention is integrally formed to be of a thinner structure in the up-down direction, so that the loudspeaker body is easier to apply to a flat installation space.

Further, referring to fig. 7 and 8, in the third embodiment of the second diaphragm, the second diaphragm 21c further includes a composite layer 214 combined with the central portion 211, and the lower ends of the connecting members (40-48) are fixedly connected to the composite layer 214 or the central portion 211. The provision of the composite layer 214 may reduce the quality of the second diaphragm 21c, ensuring that the second diaphragm 21c is more easily pushed by the air flow. Preferably, in order to ensure that the sounding performance of the passively radiating second diaphragm 21c is better, the composite layer 214 is made of a material having a higher specific modulus, for example, an aluminum composite material, aluminum magnesium alloy, magnesium lithium alloy material, carbon fiber, PEN (polyethylene naphthalate), LCP (Liquid Crystal Polymer liquid crystal polymer), foam, or the like.

Referring to fig. 28 to 30, the present invention further provides a portable terminal 100, including a housing 110, where a housing cavity 120 is provided in the housing 110, the portable terminal 100 further includes a speaker 210, and the specific structure of the speaker 210 refers to the foregoing embodiments, and since the portable terminal 100 adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are not described herein in detail.

In this embodiment, the speaker 210 is mounted in the accommodating cavity 120, and the housing 110 is provided with a first sound hole 130 corresponding to the first diaphragm 11 and a second sound hole 140 corresponding to the second diaphragms (21 a,21b,21 c). Preferably, in order to shorten the propagation path of the sound inside the housing 110 and reduce the acoustic resistance, the first sound hole 130 is formed at a position facing the first diaphragm 11 of the housing 110, and the second sound hole 140 is formed at a position facing the second diaphragms (21 a,21b,21 c) of the housing 110.

Specifically, the housing 110 has a front surface and a back surface that are disposed opposite to each other, the first sound hole 130 is disposed on the front surface of the housing 110, and the second sound hole 140 is disposed on the back surface of the housing 110;

the space of the first diaphragm 11 away from the second diaphragms (21 a,21b,21 c) is communicated with the first sound hole 130, and the first sound hole 130 is used for conducting sound emitted by the first diaphragm 11;

the space of the second diaphragm (21 a,21b,21 c) away from the first diaphragm 11 communicates with the second sound hole 140, and the second sound hole 140 is used for conducting sound emitted by the second diaphragm (21 a,21b,21 c).

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A loudspeaker is characterized by comprising a first vibration system, a second vibration system, a magnetic circuit system and a connecting piece, wherein,

the connecting piece is arranged in the through hole, the upper end of the connecting piece is fixedly connected with the first vibrating diaphragm, and the lower end of the connecting piece is fixedly connected with the second vibrating diaphragm;

the magnetic circuit system comprises a magnetic yoke, a central magnetic circuit part and a side magnetic circuit part, wherein the central magnetic circuit part and the side magnetic circuit part are arranged on the magnetic yoke;

the side through holes are arranged on the magnetic yoke;

or the loudspeaker comprises a shell for fixing the magnetic circuit system, and the side through hole is arranged on the shell or between the shell and the side part of the magnetic yoke;

The connecting piece is at least partially arranged on the side through hole;

the side through holes comprise a plurality of side through holes which are arranged at intervals,

the connecting piece comprises a connecting bottom plate and a plurality of connecting convex parts which are convexly arranged on the connecting bottom plate, wherein the connecting bottom plate is fixedly connected with one of the first vibrating diaphragm and the second vibrating diaphragm, and the end parts of the plurality of connecting convex parts respectively pass through the plurality of side through holes in a one-to-one correspondence manner and are fixedly connected with the other one of the first vibrating diaphragm and the second vibrating diaphragm;

the two ends of the magnetic yoke are flat plates, the side through holes at least comprise two parts arranged at the two ends of the magnetic yoke, the connecting bottom plate is connected with the second vibrating diaphragm, and the connecting convex part is connected with the first vibrating diaphragm;

the connecting convex part is arranged in a plate shape.

2. The loudspeaker of claim 1, wherein the through hole is provided on the magnetic circuit system.

3. The loudspeaker of claim 1, wherein the connecting member is hollow and is provided with an upper opening and a lower opening, an upper end surface of the connecting member is fixedly connected with the first diaphragm, and a lower end surface of the connecting member is fixedly connected with the second diaphragm.

4. The loudspeaker of claim 2, wherein the side wall of the connecting piece is hollow, the middle part of the side wall of the connecting piece is provided with a vent hole or the upper end face and the lower end face of the connecting piece are provided with vent notches.

5. A loudspeaker according to claim 2, wherein the side walls of the connector are provided with a recess or raised reinforcement extending in the circumferential direction of the connector.

6. The loudspeaker of claim 2, wherein the upper edge of the side wall of the connector is turned inwardly to form an upturned edge, and the top surface of the upturned edge is flush with the upper end surface of the connector; the lower edge of the side wall of the connecting piece is turned inwards to form a lower flanging, and the bottom surface of the lower flanging is flush with the lower end surface of the connecting piece.

7. The loudspeaker of claim 1, wherein the connecting member comprises an upper connecting portion and a lower connecting portion which are disposed opposite to each other, and a supporting portion connected between the upper connecting portion and the lower connecting portion, the upper connecting portion and the lower connecting portion each extend vertically to be elongated, the upper connecting portion is fixedly connected with the first diaphragm, and the lower connecting portion is fixedly connected with the second diaphragm.

8. A loudspeaker according to claim 7,

The support part comprises a first section extending downwards from one end of the upper connecting part, a second section extending upwards from the lower end of the first section to the other end of the upper connecting part along the length direction of the upper connecting part, and a third section extending downwards from one end of the second section far away from the first section and connected with the lower connecting part; or alternatively

9. A loudspeaker according to any one of claims 1 to 8, wherein the connector is made of a porous material.

10. A loudspeaker according to any one of claims 1 to 8,

11. The loudspeaker of claim 10, wherein the central magnetic circuit portion comprises a central magnetic steel disposed at the bottom of the magnetic yoke, and a magnetic conductive plate disposed at the top of the central magnetic steel;

12. The sound generating device according to claim 1 or 2, wherein the end portion of the connecting protrusion is formed with a connecting flange which is bent inward, outward, or partially inward and partially outward; and/or

The lower ends of the side edges of the connecting convex parts are inwards bent and extended to form side reinforcing parts connected with the connecting bottom plate; and/or

The connecting bottom plate is arranged in a hollowed-out shape; and/or

The connecting convex part is arranged in a hollowed-out shape; and/or

The connecting bottom plate is square, round, runway-shaped or oval.

13. The sound generating device of claim 1 or 2, wherein the first diaphragm includes a planar sheet-like first center portion, a first ring-folded portion disposed around the first center portion, and a first fixed portion disposed around the first ring-folded portion; the connecting convex part is fixed at the first central part, and the first folding ring part is of a structure formed by one bulge, or is of a wave-shaped structure formed by at least one bulge and at least one concave; and/or

14. The loudspeaker of claim 13, wherein the second diaphragm further comprises a composite layer bonded to the center portion, and the lower end of the connector is fixedly connected to the composite layer or the center portion.

15. A portable terminal comprising a housing having a receiving cavity therein, and further comprising the speaker of claims 1-14, the speaker being mounted in the receiving cavity, the housing having a first sound hole corresponding to the first diaphragm and a second sound hole corresponding to the second diaphragm.

16. The portable terminal according to claim 15, wherein the housing has a front face and a back face disposed opposite to each other, the first sound hole being provided on the front face of the housing, and the second sound hole being provided on the back face of the housing;