CN211930864U - Loudspeaker - Google Patents

Abstract

The utility model discloses a loudspeaker, wherein, loudspeaker includes auxiliary system, vibration system and magnetic circuit, auxiliary system includes the casing that is used for accommodating fixed vibration system and magnetic circuit, vibration system includes the vibrating diaphragm, magnetic circuit includes central magnet and the limit magnet that sets up around the central magnet, one side that central magnet is close to the vibrating diaphragm is provided with central magnetic conduction board, one side that limit magnet is close to the vibrating diaphragm is provided with limit magnetic conduction board, wherein, the casing includes front cover, mesochite and inferior valve that distribute and connect gradually along vibration system's vibration direction; the vibrating diaphragm is injected into the middle shell or is formed by adopting a solid rubber material through a hot pressing process and is combined with the middle shell; the edge magnetic conduction plate and the lower shell are integrally injection molded. The utility model discloses the speaker has reduced the processing degree of difficulty of speaker, and has improved the connection reliability of limit magnetic conduction board, and then improves the performance and the quality of speaker for the acoustic performance of speaker is more stable.

Description

Loudspeaker

Technical Field

The utility model relates to an acoustics technical field, in particular to speaker.

Background

A speaker plays an indispensable role in a sound reproduction system as a common electroacoustic transducer device for converting electric energy into acoustic energy. The loudspeaker device comprises a vibration system, a magnetic circuit system and an auxiliary system. In order to improve the acoustic performance of the speaker device, the magnetic circuit system of the speaker device usually adopts a multi-magnetic circuit structure, which includes a central magnet and a side magnet disposed around the central magnet, and a central magnetic conductive plate and a side magnetic conductive plate are respectively disposed on the sides of the central magnet and the side magnet close to the vibration system.

In the related art, the diaphragm is molded in the plastic housing by injection molding or hot pressing. However, because the mold has an inverted structure, the edge magnetic conductive plate and the vibrating diaphragm can not be integrally molded in the middle shell, so that the edge magnetic conductive plate can only be connected to the shell in a bonding manner. In the bonding process, the bonding is realized by means of tool equipment, the process is complicated, and the production efficiency is low. And, receive external environment's influence, the adhesive property of glue can reduce gradually, makes limit magnetic conduction board location insecure, has reduced speaker device's reliability.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a speaker that the reliability is high, acoustic performance is good.

In order to achieve the above object, the speaker of the present invention comprises an auxiliary system, a vibration system and a magnetic circuit system, wherein the auxiliary system comprises a housing for accommodating and fixing the vibration system and the magnetic circuit system, the vibration system comprises a vibrating diaphragm, the magnetic circuit system comprises a central magnet and a side magnet surrounding the central magnet, a central magnetic conductive plate is disposed on one side of the central magnet close to the vibrating diaphragm, a side magnetic conductive plate is disposed on one side of the side magnet close to the vibrating diaphragm, wherein,

the shell comprises a front cover, a middle shell and a lower shell which are distributed along the vibration direction of the vibration system and are sequentially connected;

the vibrating diaphragm is injected into the middle shell or is formed by adopting a solid rubber material through a hot pressing process and is combined on the surface of the middle shell;

the edge magnetic conduction plate and the lower shell are integrally formed by injection molding.

In one embodiment, the speaker further includes a conductive member for conducting internal and external circuits of the speaker, and the conductive member and the lower case are integrally injection-molded.

In an embodiment, the vibration system further includes a voice coil fixed to one side of the diaphragm, and the conductive member is in conduction with a lead of the voice coil.

In an embodiment, the vibration system further includes a centering pad and a voice coil, one end of the voice coil is connected to the vibrating diaphragm, the other end of the voice coil is connected to the centering pad, and the centering pad is connected to the lower case and is conducted to the conductive member.

In one embodiment, the lower shell has a plurality of side walls distributed along the circumferential direction of the lower shell, two adjacent side walls are arranged at an included angle to form a corner, and the conductive member is arranged at the corner.

In an embodiment, the wall thickness of the corner is greater than the wall thickness of the side wall.

In an embodiment, the auxiliary system further includes a magnetic yoke fixed to a side of the lower case facing away from the diaphragm, and the conductive member includes at least two pad portions, and the plurality of pad portions surround the periphery of the magnetic yoke and are exposed to the bottom surface of the lower case.

In one embodiment, a long side of the side magnetic conduction plate is provided with a limiting notch, and the lower shell is provided with a limiting bulge matched with the limiting notch.

In one embodiment, an annular bulge is arranged on the inner wall surface of the middle shell, the diaphragm comprises an edge part connected with the inner wall surface of the middle shell, and an annular groove matched with the annular bulge is formed on the edge part.

In one embodiment, one of the front cover and the lower shell is fixed to the middle shell by laser welding, and the other is fixed to the middle shell by adhesion.

In one embodiment, the diaphragm is formed by injection molding of a liquid silicon rubber material and is combined with the surface of the middle shell; alternatively, the first and second electrodes may be,

the diaphragm is made of one of solid silicon rubber, AEM rubber or ACM rubber through hot pressing and is combined with the surface of the middle shell.

The utility model discloses an add protecgulum and inferior valve, for vibration system provides the protection, with mesochite and inferior valve components of a whole that can function independently shaping for the vibrating diaphragm can combine on the mesochite through the mode of moulding plastics or hot pressing, and limit magnetic conduction board can with the integrative injection moulding of inferior valve, has reduced the processing degree of difficulty of speaker, and has improved the connection reliability of limit magnetic conduction board, and then improves the performance and the quality of speaker, makes the acoustic performance of speaker more stable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

fig. 2 is a schematic cross-sectional structure view of the speaker of fig. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic bottom view of the speaker of FIG. 1;

fig. 5 is an exploded view of the speaker of fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						110	Vibrating diaphragm	240	Edge magnetic conduction plate	332	Corner part
111	Annular groove	241	Spacing gap	333	Spacing protrusion
						120	Voice coil	310	Front cover	340	Magnetic conductive yoke
130	CenteringSupport piece	320	Middle shell	400	Conductive member
						210	Center magnet	321	Annular protrusion	410	Pad part
220	Edge magnet	330	Lower casing
						230	Central magnetic conduction plate	331	Side wall

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be noted that if the embodiments of the present invention are described with reference to "first", "second", etc., the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a loudspeaker.

In the embodiment of the present invention, as shown in fig. 1 to fig. 5, the speaker includes an auxiliary system, a vibration system and a magnetic circuit system, the auxiliary system includes a casing for accommodating the fixed vibration system and the magnetic circuit system, the vibration system includes a diaphragm 110, the magnetic circuit system includes a central magnet 210 and a side magnet 220 disposed around the central magnet 210, one side of the central magnet 210 close to the diaphragm 110 is provided with a central magnetic conductive plate 230, and one side of the side magnet 220 close to the diaphragm 110 is provided with a side magnetic conductive plate 240. Typically, two side magnetic plates 240 are provided, and are disposed on opposite sides of the central magnetic plate 230. Center magnet 210 and edge magnets 220 are used to generate magnetic flux lines, and center plate 230 and edge plates 240 are used to concentrate the magnetic flux to form a magnetic gap between center plate 230 and edge plates 240.

Specifically, the housing includes a front cover 310, a middle case 320, and a lower case 330, which are distributed along a vibration direction of the vibration system and are sequentially connected. The diaphragm 110 is injection-molded on the middle case 320 or is formed by hot-pressing a solid rubber material and is bonded to the surface of the middle case 320. The edge magnetic conductive plate 240 and the lower casing 330 are integrally injection molded.

In this embodiment, the front cover 310, the middle shell 320 and the lower cover are sequentially and fixedly connected along the vibration direction of the diaphragm 110 to form a support system, and the vibration system is accommodated in the support system. The protective frame is formed by disposing the front cover 310 to be engaged with the middle case 320 and the lower case 330. A sound outlet hole through which sound is emitted is generally provided on the front cover 310. The front cover 310 and the middle case 320, and the middle case 320 and the lower case 330 may be coupled by means of glue bonding or laser welding. Diaphragm 110 may be injection molded integrally with center housing 320. The diaphragm 110 may also be formed by a hot pressing process using a solid rubber material and bonded to the surface of the middle shell 320. That is, the diaphragm 110 is combined with the middle case 320 while being molded. The diaphragm 110 and the middle shell 320 are combined in an injection molding or hot pressing mode, so that the fixing steps of the diaphragm 110 and the middle shell 320 can be reduced, and the processing efficiency is improved. The diaphragm 110 specifically includes an edge portion, a corrugated portion of a concave/convex structure integrally disposed with the edge portion, and a planar portion disposed inside the corrugated portion, wherein the reinforcing portion is disposed on the planar portion of the diaphragm 110, and is mainly used for adjusting the acoustic performance of the speaker. Specifically, the edge portion of the diaphragm 110 is integrally injection-molded with the middle case 320 or bonded to the inner surface of the middle case 320 by hot press.

In a specific embodiment, the diaphragm 110 is formed by injection molding using a liquid silicone rubber material and is bonded to the surface of the middle shell 320; alternatively, the diaphragm 110 is formed by hot pressing and bonded to the surface of the middle case 320 using one of solid silicon rubber, AEM rubber (ethylene acrylate rubber), or ACM rubber (acrylate rubber). The cohesion of vibrating diaphragm 110 with mesochite 320 has been improved on the one hand, has guaranteed sound generating mechanism's leakproofness, on the other hand vibrating diaphragm 110 adopts more than the material, its vibrating diaphragm 110 of making with conventional polymer plastics compares, the utility model discloses the rubber material has lower young modulus, the utility model provides a vibrating diaphragm 110 has wideer elasticity region, good pliability, and vibrating diaphragm 110's vibration displacement is bigger, and the loudness is bigger, is difficult for appearing reliability problems such as rupture of membranes.

Because the mold has an inverted structure, the side magnetic plate 240 and the diaphragm 110 cannot be simultaneously injected onto the middle shell 320, so that the side magnetic plate 240 can only be bonded and fixed with the middle shell 320, however, the bonded side magnetic plate 240 is easy to fall off the magnetic circuit, and the reliability of the speaker is poor. Through making mesochite 320 and inferior valve 330 components of a whole that can function independently shaping, then can realize that vibrating diaphragm 110 moulds plastics or hot pressing on mesochite 320, limit magnetic conduction board 240 and the integrative injection moulding of inferior valve 330 to improve limit magnetic conduction board 240's connection reliability, solve the problem that limit magnetic conduction board 240 drops easily, improve product quality.

The utility model discloses an add protecgulum 310 and inferior valve 330, for vibration system provides the protection, with mesochite 320 and inferior valve 330 components of a whole that can function independently shaping, make vibrating diaphragm 110 can combine on mesochite 320 through the mode of moulding plastics or hot pressing, limit magnetic conduction board 240 can with the integrative injection moulding of inferior valve 330, reduced the processing degree of difficulty of speaker, and improved limit magnetic conduction board 240's connection reliability, and then improve the performance and the quality of speaker, make the acoustic performance of speaker more stable.

In an embodiment, referring to fig. 4, the speaker further includes a conductive member 400 for conducting internal and external circuits of the speaker, and the conductive member 400 and the lower case 330 are integrally injection-molded.

In this embodiment, conductive member 400 is disposed on the housing to form a pad for facilitating internal circuit connection with voice coil 120, spider 130, and the like. The conductive member 400 may be directly contacted with a contact to implement external circuit connection of the speaker, and the conductive member FPC may be directly soldered to the conductive member 400 to implement external circuit connection. The conductive member 400 is made of metal, such as copper, aluminum, iron, or other metal materials. It is understood that the conductive member 400 is integrally injection molded with the lower case 330, and the conductive member 400 is injection molded on the lower case 330. The pad part 410 of the conductive member 400 is at least partially exposed at the bottom surface of the lower case 330, thereby facilitating electrical connection with an external circuit. Through moulding plastics electrically conductive 400, compare in moulding plastics FPC, can avoid FPC bending fracture and surpass the outer wall setting of casing. And the lower shell 330 and the middle shell 320 are formed separately, so that the conductive member 400 can be integrally injection-molded with the lower shell 330, thereby improving the quality and performance of the speaker.

On the basis of the above embodiments, as shown in fig. 2 and fig. 5, the vibration system further includes a voice coil 120 fixed on one side of the diaphragm 110, and the conductive member 400 is in conduction with a lead of the voice coil 120.

In this embodiment, voice coil 120 is disposed on a side of diaphragm 110 adjacent to central magnet 210. A magnetic gap is provided between the center magnet 210 and the side magnet 220, and the voice coil 120 is suspended in the magnetic gap. Voice coil 120 is used to cut the magnetic induction lines to generate vibration during the operation of the speaker, so as to drive diaphragm 110 to vibrate, and diaphragm 110 vibrates to push air repeatedly, so that the speaker makes a sound. The voice coil 120 includes a bobbin of the voice coil 120, a coil of the voice coil 120 wound around the bobbin of the voice coil 120, and a lead wire of the voice coil 120 electrically connected to the coil of the voice coil 120. By making the conductive member 400 conductive to the lead of the voice coil 120, the connection stability of the conductive member 400 and the internal circuit of the speaker can be ensured.

In another embodiment, the vibration system further includes a damper 130 and a voice coil 120, one end of the voice coil 120 is connected to the diaphragm 110, the other end is connected to the damper 130, and the damper 130 is connected to the lower case 330 and is in communication with the conductive member 400.

In this embodiment, the centering branch piece 130 may be annular, or may be two pieces with central symmetry. The centering leg 130 is bent in a plane to form an inner edge and an outer edge, one end of the inner edge and one end of the outer edge are connected, and the other end forms a free end. The voice coil 120 is placed on an inner edge of the damper 130 to perform up-and-down vibration, and is electrically connected to the damper 130. The outer edge of the spider 130 is fixedly connected to the lower case 330, where it can be directly welded to the conductive member 400, thereby conducting the voice coil 120 and the conductive member 400, and further realizing the connection of the internal and external circuits of the speaker. Voice coil 120 is conducted with conductive member 400 through spider 130, and the product reliability is high and the acoustic performance is stable.

In an embodiment, referring to fig. 4 and 5, the lower shell 330 has a plurality of side walls 331 distributed along a circumferential direction thereof, two adjacent side walls 331 are disposed at an included angle to form a corner portion 332, and the conductive member 400 is disposed at the corner portion 332. The conductive members 400 are disposed on the bottom wall between the two sidewalls 331 of the lower case 330. By disposing the conductive member 400 at the corner 332 of the lower case 330, the space of the corner 332 of the lower case 330 can be sufficiently utilized, making the entire structure more compact and stable. And the thickness of the corner 332 of the lower case 330 is relatively large, so that the injection molding of the conductive device 400 is easier and more reliable, and the processing difficulty is reduced.

In addition to the above embodiment, the wall thickness of the corner portion 332 is larger than that of the side wall 331. Since the mold has an inverted structure, diaphragm 110 and conductive device 400 cannot be simultaneously injection-molded onto the inner wall surface of middle shell 320, if conductive device 400 is injection-molded, only sidewall 331 of middle shell 320 can be injection-molded, and since the wall thickness of middle shell 320 is too thin, conductive device 400 cannot be injection-molded. Through making middle casing 320 and lower casing 330 split molding, mould plastics conductive piece 400 in the bight 332 of lower casing 330, and make the wall thickness of bight 332 be greater than the wall thickness of lateral wall 331 to can realize moulding plastics conductive piece 400, and mould plastics conductive piece 400 at bight 332 and be convenient for outside circuit connection more, further improve product quality and performance.

In practical applications, as shown in fig. 4 and 5, the auxiliary system further includes a magnetic conductive yoke 340, the magnetic conductive yoke 340 is fixed on a side of the lower shell 330 away from the diaphragm 110, the conductive member 400 includes at least two pad portions 410, and the plurality of pad portions 410 surround the periphery of the magnetic conductive yoke 340 and are exposed on the bottom surface of the lower shell 330.

In the present embodiment, the magnetic yoke 340 is used to fix the magnet and correct the magnetic field lines. It is understood that the lower surface of the pad part 410 is exposed at the bottom surface of the lower case 330 for connection with an external circuit. By making conductive member 400 include at least two pad portions 410, connection points of the speaker to an external circuit are increased, thereby improving the usability of the speaker. The plurality of pad portions 410 are arranged around the outer periphery of the magnetic yoke 340, and the space between the sidewall 331 of the lower case 330 and the magnetic yoke 340 is fully utilized, so that the overall structure is more compact, and the layout is more reasonable.

In an embodiment, referring to fig. 5, the long side of the side magnetic conductive plate 240 is provided with a limiting notch 241, and the lower shell 330 is provided with a limiting protrusion 333 adapted to the limiting notch 241. The limiting notch 241 may be a U-shaped notch. The number of the limiting notches 241 can be multiple, and the limiting notches 241 are arranged at intervals along the length direction of the edge magnetic conduction plate 240. Through set up spacing breach 241 on the long limit at limit magnetic conduction board 240, and set up the spacing arch 333 of adaptation on inferior valve 330, then this breach is used for the in-process rubber coating of moulding plastics at limit magnetic conduction board 240 and inferior valve 330 to greatly increased the intensity of limit magnetic conduction board 240 on inferior valve 330, solved the problem that limit magnetic conduction board 240 easily drops, promote product quality.

In one embodiment, as shown in fig. 2 and 3, an annular protrusion 321 is disposed on an inner wall surface of the middle shell 320, and the diaphragm 110 includes an edge portion connected to the inner wall surface of the middle shell 320, and an annular groove 111 adapted to the annular protrusion 321 is formed on the edge portion. Through set up annular groove 111 at the edge portion of vibrating diaphragm 110, and set up spacing arch 333 at the internal wall face of lower shell 330, this annular groove 111 is used for the in-process rubber coating of moulding plastics at vibrating diaphragm 110 and mesochite 320 to greatly increased the intensity of vibrating diaphragm 110 on mesochite 320, solved the problem that vibrating diaphragm 110 easily drops, promote product quality. Meanwhile, the annular groove 111 is formed in the process of hot press molding of the diaphragm 110 and the middle shell 320, so that the contact area between the diaphragm 110 and the middle shell 320 is increased, the connection stability between the diaphragm 110 and the middle shell 320 is improved, and the problem that the diaphragm 110 is easy to fall off is solved.

In a preferred embodiment, one of the front cover 310 and the lower case 330 is fixed to the middle case 320 by laser welding, and the other is fixed to the middle case 320 by bonding.

In the present embodiment, one of the front cover 310 and the lower case 330 and the middle case 320 may be fixed by laser welding, and the other and the middle case 320 may be fixed by adhesion; for example, the front cover 310 and the middle case 320 are fixed by laser welding, and the lower case 330 and the middle case 320 are fixed by adhesion. The laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source, has the characteristics of high welding speed and large depth-to-width ratio, and can be accurately applied to precision welding of micro and small parts. Only one of the front cover 310 or the lower shell 330 is fixed with the middle shell 320 by laser welding, and the other is fixed by bonding, so that the middle shell 320 can be prevented from being subjected to laser welding for multiple times, the welding quality is ensured, and the structural stability is improved.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (11)

1. A loudspeaker comprises an auxiliary system, a vibration system and a magnetic circuit system, wherein the auxiliary system comprises a shell for accommodating and fixing the vibration system and the magnetic circuit system, the vibration system comprises a vibrating diaphragm, the magnetic circuit system comprises a central magnet and a side magnet arranged around the central magnet, a central magnetic conductive plate is arranged on one side of the central magnet close to the vibrating diaphragm, and a side magnetic conductive plate is arranged on one side of the side magnet close to the vibrating diaphragm,

the shell comprises a front cover, a middle shell and a lower shell which are distributed along the vibration direction of the vibration system and are sequentially connected;

the vibrating diaphragm is injected into the middle shell or is formed by adopting a solid rubber material through a hot pressing process and is combined on the surface of the middle shell;

the edge magnetic conduction plate and the lower shell are integrally formed by injection molding.

2. The speaker of claim 1, further comprising a conductive member for conducting internal and external circuits of the speaker, the conductive member being integrally injection-molded with the lower case.

3. The loudspeaker of claim 2, wherein the vibration system further comprises a voice coil fixed to one side of the diaphragm, and the conductive member is in electrical communication with a lead of the voice coil.

4. The loudspeaker of claim 2, wherein the vibration system further comprises a damper and a voice coil, one end of the voice coil is connected to the diaphragm, the other end of the voice coil is connected to the damper, and the damper is connected to the lower case and is in conduction with the conductive member.

5. The speaker of claim 2, wherein the lower case has a plurality of side walls distributed along a circumferential direction thereof, adjacent two of the side walls are disposed at an included angle to form a corner portion, and the conductive member is disposed at the corner portion.

6. A loudspeaker according to claim 5, wherein the wall thickness of the corner portion is greater than the wall thickness of the side wall.

7. The speaker as claimed in any one of claims 2 to 6, wherein the auxiliary system further comprises a yoke fixed to a side of the lower case facing away from the diaphragm, and the conductive member includes at least two pad portions surrounding a periphery of the yoke and exposed to a bottom surface of the lower case.

8. The loudspeaker according to claim 1, wherein the long side of the side magnetic conductive plate is provided with a limiting notch, and the lower case is provided with a limiting protrusion adapted to the limiting notch.

9. The loudspeaker of claim 1, wherein an annular protrusion is provided on an inner wall surface of the middle shell, and the diaphragm includes an edge portion connected to the inner wall surface of the middle shell, and an annular groove adapted to the annular protrusion is formed on the edge portion.

10. The speaker of claim 1, wherein one of the front cover and the lower case is fixed to the middle case by laser welding, and the other is fixed to the middle case by adhesion.

11. The loudspeaker of claim 1, wherein the diaphragm is injection-molded by using a liquid silicon rubber material and is bonded to the surface of the middle shell; alternatively, the first and second electrodes may be,

the diaphragm is made of one of solid silicon rubber, AEM rubber or ACM rubber through hot pressing and is combined with the surface of the middle shell.

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