CN111711895A

CN111711895A - Loudspeaker

Info

Publication number: CN111711895A
Application number: CN202010834834.8A
Authority: CN
Inventors: 冯乐喜; 孙立国
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2020-09-25
Anticipated expiration: 2040-08-19
Also published as: CN111711895B

Abstract

The invention provides a loudspeaker, which comprises a shell, a magnetic circuit system and a vibration system. The magnetic circuit system is arranged on the shell and forms a magnetic gap; the vibration system comprises a voice coil and a centering support sheet, and the voice coil extends into the magnetic gap; the centering support piece comprises a first fixing part, a second fixing part and a vibrating arm, the first fixing part is installed on the shell, the second fixing part is connected with the voice coil, the two ends of the vibrating arm are respectively connected with the first fixing part and the second fixing part, the vibrating arm is connected with the first fixing part through a bending structure, the bending structure comprises a bending section, a first end connected with the first fixing part and a second end connected with the vibrating arm, and the bending structure is fixedly connected with the shell. The technical scheme of the invention is beneficial to increasing the length of the vibrating arm, thereby reducing the local stress of the vibrating arm, improving the fatigue resistance of the centering disk and further avoiding the cracking or breaking of the centering disk.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a loudspeaker.

Background

A speaker is an important acoustic component of electronic equipment, and is an energy conversion device capable of performing conversion between an electric signal and a sound signal, and belongs to the most basic sound production unit. With the gradual miniaturization of electronic devices, the miniaturization of the matched speakers is also promoted, and higher requirements on the structure and sound quality of the speakers are also made.

In the working process of the micro-speaker, along with the increase of working voltage or amplitude, the voice coil of the micro-speaker gradually becomes unstable, and the micro-speaker easily reaches a swing mode in the vibration process. Therefore, a centering support is introduced into the loudspeaker, the centering support is fixedly connected with the shell, and then the voice coil is connected with the centering support, so that the vibration of the voice coil in the vertical direction is relatively free, and the swinging mode in the horizontal direction is restrained to a certain extent.

In the prior art, a certain gap needs to be reserved between the vibrating arm of the centering branch piece and the shell or the magnetic circuit, so that the vibrating arm is short, the local stress is overlarge, the fatigue strength is poor, and the centering branch piece is easy to crack or break.

Disclosure of Invention

The main object of the present invention is to propose a loudspeaker, aiming to solve at least one of the above technical problems.

To achieve the above object, the present invention provides a speaker, including:

a housing;

a magnetic circuit system mounted to the case, the magnetic circuit system forming a magnetic gap; and the number of the first and second groups,

the vibration system comprises a voice coil and a centering support piece, and the voice coil extends into the magnetic gap; wherein the content of the first and second substances,

the centering support piece comprises a first fixing part, a second fixing part and a vibrating arm, the first fixing part is installed on the shell, the second fixing part is connected with the voice coil, two ends of the vibrating arm are respectively connected with the first fixing part and the second fixing part, the vibrating arm is connected with the first fixing part through a bending structure, the bending structure comprises a bending section, a first end connected with the first fixing part and a second end connected with the vibrating arm, and the bending structure is fixedly connected with the shell.

Optionally, the housing has a housing body and a fixed connecting portion, the housing body encloses a housing space for housing and fixing the vibration system and the magnetic circuit system, and the fixed connecting portion is arranged on a surface of the housing body facing the magnetic circuit system; the bending structure and the fixed connecting part form fixed connection.

Optionally, the fixed connection portion includes a combination portion and an extension portion, the combination portion is located on a surface of the case body facing the magnetic circuit system, the extension portion protrudes laterally from an inner side wall of the case body, the first end is fixedly disposed in the combination portion, the second end is fixedly disposed in the extension portion, and the bending portion extends from the combination portion to the extension portion;

the vibration arm extends along the circumferential direction of the shell body and is spaced from the inner side wall of the shell body.

Optionally, the bending structure and the fixing connection part are fixed by bonding or hot melting.

Optionally, the bending structure and the fixed connecting part are fixed by injection molding.

Optionally, the length ratio of the fixed connecting part to the side edge of the shell body where the fixed connecting part is located ranges from 10% to 20%.

Optionally, two opposite sides of the fixed connection portion are respectively provided with one centering branch piece, and the two centering branch pieces and the fixed connection portion are integrally molded.

Optionally, the shell body includes relative first side and the second side that sets up, first side with the second side all is equipped with fixed connection portion, first side is equipped with two the centering branch piece, the second side is equipped with two the centering branch piece.

Optionally, the magnetic circuit system comprises a central magnet and a plurality of side magnets surrounding the central magnet, and the magnetic gaps are formed between the central magnet and the plurality of side magnets;

the plurality of edge magnets comprise two first edge magnets which are respectively arranged on the first edge and the second edge, an interval space is formed between the shell body and the first edge magnets, and the vibration arm is partially positioned in the interval space.

Optionally, the fixed connection portion abuts against a side surface of the first side magnet.

In the technical scheme of the invention, the centering support sheet comprises a first fixing part, a second fixing part and a vibrating arm, wherein two ends of the vibrating arm are respectively connected with the first fixing part and the second fixing part; in addition, because the arm that shakes and shell snap-on for the arm that shakes is difficult to rotate or the translation, and the accurate control arm position that shakes of more ability further optimizes the tone quality of speaker.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 diagram of an external structure of a speaker according to an embodiment of the present invention;

fig. 2 is an exploded view of the loudspeaker of fig. 1;

fig. 3 is a schematic view of the internal structure of the loudspeaker shown in fig. 1;

fig. 4 is a schematic structural view of a damper in the loudspeaker of fig. 1;

fig. 5 is another internal structural view of the speaker shown in fig. 1;

fig. 6 is a schematic structural diagram of a housing and a metal member in the loudspeaker shown in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Outer casing	110	Shell body
120	Fixed connecting part	121	Joining part
				122	Extension part	200	Magnetic circuit system
210	Center magnet	220	Edge magnet
				230	Central washer	240	Metal part
241	Side washer	300	Vibration system
				310	Voice coil	320	Centering support plate
330	Main vibrating diaphragm	340	Reinforcing part
				350	Auxiliary vibrating diaphragm	321	First fixed part
3211	Module pad part	322	Vibration arm
				323	Second fixed part	3231	Voice coil bonding part
3232	Voice coil pad part	324	Bending structure

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment 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 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 the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The embodiment of the present invention provides a speaker, and the speaker according to the embodiment of the present invention will be specifically described with reference to fig. 1 to 6.

In an embodiment of the present invention, the speaker includes:

a housing 100;

a magnetic circuit 200, the magnetic circuit 200 being mounted to the housing 100, the magnetic circuit 200 forming a magnetic gap; and the number of the first and second groups,

a vibration system 300 comprising a voice coil 310 and a centering leg 320, said voice coil 310 extending into said magnetic gap; wherein the content of the first and second substances,

the centering branch piece 320 comprises a first fixing portion 321, a second fixing portion 323 and a vibrating arm 322, the first fixing portion 321 is installed on the shell 100, the second fixing portion 323 is connected with the voice coil 310, two ends of the vibrating arm 322 are respectively connected with the first fixing portion 321 and the second fixing portion 323, the vibrating arm 322 is connected with the first fixing portion 321 through a bending structure 324, the bending structure 324 comprises a bending section, a first end connected with the first fixing portion 321 and a second end connected with the vibrating arm 322, and the bending structure 324 is fixedly connected with the shell 100.

In this embodiment, as shown in fig. 1 and fig. 2, the vibration system 300 further includes a main diaphragm 330, the case 100 has a first surface facing the magnetic circuit system 200 and a second surface opposite to the first surface, the centering chip 320 is mounted on the first surface of the case 100, and the main diaphragm 330 is mounted on the second surface of the case 100. When the second surface of the casing 100 faces upward and the first surface faces downward, the upper surface of the voice coil 310 is connected to the lower surface of the main diaphragm 330, i.e., the voice coil 310 is suspended below the main diaphragm 330. It can be understood that the magnetic circuit system 200 is used to provide a fixed magnetic field, and when a current is applied to the voice coil 310, an alternating magnetic field interacting (attracting or repelling) with the fixed magnetic field is generated, so that the voice coil 310 moves under the action of the magnetic field and drives the main diaphragm 330 to vibrate, thereby implementing the sound generating function of the speaker.

During operation of the speaker, the voice coil 310 may become unstable gradually as the operating voltage or amplitude increases, and may easily reach a rocking mode during vibration. Therefore, the damper 320 is introduced into the speaker, the damper 320 is fixedly connected to the housing 100, and then the voice coil 310 is connected to the damper 320, so that the vertical vibration of the voice coil 310 is relatively free, and the horizontal vibration mode is suppressed.

In the technical scheme of the invention, the centering branch piece 320 comprises a first fixing part 321, a second fixing part 323 and a vibrating arm 322, two ends of the vibrating arm 322 are respectively connected with the first fixing part 321 and the second fixing part 323, the vibrating arm 322 is connected with the first fixing part 321 through a bending structure 324, and the bending structure 324 is fixedly connected with the shell 100, so that no gap needs to be reserved between the vibrating arm 322 and the shell 100 and between the vibrating arm 322 and the magnetic circuit in the extension direction, the length of the vibrating arm 322 is favorably increased, the local stress of the vibrating arm 322 is reduced, the fatigue resistance of the centering branch piece 320 is improved, and the centering branch piece 320 is prevented from cracking or breaking; in addition, because the vibrating arm 322 is directly fixed with the housing 100, the vibrating arm 322 is not easy to rotate or translate, the position of the vibrating arm 322 can be accurately controlled, and the tone quality of the loudspeaker is further optimized.

Further, as shown in fig. 2 and 3, the housing 100 has a housing body 110 and a fixed connection portion 120, the housing body 110 encloses a receiving space for receiving the fixed vibration system 300 and the magnetic circuit system 200, the fixed connection portion 120 is protruded from a surface of the housing body 110 facing the magnetic circuit system 200, and the bent structure 324 is fixedly connected to the fixed connection portion 120. In this embodiment, the fixing connection portion 120 protruding outward is disposed on the housing body 110, so that on one hand, the vibrating arm 322 and the first fixing portion 321 can be conveniently embedded into the fixing connection portion 120, and thus the vibrating arm 322, the first fixing portion 321 and the housing 100 can be conveniently and fixedly connected; on the other hand, the fixing connection portion 120 can abut and fix the edge magnet 220 in the magnetic circuit system 200, which will be described in detail below.

Specifically, referring to fig. 6, the fixing connection portion 120 includes a combination portion 121 and an extension portion 122, the combination portion 121 is located on a surface of the case body 110 facing the magnetic circuit system 200, the extension portion 122 protrudes out of an inner side wall of the case body 110, a first end of the bending structure 324 is fixedly disposed in the combination portion 121, a second end of the bending structure 324 is fixedly disposed in the extension portion 122, and a bending section of the bending structure 324 extends from the combination portion 121 to the extension portion 122. In the technical scheme of this embodiment, the fixing connection portion 120 extends toward the inner side of the housing body 110, so that the vibrating arm 322 of the centering branch piece 320 is embedded in the fixing connection portion 120, and thus, on one hand, the length of the vibrating arm 322 can be extended, thereby reducing the local stress of the vibrating arm 322 and improving the fatigue resistance of the centering branch piece 320; on the other hand can play fixed action to the arm 322 that shakes, prevents to shake the condition such as the arm 322 takes place upset and translation to control the position of shaking the arm 322 more accurately, ensure that the support of centering branch piece 320 horizontal direction to voice coil 310 is favorable to further optimizing the tone quality of speaker.

Further, as shown in fig. 3 and 4, the vibrating arms 322 extend in the circumferential direction of the case body 110 and are spaced apart from the inner sidewall of the case body 110. Particularly, the arm 322 shakes has a plurality of extension sections and kinks, connects through the kinks between two adjacent extension sections to the extension section is the arc setting, so, is favorable to make full use of space, further increases the length of arm 322 shakes, promotes the fatigue resistance of centering branch piece 320.

In one embodiment, the bending structure 324 is bonded or heat-fused to the fixing connection portion 120. In the technical scheme of the embodiment, the bending structure 324 of the centering branch piece 320 is fixedly connected with the fixed connecting part 120 of the shell 100, and no gap needs to be reserved between the vibrating arm 320 and the shell 100 and between the vibrating arm 320 and the magnetic circuit system 200 in the extending direction, so that the length of the vibrating arm 322 is increased, the local stress of the vibrating arm 322 is reduced, the fatigue resistance of the centering branch piece 320 is improved, and the cracking or breaking of the centering branch piece 320 is avoided; in addition, the fixing method of adhesive fixing or hot-melt fixing between the bending structure 324 and the fixing connection portion 120 is simple, convenient and fast to operate, and is beneficial to improving the assembly efficiency.

In another embodiment, the bending structure 324 is fixed to the fixing connection portion 120 by injection molding. This embodiment technical scheme moulds plastics through the structure 324 of buckling with centering branch piece 320 and the fixed connection portion 120 an organic whole of shell 100, and the glue breaking that appears easily when can avoiding glue to bond, empty drum and the poor scheduling problem of rubber coating state effectively guarantee the close coupling between centering branch piece 320 and the shell 100 to promote the reliability of speaker inner structure, and optimize the tone quality of speaker.

Optionally, in the scheme that the bending structure 324 and the fixing connection portion 120 are fixed by injection molding, the length ratio of the portion of the vibrating arm 322 embedded in the fixing connection portion 120 to the whole vibrating arm 322 ranges from 5% to 25%. In this embodiment, the vibrating arm 322 includes a free vibrating arm and a fixed vibrating arm embedded in the fixed connection portion 120, wherein the free vibrating arm can freely move along with the voice coil 310, and the longer the free vibrating arm is, the better the local stress of the vibrating arm 322 is reduced, the fatigue resistance of the centering support 320 is improved, but the length of the fixed vibrating arm is also ensured, so as to ensure that the vibrating arm 322 and the fixed connection portion 120 are tightly combined to prevent the vibrating arm 322 from being turned and translated due to overlong. The technical scheme of the embodiment is favorable for ensuring the tight connection between the vibrating arm 322 and the fixed connecting part 120 while improving the overall length of the vibrating arm 322 by controlling the overall proportion range of the fixed vibrating arm and the vibrating arm 322.

Optionally, the length ratio of the fixed connecting part 120 to the side of the shell body 110 where the fixed connecting part is located ranges from 10% to 20%. It will be appreciated that if the attachment portion 120 is too long, the portion of the vibrating arm 322 embedded in the attachment portion 120 is also lengthened accordingly, i.e., the length of the free vibrating arm 3221 is reduced, which is not conducive to reducing the local stress of the vibrating arm 322 and improving the fatigue resistance of the spider 320. If the fixing connection portion 120 is too short, it is not advantageous to ensure that the centering leg 320 is tightly coupled to the case body 110.

In this embodiment, as shown in fig. 3, two opposite sides of the fixing connection portion 120 are respectively provided with a centering branch piece 320, and the two centering branch pieces 320 are integrally molded with the fixing connection portion 120, that is, the two centering branch pieces 320 located on the same side edge of the housing 100 are embedded in the same fixing connection portion 120, wherein the fixing connection portion 120 is located in the middle of the side edge of the housing body 110. According to the technical scheme of the embodiment, the two centering branch pieces 320 can be fixed by adopting the same fixing connection part 120, and the reduction of the occupied space of the fixing connection part 120 is facilitated.

Specifically, the shell body 110 includes a first side and a second side that are arranged relatively, the first side and the second side are both provided with the fixing connection portion 120, the first side is provided with two centering branch pieces 320, and the second side is provided with two centering branch pieces 320. That is, two of the centering branches 320 on the first side share one of the fixing-connecting portions 120, and two of the centering branches 320 on the second side share the other fixing-connecting portion 120. Of course, the housing body 110 further includes two opposite sides, and the fixed connection portion 120 is not disposed on either side.

Specifically, as shown in fig. 2 and 6, the magnetic circuit system 200 includes a center magnet 210 and a plurality of side magnets 220 surrounding the center magnet 210, the center magnet 210 and the plurality of side magnets 220 form the magnetic gap therebetween, the plurality of side magnets 220 include two first side magnets respectively disposed on a first side and a second side of the case body 110, a separation space is formed between the case body 110 and the first side magnets, and a portion of the vibrating arm is located in the separation space. Of course, the shell body 110 further includes a third side and a fourth side that are connected between the first side and the second side and are disposed oppositely, the plurality of side magnets 220 further includes two second side magnets, and the two second side magnets are disposed on the third side and the fourth side of the shell body 110, respectively.

Further, the fixing connection part 120 abuts against a side surface of the side magnet 220 adjacent thereto, so that the internal structure of the speaker is more compact. The magnetic circuit system 200 further includes a central washer 230 and a metal member 240, the central washer 230 is disposed corresponding to the central magnet 210, the metal member 240 is accommodated at the inner peripheral side of the casing 100, the metal member 240 includes a plurality of side washers 241, and the side washers 241 are disposed corresponding to the side magnets 220. In addition, any centering branch piece 320 is located between two adjacent side magnets 220, the centering branch piece 320 and the side magnets 220 are arranged at intervals, and a certain gap needs to be reserved between the centering branch piece 320 and the side magnets 220 and between the centering branch piece 320 and the center magnet 210 to prevent the magnets from interfering with the movement of the centering branch piece 320.

In addition, as shown in fig. 4, the second fixing portion 323 includes a voice coil bonding portion 3231 and a voice coil land portion 3232, the voice coil land portion 3232 is electrically connected to the voice coil 310, and the voice coil bonding portion 3231 is fixedly connected to the voice coil 310. The first fixing portion 321 includes a module pad portion 3211, the module pad portion 3211 is disposed at a corner of the case body 110, and the module pad portion 3211 is configured to electrically connect to an external circuit. It can be understood that the voice coil 310 is electrically connected to an external circuit through the centering support 320 to form a loop, so that a current flows through the voice coil 310 to generate an alternating magnetic field, and the voice coil 310 moves under the action of the magnetic field and drives the main diaphragm 330 to vibrate, thereby implementing the sound generating function of the speaker. In addition, as shown in fig. 2 and fig. 5, the vibration system 300 further includes a reinforcing portion 340 and a plurality of auxiliary diaphragms 350, the reinforcing portion 340 is combined in the center of the main diaphragm 330, the auxiliary diaphragms 350 are disposed on the side of the centering branch 320 opposite to the shell body 110, and the plurality of auxiliary main diaphragms 330 and the plurality of centering branches 320 are disposed in a one-to-one correspondence manner.

The embodiment of the invention also provides electronic equipment, which comprises the loudspeaker. The specific structure of the speaker refers to the above embodiments, and since the electronic device adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A loudspeaker, characterized in that the loudspeaker comprises:

a housing;

2. The loudspeaker according to claim 1, wherein the housing has a housing body enclosing a space for accommodating and fixing the vibration system and the magnetic circuit system, and a fixing connection portion provided on a surface of the housing body facing the magnetic circuit system, the bent structure being fixedly connected to the fixing connection portion.

3. The loudspeaker according to claim 2, wherein the fixed connection portion includes a joint portion and an extension portion, the joint portion is located on a surface of the case body facing the magnetic circuit system, the extension portion protrudes laterally from an inner sidewall of the case body, the first end is fixedly provided to the joint portion, the second end is fixedly provided to the extension portion, and the curved section extends from the joint portion to the extension portion;

4. A loudspeaker according to claim 3, wherein the flexure is adhesively or thermally secured to the attachment portion.

5. A loudspeaker according to claim 3, wherein the flexure is injection moulded to the attachment portion.

6. The loudspeaker of claim 2, wherein the ratio of the length of the fixing connection portion to the side of the housing body is in the range of 10% to 20%.

7. A loudspeaker according to any one of claims 2 to 6, wherein one said centring disk is provided on each of the opposite sides of said attachment portion.

8. The speaker of claim 7, wherein the housing body includes a first side and a second side opposite to each other, the first side and the second side each having the fixing connection portion, the first side having two of the centering fins, and the second side having two of the centering fins.

9. The loudspeaker of claim 8, wherein the magnetic circuit system comprises a center magnet and a plurality of side magnets surrounding the center magnet, the center magnet and the plurality of side magnets forming the magnetic gap therebetween;

10. The loudspeaker of claim 9 wherein said fixed connection abuts a side surface of said first side magnet.