WO2020181887A1

WO2020181887A1 - Loudspeaker

Info

Publication number: WO2020181887A1
Application number: PCT/CN2019/129716
Authority: WO
Inventors: 李军
Original assignee: 歌尔股份有限公司
Priority date: 2019-03-08
Filing date: 2019-12-30
Publication date: 2020-09-17
Also published as: CN109769183B; CN109769183A

Abstract

The present invention discloses a loudspeaker, comprising a housing, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are kept in the housing, the vibration system comprises a vibrating diaphragm group and a voice coil group for driving the vibrating diaphragm group to vibrate, wherein the vibrating diaphragm group comprises a main vibrating diaphragm and an auxiliary vibrating diaphragm, the voice coil group comprises a first voice coil and a second voice coil, wherein the first voice coil is arranged between the main vibrating diaphragm and the auxiliary vibrating diaphragm, and the second voice coil is arranged on one side, deviating from the main vibrating diaphragm, of the auxiliary vibrating diaphragm. The loudspeaker of the present invention comprises the first voice coil and the second voice coil, equivalent to disassembling a single voice coil structure into a double voice coil structure, and the auxiliary vibrating diaphragm is not arranged on the lower end of the second voice coil, instead, between the first voice coil and the second voice coil, so that the installation position of the auxiliary vibrating diaphragm is lifted, the vibrating space of the auxiliary vibrating diaphragm is increased, and the large amplitude vibration requirement of the auxiliary vibrating diaphragm is met.

Description

speaker

Technical field

The invention relates to the technical field of acoustic devices, in particular to a loudspeaker.

Background technique

With the development of mobile phone technology, higher requirements are placed on speakers, products are getting thinner, the amplitude is getting bigger and bigger, and the vibration space is getting smaller and smaller. When the product amplitude is large, the polarization problem of the vibration system will be aggravated. At present, the dual diaphragm system of the main diaphragm and the auxiliary diaphragm is used in the industry to suppress the polarization. However, the traditional dual diaphragm system generally adopts a single voice coil structure. The diaphragm is attached to the upper end of the voice coil, and the auxiliary diaphragm is attached to the lower end of the voice coil. Due to the high height of the single voice coil, the auxiliary diaphragm is greatly restricted by space, and the folding ring height of the auxiliary diaphragm is small. To meet the needs of large-amplitude vibration, and to avoid beating the pot frame when the folding ring of the auxiliary diaphragm vibrates downwards, it is necessary to add a groove structure on the upper surface of the pot frame to avoid it, which increases the process cost and corresponds to the pot frame. The thinning of the folded ring part of the auxiliary diaphragm will cause the BL value to decrease and the sensitivity to decrease, which is not conducive to the improvement of product performance.

Summary of the invention

The main purpose of the present invention is to provide a loudspeaker, which aims to solve the problem that the loudspeaker in the prior art cannot meet the demand for large-amplitude vibration of the auxiliary diaphragm.

In order to achieve the above objective, the present invention provides a loudspeaker including a housing, a vibration system and a magnetic circuit system housed in the housing, the vibration system including a diaphragm group and a voice coil group that drives the diaphragm group to vibrate, The diaphragm group includes a main diaphragm and an auxiliary diaphragm, the voice coil group includes a first voice coil and a second voice coil, and the first voice coil is disposed between the main diaphragm and the auxiliary diaphragm. In between, the second voice coil is arranged on a side of the auxiliary diaphragm facing away from the main diaphragm.

Preferably, the auxiliary diaphragm includes a first horizontal portion, a first folding ring portion, and a first fixing portion sequentially arranged from the inside to the outside, and the first horizontal portion is fixed between the first voice coil and the second voice coil , The first fixing part is fixed on the housing.

Preferably, the main diaphragm includes a central portion, a second folding ring portion, and a second fixing portion sequentially arranged from the inside to the outside. The second fixing portion is fixed on the housing, and the first voice coil faces the One end of the main diaphragm is attached to the central portion, one end of the first voice coil facing the auxiliary diaphragm is attached to the first horizontal portion, and the second voice coil facing the auxiliary diaphragm One end is attached to the first horizontal part.

Preferably, the first folding ring portion protrudes in a direction away from the first voice coil, and the second folding ring portion protrudes in a direction away from or toward the first voice coil.

Preferably, the vibration system further includes a centering support piece, the centering support piece is arranged between the first voice coil and the auxiliary diaphragm, the centering support piece includes a base and is arranged on the base One end of the conductive circuit is electrically connected to the first voice coil and the second voice coil, and the other end of the conductive circuit is electrically connected to an external circuit.

Preferably, the first voice coil and the second voice coil are connected in series through the conductive circuit.

Preferably, the centering piece includes a piece horizontal portion, a piece fixing portion, and a connecting portion connecting the piece horizontal portion and the piece fixing portion, and the piece fixing portion is fixed on the housing, so The horizontal portion of the support piece is fixed between the first voice coil and the auxiliary diaphragm.

Preferably, the number of the auxiliary diaphragm and the number of the centering support pieces are both two, and the two auxiliary diaphragms and the two centering support pieces are arranged in a one-to-one correspondence.

Preferably, the first voice coil is formed by winding a first voice coil wire; the second voice coil is formed by winding a second voice coil wire, and the wire diameter of the first voice coil wire is The wire diameter of the voice coil wire is different.

Preferably, the magnetic circuit system includes a basin frame fixed to the housing, a central magnet installed on the basin frame, and side magnets distributed outside the central magnet, and a magnetic gap is formed between the central magnet and the side magnets , The first voice coil and the second voice coil are both suspended in the magnetic gap.

In the technical solution of the present invention, the speaker includes a first voice coil and a second voice coil, which is equivalent to disassembling the single voice coil structure into a double voice coil structure, and the auxiliary diaphragm is no longer arranged at the lower end of the second voice coil. Instead, the auxiliary diaphragm is arranged between the first voice coil and the second voice coil, which increases the installation position of the auxiliary diaphragm, increases the vibration space of the auxiliary diaphragm, and meets the demand for large-amplitude vibration of the auxiliary diaphragm.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings may be obtained based on the structure shown in these drawings.

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

Figure 2 is a schematic cross-sectional view of a loudspeaker according to an embodiment of the invention;

3 is a schematic cross-sectional view of the vibration system and the basin frame of the speaker in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a centering support piece in a speaker according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of assembling the centering support piece and the first voice coil and the second voice coil in the speaker according to an embodiment of the present invention.

Description with icon number:

标号Label	名称 name	标号Label		名称name
100100	扬声器 speaker	25112511	支片水平部 Horizontal part
1010	外壳 shell	25122512	连接部 Connection part
2020	振动系统 Vibration system	25132513	支片固定部Fixed part
21twenty one	主振膜 Main diaphragm	252252	第一焊盘 First pad
211211	中央部 Central part	253253	第二焊盘 Second pad
212212	第二折环部 Second fold	254254	第三焊盘 Third pad
213213	第二固定部Second fixed part	255255	第四焊盘Fourth pad
22twenty two	辅助振膜 Auxiliary diaphragm	2626	补强部 Reinforcement Department
221221	第一水平部 First level	3030	磁路系统 Magnetic circuit system
222222	第一折环部 First fold	3131	盆架Basin stand
223223	第一固定部First fixed part	3232	中心磁铁Center magnet
23twenty three	第一音圈 First voice coil	3333	边磁铁Side magnet
24twenty four	第二音圈 Second voice coil	3434	中心华司 Center Washer
2525	定心支片 Centering piece	4040	前盖The front cover
251251	基体 Matrix	401401	出声孔Sound hole

The realization of the objectives, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and 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 in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as instructions or implications Its relative importance or implicitly indicates the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

The present invention provides a speaker.

As shown in FIGS. 1 to 3, in this embodiment, the speaker 100 includes a housing 10, a vibration system 20 and a magnetic circuit system 30, and the vibration system 20 and the magnetic circuit system 30 are housed in the housing 10. Among them, the vibration system 20 includes a diaphragm group and a voice coil group that drives the diaphragm group to vibrate. The diaphragm group includes a main diaphragm 21 and an auxiliary diaphragm 22. The voice coil group includes a first voice coil 23 and a second voice coil 24. The first voice coil 23 is arranged between the main diaphragm 21 and the auxiliary diaphragm 22, and the second voice coil 24 is arranged on the side of the auxiliary diaphragm 22 away from the main diaphragm 21.

Specifically, as shown in FIGS. 2 and 3, the main diaphragm 21, the first voice coil 23, the auxiliary diaphragm 22, and the second voice coil 24 of this embodiment are arranged from top to bottom, and the first voice coil 23 The upper end is attached to the lower surface of the main diaphragm 21, the lower end of the first voice coil 23 is attached to the upper surface of the auxiliary diaphragm 22, and the upper end of the second voice coil 24 is attached to the lower surface of the auxiliary diaphragm 22. The speaker 100 of this embodiment includes a first voice coil 23 and a second voice coil 24, which is equivalent to disassembling a single voice coil structure into a double voice coil structure, and the auxiliary diaphragm 22 is no longer arranged at the lower end of the second voice coil 24 Instead, the auxiliary diaphragm 22 is arranged between the first voice coil 23 and the second voice coil 24, so that the installation position of the auxiliary diaphragm 22 is raised, and the vibration space of the auxiliary diaphragm 22 is increased to meet the requirements of the auxiliary diaphragm 22. 22 large amplitude vibration requirements.

The auxiliary diaphragm 22 of this embodiment includes a first horizontal portion 221, a first folding ring portion 222, and a first fixing portion 223 which are sequentially arranged from the inside to the outside, wherein the first horizontal portion 221 is fixed on the first voice coil 23 and the second Between the two voice coils 24, the first fixing portion 223 is fixed on the housing 10 to fix both sides of the auxiliary diaphragm 22 to facilitate the vibration of the first folding ring portion 222. Compared with the speaker 100 with a single voice coil structure, the speaker 100 of the present embodiment has a higher installation position of the auxiliary diaphragm 22, which limits the vibration space of the first folding ring portion 222 less, that is, the first folding ring portion 222 has Sufficient vibration space can increase the height of the first folding ring portion 222, which is beneficial to improve the acoustic performance of the speaker 100.

The main diaphragm 21 of this embodiment includes a central portion 211, a second folding ring portion 212, and a second fixing portion 213 arranged in order from the inside to the outside. The second fixing portion 213 is fixed on the housing 10, and the first voice coil 23 faces the main One end of the diaphragm 21 is attached to the central portion 211, the end of the first voice coil 23 facing the auxiliary diaphragm 22 is attached to the first horizontal portion 221, and the end of the second voice coil 24 facing the auxiliary diaphragm 22 is attached to the first horizontal portion 221. Horizontal part 221.

Specifically, the central portion 211 of the main diaphragm 21 is covered on the upper end of the first voice coil 23, the lower end of the first voice coil 23 is attached to the upper surface of the first horizontal portion 221 of the auxiliary diaphragm 22, and the second voice coil 24 The upper end is attached to the lower surface of the auxiliary diaphragm 22 to make the voice coil group drive the diaphragm group to vibrate, that is, the first voice coil 23 and the second voice coil 24 jointly drive the main diaphragm 21 and the auxiliary module to vibrate at the same time. The design is reasonable.

In this embodiment, the first folding ring portion 222 protrudes away from the first voice coil 23, and the second folding ring portion 212 protrudes away from or toward the first voice coil 23, that is, the first folding ring The arc-shaped convex side of the portion 222 faces upward, and the arc-shaped convex side of the second folding ring portion 212 faces downward or upward. The first folding ring portion 222 and the second folding ring portion 212 can form a symmetrical support, and can provide a symmetrical restoring force when the voice coil assembly vibrates, reducing product distortion and improving reliability.

In this embodiment, the vibration system 20 further includes a centering support plate 25. The centering support plate 25 is disposed between the first voice coil 23 and the auxiliary diaphragm 22. The centering support plate 25 includes a base body 251 and is disposed on the base body 251. One end of the conductive circuit is electrically connected to the first voice coil 23 and the second voice coil 24, and the other end of the conductive circuit is electrically connected to the external circuit. Specifically, the other end of the conductive circuit can be connected to the terminal For example, a mobile phone is electrically connected to energize the first voice coil 23 and the second voice coil 24. The arrangement of the centering support piece 25 plays a role in positioning, which can ensure that the first voice coil 23 and the second voice coil 24 reciprocate in the axial direction, and suppress the polarization problem of the first voice coil 23 and the second voice coil 24. In addition, the centering support piece 25 is arranged between the first voice coil 23 and the auxiliary diaphragm 22, which can suppress the polarization problem while ensuring the vibration space of the auxiliary diaphragm 22, and meet the requirements of the auxiliary diaphragm 22 for large amplitude vibration.

In this embodiment, the first voice coil 23 and the second voice coil 24 are connected in series through a conductive circuit, which facilitates the synchronous up and down movement of the first voice coil 23 and the second voice coil 24, and ensures that the main diaphragm 21 and the auxiliary diaphragm 22 vibrate. Synchronization.

Specifically, the base 251 of this embodiment includes a branch horizontal portion 2511, a branch fixing portion 2513, and a connecting portion 2512 connecting the branch horizontal portion 2511 and the branch fixing portion 2513. The branch fixing portion 2513 is fixed on the housing 10. The horizontal part 2511 of the support piece is fixed between the first voice coil 23 and the auxiliary diaphragm 22 to fix the two sides of the centering support piece 25. The centering support piece 25 is elastic and can follow the voice coil group and the diaphragm group. Axial reciprocating movement and movement, reasonable structure design, simple and convenient.

In this embodiment, the number of auxiliary diaphragms 22 and the number of centering fins 25 are both two, and the two auxiliary diaphragms 22 and the two centering fins 25 are arranged in one-to-one correspondence. The two auxiliary diaphragms 22 are arranged symmetrically, and the two auxiliary diaphragms 22 vibrate synchronously to maintain the sound balance of the speaker 100. The two centering supports 25 are also arranged symmetrically, and the two qualitative supports and the two auxiliary vibrations The films 22 are arranged in one-to-one correspondence, further suppressing the polarization problem of the first voice coil 23 and the second voice coil 24.

Specifically, as shown in FIGS. 4 and 5, the conductive circuit of each centering support piece 25 includes two pads, and the two pads of one centering support piece 25 are the first pad 252 and the second pad. Disk 253, the two pads of the other centering support piece 25 are the third pad 254 and the fourth pad 255 respectively, wherein the first pad 252 and the second pad 253 are conductive, and the third pad 254 The fourth pad 255 is not conductive. In order to realize the series connection of the first voice coil 23 and the second voice coil 24, the current of the first voice coil 23 and the second voice coil 24 are the same. In one embodiment, the third pad 254 and the first voice coil 23 The start line is connected, the first pad 252 is connected to the end line of the first voice coil 23, the second pad 253 is connected to the start line of the second voice coil 24, and the fourth pad 255 is connected to the second voice coil 24. In another embodiment, the third pad 254 is connected to the start line of the second voice coil 24, and the first pad 252 is connected to the end line of the second voice coil 24. The second pad 253 is connected to the start line of the first voice coil 23, and the fourth pad 255 is connected to the end line of the first voice coil 23; in another embodiment, the third pad 254 is connected to the first voice coil 23. The start line of the coil 23 is connected, the second pad 253 is connected to the end line of the first voice coil 23, the first pad 252 is connected to the start line of the second voice coil 24, and the fourth pad 255 is connected to the first The end wire of the voice coil 23 is conductive; in other embodiments, other connection methods can also be used, and it is necessary to ensure that the first voice coil 23 and the second voice coil 24 are connected in series, and the first voice coil 23 and the second voice coil 24 are connected in series. The current is the same.

The first voice coil 23 in this embodiment is formed by winding the first voice coil 23 wire; the second voice coil 24 is formed by winding the second voice coil 24 wire, and the diameter of the first voice coil 23 wire is the same as the first voice coil 23 wire. The wire diameters of the voice coil 23 are different, and the height, resistance and weight of the first voice coil 23 and the second voice coil 24 can be freely matched to meet different usage requirements.

As shown in Figures 1 to 3, in this embodiment, the magnetic circuit system 30 includes a basin frame 31 fixed to the housing 10, a central magnet 32 mounted on the basin frame 31, and side magnets 33 distributed outside the central magnet 32. A magnetic gap is formed between the central magnet 32 and the variable magnet, and the first voice coil 23 and the second voice coil 24 are both suspended in the magnetic gap. The magnetic gap of the magnetic circuit system 30 generates a magnetic field. The first voice coil 23 and the second voice coil 24 reciprocate and cut the magnetic field lines in the magnetic gap to drive the main diaphragm 21 and the auxiliary diaphragm 22 to vibrate, thereby inspiring the air to sound and complete the electric Energy conversion between sounds. In order to correct the magnetic force emitted by the central magnet 32, the magnetic circuit system 30 of this embodiment further includes a central washer 34 arranged on the central magnet 32.

In addition, since the first folding ring portion 222 of the auxiliary diaphragm 22 has sufficient vibration space, there is no need to add a groove structure on the upper surface of the basin frame 31, that is, the first folding ring on the basin frame 31 corresponding to the auxiliary diaphragm 22 The position of the part 222 will not be thinned, which improves the sensitivity and improves the product performance.

The vibration system 20 of the loudspeaker 100 of this embodiment further includes a reinforcing part 26 which is arranged at the upper end of the first voice coil 23 to adjust the acoustic performance of the loudspeaker 100. The speaker 100 of this embodiment further includes a front cover 40, which cooperates with the housing 10 to form a protective frame, and the front cover 40 is provided with a sound outlet 401 through which sound is emitted.

The above are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the description and drawings of the present invention, or directly/indirectly applied to other Related technical fields are included in the scope of patent protection of the present invention.

Claims

A loudspeaker comprising a housing, a vibration system and a magnetic circuit system housed in the housing, wherein the vibration system includes a diaphragm group and a voice coil group that drives the diaphragm group to vibrate. The diaphragm The group includes a main diaphragm and an auxiliary diaphragm. The voice coil group includes a first voice coil and a second voice coil. The first voice coil is arranged between the main diaphragm and the auxiliary diaphragm. The second voice coil is arranged on the side of the auxiliary diaphragm away from the main diaphragm.
The speaker according to claim 1, wherein the auxiliary diaphragm comprises a first horizontal portion, a first folding ring portion and a first fixing portion arranged in order from the inside to the outside, and the first horizontal portion is fixed on the first Between a voice coil and a second voice coil, the first fixing portion is fixed on the housing.
The speaker according to claim 2, wherein the main diaphragm includes a central portion, a second folding ring portion and a second fixing portion arranged in order from the inside to the outside, and the second fixing portion is fixed to the housing In the above, the end of the first voice coil facing the main diaphragm is attached to the central portion, and the end of the first voice coil facing the auxiliary diaphragm is attached to the first horizontal portion, the The end of the second voice coil facing the auxiliary diaphragm is attached to the first horizontal portion.
The loudspeaker of claim 3, wherein the first folded ring portion protrudes in a direction away from the first voice coil, and the second folded ring portion is away from or toward the first voice coil. The direction bulges.
The loudspeaker according to claim 1, wherein the vibration system further comprises a centering support plate, the centering support plate is arranged between the first voice coil and the auxiliary diaphragm, and the fixed The core support piece includes a base and a conductive circuit arranged on the base. One end of the conductive circuit is electrically connected with the first voice coil and the second voice coil, and the other end of the conductive circuit is electrically connected with an external circuit.
The speaker of claim 5, wherein the first voice coil and the second voice coil are connected in series through the conductive circuit.
The loudspeaker according to claim 5, wherein the base includes a supporting piece horizontal portion, a supporting piece fixing portion, and a connecting portion connecting the supporting piece horizontal portion and the supporting piece fixing portion, and the supporting piece fixing portion is fixed On the housing, the horizontal portion of the support piece is fixed between the first voice coil and the auxiliary diaphragm.
The loudspeaker according to claim 5, wherein the number of the auxiliary diaphragm and the number of the centering support pieces are both two, and the two auxiliary diaphragms and the two centering support pieces One-to-one arrangement.
The loudspeaker according to any one of claims 1-8, wherein the first voice coil is wound by a first voice coil wire; the second voice coil is wound by a second voice coil wire As a result, the wire diameter of the first voice coil wire is different from the wire diameter of the first voice coil wire.
The speaker according to any one of claims 1-8, wherein the magnetic circuit system includes a basin frame fixed to the housing, a central magnet installed on the basin frame, and edges distributed outside the central magnet A magnet, a magnetic gap is formed between the center magnet and the side magnets, and the first voice coil and the second voice coil are both suspended in the magnetic gap.