CN113596687B

CN113596687B - Speaker and electronic apparatus

Info

Publication number: CN113596687B
Application number: CN202110996959.5A
Authority: CN
Inventors: 戴腾飞; 王书晓
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-10-28
Anticipated expiration: 2041-08-27
Also published as: CN113596687A

Abstract

The invention discloses a loudspeaker and an electronic device using the same. The loudspeaker comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises an inner magnetic circuit part and an outer magnetic circuit part, the outer magnetic circuit part surrounds the periphery of the inner magnetic circuit part and is enclosed with the inner magnetic circuit part to form a magnetic gap, an accommodating cavity is formed between the outer magnetic circuit part and the inner magnetic circuit part and is communicated with the outside through the magnetic gap; the vibration system comprises a vibration diaphragm and a voice coil, one end of the voice coil extends into the containing cavity through a magnetic gap, the vibration diaphragm is contained in the containing cavity and surrounds the periphery of the voice coil, the inner edge of the vibration diaphragm is connected to the peripheral wall of the voice coil, and the outer edge of the vibration diaphragm is connected to the outer magnetic circuit part; wherein, the cavity wall of the containing cavity in front of the vibrating diaphragm is provided with a sound hole communicated to the outside. According to the technical scheme, the volume of the loudspeaker can be reduced, and meanwhile, the sensitivity of the loudspeaker is improved.

Description

Speaker and electronic apparatus

Technical Field

The present invention relates to the field of acoustic technologies, and in particular, to a speaker and an electronic device using the same.

Background

A speaker, as a common device capable of converting an audio signal into sound, is widely used in various electronic devices (e.g., a smart speaker). At present, the smart sound box is mostly developed towards miniaturization and high sensitivity, which also requires that the speaker should have the characteristics of miniaturization and high sensitivity.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker and electronic equipment applying the loudspeaker, and aims to reduce the volume of the loudspeaker and improve the sensitivity of the loudspeaker.

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

the magnetic circuit system comprises an inner magnetic circuit part and an outer magnetic circuit part, wherein the outer magnetic circuit part surrounds the periphery of the inner magnetic circuit part and is encircled with the inner magnetic circuit part to form a magnetic gap, an accommodating cavity is formed between the outer magnetic circuit part and the inner magnetic circuit part and is communicated with the outside through the magnetic gap; and

the vibration system comprises a vibration diaphragm and a voice coil, one end of the voice coil extends into the accommodating cavity through the magnetic gap, the vibration diaphragm is accommodated in the accommodating cavity and surrounds the periphery of the voice coil, the inner edge of the vibration diaphragm is connected to the peripheral wall of the voice coil, and the outer edge of the vibration diaphragm is connected to the outer magnetic circuit part;

and the cavity wall of the containing cavity, which is positioned in front of the vibrating diaphragm, is provided with a sound hole communicated to the outside.

In an embodiment of the present invention, the inner magnetic path portion includes a magnetic conductive yoke, and the magnetic conductive yoke includes a barrel portion and an extended portion, the extended portion being formed by extending one end of the barrel portion outward;

the outer magnetic circuit part comprises a magnet and a magnetic conductive plate, the magnet is arranged on one side of the extension part, provided with the barrel part, and surrounds the barrel part, and is arranged at intervals with the barrel part so as to enclose to form the accommodating cavity;

the magnetic conduction plate is arranged on one side of the magnet, which is far away from the extension part, covers the containing cavity and is arranged at intervals with the barrel part to form the magnetic gap;

the sound hole is formed in the surface, facing the accommodating cavity, of the magnetic conduction plate; or the sound hole is formed in the surface, facing the accommodating cavity, of the extension portion.

In an embodiment of the present invention, the magnetic conductive plate includes a first annular portion, a second annular portion, and a connecting portion, the first annular portion surrounds the barrel portion and is spaced apart from the barrel portion to form the magnetic gap;

the second annular part surrounds the first annular part and is arranged at intervals with the first annular part to form the sound hole;

the connecting part is arranged between the first annular part and the second annular part and is connected with the first annular part and the second annular part, and the second annular part is arranged on the magnet.

In an embodiment of the present invention, the extension portion includes a ring portion and a fixing portion, the ring portion surrounds the cylindrical portion and is spaced apart from the cylindrical portion to form the sound hole;

the fixing portion is provided between and connects the annular portion and the barrel portion, and the magnet is provided on the annular portion.

In an embodiment of the present invention, the outer magnetic circuit portion further includes a bracket, the bracket is disposed in the accommodating chamber and is disposed in a surrounding manner along a surrounding direction of the magnet, and an outer edge of the diaphragm is connected to the bracket.

In an embodiment of the present invention, the vibration system further includes a centering branch piece, the centering branch piece is accommodated in the accommodating cavity and surrounds the voice coil, the centering branch piece is located behind the vibrating diaphragm, an inner edge of the centering branch piece is connected to the circumferential wall of the voice coil, and an outer edge of the centering branch piece is connected to the outer magnetic circuit portion.

In an embodiment of the present invention, the diaphragm includes a corrugated rim and a diaphragm body, an outer edge of the corrugated rim is connected to the outer magnetic circuit portion, an inner edge of the corrugated rim is connected to the outer edge of the diaphragm body, and the inner edge of the diaphragm body is connected to a peripheral wall of the voice coil;

the folding ring is arranged towards the rear of the vibrating diaphragm in a concave mode, and the vibrating diaphragm body is gradually far away from the sound hole in the direction from the outer edge of the vibrating diaphragm to the center of the vibrating diaphragm.

In an embodiment of the present invention, the vibration system further includes a dust cap, and the dust cap covers an opening at one end of the voice coil, the opening being located outside the accommodating cavity.

In an embodiment of the invention, the loudspeaker further comprises a frame, the frame comprises a wrapping part and a cover part, the wrapping part wraps around the magnetic circuit system and is used for fixing the magnetic circuit system, and the cover part covers one end of the wrapping part and covers the outer side of the dust cap.

In an embodiment of the present invention, the speaker further includes an auxiliary system, the auxiliary system includes a magnetic circuit assembly, an end surface of the magnetic circuit system, on which the sound hole is formed, is formed with a mounting groove, the magnetic circuit assembly is disposed in the mounting groove and spaced from a groove side wall of the mounting groove to form an auxiliary magnetic gap;

the auxiliary system further comprises an auxiliary vibrating diaphragm and an auxiliary voice coil for driving the auxiliary vibrating diaphragm to vibrate, and the auxiliary voice coil is inserted into the auxiliary magnetic gap.

To achieve the above object, the present invention also provides an electronic device including a speaker, the speaker including:

the magnetic circuit system comprises an inner magnetic circuit part and an outer magnetic circuit part, wherein the outer magnetic circuit part surrounds the inner magnetic circuit part and is encircled with the inner magnetic circuit part to form a magnetic gap, an accommodating cavity is formed between the outer magnetic circuit part and the inner magnetic circuit part and is communicated with the outside through the magnetic gap; and

According to the technical scheme, the vibrating diaphragm of the loudspeaker is arranged in the magnetic circuit system, so that the axial height of the loudspeaker is reduced, the size of the loudspeaker is reduced, the loudspeaker is miniaturized, and electronic equipment (such as an intelligent sound box) using the loudspeaker is miniaturized. Meanwhile, for the vibrating diaphragms with the same radiation area, the configuration mode of 'internally arranging' in the magnetic circuit system is adopted, so that the size of the magnetic circuit system is greatly increased, and the magnetic field intensity which can be distributed to the unit radiation area on the vibrating diaphragm is increased, so that the driving force and the control force of the magnetic circuit system on the vibrating diaphragm are effectively enhanced, and the sensitivity and the low-frequency playback effect of the loudspeaker are better. In addition, the magnetic circuit system has a margin for improving the vibration performance of the built-in type vibrating diaphragm, the limitation that a high-performance magnet is required to be adopted is eliminated, and the magnetic circuit system is helped to get rid of the resource limitation of rare earth materials, so that the development of the loudspeaker and the switch of related electronic equipment are not limited and are more flexible, and the cost is lower. In addition, the built-in type vibrating diaphragm has stronger stability, thereby greatly improving the reliability of the loudspeaker; meanwhile, the heat dissipation of the loudspeaker is better, and the rated power is improved.

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 structural diagram of a first embodiment of the loudspeaker according to the present invention;

FIG. 2 is a top view of the magnetic conductive plate of FIG. 1;

FIG. 3 is a schematic diagram of a second embodiment of the speaker of the present invention;

FIG. 4 is a top view of the magnetic yoke of FIG. 3;

fig. 5 is a schematic structural diagram of a third embodiment of the loudspeaker of the present invention;

fig. 6 is a schematic structural diagram of a fourth embodiment of the loudspeaker according to the present invention.

The reference numbers illustrate:

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 all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention 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, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a loudspeaker aiming at solving the technical problem reflected by the background technology, and aims to reduce the volume of the loudspeaker and improve the sensitivity of the loudspeaker.

The following description will be made of a specific structure of the speaker according to the present invention in a specific embodiment:

as shown in fig. 1 and 2, in an embodiment of the speaker 100 of the present invention, the speaker 100 includes:

the magnetic circuit system 10 comprises an inner magnetic circuit part 11 and an outer magnetic circuit part 13, wherein the outer magnetic circuit part 13 surrounds the inner magnetic circuit part 11 and surrounds the inner magnetic circuit part 11 to form a magnetic gap 10a, an accommodating cavity 10c is formed between the outer magnetic circuit part 13 and the inner magnetic circuit part 11, and the accommodating cavity 10c is communicated with the outside through the magnetic gap 10a; and

a vibration system 30, wherein the vibration system 30 includes a diaphragm 31 and a voice coil 33, one end of the voice coil 33 extends into the accommodating cavity 10c through the magnetic gap 10a, the diaphragm 31 is accommodated in the accommodating cavity 10c and surrounds the voice coil 33, an inner edge of the diaphragm 31 is connected to a peripheral wall of the voice coil 33, and an outer edge of the diaphragm 31 is connected to the outer magnetic circuit portion 13;

the cavity wall of the accommodating cavity 10c located in front of the vibrating diaphragm 31 is provided with a sound hole 10b communicated with the outside.

It will be appreciated that, for a "moving coil" loudspeaker 100, the performance of the magnetic circuit system 10 directly determines the acoustic performance of the loudspeaker 100, specifically: the magnetic circuit system 10 with strong magnetism can provide better driving force and control force for the vibration system 30, and the sensitivity and low frequency reproduction effect of the corresponding loudspeaker 100 are better. Wherein, the improvement of the low frequency playback effect has great help to the tone quality.

However, the magnetic circuit system 10 having strong magnetism is often unable to separate the high-performance magnet 131 containing rare earth materials. Once the resource allocation of the rare earth material is problematic, or once the resource supply of the rare earth material is problematic, the high performance magnet 131 will be directly absent, thereby directly affecting the performance of the speaker 100 and the associated electronic device.

On the other hand, if the high-performance magnet 131 containing rare earth materials is not used, but the magnetic characteristics of the magnetic circuit system 10 must be maintained, the magnetic circuit system 10 can be generally increased in size only. However, such an approach would directly result in an oversize of the speaker 100, thereby conflicting with the trend of miniaturization of the speaker 100 and the associated electronic equipment.

Therefore, according to the technical solution of the present embodiment, the diaphragm 31 of the speaker 100 is embedded in the magnetic circuit system 10, so that the axial height of the speaker 100 is reduced, and the volume of the speaker 100 is reduced, which is beneficial to the miniaturization of the speaker 100 and the miniaturization of the electronic device (such as a smart sound box) to which the speaker 100 is applied. Meanwhile, for the diaphragms 31 with the same radiation area, the configuration mode of "internally installing" in the magnetic circuit system 10 is adopted, which means that the size of the magnetic circuit system 10 is greatly increased, and the magnetic field strength which can be distributed to the unit radiation area on the diaphragm 31 is increased, so that the driving force and the control force of the magnetic circuit system 10 on the diaphragm 31 are effectively enhanced, and the sensitivity and the low-frequency playback effect of the loudspeaker 100 are better. Moreover, the magnetic circuit system 10 has a margin for improving the vibration performance of the "built-in" diaphragm 31, and is also beneficial to canceling the limitation that the high-performance magnet 131 must be adopted, and helping the magnetic circuit system 10 get rid of the resource limitation of rare earth materials, so that the development of the loudspeaker 100 and the switch of related electronic equipment are not limited and are more flexible, and the cost is lower. In addition, the "built-in" diaphragm 31 has stronger stability, thereby greatly improving the reliability of the loudspeaker 100; meanwhile, the heat dissipation of the loudspeaker 100 is better, and the rated power is also improved.

With regard to the layout of the magnetic circuit system 10, at least the following forms exist:

as shown in fig. 1 and 2, in an embodiment of the speaker 100 of the present invention, the inner magnetic path portion 11 includes a magnetic yoke 111, the magnetic yoke 111 includes a cylindrical body portion 1111 and an extension portion 1113, and the extension portion 1113 is formed by extending one end of the cylindrical body portion 1111 outward;

the outer magnetic circuit portion 13 comprises a magnet 131 and a magnetic conducting plate 133, the magnet 131 is arranged on one side of the extension 1113 where the barrel 1111 is arranged, surrounds the barrel 1111, and is arranged at an interval with the barrel 1111 to enclose the accommodating cavity 10c;

the magnetic conducting plate 133 is disposed on a side of the magnet 131 away from the extension portion 1113, and covers the accommodating cavity 10c, and is spaced from the barrel portion 1111 to form the magnetic gap 10a;

the sound hole 10b is opened on the surface of the magnetic conduction plate 133 facing the accommodating cavity 10c; alternatively, the sound hole 10b is opened in a surface of the extension 1113 facing the housing cavity 10c.

In this embodiment, the cylindrical portion 1111 is disposed vertically, and has a through hole in the middle thereof to communicate the space above and below the magnetic circuit system 10. The extension 1113 is formed by extending the lower end of the barrel 1111 outward and is disposed horizontally. The magnet 131 is of a cylindrical structure and is sleeved outside the cylindrical body 1111; the magnet 131 is supported by the extension 1113 and spaced from the body 1111 to surround the body 1111 and the extension 1113 to form a housing chamber 10c. The magnetic conduction plate 133 is of an annular structure, the outer edge of the magnetic conduction plate 133 is overlapped on the upper surface of the magnet 131, and the inner edge of the magnetic conduction plate 133 surrounds the periphery of the barrel portion 1111 and is arranged at an interval with the barrel portion 1111, so that a magnetic gap 10a communicated with the accommodating cavity 10c is reserved between the magnetic conduction plate and the barrel portion 1111.

The lower end of the voice coil 33 extends into the accommodating cavity 10c through the magnetic gap 10a, and the upper end of the voice coil 33 is exposed out of the accommodating cavity 10c, so that the voice coil 33 is at least partially located in the magnetic gap 10a, specifically: the voice coil 33 includes a bobbin, a lower end of which extends into the housing cavity 10c through the magnetic gap 10a, and a voice coil 33 wire, an upper end of which is exposed out of the housing cavity 10c, and a portion of the bobbin located in the magnetic gap 10a is wound with the voice coil 33 wire. The diaphragm 31 is designed in an annular shape, and is accommodated in the accommodating cavity 10c and disposed around the framework. The inner edge of the diaphragm 31 is fixed to the bobbin, and the outer edge of the diaphragm 31 is fixed to the outer magnetic circuit portion 13.

Thus, when the coil 33 is energized, the coil 33 will drive the frame to vibrate in the vertical direction under the action of the magnetic field, so as to drive the diaphragm 31 to vibrate in the accommodating cavity 10c. At this time, the sound wave generated by the vibration of the diaphragm 31 can be radiated to the outside by matching with the sound hole 10b formed in the magnetic conductive plate 133 or matching with the sound hole 10b formed in the magnetic conductive plate 133, so as to complete sound production.

It can be understood that, under the design of the present embodiment, the magnetic circuit system 10 of the speaker 100 has advantages of simple structure, convenient manufacture, fast assembly, and the like, and meanwhile, the structural stability is strong, so as to provide a stable magnetic field environment for the vibration system 30, thereby improving the reliability of the speaker 100.

Of course, in addition to the above "external magnetic type" magnetic circuit system layout manner, in other embodiments, an "internal magnetic type" magnetic circuit system layout manner, an "internal and external magnetic type" magnetic circuit system layout manner, or other effective and reasonable magnetic circuit system layout manners may be adopted, and those skilled in the art may reasonably select the magnetic circuit system layout manner according to the requirements of the actual application scenarios, and details are not repeated herein.

Note that, as for the material of the magnetic yoke 111 and the magnetic conductive plate 133, a soft magnetic material may be selected, for example: iron, iron alloys, cobalt alloys, nickel alloys, and the like.

With respect to the opening position of the sound hole 10b, there are at least two forms:

(1) As shown in fig. 1 and 2, in an embodiment of the speaker 100 of the present invention, the magnetic conductive plate 133 includes a first annular portion 1331, a second annular portion 1333 and a connecting portion 1335, the first annular portion 1331 surrounds the cylindrical portion 1111 and is spaced apart from the cylindrical portion 1111 to form the magnetic gap 10a;

the second annular part 1333 surrounds the first annular part 1331 and is spaced apart from the first annular part 1331 to form the sound hole 10b;

the connection portion 1335 is disposed between the first annular portion 1331 and the second annular portion 1333, and connects the first annular portion 1331 and the second annular portion 1333, and the second annular portion 1333 is disposed above the magnet 131.

It can be understood that, under the design of the present embodiment, the sound hole 10b is formed on the magnetic conductive plate 133, which not only can realize that the vibration energy of the diaphragm 31 is radiated outwards through the magnetic conductive plate 133 to realize sound production; moreover, the sound hole 10b can also present a ring design, which can effectively avoid the obstruction of sound wave transmission, thereby being beneficial to improving the acoustic performance of the loudspeaker 100.

In addition, in this embodiment, a plurality of connection portions 1335 are provided, the plurality of connection portions 1335 are sequentially arranged at intervals along the circumferential direction of the first annular portion 1331, inner ends of the plurality of connection portions 1335 are all connected to the outer edge of the first annular portion 1331, and outer ends of the plurality of connection portions 1335 are all connected to the inner edge of the second annular portion 1333. In this way, the structural stability of the magnetic conductive plate 133 is improved, so that a more stable magnetic field environment can be provided for the vibration system 30.

The first annular portion 1331, the second annular portion 1333 and the connecting portion 1335 may be integrally formed; or they may be separately manufactured and then assembled together by means of, for example, bonding, welding, etc.

(2) As shown in fig. 3 and 4, in an embodiment of the speaker 100 of the present invention, the extension part 1113 includes a ring part 1113a and a fixing part 1113b, the ring part 1113a surrounds the periphery of the cylinder 1111 and is spaced apart from the cylinder 1111 to form the sound hole 10b;

the fixing portion 1113b is provided between the annular portion 1113a and the body portion 1111 and connects the annular portion 1113a and the body portion 1111, and the magnet 131 is provided on the annular portion 1113 a.

It can be understood that, under the design of the present embodiment, the sound hole 10b is formed on the extension 1113 of the magnetic conducting yoke 111, which not only enables the vibration energy of the diaphragm 31 to be radiated outwards through the extension 1113 of the magnetic conducting yoke 111, thereby realizing sound emission; moreover, the sound hole 10b can also present a ring design, which can effectively avoid the obstruction to the sound wave transmission, thereby being beneficial to improving the acoustic performance of the loudspeaker 100.

In addition, it should be added that in this embodiment, a plurality of fixing portions 1113b are provided, the plurality of fixing portions 1113b are sequentially arranged along the circumferential direction of the barrel portion 1111 at intervals, the inner ends of the plurality of fixing portions 1113b are all connected to the outer sidewall of the barrel portion 1111, and the outer ends of the plurality of fixing portions 1113b are all connected to the inner edge of the annular portion 1113 a. In this way, the structural stability of the magnetic yoke 111 is improved, so that a more stable magnetic field environment can be provided for the vibration system 30.

The annular part 1113a and the fixing part 1113b may be integrally formed and processed together; or may be separately manufactured and then assembled together by means of, for example, bonding, welding, etc.

As shown in fig. 1 and 2, in an embodiment of the loudspeaker 100 of the present invention, the vibration system 30 further includes a damper 35, the damper 35 is accommodated in the accommodating cavity 10c and surrounds the voice coil 33, the damper 35 is located behind the diaphragm 31, an inner edge of the damper 35 is connected to the circumferential wall of the voice coil 33, and an outer edge of the damper 35 is connected to the outer magnetic path portion 13.

In this embodiment, the centering support 35 is designed in a ring shape, is accommodated in the accommodating cavity 10c, and is disposed around the bobbin of the voice coil 33. The inner edge of the damper 35 is fixed to the bobbin of the voice coil 33, and the outer edge of the damper 35 is fixed to the outer magnetic path portion 13.

It will be appreciated that by providing the centring lug 35, it is ensured that the voice coil 33 is always maintained in the correct position in the magnetic gap 10a. When the voice coil 33 is forced to vibrate, the centering support 35 can ensure that the vibration system 30 only moves axially, thereby preventing distortion. On the other hand, the damper 35 may provide compliance for vibration of the voice coil 33 and vibration of the vibration system 30.

It should be noted that, as for the diaphragm 31, there are two directions, namely, the front of the diaphragm 31 and the back of the diaphragm 31. The front of the diaphragm 31, that is, refers to a direction in which a surface of the diaphragm 31 facing the sound hole 10b faces. The rear of the diaphragm 31, that is, the direction in which the surface of the diaphragm 31 facing away from the sound hole 10b faces.

As shown in fig. 1 and fig. 2, in an embodiment of the speaker 100 of the present invention, the outer magnetic circuit portion 13 further includes a bracket 135, the bracket 135 is disposed in the accommodating cavity 10c and is disposed around the magnet 131 in a surrounding direction, and an outer edge of the diaphragm 31 is connected to the bracket 135.

In this embodiment, the bracket 135 has a cylindrical structure and is disposed around the inner sidewall of the magnet 131. The outer side wall of the bracket 135 is attached to the inner side wall of the magnet 131, the lower end of the bracket 135 is supported on the extension 1113 of the magnetic yoke 111, and the upper end of the bracket 135 is connected to the outer edge of the diaphragm 31. Thus, the structural stability of the bracket 135 can be effectively improved, and the structural stability of the diaphragm 31 can be improved. The outer edge of the centering leg 35 is also connected to the bracket 135.

It will be appreciated that, by configuring the support 135, a stable foundation can be provided for the installation of the diaphragm 31 and the damper 35, so as to improve the structural stability of the diaphragm 31 and the damper 35, and thus improve the operational reliability of the vibration system 30. On the other hand, the diaphragm 31 and the damper 35 are fixed to the bracket 135 at the same time, which is advantageous in that the damper 35 and the diaphragm 31 are coaxially arranged, and the damper 35 holds the diaphragm 31 at the middle position of the magnetic gap 10a.

Of course, in other embodiments, the bracket 135 may take other effective and reasonable forms, such as: the bracket 135 is a plurality of unit pieces which are separately arranged, the plurality of unit pieces are sequentially arranged at intervals along the surrounding direction of the external magnetic circuit part 13, and the plurality of unit pieces are simultaneously connected to the outer edge of the vibrating diaphragm 31 to fix the outer edge of the vibrating diaphragm 31. Those skilled in the art can make reasonable selection according to the requirements of the actual application scenario, and details are not repeated here.

As shown in fig. 1 and fig. 2, in an embodiment of the speaker 100 of the present invention, the diaphragm 31 includes a corrugated rim 311 and a diaphragm body 313, an outer edge of the corrugated rim 311 is connected to the outer magnetic circuit portion 13, an inner edge of the corrugated rim 311 is connected to an outer edge of the diaphragm body 313, and an inner edge of the diaphragm body 313 is connected to a peripheral wall of the voice coil 33;

the edge 311 is recessed toward the rear of the diaphragm 31, and the diaphragm body 313 is gradually away from the sound hole 10b along the direction from the outer edge of the diaphragm 31 to the center of the diaphragm 31.

It can be understood that, in the design of the present embodiment, the diaphragm 31 is configured to be in a "concave" structure, so that the diaphragm 31 can be prevented from touching other components during the vibration process, and interference can be avoided, thereby ensuring that the performance of the speaker 100 is not affected. On the other hand, the design of the embodiment can also provide more excellent compliance for the diaphragm 31.

As shown in fig. 1 and fig. 2, in an embodiment of the speaker 100 of the present invention, the vibration system 30 further includes a dust cap 37, and the dust cap 37 covers an opening at an end of the voice coil 33 outside the receiving cavity 10c.

Here, there are at least two embodiments:

(1) As shown in fig. 1 and 2, in an embodiment of the loudspeaker 100 of the present invention, the sound hole 10b is opened in the magnetic conductive plate 133. At this time, the diaphragm 31 radiates acoustic energy outward through the sound hole 10b of the magnetic conductive plate 133, and the dust cap 37 radiates acoustic energy directly toward the diaphragm 31.

(2) As shown in fig. 3 and 4, in an embodiment of the speaker 100 of the present invention, the sound hole 10b is opened on the extension 1113 of the yoke 111. At this time, the diaphragm 31 radiates acoustic energy to the outside through the acoustic hole 10b in the extension 1113 of the yoke 111, and the dust cap 37 radiates acoustic energy in the direction in which the diaphragm 31 radiates acoustic energy through the through hole in the body 1111 of the yoke 111.

It can be understood that the radiation area of the vibration system 30 can be increased by configuring the dust cap 37, and the high-frequency performance of the speaker 100 can be further optimized, thereby improving the high-frequency sensitivity of the speaker 100. On the other hand, the dust cap 37 can also play a certain role in preventing water and dust, and reduce the probability that the loudspeaker 100 is corroded by moisture and dust.

Note that the dust cap 37 may be made of the same material as the diaphragm 31. The shape of the dust cap 37 may have various forms other than the planar structure used in the present embodiment, for example: convex arc structure, concave arc structure, etc. Those skilled in the art can make reasonable selection according to the requirements of the actual application scenario, and details are not repeated here.

In the embodiment of the "dust cap 37" in which the sound hole 10b is opened in the extension 1113 of the yoke 111 ", the speaker 100 may be configured as follows in order to protect the dust cap 37 and reduce the possibility of damage caused by invasion:

as shown in fig. 3 and 4, in an embodiment of the speaker 100 of the present invention, the speaker 100 further includes a frame 50, the frame 50 includes a surrounding portion 51 and a cover portion 53, the surrounding portion 51 surrounds the magnetic circuit system 10 for fixing the magnetic circuit system 10, and the cover portion 53 covers one end of the surrounding portion 51 and covers the outer side of the dust cap 37.

In the present embodiment, the surrounding portion 51 has a substantially cylindrical structure, and the magnetic circuit system 10 is fixed to the inner surface of the surrounding portion 51. The distance that the lower extreme of portion 51 of wrapping protrudes magnetic conduction board 133 is greater than the distance that dust cap 37 protrudes magnetic conduction board 133, and closing cap portion 53 is planar structure to the lower extreme at portion 51 of wrapping is covered, in order to "include" dust cap 37 in basin frame 50.

As shown in fig. 5, in an embodiment of the speaker 100 of the present invention, the speaker 100 further includes an auxiliary system 70, the auxiliary system 70 includes a magnetic circuit assembly 71, an end surface of the magnetic circuit system 10, on which the sound hole 10b is opened, is opened with an installation slot, the magnetic circuit assembly 71 is disposed in the installation slot and spaced from a slot side wall of the installation slot to form an auxiliary magnetic gap 70a;

the auxiliary system 70 further includes a sub-diaphragm 73 and a sub-voice coil 75 for driving the sub-diaphragm 73 to vibrate, and the sub-voice coil 75 is inserted into the sub-magnetic gap 70 a.

Here, there are at least two embodiments:

(1) As shown in fig. 5, in an embodiment of the speaker 100 of the present invention, the sound hole 10b is opened on the magnetic conductive plate 133 (see fig. 2 for a specific form). At this time, in the magnetic conductive yoke 111, the mounting groove is opened on the end face of the barrel portion 1111 far from the extension portion 1113, and the magnetic circuit assembly 71 includes the auxiliary magnet 711 and the auxiliary magnetic conductive plate 713 which are sequentially stacked on the bottom wall of the mounting groove; the outer edge of the auxiliary magnetic conduction plate 713 and the groove side wall of the mounting groove are arranged at intervals to form the auxiliary magnetic gap 70a; a sub voice coil 75 is inserted into the sub magnetic gap 70a and connected to the inner surface of the sub diaphragm 73; the outer edge of the sub-diaphragm 73 is fixed to the body 1111. Specifically, the auxiliary system 70 may be disposed coaxially with the magnetic circuit system 10 and the vibration system 30, which corresponds to a structural form of the coaxial speaker 100 formed together with the magnetic circuit system 10 and the vibration system 30.

(2) As shown in fig. 6, in an embodiment of the speaker 100 of the present invention, the sound hole 10b is opened on the extension 1113 of the magnetic yoke 111 (see fig. 4 for a specific form). At this time, in the magnetic conductive yoke 111, the end face of the cylindrical portion 1111 near the extension portion 1113 is provided with the mounting groove, and the magnetic circuit assembly 71 includes the auxiliary magnet 711 and the auxiliary magnetic conductive plate 713 that are sequentially stacked on the bottom wall of the mounting groove; the outer edge of the auxiliary magnetic conduction plate 713 and the groove side wall of the mounting groove are arranged at intervals to form the auxiliary magnetic gap 70a; a sub voice coil 75 is inserted into the sub magnetic gap 70a and connected to the inner surface of the sub diaphragm 73; the sub-diaphragm 73 is fixed at its outer edge to the cylinder portion 1111. Specifically, the auxiliary system 70 may be disposed coaxially with the magnetic circuit system 10 and the vibration system 30, which corresponds to a structural form of the coaxial speaker 100 formed together with the magnetic circuit system 10 and the vibration system 30.

Understandably, by configuring the auxiliary system 70, the same point of the low-frequency sounding magnetic circuit system and the high-frequency sounding magnetic circuit system can be coaxial, accurate sound reproduction can be realized, the phases are consistent, the sound reproduction effect can be obviously improved, and the auxiliary system is specifically as follows: because voice coil 33 is lighter among the high frequency sound production system, high frequency sensitivity can promote to can promote the efficiency of high frequency sound production, also be favorable to obtaining a smooth frequency response characteristic. Meanwhile, the low-frequency sounding system has better driving force and lower cut-off frequency, so that the bass tone is thicker and fuller. That is, the user can get a better sound quality experience.

In an embodiment of the speaker 100 of the present invention, the magnet 131 is made of a ferrite magnetic material. It should be noted that the ferrite magnet 131 has the following advantages: (1) The coercive force is large and is between the alnico magnet 131 and the rare earth magnet 131; meanwhile, the remanence is lower, so that the loudspeaker is more suitable for being designed into a flat shape, namely the height-to-diameter ratio is less than 1, and the reduction of the axial dimension of the loudspeaker 100 is realized; (2) The magnetic crystal anisotropy constant is large, the demagnetization curve is approximate to a straight line, and the resistivity is high; (2) Rich resources, low price, especially no noble metals such as nickel, cobalt and the like, oxidation resistance, corrosion resistance and small mass.

Of course, in other embodiments, the material of the secondary magnet 711 may also be a ferrite magnetic material.

The present invention further provides an electronic device, where the electronic device includes a speaker 100, and the specific structure of the speaker 100 refers to the foregoing embodiments, and since the electronic device adopts all technical solutions of all the foregoing embodiments, the electronic device at least has all beneficial effects brought by all the technical solutions of all the foregoing embodiments, and details are not repeated here.

It is understood that the electronic device may be, but is not limited to, a mobile phone, a notebook, a tablet, a Personal Digital Assistant (PDA), an e-book reader, an MP3 (motion Picture Experts compressed standard Audio Layer 3, moving Picture Experts Group Audio Layer III) player, an MP4 (motion Picture Experts compressed standard Audio Layer 4, moving Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a handheld game console, a virtual and real device, an augmented reality device, a normal speaker, a smart speaker, etc.

The above description is only a preferred embodiment of the present invention, and 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, comprising:

the cavity wall of the containing cavity, which is positioned in front of the vibrating diaphragm, is provided with a sound hole communicated with the outside;

the vibrating diaphragm comprises a folding ring and a vibrating diaphragm body, the outer edge of the folding ring is connected to the outer magnetic circuit part, the inner edge of the folding ring is connected to the outer edge of the vibrating diaphragm body, and the inner edge of the vibrating diaphragm body is connected to the peripheral wall of the voice coil;

2. The speaker of claim 1, wherein the inner circuit portion includes a magnetic conductive yoke including a cylinder portion and an outward extension portion formed by extending outward from one end of the cylinder portion;

the magnetic conducting plate is arranged on one side of the magnet, which is far away from the epitaxial part, covers the accommodating cavity and is arranged at an interval with the barrel part to form the magnetic gap;

3. The loudspeaker of claim 2, wherein said flux plate includes a first annular portion, a second annular portion, and a connecting portion, said first annular portion surrounding said barrel portion and being spaced from said barrel portion to form said magnetic gap;

the second annular part surrounds the first annular part and is arranged at a distance from the first annular part to form the sound hole;

4. The speaker of claim 2, wherein the extension portion includes a ring portion and a fixing portion, the ring portion surrounding the cylindrical body portion and being spaced apart from the cylindrical body portion to form the sound hole;

5. A loudspeaker according to claim 2, wherein the outer magnetic circuit portion further comprises a bracket disposed in the receiving chamber and arranged to surround in the direction of the magnet, the outer periphery of the diaphragm being connected to the bracket.

6. The loudspeaker of claim 1, wherein said vibration system further comprises a spider housed in said housing chamber and surrounding said voice coil, said spider being located behind said diaphragm, an inner edge of said spider being connected to said surrounding wall of said voice coil, and an outer edge of said spider being connected to said outer magnetic path portion.

7. The loudspeaker of claim 1, wherein the vibration system further comprises a dust cap covering an opening at an end of the voice coil outside the receptacle.

8. The speaker of claim 7, further comprising a frame including a surrounding portion surrounding the magnetic circuit system for fixing the magnetic circuit system, and a cover portion covering one end of the surrounding portion and covering an outer side of the dust cap.

9. The loudspeaker according to any one of claims 1 to 8, further comprising an auxiliary system, the auxiliary system comprising a magnetic circuit assembly, an end surface of the magnetic circuit system, on which the sound hole is opened, being opened with a mounting groove, the magnetic circuit assembly being disposed in the mounting groove and spaced from a groove side wall of the mounting groove to form an auxiliary magnetic gap;

10. An electronic device, characterized in that it comprises a loudspeaker according to any one of claims 1 to 9.