CN110366080B

CN110366080B - Speaker and audio device

Info

Publication number: CN110366080B
Application number: CN201910728059.5A
Authority: CN
Inventors: 朱小田; 董志永
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2021-05-07
Anticipated expiration: 2039-08-07
Also published as: CN110366080A; WO2021022774A1

Abstract

The invention discloses a loudspeaker and audio device, the loudspeaker includes: a support; the magnetic circuit system is arranged on the bracket and is provided with a magnetic circuit gap and a cone vibration space arranged on the inner side of the magnetic circuit gap; the vibration system comprises a vibration diaphragm, an elastic wave and a voice coil, the vibration diaphragm comprises a cone part and an elastic connecting part connected to the periphery of the cone part, the outer edge of the elastic connecting part is connected to the support, the bottom of the cone part is arranged in a cone vibration space, and the elastic wave is connected with the cone part and the magnetic circuit system; one end of the voice coil is connected to the elastic connecting portion, and the other end of the voice coil extends into the magnetic circuit gap. Therefore, the distance between the vibrating diaphragm and the upper end of the vibration system can be reduced on the premise of ensuring that the maximum amplitude of the voice coil has a large value, so that the thickness of the loudspeaker is reduced.

Description

Speaker and audio device

Technical Field

The invention relates to the technical field of electroacoustic, in particular to a loudspeaker and an audio device.

Background

Along with the development trend that electronic products (such as televisions and the like) are gradually integrated and thinned in the current market, higher and higher requirements are put forward on the loudspeaker embedded in the electronic products; especially for low frequency speakers, the demand for thinness is increasing. The traditional conical loudspeaker has larger volume and can not gradually meet the requirement of the market on ultra-thinness.

Disclosure of Invention

The invention mainly aims to provide a thin loudspeaker.

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

a support;

the magnetic circuit system is arranged on the bracket and is provided with a magnetic circuit gap and a cone vibration space arranged on the inner side of the magnetic circuit gap; and

the vibration system comprises a vibration diaphragm, an elastic wave and a voice coil, the vibration diaphragm comprises a cone part and an elastic connecting part connected to the periphery of the cone part, the outer edge of the elastic connecting part is connected to the support, the bottom of the cone part is arranged in the cone vibration space, and the elastic wave is connected with the cone part and the magnetic circuit system; one end of the voice coil is connected to the elastic connecting portion, and the other end of the voice coil extends into the magnetic circuit gap.

Optionally, a preset annular region is arranged between the inner edge and the outer edge of the elastic connecting part, and the voice coil is connected in the preset annular region so as to increase the amplitude of the voice coil when the diaphragm vibrates at the same vibration amplitude.

Optionally, in a cross section passing through a center line of the diaphragm, a first distance (D4) is provided between a connection position of the voice coil and the elastic connection portion and an inner edge of the elastic connection portion, a second distance (D3) is provided between an inner edge and an outer edge of the elastic connection portion, and the first distance (D4) and the second distance (D3) have a first ratio, and the first ratio is greater than or equal to 0.3 and less than or equal to 0.7.

Optionally, in a cross section passing through the center line of the diaphragm, a third distance (D1) is provided between the inner edge of the elastic connection portion and the center line of the diaphragm, a fourth distance (D2) is provided between the connection position of the voice coil and the elastic connection portion and the center line of the diaphragm, a fifth distance (D) is provided between the outer edge of the elastic connection portion and the center line of the diaphragm, and a second ratio is provided between the third distance (D1) and the fifth distance (D), wherein the second ratio is greater than or equal to 0.15 and less than 0.55; a third ratio between the fourth distance (D2) and the fifth distance (D), the third ratio being greater than or equal to 0.55 and less than or equal to 0.85; the third ratio is greater than the second ratio.

Optionally, the overall thickness of the speaker is greater than or equal to 7 millimeters and less than or equal to 12 millimeters.

Optionally, one end of the elastic wave is connected to the bottom of the cone-shaped basin, and the other end of the elastic wave is connected to the magnetic circuit system.

Optionally, the magnetic circuit system includes a first magnetic conducting member and a central magnetic circuit, the first magnetic conducting member includes a first substrate and a first magnetic conducting protruding portion protruding from a surface of the first substrate and annularly distributed, the central magnetic circuit is disposed inside the first magnetic conducting protruding portion, the magnetic circuit gap is formed between the central magnetic circuit and the first magnetic conducting protruding portion, and the cone vibration space is formed in a middle portion of the central magnetic circuit.

Optionally, the first magnetic conducting piece further includes a second magnetic conducting convex portion protruding from the surface of the first substrate and distributed in an annular shape, the second magnetic conducting convex portion is disposed inside the first magnetic conducting convex portion, and the first magnetic conducting convex portion protrudes from the second magnetic conducting convex portion;

the central magnetic circuit comprises a second magnetic conduction convex part, first magnets distributed in an annular shape and a second magnetic conduction piece arranged in an annular shape, the second magnetic conduction piece and the first magnets are sequentially stacked on the second magnetic conduction convex part, and the first magnets are arranged between the second magnetic conduction piece and the second magnetic conduction convex part;

the magnetic circuit gap is formed between the second magnetic conduction piece and the first magnetic conduction convex part, and the cone vibration space is formed on the inner sides of the second magnetic conduction convex part, the first magnet and the second magnetic conduction piece.

Optionally, the inner edge of the first magnet protrudes inwards from the second magnetic conductive convex part, the elastic wave is connected to the lower surface of the inner edge of the first magnet, and the other end of the elastic wave is connected to the conical basin part.

Optionally, the speaker further includes a heat insulating member, the heat insulating member is disposed on a lower surface of the inner edge of the first magnet, and the damper is connected to the lower surface of the heat insulating member.

Optionally, the first substrate is provided with a heat dissipation through hole communicated with the cone vibration space, and the speaker further comprises a heat dissipation member hermetically connected to the heat dissipation through hole.

Optionally, the outer edge of the first substrate protrudes outward from the first magnetic conductive protruding portion; the support comprises a bottom plate and a surrounding plate which is convexly arranged on the surface of the bottom plate, the bottom plate is provided with a mounting through hole, the first magnetic conduction piece is arranged in the mounting through hole, and the bottom plate is connected to the upper surface of the outer edge of the first substrate.

Optionally, the magnetic circuit system includes a third magnetic conductive member and an edge magnetic circuit, the third magnetic conductive member includes a second substrate and an annular magnetic conductive portion protruding from the surface of the second substrate, the edge magnetic circuit is disposed on the periphery of the annular magnetic conductive portion, the magnetic circuit gap is formed between the annular magnetic conductive portion and the edge magnetic circuit, and the cone vibration space is formed inside the annular magnetic conductive portion.

Optionally, the side magnetic circuit includes a second magnet and a fourth magnetic conductive member, the second magnet and the fourth magnetic conductive member are annularly distributed, the second magnet and the fourth magnetic conductive member are sequentially stacked on the surface of the second substrate, and the second magnet is disposed between the fourth magnetic conductive member and the second substrate; the annular magnetic conduction part and the fourth magnetic conduction part form the magnetic circuit gap.

Optionally, the magnetic circuit system includes a third magnetic conductive member, a fifth magnetic conductive member and an edge magnetic circuit, the third magnetic conductive member includes a second substrate and an annular magnetic conductive portion protruding from the surface of the second substrate, the edge magnetic circuit is disposed on the periphery of the annular magnetic conductive portion, the fifth magnetic conductive member is annularly distributed at the upper end of the annular magnetic conductive portion, a magnetic circuit gap is formed between the fifth magnetic conductive member and the edge magnetic circuit, and the annular magnetic conductive portion and the inner side of the fifth magnetic conductive member form the cone vibration space;

the inner edge of the fifth magnetic conduction piece protrudes inwards from the annular magnetic conduction part, one end of the elastic wave is connected to the lower surface of the inner edge of the fifth magnetic conduction piece, and the other end of the elastic wave is connected to the cone part.

Optionally, the voice coil has a lead, and the lead portion is fixed to a lower surface of the elastic connection portion.

The invention also provides an audio device comprising the loudspeaker. The speaker includes:

a support;

The loudspeaker of the invention at least can realize the following effects by dividing the vibrating diaphragm into the cone basin part and the elastic connecting part which are connected with each other:

1) the vibration performance of the vibrating diaphragm can be ensured.

2) Compared with the vibrating diaphragm which is integrally made into a plane shape, the loudspeaker has the advantages that the cone basin part is arranged, and the cone basin part is connected with the elastic wave, so that the interaction between the cone basin part and the elastic wave is enhanced, and the vibration stability of the vibrating diaphragm and a vibration system can be ensured.

3) Compared with the loudspeaker in which the vibrating diaphragm is integrally made into the cone shape, the loudspeaker provided by the invention has the advantages that the cone part is arranged corresponding to the vibration space of the cone through the elastic connecting part, so that the vibrating diaphragm can be effectively prevented from interfering with a magnetic circuit system in the vibration process, the distance between the vibrating diaphragm and the upper end of the vibration system can be reduced on the premise of ensuring that the maximum amplitude of the voice coil has a large value, and the thickness of the loudspeaker can be reduced.

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 speaker according to an embodiment of the present invention;

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

FIG. 3 is a schematic structural view of the stent of FIG. 2;

FIG. 4 is a schematic structural diagram of the diaphragm in FIG. 2;

FIG. 5 is a schematic view of the voice coil of FIG. 2;

FIG. 6 is a schematic cross-sectional view of the loudspeaker of the present invention taken along line I-I of FIG. 1;

FIG. 7 is a partial schematic structural view of the left side of the speaker of FIG. 6;

FIG. 8 is a schematic diagram of a dimensioning structure for the loudspeaker of FIG. 7;

fig. 9 is a schematic structural diagram of another embodiment of the loudspeaker of the present invention;

FIG. 10 is a partial schematic structural view of the left side of the speaker of FIG. 9;

fig. 11 is a schematic structural diagram of a speaker according to yet another embodiment of the present invention;

fig. 12 is a partial schematic view of the left side of the speaker of fig. 11.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Loudspeaker	43	Lead wire
10	Support frame	50	First magnetic conduction piece
				11	Base plate	51	First substrate
111	Mounting through hole	511	Heat radiation through hole
				12	Boarding board	512	Heat sink
13	Connecting ring plate	52	First magnetic conductive convex part
				14	Edge folding	53	Second magnetic conductive convex part
15	Connecting terminal	61	First magnet
				20	Vibrating diaphragm	62	Second magnetic conduction piece
21	Conical basin part	70	Third magnetic conduction piece
				22	Elastic connecting part	71	Second substrate
221	A first annular connecting part	72	Annular magnetic conduction part
				222	Second annular connecting part	73	Fifth magnetic conduction piece
23	Raised part	81	Second magnet
				24	Folding ring	82	Fourth magnetic conduction piece
30	Elastic wave	90	Heat insulation piece
				40	Voice coil	1	Magnetic circuit gap
41	Voice coil framework	2	Vibration space of cone basin
				42	Coil

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 the description of "first", "second", etc. is provided in the embodiment of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

The invention provides a loudspeaker which is mainly used for playing low-frequency signals.

In an embodiment of the present invention, as shown in fig. 1, 2, 4, 6 and 7, the speaker 100 includes:

a support 10;

the magnetic circuit system is arranged on the bracket 10 and is provided with a magnetic circuit gap 1 and a cone vibration space 2 arranged on the inner side of the magnetic circuit gap 1; and

the vibration system comprises a vibration diaphragm 20, an elastic wave 30 and a voice coil 40, wherein the vibration diaphragm 20 comprises a cone-shaped basin portion 21 and an elastic connecting portion 22 connected to the periphery of the cone-shaped basin portion 21, the outer edge of the elastic connecting portion 22 is connected to the support 10, the bottom of the cone-shaped basin portion 21 is arranged in the cone-shaped basin vibration space 2, and the elastic wave 30 is connected with the cone-shaped basin portion 21 and a magnetic circuit system; one end of the voice coil 40 is connected to the elastic connection portion 22, and the other end of the voice coil 40 extends into the magnetic circuit gap 1.

In the present invention, the directional term "inner" refers to a direction toward the centerline shown by the dashed line in fig. 6, 9 and 11, and the directional term "outer" refers to a direction away from the centerline shown by the dashed line in fig. 6, 9 and 11.

As shown in fig. 6, the conical basin portion 21 is substantially conical basin-shaped, the conical basin portion 21 is disposed corresponding to the conical basin vibration space 2, and the lower portion of the conical basin portion 21 can vibrate in the conical basin vibration space 2. 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.

Specifically, after the audio signal is turned on, a changing magnetic field is generated in the magnetic circuit gap 1, the changing magnetic field can drive the voice coil 40 to vibrate in the magnetic circuit gap 1, and the voice coil 40 can drive the diaphragm 20 to vibrate to generate sound. When the vibrating diaphragm 20 vibrates, the lower part of the cone-shaped part 21 can vibrate in the cone-shaped vibration space 2; meanwhile, the damper 30 vibrates together with the diaphragm 20 to improve stability of the diaphragm 20 and vibration of the vibration system.

Specifically, the elastic wave 30 is installed in the cone vibration space 2, one end of the elastic wave 30 is connected to the cone portion 21, and the other end of the elastic wave 30 is connected to the magnetic system.

According to the loudspeaker 100, the cone vibration space 2 is arranged on the inner side of the magnetic circuit gap 1, so that the vibration of the cone portion 21 can be avoided, the cone portion 21 can vibrate in the cone vibration space 2, and therefore sufficient vibration space can be provided for the vibration of the cone portion 21, and the low-frequency high-power output of the loudspeaker 100 can be realized; and an installation space can be provided for the damper 30, so that the thickness of the loudspeaker 100 can be reduced, and the ultrathin design of the loudspeaker 100 can be realized.

Here, the thickness of the speaker 100 refers to the entire thickness of the speaker 100 in the direction in which the center line of the diaphragm 20 extends.

Meanwhile, the speaker 100 of the present invention can achieve at least the following effects by dividing the diaphragm 20 into the cone portion 21 and the elastic connection portion 22 which are connected to each other:

1) it is advantageous to ensure the vibration performance of the diaphragm 20.

2) Compared with the whole vibrating diaphragm 20 made into a plane shape, the loudspeaker 100 of the present invention has the cone-shaped portion 21, and the cone-shaped portion 21 is connected to the damper 30, so as to enhance the interaction between the cone-shaped portion 21 and the damper 30, thereby ensuring the vibration stability of the vibrating diaphragm 20 and the vibration system.

3) Compared with the loudspeaker 100 in which the diaphragm 20 is integrally made into the cone shape, the loudspeaker 100 of the present invention has the elastic connection portion 22, so that the cone portion 21 is disposed corresponding to the cone vibration space 2, and the diaphragm 20 can be effectively prevented from interfering with the magnetic circuit system during the vibration process, so that the distance between the diaphragm 20 and the upper end of the magnetic circuit system can be reduced on the premise of ensuring that the maximum amplitude of the voice coil 40 has a large value, so as to reduce the thickness of the loudspeaker 100.

Specifically, in the projection of the magnetic circuit system on the diaphragm 20, the outer edge of the cone-shaped portion 21 is disposed adjacent to the edge of the cone-shaped vibration space 2, so as to effectively avoid the interference between the diaphragm 20 and the magnetic circuit system during the vibration process.

Further, as shown in fig. 6 and 7, the elastic connection portion 22 has a predetermined annular region between an inner edge and an outer edge thereof, and the voice coil 40 is connected to the predetermined annular region; namely, the connection position of the voice coil 40 and the elastic connection portion 22 is located within the predetermined annular region. In this way, compared to the voice coil 40 connected to the outer edge of the diaphragm 20, the voice coil 40 can be connected to the inner side of the outer edge of the diaphragm 20 to increase the amplitude of the voice coil 40 when the diaphragm 20 vibrates with the same vibration amplitude.

It is understood that, when the diaphragm 20 vibrates, the amplitude of the vibration is smaller closer to the outer edge of the diaphragm 20, and compared to the case where the voice coil 40 is connected to the outer edge of the diaphragm 20, the speaker 100 of the present invention can increase the amplitude of the voice coil 40 to increase the maximum amplitude of the voice coil 40 when the diaphragm 20 vibrates with the same amplitude of vibration by connecting the voice coil 40 to the inner side of the outer edge of the diaphragm 20. In other words, the speaker 100 of the present invention, by attaching the voice coil 40 to the inner side of the outer edge of the diaphragm 20, can reduce the distance between the diaphragm 20 and the upper end of the magnetic circuit system to reduce the thickness of the speaker 100, on the premise of ensuring that the maximum amplitude of the voice coil 40 has a large value, by increasing the radial dimension of the diaphragm 20.

It will be appreciated that the outer edge of the predetermined annular region should be at a distance from the outer edge of the diaphragm 20 to ensure that the maximum amplitude of the voice coil 40 has a sufficiently large value; the inner edge of the predetermined annular region should also have a distance from the inner edge of the resilient connecting portion 22 (i.e. the outer edge of the cone portion 21) to provide sufficient installation space for the central magnetic circuit of the magnetic circuit system.

Alternatively, the voice coil 40 is connected to the middle of the elastic connection portion 22.

In a specific embodiment, the diaphragm 20 may have a circular, racetrack, oval, or square shape, and the voice coil 40 may have a circular, racetrack, oval, or square cross-sectional shape; the position of the voice coil 40 will be described in detail below by taking as an example that the cross-sectional shapes of the diaphragm 20 and the voice coil 40 are both substantially circular, but the present invention is not limited thereto; it will be appreciated that when the diaphragm 20 and voice coil 40 are provided in other shapes, the corresponding structural features are readily obtained by analogy with when they are provided in a circular shape, and need not be described in detail herein.

Further, as shown in fig. 7 and 8, in a cross section passing through a center line of the diaphragm 20, a first distance D4 exists between a connection position of the voice coil 40 and the elastic connection portion 22 and an inner edge of the elastic connection portion 22, a second distance D3 exists between the inner edge and an outer edge of the elastic connection portion 22, the first distance D4 and the second distance D3 have a first ratio, and the first ratio K1 is greater than or equal to 0.3 and less than or equal to 0.7, that is, the ratio of the first distance D4 to the second distance D3 is greater than or equal to 0.3 and less than or equal to 0.7, that is, 0.3 ≦ K1 ≦ D4/D3 ≦ 0.7. In this way, the elastic connection portion 22 can be partially disposed outside the magnetic path gap 1 and partially disposed inside the magnetic path gap 1.

It is understood that if the first ratio K1 is too small, the voice coil 40 will be too close to the outer edge of the diaphragm 20, and the thickness of the speaker 100 will not be effectively reduced. If the first ratio K1 is too large, the voice coil 40 is too close to the inner edge of the elastic connection portion 22 (i.e., the outer edge of the cone portion 21), and the installation space of the central magnetic circuit of the magnetic circuit system is greatly compressed, which is not favorable for the design of the magnetic circuit system. Therefore, optionally, the first ratio K1 is greater than or equal to 0.3 and less than or equal to 0.7.

More specifically, the first ratio K1 may be greater than or equal to 0.4 and less than or equal to 0.6, so as to further thin the speaker 100 while ensuring the acoustic performance of the speaker 100.

Further, as shown in fig. 7 and 8, in a cross-section passing through the center line of the diaphragm 20, a third distance D1 is provided between the inner edge of the elastic connection portion 22 (i.e., the outer edge of the cone portion 21) and the center line of the diaphragm 20, a fourth distance D2 is provided between the connection position of the voice coil 40 and the elastic connection portion 22 and the center line of the diaphragm 20, a fifth distance D is provided between the outer edge of the elastic connection portion 22 and the center line of the diaphragm 20, and a second ratio K2 is provided between the third distance D1 and the fifth distance D, where the second ratio K2 is greater than or equal to 0.15 and less than or equal to 0.55, i.e., 0.15 ≦ K2 ≦ D1/D ≦ 0.55.

The fourth distance D2 and the fifth distance D have a third ratio K3, the third ratio K3 is greater than or equal to 0.55 and less than or equal to 0.85, i.e., 0.55 ≦ K3 ≦ D2/D ≦ 0.85.

Specifically, the third ratio is greater than the second ratio

It is understood that the second ratio K2 represents the ratio of the cone-shaped portion 21 to the diaphragm 20, and if the second ratio K2 is too small, the ratio of the cone-shaped portion 21 is too small, and the interaction between the cone-shaped portion 21 and the elastic wave 30 is greatly weakened, so that the vibration stability of the diaphragm 20 and the vibration system is reduced. If the second ratio K2 is too large, the ratio of the cone portion 21 is too large, and the diaphragm 20 is likely to interfere with the magnetic circuit system during vibration, which is not favorable for thinning the speaker 100. Based on this, optionally, the second ratio K2K2 is greater than or equal to 0.15 and less than or equal to 0.55.

More specifically, the second ratio K2 is greater than or equal to 0.2 and less than or equal to 0.36, so as to ensure the vibration stability of the diaphragm 20 and the vibration system and realize the thinning of the speaker 100.

It is understood that the third ratio K3 represents the amplitude of the voice coil 40 when the diaphragm 20 vibrates at the same vibration amplitude, and if the third ratio K3 is too small, the voice coil 40 is too close to the outer edge of the diaphragm 20, and the amplitude of the voice coil 40 is too small, so that the thickness of the speaker 100 cannot be effectively reduced. If the third ratio K3 is too large, the voice coil 40 is too close to the inner edge of the elastic connection portion 22 (i.e., the outer edge of the cone portion 21), and the installation space of the central magnetic circuit of the magnetic circuit system is greatly compressed, which is not favorable for the design of the magnetic circuit system and the improvement of the acoustic performance of the speaker 100. Therefore, optionally, the third ratio K3 is greater than or equal to 0.55 and less than or equal to 0.85.

More specifically, the third ratio K3 may be greater than or equal to 0.6 and less than or equal to 0.7, so as to further thin the speaker 100 while ensuring the acoustic performance of the speaker 100.

It should be noted that, the above relationship between the second ratio K2 and the third ratio K3 is closely related, and the magnitude of the second ratio K2 affects the third ratio K3.

Optionally, the ratio between the third distance D1 and the fourth distance D2 is golden ratio (i.e., 0.618), and the ratio between the fourth distance D2 and the fifth distance D (i.e., the third ratio K3) is golden ratio. Thus, the acoustic performance of the speaker 100 can be improved, and the speaker 100 can be thinned to a greater extent.

Optionally, the ratio of the distance between the inner edge of the elastic connecting portion 22 (i.e. the outer edge of the cone portion 21) and the outer edge of the elastic connecting portion 22 to the five distance D is also golden ratio.

According to the above structural arrangement, the maximum amplitude of the voice coil 40 can be made greater than or equal to 2 mm and less than or equal to 4 mm to achieve a large amplitude output of the speaker 100. More specifically, the maximum amplitude of the voice coil 40 may be greater than or equal to 2.5 mm and less than or equal to 3 mm.

According to the above structural arrangement, the overall thickness of the loudspeaker 100 can be made greater than or equal to 7 mm and less than or equal to 12 mm, so as to realize an ultra-thin design of the loudspeaker 100. More specifically, the overall thickness of the speaker 100 may be greater than or equal to 8 mm and less than or equal to 10 mm, so as to further realize the slim design of the speaker 100.

Further, as shown in fig. 7, one end of the damper 30 is connected to the bottom of the cone 21, and the other end is connected to the magnetic circuit system. So, through connecting bullet ripples 30 in the bottom of tapered basin portion 21, can make bullet ripples 30 more effective prevent that vibrating diaphragm 20 from rocking at the in-process of vibration to improve vibrating diaphragm 20 and vibration system's vibration stability betterly.

In the specific embodiment, as shown in fig. 7, 9-12, the configuration of the magnetic circuit system is many, and the following description will be given by way of example in connection with the formation of the magnetic circuit gap 1 and the cone vibration space 2; the structural form of the magnetic circuit system includes, but is not limited to, the following.

Further, as shown in fig. 6 to 8, the magnetic circuit system includes a first magnetic conductive member 50 and a central magnetic circuit, the first magnetic conductive member 50 includes a first base plate 51 and first magnetic conductive protrusions 52 protruding from a surface of the first base plate 51 and distributed in an annular shape, the central magnetic circuit is disposed inside the first magnetic conductive protrusions 52, the magnetic circuit gap 1 is formed between the central magnetic circuit and the first magnetic conductive protrusions 52, the cone-shaped vibration space 2 is formed on the central magnetic circuit, and the damper 30 is connected to the central magnetic circuit.

In the present embodiment, the magnetic conductive members (such as the first magnetic conductive member 50, and hereinafter, the second magnetic conductive member 62, the third magnetic conductive member 70, etc.) may be made of a material with good magnetic conductivity, so as to be used for magnetic collection, magnetic conduction, etc.; for example, the magnetic conducting member is made of one or more materials including but not limited to low-carbon steel, pure iron, alloy and the like.

In the present invention, the "first magnetically permeable convex portion 52 distributed in a ring shape" has at least the following two meanings:

1) the first magnetically permeable protrusion 52 is provided in an annular configuration.

2) The first magnetic conduction protruding parts 52 are arranged at intervals, and the plurality of first magnetic conduction protruding parts 52 enclose to form an annular structure.

The following description is similar and can be explained without repeated description.

In the present embodiment, as shown in fig. 6-8, the first magnetic conductive protrusion 52 is provided in an annular structure. So as to simplify the structural design of the magnetic circuit system and enhance the magnetic gathering effect of the magnetic circuit gap 1.

Further, as shown in fig. 6 to 8, the first magnetic conducting member 50 further includes second magnetic conducting protruding portions 53 protruding from the surface of the first substrate 51 and distributed in a ring shape, the second magnetic conducting protruding portions 53 are disposed at intervals inside the first magnetic conducting protruding portions 52, and the first magnetic conducting protruding portions 52 protrude from the second magnetic conducting protruding portions 53.

The central magnetic circuit comprises a second magnetic conduction convex part 53, first magnets 1 distributed in an annular shape, and a second magnetic conduction piece 62 arranged in an annular shape, the second magnetic conduction piece 62 and the first magnets 1 are sequentially stacked on the second magnetic conduction convex part 53, and the first magnets 1 are arranged between the second magnetic conduction piece 62 and the second magnetic conduction convex part 53; a magnetic circuit gap 1 is formed between the second magnetic conductive part 62 and the first magnetic conductive convex part 52, and a cone vibration space 2 is formed on the inner sides of the second magnetic conductive convex part 53, the first magnet 1 and the second magnetic conductive part 62.

In this embodiment, the magnets (such as the first magnet 1, and the second magnet 81 hereinafter) may be sintered from a hard magnetic material, and have the function of providing a constant magnetic field with a certain magnetic induction density, and may be, but not limited to, ferrite magnet, alnico magnet, or ndfeb magnet.

By integrally forming the second magnetic conductive convex portion 53 on the first substrate 51 in this manner, not only the magnetic flux collecting and magnetic conductive effects of the magnetic circuit system can be improved; the corresponding assembly steps can also be reduced, simplifying the installation process of the speaker 100.

In the present embodiment, as shown in fig. 6 to 8, the first magnet 1 is provided in an annular structure, the second magnetically conductive protruding portion 53 is provided in an annular structure, and the second magnetically conductive member 62 is provided in an annular structure.

In this embodiment, as shown in fig. 6 to 8, the outer edge of the cone-shaped portion 21 is located inside the inner edge of the second magnetic conductive member 62 in the projection of the magnetic circuit system on the diaphragm 20.

Of course, in other embodiments, the central magnetic circuit may be provided in other configurations, for example, the second magnetic conductive protrusion 53 may be assembled with the first base plate 51 separately.

Further, as shown in fig. 6 to 8, the inner edge of the first magnet 1 protrudes inwards and laterally from the second magnetic conductive protrusion 53, the elastic wave 30 is connected to the lower surface of the inner edge of the first magnet 1, and the other end of the elastic wave 30 is connected to the cone-shaped basin 21.

In this manner, by attaching the damper 30 to the lower surface of the inner edge of the first magnet 1, the connection strength between the damper 30 and the magnetic circuit system can be conveniently improved, and thus the vibration stability of the damper 30 and the diaphragm 20 can be improved.

Of course, in other embodiments, the damper 30 can also be connected to other positions of the central magnetic circuit, such as the second magnetic conductive member 62 or the second magnetic conductive protrusion 53.

Further, as shown in fig. 6 to 8, the speaker 100 further includes a heat insulator 90, the heat insulator 90 is provided in the magnetic circuit system, and the damper 30 is connected to the heat insulator 90. It can be understood that, when the speaker 100 operates, the temperature of the magnetic circuit system is high, and by providing the thermal insulation member 90 to connect the damper 30 and the magnetic circuit system, the high temperature of the magnetic circuit system can be prevented from affecting the connection strength between the damper 30 and the magnetic circuit system, so that the vibration stability of the damper 30 and the diaphragm 20 can be improved.

Specifically, the heat insulation member 90 is disposed on the central magnetic path; more specifically, the heat insulator 90 is provided on the lower surface of the inner periphery of the first magnet 1, and the damper 30 is connected to the lower surface of the heat insulator 90. Therefore, the high temperature of the first magnet 1 during working can be prevented from damaging the elastic wave 30 and the connection structure between the elastic wave 30 and the first magnet 1, so that the connection stability between the elastic wave 30 and the first magnet 1 can be improved, and the vibration stability of the elastic wave 30 and the vibrating diaphragm 20 can be improved; it is also possible to improve the coupling strength between the damper 30 and the first magnet 1 to improve the vibration stability of the damper 30 and the diaphragm 20.

Further, as shown in fig. 6 to 8, the first substrate 51 is provided with a heat dissipation through hole 511 communicating with the cone vibration space 2, and the speaker 100 further includes a heat dissipation member 512, wherein the heat dissipation member 512 is hermetically connected to the heat dissipation through hole 511.

Specifically, the heat dissipation member 512 may be made of a material with good thermal conductivity (e.g., silver, copper, aluminum, or silicon), so as to dissipate heat quickly.

So, through setting up heat dissipation spare 512 with sealed heat dissipation through-hole 511, not only can form confined space with awl basin vibration space 2 etc. in speaker 100 to make vibrating diaphragm 20 and play ripples 30 move in this confined space, thereby can avoid voice coil 40 to sway, wipe circle scheduling problem effectively, can also dispel the heat fast through heat dissipation spare 512, in order to avoid speaker 100 interior high temperature.

Optionally, the size of the heat dissipation through hole 511 is larger than the size of the inner diameter of the second magnetic conductive protrusion 53, so that an inner circular hole in the middle of the second magnetic conductive protrusion 53 is disposed at the bottom of the heat dissipation through hole 511, so as to facilitate installation of the heat sink 512.

Optionally, the surface of the heat dissipation member 512 away from the cone vibration space 2 is provided with a heat dissipation structure, so that the heat dissipation speed can be further increased.

Further, as shown in fig. 6-8, the outer edge of the first substrate 51 protrudes outward from the first magnetic conductive protrusion 52; the bottom of the bracket 10 is connected to the outer edge of the first substrate 51. In this way, it is not necessary to add a special connecting structure to the bracket 10 to connect with the magnetic circuit system.

Referring to fig. 3, the bracket 10 includes a bottom plate 11 and a surrounding plate 12 protruding from the surface of the bottom plate 11, the bottom plate 11 is provided with an installation through hole 111, the first magnetic conductive member 50 is disposed in the installation through hole 111, the bottom plate 11 is connected to the upper surface of the outer edge of the first substrate 51, and the elastic connection portion 22 is connected to the surrounding plate 12. Thus, on the basis of facilitating the connection between the bracket 10 and the first magnetic conductive member 50, the connection strength between the bracket 10 and the first magnetic conductive member 50 can be increased, so as to improve the overall stability of the loudspeaker 100.

It can be understood that, since the voice coil 40 is connected to the inner side of the elastic connection portion 22, the outer edge of the elastic connection portion 22 must protrude outward from the first magnetic conductive protrusion 52, and in order to fix the elastic connection portion 22 and facilitate the vibration of the elastic connection portion 22, a certain preset distance may be provided between the enclosure 12 and the first magnetic conductive protrusion 52, and the certain preset distance may be determined according to the connection position of the voice coil 40 on the elastic connection portion 22, the radial size of the edge 24, and the like, that is, the radial sizes of the support 10 and the speaker 100 need to be increased to achieve the reduction of the thickness of the speaker 100.

In one implementation, the speaker 100 generally further includes a corrugated rim 24, an inner edge of the corrugated rim 24 is connected to an outer edge of the elastic connecting portion 22, and an outer edge of the corrugated rim 24 is connected to the bracket 10.

In this embodiment, specifically, the support 10 further includes a connecting ring plate 13 formed by bending and extending the upper end of the enclosing plate 12 outwards, the connecting ring plate 13 is an annular connecting plate, and the elastic connecting portion 22 is connected to the upper surface of the connecting ring plate 13. More specifically, the outer edge of the edge ring 24 is connected to the upper surface of the link plate 13. In this way, the connection area of the edge 24 and the bracket 10 can be increased, so as to improve the connection strength and connection stability between the edge 24 and the bracket 10.

Optionally, as shown in fig. 3, the outer edge of the connecting ring plate 13 is provided with an upward folded edge 14 to protect at least the folded ring 24.

Further, as shown in fig. 5 and 7, the voice coil 40 has a lead wire 43, and the lead wire 43 is partially fixed to the lower surface of the elastic connection portion 22. In this manner, the lead wire 43 can be made to vibrate together with the diaphragm 20 to reduce the influence of the lead wire 43 on the vibration of the voice coil 40 and the diaphragm 20, so as to further improve the vibration stability of the voice coil 40 and the diaphragm 20.

Alternatively, the voice coil 40 includes a voice coil bobbin 41 and a coil 42 wound around a portion of the voice coil bobbin 41, the upper end of the voice coil bobbin 41 is connected to the elastic connection portion 22, and the coil 42 is disposed in the magnetic circuit gap 1. More specifically, as shown in fig. 7, the coil 42 has a lead 43, and one end of the lead 43 near the voice coil 40 is extended upward and disposed on the surface of the voice coil bobbin 41.

When the voice coil 40 is connected to the elastic connection portion 22, one end of the lead 43 near the voice coil 40 may be extended outward and disposed on the lower surface of the elastic connection portion 22, so that the lead 43 is partially fixed on the lower surface of the elastic connection portion 22.

Alternatively, as shown in fig. 5 and 7, the leads 43 have two, and the two leads 43 are symmetrically disposed on both sides of the voice coil 40.

Specifically, as shown in fig. 7, a terminal 15 is further disposed on the bracket 10, and the lead 43 is electrically connected to the terminal 15.

Alternatively, two connection terminals 15 are symmetrically disposed on the support 10, and the two connection terminals 15 are electrically connected to the two leads 43 in a one-to-one correspondence.

Specifically, the elastic connection portion 22 is a planar diaphragm structure.

Alternatively, as shown in fig. 4 and 7, the elastic connection portion 22 includes a first annular connection portion 221 and a second annular connection portion 222 that are spaced apart from each other in the extending direction of the center line of the diaphragm 20, the first annular connection portion 221 and the second annular connection portion 222 are connected smoothly, the first annular connection portion 221 is disposed on the outer periphery of the second annular connection portion 222, the first annular connection portion 221 is connected to the support 10, and the second annular connection portion 222 is connected to the outer periphery of the cone portion 21.

Alternatively, as shown in fig. 4 and 7, the first annular connecting portion 221 and the second annular connecting portion 222 are both of a planar diaphragm structure.

Alternatively, as shown in fig. 4 and 7, a plurality of protrusions 23 are distributed on the elastic connection portion 22, so that at least the structural strength of the elastic connection portion 22 is enhanced.

Alternatively, as shown in fig. 4 and 7, a plurality of the raised portions 23 are annularly distributed on the peripheral side of the cone portion 21.

Alternatively, as shown in fig. 4 and 7, the bump portion 23 extends from the inside to the outside, and the bump portion 23 is disposed in a deflected manner.

Alternatively, as shown in fig. 1, 4 and 7, the ridge 23 is provided in an arc shape.

In another embodiment of the present invention, as shown in fig. 9 and 10, the magnetic circuit system includes a third magnetic conductive member 70 and a side magnetic circuit, the third magnetic conductive member 70 includes a second base plate 71 and a ring-shaped magnetic conductive portion 72 protruding from a surface of the second base plate 71, the side magnetic circuit is disposed on a peripheral side of the ring-shaped magnetic conductive portion 72, the magnetic circuit gap 1 is formed between the ring-shaped magnetic conductive portion 72 and the side magnetic circuit, and the cone vibration space 2 is formed inside the ring-shaped magnetic conductive portion 72. Optionally, one end of the damper 30 is connected to the inner side wall of the annular magnetic conductive portion 72, and the other end is connected to the bottom of the cone portion 21.

In this embodiment, specifically, as shown in fig. 9 and 10, the side magnetic circuit includes a second magnet 81 and a fourth magnetic conductive member 82, which are annularly distributed, the second magnet 81 and the fourth magnetic conductive member 82 are sequentially stacked on the surface of the second substrate 71, and the second magnet 81 is disposed between the fourth magnetic conductive member 82 and the second substrate 71; a magnetic gap 1 is formed between the annular magnetic conductive part 72 and the fourth magnetic conductive member 82.

In this embodiment, optionally, an inner connecting portion (not shown) is protruded from an inner side wall of the annular magnetic conductive portion 72, and the damper 30 is connected to a lower surface of the inner connecting portion.

In this embodiment, optionally, a thermal insulator 90 may also be provided between the damper 30 and the annular magnetically permeable portion 72. More specifically, the heat insulation member 90 may be disposed on a lower surface of the inner connection portion; alternatively, the heat insulator 90 may be directly connected to the inner surface of the annular magnetic conductive part 72 without providing the inner connecting part, and then the heat insulator 90 may be connected to the damper 30.

In this embodiment, as shown in fig. 9 and 10, the heat dissipation through hole 511 is opened on the second substrate 71 to communicate with the cone vibration space 2, and the heat dissipation member 512 is hermetically connected to the heat dissipation through hole 511. In this embodiment, the heat dissipating through hole 511 is optionally a stepped hole to facilitate mounting of the heat dissipating member 512.

In this embodiment, the structure of the bracket 10 is substantially the same as that of the previous embodiment, for example, the bracket 10 includes a bottom plate 11, a surrounding plate 12, a connecting ring plate 13, a folded edge 14, and the like, and detailed description is not necessary here.

It should be noted that, in this embodiment, the connection relationship between the bracket 10 and the magnetic circuit system is changed adaptively; specifically, as shown in fig. 9 and 10, the annular magnetic conductive portion 72 is mounted in the mounting through hole 111 of the bottom plate 11, the outer edge of the second substrate 71 protrudes outward from the annular magnetic conductive portion 72, and the bottom plate 11 is connected to the upper surface of the outer edge of the second substrate 71.

In another embodiment of the present invention, the difference between the present embodiment and the other embodiment of the present invention is that in this embodiment, a fifth magnetic conductive member 73 is further disposed at the upper end of the annular magnetic conductive portion 72.

That is, in this embodiment, as shown in fig. 11 and 12, the magnetic circuit system includes a third magnetic conductive member 70, a fifth magnetic conductive member 73, and a side magnetic circuit, where the third magnetic conductive member 70 includes a second substrate 71 and an annular magnetic conductive portion 72 protruding from a surface of the second substrate 71, the side magnetic circuit is disposed on a peripheral side of the annular magnetic conductive portion 72, the fifth magnetic conductive member 73 is annularly disposed at an upper end of the annular magnetic conductive portion 72, the magnetic circuit gap 1 is formed between the fifth magnetic conductive member 73 and the side magnetic circuit, and the conical basin vibration space 2 is formed inside the annular magnetic conductive portion 72 and the fifth magnetic conductive member 73.

In this embodiment, as shown in fig. 11 and 12, optionally, an inner edge of the fifth magnetic conductive member 73 protrudes inward and laterally from the annular magnetic conductive portion 72, one end of the damper 30 is connected to a lower surface of the inner edge of the fifth magnetic conductive member 73, and the other end of the damper 30 is connected to the cone-shaped basin portion 21.

In this embodiment, as shown in fig. 11 and 12, a thermal insulator 90 may optionally be provided between the damper 30 and the magnetic circuit system. More specifically, the thermal insulation member 90 may be disposed on a lower surface of an inner edge of the fifth magnetic conduction member 73.

In this embodiment, as shown in fig. 11 and 12, alternatively, the structure of the side magnetic circuit and the bracket 10 is substantially the same as that of the previous embodiment, for example, the side magnetic circuit includes the second magnet 81, the fourth magnetic conductive member 82, and the like; the support 10 comprises a bottom plate 11, a coaming 12, a connecting annular plate 13, a folded edge 14 and the like; and need not be described in detail herein.

It should be noted that the speaker 100 in the present invention can bear large power, and the power of the speaker can reach more than 15W; and the loudspeaker 100 is ultra-thin, high in sensitivity and low in resonant frequency.

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

Wherein the audio device can be selected from a liquid crystal display, a television or the like

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, comprising:

a support;

the vibration system comprises a vibration diaphragm, an elastic wave and a voice coil, the vibration diaphragm comprises a cone part and an elastic connecting part connected to the periphery of the cone part, the outer edge of the elastic connecting part is connected to the support, the bottom of the cone part is arranged in the cone vibration space, and the elastic wave is connected with the cone part and the magnetic circuit system; one end of the voice coil is connected to the elastic connecting part, and the other end of the voice coil extends into the magnetic circuit gap; a preset annular area is arranged between the inner edge and the outer edge of the elastic connecting part, and the voice coil is connected in the preset annular area;

in a cross section passing through the center line of the diaphragm, a third distance D1 is arranged between the inner edge of the elastic connecting part and the center line of the diaphragm, a fourth distance D2 is arranged between the connecting position of the voice coil and the elastic connecting part and the center line of the diaphragm, a fifth distance D is arranged between the outer edge of the elastic connecting part and the center line of the diaphragm, and a second ratio is arranged between the third distance D1 and the fifth distance D, wherein the second ratio is greater than or equal to 0.15 and smaller than 0.55; a third ratio is provided between the fourth distance D2 and the fifth distance D, the third ratio being greater than or equal to 0.55 and less than or equal to 0.85; the third ratio is greater than the second ratio.

2. The speaker of claim 1, wherein, in a cross section passing through a center line of the diaphragm, a first distance D4 is provided between a connection position of the voice coil and the elastic connection portion and an inner edge of the elastic connection portion, a second distance D3 is provided between the inner edge and an outer edge of the elastic connection portion, and the first distance D4 and the second distance D3 have a first ratio, the first ratio being greater than or equal to 0.3 and less than or equal to 0.7.

3. The loudspeaker of claim 1, wherein the overall thickness of the loudspeaker is greater than or equal to 7 mm and less than or equal to 12 mm.

4. The loudspeaker of claim 1, wherein one end of the damper is connected to the bottom of the cone portion, and the other end is connected to the magnetic circuit system.

5. The loudspeaker according to any one of claims 1 to 4, wherein the magnetic circuit system comprises a first magnetic conductive member and a central magnetic circuit, the first magnetic conductive member comprises a first substrate and a first magnetic conductive protrusion protruding from a surface of the first substrate and distributed in a ring shape, the central magnetic circuit is disposed inside the first magnetic conductive protrusion, the magnetic circuit gap is formed between the central magnetic circuit and the first magnetic conductive protrusion, and a middle portion of the central magnetic circuit forms the cone vibration space.

6. The loudspeaker of claim 5, wherein the first magnetic conductive member further comprises a second magnetic conductive protrusion protruding from the surface of the first substrate and annularly disposed on the first substrate, the second magnetic conductive protrusion being disposed inside the first magnetic conductive protrusion, the first magnetic conductive protrusion protruding from the second magnetic conductive protrusion;

7. The loudspeaker of claim 6, wherein the inner edge of the first magnet projects inwardly and laterally from the second magnetically conductive protrusion, the damper is attached to a lower surface of the inner edge of the first magnet, and the other end of the damper is attached to the cone.

8. The speaker of claim 7, further comprising a thermal insulator disposed on a lower surface of the inner rim of the first magnet, the damper being attached to the lower surface of the thermal insulator.

9. The speaker as claimed in claim 5, wherein the first substrate is formed with a heat dissipating through hole communicating with the cone vibration space, and the speaker further comprises a heat dissipating member hermetically connected to the heat dissipating through hole.

10. The speaker of claim 5, wherein an outer edge of said first substrate projects outwardly from said first magnetically permeable projection; the support comprises a bottom plate and a surrounding plate which is convexly arranged on the surface of the bottom plate, the bottom plate is provided with a mounting through hole, the first magnetic conduction piece is arranged in the mounting through hole, and the bottom plate is connected to the upper surface of the outer edge of the first substrate.

11. The loudspeaker according to any one of claims 1 to 4, wherein the magnetic circuit system includes a third magnetic conductive member and a side magnetic circuit, the third magnetic conductive member includes a second substrate and a ring-shaped magnetic conductive portion protruding from a surface of the second substrate, the side magnetic circuit is disposed on a peripheral side of the ring-shaped magnetic conductive portion, the ring-shaped magnetic conductive portion and the side magnetic circuit form the magnetic circuit gap therebetween, and the inside of the ring-shaped magnetic conductive portion forms the cone vibration space.

12. The loudspeaker of claim 11, wherein the side magnetic circuit comprises a second magnetic body and a fourth magnetic conductive member, the second magnetic body and the fourth magnetic conductive member are annularly distributed, the second magnetic body and the fourth magnetic conductive member are sequentially stacked on the surface of the second substrate, and the second magnetic body is arranged between the fourth magnetic conductive member and the second substrate; the annular magnetic conduction part and the fourth magnetic conduction part form the magnetic circuit gap.

13. The loudspeaker according to any one of claims 1 to 4, wherein the magnetic circuit system includes a third magnetic conductive member, a fifth magnetic conductive member, and a side magnetic circuit, the third magnetic conductive member includes a second substrate and a ring-shaped magnetic conductive portion protruding from a surface of the second substrate, the side magnetic circuit is disposed on a peripheral side of the ring-shaped magnetic conductive portion, the fifth magnetic conductive member is annularly disposed on an upper end of the ring-shaped magnetic conductive portion, the fifth magnetic conductive member and the side magnetic circuit form the magnetic circuit gap therebetween, and an inner side of the ring-shaped magnetic conductive portion and an inner side of the fifth magnetic conductive member form the cone vibration space;

14. The speaker according to any one of claims 1 to 4, wherein the voice coil has a lead wire, and the lead wire portion is fixed to a lower surface of the elastic connection portion.

15. Audio apparatus, comprising a loudspeaker according to any one of claims 1 to 14.