WO2020220704A1 - Diaphragm, loudspeaker, and loudspeaker module - Google Patents

Abstract

Disclosed in the present invention are a diaphragm, a loudspeaker, and a loudspeaker module, wherein the diaphragm comprises a central part and an annular hanging part which is arranged around the central part and can generate elastic deformation; the central part is of a flat plate structure; the hanging part comprises an inner edge part, an outer edge part, and a deformation part located between the inner edge part and the outer edge part; the inner edge part is fixedly connected to the edge of the central part, and the outer edge part at least comprises a flat plate edge part in the same extending direction as the central part; the deformation part is of a flat plate structure having the extending direction the same as that of the central part, or the deformation part is of a structure which deviates from the horizontal center line of the edge part of the flat plate and protrudes upwards and/or protrudes downwards by not more than 0.2 mm. The technical solutions of the present invention can reduce the height of the loudspeaker.

Description

Diaphragm, speaker and speaker module Technical field

The present invention relates to the technical field of sound energy conversion, in particular to a diaphragm, a speaker and a speaker module.

Background technique

As shown in Figure 1, the diaphragm 10' of the existing loudspeaker is usually a non-planar diaphragm such as a convex folding ring diaphragm or a concave folding ring diaphragm, that is, this type of diaphragm 10' has a larger folding ring portion 11', the setting of the folding ring part is to ensure that this kind of diaphragm has good vibration performance to meet the sound demand. Generally, in order to obtain a larger displacement of the diaphragm, the concave-convex height of the folding ring portion 11' of this type of diaphragm needs to be larger, which leads to the speaker size (height) is too large; further, in the speaker module structure, the speaker The space in the module housing is divided into a front acoustic cavity and a rear cavity. The diaphragm side is the front acoustic cavity. The front acoustic cavity is further connected with the sound outlet to export the sound to the external environment. The above-mentioned folding ring makes the front acoustic cavity smaller and more shaped Irregularities reduce the fluency of the airflow in the front acoustic cavity and aggravate the generation of airflow sound. In addition, the asymmetry of the diaphragm stiffness coefficient will increase the distortion of the speaker.

Summary of the invention

The main purpose of the present invention is to provide a diaphragm, which aims to reduce the height of the speaker.

In order to achieve the above-mentioned object, the present invention proposes a diaphragm. The diaphragm includes a central portion and an annular suspension portion that can be elastically deformed and arranged around the central portion;

The central part is a flat structure;

The suspension portion includes an inner edge portion, an outer edge portion, and a deformed portion located between the inner edge portion and the outer edge portion. The inner edge portion is fixedly connected to the edge of the center portion, and the outer edge portion is at least Comprising an edge portion of the flat plate that extends in the same direction as the central portion;

The deformed portion is a flat plate structure that extends in the same direction as the central portion, or the deformed portion is a structure that deviates from the horizontal center line of the edge portion of the flat plate and protrudes upward and/or downward by no more than 0.2 mm .

Optionally, the deformed portion includes a plurality of annular protrusions, and the plurality of annular protrusions are sequentially connected in a direction in which the central portion points to the suspension portion, and the annular protrusions are convex relative to the edge portion of the flat plate. Out of settings.

Optionally, the protrusion directions of the two adjacent annular protrusions relative to the edge of the flat plate are opposite.

Optionally, the deformed portion is a corrugated structure that deviates from the horizontal center line of the edge portion of the flat plate and protrudes upward and downward by less than 0.1 mm.

Optionally, the suspension part is made of a material with a Young's modulus less than or equal to 50 Mp.

Optionally, the material of the suspension part is TPEE, TPU or silica gel.

The present invention also provides a speaker. The speaker includes a single housing and a vibration system accommodating and fixed to the single housing. The vibration system includes a diaphragm. The diaphragm includes a central portion and is arranged around the central portion. The ring-shaped suspension that can produce elastic deformation;

The central part is a flat structure;

The suspension portion includes an inner edge portion, an outer edge portion, and a deformed portion located between the inner edge portion and the outer edge portion. The inner edge portion is fixedly connected to the edge of the center portion, and the outer edge portion is at least Comprising an edge portion of the flat plate that extends in the same direction as the central portion;

The deformed portion is a flat plate structure that extends in the same direction as the central portion, or the deformed portion is a structure that deviates from the horizontal center line of the edge portion of the flat plate and protrudes upward and/or downward by no more than 0.2 mm .

Optionally, the speaker further includes an elastic ring, the elastic ring is fixed to the single housing and extends along the circumference of the single housing, and the outer edge of the diaphragm is fixed to the elastic ring .

Optionally, the loudspeaker includes two elastic rings arranged in a stack, and the outer edge portion is clamped between the two elastic rings.

Optionally, the material of the elastic ring is TPEE, TPU or silica gel.

The present invention also provides a speaker module, including a module housing, the module housing including a top wall, a bottom wall and a side wall connecting the top wall and the bottom wall, the side wall is provided with a sound outlet, and The speaker includes the above-mentioned speaker, the diaphragm of the speaker is spaced from the top wall to form a front sound cavity, and the front sound cavity is in communication with the sound outlet.

In the present invention, by replacing the original convex diaphragm with a planar diaphragm or an approximately planar diaphragm, since the height of the planar or approximately planar diaphragm is small, the overall speaker can be effectively reduced. Height, increase the vibration area of the diaphragm. In addition, since the folding ring is replaced, the influence of the height of the folding ring on the airflow in the speaker module can be greatly reduced, the airflow fluency of the front acoustic cavity is enhanced, and the influence of airflow sound on the sound quality is reduced; and the existing diaphragm can be improved The asymmetry of the stiffness coefficient reduces the harmonic distortion of the speaker.

Description of the drawings

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

Figure 1 is a schematic diagram of the structure of an existing diaphragm;

Fig. 2 is a schematic structural diagram of an embodiment of a diaphragm of the present invention;

Fig. 3 is a schematic structural diagram of another embodiment of the diaphragm of the present invention;

4 is a schematic cross-sectional view of an embodiment of a speaker and a speaker module of the present invention;

Figure 5 is an enlarged view of A in Figure 4;

FIG. 6 is a schematic diagram of the structure of the speaker in FIG. 4;

Fig. 7 is an exploded schematic diagram of the speaker in Fig. 6;

Fig. 8 is a schematic cross-sectional view of another embodiment of a speaker and a speaker module of the present invention;

Figure 9 is an enlarged view of B in Figure 8;

FIG. 10 is a schematic diagram of the structure of the speaker in FIG. 8;

Fig. 11 is an exploded schematic diagram of the speaker in Fig. 10;

FIG. 12 is a schematic cross-sectional view of another embodiment of a speaker and a speaker module of the present invention;

Figure 13 is an enlarged view of C in Figure 12;

FIG. 14 is a schematic diagram of the structure of the speaker in FIG. 12;

Fig. 15 is an exploded schematic diagram of the speaker in Fig. 14.

Description with icon number:

Label	name	Label		name
10/10＇	Diaphragm	52	Central magnetic plate
11	Center	61	Side magnet

12	Deformation part	62	Edge magnetic plate
121	Ring bump	70	Elastic ring
13	Inner edge	81	Top wall
14	Outer edge	82	Bottom wall
15	Top of the ball	83	Pre-voice
11'		Fold	84	Back cavity
20	Monocoque	85	Sound outlet
30	Voice coil	86	Dust net
40	Magnetic yoke	87	Steel sheet
51	Center magnet	To	To

The realization of the objectives, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

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

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

The present invention provides a diaphragm, which can be applied to speakers.

2 and 3 in combination, in the embodiment of the present invention, the diaphragm 10 includes a central portion 11, a suspension portion arranged around the central portion 11, the central portion 11 is a flat plate structure, the suspension portion is ring-shaped, and can produce elastic deformation . The suspension portion includes an inner edge portion 13, an outer edge portion 14, and a deformable portion 12 located between the inner edge portion 13 and the outer edge portion 14. The inner edge portion 13 is fixedly connected to the edge of the central portion 11 The outer edge portion 14 at least includes a flat plate edge portion that extends in the same direction as the central portion 11. The deformed portion 12 is a flat plate structure with the same extending direction as the central portion, or the deformed portion 12 deviates from the horizontal center line of the edge of the flat plate and protrudes upward and/or downward by no more than 0.2 mm Structure.

Wherein, a dome 15 (as shown in FIG. 15) is usually provided on the central part 11 to adjust the acoustic performance. The inner edge portion 13 has the effect of connecting the central portion 11 and the deformed portion 12, and the outer edge portion 14 serves as a fixing portion for fixing with other components of the speaker. The deformable portion 12 refers to the portion of the diaphragm 10 that can be deformed by vibrating up and down, that is, the folding ring portion 11 ′ in the traditional diaphragm 10 ′ is replaced by the deforming portion 12.

As shown in FIG. 2, in one embodiment, the diaphragm 10 is a flat plate structure, that is, the central portion 11 and the suspension portion are both flat plate structures, specifically, the deformed portion 12 is a flat plate structure with the same extending direction as the central portion 11 There is no need to provide a concave or convex fold ring on the diaphragm 10.

As shown in FIGS. 3 and 9, in one embodiment, the deformed portion 12 is a structure that deviates from the horizontal center line of the edge of the flat plate and protrudes upward and/or downward by no more than 0.2 mm. In this embodiment, at least a part of the deformable portion 12 is arranged to protrude relative to the horizontal center line of the edge of the flat plate, and the height of the protrusion relative to the horizontal center line of the edge of the flat plate is less than or equal to 0.2 mm. Specifically, in an embodiment, a part of the deformed portion 12 is set to protrude upward relative to the horizontal center line of the edge of the plate, and another part of the deformed portion 12 is set to protrude downward relative to the horizontal center line of the edge of the plate. On the upper and lower surfaces of the edge portion of the flat plate, protrusions are formed, and the deformed portion 12 is specifically formed in a wave shape, a rectangular wave shape or a triangular wave shape. In one embodiment, the deformed portion 12 protrudes upwards in whole or in part relative to the horizontal center line of the edge of the flat plate, and only a protrusion is formed on the upper surface of the edge of the flat plate. In one embodiment, the deformed portion 12 protrudes downwardly or partially relative to the horizontal center line of the edge of the flat plate, and only a protrusion is formed on the lower surface of the edge of the flat plate. In the above, there may be one or more protrusions formed. In addition, since the protrusion height of the deformed portion 12 deviating from the horizontal center line of the edge portion of the flat plate does not exceed 0.2mm, for example, the protrusion height can be 0.2mm, 0.1mm or 0.08mm, etc., and the protrusion height is relatively small. Therefore, the diaphragm can be regarded as an approximately planar structure, and the overall height of the diaphragm of this structure is small.

In the present invention, by replacing the original convex diaphragm with a planar diaphragm 10 or an approximately planar diaphragm 10, since the height of the planar or approximately planar diaphragm 10 is small, it can be effectively reduced The overall height of the speaker increases the vibration area of the diaphragm 10.

Please refer to FIGS. 3 and 9 in combination again. In one embodiment, the connecting portion 12 includes a plurality of annular protrusions 121, and the plurality of annular protrusions 121 are sequentially connected in a direction in which the central portion 11 points to the suspension portion, and the annular protrusions 121 It is arranged protrudingly from the plane where the edge of the flat plate is located. Specifically, the plurality of annular protrusions 121 may all be arranged on the same side of the diaphragm 10, or a part of the annular protrusion 121 is arranged on one side of the diaphragm 10, and another part of the annular protrusion 121 is arranged on the other side of the diaphragm 10. side.

In an embodiment, the protrusion directions of two adjacent annular protrusions 121 relative to the plane where the edge of the flat plate is located are opposite. Optionally, the deformed portion 12 is a wavy structure that deviates from the horizontal center line of the edge portion of the flat plate and protrudes upward and downward by less than 0.1 mm. In this embodiment, since the connecting portion 12 is formed with annular protrusions 121 in the vertical direction relative to the plane where the edge of the plate is located, and the annular protrusions 121 on the upper and lower sides are evenly distributed, the annular protrusions on the upper and lower sides are evenly distributed. The distribution and number of the ridges 121 are roughly the same, so the height of the diaphragm 10 when vibrating upward and downward is roughly the same, and the overall balance is better.

If the protrusion height of the annular protrusion 121 is too large, the overall height of the speaker will be too large. Therefore, in one embodiment, the protrusion height of the annular protrusion 121 relative to the plane where the edge of the plate is located is less than or equal to 0.1 mm, for example, an annular The protrusion height of the protrusion 121 relative to the plane where the edge of the flat plate is located is 0.1mm, 0.08mm or 0.05mm.

In an embodiment, the suspension part is made of a material with a Young's modulus less than or equal to 50 Mp. Specifically, the Young's modulus of the suspension portion is 50 MPa, 40 MPa, 10 MPa, etc., and this type of diaphragm 10 can undergo greater elastic deformation. For example, the material of the diaphragm 10 can be any one of TPEE (thermoplastic polyester elastomer), TPU (polyurethane thermoplastic elastomer), or silicone.

In the present invention, by replacing the original convex diaphragm 10 with a highly elastic diaphragm 10, since the Young’s modulus of the highly elastic diaphragm 10 is less than or equal to 50 MPa, that is, it has better elasticity, so a flat one can be used. The deformed portion 12 or the deformed portion 12 composed of a plurality of annular protrusions 121 replaces the folded ring portion 11' in the traditional diaphragm 10', and the height of the annular protrusion 121 can be set to be smaller, so it can be effectively reduced The overall height of the speaker increases the vibration area of the diaphragm 10.

Please refer to Figure 4, the present invention also provides a speaker, the speaker includes a vibration system and a magnetic circuit system, the magnetic circuit system is used to provide electromagnetic driving force for the vibration system, the vibration system includes a diaphragm 10 and fixed on the diaphragm 10 On one side of the voice coil 30, the diaphragm 10 is the above-mentioned diaphragm 10. Since this speaker adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. I will not repeat them here.

Please refer to FIG. 5 in combination. Further, the speaker further includes an auxiliary system. The auxiliary system includes a single housing 20, which is used to house the fixed vibration system and the magnetic circuit system. The magnetic circuit system includes a magnetic yoke 40 fixed to the single housing 20. The magnetic yoke 40 is provided with an inner magnetic circuit part and an outer magnetic circuit part, and a magnetic gap for accommodating the voice coil 30 is formed between the two. Among them, in one case, the inner magnetic circuit part includes a central magnet 51 arranged at the center of the magnetic yoke 40 and a central magnetic plate 52 arranged on the central magnet 51, and the outer magnetic circuit part includes a central magnet arranged on the magnetic yoke 40. The side magnet 61 at the edge position of, and the side magnetic guide plate 62 provided on the side magnet 61.

Please refer to FIGS. 4 to 11 in combination, in which FIGS. 4 to 7 show that the outer edge 14 of the planar diaphragm 10 is fixed to the single housing 20, and FIGS. 8 to 11 show the outer edge of the wave-shaped diaphragm 10 The edge portion 14 is fixed to the unit case 20. In one embodiment, the outer edge portion 14 of the diaphragm 10 is fixed to the single housing 20. Specifically, the outer edge portion 14 can be bonded to the single housing 20, and the deformed portion 12 of the diaphragm 10 is suspended from the single housing 20. 20 to ensure that the central portion 11 of the diaphragm 10 can vibrate and produce sound.

12-15, in one embodiment, the speaker further includes an elastic ring 70, the elastic ring 70 is fixed to the single housing 20, and extends along the circumference of the single housing 20, the outer edge of the diaphragm 10 14 is fixed to the elastic ring 70, that is, the elastic ring 70 extends along the circumferential direction of the diaphragm 10. Specifically, the outer edge portion 14 and the elastic ring 70 are adhesively fixed, or the outer edge portion 14 and the elastic ring 70 are heat-melted and fixed. In addition, the material of the elastic ring 70 is TPEE (thermoplastic polyester elastomer), TPU (polyurethane thermoplastic elastomer) or silicone. The elastic ring 70 can be made of the same material as the diaphragm 10, so the vibration consistency is better. . In this embodiment, by providing the elastic ring 70, since the elastic ring 70 has elasticity, the elasticity of the diaphragm 10 can be compensated, so that the vibration effect of the diaphragm 10 is better. In addition, the width of the elastic ring 70 is less than or equal to the width of the outer edge portion 14. The elastic ring 70 fixes the diaphragm 10 and only contacts the outer edge portion 14 without blocking the deformed portion 12, which can avoid elasticity. The ring 70 hinders the movement of the deformed portion 12, so the vibration effect of the diaphragm 10 is not weakened.

In one embodiment, the loudspeaker includes two elastic rings 70 stacked on top of each other. The outer edge portion 14 is clamped between the two elastic rings 70. One elastic ring 70 is fixed to the single housing 20, and the other elastic ring 70 is laminated. On the elastic ring 70 fixed to the single housing 20. Since elastic rings 70 are provided on both the upper and lower surfaces of the diaphragm 10, the elasticity of the diaphragm 10 can be compensated in both the upper and lower directions, so it has better symmetry.

In one embodiment, the outer peripheral surface of the elastic ring 70 is flush with the outer peripheral surface of the single housing 20, which can prevent the elastic ring 70 from exceeding the outside of the single housing 20 and occupying too much space in the whole machine.

Please refer to Figure 4, Figure 8 and Figure 12 again, the present invention also provides a speaker module, including a module housing, the module housing includes a top wall 81, a bottom wall 82 and connecting the top wall 81 and the bottom wall 82 A sound outlet 85 is provided on the side wall. The top wall 81, the bottom wall 82 and the side wall enclose a housing cavity. The above-mentioned speaker is placed in the housing cavity, and the housing cavity is divided into the front The acoustic cavity 83 and the rear acoustic cavity 84. Specifically, the diaphragm 10 of the speaker and the top wall 81 are spaced apart to form a front acoustic cavity 83. The front acoustic cavity 83 is connected with the sound outlet 85, and the sound outlet 85 is covered with a dust-proof net 86. Prevent dust from entering the front acoustic cavity 83. In order to ensure the strength of the top wall 81, an opening can be opened in the area of the top wall 81 facing the diaphragm 10, and the opening is covered by a steel sheet 87, which is fixed to the top wall 81, and because The steel sheet 87 is relatively thin, so it can increase the space of the front acoustic cavity 83 relative to the entire top wall 81.

The diaphragm 10 of the aforementioned speaker is the diaphragm 10 in the aforementioned embodiments. Since the speaker module adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments. I will not repeat them here.

Further, since the suspension portion of the diaphragm 10 used in the present invention is a planar structure or a nearly planar structure, instead of the folding ring portion 11' in the prior art, the height of the folding ring portion 11' can be greatly reduced to the speaker. The influence of the airflow in the module enhances the airflow fluency of the front acoustic cavity, thereby reducing the influence of the airflow sound on the sound quality; and can improve the asymmetry of the stiffness coefficient of the existing diaphragm 10 and reduce the harmonic distortion of the speaker.

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

Claims (11)

1. A diaphragm, characterized in that the diaphragm includes a central portion, and an annular suspension portion that can be elastically deformed and arranged around the central portion;

   The central part is a flat structure;

   The suspension portion includes an inner edge portion, an outer edge portion, and a deformed portion located between the inner edge portion and the outer edge portion. The inner edge portion is fixedly connected to the edge of the center portion, and the outer edge portion is at least Comprising an edge portion of the flat plate that extends in the same direction as the central portion;

   The deformed portion is a flat plate structure that extends in the same direction as the central portion, or the deformed portion is a structure that deviates from the horizontal center line of the edge portion of the flat plate and protrudes upward and/or downward by no more than 0.2 mm .
2. The diaphragm according to claim 1, wherein the deformed portion comprises a plurality of annular protrusions, and the plurality of annular protrusions are connected in sequence in a direction in which the central portion points to the suspension portion, and the The annular protrusion is arranged protrudingly relative to the edge of the flat plate.
3. The diaphragm according to claim 2, wherein the protrusion directions of the two adjacent annular protrusions are opposite to the edge of the flat plate.
4. The diaphragm according to claim 1, wherein the deformed portion is a wave pattern structure that deviates from the horizontal center line of the edge of the flat plate and protrudes upward and downward by less than 0.1 mm.
5. The diaphragm according to claim 1, wherein the suspension part is made of a material with a Young's modulus less than or equal to 50 Mp.
6. The diaphragm according to any one of claims 1 to 5, wherein the material of the suspension part is TPEE, TPU or silica gel.
7. A loudspeaker, characterized in that it comprises a single housing and a vibration system accommodating and fixed to the single housing, the vibration system comprising a diaphragm, the diaphragm being according to any one of claims 1-6 Diaphragm.
8. The speaker according to claim 7, wherein the speaker further comprises an elastic ring, the elastic ring is fixed to the single housing and extends along the circumference of the single housing, and the diaphragm The outer edge portion is fixed to the elastic ring.
9. 8. The loudspeaker according to claim 8, wherein the loudspeaker comprises two elastic rings arranged in a stack, and the outer edge portion is clamped between the two elastic rings.
10. The speaker according to claim 7, wherein the material of the elastic ring is TPEE, TPU or silicone.
11. A speaker module includes a module housing, the module housing includes a top wall, a bottom wall, and a side wall connecting the top wall and the bottom wall. A sound outlet is provided on the side wall, and is characterized in that: The speaker comprises the speaker according to any one of claims 7-10, wherein the diaphragm of the speaker is spaced from the top wall to form a front acoustic cavity, and the front acoustic cavity is in communication with the sound outlet.

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