WO2019128422A1

WO2019128422A1 - Diaphragm and electroacoustic transducer

Info

Publication number: WO2019128422A1
Application number: PCT/CN2018/111778
Authority: WO
Inventors: 李军; 李栋
Original assignee: 歌尔股份有限公司
Priority date: 2017-12-29
Filing date: 2018-10-25
Publication date: 2019-07-04
Also published as: CN108012224B; CN108012224A

Abstract

Embodiments of the present invention provide a diaphragm and an electroacoustic transducer. The diaphragm is rectangular and comprises a middle part and a folding ring part surrounding the periphery of the middle part. The folding ring part comprises two opposite first side parts, two opposite second side parts, and arc-shaped corner parts located between the first side parts and the second side parts; the arc-shaped corner parts form corner areas together with the ends of the first side parts and the ends of the second side parts which are connected to the arc-shaped corner parts; each corner area of the folding ring part is provided with a first pattern group and a second pattern group which are adjacent to each other; each of the first pattern group and the second pattern group comprises a plurality of single patterns; the plurality of single patterns of the first pattern group is provided to diverge from the outer side to the inner side of the folding ring part, and the plurality of single patterns of the second pattern group are provided to diverge from the inner side to the outer side of the folding ring part. The technical solution provided by the embodiments of the present invention enables a diaphragm to meet temperature requirements in different operating modes, has an effective inhibiting effect on harmonic distortion, and can also improve the audition quality and the acoustic performance of an electroacoustic transducer.

Description

Diaphragm and electroacoustic transducer

Technical field

The present invention relates to the field of electroacoustic technology, and in particular to a diaphragm and an electroacoustic transducer.

Background technique

Electroacoustic transducers, such as microspeakers, are an important acoustic component in portable electronic devices that convert acoustic signals into acoustic signals and are an energy conversion device. Electroacoustic transducers typically include a vibrating system and a magnetic circuit system that includes a diaphragm and voice coil that are combined. The diaphragm is an important part of the electroacoustic transducer and determines the quality of the conversion from electrical energy to acoustic energy. At present, the working mode of the electroacoustic transducer is divided into a speaker working mode and a receiver operating mode, and the temperature requirements of the diaphragm are different in the two working modes.

Therefore, most of the current electroacoustic transducers can only work in one working mode when working, and it is difficult to satisfy both working modes at the same time. If the electroacoustic transducer does not meet the temperature requirements of the operating mode, the acoustic tolerance of the electroacoustic transducer is low and the acoustic performance is affected during operation.

Summary of the invention

The embodiment of the invention provides a diaphragm and an electroacoustic transducer to meet the temperature requirements of different working modes by improving the pattern on the ring portion of the diaphragm, thereby improving the electroacoustic transducer using the diaphragm. Listening quality.

In an embodiment of the present invention, a diaphragm is provided, the diaphragm is rectangular, and includes: an intermediate portion and a folded portion surrounding the outer circumference of the intermediate portion;

The folding ring portion includes two opposite first side portions and two opposite second side portions, and a curved corner portion between the first side portion and the second side portion, the arc a corner portion and an end portion of the first side portion and the end portion of the second side portion connected thereto constitute a corner region;

The corner area of the folding ring portion is provided with an adjacent first pattern group and a second pattern group;

The first pattern group and the second pattern group each include a plurality of single patterns;

The plurality of single patterns of the first pattern group are diverging from the outer side of the folding ring portion, and the plurality of single patterns of the second pattern group are outwardly from the inner side of the folding ring portion Divergence settings.

Optionally, a center line of the plurality of single patterns of the first pattern group intersects a point on an outer side of the folding ring portion;

Any two single-pattern center lines of the center lines of the plurality of single patterns of the same group of the second pattern group intersect at a point inside the folding ring portion.

Optionally, the first pattern group is disposed adjacent to the first side portion, and the length of the plurality of single patterns of the first pattern group is from the curved corner portion toward the first side portion Gradually getting longer;

The second pattern group is disposed adjacent to the second side portion, and the plurality of single pattern lengths of the second pattern group are gradually shortened from the curved corner portion toward the second side portion.

Optionally, a center line of the plurality of single patterns of the second pattern group is tangent to a same circle inside the folding ring portion, and the circle is adjacent to the curved corner portion.

Optionally, among the center lines of the plurality of single patterns of the second pattern, all the center lines are equal to the tangent points of the tangent line tangent to the same circle inside the folding portion.

Optionally, among the center lines of the plurality of single patterns of the first pattern group, the angles of all two adjacent center lines are equal.

Optionally, in the width direction of the folding ring portion, the plurality of single patterns of the first pattern group and the plurality of single patterns of the second pattern group have only one row;

Or, in the width direction of the folding ring portion, the plurality of single patterns of the at least one of the first pattern group and the second pattern group are arranged in a plurality of rows;

Or, in a width direction of the folding ring portion, a part of the plurality of single patterns of the at least one of the first pattern group and the second pattern group is arranged in a plurality of rows, and the other portion is arranged in a single row. And the single pattern arranged in a single row is arranged at intervals from the single pattern arranged in a plurality of rows.

Optionally, the first side portion is a long side, and the second side portion is a short side.

Optionally, the first pattern group and the second pattern group form a pattern combination unit;

The pattern combining unit is disposed on each of the four corners of the folding ring portion;

The pattern combining unit on the first corner and the pattern combining unit on the second corner are mirror-symmetrical with respect to the first axis of symmetry;

The pattern combining unit on the second corner and the pattern combining unit on the third corner are mirror-symmetrical with respect to the second axis of symmetry;

The pattern combining unit on the third corner and the pattern combining unit on the fourth corner are mirror-symmetrical with respect to the first axis of symmetry;

Wherein the first axis of symmetry is an axis of symmetry of the diaphragm in a width direction thereof;

The second axis of symmetry is the axis of symmetry of the diaphragm in its length direction.

Optionally, the convex directions of the plurality of single patterns are opposite to the convex direction of the folded portion; or

The convex directions of the plurality of single patterns are the same as the convex direction of the folded portion; or

The plurality of single patterns are arranged in a direction in which the convex directions are the same as and opposite to the convex direction of the folded portion.

Correspondingly, an embodiment of the present invention provides an electroacoustic transducer, comprising the diaphragm of any one of the above.

According to the technical solution provided by the embodiment of the present invention, a novel pattern design scheme is adopted, and adjacent first pattern groups and second pattern groups are disposed in a corner region of the folding ring portion, and the plurality of single patterns of the first pattern group are folded The outer side of the ring portion is diverging toward the inner side, and the plurality of single patterns of the second pattern group are dispersed outward from the inner side of the folded ring portion. By setting the first pattern group, the diaphragm can be made to satisfy an operation mode higher than the normal temperature, and by providing the second pattern group, the diaphragm can be made to satisfy the operation mode at normal temperature. The combination of the first pattern group and the second pattern group enables the diaphragm to meet the temperature requirements of different working modes, effectively suppresses harmonic distortion, and can also improve the listening quality and acoustic performance of the electroacoustic transducer.

DRAWINGS

The accompanying drawings, which are incorporated in FIG.

1 is a schematic structural view of a diaphragm provided by an embodiment of the present invention;

Figure 2 is a partial enlarged view of Figure 1;

FIG. 3 is a schematic structural diagram of an electroacoustic transducer according to an embodiment of the present invention.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques and devices should be considered as part of the specification.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

FIG. 1 and FIG. 2 are schematic diagrams showing the structure of a diaphragm 10 according to an embodiment of the present invention. As shown in Figure 1 and Figure 2.

A diaphragm provided in an embodiment of the present invention has a rectangular diaphragm and includes: an intermediate portion 1 and a folded portion 2 surrounding the outer circumference of the intermediate portion 1.

The folding ring portion 2 includes two opposite first side portions and two opposite second side portions, and a curved corner portion between the first side portion and the second side portion, and the curved corner portion is connected thereto The end of the first side portion and the end of the second side portion constitute a corner area. The corner portion of the loop portion 2 is provided with a first pattern group 3 and a second pattern group 4.

Each of the first pattern group 3 and the second pattern group 4 includes a plurality of single patterns 5.

The plurality of single patterns 5 of the first pattern group 3 are dispersed toward the inner side by the outer side of the folding ring portion 2, and the plurality of single patterns 5 of the second pattern group 4 are dispersed outward from the inner side of the folding ring portion 2.

Here, it is to be noted that the inner side of the folded ring portion 2 is the side connected to the intermediate portion 1, and the side opposite to the inner side of the folded ring portion 2 is the outer side of the folded ring portion 2.

When the diaphragm is operated in an operating mode higher than the normal temperature, the vibration frequency of the outer side of the joint of the corner portion of the folded ring portion 2 and the intermediate portion 1 is large, so that the portion is easily damaged. When the diaphragm is operated in the normal temperature mode of operation, the inner position of the corner portion of the folded ring portion 2 and the intermediate portion 1 vibrate at a large frequency, so that the portion is easily damaged.

Therefore, the technical solution provided by the embodiment of the present invention adopts a novel pattern design scheme, and the adjacent first pattern group 3 and the second pattern group 4 are disposed in the corner area of the folding ring portion 2, and the first pattern group 3 is The plurality of single patterns 5 are dispersed toward the inner side from the outer side of the folded ring portion 2, and the plurality of single patterns 5 of the second pattern group 4 are dispersed outward from the inner side of the folded ring portion 2. The interaction of the first pattern group 3 and the second pattern group 4 enables the diaphragm to meet the temperature requirements of different working modes, effectively suppressing harmonic distortion, and can also improve the listening quality and acoustics of the electroacoustic transducer. Performance, to ensure that the speaker has good performance under two working conditions. In addition, the diaphragm with this structure has high strength, which can effectively reduce the polarization phenomenon of the product.

In an embodiment of the present invention, an achievable manner of the first pattern group 3 and the second pattern group 4 is that, with continued reference to FIG. 1, the center line 6 of the plurality of single patterns 5 of the first pattern group 3 is in the folding portion The outside of 2 is a little bit. That is, the plurality of single patterns 5 of the first pattern group 3 are densely arranged at the outer position of the joint between the corner portion and the intermediate portion 1, and the joint strength at that portion is enhanced.

The center line 6 of any two single patterns 5 in the center line 6 of the plurality of single patterns 5 of the second pattern group 4 of the same group intersects one point inside the folding portion 2. That is, the plurality of single patterns 5 of the second pattern group 4 are densely arranged at the inner side of the joint between the corner portion and the intermediate portion 1, and the joint strength at that place is enhanced.

As shown in FIG. 2, in order to effectively suppress the harmonic distortion more effectively, in the embodiment of the present invention, the first pattern group 3 is disposed near the first side portion, and the first corner portion is curved from the curved corner portion to the first side. In the direction of the portion, the lengths of the plurality of single patterns 5 of the first pattern group 3 gradually become longer. The second pattern group 4 is disposed near the second side portion, and the lengths of the plurality of single patterns 5 of the second pattern group 4 are gradually shortened from the curved corner portion toward the second side portion.

In a specific implementation, the first side portion is a long side, and the second side portion is a short side. Taking the single pattern 5 in the first pattern group 3 as an example, the extending direction of the single pattern 5 of the first pattern group 3 can be obtained by the following method: centering on the preset intersection point outside the folding ring portion 2, according to the preset The angles and the number of single patterns 5 make a plurality of rays to the curved corner portions of the folding ring portion 2, and each of the rays is the center line 6 of a single pattern 5. A single pattern 5 having a length gradually lengthened from the curved corner portion toward the first side portion is formed across the folding ring portion 2 with the ray as the center line 6. With continued reference to FIG. 1, in order to strengthen the joint strength of the inner vibration position of the joint between the corner region of the loop portion 2 and the intermediate portion 1, an achievable manner is that the center line of the plurality of single patterns 5 of the second pattern group 4 6 are each tangent to the same circle inside the loop portion 2, which is near the curved corner portion.

Further, among the center lines 6 of the plurality of single patterns 5 of the second pattern group 4, all the center lines 6 are equal to the tangent points of the tangent point lines tangent to the same circle inside the folded ring portion 2.

In order to strengthen the joint strength of the outer vibration position of the joint of the corner portion of the loop portion 2 and the intermediate portion 1, an achievable manner is that among the center lines 6 of the plurality of single patterns 5 of the first pattern group 3, all two The angles of adjacent centerlines 6 are equal.

In the embodiment of the present invention, the first pattern group 3 and the second pattern group 4 can be set on the folding ring portion 2 according to different applicable environments and requirements. For example, including but not limited to the following:

In the width direction of the loop portion 2, the plurality of single patterns 5 of the first pattern group 3 and the plurality of single patterns 5 of the second pattern group 4 have only one row.

Alternatively, in the width direction of the loop portion 2, the plurality of single patterns 5 of at least one of the first pattern group 3 and the second pattern group 4 are arranged in a plurality of rows.

Alternatively, in the width direction of the loop portion 2, a part of the plurality of single patterns 5 of at least one of the first pattern group 3 and the second pattern group 4 is arranged in a plurality of rows, and the other portion is arranged in a single row, and the single portion The single pattern arranged in a row is spaced apart from the single pattern arranged in a plurality of rows.

In the embodiment of the present invention, the diaphragm is rectangular. Referring to FIG. 1, the first pattern group 3 and the second pattern group 4 form a pattern combination unit.

A pattern combining unit is provided at each of the four corners of the loop portion 2.

The pattern combining unit on the first corner and the pattern combining unit on the second corner are mirror-symmetrical with respect to the first axis of symmetry 7.

The pattern combining unit on the second corner and the pattern combining unit on the third corner are mirror-symmetrical with respect to the second axis of symmetry 8.

The pattern combining unit on the third triangle and the pattern combining unit on the fourth corner are mirror-symmetrical with respect to the first axis of symmetry 7.

The first axis of symmetry 7 is the axis of symmetry of the diaphragm in its width direction. The second axis of symmetry 8 is the axis of symmetry of the diaphragm in its length direction.

Further, the convex directions of the plurality of single patterns 5 are opposite to the convex directions of the folded ring portions 2. or

The convex directions of the plurality of single patterns 5 are the same as the convex directions of the folded ring portions 2. or

In the plurality of single patterns 5, the convex directions are the same as the convex directions of the folded ring portions 2 and the opposite single patterns 5 are arranged at intervals.

Further, FIG. 3 is a schematic structural diagram of an electroacoustic transducer according to an embodiment of the present invention. As shown in Figure 3. An embodiment of the present invention also provides an electroacoustic transducer comprising the diaphragm 10 described above. The structure of the diaphragm 10 can be seen in FIGS. 1 and 2 . The diaphragm 10 has a rectangular shape and includes an intermediate portion 1 and a folded portion 2 surrounding the outer periphery of the intermediate portion 1 .

The folding ring portion 2 includes two opposite first side portions and two opposite second side portions, and a curved corner portion between the first side portion and the second side portion, and the curved corner portion is connected thereto The end of the first side portion and the end of the second side portion constitute a corner area.

The corner area of the loop portion 2 is provided with an adjacent first pattern group 3 and a second pattern group 4.

The plurality of single patterns 5 of the first pattern group 3 are dispersed toward the inner side by the outer side of the folding ring portion 2, and the plurality of single patterns 5 of the second pattern group 4 are dispersed outward from the inner side of the folding ring portion 2. As shown in FIG. 3, the diaphragm 10 is disposed above the voice coil 20, and the voice coil 20 and the diaphragm 10 are disposed on the magnetic circuit system 30. Specifically, the diaphragm 10 in this embodiment can be implemented by the structure provided by the above embodiments (the structure shown in FIGS. 1 and 2).

The technical solution provided by the embodiment provides a diaphragm for designing a new pattern, and the combination of the first pattern group and the second pattern group enables the diaphragm to meet the temperature requirements of different working modes, and effectively suppresses harmonic distortion. At the same time, the listening quality and acoustic performance of the electroacoustic transducer can be improved to ensure good performance of the speaker under two working conditions. In addition, the diaphragm with this structure has high strength, which can effectively reduce the polarization phenomenon of the product.

While the invention has been described in detail with reference to the specific embodiments of the present invention, it should be understood that It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

a diaphragm, the diaphragm is rectangular, and includes: an intermediate portion and a folding portion surrounding the outer circumference of the intermediate portion;

The folding ring portion includes two opposite first side portions and two opposite second side portions, and a curved corner portion between the first side portion and the second side portion, the arc a corner portion and an end portion of the first side portion and the end portion of the second side portion connected thereto constitute a corner region;

The corner area of the folding ring portion is provided with an adjacent first pattern group and a second pattern group;

The first pattern group and the second pattern group each include a plurality of single patterns;

The plurality of single patterns of the first pattern group are diverging from the outer side of the folding ring portion, and the plurality of single patterns of the second pattern group are outwardly from the inner side of the folding ring portion Divergence settings.
The diaphragm according to claim 1, wherein

a center line of the plurality of single patterns of the first pattern group intersecting a point on an outer side of the folding ring portion;

Any two single-pattern center lines of the center lines of the plurality of single patterns of the same group of the second pattern group intersect at a point inside the folding ring portion.
The diaphragm according to claim 1, wherein said first pattern group is disposed adjacent said first side portion, said first pattern group from said curved corner portion toward said first side portion The length of the plurality of single patterns gradually becomes longer;

The second pattern group is disposed adjacent to the second side portion, and the plurality of single pattern lengths of the second pattern group are gradually shortened from the curved corner portion toward the second side portion.
The diaphragm according to any one of claims 1 to 3, wherein a center line of the plurality of single patterns of the second pattern group is tangent to a same circle inside the folding ring portion The circle is near the curved corner portion.
The diaphragm according to claim 4, wherein among the center lines of the plurality of single patterns of the second pattern group, all the center lines are tangent to the same circle inside the folding portion The tangent points of the line are equal.
The diaphragm according to any one of claims 1 to 3, wherein among the center lines of the plurality of single patterns of the first pattern group, the angles of all two adjacent center lines are equal.
The diaphragm according to any one of claims 1 to 3, wherein the plurality of single patterns and the second pattern of the first pattern group in a width direction of the folding ring portion The plurality of single patterns of the group are only one row;

Or, in the width direction of the folding ring portion, the plurality of single patterns of the at least one of the first pattern group and the second pattern group are arranged in a plurality of rows;

Or, in the width direction of the folding ring portion, a part of the plurality of single patterns of the at least one of the first pattern group and the second pattern group is arranged in a plurality of rows, and the other portion is a single row Arranged, and the single pattern arranged in a single row is spaced apart from the single pattern arranged in a plurality of rows.
The diaphragm according to any one of claims 1 to 3, wherein the first side portion is a long side and the second side portion is a short side.
The diaphragm according to any one of claims 1 to 3, wherein the first pattern group and the second pattern group form a pattern combination unit;

The pattern combining unit is disposed on each of the four corners of the folding ring portion;

The pattern combining unit on the first corner and the pattern combining unit on the second corner are mirror-symmetrical with respect to the first axis of symmetry;

The pattern combining unit on the second corner and the pattern combining unit on the third corner are mirror-symmetrical with respect to the second axis of symmetry;

The pattern combining unit on the third corner and the pattern combining unit on the fourth corner are mirror-symmetrical with respect to the first axis of symmetry;

Wherein the first axis of symmetry is an axis of symmetry of the diaphragm in a width direction thereof;

The second axis of symmetry is the axis of symmetry of the diaphragm in its length direction.
The diaphragm according to any one of claims 1 to 3, wherein a convex direction of the plurality of single patterns is opposite to a convex direction of the folded portion; or

The convex directions of the plurality of single patterns are the same as the convex direction of the folded portion; or

The plurality of single patterns are arranged in a direction in which the convex directions are the same as and opposite to the convex direction of the folded portion.
An electroacoustic transducer comprising the diaphragm according to any one of claims 1 to 10.