WO2021134190A1

WO2021134190A1 - Diaphragm and sound generating device

Info

Publication number: WO2021134190A1
Application number: PCT/CN2019/129873
Authority: WO
Inventors: 梁平; 赵彬
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-08

Abstract

Disclosed in the present utility model is a diaphragm, which comprises a vibrating part and a folding ring part that extends from the vibrating part and is provided surrounding the vibrating part; and the folding ring part comprises a folding ring upper surface and a folding ring lower surface opposite to the folding ring upper surface. The diaphragm further comprises an upper pattern die part formed by the folding ring upper surface protruding or being recessed and a lower pattern die part formed by the folding ring lower surface protruding or being recessed, and the structures of the upper pattern die part and the lower pattern die part are different. Further provided in the present utility model is a sound generating device utilizing the diaphragm. Compared with the related technology, the diaphragm and sound generating device of the present utility model have good stability and more excellent acoustic performance.

Description

Diaphragm and sound device

Technical field

The utility model relates to the field of electro-acoustic conversion, in particular to a diaphragm and a sound device using the diaphragm.

Background technique

In the process of rapid development of portable devices such as mobile phones, people have become more and more demanding on the functionality of products. For the music appreciation function of mobile phones and other electronic devices, in order to make the entertainment effect stronger, there has been a music with vibration. Mode, as a result, the development of sound devices has also been accelerated accordingly.

A related art sounding device includes a basin frame, a diaphragm supported on the basin frame, and a voice coil that drives the diaphragm to vibrate. The vibrating membrane includes a vibrating portion and a folding ring portion extending from the vibrating portion and surrounding the vibrating portion.

technical problem

However, in the related art sounding device, the cross section of the folded ring portion is in an arc structure, and the upper and lower surfaces of the folded ring portion are both smooth surface structures. This structure prevents the acoustic performance of the diaphragm from being further improved. When the diaphragm vibrates, it may swing, which may cause noise or even distortion, and cause the acoustic performance of the sound emitting device to be limited.

Therefore, it is necessary to provide a new diaphragm and sounding device to solve the above technical problems.

Technical solutions

The purpose of the utility model is to overcome the above technical problems and provide a diaphragm and sound device with good stability and better acoustic performance.

The utility model provides a vibrating membrane, which includes a vibrating part and a folding ring part extending from the vibrating part and surrounding the vibrating part. The folding ring part includes an upper surface of a folding ring and an upper surface of the folding ring. The lower surface of the opposite folding ring; the diaphragm also includes an upper pattern mold portion formed by the convex or concave upper surface of the folding ring and a lower pattern mold portion formed by the convex or concave lower surface of the folding ring, so The structure of the upper pattern mold portion and the lower pattern mold portion are different.

Preferably, the folded ring portion has a rectangular structure with rounded corners, and the upper pattern mold portion and the lower pattern mold portion are both located at the rounded corners of the folded ring portion.

Preferably, the upper pattern mold portion includes a plurality of upper characteristic patterns arranged at intervals along the circumferential direction of the fold ring portion surrounding the vibrating portion, and each of the upper characteristic patterns includes a first characteristic portion having a strip-shaped structure And a second feature part in a strip-shaped structure, the first feature part and the second feature part are both straddling the folding ring part and intersecting each other; the lower pattern mold part includes a part along the folding ring part A plurality of lower characteristic patterns are arranged at intervals around the surrounding direction of the vibrating part, and the lower characteristic patterns are in a strip structure.

Preferably, the upper pattern mold portion is formed by recessing the upper surface of the folding ring toward the lower surface of the folding ring; the lower pattern mold portion is convex from the lower surface of the folding ring in a direction away from the upper surface of the folding ring. Out of formation.

Preferably, the upper pattern mold portion is formed by protruding from the upper surface of the folding ring in a direction away from the lower surface of the folding ring; the lower pattern mold portion faces the upper surface of the folding ring from the lower surface of the folding ring The depression is formed.

Preferably, the upper pattern mold portion is formed by the upper surface of the folding ring protruding away from the lower surface of the folding ring; the lower pattern mold portion is formed by the lower surface of the folding ring away from the upper surface of the folding ring The direction is convex.

Preferably, the upper pattern mold portion is formed by recessing the upper surface of the folding ring toward the lower surface of the folding ring; the lower pattern mold portion is formed by recessing the lower surface of the folding ring toward the upper surface of the folding ring. .

Preferably, the diaphragm is made of any one material or multiple composite materials among silica gel, rubber, PEEK, and TPU.

Preferably, the diaphragm is an integrally formed structure.

The utility model also provides a sound generating device, which includes a basin frame, a diaphragm fixedly supported on the basin frame, and a voice coil for driving the diaphragm to vibrate. The diaphragm is the aforementioned diaphragm provided by the utility model.

Beneficial effect

Compared with the prior art, the diaphragm provided by the present utility model is provided with a convex or concave upper pattern forming part on the upper surface of the folding ring of the folding ring and a convex or concave forming part on the lower surface of the folding ring. The lower pattern mold portion, the upper pattern mold portion and the lower pattern mold portion have different structures. This structure makes the upper surface of the folding ring and the lower surface of the folding ring form different types of graphic structures, which can be adjusted as needed to improve the structural strength of the diaphragm, and improve the problem that the R angle of the diaphragm is easily broken when the diaphragm vibrates up and down. When the diaphragm is used in a sounding device, the balance and stability of the vibration of the diaphragm are effectively improved, the pure tone, distortion and swing of the sounding device are improved, and the acoustic performance of the sounding device is better.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic structural diagram of the first embodiment of the diaphragm of the present invention;

Figure 2 is a cross-sectional view along the line A-A in Figure 1 (a);

Figure 3 is a schematic structural diagram of the second embodiment of the diaphragm of the present invention;

Figure 4 is a cross-sectional view taken along line B-B in Figure 3 (a);

Figure 5 is a schematic structural diagram of the third embodiment of the diaphragm of the present invention;

Figure 6 is a cross-sectional view taken along line C-C in Figure 5 (a);

Figure 7 is a schematic structural diagram of the fourth embodiment of the diaphragm of the present invention;

Figure 8 is a cross-sectional view taken along the line D-D in Figure 7 (a);

Fig. 9 is an exploded schematic diagram of a part of the structure of the sound generating device of the present invention.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

Referring to FIGS. 1-2, the present invention provides a diaphragm 10, which includes a vibrating portion 1 and a folding ring portion 2 extending from the vibrating portion 1 and surrounding the vibrating portion 1.

The vibrating part 1 is used for vibrating and sounding, and the folding ring part 2 is used for providing elastic supporting force for the vibrating part 1 to achieve the required amplitude of the vibrating part 1 when it vibrates.

The folding ring portion 2 includes a folding ring upper surface 21 and a folding ring lower surface 22 opposite to the folding ring upper surface 21.

In order to adjust and improve the acoustic performance of the diaphragm 10 such as pure tone, distortion, stability, vibration balance, etc., in this embodiment, the diaphragm 10 further includes an upper pattern mold formed by the convex or concave surface 21 of the folding ring. Portion 23 and a lower pattern mold portion 24 formed by protruding or recessing the lower surface 22 of the folding ring. The upper pattern mold portion 23 and the lower pattern mold portion 24 have different structures. More preferably, the upper pattern mold portion 23 and the lower pattern mold portion 24 are arranged directly opposite to each other.

Specifically, the folding ring portion 2 has a rectangular structure with rounded corners, the upper pattern mold portion 23 is located at the rounded corners of the folding ring portion 2; the lower pattern mold portion 24 is located at the folding ring portion 2 Rounded corners. The setting of the structure position improves the structural strength of the round corner (R angle) of the diaphragm 10, and effectively improves the problem that the round corner (R angle) of the diaphragm 10 is easily broken when the diaphragm 10 vibrates up and down, thereby further improving the vibration balance and stability. It can improve the pure tone, distortion and swing performance of the diaphragm 10.

More preferably, the upper pattern mold portion 23 includes four, which are respectively located at the four rounded positions of the folding ring portion 2, and the lower pattern mold portion 24 includes four, and each is located at the folding ring portion. 2 of the four fillet positions.

In this embodiment, the upper pattern mold portion 23 and the lower pattern mold portion 24 have different structures, such as:

The upper pattern mold portion 23 includes a plurality of upper characteristic patterns 231 arranged at intervals along the circumferential direction of the folding ring portion 2 around the vibrating portion 1, and each of the upper characteristic patterns 231 includes a first strip-shaped structure. The characteristic portion 2311 and the second characteristic portion 2312 having a strip-shaped structure, the first characteristic portion 2311 and the second characteristic portion 2312 both cross the folding ring portion 2 and are arranged to cross each other.

The lower pattern mold portion 24 includes a plurality of lower characteristic patterns 241 arranged at intervals along the circumferential direction of the folding ring portion 2 around the vibrating portion 1, and the lower characteristic patterns 241 are in a strip-shaped structure.

Of course, the specific shapes and structures of the upper pattern mold portion 23 and the lower pattern mold portion 24 are only an example, but are not limited to the above examples, as long as the upper pattern mold portion 23 and the lower pattern mold portion 24 are different in structure, it can be realized. The purpose of this utility model.

The above structure does not change the overall weight of the diaphragm 10 too much, and has no significant impact on its resonance frequency F0, sound pressure level SPL and other performance. The above-mentioned double-sided design of the diaphragm 10 makes the upper surface 21 of the folding ring and the lower surface 22 of the folding ring form different types of graphic structures, compared to the same type of graphic structure formed on the upper surface of the folding ring and the lower surface of the folding ring. Diaphragm, the folding ring graphic structure design of the utility model is flexible and diverse, and can be adjusted according to the performance requirements of different products to improve the structural strength of the diaphragm, and realize the independent adjustment of the local rigidity and strength requirements of the product, which effectively improves The balance and stability of the vibration of the diaphragm 10 improve its pure tone, distortion and swing problems, and the acoustic performance is better.

In this embodiment, the diaphragm 10 is made of any one material or multiple composite materials among silica gel, rubber, PEEK, and TPU. More preferably, the diaphragm 10 is an integrally formed structure.

In the present invention, the formation of the upper pattern mold portion 23 and the lower pattern mold portion 24 includes but is not limited to the following four embodiments:

Example one

As shown in FIG. 1-2, as shown in FIG. 1(a), it is the front surface of the diaphragm 10, which corresponds to the upper surface 21 of the folding ring. The upper pattern mold portion 23 is formed by recessing the upper surface 21 of the folding ring toward the lower surface 22 of the folding ring, that is, the upper pattern mold portion 23 has a groove-shaped structure.

As shown in Fig. 1(b), it is the back surface of the diaphragm 10, which corresponds to the lower surface 22 of the folding ring. The lower pattern mold portion 24 is formed by protruding the lower surface 22 of the folding ring in a direction away from the upper surface 21 of the folding ring, that is, the lower pattern mold portion 24 has a corrugated structure.

Example two

Refer to FIG. 3-4 as shown in FIG. 3(a), which is the front surface of the diaphragm 210, which corresponds to the upper surface 221 of the folding ring. The upper pattern mold portion 223 is formed by protruding from the upper surface 221 of the folding ring in a direction away from the lower surface 222 of the folding ring, that is, the upper pattern mold portion 223 has a convex corrugated structure.

As shown in FIG. 3( b ), it is the back surface of the diaphragm 210, which corresponds to the lower surface 222 of the folding ring. The lower pattern mold portion 224 is formed by recessing the lower surface 222 of the folding ring toward the upper surface 221 of the folding ring, that is, the lower pattern mold portion 224 has a groove-shaped structure.

Example three

Referring to FIGS. 5-6, as shown in FIG. 5(a), it is the front surface of the diaphragm 310, which corresponds to the upper surface 321 of the folding ring. The upper pattern mold portion 323 is formed by protruding from the upper surface 321 of the folding ring in a direction away from the lower surface 322 of the folding ring, that is, the upper pattern mold portion 323 has a convex corrugated structure.

As shown in FIG. 5( b ), it is the back surface of the diaphragm 310, which corresponds to the lower surface 322 of the folding ring. The lower pattern mold portion 324 is formed by the lower surface 322 of the folding ring protruding away from the upper surface 321 of the folding ring, that is, the lower pattern mold portion 324 has a convex corrugated structure.

Example four

Referring to FIGS. 7-8, as shown in FIG. 7(a), it is the front surface of the diaphragm 410, which corresponds to the upper surface 421 of the folding ring. The upper pattern mold portion 423 is formed by recessing the upper surface 421 of the folding ring toward the lower surface 422 of the folding ring, that is, the upper pattern mold portion 423 has a groove-shaped structure.

As shown in FIG. 7( b ), it is the back surface of the diaphragm 410, which corresponds to the lower surface 422 of the folding ring. The lower pattern mold portion 424 is formed by recessing the lower surface 422 of the folding ring toward the upper surface 421 of the folding ring, that is, the lower pattern mold portion 424 has a groove-shaped structure.

Please refer to FIG. 9 in conjunction with FIG. 9, the present invention provides a sound emitting device 100, and the sound emitting device 100 includes the above-mentioned diaphragm 10.

Specifically, the sound emitting device 100 includes a basin frame 20, the diaphragm 10 fixedly supported on the basin frame 20, a voice coil 30 that drives the diaphragm 10 to vibrate and produce sound, and a magnetic frame fixed to the basin frame 20. Road system 40.

The basin frame 20 is used to fix and support the diaphragm 10 and the magnetic circuit system 40.

The voice coil 30 is fixed to the diaphragm 10, the electric field generated by the voice coil 30 and the magnetic field generated by the magnetic circuit system 40 work together to form an electromagnetic field, so that the voice coil 30 moves up and down repeatedly, and then passes through the The voice coil 30 drives the diaphragm 10 to vibrate and produce sound.

Compared with the prior art, the diaphragm provided by the present utility model is provided with a convex or concave upper pattern forming part on the upper surface of the folding ring of the folding ring and a convex or concave forming part on the lower surface of the folding ring. The lower pattern mold portion, and the upper pattern mold portion and the lower pattern mold portion have different structures. This structure makes the upper surface of the folding ring and the lower surface of the folding ring form different types of graphic structures. Compared with the diaphragm with the same type of graphic structure formed on the upper surface of the folding ring and the lower surface of the folding ring, the folding ring pattern of the present invention The structural design methods are flexible and diverse, and can be adjusted to improve the structural strength of the diaphragm according to the performance requirements of different products, and realize the independent adjustment of the local stiffness and strength requirements of the product, which effectively improves the balance and stability of the vibration of the diaphragm. Improved its pure tone, distortion and swing problems, and better acoustic performance.

The above are only the embodiments of the utility model, and do not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the description and drawings of the utility model, or directly or indirectly applied to other Related technical fields are included in the scope of patent protection of the utility model in the same way.

Claims

A vibrating membrane comprising a vibrating part and a folding ring part extending from the vibrating part and surrounding the vibrating part, the folding ring part comprising an upper surface of the folding ring and a folding ring opposite to the upper surface of the folding ring The lower surface is characterized in that the diaphragm further includes an upper pattern mold portion formed by the protrusion or depression of the upper surface of the folding ring and a lower pattern mold portion formed by the protrusion or depression of the lower surface of the folding ring, so The structure of the upper pattern mold portion and the lower pattern mold portion are different.
The diaphragm according to claim 1, wherein the folded ring portion has a rectangular structure with rounded corners, and the upper pattern mold portion and the lower pattern mold portion are both located at the rounded corners of the folded ring portion. Place.
The diaphragm according to any one of claims 1, wherein the upper pattern mold portion includes a plurality of upper characteristic patterns spaced apart along the direction of the ring portion surrounding the vibrating portion, each The above-mentioned characteristic figure includes a first characteristic part in a strip-shaped structure and a second characteristic part in a strip-shaped structure, the first characteristic part and the second characteristic part both cross the folding ring part and are arranged to cross each other The lower pattern mold portion includes a plurality of lower characteristic patterns arranged at intervals along the circumferential direction of the ring portion surrounding the vibrating portion, and the lower characteristic patterns are in a strip-shaped structure.
The diaphragm according to claim 2, wherein the upper pattern mold portion is formed by recessing the upper surface of the folding ring toward the lower surface of the folding ring; the lower pattern mold portion is formed by the lower surface of the folding ring. The surface is formed to protrude away from the upper surface of the folding ring.
The diaphragm according to claim 2, wherein the upper pattern mold portion is formed by the upper surface of the folding ring protruding away from the lower surface of the folding ring; the lower pattern mold portion is formed by the folding ring The lower surface of the ring is recessed in the direction of the upper surface of the folded ring.
The diaphragm according to claim 2, wherein the upper pattern mold portion is formed by the upper surface of the folding ring protruding away from the lower surface of the folding ring; the lower pattern mold portion is formed by the folding ring The lower surface of the ring is convexly formed away from the upper surface of the folded ring.
The diaphragm according to claim 2, wherein the upper pattern mold portion is formed by recessing the upper surface of the folding ring toward the lower surface of the folding ring; the lower pattern mold portion is formed by the lower surface of the folding ring. The surface is recessed in the direction of the upper surface of the folding ring.
The diaphragm according to claim 2, wherein the diaphragm is made of any one material or multiple composite materials selected from silica gel, rubber, PEEK, and TPU.
4. The diaphragm of claim 2, wherein the diaphragm is an integrally formed structure.
A sounding device, comprising a basin frame, a diaphragm fixedly supported on the basin frame, and a voice coil that drives the diaphragm to vibrate, characterized in that the diaphragm is any one of claims 1-9 Diaphragm.