CN110958543A

CN110958543A - Vibrating diaphragm and sound generating device

Info

Publication number: CN110958543A
Application number: CN201911333432.3A
Authority: CN
Inventors: 宋启龙; 姜龙; 王昭明; 娄立杭
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-04-03

Abstract

The invention discloses a vibrating diaphragm and a sound production device. The vibrating diaphragm comprises a central part, a corrugated ring part and a fixing part; the folded ring part is connected with the central part and surrounds the outer side of the central part; the fixed part is connected with the folded ring part and is surrounded on the outer side of the folded ring part, the fixed part is arranged in a polygonal mode, and a concave-convex structure is arranged on the fixed part and at least at the transition position of the adjacent side of the fixed part. The invention can effectively release the stress at the position with larger stress concentration of the vibrating diaphragm, thereby ensuring that the fixed part does not generate distortion after the vibrating diaphragm is cut, solving the problems of no enhancement at the corner of the traditional polygonal vibrating diaphragm and easy deformation of the turnover, having better flatness of the vibrating diaphragm, ensuring that the concentricity of the voice coil in the magnetic gap is good after the voice coil is bonded with the vibrating diaphragm, and having excellent nonlinear vibration of the loudspeaker.

Description

Vibrating diaphragm and sound generating device

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a vibrating diaphragm and a sound production device.

Background

The existing loudspeaker diaphragm structure is mostly made of one or more composite structures of engineering plastics and elastomer materials. The elastomer material is widely applied due to the characteristics of good resilience, weather resistance and high damping; however, the elastic body has low modulus and large shrinkage, and the material after hot press molding is often deformed due to uneven stress release, so that the shrinkage deformation of the molded loudspeaker diaphragm is large, the flatness of the diaphragm is poor, the concentricity of the voice coil in the magnetic gap is poor, and the nonlinear distortion of the loudspeaker is serious.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a diaphragm and a sound generating device, and aims to solve the problem that the conventional elastomer diaphragm has large shrinkage deformation after molding, so that the speaker has serious sound loss.

In order to achieve the above object, the present invention provides a diaphragm, including:

a central portion;

the folded ring part is connected with the central part and is arranged around the outer side of the central part; and the number of the first and second groups,

the fixing part is connected with the folded ring part and is arranged around the outer side of the folded ring part, the fixing part is arranged in a polygonal shape, and a concave-convex structure is arranged on the fixing part and at least at the transition position of the adjacent sides of the fixing part.

Optionally, the fixation portion has two end surfaces and an outer circumferential surface connecting the two end surfaces;

the concave-convex structure is arranged on the end surface of at least one fixing part.

Alternatively, the concave-convex structure may include a convex portion that is provided to protrude from an end surface of the fixing portion, the convex portion extending in the inside-outside direction or extending in the circumferential direction of the fixing portion.

Optionally, the concave-convex structure comprises a plurality of convex parts convexly arranged on the end surface of the fixing part, each convex part extends along the inner and outer directions, the plurality of convex parts are arranged at intervals along the circumferential direction of the fixing part, the plurality of convex parts comprise a first convex part, a second convex part and a third convex part, and the second convex part is located at the middle position of the transition of the fixing part; and/or the presence of a gas in the gas,

the height of the protrusion from the end surface of the fixing part is h, wherein 0.02mm < h < 0.2 mm.

Optionally, the first convex portion and the third convex portion are symmetrically distributed with the second convex portion as a central axis.

Optionally, the first protrusion and the second protrusion are gradually closer to each other or gradually separated from each other in the inward-outward direction, so that an included angle α 1 is formed between the first protrusion and the second protrusion, wherein 10 ° ≦ α 1 ° ≦ 45 °, and/or,

in the direction from inside to outside, the third protrusion and the second protrusion are gradually close to each other or gradually separate from each other, so that an included angle α 2 is formed between the third protrusion and the second protrusion, where 10 ° is less than or equal to α 2 ° is less than or equal to 45 °.

Optionally, the first protrusion has a width d1 and a length L1, wherein d1 is 0.1mm ≦ 1.5mm, and L1 is 0.2mm ≦ 10 mm; and/or the presence of a gas in the gas,

the width of the second protrusion is d2, the length of the second protrusion is L2, wherein d2 is 0.1mm ≦ 1.5mm, and L2 is 0.2mm ≦ 10 mm; and/or the presence of a gas in the gas,

the width of the third protrusion is d3, the length of the third protrusion is L3, wherein d3 is 0.1mm ≦ 1.5mm, and L3 is 0.2mm ≦ 10 mm; and/or the presence of a gas in the gas,

the length of the second convex part is set to be 1.1-1.5 times of the length of the first convex part or the length of the third convex part.

Optionally, a distance between an outer end of the first protrusion and an outer edge of the fixing portion is D1, where 0.02mm ≦ D1 ≦ 1.5 mm; and/or the presence of a gas in the gas,

the distance between the outer end of the second convex part and the outer side edge of the fixing part is D2, wherein the distance between the outer end of the second convex part and the outer side edge of the fixing part is more than or equal to 0.02mm and less than or equal to D2 and less than or equal to 1.5 mm; and/or the presence of a gas in the gas,

the distance between the outer end of the third convex part and the outer edge of the fixing part is D3, wherein the distance between the outer end of the third convex part and the outer edge of the fixing part is 0.02mm to 1.5mm, and D3 mm is less than or equal to 0.02 mm.

Optionally, the transition part of two adjacent side edges of the fixing part is arranged in an arc shape, and the radius of the arc is R;

wherein 0.5mm < R < 1.5 mm; and/or, 1.0mm < R < 1.2 mm.

The invention also provides a sound production device, which comprises a vibrating diaphragm, wherein the vibrating diaphragm comprises:

a central portion;

According to the technical scheme provided by the invention, the fixing part of the vibrating diaphragm is arranged in a polygonal shape, the stress concentration at the corners of the adjacent sides on the vibrating diaphragm arranged in the polygonal shape is higher, and the concave-convex structure is arranged on the fixing part and at least at the transition part of the adjacent sides of the fixing part, so that the stress at the position where the stress concentration of the vibrating diaphragm is higher is effectively released, the fixing part can not generate distortion deformation after the vibrating diaphragm is cut, the problems that the corners of the traditional polygonal vibrating diaphragm are not enhanced and are easy to deform in turnover are solved, the flatness of the vibrating diaphragm is better, the good concentricity of the voice coil in the magnetic gap is ensured after the voice coil is bonded with the vibrating diaphragm, and the nonlinear vibration of the loudspeaker is excellent.

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 diaphragm according to a first embodiment of the present invention;

FIG. 2 is an enlarged schematic view of detail A shown in FIG. 1;

FIG. 3 is a schematic view of another view angle of the diaphragm shown in FIG. 1;

FIG. 4 is an enlarged schematic view of detail B shown in FIG. 3;

fig. 5 is a schematic structural diagram of a diaphragm according to a second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a diaphragm according to a third embodiment of the present invention.

The reference numbers illustrate:

the object of the present invention, its functional characteristics and advantageous effects will be further described with reference to the following embodiments and 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 directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In view of this, the present invention provides a diaphragm and a sound generating apparatus, and fig. 1 to 6 are embodiments of the diaphragm provided in the present invention.

Referring to fig. 1 to fig. 2, in the present embodiment, the diaphragm 100 is mainly used in a sound generating device, such as a speaker, and includes a central portion 1, a corrugated portion 2, and a fixing portion 3; the central part 1 is used for being fixedly bonded with a hard ball top and a voice coil in a sound production device, and the voice coil vibrates so as to drive the central headquarters to vibrate to produce sound; the folded ring part 2 is connected with the central part 1 and is arranged around the outer side of the central part 1; the fixed part 3 is connected with the folded ring part 2 and is arranged around the outer side of the folded ring part 2; the fixing portion 3 is arranged in a polygonal shape, the fixing portion 3 is provided with a concave-convex structure 31 at a transition position of an adjacent side of the fixing portion 3, and stress concentration at the transition position of the adjacent side of the fixing portion 3 is the largest, so the concave-convex structure 31 is arranged at the transition position of the adjacent side of the fixing portion 3, and of course, the concave-convex structure 31 can be arranged at other positions of the fixing portion 3 or the transition position and other positions are both provided with the concave-convex structure 31, and the fixing portion 3 is used for fixing the diaphragm 100 on a supporting structure in a sound generating device, so that the diaphragm 100 is fixed in the sound generating device.

In the technical scheme provided by the invention, the fixing part 3 of the vibrating diaphragm 100 is arranged in a polygon shape, the stress concentration at the corners of the adjacent sides on the vibrating diaphragm 100 arranged in the polygon shape is larger, and the concave-convex structure 31 is arranged on the fixing part 3 and at least at the transition part of the adjacent sides of the fixing part 3 so as to effectively release the stress at the position where the stress concentration of the vibrating diaphragm 100 is larger, so that the fixing part 3 can not generate distortion after the vibrating diaphragm 100 is cut, the problems that the corners of the traditional polygonal vibrating diaphragm 100 are not enhanced and are easy to deform in circulation are solved, the flatness of the vibrating diaphragm 100 is better, the concentricity of the voice coil in the magnetic gap is good after the voice coil is bonded with the vibrating diaphragm 100, and the nonlinear vibration of the loudspeaker is excellent.

It should be noted that, in this embodiment, the diaphragm 100 may be disposed in a polygonal shape or a circular shape, and the concave-convex structure 31 may effectively increase a stress releasing area on the fixing portion 3, so as to release an internal stress of the fixing portion 3, so that the fixing portion 3 is formed and manufactured more smoothly, and the mounting of the diaphragm 100 is more stable. In the area formed by the loop part 2, the central part 1 is located in the central area of the loop part 2, i.e. at the innermost side of the loop part 2, and the fixing part 3 is located in the edge area of the loop part 2, i.e. at the outermost side of the loop part 2.

In the present embodiment, the fixing portion 3 has two end surfaces and an outer circumferential surface connecting the two end surfaces, which is an outer edge of the fixing portion 3; concave-convex structure 31 sets up at least one the end surface of fixed part 3, be in promptly when the end surface of fixed part 3 is the level to setting up, concave-convex structure 31 can set up the top surface of fixed part 3 also can set up the bottom surface of fixed part, the end surface is in order to be used for the installation to fix to other bearing structure of sound generating mechanism. The concave-convex structure 31 may include a plurality of convex portions, or may also include a plurality of concave portions, and the concave portions or the convex portions may make a stress release area on the fixing structure larger, so that the fixing portion 3 may be less likely to be deformed.

In an embodiment, referring to fig. 1 and 5, the concave-convex structure 31 includes a convex portion protruding from the end surface of the fixing portion 3, and the convex portion may extend along the inner and outer directions, that is, along the central region of the annular folding portion 2 to the edge region; alternatively, with reference to fig. 6, the protrusions may also extend along the circumference of the anchoring portion 3, so as to be distributed at the transition between adjacent edges.

In another embodiment, the concave-convex structure 31 includes a plurality of convex portions protruding from the end surface of the fixing portion 3, each of the convex portions extends along the inner and outer directions, that is, extends along the central region of the annular portion 2 to the edge region, and the convex portions are arranged along the circumferential direction of the fixing portion 3 at intervals, the convex portions include a first convex portion 311, a second convex portion 312 and a third convex portion 313, the second convex portion 312 is located at the middle position of the transition of the fixing portion 3, when two adjacent sides of the fixing portion 3 are arranged at a right angle, the second convex portions 312 are located on the bisector of the two adjacent sides to be connected so as to be uniformly distributed at the transition of the fixing portion 3, so that the stress release of the fixing portion 3 is more balanced, and the forming effect of the diaphragm 100 is better.

Specifically, the height of the protruding portion protruding from the end surface of the fixing portion 3 is h, and if the protruding height of the protruding portion is too high, the installation of the fixing portion 3 is affected, so that the fixing portion 3 is not firmly bonded to other structures; since the protrusion height of the protrusion is too low, it does not act to relieve stress, and therefore, 0.02mm ≦ h ≦ 0.2mm is generally adopted, and the fixing portion 3 can be easily attached while the stress relieving area can be effectively increased.

The first protrusion 311 and the third protrusion 313 are symmetrically distributed around the second protrusion 312 as a central axis, so that stress release at each transition of the fixing portion 3 is more uniform.

In this embodiment, the first protrusion 311 and the third protrusion 313 are disposed on two sides of the second protrusion 312, and the first protrusion 311 and the second protrusion, and the second protrusion 312 and the third protrusion 313 are disposed at an angle to form a "claw" type structure distribution, specifically, referring to fig. 1, fig. 2 and fig. 5, in a direction from inside to outside, i.e. along a central region of the flexure 2 to an edge region of the flexure 2, the first protrusion 311 and the second protrusion 312 are disposed gradually closer to or gradually separated from each other, so that an included angle α 1 is formed between the first protrusion 311 and the second protrusion 312, wherein 10 ° ≦ α 1 ≦ 45 °, the first protrusion 311 is disposed close to a stress point, so that internal stress stretching can be buffered, so that stress concentration can be effectively dispersed, and disposed at an angle to the second protrusion 312, so that a disposition length of the first protrusion can be extended, so that a stress release area can be increased, and a shape of the diaphragm 100 can be ensured.

Similarly, based on the same arrangement principle as the first protrusion 311, in the direction from inside to outside, that is, in the direction from the central area of the annular flange 2 to the edge area of the annular flange 2, the third protrusion 313 and the second protrusion 312 are gradually close to each other or gradually separated from each other, so that an included angle α 2 is formed between the third protrusion 313 and the second protrusion 312, where 10 ° ≦ α 2 ≦ 45 °,. of course, if the first protrusion 311 and the third protrusion 313 can be symmetrically distributed on two sides of the second protrusion 312, two sides are symmetrically distributed, so as to improve the formability of the diaphragm 100, and certainly, according to the distribution situation of the actual stress on the diaphragm 100, the third protrusion 313 and the third protrusion can be asymmetrically distributed on two sides of the second protrusion 312.

In this embodiment, referring to fig. 2, the width of the first protrusion 311 is d1, the length of the first protrusion 311 is L1, and both the length and the width of the first protrusion 311 should not be set too large or too small, so that the mounting area of the fixing portion 3 adhered to other structures is too small, the diaphragm 100 is not firmly mounted, and if it is too small, the effect of buffering stress stretching is not achieved; therefore, the diaphragm 100 can be formed with good formability and can be mounted firmly by taking d1 ≦ 1.5mm ≦ 0.1mm ≦ and L1 ≦ 10 mm.

Based on the same design principle, the width of the second protrusion 312 is d2, and the length of the second protrusion 312 is L2, wherein d2 is 0.1mm ≦ 1.5mm, and L2 is 0.2mm ≦ 10 mm; the width of the third protrusion 313 is d3, the length of the third protrusion 313 is L3, wherein d3 is 0.1mm ≦ 1.5mm, L3 is 0.2mm ≦ 10mm, and the shapes and sizes of the first protrusion 311 and the third protrusion 313 can be set to be consistent; the diaphragm 100 may be differently configured according to the molding requirement of the specific diaphragm. The length of the second protrusion 312 is equal to the length of the first protrusion 311 and the length of the third protrusion 313.

In this embodiment, the length of the second convex portion 312 may be set to be 1.1 to 1.5 times the length of the first convex portion 311 or the length of the third convex portion 313 with reference to the first convex portion 311 or the third convex portion 313 so as to increase the stress release area where the stress is maximum.

In this embodiment, referring to fig. 3 and 4, a distance between an outer end of the first protrusion 311 and an outer edge of the fixing portion 3 is D1, and if the first protrusion 311 is disposed too close to the outer edge of the fixing portion 3, the first protrusion 311 is easy to process, and if the first protrusion 311 is disposed too far from the outer edge of the fixing portion 3, the first protrusion 311 has a limited length, so that the stress releasing area is not effectively utilized, and therefore, generally 0.02mm ≦ D1 ≦ 1.5mm is adopted, so that the first protrusion 311 is convenient to process and can effectively disperse the stress on the fixing portion 3.

Based on the same design principle, the distance between the outer end of the second protrusion 312 and the outer edge of the fixing portion 3 is D2, wherein 0.02mm ≦ D2 ≦ 1.5 mm; the distance between the outer end of the third protrusion 313 and the outer edge of the fixing portion 3 is D3, where 0.02mm is less than or equal to D3 is less than or equal to 1.5mm, so that the diaphragm 100 has a better molding effect and a higher flatness.

In this embodiment, the transition portion between two adjacent side edges of the fixing portion 3 is disposed in an arc shape, so as to form an arc transition at the corner of the peripheral side of the fixing portion 3, so that the stress is more dispersed, specifically, the radius of the arc is R, where R is greater than or equal to 0.5mm and is less than or equal to 1.5mm, and when R is greater than or equal to 1.0mm and is less than or equal to 1.2mm, the molding effect of the diaphragm 100 is optimal. The size of the arc may be adaptively adjusted according to the specific size of the diaphragm 100.

In this embodiment, the diaphragm 100 may be formed by a mold, and may be machined by a machining process, an electrical discharge machining process, a laser processing process, an etching process, a sand blasting process, or a combination thereof. The concave-convex structure 31 can be formed by a hot-pressing process, and the hot-pressing process comprises the following steps: gas explosion forming, compression forming, vacuum adsorption forming or a combination of the forming processes.

The invention further provides a sound generating device, which comprises the vibrating diaphragm 100, so as to have all technical characteristics of the vibrating diaphragm 100 and all technical effects brought by the technical characteristics, which are not repeated herein.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. A diaphragm, comprising:

a central portion;

2. The diaphragm of claim 1, wherein the fixing portion has two end surfaces and an outer circumferential surface connecting the two end surfaces;

3. The diaphragm according to claim 2, wherein the concavo-convex structure includes a convex portion that is provided convexly to an end surface of the fixing portion, the convex portion extending in the direction of the inner and outer sides or extending in the circumferential direction of the fixing portion.

4. The diaphragm of claim 2, wherein the concavo-convex structure includes a plurality of convex portions that are convexly provided on the end surface of the fixing portion, each of the convex portions extending in the inner and outer directions, and the plurality of convex portions are provided at intervals along the circumferential direction of the fixing portion, the plurality of convex portions including a first convex portion, a second convex portion, and a third convex portion, the second convex portion being located at a middle position of a transition of the fixing portion; and/or the presence of a gas in the gas,

5. The diaphragm of claim 4, wherein the first convex portion and the third convex portion are symmetrically distributed with the second convex portion as a central axis.

6. The diaphragm of claim 4, wherein the first protrusion and the second protrusion are gradually closer to each other or gradually separate from each other in an inward-outward direction, such that an included angle α 1 is formed between the first protrusion and the second protrusion, wherein 10 ° ≦ α 1 ≦ 45 °, and/or,

7. The diaphragm of claim 4, wherein the first protrusion has a width d1 and a length L1, where d1 is 0.1mm ≦ 1.5mm, and L1 is 0.2mm ≦ 10 mm; and/or the presence of a gas in the gas,

8. The diaphragm of claim 4, wherein a distance D1 is defined between an outer end of the first protrusion and an outer edge of the fixing portion, where D1 is 0.02mm < 1.5 mm; and/or the presence of a gas in the gas,

9. The diaphragm of claim 1, wherein the transition between two adjacent sides of the fixing portion is arc-shaped, and the radius of the arc is R;

wherein 0.5mm < R < 1.5 mm; and/or, 1.0mm < R < 1.2 mm.

10. A sound-emitting device, comprising the diaphragm according to any one of claims 1 to 9.