TWI580282B - Reduces the vibrator of the diaphragm - Google Patents

Description

Loudspeaker for reducing diaphragm vibration

The present invention relates to a speaker device, and more particularly to a speaker that uses a damping material to reduce the vibration of the diaphragm and adjust the vibration deformation to achieve the desired deformation and damping.

Press, the speaker is a device that converts electrical energy into sound. The structure of the speaker has a frame, a magnetic component, a diaphragm and a hanging edge. The suspension is connected to the diaphragm and the frame, so that the diaphragm can vibrate on the frame, and the diaphragm is generated by the magnetic force generated by the magnetic component to generate sound.

When the diaphragm vibrates, the generated vibration wave propagates outward along the diaphragm to the overhang. However, most speakers are difficult to properly match the impedance of the suspension and the diaphragm, and the vibration travels to the suspension. At this time, the energy of the vibration wave cannot be surely eliminated, so that the vibration wave rebounds again into the diaphragm, thereby generating a residual vibration wave.

In general, it is made of a material that is light in weight and long in linear range. The commonly used material is rubber or a cloth coated with a damping material. However, this design will produce large amplitude and poor residual vibration at certain frequencies. Please refer to Appendix 1 for the time (ms)-decibel (dB)-frequency (Hz) test obtained by the inventor to test the conventional loudspeaker diaphragm. As can be seen from the figure, when using a conventional suspension, the conventional loudspeaker diaphragm generates large amplitude vibrations and poor residual vibration at certain frequencies, for example, a kilohertz (Hz), which generates a large amount of noise. It seriously affects the sound quality of the speaker. Therefore, how to design a speaker that can surely eliminate the residual vibration wave has always been one of the problems that the industry wants to overcome.

In order to achieve the purpose of effectively reducing the vibration wave, it is an excellent way to improve the design of the suspension. However, looking at the current technology and various books, the current circulation speaker is not designed for the suspension. It is a pity that the improvement, in view of this, the inventors have proposed the structural design of the present invention.

The main object of the present invention is to provide a speaker for reducing vibration of a diaphragm, which is attached to at least one layer of damping material with high damping and low modulus of elasticity on the suspension side of the speaker, and can surely eliminate the transmission to the suspension. Vibration energy, and prevent the generation of residual vibration waves, improve the sound quality of the speaker.

The speaker for reducing vibration of a diaphragm provided by the invention comprises: a frame; a diaphragm having flexibility, being a thin object, disposed in the frame; a hanging edge, flexible, The cross-sectional shape is substantially curved and has an arc-shaped convex surface and an arc-shaped concave surface; the inner periphery of the hanging edge is connected to the diaphragm, and the outer periphery is connected to the frame; at least one layer of damping material is Made of a material having high damping property and low modulus of elasticity, and attached to one surface of the suspension edge along the circumference of the suspension edge, the inner side edge of which is spaced from the inner circumference of the suspension edge; the damping material The layer quality is symmetrically attached to the surface of the overhang.

Preferably, the layer of damping material is attached to the convex surface of the suspension, and the area of the damping material layer does not exceed two-thirds of the convex area of the hanging edge.

Preferably, the layer of damping material is attached to the concave surface of the hanging edge, and the area of the damping material layer does not exceed one-half of the concave area of the hanging edge.

Preferably, the hanging edge has two layers of damping material, respectively a convex damping material layer attached to the convex surface of the hanging edge and a concave damping material layer of the concave surface of the hanging edge; The area of the convex damping material layer of the overhanging convex surface does not exceed two-thirds of the convex surface area of the hanging side, and the area of the concave damping material layer of the hanging side concave surface does not exceed one-half of the concave surface area of the hanging side .

Preferably, the layer of damping material can be a discontinuous arrangement.

Preferably, the layer of damping material is extendably attached to the frame to increase the damping effect.

Therefore, the speaker of the present invention absorbs the vibration wave generated by the vibration of the diaphragm by the damping material layer, thereby reliably destroying the energy of the vibration wave, reducing the generation of the residual vibration wave, and achieving the desired deformation of the speaker. Damping, which improves the sound quality of the speaker.

10‧‧‧ Speaker

11‧‧‧Frame

12‧‧‧ magnet

13‧‧‧ coil

14‧‧‧Dust cover

20‧‧‧Densor

30‧‧‧ hanging edge

40‧‧‧Wave material layer

40'‧‧‧ convex damping material layer

40"‧‧‧ concave damping material layer

42‧‧‧ Configuration

D‧‧‧ radial length

D1‧‧‧first radial length

D2‧‧‧second radial length

A‧‧‧ long axis

b‧‧‧Short axis

In order to enable the reviewing committee to further understand the objects, features, and effects of the present invention, the present invention will be described in detail with reference to the accompanying drawings, in which: A perspective view of a preferred embodiment of the speaker.

The second figure is a partial top view of the first figure, showing only the diaphragm and the hanging edge.

The third figure is a cross-sectional view taken along line 3-3 of the first figure.

The fourth figure is a partial enlarged view of the third figure.

The fourth diagram (A) is similar to the fourth diagram and shows another embodiment of the damping material layer.

Figure 5 is a cross-sectional view of a speaker of a second preferred embodiment of the present invention, showing only the diaphragm and the suspension of the speaker.

The sixth picture is the bottom view of the fifth figure.

Figure 7 is a perspective view of a diaphragm and a suspension of a speaker according to a third preferred embodiment of the present invention. Sectional view.

The eighth figure is a partial enlarged view of the seventh figure.

The ninth drawing is a top view of the speaker of the fourth preferred embodiment of the present invention, and only the diaphragm and the hanging edge of the speaker are shown.

Figure 11 is a top plan view showing a diaphragm and a suspension of a speaker according to a fifth preferred embodiment of the present invention.

Figure 11 is a top plan view showing a diaphragm and a suspension of a speaker of a sixth preferred embodiment of the present invention.

Figure 12 is a top plan view of a diaphragm and a suspension of a speaker of a seventh preferred embodiment of the present invention.

Figure 13 is a partial perspective view of a field acoustic device of an eighth preferred embodiment of the present invention.

Referring to the first to fourth embodiments, the speaker 10 for reducing the vibration of the diaphragm provided by the first preferred embodiment of the present invention has a diaphragm 20 mounted in the speaker 10, the diaphragm 20 and the speaker. 10 is connected by a hanging edge 30.

The diaphragm 20 is a thin, tapered object having flexibility and can be made of a material such as metal, polymer material, paper or fiber (carbon fiber or glass fiber).

In detail, the speaker 10 has a frame 11, a magnetic component, the suspension 30, the diaphragm 20 and a dust cover 14. The magnetic component is disposed between the frame 11 and the diaphragm 20, and includes a magnet 12 and a coil 13 to generate a magnetic force that attracts or repels to push the diaphragm 20 in the axial direction of the coil 13. motion. The suspension 30 is annular, the outer periphery of which is connected to the frame 11, and the inner periphery is connected to the diaphragm 20. The dust cover 14 is attached to the center of the diaphragm 20. The suspension The side 30 has flexibility and can be the same or different material as the diaphragm 20, and the diaphragm 20 can be vibrated on the frame 11 by the flexibility of the suspension 30. The magnetic component generates sound waves by its magnetically compressed air, which can push the diaphragm 20 to vibrate. The specific structure of the speaker 10 is not the subject of the present invention and will not be described again.

As shown in the third and fourth figures, the cross-sectional shape of the suspension 30 in the radial direction is substantially curved, and the top surface and the bottom surface respectively form an arc-shaped convex surface and an arc-shaped concave surface. The overhang 30 has a radial length D formed between the outer periphery and the inner periphery of the overhang.

The invention further comprises a damping material layer 40 which is composed of a material having high damping property and low elastic modulus (K value), such as clay or rubber, but not limited thereto. The damping material layer 40 is disposed along the circumference of the suspension edge 30 and is symmetrically disposed on the suspension edge 30. The mass symmetry refers to at least one halving divided by the center of the hanging edge 30, such as two equal parts, three equal parts, and four equal parts. . . Etc., the mass of the damping material layer 40 is symmetrically distributed on the hanging edge. The layers of the damping material shown in the drawings of the embodiments of the present specification are all in a state in which the mass is symmetrical. In the present embodiment, the damping material layer 40 is annularly disposed along the circumference of the suspension edge 30 and adheres to the convex surface of the suspension edge 30, and is continuously disposed without interruption. The damping material layer 40 is attached to the inner periphery by a peripheral edge other than the overhang. In the radial direction of the diaphragm 20, a first radial length d1 is formed between the outer side and the inner side of the damping material layer 40. The inner side of the layer of damping material 40 remains at a distance from the inner periphery of the overhang 30.

It should be noted that the damping material layer 40 may have a uniform thickness, or the thickness thereof may not be uniform. The closer to the damping material layer 40 of the frame 11, the thickness thereof may increase, as shown in the fourth figure (A). The mass of the damping material layer is increased outward to improve the damping effect.

Furthermore, when the damping material layer 40 is attached to the hanging edge 30, it is outside The side edges may be attached to the frame 11, as in the fourth diagram (A), that is, the layer of damping material may be continuously extended from the suspension edge 30 and attached to the frame to dampen the suspension 30 and the frame 11. The material layer 40 is continuous. When the damping material layer 40 is attached to the frame 11, the damping effect can also be enhanced.

The thickness relationship of the aforementioned damping material layer 40 and the relationship extending to the frame can be applied to other preferred embodiments of the present invention.

When the speaker 10 is actuated, the magnetic force of the magnetic component causes the diaphragm 30 to generate a vibration wave which is directed on the diaphragm toward the suspension 30 and is subjected to high damping and low elasticity of the damping material layer 40. The influence of the coefficient can reliably consume the energy of the vibration wave, and it can not be reflected again to form a residual vibration wave, thereby effectively reducing the generation of noise. When the diaphragm 20 vibrates, the vibration generated by the diaphragm 20 causes the suspension 30 to rise and fall. At this time, the convex surface of the suspension 30 is in a state of being stretched, so that the high damping property and the low elastic modulus are adhered. The energy consuming damping material layer 40 can provide the function of the suspension 30 to absorb the vibration energy. In order to maintain the upper and lower deflection of the suspension, and to take into account the effect of the damping material layer 40 absorbing vibration waves, the inventors have verified through multiple experiments that the area of the damping material layer 40 cannot exceed three-thirds of the convex area of the suspension edge 30. Second, and the first radial length d1 does not exceed the radial length D of the suspension 30, so that the effect of eliminating the vibration wave can be eliminated, and the sensitivity of the speaker 10 is not significantly reduced, and the diaphragm 20 is made. Get the ideal deformation and damping to ensure sound quality and eliminate noise.

By the energy dissipation effect of the high damping property and the low elastic modulus of the damping material layer 40, the energy of the vibration wave can be surely consumed, and it can no longer be reflected again to form a residual vibration wave, thereby effectively reducing the generation of noise. The actual use efficiency of the present invention can be referred to Annex II, and the second part is the time (ms)-decibel (dB)-frequency (Hz) test of the speaker diaphragm of the present invention which has been completed by many experiments after long-term research by the inventor. Figure, comparing the test chart of Annex II with the test chart of Annex 1, the invention can be found The overall noise of the diaphragm is obviously reduced. Please refer to the one kilohertz, it is easier to find that the noise has been significantly improved, the clarity of the speaker is greatly improved, and the user can enjoy better hearing.

Referring to the fifth and sixth figures, a speaker according to a second preferred embodiment of the present invention, the same components are denoted by the same reference numerals, and only the diaphragm 20, the suspension 30 and the damping material layer 40 are shown. This embodiment and the first embodiment The difference is that the damping material layer 40 of the present embodiment is disposed on the concave surface of the suspension edge 30 and is disposed from the outer periphery to the inner circumference of the suspension edge 30, and the inner side of the suspension edge 30 is spaced apart from the inner circumference of the suspension edge 30. In the radial direction of the diaphragm 20, a second radial length d2 is formed between the outer side and the inner side of the damping material layer 40.

When the diaphragm 20 vibrates, the energy consuming damping material layer 40 can absorb the vibration wave energy on the diaphragm. When the diaphragm is actuated, the suspension 30 is up and down, and the concave surface of the suspension 30 is in a compressed state. According to the experiment of the inventor, the area of the damping material layer 40 must not exceed the concave area of the suspension 30. One-half, the second radial length d2 does not exceed the radial length D of the suspension, and the effect of eliminating the vibration energy and maintaining the sensitivity of the speaker can be achieved.

The actuation mode of this embodiment is also the same as that of the speaker of the first embodiment. Similarly, the diaphragm 30 generates vibration by the magnetic component, and generates a vibration wave. When the vibration wave reaches the suspension edge 30, the suspension is disposed on the suspension. The layer of damping material 40 on the side 30 reduces the energy of the vibration wave and reduces the chance of residual vibration waves, significantly improving the sound quality of the speaker 10.

Referring to the seventh and eighth figures, a speaker according to a third preferred embodiment of the present invention, only the diaphragm 20, the suspension 30 and the damping material layer are shown in the figure, and the same components are denoted by the same reference numerals, and the present embodiment is not described herein. The difference between the first two embodiments is that the present embodiment has two damping material layers 40, which are a convex damping material layer 40' and a concave damping material layer 40" respectively attached to the hanging edge. The convex surface and the concave surface of the convex surface 40 of the convex surface 30 are not more than two-thirds of the convex surface area of the hanging edge, and the first radial length d1 does not exceed the diameter of the hanging edge 30 To the length D, the area of the concave damping material layer 40" located on the concave surface of the hanging edge 30 does not exceed one-half of the concave area of the hanging edge 30, and the second radial length d2 does not exceed the hanging edge 30. The radial length D. The two damping material layers 40', 40" are disposed from the outer periphery of the suspension edge 30 to the inner circumference, and the inner side of each of the damping material layers is spaced apart from the inner circumference of the suspension.

Thus, when the vibration wave travels to the suspension edge 30, the two damping material layers 40', 40" located on the convex and concave surfaces of the suspension edge can surely consume the energy of the vibration wave, so that the energy is rapidly attenuated, so that Can not rebound again to form Yu Zhenbo, reducing the chance of generating noise, helping to improve the sound quality of the speaker, but can have a better hearing experience.

Referring to FIG. 9 , a diaphragm 20 of a speaker according to a fourth preferred embodiment of the present invention, the structure of the embodiment is mostly as the structure of the first embodiment, except that the damping material layer 40 is also along The periphery of the suspension edge 30 is disposed, but the damping material layer 40 is discontinuously disposed, and is composed of a plurality of equally shaped configurations 42 arranged at equal intervals. In the present embodiment, the damping material layer 40 is a majority. The circular configuration 42 is formed around the suspension 30 as an example (but not limited to this configuration). When the speaker 10 vibrates and the vibration wave is transmitted to the suspension 30, the energy consumption on the suspension 30 is The damping material layer 40 reduces the energy of the vibration wave and prevents the vibration wave from rebounding into the diaphragm 30 again, achieving the goal of improving the sound quality of the speaker 10.

Referring to FIG. 10, a diaphragm 20 of a speaker according to a fifth preferred embodiment of the present invention has a structure substantially the same as that of the fourth embodiment, and the difference is that the damping material layer 40 is Wavy form from the overhang 30 The outer periphery is disposed on the inner circumference, whereby when the vibration wave is transmitted to the suspension 30, the damping material layer 40 slows down the vibration amplitude of the vibration wave, dissolves the energy contained in the vibration wave, and makes it unable to rebound again. In the diaphragm 30, the generation of the residual vibration wave is avoided, and the sound quality of the speaker is surely improved.

Referring to FIG. 11 , a diaphragm 20 of a speaker according to a sixth preferred embodiment of the present invention, the structure of the embodiment is substantially the same as that of the fifth embodiment, and the same points are not described herein except that: The damping material layer 40 is disposed on the at least one surface of the hanging edge along the circumference of the hanging edge 30 in the form of a crucible, and the outer side and the inner side of the hanging edge 30 and the outer circumference and the inner circumference of the hanging side 30 are When the vibration wave reaches the suspension edge 30, the damping material layer 40 attached to the suspension edge 30 can absorb and reduce the energy of the vibration wave, and reduce the vibration amplitude of the suspension edge 30, so that the residual vibration wave is difficult to generate. To give users a better sense of hearing.

Referring to FIG. 12, a diaphragm 20 of a speaker according to a seventh preferred embodiment of the present invention has a structure substantially the same as that of the fourth embodiment, and the difference is that the suspension 30 and the diaphragm 30 are provided. Each of the damping material layers 40 is also disposed around the suspension edge 30. The mass of the damping material layer 40 is disposed along the major axis a and the minor axis b of the suspension edge 30. Thus, it can be seen that the configuration of the speaker does not necessarily have to be circular, and may be an elliptical shape as shown in this embodiment. Only the mass of the damping material layer 40 is symmetrically arranged to absorb the vibration wave evenly. The energy for eliminating the vibration wave is achieved, and the effect of the residual vibration wave is prevented, and the sound quality of the speaker 10 is surely improved.

The form of the damping material layer disclosed in the ninth to twelfth drawings can be applied to the diaphragm of other preferred embodiments of the present invention.

Figure 13 is another preferred embodiment of the speaker of the present invention, and The same component symbol is used. The structure of the speaker of this embodiment is similar to that of the first figure, wherein the cross-sectional shape of the suspension edge 30 in the radial direction is also curved, and is further formed into a wave shape, so that the surface thereof is undulating. At least one layer of damping material 40 is attached to at least one surface (convex or/and concave) of the overhang 30.

The speaker of the present invention is annularly attached to the periphery of the suspension edge and has at least one layer of damping material attached to the outside. When the vibration wave is transmitted to the suspension edge, the high damping property and low elastic modulus of the damping material layer can be confirmed. The suspension of the diaphragm dissipates the energy of the vibration wave, and the vibration wave can no longer rebound back into the diaphragm, so that the speaker achieves ideal deformation and damping, which reduces the noise generated by the residual vibration wave and significantly improves the speaker. The sound quality played allows the user to have a clearer and more comfortable listening experience.

The above examples are merely illustrative of the invention and not to be limiting. The speaker for reducing vibration of the diaphragm provided by the invention is the first structure of the same kind of articles, and improves the lack of existing speakers, and is progressive, and is applied according to law.

10‧‧‧ Speaker

11‧‧‧Frame

14‧‧‧Dust cover

20‧‧‧Densor

30‧‧‧ hanging edge

40‧‧‧Wave material layer

Claims (10)

A speaker for reducing vibration of a diaphragm comprises: a frame; a diaphragm having flexibility, being a thin object disposed in the frame; a suspension having flexibility and a sectional shape thereof The arc has an arc-shaped convex surface and an arc-shaped concave surface; the inner periphery of the hanging edge is connected to the diaphragm, and the outer circumference is connected to the frame; at least one damping material layer is made of high damping and low a material of a modulus of elasticity, the layer of damping material being disposed along the periphery of the suspension and attached to at least one surface of the suspension, the inner side of which is spaced from the inner circumference of the suspension; and the damping material The layer mass is symmetrically attached to the at least one surface of the overhang. The speaker of claim 1, wherein the layer of damping material is attached to the convex surface of the suspension, and the area of the damping material layer does not exceed two-thirds of the convex area of the hanging edge. The speaker of claim 1, wherein the layer of damping material is attached to the concave surface of the suspension, and the area of the damping material layer does not exceed one-half of the concave area of the hanging edge. The speaker according to claim 1, comprising two layers of damping material, respectively a convex damping material layer and a concave concave damping material layer attached to the convex surface of the hanging edge; an area of the convex damping material layer located on the convex surface of the hanging edge Not more than two-thirds of the convex area of the overhang; the area of the concave damping material layer on the concave side of the overhang does not exceed one-half of the concave area of the overhang. The speaker of claim 1, wherein: the layer of damping material is annular. The speaker of claim 1, wherein the layer of damping material is disposed in a continuous or discontinuous manner. The speaker of claim 1, wherein: the layer of damping material is in the form of a wave. The speaker of claim 1, wherein: the layer of damping material is attached to the hanging edge in the form of a crucible. The speaker of any one of claims 1 to 8, wherein the layer of damping material is attached between the outer periphery and the inner periphery of the overhang. A speaker according to any one of claims 1 to 8, wherein the outer side of the layer of damping material is attached to the frame.