TWI386075B - Eliminate the vibration of the diaphragm - Google Patents

Description

Attenuating the vibration of the diaphragm

The present invention relates to a speaker device, and more particularly to a speaker that can reduce the residual vibration of the diaphragm of the speaker.

Press, the horn is a device that converts electrical energy into sound. The structure of the horn has a frame, a magnetic component, a vibrating membrane and a hanging edge. The periphery of the diaphragm is connected to the frame by the hanging edge, and the suspension is a flexible material, so that the diaphragm is vibrated on the frame. The sound generated by the magnetic force generated by the magnetic component pushes the diaphragm to generate sound.

When the diaphragm vibrates, vibration waves are generated to travel outward along the diaphragm to convey to the suspension. Most of the horns are difficult to properly match the impedance of the suspension and the diaphragm. Therefore, when the vibration wave passes through the diaphragm and reaches the suspension, the energy of the vibration wave cannot be quickly eliminated, resulting in the residual vibration. Produced, and then returned to the diaphragm from the suspension. Yu Zhenbo will become the noise of the subsequent vibration wave and affect the sound quality.

The invention aims to solve the above-mentioned problem, and the main purpose thereof is to provide a horn, which can quickly reduce the vibration of the diaphragm to eliminate noise.

The horn provided by the present invention has a frame; a diaphragm member whose outer periphery is mounted in the frame with a flexible suspension edge and is vibratable relative to the frame; The present invention is characterized in that: a plurality of strips are arranged on the surface of the diaphragm of the diaphragm member in an arrangement of at least one turn, and the longitudinal direction of each strip and the radial direction of the diaphragm member are not 90 degrees. The angle of each strip; and the length of each strip is not more than three-fifths of the radius of the surface of the diaphragm. Thereby, the strips can change the traveling direction of the vibration wave, thereby rapidly reducing the vibration wave, reducing the residual vibration of the vibration wave, and improving the sound quality of the speaker.

The surface of the diaphragm member may be a single plane or a curved surface, or two planes or curved surfaces that are connected but have a discontinuous slope.

Preferably, the strip and the diaphragm member are made of different materials, in particular, the rigidity of the strip is higher than the rigidity of the diaphragm member, so that the vibration wave changes direction or forms a scattered wave when passing through different media.

Each strip is arranged obliquely, and the longitudinal direction of the strip and the direction of the ray of the diaphragm member are at an angle of 20 to 70 degrees.

The strips provided on the diaphragm member may be odd; or an even number but not equally spaced to avoid another vibrational resonance.

For a better understanding of the objects, features and advantages of the present invention, the preferred embodiments of the present invention are described in the following.

The first figure is a perspective view of a preferred embodiment of the invention.

The second figure is the top view of the first figure.

The third drawing is a top view of a diaphragm member in accordance with a preferred embodiment of the present invention.

The fourth figure is a cross-sectional view taken along line 4-4 of the third figure.

The fifth and sixth figures are also top views of the diaphragm member of the first figure.

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

Figure 8 is a perspective view of another preferred embodiment of the present invention.

The ninth drawing is a top view of the diaphragm member of the eighth figure.

Figure 11 is a top plan view of a diaphragm member according to still another preferred embodiment of the present invention.

Figure 11 is a top plan view of a diaphragm member in accordance with still another preferred embodiment of the present invention.

Referring to the first and second figures, a horn (10) according to a preferred embodiment of the present invention has a frame (20), a magnetic component (not shown), a diaphragm member (30) and a suspension. (40). The magnetic component is mounted in the frame (20) and includes a magnet and a magnet a coil that produces a magnetic force that attracts or repels. The diaphragm member (30) is mounted to the opening of the frame (20); the suspension (40) is annular, the outer periphery is connected to the frame (20), and the inner periphery is connected to the diaphragm member (30). The suspension (40) is a flexible material that allows the diaphragm member to vibrate on the frame. When the magnetic force of the magnetic component pushes the diaphragm member to vibrate, the compressed air generates sound waves.

Referring to Figures 3 and 4, the diaphragm member (30) is a thin object made of metal, polymer material, paper or fiber (carbon fiber or fiberglass). The diaphragm member (30) disclosed in this embodiment has a diaphragm (32) and a dust cap (35). The dust cover (35) is disposed in the center of the diaphragm (32), the diaphragm and the dust cover. Form the inner and outer rings. The diaphragm is a continuous curved surface (slope continuous) structure, and the dust cover is another continuous curved surface structure. Therefore, the diaphragm member (30) has two diaphragm surfaces which are connected but have a discontinuous slope, respectively It is the curved surface (F) of the diaphragm (hereinafter referred to as the outer ring diaphragm surface or simply the outer ring surface) and the curved surface (F') of the dust cover (hereinafter referred to as the inner ring diaphragm surface or simply the inner ring surface). Moreover, the junction of the periphery of the dust cap (35) and the diaphragm (32) is a ring actuation (36) which generally corresponds to the coil of the magnetic assembly.

The invention further comprises a plurality of strips (50) disposed on the surface of the diaphragm member (30) in a suitably distributed manner. The surface of the diaphragm member referred to in the present invention may be the front or back surface of the diaphragm member. In this embodiment, the strip (50) is simultaneously mounted on the curved surface (F) of the vibrating membrane and the curved surface (F') of the dustproof cover, but may alternatively be provided only on one of the curved surfaces. The strip (50) of the embodiment is provided in two turns, the strips (50) arranged on the outer ring are arranged on the outer ring surface (F), and the strips (50') arranged on the inner ring are arranged on the inner ring surface. (F'). The inner and outer ring strips are delimited by the actuation point (36).

The strips and the diaphragm members provided on the surface of the diaphragm member are preferably made of different materials, and the rigidity of the strip is superior to the rigidity of the diaphragm member.

Referring to the third figure, each of the strips (50) is disposed obliquely with an angle θ between the longitudinal direction and the radial direction (R) of the diaphragm member (30) between 20 and 70 degrees.

Referring to the fifth figure, on the effective radius (L1) of the outer ring surface (F) (from the actuation point (36) to the outer circumference of the diaphragm), the set length (S1) of each outer ring strip (50) does not exceed The effective radius (L1) is three-fifths, and the set length refers to the length in which the strip is projected in the radial direction of the diaphragm member. On the inner ring surface (F') effective radius (L2) (from the dust cap center (37) to the actuating portion (36)), the set length (S2) of each inner ring strip (50') is not More than three-fifths of the effective radius (L2). In general, on the radius (L) of the diaphragm member (30), the total length of the single strip (50) (50') located on the inner and outer rings does not exceed five points of the radius (L). three. For example, the total length of the outer ring strip of the designation (a) and the inner ring strip of the designation (b) does not exceed three-fifths of the radius (L).

In addition, referring to the sixth figure, the inner end of the strip (50) of the outer ring is located on the same function curve (C). The function curve (C) is determined by the shape of the diaphragm member. When the diaphragm member (30) has a circular or conical configuration, the function curve (C) is circular. If the diaphragm member is elliptical or elongated, the function curve is elliptical. Similarly, the outer ends of the inner ring strips can also lie on the same function curve. In practice, in order to express different characteristics, at least the same end of the same strip can be located on the same function curve, for example, only the inner end of the strip is on a function curve; or only the outer end of the strip is on a function curve. Or the inner end of the strip is on a function curve, and the outer end of the strip is on another function curve.

Referring to the seventh figure, when the horn is actuated, the diaphragm member (30) vibrates. At this time, the diaphragm member will generate a vibration wave, and the actuation portion (36) is divided into vibration waves (W) and (W' ) travels on the outer ring surface (F) and the inner ring surface (F'). The vibration wave (W) travels outward on the outer ring surface (F). When the outer ring strip (50) is touched, the originally pure and concentrated vibration wave will be reflected or broken to change the traveling direction to form a scattered wave. (including reflected waves) (D). In addition, the strip and the diaphragm member are made of different materials, and also provide the direction change of the vibration wave when passing through different media.

When the vibration wave (W) is converted into a scattered wave (D), its direction changes, and thus the travel distance on the outer ring surface (F) is lengthened, and the damping characteristics of the diaphragm member (30) and the suspension edge (40) are utilized. The energy of the vibration wave achieves the purpose of rapidly reducing the vibration energy.

More specifically, since the traveling distance of the vibration wave (including the scattered wave) on the outer ring surface is lengthened, the impedance of the diaphragm member is increased, and the energy of the acceleration vibration wave is attenuated. Moreover, when the vibration wave travels to the overhang, the energy of the vibration wave is reduced by the damping of the suspension. If the energy has not been lost, the residual vibration wave that is transmitted back from the suspension edge to the diaphragm member will be absorbed and broken again by the strip material, achieving the purpose of rapidly reducing the vibration energy. As a result, Yu Zhenbo's chances of occurrence are greatly reduced, reducing noise generation.

In addition, the scattered waves (D) also interfere with the original vibration waves, and the energy of the vibration waves is also attenuated more quickly.

When the vibration wave (W') travels inward on the inner ring surface (F'), it will also touch the inner ring strip (50'), and the originally pure and concentrated vibration wave will reflect or be broken to change the traveling direction. , forming a scattered wave (including reflected waves) (D'). When Yu Zhenbo (W') is transformed into a scattered wave (D'), its direction changes, so the travel distance on the inner ring surface (F') is lengthened, and the diaphragm member (30) and the overhang (40) are reused. The damping characteristic consumes the energy of the residual vibration wave and achieves the purpose of rapidly reducing the vibration energy.

The number of outer ring strips (50) and inner ring strips (50') is preferably an odd number to prevent vibration resonance. However, the number of the openings may be an even number, and the outer ring strips (50) and the inner ring strips (50') may have different pitches to prevent vibration resonance.

Moreover, the two ends of each outer ring strip (50) are not connected to the inner and outer periphery of the outer ring surface (F) (the inner periphery of the outer ring surface is the innermost surface of the outer ring surface), and the spacing is still maintained; The vibrating membrane still has considerable flexibility, is not too hard, can avoid the frequency reduction of the vibrating membrane, and prevents the high frequency rapid decay of the vibrating membrane. Similarly, the ends of the inner ring strips (50') are not connected to the center (37) and the outer circumference of the inner ring surface (F') (the center of the inner ring surface is the innermost surface of the inner ring surface), so It affects the bandwidth and high frequency response of the dust cover (35).

Annexes I and II are the test results of the inventors. Annex 1 shows the test data of the speaker without the strip; the second is the test data of the speaker with the strip of the invention. By applying the horn of the invention, the residual vibration of the vibration wave is rapidly reduced, so the noise is reduced, especially in the earphone ear frequency range, and the sound quality is improved.

Referring to the eighth and ninth drawings, another preferred embodiment of the horn (60) provided by the present invention also includes a frame (62), a diaphragm member (64), and a hanging edge (66). ) and several strips (68). The diaphragm surface (F") of the diaphragm member (64) of the embodiment is a single continuous surface, and the diaphragm member may be a planar structure or a curved structure, and if it is a curved structure, it may be a central convex or Central concave form.

The angle θ between the longitudinal direction of each strip (68) and the radial direction (R) of the diaphragm member (64) is between 20 and 70 degrees. Further, the set length (S3) of each strip is not more than three-fifths of the radius (L') of the diaphragm member (64).

The actuating portion of the diaphragm member may be the outer circumference of the diaphragm member (641) or the center of the diaphragm member. When the actuation point is located on the outer circumference of the diaphragm member, the vibration wave travels from the outside to the inside on the diaphragm surface (F'), and the contact strip (68); when the actuation is at the center thereof, the vibration wave It travels from the center of the diaphragm surface and will touch the strip. The effect of the vibration reduction in the present embodiment can be understood from the description of the previous embodiment, and will not be described again.

Referring to FIG. 10, a top view of a diaphragm member (70) and a strip (72) according to another preferred embodiment of the present invention, the strip (72) may have a configuration of unequal width, not equal in width. To be limited, the two ends (74) may have a circular arc shape, a pointed shape or an appropriate shape.

The strip of the present invention may be in the form of a straight strip as shown in the foregoing embodiments; or the top view of the diaphragm member (80) and the strip (82) according to still another preferred embodiment of the present invention in the eleventh embodiment. The strip (82) can be an arc strip.

The horn provided by the invention can change the vibration wave traveling direction of the diaphragm member by the arrangement of the strip material, thereby effectively reducing the vibration wave and the residual vibration wave, thereby reducing noise and improving sound quality.

The embodiments are merely illustrative of the invention and are not intended to be limiting.

In summary, the present invention is the first of its kind and has a progressive effect, and is filed according to law. Pray for the review of the members of the board of directors to encourage the Chinese people to innovate the invention, to take a lengthy examination, and to grant patents as an early prayer.

horn. . . (10) (60)

frame. . . (20) (62)

Diaphragm components. . . (30)(64)(70)(80)

Vibration film. . . (32)

Dust cover. . . (35)

Actuation. . . (36)

Overhang. . . (40) (66)

Strips. . . (50)(68)(72)(82)

Outer ring diaphragm surface. . . (F)

Inner ring diaphragm surface. . . (F’)

Diaphragm surface. . . (F")

radius. . . (L)(L')(L1)(L2)(L3)

length. . . (S1) (S2) (S3)

Function curve. . . (C)

Radial. . . (R)

Zhenbo. . . (W)

Scattered wave. . . (D)

The first figure is a perspective view of a preferred embodiment of the invention.

The second figure is the top view of the first figure.

The third drawing is a top view of a diaphragm member in accordance with a preferred embodiment of the present invention.

The fourth figure is a cross-sectional view taken along line 4-4 of the third figure.

The fifth and sixth figures are also top views of the diaphragm member of the first figure.

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

Figure 8 is a perspective view of another preferred embodiment of the present invention.

The ninth drawing is a top view of the diaphragm member of the eighth figure.

Figure 11 is a top plan view of a diaphragm member according to still another preferred embodiment of the present invention.

Figure 11 is a top plan view of a diaphragm member in accordance with still another preferred embodiment of the present invention.

horn. . . (10)

frame. . . (20)

Diaphragm components. . . (30)

Vibration film. . . (32)

Dust cover. . . (35)

Actuation. . . (36)

Overhang. . . (40)

Strips. . . (50)

Claims (13)

A horn for mitigating vibration of a diaphragm includes: a frame; a diaphragm member mounted in the frame, the outer periphery of which is coupled to the frame by a flexible suspension to vibrate on the frame; The diaphragm member has at least one diaphragm surface having a continuous slope; a predetermined number of strips are disposed on the diaphragm surface of the diaphragm member in an arrangement of at least one turn, and the rigidity thereof is superior to the rigidity of the diaphragm member; The strip is disposed obliquely, the longitudinal direction of which is not at an angle of not more than 90 degrees with respect to the radial direction of the diaphragm member; in the radial direction of the diaphragm member, the length of each strip is not greater than the diaphragm provided thereto Three-fifths of the radius of the surface. The horn of the vibration-reducing vibration wave according to claim 1, wherein the diaphragm member has two diaphragm surfaces which are connected but have a discontinuous slope, and the surface of the two diaphragms is an inner and outer ring. The strips are disposed on the outer ring diaphragm surface; the length of each strip is not more than three-fifths of the effective radius of the outer ring diaphragm surface. The horn for attenuating the vibration of the diaphragm according to claim 2, wherein: the surface of the inner ring diaphragm is also provided with a predetermined number of strips, and the length of each strip is not greater than the surface of the inner diaphragm Three-fifths of the radius. The horn of the vibration-reducing vibration wave according to claim 1, wherein the diaphragm member has two diaphragm surfaces which are connected but have a discontinuous slope, and the surface of the two diaphragms is an inner and outer ring. Provided; the strips are disposed on the surface of the inner ring diaphragm. The horn for attenuating the vibration of the diaphragm as described in claim 1 or 2 or 3 or 4, wherein the two ends of the strip are not connected to the innermost and outer periphery of each of the diaphragm surfaces. Attenuating the vibration of the diaphragm as described in claim 1 or 2 or 3 or 4 In the case where at least the same end of the strip arranged in the same circle is on a function curve. The horn for attenuating the vibration of the diaphragm as described in claim 1 or 2 or 3 or 4, wherein: the longitudinal direction of each of the strips and the radial direction of the diaphragm member are between 20 and 70 degrees. between. The horn for attenuating the vibration of the diaphragm as described in claim 1 or 2 or 3 or 4, wherein the number of the strips arranged on the same circumference of each of the diaphragms is an odd number. A horn for mitigating vibration of a diaphragm as described in claim 1 or 2 or 3 or 4, wherein: the number of strips arranged on the same circle on each surface of the diaphragm is an even number, and the strips have Unequal intervals. For example, the horn of the vibration-reducing vibration wave described in the above-mentioned Item 1 or 2 or 3 or 4, wherein each of the strips may have a configuration of equal width or unequal width. For example, the speaker for reducing the vibration of the diaphragm according to Item 5 of the special scope is applicable, wherein: each of the strips may have a configuration of equal width or unequal width. For example, the horn of the vibration-reducing vibration wave described in the above-mentioned Item 1 or 2 or 3 or 4, wherein each of the strips may be straight or curved. For example, the speaker for reducing the vibration of the diaphragm described in the above item 5, wherein each of the strips may be straight or curved.