WO2020029958A1

WO2020029958A1 - Rectangular rounded-corner centering disk and loudspeaker

Info

Publication number: WO2020029958A1
Application number: PCT/CN2019/099451
Authority: WO
Inventors: 张永春
Original assignee: 张永春
Priority date: 2018-08-07
Filing date: 2019-08-06
Publication date: 2020-02-13
Also published as: CN109218935B; CN109218935A

Abstract

The present invention relates to the technical field of loudspeaker devices, and provided thereby are a rectangular rounded-corner centering disk and a loudspeaker. The rectangular rounded-corner centering disk according to the present invention comprises a base layer, a rigid layer and a compliant layer, wherein the base layer comprises an arc portion, a first connecting portion and a second connecting portion; a plane defined by an inner edge of the arc portion, a plane defined by an outer edge of the arc portion, a plane defined by an inner contour line of the first connecting portion, and a plane defined by an outer contour line of the second connecting portion are all rectangular planes; the right-angle corners of the rectangular planes all transition using arcs; the rigid layer is disposed above the first connecting portion; and the compliant layer is disposed above the second connecting portion. By means of the rectangular rounded-corner centering disk and loudspeaker according to the present invention, the high radial rigidity of an inner ring of the centering disk and the high axial compliance of an outer ring of the centering disk may be effectively improved, thereby reducing the nonlinear offset of a voice coil and increasing the restoring force of a suspension system so as to improve the sound effect quality of the loudspeaker.

Description

Rectangle rounded centering support and speaker

Technical field

The invention belongs to the technical field of loudspeaker equipment, and particularly relates to a rectangular rounded corner centering support piece and a loudspeaker.

Background technique

The speaker is used to complete the conversion between electrical signals and sound signals. It is an energy conversion device. The speaker usually includes a vibration system and a magnetic circuit system. The vibration system includes a combined diaphragm, a voice coil, and a centering support provided at the bottom of the diaphragm. The role of the centering support is to provide compliant C _MS , restoring force and damping R _MS for other suspension systems of the speaker (diaphragm, voice coil, folding ring), so as to keep the linear piston movement as much as possible when it vibrates. One of the indispensable parts of the speaker.

"High axial rigidity and radial rigid rigidity" is the ideal motion state of the centering branch, but it is contradictory in terms of mechanics. Because rigidity and flexibility are contradictory in themselves, it is impossible to manufacture a centering branch that is both soft (compliant) and elastic (rigid rigid) on a material. Although rigid-flexible itself is contradictory, seeking a balanced mechanical vector between rigid-flexible and separating rigid-flexible, rigid force is close to one part, flexible force is close to another part, and the whole is still a balance. Of force.

Therefore, it is necessary to design a centering support piece, which can strengthen the rigid force near the inner ring of the voice coil, reduce the non-linear offset of the voice coil and increase the restoring force of the suspension system, thereby achieving high radial rigidity. The outer ring of the basin frame should strengthen the flexible force to make it easy to vibrate greatly and increase the kinetic energy of the suspension system to achieve high axial compliance, and it can also effectively reduce the resonance frequency f _s .

Summary of the invention

The object of the present invention is to solve at least one of the problems mentioned above, and the object is achieved by the following technical solutions.

The present invention provides a rectangular rounded centering branch, which includes a base layer, a rigid layer, and a compliant layer. The base layer includes an arc portion, a first connection portion extending inwardly from an inner edge of the arc portion, and A second connection portion extending outwardly from an outer edge of the arc portion, a plane surrounded by an inner edge of the arc portion, a plane surrounded by an outer edge of the arc portion, the first The plane surrounded by the inner contour line of the connecting portion and the plane surrounded by the outer contour line of the second connecting portion are both rectangular surfaces, and the right corners of the rectangular surface are all transitioned by circular arcs. One end of the rigid layer is attached above the first connection portion, one end of the compliant layer is attached above the second connection portion, and the other end of the rigid layer and the compliance are The other end of the layer is connected above the arc-shaped portion.

Further, as described above for the rectangular rounded centering branch, a contour line of a cross section formed by the arc-shaped portion and a plane perpendicular to a central axis of the arc-shaped portion is a group of arc segments, and the arc A line segment consists of multiple arcs connected in sequence.

Further, as described above for the rectangular rounded centering branch, the arc segment includes a plurality of arcs symmetrically distributed along a center line of the arc segment, and any two adjacent ones of the arcs The openings of the arcs are oriented in opposite directions, and the radii of the arcs gradually decrease from the center line of the arc segment to the sides.

Further, as described above for the rectangular rounded centering support, the number of the arcs below the rigid layer is greater than the number of the arcs below the flexible layer.

Further, as described above for the rectangular rounded centering support sheet, the material of the base layer and the material of the rigid layer are polyimide fiber cloth.

Further, as described above, the material of the compliant layer is a rectangular rounded centering support, and the material of the compliant layer is silica gel or styrene-butadiene rubber.

Further, as described above for the rectangular rounded centering support, the round center angle corresponding to any one of the plurality of round arcs is 180 °.

Further, as described above for the rectangular rounded centering support piece, the arc segment includes a first arc provided at a center line of the arc segment, and two sides of the first arc are connected in sequence respectively. There are a second arc, a third arc, a fourth arc, and a fifth arc.

Further, as described above, the rectangular rounded centering support piece, the rigid layer is provided on the first arc, the second arc, the third arc, and an inner circle of the arc portion. Above the fourth arc and the fifth arc, the compliant layer is disposed above the fourth arc and the fifth arc of the outer ring of the arc portion.

The invention also provides a loudspeaker. The loudspeaker includes at least one rectangular rounded corner centering support as described above.

By using the rectangular rounded corner centering support piece and the speaker of the present invention, the centering support piece formed by overmolding with various materials can effectively improve the radial high rigidity of the inner ring of the centering support piece and the outer ring. High axial compliance, so that the voice coil reduces non-linear offset and increases the restoring force of the suspension system, and makes it easy to vibrate greatly and increase the kinetic energy of the suspension system to achieve high axial compliance, and Effectively reduce the resonance frequency, thereby improving the sound quality of the speaker.

By adopting the design of the gradual corrugation of the base layer, resonance and stray vibration can also be effectively suppressed.

By setting the rectangular rounded corner centering piece to single-layer mode and multi-layer mode, it can more reasonably adapt to the size of the speaker unit, the number of engines or the Q _{MS of the} suspension system.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the detailed description of the preferred embodiments below. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the invention. Moreover, the same reference numerals are used throughout the drawings to refer to the same parts. In the drawings:

FIG. 1 is a schematic cross-sectional structure diagram of a rectangular fillet centering support in an embodiment of the present invention; FIG.

2 is a schematic structural diagram of a base layer of the embodiment in FIG. 1;

3 is a schematic structural diagram of a rigid layer of the embodiment in FIG. 1;

4 is a schematic structural diagram of a compliant layer in the embodiment shown in FIG. 1;

5 is a schematic structural diagram of a speaker unit when the embodiment in FIG. 1 is used in a multi-layer mode.

Each symbol in the drawing is as follows:

10: base layer, 11: curved portion, 12: first connecting portion, 13: second connecting portion, 111: first circular arc, 112: second circular arc, 113: third circular arc, 114: fourth circular Arc, 115: the fifth arc;

20: rigid layer;

30: compliant layer;

100: rectangular rounded centering support, 200: washer, 300: voice coil.

detailed description

Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a thorough understanding of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art.

First, the following principles and terms are explained to facilitate understanding of the present application.

1. Mechanical mechanics of simple resonance and mechanical mechanics system of speaker unit.

In physics, the simplest model to describe the process of simple harmonic vibration is that the vibrator M is suspended from the surface of the fixed object through the spring K. When the vibrator performs up and down reciprocating motion, the degree of damping D (friction) prevents the vibrator from moving. Its resonance frequency equation is:

fs: resonance frequency, unit: Hz

K: elastic coefficient of spring, unit: N / m

M: mass of the vibrator, unit: kg

In the speaker unit, instead of using elastic force, the force characteristic C is used to express the mechanical characteristics of the suspension support system. The force characteristic C is the inverse of the elastic coefficient, C = 1 / K, that is, the greater the elastic force, the smaller the force, and vice versa. Bigger. At this time, the resonance frequency equation can be described as follows:

Further, using C _{MS to} represent the total force of the speaker unit support system, M _{MS to} represent the total mass of the speaker unit support system, mechanical resistance R _MS replaced damping D, and a simple mechanical model of the speaker unit was obtained. The resonance frequency equation is:

C _MS : The total force of the speaker unit support system is the sum of the forces of the centering support and the folding ring.

M _MS : total mass of the speaker unit supporting system: the sum of the masses of all the suspension systems.

It can be known from the above principle that the frequency of an object is related to its hardness, mass, and dimensions. When it deforms, the elastic force restores it. Elastic force is mainly related to size and hardness, and mass affects its acceleration. In the same shape, the higher the hardness (the smaller the force along the C _MS ), the higher the frequency, and the higher the mass M _{MS the} lower the frequency.

2. T / S parameters of the speaker.

The T / S parameters improved and established by Thiele and Small include relatively complete theoretical data of the speaker's electrical-force-acoustic conversion process, especially in the field of low-frequency direct-radiation speakers, which are generally accepted and adopted by the industrial design community. T / S Among the parameters, Q _ES , Q _MS , and Q _TS are three important parameters.

Q _ES refers to the electrical Q value at the resonance frequency of the speaker unit, that is, the ratio of the dynamic resistance of the voice coil DC resistance RE and the resonance frequency fs. Q _ES indicates the electrical quality of the voice coil, which is mainly represented by the resistance formed by the DC resistance R _E and the inductance L _VC and the back electromotive force R _ES .

Q _MS refers to the mechanical Q value at the resonance frequency of the speaker unit, that is, the ratio of the equivalent resistance of the mechanical loss impedance R _MS of the unit support system to the dynamic impedance at the resonance frequency fs. Q _MS indicates the mass of the voice coil itself and the mechanical resistance R _{MS of the} suspension system (including the suspended parts of the voice coil, diaphragm, centering support, and folded ring).

Q _TS refers to the total Q value at the resonance frequency of the speaker unit, which is the parallel value of Q _ES and Q _MS , where:

Q _TS = (Q _ES × Q _MS ) ÷ (Q _ES + Q _MS ).

From the above equation, i.e., the lower the resistance Q _ES Nigeria smaller output power and efficiency η ₀ _N Ο higher; Q _ES and Q _MS reduction can reduce Q _TS, but not as low as possible Q _MS, Too low Q _MS will cause under-damping and make the speaker's suspension system too active to cause delay, that is, the suspension system's attenuation is slow after the signal stops, and it will continue to vibrate according to inertial force; too high Q _MS will cause over-damping ( Excessive rigidity or mass) restricts the vibration of all the vibration parts of the speaker, affecting the efficiency η ₀ and the resonance frequency fs.

FIG. 1 is a schematic cross-sectional structure diagram of a rectangular rounded corner centering support in an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a base layer of the embodiment in FIG. 1. FIG. 3 is a schematic structural diagram of the rigid layer of the embodiment in FIG. 1. FIG. 4 is a schematic structural diagram of a compliant layer in the embodiment shown in FIG. 1. With reference to FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the rectangular rounded centering support 100 in this embodiment includes a base layer 10, a rigid layer 20, and a compliant layer 30. The base layer 10 includes an arc-shaped portion 11, a first connection portion 12 extending inwardly from an inner edge of the arc-shaped portion 11, and a second connection portion 13 extending outwardly from an outer edge of the arc-shaped portion 11. The plane surrounded by the inner edge of the arc-shaped portion 11, the plane surrounded by the outer edge of the arc-shaped portion 11, the plane surrounded by the inner contour of the first connecting portion 12, and the outer contour of the second connecting portion 13 The enclosed planes are all rectangular surfaces, and the right corners of the rectangular surfaces are transitioned by circular arcs. One end of the rigid layer 20 is attached to the first connecting portion 12 and one end of the compliant layer 30 is attached. It is above the second connecting portion 13, and the other end of the rigid layer 12 and the other end of the compliant layer 13 are respectively attached to the arc-shaped portion 11 and connected to each other.

The centering support in this embodiment mainly provides compliance, restoring force, and damping for other suspension systems (diaphragms, voice coils) of the loudspeaker, so as to keep the suspension system moving as linearly as possible when the suspension system vibrates. The outer edge of the rectangular fillet centering support 100 is used to be fixed on a rectangular fillet basin frame. The inner edge of the rectangular fillet centering support 100 is provided on the bottom or chassis of a rectangular pot-shaped fillet diaphragm. Both the rectangular pot-shaped round-corner diaphragm and the rectangular round-corner basin frame adopt a rectangular arc structure. Therefore, the inner and outer edges of the rectangular round-corner centering support 100 in this embodiment both adopt a rectangular round-corner structure.

By providing a rigid layer 20 on the top of the first connecting portion 12 close to the voice coil, the rigidity of the rectangular rounded centering stay 100 can be improved, the voice coil can reduce non-linear offset and increase the restoring force of the suspension system. To achieve high rigidity in the radial direction. By compliantly setting the compliant layer 30 above the first connection portion 13 near the basin frame, the flexible force of the rectangular rounded centering support 100 can be increased, making it easy to vibrate greatly and increasing the kinetic energy of the suspension system to achieve High axial compliance and effective reduction of resonance frequency.

Further, as shown in FIG. 1, a contour line of a cross section formed by the arc-shaped portion 11 of the base layer 10 and a plane perpendicular to the central axis of the arc-shaped portion 11 in this embodiment is a group of arc segments. Consists of multiple arcs connected in sequence. The arc segment includes a plurality of arcs symmetrically distributed along the center line of the arc segment. The openings of any two adjacent arcs in the arcs are facing in opposite directions, and the radius of the arcs is determined by the arc. The centerline of the line segment gradually decreases towards both sides.

Among them, the number of arcs and the specific distribution position are determined by the specific radial rigidity and axial compliance to be provided by the centering support. The specific number and distribution of arcs can be set according to the actual situation.

Specifically, the arc segment in this embodiment includes a first arc 111 provided at a center line of the arc segment, and two sides of the first arc 111 are respectively connected with a second arc 112 and a third arc in this order. 113. The fourth arc 114 and the fifth arc 115. Among them, a first circular arc 111, two second circular arcs 112, two third circular arcs 113, and a fourth circular arc 114 provided on the inner ring (right side in the paper surface direction of FIG. 1) of the arc portion 11. A fifth arc 115 and a fifth arc 115 are provided below the rigid layer 20, and a fourth arc 114 and a fifth arc 115 are provided on the outer ring of the arc portion 11 (left side in the paper surface direction in FIG. 1). Under the compliant layer 30. The center angles of the first arc 111, the second arc 112, the third arc 113, the fourth arc 114, and the fifth arc 115 are all 180 °, so as to ensure that the arc segment runs from the center line. The height and width of the two sides gradually decrease, forming a gradual structure instead of a structure of equal width and height. Because this gradual wave design can effectively suppress or break the propagation path and natural frequency of simple harmonic motion and particle motion, it can suppress the generation of resonance and stray vibration.

In this embodiment, in order to match the structural form of the base layer 10, the rigid layer 20 is also provided with a first circular arc 111, two second circular arcs 112, two third circular arcs 113, and A fourth circular arc 114 and a fifth circular arc 115 of the inner circle have the same arc-shaped structure, so as to ensure that the rigid layer 20 and the base layer 10 are closely adhered to each other to increase the rigidity of the rectangular rounded centering support 100 after bonding. . The compliant layer 30 is also provided with the same structure as a fourth circular arc 114, a fifth circular arc 115, and the second connecting portion 13 of the outer ring of the arc portion 11, so as to ensure that the compliant layer 30 and the base layer 10 are in phase. Adhering closely and increasing the compliance of the rectangular rounded centering support piece 100 after being adhered.

When the rigidity of the rectangular fillet centering support 100 needs to be increased or decreased, the number of arcs on the rigid layer 20 can be increased or decreased, and the number of arcs on the compliant layer 30 can be adjusted (reduced or increased) accordingly. When you need to increase or decrease the compliance of the rectangular fillet centering support 100, you can increase or decrease the number of circular arcs on the compliance layer 30 and the base layer 10, and adjust (reduce or increase) the rigid layer and The number of circular arcs on the base layer 10. In addition, you can also adjust the thickness by changing the thickness of the rigid layer and the compliant layer.

Further, the material of the base layer 10 in this embodiment is a polyimide fiber cloth. The polyimide fiber cloth has consistent mechanical stability and good restoring force, has strong tear resistance, and is less affected by temperature and humidity. Etc. The base material can also choose other materials, such as cotton cloth or other synthetic fiber materials. The material of the rigid layer 20 is polyimide fiber cloth or other fiber materials, and the rigidity in the radial direction can be further increased or adjusted. The material of the compliant layer 30 is silica gel or styrene-butadiene rubber in order to increase or adjust the axial flexibility and compliance, and can further reduce the resonance frequency and the resonance of the basin frame caused by the vibration of the suspension system.

The present invention also provides a loudspeaker, which includes the rectangular rounded corner centering bracket 100 described above. When the size of the speaker unit is small or the number of engines is small, a single-layer mode may be adopted, that is, a rectangular rounded corner centering support 100 is used. When the size of the loudspeaker unit is large or the number of engines is large, a multilayer mode of more than two layers may be adopted, that is, two or more rectangular rounded corner centering brackets 100 are stacked and used at a certain distance. 5 is a schematic structural diagram of a speaker unit when the embodiment in FIG. 1 is used in a multi-layer mode. As shown in FIG. 5, the speaker unit in this embodiment includes three rectangular rounded corner centering brackets 100 arranged in order from top to bottom, and adjacent rectangular rounded corner centering brackets 100 are arranged at intervals through a washer 200. . The bottom of the rectangular rounded centering support 100 is provided with a voice coil 300. The top of the voice coil 300 passes through a through hole surrounded by the inner edge of the rectangular rounded centering support 100 and contacts the bottom of the diaphragm or the chassis. To match the diaphragm and voice coil settings at different heights.

According to the formula Q _TS = (Q _ES × Q _MS ) ÷ (Q _ES + Q _MS ), it can be known that a change in any one of the parameters Q _ES and Q _MS will affect Q _TS . Since Q _ES is an electrical parameter, its related parts are voice coils, and the Q _MS value is related to the centering support of the present invention. Assuming that the Q _ES parameter is unchanged, changing the Q _MS parameter value Will cause the parameters of Q _TS to change accordingly. The rigid layer of the centering support will increase the Q _MS value, and the flexible layer will decrease the Q _MS value. Under the condition that the total mass of the suspension system is unchanged, the Q of the rectangular rounded centering support according to the present invention _{The MS} value is a variable and a constant. When changing or adjusting the rigid layer and the flexible layer of the centering piece, the Q _MS value is a variable. Once fixed, the Q _MS value is a constant.

Further, the total force along C _MS, the relationship between the total mass M _MS _MS R & lt mechanical resistance and mechanical described in the case where the total mass M _MS _MS R & lt mechanical resistance and mechanical suspension system unchanged, is determined by the flexible layer and the rigid layer the total force obtained cis C _MS larger Q _MS and Q _TS lower value. Therefore, the total force compliance C _MS can be changed by changing the flexible layer and the rigid layer, so that the variable range of the total mass M _MS of the suspension system is larger, the resonance frequency fs can be reduced more, and the acoustic performance can be improved.

The gradual wave design can also effectively suppress resonance and stray vibration. By using single-layer mode and multi-layer mode, it can more reasonably adapt to the size of the speaker unit, the number of engines, or the Q _{MS of the} suspension system.

The above are only the preferred embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of changes or changes within the technical scope disclosed by the present invention. Replacement should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

A rectangular rounded corner centering branch is characterized in that it includes a base layer, a rigid layer, and a compliant layer. The base layer includes an arc-shaped portion, a first connection portion extending inwardly from an inner edge of the arc-shaped portion, and A second connecting portion extending outwardly from an outer edge of the arc-shaped portion, a plane surrounded by an inner edge of the arc-shaped portion, a plane surrounded by an outer edge of the arc-shaped portion, the first connection The plane surrounded by the inner contour line of the part and the plane surrounded by the outer contour line of the second connection part are both rectangular surfaces, and the right corners of the rectangular surface are transitioned by arcs, and the rigidity One end of the layer is attached above the first connection portion, one end of the compliant layer is attached above the second connection portion, and the other end of the rigid layer and the compliant layer The other end is connected above the arc-shaped portion.
The rectangular fillet centering support according to claim 1, wherein a contour line of a cross section formed by the arc portion and a plane perpendicular to a central axis of the arc portion is a set of arc segments The arc segment is composed of a plurality of arcs connected in sequence.
The rectangular fillet centering support according to claim 2, wherein the arc segment includes a plurality of arcs symmetrically distributed along a center line of the arc segment, and any of the arcs The openings of two adjacent arcs are facing in opposite directions, and the radius of the plurality of arcs gradually decreases from the center line of the arc segment to the sides.
The rectangular fillet centering support according to claim 3, wherein the number of the arcs below the rigid layer is greater than the number of the arcs below the flexible layer.
The rectangular rounded centering support sheet according to any one of claims 1-4, wherein the material of the base layer and the material of the rigid layer are polyimide fiber cloth.
The rectangular rounded centering support sheet according to any one of claims 1-4, wherein the material of the compliant layer is silica gel or styrene-butadiene rubber.
The rectangular rounded centering support according to any one of claims 2-4, wherein a round center angle corresponding to any one of the plurality of round arcs is 180 °.
The rectangular fillet centering support according to any one of claims 2-4, wherein the arc segment includes a first arc disposed at a center line of the arc segment, and Two sides of the first arc are respectively connected with a second arc, a third arc, a fourth arc, and a fifth arc in this order.
The rectangular fillet centering support according to claim 8, wherein the rigid layer is provided on the first arc, the second arc, the third arc, and the arc Above the fourth arc and the fifth arc of the inner circle of the portion, the compliance layer is provided above the fourth arc and the fifth arc of the outer circle of the arc portion .
A loudspeaker, characterized in that the loudspeaker comprises at least one rectangular rounded corner centering piece according to any one of claims 1-9.