Patent Publication Number: US-2023164505-A1

Title: Method for manufacturing loudspeaker having wire damper with locally adjustable elasticity

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part of U.S. patent application Ser. No. 17/107,960, filed on Dec. 1, 2020, which is incorporated herewith by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a method for manufacturing a loudspeaker, and more particularly, to a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity. 
     2. The Prior Arts 
     In the general moving coil loudspeaker, the principle that the reaction force of a fixed magnetic field causes another magnetic field to move in the opposite direction (i.e., opposite magnetisms attract each other, and like magnetisms repels each other) is used to produce sound. Further, the power alternating current generated by the power amplifier is transmitted to the voice coil through a wire to change the polarity of the magnetic field, such that the voice coil generates a reaction force against the fixed magnetic region generated by the magnetic circuit device. The forward pulse causes the diaphragm move outward relative to the magnet, while the backward pulse causes the diaphragm move inward. When the voice coil pushes the diaphragm to reciprocate, the diaphragm pushes air, and the air pressure changes to form sound waves. The damper is responsible for maintaining the correct position of the voice coil in the gap of the magnet core, ensuring that the voice coil reciprocates along the axis direction when being forced. 
     However, in the conventional loudspeaker, the wire is suspended in the air without any support, so that the wire alone bears the vibration force transmitted from the voice coil. Thereby, after the voice coil moves rapidly and frequently for a period of time, the wire is easy to fatigue and be broken. 
     In order to solve the above problems, in this industry, it has begun to develop the process of fixing the wires on the damper during the manufacturing procedure of the wire damper. First, a base material is impregnated in a liquid synthetic resin to allow the base material to absorb the synthetic resin; then, the base material absorbing the synthetic resin is dried and hardened; subsequently, the wire is fixedly adhered on the surface of the base material; next, the base material as well as the wire are subjected to hot pressing by the thermoforming device to form a wire damper; finally, the wire damper is cut from the base material by a cutting device. By using the main body of the wire damper to support the wire, the wire has an increased fatigue resistance and becomes not easy to be broken. 
     However, since the wire is fixedly adhered on the wire disposing area of the main body of the wire damper, when the wire damper is formed on the base material by thermoforming of a thermoforming device, the wire cannot stretch the warp yarns on two sides of the wire disposing area toward outer sides. As a result, the wire protrudes from the surface of the main body of the wire damper, causing the wire to be easily damaged by the hot pressing of the thermoforming device. The wire damper is unusable due to damage to the wire and must be scrapped, which is quite wasteful. It can be seen that the wire damper manufactured by conventional method has a low yield and a high manufacturing cost. 
     Furthermore, the wire is harder than the main body of the wire damper, and the elasticity and toughness of the wire are worse than that of the main body of the wire damper, so that under the condition that the wire cannot stretch the warp yarns on two sides of the wire disposing area toward outer sides, the combination of the wire disposing area and the wire is harder than the other areas of the main body of the wire damper, and the elasticity and toughness of the combination of the wire disposing area and the wire are worse than that of other areas of the main body of the wire damper. Therefore, the hardness, elasticity, and toughness of the wire damper are non-uniform, resulting in non-uniform elastic resilience and fatigue resistance of the wire damper, which causes the wire damper to be easy to deform, thereby affecting the output sound quality of the loudspeaker. 
     In addition, the thermoforming device requires larger pressing force to be able to form the wave crests and troughs of the wave structures on the base material, while the thermoforming device requires less pressing force to be able to form the inner sidewalls and the outer sidewalls on the base material. It can be seen that the pressing force of the thermoforming device is non-uniform, so that the thermoforming device non-uniformly applies force to the wire, which causes the following two problems: first, the wire is easily deformed due to being non-uniformly forced; and second, the deformed wire will cause the overall structure of the wire damper to be unbalanced. The above two problems will affect the output sound quality of the loudspeaker. 
     Para. [0055] in the US2002/0034315A1 recites “After the cloth 70 containing the conductors 66 is woven, it is impregnated with a thermosetting phenolic resin diluted with a solvent. The cloth 70 is then dried in a warm air oven to flash off the solvent, leaving a dry, tack free surface.” Para. [0056] in the US2002/0034315A1 recites “The cloth 70 is then molded in a heated tool to form the concentric convolutions of spider 40, and to cure the thermosetting resin. The spider 40 is then trimmed to create a hole 44 in its center and to remove the excess material from its outside diameter 45.” Para. [0057] in the US2002/0034315A1 recites “As illustrated in  FIG.  5   , to form the interconnection between the voice coil wire 43 and the conductive cords 62 incorporated in the spider 40, the voice coil wire 43 is stripped of insulation and adhesive, using conventional techniques in the area 42 where it lies adjacent the spider 40. A small droplet 41 of conductive adhesive is applied to each voice coil lead 43.” 
     From the above paragraphs in the US2002/0034315A1 and its FIGS. 3a-b, 4a-b and 6a-b, it is clear that the conductive cores and yarns are woven together at the same time to form the cloth. Therefore, in the woven process, the elastic adjustment area of the loudspeaker spider is formed by controlling a distance between the conductive cores and yarns. 
     Para. [0024] in the US2002/0034315A1 recites “ FIGS.  3   a - b    illustrate an enlarged plan view and cross section, respectively, of a spider cloth with two sets of seven parallel conductive strands, woven as an integral part of the warp or weft, according to the present invention.” Para. [0025] in the US2002/0034315A1 recites “ FIGS.  4   a - b    illustrate an enlarged plan view and a cross section, respectively, of a spider cloth with two sets of seven conductive strands twisted together to form two flexible conductive cords, woven as an integral part of the warp or woof, according to the present invention” Para. [0024] in the US2002/0034315A1 recites “ FIGS.  6   a - b    illustrate an enlarged plan view and cross-section, respectively, of a spider cloth with two sets of seven conductive strands twisted together to form two flexible conductive cords, woven as an integral part of the warp or woof, with a portion of the length of each cord left as a “float” on the surface of the cloth, according to the present invention.” 
     From the above paragraphs in the US2002/0034315A1, it never discusses the depths of the wave crests, wave troughs, inner sidewalls and outer sidewalls of the wave structures. In fact, from the figures of the US2002/0034315A1, the conductive cores are woven and fixed with the yarns to form the cloth. As a result, the depths are all the same in the hollow portions of the wave structures disclosed in the US2002/0034315A1, and the depth of the hollow portions at any position on the wave structures are symmetrical. Therefore, the loudspeaker spider has some problems recited in the above para. [0007] of the present application. 
     Para. [0022] in the US2006/0159300A1 recites “Again referring to  FIG.  5   , the annular spider 1 is composed of a first surface lining 11, a second surface lining 12, and at least one lead wire 2, where the surface lining can be a sheet of cloth or other fabric material, which is pre-treated with copolymerized elastomer and then dried. The upper and lower negatively shaped mould halves 3, 4 respectively have multiple first and second slots 31, 41 on the mould surfaces. The positions of the first slots 31 and second slots 41 shall be aligned, and the slots are preferably in half-circle shape. When the two mould halves 3, 4 are combined, multiple tunnels are formed to hold the lead wires passing through interspaces between two bonded surface linings 11, 12.” Para. [0023] in the US2006/0159300A1 recites “In accordance with the first embodiment, before the spider is press formed, the second or lower surface lining 12 is placed on the lower or second negatively shaped mould surface 4, and then multiple lead wires 2 are placed on the lower surface lining 12 and lined up with the slots 41 on the lower mould half 4, and then the first or upper surface lining 11 is laid over the second lining 12 covering the lead wires 2, and then the two mould halves 3, 4 are combined and heat is applied, so that the two linings 11, 12 are bonded together to form a wavy spider 1 with sandwiched lead wires 2, only having the two ends of the lead wires 2 exposed outside the inner rim and outer rim.” 
     Based on the above features, the spider with leadwires sandwiched in the US2006/0159300A1 can achieve some advantages: “Since each mould half has the positions of slots on the mould surface to match the lead wires, so when the two mould halves are combined, the lead wires between the two surface linings are fitted into complimentary slots. This can prevent the press mould from damaging or causing deformation to the lead wires in the press forming process. Therefore, the lead wires can be more durable and the quality of sound reproduction of the speaker will be improved.” recites in the para. [0011]. 
     However, the spider with leadwires sandwiched has some problems recited in the above para. [0006] of the present application. 
       FIG.  8    in the US2006/0159300A1 clearly shows the shape of the trench on the first surface lining corresponds the shape of the first slot on the upper negatively shaped mold halve, and the shape of the trench on the second surface lining corresponds the shape of the second slot on the lower negatively shaped mold halve. Para. [0022] in the US2006/0159300A1 recites “The positions of the first slots 31 and second slots 41 shall be aligned, and the slots are preferably in half-circle shape.” Obviously, the shapes of the trenchs on the first and second surface linings are half-circle shape. As a result, the depths are all the same in the hollow portions of the wave structures disclosed in the US2006/0159300A1, and the depth of the hollow portions at any position on the wave structures are symmetrical. Therefore, the spider with leadwires sandwiched has some problems recited in the above para. [0007] of the present application. 
     Para. [0031] in the US2016/0037264A1 recites “a depth between the crest and trough of the respective corrugation. For instance, the depth of the corrugation 206 is d1.” Para. [0039] in the US2016/0037264A1 recites “As such, the depth d2 of corrugation 306 may be a maximum depth of the corrugation 106 . . . As shown, the depth d2 of the corrugation 306 is greater than the depth d1 of the corrugation 206.” 
     From the above paragraphs in the US2016/0037264A1 and its FIGS. 2 and 3A, d1 and d2 are the depths from the top end of the wave crest of the wave structure to the bottom end of the wave trough but not the depth of the trench which is formed by the wire pressing the wire disposing area inwardly. Also, the US2016/0037264A1 does not provide wires. 
     SUMMARY OF THE INVENTION 
     The main objective of the present invention is to provide a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, which ensure that the wires will not be damaged by the hot pressing of the thermoforming device. As a result, the manufactured wire damper has a high yield and a low manufacturing cost. 
     Another objective of the present invention is to provide a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, wherein the wire damper has uniform hardness, elasticity and toughness, thereby having uniform elastic resilience and fatigue resistance, and being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
     Yet another objective of the present invention is to provide a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, wherein the thermoforming device can uniformly apply force to the wires, such that the wires can maintain their original shape and will not be deformed, thereby improving the output sound quality of the loudspeaker. 
     Still another objective of the present invention is to provide a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, which ensure that the wire damper has a more balanced overall structure, thereby being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
     In order to achieve the above objectives, the present invention provides a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, including: a preparation step, an impregnating step, a drying step, a wire disposing step, a forming step, a cutting step, and an assembling step. 
     In the preparation step, a base material, which is a single-layer fabric structure and is formed by interweaving a plurality of warp yarns and a plurality of weft yarns, is prepared. 
     In the impregnating step, the base material is impregnated in a resin solution. 
     In the drying step, the base material is dried to form a solid resin layer on the base material. 
     In the wire disposing step, at least one wire is disposed on the base material. 
     In the forming step, a wire damper is formed on the base material by thermoforming, in which the wire damper includes a main body and the at least one wire, the main body is a single-layer piece structure formed by interweaving the warp yarns and the weft yarns, the solid resin layer is formed on a surface of the main body, the main body includes a plurality of wave structures, a center hole and at least one wire disposing area, the wave structures are sequentially arranged from an outer edge of the main body to the center hole, each wave structure includes a wave crest, a wave trough, an inner sidewall and an outer sidewall, and the at least one wire disposing area extends radially from the outer edge of the main body through the wave structures to the center hole; wherein the at least one wire disposing area is recessed inwardly to form at least one hollow portion, the at least one wire extends in the at least one hollow portion, and two ends of the at least one wire respectively penetrate an inner edge and the outer edge of the main body; wherein a first elastic adjustment area is formed between the warp yarn closest to outside of a first side of the at least one wire disposing area and the warp yarn at inside of the at least one wire disposing area, a second elastic adjustment area is formed between the warp yarn closest to outside of a second side of the at least one wire disposing area and the warp yarn at the inside of the at least one wire disposing area, widths of the first elastic adjustment area and the second elastic adjustment area are equal to each other, and distances between the remaining warp yarns are less than the width of each of the first elastic adjustment area and the second elastic adjustment area; and wherein each of depths of the at least one hollow portion at the inner sidewalls and the outer sidewalls is less than a depth of the at least one hollow portion at the wave crests, and each of the depths of the at least one hollow portion at the inner sidewalls and the outer sidewalls is less than a depth of the at least one hollow portion at the wave troughs. 
     In the cutting step, the wire damper is cut from the base material. 
     In the assembling step, a voice coil is movably disposed in a loudspeaker body, the center hole of the wire damper is sleeved at the voice coil, and the at least one wire of the wire damper is connected to the voice coil, so as to assemble a loudspeaker. 
     In order to achieve the above objectives, the present invention provides a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, including: a preparation step, an impregnating step, a drying step, a wire disposing step, a forming step, a cutting step, and an assembling step. 
     In the preparation step, a base material, which is a double-layer fabric structure and includes a first fabric and a second fabric, is prepared. The first fabric is formed by interweaving a plurality of first warp yarns and a plurality of first weft yarns, the second fabric is formed by interweaving a plurality of second warp yarns and a plurality of second weft yarns. 
     In the impregnating step, the first fabric and the second fabric are impregnated in a resin solution, respectively. 
     In the drying step, the first fabric and the second fabric are dried to form a first solid resin layer on the first fabric, and to form a second solid resin layer on the second fabric. 
     In the wire disposing step, at least one wire is first disposed on the first fabric, and the second fabric is then disposed on the first fabric, so as to form the base material. 
     In the forming step, a wire damper is formed on the base material by thermoforming, in which the wire damper includes a main body and the at least one wire, the main body is a double-layer piece structure and includes a first piece and a second piece, the first piece is formed by interweaving a plurality of first warp yarns and a plurality of first weft yarns, a first solid resin layer is formed on a surface of the first piece, the first piece includes a plurality of first wave structures, a first center hole and at least one first wire disposing area, the first wave structures are sequentially arranged from an outer edge of the first piece to the first center hole, each first wave structure includes a first wave crest, a first wave trough, a first inner sidewall and a first outer sidewall, the at least one first wire disposing area extends radially from the outer edge of the first piece through the first wave structures to the first center hole, the second piece is formed by interweaving a plurality of second warp yarns and a plurality of second weft yarns, a second solid resin layer is formed on a surface of the second piece, the second piece includes a plurality of second wave structures, a second center hole and at least one second wire disposing area, the second wave structures are sequentially arranged from an outer edge of the second piece to the second center hole, each second wave structure includes a second wave crest, a second wave trough, a second inner sidewall and a second outer sidewall, the at least one second wire disposing area extends radially from the outer edge of the second piece through the second wave structures to the second center hole; wherein the first piece is combined with the second piece, and the at least one first wire disposing area corresponds to the at least one second wire disposing area; wherein the at least one first wire disposing area is recessed inwardly to form at least one first trench, the at least one second wire disposing area is recessed inwardly to form at least one second trench, the at least one first trench and the at least one second trench together form at least one hollow portion, the at least one wire extends in the at least one hollow portion, and two ends of the at least one wire respectively penetrate inner edges and the outer edges of the first piece and the second piece; wherein a first lower elastic adjustment area is formed between the first warp yarn closest to outside of a first side of the at least one first wire disposing area and the first warp yarn at inside of the at least one first wire disposing area, a second lower elastic adjustment area is formed between the first warp yarn closest to outside of a second side of the at least one first wire disposing area and the first warp yarn at the inside of the at least one first wire disposing area, widths of the first lower elastic adjustment area and the second lower elastic adjustment area are equal to each other, and distances between the remaining first warp yarns are less than the width of each of the first lower elastic adjustment area and the second lower elastic adjustment area; wherein a first upper elastic adjustment area is formed between the second warp yarn closest to outside of a first side of the at least one second wire disposing area and the second warp yarn at inside of the at least one second wire disposing area, a second upper elastic adjustment area is formed between the second warp yarn closest to outside of a second side of the at least one second wire disposing area and the second warp yarn at the inside of the at least one second wire disposing area, widths of the first upper elastic adjustment area and the second upper elastic adjustment area are equal to each other, and distances between the remaining second warp yarns are less than the width of each of the first upper elastic adjustment area and the second upper elastic adjustment area; and wherein a depth of the at least one first trench at the first wave crests is less than a depth of the at least one second trench at the second wave crests, a depth of the at least one first trench at the first wave troughs is greater than a depth of the at least one second trench at the second wave troughs, a depth of the at least one first trench at the first inner sidewalls is equal to a depth of the at least one second trench at the second inner sidewalls, a depth of the at least one first trench at the first outer sidewalls is equal to a depth of the at least one second trench at the second outer sidewalls. 
     In the cutting step, the wire damper is cut from the base material. 
     In the assembling step, a voice coil is movably disposed in a loudspeaker body, the first center hole and the second center hole of the wire damper are sleeved at the voice coil, and the at least one wire of the wire damper is connected to the voice coil, so as to assemble a loudspeaker. 
     In order to achieve the above objectives, the present invention provides a loudspeaker having a wire damper with locally adjustable elasticity, including a loudspeaker body, a voice coil and a wire damper. The voice coil is movably disposed in the loudspeaker body. The wire damper includes a main body and the at least one wire. The main body is a single-layer piece structure formed by interweaving a plurality of warp yarns and a plurality of weft yarns, a solid resin layer is formed on a surface of the main body, the main body includes a plurality of wave structures, a center hole and at least one wire disposing area, the wave structures are sequentially arranged from an outer edge of the main body to the center hole, each wave structure includes a wave crest, a wave trough, an inner sidewall and an outer sidewall, the center hole is sleeved at the voice coil, the at least one wire disposing area extends radially from the outer edge of the main body through the wave structures to the center hole; wherein the at least one wire disposing area is recessed inwardly to form at least one hollow portion; wherein a first elastic adjustment area is formed between the warp yarn closest to outside of a first side of the at least one wire disposing area and the warp yarn at inside of the at least one wire disposing area, a second elastic adjustment area is formed between the warp yarn closest to outside of a second side of the at least one wire disposing area and the warp yarn at the inside of the at least one wire disposing area, widths of the first elastic adjustment area and the second elastic adjustment area are equal to each other, and distances between the remaining warp yarns are less than the width of each of the first elastic adjustment area and the second elastic adjustment area; and wherein each of depths of the at least one hollow portion at the inner sidewalls and the outer sidewalls is less than a depth of the at least one hollow portion at the wave crests, and each of the depths of the at least one hollow portion at the inner sidewalls and the outer sidewalls is less than a depth of the at least one hollow portion at the wave troughs. The at least one wire extends in the at least one hollow portion, two ends of the at least one wire respectively penetrate an inner edge and the outer edge of the main body, and one end of the at least one wire is connected to the voice coil. 
     In order to achieve the above objectives, the present invention provides a loudspeaker having a wire damper with locally adjustable elasticity, including a loudspeaker body, a voice coil and a wire damper. The voice coil is movably disposed in the loudspeaker body. The wire damper includes a main body and the at least one wire. The main body is a double-layer piece structure and includes a first piece and a second piece, the first piece is formed by interweaving a plurality of first warp yarns and a plurality of first weft yarns, a first solid resin layer is formed on a surface of the first piece, the first piece includes a plurality of first wave structures, a first center hole and at least one first wire disposing area, the first wave structures are sequentially arranged from an outer edge of the first piece to the first center hole, each first wave structure includes a first wave crest, a first wave trough, a first inner sidewall and a first outer sidewall, the at least one first wire disposing area extends radially from the outer edge of the first piece through the first wave structures to the first center hole, the second piece is formed by interweaving a plurality of second warp yarns and a plurality of second weft yarns, a second solid resin layer is formed on a surface of the second piece, the second piece includes a plurality of second wave structures, a second center hole and at least one second wire disposing area, the second wave structures are sequentially arranged from an outer edge of the second piece to the second center hole, each second wave structure includes a second wave crest, a second wave trough, a second inner sidewall and a second outer sidewall, the at least one second wire disposing area extends radially from the outer edge of the second piece through the second wave structures to the second center hole; wherein the first piece is combined with the second piece, and the at least one first wire disposing area corresponds to the at least one second wire disposing area, the first center hole and the second center hole are sleeved at the voice coil; wherein the at least one first wire disposing area is recessed inwardly to form at least one first trench, the at least one second wire disposing area is recessed inwardly to form at least one second trench, the at least one first trench and the at least one second trench together form at least one hollow portion; wherein a first lower elastic adjustment area is formed between the first warp yarn closest to outside of a first side of the at least one first wire disposing area and the first warp yarn at inside of the at least one first wire disposing area, a second lower elastic adjustment area is formed between the first warp yarn closest to outside of a second side of the at least one first wire disposing area and the first warp yarn at the inside of the at least one first wire disposing area, widths of the first lower elastic adjustment area and the second lower elastic adjustment area are equal to each other, and distances between the remaining first warp yarns are less than the width of each of the first lower elastic adjustment area and the second lower elastic adjustment area; wherein a first upper elastic adjustment area is formed between the second warp yarn closest to outside of a first side of the at least one second wire disposing area and the second warp yarn at inside of the at least one second wire disposing area, a second upper elastic adjustment area is formed between the second warp yarn closest to outside of a second side of the at least one second wire disposing area and the second warp yarn at the inside of the at least one second wire disposing area, widths of the first upper elastic adjustment area and the second upper elastic adjustment area are equal to each other, and distances between the remaining second warp yarns are less than the width of each of the first upper elastic adjustment area and the second upper elastic adjustment area; and wherein a depth of the at least one first trench at the first wave crests is less than a depth of the at least one second trench at the second wave crests, a depth of the at least one first trench at the first wave troughs is greater than a depth of the at least one second trench at the second wave troughs, a depth of the at least one first trench at the first inner sidewalls is equal to a depth of the at least one second trench at the second inner sidewalls, a depth of the at least one first trench at the first outer sidewalls is equal to a depth of the at least one second trench at the second outer sidewalls. the at least one wire extends in the at least one hollow portion, and two ends of the at least one wire respectively penetrate inner edges and the outer edges of the first piece and the second piece, and one end of the at least one wire is connected to the voice coil. 
     The present invention has the advantageous in that the wire disposing areas can be pressed by the wires, thereby recessing inwardly to form the hollow portions. It ensures that the wires will not be damaged by the hot pressing of the thermoforming device. As a result, the manufactured wire damper has a high yield and a low manufacturing cost. 
     Furthermore, the hardness, elasticity and toughness of the wire disposing areas can be adjusted by the elastic adjustment areas. Therefore, the wire disposing areas become softer, and their elasticity and toughness are increased. Thereby, the hardness, elasticity, and toughness of the combination of the wire disposing areas and the wires are equivalent to that of other areas of the main body. Therefore, the wire damper has uniform hardness, elasticity and toughness, thereby having uniform elastic resilience and fatigue resistance, and being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
     Further, since the hollow portions with non-uniform depth allow the wires to extend therein in an non-uniform arrangement manner, the thermoforming device can uniformly apply force to the wires, such that the wires can maintain their original shape and will not be deformed, thereby improving the output sound quality of the loudspeaker. 
     In addition, the present invention can ensure that the wire damper has a more balanced overall structure, thereby being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will be apparent to those skilled in the art by reading the following detailed description of a preferred embodiment thereof, with reference to the attached drawings, in which: 
         FIG.  1    is a block flow diagram of the manufacturing method of the present invention; 
         FIG.  2    is a schematic flow diagram of the first embodiment of the manufacturing method of the present invention; 
         FIG.  3    is a perspective view of the first embodiment of the loudspeaker of the present invention; 
         FIG.  4    is an exploded view of the first embodiment of the loudspeaker of the present invention; 
         FIG.  5    is a cross-sectional view of the first embodiment of the loudspeaker of the present invention; 
         FIG.  6    is a perspective view of the wire damper of the first embodiment of the present invention; 
         FIG.  7    is an exploded view of the wire damper of the first embodiment of the present invention; 
         FIG.  8    is a cross-sectional view along line A-A of  FIG.  6   ; 
         FIG.  9    is a cross-sectional view along line B-B of  FIG.  6   ; 
         FIG.  10    is a cross-sectional view along line C 1 -C 1  and line C 2 -C 2  of  FIG.  6   ; 
         FIGS.  11 A and  11 B  are schematic flow diagrams of the second embodiment of the manufacturing method of the present invention; 
         FIG.  12    is a perspective view of a wire damper of the second embodiment of the present invention; 
         FIG.  13    is an exploded view of the wire damper of the second embodiment of the present invention; 
         FIG.  14    is a cross-sectional view along line D-D of  FIG.  12   ; 
         FIG.  15    is a cross-sectional view along line E-E of  FIG.  12   ; and 
         FIG.  16    is a cross-sectional view along line F 1 -F 1  and line F 2 -F 2  of  FIG.  12   . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Embodiments of the present invention will be described in more detail below with reference to the drawings and the reference numerals, such that those skilled in the art can implement it after studying this specification. 
     Referring to  FIGS.  1  to  10   , the present invention provides a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, including: a preparation step S 1 , an impregnating step S 2 , a drying step S 3 , a wire disposing step S 4 , a forming step S 5 , a cutting step S 6 , and an assembling step S 7 . 
     In the preparation step S 1 , as shown in  FIG.  2   , a base material  10 , which is a single-layer fabric structure and is formed by interweaving a plurality of warp yarns  11  and a plurality of weft yarns  12 , is prepared. 
     In the impregnating step S 2 , as shown in  FIG.  2   , the base material  10  is impregnated in a resin solution  21  in a resin tank  20 , such that the warp yarns  11  and the weft yarns  12  adsorb the resin and are adhered with the resin. 
     In the drying step S 3 , as shown in  FIG.  2   , a drying device  30  includes an upper baking plate  31  and a lower baking plate  32 . By utilizing the temperature of the upper baking plate  31  and the lower baking plate  32 , the moisture and volatile substances in the resin on the base material  10  are removed such that the base material  10  is dried. Meanwhile, the resin penetrates into the base material  10  and is adhered onto the warp yarns  11  and the weft yarns  12 , so as to form a solid resin layer  13 . 
     In the wire disposing step S 4 , as shown in  FIG.  2   , at least one wire  42  is disposed on at least one wire disposing area  413  of the base material  10 . In the first embodiment, four wire disposing area  413  of each of damper forming areas  14  on the base material  10  is provided with four wires  42 . However, the number of the wires  42 , provided in each damper forming area  14  on the base material  10 , are not limited to this. Preferably, as shown in  FIGS.  6  to  9   , the cross section of each wire  42  is circular. In other embodiments, the cross section of each wire  42  may also be a flat section. 
     In the forming step S 5 , as shown in  FIG.  2   , a thermoforming device  50  comprises a forming mold  51  and a heating device (not shown), and the forming mold  51  includes an upper mold  511  and a lower mold  512 . The upper mold  511  has a plurality of protrusions and a plurality of recesses and a central flat portion, and the lower mold  512  has a plurality of protrusions and a plurality of recesses and a central flat portion. When the upper mold  511  and the lower mold  512  fit together, the recesses of the upper mold  511  and the protrusions of the lower mold  512  press the base material  10  to form a plurality of wave crests  4111  while the recesses of the upper mold  511  and the protrusions of the lower mold  512  press the at least one wire  42 , the protrusions of the upper mold  511  and the recesses of the lower mold  512  press the base material  10  to form a plurality of wave troughs  4112  while the protrusions of the upper mold  511  and the recesses of the lower mold  512  press the at least one wire  42 , outer sides of the protrusions of the upper mold  511  and inner sides of the protrusions of the lower mold  512  press the base material  10  to form a plurality of inner sidewalls  4113  while the outer sides of the protrusions of the upper mold  511  and the inner sides of the protrusions of the lower mold  512  press the at least one wire  42 , inner sides of the protrusions of the upper mold  511  and outer sides of the protrusions of the lower mold  512  press the base material  10  to form a plurality of outer sidewalls  4114  while the inner sides of the protrusions of the upper mold  511  and the outer sides of the protrusions of the lower mold  512  press the at least one wire  42 , and the central flat portion of the upper mold  511  and the central flat portion of the lower mold  512  press the base material  10  to form a center hole pre-formed area. Each wave crest  4111 , each wave trough  4112 , each inner sidewall  4113  and each outer sidewall  4114  are formed with a wave structure. Under the pressure of the upper mold  511  and the lower mold  512 , the at least one wire  42  further presses the at least one wire disposing area  413  of the base material  10  to be recessed inwardly to form at least one hollow portion  414 , and the at least one wire  42  stretches the warp yarns  111  on two sides of the at least one wire disposing area  413  toward outer sides, so that the at least one wire  42  enters into the at least one hollow portion  414  immediately. Therefore, the wave structures  411 , the center hole pre-formed area and the at least one wire disposing area  413  are formed with a main body  41 , the at least one wire  42  extends in the at least one hollow portion  414 , and two ends of the at least one wire  42  respectively penetrate the inner and outer edges of the main body  41 , so that the main body  41  and the at least one wire  42  are formed with a wire damper  40 . The wave structures  411  are sequentially arranged from the outer edge of the main body  41  to the center hole pre-formed area. The at least one wire disposing area  413  extends radially from the outer edge of the main body  41  through the wave structures  411  to the center hole pre-formed area. As shown in  FIGS.  8  to  10   , after the at least one wire  42  stretches the warp yarns  111  on two sides of the at least one wire disposing area  413  toward outer sides, a first elastic adjustment area  151  is formed between a warp yarn  111  closest to outside of a first side  4131  of the at least one wire disposing area  413  and a warp yarn  112  at inside of the at least one wire disposing area  413 , a second elastic adjustment area  152  is formed between a warp yarn  111  closest to outside of a second side  4132  of the at least one wire disposing area  413  and the warp yarn  112  at inside of the at least one wire disposing area  413 , and the widths of the first elastic adjustment area  151  and the second elastic adjustment area  152  are equal to each other, and the distances between the remaining warp yarns  11  are less than the width of each of the first elastic adjustment area  151  and the second elastic adjustment area  152 . As shown in  FIGS.  8  to  10   , after the at least one wire  42  stretches the warp yarns  111  on two sides of the at least one wire disposing area  413  toward outer sides, the depth D 31  of the at least one hollow portion  414  at the inner sidewalls  4113  is less than the depth D 1  of the at least one hollow portion  414  at the wave crests  4111 , the depth D 32  of the at least one hollow portion  414  at the outer sidewalls  4114  is less than the depth D 1  of the at least one hollow portion  414  at the wave crests  4111 , the depth D 31  of the at least one hollow portion  414  at the inner sidewalls  4113  is less than the depth D 2  of the at least one hollow portion  414  at the wave troughs  4112 , and the depth D 32  of the at least one hollow portion  414  at the outer sidewalls  4114  is less than the depth D 2  of the at least one hollow portion  414  at the wave troughs  4112 . Preferably, as shown in  FIGS.  8  and  9   , the depth D 1  of the at least one hollow portion  414  at the wave crests  4111  is equal to the depth D 2  of the at least one hollow portion  414  at the wave troughs  4112 ; and as shown in  FIG.  10   , the depth D 31  of the at least one hollow portion  414  at the inner sidewalls  4113  is equal to the depth D 32  of the at least one hollow portion  414  at the outer sidewalls  4114 . In the first embodiment, the wire damper  40  includes four wires  42 , and the main body  41  includes four wire disposing areas  413 . The wires  42  are respectively disposed at the wire disposing areas  413 . The wire disposing areas  413  are recessed inwardly to form four hollow portions  414 . The wires  42  extend in the hollow portions  414  respectively. When the upper mold  511  and the lower mold  512  fit together and press the base material  10  and the at least one wire  42 , the heating device is applied with electricity to increase the temperature of the upper mold  511  and the lower mold  512 , thereby softening the resin on the base material  10 . In addition to destroying the resin structure, the resin also fills up in the gaps, and thus respective parts of the resin are connected with each other to form the final morphology of the solid resin layer  13 . Therefore, the resin cover between the warp yarns  11  and the weft yarns  12 . 
     In the cutting step S 6 , as shown in  FIG.  2   , a cutting device  60  includes an upper cutting tool  61  and a lower cutting tool  62 . The wire damper  40  is cut from the base material  10  by the upper cutting tool  61  and the lower cutting tool  62 , and the center hole pre-formed area is cut out by the upper cutting tool  61  and the lower cutting tool  62 , such that the wire damper  40  is separated from the base material  10 , and the wire damper  40  has a center hole  412 . 
     In the assembling step S 7 , as shown in  FIGS.  2  to  5   , a loudspeaker body  71  includes a base  711 , a magnetic circuit device  712 , an outer frame  713 , a diaphragm  714 , a dust cover  715 , and a surround  716 . The magnetic circuit device  712  is disposed on the base  711 . A voice coil  72  is movably disposed in the magnetic circuit device  712 . The outer frame  713  is disposed at upper side of the magnetic circuit device  712  and supports the outer edge of the main body  41  of the wire damper  40 . The diaphragm  714  is sleeved at the voice coil  72 . The dust cover  715  is disposed on a center hole of the diaphragm  714 . The surround  716  is disposed between the top edge of the diaphragm  714  and the outer frame  713 . The center hole  412  of the wire damper  40  is sleeved at the voice coil  72 , and the wires  42  of the wire damper  40  are connected to the voice coil  72 . Thereby, the loudspeaker body  71 , the voice coil  72  and the wire damper  40  are assembled together to form a loudspeaker  70 . 
     As shown in  FIGS.  3  to  10   , the present invention provides a loudspeaker  70  having a wire damper with locally adjustable elasticity, including a loudspeaker body  71 , a voice coil  72 , and a wire damper  40 . The structure of the loudspeaker body  71 , the voice coil  72 , and the wire damper  40  and their connection relationship are as described above. 
     According to this, since the wires  42  are not fixedly adhered onto the surface of the yarns of the base material  10  when being disposed on the base material  10 , when the wire damper  40  is formed on the base material  10  by thermoforming of 
     the thermoforming device  50 , the wire disposing areas  413  can be pressed by the wires  42 , thereby recessing inwardly to form the hollow portions  414 . It ensures that the wires  42  will not be damaged by the hot pressing of the thermoforming device  50 . As a result, the manufactured wire damper  40  has a high yield and a low manufacturing cost. 
     Furthermore, by the first elastic adjustment areas  151  and the second elastic adjustment areas  152 , the hardness, elasticity and toughness of the wire disposing areas  413  can be adjusted. Therefore, the wire disposing areas  413  become softer, and their elasticity and toughness are increased. Thereby, the hardness, elasticity, and toughness of the combination of the wire disposing areas  413  and the wires  42  are equivalent to that of other areas of the main body  41 . Therefore, the wire damper  40  has uniform hardness, elasticity and toughness, thereby having uniform elastic resilience and fatigue resistance, and being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
     In addition, the thermoforming device  50  must uniformly apply force to each wire  42  to ensure that each wire  42  will not be deformed due to being non-uniformly forced. However, the thermoforming device  50  requires larger pressing force to be able to form the wave crests  4111  and the wave troughs  4112  by thermoforming; and the thermoforming device  50  requires less pressing force to be able to form the inner sidewalls  4113  and the outer sidewalls  4114  by thermoforming. Therefore, after the at least one wire  42  stretches the warp yarns  111  on two sides of the at least one wire disposing area  413  toward outer sides, the depth D 31  of the hollow portions  414  at the inner sidewalls  4113  is less than the depth D 1  of the hollow portions  414  at the wave crests  4111 , the depth D 32  of the hollow portions  414  at the outer sidewalls  4114  is less than the depth D 1  of the hollow portions  414  at the wave crests  4111 , the depth D 31  of the hollow portions  414  at the inner sidewalls  4113  is less than the depth D 2  of the hollow portions  414  at the wave troughs  4112 , and the depth D 32  of the hollow portions  414  at the outer sidewalls  4114  is less than the depth D 2  of the hollow portions  414  at the wave troughs  4112 . In other words, the depths of the hollow portions  414  are non-uniform. Since the hollow portions  414  with non-uniform depth allow the wires  42  to extend therein in an non-uniform arrangement manner, the thermoforming device  50  can uniformly apply force to each wire  42 , such that the wires  42  can maintain their original shape and will not be deformed, thereby improving the output sound quality of the loudspeaker. Under the condition that the wires  42  maintain their original shapes, relative large parts of volumes of the wires  42  are positioned in the hollow portions  414  at the wave crests  4111  and the wave troughs  4112 , while relative small parts of volumes of the wires  42  are positioned in the hollow portions  414  at the inner sidewalls  4113  and the outer sidewalls  4114 . Also, relative small parts of volume of the wires  42  are exposed on the surface of the main body  41  at the wave crests  4111  and the wave troughs  4112 , while relative large parts of volumes of the wires  42  are exposed on the surface of the main body  41  at the inner sidewalls  4113  and the outer sidewalls  4114 . 
     In addition, the depth D 1  of the hollow portions  414  at the wave crests  4111  is equal to the depth D 2  of the hollow portions  414  at the wave troughs  4112 , such that the volumes of the wires  42  positioned in the hollow portions  414  at the wave crests  4111  and the wave troughs  4112  are equal to each other, and the volumes of the wires  42  exposed on the surface of the main body  41  at the wave crests  4111  and the wave troughs  4112  are equal to each other. Furthermore, since the depth D 31  of the hollow portions  414  at the inner sidewalls  4113  is equal to the depth D 32  of the hollow portions  414  at the outer sidewalls  4114 , the volumes of the wires  42  positioned in the hollow portions  414  at the inner sidewalls  4113  and the outer sidewalls  4114  are equal to each other, and the volumes of the wires  42  exposed on the surface of the main body  41  at the inner sidewalls  4113  and the outer sidewalls  4114  are equal to each other. Therefore, the wire damper  40  has a more balanced overall structure with uniform hardness, elasticity and toughness, thereby having uniform elastic resilience and fatigue resistance, and being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
     Referring to  FIG.  1    and  FIGS.  11 A to  16   , the present invention provides a method for manufacturing a loudspeaker having a wire damper with locally adjustable elasticity, wherein the manufacturing method of the second embodiment is different from that of the first embodiment as following. 
     In a preparation step S 1 , as shown in  FIG.  11 A , a base material  10 A is a double-layer fabric structure and includes a first fabric  101  and a second fabric  102 . The first fabric  101  is formed by interweaving a plurality of first warp yarns  11 A and a plurality of first weft yarns  12 A. The second fabric  102  is formed by interweaving a plurality of second warp yarns  11 B and a plurality of second weft yarns  12 B. 
     In an impregnating step S 2 , as shown in  FIG.  11 A , the first fabric  101  and the second fabric  102  are impregnated in a resin solution  21 , respectively. 
     In a drying step S 3 , as shown in  FIG.  11 A , the first fabric  101  and the second fabric  102  are dried, so as to form a first solid resin layer  13 A on the first fabric  101 , and to form a second solid resin layer  13 B on the second fabric  102 . 
     In a wire disposing step S 4 , as shown in  FIG.  11 A , at least one wire  42  is first disposed on at least one first wire disposing area  413 A of the first fabric  101 , the second fabric  102  is then disposed on the first fabric  101 , at least one wire  42  is disposed on at least one second wire disposing area  413 B of the second fabric  102 , and the at least one first wire disposing area  413 A corresponds to the at least one second wire disposing area  413 B. 
     In a forming step S 5 , as shown in  FIG.  11 B , When the upper mold  511  and the lower mold  512  fit together, the recesses of the upper mold  511  and the protrusions of the lower mold  512  press the first fabric  101  to form a plurality of first wave crests  4111 A, and the recesses of the upper mold  511  and the protrusions of the lower mold  512  press second fabric  102  to form a plurality of second wave crests  4111 B, while the recesses of the upper mold  511  and the protrusions of the lower mold  512  press the at least one wire  42 ; the protrusions of the upper mold  511  and the recesses of the lower mold  512  press the first fabric  101  to form a plurality of first wave troughs  4112 A, and the protrusions of the upper mold  511  and the recesses of the lower mold  512  press the second fabric  102  to form a plurality of second wave troughs  4112 B, while the protrusions of the upper mold  511  and the recesses of the lower mold  512  press the at least one wire  42 ; outer sides of the protrusions of the upper mold  511  and inner sides of the protrusions of the lower mold  512  press the first fabric  101  to form a plurality of first inner sidewalls  4113 A, and the outer sides of the protrusions of the upper mold  511  and the inner sides of the protrusions of the lower mold  512  press the second fabric  102  to form a plurality of second inner sidewalls  4113 B, while the outer sides of the protrusions of the upper mold  511  and the inner sides of the protrusions of the lower mold  512  press the at least one wire  42 ; inner sides of the protrusions of the upper mold  511  and outer sides of the protrusions of the lower mold  512  press the first fabric  101  to form a plurality of first outer sidewalls  4114 A, and the inner sides of the protrusions of the upper mold  511  and the outer sides of the protrusions of the lower mold  512  press the second fabric  102  to form a plurality of second outer sidewalls  4114 B, while the inner sides of the protrusions of the upper mold  511  and the outer sides of the protrusions of the lower mold  512  press the at least one wire  42 ; and the central flat portion of the upper mold  511  and the central flat portion of the lower mold  512  press the first fabric  101  to form a first center hole pre-formed area, and the central flat portion of the upper mold  511  and the central flat portion of the lower mold  512  press the second fabric  102  to form a second center hole pre-formed area. Each first wave crest  4111 A, each first wave trough  4112 A, each first inner sidewall  4113 A and each first outer sidewall  4114 A are formed with a first wave structure  411 A, and each second wave crest  4111 B, each second wave trough  4112 B, each second inner sidewall  4113 B and each second outer sidewall  4114 B are formed with a second wave structure  411 B. Under the pressure of the upper mold  511  and the lower mold  512 , the at least one wire  42  further presses the at least one first wire disposing area  413 A of the first fabric  101  to be recessed inwardly to form at least one first trench  4141 , the at least one wire  42  further presses the at least one second wire disposing area  413 B to be recessed inwardly to form at least one second trench  4142 , the at least one first trench  4141  and the at least one second trench  4142  together form at least one hollow portion  414 A, the at least one wire  42  stretches the first warp yarns  111 A on two sides of the at least one first wire disposing area  413 A toward outer sides, and the at least one wire  42  stretches the second warp yarns  111 B on two sides of the at least one second wire disposing area  413 B toward outer sides, so that the at least one wire  42  enters into the at least one hollow portion  414 A immediately. Therefore, the first wave structures  411 A, the first center hole pre-formed area and the at least one first wire disposing area  413 A are formed with a first piece  415 , the second wave structures  411 B, the second center hole pre-formed area and the at least one second wire disposing area  413 B are formed with a second piece  416 , the first piece  415  is combined with the second piece  416  together and formed with a main body  41 A, the at least one wire  42  extends in the at least one hollow portion  414 A, and two ends of the at least one wire  42  respectively penetrate the inner and outer edges of the first piece  415  and the second piece  416 , so that the main body  41 A and the at least one wire  42  are formed with a wire damper  40 A. The first wave structures  411 A are sequentially arranged from the outer edge of the first piece  415  to the first center hole pre-formed area. The at least one first wire disposing area  413 A extends radially from the outer edge of the first piece  415  through the first wave structures  411 A to the first center hole pre-formed area. The second wave structures  411 B are sequentially arranged from the outer edge of the second piece  416  to the second center hole pre-formed area. The at least one second wire disposing area  413 B extends radially from the outer edge of the second piece  416  through the second wave structures  411 B to the second center hole pre-formed area. As shown in  FIGS.  14  to  16   , after the at least one wire  42  stretches the first warp yarns  111 A on two sides of the at least one first wire disposing area  413 A toward outer sides, a first lower elastic adjustment area  161  is formed between a first warp yarn  111 A closest to outside of a first side  4131 A of the at least one first wire disposing area  413 A and a first warp yarn  112 A at inside of the at least one first wire disposing area  413 A, a second lower elastic adjustment area  162  is formed between a first warp yarn  111 A closest to outside of a second side  4132 A of the at least one first wire disposing area  413 A and the first warp yarn  112 A at inside of the at least one first wire disposing area  413 A, the widths of the first lower elastic adjustment area  161  and the second lower elastic adjustment area  162  are equal to each other, and the distances between the remaining first warp yarns  11 A are less than the width of each of the first lower elastic adjustment area  161  and the second lower elastic adjustment area  162 . As shown in  FIGS.  14  to  16   , after the at least one wire  42  stretches the second warp yarns  111 B on two sides of the at least one second wire disposing area  413 B toward outer sides, a first upper elastic adjustment area  171  is formed between a second warp yarn  111 B closest to outside of a first side  4131 B of the at least one second wire disposing area  413 B and a second warp yarn  112 B at inside of the at least one second wire disposing area  413 B, a second upper elastic adjustment area  172  is formed between a second warp yarn  111 B closest to outside of a second side  4132 B of the at least one second wire disposing area  413 B and the second warp yarn  112 B at inside of the at least one second wire disposing area  413 B, the widths of the first upper elastic adjustment area  171  and the second upper elastic adjustment area  172  are equal to each other, and the distances between the remaining second warp yarns  11 B are less than the width of each of the first upper elastic adjustment area  171  and the second upper elastic adjustment area  172 . As shown in  FIGS.  14  to  16   , after the at least one wire  42  stretches the first warp yarns  111 A on two sides of the at least one first wire disposing area  413 A toward outer sides, and after the at least one wire  42  stretches the second warp yarns  111 B on two sides of the at least one second wire disposing area  413 B toward outer sides, the depth D 4  of the at least one first trench  4141  at the first wave crests  4111 A is less than the depth D 5  of the at least one second trench  4142  at the second wave crests  4111 B, the depth D 6  of the at least one first trench  4141  at the first wave troughs  4112 A is greater than the depth D 7  of the at least one second trench  4142  at the second wave troughs  4112 B, the depth D 81  of the at least one first trench  4141  at the first inner sidewalls  4113 A is equal to the depth D 91  of the at least one second trench  4142  at the second inner sidewalls  4113 B, and the depth D 82  of the at least one first trench  4141  at the first outer sidewalls  4114 A is equal to the depth D 92  of the at least one second trench  4142  at the second outer sidewalls  4114 B. Preferably, as shown in  FIGS.  14  and  15   , the depth D 4  of the at least one first trench  4141  at the first wave crests  4111 A is equal to the depth D 7  of the at least one second trench  4142  at the second wave troughs  4112 B; and the depth D 5  of the at least one second trench  4142  at the second wave crests  4111 B is equal to the depth D 6  of the at least one first trench  4141  at the first wave troughs  4112 A. Also, as shown in  FIG.  16   , the depth D 81  of the at least one first trench  4141  at the first inner sidewalls  4113 A is equal to the depth D 82  of the at least one first trench  4141  at the first outer sidewalls  4114 A; and the depth D 91  of the at least one second trench  4142  at the second inner sidewalls  4113 B is equal to the depth D 92  of the at least one second trench  4142  at the second outer sidewalls  4114 B. In the second embodiment, the wire damper  40 A includes four wires  42 . The first piece  415  includes four first wire disposing areas  413 A, and the second piece  416  includes four second wire disposing areas  413 B. The wires  42  are respectively disposed at the first wire disposing areas  413 A and the second wire disposing areas  413 B. The first wire disposing areas  413 A are recessed inwardly to form four first trenches  4141 , the second wire disposing areas  413 B are recessed inwardly to form four second trenches  4142 , and the first trenches  4141  and the second trenches  4142  together form four hollow portions  414 A. The wires  42  extend in the hollow portions  414 A respectively. When the upper mold  511  and the lower mold  512  fit together and press the first fabric  101 , the second fabric  102  and the at least one wire  42 , the heating device is applied with electricity to increase the temperature of the upper mold  511  and the lower mold  512 , thereby softening the resin on the first fabric  101  and the second fabric  102 . In addition to destroying the resin structure, the resin also fills up in the gaps, and thus respective parts of the resin are connected with each other to form the final morphology of the solid resin layer  13 . Therefore, the resin cover between the warp yarns  11  and the weft yarns  12 . 
     In the cutting step S 6 , as shown in  FIG.  11 B , the wire damper  40 A is cut from the base material  10 A and both of the first center hole pre-formed area and the second center hole pre-formed area are cut out by the upper cutting tool  61  and the lower cutting tool  62 , such that the wire damper  40 A is separated from the base material  10 A, and the wire damper  40 A has a first center hole  412 A and a second center hole  412 B. 
     In an assembling step S 7 , as shown in  FIG.  11 B , the first center hole  412 A and the second center hole  412 B are both sleeved at a voice coil. 
     As shown in  FIGS.  12  to  16   , the present invention provides a loudspeaker  70 A having a wire damper with locally adjustable elasticity, wherein the differences between the structures of the loudspeaker  70 A of the second embodiment and the loudspeaker  70  of the first embodiment are as described above. 
     According to this, since the wires  42  are not fixedly adhered onto the surface of the yarns of the first fabric  101  when being disposed on the first fabric  101 , when the wire damper  40  is formed on the base material  10  by thermoforming of the thermoforming device  50 , the first wire disposing areas  413 A and the second wire disposing areas  413 B can be pressed by the wires  42 , thereby recessing inwardly to form the first trenches  4141  and the second trenches  4142 , and the first trenches  4141  and the second trenches  4142  can further forms the hollow portions  414 A. It ensures that the wires  42  will not be damaged by the hot pressing of the thermoforming device  50 . As a result, the manufactured wire damper  40  has a high yield and a low manufacturing cost. 
     Furthermore, by the first lower elastic adjustment areas  161  and the second lower elastic adjustment areas  162 , the hardness, elasticity and toughness of the first wire disposing areas  413 A can be adjusted; and by the first upper elastic adjustment areas  171  and the second upper elastic adjustment areas  172 , the hardness, elasticity and toughness of the second wire disposing areas  413 B can be adjusted. Therefore, the first wire disposing areas  413 A and the second wire disposing areas  413 B become softer, and their elasticity and toughness are increased. Thereby, the hardness, elasticity, and toughness of the combination of the first wire disposing areas  413 A, the second wire disposing areas  413 B and the wires  42  are equivalent to that of other areas of the main body  41 A. Therefore, the wire damper  40 A has uniform hardness, elasticity and toughness, thereby having uniform elastic resilience and fatigue resistance, and being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
     In addition, the thermoforming device  50  must uniformly apply force to each wire  42  to ensure that each wire  42  will not be deformed due to being non-uniformly forced. However, the thermoforming device  50  requires larger pressing force to be able to form the first wave crests  4111 A, the first wave troughs  4112 A, the second wave crests  4111 B and the second wave troughs  4112 B by thermoforming. Also, the thermoforming device  50  requires less pressing force to be able to form the first inner sidewalls  4113 A, the first outer sidewalls  4114 A, the second inner sidewalls  4113 B and the second outer sidewalls  4114 B by thermoforming. Therefore, after the at least one wire  42  stretches the first warp yarns  111 A on two sides of the at least one first wire disposing area  413 A toward outer sides, and after the at least one wire  42  stretches the second warp yarns  111 B on two sides of the at least one second wire disposing area  413 B toward outer sides, the depth D 4  of the first trenches  4141  at the first wave crests  4111 A is less than the depth D 5  of the second trenches  4142  at the second wave crests  4111 B. The depth D 6  of the first trenches  4141  at the first wave troughs  4112 A is greater than the depth D 7  of the second trenches  4142  at the second wave troughs  4112 B. The depth D 81  of the first trenches  4141  at the first inner sidewalls  4113 A is equal to the depth D 91  of the second trenches  4142  at the second inner sidewalls  4113 B. The depth D 82  of the first trenches  4141  at the first outer sidewalls  4114 A is equal to the depth D 92  of the second trenches  4142  at the second outer sidewalls  4114 B. In other words, the depths of the hollow portions  414 A are non-uniform. Since the hollow portions  414 A with non-uniform depth allow the wires  42  to extend therein in an non-uniform arrangement manner, the thermoforming device  50  can uniformly apply force to each wire  42 , such that the wires  42  can maintain their original shape and will not be deformed, thereby improving the output sound quality of the loudspeaker. Under the condition that the wires  42  maintain their original shapes, the diameter of the hollow portions  414 A in the space between the first wave crests  4111 A and the second wave crests  4111 B is equal to the diameter of the wires  42 ; the diameter of the hollow portions  414 A in the space between the first wave troughs  4112 A and the second wave troughs  4112 B is equal to the diameter of the wires  42 ; the diameter of the hollow portions  414 A in the space between the first inner sidewalls  4113 A and the second inner sidewalls  4113 B is equal to the diameter of the wires  42 ; and the diameter of the hollow portions  414 A in the space between the first outer sidewalls  4114 A and the second outer sidewalls  4114 B is equal to the diameter of the wires  42 . 
     In addition, the depth D 4  of the first trenches  4141  at the first wave crests  4111 A is equal to the depth D 7  of the second trenches  4142  at the second wave troughs  4112 B, and the depth D 5  of the second trenches  4142  at the second wave crests  4111 B is equal to the depth D 6  of the first trenches  4141  at the first wave troughs  4112 A, such that the diameter of the hollow portions  414 A in the space between the first wave crests  4111 A and the second wave crests  4111 B is equal to the diameter of the hollow portions  414 A in the space between the first wave troughs  4112 A and the second wave troughs  4112 B. Furthermore, the depth D 81  of the first trenches  4141  at the first inner sidewalls  4113 A is equal to the depth D 82  of the first trenches  4141  at the first outer sidewalls  4114 A, and the depth D 91  of the second trenches  4142  at the second inner sidewalls  4113 B is equal to the depth D 92  of the second trenches  4142  at the second outer sidewalls  4114 B, such that the diameter of the hollow portions  414 A in the space between the first inner sidewalls  4113 A and the second inner sidewalls  4113 B is equal to the diameter of the hollow portions  414 A in the space between the first outer sidewalls  4114 A and the second outer sidewalls  4114 B. Therefore, the wire damper  40 A has a more balanced overall structure with uniform hardness, elasticity and toughness, thereby having uniform elastic resilience and fatigue resistance, and being not easy to be deformed and brittle, which improves the output sound quality of the loudspeaker. 
     It is noted that since the wires  42  are sandwiched by the first fabric  101  and the second fabric  102 , they will not contact with the thermoforming device  50 , which ensures that the wires  42  will not be damaged by the hot pressing of the thermoforming device  50 . As a result, the manufactured wire damper  40 A has a high yield and a low manufacturing cost. 
     The mentioned above are only preferred embodiments for explaining the present invention but intend to limit the present invention in any forms, so that any modifications or verification relating to the present invention made in the same spirit of the invention should still be included in the scope of the invention as intended to be claimed.