Patent Publication Number: US-10327074-B2

Title: Vibrating film and vibrating film assembling process

Description:
TECHNICAL FIELD 
     The present invention relates to the technical field of electro-acoustic products, and more particularly, to a vibrating diaphragm and an assembling process for the vibrating diaphragm. 
     BACKGROUND 
     A vibrating diaphragm is one of the main components of electro-acoustic products. A typical vibrating diaphragm comprises a vibrating diaphragm body, a fixing steel ring is arranged at the periphery of the vibrating diaphragm body, and a Dome reinforcing part is provided at the central plane part of the vibrating diaphragm body. In the existing vibrating diaphragm structure, the vibrating diaphragm body and the Dome reinforcing part, as well as the vibrating diaphragm body and the fixing steel ring are mostly bonded by adhesive. This adhesive technology has lower adhesive force, thus, after the vibrating diaphragm is arranged into electro-acoustic products, the vibrating diaphragm tends to loose in the subsequent application of electro-acoustic products, which has been unable to meet the current requirements on high-power electro-acoustic products. In addition, during the production process of the vibrating diaphragm using the existing technology, the vibrating diaphragm, the fixing ring and the Dome reinforcing part are required to be bonded respectively, and thus the production efficiency is lower. 
     SUMMARY 
     The first technical problem sought to be solved by the present invention is to provide a vibrating diaphragm having strong adhesion strength between components and good high-frequency characteristic. 
     The second technical problem sought to be solved by the present invention is to provide an assembling process for the vibrating diaphragm having strong adhesion strength between components and good high-frequency characteristic. 
     In order to solve the first technical problem mentioned above, a technical solution of the present invention is that: 
     a vibrating diaphragm, comprising a vibrating diaphragm body, wherein the vibrating diaphragm body comprises a plane part at a central portion and a fixing part at a peripheral portion, a Dome reinforcing part is provided on the plane part, a first thermosetting adhesive layer is provided between the plane part and the Dome reinforcing part, and the plane part and the Dome reinforcing part are adhered together by thermally curing the first thermosetting adhesive layer. 
     Preferably, a fixing ring is provided on the fixing part, a second thermosetting adhesive layer is provided between the fixing part and the fixing ring, and the fixing part and the fixing ring are adhered together by thermally curing the second thermosetting adhesive layer. 
     Preferably, each of the first thermosetting adhesive layer and the second thermosetting adhesive layer is a thermosetting adhesive pad. 
     Preferably, the thermosetting adhesive pad is a thermosetting adhesive pad made of epoxy resin material or polyimide resin material. 
     Preferably, the fixing ring is a fixing ring made of metal material. 
     Preferably, the fixing ring is a fixing ring made of steel or copper material. 
     In order to solve the second technical problem mentioned above, a technical solution of the present invention is that: 
     an assembling process for the above-mentioned vibrating diaphragm, comprising the following steps: 
     step (a): preparing a molding base for the vibrating diaphragm, and providing the Dome reinforcing part on the molding base for the vibrating diaphragm; 
     step (b): providing the first thermosetting adhesive layer on the Dome reinforcing part; 
     step (c): providing a material belt of the vibrating diaphragm above the Dome reinforcing part; 
     step (d): adhering the Dome reinforcing part with the material belt of the vibrating diaphragm by thermally curing the first thermosetting adhesive layer under high temperature and high pressure; and 
     step (e): blanking the profile of the vibrating diaphragm using a blanking die cutter to form the vibrating diaphragm, wherein the material belt of the vibrating diaphragm forms the vibrating diaphragm body. 
     Preferably, in the step (a), further comprises step (a 1 ): providing the fixing ring on the molding base for the vibrating diaphragm; 
     in the step (b), further comprises step (b 1 ): providing the second thermosetting adhesive layer on the fixing ring; and 
     in the step (d), the Dome reinforcing part and the material belt of the vibrating diaphragm are adhered together by thermally curing the first thermosetting adhesive layer, and the fixing ring and the material belt of the vibrating diaphragm are adhered together by thermally curing the second thermosetting adhesive layer under high temperature and high pressure, such that the fixing ring, the material belt of the vibrating diaphragm and the Dome reinforcing part are adhered as an integral structure to form the vibrating diaphragm. 
     Preferably, each of the first thermosetting adhesive layer and the second thermosetting adhesive layer employs a thermosetting adhesive pad. 
     Preferably, the fixing ring is a fixing ring made of metal material. 
     According to the technical solutions of the present invention, the advantageous effects of the present invention are described below. 
     The present invention provides a vibrating diaphragm and an assembling process for the vibrating diaphragm. The vibrating diaphragm body and the Dome reinforcing part are adhered together by thermally curing the first thermosetting adhesive layer utilizing high temperature and high pressure generated when molding the vibrating diaphragm. By adhering through the thermosetting adhesive layer, the adhesive strength between the vibrating diaphragm body and the Dome reinforcing part is greatly improved, and the reliability of the product is improved. At the same time, the hardness of the adhesive pad after adhering may be adjusted by choosing different thermosetting adhesive materials or process parameters as required, so as to achieve secondary hardening of the Dome reinforcing part and improve the rigidity of the Dome reinforcing part, thereby improving the rigidity of the finished vibrating diaphragm. When the vibrating diaphragm with such a configuration is applied to an electroacoustic product such as a speaker, it is possible to improve the rigidity of the vibrating diaphragm and reduce the transverse vibration of the vibrating diaphragm, thereby reducing the internal loss in the vibrating diaphragm, and improving the ability of radiating sound wave, the high-frequency characteristic of the product, the sound quality, and the acoustic performance of the product. 
     In the present invention, a fixing ring is provided on the fixing part, a second thermosetting adhesive layer is provided between the fixing part and the fixing ring, and the fixing part and the fixing ring are adhered together by thermally curing the second thermosetting adhesive layer. During the production process of the vibrating diaphragm with such a configuration, the vibrating diaphragm body and the Dome reinforcing part as well as the vibrating diaphragm body and the fixing ring are adhered together in the molding process of the vibrating diaphragm, by adhering the vibrating diaphragm body and the Dome reinforcing part together by thermally curing the first thermosetting adhesive layer, and adhering the vibrating diaphragm body and the fixing ring together by thermally curing the second thermosetting adhesive layer utilizing high temperature and high pressure generated when molding the vibrating diaphragm without individual process, thereby improving the production efficiency of the products. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       Hereinafter, the present invention will be further described with reference to the accompanying drawings and embodiments. 
         FIG. 1  is a schematic structural view of a vibrating diaphragm in the present invention. 
         FIG. 2  is an exploded view of  FIG. 1 . 
         FIG. 3  is a front schematic structural view of  FIG. 1 . 
         FIG. 4  is an enlarged schematic view of part A of  FIG. 1 . 
     
    
    
     In the drawings:  1 , vibrating diaphragm body;  11 , plane part;  12 , fixing part;  2 , first thermosetting adhesive pad;  3 , fixing ring;  4 , second thermosetting pad;  5 , dome reinforcing part. 
     DETAILED DESCRIPTION OF EMBODIMENTS 
     The present invention is further described in detail with regard to accompanying drawings and embodiments in order to make the objectives, technical solutions and advantages of the present invention more clear. It will be understood that the described particular embodiments are only used for explaining the present invention, but not for limiting the present invention. 
     Referring to  FIGS. 1, 2, 3 and 4 , a vibrating diaphragm comprises a vibrating diaphragm body  1 . The vibrating diaphragm body  1  comprises a central plane part  11  and a peripheral fixing part  12 . A Dome reinforcing part  5  for reinforcing rigidity is provided on the plane part  11 . A fixing ring  3  for reinforcing strength is provided on the fixing part  12 . A first thermosetting adhesive pad  2  is provided between the plane part  11  of the vibrating diaphragm body  1  and the Dome reinforcing part  5 . The plane part  11  of the vibrating diaphragm body and the Dome reinforcing part  5  are adhered together by thermally curing the first thermosetting adhesive pad  2 . A second thermosetting adhesive pad  4  is provided between the vibrating diaphragm body  1  and the fixing ring  3 , and the fixing part  12  of the vibrating diaphragm body  1  and the fixing ring  3  are adhered together by thermally curing the second thermosetting adhesive pad  4 . 
     Wherein, the first thermosetting adhesive pad  2  and the second thermosetting adhesive pad  4  may be replaced by sprinkling a layer of liquid thermosetting adhesive. 
     In the present embodiment, the thermosetting adhesive pad is made of epoxy resin material, and in the practical application, polyimide resin material or other material may be used as well. 
     In the present embodiment, the fixing ring  3  is a fixing ring made of steel material. However, a fixing ring made of other metal material may be used as well. 
     An assembling process for the above-mentioned vibrating diaphragm comprises the following steps: 
     step (a): preparing a molding base for the vibrating diaphragm, and providing the fixing ring  3  and the Dome reinforcing part  5  on the molding base for the vibrating diaphragm; 
     step (b): providing the first thermosetting adhesive pad  2  on the fixing ring  3 , and providing the second thermosetting adhesive pad  4  on the Dome reinforcing part  5 ; 
     step (c): providing a material belt of the vibrating diaphragm above the fixing ring  3  and the Dome reinforcing part  5 ; 
     step (d): adhering the fixing ring  3  and the material belt of the vibrating diaphragm together by thermally curing the first thermosetting adhesive pad  2 , and adhering the Dome reinforcing part  5  and the material belt of the vibrating diaphragm together by thermally curing the second thermosetting adhesive pad  4  utilizing high temperature and high pressure, such that the fixing ring  3 , the material belt of the vibrating diaphragm and the Dome reinforcing part  5  are adhered as an integral structure; and 
     step (e): blanking the profile of the vibrating diaphragm using a blanking die cutter to form the vibrating diaphragm, wherein the vibrating diaphragm body  1  is formed by the material belt of the vibrating diaphragm. 
     Wherein, the fixing ring  3  is a fixing ring made of steel material. 
     In the vibrating diaphragm and the assembling process for the vibrating diaphragm according to the present invention, during the production process, the vibrating diaphragm body  1  and the Dome reinforcing part  5  as well as the vibrating diaphragm body  1  and the fixing ring  3  are adhered together in the molding process of the vibrating diaphragm, by adhering the vibrating diaphragm body  1  and the Dome reinforcing part  5  together by thermally curing the first thermosetting adhesive pad  2 , and adhering the vibrating diaphragm body  1  and the fixing ring  3  together by thermally curing the second thermosetting adhesive pad  4  utilizing high temperature and high pressure generated when molding the vibrating diaphragm without respectively adhering the vibrating diaphragm body  1  with the Dome reinforcing part  5  and the fixing ring  3 , thereby improving the production efficiency of the products. 
     In addition, the vibrating diaphragm body  1  and the Dome reinforcing part  5 , as well as the vibrating diaphragm body  1  and the fixing ring  3  are adhered together by thermally curing thermosetting adhesive pads, thereby greatly improving the adhesive strength between the vibrating diaphragm body  1  and the Dome reinforcing part  5 , as well as the vibrating diaphragm body  1  and the fixing ring  3 , and improving the reliability of the products. At the same time, the hardness of the adhered adhesive pads may be adjusted by choosing different thermosetting adhesive materials or process parameters as required, so as to achieve secondary hardening of the Dome reinforcing part  5  and improve the rigidity of the Dome reinforcing part  5 , thereby improving the rigidity of the vibrating diaphragm. When the vibrating diaphragm with such a configuration is applied to an electroacoustic product such as a speaker, it is possible to improve the rigidity of the vibrating diaphragm and reduce the transverse vibration of the vibrating diaphragm, thereby reducing the internal loss in the vibrating diaphragm, and improving the ability of radiating sound wave, the high-frequency characteristic of the product, the sound quality, and the acoustic performance of the product. 
     The foregoing are examples of preferred embodiments of the present invention in which those not described in detail are well known to those skilled in the art. The scope of protection of the present invention is subject to the scope of the claims, and any equivalent transformation based on the technical enlightenment of the present invention also falls into the scope of the present invention.