High-temperature resistant composite vibrating diaphragm for electro-acoustic transducer
An electro-acoustic transducer and high-temperature-resistant technology, which is applied in the field of electrical components, can solve problems such as product failure, temperature characteristic conflict, and deterioration of electro-acoustic transducer characteristics, and achieve the effect of increasing application fields and improving production efficiency
Pending Publication Date: 2018-10-23
SUZHOU E AUDIO ELECTRONICS
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Problems solved by technology
When the ambient temperature exceeds 75°C, the thermoplastic polyurethane film will decompose and fail, and the characteristics of the electroacoustic transducer will deteriorate, resulting in product failure
Therefore, the temperature characteristics of the diaphragm of the electroacoustic transducer in the prior art have limited the application and production of the electroacoustic transducer in many fields; for example, in the surface high-speed mounting process (SMT process) commonly used in electronic product production, The temperature of the reflow furnace is 260°C (typical). This temperature conflicts with the temperature characteristics of the diaphragm of the electroacoustic transducer, which makes it impossible for the electroacoustic transducer to be assembled at high speed using the SMT process, which greatly limits the electroacoustic transducer. Capability of energy
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Embodiment 1
[0014] Such as figure 1 and figure 2 As shown, the high temperature resistant composite diaphragm of this embodiment includes a base layer 1, a coupling layer 2 and a thin film layer 3;
[0015] The base layer 1 is made of 304 stainless steel, which is made by stamping process or metal etching. figure 2 the rectangle shown in;
[0016] The material of the coupling layer 2 includes a silicon-based material and a high-temperature-resistant adhesive, and the coupling layer 2 is formed directly on the substrate. on the base layer 1, and then use ion implantation to form a dense coupling layer 2 on the surface of the base layer 1;
[0017] The film layer 3 is a polymer film layer, and the material of the polymer film layer includes silicon-based materials and polyurethane.
[0018] The specific production steps of the composite diaphragm are:
[0019] (1) Put the above-mentioned base layer 1 attached with the coupling layer 2 into the thermoforming fixture;
[0020] (2) Pla...
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The invention discloses a high-temperature resistant composite vibrating diaphragm for an electro-acoustic transducer. The high-temperature resistant composite vibrating diaphragm for the electro-acoustic transducer comprises a substrate layer, a coupled layer and a film layer; the coupled layer is positioned between the substrate layer and the film layer, and bonded to the substrate layer and thefilm layer; and the film layer is a high-temperature resistant polymer film layer. According to the composite vibrating diaphragm disclosed by the invention, the thermoplastic polyurethane film layerin the traditional vibrating diaphragm is replaced by the polymer film layer; simultaneously, the coupled layer is arranged to be bonded to the polymer film layer and the substrate layer; the environmental temperature born by the vibrating diaphragm and the whole electro-acoustic transducer is increased to be above 265 DEG C from the traditional 75 DEG C; the application filed of the electro-acoustic transducer is enlarged; simultaneously, the electro-acoustic transducer also can have more production processes; particularly, the electro-acoustic transducer can perform high-speed assembly by adopting an SMT process; and thus, the production efficiency of the electro-acoustic transducer is increased.
Description
technical field [0001] The invention relates to the field of electrical components, in particular to a high-temperature-resistant composite diaphragm used for an electroacoustic transducer. Background technique [0002] In the prior art, the diaphragm used in the electroacoustic transducer is a double-layer structure, including a base layer and a thermoplastic polyurethane film layer attached to the base layer; wherein, the ambient temperature of the thermoplastic polyurethane film layer cannot exceed 75°C. When the ambient temperature exceeds 75°C, the thermoplastic polyurethane film will decompose and fail, and the characteristics of the electroacoustic transducer will deteriorate, resulting in product failure. Therefore, the temperature characteristics of the diaphragm of the electroacoustic transducer in the prior art have limited the application and production of the electroacoustic transducer in many fields; for example, in the surface high-speed mounting process (SMT...
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IPC IPC(8): H04R7/08H04R31/00
CPCH04R7/08H04R31/003H04R2231/001
Inventor 薛洪明张春刚刘洋
Owner SUZHOU E AUDIO ELECTRONICS