Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS5652997 Description 1, title of the invention Manufacturing method of acoustic diaphragm unit 3. Detailed Description of the Invention The present invention relates to a method of manufacturing an acoustic diaphragm unit used for an electroacoustic transducer using an electret film or a polymeric piezoelectric film. An acoustic diaphragm unit of an electroacoustic transducer using a general electret film or a polymeric piezoelectric film is constructed by sticking the above-mentioned film 1 to a ring 2 as shown in FIG. In the conventional manufacturing method of this acoustic diaphragm unit, as shown in FIGS. 2 and 3, a large number of electrets or polymer piezoelectric films 4 are attached to the peripheral portion of the upper surface of a cylindrical base 3 and fixed. The ring 6 was attached to the film 4 with an adhesive. As this adhesive, an epoxy resin adhesive having good adhesive bond reliability was used. Then, after the ring 6 is securely bonded to the film 4, the film 4 is cut along the outer periphery of the ring 6 to obtain an acoustic diaphragm unit. In such a method, since the epoxy resin adhesive is used for bonding, the curing time is longer than 2 hours, the productivity is poor, and the property as the acoustic diaphragm is deteriorated due to the protrusion of the adhesive. However, the tension of the film 4 has to be continued until the adhesive cures, which causes the operation efficiency of the production facility to be poor, and thus has the disadvantage of being disadvantageous in cost. EndPage: The present invention eliminates the above-mentioned conventional drawbacks. An embodiment of the present invention will be described below with reference to FIG. 7 is a frame-like base, and a film 8 such as an electret film or a polymeric piezoelectric film is attached to the upper surface of the base 7 so that a large number of weights 9 are attached to the peripheral edge to have a constant tension. There is. A transparent ring 10 made of acrylic resin or glass is attached to the upper surface of the film 8 10-05-2019 1 with an acrylic or epoxy UV curable adhesive, and these are housed in a container 11 for blocking ultraviolet light. The film 8 and the ring 1o can be adhesively bonded in any short time for 2 minutes at an irradiation distance of 20 cm by an ultraviolet lamp 12 such as a mercury lamp of 100 V, 400 W provided inside. After that, the acoustic diaphragm unit is obtained by cutting the film 8 from the container 11 along the periphery of the extraction ring 10, and the wax ring 10 is made of a transparent body in order to facilitate the transmission of ultraviolet light. . As described above, since the method of manufacturing the acoustic diaphragm unit according to the present invention can be cured in a short time of 2 minutes by using the ultraviolet curing adhesive, the productivity can be greatly improved, and the adhesive can be used. There is little protrusion and stability in terms of characteristics can be measured, and the operation efficiency of facilities such as bases and weights can also be increased, and it has the advantage of being extremely advantageous in terms of production cost, and having high industrial value. It is. 4. Brief description of the drawings. FIG. 1 is a perspective view showing a general acoustic diaphragm unit, FIG. 2 is a top view showing one process of a method of manufacturing a conventional acoustic diaphragm unit, and FIG. FIG. 4 is a cross-sectional view of one step showing an embodiment of a method of manufacturing an acoustic diaphragm unit according to the present invention. 7 · · · Base · 8 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 11 · · · container, 12 · ultraviolet light lamp. -Name of agent Attorney Nakao and 1 other EndPage: 2 10-05-2019 2
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