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 JPS5521631 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are diagrams showing the structure of a conventional speaker diaphragm, and FIG. 3 is a diagram showing the structure and manufacturing method of the speaker diaphragm of the present invention, FIG. The figure is an enlarged view of the same part. 4 is a diaphragm substrate, 5 is a coating for forming a coating, and 7 is a non-air-permeable film. DETAILED DESCRIPTION OF THE INVENTION The present invention: For a speaker, which is a diaphragm for a speaker, characterized in that a non-air-permeable film is formed by a very simple manufacturing method on one side or both sides of a semi-permeable diaphragm substrate. It is desirable that the diaphragm vibrates in a wide single wave number band for piston oscillation, but for that purpose, it is desirable that the diaphragm has a large rigidity and it is difficult to cause split imaging motion, and at the same time acoustic radiation It is desirable to be lightweight to increase efficiency. In the past, a standard achievement has been used as a diaphragm base material, but recently, a foam metal such as nickel having a high degree of foaming or an aluminum ··· nickel core is assembled into a plate shape · · · · · A speaker moving plate has been developed and put to practical use, using as a diaphragm base material. These diaphragm base materials have excellent properties in that they are large and lightweight, but they have the following deficiencies. That is, the foam metal 'has a cancellous structure having a three-dimensional network 1. Also, a structure in which a honeycomb core (which is hollow) of nikham taa body 1d aluminum is assembled in a plate shape and adhered Because both types of moving plate base materials have air permeability, as the vibrating plate, as shown in FIGS. 1 and 2, one side or both sides of the metal foam (1) and the honeycomb structure (2) Non-airpermeable aluminum foil and synthetic resin 3 fats: Therefore, such a bonded structure is poor in workability and inferior in mass productivity, and also has disadvantages such as the increase in the mass of the movable plate due to the aluminum shop and the synthetic resin / to (3) and the decrease in the acoustic activity rate. was there. In the present invention, such a conventional 10-05-2019 1 defect is eliminated, and a single-sided or double-sided film of a yarn composition for forming a film is blown in the form of fine fibers on one side or both sides of a breathable diaphragm substrate such as foam metal and nick structure. To form a non-air-permeable film. An embodiment will be described below with reference to the drawings. A foam metal molded into a cono shape is used as a diaphragm base material (4), which is subjected to a degreasing step to remove oil and dust. This degreasing step can be omitted if no oil or dust adheres to the base material (4). {Circle over (1)} 100-parts by weight of a yarn coating (5) such as "Fan-T-Da" (trade name: Two Ohashi Chemical Industry Co., Ltd.) diluted with 40- After dilution with 100 parts by weight, it is jetted in the form of fine fibers from a distance of about 100 a by compressed air A (3 to 4 K9 / d) using a gun 4 with a 1.5 to 3 gun bore (6) (4) to form a spider-like, interspersed foundation layer suspended like a bridge in the pores of the substrate (4). The coating process of this roving is for increasing the adhesion of the coating composition-use yarn coating (5) to the surface of the substrate (4), and the substrate (4) itself is a coating for the coating composition. It may be omitted if it has strong adhesion to the adhesion of 14 (5). ■, Coating fine yarn of coat-forming random yarn paint (5) by spraying a large amount of thin film (intermediate, '1i1) coating on the foundation layer with many spider web-like gaps by coating coarse yarn coating and non-air-permeable film (7) After diluting 100 i parts by weight of the coating composition forming yarn (5) with 80 to 200 parts by weight of a dilution liquid (/ noner), which is a step of forming a film and thickness as much as possible. According to (6), the mixture is jetted in the form of fine fibers from a short distance of 20 to 30 cmt D, and the surface of the base layer is applied with a gauze 5 to form a non-air-permeable coating (7) of a certain thickness. 11)) By coating only the coating fine yarn (intermediate layer) of the knob layer, a non-air-permeable film (7) is formed, but still more sufficient non-air-permeable property is obtained and the surface is made smooth It is a process to make it look like the surface of leather, and it may be omitted if necessary. After diluting 100 parts by weight of the yarn coating (5) for film construction with 150 to 250 parts by weight of a diluted solution (nonner), spray in the form of fine fibers from a short distance of about 20 pots and spray on the surface of the intermediate layer Form the top layer. {Circle over (3)} Drying and drying are carried out under the conditions of 50 to 60 ° C. for 20 minutes (hot air drying). Here, a polyurethane-based paint having the property of being able to be spray-painted into fine fibers by spraying with a spray can is used as a yarn coating for film construction, but the same non-air permeability is also possible with, for example, a vinyl chloride-based paint A film is formed. Although the foam metal is used as the diaphragm substrate in this embodiment, it may be a breathable diaphragm substrate such as a nick structure. In this way, the film-constituting yarn coating (5) adheres in the form of fine fibers through the coating of the roving yarn (base layer), the fine yarn (intermediate layer), and the top layer on the surface of the pliery (4). First of all, the step of imparting non-air permeability to the substrate (4) is extremely simplified because the airpermeable film (7) is formed. That is, after dilution of the coating composition-constituting yarn coating (5) with respect to the conventional laminated structure of the base material and the non- 10-05-2019 2 air-permeable imparting material, the spray is coated with a spray gano (6) and non-airpermeable Forming coating film (7), the coating process is extremely simple, the workability is good, the mass productivity is rich, and the dilution degree, spraying distance and coating amount of the irregular yarn coating (5) for film formation are appropriate Arbitrary non-airpermeable coating (7) can be formed by setting them appropriately and combining them appropriately. Second, the weight of the non-air-permeable film (7) is about 1/3 compared to the conventional non-air-permeable material (aluminum foil or synthetic resin / to), so the increase in diaphragm mass is minimal It is suppressed to 7 and therefore there is little reduction in the acoustic activity rate. Third, the coat-constituting yarn coating (5) forms a suspended bridging film on the pores of the substrate (4) and adheres to the entire surface of the substrate (4) to form a non-airpermeable film (7). As it is formed, the adhesion between the substrate (4) and the non-airpermeable coating (7) is strong, and it has excellent advantages such as no delamination. As described in the following, the present invention is a non-air-permeable coating by spraying a film-forming irregular yarn coating (5) in the form of fine fibers on one side or both sides of the breathable imaging plate base (4). 7), which differs from the conventional laminating structure, in particular, the application process of the coating yarn coating (5) for forming the non-airpermeable film (7) is extremely simplified, and the workability is improved. It has a well-probable profit change, such as mass production. 10-05-2019 3
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