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 JPS59194598 [0001] TECHNICAL FIELD The present invention relates to a speaker, and more particularly to improvement of sound pressure frequency characteristics of an electrodynamic speaker. Configuration of Conventional Example and Problems Thereof-In recent years, in an electrodynamic loudspeaker having a dome shape, the dome portion has been made smaller and the edge portion has been made larger in order to measure the effective use of the field portion. A conventional electrodynamic speaker will be described below with reference to FIG. 1 is a diaphragm in which a dome portion 1a and an edge portion 1b connected to the dome portion 1a are integrally molded with a resin material to a uniform thickness; 2 is a voice coil attached to the diaphragm 1; 3 is a magnet; Plates A and 6 fixed to the upper part of the magnet 3 are plates B fixed to the lower part of the magnet 3 and 6 is a frame for fixing the edge portion 1b of the diaphragm 1 to the plate A4. The operation of the conventional electrodynamic speaker configured as described above will be described below with reference to FIG. First, at a frequency below the resonance frequency of the edge portion 1b, since the dome portion 1a and the edge portion 1b driven by the voice coil 2 move integrally, no disturbance occurs in the sound pressure frequency characteristic. However, at the resonance frequency point of the edge portion 1b, a large dip and peak occur in the sound pressure frequency characteristic because the edge portion 1b moves differently from the dome portion 1a due to resonance. In particular, since this resonance frequency is generally in the audible range, the above-described electrodynamic speaker is required for a Hi-Fi speaker requiring high fidelity because the edge portion 1b is larger than the dome portion 1b. There was a problem that I could not use it. SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides an electrodynamic speaker which can suppress resonance at an edge portion and smooth sound pressure frequency characteristics. The present invention has a curvature larger than that of the convex dome portion in the hemisphere and the convex dome portion in the 11-05-2019 1 hemisphere provided on the circumferential portion thereof, and integrally integrates the convex portion in the hemisphere with the resin. Electrokinetic using a diaphragm in which a convex resin molded body in a sphere is adhered to the surface outer peripheral portion from the surface central portion of the hemispherical hollow convex edge portion and having the same curvature as that of the convex edge portion. Type speaker, which is capable of preventing resonance at a specific frequency and improving sound pressure frequency characteristics by changing the compliance of the convex portion in the hemisphere and dispersing the resonance frequency. DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIG. In FIG. 3, the diaphragms 1.1a, 1b, 2, 3, 4, 5 and 6 are the same as those shown in FIG. Dome part, edge part, voice coil, macnet, plate A, plate B, frame. And 7 is a resin molding which has the same curvature as the edge portion 1b and is bonded to the surface outer peripheral portion from the surface central portion of the edge portion 1b. The operation of the embodiment configured as described above will be described below. First, at a frequency below the resonance frequency of the edge portion 1b, the sound pressure frequency characteristic is not disturbed because it moves integrally with the dome portion 1a as in the conventional example. Next, at the resonance frequency point of the conventional edge portion 1b, since the resin molded body 7 is adhered to the edge portion 1b, the compliance of the edge portion 1b becomes uneven, so that resonance does not occur. The resonance is dispersed between the guttered portion and the non-adhered portion so that the resonance is dispersed. Therefore, it is possible to obtain a smooth sound pressure frequency characteristic in which no dip or peak occurs in the entire band within the audible range of the sound pressure frequency characteristic. As described above, according to the present invention, the resin molded body is adhered to the edge portion, the compliance of the edge portion is changed, and the resonance frequency is dispersed, thereby preventing the resonance at a specific frequency, all over the audible range. Excellent effects can be expected in the improvement of sound pressure frequency characteristics in the band. [0002] Brief description of the drawings [0003] FIG. 1 is a structural cross-sectional view showing a conventional electrodynamic speaker, FIG. 2 is a sound pressure frequency characteristic diagram of the same speaker, and FIG. 3 is a structural cross-sectional view showing one embodiment of the electrodynamic speaker of the 11-05-2019 2 present invention FIG. 4 is a sound pressure frequency characteristic diagram of the same speaker. 1 ··················································································· Voice coil, 3 ·········· , 4.5 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · molded resin body. Name of Agent Attorney Nakao Toshio has 1 person Figure 1 f Figure 2 Figure 3 Figure 4 595- 11-05-2019 3
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