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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
loudspeaker. 2 and 3 are sectional perspective views showing the diaphragm edge portion of the
conventional speaker, FIG. 4 is a sectional perspective view of the embodiment of the present
invention, and FIG. 5 is the diaphragm of the embodiment of the present invention FIG. 6 is a
partial plan view of an edge portion, and FIG. 6 is a cross-sectional perspective view of another
embodiment of the present invention. A4・・・・・・リブ。 -N-1-95-Actual opening 5058741 (2) 2 2 l 寸 3 寸 4 オ 5 一 1 1
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm for a
speaker using an elastic body at an edge portion. The edge L of the conventional spill cover 1
diaphragm, a wave shape as shown in FIG. 2 and a semicircular cross section which is not
suitable for the third examination are common, but there are! ! At the end of the stock,
resonance. Non-linear distortion is caused by various factors such as rolling, and the acoustic
patent with the speaker C is deteriorated. The present invention is a speaker diaphragm having
an edge portion for the purpose of eliminating the above-mentioned drawbacks. An embodiment
of the invention will now be described with reference to the drawings. As shown in FIG. 4 and
FIG. 5C, according to the present invention, a continuous two-page groove 2 is formed in the
circumferential direction of a two-page semi-circular edge portion 10 made of an elastic material
such as urethane rubber or butyl rubber. It will be provided. Also, ribs 4 may be provided on the
lower part of the upper groove 2 in FIG. By so doing, the #e moving plate 3 # 'i, when the
amplitude is large, the amplitude in the vibration direction is made sufficiently G ′ ′, and it is
possible to prevent the co-diction that has conventionally tended to occur at the edge. In
addition, the rolling phenomenon in the circumferential direction of the edge portion J can be
suppressed because the cross-sectional area of the edge portion 1 is reduced by the rib or the
groove. As described above, this note (r (can prevent the resonance of the edge and can suppress
the rolling phenomenon of the edge, and can make the error portion follow the large amplitude
of the G1 diaphragm sufficiently) The practical effect is great. 4 drawing CJflFl simple description
xpFi is a cross section ν of the conventional speaker. FIG. 2 and FIG. 3 are cross-sectional
perspective views showing a 6 mm plate edge portion of the interfering speaker. Fig. 1184 It is a
cross section oblique line of this invention practical example. FIG. 5 is a partial plan view of the
diaphragm edge portion of the embodiment of the present invention. FIG. 6, page 3Q ", is a crosssectional perspective view of another embodiment of the present invention. l-one engine rho, 2one groove, 3- one diaphragm, 4--rib utility model climbing agent sales agent attorney patent
attorney Haruo Oki +1 Figure □ + 21 pieces / 坤 囚 4 囚 / 1 C 8 Su 3 figures-11 figures and te
figure figures 5 figures 4 's out 6) 2 (3 husbands 枦 顆 d 代 町 町 4 + + 神 1, +, + 6744 address
change notice 1949 February 16 Patent Office Secretary Hideto Saitoh display of the case Showa
42 utility model registration application No. 111898 No.2 name of the device idea-relationship
with a person who changed the address to 3 cases Applicant's former address Tokyo
Metropolitan Ota-ku Omori-ku 4-15-5 New Address 1000 153 Tokyo Meguro-ku Meguro-ku 1chome 4-1 (50)) Pioneer Co., Ltd. Representative Ryozo Ishizuka ・ ・ ・ '' N, /ゝ --2-
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