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JPS5650190

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DESCRIPTION JPS5650190
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a manufacturing explanatory view of a speaker
vibrating body according to the present invention, FIGS. 2 and 4 are sectional explanatory views
of an embodiment of a speaker vibrating body according to the present invention, and FIG. It is a
graph which shows the sound pressure frequency characteristic of a speaker vibrating body. 7.9
... speaker diaphragm, 8.10.10 '... thin film.
【Detailed description of the invention】 A piece of wood is made of the same material as this
foamed shingles goods on the sound reflecting surface of the speaker camera moving plate from
the speaker camera moving body llc, foam and city oil such as styrofoam etc. : Bonding with a 傅,
悶スピーカースピーカースピーカースピーカースピーカースピーカー劾劾、
、 、 接着 接着 強 強 強 強 ピ ス ト ン ピ ス ト ン ピ ス ト ン ピ ス ト ン ピ ス ト ン ピ ス ト ン
ピストンピストンピストンピストンピストンピストンピストンピストンピス
ト ン 賑 賑 賑 賑 賑 賑 と な り と な り と な り と な り と な り 広 、 、 さ らThe purpose is to
provide a scream hJm body that can be screamed sufficiently and at low cost + “k @”. 1- 作 /?
−4-4 ′ 'Conventionally, for example, a cone-shaped speaker produces a wave-like effect on
sound frequency characteristics as a shape effect even with a piston 4'1iii @, for example, a
speaker with an apex angle of 120' and an aperture of 8 inches, around 1 KHz There is a peak of
about 5 dB and a dip of more than K10 dB near 61 GIz. The peaks and dips decrease as the apex
angle increases, and the acoustic radiation surface must be flat to eliminate the shape effect.
However, flat-plate shaped speaker diaphragms of the same thickness have lower co-imaging
frequencies than cone-shaped C, for example, a cone-shaped speaker imaging plate with an angle
of 120 °, an aperture of 8 inches, 4 in 0.5, around 7f. While the primary resonance occurs at
about 1 to 2 KH7, there is a defect that the l-flat co-fibre of the flat-plate shaped speaker
diaphragm of the same thickness occurs at about 100 to 200 Hz. Therefore, flat-plate shaped
speaker diaphragms make four people larger than in the case of a cone type, and is it bending
rigid? I have to make it bigger. Then, in order to lighten the weight of the deck-shaped speaker
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diaphragm, it is desirable to configure the speaker diaphragm with a low density. As a material of
this low temperature, conventionally, a foamed resin having a density of about 010 to 0 to 0, 0 to
0, 0 to 1 to 0, 1 to 1, and 1 is used. However, when the flat plate-shaped speaker imaging plate is
simply made of expanded polystyrene or the like, the density of the foamed resin and the
Young's modulus are in a proportional relationship, so a large density is required to obtain a
sufficient piston vibration zone. In this case, the advantage of using a lightweight foamed resin
for the speaker diaphragm is lost, and a necessary sewing can not be obtained. In reverse ('c1 if
you try to make a crane under a sweat enough, the speaker diaphragm must use a small foam
resin with a high density, and the piston serration bandwidth becomes narrow. Therefore, in an
attempt to eliminate the above-mentioned drawbacks, a speaker vibrator made of a flat sheet and
made of a foam resin and attached to a dedicated radiating surface of a plastic work plate is
proposed. The adhesion between the foamed resin and the paper is not enough to bond to a
group, and it peels off with a slight force, and further, the light rigidity on the surface is 11. The
working band of the vibrator is not sufficient.
The inventor of the present invention has constructed a speaker imaging plate made of a foamed
resin material and having a sound emitting surface of a three-pass, "mo-plate shape" or a
truncated cone shape (-1 this acoustic radiation surface is the same as the foamed resin material.
By welding a thin film made of a material, in particular, having a rigidity greater than that of the
foamed resin material, a speaker imaging body completely eliminating the above-mentioned
drawbacks has been conceived. Hereinafter, an embodiment of a speaker moving body according
to the present invention will be described. FIG. 1 is an explanatory view of the construction of a
speaker vibrating body according to the present invention, and FIG. 2 is an explanatory view of a
speaker moving body according to the present invention. That is, it is made of the same material
as the foamed resin material forming the speaker diaphragm on the lower mold I for striking
shown in FIG. 1 and is larger in rigidity than the foamed resin material, for example, high impact
polystyrene Place a thin film 2 of about 0.6 thickness or less, for example, about 0.2 to 0.5, and
insert the upper mold 3 through the lower mold 1. Lowering mold 3 (C has holes 4 and insert
primary foam raw material beads 5 of styrol into the mold from holes 45, tighten cap 6 and heat
to about 100 to 120 '° C.] Jl The foam raw material bead 5 is secondarily foamed by 4-. As a
result, a speaker moving body as shown in FIG. 2 is scooped. In the figure, reference numeral 7
denotes a speaker diaphragm made of a foamed resin material, and a sound emission surface is
flat, and 8 denotes a thin film. In this speaker imaging moving body, the speaker diaphragm 7
and the thin film 8 were made of the same raw material 1), so the welding power was strong, and
the thin film did not peel at all even in rough handling. And, when the speaker diaphragm and the
thin film are adhered, they can be adhered without using an adhesive, that is, they can be bonded
as a starting material bead; the thin film can be adhered when heated for foaming, and the
speaker imaging body is extremely easily lv +- It can be manufactured. Next, FIG. 3 shows the
results of measuring the caesar frequency characteristics of the thus-produced loudspeaker-1
beater. In the figure, in the case of the sph-H-H moving body according to the present invention,
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the solid line is the thin dotted line on the acoustic emission surface, and in the case of the
frustoconical speaker vibrating body made of foamed rubber without 戊The stack is a paper
lipped to the sound l # radiation surface of a frusto-conical shaped speaker imaging plate made
of foam resin (if it is also 5-phrase, ...,-: z. As a result, when the thin film is not formed and when
the paper is Chinese, the piston imaging range is narrow, for example, a peak occurs at about
600 Hz, and the use band of the speaker is extremely narrow. On the other hand, in the case of
the speaker moving body according to the present invention, a peak occurs at about lKH2, and
the peak height is low, the piston vibration band becomes wide, and the speaker use band is
wide.
Moreover, since the speaker diaphragm is made of a foamed resin material, it is fine and sound
pressure can be sufficiently obtained. It should be noted that the thin, 漢, etc. are formed on
other than the acoustic radiation surface of the speaker diaphragm (and the piston vibration zone
becomes wider, and as shown in FIG. 4 t, the acoustic radiation surface of the speaker diaphragm
9 If the opposite side of is formed in a dome shape and the acoustic radiation surface and this
dome-like portion are formed with '/ lit 10, 10', the piston vibration zone is further broadened. In
addition to the above, as the foamed resin material, there are urethane foams j (voices of the gods
and the like). 6−7 7. As described above, in the speaker vibrator according to the present
invention, since the thin film made of the same material as the foam + 1.1 material is welded to
the perspiration radiation surface of the foam resin material made of a foamed resin material, the
speaker The adhesion between the film and the thin plate can be firmly adhered without
adhesive, is it adhesive? It is light enough not to be used, 1 sound is so loud, and the speaker
moving plate is composed of 1 finger ring, so the speaker 4 frame is purchased and sufficient for
sound. The speaker piston vibration band is wide and the sound quality is slippery on the surface
1tIilll property of the speaker vibrator, and furthermore, it is a person who welds the speaker
diaphragm and the thin film, so that the cost can be reduced. ? Have.
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