JPS5718197

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DESCRIPTION JPS5718197
Description of the Invention 9 Name of the Invention Diaphragm for Speakers (11 meshed
substrate made of silicon carbide "A fiber, and vibration basics", said meshed substrate is a
moving plate The following song is J collected in the next track and made into a single symbol: a
speaker vibration 1 starvation 3 Detailed description of the invention ν + 411 This invention
relates to a speaker diaphragm, more specifically a light The present invention relates to a
speaker diaphragm that is a layer and is excellent in heat resistance. Loudspeaker diaphragms
have low quality as material properties, high Young's modulus, high rigidity, low internal loss,
etc., and they are satisfied with these various requirements. J, J and J, diaphragms such as metal
are used 3, these diaphragms have a drawback while falling down too long, and there is a defect,
and it is used in the form of a single material to compensate for it Very scary, many are used as a
mixture or complex with other materials. For example, in the case of pulp, a glass fiber or
collagen is mixed into a valve to improve moisture resistance and heat resistance g, and further,
acrylic, ll11! Carbonize the fiber in inviscid gas at the same temperature? U-carbon fiber is mixed
to improve Young's modulus, and heat resistance is further increased. In addition, as a diaphragm
material of a light layer and a surface strength, a woven and fine reinforced type of Matsuya
material has been developed or has a defect. As for IJ E, carbon fiber coated with vacuum plating,
Ij1 carbon #R string coated with ceramic coating, VCll, alumina fiber and Yahata accumulated
fiber have been developed. There is a problem that the material itself is a market price and it can
not be accepted in the general market, or the strength deterioration in the sieve portion is
remarkable, and it can not be used as a diaphragm. Therefore, the present invention is intended
to obtain a diaphragm having a number of characteristics and thus no defects in specific softness
characteristics, by means of the entire material having characteristics that can not be beaten by
the conventional loudspeaker diaphragm alone. In order to compensate for the decrease in
Young's modulus and the decrease in tensile and compressive strength caused by the thinness of
the EndPage: 1 thin film, the weight of the metal material is reduced by weight. It is characterized
in that the carbon fiber buildup fibers are embedded in the surface to improve Young's modulus,
tensile pressure and pressure, and mechanical and physical strength. Hereinafter, embodiments
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of the present invention will be described with reference to the attached drawings. First,
reference numeral 10 in FIG. 2 denotes a dome-shaped diaphragm, which has a low melting
point, and is made of a thin aluminum diaphragm which can be heat-sealed with a C11 'function
and a small-sized slip sheet. In the next surface of the substrate l /, a mesh-like substrate /
formed of a silicon carbide fiber material is embedded.
In order to form the diaphragm 10, the upper and lower -12 "molds that can be pressurized and
heated are used, and as schematically shown in FIG. The reticulated silicon carbide fiber material
t-stack is pressure heated to a pair of molds. In this mold, 2 has a cavity sufficient to obtain a
dome-shaped diaphragm, the upper mold has a heater 11, and the lower mold is an extrusion
mold that extrudes a location corresponding to the dome 113 minutes. Fully equipped, the heater
has at least the surface r of the aluminum sheet / the hot valley in the semi-molten state.
Therefore, the laminated sheet of aluminum thin plate and silicon carbide fiber material is
stacked in a mold, and firstly, a part of the flange diaphragm 1s of the dome-shaped diaphragm is
covered, and the extrusion of the lower mold is carried out Work out the dome part, with 2I
protruding into the mold. In the state where it is lowered by 2 in forming φ, it is heated by the
heater, and the surface of the aluminum thin plate / is in a molten or semi-molten state, so silicon
carbide is applied by pressure. The fiber material λ is embedded from the next surface of the
aluminum thin plate l. Then, by releasing the mold from J, a diaphragm is obtained with cooling.
When the silicon carbide fiber material is embedded from both sides of the thin aluminum sheet,
the diaphragm shown in the enlarged cross sectional view of FIG. 3 is obtained. In this case, it is
necessary for the mold to have heating means in both upper and lower molds. Physical
characteristics and characteristics of the silicon carbide fiber to arrange the characteristic of the
diaphragm for speaker If the fiber diameter 10-12μ ratio ir2.8 tensile strength 250-300 to 9 / l
1 II ++ 2 elastic modulus 20 X 103 Kg / am 2 It is. Also, the features are as follows: (1) there is
no reduction in mechanical strength at both temperatures; (2) The surface has a strong affinity M
to metals and j4. (3) The physical characteristics do not change at all even in the twotemperature Europeanization # environment. In particular, 130 (Ic does not change with tensile
strength and elastic modulus even when placed in an atmosphere of 4 atmospheres. As is
apparent from the above description, the speaker diaphragm of the present invention is
configured by embedding a mesh of silicon carbide fiber in a thin plate of aluminum, so that the
excellent physical properties of the aluminum material (in detail, , Specific gravity 2.7, tensile
strength 5-9 Kp / a ++ 2. In addition to the modulus of elasticity of 7.2 × 10 ′ ′ (m / m ′ ′),
the tensile strength of the silicon carbide fiber and the magnitude of the modulus of elasticity are
added to obtain physical properties which can not be obtained with an aluminum sheep body It is
light in weight, still stiff, still elastic, and has no split vibration.
4. Brief description of the drawings. FIG. 1 is a longitudinal cross-sectional view of a speaker
phase system moving plate according to the present invention, FIG. 2 is an enlarged sectional
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view of FIG. 1 U and FIG. 3 is a speaker according to another embodiment. Fig. 2 is an enlarged
sectional view of the diaphragm of Fig. 2, and Fig. 4 is a cross-sectional view of a mold for
explaining the manufacturing process. DESCRIPTION OF SYMBOLS 10 ... Diaphragm, l / ...
Diaphragm board ¦ substrate, / 2 ... Reticulated base l ... Aluminum thin plate, Co ... ... Silicon
carbide fiber material, ... 2 ... Mold K21: Extrusion type h: Heater Patent applicant Pioneer
Corporation EndPage: 29-1α 12 ('A) (a) EndPage: 3
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