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Description of the Invention A mechanical-electrical converter comprising a wire made of an
aluminum-silver alloy as a mechanical-electrical transducer coil wire.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electromechanical
transducers of the moving coil type, such as for example speakers, microphones, headphones
etc., in particular the wire of the voice coil. In the moving coil type electromechanical transducer,
the requirements for the voice coil wire that governs the drive are not only maintaining the
required electrical characteristics, but also lightening as a driving source, strength, heat
resistance, as well as a coil shape. Winding technology conditions for looeing become a problem,
especially the finer the more detailed it becomes. Conventionally, as a wire material used for a
voice coil, copper (oxygen-free steel), aluminum, copper clad aluminum, copper-silver alloy,
copper plating copper wire etc. are mentioned. The type, wire diameter, shape (round wire, flat
wire), etc. of these voice coil wires are selected according to the purpose, but when the necessary
condition of @ pitch-j property is included, the clothes (shown in 11 Street aluminum benefits. In
addition, the edge material of the voice coil is often deformed in diameter or thinly deformed (flat
angle axis) such as the #J line purity as expansion of the space factor per unit surface precision
and further promotion of high sound quality, and basic conduction Influenced by the purity and
strength of the material. The higher the purity of aluminum etc., the lower the strength and
elongation, the easier it is to break off, which makes it difficult to handle as a shaft material, and
coating # of insulating layer, fusing layer and coil bobbin as coil bobbin # 1 technology Place
directly. The present invention provides a coiled wire material of a mechanical ta transducer
pressed as EndPage: 1 which can increase the mechanical strength without losing the electrical
characteristics of aluminum in view of the above-mentioned points. In the present invention, an
aluminum-silver alloy which is alloyed by adding a small amount of a button which is a good
conductor to other good conductor metal, i.e., aluminum, has a specific resistance equivalent to
that of aluminum and improved mechanical strength It constitutes a wire rod. Generally, when
two metals form a solid solution (? For example, metal elements of kQ-kg, kQ-Au, Ag-Au, and m ·
mmas) form a crystal lattice, and if the size of the separated atoms is the same, it becomes #f
structure mixed with lattice points, When electrons move in this atomic arrangement, energy loss
occurs and the electrical resistance increases. Therefore, in consideration of these phenomena, in
the aluminum-silver alloy described above, the best results can be obtained when the amount of
soot to be doped is 10% or less, preferably 3 to 5%. The following shows the characteristics of an
Ag-Ag alloy formed by mixing 5% of aluminum (purity 99.999) K.
The wire rod for the adrenal gland was made to be eutectic alloyed by a vacuum bath melting
method, and manufactured through a usual thinning process (including annealing). Table 2
shows tensile elongation at break with the same wire diameter. According to Table (2), compared
to the cylinder purity aluminum, the aluminum-silver alloy has a strength improvement of 6
times stronger and lower elongation. This makes it possible to wind tightly and strongly when
made into a voice coil, and makes it possible to reduce electrical and mechanical distortion due to
elongation, and also to reduce the compressive strength (longitudinal and lateral) as a wire ring,
and the strength due to deformation and imaging. It is something that can be improved such as
deterioration. Table (3) shows the resistivity and the density of the wire. Table (3) From the
above-mentioned Table (3), it is recognized that in the case of aluminum-saponifiable alloy, the
conductor can be made a good conductor without raising the specific resistance than pure
aluminum niune. As described above, according to the present invention, a coil wire with
improved mechanical strength can be obtained without losing the electrical properties of
aluminum, and the improvement of mechanical-electrical conversion characteristics as well as
the acoustic characteristics can be improved. It is particularly suitable for use in voice coil wire
materials such as moving coil type speakers, microphones and headphones. EndPage: 2
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