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Description 11 Title of Invention
Speaker diaphragm having a honeycomb structure
3. Detailed Description of the Invention The present invention relates to the improvement of a
speaker support plate having a honeycomb structure. The diaphragm having a honeycomb
structure has a structure in which a core formed into a honeycomb structure is used as a core
material, and a thin plate as a skin material is adhered to both surfaces of the diaphragm. In the
diaphragm having such a honeycomb structure, conventionally, AI or the like is known as a
material of a honeycomb core, and AI foil, 'li foil, Be foil or the like is known as skin powder. Such
a skin material is required not only for the purpose of blocking air before and after the
honeycomb core but also for the purpose of supplementing the rigidity in the direction
perpendicular to the axis of the honeycomb core in view of suppressing the low density. The
Considering such requirements, the AI foil has a Young's modulus (E = 0, 708 × 1012 dy T / rr)
in proportion to the density (f′−2,699 yβ). ) Is small, and also the Ti foil has a density (!? =
4.541 / att ', is extremely large. Furthermore, although the BeIr1 density and Young's modulus
both meet the above purpose, they have processing problems such as being extremely difficult to
form in a foil shape. Therefore, conventionally, although the physical properties are not
necessarily sufficient, one foil has been most widely used from the previous processing. Thus, the
present invention achieves the above-mentioned requirements by forming the skin material from
a low density lithium nitride foil (hereinafter referred to as Mg alloy), which will be described in
detail below. Lithium nitride has a density p = 1. sQ '71 / d, Yang EndPage: 1 with blow-off rate E
= 0. 405 X IU 12 d "of the chain, not having the advantageous features except that the density is
small compared to the physical properties of the AI and 11 . However, when it is formed as a skin
material of the same weight as other metals due to the low density, it is possible to greatly
increase the shape rigidity by obtaining a large thickness. That is, in comparison with the
conventionally used 10 μ thick Al foil, when All is molded into a skin material of the same
weight and area as that of the All itself, in the case of 11, its thickness is 5.9 μ, and titanium IJ In
that case, its thickness can be 17 ° 9μ. And, when comparing Eh '/ 12 (where E: Young's
modulus, h: thickness), which is a measure of the rigidity of the Allfi and' I'i foils, and the tinated
lithium foils, the case of ° A1 foils 0.059 dY ′ ′-t′ll, −I′i foil t7) 0. g 17 dyn−n, while
tinno lithium foil 0.19 dyn−.
1 and its stiffness increase significantly. The same machinability as the 10μ thick Al foil
corresponds to the thickness of the lithium nitride foil 12. This can be achieved by making the
thickness' 0 μ. Thus, by using lithium titanate as a skin material of a diaphragm having a fly cam
structure, the weight of the conventional Al foil is the same as that of the conventional Al foil (/ 1 compared to the one using 1'i foil). In this case, the rigidity can be significantly increased, and
if the same rigidity as Al foil is required in design, the weight can be reduced, which contributes
to the improvement of efficiency as a speaker. It is an invention very useful practically.
Furthermore, since tin cinnamate r / 'i is extremely ductile, it can be easily formed into a foil.
Patent applicant Onkyo Co., Ltd. No. 1 (1) Corrected (spontaneous) special liver director 1 巌 /,
indication of the case l (8 phase 55 years patent egg No. 46496) 0 name of the invention 0 name
of the invention fly cam structure I have a speaker diaphragm 3 with, the relationship with the
person who corrects Jj (principal) representative control & 5 generations Takeda 9 generations I
will correct as shown in the attached sheet. (Gregnation 1) Correct the description of "Silicum
trichum foil (hereinafter referred to as Mg alloyed metal)" on page 2 17 of the specification as
"from lithium nitride foil". (V. 2) On page 8, lines 13 to 18 are corrected as follows. [And, if you
compare Eh 3/12 (where E: Young's modulus, h: thickness), which is a measure of the rigidity of
the above h-, e 憤 and T1 foils, and the corresponding silicon foil, it is In the case of nitrogen, it is
59ayn-cm, and in the case of Ti foil, it is 17 dyn · cm. On the other hand, silicon chikumu foil
significantly increases its 11 properties to 198 dy · cm. 」EndPage: 2