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JPS5767492

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DESCRIPTION JPS5767492
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing a
speaker diaphragm using a conventional cam-like core, and FIG. 2 is a view showing an
embodiment of the present invention. 3 is a perspective view of a mold according to the present
invention, FIG. 3 a is a perspective view of a mold, and FIGS. 3 b to 4 are cross sections of
respective steps. FIG. 4 is a perspective view showing another embodiment of the present
invention. 10 иииииии Upper sheet member, 11 иииииииииииииииииииииииииииииииииии Foaming agent, 13
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Vibrating plate Corrected correction 56.2. , ??
[Detailed description of the invention] ''. '' 8 '' 'Itl' lu% F ,: 'Plfill; +7)' 1-'relates to the diaphragm
for 7'. A diaphragm for a general flat-plate speaker in particular has a shape as shown in FIG.
That is, the flat diaphragm (4) is configured by bonding the sheet members (2) and (3) to the
upper and lower surfaces of the honeycomb core (1) made of a metal plate such as aluminum.
However, in the upper diaphragm (4), the bonding area 1-17 of the core material (1) (, because
the scale is extremely small, bonding with the sheet-like members (2) and (3) is difficult Not only
that, but also partial peeling has often caused problems such as a slick. The present invention
eliminates the above-mentioned drawbacks, and is lightweight and easy to manufacture. A
speaker vibration treatment which is superior in rigidity and excellent in frequency
characteristics. See the drawings below and see the present invention! An example will be
described in detail. First, the second weir is an L-two view showing the whole of one of the
speaker vibrating weirs according to the present invention. (10) is an upper sheet member, (11)
is a lower sheet member 10) (11) k- is filled with a foaming agent (12) such as a hard foam or
fretan to form a diaphragm (13). Since the diaphragm (13) shown in FIG. 2 is formed by about 1
of (a) to (f) of FIG. 3, it will be described in order below. First of all, what is shown in FIG. 3 (a) is
the mold used in FIG. 3 (b) to <r> and only the mold in FIG. 3 (a) i is the one in FIG. 3 (a).
Although not shown, the envy of the other side (bottom) also has substantially the same shape,
and the metal mold shown in FIG. 3 (a) can be described as 1-lower mold <14) (15) The space
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1
(18) formed by the seven parts (16) (17) of the mold (14) i15) is a weir with the movable plate
(13). That is, in FIG. The upper sheet 1 part + A (10+) is similarly applied to the mold part <16) of
the mold section 114), and the lower sheet section to the lower part of the lower mold (15). As
shown in FIG. 3 (C), the lower sheet member (11) is filled with a foaming agent (12), as shown in
FIG. 3 (d). The foaming agent (12) is pressed by the upper mold (14) together with the sheet
member (10) as in E), and the foaming agent (12) filled in this state is cured, the foaming agent
(12) and "-I; -1 member (10) (11) are bonded without using adhesive means such as a snap
adhesive, and after that, as shown in FIG. 3 (e), Of the lower sheet 3-part 0 (10) (11) and the
foaming agent (12), the unnecessary part of the sheet out of the crucible to the press crucible in
the upper mold (14) is cut 5- (21!
If it is cut out in 8) and removed from the lower mold (15) as shown in FIG. 3 (f), it is completed
as a flat plate type vibration # 1 (13). In addition, what is shown in FIG. 4 is another embodiment
of the present invention, in which high and middle low-a diaphragms (19), (20) and (21) are not
shown in the form of a mold. By changing the configuration, if it is formed, it is possible to
simultaneously create a full-range coaxial timbre board for loudspeakers. The diaphragm (13)
shown in FIG. 2 which is formed by the black and white in FIGS. 3 (a) to 3 (f) described above has
the upper and lower seal members (10) (10) as described above. 11) In addition to the simple
configuration 4 due to the foaming agent (12) filled in between, the shape can be freely changed
by changing the mold, and using an inoculum specially (up and down when the foaming agent is
cured) The sheet portion and the foaming agent are bonded. Furthermore, it is possible to adjust
to a desired weight and rigidity by changing the foaming ratio of the foaming agent 4-. Therefore,
since the diaphragm of the speaker of the present invention does not peel off from the
honeycomb diaphragm because the bonding between the foaming agent which is the core
material and the upper and lower sheet members is over the entire surface, Not only there is no
acoustic deterioration, but because it can be made into a desired shape by changing to a mold, it
is possible to apply it to any type of clip such as a speaker for high-rise products for bass layers.
Also, by changing the expansion ratio and thickness of the foaming agent arbitrarily, it is possible
to easily obtain a band suitable for the low band, middle or high band, etc. It is effective.
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