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JPS56112197

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DESCRIPTION JPS56112197
Description 1, title of the invention
Speaker's flat diaphragm
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat diaphragm
with a sweeper force. Recently, as a flat diaphragm, a diaphragm board with a No-Nicham
sandwich structure has attracted attention. As shown in FIG. 1, this diaphragm is attached to the
front side of the honeycomb core 1 made of aluminum foil or the like and to the ridge U with a
non-air-permeable skin material 2, 3t adhesive such as a vinyl chloride sheet. It has the
characteristics of light weight and high rigidity. And this flat diaphragm M has the peripheral
part to the frame B! Supported by the suspension edge 4 attached to the skin material 3 on the &
side and 1. A voice coil bobbin is attached to the skin material 3 on the back side. However, in
this structure, the process of attaching the edge 4 to the diaphragm is specially required, which
affects the cost, and at the time of high output, the heat of the voice coil is transmitted to the
diaphragm during high power VC. The expansion of air inside the capsule 1 in a sealed state
inside the core material 1 may cause the skin materials 2 and 3 to be deformed, resulting in
deterioration of the output sound pressure characteristic. EndPage: Focusing on the above points,
the present invention aims to make the back side skin material of breathable material and use its
outer edge as an edge to solve the above-mentioned problems. I assume. In the following, one
example of the main idea will be described with reference to FIG. The same reference numerals
as in FIG. 5 is a skin material made of a breathable non-woven fabric, a woven fabric, or a foam
material such as urethane, which is attached to the back side of the core material 1 of the
diaphragm and its outer peripheral edge portion 5a is It protrudes from the back and is pasted to
the frame B. That is, the outer peripheral portion 5 turtle is attached as a suspension edge
material, and a dumping agent is applied thereon, whereby a glide is performed and vibration
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isolation is achieved. As described above, since the continuous portion of the hat skin material of
the diaphragm becomes an edge, it is not necessary to attach the edge specially as in the
conventional case, and the number of forming steps is reduced, and the back 1-skin printing is
Because of the breathability, the inner capsule does not become closed, so there is no risk of
deformation such as heat, that is, there is no risk of thermal deformation of the diaphragm, and
furthermore, the sound from the front side of the transmission plate 2 # The radiation decreases,
the haze decreases, and the output sound pressure characteristic also improves.
4. Brief Description of the Drawings FIG. 1 is a partial cross-sectional view of a conventional flat
diaphragm, and a second section is a partial cross-sectional view of a flat diaphragm of an
embodiment of the present embodiment. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · EndPage: 2
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