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JPS53129927

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DESCRIPTION JPS53129927
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view of the prior art, FIG. 2
is a partial sectional view of one embodiment of the present invention, and FIG. 3 is a partial
sectional view of another embodiment. . · · · · · · · · · · · Diaphragm, 1a · · · · · · · · · · · · · · · · · · '' Patzkin.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of the edge of a loudspeaker diaphragm. Recently, in order to take advantage of the good
characteristics of planar vibration, there is a planar diaphragm in which the front surface is
formed into a flat surface by modifying the cone-shaped vibrating rod l @. This is the diaphragm
made by bonding aluminum foil to polystyrene foam alone or polystyrene, making the shape into
a substantially conical shape with the bottom of the cone as the front and the top as the back,
and a voice coil provided there . In this diaphragm, foamed polystyrene is used as described
above to achieve @quantification, but a thick wall is formed to obtain strength, and an edge! . )!
Bonding with is constructed as shown in FIG. However, this connection method is such that the
edge 2 (cloth, urethane, etc.) is adhered to the peripheral edge of the diaphragm 1 with an
adhesive, and therefore, there is a disadvantage that the diaphragm 1 is easily peeled off due to
the vibration. There is also a disadvantage that the position of the edge is also limited by the
thickness of the peripheral portion of the diaphragm. Therefore, in the present invention, a
stepped portion is formed at a local portion of the diaphragm, and an edge is attached thereto
with a patch, there is no fear of peeling, and moreover, the height position of the diaphragm in
the thickness direction is also optional. It is an object of the present invention to provide an edge
of a diaphragm which can be set. Hereinafter, the embodiment will be described with reference to
FIG. Fig. 2 is a light foam competition such as polystyrene foam? A step 1 turtle is formed over
the entire periphery of the front surface of the thick diaphragm 1 made of z% -5-tick, and the
inner periphery of the edge 2 is adhered there, and further The ring-shaped packing 3 is pressed
and bonded on the top, so that the edge 2 can be attached in a pinched state. In this case, the
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material of the packing 3 is the same as that of the diaphragm 1, or paper or rubber. That is, it
should be light and have some degree of strength. Then, according to FIG. 42, the position of the
edge 3 in the thickness direction of the diaphragm 1 can be appropriately set by appropriately
setting the depth of the step portion 1 turtle. FIG. 3 shows a slight modification, in which patkin
3 'is first adhered to step 1 turtle of diaphragm 1, then the inner periphery of edge 2 is adhered
thereon, and then patkin 3 is placed thereon. Bonding, the edge 2 is attached in a state of being
held by 3 degrees of patzoku, ♀ 3 '. According to the method of FIG. 3, the position of the edge 2
in the thickness direction of the diaphragm 1 can be appropriately set by appropriately setting
the thickness of the packing 3 'in addition to the appropriate setting of the step portion 1 turtle.
なお、4はスピーカフレームである。 The stepped portion of the diaphragm 1 may not be the
upper surface but the lower surface.
The attachment of the edge 2 to this rubbing and vibration # i1 becomes easy. As described
above, in the case of a thick diaphragm made of a light-weight foam, the present invention forms
a stepped portion around the entire periphery of the vibrating plate, and a ring-shaped pad is
formed on the stepped portion. It is the one with salt 9 added. For this reason, there is a fear that
the edge peels off with respect to the diaphragm, and the position setting of the edge with
respect to the thickness direction of the diaphragm can also be performed by the child.
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