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JPS5693087

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DESCRIPTION JPS5693087
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view of a
conventional diaphragm for a flat panel speaker, and FIG. 2 is a partially cutaway perspective
view showing an embodiment of the diaphragm for a flat panel speaker of the present invention.
3 is a partially cutaway perspective view of the core, and FIG. 4 is a cross-sectional view of a
speaker using the diaphragm. 4 · · · core, 5 · · · ring recess, 6 · · · ring ridge, 7.8 · surface material.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lightweight,
rigid, uniform performance flat plate speaker i = plate. As a conventional diaphragm for a flat
speaker, as shown in FIG. 1, skin materials 2 and 3 are attached to both surfaces of a honeycomb
core 1 having a large number of hexagonal cells. With this configuration, it takes time and effort
to manufacture the core 1, and it becomes difficult to obtain the honeycomb core 1 having
uniform characteristics, and it is easy to be deformed by stress such as compression, and the skin
materials 2 and 3 In addition, it takes time and effort for the rear 22 to be pasted, and the
pasting strength has become unstable. The present invention eliminates the above-mentioned
conventional drawbacks. An embodiment of the present invention will be described below with
reference to FIGS. In FIG. 2 and FIG. 3, reference numeral 4 is a core formed by alternately
forming ring-concave ridges 5 and / or ridges 6 having a trapezoidal cross-section with
concentric circles by light metal foil of aluminum. A skin material 8 is adhered to constitute a flat
type speaker diaphragm. According to this configuration, since the tops of the ridges 5 and the
ridges e have a flat surface, it becomes extremely easy to bond the surface materials 7 and 8 with
an adhesive, and the bonding strength is also made It will be big. Further, the core 4 can be easily
obtained by press-forming a flat plate-like material, and the uniform and stable dimensional
accuracy can be obtained. The flat type speaker diaphragm as described above is used as shown
in FIG. 43 to constitute a speaker. That is, the frame 14 is introduced to the magnetic circuit 13
constituted by the plate 10 having the center pole 9, the ring-shaped magnet 11, and the ringshaped upper plate 12; An edge 16 and a gasket 17 attached to the periphery of the diaphragm
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15 are combined, and a cone-shaped drive cone 18 is coupled to the lower surface of the
diaphragm 16-a voice coil 19 is coupled to the center of the drive cone 18, The intermediate
door of the voice coil 19 is held by a damper 20 and is not eccentric to the magnetic gear knob
21 of the magnetic circuit 13 and fitted into a speaker. As described above, since the flat speaker
diaphragm of the present invention is configured, the core has a trapezoidal cross section close
to a triangle, so that deformation due to pressure is small, and the trapezoidal cross section has a
ring shape on the same circumference. In this case, a very uniform and good quality diaphragm
can be obtained, and since the core is easily obtained by press molding, it can be easily
manufactured with a low value of 4, easy to apply a surface material, and excellent in strength. It
is a dog of practical value.
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