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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker diaphragm edge of a speaker unit used for audio equipment.
2. Description of the Related Art In a conventional speaker unit of, for example, a cone-type
speaker diaphragm, an annular edge is attached to the periphery of the speaker diaphragm, and
the back of the outer periphery of the edge is attached to the speaker frame. An annular gasket is
attached to the corresponding front face. When the speaker unit is attached to the wall surface of
the cabinet acoustic device with a screw or the like, the gasket is interposed and fixed.
In the conventional speaker unit as described above, air does not leak in the fitting portion
between the rib of the cabinet and the speaker frame, so that air may leak or may be wrinkled.
There was no problem that distortion sound was generated. However, on the other hand, the
current situation is that the production cost has risen and the solution has not been achieved
SUMMARY OF THE INVENTION The edge for a speaker diaphragm according to the present
invention is characterized in that the fitting portion of the cabinet is thickened over the entire
periphery at the outer peripheral edge.
[Operation] By making the fitting portion with the cabinet thick, the speaker diaphragm edge
does not cause a gap such as air leakage when the cabinet is assembled without increasing the
manufacturing cost. It is possible to prevent the generation of distorted sound due to air leakage
and the like.
diaphragm edge according to the present invention will be described with reference to the
In FIG. 1, reference numeral 1 denotes a support plate having a center pole 2 protruding from
the center of the upper surface, and the magnet 3 and the upper plate 4 are sequentially
mounted and fixed on the support plate 1.
Reference numeral 5 denotes a voice coil which is loosely fitted to the upper portion of the
center pole 2 and supported by the frame via the damper 6. A peripheral portion 8 'of the
diaphragm 8 and a peripheral portion 7' of the frame 7 are connected to an upper portion of the
voice coil 5 by an edge 9 formed in an annular shape.
The edge 9 comprises an inner peripheral edge portion 10, a curved portion 11 and a fitting
portion to be fitted to the speaker cabinet as shown in the cross sectional view of FIG. It is
formed as a sufficiently thick portion than the thickness of.
In the case where the edge 9 is made of urethane foam, it is general to thermoform a raw
material of 5 to 10 mm in thickness to a finished thickness of about 0.5 mm using a mold.
Therefore, by processing the mold 13 as shown in FIG. 3, the fitting portion 12 of the edge 9 can
be realized without adding any new parts.
In the above embodiment, although the fitting portion 12 has been described as being convex,
the same effect can be obtained by forming the fitting portion 12 in a concave or wave shape,
and the shape of the edge is not limited. Further, the material of the edge is not limited to
urethane foam.
According to the present invention, since the edge for the speaker diaphragm according to the
present invention has a configuration as shown above, when the speaker unit is attached to the
cabinet, the fitting portion 12 is compressed to the rib of the cabinet and the cabinet is And the
peripheral portion 7 'of the speaker frame 7, and even if the cabinet or the frame 7 is distorted,
the sound wave or air leaks from this portion without adding any new parts. Can be prevented.
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