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JPS5533548

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DESCRIPTION JPS5533548
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a cone-shaped
boronated diaphragm showing an example of the present invention, and FIGS. 2 and 3 are a
longitudinal sectional view and a plan view for explaining the prior art example, respectively. FIG.
4 is a plan view of a cone type boronated diaphragm showing an example of the present
invention, and FIGS. 5 and 6 are longitudinal sectional views of the main part showing another
example of the present invention. 1 ииииииииии Cone-shaped boronated diaphragm, 2
иииииииииииииииииииииииииииииииииииииииии.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of the peripheral portion of a cone-shaped boronated diaphragm, since the boronated diaphragm
is manufactured by impregnating the surface of the metal to be used with the boron layer, the
OH structure thereof In the process, it is necessary to set the temperature to a high temperature
(about 1000 ░ C.) 1 mK close to the deterioration temperature of the pace metal. Its rounding,
33 boronization! =% Yz) When the diaphragm is returned to normal temperature, the diaphragm
itself tends to be deformed, and in particular, a wavy corrugating sheet is produced at the
periphery of the diaphragm. The cone-shaped diaphragm adheres the edge to the same face to
form a speaker, but in this case, the above-mentioned waviness must be removed first before
bonding the edge, and the work man-hour increases accordingly. It is unreasonable. In the case
of a borated diaphragm, it is necessary to allow the boron layer to penetrate, so high temperature
treatment is inevitable. In view of the above points, the present invention is intended to eliminate
the wavy undulations generated around the diaphragm by bending the peripheral concave of the
cone-shaped boronated diaphragm up or down to form a bent portion. In the following, an
example of the present invention will be described with reference to the drawings. FIG. 1 is a
cone-shaped cylinder 'l showing an example of the present invention. The longitudinal crosssectional shape of the ronization diaphragm 1 is shown. In order to remove the wave-like ridges
generated on the outer periphery of the diaphragm, the outer periphery of the cone-shaped and
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bent diaphragm 1 is bent downward to form a bent portion 2. The bending angle of the bent
portion 2 is set to follow the cross-sectional shape of the edge 3. In addition, although the shape
of a cone | corn has shown the paracurved cone, you may use other shapes, for example, straight
co-7. FIG. 2 shows the conventional cone-made boronated diaphragm as a reference, but since
the outer periphery of the diaphragm 1 is not subjected to any processing, the high temperature
treatment for the boronization results in As shown in the figure, the waviness 4 is generated and
deformed when viewed from the plane. On the other hand, in the case of the boronated
diaphragm according to the present invention, as shown in FIG. It is done. The small 5 figures
show one example of the present invention in which the above-mentioned bent portion 2 is
corrugated. In this case, the joint 3IL of the roll edge 3 is also corrugated. FIG. 6 Fi 1 ml This is
another example of the present invention, in which the above-mentioned bending portion 2 is
bent upward. The bends 6 and 2 are adhered to the curved surface of the roll edge 3. As
described above, according to the present invention, the outer periphery of the diaphragm is bent
upward or downward to form a bent portion, and the bent portion is deformed in a shape that
conforms to the junction of the edge. Because of this, a wave-like undulation occurs in the outer
periphery of the diaphragm, so that the work for correcting the above-mentioned undulation
deformation can be eliminated as in the prior art).
Further, according to the present invention, by deforming the bent portion into corrugation or
the like, the strength at the joint portion between the diaphragm and the edge can be enhanced,
and the sound characteristics of the speaker can be improved.
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