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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
cone type speaker, and more particularly to a cone type speaker in which measures against
rolling vibration are applied to a cone type speaker. [Background Art] First of all, the trend
toward miniaturization of speaker systems is intensifying, and high compliance vibration
systems, in particular diaphragms, are needed for improvement of low-range reproduction
characteristics, and they are used as a platform. In such a diaphragm with hyphen priority,
weight balance becomes unbalanced due to the presence of a tinsel wire connected to cone
paper, solder, etc., and rolling occurs during piston movement, resulting in abnormal vibration in
the middle range, and voice coil rubbing In some cases, abnormal noise may occur due to the
vibration of the diaphragm. Japanese Utility Model Publication No. Sho 57-10155 can be
mentioned as a representative of such prior art. [Problems to be Solved by the Invention
Although such prior art can achieve weight balance, it requires a process such as bonding, which
is very troublesome in production, and may be expensive, so it is a perfect name measure. I can
not do it. Then, this invention aims at solving a problem on production by forming a weight
balance at the time of formation of a vibration system. [Means for Solving the Problems] In order
to achieve the above object, the present invention is directed to a cone type speaker configured
to supply an electrical voice signal to a voice coil through a tinsel wire. The present invention is
characterized in that a stripe portion is provided at the time of edge molding with respect to the
vibration system of the speaker, and the uneven portion is formed on the back side of the edge.
The uneven thickness portion is formed on the front side of the edge, and further, the uneven
thickness portion is formed on the edge of the edge and formed integrally with the diaphragm. It
is a thing. [The production problem is solved because the balance weight is formed at a
predetermined position when forming the working sleeve on the diaphragm. Hereinafter, an
embodiment of the present invention will be described with reference to the attached drawings.
First, in these drawings, reference numeral IO denotes a cone-shaped diaphragm, and an edge is
formed on the periphery of the diaphragm 10 by insert molding or the like. On the back side of
the edge 11, a balance weight W as an uneven thickness portion located on a radial line
including a tinsel wire in plan view is integrally formed at the time of injection molding of the
edge. The weight, size, and position of the balance weight W are determined so as to be balanced
when the tinsel wire k is attached to the diaphragm lO.
Specifically, as shown in FIG. 2, a balance weight W may be provided near the connecting portion
of the edge 11 and the diaphragm 10, or may be provided on the back side near the periphery of
the edge 11 as shown in FIG. Furthermore, the balance weight W can be formed on the back side
of the joint portion between the edge 11 and the diaphragm lO (Fig. 4), and the balance weight W
can be formed on the edge of the inner peripheral edge of the edge 11. Can also be formed (j
[Fig. 5]), and can be formed near the outer peripheral edge on the front side of edge 11 (1! 6). It
is convenient when attaching a tinsel wire if the edge etc. is marked so that the position of the
balance weight W can be visually recognized from the front side. In the above description, the
balance weight is provided only on the same diameter line including the tinsel wire, but the
balance weight may be divided as shown in FIG. [Effects of the Invention] As is clear from the
above description, according to the present invention, since the rib portion is simultaneously
formed at the time of forming the edge, the unbalance generated in the diaphragm can be
reliably made. In addition to the effects such as no occurrence of rolling when driving the
diaphragm and no abnormal vibration, the resonance of the edge can be changed, and the
characteristics are also smooth.
Brief description of the drawings
FIG. 1 is a plan view of the vibration system of the loudspeaker according to the present
invention, and FIGS. 2 to 6 are partial enlarged sectional views showing an embodiment along
FIG. 1 XX, and FIG. It is a top view which shows an example.
IO · · · Diaphragm, 11 · · · · · · · · · · · · · balance weight, k · · · 錦 wire