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DESCRIPTION JPS62115998

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DESCRIPTION JPS62115998
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of assembling a speaker for mounting a tunoid on the top of a magnetic circuit using a
gauge and centering a vibration system unit by the guide. [Prior Art] Generally, as a simple
positioning method, a method of assembling a loudspeaker according to a drop-in method of a
vibration system unit is to form a recessed portion 10 on the upper surface of a plate 9 as shown
in FIG. It consists of a voice coil 6, a ring 8 and a washer 7 (the noise system unit has been fitted.
[Problems to be Solved] In this case, since the recessed portion 10 is cut directly into the plate 9,
it is necessary to look at the amount of depression equivalent to the effective plate thickness, that
is, the depth equivalent of the recessed portion 10 In the case of machining, it is generally
difficult to obtain precision in the inner periphery machining of the hole than machining the
outer periphery of the shaft. There has been a drawback that variations are likely to occur. In
addition, the cut depth of the recess 10 is likely to vary, and the smaller the diameter, the larger
the influence. -Product and Item Although careful processing enables maintenance of accuracy,
the manufacturing cost is high, and when considering the price as a mass-produced product, it
must be compromised as a product with considerably low accuracy. And when it assembles to a
speaker, a variation arises between the center of the voice coil 6 and the center of the center pole
4, and there existed a fault to which the band characteristic of a speaker becomes unstable.
[Means for Solving the Problems and Embodiments] The present invention was invented in order
to eliminate the above-mentioned drawbacks, and the embodiments shown in the drawings will
be described with reference to FIGS. 2 (a), 2 (b) and 2 (c). As shown in FIG. 3, a plurality of guides
1 are fixed to the upper surface of the plate 2 using a center gauge 11 and fixed with small
screws in this embodiment, but the invention is not limited thereto. A ceramic circuit is formed
by the plate 2, the magnet 3, and the center pole 4, and a vibration system unit including the
diaphragm 5, the voice coil 6, the washer 7, and the ring 8 is inserted at a position where the
12-04-2019
1
guide 1 is regulated. It is an assembly method of the speaker. According to the present invention,
since the assembling method as described above is used, the material of the plate 2 can be small,
and furthermore, the formation of the guide 1 on the plate 2 is extremely easy, so that the
manufacturing cost is increased. Since the degree of concentricity between the inner
circumference of the guide 1 and the center pole 4 can be accurately maintained, the guide 1
holds the vibration system unit with high precision. The voice coil 6 is positioned on the outer
periphery with uniform dimensions, so that variations in speaker characteristics can be
eliminated.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is an assembled sectional view of the conventional speaker vibration system, and FIGS. 2
(a) and 2 (b) are assembled sectional views of the plate portion of the inventive speaker,
respectively 2. FIG. 3 is an assembled speaker of the inventive speaker FIG.
1 is a guide, 2 is a plate, 3 is a magnet, 4 is a center ball, 5 is a diaphragm, 6 is a voice coil, 7 is a
washer, 8 is a ring, and 11 is a center gauge.
12-04-2019
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