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JPS5353326

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DESCRIPTION JPS5353326
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a cone-type speaker
according to the prior art, and FIG. 2 is a cross-sectional view showing an embodiment of the
cone-type speaker according to the present invention. 4 и и и Frame, 6 и и и Corn paper, 8 ? ? и и
First ring, 9 иии Second ring.
DETAILED DESCRIPTION OF THE INVENTION The present invention reduces distortion due to
the edge of the bass in the bass so that it can withstand large amplitudes, and flattens the sound
pressure frequency characteristic by eliminating the edge resonance in the middle sound Also
relates to a cone type speaker to be performed together. Figure 1 shows a cone-type loudspeaker
in the prior art; h2b, 1 is a magnet, 2 is a center pole, nos 5 1/2 plate, 3 is an upper plate, 4 is a
frame, 5 is a voice coil, 6 is a cone paper, and 7 is a damper. Heretofore, in this cone type
speaker, (a) the sound before and after the cone surface is isolated. ?) For the two purposes of
supporting role of the center retainer, edge a (as is often the case, the corrugation is attached so
that the corn paper 6 is easy to move as shown in FIG. 1). Was necessary. However, this edge a is
made of paper or cloth and may not be able to follow large amplitudes. In addition, such
distortion also occurs in large amounts. If the width of the edge is increased to prevent this,
harmful sound will be generated from this, and many peaks and valleys will be generated in the
sound pressure frequency characteristic. Thus, conventional edges have many drawbacks. The
present invention has been made to eliminate the above-mentioned disadvantages of the prior
art, and one embodiment of the present invention will be described below with the same
reference numeral as in the prior art with FIG. 3- As shown in FIG. 2, in the cone type speaker
according to the present invention, a ring 8 having a small coefficient of friction such as ethylene
tetrafluoride (hereinafter referred to as "Teflon") is attached to the outer side of the pregnancy
part of cone paper etc. Then, a ring 9 having a small coefficient of friction, such as Teflon, is
mounted on the inner side of the peripheral surface of the frame 74 opposed to the ring 8, and
the outer peripheral portion of the ring 8 is brought into contact with the ring 9. And sliding it
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with bifis, it has the functions (a) and (b) described in the conventional example. One of the
materials that make up this ring 8, 9 is Teflon, but this material is very smooth and looks like 1
wax 1 and is used as an oil-free gear bearing There is also. Thus, when the cone paper 6 is
displaced in the direction of the arrow, the mechanical loss is very small even if the rings 8 and 9
are rubbed, because the slip paper 9 is easy to slip. And it does not generate a sound by sliding in
this part. Therefore, such a structure does not impair the function as the sliding 5 "-force at all.
With such a structure, it is possible to provide great restraint in the direction 4..4 perpendicular
to the movement of the cone 6 and to realize an ideal edge in which no restriction is received in
the movement direction. Further, as materials of the rings 8 and 9, there are another
tetrafluoroethylene-67-propylene copolymer and the like. As described above, the present
invention is configured, and it is possible to flatten the sound pressure frequency characteristics
of the midrange by reducing distortion at the time of large amplitude in the bass and removing
the edge resonance, and the width of the edge is narrow. As a result, the sound pressure can be
improved with a large effective radius.
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