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JPS5248831

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DESCRIPTION JPS5248831
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional side view of a Sbica using a
flat diaphragm according to the present invention, FIG. 2 is a perspective view of a bias material,
and FIGS. 3A and 3B are characteristic diagrams of the bias material and It is explanatory
drawing which shows a suppression state. Reference Signs List 1 flat diaphragm, 2 thread, 3
support ring, 4 yoke, 5 bias material, 6 pole piece. Fig. 1 Fig. 2-207-Japanese Utility Model
Application Publication No. 52-48831 (2) Fig. 3 [AI [8] 3, IIF (dyn) to 7 20-208-
DETAILED DESCRIPTION OF THE INVENTION This invention is intended to be applied to the
improvement of a speaker using an endless type, especially a thread suspension type (according
to a plane diaphragm). A speaker using a conventional flat diaphragm can prevent the uniform
movement of the diaphragm or the partial parasitic due to the non-Il'l linearity of the air in the
air chamber formed between the diaphragm and the 7F ruby. The conventional method used to
remove this defect is to make a hole in the voice coil bobbin and take out the air between the
diaphragm and the pole piece. There is a structure that escapes. However, while such a
conventional method lowers the strength of the Heuskoh (yL bobbin, in the Elanless type
speaker, there is a risk that the air that has escaped to the forward side of the diaphragm may
significantly deteriorate the sound pressure characteristics. In order to solve the conventional
drawbacks as described above, this invention has a uniform thickness and a constant density
between the plane diaphragm and the pole piece, and a stretchable urethane foam or fibrous
material such as glass cool. To obtain a speaker characterized in that Beisston Moron of the plane
diaphragm is made more linear (and becomes exercise) by interposing it as a material such as
rubber or 1 ≦ Ias. Purpose. In the following, an embodiment of the present invention will be
described with reference to the drawings. 1 is a sheet made of a sheet of paper, a polyester film,
a toe,... It is done. 2 is a thread for suspending the flat diaphragm 1, and a thread having elasticity
and elasticity such as nylon or tetron tex is used. Before this yarn 2 is fixed to the support ring 3,
a tension of, for example, 50 to 105 dyn is applied. Thus, the flat diaphragm 1 suspended from
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the support ring 3 by the & CC 20 is centered on the yoke 4 and assembled as a speaker.
Reference numeral 5 is a stretchable urethane foam having a uniform thickness and constant
density, or a bias material made of a fiber-like material such as glass cool or a rubber-like
material. To intervene. The bias material 5 of such a material generally has the characteristics as
shown in FIG. 3. For example, when a planar force F (dyn) is applied to the π-cylindrical bias
member 5 so as to be small as shown in FIG. 3, the thickness t becomes smaller in proportion to
the force up to the thickness 1 □. (・ (When applying tension to the yarn 2 using the principle of
(1), applying force f, until the via tap material 5 is in the shape of thickness 1, 1 Up to 12, the
piston 7 can be moved in a linear motion relative to the driving force applied to the whistle coil.
Therefore, appropriate amplitude characteristics and frequency response can be obtained by
appropriately selecting and using the density of the bias member 5 and the stretchability. In this
device, a sheet material is interposed between the flat diaphragm and the hole piece, and the
tension material applied to the hanging thread of the flat diaphragm is used to appropriately
push the bias material by π. Thus, it is possible to make the bixton moon of the one-to-one
diaphragm more linear, and further to absorb small odd imaging motion generated at the flat
portion of the planar diaphragm. In addition, there will be a feature that appropriate amplitude
characteristics and frequency response can be obtained by selecting the material of the human
resources for vias-density, elasticity, etc.
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