JPS5494232

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DESCRIPTION JPS5494232
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are top views of diaphragms used in
planar drive type electroacoustic transducers, and FIGS. 6 is a cross-sectional view showing an
embodiment of the electroacoustic transducer of the present invention, FIG. 7 is an exploded
perspective view of the main part, and FIG. 8 is a cross-sectional view of the main part FIGS. 9A
and 9B are explanatory views of a bayonet part. 3 · · · · · · · Terminal part, 10. 11 · · · · · · · · · · · · · · · ·
· plate-like Magneat, 15 · · · · · · · · · · · · · · · rivet 17 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · elastic Body, 22 ······· Disk portion, 23 · · · · · · ·
························································································
· · · · body · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · body · · · · · · · · · · · · · · · · · · · · body · · · · · · · · · · · · · · · ·
body · · · · · · · · · · · · · · · · body, 22 · · · · · · · · · · ...
The present invention relates to an electroacoustic transducer in which the feeding structure is
improved to simplify assembly and confectionery and maintain stable quality. The diaphragm of
the recent flat drive type electroacoustic transducer; C41 is configured as shown in FIG. 1 and
FIG. Ｆｌいる。 That is, a voice coil 2 of a predetermined pattern is formed by a method such as
photo etching on gold mW laminated by adhesion or distillation on a diaphragm substrate 1
made of a film of polyester, polyimide or the like with a thickness of several μs to several tens of
μm. It is configured. In addition, a terminal portion 3 having a larger area than the voice coil 2 is
provided as an external feed 'A' and used as an all connection terminal. In FIG. 1, the terminal
portion 3 is provided at the center and the peripheral portion of the diaphragm substrate 1, and
in FIG. 2, the terminal portion 3 is formed at the peripheral portion. A conventional
electroacoustic transducer using such a diaphragm will be described with reference to FIGS. First,
the one shown in FIG. 3 resiliently press-fits the spring member 7 coupled to the case 4 by the
screw 6 to the terminal portion 3 of the diaphragm 6 as described above held by the two cases 4.
It is made to feed and let it do. J) In this configuration, the spring material 7 needs to use metal
made of the same material as the diaphragm 63, the voice coil 2 of the -port and the terminal
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portion 3. This is for the prevention of electric corrosion applied to the contact point, but 4j! ! In
the case of using an aluminum metal foil that is effective to measure the improvement of the
sonotropy characteristics by using it, it can not be used as the spring material 7, and it becomes
difficult to select an appropriate material and to perform surface treatment. Further, FIG. 4 shows
an electric supply concentrated acid to the terminal portion 3 provided at the center of the
diaphragm shown in FIG. The terminal portion 3 of the diaphragm 6 is held by a rivet 8 formed
of a metal of the same material as the foil to obtain conduction. In the case of this configuration,
there is a risk that the contact surface is difficult to be uniform and uniform even at one o'clock
because the state of pressing is metal to metal. 6 shows a configuration in which power is
supplied to the terminal portion of the peripheral portion, and the external lead terminal 9) is
disposed on the terminal portion 3 of the diaphragm 6 held between the housings 4, The outer
periphery of the metal ring 91 is enclosed by a metal ring 91, which is composed of 47,.
According to this configuration, since the terminal portion 3 is pressed by the hard external lead
terminal 9, the contact surface is unstable, and as a result, the reliability in the pneumatic
connection is poor.
For this reason, it is necessary to solder the terminal portion 3 and the external lead terminal 9,
and it is therefore necessary to use an identifiable metal foil and the external connection terminal
9, and aluminum and the like can not be used. You will receive Thus, the conventional nausea
acoustic transducers each have n drawbacks and have not been fully satisfactory. The present
invention eliminates the above-mentioned conventional drawbacks. Hereinafter, an embodiment
of the present invention will be described with reference to FIGS. 10.11 is a frame-like housing
holding a flat magnet 12 provided with a large number of sound emission holes in the center,
and this housing 10.11 is tightened with a screw 13 and a nut 14 at several places of the
peripheral part. This is connected between the C-port housing 10.11. The @ -moving plate 16
shown in FIG. A rivet 16 made of aluminum of the same material as the metal foil of the
diaphragm 16 is coupled to a portion corresponding to the terminal portion 3 & 'c of the
diaphragm 15 of the housing 11 disposed on the lower side. The lower end is connected to an
external lead-out terminal 17 which can be soldered. １え、よ、１． Yu 0, 1. , Sue. A hole 18 is
formed in a portion corresponding to the portion 7- and a) 41): J-hole portion 41. The upper end
of the through-hole 18 is a shape that passes through the center of the through-hole 18 A long
hole 19 is formed, and a broken locking portion 20 is formed in the lower part by a crystal that is
continuous with the long hole 19. That is, the long hole 19 and the locking portion 20 constitute
a bayonet. An elastic material 21 such as a foam material such as urethane foam, neovinyl
rubber, silicone rubber, butyl rubber, etc. is inserted into the through hole 18, and a projecting
piece is formed on the opposing circumferential portion of the disc portion 22 on the elastic
body 21. A presser plate 24 is disposed with a protrusion 23-1 and -1 projected, the presser
plate 24 is fitted into the long hole 19 with the projection 23 fitted, and the presser plate 24 is
pressed into the through hole 18. Then, the pressure plate 24 is rotated to fit the protrusion 23
to the retaining portion 2o, and the first elastic body 21 is pressed and deformed to be in
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pressure contact with the back surface of the terminal portion 3 of the diaphragm 15. The
terminal portion 3 is uniformly pressed against the rivet 16 to ensure the morbid conductivity.
As described above, since the electroacoustic transducer according to the present invention is
configured, the contact between the terminal portion of the transmission plate and the vent
becomes reliable and stable, and the voice coil formed on the diaphragm and the metal of the
terminal portion It is also possible to use sacrificial aluminum as a foil, and it is possible to use
aluminum as a rebate, and there is no restriction on these materials, and furthermore, since an
elastic body is used, it is possible to use an external body. The vibrational force from the material
is absorbed, and furthermore, the surrounding corrosive atmosphere, moisture and other adverse
effects on the contact area can be cut off to provide a reliable one, which is of practical value) It
is big.
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