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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural explanatory view showing a
conventional electrostatic electro-acoustic transducer, and FIG. 2 is a side view showing a state of
use of a contact device according to the present invention. . 1 ······· Vibration unit, 2 ······ Vibrator,
3, 3 ′ · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ... Plug, 6a · · · · · · · · · Front surface, 7.7 ′ · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · cords.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to a
contact device for applying static electricity and signal voltage and polarization voltage to an
electrostatic quantity electroacoustic transducer such as a 14 beaker, a headphone, a
microphone, etc. As shown in FIG. 1, in the electrostatic electroacoustic transducer, as shown in
FIG. 1, two perforated back electrodes B1 and B2 are equidistantly spaced through an insulator
Ct with one diaphragm A as a center. In order to apply the signal voltage D to the two back
electrodes (1) and B2, and to apply the polarization voltage E for bias to the diaphragm A, the
two back electrodes (1) are arranged. In the prior art, since the lead wire t was soldered to the
expansion plate A and the back electrode B1.82, the thermal adverse effect on the electroacoustic
transducer which is a precision part, that is, the thermal deformation of the component, the
solder iron Pressure, mechanical pressure by handling pressure, etc. may cause adverse effects.
Deviation is not negligible for this type of electro-acoustic transducer where performance is
greatly affected. Therefore, the present invention solves the above-mentioned disadvantage 8.
The signal voltage and the polarization voltage are not supplied to the perturbed temporary back
electrode by soldering of the lead wire, and the electrical contact structure is totally new from the
viewpoint. Take by configuring as a plug to the code side! (ii) Simplification of handling, removal
of adverse thermal or mechanical effects to improve reliability, and electrostatic voltage type
power supply circuit groove Ct for simplification, downsizing, weight reduction, etc. It is an object
of the present invention to provide a contact device for an acoustic transducer. 2 will be
described in detail based on the drawings of the present invention t-embodiment, and FIG. 2 is a
side view of a partial cutting showing the use condition of the contact device according to the
present invention, in which 1 is a bias type. In the vibration unit, the unit 1) has a structure in
which a plurality of holes 3a + 3a = 2 and two load electrodes a, fl and an insulation support 4
are provided equidistantly with the diaphragm 2 at the center. The diaphragm 2 may be
sandwiched between the conductors 5 in the insulating support 4 and slightly protruded from
the outer peripheral surface of the insulating support 40 by a plug 06 which may be entirely
formed of an insulating material. However, at least the front surface 6a of the plug 6 is an
insulating material, and a cavity is formed inside, so that on the front surface 6a of the plug 6,
each of the load electrodes 3 from the both sides Protruding insulator plate 7.1 made of
phosphor bronze etc. with contact In addition, in the middle of the two terminal plates 7.7 ', the
coil spring-like terminal 8 made of a conductor is protruded. The terminal 8 and the terminal 8
are connected to the cord 9 by soldering (at 311, the signal voltage and the polarization voltage
are applied to the other end of the cord 9).
In the figure, '+ lL' + b each indicate a contact. Therefore, when the plug 6 is inserted from the
lateral direction of the vibration unit 1, the two terminal plates 7. f is in electrical contact so as to
sandwich two back electrodes 39 by contact & + & at the same time, and the coil spring terminal
8 is in electrical contact by being in contact with one conductor 5; The signal voltage is applied
to the diaphragm 2 and the polarization voltage is applied to the diaphragm 2 respectively. The
contact device of the present invention can also be applied to electret type electrostatic
electroacoustic transducers. 0 The present invention has two back electrodes, as on paper. In the
electrostatic electroacoustic transducer provided in a pair on the diaphragm 2 via the insulating
supporter 4 in the middle of z, the above-mentioned back electrodes 3. 3 from the both sides of
the front face 6 a of the plug 6. A terminal plate 7.1 protruding to contact with the spring with a
spring property, and a coil spring-like terminal 8 protruding from the center to contact the upper
fine movement plate 2, this terminal plate 7.1 And the electron 8 and the cord 9 are connected
within the t plug 4 6 6. Therefore, the one-time energization of the vibration unit 1 consisting of
the diaphragm 2, the back electrode 3.3 ′ and the insulation supporter 4 is performed. Since the
vibration unit 1 is not soldered, there is no adverse thermal and mechanical adverse effect on the
unit 1. Further, since the insulator plate 7 ° τ, the terminal 8 and the cord 9 are pneumatically
connected in the plug 6, the reliability is high and the handling is easy. Furthermore, since the
plug 6 is inserted from the thin lateral direction to the vibrating unit 1 to be energized, the
thickness does not increase, and it becomes possible to make it thinner and smaller. Moreover,
since the vibration unit 1 can be separated from the plug 6, it has the advantage of being easy to