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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a conventional speaker, FIG.
2 is a plan view thereof, and FIG. 3 is a bottom view thereof. FIG. 4 is a bottom view of the
present invention, and FIG. 5 is a cross-sectional view of the present invention. DESCRIPTION OF
SYMBOLS 1 ... York ¦ yoke 2, 2 ... Magnet, 3 ... Frame, 4 ... Patkin, 5 ... Diaphragm, 6 ... Voice coil,
6 '... Voice coil lead wire, 7 ... · · Plate, 8 · · · lead wire, 9 · · · adhesive, 10. 10 '· · · terminal, 11 · · ·
back pressure hole.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a headphone speaker. In a conventional headphone speaker, a copper wire is used for the
voice coil, a tinsel wire is connected to the voice coil as a lead wire, and the lead wire is further
connected to the terminal. However, in such a structure, many steps are required, and the wire
diameter of the voice coil is generally small, so it is broken and 1) 1 3 t 2) easy to manufacture.
Moreover, in the conventional speaker of the type which pulls out a lead wire to the outer side of
the ita coil, in order to fix a lead wire and in order to increase bending-proof strength, it stuck
with the adhesive agent etc. to the diaphragm plate. For this reason, the balance of the mass
balance and the hardness of the diaphragm is lost, and rolling occurs during operation of the
speaker, which adversely affects the acoustic characteristics of the speaker. And this correction
was very difficult. Furthermore, in this type of speaker, since the terminal is attached to the rear
surface frame of the ENO portion, the diaphragm back pressure can not be extracted from this
portion, and the back pressure holes can not be provided symmetrically. As a result, the sound
pressure did not go to average, and the vibration of the diaphragm was not uniform. So, in this
invention, the above-mentioned fault is solved and it aims at obtaining the speaker for
headphones which made lead wires, such as a tinsel wire, unnecessary, and was excellent in the
acoustic characteristic of a diaphragm. Next, to explain according to the drawings, FIG. 1 to FIG. 3
(2) (0Q3) show f) for a conventional tou, nubica for dophone. FIG. 1 shows a cross-sectional view
of a conventional nupeca, which comprises a diaphragm 5 supported vibratably to a frame 2 and
a frame 3 by means of a frame 4 and a vibration plate 5 which are fixed in the yoke 1 and the
vibration plate The dog coil 6 is vertically held on the plate 5 so that the gap between the yoke 1
and the plate 7 fixed to the head of the magnet 2 can be vertically oscillated. Further, a lead wire
8 for relaying the dog coil 6 and the terminal 10 is adhered to the diaphragm 5 with an adhesive
9. In the conventional nupeca having such a configuration, as shown in FIG. 3, the back pressure
holes 11 can not be provided symmetrically. Therefore, in the present invention, as shown in
FIGS. 4 and 5, holes 1a, 2a and 7a are formed at the centers of the yoke 1, the magnet 2 and the
plate 7, respectively, and the dog coil 6 is extended. 1 'line 6'i is drawn from the holes 1a, 2a, 7a
and connected to the terminal 10'. This is because the bending resistance is increased by using
an alloy wire containing silver, tin, zinc or the like instead of the conventional copper wire as the
material of the chair coil, (3) 004 superior) radius Did you use conventional copper wire?
The relay lead wire using a tinsel wire etc. required for the chair coil becomes unnecessary, and
the chair coil 6 can be directly connected to the terminal 10 '. Further, as shown in FIG. 4G, the
back pressure hole 11 is uniformly bored around the periphery. The terminal 10 ′ is provided
on the back surface of the yaw 1. The headphone nupika of the present invention configured as
described above has the following advantages. 1) Since it is not necessary to stick the lead wire
to the edge portion of the diaphragm 5 as in the prior art, occurrence of rolling due to uneven
distribution of the mass of the diaphragm 5 W1 Can. In addition, it is possible to prevent the
deterioration of the imaging dynamic characteristic due to the non-uniformity of the hardness of
the diaphragm 5 by sticking the lead wire. 2) Further, since the voice coil lead wire 6 'is not
subjected to an excessive force as in the case of being attached to the diaphragm 5, the failure
due to the disconnection is also reduced. Furthermore, it is not necessary to use a special thread
such as a tinsel thread as in the conventional case, and the voice coil winding is extended as it is,
(4) 005 堕,:! 7 can be used as a lead wire. Therefore, it is possible to obtain a reliable speaker
with few disconnections. 3) The back pressure hole of the speaker is also conventionally
unevenly distributed due to the presence of the terminal 10 as shown in FIG. 3 and six are
uniformly provided in the present invention as shown in FIG. Thus, the back pressure of the
speaker can be extracted uniformly, and the acoustic characteristics can be improved. 4) Further,
since the speaker becomes axially symmetrical, it is most suitable as a speaker for dophones,
which can be downsized.