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JPS57109697

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS57109697
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a conventional
flat panel loudspeaker, FIG. 2 is a longitudinal sectional view of one embodiment of the flat panel
loudspeaker according to the present invention, and FIGS. FIG. 7 is a longitudinal sectional view
of another embodiment of the invention; DESCRIPTION OF SYMBOLS 1 ... Plate with center pole,
1a ... center pole, 2 ... ring-shaped magnet, 3 ... top plate, 4 ... voice coil, 5 ... damper [1st damper],
6 ... speaker frame, 7 ... conical drive cone, 8 ... flat diaphragm, 9 ... end (second damper), 11 ...
fixed part, 12 ° 12 ', 12 "... Damper, 13 ... pasting table, 14 ... dome-shaped annular body.
[Detailed description of the invention] The present invention relates to a dormitory plate type
speaker having a flat diaphragm in particular in the speaker Φ, and the purpose of the invention
is rolling at large amplitude and poor gas path (, power linearity is good To provide things. First,
the structure of a conventional flat panel loudspeaker is shown in FIG. 1, and this structure will
be described. Insert the gap gauge and fix the plate with center pole (11 and ring magne, soft <2)
and the top plate (3), and fix one end of the voice coil (4) and one end of the inner periphery of
the dano per (5) Are inserted into the magnetic gap (G) between the center pole (la) and the top
plate (3) by forming a spacer, and then (2) 093 、 -1 (, deg Lugo speaker Adhesively fix the other
end of the damper (5) to the frame (6). Thereafter, the conical drive cone (7) is fitted and fixed to
the upper portion of the voice coil (4), and the flat diaphragm (8) and the edge (9) are formed on
the upper surface of the drive cone (7) and the upper surface of the speaker frame (6). 1) is fixed
to the diaphragm assembly, which is formed by sticking a). 013はガスケットである。 Thus, in
the conventional flat-plate speaker, the flexural rigidity of the diaphragm (8) is high (there is no
division 1i, and the node of the first resonance is connected to the top of the voice coil (4) The
drive is transmitted to the diaphragm (8) through the conical drive cone (7), and the voice coil (4)
receives the speaker frame (6) through the damper (5) on which the annular corrugation flange
is formed. It has a two-point support mechanism with a roll-shaped edge (9) mounted on the
diaphragm (8) and between the outer periphery of the diaphragm (8) and the speaker frame (6).
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In particular, soft foam urethane, maltobrene and soft rubber are used as the material of the edge
f9 +, and the linearity with respect to the amplitude is good but the supporting force supporting
the voice coil (4) at the center of the magnetic gap IG is weak. is there. The conventional cone
type speaker also has the same support mechanism (3) 109.1 · 1 and J, C also has a low bending
rigidity of the cone itself, so the cone surface is deformed at the time of large amplitude (at the
time of large input) Tera. Even if abnormal vibration occurs in the voice coil, even the voice coil is
not M-slanted, but in the case of a flat plate type speaker, since the rigidity is i, straight line if the
supporting force is weak as mentioned above A voice coil is given its own "1", causing a gap
failure or a rolling phenomenon. Therefore, there is a point that the power linearity deteriorates.
On the other hand, 21. 1st to 4th t 4 show embodiments of the present invention, ≦, which can
avoid the above problems.
In the present invention, a fixed portion is provided on the upper portion of the center pole, and
the inner surface of the drive cone and the fixed portion are shaded through a damper on which
an annular corrugation is formed, and the diaphragm outside 1; 4o) edge and voice coil The voice
coil is supported at the center of the magnetic gap at three points of the damper at 11 ° C. of
the frame and the damper between the fixed portion and the inner peripheral surface of the drive
cone. A forest example will be described with reference to the drawings. Incidentally, since the
magnetic circuit and the speaker frame are the same as the conventional I) Z1 structure, they
have the same function as FIG. 1 (4) 0 Ub. The same symbols are attached to items and the
explanation thereof is omitted. Qa is a fixed part, one end (lla) is fixed to the sensor ball (la)
located inside the voice coil (4), and the other end (llb) extends inside the conical drive cone (7)
You (2) is a damper with an annular corrugation having a sticking type (12a) adjusted to the
angle of the inner peripheral surface of the conical drive cone (7), and in FIG. 2 actual meIJ, this
damper (2) The other end (ttb) and the inner peripheral surface of the conical drive cone (7) are
stuck in parallel with each other. Thus, in the embodiment of FIG. 2, the damper (5) between the
voice coil (4) and the speaker frame (6) and the edge (0) between the flat diaphragm (8) and the
speaker frame (6) And the damper (2) between the fixed part α1 and the conical drive cone (7),
supporting power is improved compared to the conventional case, and the rolling at the time of
large amplitude (at the time of large input), Gap defects etc. (Amplitude is linear and power
linearity is thick (improved. Also, the reinforcement effect of the drive cone in the radial direction
is obtained 5 ', the deformation and distortion are eliminated, and the displacement of the joint
drive of the diaphragm <8) is also t ((5) 1 JEJb'! The sound pressure characteristics become flat,
the distortion in the high region is reduced, and the city at the low region is also effective,
particularly the second-order reduction. The eighth factor and the implementation in FIG. 4 have
the same effect as in FIG. 2, and in FIG. 3, aJ is a sticking base and eaves a high rigidity material
such as aluminum foil etc. Formed into a v-shape and conical so that 1 °: 1 (18a) on the flat
diaphragm (8) side is perpendicular to the voice coil (4) (parallel to the vibration IM & (8)) It is
pasted on the drive cone +71 for internal use 1 ° C, and fixed to the other end (llb) of the stick
on the flat diaphragm (8) side of this sticking table On (18al, center is t1 iJ fixed =, du) A damper
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03 'that performs one annular corrugation 9
It is attached. In: tf: fP, 4r4, 04 is a dome-shaped annular body having one pasting type (14a)
fitted to the corner 1 of the I'd surface of the conical drive cone (7) at the outer peripheral
portion, the conical drive It is pasted on the inward surface of the cone (7), and W 'inside the
dome-shaped annular body QJO 1. In the vicinity of the la portion, a jq-like corrugated patch with
damper 03 // 1 identified at 1 is attached to the other end (llb) of the fixed portion a9. If it is
created in the present .delta. as described above, the flat plate type (6) 109 '/, = 7. F1. . In the tldoor, one end is fixed to a center pole located inside the voice coil, and the other end is provided
with a fixing portion extending into the inside of the conical drive ring, and the other end of the
fixing portion The conical drive cone circular phase is connected through an annular corrugation,
a damper having a ring formed thereon, the damper, a first damper between the voice coil and
the speaker frame, and $ pifi wharf 1 1 The outer circumference of this flat diaphragm and the
speaker frame about 7! With an eight-point support structure with a second damper between the
weirs, there is no rolling at the time of large amplitude, gap failure, etc., and the power linearity is
bft better than before, Because C can be done, and it can also be cheap +, '°, can be used, so it
will be of great practical value and effective for industrial production.
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