JPS57190498

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DESCRIPTION JPS57190498
1, -1 Specification 1, title of the invention
スピーカ
3. Detailed Description of the Invention The present invention relates to a speaker in which a
diaphragm and a bobbin are coupled via an elastic body and the elastic body is used as a
mechanical filter, wherein the elastic body and the diaphragm are coupled via a coupler ring. The
purpose is to obtain a reliable speaker by combining, and to make the coupler ring strong against
vibration while minimizing the weight increase. An embodiment of the present invention will be
described below with reference to FIGS. 1 to 3. In FIG. 1, 1 is an edge, 2 is a diaphragm, 3 is a
dust cap, 4 is an elastic body, 6 is a sub diaphragm, 6 is a lid for sealing the tip of the bobbin 7,
sa and sb are dampers, 9 Is a frame, 10.12 is a plate, 11 is a magnet, and 13 is a coupler ring
made of resin or the like. In this way, the movement of the bobbin 7 is transmitted to the
diaphragm 2 via the elastic body 4, so that when the bobbin 7 moves slowly (following it, the
diaphragm 2 vibrates slowly, but the bobbin 7 When moving quickly, the elastic body 4 can not
follow this movement, and the diaphragm 2 hardly vibrates. As a result, only the bass is
reproduced, and a function substantially equivalent to that obtained by adding the low pass filter
is obtained. FIG. 1 is particularly surrounded by the dust cap 3, the elastic member 4, the
auxiliary diaphragm 5, the lid 6, and the bobbin 7 and EndPage: operates as a kind of mechanical
filter by performing the above-mentioned function It has been realized. If the sealed space is used
in this manner, the compliance does not relate to the fatigue of the elastic body 4, and as a result,
even if the elastic body 4 may be "slumped" during long-term use, the reproduction frequency
band The excellent effect is that there is nothing to change. The coupler ring 13 is used to stably
couple the diaphragm 2, the dust cap 3, the elastic member 4 and the damper 8b for preventing
rolling (rotational phenomenon), as shown in FIGS. As shown in the figure, an elastic body
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holding surface 14 extending over the entire inner circumference, an annular rib 15 projecting
parallel to the inner circumference of the coupler ring 13 on the lower surface of the elastic body
holding surface 14, and the annular A plurality of radial ribs 16 radially provided between the rib
16 and the inner periphery of the coupler ring 13 are integrally formed of resin. When the
coupler ring 13 having such a structure is used, it is possible to make it as lightweight as possible
and to significantly increase the strength against vibration. As shown in FIG. 4 (IL) and (b), an
elastic body holding surface 18 is provided on the entire inner circumference of the coupler ring
17, and the space between the lower surface thereof and the inner peripheral surface of the
coupler ring 17 is made of resin. When it is filled up, the strength is increased but the weight is
also greatly increased, which causes a problem that the efficiency of the speaker is lowered.
On the other hand, as shown in FIGS. 6 (a) and 6 (b), the elastic body holding surface 20 is
provided on the entire inner periphery of the coupler ring 19, and a plurality of triangular
reinforcements are provided between the lower surface thereof and the inner periphery of the
coupler ring 19. It is also conceivable to provide the ribs 21. In this configuration, the weight
does not increase so much, but in this configuration, when the holding surface 2o vibrates
violently due to the vibration of the elastic body, the rib 21 is buckled, and the bending of the
holding surface 2o occurs (FIG. In the part indicated by C) in IL)), it was pressed that the fracture
occurred. When annular ribs 16 and radial ribs 16 are provided on the lower surface of the
elastic body holding surface 14 as shown in FIGS. 1 to 3 in Soko, the circle of the annular ribs 17
against the vertical vibration of the elastic body The coupler ring 13 and these ribs 15 and 164
form a hollow structure such as an H-shaped steel, since the circumferential extension acts as a
drag force and the radial direction is connected by the radial ribs 16 and reinforced between
them. Thus, the vibration of the elastic body holding surface 14 in the vertical direction (the
direction of the arrow in FIG. 2) can be greatly damped. In addition, the coupler ring 13 is liable
to generate radial vibration (direction of arrow B in FIG. 3) due to the directionality of the
material, but also with respect to this vibration, it is constituted by the annular rib 16 As the
hollow structure generates drag, even vibration in this direction can provide sufficient damping.
Of course, the addition of a thin annular rib 16 and a radial rib 16 to the coupler ring 13 is
sufficient, so that the increase in weight is small (it can be reduced). As described above,
according to the present invention, it is possible to realize a bumpy, high-performance speaker
having a structure resistant to vibration while minimizing the weight increase.
4. Brief description of the drawings FIG. 1 is a cross-sectional view of an embodiment of the
present invention, and FIG. 3 is a sectional view and a bottom view of the above embodiment,
FIG. 4 (SL) and (b) are a sectional view and a bottom view of a conventional example, and FIG. 5
(IL) and (b) are other conventional examples. It is sectional drawing and a bottom view. 1 ......
edge, 2 ...... diaphragm, 3 ...... dust cover, 4 ...... elastic body 5 ...... secondary vibration plate, 6 · · · ·
Lid 7 ··········································· Damper, 9 ········· Frame, 10.12 ··························
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· · · · · · · · · · · · · · · · · · · · · Coupler ring, 14 · · · · · · elastic body holding surface, 16 · · · annular rib,
16 · · · · · radial rib . Name of agent Attorney Nakao et al. 1 person EndPage: 2 Fig. 1 @ 4 Fig. 8
Fig. 5 End Page: 3
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