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DESCRIPTION JPS57148993

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DESCRIPTION JPS57148993
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a central longitudinal sectional side view
showing an example of a horn speaker according to the present invention, and FIGS. 2 and 3
respectively illustrate different connection procedures for a disc-shaped yoke of a center pole.
FIG. DESCRIPTION OF SYMBOLS 1 ... Water plate, 2 ... post | mailbox, 3 ... Support cylinder, 4 ...
External horn, 5 ... Bolt, 6 ... Natto, 7 ... Intermediate horn, 8 ... Internal horn, 9: Support plate, 10:
Annular yoke, 11: Permanent magnet, 12: Disc-like yoke, 12a: Female screw hole, 13: Center
pole, 13a. иииииииииииииииииииииииииииииииииииииииииииииииииииии Dia. Agent, 33: Center hole, 34: Hole, 35: Connector, 35a:
Male thread, a: Gap.
DETAILED DESCRIPTION OF THE INVENTION Loudspeakers used for ship sirens etc. are desired
to have as large an audio output as possible. That's why, because of the speaker, a powerful
permanent magnet. As a one-on-one type, a device in which a large sound current is allowed to
flow to the movable coil is usually used at the same time as increasing the sound conversion
efficiency. However, the movable coil is usually located in a very bad gap between the center pole
integrated with the yoke and the permanent magnet or the annular yoke that supports it in order
to obtain a strong magnetic field. Heat dissipation at the time is bad. Therefore, the temperature
of the center pole may rise remarkably to reach 130 ░ C. or more due to the heat generated by
the induction current of the movable coil oscillating back and forth and the heat of the movable
coil due to the heat. Thus, when the temperature of the center pole rises, the magnetic force
decreases and the momentum of the movable coil decreases, so the rate of conversion to
momentum (3) ie0 energy in the supplied electric energy decreases. . Therefore, the heat
generation of the movable wire increases, and when the speaker is over-inputted or continuously
used for a long time, the movable wire may be disconnected. In the present invention, the
temperature rise of the movable coil is reduced by suppressing the heat generation of the center
pole, and a larger output can be obtained with a horn speaker of the same size as the
conventional one, or an output of the same size as the conventional one. The present invention
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relates to a horn speaker that can be made extremely compact in size, and will be specifically
described below with reference to the attached drawings. In FIG. 1, an appropriate number of
horn mounting posts (2) facing forward are provided on the front surface of the annular
substrate (1), and the inner peripheral edge of the substrate 10 is directed forward. A funnelshaped horn mounting sleeve (3) whose diameter is gradually reduced is arranged in a row. A
base of an external horn (4) whose diameter is gradually increased toward the front is fixed to
the outer peripheral edge of the substrate (1), and the 0 post (2) is fixed with bolts (5) and nuts
(6). As the diameter is gradually reduced toward the end, the opening edge of the rear end of the
intermediate horn (7) whose front end is closed is fixed together with the spacer 1i 46. The rear
end of the substantially straight cylindrical internal horn (8) is fixed to the front end of the
support cylinder (3). ?? On the rear surface of the substrate (1), an annular holding plate (9),
an annular yoke (i11 a permanent magnet ?? of an appropriate number, and a disk-like yoke
(one is overlapped and fixed on the front and rear sides of the ridge 9). At the center of the front
face of the disk-shaped yoke ?, a cylindrical center pole 0 floor is provided protruding with an
annular yoke (the inner peripheral edge of the ring 101) with a setting gap (a).
The center ball 0 is made of a non-conductive and magnetically conductive material such as
ferrite or ceramic, and a male screw (13a) engraved on the outer surface of the rear end portion
is attached to the yoke ?2 It is fixed to the yoke 02 by screwing into a screw hole (12a) for
drilling. The center ball (the rear end portion of the center ball C'3 is fitted with a hole at the
yoke side without threading at the rear end portion 131, or as shown in FIG. The adhesive e41
may be fixed to the front central portion of the yo (5) 1) '47'-0- 02 with an adhesive e41.
Between the central part rear surface of the support cylinder (3) and the front surface of the
center pole ? ??, a hemispherical diaphragm 0 which is open on the rear surface is disposed,
and the diaphragm I is held between the substrate Fjl The outer peripheral edge is supported by
an annular damper ? which is held between the plate (9) and the plate (9). The bobbins a7
connected in series from the rear end of the diaphragm Q41 protrude into the gap (a), and the
movable coil a? is wound around the outer peripheral surface thereof. An equalizer 08 is
disposed in front of the diaphragm I with a slight gap. The horn speaker according to the present
invention of the above configuration is manufactured with a material having magnetic
conductivity, as well as non-conductive center pole a country, so even if the movable wire ring
07) vibrates back and forth by voice current There are no eight eddy currents in front of the
center pole 03. Therefore, compared to the conventional one, the heat generation of the center
pole 0 country is significantly less than that of the conventional one, and the movable coil 0? is
kept at a relatively low temperature, and the voice current (6), 11 = 48p, is larger than that of the
conventional speaker. It can be used at high power by flowing into the ring ?D. As described
above, according to the present invention, despite its simple configuration, it can be used to
continuously generate large audio output, so it can be used as a ship siren or the like. It is
effective, and the same voice output as the conventional one can be miniaturized and provided.
FIG. 3 shows another embodiment of the present invention, which is a cylindrical connector
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made of hard metal in an axial hole 6a drilled from the rear face of a center pole made of the
same material as described above. (G), and insert a screw (35a) in the projection from the rear
face of the center pole of the connector 09, and attach this h-screw (35a) to the yoke (12+). It is
screwed into the screw hole (12a).
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