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JPS577282

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DESCRIPTION JPS577282
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing the
construction of an embodiment of the coaxial speaker according to the present invention, and
FIG. 2 is a cross section showing the construction of another embodiment of the coaxial speaker
according to the present invention FIG. 1 · · · · · · · · · · · · · · · · · · · · · · · · · 2 · · · cone diaphragm for
low-pitched sound, · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · pole piece 6 · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · voice coil, 10
· · · · for ribbon type high sound Diaphragm, 11 ..... Reflector.
DETAILED DESCRIPTION OF THE INVENTION In the present invention, a low-pitched sound is
reproduced from a cone-type bass diaphragm while a single magnetic circuit is used, and a highpitched sound is reproduced from a ribbon-type high-pitch diaphragm. Make a speaker Kll. A
coaxial speaker with a blue-ribbon ribbon-treble vibration (11 ′ ′ ′ ′ =, reproduced from two
plates, and a low-pitched sound from a JII moving plate for a low-pitched bass) is known from the
prior art However, in the conventional coaxial speaker, the magnetic circuit is separately installed
for bass and treble. There are drawbacks such as rounding, large shape), worn, heavy weight, and
thus hindering cost reduction. This device can eliminate the above-mentioned drawbacks of the
prior art. If one magnetic circuit is used for high-pitched and low-pitched sounds, the utilization
efficiency of the magnetic circuit can be increased by The purpose is to make it possible to
reduce the size, size and weight, and thus to provide a cost-effective & coaxial-type spave.
Hereinafter, an embodiment of the coaxial speaker according to the present invention will be
described based on the drawings. FIG. 1 is a cross-sectional view showing the structure of a
seventh embodiment. In FIG. 1, 1 is a frame, and a frame IK is attached with a cone type
diaphragm 2 for low-pitched sound through an edge 3. Also, at the bottom of the frame 1 (2), the
supporting column 4 is erected upright with 7 frames 1 in advance. One pole piece 5 is fixed to
the top of the column 4. The upper end surface of the pole piece 5 is secured to the lower surface
of the back plate 6. The plate 7 is shown in the figure, and the plate 7 is formed in a sunplate
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shape, and the above-mentioned pole piece 5 is penetrated in the central part thereof. A gap is
provided between the pole piece 5 and the plate 7. Furthermore, a magnet 8 is disposed between
the plate 7 and the back plate 6. Thus, the pole piece 51 back plate 6, the plate 7, the magnets 8
and K, 1 @ at * C + clauses are threatened. A voice coil 9 is disposed in the gap between the plate
7 and the pole piece 5, and the voice coil 9 is a base Kl! Of the cone type bass diaphragm 2. It is
fixed. The voice coil 9 is for transmitting the bass to the cone type bass diaphragm 2. (8) Before,
in the outer peripheral image of the magnet 8, between the plate 7 and the pack plate 6, the
ribbon placing treble vibration 1110 is disposed. The ribbon type high sound diaphragm 10 is
for generating high sound.
Next, the operation of the coaxial speaker of the present invention configured as described above
will be described. Assuming that the ribbon type treble diaphragm 10 is circular, the ribbon type
treble vibration I [10 is vibrated by the magnetic flux leaking from the plate 7 to the back plate 6,
but the vibration direction is the diameter direction Vibrating soot. As shown by arrows As and
At, the high sound is reflected in the front direction by the cone 低音 ° low-pitch diaphragm 2 to
reproduce the high sound. Further, the voice coil 9 is responsible for one bass, and operates in
the same manner as a general cone-type speaker to transmit vibration to the cone-type bass
diaphragm 2. Note that the voice coil 9 and ribbon-type high-pitched ones are used. It is needless
to say that the diaphragm 1 @ Kit is supplied using a network to receive (4) an appropriate
frequency band. FIG. 2 is a cross-sectional view showing another embodiment of the coaxial
speaker according to the present invention. In the case of this FIG. 2, the reflecting rod 11 is
attached to the ribbon-type high-tone diaphragm 10 in parallel with the cone-type bass
diaphragm 2 so as to face the ribbon-type high-sound diaphragm 10. This reflector 11 is v! F) to
reflect the high-pitched sound generated from the ribbon-type high-pitched diaphragm 10 to the
cone-shaped low-pitched diaphragm 2 shown in FIG. 1> in the direction of the arrow AI + A by
the reflecting plate 11. It is a book that is made to reflect forward. The other parts are the same
as in FIG. 1, and therefore the same parts as in FIG. As described above, according to the coaxial
speaker of this invention, the voice coil is disposed in the pole piece, the plate, and the O 閤 O
gap on the magnetic circuit of 1 Italy and fixed to the diaphragm for cone type bass And K (8) to
transmit the low-pitched sound to the diaphragm for cone sub-bass and arrange a diaphragm for
high-pitched sound between the plate and the pack plate outside the magnet, and the O plate to
the back plate In order to generate a high sound by driving the ribbon lid high-pitched vibration
plate by actively utilizing the remote control leaked to the O, one 0 @ air circuit can be used as a
2-way 徂 1 and the magnetic The magnetic flux O of the circuit can be used effectively. Also,
along with the above, it is possible to reduce the size and weight of the device, which can reduce
the cost and can be a coaxial 112 way speaker. It produces a wide range of excellent effects.
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