JPS61208396

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DESCRIPTION JPS61208396
[0001]
FIELD OF THE INVENTION The present invention relates to coaxial speakers. Conventional
Technology A conventional coaxial speaker has a structure as shown in FIG. An annular
diaphragm 1 has an inner edge 2 and an outer edge 6 attached thereto. The inner peripheral
edge 2 is fixed to the inner peripheral edge fixing frame 4 fixed on the woofer field section 8. The
tweeter 6 is removably accommodated on the inner peripheral side edge fixing frame 4 by a
tweeter fixing screw 12 so as to be removable from the front. By the way, the inner periphery of
the arrow sheet 3 attached to the back surface of the inner peripheral edge 2 is positioned and
fixed by the inner peripheral edge fixing frame 4. Problems to be solved by the invention
However, in the case of such a structure, it is not the space fool of the arrow 3 for fixing it to the
inner side of the inner peripheral edge 2, and the positioning of the arrow 3 is further
determined. A space is required for the inner peripheral projection of the frame 4 for fixing the
inner peripheral side in order to make a crease. As a result, the inner diameter of the ring-shaped
diaphragm 1 becomes large, the area of the diaphragm becomes small, sufficient efficiency can
not be obtained, and the directivity also deteriorates. Alternatively, when trying to reduce the
inner diameter of the ring-shaped diaphragm 1, the magnet of the tweeter 6 has to be
miniaturized, and there is also a problem that the tweeter can not obtain sufficient efficiency.
Therefore, in view of the above problems, the present invention makes it possible to reduce the
inner diameter of the ring-shaped diaphragm or to increase the size of the tweeter magnet by
reducing the space for positioning and fixing the inner edge of the inner peripheral edge. It is an
object of the present invention to provide a coaxial speaker capable of achieving sufficient
efficiency. Means for Solving the Problem The means of the present invention for solving the
above problem is to position the outer periphery of the arrow pasted on the back surface of the
above-mentioned inner edge by the frame for fixing the inner edge. It is. Operation According to
the present invention, with the above-described configuration, the inner peripheral projection of
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the inner peripheral edge fixing frame for positioning the inner peripheral edge can be
eliminated, and the space between the arrow and the tweeter can be fitted. As a result, the inner
diameter of the ring-shaped diaphragm can be reduced, or the magnet of the tweeter can be
enlarged. Embodiment 11 An embodiment of the present invention will be described with
reference to the attached drawings. In FIG. 2, reference numeral 13 denotes a ring-shaped
diaphragm, to which an inner edge 14 and an outer edge 18 are attached. An arrow 15 is
attached to the back surface of the inner peripheral edge 14, and the outer periphery of the
arrow 14 is positioned by the inner peripheral edge fixing frame 16 and fixed to the outer
peripheral edge.
An inner edge fixing frame 16 is fixed on the woofer field portion 20, and the tweeter 17 is
detachably accommodated from the front by a tweeter fixing screw 24. Next, the operation in the
configuration of this embodiment will be described. The arrow 14 attached to the back of the
inner edge 13 is positioned by the inner edge fixing frame 15 at the outer periphery, so that the
arrow 14 and the tweeter 16 can be fitted. As a result, the inner diameter of the ring-shaped
diaphragm 12 can be reduced, the diaphragm area is increased, sufficient efficiency can be
obtained, and the directivity is also improved. Alternatively, the magnet of the tweeter 16 can be
increased in size and sufficient efficiency can be obtained. In the above embodiment, the tweeter
17 is used, but it is a matter of course that this may be a Mitsudrange speaker or the like.
Further, although the ring-shaped diaphragm 13 is a flat plate, it may be a cone, a dome or the
like. As described above, according to the present invention, the outer periphery of the arrow
sheet attached to the back surface of the inner peripheral edge of the ring-shaped diaphragm is
positioned by the inner peripheral edge fixing frame, and as a result, the inner peripheral edge is
fixed. The inner circumferential projection of the inner circumferential edge fixing frame for
positioning the lateral edge can be eliminated, and the space between the arrow and the tweeter
can be fitted. As a result, the inner diameter of the ring-shaped diaphragm can be reduced, the
diaphragm area can be increased, sufficient efficiency can be obtained, and the directivity can be
improved. Alternatively, since the tweeter magnet can be enlarged, the tweeter can also be
provided with sufficient efficiency.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is an enlarged cross-sectional view of an essential part of a coaxial speaker according to an
embodiment of the present invention, FIG. 2 is a cross-sectional view of the coaxial speaker, and
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FIG. 3 is a cross-sectional view showing a conventional coaxial speaker.
13 ······ Ring diaphragm, 14
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Ring diaphragm, 14 ······································-Frame for fixing the inner circumference side, 17・ ・ ・
・ ・ ・ Tweeter. . Name of Agent Attorney Nakao Toshio and 1 other person Figure 1-Axis Lin 7
Dog J111 and 4-1 μTff! [Pueb 5 f---natural grade 1 B-one for external use 14 W 'J x-, di 20-to
the area 1 peak 2 m-) L-m Figure 3 f-1-link D image 5a motion & 2- -Intra-M M 倶 11 edging 3--ITar-S-M, 4---For internal use Jl lodge 11 Projecting frame J-One-piece i-gG--One-peripheral runup fg
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