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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
regular polyhedral speaker system, and FIG. 2 is a cross-sectional view of a speaker of the
present invention. 1 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и center pole иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
DETAILED DESCRIPTION OF THE INVENTION The present invention is in the form of a
loudspeaker for use with a regular dodecahedral loudspeaker / stem. , 71. The conventional
dodecahedron-shaped speaker / stem, as shown in FIG. 6 (1), forms a frame 12 of a right twelvehundred-piece form, and a circular speaker is attached to the frame of this frame S'7 '. Means are
used. In this framework, a speaker is attached, and a thick frame material is used in order to
withstand an impact generated during transportation or the like. When a thick frame is used, the
space for attaching the speaker is narrowed, and hence the sound radiation surface is reduced to
reduce the electroacoustic conversion efficiency. This device: C. The conventionally known
regular dodecahedron-shaped speaker / stem is made for the purpose of improving the break.
With regard to the shape of the speaker, as shown in FIG. 2, the truncated five-pyramidal speaker
of this invention relates to the shape of the speaker. The outer shape of a chiseled pentagonal
pyramid whose outer bottom surface is the outer bottom surface with five triangles of 5 whose
sides have a length of a (1 + v??T) V?T / 4? respectively. A field section comprising a macnet
2, a center pole 3, a ring type plate 4 and the like is fixed in a cage 1 having a yoke 1, and the
diaphragm 5, voice coil 6, and The loudspeaker with the truncated pentagonal pyramid
configured as described above is sequentially assembled on the outer periphery of the yoke when
assembled into a regular dodecahedron shaped speaker / stem. It is fixed by the side and the
outer side, and a total of 12 docks 5 Once secured or all of the outer peripheral sides of the
conical loudspeaker the dodecahedron shaped speaker system. In order to fix the outer periphery
filU to the outer peripheral screen, it is sufficient to use an adhesive such as a domed comb
system having a relatively large bonding area, and for each truncated pentagonal speaker, 5 of
each outer periphery The two sides are glued together to form a solid icosahedron shaped
speaker / stem as a whole. The dodecahedral speaker / stem assembled in this manner does not
require a framework as described in the prior art, and the sound radiation surface can be
broadened to achieve a good electroacoustic conversion efficiency.
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