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JPS4830627

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DESCRIPTION JPS4830627
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a soundboard, FIGS. 2 and 3 are
perspective views of a conventional short piece, and FIG. 4 is a perspective view of a first
embodiment of the present invention, FIG. 6 is a perspective view of the second embodiment of
the present invention, FIG. 7 is an exploded perspective view, and FIG. 8 is a characteristic curve
diagram. 3 ... piece legs, 4 ... middle plate, 5 ... short piece main body, 7, 8.9 ... Fig. 1 Fig. 2-57
actual opening 48-30627 (2) third Fig. 5 Fig. 6 Fig. 7 to Fig. 8 Fig. 7 ↑-58-
[Detailed description of the invention] The present invention relates to a piano short piece, and
its co-supporting frequency is increased to effectively transmit a string vibration in a low
frequency range to a single plate, thus the volume. The purpose is to increase and uniformly
correct the volume between the strings and to improve the timbre. Figure 1 shows the
soundboard of an upright piano, a two-in-one board, and l 'a short' piece for a bass string. The
strings of the piano are generally stretched in such a way that one low-pitched string and a
middle high-pitched string cross at the center in order to increase the string length. The lowpitched string is attached to the edge of the Kll board 2 so that it can take a sufficiently long
string, and the low-pitched string is a middle high-pitched string Each short piece is designed to
be sufficiently thick so that it can cross without touching it. Fang 2 shows furnace 1 and is a
figured foot, a bale is a middle plate, and 5 is a short piece main body. Since the thickness of the
short piece 1 # -1 is large, it is difficult to sufficiently transmit the low frequency vibration of the
bass string to the soundboard because the resonance frequency WIf itself is low. The correction
between the strings is not negative, but it has a drawback that it is difficult to make the sound
spread, the power of the sound, and the richness enough to be six. Therefore, in order to
eliminate this shortcoming, the one shown in Figure 5 has been devised. In this example, the
narrow groove 6 is provided by cutting the middle & 4 and cutting into the short block main
body. In this way, the resonant frequency can be increased, but I! Fiber III in the direction of the
grain of IIIII5, middle plate 4 and short frame main body 5! Since I is cut by the narrow groove 6,
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the vibration transmitted from the string is cut in the direction of AQ + n-n-halo 1 ^ -grain
direction, making it difficult to make lII & 2 health without loss of rat's vibration The drawback is
that the volume between strings can not be uniformly corrected. The present invention achieves
the above object by eliminating such a defect from K, and jPx figure to 7 figures is an
embodiment thereof. In the embodiment shown, a plurality of holes 7 are provided across the
junction of the middle plate 4 and the short block main body 5 so as to cross the longitudinal
direction, ie, the grain direction. In the embodiment shown in Fig. 7 and Fig. Jp7 shown in Fig. 7
and Fig. Jp7, it is not possible to make a recess in the hole 7 and the short piece main body 5, but
in the embodiment shown in Fig. Across the junction, light in the longitudinal direction, i.e., the
direction of the grain. Also in this embodiment, an enclosure is formed in the hole 8 and the
middle plate 4 and the short block main body 5, but it is not cut.
(3) 4R-qnA ') or 7-nA or more, one frame has its own resonant frequency extremely high, and
since the fiber in the direction of wood grain is not cut, it is not necessary to It is possible to
transmit the string vibration of the part to IIl & less, and the volume of the bass part is
significantly increased compared to the conventional short piece, and it becomes 0T ability to
uniformly correct the volume difference between each string The sound can be powerful, deep,
and grow. Age! FyJ # -i is a frequency characteristic diagram showing the effect of the present
invention, which is a frequency characteristic of a conventional six-piece short block, and 4 is a
frequency characteristic of one shown in the fan chart. It is to be noted that the same effect can
be obtained by providing the holes 9 in the oblique direction with respect to the first grain
direction as indicated by the chain line in FIG. As described above, according to the present
invention, the hole is provided straddling the joint portion between the mid plate and the VI
frame main body, and the weave m in the grain direction is left uncut for both the mid plate and
the intelligent body K Therefore, the volume of the bass region can be increased compared to the
conventional short frame, and by increasing the resonance layer wave number of the short frame,
the vibration can be transmitted faster to the plate, resulting in a stronger sound, The depth can
be increased, the richness, the sound expansion, and the dignity enough, and even with the
upright piano, the grand piano I +-[low-pitched effect can be produced. . In addition, since the
volume beauty between each string is uniformly corrected, the piano action * arrangement of the
two]! i: can be omitted.
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