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DESCRIPTION JPS51158223

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DESCRIPTION JPS51158223
BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (a) and 1 (b) are a schematic longitudinal
sectional view and a cross sectional view of a conventional speaker device, FIGS. 2 (a) and 2 (b)
are schematic longitudinal sectional views of a speaker device showing one embodiment of the
present invention 3 a, b, 5 a, b are schematic longitudinal sectional views and cross-sectional
views of a speaker device showing another embodiment of the present invention , And FIG. 6 is
an acceleration vs. frequency characteristic diagram of vibration of the speaker box plate wall. In
the figures, the same reference numerals denote the same or corresponding parts. Reference
numeral 1 denotes a baffle plate, 2 a side plate, 3 a back plate, 4, 5.6 reinforcing lands, 7 a
speaker, and 8 a speaker box. 2 ___ ___ ___ ___ ___ 0 51 - 158223 (2)} 2 figures 3 figures (α) 4
4 阻 与 与 ((((good) -58 - 実 5 5 i - 158 223 50.12.5 To correct the scope of the novelty
registration request for laughing as follows.
DETAILED DESCRIPTION OF THE PROBLEM The present invention relates to a speaker device
which reduces plate vibration of a speaker box by reasonably installing a rugged ledge. The plate
vibration occurring in the speaker box is the sound emitted from the speaker There are shadow
sauces such as causing distortion and exaggeration superiority, so it is necessary to reduce it as
much as possible. The cause line of the plate vibration of the speaker box is mainly due to the
reaction of the vibration of the speaker, * The frame of the speaker moves the baffle plate kffi. (1)
The vibration of the two baffle plate is transmitted as longitudinal vibration (vibration of the
plate surface of the II plate and one thousand row sword) of the side plate in the low frequency
region 9 Vibrates the back plate. The phase of the plate vibration between the plate walls is
complicated and changes irregularly with the vibration frequency of the speaker. Board vibration
of the deck plate wall is large near the center part of the plate surface and smallest at the end
part and corner part. As shown in FIG. 1, the reinforcing bar of the conventional speaker box
includes a reinforcing bar (4) in the vicinity of the central portion of each plate surface of the
back surface (31) which interrogates the buckle plate (1) and the baffle plate (11) The main
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method was to bind them. In the method of FIG. 1, it is the principal purpose to reduce the plate
vibration of the baffle plate 111 and the back plate (3), but since the vicinities of the central
portions where the plate vibration is large are mutually connected by the reinforcing bar 41 , It is
effective when the phases of plate oscillation are in opposite phases, but in the case of the same
phase there was a disadvantage that # ρ was not very effective. The present invention has been
made in order to solve the above-mentioned conventional drawbacks, as shown in FIGS. 2 to 5.
Arbitrary board of the speaker box (8) at the IC figure (2), to the officials - Reno the baffle
boards)) vibrations are large near the central part. (3) and the side plate (2) in the plate 11C
other than the arbitrary plate wall (in the vicinity of the end where vibration of the back plate
(31) is the smallest in the drawing or two or more plates other than the arbitrary plate wall) ))
Are joined by a reinforcing bar so that the plate vibration of the arbitrary plate wall is effectively
reduced. Hereinafter, this invention Oi # will be described in detail according to the illustrated
embodiment. FIG. 2 (ml, FIG. 2 fb) is a schematic longitudinal sectional view and a cross sectional
view showing an embodiment of the present invention, wherein (1) is a baffle plate, + 2) is a side
plate, G) is a back plate, +7 ) Is a speaker. (8) Has beaker box, C are similar to conventional
equipment. (61 is the main point of this invention, near the center portion of the baffle plate Il +.
And an arbitrary point near the tendency of the elongated plate (3).
It is configured in this way and it is in the speaker jlclE. The plate vibration of the baffle plate (1)
is where the Ri seating of the complementary IjI machine (6) in the vicinity of the end where the
vibration is smallest in the back plate (3) is located! It is controlled to the same extent as \ (3)
(Dir1m movement). FIG. 3 (a) and FIG. 3 (b)) are another embodiment of the present invention, in
which the vicinity of the center portion of the baffle plate (1) and the vicinity of the corner
portion where the back plate I 3 + and the side plate ) By the reinforcing bar (6), thereby further
reducing the plate vibration of the baffle plate. FIG. 4 (al, FIG. 4 (bl is another embodiment of the
present invention, and the two embodiments are simplified to obtain the same effect as the effect
of the above two embodiments. In the examples shown in FIGS. 2 to 4. The reinforcing bar (6) is
shown parallel to the side plate (2) of Fig. 2 (-1, Fig. 3 (a), 4). It goes without saying that this is
not limited to parallel ones but may be provided inclined. 5 (a) and 5 (b +) are also another
embodiment of the present invention, the reinforcing bar 16) includes the vicinity of the central
portion of the buckle plate Il +, the back plate (3), and two side plates 2), which is effective for
reducing the vibration of the baffle plate most, is a force (4) · death. In the embodiment shown in
FIG. 5, it corresponds to the baffle plate (1). As for other attachment on the side of Gwang Feng,
as for the spreading plate (the upper corner of 31 is shown, this is not located in the upper
corner, the corner of the lower blade, the right t or the left It goes without saying that the corner
portion or the arbitrary one corner portion can be used as a point. FIG. 6 shows the frequency
characteristic of plate vibration near the central portion of the baffle plate + 11 of the speaker
box (8), and represents the acceleration f of vibration of the plate wall with respect to the input
frequency of the speaker. In this figure, (a) shows the characteristics of the conventional speaker
device of FIG. 1, and L (b) is the measured value of the speaker device of the embodiment of FIG.
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3. As can be seen from this figure, vibration damping effect of about 15 dB is obtained in the low
frequency range which is particularly problematic as compared with the conventional speaker
device. In the above embodiment, the tenure of the baffle plate + 11 and the back plate (3) or the
corner portion formed by the back plate +31 and the side plate is I Meeting - ·) 6 ° 2? □ This is
not limited to the vicinity of the central part of the baffle plate but can be applied not only to the
vicinity of the center part of the back plate (3) and the side plate t), to the walls of the plate walls
other than the plate walls including the boards, It is natural that the same effect sound can be
obtained even if the reinforcing bar 'lt is attached to the corner portion composed of two or more
plate walls.
As described above, according to the present invention, it is possible to obtain the effect of
greatly reducing the plate flying motion of an arbitrary plate wall of a speaker box from K
reinforcement rings t-in.
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