close

Вход

Забыли?

вход по аккаунту

JPS5138433

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS5138433
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the shape of the edge portion
of a conventional speaker diaphragm, FIG. 2 is a view showing the shape of an edge portion of
the speaker diaphragm of the present invention, and FIG. FIG. 4 is a view showing another
embodiment of the present invention, and FIG. 5 is a view showing an example of sound pressure
frequency characteristics of a speaker using the present invention. 1 is an edge portion, 4 is a Vshaped central tip portion. 1st good Figure 2-actual opening 5l-38433 (2) (α (b) third same
fourth destruction number (H2I figure 76 =
DETAILED DESCRIPTION OF THE INVENTION The present invention aims at providing a speaker
from which reverse resonance and other harmful enone resonance in the mid range of the edge
part are removed, and more specifically, a diaphragm for a speaker in which the shape of the
edge part is improved. About. Conventionally, the 177 part 1 of the speaker diaphragm is, as
shown in FIG. 1 j, used in a shape in which a plurality of corrugations 3 are concentrically
formed. 2 is a corn part. However, because this shape is small in rigidity and small in freedom of
displacement with respect to the axial vibration of the cone 2 and has a large degree of freedom
for displacement, it causes an edge at the frequency immediately before entering the division and
disturbance region. Part 1 and cone part 2 are in reverse phase and sharp I. As shown by the air
line in FIG. 5, resonance occurs (reverse resonance), and a sharp dip called midtone valley is
generated on the sound pressure frequency characteristics. For this reason, in the speaker
diaphragm of this type, there is an attempt to damp the reverse resonance or other harmful
enone resonance by applying an enone paint made of a visco-elastic resin or the like to the edge
portion 1. Because of the weight of the edge part, the efficiency of the enon coating increased
and decreased, and additionally there was the disadvantage that extra edge coating was required.
The present invention is an improvement of the shape of the enone part 1 to significantly
improve the above-mentioned drawbacks. The specific shape will be described with reference to
the embodiment shown in FIG. 2 and FIG. In FIG. 2, 1 indicates an edge portion, and 2 indicates
12-05-2019
1
an on-portion. The edge portion 1 is formed in a radial longitudinal cross-sectional shape or an
IV shape, and a V-shaped central tip 4 or a convex substantially semicircular shape. 1 Figure 4 is
the center tip II 4 for V-shaped! ! ] It has been lost in the form of a semi-circle. The V-shaped
linear portions 5a and 5b of the 1-enone portion 1 have the longitudinal square noises reduced
to suppress the amplitude at resonance as compared with the corrugated portion in which a
plurality of corrugations 3 are arranged. Hold enough rigidity. This is clear by comparing the
vibration (resonance) states of the wave-shaped beam and the straight beam which are
approximately fixed at one end (FIG. 3). Further, since the substantially semicircular shape of the
central tip 4 has sufficiently low rigidity as compared with the other straight portions 5a and 5b,
it has a linearity of car displacement which is comparable to that of the conventional one as a
whole, and is sufficient Have great compliance. Therefore, a speaker using such a speaker
diaphragm is the straight portion 5 a of the edge portion 1. Since it has a sufficient rigidity of 5b,
the reverse resonance at the frequency just before entering the divided vibration region and the
divided vibration and other harmful edge resonances in the divided movement region are
significantly suppressed so that the solid line in FIG. ) A sharp tip in the midrange due to reverse
resonance was removed.
It is possible to obtain a balanced reproduction without distortion in the entire band. As
described above, the present invention is not limited to only the above-described embodiment. In
other words, the radial cross section of the edge portion 1 is V-shaped, and the center tip 4 is
convex or concave. Since it has a substantially semicircular shape, the V-shaped straight portions
5a and 5b have sufficient rigidity to suppress reverse resonance and other harmful enone
resonances, and in particular by reverse resonance without resonance peaks due to harmful enon
resonances. It is possible to obtain an undistorted, well-balanced playback sound over the entire
band, with the mid-range sharp dip removed. : Is! Iiil Letter 11r: K ′ ′) Figure 1 is a view for
reducing the shape of the edge portion of the conventional speaker diaphragm, FIG. 2 is a view
for showing the shape of the enon portion of the speaker diaphragm of the present invention,
FIG. FIG. 4 is a diagram showing another embodiment of the present invention, and FIG. 51 is a
diagram showing an example of sound pressure frequency characteristics of a speaker using the
present invention. 11 is an edge portion, and 4 is a V-shaped central tip. □□) No, +---, 1, 7: 3. ,
333 1 Fig. '2-----, 5b 5 α' '! J2 Figure: 5 Yu bAn3 ',' '' ',', '7, -5'%-'; (α-\,-+ /-,-+ 11 (b) 302- 1-\7′4 ゝ · 5b 4 □ Q% 401 sound quality 1 dB) 50. 0020 011 1100 ++ 21 XIO 50 m II jI law (Hz)
Fig. 5: "r 'i J
12-05-2019
2
1/--страниц
Пожаловаться на содержимое документа