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JPS55144475

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DESCRIPTION JPS55144475
BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1a and 1b are a front view and a sectional view
showing an example of a conventional two-way speaker, and FIG. 2 is a front view showing
another example of a conventional two-way speaker, 3a and 3b are perspective views showing an
embodiment of the present invention, FIG. 3c is a cross sectional view taken along line A-A of FIG.
Fig. 4 is a perspective view showing another embodiment of the present invention, Fig. 4 is a
longitudinal sectional view taken along the line B-B of Fig. A, Fig. 5a is a perspective view
showing a different embodiment of the present invention, Fig. 5 5A is a longitudinal sectional
view taken along the line C-C of FIG. 5A, and FIGS. 6A, 6B, and 6C are different sound pressure
frequency characteristics of the vehicle-mounted speaker. In the figure, 1 is a woofer (speaker for
low-pitched portion reproduction), 2 is a tweeter (high-pitched portion reproduction speaker), 4
to 6 are speaker boxes.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a box type car
speaker system with improved high frequency characteristics. In a 2-way or 3-way speaker
system, as shown in FIG. 1, woo · (speaker reproduction speaker) 1 and tweeter (treble unit
reproduction speaker) 2 are concentrically mounted on one stone 1- Or, as shown in FIG. 2, it is
common to attach separately to the same surface of the box 3. There is no particular problem if
the speaker system is also able to select the vortex position # arbitrarily, but if this is installed in
a car, the crystal area 7〒-, L /,> characteristic is degraded Often. That is, as the speaker
installation position in a car, the Sandietsuki (or trunkhod) at the rear of the seat is usually
selected in many cases, but in so-called Hutchi Pack cars etc. with deployable doors at the rear,
the width and Because the space is small, the speaker mounting surface of the box type speaker
can not often be directed to the listener 1111. In such a case, the low frequency characteristics
do not deteriorate because the low frequency directivity is weak, but the high frequency has a
strong directivity, so if the tweeter 2 can not turn to the listener, the high frequency
characteristics are remarkable. And there is a drawback of deterioration. SUMMARY OF THE
02-05-2019
1
INVENTION The present invention provides an on-vehicle speaker improved by attaching a
woofer and a tweeter to a substantially orthogonal surface of a speaker box. This will be
described in detail with reference to the illustrated embodiment. The furnaces 3 to 5 are
embodiments of the present invention. In the example of FIG. 3, the woofer is attached to the
wide surface 4a of the narrow speaker box 4 with a width W, and the tweeter 2 is attached to the
narrow side 4b of the area orthogonal to the side 4a. In the figures (a) and (b), there is only a
difference in whether the intersection between the surface 4a and the side surface 4b is curved
or bent, and there is essentially no change. In the figure (cl is a cross section taken along the line
A-A in the figure (b), when the tweeter 2 is directed forward (in the direction of the listener) F &
C, Is shown. The on-vehicle speaker of this embodiment is effective when-of the installation
location is narrow. On the other hand, the embodiment of FIGS. 4 and 5 is effective when there is
a height restriction at the installation location. 0 In the example of FIG. 4, the lower part of the
speaker box 5 with the height H1 having the step part Attach the surface 5aK woofer and
increase the tweeter 2 to the step side 5b inclined at an angle close to 900 with this ■ In the
example of Fig. 5, attach the lower surface 6alC woofer 1 of the speaker box 6 at the height ■
Also attach the tweeter 2 to the 1111 face 6b which is inclined at an angle close to 90 ° with
this.
Then, when the tweeter 2 is turned forward F, the woofer in FIG. 4 is directed upward Ui, and the
woo 1 in FIG. 5 is directed downward DYr. The width W can be set in the case of the third
evening 1 and the heights Hl and Hlt-respectively in the case of FIGS. 4 and 5F smaller than the
diameter of the woofer 1 respectively. Therefore, the tweeter 2 can be directed to the forward FK
even when the 1 can point to the forward y to the woo- due to space constraints, so that the
deterioration of the high frequency characteristic can be prevented. Fig. 6 is a sound pressure
frequency characteristic diagram showing this; Fig. 6 (a) shows anechoic chamber characteristics,
Fig. 6 (b) shows actual vehicle characteristics of a conventional on-vehicle speaker, Fig. 6 (ci
shows gravity i Improved characteristics. In the conventional car-mounted speaker, when the
tweeter can not point to the front due to the restriction of the installation space, the high
frequency characteristic is deteriorated in the hatched portion of FIG. 1 (b). Does not degrade the
area characteristics. The broken line in FIG. 6 (e) is a comparison of the entire island area shown
in FIG. 6 (e). As described above, according to the present invention, the speaker for reproducing
the low-pitched part is heard due to the restriction of the installation space. Since the high-tone
part reproduction speaker is directed to the listener side even when it can not be directed to the
person side, there is an advantage that deterioration of the high frequency characteristic can be
prevented.
02-05-2019
2
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