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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention.
FIG. 1 is a perspective view of an acoustic lens device showing a state in which a speaker is
attached, and FIG. 2 is a perspective view showing the same. 01 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · mounting arm, 15 · · · · · · · engaging
portion of the mounting arm, 19 · · · .... speaker mounting portion 20 ...... speaker.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acoustic lens
device, for example, a front layer of a speaker such as a horn layer. In recent years, in order to
soften the strabismus, the (113 co-1 Δ 3 コ Δ 0 穐 4 speaker has a line of sharp + horns in front
of a sharp horn 榎 speaker and n + i It is However, since the outside diameter of the mounting
portion of the speaker is not constant and the size is various, the acoustic lens attached to this
has a tendency to be crystallized exclusively and has j1 regarding the mounting means etc. I do.
SUMMARY OF THE INVENTION The present invention is an improvement on the point # 1 and
provides a versatile high-acoustic lens device that can be easily and reliably attached to speakers
having various outer diameters. Next, an embodiment of the present invention will be described
based on the drawings. (The IJ wedge is formed in a long J shape, and this lens wing (1) is
slanted from the mounting plate 111m in a reduced width shape formed in the length direction
and the mounting plate 5 (2) Lower Oshin) An inclined plate portion 1X () formed by bending in
J-and a substantially notch 1 (Ii) formed at a substantially central portion 1iI of this inclined Illm
+ 31 and further comprising the mounting plate portion (2) ) 411111 IK through holes (5) are
provided. Then, while inserting the above-mentioned lens IIill through the spacer + e + 1 on both
sides between the multiple lenses w-H1 and the lens j1 + 11, respectively, the emirates screw (7)
having a washer is inserted from the lower side. The lens body αα is formed by screwing a bag
nut 19) through a washer (8). Further, qIl is a mounting arm, and this mounting arm +111 is an
L-shaped holding member 811 [13 and its engagement portion that holds the mounting plate
5121 of the lens blade (1) at the top of the upper VcIII and the back thereof. A sloped plate
portion I bent further inward + a + downward from the outer end portion of horizontal 1 [It 13 is
folded at a substantially right angle outward from the lower portion of 0 [1 [part 1] and this
inclined plate portion 114 It is composed of an arc-shaped curved plate portion a9 which is a
holding portion which is folded upward from the lower end portion and bent upward and bent
inward. Further, a guide long groove Q7i is formed in the longitudinal direction in the horizontal
plate portion 118 of the holding portion O, and a butt piece 111m such as felt is fixed to the
inside lII of the curved plate portion uS. Thus, it is elastically formed in a spring plate shape in a
bent plate portion i19 which is a holding portion formed on the inner side of the inclined plate
s04. Further, the curved plate portion usFi is formed in a curved shape so as to be engaged along
an attachment @ of a speaker α9 attached thereto.
Next, remove the snap nuts (9) and watsyas (8) of the head screws (7) on both sides of the
mounting arm (l. Horizontal plate portion of this guide long groove-Insert the draft date Ill α nt
formed on the engaging portion t13 of the pair of left and right mounting arms 1 with the curved
edge 1l (151 inside) at the projecting end of the screw (7) Is attached to the mounting plate @
(21 held on the uppermost lens II (1), and this mounting arm .sigma..perp. Is facing the speaker
mounting Ff 111 of the lens body, that is, both sides of the rear of the lens body 01). Place. And
the opening edge of the speaker housing at the rear of the lens body αO between the curved
plate portion t1 of the left and right mounting arms 1? As it holds, the bent plate portion αS of
the mounting arm tI11 is elastically engaged from the left and right sides with respect to the
mounting Sω of the speaker 09, and the protruding shoulder portion of the chief screw (7) 8)
And when the bag natsu H911 is combined, the coverage air A (11 is fixed in position. Thereby,
the lens body αe is fixed in front of the speaker cage IIK. Then, the plane wave of the speaker 0
can be converted to the spherical surface IIL by this (5) 2 · a (the back pressure directivity can be
improved without deteriorating the sound pressure. According to the non-invention, by providing
a mounting arm having a holding portion engaged with the mounting portion of the speaker on
the speaker coverage side l of the lens body so as to be movable back and forth, various outer
diameters of the mounting portion are different It is possible to provide an acoustic lens device
that can be easily and reliably attached to a speaker that has it, and is therefore extremely