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DESCRIPTION JPS5323228

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DESCRIPTION JPS5323228
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a conventional acoustic
cabinet, FIG. 2 is a perspective view of a reinforcing rod used therein, FIG. 3 is a perspective view
of the acoustic cabinet of the present invention, FIG. B is a perspective view of an embodiment of
each reinforcing rod used for it and an explanatory view of correction of warpage of a plate
material, FIG. 5 AsB 'and FIGS. 6A and 6B, vibration modes of the board surface of the present
invention at a certain vibration frequency The vibration mode of the plate surface of the example
is shown. 4 ... acoustic cabinet, 5a, 5b ... plate material, 6a, 6b ... reinforcing rod, T ... wood screw.
Cape Yoyo = ρ ~
DETAILED DESCRIPTION OF THE PROBLEM The present invention relates to improvement of an
acoustic cabinet such as a sealed type speaker cabinet and the like, in which an inner surface of a
box body assembled with a plate member is provided with a concave or convex surface facing the
plate member By changing the acoustic characteristics (improving) by reinforcing the plate
material and correcting the warpage of the plate material by bending the curved reinforcing rod
so as to attract the plate material having the reciprocal motion against the opposing surface, For
example. FIG. 1 is a perspective view of a conventional reinforcing rod 1 attached to the inner
surface of an acoustic cabinet (1) 9-2 Hiroi 2-2, and FIG. 2 is a perspective view of the reinforcing
rod 1, Since the abutment surface of the rod l with the sheet of sheet material 3 is straight, by
attracting the warp on the warped portion of the plate material 3 constituting the acoustic
cabinet 2, it is possible to correct the warping to some extent and to acoustically Although it is
possible to reinforce the cabinet, its correction is not perfect, and improvement of acoustic
characteristics can not be expected much. According to the present invention, a reinforcing rod
in which a surface facing a plate material is bent into a concave shape or a convex shape is
divided into a reinforcing rod in which the surface facing the plate material is concaved in
accordance with the warpage state of the plate material constituting the acoustic cabinet, By
choosing which reinforcing rod bent into a shape and by placing it on the warped portion of the
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plate material, it corrects the warpage and reinforces the plate material. Hereafter, together with
Figures 3 and 4 explain. FIG. 3 is a perspective view of the present invention, FIGS. 4 (4), 4 (a)
and 4 (b) are a perspective view of a reinforcing rod and an explanatory view of correction of
warpage of a plate material, and 4 is an acoustic cabinet made of a plate material, (2) i / 8 inside
the plate materials 5a, 5a, the reinforcing rod 6a, the surface of which opposes the plate material
is convexly curved, is bent into a convex shape Is brought into contact with the inner surface of
the plate member 5a where the anti-9 is generated, and both end portions of the reinforcing rod
6a are fastened to the plate member 5a by means of a lignet) 7 or the like. Then, the plate
material 5a having the anti-shield is attracted (attracted) to the convexly curved facing surface of
the reinforcing rod 6a, so that as shown by the solid line in FIG. 4 (8) As shown by the one-dot
chain line, the anti-shake is corrected. Also, when the plate material is warped as opposed to the
above, as shown in FIG. 4 (B), the reinforcing rod 6 b whose concave surface facing the plate
material is curved is warped by the concavely curved opposing surface And the central portion of
the reinforcing rod 6b is fastened to the plate member 5b by a wood screw 7 or the like. Then,
the warped plate 5b is attracted (drawn) to the concave curved facing surface of the reinforcing
rod 6b, so that the warped plate 5b as shown by the solid line in FIG. 4 (2) Warpage is corrected
(3) '') as shown by the dotted line. · 5 Panorama In each of the above embodiments, even if an
adhesive is applied to the opposing face before fastening the reinforcing rod to the plate material
Good.
FIG. 5 (A) is a vibration mode of the plate surface when a reinforcing rod used for this invention
at a vibration frequency of 60 Hz is attached to a plate material, and (6) is a view showing a plate
surface to which a conventional reinforcing rod is attached Of the vibration mode. Fig. 6 (2)
shows the vibration mode of the plate surface when the reinforcing rod used for this invention at
the vibration frequency of 100 Hz is attached to the plate material, and @) shows the plate
attached with the conventional reinforcing rod This is the surface vibration mode. As is apparent
from these vibration modes, it is understood that the conventional vibration mode is a
complicated vibration mode, whereas the vibration mode in this invention is a vibration mode
without complicated change. Furthermore, it is possible to obtain a vibration mode without
complicated vibration by adding Si, reinforcing rod attachment, which changed the attachment
position of the reinforcing rod in this invention while measuring the vibration mode Beef, sand
(4) We can improve the acoustic characteristics of the acoustic cabinet.
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