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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a flat plate skier according to
the present invention, FIG. 2 is a cross-sectional side view thereof, and FIG. 3 is a partial detail
view of FIG. 1 ииииии Diaphragm, 2-5 иии и и и Support bar, A9 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и support plate, 12 и и и g, 15 и и и и и и и и и и и и и и и и и и и voice coil, 17S hole. No 5-. '12 Figure e 3, 1 1
1 1 1 1 9 9 6 1 7 1 1 no ? 1: 1-r 1- 21 1 1-year-old 1, -g-"+ 'l, -4, -81, qB bow: 7 и / l, this J /-two:
и и и-7f (one-1; 4z two-to-7 J two One-to-one ::: l: / l to one-one-one-one 3-81-real open 48-58737
(2) spirit 2} swamp ?, 3) Vortex one 82-
[Detailed description of the invention] Flat-plate speaker using a plywood as a diaphragm is an
advantage that a photo or fcFi picture etc. can be stuck on the diaphragm to give a unique
appearance. The purpose of this invention is to make it possible to mass-produce the sound
quality with good sound quality and uniform performance. The following is an explanation of the
present invention with reference to the drawings. In FIG. 1, (1) is a diaphragm made of plywood,
(2)-(6) u This supporting structure of this diaphragm (1), these supporting structures have a
small amount of gap e between them. It is placed and fixed to the diaphragm (1). A pair of
opposing support structures (8) (in season, near the center of these support structures, a pair of
weirs (a) (? ) Tl) 4B-58737-02 the mounting of the drive part (8) is bridged as a component.
Reference numeral (sl) denotes a support plate attached to the diaphragm, and a support plate as
an intermediate member which supports the support of the drive portion IIh (8) by the abovementioned II (6 bumps) attached to the round harmonic generation preventing wedge. The
anteroposterior relationship of the various components listed above is shown in FIGS. The drive
unit (8), as shown in FIG. 3C, has a central hole (6) and has a magnetic circuit comprising a yoke
(a), a magnet (not) and a plate-and a damper connected to the voice coil). v) Threaded screws-for
preventing harmonics! It is fixed to the diaphragm (1) via i (9). The central hole (b) is provided in
the yoke and the support plate in order to enable this fixing by means of a wood screw. In the
above description, the entire structure of the flat speaker according to the present invention has
been obscured, or the main point of the present invention is that the local support of the
diaphragm (1) made of plywood is pointed out earlier. In support of @ (2) (8) (in season (6)), it
was in the state where it was done in the state which can measure the gap. In other words, the
circumference S of the diaphragm (1) made of the veneer of the flat panel speaker according to
the present invention is not supported by the closed frame "48-58737-03". Assuming that the
above-mentioned support capable of measuring the distance from the support by the closed
frame is called "open support", the difference between these supports is that in the former the
closed frame vibrates. It is possible to apply tension to the plate from the beginning of the
installation and to apply tension over time, while in the latter case it is not. The advantage of
open support, which leaves no room for tension to the diaphragm (1), is that the number of
resonant peripherals f of the diaphragm (1) is low, and if the diaphragm (1) is made of plywood, t
may be several tens The point is that it can be reliably reduced to the order of cycles / second.
The vibration part made of plywood can increase its coincidence frequency f to the order of
several hundred cycles to 7 seconds due to the relationship of tension applied to the diaphragm
when it is closed. Since the natural vibration generated each time the frequency of the forced
vibration applied by R approaches r has a relatively long duration, the natural vibration becomes
1 at the main part of strong 1IIi peristalsis, and the f quality is significantly impaired. However, in
the case of the present invention, this shortcoming is completely eliminated.
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