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7?? иии 7 \ j baffle plate d ? Denno Tonoyuki Patent IXA ? ? ? ?. 'Agent-Shishisho
Marunouchi, Chiyoda-ku, Tokyo-Chome 5th No.1. [Phase] Japan Patent Office 0 JP-A 50-770330
published Japan 50. (1975) 6.24. Japanese Patent Application No. 4'8 '-//' l'p 37 Office serial
number M, ? 5, rs Description of the Invention Title of the Invention The marble of the speaker
cabinet is used with the outer layer and the inner layer of the speaker cabinet The outer layer is
formed of marble, the inner layer is formed of glass fiber reinforced synthetic resin, and the
intermediate layer is formed of soft synthetic resin. Baffle plate of the speaker cabinet to be.
Detailed Description of the Invention The present invention relates to a buckle plate of a speaker
system used for a radio receiver, stereo electric storage, etc., so that natural marble is used on
the surface to enhance the appearance and reduce the vibration. It is. In the speaker system,
pressure may act on the cabinet 7 due to the sound pressure of the speaker, and the cabinet may
vibrate at the natural frequency of the cabinet. The vibration of the cabinet is undesirable
because it causes peaks and valleys in the frequency characteristics of the acoustic signal
reproduced from the speaker. Loudspeaker cabinet wires are mainly made of wood particle board
and the like from the past and often vibrate. For this reason, the thickness of the plate is
increased or a reinforcing material is attached to the back of the plate to prevent vibration.
However, there is a limit to increase the thickness of the plate for the purpose of attaching the
baffle sales company speaker to attach the speaker in this speaker yavinet, and there is a
reinforcing material because the sound emission hole of the speaker is provided at the center of
the baffle plate. It can not be mounted effectively and it is difficult to prevent the baffle plate
from vibrating. Also, when the frequency of vibration applied from the outside matches the
natural vibration frequency of the baffle plate, the baffle plate resonates and vibrates, but the
sharpness q of this resonance is large, which is not preferable because peaks and valleys occur in
the frequency characteristics. The present invention is to obtain a buckle plate of a cabinet and a
cabinet by using a small amount of marble with line vibration. An embodiment of the baffle plate
according to the present invention will be described below with reference to the drawings. FIG. 1
is a front view showing an embodiment of the baffle plate according to the present invention, and
FIG. 2 is a cross-sectional view thereof. The sound emitting hole 3 and the light emitting hole
EndPage: 1 are formed, and a plurality of screw holes 4.5 for speaker attachment are provided
around the two sound emitting holes 2.3. The screw holes 4.5 are respectively pierced through
the baffle plate l. Further, near the periphery of the baffle plate 10, a plurality of mounting holes
6 for fixing the baffle plate 1 of the kernel to the speaker cabinet K) are provided. As shown in
FIG. 2, the baffle plate 1 has a three-layer structure having an outer layer 7 and an inner layer 8
and two double-layered coughs 9 as shown in FIG. 2, and the outer layer 7 is formed of natural
marble. The inner layer 8 is formed of glass fiber reinforced synthetic resin and the intermediate
layer 9 is formed of soft synthetic resin tt5. And such a baffle plate can be obtained as follows.
Unsaturated polyester resin иииииииииииииииииииииии 61: IJll Chiyo) strand mat ииииииииии
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии ииииииииииииииииииииииииииииииииииииииииииииииииииииииии ииииииииииииииииииииииииииииииииииииииии o , Jg As the
unsaturated polyester resin above, Showa Polymer and this polyester resin are added with cobalt
naphthenate as an accelerator and mixed well!
To the mixture is added methyl ethyl ketone peroxide as a catalyst and mixed well to obtain an
unsaturated polyester resin solution. Next, a flat plate frame is prepared, and a mold release
agent is applied thereto, and then two chopped strand mats are impregnated with the
unsaturated polyester resin and laminated by hand, and then K is further subjected to roving
cloth 1 A sheet of polyester resin is impregnated while being laminated, and then one chopped
strand mat is similarly laminated thereon. Then, it is cured at room temperature, removed,
removed, and a glass fiber reinforced plastic sheet is obtained. Next, prepare the following as an
intermediate layer. Soft unsaturated polyester "resin ........... 7109 methyl ethyl ketone peroxide-55
liquid solution ..... иииииииииииииииииииииииииииииииии 7y cobalt naphthenate
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии For example Use company product Rigorack 701F. And
cobalt naphthenate is added to this polyester resin as a promoter and mixed well, J! ! To the
mixture, methyl ethyl tartrate peroxide is added as a catalyst and mixed well to obtain a soft
unsaturated polyester resin solution ?. Next, prepare a marble plate of 301 horizontal, 54
vertical, and 8 thick, and fix this marble plate and the glass fiber reinforced synthetic resin plate
facing each other with a space of 4-, The saturated polyester resin solution is injected and cured
at normal temperature. Then, it is left in an atmosphere of 60 ░ C. for 1 to 2 hours to completely
cure. After curing, a speaker sound emission hole, a speaker attachment hole and the like are
opened to obtain a baffle plate of a three-layer structure in which the surface is marbled, the
inner surface is glass fiber reinforced synthetic resin, and the middle layer is soft synthetic resin
f. And by the baffle plate according to the present invention, since the outer layer is marble, the
appearance is enhanced, and the mass is relatively large. No movement, deer also lowers the
resonance Q with the soft synthetic resin in the middle layer to further suppress vibration,
increase the strength of the marble in the inner layer, and prevent the marble from being
damaged. As shown in FIG. 3, as shown in FIG. 3, it is attached to the front of the speaker cabinet
13 made of wood and screwed to the crosspiece 14 fixed inside the cabinet 13). Further, the
medium and high sound speaker 1G and the low frequency speaker 11 are attached to the sound
output hole 2.3 with the screws 12.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a baffle plate according to the
present invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a speaker cabinet for a
buckle plate according to the present invention? ) Is a cross-sectional view showing a state where
it is attached. 1ij / (tuffle plate, 2 and 3 are sound release holes, 4 and 5 are speaker attachment
holes, 6 is a baffle plate attachment hole, 7 is an outer layer, 8 is an inner layer, and 9
interlayers. "Agent patent attorney thin 1) Ri и и EndPage: 2 list of documents attached with
attachments (]) 1 statement (2) 1 drawing (3) 1 letter of attorney (4) 1. 'i, 1 request duplicate 1)
Inventors, patent applicants or agents other than the above Inventor's address same as above
Patent applicant's address Tokyo Giyoda-ku Yurakucho l No. 5 name (434) Nippon Oil Co., Ltd.
representative village 1) notice of change of address Showa 10/37 37 Patent Application Office
Secretary Hideto Saito l Case display Japanese Patent Application No. 4? -No./Ri 2 Raf (case of
reference to Showa year No. 1) case Patent originator old address former address Tokyo 1st
district Chiyoda ward Yurakucho j address New address ? 100 Tokyo 6th district Yurakucho
Chiyoda ward 10 @ 1 ( 4tJ9t) Nippon Oil & Fat Co., company representative village 1) Tsutomu
11,-NEndPage: ?
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