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JPS60219899

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DESCRIPTION JPS60219899
[0001]
l) Field of Publication on the Field of the Invention The present invention relates to a speaker
having a diaphragm in which one surface 16 of one surface of a structure having a large number
of hollow irregularities is joined. The structure of the conventional example and its problems It is
ideal that the diaphragm of the speaker of the speaker moves in a piston over the frequency band
to be used, and the diaphragm is deformed during vibration or split vibration occurs? ) Lunar
wave number characteristics, distortion factor, phase characteristics, etc. deteriorate and
interfere with city fidelity {I} production. In order to solve these problems, in the near 4I, instead
of the conventional paper cone diaphragm, a ?1f? diaphragm has been adopted which uses a
rigid aluminum honeycomb sandinochi structure. However, the aluminum honeycomb has a
drawback that the manufacturing method is double-belled and the cost is very high. Because of
this, instead of aluminum honeycombs, parts r-film and aspect fifu composite polymer finolem-. C
= Flat cane with irregularities due to molding A: A method (hereinafter referred to as core
material) is considered. However, since they all use a sand innoc structure lj as a diaphragm, as
shown in FIG. Table 1 Aj 4 A '3 There are many problems that the portion JJ has a large I <1 + 1
<4 (compared to the conventional paper cone). Also, in general, a 31 L plate speaker drives the
first resonance by driving an in-plane portion of the diaphragm at the first resonance frequency
I] to remove the fh of the speaker from the vicinity of the second resonance frequency of the
diaphragm. You get 79. In the so-called surface drive system% type% in FIG. 2, 4 is an integrated
11 plate diaphragm shown in FIG. 1; 5 is a coupling cone having its opening end fixed to the flat
diaphragm 4; 6 is a voice coil bobbin with its tip fixed to the coupling cone 4; 7 is a voice coil
inserted into the magnetic gap (not shown) of the magnetic circuit 7; 8 is an inner peripheral
edge bonded to the outer peripheral end of the flat diaphragm 4 The outer peripheral end is fixed
to, for example, a frame (not shown) or the like, and a damper 9 supports the voice coil bobbin 6
in a fixed position. In order to transmit the driving force from the voice coil configured in this
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way to the nodal circle at the primary resonance frequency of the Y-plate diaphragm 4, vibration
is generated as compared to the paper cone speaker because it is performed via the coupling
cone 6. Le f '+' (has the disadvantage of becoming heavy. Therefore, the conventional flat plate
speaker has a problem that the sound pressure is lower than that of the paper cone speaker
when the same magnetic circuit is used. The object of the present invention is to solve the abovementioned conventional problems, and it is an object of the present invention to provide a
lightweight and high-performance flat panel speaker.
The speaker according to the present invention has a structure in which a surface material is
joined to one side of a flat thin plate having a large number of radially arranged ridges and a
Heus coil hovin or coupling cone is adhered to the side where the surface material is not joined.
Compared with the sandwich structure 12 generally used as a flat plate diaphragm in the past, it
has a diaphragm having the above-described structure, and lightening can be realized well on
only one side of the surface material. Also, the voice coil bobbin is the uneven part on the side
where the surface material is not joined in terms of the rigidity of the diaphragm. The structure is
fixed and connected by a coupling cone or an adhesive, and the same effect as obtained by
joining 5 double-sided pressure surface materials is obtained, and a sandwich structure 4 (a large
bending rigidity equivalent to that of ? top plate diaphragm) A speaker with a vibrating plate is
realized LIJ ability. Description of the Embodiments The embodiments of the non-prone IJI will
be described below. Third (1) (a), (b) is a configuration diagram of the core of the speaker in the
first application of the present invention], FIG. 3 (&) is a concentric moon pattern, and FIG. 3 (b)
is It is the sectional view on the AA 'line of FIG. 3 (LL). In FIG. 3, 10 is a core material having a
diameter of 28 .mu.m and a height of 1.0..li., Having a pattern shown in FIG. The bar portion 10b
is a recess. FIG. 4 is a perspective view of the core material. As shown in FIG. 6, 11 is a surface
material made of an aluminum foil (thickness 2 o.mu.m) attached on one side of August 10 (the
side in contact with four portions 10b in FIG. The diaphragm is made of a structure made of
plaster. 13 is an epoxy resin for bonding the upper part i :: j of the voice coil bobbin 14 to the
surface 102 where the surface material 11 is not in contact with the strip 102L on the surface
which can not be attached; 15 is provided at the lower end of the voice coil bobbin 14 The voice
coil is incorporated in the magnetic circuit of a tweeter speaker that reproduces high frequencies.
16 is work, di. Fig. 6 is a speaker configured as shown below? It is an I pressure new year
number feature figure. The sound pressure frequency characteristics of the speaker using the
conventional sandwich-like 41j flat diaphragm configured with the same buildup as this
embodiment are shown because of the ratio of 11%. The loudspeaker of this embodiment has a
diaphragm weight of 123 mf and is 4 ik lighter than the diaphragm weight 172771F of the
conventional example, so that a high sound pressure level can be obtained on the sound pressure
frequency characteristics. Next, a second embodiment of the present invention will be described.
The present embodiment differs from the first embodiment in that mica aggregate having a size
of 8-400 diatomaceous flakes and paper-formed mica can have a thickness of 601 tm
impregnated with about 2017 t% of epoxy resin. An epoxy composite sheet is heated and press-
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formed to have a pattern shown in FIG. 3. The core material of diameter 28 ? r; '+' g 1, using
ONM core, and other constitution is the first embodiment. Similarly to the above, the surface
material 11 on one side of the Mf core material.
The end of the voice coil bobbin 14 is in contact with the other surface as j'a cis py force. FIG. 7
is a sound pressure frequency characteristic diagram in the second embodiment. For comparison,
the ISS station frequency characteristics of the speaker using the conventional Suntoy, chi-tei Ha
11? board vibration Ji # board configured with the same cumulative month as this embodiment
are shown. The speaker of the present embodiment has the following features: ll The processing
city i + j is 120771r and the diaphragm 'fi of the conventional example is lighter than the :: C
170mV i! Therefore, high frequency characteristics + zV-1; '; high pressure level can be obtained.
Next, the third embodiment will be described with reference to FIG. In FIG. 7, numeral 17
indicates a single-piece material formed by the mica / eboegishi composite sort, and a surface
material 18C aluminum foil 20 ?m is stuck on one surface of the core material 17 (; j). A voice
coil bobbin 19 has a surface material 18 attached (, I is not in contact with the end of the L end
and is t1)], and a voice coil 20 is provided at the lower end of the voice coil bobbin 19. ????
Reference numeral 21 denotes an Ebegishi-contact Jh agent having a width Q, 52Qj, and a Ushaped pad V applied to the outer periphery of the voice coil bobbin 19. Configure a system. FIG.
8 is a sound pressure frequency characteristic diagram of the vibration system of the
loudspeaker of this embodiment, which can have a high sound pressure level as in the second
embodiment. Next, the ninth embodiment of the fourth implementation side 1. This will be
described with reference to FIG. In FIG. 9 and FIG. 1o, 22 is a mica obtained by forming scaly
mica having a size of 8 to 400 Tsuno / Yu into which approximately 20 wt% of epoxy resin is
impregnated in an integrated mica / -1- (I? 60/7 m). и A diameter of 28 sheaths having a pattern
shown in FIG. 9 by heat press molding an epoxy composite sheet, height 1, o my s s 1 t, plate-like
grate, 23 Iri core 4A '22 t 7) h l / u (Surfaces made of aluminum foil (thickness 2 o ?m) pasted
by the polyamide adhesive 24 on the concave g22b (face in contact with Ill in FIG. 9), 25i, 1
'surface (123 pasted The voice coil bobbin 527 whose upper end is bonded to the non-opposite
surface by the epoxy resin 26 is provided at the lower end of the voice coil bobbin 25 and is a
voice coil. It is h. 281, an edge, and 29 are filled in the concave portion 22b] The epoxy resin J8
agent is cured, and the ridges 22 & are connected and fixed to form a diaphragm. As described
above (FIG. 11 shows the high voltage frequency inferior VL of the speaker j4).
For comparison, the same elements as those of the fourth embodiment 1] ((1) also show the line
lunar lunar number characteristics of the speaker using the conventional solar structure-based
diaphragm plate made of 1). In the loudspeaker of this embodiment, the diaphragm assembly i1t
is 145 my and the weight of one sliding plate of the conventional example: (?i 170711 ? ? is
lighter than 11 (because it? Pressure frequency characteristics-[; 1] has the advantage that 1 "1
pressure level can be obtained, and further has a structure 5 to connect the ridges by filling the
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adhesive in four parts of the core material, The apparent rigidity is equivalent to that of the
sandwich W body, so that the rigidity of the diaphragm is low: JL-1 ? b (7h) is also equivalent to
that of the conventional example. In the third embodiment, the adhesive 21 is coated in the form
of concentric circles, but the adhesive 21 is not limited to one, but it may be a concentric solid if
it is flJ, and similar effects can be obtained. . 1 In the fourth embodiment, the epoxy adhesive 29
is filled in the four parts 22b in order to connect the ridges 22 &; however, the filling and filling
thereof are always required to be filled in the ridges of the four parts 22b. The ridges 22a may be
connected by filling one portion of the four portions 22b. Furthermore, the shape of the ridges
22a may be any shape other than / J :: in this embodiment, for example, a circular cross shape in
IY or an F square, and the same effect can be obtained if the force 5 is arranged radially. . In
addition, it is applicable not only for the tweeter having a diameter of 2811 but also for a
speaker having a large-aperture Skooka and a diaphragm of the U-ha river 41. Effect of the
Invention As described in detail below, according to the present invention -1, a surface material is
joined to a large number of convexly arranged thin plate pieces ? 11 arranged in a shape of a
weir 1 and a surface material is not joined. A voice 21 l bobbin or an end 4 of a coupling cone:
The bonded structure is used as a speaker diaphragm. For this reason, compared to the sandwich
structure 4 used in the conventional flat diaphragm, the surface material may be on one side, and
it is possible to lighten the vibration system, and the sound pressure frequency 4. The sound
pressure can be obtained as I: h. Sand-in structure because convex ridges are connected and fixed
to the surface not to stick the surface] A on the surface of rigid diaphragm by voice coil voice,
force, ring ring or Vl, 1) bonding agent It is a structure such as a body and apparent upper turn,
and has sufficient side illumination as a diaphragm, and its effect is human.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view of a conventional sandwich structure flat diaphragm, FIG. 2 is a
cross-sectional view of a conventional .1 /. Plate speaker vibration system, and FIG. 3 (2L) is a
first embodiment of the present invention.
2nd. The heart IA pattern in the third embodiment, FIG. 3 (b) is a cross-sectional view taken along
line AA 'in FIG. 3 (a), FIG. 4 is a perspective view of a concentric weir, FIG. . Sectional view of the
vibration system of the speaker in the second embodiment, FIG. 6, FIG. 8, and FIG. 11 are sound
pressure frequency characteristics of the speaker in each embodiment, and FIG. 7 is the speaker
in the third embodiment. 9 (IL) is a diagram of the moon pattern of the speaker in the fourth
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embodiment, and FIG. 9 ('b) is a cross-sectional view along the line B-B' in FIG. 9 (IL). FIG. 10 is a
cross-sectional view of the vibration system of the speaker of the fourth embodiment. 10 иии 8, 8 &
10 & ... convex portion, 11 и и и surface A, 12 и и и и и и и и Polynedel system jg I 'l' agent, 13 и и и epoxy
resin, 14 и и voice coil bobbin 1.15 .. Hois coil. Name of agent Attorney Nakao Toshio et al. 1 Fig. 2
Fig. 3 Fig. 6 Fig. 6 cd 81 Fig. 7 N 19 Fig. 8 (d or '591' 2222 b 22 ? Fig. 11 Fig. 11 ? Correct
number
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