close

Вход

Забыли?

вход по аккаунту

?

JPS5796596

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS5796596
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view of a conventional
electrodynamic speaker, FIG. 2 is a sound pressure frequency characteristic diagram of the
electrodynamic speaker, and FIG. 3 is one embodiment of the present invention. Fig. 5 is a half
sectional view of the main part of the electrodynamic speaker, Fig. 4 is a sound pressure
frequency characteristic diagram of the electrodynamic speaker, Fig. 5 and Fig. 6 are half
sectional views of the main part of another embodiment of the present invention. FIG. 1 и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
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 ... flat diaphragm, 7 ...... edge member, 8 ...... reinforcing ring,
9 ...... conical member, 10 ...... Koirupobin, 11 ...
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
иииииииииииииииииииииииииииииииииии Aluminum, titanium , FRP thin film, 15 ..... thin film of elastic material. 1111 '",
411 Fig. 4 Fig. 5
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrodynamic
speaker using a flat diaphragm, and it is an object of the present invention to prevent the
occurrence of distortion due to surface resonance of a cone-like member for transmitting the
vibration of a coil bobbin to the flat diaphragm. It is a thing. FIG. 1 shows a conventional
electrodynamic speaker of this type. In FIG. 1, 1 is a yoke integrally formed with the center pole
2, 3 is an annular magnet fixed to the upper surface of the yoke 1, 4 is an annular plate fixed to
the upper surface of the magnet 3, An annular magnetic gap is formed between the inner
peripheral surface of the 2 '\ 4 and the outer peripheral surface of the center pole 2). The
reference numeral 6 denotes a frame fixed to the plate 4 and 6 denotes a flat diaphragm. The
outer peripheral portion of the flat diaphragm 6 is supported by the above-mentioned frame 6
via an annular Enon member. The flat diaphragms, etc. use, for example, a diaphragm having a
six-sandwich structure by bonding a surface material to both surfaces of a honeycomb core
material. A reinforcing ring 8 is adhered to the lower surface of the flat plate diaphragm 6, and
11-05-2019
1
the reinforcing ring 8 is provided inside the cylinder in the first resonance of the flat plate
diaphragm 6. Reference numeral 9 denotes a cone-shaped cylindrical cone-shaped member,
which is formed of aluminum, FRP (fiber reinforced plastic) or the like. The large diameter end of
the cone-shaped member 9 is fixed to the BC reinforcement ring 8, and the cylindrical coil bobbin
10 is fixed to the small diameter end of the cone-shaped member 9. A voice coil 11 is wound
around a coil bobbin 1o, and the voice coil 11 is disposed in the magnetic gap portion. ????
??????? In FIG. 1, when a signal flows through the voice coil 11, the voice coil 11 and the
coil bobbin 5 "-one noise; 1o vibrate integrally, and this vibration is a flat plate vibration through
the cone-shaped member 9. It is transmitted to the plate 6 to drive the inside of the cylinder at
the first resonance of the flat diaphragm 6. As described above, when the joint portion in the first
resonance of the flat plate diaphragm 6 is driven, the sound pressure peak at the first resonance
frequency in the sound pressure frequency characteristic is removed, and the high-frequency
reproduction band up to the second resonance frequency Will expand. In addition, using a coneshaped member 9 as shown in FIG. 1 has an advantage of enabling nodal driving of the flat
diaphragm 6 using a small magnetic circuit. However, when the cone-shaped member 9 is made
of a kind of material such as aluminum, titanium, FRP, etc. like the above-mentioned conventional
speaker, surface resonance occurs in a high frequency range and appears as a child in terms of
characteristics, which is not preferable for hearing It was a thing.
FIG. 2 shows sound pressure frequency characteristics (solid line), second harmonic distortion
characteristics (dashed line), and third harmonic distortion characteristics (dashed dotted line) of
the conventional speaker. The second harmonic distortion appearing at 1600 to "" in FIG. 2 and
at 21.6000 Hz is due to the plane co-imaging of the coin-like member 9. The resonance peak
appearing at 3200 Hz is due to the resonance occurring at the root of the cone-like member 9.
The present invention eliminates the disadvantages of the prior art, and an embodiment of the
present invention will be described below. Example 1 ] As shown in FIG. 3, adhesive adhesive or
foamable resin adhesive 130 both sides, aluminum, titanium. The cone-shaped member 9 having
a three-layer sandwich structure in which a thin film 14.14 'such as FRP is bonded is used.
According to this embodiment, the resonance mechanical energy in the cone-shaped member 9 is
a thin film 14, 14'. The distortion due to surface resonance is reduced because the heat energy is
converted to thermal energy which is generated at the time of shearing. As described above,
according to the present embodiment, in addition to the surface resonance damping effect, there
is also an effect of damping the resonance of the root portion of the cone-shaped member 9, and
the resonance peak due to the resonance of the root portion of the cone-shaped member 9 can
be reduced. is there. FIG. 4 shows the sound pressure peripheral frequency characteristics (solid
line) of the present embodiment, ?, @ 2? ????? The i% & ('14 ░ '11, 6 characteristics (dot
and dash line) are shown. As apparent from comparison between FIG. 4 and FIG. 1, according to
this embodiment, distortion is reduced. Example 21 As shown in FIG. 6, an adhesive adhesive or a
foamable resin adhesive 13.1i is laminated on both sides of a thin film 15 of elastic material such
as rubber etc. A cone-shaped member 9 is formed by laminating thin films 14.14 'of aluminum,
11-05-2019
2
titanium, FRP or the like. EXAMPLE 3 As shown in FIG. 6, aluminum or titanium is formed on one
side of a tacky adhesive or foamable resin adhesive 13. A cone-shaped member 9 is formed by
laminating thin films 14 such as FRP. The adhesive adhesive or the foamable resin adhesive in
each of the above embodiments may be an adhesive sheet or an adhesive layer formed by
coating. The present invention is configured as described above, and according to the present
invention, generation of distortion due to surface resonance of the cone-like member, resonance
screen due to resonance of the root of the cone-like member and the onion 7 can be reduced. It
has the advantage that flat characteristics can be obtained up to the region.
11-05-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
10 Кб
Теги
jps5796596
1/--страниц
Пожаловаться на содержимое документа