close

Вход

Забыли?

вход по аккаунту

?

JPS55115795

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 JPS55115795
Description 1, title of the invention
スピーカ
3. Detailed Description of the Invention The present invention relates to a speaker made of fiber
reinforced resin, and more particularly to a speaker with excellent frequency characteristics.
Conventionally, one of the main characteristics of a loudspeaker is required to have a high value
of S (where E is the Young's modulus of the cone and ρ is the density of the ρ cone). This
means that the original sound is reproduced faithfully to the acoustic signal supplied to the voice
coil, and the higher the Eyp value, the larger the piston area in the magnetic field of the coil
bobbin cone corresponding to the acoustic signal. However, a speaker provided with a cone made
from pulp fiber can not obtain a sufficient value, and on the other hand, a fiber reinforced resin
using carbon fiber or glass fiber as a reinforcing material, which is said to be an improved
product of such a pulp fiber made speaker Even in the case of using a speaker made of a cone,
although the Byp value has been improved temporarily, faithful reproduction of the original
sound is required over a wider frequency range. Therefore, the inventors of the present invention
have a speaker system to further increase the value of the fiber reinforced resin speaker system.
Focusing on the fact that the value is mainly governed by the arrangement of reinforcing fibers
in the direction of the ridgeline of the cone, and considering the relationship between the resin
forming the cone and the reinforcing fibers, the present invention was completed. The present
invention aims to expand the piston area of a coil bobbin-cone by increasing the η value in the
direction of the ridgeline of the speaker cone, and provides a speaker with excellent frequency
characteristics that can reproduce the sound more faithfully to the original sound. It is EndPage:
1 In order to achieve the above object, the speaker of the present invention is joined to a
magnetic circuit, 7 cylindrical coil bobbins disposed in the magnetic circuit, a voice coil wound
10-05-2019
1
around the coil bobbin, and one end of the coil bobbin And a cone made of a fiber-reinforced
resin, and at least 60 volumes of reinforcing fibers of the fiber-reinforced resin are disposed in
the ridge line direction of the cone. As described above, the value of the speaker is mainly
governed by the arrangement of fibers in the direction of the ridge of the cone, but it is not only
this, but it can be said that the so-called synergistic effect of the resin forming the cone and the
arrangement of reinforcing fibers . Therefore, in the fiber reinforced resin cone of the speaker
according to the present invention, the ratio of the reinforcing fibers disposed in the direction of
the ridge of the cone is determined by taking into consideration the effect of the resin on rho of
the speaker. It was revealed that the arrangement in the direction of the ridgeline of at least 60
body volume cones significantly contributes to the increase of the E / p value in the speaker
having the fiber reinforced resin cone.
That is, when arranged in the ridge line direction of the cone of at least 60 volumes of
reinforcing fibers of the fiber reinforced resin, the Young's modulus of the cone line direction
increases, and as a result, the value of the cone line direction is the circumferential direction (7) E
/. The increase relative to the value resulted in an enlargement of the coil area of the coil bobbin
cone. Here, the resin used for the cone used in the speaker of the present invention is a
thermosetting resin such as epoxy resin and unsaturated polyester resin, a thermoplastic resin
such as polyester resin and polyamide resin, preferably epoxy resin and unsaturated polyester It
is a thermosetting resin such as a resin, more preferably an epoxy resin. The reinforcing fiber is
usually an organic high elastic fiber such as glass fiber, carbon fiber or polyaramite for
reinforcing fibers arranged in the ridge direction of the cone, preferably carbon fibers. In
addition, glass fibers, carbon fibers, or organic highly elastic fibers such as polyaramite can be
appropriately used as the fibers disposed in the circumferential direction. Next, an embodiment
of a speaker according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic longitudinal sectional view of the loudspeaker according to the present
invention, in which a magnetic circuit is formed by the yoke 1, the magnet 2 and the pole piece
ridge, the cylindrical coil bobbin 4 is disposed in this magnetic circuit, The coil 5 is wound. A
cone 6 made of fiber reinforced resin is joined to one end of the coil bobbin 4. The end of the
cone 6 is supported by the damper 7 on the frame 8, and the coil bobbin 4 is also supported by
the damper 9 on the frame 8. Molding of a cone by fiber reinforced resin is usually performed as
follows. First, in accordance with the dimensions of the cone, a fan-shaped flat plate made of fiber
reinforced resin as shown in the developed view of FIG. 2 is prepared. FIG. 2 is a transparent
view of the fiber arrangement 10 in the ridge direction of the cone and the fiber arrangement 11
in the circumferential direction of the cone in order to clarify the arrangement of reinforcing
fibers. The fibers may be oriented in the same manner as in the other parts of the sheath portion
12, and they are joined with an adhesive to form a cone shown in FIG. Alternatively, the fanshaped end can be directly joined to the other end without providing a margin. Alternatively, a
circular flat plate having a fiber arrangement as shown in FIG. 2 may be prepared and the
necessary part may be punched out, instead of directly producing a fan-like shape as shown in
10-05-2019
2
FIG. In the speaker according to the present invention described above, by disposing at least 60
body volume of the reinforcing fiber of the fiber reinforced resin in the ridge direction of the
cone, the / p value in the ridge direction of the cone is improved and the piston region of the coil
bobbin cone Was expanded, and a speaker excellent in frequency characteristics was obtained.
4. Brief description of the drawings Fig. 1 is a longitudinal sectional view showing an
embodiment of the speaker according to the present invention, and Fig. 2 is a perspective
developed view showing an example of a fiber arrangement of cones used in the speaker
according to the present invention. FIG. 3 is a transparent perspective view of such a cone. 4 ...
coil bobbin, 5 ... voice coil, 6 ... EndPage: 2 cones, 10 · ridge direction array reinforcing fibers, 11
circumferential direction array reinforcing fibers. Agent Patent Attorney Kouse Nobe-Patent
Attorney Noguchi Kensuke Figure 1 EndPage: 3
10-05-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
jps55115795
1/--страниц
Пожаловаться на содержимое документа