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JPS56111595

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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 JPS56111595
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half cross-sectional view of a conventional
speaker, FIG. 1 is a half cross-sectional view of a speaker according to an embodiment of the
present invention, and FIGS. 3a and 3b are main parts of the same speaker. FIG. 4 a is a plan view
and a half sectional view of a ring-shaped bobbin reinforcement. b and FIGS. 5a and 5b are plan
and half sectional views of another embodiment of the same ring-shaped bobbin reinforcement,
FIG. 6 is a plan view of a voice coil bobbin when the speaker is in operation, and FIG. It is a figure
which shows the measurement result of the output sound pressure frequency characteristic of a
speaker. 6 и и и и и и и и и и и Frame и и и и и и и и и и и и и и и и и и и и voice coil, 10 и и и voice coil bobbin, 11 и и и и и и
и и и и и и и ииииииии Magnetic gap, 14
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
ииииииииииииииииииииииииииииииииииииииииииииииииииииии ? ... engaging body.
DETAILED DESCRIPTION OF THE INVENTION The present invention provides a ring // furnace
two-like bobbin supplement on the inner peripheral surface of a voice coil bobbin to improve the
Young's modulus of the joint portion of one sheet and the voice coil bobbin from K, A speaker
having a higher high frequency limit frequency is provided. A conventional speaker will be
described. In FIG. 1, a frame 6 is coupled to a magnetic circuit 6 constructed by incorporating a
ring-shaped magnet 3 and a ring-shaped top plate 4 in a plate 2F having a center pole 1. The
peripheral portion of the diaphragm 8 is coupled to the peripheral portion of the frame 6
together with the gasket 7, and to the central portion of the diaphragm 8, a voice coil bobbin 10
having the voice coil 9 wound around is coupled. The voice coil 9 is fitted to the magnetic gap 12
of the magnetic circuit 6 without alignment, and the dust cap is placed on the central upper
surface of the diaphragm 8. 13 was pasted and constituted. In the speaker of the above
configuration, the high frequency limit frequency indicating the high sound reproduction limit of
the speaker is given by the following equation. 'R' 'akJ' '1' 1 M2 '' rTrcJ '' 1 =-(1) where f ,, =: OZ!
?????????? In the above equation (1), fR high frequency limit lI! ! Wave number, M.
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The mass of the voice coil bobbin 1o including the feeding voice coil 9, M2 is the mass of the
imaging plate 8, a is the opening angle rlsa 'of the apex angle of the root 8 the effective radius of
the imaging motion eiQ, E is The whole Young's modulus sl '(2 is the density of the diaphragm 8)
of the photographing motion @ 8 and the voice coil pohi, -10. As is clear from the above equation
(1), it can be seen that the upper limit frequency fR is increased if the overall Young's modulus E
of the moving plate 8 and the voice coil bobbin 10 is increased. That is, as the vibration & 8 and
the voice coil bobbin 1o are closer to a perfect rigid body with respect to the vibration, the
speaker can obtain good sound pressure characteristics up to a high frequency region. For this
reason, in the connection of the voice coil bobbin 10 and the diaphragm 8 in which the voice coil
9 is conventionally wound, an adhesive such as an epoxy adhesive having a high hardness of 4 is
used to make the Young heavy condition large. I worked to make the However, just bonding with
a high-hardness grafting agent kept the Young's modulus ? ? about 1.8 times that of normal
and the Ibaraki frequency 4 elongation about 1.2 times that of blowing. In the present invention,
a ring-shaped bobbin reinforcement is provided on the inner peripheral surface of the voice coil
bobbin to increase the Young's modulus at the connection portion of the voice coil bobbin and
the loss plate, and the high frequency limit frequency capable of reproducing audio signals to
higher frequency regions than K. To provide a high speaker.
Hereinafter, embodiments of the present invention will be described in detail based on the
drawings. FIG. 2 shows a half cross-sectional view of a speaker according to one embodiment of
the present invention, and the voice coil 9 will be described with the same reference numerals as
in FIG. 1 showing a conventional example. Is wound on the voice coil bobbin 10 and is collected
in the magnetic gap 12 formed between the top plate 4 and the center pole 1-1 to 1! ?????
?? On the other hand, the voice coil bobbin 1o is coupled to a central hole formed by being
punched at the central portion of the drum 11, and the voice coil bobbin 10 is in contact with the
inner diameter end of the diaphragm 8 at the top of the outer peripheral surface. A feature of this
embodiment is that a ring-shaped bobbin reinforcing member 14 formed of a metal, resin or the
like is fitted to the inner peripheral surface of the voice coil bobbin 1o. This ring-shaped bobbin
reinforcement 14 is shown in FIG. As shown in b, the ring-shaped body 14a, the cross-shaped
support body 14b supporting the ring-shaped body 14a from the inside, and the tip protruding
from the ring-shaped body 14a are bent outward in an inverted U-shape. It consists of a
memorial 14e. The ring-shaped body 14a of the ring-shaped bobbin reinforcement 14 is fitted on
the inner peripheral surface of the voice coil bobbin 1o which corresponds to the back side of the
contact portion of the diaphragm 8 and the voice coil bobbin 1o. Further, the tip end of the
engaging member 140 engages with the upper end of the voice coil bobbin 6 so that the ringshaped bobbin reinforcement 14 does not slide downward to the inner peripheral surface of the
voice coil bobbin 1o. I am doing it. As another practical example of the ring-like bobbin
reinforcement 14, as shown in FIGS. 4a and bK, one of the ring-like bodies 14a is provided with a
lattice-like support 14d5i, FIG. 6a , BK, it is conceivable to further provide a support 1 between
the lattice points facing the lattice support 1400 of FIG. The ring-shaped bobbin reinforcement
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14 with the cross-shaped support 14b shown in FIGS. 3a, 3b has the advantage of being
configured very simply and in decorative quantity. Figure 4a, b and H51 ': The grid-like support
14d shown in tla, b and the ring-like povin reinforcement 14 with the triangular clearance
support 14 have a large strength and a light weight. There is an advantage to As described above,
when the lightweight ring-shaped bobbin reinforcement 14 having a large gap is provided on the
inner peripheral surface of the voice coil bobbin 1o, the imaging motion of the imaging plate 8 is
not disturbed. In addition, the respective gaps between the supports 1aa, 1ab and 14c become air
passages during operation of the speaker, which can prevent air from being sealed in the
speaker.
Loudspeaker according to the above 11 right example: In this case, the voice coil bobbin 1o is
reinforced by the ring-shaped bobbin reinforcement 14 fitted to the inner circumferential surface
0, and the Young's modulus E becomes large. Therefore, as shown in FIG. 6, when the voice coil
bobbin 10a1 of the speaker in the present practical example is handed out, (! "We maintain the
1 form circle. -Force, 10bFi A plan view of the voice coil bobbin at the time of operation of the
conventional speaker is shown, and since imaging is performed in an elliptically deformed state,
a loss occurs to the imaging movement of the diaphragm. As described above, in the speaker
according to the present invention, the ring-shaped bobbin reinforcement is fitted to the inner
peripheral surface of the voice coil bobbin so as not to cause a deformation taking motion that
causes loss of vibration of the cone diaphragm, It is possible to faithfully reproduce even the high
frequency region. FIG. 7 is a diagram showing the measurement results of the output sound
pressure frequency characteristics of the speaker; 16 is a characteristic curve of the speaker that
does not reinforce the voice coil bobbin at all, and 816 is a high hardness contact as a
reinforcement of the voice coil bobbin. 17 is a characteristic curve of a speaker using the present
invention, and a characteristic of a speaker equipped with a ring-shaped bobbin reinforced weir
as shown in the embodiment of the 17-sleeve invention. From this figure, it can be seen that the
characteristic -17 in the speaker according to the embodiment of the present invention extends
flat to a high frequency range as compared with the MW music -16 DEG 16 in the conventional
speaker. As described above, the speaker of the present invention is simple, has excellent effects,
and is of great practical value.
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