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JPS5652393

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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 JPS5652393
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view showing a conventional
speaker, FIG. 2 is a half sectional view showing one embodiment of the present invention, and
FIG. 3 is an enlarged sectional view of the main part in the same manner. FIG. 5 is a half sectional
view showing another embodiment of the present invention, FIG. 5 is an enlarged sectional view
of the main part of the same, and FIG. 6 is a chart showing frequency characteristics of the
speaker of the present invention. DESCRIPTION OF SYMBOLS 1 ... Voice coil bobbin, 2 ...
Diaphragm, 3 ... Reinforcement member, 3a, 3b ... Bonding surface, 4 ......... Adhesive agent.
DETAILED DESCRIPTION OF THE INVENTION In the present invention, a voice coil bobbin and a
diaphragm are joined to a speaker joined using a roughly 7-g reinforcing member.
Conventionally, in order to join the voice coil hoof / and the diaphragm, for example, as shown in
FIG. 1, the adhesive C is used as shown in FIG. Was. In this case, if the Young's modulus of the
diaphragm B is larger than that of the adhesive C, the vibration from the voice coil is faithfully
transmitted to the diaphragm and the high frequency limit frequency is lowered, and the
frequency characteristic has a large resonance time. It has been known. In order to increase the
upper limit frequency, it is necessary to lighten the purchase of the diaphragm and voice coil,
and to use a material with a high Young's modulus as the material of the diaphragm to reduce
the semi-apical angle, etc. . The present invention has been made in view of the above-described
points, and the purpose of the present invention is to increase strength by bonding a reinforcing
member to the joint of the voice coil povin and the diaphragm. It is an object of the present
invention to provide a speaker capable of achieving good reproduction by raising the high
frequency limit frequency and lowering the resonance frequency in the frequency characteristic.
An embodiment of the invention will now be described with reference to FIGS. 2 and 3. 1 is a
voice coil bobbin and 2 is a diaphragm. A ring 3 is formed of aluminum and has a bonding
surface 3a to the voice coil bobbin 1 at its inner periphery and a bonding surface 3b having an
inclination angle substantially coincident with the taper surface of the diaphragm 2 such as a
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cone at its upper edge. The diaphragm 2 is added to the voice coil bobbin 1 using the reinforcing
member 3 and the reinforcing member 3 is in contact with the joint portion between the voice
coil bobbin 1 and the diaphragm 2 in the crucible, and the reinforcing member Joining to the
inner circumference of 3 and bonding to the Heus coil bobbins / 1 ff 1 B & * If it is peeled off on
the bonding surface 3 b with the diaphragm 2 provided on the upper edge of the reinforcing
member 3, the acrylic adhesive 4 is cast in The diaphragm 2 is bonded to the voice coil bobbin 1.
In this case, the bonding surface 3b of the reinforcing member 3 is bonded in advance to the
lower surface and the inner periphery of the diaphragm 2 with the adhesive 4. Thereafter, the
bonding surface 3 of the reinforcing member 3 is attached to the voice coil bobbin 1 using the
adhesive 4. The diaphragm 2 may be attached to the voice coil bobbin 1 by bonding, or the
diaphragm 2 may be bonded to the voice coil bobbin 71 in advance, and the diaphragm 2 may be
bonded to the voice coil bobbin 1 later. Reference numeral 5 denotes a damper material for
supporting the voice coil bobbin 1 by bonding it to the inner peripheral edge of the reinforcing
member 3 using an adhesive 4. Further, the Young's modulus of the reinforcing member 3 is
approximately the same size as the diaphragm 2 or larger, for example, the Young's modulus of
the diaphragm 2 is about rx 1 o′′N / m ′ and the Young's modulus of the reinforcing
member 3 is 7 × 1 ON / m ′ ′ The Young's modulus when an acrylic resin is used as the
adhesive 4 is about 2.5 × 10 ′ ′ N / m ′.
6はボイスコイルである。 In one embodiment of the present invention, the voice coil bobbin 71
is formed by bonding the bonding portion between the voice coil bobbin 1 and the diaphragm 2
with the adhesive 4 by using the reinforcing member 3 as shown in FIG. The stiffness at the joint
between the diaphragm and the diaphragm 2 is increased, and the high frequency band limit
frequency is simply adhered to the voice coil bobbin 1 using the adhesive 4 and made higher
than that of the conventional speaker shown in FIG. And the vibration of the voice coil 6 can be
transmitted to the moving plate 2 faithfully. That is, the speaker of FIG. 11 simply adhered to
voice coil bobbin 1 using adhesive 4, the speaker of this embodiment, and the same as the
embodiment of the present invention in which one pair of reinforcing member 3 is similarly
weighted. As is apparent from the diagram of FIG. 6 in which the frequency characteristics of the
loudspeakers are shown by dotted lines, solid lines, and phantom lines, the loudspeaker of this
embodiment is shown as a solid line rather than the conventional loudspeaker shown in FIG. The
resonance peak of the frequency response rises by about 2/3 octave, and the level is low. In
addition, as shown in the figure, when the weight of the reinforcing member 3 is also heavier
than that of the speaker indicated by the solid line, the level of the resonance peak is lower than
that indicated by the solid line. There is also a 9-width wide, flatter frequency characteristic. In
the case where the reinforcing member 3 is formed of a steel sheet metal having a high thermal
conductivity, the heat transmitted from the voice coil 6 to the Heuss coil hovin 1 is dissipated,
and the value of the voice coil 6 is increased. Can. FIGS. 4 and 5 show another embodiment of the
present invention, which is different from the embodiment shown in FIGS. 2 and 3 in the present
embodiment. The difference is in the fact that the stiffness of the joint between the voice coil
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bobbin 1 and the diaphragm 2 is further increased due to the thick formation, and the difference
is only K, and the resonance peak of the frequency characteristic is the same as in the previous
embodiment. Since the level can be reduced and the high frequency characteristic can be
extended. Although the reinforcing member 3 has a ring shape in each of the above
embodiments, it is needless to say that the reinforcing member 3 may be divided into several
pieces and formed in a ring shape as a whole. As described above, in the present invention, since
the reinforcing member is applied to the junction of the voice coil bobbin and the diaphragm, the
stiffness of that portion is increased, and the high frequency 1 and J1 limit frequency are
increased, and the frequency characteristic Since the resonance peak in can be lowered, good
power can be regenerated.
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