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JPS55173693

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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
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DESCRIPTION JPS55173693
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a honeycomb block, FIG.
2 is an enlarged top view of the main part of the honeycomb block, and FIG. 3 is a perspective
view of the cut honeycomb block, FIG. Fig. 5 is a top view of a part of a honeycomb core obtained
by rotating and expanding a honeycomb block, Fig. 5 is a cross-sectional view of a state in which
a coil bobbin is attached to a diaphragm using a first core and Fig. 6 is one of the conventional
speakers. 7 and 8 are sectional views of the joint portion between the diaphragm and the edge
member of the conventional speaker, and FIGS. 9 and 10 are each an embodiment of the present
invention. FIG. 11 is a cross-sectional view of the joint portion between the diaphragm of the
speaker and the edge member, and FIG. 11 is a top view of a part of the core of '/'% of the other
embodiment of the present invention. 1
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и и Reinforcement 6, 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 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 и и и и и и
и и и и и и и и и и и и и center pole , 11 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 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 и и и и и и и и и и и и и и и и и и и и и и и Damper. ?
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker using a
diaphragm having a sampditch structure in which a surface material is bonded to a honeycomb
core material. First, a conventional speaker of this type will be described. FIG. 1 shows a
honeycomb material block. The honeycomb material block 1 is formed by laminating a large
number of metal foils or the like, and bonding adjacent metal foils with a predetermined interval
as shown in FIG. A portion of the honeycomb material block 1 shown in FIG. 1 is cut at a-a 'and
as shown in FIG. 3, when it is rotationally expanded in the b' direction, hexagonal cells as shown
in FIG. A flat plate-like honeycomb core 2 is formed. By bonding the surface materials 3 and 3 to
both surfaces of this honeycomb core 2 as shown in FIG. 5, a diaphragm 4 having a sandwich
structure is obtained. A ring-shaped reinforcing member 5 is bonded to the lower surface of the
diaphragm 4, and the coil bobbin 6 is attached to the reinforcing member 6. Reference numeral 7
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is a voice coil wound around the coil bobbin 6. The honeycomb core material may be formed by
stretching the honeycomb material block to the left and right without rotating the honeycomb
material block). Next, a speaker using the L-shaped diaphragm 4 will be described with reference
to FIG. In FIG. 6, reference numeral 8 denotes a yoke, and a center pole 9 is integrally formed at
the center of the yoke 8. An annular magnet 1o is fixed to the upper surface of the yoke 8 and an
annular yoke 11 is fixed to the upper surface of the magnet 10. The space between the inner
peripheral surface of the yoke 11 and the outer peripheral surface of the center ball 9 is An
annular magnetic gap is formed. A plate 12 is supported by the yoke 11, and the diaphragm 4 is
disposed in the hole 13 of the plate 12. The outer peripheral portion of the edge member 14 is
bonded to the upper edge of the hole 13 of the plate 12 and the inner peripheral surface of the
edge member 14 is bonded to the lower peripheral portion of the diaphragm 4. . A damper 16
supports the coil bobbin 6, and the voice coil 7 is inserted into the annular magnetic gap. As
described above, in the conventional speaker, since the bonding portion of the edge member 14
to the diaphragm 4 is the outermost peripheral surface of the lower surface of the diaphragm 4,
the vibration in the upper and lower sides of the diaphragm 4 is caused by intense vibration. The
surface material is peeled off from the honeycomb core 2 to cause abnormal vibration of the
diaphragm, resulting in distortion in characteristics. FIGS. 7 and 8 each show a cross section of
the junction between the diaphragm 4 and the edge member 14 of the conventional speaker. As
described above, in the conventional example, since the bonding portion 14 'of the edge member
14 is bonded to the outermost peripheral portion of the surface material of the upper surface
and the lower surface of the diaphragm 4, the surface material 3, 3' is as described above. There
is a defect that the honeycomb core 2 is more easily peeled off.
The present invention eliminates the above-mentioned conventional defects, and as shown in
FIGS. 9 and 10, the bonding portion 14 'of the edge member 14 and the surface material 3, 3' of
the upper or lower surface of the diaphragm 4 It is characterized in that it adheres to the inside
from the outermost periphery. That is, the maximum diameter l of the bonding portion 14 'of the
edge member 14 is made smaller than the outer diameter of the surface material 3 or the surface
material. When using a honeycomb core obtained by rotating and expanding a honeycomb
material block, as shown in FIG. 11, the outermost part of the cells 16 of the outermost
peripheral ring of the bonded portion 14 'of the edge member 14 is placed. It is preferable to
adhere to the inside from the outer peripheral vertex P. In FIG. 11, L indicates the outer diameter
of the surface material, and l indicates the maximum diameter of the bonding portion 14 of the
edge member 14. The present invention is configured as described above. According to the
present invention, peeling of the surface material can be prevented, abnormal vibration due to
peeling of the surface material can be prevented, and generation of distortion can be prevented.
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