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DESCRIPTION JPH0738993

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DESCRIPTION JPH0738993
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker diaphragm used in various audio equipment.
[0002]
2. Description of the Related Art Conventionally, silver paste is printed out from a terminal plate
which has a groove portion into which a voice coil is inserted and which is integrally formed, and
the end portion is a conductive adhesive at the beginning and end of winding of the voice coil.
The speaker diaphragm having the structure to be joined was configured as shown in FIG. 3 and
FIGS. 4 (a) and 4 (b).
[0003]
FIG. 3 is a perspective view showing the configuration of a conventional speaker diaphragm, FIG.
4 (a) is a sectional view of the same, and FIG. 4 (b) is a sectional view of the same.
In FIG. 3 and FIGS. 4 (a) and 4 (b), 11 is a diaphragm main body, which is called an inverted cone
type in which the central portion protrudes to the front side, and a groove 13 for inserting the
voice coil 12 in the central portion. It is provided. A silver paste wiring 14 is printed along the
diaphragm main body 11 from the terminal board 16 along the diaphragm main body 16, and
the end of the silver paste wiring 14 is the groove portion. The beginning and end of the voice
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coil 12 fitted in 13 are respectively bonded using a conductive adhesive 15 to constitute a
speaker diaphragm.
[0004]
However, in the speaker diaphragm of the above-described conventional configuration, bending
occurs on the top circumference of the diaphragm main body 11 which intersects the outer
peripheral wall of the groove portion 13 into which the voice coil 12 is fitted, Accordingly, there
is a problem that the conductive adhesive 15 is cracked to cause disconnection. Furthermore, the
conductive adhesive 15 is difficult to be embedded in the upper portion of the groove 13 into
which the voice coil 12 is inserted, which causes a problem of conduction failure.
[0005]
[Means for Solving the Problems] In order to solve such problems, the speaker diaphragm
according to the present invention has a notch concave portion in which a part on the outer
peripheral side of a groove portion into which a voice coil is inserted is cut away to form a flat
portion. The voice coil is radially provided, and a conductive adhesive is applied to the notched
concave portion to join the start and end of the voice coil with the silver paste wiring from the
terminal board.
[0006]
According to this configuration, the end of the silver paste wiring printed on the upper surface of
the diaphragm main body can wrap around and approach to the start end of the voice coil
inserted in the center of the inverted cone type diaphragm main body, In order to prevent the
bending at the intersection of the outer peripheral wall of the groove and the diaphragm body in
which the flat portion and the side wall surface of the notched recess engage with the voice coil
while the electric bonding force by the conductive adhesive is increased. It will play a reinforcing
role, and it is possible to prevent the occurrence of cracks in the conductive adhesive applied to
the junctions of the wiring.
[0007]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A loudspeaker diaphragm
according to an embodiment of the present invention will be described below with reference to
FIGS. 1, 2 (a) and 2 (b).
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2
[0008]
FIG. 1 is a perspective view showing the configuration of a speaker diaphragm according to the
same embodiment, FIG. 2 (a) is a cross-sectional view thereof, and FIG. 2 (b) is a cross-sectional
view of the same.
[0009]
In FIG. 1 and FIGS. 2 (a) and 2 (b), reference numeral 1 denotes a diaphragm main body, which is
called an inverted cone type in which a central portion protrudes to the front side. A groove
portion 3 for inserting a voice coil 2 in the central portion. Is provided.
Notches 6 are radially provided on the outer peripheral side of the groove 3, and the notch 6
forms a flat portion from the groove 3 of the diaphragm main body 1 toward the periphery as
shown in FIG. 2 (b). It is like that.
A terminal plate 7 is integrally formed on the outer periphery of the diaphragm main body 1, and
silver paste wiring 4 is printed from the terminal plate 7 to the notch recess 6 along the
diaphragm main body 1 and the silver paste wiring The starting end of the voice coil 2 inserted
into the groove 3 is drawn out and disposed in the notch recess 6 serving as the end of 4 and is
joined using the conductive adhesive 5.
[0010]
As described above, according to the speaker diaphragm of the present invention, the silver paste
wiring printed on the upper surface of the diaphragm main body is formed by providing the
notched concaves radially on the outer peripheral upper portion of the groove for inserting the
voice coil. The end of the coil can be extended to the notch recess to make it close to the
beginning of the voice coil, and the electric bonding force by the conductive adhesive is
enhanced, and at the same time the flat portion and the sidewall surface of the notch recess
make the voice coil It acts as a reinforcement to prevent the bending at the intersection of the
outer peripheral wall of the inserted groove and the diaphragm main body, and it breaks without
causing a crack in the conductive adhesive applied to the junction of the wiring. Can be
prevented, and a highly reliable speaker diaphragm can be realized.
[0011]
Brief description of the drawings
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[0012]
1 is a perspective view showing a configuration of a speaker diaphragm in one embodiment of
the present invention
[0013]
FIG. 2 (a) is a cross-sectional view showing the configuration of the speaker diaphragm in the
embodiment.
[0014]
3 is a perspective view showing the configuration of a conventional speaker diaphragm
[0015]
FIG. 4 (a) is a cross-sectional view showing the configuration of a conventional speaker
diaphragm
[0016]
Explanation of sign
[0017]
1 diaphragm body 2 voice coil 3 groove 4 silver paste wiring 5 conductive adhesive 6 notched
recess 7 terminal plate
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