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JP2003158792

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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 JP2003158792
[0001]
TECHNICAL FIELD The present invention relates to a speaker.
[0002]
2. Description of the Related Art FIG. 5 is a partial cross-sectional view showing an example of
the structure of a conventional speaker. This speaker has a structure in which the diaphragm 6 is
fixed to the upper portion of the voice coil bobbin 10 via the sub cone 8. The diaphragm 6 and
the sub cone 8 are fixed by an adhesive 9. The sub cone 8 is fixed to the upper portion of the
voice coil bobbin 10 with an adhesive 9.
[0003]
Moreover, FIG. 6 is a fragmentary sectional view which shows the connection part of a tinsel wire
and a voice coil via the subcorn 8 shown previously. As shown in FIG. 6, the subcone 8 has two
holes 8a. The tinsel wire 14 passes through the holes 8a and 8a, and is entangled with the lead
wire 11a of the voice coil 11, and is connected to the lead wire 11a by soldering.
[0004]
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1
However, in the above-described conventional speaker, the sub cone 8 which is a separate
member is required for connection with the diaphragm 6 and the voice coil bobbin 10. As a
result, the number of parts and the number of assembling steps are increased, the cost of the
speaker is increased, and there is a problem of the quality deterioration due to the adhesion
failure of the sub cone 8.
[0005]
In addition, since the method of connecting the lead wire 11a of the voice coil 11 and the tinsel
wire 14 is complicated, there is a problem that the workability is bad.
[0006]
Therefore, an object of the present invention is to provide a high quality speaker at low cost.
Another object of the present invention is to provide a speaker having high manufacturing
workability.
[0007]
SUMMARY OF THE INVENTION In view of the above object, the present invention is a speaker
provided with a diaphragm integrally formed with a convex neck portion for connection with a
voice coil bobbin around which a voice coil is wound. It is like that.
[0008]
Further, in another aspect of the invention, in the diaphragm, the speaker has a groove on a
surface opposite to the voice coil bobbin of the neck portion.
[0009]
In another invention, a metal foil for connecting a lead wire of a voice coil is attached to a voice
coil bobbin around which a voice coil is wound, and a tinsel for flowing current to the voice coil
on the voice coil bobbin and the metal foil. A connecting member that forms a hole to connect
the wire, connects the diaphragm and the voice coil bobbin, and wraps the upper outside of the
voice coil bobbin is provided with a cutout at the position that exposes the above-mentioned hole.
The speaker has a connected structure.
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2
[0010]
According to another invention, the connecting member is a speaker having an annular neck
portion integrally formed on a diaphragm disposed on an upper portion of the voice coil bobbin.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the speaker according to the
present invention will be described below based on the drawings.
[0012]
FIG. 1 is a view showing a half cross section of an embodiment of a loudspeaker according to the
present invention.
The same reference numerals are used for the same members as those of the conventional
speaker.
The speaker according to the present invention mainly includes the magnet 1, the top plate 2, the
yoke 3, the frame 4, the diaphragm 5, the diaphragm 6 having the neck portion 7, the voice coil
bobbin 10, the voice coil 11, the dampers 12, 13 and the tinsel wire 14. , Terminal 15 and gasket
16.
[0013]
Below the voice coil bobbin 10, a voice coil 11 is wound.
Further, the lead wire of the voice coil 11 is connected to the tinsel wire 14.
The upper portion of the voice coil bobbin 10 and the diaphragm 6 are connected by the neck
portion 7 of the diaphragm 6.
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3
When a current corresponding to the voice signal flows in the voice coil 11 in the magnetic field
formed by the magnet 1, the voice coil 11 vibrates in the vertical direction, and the diaphragm 6
vibrates in the vertical direction accordingly, so that a sound is output. .
[0014]
2 is a partial enlarged cross-sectional view showing the vicinity of the neck portion 7 in FIG. 1 in
an enlarged manner. The neck portion 7 connecting the diaphragm 6 and the voice coil bobbin
10 is an annular connecting member integrally formed with the diaphragm 6. Specifically, the
neck portion 7 is formed at the lower central portion of the cone of the diaphragm 6, and the
inner diameter thereof is sized to wrap the outer diameter of the voice coil bobbin 10. The neck
portion 7 is fitted on the top of the voice coil bobbin 10 and fixed by an adhesive 17.
[0015]
As described above, since the neck portion 7 is integrally formed with the diaphragm 6, a
separate member for connecting the diaphragm 6 and the voice coil bobbin 10 is not required,
and the number of parts and the number of assembling steps can be reduced. Therefore, the
speaker is inexpensive and reliable.
[0016]
In addition, since the root of the neck portion 7 connected to the diaphragm 6 has a large
thickness, there is a risk of sink marks on the appearance during integral molding. For this
reason, in the diaphragm 6, a decorative groove (groove) 6 a is formed on the back side of the
neck portion 7 opposite to the voice coil bobbin 11. Due to the presence of the decorative
grooves 6a, no sink marks are generated when the diaphragm 6 is molded, and the appearance of
the diaphragm 6 is improved.
[0017]
FIG. 3 is a view of the connecting portion of the lead wire of the voice coil 11 and the tinsel wire
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4
14 as viewed in the direction of arrow X in FIG. FIG. 4 is a cross-sectional view taken along line
AA in FIG.
[0018]
As shown in FIGS. 3 and 4, two copper foils (metal foils) 18 are attached to a part of the voice
coil bobbin 10. In the upper portions of the voice coil bobbin 10 and the copper foil 18, holes
10a and a hole 18a through which the tinsel wire 14 connected to the copper foil 18 can pass
are formed, respectively.
[0019]
Under the copper foil 18, lead wires 11 a and 11 a of the voice coil 11 are joined by solder 21.
The copper foil 18 is covered with a reinforcing paper 19 in the vicinity of the hole 18 a in the
upper part thereof and the part excluding the soldered part in the lower part. The reinforcing
paper 19 prevents the copper foil 18 from coming off.
[0020]
On the other hand, in the neck portion 7 integrally formed with the diaphragm 6, a reverse Ushaped notch portion 7a for exposing the vicinity of the hole 18a of the copper foil 18 is formed.
The tinsel wire 14 has its tip end passed through the hole 18 a of the copper foil 18 and the hole
10 a of the voice coil bobbin 10, and is then connected with the copper foil 18 and the solder 20.
[0021]
Since the vicinity of the hole 18a of the copper foil 18 is exposed from the notch 7a, the neck
portion 7 does not get in the way when the tinsel wire 14 is connected. Therefore, the connection
of the voice coil 11 and the tinsel wire 14 is easy, and the workability can be improved.
[0022]
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5
As mentioned above, although embodiment of this invention was described, this invention is not
limited to this, various deformation ¦ transformation and application are possible.
[0023]
For example, the neck portion 7 may be connected so as to enter the inside of the voice coil
bobbin 10.
Further, the neck portion 7 may not be annular but may be a claw-like connection portion
lacking a part in the circumferential direction.
[0024]
The wire connection structure shown in FIG. 3 and FIG. 4 may be adopted for a speaker using a
conventional sub cone. Also, instead of the copper foil 18, another conductive metal foil may be
used.
[0025]
According to the present invention, high-quality speakers can be provided at low cost. Further,
according to another aspect of the present invention, it is possible to provide a speaker having
high manufacturing workability.
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