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JP2006101202

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DESCRIPTION JP2006101202
PROBLEM TO BE SOLVED: To provide a speaker having a structure in which forming of a lead
wire which is routed from a small diameter voice coil through a main vibration part and passed
through a front surface of the main vibration part can be stabilized. SOLUTION: A diaphragm
having a ring-shaped main vibration portion 11, an inner support portion 12 supporting a radial
inner side of the main vibration portion 11, and an outer support portion 14 supporting a radial
outer side of the main vibration portion 11. 10 is a speaker provided with a large diameter voice
coil unit 55 mounted on the outer edge of the main vibrating portion 11 and a small diameter
voice coil unit 50 mounted on the inner edge of the main vibrating portion 11, the small
diameter voice coil unit 50 A predetermined length at the outer edge side end portion of the lead
wires 53a and 53b extending from the main vibrating portion 11 through the front surface of the
main vibrating portion 11 to the outer edge of the speaker in a curved shape expanding in the
front direction of the diaphragm 10 The lead wire guide portions 45a and 45b are provided to
guide them. [Selected figure] Figure 2
スピーカ
[0001]
The present invention relates to a speaker used in an audio device, and more particularly to a
speaker provided with two concentrically arranged voice coils of different diameters.
[0002]
Conventionally, a so-called double voice coil speaker provided with two voice coils has been
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proposed (see, for example, Patent Document 1).
In this type of speaker, a small diameter voice coil and a large diameter voice coil are
concentrically mounted on a diaphragm formed of paper, cloth or the like. Then, the diaphragm
is vibrated by both the small-diameter voice coil and the large-diameter voice coil to which the
audio signal is supplied, and a sound corresponding to the audio signal is generated. According
to such a speaker, it is possible to produce sounds in a wide frequency band by the small
diameter voice coil respectively receiving the sound in the relatively high frequency band and the
large diameter voice coil respectively the sound in the relatively low frequency band. It becomes.
Japanese Utility Model Publication No. 53-163120
[0003]
In the speaker having the structure as described above, the lead wire from the small-diameter
voice coil is routed through the diaphragm through the front surface of the diaphragm and
further to the outer edge of the speaker. Heretofore, there has been a risk that the lead wires
drawn around in the prior art are uneven in forming on the front surface of the diaphragm and
come in contact with the diaphragm and a protective net provided on the front surface of the
diaphragm.
[0004]
The present invention has been made to solve such conventional problems, and it is possible to
stabilize the forming of the lead wire which is routed from the small diameter voice coil through
the main vibrating portion and through the front surface of the main vibrating portion. To
provide a speaker having a possible structure.
[0005]
A speaker according to the present invention includes a ring-shaped main vibration portion, an
inner support portion supporting a radial inner side of the main vibration portion, and a
diaphragm having an outer support portion supporting a radial outer side of the main vibration
portion. A speaker comprising: a large diameter voice coil unit mounted on an outer edge of the
main vibrating portion; and a small diameter voice coil unit mounted on an inner edge of the
main vibrating portion, the small diameter voice coil unit A lead wire guiding portion for guiding
a predetermined length at the outer edge side end portion of the lead wire which penetrates the
vibrating portion and passes through the front surface of the main vibrating portion to the outer
edge of the speaker in a curved shape expanding in the front direction of the diaphragm In the
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configuration.
[0006]
With such a configuration, a predetermined length at the outer edge side end portion of the lead
wire extending from the small diameter voice coil unit through the main vibration portion of the
diaphragm through the front surface of the main vibration portion to the outer edge of the
speaker is curved Maintained.
Thus, as a result of the predetermined length at the outer edge side end portion of the lead wire
being maintained in a curved shape, the forming of the entire lead wire passing through the front
surface of the main vibrating portion in the diaphragm becomes difficult to change.
[0007]
In the speaker according to the present invention, the lead wire guiding portion may be formed
in a part of a horn ring provided on the outer peripheral edge of the speaker.
[0008]
With such a configuration, it is possible to utilize a horn ring provided in a normal speaker to
guide a predetermined length of the outer edge side end portion of the lead wire in a curved
shape.
[0009]
Furthermore, the speaker according to the present invention can be configured such that a notch
is formed in a part of the horn ring as the lead wire guide.
[0010]
With such a configuration, since the lead wire is sandwiched by the notch portion formed in a
part of the horn ring, the forming of the lead wire can be further stably maintained.
[0011]
According to the speaker of the present invention, the predetermined length of the outer edge
side end portion of the lead wire which penetrates the main vibrating portion in the diaphragm
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from the small diameter voice coil unit, passes through the front surface of the main vibrating
portion and reaches the outer edge of the speaker Is maintained in a curved shape, which makes
it difficult to collapse the entire lead wire passing through the front surface of the main vibration
portion in the diaphragm, so that the small diameter voice coil penetrates the main vibration
portion and passes through the front surface of the main vibration portion. Forming of the lead
wire routed can be stabilized.
[0012]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0013]
A speaker according to an embodiment of the present invention is configured as shown in FIG. 1
and FIG.
FIG. 1 is a plan view of the speaker as viewed from the front, and FIG. 2 is a sectional view taken
along the line A-A in FIG.
[0014]
In FIG. 1 and FIG. 2, this speaker has a yoke 20 and a diaphragm 10 integrated with the yoke 20.
The diaphragm 10 made of synthetic resin, paper, cloth or the like comprises a ring-shaped main
vibrating portion 11, a ring-shaped inner support portion 12 for supporting the radially inner
side of the main vibrating portion 11, and the main vibrating portion 11. A flat portion 13 is
formed on the inner side of the ring-shaped inner support 12, and a ring-shaped outer support
14 that supports the radially outer side.
Each cross section (refer FIG. 2) of the main vibration part 11, the inner side support part 12, and
the outer side support part 14 becomes a curved shape which protrudes on the front side of the
said speaker.
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The radius of curvature of each of the main vibration portion 11, the inner support portion 12
and the outer support portion 14 is set so as to obtain a desired sound output characteristic.
That is, the curved diameter of the main vibrating portion 11 is the largest, and the curved
diameter of the outer support portion 14 is slightly larger than the curved diameter of the inner
support portion 12.
[0015]
An inner spacer 61 formed of a synthetic resin or the like is adhered and fixed to the back
surface of the flat portion 13 located at the center of the diaphragm 10.
A convex portion 61 a is formed on the surface of the inner spacer 61 opposite to the bonding
surface to the diaphragm 10 (flat portion 13).
A ring-shaped outer spacer 62 formed of a synthetic resin or the like is bonded and fixed to the
back surface of the outermost peripheral edge portion continuing further outside of the outer
support portion 14 in the diaphragm 10. Further, the large diameter voice coil unit 55 is
attached to the back side outer edge of the main vibrating portion 11 in the diaphragm 10, and
the small diameter voice coil unit 50 is attached to the back side inner edge of the main vibrating
portion 11. The small diameter voice coil unit 50 has a structure in which the small diameter
voice coil 51 is wound at a predetermined position of the small diameter bobbin 52 having a
diameter substantially equal to the diameter of the inner edge of the main vibrating portion 11,
and one end of the small diameter bobbin 52 is mainly used. It is adhesively fixed to the back
side inner edge of the vibrating portion 11. Further, the large diameter voice coil unit 55 has a
structure in which the large diameter voice coil 56 is wound at a predetermined position of the
large diameter bobbin 57 having a diameter substantially equal to the diameter of the outer edge
of the main vibrating portion 11, One end portion 57 is adhesively fixed to the back outer edge
of the main vibrating portion 11.
[0016]
The yoke 20 made of a magnetic material has a disc-like bottom 21, a ring-shaped outer
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peripheral wall 22 standing on the outer edge of the bottom 21, and a central cylindrical portion
23 standing on the center of the bottom 21. The ring-shaped groove 24 is formed between the
central cylindrical portion 23 and the outer peripheral wall portion 22. A recess 23 a is formed
on the end face of the central cylindrical portion 23. A ring-shaped magnet 31 is provided so as
to be fixed to the bottom 21 in the groove 24 of the yoke 20, and a ring-shaped plate 32 made of
a magnetic material is fixed to the end face of the magnet 31. There is. A magnetic gap is formed
between the inner peripheral surface of the outer peripheral wall 22 opposed to each other and
the outer peripheral surface of the plate 32, and the outer peripheral surface of the central
cylindrical portion 23 opposed to each other and the inner peripheral surface of the plate 32. A
magnetic gap is formed between them. A ring-shaped diaphragm support 40 is attached to the
front outer edge portion of the outer peripheral wall 22 of the yoke 20. A ring-shaped projection
41 is formed radially inward of the support end face of the diaphragm support 40.
[0017]
The convex portion 61a of the inner spacer 61 adhesively fixed to the diaphragm 10 is fitted to
the concave portion 23a formed on the end face of the central cylindrical portion 23 of the yoke
20, and the inner edge of the outer spacer 62 adhesively fixed to the diaphragm 10 The inner
spacer 61 is adhered and fixed to the center cylindrical portion 23 of the yoke 20 and the outer
spacer 62 is adhered and fixed to the support end face of the diaphragm support 40 in a state
where the projection 41 abuts on the projection 41. The radial direction of the diaphragm 10
with respect to the yoke 20 (drawing by the fitting of the projection 61a of the inner spacer 61
with the recess 23a of the central cylindrical portion 23 and the contact of the inner edge of the
outer spacer 62 with the projection 41 of the vibration support 40 In the left and right direction,
the position is regulated. Also, the thickness of the inner spacer 61 is set so as to match the total
thickness of the outer spacer 62 and the diaphragm support 40, and the thickness of these
makes the diaphragm 10 with respect to the yoke 20 in the front-rear direction ) Regulation of
position is made.
[0018]
In the magnetic gap between the outer circumferential surface of the central cylindrical portion
23 of the yoke 20 and the inner circumferential surface of the plate 32, the small diameter voice
coil 51 of the small diameter voice coil unit 50 And the large diameter voice coil 56 of the large
diameter voice coil unit 55 is properly arranged in the magnetic gap between the inner
peripheral surface of the outer wall 22 of the yoke 20 and the outer peripheral surface of the
plate 32. Ru.
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[0019]
Furthermore, a horn ring 43 for efficiently guiding the sound generated by the diaphragm 10
forward is fixed to the diaphragm support 40 so as to sandwich the outer spacer 62.
As shown in FIG. 1, the horn ring 43 is formed with two notches 44a and 44b. The two notches
44 a and 44 b face each other across the center of the horn ring 43. One lead wire 53 a of the
small diameter voice coil 51 in the small diameter voice coil unit 50 penetrates the main
vibrating portion 11 in the diaphragm 10, passes through the front surface of the main vibrating
portion 11 and follows the curved shape of the main vibrating portion 11 Similarly, the other
lead wire 53 b of the small diameter voice coil 51 penetrates the main vibrating portion 11 and
passes through the front surface of the main vibrating portion 11 to cut the horn ring 43. It
extends toward the notch 44b (see FIG. 2).
[0020]
Lead wire guide portions 45 a and 45 b are formed in the notched portions 44 a and 44 b of the
horn ring 43. Each lead wire guide portion 45 a, 45 b has a guide surface 45 c, 45 d facing the
center of the horn ring 43. The guide surfaces 45 c and 45 d are concave (curved) concave in the
front direction of the diaphragm 10. The lead wire 53a extending toward the notch 45a reaches
the outer edge of the speaker along the guide surface 45c of the lead wire guide 44a in a state of
being sandwiched by the notch 44a (see FIG. 1). The lead wire 53b extending toward the notch
44b extends along the guiding surface 45d of the lead wire guide 45b in a state of being
sandwiched by the notch 44b (see FIG. 1) and reaches the outer edge of the speaker.
[0021]
In this manner, the predetermined lengths (the dotted oval portions in FIG. 2) at the outer edge
side end portions of the lead wires 53a, 53b leading to the outer edge of the speaker are the
guide surfaces 45c, 45d of the lead wire guiding portions 45a, 45b. By being guided along, the
curved shape expanding in the front direction of the diaphragm 10 is maintained. As a result, the
forming (shape) of each of the lead wires 53a and 53b passing through the front surface of the
main vibrating portion 11 is less likely to collapse, and the forming of each of the lead wires 53a
and 53b is stabilized. Further, since the lead wires 53a and 53b are sandwiched between the
notches 44a and 44b of the horn ring 43, the front surface of the main vibrating portion 11 is
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unlikely to fall down in the vertical direction of FIG.
[0022]
As shown in FIG. 2, on the front side of the diaphragm 10, a protective punching net 70 having a
mountain shape in cross section is mounted. The protective punching net 70 is formed by drilling
a large number of small holes in a metal plate, and is fitted to the outer peripheral surface of the
horn ring 43.
[0023]
As described above, the forming of the lead wires 53a and 53b which penetrates the main
vibrating portion 11 of the small diameter voice coil 51 from the small diameter voice coil 51
through the front surface of the main vibrating portion 11 to the outer edge of the speaker is
stabilized. Since the lead wires 53a and 53b do not easily fall down, the lead wires 53a and 53b
are prevented from contacting the protective punching net 70 mounted on the diaphragm 10
(main vibrating portion 11) or the horn ring 43.
[0024]
In the example described above, the lead guide portions 45a and 45b are formed on the horn
ring 43 provided at the outer edge portion of the speaker, but may be formed on another
member.
[0025]
As described above, the speaker according to the present invention has an effect that the forming
of the lead wire which penetrates the main vibrating portion from the small diameter voice coil
and is routed through the front surface of the main vibrating portion can be stabilized. It is useful
as a speaker provided with two voice coils of different diameters arranged concentrically.
[0026]
It is a top view of the speaker concerning an embodiment of the invention.
It is AA sectional drawing shown in FIG.
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Explanation of sign
[0027]
DESCRIPTION OF SYMBOLS 10 diaphragm 11 main vibration part 12 inner support part 13 flat
part 14 outer support part 20 yoke 21 bottom part 22 outer peripheral wall part 23 central
cylindrical part 23a recessed part 31 magnet 32 plate 40 diaphragm support body 41 protrusion
43 horn ring 44a, 44b cut Notch 45a, 45b Lead wire guide 45c, 45d Guide surface 50 Small
diameter voice coil unit 51 Small diameter voice coil 52 Small diameter bobbin 53a, 53b Lead
wire 55 Large diameter voice coil unit 56 Large diameter voice coil 57 Large diameter bobbin 61
Inner spacer 61a Convex Part 62 Outer spacer
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