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DESCRIPTION JP2003153377

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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 JP2003153377
[0001]
The present invention relates to a novel loudspeaker. More specifically, the present invention
relates to a technology that makes it possible to use a large diaphragm for the outer diameter.
[0002]
2. Description of the Related Art An example of a conventional speaker is shown in FIGS.
[0003]
The speaker a is formed by supporting the required parts and members on the frame b.
The outer periphery of the diaphragm c is supported by the front end face of the frame b via an
edge d. Further, a voice coil (not shown) is coupled to the inner periphery of the diaphragm c,
and a magnetic circuit portion for forming a magnetic field necessary for driving the voice coil is
supported on the frame b.
[0004]
At the front end of the frame b, an inwardly projecting flange portion e is formed, and an edge d
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is supported by adhesion or the like on the front surface of the flange portion e. Then, a gasket f
is attached by adhesion or the like at a position outside the portion of the front surface of the
flange portion e where the edge d is supported.
[0005]
When the speaker a is mounted at a predetermined mounting position, the frame b is fixed at the
rear end, and the front end is abutted against the predetermined abutment via the gasket f. .
[0006]
By the way, in the above-mentioned conventional speaker a, it is necessary to support the gasket
f as well as the edge d on the front surface of the flange e provided at the front end of the frame
b. A space for supporting the gasket f must be provided on the outside of the point where the d is
supported.
Therefore, there is a problem that the outer diameter of the front end of the frame b is increased
by the space for supporting the gasket f.
[0007]
In the case of a speaker mounted in a limited space such as the interior of a car, the maximum
size is limited. For example, when the size of the front end of the speaker is limited, the size of
the front end, that is, the outer diameter of the front end is limited.
[0008]
In the above-described conventional speaker a, the maximum outer diameter of the front end of
the frame b is defined by the space condition of the mounting portion. Under such conditions, the
mounting surface of the gasket f must be provided on the outside of the mounting surface of the
edge d, and therefore the outer diameter of the diaphragm c must be reduced by the size of the
mounting surface of the gasket f. I can not get it.
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[0009]
The characteristics of the speaker depend largely on the size of the diaphragm, and the larger the
diaphragm is, the more the frequency characteristics are expanded, and the sound pressure is
improved. As a result, the sound quality is improved. However, in the above-described
conventional speaker a, since the gasket f is attached at the same flange portion e as the edge d,
the outer diameter of the diaphragm c must be reduced to secure the attachment surface of the
gasket f. The
[0010]
Then, this invention makes it a subject to use a big diaphragm for the outer diameter in the
speaker with which the largest outer diameter is limited.
[0011]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the speaker
according to the present invention has a flange for edge supporting an edge at the tip of the
frame and a flange for edge at the front of the flange for edge. And a gasket flange portion
positioned so as to overlap at least partially in the front-rear direction, and the gasket is
supported by the gasket flange portion.
[0012]
Therefore, since the gasket flange portion for supporting the gasket is provided on the front side
of the edge flange portion supporting the edge, the outer diameter at the edge mounting portion
is increased due to the mounting of the gasket. Therefore, when the outer diameter is the same
as that of the conventional speaker, a diaphragm having an outer diameter larger than that of the
conventional speaker can be used.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the speaker according to the
present invention will be described below with reference to the attached drawings.
[0014]
1 to 3 show a first embodiment of the speaker of the present invention.
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[0015]
The speaker 1 is provided with a substantially cylindrical frame 2, and a required member is
supported by the frame 2.
The frame 2 has a tapered shape in which the diameter of the rear end is slightly larger than the
diameter of the front end, and the mounting flange portion 3 protrudes outward at the rear end.
Further, two flange portions 4 and 5 are provided to project inward at the front end portion of
the frame 2 so as to be separated longitudinally.
The front one 4 of the two flanges 4 and 5 is a gasket flange, and the rear one 5 is an edge
flange.
The frame 2 is formed, for example, by integrally forming the flange portions 3, 4 and 5
described above as a resin molded product.
[0016]
The outer peripheral portion of the diaphragm (corn paper) 7 is supported by the edge flange
portion 5 of the frame 2 via the edge 6.
The diaphragm 7 is formed in a conical shape, and the front end portion of the substantially
cylindrical coil bobbin 8 is connected to the inner peripheral portion. A voice coil 9 is wound
around the coil bobbin 8. The coil bobbin 8 is supported by the damper 10 on the frame 2.
[0017]
The magnetic circuit unit 11 is supported by the frame 2. The magnetic circuit unit 11 is
composed of a magnet 12 and a bottom plate 13 and a top plate 14 which are each formed of a
magnetic material. The bottom plate 13 has a center pole 13b projecting forward from a central
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portion of a disk-like rear surface 13a, and a ring-shaped magnet 12 is fixed to the front of the
rear surface 13a. Further, a ring-shaped top plate 14 is fixed to the front surface of the magnet
12. The center pole 13b is positioned inside the top plate 14, and a gap 15 is formed between
the inner circumferential surface of the top plate 14 and the outer circumferential surface of the
center pole 13b, and the gap 15 is used as a gap. .
[0018]
Then, the magnetic circuit unit 11 is fixed to the inside of the frame 2, and the voice coil 9 is
positioned in the gap 15 of the magnetic circuit unit 11.
[0019]
Then, when an electric signal is applied to the voice coil 9, a driving force is generated in the gap
15, that is, the voice coil 9 which is a conductor through which a current flows in the magnetic
field, and the driving force is transmitted to the diaphragm 7. The diaphragm 7 vibrates and
emits sound according to the vibration.
[0020]
A gasket 16 made of an elastic material such as rubber, synthetic rubber, or foamed resin such as
urethane foam is fixed to the front surface of the gasket flange 5 by adhesion or the like.
[0021]
The attachment of the speaker 1 will be described with reference to FIG. 3 by taking, for example,
the case of attachment to a door of a car.
[0022]
The door 17 of a car is formed by arranging an inner plate 20 as a structural member between a
door trim 18 on the indoor side and an outer plate 19 on the outer side, and a door glass
between the outer plate 19 and the inner plate 20 at the upper end. An opening 22 is formed for
the passage of 21.
Then, a mounting hole 23 for allowing the speaker 1 to face the room is formed in the door trim
18, and a grill 24 having a large number of small holes is mounted so as to cover the mounting
hole 23.
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The mounting flange 3 formed at the rear end of the frame 2 of the speaker 1 is screwed to the
inner plate 20, and the gasket 16 fixed to the front of the gasket flange 4 of the frame 2 is grilled
at the front end. It abuts on the peripheral edge of 24.
[0023]
In the speaker 1 described above, the flange portion 4 for attaching the gasket 16 is provided
separately from the flange portion 5 for attaching the edge 6, and the gasket flange portion 4 is
provided on the front side of the edge flange portion 5 It is not necessary to provide a space for
arranging the gasket 16 on the outside of the edge 6 because at least a part of the frame 6 is
arranged to overlap when viewed from the front, and accordingly, if the frame 2 has the same
external dimensions The external dimensions of the edge 6 can be increased as compared with
the above, so that the external dimensions of the diaphragm 7 can also be increased.
By enlarging the outer diameter of the diaphragm 7, the frequency characteristic is expanded
and the sound pressure is also improved, and as a result, the sound quality is improved.
[0024]
FIG. 4 shows a second embodiment of the speaker of the present invention.
[0025]
The loudspeaker 1A according to the second embodiment is different from the loudspeaker 1
according to the first embodiment in that the frame 25 has a two-piece structure, ie, a so-called
two-piece structure.
The other parts are the same as those in the speaker 1 according to the first embodiment
described above, and therefore the same parts are the same as the reference numerals given to
the similar parts in the speaker 1 according to the first embodiment. It attaches a code | symbol
and abbreviate | omits description.
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[0026]
The frame 25 comprises a substantially cylindrical frame main portion 26 and a frame front
portion 27 coupled to the front end of the frame main portion 26.
The frame main portion 26 is formed in a gentle taper so that the diameter of the rear end is
slightly larger than the diameter of the front end, and an inwardly projecting edge flange portion
28 is integrally formed at the front end of the frame main portion 26 Also, at the rear end of the
frame main portion 26, an outwardly projecting mounting flange portion 29 is integrally formed.
[0027]
The frame front portion 27 is formed in a substantially cylindrical shape with a short axial
(longitudinal) length, and is formed in a tapered shape so that the diameter of the rear end is
slightly larger than the diameter of the front end. Further, the inner diameter of the rear end
portion is formed to be substantially the same as the outer diameter of the front end portion of
the frame main portion 26 so that the frame front portion 27 can be externally fitted with the
rear end portion to the front end portion of the frame main portion 26 There is. A gasket flange
30 projecting inward is integrally formed at the front end of the frame front portion 27.
[0028]
The edge 6 attached to the outer peripheral portion of the diaphragm 7 by adhesion or the like is
attached to the front surface of the edge flange portion 28 of the frame main portion 26 by
means such as adhesion or the like. The portion 11 is supported, and the portion around which
the voice coil 9 of the coil bobbin 8 coupled to the inner peripheral portion of the diaphragm 7 is
wound is positioned in the gap 15 of the magnetic circuit portion 11.
[0029]
Further, the gasket 16 is attached to the front surface of the gasket flange portion 30 of the
frame front portion 27 by means such as adhesion.
[0030]
Then, the frame front portion 27 is externally fitted to the front end portion of the frame main
portion 26 on which the diaphragm 7 and the magnetic circuit portion 11 are supported,
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whereby the speaker 1A is formed.
[0031]
As means for externally fitting the frame front portion 27 to the front end portion of the frame
main portion 26, various means such as screwing, engagement with engaging claws, welding
such as ultrasonic welding, etc. can be considered, but are particularly limited. It is not something
to be done.
[0032]
Even in the speaker 1A according to the second embodiment, the flange portion 30 for attaching
the gasket 16 is provided separately from the flange portion 28 for attaching the edge 6, and the
gasket flange portion 30 is Since at least a part of the front flange portion 28 is arranged so as to
overlap with each other when viewed from the front, there is no need to provide a space for
arranging the gasket 16 on the outside of the edge 6. In the case of the same, it is possible to
make the outer dimensions of the edge 6 larger as compared with the prior art, and hence the
outer dimensions of the diaphragm 7 can also be made larger.
By enlarging the outer diameter of the diaphragm 7, the frequency characteristic is expanded
and the sound pressure is also improved, and as a result, the sound quality is improved.
[0033]
Further, in the speaker 1A according to the second embodiment, although the frame 25 is formed
of two members and the number of parts is increased, a special jig is not required for attaching
the edge 6, and the manufacturing process It can be simplified.
[0034]
On the other hand, in the speaker 1 according to the first embodiment described above, since the
edge flange portion 5 is located behind the gasket flange portion 4, a dedicated repair for
attaching the edge 6 is performed. For example, a pressing jig whose tip is enlarged in a tapered
shape is used, or the entire circumference of the edge 6 is pressed against the edge flange 5 by a
roller while pressing several places of the edge 6 against the edge flange 5 Require a special
process such as activating and bonding a pressure-activated adhesive, which complicates the
manufacturing process somewhat, but the frame 2 can be made of a single member, and parts
The score can be reduced.
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[0035]
Therefore, when the speaker 1 according to the first embodiment and the speaker 1A according
to the second embodiment are properly used according to the respective applications, the
respective features can be exhibited without a failure.
For example, in the case of a speaker with a relatively small amount of production, by applying
the speaker 1A according to the second embodiment, a large-scale production facility is not
required and it is suitable for small-lot, multi-variety production.
On the other hand, in the case of mass production, by applying the speaker 1 according to the
first embodiment, it is possible to absorb the cost of production equipment by reducing the cost
of parts and to provide an inexpensive speaker. Becomes possible.
[0036]
The specific shapes and structures of the respective parts shown in the above-described
embodiment are merely examples of the embodiment to be carried out in practicing the present
invention, and the technical scope of the present invention can be obtained by these. It should
not be interpreted restrictively.
[0037]
As is apparent from the above description, according to the speaker of the present invention, the
frame supporting the magnetic circuit portion, the voice coil, the inner periphery is coupled to
the voice coil and the outer periphery is the frame. A speaker provided with a diaphragm
supported at an end portion via an edge, the edge flange portion supporting the edge at the end
portion of the frame and the edge flange at the front side of the edge flange portion And a gasket
flange portion positioned so as to overlap at least partially in the front-rear direction, and the
gasket is supported by the gasket flange portion.
[0038]
Therefore, since the gasket flange portion for supporting the gasket is provided on the front side
of the edge flange portion for supporting the edge, the outer diameter at the edge mounting
portion becomes large due to the mounting of the gasket. Therefore, when the outer diameter is
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the same as that of the conventional speaker, a diaphragm having an outer diameter larger than
that of the conventional speaker can be used, and the sound quality can be improved.
[0039]
According to the second aspect of the present invention, since the flange portion for the edge and
the flange portion for the gasket are integrally formed on the frame, the number of parts can be
reduced and the cost can be reduced.
[0040]
In the invention described in claim 3, the frame is formed by combining the frame main portion
with the flange for the edge separately formed and the frame front with the flange for the gasket.
Therefore, the diaphragm supporting step can be simplified by supporting the diaphragm on the
edge flange portion via the edge and then coupling the frame front portion to the frame main
portion.
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