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JP2002247691

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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 JP2002247691
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device, and more particularly to a bonding structure of a damper portion and a
diaphragm portion of the speaker device.
[0002]
2. Description of the Related Art FIG. 9 shows a partial side cross section of a conventional
general speaker, and its configuration will be schematically described. The speaker diaphragm
(hereinafter referred to simply as the diaphragm) 1 is formed to have a frusto-conical shape in
appearance and has a radial center (a portion corresponding to the upper surface of the frustoconical shape; the lower end in FIG. An opening 10 is provided on the side). Then, the cylindrical
voice coil bobbin 2 is positioned in the opening 10, and the circular opening edge 11 forming the
opening 10 and the side surface 2a of the voice coil bobbin 2 are brought into contact with each
other. Thereby, the motion of the voice coil bobbin 2 is transmitted to the diaphragm 1.
[0003]
Further, between the side surface portion 2 a of the voice coil bobbin 2 and the frame 4, a
damper 5 for interposing the vibration in the vertical direction to the voice coil bobbin 2 and
restricting the position of the voice coil bobbin 2 is interposed. Furthermore, a cap 6 is provided
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on the inner surface side of the diaphragm 1 to cover the upper end surface of the voice coil
bobbin 2.
[0004]
In such a speaker, the shapes of the damper 5 and the edge 3 will be described with reference to
FIGS. 10 and 11. In this figure, the damper 5 is provided with an opening at its center, and an
elastic portion is provided between the opening and the outer peripheral edge. At the edge of the
opening, a voice coil mounting portion for fixing the voice coil bobbin 2 is provided.
[0005]
The voice coil attachment portion is deformed along the side wall surface of the voice coil bobbin
2 when it is bonded to the voice coil bobbin 2 and is provided so as to face the voice coil 7 side
which is the lower side. Then, an adhesive is interposed between the voice coil attachment
portion and the voice coil bobbin 2 to planarly bond the voice coil attachment portion and the
side wall surface of the voice coil bobbin 2. Further, adhesion of the outer peripheral side of the
damper 5 to the frame 4 is performed by planarly bonding the front surface of the frame 4 and
the damper adhesive portion on the back surface of the outer peripheral edge portion of the
damper 5 with an adhesive.
[0006]
Further, as shown in FIG. 11, the ring-shaped edge 3 made of an elastic member such as rubber,
for example, is formed such that the edge on the opening side is directed downward, so that the
diaphragm 1 is easily adhered. There is. Further, in the bonding of the edge 3 and the frame 4 as
well as in the case of the damper 5 described above, the surface of the frame 4 and the edge
bonding portion of the outer peripheral edge back surface of the edge 3 are planarly bonded by,
for example, an adhesive. It is done by.
[0007]
As described above, the voice coil attachment portion and the damper bonding portion of the
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damper 5 and the edge bonding portion of the edge 3 are planarly bonded with an adhesive.
Therefore, when the input by the speaker device due to the sound or external impact is large,
peeling easily occurs in the bonding surface between the damper 5 and the frame 4, the damper
5 and the voice coil bobbin 2, and further the edge 3 and the frame 4. ing. When such peeling
occurs, it leads to problems such as the deterioration of sound quality and the failure of the
speaker device. Therefore, there is a demand for a speaker device whose input resistance is
improved by the improvement of the adhesive strength of the adhesive surface described above.
[0008]
In the speaker disclosed in Japanese Patent Application Laid-Open No. 9-224298, a cut is
provided at the opening edge of the damper, and the cut is used to increase the contact area,
thereby attempting to improve the bonding strength. However, such a speaker still has flat
contact and improves the adhesive strength between the damper and the voice coil bobbin, so
that the input resistance between the damper and the frame or between the edge and the frame
is improved. The problem has not been solved.
[0009]
The present invention has been made based on the above-described circumstances, and the
object of the present invention is to realize a speaker device having improved input resistance
between a damper and a frame or a voice coil bobbin, an edge and a frame, and the same. To
provide a damper and an edge for
[0010]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the speaker
device of the present invention is a speaker device in which a voice coil bobbin is supported via a
damper joined to a frame. A damper center side concavo-convex portion having concavities and
convexities is formed in the normal direction of the joint surface to which the voice coil bobbin is
joined, and the joint surface of the voice coil bobbin to which the damper is joined is also
directed in the normal direction of the joint surface. The bobbin side concavo-convex fitting part
which has the concavo-convex is formed, these damper center side concavo-convex part and the
bobbin side concavo-convex fitting part are made to fit, both are joined, and the joint surface
between damper bobbins is formed. The
[0011]
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When joining a damper and a voice coil bobbin by doing in this way, first, it aligns and fits a
damper center side concavo-convex part and a bobbin side concavo-convex fitting part.
At the same time as or after the fitting, if, for example, an adhesive material is applied to the
bonding surface between the damper and the bobbin formed by both of them, the damper center
side uneven portion and the bobbin side uneven fitting portion As the bonding area increases due
to the unevenness, displacement in the circumferential direction is prevented and bonding is
performed firmly.
Thus, the input resistance is improved by the damper and the voice coil bobbin being firmly
joined. In addition, even when there is a strong input, it is possible to make it difficult to cause
peeling of the two, and to provide a speaker device in which the product life is extended.
[0012]
A speaker device according to another aspect of the present invention is the speaker device in
which the voice coil bobbin is supported via the damper joined to the frame, wherein the outer
peripheral edge portion of the damper is directed in the normal direction of the joining surface
joined to the frame The damper outer peripheral side uneven portion having the uneven portion
is formed, and the frame side damper concave and convex fitting portion having the uneven
portion in the normal direction of the joint surface is also formed on the joint surface of the
frame to which the damper is joined. These damper outer peripheral side concavo-convex part
and the concavo-convex fitting part for frame side dampers are made to fit, and both are joined,
and it was decided that the joint surface between damper frames is formed.
[0013]
When joining a damper and a frame by doing in this way, first, the damper outer peripheral side
uneven ¦ corrugated ¦ grooved part and the uneven ¦ corrugated fitting part for frame side
dampers are aligned and fitted.
At the same time or after the fitting, if, for example, an adhesive material is applied to the joint
surface between the damper frames formed by both of them, the damper outer peripheral
uneven portion and the uneven fitting for the frame side damper are fitted. In the part, the
bonding area is increased by the unevenness and the circumferential displacement is prevented,
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and the part is strongly bonded. Thus, the input resistance is improved by firmly connecting the
damper and the frame. In addition, even when there is a strong input, it is possible to make it
difficult to cause peeling of the two, and to provide a speaker device in which the product life is
extended.
[0014]
Furthermore, in the speaker device according to another aspect of the present invention, in the
speaker device in which the vibrating member is stretched and supported on the frame via the
edge on the outer circumferential side of the vibrating member joined to the voice coil bobbin,
An edge outer peripheral side uneven portion having unevenness is formed in a direction of a
line of a joint surface to be joined to the frame, and the joint surface joining the edges of the
frame is also directed to a normal direction of the joint surface A frame side edge concave and
convex fitting portion is formed, and the edge outer peripheral side concave and convex portion
and the frame side edge concave and convex fitting portion are fitted and joined together to form
an inter-edge frame joint surface. It is assumed that
[0015]
When joining an edge and a flame ¦ frame by doing in this way, first, the edge outer-periphery
side uneven ¦ corrugated ¦ grooved part and the uneven ¦ corrugated fitting part for frame side
edges are aligned and fitted.
At the same time as or after the fitting, if, for example, an adhesive is applied to the bonding
surface between the edge frames formed by both of them, the uneven fitting for the edge outer
peripheral side and the uneven fitting for the frame side In the part, the bonding area is
increased by the unevenness and the circumferential displacement is prevented, and the part is
strongly bonded. Thus, the input resistance is improved by firmly bonding the edge and the
frame. In addition, even when there is a strong input, it is possible to make it difficult to cause
peeling of the two, and to provide a speaker device in which the product life is extended.
[0016]
A speaker device according to another aspect of the invention includes at least two of the abovedescribed joint surfaces between the damper and bobbin, the joint surface between the damper
frames, and the joint surface between the edge frames. By doing this, the combination of at least
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two of the connection between the damper and the voice coil bobbin, the damper and the frame,
and the connection between the edge and the frame is strengthened. That is, at least two joining
surfaces of the joining surfaces between the damper and the bobbin, the joining surface between
the damper frames, and the joining surface between the edge frames become strong. This
improves the input resistance of the speaker device. In addition, even when there is a strong
input, it is possible to make it difficult to cause peeling of the two, and to provide a speaker
device in which the product life is extended. Preferably, at least one of the bonding surfaces is
corrugated. The wave-like shape is easy to form and has little influence on the sound quality.
[0017]
Furthermore, in the damper of the speaker device which is joined to the frame on the outer
peripheral side and joined to the voice coil bobbin on the open inner peripheral side to support
the voice coil bobbin, the voice of the opening edge portion of the damper A damper center side
concavo-convex portion having concavities and convexities in the normal direction of a joint
surface to which the coil bobbin is joined is formed. For this reason, when joining a damper with
a voice coil bobbin, if the bobbin side uneven fitting portion is provided on the voice coil bobbin,
the damper center side uneven portion can be fitted to the bobbin side uneven fitting portion. As
a result, as compared with the case of using a conventional damper, bonding with the voice coil
bobbin increases the bonding area by unevenness and prevents circumferential displacement,
thereby enabling firm bonding and improved input resistance. A speaker device can be
manufactured. In addition, even when there is a strong input, it is possible to manufacture a
speaker device in which the separation of the damper hardly occurs and the product life is
extended.
[0018]
Another invention is a damper of a speaker device which is joined to the frame on the outer
circumferential side and joined to the voice coil bobbin on the open inner circumferential side to
support the voice coil bobbin. The damper outer peripheral side uneven ¦ corrugated part which
has an unevenness ¦ corrugation in the normal line direction of a damper is formed. For this
reason, when joining a damper with a frame, if the frame side damper uneven fitting portion is
provided on the frame, the damper outer peripheral side uneven portion can be fitted into the
frame side damper uneven fitting portion. As a result, as compared with the case of using a
conventional damper, as compared with the frame, the unevenness increases the bonding area
and prevents the displacement in the circumferential direction, thereby enabling strong bonding
and a speaker with improved input resistance. The device can be manufactured. In addition, even
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when there is a strong input, it is possible to manufacture a speaker device in which the
separation of the damper hardly occurs and the product life is extended.
[0019]
Furthermore, in the invention of the damper which comprises the above-mentioned damper
center side concavo-convex portion, the other invention comprises the above-mentioned damper
outer peripheral side concavo-convex portion further. Therefore, the damper center-side uneven
portion and the bobbin-side uneven fitting portion are fitted and joined, and the damper outer
peripheral side uneven portion and the frame-side damper uneven fitting portion are engaged
and joined. A more robust bonding can be made, and a speaker device with improved input
resistance can be manufactured. In addition, even when there is a strong input, it is possible to
manufacture a speaker device in which the separation of the damper hardly occurs and the
product life is extended.
[0020]
According to another aspect of the present invention, there is provided an outer peripheral side
of a vibrating member joined to a voice coil bobbin, and at an edge of a speaker device for
supporting the vibrating member in tension on a frame, an outer peripheral edge of the edge An
edge outer peripheral side uneven portion having unevenness in the direction is formed. For this
reason, when joining an edge to a frame, if the frame side edge uneven fitting portion is provided
in the frame, the edge outer peripheral side uneven portion can be fitted to the frame side edge
uneven fitting portion. As a result, the junction area is increased due to the unevenness and the
displacement in the circumferential direction is prevented compared to the connection with the
frame in the case of using the conventional edge, so that a strong connection can be made and a
speaker with improved input resistance The device can be manufactured. In addition, even when
there is a strong input, peeling of the edge is less likely to occur, and a speaker device with an
extended product life can be manufactured.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will
be described below with reference to FIGS. 1 to 7. FIG. FIG. 1 is a cross-sectional view showing
the configuration of the speaker device of the present invention. The speaker device 10 in this
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figure shows an external magnet type speaker device as an example. However, the speaker device
10 is not limited to the external magnet type, and the present invention can be widely applied to
general speaker devices such as an internal magnetic type, a repulsion magnetic circuit type, and
the like.
[0022]
In this figure, the speaker device 10 is entirely supported by a frame 11, and is fixed to a
housing, a dashboard or the like. The frame 11 is formed in a substantially frusto-conical shape
in which one side (upper end in FIG. 1) is open, and an opening is formed at the radial center of
the other small side (bottom in FIG. 1) Is formed.
[0023]
Also, a magnetic circuit 12 is attached to the lower base of the frame 11 in FIG. The magnetic
circuit 12 includes a magnet 15, a bottom plate 16, a plate 17, and a yoke 18. Among these, the
plate 17 is to be attached and fixed to the lower bottom surface of the frame 11, and a hole 19 is
formed in the central portion thereof. The hole 19 is formed in a size in which a voice coil bobbin
20 described later can be positioned.
[0024]
By bringing one end face of the magnet 15 into contact with the above-mentioned plate 17 and
bringing the other end face of the magnet 15 into contact with the bottom plate 16, the magnet
15 is held and fixed. The bottom plate 16 is formed to have an outer diameter of a size
corresponding to the plate 17 and the magnet 15, and the yoke 18 is integrated with the yoke 18
or fixed at the central portion thereof.
[0025]
The voice coil bobbin 20 is positioned in the hole 19 of the plate 17. The voice coil 21 is wound
around the voice coil bobbin 20 on the magnetic circuit 12 side of the outer peripheral wall
surface. The voice coil 21 is disposed at a position approaching the inside of the magnetic circuit
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12 so as to be affected by the magnetic force generated in the magnetic circuit 12.
[0026]
The voice coil bobbin 20 is elastically supported by the damper 22 so as to allow axial and radial
movement. As shown in FIG. 3 and FIG. 4, the damper 22 has a first opening 23 formed at its
central portion, and the inner peripheral edge 24 on the side of the opening 23 becomes a first
uneven portion at the center of the damper. The uneven portion 25 is formed. The first concavoconvex portion 25 is formed in a corrugated shape that is undulated in the normal direction of
the joint surface to which the voice coil bobbin 20 is joined.
[0027]
The damper 22 shown in FIG. 3 is bent in the normal direction of the damper 22 in order to bond
the first uneven portion 25 to the voice coil bobbin 20, that is, the state where the damper 22 is
attached to the voice coil bobbin 20. Is an indicator of This bending direction is made to face the
magnetic circuit 12 side along the side wall of the voice coil bobbin 20, as shown in FIG. The
wave-like shape of the first concavo-convex portion 25 is formed every predetermined cycle, but
attachment to the first concavo-convex fitting part 26 to be a bobbin-side concavo-convex fitting
part described below is favorably performed If it is, it does not need to form so that it may
become a predetermined ¦ prescribed period.
[0028]
Here, a first uneven fitting portion 26 is provided in a portion of the side wall of the voice coil
bobbin 20 to which the first uneven portion 25 is attached. The first concavo-convex fitting
portion 26 is formed in a corrugated shape corresponding to the corrugated shape of the first
concavo-convex portion 25 on the outer peripheral side. The corrugated shape of the first
uneven fitting portion 26 is formed at the same pitch as the first uneven portion 25 described
above. For this reason, when an adhesive is applied to the first uneven portion 25 and adhered
and fixed, the surface of the first uneven portion 25 and the outer peripheral surface of the first
uneven fitting portion 26 are fitted well and firmly A first bonding surface 30 is formed which is
a bonding surface between the adhesively fixed damper bobbins.
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[0029]
On the outer peripheral side of the damper 22, a second uneven portion 27 which is a damper
outer peripheral side uneven portion for bonding and fixing the damper 22 to the frame 11 is
provided. Similarly to the first uneven portion 25 described above, the second uneven portion 27
is also formed in a corrugated shape undulating in the normal direction of the joint surface
joined to the frame 11. In addition, the second uneven fitting portion 28 serving as a frame side
damper uneven fitting portion of the frame 11 bonded and fixed to the second uneven portion
27 in accordance with the wave shape of the second uneven portion 27 is also used. , It has
become undulating in a wave shape. The second uneven fitting portion 28 is also formed to have
the same pitch as the second uneven portion 27 described above. And by joining these 2nd
uneven part 27 and the 2nd uneven fitting part 28, the 2nd joint surface 31 used as the joint
surface between damper frames is formed.
[0030]
An elastic deformation portion 29 is formed between the first uneven portion 25 and the second
uneven portion 27 described above. The elastic deformation portion 29 causes the voice coil
bobbin 20 to be resilient against the vibration thereof. Power is given.
[0031]
As shown in FIG. 1, a diaphragm 35 as a vibrating member is attached and fixed to the side wall
of the voice coil bobbin 20 above the damper 22 (the open side of the frame 11).
The diaphragm 35 is, for example, a frusto-conical member made of cone paper, and when it
vibrates, a sound is oscillated. The diaphragm 35 is open at its center and is provided with a
facing wall 36 at the opening edge. Then, the opposite wall 36 is brought into contact with the
side wall of the voice coil bobbin 20, and the adhesive is dropped to thereby fix and fix the voice
coil bobbin 20 and the diaphragm 35. The outer peripheral side of the diaphragm 35 is
adhesively fixed to the edge 40. Then, the edge 40 is attached and fixed to the frame 11,
whereby the diaphragm 35 is supported by the frame 11.
[0032]
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5 to 7 show the configuration of the edge 40. FIG. The edge 40 is ring-shaped in appearance and
has an opening 41 at the center. A diaphragm bonding portion 42 for bonding and fixing the
diaphragm 35 is provided on the opening 41 side. Here, the diaphragm bonding portion 42 is
provided to be inclined at a predetermined angle from the radial direction of the edge 40. The
inclination angle is formed to follow the side surface of the truncated cone diameter diaphragm
35. Further, a bending portion 43 is provided radially outward of the diaphragm bonding portion
42. The bending portion 43 is a portion that bends and vibrates in response to a change in
position of the vibrating plate 35 when the vibrating plate 35 vibrates. The bending portion 43
protrudes toward the opposite side to the inclination direction of the above-described diaphragm
bonding portion 42.
[0033]
On the outer peripheral side of the edge 40, a third uneven portion 44 which is an uneven
portion on the outer edge side of the edge is provided. Similarly to the damper 22 described
above, the edge outer peripheral side uneven portion 44 is also formed to be undulated in a
predetermined pitch, for example. The edge outer peripheral side uneven portion 44 extends in
the direction coincident with the radial direction of the ring-shaped edge 40. Further, in
correspondence to the edge outer peripheral edge side uneven portion 44, the frame 11 is
formed with a third uneven fitting portion 45 which is a uneven portion for fitting the frame side
edge of the frame. The third uneven fitting portion 45 is also formed to have the same pitch as
the above-mentioned edge outer peripheral side uneven portion 44. Then, as shown in FIG. 5, by
bonding the edge outer peripheral side uneven portion 44 and the third uneven fitting portion
45, a third joint surface 32 to be an edge-frame joint surface is formed. .
[0034]
In the speaker device 10 having the above configuration, when the damper 22 and the voice coil
bobbin 20 are joined, first, as shown in FIG. 2, the first uneven portion 25 and the first uneven
fitting portion 26 Align and fit. Then, simultaneously with the fitting or after the fitting, if, for
example, an adhesive material is applied to the first joint surface 30 constituted by both of them,
the first uneven portion 25 and the first uneven portion fit together. The joint portion 26 is
firmly joined.
[0035]
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As described above, the damper 22 and the voice coil bobbin 20 are firmly joined to improve the
input resistance. That is, when the speaker device 10 is used, a large output is produced by the
intense vibration of the diaphragm 35. However, in the case where the first uneven portion 25
and the first uneven fitting portion 26 are provided and these are joined to form the first joint
surface 30, the joint area between them increases. As a result, since a strong bond is formed,
even if a large output occurs, a defect such as peeling does not easily occur between the two.
[0036]
Further, by forming the first concavo-convex portion 25 and the first concavo-convex fitting
portion 26 in a wave-like shape, positioning and joining work between them can be easily
performed. Thereby, joining of the damper 22 to the voice coil bobbin 20 can be easily
performed.
[0037]
The same is applied to the case where the second uneven portion 27 and the second uneven
fitting portion 28 are joined to form the second joint surface 31, and the edge outer peripheral
side uneven portion 44 and the third uneven fit are formed. The same applies to the case where
the third joint surface 32 is formed by joining the joint portion 45.
[0038]
As mentioned above, although each embodiment of this invention was described, this invention
can be variously deformed besides this.
I will describe it below. In the above embodiment, the surface shape of each bonding surface
between the damper 22 and the voice coil bobbin 20, the damper 22 and the frame 11, and the
edge 40 and the frame 11 has been described as a corrugated shape. For example, as shown in
FIGS. 8 (a) to 8 (d), other than the wave-like shape, a shape in which the square unevenness is
fitted (see FIG. 8 (a)) and a shape in which the triangle unevenness is engaged (FIG. 8) (Refer to
(b)), a shape in which U-shaped concave and convex portions formed at a constant pitch fit with
each other (see FIG. 8C), and U-shaped concave and convex portions alternately repeated The
shape and the pitch may be variously modified, such as a shape (see FIG. 8 (d)) in which one
formed at a constant pitch is fitted.
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[0039]
As described above, according to the speaker device of the present invention, when joining the
damper and the voice coil bobbin, first, the uneven portion on the center side of the damper and
the uneven fitting portion on the bobbin side are aligned and fitted Match. At the same time as or
after the fitting, if, for example, an adhesive material is applied to the bonding surface between
the damper and the bobbin formed by both of them, the damper center side uneven portion and
the bobbin side uneven fitting portion Are firmly joined. Thus, the input resistance is improved
by the damper and the voice coil bobbin being firmly joined. In addition, even when there is a
strong input, it is possible to make it difficult to cause peeling of the two, and to provide a
speaker device in which the product life is extended. Further, in the speaker device of the other
invention, the damper and the frame, and the edge and the frame can be firmly joined by the
same configuration.
[0040]
Also in the damper and the edge according to the present invention, by forming the concavoconvex portion having concavities and convexities in the normal direction of the joint surface, it
is strong between the concavo-convex fitting portion formed on the mating surface to be joined.
Bonding is possible.
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