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JP2006229643

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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 JP2006229643
[Object] To be able to miniaturize without reducing the diameter of the edge, and further to
improve the minimum resonance frequency etc. by making the area of the diaphragm larger than
in the prior art, and using an adhesive. To provide a speaker capable of at least positively
engaging and holding an edge on a frame. SOLUTION: The frame 6 is connected to at least a
magnetic circuit 5, and the diaphragm 8 has an inner periphery fixed to a voice coil bobbin 11
around which a voice coil 10 is wound and an edge 7 is provided on the outer periphery. Speaker
1 in which one end 7c of edge 7 is made parallel to the axis of magnetic circuit 5 when one end
7c of edge 7 is fixed to the outer peripheral portion beyond the upper end of frame 6 The fixing
portion 7 d which is vertically extended downward and is provided at the inside of the tip end
portion thereof is engaged with the engaging portion provided at the outer peripheral portion of
the frame 6 to integrate the edge 7 and the frame 6. [Selected figure] Figure 1
スピーカ
[0001]
The present invention relates to a speaker used for various audio devices, more specifically, to a
speaker that can be miniaturized.
[0002]
With the miniaturization of audio equipment, the miniaturization of speakers is required.
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However, in the case of downsizing by reducing the diameter of the speaker, in order to secure
the same vibration area as in the conventional case, the diameter of the edge provided at the tip
of the diaphragm is reduced to fix it to the frame. If the tip of the edge consisting of a flat portion
is reduced, the fixing strength between the frame and the edge is weakened, which causes a
problem in terms of reliability and also has a problem in terms of shape retention of the edge.
[0003]
In addition, if the outer diameter of the diaphragm or the roll diameter of the roll type edge is
reduced in comparison with the conventional one for miniaturization, the minimum resonance
frequency becomes high because the vibration area becomes small, and the low frequency It
becomes difficult to reproduce sufficient volume in the band.
[0004]
Therefore, as a measure to increase the vibration area without changing the speaker aperture, a
speaker is considered in which a flat portion that is the tip of an edge is fixed along the rising
portion and the outer peripheral portion of the frame.
[0005]
For example, in Japanese Patent Application Laid-Open No. 9-327088 (Patent Document 1),
changing the aperture of the speaker by bonding a flat portion, which is the tip of an edge, along
a rising portion of a frame coupled to a magnetic circuit. Instead, the diameter of the roll can be
made larger than that of the conventional one, and as a result, the area of the edge is increased,
the vibration area is increased, and a speaker having a large amount of amplitude of the edge is
disclosed.
[0006]
Moreover, in Japanese Patent Application Laid-Open No. 2003-324793 (Patent Document 2), a
diaphragm can be made larger by providing a speaker aperture as in the prior art, and the
diaphragm is disposed above the diaphragm and this diaphragm. A frame cover for protecting
the diaphragm, a supported portion disposed below the diaphragm and the frame cover and
provided on an outer periphery of the diaphragm and horizontal to the radial direction of the
diaphragm; And a frame having a supporting portion for supporting the supported portion of the
frame cover, wherein the supported portion of the diaphragm is sandwiched between the
supported portion of the frame cover and the supporting portion of the frame. A speaker device
characterized by the present invention is disclosed.
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2
JP-A-9-327088 (specification 0026) JP-A-2003-324793 (specification 0033 to 0034)
[0007]
The speaker aperture in the conventional speaker in which the flat portion provided on the frame
side (peripheral portion side) of the edge is bonded and fixed to the flat portion of the frame has
a size including the flat portion of the frame. How to make the department smaller has been the
measure to miniaturize.
However, as described above, the bonding area between the flat portion of the edge and the
frame is required to have a proper width based on the reliability, and the flat portion can not be
reduced needlessly.
[0008]
Furthermore, the flat portion on the frame side of the edge can not be made smaller because it is
also necessary to maintain the shape of the edge roll portion.
Therefore, it is possible to miniaturize the speaker without reducing the flat portion of the edge,
without reducing the diameter of the diaphragm and reducing the reliability of bonding strength
between the flat portion of the edge and the frame. Was an issue of
[0009]
Further, in the speaker described in Patent Document 1, the structure for fixing the edge tip to
the inside of the rising portion of the frame is described in the specification, but the thickness of
the rising portion of the frame and the edge tip The thickness is a factor to increase the speaker
aperture.
[0010]
Further, in the speaker device described in Patent Document 2, from the necessity of
sandwiching a part of the tip of the diaphragm between the frame cover and the frame, the part
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of the tip of the diaphragm is in the horizontal direction of the frame This is a factor to increase
the speaker aperture by the amount of extension.
[0011]
In view of such a present situation, the present invention can be miniaturized without reducing
the diameter of the edge, and further, by making the area of the diaphragm larger than in the
prior art, it is possible to improve the minimum resonance frequency etc. It is an object of the
present invention to provide a speaker capable of reliably engaging and holding an edge on a
frame without using an adhesive.
[0012]
In order to achieve the above object, the invention according to claim 1 of the present invention
is a frame coupled to at least a magnetic circuit, and a voice coil bobbin having an inner
periphery wound around a voice coil and an edge formed on an outer periphery The speaker
according to the present invention is characterized in that the front end portion of the edge is
fixed to the outer peripheral portion beyond the upper end portion of the frame.
[0013]
The invention according to claim 2 is the speaker according to claim 1, wherein the edge extends
vertically downward so that one end of the edge is parallel to the axis of the magnetic circuit, and
the frame is the inside of the frame. It is characterized in that it is fixed to the outer peripheral
part.
[0014]
The invention according to claim 3 is the speaker according to claim 1, wherein the edge is
provided at an outer peripheral portion of the frame at a tip portion vertically extended
downward so as to be parallel to the axis of the magnetic circuit It is characterized in that a fixing
portion for mounting is formed.
[0015]
The invention according to claim 4 is characterized in that, in the speaker according to claim 3,
the fixing portion is formed integrally with or separately from the edge.
[0016]
The invention according to claim 5 is the speaker according to claim 3 or 4, wherein in the
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frame, an engagement portion corresponding to a fixing portion at the tip of the edge is formed
in an outer peripheral portion. It is a feature.
[0017]
The invention according to claim 6 is characterized in that, in the speaker according to claim 5,
the engaging portion has a shape capable of receiving the fixing portion.
[0018]
The invention according to claim 7 is the speaker according to any one of claims 3 to 5, wherein
the fixing portion is joined to a housing to which the speaker is attached via at least one side
surface. It is a feature.
[0019]
The speaker according to the present invention has conventionally been made to extend the
entire tip of one edge of the flat portion in parallel with the axis of the magnetic circuit
downward, and fix the inside of the tip to the outer peripheral surface of the frame. The
dimensions corresponding to the horizontal portion of the frame in which the edge is fixed are
unnecessary, and the size can be reduced without reducing the diameter of the diaphragm and
the diameter of the edge.
In addition, since it is not necessary to make the bonding portion of the edge with the frame
small, it is possible to ensure sufficient reliability of bonding strength between the tip of the edge
and the frame.
[0020]
In particular, in the present invention, by forming the fixing portion having a specific shape at
the tip of the edge, when the edge is fixed to the outer peripheral surface of the frame,
positioning of the edge can be stably and facilitated. .
[0021]
At that time, by making the fixing part separate from the edge, the edge can be a common part,
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and it becomes possible to provide the fixing part of the frame shape, the size suitable for the
material, the shape and the material at the edge. The speaker characteristics can be freely
changed in accordance with the above.
In addition, by integrating the edge and the fixing portion, the assembly operation can be
facilitated without increasing the number of parts.
[0022]
Further, when the fixing portion of the edge is attached to the outer peripheral portion of the
frame, an engaging portion is formed on the outer peripheral surface of the frame, and the fixing
portion of the edge is fitted to the engaging portion to facilitate assembly. Depending on the
control of the amount, an adhesive that adversely affects the amplitude of the edge and the
adhesive strength may be used only with a supplementary degree, so that the quality can be
stabilized.
[0023]
Furthermore, the fixing portion can perform the function of conventional packing by being joined
to the speaker housing via at least one side surface of the fixing portion.
In particular, by using rubber as the material of the fixing portion, the rubber can absorb the
vibration and can suppress the vibration to the housing and can also prevent the air leakage.
[0024]
Hereinafter, although the embodiment of the speaker concerning this invention is concretely
described based on an accompanying drawing, it can change variously in the range which does
not change the gist of this invention, and the disclosed embodiment It is not limited to
The main reference numerals are common to all the drawings.
[0025]
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FIG. 1 shows an example of a loudspeaker according to the present invention. This loudspeaker 1
is mounted on a magnetic circuit 5 consisting of a pot type yoke 2, a magnet 3 and a disc-like
pole plate 4, and the magnetic circuit 5. It is an internal magnet type speaker composed of the
frame 6, the diaphragm 8 having the edge 7 at the outer peripheral edge, the damper 9, and the
voice coil bobbin 11 around which the voice coil 10 is wound.
[0026]
In the speaker 1 having such a configuration, the edge 7 of the present invention is, as apparent
in FIG. 1, an overhang provided to extend laterally along the inner and outer edges of the ringshaped edge main body 7a having an arced cross section. Pulling out one of the edges 7b and 7c,
that is, the outer overhanging edge 7c, to the outside of the frame 6 beyond the upper end of the
frame 6, bending its tip parallel to the axis of the magnetic circuit The inner side is fixed to the
outer peripheral portion of the frame 6.
At that time, there is no particular limitation on the fixing means as long as the overhanging edge
7c can be securely fixed at a predetermined position on the outer peripheral part of the frame 6,
but by employing the following fixing means, fixing of the edge to the frame can be ensured. And
it can be done easily.
[0027]
More specifically, as shown in FIG. 2, the fixing portion 7d having a hemispherical cross section
is integrally formed along the lower end inside of the outer overhanging edge 7c, and is opposed
to the hemispherical fixing portion 7d. In the upper part of the outer peripheral part of the frame
6, an engagement portion 6a is formed, which has a semi-spherical recess in cross section that
matches the fixing portion 7d, and the fixing portion 7d of the edge 7 is fitted in the engagement
portion 6a. Thus, the edge 7 is fixed to the frame 6.
[0028]
At that time, if the shape of the fixing portion 7d of the edge 7 is slightly larger than the
engaging portion 6a on the side of the frame 6 and press-fit into the engaging portion 6a, it can
be engaged more airtightly. Although it is possible to suppress the use of the adhesive, if
necessary, both may be similar, and the adhesive may be partially applied in the engaging
portion 6a to fix the both.
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Furthermore, although not shown, by appropriately selecting the shapes of the fixing portion 7 d
of the edge 7 and the engaging portion 6 a of the frame 6, it is possible to reliably engage and
hold both without using an adhesive. It is.
[0029]
In this embodiment, the frame 6 uses an ABS resin, but as a material thereof, a cold rolled steel
plate (SPCC) or a polycarbonate (PC) may be used, and as a material of the edge, Rubbers such as
NBR (nitrile butadiene rubber) and SBR (styrene butadiene rubber) can be used.
[0030]
By adopting such a configuration, the minimum resonance frequency is increased by reducing
the vibration area by reducing the diameter of the diaphragm 8 and the edge 7, and it becomes
difficult to reproduce sufficient volume in a low frequency band. It is possible to provide a highly
reliable, small-sized speaker that can be avoided and the degree of engagement between the tip
of the edge 7 and the frame 6 is strong even for a large input.
[0031]
FIG. 3 shows another example of the edge 7 in the speaker 1 according to the present invention,
in which the outer overhanging edge 7c of the edge main body 7a is formed thicker than the
other overhanging edge 7b and The part is notched to make a thin fixed part 7d.
The fixing portion 7d consisting of the notch is closely fixed to the upper end outer peripheral
portion of the frame 6 using an adhesive, thereby integrating the both with each other, but by
forming the fixing portion 7d having a step portion It is easy to attach to the frame 6.
[0032]
Further, in FIG. 4, a small fixed portion 7 d having a circular arc shape in cross section is formed
inside the overhanging edge 7 c which is formed thicker than the thickness of the other
overhanging edge 7 b. The cross section formed opposite to the outer peripheral portion near the
upper end is engaged and fixed to a small arc-shaped engaging portion 6a, the strength of the
projecting edge 7d is improved, and the engagement with the frame 6 is made tight. .
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[0033]
Further, in FIG. 5, a fixing portion 7d having a rectangular cross section is formed inside the
overhanging edge 7c which is formed thicker than the thickness of the other overhanging edge
7b. It is engaged with and fixed to the engaging part 6a which consists of the notch part formed
facing the outer peripheral part of vicinity, and installation of the edge 7 to the flame ¦ frame 6 is
made easy.
[0034]
Moreover, FIGS. 6-8 shows the other example of the edge 7, and all mounted ¦ worn the member
which has a specific shape separate from the edge 7 in one projecting edge 7c. .
The edge 7 in FIG. 6 is a notch in which a member having an inverted L-shaped cross section is
adhesively fixed on the inside of the overhanging edge 7c to form a fixing portion 7d, and the
fixing portion 7d is formed on the outside of the upper end of the frame 6. It is adhesively fixed
to the part.
[0035]
Further, the edge 7 in FIG. 7 is a member having a channel-shaped cross section bonded and
fixed to the inside of the overhanging edge 7c to form a fixing portion 7d, and the fixing portion
7d is fitted to the upper end edge of the frame 6, The edge 7 is fixed to the outer periphery of the
frame 6 and adhesive bonding may be carried out partially or over the entire periphery as
needed.
[0036]
Further, in the edge 7 of FIG. 8, a ring-shaped member having a required width and thickness is
fixed to the outside of one overhanging edge 7c forming the edge 7 to form a fixed portion 7d. A
notch corresponding to the thickness of the projecting edge 7c and the ring-shaped member is
formed on the outer peripheral portion, and the inside of the projecting edge 7c having the fixing
portion 7d on the outer side is adhesively fixed to this notch to form the outer periphery of the
frame 7. The surface and the outer peripheral surface of the edge 7 are flush with each other.
[0037]
The fixing portion 7d manufactured separately from the edge 7 basically uses a material different
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from the material of the edge, and as these materials, plastic, steel plate, paper or the like can be
applied.
[0038]
FIG. 9 shows a voice coil bobbin on which a magnetic circuit 24 comprising a bottom plate 21
having a center pole, a ring-shaped magnet 22 and a top plate 23, a frame 25 fixed on the top
surface of the top plate 23, and a voice coil 26. 27 shows an external-magnet-type speaker 20
consisting of a damper 28 for holding the voice coil bobbin 27 and a diaphragm 29. The outer
peripheral portion of the diaphragm 29 is fixed to the frame 25 via the edge 7. .
[0039]
The frame 25 of the speaker 20 is, as shown in FIGS. 9 to 10, from the fixing portion 25a to the
magnetic circuit 24 toward the tip end, with the outer peripheral portion thereof via one or more
horizontal step portions 25b Since the diameter is successively expanded, a shape (a cross
section in the figure is the same as the shape formed by the step 25b near the tip of the frame 25
and the rising portion 25c connected to the step 25b). The fixing portion 7d is integrally formed
on the inside of the projecting edge 7c of the edge main body 7a, and the fixing portion 7d is
adhesively bonded to several places as necessary, and the lower surface of the stepped portion
25b in the vicinity of the tip portion The frame 25 and the edge 7 are integrated by bonding and
fixing to the rising portion 25c.
[0040]
FIG. 11 shows still another aspect of engagement between the edge 7 and the frame 25 in the
speaker 20, and the frame 25 has a single or an outer peripheral portion from the fixing portion
25a to the magnetic circuit 24 toward the tip end. The outer peripheral portion of the opening of
the frame 25 whose diameter is sequentially increased through the plurality of horizontal step
portions 25b vertically extends upward to form a rising portion 25c, and a hemisphere concaved
inward to the rising portion 25c. The engaging portion 25d is shaped like a letter.
[0041]
On the other hand, the edge 7 is a fixing portion having a hemispherical cross section so as to be
coincident with the engaging portion 25d of the frame 25 inside the overhanging edge 7c which
is located outside the edge main body 7a and formed to extend vertically downward. 7 d is
integrally formed, and the diaphragm 29 is fixed to the frame 25 by attaching the fixing portion
7 d of the edge 7 to the engaging portion 25 d of the frame 25.
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[0042]
FIG. 12 shows still another aspect of the loudspeaker according to the present invention, and
shows a form in which the internal magnet type loudspeaker 1 shown in FIG.
That is, the speaker 1 shown in FIG. 1 is provided at the central portion in the housing 12 using
the spacer 14 and the bolt 15 so that the diaphragm 8 faces the opening 13 of the housing 12 .
[0043]
At that time, as the shape of the fixing portion 7 d of the edge 7 is illustrated so as not to form a
gap between the opening 13 of the housing 12 and the outer peripheral portion of the frame 6
The protruding length is a length that substantially matches the width of the gap, and the entire
edge 7 is formed of rubber.
[0044]
Therefore, when the speaker 1 is mounted in the housing 12 in a state where the fixing portion 7
d is fixed to the frame 6 in advance, the tip of the fixing portion 7 d abuts against the opening 13
of the housing 12 to open the opening 13. Since sealing is performed, if the fixing portion 7d is
fixed to the opening portion 13 using an adhesive, the sealed state can be maintained, and at the
same time, the fixing portion 7d made of rubber absorbs the vibration and the case 11 Since
transmission of vibration can be suppressed, resonance noise can be reduced, and it also serves
as packing, air leakage from the housing 12 can be eliminated and generation of air noise can be
prevented.
[0045]
FIG. 13 shows still another aspect of the loudspeaker according to the present invention, and
shows a form in which the external magnet type loudspeaker 20 shown in FIG. 5 is incorporated
in the baffle plate 30. As shown in FIG.
That is, a part of the opening 31 formed in the baffle plate 30 is cut away to form the step 32,
and the fixing portion 7 d of the edge 7 fixed to the outer periphery of the upper end of the
frame 25 is formed on the step 32. After the contact, for example, the speaker 20 is fixed to the
baffle plate 30 using the bolt 33. If the fixing portion 7d is made of rubber, the same effect as the
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speaker 1 shown in FIG. 8 can be obtained.
[0046]
It is a schematic explanatory drawing which shows an example of the speaker concerning this
invention.
It is an enlarged view which shows the edge of the speaker shown in FIG. 1, and the relationship
of a flame ¦ frame.
It is an enlarged view which shows the other example of the edge which comprises the principal
part of the speaker of this invention.
It is an enlarged view which shows the further another example of the edge which comprises the
principal part of the speaker of this invention.
It is an enlarged view which shows the further another example of the edge which comprises the
principal part of the speaker of this invention.
It is an enlarged view which shows the further another example of the edge which comprises the
principal part of the speaker of this invention.
It is an enlarged view which shows the further another example of the edge which comprises the
principal part of the speaker of this invention.
It is an enlarged view which shows the further another example of the edge which comprises the
principal part of the speaker of this invention.
It is a schematic explanatory drawing which shows the other example of the speaker concerning
this invention.
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It is an enlarged view of the principal part of the speaker in FIG.
It is an enlarged view which shows the other example of the principal part of the speaker in FIG.
It is a schematic explanatory drawing which shows the further another example of the speaker
concerning this invention.
It is a schematic explanatory drawing which shows the further another example of the speaker
concerning this invention.
Explanation of sign
[0047]
1, 20 speaker 2 yoke 3 magnet 4 pole plate 5 magnetic circuit 6, 25 frame 6 a frame engaging
part 7 edge 7 a edge main 7 b, 7 c overhanging edge 7 d fixing part 8 diaphragm 9 damper 10
voice coil 11 voice coil bobbin 12 housing Body 13, 31 opening 14 spacer 15, 33 bolt 30 baffle
plate 32 steps
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