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DESCRIPTION JP2012034338

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DESCRIPTION JP2012034338
[PROBLEMS] To provide a speaker which is excellent in assembling workability and can be
further thinned without deteriorating the input resistance and the bass reproduction ability.
SOLUTION: In a speaker 1, a frame is divided into a first frame 3 and a second frame 7, and a
tinsel wire 11 is separated so that a second frame attached with a magnetic circuit 8 does not
interfere with the tinsel wire 11 back and forth. In order to arrange, the 2nd frame 7 can be
arranged more forward, and thickness reduction of speaker 1 is realizable. Further, since the
short direction fixing portion and the longitudinal direction fixing portion are provided in both
the first frame 3 and the second frame 7, positioning and joining of both frames can be easily
performed, and the workability is improved. [Selected figure] Figure 1
スピーカ
[0001]
The present invention relates to an elongated speaker.
[0002]
Loudspeakers are used not only in household audio devices and in-vehicle audio devices, but also
in TVs and various other electronic devices such as PCs, mobile phones and game machines.
As electronic devices are becoming lighter, thinner, smaller and smaller, smaller, thinner and
higher-performance loudspeakers are also required.
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[0003]
Since the installation space of the speaker is limited, the electronic device has a large restriction
on the dimensions of the speaker, and in particular, a reduction in thickness is required.
[0004]
As a conventional thin speaker, there is a speaker provided with a structure in which a support
member (damper) is joined to an outer peripheral portion of a voice coil bobbin (see Patent
Documents 1 and 2).
[0005]
Although a structure in which the damper is omitted has been proposed as a measure for
thinning, in this structure, the rolling phenomenon is likely to occur and the reproduction volume
is limited.
Moreover, if the damper is omitted, the member holding the vibration of the diaphragm becomes
only the edge and the stability deteriorates, especially in the case of a slender speaker, since the
long side edge is longer than the short side edge, Without the damper, the rolling phenomenon is
more likely to occur.
[0006]
In the conventional cone type speaker, as shown in FIG. 11 (a), a tinsel wire 31 for supplying an
electric signal to the voice coil 30 is connected to the voice coil bobbin 32. As shown in b), the
distance between the tinsel wire 31 and the diaphragm 33 becomes short, and there is a problem
that the amplitude of the diaphragm is limited by the presence of the tinsel wire.
[0007]
Patent Document 1: Japanese Patent Application Publication No. 2006-229288 Patent Document
2: Japanese Utility Model Application Publication No. 60-142596
[0008]
As a solution to the above-mentioned problem, a method is widely adopted in which a lead wire
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drawn from a voice coil is guided to a diaphragm and the tinsel cord is fixed to the diaphragm at
a location not disturbing the amplitude of the diaphragm.
[0009]
However, in the case of a thin flat-plate speaker, as shown in FIG. 11B, the diaphragm 33 has no
inclination in the height direction, so sufficient space is available around the back surface of the
diaphragm 33, the magnetic circuit 34 and the terminal portion 35. There was no space, and it
was not easy to secure a working space for lead wire routing and attachment / fixation of tinsel
wire.
[0010]
In addition, as described in Patent Documents 1 and 2, in a thin flat-plate speaker in which the
damper is fixed to the voice coil, as shown in FIG. It has to be arranged, and the workability is
worse.
[0011]
Furthermore, in the conventional thin flat plate speaker, forming of the lead wire of the voice
coil, electrical connection by soldering between the lead wire and the tinsel wire, and fixation of
the tinsel wire must be performed on the back side of the diaphragm. Workability was very bad
because of the narrowness.
In addition, if you try to enlarge the work space, you have to sacrifice the thinning.
[0012]
The present invention has been made to solve the various problems described above, and its
object is to provide a speaker which is excellent in assembly workability and can be further
thinned without impairing the input resistance and bass reproduction ability. To provide.
[0013]
In the loudspeaker according to one aspect of the present invention, an elongated flat diaphragm,
a first frame disposed behind the diaphragm, an inner peripheral portion thereof is joined to the
diaphragm, and an outer peripheral portion is the first frame Between the diaphragm and the
first frame and along the longitudinal direction of the first frame, and is joined to the first frame
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and the diaphragm. Two dampers, a voice coil bobbin attached to a central portion of the
diaphragm, a second frame disposed so as to surround an outer peripheral surface of the voice
coil bobbin, and the second frame joined to the first frame; A magnetic circuit attached to the
center of the frame, a voice coil wound around the voice coil bobbin and supported in a magnetic
gap of the magnetic circuit, and a lead wire extending from the voice coil A tinsel wire to be
joined, attached to the first frame, and a terminal for bonding the tip portion of the tinsel wire.
[0014]
The second frame includes a hollow cylindrical portion to which the magnetic circuit is joined at
an inner peripheral portion, and a frame joint portion attached to a plurality of places on the
outer peripheral surface of the cylindrical portion and joined to the first frame Have.
[0015]
The tinsel wire is disposed on the outer side in the longitudinal direction of the first frame from
the outer side of the outer peripheral surface of the cylindrical portion.
[0016]
According to the present embodiment, it is possible to provide a speaker which is excellent in
assembling workability and can be further thinned without deteriorating the input resistance and
the bass reproduction ability.
[0017]
BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the speaker 1 which concerns
on one Embodiment of this invention.
FIG. 7 is a process diagram schematically showing an example of an assembly procedure of the
speaker 1 of FIG. 1;
The figure which showed typically an example of the assembly procedure of the speaker 1 of FIG.
(A) The perspective view which shows the state which attached the diaphragm 2 and the damper
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assembly 12, (b) is a perspective view which shows a mode that the 3rd connection part 12a is
removed from (a).
The perspective view which looked at the state which drawn and fixed lead wire 10 and tinsel
wire 11 from the back side of the 1st frame 3. FIG.
The top view which expanded the principal part of FIG.
(A) is the top view seen from the back of the 1st frame 3 which shows the state which finished
drawing of the lead wire 10 and the tinsel wire 11, and fixation, (b) is CC sectional view taken on
the line of (a).
(A) is a top view of the 2nd frame 7 seen from the back side, (b) is a CC sectional view taken on
the line of (a).
(A) is the top view seen from the back side of the speaker 1 of a completed state, (b) is CC
sectional view taken on the line of (a).
(A) is the top view which expanded a part of Fig.9 (a), (b) is CC sectional view taken on the line of
(a).
(A) is sectional drawing which shows the structure of the conventional cone type speaker, (b) is
sectional drawing which shows the structure of the conventional thin speaker.
[0018]
Hereinafter, embodiments of the present invention will be described in detail with reference to
the drawings.
[0019]
FIG. 1 is a perspective view of a speaker 1 according to an embodiment of the present invention.
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As illustrated, the speaker 1 according to the present embodiment includes a diaphragm 2 in the
shape of an elongated flat plate, a first frame 3 disposed behind the diaphragm 2, and an edge 4
attached to the peripheral portion of the diaphragm 2. , Two dampers 5 joined to the first frame
3 and the diaphragm 2, a voice coil bobbin 6 attached to the center of the diaphragm 2, a second
frame 7 joined to the first frame 3, and It is joined to the magnetic circuit 8 attached to the
central part of the two frames 7, the voice coil 9 wound around the voice coil bobbin 6 and
supported in the magnetic gap of the magnetic circuit 8, and the lead wire 10 extending from the
voice coil 9 A tinsel wire 11 and a terminal 13 attached to the first frame 3 and joining the tip of
the tinsel wire 11 are provided.
[0020]
The first frame 3 has a shape that defines the outer shape of the speaker 1. Most members other
than the 1st frame 3 are stored in the 1st frame 3, and, thereby, thickness reduction is realized.
[0021]
A voice coil bobbin 6 attached to the diaphragm 2 is disposed substantially at the center of the
first frame 3. A tinsel wire 11 is soldered to the end of a lead wire 10 extending from a voice coil
9 wound around a voice coil bobbin 6. The lead wire 10 and the tinsel wire 11 are fixed at a
plurality of locations of the first frame 3 and the first connecting portion 5 b of the damper 5 as
described later.
[0022]
The second frame 7 has a hollow cylindrical portion 7a to which the magnetic circuit 8 is joined
at the inner peripheral portion, and two short direction fixing portions 7b projecting in the lateral
direction of the first frame 3 from the outer peripheral surface of the cylindrical portion 7a. And
two longitudinal fixing portions 7c which project in the longitudinal direction of the first frame 3
from the outer peripheral surface of the cylindrical portion 7a. The fixing portions 7 b and 7 c
are joined to the back surface of the first frame 3 as described later.
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[0023]
The magnetic circuit 8 is inserted inside the cylindrical portion 7a. The magnetic circuit 8
includes a pole piece 8a, a magnet 8b disposed behind the pole piece 8a, and a pot yoke 8c
disposed behind the pole piece 8a and covering the periphery of the pole piece 8a and the
magnet 8b. The outer peripheral surface of the pot yoke 8c is joined to the inner peripheral
surface of the cylindrical portion 7a.
[0024]
Each of the two damper units 5 includes two dampers 5a disposed in the lateral direction of the
first frame 3 and a first connecting unit 5b connecting one end of each of the dampers 5a and
fixing the one end to the back surface of the diaphragm 2 And a second connecting portion 5c
connecting the other ends of the dampers 5a and fixing the other ends to the first frame 3.
[0025]
As described later, when assembling the speaker 1 of FIG. 1, the two dampers 5 are attached to
the diaphragm 2 in a state of being incorporated in the damper assembly 12.
As shown in FIG. 1, the damper assembly 12 has two damper portions 5 and a third connecting
portion 12 a that connects the two damper portions 5. After the damper assembly 12 is attached
to the diaphragm 2, the third connection portion 12a is removed, and as a result, a structure in
which only the two damper portions 5 are attached to the diaphragm 2 is manufactured.
[0026]
2 is a process diagram schematically showing an example of an assembly procedure of the
speaker 1 of FIG. 1, and FIG. 3 is a view schematically showing an example of an assembly
procedure of the speaker 1 of FIG. Hereinafter, an example of an assembly procedure of the
speaker 1 will be described using FIGS. 2 and 3. First, as shown in FIG. 2 and FIG. 3, the second
connecting portion 5c of the damper assembly 12 is joined to the first frame 3 to obtain the
structure S1 (step 1). Next, as shown in FIG. 4A, the back surface of the diaphragm 2 to which the
edge 4 is attached is joined to the first connecting portion 5b of the damper assembly 12, and
the outer periphery of the edge 4 is joined to the frame 3 , Structure S2 is obtained (step 2). In
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FIG. 4A, illustration of the first frame 3 is omitted for simplification. Next, the third connecting
portion 12 a of the damper assembly 12 is removed. A perspective view of the diaphragm 2 and
the damper portion 5 in this state is as shown in FIG. 4 (b). The illustration of the first frame 3 is
also omitted in FIG. The reason for removing the third connecting portion 12a is to make it
possible to attach the voice coil bobbin 6 having a larger diameter. That is, when the third
connecting portion 12a is present, only the voice coil bobbin 6 which is equal to or less than the
distance between the two third connecting portions 12a can be attached to the diaphragm 2, but
the diaphragm 2 is removed by removing the third connecting portion 12a. The voice coil bobbin
6 having a diameter equal to the length in the short side direction of can be attached. Moreover,
weight reduction of the speaker 1 can be achieved by removing the third connection portion 12
a.
[0027]
Although two dampers 5 without the third connection 12 a may be individually attached to the
diaphragm 2, in this case, it is difficult to position the dampers 5 on the diaphragm 2, and the
two dampers 5 Must be attached separately, which makes the workability worse.
[0028]
Next, the voice coil bobbin 6 is attached to the diaphragm from the rear side of the first frame 3
to obtain the structure S3 (step 3).
At this time, the voice coil 9 is wound around the voice coil bobbin 6 in advance, and the tinsel
wire 11 is joined to the lead wire 10 at the tip thereof.
[0029]
Next, the lead wire 10 and the tinsel wire 11 are drawn and fixed in the first frame 3 to which
the diaphragm 2 and the damper portion 5 are adhered and fixed, and the tip of the tinsel wire
11 is joined to the terminal 13 to obtain the structure S4. Is obtained (step 4).
[0030]
FIG. 5 is a perspective view of a state in which the lead wire 10 and the tinsel wire 11 are drawn
and fixed as viewed from the back surface side of the first frame 3.
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6 is an enlarged plan view of the main part of FIG. As can be seen from these figures, the lead
wire 10 is pulled out from the voice coil bobbin 6, passed through one end of the damper 5a,
routed along the first connecting portion 5b, and deviated from the center of the first connecting
portion 5b. It is joined to the tinsel wire 11 in front of the groove 5d formed in the above. The
lead wire 10 is fixed at a point shown by a broken line 5e in FIG.
[0031]
The tinsel cord 11 is fitted in the groove 5 d and wound around the outer side of the speaker 1 in
the longitudinal direction. After being adhesively fixed by the fixed positioning guide 5 g of the
frame 3, the direction is changed by 90 degrees. It is soldered. In FIG. 6, the portion 5h to which
the tinsel cord 11 is bonded and the portion 5f to be soldered are illustrated by broken lines.
[0032]
FIG. 7 (a) is a plan view seen from the rear of the first frame 3 showing a state in which the lead
wire 10 and the tinsel wire 11 have been routed and fixed, and FIG. 7 (b) is a C-C view of FIG. FIG.
As shown in FIG. 7 (b), the tinsel cord 11 is disposed in front of the damper 5a. Although the
distance between the tinsel wire 11 and the diaphragm 2 is narrow, the tinsel wire 11 is adhered
and fixed at two places as shown in FIG.
[0033]
As shown in FIG. 7 (b), all members including the voice coil bobbin 6 fall within the thickness
range of the first frame 3. Therefore, thinning can be realized.
[0034]
When the lead-out wire 10 and the tinsel wire 11 are completely routed and bonded and fixed,
the second frame 7 is attached to the first frame 3 from the rear side of the first frame 3 to
obtain the structure S5. (ステップ5)。 The short direction fixing portion 7b of the second
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frame 7 is joined to the short direction fixing portion 3a of the first frame 3, and the longitudinal
direction fixing portion 7c of the second frame 7 is joined to the longitudinal direction fixing
portion 3b of the first frame 3. Be done.
[0035]
Before or after the steps 1 to 5 described above, the magnet 8b is fixed to the pole piece 8a to
produce the structure A1 (step 6). Next, the structure A1 is positioned and fixed on the inner
peripheral surface of the pot yoke 8c with a jig (not shown) to obtain a structure A2 (step 7).
Thereby, the magnetic circuit 8 is completed. Next, the magnetic circuit 8 is magnetized to obtain
a structure A3 (step 8).
[0036]
When the steps 5 and 8 are completed, the outer peripheral surface of the pot yoke 8c in the
magnetic circuit 8 is joined to the inner peripheral surface of the cylindrical portion 7a in the
second frame 7 (step 9).
[0037]
FIG. 8 is a view showing a state where the magnetic circuit 8 is attached to the second frame 7.
FIG. 8 (a) is a plan view seen from the rear side, and FIG. 8 (b) is a C-C of FIG. FIG.
As can be seen from the illustration, the magnetic circuit 8 is mounted to substantially fit within
the thickness of the second frame 7.
[0038]
As described above, the magnetic circuit 8 is attached to the second frame 7 joined to the first
frame 3. Thereby, the speaker 1 of FIG. 1 is completed. Fig.9 (a) is the top view which looked at
the speaker 1 of a completed state from back side, FIG.9 (b) is the CC sectional view taken on the
line of Fig.9 (a). Fig.10 (a) is the top view which expanded a part of Fig.9 (a), FIG.10 (b) is the CC
sectional view taken on the line of Fig.10 (a).
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[0039]
As shown in FIG. 9 (b), the second frame 7 and the pot yoke 8 c of the magnetic circuit 8 slightly
project rearward from the bottom of the first frame 3, but most of the members have the
thickness of the first frame 3. It is inside.
[0040]
Further, as shown in FIG. 10 (a), the tinsel wire 11 is not disposed at the position where the
cylindrical portion 7a of the second frame 7 is disposed, and the tinsel wire outside the outer
peripheral surface of the cylindrical portion 7a. 11 are arranged.
The longitudinal fixing portion 7c of the second frame 7 is disposed behind the tinsel wire 11,
but the longitudinal fixing portion 7c is closer to the front end portion of the cylindrical portion
7a by the step shown in FIG. 10B. Since the tinsel wire 11 and the longitudinal fixing portion 7c
are arranged to be shifted in the planar direction as shown in FIG. 10A, the tinsel wire 11 and the
longitudinal fixing portion 7c are disposed at the rear. And there is no risk of interference.
[0041]
Since the tinsel wire 11 has a diameter much larger than that of the lead wire 10, the tinsel wire
11 and the cylindrical portion 7a and the longitudinal direction fixing are performed so as not to
hit the longitudinal fixing portion 7 or the cylindrical portion 7a at the time of the amplitude of
the diaphragm 2. By not overlapping the relationship with the portion 7c in the front-rear
direction and in the planar direction, the entire second frame 7 can be disposed further on the
front side, which contributes to thinning.
[0042]
In FIG. 10 (a), the bonding position 5i of the lead wire 10 and the tinsel wire 11 is disposed so as
not to overlap with the longitudinal fixing portion 7c in the front-rear direction. Even if they are
provided at overlapping positions, as described above, since the longitudinal fixing portion 7c is
disposed rearward by the step in FIG. 10B, the tinsel cord and the longitudinal fixing portion 7c
contact with each other. There is no fear, and it does not hinder thinning.
[0043]
Thus, in the speaker 1 according to the present embodiment, the frame is divided into the first
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frame 3 and the second frame 7, and the second frame 7 attached with the magnetic circuit 8
does not interfere with the tinsel wire 11 in the front-rear direction As described above, since the
tinsel cords 11 are disposed, the second frame 7 can be disposed further forward, and thinning
of the speaker 1 can be realized.
[0044]
Further, by providing the short direction fixing portions 3a and 7b and the longitudinal direction
fixing portions 3b and 7c in both the first frame 3 and the second frame 7, positioning and
joining of both frames can be easily performed. Workability improves.
[0045]
Furthermore, since the third connecting portion 12 a is removed after the damper assembly 12
in which the two damper portions 5 are connected by the first connecting portion 12 a is
attached to the diaphragm 2, the mounting of the damper portion 5 to the vibrating plate 2 Is
easy, and the workability is improved.
[0046]
In the embodiment described above, an example in which the two dampers 5 have the respective
dampers 5a arranged in the lateral direction of the diaphragm 2 has been described, but the
number of dampers 5a is not particularly limited. Three or more dampers 5a may be provided
inside.
[0047]
Further, in the above-described embodiment, the example in which the shape of the diaphragm 2
is elongated is described, but the shape of the diaphragm 2 may be arbitrarily changed.
[0048]
The aspects of the present invention are not limited to the above-described individual
embodiments, but include various modifications that those skilled in the art can conceive, and the
effects of the present invention are not limited to the contents described above.
That is, various additions, modifications and partial deletions can be made without departing
from the conceptual idea and spirit of the present invention derived from the contents defined in
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the claims and the equivalents thereof.
[0049]
REFERENCE SIGNS LIST 1 speaker 2 diaphragm 3 first frame 4 edge 5 damper 5 a damper 5 f
soldering 5 h bonding fixing portion 5 i bonding position of tinsel wire and lead wire 6 voice coil
bobbin 7 second frame 7 a cylindrical portion 7 b short side fixing portion 7 c Longitudinal fixing
portion 8 magnetic circuit 8a pole piece 8b magnet 8c pot yoke 9 voice coil 10 lead wire 11
tinsel wire 12 damper assembly 12a third connecting portion 13 terminal
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