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JP2003309889

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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 JP2003309889
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
so-called dynamic speaker, and more particularly to a connecting terminal attachment structure
thereof.
[0002]
2. Description of the Related Art Dynamic speakers have been known as a type of speaker. When
attaching this dynamic speaker to a mobile phone etc., the size of the speaker has conventionally
been large and it has not been disturbed without special consideration in the back space, but
along with the miniaturization of the mobile phone, the speaker itself has also been miniaturized
Thinning is progressing.
[0003]
Since the internal vibration space inside the speaker is also reduced in proportion to the progress
of downsizing and thinning of the speaker, the vibration resistance increases when the back of
the speaker is in close contact with an external device and sealed. It had become. In order to
obtain high characteristics while reducing the size of the speaker to cope with this, it has become
necessary to reduce the vibration resistance by using the back space outside the speaker. As
disclosed in Japanese Patent Application Laid-Open No. 2000-509935, special parts have to be
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added to cope with the gap on the back of the speaker.
[0004]
However, the addition of such special parts leads to an increase in cost, and also causes a
problem that the speaker which has been made to be very thin becomes thick as a whole.
[0005]
The present invention has been made in view of such circumstances, and in a dynamic speaker,
the rear space is effectively used without increasing the number of parts, and the high
performance is achieved without increasing the cost. It aims at providing a speaker.
[0006]
SUMMARY OF THE INVENTION The present invention aims at achieving the above object by
utilizing a terminal support member and making a gap in the back of the speaker.
[0007]
That is, the speaker according to the present invention comprises: a diaphragm; a voice coil fixed
to the diaphragm; a frame for supporting the diaphragm; and a speaker back surface for
supplying an external electrical signal to the voice coil. In a speaker comprising a terminal
portion provided and a terminal support member fixed to the frame for supporting the terminal
portion, the terminal support member when the speaker is connected to an external device The
terminal support member projects from the back of the speaker with respect to the frame so that
the terminal contacts the circuit board of the external device and is held while maintaining a
predetermined distance between the frame and the circuit board of the external device; It is
characterized by
[0008]
Moreover, the said terminal part is comprised by the spring terminal, It is characterized by the
above-mentioned.
[0009]
Furthermore, an air passage for connecting the internal space of the speaker and the external
space is provided on the back of the speaker.
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[0010]
Further, the air passage is provided in the terminal support member.
[0011]
As described in the above configuration, in the speaker according to the present invention, when
the speaker is connected to the external device, the terminal support member contacts the
external device, and there is a gap between the frame and the external device. Since the terminal
support member protrudes from the back of the speaker with respect to the frame so as to be
held in place, the speaker can be disposed on the external device in a form of being partially
floated without using a special spacer.
As a result, the rear space of the speaker can be widely used without newly adding special parts,
and a speaker with high performance can be obtained inexpensively.
[0012]
In particular, by adapting the terminal support member to the necessary spring terminal, it is
possible to widely use the rear space of the speaker without newly adding special parts, and to
obtain a speaker with high characteristics at low cost. Becomes possible.
[0013]
Furthermore, since the air passage for connecting the internal space of the speaker and the
external space is provided on the back of the speaker, the internal space of the speaker can be
reliably connected to the external space, and the rear space can be used effectively. It will be
possible.
[0014]
In particular, by providing the air passage in the terminal support member, it becomes possible
to simultaneously form the gap and the air passage with only the terminal support member, and
there is no need to specially process other parts, and the speaker It is possible to secure an air
passage connecting the inside and the outside.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
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described below with reference to the drawings.
[0016]
FIG. 1 is a plan view showing a speaker 10 according to an embodiment of the present invention
in the state of being disposed upward, FIG. 2 is a plan view showing the speaker 10 in a state of
being disposed downward, and FIG. It is a detailed sectional view of 1.
In FIG. 2, the terminal member 22 is omitted.
FIG. 4 is a cross-sectional view showing a state in which the speaker 10 according to an
embodiment of the present invention is disposed in an external device.
[0017]
As shown in these figures, the speaker 10 according to the present embodiment is a small (about
13 mm outer diameter) dynamic speaker, and is adapted to be used, for example, in a mobile
phone or the like.
[0018]
The speaker 10 is mounted on the cover 12 from the front surface side (upper surface side) by
stacking the support ring 16, the diaphragm 14, the yoke 32 and the magnet 30, and the voice
coil 24 is mounted on the diaphragm 14. A base unit 38 is disposed on the back side.
[0019]
The cover 12 is a housing made of aluminum or the like and made of metal and having a
thickness of about 1.5 mm, an outer diameter of about 13 mm, and a height of about 2.3 mm.
On the surface side of the cover 12, there is a surface end face 12a for receiving the support ring
16, the diaphragm 14 and the like, and it is configured in a circle having a width of about 0.5
mm.
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On the inner peripheral side of the surface end surface 12a, there is a release portion having a
diameter of about 12 mm for transmitting the acoustic vibration generated from the diaphragm
14 to the outside.
[0020]
The support ring 16 is a relatively soft metal ring-shaped support member formed of free-cutting
brass or the like, and when the diaphragm 14 is sandwiched between the cover 12 and the yoke
32, the support ring 16 is between the diaphragm 14 and the cover 12. And a member for
maintaining and fixing a predetermined clearance with respect to the cover 12.
[0021]
The diaphragm 14 is a diaphragm-like member having a plurality of concavities and convexities
formed concentrically, and is formed by subjecting a synthetic resin film made of polyether imide
(PEI) to heat press molding. It is a member of about 15 μm and an outer diameter of about 13
mm.
An outer peripheral flat portion 14a (an outer peripheral edge) of the diaphragm 14 and an
intermediate flat portion 14b closer to the center are formed as an annular flat surface located
on the same horizontal surface.
The diaphragm 14 is adhesively fixed to the inner surface of the surface end surface 12a of the
cover 12 at the outer peripheral flat portion 14a via the support ring 16, and is adhesively fixed
to the upper end of the voice coil 24 at the intermediate flat portion 14b. ing.
In addition, since the diaphragm 14 has translucency, as shown in FIG. 1, the internal voice coil
24, the board | substrate 18, the spring guide 20, etc. can be seen through.
[0022]
The upper end of the voice coil 24 is adhesively fixed to the middle flat portion 14b of the
diaphragm 14, and the voice coil 24 is fixed to the diaphragm 14 so that the base unit 38 can be
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disposed at a predetermined interval on the inner periphery thereof.
A pair of lead wires 26 extend from the upper end portion of the voice coil 24 to the base unit 38
and is conductively fixed on the substrate 18 of the base unit 38 by thermocompression bonding
or the like.
[0023]
The yoke 32 and the magnet 30 are both formed in a disk shape, and are placed on the back
surface of the diaphragm 14 so as to be concentric with each other in this order and are
adhesively fixed in order.
Further, the side surfaces of the voice coil 24 are accommodated on the inner peripheral surface
of the yoke 32 so as to be spaced apart by a predetermined distance, and the cylindrical
magnetic gap is formed to have the same width all around.
[0024]
The base unit 38 includes a substrate 18, a spring guide 20, a terminal member 22 and a base
28.
The base unit 38 is formed by fitting the spring guide 20 from the back of the base 28 and fixing
the substrate 18 to the surface of the spring guide 20 by heat caulking or the like.
[0025]
First, the base 28 is a member made of metal such as iron having a disc-like bottomed portion on
the outside of the cylindrical member.
The base 28 is a member that forms a part of the magnetic circuit, and the voice coil 24, the yoke
32, the magnet 30, and the base 28 form a magnetic path.
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Four base holes 28a are provided on the outer periphery of the base 28 at intervals of 90 °, and
an air passage is formed so that the inside of the speaker 10 and the back face communicate with
each other.
[0026]
The substrate 18 is a circuit board fixed to the spring guide 20, and the terminal members 22 are
connected and fixed to the pattern on the substrate 18 by soldering or the like from the back
surface of the substrate 18. Are connected by thermocompression bonding or the like, whereby
the terminal member 22 and the lead wire 26 are conductively connected.
[0027]
The spring guide 20 is a disk-shaped member formed of resin such as polystyrene, and is a
member for supporting the terminal member 22 on the back side.
Further, a substrate 18 is fixed on the surface side, and the terminal member 22 and the pair of
lead wires 26 are conductively joined.
On the back surface of the spring guide 20, a separation wall 20b for preventing contact between
the externally wound taper spring 22a as the terminal member 22 and the internally wound
taper spring 22b surrounds the outer circumference of the internally wound taper spring 22b. Is
located in Thus, the terminal members 22 can be held so as not to short circuit each other.
[0028]
At the outer peripheral portion of the spring guide 20, four vent holes 20a are provided at every
90.degree., And an air passage is formed so that the inside and the outside of the speaker 10
communicate with each other. Furthermore, a stepped portion 20c having a height of about 1
mm is formed in a disk shape on the outer peripheral portion of the spring guide 20 so that the
back surface of the base 28 and the surface of the stepped portion 20c face each other. The
stepped portion 20c is set to protrude further to the back than the base 28 and the cover 12.
Therefore, when the speaker 10 is attached to a flat circuit board or the like of an external
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device, on the outer peripheral side than the stepped portion 20c, Since the other members of
the speaker 10 do not contact the circuit board of the external device and there is a gap, an air
path connecting the inside and the outside of the speaker 10 is formed.
[0029]
The externally wound taper spring 22a and the internally wound taper spring 22b, which are the
terminal members 22, are respectively terminal members wound in a tapered shape, and are
separated from the substrate 18 of the speaker 10 at the center to correspond to the bullseye
shaped external substrate. Therefore, an inner-winding taper spring 22b having a smaller
diameter is disposed, and an outer-winding taper spring 22a having a larger diameter as it is
separated from the substrate 18 of the speaker 10 is disposed to surround the outer periphery
thereof.
[0030]
Next, a method of assembling the speaker 10 according to the present embodiment to an
external device will be described.
[0031]
When the speaker 10 is disposed in the external device 50 such as a mobile phone, as shown in
FIG. 4, the speaker 10 is disposed so as to be sandwiched between the speaker fixing portion 52
and the external substrate 54.
When sandwiching the speaker 10 in the external device 50, the front surface end 12a which is a
rigid portion on the surface side of the speaker 10 is pressed by the speaker fixing portion 52 so
that the speaker 10 is completely fixed. A certain spring guide 20 is pressed by the external
substrate 54 to be sandwiched and fixed.
Further, the outer winding taper spring 22a and the inner winding taper spring 22b are brought
into pressure contact with the circuit pattern on the outer substrate 54 and are conducted
respectively. As described above, when the speaker 10 is fixed to the external device 50, the
spring guide 20 projects to the back side so as to be in contact with the external substrate 54.
Therefore, the speaker 10 is disposed on the outer peripheral side of the vent hole 20a and the
base hole 28a. Since the base 28 and the cover 12 which are members float from the external
substrate 54 and there is a gap between them, air from the air passage A by the vent hole 20a
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and the air passage B by the base hole 28a flows to the outside. Since the back space of the
diaphragm 14 is expanded, higher characteristics can be obtained. In the present embodiment,
the distance between the end face of the cover 12 and the external substrate 54 is approximately
0.3 mm to 0.5 mm, and the external space on the circumferential direction side of the speaker 10
and the internal space of the speaker 10 are communicated. It functions well as an air passage.
[0032]
In the present embodiment, although the outer wound taper spring 22a and the inner wound
taper spring 22b are used, the present invention is not limited to this, and a normal coil spring, a
plate spring or the like may be used.
[0033]
As described above in detail, in the speaker 10 according to the present embodiment, when the
speaker 10 is connected to the external device 50, the spring guide 20 protrudes from the rear
surface of the speaker 10 and contacts the external substrate 54 of the external device 50. Since
the gap 28 is held between the cover 28 and the external substrate 54 of the external device 50,
the speaker 10 may be arranged in the external device 50 in a form of floating partially without
using a special spacer. It becomes possible.
As a result, the rear space of the speaker 10 can be widely used without newly adding special
parts, and in particular, the external space on the circumferential direction side of the speaker 10
can be used, which is inexpensive It becomes possible to obtain a speaker with high
characteristics.
[0034]
In particular, by adapting to what is constituted by the spring terminals such as the externally
wound taper spring 22a and the internally wound taper spring 22b which needs to provide the
spring guide 20, the back surface of the speaker 10 is newly added without newly adding special
parts. It becomes possible to use space widely, and it becomes possible to obtain a speaker of
high characteristics inexpensively.
[0035]
Furthermore, since the vent hole 20a and the base hole 28a for connecting the internal space of
the speaker 10 to the external space are provided in the back of the speaker 10, the internal
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space of the speaker 10 can be reliably connected to the external space, It is possible to make
effective use of the back space.
[0036]
Further, particularly, by providing the air holes 20a which are air paths in the spring guide 20, it
is possible to simultaneously form the gap and the air path only by the spring guides 20, and it is
necessary to specially process other parts. In addition, an air path connecting the inside of the
speaker 10 to the outside can be reliably secured.
In particular, since the spring guide 20 is formed of resin, if an air passage is secured at the time
of molding, special processing is unnecessary.
In the present embodiment, the base 28 is also provided with the base hole portion 28a, which is
an air passage, but this is for more reliably securing the air passage. Even if only the vent hole
20a of the spring guide 20 is formed, the air passage is formed. This is possible, and in this case
the processing of the base 28 etc. is unnecessary.
[0037]
Brief description of the drawings
[0038]
1 is a plan view showing a speaker according to an embodiment of the present invention
disposed in an upward direction
[0039]
2 is a plan view showing the speaker according to the embodiment of the present invention in a
state of being disposed downward
[0040]
Fig. 3 is a detailed sectional view taken along the line III-III in Fig. 1
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[0041]
4 is a cross-sectional view showing the above-mentioned speaker mounted on an external device
[0042]
Explanation of sign
[0043]
DESCRIPTION OF REFERENCE NUMERALS 10 speaker 12 cover 12a surface end surface 14
diaphragm 14a outer peripheral flat portion 14b intermediate flat portion 16 support ring 18
substrate 20 spring guide 20a air hole 20b isolation wall 20c step 22 terminal member 22a
outer winding taper spring 22b inner winding taper spring 24 26 Lead wire 28 Base 28a Base
hole 30 Magnet 32 Yoke 38 Base unit 50 External device 52 Speaker fixing portion 54 External
substrate A, B Air path
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