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JPH053596

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH053596
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used in an audio apparatus such as a car.
[0002]
2. Description of the Related Art In recent years, in order to improve vehicle interior acoustic
performance, many types of composite speakers having a tweeter incorporated in a woofer have
come to be used in automobiles. Also, in order to arrange the speakers in an appropriate
direction with respect to the listener, there has been a sharp increase in the number of speakers
with brackets that attach the speakers to the vehicle body via the brackets.
[0003]
Hereinafter, a speaker called a composite type using a conventional resin molded product holder
will be described with reference to the drawings.
[0004]
FIG. 7 is a perspective view showing the conventional tweeter and holder of the conventional
speaker before being attached to the woofer.
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1
In FIG. 7, 1 is a tweeter and a capacitor 2 is fixedly connected to the side surface. The tweeter 1
is screwed to a holder 4 which is a resin molded product using a self tapping screw 3. The
bottom of the holder 4 is inserted from the top of the voice coil 6 of the woofer 5, and the screw
8 is screwed from the bottom of the lower plate 7. Are combined using
[0005]
A cylindrical urethane foam referred to as a dustproof cushion 9 is attached to the lower part of
the holder 4, and the lower surface of the dustproof cushion 9 is attached to the diaphragm 10 of
the woofer 5. The diaphragm 10 has its peripheral portion fixed to the frame 11 and its central
portion coupled to the voice coil 6, and the lead wires of the voice coil 6 are called gold wires 12
and 13 on the surface of the diaphragm 10. Each is connected to a conductive wire. The tweeter
1 is connected such that one end of the gold wire 12, 13 is connected to the terminal 15, 16 of
the terminal plate 14 coupled to the frame 11, and the other end is connected in parallel with the
woofer 5 and the tweeter 1 via the capacitor 2. Are connected by soldering to the terminals 17
and 18 of FIG.
[0006]
Next, the sectional structure of this speaker will be described. FIG. 8 is a structural sectional view
of this conventional speaker. In FIG. 8, a magnetic circuit 22 is constituted by a lower plate 7
provided with a center pole 19, a ring-shaped magnet 20 and a ring-shaped upper plate 21 and a
frame 11 is coupled to the upper surface thereof.
[0007]
The suspension 24 holds the middle portion of the voice coil 6 and is fixed to the frame 11 so
that the lower portion of the voice coil 6 fits into the magnetic gap 23 of the magnetic circuit 22
properly, and the peripheral portion of the diaphragm 10 is a gasket The center portion of the
diaphragm 10 is combined with the upper portion of the voice coil 6 to constitute the woofer 5.
[0008]
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Next, the tweeter 1 will be described.
A magnetic circuit is formed inside the yoke 26 by the cylindrical magnet 27 and a cylindrical
plate 28 similar to the cylindrical magnet 27, and a housing 29 is fixed to the outside of the
magnetic circuit. Furthermore, the voice coil 31 is coupled to the lower side of the diaphragm 30,
and the lower portion of the voice coil 31 is properly fitted in the magnetic gap 32. Further, an
equalizer 33 is disposed above the diaphragm 30 to constitute the tweeter 1.
[0009]
The tweeter 1 is coupled to a holder 4 made of a resin molded product with a self-tapping screw
3, and a nut 34 mounted in advance inside the holder 4 is tightened by a screw 8 inserted from
the bottom of the lower plate 7 of the woofer 5. Holder 4 is coupled. Furthermore, the upper and
lower surfaces of the cylindrical dustproof cushion 9 are attached between the holder 4 and the
diaphragm 10 to constitute a speaker.
[0010]
The operation of the loudspeaker configured as described above will be described below. First,
when an input signal is applied from the terminals 15 and 16 of the woofer 5, the voice coil 6
moves up and down according to the left-hand rule of coleming, and the force vibrates the
diaphragm 10 to emit a sound into the air. Also, the high frequency component of the input
signal passes through the capacitor 2 and is supplied to the voice coil 31 of the tweeter 1, and
the diaphragm 30 vibrates to radiate high noise into the air.
[0011]
Next, another conventional example will be described. FIG. 9 is a perspective view showing
another conventional speaker including a bracket. In FIG. 9, reference numeral 35 denotes a
tweeter, which shows a dome-shaped tweeter. A capacitor 36 is fixed to the side surface of the
tweeter 35, and a bracket 37 made of a resin molded product and the tweeter 35 are coupled by
a self tapping screw 38.
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[0012]
Further, lead wires 41 and 42 are connected to the terminals 39 and 40, and a connector 43 is
connected and coupled to the other ends of the lead wires 41 and 42. The bracket 37 is used to
be attached to the vehicle body of an automobile, and is not directly related to the function of the
speaker.
[0013]
The operation of the loudspeaker configured as described above will be described below. First,
when an input signal is applied to the connector 43, its high frequency component passes
through the capacitor 36 and enters the voice coil, and the diaphragm of the tweeter 35 vibrates
to emit high noise into the air. .
[0014]
In addition, the tweeter 1 and the holder 4 of the conventional speaker shown in FIGS. 7 and 8
are not fixed by using only the adhesive without using the self tapping screw 3 or the bracket
shown in FIG. There was also a speaker which fixed 37 and tweeter 35 only by adhesion.
[0015]
However, in the above-described conventional speaker configuration, it takes time to screw the
tweeter 1 and the holder 4 with the self-tapping screw 3 and the manufacturing cost is high.
Furthermore, if the self-tapping screw 3 is made of iron which is a general-purpose product, the
self-tapping screw 3 is attracted to the magnetic gap 32 of the tweeter 1 at the time of screwing
operation, and the diaphragm 30 is damaged. For this reason, the self-tapping screw 3 has to be
made of non-ferrous metal such as stainless steel, and it becomes a special order item, which is
not only expensive but also difficult to procure.
[0016]
On the other hand, in the configuration in which the tweeter 1 and the holder 4 are adhered only
by adhesion, not only assembly takes time because the adhesive can not be moved until it cures
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4
and hardens, and the amount of adhesive applied is small. There was also a quality issue that the
tweeter 1 was removed from the holder 4 due to.
[0017]
Apart from this, the same applies to a speaker interposing a bracket as described in the other
conventional example, and it takes a lot of time for screwing work, it is difficult to procure nonferrous metal self tapping screw 38, and adhesion by adhesion In the case of only, the tweeter 35
had the quality problem that it would come off the bracket 37.
[0018]
The present invention solves the above-mentioned conventional problems, and it is an object of
the present invention to provide a speaker which does not use a self-tapping screw, has a small
number of assembling steps, and does not drop a tweeter.
[0019]
SUMMARY OF THE INVENTION In order to solve this problem, the speaker of the present
invention is a holder of the above-mentioned holder coupled to the magnetic circuit of the woofer
such that the top part coupling the tweeter is disposed on the front part of the woofer. In the end
portion of the upper surface portion, a cross-sectional shape is formed in an inverted L shape,
and a claw having a convex protrusion is provided on the hook surface so as to face each other,
and a tweeter is inserted into this claw and coupled. is there.
[0020]
With this arrangement, since the claw provided on the holder is hooked and mechanically
coupled to the tweeter housing, screwing with a self-tapping screw is not necessary.
Further, the convex projections provided on the hooking surfaces of the claws hold the tweeter
housing downward, and resonance of the tweeter with the holder can be suppressed.
[0021]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of
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the present invention will be described with reference to the drawings.
The same parts as those described in the conventional example are assigned the same reference
numerals and detailed explanations thereof will be omitted.
[0022]
FIG. 1 is a perspective view showing a state before the tweeter and holder of a speaker according
to the first embodiment of the present invention are attached to a woofer.
In FIG. 1, a claw 45 having an inverted L-shaped cross section is disposed opposite to the upper
surface portion of the holder 44 made of a resin molded product, and a convex projection 46 is
provided on the hooking surface of the claw 45. The tweeter 1 fixed is fitted into the claw 45 and
coupled with the holder 44.
The above is the difference from the conventional example.
[0023]
Next, the bottom of the holder 44 is inserted from the top of the voice coil 6 of the woofer 5, and
the holder 44 is coupled from the bottom of the lower plate 7 using the screw 8. A dustproof
cushion 9 is bonded between the lower portion of the holder 44 and the diaphragm 10, the
peripheral portion of the diaphragm 10 is fixed to the frame 11, and the central portion is
coupled to the voice coil 6. The lead wire of the voice coil 6 is connected to the gold wire 12, 13,
one end of the gold wire 12, 13 is connected to the terminal 15, 16 fixed to the terminal plate
14, and the other end is connected to the terminal 17, 18 of the tweeter 1 Connecting.
[0024]
Next, a state in which the tweeter 1 is coupled to the holder 44 will be described. FIG. 2 is a
partial perspective view showing a state in which the tweeter 1 of the speaker according to the
first embodiment of the present invention is coupled to the holder 44. As shown in FIG. In FIG. 2,
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the claws 45 on the upper surface of the holder 44 hold the tweeter 1 and mechanically couple
them, and the projection 46 presses the tweeter 1 downward.
[0025]
Next, the shape of the claw 45 will be described. FIG. 3 is an enlarged perspective view of the
claw 45. In the figure, on the hooking surface of the claw 45, a projection 46 having a
semicircular cross section is provided. Further, in order to make it easy to insert the tweeter 1, a
rounded surface 48 and a rounding 48 are formed on the tip thereof. That is, in this structure,
the tweeter 1 can be coupled to the holder 44 simply by fitting the tweeter 1 into the claw 45,
and the tweeter 1 does not vibrate because the projection 46 presses the tweeter 1 downward,
The resonance noise is not generated between them, and the quality can be made excellent.
[0026]
Further, the protrusion 46 provided on the hooking surface of the claw 45 will be described. FIG.
4 is a cross-sectional view around the claw 45. As shown in FIG. When the projection 46 is not
present, in order to suppress the rattling between the tweeter 1 and the claw 45, the gap A
between the hooking surface 49 of the claw 45 and the receiving surface 50 is narrowed.
However, in this case, if the gap A is finished small or the housing of the tweeter 1 is finished
large due to variations in resin molding etc., it will not be possible to absorb the dimensional
variation, and if you force the tweeter 1 into the claw 45 It breaks from the root of claw 45.
[0027]
On the contrary, when the gap A is finished large, the tweeter 1 can not be pressed, and the
tweeter 1 vibrates to generate resonance noise with the holder 44. The protrusions 46 function
to absorb these dimensional variations. That is, since the contact area for pressing the housing of
the tweeter 1 is small, it is possible to prevent the claw 45 from being broken from the root by
easily collapsing the projection 46 and further deforming the entire claw 45 even if it is hit hard.
Also, in order to hold down the housing of the tweeter 1, the upper surface of the housing of the
tweeter 1 should be within the range of the height of the projection 46, and there is sufficient
dimensionally sufficient margin.
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[0028]
Next, the shape of the protrusion 46 will be described. In FIG. 4, the cross-sectional shape is
described using the protrusion 46 having a semicircular shape, but the shape of the protrusion is
a wedge shape as shown in FIG. 5 (a) or a trapezoidal shape as shown in FIG. 5 (b) May be
[0029]
Further, the resin material forming the holder 44 will be described. The holder 44 is in contact
with the center pole 19 of the woofer 5 and the housing of the tweeter 1, and therefore, it is
preferable to use an ABS resin of glass fiber blended with less dimensional change due to
temperature change. It is also preferred to use the same material as the tweeter 1 housing.
[0030]
The structural cross section of the speaker according to the present invention has a configuration
in which the self tapping screw 3 is removed by adding the claw 45 to the upper portion of the
holder 4 of the same structural cross section described in the conventional example. Therefore,
the drawings and their descriptions are omitted.
[0031]
The operation of the speaker configured as described above is also the same as that of the
conventional speaker described above, and when an input signal is applied from the terminals 15
and 16, the voice coil 6 moves and this force causes the diaphragm 10 to vibrate. And emit
sound into the air.
Further, the high frequency component of the input signal is supplied to the tweeter 1 through
the capacitor 2 and the high sound is emitted.
[0032]
As described above, according to the present embodiment, on the upper surface portion of the
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holder 44 made of a resin molded product, the claw 45 having an inverted L-shaped cross
section is disposed opposite to the above. The tweeter 1 is inserted into the claw 45 and joined to
the holder 44 so that the number of assembling steps is small and the number of parts is small
and the tweeter 1 and the holder 44 are mechanically coupled. it can. In addition, since the
projection 46 presses the tweeter 1 downward, it is possible to obtain a speaker of excellent
quality which does not generate abnormal sound due to resonance of the tweeter 1 at low cost.
[0033]
Second Embodiment A second embodiment of the present invention will be described below with
reference to the drawings. FIG. 6 is a perspective view of a loudspeaker showing a second
embodiment of the present invention. The same parts as those described in the conventional
example are assigned the same reference numerals and detailed explanations thereof will be
omitted.
[0034]
In FIG. 6, reference numeral 35 denotes a tweeter and a capacitor 36 is fixed to the side surface.
On the bracket 51 made by resin molding, a claw 52 having an inverted L-shaped cross section is
disposed to be opposed, a convex projection 53 is provided on the hooking surface of the claw
52, and the tweeter 35 is clawed. It is fitted in 52 and mechanically coupled with the bracket 51.
Inserting the tweeter 35 into the tab 52 is different from that described in the conventional
example.
[0035]
Further, one ends of the lead wires 41 and 42 are connected to the terminals 39 and 40, and the
other ends are connected and coupled to the connector 43. The shape of the claw 52 and the
protrusion 53 are the same as those described in the first embodiment of the present invention,
and the tweeter 35 can be easily fitted into the claw 52, and the protrusion 53 holds the tweeter
35 downward. The resonance of the tweeter 35 is suppressed.
[0036]
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Furthermore, the projection 53 has the function of absorbing the variation in finished dimensions
of the tweeter 35 and the bracket 51 as described in the first embodiment of the present
invention. Also, as the resin material for forming the bracket 51, similarly, an ABS resin of glass
fiber blended with less dimensional change with temperature is suitable, and it is better to match
it with the material of the housing of the tweeter 35.
[0037]
The operation of the speaker configured as described above is the same as that described in the
conventional example, and the high frequency component of the input signal applied to the
connector 43 passes through the capacitor 36 and enters the voice coil, causing the diaphragm
to vibrate. It is configured to emit high sound into the air.
[0038]
As described above, the claw 51 having an inverted L-shaped cross section is formed opposite to
the bracket 51, the projection 53 is provided on the hooking surface of the claw 52, and the
tweeter 35 is inserted into the claw 52 By combining with 51, it is possible to inexpensively
construct a speaker of excellent quality in which the tweeter 35 and the bracket 51 do not
resonate because the number of assembling steps is small and no self tapping screw is required.
[0039]
In the first embodiment, the woofer 5 has been described using a circular figure, but the woofer
5 may have an elliptical or rectangular shape.
The tweeter 1 is not limited to the dome shape, and may be a cone shape or an oval shape.
Further, in the second embodiment, the tweeter 35 has been described using a dome-shaped
figure, but may be a cone shape or an oval shape, and is not limited to the tweeter, and is a
squawker or a small full-range speaker It goes without saying that it is good.
[0040]
As described above, in the speaker according to the present invention, the holder or the bracket
is disposed with the claw having an inverted L-shape in cross section opposite to each other, and
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the hooking surface of the claw is provided with a convex projection. By fitting in the claws and
mechanically connecting them, a self-tapping screw is not required, the number of assembling
steps is reduced, and an inexpensive speaker which is free from abnormal noise due to tweeter
resonance is easily realized. It can be done.
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