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JPH0819093

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Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH0819093
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
on-vehicle speaker, and more particularly to a structure of a terminal portion for electrically
connecting a voice coil and a power supply on the side of a vehicle.
[0002]
2. Description of the Related Art FIG. 6 is a longitudinal sectional view of a generally known invehicle speaker.
[0003]
The speaker shown in the figure comprises a yoke 1 having a center pole 1a erected, an annular
magnet 2 mounted on the yoke 1 so as to surround the center pole 1a, and a speaker 2 mounted
on the magnet 2 A magnetic circuit is constituted by the placed top plate 3, and is wound around
the coil bobbin 4 in the magnetic gap G formed between the outer peripheral surface of the
center pole 1 a and the inner peripheral surface of the top plate 3. The voice coil 5 is loosely
inserted.
An inner peripheral portion of a diaphragm 6 made of cone paper or the like is adhered to the
coil bobbin 4, and an outer peripheral portion of the diaphragm 6 is supported by a frame 8
made of an iron plate or the like via a cone edge 7. . Further, the inner peripheral portion of the
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damper 9 is adhered to the coil bobbin 4, and the inner peripheral portion of the diaphragm 6
and the coil bobbin 4 are supported by the frame 8 via the damper 9. Then, the lead wires 10
(only one of which is shown in FIG. 6) respectively derived from the winding start end and the
winding end of the voice coil 5 utilize the space between the damper 9 and the diaphragm 6 to
make the side wall 8a of the frame 8 The leading end portion of the lead wire 10 thus drawn out
and drawn out is connected to a pair of positive and negative terminals 11 (only one is shown in
FIG. 6) attached to the through hole of the side wall 8a. In addition, the code | symbol 12 in the
figure has shown the center cap.
[0004]
The on-vehicle speaker configured as described above connects external lead wires (not shown)
derived from the power supply on the vehicle side to the positive and negative terminals 11 via
connectors or the like. By supplying a voice signal current to the voice coil 5 through the
terminal 11 and the lead wire 10, the voice coil 5 receiving electromagnetic force in the magnetic
gap G is driven, and the coil bobbin 4 is driven accordingly, and the diaphragm 6 vibrates and
sounds are emitted.
[0005]
By the way, when such a car-mounted speaker is attached to a car, it is easy if the connector
portion of the external lead wire derived from the power supply on the car side is directly
connected to the terminal 11 However, since the shape of the connector portion differs
depending on the automobile manufacturer and the type of vehicle, in order to make the
speakers common, it is necessary to interpose a relay cable between the terminal 11 and the
connector portion.
That is, if a plurality of relay cables whose one end can be connected to the terminal 11 and the
other end can be connected to the connector part of the external lead wire are prepared
according to the type of the connector part, a suitable relay cable is selected from them. By using
it, the mounting operation can be performed relatively easily. However, in the vehicle-mounted
speakers that are marketed with multiple relay cables attached in this way, unused relay cables
are wasted, which has been a factor in increasing costs.
[0006]
In the case of an in-vehicle speaker in which similar models having the same basic configuration
but different in the shape of the terminal portion are arranged instead of using a common
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speaker and preparing a plurality of relay cables, high-mix low-volume production As a result,
the manufacturing efficiency is poor, and further cost increase is required.
[0007]
The present invention has been made in view of the problems of the prior art, and its object is to
simplify connection with external lead wires and to cope with the same model even if the types of
connector portions of the lead wires are different. An object of the present invention is to provide
an on-vehicle speaker which can be reduced in cost.
[0008]
SUMMARY OF THE INVENTION The above object of the present invention is to derive a lead
from a voice coil supported by a frame and loosely inserted into a magnetic gap, and to fix the
lead to the frame. In a vehicle-mounted speaker which is electrically connected to a terminal and
the power supply of the car side is connected to the terminal and the voice coil is driven by an
electromagnetic force, the frame is made of an insulating resin molded article. This is achieved by
integrating a metal plate having a plurality of types of the terminals in a partially embedded state
in this frame.
[0009]
[Operation] The metal plate can be easily integrated with the frame by techniques such as insert
molding, and since the metal plate is provided with a plurality of terminals, the connector for the
external lead wire Even if the type of part is different, the same model can be used.
[0010]
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 is a back view of a frame according to an embodiment of the vehicle-mounted speaker
according to the present invention, FIG. 2 is a front view of the frame shown in FIG. 1, and FIG. 3
is integrated with the frame shown in FIGS. FIG. 4 is a longitudinal sectional view showing the
whole construction of the embodiment, and the parts corresponding to FIG. 6 used in the
explanation of the prior art are given the same reference numerals.
[0012]
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In the loudspeaker shown in FIGS. 1 to 4, a magnetic circuit is formed by arranging a ring-shaped
magnet 2 having a substantially U-shaped cross section around a cylindrical pole piece 13 and
the thickness of the magnet 2 The voice coils 5 wound around two places of the coil bobbin 4 are
loosely inserted in the magnetic gap G formed between the inner peripheral surface of the meat
portion and the pole piece 13.
The inner peripheral portion of the damper 9 and the inner peripheral portion of the diaphragm
6 are bonded together at the upper portion of the coil bobbin 4, and the inner peripheral portion
of the diaphragm 6 and the coil bobbin 4 are framed through the damper 9. It is supported by
14.
The frame 14 is an insulating molded product having a central protrusion 14a, an annular recess
14b and a side wall 14c, and is formed by inserting a pair of substantially C-shaped metal plates
15 and 16 into its mold. The pole piece 13 and the magnet 2 are mounted and fixed in an
annular recess 14b surrounding the central projection 14a, and dampers 9 and cone edges 7 are
provided on side walls 14c extending obliquely upward around the annular recess 14b. It is
supposed to be attached.
A pair of metal plates 15 and 16 are disposed with their end portions facing each other so as to
be embedded in the lower inner wall surface of the side wall 14c, and both of these metal plates
15 and 16 are The approximate center of the exposed surface is erected to project both ends
toward the back surface of the side wall 14c.
[0013]
That is, one end of the substantially C-shaped metal plate 15 is bent at one end thereof to form
positive terminals 15a and 15b, and the substantially central portion is bent to the other surface
to form a connecting portion 15c. Similarly, the other metal plate 16 is bent at one of its both
ends to one side and made as terminals 16a and 16b for-, and is made as a connection part 16c
by bending the substantially central part to the other side. .
Therefore, on the back surface side of the side wall 14c of the frame 14, two types of + terminals
15a and 15b conducted to the wire connection portion 15c and two types of-terminals 16a and
16b conducted to the wire connection portion 16c are protruded. As shown in FIG. 1, adjacent
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positive terminals 15a and negative terminals 16a form a group of connection terminals
corresponding to a specific type of connector 20, and adjacent positive terminals 15b and
negative terminals 16b are connected. A connection terminal group corresponding to another
type of connector 21 is formed.
[0014]
Then, as shown in FIG. 4, the lead wires 10a and 10b respectively derived from the winding start
end and the winding end of the voice coil 5 utilize the space between the damper 9 and the
magnet 2 to form a frame 14 One lead wire 10 a is connected to the connection portion 15 c of
the metal plate 15, and the other lead wire 10 b is connected to the connection portion 16 c of
the metal plate 16.
In addition, the code | symbol 12 in the figure has shown the center cap.
[0015]
In the on-vehicle speaker configured as described above, the connector portion of the external
lead wire (not shown) derived from the power supply on the vehicle side is connected by fitting it
into the corresponding connection terminal group 15a, 16a or 15b, 16b. After that, the voice coil
current is supplied to the voice coil 5 through the metal plates 15 and 16 and the lead wires 10a
and 10b to drive the voice coil 5 received by the electromagnetic force in the magnetic gap G.
The coil bobbin 4 is driven to vibrate the diaphragm 6 so that sound is emitted.
[0016]
As described above, according to the present embodiment, the metal plate 15 having the two
types of positive terminals 15a and 15b and the metal plate 16 having the two types of negative
terminals 16a and 16b are provided on the frame 14 made of insulating resin. By arranging, two
types of connection terminal groups corresponding to the connectors 20 and 21 having different
shapes are provided on the back surface side of the side wall 14c of the frame 14 so that the
external lead derived from the power supply on the vehicle side If the wire connector portion is
of the same type as one of the connectors 20 and 21, the connection with the power supply can
be easily performed without interposing the relay cable.
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Therefore, when this type of vehicle-mounted speaker is supplied to the user, the types of
attached relay cables and similar models can be reduced to suppress the cost increase, and the
number of relay cables that are wasted without being used is also reduced.
[0017]
In the above embodiment, since the metal plates 15 and 16 can be easily integrated with the
frame 14 by techniques such as insert molding, there is no concern that the manufacturing
process will be complicated.
[0018]
FIG. 5 is a plan view of a metal plate according to another embodiment of the on-vehicle speaker
according to the present invention.
[0019]
In the same figure, on the outer annular metal plate 17, + terminals 17a, 17b and 17c formed by
bending three places at substantially equal intervals to one side, and one place to the other side.
Similarly, the inner annular metal plate 18 is provided with bent connection portions 17d, and
three substantially equally spaced points are bent to one side, and terminals 18a, 18b, and 18c
for 1- A connection portion 18d formed by bending a place to the other surface side is provided.
These metal plates 17 and 18 are integrated in a state in which a part is embedded in the side
wall of the frame (not shown) made of insulating resin, and from the inner wall surface of the
side wall, the connecting portion 17 d and the connecting portion 18 d And the positive
terminals 17a, 17b and 17c and the negative terminals 18a, 18b and 18c from the back surface
side of the side wall so that the adjacent positive terminals 17a and negative terminals 18a
correspond to the first connector. Forming the connection terminal group, and forming the
connection terminal group corresponding to the second connector by the plus terminal 17b and
the minus terminal 18b adjacent to each other, and the third plus terminal 17c and the minus
terminal 18c adjacent to each other. A connection terminal group corresponding to the
connector of is formed.
[0020]
As described above, according to the present embodiment, three types of terminals are provided
on the annular metal plates 17 and 18, respectively, so that connection with three types of
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connectors having different shapes can be performed. At the same time, the types of attached
relay cables and similar models can be further reduced, and significant cost reduction can be
achieved.
[0021]
Incidentally, it is possible to further increase the number of terminals by cutting and raising
appropriate portions of the metal plates 15, 16 and 17, 18 in the above respective embodiments.
[0022]
As described above, according to the present invention, a metal plate having a plurality of types
of terminals is integrated in a partially embedded state in a frame made of an insulating resin.
Even if the type of the connector section of the external lead wire derived from the side power
supply is different, it can be made compatible with the same model, and when supplied to the
user, the types of attached relay cables and similar models can be reduced. Can be easily
integrated with the frame by techniques such as insert molding, and as a result, there is an
excellent effect of being able to provide an on-vehicle speaker easy to connect to an external lead
wire at low cost.
[0023]
Brief description of the drawings
[0024]
1 is a rear view of a frame according to an embodiment of the in-vehicle speaker according to the
present invention.
[0025]
2 is a front view of the frame shown in FIG.
[0026]
3 is a perspective view of the metal plate integrated in the frame shown in FIG.
[0027]
4 is a longitudinal sectional view showing the entire configuration of the same embodiment.
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[0028]
5 is a plan view of a metal plate according to another embodiment of the on-vehicle speaker
according to the present invention.
[0029]
6 is a longitudinal sectional view of a conventionally known in-vehicle speaker.
[0030]
Explanation of sign
[0031]
Reference Signs List 2 magnet 4 coil bobbin 5 voice coil 6 diaphragm 9 damper 10, 10a, 10b
lead wire 13 pole piece 14 frame 14c side wall 15, 16, 17, 18 metal plate 15a, 15b, 17a, 17b,
17c + terminal 16a, 16b, 18a, 18b, 18c-terminals 15c, 16c, 17d, 18d connection G magnetic gap
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