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JPH071684

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DESCRIPTION JPH071684
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
small speaker such as a tweeter used for, e.g.
[0002]
2. Description of the Related Art A tweeter is used as a speaker for reproducing high sound
exclusively. Since the tweeter is small, for example, when it is used as a vehicle, it can be attached
to relatively narrow places such as on dashes, inter dashes, and pillars. In this tweeter, as shown
in FIG. 11, a pair of cords 4 and 5 are drawn out from the + side contact 2 and the-side contact 3
provided on the end face of the speaker main body 1 to be connected to the network There is. In
this case, to any one of the pair of cords 4 and 5, for example, the cord 4 connected to the
positive side contact 2 is connected to a capacitor 6 constituting a high pass filter so as to fully
exhibit the characteristics of the tweeter .
[0003]
When this tweeter is attached to a vehicle, generally, it is often attached at a short distance from
the user, so only the high sound may extremely rise and the balance of the reproduced sound
may be lost. For this reason, generally, as shown in FIG. 12, an attenuator resistor 7 is connected
and level adjustment is performed by operating this resistor 7 to balance the reproduced sound.
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[0004]
By the way, each of the conventional speakers has the following problems. (1) In the speaker of
the configuration of FIG. 11, the phase of the reproduced sound is inverted because the capacitor
6 is connected. Therefore, depending on the result of listening to the speaker, the codes 4 and 5
are connected in reverse phase to input polarity There are cases where it is better to change.
However, it is not easy to change the cord connection after the speaker is attached, and
depending on the vehicle type, it is necessary to perform complicated operations such as
removing the dashboard etc., so the user is simple (2) It is not easy for ordinary users to operate
the attenuator resistor 7 to perform level adjustment, and a skilled adjustment capability is
required. In addition, although it is conceivable to use an attenuator volume that is used in a
relatively easy to adjust home device, there is no way in terms of mounting workability for use as
an on-vehicle device.
[0005]
The present invention has been made in view of the above problems, and it is an object of the
present invention to provide a speaker which can easily change the input polarity to the speaker
body or adjust the level even after the speaker is attached. It is said that.
[0006]
SUMMARY OF THE INVENTION In order to achieve the above object, according to the present
invention, a positive side contact and a negative side contact are disposed on the end face of the
speaker body, and a spacer facing the end face of the speaker body is provided. The + side
contact connected to the + side cord and the-side contact connected to the-side cord are disposed
on the end face, and the + side contact of the speaker body and either the + side contact or theside contact of the spacer Are selectively connectable.
[0007]
Another embodiment of the present invention has a first contact and a second contact disposed
on the end face of the speaker body, and a first cord connected to the end face of the spacer
opposite to the end face of the speaker body. The second contact connected to the second
contact and the second cord, and the first contact of the spacer is set from a plurality of contacts
preset so that the resistance values obtained from the respective contacts differ stepwise The
second contact of the speaker main body and the spacer is always connected, and the first
contact of the speaker main body can be selectively connected to any one of the plurality of first
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contacts of the spacer. Characterized by
[0008]
In the present invention, the first contact and the second contact are disposed on the end face of
the speaker body, and the first cord is connected to the first cord on the end face of the spacer
facing the end face of the speaker body. A second contact connected to the second contact and
the second cord, and the first contact of the spacer is formed in advance so that the resistance
value obtained therefrom is continuously changed; The second contacts of the spacer are always
connected, and the first contact of the speaker main body and the first contact of the spacer can
be connected.
[0009]
According to the configuration of the present invention as set forth in claim 1, of the + side
contact and the-side contact arranged on the end face of the speaker body, the + side arranged
on the end face of the spacer with respect to the + side contact Since the speaker is assembled in
such a way as to connect either the contact point or the -side contact, the input polarity to the
speaker body can be easily changed even after the speaker is attached.
[0010]
According to the second aspect of the present invention, the second contact of the spacer is
always connected to the second contact of the speaker main body, and the first contact of the
speaker main body is obtained. Since the speaker is assembled in such a manner as to connect
any one of the plurality of first contacts of the spacers whose resistance values are set to be
different stepwise, the level adjustment can be easily performed.
[0011]
According to the configuration of the present invention according to the third aspect, the second
contact of the spacer is always connected to the second contact of the speaker main body, and
the first contact of the speaker main body is obtained. Since the speaker is assembled in such a
manner as to connect the first contacts of the spacer formed so that the resistance value to be
continuously changed, the level adjustment can be easily performed.
[0012]
Embodiments of the present invention will now be described with reference to the drawings.
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FIG. 1 is a perspective view showing an embodiment of a speaker according to the present
invention. This embodiment speaker 10 mainly comprises a speaker body 11 and a spacer 21. As
shown in FIG.
As shown in FIG. 2, the + side contact (first contact) 12 is exposed at a position on the left side of
the central portion C of the end face of the speaker main body 11 as illustrated in the enlarged
structure. Is provided with a negative side contact (second contact) 13.
The end face of the spacer 21 facing the end face of the speaker main body 11 has a − side
contact 23 connected to the second cord (− cord) 15 and + connected to the first cord (+ cord)
14 Side contacts 22 are disposed corresponding to the respective contacts 12 and 13 of the
speaker main body 11.
The first cord 14 and the second cord 15 are drawn from the back surface of the spacer 21.
A capacitor 6 connected to the cord 15 is installed inside the spacer 21.
[0013]
The speaker body 11 and the spacer 21 have circular frames 17 and 18, respectively, and a pair
of recessed portions 20A and 20B are formed at the periphery of the frame 17 of the speaker
body 11 and the periphery of the spacer 21. The portion is provided with a pair of protrusions
19A, 19B which can be inserted into the recesses 20A, 20B.
FIG. 3 shows a cross-sectional view of the protrusions 19A, 19B, and FIG. 4 shows a perspective
view of the recesses 20A, 20B.
Grooves 24 are provided in the recessed portions 20A and 20B along the circumferential surface
of the frame 17, and after the respective protruding portions 19A and 19B are inserted into the
recessed portions 20A and 20B, the spacer 21 or the speaker main body 11 is circumferentially
The spacer 21 is locked with respect to the speaker main body 11 by rotating and sliding the
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protrusions 19A and 19B into the groove 24. Thereby, the pair of contacts 12 and 13 of the
speaker main body 11 and the contacts 22 and 23 of the pair of cords 14 and 15 of the spacer
21 can be brought into contact and electrically connected.
[0014]
The recesses 20A and 20B described above are provided at positions 180 ° apart from each
other at the center portion C, and the protrusions 19A and 19B are similarly arranged. For
example, the + side of the speaker main body 11 is provided. The contact 12 and the contact 22
of the + cord 14 of the spacer 21 can be connected in pairs, and the negative contact 13 of the
speaker body 11 and the contact 23 of the cord 15 of-of the spacer 21 can be connected in pairs
The positive contact 12 of the speaker body 11 and the contact 23 of the-cord 15 of the spacer
21 are connected in pairs, and the negative contact 13 of the loudspeaker body 11 and the
contact 22 of the positive cord 14 of the spacer 21 are paired You can also connect with The
combination of these connections can be selected by rotating the spacer 21 or the speaker main
body 180 by 180 ° and connecting the projecting portions 19A, 19B and the concave portions
20A, 20B.
[0015]
According to such a present embodiment, after assembling the speaker 10 by fitting the spacer
21 to the speaker main body 11, even after the speaker 10 is attached to the vehicle, the spacer
21 or the speaker may be used if necessary. The contact polarity of the contacts 22 and 23 of the
spacer 21 with respect to the contacts 12 and 13 of the speaker body 11 can be easily changed
by rotating the body 11 by 180 °. Therefore, even if it is desired to connect each of the cords
14 and 15 in reverse phase according to the result of trial listening after the speaker is attached,
the user can easily change it without requiring a complicated operation such as removing the
dashboard or the like. FIG. 5 is a perspective view showing the assembled speaker 10. The
speaker main body 11 is temporarily removed from the spacer 21, rotated 180 degrees in the
direction of the arrow, and attached again to the spacer 21. It indicates that the polarity can be
changed. In the above embodiment, although the speaker main body 11 and the spacer 21 are
connected by the pair of projecting portions 19A and 19B and the concave portions 20A and
20B, for example, central portions C of the speaker main body 11 and the spacer 21 are attached
and detached. It is also possible to change the polarity of the contacts 12 and 13 by simply
connecting them and rotating the speaker body 11 without removing it from the spacer 21. The
capacitor 6 is installed in the spacer 21.
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[0016]
FIG. 6 is a plan view showing another embodiment of the loudspeaker according to the present
invention, and FIG. 7 is an equivalent circuit diagram of the loudspeaker shown in FIG. The
speaker 30 according to the present embodiment mainly includes the speaker main body 31 and
the spacer 41, and an arc-shaped negative side contact (second contact) at a position on the left
side of the center of the end face of the speaker main body 31 33, and a positive contact (first
contact) 32 is disposed at the position on the right side of the figure. On the other hand, on the
right side of the end face of the spacer 41 facing the end face of the speaker main body 31, the
contact 43 connected to the second cord (-cord) 35 is shown. A plurality of contacts 42A, 42B,
42C connected to the cord 34 via a capacitor 6 are disposed. As shown in the equivalent circuit
of FIG. 7, resistors R1, R2 and R3 (R1> R2> R3) are connected in advance to the plurality of
contacts 42A, 42B and 42C, respectively. One of the resistance values can be selected by
selectively connecting either of the two.
[0017]
A substantially cylindrical protrusion 40 projects from the end face of the speaker main body 31,
and is detachably and rotatably connected to a fitting hole 39 provided at the center of the end
face of the spacer 41. ing. In addition, the rotation angle is limited to a fixed angle range by the
control member which is not illustrated. Then, by inserting the projection 40 into the insertion
hole 39, the contact 33 and the contact 43 come into contact with each other, and the contact 32
comes into contact with one of the contacts 42A, 42B, 42C.
[0018]
The speaker 30 assembled by using the speaker main body 31 and the spacer 41 as described
above rotates the speaker main body 31 by a predetermined angle in the circumferential
direction, whereby the spacer 41 with respect to the positive side contact 32 of the speaker main
body 31. The plurality of contacts 42A, 42B, 42C connected to the second cord 34 of the second
embodiment can be selectively switched and connected. At this time, the negative side contact 33
of the speaker main body 31 is formed to be long in a circular arc shape, and the rotation of the
speaker main body 31 by a predetermined angle or more is restricted by the restricting member.
The positive contact 32 of the speaker main body 31 does not rotate outside the contact points
42A, 42B, 42C of the spacer 41 without being separated from 43.
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[0019]
According to such a present embodiment, when assembling the speaker 30 by fitting the spacer
41 to the speaker body 31 or after assembling, the speaker body 31 is rotated by a
predetermined angle as required, and the speaker body is assembled. By switching the plurality
of contacts 42A, 42B and 42C with respect to the 31 contacts 32, adjustment of the attenuator
can be easily performed. Therefore, level adjustment can be easily performed.
[0020]
FIG. 8 shows still another embodiment of the present invention, in which the contact of the
second cord 35 of the spacer 41 can be switched continuously (steplessly) with respect to the +
side contact 32 of the speaker main body 31. An example configured in FIG. That is, the − side
contact 33 is disposed at the center of the end face of the speaker main body 31 and the + side
contact 2 around this, while the − contact 43 of the second cord 35 is at the center of the end
face of the spacer 41 A conductor 48 which constitutes a positive contact is arranged in a coil
form around this periphery. Then, in a state in which the end face of the speaker main body 31
and the end face of the spacer 41 are opposed to each other, the speaker 50 is configured to be
rotatably assembled to the spacer 41.
[0021]
According to this embodiment, when the speaker body 31 is rotated, the contact position of the
conductor 48 with the + side contact 32 of the speaker body 31 becomes a contact point. The
contacts can be switched continuously (steplessly) as shown in the equivalent circuit of FIG.
Therefore, the resistance can be switched steplessly, and level adjustment can be performed
easily and finely.
[0022]
FIG. 10 shows an example in which the end face 49 of the spacer 41 is formed to be inclined,
which is convenient when adjusting the mounting angle of the speaker main body 31, and can be
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applied to each embodiment. Further, by providing the indicators 55a and 55b for level
adjustment on the circumferential surface of the speaker 31 and the circumferential surface of
the spacer 41, the user can more easily perform the level adjustment. The polarity, position, type,
number and the like of each contact of the speaker main body and the spacer in each
embodiment are merely an example, and any change can be made according to the purpose, the
application and the like. Also, the assembly structure of the speaker body and the spacer can be
appropriately changed using a known technique.
[0023]
As described above, according to the present invention, it is possible to arbitrarily change the
connection state of each contact where each cord of the spacer is connected to each contact of
the speaker main body. Even after mounting on the vehicle, the input polarity to the speaker
body can be easily changed or the level adjustment can be easily performed.
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