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JP2001069588

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2001069588
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electroacoustic transducer mainly using a full drive flat speaker as a driver, and in particular to a
loudspeaker system (hereinafter referred to as a loudspeaker) which is a thin electroacoustic
transducer. (Referred to as a system).
[0002]
2. Description of the Related Art In a speaker system 20 conventionally configured by attaching a
speaker unit 1 to a speaker box 2, as shown in FIGS. 5 (a) and 5 (b) as a front view and a side
view, respectively. In general, the speaker unit 1 is attached to the front baffle 4 by means of
screws 51 to 54 as fixing means. This method does not have any problem in the usual speaker
system 3 in which the strength of the front baffle 4 can be sufficient.
[0003]
However, this premise does not hold in a thin speaker system which is a special form intended
for hanging on a wall and light weight. 6 is a back baffle. That is, if this point is explained taking
a wall speaker as an example, the wall speaker may not have a sufficient thickness for the front
baffle 4 due to the relation between the depth dimension and the necessary internal volume for
the purpose. At present, materials which are not suitable for the purpose of use are used while
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leaving strength problems for convenience. This results in a reduction in the output of the low
output range (piston range) of the speaker, resulting in the failure to obtain a desired sound
pressure frequency characteristic.
[0004]
Therefore, what the present invention is to solve is to compensate for the lack of strength of the
front baffle 4 and the back baffle 6 under these limitations by means of the speaker mounting
method. Thus, it is possible to provide, for example, a thin speaker system that can prevent a
drop in the output of the low output range (piston range) of the speaker and obtain desired
sound pressure frequency characteristics.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above
problems, and as a first invention, an electroacoustic system having a front baffle 4, a speaker
unit 1, and a back baffle 6 is provided. A transducer, wherein the front baffle 4 is configured to
be held between the speaker unit 1 and the rear baffle 6 as a second invention, the front baffle 4,
the speaker unit 1, and And the back baffle 6. The speaker unit 1 holds the front baffle 4
between the speaker unit 1 and the back baffle 6 by fixing means 111, 121 from the back baffle
6 side. It is intended to provide an electroacoustic transducer 10 characterized in that it is
configured as described above.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an electroacoustic
transducer 10 according to the present invention will be described below with reference to FIGS.
The same parts as in the prior art are assigned the same reference numerals and detailed
explanations thereof will be omitted.
Moreover, in FIGS. 1 to 3, (a) is a front view, and (b) is a side view. As shown in FIG. 1 (b), the
back baffle 6 is provided with projections 61 to 64 (only 61 and 62 are shown in FIG. 1 for the
sake of convenience) in which a female screw (not shown) is engraved. There is. The speaker unit
1 is provided with a diaphragm (not shown) substantially at the center thereof, and mounting
screws 51 to 54, which are fixing means from the top of the front baffle 4 at the four corners of
the outer peripheral portion not constituting the diaphragm It is fixed there by screwing with the
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not-shown female screw inscribed in 61-64. On the other hand, the rear baffle 6 has a female
screw and screw (not shown) in which mounting screws 71 and 74 (only 71 and 72 are shown
for convenience in FIG. 1 for convenience) which are fixing means are cut from the upper part
thereof. It is made to be fixed there by being united. 9 is a magnetic circuit to be described later.
[0007]
Further, in the present invention, although the example in which the projections 61 to 64 are
provided on the back baffle 6 has been described, the present invention is not necessarily limited
to this, and of course may be provided on the front baffle 4 Furthermore, the front baffle 4 and
the rear baffle 6 are not separately provided, and are separately formed, and it is of course
possible to insert them between the front baffle 4 and the rear baffle 6 at the time of assembly.
[0008]
According to the structure of the present invention, since the front baffle 4 is sandwiched
between the speaker unit 1 and the back baffle 6, the strength similar to the honeycomb
structure of the front baffle 4, the speaker unit 1 and the back baffle 6 is obtained. Even if the
front baffle 4 and the back baffle 6 adopt materials and thicknesses which are insufficient in
strength, it is possible to prevent an output reduction in sound pressure frequency characteristics
from occurring.
[0009]
Further, as shown in the side view of FIG. 2 (b), a female screw (not shown) is provided on the
fixed portions 81, 82 of the frame 8 provided with the magnetic circuit 9 therein so as to be
attached to the front baffle 4. The mounting screws 111 and 121, which are fixing means from
the top of the back baffle 6, penetrate the inside of the magnetic circuit 9 using the female screw
and the fixing portion 81 provided on the frame 8 described above, It can also be realized by the
method of being screwed with 82, or by having the structure of both FIG. 1 and FIG.
[0010]
FIG. 3 (b) shows an embodiment having the structure shown in FIGS. 1 and 2 shown in the side
view.
A frame 8 for installing the diaphragm 13 is fixed to a magnetic circuit 9 composed of a magnet,
a pole piece, and a plate (not shown), and the frame 8 sandwiches the front baffle 4 as described
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above. 6 are fixed by mounting screws 111 and 121 which are fixing means from the upper side.
At this time, four out of eight screw holes prepared for fixing the magnetic circuit 9 to the frame
8 are fixed to the frame 8 so as to penetrate the inside of the magnetic circuit 9 from the back
baffle 6. ing.
Therefore, the strength is also stronger.
[0011]
Further, as described above, the front baffle 4 and the back baffle 6 are screwed with the
projections 61 to 64 provided with female screws formed therein from the top of the back baffle
6 by the mounting screws 71 and 74. Of course, it is fixed by being united.
[0012]
FIG. 4 shows the sound pressure frequency characteristics of the electroacoustic transducer
completed by the conventional mounting method not adopting the structure of the present
invention and the sound pressure frequency of the electroacoustic transducer completed by the
novel mounting method according to the present invention It is the sound pressure frequency
characteristic figure which showed the difference in the characteristic.
As apparent from FIG. 4, according to the configuration of the present invention, the output
reduction in the low output range (piston zone) can be prevented, and a desired sound pressure
frequency characteristic can be obtained.
[0013]
As described above in detail, according to the electro-acoustic transducer of the present
invention, it is an electro-acoustic transducer having a front baffle, a speaker unit, and a back
baffle, which is characterized in that The baffle is configured to be held between the speaker unit
and the rear baffle, so that it is possible to prevent a drop in the output of the low output range
(piston zone) of the speaker and obtain desired sound pressure frequency characteristics.
[0014]
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Brief description of the drawings
[0015]
1 is an explanatory view showing an embodiment of the electro-acoustic transducer according to
the present invention.
[0016]
2 is an explanatory view showing another embodiment of the electro-acoustic transducer
according to the present invention.
[0017]
3 is an explanatory view showing another embodiment of the electro-acoustic transducer
according to the present invention.
[0018]
4 is a sound pressure frequency characteristic diagram showing the sound pressure frequency
characteristics of the conventional electro-acoustic transducer and the electro-acoustic
transducer according to the present invention.
[0019]
5 is an explanatory view showing an embodiment of a conventional electro-acoustic transducer.
[0020]
Explanation of sign
[0021]
DESCRIPTION OF SYMBOLS 1 Speaker unit 4 Front baffle 6 Back baffle 10 Electroacoustic
transducer 111, 121 Fixing means
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