JPS5769380

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DESCRIPTION JPS5769380
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view showing an
embodiment of the loudspeaker according to the present invention, FIG. 2 is a schematic cross
sectional view of the loudspeaker of FIG. 1, and FIG. 3 is a loudspeaker of FIG. FIG. 4 is a plan
view of the diaphragm viewed from the front of the speaker, and FIG. 4 is a diagram of the
diaphragm of the coaxial speaker viewed from the front of the speaker. 14, 15.16 ... ring-shaped
diaphragm.
DETAILED DESCRIPTION OF THE INVENTION The invention relates to a loudspeaker. For
example, in a coaxial speaker in which three diaphragms for reproducing a low-pitched sound,
medium-sound reproduction and high-sound reproduction or two diaphragms for low-sound
reproduction and middle-high-sound reproduction are coaxially arranged. , There was a problem
like the conventional wide. That is, specific frequency components of the single wave number
components of the sound wave radiated from each diaphragm cause phase interference with
each other, and a large peak dip on the sound pressure frequency characteristic at this specific
frequency component at-恕 r +-. It is a moment when sound pressure frequency characteristics
are disturbed. The present invention has been made to address one situation, and its object is to
provide a speaker capable of flattening sound pressure frequency characteristics with a very
simple configuration. Between the furnaces, one embodiment of the present invention will be
clamped below with reference to FIG. FIG. 1 is a schematic perspective view of the speaker of this
embodiment. The disclosed speaker is, for example, formed by using three diaphragms for
reproduction of え 1 音 sound reproduction, middle sound reproduction, and high sound
reproduction. In the figure, a reference numeral 1 denotes a support plate for supporting a
speaker's nausea (route) path portion, 12 a frame, 13 a leg for fixing the frame to the support
plate 11, 14 a diaphragm for reproducing bass sound, 15 is a diaphragm for medium sound
reproduction, and 16 is a diaphragm for high sound reproduction. 2 is a schematic crosssectional view of FIG. In the figure, reference numeral 17 denotes a screw for fixing the leg 13 to
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the support plate, and 18 denotes a screw for fixing the plate 12 to the leg 13. Numerals
19.20.21 denote the outer parts of the diaphragms 14.15.16, respectively, and 22 DEG 23.24
denote the inner peripheral edges of the moving plate 14.15.16. The outer W edge 19 is fixed to
the frame 12, and the inner edge 22 and the outer edge 20 are supported by the support 25. The
inner frame, the outer 23 and the outer edge 21 are fixed to the support 26 IrJ: The inner
circumferential surface is fixed to a support 27. ２ｇ、２９、、？ 0 or bobbin connected to the
diaphragm 14, 15 ° 16 respectively. ? １、３２、、？、？ Are respectively wound on bobbins
28 * 292.90. ? ４、．９５、．９６はそれぞれ？ Danno for bin 2F 1.29.30, 37 is a support of
Dan-434. Here, 38 is a permanent magnet, 39 is a yoke, for squeezing the magnetic circuit
portion of diaphragm 14 for bass reproduction. 40 is a pole piece and 4 is a tonno plate. 42 is a
spacing member for separating the yoke 39 from the support plate by a predetermined distance,
and 43 is a screw for fixing the yoke 39 to the support plate 11 and a screw for fixing the I-rubys
40 to the yoke 39. It is.
The same applies to the magnetic circuit portion of the diaphragm 15 for medium sound
reproduction, which is a 45-piece permanent magnet, a 46-piece yoke, 47 is a pole piece, and 48
is a top plate. A spacing member for separating the yoke 46 from the support plate 11 by a
predetermined distance, a screw for fixing the yoke 46 to the support plate 11, and 51 for the
yoke 47? -A screw for fixing the ruby 47; The magnetic circuit portion of the diaphragm 16 for
high-pitched sound reproduction is also a single circuit, and is a 5 ° 2 permanent magnet, 53
yoke, 54 a pole piece, and 55 a top plate. 56 is a spacing member for spacing the yoke 53 to the
support plate 11 by a predetermined distance, 57 is a screw for fixing the yoke 53 to the support
plate 11, and 58 is a screw for fixing the pole piece 54 to the yoke 53. It is. Next, in the section 0
described in the characterizing part of the present invention, in FIG. 3, to is, for example, the
central axis of the frame 12 and, for example, the central axis of the diaphragm 14 coincides with
the central axis t6. L1 * 12 is a central axis of the diaphragm 16.15, which is offset from the
central axis 1 in the radial direction of the speaker, for example, in the direction of the arrow X1
indicated by -1. FIG. 3 is a view of this state as seen from the forward direction of the speaker.
The amount of the displacement of the diaphragm 15.16 in the direction of the arrow Xi
indicated in the evening 1 is different depending on the @ matter of the diaphragm 14.15.16, etc.
The point is emitted from the diaphragm 14.15 ° 16 It is sufficient to set so that specific
frequency components of the wave number components of the sound wave cause phase
interference with each other and the sound pressure frequency characteristic of the speaker is
not disturbed. According to this embodiment, which will be described in detail below, only a
specific frequency component of the last wave number component of the sound wave radiated
from the diaphragm 14.15.16 causes phase interference to spread and spread. Do not let the
diaphragm 14. Since Is, 16 is positioned, the sound pressure frequency characteristics of the
speaker can be flattened. On the other hand, in the coaxial speaker, as shown in FIG. 4, since the
ring-shaped diaphragm 61.62.63 is coaxially disposed, it is emitted from the diaphragm
61.62.63 as described above. Among the frequency components of the sound wave, there is a
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problem that specific frequency components cause phase interference with each other and the
sound pressure frequency characteristic of the speaker is disturbed. In addition, the sound
pressure frequency characteristics of the speaker can be flattened by a simple configuration in
which only the diaphragms 14 and 15.16 are disposed so that the central axes of the fIP moving
plates 14.15 and 16 do not coincide with each other. It also has points. The present invention is
not limited to the above embodiment.
For example, in the previous embodiment, three shooting actions g! Although the case has been
described in which all central axes of 14.15.16 do not coincide with each other, any two
diaphragms are arranged so that the central axes coincide with each other, and only the
remaining one diaphragm is its center. The shaft may be disposed so as to be offset from the
central axis of the two diaphragms. Further, the number of diaphragms of the speaker according
to the contradiction is not limited to three as long as it has a plurality of two or more. The point
is that the present invention has a plurality of diaphragms with different outer peripheral lengths
disposed so as to surround the outer periphery of a short outer peripheral diaphragm with a long
outer diaphragm with an external 11l length, and among the plurality of diaphragms At least the
two diaphragms may be disposed so that their central axes do not coincide with each other. As
described above, according to this invention, it is possible to pray for a speaker that can flatten
the sound pressure frequency characteristic with a very simple configuration.
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