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JPS5769379

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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
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DESCRIPTION JPS5769379
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing one
embodiment of a coaxial speaker according to the present invention, and FIG. 2 is a plan view
showing an essential part of the speaker of FIG. FIG. 3 is a schematic perspective view of another
embodiment of the present invention, and FIGS. 4a and 4b are schematic cross-sectional views of
the speaker of FIG. 12.13, 3.3.3.4.35 ... ring-shaped diaphragm, 29.36 ... equalizer.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coaxial speaker
in which a plurality of diaphragms are coaxially disposed. The conventional coaxial speaker in
which a plurality of diaphragms are coaxially arranged has the following problems. That is, if the
speaker has, for example, a diaphragm for high-pitched sound reproduction and a diaphragm for
low-pitched sound reproduction, the central axes of both moving plates coincide with each other,
so the frequency of the sound wave radiated from the both moving plates Among the
components, the phase interference of a specific frequency component is emphasized, and the
sound pressure frequency characteristics of the speaker 7 are broken. The present invention has
been made to address the above-mentioned circumstances, and a very simple configuration
allows specific frequency components of the frequency components of the sound waves radiated
from the respective diaphragms to cause phase interference with each other, and An object of the
present invention is to provide a coaxial speaker which can prevent the sound pressure
frequency characteristic from being disturbed. The embodiments of this article will be described
in detail below with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a socalled two-in-one coaxial type speaker having, for example, two diaphragms for low-pitched
sound reproduction and middle-high-pitched sound reproduction. In the figure, 1 is a frame, 12 is
a diaphragm for bass reproduction, 13 is a diaphragm for medium and high pitch reproduction,
14.15 is an outer peripheral edge of the diaphragm 12.13, and 16 ° is 17 for the diaphragm
12.13. Inner circumference edge, 18 is a support of outer circumference edge 15, inner
circumference edge 16, 19 is a support of inner circumference edge 17, 20 ° is a bobbin
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connected to diaphragm 12.18, 22.23 is a screw bin 12 It is wound around .13, but it is a chair
coil. 24 is a permanent magnet, 25 is a yoke, 26 is a pole piece, and 27 is a pole piece and plate.
In the illustrated configuration, the diaphragm 12.13 is driven by one permanent magnet 24.
That is, in the permanent magnet 24, a through hole 28 is formed at a substantially central
portion of the magnetic pole surface in a direction connecting both magnetic pole directions, and
the pole piece 26 is inserted into the xA hole 28. Then, if the magnetic poles of the permanent
magnet 24 are set as shown in FIG. 1, a magnetic path in the direction indicated by the arrow
X5tX is formed. In this case, the pole piece / plate 27 acts as a plate in the sense of the magnetic
flux in the direction of the arrow X1 and acts on the pole piece 17 with respect to the magnetic
flux in the direction of the arrow X :. Then, the vibrating plate 13 is driven by the magnetic flux
passing through the magnetic path in the arrow X1 direction shown in FIG. 1, and the vibration &
12 is driven by the magnetic flux passing through the magnetic path in the arrow X3 direction.
Next, the features of the present invention will be described.
In FIG. 1, reference numeral 29 denotes, for example, a substantially conical equalizer. The
equalizer 29 is fixed to the support 19 in a state of being slightly floating from the front surface
of the diaphragm 13 by, for example, a projection Z9JVc provided on the lower surface in the
drawing. The magnitude of the protrusion 291 is the central axis of the equalizer 29. Therefore,
the central axis to of the equalizer 29 is the central axis of the diaphragm 12.13. It is eccentric
from FIG. 2 is a plan view of the speaker as viewed from the front thereof, showing only the
diaphragms 12 and 13 and the equalizer 29. As shown in FIG. As shown, the equalizer 29 covers,
for example, only a part of the front surface of the diaphragm 12 so as to be asymmetric with
respect to the central axis t1 of the diaphragm 12. According to this embodiment described
above in detail, the following effects can be obtained. Sound waves radiated from the diaphragm
12.13 by appropriately designing the shape of the overlapping surface of the equalizer 29 and
the front surface of the diaphragm 13 so as to be noncircular with respect to the central axis of
the diaphragm 13. The sound pressure frequency characteristic of the speaker is flattened
without the phase interference of a specific frequency component of the frequency components
being emphasized. By the way, in order to prevent the phase interference of a specific frequency
component from being emphasized in the coaxial speaker, it is conceivable to arrange the
diaphragms 12.13 so that the central axes of the gears do not coincide with each other. .
However, the diaphragm 12.13 is also moved to one permanent magnet 24 like a speaker
configured as shown in FIG. In other words, in a configuration in which the magnetic circuit of
the diaphragm 12.13 is a shared magnetic circuit, it is impossible to arrange the diaphragms
12.13 so that their central axes do not coincide with each other. Therefore, if the equalizer 29 is
provided asymmetrically to the central axis t1 of the diaphragm 13 as in this embodiment, it is
equivalent to disposing the diaphragms 12.13 so that the central axes do not coincide with each
other. Thus, the sound pressure frequency characteristic of the speaker can be flattened, and it is
also possible to realize with a very simple human interface in which the method of overlapping
the equalizer 290 with the diaphragm 13 is appropriately set. The present invention is not
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limited to the above embodiment. For example, in the embodiment described above, the case
where the embodiment is applied to a two-in-one coaxial type speaker will be described, or a
three-in-one system having three diaphragms for bass reproduction, middle sound reproduction,
and high-tone reproduction Of course, the present invention may be applied to a coaxial speaker.
FIG. 14v1 (a), (b) show an example in the case of carrying out this invention to the coaxial type
spill force of the three-in-one system respectively.
Briefly explaining this coaxial speaker, in FIG. 3, 30 is a support plate for supporting the
magnetic circuit portion of the speaker, 31 is a frame, and 32 is a leg for fixing the frame to the
support plate 3 33 is a diaphragm for low-pitched sound reproduction, 34 is a diaphragm for
medium-sound reproduction, and 36 is a diaphragm for high-pitched sound reproduction. また
36はイコライザである。 In FIG. 4 (■), 37 is a screw for fixing the leg 33 to the support plate
31, and 38 is a screw for fixing the plate 32 to the leg 32. 39 ° 40.41 are diaphragms 33. J4, 35
perimeter edge, 42, 43. 44 are diaphragms, respectively? It is the inner circumference edge of 3,
34 and J5. The outer paper edge 39 is fixed to the frame 31, the inner circumferential edge 42
and the outer circumferential edge 4o are fixed to the support 45, and the inner circumferential
edge 43 and the outer circumferential edge 41 are identified to the support 46, and the inner
circumferential edge 44 is It is fixed + to the support 47. One peak on 48.49.50, the diaphragm
33 ° 34,. 95K connected bobbins, 51, 52. 53 is a voice coil wound around the bobbins 48 and
49.50, 54 and 55.56 are JC 7'1 and the dampers for the bobbins 4g and 49.50, and 52 is a
support of the damper 54. Here, the hunting circuit portion of the low-pitched sound
reproduction diaphragm 33 will be described. 58 is a permanent magnet, 59 is a yoke, 60 is a
pole piece, and 61 is a tozzo plate. 62 is a spacing member for separating the yoke 59 from the
support plate 30 by a predetermined distance, 63 is a screw for fixing the yoke 59 to the support
plate 30, 64 is a screw for fixing the pole piece 60 to the yoke 59 is there. Next, the magnetic
circuit of the diaphragm 34. 35 will be described with reference to FIG. 4 (b). In this embodiment,
the magnetic circuit of the diaphragm 34.35 is a common magnetic circuit. In the figure, 71 is a
first yoke, 72 is a permanent magnet, 23 is a pole piece, 74 is a pole piece and plate, 75 is a
plate, 76 is a second yoke, 77 is a first yoke 2 and a support plate 30 , A screw 78 for fixing the
pole piece 73 to the first yoke 71, 79 a screw for fixing the second yoke 26 to the coke 21 of a.1,
80 a second yoke It is a screw which fixes plate 75 to 76. In the above configuration, assuming
that the magnetic poles of the permanent magnet 72 are set as shown, a magnetic path in the
direction of the arrow X1 + X1 is formed. And, as shown in the drawing, the iripe 36 which is the
feature of this invention is a part of the front surface of the diaphragm 35 as if it is not
asymmetric with respect to the central axis of the diaphragm.
(Even if it is applied to such a three-in-one coaxial type speaker, it is possible to obtain the same
kind of fruit as Q% application ν 1 (and the same kind of fruit). In the above description, the f14
is described so that the innermost diaphragm is squeezed so that the equalizer may squeeze. It
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seems that it overlaps only with the diaphragm or the middle diaphragm. (Similarly it is 4
degrees, of course, the equalizer and the meaning of this device and yes 7) Not only the function
as the immersion equalizer but also the speaker Of course, it has wrinkles and ability as a
decorative member for enhancing the design of the front, and also includes Q. Needless to say,
the present invention may be applied to a coaxial speaker in which a dedicated single channel is
provided for each of the carrier 111 ′ ′ and the plate. Further, for example, in the equalizer
having the configuration as in the previous embodiment, this may be disposed in either a
rotatable or fixed state. In this case, setting as in the former case has the advantage that the user
can freely change the overlapping position of the equalizer 36 and the diaphragm 35. On the
other hand, if the latter setting is made, the equalizer 36 hardly vibrates due to the sound wave
emitted 7 'from the diaphragm, so the vibration of the equalizer 36 eliminates the shadow on the
same pressure characteristics. it Do ↓ · can, field B for use equalizer user to be b prepared
second setting in or be freely indispensable, are not overlapping position 11 bamboo with an
equalizer and the diaphragm, 虐宜 crotch shape of the equalizer Work is also taken to make it
possible to freely change the appearance of a game by setting it. As described above, it is
possible to provide the coaxial type speaker which is very easy to be defeated and that the sound
pressure and wave number characteristics are not disturbed.
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