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JP3145100

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP3145100
Abstract: To provide dual frequency coaxial headphones. SOLUTION: A dual frequency coaxial
headphone includes a speaker frame 1, a common yoke 2, a high frequency speaker part 3 and a
low frequency speaker part 4, and the high frequency speaker part 3 and the low frequency
speaker part 4 are coaxially installed inside and outside the common yoke 2. And the same axis
as the central opening 111 of the speaker frame 1. Since the permanent magnet 31 of the high
frequency speaker part 3 and the ring magnet 41 of the low frequency speaker part 4 have
opposite polarity, the voice band of the low frequency speaker part 4 is reversed through the
sound passage annular tank and the voice of the high frequency speaker part 3 It has the same
polarity as the band and is output synchronously. Therefore, different voice bands of high
frequency speaker part 3 and low frequency speaker part 4 are separated, and the problem of
adjustment distortion of high and low voice bands can be effectively solved and the volume of
headphones can be minimized. . [Selected figure] Figure 2
Dual frequency coaxial headphones
[0001]
The present invention relates to a headphone structure. In particular, it relates to headphones
applied to dual frequency coaxial.
[0002]
02-05-2019
1
As shown in FIG. 1 which is a cross-sectional view of a known headphone, the known headphone
9 includes a headphone case 90, a signal cable 91, a vibrating membrane 92, a permanent
magnet 93, a voice coil 94, a pole piece 95, and a yoke 96. As shown in FIG. 1, the signal cable
91, the vibrating membrane 92, the permanent magnet 93, the voice coil 94, the pole piece 95,
and the yoke 96 are accommodated in the headphone case 90 respectively. The voice coil 94 is
assembled on the vibrating membrane 92 and corresponds to an annular shape outside the
periphery of the permanent magnet 93, but maintains a radial gap with the pole piece 95, and
the permanent magnet 93 is the pole piece 95. And the yoke 96. The signal cable 91 and the
voice coil 94 are electrically connected, and when a voice band signal is input to the voice coil 94
through the signal cable 91, the voice coil 94 generates a magnetic field by an electromagnetic
effect. The magnetic field further generates a magnetic interaction with the pole piece 95 to
vibrate the vibrating membrane 92 so that the voice band signal is converted to a voice band
sound wave and output.
[0003]
In the known structure, a general voice band signal includes high and low voice band portions, so
it vibrates on the same diaphragm 92 and simultaneously generates high and low voice band
sound waves, but high and low voice band sound waves Because of the characteristics of
different wavelengths and amplitudes, the same vibrating membrane 92 can not distinguish
different characteristics clearly. For this reason, there is a drawback that often causes adjustment
distortion of high and low voice bands, and the sound can not be expressed clearly. Also, if high
and low frequency speakers are installed, and high and low voice band signals are reproduced
respectively, the volume of the known headphones becomes large and can not be adapted to the
size of the current headphones, which makes it difficult for industry personnel There is.
[0004]
The object of the present invention is to provide a dual frequency coaxial headphone which
solves the problems of the known structure.
[0005]
The dual frequency coaxial headphones include a speaker frame, a shared yoke, a high frequency
speaker part, a low frequency speaker part, and the speaker frame is a front board. ), Peripheral
wall is annularly installed around the outer periphery of the front plate, the inner surface of the
peripheral wall and the inner surface of the front plate surround together to form a housing
installation space, and the front plate The through holes are installed through the central
opening, and the plurality of sound passing holes respectively communicate with the
02-05-2019
2
accommodation installation space, and the plurality of sound through holes are installed on at
least a part of the front plate around the outer periphery of the central opening.
[0006]
The common yoke has a cap shape and is housed and installed in the housing space of the
speaker frame, and the common yoke includes a cap crown and a cap edge, and the cap edge is
annular on the outer periphery of the cap crown , The cap edge is fixed to the inner surface of
the front plate of the speaker frame, the cap crown coaxially corresponds to the central opening
of the front plate, away from the front plate, and the cap crown is concave The high frequency
speaker part includes a permanent magnet, pole piece, high frequency voice coil, high frequency
diaphragm, and the permanent magnet is a cap of the common yoke. The permanent magnet is
installed in the crown, the permanent magnet is installed between the pole piece and the inner
concave surface of the common yoke, the high frequency voice coil is installed on the high
frequency vibrating membrane in combination, The high frequency vibrating membrane outer
periphery is combined and installed on the front plate of the outer periphery of the center
opening of the speaker frame.
[0007]
The low frequency speaker part includes an annular magnet, an annular pole piece, a low
frequency voice coil, a low frequency vibrating membrane, the annular magnet is fitted outside
the cap crown of the shared yoke, and the annular magnet is a cap of the annular pole piece and
the shared yoke Sandwiched between the edges, the annular magnet has the opposite polarity to
the pole piece of the high frequency speaker part, the low frequency voice coil is combined and
installed on the low frequency diaphragm and housed within the ring of the annular pole piece
The low frequency diaphragm outer periphery is combined and installed on the inner surface of
the rear end edge of the speaker frame peripheral wall.
[0008]
The shared yoke and the low frequency speaker part are both smaller than the inner surface of
the peripheral wall of the speaker frame and mutually separate the sound passage annular tank,
and the sound passage annular tank is disposed in the plurality of sound passage holes of the
speaker frame. Opening: The high frequency speaker part and the low frequency speaker part
can be coaxially installed on the inside and the outside of the shared yoke, and installed coaxially
with the central opening of the speaker frame.
[0009]
Since the permanent magnet of the high frequency speaker part and the ring magnet of the low
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3
frequency speaker part have opposite polarity, the voice band of the low frequency speaker part
is reversed through the sound passage annular tank, and the same polarity as the voice band of
the high frequency speaker part And the different voice bands of the high frequency speaker part
and the low frequency speaker part are separated, and the problem of adjustment distortion of
high and low voice bands can be effectively solved, and the volume of the headphones can be It
can also be minimized.
[0010]
The dual frequency coaxial headphone further includes a headphone case, a signal cable, the
headphone case includes an earplug, and the headphone case includes an ear cover, and the dual
frequency coaxial headphone further includes a circuit board or a frequency dividing circuit, The
high frequency vibration film includes an inner concave ring and an outer concave ring, the high
frequency voice coil is combined with the inner concave ring, and the outer concave ring is
combined and installed on the front plate of the central opening of the speaker frame The low
frequency vibration film includes an inner concave ring and an outer concave ring, and the low
frequency voice coil is combined with the inner concave ring, and the outer concave ring is
combined on the inner surface of the rear end edge of the peripheral wall of the speaker frame
The dual frequency coaxial headphone includes a fixed ring and is combined and placed on the
inner surface of the rear end edge of the speaker frame peripheral wall.
[0011]
The present invention separates different voice bands of high frequency speaker part and low
frequency speaker part, and can effectively solve the adjustment distortion problem of high and
low voice bands, and can also minimize the volume of headphones.
[0012]
As shown in FIG. 2 which is an exploded view of the first preferred embodiment of the present
invention and FIG. 3 which is a cross-sectional view of the first preferred embodiment of the
present invention, the dual frequency coaxial headphones of this embodiment include a speaker
frame 1 and a common yoke 2. , High frequency speaker part 3 and low frequency speaker part
4 are included.
The speaker frame 1 includes a front plate 11 and a peripheral wall 12.
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4
The peripheral wall 12 is annularly installed on the outer peripheral edge of the front plate 11,
and the inner surface 120 of the peripheral wall 12 cooperates with the inner surface 110 of the
front plate 11 to form a housing installation space 13.
The front plate 11 penetrates through the central opening 111, the plurality of sound passing
holes 112 communicate with the accommodation space 13, and the plurality of sound passing
holes 112 are equidistant from the outer edge of the central opening 111, respectively. It is
installed on at least a part of the front plate 11.
[0013]
The common yoke 2 has a cap shape and is accommodated in the accommodation space 13 of
the speaker frame 1, and the common yoke 2 includes a cap crown 21 and a cap edge 22.
The cap edge 22 is annularly installed on the outer peripheral edge of the cap crown 21, and the
cap edge 22 is fixed to the inner surface 110 of the front plate 11 of the speaker frame 1.
The cap crown 21 corresponds coaxially to the central opening 111 of the front plate 11 and is
separated from the front plate 11.
The cap crown 21 includes an inner concave surface 211 and an outer convex surface 212.
[0014]
The high frequency speaker part 3 includes a permanent magnet 31, a pole piece 32, a high
frequency voice coil 33, and a high frequency vibrating film 34.
The permanent magnet 31 is housed and installed in the cap crown portion 21 of the common
yoke 2, and the permanent magnet 31 is interposed between the pole piece 32 and the inner
concave surface 211 of the common yoke 2.
02-05-2019
5
The high frequency voice coil 33 is installed in combination on the high frequency vibrating film
34, and annularly corresponds to the outside of the periphery of the pole piece 32, but maintains
a gap with the pole piece 32 in the radial direction. And concentrate the magnetism of the
permanent magnet 31 between the pole piece 32 and the pole piece 32. The outer periphery of
the high frequency vibration film 34 is assembled and installed on the front plate 11 of the outer
periphery of the central opening 111 of the speaker frame 1. In the present embodiment, the
high frequency vibrating film 34 includes an inner concave ring 341 and an outer concave ring
342, the high frequency voice coil 33 is combined and installed on the inner concave ring 341,
and the outer concave ring 342 is the speaker frame. (1) The combination is installed on the
front plate 11 on the periphery of the central opening 111.
[0015]
The low frequency speaker part 4 includes an annular magnet 41, an annular pole piece 42, a
low frequency voice coil 43, and a low frequency vibrating film 44. The annular magnet 41 is
fitted on the outside of the cap crown 21 of the common yoke 2, and the annular magnet 41 is
interposed between the annular pole piece 42 and the cap edge 22 of the common yoke 2. The
annular magnet 41 and the permanent magnet 31 of the high frequency speaker part 3 have
opposite polarities. The low frequency voice coil 43 is mounted on the low frequency vibrating
membrane 44 in combination, housed correspondingly in the ring of the annular pole piece 42,
and located between the common yoke 2 and the cap crown 21. Furthermore, the annular pole
piece 42 holds a gap in the radial direction, thereby strengthening and concentrating the
magnetism of the annular magnet 41 between the low frequency voice coil 43 and the annular
pole piece 42. The outer periphery of the low frequency vibration film 44 is combined and
installed on the inner surface 120 of the rear end edge of the speaker frame 1 peripheral wall
12.
[0016]
In this embodiment, the low frequency vibration film 44 includes an inner concave ring 441 and
an outer concave ring 442, the low frequency voice coil 43 is combined and installed on the
inner concave ring 441, and the outer concave ring 442 is The speaker frame 1 is assembled and
installed on the inner surface 120 of the rear end edge of the peripheral wall 12. The external
shape of the common yoke 2 and the low frequency speaker part 4 are both smaller than the
inner surface 120 of the peripheral wall 12 of the speaker frame 1 and the sound passage
annular chamber 46 is mutually separated. It leads to one of the plurality of sound passage holes
112.
02-05-2019
6
[0017]
As shown in FIG. 2, the dual frequency coaxial headphone of the present embodiment further
includes a circuit board 5 and is mounted on the speaker frame 1 in combination. The dual
frequency coaxial headphone further includes a frequency dividing circuit 51. The frequency
dividing circuit 51 separates the frequency mix input signal into a high frequency output signal
and a low frequency output signal, and provides and uses a high frequency voice coil 33 and a
low frequency voice coil 43, respectively, which are integrated in the circuit board 5 It is best to
reduce the size and weight. As shown in FIGS. 2 and 3, the dual frequency coaxial headphone of
this embodiment includes a fixed ring 45. The fixing ring 45 is combined and installed on the
inner surface 120 of the rear end edge of the peripheral wall 12 of the speaker frame 1 to fix the
low frequency vibrating film 44.
[0018]
As shown in FIG. 3, when the listener's ear 82 is used as a reference, the magnetism of the
permanent magnet 31 of the high frequency speaker part 3 is the SN pole, and the polarity of the
annular magnet 41 of the low frequency speaker part 4 is the NS pole. , Its polarity is opposite.
Moreover, the voice band of the low frequency speaker part 4 passes through the sound passage
annular tank 46 and becomes opposite polarity, and becomes the same polarity as the voice band
of the high frequency speaker part 3 and is synchronously output. In this embodiment, mainly
the high frequency speaker part 3 and the low frequency speaker part 4 are coaxially installed
on the inner concave surface 211 and the outer convex surface 212 of the cap crown 21 of the
common yoke 2, and the central opening of the speaker frame 1 Install on the same axis as 111.
In addition, since the high frequency speaker part 3 permanent magnet 31 and the ring magnet
41 of the low frequency speaker part 4 have opposite polarities, the voice band of the low
frequency speaker part 4 passes through the sound passage annular tank 46 and has the
opposite polarity. It becomes the same polarity as the voice band of the high frequency speaker
part 3 and is synchronously output. Thus, different voice bands of the high frequency speaker
part 3 and the low frequency speaker part 4 can be separated to effectively solve the problem of
adjustment distortion of high and low voice bands, and minimize the volume of headphones. It
can also be done.
[0019]
02-05-2019
7
As shown in FIG. 4 which is a combination view of the first preferred embodiment of the present
invention, the dual frequency coaxial headphone of the present embodiment further includes a
headphone case 6 and a signal cable 61. The speaker frame 1 is accommodated in the
headphone case 6, and the signal cable 61 is electrically connected to the frequency dividing
circuit 51. Thereby, the frequency dividing circuit 51 provides a mixed frequency input signal.
[0020]
As shown in FIG. 5, which is a cross-sectional view of the second preferred embodiment of the
present invention, the structure of the present embodiment is approximately the same as the first
embodiment. The difference is that the headphone case 7 is of an earphone type, and therefore
includes an earplug 71. As shown in FIG. 6, which is a combination view of the third preferred
embodiment of the present invention, and in FIG. 7, which is a cross-sectional view of the third
preferred embodiment of the present invention, the structure of the present embodiment is
approximately the same as the first embodiment. The difference is that the headphone case 8 is
full cover type, and therefore includes the ear cover 81.
[0021]
It is sectional drawing of a well-known structure. FIG. 1 is an exploded view of a first preferred
embodiment of the present invention. FIG. 1 is a cross-sectional view of a first preferred
embodiment of the present invention. FIG. 1 is a combination view of a first preferred
embodiment of the present invention. FIG. 2 is a cross-sectional view of a second preferred
embodiment of the present invention. FIG. 7 is a combination view of a third preferred
embodiment of the present invention. FIG. 7 is a cross-sectional view of a third preferred
embodiment of the present invention.
Explanation of sign
[0022]
DESCRIPTION OF SYMBOLS 1 speaker frame 11 front plate 111 central opening 112 sound
passage hole 12 peripheral wall 110 inner surface 120 inner surface 13 accommodation
installation space 2 common yoke 21 cap crown 22 cap edge 211 inner concave 212 outer
convex 3 high frequency speaker part 31 permanent magnet 32 Pole piece 33 High frequency
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voice coil 34 High frequency diaphragm 341 inner concave ring 342 outer concave ring 4 low
frequency speaker part 41 annular magnet 42 annular pole piece 43 low frequency voice coil 44
low frequency diaphragm 441 inner concave ring 442 outer concave ring 45 fixed Ring 46
Sound passage annular tank 5 Circuit board 51 Frequency division circuit 6 Headphone case 61
Signal cable 7 Headphone case 71 Earplug 8 Headphone case 81 Ear cover 82 Ear 9 Headphone
90 Headphone case 91 Signal cable 9 2 vibrating membrane 93 permanent magnet 94 voice coil
95 pole piece 96 yoke
02-05-2019
9
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