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JPS5782792

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DESCRIPTION JPS5782792
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
speaker, FIG. 2 is a cross-sectional view showing a speaker according to one embodiment of the
speaker of the present invention, and FIG. Fig. 4 is a diagram showing harmonic distortion
characteristics of the speaker according to the related art and the present invention.
????????? ???? -717-, /, 21-10 и и и Flat diaphragm, 22 и и и и и и и и и и и и и и и и и и и и и и и и
coupling cone, 24 и и и и и и и и и resonance stop cap, 25
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
иииииииииииии Vents.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loudspeaker
using a vibrating diaphragm, and in particular, to provide a speaker having less distortion by
eliminating resonance of a cup link cone connecting the diaphragm and the diaphragm. The
conventional loudspeaker of this type is configured as shown in FIG. 1 ??.?, I +, EP, ie, eight
plates with center pole 1 ? 2 -2. Link-like Mcnet 3. Similarly, the frame 6 is connected to the
magnetic circuit 6 constituted by the link-like upper plate 4 and the edge 9 of the flat diaphragm
8 is fixed to the inner edge portion of the frame 6 together with the gasket 7. The cup link cone
10 is coupled, the voice coil 11 is coupled to the central portion of the cup link cone 10, the
middle portion of the voice coil 11 is held by the damper 12, and the lower portion of the voice
coil 11 is the magnetism of the magnetic circuit 6 It was configured to be fitted into the gap 13
without eccentricity. Generally, when the voice coil 11 is directly coupled to the flat plate
diaphragm 8 if the diameter of the nodal circle of the flat plate diaphragm 8 due to the primary
resonance frequency or the diameter of the voice coil 11 is larger, Using the coupling cone 10, to
the flat diaphragm 8 of the cup link cone 1o, the primary coupling same wave number of the
'coupling part, to make the speaker 7 be a non-useless speaker with an upper heck or tip. The
nodes of the flat diaphragm 8 are driven so as to have the same diameter 1 'as the six-node
circle. When the speaker having such a configuration is operated, the same wave number ?
11-05-2019
1
anomalous resonance near and below the resonance same wave number of the cup link cone 10
is caused, and as shown by the solid line in FIG. As a countermeasure, it is considered that
suppressing abnormal resonance by using a material with a thick material of the cup link cone 1o
or changing the specific elastic modulus (K / S) is also considered to be sufficiently young fruit
No, there was an IK point where the sound drops by 10 levels. The present invention eliminates
the above-mentioned conventional deficiencies. Hereinafter, an embodiment of the present
invention will be described in more detail with reference to FIGS. In FIG. 2, 14 is a magnetic
circuit, and this magnetic circuit 14 has a center ball 16 and a boot 16. Link-like Mcnet 17. The
frame 19 is formed by a link-like upper plate 18, and the magnetic circuit 14 is coupled to the
frame 19. The frame 190 edge portion Yc of the frame 190 is the same as the edge 22 of the flat
diaphragm 21 when the gasket 20 is formed. The edges are more bonded and so on.
The cup link cone 23 is joined at the joint line of the second-order resonance on the lower
surface of the flat diaphragm 21, and the resonance cap 24 is attached to the middle part of the
upper surface of the cup link cone 23). It is done. Also, the voice coil 25 is connected to the
middle fire portion of the cup link cone 23, and the middle portion of the voice coil 25 is the
damper 2681? Thus, the lower part of the magnetic circuit 13 is held without being eccentric to
the magnetic gap 27 of the magnetic circuit 13. As described above, by bonding the domeshaped resonant cap 24 made of a material that is light enough to be ignored with respect to the
vibration system Ikichi 1 in the middle part of the cup link cone 23, the abnormality of the cup
link cone 23 The resonance can be blocked. In addition, resonance + h canoso 24. ??????
??????? When the space ?? и h? formed by the flat diaphragm 21 is sealed, it is
necessary to allow the air in this space to flow out to the outside, y 6 ? (as shown in FIG. 3) The
vent hole 28 may be provided on the top of the resonance stop canoso 24. As described above,
since the speaker of the present invention is configured, abnormal vibration of the cup link cone
itself can be prevented, and as indicated by the broken line in FIG. Can reduce bird distortion and
wave distortion, and also: (Cuplic cone O thickness can be reduced to lighten the vibrating fan to
increase sound pressure, and the practical value will increase. It is a thing.
11-05-2019
2
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