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JPS5579188

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DESCRIPTION JPS5579188
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 3 are cross-sectional views of the main
part showing a conventional loudspeaker with a riser cone, and FIG. 4 is a half sectional view
showing one embodiment of a loudspeaker with a riser cone of the present invention. FIG. 5 is a
cross-sectional view of the relevant part. 7 иииии Magnetic circuit, 12 и и и и и и и и и и и и и и и Main
diaphragm, и и и и и и и и и и и и и и и и и и и и Damper, 17 ииииииии Magnetic gap, 18 и и и и и и и Dust cap, 18b и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и flat portion, 19 и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и magnetic gap, 18 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
flat portion, 19 и и и и with cone ?
Detailed Description of the Invention The present invention is easy to assemble and relates to a
loudspeaker with riser cone with excellent reproduction characteristics with little mechanical loss
between the riser cone and the voice coil. (7) f, S, Ep и Generally, a speaker with a riser cone is
often used to widen the reproduction frequency band. A conventional loudspeaker with a riser
cone is configured as shown in FIGS. 1 to 3. That is, as shown in FIG. 1, the riser cone 2 to which
the dust cap 1 is attached is attached to the upper inner side of the voice coil 3, and the main
diaphragm 4 and the damper 6 are attached to the outer side of the voice coil 3 to constitute a
vibrating portion. It is done. With such a configuration, the positioning of the riser cone 2 can be
defined by the dimensions of the voice coil 3, but it is difficult to perform the work of bonding
the wither 72 and the voice coil 3, and in particular, the adhesive to be bonded is the voice coil It
hardened by flowing down the inner wall of No. 3 and this hardened adhesive had a high
possibility of generating an abnormal sound due to the gap grinding on the magnetic gap of the
magnetic circuit at the time of operation as a speaker. Further, the one shown in FIG. 2 is
configured by bonding the dust cap 1 (r attached ff the riser cone 2 to the-upper outside 1 of the
voice coil 3). 3 With this configuration, the positioning of the riser cone 2 and the voice coil 3 is
difficult, and as a result, it is difficult to maintain a constant distance between the riser cone 2
and the main diaphragm 4 and the sound pressure frequency characteristics vary. There was a
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drawback that Furthermore, although what is shown in FIG. 3 is provided with a hooked portion
6 at the central portion of the riser cone 2 and this V-shaped portion 6 tries to measure the
positioning with the voice coil 3, The character part 6 works as a corrugation to increase
mechanical loss, and can not be obtained in the high frequency range on sound frequency
characteristics, and the meaning of using the riser cone 2 is halved and becomes one. The The
present invention eliminates the above-mentioned conventional drawbacks. Hereinafter, an
embodiment of the present invention will be described with reference to FIG. 4 and FIG. A
magnetic circuit 7 is constituted by a plate 9 having a center ball 8, a ring-shaped McNesaw 10,
and a ring-shaped upper plate 11 as well. A frame 12 is connected to the magnetic circuit 7, and
a peripheral portion of a main diaphragm 14 having a cone shape is connected to a peripheral
portion of the frame 12 by bonding or the like.
The outer side of the soil portion of the voice coil 15 is coupled to the central portion of the main
diaphragm 14 with an adhesive or the like, and the central portion of the damper 16 has the
peripheral portion fixed to the frame 12 outside the middle portion of the voice coil 16 The lower
portion of the voice coil 15 is embedded in the magnetic gap 17 of the magnetic circuit 7 without
eccentricity. Then, with the outside of the upper end portion of the voice coil 16, a wether co-719
having a dust cap 18 coupled to the central portion is bonded by an adhesive. The dust cap 18 is
provided with a flat portion 18bi at the periphery of the dome portion 18a, and an inclined
portion 18c adhesively coupled to the inclined portion of the riser cone 19 is provided on the
outer periphery of the flat portion 18b. The lower surface of the upper surface portion 18b is
designed to be positioned at the upper end of the joint portion between the riser cone 19 and the
voice coil 15 of the N) 6 coer with the voice coil 15 of N). Therefore, when the upper end of the
voice coil 16 is brought into contact with the lower surface of the flat portion 18b of the dust cap
18 when the riser cone 19 is assembled to the voice coil 15, the position restriction of the riser
cone 19 with respect to the voice coil 15 is completely It will be done. As described above, since
the speaker with a riser cone according to the present invention is configured, positioning of the
riser cone can be accurately performed with respect to the voice coil, and as a result, the position
of the riser cone with respect to the main diaphragm is also accurate and the sound pressure
frequency characteristic Since the riser cone is adhesively bonded to the outside of the voice coil,
the assembly operation is easy and it is possible to prevent the adhesive from flowing down and
causing the occurrence of gap rubbing, Furthermore, since the riser cone is directly coupled to
the voice coil, mechanical loss at the coupling portion is also small, and high frequencies of 1-j
and 1/6 characteristics at sound pressure frequency should be excellent. It has many advantages,
such as the ability to
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