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DESCRIPTION JPS56114197

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DESCRIPTION JPS56114197
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front cross-sectional view of a conventional
electrodynamic speaker, FIG. 2 is a front cross-sectional view of the electrodynamic speaker in
one embodiment of the present invention, and FIGS. It is the top view and front sectional drawing
of the resin molding of the flame | frame which comprises the speaker, and a damper. 16
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии ? 22 ..... Magnetic gap.
[Detailed description of the invention] In the present invention, the frame and the damper are
integrally molded by resin to improve the position of the damper with respect to the frame @
accuracy, and reduce the number of steps for installing the damper on the frame @ Bxe -A threecharacter insertion that provides a force. Referring to FIG. 1, a conventional electrodynamic
loudspeaker is illustrated in FIG. 1. A center pole 1 and magnets 2-7 disposed under the center
pole 1-7, 7- 9 2 '2 Are contained in the inside of the yoke 3 to form the magnetic circuit 4, the
frame 5 is fixed on the yoke 3, the peripheral portion of the diaphragm 70 is coupled to the
peripheral portion of the frame 50 together with the waste dust 6, A voice coil 8 is attached to
the central portion of 7, and an intermediate portion of the voice coil 8 is held by a damper 10
whose peripheral portion is adhered to a sticking base portion 9 of a frame 5; The magnetic cap
11 of the circuit 4 is fitted without any centering, and a dust cap 12 is attached to the upper
central surface of the first plate 7 in order to prevent dust from coming into the speaker. In the
above configuration, in order to hold the voice coil 8 by the damper 10, it is necessary to fit the
voice coil 8 precisely to the inside diameter + 1111 end of the damper 10 until the filling agent is
applied to the upper river surface of the voice coil bobbin 8. There was a habit. Furthermore, in
order to attach the damper 10 to the frame 5, an adhesive is applied to the dust and the pasting
portion 9 provided on the frame 5 as described above, and the central axis of the voice coil 38
provided on the frame 5 and the damper 10 is accurate. It is necessary to dry the adhesive in a
state where the outer diameter side end of the damper 10 is in contact with the sticking base
portion 9 while adjusting so as to conform to the above. In the production of a conventional
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speaker, the improvement of the biomedical ability is hampered because it requires a process
that requires time and technology in this way. To eliminate the disadvantages of An embodiment
of the present invention will be described below based on the drawings. FIG. 2 is a front crosssectional view of a speaker according to an embodiment of the present invention, and FIGS. 3a
and 3b are a plan view and a front cross-sectional view of a 11llj molded body of a damper and a
frame which characterizes the speaker. A center ball 13 and a magnet 14 pr 'tib under the center
pole 13 are housed inside a yoke 15 to form a magnetic circuit 16, and a frame 17 and a damper
integrally formed on the yoke 15 Fix 18 and connect the peripheral edge of the frame 170 with
the gasket 19 and the diaphragm 20 'at the fixed edge of the frame 170 and the voice coil 21 at
the center of the 0 diaphragm 42o. Hold the middle part of 21 by 1 with damper 12 and
magnetize the lower part of upper d voice coil 21.
It is fitted into the magnetic gap 22 of the +1111 path 16 without collapsing, and a dust cap 23
is attached to the central surface of the biasing plate 20 in order to prevent the entry of dust into
the speaker. The characteristic of this speaker is, as shown in FIGS. 3a and 3b, that Dachha 18
(shown by an oblique part in the 31st 1a) is resin molded integrally with the frame 17 at the
inner diameter +1111 of the frame 17. It is. In order to lower the minimum resonance wave
number of the speaker, this Dan-18 is formed thinner than the frame 17 and has a punched out
portion 18a. Further, a central hole 18 b for fixing the voice coil 21 is bored in the central
portion of the damper 18. In addition, the costing projections 171L and 1L of the bloodstream
portion of the frame 17 are inserted into the vocal tract holes 15a and 16b bored in the yoke 15,
respectively, and they are put together by heat bathing, so that the frame 1R is completed. The
resin molded body of the damper 18 is fixed to the yoke 15. Further, the voice coil 21 is fitted in
the center hole 181) formed in the inside, the shie, and the part of the damper 18, and is fixed by
the contact A agent. In the mobile speaker of the above configuration, since the frame 17 and the
damper 18 are integrally made of metal by a mold, the step of mutually aligning and bonding the
frame 17 and the damper 1g can be reduced in the assembly process. In addition, since the frame
17 and the damper 13 are integrally formed by a constant mold stamped on the top of the roof,
the variation in mutual position is reduced, and the quality of the moving city speaker is
improved and made uniform. Further, since the damper 18 is integrally formed with the frame
1r7 at a rate at which the voice coil 21 is fitted to the center hole 181L of the damper 18, the
adhesive is not dried as in the prior art, There is an effect that the voice coil 21 can be accurately
held at the predetermined position of the magnetic gap 220 without causing the damper 18 to be
displaced at the end of the frame 1. Although the above embodiment has been described using an
electrodynamic speaker having an internal magnetic type magnetic circuit, the present invention
is of course applicable to an electrodynamic speaker having 6 external magnetic type magnetic
circuits. it can. Further, in order to fix the resin molded body of the frame and the damper to the
upper part of the magnetic (R) path, it is possible to use an armature / agent. As described above,
the present invention has a simple structure and excellent juvenile fruits, and has a large
practical value of 111.
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