JPS5172028

Patent Translate
Powered by EPO and Google
Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS5172028
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing one embodiment of a
voice coil bobbin of the present invention, FIG. 2 is a front view showing another embodiment of
the present invention, and FIG. 3 is an effect of the present invention. It is a characteristic view
for explaining. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · air resistance material. Figure {{Figure 65} F1 51-72028 (2) {2 port likelihood 3 port θ
θ Lesbo 6 system (j8-1 o ,, r "-)-af (number of solid waves)-66-
[Detailed description of the invention] This invention is, for example, the Heus coil pobi of the
Scheika. Related to the In the conventional speaker, the voice coil bobbin K11j has been provided
to improve the frequency characteristics etc. However, the Q of the cavity resonance generated
by the opening of the voice coil bobbin and the volume inside the voice coil bobbin is large and
the improvement of the sound pressure reproduction frequency characteristic is insufficient.
There was a drawback of that. The object of the present invention is to improve the point where
the Q of the cavity resonance is large, which is a drawback of the above prior art, to lower the Q,
1 node □ of the cavity resonance, and to improve the sound pressure reproduction frequency
band. To open the voice coil bobbin opening. Cover with air resistance material and resist the air
flowing into and out of the opening. Give anti-port and voice coil to hovin internal volume.
Therefore, it is characterized in that q of nine sinus resonances is lowered and the sound
pressure reproduction frequency band of three numbers is increased. . A practical example of the
present invention will be described below with reference to the drawings. . FIG. 1 is a front view
showing a fruitful example τ of the present invention, and the individual openings 5 provided
on the outer periphery of the voice coil bobbin 1 which has been expanded according to the
present invention 2 or 111 are closed. Is a book in which the air resistance material 4 is adhered.
No. Fig. 2 is a front view showing another embodiment of the present invention. A band-like air
resistance material 5 is adhered so as to close the opening 3 of the Heus coil bobbin 1 around
which the voice coil 2 is wound. Particularly in the embodiment of FIG. 2, although the effective
01-05-2019
1
penetration of the vibration system is increased as compared with the embodiment of FIG. Hois
coil lead wire (figure shown!), Which was conventionally fixed with a presser paper etc. One mind
", 2. 1) fixing by air resistance material 5 There are effects such as being able to And air
resistance material. Sound absorbing material and cloth can be used. . FIG. 5 is a characteristic
diagram for explaining the effect of the present invention, in which α shows the frequency
characteristic by the conventional voice coil bobbin 5 and b shows the frequency characteristic
by the voice coil bobbin of the present invention. is there. This is because the Q of the cavity
resonance is large. The disturbance of the frequency characteristic of α that occurs in not b. な
っていることがわかる。 4.。 In the above description, it has been described that the entire Fi
opening 5 is closed, but depending on the degree of improvement of the sound pressure
reproduction frequency characteristic, it is sufficient to change the material of the air resistance
material which changes the part closing the opening 5 or It does not go beyond the essence of
these company ideas. As described above, according to the present invention, the Q of the cavity
resonance generated by the opening of the voice coil bobbin and the internal volume of the voice
coil bobbin is reduced, and the sound pressure reproduction frequency characteristic can be
improved.
To 1 "1 E 1 · 3 · ■
01-05-2019
2