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TECHNICAL FIELD The present invention relates to a speaker connected to various audio devices.
2. Description of the Related Art In accordance with the design and miniaturization of various
types of acoustic devices, oval or rectangular speakers have come to be used in recent years. In
this case, the relationship between the diaphragm and the suspension is as shown in FIG. 4 and
FIG. That is, when the outer diameter of the diaphragms 1 and 2 is AxB (A> 8), the outer diameter
c of the suspensions 3 and 4 is regulated to C ≦ B. However, in this configuration, since the
outer diameter of the suspension is small, the degree of flexibility is small, a large amplitude can
not be obtained, and the lowest resonance frequency of the speaker is increased, making it
difficult to reproduce the bass. Therefore, it is an object of the present invention to provide a
speaker capable of sufficiently reproducing bass even with a non-circular diaphragm. Means for
Solving the Problems In order to solve this problem, the present invention uses a suspension in
which the corrugation interval is formed differently depending on the radial direction and in
which a notch is partially provided. By changing the corrugation interval and providing the
notches according to the external shape of the action speaker, the suspension is given a suitable
degree of flexibility and the bass can be sufficiently reproduced. Embodiment A speaker
according to an embodiment of the present invention will be described with reference to the
drawings. 1 and 2 are plan views of the suspension used in the same speaker, and FIG. 1 shows
an oval suspension and FIG. 2 shows a rectangular suspension. As shown in the drawing, the
suspensions 5 and 6 are formed such that the intervals of the corrugations 7 and 8 differ
depending on the radial direction. Moreover, notches 9 and 10 are formed in the radial direction
in the suspension 6.6. By forming the intervals of the corrugations 7 and 8 to be different
depending on the radiation direction in this manner, the largest possible suspensions 5 and 6 can
be used according to the shape of the speaker. Furthermore, by providing the notches 9 and 10
in the radial direction, the portions are deformed to reduce the stiffness of the suspension, so
that the suspensions 5 and 6 are provided with an appropriate degree of flexibility. As a result,
the characteristics shown by X in FIG. 3 are obtained. That is, it can be understood that the
lowest resonance frequency can be lowered, and the ability to reproduce bass is improved as
compared with the characteristic Y of the speaker not provided with the notch. The characteristic
shown in FIG. 3 is the one having a speaker diameter of 129 × 33 N, and the result that the
lowest resonance frequency was 150 Hz when using the suspension without the notch portion
was lowered to 130 Hz.
Effect of the Invention The present invention is configured as described above, so that it is
possible to sufficiently reproduce bass in speakers of various shapes.
Brief description of the drawings
1 and 2 are each a plan view of a suspension town used in a speaker according to an
embodiment of the present invention, FIG. 3 is a characteristic view of the same speaker, and
FIGS. 4 and 5 are each plan views of a conventional speaker. It is.
5.6 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · suspension, 7, 8, · · · · · · · · · · · · · · · · · · ·
· · · · notched. Name of an agent Attorney Nakao Toshio Other 1 person Figure 1 Figure 2 Figure
3 Figure 4 Figure 5
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jps61114699, description
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