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FIELD OF THE INVENTION This invention relates to speakers. 2. Description of the Related Art At
present, for multi-way medium to high-pitched sound (skoker tweeter) for stereo and the like, a
closed frame is often used due to the relationship between the frequency of reception and
mechanical resistance. When changing the low range of each spino j (sukoka tweeter) using this
closed type frame, the frame shape (such as depth) is changed to change the rear surface volume
or a sound absorbing rod is inserted in the rear surface volume. Hereinafter, a conventional
closed frame S speaker will be described with reference to the drawings (FIG. 4). In the figure, (1)
is a closed frame, which holds the vibration system and the field section. 2 is a magnet
sandwiched between the top plate 3 and the bottom plate 4, 5 is a suspension, 6 is a voice coil, 7
is a cone (diaphragm), 8 is a dust cap, 9 is a frame 1 at the periphery of the frame 1 A gasket 10
sandwiching the peripheral portion of the cone 7 between them is a sound absorbing material 10
provided in the diaphragm rear surface space 11 between the frame 1 and the cone 7. (1) In the
speaker of such a conventional configuration, the volume of the frame 1 determines the volume
of the rear surface of the diaphragm and enables some changes in low frequency characteristics
such as @ Ц f10. The low frequency characteristics of such a loudspeaker are determined by the
volume VJ'C of the enclosed frame, and fo (H2) (minimum resonance frequency) is largely
dependent on the frame volume. In order to largely change the low-pass characteristics, it has
been necessary to change the basic shape of the frame. Problems to be solved by the invention
However, when changing the shape of the frame to change the back surface volume of the
conventional speaker, a large number of complicated closed frame molds are required, which is
uneconomical in practice. Although the sound absorbing material was put in the volume, etc.,
there was no effect as much as the volume was changed, and the structure had the disadvantage
that the sound absorbing material contacted the diaphragm and generated abnormal noise.
Mokumitsu solves these problems, and it has a structure in which a closed volume part is formed
by a sealing part in the volume part of the rear face of the diaphragm, and the volume of the rear
face of the diaphragm is optionally changed by replacing this part. The purpose is to provide a
changeable speaker. Means for Solving the Problem In order to solve this problem, the present
Komei is a diaphragm that releasably joins a sealing part having rigidity that can withstand
changes in pressure during operation of the speaker in a frame. It forms the back surface volume.
By the configuration of each element, a dense rA space (rear surface volume) can be formed
between the diaphragm and the sealing part, and the low frequency characteristic of the speaker
can be arbitrarily changed by replacing the sealing part, and a low mid band unit When[!
It is possible to connect I Ц characteristics to computers. EXAMPLES Hereinafter, one example of
the present invention will be described based on the drawings (FIGS. 1 to 3). In the figure, 1 'is an
open frame, 12 is attached to the frame 1' in the space between the frame 1 'and the cone
(diaphragm) 7 to seal the gQ (a sealed part 11' with the cone 7). It is a space for sealing of the
rear surface of the diaphragm between the components 12. Other configurations CJ and + iir are
the same as in the conventional example, and for the same parts (the same (= I S'3 is shown, and
the detailed description thereof is omitted. According to the speaker configured as described
above, according to the speaker configured as described above, J: in the rear face volume formed
by the replacement I-rf capable sealing part 12 joined to the frame 1 ', the speaker's low-pass
characteristic can optionally be It can change. The third dashed dotted line shows another sealing
part 12 which has been replaced. The sealing part 12 is a resin or metal having a rigidity that can
withstand changes in L1 force (internal pressure) of the speaker operation 11; 1 and has a
square shape, an oval shape, etc. besides a planar shape circular according to the shape of the
spy jJ. It is formed. As described above, according to the present invention, it is possible to
change the low-pass characteristics of the speed h by changing the rear surface volume of the
diaphragm by replacing the sealing parts, and in the Margeway type system It is possible to
connect the characteristics (or sound quality) smoothly with the range characteristics, and the
practical effects are great.
Brief description of the drawings
1 to 3 show an embodiment of the present invention. FIG. 1 is a cross-sectional view of a speaker,
FIG. 2 is a plan view of a sealing component, and FIG. 3 is a cross-sectional view of a sealing
component. FIG. 4 is a cross-sectional view of a conventional speaker.
1 ? иии Open frame, 7 иии Cone, 11 ? иии Diaphragm back surface space, 12 иии Part agent for sealing
Yoshiru Morimoto Hiroshi Figure 1 -7---cone 11 ',--after vibration extraction m12'-one lightning
closure m wholesale goods Fig. 2 Fig. 3 Fig. 4
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description, jps62150998
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