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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the main part of a
conventional speaker vibration system, and FIGS. 3 and 4 are cross-sectional views of a main part
of a speaker vibration system showing an embodiment of the present invention. FIG. 5 is a curve
diagram of output sound pressure characteristics. 1 ...... voice coil assembly, 6 ...... cone, rising
sheet of 1 ...... cone, 3,8 ...... elastic body.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker for
sound reproduction. . In the speaker, an elastic body may be provided between the voice coil
assembly and the cone for the purpose of obtaining unnecessary high frequency resonance and
the like. このようなスピ。 Prior art on mosquitoes is shown in FIG. 1 and in FIG. す。 In these
figures, it is a 1a voice coil assembly, and 2 and 2 are cones. 3.5 is an elastic body, and the
number is gold wound on the outside of the elastic body 11. It is a horse. The purpose is to put
an elastic body between the top of the coil assembly and the cone, the voice coil mass and the
cone mass. The mass is considered to be the mass in the curtain, and the elastic body is
considered to be a lumped hump ··· ′ ′, and a burn-out lan- ance, and a high-pass cutoff filter is
formed by these to attenuate the sound pressure of the non-Wt high-pass part. However, the
vibration system shown in FIGS. 1 and 2 which is a conventional example is in the form of a cone.
The shape is rectilinear in the cross section or convex upward 11 (opposite the voice coil). In the
case of such or cone shape, it is no longer possible to place it as a cone single concentrated
negative amount, and has successively large resonances from the lowest order resonance of the
cone itself. As a result, even if the elastic body shown in FIGS. 1 and 2 is inserted into the inner
diameter portion of the cone, it becomes a speaker. The sound pressure support does not
necessarily show sufficient high-frequency cutoff. It is an object of the present invention to
provide a loudspeaker having an effective high-pass harmonic characteristic without the
drawbacks of the prior art. In the present invention, the shape of the cone cross section is the
lower side (voiceco. I) It is characterized in that what is K convex is combined with a bowl-shaped
cone and an elastic body. An embodiment of the present invention will be described with
reference to the drawings. る。 In the figure, l is a voice coil assembly, 3 is an elastic body, and 6
is a cone. The cross section of the cone 6 is convex to the lower Im (voice coil), and the cone 6
and the elastic body 3 stand with the cone 6. Fix it by the raised part. The output sound of the
speaker when there is no elastic body and the upper part of the Heuss coil assembly and the
cone inner diameter are rigidly attached. The positive characteristic is a single-peak
characteristic in the high region, and the output sound pressure decreases with an increase in
frequency at frequencies higher than that. However, as shown in FIG. 3, a moderate loss between
the inner diameter of the cone 6 and the voice coil assembly 1. The d1 vibration system can be
placed in an equivalent circuit as a rational three-element high-pass cutoff filter by interposing
an elastic body 3 having. That is, the bowl-shaped cone 6 and the elastic body 3 of FIG. 3 are
used, and the high-frequency cutoff of the speaker is easy.
Output sound pressure at a frequency of seconds or more. It can be made smaller on a pillar.
Another implementation of the present invention to sugar 4 figure? Indicates I. In FIG. 1ift, 1 is a
voice-fill assembly, 6 is a bowl-shaped bowl / corn, and 8 is an elastic body. The elastic body 8 is
surface-bonded to the rising portion of the cone 6 at its central portion. First, the elastic body 8 is
compressed between the inner diameter of the cone 6 and the voice coil assembly 1. In the case
of the kernel-like configuration, the position of the cone 6 and the relative position of the elastic
body can be easily and correctly obtained, which is advantageous in assembly. る。 An example
of the output sound pressure characteristic of the speaker of the present invention is shown in
FIG. In FIG. 5, the vertical axis is sound pressure, and the horizontal axis is frequency. The size of
the speaker is so-called. 1ijQamスピーカである。 Thus, this invention. The speaker can
hold high frequency range; thus, according to the present invention, the output sound pressure
characteristic is excellent. 2) Radial force because it is compressed between core 72 and voice
coil assembly when bonding. As a result, there is no jig during bonding and no paper dropout. 3.
The structure shown in Fig. 1 can reduce the number of parts No. 1 'because there is no metal
body, and can be manufactured at a low cost. Because the elastic body 8 is compressed during
bonding. Excess adhesive between the elastic body 8 and the top of the cone 2 or the wheel
assembly 1 runs out. As a result, the adhesive layer becomes thin and it becomes possible to
determine the high 'L' and the shear property only by the inherent consistency of the elastic body
6. That is, it is possible to reduce one factor of the variation in wrinkles. 5. When combined with
bowl shaped cones, we can replace the straw cones with equivalent circuits of lumped constants.
Because it is easy to cut 1lItK high range, it is expensive. The effect of breaking is great. It has
many advantages such as