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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention,
FIG. 1 is a perspective view, FIG. 2 is a reticulated surface, and FIG. 3 is a bottom view of a main
body. 1 is a box body, 1a is a baffle board, 1d is an opening, and 3 is a back plate. Fig. 1-69Actual opening so-6 x oz 2 (! 2) FIG. 1 b10 / IC //// 1e / 34 / ′) A) r1f′l (/ 1:!: L11 :! (・ / \
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DETAILED DESCRIPTION OF THE INVENTION This invention relates to the improvement of a
speaker box having a back plate at the bottom of the body which is "y" jfkl made of a material of
specific gravity than wood. In order to enhance the acoustic effect, the speaker box is configured
in a box shape by a thick plate or the like, and in particular, interposing strong and weak
materials in the four plates that become the peak of the speaker. There are concerns that do not
vibrate or resonate during use. For this reason, it requires a lot of labor and materials to make
and is expensive to one person, and there is also a drawback that the shape of wood is limited to
a box-like shape and it is impossible to form a design which is immersed in design. (1) \ 7) This
invention was made for the purpose of eliminating such a drawback, and the box body is formed
of concrete or a gold piece having a larger specific gravity than wood, for example, and the back
plate to be used after the speaker is A speaker box is provided at the bottom, and the back plate
is pressed against the desk surface etc. by self-restraint of the main body to prevent resonance
and imaging movement, so that the structure of the plate can be simplified and provided
inexpensively. At the same time, a speaker box with a relatively free shape is obtained.
Hereinafter, the present invention will be described in detail with reference to an embodiment
shown in the drawings. In the figure, 1 box is a one-volume box body made of bulging resin
concrete, and the transverse ml has a substantially oval shape in a short box-like shape, the
upper surface to be the buckle board 1a is inclined in one direction There is. In the buckle board
1a, the speaker mounting of the large and small two holes 11), l (!) These mountings are such
that speakers (not shown) are mounted in the holes 1b and 10 from the bottom opening 1d side
of the main body l. Further, the inner peripheral surface of the main body 1 is provided with
several sleeves in a direction parallel to the lll # iT, and is provided with a plurality of sleeves (→
→ to the bottom of the main body 1 of the reinforcing lip 1e). A screw hole 2 is opened at the
bottom end. A nose plate 3 of a size sufficient to cover the entire surface is detachably attached
to the hole opening 1d of the upper 41 main body 1, and fixed to the bottom surface of the main
body 1 by a solid blue serial number pushed through the screw hole 2 ing. The back plate is
made of thin plywood or the like, and an elastic body 5 such as a rubber plate is attached to the
outer side surface so as to absorb the vibration and not damage the surface such as a desk to be
placed. In the above embodiment, the main body 1 is formed of resin concrete, but it may be
ordinary concrete or metal. Furthermore, a sealing material may be interposed between the back
plate 3 casted between the bottom of the main body 1 and the main body 1 to make it airtight: C.
In this device, the box body 1 is mB made of concrete, metal or the like having a large ratio
bundle than that of wood as described in detail above, and is provided on the rear side of the
speaker! j! Since the plate 3 is attached to the bottom of the main body 1, the shape of the
main body 1 can be designed figuratively freely. Since the back plate 3 is relegated to the desk
top etc. by the weight of the main body 1, even if the structure of the back plate 3 itself is
simplified, there is no risk that the co-electricity 7 or pregnancy 1 will occur during use. You can
The sound effects are improved by this, and the simplification of Xing & 3 makes the production
work easy, and the speaker box provides the practical effects at an inexpensive cost.