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JPS56165496

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DESCRIPTION JPS56165496
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the diaphragm of the flat
diaphragm type loudspeaker according to the present invention as viewed from the back, FIG. 2
is an enlarged sectional view taken along the line of FIG. And FIG. 4 is a cross-sectional view
showing each other embodiment. DESCRIPTION OF SYMBOLS 1 иииии Flat diaphragm, 2 иииииии Voice
coil bobbin, 21 иииииии Honeycomb core, 22 иииии Skin material 2a иииииии Bonding edge , 2b иии и и и rim
material, 3 и и и и и и и и voice coil.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat diaphragm
loudspeaker and, more particularly, to a flat diaphragm loudspeaker with an improved voice coil
bobbin. Also known as a speaker cage or flat drive diaphragm speaker using a flat diaphragm,
since each part is driven uniformly, no division vibration occurs and flat frequency
characteristics can be obtained. have. Furthermore, it is possible to obtain a flat sound pressure
frequency without any chamber effect, and to make the piston's vibration area of the diaphragm
wide and low in distortion. The characteristic is that the sound source positions are aligned
because the diaphragm surface of each unit is 6 on the same surface in the baffle plate. However,
if the paper cone conventionally used is made flat, the strong acid is generated and split vibration
is generated, and only a speaker with a very narrow reproduction band can be obtained.
Therefore, by using a diaphragm using a honeycomb core, the mechanical strength of the flat
plate can be satisfied, and a lightweight speaker with good response can be obtained. However,
even if the diaphragm itself has a sufficient strength, there is a problem that the strength of the
voice coil bobbin fixed to the diaphragm is not sufficient. Currently, most voice coil bobbins used
for speakers are cylindrical and have a J diameter of about 100 mm, and these are simply made
large and attached to a flat diaphragm so that the peak, Since the area of the planar diaphragm is
large, sufficient strength of the voice coil bobbin can not be obtained. In particular, when using a
square voice coil such as a square, the strength of the bobbin itself must be high. The strength is,
in particular, that the strength is required for a curve, so the wall thickness may be increased.
11-05-2019
1
The strength of the song increases, but the arm gate also increases with the increase in thickness
VtC, and it is not preferable to increase the strength simply by increasing the thickness. The idea
is to convert the material of the voice coil hovin @@, and the voice coil bobbin ft. Has a large
strength. Therefore, a plane diaphragm is placed between the sides of the honeycomb core. And
the voice coil is attached to the end edge of the voice coil bobbin. Hereinafter, an embodiment of
the present invention will be described along the inner surface of the pleated surface. First, in
FIG. 1, reference numeral / in the figure is a square planar diaphragm formed using a honeycomb
core, and a square voice coil Hovinko or a solid-rolled fleece 9 in this ten-sided low-moving Ikl is
a weir coil bobbin Three voice coils are fixed at the end of the box.
3- And voice coil bobbin co is the same as the diaphragm, the skin material such as aluminum,
beryllium titanium, skin material such as carbon, 21 pasting 9 and honeycomb core U thickness
direction on both sides of aluminum core The frame is configured to be parallel to the flat
diaphragm / parallel to each side of the flat L 111 Itii moving plate /, and the rim material co b is
fixed to the bonding edge co a with the flat diaphragm l And fixed to the plane diaphragm 1 with
an adhesive via the rim material 2b. The voice coil 3 is attached to the free g4 edge of the voice
coil bobbin by a coating agent. As described above, the flat diaphragm type speaker according to
the present invention is formed by using a voice coil bobbin-using a honeycomb corer, so that it
has a light weight ?, a large rigidity against bending, and an abnormal shooting motion 9 The
sound pressure characteristic is not disturbed, and furthermore, the voice coil bobbin does not
co-image at a specific frequency and does not contact the flat in the magnetic gap. In addition, it
is possible to carry out this invention also according to other four embodiments shown in FIG. 3
and FIG. That is, in the embodiment shown in FIG. 3, in the space formed between the extended
portions 22a of the skin material, the skin material bonded to both surfaces of the honeycomb
core U is extended beyond the simple dimension of the honeycomb core 21. Hold the voice coil 3
in place. As a result, the voice coil bobbin ? and the voice coil 3 are easily joined 69, and both
are integrated to increase the strength. 4 is a modification of the embodiment shown in FIG. 3.
The embodiment of FIG. 4 is a modification of the embodiment shown in FIG. The voice coil 3 is
fixed at 22a with an adhesive. As a result, the combination of the voice coil bobbin and the voice
coil 3 becomes easy and strong, and moreover, the winding line width of the Heuss coil is not
limited. Of course, in the above description and drawings, the cross-sectional shape of the voice
coil 3 may be circular, or a square or flat voice coil t + can be obtained. As apparent from the
above description, the flat diaphragm type speaker of this invention is configured by using a
voice coil bobbin and a two-cam core, so that the fault property of the voice coil bobbin does not
significantly change, so It is possible to operate stably without deformation in the gear tube, to
narrow the magnetic gear tube, and to drive efficiently.
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