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DESCRIPTION JPS568387

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DESCRIPTION JPS568387
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a portion of a flat
diaphragm type speaker unit according to the present invention, FIG. It is. Reference Signs List 1 ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · voice coil bobbin, 31 · · · ·
voice coil bobbin material, 32 · · · · · · 4 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · Damper, 7a · · · · · · · · · · · ·
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat diaphragm
type speaker unit, and more particularly to a suspension of a good speaker unit using a square
flat diaphragm. The flat diaphragm can obtain relatively flat high-voltage characteristics over the
entire frequency range, and can recognize features such as being able to enjoy the reproduced
sound by a stable sound image, and a speaker system using this can be provided. ,? -? , 3 ° / has
come. In the case of this flat diaphragm, a rectangular diaphragm is often adopted, but it is
known that this rectangular diaphragm is driven by a plurality of circular driver units. In this
type, it is difficult to make the entire flat diaphragm move in a uniform piston motion, so it is
desirable to drive with a driver unit corresponding to the shape of the diaphragm. Therefore, in
the present invention, the straight portions along each side of the rectangular diaphragm are
appropriately continued to form a friendly voice coil bobbin, the voice coil bobbin is adhered and
fixed to the voice coil bobbin, and furthermore, the linear damper It is characterized in that the
coil bobbin is suspended. The details of this invention will be described below with reference to
the attached drawings. First, 1s is a partially enlarged sectional view of a speaker unit using a flat
diaphragm, and the diaphragm l of a square bass portion is supported by the frame via an edge /
a frame around the periphery, A voice coil bobbin material 31 having a U-shaped cross section is
fixed on each side in parallel with the sides of the diaphragm I, and the voice coil 2-bottle J't 41!
Three voice coils formed in a square are fixed as if connecting -IIJl3 / a of each voice coil bobbin
material 31. The die coil 3 is located in the air gap between the pair of magnets 4L / fixed to the
plate gauze, and the driver unit is constituted by the yoke S located between the pair of plate
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gauze. Of the pair of plates, the damper base 6 is fixed along the length direction to the outer
plate, and one end of the damper is fixed to the damper white base, and the other end of the
damper 7 is a voice coil bobbin It is fixed to the material 31. This dum bag is formed by applying
a suitable treatment to a silk cloth woven with warp yarns and weft yarns, and has a plurality of
rolls taf in the width direction of the dum bag, no stretchability in the length direction, and the
width direction The stretchability corresponding to the deformation of 7 m of roll is given only
to. Therefore, the voice coil bobbin 3 is transmitted with a driving force as shown by arrow A in
FIG. 2, so that the voice coil bobbin material 3 / is slightly different when the damper is
deformable in multiple directions. It is difficult to make a movement and make a diaphragm / luniform piston movement across the entire surface, but the deformation of the damper 7 in the
longitudinal direction is suppressed and the roll?
Since only the deformation by the prince is misrepresented, only the vertical movement is
transmitted to the diaphragm and only the piston movement of the diaphragm I is performed. As
apparent from the above description, according to the half diaphragm type speaker unit of the
present invention, a voice coil bobbin material forming a driver unit by a square voice coil bobbin
suitable for a square diaphragm and forming a voice coil bobbin The damper is provided along
this line, and this damper has a roll that can be deformed only in the width direction of the
damper, and this damper is disposed along the lengthwise direction of the bobbin, so the driving
force generated in the voice coil is faithful Can be transmitted only in the direction perpendicular
to the diaphragm, and the entire surface of the diaphragm can be vibrated uniformly.
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