JPS62193497

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DESCRIPTION JPS62193497
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of manufacturing a honeycomb diaphragm having an air vent for improving the flow of
air in a dust cap, for example, in a speaker device. 2. Description of the Related Art
Conventionally, as a honeycomb diaphragm of this type, one having a configuration as
schematically shown in FIG. 3 is known. To explain this briefly, it is shown by a symbol 1 in the
figure / \ Nicam vibrating plate, a honeycomb core 2 and its front and back surfaces, a front
surface to be adhered to the back surface, and a pair of skin materials 3.4. As shown in FIG. 6B,
an air vent hole 6 is formed by drilling with a drill blade 5 or the like. And, such a honeycomb
diaphragm 1 is employed as a diaphragm in a speaker device as schematically shown in FIG.
Here, the group 11 in the drawing is a pole piece having a protrusion 11a at its center, and 12 is
an annular magnet laminated and arranged on the pole piece llh at an appropriate interval
around the protrusion 11a. An annular magnetic plate 13 is fixed to the 1-side of the ring by
appropriate means. As a result, the magnetic circuit 10 for the voice coil 14 inserted and
disposed at an appropriate distance in the air gap portion inside the magnetic plate 13 is
configured. Reference numeral 15 denotes a voice coil bobbin formed by winding the voice coil
14. The Pobin 15 is a spider 17 for a front frame 1 /-16 of a speaker fixed to a magnetic plate 13
or the like constituting the magnetic circuit 10. And the voice coil 14 is supported in the IIT
dynamic rif ability through the honeycomb diaphragm 1 so that the portion of the voice coil 14 is
positioned in the space between the protrusion 11a of the pole piece 11 and the magnetic sleeve
L / -413. It is inserted and arranged. In FIG. 1, 18 is an edge for connecting the outer peripheral
edge of the honeycomb diaphragm 1) to the 1 / − side, and 19 is a dust joined and fixed by an
adhesive so as to cover the central portion of the honeycomb diaphragm 1. The air vent hole 6 is
positioned at a position corresponding to the dust cap 19 by a cap. This is because the air flow in
the dust cap 19 is deteriorated without the air vent hole 6, and a force that makes it difficult to
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vibrate the honeycomb diaphragm 1 acts, and distortion of the vibration system is increased. In
particular, many loudspeaker diaphragms for amplitude low-frequency low-pitched areas are
often provided with the hill-shaped holes 9 described above. Then, in the speaker mounting with
such a configuration, the protruding portion 11a of the pole piece 11,! l: The air gap with the
magnetic plate 13 is, as is well known, a magnetic circuit generates a magnetic field by driving a
current according to the left-hand rule of Fleming by supplying a current to the voice coil 14
inserted in the magnetic air gap. A force is generated, whereby the voice coil 14 vibrates, this
vibration is transmitted to the side of the honeycomb diaphragm 1 via the povin 15, and the
honeycomb diaphragm 1 vibrates to emit a sound to the outside. Met.
[Problems to be solved by the invention] By the way, as described above, the conventional
honeycomb diaphragm l having the air vent holes 6 is started as shown in FIG. 3 (a), (b) and (c).
The front and back skin materials 3.4 are adhered to the front and back surfaces of the
honeycomb core 2 with an adhesive applied, and then they are positioned in the predetermined
places, for example, the dust cap when incorporated into a speaker device. It was formed by
drilling the air vent hole 6 by post processing with the drill blade 5 at several places. However, in
such a conventional manufacturing method, if the cutting of the drill bit 5 becomes worse at the
time of drilling the air vent hole 6, the honeycomb core 2 or the face near the air vent hole 6, the
surface of the eyebrow skin 3, The chip 4 may be chipped or chips of the core 2 and the skin
material 3 ° 4 may remain in the air vent 6, and troublesome work for removing the same may
be required. When it enters into the cells of the honeycomb core 2, it is virtually impossible to
completely remove it. Therefore, when the honeycomb diaphragm 1 is incorporated into a
speaker device to generate a sound, a chattering phenomenon is generated. It had a problem
such as causing it to occur. The present invention has been made in view of a series of spring
conditions, and eliminates the problems such as the conventional honeycomb core, the front and
back skin materials, and the problem of the remaining residue due to the air holes of the cutting
material and removing the problems. It is an object of the present invention to provide an
inexpensive method for manufacturing a honeycomb diaphragm in a cylinder which is free from
the occurrence of chattering and the like in a speaker device according to the present invention.
[Step F for Solving the Problems] A method of manufacturing a honeycomb diaphragm according
to the present invention comprises: a second cam core and the front and back surfaces thereof;
Honeycomb diaphragm in which air vents are drilled at predetermined locations. An air vent hole
is previously formed in the front and back skin materials, and then, the front and back skin
materials are attached to the front and back surfaces of the honeycomb core. [Operation]
According to the present invention, since the air vent hole is formed as a front work on the front
and back skin materials, and this is laminated and adhered to the honeycomb core, the core in
the vicinity of the air vent hole as in the prior art And there is no problem such as chipping of the
skin material, which leaves the scum in the air vent and requires removal operation, and as a
result, when it is silked in the speaker device, This air vent does not cause chattering. DETAILED
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in
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detail using the embodiments shown in the drawings.
1 (a) and 1 (b) show an embodiment of a method of manufacturing Hough '', 6 ', and a vibration
handle according to the present invention, and in these figures, the same or corresponding parts
as in FIG. Are given the same numbers and their explanations are omitted. Now, according to the
present invention, the honeycomb core 2 and the front and back skin materials 3.4 laminated
and attached to the front and back thereof are formed by the air holes 3.4. In the abovedescribed front and back skin materials 3 and 4, air holes 6a and 6b are formed in advance as
pre-processing, and then the front and back skin materials 3 and 4 are honeycombed. It is
characterized in that it is formed by sticking to the front and back surfaces of the core 2 through
an adhesive. And, according to the present invention, the air vents 6a are pre-processed to the
front skin materials 3 and 4 according to the present invention. 6b are respectively drilled, and
these are laminated and adhered to the honeycomb core 2 as post-processing, so that the hole
drilling operation is performed after the honeycomb diaphragm 1 is formed in the laminated
state as in the prior art That is, no chipping of the core 2 and the skin materials 3 and 4 in the
vicinity of the air vent hole 6 occurs, thereby eliminating the problem that the residue remains in
the air vent hole 6 and the removing operation is required. As a result, when this is incorporated
into a speaker device, the air bubble hole 6 does not cause a chattering phenomenon, and the
honeycomb diaphragm 1 having the air hole 6 (6a, 6b) is stably manufactured. It is possible.
Here, the air vents 6a and 6b according to the present invention are drilled only in the front and
back skin materials 3.4, and no particular drilling operation is performed on the honeycomb core
2, but this honeycomb core is not It will be readily understood that in 2 a large number of cells
are pierced and through which air can flow and air can be obtained as an air vent. Further, such a
honeycomb diaphragm 1 is incorporated in the speaker device in the state as shown in FIG. 2,
but this is the same as FIG. 4 described above, and the detailed description thereof will be
omitted. The present invention is not limited to the structure of the embodiment described above,
and it is free to appropriately modify or change the shape, structure, etc. of each part, including
the shape of the honeycomb diaphragm 1, etc. 5 as needed. . [Effects of the Invention] As
described above, according to the method for manufacturing a honeycomb diaphragm according
to the present invention, the honeycomb core and the front and back surfaces thereof are formed
of the front and back skin materials laminated and attached A honeycomb diaphragm in which an
air vent hole is drilled in the predetermined place is previously drilled in the front and back skin
materials as an air vent hole as a pre-process, and then these front and back skin materials are
Since it is formed by pasting on the back side, chipping of the core and skin material in the
vicinity of the conventional air vent hole does not occur despite the method in the cylinder and
cheap, so that the scraps are air There are no problems such as remaining in the drilled holes and
the need for removing them, and as a result, when this is incorporated into, for example, a
speaker device, such air vents also cause a chattering phenomenon. Not stable And there are
various excellent effects such as the Hanikano-vibration plate may easily formed.
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[0002]
Brief description of the drawings
[0003]
1 (a) and 1 (b) are manufacturing process diagrams showing an embodiment of a method of
manufacturing a bar-cam diaphragm according to the present invention, and FIG. 2 is a
schematic cross-sectional view of a speaker apparatus incorporating the honeycomb diaphragm.
FIGS. 3 (a), (b) and (c) are manufacturing process diagrams showing a conventional example, and
FIG. 4 is a schematic cross-sectional view of a speaker apparatus incorporating a conventional
honeycomb diaphragm.
l · · · Honeycomb diaphragm, 2 · · · Honeycomb core, 3, 4 * * @ e surface, back skin material, 6a.
6b (6). Agent Masaru Oiwa Figure 1 Figure 2 Figure 3 Figure 4 Day
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