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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic explanatory view showing a
conventional drawing procedure, FIG. 2 is an f characteristic diagram of the conventional
example, and FIGS. 3 and 4 are an embodiment of the present invention. 3A to 3C are schematic
explanatory views of the drawing procedure, and FIG. 4 is an f characteristic view. 2 · · · · · · · · · · · ·
· · · · · · · 1st drum , 6 · · · 2nd drum, 6b · · · · · · · 6d · · · 1st wire mesh, 6e · · · · · 2nd wire mesh, 7 · · ·
· · · Hole, 8 ········· Fabric, 9 ··········· Speaker diaphragm.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the manufacture
and attachment of a sheet for a speaker diaphragm 1, jL, where the purpose is the speaker JII
444 =: Jl sheet of fiber at the central portion and the peripheral portion t (-t The difference is that
-tc density f / Wl) is made different, thereby extending the high region of the f characteristic of
the -C loudspeaker diaphragm. 'I! Of the conventionally known speaker @ moving plate The iAU
稈 will be described based on the iW1 diagrams (i) to (e). In the figure (i), fil contains an edge
material (2) t4. + 31 is a @ 2 tank containing corn material (4), (5) 1'111 in the first tank (1), and
sunk ") IIJ (one / theta-1 z) A first drum (see FIG. 1), flit I, a drum main body (6a) made of a wire
mesh disposed in the second tank (3), and a comb wound around the main body (6a) An n2 drum
(f in FIG. F) comprising a mask (61) and one self-depressed 1 + gold m (6c) in each of the first
through holes each having an i-th dimension at appropriate intervals on the mask (613). (Refer to
→) (8) is a cloth cast on top 15 of the various (1), (3). In the heel structure, as shown in FIG. 6A,
the cloth (8) is moved in the direction of the arrow (2) to 11 and [Iii is Is + 1111 is turned in the
direction of the arrow (n) (C). Then, let's work out the edge human resource (2) with the first
drum (5), transfer the edge part (2a) to the cloth (8), and then the second drum! , 16) to make a
cone upper material (4) and then to form an edge portion (transfer the circular cone portion (4a)
to 2aN- to the same figure) + [), and then h-? A speaker diaphragm (9) is formed as shown in FIG.
61-, in which the sheet for speaker diaphragm is pressed from the self-cone portion (4a) and the
edge portion (2a). By the way, in order to extend the high-frequency region of f time, it is
possible to make the basis weight of the fiber of the center% of the cone part (4a) and the outer
W part different, but to do so, the above (2) 10 (10) JLS] Rumor in the conventional method, the
eighth tank is provided, and the eighth layer is to be transferred onto the cone portion (4a), but
in this method, the core of the cone portion (4a) and the eighth layer However, as shown at $
216, one of the f characteristics is very large. The present invention provides a sheet
manufacturing apparatus for a speaker diaphragm, which solves such problems. Hereinafter, an
embodiment of the present invention will be described based on FIGS. 2 (a) to (e). That is, each
manufacturer of masks (6b) (for example, 100 mesh of the first wire mesh (6d) is put in the
inside of 7+), and then the outer peripheral portion under the first wire mesh (6d) is, for example,
200 mesh of second gold @ (6e) The
The configuration other than the above is the same as the conventional example shown in FIG.
The method of papermaking with the above configuration is the same as in the prior art, but
when the corn material (4) is milled by the second drum (6) and the cone part (4a) is transferred
onto the edge part (2a) The corn material <4) which has entered the inside will not flow much
because the outer peripheral portion is 300 mesh, and will flow out relatively well since the
central portion is 100 mesh. Therefore, the basis weight of pigeons in the central part (3) 004]
(4a +) of the 7% cone (4a) becomes smaller than that of its outer peripheral part (4az), and the
cone part (4) on the edge part (2a) To: ': 211.7. It is the same as being stacked with the Ha layer,
and there is no difference in the core between if 2114 and Pl) 8 and @. Therefore, as shown in
FIG. 4, it is possible to provide a speaker diaphragm (9) having no variation in the f characteristic
(the (e) state). In the above example,-in each company (7). The second wire mesh (6d) (6e) 5casted, but the eighth. If the fourth and the wire mesh are opened, the edge part (2a) -J: the corn
part (4a) is the third size, :)) can be stacked with four layers. 1st officer Using a drum (5) + 6) of
rN2, the so-called round netting method was used, but it goes without saying that 1 commercial
drawing is also possible when using flat plate type wire netting, so-called flat netting method
Above v, according to the sheet production V of the speaker vibration II III plate of the present
invention according to the present invention, the mesh of the center 1 'claw of the wire mesh of
the hole of the mask and the outer Ji 6 is different 1 1 1 Therefore, it is possible to make the
basis weight of the central portion of the cone portion and that of the outer peripheral portion
different (4) 008--· · · 2, 4 without adding one bath of the cone Δ 牟 4. It is. Therefore, it is the
same as a plurality of cones on an edge, and it is the same as the ones with stagnation, and there
is no core deviation of the respective layers. Therefore, it is possible to provide a speaker
diaphragm free of variations in f characteristics.