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Secretary General of the Patent Office Hideo Saito, November 21, 1974, inventor 3, patent
applicant address (resident), Ota-ku, Tokyo Omori-ku 4-chome 15-5 (soi) Name (name) Pioneer
Corporation Representative, Ryozo Ishizuka Name (6069) Patent attorney Hide Manno [Phase]
Japan Patent Office 18 published patent gazette ? JP 50-750 270 published Japan 50. (1975)
6.2g Japanese Patent Application No. 4g-/ 22 / '14 Office serial number '4' 56-6-specification 1,
title of the invention
Manufacturing method of speaker suspension moving plate
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement
of a method of manufacturing a speaker diaphragm. As shown in Fig. 1 (i) or ri (ii), the diaphragm
for the speaker is attached with a diaphragm die (2) formed of a wire mesh (or punching net) in
the link (1). Liquid (a ') t-injection into which a certain amount of refined pulp or artificial fibers
are swimming, and then link (fl) below (4) using a vacuum pump etc. Liquid (3 was made to be
strongly sucked, and the liquid (3 fibers in 3 was adsorbed in the hole of diaphragm W (2) and its
periphery). However, in the method (right paper making) shown in FIG. 1 (a) [in the upper part of
the diaphragm of the diaphragm to be mounted, the fiber is not placed on the edge and thinner It
is necessary to use a stiffening material to prevent air permeability, and it is necessary to use
EndPage: 1 or 6 (Fig. 1). B) In the method shown in (b), on the contrary to the case of (a), the
fibers are difficult to be placed on the center of the diaphragm and 9 are easy to be placed on the
edge; In the case of 0 or more (A) or (B), which has the disadvantage that the strength is
weakened and the high frequency characteristics are degraded and the edge portion is thickened
and the lowest resonance frequency is easily increased by 9). As the corners get smaller, the
above-mentioned tendency becomes even larger, and only at the center or at the edge. , 'The
effect appears even in the IPr surface, and abnormal resonance tubes easily occur in the divided
vibration region. 0 The present invention has been made paying attention to these points, and
the intended place is the thickness according to the shape It is an object of the present invention
to provide a method of manufacturing a speaker diaphragm in which the thickness can be freely
adjusted by preventing the variation of First, one embodiment of the present invention will be
described with reference to FIG. 2. In 0 (i) or 1), a vacuum is applied from the lower side (4) of
the link (1), the diaphragm mold (2) and the link (1). The point of suction by the pump is the
same as that in FIG. (3) is a solution in which the fibers after beating the valve etc. in the same
manner as in FIG. 1 are idled, but around the fibers or in the western part of the fibers, magnetic
substances such as iron oxide and fine powder such as ballineum are artificially 0 (5), which is
resistant to loading, indicates a magnet such as a magnetized apertured ball-nim or a ferrite
magnet, which is mechanically attached to the lower surface of the diaphragm die 21. In such a
configuration, if the lower part (4) of the link (1) -suction is performed by a vacuum pump, a
magnetic field is formed by the magnet (5), the fiber to which the magnetic substance is applied
is a vacuum pump Together with suction by the magnet (5), as a result of which the partial
thickness of the diaphragm to be produced in K can be adjusted arbitrarily.
As described above, according to the present invention, a magnet is provided in the lower portion
of the diaphragm mold, and a liquid to which a magnetic material is applied is injected into the
upper portion of the diaphragm mold. Evacuum Bonn, j j p p ? ? mv? Since the suction was
made, by selecting the strength of the magnetic field by the magnet and the location of the
magnet excessively, the fiber is placed on the diaphragm mold c, the thickness of the diaphragm
formed by f # is a paper sheet l,? ?? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?This is useful because it is compensated in the
thickness adjustment 11.
4 is a schematic cross-sectional view of a conventional diaphragm manufacturing method, and
FIG. 42 is a schematic cross-sectional view of one embodiment of the diaphragm manufacturing
method according to the present invention. (1) ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
Liquid for which fibers to which a magnetic material is applied is swimming и и и и и Magnet, patent
applicants Pioneer Co., Ltd. Nioji Shioshino Sho Hide-? EndPage: 2 Japanese Laid-open Patent
Application v 50-750 27 (3) Procedure Amendment (Spontaneous) October 10, 1972 Patent
Office Secretary Hideo Saito 1 , Display of the case Patent application No. 122,174 No. 4 of the
case, Persons who make corrections Relationship with the applicant's address Tokyo 'Meguro-ku
@ I & 1st chome 4 No. 1 Name (lie1) Pioneer Corporation 5, Agent 6, Date of correction
instruction contents of Showa Date correction (Japanese Patent Application No. 48-122174)
"Utility applicant registered applicant" in the lower right in the drawing is "patent \ applicant" k
correction number. Applicant Paioni Ding Co., Ltd. +) 9. -Notification of change of address
February 16, 1949 Patent Secretary General Hideo Saito 1, display of the case Showa 4 E '11-
Application 1a122 + r74 2, title of the invention 2, name of the invention-name of the invention
f-1 Each Quito * "J Starter-Person 5 Shimi Mi и 3, who changed the address EndPage: ?
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