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JPS55149597

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DESCRIPTION JPS55149597
Lubricator, speaker 1 damping agent for loudspeaker + 11 oligoester acrylate, epoxy acrylate,
urethane acrylate, at least a resin of at least, a damping agent for loudspeaker obtained by mixing
a photo initiator together with a reaction diluent.
2 Claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a damping agent
for a speaker, and more particularly to a damping agent applied to an edge supporting a
diaphragm. The edge for supporting the diaphragm of the speaker should not impede the piston
movement of the & moving plate, nor should the vibration of the diaphragm cause the reverse
resonance phenomenon. Therefore, a damping agent (generally, a dumping agent) is applied to
the surface of the edge in order to work properly to move the edge. The most known as this
damping agent are viscoloid, acrylic resin, urethane resin, nitrile rubber and the like. All of these
damping agents are of the solvent type that is dissolved in a solvent and applied, and since it uses
an organic solvent to apply it, the problem of toxicity, curing takes 24 hours or more, and
application on the line is not possible. It is possible, and it is necessary to wait for the passage of
time after dispensing from the application line, and there is a drawback that the workability is
poor, which hinders the streamlining of work and labor saving. Therefore, this invention mixes
the reaction diluent, the modifier and the plasticizer with the resin of acrylic oligomer such as
diene type, melamine type, vinyl polymer etc. in the damping agent applied to the engine, and
causes the reaction to light. Add photoinitiators to make them react, and apply and cure on the
speaker unit assembly line. -The development of a damping agent that can be terminated. In this
way, because it is not necessary to wait for the solvent to evaporate, once it has been wholesaled
from the speaker unit on the work and has elapsed time? There is no need to wait, continuous
work can be done on the line until the end, and no solvent is used, so there is no adverse effect
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on the human body due to the bath gas and other places (Hygiene work environment) It is
convenient for keeping. Since the damping agent of the present invention is photocurable and is
applied immediately to the edge EndPage: 1, it is immediately cured by the light source lamp, so
that the organic solvent is evaporated along with the improvement of the workability. Next, the
process of obtaining a photocurable damping agent will be described. A resin group a oligo ester
acrylate (polyester type, polyether type) b epoxy acrylate C urethane acrylate (polyester type,
polyether type) d other diene type, acrylic type of melamine type vinyl polymer type, etc. reactive
diluent oligo ester acrylate Acryl monomer, vinyl hepta-1 C modifier acryl polymer, liquid rubber,
plasticizer D photo-initiator benzyl resin group (3), select (at-(dl- Diluents and modifiers are
mixed and mixed (2) A photo initiator is added and applied to the edge, and after application,
light is irradiated with a light source lamp to cure the damping agent.
The proportion of the composition greatly affects the characteristics of the speaker unit, and
therefore, it is necessary to determine the proportion in relation to the needs. Photoreaction
example (5) Photodimerization type resin urethane (B1 photodegradable resin (Q
photopolymerization type resin photopolymerization of epoxy group to open space
polymerization addition polymerization reaction of active hydrogen to vinyl group (5) to (C1
photoreaction formula As is apparent, the damping agent of the present invention is reacted by
light (hr) irradiation, and can be modified depending on the mixing ratio of the components,
including the light irradiation time. As is apparent from the above description, according to the
damping agent for a speaker of the present invention, it is not applied using a solvent, but is
irradiated with light after application for curing, so that it is not necessary to wait for evaporation
of the solvent. The damping agent can be applied as well as curing on the assembly line of the
speaker unit, and since no organic solvent gas is present in the environment of the assembly line,
it can also contribute to the preservation of the sight. In addition, the frequency characteristics of
the speaker using the damping agent according to the invention C2 are improved as compared to
those using the conventional damping agent, and it is improved (= around 300 Hz and the second
and third harmonic distortions. The improvement is remarkable. (Figures 1 and 2)
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a frequency characteristic diagram of a
speaker using a conventional solvent-type control push 1. FIG. 2 is a frequency characteristic
diagram of the speaker according to the present invention (two cans 1 push j) is there. Patent
applicant) Qionia Co., Ltd. Attorney Attorney Kobayashi Nobu Fuyu Attorney Murai Susumu
EndPage: 2
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