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JPH09294295

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DESCRIPTION JPH09294295
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
anti-bacterial headphone having an anti-bacterial function to suppress the growth of bacteria.
[0002]
2. Description of the Related Art The applicant has already disclosed an antibacterial keyboard
having an antibacterial treatment applied to the keyboard of a keyboard instrument (Japanese
Patent Application No. 7-107374). Antibacterial functions have been added to the keyboard,
especially in the case of keyboard instruments, which are often shared by many people in schools
etc. The bacteria attached to the finger of one person is played next via the keyboard It is
because there is a risk of shifting to another person's finger.
[0003]
By the way, recent keyboard instruments include ones such as an electronic piano and an
acoustic piano with a muffling function, which perform music while listening to the performance
sound with headphones. Needless to say, when using headphones, the ear pad will be applied
directly to the ear. Therefore, in view of the recent increase in cleanliness, it is preferable to
always maintain cleanliness not only on the keyboard but also on the headphones to prevent the
entry of bacteria into the body through the ears.
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1
[0004]
The present invention has been made to solve such problems, and it is an object of the present
invention to provide an antibacterial headphone which can always maintain cleanliness by
suppressing the growth of bacteria in the ear pad. And
[0005]
[Means for Solving the Problems] In order to achieve the above object, the antibacterial
headphone of the present invention is provided with an ear pad attached to the ear, and at least a
portion of the ear pad contacting the ear is subjected to an antibacterial treatment. It is
characterized by being done.
According to this anti-bacterial headphone, since the anti-bacterial treatment is applied to the
part of the ear pad in contact with the ear, by the action of the anti-bacterial agent contained
therein, the proliferation of bacteria is prevented at the contact area with the ear , Cleanliness is
always kept. As a result, headphones can be used safely without worrying about the entry of
bacteria into the body through the ear.
[0006]
In this case, it is preferable that the ear pad portion has a case and a cover removably attached to
the inside of the case, and the cover is made of a synthetic resin formed by mixing an
antibacterial agent. . According to this configuration, the cover can be in contact with the ear, and
the antibacterial function can be easily added to the cover only by mixing the antibacterial agent
with the synthetic resin before molding. Also, since the cover is configured to be removable from
the case, if the antibacterial effect is weakened due to long-term use, etc., the antibacterial
function can be easily recovered simply by replacing the cover with a new one. be able to.
[0007]
In this case, the antimicrobial agent is preferably mixed in a proportion of 0.5 to 2.0% by weight
with respect to the synthetic resin. When the content of the antibacterial agent is less than 0.5%,
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2
the antibacterial effect is not sufficiently exhibited, but when the content exceeds 2.0%, the
antibacterial effect does not increase so much and the cost becomes high and the relation such as
strength etc. Molding becomes difficult. Therefore, by setting the content of the antibacterial
agent in the above range, the antibacterial effect can be efficiently exhibited.
[0008]
In these cases, the antibacterial agent preferably contains one or more metals selected from the
group consisting of silver, copper and zinc. Since all of these metals have antibacterial activity,
the antibacterial effect can be effectively exhibited by mixing with a synthetic resin. Among these
metals, metallic silver is used as a dental crown or a dish, and is particularly preferable because it
is highly safe for the human body. In that case, it is more preferable to use calcium phosphate as
a carrier for supporting metallic silver. Calcium phosphate is used for food additives and
cosmetic raw material standards, and like metal silver, is superior in safety.
[0009]
Alternatively, it is preferable that the antibacterial agent is a ceramic body in which metallic
silver and calcium phosphate are sintered and mixed. Such a ceramic body is produced, for
example, by sintering a mixture of calcium phosphate and a silver compound at a high
temperature of 1000 ° C. or more, and in the sintering process, all silver ions in the silver
compound are metallic silver. Ru. Since the ceramic body is highly heat-treated, there is no risk of
decomposition, deterioration or discoloration even when mixed and molded in a synthetic resin,
and there is no elution or volatilization, and the stability is excellent. Even when used, it retains
its antimicrobial activity. In addition, no discoloration occurs due to the elution of silver ions.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present
invention will now be described in detail with reference to the drawings. FIG. 1 shows a
headphone to which the present invention is applied. This antibacterial headphone 1 is used, for
example, for an electronic piano with a muffling function, and from the headband 2, a pair of ear
pads 3 and 3 attached to both ends of the head band 2, and the ear pads 3 It has an extending
cord 4 and a plug 5 at its tip. In the case of a muffling performance, the plug 5 is connected to a
headphone output terminal (not shown) of the electronic piano, and the ear pads 3 are placed on
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both ears to play while listening to the performance sound.
[0011]
Each ear pad portion 3 is composed of a case 6 and a cover 7 attached to the inside, and both are
formed by integrally molding a synthetic resin. The cover 7 has a shape as shown in FIG. 2 and is
detachably attached to the case 6 by screwing or fitting with the case 6 or the like. Further, since
the cover 7 corresponds to a portion directly in contact with the ear, the cover 7 is manufactured
while being subjected to an antimicrobial treatment, for example, by the following method.
[0012]
Using a pellet of methyl methacrylate resin as an acrylic resin and using "Apacider A"
(manufactured by Sangi Co., Ltd.) as an antibacterial agent, mixing 0.5 to 2.0% by weight of
Apacider A with respect to methyl methacrylate resin, After uniformly dispersing, the cover 7 is
molded by an injection molding machine. Apacider A is made by supporting metallic silver on
calcium phosphate (hydroxyapatite or tricalcium phosphate) as a carrier, and sintered a mixture
of calcium phosphate and a silver compound at a high temperature of 1000 ° C. or higher. In
the sintering process, a ceramic body in which all silver ions in the silver compound are metallic
silver is manufactured. The fact that all the silver ions have become metallic silver can be
confirmed by atomic absorption analysis (analytical limit: 0.05 ppm) and that the silver ions do
not elute completely in water.
[0013]
As described above, according to this antibacterial headphone 1, since the cover 7 in direct
contact with the ear when used is made of a synthetic resin mixed with an antibacterial agent, the
antibacterial action of the antibacterial agent causes the cover 7 to It can prevent the growth of
bacteria and keep it clean at all times. Therefore, it is possible to perform comfortably and safely
without worrying about the invasion of bacteria into the body through the ear. Moreover, since
the cover 7 is originally manufactured by shaping ¦ molding of a synthetic resin, an antimicrobial
effect can be easily provided only by mixing an antibacterial agent before shaping ¦ molding like
this embodiment.
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[0014]
Furthermore, since Apacider A, a ceramic body in which metallic silver and calcium phosphate
are sintered and mixed is used as an antibacterial agent, it is stable because of its high safety to
the human body and the environment due to its components. It is also excellent in sex and can
exert its antibacterial effect over a long period of time. In addition, since the cover 7 is
detachably attached to the case 6, even if the antibacterial effect is weakened by long-term use
etc., the antibacterial function can be easily recovered simply by replacing the cover 7 with a new
one. It can be done.
[0015]
In addition, this invention can be implemented in various aspects, without being limited to the
described embodiment. For example, although the embodiment has described an example in
which the present invention is applied to headphones for an electronic piano, it goes without
saying that the present invention can also be applied to headphones used for other applications
such as for audio equipment. Further, as a modified example of the present invention, for
example, it is also possible to apply to an earphone such as a portable tape recorder.
Furthermore, the type of antibacterial agent is not limited to the exemplified Apacider A, that is, a
ceramic body in which metallic silver and calcium phosphate are sintered and mixed, and may
contain other metals such as copper and zinc having antibacterial activity. A carrier other than
calcium phosphate may be used as a carrier, and it is not essential to use a form of a ceramic
body. In addition, the configuration of the details can be changed as appropriate without
departing from the spirit of the present invention.
[0016]
As described above in detail, the antibacterial headphone of the present invention has the effect
that cleanliness can always be maintained by suppressing the growth of bacteria in the ear pad.
[0017]
Brief description of the drawings
[0018]
1 is a perspective view of an antibacterial headphone to which the present invention is applied.
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[0019]
2 is a perspective view showing a cover of the antibacterial headphone of FIG.
[0020]
Explanation of sign
[0021]
1 antibacterial headphone 3 ear pad 6 case 7 cover
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