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JPH02250499

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DESCRIPTION JPH02250499
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to
earphones, and more particularly to an earphone of the type in which a part of the earphones
abuts on the outer ear. [Prior Art: Problem to be Solved by the Invention] In recent years,
earphones of a type that abuts on the outer ear are often used in so-called headphone stereos
and the like. By the way, in the outer ear, secretions from the ear canal, sebum, dusts and
moisture in the air, and other miscellaneous things adhere and deposit, and bacteria such as E.
coli and modified bacteria are easily propagated, and it is extremely unsanitary. is there. In
particular, the use of another person's earphone may cause various bacteria to invade through
the earphone, which is not preferable in terms of hygiene. An object of the present invention is to
eliminate such drawbacks of the prior art and to provide a hygienic earphone. [Means for Solving
the Problems] In order to achieve this object, the present invention is characterized in that an
antibacterial agent such as zeolite fine particles in which an antibacterial agent is supported in
pores is present at least on the surface of the ear pad. It is characterized by [Function] As
described above, the present invention can suppress or actively kill the growth of bacteria in the
vicinity of the outer ear by providing an antibacterial agent on at least the surface of the ear pad.
We can always provide hygienic earphones. Next, an embodiment of the present invention will be
described with reference to the drawings. FIG. 1 is a cross-sectional view showing a basic
configuration for explaining an embodiment of the present invention, in which 1 is a magnet, 2 is
a pole piece, 3 is a voice coil, 4 is a diaphragm, 5 is an earpiece Part 6 is a casing. The ear pad
portion 5 is carried in a state where the antibacterial agent is uniformly dispersed in an open cell
foam such as polyurethane or silicone rubber. The anti-concave agent comprises zeolite fine
particles supported by ion-exchange of metal ions having an antibacterial action such as silver
ions, copper ions and zinc ions. Synthetic zeolite is awarded as this zeolite. This synthetic zeolite
has a three-dimensionally developed framework structure, and the chemical composition is
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generally represented by xMz / no ・ Aj2gO3 ・ ySing ・ zH20 based on A /, O, and M is an ion
An exchangeable metal ion is shown, and n is its valence. And since a part of silicon is substituted
by tetrahedral aluminum having a coordination number of 4, positive charge is insufficient, and
in order to compensate for the deficiency, metal ions having antibacterial properties such as
silver ion, H4 ion, zinc ion, etc. It can be well held in the crystal. The synthetic zeolite threedimensionally has pores of 10 angstroms or less and has a specific surface area of about 150 m
"/ g, and in particular, zeolite A, zeolite X and zeolite Y are suitable.
In addition, as the antibacterial agent, it is also possible to use an organic compound such as
benzoic acid, salicylic acid, parachlorometacresol, cololhexidine gluconate, resorcin and the like.
FIGS. 2, 3 and 4 are perspective views of an actual earphone, and in the case of the embodiment
of FIG. 2, a coated film 5a of an antibacterial agent is formed on the entire ear pad 5. FIG.
Specifically, the ear pad 5 is a so-called open-cell sponge-like one made by foaming a
polyurethane resin, and synthetic zeolite as an antibacterial agent is attached to the inside of the
air bubble, and at least the surface has an antibacterial agent Configured. In this case, the surface
of the sponge-like ear pad may be covered with a sheet-like separate material, for example, a
flexible sheet-like separate material such as cloth or leather, and the antibacterial agent may be
adhered to this surface. In particular, if the sheet-like separate material can be replaced with the
ear pad 5, it is possible to prevent the decrease in the antibacterial effect caused by the stain and
the drop of the antibacterial agent. In the case of the embodiment shown in FIG. 3, a plurality of
flexible rubber projections 5b in close contact with the outer ear are provided on the outer
peripheral portion of the earrest 5 and the above-mentioned antibacterial agent is applied to the
projections 5b. The agent is carried. As this protrusion 5b, as shown in FIG. 3, it can be made into
a rib-like thing long in the insertion direction to an outer ear part, or hemispherical protrusion
shape. Furthermore, as another shape of this protrusion, in the case of the embodiment shown in
FIG. 4, a ring portion 5C in close contact with the outer ear portion is provided on the outer
peripheral portion of the earrest portion 5, and the antibacterial agent is carried thereon. . By
providing the rib-like protrusions 5b and the ring portions 5c on the ear pad 5 in this manner,
the ear contacts are firmly in close contact locally, and the earphone is prevented from being
displaced. [Effects of the Invention] As described above, the present invention can suppress or
kill the growth of various bacteria in the ear pad by the presence of the antibacterial agent on at
least the surface of the ear pad, so that hygiene is always achieved. Earphones can be provided.
[0002]
Brief description of the drawings
[0003]
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FIG. 1 is a cross-sectional view showing a basic configuration of an earphone for explaining an
embodiment of the present invention, and FIGS. 2, 3 and 4 are perspective views of the earphone
according to another embodiment.
5: Ear rest part, 5a: Coating, 5b: Rib, 5c: Ring part. Figure 3 Figure 4 Figure 2
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