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Industrial application Field: Speakers installed in a clean room. Conventional technology When a
speaker is installed as a broadcasting facility in an indoor space subjected to dust and dust
removal processing to maintain air cleanliness above a certain level, such as clean rooms for
manufacturing semiconductor devices and bio clean rooms, the conventional technology is
shown in FIG. A common speaker has been used. That is, no consideration was given to dusting
or dusting. Problems to be Solved by the Invention In the conventional speaker as described
above, when the sound of the sound is generated, if the cone material is made of paper, dust is
generated from the cone itself if it is made of paper. In addition, room air is constantly circulated
and ventilated in order to maintain the air cleanliness at a certain level or more in the O clean
room where dust is generated depending on the material by vibrating the speaker front cover 6
due to air vibration generated from the cone 2 However, the air inside the speaker is stagnant
without being ventilated to the inside of the speaker. Therefore, even if the material of each part
of the speaker is less dusty, dust accumulates or drifts inside the speaker as time passes. Every
time a sound is generated, this dust is diffused from the speaker front cover into the clean room
by the vibration of the cone or air vibration to reduce the cleanliness of the clean room. In
general, the speakers are usually installed in the ceiling or the upper wall of the room in a
recessed or wall mounted manner, and since the air flow in the clean room flows from the ceiling
to the floor surface, the lower side of the speaker mounting position However, there was a
problem that the degree of cleanliness decreased. The present invention solves such a problem,
and aims to provide a speaker free from dusting and thus to not reduce the cleanliness in a clean
room. Means for Solving the Problems In order to solve these problems, the present invention is
equipped with a HEPA filter on the front of the speaker. Operation With this configuration, even
if dust is generated inside the speaker, the diffusion of dust is blocked by the HICP filter.
Embodiment FIG. 1 shows an embodiment of the present invention. FIG. 1 a shows the case
where the HIP human filter 4 is provided on the front of the cone 2. FIG. 1 shows an embodiment
in which in the case of a normal speaker having a speaker front cover 6 on the front of a cone 2,
an HICP filter is further provided on the front. As described above, according to the present
invention, it is possible to prevent the diffusion of dust from the main body of the speaker into
the clean room, and to provide a clean room in which the cleanliness does not decrease even
when sound is generated.
In addition, even when it is necessary to use a dusting material for the main body of the speaker
in order to exert the speaker performance sufficiently, the diffusion of dust into the clean room
can be prevented.
Brief description of the drawings
FIG. 1 is a cross-sectional view of a speaker showing an embodiment of the present invention,
and FIG. 2 is a cross-sectional view of a conventional speaker.
1 ...... magnet unit, 2 ...... corn, 3 ...... speaker hoxY, 4 ...... HICP beam filter, 6 ...... speaker front
cover . Agent's Name Attorney Nakao Toshio One more restaurant 12I 1 size. 2.2 閣 − / -J1 Ishi
邪? -Corn J-S C-717-Oshijima Kushi 4 HEPA) Luther 5-Z Eno-i Face or P 1 Ichino
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