Waterproof microphone
AssigneeUetax Corporation
InventorMasataka Ueki
Life of this patent
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Abstract
An anterior wall of a case has a central aperture and two discharge apertures extending from the central aperture. There is an anterior chamber inside the anterior wall. Moisture such as rain water, even if entering the anterior chamber, is smoothly discharged out of the case from the discharge apertures along an inner face of the anterior chamber. As a result, it becomes possible to prevent the moisture from remaining and attaching to a first diaphragm in the anterior chamber and to prevent degradation of sound pressure collected by the first diaphragm through the central aperture and the discharge apertures.
Claims7
A waterproof mike, comprising:
- a cylinder-shaped case having an anterior wall;
- and
- a first diaphragm, a second diaphragm and an electrode plate which are disposed in the case in sequence from an anterior wall side toward a rear side, wherein
- an anterior chamber is formed between the anterior wall and the first diaphragm,
- a first gap is formed between the first diaphragm and the second diaphragm,
- a second gap is formed between the second diaphragm and the electrode plate,
- a posterior chamber is formed behind the electrode plate,
- the first gap, the second gap and the posterior chamber are linked,
- the first gap is sealed from the anterior chamber by the first diaphragm, and
- the anterior wall has a discharge aperture overlapped with an inner face of the anterior chamber.
Dependencies are inferred from the claim text.