Microphone unit
AssigneeFunai Electric Co., Ltd.
InventorsTakeshi Inoda, Ryusuke Horibe, Fuminori Tanaka
Life of this patent
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Abstract
A microphone unit comprises a microphone, leg members and a base. The microphone comprises a diaphragm for detecting sound and a housing for containing the diaphragm. The leg members project outwardly from a rear wall of the housing, and are provided near a second through-hole which connects a second inner space to outer space. The base is connected to the leg members to form a gap between the housing and the base. When the microphone unit thus formed in a simple structure and reduced thickness is mounted in a product, the gap allows the outer space to be connected to the second inner space through the second through-hole, making it possible to efficiently guide sound to the second inner space and obtain good differential characteristics.
Claims16
A microphone unit comprising:
- a vibratory diaphragm for detecting sound;
- a housing having an inner space for containing the vibratory diaphragm;
- at least one leg member projecting outwardly from the housing;
- and
- a base connected to the at least one leg member;
- and
- a cover for covering the housing in which the cover has a first opening and a second opening formed therein,
- wherein the vibratory diaphragm divides the inner space of the housing into a first inner space and a second inner space,
- wherein the housing has a first through-hole formed therein to connect the first inner space and an outer space outside the housing and a second through-hole formed therein to connect the second inner space and the outer space,
- wherein the at least one leg member is provided near the second through-hole,
- wherein the at least one leg member and the base secure a guide path to guide the sound to the vibratory diaphragm via the second inner space,
- wherein a gap to connect the second inner space and the outer space through the second through-hole is formed between the housing and the base or between the base and a part of the at least one leg member,
- wherein the guide path includes the gap, the second through-hole, and the second inner space,
- wherein in a space covered by the cover, a first sound path is formed which connects the first through-hole and the first opening, and a second sound path is also formed which is independent of the first sound path and connects the second through-hole and the second opening, and
- wherein the cover includes at least one plane portion, in which the first opening and the second opening are formed in the same plane portion.
A microphone unit comprising:
- a vibratory diaphragm for detecting sound;
- a housing having an inner space for containing the vibratory diaphragm;
- at least one leg member projecting outwardly from the housing;
- a base connected to the at least one leg member;
- and
- a cover for covering the housing and the base in which the base has a first opening and a second opening formed therein,
- wherein the vibratory diaphragm divides the inner space of the housing into a first inner space and a second inner space,
- wherein the housing has a first through-hole formed therein to connect the first inner space and an outer space outside the housing and a second through-hole formed therein to connect the second inner space and the outer space,
- wherein the at least one leg member is provided near the second through-hole,
- wherein the at least one leg member and the base secure a guide path to guide the sound to the vibratory diaphragm via the second inner space,
- wherein a gap to connect the second inner space and the outer space through the second through-hole is formed between the housing and the base or between the base and a part of the at least one leg member,
- wherein the guide path includes the gap, the second through-hole, and the second inner space, and
- wherein in a space covered by the cover, a first sound path is formed which connects the first through-hole and the first opening, and a second sound path is also formed which is independent of the first sound path and connects the second through-hole and the second opening.
Dependencies are inferred from the claim text.