Micro-electroacoustic device
View Patent ↗A micro-electroacoustic device includes a holder forming a hollow space, a magnetic system received in the hollow space, a vibrating system having a diaphragm and a coil driving the diaphragm for vibrating along a vibrating direction. The diaphragm is assembled with the holder and has an upper edge portion and a lower edge portion connected with the upper edge portion and assembled with the holder. The upper edge portion has a protruding part protruding away from the magnetic system and the lower edge portion has a recessed part recessed towards the magnetic system for supporting the voice coil evenly.
1. A micro-electroacoustic device comprising:
a holder forming a hollow space;
a magnetic system received in the hollow space and comprising a magnetic gap;
a vibrating system comprising a diaphragm and a coil driving the diaphragm for vibrating approaching and away from the magnetic system along a vibrating direction, the diaphragm assembled with the holder and comprising:
an upper edge portion having a protruding part protruding in the direction opposite to the magnetic system, a first inner part extending from one end of the protruding part, a through hole surrounded by the first inner part, and a first outer part extending from the other end of the protruding part;
a dome part having a main curve portion passed through the through hole of the upper edge portion and a connecting portion extending from the main curved portion, located below the first inner part of the upper edge portion, and connected with the first inner part of the upper edge portion;
a lower edge portion located below the upper edge portion, the lower edge portion having a recessed part recessed towards the magnetic system, a second inner part extending from one end of the recessed part, and a second outer part extending from the other end of the recessed part; and
a suspension connected with the diaphragm and having an inner ring portion, a center opening surrounded by the inner ring portion, and an outer ring portion surrounding the inner ring portion and fixed on the holder, the inner ring portion located between the connecting portion of the dome part and the second inner part of the lower edge and connected with the connecting portion of the dome part and the second inner part of the lower edge, the outer ring portion located between the first and second outer parts and connected with the first and second outer parts.
2. The micro-electroacoustic device as claimed in claim 1 , wherein the first inner part is coplanar with the first outer part and the second inner part is coplanar with the second outer part.
3. The micro-electroacoustic device as claimed in claim 1 , wherein the protruding part and the recessed part are symmetrical with the suspension.
4. A micro-electroacoustic device comprising:
a holder forming a hollow space;
a magnetic system received in the hollow space and comprising a magnetic gap;
a vibrating system comprising a diaphragm and a coil driving the diaphragm for vibrating approaching and away from the magnetic system along a vibrating direction, the diaphragm assembled with the holder and comprising:
an upper edge portion having a protruding part protruding in the direction opposite to the magnetic system, a first inner part extending from one end of the protruding part, a through hole surrounded by the first inner part, and a first outer part extending from the other end of the protruding part; and
a lower edge portion located below the upper edge portion, the lower edge portion having a recessed part recessed towards the magnetic system, a second inner part extending from one end of the recessed part, and a second outer part extending from the other end of the recessed part; and
a suspension sandwiched between the upper and lower edge parts for connecting the upper and lower edge parts, and having an inner ring portion, a center opening surrounded by the inner ring portion, and an outer ring portion surrounding the inner ring portion and fixed on the holder, the inner ring portion located between the first and second inner parts and connected with the first and second inner parts, the outer ring portion located between the first and second outer parts and connected with the first and second outer parts;
Wherein the diaphragm further has a dome part having a main curve portion and a connecting portion extending from the main curved portion, the connecting portion of the dome part is sandwiched between the inner ring portion of the suspension and the second inner part of the lower edge portion and connected with the inner ring portion of the suspension and the second inner part of the lower edge portion for supporting the suspension together with the lower edge portion, the main curved portion is passed through the central opening and the through hole respectively for increasing the frequency band range.
5. The micro-electroacoustic device as claimed in claim 4 , wherein one end of the voice coil is connected with the connecting portion.
6. The micro-electroacoustic device as claimed in claim 4 , wherein the first inner part is coplanar with the first outer part and the second inner part is coplanar with the second outer part.
7. The micro-electroacoustic device as claimed in claim 4 , wherein the protruding part and the recessed part are symmetrical with the suspension.