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US 8,045,745 B2Granted
Edge support for a speaker apparatus comprising multiple ridges
AssigneesPioneer Corporation, Tohoku Pioneer Corporation
InventorsMinoru Horigome, Teruaki Kaiya, Yuichi Takahashi
Life of this patent
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Abstract
According to an embodiment of the invention, there is provided a speaker apparatus includes: a voice coil bobbin; and a diaphragm that is vibrated by the voice coil bobbin, the diaphragm including an edge portion at an outer circumference of the diaphragm, the edge portion including at least two ridge portions protruding forward.
Claims5
A speaker apparatus comprising:
- a diaphragm having an effective vibration area S1;
- and
- a drive cone having an effective vibration area S2, wherein:
- outer circumferences of the diaphragm and the drive cone are fixed to supporting portions of a frame via a first edge and a second edge respectively;
- a closed space defined by the diaphragm and the drive cone, the closed space has a volume V;
- a spring constant of an air spring in the closed space is proportional to (S1−S2)/V;
- and the first edge includes at least two ridge portions protruding forward so the spring constant is reduced by reducing a value of (S1−S2);
- and
- the at least two ridge portions begin at the outer circumference of the diaphragm;
- wherein each of the ridge portions has an apex angle that is configured to be within a range from 50 to 65 degrees.
7 more elements
A speaker apparatus comprising:
- a voice coil bobbin;
- a frame having first and second supporting portions;
- a diaphragm including an edge portion at an outer circumference of the diaphragm fixed to the first supporting member;
- and
- a drive member arranged coaxially with the diaphragm along a driving direction, the drive member being connected to the diaphragm, the outer circumference of the drive member fixed to the second supporting member, the drive member transmitting a vibration of the voice coil bobbin to the diaphragm;
- wherein the frame, the diaphragm and the drive member define a closed space,
- wherein a vibration system is supported by spring property of a gas included in the closed space,
- wherein the edge portion includes at least two ridge portions protruding frontward
- wherein the at least two ridge portions begin at the outer circumference of the diaphragm, and
- wherein each of the ridge portions has an apex angle that is configured to be within a range from 50 to 65 degrees.
7 more elements
Dependencies are inferred from the claim text.