Variable stiffness diaphragm for a playback device
AssigneeSonos, Inc.
InventorsWei Yang, Charles LaColla
Life of this patent
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Abstract
A diaphragm for an audio transducer includes an annular body defining a central aperture, a first surface of the body extending between a radially inner edge adjacent the aperture and a radially outer edge, and a second surface of the body opposite the first surface, the second surface extending between the radially inner edge and the radially outer edge. Along a first azimuthal direction, the body has a first range of thicknesses extending between the first and second surfaces. Along a second azimuthal direction, the body has a second range of thicknesses extending between the first surface and the second surface, the second range of thicknesses being different than the first range of thicknesses.
Claims20
A diaphragm for an audio transducer, the diaphragm comprising:
- a body having a first surface extending between a radially inner edge and a radially outer edge;
- and
- a second surface of the body opposite the first surface, the second surface extending between the radially inner edge and the radially outer edge,
- wherein the body includes a major axis defined as having the longest length across the body and a minor axis defined as having the shortest length across the body, and
- wherein a thickness extending between the first surface and the second surface increases along a circumferential axis surrounding a central aperture as it approaches the major axis and the thickness decreases along the circumferential axis as it approaches the minor axis.
A diaphragm for an audio transducer, the diaphragm comprising:
- an annular body defining a central aperture;
- a first surface of the body extending between a radially inner edge adjacent the aperture and a radially outer edge;
- and
- a second surface of the body opposite the first surface, the second surface extending between the radially inner edge and the radially outer edge,
- wherein along a first azimuthal direction, the body has a first range of stiffnesses extending between the radially inner edge and the radially outer edge, the first range of stiffnesses comprising a first stiffness adjacent the radially inner edge and a second stiffness adjacent the radially outer edge, the first stiffness being different from the second stiffness, wherein a thickness of the body between the first surface and the second surface increases monotonically along the first azimuthal direction from the radially inner edge to the radially outer edge, and
- wherein along a second azimuthal direction, the body has a second range of stiffnesses extending between the radially inner edge and the radially outer edge, the second range of stiffnesses comprising a third stiffness adjacent the radially inner edge and a fourth stiffness adjacent the radially outer edge, the third stiffness being different from the fourth stiffness.
Dependencies are inferred from the claim text.