Back to results
US 12,581,241 B2Granted
Loudspeaker
AssigneePanasonic Automotive Systems Co., Ltd.
InventorSatoshi Itoh
Life of this patent
Estimating the term…
Abstract
A loudspeaker includes: a diaphragm; a magnetic circuit; a frame that holds the magnetic circuit; an edge that is annular and connects the diaphragm and the frame; and a voice coil body that is disposed in a magnetic gap of the magnetic circuit. The diaphragm includes: a central portion; and an outer-circumferential portion that is provided as a single piece together with the central portion in an outer periphery of the central portion, and is bonded to the edge at a location in a vicinity of the central portion.
Claims6
A loudspeaker comprising:
- a diaphragm;
- a magnetic circuit;
- a frame that holds the magnetic circuit;
- an edge that is annular and connects the diaphragm and the frame;
- and
- a voice coil body that is disposed in a magnetic gap of the magnetic circuit, wherein
- the diaphragm includes:
- a central portion;
- and
- an outer-circumferential portion that is provided as a single piece together with the central portion in an outer periphery of the central portion, and is bonded to the edge at a location in a vicinity of the central portion,
- the edge includes:
- a down-roll portion that is located outward from a bonding portion that is bonded to the outer-circumferential portion, and
- an outer-circumferential edge of the outer-circumferential portion is located outward from a trough line of the down-roll portion of the edge.
10 more elements
Dependencies are inferred from the claim text.