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US 7,515,728 B2Granted
Speaker apparatus
AssigneesPioneer Corporation, Tohoku Pioneer Corporation
InventorsHiroyuki Kobayashi, Kyoichi Matsuda
Life of this patent
Estimating the term…
Abstract
A speaker apparatus including: a first diaphragm; a second diaphragm arranged coaxial with the first diaphragm along a driving direction; a frame having diaphragm supporting portions; and a voice-coil bobbin, wherein outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively, inner circumferential portions of the first diaphragm and the second diaphragm are connected together and fixed to the voice-coil bobbin so as to make a sealed space between the first diaphragm, the second diaphragm and the frame, and the voice-coil bobbin is supported by springiness of a gas contained in the sealed space.
Claims23
A speaker apparatus comprising:
- a first diaphragm;
- a second diaphragm arranged coaxial with the first diaphragm along a driving direction;
- a frame having diaphragm supporting portions;
- and
- a voice-coil bobbin, wherein
- outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively,
- the second diaphragm has an inner edge and an outer edge and has a curved shape, wherein a distance from the inner edge to an apex of the curve is substantially the same distance as a distance from the outer edge to the apex of the curve;
- an inner circumferential portion of the first diaphragm is connected to the second diaphragm at a contact portion substantially at the apex of the curve, and the inner edge of the second diaphragm is fixed directly to the voice-coil bobbin so as to make a sealed space between the first diaphragm, the second diaphragm and the frame, and
- the voice-coil bobbin is supported by springiness of a gas contained in the sealed space.
6 more elements
A speaker apparatus comprising:
- a first diaphragm;
- a second diaphragm arranged coaxially with the first diaphragm along a driving direction;
- a frame having a first diaphragm support and a second diaphragm support;
- and
- a voice-coil bobbin,
- wherein the first diaphragm support is spaced apart from the second diaphragm support on the frame in the driving direction,
- wherein an outer circumferential portion of the first diaphragm is connected to the first diaphragm support and an outer circumferential portion of the second diaphragm is connected to the second diaphragm support,
- the second diaphragm has an inner edge and an outer edge and has a curved shape, wherein a distance from the inner edge to an apex of the curve is substantially the same distance as a distance from the outer edge to the apex of the curve;
- wherein a contact portion of the first diaphragm, which is located inwardly from the outer circumferential portion of the first diaphragm, contacts a contact portion of the second diaphragm at a contact portion which is disposed substantial at the apex of the curve of the second diaphragm,
- wherein the inner edge of the second diaphragm contacts the voice coil bobbin at a bobbin contact point
- wherein the contact portion of the first diaphragm contacts the contact portion of the second diaphragm at the contact point to make a sealed space defined by the first diaphragm, the second diaphragm, and the frame;
- and
- wherein the voice-coil bobbin is supported by springiness of a gas contained in the sealed space.
10 more elements
A speaker apparatus comprising:
- a first diaphragm;
- a second diaphragm arranged coaxial with the first diaphragm along a driving direction;
- a frame having diaphragm supporting portions;
- a voice-coil bobbin;
- and
- a dust cap, wherein
- outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively,
- the second diaphragm has an inner edge and an outer edge and has a curved shape, wherein a distance from the inner edge to an apex of the curve is substantially the same distance as a distance from the outer edge to the apex of the curve;
- an inner circumferential portion of the first diaphragm is connected to the second diaphragm at a connecting portion which is disposed substantially at the apex of the curve of the second diaphragm,
- the inner edge of the second diaphragm is fixed directly to the voice-coil bobbin at a bobbin contact point, and
- the dust cap is located near the connecting portion.
8 more elements
A speaker apparatus comprising:
- a first diaphragm;
- a second diaphragm arranged coaxial with the first diaphragm along a driving direction;
- a frame having diaphragm supporting portions;
- a voice-coil bobbin;
- and
- a dust cap,
- wherein an outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively,
- the second diaphragm has an inner edge and an outer edge and has a curved shape, wherein a distance from the inner edge to an apex of the curve is substantially the same distance as a distance from the outer edge to the apex of the curve;
- wherein an inner circumferential portion of the first diaphragm is connected to the second diaphragm at a connecting portion which is disposed substantially at the apex of the curve of the second diaphragm,
- wherein the inner edge of the second diaphragm is fixed directly to the voice-coil bobbin,
- wherein the dust cap is located near the connecting portion,
- wherein the first diaphragm and the second diaphragm include a diaphragm body respectively, which is made of a different member from each outer circumferential portion.
9 more elements
A speaker apparatus comprising:
- a first diaphragm;
- a second diaphragm arranged coaxial with the first diaphragm along a driving direction;
- a frame having diaphragm supporting portions;
- a voice-coil bobbin;
- and
- a dust cap, wherein
- outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively,
- the second diaphragm has an inner edge and an outer edge and has a curved shape, wherein a distance from the inner edge to an apex of the curve is substantially the same distance as a distance from the outer edge to the apex of the curve;
- an inner circumferential portion of the first diaphragm is connected to the second diaphragm at a connecting portion which is disposed substantially at the apex of the curve of the second diaphragm and the second diaphragm is fixed to the voice-coil bobbin at a bobbin contact point,
- the dust cap is located near the connecting portion.
7 more elements
A speaker apparatus comprising:
- a first diaphragm;
- a second diaphragm arranged coaxial with the first diaphragm along a driving direction;
- a frame having diaphragm supporting portions;
- a voice-coil bobbin;
- and
- a dust cap,
- wherein outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively,
- the second diaphragm has an inner edge and an outer edge and has a curved shape, wherein a distance from the inner edge to an apex of the curve is substantially the same distance as a distance from the outer edge to the apex of the curve;
- wherein an inner circumferential portion of the first diaphragm is connected to the second diaphragm substantially at the apex of the curve of the second diaphragm and the second diaphragm is fixed directly to the voice-coil bobbin,
- wherein the dust cap is located near the connecting portion, and
- wherein the first diaphragm and the second diaphragm include a diaphragm body respectively, which is made of a different member from each outer circumferential portion.
8 more elements
A speaker apparatus comprising:
- a first diaphragm;
- a second diaphragm arranged coaxial with the first diaphragm along a driving direction;
- a frame having diaphragm supporting portions;
- a voice-coil bobbin;
- and
- a dust cap, wherein
- outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively,
- the second diaphragm has an inner edge and an outer edge and has a curved shape, wherein a distance from the inner edge to an apex of the curve is substantially the same distance as a distance from the outer edge to the apex of the curve;
- the inner edge of the second diaphragm is fixed to the voice-coil bobbin at a bobbin contact point,
- the dust cap is located near the connecting portion,
- the apex of the curve of the second diaphragm includes a flexion portion that is convexly curved toward the first diaphragm;
- and
- the connecting portion is located near the flexion portion.
10 more elements
Dependencies are inferred from the claim text.