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US 5,862,242 AGranted
Speaker
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroyuki Takewa, Akihiro Furuta, Kazue Satoh, Mikio Iwasa, Kuniaki Sakai
Life of this patent
Estimating the term…
Abstract
A speaker has a diaphragm of which plane shape as seen from a vibrating direction has a major axis and a minor axis, a band-shaped edge connected to the outer circumference of the diaphragm for holding so that the diaphragm may be free to vibrate, and a frame for holding the outer circumference of the edge, wherein a viscoelastic member is affixed to part of the edge and/or diaphragm.
Claims16
A speaker, comprising:
- a diaphragm having a manor axis and a minor axis;
- a frame;
- and
- a band-shaped edge connected to the diaphragm and engaging a portion of the frame, the edge allowing the diaphragm to freely vibrate,
- wherein at least one viscoelastic member is engaged with a portion of the edge,
- said viscoelastic member suppresses torsional resonance,
- the outer portion of the diaphragm possesses two straight portions substantially parallel to each other and two arc portions linking the two straight portions, and
- the viscoelastic member is engaged at a portion of the edge near a junction point between a straight portion and an arc portion.
5 more elements
A speaker, comprising:
- a diaphragm having a major axis and a minor axis;
- a frame;
- and
- a band-shaped edge connected to the diaphragm and engaging a portion of the frame, the edge allowing the diaphragm to freely vibrate;
- wherein at least one auxiliary mass member is engaged with an interior portion of the diaphragm;
- the auxiliary mass member suppresses torsional resonance;
- and
- the diaphragm has a plate form reinforcing member disposed, as a resistance to torsional resonance, on a concave curved portion of the diaphragm so as to diagonally link the terminal ends of the straight portions.
5 more elements
A speaker, comprising:
- a diaphragm having substantially straight portions defining a major axis;
- a frame;
- a band-shaped edge connected to the diaphragm and engaged with the frame, the edge permitting free vibration of the diaphragm relative to the frame;
- and
- a plate form reinforcing member disposed, as a resistance to torsional resonance, on a concave portion of the diaphragm so as to diagonally link the terminal ends of the straight portions.
2 more elements
A speaker, comprising:
- a diaphragm having a major axis and a minor axis;
- a frame;
- and
- a band-shaped edge connected to the diaphragm and engaging a portion of the frame, the edge allowing the diaphragm to freely vibrate,
- wherein at least one viscoelastic member is engaged with a portion of the edge,
- said viscoelastic member suppresses torsional resonance, and
- the at least one viscoelastic member comprises exactly four viscoelastic members.
4 more elements
Dependencies are inferred from the claim text.