Speaker
AssigneeMitsubishi Electric Corporation
InventorsNaomichi Yanagidate, Tsuyoshi Nakada
Life of this patent
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Abstract
A speaker includes a main-cone and a sub-cone. Linear thin portions configured to reduce a plate thickness of the sub-cone are formed on a region containing at least any one of an outer side and an inner side of the sub-cone. Each of the linear thin portions has both of a component in a radial direction and a component in a circumferential direction of the sub-cone. First and second linear thin portions cross each other at an intersection. With this configuration, stiffness of the whole sub-cone is reduced to enhance a divided vibration of the sub-cone. In particular, a vibrational displacement of an outer peripheral portion of the sub-cone, from which a sound is mainly radiated, is increased.
Claims15
A speaker, comprising:
- a main-cone;
- and
- a sub-cone,
- wherein a first linear thin portion and a second linear thin portion that reduce a thickness of the sub-cone are formed on the sub-cone,
- the first linear thin portion and the second linear thin portion have an intersection on a surface of the sub-cone,
- wherein a depth of each of the first linear thin portion and the second linear thin portion is 35% of a plate thickness of the sub-cone or smaller.
A speaker, comprising:
- a main-cone;
- and
- a sub-cone,
- wherein a first linear thin portion and a second linear thin portion are formed on the sub-cone, and
- the first linear thin portion and the second linear thin portion have an intersection on the sub-cone,
- wherein a width of each of the first linear thin portion and the second linear thin portion is 3.5% or smaller of a total length of an outer peripheral portion of the sub-cone.
A speaker, comprising:
- a main-code;
- and
- a sub-cone,
- wherein a first linear thin portion and a second linear thin portion that reduce a thickness of the sub-cone are formed on the sub-cone,
- the first linear thin portion and the second linear thin portion have an intersection on a surface of the sub-cone,
- wherein, when a position of an outer peripheral portion of the sub-cone is defined as 100% in a radial direction based on an inner peripheral portion of the sub-cone as a base point, the intersection between the first linear thin portion and the second linear thin portion is positioned at 55% or smaller.
Dependencies are inferred from the claim text.