Loudspeaker
A loudspeaker includes: a first loudspeaker unit that includes a first magnetic circuit and a first cone; and a second loudspeaker unit that is disposed on a sound-emitting side of the first loudspeaker unit, and includes a second magnetic circuit and a second cone. The second loudspeaker unit includes a support component that: is fixed to the first magnetic circuit; supports therein the second magnetic circuit; is approximately cylindrical; and includes an end surface to which an entirety of an outer-circumferential portion of the second cone is connected.
1 . A loudspeaker comprising:
a first loudspeaker unit that includes a first magnetic circuit and a first cone; and
a second loudspeaker unit that is disposed on a sound-emitting side of the first loudspeaker unit, and includes a second magnetic circuit and a second cone, wherein
the second loudspeaker unit includes a support component that is fixed to the first magnetic circuit and supports therein the second magnetic circuit, the support component being approximately cylindrical and including an end surface to which an entirety of an outer-circumferential portion of the second cone is connected,
a plurality of grooves are recessed inward from an outer-circumferential surface of the support component, each of the plurality of grooves extending in a cylinder-axis direction of the support component,
a plurality of projecting portions are provided to correspond to the plurality of grooves, each of the plurality of projecting portions projecting inward from an inner-circumferential surface of the support component and extending in the cylinder-axis direction,
each of the plurality of projecting portions is located behind a corresponding one of the plurality of grooves,
the second magnetic circuit is supported by the support component by abutting an end surface of each of the plurality of projecting portions,
each of the plurality of projecting portions has three sides, wherein two sides of the three sides of each of the plurality of projecting portions extend inward from the inner-circumferential surface of the support component, and another one of the three sides of each of the plurality of projecting portions connects between inner ends of the two sides,
each of the plurality of grooves has three sides, wherein two sides of the three sides of each of the plurality of grooves extend inward from the outer-circumferential surface of the support component, and another one of the three sides of each of the plurality of grooves connects between inner ends of the two sides,
an opening side of each of the plurality of projecting portions faces a corresponding one of the plurality of grooves,
a width of each of the plurality of projecting portions is greater than a width of each of the plurality of grooves, and
a depth of each of the plurality of grooves is equal to a thickness of the support component.
2 . The loudspeaker according to claim 1 , wherein
the first loudspeaker unit includes a first voice coil body,
the second loudspeaker unit includes a second voice coil body, and
a surface of the support component and a surface of the first voice coil body that face each other are parallel to each other.
3 . The loudspeaker according to claim 1 , further comprising:
a base component that supports the first magnetic circuit and to which the first cone is directly connected; and
a holding component that sandwiches the first cone with the base component and sandwiches the second cone with the support component.
4 . The loudspeaker according to claim 1 , wherein the width of each of the plurality of grooves is smaller than a depth of each of the plurality of grooves.
5 . The loud speaker according to claim 3 , wherein
the base component includes a first annular portion to which an outer-circumference of the first cone is directly connected, and
the holding component includes:
a second annular portion which, together with the first annular portion of the base component, sandwiches and holds in place the entirety of the outer-circumferential portion of the first cone,
a third annular portion which, together with the end surface of the support component, sandwiches and holds in place the entirety of the outer-circumferential portion of the second cone, and
rod-shaped bridge portions that extend radially and connect between the second annular portion and the third annular portion.
6 . The loud speaker according to claim 5 , wherein the third annular portion is horn shaped, and adjusts a directivity of sound emitted from the second loudspeaker unit.
7 . The loud speaker according to claim 3 , wherein
the support component has a bottom, an outer surface of which is supported by the first magnetic circuit, and
an inner diameter of the support component is constant from a position of an inner surface of the bottom of the support component to a position of a lower surface of the second magnetic circuit accommodated in the support component, the lower surface abutting the end surface of each of the plurality of projecting portions.