Tubular body, bass reflex port, and acoustic apparatus
First Claim
1. A tubular body having an air flow passage therein,wherein an area of a perpendicular cross section of a space enclosed with an inner wall of the tubular body increases toward an open end of the tubular body, the perpendicular cross section being a cross section of the space in a direction perpendicular to a tube axis of the tubular body,wherein, when the inner wall in a cross section of an end portion of the tubular body in the direction perpendicular to the tube axis is viewed from the tube axis, a convex portion at which the inner wall protrudes in a direction away from the tube axis and a concave portion at which the inner wall is recessed in a direction toward the tube axis are repeatedly formed along a circumferential direction of the inner wall, andwherein, in each of the convex portion and the concave portion, a curvature of the inner wall of the tubular body near the open end is increased and decreased along the circumferential direction of the inner wall.
1 Assignment
0 Petitions
Accused Products
Abstract
A tubular body having an air flow passage, wherein an area of a cross section, in a direction perpendicular to a tube axis, of a space enclosed with an inner wall of the tubular body increases toward an open end thereof, wherein a curvature of the inner wall at an end portion of the tubular body near the open end is repeatedly increased and decreased along a circumferential direction of the inner wall, and wherein, when the inner wall in a cross section of the end portion in the direction perpendicular to the tube axis is viewed from the tube axis, a convex portion at which the inner wall protrudes in a direction away from the tube axis and a concave portion at which the inner wall is recessed in a direction toward the tube axis are repeatedly formed along the circumferential direction.
8 Citations
16 Claims
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1. A tubular body having an air flow passage therein,
wherein an area of a perpendicular cross section of a space enclosed with an inner wall of the tubular body increases toward an open end of the tubular body, the perpendicular cross section being a cross section of the space in a direction perpendicular to a tube axis of the tubular body, wherein, when the inner wall in a cross section of an end portion of the tubular body in the direction perpendicular to the tube axis is viewed from the tube axis, a convex portion at which the inner wall protrudes in a direction away from the tube axis and a concave portion at which the inner wall is recessed in a direction toward the tube axis are repeatedly formed along a circumferential direction of the inner wall, and wherein, in each of the convex portion and the concave portion, a curvature of the inner wall of the tubular body near the open end is increased and decreased along the circumferential direction of the inner wall.
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13. A bass reflex port which has open ends at its opposite ends thereof and which is an air flow passage connecting an interior and an exterior of an enclosure of a speaker,
wherein an area of a perpendicular cross section of a space enclosed with an inner wall of the bass reflex port having a tubular shape increases in directions toward the open ends of the bass reflex port, the perpendicular cross section being a cross section of the space in a direction perpendicular to a tube axis of the bass reflex port, wherein one of the open ends of the bass reflex port is fixed to an opening portion formed in a baffle board of the enclosure, wherein, when the inner wall in a cross section of at least one of a first end portion that is near to the one of the open ends and a second end portion that is near to the other of the open ends in the direction perpendicular to the tube axis is viewed from the tube axis, a convex portion at which the inner wall protrudes in a direction away from the tube axis and a concave portion at which the inner wall is recessed in a direction toward the tube axis are repeatedly formed along a circumferential direction of the inner wall, and wherein, in each of the convex portion and the concave portion, a curvature of the inner wall at the at least one of the first end portion and the second end portion is increased and decreased along the circumferential direction of the inner wall.
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15. An acoustic apparatus comprising:
- a cabinet having an opening portion; and
a tubular body which is disposed in the cabinet and which has open ends at its opposite ends, one of the open ends of the tubular body being fixed to the opening portion of the cabinet so as to form an air flow passage connecting an interior and an exterior of the cabinet,wherein an area of a perpendicular cross section of a space enclosed with an inner wall of the tubular body increases in directions toward the open ends of the tubular body, the perpendicular cross section being a cross section of the space in a direction perpendicular to a tube axis of the tubular body, wherein, when the inner wall in a cross section of at least one of a first end portion that is near to the one of the open ends and a second end portion that is near to the other of the open ends in the direction perpendicular to the tube axis is viewed from the tube axis, a convex portion at which the inner wall protrudes in a direction away from the tube axis and a concave portion at which the inner wall is recessed in a direction toward the tube axis are repeatedly formed along a circumferential direction of the inner wall, and wherein, in each of the convex portion and the concave portion, a curvature of the inner wall at the at least one of the first end portion and the second end portion is increased and decreased along the circumferential direction of the inner wall. - View Dependent Claims (16)
- a cabinet having an opening portion; and
Specification