초록 ▼

A power cord which prevents breakage of a plug or cord/conductors even when treated roughly, and thus has a longer life. The power cord includes a plurality of cores of a synthetic resin, each for covering a connection section of a single blade among a plurality of blades, and an outer skin of a syn

A power cord which prevents breakage of a plug or cord/conductors even when treated roughly, and thus has a longer life. The power cord includes a plurality of cores of a synthetic resin, each for covering a connection section of a single blade among a plurality of blades, and an outer skin of a synthetic resin, for covering the plurality of cores together such that the blades are held at a specified interval spacing so as to form a plug. The synthetic resin forming the outer skin is softer than the synthetic resin forming the cores. The outer skin includes a thicker part for covering a border part of each cord having an internal covering member between a part covered with the core and a part exposed from the core.

대표청구항 ▼

The invention claimed is: 1. A power cord, comprising: a plurality of blades each including an outlet insertion part at a leading end thereof and a connection section at a trailing end thereof, the connection section being connected to a plurality of conductors exposed from a leading end of a corre

The invention claimed is: 1. A power cord, comprising: a plurality of blades each including an outlet insertion part at a leading end thereof and a connection section at a trailing end thereof, the connection section being connected to a plurality of conductors exposed from a leading end of a corresponding cord among a plurality of cords; a plurality of cores each for covering the connection section of a single corresponding blade of the plurality of blades, the cores being formed of a synthetic resin; and an outer skin for covering the plurality of cores together such that the plurality of blades are held at a specified interval spacing, so as to form a plug, the outer skin being formed of a synthetic resin; wherein: the synthetic resin forming the outer skin is softer than the synthetic resin forming the cores; the outer skin includes a thicker part for covering a border part of each cord between a part covered with the core and a part exposed from the core; a separate core of the plurality of cores is provided for each blade of the plurality of blades; the plurality of cores are completely covered by the outer skin; trailing end surfaces of the cores are aligned to the same plane as each other; and the thicker part of the outer skin is aligned to the same plane as the trailing end surfaces of the cores. 2. A power cord of claim 1, wherein the cores hold leading ends of the cords as directed to be separated from each other, and hold the blades so as to be parallel to each other. 3. A power cord of claim 2, wherein the cores each include a trailing end part and a leading end part, and the trailing end parts of the cores are angled relative to each other as directed to be separated from each other whereas the leading end parts of the cores are parallel to each other. 4. A power cord of claim 1, wherein the outer skin includes a constricted part at a position closer to a leading end of the outer skin than the thicker part, the constricted part being thinner than the thicker part and covering an outer circumferential surface of the cores. 5. A power cord of claim 4, wherein the constricted part is formed to be recessed from the thicker part in a curve in the shape of a portion of a circle or an ellipse. 6. A power cord of claim 1, wherein the outer skin includes a tapering part at a position closer to a trailing end of the outer skin than the thicker part, the tapering part continuously extending from the thicker part and becoming gradually thinner. 7. A power cord of claim 1, wherein the blades each have a wider part in a trailing end part thereof which is wider than a leading end part thereof. 8. A power cord of claim 7, wherein the wider part has a continuous flat surface. 9. A power cord of claim 7, wherein: the connection section includes a crimping section and a joint section; the crimping section pressure-contacts the conductors to the trailing end of the blade; and the joint section joints the conductors to the wider part by welding. 10. A power cord of claim 9, wherein the cores each have a thicker part, which is thicker than the remaining part thereof, for covering the wider part of the blade. 11. A power cord of claim 1, wherein: a single cord among the plurality of cords is provided for each blade; and the plurality of cords are covered together with a common external covering member in the state where a buffering member is interposed between plurality of cords and the common external covering member. 12. A power cord of claim 1, wherein the synthetic resin forming the cores is 66 nylon, and the synthetic resin forming the outer skin is polyvinyl chloride. 13. A power cord, comprising: a plurality of blades each including an outlet insertion part at a leading end thereof and a connector at a trailing end thereof, the connector being connected to a plurality of conductors exposed from a leading end of a corresponding cord among a plurality of cords; a plurality of cores each for covering the connector of a single corresponding blade of the plurality of blades, the cores being formed of a synthetic resin; and an outer skin for covering the plurality of cores together such that the plurality of blades are held at a specified interval spacing, so as to form a plug, the outer skin being formed of a synthetic resin; wherein a separate core of the plurality of cores is provided for each blade of the plurality of blades; the plurality of cores are completely covered by the outer skin; the blades each have a wider part in a trailing end part thereof, which is wider than a leading end part thereof; and the connection section includes a crimping section and a joint section, the crimping section pressure-contacts the conductors to the trailing end of the blade, and the joint section joints the conductors to the wider part by welding; wherein trailing end surfaces of the cores are aligned to the same plane as each other; and the thicker part of the outer skin is aligned to the same plane as the trailing end surfaces of the cores.