Can lid

Abstract

A can lid includes a score line provided on an outer peripheral edge side of a disk-shaped panel portion; a rivet portion provided in the panel portion and adjacent to an inner side of the score line in a radial direction; a tab including an attachment portion including a rivet hole to be attached to the rivet portion, a tip portion continuous with the attachment portion, and a finger hook portion formed on a side opposite to the tip portion across the attachment portion; and an auxiliary score line formed in the panel portion and including a first part and a second part, the first part extending in an arc shape on an inner side of the rivet portion in a radial direction of the panel portion, the second part being continuous with the first part.

What is claimed is: 
     
         1 . A can lid comprising:
 a disk-shaped panel portion;   a score line provided on an outer peripheral edge side of the panel portion;   a rivet portion provided in the panel portion and adjacent to an inner side of the score line in a radial direction;   a tab including an attachment portion including a rivet hole to be attached to the rivet portion, a tip portion continuous with the attachment portion, and a finger hook portion formed on a side opposite to the tip portion across the attachment portion; and   an auxiliary score line formed in the panel portion and including a first part and a second part, the first part extending in an arc shape along the rivet portion on an inner side of the rivet portion in a radial direction of the panel portion, the second part being continuous with the first part, wherein if a straight line passing through a center of the rivet portion and a tip of the tab is a first straight line and a straight line passing through the center of the rivet portion and orthogonal to the first straight line is a second straight line, the second part extends in a direction along the second straight line and is located on a center side of the panel portion with respect to the second straight line.   
     
     
         2 . The can lid according to  claim 1 , wherein a distance between the second part and the second straight line in an extending direction of the first straight line is set within a range of 0.2 to 2 mm.