Synthetic resin container

Abstract

A synthetic resin container in a bottle shape including a mouth as a dispensing spout for a content medium, a trunk extending contiguous to the mouth via a shoulder, and a bottom closing a lower end of the trunk, in which: the trunk is provided with a reduced pressure absorbing portion having a plurality of reduced pressure absorbing recesses arranged side by side in the circumferential direction, and the reduced pressure absorbing portion is formed in a barrel shape having an intermediate part diameter at an intermediate part in the vertical direction larger than an end diameter at either one of ends in the vertical direction.

1 . A synthetic resin container in a bottle shape comprising a mouth as a dispensing spout for a content medium, a trunk extending contiguous to the mouth via a shoulder, and a bottom closing a lower end of the trunk, wherein:
 the trunk is provided with a reduced pressure absorbing portion having a plurality of reduced pressure absorbing recesses arranged side by side in the circumferential direction, and   the reduced pressure absorbing portion is formed in a barrel shape larger in diameter at an intermediate part in the vertical direction than at both ends in the vertical direction.   
     
     
         2 . The synthetic resin container according to  claim 1 , wherein the plurality of the reduced pressure absorbing recesses are each formed as a groove extending in the vertical direction while twisting in the circumferential direction about the axis of the reduced pressure absorbing portion. 
     
     
         3 . The synthetic resin container according to  claim 2 , wherein the plurality of the reduced pressure absorbing recesses each being larger in circumferential width at an intermediate part in the longitudinal direction than at the both ends in the longitudinal direction.