Pulp-molded packaging article

Abstract

A pulp-molded packaging article is introduced herein, which comprises a bottom wall, and a standing lateral wall having a bulge region and a groove region. A transversely cross-sectional thickness located at the bulge region is larger than a transversely cross-sectional thickness located at the groove region. While a to-be-packaged object enters inside the article to oppress the bulge region, the bulge region is therefore actuated in elastic deformation to reach an outwardly deflected position. And then, after the to-be-packaged object continues to reach the groove region, the bulge region is rebounded therefore to exert reverse elastic forces on the to-be-packaged object, resulting in a snap-in retention onto the to-be-packaged object, which makes the snap-in convex surface stopping the to-be-packaged object from moving toward a top opening of the article.

What is claimed is: 
     
         1 . A pulp-molded packaging article, integrally formed by a wet fiber pulp-molding process, for carrying a to-be-packaged object thereon, comprising:
 a horizontal bottom wall; and   a standing lateral wall, integrally and upwardly extended from and around an outermost periphery of the horizontal bottom wall, wherein the standing lateral wall is formed with an inner sidewall and an outer sidewall located opposite to the inner sidewall, the standing lateral wall is formed with transversely cross-sectional thicknesses between the inner sidewall and the outer sidewall, an accommodation space is defined commonly by between the horizontal bottom wall and the standing lateral wall, for accommodating the to-be-packaged object therein, and a top opening communicated with the accommodation space is formed adjacent to a top of the standing lateral wall, for providing entry or exit of the to-be-packaged object; wherein
 the standing lateral wall comprises a bulge region located beneath the top opening, and a groove region located beneath the bulge region, both the bulge region and the groove region are integrally formed side-by-side along a direction in which the standing lateral wall is upwardly extended, the bulge region is formed with a snap-in convex surface which is protruded from the inner sidewall toward the accommodation space, and the groove region is formed with a concave surface which is concaved from the inner sidewall toward the outer sidewall, wherein the transversely cross-sectional thickness located at the bulge region is larger than the transversely cross-sectional thickness located at the groove region, and while the to-be-packaged object enters into the accommodation space to oppress the snap-in convex surface, the bulge region is therefore actuated in elastic deformation to reach an outwardly deflected position, and after the to-be-packaged object continues to pass through beside the snap-in convex surface to reach the concave surface of the groove region, the bulge region is rebounded therefore to exert reverse elastic forces on the to-be-packaged object, resulting in a snap-in retention onto the to-be-packaged object, which makes the snap-in convex surface stopping the to-be-packaged object from moving toward the top opening. 
   
     
     
         2 . The pulp-molded packaging article according to  claim 1 , wherein the bulge region and the groove region both located on the outer sidewall are revealed in a successively-flat curve surface formed along the upwardly-extended direction. 
     
     
         3 . The pulp-molded packaging article according to  claim 1 , wherein an inner contour of the inner sidewall conforms with an outer contour of the to-be-packaged object. 
     
     
         4 . The pulp-molded packaging article according to  claim 1 , wherein an upper of the bulge region has a guiding inclined curved plane formed on the inner sidewall, which is used to direct the to-be-packaged object into the accommodation space by an inclined plane principle. 
     
     
         5 . The pulp-molded packaging article according to  claim 1 , wherein the snap-in convex surface of the bulge region is formed in a shape of a snap-in annular bar along an inner circumferential direction of the inner sidewall, and the concave surface of the groove region is formed in a shape of a snap-in annular recess along the inner circumferential direction of the inner sidewall. 
     
     
         6 . The pulp-molded packaging article according to  claim 1 , wherein the transversely cross-sectional thickness located at the bulge region is larger than the transversely cross-sectional thickness of the other portions of the standing lateral wall. 
     
     
         7 . The pulp-molded packaging article according to  claim 1 , wherein a draft direction of the bulge region has a negative draft angle relative to a longitudinal draft direction of the inner sidewall of the standing lateral wall. 
     
     
         8 . The pulp-molded packaging article according to  claim 1 , wherein the concave surface is integrally connected side-by-side with the snap-in convex surface along the upwardly-extended direction of the standing lateral wall.