A socket mounted post system including a post with a hollow base portion attached to a spring mechanism. The spring mechanism includes a pillar, the pillar having a finger extending from the hollow base portion. The finger is engageable with a socket that is mountable in a floor. The spring mechanism allows the post to flex angularly relative to a vertical orientation of the post.

An example retractable bollard system for installation in a support surface that includes pavement is disclosed. The example bollard system includes a shell that when installed in the support surface extends below an upper surface of the pavement. The example bollard system includes a post to be telescopically coupled to the shell. The post is axially movable relative to the shell selectively to an upper area and a lower area. The post extends farther above the shell when the post is in the upper area than when the post is in the lower area. The example bollard system further includes a shock absorber to encircle the shell. The shock absorber is made of a polymeric material.

A kind of partition wall is introduced. The partition wall includes a housing, a roller wound with an inflatable wall body mounted inside the housing, and a shaft with a torsion spring mounted inside the roller. The inflatable wall body can be pulled out from the housing and can be rolled back to the housing by the torsion spring. The partition wall is rollable which offers people the chance to adjust their room space segmentation. It is also suitable for some small space such as a recreational vehicle or some mobile house. When people need to divide a bedroom from living room, they can expand out the partition wall.