Spring elements and spring supported mat for backrest of car seat, comprise transversal connecting wires guided across rear of mat

摘要

The unit is assembled of a rectangular mat (3) made of pressed felt and several spring elements (1). Each of the spring elements (1) comprises two helical springs (4) fitted with hooks (5) at their outer ends (11) located at the sides and a straight wire section (2) connecting the springs (4). The wire (2) is guided across the rear of the mat (3). In other versions vertical wires or zigzag wires are positioned across the mat (3).