Locking member and device

An arrangement holding a first element with respect to a second element, comprising

• a locking member comprising a head, one end opposite said head and an intermediate portion able to be deformed resiliently in a longitudinal direction of said member and made in a single piece with said head and said end, said intermediate portion being formed by a longitudinal bar which, transversely, has smaller external dimensions than said head and said opposite end,
• said head having, in a distal portion, a truncated end with a section decreasing in diameter in the direction away from said intermediate portion,
• said arrangement comprising a hole opening out in a surface of said first element and in which is arranged said locking member,
• said arrangement further comprising a recess provided in a surface of said second element facing said surface of said first element,
• wherein said locking member is able to be compressed into said hole to allow a translation movement of said second element with respect to said first element in a direction substantially transverse to said longitudinal direction to a point when said recess faces said hole, at which point said locking member relaxes so that said distal portion penetrates into said recess.