MULTISTAGE ADJUSTER STRUCTURE

PROBLEM TO BE SOLVED: To secure a storage space inside a cabinet, having an axis member which is prevented from falling out, and to control the axial dimension to a minimum, when a multistage adjuster is contracted. SOLUTION: This triple-stage adjuster 20 is mounted on the under side of a cabinet, comprises an axial member 21 and an axial member 22 threadably attached inside the axial member 22 and a support part 29 respectively for being capable of moving along their axes, and is retractable by relative movement among the axial members 21, 22 and 29. In this case, female screw parts 24 and 27 which are formed inside the axial members 22 and 29 comprise regions 25 and 28 where the axial members 21 and 22 protruded from inside the axial members 22 and 29 stop halfway when the adjuster 20 is expanded, and the axial members 21 and 22 are respectively stored integrally inside the support part 29 which is an outermost axial member put in the most outer side, when the adjuster 20 is contracted.