| 摘要 |
<p>PURPOSE: An antenna is provided to minimize damage to a rod unit by minimize the friction force generated between the rod and a bushing spring which is made with metal and has a small elastic force. CONSTITUTION: An antenna comprises a rod unit(10), bushing springs(20), and supplementary elastic members(30). The rod unit comprises a first rod(110), a second rod(120), and a third rod(130). The bushing springs are inserted into the first rod and the second rod except the third rod which is the shortest in diameter. The bushing spring inserted into the first rod provides elasticity to the direction of the second rod. The bushing spring inserted into the second rod provides elasticity to the direction of the third rod. The secondary elastic members are come insides of the rods except the second rod, and provide elasticity along with the bushing springs to the direction of sliding movements of rods.</p> |
