| 摘要 |
An armrest assembly includes an armrest unit A and a support unit B. The armrest unit comprises an adjusting seat 2 received in a base 1 slideable in a length direction. The adjusting seat is slideable in a width direction relative to a seat 3 fixed to the support unit. A first control button 6 initially engaged with the adjusting seat can be operated to disengage from the teeth 28 disposed on the adjusting seat 2 and to disengage a toothed transverse positioning block 4 from the seat 3, allowing adjustment in the length and width directions. A lower rod 81 is fixed to a chair body and is received in an upper rod 82 movable in a height direction. A second control button 9 is mounted in a window 822 in the upper rod and includes engagement teeth (812, figure 2) engaged with a gear 833 on a screw rod 83 in threading connection with a screw rod coupling seat 812 on the lower rod. The second control button can be operated to disengage the engagement teeth from the gear, allowing adjustment in the height direction. |
