Patent ID: 8167447

Claim:
An adjustable desk lamp, comprising: at least two buttons; a lamp panel; a stand comprising at least two first button housings and at least two first guide holes, wherein each of the first button housings communicates with one of the first guide holes; each of the first button housings receives one of the buttons; and each of the first button housings is filled with liquid; and a support arm assembly attached to the stand and supporting the lamp panel, wherein the support arm assembly comprises at least two channels and at least two support posts, each of the channels communicates with one of the first guide holes and is filled with liquid; one end of each of the support posts is received in one of the channels, and another end of each of the support posts supports the lamp panel; wherein when one of the buttons is pulled or pressed, the liquid in the button hole receiving the pulled or pressed button and the channel communicating with the button hole is displaced, and the support post received in the channel moves downwardly or upwardly due to the displacement of the liquid, thus the lamp panel casts light at a different angle due to the movement of the support post.