| 摘要 |
The present invention relates to a height control device for a desk and a chair. A lower support rod of the height control device for a desk and a chair with a support leg is combined with an unlocking part. An upper support rod with a locking part inside the lower support part is combined to be slid. The unlocking part is combined with a female screw formed at the upper and lower parts of a through hole formed outside the lower support rod, is combined with a hinge piece having hinge holes at both upper sides of the lower female screw. A hinge piece with a hinge hole is combined with both upper sides of the lower female screw. A hinge pin formed at the lower part of an unlocking ring piece of the unlocking part is combined with the hinge hole. The inner side of an unlocking slide piece is combined to touch both sides of the through hole of the lower support rod as the unlocking ring piece is inserted into the unlocking slide piece. An unlocking cover is combined with the female screw by a bolt. One side of a spring is combined with a spring fixing piece formed inside the unlocking cover. The other side of the spring pressurizes the upper outer side of the unlocking ring piece. Therefore, the present invention allows a user to use a desk and a chair easily by adjusting the height suitable to the user, extends the lifetime of the desk and the chair, and prevents a part of the body or clothes from being scratched. |
