| 摘要 |
The present invention relates to a height-adjustable chair, mainly comprising a first post, a second post, a lock clamp, a seat and a seatback. The first post is of a section of sleeve tube with a tripod mount for the chair to stand on the ground. The second post is also a section of sleeve tube permissible to rise and lower in the first post with a pivot brace and a plurality of support rods for holding the seat and the seatback of the chair. The second post is permitted to slide in and out freely in the first post. A quick-action lock clamp is fixed between the first post and second post, convenient for the operator to easily press the lock wrench for rising or lower the second post within the first post and adjust the height of the chair as it suits his gesture.
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