Abstract: A height-adjustable table structure includes: a tabletop, a first support frame, a second support frame, a first spring, an adjustment unit, a linkage group, and a positioning member. The adjustment member is disposed to the top surface of the tabletop for the user to observe. When the adjustment member is driven to move, the locking member of the linkage group is moved from the locking position to the releasing position, so that the first and support frames are free to rotate. When the adjustment member is released, the locking member will be moved from the releasing position to the locking position, so as to maintain the adjusted height of the table structure. By such arrangements, during the height adjustment of the table structure, the user can clearly see the position of the adjustment member, leading to more intuitive use, achieving easy operation and improved safety.

Abstract: A height-adjustable desk structure includes a desktop, two adjustment members, two linkage sets, two positioning members, two sliding sets, two springs and two supporting stands, and the adjustment members penetrate the top surface of the desktop and can be viewed by the user directly. When the two adjustment members are actuated, the moving members move from a locked position to a released position in order to allow the two supporting stands to swing freely. When the two adjustment members are released, the moving members move from the released position to the locked position and then, is positioned inside the positioning recesses. Accordingly, the user is able to clearly see the locations of the adjustment members of the desk, thereby enabling easy and intuitive use and ensuring safety.

Abstract: A support frame includes: a base; a pivot block with a first pivot hole and a second pivot hole; a first strut having a first end portion and an opposite second end portion, wherein the first end portion is pivotally connected to the second pivot hole; an elastic member sleeved on the first strut; a hanging mount pivotally connected to the second end portion; and a second strut having one end pivotally connected to the base and another end pivotally connected to the hanging mount. The first sliding member and the second sliding member on the pivot block pivot on equal degrees, which solves the problem that the spring is overly stretched and easily gets fatigued, thereby improving the durability of the spring.

Abstract: A support frame includes: a base; a pivot block with a first pivot hole and a second pivot hole; a first strut having a first end portion and an opposite second end portion, wherein the first end portion is pivotally connected to the second pivot hole; an elastic member sleeved on the first strut; a hanging mount pivotally connected to the second end portion; and a second strut having one end pivotally connected to the base and another end pivotally connected to the hanging mount. The first sliding member and the second sliding member on the pivot block pivot on equal degrees, which solves the problem that the spring is overly stretched and easily gets fatigued, thereby improving the durability of the spring.

Abstract: A displacement structure for a support frame includes a fixing member and a slide member. The fixing member includes a first fixing portion, a connecting portion and a second fixing portion which are sequentially connected. The connecting portion has two ends connected to the first and second fixing portions, respectively, the first and second fixing portions are opposite to each other and separated by a clamping space which is provided for clamping a table plate. The slide member includes a first clamping portion fixed to one end of the stationary rod, and two opposite second clamping portions opposite to the first clamping portion. The first clamping portion and the second clamping portions are fixed together by a fixing bolt, there is a slide space between the first clamping portion and the second clamping portions, the first clamping portion and the second clamping portions clamp the first fixing portion.