A height adjustable desk including a desktop which engages with a pair of base supports by a pair of X-shaped frames and is adjustable between a fully raised position and a fully lowered position. The pair of X-shaped frames each has a first arm and a second arm. The pair of base supports each has a first biasing member which is configured to bias the corresponding second arm upwards to move the desktop towards the fully raised position, and a second biasing member which is configured to bias the corresponding first arm upwards to move the desktop towards the fully raised position. A pair of height adjustment members is provided on an underside of the desktop, each of which includes a handle, a guiding member, a connecting piece connected to the handle via a linkage mechanism and a biasing member.

A convertible sit-to-stand desk has a desktop that is manually movable into and between a lowered position and a raised position, a base that is configured to support the desktop with respect to a supporting surface, and a supporting frame that supports the desktop with respect to the base. The supporting frame facilitates movement of the desktop into and between the lowered and raised positions. The supporting frame comprises first and second sub-frame assemblies disposed on opposite sides of the desktop, respectively.

A convertible sit-to-stand desk has a desktop that is manually movable into and between a lowered position and a raised position, a base that is configured to support the desktop with respect to a supporting surface, and a supporting frame that supports the desktop with respect to the base. The supporting frame facilitates movement of the desktop into and between the lowered and raised positions. The supporting frame comprises first and second sub-frame assemblies disposed on opposite sides of the desktop, respectively.

A lifting desktop comprises a desktop platform, a base frame below the desktop platform, and two sets of assemblies. Each set of assemblies include a support frame assembly, an assistance assembly and a locking assembly. The two sets of assemblies are symmetrically arranged on two sides between the base frame and the desktop platform. The base frame comprises lower side-plates, and the desktop platform comprises upper side-plates. Each of the support frame assemblies comprises two support legs which are pivoted to each other in scissors by a central pivot and spanned on two sides of the respective lower side-plate. Each of the support legs has a fixed pivot end pivoted to the respective lower side-plate or upper side-plate and a free end movably connected to the opposite upper side-plate or lower side-plate on the same side.

A lifting desktop comprises a desktop platform, a base frame below the desktop platform, and two sets of assemblies. Each set of assemblies include a support frame assembly, an assistance assembly and a locking assembly. The two sets of assemblies are symmetrically arranged on two sides between the base frame and the desktop platform. The base frame comprises lower side-plates, and the desktop platform comprises upper side-plates. Each of the support frame assemblies comprises two support legs which are pivoted to each other in scissors by a central pivot and spanned on two sides of the respective lower side-plate. Each of the support legs has a fixed pivot end pivoted to the respective lower side-plate or upper side-plate and a free end movably connected to the opposite upper side-plate or lower side-plate on the same side.

An adjustable height workspace includes a base forming a bottom surface, a first handlebar mount on the bottom surface, a second handlebar mount on the bottom surface spaced from the first handlebar mount, a work surface platform, and a height adjustment mechanism connecting the work surface platform and the base. The height adjustment mechanism includes a set of pivot arms that connect at a scissoring pivot point creating a scissoring motion when raising and lowering the work surface platform to various heights, a base pivot point fixed relative to the base and connecting the first pivot arm to the base, a platform pivot point fixed relative to the work surface platform and connecting the second pivot arm to the work surface platform, a first sliding mechanism between a the first pivot arm and the work surface platform, and a second sliding mechanism between the second pivot arm and the base.

An adjustable height workspace includes a base forming a bottom surface, a first handlebar mount on the bottom surface, a second handlebar mount on the bottom surface spaced from the first handlebar mount, a work surface platform, and a height adjustment mechanism connecting the work surface platform and the base. The height adjustment mechanism includes a set of pivot arms that connect at a scissoring pivot point creating a scissoring motion when raising and lowering the work surface platform to various heights, a base pivot point fixed relative to the base and connecting the first pivot arm to the base, a platform pivot point fixed relative to the work surface platform and connecting the second pivot arm to the work surface platform, a first sliding mechanism between a the first pivot arm and the work surface platform, and a second sliding mechanism between the second pivot arm and the base.

A desk within a work surface or table such that the desk can be raised and lowered to any desired position in relation to the work surface using an actuator that controls the use of telescoping legs or rods. During the process of returning the desk back to its original flush, or in horizontal seamless alignment with, the rest of the work surface, a knee action safety device co-acts, or in combination, with a gas spring is used for controlling the lowering of the desk and creating a virtually weightless of desk during final descent; thus, eliminating the possibility of a person's limb or hand being crushed or severely injured, even if these are providing obstruction

A desk within a work surface or table such that the desk can be raised and lowered to any desired position in relation to the work surface using an actuator that controls the use of telescoping legs or rods. During the process of returning the desk back to its original flush, or in horizontal seamless alignment with, the rest of the work surface, a knee action safety device co-acts, or in combination, with a gas spring is used for controlling the lowering of the desk and creating a virtually weightless of desk during final descent; thus, eliminating the possibility of a person's limb or hand being crushed or severely injured, even if these are providing obstruction

A lifting mechanism for desk including a first bracket, a second bracket, and at least one lever assembly is provided. The first bracket includes a first plane. The second bracket includes a second plane. The lever assembly is connected between the first bracket and the second bracket so that the first bracket moves close to or moves away from the second bracket through the lever assembly, and the first plane is tilted relative to the second plane when the first bracket is away from the second bracket. The lever assembly includes at least two levers, and lengths of the at least two levers are different.