An adjustment mechanism, including a first, second and third element pivotally connected to each other in series; locking mechanism to lock the respective elements in a selected position relative to each other; and a pushbutton actuating mechanism that releases the locking mechanism such that the elements are independently pivoted with respect to each other and release of the pushbutton actuating mechanism re-energizes the locking mechanism.

A smoothly adjustable artboard comprises: a base configured for fixing, an adjusting bracket configured to adjust the height and angle of the artboard, and a painting plate configured to place drawing paper, and the adjusting bracket is arranged between the base and the painting plate, wherein the adjusting bracket includes a connecting seat, a connecting bracket, a force applying mechanism, a cam member, a roller and a one-way limiting mechanism, the roller is rotatably arranged on the connecting bracket and is located at one end close to the base, and one end of the force applying mechanism is connected with the connecting seat, and the other end of the force applying mechanism is connected with the cam member, wherein a curved surface of the cam member is configured to press against the roller under the pushing action of the force applying mechanism.

A smoothly adjustable artboard comprises: a base configured for fixing, an adjusting bracket configured to adjust the height and angle of the artboard, and a painting plate configured to place drawing paper, and the adjusting bracket is arranged between the base and the painting plate, wherein the adjusting bracket includes a connecting seat, a connecting bracket, a force applying mechanism, a cam member, a roller and a one-way limiting mechanism, the roller is rotatably arranged on the connecting bracket and is located at one end close to the base, and one end of the force applying mechanism is connected with the connecting seat, and the other end of the force applying mechanism is connected with the cam member, wherein a curved surface of the cam member is configured to press against the roller under the pushing action of the force applying mechanism.

An easel apparatus may be converted between a table configuration with a horizontal work surface and an easel configuration with inclined work surfaces, wherein the apparatus has an unchanging footprint when adjusted between the easel and the table configurations.

An easel apparatus may be converted between a table configuration with a horizontal work surface and an easel configuration with inclined work surfaces, wherein the apparatus has an unchanging footprint when adjusted between the easel and the table configurations.

There is provided to a tilt board (1, 51, 61, 101) comprising an activity surface (3) supported by a base (5). The base comprises a front wall (7) and a rear wall (9) that extends downwardly from the activity surface by a greater distance than the front wall. The activity surface (3) comprises an activity surface surround (15) defining an aperture (17) therein and a removable activity surface insert (19) dimensioned for reception in the aperture. A plurality of interchangeable activity surface inserts (19) may be provided. The activity surface inserts (19) are also tilt adjustable relative to the remainder of the tilt board. The tilt board (1, 51, 61, 101) is provided with a circumferential flange so that the tilt board may be inserted into an aperture of a larger work surface such as a table if desired. The tilt board can be used for a range of activities, can lie flat in a larger work surface if desired, and the tilt angle can be adjusted to several angles which is highly advantageous.

A portable plans table configured to be used with a utility cart. The table top can be a non-fold table top, a mono-fold table top, or bi-fold table top that is large enough to support building plans, blueprints and the like. Each table top comprises leg members. The leg members can be panel leg members, a rotatable leg assembly, separate legs, or tubular folding legs. The embodiments of the plans table comprise various combinations of the different table tops and leg members. Each plans table embodiment can easily fold and be carried from one site to another.

A portable plans table configured to be used with a utility cart. The table top can be a non-fold table top, a mono-fold table top, or bi-fold table top that is large enough to support building plans, blueprints and the like. Each table top comprises leg members. The leg members can be panel leg members, a rotatable leg assembly, separate legs, or tubular folding legs. The embodiments of the plans table comprise various combinations of the different table tops and leg members. Each plans table embodiment can easily fold and be carried from one site to another.

A portable plans table configured to be used with a utility cart. The table top can be a non-fold table top, a mono-fold table top, or bi-fold table top that is large enough to support building plans, blueprints and the like. Each table top comprises leg members. The leg members can be panel leg members, a rotatable leg assembly, separate legs, or tubular folding legs. The embodiments of the plans table comprise various combinations of the different table tops and leg members. Each plans table embodiment can easily fold and be carried from one site to another.

A portable plans table configured to be used with a utility cart. The table top can be a non-fold table top, a mono-fold table top, or bi-fold table top that is large enough to support building plans, blueprints and the like. Each table top comprises leg members. The leg members can be panel leg members, a rotatable leg assembly, separate legs, or tubular folding legs. The embodiments of the plans table comprise various combinations of the different table tops and leg members. Each plans table embodiment can easily fold and be carried from one site to another.