Extendable table

An extendable table, comprising:

• two extension tubes each having an outer tube and two inner tubes, a gear wheel being provided at a middle part of the outer tube, a gear rack provided at on a wall of each of the two inner tubes, the two inner tubes being arranged abreast in the outer tube so that the gear racks engage with the gear wheel, and the two extension tubes being arranged in parallel;
• two connection tubes each having two opposite ends thereof connected to the outer tube of the corresponding extension tube, so as to form a frame;
• four legs being fixed to the frame from below;
• a fixed board being fixed on the two outer tubes;
• four moving components each being pivotally connected to an outer end of the corresponding inner tubes;
• two movable boards each having one side fixed to two moving components on the corresponding two inner tubes of the two extension tubes, so that a free side of the movable board is pivotally liftable against the two moving components, wherein when the two extension tubes are retracted, the two movable boards are laid on the fixed board and jointly form a tabletop, with the fixed board located right below the two movable boards, and when the two extension tubes are extended, the two movable boards are laid on the two corresponding inner tubes of the two extension tubes and work with the fixed board as a tabletop;
• and
• each said inner tube being provided with a lifting member for lifting the free side of the corresponding movable board, so as to allow the free side to pass over an edge of the fixed board and be laid on the fixed board;
• wherein the fixed board has a length smaller than a length of each of the two outer tubes, so that a projecting segment is formed on each of the two outer tubes and the two projecting segments jutting out two opposite sides of the fixed board, each of the projecting segments having a lengthwise through hole near the fixed board, the lifting member having one end pivotally connected in the inner tube, the inner tube having a through hole positionally corresponding to the lifting member that allows an opposite end of the lifting member to be normally biased by a spring and exposed outside the inner tube for lifting the movable board, the opposite end of the lifting member when pushed being retracted into the inner tube, the opposite end of the lifting member being formed as a pointy tip and having an inclined plane, so that when the inner tube is pull outward, the tip of the lifting member contacts a wall of the through hole of the outer tube and the inclined plane works with the wall to guide the lifting member to project to lift the free side of the movable board;
• wherein the moving component is a toggle component that comprises a first toggle and a second toggle, the first toggle having one end pivotally connected in the outer end of the inner tube, the second toggle having one end pivotally connected to an opposite end of the first toggle, and the second toggle having an opposite end exposed outside the inner tube and having a flat segment for the movable board to be fixed thereon.