Movable platform assembly with translation system

1. A movable platform assembly for a boat, comprising:

a support structure configured to be connected to the boat,

a platform, and

a horizontal translation system connecting the platform to the support structure, said horizontal translation system comprising a pair of main arms rotatable about respective vertical rotation axes (x), and a pair of main sliders slidable in transverse direction along a main guide fixed to the platform, wherein each main arm comprises a proximal end hinged to the support structure and a distal end hinged to a respective main slider, and wherein the platform is translationally movable between a retracted position and an extended position relative to the support structure.

2. The movable platform assembly of claim 1 , wherein said vertical rotation axes are arranged at a fixed distance from each other, said distance being smaller than or equal to a width of the platform, and wherein said main arms are mirror-wise rotatable in opposite directions relative to each other.

3. The movable platform assembly of claim 1 , wherein the horizontal translation system further comprises at least one pair of secondary arms rotating about respective secondary rotation axes (x 1 , x 2 ) parallel to the vertical rotation axes (x) and respectively hinged to secondary sliders slidable in transverse direction along a secondary guide fixed to the platform and parallel to the main guide.

4. The movable platform assembly of claim 1 , wherein the support structure comprises at least one upright and at least one support that carries the horizontal translation system and is vertically slidable in a guided manner along the at least one upright, wherein the platform in the extended position is translationally movable in vertical direction between a raised position and a lowered position, the platform being alignable in the lowered position with a walking surface of the boat.

5. The movable platform assembly of claim 1 , further comprising:

a base structure configured to be fixed to the boat, and

a vertical translation system connecting the support structure to the base structure, wherein the support structure with the platform in the extended position is translationally movable in vertical direction between a raised position and a lowered position.

6. The movable platform assembly of claim 1 , further comprising:

a base structure configured to be fixed to the boat, and

an articulated quadrilateral or parallelogram movement system connecting the support structure to the base structure.

7. The movable platform assembly of claim 6 , wherein the movement system is an articulated parallelogram movement system, and wherein the support structure with the platform in the extended position is movable between a first position, in which the articulated parallelogram movement system is horizontally oriented, and a plurality of second positions, in which the articulated parallelogram movement system is tilted.

8. The movable platform assembly of claim 7 , wherein a plurality of steps is articulated to the articulated parallelogram movement system, and wherein in said first position the steps of said plurality of steps are arranged at a same height and cooperate to define a walking surface.

9. The movable platform assembly of claim 8 , wherein the support structure comprises at least one upright and at least one support that carries the horizontal translation system and is vertically slidable in a guided manner along the at least one upright, wherein the platform in the extended position is translationally movable in vertical direction between a raised position and a lowered position, and wherein in said lowered position the platform is aligned with the walking surface defined by the steps.

10. The movable platform assembly of claim 7 , wherein in one of said second positions the platform is alignable with a deck of the boat positioned at a greater height than said base structure.