(57) Mechanism for a sofa-bed enabling the adjustment in three positions comprising padding
elements supported by two frames; said frames can reciprocally move by means of two
angle-bars, concurrent in a point; one of said angle-bars 1 supports the frame forming
the seat of the sofa-bed and the second one 2 supports the frame forming the back
of the sofa-bed; moreover comprising a kinematism which supports said second angle-bar.
The mechanism is characterised in that the angle-bars, without interposition of additional
elements, constitute a release mechanism enabling the three positions; having the
first angle-bar 1 a shaped profile 4, connected to a pawl 7 at two different points
4' and 4'', and having the second angle-bar a toothed profile 3 enabling a cam 9,
fixed to said first angle-bar 1, to engage said toothed profile 3; in this way, the
relative position among the two angle-bars is well determined both for "divan" and
"relax".
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