SOFA BED WITH GLIDE SYSTEM
A sofa bed with three moving seat bases that transforms between a bed configuration and a sofa configuration. The sofa bed includes supporting legs and armrest. Each of the seat bases, and corresponding cushions, are located between the armrests. The seat bases are interconnected with a set of slide rails that allow the seat bases to move relative to one another. The sofa bed also includes a locking mechanism to hold the sofa bed in the sofa configuration.
1 . A sofa bed comprising:
a pair of armrests;
at least one first seat cushion disposed between the pair of armrests;
at least one first connector attached to each of the at least one first seat cushion;
at least one second seat cushion disposed between the pair of armrests;
at least one second connector attached to each of the at least one second seat cushion, wherein the at least one first connector and the at least one second connector form a hinge joint;
at least one third seat cushion disposed between the set of armrests;
a first seat base attached to the at least one first seat cushion;
a pair of stand bars supporting the first seat base;
a second seat base attached to the at least one second seat cushion;
a third seat base attached to the at least one third seat cushion, wherein the second seat base and the third seat base are connected in a hinge joint;
a pair of rotating shafts, each disposed in one of the armrests, wherein that third seat base is attached to rotating shafts opposite the hinge joint with the second seat base;
a pair of support legs configured to support the first seat base;
a pair of first slide rails, each attached to one of the pair of support legs;
a pair of first glide wheels, each connected to one of the first connectors, wherein each of the first slides is configured to receive the first glide wheel and allow it to roll along at least part of the length of the first slide;
a pair of second slide rails, each attached to one of the pair of armrests; and
a pair of second glide wheels, each of the second glide wheels connected to one of the support legs, wherein each of the second slides is configured to receive the second glide wheel and allow it to roll along at least part of the length of the second slide.
2 . The sofa bed of claim 1 , wherein first seat base has a side distal to the second seat base and a side proximal to the second seat base; and wherein the second seat base includes a protrusion opposite the second seat cushion and further comprising:
a pair of reinforcing rods, each with a first side and a second side, wherein the each of the first sides is attached to the corresponding distal side of the first seat base and each of the second sides is attached to the corresponding proximal side of the first seat base;
a pair of ratchet brackets, each comprising an L-shaped bar with a long side and short side and comprising indentations along the long side, the short side being attached to the reinforcing rod and the long side being attached to the proximal side of the first seat base;
a pair of locking rods, each with one end attached to the corresponding protrusion on the second seat base and the other end engaging the teeth of the ratchet bracket; and
a pair of slider stops, each surrounding a long side of one of the ratchet brackets and comprising a spring between the slider stop and the locking rod to apply force to maintain engagement between the teeth and the locking rod.
3 . The sofa bed of claim 1 , further comprising:
a support pad disposed on each of the first slides to support the second seat base and the third seat base.
4 . The sofa bed of claim 1 , further comprising:
a pair of first casters, each on one of the stand bars; and
a pair of second casters, each on one of the support legs.
5 . The sofa bed of claim 1 , wherein the third seat base comprises a pair of connection plates and each of the rotating shafts connects to the third seat base at one of the connection plates.
6 . The sofa bed of claim 1 , further comprising a clip attached to the first seat base and a strut or crossbar, wherein the clip is configured to connect to the strut and hold the sofa bed in a sofa position.
7 . A sofa bed comprising:
a pair of armrests;
at least one first seat cushion disposed between the pair of armrests;
at least one first connector attached to each of the at least one first seat cushion;
at least one second seat cushion disposed between the pair of armrests;
at least one second connector attached to each of the at least one second seat cushion, wherein the at least one first connector and the at least one second connector form a hinge joint;
at least one third seat cushion disposed between the set of armrests;
a first seat base attached to the at least one first seat cushion;
a pair of stand bars supporting the first seat base;
a second seat base attached to the at least one second seat cushion;
a third seat base attached to the at least one third seat cushion, wherein the second seat base and the third seat base are connected in a hinge joint;
a pair of rotating shafts, each disposed in one of the armrests, wherein that third seat base is attached to rotating shafts opposite the hinge joint with the second seat base;
a pair of support legs configured to support the first seat base;
a pair of first slide rails, each attached to one of the pair of support legs;
a pair of first glide wheels, each connected to one of the first connectors, wherein each of the first slides is configured to receive the first glide wheel and allow it to roll along at least part of the length of the first slide;
a pair of second slide rails, each attached to one of the pair of armrests; and
a pair of second glide wheels, each of the second glide wheels connected to one of the first slides, wherein each of the second slides is configured to receive the second glide wheel and allow it to roll along at least part of the length of the second slide.
8 . The sofa bed of claim 6 , wherein first seat base has a side distal to the second seat base and a side proximal to the second seat base; and wherein the second seat base includes a protrusion opposite the second seat cushion and further comprising:
a pair of reinforcing rods, each with a first side and a second side, wherein the each of the first sides is attached to the corresponding distal side of the first seat base and each of the second sides is attached to the corresponding proximal side of the first seat base;
a pair of ratchet brackets, each comprising an L-shaped bar with a long side and short side and comprising indentations along the long side, the short side being attached to the reinforcing rod and the long side being attached to the proximal side of the first seat base;
a pair of locking rods, each with one end attached to the corresponding protrusion on the second seat base and the other end engaging the teeth of the ratchet bracket; and
a pair of slider stops, each surrounding a long side of one of the ratchet brackets and comprising a spring between the slider stop and the locking rod to apply force to maintain engagement between the teeth and the locking rod.
9 . The sofa bed of claim 6 , further comprising:
a support pad disposed on each of the first slides to support the second seat base and the third seat base.
10 . The sofa bed of claim 6 , further comprising:
a pair of first casters, each on one of the stand bars; and
a pair of second casters, each on one of the support legs.
11 . The sofa bed of claim 6 , wherein the third seat base comprises a pair of connection plates and each of the rotating shafts connects to the third seat base at one of the connection plates.
12 . The sofa bed of claim 6 , further comprising a clip attached to the first seat base and a strut or crossbar, wherein the clip is configured to connect to the strut and hold the sofa bed in a sofa position.