| 摘要 |
<p>Disclosed is a simple and convenient sofa expansion device, which belongs to the technical field of manufacturing sofas with a dual purpose of sitting and lying down to rest, and comprises a base (1) and an expansion bracket body (2) provided on the base (1), wherein the expansion bracket body (2) and the base (1) are movably linked by means of connecting rods; and the expansion bracket body (2) comprises a seat cushion support unit (22) located in the middle thereof, and a leg support unit (21) and a backrest support unit (23) respectively located in front of and behind the seat cushion support unit (22), the seat cushion support unit (22) being hinged with the leg support unit (21) and the backrest support unit (23) respectively. By adopting the sofa expansion device, the structure of the entire expansion device can be made even more simple but can still produce the same effect, so much so that when expanded, the device can fit with physiological curves better to make a person feel comfortable.</p> |
