A bed is a piece of furniture used as a place to sleep or relax. It has a secondary use as a place to engage in sexual relations.
Most modern beds consist of a soft mattress on a bed frame, with the mattress resting either on a solid base, often wood slats, or a sprung base. Many beds include a box spring inner-sprung base, a large mattress-sized box containing wood and springs that provide additional support and suspension for the mattress. Beds are available in many sizes, ranging from infant-sized bassinets and cribs, small beds for a single child or adult, to large queen and king-size beds designed for two adults. While most beds are single mattresses on a fixed frame, there are other varieties, such as the murphy bed, which folds into a wall, the sofa bed, which folds out of a sofa, and the bunk bed, which provides two mattresses on two tiers. Temporary beds include the inflatable air mattress and the folding camp cot. Some beds contain neither a padded mattress nor a bed frame, such as the hammock.
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A sofa bed or sofa-bed, (in the US often sofabed, hide-a-bed, bed-couch or sleeper-sofa), typically is a sofa or couch which has underneath its seating cushions a metal frame and thin mattress that can be unfolded or opened up to make a bed. A futon differs from a sofabed, although sofa beds using futon mattresses are common.
Sofa beds can be found not just in many styles, but many sizes as well. They are categorized accordingly, from Chair Sleepers (cot size bed) to Queen Sleepers. Almost all sofa beds contain the standard bar and canvas mechanism seen for years, however a few new lines can be found with alternative mechanisms.
Sofa beds are usually three-person couches. However sofa beds that are two-person couches are also available. These types of sofa beds are known as loveseat sleepers. They are known as loveseats since the smaller size means one needs to be comfortable with how close they will be to the person next to them.
Furniture is the mass noun for the movable objects intended to support various human activities such as seating (e.g., chairs, stools, tables and sofas) and sleeping (e.g., beds). Furniture is also used to hold objects at a convenient height for work (as horizontal surfaces above the ground, such as tables and desks), or to store things (e.g., cupboards and shelves). Furniture can be a product of design and is considered a form of decorative art. In addition to furniture's functional role, it can serve a symbolic or religious purpose. It can be made from many materials, including metal, plastic, and wood. Furniture can be made using a variety of woodworking joints which often reflect the local culture.
