Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C1/00—Chairs adapted for special purposes
  • A47C1/02—Reclining or easy chairs
  • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
  • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable parts
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C17/00—Sofas; Couches; Beds
  • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
  • A47C17/13—Seating furniture having non-movable backrest changeable to beds by increasing the available seat part, e.g. by drawing seat cushion forward
  • A47C17/136—Seating furniture having non-movable backrest changeable to beds by increasing the available seat part, e.g. by drawing seat cushion forward with a single seat cushion

Definitions

• the object of this specification is a sofa base pull-out system, which is particularly applicable for increasing the depth of the seat without any joint therein and which works by means of a system of semi-rigid bands that allow the mattress to be retracted when it is closed and held in place when it is opened. It also avoids the use of mechanical guide systems that are prone to making noise and breaking with use.
• pull-out sofas which are sofas or modular sofas in which the seat slides forward in a straight line. This mechanism allows the depth of the seat to be increased, which is particularly useful in compact spaces, as it offers the possibility of maximising comfort without taking up excessive space when the sofa is not in use.
• Pull-out sofas typically have an initial seat depth of between 105 and 110 cm in their standard configuration; however, by sliding the seat forward, this depth can be increased significantly, allowing users to stretch their legs almost completely.
• the extension of the seat will always be limited by the maximum depth of the backrest, which is usually a maximum of 45 centimetres, which may not be sufficient for an adult to fully extend their legs in a fully horizontal position.
• This limitation can be a drawback depending on the user's height or the specific use of the sofa, such as sleeping or relaxing for extended periods of time.
• some models of pull-out sofas have incorporated a design in which the additional depth is provided by a rear cushion concealed under the seat. This cushion is deployed when the sofa is extended, thereby increasing the depth of the seat but creating an aesthetic problem by leaving an additional extension visible, which is visually unattractive to the user and reduces comfort due to the joining of the two seat cushions.
• the technical problem solved by the present invention is to increase the depth of the seat beyond the standard depth of the backrest, which is normally a maximum of 45 centimetres.
• the sofa base pull-out system of the present invention allows the seat to be folded 90° into the backrest, without creating divisions in the seat, thus giving the appearance of a one-piece cushion.
• This system allows a pull-out depth of between 60 and 70 centimetres to be achieved, starting from a closed seat depth of less than 99 centimetres. This is achieved by means of a mechanical mechanism that does not use bearings, thus eliminating the propensity for breakdowns that often occur with frequent use, such as sitting or jumping on the sofa.
• the design of the system also includes a rear elastic webbing suspension, which ensures uniform comfort when sitting, avoiding differences in comfort during prolonged use. Furthermore, its sturdy construction prevents possible breakage and makes it ideal for sofas with a reduced depth of less than 100 centimetres.
• the design improves the extension of the base with respect to what is known in the state of the art, as well as the integrity of the design in one piece by means of a concealed and protected mechanism.
• This invention may be embodied in one unit, or in sets of two, three or more units joined together.
• the sofa base pull-out system is mainly made up of the following elements: a sliding seat (1), designed to maintain a continuous and seamless appearance when extended or retracted; a mattress (2), divided into two pieces, which is split in the rear portion to allow for deployment; a suspension system (3) located under the mattress (2), which allows it to support the user's weight and any additional movement or pressure; a deployment mechanism (4) that is activated by sliding the seat, allowing the mattress (2) to be deployed backwards and forwards, increasing the depth of the sofa; and a backrest (10) that houses the mattress (2) when it is rolled up and stored.
• a sliding seat (1) designed to maintain a continuous and seamless appearance when extended or retracted
• a mattress (2) divided into two pieces, which is split in the rear portion to allow for deployment
• a suspension system (3) located under the mattress (2), which allows it to support the user's weight and any additional movement or pressure
• a deployment mechanism (4) that is activated by sliding the seat, allowing the mattress (2) to be deployed backwards and forwards, increasing the
• the upper piece of the mattress (2) is longer and is equipped with webbing straps that are attached to the lower front portion of the backrest (10). These webbing straps are tensioned when the seat is fully extended, which prevents the upper portion of the mattress from shifting or falling, ensuring optimal comfort for the user. When the seat is folded back, the webbing straps force the tip of the upper mat to rotate by approximately 9 degrees, guiding it upwards to be housed in the backrest (10).
• the sofa base pull-out system has several important advantages: integrated movement of the sliding seat (1), which moves as one continuous piece, without the need to remove the backrest or add external pieces, offering a sleeker appearance and easier handling.
• the concealment of the mattress (2) in the backrest (10) contributes to maintaining the clean design of the sofa and reduces the risk of visible damage or wear.
• the stability of the base is reinforced by the tensioned webbing straps, which allows the seat (1) to remain stable even without direct support underneath, which is an innovative feature in sliding seat systems.
• the deployment mechanism (4) allows the mattress (2) to be extended to increase the depth of the sofa by an additional 60 to 80 centimetres in relation to the folded seat size.
• the securing webbing straps of the mattress (2) arranged across the width of the seat cushion (varying from two to eight webbing straps depending on the width of the seat), facilitate the folding of the upper section of the mattress (2) during retraction of the seat (1), thus eliminating the need for complex and failure-prone gear mechanisms.
• the webbing straps strategically positioned a few centimetres above the top line of the mattress, are tensioned in a rearward and upward direction, creating the appearance of a continuous cushion from the base of the seat to the floor.
• this visible section of the mattress corresponds to a strip that is only 8 to 10 centimetres thick, a visual perception of continuity and a level of comfort similar to that of a full mattress is achieved.
• This arrangement makes it possible to simulate a deep chaise longue-type seat without requiring the addition of visible rear cushions, maintaining aesthetic integrity and comfort, and making it possible to reduce the overall depth of the seat to less than 100 centimetres as required.

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• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Nursing (AREA)
• Dentistry (AREA)
• Mattresses And Other Support Structures For Chairs And Beds (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

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Family Applications (1)

Country Status (1)

Citations (3)

• 2025
  • 2025-03-27 EP EP25382291.0A patent/EP4635369A1/fr active Pending

Patent Citations (3)

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