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CN-122004618-A - Support expansion bracket structure for sofa bed

CN122004618ACN 122004618 ACN122004618 ACN 122004618ACN-122004618-A

Abstract

The invention discloses a support telescopic frame structure for a sofa bed, which comprises a bottom frame for supporting the sofa bed, a seat frame for fixing a sofa cushion, a backrest mounting support assembly for mounting a sofa backrest and a linkage telescopic assembly for driving and guiding the bottom frame and the seat frame to generate relative telescopic motion. By adopting the structure, the invention can greatly meet the small space use scene requirement of a living room or an office, and simultaneously provides more stable support and guide for the unfolding and folding of the sofa bed and provides guarantee for the use comfort of the sofa bed.

Inventors

  • XIAN PING

Assignees

  • 成都精维尚艺家具设计有限公司

Dates

Publication Date
20260512
Application Date
20260210

Claims (9)

  1. 1. The support telescopic frame structure for the sofa bed comprises a bottom frame (1) for supporting the sofa bed and a seat frame (2) for fixing a sofa cushion, and is characterized by further comprising a backrest mounting support assembly for mounting a sofa backrest and a linkage telescopic assembly for driving and guiding the bottom frame (1) and the seat frame (2) to generate relative telescopic motion; the bottom frame (1) is provided with supporting legs and is used for supporting the weight of the whole sofa bed, and one side of the bottom frame, which is close to the backrest, is provided with an opening design; The seat frame (2) is in sliding connection with the bottom frame (1), and the seat frame (2) can stretch and retract into and out of the inner space of the bottom frame (1) through an opening on the bottom frame (1) under the drive of the linkage stretching assembly so as to realize the unfolding and folding of the sofa bed; The linkage telescopic assembly comprises an electric push rod (3) serving as a power source, a connecting rod deformation mechanism for transmitting motion and changing the posture of the sofa backrest, and a sliding guide mechanism for restricting the motion path of the seat frame (2).
  2. 2. The support telescopic frame structure for the sofa bed according to claim 1, wherein the bottom frame (1) comprises a rectangular bottom frame body formed by four fixed supporting feet (11), two side connecting rods (12) with two parallel sides and a back connecting rod (13) through welding or fastening connection, at least one transverse fixing rod (14) is fixed between the side connecting rods (12) on two sides of the rectangular bottom frame body, and two guide supporting rods (15) are fixed between the transverse fixing rods (14) and the back connecting rod (13) in parallel.
  3. 3. The telescopic support structure for a sofa bed according to claim 2, wherein the seat frame (2) comprises a seat frame body, two sliding support feet (21) with pulleys are arranged below one side of the seat frame body far away from the sofa backrest, and one side of the seat frame body close to the sofa backrest is in sliding connection with the guide support rod (15) of the bottom frame (1) through the sliding guide mechanism.
  4. 4. A support telescopic structure for a sofa bed according to claim 2 or 3, characterized in that the cylinder fixed end (31) of the electric push rod (3) is hinged or fixedly connected to the transverse fixed rod (14), and the push rod telescopic end of the electric push rod (3) is hinged with the bottom or the side part of the seat frame (2).
  5. 5. A support telescopic structure for a sofa bed according to claim 2 or 3, characterized in that said link deforming mechanism comprises a support upright (41), a first link (42) and a second link (43); the lower end of the supporting upright rod (41) is fixedly connected with the seat frame (2), and the upper end of the supporting upright rod (41) is higher than the top surface of the seat frame (2); the first connecting rod (42) is formed by connecting a front section part (421) and a rear section part (422) and is of an integral acute angle bending structure, the upper end of the front section part (421) of the first connecting rod (43) is hinged with the upper end of the supporting vertical rod (41) to form a first hinge point (A), and the first connecting rod (42) is positioned at the outer side of the supporting vertical rod (41); The upper end of the second connecting rod (43) is hinged with the upper end of the rear section (422) of the first connecting rod (42) to form a second hinge point (B), and the lower end of the second connecting rod (43) is hinged with the guide supporting rod (15) fixed on the bottom frame (1) or an independent hinge seat to form a third hinge point (C); The backrest mounting support assembly is fixedly connected to an upper end portion of the rear section (422) of the first link (42) or an upper end portion of the second link (43).
  6. 6. The structure of claim 5, wherein the sliding guide mechanism comprises a guide support rod (15) and double guide wheels (51) matched with the guide support rod (15), the double guide wheels (51) are fixed at the lower part of the support upright rod (41) or the bottom of the seat frame (2) through a wheel frame (52), and the rod body of the guide support rod (15) is embedded between the upper roller and the lower roller of the double guide wheels (51) to form rolling friction fit.
  7. 7. The structure of a supporting telescopic frame for a sofa bed according to claim 6, wherein the cross section of the guiding supporting rod (15) is round or rectangular, and the roller groove type of the double guiding wheels (41) is matched with the cross section of the guiding supporting rod.
  8. 8. The structure of a support expansion bracket for a sofa bed according to claim 5, wherein the support upright (41) is L-shaped, the vertical section (411) thereof is fixedly connected with the seat frame (2), the horizontal section (412) thereof extends in a direction approaching to the sofa backrest, and the double guide wheels (45) are fixedly arranged below the end parts of the horizontal section (412) of the support upright (42).
  9. 9. The structure of claim 5, wherein the back mounting and supporting assembly comprises a positioning and mounting piece (61) for connecting with a back frame and a latch piece (62) for locking, the latch piece (62) comprises a latch male piece (621) and a latch female piece (622), the positioning and mounting piece (61) and the latch male piece (621) are respectively provided with matched screw holes, and the latch female piece (622) is fixed on the upper end part of the rear section part (422) of the first connecting rod (42) or the upper end part of the second connecting rod (43) through a fixing seat (623).

Description

Support expansion bracket structure for sofa bed Technical Field The invention belongs to the field of furniture, and particularly relates to a supporting telescopic frame structure for a sofa bed. Background The sofa bed is furniture with functions of a sofa and a bed, can provide a flexible use scheme in a limited space, is suitable for families or offices with limited space, can be used as a sofa in daytime, can be easily converted into a bed at night, provides additional sleeping space, has higher practicability and adaptability to the use space, and is popular with more and more people. The sofa bed has a core structure mainly comprising a telescopic mechanism for realizing the unfolding and folding between the backrest and the cushion, thereby realizing the switching between the sofa and the bed. The existing telescopic mechanisms are various in structure, and basically can meet the telescopic requirements, but the existing telescopic mechanisms often have the problems as follows: 1. The existing telescopic structure is used for ensuring that the telescopic function is not influenced on the premise of ensuring that the telescopic structure does not influence the layout of the sofa backrest and the cushion, and for this purpose, a plurality of telescopic structures are designed to be arc-shaped elbows with larger sizes at the positions of the rotary joints (see patent number 202420864948.0 and the patent with the name of an integrated detachable flat lying functional rack), and the parts, close to the positions of the sofa backrest, of the cushion are plugged into the arc-shaped elbows, so that the sofa is in an unfolded or folded state, and excessive gaps are not formed between the cushion and the backrest, thereby avoiding influencing the attractiveness and the use effect. However, such a design brings a problem that when the sofa backrest is changed from the vertical backrest state to the horizontal state, the horizontal stroke of the telescopic mechanism (i.e. the distance that the sofa cushion moves away from the sofa backrest) often exceeds 60cm, but the distance between the sofa and the tea table in the living room is generally 50-60cm according to the use habit, so that when the existing sofa bed is unfolded, the tea table position is often required to be moved in advance, and enough distance is reserved, so that the sofa is prevented from colliding with the tea table in the unfolding process, that is, the tea table needs to be moved back and forth each time the sofa is unfolded and folded, which brings a certain inconvenience to use. 2. The existing sofa telescopic structure is used for realizing sliding between the backrest and the cushion by means of the traditional sliding rail, roller rolling grooves and other structures, but the traditional sliding rail or the roller rolling grooves are required to be high in precision during installation, the installation requirement is high, and problems such as blocking and noise are easy to occur in the later use process, so that the normal use and experience of the sofa bed are affected. 3. The connection and fixation of the expansion bracket and the sofa backrest are realized. The existing telescopic frame is connected with the sofa backrest through the connecting sheet (such as a patent number 202420864948.0 and a name of an integrated detachable horizontal functional frame), the connecting sheet is welded and fixed on the telescopic frame and is provided with holes, and before the sofa backrest is installed on the telescopic frame, holes corresponding to the connecting sheet are drilled on the side framework (the batten) of the sofa backrest, but because the installation holes on the sofa backrest are temporarily drilled on site, the installation of the sofa backrest is not smooth due to the deviation of the drilling distance, the drilling height and the like, the installation efficiency is lower, even the sofa backrest cannot be drilled again due to the error of the drilling position, only part of frameworks can be replaced, the installation efficiency is seriously affected, and meanwhile, the installation cost is increased. Disclosure of Invention In order to overcome the defects of the prior art, the invention provides a support telescopic frame structure for a sofa bed, which solves the problems that the existing sofa bed telescopic structure has overlarge telescopic stroke, is easy to collide with a tea table and even hurt people, and simultaneously solves the problems of unsmooth sliding and lower installation efficiency of the existing sofa bed telescopic structure. The invention solves the problems by adopting the following technical scheme: The support telescopic frame structure for the sofa bed comprises a bottom frame for supporting the sofa bed, a seat frame for fixing a sofa cushion, a backrest mounting support assembly for mounting a sofa backrest and a linkage telescopic assembly for driving and guiding the bottom frame and the seat