Search

CN-122004621-A - Flat pushing expansion bracket for sofa bed and deformation leveling method thereof

CN122004621ACN 122004621 ACN122004621 ACN 122004621ACN-122004621-A

Abstract

The invention discloses a horizontal pushing expansion bracket for a sofa bed and a deformation leveling method thereof, wherein the horizontal pushing expansion bracket comprises a bottom frame and a seat frame, wherein the bottom frame and the seat frame realize relative sliding through an expansion assembly, one side of the seat frame is provided with supporting legs and is hinged with the supporting legs, and the other side of the seat frame is hinged with the expansion assembly; when the sofa bed is in the sofa function state, the horizontal height of one side of the seat frame with the supporting legs is higher than one side of the seat frame hinged with the telescopic component, so that the seat frame is in an inclined state, and when the telescopic component drives the seat frame to move to the limit position in the direction away from the bottom frame, the seat frame is switched to the horizontal state. By adopting the structure, the invention can realize the automatic conversion of the front high and rear low inclined posture in the sofa state and the horizontal posture in the bed state, simultaneously meet the dual requirements of leaning and sitting comfort and sleeping comfort, and solve the technical contradiction existing in the design of sofa beds for a long time.

Inventors

  • XIAN PING

Assignees

  • 成都精维尚艺家具设计有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (9)

  1. 1. The flat push expansion bracket for the sofa bed is characterized by comprising a bottom frame and a seat frame, wherein the bottom frame and the seat frame realize relative sliding through an expansion assembly, one side of the seat frame is provided with supporting legs (3) and is hinged with the supporting legs (3), and the other side of the seat frame is hinged with the expansion assembly; when the sofa bed is in a sofa functional state, the horizontal height of the side of the seat frame with the supporting legs (3) is higher than the hinged side of the seat frame and the telescopic component, so that the seat frame is in an inclined state; When the telescopic assembly drives the seat frame to move to the limit position in the direction away from the bottom frame, the seat frame is switched to the horizontal state.
  2. 2. The horizontal pushing expansion bracket for sofa bed according to claim 1, wherein the bottom frame comprises two parallel guide rods (5) and a cross rod (4) vertically fixedly connected with the two guide rods (5); The seat frame comprises an upper layer supporting frame (1), a lower layer supporting frame (2) and supporting legs (3), pulleys are arranged at the bottom ends of the supporting legs (3), one side of the upper layer supporting frame (1) is hinged to the top ends of the supporting legs (3), the lower layer supporting frame (2) is fixedly connected with the middle parts of the supporting legs (3) vertically, the lower layer supporting frame (2) is provided with two guide rods (21) which are arranged in parallel, and one ends of the guide rods (21) are provided with double guide wheels (7) and are connected to the guide rods (5) in a sliding and penetrating mode.
  3. 3. A push-flat telescopic frame for a sofa bed according to claim 2, wherein said telescopic assembly comprises: The fixed seat (61) of the electric push rod (6) is arranged on the cross rod (4), and the push rod telescopic end (62) of the electric push rod (6) is fixedly connected with the lower support frame (2); the guide wheel set (14) comprises at least two guide wheels (141) and clamping plates (142) arranged at two sides of the guide wheels (141), the guide wheels (141) are arranged between the clamping plates (142) in a rolling way, and the guide wheels (41) are arranged between the guide rods (21) and the guide rods (5) and can roll back and forth along the guide rods (5); The deformation support frame comprises a first deformation support rod (11) and a second deformation support rod (12), wherein the lower end of the first deformation support rod (11) is hinged with the clamping plate (142), the upper end of the first deformation support rod (11) is hinged with the upper end of the second deformation support rod (12), the lower end of the second deformation support rod (12) is hinged with a hinged lug seat (13) fixed on a guide rod (21), and the top end of the second deformation support rod (12) is hinged with the upper support frame (1); The limiting column (8) is arranged on the guide rod (21), the free end of the limiting column (8) extends towards the direction close to the guide rod (5), and the guide wheel set (14) is positioned between the limiting column (8) and the double guide wheels (7); the limit stop (9) is fixedly arranged on the guide rod (5) and close to the upper end face of the cross rod (4), and the vertical distance from the limit post (8) to the upper end face of the guide rod (5) is larger than the thickness of the limit stop (9); The spring (10), one end of the spring (10) is fixed on the limit stop (9), the other end of the spring (10) is fixedly connected with the clamping plate (142), and the spring (10) is always in a stretching state; When the sofa bed is in a sofa functional state, the horizontal height of the side of the seat frame with the supporting legs (3) is higher than the hinged side of the seat frame and the second deformation supporting rods (12), so that the upper supporting frame (1) is in an inclined state; When the electric push rod (6) drives the lower support frame (2) and drives the whole seat frame to move to a limit position in a direction away from the bottom frame, the upper support frame (1) is lifted to a horizontal state by the deformation support frame.
  4. 4. A push-flat expansion bracket for sofa bed according to claim 3, characterized in that the movement path of the limit post (8) during expansion of the expansion bracket is divided into two phases: The first unfolding stage comprises the steps that the electric push rod (6) pushes the lower supporting frame (2) to move in a direction away from the bottom frame, the double guide wheels (7) roll along the guide rods (5) along with the lower supporting frame (2), at the moment, guide wheels (141) on the guide wheel group (14) close to the limit posts (8) prop against the limit posts (8), the guide wheel group (14) synchronously moves along with the lower supporting frame (2), the limit posts (8) do not contact with the limit stop blocks (9), and the first deformation supporting rods (11) and the second deformation supporting rods (12) are kept relatively static due to the blocking effect of the limit posts (8); And in the second unfolding stage, when the limit post (8) moves to the position above the limit stop block (9), the guide wheel (141) of the guide wheel group (14) close to the limit post (8) stops moving due to the blocking of the limit stop block (9), the electric push rod (6) pushes the lower support frame (2) to continue moving, and at the moment, the lower end of the first deformation support rod (11) follows the guide wheel group (14) to stop moving, and the lower end of the second deformation support rod (12) follows the lower support frame (2) to continue moving, so that the first deformation support rod (11) and the second deformation support rod (12) relatively rotate, and the upper support frame (1) is gradually lifted to a horizontal state from an inclined state.
  5. 5. A push-flat telescopic frame for sofa bed according to claim 3, characterized in that the movement path of the limit post (8) during retraction of the frame is divided into two phases: The first retraction stage comprises the steps that an electric push rod (6) pushes a lower support frame (2) to move towards the direction close to a bottom frame, at the moment, the guide wheel set (14) does not move along with a guide rod (21) immediately due to the tensile force action of a spring (10) on the guide wheel set (14), the lower end of a first deformation support rod (11) stops moving along with the guide wheel set (14), and the lower end of a second deformation support rod (12) starts moving along with the guide rod (21), so that the first deformation support rod (11) and the second deformation support rod (12) relatively rotate, the top end of the second deformation support rod (12) is pushed to move downwards, and the rear side of the upper support frame (1) is driven to descend, so that the upper support frame (1) is changed from a horizontal state to an inclined state; And in the second retraction stage, when the limit post (8) moves to contact with the guide wheel (141) of the guide wheel set (14) along with the guide rod (21) and props against the guide wheel (141), under the thrust action of the electric push rod (6), the guide wheel set (14) starts to synchronously move along with the limit post (8) and the guide rod (21) as the thrust of the limit post (8) to the guide wheel set (14) is larger than the tension of the spring (10) to the guide wheel set (14), the first deformation support rod (11) and the second deformation support rod (12) keep relatively static due to the blocking action of the limit post (8), the inclination angle of the upper support frame (1) keeps unchanged, the electric push rod (6) retracts to the limit position, and the sofa bed returns to the sofa functional state.
  6. 6. A push-flat telescopic frame for a sofa bed according to claim 3, characterized in that the limit stop (9) is arranged to block only the guiding wheel set (14) and not the limit post (8), the limit post (8) being accessible above the limit stop (9).
  7. 7. A horizontal pushing expansion bracket for a sofa bed according to claim 3, further comprising two connecting lug seats (15) arranged on the upper supporting frame (1), wherein the two connecting lug seats (15) are provided with strip-shaped holes (151) in the horizontal direction, and the supporting legs (3) are in rotary connection with the upper supporting frame (1) through pin shafts and the connecting lug seats (15).
  8. 8. A horizontal pushing expansion bracket for sofa bed according to claim 3, characterized in that the pulleys at the bottom ends of the supporting legs (3) are universal wheels or directional wheels for supporting the front part of the seat frame and sliding on the ground.
  9. 9. A method for leveling deformation of a flat push expansion bracket for a sofa bed based on any one of claims 1-8, comprising the steps of: S1, in an initial state, the sofa bed is in a sofa function state, the electric push rod (6) is in a retracted state, and the upper supporting frame (1) of the seat frame is in a front high and rear low inclined state so as to provide a comfortable leaning and sitting angle; S2, in a first unfolding stage, starting an electric push rod (6), wherein a push rod telescopic end (62) of the electric push rod pushes a lower supporting frame (2) and the whole seat frame to move in a direction away from the bottom frame, at the moment, a guide wheel (141) on a guide wheel group (14) close to a limit column (8) is propped against the limit column (8), the guide wheel group (14) synchronously moves along with the lower supporting frame (2), the limit column (8) does not contact with a limit stop block (9), and a first deformation supporting rod (11) and a second deformation supporting rod (12) are kept relatively static due to the blocking effect of the limit column (8), and the inclination angle of an upper supporting frame (1) is kept unchanged; S3, in the second unfolding stage, when the limit post (8) moves to the position above the limit stop (9), the guide wheel (141) of the guide wheel group (14) close to the limit post (8) stops moving due to the blocking of the limit stop (9), the electric push rod (6) pushes the lower support frame (2) to continue moving, at the moment, the lower end of the first deformation support rod (11) stops moving along with the guide wheel group (14), the lower end of the second deformation support rod (12) continues moving along with the lower support frame (2), so that the first deformation support rod (11) and the second deformation support rod (12) relatively rotate, the top end of the second deformation support rod (12) is pushed to be lifted upwards, and the rear side of the upper support frame (1) is driven to be lifted; S4, in a final state, when the electric push rod (6) pushes the seat frame to reach a limit position, the top end of the second deformation support rod (12) lifts the rear side of the upper support frame (1) to be at the same horizontal level with the front side of the upper support frame (1), namely the upper support frame (1) is switched to a horizontal state, and the sofa bed is converted into a bed functional state; s5, returning to an inclined state, wherein the electric push rod (6) pushes the lower support frame (2) to move towards the direction close to the bottom frame, at the moment, the guide wheel group (14) cannot move along with the guide rod (21) immediately due to the tensile force action of the spring (10) on the guide wheel group (14), and the lower end of the first deformation support rod (11) stops moving along with the guide wheel group (14) and the lower end of the second deformation support rod (12) starts moving along with the guide rod (21), so that the first deformation support rod (11) and the second deformation support rod (12) relatively rotate, the top end of the second deformation support rod (12) is pushed to move downwards, and the rear side of the upper support frame (1) is driven to descend, so that the upper support frame (1) is changed into the inclined state from the horizontal state; S6, returning to an initial state, when the limit post (8) moves to be in contact with the guide wheel (141) of the guide wheel set (14) along with the guide rod (21) and props against the guide wheel (141), under the thrust action of the electric push rod (6), the guide wheel set (14) starts to synchronously move along with the limit post (8) and the guide rod (21) as the thrust of the limit post (8) to the guide wheel set (14) is larger than the tension of the spring (10) to the guide wheel set (14), the first deformation support rod (11) and the second deformation support rod (12) keep relatively static due to the blocking action of the limit post (8), the inclination angle of the upper support frame (1) keeps unchanged, the electric push rod (6) is retracted to a limit position, and the sofa bed returns to a sofa functional state.

Description

Flat pushing expansion bracket for sofa bed and deformation leveling method thereof Technical Field The invention belongs to the field of furniture, and particularly relates to a horizontal pushing expansion bracket for a sofa bed and a deformation leveling method thereof. 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. As shown in fig. 9 and 10, in order to obtain better comfort level of sitting and leaning, the conventional sofa bed is often designed with a cushion part in an inclined state, i.e. with a high front and a low rear, the position of one side of the sofa cushion far away from the sofa backrest is higher, and the position of one side of the sofa cushion close to the sofa backrest is lower. However, problems arise when the sofa bed is unfolded into the bed state. Because the sofa cushion part is in an inclined state, the whole unfolded bed plane is not completely horizontal, when a user lies on the cushion of the sofa bed and uses the sofa bed, the body can naturally slide to the lowest inclined position, so that the user is blocked at the included angle formed by the cushion and the backrest, the sleeping comfort degree is affected, the user is more laborious to turn over or adjust the sleeping posture, and the sleeping quality is seriously affected. In addition, for a user who is used to watch a television or play a mobile phone on a sofa bed after being fully unfolded, as shown in fig. 10, when the user sits on the sofa cushion, the feet of the user are placed in front of the cushion, and the buttocks are located behind the cushion (i.e., near the backrest), at this time, the foot horizontal position of the user is higher than the horizontal position of the buttocks, the feet, buttocks and back form a V-shape, the legs and the back form an inward folded state and are clamped between the cushion and the backrest, and due to the weight of the human body, the inward folded state can cause the extrusion of the body, and long-term maintenance of the state not only causes extreme physical discomfort to the user, but also may cause chronic diseases such as joint deformation, and such design defects are often not easily perceived by the user at first. On the contrary, if the cushion part of the sofa bed is designed to be in a horizontal state at the beginning, although the sleeping experience under the functional state of the bed is guaranteed, when the sofa is used as a sofa, the whole leaning and sitting package sense and the comfort level are greatly reduced, the requirement of a user on the sofa function cannot be met, and the comfort level of the sofa bed on the leaning and sitting function and the sleeping function cannot be considered. Therefore, the traditional sofa bed design cannot meet the comfort requirements of the leaning and sitting function and the sleeping function, and obvious contradiction exists between the two. How to realize the automatic conversion between the inclined sitting posture in the sofa state and the horizontal prone posture in the bed state in a limited space through the innovative design of a mechanical structure becomes a technical problem to be solved in the field. Disclosure of Invention In order to overcome the defects of the prior art, the invention provides a horizontal pushing expansion bracket for a sofa bed and a deformation leveling method thereof, and solves the problem that the existing sofa bed cannot achieve both comfort level and sleeping quality. The invention solves the problems by adopting the following technical scheme: The flat push expansion bracket for the sofa bed comprises a bottom frame and a seat frame, wherein the bottom frame and the seat frame realize relative sliding through an expansion assembly, one side of the seat frame is provided with supporting legs and is hinged with the supporting legs, and the other side of the seat frame is hinged with the expansion assembly; When the sofa bed is in a sofa functional state, the horizontal height of the side of the seat frame with the supporting legs is higher than the hinged side of the seat frame and the telescopic component, so that the seat frame is in an inclined state; When the telescopic assembly drives the seat frame to move to the limit position in the direction away from the bottom frame, the seat frame is switched to the horizontal state. Further, as a preferable technical scheme, the bottom frame comprises two parallel guide rods and a cross rod vertically and fixedly connected with the two guide rods; The seat frame comprises an upper layer supporting frame, a lower layer supporting frame and supporting legs, pulleys are arranged at t