CN216702096U - Folding limiting structure and folding sofa bed - Google Patents

Abstract

The utility model belongs to the field of folding sofa beds, and particularly relates to a folding limiting structure and a folding sofa bed, which are mainly used for improving the use comfort of a folding part. The folding sofa bed comprises a left bed body fixing piece for fixing on a left bed body of the folding sofa bed, a right bed body fixing piece for fixing on a right bed body of the folding sofa bed, a connecting piece with two ends respectively rotatably connected with the left bed body fixing piece and the right bed body fixing piece, and a reinforcing piece arranged in parallel with the connecting piece, wherein one end of the reinforcing piece is rotatably connected with the left bed body fixing piece, and the other end of the reinforcing piece is rotatably connected with the right bed body fixing piece; and a limiting component for preventing the connecting piece from moving downwards is arranged between the reinforcing piece and the connecting piece. The folding sofa bed has a simple structure, is easy to realize, improves the structural stability of the folding sofa bed in an unfolded state, and ensures the comfort level of the folding sofa bed.

Description

Folding limiting structure and folding sofa bed

Technical Field

The utility model belongs to the field of folding sofa beds, and particularly relates to a folding limiting structure and a folding sofa bed, which are mainly used for improving the use comfort of a folding part.

Background

At present, the use of the folding sofa bed is more and more extensive, the folding sofa bed is mainly characterized in that a connecting piece is arranged in the middle of the folding sofa bed, and the bed bodies on two sides of the connecting piece are hinged with the connecting piece to realize the folding and unfolding functions. A folding sofa bed connector as disclosed in patent publication No. CN207145436U, comprising a first side panel, a second side panel, and a bottom panel; the second side plate is provided with a notch; the first side plate and the second side plate are provided with a first through hole and a second through hole. Also discloses a folding sofa bed frame, which also comprises a middle supporting leg, a first bed frame, a second bed frame and a middle cross bar; the first bedstead and the second bedstead of folding sofa bed use pin or bolt and folding sofa bed connecting piece articulated mutually in first through-hole and the second through-hole department of folding sofa bed connecting piece, it can know to combine the figure of this patent simultaneously, because of first bedstead and the second bedstead of folding sofa bed can be folded towards relative party, realize folding function, but this kind of structure, when first bedstead and second bedstead receive pressure near connecting piece department, the position that whole folding sofa bed is close to the connecting piece easily sinks downwards, make the one end upwards perk that the connecting piece was kept away from to the both sides bed body, the structure is stable inadequately, influence the comfort level.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a folding limiting structure and a folding sofa bed, which are mainly used for improving the use comfort of a folding part.

In order to solve the technical problems, the application provides a folding limiting structure, which comprises a left bed body fixing part, a right bed body fixing part and a connecting part, wherein the left bed body fixing part is used for being fixed on a left bed body of a folding sofa bed, the right bed body fixing part is used for being fixed on a right bed body of the folding sofa bed, the two ends of the connecting part are respectively in rotating connection with the left bed body fixing part and the right bed body fixing part, the connecting part is arranged in parallel with the connecting part, one end of the reinforcing part is rotationally connected with the left bed body fixing part, and the other end of the reinforcing part is rotationally connected with the right bed body fixing part; and a limiting assembly for preventing the connecting piece from moving downwards is arranged between the reinforcing piece and the connecting piece.

In this application, the connecting piece rotates to be connected between left bed body mounting and right bed body mounting, make and to realize folding between the left part bed body and the right bed body, when the left part bed body and the right bed body take place to fold in connecting piece department, it takes place to rotate with the relative connecting piece of the right part bed body to be equivalent to the left part bed body, and also rotate respectively and connect on left bed body mounting and right bed body mounting because of the reinforcement both ends, the folding in-process must drive the reinforcement and remove, make and take place the displacement change between reinforcement and the connecting piece, in this application at the reinforcement with be equipped with spacing subassembly between the connecting piece, this spacing subassembly makes the left part bed body and the right bed body take place the displacement change under the state of expandeing between restriction reinforcement and the connecting piece, when connecting piece department receives pressure, can prevent that the connecting piece from moving down. The folding limiting structure is simple in structure and easy to realize, the structural stability of the folding sofa bed in the unfolding state is improved, and the comfort level of the folding sofa bed is guaranteed.

Preferably, the limiting assembly comprises a strip-shaped hole arranged on the reinforcing piece along the left-right direction, a connecting hole arranged on the connecting piece and a connecting shaft arranged on the right bed body fixing piece; the connecting shaft penetrates through the connecting hole and the strip-shaped hole to prevent the connecting piece from moving downwards.

Preferably, the right bed body fixing piece comprises a limiting piece arranged on the right side of the connecting shaft; the left bed body fixing piece comprises a first connecting part and a second connecting part which are arranged along the left-right direction; the left end of the connecting piece is rotatably connected with the first connecting part of the left bed body fixing piece, and the right end of the connecting piece is rotatably connected with the connecting shaft through the connecting hole; the left end of reinforcement with the second connecting portion of left side bed body mounting rotate to be connected, the right-hand member of reinforcement is equipped with towards left extension, supplies the connecting axle passes the bar hole makes the connecting axle is located when the bar hole left end the right-hand member of reinforcement is spacing in the below of locating part the connecting axle is located when the bar hole right-hand member the right-hand member of reinforcement in the left side of locating part is mobile.

Preferably, the right bed body fixing piece comprises a U-shaped buckle, and the opening of the buckle faces the left and is fixed on the right bed body; the connecting shaft is arranged at the U-shaped opening of the buckle, and the limiting part is a limiting rod which is arranged in the U-shaped opening and is positioned at the upper end of the buckle.

Preferably, the first connecting part is a first connecting rod arranged on the left bed body fixing part, and a first connecting hole for the first connecting rod to pass through is formed in the left end of the connecting part.

Preferably, the second connecting part is a second connecting rod arranged on the left bed body fixing part, and a second connecting hole for the second connecting rod to pass through is formed in the left end of the reinforcing part.

Preferably, the distance between the first connecting portion and the second connecting portion is equal to the length of the strip-shaped hole.

Preferably, the distance between the connecting shaft and the limiting piece is smaller than the length of the strip-shaped hole.

The application also provides a folding sofa bed, which comprises a left bed body, a right bed body and the folding limiting structure.

Preferably, the number of the folding limit structures is two; the two folding limiting structures are arranged on the front side and the rear side of the folding sofa bed and are respectively connected with the left bed body and the right bed body.

The utility model has the following technical effects:

1. in this application, fold the left bed body earlier when folding, fold the right bed body again (or fold the left bed body on the right bed body together with the connecting piece). When the left part bed body is folding, the relative connecting piece of the left part bed body takes place to rotate, reinforcement left end and left part bed body coupling, the rotation of the left part bed body drives the reinforcement and takes place certain removal, be equipped with the bar hole that the left right direction set up on the reinforcement, the connecting axle passes the bar hole (the bar hole cover is established on the connecting axle promptly), make the reinforcement can take place certain removal on the connecting axle, drive the demand that the reinforcement removed when satisfying the left part bed body and folding, do not influence the folding function of folding sofa bed. The connecting piece passes through the connecting hole and is connected with the connecting axle together with the bar hole for the connecting axle realizes the function of "one spool is multi-purpose", need not additionally set up the structure of being connected with the connecting piece rotation, reduces manufacturing procedure and material for the manufacturing, and simple structure easily realizes.

2. The left end of the connecting piece is rotationally connected with the first connecting part of the left bed body fixing piece, the right end of the connecting piece is rotationally connected with the connecting shaft of the right bed body fixing piece, the structure is simple, and the left bed body and the right bed body can be folded when the left bed body fixing piece and the right bed body fixing piece are connected. And because of folding sofa bed when folding and expansion, the rotation of the left part bed body drives the reinforcement and takes place certain removal, in this application, under the state that folding sofa bed expanded, the connecting axle was located bar hole left end, the reinforcement right-hand member tip at bar hole place had certain length apart from the connecting axle for the right-hand member of reinforcement just is located the below of locating part, and when connecting piece and locating part department received pressure, the locating part restriction reinforcement took place to rotate, and then restriction connecting piece took place to rotate, prevents to collapse under the connecting piece department. And at folding sofa bed folding in-process, the left part bed body is folding earlier, and relative connecting piece takes place to rotate, drives the reinforcement and removes towards the left side for the connecting axle is located the bar hole right-hand member, makes the right-hand member tip of reinforcement be close to the connecting axle, keep away from the locating part, does not restricted its rotation by the locating part, does not influence folding sofa bed's folding.

3. The connecting shaft is arranged at the opening of the U-shaped buckle of the buckle, two ends of the connecting shaft are connected with two sides of the U-shaped buckle, two ends of the connecting shaft are sealed by two sides of the U-shaped buckle, and the connecting piece and the reinforcing piece are prevented from falling off from the connecting shaft. The locating part sets up in the U-shaped opening, and is located the buckle upper end, and both ends also are connected with U-shaped buckle both sides, even it is the structure of spacing "pole", but intensity is higher.

4. The structure that first connecting portion, second connecting portion are the connecting rod, the left end of connecting piece is equipped with first connecting hole, and the left end of reinforcement is equipped with the second connecting hole, and the simple structure of first connecting rod and connecting rod accordant connection, second connecting rod and second connecting hole accordant connection easily realizes.

5. The distance between the first connecting part and the second connecting part is equal to the length of the strip-shaped hole, the second connecting part is far away from the first connecting part and is arranged at the end part of the left bed body fixing part, the left bed body fixing part rotates relative to the connecting part (is folded into a right angle from a flat angle) in the process of unfolding the folding sofa bed, the rotating shaft is a first connecting hole, the second connecting part does circular motion by taking the first connecting part as the shaft in the folding process of the left bed body fixing part and rotates 90 degrees, the moving distance of the second connecting part in the horizontal direction is the distance between the first connecting part and the second connecting part, the second connecting part drives the reinforcing part to move towards the left side, the distance between the first connecting part and the second connecting part is equal to the length of the strip-shaped hole, so that the length of the strip-shaped hole just meets the horizontal displacement generated when the left bed body is folded and the second connecting part rotates 90 degrees relative to the first connecting part, the length of the strip-shaped hole is just not limited when the folding sofa bed is folded and unfolded.

6. Distance between connecting axle and the locating part is less than the length in bar hole for when the connecting axle is located the left side in bar hole (under the state that folding sofa bed expanded), the right-hand member of the reinforcement at bar hole place surpasses the locating part in the horizontal direction, make the right-hand member of reinforcement just be located the below of locating part, be convenient for when connecting piece and reinforcement department received decurrent pressure, the rotation of locating part restriction reinforcement and further restrict taking place to rotate between connecting piece and the left part bed body and the right part bed body, and then make connecting piece and reinforcement can not the downstream, prevented folding sofa bed from collapsing down and influencing the comfort level under the state of opening.

Drawings

Fig. 1 shows a structure of the folding and spacing structure.

Fig. 2 is a structural diagram of each part of the folding limiting structure.

Fig. 3 is a partial folding structure diagram of the folding limiting structure.

Wherein, 1-the left bed body is fixed; 1-1-a first connection; 1-2-a second connecting portion; 2-right bed body fixing piece; 2-1-connecting shaft; 2-2-a limit stop; 2-3-buckling; 3-a connector; 3-1-connecting hole; 3-2-first connection hole; 4-a reinforcement; 4-1-strip shaped holes; 4-2-second connection hole; 5-left bed body; 6-right bed body.

Detailed Description

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that the conventional terms should be interpreted as having a meaning that is consistent with their meaning in the relevant art and this disclosure. The present disclosure is to be considered as an example of the utility model and is not intended to limit the utility model to the particular embodiments.

The use of the terms "upper," "lower," "left," "right," and the like herein is made solely for the purposes of illustration and description, and is not intended to be limiting.

The embodiment provides a folding limiting structure, as shown in fig. 1 to 3, which includes a left bed body fixing part 1 for fixing to a left bed body 5 of a folding sofa bed, a right bed body fixing part 2 for fixing to a right bed body 6 of the folding sofa bed, a connecting part 3 having two ends rotatably connected to the left bed body fixing part 1 and the right bed body fixing part 2, and a reinforcing part 4 arranged in parallel with the connecting part 3, wherein one end of the reinforcing part 4 is rotatably connected to the left bed body fixing part 1, and the other end of the reinforcing part 4 is rotatably connected to the right bed body fixing part 2; and a limiting component for preventing the connecting piece 3 from moving downwards is arranged between the reinforcing piece 4 and the connecting piece 3.

In this embodiment, left bed body mounting 1 and right bed body mounting 2 are fixed connection respectively on left part bed body 5 and right bed body 6, and connect through connecting piece 3 between left bed body mounting 1 and the right bed body mounting 2, for the ease of realizing that left part bed body 5 and right bed body 6 are folded, connecting piece 3 both ends are connected with left bed body mounting 1 and right bed body mounting 2 rotation respectively. In order to prevent the left bed body 5 and the right bed body 6 from collapsing easily due to stress at the connecting piece 3 under the condition of unfolding, the reinforcing piece 4 and the limiting component are added at the connecting piece 3 in the embodiment, on one hand, the reinforcing piece 4 and the connecting piece 3 are arranged in parallel to share the pressure applied to the connecting piece 3 and enhance the structural stability of the connecting piece 3; on the other hand, the two ends of the reinforcing member 4 are also respectively rotationally connected with the left bed body fixing member 1 and the right bed body fixing member 2 as well as the connecting member 3, the left bed body fixing member 1 and the right bed body fixing member 2 are rotated relative to the connecting member 3, and the reinforcing member 4 is inevitably dragged to generate certain displacement change along with the change of the angle between the left bed body fixing member 1 and the right bed body fixing member 2 and the connecting member 3, in this embodiment, a limiting component is arranged between the connecting member 3 and the reinforcing member 4, and the connecting member 3 is stressed in the unfolded state of the left bed body 5 and the right bed body 6, so that when the left bed body fixing member 1 and the right bed body fixing member 2 have a tendency to rotate relative to the connecting member 3, the limiting component prevents the reinforcing member 4 from generating displacement change, further prevents the left bed body fixing member 1 and the right bed body fixing member 2 from rotating relative to the connecting member 3, further prevents the left bed body 5 and the right bed body 6 from collapsing under the stress at the connecting member 3 under the unfolded state, the structural stability of the folding sofa bed in the unfolding state is ensured.

In this embodiment, the limiting assembly comprises a strip-shaped hole 4-1 arranged on the reinforcing piece 4 along the left-right direction, a connecting hole 3-1 arranged on the connecting piece 3, and a connecting shaft 2-1 arranged on the right bed body fixing piece 2; the connecting shaft 2-1 penetrates through the connecting hole 3-1 and the strip-shaped hole 4-1 to prevent the connecting piece 3 from moving downwards. The strip-shaped holes 4-1 enable the reinforcing pieces 4 to move relatively on the connecting shafts 2-1 without being limited, so that the folding of the folding sofa bed cannot be realized.

In this embodiment, the reinforcing element 4 and the limiting component only act on the left bed body 5 and the right bed body 6 in the unfolded state and under the condition that the connecting element 3 is under pressure, so as to prevent the left bed body fixing element 1 and the right bed body fixing element 2 from rotating relative to the connecting element 3, but not to affect the folding between the left bed body 5 and the right bed body 6. Specifically, in this embodiment, the right bed body fixing member 2 includes a limiting member 2-2 disposed on the right side of the connecting shaft 2-1; the left bed body fixing piece 1 comprises a first connecting part 1-1 and a second connecting part 1-2 which are arranged along the left-right direction; the left end of the connecting piece 3 is rotationally connected with a first connecting part 1-1 of the left bed body fixing piece 1, and the right end of the connecting piece 3 is rotationally connected with the connecting shaft 2-1 through the connecting hole 3-1; the left end of the reinforcing part 4 is rotatably connected with the second connecting part 1-2 of the left bed body fixing part 1, the right end of the reinforcing part 4 is provided with a strip-shaped hole 4-1 which extends towards the left and is used for the connecting shaft 2-1 to pass through, so that when the connecting shaft 2-1 is positioned at the left end of the strip-shaped hole 4-1, the right end of the reinforcing part 4 is limited below the limiting part 2-2, and when the connecting shaft 2-1 is positioned at the right end of the strip-shaped hole 4-1, the right end of the reinforcing part 4 is movable on the left side of the limiting part 2-2. In this embodiment, the second connecting portion 1-2 is arranged at the end of the left bed body fixing member 1 facing away from the first connecting portion 1-1. When the left bed body 5 and the right bed body 6 are folded, the left bed body 5 is firstly folded: in the unfolded state, the left bed body 5 and the connecting piece 3 are in a flat angle, when the left bed body 5 is folded towards the right bed body 6, the left bed body is folded into a state of being in a right angle with the connecting piece 3, because the reinforcing piece 4 is connected with the left bed body fixing piece 1, and the left bed body fixing piece 1 is fixedly connected with the left bed body 5, in the rotating and folding process of the left bed body fixing piece 1, the left bed body fixing piece 1 rotates relative to the connecting piece 3 at the connecting hole 3-1 of the connecting piece 3, the second connecting part 1-2 rotates from the right end of the first connecting part 1-1 to the lower end of the second connecting part 1-2, and the second connecting part 1-2 moves towards the left in the horizontal direction to drive the reinforcing piece 4 connected with the second connecting part to move towards the left, so that the connecting shaft 2-1 is positioned at the right end of the strip-shaped hole 4-1, at this time, the right end of the reinforcing part has a certain distance with the limiting part 2-2 on the right side of the connecting shaft 2-1, and then the folded left bed body fixing part 1 together with the connecting piece 3 is folded onto the right bed body 6 (or the right bed body 6 is folded onto the left bed body 5), so that the rotation between the connecting piece 3 and the right bed body 6 is not influenced.

When the bed body 5 is unfolded, the second connecting part 1-2 is positioned at the right end of the first connecting part 1-1 under the condition that the left bed body 5 is not folded, the connecting shaft 2-1 is positioned at the left end of the strip-shaped hole 4-1, the right end of the reinforcing part 4 is limited below the limiting part 2-2, when the connecting piece 3 is pressed, the reinforcing piece 4 is also pressed by the same pressure because of being arranged in parallel with the connecting piece 3, so that the connecting piece 3 and the reinforcing piece 4 both tend to move downwards, the downward movement of the reinforcing piece 4 and the connecting piece 3 inevitably causes the rotation between the reinforcing piece 4 and the connecting piece 3 and the left bed body 5 and the right bed body 6, and the downward pressure causes the end of the reinforcing member 4 to rotate upward, while the right end of the reinforcing member 4 is restrained below the restraining member 2-2 and cannot rotate, the reinforcing element 4 cannot move downward, and the connecting element 3 arranged next to it cannot move downward.

In this embodiment, during the folding and unfolding of the folding sofa bed, the second connecting portion 1-2 connected to the reinforcing member 4 is located at either the right end of the first connecting portion 1-1 or the lower end of the first connecting portion 1-1, and the moving distance of the second connecting portion 1-2 in the horizontal direction is just the distance between the first connecting portion 1-1 and the second connecting portion 1-2, and during the movement of the second connecting portion 1-2, the reinforcing member 4 moves towards the left side or the right side, the moving distance is the moving displacement of the second connecting portion 1-2 in the horizontal direction and is also the maximum displacement of the reinforcing member 4 during the folding and unfolding, and the distance between the first connecting portion 1-1 and the second connecting portion 1-2 is equal to the length of the strip-shaped hole 4-1. So that the strip-shaped hole 4-1 just meets the maximum displacement of the stiffener 4 moving towards the left or towards the right. In addition, the distance between the connecting shaft 2-1 and the limiting piece 2-2 is smaller than the length of the strip-shaped hole 4-1. Make under folding sofa bed development condition spacing piece 2-2 just locate reinforcement portion right-hand member top, prevent the rotation of reinforcement 4, and then prevent to take place to rotate between connecting piece 3 and left part bed body 5, the right part bed body 6, prevent that the condition of stress collapse takes place in connecting piece 3 department.

In this embodiment, the right bed body fixing member 2 includes a U-shaped buckle 2-3, and the opening of the buckle 2-3 faces the left and is fixed on the right bed body; the connecting shaft 2-1 is arranged at a U-shaped opening of the buckle 2-3, and the limiting part 2-2 is a limiting rod which is arranged in the U-shaped opening and is positioned at the upper end of the buckle 2-3. The U-shaped buckle 2-3 can seal two ends of the connecting shaft 2-1, and the connecting hole 3-1 and the strip-shaped hole 4-1 can rotate on the connecting shaft 2-1, so that the right ends of the connecting piece 3 and the reinforcing piece 4 are prevented from being separated from the right bed body fixing piece 2. The limiting piece 2-2 is positioned at the upper end of the buckle 2-3, and two ends of the limiting piece are connected with two side walls of the buckle 2-3, so that the structure is stable, and the limiting piece is integrated with the buckle 2-3 and is not easy to bend.

The first connecting part 1-1 is a first connecting rod arranged on the left bed body fixing part 1, and the left end of the connecting part 3 is provided with a first connecting hole 3-2 for the first connecting rod to pass through. By sleeving the first connecting holes 3-2 of the connecting piece 3 on the first connecting rods of the left bed body fixing piece 1, the connecting piece 3 and the left bed body fixing piece 1 can be connected, and the requirement of rotation between the connecting piece 3 and the left bed body fixing piece 1 can be met by utilizing the characteristic that the first connecting holes 3-2 can rotate on the first connecting rods. The connection mode of sleeving the first connecting rod and the first connecting hole 3-2 does not need to additionally arrange a rotatable structure between the left bed body fixing piece 1 and the connecting piece 3, and the structure is simple and convenient to manufacture. Similarly, the second connecting portion 1-2 is a second connecting rod arranged on the left bed body fixing member 1, and a second connecting hole 4-2 through which the second connecting rod passes is formed in the left end of the reinforcing member 4.

The embodiment also provides a folding sofa bed, which comprises a left bed body 5, a right bed body 6 and the folding limiting structure. The number of the folding limit structures is two; the two folding limit structures are arranged on the front side and the rear side of the folding sofa bed and are respectively connected with the left bed body 5 and the right bed body 6. The stability of the folding sofa bed is enhanced.

Although embodiments of the present invention have been described, various changes or modifications may be made by one of ordinary skill in the art within the scope of the appended claims.

Claims (10)

1. The utility model provides a folding limit structure, including be used for fixing at the left bed body mounting of the left part bed body of folding sofa bed, be used for fixing at the right bed body mounting of the right part bed body of folding sofa bed, both ends respectively with left side bed body mounting with right side bed body mounting rotates the connecting piece of connecting, its characterized in that:

the left bed body fixing part is rotatably connected with the right bed body fixing part;

and a limiting assembly for preventing the connecting piece from moving downwards is arranged between the reinforcing piece and the connecting piece.

2. A fold-limiting structure as recited in claim 1, further comprising:

the limiting assembly comprises a strip-shaped hole arranged on the reinforcing piece along the left-right direction, a connecting hole arranged on the connecting piece and a connecting shaft arranged on the right bed body fixing piece;

the connecting shaft penetrates through the connecting hole and the strip-shaped hole to prevent the connecting piece from moving downwards.

3. A fold-limiting structure as recited in claim 2, further comprising:

the right bed body fixing piece comprises a limiting piece arranged on the right side of the connecting shaft;

the left bed body fixing piece comprises a first connecting part and a second connecting part which are arranged along the left-right direction;

the left end of the connecting piece is rotatably connected with the first connecting part of the left bed body fixing piece, and the right end of the connecting piece is rotatably connected with the connecting shaft through the connecting hole;

the left end of reinforcement with the second connecting portion of left side bed body mounting rotate to be connected, the right-hand member of reinforcement is equipped with towards left extension, supplies the connecting axle passes the bar hole makes the connecting axle is located when the bar hole left end the right-hand member of reinforcement is spacing in the below of locating part the connecting axle is located when the bar hole right-hand member the right-hand member of reinforcement in the left side of locating part is mobile.

4. A fold-limiting structure as recited in claim 3, further comprising:

the right bed body fixing piece comprises a U-shaped buckle, and the opening of the buckle faces the left and is fixed on the right bed body;

the connecting shaft is arranged at the U-shaped opening of the buckle, and the limiting part is a limiting rod which is arranged in the U-shaped opening and is positioned at the upper end of the buckle.

5. A fold-limiting structure as recited in claim 3, further comprising:

the first connecting part is a first connecting rod arranged on the left bed body fixing part, and a first connecting hole for the first connecting rod to penetrate through is formed in the left end of the connecting part.

6. A fold-limiting structure as recited in claim 3, further comprising:

the second connecting portion are second connecting rods arranged on the left bed body fixing piece, and a second connecting hole for the second connecting rods to penetrate through is formed in the left end of the reinforcing piece.

7. A fold-limiting structure as recited in claim 3, further comprising:

the distance between the first connecting part and the second connecting part is equal to the length of the strip-shaped hole.

8. A fold-limiting structure as recited in claim 3, further comprising:

the distance between the connecting shaft and the limiting part is smaller than the length of the strip-shaped hole.

9. The utility model provides a folding sofa bed, includes left part bed body and right part bed body, its characterized in that:

further comprising a fold limiting structure according to any one of claims 1 to 8.

10. A folding sofa bed according to claim 9, wherein:

the number of the folding limit structures is two;

the two folding limiting structures are arranged on the front side and the rear side of the folding sofa bed and are respectively connected with the left bed body and the right bed body.

Images