Folding iron stand of sofa bed

Abstract

The utility model discloses a folding iron stand of a sofa bed. The folding iron stand of the sofa bed comprises a base plate, a first rotating part, a second rotating part, a first assembling part and a second assembling part, the first rotating part comprises a connecting part, a first long arm is arranged on one side of the connecting part, the bottom end of the first long arm is pivoted to the front side of the base plate, and a first limiting pin is arranged on the middle front portion of the base plate; the top end of the first long arm is pivoted to the front side of the first assembly part, a first short arm is arranged on the other side of the connecting part, the top of the first short arm is pivoted to the front side of the second assembly part, the second rotating part comprises a second long arm and a second short arm which are integrally formed, and the top end of the second long arm is pivoted to the rear side of the first assembly part. The top of the second short arm is pivoted to the rear side of the base plate, the intersection of the bottom ends of the second short arm and the second long arm is pivoted to the rear side of the second assembly part, and a second limiting pin is arranged on the middle rear portion of the base plate. According to the utility model, the problems of weak supporting force and poor stability in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the field of home furnishing manufacturing, in particular to a folding iron frame of a sofa bed. Background Art

[0002] Currently, there are foldable sofa beds on the market, which are unfolded to form a sleeping position through a folding mechanism and folded to form a sitting position through a folding mechanism. Generally, sofa beds are used more in a sitting position, so the strength of the folding mechanism in the sitting position is required to be higher. However, when the sofa bed is in a sitting position, the distance between the two rods used to support the upper sofa seat of the existing folding mechanism is too small, so the support force for the upper sofa seat is weak and the stability is poor. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a folding iron frame of a sofa bed which has strong supporting force and is stable and reliable.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the folding iron frame of the sofa bed of the utility model is:

[0005] A folding iron frame of a sofa bed comprises a base plate, a first rotating member, a second rotating member, a first assembly member and a second assembly member, the first rotating member comprises a connecting portion, a first long arm is arranged on one side of the connecting portion, the bottom end of the first long arm is pivotally connected to the front side of the base plate, a first limiting pin for blocking the first long arm from rotating inward is arranged on the middle front portion of the base plate, the top end of the first long arm is pivotally connected to the front side of the first assembly member, a first short arm is arranged on the other side of the connecting portion, the top end of the first short arm is pivotally connected to the front side of the second assembly member, the second rotating member comprises an integrally formed second long arm and a second short arm, the top end of the second long arm is pivotally connected to the rear side of the first assembly member, the top end of the second short arm is pivotally connected to the rear side of the base plate, the intersection of the bottom ends of the second short arm and the second long arm is pivotally connected to the rear side of the second assembly member, and a second limiting pin for blocking the second short arm from rotating outward is arranged on the middle rear portion of the base plate.

[0006] Preferably, a third limiting pin is arranged on the top of the first long arm, and a first limiting surface and a second limiting surface cooperating with the third limiting pin are formed on the bottom of the first assembly part.

[0007] Preferably, a convex hull is provided at the intersection of the bottom ends of the second short arm and the second long arm, and the outer side wall of the convex hull is coplanar with the outer side wall of the first short arm.

[0008] Preferably, a reinforcing rib is provided in the middle of the connecting portion.

[0009] Preferably, a first hanging pin is arranged at the bottom end of the first short arm, a second hanging pin is arranged at the rear side of the base plate, and a tension spring is arranged between the first and second hanging pins.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The top of the second short arm is pivotally connected to the rear side of the base plate, and the intersection of the bottom ends of the second short arm and the second long arm is pivotally connected to the rear side of the second assembly part. When the first and second rotating members are flipped inward, that is, the sofa bed is in a sitting position, the distance between the first and second long arms for supporting the first assembly part is increased, thereby enhancing the supporting force of the first assembly part and ensuring that the overall structure is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the folding iron frame of the sofa bed of the utility model in a sitting position;

[0013] Figure 2 It is a structural schematic diagram of the folding iron frame of the sofa bed of the utility model in a sleeping position;

[0014] Figure 3 is a schematic structural diagram of a first rotating member;

[0015] Figure 4 Schematic diagram of the structure of the second rotating member.

[0016] Among them, 1 is a substrate, 11 is a first limiting pin, 12 is a second hanging pin, 13 is a second limiting pin, 2 is a first rotating member, 21 is a connecting portion, 21 is a reinforcing rib, 22 is a first long arm, 22 is a third limiting pin, 23 is a first short arm, 23 is a first hanging pin, 3 is a second rotating member, 31 is a second long arm, 32 is a second short arm, 33 is a convex bulge, 4 is a first assembly part, 41 is a first limiting surface, 42 is a second limiting surface, 5 is a second assembly part, and 6 is a tension spring. DETAILED DESCRIPTION

[0017] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0018] like Figure 1-4As shown, a folding iron frame of a sofa bed includes a base plate 1, a first rotating member 2, a second rotating member 3, a first assembly member 4 and a second assembly member 5. The first rotating member includes a connecting portion 21, a first long arm 22 is integrally formed at the top of the connecting portion, the bottom end of the first long arm is pivoted to the front side of the base plate, a first limiting pin 11 for blocking the first long arm from rotating inward is installed at the middle front portion of the base plate, the top end of the first long arm is pivoted to the front side of the first assembly member, a third limiting pin 221 is installed at the top of the first long arm, a first limiting surface 41 and a second limiting surface 42 cooperating with the third limiting pin are provided at the bottom of the first assembly member, a first short arm 23 is integrally formed at the bottom end of the connecting portion, the top of the first short arm is pivoted to the front side of the second assembly member, a first hanging pin 231 is installed at the bottom end of the first short arm, a second hanging pin 12 is installed at the rear side of the base plate, and a tension spring 6 is installed between the first and second hanging pins. When the sofa bed needs to be unfolded, the tension spring first provides assistance, which makes it effortless to flip the sofa seat, and then provides resistance to prevent the sofa seat from falling too quickly, thereby improving safety; similarly, when the sofa bed needs to be folded, the tension spring first provides assistance, which makes it effortless to flip the sofa seat, and then provides resistance to prevent the sofa seat from falling too quickly, thereby improving safety. A reinforcing rib 211 is integrally formed in the middle of the connecting part to improve the strength of the connecting part. The second rotating member includes an integrally formed second long arm 31 and a second short arm 32. The top end of the second long arm is pivotally connected to the rear side of the first assembly part, and the top of the second short arm is pivotally connected to the rear side of the base plate. A convex bulge 33 is formed at the intersection of the bottom ends of the second short arm and the second long arm. The outer wall of the convex bulge is coplanar with the outer wall of the first short arm, and the convex bulge is pivotally connected to the rear side of the second assembly part. A second limit pin 13 for preventing the second short arm from rotating outward is installed in the middle and rear part of the base plate.

[0019] The specific working process and principle of the utility model are as follows: when the sofa is converted into a bed, the first assembly part is flipped outward, the first assembly part drives the first long arm and the second long arm to swing outward, and the first short arm and the second short arm then hold up the second assembly part until the side wall of the second short arm hits the second limit pin, at which time the third limit pin is separated from the first limit surface and hits the second limit surface, ensuring that the sofa bed has sufficient stability in the sleeping state; when the bed is restored to a sofa, the first assembly part is flipped inward, the first assembly part drives the first long arm and the second long arm to swing inward, the first short arm and the second short arm hide the second assembly part under the first assembly part, until the outer wall of the first long arm hits the first limit pin, and the third limit pin is separated from the second limit surface and hits the first limit surface, ensuring that the sofa bed has sufficient stability in the sleeping state. The utility model improves the support force of the first assembly part in the sitting state by adjusting the connection relationship between the second rotating part and the adjacent parts, ensuring that the overall structure is more stable and reliable, and ensuring the safety of the sofa bed.

Claims

1. A folding iron frame of a sofa bed, comprising a base plate, a first rotating member, a second rotating member, a first assembly member and a second assembly member, the first rotating member comprising a connecting portion, a first long arm being arranged on one side of the connecting portion, the bottom end of the first long arm being pivotally connected to the front side of the base plate, a first stop pin for blocking the first long arm from rotating inwardly being arranged on the middle front portion of the base plate, the top end of the first long arm being pivotally connected to the front side of the first assembly member, a first short arm being arranged on the other side of the connecting portion, the top end of the first short arm being pivotally connected to the front side of the second assembly member, the second rotating member comprising an integrally formed second long arm and a second short arm, the top end of the second long arm being pivotally connected to the rear side of the first assembly member, characterized in that: The top of the second short arm is pivotally connected to the rear side of the base plate, the intersection of the bottom ends of the second short arm and the second long arm is pivotally connected to the rear side of the second assembly part, and a second limiting pin for preventing the second short arm from rotating outward is arranged at the middle rear part of the base plate.

2. The folding iron frame of the sofa bed according to claim 1, characterized in that: A third limiting pin is disposed on the top of the first long arm, and a first limiting surface and a second limiting surface cooperating with the third limiting pin are formed on the bottom of the first assembly part.

3. The folding iron frame of the sofa bed according to claim 1, characterized in that: A convex hull is provided at the intersection of the bottom ends of the second short arm and the second long arm, and the outer side wall of the convex hull is coplanar with the outer side wall of the first short arm.

4. The folding iron frame of the sofa bed according to claim 1, characterized in that: A reinforcing rib is arranged in the middle of the connecting part.

5. The folding iron frame of the sofa bed according to claim 1, characterized in that: A first hanging pin is arranged at the bottom end of the first short arm, a second hanging pin is arranged at the rear side of the base plate, and a tension spring is arranged between the first and second hanging pins.

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