Three-folding bed sofa iron stand

Abstract

The utility model discloses a three-folding bed sofa iron stand. The three-folding bed sofa iron stand comprises a first base and a second base which are symmetrical, a folding mechanism is arranged between the first base and the second base, the folding mechanism comprises a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are pivoted with the first base, the other end of the first connecting rod and the other end of the second connecting rod are pivoted with a first sofa seat assembly part, and a third connecting rod is arranged in the middle of the first connecting rod. A boss is arranged in the middle of the second connecting rod, the boss and the third connecting rod are jointly pivoted with a second sofa seat assembly part, the second connecting rod is connected with a fourth connecting rod, the other end of the fourth connecting rod is pivoted with a fifth connecting rod, the bottom of the fifth connecting rod is pivoted with a roller sliding in the groove-shaped guide rail, and a backrest assembly part is arranged on the side wall of the fifth connecting rod; the front side of the backrest assembly part is fixedly connected with the fifth connecting rod, the rear side of the backrest assembly part is provided with a sixth connecting rod, and the other end of the sixth connecting rod is pivoted with the second base. According to the utility model, the problem of high manufacturing cost in the prior art is solved.

Description

Technical Field

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

[0002] The existing publication number CN220360264U discloses a "three-fold sofa bed with zero wall support", and the disclosed folding assembly involves many parts, resulting in a high production cost. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a tri-fold sofa bed iron frame with low manufacturing cost.

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

[0005] A three-fold sofa iron frame comprises two symmetrical first bases and a second base, a folding mechanism is arranged between the first and second bases, the folding mechanism comprises a first connecting rod and a second connecting rod, one end of the first and second connecting rods is pivotally connected to the first base, and the other end is pivotally connected to a first sofa seat assembly part, a third connecting rod is arranged in the middle of the first connecting rod, a boss is arranged in the middle of the second connecting rod, the boss and the third connecting rod are jointly pivotally connected to a second sofa seat assembly part, the second connecting rod is connected to a fourth connecting rod, one end of the fourth connecting rod is pivotally connected to the middle of the second connecting rod, and the other end is pivotally connected to a fifth connecting rod, the bottom of the fifth connecting rod is pivotally connected to a roller sliding in a groove guide rail, a side wall of the fifth connecting rod is arranged with a backrest assembly part, the front side of the backrest assembly part is fixedly connected to the fifth connecting rod, a sixth connecting rod is arranged on the rear side of the backrest assembly part, one end of the sixth connecting rod is pivotally connected to the backrest assembly part, and the other end is pivotally connected to the second base, and the second base is located below the tail end of the groove guide rail.

[0006] Preferably, the first sofa seat assembly is provided with a first limiting pin on the front side of the connection point with the first connecting rod, and the second limiting pin is provided on the rear side of the connection point between the first sofa seat assembly and the first connecting rod.

[0007] Preferably, the backrest assembly is provided with a third limit pin, and the sixth connecting rod is provided with a limit surface cooperating with the third limit pin.

[0008] Preferably, a first tension spring is arranged between the tail of the first base and the tail of the first connecting rod, and a second tension spring is arranged between the front side of the sixth connecting rod and the bottom of the fifth connecting rod.

[0009] Preferably, a first support rod is arranged between the first connecting rods on both sides, and a second support rod is arranged between the fourth connecting rods on both sides.

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

[0011] A boss is formed in the middle of the second connecting rod for pivotally connecting the second sofa seat assembly, eliminating the U-shaped part with a more complex structure and simplifying the assembly process, which is beneficial to reducing costs, reducing the cumulative error caused by assembly, and improving the assembly accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the iron frame of the tri-fold bed sofa of the utility model;

[0013] Figure 2 It is a front view of the folding component in the unfolded state;

[0014] Figure 3 is a back view of the folding assembly in an unfolded state;

[0015] Figure 4 is a front view of the folding component in a folded state;

[0016] Figure 5 It is a back view of the folding component in the folded state.

[0017] Among them, 1 is a first base, 2 is a second base, 3 is a folding mechanism, 31 is a first connecting rod, 32 is a second connecting rod, 32 is a boss, 33 is a first sofa seat assembly, 331 is a first limiting pin, 332 is a second limiting pin, 34 is a third connecting rod, 35 is a second sofa seat assembly, 36 is a fourth connecting rod, 37 is a fifth connecting rod, 37 is a roller, 38 is a backrest assembly, 381 is a third limiting pin, 39 is a sixth connecting rod, 391 is a limiting surface, 4 is a groove guide rail, 5 is a hanging pin, 6 is a first support rod, 7 is a first right-angle piece, 8 is a second support rod, and 9 is a second right-angle piece. DETAILED DESCRIPTION

[0018] 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.

[0019] like Figure 1-5As shown, a three-fold sofa bed iron frame includes two symmetrical first bases 1 and second bases 2, a folding mechanism 3 is installed between the first and second bases, and the folding mechanism includes a first connecting rod 31 and a second connecting rod 32. The tail of the first connecting rod is pivotally connected to the front side of the first base, and the front end of the first connecting rod is pivotally connected to the middle of a first sofa seat assembly 33. The first sofa seat assembly is located at the front side of the connection point between the first connecting rod and the first connecting rod. The first sofa seat assembly is located at the rear side of the connection point between the first connecting rod and the first connecting rod. The third connecting rod is installed in the middle of the first connecting rod. The connecting rod 34, the tail end of the second connecting rod is pivoted to the middle of the first base, the front end of the second connecting rod is pivoted to the rear side of the first sofa seat assembly, the middle part of the second connecting rod is stamped with a boss 321, the boss and the third connecting rod are jointly pivoted to the second sofa seat assembly 35, the second connecting rod is connected to the fourth connecting rod 36, the front end of the fourth connecting rod is pivoted to the middle of the second connecting rod, and the rear end is pivoted to the fifth connecting rod 37, the bottom of the fifth connecting rod is pivoted to the roller 371 sliding in the groove guide rail 4, the side wall of the fifth connecting rod is fixed to the backrest assembly 38, the front side of the backrest assembly is fixed to the fifth connecting rod, and the backrest assembly A sixth connecting rod 39 is installed on the rear side, the front end of the sixth connecting rod is pivotally connected to the backrest assembly, and the rear end is pivotally connected to the second base, the second base is located below the tail end of the grooved guide rail, the first and second bases and the grooved guide rail are all installed on the sofa seat, the third limiting pin 381 is installed on the rear side of the backrest assembly, the sixth connecting rod is provided with a limiting surface 391 that cooperates with the third limiting pin, a first tension spring (not shown) is arranged between the tail of the first base and the tail of the first connecting rod, and the two ends of the first tension spring are respectively installed between the tail of the first base and the tail of the first connecting rod through the hanging pin 5, and the front side of the sixth connecting rod A second tension spring (not shown) is arranged between the bottom of the fifth connecting rod, and both ends of the second tension spring are respectively installed between the front side of the sixth connecting rod and the bottom of the fifth connecting rod through a hanging pin. A first support rod 6 is arranged between the first connecting rods on both sides, and both ends of the first support rod are fixedly connected to the first connecting rod through a first right-angle piece 7. A second support rod 8 is arranged between the fourth connecting rods on both sides, and both ends of the second support rod are fixedly connected to the second connecting rod through a second right-angle piece 9. The first and second support rods can not only improve the strength of the iron frame of the tri-fold bed sofa, but also improve the synchronization of the actions on both sides of the iron frame of the tri-fold bed sofa.

[0020] The specific working process and principle of the utility model are as follows: when the sofa is converted into a bed, the first sofa seat assembly is flipped outward, the first sofa seat assembly drives the first and second connecting rods to swing outward, the third and fourth connecting rods then lift up the second sofa seat assembly, and at the same time the fourth connecting rod pulls the fifth connecting rod, the fifth connecting rod pulls the backrest assembly, the roller slides forward in the groove guide rail, and at the same time the first and second tension springs are stretched to provide a certain resistance, so that the first sofa seat assembly can fall smoothly with high safety, until the backrest assembly is flattened and spliced ​​with the first and second sofa seat assemblies to form a bed, at this time the inner side wall of the first connecting rod contacts the second limit pin, thereby increasing the supporting force of the first sofa seat assembly in the sleeping position, and the third limit pin contacts the limit surface , improve the supporting force of the backrest assembly when in a sleeping position; when the bed is restored to a sofa, flip the first sofa seat assembly inward, the first sofa seat assembly drives the first and second connecting rods to swing inward, the third and fourth connecting rods swing inward to drive the second sofa seat assembly to reset, the fourth connecting rod pushes the backrest assembly through the fifth connecting rod, the roller moves backward in the groove guide rail, the tail end of the backrest assembly tilts upward under the action of the sixth connecting rod, and the first and second tension springs contract to provide assistance for the first and second sofa seat assemblies to flip backward without effort until they are completely reset, at which time the first limit pin abuts against the outer wall of the first connecting rod, and the second limit pin abuts against the outer wall of the second connecting rod, thereby improving the supporting force of the first sofa seat assembly when in a sitting position. The utility model optimizes the structure on the basis of the prior art, reduces the number of parts, simplifies the assembly process, is conducive to reducing costs, and is also conducive to reducing the cumulative errors caused by assembly, thereby improving the assembly accuracy of the product.

Claims

1. A three-fold sofa bed iron frame, comprising two symmetrical first bases and a second base, a folding mechanism is arranged between the first and second bases, the folding mechanism comprises a first connecting rod and a second connecting rod, one end of the first and second connecting rods is pivotally connected to the first base, and the other end is pivotally connected to a first sofa seat assembly, a third connecting rod is arranged in the middle of the first connecting rod, and the characteristics are: A boss is provided in the middle of the second connecting rod, and the boss and the third connecting rod are jointly pivotally connected to a second sofa seat assembly. The second connecting rod is connected to a fourth connecting rod, one end of the fourth connecting rod is pivotally connected to the middle of the second connecting rod, and the other end is pivotally connected to a fifth connecting rod, and the bottom of the fifth connecting rod is pivotally connected to a roller that slides in the groove guide rail, a backrest assembly is provided on the side wall of the fifth connecting rod, the front side of the backrest assembly is fixedly connected to the fifth connecting rod, and a sixth connecting rod is provided on the rear side of the backrest assembly, one end of the sixth connecting rod is pivotally connected to the backrest assembly, and the other end is pivotally connected to the second base, and the second base is located below the tail end of the groove guide rail.

2. The tri-fold sofa bed iron frame according to claim 1, characterized in that: The first sofa seat assembly is provided with a first limiting pin on the front side of the connection point with the first connecting rod, and the second limiting pin is provided on the rear side of the connection point between the first sofa seat assembly and the first connecting rod.

3. The tri-fold sofa bed iron frame according to claim 1, characterized in that: The backrest assembly is provided with a third limiting pin, and the sixth connecting rod is provided with a limiting surface matched with the third limiting pin.

4. The tri-fold sofa bed iron frame according to claim 1, characterized in that: A first tension spring is arranged between the tail of the first base and the tail of the first connecting rod, and a second tension spring is arranged between the front side of the sixth connecting rod and the bottom of the fifth connecting rod.

5. The tri-fold sofa bed iron frame according to claim 1, characterized in that: A first supporting rod is arranged between the first connecting rods on both sides, and a second supporting rod is arranged between the fourth connecting rods on both sides.

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