Functional sofa iron stand convenient to transport

Abstract

The invention discloses a functional sofa iron stand convenient to transport. The functional sofa iron stand convenient to transport comprises a base, a stretching device is arranged on the base, the stretching device comprises a leg mechanism, a seat mechanism and a backrest mechanism, the leg mechanism comprises a multi-connecting-rod structure, the multi-connecting-rod structure is connected with a main footrest support, and the main footrest support is slidably connected with a main footrest mounting plate; the backrest mechanism comprises a first backrest linkage rod and a second backrest linkage rod, the top of the first backrest linkage rod is in pivot joint with a first backrest supporting rod, the bottom of the first backrest supporting rod is in pivot joint with the tail of the second backrest linkage rod through a first shaft, and the second backrest supporting rod is arranged between the second backrest linkage rod and the first backrest supporting rod. A long round hole for the first shaft to slide is formed in the lower portion of the second backrest supporting rod, and a third backrest linkage rod is arranged at the top of the first backrest supporting rod and the top of the second backrest supporting rod and movably connected with the backrest mounting plate. The problems that in the prior art, due to the fact that the occupied three-dimensional space is large, the packing number is small, and the transportation cost is high are solved.

Description

Technical Field

[0001] The invention relates to the field of home furnishing manufacturing, and in particular to a functional sofa iron frame that is easy to transport. Background Art

[0002] The existing Chinese utility model patent with publication number CN203468044U and titled "An Electric Swinging Mechanical Extension Device" consists of a leg structure, a driving part, a seat structure and a back structure. The backrest mounting bracket in the backrest mechanism is used to install the backrest, but the top of the installed backrest will be higher than the armrest, so that the functional sofa occupies a large three-dimensional space, resulting in a small number of functional sofas in packaging and high transportation costs. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a functional sofa iron frame which has the advantages of large packing quantity, low transportation cost and is easy to transport.

[0004] To achieve the above purpose, the technical solution adopted by the functional sofa iron frame that is easy to transport of the present invention is:

[0005] The utility model discloses a functional sofa iron frame which is easy to transport, comprising a base, on which an extension device is arranged, the extension device comprising a leg mechanism, a seat mechanism and a backrest mechanism, the leg mechanism comprising a multi-link structure connected with the seat mechanism, the multi-link structure being connected with a main footrest bracket, the main footrest bracket being slidably connected with a main footrest mounting plate, the backrest mechanism comprising a backrest linkage rod 1 and a backrest linkage rod 2 connected with the seat mechanism, the top of the backrest linkage rod 1 being pivotally connected with a backrest support rod 1, the bottom of the backrest support rod 1 being pivotally connected to the tail of the backrest linkage rod 2 through a first axis, a backrest support rod 2 being arranged between the backrest linkage rod 2 and the backrest support rod 1, an oblong hole for sliding of the first axis being opened at the lower part of the backrest support rod 2, a backrest linkage rod 3 being arranged at the top of the backrest support rods 1 and 2, and the backrest linkage rod 3 being movably connected with the backrest mounting plate.

[0006] Preferably, the main footrest bracket includes a plate member 1 connected to the multi-link structure, and the plate member 1 is fixedly connected to a plate member 2 which is slidably connected to the main footrest mounting plate.

[0007] Preferably, the main footrest mounting plate is provided with a guide slide groove, and the second plate is provided with at least two guide slide pins inserted into the guide slide groove.

[0008] Preferably, a return spring is provided between the main footrest mounting plate and plate member 1.

[0009] Preferably, the multi-link structure includes a leg link one and a leg link two, the front end of the leg link one is pivoted to the tail of the panel one, the rear end of the leg link one is pivoted to the leg link three, the front end of the leg link two is pivoted to the tail of the panel one, the rear end of the leg link two is pivoted to the leg link four, the front end of the leg link four is pivoted to the rear end of the leg link one, and the tail ends of the leg links three and four are pivoted to the seat mechanism.

[0010] Preferably, the leg connecting rod 1 is provided with a limit pin, and the leg connecting rod 4 is provided with a folding limit surface and an unfolding limit surface cooperating with the limit pin.

[0011] Preferably, the backrest linkage rod three and the backrest mounting plate are pivotally connected via a second axis, and at least one bolt assembly is provided to cooperate with a fifth axis to fix the backrest linkage rod three and the backrest mounting plate.

[0012] Preferably, a sleeve or a bearing is sleeved on the outer side of the first shaft, and the distance between the two straight sides of the oblong hole matches the outer diameter of the sleeve or the bearing.

[0013] Preferably, one end of the shaft sleeve or the bearing contacts the second backrest linkage rod, and the other end protrudes from the oblong hole and contacts the first backrest support rod.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The original backrest mounting bracket is split into three backrest linkage rods and a backrest mounting plate, which are movably connected. When packing, the backrest can be laid down first to reduce the three-dimensional space occupied by the functional sofa, thereby increasing the number of packing and reducing transportation costs. At the same time, in order to allow the backrest to have more flipping space, the three-dimensional space occupied by the functional sofa is further compressed, and the height of the seat cushion is reduced. After the height of the seat cushion is reduced, the length of the fabric used to connect the main footrest and the seat cushion is also shortened. When the leg mechanism is opened, the fabric will pull the main footrest mounting plate to slide backward on the main footrest bracket. Under the condition that the fabric is not damaged, the leg mechanism can be opened normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a packing schematic diagram of a functional sofa iron frame that is easy to transport according to the present invention.

[0017] Figure 2 The present invention is a sitting posture diagram of a functional sofa iron frame that is easy to transport.

[0018] Figure 3 The utility model is a lying state diagram of the functional sofa iron frame which is easy to transport according to the present invention.

[0019] Figure 4 This is the unfolded state diagram of the leg mechanism.

[0020] Figure 5This is a diagram of the leg mechanism in the folded state.

[0021] Figure 6 It is a structural diagram of a multi-link structure.

[0022] Figure 7 It is a structural diagram of the backrest mechanism.

[0023] Figure 8 It is a schematic diagram of the assembly of the backrest linkage rod 2 and the backrest support rods 1 and 2.

[0024] Among them, 1 base, 2 extension device, 21 leg mechanism, 211 multi-link structure, 2111 leg link 1, 2112 leg link 2, 2113 leg link 3, 2114 leg link 4, 2115 limit pin, 2116 folding limit surface, 2117 unfolding limit surface, 212 auxiliary footrest mounting plate, 213 main footrest bracket, 2131 plate 1, 2132 plate 2, 2133 guide pin, 2134 hanging pin, 214 main footrest mounting plate, 2141 guide groove, 2142 through hole, 215 return spring, 22 seat mechanism, 23 backrest mechanism, 231 backrest linkage rod one, 232 backrest linkage rod two, 233 backrest support rod one, 234 first axis, 235 backrest support rod two, 2351 oblong hole, 236 bushing, 237 backrest linkage rod three, 238 backrest mounting plate, 239 second axis. DETAILED DESCRIPTION

[0025] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments 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.

[0026] like Figure 1-8As shown, a functional sofa iron frame that is easy to transport includes a base 1, which is a turntable type, and an extension device 2 is installed on the base. The extension device includes a leg mechanism 21, a seat mechanism 22 and a backrest mechanism 23. The seat mechanism is a prior art, and reference can be made to the Chinese utility model patent document with publication number CN203468044U and the name "An Electric Belt Swing Mechanical Extension Device". The leg mechanism includes a multi-link structure 211, and the multi-link structure includes a leg link 1 2111 and a leg link 2 2112. The rear end of the leg link 1 is pivotally connected to the leg link 3 2113, the middle part of the leg link 1 is pivotally connected to the auxiliary footrest mounting plate 212, the tail of the auxiliary footrest mounting plate is pivotally connected to the leg link 2, and the rear end of the leg link 2 is pivotally connected to the leg The rear ends of the leg links 3 and 4 are pivotally connected to the seat mechanism, the front end of the leg link 4 is pivotally connected to the rear end of the leg link 1, a limit pin 2115 is installed in the middle of the leg link 1, and the leg link 4 is provided with a folding limit surface 2116 and an unfolding limit surface 2117 that cooperate with the limit pin. The front ends of the leg links 1 and 2 are connected to the main footrest bracket 213, and the main footrest bracket includes a plate 1 2131, and the rear ends of the plate 1 are respectively pivotally connected to the leg links 1 and 2, the front end of the plate 1 is fixedly connected to the plate 2132, and the plate 2 is slidably connected to the main footrest mounting plate 214, and the main footrest mounting plate is provided with a guide slot 2141, and the plate 2 is provided with two guide pins 2133 inserted into the guide slot, and the spacing between the two guide pins is smaller than that of the guide slot. The guide pin has both a sliding guide and a limiting function to prevent the main footrest mounting plate and the second plate from slipping off. A hanging pin 2134 is installed at the front end of the first plate, and a through hole 2142 is provided on the main footrest mounting plate. A reset spring 215 is installed between the through hole and the hanging pin. The backrest mechanism includes a backrest linkage rod 1 231 and a backrest linkage rod 232 pivotally connected to the seat mechanism. The top of the backrest linkage rod 1 is pivotally connected to the backrest support rod 1 233. The bottom of the backrest support rod 1 is pivotally connected to the tail of the backrest linkage rod 2 through the first axis 234. A backrest support rod 235 is installed between the backrest linkage rod 2 and the backrest support rod 1. An oblong hole 2351 for sliding of the first axis is provided at the lower part of the backrest support rod 2. The outer side of the first axis is connected to the shaft sleeve 236. The two straight sides of the oblong hole The distance matches the outer diameter of the sleeve. The sleeve is an oil-free engineering plastic sleeve, which can avoid mutual wear between the first shaft and the side wall of the oblong hole, and also plays a role in reducing noise. One end of the sleeve contacts the backrest linkage rod 2, and the other end protrudes from the oblong hole and contacts the backrest support rod 1. Similarly, the sleeve separates the backrest support rod 1 and the backrest support rod 2 to avoid mutual wear between the two, which also plays a role in reducing noise. The tops of the backrest support rods 1 and 2 are pivotally connected to the backrest linkage rod 3 237, and the backrest linkage rod 3 is movably connected to the backrest mounting plate 238. The backrest linkage rod 3 and the backrest mounting plate are pivotally connected through the second shaft 239, and are configured with two bolt assemblies. The two bolt assemblies are located on both sides of the second shaft, and cooperate with the second shaft to fix the backrest linkage rod 3 and the backrest mounting plate.

[0027] The specific working process and principle of the functional sofa iron frame that is easy to transport of the present invention are as follows: when packing the functional sofa, the bolt assemblies on both sides of the second axis are removed, and the backrest is turned toward the cushion, which reduces the three-dimensional space occupied by the functional sofa, thereby increasing the number of packings and reducing the transportation cost. When arriving at the customer's place, the backrest is flipped up, and the backrest linkage rod 3 and the backrest mounting plate are connected into a whole by the bolt assembly to keep the backrest in use. When the functional sofa needs to open the leg mechanism, the multi-link structure is extended to the front side by the driving force, driving the main footrest bracket and the main footrest mounting plate to flip outward, and the main footrest mounting plate is subjected to the relative tension of the fabric, overcomes the tension of the reset spring, and moves relative to the plate 2 along the two guide pins, without affecting the expansion of the main footrest bracket; when folding, the multi-link structure is contracted to the rear side by the driving force, driving the main footrest bracket and the main footrest mounting plate to flip inward, and the main footrest mounting plate is reset by the tension of the reset spring.

[0028] The present invention splits the original backrest mounting bracket into a backrest linkage rod and a backrest mounting plate, which are movably connected so that the backrest can be flipped, reducing the three-dimensional space occupied by the functional sofa, increasing the packing volume of the functional sofa, and reducing the transportation cost. The present invention also makes the main footrest mounting plate flexible by slidingly connecting the main footrest mounting plate and the main footrest bracket, thereby solving the problem of affecting the unfolding of the leg structure after the length of the fabric is shortened, providing a basis for reducing the height of the seat cushion. When the height of the seat cushion is reduced, the flipping space of the backrest is increased, which can further compress the three-dimensional space occupied by the functional sofa, and the packing volume of the functional sofa is larger, and the transportation cost is lower.

Claims

1. A functional sofa iron frame that is easy to transport, comprising a base, on which is provided an extension device, the extension device comprising a leg mechanism, a seat mechanism and a backrest mechanism, characterized in that: The leg mechanism includes a multi-link structure connected to the seat mechanism, the multi-link structure is connected to a main footrest bracket, the main footrest bracket is slidably connected to a main footrest mounting plate, the backrest mechanism includes a backrest linkage rod 1 and a backrest linkage rod 2 connected to the seat mechanism, the top of the backrest linkage rod 1 is pivotally connected to a backrest support rod 1, the bottom of the backrest support rod 1 is pivotally connected to the tail of the backrest linkage rod 2 through a first axis, a backrest support rod 2 is arranged between the backrest linkage rod 2 and the backrest support rod 1, an oblong hole for sliding the first axis is opened at the lower part of the backrest support rod 2, a backrest linkage rod 3 is arranged on the top of the backrest support rods 1 and 2, and the backrest linkage rod 3 is movably connected to the backrest mounting plate.

2. The main footrest retractable leg mechanism according to claim 1, characterized in that: The main footrest bracket includes a plate member 1 connected to the multi-link structure, and the plate member 1 is fixedly connected to a plate member 2 which is slidably connected to the main footrest mounting plate.

3. The main footrest retractable leg mechanism according to claim 2, characterized in that: The main footrest mounting plate is provided with a guide slide groove, and the second plate is provided with at least two guide slide pins inserted into the guide slide groove.

4. The main footrest retractable leg mechanism according to claim 3, characterized in that: A return spring is arranged between the main footrest mounting plate and the first plate.

5. The main footrest retractable leg mechanism according to claim 2, characterized in that: The multi-link structure includes a leg link 1 and a leg link 2, the front end of the leg link 1 is pivotally connected to the tail of the plate 1, the rear end of the leg link 1 is pivotally connected to the leg link 3, the front end of the leg link 2 is pivotally connected to the tail of the plate 1, the rear end of the leg link 2 is pivotally connected to the leg link 4, the front end of the leg link 4 is pivotally connected to the rear end of the leg link 1, and the tail ends of the leg links 3 and 4 are pivotally connected to the seat mechanism.

6. The main footrest retractable leg mechanism according to claim 5, characterized in that: The leg connecting rod 1 is provided with a limit pin, and the leg connecting rod 4 is provided with a folding limit surface and an unfolding limit surface which cooperate with the limit pin.

7. The reclining backrest mechanism according to claim 1, characterized in that: The backrest linkage rod three and the backrest mounting plate are pivotally connected via a second shaft, and at least one bolt assembly is provided to cooperate with a fifth shaft to fix the backrest linkage rod three and the backrest mounting plate.

8. The reclining backrest mechanism according to claim 1, characterized in that: The outer side of the first shaft is sleeved with a shaft sleeve or a bearing, and the distance between the two straight sides of the oblong hole matches the outer diameter of the shaft sleeve or the bearing.

9. The reclining backrest mechanism according to claim 8, characterized in that: One end of the shaft sleeve or the bearing contacts the second backrest linkage rod, and the other end protrudes from the oblong hole and contacts the first backrest support rod.

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