Iron stand floor anti-scrub back extension assembly

Abstract

The utility model discloses an iron stand floor anti-rubbing back stretching assembly. The iron stand floor anti-rubbing back stretching assembly includes seat mechanism and the leg mechanism and backrest mechanism of seat mechanism swing joint, and backrest mechanism includes backrest mounting panel, and the front side pivot connection backrest connecting rod no.

Description

Technical Field

[0001] This utility model relates to the field of home furnishing manufacturing, and in particular to a metal frame floor anti-scratching back extension component. Background Technology

[0002] There is an existing prior application with an application date of September 8, 2025, application number 2025219210058, entitled "A Steel Frame Floor-Mounted Anti-Back Scratching Extension Component". For example... Figure 1 As shown, when the extension component enters the reclining position, the backrest mounting plate moves forward a short distance, which means there is still a risk that the backrest will hit the wall, and it cannot be guaranteed that the sofa can truly achieve zero wall contact. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a metal frame floor-standing anti-rubbing back extension component that can eliminate the risk of hitting the wall when entering a lying position, thereby truly achieving zero wall contact.

[0004] To achieve the above objectives, the technical solution adopted by the iron frame floor anti-scratching back extension component of this utility model is as follows:

[0005] A metal frame floor-standing anti-scratching back extension assembly includes a seat mechanism and a leg mechanism and a backrest mechanism movably connected to the seat mechanism. The backrest mechanism includes a backrest mounting plate, a backrest connecting rod 1 pivotally connected to the front side of the bottom of the backrest mounting plate, a backrest connecting rod 2 pivotally connected to the rear side of the bottom of the backrest mounting plate, the top end of the backrest connecting rod 2 pivotally connected to the backrest mounting plate, a backrest connecting rod 3 pivotally connected to the bottom end of the backrest connecting rod 2, the middle part of the backrest connecting rod 3 pivotally connected to the upper middle part of the backrest connecting rod 1, a backrest connecting rod 4 pivotally connected to the front end of the backrest connecting rod 3, one end of the backrest connecting rod 4 pivotally connected to the backrest connecting rod 3, and the other end pivotally connected to the backrest connecting rod 5, the middle part of the backrest connecting rod 5 pivotally connected to the backrest connecting rod 4, the rear end of the backrest connecting rod 5 pivotally connected to the lower middle part of the backrest connecting rod 1, and the front end of the backrest connecting rod 5 and the bottom end of the backrest connecting rod 1 rotatably connected to the seat mechanism.

[0006] Preferably, the lower part of the backrest mounting plate is provided with a first limiting pin, the top of the backrest connecting rod two is provided with a first limiting surface that cooperates with the first limiting pin, the middle part of the backrest connecting rod three is provided with a second limiting pin, and the backrest connecting rod one is provided with a second limiting surface that cooperates with the second limiting pin.

[0007] Preferably, the seat mechanism includes a side base rod, a front mounting member is pivotally connected to the front side of the side base rod, the bottom end of the front mounting member is pivotally connected to the side base rod, a front rotating member one is pivotally connected to the top end of the front mounting member, the bottom end of the front rotating member one is pivotally connected to the front mounting member, a seat mounting plate is pivotally connected to the top end of the front rotating member one, a leg mechanism is mounted on the front side of the seat mounting plate, the front end of the backrest link five is pivotally connected to the rear part of the seat mounting plate, a middle rotating member is pivotally connected to the middle part of the seat mounting plate, the middle part of the middle rotating member is pivotally connected to the seat mounting plate, a second front rotating member is pivotally connected to the top end of the middle rotating member, the top end of the second front rotating member is pivotally connected to the middle rotating member, and the bottom end of the second front rotating member... The end is pivotally connected to the middle of the front mounting piece. The bottom end of the middle rotating piece is pivotally connected to a side connecting rod one. The rear end of the side connecting rod one is pivotally connected to the middle rotating piece. The front end of the side connecting rod one is rotatably connected to the leg mechanism. The rear side of the side bottom rod is pivotally connected to the rear mounting piece. The bottom end of the rear mounting piece is pivotally connected to the side bottom rod. The top end of the rear mounting piece is pivotally connected to the rear rotating piece. The top end of the rear rotating piece is pivotally connected to the rear mounting piece. The front side of the bottom of the rear rotating piece is pivotally connected to the seat mounting plate. The rear side of the bottom of the rear rotating piece is pivotally connected to the backrest connecting rod five. The front side of the rear rotating piece is pivotally connected to a side connecting rod two. The rear end of the side connecting rod two is pivotally connected to the rear rotating piece. The front end of the side connecting rod two is pivotally connected to the middle of the front rotating piece one.

[0008] Preferably, the front side of the side base rod is pivotally connected to an anti-tilt linkage one, the bottom end of the anti-tilt linkage one is pivotally connected to the side base rod, the top end of the anti-tilt linkage one is pivotally connected to an anti-tilt linkage two, the top end of the anti-tilt linkage two is pivotally connected to the anti-tilt linkage one, the middle part of the anti-tilt linkage two is pivotally connected to the middle part of the front mounting part, and the front end of the anti-tilt linkage two is provided with a roller that rolls on the ground.

[0009] Preferably, a first hook is provided on the rear side of the seat mounting plate, a second hook is provided on the bottom of the rear rotating part, and a spring is provided between the first and second hooks.

[0010] Preferably, the bottom of the rear rotating component is provided with a third limiting pin, the backrest connecting rod is provided with a third limiting surface that cooperates with the third limiting pin, and the rear side of the seat mounting plate is provided with a fourth limiting surface that cooperates with the third limiting pin.

[0011] Preferably, the leg mechanism includes a leg link one and a leg link two. The rear end of leg link one is pivotally connected to the front side of the seat mounting plate, and the front end of leg link one is pivotally connected to leg link three. The rear end of leg link two is pivotally connected to the front side of the seat mounting plate, and the rear part of leg link two is pivotally connected to the front end of side link one. The front end of leg link two is pivotally connected to leg link four, and the rear part of leg link four is pivotally connected to the front part of leg link one. The front end of the fourth and third leg links is pivotally connected to the same foot rest link one. The front end of the first foot rest link is pivotally connected to the second foot rest link. The top of the second foot rest link is riveted to a large foot rest assembly plate. The front part of the second foot rest link has an arc-shaped hole, and a limiting rivet fixed to the first foot rest link is installed in the arc-shaped hole. When the top surface of the large foot rest assembly plate is pressed, the limiting rivet prevents the second foot rest link from sliding down. When the bottom surface of the large foot rest assembly plate is pressed, the second foot rest link flips outward.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] The backrest linkage four replaces the seat mounting plate and backrest linkages one, three, and five to form a quadrilateral structure, which drives the quadrilateral structure formed by backrest linkages one, two, three and the backrest mounting plate to change shape. It has a higher degree of freedom and therefore a greater range of shape changes. When the extension component enters the reclining position, it can increase the forward movement distance of the backrest mounting plate, eliminate the risk of the backrest hitting the wall, and ensure that the sofa can truly achieve zero wall contact. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the iron frame floor anti-scratching back extension component of this utility model.

[0015] Figure 2 This is a TV-style front view of the iron frame floor anti-rubbing back extension component of this utility model.

[0016] Figure 3 This is a TV-style rear view of the iron frame floor anti-rubbing back extension component of this utility model.

[0017] Figure 4 This is a front view of the iron frame floor anti-rubbing back extension component of this utility model in a lying position.

[0018] Figure 5 This is a reclining back view of the iron frame floor anti-rubbing back extension component of this utility model.

[0019] Figure 6 This is a diagram showing the folded-up state of the backrest mechanism.

[0020] Figure 7 This is a diagram showing the unfolded state of the backrest mechanism.

[0021] Figure 8 This is a structural diagram of the leg mechanism.

[0022] Figure 9 This is a comparison diagram of the present invention and a prior art application in a lying position.

[0023] Among them, 10 is the seat mechanism, 101 is the side base rod, 102 is the front mounting piece, 103 is the first front rotating part, 104 is the seat mounting plate, 1041 is the first hook pin, 1042 is the fourth limiting surface, 105 is the middle rotating part, 106 is the second front rotating part, 107 is the first side link, 108 is the first anti-tilt link, 109 is the second anti-tilt link, 110 is the roller, 111 is the rear mounting piece, 112 is the rear rotating part, 1121 is the second hook pin, 1122 is the third limiting pin, 113 is the second side link, 20 is the leg mechanism, 201 is the first leg link, 202 is the leg... Link 2, 203 Leg Link 3, 204 Leg Link 4, 205 Footrest Link 1, 2051 Limiting Rivet, 206 Footrest Link 2, 2061 Arc Hole, 207 Large Footrest Assembly Plate, 30 Backrest Mechanism, 301 Backrest Mounting Plate, 3011 First Limiting Pin, 302 Backrest Link 1, 3021 Third Limiting Surface, 3022 Second Limiting Surface, 303 Backrest Link 2, 3031 First Limiting Surface, 304 Backrest Link 3, 3041 Second Limiting Pin, 305 Backrest Link 4, 306 Backrest Link 5. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0025] like Figure 1-9As shown, a steel frame floor anti-scratching back extension assembly includes a seat mechanism 10. The seat mechanism 10 includes a side bottom rod 101. The front side of the side bottom rod 101 is pivotally connected to a front mounting member 102. The bottom end of the front mounting member 102 is pivotally connected to the side bottom rod 101. The top end of the front mounting member 102 is pivotally connected to a front rotating member 103. The bottom end of the front rotating member 103 is pivotally connected to the front mounting member 102. The top end of the front rotating member 103 is pivotally connected to a seat mounting plate 104. The front side of the seat mounting plate 104 is movably connected to a leg mechanism 20. The leg mechanism 20 includes a leg link 1 201 and a leg link 202. The rear end of the leg link 1 201 is pivotally connected to the front side of the seat mounting plate 104, and the front end of the leg link 1 201 is pivotally connected to a leg link 3 203. The leg link 202... The rear end is pivotally connected to the front side of the seat mounting plate 104. The front end of the second leg link 202 is pivotally connected to the fourth leg link 204. The rear part of the fourth leg link 204 is pivotally connected to the front part of the first leg link 201. The front ends of the fourth leg link 204 and the third leg link 203 are pivotally connected to the same footrest link 205. The front end of the first footrest link 205 is pivotally connected to the second footrest link 206. The top of the second footrest link 206 is riveted to the large footrest mounting plate 207. An arc-shaped hole 2061 is opened at the front of the second footrest link 206. A limiting rivet 2051 fixed to the first footrest link 205 is installed in the arc-shaped hole 2061. When the top surface of the large footrest mounting plate 207 is pressed, the limiting rivet 2051 prevents the second footrest link 206 from sliding down. When the bottom surface of the large footrest mounting plate 207 is pressed, the footrest... Linkage 206 flips outward to prevent hand pinching. The middle of the seat mounting plate 104 is pivotally connected to the intermediate rotating member 105. The middle of the intermediate rotating member 105 is pivotally connected to the seat mounting plate 104. The top of the intermediate rotating member 105 is pivotally connected to the front rotating member 2 106. The top of the front rotating member 2 106 is pivotally connected to the intermediate rotating member 105. The bottom of the front rotating member 2 106 is pivotally connected to the middle of the front mounting member 102. The bottom of the intermediate rotating member 105 is pivotally connected to the side link 1 107. The rear end of the side link 1 107 is pivotally connected to the intermediate rotating member 105. The front end of the side link 1 107 is pivotally connected to the rear of the leg link 202. The front side of the side bottom rod 101 is also pivotally connected to the anti-tilt link 1 108. The bottom end of the anti-tilt link 1 108 is connected to the side bottom rod 101. Pivotically connected, the top of anti-rollover linkage 108 is pivotally connected to anti-rollover linkage 109, the top of anti-rollover linkage 109 is pivotally connected to anti-rollover linkage 108, the middle of anti-rollover linkage 109 is pivotally connected to the middle of front mounting member 102, the front end of anti-rollover linkage 109 is mounted on roller 110 rolling on the ground, the rear side of side base rod 101 is pivotally connected to rear mounting member 111, the bottom end of rear mounting member 111 is pivotally connected to side base rod 101, the top of rear mounting member 111 is pivotally connected to rear rotating member 112, the top of rear rotating member 112 is pivotally connected to rear mounting member 111, the front side of rear rotating member 112 is pivotally connected to side linkage 113, the rear end of side linkage 113 is pivotally connected to rear rotating member 112, and the front end of side linkage 113 is pivotally connected to the middle of front rotating member 103.The front side of the bottom of the rear rotating member 112 is pivotally connected to the seat mounting plate 104. A first hook 1041 is installed on the rear side of the seat mounting plate 104, and a second hook 1121 is installed on the bottom of the rear rotating member 112. A spring (not shown) is installed between the first and second hooks. The spring serves to prevent disorder. The rear side of the seat mounting plate 104 is movably connected to the backrest mechanism 30. The backrest mechanism includes a backrest mounting plate 301. The front side of the bottom of the backrest mounting plate 301 is pivotally connected to a backrest connecting rod 302. The top end of the first backrest link 302 is pivotally connected to the backrest mounting plate 301, and the bottom end of the first backrest link 302 is pivotally connected to the rear rotating member 112. A third limiting pin 1122 is installed at the bottom of the rear rotating member 112. The first backrest link 302 has a third limiting surface 3021 that mates with the third limiting pin 1122. A fourth limiting surface 1042 that mates with the third limiting pin 1122 is opened on the rear side of the seat mounting plate 104. The rear side of the bottom of the backrest mounting plate 301 is pivotally connected to the second backrest link 303. The top end of the second rod 303 is pivotally connected to the backrest mounting plate 301. A first limiting pin 3011 is installed on the lower rear side of the backrest mounting plate 301. The top end of the second backrest connecting rod 303 is machined with a first limiting surface 3031 that mates with the first limiting pin 3011. The bottom end of the second backrest connecting rod 303 is pivotally connected to the third backrest connecting rod 304. The middle part of the third backrest connecting rod 304 is pivotally connected to the upper middle part of the first backrest connecting rod 302. A second limiting pin 3041 is installed in the middle of the third backrest connecting rod 302. 2. A second limiting surface 3022 is provided to cooperate with the second limiting pin 3041. The front end of the backrest link 304 is pivotally connected to the backrest link 405. One end of the backrest link 405 is pivotally connected to the backrest link 304, and the other end is pivotally connected to the backrest link 506. The middle part of the backrest link 506 is pivotally connected to the backrest link 405. The rear end of the backrest link 506 is pivotally connected to the lower middle part of the backrest link 102, and the front end of the backrest link 506 is pivotally connected to the rear side of the seat mounting plate 104.

[0026] The specific working process and principle of the iron frame floor-standing anti-rubbing back extension component of this utility model: When changing from a TV posture to a reclining posture, the leg mechanism 20 is driven by the driving force to move the seat mounting plate 104 diagonally upward. The front mounting part 102 drives the anti-tilt linkage 109 to flip forward. The roller 110 touches the ground to prevent the sofa from tipping forward due to the forward shift of the center of gravity. The quadrilateral structure composed of backrest linkages one, three, four, and five can be contracted more tightly, providing space for the backrest mounting plate 301 to move forward. At this time, the backrest mounting plate 301 moves forward and tilts backward at the same time, so that there is enough space between the backrest and the wall for the backrest to flip, thereby eliminating the collision between the backrest and the wall. The risk of collision is reduced, truly achieving zero wall contact with the sofa. To some extent, this expands the size range of the backrest, while avoiding relative displacement between the backrest and the user's back, eliminating the feeling of back rubbing, and preventing discomfort caused by the user's clothes being pulled, thereby improving the user experience. The backrest mechanism 30 fully unfolds until the third limit pin 1122 abuts against the third limit surface 3021. When changing from a reclining position to a TV position, the backrest mechanism 30 first returns to its original position under the action of the spring, until the first limit pin 3011 abuts against the first limit surface 3031, the second limit pin 3041 abuts against the second limit surface 3022, and the third limit pin 1122 abuts against the fourth limit surface 1042, at which point the backrest mechanism fully retracts.

Claims

1. A floor-standing anti-scratching back extension assembly with a metal frame, comprising a seat mechanism and a leg mechanism and a backrest mechanism movably connected to the seat mechanism, characterized in that: The backrest mechanism includes a backrest mounting plate. A backrest connecting rod 1 is pivotally connected to the front side of the bottom of the backrest mounting plate, and a backrest connecting rod 2 is pivotally connected to the rear side of the bottom of the backrest mounting plate. The top end of the backrest connecting rod 2 is pivotally connected to the backrest mounting plate, and the bottom end of the backrest connecting rod 2 is pivotally connected to the backrest connecting rod 3. The middle part of the backrest connecting rod 3 is pivotally connected to the upper middle part of the backrest connecting rod 1. The front end of the backrest connecting rod 3 is pivotally connected to the backrest connecting rod 4. One end of the backrest connecting rod 4 is pivotally connected to the backrest connecting rod 3, and the other end is pivotally connected to the backrest connecting rod 5. The middle part of the backrest connecting rod 5 is pivotally connected to the backrest connecting rod 4, and the rear end of the backrest connecting rod 5 is pivotally connected to the lower middle part of the backrest connecting rod 1. The front end of the backrest connecting rod 5 and the bottom end of the backrest connecting rod 1 are rotatably connected to the seat mechanism.

2. The iron frame floor anti-scratching back extension component according to claim 1, characterized in that: The lower part of the backrest mounting plate is provided with a first limiting pin, the top of the backrest connecting rod two is provided with a first limiting surface that cooperates with the first limiting pin, the middle part of the backrest connecting rod three is provided with a second limiting pin, and the backrest connecting rod one is provided with a second limiting surface that cooperates with the second limiting pin.

3. The iron frame floor anti-scratching back extension component according to claim 1, characterized in that: The seat mechanism includes a side base rod, a front mounting member is pivotally connected to the front side of the side base rod, the bottom end of the front mounting member is pivotally connected to the side base rod, a front rotating member (first) is pivotally connected to the top end of the front mounting member, the bottom end of the first front rotating member is pivotally connected to the front mounting member, a seat mounting plate is pivotally connected to the top end of the first front rotating member, a leg mechanism is mounted on the front side of the seat mounting plate, the front end of a backrest link (fifth) is pivotally connected to the rear of the seat mounting plate, a middle rotating member is pivotally connected to the middle of the seat mounting plate, the middle part of the middle rotating member is pivotally connected to the seat mounting plate, a second front rotating member is pivotally connected to the top end of the middle rotating member, the top end of the second front rotating member is pivotally connected to the middle rotating member, and the bottom end of the second front rotating member is pivotally connected to the middle rotating member. The middle of the front mounting piece is connected to the middle rotating piece. The bottom end of the middle rotating piece is pivotally connected to a side connecting rod 1. The rear end of the side connecting rod 1 is pivotally connected to the middle rotating piece. The front end of the side connecting rod 1 is rotatably connected to the leg mechanism. The rear side of the side bottom rod is pivotally connected to the rear mounting piece. The bottom end of the rear mounting piece is pivotally connected to the side bottom rod. The top end of the rear mounting piece is pivotally connected to the rear rotating piece. The top end of the rear rotating piece is pivotally connected to the rear mounting piece. The front side of the bottom of the rear rotating piece is pivotally connected to the seat mounting plate. The rear side of the bottom of the rear rotating piece is pivotally connected to the backrest connecting rod 5. The front side of the rear rotating piece is pivotally connected to a side connecting rod 2. The rear end of the side connecting rod 2 is pivotally connected to the rear rotating piece. The front end of the side connecting rod 2 is pivotally connected to the middle of the front rotating piece 1.

4. The iron frame floor anti-scratching back extension component according to claim 3, characterized in that: The front side of the side base rod is pivotally connected to an anti-tilt linkage 1. The bottom end of the anti-tilt linkage 1 is pivotally connected to the side base rod. The top end of the anti-tilt linkage 1 is pivotally connected to an anti-tilt linkage 2. The top end of the anti-tilt linkage 2 is pivotally connected to the anti-tilt linkage 1. The middle part of the anti-tilt linkage 2 is pivotally connected to the middle part of the front mounting component. The front end of the anti-tilt linkage 2 is provided with a roller that rolls on the ground.

5. The iron frame floor anti-scratching back extension component according to claim 3, characterized in that: A first hook is provided on the rear side of the seat mounting plate, and a second hook is provided on the bottom of the rear rotating part. A spring is provided between the first and second hooks.

6. The iron frame floor anti-scratching back extension component according to claim 5, characterized in that: The bottom of the rear rotating component is provided with a third limiting pin, the backrest connecting rod is provided with a third limiting surface that cooperates with the third limiting pin, and the rear side of the seat mounting plate is provided with a fourth limiting surface that cooperates with the third limiting pin.

7. The iron frame floor anti-scratching back extension component according to claim 3, characterized in that: The leg mechanism includes a leg link one and a leg link two. The rear end of leg link one is pivotally connected to the front side of the seat mounting plate, and the front end of leg link one is pivotally connected to leg link three. The rear end of leg link two is pivotally connected to the front side of the seat mounting plate, and the rear part of leg link two is pivotally connected to the front end of side link one. The front end of leg link two is pivotally connected to leg link four, and the rear part of leg link four is pivotally connected to the front part of leg link one. Leg link four and... The front end of the leg link three is pivotally connected to the same foot rest link one, and the front end of the foot rest link one is pivotally connected to the foot rest link two. The top of the foot rest link two is riveted to a large foot rest assembly plate. The front part of the foot rest link two has an arc-shaped hole, and a limiting rivet fixed to the foot rest link one is set in the arc-shaped hole. When the top surface of the large foot rest assembly plate is pressed, the limiting rivet prevents the foot rest link two from sliding down. When the bottom surface of the large foot rest assembly plate is pressed, the foot rest link two flips outward.

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