A detachable three-position sofa

Abstract

The utility model discloses a detachable three -position sofa. The detachable three -position sofa includes seat frame, back, footboard and a pair of handrail frame, the handrail frame includes U type pipe and side rod, and side rod installs in U type pipe opening one side, and the part of U type pipe opening end protruding in side rod constitutes the support foot, and the inner wall of side rod is provided with first connecting piece, and first connecting piece is detachably connected with the mechanical stretching subassembly that can switch among sitting posture, TV posture and lying posture, and the seat frame, back, footboard and mechanical stretching subassembly are detachably connected. The utility model solves the problem that prior art can not satisfy user's use demand.

Description

Technical Field

[0001] This utility model relates to the field of furniture manufacturing, and in particular to a detachable three-position sofa. Background Technology

[0002] A Chinese utility model patent with publication number CN221307728U, entitled "A Detachable Electric Sofa," describes a modular, detachable assembly where the seat frame, side frame, telescopic components, leg panels, drive mechanism, and backrest are detachably connected, reducing packaging volume and increasing packing capacity. However, the disclosed telescopic components only allow switching between sitting and reclining positions, lacking the ability to achieve a TV-like posture, thus failing to meet user needs. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a detachable three-position sofa that can both increase the packing capacity and reduce transportation costs, and meet the user's needs.

[0004] To achieve the above objectives, the technical solution adopted by the detachable three-position sofa of this utility model is as follows:

[0005] A detachable three-position sofa includes a seat frame, a backrest, a footboard, and a pair of armrests. The armrests include a U-shaped tube and side rods. The side rods are installed on one side of the opening of the U-shaped tube. The part of the opening of the U-shaped tube protruding from the side rod forms a support foot. The inner wall of the side rod is provided with a first connector. The first connector is detachably connected to a mechanical extension component that can switch between sitting, TV, and reclining positions. The seat frame, backrest, footboard, and mechanical extension component are detachably connected.

[0006] Preferably, the mechanical extension assembly includes a leg mechanism, a seat mechanism, and a backrest mechanism. The seat mechanism includes a side mounting plate detachably connected to a first connecting member. A seat link 1 is pivotally connected to the front side of the side mounting plate. A seat link 2 is pivotally connected to the front end of seat link 1. A seat link 3 is pivotally connected to the front end of seat link 2. A seat link 4 is pivotally connected to the rear end of seat link 3. A seat mounting plate for mounting a seat frame is provided on the inner side wall of seat link 4. A seat link 5 is pivotally connected to the rear side of seat link 4. The top end of seat link 5 is pivotally connected to seat link 4. A seat link 6 is pivotally connected to the middle of seat link 5. The rear end of seat link 6 is pivotally connected to seat link 5. A groove is provided at the front end of seat link 6. A pin for inserting into the groove is provided on the front side of the side mounting plate. A seat link 7 is pivotally connected to the middle of seat link 6. The rear end of seat link 7 is pivotally connected to the rear side of the side mounting plate. The front end of seat link 7 is pivotally connected to the seat frame. In the middle of the chair link three, the leg mechanism includes leg link one and leg link two. The tail end of leg link one is pivotally connected to the front end of seat link four, and leg link three is pivotally connected to the front end of leg link one. The tail end of leg link two is pivotally connected to the front end of seat link three, the middle part of leg link two is pivotally connected to the middle part of leg link one, and leg link four is pivotally connected to the front end of leg link two. The middle part of leg link four is pivotally connected to the middle part of leg link three. The front end is pivotally connected to a leg link five, and the front end of the leg link five is pivotally connected to a footrest mounting plate for mounting a footboard. The rear end of the footrest mounting plate is pivotally connected to the front end of the leg link three. The backrest mechanism includes a backrest mounting plate pivotally connected to the rear end of the seat link four. The backrest is detachably connected to the backrest mounting plate via a snap fastener. The backrest mounting plate is pivotally connected to a backrest support rod. The top end of the backrest support rod is pivotally connected to the backrest mounting plate, and the bottom end of the backrest support rod is pivotally connected to the rear end of the side mounting plate.

[0007] Preferably, the seat mounting plate is provided with second connectors for mounting the seat frame at both the front and rear ends.

[0008] Preferably, the inner side of the side mounting plate is provided with a first limiting pin, a second limiting pin and a third limiting pin in sequence from front to back; the seat link seven has a first limiting surface that cooperates with the first limiting pin; the seat link six has a second limiting surface that cooperates with the second limiting pin; the seat link five has a third limiting surface that cooperates with the third limiting pin; the rear side of the seat link four is provided with a fourth limiting pin; and the seat link five has a fourth limiting surface that cooperates with the fourth limiting pin.

[0009] Preferably, the side mounting plate has positioning slots on both the front and rear sides for assembly with the first connecting member.

[0010] Preferably, a fifth limiting pin is provided on the front side of the leg link three, and a fifth limiting surface that cooperates with the fifth limiting pin is provided on the foot rest mounting plate.

[0011] Preferably, it also includes a front crossbar and a rear crossbar. The two ends of the front crossbar are provided with third connectors, and the front crossbar is detachably connected to the bottom front side of the two U-shaped tubes through the third connectors. The two ends of the rear crossbar are provided with fourth connectors, and the rear crossbar is detachably connected to the lower middle rear side of the two U-shaped tubes through the fourth connectors.

[0012] Preferably, a diagonal brace is provided between the bottom surface of the side rod and the support foot.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. A mechanical extension component that can be detachably connected via the first connector to switch between sitting, TV-like, and reclining positions is provided to meet user needs. The mechanical extension component itself is also a modular part, so it will not affect the packing quantity and thus reduce shipping costs.

[0015] 2. The stability of the armrest frame is improved by using front and rear crossbars. The front crossbar is installed at the bottom front of the U-shaped tubes on both sides, so as not to affect the unfolding of the leg mechanism. The rear crossbar is installed at the lower middle part of the rear side of the U-shaped tubes on both sides, so as not to affect the unfolding of the backrest mechanism. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the detachable three-position sofa of this utility model.

[0017] Figure 2 This is a disassembled diagram of the detachable three-position sofa of this utility model.

[0018] Figure 3 This is a schematic diagram of the installation of the mechanical extension assembly and the handrail frame.

[0019] Figure 4 This is a structural diagram of the handrail frame.

[0020] Figure 5 This is a front view of the mechanical extension assembly in a seated position.

[0021] Figure 6 This is a rear view of the mechanical extension assembly in a seated position.

[0022] Figure 7 This is a front view of the mechanical extension component in TV pose.

[0023] Figure 8 This is a view of the back of the mechanical extension component in TV position.

[0024] Figure 9 This is a front view of the mechanical extension component in a lying position.

[0025] Figure 10 This is a rear view of the mechanical extension assembly in a lying position.

[0026] Figure 11 This is a diagram showing the installation of the seat frame.

[0027] The components include: 1. Seat frame; 2. Backrest; 21. Plug-in buckle; 3. Armrest frame; 31. U-shaped tube; 32. Side rod; 311. Support leg; 33. Diagonal support rod; 34. First connector; 4. Mechanical extension assembly; 41. Leg mechanism; 411. Leg link one; 412. Leg link two; 413. Leg link three; 4131. Fifth limiting pin; 414. Leg link four; 415. Leg link five; 416. Footrest mounting plate; 4161. Fifth limiting surface; 42. Seat mechanism; 421. Side mounting plate; 4211. Positioning slot; 4212. First limiting pin; 4213. Second limiting pin; 4214. Third limiting pin; 422. Seat link one. 423 Seat Link Two, 424 Seat Link Three, 425 Seat Link Four, 4251 Fourth Limiting Pin, 426 Seat Mounting Plate, 4261 Second Connector, 427 Seat Link Five, 4271 Third Limiting Surface, 4272 Fourth Limiting Surface, 428 Seat Link Six, 4281 Slide, 4282 Second Limiting Surface, 429 Seat Link Seven, 4291 First Limiting Surface, 43 Backrest Mechanism, 431 Backrest Mounting Plate, 432 Backrest Support Rod, 5 Front Crossbar, 51 Third Connector, 6 Rear Crossbar, 61 Fourth Connector. Detailed Implementation

[0028] 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.

[0029] like Figure 1-11As shown, a detachable three-position sofa includes a seat frame 1, a backrest 2, a footboard, and a pair of armrests 3. Each armrest 3 includes a U-shaped tube 31 and side rods 32. The side rods 32 are installed on one side of the opening of the U-shaped tube 31. The portion of the opening of the U-shaped tube 31 protruding from the side rod 31 forms a support leg 311. Diagonal braces 33 are welded between the two sides of the bottom surface of the side rod 32 and the support leg 311 to improve the supporting force of the side rod 32. A first connector 34 is welded to the inner wall of the side rod 32. The first connector 34 is detachably connected to a mechanical extension assembly 4 that can switch between sitting, TV, and reclining positions. The mechanical extension assembly 4 includes a leg mechanism 41, a seat mechanism 42, and a backrest mechanism 43. The seat mechanism 42 includes a side mounting plate 421 detachably connected to the first connector 34. The side mounting plate 421 has positioning slots 4211 on both its front and rear sides for assembly with the first connecting member. During assembly, the positioning slots engage with the bolts threaded to the first connecting member, using these bolts as positioning pins. After the bolts slide to the bottom of the positioning slots, the bolts are tightened to lock the side mounting plate onto the first connecting member, making installation convenient. The front side of the side mounting plate 421 is pivotally connected to seat link 1 422. The front end of seat link 1 422 is pivotally connected to seat link 2 423. The front end of seat link 2 423 is pivotally connected to seat link 3 424. The rear end of seat link 3 424 is pivotally connected to seat link 425. The inner wall of seat link 425 is fitted with a seat mounting plate 426. The front and rear ends of the seat mounting plate 426 are bent to form the second connecting member. 4261, the second connector 4261 is detachably connected to the seat frame 1 by bolts. The rear side of seat link 425 is pivotally connected to seat link 5 427. The top end of seat link 5 427 is pivotally connected to seat link 425. The middle part of seat link 5 427 is pivotally connected to seat link 6 428. The tail end of seat link 6 428 is pivotally connected to seat link 5 427. A groove 4281 is opened at the front end of seat link 6 428. A pin is installed on the front side of side mounting plate 421 and inserted into the groove 4281. The middle part of seat link 6 428 is pivotally connected to seat link 7 429. The tail end of seat link 7 429 is pivotally connected to the rear side of side mounting plate 421. The front end of seat link 7 429 is pivotally connected to the middle part of seat link 3 424. The inner side of side mounting plate 421 is connected to the front... Then, the first limiting pin 4212, the second limiting pin 4213, and the third limiting pin 4214 are installed sequentially. Seat link seven 429 has a first limiting surface 4291 that mates with the first limiting pin 4212. Seat link six 428 has a second limiting surface 4282 that mates with the second limiting pin 4213. Seat link five 427 has a third limiting surface 4271 that mates with the third limiting pin 4214. A fourth limiting pin 4251 is installed on the rear side of seat link four 425. Seat link five 427 has a fourth limiting surface 4272 that mates with the fourth limiting pin 4251. The leg mechanism 41 includes leg link one 411 and leg link two 412. The tail end of leg link one 411 is pivotally connected to the front end of seat link four 425.The front end of leg link 1 411 is pivotally connected to leg link 3 413; the rear end of leg link 2 412 is pivotally connected to the front end of seat link 3 424; the middle part of leg link 2 412 is pivotally connected to the middle part of leg link 1 411; the front end of leg link 2 412 is pivotally connected to leg link 414; the middle part of leg link 414 is pivotally connected to the middle part of leg link 3 413; and the front end of leg link 414 is pivotally connected to leg link 5 415. The front end of the leg link 415 is pivotally connected to the footrest mounting plate 416, which is detachably connected to the foot plate by bolts. The rear end of the footrest mounting plate 416 is pivotally connected to the front end of the leg link 413. A fifth limiting pin 4131 is installed on the front side of the leg link 413. The footrest mounting plate 416 has a fifth limiting surface 4161 that mates with the fifth limiting pin 4131. The backrest mechanism 43 includes a mechanism pivotally connected to the rear end of the seat link 425. The backrest mounting plate 431 is detachably connected to the backrest 2. The backrest 2 is detachably connected to the backrest mounting plate 431 via a snap fastener 21. The backrest mounting plate 431 is pivotally connected to the backrest support rod 432. The top end of the backrest support rod 432 is pivotally connected to the backrest mounting plate 431, and the bottom end of the backrest support rod 432 is pivotally connected to the rear end of the side mounting plate 421. To improve the stability of the armrest frame 3, a front crossbar 5 and a rear crossbar 6 are installed between the two armrest frames 3. The two ends of the front crossbar 5 are welded with third connecting pieces 51. The third connecting pieces 51 are bolted to the front bottom of the two U-shaped tubes 31 to avoid interference with the leg mechanism during operation. The two ends of the rear crossbar 6 are welded with fourth connecting pieces 61. The fourth connecting pieces 61 are bolted to the lower middle part of the rear side of the two U-shaped tubes 31 to avoid interference with the backrest mechanism during operation.

[0030] The specific working process and principle of the detachable three-position sofa of this utility model: When in the sitting position, the mechanical extension component 4 is in a fully retracted state. In this state, the first limiting pin 4212 abuts against the first limiting surface 4291, the second limiting pin 4213 abuts against the second limiting surface 4282, the third limiting pin 4214 abuts against the third limiting surface 4271, and the fifth limiting pin 4131 abuts against the fifth limiting surface 4161. When changing from the sitting position to the TV position, the hands push the armrest frame 3 backward, and the back rests against the backrest 2. The seat frame 1 and the backrest 2 move backward, and the seat linkage 427 rotates. The third limiting pin 4214 disengages from the third limiting surface 4271, and the fifth limiting pin 4131 disengages from the fifth limiting surface 4161. After the leg mechanism is fully extended, the fourth limiting pin 4251 abuts against the fourth limiting surface 4272. When transitioning from a TV position to a reclining position, the user continues to use their hands and back to drive the front side of the seat linkage 429 upwards. The first limiting pin 4212 disengages from the first limiting surface 4291, and the second limiting pin 4213 disengages from the second limiting surface 4282, until the pins slide relative to each other to the front end of the slide groove 4281, and the backrest mechanism is fully extended. When the extension component retracts, the user uses their hands and legs to retract the backrest mechanism and leg mechanism sequentially by pulling the armrest forward with their hands and bending their lower legs backward. It should be noted that this utility model can also be equipped with an electric drive mechanism according to user needs, making operation more convenient. The electric drive mechanism, mechanical extension assembly, seat frame, backrest, footboard, and armrest frame are all modular components, so they do not affect the packing volume of the sofa, which helps to reduce shipping costs. On this basis, the mechanical extension assembly can realize three-position conversion (sitting, TV position, and reclining position), which can better meet the user's needs.

Claims

1. A detachable three-position sofa, comprising a seat frame, backrest, footboard, and a pair of armrests, characterized in that: The armrest frame includes a U-shaped tube and a side rod. The side rod is installed on one side of the opening of the U-shaped tube. The part of the opening end of the U-shaped tube that protrudes from the side rod forms a support foot. The inner wall of the side rod is provided with a first connector. The first connector is detachably connected to a mechanical extension component that can switch between sitting, TV, and reclining positions. The seat frame, backrest, footboard, and mechanical extension component are detachably connected.

2. The detachable three-position sofa according to claim 1, characterized in that: The mechanical extension assembly includes a leg mechanism, a seat mechanism, and a backrest mechanism. The seat mechanism includes a side mounting plate detachably connected to a first connecting member. A seat link 1 is pivotally connected to the front side of the side mounting plate. A seat link 2 is pivotally connected to the front end of seat link 1. A seat link 3 is pivotally connected to the front end of seat link 2. A seat link 4 is pivotally connected to the rear end of seat link 3. A seat mounting plate for mounting a seat frame is provided on the inner side wall of seat link 4. A seat link 5 is pivotally connected to the rear side of seat link 4. The top end of seat link 5 is pivotally connected to seat link 4. A seat link 6 is pivotally connected to the middle of seat link 5. The rear end of seat link 6 is pivotally connected to seat link 5. A groove is provided at the front end of seat link 6. A pin for inserting into the groove is provided on the front side of the side mounting plate. A seat link 7 is pivotally connected to the middle of seat link 6. The rear end of seat link 7 is pivotally connected to the rear side of the side mounting plate. The front end of seat link 7 is pivotally connected to the seat link 5. In the middle of link three, the leg mechanism includes leg link one and leg link two. The tail end of leg link one is pivotally connected to the front end of seat link four. Leg link three is pivotally connected to the front end of leg link one. The tail end of leg link two is pivotally connected to the front end of seat link three. The middle part of leg link two is pivotally connected to the middle part of leg link one. Leg link four is pivotally connected to the front end of leg link two. The middle part of leg link four is pivotally connected to the middle part of leg link three. The front end of leg link four... The leg link five is pivotally connected to the end of the seat. The front end of the leg link five is pivotally connected to a footrest mounting plate for mounting a footboard. The rear end of the footrest mounting plate is pivotally connected to the front end of the leg link three. The backrest mechanism includes a backrest mounting plate pivotally connected to the rear end of the seat link four. The backrest is detachably connected to the backrest mounting plate via a snap fastener. The backrest mounting plate is pivotally connected to a backrest support rod. The top end of the backrest support rod is pivotally connected to the backrest mounting plate, and the bottom end of the backrest support rod is pivotally connected to the rear end of the side mounting plate.

3. The detachable three-position sofa according to claim 2, characterized in that: The seat mounting plate has second connectors at both the front and rear ends for mounting the seat frame.

4. The detachable three-position sofa according to claim 2, characterized in that: The inner side of the side mounting plate is provided with a first limiting pin, a second limiting pin and a third limiting pin in sequence from front to back. The seat link seven has a first limiting surface that cooperates with the first limiting pin, the seat link six has a second limiting surface that cooperates with the second limiting pin, the seat link five has a third limiting surface that cooperates with the third limiting pin, the rear side of the seat link four is provided with a fourth limiting pin, and the seat link five has a fourth limiting surface that cooperates with the fourth limiting pin.

5. The detachable three-position sofa according to claim 4, characterized in that: The front and rear sides of the side mounting plate are provided with positioning slots for assembly with the first connecting member.

6. The detachable three-position sofa according to claim 2, characterized in that: The front side of the leg link three is provided with a fifth limiting pin, and the foot rest mounting plate is provided with a fifth limiting surface that cooperates with the fifth limiting pin.

7. The detachable three-position sofa according to claim 1, characterized in that: It also includes a front crossbar and a rear crossbar. The front crossbar has a third connector at both ends and is detachably connected to the bottom front side of the two U-shaped tubes through the third connector. The rear crossbar has a fourth connector at both ends and is detachably connected to the lower rear side of the two U-shaped tubes through the fourth connector.

8. The detachable three-position sofa according to claim 1, characterized in that: A diagonal brace is provided between the bottom surface of the side rod and the support foot.

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