Sofa seat capable of converting sitting posture

Abstract

The utility model discloses a sofa seat capable of converting sitting postures, which comprises a support frame, an adjustable support plate and a backrest which are respectively arranged on the front side and the rear side of the support frame, and an adjusting mechanism, the adjusting mechanism comprises a sliding groove, a sliding rod, a receding groove, a pull block, an inserting column and a limiting hole, a headrest is slidably connected into a first notch formed in the upper surface of the backrest, the sliding groove is formed in the left side face of the headrest, the sliding rod is slidably connected into the sliding groove, the receding groove is formed in the left side face of the backrest, and the left end of the sliding rod is slidably connected into the receding groove; according to the sofa seat capable of converting the sitting postures, the sofa seat is adjusted through the adjusting mechanism, so that the sofa seat can adapt to various postures such as lying, sitting and the like of a user, the sitting postures of the user can be converted, the sitting postures of the user can be converted, and the sitting postures of the user can be converted. And the use flexibility of the sofa seat is improved.

Description

Technical Field

[0001] This utility model relates to the field of sofa and chair technology, specifically to a sofa and chair with adjustable seating posture. Background Technology

[0002] Chairs are a common type of furniture. Existing chairs mainly consist of a support frame, seat, and backrest. With the development of technology, people's requirements for sofas and chairs have gradually increased. In order to improve the comfort of people when using sofas and chairs, existing sofas and chairs usually have the function of adjusting the backrest angle.

[0003] When using existing sofas and chairs, users typically sit on the seat of the support frame and then lean back against the backrest. When the angle of the backrest needs to be adjusted, the locking mechanism is released by turning the adjustment handle, and then the backrest can be manually rotated to adjust the angle.

[0004] Existing sofas and chairs have the following problems: Most existing sofas and chairs only allow for adjustment of the angle between the backrest and the seat on the support frame, as well as the height of the sofa itself. They cannot be adjusted to adapt to different postures such as lying down and sitting, resulting in low flexibility. Therefore, we propose a sofa or chair with a convertible seating posture. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a sofa chair with convertible sitting posture. The sofa chair can be adjusted by the adjustment mechanism so that it can adapt to various postures such as lying down and sitting upright, which improves the flexibility of using the sofa chair and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sofa chair with convertible seating posture, including a support frame, adjustable support plates and backrests on the front and rear sides of the support frame, and an adjustment mechanism;

[0007] Adjustment mechanism: It includes a slide groove, a slide rod, a clearance groove, a pull block, a pin, and a limiting hole. A headrest is slidably connected to the slot on the upper surface of the backrest. A slide groove is provided on the left side of the headrest, and a slide rod is slidably connected inside the slide groove. A clearance groove is provided on the left side of the backrest, and the left end of the slide rod is slidably connected inside the clearance groove. A pull block is provided at the left end of the slide rod. Pins are provided on both the front and back sides of the right side of the pull block. A series of evenly distributed limiting holes are provided on the left side of the backrest, and the pins are inserted into the adjacent limiting holes. The adjustment mechanism allows the sofa seat to be adjusted to accommodate various postures such as lying down and sitting upright, improving the flexibility of using the sofa seat.

[0008] Furthermore, the adjustment mechanism also includes a reset assembly, which includes a limiting block and a spring. The right end of the slide rod is provided with a limiting block, and the outer surface of the slide rod is movably fitted with a spring. The spring is located between the left side of the limiting block and the left wall of the slide groove, which facilitates the fixing of the backrest and headrest.

[0009] Furthermore, the adjustment mechanism also includes an extension assembly, which includes a lead screw and a limiting rod. An extension plate is slidably connected to a slot two opened on the lower surface of the support plate. A lead screw is rotatably connected to the left side of the inside of the slot two. The outer surface of the lead screw is threadedly connected to a threaded hole opened on the left side of the extension plate. A limiting rod is provided on the right side of the inside of the slot two. The outer surface of the limiting rod is slidably connected to a sliding hole opened on the right side of the extension plate, which facilitates the control of the extension plate extending out.

[0010] Furthermore, the extension assembly also includes a first bevel gear, a rotating shaft, a second bevel gear, and a turntable. The upper end of the lead screw is provided with the first bevel gear, and the left wall of the support plate is rotatably connected to the second bevel gear via the rotating shaft. The first bevel gear and the second bevel gear are meshed together. The left end of the rotating shaft is provided with a turntable to facilitate the normal operation of the extension assembly.

[0011] Furthermore, the left and right sides of the support frame are rotatably connected to handrails via damping shafts, and the front and rear sides of the support frame are provided with rotating grooves. The interior of the front and rear rotating grooves are respectively rotatably connected to the support plate and the backrest via rotating rods, which facilitates the adjustment of the angles of the handrails, backrests and support plates.

[0012] Furthermore, a locking mechanism is also included, comprising a ratchet, a rotating rod, an adjusting handle, and a torsion spring. The left end of the rotating rod is equipped with a ratchet, and the front and rear sides of the left side of the support frame are rotatably connected to the adjusting handle via the rotating rod. The protruding parts on the outer surface of the adjusting handle are engaged between the two ratchet teeth of the adjacent ratchet. The outer surface of the rotating rod is fitted with a torsion spring, one end of which is fixedly connected to the left side of the support frame, and the other end of which abuts against the right side of the adjacent rotating rod, facilitating the locking of the rotation angle of the support plate and the backrest.

[0013] Furthermore, the upper surface of the support frame, the front side of the support plate, the front side of the backrest, the front side of the headrest, and the side of the armrest near the support frame are each provided with sponge pads to improve the user's comfort.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This convertible seating sofa has the following advantages:

[0015] When a user needs to change posture, first adjust the backrest and support plate to a suitable angle, then rotate the turntable to drive the lead screw to rotate. The rotation of the lead screw causes the extension plate to extend out from the second slot of the support plate until the combined length of the extension plate and the support plate can fully support the user's legs. Then pull the lever to make the insert leave the limiting hole, releasing the fixed relationship between the backrest and the headrest. The headrest can then be pulled out from the first slot of the backrest. Once the headrest is pulled out long enough to support the user's head, release the lever and fix the headrest again. By adjusting the sofa seat, it can adapt to various postures of the user, improving the flexibility of using the sofa seat. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is an enlarged structural schematic diagram of point A of this utility model;

[0019] Figure 4 This is an enlarged structural schematic diagram of section B of this utility model.

[0020] In the diagram: 1. Support frame, 2. Backrest, 3. Adjustment mechanism, 31. Slide groove, 32. Slide rod, 33. Clearance groove, 34. Pull block, 35. Insert post, 36. Limiting hole, 37. Reset assembly, 371. Limiting block, 372. Spring, 38. Extension assembly, 381. Lead screw, 382. Limiting rod, 383. Bevel gear one, 384. Rotating shaft, 385. Bevel gear two, 386. Turntable, 4. Support plate, 5. Armrest, 6. Headrest, 7. Extension plate, 8. Sponge pad, 9. Locking mechanism, 91. Ratchet, 92. Rotating rod, 93. Adjustment handle, 94. Torsion spring, 10. Rotating rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This embodiment provides a technical solution: a sofa chair with adjustable seating posture, including a support frame 1. Adjustable support plates 4 and a backrest 2 are respectively provided on the front and rear sides of the support frame 1. It also includes an adjustment mechanism 3. Armrests 5 are rotatably connected to the left and right sides of the support frame 1 via damping shafts. (The damping shaft has a metal core inside, surrounded by rubber or plastic damping pads. Tightening screws or clips increases the compression of the damping pads, thereby adjusting the friction. The damping force inside the damping shaft resists gravity and external forces, allowing it to be fixed at any angle.) The support frame 1... Rotating slots are provided on both the front and rear sides. The interiors of the front and rear rotating slots are rotatably connected to the support plate 4 and the backrest 2 via rotating rods 10, respectively. A locking mechanism 9 is also included, comprising a ratchet 91, a rotating rod 92, an adjusting handle 93, and a torsion spring 94. A ratchet 91 is provided at the left end of each rotating rod 10. Adjusting handles 93 are rotatably connected to both the front and rear sides of the left side of the support frame 1 via rotating rods 92. The protruding parts on the outer surface of the adjusting handle 93 engage between the two ratchet teeth of adjacent ratchet 91. A torsion spring 94 is fitted onto the outer surface of each rotating rod 10, with one end of each torsion spring 94 fixed. Connected to the left side of the support frame 1, the other ends of the torsion springs 94 abut against the right side of the adjacent rotating rods 92. The upper surface of the support frame 1, the front side of the support plate 4, the front side of the backrest 2, the front side of the headrest 6, and the side of the armrest 5 near the support frame 1 are each provided with a sponge pad 8. When the user needs to adjust the angle of the backrest 2, they move the adjustment handle 93. The adjustment handle 93 rotates against the resistance of the torsion spring 94, causing the protrusion on the adjustment handle 93 to disengage from the two ratchet teeth of the ratchet 91. At this time, the backrest 2 can be manually rotated counterclockwise to adjust the angle, and the torsion spring 94 is in a deformation storage state. In the working state, after adjustment, release the adjustment handle 93, the torsion spring 94 releases energy, pushes the adjustment handle 93 to reset, and at the same time the protrusion on the adjustment handle 93 re-engages between the corresponding two ratchet teeth of the ratchet 91, so that the backrest 2 cannot be rotated counterclockwise to adjust the angle. The same operation is performed when adjusting the angle of the support plate 4. After the support plate 4 is adjusted, it cannot be rotated clockwise to adjust the angle. The user can rotate the armrest 5. Due to the existence of the damping pivot, the armrest 5 can be fixed at a suitable angle. Due to the existence of the sponge pad 8, the user's comfort level when using the sofa seat is improved.

[0023] Adjustment mechanism 3 includes a slide groove 31, a slide rod 32, a clearance groove 33, a pull block 34, inserts 35, and limiting holes 36. A headrest 6 is slidably connected to a slot on the upper surface of the backrest 2. A slide groove 31 is provided on the left side of the headrest 6, and a slide rod 32 is slidably connected inside the slide groove 31. A clearance groove 33 is provided on the left side of the backrest 2, and the left end of the slide rod 32 is slidably connected inside the clearance groove 33. A pull block 34 is provided at the left end of the slide rod 32. Inserts 35 are provided on both the front and rear sides of the right side of the pull block 34. Limiting holes 36 are evenly distributed on the left side of the backrest 2, and the inserts 35 are all inserted into the adjacent limiting holes 36. Adjustment mechanism 3 also includes a reset assembly 37, which includes a limiting block 371 and a spring 372. A limiting block 371 is provided at the right end, and a spring 372 is movably sleeved on the outer surface of the slide rod 32. The spring 372 is located between the left side of the limiting block 371 and the left wall of the slide groove 31. The adjusting mechanism 3 also includes an extension assembly 38, which includes a lead screw 381 and a limiting rod 382. An extension plate 7 is slidably connected in the slot 2 opened on the lower surface of the support plate 4. The lead screw 381 is rotatably connected to the left side of the slot 2. The outer surface of the lead screw 381 is threadedly connected to the threaded hole opened on the left side protrusion of the extension plate 7. (A bellows is sleeved on the exposed part of the outer surface of the lead screw 381. The bellows is fixedly connected between the side wall of the slot 2 and the side of the left side protrusion of the extension plate 7. Regardless of whether the lead screw 381 rotates or not, the bellows always wraps around and protects the lead screw 381.) (To ensure the sealing and lubrication of the lead screw 381), a limiting rod 382 is provided on the right side of the inner side of the slot 2. The outer surface of the limiting rod 382 is slidably connected to the sliding hole opened on the right side protrusion of the extension plate 7. The extension assembly 38 also includes a bevel gear 383, a rotating shaft 384, a bevel gear 385, and a turntable 386. The upper end of the lead screw 381 is provided with a bevel gear 383. The left wall of the support plate 4 is rotatably connected to the bevel gear 385 through the rotating shaft 384. The bevel gear 383 and the bevel gear 385 are meshed. The left end of the rotating shaft 384 is provided with a turntable 386. When the user needs to change the posture, first adjust the backrest 2 and the support plate 4 to a suitable angle, and then rotate the turntable 386. The turntable 386 drives the bevel gear 385 to rotate through the rotating shaft 384. The rotation of wheel 385 drives the lead screw 381 to rotate via the meshing bevel gear 383. The rotation of the lead screw 381 causes the threaded extension plate 7 to move along the limiting rod 382. The extension plate 7 extends out from the slot 2 of the support plate 4 until the combined length of the extension plate 7 and the support plate 4 can fully support the user's legs. Then, the pull block 34 is pulled, which drives the insert 35 to leave the limiting hole 36, releasing the fixed relationship between the backrest 2 and the headrest 6. At this time, the pull block 34 drives the limiting block 371 to slide along the slide groove 31 via the slide rod 32, compressing the spring 372. Then, the headrest 6 can be pulled out from the slot 1 of the backrest 2. At this time, the slide rod 32 slides along the relief groove 33. When the length of the headrest 6 pulled out is sufficient to support the user's head, the pull block 34 is released.Spring 372, through its restoring force, moves limiting block 371 to the right. Limiting block 371, via slide rod 32, moves pull block 34 to the right, causing insert 35 to engage with adjacent limiting hole 36. If insert 35 is not aligned with limiting hole 36 at this point, the headrest 6 can be pulled out further. When insert 35 is engaged with adjacent limiting hole 36, the headrest 6 is fixed within the backrest 2, allowing the sofa seat to be adjusted to accommodate various user postures.

[0024] The working principle of the convertible sofa chair provided by this utility model is as follows: When the user needs to adjust the angle of the backrest 2, he / she moves the adjustment handle 93. The adjustment handle 93 rotates against the resistance of the torsion spring 94, causing the protrusion on the adjustment handle 93 to disengage from the two ratchet teeth of the ratchet wheel 91. At this time, the backrest 2 can be manually rotated counterclockwise to adjust the angle. The torsion spring 94 is in a deformed energy storage state. After the adjustment is completed, the adjustment handle 93 is released, the torsion spring 94 releases energy, pushes the adjustment handle 93 to reset, and at the same time, the protrusion on the adjustment handle 93 re-engages between the corresponding two ratchet teeth of the ratchet wheel 91, causing the backrest 2 to rotate counterclockwise to adjust the angle. Backrest 2 cannot be rotated counterclockwise to adjust the angle. Adjusting the angle of support plate 4 is the same as described above. After adjustment, support plate 4 cannot be rotated clockwise to adjust the angle. The user can rotate armrest 5. Due to the damping shaft, armrest 5 can be fixed at a suitable angle. When the user needs to change posture, first adjust backrest 2 and support plate 4 to a suitable angle, then rotate turntable 386. Turntable 386 drives bevel gear 2 385 to rotate via shaft 384. The rotation of bevel gear 2 385 drives lead screw 381 to rotate via meshing bevel gear 1 383. The rotation of lead screw 381 drives the threaded screw... The extension plate 7 moves along the limiting rod 382, ​​extending from the slot 2 of the support plate 4 until the combined length of the extension plate 7 and the support plate 4 can fully support the user's legs. Then, the pull block 34 is pulled, causing the insert 35 to move out of the limiting hole 36, releasing the fixed relationship between the backrest 2 and the headrest 6. At this time, the pull block 34 drives the limiting block 371 to slide along the slide groove 31 via the slide rod 32, compressing the spring 372. Then, the headrest 6 can be pulled out from the slot 1 of the backrest 2. At this time, the slide rod 32 slides along the clearance groove 33. When the length of the headrest 6 pulled out is sufficient to support the user... After the headrest is in place, release the pull block 34. The spring 372 will cause the limiting block 371 to move to the right through the rebound force. The limiting block 371 will cause the pull block 34 to move to the right through the slide rod 32, so that the insertion post 35 is inserted into the adjacent limiting hole 36. If the insertion post 35 is not aligned with the limiting hole 36 at this time, continue to pull out part of the headrest 6. When the insertion post 35 is inserted into the adjacent limiting hole 36, the headrest 6 is fixed in the backrest 2. By adjusting the sofa seat, it can adapt to various postures of the user. Due to the presence of the sponge pad 8, the comfort of the user when using the sofa seat is improved.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sofa chair with adjustable seating posture, comprising a support frame (1), wherein adjustable support plates (4) and a backrest (2) are respectively provided on the front and rear sides of the support frame (1), characterized in that: It also includes the adjustment mechanism (3); Adjustment mechanism (3): It includes a sliding groove (31), a sliding rod (32), a clearance groove (33), a pull block (34), a plug (35), and a limiting hole (36). A headrest (6) is slidably connected to the slot on the upper surface of the backrest (2). A sliding groove (31) is provided on the left side of the headrest (6). A sliding rod (32) is slidably connected inside the sliding groove (31). A clearance groove (33) is provided on the left side of the backrest (2). The left end of the sliding rod (32) is slidably connected to the inside of the clearance groove (33). A pull block (34) is provided on the left end of the sliding rod (32). A plug (35) is provided on both the front and back sides of the right side of the pull block (34). A limiting hole (36) is evenly distributed on the left side of the backrest (2). The plugs (35) are all inserted into the inside of the adjacent limiting holes (36).

2. The sofa chair with adjustable seating posture according to claim 1, characterized in that: The adjustment mechanism (3) further includes a reset assembly (37), which includes a limit block (371) and a spring (372). The right end of the slide rod (32) is provided with a limit block (371), and the outer surface of the slide rod (32) is movably fitted with a spring (372). The spring (372) is located between the left side of the limit block (371) and the left wall of the slide groove (31).

3. The sofa chair with adjustable seating posture according to claim 1, characterized in that: The adjustment mechanism (3) also includes an extension component (38), which includes a lead screw (381) and a limiting rod (382). An extension plate (7) is slidably connected in the slot two opened on the lower surface of the support plate (4). The lead screw (381) is rotatably connected to the left side of the slot two. The outer surface of the lead screw (381) is threadedly connected to the threaded hole opened on the left side protrusion of the extension plate (7). A limiting rod (382) is provided on the right side of the slot two. The outer surface of the limiting rod (382) is slidably connected to the sliding hole opened on the right side protrusion of the extension plate (7).

4. The sofa chair with adjustable seating posture according to claim 3, characterized in that: The extension assembly (38) also includes a first bevel gear (383), a rotating shaft (384), a second bevel gear (385), and a turntable (386). The upper end of the lead screw (381) is provided with a first bevel gear (383). The left wall of the support plate (4) is rotatably connected to the second bevel gear (385) through the rotating shaft (384). The first bevel gear (383) and the second bevel gear (385) are meshed together. The left end of the rotating shaft (384) is provided with a turntable (386).

5. The sofa chair with adjustable seating posture according to claim 1, characterized in that: The support frame (1) has handrails (5) rotatably connected to both the left and right sides via damping shafts. Rotating grooves are provided on both the front and rear sides of the support frame (1). The support plate (4) and backrest (2) are rotatably connected to the interior of the front and rear rotating grooves via rotating rods (10).

6. The sofa chair with adjustable seating posture according to claim 5, characterized in that: It also includes a locking mechanism (9), which includes a ratchet (91), a rotating rod (92), an adjusting handle (93), and a torsion spring (94). The left end of the rotating rod (10) is provided with a ratchet (91). The front and rear sides of the left side of the support frame (1) are rotatably connected to the adjusting handle (93) through the rotating rod (92). The protruding part of the outer surface of the adjusting handle (93) is engaged between the two ratchet teeth of the adjacent ratchet (91). The outer surface of the rotating rod (10) is provided with a torsion spring (94). One end of the torsion spring (94) is fixedly connected to the left side of the support frame (1), and the other end of the torsion spring (94) abuts against the right side of the adjacent rotating rod (92).

7. The sofa chair with adjustable seating posture according to claim 5, characterized in that: The upper surface of the support frame (1), the front side of the support plate (4), the front side of the backrest (2), the front side of the headrest (6), and the side of the armrest (5) near the support frame (1) are respectively provided with sponge pads (8).

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