An adjustable sofa

Abstract

The application discloses an adjustable sofa and relates to the technical field of sofas.The adjustable sofa comprises a sofa seat frame, a backrest frame is hinged to the right side of the sofa seat frame, a support frame is bolted to the top end inside the sofa seat frame, a transmission gear is rotationally connected to the right side inside the support frame, a chain wheel is bolted to the surface of the transmission gear, an adjusting gear is meshed with the teeth on the top of the transmission gear, the adjusting gear is bolted with the backrest frame, a driving wheel is rotationally connected to the inside of the support frame, a transmission belt is transmissionally connected to the inside of the driving wheel, a guide wheel is transmissionally connected to the right side inside the transmission belt, and the guide wheel is rotationally connected with the support frame.The backrest frame can be driven to rotate by the structural transmission, the inclination angle of the backrest frame can meet the needs of users, the support frame can support the backrest frame by being moved, the backrest frame can be horizontally supported on the support frame, the area of the sofa is expanded, and the user can rest at night.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sofa technology, and in particular to an adjustable sofa. BACKGROUND

[0002] A sofa is a common piece of furniture. For example, patent No. 202123406278.3 discloses an adjustable sofa, which comprises a plurality of sofa bodies arranged in sequence. The sofa bodies are connected together. The left side of each sofa body is provided with a left armrest connected to the sofa body. The right side of each sofa body is provided with a right armrest connected to the sofa body. Each sofa body comprises a base and a backrest connected by a hinge. The base is provided with a seat cushion, and the backrest is provided with a back cushion. The sofa combination is flexible and can adapt to different space arrangements. The structure is simple, the operation is convenient, and the sofa body can be folded to reduce the volume when not in use. All parts are small in size, facilitating transportation, transportation and storage.

[0003] However, the adjustable sofa has some problems. For example, the backrest is usually fixed to the sofa base by bolts, and the inclination state is usually fixed and cannot be adjusted according to the needs of the user. In addition, when the sofa needs to be used for sleeping, the area available for sleeping is small, and the user often rolls off the sofa at night. SUMMARY

[0004] The purpose of the present application is to provide an adjustable sofa to solve the problems mentioned in the background.

[0005] To achieve the above purpose, the present application provides the following technical solution: an adjustable sofa, comprising a sofa seat frame, a backrest frame is hinged to the right side of the sofa seat frame, a support frame is bolted to the top inside of the sofa seat frame, a transmission gear is rotatably connected to the right side inside of the support frame, a chain wheel is bolted to the surface of the transmission gear, an adjustment gear is meshed with the teeth of the top of the transmission gear, the adjustment gear is bolted to the backrest frame, a driving wheel is rotatably connected inside the support frame, a transmission belt is transmissionally connected inside the driving wheel, a guide wheel is transmissionally connected to the right side inside of the transmission belt, the guide wheel is rotatably connected to the support frame, a support frame is slidably connected to the bottom of the support frame, a support assembly is bolted to the hole on the right side of the top of the support frame, the support assembly is bolted to the backrest frame, the support frame is bolted to the transmission belt, the teeth of the chain wheel are meshed with an adjustment mechanism, the teeth of the adjustment mechanism are meshed with a transmission mechanism, and the transmission mechanism is bolted to the driving wheel.

[0006] By the above structure, the adjusting mechanism can drive the transmission gear to rotate through the chain wheel, and the transmission gear can drive the support frame to rotate through the adjusting gear, so that the inclination angle of the support frame can be adjusted, which is convenient for use; the adjusting mechanism can drive the driving wheel to rotate through the transmission mechanism, the driving wheel can drive the transmission belt to rotate, the transmission belt can drive the support frame to move, and the support frame can support and stabilize the support frame through the support assembly; the structure transmission can drive the support frame to rotate, so that the inclination angle of the support frame meets the needs of the user, and the support frame can support the support frame by moving the support frame, so that the support frame can be horizontally supported on the support frame, thereby expanding the area of the sofa and facilitating the user to use it for rest at night.

[0007] Preferably, the adjusting mechanism comprises a worm, a driving gear, an upper gear, an upper screw and an upper slide, both ends of the surface of the worm are rotatably sleeved with the inside of the support frame, the right end of the worm is connected with the left shaft of the driving gear, the teeth on the top of the driving gear are engaged with the teeth of the upper gear, the right shaft of the upper gear is connected with the left end of the upper screw, the left end of the surface of the upper screw is rotatably sleeved with the inside of the support frame, the right end of the upper screw is threadedly connected with the left screw hole of the upper slide, the adjusting mechanism further comprises a transmission assembly engaged with the transmission gear, and the worm is engaged with the transmission mechanism.

[0008] Further, the left end of the worm extends to the left side of the support frame and is connected with a hand wheel, the worm can be rotated through the hand wheel, the worm is rotatably arranged with the support frame through a bearing, the stability of the rotation of the worm is ensured, the worm can drive the driving gear to rotate, the driving gear can drive the upper gear to rotate, the upper gear can drive the upper screw to rotate, the upper screw is rotatably arranged with the support frame through a bearing, the resistance of the rotation of the upper screw is reduced, the stability of the rotation of the upper screw is ensured, and the upper screw can drive the upper slide to move left through threads.

[0009] Preferably, the transmission assembly comprises a lower gear, a lower screw, a lower slide and a chain, the teeth of the lower gear are engaged with the teeth on the bottom of the driving gear, the left end of the lower gear is connected with the left end of the lower screw, the left end of the surface of the lower screw is rotatably sleeved with the inside of the support frame, the right end of the lower screw is threadedly connected with the left screw hole of the lower slide, the right end of the lower slide is connected with the bottom of the left side of the chain, the top of the left side of the chain is connected with the right end of the upper slide, and the inside of the chain is engaged with the teeth of the chain wheel.

[0010] Further, the driving gear can drive the lower gear to rotate, the lower gear can drive the lower screw to rotate, the lower screw is rotatably arranged with the support frame through a bearing, the resistance of the rotation of the lower screw is reduced, the stability of the rotation of the lower screw is ensured, the lower screw can drive the lower slide to move right through threads, the upper slide can drive the top of the left side of the chain to move left, the lower slide can drive the bottom of the left side of the chain to move right, the upper slide and the lower slide can drive the chain to rotate counterclockwise, and the chain can drive the chain wheel to rotate counterclockwise.

[0011] Preferably, the rear side of the upper slide is slidingly connected with a limiting frame, the inside of the limiting frame is slidingly connected with the rear side of the lower slide, the rear side of the limiting frame is bolted with the inside of the supporting frame, and the chain has a U-shaped structure.

[0012] Further, the upper slide and the lower slide are slidingly arranged with the limiting frame through slide rails, and the upper slide and the lower slide are slidingly limited, so that the upper slide and the lower slide can move left and right stably, and the upper slide and the lower slide are prevented from being driven to deviate, and the structure of the chain facilitates rotation of the chain wheel.

[0013] Preferably, the transmission mechanism comprises a worm gear, a sliding ring and a rack, the top of the worm gear is engaged with the surface of the worm, the axis of the worm gear is rotationally connected with the inside of the supporting frame, the right end of the surface of the worm gear is slidingly connected with the inside of the sliding ring, the right side of the sliding ring is bolted with the left end of the rack, and the transmission mechanism further comprises a connecting assembly engaged with the rack.

[0014] Further, the worm can drive the worm gear to rotate, the worm gear is rotationally arranged with the supporting frame through a bearing, the stability of the rotation of the worm gear is ensured, the worm gear and the sliding ring have an eccentric structure, the protrusion of the worm gear is slidingly arranged with the inside of the sliding ring, the worm gear can drive the sliding ring to move, and the sliding ring can drive the rack to move.

[0015] Preferably, the connecting assembly comprises a rotating shaft, a large bevel gear and a small bevel gear, the teeth of the rack are engaged with the teeth of the rotating shaft, the surface of the rotating shaft is rotationally sleeved with the inside of the supporting frame, the bottom end of the rotating shaft is bolted with the axis of the top of the large bevel gear, the teeth of the large bevel gear are engaged with the teeth of the small bevel gear, and the rear side of the small bevel gear is bolted with the surface of the driving wheel.

[0016] Further, the rack can drive the rotating shaft to rotate, the rotating shaft is rotationally arranged with the supporting frame through a bearing, the stability of the rotation of the rotating shaft is ensured, the rotating shaft can drive the large bevel gear to rotate, the large bevel gear and the small bevel gear are both bevel gears, the large bevel gear can be engaged with the small bevel gear, the large bevel gear can drive the small bevel gear to rotate, and the small bevel gear can drive the driving wheel to rotate.

[0017] Preferably, the rear side of the rack is slidingly connected with a sliding frame, the rear side of the sliding frame is bolted with the inside of the supporting frame, the sliding ring and the rack are located on the front side of the worm, the top end of the rotating shaft is bolted with a gear ring, and the gear ring is engaged with the rack.

[0018] Further, the rack is slidingly arranged with the sliding frame through slide rails, the rack is guided, and the rack can move left and right stably, the rack is prevented from being driven to deviate, the positions of the sliding ring, the rack and the worm can avoid conflicts of structures, and the rack can drive the rotating shaft to rotate through the gear ring.

[0019] Preferably, the support assembly comprises a cylinder and a support ring, the surface of the cylinder is bolted with the hole on the right side of the top of the support frame, the protrusion on the output end of the cylinder is in sliding connection with the inside of the support ring, and the left side of the support ring is bolted with the right side of the leaning frame.

[0020] Further, the cylinder is of the same type as the lifting office chair, and a switch valve is used to control whether the cylinder can be compressed, so that the leaning frame can conveniently compress the output end of the cylinder through the support ring, and after the leaning frame is adjusted to the position, the valve switch of the cylinder can be turned to make the cylinder unable to be compressed.

[0021] Preferably, the support frame is in C-shaped structure, the top of the support frame is bolted with a connecting block, and the surface of the connecting block is in sliding connection with the sliding port at the bottom of the support frame.

[0022] Further, the walking wheels at the right end of the support frame reduce the friction between the support frame and the ground, facilitate the movement of the support frame, the structure of the support frame facilitates the support effect, and the support frame is in sliding connection with the support frame through the connecting block, so as to guide the support frame.

[0023] Preferably, the rear side of the support frame is in sliding connection with a guide frame, the rear side of the guide frame is bolted with the inside of the sofa seat frame, and the front side and the rear side of the top of the sofa seat frame are both bolted with an armrest.

[0024] Further, the support frame is in sliding connection with the guide frame through the sliding rail, so as to guide the support frame, ensure the smooth movement of the support frame, and avoid the inclination of the support frame.

[0025] In summary, the technical effects and advantages of the present application are as follows:

[0026] 1. The adjusting mechanism can drive the transmission gear to rotate through the chain wheel, the transmission gear can drive the leaning frame to rotate through the adjusting gear, so that the inclination angle of the leaning frame can be adjusted, and the use is facilitated.

[0027] 2. The adjusting mechanism can drive the driving wheel to rotate through the transmission mechanism, the driving wheel can drive the transmission belt to rotate, the transmission belt can drive the support frame to move, and the support frame can support and stabilize the leaning frame through the support assembly.

[0028] The structure transmission can drive the leaning frame to rotate, so that the inclination angle of the leaning frame meets the needs of the user, and the support frame can be moved to support the leaning frame. The leaning frame can be horizontally supported on the support frame, so as to expand the area of the sofa and facilitate the user to use it for rest at night. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a front view structural schematic diagram of the embodiment of the present application.

[0030] Figure 2Structure diagram of the adjusting mechanism of the embodiment of the present application;

[0031] Figure 3 Structure diagram of the rear view of the adjusting mechanism of the embodiment of the present application;

[0032] Figure 4 Structure diagram of the rear view of the transmission mechanism of the embodiment of the present application;

[0033] Figure 5 Structure diagram of the rear view of the embodiment of the present application;

[0034] Figure 6 Structure diagram of the chain of the embodiment of the present application;

[0035] Figure 7 Structure diagram of the driving gear of the embodiment of the present application;

[0036] Figure 8 Structure diagram of the transmission belt of the embodiment of the present application.

[0037] In the figure: 1, sofa seat frame; 2, adjusting mechanism; 21, worm; 22, driving gear; 23, upper gear; 24, upper screw rod; 25, upper slide; 26, lower gear; 27, lower screw rod; 28, lower slide; 29, chain; 3, transmission mechanism; 31, worm wheel; 32, slide ring; 33, rack; 34, rotating shaft; 35, large conical gear; 36, small conical gear; 4, back frame; 5, support frame; 6, chain wheel; 7, transmission gear; 8, adjusting gear; 9, driving wheel; 10, transmission belt; 11, guide wheel; 12, support frame; 13, air cylinder; 14, support ring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] EMBODIMENT

[0040] REFERENCE Figures 1-8The embodiment discloses an adjustable sofa, which comprises a sofa seat frame 1, a backrest frame 4 hinged to the right side of the sofa seat frame 1, a support frame 5 bolted to the top end of the sofa seat frame 1, a transmission gear 7 rotatably connected to the right side in the support frame 5, a chain wheel 6 bolted to the surface of the transmission gear 7, an adjusting gear 8 penetrating the opening at the top of the support frame 5 and meshing with the teeth of the transmission gear 7, the rear side of the adjusting gear 8 being bolted to the hinge shaft of the backrest frame 4, a driving wheel 9 rotatably connected to the inside of the support frame 5, a transmission belt 10 drivingly connected to the inside of the driving wheel 9, a guide wheel 11 drivingly connected to the right side in the transmission belt 10, the shaft center of the guide wheel 11 being rotatably connected to the inside of the support frame 5, a support frame 12 slidingly connected to the bottom of the support frame 5, a hole in the top right side of the support frame 12 being bolted to a support assembly, the support assembly being bolted to the backrest frame 4, the top of the support frame 12 penetrating the sliding opening at the bottom of the support frame 5 and being bolted to the bottom of the transmission belt 10, the teeth of the chain wheel 6 meshing with an adjusting mechanism 2, the teeth of the adjusting mechanism 2 meshing with a transmission mechanism 3, and the transmission mechanism 3 being bolted to the driving wheel 9.

[0041] Through the above mechanism, the backrest frame 4 can be driven to rotate by structural transmission, so that the inclination angle of the backrest frame 4 can meet the needs of the user, the support frame 12 can be moved to support the backrest frame 4, and the backrest frame 4 can be horizontally supported on the support frame 12, so that the area of the sofa is expanded, and the user can use the sofa for rest at night.

[0042] As a preferred embodiment of the embodiment, the adjusting mechanism 2 comprises a worm 21, a driving gear 22, an upper gear 23, an upper screw rod 24 and an upper sliding bar 25, both ends of the surface of the worm 21 are rotatably sleeved with the inside of the support frame 5, the right end of the worm 21 is bolted to the shaft center at the left side of the driving gear 22, the teeth at the top of the driving gear 22 mesh with the teeth of the upper gear 23, the shaft center at the right side of the upper gear 23 is bolted to the left end of the upper screw rod 24, the left end of the surface of the upper screw rod 24 is rotatably sleeved with the inside of the support frame 5, the right end of the upper screw rod 24 is screwedly connected with a screw hole at the left side of the upper sliding bar 25, the adjusting mechanism 2 further comprises a transmission assembly meshing with the transmission gear 7, and the worm 21 meshes with the transmission mechanism 3.

[0043] The left end of the worm 21 extends to the left side of the support frame 5 and is bolted with a hand wheel, the worm 21 can be rotated through the hand wheel, the worm 21 is rotatably arranged with the support frame 5 through a bearing, the stability of rotation of the worm 21 is guaranteed, the worm 21 can drive the driving gear 22 to rotate, the driving gear 22 can drive the upper gear 23 to rotate, the upper gear 23 can drive the upper screw rod 24 to rotate, the upper screw rod 24 is rotatably arranged with the support frame 5 through a bearing, the resistance of rotation of the upper screw rod 24 is reduced, the stability of rotation of the upper screw rod 24 is guaranteed, the upper screw rod 24 can drive the upper sliding bar 25 to move to the left through threads, and the structure of the upper screw rod 24 and the upper sliding bar 25 can generate a self-locking effect, so that the upper sliding bar 25 is prevented from driving the upper screw rod 24 to rotate.

[0044] In the embodiment, the transmission assembly includes a lower gear 26, a lower screw rod 27, a lower slide bar 28 and a chain 29. The teeth of the lower gear 26 are engaged with the teeth of the bottom of the driving gear 22. The shaft center of the right side of the lower gear 26 is bolted with the left end of the lower screw rod 27. The left end of the surface of the lower screw rod 27 is rotatably sleeved with the inside of the support frame 5. The right end of the lower screw rod 27 is threadedly connected with the screw hole of the left side of the lower slide bar 28. The right end of the lower slide bar 28 is bolted with the bottom of the left side of the chain 29. The top of the left side of the chain 29 is bolted with the right end of the upper slide bar 25. The inside of the chain 29 is engaged with the teeth of the sprocket 6.

[0045] The driving gear 22 can drive the lower gear 26 to rotate. The lower gear 26 can drive the lower screw rod 27 to rotate. The lower screw rod 27 is rotatably arranged with the support frame 5 through a bearing, so as to reduce the rotating resistance of the lower screw rod 27 and ensure the stability of the rotation of the lower screw rod 27. The lower screw rod 27 can drive the lower slide bar 28 to move rightward by means of threads. The upper slide bar 25 can drive the top of the left side of the chain 29 to move leftward. The lower slide bar 28 can drive the bottom of the left side of the chain 29 to move rightward. The upper slide bar 25 and the lower slide bar 28 can drive the chain 29 to rotate counterclockwise. The chain 29 can drive the sprocket 6 to rotate counterclockwise. The self-propelling effect can be generated between the lower screw rod 27 and the lower slide bar 28, so as to avoid the lower slide bar 28 from driving the lower screw rod 27 to rotate. In addition, the upper screw rod 24 and the upper slide bar 25 can share the pressure and avoid the thread from slipping.

[0046] In the embodiment, the rear side of the upper slide bar 25 is slidably connected with a limiting frame. The inside of the limiting frame is slidably connected with the rear side of the lower slide bar 28. The rear side of the limiting frame is bolted with the inside of the support frame 5. The chain 29 is in a U-shaped structure.

[0047] The upper slide bar 25 and the lower slide bar 28 are both slidably arranged with the limiting frame through slide rails. The upper slide bar 25 and the lower slide bar 28 are limited in sliding, so that the upper slide bar 25 and the lower slide bar 28 can move leftward and rightward stably. The upper slide bar 25 and the lower slide bar 28 are prevented from being driven to deviate. The structure of the chain 29 facilitates the rotation of the sprocket 6.

[0048] In the embodiment, the transmission mechanism 3 includes a worm gear 31, a sliding ring 32 and a rack 33. The top of the worm gear 31 is engaged with the surface of the worm 21. The shaft center of the worm gear 31 is rotatably connected with the inside of the support frame 5. The right end of the surface of the worm gear 31 is slidably connected with the inside of the sliding ring 32. The right side of the sliding ring 32 is bolted with the left end of the rack 33. The transmission mechanism 3 further includes a connecting assembly engaged with the rack 33.

[0049] The worm 21 can drive the worm wheel 31 to rotate, the worm wheel 31 is rotatably arranged with the support frame 5 through a bearing, the stability of the rotation of the worm wheel 31 is guaranteed, the worm wheel 31 and the sliding ring 32 are in an eccentric structure, the protrusion of the worm wheel 31 is slidably arranged in the sliding ring 32, the worm wheel 31 can drive the sliding ring 32 to move, the sliding ring 32 can drive the rack 33 to move, the structure of the worm 21 and the worm wheel 31 can produce a self-locking effect, and the rotation of the worm 21 driven by the worm wheel 31 is avoided.

[0050] In the embodiment, the connecting assembly includes the rotating shaft 34, the large bevel gear 35 and the small bevel gear 36, the teeth of the rack 33 are engaged with the teeth of the rotating shaft 34, the surface of the rotating shaft 34 is rotatably sleeved with the inside of the support frame 5, the bottom end of the rotating shaft 34 is bolted with the shaft center of the top of the large bevel gear 35, the teeth of the large bevel gear 35 are engaged with the teeth of the small bevel gear 36, and the rear side of the small bevel gear 36 is bolted with the surface of the driving wheel 9.

[0051] The rack 33 can drive the rotating shaft 34 to rotate, the rotating shaft 34 is rotatably arranged with the support frame 5 through a bearing, the stability of the rotation of the rotating shaft 34 is guaranteed, the rotating shaft 34 can drive the large bevel gear 35 to rotate, the large bevel gear 35 and the small bevel gear 36 are both bevel gears, the large bevel gear 35 can be engaged with the small bevel gear 36, the large bevel gear 35 can drive the small bevel gear 36 to rotate, the small bevel gear 36 can drive the driving wheel 9 to rotate, and the combination of the rotating shaft 34 and the large bevel gear 35 can produce an acceleration effect, so that the large bevel gear 35 can drive the small bevel gear 36 to rotate faster.

[0052] In the embodiment, the rear side of the rack 33 is slidably connected with a sliding frame, the rear side of the sliding frame is bolted with the inside of the support frame 5, the sliding ring 32 and the rack 33 are located on the front side of the worm 21, the top end of the rotating shaft 34 is bolted with a gear ring, and the gear ring is engaged with the rack 33.

[0053] The rack 33 is slidably arranged with the sliding frame through a sliding rail, the rack 33 is guided to move left and right stably, the rack 33 is prevented from being driven to deviate, the positional relationship among the sliding ring 32, the rack 33 and the worm 21 can avoid structural conflicts, and the rack 33 can drive the rotating shaft 34 to rotate through the gear ring.

[0054] In the embodiment, the supporting assembly includes the air cylinder 13 and the supporting ring 14, the surface of the air cylinder 13 is bolted with the hole on the top right side of the support frame 12, the protrusion at the output end of the air cylinder 13 is slidably connected with the inside of the supporting ring 14, and the left side of the supporting ring 14 is bolted with the right side of the leaning frame 4.

[0055] The cylinder 13 is of the same type as the lifting office chair, and a switch valve is used to control whether the cylinder 13 can be compressed, so that the support frame 4 can conveniently compress the output end of the cylinder 13 through the supporting ring 14, and after the support frame 4 is adjusted to a position, the valve switch of the cylinder 13 is turned to make the cylinder 13 unable to be compressed.

[0056] In the embodiment, the support frame 12 is rotatably connected with walking wheels at both sides of the bottom, the support frame 12 has a C-shaped structure, and the top of the support frame 12 is bolted with a connecting block, and the surface of the connecting block is slidably connected with the sliding port at the bottom of the support frame 5.

[0057] The walking wheels facilitate the right end of the support frame 12, reduce the friction between the support frame 12 and the ground, and facilitate the movement of the support frame 12, the structure of the support frame 12 facilitates the support effect, and the support frame 12 is slidably arranged with the support frame 5 through the connecting block to guide the support frame 12.

[0058] In the embodiment, the rear side of the support frame 12 is slidably connected with a guide frame, the rear side of the guide frame is bolted with the inside of the sofa seat frame 1, and the front side and the rear side of the top of the sofa seat frame 1 are bolted with armrests.

[0059] The support frame 12 is slidably arranged with the guide frame through the sliding rail to guide the support frame 12, ensure the smooth movement of the support frame 12, and avoid the inclination of the support frame 12.

[0060] Working principle: when the support frame 4 needs to be inclined, the left end of the worm 21 extends to the left side of the support frame 5 and is bolted with a hand wheel, the worm 21 can be rotated through the hand wheel, the worm 21 is rotatably arranged with the support frame 5 through a bearing, the stability of the rotation of the worm 21 is ensured, the worm 21 can drive the driving gear 22 to rotate, the driving gear 22 can drive the upper gear 23 to rotate, the upper gear 23 can drive the upper screw rod 24 to rotate, the upper screw rod 24 is rotatably arranged with the support frame 5 through a bearing, the resistance of the rotation of the upper screw rod 24 is reduced, the stability of the rotation of the upper screw rod 24 is ensured, the upper screw rod 24 can drive the upper sliding bar 25 to move left through threads, the driving gear 22 can drive the lower gear 26 to rotate, the lower gear 26 can drive the lower screw rod 27 to rotate, the lower screw rod 27 is rotatably arranged with the support frame 5 through a bearing, the resistance of the rotation of the lower screw rod 27 is reduced, the stability of the rotation of the lower screw rod 27 is ensured, the lower screw rod 27 can drive the lower sliding bar 28 to move right through threads, the upper sliding bar 25 can drive the top end of the left side of the chain 29 to move left, the lower sliding bar 28 can drive the bottom end of the left side of the chain 29 to move right, the upper sliding bar 25 and the lower sliding bar 28 can drive the chain 29 to rotate counterclockwise, the chain 29 can drive the sprocket 6 to rotate counterclockwise, the sprocket 6 can drive the transmission gear 7 to rotate counterclockwise, the transmission gear 7 is rotatably arranged with the support frame 5 through a bearing, the stability of the rotation of the transmission gear 7 is ensured, the transmission gear 7 can drive the adjusting gear 8 to rotate clockwise, and the adjusting gear 8 can drive the support frame 4 to rotate right.

[0061] The worm 21 can drive the worm wheel 31 to rotate clockwise, the worm wheel 31 is rotationally arranged with the support frame 5 through a bearing, the stability of the rotation of the worm wheel 31 is guaranteed, the worm wheel 31 and the sliding ring 32 are in an eccentric structure, the protrusion of the worm wheel 31 is slidingly arranged in the inside of the sliding ring 32, the worm wheel 31 can drive the sliding ring 32 to move leftwards, the sliding ring 32 can drive the rack 33 to move leftwards, the rack 33 can drive the rotating shaft 34 to rotate, the rotating shaft 34 is rotationally arranged with the support frame 5 through a bearing, the stability of the rotation of the rotating shaft 34 is guaranteed, the rotating shaft 34 can drive the large bevel gear 35 to rotate, the large bevel gear 35 and the small bevel gear 36 are both bevel gears, the large bevel gear 35 can mesh with the small bevel gear 36, the large bevel gear 35 can drive the small bevel gear 36 to rotate counterclockwise, the small bevel gear 36 can drive the driving wheel 9 to rotate counterclockwise, the driving wheel 9 can drive the transmission belt 10 to rotate counterclockwise, the guide wheel 11 can guide the transmission belt 10 to rotate stably, the transmission belt 10 can drive the support frame 12 to move rightwards, the support frame 12 is slidingly arranged with the support frame 5 through a slide rail, the support frame 12 can drive the air cylinder 13 to move rightwards, the support ring 14 is driven to rotate leftwards during the downward rotation of the leaning frame 4, the protrusion at the output end of the air cylinder 13 is slidingly arranged in the inside of the support ring 14 and extrudes the air cylinder 13 downward, when the leaning frame 4 is in a horizontal state, the air cylinder 13 is closed, the support frame 12 supports and stabilizes the leaning frame 4 through the air cylinder 13.

[0062] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. An adjustable sofa, comprising a sofa seat frame (1), characterized in that: The right side of the sofa seat frame (1) is hinged with a backrest frame (4), the top end of the sofa seat frame (1) is bolted with a support frame (5), the right side of the support frame (5) is rotatably connected to a transmission gear (7), the surface of the transmission gear (7) is bolted with a sprocket (6), the teeth of the top of the transmission gear (7) are meshed with an adjustment gear (8), the adjustment gear (8) is bolted to the backrest frame (4), the interior of the support frame (5) is rotatably connected to a driving wheel (9), the internal transmission of the driving wheel (9) is connected to a transmission belt (10), and the transmission belt (10) The right side of the interior is connected to a guide wheel (11), the guide wheel (11) is connected to the support frame (5) in a rotatable manner, the bottom of the support frame (5) is connected to a support frame (12) in a sliding manner, the hole on the right side of the top of the support frame (12) is bolted to the support assembly, the support assembly is bolted to the support frame (4), the support frame (12) is bolted to the transmission belt (10), the teeth of the sprocket (6) are engaged with the adjustment mechanism (2), the teeth of the adjustment mechanism (2) are engaged with the transmission mechanism (3), and the transmission mechanism (3) is bolted to the driving wheel (9); The adjusting mechanism (2) comprises a worm (21), a driving gear (22), an upper gear (23), an upper screw (24) and an upper slide (25). Both ends of the surface of the worm (21) are rotatably sleeved with the interior of the support frame (5). The right end of the worm (21) is bolted to the axis on the left side of the driving gear (22). The teeth on the top of the driving gear (22) are meshed with the teeth of the upper gear (23). The axis on the right side of the upper gear (23) is bolted to the left end of the upper screw (24). The left end of the surface of the upper screw (24) is rotatably sleeved with the interior of the support frame (5). The right end of the upper screw (24) is threadedly connected to the screw hole on the left side of the upper slide (25). The adjusting mechanism (2) also comprises a transmission assembly meshed with the transmission gear (7). The worm (21) is meshed with the transmission mechanism (3). The transmission assembly comprises a lower gear (26), a lower screw (27), a lower slide (28) and a chain (29), the teeth of the lower gear (26) mesh with the teeth at the bottom of the driving gear (22), the axis on the right side of the lower gear (26) is bolted to the left end of the lower screw (27), the left end of the surface of the lower screw (27) is rotatably sleeved with the inside of the support frame (5), the right end of the lower screw (27) is threadedly connected to the screw hole on the left side of the lower slide (28), the right end of the lower slide (28) is bolted to the bottom end of the left side of the chain (29), the top end of the left side of the chain (29) is bolted to the right end of the upper slide (25), and the inside of the chain (29) meshes with the teeth of the sprocket (6); The transmission mechanism (3) includes a worm wheel (31), a sliding ring (32) and a rack (33); the top of the worm wheel (31) is meshed with the surface of the worm (21); the axis of the worm wheel (31) is connected to the inside of the support frame (5) for rotation; the right end of the surface of the worm wheel (31) is connected to the inside of the sliding ring (32) for sliding; the right side of the sliding ring (32) is bolted to the left end of the rack (33); the transmission mechanism (3) also includes a connecting component meshed with the rack (33); The connecting assembly comprises a rotating shaft (34), a large bevel gear (35) and a small bevel gear (36); the teeth of the rack (33) mesh with the teeth of the rotating shaft (34); the surface of the rotating shaft (34) is rotatably sleeved with the interior of the support frame (5); the bottom end of the rotating shaft (34) is bolted to the axis of the top of the large bevel gear (35); the teeth of the large bevel gear (35) mesh with the teeth of the small bevel gear (36); and the rear side of the small bevel gear (36) is bolted to the surface of the driving wheel (9).

2. The adjustable sofa according to claim 1, characterized in that: The rear side of the upper slide bar (25) is slidably connected to the limit frame, the interior of the limit frame is slidably connected to the rear side of the lower slide bar (28), the rear side of the limit frame is bolted to the interior of the support frame (5), and the chain (29) is in a U-shaped structure.

3. The adjustable sofa according to claim 1, characterized in that: The rear side of the rack (33) is slidably connected to a sliding frame, and the rear side of the sliding frame is bolted to the inside of the support frame (5). The sliding ring (32) and the rack (33) are both located on the front side of the worm (21). The top end of the rotating shaft (34) is bolted to a gear ring, which is engaged with the rack (33).

4. The adjustable sofa according to claim 1, characterized in that: The support assembly comprises a cylinder (13) and a support ring (14); the surface of the cylinder (13) is bolted to the hole on the right side of the top of the support frame (12); the protrusion at the output end of the cylinder (13) is slidably connected to the inside of the support ring (14); and the left side of the support ring (14) is bolted to the right side of the support frame (4).

5. The adjustable sofa according to claim 4, characterized in that: Both sides of the bottom of the support frame (12) are rotatably connected to walking wheels. The support frame (12) has a C-shaped structure. The top of the support frame (12) is bolted with a connecting block, and the surface of the connecting block is slidably connected to the sliding opening at the bottom of the support frame (5).

6. The adjustable sofa according to claim 1, characterized in that: The rear side of the support frame (12) is slidably connected to a guide frame, the rear side of the guide frame is bolted to the inside of the sofa seat frame (1), and the front and rear sides of the top of the sofa seat frame (1) are both bolted to armrests.

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