Electric sofa bed frame structure

Abstract

The present invention belongs to the field of furniture, and in particular to an electric sofa bed frame structure. In view of the problem that when the existing sofa bed is actually used, people need to spend a lot of force to unfold or store it. The following scheme is proposed, which includes a support box, an L-shaped frame is slidably connected to the support box, and the right side of the L-shaped frame extends to the right side of the support box, and the left side of the L-shaped frame is rotatably connected to a backing plate, and the top of the L-shaped frame and the right side of the backing plate are fixedly installed with pads, and the top of the backing plate extends to the top of the support box and is connected with a lifting component, and the bottom of the lifting component is connected to the left side of the support box. By starting a driving motor, the present invention can push the L-shaped frame to the right side and rotate the backing plate to a horizontal state, so that the sofa bed can be automatically unfolded, and the sofa bed can be unfolded instead of manually, so the manual operation steps can be reduced, and it has good convenience.

Description

Technical Field

[0001] The invention relates to the technical field of furniture, and in particular to a frame structure of an electric sofa bed. Background Art

[0002] A sofa bed is a piece of furniture that can be used as both a sofa and a bed. Modern living room layout advocates simplicity, and multifunctional furniture is becoming more and more popular. Sofa beds are one of them. In small-sized rooms, a sofa bed is necessary to meet the living needs of occasional visitors. Usually, a sofa bed can be placed in the living room or study and serve as a seat. When guests come at night, the sofa bed can be unfolded and covered with bedding to make it a bed.

[0003] The current sofa bed is mainly unfolded by manual dragging. In actual use, whether it is unfolded or folded, people need to spend a lot of force to unfold or fold. Therefore, we propose an electric sofa bed frame structure to solve the above problems. Summary of the invention

[0004] Based on the background technology, there is a technical problem that when a sofa bed is actually used, whether it is unfolded or stored, people need to spend a lot of force to unfold or store it. The present invention proposes an electric sofa bed frame structure.

[0005] The electric sofa bed frame structure proposed by the present invention comprises a support box, an L-shaped frame is slidably connected to the support box, and the right side of the L-shaped frame extends to the right side of the support box, and the left side of the L-shaped frame is rotatably connected to a back plate, the top of the L-shaped frame and the right side of the back plate are fixedly installed with a pad, and the top of the back plate extends to the top of the support box and is connected with a lifting assembly, the bottom of the lifting assembly is connected to the left side of the support box, a drive shaft is rotatably connected through the left inner wall of the support box, and the left end of the drive shaft is connected to the lifting assembly, a transmission assembly is installed on the bottom inner wall of the support box, and a drive motor is fixedly installed on the bottom inner wall of the support box, the output shaft of the drive motor is connected to the transmission assembly, a fixing plate is fixedly installed on the bottom right inner wall of the support box, and a transmission rod is slidably connected through the fixing plate, the right end of the transmission rod is fixedly connected to the L-shaped frame, and the transmission rod and the driving shaft are both connected to the transmission assembly.

[0006] By means of the above structure, the driving motor can be started to drive the transmission component to operate. When the transmission component is in operation, the driving shaft can be driven to rotate and the transmission rod can be driven to the right side respectively. When the driving shaft rotates, the lifting component can be driven to operate, thereby lowering the height of the backrest plate. When the transmission rod moves to the right side, the L-shaped frame can be moved to the right side, thereby enabling the backrest plate to rotate in a horizontal direction, that is, the sofa bed can be unfolded. Therefore, the technical solution adopts an electric drive method to unfold the sofa bed, thereby reducing manual operation and having good convenience.

[0007] Preferably, the lifting assembly includes a support plate, a threaded member, a driven bevel gear and a connecting bevel gear. The support plate is fixedly mounted on the left bottom of the support box, and the threaded member is mounted on the top of the support plate. The driven bevel gear is connected to the threaded member, and the connecting bevel gear is fixedly mounted on the left end of the drive shaft. The connecting bevel gear is meshed with the driven bevel gear, and the top end of the threaded member is rotatably connected to the top of the support plate.

[0008] Furthermore, when the connecting bevel gear rotates with the driving shaft, the threaded member can be operated under the meshing transmission of the driven bevel gear, thereby reducing the height of the backing plate.

[0009] Preferably, the threaded component includes a support tube, a threaded column, a nut and a connecting block. The support tube is rotatably connected to the top of the support plate, and the driven bevel gear is fixedly sleeved on the support tube. The nut is fixedly installed on the top of the support tube, and the connecting block is rotatably connected to the support plate. The threaded column is fixedly installed on the bottom of the connecting block, and the threaded column passes through the nut and is threadedly connected to the nut.

[0010] Furthermore, when the support tube rotates along with the driven bevel gear, the nut can be driven to rotate. At this time, under the thread transmission effect with the threaded column, the height of the support plate can be adjusted downward.

[0011] Preferably, the transmission assembly includes a worm gear component, a bevel gear plate, a rotating bevel gear and a driving component, and the worm gear component is installed on the bottom inner wall of the support box, the output shaft of the drive motor is connected to the worm gear component, and the worm gear component is connected to the bevel gear plate, the rotating bevel gear is fixedly installed on the right end of the drive shaft, and the rotating bevel gear is meshed with the bevel gear plate, and the driving component is installed on the top left side of the bevel gear plate, the left end of the transmission rod is connected to the driving component, a positioning assembly is installed at the bottom of the bevel gear plate, and the positioning assembly is connected to the bottom inner wall of the support box, and the positioning assembly is connected to the left side of the fixed plate.

[0012] Furthermore, after starting the drive motor, the worm gear component can be driven to operate, so that the bevel gear plate can be rotated. At this time, under the meshing transmission action of the rotating bevel gear, the drive shaft can be driven to rotate, and when the bevel gear plate rotates, the transmission rod can be driven to move to the right under the power transmission of the drive component.

[0013] Preferably, the worm gear component includes a rotating shaft, a worm and a worm wheel, the rotating shaft is rotatably connected to the bottom inner wall of the support box, and the top of the rotating shaft is fixedly connected to the bottom of the bevel gear disk, and the worm is fixedly sleeved on the output shaft of the drive motor, the worm wheel is fixedly sleeved on the rotating shaft, and the worm is meshed with the worm wheel.

[0014] Furthermore, when the worm rotates along with the output shaft of the driving motor, the rotating shaft can be driven to rotate under the meshing transmission of the worm wheel, and the bevel gear can be driven to rotate.

[0015] Preferably, the driving member includes a stopper shaft and a rectangular ring, and the stopper shaft is fixedly mounted on the top left side of the bevel gear disk, the rectangular ring is fixedly mounted on the left end of the transmission rod, and the stopper shaft passes through the rectangular ring and contacts the inner wall of the rectangular ring.

[0016] Furthermore, when the stop shaft performs an arc motion along with the bevel gear plate, the transmission rod can be moved to the right side driven by the rectangular ring.

[0017] Preferably, the positioning assembly includes a screw rod, a threaded ring, a braking component, a limiting component and a gear component, and the screw rod is rotatably connected to the bottom right inner wall of the support box, the threaded ring is sleeved on the screw rod and threadedly connected to the screw rod, and the limiting component is respectively connected to the left side of the threaded ring and the bottom inner wall of the support box, the braking component is respectively connected to the right side of the threaded ring and the left side of the fixed plate, and the gear component is respectively connected to the top end of the screw rod and the bottom of the bevel gear disk.

[0018] Furthermore, when the bevel gear disk rotates, the screw rod can be rotated under the transmission action of the gear component, so that the threaded ring can move downward, and when the threaded ring moves, the position of the brake assembly can be adjusted, so that the bevel gear disk can be braked after the rotation of the bevel gear disk is completed.

[0019] Preferably, the braking component includes a connecting box, a compression spring, a support rod, a clamping wheel and two inclined clamping plates, and the connecting box is fixedly installed on the right side of the threaded ring, the left end of the support rod extends into the connecting box and is slidably connected to the inner wall of the connecting box, and the left and right ends of the compression spring are respectively fixedly connected to the left inner wall of the connecting box and the left end of the support rod, and the clamping wheel is rotatably connected to the right end of the support rod, the two inclined clamping plates are symmetrically fixedly installed on the left side of the fixed plate, and the clamping wheel is detachably clamped to the two inclined clamping plates.

[0020] Furthermore, the compression spring can be used to elastically support the clamping wheel through the support rod, and two inclined clamping plates are used to clamp the two clamping wheels respectively, so that stable braking can be achieved when the sofa bed is folded or unfolded.

[0021] Preferably, the limiting component includes a limiting rod and a limiting ring, the limiting rod is fixedly mounted on the bottom inner wall of the support box, and the limiting ring is fixedly mounted on the left side of the threaded ring, the limiting rod passes through the limiting ring and is slidably connected to the inner wall of the limiting ring.

[0022] Furthermore, by utilizing the sliding connection between the limiting rod and the limiting ring, the threaded ring can be longitudinally limited in sliding, thereby enabling the threaded ring to move vertically in the longitudinal direction.

[0023] Preferably, the gear component includes a gear ring and a rotating gear, and the gear ring is fixedly mounted on the bottom of the bevel gear disk, the rotating gear is fixedly mounted on the top of the screw rod, and the rotating gear is meshed with the gear ring.

[0024] Furthermore, the gear ring rotates along with the bevel gear disc, thereby being able to drive the screw rod to rotate under the meshing transmission action of the rotating gear.

[0025] The beneficial effects of the present invention are:

[0026] 1. In the present invention, the worm is driven to rotate by a driving motor. At this time, the rotating shaft can be driven to rotate under the meshing transmission of the worm wheel, so that the bevel gear plate can be rotated. When the bevel gear plate rotates, the driving shaft can be driven to rotate under the meshing transmission of the rotating bevel gear. At this time, the supporting tube can be driven to rotate under the meshing transmission of the connecting bevel gear and the driven bevel gear, so that the nut can be rotated. At this time, under the thread transmission with the threaded column, the threaded column can be moved downward, so that the height of the left side of the support plate can be reduced;

[0027] 2. In the present invention, when the bevel gear plate rotates, the rectangular ring can be pushed to move to the right by the blocking shaft, so that the transmission rod can move to the right. At this time, under the push of the transmission rod, the L-shaped frame can move to the right, and under the pull of the L-shaped frame, the backing plate can be rotated in the horizontal direction until the backing plate rotates to the horizontal direction, so that it can be kept flush with the L-shaped frame;

[0028] 3. In the present invention, when the bevel gear disk rotates, the gear ring can be driven to rotate, so that the screw rod can be rotated under the meshing transmission action of the rotating gear. When the screw rod rotates, the threaded ring can be moved downward, so that the clamping wheel and the inclined clamping plate located above can be disengaged. When the back plate is rotated to a horizontal position, the clamping wheel and the inclined clamping plate located below can be clamped, and under the push of the elastic force of the compression spring, the clamping wheel and the inclined clamping plate can be stably clamped, so that the bevel gear disk can be stably braked, so that the back plate and the L-shaped frame can be in a stable state.

[0029] The present invention can push the L-shaped frame to the right by starting the driving motor, and can simultaneously rotate the backrest plate to a horizontal state, so that the sofa bed can be automatically unfolded, and manual unfolding of the sofa bed can be replaced, thereby reducing manual operation steps and having good convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural front view of an electric sofa bed frame structure proposed by the present invention;

[0031] Figure 2 The invention provides an electric sofa bed frame structure. Figure 1 Schematic diagram of the structure of part A;

[0032] Figure 3 The invention provides an electric sofa bed frame structure. Figure 1 Schematic diagram of the structure of part B;

[0033] Figure 4 A three-dimensional diagram of the L-shaped frame and backboard connection structure of an electric sofa bed frame structure proposed by the present invention;

[0034] Figure 5 A three-dimensional diagram of the connection structure of a bevel gear plate, a stopper shaft, a rectangular ring and a transmission rod of an electric sofa bed frame structure proposed by the present invention;

[0035] Figure 6 A three-dimensional diagram of the gear ring, rotating gear and screw rod connection structure of an electric sofa bed frame structure proposed by the present invention;

[0036] Figure 7 This is a front view of the internal structure of a connection box of an electric sofa bed frame structure proposed by the present invention.

[0037] In the figure: 1. support box; 2. L-shaped frame; 3. backing plate; 4. protective pad; 5. support plate; 6. support tube; 7. driven bevel gear; 8. driving shaft; 9. connecting bevel gear; 10. nut; 11. threaded column; 12. rotating bevel gear; 13. bevel gear plate; 14. stop shaft; 15. rectangular ring; 16. transmission rod; 17. gear ring; 18. fixing plate; 19. rotating shaft; 20. worm; 21. driving motor; 22. lead screw; 23. rotating gear; 24. threaded ring; 25. limiting ring; 26. limiting rod; 27. connecting box; 28. inclined clamping plate; 29. ​​worm gear; 30. support rod; 31. clamping wheel; 32. compression spring. DETAILED DESCRIPTION

[0038] The present invention will be further explained below in conjunction with specific embodiments.

[0039] refer to Figure 1-7 In this embodiment, an electric sofa bed frame structure is proposed, including a support box 1, an L-shaped frame 2 is slidably connected to the support box 1, and the right side of the L-shaped frame 2 extends to the right side of the support box 1, and the left side of the L-shaped frame 2 is rotatably connected to a back plate 3, and the top of the L-shaped frame 2 and the right side of the back plate 3 are fixedly installed with a pad 4, and the top of the back plate 3 extends to the top of the support box 1 and is connected with a lifting component, the bottom of the lifting component is connected to the left side of the support box 1, and a drive shaft 8 is rotatably connected through the left inner wall of the support box 1, and the left end of the drive shaft 8 is connected to the lifting component, a transmission component is installed on the bottom inner wall of the support box 1, and a drive motor 21 is fixedly installed on the bottom inner wall of the support box 1, and the output shaft of the drive motor 21 is connected to the transmission component, a fixed plate 18 is fixedly installed on the bottom right inner wall of the support box 1, and a transmission rod 16 is slidably connected through the fixed plate 18, the right end of the transmission rod 16 is fixedly connected to the L-shaped frame 2, and the transmission rod 16 and the drive shaft 8 are both connected to the transmission component.

[0040] By means of the above structure, the driving motor 21 can be started to drive the transmission component to operate. When the transmission component is operating, the driving shaft 8 can be driven to rotate and the transmission rod 16 can be driven to the right side. When the driving shaft 8 rotates, the lifting component can be driven to operate, thereby lowering the height of the backrest 3. When the transmission rod 16 moves to the right side, the L-shaped frame 2 can be moved to the right side, thereby enabling the backrest 3 to rotate in the horizontal direction, that is, the sofa bed can be unfolded. Therefore, the technical solution adopts an electric drive method to unfold the sofa bed, thereby reducing manual operation and having good convenience.

[0041] In this embodiment, the lifting assembly includes a support plate 5, a threaded member, a driven bevel gear 7 and a connecting bevel gear 9. The support plate 5 is fixedly installed on the left bottom of the support box 1, and the threaded member is installed on the top of the support plate 5. The driven bevel gear 7 is connected to the threaded member, and the connecting bevel gear 9 is fixedly installed on the left end of the drive shaft 8. The connecting bevel gear 9 is meshed with the driven bevel gear 7, and the top end of the threaded member is rotatably connected to the top of the support plate 3.

[0042] When the connecting bevel gear 9 rotates with the driving shaft 8, the threaded member can be operated under the meshing transmission action of the driven bevel gear 7, so that the height of the back plate 3 can be reduced.

[0043] In this embodiment, the threaded component includes a support tube 6, a threaded column 11, a nut 10 and a connecting block. The support tube 6 is rotatably connected to the top of the support plate 5, and the driven bevel gear 7 is fixedly sleeved on the support tube 6. The nut 10 is fixedly installed on the top of the support tube 6, and the connecting block is rotatably connected to the support plate 3. The threaded column 11 is fixedly installed at the bottom of the connecting block, and the threaded column 11 passes through the nut 10 and is threadedly connected to the nut 10.

[0044] When the support tube 6 rotates along with the driven bevel gear 7 , the nut 10 can be driven to rotate. At this time, under the thread transmission effect with the threaded column 11 , the height of the support plate 3 can be adjusted downward.

[0045] In this embodiment, the transmission assembly includes a worm gear component, a bevel gear 13, a rotating bevel gear 12 and a driving component, and the worm gear component is installed on the bottom inner wall of the support box 1, the output shaft of the drive motor 21 is connected to the worm gear component, and the worm gear component is connected to the bevel gear 13, the rotating bevel gear 12 is fixedly installed on the right end of the drive shaft 8, and the rotating bevel gear 12 is meshed with the bevel gear 13, and the driving component is installed on the top left side of the bevel gear 13, the left end of the transmission rod 16 is connected to the driving component, and a positioning component is installed at the bottom of the bevel gear 13, and the positioning component is connected to the bottom inner wall of the support box 1, and the positioning component is connected to the left side of the fixed plate 18.

[0046] After starting the drive motor 21, the worm gear component can be driven to operate, so that the bevel gear 13 can be rotated. At this time, under the meshing transmission action of the rotating bevel gear 12, the drive shaft 8 can be driven to rotate, and when the bevel gear 13 rotates, the drive rod 16 can be driven to move to the right under the power transmission of the drive component.

[0047] In this embodiment, the worm gear component includes a rotating shaft 19, a worm 20 and a worm wheel 29. The rotating shaft 19 is rotatably connected to the bottom inner wall of the support box 1, and the top of the rotating shaft 19 is fixedly connected to the bottom of the bevel gear plate 13, and the worm 20 is fixedly sleeved on the output shaft of the drive motor 21, and the worm wheel 29 is fixedly sleeved on the rotating shaft 19, and the worm 20 is meshed with the worm wheel 29.

[0048] When the worm 20 rotates along with the output shaft of the driving motor 21 , the rotating shaft 19 can be driven to rotate under the meshing transmission of the worm wheel 29 , and the bevel gear plate 13 can be driven to rotate.

[0049] In this embodiment, the driving component includes a stopper shaft 14 and a rectangular ring 15, and the stopper shaft 14 is fixedly installed on the top left side of the bevel gear plate 13, the rectangular ring 15 is fixedly installed on the left end of the transmission rod 16, and the stopper shaft 14 passes through the rectangular ring 15 and contacts the inner wall of the rectangular ring 15.

[0050] When the blocking shaft 14 performs arc motion along with the bevel gear plate 13 , the driving rod 16 can be moved to the right side driven by the rectangular ring 15 .

[0051] In this embodiment, the positioning assembly includes a screw rod 22, a threaded ring 24, a braking component, a limiting component and a gear component, and the screw rod 22 is rotatably connected to the bottom right inner wall of the support box 1, the threaded ring 24 is sleeved on the screw rod 22 and threadedly connected to the screw rod 22, and the limiting component is respectively connected to the left side of the threaded ring 24 and the bottom inner wall of the support box 1, the braking component is respectively connected to the right side of the threaded ring 24 and the left side of the fixed plate 18, and the gear component is respectively connected to the top of the screw rod 22 and the bottom of the bevel gear disk 13.

[0052] When the bevel gear 13 rotates, the screw rod 22 can be rotated under the transmission action of the gear component, so that the threaded ring 24 can move downward, and when the threaded ring 24 moves, the position of the brake assembly can be adjusted, so that the bevel gear 13 can be braked after the bevel gear 13 finishes rotating.

[0053] In this embodiment, the braking component includes a connecting box 27, a compression spring 32, a support rod 30, a clamping wheel 31 and two inclined clamping plates 28, and the connecting box 27 is fixedly installed on the right side of the threaded ring 24, the left end of the support rod 30 extends into the connecting box 27 and is slidingly connected to the inner wall of the connecting box 27, and the left and right ends of the compression spring 32 are respectively fixedly connected to the left inner wall of the connecting box 27 and the left end of the support rod 30, and the clamping wheel 31 is rotatably connected to the right end of the support rod 30, the two inclined clamping plates 28 are symmetrically fixedly installed on the left side of the fixed plate 18, and the clamping wheel 31 is detachably clamped to the two inclined clamping plates 28.

[0054] The compression spring 32 can be used to elastically support the clamping wheel 31 through the support rod 30, and two inclined clamping plates 28 are used to clamp the two clamping wheels 31 respectively, so that stable braking can be achieved when the sofa bed is folded or unfolded.

[0055] In this embodiment, the limiting component includes a limiting rod 26 and a limiting ring 25. The limiting rod 26 is fixedly installed on the bottom inner wall of the support box 1, and the limiting ring 25 is fixedly installed on the left side of the threaded ring 24. The limiting rod 26 passes through the limiting ring 25 and is slidably connected to the inner wall of the limiting ring 25.

[0056] By utilizing the sliding connection between the limiting rod 26 and the limiting ring 25 , the threaded ring 24 can be longitudinally limited in sliding, thereby enabling the threaded ring 24 to move vertically in the longitudinal direction.

[0057] In this embodiment, the gear member includes a gear ring 17 and a rotating gear 23 , and the gear ring 17 is fixedly mounted on the bottom of the bevel gear plate 13 , and the rotating gear 23 is fixedly mounted on the top of the screw rod 22 , and the rotating gear 23 meshes with the gear ring 17 .

[0058] The gear ring 17 rotates along with the bevel gear plate 13 , so that the screw rod 22 can be driven to rotate under the meshing transmission action of the rotating gear 23 .

[0059] In this embodiment, the worm 20 is driven to rotate by the driving motor 21. At this time, under the meshing transmission action of the worm wheel 29, the rotating shaft 19 can be driven to rotate, so that the bevel gear plate 13 can be rotated. When the bevel gear plate 13 rotates, the driving shaft 8 can be driven to rotate under the meshing transmission action of the rotating bevel gear 12. At this time, under the meshing transmission action of the connecting bevel gear 9 and the driven bevel gear 7, the support tube 6 can be driven to rotate, so that the nut 10 can be rotated.

[0060] Under the threaded transmission action with the threaded column 11, the threaded column 11 can be moved downward, so as to reduce the height of the left side of the back plate 3. When the bevel gear plate 13 rotates, the rectangular ring 15 can be pushed to move to the right by the blocking shaft 14, so as to enable the transmission rod 16 to move to the right. At this time, under the push of the transmission rod 16, the L-shaped frame 2 can be moved to the right, and the back plate 3 can be rotated in the horizontal direction under the pulling of the L-shaped frame 2 until the back plate 3 rotates to the horizontal direction, so as to keep it flush with the L-shaped frame 2. When the bevel gear plate 13 rotates, the gear ring 17 can be driven to rotate, so that through the meshing transmission action of the rotating gear 23, The screw rod 22 rotates, and when the screw rod 22 rotates, the threaded ring 24 can be moved downward, so that the clamping wheel 31 and the inclined clamping plate 28 located above can be disengaged from the clamping. When the back plate 3 rotates to a horizontal position, the clamping wheel 31 and the inclined clamping plate 28 located below can be clamped, and under the elastic force of the compression spring 32, the clamping wheel 31 and the inclined clamping plate 28 can be stably clamped, so that the bevel gear plate 13 can be stably braked, so that the back plate 3 and the L-shaped frame 2 are in a stable state, so that the sofa bed can be automatically unfolded, and the sofa bed can be unfolded instead of manually, so the manual operation steps can be reduced, which has good convenience.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric sofa bed frame structure, comprising a support box (1), characterized in that: The support box (1) is slidably connected to an L-shaped frame (2), and the right side of the L-shaped frame (2) extends to the right side of the support box (1), and the left side of the L-shaped frame (2) is rotatably connected to a backing plate (3), and a pad (4) is fixedly installed on the top of the L-shaped frame (2) and the right side of the backing plate (3), and the top of the backing plate (3) extends to the top of the support box (1) and is connected to a lifting component, and the bottom of the lifting component is connected to the left side of the support box (1), and a drive shaft (8) is rotatably connected to the left inner wall of the support box (1), and the drive shaft (8) The left end is connected to the lifting assembly, a transmission assembly is installed on the bottom inner wall of the support box (1), and a drive motor (21) is fixedly installed on the bottom inner wall of the support box (1), and the output shaft of the drive motor (21) is connected to the transmission assembly, a fixing plate (18) is fixedly installed on the right inner wall of the bottom of the support box (1), and a transmission rod (16) is slidably connected to the fixing plate (18), the right end of the transmission rod (16) is fixedly connected to the L-shaped frame (2), and the transmission rod (16) and the drive shaft (8) are both connected to the transmission assembly; The lifting assembly comprises a support plate (5), a threaded member, a driven bevel gear (7) and a connecting bevel gear (9); the support plate (5) is fixedly mounted on the left bottom of the support box (1), and the threaded member is mounted on the top of the support plate (5); the driven bevel gear (7) is connected to the threaded member, and the connecting bevel gear (9) is fixedly mounted on the left end of the driving shaft (8); the connecting bevel gear (9) is meshed with the driven bevel gear (7), and the top end of the threaded member is rotatably connected to the top of the support plate (3); The transmission assembly comprises a worm gear component, a bevel gear (13), a rotating bevel gear (12) and a driving component, wherein the worm gear component is mounted on the bottom inner wall of the support box (1), the output shaft of the drive motor (21) is connected to the worm gear component, and the worm gear component is connected to the bevel gear (13), the rotating bevel gear (12) is fixedly mounted on the right end of the drive shaft (8), and the rotating bevel gear (12) is meshed with the bevel gear (13), and the driving component is mounted on the top left side of the bevel gear (13), the left end of the transmission rod (16) is connected to the driving component, a positioning component is mounted on the bottom of the bevel gear (13), and the positioning component is connected to the bottom inner wall of the support box (1), and the positioning component is connected to the left side of the fixing plate (18); The worm gear component comprises a rotating shaft (19), a worm (20) and a worm wheel (29); the rotating shaft (19) is rotatably connected to the inner wall of the bottom of the supporting box (1); the top end of the rotating shaft (19) is fixedly connected to the bottom of the bevel gear plate (13); the worm (20) is fixedly sleeved on the output shaft of the driving motor (21); the worm wheel (29) is fixedly sleeved on the rotating shaft (19); and the worm (20) is meshed with the worm wheel (29); The positioning assembly comprises a screw (22), a threaded ring (24), a braking component, a limiting component and a gear component, wherein the screw (22) is rotatably connected to the right inner wall of the bottom of the support box (1), the threaded ring (24) is sleeved on the screw (22) and threadedly connected to the screw (22), and the limiting component is respectively connected to the left side of the threaded ring (24) and the inner wall of the bottom of the support box (1), the braking component is respectively connected to the right side of the threaded ring (24) and the left side of the fixing plate (18), and the gear component is respectively connected to the top of the screw (22) and the bottom of the bevel gear disc (13); The braking component comprises a connection box (27), a compression spring (32), a support rod (30), a clamping wheel (31) and two inclined clamping plates (28), wherein the connection box (27) is fixedly mounted on the right side of the threaded ring (24), the left end of the support rod (30) extends into the connection box (27) and is slidably connected to the inner wall of the connection box (27), the left end and the right end of the compression spring (32) are respectively fixedly connected to the left inner wall of the connection box (27) and the left end of the support rod (30), and the clamping wheel (31) is rotatably connected to the right end of the support rod (30), the two inclined clamping plates (28) are symmetrically fixedly mounted on the left side of the fixed plate (18), and the clamping wheel (31) is detachably clamped to the two inclined clamping plates (28).

2. The electric sofa bed frame structure according to claim 1, characterized in that: The threaded component comprises a support tube (6), a threaded column (11), a nut (10) and a connecting block. The support tube (6) is rotatably connected to the top of the support plate (5), and the driven bevel gear (7) is fixedly sleeved on the support tube (6). The nut (10) is fixedly installed on the top of the support tube (6), and the connecting block is rotatably connected to the support plate (3). The threaded column (11) is fixedly installed on the bottom of the connecting block, and the threaded column (11) passes through the nut (10) and is threadedly connected to the nut (10).

3. The electric sofa bed frame structure according to claim 1, characterized in that: The driving member comprises a stopper shaft (14) and a rectangular ring (15), wherein the stopper shaft (14) is fixedly mounted on the top left side of the bevel gear plate (13), the rectangular ring (15) is fixedly mounted on the left end of the transmission rod (16), and the stopper shaft (14) passes through the rectangular ring (15) and contacts the inner wall of the rectangular ring (15).

4. The electric sofa bed frame structure according to claim 1, characterized in that: The limiting component comprises a limiting rod (26) and a limiting ring (25); the limiting rod (26) is fixedly mounted on the bottom inner wall of the support box (1), and the limiting ring (25) is fixedly mounted on the left side of the threaded ring (24); the limiting rod (26) passes through the limiting ring (25) and is slidably connected to the inner wall of the limiting ring (25).

5. The electric sofa bed frame structure according to claim 1, characterized in that: The gear component comprises a gear ring (17) and a rotating gear (23), wherein the gear ring (17) is fixedly mounted on the bottom of the bevel gear plate (13), the rotating gear (23) is fixedly mounted on the top of the screw rod (22), and the rotating gear (23) is meshed with the gear ring (17).

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