A leg rest structure of a vehicle seat and a vehicle seat

Abstract

The present invention discloses a leg rest structure for an automobile seat and an automobile seat, which include a seat mechanism and a leg rest mechanism. The seat mechanism includes a base body, and a support mechanism for supporting the leg rest mechanism is provided at the lower end of the base body. A filling mechanism for filling the gap between the leg rest mechanism and the base body is provided inside the leg rest mechanism. The present invention can fill the gap between the leg rest mechanism and the seat mechanism by providing the filling mechanism. The filling mechanism uses the driving mechanism as the main power source, and with the help of the air supplement mechanism, the filling airbag can be inflated, which can provide a good support effect for the user and reduce the discomfort caused by the lack of support. At the same time, when not in use, the gas inside the filling airbag can be quickly evacuated through the exhaust mechanism, so that it changes from the inflated state to the state of fitting on the folding plate, which can effectively reduce the difficulty of storage.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle seats, and particularly to a leg rest structure for a vehicle seat and a vehicle seat. Background Art

[0002] As an important component inside a vehicle, the vehicle seat not only undertakes the basic functions of supporting and protecting the driver and passengers, but also gradually incorporates more intelligent and comfortable designs with the progress of technology and the improvement of consumer demands. The comfort, safety, and intelligence levels of the seat have become one of the important indicators for measuring the quality of modern vehicles. As an important part of the vehicle seat, the core function of the leg rest is to expand the support range of the passenger's legs and optimize the riding experience. By finely adjusting the angle and height of the leg rest, passengers can obtain just the right leg support according to their personal needs, further enhancing the comfort of the seat.

[0003] In the existing vehicle seat designs, the leg rest mechanism is usually one of the important components for enhancing riding comfort. However, there are still some deficiencies in the design and function of the leg rest mechanism in the prior art, especially in terms of filling the gap between the leg rest mechanism and the seat mechanism after the leg rest mechanism is unfolded. When in use, since the lower leg part is located on the leg rest while the local area of the thigh is at the gap, discomfort will be caused after long-term use. The prior art often adopts relatively simple designs, such as fixed fillers. Although the fixed fillers can fill the gap, since they cannot be adjusted according to the needs of the user, the support effect is often poor and cannot meet the needs of users with different body types and usage habits. For this reason, we propose a leg rest structure for a vehicle seat and a vehicle seat. Summary of the Invention

[0004] The purpose of the present invention is to provide a leg rest structure for a vehicle seat and a vehicle seat to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A leg rest structure for a vehicle seat, comprising a seat mechanism and a leg rest mechanism. The seat mechanism includes a base body, and a support mechanism for supporting the leg rest mechanism is provided at the lower end of the base body. A filling mechanism for filling the gap between the leg rest mechanism and the base body is provided inside the leg rest mechanism. An air supplement mechanism for providing air source for the filling mechanism is provided inside the leg rest mechanism. An exhaust mechanism for quickly releasing the gas inside the filling mechanism is provided at one side of the air supplement mechanism inside the leg rest mechanism. A driving mechanism for providing a power source for both of them is provided at one side of the air supplement mechanism and the exhaust mechanism inside the leg rest mechanism.

[0006] Preferably, the seat mechanism further includes first side rests symmetrically and fixedly connected to the outer side wall of the base body, a backrest is provided on the side of the base body away from the filling mechanism, second side rests are symmetrically and fixedly connected to the outer side wall of the backrest, and square steel brackets are symmetrically and fixedly connected to the lower end face of the base body.

[0007] Preferably, the leg rest mechanism includes a frame, an elastic pad for supporting the human leg is fixedly connected to the end face of the frame, the filling mechanism includes a folding plate between the frame and the base body, a filling airbag for supporting the human body is fixedly connected to the upper end face of the folding plate, a first motor is fixedly connected to the center of the lower end face of the base body between the two square steel brackets, first drive rods are fixedly connected to the two output ends of the first motor, guide frames are fixedly connected to the ends of the two first drive rods, and guide grooves are formed in the outer side walls of the two guide frames.

[0008] Preferably, the support mechanism includes limit plates symmetrically and fixedly connected to the inner side wall of the frame, a first connecting rod is rotatably connected to the opposite sides of the two limit plates, second connecting rods are rotatably sleeved on the ends of the two first connecting rods, a third connecting rod is rotatably connected to the opposite sides of the two limit plates on one side of the first connecting rod, a fourth connecting rod is rotatably sleeved on the end of the third connecting rod, auxiliary plates are fixedly connected to the lower bottom ends of the two square steel brackets, the ends of the second connecting rod and the fourth connecting rod are rotatably sleeved with the two end points of the auxiliary plate, fixing brackets for reinforcement are fixedly connected to both sides of the auxiliary plate, and the ends of the fixing brackets are fixedly connected to the outer side wall of the square steel bracket. A positioning shaft is rotatably installed at the overlapping shadow part of the second connecting rod and the third connecting rod, and the positioning shaft is located inside the guide groove.

[0009] Preferably, the air supplement mechanism includes first bearing frames symmetrically and fixedly connected to the inner side wall of the frame, a crankshaft is rotatably sleeved inside the two first bearing frames through bearings, a first synchronous pulley is fixedly connected to the outer wall of the crankshaft, two crank rocker arms are rotatably sleeved inside the crankshaft, a positioning plate is fixedly connected to the inner side wall of the frame on one side of the first bearing frame, cylinders are symmetrically and fixedly connected to the inside of the positioning plate, one-way intake valves for facilitating gas entry are arranged on the outer walls of the two cylinders, pistons are slidably sleeved inside the cylinders, the other ends of the crank rocker arms are rotatably sleeved with the inside of the pistons, a three-way pipe is fixedly connected to the exhaust ends of the two cylinders, a first telescopic hose connected to the intake end of the filling airbag is fixedly connected to the end of the three-way pipe, and the first telescopic hose penetrates through the lower bottom end of the folding plate. A one-way outlet valve is arranged on the outer wall of the three-way pipe on one side of the first telescopic hose.

[0010] The cam is an assembly made of a plurality of gears, each of which is connected to a plurality of gears of the plurality of gears, and the plurality of gears are connected to the plurality of gears respectively.

[0011] Preferably: the driving mechanism includes a second motor fixedly connected to the inner wall of the frame, one of the output ends of the second motor is fixedly connected to the first driving shaft, the end of the first driving shaft is fixedly connected to the second gear, the inner wall of the frame is located on one side of the second motor and is rotatably sleeved with a main shaft through a bearing, the outer wall of the main shaft is fixedly sleeved with a third gear meshing with the second gear, the outer wall of the main shaft is symmetrically fixedly sleeved with an arc frame, and the ends of the two arc frames are fixedly connected to the lower bottom end of the folding plate.

[0012] Preferably: the inner wall of the frame is symmetrically fixedly connected with a positioning frame, the interior of the positioning frame is fixedly connected with a second electric push rod, the end of the second electric push rod is fixedly connected with a push plate, the outer wall of the main shaft is provided with a guide groove in a ring array, the outer wall of the main shaft is located at the position of the guide groove and a first gear disk is slidably sleeved on the outer wall of the main shaft, the end face of the first gear disk is fixedly connected with a ring, and the push plate is rotatably sleeved on the outer wall of the ring, the outer wall of the main shaft is rotatably sleeved with a second gear disk on the side opposite to the first gear disk, the side of the second gear disk away from the first gear disk is fixedly connected with a third synchronous wheel, and the third synchronous wheel is rotatably sleeved on the main shaft.

[0013] Preferably: the other output end of the second motor is fixedly connected to the second drive shaft, and the end of the second drive shaft is fixedly connected to the first synchronous wheel which is identical to the outer wall of the crank shaft, the outer walls of the two first synchronous wheels are sleeved with the second synchronous belt for transmission, and the outer walls of the third synchronous wheel and the second synchronous wheel are sleeved with the first synchronous belt for transmission.

[0014] A car seat comprises a leg support structure of the car seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention can achieve the gap filling between the leg rest mechanism and the seat mechanism by providing a filling mechanism. The filling mechanism uses the driving mechanism as the main power source and enables the filling airbag to expand with the help of the air supplement mechanism, which can provide a good supporting effect for the user and reduce the discomfort caused by the lack of support. At the same time, when not in use, the gas inside the filling airbag can be quickly evacuated through the exhaust mechanism, so that it changes from the expanded state to the state of fitting on the folding plate, which can effectively reduce the difficulty of storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the present invention;

[0018] Figure 2 Schematic diagram of the overall bottom structure of the present invention;

[0019] Figure 3 Schematic diagram of the main body structure of the base of the present invention;

[0020] Figure 4 Schematic diagram of the bottom structure of the main body of the base of the present invention;

[0021] Figure 5 Schematic diagram of the bottom structure of the frame of the present invention;

[0022] Figure 6 Schematic diagram of the structure of the driving mechanism of the present invention;

[0023] Figure 7 Schematic diagram of the structure of the exhaust mechanism of the present invention;

[0024] Figure 8 Schematic diagram of the structure of the air supplement mechanism of the present invention;

[0025] Figure 9 is Figure 2 Enlarged schematic diagram of part A in

[0026] Figure 10 is Figure 2 Enlarged schematic diagram of part B in

[0027] Figure 11 is Figure 3 Enlarged schematic diagram of part C in

[0028] Figure 12 is Figure 5 Enlarged schematic diagram of part D in

[0029] In the figure: 1. Seat mechanism; 11. Base main body; 12. First side recliner; 13. Backrest; 14. Second side recliner; 15. Square steel bracket; 16. Fixed bracket; 2. Leg rest mechanism; 21. Elastic pad; 22. Frame; 3. Filling mechanism; 31. Folding plate; 32. Filling airbag; 33. First motor; 34. First driving rod; 35. Guide frame; 36. Guide groove; 37. Positioning shaft; 4. Air replenishing mechanism; 41. First bearing bracket; 42. Crankshaft; 43. First synchronous pulley; 44. Crank rocker arm; 45. Positioning plate; 46. Cylinder; 461. Piston; 47. One-way intake valve; 48. Three-way pipe; 481. One-way exhaust valve; 482. First telescopic hose; 5. Exhaust mechanism; 51. Air frame; 52. Rotor; 53. Connecting pipe; 54. Electric control valve; 55. Second telescopic hose; 56. First gear; 57. First bevel gear; 58. Second bearing bracket; 581. Rotating rod; 59. Second bevel gear; 591. Second synchronous pulley; 6. Support mechanism; 61. Limiting plate; 62. First connecting rod; 63. Second connecting rod; 64. Third connecting rod; 65. Fourth connecting rod; 66. Auxiliary plate; 7. Driving mechanism; 71. Second motor; 72. First driving shaft; 73. Second driving shaft; 74. Second gear; 75. Third gear; 76. Main shaft; 761. Guide groove; 77. Arc-shaped frame; 78. Positioning frame; 781. Electric push rod; 782. Pushing plate; 783. First toothed disc; 784. Winding ring; 785. Second toothed disc; 786. Third synchronous pulley; 787. First synchronous belt; 79. Second synchronous belt. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1 - Figure 4 , the present invention provides a technical solution: a leg rest structure of an automobile seat, including a seat mechanism 1 and a leg rest mechanism 2. The seat mechanism 1 includes a base main body 11. A support mechanism 6 for supporting the leg rest mechanism 2 is provided at the lower end of the base main body 11. A filling mechanism 3 for filling the gap between the leg rest mechanism 2 and the base main body 11 is provided inside the leg rest mechanism 2. An air replenishing mechanism 4 for providing a gas source for the filling mechanism 3 is provided inside the leg rest mechanism 2. An exhaust mechanism 5 for quickly releasing the gas inside the filling mechanism 3 is provided on one side of the air replenishing mechanism 4 inside the leg rest mechanism 2. A driving mechanism 7 for providing a power source for both is provided on one side of the air replenishing mechanism 4 and the exhaust mechanism 5 inside the leg rest mechanism 2;

[0032] The seat mechanism 1 further includes a first side armrest 12 symmetrically and fixedly connected to the outer sidewall of the base main body 11. A backrest 13 is provided on the side of the base main body 11 away from the filling mechanism 3. Second side armrests 14 are symmetrically and fixedly connected to the outer sidewall of the backrest 13. Square steel brackets 15 are symmetrically and fixedly connected to the lower end face of the base main body 11.

[0033] It should be noted that the support mechanism 6 at the lower end of the base main body 11 provides a stable support for the leg rest mechanism 2, ensuring the safety and comfort of passengers when using the leg rest. The setting of the filling mechanism 3 effectively fills the gap between the leg rest mechanism 2 and the base main body 11, not only enhancing the overall structural strength of the leg rest mechanism 2, but also improving the support effect on the legs of passengers, reducing the fatigue during long-distance driving. The introduction of the air supplement mechanism 4 provides a continuous and stable air source for the filling mechanism 3, enabling the filling mechanism 3 to be flexibly adjusted according to the needs of passengers, further enhancing the riding comfort and personalized experience. The setting of the exhaust mechanism 5 allows the gas inside the filling mechanism 3 to be quickly released, facilitating the rapid restoration of the leg rest mechanism 2 to its initial state when passengers do not need leg rest support, improving the flexibility and convenience of the seat. The equipped drive mechanism 7 provides a reliable power source for the air supplement mechanism 4 and the exhaust mechanism 5, ensuring their stable and efficient operation, thus guaranteeing the overall performance of the leg rest mechanism 2 and the riding experience of passengers.

[0034] Please refer to Figure 2 - Figure 4 The leg rest mechanism 2 includes a frame 22. An elastic pad 21 for supporting the human leg is fixedly connected to the end face of the frame 22. The filling mechanism 3 includes a folding plate 31 located between the frame 22 and the base main body 11. A filling airbag 32 for supporting the human body is fixedly connected to the upper end face of the folding plate 31. A first motor 33 is fixedly connected to the center of the lower end face of the base main body 11 between the two square steel brackets 15. Two output ends of the first motor 33 are fixedly connected to first drive rods 34. Guide frames 35 are fixedly connected to the ends of the two first drive rods 34. Guide grooves 36 are formed on the outer sidewalls of the two guide frames 35.

[0035] It should be noted that the frame 22, as the main structure of the leg rest mechanism 2, is fixedly connected with an elastic pad 21 at its end face. The elastic pad 21 not only provides soft support for the human leg, but also enhances the riding comfort. The material and design of the elastic pad 21 can well adapt to the leg shapes and sitting postures of different passengers, further improving the riding experience. The folding plate 31 located between the frame 22 and the base body 11 effectively fills the gap between the two through its special structural design, while enhancing the overall stability of the leg rest mechanism 2. The setting of the filling airbag 32 further improves the support effect of the leg rest, enabling passengers to feel more uniform and comfortable leg support during the ride.

[0036] Please refer to Figure 2 - Figure 11 , the support mechanism 6 includes limit plates 61 symmetrically and fixedly connected to the inner side walls of the frame 22. A first connecting rod 62 is rotatably connected to the opposite sides of the two limit plates 61. The ends of the two first connecting rods 62 are rotatably sleeved with a second connecting rod 63. A third connecting rod 64 is rotatably connected to the opposite sides of the two limit plates 61 at a side of the first connecting rod 62. The end of the third connecting rod 64 is rotatably sleeved with a fourth connecting rod 65. Auxiliary plates 66 are fixedly connected to the lower bottom ends of the two square steel brackets 15. The ends of the second connecting rod 63 and the fourth connecting rod 65 are rotatably sleeved with the two end points of the auxiliary plate 66. Fixing brackets 16 for reinforcement are fixedly connected to both sides of the auxiliary plate 66, and the ends of the fixing brackets 16 are fixedly connected to the outer side walls of the square steel brackets 15. A positioning shaft 37 is rotatably installed at the overlapping shaded part of the second connecting rod 63 and the third connecting rod 64, and the positioning shaft 37 is located inside the guide groove 36.

[0037] It should be noted that the limit plates 61 symmetrically and fixedly connected to the inner side walls of the frame 22 provide stable support points for the rotation of the first connecting rod 62, the second connecting rod 63, the third connecting rod 64, and the fourth connecting rod 65. This not only enables the leg rest mechanism 2 to maintain a smooth and orderly movement trajectory during adjustment, but also enhances the stability and durability of the entire leg rest structure. Through the rotational connection of the second connecting rod 63 and the fourth connecting rod 65 with the auxiliary plate 66 and the reinforcement of the fixing brackets 16, it is ensured that the leg rest mechanism 2 can maintain overall stability and balance during adjustment, avoiding shaking or tilting caused by improper adjustment, and further improving the riding comfort and safety. The positioning shaft 37 rotatably installed at the overlapping shaded part of the second connecting rod 63 and the third connecting rod 64 is cleverly located inside the guide groove 36, providing precise guidance and positioning for the movement of the link mechanism, ensuring that the link mechanism can maintain a smooth and deviation-free movement trajectory during adjustment.

[0038] Please refer to Figure 4 - Figure 8, the air supplement mechanism 4 includes first bearing brackets 41 symmetrically and fixedly connected to the inner side walls of the frame 22. A crankshaft 42 is rotatably sleeved inside the two first bearing brackets 41 through bearings. A first synchronous pulley 43 is fixedly connected to the outer wall of the crankshaft 42. Two crank rocker arms 44 are rotatably sleeved inside the crankshaft 42. A positioning plate 45 is fixedly connected to the inner side wall of the frame 22 at one side of the first bearing bracket 41. Cylinders 46 are symmetrically and fixedly connected inside the positioning plate 45. One-way intake valves 47 facilitating the entry of gas are provided on the outer walls of the two cylinders 46. Pistons 461 are slidably sleeved inside the cylinders 46. The other ends of the crank rocker arms 44 are rotatably sleeved inside the pistons 461. The exhaust ends of the two cylinders 46 are fixedly connected to a three-way pipe 48. One end of the three-way pipe 48 is fixedly connected to a first telescopic hose 482 connected to the intake end of the filling airbag 32, and the first telescopic hose 482 penetrates through the lower bottom end of the folding plate 31. A one-way exhaust valve 481 is provided on the outer wall of the three-way pipe 48 at one side of the first telescopic hose 482.

[0039] It should be noted that the crankshaft 42 fixedly connected to the inner side wall of the frame 22 through the first bearing bracket 41 and the first synchronous pulley 43 fixedly connected thereto achieve efficient power transmission of the air supplement mechanism 4. It not only ensures that the crankshaft 42 can rotate smoothly and continuously, but also improves the transmission efficiency and stability of the entire air supplement mechanism 4 through the synchronous cooperation of the first synchronous pulley 43 and other transmission components. The crank rocker arms 44 rotatably sleeved inside the crankshaft 42 and their rotational connection with the pistons 461 slidably sleeved inside the cylinders 46 constitute an efficient linkage mechanism. When the crankshaft 42 rotates, the crank rocker arms 44 drive the pistons 461 to reciprocate inside the cylinders 46, thereby realizing the compression and release of gas. It not only improves the working efficiency of the air supplement mechanism 4, but also ensures that the filling airbag 32 can be inflated quickly and stably. The one-way intake valves 47 provided on the outer walls of the cylinders 46 and the one-way exhaust valves 481 provided on the outer walls of the three-way pipes 48 provide precise gas control for the air supplement mechanism 4. The one-way intake valves 47 allow external gas to enter the cylinders 46 and prevent gas from flowing back; the one-way exhaust valves 481 ensure that gas can only flow from the cylinders 46 to the filling airbag 32, preventing gas leakage. It not only improves the gas utilization efficiency of the air supplement mechanism 4, but also ensures that the filling airbag 32 can continuously and stably maintain the inflated state. The three-way pipe 48 connects the exhaust ends of the two cylinders 46 and is connected to the intake end of the filling airbag 32 through the first telescopic hose 482. It not only simplifies the gas transmission path of the air supplement mechanism 4, but also ensures the stable connection between the filling airbag 32 and the air supplement mechanism 4 during the adjustment process through the flexibility of the first telescopic hose 482.

[0040] Please refer to Figure 4 - Figure 8, the exhaust mechanism 5 includes an air box 51 fixedly connected to the inner side wall of the frame 22. Two rotors 52 that move in an interlaced manner are rotatably sleeved inside the air box 51. The outer wall of the air box 51 is rotatably connected to a first gear 56 that moves coaxially with the two rotors 52, and the two first gears 56 are in meshing transmission. A first bevel gear 57 is fixedly connected to the end face of one of the first gears 56. Second bearing brackets 58 are fixedly connected to both sides of the outer side wall of the air box 51 where the first gear 56 is located. A rotating rod 581 is rotatably sleeved inside the two second bearing brackets 58 through bearings. A second bevel gear 59 that meshes with the first bevel gear 57 is fixedly sleeved on the outer wall of the rotating rod 581. A second synchronous wheel 591 is fixedly connected to the outer wall of the rotating rod 581 on one side of the second bevel gear 59. The air inlet end of the air box 51 is fixedly connected to a connecting pipe 53. The end of the connecting pipe 53 is fixedly connected to a second telescopic hose 55 connected to the exhaust end of the filling air bag 32, and the second telescopic hose 55 penetrates through the lower bottom end of the folding plate 31. An electric control valve 54 is fixedly connected to the outer wall of the connecting pipe 53.

[0041] It should be noted that the two rotors 52 that are rotatably sleeved inside the air box 51 and move in an interlaced manner achieve efficient gas discharge through their special design. At the same time, the meshing transmission of the first gears 56 that move coaxially with the two rotors 52 ensures that the rotors 52 can rotate smoothly and continuously, thereby improving the working efficiency of the exhaust mechanism 5. The meshing transmission between the first bevel gear 57 fixedly connected to the end face of one of the first gears 56 and the second bevel gear 59 fixedly sleeved on the outer wall of the rotating rod 581 provides stable power transmission for the exhaust mechanism 5. The bevel gear transmission method not only has a compact structure but also can withstand a large torque, ensuring the stability and reliability of the exhaust mechanism 5 during long-term operation. By opening and closing the electric control valve 54, the discharge speed and discharge amount of the gas in the filling air bag 32 can be precisely controlled, thereby meeting the different needs of passengers and improving the riding comfort. The second telescopic hose 55 fixedly connected to the end of the connecting pipe 53 and connected to the exhaust end of the filling air bag 32 ensures that the filling air bag 32 can maintain a stable connection with the exhaust mechanism 5 during the adjustment process.

[0042] Please refer to Figure 4 - Figure 6 , the driving mechanism 7 includes a second motor 71 fixedly connected to the inner side wall of the frame 22. One of the output ends of the second motor 71 is fixedly connected to a first driving shaft 72. The end of the first driving shaft 72 is fixedly connected to a second gear 74. A main shaft 76 is rotatably sleeved through a bearing on the inner side wall of the frame 22 on one side of the second motor 71. A third gear 75 that meshes with the second gear 74 is fixedly sleeved on the outer wall of the main shaft 76. Arc-shaped frames 77 are symmetrically fixedly sleeved on the outer wall of the main shaft 76, and the ends of the two arc-shaped frames 77 are fixedly connected to the lower bottom end of the folding plate 31.

[0043] It should be noted that the second motor 71 in the driving mechanism 7 serves as the power source. The first driving shaft 72 fixedly connected to its output end ensures efficient power transmission through precise design and manufacturing. This not only improves the working efficiency of the driving mechanism 7 but also ensures that the leg rest structure can maintain smooth and rapid movement during adjustment. The meshing transmission between the second gear 74 fixedly connected to the end of the first driving shaft 72 and the third gear 75 fixedly sleeved on the outer wall of the main shaft 76 provides stable power transmission for the driving mechanism 7. The arc-shaped frames 77 symmetrically and fixedly sleeved on the outer wall of the main shaft 76 are designed not only in line with mechanical principles but also fixedly connected to the lower bottom end of the folding plate 31 through their ends, realizing a firm support for the folding plate 31, enhancing the stability and load-bearing capacity of the folding plate 31 during adjustment, and ensuring that the filling airbag 32 can always be kept in the correct position to provide comfortable support for passengers.

[0044] Please refer to Figure 4 - Figure 12 As shown in, symmetrically and fixedly connected to the inner side wall of the frame 22 are positioning frames 78. fixedly connected to the inside of the positioning frames 78 are second electric push rods 781. fixedly connected to the end of the second electric push rod 781 is a pushing plate 782. Annularly arrayed on the outer side wall of the main shaft 76 are guide grooves 761. Slidingly sleeved on the outer wall of the main shaft 76 at the position of the guide grooves 761 is a first toothed disc 783. fixedly connected to the end face of the first toothed disc 783 is a winding ring 784. and the pushing plate 782 is rotatably sleeved on the outer wall of the winding ring 784. Rotatably sleeved on the outer wall of the main shaft 76 on the side opposite to the first toothed disc 783 is a second toothed disc 785. fixedly connected to the side of the second toothed disc 785 away from the first toothed disc 783 is a third synchronous pulley 786. and the third synchronous pulley 786 is rotatably sleeved on the main shaft 76.

[0045] It should be noted that the second electric push rod 781 arranged inside the symmetrically and fixedly connected positioning frames 78 on the inner side wall of the frame 22 realizes precise control of the position of the first toothed disc 783 through the pushing plate 782 at its end. This not only improves the adjustment precision of the leg rest structure but also ensures that the first toothed disc 783 can be closely matched with the guide grooves 761 on the main shaft 76, thus realizing stable transmission. The winding ring 784 fixedly connected to the end face of the first toothed disc 783 and the design of the pushing plate 782 rotatably sleeved on the outer wall of the winding ring 784 realize flexible driving of the first toothed disc 783 by the pushing plate 782. This not only simplifies the transmission structure but also improves the transmission efficiency, ensuring that the first toothed disc 783 can quickly and accurately respond to the driving instructions of the second electric push rod 781.

[0046] Please refer to Figure 4 - Figure 6, another output end of the second motor 71 is fixedly connected to a second drive shaft 73, and an end of the second drive shaft 73 is fixedly connected to a first synchronous pulley 43 which is the same as the outer wall of the crankshaft 42. A second synchronous belt 79 for transmission is sleeved on the outer walls of the two first synchronous pulleys 43, and a first synchronous belt 787 for transmission is sleeved on the outer walls of the third synchronous pulley 786 and the second synchronous pulley 591.

[0047] It should be noted that the second drive shaft 73 fixedly connected to the other output end of the second motor 71 realizes efficient linkage with the first synchronous pulley on the outer wall of the crankshaft 42 through the first synchronous pulley fixedly connected to its end. This not only simplifies the transmission structure, reduces energy loss, but also ensures smooth power transmission, improving the adjustment efficiency and accuracy of the leg rest structure. The second synchronous belt 79 sleeved on the outer walls of the two first synchronous pulleys 43, as a transmission medium, ensures synchronous and stable transmission between the second drive shaft 73 and the crankshaft 42. This not only enhances the reliability of the transmission, but also avoids noise and vibration caused by unstable transmission, further improving the riding comfort. The first synchronous belt 787 sleeved on the outer walls of the third synchronous pulley 786 and the second synchronous pulley 591 realizes flexible connection between the drive mechanism 7 and the exhaust mechanism 5.

[0048] An automotive seat, including a leg rest structure of the automotive seat.

[0049] When the user needs to use the leg rest mechanism 2: The user can add a corresponding driving part (such as an electric push rod can be connected to the first connecting rod 62 to achieve the purpose of automation, which is not shown in the figure) at the lower bottom end of the base body 11 to drive the operation of the support mechanism 6. When adjusting the pitching angle of the leg rest mechanism 2, the first motor 33 can be used to drive the two first driving rods 34 to rotate. The two ends of the first driving rod 34 are respectively fixedly connected to the guide frame 35. Therefore, the guide frame 35 will perform an arc-shaped movement and drive the positioning shaft 37 to adjust the angle through the guide groove 36. The positioning shaft 37 is located in the coincident plane of the third connecting rod 64 and the second connecting rod 63. Therefore, when the guide frame 35 performs an arc-shaped movement, it can timely adjust the pitching angle of the frame 22 through multiple groups of connecting rods arranged inside the support mechanism 6. However, when the leg rest mechanism 2 is in use, there will be a large gap between the elastic pad 21 and the base body 11. When the user uses it, due to the sagging of the leg muscles, part of the body is in the gap between the elastic pad 21 and the base body 11, which will cause discomfort to the user. Therefore, the second motor 71 can be started to drive the first driving shaft 72 to rotate, and through the meshing transmission of the second gear 74 and the third gear 75, the main shaft 76 is driven to rotate, thereby further driving the arc-shaped frame 77 and the folding plate 31 to perform an arc-shaped movement. As the arc-shaped frame 77 moves in an arc, the folding plate 31 will be flipped in front of the base body 11 and be parallel to the bottom end of the base body 11. At this time, control the other output end of the second motor 71 to drive the second driving shaft 73 to rotate, and with the mutual cooperation of the two first synchronous pulleys 43 and the second synchronous belt 79, the crankshaft 42 can be driven to rotate quickly. Since the crank rocker 44 is rotatably sleeved on the crankshaft 42, the crank rocker 44 will drive the piston 461 to reciprocate inside the cylinder 46, and the external air is introduced into the cylinder 46 through the one-way intake valve 47. Then, after being impacted by the piston 461, the gas is pushed into the inside of the three-way pipe 48 and the first telescopic hose 482, and finally enters the inside of the filling airbag 32 to make it expand and provide corresponding support for the user's legs;

[0050] When it is necessary to contract the inflatable airbag 32: the telescopic end of the second electric push rod 781 drives the pushing plate 782 to move horizontally. Since the pushing plate 782 is rotatably sleeved on the outer wall of the winding ring 784, when the pushing plate 782 moves horizontally, it will drive the winding ring 784 and the first tooth disc 783 to move left and right at the position of the guide groove 761 on the outer wall of the main shaft 76. The first tooth disc 783 will mesh and drive with the second tooth disc 785. After the main shaft 76 rotates driven by the third gear 75, it will drive the first tooth disc 783 and the second tooth disc 785 to rotate. The second tooth disc 785 drives the second synchronous wheel 591 and the second bevel gear 59 to rotate through the third synchronous wheel 786 and the first synchronous belt 787. The second bevel gear 59 meshes and drives with the first bevel gear 57, and can drive the first gear 56 below the first bevel gear 57 to rotate. Since the two first gears 56 mesh with each other, the two rotors 52 will achieve an interleaved movement driven by the first gears 56 rotating in two opposite directions. At this time, the electromagnetic valve 54 is opened, and the gas inside the inflatable airbag 32 can be exported through the second telescopic hose 55, and then enter the inside of the air frame 51 through the connecting pipe 53. The two rotors 52 accelerate the flow of the gas, and finally discharge it through the exhaust end of the air frame 51. The user can add a corresponding silencing pipe (not marked in the figure) at the exhaust end of the air frame 51, which can effectively reduce the sound generated during discharge. As the gas inside the inflatable airbag 32 decreases, the inflatable airbag 32 will fit on the end face of the folding plate 31 due to the air pressure, which can effectively reduce the difficulty of storage. At this time, the folding plate 31 will also gradually reset driven by the arc-shaped frame 77 and the main shaft 76, and then the leg rest mechanism 2 can be retracted to complete the overall storage of the device.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leg rest structure for a vehicle seat, comprising a seat mechanism (1) and a leg rest mechanism (2), characterized in that: The seat mechanism (1) includes a base body (11). A support mechanism (6) for supporting the leg rest mechanism (2) is provided at the lower bottom end of the base body (11). A filling mechanism (3) for filling the gap between the leg rest mechanism (2) and the base body (11) is provided inside the leg rest mechanism (2). An air supplement mechanism (4) for providing air source for the filling mechanism (3) is provided inside the leg rest mechanism (2). An exhaust mechanism (5) for quickly releasing the gas inside the filling mechanism (3) is provided at one side of the air supplement mechanism (4) inside the leg rest mechanism (2). A driving mechanism (7) for providing power source for the two is provided at one side of the air supplement mechanism (4) and the exhaust mechanism (5) inside the leg rest mechanism (2). The leg rest mechanism (2) includes a frame (22). The filling mechanism (3) includes a folding plate (31) located between the frame (22) and the base body (11). A filling airbag (32) for supporting the human body is fixedly connected to the upper end surface of the folding plate (31). The air supplement mechanism (4) includes first bearing brackets (41) symmetrically and fixedly connected to the inner side wall of the frame (22). A crankshaft (42) is rotatably sleeved inside the two first bearing brackets (41) through bearings. A first synchronous pulley (43) is fixedly connected to the outer wall of the crankshaft (42). Two crank rocker arms (44) are rotatably sleeved inside the crankshaft (42). A positioning plate (45) is fixedly connected to the inner side wall of the frame (22) at one side of the first bearing bracket (41). Cylinders (46) are symmetrically and fixedly connected inside the positioning plate (45). One-way intake valves (47) for facilitating the entry of gas are provided on the outer walls of the two cylinders (46). Pistons (461) are slidably sleeved inside the cylinders (46). The other ends of the crank rocker arms (44) are rotatably sleeved inside the pistons (461). The exhaust ends of the two cylinders (46) are fixedly connected to a three-way pipe (48). One end of the three-way pipe (48) is fixedly connected to a first telescopic hose (482) connected to the intake end of the filling airbag (32), and the first telescopic hose (482) penetrates through the lower bottom end of the folding plate (31). A one-way outlet valve (481) is provided on the outer wall of the three-way pipe (48) at one side of the first telescopic hose (482).

2. The leg rest structure of an automotive seat according to claim 1, characterized in that: The seat mechanism (1) further includes first side seats (12) symmetrically and fixedly connected to the outer side wall of the base body (11). A backrest (13) is provided on one side of the base body (11) away from the filling mechanism (3). Second side seats (14) are symmetrically and fixedly connected to the outer side wall of the backrest (13). Square steel brackets (15) are symmetrically and fixedly connected to the lower end surface of the base body (11).

3. The leg rest structure of an automotive seat according to claim 1, characterized in that: An elastic pad (21) for supporting the human leg is fixedly connected to the end face of the frame (22). A first motor (33) is fixedly connected to the lower end face of the base body (11) at the center of the two square steel brackets (15). Two output ends of the first motor (33) are fixedly connected to a first driving rod (34). End parts of the two first driving rods (34) are fixedly connected to a guide frame (35). Guide grooves (36) are formed in the outer side walls of the two guide frames (35).

4. The leg support structure of an automotive seat according to claim 3, wherein: The support mechanism (6) includes limit plates (61) symmetrically and fixedly connected to the inner side walls of the frame (22). A first connecting rod (62) is rotatably connected to opposite sides of the two limit plates (61). End parts of the two first connecting rods (62) are rotatably sleeved with a second connecting rod (63). A third connecting rod (64) is rotatably connected to the opposite sides of the two limit plates (61) on one side of the first connecting rod (62). An end part of the third connecting rod (64) is rotatably sleeved with a fourth connecting rod (65). Auxiliary plates (66) are fixedly connected to the lower bottom ends of the two square steel brackets (15). End parts of the second connecting rod (63) and the fourth connecting rod (65) are rotatably sleeved with two end points of the auxiliary plate (66). Fixing brackets (16) for reinforcement are fixedly connected to both sides of the auxiliary plate (66). Ends of the fixing brackets (16) are fixedly connected to the outer side walls of the square steel brackets (15). A positioning shaft (37) is rotatably installed at the overlapping shadow part of the second connecting rod (63) and the third connecting rod (64), and the positioning shaft (37) is located inside the guide groove (36).

5. The leg rest structure of an automotive seat according to claim 3, characterized in that: The exhaust mechanism (5) includes an air frame (51) fixedly connected to the inner side wall of the frame (22). Two rotors (52) that move alternately with each other are rotatably sleeved inside the air frame (51). A first gear (56) that moves coaxially with the two rotors (52) is rotatably connected to the outer wall of the air frame (51), and the two first gears (56) are in meshing transmission. A first bevel gear (57) is fixedly connected to the end face of one of the first gears (56). Second bearing brackets (58) are fixedly connected to both sides of the outer side wall of the air frame (51) where the first gears (56) are located. A rotating rod (581) is rotatably sleeved inside the two second bearing brackets (58) through bearings. A second bevel gear (59) that is in meshing transmission with the first bevel gear (57) is fixedly sleeved on the outer wall of the rotating rod (581). A second synchronous wheel (591) is fixedly connected to the outer wall of the rotating rod (581) on one side of the second bevel gear (59). A connecting pipe (53) is fixedly connected to the air inlet end of the air frame (51). A second telescopic hose (55) connected to the exhaust end of the filling airbag (32) is fixedly connected to the end of the connecting pipe (53), and the second telescopic hose (55) penetrates through the lower bottom end of the folding plate (31). An electric control valve (54) is fixedly connected to the outer wall of the connecting pipe (53).

6. The leg rest structure of an automotive seat according to claim 3, characterized in that: The driving mechanism (7) includes a second motor (71) fixedly connected to the inner side wall of the frame (22). One output end of the second motor (71) is fixedly connected to a first driving shaft (72). The end of the first driving shaft (72) is fixedly connected to a second gear (74). The inner side wall of the frame (22) is rotatably sleeved with a main shaft (76) through a bearing on one side of the second motor (71). The outer wall of the main shaft (76) is fixedly sleeved with a third gear (75) meshing and driving with the second gear (74). The outer wall of the main shaft (76) is symmetrically fixedly sleeved with arc-shaped frames (77), and the ends of the two arc-shaped frames (77) are fixedly connected to the lower bottom end of the folding plate (31).

7. The leg rest structure of an automotive seat according to claim 6, characterized in that: The inner side wall of the frame (22) is symmetrically fixedly connected with positioning frames (78). A second electric push rod (781) is fixedly connected inside the positioning frame (78). The end of the second electric push rod (781) is fixedly connected to a pushing plate (782). Guide grooves (761) are annularly arrayed on the outer side wall of the main shaft (76). A first toothed disc (783) is slidably sleeved on the outer wall of the main shaft (76) at the position of the guide grooves (761). The end face of the first toothed disc (783) is fixedly connected to a winding ring (784), and the pushing plate (782) is rotatably sleeved on the outer wall of the winding ring (784). The outer wall of the main shaft (76) is rotatably sleeved with a second toothed disc (785) on the side opposite to the first toothed disc (783). A third synchronous wheel (786) is fixedly connected to the side of the second toothed disc (785) away from the first toothed disc (783), and the third synchronous wheel (786) is rotatably sleeved with the main shaft (76).

8. The leg rest structure of an automotive seat according to claim 7, characterized in that: The other output end of the second motor (71) is fixedly connected to a second driving shaft (73), and the end of the second driving shaft (73) is fixedly connected to a first synchronous wheel (43) having the same outer wall as the outer wall of the crankshaft (42). A second synchronous belt (79) for transmission is sleeved on the outer walls of the two first synchronous wheels (43). A first synchronous belt (787) for transmission is sleeved on the outer walls of the third synchronous wheel (786) and the second synchronous wheel (591).

9. An automotive seat, characterized in that: It includes the leg rest structure of the vehicle seat according to any one of claims 1-8.

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