Leg supporting mechanism of automobile seat

Abstract

The utility model discloses an automobile seat leg supporting mechanism which is applied to an automobile seat, the automobile seat comprises a seat basin metal plate and leg foam, and the device comprises a first power device arranged at the front end of the seat basin metal plate; a supporting plate body is slidably arranged at the top of the seat basin metal plate and extends to the front end of the first power device, and the first power device can drive the supporting plate body to move and jack up the leg foam; the second power device is arranged at the bottom of the seat basin metal plate and connected with the supporting plate body through a first sliding assembly, and the second power device can push the supporting plate body to move, so that the leg foam is retracted; the rolling body is arranged at the position, making contact with the leg foam, of the supporting plate body and used for reducing friction force between the supporting plate body and the leg foam, so that the leg foam moves more stably, and the second power device can recycle the leg foam when the leg foam does not need to be used.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of automobile seats, in particular to an automobile seat leg support mechanism. BACKGROUND

[0002] In recent years, the development of automobiles is increasingly rapid, and people's choices are more and more diversified, and the requirements for automobile accessories are also higher and higher, including automobile seat leg supports. The leg support is a kind of accessory on the automobile seat, which is mainly used to assist in increasing the leg support area of the passenger to improve the comfort of riding.

[0003] In order to improve the comfort of passengers in the car, the existing automobile seat usually has a leg support connected to the bottom plate of the seat by sliding, and whether to use the leg support is selected according to the needs of the passengers.

[0004] The support plate of the leg support is generally in contact with the foam, and when the leg support is extended forward, the friction between the support plate and the foam is the largest resistance source except for the weight. The power required for the leg support to move forward will be larger, and in addition, the existing pneumatic leg support has no mechanical structure for recovery, and the recovery is unstable. SUMMARY

[0005] In view of the above defects or deficiencies in the prior art, it is desirable to provide an automobile seat leg support mechanism.

[0006] In a first aspect, the present application provides an automobile seat leg support mechanism applied to an automobile seat, the automobile seat comprising a seat pan metal, the seat pan metal being covered with a seat cushion foam, and the seat cushion foam having a leg foam located at the front end of the seat pan metal, the leg support mechanism comprising:

[0007] a first power device fixedly arranged at the front end of the seat pan metal;

[0008] a support plate body slidingly arranged at the top of the seat pan metal and extending to the front end of the first power device, the support plate body being capable of sliding on the seat pan metal by starting the first power device, thereby lifting the leg foam;

[0009] a second power device arranged at the bottom of the seat pan metal and connected with the support plate body through a first sliding assembly, the second power device being capable of pushing the support plate body to slide on the seat pan metal by being started, thereby retracting the leg foam;

[0010] a rolling body arranged at a position where the support plate body contacts the leg foam, for reducing the friction between the support plate body and the leg foam.

[0011] According to the technical scheme provided in the embodiment of the present application, the support plate body comprises a leg support plate, the leg support plate is in L-shaped structure, and the leg support plate has a first connecting section and a second connecting section; the first connecting section is slidably arranged on the top of the seat basin metal through a second sliding assembly; and the second connecting section is located at the front end of the seat basin metal.

[0012] According to the technical scheme provided in the embodiment of the present application, the support plate body further comprises a foam support plate, the foam support plate is in L-shaped structure, and the foam support plate is arranged on the top of the leg support plate and used for supporting the leg foam; and a reinforcing structure is arranged on the top of the foam support plate.

[0013] According to the technical scheme provided in the embodiment of the present application, the second sliding assembly comprises a second sliding rail, which is arranged on the top of the seat basin metal; and the second sliding assembly further comprises a second sliding block, which is fixedly arranged on the bottom of the first connecting section and slidably arranged in the second sliding rail.

[0014] According to the technical scheme provided in the embodiment of the present application, the first power device comprises a jacking air bag support plate, which is fixedly arranged at the front end of the seat basin metal; and a jacking air bag is arranged on the side wall of the seat basin metal away from the jacking air bag support plate; the jacking air bag is inflated to expand the jacking air bag, so that the second connecting section is moved and the leg foam is jacked up.

[0015] According to the technical scheme provided in the embodiment of the present application, the first sliding assembly comprises a fixed plate, which is fixedly arranged on the bottom of the seat basin metal; a first sliding rail is arranged on the fixed plate; the first sliding assembly further comprises a first sliding block, which is slidably connected with the first sliding rail and fixedly connected with the second connecting section of the support plate body at one end.

[0016] According to the technical scheme provided in the embodiment of the present application, the second power device comprises a recovery air bag support plate, which is fixedly connected with the first sliding block; and a recovery air bag is arranged on the side wall of the seat basin metal close to the front end of the recovery air bag support plate.

[0017] According to the technical scheme provided in the embodiment of the present application, a rolling body is rotatably arranged at the joint of the first connecting section and the second connecting section, so as to reduce the friction when the support plate body contacts the leg foam.

[0018] According to the technical scheme provided in the embodiment of the present application, a locking assembly is further arranged to ensure the stability of the support plate body; the locking assembly comprises a locking piece arranged on the top of the seat basin metal, and the top of the locking piece has a locking tongue; and a plurality of locking grooves matched with the locking tongue are uniformly arranged on the bottom of the support plate body along the length direction.

[0019] According to the technical scheme provided by the embodiment of the application, the locking member comprises a pneumatic locking cylinder, a piston rod is movably arranged in the interior of the pneumatic locking cylinder, one end of the piston rod is movably penetrated to the outside of the pneumatic locking cylinder and is connected with the locking tongue, the pneumatic locking cylinder has a gas charging space in the interior, and a gas inlet and outlet hole is arranged on the pneumatic locking cylinder and is in communication with the gas charging space, for connecting with an external gas source, the locking tongue is away from the locking groove by charging gas into the gas charging space; the pneumatic locking cylinder is further provided with a thrust assembly for providing a thrust to the piston rod to make the locking tongue clamped in the locking groove.

[0020] In summary, the technical scheme specifically discloses a leg supporting mechanism of an automobile seat, which is applied to an automobile seat. The automobile seat comprises a seat pan metal plate, and a seat cushion foam is wrapped on the seat pan metal plate. The seat cushion foam has a leg foam. The leg supporting mechanism of the automobile seat comprises a first power device, which is arranged at the front end of the seat pan metal plate; a supporting plate body, which is slidably arranged at the top of the seat pan metal plate and extends to the front end of the first power device, and the first power device can drive the supporting plate body to move, so that the leg foam is lifted; and a second power device, which is arranged at the bottom of the seat pan metal plate and is connected with the supporting plate body through a first sliding assembly. The second power device can drive the supporting plate body to slide on the seat pan metal plate, so that the leg foam is retracted. A rolling body is arranged at the position where the supporting plate body contacts the leg foam, so as to reduce the friction between the supporting plate body and the leg foam.

[0021] Therefore, the rolling body is arranged to replace the conventional supporting plate body directly contacting the leg foam, the friction between the supporting plate body and the leg foam is reduced, the leg foam moves more stably, and the second power device is arranged. When the leg foam is not used, the leg foam can be retracted, and the retraction stability is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other characteristics, objects and advantages of the application will become more apparent from the following detailed description of non-restrictive embodiments, made with reference to the attached drawings:

[0023] Figure 1 FIG. 1 is a schematic view of a leg supporting mechanism of an automobile seat.

[0024] Figure 2 FIG. 2 is a bottom view of the leg supporting mechanism of the automobile seat.

[0025] Figure 3 FIG. 3 is a side sectional view of the leg supporting mechanism of the automobile seat.

[0026] Figure 4 FIG. 4 is a schematic view of a lifting gas bag.

[0027] Figure 5 Figure 6 is a side view of the leg support plate.

[0028] Figure 6 Figure 7 is a schematic view of the short roller.

[0029] Figure 7 Figure 8 is a schematic view of the long roller.

[0030] Figure 8 Figure 9 is a schematic view of the roller.

[0031] Figure 9 Figure 10 is a schematic view of the locking assembly.

[0032] Figure 10 Figure 11 is a schematic view of the Figure 9 Figure 12 is an enlarged view of A in Figure 11.

[0033] Figure 11 Figure 13 is a sectional view of the thrust assembly including a magnetic block.

[0034] Figure 12 Figure 14 is an exploded view of the thrust assembly including a magnetic block.

[0035] Figure 13 Figure 15 is a sectional view of the thrust assembly including an elastic member.

[0036] Figure 14 Figure 16 is an exploded view of the thrust assembly including an elastic member.

[0037] Figure 15 Figure 17 is a schematic view of the second sliding rail.

[0038] Figure 16 Figure 18 is a schematic view of the support plate body ejection.

[0039] Figure 19 is a schematic view of the support plate body ejection. Figure 1 is a schematic view of the seat cushion panel; Figure 2 is a schematic view of the leg foam; Figure 3 is a schematic view of the support plate body; Figure 4 is a schematic view of the first connecting section; Figure 5 is a schematic view of the second connecting section; Figure 6 is a schematic view of the second sliding rail; Figure 7 is a schematic view of the foam support plate; Figure 8 is a schematic view of the lifting air bag support plate; Figure 9 is a schematic view of the lifting air bag; Figure 10 is a schematic view of the fixed plate; Figure 11 is a schematic view of the first sliding block; Figure 12 is a schematic view of the recovery air bag support plate; Figure 13 is a schematic view of the recovery air bag; Figure 14 is a schematic view of the short roller; Figure 15 is a schematic view of the long roller; Figure 16 is a schematic view of the roller; Figure 17 is a schematic view of the locking member; Figure 18 is a schematic view of the locking tongue; Figure 19 is a schematic view of the locking groove; Figure 20 is a schematic view of the pneumatic locking cylinder; Figure 21 is a schematic view of the piston rod; Figure 22 is a schematic view of the air inlet and outlet hole; Figure 23 is a schematic view of the third connecting section; Figure 24 is a schematic view of the fourth connecting section; Figure 25 is a schematic view of the reinforcing member; Figure 26 is a schematic view of the movable block; Figure 27 is a schematic view of the sealing ring; Figure 28 is a schematic view of the wear-resistant ring; Figure 29 is a schematic view of the magnetic block; Figure 30 is a schematic view of the magnetic ring; Figure 31 is a schematic view of the elastic member; Figure 32 is a schematic view of the leg support plate; and Figure 33 is a schematic view of the connecting block. DETAILED DESCRIPTION

[0040] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are intended to be illustrative only and are not limiting to the application. Furthermore, for the purpose of clarity, only those portions of the drawings that are relevant to a thorough understanding of the present application are shown.

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] Embodiment one

[0043] A leg support mechanism of an automobile seat is applied to an automobile seat. The automobile seat comprises a seat pan metal sheet 1, one end of the seat pan metal sheet 1 being a front end. A seat foam is wrapped on the seat pan metal sheet 1. The seat foam has a leg foam 2, and the leg foam 2 is located at the front end of the seat pan metal sheet 1.

[0044] As shown in Figures 1 to 4 , a leg support mechanism of an automobile seat comprises:

[0045] A support plate body 3 is slidably arranged on the top of the seat pan metal sheet 1 through a second sliding assembly, so that the support plate body 3 can extend and retract along a first direction, and drive the leg foam 2 to extend and retract.

[0046] Specifically, the support plate body 3 comprises a leg support plate 32, which is an L-shaped structure and has a first connecting section 4 and a second connecting section 5. The first connecting section 4 extends along the first direction in the length direction and is slidably arranged on the top of the seat pan metal sheet 1 through the second sliding assembly. The second connecting section 5 extends along a second direction in the length direction and is located at the front end of the seat pan metal sheet 1. The first direction is a horizontal direction, the second direction is a vertical direction, and the first direction is perpendicular to the second direction. Figure 5 Figure 5

[0047] Further, the support plate body 3 further comprises a foam support plate 7, which is an L-shaped structure and is installed on the top of the leg support plate 32 through a screw. The foam support plate 7 is used to support the leg foam 2. The projection of the foam support plate 7 in the second direction is greater than the projection of the leg support plate 32 in the second direction, so that the foam support plate 7 is covered on the leg support plate 32. The foam support plate 7 has a third connecting section 23 and a fourth connecting section 24. The third connecting section 23 corresponds to the first connecting section 4, and the fourth connecting section 24 corresponds to the second connecting section 5.

[0048] Further, a reinforcing structure is arranged on the side of the foam support plate 7 close to the leg foam 2. The reinforcing structure comprises a plurality of reinforcing members 25 arranged on the top of the foam support plate 7 along a third direction, which is used to strengthen the strength of the foam support plate 7, so as to provide better support for the leg foam 2. The third direction is a horizontal direction, and the third direction is perpendicular to the first direction and perpendicular to the second direction. Figure 2

[0049] Further, as shown in Figure 15 ​​​As shown, the second sliding assembly comprises a second sliding rail 6 which is opened at the top of the seat basin panel 1 and extends in the first direction, and the second sliding assembly further comprises a second sliding block which is fixedly arranged at the bottom of the first connecting section 4 and is slidingly arranged in the second sliding rail 6; thus the first connecting section 4 can move in the first direction to drive the second connecting section 5 to move in the first direction, so as to support the plate body 3 to contact and lift the leg foam 2.

[0050] The first power device is fixedly arranged at the front end of the seat basin panel 1 and is used to drive the plate body 3 to move in the first direction;

[0051] Specifically, the first power device comprises a lifting air bag support plate 8 which is fixedly arranged at the front end of the seat basin panel 1 and is parallel to the second direction, and the second connecting section 5 is located on the side of the lifting air bag support plate 8 away from the seat basin panel 1.

[0052] Further, the first power device further comprises a lifting air bag 9 which is arranged on the side wall of the lifting air bag support plate 8 away from the seat basin panel 1, and by inflating the inside of the lifting air bag 9, the lifting air bag 9 expands in the first direction, so that the lifting air bag 9 contacts and lifts the second connecting section 5, so that the plate body 3 moves in the first direction, and then the leg foam 2 is lifted.

[0053] The second power device is arranged at the bottom of the seat basin panel 1 and is connected with the plate body 3 through the first sliding assembly, and starting the second power device can push the plate body 3 to slide on the seat basin panel 1, so as to retract the leg foam 2;

[0054] Specifically, the first sliding assembly comprises a fixed plate 10 which is fixedly arranged at the bottom of the seat basin panel 1, and the fixed plate 10 is provided with a first sliding rail which extends in the first direction, and optionally, the first sliding rail is provided with two;

[0055] Further, the first sliding assembly further comprises a first sliding block 11 which is slidingly connected with the first sliding rail, and optionally, the first sliding block 11 is provided with two, and one end of the first sliding block 11 close to the front end of the seat basin panel 1 is fixedly connected with the second connecting section 5 of the plate body 3 through a connecting block 33;

[0056] Further, the second power device comprises a recovery air bag support plate 12 which is fixedly connected with the first sliding block 11, and optionally, the recovery air bag support plate 12 is commonly connected between the two first sliding blocks 11, and the recovery air bag support plate 12 is parallel to the lifting air bag support plate 8;

[0057] Further, the second power device further comprises a recovery air bag 13 arranged on the side wall of the recovery air bag support plate 12 close to the front end of the basin panel 1. After the leg foam 2 is extended by the second power device, when it is necessary to recover the leg foam 2, the jacking air bag 9 is deflated, and then the recovery air bag 13 is inflated. The recovery air bag 13 expands, and one end close to the front end of the basin panel 1 abuts against the jacking air bag support plate 8. Through the continuous expansion of the recovery air bag 13, the recovery air bag support plate 12 is pushed to move along the first slide rail, so that the recovery air bag support plate 12 gradually moves away from the front end of the basin panel 1, thereby realizing the recovery of the leg foam 2. The two first slide rails can ensure the stable movement of the recovery air bag support plate 12, so that the leg foam 2 is stably recovered.

[0058] In order to make the support plate body 3 contact and jack up the leg foam 2 to reduce the friction between the support plate body 3 and the leg foam 2, and ensure that the leg foam 2 moves more stably, a rolling body is arranged on the support plate body 3;

[0059] Specifically, the rolling body is arranged at the joint of the third connecting section 23 and the fourth connecting section 24, that is, the joint of the third connecting section 23 and the fourth connecting section 24 is the part that first contacts the leg foam 2 when the support plate body 3 moves. The rolling friction is used to replace the traditional sliding friction, so as to reduce the friction between the support plate body 3 and the leg foam 2;

[0060] Further, as shown in Figure 6 , the rolling body can be four short rollers 14, which are arranged in two groups and are arranged in a staggered manner on the surface of the foam support plate 7. The two short rollers 14 in each group are arranged in the third direction, and the short rollers 14 extend in the third direction;

[0061] Alternatively, as shown in Figure 7 , the rolling body is two long rollers 15. The long rollers 15 extend in the third direction, and the two long rollers 15 are arranged in a staggered manner on the surface of the foam support plate 7;

[0062] Alternatively, as shown in Figure 8 , the rolling body can be a plurality of rollers 16, which are arranged in two groups in an equal number and are arranged in a staggered manner on the surface of the foam support plate 7. The plurality of rollers 16 in each group are arranged in the third direction.

[0063] As shown in Figures 9 to 14 , when the first power device pushes the support plate body 3 to jack up the leg foam 2, if the weight pressure of the leg foam 2 is greater than the air pressure strength in the jacking air bag 9, the jacking air bag 9 may retract. By increasing the locking assembly, the stability of the leg foam 2 under load is ensured;

[0064] Specifically, the locking assembly includes a locking piece 17 arranged on the top of the seat panel 1, and the top of the locking piece 17 is provided with a locking tongue 18 capable of extending and retracting. The bottom of the first connecting section 4 or the edge of the bottom of the third connecting section 23 is uniformly provided with a plurality of locking grooves 19 along the length direction. By activating the locking piece 17, the locking tongue 18 extends and is clamped in the locking groove 19 to limit the support plate body 3.

[0065] Further, the locking piece 17 includes a pneumatic locking cylinder 20, and a piston rod 21 is movably arranged in the pneumatic locking cylinder 20. The top of the piston rod 21 extends to the outside of the pneumatic locking cylinder 20 and is connected with the locking tongue 18. The part of the piston rod 21 located in the pneumatic locking cylinder 20 is fixedly sleeved with a movable block 26. A sealing ring 27 and a wear-resistant ring 28 are sequentially sleeved on the movable block 26 along the second direction. The sealing ring 27 is relatively close to the locking tongue 18. An inflation space is formed between the top inner wall of the pneumatic locking cylinder 20 and the movable block 26. An air inlet and outlet hole 22 is arranged on the pneumatic locking cylinder 20 and communicates with the inflation space and is connected with an external air source to realize inflation and deflation of the inflation space. By inflating the inflation space, the gas pushes the movable block 26 to move, thereby driving the piston rod 21 to move and making the locking tongue 18 disengage from the locking groove 19 to release the limitation of the support plate body 3.

[0066] Further, the pneumatic locking cylinder 20 is also provided with a thrust assembly for providing a thrust to the piston rod 21 to make the locking tongue 18 clamped in the locking groove 19.

[0067] Optionally, the thrust assembly includes a magnetic block 29 arranged on the inner wall of the bottom of the pneumatic locking cylinder 20. A magnetic ring 30 is sleeved on the bottom of the piston rod 21, and the magnetic ring 30 and the magnetic block 29 have the same magnetic pole to generate repulsion.

[0068] Optionally, the thrust assembly includes an elastic member 31 extending along the second direction, and the two ends of the elastic member 31 are connected with the bottom of the piston rod 21 and the inner wall of the bottom of the pneumatic locking cylinder 20, respectively. The elastic member 31 can be a self-resetting spring.

[0069] Further, the locking piece 17 can also be an electromagnetic switch. The locking piece 17 is fixed on the top of the front end of the seat panel 1, and at least one is installed. The locking grooves 19 corresponding to the locking tongues 18 of the locking pieces 17 need to be reserved on the corresponding positions on both sides of the support plate body 3. The height of the locking tongue 18 needs to be confirmed according to the installation position and the depth of the locking groove 19 of the support plate body 3.

[0070] Further, when the leg foam 2 needs to be extended and retracted, the locking tongue 18 is controlled to be retracted. When the leg foam 2 moves to the required position, the locking tongue 18 is controlled to extend, and the locking tongue 18 can cooperate with the locking groove 19 to fix the support plate body 3, thereby limiting the leg foam 2.

[0071] Working principle: when the leg foam 2 needs to be extended, the inside of the lifting air bag 9 is inflated to make the lifting air bag 9 swell (as shown in Figure 16 ), the lifting air bag 9 contacts and lifts the second connecting section 5, so that the support plate body 3 moves in the first direction, and then the leg foam 2 is lifted, and in this process, the support plate body 3 drives the recovery air bag support plate 12 to approach the lifting air bag support plate 8; when the leg foam 2 needs to be recovered, the lifting air bag 9 is deflated, and the recovery air bag 13 is inflated, the recovery air bag 13 swells, and one end close to the front end of the seat pan metal plate 1 abuts against the lifting air bag support plate 8, the recovery air bag support plate 12 gradually moves away from the front end of the seat pan metal plate 1 by the continuous swelling of the recovery air bag 13, so as to realize the recovery of the leg foam 2;

[0072] When the support plate body 3 moves, the rolling body is arranged to contact the leg foam 2, which reduces the friction between the support plate body 3 and the leg foam 2, and ensures that the leg foam 2 can move stably;

[0073] When the leg foam 2 moves, the outside air source inflates the inflation space, the gas pushes the movable block 26, so that the piston rod 21 drives the lock tongue 18 to move away from the locking groove 19, and the leg foam 2 is released from the limiting, at this time, the magnetic ring 30 and the magnetic block 29 are close to each other to generate repulsion, or the elastic member 31 is compressed to generate elastic force;

[0074] When the leg foam 2 moves to the required position, the outside air source extracts the gas in the inflation space, under the action of repulsion or elastic force, the piston rod 21 is pushed to move, so that the lock tongue 18 extends, and the lock tongue 18 can cooperate with the locking groove 19, so as to fix the support plate body 3, and then limit the leg foam 2.

[0075] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A leg support mechanism for a car seat, applied to a car seat, the car seat including a seat basin sheet metal (1), the seat basin sheet metal (1) being covered with seat cushion foam, and the seat cushion foam having leg foam (2) located at the front end of the seat basin sheet metal (1), characterized in that, The leg support mechanism includes: The first power unit is fixedly installed at the front end of the seat plate (1); The support plate body (3) is slidably disposed on the top of the seat plate (1) and extends to the front end of the first power device. By activating the first power device, the support plate body (3) can be pushed to slide on the seat plate (1), thereby lifting the leg foam (2). The second power device is located at the bottom of the seat plate (1) and is connected to the support plate body (3) through the first sliding component. Activating the second power device can push the support plate body (3) to slide on the seat plate (1), thereby retracting the leg foam (2). A rolling element is disposed at the position where the support plate body (3) contacts the leg foam (2) to reduce the friction between the support plate body (3) and the leg foam (2).

2. The car seat leg support mechanism according to claim 1, characterized in that, The support plate body (3) includes a leg support plate (32), which is an L-shaped structure and has a first connecting section (4) and a second connecting section (5). The first connecting section (4) is slidably disposed on the top of the seat plate (1) through a second sliding component, and the second connecting section (5) is located at the front end of the seat plate (1).

3. The car seat leg support mechanism according to claim 2, characterized in that, The support plate body (3) also includes a foam support plate (7), which is an L-shaped structure. The foam support plate (7) is located on the top of the leg support plate (32) and is used to support the leg foam (2). The top of the foam support plate (7) is provided with a reinforcing structure.

4. The car seat leg support mechanism according to claim 2, characterized in that, The second sliding component includes a second slide rail (6) which is opened on the top of the seat plate (1). The second sliding component also includes a second slider which is fixedly disposed at the bottom of the first connecting section (4), and the second slider is slidably disposed in the second slide rail (6).

5. A car seat leg support mechanism according to claim 3, characterized in that, The first power device includes a lifting airbag support plate (8), which is fixedly installed at the front end of the seat plate (1), and a lifting airbag (9) is provided on the side wall of the lifting airbag support plate (8) away from the seat plate (1). By inflating the lifting airbag (9) with air, the lifting airbag (9) expands, thereby pushing the second connecting section (5) to move, and thus lifting the leg foam (2).

6. A car seat leg support mechanism according to claim 2, characterized in that, The first sliding component includes a fixed plate (10), which is fixedly disposed at the bottom of the seat plate (1). A first slide rail is provided on the fixed plate (10). The first sliding component also includes a first slider (11), which is slidably connected to the first slide rail, and one end of which is fixedly connected to the second connecting section (5) of the support plate body (3).

7. A car seat leg support mechanism according to claim 6, characterized in that, The second power unit includes a recovery air bag support plate (12), which is fixedly connected to the first slider (11), and a recovery air bag (13) is provided on the side wall of the recovery air bag support plate (12) near the front end of the seat plate sheet metal (1).

8. A car seat leg support mechanism according to claim 2, characterized in that, The first connecting segment (4) and the second connecting segment (5) are rotatably provided with the rolling element, which is used to reduce friction when the support plate body (3) contacts the leg foam (2).

9. A car seat leg support mechanism according to claim 2, characterized in that, It also includes a locking assembly to ensure the stability of the support plate body (3). The locking assembly includes a locking member (17) which is disposed on the top of the seat plate sheet metal (1), and the top of the locking member (17) has a locking tongue (18). The bottom of the support plate body (3) is evenly provided with a plurality of locking grooves (19) that match the locking tongue (18) along its length direction.

10. A car seat leg support mechanism according to claim 9, characterized in that, The locking component (17) includes a pneumatic locking cylinder (20), inside which a piston rod (21) is movably disposed. One end of the piston rod (21) extends through to the outside of the pneumatic locking cylinder (20) and is connected to the locking tongue (18). The pneumatic locking cylinder (20) has an inflation space, and the pneumatic locking cylinder (20) has an air inlet / outlet hole (22) communicating with the inflation space for connecting to an external air source. By inflating the inflation space, the locking tongue (18) is moved away from the locking groove (19). The pneumatic locking cylinder (20) is also provided with a thrust assembly for providing thrust to the piston rod (21) to make the locking tongue (18) engage in the locking groove (19).

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