Leg rest structure of an automobile seat

Abstract

The utility model belongs to the technical field of automobile seat, it solves the problem that the inside space of part vehicle model is small and influences normal unfolding of leg support in prior art. Provide a kind of leg support structure of automobile seat, including first push rod and two first connecting rods being fixedly connected on seat basin, connecting shaft being hinged with first push rod is arranged between seat basin and leg support assembly, two ends of connecting shaft are fixedly connected with second connecting rod being bent respectively, one end of two second connecting rods is hinged with the first connecting rod of same side respectively, the other end of two second connecting rods is hinged with leg support assembly respectively, the middle part of two second connecting rods is hinged with third connecting rod respectively, the middle part of two first connecting rods is hinged with fourth connecting rod respectively, two fifth connecting rods are hinged on leg support assembly, and third connecting rod, fourth connecting rod and fifth connecting rod located in same side are all hinged in same point. The utility model has the advantages of being capable of reducing the space required for the extension of the leg support of the automobile seat.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology and relates to a leg support structure for an automotive seat. Background Technology

[0002] Car seat leg rests are typically folded and installed at the front of the car seat. They can be unfolded manually or electrically to help increase the leg support area for passengers, filling the entire leg bend and ensuring passenger comfort.

[0003] For example, Chinese patent literature discloses an adjustable leg rest for a car seat (application number: 202323291760.6), which includes two sets of fixed supports fixedly installed at the bottom of the seat frame. Each of the two sets of fixed supports is hinged to a limit plate at the bottom front side. A connecting plate is hinged to the other end of the limit plate. A rotating arm is hinged to the upper front side of the two sets of fixed supports. An arc-shaped plate is hinged to the other end of the second deflection plate. A leg rest frame is hinged to the other end of the first deflection plate and the arc-shaped plate. A leg rest panel is slidably connected to the surface of the leg rest frame.

[0004] The adjustable leg rest for car seats has the following shortcomings during use: The fixed support, limiting plate, connecting plate, and rotating arm of the adjustable leg rest are hinged to form a four-bar structure. Simultaneously, the connecting plate, rotating arm, deflection plate one and two, as well as the deflection plate one, deflection plate two, arc plate, and leg rest frame, are also hinged to form four-bar structures. Adjacent four-bar structures in these three sets of four-bar structures form scissor-fork structures, causing the adjustable leg rest to primarily extend forward and backward when unfolded. Therefore, a large amount of forward and backward space is required for its installation and use. However, the space between the dashboard and seats in some new energy compact cars and small cars is limited, causing the adjustable leg rest to easily collide with or interfere with the interior walls during use, affecting its normal unfolding and use. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a leg support structure for automobile seats. The technical problem this invention aims to solve is how to reduce the space required for the extension of the automobile seat leg support.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A leg support structure for a car seat, the car seat including a seat basin, the leg support structure including a leg support assembly disposed in front of the seat basin, the leg support assembly including a first leg support and a second leg support slidably connected to the first leg support, characterized in that the leg support structure further includes a first push rod disposed along the front-rear direction of the car seat, two first connecting rods fixedly connected to the seat basin, a connecting shaft hinged to the first push rod disposed between the seat basin and the leg support assembly along the left-right direction of the car seat, the two ends of the connecting shaft respectively being fixedly connected to bent second connecting rods, one end of the two second connecting rods respectively being hinged to the first connecting rods on the same side, the other end of the two second connecting rods respectively being hinged to the leg support assembly, the middle part of the two second connecting rods respectively being hinged to a third connecting rod, the middle part of the two first connecting rods respectively being hinged to a fourth connecting rod, the leg support assembly being hinged to two fifth connecting rods, and the third, fourth and fifth connecting rods located on the same side are all hinged to the same point, the first push rod can push and pull the connecting shaft to move back and forth relative to the seat basin, so that the leg support assembly as a whole rotates relative to the seat basin.

[0008] When the leg support structure of this car seat unfolds and retracts, the first push rod moves axially and pushes or pulls the connecting shaft, causing the bent second link to swing up and down. When the second link swings, it also drags the third link and connecting plate, which are hinged to it, to swing together around the hinge axis between the second and first links. Simultaneously, the third link and connecting plate rotate around their respective hinge points. Furthermore, the fourth and fifth links limit the swing amplitude of the third link and connecting plate, ensuring that the leg support assembly as a whole extends only slightly in the fore-and-aft direction relative to the seat basin, and that the rotation amplitude remains within a controllable range. This allows the leg support assembly to swing up and down relative to the seat basin, unfolding or retracting. Simultaneously, the second leg rest can slide open or close relative to the first leg rest. When open, the second leg rest slides diagonally downward relative to the first leg rest, which can better assist in supporting the passenger's legs without significantly increasing the required front and rear space. In addition, the first, second, third, fourth, and fifth links are respectively set along the left and right directions of the car seat. Compared with the existing four-link structure set along the front and rear directions of the car seat, it can significantly reduce the opening range of the leg rest assembly relative to the seat basin, thereby reducing the space required for the car seat leg rest to extend. This makes the leg rest structure suitable for both new energy compact cars and small cars, as well as large vehicles, with good versatility.

[0009] In the aforementioned leg support structure for a car seat, two connecting plates are connected to the first leg support, each perpendicular to it. The second and fifth connecting rods are hinged to the two ends of the connecting plates on the same side. The end of the first connecting rod near the leg support assembly is curved upwards and hinged to the second connecting rod. The second, first, fourth, third, and fifth connecting rods on the same side are distributed sequentially from the inside out. These five connecting rods are arranged sequentially along the left-right direction of the car seat. Furthermore, the second connecting rod is bent, allowing this leg support structure to better reduce the extension range of the leg support assembly relative to the seat basin, thereby reducing the space required for the car seat leg support to extend.

[0010] In the aforementioned leg support structure for a car seat, a support tube parallel to a connecting shaft is fixedly connected between the two first connecting rods. A fixing plate perpendicular to the seat basin is fixedly connected to the support tube. A first motor for driving the first push rod to move back and forth relative to the car seat is mounted on the fixing plate. An arc-shaped plate is fixedly connected to the connecting shaft, and the front end of the first push rod is hinged to the arc-shaped plate. The support tube and the fixing plate on the support tube not only facilitate the installation and fixation of the first motor but also enhance the structural strength of the leg support structure. By setting the arc-shaped plate, the first push rod can better push the connecting shaft and the second connecting rod fixed to the connecting shaft to swing up and down, thereby better realizing the expansion or folding of the leg support assembly in the back and forth direction.

[0011] In the aforementioned leg support structure for a car seat, the second leg support is U-shaped and connected to L-shaped mounting plates on both sides. The first leg support is located between the mounting plates and the second leg support and is connected to an upper slide rail arranged along the front-rear direction of the car seat. A lower slide rail arranged along the front-rear direction of the car seat is connected to the mounting plates, and the upper slide rail is slidably mounted on the lower slide rail. This allows the second leg support to move more precisely and smoothly relative to the first leg support when unfolding or retracting, and the second leg support can be concealed within the first leg support when retracted.

[0012] In the aforementioned leg support structure for a car seat, a second push rod is fixedly connected to the second leg support along the front-rear direction of the car seat and is perpendicular to the connecting shaft. A second motor is mounted on the first leg support to drive the second push rod to move back and forth relative to the first leg support. This enables electric control of the second leg support to expand or retract relative to the first leg support.

[0013] In the aforementioned leg support structure for a car seat, the two second links are respectively connected to both ends of the connecting shaft via a Z-shaped support plate. This allows the connecting shaft to better drive the two second links to swing synchronously, thereby improving the reliability of the leg support structure of this car seat.

[0014] Compared with existing technologies, the advantages of the leg support structure of this car seat are as follows: When the leg support structure of this car seat is unfolded and folded, the first push rod moves along its axis and pushes or pulls the connecting shaft to drive the bent second link to swing up and down. When the second link swings, it can also drag the third link and the connecting plate that are hinged to it to swing together around the hinge axis between the second link and the first link. At the same time, the third link and the connecting plate rotate around their respective hinge points. The fourth link and the fifth link can respectively limit the swing amplitude of the third link and the connecting plate, thereby realizing the up and down swing of the leg support assembly relative to the seat basin to unfold or fold. Meanwhile, the second leg support can slide to unfold or fold relative to the first leg support. In addition, the first link, second link, third link, fourth link and fifth link are respectively arranged along the left and right directions of the car seat. Compared with the existing four-link structure arranged along the front and rear directions of the car seat, it can significantly reduce the unfolding amplitude of the leg support assembly relative to the seat basin, thereby reducing the space required for the extension of the car seat leg support. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the leg support structure of this car seat when it is extended.

[0016] Figure 2 This is a three-dimensional structural diagram of the leg support structure of this car seat when extended and viewed from below.

[0017] Figure 3 This is a side view of the leg support structure of this car seat when it is extended.

[0018] Figure 4 This is a 3D structural diagram of the leg support structure of this car seat when it is folded up.

[0019] Figure 5 This is a three-dimensional structural diagram of the leg support structure of this car seat when it is folded up, viewed from below.

[0020] Figure 6 This is a side view of the leg support structure of this car seat when it is folded up.

[0021] In the diagram, 1. Seat basin; 2. Leg support assembly; 2a. First leg support; 2b. Second leg support; 3. First push rod; 4. First connecting rod; 5. Connecting shaft; 6. Second connecting rod; 7. Third connecting rod; 8. Fourth connecting rod; 9. Fifth connecting rod; 10. Connecting plate; 11. Support tube; 12. Fixing plate; 13. First motor; 14. Arc plate; 15. Mounting plate; 16. Upper slide rail; 17. Lower slide rail; 18. Second push rod; 19. Second motor; 20. Support plate. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] A leg support structure for a car seat, referenced Figure 1-6 The car seat includes a seat basin 1. This leg support structure includes a leg support assembly 2 disposed in front of the seat basin 1. The leg support assembly 2 includes a first leg support 2a and a second leg support 2b slidably connected to the first leg support 2a. This leg support structure also includes a first push rod 3 disposed along the front-rear direction of the car seat. Two first connecting rods 4 are fixedly connected to the seat basin 1. A connecting shaft 5, hinged to the first push rod 3, is disposed between the seat basin 1 and the leg support assembly 2 along the left-right direction of the car seat. Two bent second connecting rods 6 are fixedly connected to both ends of the connecting shaft 5. One end of the two second links 6 is hinged to the first link 4 on the same side, and the other ends of the two second links 6 are hinged to the leg support assembly 2. The middle parts of the two second links 6 are respectively hinged to the third link 7, and the middle parts of the two first links 4 are respectively hinged to the fourth link 8. The leg support assembly 2 is hinged to two fifth links 9, and the third link 7, fourth link 8 and fifth link 9 on the same side are all hinged to the same point. The first push rod 3 can push and pull the connecting shaft 5 to move back and forth relative to the seat 1, so that the leg support assembly 2 as a whole can rotate relative to the seat 1.

[0024] Reference Figure 2 and Figure 5 Specifically, the first leg support 2a is connected to two connecting plates 10 that are respectively perpendicular to it. The second connecting rod 6 and the fifth connecting rod 9 are respectively hinged to the two ends of the connecting plate 10 on the same side. The end of the first connecting rod 4 near the leg support assembly 2 is curved upward and hinged to the second connecting rod 6. The second connecting rod 6, the first connecting rod 4, the fourth connecting rod 8, the third connecting rod 7 and the fifth connecting rod 9 located on the same side are distributed from the inside to the outside in sequence.

[0025] Reference Figure 2 and Figure 5 More specifically, a support tube 11 parallel to the connecting shaft 5 is fixed between the two first connecting rods 4. A fixing plate 12 perpendicular to the seat 1 is fixed to the support tube 11. A first motor 13 for driving the first push rod 3 to move back and forth relative to the car seat is installed on the fixing plate 12. An arc-shaped plate 14 is fixed to the connecting shaft 5. The front end of the first push rod 3 is hinged to the arc-shaped plate 14.

[0026] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6More specifically, the second leg rest 2b is U-shaped and has L-shaped mounting plates 15 connected to both sides. The first leg rest 2a is located between the mounting plates 15 and the second leg rest 2b and is connected to an upper slide rail 16 arranged along the front-rear direction of the car seat. A lower slide rail 17 arranged along the front-rear direction of the car seat is connected to the mounting plate 15, and the upper slide rail 16 is slidably mounted on the lower slide rail 17. The second leg rest 2b is fixedly connected to a second push rod 18 arranged perpendicular to the connecting shaft 5 along the front-rear direction of the car seat. A second motor 19 for driving the second push rod 18 to move back and forth relative to the first leg rest 2a is installed on the first leg rest 2a.

[0027] In this embodiment, the two second connecting rods 6 are preferably connected to the two ends of the connecting shaft 5 by a Z-shaped support plate 20.

[0028] The following explains the working principle of the leg support structure of this car seat:

[0029] When the leg support structure of this car seat needs to be unfolded, the first motor 13 drives the first push rod 3 to move forward along its axis relative to the car seat. The first push rod 3 pushes the connecting shaft 5 and two second connecting rods 6 fixed to the connecting shaft 5 by the support plate 20 to swing upward through the arc plate 14. When the second connecting rod 6 swings upward, it can drag the third connecting rod 7 and the connecting plate 10 hinged to it to swing together around the hinge axis between the second connecting rod 6 and the first connecting rod 4. At the same time, the third connecting rod 7 and the connecting plate 10 rotate around their respective hinge points. Since the distance between the hinge point of the third connecting rod 7 and the second connecting rod 6 and the hinge point of the second connecting rod 6 and the first connecting rod 4 is smaller than the distance between the connecting plate 10 and the second connecting rod 4, the second connecting rod 6 and the second connecting rod 6 rotate around their respective hinge points. The distance between the hinge point of the two connecting rods 6 and the hinge point of the second connecting rod 6 and the first connecting rod 4 is such that the linear velocity of the upward swing of the third connecting rod 7 is greater than the linear velocity of the upward swing of the connecting plate 10. The fourth connecting rod 8 and the fifth connecting rod 9 can respectively limit the swing amplitude of the third connecting rod 7 and the connecting plate 10, thereby realizing that the leg support assembly 2 as a whole swings upward relative to the seat 1 to a predetermined position. The second motor 19 installed on the first leg support 2a drives the second push rod 18 to move forward relative to the car seat along its axis. When the second push rod 18 moves forward, it can drive the second leg support 2b connected to it to slide forward synchronously along the upper slide rail 16, so that the second leg support 2b unfolds relative to the first leg support 2a.

[0030] When the leg support structure of this car seat needs to be folded, the first motor 13 drives the first push rod 3 to move backward relative to the car seat along its axis. The first push rod 3 pushes the connecting shaft 5 and the two second connecting rods 6 fixed to the connecting shaft 5 by the support plate 20 to swing downward through the arc plate 14. When the second connecting rod 6 swings downward, it can drag the third connecting rod 7 and the connecting plate 10 that are hinged to it to swing together around the hinge axis between the second connecting rod 6 and the first connecting rod 4. At the same time, the third connecting rod 7 and the connecting plate 10 rotate around their respective hinge points, thereby realizing the downward swing and reset of the leg support assembly 2 relative to the seat 1. The second motor 19 installed on the first leg support 2a drives the second push rod 18 to move backward relative to the car seat along its axis. When the second push rod 18 moves backward, it can drive the second leg support 2b connected to it to slide backward synchronously along the upper slide rail 16, so that the second leg support 2b retracts and closes relative to the first leg support 2a.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A leg support structure for a car seat, the car seat including a seat basin (1), the leg support structure including a leg support assembly (2) disposed in front of the seat basin (1), the leg support assembly (2) including a first leg support (2a) and a second leg support (2b) slidably connected to the first leg support (2a), characterized in that, This leg rest structure also includes a first push rod (3) arranged along the front-rear direction of the car seat. Two first connecting rods (4) are fixedly connected to the seat basin (1). A connecting shaft (5) hinged to the first push rod (3) is arranged between the seat basin (1) and the leg rest assembly (2) along the left-right direction of the car seat. Two bent second connecting rods (6) are fixedly connected to both ends of the connecting shaft (5). One end of each of the two second connecting rods (6) is hinged to the first connecting rod (4) on the same side, and the other end of each of the two second connecting rods (6) is hinged to the leg rest assembly (2). The two second links (6) are hinged to the middle part of the third link (7), and the two first links (4) are hinged to the middle part of the fourth link (8). The leg support assembly (2) is hinged to two fifth links (9), and the third link (7), fourth link (8) and fifth link (9) on the same side are all hinged to the same point. The first push rod (3) can push and pull the connecting shaft (5) to move back and forth relative to the seat (1), so that the leg support assembly (2) as a whole rotates relative to the seat (1).

2. The leg support structure of a car seat according to claim 1, characterized in that, The first leg support (2a) is connected to two connecting plates (10) that are perpendicular to it. The second link (6) and the fifth link (9) are respectively hinged to the two ends of the connecting plate (10) on the same side. The end of the first link (4) near the leg support assembly (2) is curved upward and hinged to the second link (6). The second link (6), the first link (4), the fourth link (8), the third link (7) and the fifth link (9) on the same side are distributed from the inside to the outside in sequence.

3. The leg support structure for a car seat according to claim 1, characterized in that, A support tube (11) parallel to the connecting shaft (5) is fixed between the two first connecting rods (4). A fixing plate (12) perpendicular to the seat basin (1) is fixed on the support tube (11). A first motor (13) for driving the first push rod (3) to move back and forth relative to the car seat is installed on the fixing plate (12). An arc plate (14) is fixed on the connecting shaft (5). The front end of the first push rod (3) is hinged to the arc plate (14).

4. A leg support structure for a car seat according to claim 1, 2, or 3, characterized in that, The second leg rest (2b) is U-shaped and has L-shaped mounting plates (15) connected to both sides. The first leg rest (2a) is located between the mounting plate (15) and the second leg rest (2b) and is connected to an upper slide rail (16) arranged along the front-rear direction of the car seat. A lower slide rail (17) arranged along the front-rear direction of the car seat is connected to the mounting plate (15). The upper slide rail (16) is slidably mounted on the lower slide rail (17).

5. The leg support structure for a car seat according to claim 4, characterized in that, The second leg rest (2b) is fixedly connected to a second push rod (18) that is perpendicular to the connecting shaft (5) along the front-back direction of the car seat. The first leg rest (2a) is equipped with a second motor (19) for driving the second push rod (18) to move back and forth relative to the first leg rest (2a).

6. A leg support structure for a car seat according to claim 1, 2, or 3, characterized in that, The two second links (6) are respectively connected to the two ends of the connecting shaft (5) via a "Z"-shaped support plate (20).

Images