Electric leg support mechanism of automobile seat

Abstract

The utility model discloses an electric leg support mechanism of an automobile seat, which comprises a seat basin and a leg support supporting plate, the leg support supporting plate is arranged above the seat basin through a driving mechanism in a front-back sliding mode, the driving mechanism is arranged below the seat basin, the driving mechanism penetrates through the seat basin to be connected with the leg support supporting plate, and the driving mechanism can drive the leg support supporting plate to slide front and back. The driving mechanism is arranged below the seat basin instead of being arranged between the seat basin and the leg support supporting plate, so that the structure between the seat basin and the leg support supporting plate is compact, the situation that the driving mechanism extrudes the space of seat foam, and consequently the comfort of a seat is reduced is avoided, the space below the seat basin is large, and installation is convenient; more importantly, the driving assembly is prevented from being exposed to be in contact with seat foam when the leg support supporting plate slides forwards to be opened, that is, interference between the driving assembly and the seat foam is effectively avoided, and the driving mechanism is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to an electric leg support mechanism of an automobile seat. Background Art

[0002] The leg rest extension mechanism of a car seat can improve the riding comfort of passengers. The existing leg rest extension mechanism is divided into two modes: manual control and electric control. The electric leg rest extension mechanism is more convenient to operate and can achieve stepless adjustment. The electric leg rest extension mechanism includes a drive assembly. The existing drive assembly is usually installed between the seat basin and the leg rest support plate. In order to leave enough installation space for the drive assembly, the seat cushion is often positioned too high, squeezing the space of the seat foam, resulting in reduced seat comfort. Moreover, when the leg rest support plate slides forward and opens, the drive assembly will be exposed and contact with the seat foam (the foam sinks under pressure), causing interference between the two; for example, when the drive assembly is a screw-nut mechanism, its screw is prone to interfere with the seat foam. Utility Model Content

[0003] In view of the above problems existing in the prior art, the utility model aims to provide an electric leg rest mechanism for a car seat, so as to achieve a thin design of the seat cushion and avoid interference between the electric leg rest mechanism and the seat foam.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes an electric leg rest mechanism for a car seat, comprising a seat basin and a leg rest support plate, wherein the leg rest support plate is arranged above the seat basin and slides back and forth through a driving mechanism, and the driving mechanism is installed below the seat basin, the driving mechanism passes through the seat basin and is connected to the leg rest support plate, and the driving mechanism can drive the leg rest support plate to slide back and forth.

[0005] In the above scheme: the driving mechanism includes a motor, a screw and a nut, the motor is fixed to the bottom surface of the seat basin through a motor bracket, the screw extends forward and backward and is connected to the driving shaft of the motor, the nut is threadedly sleeved on the screw, and both ends of the nut are provided with connecting columns upward, and the seat basin is provided with two strip holes extending forward and backward corresponding to the two connecting columns, and the two connecting columns pass through the two strip holes one by one and are connected to the leg support plate. When the motor is working, it can drive the screw to rotate, so that the nut moves forward and backward, thereby driving the connecting column to slide forward and backward along the strip hole, and then driving the leg support plate to slide forward and backward.

[0006] In the above scheme: an avoidance hole is opened on the seat basin, the top of the motor and the motor bracket are located in the avoidance hole, the position corresponding to the screw rod on the seat basin is arched upward to form an arched avoidance groove extending front and back, and the upper part of the screw rod is located in the arched avoidance groove, which has a compact structure, further reducing the height space occupied by the drive mechanism, and realizing a thin design of the seat cushion.

[0007] In the above scheme: it also includes a guiding mechanism, which includes a long hole set on the leg rest support plate and a friction block set on the seat basin, and the friction block is provided with a guide column passing through the long hole and connected with the leg rest support plate. The guiding mechanism has a simple structure and is easy to process, and plays a guiding role when the leg rest support plate slides back and forth.

[0008] In the above scheme: there are two groups of guide mechanisms, and the two groups of guide mechanisms are arranged symmetrically on the left and right. Each group of guide mechanisms includes two long holes spaced apart in the left and right directions and two guide columns passing through the two long holes one by one. The two guide columns are installed together on a friction block. The guide columns can specifically be a bolt structure, which is easy to process and simple to assemble.

[0009] In the above scheme: a reinforcing plate is welded on the seat basin at the installation position corresponding to the friction block, the friction block is fixed on the reinforcing plate, and the reinforcing plate and the seat basin are welded as a whole, which is beneficial to improve the strength at the corresponding position.

[0010] The beneficial effects of the present invention are as follows: by changing the drive mechanism from being arranged between the seat basin and the leg rest support plate to being arranged below the seat basin, the structure between the seat basin and the leg rest support plate is made compact, thereby avoiding the drive mechanism squeezing the space of the seat foam and reducing the seat comfort, and the space below the seat basin is large, which is convenient for installation; more importantly, it avoids the drive component from being exposed and contacting the seat foam when the leg rest support plate slides forward and opens, that is, it effectively avoids interference between the drive component and the seat foam, which is beneficial to protecting the drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the assembly of the seat basin and the leg support plate.

[0012] Figure 2 It is an exploded schematic diagram of the seat basin and leg rest support plate.

[0013] Figure 3 yes Figure 2 Top view of the .

[0014] Figure 4 This is a bottom view of the basin. DETAILED DESCRIPTION

[0015] like Figure 1 As shown in FIG. 4 , an electric leg rest mechanism of a car seat is mainly composed of a seat basin 1 and a leg rest support plate 2.

[0016] The leg rest support plate 2 is slidably arranged above the seat basin 1 through the driving mechanism 3, and the driving mechanism 3 is installed below the seat basin 1. The driving mechanism 3 passes through the seat basin 1 and is connected to the leg rest support plate 2. The driving mechanism 3 can drive the leg rest support plate 2 to slide forward and backward.

[0017] Preferably, the driving mechanism 3 includes a motor 31, a screw rod 32 and a nut 33. The motor 31 is fixed to the bottom surface of the seat basin 1 through a motor bracket 34. The screw rod 32 extends forward and backward and is connected to the driving shaft of the motor 31. The nut 33 is threadedly sleeved on the screw rod 32. Both ends of the nut 33 are provided with connecting posts 35 upward. The seat basin 1 is provided with two strip holes extending forward and backward corresponding to the two connecting posts 35. The two connecting posts 35 pass through the two strip holes one by one and are connected to the leg support plate 2. When the motor 31 is working, it can drive the screw rod 32 to rotate, so that the nut 33 moves forward and backward, thereby driving the connecting post 35 to slide forward and backward along the strip hole, and then driving the leg support plate 2 to slide forward and backward.

[0018] Preferably, a avoidance hole 11 is opened on the seat basin 1, the top of the motor 31 and the motor bracket 34 are located in the avoidance hole 11, and the position on the seat basin 1 corresponding to the screw rod 32 is arched upward to form an arched avoidance groove 12 extending front and back, and the upper part of the screw rod 32 is located in the arched avoidance groove 12, which has a compact structure, further reducing the height space occupied by the drive mechanism 3, and realizing a thin design of the seat cushion.

[0019] Preferably, it also includes a guiding mechanism, which includes an elongated hole 21 provided on the leg rest support plate 2 and a friction block 4 provided on the seat basin, and a guide column 41 is provided on the friction block 4, which passes through the elongated hole 21 and is connected to the leg rest support plate 2. The guiding mechanism has a simple structure and is easy to process, and plays a guiding role when the leg rest support plate 2 slides back and forth.

[0020] Preferably, there are two groups of guide mechanisms, which are arranged symmetrically on the left and right. Each group of guide mechanisms includes two long holes 21 spaced apart in the left and right directions and two guide columns 41 passing through the two long holes one by one. The two guide columns 41 are installed together on a friction block 4. The guide columns 41 can specifically be a bolt structure, which is easy to process and simple to assemble.

[0021] Preferably, a reinforcing plate 5 is welded on the seat basin 1 at the installation position corresponding to the friction block 4, the friction block 4 is fixed on the reinforcing plate 5, and the reinforcing plate 5 and the seat basin 1 are welded as a whole, which is beneficial to improve the strength at the corresponding position.

Claims

1. An electric leg support mechanism for a car seat, comprising a seat pan (1) and a leg support plate (2), wherein the leg support plate (2) is arranged above the seat pan (1) by sliding forward and backward through a driving mechanism (3), and is characterized in that: The driving mechanism (3) is installed below the seat basin (1), and the driving mechanism (3) passes through the seat basin (1) and is connected to the leg support plate (2). The driving mechanism (3) can drive the leg support plate (2) to slide forward and backward.

2. The electric leg support mechanism of a car seat according to claim 1, characterized in that: The driving mechanism (3) comprises a motor (31), a screw rod (32) and a nut (33); the motor (31) is fixed to the bottom surface of the seat basin (1) through a motor bracket (34); the screw rod (32) extends forward and backward and is connected to the driving shaft of the motor (31); the nut (33) is threadedly sleeved on the screw rod (32); both ends of the nut (33) are provided with connecting columns (35) extending upward; two strip holes extending forward and backward are provided on the seat basin (1) corresponding to the two connecting columns (35); the two connecting columns (35) pass through the two strip holes one by one and are connected to the leg support plate (2).

3. The electric leg support mechanism of a car seat according to claim 2, characterized in that: The seat basin (1) is provided with an escape hole (11), the top of the motor (31) and the motor bracket (34) are located in the escape hole (11), the position of the seat basin (1) corresponding to the screw rod (32) is arched upward to form an arched escape groove (12) extending forward and backward, and the upper part of the screw rod (32) is located in the arched escape groove (12).

4. The electric leg support mechanism for a car seat according to claim 1, characterized in that: The invention also comprises a guiding mechanism, which comprises an elongated hole (21) arranged on the leg rest support plate (2) and a friction block (4) arranged on the seat basin, wherein the friction block (4) is provided with a guiding column (41) which passes through the elongated hole (21) and is connected to the leg rest support plate (2).

5. The electric leg support mechanism for a car seat according to claim 4, characterized in that: The guide mechanism comprises two groups, which are arranged symmetrically on the left and right. Each group of the guide mechanism comprises two long holes (21) spaced apart in the left and right directions and two guide columns (41) passing through the two long holes one by one. The two guide columns (41) are mounted together on a friction block (4).

6. The electric leg support mechanism for a car seat according to claim 5, characterized in that: A reinforcing plate (5) is welded on the seat basin (1) at a mounting position corresponding to the friction block (4), and the friction block (4) is fixed on the reinforcing plate (5).

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