Leg rest mechanism and car seat

Abstract

The application relates to the technical field of automobile seats, in particular to a leg support mechanism, wherein a linear driving mechanism is fixed on a first fixed support; a first end of a first connecting rod is rotationally connected with the first fixed support, a second end of the first connecting rod is rotationally connected with a head end of the linear driving mechanism and a first end of a second connecting rod, a second end of the second connecting rod is rotationally connected with a first end of a third connecting rod, and a second end of the third connecting rod is fixedly connected with a leg support driving rod; the leg support driving rod is connected with a leg support pot assembly through a rotating mechanism; the linear driving mechanism can drive the leg support driving rod to rotate through the first connecting rod, the second connecting rod and the third connecting rod, so that the leg support driving rod drives the leg support pot assembly to rotate through the rotating mechanism. The leg support mechanism and the automobile seat solve the problem that the leg support mechanism on the market is unstable and shakes when the opening angle of the leg support is too large or the load is too large.

Description

Technical Field

[0001] This application relates to the field of automotive seat technology, and in particular to a leg support mechanism and an automotive seat. Background Technology

[0002] As users and OEMs increase their demands for car seat comfort, the opening angle of car seat leg rests is also getting larger and larger to meet customers' needs for comfort and other in-vehicle scenarios.

[0003] Most leg support mechanisms on the market today involve a motor and a rotating arm plate (linkage). Due to the characteristics of the linkage itself, when the leg support angle approaches or exceeds 90°, the angle between the motor lead screw and the rotating arm plate will be too small. When the leg support opening angle is too large or the load is too large, there will be problems of instability and shaking. Utility Model Content

[0004] The purpose of this application is to provide a leg support mechanism and a car seat, thereby solving the problem of instability and wobbling that occurs in current leg support mechanisms on the market when the leg support opens too wide or is subjected to excessive load.

[0005] According to a first aspect of this application, a leg support mechanism is provided, comprising a first fixed bracket, a linear drive mechanism, a first connecting rod, a second connecting rod, a third connecting rod, a leg support drive rod, a rotating mechanism, and a leg support basin assembly; the linear drive mechanism is fixed to the first fixed bracket; a first end of the first connecting rod is rotatably connected to the first fixed bracket, a second end of the first connecting rod is rotatably connected to the head end of the linear drive mechanism and the first end of the second connecting rod, a second end of the second connecting rod is rotatably connected to the first end of the third connecting rod, and a second end of the third connecting rod is fixedly connected to the leg support drive rod; the leg support drive rod is connected to the leg support basin assembly through the rotating mechanism, and the linear drive mechanism can drive the leg support drive rod to rotate through the first connecting rod, the second connecting rod, and the third connecting rod, so that the leg support drive rod drives the leg support basin assembly to rotate through the rotating mechanism.

[0006] In any of the above technical solutions, the linear drive mechanism further includes a motor and a lead screw; the motor is fixed on the first fixed bracket and connected to the lead screw to drive the lead screw to perform linear motion, and the second end of the first connecting rod is rotatably connected to the head end of the lead screw and the first end of the second connecting rod.

[0007] In any of the above technical solutions, the rotating mechanism further includes a first set of linkage assemblies; the first set of linkage assemblies connects both the first fixed bracket and the leg support drive rod to the leg support assembly; the first set of linkage assemblies includes a fourth link and a sixth link; the first end of the fourth link is fixedly connected to the leg support drive rod, the second end of the fourth link is rotatably connected to the leg support assembly, the first end of the sixth link is rotatably connected to the first fixed bracket, the second end of the sixth link is rotatably connected to the leg support assembly, and the middle portions of the fourth link and the middle portions of the sixth link are rotatably connected.

[0008] In any of the above technical solutions, the first group of linkages further includes a fifth linkage; the first end of the fifth linkage is rotatably connected to the first fixed bracket, and the second end of the fifth linkage is rotatably connected to the first end of the sixth linkage.

[0009] In any of the above technical solutions, the first group of linkages further includes a seventh linkage; the first end of the seventh linkage is rotatably connected to the second end of the fourth linkage, and the second end of the seventh linkage is rotatably connected to the leg support assembly.

[0010] In any of the above technical solutions, the leg support mechanism further includes a second fixed bracket; the rotating mechanism further includes a second set of linkage assemblies, the first set of linkage assemblies and the second set of linkage assemblies having the same structure; the second set of linkage assemblies connects the second fixed bracket and the leg support drive rod to the leg support basin assembly.

[0011] In any of the above technical solutions, the first fixed bracket and the first set of connecting rod assemblies are arranged parallel to the second fixed bracket and the second set of connecting rod assemblies, and are respectively arranged on both sides of the leg support assembly.

[0012] In any of the above technical solutions, the two ends of the leg support drive rod are rotatably connected to the first fixed bracket and the second fixed bracket through fastening kits.

[0013] In any of the above technical solutions, the leg support mechanism further includes a front horizontal tube, and the first fixed bracket and the second fixed bracket are respectively fixed on the front horizontal tube.

[0014] According to a second aspect of this application, an automobile seat is provided, including the leg support mechanism described above.

[0015] The leg support mechanism of this application includes a first fixed bracket, a linear drive mechanism, a first connecting rod, a second connecting rod, a third connecting rod, a leg support drive rod, a rotating mechanism, and a leg support assembly. The linear drive mechanism is fixed to the first fixed bracket; the first end of the first connecting rod is rotatably connected to the first fixed bracket, the second end of the first connecting rod is rotatably connected to the head end of the linear drive mechanism and the first end of the second connecting rod, the second end of the second connecting rod is rotatably connected to the first end of the third connecting rod, and the second end of the third connecting rod is fixedly connected to the leg support drive rod; the leg support drive rod is connected to the leg support assembly via the rotating mechanism. During movement, the linear drive mechanism can drive the leg support drive rod to rotate via the first, second, and third connecting rods, so that the leg support drive rod drives the leg support assembly to rotate via the rotating mechanism.

[0016] Based on the above technical features, the beneficial effects of this application are as follows: In this application, the second end of the first link of the leg support mechanism, the head end of the linear drive mechanism, and the first end of the second link are coaxially rotatably connected. When the leg support mechanism rotates, the linear drive mechanism pushes (pulls) the first link and the second link, and the second end of the second link pushes (pulls) the third link, causing the leg support drive rod to rotate. The leg support drive rod then drives the leg support assembly to rotate through the rotation mechanism.

[0017] The leg support mechanism of this application, without changing the third link and linear drive mechanism, only adds two links (the first link and the second link), which can greatly improve the stability and load-bearing capacity of the leg support mechanism when used at large angles. This solution can also be used to design leg support mechanisms with larger angles (over 90°).

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of the leg support mechanism according to an embodiment of this application is shown; Figure 2 A comparative schematic diagram showing the leg support mechanism in the open position in the prior art and in this application is provided. Figure 3 A comparative schematic diagram showing the leg support mechanism in the prior art and the present application in the initial position is shown.

[0021] Icons: 1-Side plate; 2-Front cross tube; 3-First fixed bracket; 4-Motor; 5-First link; 6-Rotating assembly; 7-Second link; 8-Third link; 9-Leg support drive rod; 10-Fourth link; 11-Second fixed bracket; 12-Fastening assembly; 13-Fifth link; 14-Sixth link; 15-Leg support basin assembly; 16-Seventh link. Detailed Implementation

[0022] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0023] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0024] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0025] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0026] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0027] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0028] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0029] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0030] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0031] Prior to this application, most leg support mechanisms on the market consist of a motor and a rotating arm plate (linkage). Due to the characteristics of the linkage itself, when the leg support angle is close to or even exceeds 90°, the angle between the motor lead screw and the rotating arm plate will be too small. When the leg support opening angle is too large or the load is too large, there will be problems of instability and shaking.

[0032] In view of this, the first aspect of this application provides a leg support mechanism, thereby solving the problem of instability and wobbling that occurs in existing leg support mechanisms when the leg support opening angle is too large or the load is too heavy. See below for reference. Figures 1 to 3 This application describes a leg support mechanism according to some embodiments.

[0033] like Figure 1 As shown, the leg support mechanism of this application includes a first fixed bracket 3, a linear drive mechanism, a first connecting rod 5, a second connecting rod 7, a third connecting rod 8, a leg support drive rod 9, a rotating mechanism, and a leg support assembly 15. The linear drive mechanism is fixed to the first fixed bracket 3. The first end of the first connecting rod 5 is rotatably connected to the first fixed bracket 3, the second end of the first connecting rod 5 is rotatably connected to the head end of the linear drive mechanism and the first end of the second connecting rod 7, the second end of the second connecting rod 7 is rotatably connected to the first end of the third connecting rod 8, and the second end of the third connecting rod 8 is fixedly connected to the leg support drive rod 9. The leg support drive rod 9 is connected to the leg support assembly 15 via the rotating mechanism. During movement, the linear drive mechanism can drive the leg support drive rod 9 to rotate via the first connecting rod 5, the second connecting rod 7, and the third connecting rod 8, so that the leg support drive rod 9 drives the leg support assembly 15 to rotate via the rotating mechanism.

[0034] As described above, the second end of the first link 5 of the leg support mechanism, the head end of the linear drive mechanism, and the first end of the second link 7 are coaxially rotatably connected. When the leg support mechanism rotates, the linear drive mechanism pushes (pulls) the first link 5 and the second link 7, and the second end of the second link 7 pushes (pulls) the third link 8, causing the leg support drive rod 9 to rotate. The leg support drive rod 9 then drives the leg support assembly 15 to rotate through the rotation mechanism.

[0035] The leg support mechanism of this application, without changing the third link 8 and the linear drive mechanism, only adds two links (the first link 5 and the second link 7), which can greatly improve the stability and load-bearing capacity of the leg support mechanism when used at large angles. Furthermore, this solution can be used to design leg support mechanisms with even larger angles (over 90°).

[0036] In the embodiments of this application, such as Figure 1As shown, the linear drive mechanism may include a motor 4 and a lead screw. The motor 4 is fixed on the first fixed bracket 3 and connected to the lead screw to drive the lead screw to perform linear motion. The second end of the first connecting rod 5, the head end of the lead screw, and the first end of the second connecting rod 7 are coaxially rotatably connected. In other words, the leg support mechanism of this application increases the support stability by adding two connecting rods (the first connecting rod 5 and the second connecting rod 7) to optimize the angle of the lead screw and the third connecting rod 8 at large angles.

[0037] In the embodiments of this application, such as Figure 1 As shown, the rotating mechanism may include a first set of linkage assemblies. The first set of linkage assemblies connects both the first fixed bracket 3 and the leg support drive rod 9 to the leg support assembly 15. Specifically, the first set of linkage assemblies includes a fourth link 10 and a sixth link 14; the first end of the fourth link 10 is fixedly connected to the leg support drive rod 9, and the second end of the fourth link 10 is rotatably connected to the leg support assembly 15; the first end of the sixth link 14 is rotatably connected to the first fixed bracket 3, and the second end of the sixth link 14 is rotatably connected to the leg support assembly 15; the middle portions of the fourth link 10 and the middle portions of the sixth link 14 are rotatably connected.

[0038] Furthermore, to enhance the transmission effect and stability of the rotating mechanism, the first linkage assembly also includes a fifth linkage 13 and a seventh linkage 16. The first end of the fifth linkage 13 is rotatably connected to the first fixed bracket 3, the second end of the fifth linkage 13 is rotatably connected to the first end of the sixth linkage 14, the first end of the seventh linkage 16 (arc-shaped linkage) is rotatably connected to the second end of the fourth linkage 10, and the second end of the seventh linkage 16 is rotatably connected to the leg support assembly 15.

[0039] Furthermore, in order to increase the transmission effect and stability of the rotating mechanism, such as Figure 1 As shown, the leg support mechanism of this application further includes a second fixed bracket 11; the rotating mechanism further includes a second set of linkage assemblies. The first set of linkage assemblies and the second set of linkage assemblies have the same structure. The second set of linkage assemblies connects the second fixed bracket 11 and the leg support drive rod 9 to the leg support assembly 15. The first fixed bracket 3 and the first set of linkage assemblies are arranged parallel to the second fixed bracket 11 and the second set of linkage assemblies, and are respectively located on both sides of the leg support assembly 15.

[0040] It should be noted that the first and second linkage assemblies have the same structure. This means that the second linkage assembly also includes the fourth link 10, the sixth link 14, the fifth link 13, and the seventh link 16, and the connection relationships between the fourth link 10, the sixth link 14, the fifth link 13, and the seventh link 16 are the same, and their structures are largely the same, except for the machining tolerances or special structures (such as holes, slots, etc.) of each link. The connection relationship of the second linkage assembly in this application is as follows: The first end of the fourth link 10 is fixedly connected to the leg support drive rod 9, and the second end of the fourth link 10 is rotatably connected to the leg support assembly 15. The first end of the sixth link 14 is rotatably connected to the second fixed bracket 11, and the second end of the sixth link 14 is rotatably connected to the leg support assembly 15. The middle part of the fourth link 10 and the middle part of the sixth link 14 are rotatably connected. Furthermore, in order to increase the transmission effect and stability of the rotating mechanism, the first end of the fifth link 13 is rotatably connected to the second fixed bracket 11, the second end of the fifth link 13 is rotatably connected to the first end of the sixth link 14, the first end of the seventh link 16 (arc-shaped link) is rotatably connected to the second end of the fourth link 10, and the second end of the seventh link 16 is rotatably connected to the leg support assembly 15.

[0041] In summary, the seat leg support mechanism that can be unfolded at a large angle in this application includes a side plate 1, a front cross tube 2, a first fixed bracket 3 and a second fixed bracket 11. The motor 4 is fixed on the first fixed bracket 3. One end of the first connecting rod 5 and the second connecting rod 7 are coaxially rotatably connected to the lead screw of the motor 4. The other end of the second connecting rod 7 pushes the third connecting rod 8, which drives the leg support drive rod 9, the rotating mechanism and the leg support basin assembly 15 (the leg support drive rod 9, the fourth connecting rod 10, the fifth connecting rod 13, the sixth connecting rod 14, the seventh connecting rod 16 and the leg support basin assembly 15 form a double quadrilateral rotating mechanism) to rotate.

[0042] like Figure 1 As shown, the side plate 1 and the front cross tube 2 are fixed. The first fixed bracket 3 and the second fixed bracket 11 are respectively fixed on the front cross tube 2. The motor 4 is fixed on the first fixed bracket 3. One end of the first connecting rod 5 is connected to the first fixed bracket 3 through the rotating kit 6, and the other end is rotatably connected to the lead screw of the motor 4 and one end of the second connecting rod 7. The other end of the second connecting rod 7 is rotatably connected to one end of the third connecting rod 8. The third connecting rod 8, the leg support drive rod 9, and the fourth connecting rod 10 are fixed as one unit and are rotatably connected to the first fixed bracket 3 and the second fixed bracket 11 through the fastening kit 12. One end of the fifth connecting rod 13 is rotatably connected to the first fixed bracket 3 (second fixed bracket 11), and the other end is rotatably connected to one end of the sixth connecting rod 14. The sixth connecting rod 14 is rotatably connected to the fourth connecting rod 10 and the leg support assembly 15. The other end of the fourth connecting rod 10 is rotatably connected to one end of the seventh connecting rod 16, and the other end of the seventh connecting rod 16 is rotatably connected to the leg support assembly 15.

[0043] like Figure 1 As shown, the first link 5 and the second link 7 of this application can distribute the force component when the leg support is subjected to force at a large angle, thereby improving the stability of the leg support mechanism and allowing for the design of a larger rotation angle. Figure 2 , Figure 3 As shown, by adding the first link 5 and the second link 7, this application can improve the stress situation of the leg support at a large angle, and enhance the stability and load-bearing performance of the mechanism.

[0044] A second aspect of this application provides an automobile seat including a leg support mechanism as described above.

[0045] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in this application, or make equivalent substitutions for some of the technical features. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application.

Claims

1. A leg support mechanism, characterized in that, The leg support mechanism includes a first fixed bracket, a linear drive mechanism, a first connecting rod, a second connecting rod, a third connecting rod, a leg support drive rod, a rotating mechanism, and a leg support basin assembly; The linear drive mechanism is fixed on the first fixed bracket; the first end of the first connecting rod is rotatably connected to the first fixed bracket, the second end of the first connecting rod is rotatably connected to the head end of the linear drive mechanism and the first end of the second connecting rod, the second end of the second connecting rod is rotatably connected to the first end of the third connecting rod, and the second end of the third connecting rod is fixedly connected to the leg support drive rod. The leg support drive rod is connected to the leg support assembly via the rotating mechanism. The linear drive mechanism can drive the leg support drive rod to rotate via the first link, the second link, and the third link, so that the leg support drive rod drives the leg support assembly to rotate via the rotating mechanism.

2. The leg support mechanism according to claim 1, characterized in that, The linear drive mechanism includes a motor and a lead screw; The motor is fixed on the first fixed bracket and connected to the lead screw to drive the lead screw to make linear motion. The second end of the first connecting rod is rotatably connected to the head end of the lead screw and the first end of the second connecting rod.

3. The leg support mechanism according to claim 1, characterized in that, The rotating mechanism includes a first set of linkage assemblies; the first set of linkage assemblies connects both the first fixed bracket and the leg support drive rod to the leg support basin assembly; The first linkage assembly includes a fourth link and a sixth link; The first end of the fourth link is fixedly connected to the leg support drive rod, the second end of the fourth link is rotatably connected to the leg support assembly, the first end of the sixth link is rotatably connected to the first fixed bracket, the second end of the sixth link is rotatably connected to the leg support assembly, and the middle part of the fourth link and the middle part of the sixth link are rotatably connected.

4. The leg support mechanism according to claim 3, characterized in that, The first linkage assembly also includes a fifth linkage; The first end of the fifth link is rotatably connected to the first fixed bracket, and the second end of the fifth link is rotatably connected to the first end of the sixth link.

5. The leg support mechanism according to claim 4, characterized in that, The first linkage assembly also includes a seventh linkage; The first end of the seventh link is rotatably connected to the second end of the fourth link, and the second end of the seventh link is rotatably connected to the leg support assembly.

6. The leg support mechanism according to claim 5, characterized in that, The leg support mechanism also includes a second fixed bracket; the rotating mechanism also includes a second set of linkage assemblies, and the first set of linkage assemblies and the second set of linkage assemblies have the same structure. The second set of linkage assemblies connects both the second fixed bracket and the leg support drive rod to the leg support basin assembly.

7. The leg support mechanism according to claim 6, characterized in that, The first fixed bracket and the first set of connecting rods are arranged parallel to the second fixed bracket and the second set of connecting rods, and are respectively located on both sides of the leg support assembly.

8. The leg support mechanism according to claim 7, characterized in that, Both ends of the leg support drive rod are rotatably connected to the first fixed bracket and the second fixed bracket via fastening kits.

9. The leg support mechanism according to claim 6, characterized in that, The leg support mechanism also includes a front horizontal tube, and the first fixed bracket and the second fixed bracket are respectively fixed on the front horizontal tube.

10. A car seat, characterized in that, Includes the leg support mechanism as described in any one of claims 1-9.

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