An automobile seat comfortable reclining posture adjusting mechanism integrated with a backrest support

Abstract

The present invention provides a comfortable lying position adjustment mechanism for a car seat with an integrated backrest support, comprising a backrest support structure and a lying position support adjustment structure. The backrest support structure and the lying position support adjustment structure respectively share a main bracket on both sides, the upper end of the main bracket is hung on the upper cross beam of the seat frame through a hanging part, the backrest support structure is a supporting steel wire connecting the main brackets on both sides of the backrest position, and the lying position support adjustment structure comprises a lower part of the main bracket and an EPP support block connected to the lower end of the main bracket; the main bracket is U-shaped at the bite position of the seat cushion and the backrest, the middle position of the U-shape is rotatably connected to the rotating support shaft, and the two ends of the rotating support shaft are fixedly connected to the two sides of the seat frame. The present invention reduces or even eliminates the pressure difference at the bite position of the seat cushion and the backrest when in a lying position, thereby achieving a comfortable lying position.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seats, and in particular relates to a comfortable lying posture adjustment mechanism for an automobile seat with integrated backrest support. Background Art

[0002] Currently, when the front seats on the market are folded back, the meshing position of the backrest and the seat cushion forms a step with a high backrest and a low seat cushion. When lying down, a step pressure difference can be felt, the waist is obviously lifted up, and the area between the greater trochanter and the sacrum is suspended, which does not meet the comfort requirements of a lying position. Some seat manufacturers have paid attention to the comfort of seats in a lying position, and mainly solve this problem from two aspects: styling and adding adjustment mechanisms. The styling is subject to certain restrictions, and the styling style of the seat must be suitable. In terms of mechanisms, Yanfeng Adient proposed CN202122252105.4, a rear end lifting mechanism for the car seat, which requires the installation of a motor to provide power. In addition, Yanfeng CN20180952340.2 and Dongfeng CN202110643449.X respectively proposed relatively large modifications to the seat frame adjustment mechanism to meet the needs of lying down comfort. These are expensive and have poor universality. Summary of the Invention

[0003] The present invention aims to solve the problem of pressure difference step at the meshing position of the backrest and the seat cushion, which affects the comfort of lying down riding, and thus provides a comfortable lying position adjustment mechanism for automobile seats with integrated backrest support, so as to reduce or even eliminate the pressure difference at the meshing position of the backrest and the seat cushion, thereby improving the comfort of lying down riding.

[0004] In order to solve the above problems, the present invention proposes a comfortable lying position adjustment mechanism for a car seat with integrated backrest support, including a backrest support structure and a lying position support adjustment structure. The backrest support structure and the lying position support adjustment structure share a main bracket on both sides, and the upper end of the main bracket is hung on the upper crossbeam of the seat frame through a hanging part. The backrest support structure connects the supporting steel wire between the main brackets on both sides of the backrest position. The lying position support adjustment structure includes a lower part of the main bracket and an EPP support block connected to the lower end of the main bracket; the main bracket is U-shaped at the meshing position of the seat cushion and the backrest, and the middle position of the U-shape is rotatably connected to the rotating support shaft, and the two ends of the rotating support shaft are fixedly connected to the two sides of the seat frame. When the car seat is adjusted to a lying position, the upper crossbeam of the seat frame drives the main brackets on both sides to rotate around the rotating support shaft, and the EPP support block is lifted upward as the main bracket rotates, pushing the seat cushion at the meshing position of the seat cushion and the backrest to be lifted.

[0005] Furthermore, the backrest support structure is a support steel wire connecting the main supports on both sides, including a thoracic support steel wire, a transition support steel wire and a lumbar support steel wire; the thoracic support steel wire is arranged on the upper part of the main support, and the middle part is curved in a wavy shape; the lumbar support steel wire is arranged on the main support near the lower part of the backrest; a transition support steel wire is provided between the main supports between the lumbar support steel wire and the thoracic support steel wire.

[0006] Furthermore, the waist support wire can be replaced by a waist support, and the waist support is fixedly connected to the main supports on both sides.

[0007] Furthermore, the cross section of the EPP support block is triangular, including three inclined surfaces, namely a first inclined surface, a second inclined surface and a third inclined surface, and the main bracket is connected at the intersection of the first inclined surface and the third inclined surface.

[0008] Furthermore, a sound-absorbing pad is provided at the lower portion of the third inclined surface of the EPP support block.

[0009] Furthermore, the main bracket is rotatably connected to the rotating support shaft through a bracket collar.

[0010] Furthermore, a rotation buffer pad is provided between the bracket collar and the rotation support shaft.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0012] (1) The present invention provides a comfortable reclining position adjustment mechanism for a car seat with an integrated backrest support, connecting a back support structure 1 and a reclining position support adjustment structure 2 through a main bracket. The main bracket adopts a U-shaped structure at the seat back engagement position. In a normal sitting position, the backrest support structure supports the back. In a reclining position, the main bracket drives the reclining position support adjustment structure 2 upward to support the buttocks and legs, thereby reducing or even eliminating the pressure difference at the engagement position between the seat cushion and the backrest, thereby achieving a comfortable reclining position.

[0013] (2) The main bracket is hung on the upper beam of the seat frame and rotates with the seat frame. It has a simple structure and is easy to install.

[0014] (3) The lumbar support is fixedly connected to the main supports on both sides. The main supports can increase or decrease the amount of micro-convexity at the waist according to the support strength requirements, thereby controlling the thickness of the foam at this position, so that the softness and hardness of the lumbar support and the stress state can better meet the requirements of riding comfort.

[0015] (4) The main support controls the foam thickness at the waist and shoulders separately by controlling the degree or angle of flexion, meeting the different requirements of the waist and shoulders for foam comfort, and can achieve a comfortable and flexible design of the waist and shoulder support strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a front view of the present invention;

[0018] Figure 3 It is a left side view of the present invention;

[0019] Figure 4 This is a schematic diagram of the present invention being installed on a seat frame;

[0020] Figure 5 It is a schematic diagram of the EPP support block structure;

[0021] Figure 6 It is a schematic diagram of the connection of the rotating support shaft 3;

[0022] Figure 7 This is a diagram showing the engagement position of the seat cushion and backrest when sitting;

[0023] Figure 8 This is a schematic diagram of the engagement position of the seat cushion and backrest in a lying position. DETAILED DESCRIPTION

[0024] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0025] Reference Figures 1 to 4 The comfortable reclining adjustment mechanism of the automobile seat with integrated backrest support of the present invention includes a backrest support structure 1 and a reclining support adjustment structure 2. The backrest support structure 1 and the reclining support adjustment structure 2 share a main bracket 101 on both sides. The upper end of the main bracket 101 is hung on the upper crossbeam of the seat frame 5 through a hanging part 4. The main bracket 101 is connected to the rotating support shaft 3 on the lower side of the backrest. The two ends of the rotating support shaft 3 are welded and fixed to the sheet metal parts on both sides of the seat frame 5. Compared with the traditional horizontal hanging: the bending shape of the main bracket 101 is freely designed, and it is designed according to the characteristics of the spine support to determine whether there is a lumbar support and the lumbar support stroke. Under the general trend of ultra-thin seat design, foam, as a medium to provide comfort and softness, will become thinner and thinner, which further highlights the importance of how the backrest support mechanism can effectively avoid perceived hard points.

[0026] The backrest support structure 1 is based on a stable main frame 101. Support wires connect the two main frames, including a thoracic support wire 102, a transition support wire 103, and a lumbar support wire 104. The thoracic support wire 102 is located above the main frame 101, away from the shoulder blades. Its central portion curves in a wave-like pattern. The height c of the wave's crest adjusts the amount of thoracic deformation. The lumbar support wire 104 is located near the lower portion of the main frame 101, with a transition support wire 103 located between the main frames 101 and 104. The distance b between the two main frames 101 adjusts the amount of deformation of the thoracic support wire 102, transition support wire 103, and lumbar support wire 104. When a passenger sits in the seat and leans against the seatback, the amount of back penetration and the strength of support (i.e., the strength of support) are determined by adjusting b and c. Increasing b and c allows the occupant's back to sink deeper into the seatback, increasing the contact area between the back and the seatback. This, within a certain range, improves comfort and provides reasonable support. b ranges from 150 to 300, and c ranges from 20 to 100.

[0027] The lumbar support wire can be replaced with a lumbar support. The lumbar support is fixedly connected to the main supports on both sides. The main supports can increase or decrease the lumbar protrusion according to the required support strength, thereby reducing or increasing the backrest foam thickness, so that the softness, hardness and stress state of the lumbar support better meet the requirements of riding comfort. From a comfort perspective, the lumbar and shoulder require different foam thicknesses. The main supports control the foam thickness of the lumbar and shoulder by controlling the degree or angle of forward flexion, meeting the different requirements of the lumbar and shoulder for foam comfort, and can achieve comfortable and flexible design of lumbar and shoulder support strength.

[0028] The reclining support adjustment structure 2 comprises the lower portion of the main support 101 and an EPP support block 201 connected to the lower end of the main support 101. The EPP support block 201 has a triangular cross-section and includes three inclined surfaces: a first inclined surface 2011, a second inclined surface 2012, and a third inclined surface 2013. The main support 101 is connected at the intersection of the first and third inclined surfaces 2011, 2013. During normal driving, the seat reclining support mechanism 2 is in its original position. The first inclined surface 2011 connecting the EPP support block 201 to the main support 101 provides auxiliary support, primarily for the seat cushion, which provides support for the body, and the backrest support structure 1, which provides support for the back. A sound-absorbing pad 202 is located below the third inclined surface 2013 of the EPP support block 201 to absorb noise during rotation, achieving a quieter effect.

[0029] Reference Figures 1 to 6The main bracket 101 is U-shaped at the engagement position of the seat cushion and the backrest. The middle position of the U-shape is mounted on the rotating support shaft 3 through the bracket ring 6. A rotating buffer pad 7 is provided between the bracket ring 6 and the rotating support shaft 3 to rotate slowly during rotation to prevent direct contact wear and noise during rotation.

[0030] Reference Figures 1 to 8 When the car seat is adjusted to a reclining position, the two main supports 101, shared by the backrest support structure 1 and the reclining support adjustment structure 2, rotate about the rotational support axis 3. The rotational force is driven by the crossbeam on the frame as the backrest is adjusted backward. As the occupant assumes a reclining position, the center of gravity gradually shifts to the back, reducing the weight acting on the seat cushion. The EPP support block 201 rotates and rises upward as the main support 101 rotates. The raised second inclined surface 2012 lifts the seat cushion at the seat-back interface 8, supporting the buttocks and upper thighs and preventing discomfort caused by prolonged leg suspension. The pressure difference between the seat cushion and the backrest interface gradually decreases, or even disappears, achieving a comfortable reclining position.

[0031] The angle between the first inclined surface 2011 of the EPP support block 201 and the horizontal plane is p. The width of the second inclined surface 2012 is n. The width of the connecting surface between the second inclined surface 2012 and the third inclined surface 2013 is m. Depending on the seat cushion angle, the EPP parameters m, n, and p are adjusted to achieve a proper match between reclining position adjustment and the seat cushion angle to achieve a comfortable reclining position. Increasing the value of m increases the lifting area. n and p control the strength and force of the lifting action and whether the EPP hardware is perceptible to the occupant while seated. Under normal circumstances, the EPP hard points are not perceptible. Designers need to adjust and test m, n, and p based on the foam hardness and design characteristics of different seats to achieve a reasonable parameter distribution. m ranges from 80 to 200, n ranges from 40 to 80, and p ranges from 15° to 60°.

Claims

1. A comfortable lying position adjustment mechanism for a car seat with integrated backrest support, characterized by: The invention comprises a backrest support structure (1) and a reclining support adjustment structure (2). The backrest support structure (1) and the reclining support adjustment structure (2) respectively share a main bracket (101) on both sides. The upper end of the main bracket (101) is hung on the upper crossbeam of the seat frame (5) through a hanging member (4). The backrest support structure (1) is a supporting wire connected between the main brackets on both sides of the backrest position. The reclining support adjustment structure (2) comprises a lower part of the main bracket (101) and an EPP support connected to the lower end of the main bracket (101). The support block (201) is U-shaped at the engagement position between the seat cushion and the backrest, the middle position of the U-shape is rotatably connected to the rotation support shaft (3), and the two ends of the rotation support shaft (3) are fixedly connected to the two sides of the seat frame (5). When the car seat is adjusted to a lying position, the upper crossbeam of the seat frame drives the main supports (101) on both sides to rotate around the rotation support shaft (3), and the EPP support block (201) is lifted upward along with the rotation of the main support (101), thereby pushing the seat cushion at the engagement position (8) between the seat cushion and the backrest to be lifted.

2. The comfortable lying position adjustment mechanism of a car seat with integrated backrest support according to claim 1, characterized in that: The backrest support structure (1) is a support steel wire connected between two main supports, including a thoracic support steel wire (102), a transition support steel wire (103) and a lumbar support steel wire (104); the thoracic support steel wire (102) is arranged on the upper part of the main support (101), and its middle part is curved in a wave shape; the lumbar support steel wire (104) is arranged on the main support (101) near the lower part of the backrest; and a transition support steel wire (103) is provided between the main supports between the lumbar support steel wire (104) and the thoracic support steel wire (102).

3. The comfortable lying position adjustment mechanism of a car seat with integrated backrest support according to claim 2, characterized in that: The waist support wire (104) is replaced by a waist support, which is fixedly connected to the main supports on both sides.

4. The comfortable lying position adjustment mechanism of a car seat with integrated backrest support according to claim 1, characterized in that: The EPP support block (201) has a triangular cross-section, comprising three inclined surfaces, namely a first inclined surface (2011), a second inclined surface (2012) and a third inclined surface (2013); the main support (101) is connected to the intersection of the first inclined surface (2011) and the third inclined surface (2013).

5. The comfortable lying position adjustment mechanism of a car seat with integrated backrest support according to claim 4, characterized in that: A sound-absorbing pad (202) is provided at the lower portion of the third inclined surface (2013) of the EPP support block (201).

6. The comfortable lying position adjustment mechanism of a car seat with integrated backrest support according to claim 1, characterized in that: The main bracket (101) is rotatably connected to the rotary support shaft (3) via a bracket collar (6).

7. The comfortable lying position adjustment mechanism of a car seat with integrated backrest support according to claim 6, characterized in that: A rotation buffer pad (7) is provided between the bracket collar (6) and the rotation support shaft (3).

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