Back seat hot-pressed felt anti-hollow structure and seat back

Abstract

The utility model discloses a kind of rear seat hot-pressing felt anti-hollow structure and seat backrest, and anti-hollow structure includes hot-pressing felt, metal backplate;The middle part of hot-pressing felt is equipped with inner concave surface, and the geometric characteristics of inner concave surface are as follows: transverse section curve satisfies ellipse equation;Vertical section curve satisfies ellipse equation;Transverse section curve, vertical section curve are taken from the part of lower end of ellipse major axis, and the symmetry axis of curve and the center of ellipse are on same horizontal reference line;Hot-pressing felt is assembled together with metal backplate, and metal backplate is flat backplate, and the structure compensates thermal deformation difference by double-ellipse inner concave geometry configuration, effectively prevent the occurrence of hollow phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat manufacturing technology, and in particular to a rear seat heat-pressed felt anti-cavitation structure and seat back. Background Technology

[0002] Existing seat backrests frequently exhibit hollow (bulging) issues at the interface between the hot-pressed felt layer and the metal frame, affecting seat performance (reduced structural stability) and user experience. For example, during vehicle manufacturing, gaps between the hot-pressed felt and the metal frame can lead to relative friction or vibration collisions, easily generating abnormal noises; furthermore, hollowness indirectly affects the force distribution during seating, reducing comfort. This is mainly caused by gas retention and material defects during the manufacturing process.

[0003] To address the issue of hollow areas (bulges), traditional solutions primarily involve optimizing hot-pressing processes, improving material handling, optimizing adhesive usage, employing auxiliary processes, improving equipment and molds, and strengthening quality control to reduce hollow areas in the third-row seats. While these methods are effective, they often require adjustments and optimizations based on specific circumstances, resulting in low efficiency, high costs, and difficulty in ensuring consistent quality. Summary of the Invention

[0004] To address the bulging problem at the interface between the hot-pressed felt layer and the metal skeleton in existing technologies, this invention improves the hot-pressed felt structure by employing a hot-pressed felt structure with an inwardly concave curved surface. During hot pressing, the center of the hot-pressed felt is concave, causing inward plastic deformation. After installation, it is pressed tightly against the metal backing plate and bent into a straight shape, creating a compressive force between the backing plate and the felt. This strengthens the bond between the backing plate and the felt, reduces the tendency of the hot-pressed felt to deform outward, greatly reduces the formation of voids, thereby reducing noise generation and optimizing structural strength.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rear seat heat-pressed felt anti-cavitation structure includes: heat-pressed felt and a metal back panel. The improvement is that the heat-pressed felt has a concave curved surface in the middle, and the geometric features of the concave curved surface are as follows:

[0007] The transverse cross-sectional curve satisfies the equation of an ellipse: And A1, B1, and c satisfy the formula Among them, the ranges of y1, A1, B1, c, and k1 are y≤0, k1≤A1≤3525, c≤B1≤A1, 10≤c≤20, and 200≤k1≤250, respectively.

[0008] The vertical cross-sectional curve satisfies the equation of an ellipse: And A2, B2, and c satisfy the formula Among them, the ranges of y2, A2, B2, c, and k2 are y≤0, k2≤A2≤5960, c≤B2≤A2, 10≤c≤20, and 275≤k2≤325, respectively.

[0009] In the formula, y1 and y2 are vertical coordinate variables, corresponding to the coordinates of the elliptic curve in the y direction; x1 and x2 are horizontal coordinate variables, corresponding to the coordinates of the elliptic curve in the x direction; A1 and A2 represent the major semi-axis of the ellipse; B1 and B2 represent the minor semi-axis of the ellipse; c is the parameter that constrains the minor semi-axis; and k1 and k2 are the lower limits of the major semi-axis.

[0010] The horizontal and vertical cross-sectional curves are taken from a portion of the lower end of the major axis of the ellipse, and the axis of symmetry of the curves is on the same horizontal reference line as the center of the ellipse.

[0011] The hot-pressed felt is assembled with a metal backing plate, and the overall structure of the metal backing plate is a flat backing plate.

[0012] As a preferred embodiment of this invention, the depth of the concave curved surface is (10~20) ± 0.3 mm.

[0013] As a preferred embodiment of this invention, the thickness of the central area of ​​the hot-pressed felt is greater than that of the edge area, with the central area of ​​the hot-pressed felt being 1-1.5 mm thicker than the edge area.

[0014] As a preferred embodiment of this utility model, the hot-pressed felt and the metal backing plate are assembled together by hot-pressing composite, mechanical fixing or adhesive bonding, wherein the mechanical fixing includes snap-fit.

[0015] As a preferred embodiment of this invention, the surface of the metal back plate is provided with reinforcing ribs and deformation induction grooves.

[0016] This utility model also provides a seat back, wherein the hot-pressed felt of the seat back is the aforementioned hot-pressed felt with an inwardly concave curved surface, and the hot-pressed felt is assembled together with a flat metal back panel, and the edge of the hot-pressed felt is fixed by a buckle on the flange of the metal back panel.

[0017] As a preferred embodiment of this utility model, the height of the seat back is 650~550mm and the width is 400~500mm.

[0018] Advantages and beneficial effects of this utility model:

[0019] (1) The hot-pressed felt in this utility model is prone to deformation after being subjected to external force. Increasing its thickness can enhance its resistance to deformation and breakage. The edge has a flange structure with sufficient strength. The reduction of the edge thickness can help the overall weight reduction. This structure can also make the pressure more evenly distributed to the entire contact surface, avoid excessive pressure on the edge and voiding of the center, and significantly improve the reliability of heat conduction.

[0020] (2) The anti-air drum structure provided by this utility model can ensure that the metal back plate and the hot-pressed felt can fit together precisely, eliminate unnecessary gaps, improve the stability and rigidity of the overall assembly, offset the high-frequency vibration during vehicle operation, and prevent friction noise caused by loosening between components.

[0021] (3) The present invention provides reinforcing ribs on the metal back plate, which can greatly increase the moment of inertia of the cross section, increase the back plate's resistance to vibration and bending, and withstand the compressive stress of the hot-pressed felt part for a long time.

[0022] (4) The present invention provides an induction groove on the metal back plate, which can release thermal stress and guide the deformation direction, thereby protecting fragile components such as welding points and connectors.

[0023] (5) The transverse and vertical cross-sectional curves of the hot-pressed felt of this utility model are taken from a part of the lower end of the major axis of the ellipse. The elliptical curve is differentiable throughout and has no abrupt change points, which can effectively solve the problem of hollowing and ensure the overall structural stability. However, if multi-end curve splicing is adopted (irregular curves seem to be expressed as multi-end regular curve splicing), under the action of multi-directional inertial forces in bumpy road conditions, the curvature at the splicing point of the multi-segment curves is discontinuous, which can easily form high stress in the local area, leading to local damage or failure of the felt to adhere, and the problem of hollowing will still occur. Moreover, long-term high stress may be transmitted to the metal backing plate, affecting the overall structural stability. Attached Figure Description

[0024] Other objectives and results will become clearer and easier to understand with reference to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the structure. In the accompanying drawings:

[0025] Figure 1 This is a front view of an application example of the hot-pressed felt anti-cavitation structure for the rear seats of this utility model;

[0026] Figure 2 yes Figure 1 A cross-sectional view along the AA direction;

[0027] Figure 3 yes Figure 1 A sectional view along the BB direction;

[0028] Figure 4 This is a schematic diagram of the metal backplate structure;

[0029] The reference numerals in the attached drawings include: 1. Hot-pressed felt; 2. Metal back panel; 3. Seat cover; 4. Comfort sponge; 5. Fabric; 6. Supporting sponge; 7. Seat frame reinforcing tube; 8. Seat back connecting beam; 9. Seat back transverse connecting tube; 1-1. Concave curved surface; 2-1. Reinforcing rib; 2-2. Deformation induction groove. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] like Figures 1 to 3 This utility model provides a rear seat heat-pressed felt anti-cavitation structure, including heat-pressed felt 1 and metal back panel 2; wherein, the heat-pressed felt 2 has a concave curved surface 1-1 in the middle, and the geometric features of the concave curved surface 1-1 are as follows:

[0033] The transverse cross-sectional curve satisfies the equation of an ellipse: And A1, B1, and c satisfy the formula Among them, the ranges of y1, A1, B1, c, and k1 are y≤0, k1≤A1≤3525, c≤B1≤A1, 10≤c≤20, and 200≤k1≤250, respectively.

[0034] The vertical cross-sectional curve satisfies the equation of an ellipse: And A2, B2, and c satisfy the formula Among them, the ranges of y2, A2, B2, c, and k2 are y≤0, k2≤A2≤5960, c≤B2≤A2, 10≤c≤20, and 275≤k2≤325, respectively.

[0035] In the formula, y1 and y2 are vertical coordinate variables, corresponding to the coordinates of the elliptic curve in the y direction; x1 and x2 are horizontal coordinate variables, corresponding to the coordinates of the elliptic curve in the x direction; A1 and A2 represent the major semi-axis of the ellipse; B1 and B2 represent the minor semi-axis of the ellipse; c is the parameter that constrains the minor semi-axis; and k1 and k2 are the lower limits of the major semi-axis.

[0036] The horizontal and vertical cross-sectional curves are taken from a portion of the lower end of the major axis of the ellipse, and the axis of symmetry of the curves is on the same horizontal reference line as the center of the ellipse.

[0037] The hot-pressed felt and the metal backing plate are assembled together by hot-pressing composite, mechanical fixing or adhesive bonding. The mechanical fixing includes snap-fit. The overall structure of the metal backing plate is a flat backing plate.

[0038] In this embodiment, the provided solution is applicable to seats with a height of 650~550mm and a width of 400~500mm.

[0039] Furthermore, in this embodiment, the depth of the concave surface is (10~20) ±0.3mm.

[0040] Furthermore, in this embodiment, the thickness of the central area of ​​the hot-pressed felt 21 is greater than that of the edge area; specifically, the central area is about 1 mm thicker than the edge area.

[0041] Furthermore, such as Figure 4 As shown, in this embodiment, the metal back plate 2 is a cold-rolled steel plate with X-shaped reinforcing ribs 2-1 and deformation induction grooves 2-2 on its surface.

[0042] This embodiment also provides a seat back, which includes a heat-pressed felt 1, a metal back panel 2, a seat cover 3, a comfort sponge 4, a fabric 5, a support sponge 6, a seat frame reinforcing tube 7, a seat-back connecting beam 8, and a seat back transverse connecting tube 9. The specific connection of each component of the backrest can refer to the prior art, which is not an improvement of this application. The key of this application is to improve the structure of the heat-pressed felt 1, that is: the heat-pressed felt 1 adopts the above-mentioned heat-pressed felt 1 with an inner concave curved surface 1-1 structure.

[0043] Working principle:

[0044] During installation: The concave curved surface of the hot-pressed felt 1 deforms, creating a squeezing force between it and the metal backing plate 2, resulting in a tight fit and reducing the tendency of the felt to deform outward. The edges are fixed by the buckles on the metal backing plate, which can prevent fatigue and detachment during long-term use.

[0045] During operation: When the ambient temperature rises, the compressive stress in the middle of the hot-pressed felt increases and concentrates. Due to the prestress given to it during manufacturing to bend inward, the deformation direction is guided by the prestress to the direction of the metal backing plate, making the bond between it and the metal backing plate tighter and reducing the occurrence of voids.

[0046] When the ambient temperature decreases, some of the prestress in the middle of the hot-pressed felt is offset by tensile stress, but some prestress is still used for the bonding between the hot-pressed felt and the metal back panel, and the contact between the two remains tight. This anti-hollow structure compensates for the difference in thermal deformation through the double-elliptical concave geometry on the hot-pressed felt, effectively preventing the occurrence of hollow phenomena, thereby reducing noise generation and optimizing the structural strength. This solution can ensure the consistency of seat quality, is highly efficient, and greatly reduces production costs.

[0047] The above describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A rear seat heat-pressed felt anti-cavitation structure, comprising: A hot-pressed felt and a metal backing plate, characterized in that the hot-pressed felt has a concave curved surface in the middle, and the geometric features of the concave curved surface are as follows: The transverse cross-sectional curve satisfies the equation of an ellipse: And A1, B1, and c satisfy the formula Among them, the ranges of y1, A1, B1, c, and k1 are y≤0, k1≤A1≤3525, c≤B1≤A1, 10≤c≤20, and 200≤k1≤250, respectively. The vertical cross-sectional curve satisfies the equation of an ellipse: And A2, B2, and c satisfy the formula Among them, the ranges of y2, A2, B2, c, and k2 are y≤0, k2≤A2≤5960, c≤B2≤A2, 10≤c≤20, and 275≤k2≤325, respectively. In the formula, y1 and y2 are vertical coordinate variables, corresponding to the coordinates of the elliptic curve in the y direction; x1 and x2 are horizontal coordinate variables, corresponding to the coordinates of the elliptic curve in the x direction; A1 and A2 represent the major semi-axis of the ellipse; B1 and B2 represent the minor semi-axis of the ellipse; c is the parameter that constrains the minor semi-axis; and k1 and k2 are the lower limits of the major semi-axis. The horizontal and vertical cross-sectional curves are taken from a portion of the lower end of the major axis of the ellipse, and the axis of symmetry of the curves is on the same horizontal reference line as the center of the ellipse. The hot-pressed felt is assembled with a metal backing plate, and the overall structure of the metal backing plate is a flat backing plate.

2. The rear seat heat-pressed felt anti-cavitation structure according to claim 1, characterized in that, The depth of the concave surface is (10~20) ±0.3mm.

3. A rear seat heat-pressed felt anti-cavitation structure according to claim 1 or 2, characterized in that, The thickness of the central area of ​​the hot-pressed felt is greater than that of the edge area, with the central area being 1-1.5 mm thicker than the edge area.

4. A rear seat heat-pressed felt anti-cavitation structure according to claim 1 or 2, characterized in that, The hot-pressed felt and the metal backing plate are assembled together by hot-pressing composite, mechanical fixing or adhesive bonding, wherein the mechanical fixing includes snap-fit.

5. A rear seat heat-pressed felt anti-cavitation structure according to claim 1 or 2, characterized in that, The surface of the metal back plate is provided with reinforcing ribs and deformation induction grooves.

6. A seat backrest, characterized in that, The hot-pressed felt of the seat back adopts the anti-cavitation structure of the hot-pressed felt of the rear seat as described in claim 1 or 2. The hot-pressed felt is assembled with a flat metal back panel, and the edge of the hot-pressed felt is fixed by the buckle on the flange of the metal back panel.

7. A seat backrest according to claim 6, characterized in that, The seat backrest is 650-550mm high and 400-500mm wide.

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