Sheet metal part for a seat framework

Abstract

The utility model discloses a sheet metal part for seat framework, including first section, second section and first transition section, first transition section is connected in first section and second section, first section has the first thickness of uniformity, second section has the second thickness of uniformity, and second thickness is greater than first thickness, and first section, second section and first transition section are configured as integral molding piece. The utility model has solved the problem that the seat backrest side plate of the seat framework of existing car adopts two steel plates of different thicknesses and is welded, and the step caused by the sudden change of the thickness of material exists at the weld, and the seat backrest side plate is easy to deform when the car collides.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a sheet metal part for a seat frame and a seat frame. Background Technology

[0002] The seat back side panels and seat cushion side panels of a car seat frame are important components of a car seat. Taking the seat back side panel as an example, the area where it connects to the seat adjuster is a high-stress area, therefore, this area needs to be strengthened. Existing car seat frame seat back side panels (such as Chinese patent CN210047376U) are welded from steel plates of different thicknesses. At the laser weld joint of the two steel plates of the seat back side panel, due to the change in steel plate thickness, there is a significant step caused by a sudden change in material thickness. The step on the seat back side panel is a stress abrupt change point, which is prone to deformation or breakage and failure in the event of a car collision. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a sheet metal part for a seat frame and a seat frame are provided to solve the problem that the side panels of the seat back of existing car seat frames are welded from two steel plates of different thicknesses, resulting in a step caused by a sudden change in material thickness at the weld, which makes them prone to deformation in the event of a car collision.

[0004] To achieve the above objectives, a sheet metal part for a seat frame is provided, comprising a first section, a second section, and a first transition section, wherein the first transition section is connected to the first section and the second section, the first section has a uniform first thickness, the second section has a uniform second thickness, the second thickness being greater than the first thickness, and the first section, the second section, and the first transition section are constructed as an integrally formed part.

[0005] Furthermore, the load on the second section is greater than that on the first section.

[0006] Furthermore, the thickness of the first transition section gradually decreases from the side of the first transition section closer to the second section to the other side of the first transition section farther from the second section.

[0007] Furthermore, the length of the first transition section is greater than or equal to 100 times the difference between the first thickness and the second thickness.

[0008] Furthermore, the sheet metal part also includes a third section, which is connected to the first or second section via a second transition section, and the third section has a uniform third thickness; The first section, the second section, the third section, the first transition section, and the second transition section are constructed as a single integral part.

[0009] Furthermore, the third segment is connected to the first segment through the second transition segment, and the third thickness is greater than the first thickness.

[0010] Furthermore, the thickness of the second transition section gradually increases from the side of the second transition section closer to the first section to the other side of the second transition section farther from the first section.

[0011] Furthermore, the third segment is connected to the first segment through the second transition segment, and the third thickness is less than the first thickness.

[0012] Furthermore, the thickness of the second transition section gradually decreases from the side of the second transition section closer to the first section to the other side of the second transition section farther from the first section.

[0013] Furthermore, the sheet metal part is constructed as a seat back side panel, and the second section is constructed as an adjuster fitting area; or the sheet metal part is constructed as a seat cushion side panel, and the second section is constructed as a seat belt buckle fitting area.

[0014] Furthermore, the length of the second transition section is greater than or equal to 100 times the difference between the first and third thicknesses.

[0015] Furthermore, the third segment is connected to the second segment via the second transition segment, and the third thickness is less than the second thickness.

[0016] Furthermore, the thickness of the second transition section gradually decreases from the side of the second transition section closer to the second section to the side of the second transition section farther from the second section.

[0017] Furthermore, the third segment is connected to the second segment through the second transition segment, and the third thickness is greater than the second thickness.

[0018] Furthermore, the thickness of the second transition section gradually increases from the side of the second transition section closer to the second section to the side of the second transition section farther from the second section.

[0019] Furthermore, the length of the second transition section is greater than or equal to 100 times the difference between the second and third thicknesses.

[0020] Furthermore, the sheet metal components are constructed as seat back side panels and / or seat cushion side panels.

[0021] The beneficial effects of this utility model are that the sheet metal parts for the seat frame of this utility model, through a sheet metal design with gradually varying material thickness, achieve lean and lightweight construction of automotive seat frame parts, simplifying the part structure. The sheet metal parts for the seat frame of this utility model can be used in the design of complex parts such as seat back side panels and seat cushion side panels of automotive seat frames, allowing them to support the automotive seat frame as a single, integral part with a gradually varying thickness, eliminating the need for welding individual parts. This improves the impact resistance of the parts, reduces the weight of the frame, and saves on part costs.

[0022] The sheet metal part for the seat frame of this invention is integrally formed by rolling. The sheet metal part has a gradually thickened material and no weld seams, resulting in better stress strength and a better appearance. On the other hand, the preparation steps of the sheet metal part for the seat frame of this invention are fewer, the process is less, and one less set of molds is required, resulting in lower manufacturing costs. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the sheet metal part for the seat frame of this utility model in the seat back.

[0024] Figure 2 This is a schematic diagram showing the length proportions of each section of the sheet metal part used for the seat frame in the side panel of the seat back.

[0025] Figure 3 This is a schematic diagram of the sheet metal part for the seat frame of this utility model in the seat cushion.

[0026] Figure 4 This is a schematic diagram showing the length proportions of each section of the sheet metal part used for the seat frame in the seat cushion side panel of this utility model.

[0027] Figure 5 This is a schematic diagram of the sheet metal part structure for the seat frame in Embodiment 1 of this utility model.

[0028] Figure 6 This is a structural schematic diagram of the sheet metal part used for the seat frame in Embodiment 2 of this utility model.

[0029] Figure 7 This is a front view of the seat back side panel of Embodiment 2 of this utility model.

[0030] Figure 8 for Figure 7 A partial sectional view at point X in the diagram.

[0031] Figure 9This is a schematic diagram of the back of the seat back panel of Embodiment 2 of this utility model.

[0032] Figure 10 This is a schematic diagram showing the length proportions of the sheet metal parts for the seat frame in the side panel of the seat back, according to Embodiment 2 of this utility model.

[0033] Figure 11 This is a schematic diagram showing the thickness of the sheet metal parts for the seat frame in each section of the seat back side panel according to Embodiment 2 of this utility model.

[0034] Figure 12 This is a structural schematic diagram of the sheet metal part used for the seat frame in Embodiment 3 of this utility model.

[0035] Figure 13 This is a schematic diagram showing the thickness of the sheet metal parts for the seat frame in each section of the seat cushion side panel according to Embodiment 3 of this utility model.

[0036] Figure 14 This is a structural schematic diagram of the sheet metal part used for the seat frame in Embodiment 4 of this utility model.

[0037] Figure 15 for Figure 14 A partial sectional view at point Y in the diagram.

[0038] Figure 16 This is a schematic diagram showing the length proportions of the sheet metal parts for the seat frame in the side panel of the seat cushion according to Embodiment 4 of this utility model.

[0039] Figure label: Section 1, Section 2, Section 3, First Transition Section 4, Second Transition Section 5, Seat Backrest Side Panel A, Seat Cushion Side Panel B, Adjuster C, Upper Crossbeam D, Rear Tube E, Front Tube F, Linkage Bracket G. Detailed Implementation

[0040] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Reference Figures 1 to 4As shown, this utility model provides a sheet metal part for a seat frame, including a first section 1, a second section 2, and a first transition section 4. The first transition section 4 connects the first section 1 and the second section 2.

[0043] The first section 1 is a plate of uniform thickness. The first section 1 has a uniform first thickness T1.

[0044] The second section 2 is a sheet material of uniform thickness. The second section 2 has a uniform second thickness T2. The second thickness T2 is greater than the first thickness T1.

[0045] The first section 1, the second section 2, and the first transition section 4 are constructed as a single integral part. In this embodiment, the first section 1, the second section 2, and the first transition section 4 are integrally formed using a rolling process.

[0046] Specifically, the sheet metal parts for the seat frame of this utility model are made by hot forming rolling process or cold forming rolling process.

[0047] Hot forming rolling process includes steps such as thickening rolling, thickening straightening shearing, and blanking. Cold forming rolling process includes steps such as thickening rolling, annealing, electro-galvanizing, thickening straightening shearing, and blanking. Compared with cold forming rolling process, hot forming rolling process is a one-time rolling process, eliminating some intermediate steps of cold forming rolling process, which can achieve the goal of lightweight parts and reduce costs.

[0048] The load on the second section 2 is greater than that on the first section 1. Within the entire sheet metal part, the second section 2 corresponds to a higher stress area. Correspondingly, the torque on the second section 2 is 5850~7650 Nm, while the torque on the first section 1 is 2250~3150 Nm.

[0049] The thickness of the first transition section 4 gradually decreases from the side of the first transition section 4 closer to the second section 2 towards the side of the first transition section 4 farther from the second section 2. The first transition section 4 has two opposing inclined sides. The inclined sides connect the sides of the first section 1 and the second section 2, so that the sides of the first section 1 and the second section 2 transition smoothly without presenting obvious steps.

[0050] The length of the first transition section 4 is greater than or equal to 100 times the difference between the first thickness T1 and the second thickness T2.

[0051] Specifically, in combination Figure 2 and Figure 4 As shown, the length of the first transition section 4 shall not be less than 100 times the thickness difference a between the second thickness T2 of the second section 2 and the first thickness T1 of the first section 1, i.e., a≥|T1-T2|×100.

[0052] The sheet metal parts for seat frames of this utility model are applicable to parts such as the seat back side panel A and seat cushion side panel B of automobile seat frames.

[0053] This invention relates to a sheet metal part for a seat frame. Through a sheet metal design with gradually varying material thickness, it achieves lean and lightweight construction of automotive seat frame components, simplifying the component structure. This sheet metal part for a seat frame can be used in the design of complex components such as the seat back side panel AA and the seat cushion side panel B, allowing them to support the automotive seat frame as a single, integral, or separate component with a gradually varying thickness. This eliminates the need for welding individual parts, improving the component's impact resistance, reducing frame weight, and saving on component costs.

[0054] The sheet metal part for the seat frame of this invention is integrally formed by rolling. The sheet metal part has a gradually thickened material and no weld seams, resulting in good strength and a good appearance. On the other hand, the preparation steps of the sheet metal part for the seat frame of this invention are fewer, the processes are fewer, and one less set of molds is required, resulting in low manufacturing cost.

[0055] Generally, a car seat frame includes a backrest frame and a seat cushion frame.

[0056] The backrest frame includes two seat backrest side panels A arranged opposite each other. The seat backrest side panels A are vertically arranged. An upper crossbeam D connects the upper ends of the two seat backrest side panels A. An adjuster C connects the lower ends of the two seat backrest side panels A.

[0057] The seat cushion frame includes two seat cushion side panels B arranged opposite each other. The seat cushion side panels B are horizontally oriented. A front tube F connects the front ends of the two seat cushion side panels B. A rear tube E connects the rear ends of the two seat cushion side panels B.

[0058] See Figure 1 and Figure 2 As shown, the sheet metal part is structured as seat back side panel A, and the second section 2 is structured as the adjustment area of ​​the angle adjuster C.

[0059] See Figure 2 The length of the second section 2 of the seat back side panel A accounts for 20-30% of the total length L of the seat back side panel A; the length of the first transition section 4 of the seat back side panel A accounts for 5-10% of the total length L of the seat back side panel A; and the length of the first section 1 of the seat back side panel A accounts for 70-80% of the total length L of the seat back side panel A.

[0060] See Figure 3 and Figure 4 As shown, the sheet metal part is the seat cushion side panel B, and the second section 2 is the seat belt buckle adapter area.

[0061] See Figure 4 The left end of the seat cushion side panel B is connected to the backrest frame via the rear tube EE. The right ends of the two seat cushion side panels B are connected via the front tube F. The left end of the seat cushion side panel B is riveted to the connecting rod bracket G.

[0062] The second section 2 of the seat cushion side panel B accounts for 30-40% of the total length L of the seat cushion side panel B; the first transition section 4 of the seat cushion side panel B accounts for 5-10% of the total length L of the seat cushion side panel B; and the first section 1 of the seat cushion side panel B accounts for 60-70% of the total length L of the seat cushion side panel B. Correspondingly, a portion of the second section 2 of the seat cushion side panel B is designed as a flat surface of uniform thickness to facilitate the installation of the frame interface. A portion of the first section 1 of the seat cushion side panel B is designed as a flat surface of uniform thickness to facilitate the installation of the entire chair interface.

[0063] To further illustrate the practical application of the sheet metal parts for seat frames of this utility model in automobile seat frames, the following embodiments are provided for detailed explanation. Example 1

[0064] See Figure 5 As shown, this embodiment provides a sheet metal part for a seat frame, including a first section 1, a second section 2, and a first transition section 4. The first transition section 4 connects the first section 1 and the second section 2. The sheet metal part also includes a third section 3. The third section 3 is connected to the first section 1 via a second transition section 5.

[0065] The third section 3 is a plate of uniform thickness. The third section 3 has a uniform third thickness. The third thickness T3 of the third section 3 is greater than the first thickness T1 of the first section 1.

[0066] The first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are constructed as a single integral part. Correspondingly, the first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are integrally formed sheet metal parts, which can be manufactured using hot forming rolling or cold forming rolling processes.

[0067] The thickness of the second transition section 5 gradually increases from the side of the second transition section 5 closest to the first section 1 towards the other side of the second transition section 5 furthest from the first section 1.

[0068] The second transition section 5 has two opposing inclined sides. The inclined sides of the second transition section 5 connect the sides of the first section 1 and the third section 3, so that the sides of the first section 1 and the third section 3 transition smoothly without presenting obvious steps.

[0069] The length of the second transition section 5 is greater than or equal to 100 times the difference b1 between the first thickness T1 of the first section 1 and the third thickness T3 of the third section 3, i.e., b1≥|T1-T3|×100. Example 2

[0070] See Figures 6-11 This embodiment provides a sheet metal part for a seat frame, comprising a first section 1, a second section 2, and a first transition section 4. The first transition section 4 connects the first section 1 and the second section 2. The sheet metal part also includes a third section 3. The third section 3 is connected to the second section 2 via a second transition section 5.

[0071] The third section 3 is a plate of uniform thickness. The third section 3 has a uniform third thickness T3. The third thickness T3 of the third section 3 is less than the first thickness T1 of the first section 1.

[0072] The first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are constructed as a single integral part. Correspondingly, the first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are integrally formed sheet metal parts, which can be manufactured using hot forming rolling or cold forming rolling processes.

[0073] The thickness of the second transition section 5 gradually decreases from the side of the second transition section 5 closest to the first section 1 to the side of the second transition section 5 furthest from the first section 1.

[0074] The second transition section 5 has two opposing inclined sides. The inclined sides of the second transition section 5 connect the sides of the first section 1 and the third section 3, so that the sides of the first section 1 and the third section 3 transition smoothly without presenting obvious steps.

[0075] The length of the second transition section 5 is greater than or equal to 100 times the difference b2 between the first thickness T1 and the third thickness T3, i.e., b2≥|T2-T3|×100.

[0076] The sheet metal part is constructed as the seat back side panel A. The second section 2 of the sheet metal part is constructed as the adapter area for the adjuster C. The first section 1 of the sheet metal part is designed as a flat sheet of uniform thickness to facilitate the installation of the entire chair interface. The first transition section 4 and the second transition section 5 of the seat back side panel A can accommodate different material thicknesses and can be drilled.

[0077] The thickness of each section of the seat back side panel A gradually decreases from bottom to top. The lower end of the seat back side panel A and the adjuster C are connected by laser welding, and the upper end of the seat back side panel A is connected by arc welding to the upper back beam D.

[0078] See Figure 10As shown, the length of the second section 2 of the seat back side panel A accounts for 20-25% of the total length L of the seat back side panel A; the length of the first transition section 4 of the seat back side panel A accounts for 5-10% of the total length L of the seat back side panel A; the length of the first section 1 of the seat back side panel A accounts for 35-40% of the total length L of the seat back side panel A; the length of the second transition section 5 of the seat back side panel A accounts for 5-10% of the total length L of the seat back side panel A; and the length of the third section of the seat back side panel A accounts for 20-25% of the total length L of the seat back side panel A.

[0079] A portion of the first section 1 of the seat back side panel A is designed as a plane of uniform thickness, serving as a skeletal interface area for connection with components such as seatbelt exit brackets and shoulder support brackets. A portion of the third section 3 of the seat back side panel A is also designed as a plane of uniform thickness, serving as a skeletal interface area for connection with components such as airbags and wiring harnesses.

[0080] See Figure 11 As shown, in the strength test of the backrest frame and seat belt fixing point of the retractor installed on the car seat, the force applied by the seat belt is balanced. According to physics, work = force × displacement, the farther away from the seat belt exit point, the higher the strength requirement of the component. Therefore, this panel can adopt the design concept of "thin at the top and thick at the bottom". Specifically, the second thickness T2 of the second section 2 of the seat back side panel A is 1.8~3mm; the first thickness T1 of the first section 1 of the seat back side panel A is 1.1~2.2mm; and the third thickness T3 of the third section 3 of the seat back side panel A is 0.8~1.2mm.

[0081] This utility model discloses a novel sheet metal part for automotive seat frame design—a sheet metal part with gradually varying material thickness. This sheet metal part for seat frames utilizes dynamic rolling technology to roll a blank of uniform thickness into regularly spaced sheets of varying thicknesses, thus manufacturing a special part that meets the needs of automotive seat frames. The gradually varying material thickness sheet metal part offers the following design advantages: reduced seat weight, improved component integration, and enhanced performance. Example 3

[0082] See Figure 12 and Figure 13 As shown, this embodiment provides a sheet metal part for a seat frame, including a first section 1, a second section 2, and a first transition section 4. The first transition section 4 connects the first section 1 and the second section 2. The sheet metal part also includes a third section 3. The third section 3 is connected to the second section 2 via a second transition section 5. The third section 3 is a sheet metal of uniform thickness. The third section 3 has a uniform third thickness T3. The third thickness T3 of the third section 3 is less than the second thickness T2 of the second section 2.

[0083] The first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are constructed as a single integral part. Correspondingly, the first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are integrally formed sheet metal parts, which can be manufactured using hot forming rolling or cold forming rolling processes.

[0084] The thickness of the second transition section 5 gradually decreases from the side of the second transition section 5 closest to the second section 2 towards the side of the second transition section 5 furthest from the second section 2.

[0085] The second transition section 5 has two opposing inclined sides. The inclined sides of the second transition section 5 connect the sides of the second section 2 and the third section 3, so that the sides of the second section 2 and the third section 3 transition smoothly without presenting obvious steps.

[0086] The length of the second transition section 5 is greater than or equal to 100 times the difference b3 between the second thickness T2 of the second section 2 and the third thickness T3 of the third section 3, i.e., b3≥|T2-T3|×100.

[0087] In this embodiment, the sheet metal part is constructed as the seat cushion side panel B. The second section 2 of the sheet metal part is constructed as the seat belt buckle adapter area.

[0088] The left ends of the two seat cushion side panels B are connected to the backrest frame via the rear tube E. The right ends of the two seat cushion side panels B are connected via the front tube F. The left end of the seat cushion side panel B is riveted to the connecting rod bracket G. The thickness of the seat cushion side panel B generally increases from both ends towards the middle.

[0089] See Figure 13 The second section 2 of the seat cushion side panel B is the location of the seatbelt buckle / seated belt pretensioner / seated belt anchor point. In a collision scenario involving these areas, the occupant applies energy to the seat by pulling the seatbelt, and the first contact point of the frame requires the highest strength. The strength requirement decreases gradually with distance from the anchor point, thus a "thicker in the middle, thinner on the sides" design can be adopted. Specifically, the second thickness T2 of the second section 2 of the seat cushion side panel B is 1.6~2.2mm; the third thickness T3 of the third section 3 of the seat cushion side panel B is 0.8~1.6mm; and the first thickness T1 of the first section 1 of the seat cushion side panel B is 1.2~1.6mm. Example 4

[0090] See Figures 14 to 16This embodiment provides a sheet metal part for a seat frame, comprising a first segment 1, a second segment 2, and a first transition segment 4. The first transition segment 4 connects the first segment 1 and the second segment 2. The sheet metal part also includes a third segment 3. The third segment 3 is connected to the second segment 2 via a second transition segment 5. The third thickness T3 is greater than the second thickness T2.

[0091] The third section 3 is a plate of uniform thickness. The third section 3 has a uniform third thickness T3.

[0092] The first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are constructed as a single integral part. Correspondingly, the first section 1, the second section 2, the third section 3, the first transition section 4, and the second transition section 5 are integrally formed sheet metal parts, which can be manufactured using hot forming rolling or cold forming rolling processes.

[0093] The thickness of the second transition section 5 gradually increases from the side of the second transition section 5 closer to the second section 2 towards the other side of the second transition section 5 farther from the second section 2.

[0094] The second transition section 5 has two opposing inclined sides. The inclined sides of the second transition section 5 connect the sides of the second section 2 and the third section 3, so that the sides of the second section 2 and the third section 3 transition smoothly without presenting obvious steps.

[0095] The length of the second transition section 5 is greater than or equal to 100 times the difference b4 between the second thickness T2 and the third thickness T3, i.e., b4≥|T2-T3|×100.

[0096] In this embodiment, the sheet metal part is constructed as seat cushion side panel B. See reference... Figure 14 and Figure 16 As shown, the thickness of the seat cushion side panel B generally decreases from left to right.

[0097] Continue reading Figure 16 As shown, the length of the third section 3 of the seat cushion side panel B accounts for 25-30% of the total length L of the seat cushion side panel B; the length of the second transition section 5 of the seat cushion side panel B accounts for 5-10% of the total length L of the seat cushion side panel B; the length of the second section 2 of the seat cushion side panel B accounts for 20-25% of the total length L of the seat cushion side panel B; the length of the first transition section 4 of the seat cushion side panel B accounts for 5-10% of the total length L of the seat cushion side panel B; and the length of the first section 1 of the seat cushion side panel B accounts for 20-25% of the total length L of the seat cushion side panel B.

[0098] The third section 3 of the seat cushion side panel B is partially designed as a plane of uniform thickness, serving as the interface area for the frame connecting to components such as the rear tube E, the rear tube E connecting plate, and the seatbelt buckle bracket. The second section 2 of the seat cushion side panel B is partially designed as a plane of uniform thickness, serving as the first interface area for the entire seat connecting to components such as the armrest bracket and wiring harness. The first section 1 of the seat cushion side panel B is partially designed as a plane of uniform thickness, serving as the second interface area for the entire seat connecting to components such as the front tube F and the foam support wire.

[0099] This utility model discloses a novel sheet metal part for automotive seat frame design—a sheet metal part with gradually varying thickness. This sheet metal part for seat frames utilizes dynamic rolling technology to roll a blank of uniform thickness into regularly spaced sheets of varying thicknesses, thus manufacturing a special part that meets the needs of automotive seat frames. This sheet metal part for seat frames offers the following design advantages: reduced seat weight, improved component integration, and enhanced performance.

[0100] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A sheet metal part for a seat frame, characterized in that, It includes a first section (1), a second section (2) and a first transition section (4), the first transition section (4) being connected to the first section (1) and the second section (2), the first section (1) having a uniform first thickness, the second section (2) having a uniform second thickness, the second thickness being greater than the first thickness, and the first section (1), the second section (2) and the first transition section (4) being constructed as an integrally formed part.

2. The sheet metal part for a seat frame according to claim 1, characterized in that, The force load on the second section (2) is greater than the force load on the first section (1).

3. The sheet metal part for a seat frame according to claim 1, characterized in that, The thickness of the first transition section (4) gradually decreases from the side of the first transition section (4) closer to the second section (2) towards the other side of the first transition section (4) further away from the second section (2).

4. The sheet metal part for a seat frame according to claim 1, characterized in that, The length of the first transition section (4) is greater than or equal to 100 times the difference between the first thickness and the second thickness.

5. The sheet metal part for a seat frame according to claim 1, characterized in that, The sheet metal part further includes a third section (3), which is connected to the first section (1) or the second section (2) through a second transition section (5), and the third section (3) has a uniform third thickness; The first section (1), the second section (2), the third section (3), the first transition section (4), and the second transition section (5) are constructed as an integral molded part.

6. The sheet metal part for a seat frame according to claim 5, characterized in that, The third section (3) is connected to the first section (1) through the second transition section (5), and the third thickness is greater than the first thickness.

7. The sheet metal part for a seat frame according to claim 6, characterized in that, The thickness of the second transition section (5) gradually increases from the side of the second transition section (5) closer to the first section (1) to the other side of the second transition section (5) further away from the first section (1).

8. The sheet metal part for a seat frame according to claim 5, characterized in that, The third section (3) is connected to the first section (1) through the second transition section (5), and the third thickness is less than the first thickness.

9. The sheet metal part for a seat frame according to claim 8, characterized in that, The thickness of the second transition section (5) gradually decreases from the side of the second transition section (5) closer to the first section (1) to the other side of the second transition section (5) further away from the first section (1).

10. The sheet metal part for a seat frame according to claim 9, characterized in that, The sheet metal part is constructed as a seat back side panel (A), and the second section (2) is constructed as an adjuster adapter area; or the sheet metal part is constructed as a seat cushion side panel (B), and the second section (2) is constructed as a seat belt buckle adapter area.

11. The sheet metal part for a seat frame according to claim 5 or 7, characterized in that, The length of the second transition section (5) is greater than or equal to 100 times the difference between the first thickness and the third thickness.

12. The sheet metal part for a seat frame according to claim 5, characterized in that, The third section (3) is connected to the second section (2) through the second transition section (5), and the third thickness is less than the second thickness.

13. The sheet metal part for a seat frame according to claim 12, characterized in that, The thickness of the second transition section (5) gradually decreases from the side of the second transition section (5) closer to the second section (2) towards the other side of the second transition section (5) further away from the second section (2).

14. The sheet metal part for a seat frame according to claim 5, characterized in that, The third section (3) is connected to the second section (2) through the second transition section (5), and the third thickness is greater than the second thickness.

15. The sheet metal part for a seat frame according to claim 14, characterized in that, The thickness of the second transition section (5) gradually increases from the side of the second transition section (5) closer to the second section (2) towards the other side of the second transition section (5) further away from the second section (2).

16. The sheet metal part for a seat frame according to claim 10 or 12, characterized in that, The length of the second transition section (5) is greater than or equal to 100 times the difference between the second thickness and the third thickness.

17. The sheet metal part for a seat frame according to claim 1, characterized in that, The sheet metal part is constructed as a seat back side panel (A) or a seat cushion side panel (B).

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