Design method of engineering feasible section system supporting seat modeling

Abstract

This invention provides a design method for an engineering-feasible cross-sectional system supporting seat styling. The cross-sectional system designed by this method consists of a seat-back center cross-section and a seat-back transverse cross-section. The seat-back center cross-section is given based on seat comfort requirements, while the seat-back transverse cross-section is given based on engineering manufacturing feasibility. This cross-sectional system basically constrains the overall dimensional outline of the seat, ensuring engineering feasibility and providing a fundamental guarantee for the manufacture of subsequent seat parts. When the seat styling is creatively developed and reflects the seat's styling characteristics using this cross-sectional system as a boundary, the cross-sectional system can constrain the styling surface, reducing the number of repeated checks and updates between stylists and engineers, greatly improving the feasibility and efficiency of seat styling, and reducing ineffective styling. It can be applied to all seat development projects, not only ensuring the feasibility of seat styling but also improving efficiency and reducing labor costs.

Description

Technical Field

[0001] This invention relates to the field of automotive seats, and more specifically to a design method for an engineering-feasible cross-sectional system that supports seat styling. Background Technology

[0002] The comfort of a car seat largely depends on its design. An excellent seat design not only provides an aesthetic experience but also meets the user's seating needs, ensuring good comfort for passengers in various driving conditions.

[0003] The design of car seats involves multiple aspects, including ergonomics, aesthetics, structure, manufacturing processes, and safety. These aspects are interdependent and indispensable. For a newly developed seat project, the stylist typically designs the seat shape first. Then, the engineer verifies the feasibility based on the seat frame and dummy posture. After verification, the stylist provides feedback to the stylist, who then makes the modifications and provides feedback to the engineer. The engineer continues to verify the feasibility, which usually requires ten or even twenty rounds of communication. This results in a long time required to finalize the seat design data, directly affecting the development progress of the seat project. Summary of the Invention

[0004] The purpose of this invention is to provide a design method for an engineering-feasible cross-sectional system that supports seat design. The cross-sectional system designed by this method basically constrains the overall size and outline of the seat. When designing the seat, creative ideas are made based on this cross-sectional system and the seat design features are reflected. This can greatly improve the feasibility and efficiency of seat design, reduce the number of times the stylist and engineer have to repeatedly check and update, reduce invalid designs, and ensure the feasibility of seat design.

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

[0006] A design method for an engineering-feasible section system that supports seat styling includes the following steps:

[0007] (1) Create a seat center section in CATIA software. The seat center section includes the seat cushion center section, the backrest center section and the headrest center section. When drawing the seat cushion center section, determine a point on the center line below the artificial buttocks based on the position of the seat cushion curtain of the seat frame and the artificial buttocks pressing ratio. Then determine the trend of the seat cushion center section based on the seat cushion tilt angle and the seat cushion exit point. Determine the front boundary of the seat cushion center section based on the seat cushion length and the distance between the front edge of the seat cushion and the seat frame. Thus, determine the seat cushion center section.

[0008] When drawing the center section of the backrest, the boundary of the front center section of the backrest is determined by the position of the backrest curtain and the dummy backrest pressing ratio. Then, the front center section of the backrest is determined by the lumbar protrusion point, the distance of the highest point of the lumbar from the torso line, the backrest departure point, and the distance between the upper end of the front center section of the backrest and the frame. A gap of more than 25mm needs to be left between the back center section of the backrest and the controller and fan on the seat back. This gap is used to determine the boundary of the back center section of the backrest.

[0009] When drawing the center section of the headrest, the front surface of the headrest should be inclined at an angle of less than 5 degrees to the vertical line based on the headrest Backset value, thus determining the front boundary of the headrest; the upper and lower boundaries of the headrest are determined based on the following: the highest position of the headrest should not be less than 800mm, the gap between the headrest and the center section of the seat back should be less than 20mm at the lowest position, and the height of the pillow part should be greater than 100mm to accommodate the internal structure of the headrest; the rear boundary of the headrest should be consistent with the boundary of the center section of the backrest.

[0010] (2) Create a seat back lateral section in CATIA software. The seat back lateral section includes a backrest lateral section, a seat cushion lateral section, and a headrest lateral section. The backrest lateral section includes a first backrest lateral section, a second backrest lateral section, and a third backrest lateral section spaced apart. The first backrest lateral section, the second backrest lateral section, and the third backrest lateral section must not exceed the inner limit surface of the seat. The distance from the side airbag and the distance from the distal airbag must be controlled to be greater than 18mm. This determines the width boundary dimensions of the first backrest lateral section, the second backrest lateral section, and the third backrest lateral section. The first backrest lateral section is determined based on the backrest core width requirements required for seat comfort. The core widths of the first, second, and third cross sections are used to determine the core boundary positions of surface A of the first, second, and third cross sections. Then, based on the width boundary dimensions of the first, second, and third cross sections, side wing arcs are drawn between the core boundary position and the width boundary of surface A. When drawing the side wing arcs, the side wing arcs on both sides of surface A of the first, second, and third cross sections are drawn according to the requirement that the side wings do not interfere with the dummy backrest. The thickness of the first, second, and third cross sections is determined by the thickness between the front center section and the back center section of the backrest.

[0011] The transverse cross-section of the seat cushion includes four cross-sections: the first, second, third, and fourth cross-sections, which are spaced apart. The first, second, third, and fourth cross-sections must not exceed the inner limit surface of the seat. The core width of the first, second, third, and fourth cross-sections (A-side) is determined based on the seat cushion core width requirements for seat comfort. The width boundaries of the first, second, third, and fourth cross-sections are determined based on a distance of greater than or equal to 23mm between the first, second, third, and fourth cross-sections and the seat frame. The side wing arcs on both sides of the first, second, third, and fourth cross-sections (A-side) are drawn according to the requirement that the side wing arcs of the seat do not interfere with the dummy, thereby determining the transverse cross-section of the seat cushion.

[0012] When drawing the cross-section of the headrest, first ensure that the distance from both sides of the headrest to the vertical center plane of the seat is not less than 85mm, which is the regulatory requirement of a minimum headrest width of 170mm. Secondly, the distance between the lateral boundary and the internal structure of the headrest is greater than 18mm. This is how the boundary of the headrest cross-section is determined.

[0013] (3) Based on the above boundary constraints and quantitative parameters, determine the seat center section and the seat transverse section. Interweave the seat center section and the seat transverse section to form the seat section system. The seat section system is used to constrain the shape surface. When shaping the seat, use this section system as the boundary for creative design.

[0014] Advantages and beneficial effects of the present invention:

[0015] The seat cross-sectional system designed in this invention consists of a seat center cross-section and a seat transverse cross-section. The seat center cross-section is provided based on seat comfort requirements, while the seat transverse cross-section is provided based on engineering manufacturing feasibility. It mainly includes the minimum dimensional space necessary for the manufacturing and normal operation of parts such as the frame, foam, plastic parts, and airbags. This cross-sectional system basically constrains the overall dimensional outline of the seat, ensuring engineering feasibility and providing a fundamental guarantee for the subsequent manufacture of seat parts. When the seat design is based on this cross-sectional system to create and reflect the seat's styling characteristics, the cross-sectional system can constrain the styling surface, reducing the number of repeated checks and updates between stylists and engineers. This can greatly improve the feasibility and efficiency of seat styling and reduce ineffective styling. It can be applied to all seat development projects, not only ensuring the feasibility of seat styling but also improving efficiency and reducing labor costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the cross-section near the center;

[0018] Figure 2 A schematic diagram of the cross-section of the seat;

[0019] Figure 3 A schematic diagram of an engineering feasible section system to support the seat design;

[0020] Figure 4 This is a schematic diagram of the seat surface design;

[0021] Figure 5 Schematic diagram showing the determination of the center section and boundary of the backrest;

[0022] Figure 6 Schematic diagram showing the determination of the center section and boundary of the seat cushion;

[0023] Figure 7 Schematic diagram showing the determination of the transverse cross-section and boundary of the backrest;

[0024] Figure 8 Schematic diagram showing the determination of the transverse cross-section and boundary of the seat cushion. Detailed Implementation

[0025] 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.

[0026] In the description of this application, it should be noted that the terms "upper," "front," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] like Figures 1 to 3As shown, the present invention provides a design method for an engineering-feasible section system supporting seat styling, comprising the following steps:

[0028] (1) Create a seat center section in CATIA software. The seat center section includes seat cushion center section 1, backrest center section 2 and headrest center section 3. When drawing the seat cushion center section, determine a point on the center line below the artificial buttocks based on the position of the seat cushion curtain of the seat frame and the artificial buttocks pressing ratio. Then determine the trend of the seat cushion center section based on the seat cushion tilt angle and the seat cushion exit point. Determine the front boundary of the seat cushion center section based on the seat cushion length and the distance between the front edge of the seat cushion and the seat frame. Thus, determine the seat cushion center section.

[0029] When drawing the center section of the backrest, the boundary of the front center section 21 of the backrest is determined by the position of the backrest curtain (support board) and the false backrest pressing ratio. The center line of the false backrest is determined by the lumbar protrusion point, the distance of the highest point of the lumbar from the torso line, the backrest departure point, and the distance between the upper end of the front center section of the backrest and the frame. A gap needs to be left between the back center section 22 of the backrest and the controller and fan on the seat back. This gap should be greater than 25mm to prevent the back panel from falling off under extreme working conditions. The boundary of the back center section of the backrest is determined by this.

[0030] When drawing the center section of the headrest, the front boundary of the headrest is determined by using a headrest backset value of 35-45mm and ensuring that the front surface of the headrest forms an angle of less than 5 degrees with the vertical line. The upper and lower boundaries of the headrest are determined by ensuring that the highest position of the headrest is not less than 800mm, the gap between the headrest and the center section of the seat back is less than 20mm at the lowest position, and that the height of the headrest portion is greater than 100mm and can accommodate the internal structure of the headrest. The rear boundary of the headrest is consistent with the boundary of the center section of the backrest.

[0031] (2) Create a seat back transverse section in CATIA software. The seat back transverse section includes a backrest transverse section 4, a seat cushion transverse section 5, and a headrest transverse section 6. The backrest transverse section 4 includes a first backrest transverse section 41, a second backrest transverse section 42, and a third backrest transverse section 43 spaced apart. The first backrest transverse section 41, the second backrest transverse section 42, and the third backrest transverse section 43 must not exceed the inner limit surface of the seat, and the distance from the side airbag and the distance from the distal airbag must be greater than or equal to 18mm. This determines the width boundary dimensions of the first backrest transverse section, the second backrest transverse section, and the third backrest transverse section. The required backrest core width (280-2) is determined based on the seat comfort requirements. The core widths of the first, second, and third cross sections are determined by measuring 95mm, thereby determining the core boundary positions of the first, second, and third cross sections A. Then, based on the width boundary dimensions of the first, second, and third cross sections, side wing arcs are drawn between the core boundary position and the width boundary of the A section. When drawing the side wing arcs, the side wing arcs on both sides of the first, second, and third cross sections A are drawn according to the requirement that the side wings do not interfere with the dummy backrest. The thickness of the first, second, and third cross sections is determined by the thickness between the front center section 21 and the back center section 22 of the backrest.

[0032] The seat cushion transverse section 5 includes a first seat cross section 51, a second seat cross section 52, a third seat cross section 53, and a fourth seat cross section 54 spaced apart. The first seat cross section 51, the second seat cross section 52, the third seat cross section 53, and the fourth seat cross section 54 must not exceed the inner limit surface of the seat (the limit is 0; otherwise, there is a risk of movement interference between the seat and the sub-dashboard). The first and second seat cross sections are determined by the required seat cushion core width (310-330mm) for seat comfort. The core width of the third and fourth cross sections A is determined by defining the width boundaries of the first, second, third, and fourth cross sections based on a distance of greater than or equal to 23mm between the first, second, third, and fourth cross sections and the seat frame. The side wing arcs of the first, second, third, and fourth cross sections A are drawn according to the requirement that the side wing arcs of the seats do not interfere with the dummy, thereby determining the transverse cross section of the seat cushion.

[0033] When drawing the headrest cross section 6, first ensure that the distance from both sides of the headrest to the vertical center plane of the seat is not less than 85mm, which is the regulatory requirement of a minimum headrest width of 170mm. Secondly, the distance between the lateral boundary and the internal structure of the headrest (such as speakers and adjustment mechanisms) is greater than 12mm (in this example, the headrest is a plastic shell with a covering structure). The boundary of the headrest cross section is determined in this way.

[0034] (3) Based on the above boundary constraints and quantification parameters, the center section and transverse section of the seat back are determined. The center section and transverse section are interwoven to form the seat section system. The seat section system is used to constrain the styling surface. The seat styling is based on this section system as the boundary for creative design. The results are shown in […]. Figure 4 .

[0035] The results of determining the center section and boundary of the backrest drawn according to the parameter requirements in Table 1 are shown below. Figure 5 .

[0036] Table 1. Cross-sectional boundary of the backrest center section

[0037] The results of determining the center section and boundary of the seat cushion according to the parameter requirements in Table 2 are shown below. Figure 6 .

[0038] Table 2. Cross-sectional boundary of the seat cushion center section

[0039]

[0040] The results of determining the transverse cross-section and boundary of the backrest drawn according to the above requirements are shown in Table 3. Figure 7 .

[0041] Table 3. Transverse Cross-sectional Boundaries of Backrest

[0042] Dimensions and technical parameters actual value Target value Relying on the cross section and side airbags 18.4mm; 22.2mm ≥18mm Relying on the cross-section and distal airbag 19.7mm; 18mm ≥18mm Relying on the cross-section and the inner side of the seat to restrict the surface 0mm ≥0mm Relying on the cross-section and pneumatic system (fan and controller). 26.8mm; 26.9mm >25mm

[0043] The results of determining the transverse cross-section and boundary of the seat cushion as required by the present invention are shown in Table 4. Figure 8 .

[0044] Table 4. Transverse Cross-sectional Boundaries of Seat Cushions

[0045] Dimensions and technical parameters actual value Target value Cross section of seat and frame of seat 29mm; 23.4mm ≥23mm Cross section of seat and frame of seat 27.9mm; 22.6mm ≥23mm Seat cross section and seat inner limiting surface 6.7mm; 1.6mm ≥0mm

[0046] The above describes specific embodiments of the present invention, but the scope of protection of the present invention 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 the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A design method for an engineering-feasible section system supporting seat styling, comprising the following steps: (1) Create a seat center section in CATIA software. The seat center section includes the seat cushion center section, the backrest center section and the headrest center section. When drawing the seat cushion center section, determine a point on the center line below the artificial buttocks based on the position of the seat cushion curtain of the seat frame and the artificial buttocks pressing ratio. Then determine the trend of the seat cushion center section based on the seat cushion tilt angle and the seat cushion exit point. Determine the front boundary of the seat cushion center section based on the seat cushion length and the distance between the front edge of the seat cushion and the seat frame. Thus, determine the seat cushion center section. When drawing the center section of the backrest, the boundary of the front center section of the backrest is determined by the position of the backrest curtain and the dummy backrest pressing ratio, which is a point on the center line of the dummy backrest. The front center section of the backrest is then determined by the lumbar protrusion point, the distance of the highest point of the lumbar from the torso line, the backrest departure point, and the distance between the upper end of the center section of the backrest and the frame. A gap of more than 25mm needs to be left between the center section of the backrest and the controller and fan on the seat back. This gap is used to determine the boundary of the center section of the backrest. When drawing the center section of the headrest, the front surface of the headrest should be inclined at an angle of less than 5 degrees to the vertical line based on the headrest Backset value, thus determining the front boundary of the headrest; the upper and lower boundaries of the headrest are determined based on the following: the highest position of the headrest should not be less than 800mm, the gap between the headrest and the center section of the seat back should be less than 20mm at the lowest position, and the height of the pillow part should be greater than 100mm to accommodate the internal structure of the headrest; the rear boundary of the headrest should be consistent with the boundary of the center section of the backrest. (2) Create a seat back lateral section in CATIA software. The seat back lateral section includes a backrest lateral section, a seat cushion lateral section, and a headrest lateral section. The backrest lateral section includes a first backrest lateral section, a second backrest lateral section, and a third backrest lateral section spaced apart. The first backrest lateral section, the second backrest lateral section, and the third backrest lateral section must not exceed the inner limit surface of the seat. The distance from the side airbag and the distance from the distal airbag must be controlled to be greater than 18mm. This determines the width boundary dimensions of the first backrest lateral section, the second backrest lateral section, and the third backrest lateral section. The first backrest lateral section is determined based on the backrest core width requirements required for seat comfort. The core widths of the first, second, and third cross sections are used to determine the core boundary positions of surface A of the first, second, and third cross sections. Then, based on the width boundary dimensions of the first, second, and third cross sections, side wing arcs are drawn between the core boundary position and the width boundary of surface A. When drawing the side wing arcs, the side wing arcs on both sides of surface A of the first, second, and third cross sections are drawn according to the requirement that the side wings do not interfere with the dummy backrest. The thickness of the first, second, and third cross sections is determined by the thickness between the front center section and the back center section of the backrest. The transverse cross-section of the seat cushion includes four cross-sections: the first, second, third, and fourth cross-sections, which are spaced apart. The first, second, third, and fourth cross-sections must not exceed the inner limit surface of the seat. The core width of the first, second, third, and fourth cross-sections (A-side) is determined based on the seat cushion core width requirements for seat comfort. The width boundaries of the first, second, third, and fourth cross-sections are determined based on a distance of greater than or equal to 23mm between the first, second, third, and fourth cross-sections and the seat frame. The side wing arcs on both sides of the first, second, third, and fourth cross-sections (A-side) are drawn according to the requirement that the side wing arcs of the seat do not interfere with the dummy, thereby determining the transverse cross-section of the seat cushion. When drawing the cross-section of the headrest, first ensure that the distance from both sides of the headrest to the vertical center plane of the seat is not less than 85mm, which is the regulatory requirement of a minimum headrest width of 170mm. Secondly, the distance between the lateral boundary and the internal structure of the headrest is greater than 18mm. This is how the boundary of the headrest cross-section is determined. (3) Based on the above boundary constraints and quantitative parameters, determine the seat center section and the seat transverse section. Interweave the seat center section and the seat transverse section to form the seat section system. The seat section system is used to constrain the shape surface. When shaping the seat, use this section system as the boundary for creative design.

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