A design method of front windshield ceramic sunshade band based on V point

Abstract

The application relates to a V-point-based front windshield ceramic sunshade strip design method, which takes a driver V1 visual point, a sun visor in a vertical state, an inside rearview mirror and a front windshield ceramic strip printing surface as input conditions; curves C2, C4, C5, C6, C7, C8 and C9 are sequentially obtained, curves C2, C8 and C9 are respectively trimmed, and R2 and R3 are combined, so that the front windshield ceramic sunshade strip is obtained. The method can realize quantification of a sunshade strip area; the method is based on the visual point V1, matches the actual use conditions of the inside rearview mirror and the sun visor, makes the minimum area of the ceramic sunshade strip in a three-dimensional CAD software, ensures that light cannot enter the human eye from the middle area of the sun visor during light driving of the vehicle, guarantees driving safety, and simultaneously considers the aesthetic property; the method is based on the visual point V1 of the driver and meets the light-shading requirements of most people from the human-machine engineering angle.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically relating to a design method for a V-point-based ceramic sunshade for the windshield, applicable to all passenger vehicles. Background Technology

[0002] In the top area of ​​the car windshield, in the center of the sun visor, a ceramic sunshade strip is typically printed on the glass. This ceramic sunshade strip is usually dotted, mesh-like, or even completely black. For situations where cameras or other accessories require viewing windows on the glass, a separate transparent area can be created within the ceramic sunshade strip, as shown below. Figure 1 As shown. Its purpose is to fill the gap in the middle of the sun visors for the driver and passenger sides, preventing light from entering the driver's eyes through the middle area when the vehicle is driving towards the sun, thus ensuring driving safety. However, since there is no quantifiable design method for the sunshade's effectiveness in this area, ceramic sunshades are generally designed by professionals based on aesthetic requirements. The resulting sunshades are not very effective at blocking light, thus affecting the driving experience.

[0003] Currently, the design of ceramic sun visors is generally determined by the styling department, prioritizing minimization and considering their proportion of the windshield to achieve an aesthetically pleasing solution. Furthermore, with the increasing functionality of vehicles, many electrical components are integrated into the rearview mirror mounting area, necessitating a protective cover. Ceramic sun visors thus provide some sun protection. However, many lower-spec models lack such covers and therefore do not have ceramic sun visors, failing to meet sun protection requirements. Therefore, a new design method for front windshield ceramic sun visors needs to be developed. Summary of the Invention

[0004] The purpose of this invention is to provide an engineering-quantifiable design method for a V-point-based ceramic sunshade for the windshield, in order to solve the problem of easily designing the smallest sunshade area.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A design method for a V-point-based ceramic sunshade for the windshield includes the following steps:

[0007] A. The driver's V1 field of vision, the sun visor 3 in a vertical position, the interior rearview mirror 2, and the printed surface of the ceramic strip on the front windshield 1 are used as input conditions.

[0008] B. Project point V1 along the Y direction onto the XOZ plane to obtain point V1'. Draw a straight line L1 through point V1' and tangent to the upper edge of the inner rearview mirror 2. The straight line L1 intersects the printed surface 1 of the ceramic strip of the front windshield at point P1.

[0009] C. Move the upper boundary C1 of the printed surface 1 of the ceramic strip of the front windshield parallel to point P1 to obtain curve C2; ​​project the right boundary C3 of the sun visor 3 in the vertical position of the driver's seat onto the printed surface 1 of the ceramic strip along the direction of straight line L1 to obtain curve C4, and obtain the intersection point P2 of C4 and C2.

[0010] D. Draw the XZ plane through point P2. This plane intersects with the printed surface 1 of the front windshield ceramic strip to obtain curve C5. On the printed surface 1 of the front windshield ceramic strip, draw curve C6 through point P2 with an angle of 20° with curve C5.

[0011] E. Find the intersection point P3 of the fillet R1 and the curve C6. On the printed surface 1 of the ceramic strip on the front windshield, move the curve C2 parallel to the point P3 to obtain the curve C7. The curve C7 intersects the curve C4 at point P4. Move the curve C6 parallel to the point P4 to obtain the curve C8.

[0012] F. Curve C8 is symmetrically derived from the XOZ plane to obtain curve C9, which is the right boundary of the ceramic sunshade strip. The fillet radius R3 = 35mm is used to round curves C9 and C2. Curves C2, C8, and C9 are trimmed respectively and combined with R2 and R3 to obtain the aforementioned front windshield ceramic sunshade strip. Figure 7 The grid area shown.

[0013] Further, in step A, the driver's V1 field of vision point is obtained by correcting the R point based on the seat back angle.

[0014] Further, in step C, curve C2 is the lower boundary of the ceramic sunshade strip.

[0015] Further, in step D, the fillet angle R1 between curve C6 and curve C2 is 35mm.

[0016] Further, in step E, curve C8 represents the left boundary of the ceramic sunshade strip.

[0017] Furthermore, the fillet radius R2 between curves C8 and C2 is 35mm.

[0018] Furthermore, curve C9 represents the right boundary of the ceramic sunshade strip.

[0019] Furthermore, the fillet radius R3 between curve C9 and curve C2 is 35mm.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The design method of this invention can quantify the area of ​​the sunshade strip. This method is based on the driver's field of vision V point, specifically based on the upper field of vision V1 point, and combined with the actual usage conditions of the rearview mirror and sun visor. The minimum area of ​​the ceramic sunshade strip is made in 3D CAD software, which can ensure that light cannot enter the driver's eyes from the middle area of ​​the sun visor when the vehicle is driving in direct sunlight, thus ensuring driving safety and taking into account aesthetics. This method, based on the driver's field of vision V1 point, meets the sunshade needs of most people from an ergonomic perspective. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram showing the location of existing ceramic sunshade strips;

[0024] Figure 2 Input condition diagram;

[0025] Figure 3 Schematic diagram of the location of point P1;

[0026] Figure 4 Schematic diagram of the location of point P2;

[0027] Figure 5 Schematic diagram of the position of curve C6;

[0028] Figure 6 Schematic diagram of the position of curve C8;

[0029] Figure 7 Grid area diagram;

[0030] Figure 8 Flowchart of the design method for a V-point-based ceramic sunshade for the windshield. Detailed Implementation

[0031] The present invention will be further described below with reference to embodiments:

[0032] The present invention 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 invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0033] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] This invention relates to a design method for a V-point-based ceramic sunshade strip for the windshield. This method allows for the creation of an effective, minimal sunshade area, ensuring shading performance while maintaining aesthetics. Specifically, it includes the following steps:

[0035] A. Using the driver's V1 field of vision, the vertically positioned sun visor 3, the interior rearview mirror 2, and the printed surface of the ceramic strip on the windshield 1 as input conditions, such as... Figure 2 As shown; where the driver's V1 field of vision point is obtained by correcting the R point based on the seat back angle;

[0036] B. Project point V1 along the Y direction onto the XOZ plane to obtain point V1'. Draw a straight line L1 through point V1' and tangent to the upper edge of the interior rearview mirror 2. Line L1 intersects the printed surface 1 of the ceramic strip on the front windshield at point P1. Figure 3 As shown;

[0037] C. Move the upper boundary C1 of the printed surface 1 of the ceramic sun visor strip 1 parallel to point P1 to obtain curve C2. Curve C2 is the lower boundary of the ceramic sun visor strip. Project the right boundary C3 of the sun visor 3 in the driver's seat vertical position onto the printed surface 1 of the ceramic sun visor strip along the straight line L1 to obtain curve C4, and obtain the intersection point P2 of C4 and C2. Figure 4 As shown;

[0038] D. Draw the XZ plane through point P2. This plane intersects with the printed surface 1 of the front windshield ceramic strip to obtain curve C5. On the printed surface 1 of the front windshield ceramic strip, draw curve C6 through point P2 with an angle of 20° to curve C5. The fillet radius R1 between curve C6 and curve C2 is 35mm. Figure 5 As shown;

[0039] E. Find the intersection point P3 of the fillet R1 and curve C6. On the printed surface 1 of the ceramic sunshade, move curve C2 parallel to point P3 to obtain curve C7. Curve C7 intersects curve C4 at point P4. Move curve C6 parallel to point P4 to obtain curve C8, which is the left boundary of the ceramic sunshade. The fillet R2 of curve C8 and curve C2 is 35mm. Figure 6 As shown;

[0040] F. Curve C8 is symmetrically derived from the XOZ plane to obtain curve C9, which is the right boundary of the ceramic sunshade strip. The fillet radius R3 = 35mm is used to round curves C9 and C2. Curves C2, C8, and C9 are trimmed respectively and combined with R2 and R3 to obtain the aforementioned front windshield ceramic sunshade strip. Figure 7 The grid area shown.

[0041] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A design method for a front windshield ceramic sunshade strip based on V-point, characterized in that, Includes the following steps: A. The driver's V1 field of vision point, the sun visor (3) in a vertical position, the interior rearview mirror (2), and the printed surface of the ceramic strip on the windshield (1) are used as input conditions; the driver's V1 field of vision point is obtained by correcting the R point based on the seat back angle; B. Project point V1 along the Y direction onto the XOZ plane to obtain point V1'. Draw a straight line L1 through point V1' and tangent to the upper edge of the inner rearview mirror (2). The straight line L1 intersects the printed surface (1) of the ceramic strip of the front windshield at point P1. C. Move the upper boundary C1 of the printed surface (1) of the ceramic strip of the front windshield to point P1 in parallel to obtain curve C2; ​​project the right boundary C3 of the sun visor (3) in the driver's seat vertical position onto the printed surface (1) of the ceramic strip along the straight line L1 to obtain curve C4, and obtain the intersection point P2 of C4 and C2; curve C2 is the lower boundary of the ceramic sun visor. D. Draw the XZ plane through point P2. This plane intersects the printed surface (1) of the front windshield ceramic strip to obtain curve C5. On the printed surface (1) of the front windshield ceramic strip, draw curve C6 through point P2 with an angle of 20° with curve C5. The fillet of curve C6 and curve C2 is R1=35mm. E. Find the intersection point P3 of the fillet R1 and the curve C6. On the printed surface (1) of the ceramic strip on the front windshield, move the curve C2 parallel to the position of point P3 to obtain the curve C7. The curve C7 intersects the curve C4 at point P4. Move the curve C6 parallel to the position of point P4 to obtain the curve C8. The curve C8 is the left boundary of the ceramic sunshade. The fillet R2 of the curve C8 and the curve C2 is 35mm. F. Curve C8 is symmetrical about the XOZ plane to obtain curve C9, which is the right boundary of the ceramic sunshade. Curve C9 and curve C2 are rounded with a radius R3 = 35mm. Curves C2, C8, and C9 are trimmed respectively and combined with R2 and R3 to obtain the aforementioned front windshield ceramic sunshade. Curve C9 is the right boundary of the ceramic sunshade.

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