Insert structure for outer water retaining sealing strip, sealing strip and method

Abstract

The invention discloses an insert structure for an outer water retaining sealing strip, the sealing strip and a method, solves the problem that the end part of the outer water retaining sealing strip in the prior art is not accurate enough in positioning, and has the beneficial effect of realizing accurate positioning of the outer water retaining strip and a bright strip matched with the outer water retaining strip. Comprising a positioning insert, the positioning insert is embedded into the outer water retaining sealing strip, the positioning insert is provided with an X-direction positioning boss, the X-direction positioning boss can be attached to an X-direction spigot of a metal plate flanging in the X direction so as to limit the outer water retaining sealing strip in the X direction, the positioning insert is provided with a Z-direction positioning boss, and the Z-direction positioning boss can be inserted into a hole of the metal plate flanging and attached to the hole in the Z direction. A bright strip positioning boss is arranged at one end of the positioning insert and exposed out of the X-direction end of the outer water retaining sealing strip, and one end of the bright strip is attached to the bright strip positioning boss so that the bright strip can be positioned in the X direction.

Description

Technical Field

[0001] The present invention relates to the technical field of outer water blocking sealing strips, in particular to an insert structure, a sealing strip and a method for an outer water blocking sealing strip. Background Art

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] An outer water blocking sealing strip is usually provided at the door of an automobile. The outer water blocking sealing strip is installed on the upper side of the door sheet metal. In actual application, the outer water blocking sealing strip mainly functions to prevent dust, noise, wipe water on the glass, and hold the glass for lifting, etc. There are various ways to install and position the end of the outer water blocking sealing strip. With the improvement of the overall vehicle appearance requirements, assembly process and accuracy, the existing positioning methods for the end of the outer water blocking sealing strip are mostly structures such as direct snap - fit positioning methods and traditional insert positioning methods;

[0004] The inventor found that during the actual assembly process, the outer water blocking sealing strip is often not assembled in place, that is, the assembly accuracy of the outer water blocking sealing strip is not high. The misalignment of the outer water blocking sealing strip affects the position of the bright strip that is snap - fitted with it. The bright strip is a decorative strip of the outer water blocking sealing strip, resulting in problems such as easy X - direction movement and difficult installation matching of the bright strip, and further causing problems such as poor matching effect of the gap surface difference between the outer water blocking sealing strip and the mating part.

[0005] In addition, the existing outer water blocking sealing strip also has the problem that it cannot be accurately positioned, resulting in unqualified rear surface difference after the subsequent installation of the bright strip, requiring rework and resulting in low assembly efficiency. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an insert structure for an outer water blocking sealing strip, which can realize the positioning of the end of the outer water blocking sealing strip in multiple directions and ensure the installation accuracy of the ends of the outer water blocking sealing strip and the bright strip.

[0007] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0008] An insert structure for an outer water blocking sealing strip includes a positioning insert. The positioning insert is embedded in the outer water blocking sealing strip. The positioning insert is provided with an X - direction positioning boss. The X - direction positioning boss can be in X - direction fit with the X - direction stop of the sheet metal flange to limit the outer water blocking sealing strip in the X - direction. The positioning insert is provided with a Z - direction positioning boss. The Z - direction positioning boss can be inserted into the opening of the sheet metal flange and be in Z - direction fit with the opening. One end of the positioning insert is provided with a bright - strip positioning boss. The bright - strip positioning boss protrudes from the X - direction end of the outer water blocking sealing strip. One end of the bright strip is in fit with the bright - strip positioning boss to position the bright strip in the X - direction.

[0009] An insert structure for an outer water blocking sealing strip as described above. After the Z-direction positioning boss of the positioning insert can be inserted into the opening of the sheet metal flanging, the positioning insert is in Y-direction fit with the sheet metal flanging, realizing the Y-direction limit of the outer water blocking sealing strip. In this way, the end of the outer water blocking sealing strip can be effectively positioned in the X-direction, Y-direction, and Z-direction.

[0010] An insert structure for an outer water blocking sealing strip as described above. In combination with the structural form of the sheet metal flanging, to achieve the accurate positioning of the outer water blocking sealing strip, the positioning insert includes an insert body. One side of the insert body protrudes outward to form the X-direction positioning boss. A bright strip positioning boss is arranged on the side of the insert body facing the adjacent sheet metal. The bright strip positioning boss is arranged lower than the X-direction positioning boss, and the bottom side of the bright strip positioning boss is higher than the bottom side of the insert body so that the bright strip positioning boss is higher than the door flanging. The thickness of the bright strip positioning boss is less than the thickness of the X-direction positioning boss.

[0011] An insert structure for an outer water blocking sealing strip as described above. Along the length direction of the outer water blocking sealing strip, the length of the upper side of the X-direction positioning boss is greater than the length of its lower side to match the shape of the door.

[0012] An insert structure for an outer water blocking sealing strip as described above. The insert body is provided with the Z-direction positioning boss. The Z-direction positioning boss is arranged at an interval distance from the X-direction positioning boss. In this way, it is ensured that the positioning insert can be effectively attached to the sheet metal.

[0013] Along the height direction of the insert body, the thickness of the insert body below the bottom side of the Z-direction positioning boss gradually becomes thinner.

[0014] An insert structure for an outer water blocking sealing strip as described above. The Z-direction positioning boss is a reverse fastener, which is inserted into the opening of the sheet metal flanging. The height of the Z-direction positioning boss is less than the height of the opening of the sheet metal flanging, and the width of the opening of the sheet metal flanging is less than the width of the opening of the sheet metal flanging.

[0015] An insert structure for an outer water blocking sealing strip as described above. The height of the insert body is greater than the distance between the bottom side of the opening of the sheet metal flanging and the upper side of the sheet metal flanging, and the length of the insert body is greater than the distance between the side of the opening of the sheet metal flanging and the X-direction stop of the sheet metal flanging.

[0016] In the second aspect, the present invention discloses an outer water blocking sealing strip. The outer water blocking sealing strip forms an integral structure with the insert structure for an outer water blocking sealing strip as described above. A notch is arranged on the side of the outer water blocking sealing strip facing the adjacent sheet metal. The inner side of the outer water blocking sealing strip extends beyond the bright strip positioning boss. The outer end face of the notch extends beyond the end of the bright strip positioning boss, and the end of the bright strip is clamped through the notch and the bright strip positioning boss.

[0017] An outer water blocking sealing strip as described above, wherein the bright strip positioning boss protrudes from the end of the outer water blocking sealing strip, and the positioning insert is located at one end of the outer water blocking sealing strip close to the vehicle B-pillar.

[0018] Thirdly, the present invention also discloses an installation method for an outer water blocking sealing strip and a bright strip. Using the outer water blocking sealing strip described above, it includes the following contents:

[0019] The positioning insert is embedded in the outer water blocking sealing strip. A notch is provided on the side of the outer water blocking sealing strip facing the adjacent sheet metal. The inner side of the outer water blocking sealing strip extends beyond the bright strip positioning boss.

[0020] The notch and the bright strip positioning boss are used to clamp the end of the bright strip.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1) In the present invention, the insert structure is reasonably arranged. The insert structure includes a positioning insert, which is embedded in the outer water blocking sealing strip. The positioning insert is provided with an X-direction positioning boss. The X-direction positioning boss can be in X-direction fit with the X-direction stop of the sheet metal flange to perform X-direction limit on the outer water blocking sealing strip. The Z-direction positioning boss can be inserted into the opening of the sheet metal flange and be in Z-direction fit with the opening. In this way, when the outer water blocking sealing strip is assembled with the sheet metal, the end of the outer water blocking sealing strip can be accurately positioned. One end of the positioning insert is provided with a bright strip positioning boss. One end of the bright strip is in fit with the bright strip positioning boss to perform X-direction positioning on the bright strip and limit the bright strip to prevent the bright strip from moving in the X direction. It solves the problem that the end of the outer water blocking strip cannot be fixed and is prone to warping at the end due to improper installation. Through the insert structure, the outer water blocking sealing strip can be firmly fixed on the sheet metal, i.e., the car door.

[0023] 2) In the present invention, by using the opening of the sheet metal flange, the Z-direction positioning boss of the positioning insert can be inserted into the opening of the sheet metal flange. After insertion, the positioning insert and the sheet metal flange achieve Y-direction fit. Because the positioning insert and the outer water blocking sealing strip are an integral structural part, the end of the outer water blocking sealing strip can be positioned in the Y direction through the positioning insert, and at the same time, the separation of the outer water blocking sealing strip from the sheet metal is avoided.

[0024] 3) In the present invention, the insert structure is reasonably arranged. The entire insert structure can simultaneously achieve effective positioning of the end of the outer water blocking sealing strip in the X / Y / Z three directions, and effectively ensure the X-direction positioning of the bright strip clamping. Because the positions of the sheet metals have been determined, the insert structure can ensure the accuracy of the bright strip position, ensure the matching gap and surface difference between the bright strip and the mating part (the bright strip at another sheet metal), solve the problem of inaccurate end positioning during installation by the operator, greatly improve the assembly consistency, is beneficial to the improvement of the product appearance refinement, and the assembly is simple and easy to operate, improving the assembly efficiency. Description of the Drawings

[0025] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1 It is a schematic diagram of the door sheet metal structure.

[0027] Figure 2 It is a schematic diagram of an insert structure for an outer water blocking sealing strip according to one or more embodiments of the present invention.

[0028] Figure 3 It is a schematic diagram of the cooperation between an insert structure for an outer water blocking sealing strip and the flanging of the door sheet metal according to one or more embodiments of the present invention.

[0029] Figure 4 It is a schematic diagram of the cooperation between an insert structure for an outer water blocking sealing strip and a bright strip according to one or more embodiments of the present invention.

[0030] Figure 5 It is a schematic diagram of the positional relationship between an insert structure for an outer water blocking sealing strip and an adjacent outer water blocking sealing strip according to one or more embodiments of the present invention.

[0031] Figure 6 It is a schematic diagram of the positional relationship between an outer water blocking sealing strip and an adjacent bright strip according to one or more embodiments of the present invention.

[0032] Figure 7 It is a schematic diagram of the positional relationship between two adjacent bright strips after an insert structure for an outer water blocking sealing strip is applied to the door sheet metal according to one or more embodiments of the present invention.

[0033] Figure 8 It is a schematic diagram of the longitudinal section of the Z - direction positioning boss at the inner part of the outer water blocking sealing strip of an insert structure for an outer water blocking sealing strip according to one or more embodiments of the present invention.

[0034] In the figure: The distances or dimensions between each part are exaggerated for showing the positions of each part, and the schematic diagram is only for illustration.

[0035] Wherein: 1. Door sheet metal; 2. X - direction stop of the sheet metal flanging; 3. Hole in the sheet metal flanging; 4. Positioning insert; 5. X - direction positioning boss; 6. Z - direction positioning boss; 7. Bright strip positioning boss; 8. Bright strip; 9. Outer water blocking sealing strip; 10. Insert body; 11. Notch; 12. Convex part, 13. Sheet metal flanging. Detailed implementation mode

[0036] It should be noted that the following detailed description is illustrative and aims to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention pertains.

[0037] It should be noted that the terms used herein are merely for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0038] As introduced in the background art, there is a problem in the prior art that the end positioning of the outer water blocking sealing strip is not accurate enough. To solve the above technical problems, the present invention proposes an insert structure for the outer water blocking sealing strip.

[0039] Embodiment 1

[0040] In a typical embodiment of the present invention, referring to Figure 1 and Figure 2 as shown, an insert structure for an outer water blocking sealing strip includes a positioning insert 4. The positioning insert 4 is embedded in the outer water blocking sealing strip 9. The positioning insert 4 is provided with an X-direction positioning boss 5. The X-direction positioning boss 5 can be in X-direction fit with the X-direction stop of the sheet metal flanging 2 to perform X-direction limit on the outer water blocking sealing strip 9. The positioning insert 4 is provided with a Z-direction positioning boss 6. The Z-direction positioning boss 6 can be inserted into the sheet metal flanging opening 3 and be in Z-direction fit with the opening. One end of the positioning insert 4 is provided with a bright strip positioning boss 7. The bright strip positioning boss 7 protrudes from the X-direction end of the outer water blocking sealing strip 9. One end of the bright strip 8 contacts the bright strip positioning boss 7 to perform X-direction positioning on the bright strip 8.

[0041] It should be noted that in this embodiment, the positioning of the end of the outer water blocking sealing strip 9 mainly refers to the positioning of the end of the outer water blocking sealing strip near the B-pillar of the vehicle, and realizes the positioning of the bright strip 8 (the bright strip is clamped with the outer water blocking sealing strip) on the side close to the B-pillar of the vehicle, ensuring the matching gap and surface difference between the bright strips on both sides of the vehicle B-pillar and ensuring the appearance of the vehicle.

[0042] Specifically, for the positioning insert 4 and the embedded part in the outer water blocking sealing strip 9, the positioning insert 4 inside the outer water blocking sealing strip 9 can be set by an injection molding process. The positioning insert 4 is arranged at one end of the outer water blocking sealing strip 9 close to the B-pillar of the vehicle. For the front door sheet metal and the rear door sheet metal of the vehicle, the bright strip positioning bosses 7 of the two positioning inserts 4 are arranged close to each other, and the distance between the two positioning inserts 4 is set.

[0043] It is easily understood that referring to Figure 3 As shown, after the positioning insert 4 can be snapped into the sheet metal flanging opening 3 by the Z-direction positioning boss 6, the positioning insert 4 is in Y-direction fit with the sheet metal flanging 13, realizing the Y-direction limit of the outer water blocking seal strip 9. In this way, the entire insert structure can effectively position the end of the outer water blocking seal strip 9 in the X-direction, Y-direction, and Z-direction.

[0044] Combined with the structural form of the sheet metal flanging, to achieve the accurate positioning of the outer water blocking seal strip 9, referring to Figure 2 As shown, the positioning insert 4 includes an insert body. The main body of the insert body 10 is strip-shaped. One side of the insert body 10 protrudes outward to form an X-direction positioning boss 5. The side of the X-direction positioning boss 5 away from the bright strip positioning boss can be in zero contact with the sheet metal X-direction stop 2, ensuring the clearance surface difference between the end of the outer water blocking seal strip 9 and the mating part. The X-direction positioning boss 5 protrudes outward from the side of the insert body 10 away from the center of the vehicle. That is to say, the thickness of the insert body 10 at the X-direction positioning boss 5 is greater than the thickness of the insert body at the non-X-direction positioning boss (along the width direction of the vehicle). The X-direction positioning boss 5 is set at the same height as the insert body 10, and the length of the X-direction positioning boss 5 is less than the length of the insert body.

[0045] It should be noted that along the height direction of the insert body 10, the thickness of the insert body 10 gradually becomes thinner below the bottom side of the Z-direction positioning boss, that is, the bottom of the insert body is wedge-shaped, which is convenient for the assembly of the outer water blocking seal strip 9 and the sheet metal flanging 13.

[0046] In this embodiment, referring to Figure 4 As shown, a bright strip positioning boss 7 is provided on the side of the insert body 10 facing the adjacent sheet metal. The bright strip positioning boss 7 extends from the X-direction positioning boss 5 towards the vehicle B-pillar. The bright strip positioning boss 7 is set lower than the X-direction positioning boss 5, and the bottom side of the bright strip positioning boss 7 is higher than the insert body 10, so that the bright strip positioning boss 7 will not touch the sheet metal flanging 13 when the outer water blocking seal strip 9 is assembled with the sheet metal flanging. The thickness of the bright strip positioning boss 7 is less than the thickness of the X-direction positioning boss 5. The bright strip positioning boss 7 forms a positioning hard point at the X-direction end of the outer water blocking seal strip, and can be in X-direction zero contact with the bright strip 8, achieving the purpose of limiting the X-direction movement of the bright strip and ensuring the clearance with the mating part.

[0047] It is easily understood that considering that the side of the vehicle door, that is, the sheet metal, close to the vehicle B-pillar is inclined, along the length direction of the vehicle, that is, the length direction of the outer water blocking seal strip 9, the length of the upper side of the X-direction positioning boss 5 is greater than the length of its lower side. When the lengths of the upper and lower sides of the bright strip positioning boss 7 are the same, the length of the upper side of the insert body 10 is greater than the length of the lower side, and the side of the bright strip positioning boss 7 close to the vehicle B-pillar is set as an inclined surface to adapt to the shape of the vehicle door.

[0048] In addition, a Z - direction positioning boss 6 is provided on the insert body 10. The Z - direction positioning boss 6 and the X - direction positioning boss 5 are spaced apart. The upper side of the Z - direction positioning boss 6 can be in zero - fit contact with the upper side of the sheet metal opening 3, ensuring that the positioning insert 4 can be effectively attached to the sheet metal, for achieving the Z - direction limit of the outer water - blocking seal strip 9 and effectively ensuring the Z - direction surface difference between the outer water - blocking seal strip and the mating part.

[0049] Specifically, the Z - direction positioning boss 6 is an inverted fastener. Referring to Figure 8 as shown, the longitudinal section of the Z - direction positioning boss 6 is triangular. The triangle can be a right - angled triangle or an obtuse - angled triangle, ensuring that the Z - direction positioning boss can be inserted into the sheet metal flanging opening 3. The thickness of the upper side of the Z - direction positioning boss 6 is greater than the depth of the sheet metal flanging opening. When the Z - direction positioning boss 6 is inserted into the sheet metal flanging opening 3, the height of the Z - direction positioning boss 6 is less than the height of the sheet metal flanging opening, and the width of the sheet metal flanging opening is less than the width of the sheet metal flanging opening.

[0050] It should be noted that the insert body 10 has a set height. The height of the insert body 10 is greater than the distance between the bottom side of the sheet metal flanging opening 3 and the upper side of the sheet metal flange. The upper side of the insert body 10 is slightly higher than the upper side of the sheet metal flange. The length of the insert body 10 is greater than the distance between the side of the sheet metal flanging opening (referring to the side of the opening away from the X - direction positioning boss) and the X - direction stop of the sheet metal flange. The distance between the side of the insert body 10 away from the bright - strip positioning boss 7 and the X - direction positioning boss 5 is adapted to the distance between the side of the sheet metal flanging opening 3 and the X - direction stop of the sheet metal flange.

[0051] Among them, the sheet metal flanging opening 3 is a rectangular hole.

[0052] In the insert structure disclosed in this embodiment, the positioning insert 4 is provided with an X - direction positioning boss 5 that is in X - direction contact with the X - direction stop 2 of the sheet metal flange, and a Z - direction positioning boss 6 that can be inserted into the sheet metal flanging opening. The Z - direction positioning boss 6 can be in Z - direction contact with the opening. After the Z - direction positioning boss 6 is inserted into the sheet metal flanging opening, the Y - direction positioning of the positioning insert is also realized. Since the positioning insert 4 is embedded in the outer water - blocking seal strip 9, three - direction positioning of the end of the outer water - blocking seal strip is thus realized, which can solve the problem that the end of the outer water - blocking strip cannot be fixed and is prone to end warping due to improper installation. Through the positioning of the end, the outer water - blocking seal strip can be firmly fixed on the car door. One end of the positioning insert 4 is provided with a bright - strip positioning boss 7. One end of the bright strip 8 is in contact with the bright - strip positioning boss to perform X - direction positioning of the bright strip, limit the bright strip, prevent the X - direction movement of the bright strip, and at the same time solve the problem of inaccurate end positioning during installation by the operator, greatly improving the assembly consistency and being beneficial to the improvement of the product appearance refinement.

[0053] Embodiment Two

[0054] This embodiment discloses an outer water blocking sealing strip. The outer water blocking sealing strip forms an integral structure with an insert structure for the outer water blocking sealing strip described in Embodiment 1. After forming the integral structure, an opening is provided at the bottom side of the outer water blocking sealing strip so that a U-shaped groove is arranged inside the outer water blocking sealing strip for assembling with the sheet metal flanging. Refer to Figure 5 and Figure 6 As shown, a notch 11 is provided on one side of the outer water blocking sealing strip 9 facing the adjacent sheet metal. One end of the bright strip positioning boss 7 can be exposed at the notch 11. The inner side of the outer water blocking sealing strip 9 extends beyond the bright strip positioning boss 7. In this way, the upper side, the outer side away from the center of the vehicle, and the end side of the outer water blocking sealing strip 9 are exposed at the notch 11. A step is formed inside the outer water blocking sealing strip at the notch 11. In this way, the bright strip 8 is clamped at the notch, and the end of the bright strip 8 is clamped through the notch 11 and the bright strip positioning boss 7.

[0055] It is easily understandable that one end of the bright strip positioning boss 7 protrudes from the end of the outer water blocking sealing strip 9. During the injection molding process of the outer water blocking sealing strip 9 and the positioning insert 4, a convex portion 12 is formed around the bright strip positioning boss 7 at the end of the outer water blocking sealing strip 9. The two sides of the convex portion 12 are semi-circular, and the middle of the convex portion is rectangular. The outer end face of the notch 11 extends beyond the end of the bright strip positioning boss 7, that is, beyond the convex portion 12, so that a hard point is formed at the end of the outer water blocking sealing strip 9. Refer to Figure 7 As shown, when the bright strip is placed in the notch 11, the bright strip positioning boss 7 can limit the X direction of the bright strip to prevent the X-direction movement of the bright strip 8.

[0056] Embodiment 3

[0057] This embodiment discloses an installation method for an outer water blocking sealing strip and a bright strip. An outer water blocking sealing strip described in Embodiment 2 is adopted, including the following contents:

[0058] The positioning insert 4 is embedded into the outer water blocking sealing strip 9 through an injection molding process. A notch 11 is provided on one side of the outer water blocking sealing strip 9 facing the adjacent sheet metal. The inner side of the outer water blocking sealing strip 9 extends beyond the bright strip positioning boss. One end of the bright strip positioning boss 7 protrudes from the end of the outer water blocking sealing strip, and the outer end face of the notch extends beyond the end of the bright strip positioning boss;

[0059] The end of the bright strip is clamped through the notch 11 and the bright strip positioning boss 7.

[0060] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An insert structure for an external water retaining seal strip, characterized in that: The utility model comprises a positioning insert, which is embedded in the external water retaining sealing strip. The positioning insert is provided with an X-direction positioning boss, which can be fitted with the X-direction stop of the sheet metal flange in the X direction to limit the external water retaining sealing strip in the X direction. The positioning insert is provided with a Z-direction positioning boss, which can be inserted into the sheet metal flange opening and fit with the opening in the Z direction. A bright strip positioning boss is provided at one end of the positioning insert, which is exposed from the X-direction end of the external water retaining sealing strip, and one end of the bright strip fits with the bright strip positioning boss to position the bright strip in the X direction.

2. The insert structure for an external water retaining seal strip according to claim 1, characterized in that: After the positioning boss in the Z direction can be inserted into the opening of the sheet metal flange, the positioning insert and the sheet metal flange are fitted in the Y direction to limit the external water retaining sealing strip in the Y direction.

3. The insert structure for an external water retaining seal strip according to claim 1, characterized in that: The positioning insert includes an insert body, one side of the insert body protrudes outward to form the X-direction positioning boss, and a bright strip positioning boss is arranged on the side of the insert body facing the adjacent sheet metal, the bright strip positioning boss is arranged lower than the X-direction positioning boss, the bottom side of the bright strip positioning boss is arranged higher than the bottom side of the insert body so that the bright strip positioning boss is arranged higher than the door flange, and the thickness of the bright strip positioning boss is less than the thickness of the X-direction positioning boss.

4. The insert structure for an external water retaining seal strip according to claim 1, characterized in that: Along the length direction of the outer water retaining sealing strip, the length of the upper side of the X-direction positioning boss is greater than the length of the lower side thereof to match the shape of the vehicle door.

5. The insert structure for an external water retaining seal strip according to claim 3, characterized in that: The insert body is provided with the Z-direction positioning boss, and the Z-direction positioning boss is spaced apart from the X-direction positioning boss; Along the height direction of the insert body, the thickness of the insert body below the bottom side of the Z-direction positioning boss gradually becomes thinner.

6. The insert structure for an external water retaining seal strip according to claim 1, characterized in that: The Z-direction positioning boss is an undercut part, the height of the Z-direction positioning boss is smaller than the height of the sheet metal flanging opening, and the width of the sheet metal flanging opening is smaller than the width of the sheet metal flanging opening.

7. The insert structure for an external water retaining seal strip according to claim 3, characterized in that: The height of the insert body is greater than the distance between the bottom side of the sheet metal flange opening and the upper side of the sheet metal flange, and the length of the insert body is greater than the distance between the side of the sheet metal flange opening and the X-direction stop of the sheet metal flange.

8. An external water retaining seal strip, characterized in that: The outer water retaining sealing strip forms an integral structure with an insert structure for the outer water retaining sealing strip as described in any one of claims 1-8, a recess is arranged on the side of the outer water retaining sealing strip facing the adjacent sheet metal, the inner side of the outer water retaining sealing strip extends beyond the bright strip positioning boss, the outer end surface of the recess extends beyond the end of the bright strip positioning boss, and is clamped with the end of the bright strip through the recess and the bright strip positioning boss.

9. The external water retaining seal strip according to claim 8, characterized in that: The bright strip positioning boss is protruding from the end of the outer water retaining sealing strip, and the positioning insert is located at one end of the outer water retaining sealing strip close to the B-pillar of the automobile.

10. A method for installing an external water-retaining sealing strip and a bright strip, characterized in that: The external water retaining seal strip according to claim 8 comprises the following contents: The positioning insert is embedded in the outer water retaining sealing strip, a notch is arranged on the side of the outer water retaining sealing strip facing the adjacent sheet metal, and the inner side of the outer water retaining sealing strip is arranged beyond the bright strip positioning boss; The end of the bright strip is clamped with the bright strip through the notch and the bright strip positioning boss.

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