Automobile door frame sealing strip structure and automobile

Abstract

The application provides a kind of automobile door frame sealing strip structure and automobile, belong to the technical field of opening and closing, wherein the automobile door frame sealing strip structure includes fixed structure, sealing bubble tube and support structure;Fixed structure is used for clamping in the door frame side wall sheet metal edge;Fixed structure has mounting surface towards the direction of door frame outside;Sealing bubble tube is connected on the mounting surface of fixed structure, and buffer cavity is formed between sealing bubble tube and mounting surface;Support structure is arranged in buffer cavity, and support structure connects the middle part of mounting surface and sealing bubble tube to support sealing bubble tube;Bending part is arranged on support structure;Support structure is bent and deformed along bending part under stress state.The automobile door frame sealing strip structure provided by the application improves the support performance of the door frame sealing strip structure, prevents fatigue deformation and corner collapse of the door frame sealing strip structure, reduces the force required for closing the door, and achieves the effect of balancing the door sealing and the convenience of closing the door.

Description

Technical Field

[0001] This application belongs to the field of opening and closing technology, and more specifically, relates to an automotive door frame sealing strip structure and an automotive. Background Technology

[0002] A car door frame sealing strip is a sealing element installed around the edge of the opening in a car door frame. Its main function is to work in conjunction with the door sealing strip installed on the edge of the door to effectively seal the gap between the door and the door frame when the door is closed, thereby achieving sound insulation, waterproofing, dustproofing, windproofing, and protecting the edges of the vehicle body.

[0003] Traditional automotive door frame sealing strips generally consist of two parts: a fixed structure and a sealing structure. The fixed structure uses a dense rubber matrix with a metal skeleton to connect to the door frame sheet metal. The sealing structure uses a sponge tube. When the door is closed, the door sealing strip presses tightly against the sponge tube of the door frame sealing strip. The elastic deformation of the sponge tube generates contact pressure, thereby forming a seal.

[0004] Traditional door frame sealing strips typically increase their compression to ensure a good seal. However, increasing the compression sacrifices ease of closing the door, requiring more force. Furthermore, prolonged pressure and deformation accelerate fatigue and uneven wear of the foam tubing, causing the corners of the sealing strip to collapse and compress, thus affecting its sealing performance. Utility Model Content

[0005] The purpose of this application is to provide a car door frame sealing strip structure and a car, which aims to solve the problem that the existing door frame sealing strip cannot simultaneously achieve both sealing and easy door closing.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, embodiments of this application provide an automotive door frame sealing strip structure, comprising:

[0008] A fixing structure for snapping onto the side sheet metal edge of a door frame; the fixing structure has a mounting surface facing outwards from the door frame;

[0009] A sealing bubble tube is connected to the mounting surface of the fixed structure, and a buffer cavity is formed between the sealing bubble tube and the mounting surface;

[0010] A support structure is disposed within the buffer cavity. The support structure connects the mounting surface and the sealing bubble tube to support the sealing bubble tube. The support structure is provided with a bending portion. The support structure undergoes elastic deformation along the bending portion under stress.

[0011] Compared with existing technologies, the automotive door frame sealing strip structure of this application, in its initial state, has both the sealing bubble tube and the supporting structure in an expanded state. The supporting structure connects to the middle of the sealing bubble tube, supporting the middle of the sealing bubble tube and keeping its outer surface smooth. When the door is closed, the top of the sealing bubble tube is compressed, and both the sealing bubble tube and the supporting structure deform simultaneously. During deformation, the first and second buffer cavities are simultaneously compressed, forming a buffer structure. When the sealing bubble tube deforms, the supporting structure bends and deforms along with the bend, resulting in elastic deformation and reducing closing resistance. When the door is opened, the external force on the sealing bubble tube and the supporting structure is removed, and the sealing bubble tube and its internal buffer cavity recover. At the same time, the supporting structure returns to its original shape under its own elasticity. During this recovery, the sealing bubble tube is supported upwards from the middle, allowing it to quickly return to its expanded state and preventing fatigue deformation.

[0012] The beneficial effects of the automotive door frame sealing strip structure provided in this application are as follows: The automotive door frame sealing strip structure provided in this application adds a support structure to the inner cavity of the sealing bubble tube. This support structure increases the support force of the sealing bubble tube, improves its support performance, prevents the sealing bubble tube from failing to recover due to insufficient support force, prevents fatigue deformation of the sealing bubble tube, and avoids corner collapse. The support structure divides the buffer cavity into two buffer sub-cavities. When the sealing bubble tube is under force, both cavities are under force simultaneously, improving the buffering effect. It can also effectively prevent the sudden failure of the entire sealing structure due to fatigue deformation of the sealing bubble tube at one point. When the support structure is under force, the support structure bends along the bending part, reducing the deformation resistance of the support structure, thereby reducing the closing force and avoiding the problems of loud closing noise and poor user experience caused by excessive closing force. Compared to traditional automotive door frame sealing strip structures, the automotive door frame sealing strip structure of this application avoids the problems of fatigue deformation and corner collapse during pressure, improves the buffering effect and support strength, and reduces the force required to close the door; thus achieving the effect of balancing door sealing and easy door closing.

[0013] In some embodiments, the support structure includes:

[0014] The first support portion connects to the fixed structure;

[0015] The second support part is connected to the sealing bubble tube;

[0016] The first support portion and the second support portion are arranged at an angle, and the connection between the first support portion and the second support portion forms the bending portion.

[0017] In the above technical solution, the first support part, the second support part, and the bending part are combined to form a support structure that combines rigidity and flexibility. While ensuring the support strength by combining the two rigid support parts, the bending part is used to achieve a flexible connection between the two rigid support parts, reducing the force required to close the door and improving the user experience.

[0018] In some embodiments, the first support is connected to the centerline of the mounting surface, and the second support is connected to the centerline of the sealing bubble tube.

[0019] In the above technical solution, when the support structure expands, it acts on the middle of the mounting surface and the middle of the sealing bubble tube, ensuring that the support structure maximizes its support effect on the sealing bubble tube. At the same time, it can make the bubble tube sections on both sides of the support structure evenly stressed, avoiding the problem of sharp points caused by excessive stress on one side of the bubble tube section. It also avoids uneven stress caused by sharp points on the surface of the sealing bubble tube, resulting in uneven wear on the surface of the sealing bubble tube, thus improving the service life of the sealing bubble tube.

[0020] In some embodiments, when no external force is applied, the extension line of the second support portion forms an acute angle with the mounting surface.

[0021] In the above technical solution, by controlling the inclination angle of the second support part of the support structure to be an acute angle, the second support part always applies an outward expansion force to the sealing bubble tube, thereby improving the support effect of the support structure. At the same time, the inclination angle of the second support part is used to balance the support strength and the force required to close the door.

[0022] In conjunction with the first aspect, in one possible implementation, the deformation direction of the bent portion is perpendicular to the mounting surface.

[0023] In the above technical solution, the arrangement direction of the support structure is the same as the opening and closing direction of the car door, and the support force generated by the support structure on the sealing bubble tube reaches the maximum; when the car door is opened, the support structure drives the sealing bubble tube to expand and recover rapidly.

[0024] In some embodiments, the opening of the bend faces the side away from the doorway.

[0025] In the above technical solution, the opening of the bending part faces away from the doorway, which maximizes the force exerted on the inner bubble tube section during the outward expansion and repositioning process of the support structure. This leads to the rapid repositioning of the inner bubble tube, improves the support strength of the inner bubble tube, and prevents deformation of the inner bubble tube section.

[0026] In some embodiments, the bent portion is located on the side of the support structure closer to the mounting surface.

[0027] In the above technical solution, the bending part is located on the side of the support structure close to the mounting surface. When the second support part is folded, the folding of the second support part causes a large amount of movement of the inner bubble tube section and the outer bubble tube section, ensuring that the second support part inside the sealed bubble tube has a large coverage area under stress, thereby increasing the support strength of the sealed bubble tube and improving the sealing effect, avoiding the problem of poor sealing.

[0028] In conjunction with the first aspect, in one possible implementation, the sealing bubble tube includes an outer bubble tube segment and an inner bubble tube segment located on both sides of the support structure, and the inner wall of both the outer bubble tube segment and the inner wall of the inner bubble tube segment are provided with concave grooves.

[0029] In the above technical solution, grooves are provided in both the outer and inner bubble tube sections. When the sealing bubble tube is under stress, the outer and inner bubble tube sections bend along the corresponding grooves at the same time, which can reduce the resistance to closing the door, reduce the force required to close the door, and improve the user experience.

[0030] In some embodiments, the bend and the two grooves are located on the same horizontal plane.

[0031] In the above technical solution, when the bending part and the two grooves are on the same horizontal plane, the sealing bubble tube and the supporting structure bend in the same plane; the sealing bubble tube under stress is always in a flat state, which avoids the situation that the two bubble tube sections deform at different positions and the sealing bubble tube wrinkles after the car door is closed.

[0032] Secondly, embodiments of this application also provide a car with a door frame sealing strip structure as described above installed on the door frame.

[0033] Compared with the prior art, the above-mentioned technical solution improves the support performance of the door frame sealing strip structure by installing the aforementioned door frame sealing strip structure on the car door frame, prevents fatigue deformation and corner collapse of the door frame sealing strip structure, and reduces the force required to close the door, thus achieving the effect of balancing door sealing and easy door closing. It also significantly promotes the improvement of the overall vehicle's sealing, sound insulation, waterproofing, and dustproofing, and enhances the user experience. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the automotive door frame sealing strip provided in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram showing the positional relationship between the first support portion and the mounting surface, provided in an embodiment of this application.

[0037] Figure 3 This is a schematic diagram showing the positional relationship of the bent portion provided in an embodiment of this application.

[0038] In the diagram: 1. Fixed structure; 101. Mounting surface; 102. Steel frame; 103. Snap-fit ​​platform; 104. Snap-fit ​​lip; 2. Sealing bubble tube; 201. Fold groove; 3. Support structure; 301. First support part; 302. Second support part; 303. Bending part; 4. Side panel sheet metal; 5. Door sheet metal. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0040] It should be noted that when an element is referred to as being "set on" another element, it can be directly or indirectly set on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are 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 of this application.

[0041] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0042] Please refer to the following: Figures 1 to 3The automotive door frame sealing strip structure provided in this application is described below. The automotive door frame sealing strip structure includes a fixing structure 1, a sealing bubble tube 2, and a supporting structure 3. The fixing structure 1 is used to snap onto the edge of the side sheet metal 4 of the door frame. The fixing structure 1 has a mounting surface 101 facing outwards from the door frame. The sealing bubble tube 2 is connected to the mounting surface 101 of the fixing structure 1, and a buffer cavity is formed between the sealing bubble tube 2 and the mounting surface 101. The supporting structure 3 is located within the buffer cavity, connecting the mounting surface 101 and the sealing bubble tube 2 to support the sealing bubble tube 2. The supporting structure 3 has a bending portion 303. Under stress, the supporting structure 3 undergoes elastic deformation along the bending portion 303. It should be noted that the direction outwards from the door frame is the direction away from the driver's compartment, meaning the sealing bubble tube 2 is located on the outer side of the door frame sheet metal. When the door is closed, the door sealing strip and the sealing bubble tube 2 of the door frame sealing strip structure come into direct contact and deform against each other, achieving a seal between the door and the door frame after deformation.

[0043] The fixing structure 1 is a U-shaped clamping member, with its open side fitted onto the edge of the side panel sheet metal 4. The fixing structure 1 includes an outer clamping part, an end-face clamping part, and an inner clamping part. The outer clamping part is located on the outer side of the door frame, and the inner clamping part is located on the inner side of the door frame. The end-face clamping part connects the outer clamping part and the inner clamping part and covers the edge of the side panel sheet metal 4. The mounting surface 101 is the surface of the outer clamping part away from the door frame sheet metal, and it serves as the support structure 3 for the sealing bubble tube 2, connecting to the sealing bubble tube 2.

[0044] The first end of the sealing blister tube 2 is connected to the edge of the mounting surface 101 near the opening of the fixing structure 1, and the second end of the sealing blister tube 2 is connected to the edge of the mounting surface 101 near the closed end of the fixing structure 1. A buffer cavity is formed between the sealing blister tube 2 and the mounting surface 101.

[0045] A support structure 3 is installed inside the buffer cavity. The first end of the support structure 3 is connected to the mounting surface 101, and the second end is connected to the sealing bubble tube 2. The support structure 3 increases the supporting force of the sealing strip structure in the direction perpendicular to the mounting surface 101, and improves the holding force of the sealing bubble tube 2. The support structure 3 is connected to the bubble tube, dividing the buffer cavity into a first buffer sub-cavity and a second buffer sub-cavity. When the door is closed, the first buffer cavity and the second buffer cavity are simultaneously compressed. A bending part 303 is provided on the support structure 3. When under force, the support structure 3 bends at the bending part 303 as the inflection point, which facilitates the elastic deformation of the support structure 3 along with the sealing bubble tube 2, improving the ease of closing the door and reducing the force required to close the door.

[0046] The working process of the automotive door frame sealing strip structure provided in this application is as follows: In the initial state, both the sealing bubble tube 2 and the support structure 3 are in an expanded state. The support structure 3 connects to the middle of the sealing bubble tube 2, supports the middle of the sealing bubble tube 2, and makes the outer surface of the sealing bubble tube 2 in a smooth state.

[0047] When the door is closed, the top of the sealing bubble tube 2 is compressed, and both the sealing bubble tube 2 and the support structure 3 deform simultaneously. During the deformation process, the first buffer cavity and the second buffer cavity are squeezed at the same time to form a buffer structure; when the sealing bubble tube 2 deforms, the support structure 3 bends and deforms with the bending part 303 as the bending point, and the support structure 3 undergoes elastic deformation, reducing the closing resistance.

[0048] When the door is opened, the external force on the sealing bubble tube 2 and the supporting structure 3 is removed, and the sealing bubble tube 2 and its internal buffer cavity are restored. At the same time, the supporting structure 3 returns to its original shape under the elastic action of the bending part 303. During the restoration, the sealing bubble tube 2 is supported from the middle upwards, so that the sealing bubble tube 2 quickly returns to its expanded state and avoids fatigue deformation of the bubble tube.

[0049] The automotive door frame sealing strip structure provided in this application has the following advantages compared with the prior art:

[0050] (1) In order to improve the sealing effect, traditional automotive door frame sealing strips often choose to increase the redundancy of the sealing bubble tube 2 to increase the compression of the sealing strip. This leads to increased deformation and insufficient support force of the sealing bubble tube 2 when it is compressed. Over time, the corners of the sealing bubble tube 2 will undergo fatigue deformation, resulting in corner collapse, which affects the sealing performance and aesthetics. In this embodiment, the bubble tube structure is still used as the sealing structure, which is a mature technology. A support structure 3 is added to the inner cavity of the sealing bubble tube 2. The support structure 3 is used to increase the support force of the sealing bubble tube 2, improve the support performance of the sealing bubble tube 2, prevent the sealing bubble tube 2 from failing to recover due to insufficient support force, prevent fatigue deformation of the sealing bubble tube 2, and avoid corner collapse.

[0051] (2) In the traditional automotive door frame sealing strip structure, there is only one buffer cavity. When fatigue deformation occurs at a certain point of the sealing bubble tube 2, the entire buffer cavity loses its buffering effect. In this embodiment, the support structure 3 divides the buffer cavity into two buffer sub-cavities. When the sealing bubble tube 2 is under force, the two cavities are under force simultaneously, improving the buffering effect. It can also effectively prevent the sealing bubble tube 2 from suddenly failing due to fatigue deformation at a certain point.

[0052] (3) In traditional automotive door frame sealing strip structures, increasing the compression of the sealing sleeve will increase the required compression deformation of the sealing bubble tube 2, thus increasing the closing force. In this embodiment, because a bending part 303 is added to the support structure 3, when the support structure 3 is under force, the support structure 3 bends along the bending part 303, forming elastic deformation, reducing the deformation resistance of the support structure 3, thereby reducing the closing force and avoiding the problem of loud closing noise and poor user experience caused by excessive closing force; achieving the effect of balancing door sealing and easy closing.

[0053] To ensure the tight connection between the door frame sealing strip structure and the side sheet metal 4, a steel frame 102 is added inside the fixing structure 1. The steel frame 102 adopts a U-shaped structure. The fixing structure 1 can be made of EPDM solid rubber. EPDM is ethylene propylene diene monomer rubber.

[0054] A snap-fit ​​platform 103 and a snap-fit ​​lip 104 are provided inside the cavity of the U-shaped fixing structure 1. The snap-fit ​​platform 103 can be located on the inner sidewall of the outer clamping part, and the snap-fit ​​lip 104 can be located on the inner sidewall of the inner clamping part. During installation, the snap-fit ​​platform 103 and the snap-fit ​​lip 104 cooperate to fix the side panel sheet metal 4 in the cavity of the fixing structure 1, thereby increasing the pull-out force of the sealing strip. A decorative lip extending towards the interior of the vehicle body is also provided on the side of the fixing structure 1 away from the sealing bubble tube 2.

[0055] Both the sealing bubble tube 2 and the supporting structure 3 mentioned above can be made of EPDM foam adhesive. EPDM foam adhesive is relatively soft, has strong toughness, and excellent cushioning and impact resistance.

[0056] In this embodiment, the support structure 3 can be selected from shapes such as columnar, sheet-like, or frustum-shaped. The material of the support structure 3 is the same as that of the sealing bubble tube 2, and the support structure 3 and the sealing bubble tube 2 can be integrally molded.

[0057] In some embodiments, the support structure 3 described above can be as follows: Figure 1 The columnar structure shown. See also Figure 1 The support structure 3 is columnar, connecting the mounting surface 101 and the sealing bubble tube 2 in its height direction. The bent portion is a concave arc-shaped groove on one side of the support structure 3. The opening of the concave arc-shaped groove faces the outer side or the inner side of the door frame. Here, the inner side of the door frame is the opening formed by the door frame. An arc-shaped protrusion may be present on the side of the bent portion away from the groove opening to limit the bending direction of the support structure 3 to only facing the side of the groove opening. The bent portion can also be formed by bending the columnar support structure 3. Based on the bending of the columnar support structure 3 itself, applying external pressure will cause the support structure 3 to continue to bend deeper along the bend.

[0058] The aforementioned support structure 3 can also be replaced by a sheet structure. When the support structure 3 is a sheet structure, the length direction of the support structure 3 is consistent with the length direction of the sealing bubble tube 2, and the two ends of the support structure 3 in the height direction are respectively connected to the mounting surface 101 and the sealing bubble tube 2. The support structure 3 is bent along its thickness direction. The bent part 303 is a concave arc-shaped groove opened on one side of the support structure 3, and the opening of the concave arc-shaped groove faces the outside or inside of the vehicle body door frame.

[0059] The aforementioned support structure 3 can also be replaced by a frustum-shaped structure. When the support structure 3 is a frustum-shaped structure, it includes a first frustum and a second frustum symmetrically arranged. The first frustum is fixed on the mounting surface 101, and its outer diameter gradually decreases from the mounting surface 101 toward the sealing bubble tube 2. The second frustum has the same structure as the first frustum, is fixed in the middle of the sealing bubble tube 2, and its outer diameter gradually decreases from the sealing bubble tube 2 toward the mounting surface 101. The second frustum and the first frustum are connected, and a bend 303 is formed at their connection. Under stress, the cross-sectional area of ​​the bend 303 is the smallest, thus it undergoes bending deformation under pressure.

[0060] In some embodiments, such as Figures 1 to 3 As shown, based on the columnar structure of the support structure 3, the support structure 3 includes a first support part 301 and a second support part 302. The first support part 301 is connected to the fixed structure 1; the second support part 302 is connected to the sealing bubble tube 2; the first support part 301 and the second support part 302 are set at an angle, and a bending part 303 is formed at the connection between the first support part 301 and the second support part 302.

[0061] The first support portion 301 and the second support portion 302 are connected, and a bending portion 303 is formed at the connection point, giving the first support portion 301 and the second support portion 302 a certain rigidity. The bending portion 303 serves as the only bending point to achieve deformation along the opening and closing direction of the door. Both the first support portion 301 and the second support portion 302 can be adopted as circular, square, or rhomboid column structures.

[0062] When the car door is opened and closed, the first support part 301, the second support part 302 and the bending part 303 combine to form a support structure 3 that combines rigidity and flexibility. While ensuring the support strength by combining the two rigid support parts, the bending part 303 is used to realize the flexible connection of the two rigid support parts, reducing the force required to close the door and improving the user experience.

[0063] Taking a cylindrical structure as an example, where both the first support portion 301 and the second support portion 302 are cylindrical, the outer diameters of the first support portion 301 and the second support portion 302 are the same. The axial direction of the first support portion 301 and the axial direction of the second support portion 302 are set at an angle, forming a bend 303 at the connection between the first support portion 301 and the second support portion 302. When the first support portion 301 and the second support portion 302 are subjected to pressure, the first support portion 301 and the second support portion 302 bend further along the bend 303, and the angle between the first support portion 301 and the second support portion 302 decreases to accommodate the deformation of the sealing bubble tube 2.

[0064] When the car door is closed, the support structure 3 is bent under force, and the first support part 301 and the second support part 302 approach each other or even fit together. The first support part 301 and the second support part 302 cooperate to form a support structure in the middle of the buffer cavity to increase the support strength in the middle of the sealing bubble tube 2.

[0065] When the car door is opened, the external force on the support structure 3 is removed. The first support part 301 and the second support part 302, which were squeezed and deformed, move outward under their own elastic force, thereby pushing the middle part of the sealing bubble tube 2 to open outward, so that the sealing bubble tube 2 can quickly return to the expanded state.

[0066] In some embodiments, such as Figure 1 and Figure 2 As shown, the two ends of the sealing blister tube 2 are two mounting points of the sealing blister tube 2, and the two mounting points of the sealing blister tube 2 are respectively connected to the two edges of the mounting surface 101. The two mounting points of the sealing blister tube 2 are spaced apart, and the first support part 301 of the support structure 3 can be connected at any position between the two mounting points.

[0067] The second support part 302 of the elastic support structure 3 can be connected to the center line of the sealing bubble tube 2 to improve the support performance of the middle part of the sealing bubble tube 2, and at the same time balance the force on both sides of the sealing bubble tube 2, so as to avoid excessive support force on one side of the sealing bubble tube 2, which would cause sharp points to be generated in the local area of ​​the sealing bubble tube 2 and affect the aesthetics.

[0068] Meanwhile, the first support portion 301 of the support structure 3 is connected to the centerline of the mounting surface 101, making the distances from the first support portion 301 to the two mounting points of the sealing bubble tube 2 equal. For example... Figure 2 As shown, the distance from the first support part 301 to the first installation point of the sealing bubble tube 2 is d1, and the distance from the second support part 302 to the second installation point of the sealing bubble tube 2 is d2, at which point d1=d2.

[0069] When the first support part 301 is connected to the middle of the mounting surface 101 and the second support part 302 is connected to the middle of the sealing tube 2, the support structure 3 expands by acting on the middle of the mounting surface 101 and the middle of the sealing tube 2 respectively. This structural arrangement can maximize the support effect of the support structure 3 on the sealing tube 2; at the same time, it ensures that the tube sections on both sides of the support structure 3 are subjected to uniform force, avoiding the problem of sharp points caused by excessive force on one side of the tube section, thus improving the aesthetics of the door frame sealing strip structure; and it also avoids the problem of uneven force caused by sharp points on the surface of the sealing tube 2, resulting in uneven wear on the surface of the sealing tube 2, thereby improving the service life of the sealing tube 2.

[0070] In some embodiments, such as Figure 3 As shown, the first support portion 301 and the second support portion 302 are integrally formed. A bend is formed at the connection between the first support portion 301 and the second support portion 302. Under the action of the bend 303, the longitudinal section of the support structure 3 forms a V shape. The opening of the V shape faces the doorway or faces away from the doorway. Taking the plane where the doorway is located as the reference plane, the opening direction of the U-shaped fixing structure 1 is the direction away from the doorway.

[0071] To ensure the support strength of the support structure 3 for the sealing bubble tube 2, it is required that, under the condition of no external force, the first support part 301 is perpendicularly connected to the mounting surface 101 or inclinedly connected, and the extension line of the second support part 302 forms an acute angle with the mounting surface 101. A bend 303 is formed between the second support part 302 and the first support part 301.

[0072] The inclination of the second support part 302 along its length direction relative to the plane of the mounting surface 101 ensures that the second support part 302 is always in a state of compression and deformation, and its own elasticity will exert an outward expansion force on the sealing bubble tube 2.

[0073] If the tilt angle of the second support 302 is too large, the expansion force exerted by the second support 302 on the sealing bubble tube 2 will be large, and the force required for the second support 302 to bend along the bending part 303 will be large. Therefore, a large force is required when the car door is closed, which will affect the user experience.

[0074] If the tilt angle of the second support portion 302 is too small, the expansion force applied by the second support portion 302 to the sealing bubble tube 2 will be small, and the force required for the second support portion 302 to bend along the bending portion 303 will be small. At this time, the second support portion 302 cannot promptly drive the middle part of the sealing bubble tube 2 to return to its original position, and the required support effect cannot be achieved.

[0075] Especially in the bent parts of the door frame, the sealing bubble tube 2 is subjected to greater stress and is prone to sealing failure. Therefore, it is necessary to control the tilt angle of the support structure 3 to maximize its supporting effect. Optionally, the angle between the length direction of the second support part 302 and the mounting surface 101 is α, where 40° < α < 50°.

[0076] In some embodiments, such as Figures 1 to 3 As shown, in order to ensure the support effect of the support structure 3 on the sealing bubble tube 2, the deformation direction of the bending part 303 is perpendicular to the mounting surface 101.

[0077] like Figure 1 As shown, based on the columnar structure of the support structure 3, the plane containing the rebound direction of the bent portion 303 is perpendicular to the mounting surface 101, that is, the arrangement direction of the bent portion 303 is the same as the opening and closing direction of the door. For example, the support structure 3 is a columnar structure with its own bend. When it is not subjected to external force, the elastic deformation of the bent portion 303 always drives the first support portion 301 and the second support portion 302 to expand in opposite directions, so that the support structure 3 always has the tendency to return to its original state.

[0078] When the car door is closed, the support structure 3 applies a supporting force to the sealing bubble tube 2 in the direction of the door opening and closing, which enhances the supporting effect of the door frame sealing strip structure, avoids insufficient support of the door frame sealing strip structure to the door sheet metal 5 during the closing process, reduces abnormal noise when closing the door, and improves the sound insulation quality of the door frame sealing strip structure.

[0079] When the car door is opened, the external pressure on the support structure 3 disappears, and the support structure 3 stretches toward the side away from the mounting surface 101 under the action of the bending spring force, and supports the middle of the sealing bubble tube 2, so that it quickly recovers.

[0080] When the arrangement direction of the support structure 3 is the same as the opening and closing direction of the door, the support force generated by the support structure 3 on the sealing bubble tube 2 reaches its maximum.

[0081] In some embodiments, such as Figure 3 As shown, based on the V-shaped longitudinal section of the support structure 3, the opening direction of the bent part 303 faces the side away from the doorway.

[0082] Here, the fixing structure 1 is arranged around the edge of the door opening, with the mounting surface 101 of the fixing structure 1 facing the outside of the door frame; the sealing bubble tube 2 is disposed on the mounting surface 101, located on the outside of the door frame. The deformation direction of the support structure 3 inside the sealing bubble tube 2 is perpendicular to the mounting surface 101, meaning the support structure 3 has a deformation tendency to expand outwards towards the door frame. The opening direction of the bent portion of the support structure 3 is perpendicular to the deformation tendency direction of the support structure 3; therefore, the opening direction of the bent portion of the support structure 3 must face towards or away from the door opening. Taking the plane where the door opening is located as the reference plane, the opening direction of the bent portion of the support structure 3 is parallel to the aforementioned reference plane.

[0083] The supporting structure 3 divides the sealing bubble tube 2 into an outer bubble tube segment and an inner bubble tube segment. The outer bubble tube segment is closer to the open end of the fixing structure 1, and the inner bubble tube segment is closer to the closed end of the fixing structure 1. That is, the outer bubble tube segment is located on the side of the inner bubble tube segment away from the door opening. When the opening direction of the bending part 303 is away from the door opening, the bending angle of the bending part 303 decreases under pressure, and the second supporting part 302 drives the inner bubble tube segment to move away from the door opening. When the bending part 303 expands, the second supporting part 302 drives the inner bubble tube segment to move closer to the door opening to restore the expanded state of the inner bubble tube segment.

[0084] Specifically, when the car door is closed, the second support part 302 of the support structure 3 folds away from the door opening, causing the inner bubble tube section to shift towards the outer bubble tube section. Part of the inner bubble tube section, the second support part 302 and the first support part 301 form a support structure that is stacked in sequence, which improves the support strength of the door frame sealing strip structure.

[0085] When the car door is opened, the second support part 302 of the support structure 3 expands and resets, exerting the greatest force on the inner bubble tube segment. The second support part 302 can drive the inner bubble tube to reset quickly, improve the support strength of the inner bubble tube, and prevent deformation of the inner bubble tube segment.

[0086] Optionally, the first support portion 301 and the second support portion 302 are symmetrically arranged along the centerline of the bent portion 303.

[0087] In some embodiments, such as Figure 3 As shown, when the car door is closed, a receiving space is formed between the door sheet metal 5 and the fixed structure 1. The sealing bubble 2 is located within this receiving space and is deformed by the compression of the door sheet metal 5 and the fixed structure 1 to seal the receiving space. Within this receiving space, the deformation range of the sealing bubble 2 affects the sealing effect of the car door.

[0088] The position of the bending part 303 of the support structure 3 affects the bending degree of the sealing bubble tube 2. When the bending part 303 of the support structure 3 is close to the top of the sealing bubble tube 2, that is, the length of the second support part 302 is less than the length of the first support part 301, the movement of the inner bubble tube section and the outer bubble tube section is small when the second support part 302 is folded. This makes the middle support of the sealing bubble tube 2 thicker and the sides thinner, which makes it easy for a gap to be generated between the top of the sealing bubble tube 2 and the door sheet metal 5, reducing the sealing performance. The top is prone to poor sealing, which may even affect the sealing performance of the whole vehicle. When the bent portion 303 of the support structure 3 is close to the bottom of the sealing bubble tube 2, that is, the length of the second support portion 302 is greater than the length of the first support portion 301; when folding, the second support portion 302 folds and causes the inner bubble tube segment and the outer bubble tube segment to move a large amount, ensuring that the second support portion 302 inside the sealing bubble tube 2 has a large coverage area under stress, thereby increasing the support strength of the sealing bubble tube 2 and improving the sealing effect.

[0089] Therefore, the bending portion 303 is located on the side of the support structure 3 closer to the mounting surface 101, so that the length of the second support portion 302 is greater than the length of the first support portion 301, thus avoiding the problem of poor sealing.

[0090] Optionally, a central plane is provided in the accommodating space between the door sheet metal 5 and the fixed structure 1, and the distance between the central plane and the door sheet metal 5 is equal to the distance between the central plane and the fixed structure 1. The bent portion 303 is located between the central plane and the fixed structure 1.

[0091] In some embodiments, such as Figure 1 As shown, when the car door is closed, the sealing bubble tube 2 will also bend and deform due to external pressure. The sealing bubble tube 2 includes an outer bubble tube segment and an inner bubble tube segment located on both sides of the support structure 3, and both the outer and inner bubble tube segments deform. To reduce the resistance to closing the car door, the inner wall of both the outer and inner bubble tube segments is provided with a concave groove 201.

[0092] Specifically, a first folding groove 201 is provided on the outer bubble tube section, and a second folding groove 201 is provided on the inner bubble tube section.

[0093] When the car door is closed, the sealing bubble tube 2 is compressed and bends. The outer bubble tube segment bends along the first fold groove 201, and the inner bubble tube segment bends along the second fold groove 201. The first fold groove 201 and the second fold groove 201 can be grooves. The depth of the first fold groove 201 is the same as the depth of the second fold groove 201, so that the bending resistance of the two bubble tube segments is the same.

[0094] The depth of the first groove 201 can be greater than the depth of the second groove 201, so that the bending resistance of the inner bubble tube section is greater than that of the outer bubble tube section, thereby improving the support strength of the inner bubble tube section and preventing deformation of the inner bubble tube section.

[0095] The first groove 201 and the second groove 201 are located on the same plane, and this plane is parallel to the mounting surface 101. When the sealing tube 2 deforms, the two parts of the sealing tube 2 deform on the same plane, avoiding wrinkles in the sealing tube 2 due to a height difference at the bending position. Here, height refers to the vertical distance between the groove 201 and the mounting surface 101. When the vertical distance between the first groove 201 and the mounting surface 101 and the second groove 201 are not equal, there is a height difference between the first groove 201 and the second groove 201.

[0096] In one embodiment, such as Figure 2 As shown, when the bending part 303 and the two folds 201 are both on the same horizontal plane, the sealing bubble tube 2 and the supporting structure 3 bend in the same plane. This ensures that the sealing bubble tube 2 remains flat under stress, preventing inconsistent deformation positions of the two bubble tube sections and wrinkles in the sealing bubble tube 2 after the door is closed.

[0097] In production, the sealing blister 2 and the fixed structure 1 are made of different materials and are typically manufactured as a single unit using a two-material co-extrusion molding process. Due to the material difference, a material boundary line is automatically formed between the sealing blister 2 and the fixed structure 1 during production. Two-material co-extrusion technology is commonly used to produce double-layer plastic products. Two materials with different properties are fed to the extrusion equipment through different flow channels and then combined in a mold to form a complete product. In this sealing strip structure, two-material co-extrusion technology is applied to achieve the one-piece molding of the fixed structure 1 and the sealing blister 2.

[0098] Similarly, the supporting structure 3 and the sealing bubble tube 2 are made of the same material, and the supporting structure 3, the sealing bubble tube 2, and the fixing structure 1 are extruded and shaped simultaneously. Therefore, the material boundary line at the root of the supporting structure 3 and the material boundary line at the root of the sealing bubble tube 2 are located in the same plane, and the bending part 303 and the groove 201 can be set at the boundary line.

[0099] When the fixed structure 1 is made of EPDM solid adhesive, the sealing bubble tube 2 is made of EPDM sponge adhesive, and the support structure 3 is made of EPDM sponge adhesive, the two materials will form a boundary line during the co-extrusion process due to the difference in their dense structure and relatively loose structure. The bending part 303 of the support structure 3 and the two grooves 201 of the sealing bubble tube 2 can both be located at this boundary line. In this case, the first support part 301 of the support structure 3 and the root of the sealing bubble tube 2 are both made of EPDM solid adhesive, while the second support part 302 of the support structure 3 and the body structure of the sealing bubble tube 2 are both made of EPDM sponge adhesive.

[0100] Based on the same inventive concept, this application also provides a car with the above-mentioned car door frame sealing strip structure installed at the car door frame.

[0101] The automotive door frame sealing strip structure surrounds the edge of the automotive door frame, covering the side sheet metal 4 of the automotive door frame, while placing the sealing bubble tube 2 on the outside of the side sheet metal 4 to facilitate sealing the space between the door and the door frame.

[0102] Compared with the prior art, the automobile provided in this application improves the support performance of the door frame sealing strip structure by adopting the above-mentioned door frame sealing strip structure, preventing fatigue deformation and corner collapse of the door frame sealing strip structure; while improving the buffering effect of the door frame sealing strip, it reduces the force required to close the door, achieving a balance between door sealing and easy closing; it has a significant promoting effect on improving the overall sealing performance, sound insulation performance, waterproofing, and dustproofing of the vehicle, and also enhances the user experience and aesthetics.

[0103] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A structure of a door frame weather strip for an automobile, characterized by comprising: include: A fixing structure (1) is used to snap onto the edge of the side sheet metal (4) of the door frame; The fixing structure (1) has a mounting surface (101) facing the outside of the door frame; A sealing bubble tube (2) is connected to the mounting surface (101) of the fixed structure (1), and a buffer cavity is formed between the sealing bubble tube (2) and the mounting surface (101); A support structure (3) is provided in the buffer cavity. The support structure (3) connects the mounting surface (101) and the sealing bubble tube (2) to support the sealing bubble tube (2). A bending part (303) is provided on the support structure (3). The support structure (3) undergoes elastic deformation along the bending part (303) under stress.

2. The automotive door frame weatherstrip structure of claim 1, wherein The supporting structure (3) includes: The first support part (301) is connected to the fixed structure (1); The second support part (302) is connected to the sealing bubble tube (2); The first support portion (301) and the second support portion (302) are arranged at an angle, and the bending portion (303) is formed at the connection between the first support portion (301) and the second support portion (302).

3. The automotive door frame weatherstrip structure of claim 2, wherein The first support (301) is connected to the center line of the mounting surface (101), and the second support (302) is connected to the center line of the sealing bubble tube (2).

4. The automotive door frame weatherstrip structure of claim 2, wherein When not subjected to external force, the extension line of the second support (302) forms an acute angle with the mounting surface (101).

5. The automotive door frame sealing strip structure as described in claim 1, characterized in that, The deformation direction of the bent portion (303) is perpendicular to the mounting surface (101).

6. The automotive door frame sealing strip structure as described in claim 5, characterized in that, The opening of the bent portion (303) faces away from the doorway.

7. The automotive door frame sealing strip structure as described in claim 1, characterized in that, The bent portion (303) is located on the side of the support structure (3) near the mounting surface (101).

8. The automotive door frame sealing strip structure as described in claim 1, characterized in that, The sealing bubble tube (2) includes an outer bubble tube section and an inner bubble tube section located on both sides of the support structure (3), and the inner wall of the outer bubble tube section and the inner wall of the inner bubble tube section are provided with concave grooves (201).

9. The automotive door frame sealing strip structure as described in claim 8, characterized in that, The bent portion (303) and the two grooves (201) are both located on the same horizontal plane.

10. An automobile, characterized in that, The car door frame sealing strip structure as described in any one of claims 1-9 is installed at the car door frame.

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