An upper cover plate of a car inner handle

Abstract

The utility model relates to a kind of car inner pull handle upper cover plate in the technical field of car interior accessories, to solve the problems of traditional plug-in structure disassembly inconvenient, easy to damage, low supporting strength and stress concentration.The technical scheme main point is: the upper cover plate body is annular arc curved surface structure, and elastic inner concave strip is equipped in inner and outer edge, and the inner wall is equipped with the micro air bag of multiple cavity communication.The utility model is mainly used for the cover plate at the place of car door panel inner pull handle, with the advantages of convenient assembly and disassembly, strong supporting force, and uniform stress distribution.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive interior accessories, and in particular to a cover plate for automotive interior door handles. Background Technology

[0002] With the development of the automotive industry, the design of various automotive components is receiving increasing attention. The interior door handle cover, as an important part of the door lining, is typically a ring-shaped hollow structure. Its installation stability and ease of disassembly directly affect user experience and maintenance efficiency. Currently, most common interior door handle covers are of a one-piece construction, relying on a sleeve on its inner wall to rigidly connect to a rod on the door's inner wall for fixation. While this method achieves connection, it reveals significant shortcomings in long-term use: First, the rigid connection makes disassembly and assembly laborious and difficult to align, resulting in inconvenient operation; second, repeated disassembly and assembly can easily lead to wear and breakage of the sleeve or rod, affecting the lifespan of the parts; third, the one-piece cover is prone to stress concentration under load, resulting in insufficient local support strength, which may cause deformation or abnormal noise, affecting user experience and product reliability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the existing rigid plug-in structure of the inner door handle cover, such as inconvenience of disassembly and assembly, easy damage, stress concentration and insufficient support strength, and to provide an improved automotive inner door handle cover, so as to achieve the effects of easy loading and unloading, improved support strength and improved stress distribution, thereby extending service life and improving practicality and reliability.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a car interior door handle cover, including a cover body, the cover body being a ring structure with a hollow center and its cross-section being an arc-shaped curved surface; both the outer and inner edges of the cover body are provided with elastic concave strips; the inner wall of the cover body is provided with one or more sets of micro airbags, the micro airbags being a multi-chamber interconnected structure, the interior of which is separated by at least one diaphragm to form multiple interconnected small chambers, and the small chambers are connected to each other through micro through holes or channels on the diaphragm.

[0005] To address the issues of large deformation, high force requirements, and inflexible stress release during the installation and removal of continuous elastic concave strips, this application further specifies that the elastic concave strip is composed of multiple independent arc-shaped elastic segments arranged at intervals along the edge of the upper cover plate body. This achieves more effortless and flexible installation and removal, and facilitates stress dispersion and air circulation, reducing abnormal noise.

[0006] To address the potential issues of adhesive aging and non-removable replacement associated with relying solely on adhesive for fixing micro-airbags, this application further specifies that the bottom edge of the micro-airbag has a snap-fit ​​portion, and the inner wall of the upper cover plate body has a corresponding annular groove adapted to the snap-fit ​​portion. The micro-airbag is fixed by the engagement of the snap-fit ​​portion and the annular groove. This provides a mechanically detachable fixing structure, enhancing connection reliability and facilitating airbag maintenance or replacement.

[0007] To address the potential issues of low connection strength and easy detachment when the elastic concave strip and the upper cover plate body are separately connected, this application further specifies that the elastic concave strip and the upper cover plate body are integrally formed. This improves the overall structural strength and stability, prevents breakage or loosening at the connection point, and extends the service life.

[0008] To address the problems of difficult assembly and disassembly and easy damage associated with traditional rigid plug-in structures, this application further specifies that the upper cover body is embedded and fixed to the car door panel via the elastic concave strip on its edge. This achieves an elastic snap-fit ​​connection between the upper cover and the door panel, making installation convenient and less prone to damage, thus improving assembly efficiency.

[0009] To define a reasonable thickness range for the upper cover plate body and avoid insufficient strength due to excessive thinness or increased weight and cost due to excessive thickness, this application further specifies that the wall thickness of the upper cover plate body is 3mm to 5mm. This achieves a balance between ensuring structural strength and lightweight design, improving product usability and controlling material costs.

[0010] The beneficial effects of this utility model are:

[0011] 1. By setting elastic concave strips on the inner and outer edges and adopting a segmented design, the upper cover can be easily inserted into or removed from the door panel through elastic deformation, avoiding the problems of difficult alignment and easy damage caused by traditional rigid insertion, and significantly improving the efficiency of disassembly and assembly and the operating experience.

[0012] Second, the multi-chamber interconnected micro airbags on the inner wall allow gas to flow between the chambers when compressed, forming a uniform and flexible internal support. Combined with the arc-shaped surface of the upper cover plate and optional one-piece molded concave strips, reinforcing ribs, and other structures, they enhance the overall pressure resistance and deformation resistance, effectively improving the local and overall support strength.

[0013] Third, the combination of the curved surface and the multi-cavity airbag allows the stress to diffuse along the curved surface and be absorbed by the airbag, avoiding stress concentration in local areas; the concave strip segment design also helps to release assembly stress, thereby reducing the risk of deformation, cracks or abnormal noise caused by stress concentration during long-term use and improving structural durability.

[0014] Fourth, the airbag is fixed by a snap-fit ​​method, which facilitates maintenance and replacement; the overall structure has been optimized in terms of strength, stress and disassembly, reducing failures caused by disassembly damage, stress fatigue or support failure, and significantly extending the service life of the top cover. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 yes Figure 1 Cross-sectional structure diagram Figure 1 .

[0018] Figure 3 yes Figure 1 Cross-sectional structure diagram Figure 2 .

[0019] The labels in the attached diagram are: 1. Top cover plate body; 2. Elastic concave strip; 3. Micro airbag; 4. Reinforcing rib. Detailed Implementation

[0020] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Example 1

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a car interior door handle cover, which aims to solve the problems of inconvenient disassembly and assembly, easy damage, low support strength and stress concentration of traditional rigid plug-in structures.

[0023] The core of this inner handle top cover includes a top cover body 1, which is an overall ring-shaped structure with a hollow center to accommodate the installation and operation of the inner handle. Its cross-section is designed as an arc-shaped curved surface. This streamlined structure not only conforms to ergonomics but also effectively disperses external forces along the curved surface, preventing stress concentration at a single point. The wall thickness of the top cover body 1 is set to 3mm to 5mm, a thickness range that ensures sufficient structural strength while achieving lightweight material usage.

[0024] At key installation locations on the upper cover body 1, namely its outer and inner edges, elastic recessed strips 2 are provided. These recessed strips 2 serve as elastic interfaces for engaging with the car door panel, their core function being to transform the traditional rigid connection into a flexible one. The elastic recessed strips 2 and the upper cover body 1 are manufactured using a one-piece injection molding process, forming an integral structure. This greatly enhances the integrity and strength of the connection, eliminating the risk of detachment. To optimize the feel of installation and removal and facilitate stress release, the elastic recessed strips 2 on each edge can be designed as multiple independent arc-shaped elastic segments arranged at intervals along the edge, rather than a continuous complete ring. This segmented design requires less deformation force during installation and makes disassembly easier.

[0025] The upper cover body 1 is fixed in the pre-set mounting groove of the car door panel by the elastic concave strips 2 on its inner and outer edges, so as to achieve true one-press-to-fit and one-pull-to-out, which greatly improves the efficiency of assembly and maintenance.

[0026] To enhance the local support and cushioning performance of the top cover plate under pressure, a set of micro-airbags 3 are arranged on the inner wall of the top cover plate body 1. These micro-airbags 3 are not simple single-cavity structures, but adopt an innovative multi-cavity interconnected design: their interiors are divided into multiple interconnected small chambers by at least one flexible diaphragm, and gas flows between the chambers through micro-holes or channels reserved on the diaphragm. When a certain area is pressed, the gas can flow slowly between the chambers, thereby providing soft, uniform and resilient support, effectively avoiding single-point bulging and a hard, pressing feel, and achieving dynamic stress balance.

[0027] Regarding the fixing method of the miniature airbag 3, for ease of maintenance and disassembly, a ring of snap-fit ​​parts (such as barbs or flanges) can be molded around the bottom edge of the miniature airbag 3, while a precisely matching annular groove is machined on the inner wall of the upper cover plate body 1. During installation, the snap-fit ​​parts are engaged with the annular groove by pressing, and during disassembly, it can be pried up from the edge for easy individual inspection or replacement of the airbag.

[0028] The working principle of this car interior door handle cover is as follows: During installation, the operator aligns the cover body 1 with the door panel mounting position and presses it down slightly. The elastic concave strip 2 deforms elastically and then fits into the door panel groove, completing the installation. When the user operates the interior door handle, the hand pressure acts on the curved surface of the cover. Part of the pressure is dispersed and transmitted by the curved surface structure, and the other part is transmitted to the micro airbags 3 on the inner wall. The multi-chamber interconnected airbags absorb and buffer local pressure through internal gas flow and chamber deformation, providing comfortable support. At the same time, they evenly distribute stress to the entire back area of ​​the cover, working together with the curved surface to avoid stress concentration. When disassembly is required, simply pull the edge of the cover outward with even force. The elastic concave strip 2 deforms again and detaches from the door panel. The process is simple and does not damage any parts.

[0029] Example 2

[0030] Compared to Example 1, Example 2 differs in that the elastic concave strip 2 adopts a split design. It is not integrally formed with the upper cover body 1, but rather consists of an independent elastic strip. Mounting grooves matching the shape of the elastic strip are respectively formed on the outer and inner edges of the upper cover body 1. The elastic strip is detachably snapped or pasted into the mounting groove by a protrusion on its back or by adhesive. This design allows the elastic concave strip 2 to be replaced individually. If it ages or is damaged due to long-term use, it is not necessary to replace the entire upper cover; only the strip needs to be replaced, significantly reducing maintenance costs. Furthermore, elastic strips of different hardness or size can be selected according to the thickness or hardness of the door panel of different car models, improving the product's adaptability and versatility.

[0031] Example 3

[0032] The difference between Example 3 and Example 1 is as follows: See Figure 3 In addition to the area where the micro-airbags 3 are installed, the inner wall of the upper cover plate body 1 is integrally formed with radial or grid-like raised reinforcing ribs 4. The micro-airbags 3 are embedded in the grid cavities divided by these reinforcing ribs. The micro-airbags 3 themselves are still multi-cavity interconnected structures, and their height is slightly higher than or flush with the top plane of the surrounding reinforcing ribs 4. By setting up a network of reinforcing ribs 4, a stable rigid support skeleton is provided for the upper cover plate body 1, which significantly improves the overall bending and torsional stiffness. The micro-airbags 3 are embedded in it, which not only achieve positioning and lateral protection, but also focus on providing flexible cushioning in the vertical direction. This composite structure of rigid skeleton and flexible cushioning unit achieves the optimal combination of local flexibility and overall rigidity, and performs more reliably and durablely when dealing with complex forces.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A door cover for a car interior door handle, characterized in that: The system includes an upper cover body (1), which is a ring-shaped structure with a hollow center and an arc-shaped cross-section. The outer and inner edges of the upper cover body (1) are provided with elastic concave strips (2). The inner wall of the upper cover body (1) is provided with one or more sets of micro airbags (3). The micro airbags (3) are multi-chamber interconnected structures, and their interiors are separated by at least one diaphragm to form multiple interconnected small chambers. The small chambers are connected to each other through micro-holes or channels on the diaphragm.

2. The automotive interior door handle cover according to claim 1, characterized in that: The elastic concave strip (2) is composed of multiple independent arc-shaped elastic segments arranged at intervals along the edge of the upper cover plate body (1).

3. The automotive interior door handle cover according to claim 1, characterized in that: The bottom edge of the micro airbag (3) is provided with a snap-fit ​​part, and the inner wall of the upper cover plate body (1) is provided with an annular groove that is adapted to the snap-fit ​​part. The micro airbag (3) is fixed by the engagement of the snap-fit ​​part and the annular groove.

4. The automotive interior door handle cover according to claim 1, characterized in that: The elastic concave strip (2) and the upper cover plate body (1) are integrally formed.

5. The automotive interior door handle cover according to claim 1, characterized in that: The upper cover body (1) is embedded and fixed to the car door panel by the elastic recessed strip (2) on its edge.

6. The automotive interior door handle cover according to claim 1, characterized in that: The wall thickness of the upper cover body (1) is 3mm to 5mm.

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