Impact-resistant layered insulating rubber shell

Abstract

The utility model relates to an anti-impact layered insulating rubber shell, which comprises an upper shell and a lower shell which are buckled with each other, the upper shell and the lower shell respectively comprise a buffer layer, a metal layer and an insulating layer which are sequentially arranged from outside to inside, the buffer layer and the insulating layer are integrally formed with the metal layer through a secondary injection molding process, and the surface of the metal layer is provided with a dovetail groove. The buffer layer is provided with protrusions clamped into the dovetail grooves, the insulating layer is provided with grooves clamped with the backs of the dovetail grooves, external impact energy is absorbed through the buffer layer, the metal layer strengthens structural rigidity and achieves electromagnetic shielding, and the insulating layer ensures electrical isolation safety. The dovetail groove and an inverted buckling interlocking structure formed by a secondary injection molding process remarkably enhance the interlayer binding force, and prevent material layering or displacement caused by impact or temperature change; dynamic pressure resistance and static protection are considered under the synergistic effect of all the layers, assembly gaps are eliminated through the integrated forming design, the overall sealing performance and the environment adaptability are improved, and finally the high-reliability and long-service-life composite protection effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of insulating shell technology, specifically to an impact-resistant layered insulating shell. Background Technology

[0002] In the field of electronic device protection, housing materials must balance mechanical strength, insulation, and resistance to environmental corrosion. However, traditional single-material solutions have significant limitations. While metal housings (such as aluminum alloys and magnesium alloys) possess excellent impact resistance and structural rigidity, their conductivity leads to inherent insulation defects, requiring surface insulating coatings for functional compensation. However, the bonding stability between the coating and the metal substrate is insufficient, making them prone to localized peeling under long-term mechanical friction, temperature changes, or corrosive media (such as salt spray, acid and alkali environments). This not only damages the insulation protection but also accelerates the electrochemical corrosion of the metal substrate, significantly reducing the housing's service life. On the other hand, engineering plastic housings (such as reinforced nylon and polycarbonate) offer stable insulation and corrosion resistance, but their material strength and deformation resistance are limited, making them prone to cracking or even breakage under drop impacts or external extrusion. Existing technologies, while reinforcing rib designs or fiber fillings can partially improve the strength of plastic housings, still fall short of meeting the protection requirements for high loads or frequent mechanical stresses. Furthermore, attempts at composite structures combining metal and plastic (such as a metal skeleton encased in a plastic layer or a plastic matrix embedded with a metal plate) often result in delamination, stress concentration, or localized deformation due to differences in the thermal expansion coefficients of the two materials and insufficient interfacial bonding, ultimately leading to a decline in protective performance. These contradictions indicate that existing technologies have not yet achieved a breakthrough in synergistic material performance and structural reliability, and there is an urgent need to address the challenge of balancing insulation, corrosion resistance, and mechanical strength through innovative design. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an impact-resistant layered insulating shell.

[0004] The purpose of this utility model can be achieved through the following technical solution: An impact-resistant layered insulating shell, comprising an upper shell and a lower shell that interlock with each other. Both the upper and lower shells include a buffer layer, a metal layer and an insulating layer arranged sequentially from the outside to the inside. The buffer layer and the insulating layer are integrally formed with the metal layer through a secondary injection molding process. The surface of the metal layer is provided with a dovetail groove. After the materials of the buffer layer and the insulating layer are melted, they are embedded into the dovetail groove through injection molding to form an inverted interlocking structure.

[0005] Preferably, the surface of the metal layer is stamped with reinforcing ribs.

[0006] Preferably, the reinforcing rib group includes transverse reinforcing ribs and longitudinal reinforcing ribs, which intersect perpendicularly to form a grid-like support structure.

[0007] Preferably, the metal layer has multiple through holes, and the buffer layer and insulating layer are filled in the through holes during injection molding to form columnar connectors.

[0008] Preferably, the outer surface of the buffer layer is provided with a buffer mesh.

[0009] Preferably, the buffer grid is continuously distributed in hexagonal or rhomboid shapes.

[0010] The beneficial effects of this utility model are as follows: the buffer layer absorbs external impact energy, the metal layer strengthens the structural rigidity and achieves electromagnetic shielding, and the insulation layer ensures electrical isolation safety; the dovetail groove and the inverted interlocking structure formed by the secondary injection molding process significantly enhance the interlayer bonding force and prevent material delamination or displacement caused by impact or temperature changes; the synergistic effect of each layer takes into account both dynamic pressure resistance and static protection, the integrated molding design eliminates assembly gaps, improves overall sealing performance and environmental adaptability, and ultimately achieves a high-reliability, long-life composite protection effect, which is suitable for the protection of electrical equipment under complex working conditions. Attached Figure Description

[0011] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of an impact-resistant layered insulating shell according to the present invention.

[0013] Figure 2 This is another structural schematic diagram of an impact-resistant layered insulating shell according to the present invention.

[0014] Figure 3 This is a cross-sectional view of an impact-resistant layered insulating shell according to the present invention.

[0015] Figure 4 This is a schematic diagram of the buffer layer structure of an impact-resistant layered insulating shell according to this utility model.

[0016] Figure 5 This is a schematic diagram of the metal layer structure of an impact-resistant layered insulating shell according to this utility model.

[0017] Figure 6 for Figure 3 A partial schematic diagram of point A in the middle.

[0018] The labels in the figure represent: 1. Upper shell; 2. Lower shell; 3. Buffer layer; 4. Metal layer; 5. Insulation layer; 6. Dovetail groove; 7. Reinforcing rib group; 701. Transverse reinforcing rib; 702. Longitudinal reinforcing rib; 8. Through hole; 9. Columnar connector; 10. Buffer mesh; 11. Protrusion; 12. Groove. Detailed Implementation

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] See Figures 1 to 6 As shown, the structure of this utility model is as follows: an impact-resistant layered insulating shell, including an upper shell 1 and a lower shell 2 that interlock with each other. Both the upper shell 1 and the lower shell 2 include a buffer layer 3, a metal layer 4, and an insulating layer 5 arranged sequentially from the outside to the inside. The buffer layer 3 and the insulating layer 5 are integrally formed with the metal layer 4 through a secondary injection molding process. A dovetail groove 6 is provided on the surface of the metal layer 4. A protrusion 11 that engages with the dovetail groove 6 is provided on the buffer layer 3. A groove 12 that engages with the back of the dovetail groove 6 is provided on the insulating layer 5. Specifically, the buffer layer 3 absorbs external mechanical impacts. The metal layer 4 provides structural support and enhances electromagnetic shielding performance, while the insulating layer 5 blocks the risk of current conduction. The materials of the buffer layer 3 and the insulating layer 5 are melted and then molded with the dovetail groove 6 to form protrusions 11 and grooves 12, forming an inverted interlocking structure. This effectively prevents the peeling between layers due to stress or temperature changes. Its advantages lie in the combination of layered collaborative protection mechanism and physical interlocking design, which takes into account impact resistance, structural stability and electrical safety. At the same time, the one-piece molding process simplifies the assembly process and improves the overall integrity and durability of the product.

[0023] like Figure 2 , Figure 5As shown, the surface of the metal layer 4 is stamped with reinforcing ribs 7. Specifically, the reinforcing ribs 7 stamped on the surface of the metal layer 4 can significantly improve the bending and deformation resistance of the metal layer 4 through its geometric structure, enhancing the overall structural rigidity. At the same time, its textured surface can disperse external impact loads, reduce local stress concentration, and optimize energy transfer paths. In addition, the reinforcing ribs form an anchoring effect with the injection-molded buffer layer 3 and insulating layer 5, further strengthening the interlayer bonding force by increasing the contact area and mechanical interlocking, preventing delamination problems caused by impact or temperature difference deformation. Thus, while maintaining a lightweight design, it also takes into account structural stability and environmental adaptability, ensuring the reliability of the shell for long-term use.

[0024] like Figure 5 As shown, the reinforcing rib group 7 includes transverse reinforcing ribs 701 and longitudinal reinforcing ribs 702, which intersect perpendicularly to form a grid-like support structure. Specifically, through multi-directional intersecting geometric reinforcement design, impact loads in different directions can be evenly distributed, avoiding local stress concentration and significantly improving the overall mechanical properties of the shell in terms of bending, torsion, and deformation resistance. The three-dimensional support system formed by the grid structure can not only enhance the overall rigidity of the metal layer 4, but also form denser mechanical interlocking anchor points with the injection molding material through the concave and convex texture, further suppressing the risk of interlayer delamination. In addition, the orthogonal grid has a multi-directional constraint effect on thermal expansion and contraction or vibration deformation, which can maintain the structural stability of the shell under complex temperature changes or dynamic loads, achieving a balance between lightweight and high durability.

[0025] like Figure 2 , Figure 3 , Figure 5 As shown, multiple through holes 8 are formed on the metal layer 4. During injection molding, the through holes 8 are filled with the materials of the buffer layer 3 and the insulating layer 5 to form columnar connectors 9. Specifically, the columnar connectors 9 significantly enhance the mechanical interlocking strength between the metal and non-metal layers 4, suppressing the risk of interlayer delamination caused by vibration or temperature difference. The columnar structure can not only disperse external impact energy and reduce local stress concentration, but also constrain the thermal expansion and contraction deformation of the metal layer 4 in multiple directions, thereby improving the overall resistance to deformation.

[0026] like Figure 4 As shown, the outer surface of the buffer layer 3 is provided with a buffer grid 10. The buffer grid 10 is continuously distributed in hexagonal or rhomboid shapes. Specifically, the periodic geometric texture of the buffer grid 10 forms a biomimetic mechanical support system through a multi-directionally extending concave-convex structure. It can evenly disperse external impact loads and induce stress to be transmitted in an orderly manner along the grid path, significantly improving energy absorption efficiency and effectively enhancing the anti-slip effect.

[0027] In practical application, the buffer layer 3 absorbs external impact energy and evenly distributes it to the metal layer 4, which in turn provides rigid support to resist deformation. The inverted interlocking structure embedded in the dovetail groove 6 forms a multi-directional mechanical interlock between the metal layer 4, the buffer layer 3, and the insulating layer 5 through the physical anchoring effect after the molten material solidifies, effectively suppressing relative slippage or delamination between layers. The buffer layer 3 buffers instantaneous impact through its own elastic deformation, while the metal layer 4 maintains overall stability through structural rigidity, and the insulating layer 5 blocks the current conduction path. The materials of each layer are seamlessly bonded during secondary injection molding. Through the synergistic effect of gradient stiffness distribution and interlocking, impact stress is dispersed and the interfacial bonding strength is improved, ultimately achieving multiple functions of impact resistance, delamination prevention, and electrical insulation.

[0028] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. An impact-resistant layered insulating shell, characterized in that: The upper shell (1) and lower shell (2) are interlocked. The upper shell (1) and lower shell (2) each include a buffer layer (3), a metal layer (4) and an insulating layer (5) arranged sequentially from the outside to the inside. The buffer layer (3) and the insulating layer (5) are integrally formed with the metal layer (4) through a secondary injection molding process. The surface of the metal layer (4) is provided with a dovetail groove (6). The buffer layer (3) is provided with a protrusion (11) that fits into the dovetail groove (6). The insulating layer (5) is provided with a groove (12) that engages with the back of the dovetail groove (6).

2. The impact-resistant layered insulating shell according to claim 1, characterized in that: The surface of the metal layer (4) is stamped with reinforcing ribs (7).

3. The impact-resistant layered insulating shell according to claim 2, characterized in that: The reinforcing rib group (7) includes transverse reinforcing ribs (701) and longitudinal reinforcing ribs (702), which intersect perpendicularly to form a grid-like support structure.

4. The impact-resistant layered insulating shell according to claim 1, characterized in that: The metal layer (4) has multiple through holes (8), and the buffer layer (3) and the insulating layer (5) are filled in the through holes (8) during injection molding to form columnar connectors (9).

5. The impact-resistant layered insulating shell according to claim 1, characterized in that: The outer surface of the buffer layer (3) is provided with a buffer mesh (10).

6. The impact-resistant layered insulating shell according to claim 5, characterized in that: The buffer grid (10) is distributed in a continuous hexagonal or rhomboid pattern.

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