Terminal housing and manufacturing method thereof, and electronic equipment

Abstract

The present application relates to the technical field of terminal shells, and in particular to a terminal shell and a manufacturing method thereof, and an electronic device. The terminal shell includes a shell body and a coating layer, the shell body forms the main part of the terminal shell, and the coating layer is coated on at least part of the surface of the shell body; the raw material of the shell body includes recycled materials, and the raw material of the coating layer includes bio-based materials, and the ratio of the mass of the bio-based materials to the mass of the recycled materials is greater than or equal to 1:30; the recycled materials include at least one of post-consumer recycled materials or post-industrial recycled materials. The bio-based material has high elasticity and toughness, and it is coated on at least part of the surface of the shell body, which can play a buffering role, thereby improving the overall strength of the terminal shell and improving the anti-drop performance of the terminal shell.

Description

Technical Field

[0001] This application relates to the field of terminal housing technology, and in particular to a terminal housing and its manufacturing method, and electronic devices. Background Technology

[0002] Existing terminal housing designs, to meet strength and drop resistance requirements, primarily utilize high-strength petroleum-based materials such as polycarbonate (PC), thermoplastic polyurethane (TPU), and acrylonitrile butadiene styrene (ABS) to satisfy the equipment's material performance requirements. The waste from non-biodegradable petroleum-based materials causes significant environmental damage, leading to an increasingly negative shift in public perception. To address these changing public attitudes and reduce environmental pollution, various countries have implemented policies aimed at reducing the use and production of single-use petroleum-based materials. Currently, different industries are promoting the use of recycled materials to alleviate the enormous environmental burden imposed by petroleum-based materials.

[0003] Recycled materials include recycled plastics and recycled metals. Recycled plastics, such as post-consumer recycled material (PCR material) or post-industrial recycled material (PIR material), are attracting increasing attention as potentially valuable environmentally friendly recycled materials. PCR material refers to waste plastics generated after circulation, consumption, and use, which are then physically or chemically recycled. PIR material is generated industrially, produced during the manufacturing process itself, and is commonly known as sprue or waste. Plastics undergo disproportionation and cracking reactions during use, leading to a decrease in molecular weight. Impurities are also inevitable during recycling, resulting in lower uniformity than virgin materials. Although numerous modification methods have been developed, their mechanical properties are generally lower than those of petroleum-based materials. Recycled metals face similar issues, making terminal casings made from recycled materials brittle and difficult to widely apply to terminal casings. Summary of the Invention

[0004] This application discloses a terminal housing and its manufacturing method, as well as an electronic device, to solve the problem that existing recycled materials are difficult to apply to terminal housings due to insufficient strength.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] In a first aspect, this application provides a terminal housing, which includes a housing body and a covering layer. The housing body forms the main body of the terminal housing, and the covering layer covers at least a portion of the surface of the housing body. The raw materials of the housing body include recycled materials, and the raw materials of the covering layer include bio-based materials. The mass ratio of the bio-based materials to the recycled materials is greater than or equal to 1:30. The recycled materials include recycled plastics or recycled metals, and the recycled plastics include at least one of post-consumer recycled materials or post-industrial recycled materials.

[0007] Furthermore, the ratio of the sum of the masses of recycled materials and bio-based materials to the total mass of the raw materials for the terminal shell is 60% to 100%, the ratio of the mass of recycled materials to the total mass of the raw materials for the terminal shell is 55% to 95%, and the ratio of the mass of bio-based materials to the total mass of the raw materials for the terminal shell is 5% to 35%.

[0008] Furthermore, the mass percentage of post-consumer recycled materials in recycled plastics is 40% to 100%; post-consumer recycled materials include one or a combination of at least two of the following: polycarbonate post-consumer recycled materials, polypropylene post-consumer recycled materials, polystyrene post-consumer recycled materials, polyethylene terephthalate post-consumer recycled materials, acrylonitrile-butadiene-styrene copolymer post-consumer recycled materials, or polyethylene post-consumer recycled materials.

[0009] Furthermore, the bio-based material is a bio-based polyester thermoplastic polyurethane elastomer, which, by mass parts, includes the following raw materials: 20-40 parts of diisocyanate, 60-80 parts of bio-based polyol, 5-10 parts of bio-based propylene glycol, and 1-5 parts of modifier.

[0010] Furthermore, the covering layer covers the top corners, sides, and / or back of the shell body.

[0011] Furthermore, a sealing surface is provided at the junction of the shell body and the covering layer. The sealing surface is used to make the junction of the shell body and the covering layer smooth. The raw material of the sealing surface is a bio-based material, and the width of the sealing surface is greater than or equal to 0.35 mm.

[0012] Furthermore, the housing body and the covering layer are connected by snap-fit ​​parts, and multiple snap-fit ​​parts are provided between the housing body and the covering layer.

[0013] Furthermore, the snap-fit ​​portion includes a groove on the side of the housing body facing the covering layer and a protrusion on the side of the covering layer facing the housing body, with the protrusion snapping into the groove.

[0014] Secondly, this application provides a method for manufacturing the terminal housing of the first aspect, which is a two-shot injection molding method, comprising the following steps:

[0015] Recycled material is injected into the first injection mold and extruded to form the shell body; the injection pressure of recycled plastic injection molding is 45mpa~60mpa, the injection speed is 5mm / s~25mm / s, the holding pressure is 20~80mpa, and the holding time is 2~3s;

[0016] After the shell body is injection molded, the first injection mold is removed, the shell body is placed in the second injection mold, and bio-based material is injected into the second injection mold. It is then extruded to form a coating layer on the surface of the shell body. The injection pressure of the bio-based material injection molding is 100 MPa to 150 MPa, the injection speed is 50 mm / s to 100 mm / s, the holding pressure is 100 to 150 MPa, and the holding time is 2 to 3 seconds.

[0017] After the coating layer is injection molded, the second injection mold is cooled to obtain the terminal housing.

[0018] Thirdly, this application provides an electronic device, including a display screen, a control circuit board, a battery, and a terminal housing of the first aspect or a terminal housing made using the method of the second aspect, wherein the terminal housing and the display screen form a receiving space, the control circuit board and the battery are disposed in the receiving space, and the battery, the display screen and the control circuit board are electrically connected.

[0019] The beneficial effects of adopting the technical solution of this application are as follows:

[0020] The terminal housing provided in this application includes a housing body and a covering layer. The covering layer covers at least a portion of the surface of the housing body. The raw material of the housing body includes recycled materials, and the raw material of the covering layer includes bio-based materials. The recycled materials include at least one of post-consumer recycled materials or post-industrial recycled materials. Both recycled materials and bio-based materials are environmentally friendly materials. The recycled materials have high hardness and play a role in fixing and supporting internal parts, while the bio-based materials have low hardness and are elastic, which can play a cushioning role in the event of a drop. The mass ratio of bio-based materials to recycled materials is greater than or equal to 1:30 to avoid insufficient bio-based materials, which would limit the protective effect. The covering layer synthesized from bio-based materials covers at least a portion of the surface of the housing body and can play a cushioning role, thereby improving the overall strength of the terminal housing and enhancing its drop resistance. Attached Figure Description

[0021] Figure 1 This is a front view of a terminal housing provided in one embodiment of this application;

[0022] Figure 2 This is a side view of a terminal housing provided in one embodiment of this application;

[0023] Figure 3 A front view of a terminal housing provided in another embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the sealing surface according to one embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the snap-fit ​​portion in one embodiment of this application;

[0026] Figure 6 for Figure 5 A magnified view of a portion at point A shown in the diagram;

[0027] Figure 7 This is a schematic diagram of the snap-fit ​​portion in another embodiment of this application;

[0028] Figure 8 for Figure 7 A magnified view of a portion at point B shown in the diagram;

[0029] Figure 9 for Figure 7 A magnified view of a portion at point C shown in the diagram;

[0030] Figure 10 This is a schematic diagram of the structure of the coating layer in one embodiment of this application;

[0031] Figure 11 for Figure 10 A magnified view of a portion at point C shown in the diagram;

[0032] Figure 12 This is a schematic diagram of the structure of the shell body in one embodiment of this application;

[0033] Figure 13 for Figure 12 A magnified view of a portion at point D shown in the diagram;

[0034] Figure 14 A molecular formula diagram of a diisocyanate provided in one embodiment of this application;

[0035] Figure 15 A molecular formula diagram of bio-based polybutylene succinate provided in one embodiment of this application;

[0036] Figure 16 A flowchart illustrating a method for manufacturing a terminal housing according to one embodiment of this application;

[0037] Figure 17 This is a schematic diagram of the structure of an electronic device in one embodiment of this application;

[0038] Figure 18 for Figure 17 A magnified view of the first border in the middle;

[0039] Figure 19 for Figure 17 A magnified view of the second border in the middle;

[0040] Figure 20 for Figure 17 Enlarged view of the middle cover plate.

[0041] Figure label:

[0042] 1-Electronic device; 10-Terminal housing; 11-First frame; 12-Second frame; 13-Third frame; 14-Rear shell; 15-Cover plate; 20-Display screen; 01-First through hole; 02-Second through hole;

[0043] 100 - Housing body; 200 - Covering layer; 300 - Sealing surface; 400 - Snap-fit ​​part; 410 - Groove; 420 - Protrusion. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] The application scenarios described in this application are for the purpose of more clearly illustrating the technical solutions of this application, and do not constitute a limitation on the technical solutions provided in this application. Those skilled in the art will understand that with the emergence of new application scenarios, the technical solutions provided in this application are also applicable to similar technical problems. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0046] To meet the requirements for material strength and drop resistance, existing terminal housings mostly use high-strength petroleum-based materials to satisfy the equipment's material performance requirements. To alleviate the enormous environmental burden caused by petroleum-based materials, the electronics industry advocates the use of recycled materials to replace them. However, the mechanical properties of recycled materials are generally lower than those of petroleum-based materials, and terminal housings made from recycled materials are fragile, making it difficult to use them extensively in terminal casing manufacturing.

[0047] In view of this, embodiments of this application provide a terminal housing. Figure 1 This is a front view of a terminal housing provided in one embodiment of this application. Figure 2 This is a side view of a terminal housing provided in one embodiment of this application. Figure 3 This is a schematic diagram of the structure of a terminal housing provided in one embodiment of this application, and is also referred to in conjunction with it. Figures 1 to 3The terminal housing 10 includes a housing body 100 and a covering layer 200. The housing body 100 forms the main body of the terminal housing 10, and the covering layer 200 covers at least a portion of the surface of the housing body 100. The raw materials of the housing body 100 include recycled materials, and the raw materials of the covering layer 200 include bio-based materials. The mass ratio of the bio-based materials to the recycled materials is greater than or equal to 1:30. The recycled materials include recycled plastics or recycled metals, and the recycled plastics include at least one of post-consumer recycled materials or post-industrial recycled materials.

[0048] Continue to refer to Figures 1 to 3 The covering layer 200 covers the top corners, sides, and / or back of the shell body 100, so that the covering layer 200 composed of bio-based material at least partially covers the shell body 100 composed of recycled material. The bio-based material has high elasticity and toughness, which can resist impact and prevent the shell body 100 from being directly impacted, thereby improving the overall strength of the terminal shell 10. The covering layer 200 can partially cover the shell body 100, such as covering the top corners, sides, or back of the shell body 100, or it can completely cover the shell body 100.

[0049] Figure 4 This is a front view of the sealing surface 300 in one embodiment of this application, with reference to... Figure 4 A sealing surface 300 is provided at the junction of the housing body 100 and the covering layer 200. The sealing surface 300 is used to ensure a smooth transition at the junction of the housing body 100 and the covering layer 200. The raw material of the sealing surface 300 is a bio-based material, and the width of the sealing surface 300 is greater than or equal to 0.35 mm. The sealing surface 300 can maintain the flatness of the junction between the housing body 100 and the covering layer 200, avoid burrs, and thus improve the aesthetics of the terminal housing 10.

[0050] It should be noted that the thickness of the sealing surface 300 can be adjusted according to appearance requirements. If there are no strict requirements for appearance defects, the terminal housing 10 may not have a sealing surface 300. Furthermore, textured patterns or colored patterns can be designed on the surface of the covering layer 200 or the housing body 100 through methods such as transfer printing or screen printing to further enhance the appearance of the terminal housing 10.

[0051] At the junction of the covering layer 200 and the shell body 100, the bonding force may be insufficient due to the different surfaces of the raw materials of the two, which may lead to delamination during use. Chemical methods can be used to treat the bonding surface, such as by modifying it to increase the bonding force, or by designing patterns on the bonding surface to increase the area of ​​the bonding surface, thereby improving the firmness of the bond between the covering layer 200 and the shell body 100.

[0052] Figure 5This is a schematic diagram of the structure of the snap-fit ​​portion 400 in one embodiment of this application. Figure 6 for Figure 5 A magnified view of a portion at point A shown in the image. Figure 7 This is a schematic diagram of the structure of the snap-fit ​​portion 400 in another embodiment of this application. Figure 8 for Figure 7 A magnified view of a portion at point B shown in the image. Figure 9 for Figure 7 The enlarged view at point C shown in the image is also included. Figures 5 to 9 In order to improve the firmness of the connection between the housing body 100 and the covering layer 200, the housing body 100 and the covering layer 200 are connected by a snap-fit ​​part 400, and multiple snap-fit ​​parts 400 are provided between the housing body 100 and the covering layer 200.

[0053] Continue to refer to Figures 5 to 9 The engaging portion 400 includes a groove 410 on the side of the housing body 100 facing the covering layer 200 and a protrusion 420 on the side of the covering layer 200 facing the housing body 100, with the protrusion 420 engaging within the groove 410. Alternatively, in another optional embodiment, the engaging portion 400 includes a protrusion 420 on the side of the housing body 100 facing the covering layer 200 and a groove 410 on the side of the covering layer 200 facing the housing body 100, with the protrusion 420 engaging within the groove 410. It is understood that the engaging portion 400 between the housing body 100 and the covering layer 200 can be any one of the two embodiments described above, or a combination of the two embodiments.

[0054] Figure 10 This is a schematic diagram of the structure of the covering layer 200 in one embodiment of this application. Figure 11 for Figure 10 A magnified view of a portion at point C shown in the image. Figure 12 This is a schematic diagram of the structure of the housing body 100 in one embodiment of this application. Figure 13 for Figure 12 The enlarged view at point D shown in the figure is also included. Figures 10 to 13 The shape of the groove 410 in the snap-fit ​​portion 400 includes, but is not limited to, a cylindrical groove or a square groove. It is understood that the shape of the groove 410 in the snap-fit ​​portion 400 is not limited in this application; it can be designed specifically according to the thickness of the housing body 100 or the covering layer 200. The design concept of the protrusion 420 in the snap-fit ​​portion 400 is the same as that of the groove 410, and will not be repeated here. The snap-fit ​​portion 400 can enlarge and deepen the mating surface between the housing body 100 and the covering layer 200, which can effectively suppress the separation between the housing body 100 and the covering layer 200, and also effectively delay the erosion of the mating surface between the housing body 100 and the covering layer 200 by the external environment.

[0055] Reference Figure 10The protrusion 420 or the groove 410 can extend in either the x-direction or the y-direction, wherein the x-direction and y-direction are perpendicular to each other. When the protrusion 420 or the groove 410 extends in the x-direction, the engaging portion 400 can significantly improve the connection strength between the housing body 100 and the covering layer 200 in the y-direction. It is understood that the extension direction of the protrusion 420 or the groove 410 can be designed according to the main force direction of the terminal housing 10.

[0056] The specific structure of the terminal housing has been explained above. The raw materials of the terminal housing will be described below.

[0057] The ratio of the mass of bio-based material to the mass of recycled material is greater than or equal to 1:30, preferably 1:10 to 1:30. Typical, but not limited, ratios of bio-based material to recycled material are 1:10, 1:15, 1:20, 1:25, or 1:30. An excessively high proportion of recycled material will result in insufficient elasticity of the terminal shell, while an excessively high proportion of bio-based material will result in insufficient rigidity of the terminal shell, thus providing insufficient support.

[0058] In one embodiment of this application, the ratio of the sum of the mass of the recycled material and the bio-based material to the total mass of the raw materials for the terminal casing is 60% to 100%, and the ratio is typically, but not limited to, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100%.

[0059] The ratio of the mass of recycled materials to the total mass of the raw materials for the terminal casing is 55% to 95%, with examples of this ratio being 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%. The percentage of bio-based materials in the raw materials for the terminal casing is, for example, 5% to 35%. The example of this ratio is 5%, 10%, 15%, 20%, 25%, 30%, or 35%.

[0060] Recycled materials, with their high hardness, serve to fix and support internal components; bio-based materials, with their low hardness and high elasticity, can cushion drops. Too little bio-based material offers limited protection, while too much can negatively impact the fixation of internal components and the overall appearance. Furthermore, when all materials are recycled—meaning the ratio of recycled material mass to the total mass of the raw materials in the terminal casing is 100%—the terminal device is highly susceptible to casing breakage during a drop. The mass ratio of recycled or bio-based materials to the raw materials in the terminal casing is designed according to specific application requirements.

[0061] It is understandable that when recycled materials are recycled plastics, the volume of post-consumer recycled materials is much larger than that of post-industrial recycled materials, and the processing quality of post-industrial recycled materials is superior to that of post-consumer recycled materials. Therefore, from an environmental protection perspective, post-consumer recycled materials are preferred in the manufacture of the terminal casing. In some optional embodiments, the recycled plastic is a post-consumer recycled material, and the mass percentage of post-consumer recycled material in the recycled plastic is 40% to 100%, specifically 40%, 50%, 60%, 70%, 80%, 90%, 99%, or 100%.

[0062] It should be noted that recycled plastics undergo disproportionation and pyrolysis reactions during use, leading to a decrease in molecular weight. Impurities are also inevitable during the recycling process. Therefore, the uniformity of recycled plastics is worse than that of virgin materials. Although numerous modification methods have been developed, their mechanical properties are generally lower than those of virgin materials. Consequently, the higher the proportion of post-consumer recycled materials in recycled plastics, the worse their mechanical properties, and the lower the drop resistance of the resulting terminal casing. To improve the strength of the terminal casing, 10% to 20% by mass of glass fiber can be added to the recycled plastic. Examples of the mass ratio of glass fiber to recycled plastic are 10%, 11%, 12%, 13%, 14%, 15%, 18%, or 20%.

[0063] In some optional embodiments, the post-consumer recycled material includes one or a combination of at least two of the following: polycarbonate (PC), polypropylene (PP), polystyrene (PS), polyethylene glycol terephthalate (PET), acrylonitrile butadiene styrene copolymers (ABS), or polyethylene (PE). Polycarbonate post-consumer recycled materials exhibit high strength, elasticity, toughness, and stability, resulting in terminal shells made from them exhibiting high drop resistance and the ability to withstand strong impacts. In the embodiments of this application, the amount of polycarbonate post-consumer recycled material added is 50%–60%, for example, 50%, 52%, 54%, 56%, 58%, or 60%.

[0064] It should be noted that bio-based materials are obtained through bioconversion from renewable biomass such as grains, straw, and bamboo powder to produce biopolymers or monomers. In some optional embodiments, bio-based materials include bio-based thermoplastic polyurethane (TPU) elastomers and bio-based polyvinyl chloride (PVC). In the terminal shell of this application embodiment, the bio-based material used has a Shore hardness of 85-95 HA, which can provide good impact resistance. Examples of Shore hardness for bio-based materials include 85 HA, 86 HA, 87 HA, 88 HA, 89 HA, 90 HA, 92 HA, 94 HA, or 95 HA. It should be noted that this application does not limit the hardness of the bio-based material; in the manufacturing of the terminal shell, a bio-based material with appropriate hardness can be selected according to actual needs.

[0065] In a preferred embodiment, the bio-based material is TPU. As a thermoplastic elastomer with excellent comprehensive properties, TPU has the advantages of high tensile strength, large elongation, and low long-term compression set. The coating layer prepared using TPU can significantly improve the drop resistance of the terminal shell.

[0066] Figure 14 This is a molecular formula diagram of a diisocyanate provided in one embodiment of this application. Figure 15 Here is a molecular formula diagram of bio-based polybutylene succinate provided in one embodiment of this application, with reference to... Figure 14 and Figure 15 The TPU material is explained in detail below:

[0067] The raw materials for TPU include diisocyanate, bio-based polybutylene succinate, and bio-based propylene glycol (C3H8O2). These raw materials are synthesized in the following mass ratios: 20-40 parts diisocyanate, 60-80 parts bio-based polyol, 5-10 parts bio-based propylene glycol, and 1-5 parts modifier.

[0068] Based on the same inventive concept, embodiments of this application provide a method for manufacturing a terminal housing, which is a two-shot injection molding method. Figure 16 This is a flowchart illustrating a method for manufacturing a terminal housing according to one embodiment of this application, with reference to... Figure 16 The two-shot injection molding method includes the following steps:

[0069] Step A): Inject recycled material into the first injection mold and extrude it to form the shell body; the injection pressure of the recycled plastic injection molding is 45 MPa to 60 MPa, the injection speed is 5 mm / s to 25 mm / s, the holding pressure is 20 to 80 MPa, and the holding time is 2 to 3 seconds.

[0070] The temperature of the barrel used to store recycled plastic is 180℃~280℃, the temperature of the front mold of the first injection mold is 100~150℃, and the temperature of the rear mold of the first injection mold is 50~100℃.

[0071] Step B): After the shell body is injection molded, the first injection mold is removed, the shell body is placed in the second injection mold, and bio-based material is injected into the second injection mold. The material is then extruded to form a coating layer on the surface of the shell body. The injection pressure of the bio-based material is 100 MPa to 150 MPa, the injection speed is 50 mm / s to 100 mm / s, the holding pressure is 100 to 150 MPa, and the holding time is 2 to 3 seconds.

[0072] The temperature of the barrel used to store the bio-based material is 200℃~350℃, the temperature of the front mold of the second injection mold is 100~150℃, and the temperature of the rear mold of the second injection mold is 50~100℃.

[0073] Step C): After the coating layer is injection molded, the second injection mold is cooled to obtain the terminal housing.

[0074] It should be noted that two-shot injection molding is performed on a single injection molding machine, which is programmed to perform two injections within one cycle. The two-shot injection molding method optimizes the polymerization of recycled and bio-based materials while improving production efficiency.

[0075] Based on the same inventive concept, embodiments of this application provide an electronic device. Figure 17 This is a schematic diagram of the structure of an electronic device in one embodiment of this application, with reference to... Figure 17 The electronic device 1 includes a display screen 20, a control circuit board, a battery, and a terminal housing 10 as described in various possible embodiments of this application, or a terminal housing 10 manufactured using the manufacturing method described in the embodiments of this application. The terminal housing 10 and the display screen 20 form a receiving space, and the control circuit board and the battery are disposed within the receiving space. The battery, the display screen 20, and the control circuit board are electrically connected. The terminal housing 10 includes a first frame 11, a second frame 12, a third frame 13, a rear shell 14, and a cover plate 15. The first frame 11 and the second frame 12 are disposed opposite each other, and are connected by the third frame 13, thereby forming a sidewall of the receiving space. The rear shell 14 is disposed on the side of the battery facing away from the display screen 20, and the cover plate 15 is disposed on the side of the rear shell 14 facing away from the battery. The terminal housing 10 is made of recycled materials and bio-based materials. The cover plate 15 is a battery cover, and its synthetic material can be primarily bio-based, as the battery cover does not need to support internal components.

[0076] Figure 18 for Figure 17 Enlarged view of the first border in the middle. Figure 19 for Figure 17 A magnified view of the second border in the middle, see reference. Figure 18 and Figure 19 The first frame 11 is provided with a first through hole 01, and the positioning post passes through the first through hole 01 to connect the first frame 11 and the third frame 13. The second frame 12 is provided with a second through hole 02, and the positioning post passes through the second through hole 02 to connect the second frame 12 and the third frame 13.

[0077] Figure 20 for Figure 17 Enlarged view of the middle cover plate, see reference. Figure 20 The cover plate 15 has a pattern to enhance the aesthetics of the terminal housing.

[0078] Electronic devices include, for example, mobile phones, computers, video recorders, or game consoles.

[0079] The terminal housing in this application will be further described in detail below with reference to specific embodiments and comparative examples.

[0080] Example 1

[0081] This embodiment is a terminal housing, and its manufacturing process includes the following steps:

[0082] Step A): Inject PCR material into the first injection mold and then injection mold it to form the shell body; the injection pressure of the PCR material injection molding is 50 MPa to 53 MPa, the injection speed is 8 mm / s to 16 mm / s, the holding pressure is 35 to 60 MPa, the holding time is 2 s, the barrel temperature is 200℃ to 220℃, the front mold temperature of the first injection mold is 140℃, and the rear mold temperature is 70℃.

[0083] Step C): After the shell body is injection molded, remove the first injection mold, place the shell body in the second injection mold, and inject TPU material into the second injection mold to form a coating layer; the injection pressure of the TPU material injection molding is 115mpa~120mpa, the injection speed is 70mm / s~85mm / s, the holding pressure is 115mpa, the holding time is 2s, the barrel temperature is 290℃~315℃, the front mold temperature of the second injection mold is 120℃, and the rear mold temperature is 70℃;

[0084] Step D): After the coating layer is injection molded, the second injection mold is cooled to obtain the terminal housing.

[0085] The entire unit weighs 260g, with the plastic and soft rubber casing weighing 68g, PCR material weighing 64g, and TPU material weighing 4g. The covering layer is applied to the top corners and sides of the casing.

[0086] Example 2

[0087] Example 2 is a terminal housing. Its specific preparation process can be referred to the preparation process of Example 1. The difference lies in the composition of the raw materials of the terminal housing. The specific composition is listed in Table 1.

[0088] Comparative Examples 1-3

[0089] Comparative Examples 1-3 are terminal housings, and their specific preparation process can be referred to the preparation of Example 1. The difference lies in the composition of the raw materials of the terminal housing, and the specific composition is listed in Table 1.

[0090] Table 1

[0091]

[0092] The terminal casings in Examples 1-2 and Comparative Examples 1-3 were subjected to performance tests, including drop resistance and the bonding strength between soft and hard adhesives. The specific test methods are as follows:

[0093] 1. The following drop test method: only the appearance and structure of the terminal shell are used as test indicators. All tests are whole-machine drop tests on four sides and six corners, and the drop surface is a cement ground.

[0094] I) Room temperature drop test: Room temperature, drop height 2m;

[0095] II) Low-temperature drop test: Before the test, place the equipment in a -15℃ environment for 2 hours and drop it from a height of 1.5m;

[0096] III) Multiple drop test: room temperature, drop height 1.2m, 300 drops.

[0097] The test results for the above test items are listed in Table 2.

[0098] Table 2

[0099] Serial Number Drop Test I Pass Rate Drop Test II Pass Rate Drop Test III Pass Rate Example 1 100％ 100％ 100％ Example 2 90％ 100％ 80％ Comparative Example 1 0％ 0％ 0％ Comparative Example 2 0％ 0％ 0％ Comparative Example 3 30％ 40％ 10％

[0100] 2. Test of bonding strength between soft and hard adhesives. The specific test method is as follows:

[0101] I) Boiling test of the bonding between rigid PCR material and soft TPU material: 60℃ water bath, time 168h;

[0102] II) Immersion test of the binding between hard PCR material and soft TPU material: Immersion in 99% ethanol at room temperature for 168 hours.

[0103] The passing standard for the above tests is that there is no glue separation at the joint between the shell body and the covering layer. Test results for the terminal shell in Example 1: No glue separation occurred after 72 hours if there was no glue separation structure; otherwise, the test passed.

[0104] As can be seen from the comparison data of Example 1 and Comparative Examples 1-3 in Table 2, the pass rate of the three drop tests of the terminal shell in Example 1 is 100%, while the pass rate of the three drop tests of the terminal shell in Comparative Examples 1-2 is zero because no TPU material is used; in Comparative Example 3, the mass ratio of TPU material to PCR material is 1:32, which is less than 1:30, and the pass rate of the drop test of the terminal shell is significantly lower than that of Example 1.

[0105] By comparing the data of Example 1 and Example 2, it can be seen that the mass ratio of TPU material to PCR material in Example 2 is 3:64, which satisfies the ratio of the two to be greater than 1:30. However, the mass ratio of TPU material to the total mass of the terminal shell raw materials is 4%, which is less than 5%. Therefore, the pass rate of the drop test of the terminal shell in Example 2 is lower than that in Example 1.

[0106] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A terminal housing, characterized in that: The terminal comprises a shell body and a coating layer, wherein the shell body forms a main body of the terminal shell, and the coating layer covers at least a part of the surface of the shell body; The raw material of the shell body includes recycled material, the raw material of the coating layer includes bio-based material, and the ratio of the mass of the bio-based material to the mass of the recycled material is greater than or equal to 1:30; The recycled material comprises recycled plastic or recycled metal, wherein the recycled plastic comprises at least one of post-consumer recycled material and post-industrial recycled material; A sealing surface is provided at the junction of the shell body and the coating layer, and the sealing surface is used to make the junction of the shell body and the coating layer smoothly transition; The raw material of the sealing surface is the bio-based material, and the width of the sealing surface is greater than or equal to 0.35 mm.

2. The terminal housing according to claim 1, characterized in that: The ratio of the sum of the mass of the recycled material and the bio-based material to the total mass of the raw materials of the terminal shell is 60% to 100%, the ratio of the mass of the recycled material to the total mass of the raw materials of the terminal shell is 55% to 95%, and the ratio of the mass of the bio-based material to the total mass of the raw materials of the terminal shell is 5% to 35%.

3. The terminal housing according to claim 1, characterized in that: The mass percentage of the post-consumer recycled materials in the recycled plastic is 40% to 100%; The post-consumer recycled materials include one or a combination of at least two of polycarbonate post-consumer recycled materials, polypropylene post-consumer recycled materials, polystyrene post-consumer recycled materials, polyethylene terephthalate post-consumer recycled materials, acrylonitrile-butadiene-styrene copolymer post-consumer recycled materials or polyethylene post-consumer recycled materials.

4. The terminal housing according to claim 3, characterized in that: The bio-based material is a bio-based polyester thermoplastic polyurethane elastomer, and the bio-based polyester thermoplastic polyurethane elastomer includes the following raw materials by weight: 20-40 parts of diisocyanate, 60-80 parts of bio-based polyol, 5-10 parts of bio-based propylene glycol, and 1-5 parts of modifier.

5. The terminal housing according to claim 1, characterized in that: The coating layer coats the top corners, sides and / or back of the shell body.

6. The terminal housing according to any one of claims 1 to 5, characterized in that: The shell body and the covering layer are connected via a clamping portion, and a plurality of the clamping portions are provided between the shell body and the covering layer.

7. The terminal housing according to claim 6, characterized in that: The clamping portion includes a groove provided on a side of the shell body facing the covering layer and a protrusion provided on a side of the covering layer facing the shell body, and the protrusion is clamped in the groove.

8. A method for manufacturing a terminal housing as claimed in any one of claims 1 to 7, characterized in that: The method is a double-shot injection molding method, and the double-shot injection molding method comprises the following steps: Injecting the recycled material into the first injection mold, and performing injection molding to form the shell body; the injection pressure of the recycled plastic injection molding is 45mpa-60mpa, the injection speed is 5mm / s-25mm / s, the holding pressure is 20-80mpa, and the holding time is 2-3s; After the injection molding of the shell body is completed, the first injection mold is taken out, the shell body is placed in a second injection mold, and the bio-based material is injected into the second injection mold to form the coating layer on the surface of the shell body through injection molding; the injection molding of the bio-based material has an injection pressure of 100mpa to 150mpa, an injection speed of 50mm / s to 100mm / s, a holding pressure of 100 to 150mpa, and a holding time of 2 to 3s; After the coating layer is injection-molded, the second injection mold is cooled to obtain the terminal housing.

9. An electronic device, characterized in that: It includes a display screen, a control circuit board, a battery, and a terminal shell as described in any one of claims 1 to 7 or a terminal shell made by the method as described in claim 8, wherein the terminal shell is connected to the display screen to form a storage space, the control circuit board and the battery are arranged in the storage space, and the battery, the display screen and the control circuit board are electrically connected.

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