CN219287562U

CN219287562U - Shell assembly and electronic equipment

Info

Publication number: CN219287562U
Application number: CN202222955805.4U
Authority: CN
Inventors: 管善友; 李春阳
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-06-30
Anticipated expiration: 2032-11-07

Abstract

The application discloses casing subassembly and electronic equipment, casing subassembly include outer subassembly and stratum basale, and outer subassembly includes outer body and is fixed in the decoration of outer body. The outer layer body is internally provided with a fixing hole, one part of the decorating part is fixed in the fixing hole, and the other part of the decorating part protrudes towards the inner surface of the outer layer body. And the base layer is formed on the inner surface of the outer layer body in an injection molding mode, and the base layer is connected with a part of the decorating part protruding out of the inner surface of the outer layer body into a whole through injection molding. The outer surface of the first part does not protrude from the outer surface of the outer layer body, and the inner surface of the second part does not protrude from the inner surface of the base layer. Like this, can form the casing subassembly that has the lamination, and the decoration does not all have gap and section difference with the hookup location of outer body and stratum basale, not only can reduce the whole thickness of casing subassembly, realize frivolously, can also avoid the decoration to drop from the casing, improve casing reliability and high definition.

Description

Shell assembly and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a shell assembly and electronic equipment.

Background

A decorative piece is a component on an electronic device and is typically disposed on a housing of the electronic device. The decoration can play the outward appearance decorative effect, also can play the marking effect, like LOGO, label etc. identification information.

Currently, decorative pieces are often printed directly on the housing or attached to the housing by glue. The mode is extremely easy to occur that the decorating part falls off from the shell, and the reliability is low.

Disclosure of Invention

The application provides a housing assembly and electronic equipment to solve the problem that the decoration easily drops from the shell.

In a first aspect, the present application provides a housing assembly comprising: an outer layer component; the outer layer component comprises an outer layer body and a decoration piece fixed on the outer layer body; the outer layer body comprises a fixing hole, one part of the decorating part is fixed in the fixing hole, and the other part of the decorating part protrudes towards the inner surface of the outer layer body; and the base layer is formed on the inner surface of the outer layer body in an injection molding way, and is connected with the part of the decorating part protruding out of the inner surface of the outer layer body into a whole through injection molding. Like this, can form the casing subassembly that has the lamination, and the decoration does not all have gap and section difference with the hookup location of outer body and stratum basale, not only can reduce the whole thickness of casing subassembly, realize frivolously, can also avoid the decoration to drop from the casing, improve casing reliability and high definition.

In some embodiments of the present application, the decorative piece includes a first portion and a second portion along a thickness direction of the outer layer body (101); the first part is embedded in the fixing hole; the second portion protruding toward the inner surface of the outer layer body; the base layer is integrally connected with the second portion by injection molding. Thus, the binding force between the decoration piece and the outer layer body can be improved.

In some embodiments of the present application, the width of the first portion is smaller than the width of the second portion, so as to form a stepped structure. Like this, can realize the joint of decoration and outer body and stratum basale through trapezium structure, and then can avoid the decoration to drop in the intercommunicating pore that basal lamina and outer body formed.

In some embodiments of the present application, the fixing hole is a through hole; the outer surface of the first part is flush with or lower than the outer surface of the outer layer body, and the joint surface of the first part and the second part is flush with the inner surface of the outer layer body. Therefore, the zero-gap bonding of the decorating part, the basal layer and the outer layer body can be ensured, and the bonding force is better.

In some embodiments of the present application, the injection molded height of the base layer is equal to the height of the second portion; the base layer is integrally connected with the side surface of the second part by injection molding, and the inner surface of the base layer is flush with the inner surface of the second part. Thus, the first decoration structure can be formed, and the first shell component structure is obtained, so that the second part of the decoration can not protrude out of the inner surface of the basal layer, and the whole thickness of the shell component is prevented from being influenced.

In some embodiments of the present application, the injection molded height of the base layer is greater than the height of the second portion; the base layer is also injection molded to the inner surface of the second portion, the base layer being integrally joined to the inner surface and the side surfaces of the second portion by injection molding. Like this, can form the second kind decoration structure, and then obtain second kind shell assembly structure, the second part embedding stratum basale of decoration and by the second part of stratum basale parcel decoration for the second part of decoration can not expose in the internal surface of stratum basale, avoids influencing shell assembly's whole thickness.

In some embodiments of the present application, the decorative piece further includes a third portion, the third portion being located on an inner surface of the second portion, a width of the third portion being smaller than a width of the second member, and the base layer is integrally connected with the third portion and the second portion by injection molding. The injection molding height of the substrate layer is equal to the sum of the height of the second part and the height of the third part; the substrate layer is integrally connected with the inner surface and the side surface of the second part and the side surface of the third part through injection molding; the inner surface of the third portion is flush with the inner surface of the base layer, and the position of the joint surface of the third portion and the second portion relative to the base layer is between the inner surface and the outer surface of the base layer. Like this, wrap up the second part and the third part of decoration by the stratum basale, can form the third kind of decoration, and then obtain the structure of third kind of casing subassembly, the seamless laminating of third kind of decoration and skin body and stratum basale, the cohesion is good, avoids appearing the condition of droing.

In some embodiments of the present application, the housing assembly further comprises a coating; the coating is formed on the inner surface of the outer layer body; the base layer is injection-molded on the surface of the coating layer. In this way, the bonding force between the outer layer body and the base layer can be improved.

In a second aspect, the application provides an electronic device, including a display screen, a middle frame and the housing assembly of the first aspect, the display screen is buckled on one side of the middle frame, and the housing assembly is buckled on the other side of the middle frame.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a conventional electronic device 100;

fig. 2 is a schematic view of a conventional housing 30;

FIG. 3 is a schematic view of a first housing assembly 40 provided in an embodiment of the present application;

FIG. 4 is an exploded schematic view of a first housing assembly 40 provided in an embodiment of the present application;

FIG. 5 is a schematic illustration of a second housing assembly 40 provided in an embodiment of the present application;

FIG. 6 is an exploded schematic view of a second housing assembly 40 provided in an embodiment of the present application;

FIG. 7 is a schematic structural view of a third housing assembly 40 provided in an embodiment of the present application;

FIG. 8 is an exploded schematic view of a third housing assembly 40 provided in an embodiment of the present application;

fig. 9 is a process flow diagram for preparing a housing assembly 40 provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments of the present application, other embodiments that may be obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.

Hereinafter, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

Furthermore, in this application, directional terms "upper", "lower", "left", "right", "top", "bottom", etc. are defined with respect to the orientation in which the components in the drawings are schematically disposed, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarity, and which may be varied accordingly with respect to the orientation in which the components in the drawings are disposed.

The electronic device according to the embodiments of the present application includes, but is not limited to, a mobile phone, a notebook computer, a tablet computer, a laptop computer, a personal digital assistant or a wearable device, a walkman, a radio, a television, a sound box, and the like. Wherein the wearable device includes, but is not limited to, a smart bracelet, a smart watch, a smart head mounted display, smart glasses, and the like. The following description will be made with reference to an electronic device as a mobile phone.

Fig. 1 is a schematic diagram of a conventional electronic device 100.

As shown in fig. 1, the electronic device 100 may include a display screen 10, a middle frame 20 and a housing 30, where the display screen 10, the middle frame 20 and the housing 30 are sequentially fastened together to form a closed cavity, and a circuit board, a battery, a speaker assembly and other devices are disposed in the closed cavity.

The case 30 is a rear case/cover of the electronic device 100, and the case 30 is closer to a circuit board, a battery, etc., and the case 30 needs to have a certain strength to protect the circuit board, the battery, etc.

Fig. 2 is a schematic structural view of a conventional housing 30.

As shown in fig. 2, the housing 30 may include a first material layer 301 and a second material layer 302, where the first material layer 301 is an outer side of the housing 30, and the second material layer 302 is an inner side of the housing 30, that is, the first material layer 301 contacts with a user's hand, and the second material layer 302 contacts with a circuit board, a battery, and the like. The second material layer 302 may be made of plastic or other materials with a certain strength, and the first material layer 301 may be made of Polyurethane (PU) or other materials capable of improving the hand feeling. The first material layer 301 made of PU material can form a leather back cover, which has an attractive appearance and comfortable feel, so that the leather back cover is gradually cradled and loved by consumers in electronic devices such as mobile phones and tablet computers.

The outer surface of the housing 30 is generally provided with a decorative layer 303, where the decorative layer 303 is specifically disposed at any position on the outer surface of the first material layer 301, and the outer surface of the first material layer 301 is the outer surface of the housing 30 of the electronic device 100. The decorative layer 303 may serve both as an appearance decoration and as a logo. Illustratively, the decorative layer 303 may be brand Logo, trademark, or the like.

The housing 30 may also have a single layer structure, and the housing 30 may include a second material layer 302 to provide a rear cover with a certain strength and a low hand feeling. In this case, the decorative layer 303 is disposed on an outer surface of the second material layer 302, and the outer surface of the second material layer 302 is an outer surface of the housing 30 of the electronic device 100. The respective schemes for providing the decorative layer 303 described herein may be applied to the case 30 having a one-layer structure, and may also be applied to the case 30 having a two-layer structure, and the following description will be given by taking the case of applying to the case 30 having a two-layer structure as an example.

Taking the decoration layer 303 as a Logo as an example, the decoration layer 303 is usually arranged on the outer surface of the outer shell 30 by directly printing the Logo on the surface of the product through silk screen printing/pad printing. The silk screen printing/pad printing method has the advantages of high efficiency and simple process, but the finished product has poor texture and no sense of high grade. Or, the monomer Logo is attached to the product in a glue attaching mode. Therefore, the metal touch screen has stronger metal texture and strong metal touch experience, but the fineness is slightly poor, and the risk of falling off exists. Or, directly pass through laser radium carving Logo at the product surface through the mode of radium carving, but this kind of mode is only suitable for the metal surface, is not suitable for the product on PU surface, and lacks the sense of high-grade.

To avoid Logo removal and to enhance the feel and quality of the product surface of the housing 30, embodiments of the present application provide a housing assembly 40, which housing assembly 40 may be the housing 30 described above. In some embodiments, logo may be embedded on the PU surface, and the Logo is fixed between the PU (first material layer 301) and the plastic (second material layer 302) by compression injection molding, so as to achieve an ultra-thin product and form an elegant appearance and a firm combination effect.

Fig. 3 is a schematic structural view of a first housing assembly 40 according to an embodiment of the present application.

As shown in fig. 3, in some embodiments, the housing assembly 40 may include: the outer member and the base layer 102, the base layer 102 is formed by injection molding and secured to the inner surface of the outer member. The outer member is an outer side of the housing member 40, and may include an outer body 101 and a decoration 103, the decoration 103 being fixed to the outer body 101. The outer layer body 101 may be the first material layer 301 described above, and the base layer 102 may be the second material layer 302 described above. The decorative member 103 may refer to the decorative layer 303 as described above in the functional layer, and the structure of the decorative member 103 is different from the decorative layer 303 as described above.

The outer body 101 and the base layer 102 are bonded together to form a housing, which is the base of the housing assembly 40, for forming the base structure of the back cover. The outer body 101 is the outside of the housing and the base layer 102 is the inside of the housing, and illustratively, the outer body 101 is touched by a user when using the electronic device 100 and the base layer 102 is in contact with the internal components (circuit board, battery and speaker assembly) of the electronic device 100.

Fig. 4 is an exploded schematic view of a first housing assembly 40 provided in an embodiment of the present application.

As shown in fig. 4, in some embodiments, the decorative piece 103 may be secured in an inlaid manner in the outer layer body 101. In order to facilitate the fixing of the decoration 103 in a mosaic manner, fixing holes 1011 are provided in the outer layer body 101.

A part of the decoration 103 is fixed in the fixing hole 1011 to be embedded in the outer layer body 101, and another part of the decoration 103 protrudes toward the inner surface 101b of the outer layer body 101. The outer surface 101a of the outer layer body 101 is the outer surface of the housing, i.e., the surface in contact with the user's hand; the inner surface 101b of the outer layer body 101 is a surface that cannot be contacted by the hand of the user. It is to be appreciated that the outer surfaces described herein may be based on a direction away from an internal device in the electronic device 100 and the inner surfaces may be based on a direction toward the internal device.

The base layer 102 is formed on the inner surface 101b of the outer layer body 101 by injection molding, and the base layer 102 is integrally connected to a portion of the garnish 103 protruding from the inner surface of the outer layer body 101 by injection molding. Thus, the effect of embedding the decorative member 103 into the outer layer body 101 and the base layer 102 can be achieved, and the joint between the decorative member 103 and the outer layer body 101 and the base layer 102 is free from gaps and step differences, so that the overall thickness of the housing assembly 40 is reduced, the binding force is improved, and the light and thin rear cover is achieved.

In some embodiments, the decorative piece 103 includes a first portion 1031 and a second portion 1032 along a thickness direction of the outer layer body 101. The first portion 1031 is embedded into the fixing hole 1011, the width of the fixing hole 1011 is smaller than or equal to the width of the first portion 1031 of the decoration 103, the outer layer body 101 has certain flexibility when PU material is adopted, and an assembly gap with the decoration 103 is not required to be reserved when the fixing hole 1011 is cut on PU, so that the first portion 1031 can be fixed in zero gap contact with the outer layer body 101, the binding force is strong, and falling is prevented. The second portion 1032 protrudes toward the inner surface 101b of the outer layer body 101, and the base layer 102 is integrally connected to the second portion 1032 by injection molding. Thus, seamless combination of the decoration 103, the outer layer body 101 and the basal layer 102 can be realized, no level difference exists, and falling-off is avoided.

The first portion 1031 is an outer portion of the trim piece 103 and the second portion 1032 is an inner portion of the trim piece 103, which is understood to mean that the outer surface of the trim piece 103 is the outer surface 1031a of the first portion 1031 and the inner surface of the trim piece 103 is the inner surface 1032b of the second portion 1032.

The first portion 1031 and the second portion 1032 may be integrally formed or may be formed separately and then joined together. The width of the first portion 1031 is less than or equal to the width of the second portion 1032, and different fixing effects can be achieved by using different width setting rules. Referring to fig. 3 and 4, the width W of the first portion 1031 ₁₀₃₁ Less than or equal to the width W of the second portion 1032 ₁₀₃₂ 。

Illustratively, where the width of the first portion 1031 is less than the width of the second portion 1032, the decorative element 103 formed by the first portion 1031 and the second portion 1032 is in a stepped configuration. When the width of the first portion 1031 is equal to the width of the second portion 1032, the first portion 1031 and the second portion 1032 form the decorative element 103 having a rectangular cross-section.

When the decoration 103 is in a step-shaped structure, the connection between the decoration 103 and the outer layer body 101 is realized through the combination of the second part 1032 and the inner surface 101b of the outer layer body 101, so that the stability of the decoration 103 inlaid in the outer layer body 101 can be further improved, the decoration 103 is further prevented from falling off from the outer layer body 101 and the substrate layer 102, and the combination strength is improved.

The outer surface 101a of the outer body 101 is the outer surface of the case assembly 40, and the outer surface 1031a of the decorative member 103 is exposed from the outer surface of the outer body 101, and then the fixing holes 1011 penetrate the inner and outer surfaces (101 a, 101 b) of the outer body 101, that is, the fixing holes 1011 are through holes. When the first portion 1031 of the decoration 103 is inserted into the fixing hole 1011, the outer surface 1031a of the first portion 1031 is exposed from the outer layer body 101 so as to be easily seen by a user. The outer surface 1031a of the first portion 1031 is exposed from the outer layer body 101 but does not protrude from the outer surface 101a of the outer layer body 101, so that the overall thickness of the housing assembly 40 is not affected, that is, the housing assembly 40 is light and thin.

Height H of first portion 1031 ₁₀₃₁ Less than or equal to the height H of the outer layer body 101 ₁₀₁ Height H of the outer layer body 101 ₁₀₁ Equal to the height H of the fixed hole 1011 ₁₀₁₁ . Illustratively, at a height H of the first portion 1031 ₁₀₃₁ Equal to the height H of the outer layer body 101 ₁₀₁ When the outer surface 1031a of the first portion 1031 is flush with the outer surface 101a of the outer layer body 101. At a height H of the first portion 1031 ₁₀₃₁ Less than the height H of the outer layer body 101 ₁₀₁ When the outer surface 1031a of the first portion 1031 is lower than the outer surface 101a of the outer layer body 101. Where height is understood to be part of the thickness.

The outer surface 101a of the outer layer body 101 is distal from the base layer 102 and the inner surface 101b of the outer layer body 101 is proximal to the base layer 102. The inner surface of the first portion 1031 is flush with the inner surface 101b of the outer body 101 and the interface of the first portion 1031 and the second portion 1032 is flush with the outer surface of the second portion 1032. Thus, the base layer 102 and the outer layer body 101 can be ensured to be seamlessly combined with the decoration 103, gaps and section differences are avoided, and the binding force is improved.

When the inner surface 101b of the outer layer body 101 is injection molded to form the base layer 102, the inner surface 101b of the outer layer body 101 is raised by the second portion 1032 of the decorative element 103, and then the base layer 102 may include the side surface 102a, the inner surface 102b, and the outer surface 102c. The outer surface 102c of the base layer 102 is seamlessly joined to the inner surface 101b of the outer layer body 101, and the side surface 102a of the base layer 102 is seamlessly joined to the side surface 1032a of the second portion 1032. In the first housing assembly 40, the height H of the second portion 1032 ₁₀₃₂ Equal to injection height H of base layer 102 ₁₀₂ The inner surface 1032b of the second portion 1032 is opposite the inner surface 10 of the substrate layer 1022b are flush. This allows the substrate layer 102 to be integrally formed with the side surface 1032a of the second portion 1032 in an adjacent manner by injection molding, with good bonding.

The outer surface 1032b of the second portion 1032 does not protrude from the inner surface 102b of the substrate layer 102, so that the overall thickness of the housing assembly 40 is not affected, i.e., the housing assembly 40 is light and thin. At the same time, the protruding second portion 1032 prevents the internal components of the electronic device 100 from being affected, such as the battery.

Illustratively, the height H of the outer body 101 ₁₀₁ May be 0.2-0.5mm, and may be 0.2mm, 0.25mm, 0.3mm, etc. Injection molding height H of base layer 102 ₁₀₂ Can be more than or equal to 0.4mm. At the height H of the outer layer body 101 ₁₀₁ At 0.3mm, the overall thickness of the housing assembly 40 may be ≡0.7mm. At the height H of the outer layer body 101 ₁₀₁ Injection height H of base layer 102 of 0.3mm ₁₀₂ At 0.4mm, the height H of the fixing hole 1011 ₁₀₁₁ Height H of first portion 1031 of trim piece 103 is 0.3mm ₁₀₃₁ Height H of the second portion 1032 is less than or equal to 0.3mm ₁₀₃₂ ≤0.4mm。

In the first housing component 40 provided in this embodiment, the fixing hole 1011 is formed in the outer layer body 101, the first portion 1031 of the decoration 103 is embedded into the outer layer body 101 through the fixing hole 1011, and the second portion 1032 protrudes toward the inner surface 101b of the outer layer body 101. The base layer 102 is injection-molded on the inner surface of the outer layer body 101, and the base layer 102 is integrally connected to the second portion 1032 by injection molding. The outer surface 1031a of the first portion 1031 does not protrude from the outer surface 101a of the outer layer body 101, and the inner surface 1032b of the second portion 1032 does not protrude from the inner surface 102b of the base layer 102. Thus, the housing assembly 40 having a laminated structure can be formed, and the joint positions of the decoration member 103, the outer layer body 101 and the base layer 102 do not have gaps or step differences, so that the overall thickness of the housing assembly 40 can be reduced, the thickness can be reduced, the decoration member 103 can be prevented from falling off from the housing, and the reliability and the high definition of the housing can be improved.

Fig. 5 is a schematic structural view of a second housing assembly 40 according to an embodiment of the present application.

In some embodiments, as shown in fig. 5, the second housing component 40 is different from the first housing component 40 in the structure of the decoration 103 and the related structural content, and the rest of the structural content can refer to the content of the first housing component 40, which is not described herein.

In the second housing assembly 40, taking the example where the ornamental piece 103 is still stepped in cross-section, the second ornamental piece 103 may include a first portion 1031 and a second portion 1032, with the second portion 1032 having a height that is less than the first portion 1032. Thus, when the inner surface 1032b of the second portion 1032 of the second housing component 40 is formed into the substrate layer 102 by injection molding, the second portion 1032 does not extend through the substrate layer 102 and does not protrude from the substrate layer 102, thereby forming a second laminated structure.

The second portion 1032 of the second decorative element 103 has a height H at which the structure of the base layer 102 is also retained between the inner surface 1032b of the second portion 1032 and the inner surface 102b of the base layer 102 ₁₀₃₂ Less than injection molding height H of base layer 102 ₁₀₂ . Exemplary, height H of second portion 1032 ₁₀₃₂ Injection height H, which may be base layer 102 ₁₀₂ Half of (a) is provided. Injection molding height H at base layer 102 ₁₀₂ The height H of the second portion 1032 is unchanged, i.e. not less than 0.4mm ₁₀₃₂ Can be more than or equal to 0.2mm.

In some embodiments, to form the laminate structure described above, the injection molded height of the base layer 102 in the second housing component 40 may be adaptively increased while maintaining the height of the second housing component 40 and the second portion 1032 of the trim piece 103 in the first housing component 40. Exemplary, at height H of second portion 1032 of decorative element 103 ₁₀₃₂ Still at 0.4mm or more, the injection height H of the base layer 102 in the second housing component 40 ₁₀₂ Can be more than or equal to 0.5mm.

Fig. 6 is an exploded view of a second housing assembly 40 provided in an embodiment of the present application.

As shown in fig. 6, in some embodiments, to accommodate the laminated structure of the second decorative piece 103, upon injection molding the base layer 102 to the inner surface 101b of the outer layer body 101,the base layer 102 is also injection molded to the inner surface 1032b of the second portion 1032. The base layer 102 is integrally joined to the inner surface 1032b and the side surface 1032a of the second portion 1032 by injection molding, respectively, without a gap. Referring to fig. 5, the vertical distance between the inner surface 1032b of the second portion 1032 and the inner surface 102b of the substrate layer 102 is a first distance L ₁ The position of the inner surface 1032b of the second portion 1032 of the second decorative element 103 relative to the substrate layer 102 is between the inner and outer surfaces (102 b, 102 c) of the substrate layer 102. In this way, the base layer 102 can be integrally formed with the second portion 1032 in a wrapped form by injection molding, and a good bonding force can be achieved.

First distance L ₁ May be based on injection molding height H of base layer 102 ₁₀₂ And the height H of the second portion 1032 in the second trim piece 103 ₁₀₃₂ And on the contrary. At a height H where the base layer 102 is maintained ₁₀₂ Unchanged height H of the second portion 1032 ₁₀₃₂ Becomes smaller by a first distance L ₁ The same applies. Thus, zero-gap bonding between the decorative element 103 and the base layer 102 can be ensured, and the bonding force is good. Exemplary, height H of second portion 1032 in second trim 103 ₁₀₃₂ At 0.2mm, a first distance L ₁ Is 0.2mm.

In the second housing component 40 provided in this embodiment, the second decoration member 103 is embedded in the outer layer body 101 and the substrate layer 102, but the inner surface 1032b is not exposed by the substrate layer 102, and the outer surface 1031a of the second decoration member 103 is exposed by the outer surface 101a of the outer layer body 101 but not protruding, so that the overall thickness of the second housing component 40 having the second laminated structure is not affected, and light and thin can be achieved. Meanwhile, zero gap lamination is adopted between the decoration 103 and the substrate layer 102 and between the decoration 103 and the outer layer body 101, so that gaps and section differences do not exist at the combination positions, the decoration 103 is prevented from falling off from the shell, and the reliability and high definition of the shell are improved.

Fig. 7 is a schematic structural view of a third housing assembly 40 according to an embodiment of the present application.

In some embodiments, as shown in fig. 7, the third housing component 40 is different from the first housing component 40 and the second housing component 40 in the structure of the decoration member 103 and the related structural content, and the rest of the structural content can refer to the content of the first housing component 40 and the second housing component 40, which is not repeated herein. The embodiment of the present application is modified based on the structure of the second housing component 40, and a third housing component 40 is described as an example.

In the third housing assembly 40, taking the example where the trim piece 103 is still stepped in cross-section, the third trim piece 103 may include a first portion 1031, a second portion 1032, and a third portion 1033. The first portion 1031 is located on an outer surface of the second portion 1032 and the third portion 1033 is located on an inner surface of the second portion 1032.

Injection molding height H of base layer 102 ₁₀₂ Equal to the height H of the second portion 1032 ₁₀₃₂ And height H of the third portion 1033 ₁₀₃₃ And (3) summing. The third portion 1033 and the second portion 1032 each protrude from the inner surface 101b of the outer layer body 101, and the base layer 102 is integrally connected with the third portion 1033 and the second portion 1032 by injection molding. The outer surface of the trim piece 103 is the outer surface 1031a of the first portion 1031 and the inner surface of the trim piece 103 is the inner surface 1033b of the third portion 1033.

The first portion 1031 and the second portion 1032 form a downward stepped structure, and the second portion 1032 and the third portion 1033 form an upward stepped structure, so that the housing assembly 40 can counteract the forces in the inner and outer directions when the housing assembly is subjected to an external force, and the decorative element 103 is fixedly clamped in the outer layer body 101 and the substrate layer 102, so as to prevent the decorative element from falling off.

The third portion 1033 may have a smaller width than either of the first portion 1031 and the second portion 1032 to accommodate a limited interior space of the substrate layer 102. The width of the third portion 1033 may be equal to or greater than either of the first portion 1031 and the second portion 1032 if the interior space of the base layer 102 is not limited.

Illustratively, the width W of the first portion 1031 ₁₀₃₁ Less than the width W of the second portion 1032 ₁₀₃₂ Width W of third portion 1033 ₁₀₃₃ Less than the width W of the first portion 1031 ₁₀₃₁ 。

Fig. 8 is an exploded view of a third housing assembly 40 provided in an embodiment of the present application.

As shown in fig. 8, in some embodiments, to accommodate the laminated structure of the third decorative piece 103, the base layer 102 is integrally joined to the inner surface 1032b and the side surfaces 1032a of the second portion 1032 and the side surfaces 1033a of the third portion 1033 by injection molding while the base layer 102 is injection molded to the inner surface 101b of the outer layer body 101. The vertical distance between the inner surface 1032b of the second portion 1032 and the inner surface 102b of the substrate layer 102 is a first distance L ₁ . In this way, the substrate layer 102 can be integrally formed with the second portion 1032 and the third portion 1033 in a wrapped form by injection molding, and a bonding force can be obtained.

The first portion 1031 of the third type decoration 103 is inserted into the fixing hole 1011 and the outer layer body 101, and the base layer 102 is formed on the exposed surface of the second portion 1032 and the exposed surface of the third portion 1033 by injection molding, so that the second portion 1032 and the third portion 1033 of the third type decoration 103 are inserted into the base layer 102 to form a third type laminated structure. Height H of second portion 1032 of trim piece 103 ₁₀₃₂ Height H with third portion 1033 ₁₀₃₃ May be the same or different.

Illustratively, at the injection molding height H of the base layer 102, taking the same example ₁₀₂ At 0.4mm, the height H of the second portion 1032 of the third trim element 103 ₁₀₃₂ Height H of the third portion 1033 is 0.2mm ₁₀₃₃ Is 0.2mm and the first distance is 0.2mm.

The bonding surfaces of the first portion 1031 and the second portion 1032 of the third decorative element 103 are flush with the inner surface 101b of the outer layer body 101, and the outer surface 1031a of the first portion 1031 is exposed from the outer surface 101a of the outer layer body 101 but does not protrude from the outer surface 101a of the outer layer body 101; the inner surface 1033b of the third portion 1033 is flush with the inner surface 102b of the substrate layer 102 or does not protrude from the inner surface 102b of the substrate layer 102, and the location of the engagement surface of the third portion 1033 and the second portion 1032 relative to the substrate layer 102 is between the inner and outer surfaces (102 a, 102 b) of the substrate layer 102. In this way, the third decoration 103 can be bonded with the outer layer body 101 and the substrate layer 102 in a seamless manner, and the bonding force is better.

The third housing component 40 provided in this embodiment of the present application embeds the third decoration 103 into the outer layer body 101 and the base layer 102 by injection molding, the first portion 1031 of the third decoration 103 is embedded into the outer layer body 101 and is exposed from the outer surface 101a but does not protrude, the second portion 1032 is embedded into the portion of the base layer 102 near the outer side, and the third portion 1033 is embedded into the portion of the base layer 102 near the inner side and protrudes from the inner surface 102b of the base layer 102. In this way, it is possible to ensure that the entire thickness of the third case assembly 40 having the third laminated structure is not affected and light and thin. Meanwhile, zero gap lamination is adopted between the decoration 103 and the substrate layer 102 and between the decoration 103 and the outer layer body 101, so that gaps and section differences do not exist at the combination positions, the decoration 103 is prevented from falling off from the shell, and the reliability and high definition of the shell are improved.

In some embodiments, to increase the bond strength of outer layer body 101 to substrate layer 102, housing assembly 40 further includes a coating 105, based on housing assembly 40 provided in any of the previous embodiments. The coating layer 105 is coated on the inner surface 101b of the outer layer body 101, and the base layer 102 is injection-molded on the surface of the coating layer 105, so that the outer layer body 101 and the base layer 102 are closely attached by the coating layer 105.

The coating 105 may be a high temperature resistant glue so as to be suitable for use in a high temperature (about 300 ℃) injection molding environment, improving the bond strength of the outer layer body 101 and the substrate layer 102.

In some embodiments, the present embodiments also provide a process for preparing the housing assembly 40 provided in any of the foregoing embodiments, to provide a housing assembly 40 that is strong in bonding force, free of height differences, free of pre-formed interlayer thickness (height to accommodate the second portion 1032 and/or the third portion 1033), free of gaps, and thinner.

As shown in fig. 9 (1), in the first step, a trimming process is performed. The outer layer body 101 is fed, and the outer layer body 101 is processed into the shape and the positioning hole required by injection molding through a punching and cutting process.

The outer layer body 101 can be made of one or more layers of composite materials of TPU substrate and outer PU material, so as to meet the requirements of hand feeling, strength and the like. The thickness of the outer layer body 101 is typically 0.2-0.5mm, optionally 0.3mm. The cutting can use laser or a cutting jig, and the external dimension of the cutting is expanded by 10-50mm according to the dimension of the product. The positioning holes are positioned in the waste material area outside the outline of the product (the outer layer body 101), the aperture is 2-10mm, the tolerance is within +/-0.10 mm, and 4-8 positioning holes are uniformly distributed. The positioning holes are used for fixing the outer layer body 101, so that the outer layer body 101 cannot deform and displace due to external force when the subsequent process is carried out, and the quality of the prepared shell assembly 40 is ensured.

As shown in fig. 9 (2), in the second step, a high temperature resistant coating process. After PU is cut, a high temperature resistant coating 105 is coated on the combined surface of the outer layer body 101 and the injection molding plastic layer, so that the outer layer body 101 is prevented from being deformed due to high temperature in the injection molding process.

The injection molding plastic layer is the substrate layer 102, and the high temperature resistant coating 105 is coated on the joint surface of the outer layer body 101 and the substrate layer 102, wherein the high temperature resistant coating needs to resist the instantaneous high temperature of 280-300 ℃. Meanwhile, according to the types of PU (used for forming the outer layer body 101) and injection molding plastic (used for forming the base layer 102), the components of the coating 105 are adjusted to have good affinity with the base material, so that the binding force after injection molding is increased.

As shown in fig. 9 (3), in the third step, a hole punching process is performed. After the high-temperature coating is finished, the Logo hole on the outer layer body 101 is punched and formed by using a punching jig.

The fixing hole 1011 is formed in the outer layer body 101 by punching based on the size of the first portion 1031 of the decoration 103. The shape of the fixing hole 1011 can be punched out by using a laser or a punching jig as the shape cutting. Because PU has certain flexibility, the fixed hole 1011 cut out on PU need not reserve the fit clearance with Logo.

As shown in fig. 9 (4), in the fourth step, the garnish attaching process. After the fixing hole 1011 on the outer layer body 101 is formed, the first portion 1031 of the decoration 103 is passed through the fixing hole 1011. The outer surface of the second portion 1032 is attached to the outer layer body 101, the second portion 1032 protrudes from the inner surface 101b of the outer layer body 101, and the second portion 1032 has the coating 105 attached to the outer layer body 101.

In order to avoid the position movement of the Logo under the impact force of plastic in the injection molding process, the Logo is pressed and fixed by a front mold cavity and a rear mold cavity, and the total thickness of the Logo is equal to the thickness of the PU layer and the thickness of the substrate layer; the Logo is designed with steps in the thickness direction, and glue can be coated on the steps for pre-fixing.

The structure of the decoration 103 may be any one of those provided in the above embodiments, and the material of the decoration 103 may be metal, plastic, or the like. The surface treatment is used, and the use is flexible and changeable.

As shown in fig. 9 (5), in a fifth step, the injection molding process is compressed. After the PU precursor process is finished, the PU precursor is placed into a mold cavity, and compression injection molding is started, that is, the inner surface of the outer layer body 101 is injection molded to form the base layer 102, and the base layer 102 is integrally connected with the second portion 1032 and/or the third portion 1033 of the decorative element 103 through injection molding. Through injection molding process, can make plastic substrate (stratum basale 102) and Logo (decoration 103) have good combination, avoid the risk that Logo drops. Meanwhile, the surface of the outer layer body 101 and the surface of the decorating part 103 are extruded to be flush with the die surface at the same time by the large injection pressure during injection molding, so that the assembly level difference of the surface of the outer layer body 101 and the surface of the decorating part 103 is reduced or even eliminated, and better appearance fineness is realized. The compression injection molding process is used to make the overall thickness of the molded housing assembly 40 thinner, so as to meet the demand of the electronic products for lightness and thinness. In other embodiments, this step may be performed using conventional injection molding.

Illustratively, after the PU preamble procedure is finished, the cut PU positioning holes are aligned with positioning columns on the mold, placed in the mold cavity, and compression injection molding is started. If the base layer 102 and the decoration 103 are made of plastic, the base layer 102 and the decoration 103 are combined together by fusing after injection molding. If the decoration 103 is made of metal, the plastic substrate 102 and the metal decoration 103 can be tightly combined by processing a rough surface on the metal side wall, so that the decoration 103 is prevented from falling off. At the same time, injection molding height H of plastic substrate layer 102 ₁₀₂ Depending on the product requirements, to meet the structural requirements of the housing assembly 40 shown in any one of fig. 3, 5 and 7. To facilitate the rapidity ofAnd (3) quick production, wherein the die positioning column and the PU positioning hole can be in clearance fit, and the diameter of the positioning column is 0.1-0.2mm smaller than that of the PU positioning hole. The plastic substrate for injection molding uses conventional engineering plastics and its modified products, and combines product strength and production convenience, and an exemplary plastic substrate may be Polycarbonate (PC) with 20% Glass Fiber (GF), i.e., pc+20% GF. The material temperature during injection molding is set to be lower than the instantaneous high temperature that can be tolerated by the high temperature resistant coating 105, and may be set to 300 ℃ or lower, for example. The mold temperature during injection molding can be set to be lower in the front mold (recommended 60-80 ℃) and higher in the rear mold (recommended 80-120 ℃) according to different deformation degrees of products; the cooling time is prolonged as much as possible while the production economy is ensured.

After injection molding, the embedded decorative piece 103 is tightly combined with the outer layer body 101, is tightly combined with the injection molding plastic substrate layer 102, has a binding force far greater than that of a hot pressing or other common bonding modes, greatly reduces the reliability risks of falling off and the like, and has better appearance fineness.

Sixth, the computer digitally controls (computerized numerical control, CNC) the machining process. After injection molding, the outer layer body 101+trim 103+base layer 102 molding is placed on a CNC fixture and machined to a predetermined shape, such as the shape of the housing assembly 40 shown in any one of FIGS. 3, 5 and 7. In the actual implementation process, the first, second and third steps can be sequentially adjusted according to the actual process conditions.

Illustratively, after injection molding is complete, the excess injection molded features need to be removed by post-processing. The PU + Logo + substrate form is placed on a CNC fixture, the program and tool are adjusted, and machined to a predetermined shape to provide the housing assembly 40. Because the injection molding part comprises soft PU (outer layer body 101) and hard plastic (basal layer 102), CNC processing needs to verify and select proper cutters and processing parameters, and more burrs and size fluctuation are avoided.

In some embodiments, after the above six steps are completed, the CNC-finished product may be oiled and inspected for appearance in order to further improve the product quality and feel. After all inspection passes, a satisfactory housing assembly 40 is obtained.

In some embodiments, the materials selected for the outer layer body 101, the decorative piece 103, and the base layer 102 include, but are not limited to, the following six combinations: (1) outer layer body 101: a metal material; decoration 103: pu+thermoplastic polyurethane elastomer rubber (thermoplastic polyurethanes, TPU) base composite; base layer 102: PC and PC-based composite materials. (2) outer layer body 101: a metal material; decoration 103: pu+tpu substrate composite; base layer 102: polyamide fiber (PA) and PA-based composites. (3) outer layer body 101: a metal material; decoration 103: pu+tpu substrate composite; base layer 102: ABS plastic and ABS-based composite material. (4) outer layer body 101: a plastic material; decoration 103: pu+tpu substrate composite; base layer 102: PC and PC-based composite materials. (5) outer layer body 101: a plastic material; decoration 103: pu+tpu substrate composite; base layer 102: PA and PA-based composites. (6) outer layer body 101: a plastic material; decoration 103: pu+tpu substrate composite; base layer 102: ABS plastic and ABS-based composite material.

According to the technical method for preparing the shell component 40, the laminated structure of PU material, common engineering plastic and embedded Logo is used, and the pursuit of high reliability (risk of Logo falling off avoidance), high definition and light and thin design of the shell component 40 is realized through the technical processes of PU cutting, PU high-temperature resistant coating, PU punching, logo hole punching, logo attaching, compression injection molding, CNC appearance and the like. In the aspect of realizing the thinning of the rear cover, compared with the common injection molding and PU veneer, the thickness is thinned by 30-40%, and the better appearance integrated effect is realized.

It is noted that other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A housing assembly, comprising:

an outer layer component; the outer layer component comprises an outer layer body (101) and a decoration (103) fixed on the outer layer body (101); the outer layer body (101) comprises a fixing hole (1011), one part of the decorating part (103) is fixed in the fixing hole (1011), and the other part of the decorating part protrudes towards the inner surface (101 b) of the outer layer body (101);

and a base layer (102) injection-molded on the inner surface of the outer layer body (101), wherein the base layer (102) is integrally connected with the part of the decoration (103) protruding from the inner surface of the outer layer body (101) through injection molding.

2. The housing assembly according to claim 1, wherein the ornamental piece (103) comprises a first portion (1031) and a second portion (1032) in a thickness direction of the outer layer body (101); the first portion (1031) is embedded in the fixing hole (1011); the second portion (1032) projects toward the inner surface (101 b) of the outer layer body (101); the base layer (102) is integrally connected to the second portion (1032) by injection molding.

3. The housing assembly according to claim 2, wherein the first portion (1031) has a smaller width than the second portion (1032) forming a stepped configuration.

4. A housing assembly according to claim 3, wherein the fixing hole (1011) is a through hole;

the outer surface (1031 a) of the first portion (1031) is flush with or lower than the outer surface (101 a) of the outer layer body (101), and the junction surface of the first portion (1031) and the second portion (1032) is flush with the inner surface (101 b) of the outer layer body (101).

5. The housing assembly according to claim 4, wherein the injection molded height of the base layer (102) is equal to the height of the second portion (1032);

the base layer (102) is integrally connected to a side surface (1032 a) of the second portion (1032) by injection molding, and an inner surface (102 b) of the base layer (102) is flush with an inner surface (1032 b) of the second portion (1032).

6. The housing assembly according to claim 4, wherein the injection molded height of the base layer (102) is greater than the height of the second portion (1032);

the base layer (102) is also injection molded to an inner surface (1032 b) of the second portion (1032), the base layer (102) being integrally joined to the inner surface (1032 b) and the side surfaces (1032 a) of the second portion (1032) by injection molding.

7. The housing assembly of claim 4, wherein the trim piece (103) further comprises a third portion (1033), the third portion (1033) being located on an inner surface (1032 b) of the second portion (1032), a width of the third portion (1033) being smaller than a width of the second portion (1032), the base layer (102) being integrally connected to the third portion (1033) and the second portion (1032) by injection molding.

8. The housing assembly according to claim 7, wherein the injection molded height of the base layer (102) is equal to the sum of the height of the second portion (1032) and the height of the third portion (1033);

-the base layer (102) is integrally connected to the inner surface (1032 b) and the side surface (1032 a) of the second portion (1032) and to the side surface (1033 a) of the third portion (1033) by injection moulding;

an inner surface (1033 b) of the third portion (1033) is flush with an inner surface (102 b) of the base layer (102), and a width of the third portion (1033) is less than or equal to a width of the first portion (1031).

9. The housing assembly according to claim 1, further comprising a coating (105);

the coating (105) is formed on the inner surface of the outer layer body (101);

the base layer (102) is injection-molded on the surface of the coating layer (105).

10. An electronic device, characterized by comprising a display screen (10), a middle frame (20) and a shell assembly (40) according to any one of claims 1-9, wherein the display screen (10) is buckled on one side of the middle frame (20), and the shell assembly (40) is buckled on the other side of the middle frame (20).