CN118101806A - Terminal rear cover, preparation method thereof and terminal - Google Patents

Abstract

The application provides a terminal rear cover, a preparation method thereof and a terminal. The terminal rear cover comprises a main body part and an edge part, wherein the main body part comprises a first outer surface and a first inner surface which is oppositely arranged in the thickness direction of the main body part, and when the terminal rear cover and the terminal middle frame are in an assembled state, the first inner surface is close to the terminal middle frame compared with the first outer surface. The edge part is arranged at the edge of the main body part and extends to encircle the main body part, and the edge part protrudes out of the first inner surface of the main body part along the thickness direction of the edge part. The thickness of the main body part is smaller than the width of the edge part, and the width direction of the edge part is perpendicular to the thickness direction and the length direction of the edge part; the main body part and the edge part are manufactured through an injection molding process. The rear cover of the terminal provided by the application has higher flatness, no deformation and no warping, is beneficial to the assembly of the terminal and can improve the appearance effect of the terminal.

Description

Terminal rear cover, preparation method thereof and terminal

Technical Field

The application relates to the field of terminal equipment, in particular to a terminal rear cover, a preparation method thereof and a terminal.

Background

With the development of technology, mobile terminals have become a necessity in people's daily life.

The rear cover of the existing mobile terminal is easy to deform and warp in the manufacturing process, is unfavorable for the assembly of the mobile terminal, and affects the appearance effect of the mobile terminal.

Disclosure of Invention

In order to solve the technical problems, the application provides the terminal rear cover, the preparation method thereof and the terminal, which can avoid deformation and warpage of the terminal rear cover, are beneficial to assembly of the terminal and can improve the appearance effect of the terminal.

The first aspect of the present application provides a terminal back cover, the terminal back cover including a main body portion and a rim portion, the main body portion including a first outer surface and a first inner surface disposed opposite to each other in a thickness direction of the main body portion, the first inner surface being closer to a terminal center than the first outer surface when the terminal back cover is in an assembled state with the terminal center. The edge part is arranged at the edge of the main body part and extends to encircle the main body part, and the edge part protrudes out of the first inner surface of the main body part along the thickness direction of the edge part. The thickness of the main body part is smaller than the width of the edge part, and the width direction of the edge part is perpendicular to the thickness direction and the length direction of the edge part; the main body part and the edge part are manufactured through an injection molding process.

The second aspect of the present application provides a method for manufacturing a rear cover of a terminal, the method comprising: the material to be processed is integrally injection molded and processed to obtain the terminal rear cover; wherein, in the process of injection molding the material to be processed to form the main body portion and the edge portion, a force is applied to the main body portion in a direction from the first outer surface to the first inner surface of the main body portion, and at least part of the force is used for counteracting internal stress of the main body portion.

A third aspect of the present application provides a terminal comprising the aforementioned terminal rear cover.

According to the terminal rear cover, the thickness of the main body part is smaller than the width of the edge part, so that the edge part can provide larger supporting force for the main body part and play a role in reinforcing and preventing deformation for the main body part when the main body part and the edge part are manufactured through an injection molding process, and the main body part is prevented from warping, so that the flat terminal rear cover can be obtained. And furthermore, the terminal rear cover and the terminal middle frame are assembled. And because the terminal rear cover is relatively flat, the top of the battery compartment formed by the assembly of the terminal rear cover and other components is relatively flat, and the battery accommodated in the battery compartment can be prevented from being deformed due to the extrusion of the terminal rear cover. In addition, the terminal rear cover with a flat surface can improve the appearance aesthetic degree.

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 is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a rear cover of a terminal according to an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view taken along the direction I-I' shown in FIG. 1.

Fig. 3 is an enlarged view of a in fig. 2.

Fig. 4 is a schematic cross-sectional structure of a rear cover of a terminal according to another embodiment of the present application.

Fig. 5 is an enlarged view of C in fig. 4.

Fig. 6 is an enlarged view of B in fig. 2.

Fig. 7 is a schematic cross-sectional structure of a back cover blank according to an embodiment of the application.

Fig. 8 is a block diagram of a terminal according to an embodiment of the present application.

Reference numerals illustrate:

100-a terminal rear cover; 10-a main body; 20-edge portion; 11-a first outer surface; 12-a first inner surface; 30-mounting part; 31-functional holes; 32-a support; 321-a second outer surface; 322-a second inner surface; 21-a third outer surface; 22-a third inner surface; 51-a first arc; 52-a second arc; 53-a third arc; 54-fourth arc; 200-a rear cover embryo body; 20 a-rim embryo body; 30 a-mounting part embryo body; 40-extension; 41-an adhesive surface; 300-terminal; 150-battery.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without any inventive effort, are intended to be within the scope of the application.

In the description of the present application, the terms "first," "second," "third," and the like are used for distinguishing between different objects and not for describing a particular sequential order, and the terms "upper," "lower," "inner," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, unless explicitly stated and limited otherwise, the term "coupled" is to be interpreted broadly, as for example, whether fixedly coupled, detachably coupled, or integrally coupled; can be directly connected, can also be indirectly connected through an intermediate medium, and can also be the communication between the two elements; may be a communication connection; may be an electrical connection. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a rear cover 100 of a terminal according to an embodiment of the present application, fig. 2 is a schematic sectional view taken along the direction I-I' shown in fig. 1, and fig. 3 is an enlarged view of a in fig. 2. As shown in fig. 1 to 3, the rear terminal cover 100 includes a main body 10 and a rim 20, the main body 10 includes a first outer surface 11 and a first inner surface 12 disposed opposite to each other in a thickness direction (Z direction shown in fig. 2 and 3) of the main body 10, and the first inner surface 12 is closer to the terminal center than the first outer surface 11 when the rear terminal cover 100 is assembled with the terminal center. The edge portion 20 is disposed at an edge of the main body portion 10 and extends around the main body portion 10, and the edge portion 20 protrudes from the first inner surface 12 of the main body portion 10 along a thickness direction (a Z direction as shown in fig. 2 and 3) of the edge portion 20. Wherein, the thickness (T1 shown in fig. 3) of the main body 10 is smaller than the width (W1 shown in fig. 3) of the edge 20, and the width direction (X direction shown in fig. 2 and 3) of the edge 20 is perpendicular to the thickness direction and the length direction of the edge 20; the main body 10 and the edge 20 are manufactured by injection molding.

According to the terminal back cover 100 provided by the embodiment of the application, the thickness of the main body part 10 is smaller than the width of the edge part 20, so that the edge part 20 can provide a larger supporting force for the main body part 10 and play a role in reinforcing and preventing deformation of the main body part 10 when the main body part 10 and the edge part 20 are manufactured by an injection molding process, and deformation and warping of the main body part 10 are avoided, so that a flat terminal back cover 100 can be obtained. Further, the terminal rear cover 100 is advantageously assembled with the terminal center. And, because the terminal back cover 100 is relatively flat, the top of the battery compartment formed by the terminal back cover 100 and other components after being assembled is relatively flat, so that the battery accommodated in the battery compartment can be prevented from being deformed due to extrusion of the terminal back cover 100. In addition, the flat-surfaced terminal rear cover 100 can improve the external aesthetic appearance.

In some embodiments, as shown in fig. 1, the edge portion 20 may be disposed on the entire edge of the main body portion 10, that is, in a closed shape surrounding the main body portion 10. In other embodiments, the edge 20 may also be provided on a part of the edge of the main body 10, that is, may be open around the main body 10. For example, the rim portion 20 may include a plurality of sub-rim portions spaced apart from the edge of the body portion 10.

In some embodiments, the ratio of the maximum width of the rim portion 20 to the thickness of the body portion 10 is greater than or equal to 3. By setting the ratio of the maximum width of the rim portion 20 to the thickness of the main body portion 10 to be 3 or more.

If the ratio is greater than 1 and less than 3, the supporting effect and the reinforcing and deformation preventing effect of the edge portion 20 on the main body portion 10 are limited, and the flatness of the main body portion 10 may be affected. When the ratio is 3 or more, the supporting effect of the edge portion 20 on the main body portion 10 is greatly improved, and the deformation and warpage of the main body portion 10 can be more effectively prevented, so that the flatness of the main body portion 10 can be greatly improved.

In some embodiments, the width of each location of the rim portion 20 is the same, i.e., the maximum width of the rim portion 20 is equal to the width of each location of the rim portion 20, and the ratio of the width of each location of the rim portion 20 to the thickness of the body portion 10 is greater than or equal to 3.

In other embodiments, the rim portion 20 has a different width at least at a portion thereof and a ratio of the maximum width to the thickness of the body portion 10 is greater than or equal to 3, and the minimum width of the rim portion 20 is greater than the thickness of the body portion 10 to avoid warping of the body portion 10. Further, the ratio of the minimum width of the rim portion 20 to the thickness of the body portion 10 may be greater than or equal to 3. Wherein, the widths of the part positions of the edge part 20 are different, and the widths of the rest part positions are the same; or the width of each location of the rim portion 20 is different.

Wherein in some embodiments, the width of the edge portion 20 varies randomly in a direction away from the main body portion 10, and may increase and decrease, and further may also alternate; or decrease and increase, and further may alternate. The ratio of the maximum width of the rim portion 20 to the thickness of the body portion 10 is greater than or equal to 3.

Referring to fig. 4 and 5, fig. 4 is a schematic cross-sectional structure of a rear cover 100 of a terminal according to another embodiment of the application, and fig. 5 is an enlarged view of fig. 4C. In some embodiments, as shown in fig. 4 and 5, the width of the edge portion 20 gradually increases in a direction away from the main body portion 10, and the width of the end of the edge portion 20 near the main body portion 10 (W3 shown in fig. 5) is greater than the thickness of the main body portion 10 (T1 shown in fig. 5), that is, the minimum width of the edge portion 20 is greater than the thickness of the main body portion 10. The ratio of the width of the end of the edge portion 20 away from the main body portion 10 (W4 as shown in fig. 5) to the thickness of the main body portion 10 is greater than or equal to 3, i.e., the ratio of the maximum width of the edge portion 20 to the thickness of the main body portion 10 is greater than or equal to 3, i.e., W4/T1 is greater than or equal to 3. Wherein the ratio of the width of the end of the edge portion 20 near the main body portion 10 to the thickness of the main body portion 10 may be greater than 1, i.e., W3/T1 > 1; or further, W3/T1 is larger than or equal to 3.

In some embodiments, the width of the rim portion 20 gradually decreases in a direction away from the body portion 10, and the width of the end of the rim portion 20 away from the body portion 10 is greater than the thickness of the body portion 10, i.e., the minimum width of the rim portion 20 is greater than the thickness of the body portion 10. The ratio of the width of the end of the rim portion 20 near the main body portion 10 to the thickness of the main body portion 10 is greater than or equal to 3, i.e., the ratio of the maximum width of the rim portion 20 to the thickness of the main body portion 10 is greater than or equal to 3. Wherein the ratio of the width of the end of the rim portion 20 away from the main body portion 10 to the thickness of the main body portion 10 may be greater than 1, or may further be greater than or equal to 3.

In some embodiments, the thickness of the body portion 10 is greater than or equal to 0.8mm and the maximum width of the rim portion 20 is greater than or equal to 2.6mm. And, the ratio of the maximum width of the edge portion 20 to the thickness of the main body portion 10 is greater than or equal to 3.

Through setting up the thickness of main part 10 is greater than or equal to 0.8mm, the maximum width of border portion 20 is greater than or equal to 2.6mm, can make main part 10 with border portion 20 all possess higher rigidity and intensity, thereby can improve lid 100 holistic rigidity, intensity and structural stability behind the terminal, and then lid 100's anti deformability is stronger behind the terminal. And, the maximum width of the edge portion 20 is greater than or equal to 2.6mm, when the rear cover 100 is assembled with the terminal middle frame or other terminal components, the edge portion 20 can be more easily matched or clamped with the terminal middle frame or other terminal components, and thus the assembling and disassembling processes are more convenient.

Obviously, the thickness of the main body 10 and the specific dimension of the maximum width of the edge 20 can be set according to practical requirements.

In some embodiments, the width of each location of the rim portion 20 is the same, i.e., the maximum width of the rim portion 20 is equal to the width of each location of the rim portion 20, the maximum width of the rim portion 20 is greater than or equal to 2.6mm, the thickness of the body portion 10 is greater than or equal to 0.8mm, and the ratio of the width at each location of the rim portion 20 to the thickness of the body portion 10 is greater than or equal to 3.

In other embodiments, the thickness of the main body 10 is greater than or equal to 0.8mm, the width of the rim 20 at least partially varies and the maximum width is greater than or equal to 2.6mm, and the ratio of the maximum width of the rim 20 to the thickness of the main body 10 is greater than or equal to 3, and the minimum width of the rim 20 is greater than the thickness of the main body 10 to avoid warping of the main body 10. Further, the width of each position of the rim portion 20 is greater than or equal to 2.6mm. Wherein, the widths of the part positions of the edge part 20 are different, and the widths of the rest part positions are the same; or the width of each location of the rim portion 20 is different.

Wherein in some embodiments, the width of the edge portion 20 varies randomly in a direction away from the main body portion 10, and may increase and decrease, and further may also alternate; or decrease and increase, and further may alternate. The maximum width of the rim portion 20 is greater than or equal to 2.6mm.

In some embodiments, the width of the rim portion 20 increases gradually in a direction away from the body portion 10. The width of the end of the rim portion 20 near the main body portion 10 (W3 shown in fig. 5) is greater than or equal to 2.6mm, and/or the width of the end of the rim portion 20 remote from the main body portion 10 (W4 shown in fig. 5) is greater than or equal to 2.6mm.

In some embodiments, the width of the rim portion 20 decreases gradually in a direction away from the body portion 10. The width of the end of the rim portion 20 near the main body portion 10 is greater than or equal to 2.6mm, and/or the width of the end of the rim portion 20 remote from the main body portion 10 is greater than or equal to 2.6mm.

Referring to fig. 2 and 6, fig. 6 is an enlarged view of B in fig. 2. In some embodiments, as shown in fig. 2 and 6, the terminal back cover 100 further includes a mounting portion 30, the mounting portion 30 is formed and penetrates through a predetermined area of the main body portion 10, the mounting portion 30 includes one or more functional holes 31 and a supporting portion 32 surrounding the functional holes 31, and a thickness (T2 shown in fig. 6) of the supporting portion 32 is greater than a thickness (T1 shown in fig. 6) of the main body portion 10.

Wherein the thickness direction of the support portion 32 is parallel to the thickness direction of the main body portion 10.

The functional hole 31 is used for allowing a camera to pass through so that the camera is exposed out of the terminal rear cover 100, and the camera can collect images conveniently. The supporting portion 32 surrounds the functional hole 31 and can serve to support the camera.

The number of the functional holes 31 may be one, or at least two, and the specific number may be set according to actual requirements.

When the number of the functional holes 31 is at least two, the at least two functional holes 31 are spaced apart.

By setting the thickness of the supporting portion 32 to be greater than that of the main body portion 10, the supporting portion 32 can provide a larger supporting force for the main body portion 10 and further play a role in reinforcing and preventing deformation of the main body portion 10, so that deformation and warping of the main body portion 10 can be further avoided, and the flatness of the terminal rear cover 100 is further improved.

In addition, by forming at least one functional hole 31 in the main body 10, the stress accumulated in the main body 10 can be released, so that the stress distribution of the whole main body 10 is more uniform, the deformation and warpage of the main body 10 can be further avoided, and the defects such as cracks when the main body 10 is stressed can be prevented due to the release of the stress.

In some embodiments, the thickness of the support portion 32 is the same at each location and is greater than the thickness of the body portion 10.

In other embodiments, the thickness of the support portion 32 varies at least in part and the maximum thickness is greater than the thickness of the body portion 10. Further, the thickness of each position of the support portion 32 is greater than the thickness of the main body portion 10. Wherein, the thickness of the support part 32 is different at part positions, the thickness of the rest part positions is the same, or the thickness of each position of the support part 32 is different.

In some embodiments, the thickness of the support portion 32 varies randomly in a direction away from the main body portion 10, and may increase and decrease, and further may also alternate; or decrease and increase, and further may alternate. The maximum thickness of the support portion 32 is greater than the thickness of the body portion 10.

In some embodiments, the thickness of the support portion 32 increases gradually in a direction away from the body portion 10. The maximum thickness of the support portion 32 is greater than the thickness of the body portion 10. Further, the thickness of the end of the supporting portion 32 near the main body portion 10 is greater than the thickness of the main body portion 10, i.e., the minimum thickness of the supporting portion 32 is greater than the thickness of the main body portion 10.

In some embodiments, the thickness of the support portion 32 decreases gradually in a direction away from the body portion 10. The maximum thickness of the support portion 32 is greater than the thickness of the body portion 10. Further, the thickness of the end of the support portion 32 remote from the main body portion 10 is greater than the thickness of the main body portion 10.

In some embodiments, the ratio of the maximum thickness of the support portion 32 to the thickness of the body portion 10 is greater than or equal to 2.5. By setting the ratio of the maximum thickness of the supporting portion 32 to the thickness of the main body portion 10 to be greater than or equal to 2.5, the supporting effect of the supporting portion 32 on the main body portion 10 can be stronger than that of the ratio of greater than 1 and less than 2.5, and deformation and warpage of the main body portion 10 can be prevented more effectively.

In some embodiments, the thickness of each location of the support portion 32 is the same and the ratio of the thickness of each location to the thickness of the body portion 10 is greater than or equal to 2.5, i.e., the ratio of the maximum thickness of the support portion 32 to the thickness of the body portion 10 is greater than or equal to 2.5.

In other embodiments, the thickness of the support portion 32 varies at least in part and the ratio of the maximum thickness to the thickness of the body portion 10 is greater than or equal to 2.5. Further, the ratio of the thickness of each position of the support portion 32 to the thickness of the main body portion 10 is greater than or equal to 2.5. Wherein, the thickness of the support part 32 is different at part positions, the thickness of the rest part positions is the same, or the thickness of each position of the support part 32 is different.

Wherein in some embodiments, the thickness of the supporting portion 32 varies randomly along a direction away from the main body portion 10, and may be increased and then decreased, and further may also be alternated; or decrease and increase, and further may alternate. The ratio of the maximum thickness of the support portion 32 to the thickness of the main body portion 10 is greater than or equal to 2.5.

In some embodiments, as shown in fig. 6, the thickness of the support portion 32 increases gradually in a direction away from the main body portion 10. The ratio of the thickness of the end of the supporting portion 32 away from the main body portion 10 (t2_max as shown in fig. 6) to the thickness of the main body portion 10 is greater than or equal to 2.5, i.e., the ratio of the maximum thickness of the supporting portion 32 to the thickness of the main body portion 10 is greater than or equal to 2.5, i.e., t2_max/t1 is greater than or equal to 2.5. Wherein the ratio of the thickness of the end of the supporting portion 32 near the main body portion 10 (t2_min as shown in fig. 6) to the thickness of the main body portion 10 may be greater than 1, that is, t2_min/T1 > 1; or further, T2_min/T1 is more than or equal to 2.5.

In some embodiments, the thickness of the support portion 32 decreases gradually in a direction away from the body portion 10. The ratio of the thickness of the end of the support portion 32 near the main body portion 10 to the thickness of the main body portion 10 is greater than or equal to 2.5, i.e., the ratio of the maximum thickness of the support portion 32 to the thickness of the main body portion 10 is greater than or equal to 2.5. The ratio of the thickness of the end of the support portion 32 remote from the main body portion 10 to the thickness of the main body portion 10 may be greater than 1, or may be further, greater than or equal to 2.5.

In some embodiments, the thickness of the body portion 10 is greater than or equal to 0.8mm, the maximum thickness of the support portion 32 is greater than or equal to 2.2mm, and the maximum thickness of the support portion 32 is greater than the thickness of the body portion 10. By setting the maximum thickness of the supporting portion 32 to be greater than or equal to 2.2mm, the main body portion 10 can be supported, reinforced and deformation-preventing, and the supporting portion 32 has high rigidity and strength, so that the camera can be mounted conveniently, and the mounting stability of the camera is improved. And, rigidity, strength and structural stability of the terminal rear cover 100 can be ensured. Obviously, the specific dimension of the maximum thickness of the supporting portion 32 may be set according to practical requirements, and may be greater than or equal to 2.2 mm.

In some embodiments, the thickness of the support 32 is the same at each location and greater than or equal to 2.2mm.

In other embodiments, the support 32 may have a different thickness at least partially and a maximum thickness of greater than or equal to 2.2mm. Further, the thickness of each position of the support portion 32 is greater than or equal to 2.2mm. Wherein, the thickness of the support part 32 is different at part positions, the thickness of the rest part positions is the same, or the thickness of each position of the support part 32 is different.

In some embodiments, the thickness of the support portion 32 varies randomly in a direction away from the main body portion 10, and may increase and decrease, and further may also alternate; or decrease and increase, and further may alternate. The maximum thickness of the support portion 32 is greater than or equal to 2.2mm.

In some embodiments, as shown in fig. 6, the thickness of the support portion 32 increases gradually in a direction away from the main body portion 10. The thickness of the end of the support portion 32 near the main body portion 10 is greater than or equal to 2.2mm, i.e., t2_max is greater than or equal to 2.2mm, and/or the thickness of the end of the support portion 32 remote from the main body portion 10 is greater than or equal to 2.2mm, i.e., t2_min is greater than or equal to 2.2mm.

In some embodiments, the thickness of the support portion 32 decreases gradually in a direction away from the body portion 10. The thickness of the end of the support portion 32 near the main body portion 10 is greater than or equal to 2.2mm, and/or the thickness of the end of the support portion 32 far from the main body portion 10 is greater than or equal to 2.2mm.

In some embodiments, as shown in fig. 1, the one or more functional holes 31 are disposed symmetrically along a first central axis L1 and/or a second central axis L2 of the main body 10, where the first central axis L1 is parallel to a length direction (Y direction as shown in fig. 1) of the main body 10, and the second central axis L2 is parallel to a width direction (X direction as shown in fig. 1) of the main body 10, and the width direction of the main body 10 is perpendicular to the length direction and the thickness direction of the main body 10.

By arranging the one or more functional holes 31 symmetrically along the first central axis L1 and/or the second central axis L2, stress release of the main body 10 can be made more uniform, and structural stability of the main body 10 can be improved, preventing deformation and warpage of the main body 10. In addition, the one or more functional holes 31 are symmetrically arranged on the main body 10, so that the main body 10 can be uniformly stressed in the process of demolding the main body 10, and the main body 10 can be easily removed from the mold, thereby being beneficial to demolding of the main body 10.

In some embodiments, as shown in fig. 2 and 6, the supporting portion 32 includes a second outer surface 321 and a second inner surface 322 disposed opposite to the supporting portion 32 in a thickness direction, when the terminal back cover 100 is in an assembled state with the terminal middle frame, the second inner surface 322 is closer to the terminal middle frame than the second outer surface 321, the second inner surface 322 is farther from the terminal middle frame than the first inner surface 12 of the main body portion 10, that is, the supporting portion 32 protrudes outside the main body portion 10, and the main body portion 10 surrounds the supporting portion 32 and encloses a groove with the supporting portion 32. So as to provide a receiving space for the camera and facilitate demolding of the mounting portion 20.

In some embodiments, as shown in fig. 6, the second inner surface 322 is in transition with the first inner surface 12 by a first arc 51, and/or the second outer surface 321 is in transition with the first outer surface 11 by a second arc 52. Through the arc transitional connection, stress concentration can be avoided, so that the connection part of the main body part 10 and the supporting part 32 has stronger capability of bearing external force, thereby improving structural stability and reducing damage possibility. Also, the rounded transition connection provides a smooth surface, so that the connection between the body portion 10 and the support portion 32 is more natural and smooth, and the overall aesthetic appearance of the terminal rear cover 100 can be improved.

In some embodiments, the terminal rear cover 100 further includes a protective layer (not shown) disposed on the first outer surface 11 of the main body 10 and the second outer surface 321 of the support portion 32. By providing the protective layer, scratch resistance and scratch resistance of the first outer surface 11 of the main body part 10 and the second outer surface 321 of the supporting part 32 can be improved, and the rear cover 100 of the terminal can be more beautiful, smooth and have better overall texture.

Wherein, the first outer surface 11 of the main body 10 and the second outer surface 321 of the supporting portion 32 may be coated with a shower solution by a shower coating process, and/or the first inner surface 12 of the main body 10 and the second inner surface 322 of the supporting portion 32 may be coated with a shower solution. The shower bath may include a UV gel.

By arranging the second inner surface 322 and the first inner surface 12 to be in arc transition connection, and/or the second outer surface 321 and the first outer surface 11 to be in arc transition connection, the shower coating liquid can be uniformly coated on the first outer surface 11 of the main body 10 and the second outer surface 321 of the supporting part 32, and/or the shower coating liquid can be uniformly coated on the first inner surface 12 of the main body 10 and the second inner surface 322 of the supporting part 32, so that thicker coating layers are prevented from being formed due to accumulation at the connection part of the first outer surface 11 and the second outer surface 321 and/or the connection part of the first inner surface 12 and the second inner surface 322, and the thicker coating layers are easy to crack and influence the appearance.

In some embodiments, as shown in fig. 6, the second inner surface 322 is in transitional connection with the first inner surface 12 through the first circular arc 51, and the second outer surface 321 is in transitional connection with the first outer surface 11 through the second circular arc 52, wherein the curvature of the first circular arc 51 is smaller than the curvature of the second circular arc 52, i.e. the second circular arc 52 is more curved than the first circular arc 51. The die-stripping of the installation part blank formed in the injection molding process is facilitated. In addition, the curvature of the first circular arc 51 is smaller than that of the second circular arc 52, so that the thickness between the second outer surface 321 and the second inner surface 322 gradually increases along the direction away from the main body 10, thereby the connection between the support portion 32 and the main body 10 has the effect of a convex lens, the converging effect of the light passing through the connection is enhanced, and the visual effect of the terminal rear cover 100 is optimized.

In some embodiments, as shown in fig. 3, the edge 20 includes a third outer surface 21 and a third inner surface 22 disposed opposite to each other, where the third outer surface 21 is in transitional connection with the first outer surface 11 through a third arc 53, and/or the third inner surface 22 is in transitional connection with the first inner surface 12 through a fourth arc 54. Through the arc transitional connection, stress concentration can be avoided, so that the connection part of the main body part 10 and the edge part 20 has stronger capability of bearing external force, thereby improving structural stability and reducing damage possibility. Also, the arc transition connection can provide a smooth surface, so that the connection between the body portion 10 and the rim portion 20 is more natural and smooth, and the overall aesthetic appearance of the terminal rear cover 100 can be improved.

In some embodiments, the protective layer is also provided on the third outer surface 21 of the rim portion 20. The scratch resistance and scratch resistance of the third outer surface 21 of the rim portion 20 can be improved by providing the protective layer, and the terminal rear cover 100 can be more beautiful, smooth and have better overall texture.

Wherein, the first outer surface 11 of the main body 10 and the third outer surface 21 of the edge 20 may be coated with a shower solution by a shower coating process, and/or the first inner surface 12 of the main body 10 and the third inner surface 22 of the edge 20 may be coated with a shower solution. The shower bath may include a UV gel.

By arranging the third outer surface 21 and the first outer surface 11 to be in arc transition connection, and/or the third inner surface 22 and the first inner surface 12 to be in arc transition connection, the shower coating liquid can be uniformly coated on the first outer surface 11 of the main body 10 and the third outer surface 21 of the edge portion 20, and/or uniformly coated on the first inner surface 12 of the main body 10 and the third inner surface 22 of the edge portion 20, so that thick coating layers are prevented from being formed due to accumulation of the shower coating liquid at the connection part of the first outer surface 11 and the third outer surface 21 and/or the connection part of the first inner surface 12 and the third inner surface 22, and the thick coating layers are easy to crack and influence the appearance.

In some embodiments, as shown in fig. 3, the third outer surface 21 is in transitional connection with the first outer surface 11 through the third circular arc 53, and the third inner surface 22 is in transitional connection with the first inner surface 12 through the fourth circular arc 54, wherein the curvature of the third circular arc 53 is smaller than the curvature of the fourth circular arc 54, i.e. the fourth circular arc 54 is more curved than the third circular arc 53. Is favorable for demolding the blank at the edge part formed in the injection molding process. In addition, the curvature of the third arc 53 is smaller than that of the fourth arc 54, so that the width between the third outer surface 21 and the third inner surface 22 gradually increases along the direction away from the main body 10, so that the junction between the edge 20 and the main body 10 has the effect of a convex lens, the converging effect of the light passing through the junction is enhanced, and the visual effect of the terminal rear cover 100 is further optimized.

In some embodiments, the ratio of the thickness of the rim 20 (T3 as shown in fig. 3) to the width of the rim 20 (W1 as shown in fig. 3) is greater than 1 and less than or equal to 1.5. The edge portion 20 can be made to have a high structural strength, and the deformation resistance of the edge portion 20 is high. If the ratio is greater than 1.5, the edge portion 20 is easily deformed in the width direction of the edge portion 20.

In some embodiments, the terminal rear cover 100 further includes at least one reinforcing portion (not shown) disposed on the first inner surface 12 of the main body 10, and the extending direction of the reinforcing portion is parallel to the length direction of the main body 10, i.e., the length direction of the reinforcing portion is parallel to the length direction of the main body 10.

When the body 10 is injection-molded, the body 10 has a relatively large shrinkage stress in the longitudinal direction, and when the stress is released, warpage tends to occur in the longitudinal direction. By providing the reinforcing portion with the extending direction of the reinforcing portion being parallel to the longitudinal direction of the main body portion 10, the main body portion 10 can be prevented from being deformed in the longitudinal direction of the main body portion 10, thereby improving the deformation resistance of the main body portion 10.

In some embodiments, the ratio of the length to the width of the body portion 10 is greater than or equal to 2.

In some embodiments, the body portion 10 has a length of greater than or equal to 10cm and a width of greater than or equal to 5cm. When the length and width of the main body 10 are respectively within the above ranges, the shrinkage of the main body 10 is large during injection molding due to the large length and width of the main body 10, that is, the large planar dimension of the main body 10, and shrinkage rates of the main body 10 in various directions are likely to be inconsistent, but in the embodiment of the present application, the edge portion 20 is provided to strengthen the main body 10 having a large planar dimension, so that the main body 10 is not deformed or warped due to the edge portion 20 even if shrinkage rates of the main body 10 in various directions are different. Further, by further providing the mounting portion 20, the deformation and warpage of the main body portion 10 can be further prevented.

In some embodiments, the terminal back cover 100 is a transparent or translucent back cover.

In the prior art, in order to improve the deformation resistance of the rear cover, a ceramic material is generally added to form a reinforcing layer to prevent the rear cover from being deformed and warped when the rear cover is manufactured. However, the addition of ceramic material may result in the rear cover being opaque, such that a transparent or translucent rear cover cannot be made. In the embodiment of the present application, the width of the edge portion 20 is at least greater than the thickness of the main body portion 10, so that the main body portion 10 is prevented from being deformed and warped, and no ceramic material is required to be added when the terminal rear cover 100 is manufactured, so that a transparent or semitransparent rear cover can be manufactured, thereby meeting the appearance requirement of the user on the terminal rear cover 100.

In some embodiments, the material of the terminal back cover 100 may include one or more of PC (Polycarbonate), transparent ABS (Acrylonitrile Butadiene Styrene ) and PMMA (Polymethyl Methacrylate, polymethyl methacrylate). The terminal back cover 100 may also be made of other transparent or translucent polymeric materials.

In some embodiments, the terminal back cover 100 is integrally formed.

In some embodiments, as shown in fig. 2 and 3, the terminal rear cover 100 further includes an extension portion 40, where the extension portion 40 is disposed at an end of the rim portion 20 away from the main body portion 10, and the extension portion 40 may be integrally formed with the rim portion 20. As shown in fig. 3, the extension 40 includes an adhesive surface 41 for connecting the rear terminal cover 100 to other terminal components by bonding with the other terminal components.

In some embodiments, the ratio of the width of the extension 40 (W2 as shown in fig. 3) to the thickness of the extension 40 (T4 as shown in fig. 3) is greater than 1 and less than or equal to 1.5, which may result in the extension 40 having a higher structural strength and the extension 40 having a higher resistance to deformation. If the ratio is greater than 1.5, the extension 40 is easily deformed in the width direction of the extension 40.

Wherein, the width direction of the extension portion 40 is parallel to the width direction of the edge portion 20, and the thickness direction of the extension portion 40 is parallel to the thickness direction of the edge portion 20. The width of the extension 40 is a dimension in the width direction, and the thickness of the extension 40 is a dimension in the thickness direction.

The embodiment of the application also provides a preparation method of the terminal rear cover, which comprises the following steps: the material to be processed is integrally injection molded and processed to obtain the terminal rear cover 100 according to any one of the foregoing embodiments.

In some embodiments, during injection molding of the material to be processed to form the body portion 10 and the rim portion 20, a force is applied to the body portion 10 in a direction from the first outer surface 11 to the first inner surface 12 of the body portion 10, at least a portion of the force acting to counteract an internal stress of the body portion 10.

In the injection molding of the material to be processed to form the main body 10, the main body 10 is easily protruded in the direction from the first inner surface 12 to the first outer surface 11 due to the internal stress, and by applying the force to the main body 10 in the direction from the first outer surface 11 to the first inner surface 12, the internal stress of the main body 10 can be offset, preventing the main body 10 from being deformed and warped during the manufacturing of the main body 10. When the battery accommodated in the battery compartment is deformed and expanded after the rear end cap 100 is assembled with other terminal components to form the battery compartment, the battery expands to generate a force on the main body 10 in a direction from the first inner surface 12 to the first outer surface 11, and the force generated in the main body 10 in the direction from the first outer surface 11 to the first inner surface 12 can be canceled with the force generated by the battery on the main body 10, thereby avoiding the main body 10 from being lifted up when the battery expands, that is, avoiding the protrusion of the main body 10.

Wherein, in the process of injection molding the material to be processed to form the main body portion 10 and the rim portion 20, a pressing plate may be brought into contact with the main body portion 10 and pushed in a direction from the first outer surface 11 to the first inner surface 12, thereby applying a force to the main body portion 10 in a direction from the first outer surface 11 to the first inner surface 12. Or by blowing air toward the body 10 in a direction from the first outer surface 11 to the first inner surface 12, a force in a direction from the first outer surface 11 to the first inner surface 12 is applied to the body 10.

In some embodiments, the terminal back cover 100 includes the mounting portion 30, as previously described. The preparation method comprises the following steps: performing injection molding on the material to be processed to obtain a rear cover blank, wherein the rear cover blank comprises a main body part 10, a border part blank and a mounting part blank, the border part blank is formed at the edge of the main body part 10 and extends to encircle the main body part 10, the border part blank protrudes out of a first inner surface 12 of the main body part 10 along the thickness direction of the border part blank, and the mounting part blank is formed and penetrates through a preset area of the main body part 10; the mounting portion 30 includes the one or more function holes 31 and the supporting portion 32, and the rim portion blank is processed to form the rim portion 20.

Referring to fig. 7, a schematic cross-sectional structure of a back cover blank 200 according to an embodiment of the application is shown. As shown in fig. 7, the back cover blank 200 includes the main body 10, a border portion blank 20a and a mounting portion blank 30a, the border portion blank 20a is formed at an edge of the main body 10 and extends around the main body 10, the border portion blank 20a protrudes from the first inner surface 12 of the main body 10 along a thickness direction of the border portion blank 20a, and the mounting portion blank 30a is formed and penetrates through a predetermined area of the main body 10.

After the rear cover blank 200 is obtained through the injection molding process, the rear cover blank 200 may be processed, specifically, one or more functional holes 31 may be formed by removing a portion of the mounting portion blank 30a, and the rim portion 20 may be formed by removing an excess portion of the rim portion blank 20 a. The rear cover blank 200 may be processed by a CNC (Computerized Numerical Control, computer numerical control) process, so as to obtain the terminal rear cover 100 shown in fig. 1 to 3 and 6.

In some embodiments, the injection molding the material to be processed to obtain the rear cover blank 200 includes: and heating and melting the material to be processed, and enabling the melted material to be processed to flow along a preset path to form a molten liquid flow, and forming the rear cover blank 200 by using the molten liquid flow, wherein a front section of the molten liquid flow, which is positioned at the front in the flow direction, forms the mounting part blank 30a, and a rear section of the molten liquid flow, which is positioned at the rear in the flow direction, forms the main body 10 and the edge part blank 20a.

Wherein, since the front section of the melt flow first flows into the mold and is easily formed as cold glue, the front section of the melt flow is concentrated in a reserved area of the installation part blank 30a by forming the installation part blank 30a by disposing the front section of the melt flow, and the reserved area is removed by processing to form the one or more functional holes 31, that is, the cold glue generated during the molding process is removed in the subsequent processing process. Accordingly, formation of the main body 10 and the edge 20 by cold glue can be avoided, and if cold glue forms the main body 10 and the edge 20, the structural strength of the main body 10 and the edge 20 is reduced, so that the main body 10 and the edge 20 are easily deformed and warped. In addition, the mounting portion 30 formed after the cold glue is removed by the processing technology, the structural strength of the mounting portion 30 is not affected because the cold glue is removed, and the mounting portion 30 is not easy to deform and warp. In addition, the cold glue easily causes defects such as bulges and air holes, and the defects are concentrated in the reserved area by guiding the cold glue so as to form the reserved area, and the defects can be eliminated by removing the reserved area, so that the aesthetic degree and the usability of the terminal rear cover 100 are improved.

In some embodiments, the material to be processed is injection molded to obtain the rear cover blank 200, specifically, a mold is provided, and the mold is provided with a first groove and a second groove which are communicated with each other; and heating and melting the material to be processed, and enabling the melted material to be processed to flow into the second groove from the first groove, and filling the first groove and the second groove, namely, enabling the molten liquid flow formed by the melted material to flow into the second groove from the first groove, and filling the first groove and the second groove, so as to form the rear cover blank 200, wherein the preset path is from the first groove to the second groove. Wherein the material to be processed in the first groove forms the rim portion blank 20a and the main body 10, and the material to be processed in the second groove forms the mounting portion blank 30a. That is, the front section of the melt flow flows into the second groove to form the mounting portion blank 30a, and the rear section of the melt flow flows into the first groove to form the rim portion blank 20a and the main body 10.

As mentioned above, the second inner surface 322 is further from the terminal center than the first inner surface 12 of the main body 10, i.e. there is a height difference between the support portion 32 and the main body 10. Thus, in order to manufacture the support portion 32 and the main body portion 10 having a height difference, the second groove and the first groove of the mold need to have a height difference. In the process of forming the installation part blank 30a by injection molding, the second groove is lower than the first groove, so that the flow of the molten liquid flows into the second groove from the first groove to form the installation part blank 30a, and the front section of the flow of the molten liquid flows into the second groove, namely, the formation of the reserved area by the cold glue is facilitated, so that the subsequent removal is facilitated.

As described above, the second inner surface 322 is in transitional connection with the first inner surface 12 through the first arc 51, and/or the second outer surface 321 is in transitional connection with the first outer surface 11 through the second arc 52, so that in order to manufacture the terminal back cover 100 with the above structure, the connection between the first groove and the second groove needs to be designed into an arc transitional section, and the arc transitional between the first groove and the second groove is beneficial to smoothly, uniformly and continuously flowing the melt flow from the first groove into the second groove, thereby being beneficial to forming the main body 10 and the installation part blank 30a.

Referring to fig. 8, a block diagram of a terminal 300 according to an embodiment of the application is shown. As shown in fig. 8, the terminal 300 includes the terminal back cover 100 according to any of the foregoing embodiments.

In some embodiments, as shown in fig. 8, the terminal 300 further includes a battery 150, and the terminal rear cover 100 covers the battery 150 with a predetermined range of gap from the battery 150. When the battery 150 is expanded and deformed, the reserved gap can play a role of buffering to accommodate the increased volume of the battery 150 due to expansion, so as to prevent the battery 150 from extruding the terminal rear cover 100 and avoid the convex deformation of the terminal rear cover 100; and also provides a heat dissipation space for the battery 150 to dissipate heat.

In some embodiments, the terminal 300 further includes a terminal middle frame (not shown) connected to the rim portion 20 of the terminal back cover 100. For example, the connection may be by means of engagement, screwing, caulking, or the like.

The foregoing is a description of embodiments of the present application, and it should be noted that, for those skilled in the art, modifications and variations can be made without departing from the principles of the embodiments of the present application, and such modifications and variations are also considered to be within the scope of the present application.

Claims (16)

1. A terminal back cover, characterized in that the terminal back cover is a transparent or translucent back cover, comprising:

A main body portion including a first outer surface and a first inner surface disposed opposite to each other in a thickness direction of the main body portion, the first inner surface being closer to the terminal center than the first outer surface when the terminal rear cover and the terminal center are in an assembled state;

A rim portion provided at an edge of the main body portion and extending around the main body portion, the rim portion protruding from a first inner surface of the main body portion in a thickness direction of the rim portion;

The thickness of the main body part is smaller than the width of the edge part, and the width direction of the edge part is perpendicular to the thickness direction and the length direction of the edge part; the main body part and the edge part are manufactured through an injection molding process.

2. The terminal rear cover according to claim 1, wherein a ratio of a maximum width of the rim portion to a thickness of the main body portion is greater than or equal to 3.

3. The terminal rear cover according to claim 1, wherein the thickness of the main body portion is greater than or equal to 0.8mm, and the maximum width of the rim portion is greater than or equal to 2.6mm.

4. The terminal back cover according to claim 1, further comprising a mounting portion formed and penetrated in a predetermined area of the main body portion, the mounting portion including one or more functional holes and a supporting portion surrounding the functional holes, the supporting portion having a thickness greater than that of the main body portion, the supporting portion having a thickness direction parallel to that of the main body portion.

5. The terminal rear cover according to claim 4, wherein the one or more functional holes are integrally and symmetrically arranged along a first central axis and/or a second central axis of the main body portion, the first central axis being parallel to a length direction of the main body portion, the second central axis being parallel to a width direction of the main body portion, the width direction of the main body portion being perpendicular to the length direction and the thickness direction of the main body portion.

6. The terminal back cover according to claim 4, wherein the maximum thickness of the support portion is greater than or equal to 2.2mm.

7. The terminal back cover according to claim 4, wherein the supporting portion includes a second outer surface and a second inner surface disposed opposite to the supporting portion in a thickness direction thereof, the second inner surface being closer to the terminal center frame than the second outer surface when the terminal back cover is in an assembled state with the terminal center frame, the second inner surface being farther from the terminal center frame than the first inner surface of the main body portion.

8. The terminal rear cover according to claim 7, wherein the second inner surface is in transitional connection with the first inner surface by a first circular arc and/or the second outer surface is in transitional connection with the first outer surface by a second circular arc, the curvature of the first circular arc being smaller than the curvature of the second circular arc.

9. The terminal rear cover according to claim 1, wherein the rim portion includes a third outer surface and a third inner surface that are disposed opposite to each other, the third outer surface and the first outer surface being connected by a third circular arc transition, and/or the third inner surface and the first inner surface being connected by a fourth circular arc transition, and a curvature of the third circular arc being smaller than a curvature of the fourth circular arc.

10. The terminal rear cover according to claim 1, wherein a ratio of a thickness of the rim portion to a width of the rim portion is less than or equal to 1.5.

11. The terminal back cover according to claim 1, further comprising at least one reinforcing portion provided on the first inner surface of the main body portion, the extending direction of the reinforcing portion being parallel to the length direction of the main body portion.

12. A method for manufacturing a rear cover of a terminal, the method comprising:

integrally injection molding a material to be processed and processing to obtain the terminal rear cover according to any one of claims 1-11;

wherein, in the process of injection molding the material to be processed to form the main body portion and the edge portion, a force is applied to the main body portion in a direction from the first outer surface to the first inner surface of the main body portion, and at least part of the force is used for counteracting internal stress of the main body portion.

13. The method of manufacturing a rear terminal cover according to claim 12, wherein the rear terminal cover includes a mounting portion, the method comprising:

The material to be processed is subjected to injection molding to obtain a rear cover blank, wherein the rear cover blank comprises a main body part, a border part blank and a mounting part blank, the border part blank is formed at the edge of the main body part and extends to encircle the main body part, the border part blank protrudes out of the first inner surface of the main body part along the thickness direction of the border part blank, and the mounting part blank is formed and penetrates through a preset area of the main body part;

Removing a portion of the mounting portion blank to form one or more functional holes and a support portion surrounding the one or more functional holes, the mounting portion including the functional holes and the support portion, and machining the rim portion blank to form the rim portion.

14. The method for manufacturing a rear terminal cover according to claim 13, wherein the injection molding the material to be processed to obtain a rear cover blank comprises:

and heating and melting the material to be processed, enabling the melted material to be processed to flow along a preset path to form a molten liquid flow, and forming the molten liquid flow to obtain the rear cover blank, wherein the front section of the molten liquid flow, which is positioned at the front part in the flowing direction, forms the mounting part blank, and the rear section of the molten liquid flow, which is positioned at the rear part in the flowing direction, forms the main body part and the edge part blank.

15. A terminal comprising a terminal back cover according to any of claims 1-11.

16. The terminal of claim 15, further comprising a battery, wherein the terminal rear cover covers the battery with a predetermined range of gap therebetween.