Metal-plastic double-layer mobile phone shell and manufacturing method thereof

Abstract

The invention discloses a metal-plastic double-layer mobile phone shell. The metal-plastic double-layer mobile phone shell comprises a plastic back cover and a metal back cover. The plastic back cover comprises an upper part, a lower part and a middle part; the upper part and the lower part respectively comprise a plastic back cover frame which is bent downwards and has the upper surface protruding out of the middle part; and middle frames which are bent downwards are located at the two sides of the middle part, and multiple auxiliary positioning parts which extend in the horizontal direction are distributed at the lower ends of the middle frames. The metal back cover comprises a primary back plate and metal back cover frames which are bent downwards from the two sides of the main back plate; and the lower ends of the metal back cover frames are butted against the auxiliary positioning parts. The plastic back cover and the metal back cover of the double-layer mobile phone shell are precisely positioned in a Z direction.

Description

technical field [0001] The invention relates to a manufacturing technology of a mobile phone case, in particular to a method for manufacturing a metal-plastic double-layer mobile phone case. Background technique [0002] Since the birth of the mobile phone, its appearance has been as important as its own function. In order to apply the metal body solution to mobile phones at a lower cost, aluminum-magnesium alloy stamping is often used to form the mobile phone casing. However, this solution may often cause the problem of weak antenna signals. For this reason, a metal-plastic double-layer shell with a large metal back cover in the middle and plastic back covers at both ends is used, and the plastic at both ends is used as the antenna realization area. This design not only ensures the large metal texture when the user holds the mobile phone, but also maintains a better antenna signal. [0003] In the prior art, the stamped metal back cover is covered on the plastic back cove...

AI Technical Summary

Problems solved by technology

[0004] In the process of assembly, due to the weak strength of the plastic back cover, it is easy to deform, the tolerance of the fixture itself and the influence of assembly error factors will lead to inaccurate positioning in the Z direction during the mating process between the plastic back cover and the metal back cover, and uneven product gaps. , resulting in a small gap between the plastic back cover and the metal back cover, which ultimately affects the appearance of the product

[0005] In addition, because usually the inner surface of the metal back cover is also formed with a buckle for engaging with the mobile phone body, the above-mentioned inaccurate positioning in the Z direction will also lead to unstable position and dimension of the buckle in the Z direction, affecting the overall assembly of the product

The above-mentioned assembly problems directly affect the user experience in the end, resulting in the risk of a decline in the overall user experience of the product and affecting product reputation

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