Mobile terminal and housing assembly thereof

Abstract

The present application provides a mobile terminal and a housing assembly thereof, and the housing assembly includes a middle frame and a sound chamber cover. The middle frame includes a mainboard body and a side plate body, and the mainboard body includes a first surface, a second surface and a plurality of side surfaces, wherein the first and second surfaces are opposite to each other, and the side surfaces are connected with the first surface and the second surface. The first surface is provided with an annular boss, and the annular boss forms a sound chamber region through enclosing, wherein the sound chamber cover abuts against the top surface of the annular boss to form a sound chamber of a loudspeaker together with the middle frame. The top surface of the annular boss is connected with at least one side surface of the mainboard body, and the inclined angle between the side surface and the top surface of the annular boss is an obtuse angle, and the side surface is provided with adovetail-shaped slot. The side plate body is provided with a dovetail-shaped convex portion, and the convex portion cooperates with the dovetail-shaped slot to realize the connection between the mainboard body and the side plate body. The structure of the housing assembly can ensure the flatness of the top surface of the annular boss of the mainboard body, so that the middle frame can abut against the sound chamber cover to form a sealed sound chamber, thereby ensuring the sound effect of the mobile terminal speaker located in the sound chamber.

Description

technical field [0001] The present invention relates to the technical field of mobile terminal equipment structure, in particular to a mobile terminal and its casing assembly. Background technique [0002] Most of the middle frames of mobile terminal equipment are integrally injection-molded by metal plates and plastic frames (because the material cost of the middle frame of the integrated metal structure is high, and CNC processing is difficult, the process is complicated, and the product yield is low), metal plates and plastic frames The injection molding connection position of the frame is often the sealing position where the middle frame and other components (such as the middle frame bracket or the rear shell, etc.) form the sound cavity of the mobile terminal speaker. [0003] As we all know, in the process of integral injection molding, there will generally be a step difference at the connection position (the step difference refers to the deviation of the matching surf...

AI Technical Summary

Problems solved by technology

[0004] If the connection position of the injection molding is located on the sealing surface, whether it is a surplus or a deficit, the sealing surface will be uneven. The uneven sealing surface will have a serious impact on the sealing of the sound cavity. If the sound cavity is not well sealed, it will cause sound leakage from the speaker and Problems such as timbre distortion seriously affect the user experience of mobile terminal equipment

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