KR-20260065446-A - A frame for a portable terminal combining a ring member with a casting bracket

KR20260065446AKR 20260065446 AKR20260065446 AKR 20260065446AKR-20260065446-A

Abstract

The present invention relates to a frame for a mobile terminal that combines a ring member with a casting bracket, comprising: a ring member formed into a square shape by rolling, drawing, or extruding a circular wire and segmented into two or more parts; and a casting bracket formed through a die-casting process and joined to the outer edge of the ring member by welding. By laser welding the casting bracket, which has a minimized amount of processing, to the surface of the ring member, which is formed by bending and cutting a square wire using dedicated equipment, the processing process can be minimized and manufacturing costs can be reduced.

Inventors

김재훈
이동근

Assignees

주식회사 케이에이치바텍

Dates

Publication Date: 20260508
Application Date: 20241209
Priority Date: 20241101

Claims (7)

A ring member formed into a square shape from a circular wire by rolling, drawing, or extrusion, and segmented into two or more parts; and A frame for a mobile terminal having a ring member attached to a casting bracket, characterized by being manufactured through a die-casting process and including a casting bracket in which the ring member is joined to the outer edge by welding.
In claim 1, The above ring member is, A frame for a mobile terminal having a ring member coupled to a casting bracket characterized by having an overall rectangular shape, being segmented into two or more parts, and having two or fewer bent parts per segment.
In claim 1, The above ring member is, A frame for a mobile terminal having a ring member coupled to a casting bracket characterized by having an overall rectangular shape, being segmented into four parts, and having one or fewer bent portions per segment.
In claim 1, A concave slot is formed on the inner surface of the above ring member, and A welding surface inserted into the slot is formed on the edge of the above casting bracket, and A frame for a mobile terminal having a ring member coupled to a casting bracket, characterized by coupling the ring member and the casting bracket by welding the welding surface to the slot.
In claim 4, The above-mentioned welded surface is formed on the entire or partial section of the rim of the above-mentioned casting bracket, and a reinforcing rim surface is formed on the inner side of the severed section of the above-mentioned welded surface to supplement structural strength. A frame for a mobile terminal having a ring member coupled to a casting bracket, characterized in that the thickness of the welded surface is 0.4 mm to 1.2 mm.
In claim 1, The above rectangular wire is bent and cut using a dedicated bending and cutting device, The above bending and cutting device is, The above rectangular wire is aligned in the correct position, and is first bent 90° at a designated length to form one bent section, and The above wire is bent 90° a second time at a specified length to form two bent sections, and A frame for a mobile terminal having a ring member attached to a casting bracket, characterized by moving the above-mentioned wire from a bent position to a specified distance and then segmenting it.
In claim 1, A frame for a mobile terminal having a ring member coupled to a casting bracket, characterized in that a boss is formed in the casting bracket and a hole into which the boss is pressed is formed in the ring member to enable an interference fit.

Description

A frame for a portable terminal combining a ring member with a casting bracket The present invention relates to a frame for a mobile terminal in which a ring member is combined with a casting bracket, and more specifically, to a frame for a mobile terminal in which a casting bracket with a ring member is laser welded to the surface of a ring member, which is formed by bending and cutting a circular wire into a square shape using dedicated equipment, thereby minimizing processing steps and reducing manufacturing costs. As numerous features are added to current smartphones, high-performance CPUs and various chips are installed, causing the size of the mainboard to increase and the size of the display panel to expand. As the size of the display panel and mainboard increased, the flat bracket frame supporting the display panel and mainboard inside the smartphone was formed from metal materials such as zinc alloy, aluminum alloy, and magnesium alloy in order to dissipate heat generated inside the smartphone to the outside, and the housing frame, which forms the bezel exposed to the outside of the smartphone and protects internal components from external impact, was subjected to technology to apply various colors to give the exterior shape a luxurious feel. A smartphone according to the prior art utilized a method in which, in order to realize a color on the surface of a housing frame, a housing frame was formed by insert injection molding plastic onto the outer edge of a bracket frame formed of metal, and then a surface treatment process of the housing frame was performed using a vacuum deposition method or the like. However, when the housing frame exposed to the outside of the smartphone is formed of plastic as in the past, not only is it difficult to maintain the strength required to protect internal components, but there was also a problem in that the heat dissipation efficiency for releasing heat generated internally to the outside was lower compared to the metal material constituting the bracket frame. To solve these problems, Korean Registered Patent Publication No. 10-1717545 (March 17, 2017) discloses a metal frame for a mobile communication terminal manufactured using an extrusion process and a die-casting mold. The metal frame for a mobile communication terminal manufactured using the above-described extrusion and die-casting molds is configured to reduce manufacturing costs by minimizing CNC machining. This is achieved by machining a square pipe-shaped metal body formed by an extrusion process to form a rectangular housing frame exposed to the outside of the mobile communication terminal, inserting the housing frame into a die-casting mold, and then forming a bracket frame that supports the display panel and main board of the mobile communication terminal using a die-casting method. However, in the case of metal frames for mobile communication terminals manufactured using the aforementioned extrusion and die-casting molds, the bracket frame formed by the die-casting method still requires a significant CNC machining process to process detailed shapes, and there is a problem in that deformation and defects occur on the metal surface when the housing frame is inserted into the die-casting mold to form the bracket frame by the die-casting method, as the housing frame is exposed to the high-temperature environment caused by die-casting. FIG. 1 is a drawing illustrating the manufacturing process of a ring member and a casting bracket according to an embodiment of the present invention. FIG. 2 is a drawing illustrating the manufacturing process of a ring member and a casting bracket according to another embodiment of the present invention. FIG. 3 is a perspective view showing the welded portion of the ring member and the casting bracket illustrated in FIG. 1. FIG. 4 is a drawing of a device for bending and cutting a rectangular wire according to the present invention. FIG. 5 is a drawing showing the work process of the bending and cutting device of FIG. 4. FIG. 6 is a drawing illustrating the welding process of the present invention, FIG. 7 is a plan view of the casting bracket illustrated in FIG. 1, FIG. 8 is a planar perspective view of the casting bracket illustrated in FIG. 1, FIG. 9 is data testing the adhesion strength of the welded surface illustrated in FIG. 1. FIG. 10 is a perspective view showing another embodiment of the combined structure of a ring member and a casting bracket, FIGS. 11 and FIGS. 12 are perspective views illustrating the case where the boss and the hole are each square. FIGS. 13 and FIGS. 14 are perspective views illustrating cases where the boss and the hole are each circular. Hereinafter, a frame for a mobile terminal in which a ring member is coupled to a casting bracket of the present invention and a mobile terminal frame manufactured according to the same will be described in detail. FIG. 1 is a drawing illustrating the manufacturing process of a ring member and a casting br