KR101264103B1

KR101264103B1 - Inner frame for mobile terminal

Info

Publication number: KR101264103B1
Application number: KR1020120090711A
Authority: KR
Inventors: 박현숙
Original assignee: 주식회사 영진전기; 주식회사 성덕전자
Priority date: 2012-08-20
Filing date: 2012-08-20
Publication date: 2013-05-14

Abstract

The present invention can be manufactured in a very thin while maintaining the required strength by changing the material and structure of the seat frame made of a conventional magnesium alloy or a single steel material, simplifying the manufacturing process suitable for mass production, heat dissipation at a smaller weight The internal frame of the portable terminal having better performance, which is installed between the front case and the rear case, the display panel is fixedly coupled to the front, the plate-shaped seat frame coupled to the motherboard and the battery, respectively, and the seat In the inner frame of the portable terminal including a border frame coupled to the circumference of the frame and the front case and the rear case is fixedly coupled, the seat frame is made of aluminum (Al) or copper (Cu) of the front Laminated layered front sheet and rear plated sheet of steel The rear sheet has a chip seating hole formed at a position where the chip mounted on the main board is in contact, and a battery seating hole is formed at the position where the battery is in contact with each other.

Description

Internal frame of mobile terminal {INNER FRAME FOR MOBILE TERMINAL}

The present invention is installed between the display panel and the main board constituting the portable terminal, the internal frame of the portable terminal to dissipate heat generated from the various electronic components and the display panel mounted on the main board while supporting the display panel and the main board, respectively It is about.

With the development of electric and electronic technology, communication equipment has been miniaturized and the development of mobile communication technology has improved the mobility of communication equipment, which makes it possible for modern people to conveniently carry various portable terminals for communication such as PDA and mobile phone. .

Such a portable terminal may be a folder type, a flip type, a slide type, a swing type, a respective complex type according to the coupling and opening / closing method of the main body and the display unit. It can be classified into a portable terminal such as a bar type.

As generations of electric and electronic technologies and mobile communication technologies have evolved, portable terminals have performed various additional functions as so-called in-hand computers beyond the communication means of remote use. In other words, it adds a camera function by attaching a high-definition digital camera, and due to the development of memory technology, it is equipped with high-capacity memory to play MP3, various games and movies, and other complex such as GPS or online communication. The era of so-called smartphones, functional phones, has opened.

In particular, due to the touch screen technology, a keyboard provided with a plurality of buttons, which is essentially provided in a main body of a conventional portable terminal, is missing, and a bar type among the various types of portable terminals described above is prevalent. This is because a wider display panel is needed instead of a separate keyboard, and the addition of many functions increases the motherboard equipped with the CPU and various chips.

1 is a perspective view illustrating a general portable terminal, FIG. 2 is an exploded perspective view illustrating an embodiment of FIG. 1, FIG. 3 is an exploded perspective view of an internal frame in the embodiment of FIG. 2, and FIG. 4 is an embodiment of FIG. 3. The actual perspective view of the inner frame in the example, Figure 5 is a rear view of the embodiment of FIG.

As shown in FIGS. 1 and 2, the portable terminal 1 is generally installed between the front case 10 and the rear case 20, the front case 10 and the rear case 20, and the front case 10. The display panel 31 is fixedly coupled to the rear panel and includes a main frame 32 and an internal frame 30 to which the battery 33 is coupled. Of course, although not shown in the drawing, a connector (not shown) for connecting the display panel 31, the main board 32, and the battery 33, which are coupled to the front and rear surfaces of the internal frame 30, respectively, is provided.

The inner frame 30 of the above-described portable terminal 1 is a plate-like sheet on which a display panel 31 is seated on a front surface, and a main board 32 and a battery 33 on the rear thereof are coupled. The frame 30a is coupled to the periphery of the seat frame 30a, and the front case 10 and the rear case 20 are composed of an edge frame 30b fixedly coupled thereto.

In order to manufacture the thin portable terminal 1 according to the flow of time, the inner frame 30 configured as described above, of course, the inner frame 30 also has to be formed to be ultra thin, and also the thin portable terminal 1 falls. The strength of the inner frame 30 should also be good so as not to be damaged by the impact. In addition, the seat frame 30a of the inner frame 30, in particular, the display panel 31, the main board 32 and the battery 33 on which various chips 32a are mounted are coupled to contact should be good heat dissipation performance. That is, the inner frame 30 should be formed to be ultra-thin, and should have good strength to withstand the drop impact, and excellent heat dissipation performance.

In the configuration of the inner frame 30, the frame 30b is a synthetic resin material, which is integrally injection molded using the seat frame 30a as an insert. At this time, the material of the seat frame (30a) of the inner frame 30, as known in the prior art mainly uses a non-ferrous metal alloy (Mg-Al-based alloy) mainly composed of magnesium (Mg) and aluminum.

Pure magnesium is very active and has a high risk of ignition during processing such as casting and polishing, and general characteristics such as strength and corrosion are not suitable for use as structural materials. Has an advantage.

For example, the addition of aluminum to the magnesium alloy can improve the mechanical properties, the addition of Mn can not only improve the corrosion resistance, but also reduce the amount of addition of Fe, Cu, Ni by the amount, the addition of Ag, the heat resistance strength When Zn is added, corrosion resistance and strength are improved, and when Si is added, creep strength is improved, and when Zr is added, grains can be made small. Moreover, the addition of rare earth elements to magnesium improves casting properties and prevents oxidation during melting and casting, whereby rare earth elements improve strength.

The magnesium alloy to which the various elements described above are added has excellent castability and excellent dimensional stability, maintains a relatively high strength, and has excellent thermal conductivity compared to synthetic resins, thereby effectively dissipating internal heat according to long-term use. It is utilized in the seat frame (30a) of the configuration of the inner frame (30).

After the sheet frame 30a made of magnesium alloy is manufactured by die casting, which is a precision casting method, the inner frame 30 is formed by insert injection molding the frame frame 30b made of synthetic resin using the manufactured seat frame 30a as an insert. It is made in one piece.

However, when fabricating the seat frame 30a of the inner frame 30 by magnesium alloy, the production cost is too expensive to form an alloy by adding rare earth elements or other nonferrous metals, and furthermore, the seat frame 30a No matter how ultra-thin manufacturing, the thickness should be 0.8mm in order to meet the minimum required strength, there is a problem that can not be reduced to less than that.

In order to solve the problem of manufacturing the seat frame 30a, there is a movement to use SUS (Stainless Use Steel) material. That is, the steel material can significantly reduce the production cost than the magnesium alloy, it can meet the minimum required strength even with a much thinner thickness, because it is less than the magnesium alloy, but the heat dissipation performance is also secured as a metal material.

Therefore, as shown in FIGS. 4 and 5, the sheet frame 30a is made of steel to be manufactured to be ultra thin, and to secure the required strength while lowering the production cost, and also to provide heat dissipation performance.

However, such a steel seat frame 30a also has problems. First, as shown in FIG. 5, the chip recess groove 30a-1 or the battery in which various chips 32a of the main board 32 are in contact with each other. The addition of another process of separately performing an etching process by chemicals to form the battery recessed grooves 30a-2 to which the 33 contacts, and various chips 32a recently mounted on the main board 32 The higher the degree of integration, the poorer the heat dissipation performance due to high heat, and a thinner than magnesium alloy, but has a fatal problem that the weight is bound to be larger.

The object of the present invention devised to solve the above problems is to change the material and structure of the seat frame made of a conventional magnesium alloy or a single steel material, while maintaining the required strength can be manufactured in a very thin, mass production To simplify the manufacturing process, and to provide a lower weight and more excellent heat dissipation performance of the internal frame of the portable terminal.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

In order to achieve the above object, the internal frame of the portable terminal according to the present invention is installed between the front case and the rear case, the display panel is fixedly coupled to the front, the back of the motherboard and the battery is coupled to each other In an internal frame of a portable terminal comprising a seat frame and a frame coupled to the periphery of the seat frame and the front case and the rear case is fixedly coupled, the seat frame, the front of the aluminum (Al) or copper (Cu) plate-shaped front sheet and a rear plate-shaped rear sheet made of steel (steel) is a laminated structure, the rear sheet, the chip seating hole in the position where the chip mounted on the main board contact The through hole is formed, and the battery seating holes are formed through the respective positions where the battery contacts.

In addition, the front sheet, the plurality of rivet projections are formed in the annular projection on the surface facing the rear sheet, the rear sheet, a plurality of rivet coupling holes so that each of the rivet projection of the front sheet penetrates and inserted. It is formed through each, and the front sheet and the back sheet, characterized in that each of the rivet projections are laminated by the mutual pressing, after each of the rivet protrusions are inserted into the rivet coupling holes are each riveted.

In addition, the battery seating hole is installed on the rear sheet along the periphery of the battery seating hole of the rear sheet, the battery fixture made of a steel material welded to the rear sheet through a flange formed at the bottom to fix the outer periphery of the battery; Characterized in that.

In addition, the border frame is produced by laminating the front sheet and the rear sheet of the sheet frame, characterized in that the injection molding integrally with the seat frame as an insert.

In addition, the seat frame is characterized in that the total thickness is 0.4mm with each of the front sheet and the rear sheet to 0.2mm.

The inner frame of the portable terminal according to the present invention, by changing the material and structure of the seat frame made of a conventional magnesium alloy or a single steel material to a layer structure of the front sheet and the rear sheet through the rear sheet made of steel material While maintaining the strength, it is possible to reduce the production cost compared to magnesium alloy and at the same time make it ultra-thin, and the heat dissipation performance is reduced even at a small weight through the front sheet made of aluminum or copper than the conventional seat frame made of a single steel material. Excellent effect.

In addition, it is possible to simplify the manufacturing process suitable for mass production by performing the riveting process by pressing the bonding process according to the layer of the front sheet and the rear sheet to manufacture the seat frame.

In particular, the steel fasteners can be easily welded to the steel back sheet, and the battery seating holes are formed in advance when the rear sheet is manufactured. By forming the chip mounting holes together, it is possible to omit the conventional etching process without having to perform separately, thereby further improving productivity.

1 is a perspective view showing a typical portable terminal,
FIG. 2 is an exploded perspective view illustrating the embodiment of FIG. 1.
Figure 3 is an exploded perspective view of the inner frame of the embodiment of Figure 2,
4 is an actual perspective view of the inner frame of the embodiment of FIG. 3,
5 is a rear view of the embodiment of FIG. 4,
6 is a perspective view showing an embodiment of an internal frame of a portable terminal according to the present invention;
7 is a perspective view illustrating a state in which the battery fixture is welded to the seat frame as a rear view of the embodiment of FIG. 6;
FIG. 8 is an exploded perspective view of the seat frame in the embodiment of FIG. 7;
9 is a perspective view illustrating a laminated state of a sheet frame in the embodiment of FIG. 8,
FIG. 10 is a perspective view illustrating a rivet coupling state by pressing the seat frame in the embodiment of FIG. 9;
FIG. 11 is a perspective view illustrating a state in which the frame is injection molded using the seat frame as an insert in the embodiment of FIG. 10.
12 is a perspective view illustrating a process of coupling the battery fixture to the seat frame in the embodiment of FIG.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the internal frame of the portable terminal according to the present invention.

The inner frame of the portable terminal according to the present invention, as shown in Figures 6 to 12, including the seat frame 100, the border frame 200, may further include a battery fixture (300). In addition, the seat frame 100 is composed of a front sheet 110 and a rear sheet 120.

First, the inner frame 30 of the portable terminal according to the present invention, as shown in Figs. 6 and 7 with reference to Figs. 1 and 2, as a configuration of the portable terminal 1, the front case 10 and the rear case 20 Installed between the panel, the display panel 31 is fixedly coupled to the front surface, and the plate-shaped sheet frame 100 to which the main board 32 and the battery 33 are respectively coupled to the rear, and the seat frame 100 of the It is coupled along the circumference includes a front frame 10 and the rear case 20 is a frame frame 200 is fixedly coupled. That is, the present invention among the front case 10, the rear case 20, the display panel 31, the main board 32, the battery 33 and the internal frame 30, which is each component of the portable terminal 1 It relates to the frame 30, and more particularly to the change of the material and structure of the seat frame 100 among the seat frame 100 and the border frame 200 of the configuration of the inner frame 30.

The seat frame 100 of the inner frame 30 of the portable terminal 1 according to the present invention is a plate-shaped front sheet 110 made of aluminum (Al) or copper (Cu) of the front as shown in FIG. ) And a plate-shaped back sheet 120 made of steel at the rear is laminated. The rear sheet 120 at the rear of the seat frame 100 is made of a steel material to ensure the required strength, the front sheet 110 disposed on the front is, as well as the front display panel 31, the rear sheet to be described later The chip seating hole 121 and the battery seating hole 122 of 120 are also in contact with the main board 32 and the battery 33 in the rear, respectively, and are responsible for dissipating heat generated.

Even if the sheet frame 100 is manufactured in a laminated structure of the front sheet 110 and the rear sheet 120 as described above, the heat dissipation performance is excellent while having a low-weight ultra-thin structure. For example, in the case of the conventional magnesium alloy has a thickness of 0.8mm to secure the required strength, in the case of a single steel material can be secured the required strength with only a thickness of about 0.4mm, but the weight is increased, there is a problem in heat dissipation performance. However, in the case of the seat frame 100 of the present invention by making the thickness of the front sheet 110 and the rear sheet 120 each 0.2mm, the total thickness is manufactured to be ultra-thin 0.4mm. Accordingly, the heat dissipation performance is further improved while reducing the weight through the front sheet 110 made of aluminum or copper while securing the required strength through the rear sheet 120 made of steel. On the other hand, if the front sheet 110 is made of an alloy of aluminum and copper alloy can be divided into a case, if the front sheet 110 is made of aluminum, the heat dissipation performance is better than the copper material, but the strength is Copper is better. In this regard, if the material of the front sheet 110 is more important for the heat dissipation performance, it is better to use the aluminum material, and if the strength is more important, a copper material may be used.

At this time, the chip 32a or the battery 33 of the main board 32 shown in FIG. 2 is infiltrated into the seat frame 100, which is a heat dissipation function due to thinning and contact of the portable terminal 1. Structure to secure. To this end, a groove in which the chip 32a or the battery 33 of the main board 32 is recessed to be seated is required at the surface where the main board 32 and the battery 33 of the seat frame 100 are coupled. Conventionally, in order to form such recessed grooves, an etching process using chemicals is essential in the case of a single steel material. However, since the seat frame 100 of the present invention is made of a laminated structure of the front sheet 110 and the rear sheet 120, groove processing is performed on the rear sheet 120 to which the main board 32 and the battery 33 are coupled. If the through-hole is not formed in advance, it is as if the recessed groove in which the main board 32 and the battery 33 is seated is formed. That is, as illustrated in FIGS. 7 to 12, the rear seat sheet 120 has a chip mounting hole 121 formed therethrough at a position where the chip 32a mounted on the main board 32 is in contact with each other. The battery seating holes 122 are respectively penetrated at positions 33). Accordingly, the chip 32a of the main board 32 penetrates into the chip seating hole 121 of the rear sheet 120 to contact the front sheet 110, and the battery 33 is also the rear sheet 120. Intrudes into the battery seating hole 122 and contacts the front sheet 120.

When forming the layer structure of the sheet frame 100 as described above, a coupling form suitable for mass production is required by simplifying the process. The front sheet 110 and the rear sheet 120 of the seat frame 100 should be permanently coupled once combined, there will be various coupling methods for this. For example, there may be bonding, welding or bolting, but considering that each sheet is ultra-thin, thermal deformation should not occur after joining, and the joining process should be made quickly and accurately. To this end, in the present invention, each sheet is integrated through riveting by pressing. That is, as shown in FIG. 8, the front sheet 110 has a plurality of annular rivet protrusions 111 protruding from the surface facing the rear sheet 120, and the rear sheet 120 has the front surface. A plurality of rivet coupling holes 123 are formed to penetrate through the rivet protrusions 111 of the sheet 110, respectively. That is, the rivet protrusion 111 and the rivet coupling groove 123 are formed in advance in the production of the front sheet 110 and the rear sheet 120. Thereafter, as shown in FIGS. 9 and 10, the front sheet 110 and the rear sheet 120 are stacked by pressing each other, and then each of the rivet protrusions 111 is inserted into the rivet coupling groove 123. Each is riveted together.

As shown in FIG. 10, a seat frame 100 having a layer structure formed by riveting the front sheet 110 and the rear sheet 120 is manufactured, and the seat frame 100 manufactured as shown in FIG. 11. Along the circumference of the border frame 200 is coupled. The bonding process of the border frame 200 is the same as the conventional. That is, the frame frame 200 is produced by layering the front sheet 110 and the rear sheet 120 of the sheet frame 100, and then integrally injection molded using the sheet frame 100 as an insert. It is. Therefore, the inner frame 30 according to the present invention is made by integrally manufacturing the edge frame 200 to the seat frame 100 by insert injection molding.

Meanwhile, the battery fixing tool 300 may be further included to fix the battery 33 seated in the battery seating hole 122 of the seat frame 100. At this time, the battery fixture 300 is conventionally made of a steel material to firmly support and fix the battery 33. If so, the battery fixing device 300 is preferably welded to the rear sheet 120 made of steel, in which the outer circumferential direction along the periphery of the battery seating hole 122 previously formed through the rear sheet 120 described above. It should be coupled on the backsheet 120.

That is, as shown in FIGS. 7 and 12, the battery fixing tool 300 is made of steel and is installed on the rear sheet 120 along the periphery of the battery seating hole 122 of the rear sheet 120. 33 is welded to the rear sheet 120 through a flange 310 formed at the bottom to fix the outer periphery of the 33. Therefore, the welding coupling of the battery fixture 300 and the rear sheet 120 of the same material will be easily made, in this case is welded to the rear sheet 120 through the flange 310 on the bottom of the battery fixture 300. However, when welding the thin plate in a narrow space, the welding of the flange 310 of the battery fixture 300 and the back sheet 120 is performed through spot welding. Such a spot welding part 315 is illustrated in FIG. 7. .

As described above, the inner frame 30 of the portable terminal 1 according to the present invention, the front sheet 110 and the rear sheet 120 to the material and structure of the seat frame made of a conventional magnesium alloy or a single steel material It is possible to manufacture ultra-thin at the same time, while reducing the production cost compared to magnesium alloy while maintaining the required strength through the rear sheet 120 made of steel material by changing to a layer structure of), the conventional seat frame made of a single steel material Through the front sheet 110 made of aluminum or copper material, the heat dissipation performance is excellent even at a small weight.

In addition, the fabrication process according to the layer of the front sheet 110 and the rear sheet 120 in order to manufacture the sheet frame 100 through the riveting by pressing can simplify the manufacturing process suitable for mass production.

In particular, the steel fastener 300 of the steel material can be easily welded to the rear sheet 120 made of steel, of course, when forming the rear seat 120 through the battery seating hole 122 in advance At the same time, through the chip mounting hole 121 through which the chip 32a of the main board 32 is contacted together, it is possible to omit the conventional etching process without having to perform a separate process, thereby further improving productivity. You can.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

1: portable terminal
10: front case
20: rear case
30: internal frame 31: display panel
32: motherboard 32a: chip
33: battery
100: seat frame
110: front sheet 111: rivet protrusion
120: rear seat 121: chip seating hole
122: battery mounting hole 123: rivet coupling hole
200: border frame
300: battery fixture
310: flange 315: spot weld

Claims

It is installed between the front case and the rear case, the display panel is fixedly coupled to the front, the plate-shaped seat frame coupled to the motherboard and the battery on the rear, respectively, coupled along the periphery of the seat frame and the front case and the rear case In the internal frame of the portable terminal comprising a frame fixed to each fixed,
The seat frame,
Laminated structure of front plate made of aluminum (Al) or copper (Cu) in front and plate back sheet made of steel (back)
The rear sheet,
Chip seating holes are formed through the chip mounting holes in the main board contact, the battery seating holes are formed through the battery contact holes, respectively
The front sheet,
A plurality of annular rivet protrusions protrudingly formed on the side facing the rear sheet,
The rear sheet,
A plurality of rivet coupling holes are formed to penetrate through the rivet protrusions of the front sheet, respectively.
The front sheet and rear sheet,
The inner frame of the portable terminal, characterized in that each of the rivet protrusions are laminated by the mutual pressing and inserted into the rivet coupling hole and then riveted respectively.

delete

The method of claim 1,
The battery seating hole is installed on the rear sheet along the periphery of the battery seating hole of the rear sheet and is welded to the rear sheet through a flange formed at the bottom to fix the outer periphery of the battery. Internal frame of the portable terminal characterized in that.

The method of claim 1,
The border frame is,
After fabricating the front sheet and the rear sheet of the sheet frame by lamination, the internal frame of the portable terminal, characterized in that the injection molding integrally with the seat frame as an insert.

The method of claim 1,
The seat frame,
The inner frame of the portable terminal, characterized in that the total thickness is 0.4mm with each of the front sheet and the rear sheet to 0.2mm.