KR100984158B1 - Set-top-box with common type shield case - Google Patents

Abstract

Disclosed is a set top box having a common shield case for shielding various circuit components mounted in a case. The lower shield case seats a circuit component part including a plurality of PCBs. The upper shield case is coupled to the upper portion of the lower shield case and is coupled to the lower shield case to surround the entire circuit part with the lower shield case. The outer housing is fastened to the outside of the lower shield case and the upper shield case. Therefore, the mold manufacturing cost can be greatly reduced without using an individual shield. In addition, it is easy to change the specifications of the internal components of the set-top box, and save development costs for the new model to facilitate the model upgrade.

Shield, Shielded, Set Top Box, Case

Description

Set-top-box with common type shield case

The present invention relates to a set top box, and more particularly, to a set top box having a common shield case for shielding various circuit components mounted in a case.

Set-top-box is used on a television set and has a home communication terminal function required to use next-generation interactive multimedia communication services such as video on demand (VOD), image home shopping, and network game. The set-top box communicates with a telephone company or a video server installed in a comprehensive cable broadcasting station, and receives and converts video signals. In addition, the set-top box may include a telephone interface or a connection interface function with a PC.

Generally, a set top box includes an external housing, a main printed circuit board (PCB), a hard disk drive (HDD) assembly, and a switching mode pover supply (SMPS) assembly. The external housing is the case of the device, which serves to mount and protect the main PCB, HDD assembly and SMPS assembly inside.

The conventional set-top box has a shield for shielding electromagnetic waves from the main PCB, a shield for shielding electromagnetic waves from the HDD assembly, and a shield for shielding electromagnetic waves from the SMPS assembly. Use each. Such a metal shield covers the outside of each of the main PCB, HDD assembly and SMPS assembly installed inside the outer housing to isolate the inside and the outside of the outer housing. Therefore, electromagnetic waves generated inside the set top box are blocked without being emitted to the outside.

However, the conventional set-top box has been troublesome to mount the shield to each of the main PCB, HDD assembly and SMPS assembly. As a result, it takes a long time to manufacture the shield, and the cost required to manufacture the mold increased.

In addition, when it is necessary to replace the internal parts inside the set-top box for model upgrade, failure, etc., there is a problem that the replacement of parts is difficult and time consuming.

In order to solve such a conventional problem, a common integrated shield is used instead of a separate shield for each of the main PCB, the HDD assembly, and the SMPS assembly mounted inside the outer housing.

A set top box having a plurality of printed circuit boards (PCBs) installed therein, comprising: a lower shield case for seating and fixing a circuit component part, and coupled to an upper portion of the lower shield case and disposed in the set top box together with the lower shield case; Provided is a set-top box having a common shield case including an upper shield case surrounding all of the circuit component parts, and an outer housing fastened to the outside of the lower shield case and the upper shield case.

In this case, the lower shield case may have a bent portion extending upwardly on the bottom surface, and the circuit component part may be grounded by being fastened to the bent portion.

In addition, at least one rigid increase hole is formed in the lower shield case and the upper shield case, and the outer housing may include a rib formed to be coupled to the rigid increase hole.

In addition, a plurality of heat dissipation holes may be formed in the lower shield case and the upper shield case.

In addition, an assembly member having a fitting groove formed on an outer surface of the lower shield case and the upper shield case may be fastened, and a protrusion may be formed to correspond to the fitting groove on the inner side of the outer housing.

Therefore, it is not necessary to mount the shield to the main PCB, the HDD assembly and the SMPS assembly respectively mounted inside the set top box. As a result, the mold manufacturing cost can be greatly reduced.

In addition, it is easy to change the specifications of the internal components of the set-top box, and save development costs for the new model to facilitate the model upgrade.

Hereinafter, the technical configuration of the set-top box having a shared shield case according to the accompanying drawings in detail as follows.

1 is an exploded perspective view of a shield case assembly according to an embodiment, and FIG. 2 is an exploded perspective view of a set top box according to an embodiment.

As shown in FIG. 1 and FIG. 2, the set top box 200 having the common type shield case includes a circuit component part 50, a lower shield case 60, an upper shield case 70, and an external load housing. And 40.

The circuit component unit 50 includes a plurality of PCBs. That is, the circuit component unit 50 may include the main PCB 10, the HDD assembly 20, the SMPS assembly 30, and the like. The circuit component unit 50 is installed inside the set top box and includes all the software and hardware for operating the device.

The lower shield case 60 seats and fixes the circuit component part 50. That is, the lower shield case 60 surrounds the main PCB 10, the HDD assembly 20, and the entire SMPS assembly 30 from the bottom. The shape of the lower shield case 60 is not limited, but is preferably formed to correspond to the inner shape of the outer housing 40 to be described later. The lower shield case 60 is made of a metal material. The lower shield case 60 functions to shield electromagnetic waves emitted from the circuit component part 50 together with the upper shield case 60 to be described later.

The upper shield case 70 is disposed above the lower shield case 60. That is, the upper shield case 70 surrounds the main PCB 10, the HDD assembly 20, and the entire SMPS assembly 30 from the top. As a result, the upper shield case 70 is completely combined with the lower shield case 60 to completely cover the entire outside of the circuit component part 50. The shape of the upper shield case 70 is not limited, but is preferably formed to correspond to the inner shape of the outer housing 40 to be described later. The upper shield case 70 is made of a metal material. The upper shield case 70 is combined with the lower shield case 60 to function to shield electromagnetic waves emitted from the circuit component part 50.

The outer housing 40 is connected to the outside of the lower shield case 60 and the upper shield case 70. The outer housing 40 may be formed of a lower housing 41 and an upper housing 42. The outer housing 40 is preferably made of a synthetic resin material. The outer housing 40 serves to protect the lower shield case 60, the upper shield case 70, and the circuit component part 50. A support member 49 may be further installed below the lower housing 41.

That is, as shown in FIG. 1, the circuit component part 50 including the main PCB 10, the HDD assembly 20, and the SMPS assembly 30 inside the lower shield case 60 and the upper shield case 70. ) To complete the shield case assembly 100. Thereafter, as shown in FIG. 2, the lower housing 41 and the upper housing 42 are fastened to the lower and upper portions of the completed shield case assembly 100 to complete the set top box 200.

In this case, the shield case assembly 100 may further include a front shield case 80 and a rear shield case 90 in addition to the lower shield case 60 and the upper shield case 70. That is, for ease of assembly of the set-top box device, the lower shield case 60 is formed in the shape of "└─ 형", and the upper shield case 70 is the shape of "┌─" which inverts the lower shield case 60 up and down. ┐ "shape. As such, the lower shield case 60 and the upper shield case 70 shield the left, right, up, and down directions of the circuit part 50, and the front shield case 80 of the circuit part 50 The front side may be shielded, and the rear shield case 90 may be implemented to shield the rear side of the circuit component part 50.

The front shield case 80 may fasten the control panel 81 including various buttons on the front surface. In addition, the rear shield case 90 may fasten the blower fan 91, various input / output jack connection units 92, and the like.

In this way, the lower shield so that the main PCB 10 and the HDD assembly 20 and the SMPS assembly 30 constituting the circuit component part 50 respectively surround the entire circuit component part 50 without using a separate shield. The shield function can be shared by providing the case 60 and the upper shield case 70.

Therefore, the effort, time, and cost for individually shielding the main PCB 10, the HDD assembly 20, and the SMPS assembly 30 can be greatly saved. In addition, since it is not required to change the mold due to the replacement of parts due to the development of a new model, it is possible to save development costs and to easily upgrade the model and change specifications.

3 is a cross-sectional view taken along the line A-A of FIG.

As illustrated in FIGS. 1 and 3, the lower shield case 60 may have a bent portion 61 extending upwardly on a bottom surface thereof. The bent portion 61 may be formed to be bent 90 ° in one direction after extending integrally from the bottom of the lower shield case 60 to the top. It is preferable that a plurality of bent portions 61 are formed. The circuit component part 50 may be fastened with a screw 69 in a state of being seated at the bent parts 61. Since the bent part 61 is made of a metal material integrally with the lower shield case 60, the bent part 61 serves to ground the circuit component part 50.

In addition, the circuit component part 50 is installed at a predetermined distance away from the bottom surface of the lower shield case 60, and a predetermined space is secured to the bottom surface of the lower shield case 60. Therefore, the bent portion 61 serves to more securely protect the circuit component portion 50 from external impact. In addition, as a certain space is secured to the bottom surface of the lower shield case 60, the heat radiation effect is increased.

4 is a perspective view illustrating a coupling state of a lower housing and a lower shield case according to another exemplary embodiment.

1 to 4, at least one rigid increase hole 62 may be formed in the lower shield case 60 and the upper shield case 70. In this case, it is preferable that the rib 43 is formed in the outer housing 40.

Rigidity increasing hole 62 is formed long in the shape of a long hole. As described above, a plurality of holes 62 for increasing rigidity are formed in the lower shield case 60 and the upper shield case 70 in parallel. The lower shield case 60 and the upper shield case 70 are easily made thin in consideration of the weight of the entire apparatus. The rigidity increasing hole 62 reinforces the insufficient strength of the lower shield case 60 and the upper shield case 70. Structurally, the plate structure in which holes are formed at appropriate intervals and widths has greater rigidity than the plate structure without holes.

Rib 43 is formed in the outer housing 40, it is fitted into the rigid increase hole 62 is coupled. The rib 43 is formed to correspond to the number, shape, and size of the rigidity increasing hole 62. The rib 43 reinforces the insufficient strength of the outer housing 40 made of a synthetic resin material, and allows the outer housing 40 to be firmly fastened to the lower shield case 60 and the upper shield case 70.

Meanwhile, a plurality of heat dissipation holes 63 may be perforated in the lower shield case 60 and the upper shield case 70. The heat dissipation hole 63 may be formed over the entire surface of the lower shield case 60 and the upper shield case 70. In addition, it is preferable that the heat dissipation hole 47 is also formed in the outer housing 40 fastened to the outside of the lower shield case 60 and the upper shield case 70. In this case, for external beauty, the heat dissipation hole 47 is preferably formed in the lower housing 41.

5 is a cross-sectional view of the set-top box cut horizontally from the top according to another embodiment.

2 and 5, the assembly member 95 may be fastened to the outer surfaces of the lower shield case 60 and the upper shield case 70. The fitting groove 96 is formed in the assembly member 95. In this case, the protrusion 46 is formed on the inner surface of the outer housing 40. The protrusion 46 is formed to correspond to the fitting groove 96 to be coupled to the fitting groove 96.

That is, the assembly member 95 is screwed to the outer surface of the lower shield case 60 and the upper shield case 70. In place of the assembly member 95, a recessed recessed fitting groove 96 is formed. A protrusion 46 corresponding to the fitting groove 96 is formed on the inner surface of the outer housing 40. More preferably, the fitting portion 44 may be formed on the inner surface of the outer housing 40 so that the outer housing 40 and the upper and lower shield cases 60 and 70 are more firmly fastened. The fitting portion 44 is formed larger than the circumference of the protrusion 46. As a result, the protrusion 46 is fitted into the fitting groove 96, and a part of the assembly member 95 in which the fitting groove 96 is formed is fitted into the fitting portion 44. In other words, the outer housing 40 and the upper and lower shield cases 60 and 70 are firmly fixed in two.

Accordingly, after the circuit part 50 is installed in the lower shield case 60 and the upper shield case 70 to complete the shield case assembly 100, the lower housing 41 and the upper housing 42 are easily installed. ) May be assembled with the shield case assembly 100. Since the outer housing 40 is made of a synthetic resin material, the protrusion 46 is elastically fitted into the fitting groove 96 so that the shield case assembly 100 and the outer housing 40 are coupled to each other.

Set-top box having a common shield case has been described with reference to the embodiment shown in the drawings, but this is only an example, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope should be defined by the technical spirit of the appended claims.

1 is an exploded perspective view of a shield case assembly according to one embodiment.

2 is an exploded perspective view of a set-top box according to an embodiment.

3 is a cross-sectional view taken along the line A-A of FIG.

Figure 4 is a perspective view showing a coupling state of the lower housing and the lower shield case according to another embodiment.

5 is a cross-sectional view cut horizontally from the top of the set-top box according to another embodiment.

<Description of the symbols for the main parts of the drawings>

10: main PCB 20: HDD assembly

30: SMPS assembly 40: external housing

43: rib 46: protrusion

50: circuit part 60: lower shield case

61: bend portion 62: rigid increase hole

63: heat dissipation hole 70: upper shield case

95: assembly member 96: fitting groove

200: set top box

Claims (5)

A circuit component part including a plurality of PCBs is installed therein, the lower shield case made of a metal material seated and fixed to the circuit component part, and coupled to an upper portion of the lower shield case, and set-top box together with the lower shield case. In the set-top box having a common shield case including an upper shield case of a metallic material surrounding the entire circuit component portion disposed inside, and an outer housing fastened to the outside of the lower shield case and the upper shield case, An assembly member having a fitting groove formed on the outer surface of the lower shield case and the upper shield case is fastened, Set-top box having a common shield case formed on the inner side of the outer housing and the protrusion corresponding to the fitting groove. delete delete delete delete

Images