CN210629968U

CN210629968U - Waterproof circuit board for set top box

Info

Publication number: CN210629968U
Application number: CN201921657507.9U
Authority: CN
Inventors: 艾朝南; 蔡国辉
Original assignee: Dongguan Nuozheng Electronics Co ltd
Current assignee: Dongguan Nuozheng Electronics Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-26
Anticipated expiration: 2029-09-30

Abstract

The utility model provides a waterproof circuit board for a set-top box, which comprises a circuit board, wherein the circuit board comprises an upper layer board, a heat conducting insulating layer and a lower layer board which are arranged from top to bottom in sequence, the upper end and the lower end of the upper layer plate are respectively provided with a first outer layer circuit and a first inner layer circuit, the upper end and the lower end of the lower layer plate are respectively provided with a second inner layer circuit and a second outer layer circuit, a chip groove is arranged on the upper plate, a chip is arranged on the chip groove, pins of the chip are electrically connected with the first outer layer circuit, the upper plate is also provided with two grooves which are respectively positioned at two sides of the chip groove, the surface of the first outer layer circuit, the surface of the chip and the surface of the groove are covered with a layer of first waterproof paint, a honeycomb-shaped water absorption block is placed in the groove, and the bottom of the groove is connected with a drain hole which penetrates through the heat conduction insulating layer and the lower layer plate. The utility model provides a waterproof type circuit board is applicable to the STB, and waterproof performance is excellent.

Description

Waterproof circuit board for set top box

Technical Field

The utility model relates to a circuit board technical field, concretely relates to waterproof type circuit board for STB.

Background

The network set-top box is a vital technical device in the current information household appliances. To date, the functionality of set-top boxes has been stepped up from a multi-frequency tuner and decoder to a control terminal for a large number of online databases of movies, multimedia events, news, etc.

The circuit board is an important part of the set-top box, and the quality of the circuit board influences the function of the set-top box. For the set-top box, the waterproof capability is required to be stronger, but the waterproof requirement of the common circuit board cannot be met.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a waterproof type circuit board for STB, waterproof performance is excellent.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a waterproof type circuit board for STB, includes the circuit board, the circuit board includes top plate, heat conduction insulating layer, the plywood down that sets gradually from the top down, both ends are equipped with first outer layer circuit, first inner layer circuit respectively about the top plate, both ends are equipped with second inner layer circuit, second outer layer circuit respectively about the plywood down, be equipped with a chip groove on the top plate, be equipped with the chip on the chip groove, the pin of chip with first outer layer circuit electric connection, still be equipped with two recesses on the top plate, two the recess is located respectively chip groove both sides, first outer layer circuit, chip, recess surface cover have the first waterproof lacquer of one deck, cellular water absorption piece has been placed in the recess, the recess bottom is connected with the wash port that runs through heat conduction insulating layer, lower floor's board.

Specifically, the honeycomb-shaped water absorption block is sponge.

Specifically, the lower end of the chip groove is connected with a heat dissipation hole, the bottom of the heat dissipation hole is connected with an exhaust hole, and the exhaust hole is communicated with the drain hole.

Specifically, the lower end face of the second outer layer circuit is covered with a layer of second waterproof paint.

Specifically, a gold dissolving hole is further formed in the circuit board.

The utility model has the advantages that:

the utility model discloses a circuit board has increased the one deck waterproof paint on the chip surface, and has increased two recesses in the chip both sides, has placed the sponge in the recess, and when the chip of a small amount of water drippage was last, water can flow into to the recess in, utilizes the stronger water absorption capacity absorbed water of sponge, has avoided a small amount of water deposit to cause the circuit short circuit on the circuit board, has splendid waterproof performance.

Drawings

Fig. 1 is a schematic structural diagram of a waterproof circuit board for a set-top box of the present invention.

The reference signs are: the solar cell comprises an upper plate 1, a first outer layer circuit 11, a first inner layer circuit 12, a chip groove 13, a groove 14, a heat conduction insulating layer 2, a drain hole 21, a heat dissipation hole 22, a vent hole 23, a lower plate 3, a second inner layer circuit 31, a second outer layer circuit 32, a chip 4, first waterproof paint 5, a honeycomb-shaped water absorption block 6, second waterproof paint 7 and a gold melting hole 8.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

As shown in fig. 1:

the utility model provides a waterproof type circuit board for STB, includes the circuit board, the circuit board includes top plate 1, heat conduction insulating layer 2, lower floor's board 3 that from the top down set gradually, both ends are equipped with first outer layer circuit 11, first inlayer circuit 12 respectively about top plate 1, both ends are equipped with second inlayer circuit 31, second inlayer circuit 32 respectively about lower floor's board 3, be equipped with a chip groove 13 on top plate 1, be equipped with chip 4 on the chip groove 13, the pin of chip 4 with first outer layer circuit 11 electric connection, still be equipped with two recesses 14 on top plate 1, two recesses 14 are located respectively chip groove 13 both sides, first outer layer circuit 11, chip 4, recess 14 surface covering have the first waterproof lacquer 5 of one deck, cellular water absorption piece 6 has been placed in recess 14, recess 14 bottom is connected with and runs through heat conduction insulating layer 2 both sides, When a small amount of water drops on the chip 4, the water in the water drain hole 21 of the lower plate 3 can flow into the groove 14, and the honeycomb water absorption block 6 absorbs the water by utilizing the strong water absorption capacity, so that the circuit short circuit caused by the deposition of the small amount of water on the circuit board is avoided, and the waterproof performance is excellent.

Preferably, the honeycomb-shaped water absorption block 6 is a sponge, the sponge has strong water absorption, and the material cost is low.

Preferably, simultaneously, in order to improve the heat dissipation efficiency of the chip 4, the lower end of the chip slot 13 is connected with a heat dissipation hole 22, the bottom of the heat dissipation hole 22 is connected with an exhaust hole 23, the exhaust hole 23 is connected with the drain hole 21 in a penetrating manner, and part of heat emitted by the chip 4 can be emitted to the outside through the heat dissipation hole 22, the exhaust hole 23 and the drain hole 21.

Preferably, in order to improve the waterproof performance of the lower end face of the circuit board, the lower end face of the second outer layer circuit 32 is covered with a layer of second waterproof paint 7.

Preferably, a gold plating hole 8 is further formed in the circuit board, and a copper foil covers the inner wall of the gold plating hole 8 and is used for electrically connecting the upper board 1 and the lower board 3.

The above embodiments only represent one embodiment of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a waterproof type circuit board for STB, includes the circuit board, its characterized in that, the circuit board includes from the top down upper plate (1), heat-conducting insulation layer (2), lower floor plate (3) that set gradually, both ends are equipped with first outer layer circuit (11), first inner layer circuit (12) respectively about upper plate (1), both ends are equipped with second inner layer circuit (31), second outer layer circuit (32) respectively about lower floor plate (3), be equipped with one chip groove (13) on upper plate (1), be equipped with chip (4) on chip groove (13), the pin of chip (4) with first outer layer circuit (11) electric connection, still be equipped with two recess (14) on upper plate (1), two recess (14) are located respectively chip groove (13) both sides, first outer layer circuit (11), The surface of the chip (4) and the surface of the groove (14) are covered with a layer of first waterproof paint (5), a honeycomb-shaped water absorption block (6) is placed in the groove (14), and a water drainage hole (21) penetrating through the heat conduction insulating layer (2) and the lower layer plate (3) is connected to the bottom of the groove (14).

2. A waterproof type circuit board for set-top boxes according to claim 1, characterized in that said cellular water absorption block (6) is a sponge.

3. The waterproof circuit board for the set top box according to claim 1, wherein a heat dissipation hole (22) is connected to the lower end of the chip groove (13), an exhaust hole (23) is connected to the bottom of the heat dissipation hole (22), and the exhaust hole (23) is connected with the drain hole (21) in a penetrating manner.

4. A water-proof type circuit board for set-top boxes according to claim 1, characterized in that the lower end face of said second outer layer of wires (32) is covered with a layer of second water-proof paint (7).

5. A waterproof type circuit board for set-top box according to claim 1, characterized in that, the circuit board is also provided with a gold hole (8).