CN211352584U

CN211352584U - Circuit board capable of preventing circuit from being scratched

Info

Publication number: CN211352584U
Application number: CN201921397994.XU
Authority: CN
Inventors: 刘小初
Original assignee: Guangzhou Changshi Electronic Technology Co ltd
Current assignee: Guangzhou Changshi Electronic Technology Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-08-25
Anticipated expiration: 2029-08-27

Abstract

The utility model discloses a prevent circuit board of circuit by scratch, it includes an at least insulating layer, the back of the body both sides of the body of insulating layer are provided with first circuit layer and second circuit layer respectively, first circuit layer is including a plurality of pads, first circuit layer reaches second circuit layer coats and is stamped the solder mask layer prevent that the solder mask layer part covers the pad makes the pad conduct the terminal of first circuit layer external connection, the circuit board is close to and has seted up the screw hole in border department, first circuit plywood is located regional wireless circuit distributes between circuit board border and the screw hole. The DVI terminal passes through the screw fixation on the screw hole, near screw hole no circuit, then can not lead to the circuit short circuit because of scratch build-up welding layer on the line when installing the DVI terminal.

Description

Circuit board capable of preventing circuit from being scratched

Technical Field

The utility model relates to a circuit board field, more specifically say, relate to a prevent circuit board that circuit was scratched.

Background

In the computer mainframe equipment, the DVI interface is indispensable part, at present, on the circuit board of connecting the DVI terminal, the DVI terminal passes through the border department of screw lock at the circuit board, when external DVI interface, also need the screw lock in the shell screw hole on the DVI terminal, such design is usually because of DVI terminal iron-clad at the in-process of screw lock, because of the DVI terminal easily produces the contact with the circuit board and fish tail 5V circuit green oil under the DVI seat, as shown in figure 1, thereby make the circuit expose, cause the circuit short circuit during the use, especially when producing the burr on DVI terminal iron-clad, this phenomenon is more obvious, cause the problem that can't use after many DVI wiring, even under the condition of no burr, the installation also needs very carefully, can not scrape the circuit board, otherwise can produce many defective products.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

In order to solve the problem that green oil on the line is easily scratched by the DVI terminal iron shell, the line near the DVI terminal iron shell is redesigned, and the partial line is designed on the other side of the circuit board, so that the line cannot be exposed even if the DVI terminal iron shell scratches the green oil, and the problem that the line is exposed and short-circuited is solved.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a prevent circuit board of circuit by scratch, its includes an at least insulating layer, the back of the body both sides of carrying on the back of insulating layer are provided with first circuit layer and second circuit layer respectively, first circuit layer is including a plurality of pads, first circuit layer reaches it has the solder mask layer to cover on the second circuit layer the solder mask layer part covers the pad makes the pad conduct the terminal of first circuit layer external connection, the circuit board is close to and has seted up the screw hole on the border department, first circuit plywood is located regional wireless circuit distribution between circuit board border and the screw hole.

Furthermore, the second circuit layer is located a circuit is arranged in the area between the edge of the circuit board and the screw hole.

Further, the first circuit layer and the second circuit layer are both copper-plated circuits.

Further, the first circuit layer and the second circuit layer are connected through a through hole.

Furthermore, copper is plated or filled in the through hole, so that the first circuit layer and the second circuit layer are electrically conducted.

Furthermore, the insulating layer is made of polyimide or epoxy resin.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

1. the circuit board edge that contacts with DVI terminal iron-clad distributes without the circuit, even the green oil solder mask of iron-clad scratch also can not lead to the circuit to expose and lead to the problem of circuit short circuit.

2. The 5V circuit originally designed on one side connected with the DVI terminal is changed to the other side of the circuit board, the circuit change is less, the problem of short circuit can be solved without changing the PCB material and the process greatly, the circuit arrangement on the circuit board is very tight originally, under the condition of not changing the distribution of other circuits, one circuit is changed from one side of the circuit board to the other side through the through hole, and the process is simple.

Drawings

FIG. 1 is a prior art design defect map;

FIG. 2 is a schematic diagram of a first circuit layer of the present invention;

FIG. 3 is a schematic diagram of a second circuit layer of the present invention;

FIG. 4 is a schematic diagram of the structure of each layer of the circuit board.

The reference numbers in the figures illustrate:

the printed circuit board comprises a circuit board 10, a first circuit layer 11, a second circuit layer 12, a 5V power circuit 121, an insulating layer 13, a solder mask layer 14, a pad 15, a through hole 16, a screw hole 2, a DVI terminal housing 3 and a housing screw hole 31.

Detailed Description

The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the present invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all belong to the protection scope of the utility model.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 2-4, wherein fig. 2 and 3 are schematic circuit diagrams, which only show a part of circuit structures, and the shapes of the circuit structures do not represent the shapes of actual circuit diagrams, the present invention is based on a circuit board 10 corresponding to a DVI video interface terminal, the circuit board 10 includes a first circuit layer 11 and a second circuit layer 12, which are respectively disposed on two opposite sides of an insulating layer 13, the insulating layer is made of epoxy resin and needs higher strength, the first circuit layer 11 and the second circuit layer 12 are both copper-plated circuits, in other embodiments, the circuit layers can be printed circuits, the first circuit layer 11 and the second circuit layer 12 are both covered with solder mask layers 14, the solder mask layers 14 are formed by printing insulating green oil to protect the circuits, the first circuit layer 11 is connected with a plurality of pads 15, the surfaces of the pads 15 are not covered with the solder mask layers 14, the first circuit layer 11 and the second circuit layer 12 are electrically connected through a through via through hole 16, in this embodiment, the circuit board is a double-layer circuit board, and in other embodiments, the circuit board may also be a multilayer circuit board designed according to actual requirements.

Circuit board 10 is close to border department and runs through and is provided with two screw holes 2 for fixed DVI terminal shell 3, screw hole 2 is close to pad 15, installation DVI terminal shell 3 back, and pad 15 is located DVI terminal shell 3 under, with DVI terminal shell 3 electric connection, thereby makes first circuit layer 11 and second circuit layer 12 and DVI terminal shell electric connection.

Second line layer 12 has a circuit in the regional distribution between screw hole 2 and circuit board border, this circuit is 5V power supply line 121, it passes through-hole 16 and 11 electric connection of first line layer, thereby with DVI terminal shell electric connection, 5V power supply line 121 avoids the region with 3 direct contact of DVI terminal shell, avoid leading to the line layer to expose because of the 3 scratch tourism of installation DVI terminal shell, and simultaneously, on first line layer 11, all not design the circuit in the region adjacent with screw hole 2, therefore can not make the anti-welding layer 14 on the iron-clad scratch circuit of DVI terminal shell 3 because of the impact force of installation screw.

The above; the present invention is not limited to the above embodiments, and any person skilled in the art can substitute or change the technical solution and the modified concept of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a prevent circuit board of circuit by scratch, its characterized in that, it includes an at least insulating layer, the back of the body both sides of insulating layer are provided with first circuit layer and second circuit layer respectively, first circuit layer is including a plurality of pads, first circuit layer reaches second circuit layer coats and is stamped the solder mask layer prevent that the solder mask layer part covers the pad makes the pad conduct the terminal of first circuit layer external connection, the circuit board is close to and has seted up the screw hole on the border department, first circuit plywood is located regional wireless circuit distribution between circuit board border and the screw hole.

2. The circuit board of claim 1, wherein a circuit is disposed on the second circuit layer in a region between the edge of the circuit board and the screw hole.

3. The circuit board of claim 1, wherein the first circuit layer and the second circuit layer are both copper-plated circuits.

4. The circuit board of claim 1, wherein the first circuit layer and the second circuit layer are connected by a via.

5. The circuit board according to claim 4, wherein the through hole is plated with copper or filled with copper paste to electrically connect the first circuit layer and the second circuit layer.

6. The circuit board for preventing the wires from being scratched according to claim 1, wherein said bonding pads are adjacent to said screw holes.

7. The circuit board of claim 1, wherein the insulating layer is made of polyimide or epoxy resin.