CN201383899Y - Circuit board and machine body applying same - Google Patents

Abstract

A circuit board and a machine body using the same are provided, wherein the circuit board comprises a main body and a plurality of strip-shaped conductive structures. The main body has a through hole and a ground plane. The through hole penetrates through the main body. The ground plane surrounds the through hole. The strip-shaped conductive structure is arranged on the ground plane. The length of each strip-shaped conductive structure is greater than the distance from the hole edge of the through hole to the outer edge of the ground plane. A grounding path is formed by the through hole and the strip-shaped conductive structure. The organism includes a mounting, a circuit board, a conductive housing and a conductive locking piece, the utility model discloses utilize this ground connection route to come circuit board ground connection in conductive housing with above-mentioned circuit board through conductive locking piece to reduce the electromagnetic interference between the electronic component on the circuit board. In addition, since the thickness of the strip-shaped conductive structures is substantially the same, the conductive components arranged on the strip-shaped conductive structures can be flatly attached and in surface contact with the strip-shaped conductive structures, so that the grounding area is increased.

Description

Circuit board and its body

technical field

The utility model relates to a circuit board and a body using the same, in particular to a circuit board with a grounding path and a body using the same.

Background technique

With the application and development of electronic products, the use of circuit boards is quite extensive. In general, electronic components such as resistors, capacitors or chips can be assembled on a circuit board for integration. However, the electronic components may interfere with each other electromagnetically, so that the functions of the electronic components are affected and the working efficiency is reduced. Therefore, a ground path is usually provided on the circuit board to reduce interference between electronic components.

Traditionally, the circuit board has a screw hole and a ground surface. The ground surface surrounds the screw hole, and a tin layer is soldered on the ground surface. When the circuit board and the conductive shell are to be fixed to each other by metal screws, the nuts of the metal screws contact the tin layer to electrically couple with the ground surface, and the studs of the metal screws pass through the screw holes to be locked on the conductive shell. In this way, a ground path is formed between the circuit board and the conductive casing.

However, soldering the entire surface of the tin layer on the grounding surface tends to have an uneven surface, so that the nuts of the metal screws often only touch the tin layer at points, thereby reducing the grounding area. Furthermore, although it is traditionally proposed to weld a linear radial tin layer on the ground surface to avoid the uneven surface of the tin layer, the area of the linear radial tin layer is small, so that the nut of the metal screw is in contact with the tin layer. The grounding area between layers is correspondingly reduced. Therefore, how to design a circuit board that can be effectively grounded is one of the subjects that the relevant industry is striving for.

Utility model content

The technical problem to be solved by the utility model is to provide a circuit board and a body using it, which uses a strip-shaped conductive structure as a grounding medium, so as to have the advantages of smooth surface and increased grounding area.

In order to achieve the above object, the utility model proposes a circuit board, which is characterized in that it includes:

a body having a through hole extending through the body and a ground plane surrounding the through hole; and

A plurality of strip-shaped conductive structures are arranged on the ground plane, and the length of each strip-shaped conductive structure is greater than the distance from the edge of the through hole to the outer edge of the ground plane.

In the above-mentioned circuit board, the strip-shaped conductive structures are arc-shaped.

In the above-mentioned circuit board, two ends of each strip-shaped conductive structure are respectively located at the edge of the through hole and the outer edge of the ground plane.

The above-mentioned circuit board, wherein the main body includes:

a substrate;

a conductive layer disposed on the substrate; and

An insulating layer is arranged on the conductive layer and has a hole. The conductive layer exposed through the hole is the ground plane. The through hole is positioned corresponding to the hole to penetrate the substrate and the conductive layer.

The above-mentioned circuit board, wherein the main body also includes:

A protection layer is disposed on the ground plane, and the strip-shaped conductive structures are disposed on the ground plane through the protection layer and are electrically coupled to the protection layer.

In order to achieve the above purpose, the utility model also proposes a body, which is characterized in that it includes:

a fixing piece;

A circuit board is arranged on the fixture, and the circuit board includes:

a main body having a first through hole and a ground plane, the first through hole passing through the main body, the ground plane surrounding the first through hole; and

A plurality of strip-shaped conductive structures are arranged on the ground plane, and the length of each strip-shaped conductive structure is greater than the distance from the edge of the first through hole to the outer edge of the ground plane;

A conductive shell has a second through hole and a set of surfaces, the second through hole runs through the conductive shell, the set surface surrounds the second through hole, the conductive shell is arranged on the circuit board, making the assembly surface contact the strip-shaped conductive structures, and the position of the second through hole corresponds to the position of the first through hole; and

A conductive locking part is locked on the fixing part through the second through hole and the first through hole, so that the circuit board is fixed between the conductive casing and the fixing part.

In the above-mentioned body, the strip-shaped conductive structures are arc-shaped.

In the above-mentioned body, two ends of each strip-shaped conductive structure are respectively located at the edge of the first through hole and the outer edge of the grounding plane.

The above-mentioned body, wherein the main body includes:

a substrate;

a conductive layer disposed on the substrate; and

An insulating layer is arranged on the conductive layer and has a hole, the conductive layer exposed through the hole is the ground plane, the position of the first through hole corresponds to the position of the hole, so as to penetrate the substrate and the conductive layer layer.

The above-mentioned body, wherein the main body also includes:

A protection layer is disposed on the ground plane, and the strip-shaped conductive structures are disposed on the ground plane through the protection layer and are electrically coupled to the protection layer.

The beneficial effect of the utility model is that, the circuit board disclosed in the utility model and the machine body using it form a grounding path by the through hole and the strip-shaped conductive structure. The conductive lock utilizes the grounding path to ground the circuit board to the conductive housing, so as to reduce electromagnetic interference between electronic components on the circuit board. In addition, since the thicknesses of the strip-shaped conductive structures are substantially the same, the conductive components disposed on the strip-shaped conductive structures can be flatly attached and surface-contacted with each strip-shaped conductive structure, so as to increase the grounding area.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

Among them, reference signs

1 is a schematic diagram of a circuit board according to a first embodiment of the present invention;

Fig. 2 is the schematic diagram according to another kind of circuit board of the present utility model;

3A is an exploded view of a body applying the circuit board in FIG. 1 according to a second embodiment of the present invention;

FIG. 3B is a cross-sectional view of the body in FIG. 3A when assembled.

Among them, reference signs

100: Body

110: circuit board

111, 111': subject

111a: Substrate

111b: conductive layer

111c: insulating layer

111d: protective layer

112: strip conductive structure

120: Fixing piece

130: Conductive housing

140: Conductive lock

d: Spacing

h1: hole

h21, h22: through hole

r1: hole edge

r2: outer edge

s1: ground plane

s2: Assembly surface

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present utility model are specifically described:

The utility model mainly provides a circuit board and a machine body using the circuit board. The circuit board includes a main body and a plurality of strip-shaped conductive structures. The main body has a through hole and a ground plane. The through hole runs through the main body. A ground plane surrounds the via. The strip conductive structure is arranged on the ground plane. The length of each strip-shaped conductive structure is greater than the distance from the edge of the through hole to the outer edge of the ground plane.

The preferred embodiments are listed below, and the circuit board of the present utility model and the body to which it is applied are described in detail in conjunction with the drawings. However, those skilled in the art should understand that these drawings and words are for illustration purposes only, and will not limit the protection scope of the present invention.

first embodiment

Please refer to FIG. 1 , which is a schematic diagram of a circuit board according to a first embodiment of the present invention. The circuit board 110 includes a main body 111 and a plurality of strip-shaped conductive structures 112 . The main body 111 includes a substrate 111a, a conductive layer 111b and an insulating layer 111c. The conductive layer 111b is disposed on the substrate 111a, and the insulating layer 111c is disposed on the conductive layer 111b.

The insulating layer 111c has a hole h1. The conductive layer 111b exposed through the hole h1 is a ground plane s1 of the main body 111 . The position of a through hole h21 of the main body 111 corresponds to the hole h1 to penetrate through the substrate 111a and the conductive layer 111b. The ground plane s1 surrounds the through hole h21.

The strip conductive structure 112 is made of tin, for example, and is disposed on the ground plane s1 by soldering. The length of each strip-shaped conductive structure 112 is greater than the distance d from the edge r1 of the through hole h1 to the outer edge r2 of the ground plane s1 , and the thickness of these strip-shaped conductive structures 112 is substantially the same. In this embodiment, the characteristic that each strip-shaped conductive structure 112 has a length greater than the distance d can be achieved by, for example, designing the shape. For example, as shown in FIG. 1 , each strip-shaped conductive structure 112 may be arc-shaped, and its two ends are respectively located at the edge r1 of the through hole h1 and the outer edge r2 of the ground plane s1 .

In this way, the circuit board 110 of this embodiment forms a ground path. When the circuit board 110 is disposed in a conductive housing, a conductive component can use the ground path to ground the circuit board 110 to the conductive housing, so as to reduce electromagnetic interference between electronic components on the circuit board 110 . In addition, since the thicknesses of the strip-shaped conductive structures 112 are substantially the same, the conductive components disposed on the strip-shaped conductive structures 112 can be flatly attached and surface-contacted with each strip-shaped conductive structure 112 to increase the grounding area.

In addition, in order to prevent the ground plane s1 from being directly oxidized in contact with the external environment, a conductive protective layer may be provided on the ground plane s1 . Please refer to FIG. 2 , which is a schematic diagram of another circuit board according to the present invention. The main body 111' may further include a protection layer 111d disposed on the ground plane s1. In this way, the strip-shaped conductive structure 112 is disposed on the ground plane s1 through the protective layer 111d, and is electrically coupled to the ground plane s1 to provide a ground path.

second embodiment

In this embodiment, the circuit board 110 disclosed in the first embodiment is applied in the body 100 shown in FIG. 3A and FIG. 3B . The structural features and configuration relationship of the circuit board 110 applied in the body 100 will be mainly described below. The same features as those in the first embodiment will not be described repeatedly. In addition, components that have not been changed or adjusted will use the same reference numerals as those in the first embodiment, and will not be repeated here.

Please refer to FIG. 3A and FIG. 3B at the same time. FIG. 3A is an exploded view of the body applying the circuit board in FIG. 1 according to the second embodiment of the present invention, and FIG. 3B is a cross-sectional view of the body in FIG. 3A when assembled. The body 100 includes the circuit board 110 shown in FIG. 1 , a fixing part 120 , a conductive shell 130 and a conductive locking part 140 .

The circuit board 110 is disposed on the fixing member 120 . The conductive housing 130 has a through hole h22 and a set of surfaces s2. The through hole h22 runs through the conductive housing 130 , and the assembly surface s2 surrounds the through hole h22 . The conductive housing 130 is disposed on the circuit board 110 such that the assembly surface s2 contacts the strip-shaped conductive structure 112 , and the position of the through hole h22 corresponds to the position of the through hole h21 . The conductive locking member 140 is locked on the fixing member 120 through the through hole h22 and the through hole h21 , so that the circuit board 110 is fixed between the conductive housing 130 and the fixing member 140 .

In this way, the circuit board 110 forms a ground path. The conductive locking element 140 utilizes this ground path to ground the circuit board 110 to the conductive housing 130 to reduce electromagnetic interference between electronic components on the circuit board 110 .

In the circuit board disclosed in the above-mentioned embodiments of the present invention and the machine body using it, a grounding path is formed by the through hole and the strip-shaped conductive structure. The conductive lock utilizes the grounding path to ground the circuit board to the conductive housing, so as to reduce electromagnetic interference between electronic components on the circuit board. In addition, since the thicknesses of the strip-shaped conductive structures are substantially the same, the conductive components disposed on the strip-shaped conductive structures can be flatly attached and surface-contacted with each strip-shaped conductive structure, so as to increase the grounding area.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (10)

1. A circuit board, characterized in that, comprising: a body having a through hole extending through the body and a ground plane surrounding the through hole; and A plurality of strip-shaped conductive structures are arranged on the ground plane, and the length of each strip-shaped conductive structure is greater than the distance from the edge of the through hole to the outer edge of the ground plane. 2. The circuit board according to claim 1, wherein the strip-shaped conductive structures are arc-shaped. 3 . The circuit board according to claim 1 , wherein two ends of each strip-shaped conductive structure are respectively located at the edge of the through hole and the outer edge of the ground plane. 4 . 4. The circuit board according to claim 1, wherein the main body comprises: a substrate; a conductive layer disposed on the substrate; and An insulating layer is arranged on the conductive layer and has a hole. The conductive layer exposed through the hole is the ground plane. The through hole is positioned corresponding to the hole to penetrate the substrate and the conductive layer. 5. The circuit board according to claim 4, wherein the main body further comprises: A protection layer is disposed on the ground plane, and the strip-shaped conductive structures are disposed on the ground plane through the protection layer and are electrically coupled to the protection layer. 6. A body, characterized in that it comprises: a fixing piece; A circuit board is arranged on the fixture, and the circuit board includes: a main body having a first through hole and a ground plane, the first through hole passing through the main body, the ground plane surrounding the first through hole; and A plurality of strip-shaped conductive structures are arranged on the ground plane, and the length of each strip-shaped conductive structure is greater than the distance from the edge of the first through hole to the outer edge of the ground plane; A conductive shell has a second through hole and a set of surfaces, the second through hole runs through the conductive shell, the set surface surrounds the second through hole, the conductive shell is arranged on the circuit board, making the assembly surface contact the strip-shaped conductive structures, and the position of the second through hole corresponds to the position of the first through hole; and A conductive locking part is locked on the fixing part through the second through hole and the first through hole, so that the circuit board is fixed between the conductive casing and the fixing part. 7. The body according to claim 6, wherein the strip-shaped conductive structures are arc-shaped. 8 . The body according to claim 6 , wherein two ends of each strip-shaped conductive structure are respectively located at the edge of the first through hole and the outer edge of the ground plane. 9. The body of claim 6, wherein the body comprises: a substrate; a conductive layer disposed on the substrate; and An insulating layer is arranged on the conductive layer and has a hole, the conductive layer exposed through the hole is the ground plane, the position of the first through hole corresponds to the position of the hole, so as to penetrate the substrate and the conductive layer layer. 10. The body according to claim 9, wherein the main body further comprises: A protection layer is disposed on the ground plane, and the strip-shaped conductive structures are disposed on the ground plane through the protection layer and are electrically coupled to the protection layer.

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