CN208190993U - Flexible circuit board - Google Patents

Abstract

The utility model provides a kind of flexible circuit board.The flexible circuit board includes two spaced welding disks, the interconnecting piece for connecting two welding disks, from the interconnecting piece to the extension extended far from the welding disk direction, the flexible circuit board further includes glue-line and the release layer for fitting in the flexible circuit plate surface, the release layer includes the fixed part being fixedly connected by the glue-line with the interconnecting piece and from the fixed part to the movable part extended far from the fixed part direction, and the setting direction of the movable part is identical as the direction that the extension is arranged.In flexible circuit board provided by the utility model, the movable part is identical as the setting direction of the extension, when removing the release layer, the flexible circuit board is identical as the direction of the extension in the component of X-direction, what it is to flexible circuit board formation is drawing force, does not easily cause the fracture of the flexible circuit board.

Description

flexible circuit board

【Technical field】

The utility model relates to the field of circuit boards, in particular to a flexible circuit board.

【Background technique】

With the advent of the digital age, human beings are increasingly dependent on electronic products. In order to respond to the high-speed, high-efficiency, thin, and short requirements of today's electronic products, flexible circuit boards with flexural characteristics have been widely used in various electronic devices, such as: various types of monitors, notebook computers, mobile phones, digital cameras, Personal digital assistants (PDAs), printers, and CD-ROM drives.

However, in the related art, the flexible circuit board includes a pad portion, a connection portion, an extension portion, an external conductive pad, and a release layer, and the release layer includes a fixing portion attached to the connection portion and a fixing portion from the fixing portion. The movable part extends away from the fixed part, and the movable part is arranged in the same direction as the connecting part. When using a flexible circuit board with this structure, when the release layer is peeled off from the flexible circuit board, the component force of the flexible circuit board in the horizontal direction is perpendicular to the extension, forming a Shearing force can easily cause the fracture of the flexible circuit board.

Therefore, it is necessary to provide a new flexible circuit board to solve the above technical problems.

【Content of invention】

The purpose of the utility model is to provide a flexible circuit board with stable structure.

In order to achieve the above purpose, the utility model provides a flexible circuit board, which includes two pads arranged at intervals, a connecting portion connecting the two pads, and a connecting portion extending from the connecting portion to a direction away from the pads. An extension part and an external conductive pad fixedly connected to an end of the extension part away from the connection part, the flexible circuit board also includes an adhesive layer and a release layer attached to the surface of the flexible circuit board, the release layer The type layer includes a fixed part fixedly connected to the connecting part through the adhesive layer and a movable part extending from the fixed part to a direction away from the fixed part. same direction.

Preferably, the movable part is spaced apart from the extension part.

Preferably, the glue layer completely covers the connection part, and the shape of the fixing part matches the shape of the connection part.

Preferably, the extension part includes a body part fixedly connected to the external conductive pad and a bent part obliquely extending from the body part to the fixed part, and the bent part is fixedly connected to the connecting part .

Preferably, the two pad parts, the connection part, the extension part and the external conductive pad are integrally formed.

Preferably, the pad portion is rectangular.

Preferably, the release layer is a film release layer, a glassine release layer or a clay-coated cowhide release layer.

Compared with the related technology, in the flexible circuit board provided by the utility model, the installation direction of the movable part and the extension part is the same, and when the release layer is peeled off, the component force of the flexible circuit board in the X direction In the same direction as the extending portion, a tensile force is formed on the flexible circuit board, which is not easy to cause breakage of the flexible circuit board.

【Description of drawings】

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is the schematic diagram of the three-dimensional structure of the flexible circuit board provided by the utility model;

FIG. 2 is a schematic diagram of an exploded structure of the flexible circuit board shown in FIG. 1;

Fig. 3 is a sectional view of the flexible circuit board shown in Fig. 1 along line A-A;

Fig. 4 is a schematic diagram of the force direction of the flexible circuit board provided by the present invention when the release layer is peeled off.

【Detailed ways】

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that, the X-axis direction and the Z-axis direction described in the present invention are the directions shown by the X-axis and Z-axis in FIG. 1 .

Please refer to Fig. 1 to Fig. 3 at the same time, the utility model provides a kind of flexible circuit board 100, and it comprises two pad parts 1 that are arranged at intervals, the connection part 2 that connects two described pad parts 1, from the described connection part 2 The extension part 3 extending away from the pad part 1, the external conductive pad 4 fixedly connected to the end of the extension part 3 away from the connecting part 2, and the isolation pad attached to the surface of the flexible circuit board 100 The type layer 5 and the adhesive layer sandwiched between the flexible circuit board 100 and the release layer 5 . The two pad parts 1 , the connecting part 2 , the extension part 3 and the external conductive pad 4 are integrally formed.

The number of the pads 1 is two, and the two pads 1 are arranged at intervals relative to each other. The pad portion 1 is rectangular and used for fixed connection with other components.

The connection part 2 is used to connect the two pad parts 1 , and the connection part 2 and the pad part 1 are integrally formed.

The extension part 3 is fixedly connected to the side of the connection part 2 away from the welding part 1. Specifically, the extension part 3 is arranged in the middle of the connection part 2 and forms a T with the connection part 2. type structure. The extension portion 3 includes a body portion 31 fixedly connected to the external conductive pad 4 and a bent portion 32 extending obliquely from the body portion 31 to a direction away from the body portion 31, and the bent portion 32 is connected to the body portion 31. The connection part 2 is fixedly connected.

Further, the body part 31 and the bending part 32 are integrally formed. The arrangement of the bending portion 32 avoids the stress concentration of the flexible circuit board 100 at the junction of the connecting portion 2 and the extension portion 3, improves the reliability of the flexible circuit board 100, and can extend The service life of the flexible circuit board 100 .

An external conductive pad 4 is fixedly connected to an end of the extension part 3 away from the connecting part 2 , and the external conductive pad 4 is used for electrical connection with the outside.

The release layer 5 is attached to the surface of the flexible circuit board 100 , specifically, the release layer 5 is attached to the surface of the connecting portion 2 for protecting the adhesive layer.

The release layer 5 includes a fixed portion 51 fixedly connected with the connecting portion 2 and a movable portion 52 extending from the fixed portion 51 away from the fixed portion 51 . The release layer 5 is a film release layer, a glassine release layer or a clay-coated cowhide release layer.

The shape of the fixing portion 51 matches the shape of the connecting portion 2, that is, the fixing portion 51 completely covers the connecting portion 2. The installation direction of the movable part 52 is the same as the direction in which the extension part 3 is arranged. Specifically, the movable part 52 is arranged parallel to the main body part 31, that is, the movable part 52 and the fixed part 51 also form a T structure. The movable part 52 is spaced apart from the extension part 3, so as to facilitate clamping of the movable part 52 during peeling.

The adhesive layer is sandwiched between the connecting portion 2 and the release layer 5 for fixed connection between the flexible circuit board 100 and other components, and the adhesive layer completely covers the connecting portion 2 .

Please refer to Fig. 4, when the movable part 52 is subjected to a peeling force of F at point A, the peeling force is transmitted to point B, that is, B is also subjected to a peeling force of F, and the peeling force F can be decomposed It is the component force Fa along the X-axis direction and the component force Fb along the Z-axis direction. It can be understood that the direction of the component force Fa is the same as the installation direction of the body part 31, and the connecting part 2 is moved away from The direction of the extension part 3 is stretched. At this time, the bending part 32 is stretched and elongated by the stretching force, which is used to offset the stretch caused by the component force Fa, and can avoid the body Part 31 is broken due to excessive stretching, which has good reliability. The component force Fb is used to stretch the fixing part 51 along the positive direction of the Z axis, that is, the component force Fb is used to separate the fixing part 51 from the connecting part 2, thereby separating the release layer 5 is peeled off from the surface of the flexible circuit board 100.

Compared with the related art, in the flexible circuit board 100 provided by the present invention, the movable part 52 is arranged in the same direction as the extension part 3, and when the release layer 5 is peeled off, the flexible circuit board 100 is The component force in the X direction is the same as the direction of the extension part 3 , and what is formed on the flexible circuit board 100 is a tensile force, which is not easy to cause the fracture of the flexible circuit board 100 .

What has been described above is only the embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims (7)

1. a kind of flexible circuit board, including two spaced welding disks, the interconnecting piece that connects two welding disks, from the company Socket part is fixed to the extension extended far from the welding disk direction and with the extension far from one end of the interconnecting piece The external conduct pad of connection, which is characterized in that the flexible circuit board further includes glue-line and fits in the flexible circuit board The release layer on surface, the release layer include the fixed part being fixedly connected by the glue-line with the interconnecting piece and from described solid Portion is determined to the movable part extended far from the fixed part direction, the side of the setting direction of the movable part and extension setting To identical.

2. flexible circuit board according to claim 1, which is characterized in that the movable part is set with the extension interval It sets.

3. flexible circuit board according to claim 1, which is characterized in that the interconnecting piece, institute is completely covered in the glue-line The shape of the shape and the interconnecting piece of stating fixed part matches.

4. flexible circuit board according to claim 1, which is characterized in that the extension includes welding with the external conductive Body part that disk is fixedly connected and the bending part that inclination extends from the body part to the fixed part, the bending part with it is described Interconnecting piece is fixedly connected.

5. flexible circuit board according to claim 1, which is characterized in that two welding disks, the interconnecting piece, described Extension and the external conduct pad are integrally formed setting.

6. flexible circuit board according to claim 1, which is characterized in that the welding disk is rectangular-shaped.

7. flexible circuit board according to claim 1, which is characterized in that the release layer is lamination release layer, Ge Laxin Release layer or clay coated ox-hide release layer.