CN105611715B - Flexible PCB and mobile terminal - Google Patents

Abstract

The invention discloses a flexible circuit board and a mobile terminal. The flexible circuit board includes a main body and a connector. One end of the main body is provided with a connecting part and a bending part. The bending part, the connecting part and the main body are integrally formed; Between the other end of the bending part and the main body; the front of the connector is used to connect with the connection seat, and the back of the connector is fixedly connected with the connection part. The mobile terminal has the aforementioned flexible circuit board. The bending part is welded with the connecting head, and the main body and the connecting part are located at the back of the connecting head, and the connecting part is fixedly connected with the back of the connecting head. Bending, without affecting the welded part of the bending part and the connecting head, so that it is not easy to break, so as to ensure the reliability of the connection.

Description

Flexible circuit board and mobile terminal

technical field

The invention relates to the field of flexible circuit boards, in particular to a flexible circuit board and a mobile terminal.

Background technique

Flexible printed circuit (FPC, Flexible Printed Circuit) is a commonly used electrical connection device in various mobile terminals, one end of which is welded to a connector, and the connector can be plugged into the connector on the main board to achieve electrical connection. In the prior art, during the assembly or maintenance process of the flexible circuit board, the main body and the connector will be bent. After several times of bending, the welding part between the main body and the connector is easy to loosen, causing the lead wire to break, thereby affecting the connection. reliability.

Contents of the invention

The purpose of the present invention is to provide a flexible circuit board and a mobile terminal, the main body of the flexible circuit board and the connector are not easily broken, and the connection reliability is ensured.

In order to solve the above technical problems, on the one hand, the present invention provides a flexible circuit board, including a main body and a connector, one end of the main body is provided with a connecting part and a bent part, and the bent part, the connecting part and the The main body is integrally formed; the bending part is U-shaped, and one end thereof is welded to the connecting head; the connecting part is connected between the other end of the bending part and the main body; the connecting head The front side of the connector is used to connect with the connection seat, and the back side of the connector is fixedly connected with the connection part.

Wherein, the flexible circuit board further includes a reinforcing steel plate; the reinforcing steel plate is fixed between the back of the connecting head and the connecting part.

Wherein, both ends of the reinforcing steel plate are bent to form hooks, and the two side edges of the connecting portion are respectively snapped into the two hooks.

Wherein, the flexible circuit board further includes a reinforcing steel plate; the connection part is fixed between the reinforcing steel plate and the back of the connector.

Wherein, a connecting post is provided on the back of the connecting head, a through hole is provided on the connecting part, the connecting post penetrates the through hole, and the end of the connecting post far away from the connecting head is thermally fused to form a limited The position part, the connection part is limited between the connection head and the limit part.

Wherein, the flexible circuit board further includes a buffer sleeve, the buffer sleeve is sleeved at the joint between the connecting portion and the main body, and the buffer sleeve is fixedly connected with the connector; the buffer sleeve has a hardness less than the specified The main body is made of flexible material.

Wherein, two connecting ears are provided on the outer side of the connecting sleeve, and the two connecting ears are respectively fixedly connected to the two ends of the connecting head.

Wherein, the connecting ear is ring-shaped, and the two connecting ears are sleeved on opposite ends of the connecting head respectively.

Wherein, the connection part is glued on the back side of the connection.

In another aspect, the present invention provides a mobile terminal, the mobile terminal has the aforementioned flexible circuit board.

In the flexible circuit board and the mobile terminal provided by the present invention, the bending part is welded to the connecting head, and the main body and the connecting part are located at the back of the connecting head, the connecting part is fixedly connected to the back of the connecting head, and the main body is bent relative to the connecting head. When bending occurs at the joint between the connecting part and the main body, it will not affect the welding position between the bent part and the connecting head, so that it is not easy to break, thereby ensuring the reliability of the connection.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is a schematic side view of the flexible circuit board provided by the first embodiment of the present invention;

Fig. 2 is a three-dimensional schematic diagram of the flexible circuit board in Fig. 1;

Fig. 3 is a schematic diagram of the three-dimensional structure of the flexible circuit board provided by the second embodiment of the present invention;

Fig. 4 is a schematic perspective view of the three-dimensional structure of the flexible circuit board provided by the third embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

An embodiment of the present invention provides a mobile terminal, which can be any terminal device, such as a tablet computer, a mobile phone, an e-reader, a remote controller, a personal computer (Personal Computer, PC), a notebook computer, a vehicle-mounted device, a network TVs, wearables, etc. The mobile terminal includes a main board and electronic components, and the electronic components may be cameras, keys and the like. The electronic components are connected with the main board through the flexible circuit board.

Referring to Fig. 1 and Fig. 2, the flexible circuit board 100 provided by the first embodiment of the present invention includes a main body 11 and a connector 12 arranged at one end of the main body 11, and one end of the main body 11 is provided with a connecting part 111 and a bending part 112; the main body 11, the connecting part 111 and the bending part 112 are integrally formed to improve the strength of the connecting structure among the three. The bending part 112 is U-shaped, one end of which is welded to the connector 12, and the connecting part 111 is connected between the other end of the bending part 112 and the main body 11; The back is fixedly connected with the connecting portion 111 . The bending part 112 is welded to the connecting head 12, and the main body 11 and the connecting part 111 are located at the back of the connecting head 12, and the connecting part 111 is fixedly connected to the back of the connecting head 12. When the main body 11 is bent relative to the connecting head 12, The connection between the connecting portion 111 and the main body 11 is bent without affecting the welding between the bent portion 112 and the connecting head 12 , so as to ensure the reliability of the connection between the main body 11 and the connecting head 12 .

Further, the flexible circuit board 100 further includes a reinforcing steel plate 13 , and the reinforcing steel plate 13 is fixed between the back surface of the connecting head 12 and the connecting portion 111 . Since the bent portion 112 is welded to the back of the connector 12 , the strength of the welded portion between the bent portion 112 and the connector 12 can be improved by using the reinforcing steel sheet, and the structural strength of the connector 12 can also be improved. During the manufacturing process, the bending part 112 is first welded to the connecting head 12, then the reinforcing steel plate 13 is fixed to the back of the connecting head 12, and finally the connecting part 111 is bonded and fixed on the reinforcing steel plate with double-sided tape or glue 13 on.

Here, in other embodiments, the connecting portion 111 may be fixed between the reinforcing steel plate 13 and the back surface of the connecting head 12 . Firstly, the connection part 111 is fixedly connected to the back of the connection head 12 , and then the reinforcing steel plate 13 is fixed on the connection part 111 . Or, in yet another embodiment, the reinforcing steel plate 13 may not be provided, and the connecting portion 111 may be directly fixedly connected to the back of the connector 12 by means of bonding or the like. Further, the back of the connector 12 may be provided with a connection The connecting part 111 is provided with a through hole, the connecting post is pierced with a through hole, the end of the connecting post far away from the connecting head 12 is thermally fused to form a limiting part, and the connecting part 111 is limited between the connecting head 12 and the limiting part, The limiting part of the connecting column realizes the fixed connection between the connecting part 111 and the connecting head 12, so that the connection between the two is firm and reliable. After the connecting column is passed through the via hole and the through hole, the limiting part is formed by thermal fusion.

As shown in FIG. 3, the flexible circuit board 200 provided by the second embodiment of the present invention includes a main body 21 and a connector 22. One end of the main body 21 is provided with a connecting part 211 and a bending part 212. The main body 21, The structures of the connecting portion 211 , the bending portion 212 and the connecting head 22 are substantially the same as those of the first embodiment, and will not be repeated here.

In this embodiment, the flexible circuit board 200 further includes a buffer sleeve 23, the buffer sleeve 23 is sleeved at the joint between the connecting portion 211 and the main body 21, and the buffer sleeve 23 is fixedly connected to the connector 22, so that the connecting portion 211 can pass through the buffer sleeve 23 is connected to the back of connector 22. The buffer sleeve 23 can be made of flexible material such as silicone or rubber, which is less rigid than the main body 21 . The buffer sleeve 23 is located at the joint between the main body 21 and the connecting part 211, and can form a buffer for the joint between the main body 21 and the connecting part 211, so that the joint between the main body 21 and the connecting part 211 is repeatedly bent and damaged, such as breakage, to ensure the connection Not easy to break.

Two connecting ears 231 are provided on the outer side of the buffer sleeve 23 , and the two connecting ears 231 are respectively fixedly connected to two ends of the connecting head 22 . Using the two connecting ears 231 can facilitate the fixed connection between the buffer sleeve 23 and the connecting head 22 . Furthermore, the connecting ears 231 are ring-shaped, and the two connecting ears 231 are sleeved on opposite ends of the connecting head 22 respectively, so that the buffer sleeve 23 and the connecting head 22 can be fixedly connected conveniently. Glue can be filled between the buffer sleeve 23 and the main body 21 and the connecting portion 211 to improve the connection strength.

Here, in other embodiments, the connecting ear 231 can also be directly fixed on the connecting head 22 by means of screws or bonding, or a connecting post is provided on the connecting head 22, and the connecting post passes through the connecting ear 231, and the connecting post The end part of the heat-fused to form a limiting part, so that the connecting ear 231 and the connecting head 22 are fixedly connected. Alternatively, the connection ear 231 is not provided, and the buffer sleeve 23 is fixedly connected to the connection head 22 directly.

As shown in Figure 4, in the flexible circuit board 300 provided by the third embodiment of the present invention, the flexible circuit board 300 includes a main body 31, a connector 32 and a reinforcing steel plate 33, and one end of the main body 31 is provided with a connecting part 311 and a bending The structures of the part 312 , the main body 31 , the connecting part 311 , the bending part 312 and the connecting head 32 are substantially the same as those of the first embodiment, and will not be repeated here.

The reinforcing steel plate 33 is fixedly connected between the back of the connecting head 32 and the connecting part, so as to improve the structural strength of the welding point between the bending part 312 and the connecting head 32, and both ends of the reinforcing steel plate 33 are bent to form hooks 331 The two side edges of the connecting portion 311 are snapped into the two hooks 331 , so that the connecting portion 311 is connected to the connecting head 32 through the hooks 331 of the reinforcing steel plate 33 . Utilizing the flexibility of the connecting portion 311 , the assembly connection between the connecting portion 311 and the hook 331 can be conveniently realized, thereby facilitating the connection between the connecting portion 311 and the connecting head 32 .

The above are the preferred embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered as the present invention. protection scope of the invention.

Claims (10)

1. A flexible circuit board, comprising a main body and a connector, characterized in that, one end of the main body is provided with a connecting portion and a bending portion, and the bending portion, the connecting portion and the main body are integrally formed; The bending part is U-shaped, one end of which is welded to the connecting head; the connecting part is connected between the other end of the bending part and the main body; the front of the connecting head is used for connecting with the connecting seat connected, and the back of the connecting head is fixedly connected with the connecting part. 2 . The flexible circuit board according to claim 1 , wherein the flexible circuit board further comprises a reinforcing steel plate; the reinforcing steel plate is fixed between the back surface of the connecting head and the connecting portion. 3. The flexible circuit board according to claim 2, characterized in that, both ends of the reinforcing steel plate are bent to form hooks, and the edges on both sides of the connecting part are respectively snapped into the two Checked. 4 . The flexible circuit board according to claim 1 , wherein the flexible circuit board further comprises a reinforcing steel plate; the connecting portion is fixed between the reinforcing steel plate and the back surface of the connector. 5. The flexible circuit board according to claim 1, wherein a connecting post is provided on the back of the connecting head, a through hole is provided on the connecting part, and the connecting post penetrates the through hole, so that An end of the connecting post far away from the connecting head is thermally fused to form a limiting portion, and the connecting portion is limited between the connecting head and the limiting portion. 6. The flexible circuit board according to claim 1, characterized in that, the flexible circuit board further comprises a buffer sleeve, the buffer sleeve is sleeved at the joint between the connecting portion and the main body, and the buffer sleeve and The connecting head is fixedly connected; the buffer sleeve is made of flexible material whose hardness is lower than that of the main body. 7 . The flexible circuit board according to claim 6 , wherein two connecting ears are provided on the outer side of the buffer sleeve, and the two connecting ears are respectively fixedly connected to two ends of the connecting head. 8 . 8 . The flexible circuit board according to claim 7 , wherein the connecting ears are ring-shaped, and the two connecting ears are sleeved on opposite ends of the connecting head respectively. 9 . The flexible circuit board according to claim 1 , wherein the connecting portion is glued to the back of the connecting head. 10 . 10. A mobile terminal, characterized in that the mobile terminal has the flexible circuit board according to any one of claims 1-9.