CN105792516A - Rigid-flex board and mobile terminal - Google Patents

Abstract

The utility model provides a soft or hard combination board and mobile terminal, including printed circuit board and flexible circuit board, printed circuit board establishes wiring portion and spread groove, the one side of printed circuit board is seted up to the spread groove, and keep away from wiring portion and set up, flexible circuit board includes the main part, connect in the first curb plate and the second curb plate of main part, the second curb plate is located one side of first curb plate, establish first binding post and connector on first curb plate and the second curb plate respectively, first binding post crimping is in wiring portion and electric connection in wiring portion, printed circuit board is located to the second curb plate fold, so that the connector block is in the spread groove. According to the rigid-flexible printed circuit board provided by the invention, the connector is arranged on the second side plate, the second side plate is overlapped on the printed circuit board, and the connector is clamped in the connecting groove of the printed circuit board, so that when the connector is wired to the main board, the impedance environment is unchanged because the connector is always positioned on the second side plate, and the impedance continuity of the connector during wiring is ensured.

Description

Rigid-flex board and mobile terminal

technical field

The invention relates to the technical field of circuit boards, in particular to a rigid-flex board and a mobile terminal.

Background technique

At present, when the industry sets up the USB (UniversalSerialBus Universal Serial Bus) signal connector, the USB signal connector is usually set on the printed circuit board, and then connected to the motherboard through a complete flexible circuit board to realize the USB signal connector. The signal transmission between the signal traces and the motherboard.

However, because the USB signal traces first pass through the printed circuit board and then connect to the flexible circuit board, the routing environment has changed, and the impedance environment on the printed circuit board is inconsistent with the impedance environment on the flexible circuit board. Impedance discontinuity is prone to occur in traces, which cannot meet the impedance connectivity requirements of signal traces.

Contents of the invention

In view of the above-mentioned problems in the prior art, the present invention provides a rigid-flex board and a mobile terminal capable of ensuring impedance connectivity of traces.

In order to achieve the above object, the present invention provides a rigid-flex board, which includes a printed circuit board and a flexible circuit board, the printed circuit board is provided with a wiring part and a connecting groove, and the connecting groove is opened in One side of the printed circuit board, and set away from the wiring part, the flexible circuit board includes a main body, a first side plate connected to the main body, and a second side plate, the second side plate is located on the One side of the first side plate, the first side plate and the second side plate are respectively provided with a first connection terminal and a connector, the first connection terminal is electrically connected to the connection part, and the second The side board is stacked on the printed circuit board, so that the connector is engaged in the connection slot.

Wherein, the first side plate includes a first connecting portion and a second connecting portion connected to the first connecting portion, the first connecting portion is connected to the main body, and the second connecting portion is provided with Describe the first terminal.

Wherein, a plurality of first pads are provided on the wiring portion, and a plurality of second pads are provided on the first connection terminal corresponding to the plurality of first pads, and the second pads are pressed together. on the first pad.

Wherein, the second side plate includes a first bending part, a second bending part and a third bending part, the first bending part is connected to the main body, and the second bending part is connected to the Between the first bending part and the third bending part, the third bending part is arranged parallel to the first bending part, and the connector is arranged on the third bending part.

Wherein, the printed circuit board is also provided with a first via hole, the first via hole is set on one side of the wiring part, and the side of the first bending part corresponds to the first via hole. The hole is provided with a second via hole, and when the second side plate is stacked on the printed circuit board, the second via hole is correspondingly connected with the first via hole.

Wherein, the printed circuit board is also provided with a third via hole, and the third via hole is provided on one side of the connection groove, and the second bending part is provided with a third via hole corresponding to the third via hole. Four via holes, when the second side plate is stacked on the printed circuit board, the fourth via hole and the third via hole correspond to pass through.

Wherein, the connector is a universal serial bus connector.

Wherein, the connection groove is a through groove, and the connection groove runs through one side of the printed circuit board.

Wherein, one end of the main body away from the first side plate and the second side plate is provided with a second connection terminal for connecting with electronic components.

In addition, the present invention also provides a mobile terminal using the above-mentioned rigid-flex board, the mobile terminal includes a main board and the above-mentioned rigid-flex board, and the rigid-flex board is electrically connected to the main board.

The rigid-flex board provided by the present invention is provided with wiring parts and connection grooves on the printed circuit board, and then the first side plate and the second side plate connected to the main body are set on the flexible circuit board, and the first side plate and the second side plate are connected to the main body. The side plates are respectively provided with a first connection terminal and a connector, and the first connection terminal is connected to the connection part, so as to realize electrical conduction between the flexible circuit board and the printed circuit board. Then the second side board is stacked on the printed circuit board, and the connector is snapped into the connection groove, so that when the connector is connected to the main board by wiring, since the connector is always located on the second side board Therefore, its impedance environment remains unchanged, thereby ensuring the impedance continuity of the connector during routing. At the same time, since the second side plate is fixed on the printed circuit board, the structural strength of the second side plate can be enhanced to ensure normal wiring and use of the connector.

Description of drawings

In order to more clearly illustrate the structural features and functions of the present invention, it will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of a rigid-flex board provided by an embodiment of the present invention;

Fig. 2 is an exploded schematic view of the rigid-flex board provided by the embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

For the convenience of description, spatial relative terms such as "under", "below", "below", "over", "upper" and other spatial relative terms can be used to describe the One element or feature shown in relationship to another element or feature(s). It will be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it can be directly on, directly on, or directly on the other element or layer. Connected or coupled to another element or layer, or intervening elements or layers may be present.

It should be understood that the terminology used herein is only used to describe specific embodiments, not to limit the present invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly dictates otherwise. Further, when used in this specification, the term "comprises" and/or "comprises" indicates the existence of said features, integers, steps, elements and/or components, but does not exclude one or more other features, integers, The presence or addition of steps, elements, components and/or combinations thereof. The following descriptions in the specification are preferred implementation modes for implementing the present invention, but the descriptions are for the purpose of illustrating the general principles of the present invention, and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be defined by the appended claims.

A mobile terminal provided by an embodiment of the present invention includes a main board (not shown in the figure) and a rigid-flex board, and the rigid-flex board is electrically connected to the main board.

In this embodiment, the mobile terminal may be, but not limited to, smart mobile terminal devices such as mobile phones, computers, and tablet computers. In this embodiment, the mobile terminal is taken as an example for description.

Please refer to FIG. 1 and FIG. 2 together, which are schematic structural diagrams of a rigid-flex board 100 provided by an embodiment of the present invention. The rigid-flex board 100 includes a printed circuit board 10 and a flexible circuit board 20, the printed circuit board 10 is provided with a wiring part 11 and a connection groove 12, and the connection groove 12 is set on a side of the printed circuit board 10. side, and set away from the wiring part 11. The flexible circuit board 20 includes a main body 21 , a first side plate 22 connected to the main body 21 , and a second side plate 23 , the second side plate 23 is located on one side of the first side plate 22 . The first side plate 22 and the second side plate 23 are respectively provided with a first connection terminal 221 and a connector 231 , and the first connection terminal 221 is electrically connected to the connection portion 11 . The second side plate 23 is stacked on the printed circuit board 10 to engage the connector 231 in the connection slot 12 .

In the rigid-flex board 100 provided by the embodiment of the present invention, the second side plate 23 is set on the flexible circuit board 20, and the connector 231 is set on the second side plate 23, and then the second side plate is used The board 23 is stacked on the printed circuit board 10 so that the connector 231 is located in the connecting groove 12 to enhance the structural strength of the connector 231 and the second side board 23 . At the same time, when the connector 231 is being routed to the motherboard of other devices, since the connector 231 is always arranged on the second side plate 23, the impedance connectivity of the connector 231 can be ensured. .

Specifically, the printed circuit board 10 is a square board. The printed circuit board 10 includes an upper surface 13, the upper surface 13 is provided with the wiring part 11, and the wiring part 11 is arranged adjacent to one end of the printed circuit board 10, so as to be connected with the flexible circuit board The first connecting terminal 221 of 20 is connected. Preferably, the connection portion 11 is provided with several first pads 111 arranged in sequence for connecting with the first connection terminal 221 .

Further, other electronic components (not shown) are arranged on the upper surface 13, for example, a receiver or a vibrator can be arranged on the upper surface 13 to realize other functions of the rigid-flex board.

In this embodiment, the connection groove 12 is set away from the connection part 11, so that when the connector 231 is engaged in the connection groove 12, the connector 231 can be prevented from being connected to the connection part. There is a problem of signal interference between 11. Specifically, the connection groove 12 is a through groove, and the connection groove 12 runs through one side of the printed circuit board 10 . And preferably, the connection groove 12 is a square groove matching the shape of the connector 231 . In addition, in order to facilitate the installation and engagement of the connector 231 , the corners of the connecting groove 12 are all arc transitions.

The flexible circuit board 20 is electrically connected to the printed circuit board 10 . In this embodiment, the main body 21 of the flexible circuit board 20 is a bar-shaped structure, and the end of the main body 21 away from the first side plate 22 and the second side plate 23 is provided with a second connection terminal 211 for Connect with other electronic components. Specifically, the second connecting terminal 211 may be provided with a pad, and the pad is used to connect with other electronic components, so as to realize the electrical conduction between the flexible circuit board 20 and other electronic components.

The main body 21 includes a forked end 212 , and the first side plate 22 and the second side plate 23 are respectively connected to the forked end 212 . In this embodiment, since the flexible circuit board 20 itself has softness and bending properties, the first side plate 22 can be a bent plate connected to the main body 21, including the first connecting portion 222 and The second connection part 223 connected to the first connection part 222 , the first connection part 222 is connected to the bifurcated end 212 , and the first connection terminal 221 is disposed on the second connection part 223 . Specifically, the first connecting portion 222 is a vertical strip structure, and the second connecting portion 223 is a horizontal strip structure connected to the first connecting portion 222 . Since the printed circuit board 10 is a square plate, by arranging the first connecting terminal 221 on the second connecting portion 223, the connection between the first connecting terminal 221 and the printed circuit board 10 can be facilitated. on the connection of the wiring part 11. Of course, it can be understood that the first side plate 22 can also be a strip plate or a plate with other structures, as long as the first connection terminal 221 is located at a location that facilitates connection with the connection portion 11 .

In this embodiment, the first connection terminal 221 is provided with several second pads 221a corresponding to the several first pads 111 on the connection part 11, and the several second pads 221a are connected to the The plurality of first pads 111 are correspondingly crimped, so as to realize electrical conduction between the flexible circuit board 20 and the printed circuit board 10 . Utilizing the electrical conduction between the flexible circuit board 20 and the printed circuit board 10, devices can be arranged on the printed circuit board 10, and then routed to the flexible circuit board 20, thereby eliminating the need for Components are directly arranged on the flexible circuit board 20 , which saves the layout space of the flexible circuit board 20 .

The second side plate 23 is a bent plate, including a first bent portion 232 , a second bent portion 233 and a third bent portion 234 , the first bent portion 232 is connected to the main body 21 , The second bending part 233 is connected between the first bending part 232 and the third bending part 234, and the third bending part 234 is arranged parallel to the first bending part 232, And the connector 231 is disposed on the third bent portion 234 . In this embodiment, the first bending portion 232 is a vertical strip structure, and the first bending portion 232 is arranged parallel to the first connecting portion 222 . The second bending part 233 is a horizontal strip plate, and the second bending part 233 is arranged parallel to the second connecting part 223, so that when the first side plate 22 and the second side When the plates 23 are respectively connected to the printed circuit board 10, the second side plate 23 and the first side plate 22 can not interfere with each other, thereby preventing the second side plate 23 and the first side plate 23 from Devices on the side board 22 experience signal interference.

The connector 231 is a universal serial bus (USB) connector to ensure that the hard-flex board has a USB connection function when it is connected to other devices. In this embodiment, the connector 231 is engaged in the connection slot 12 to fix the connector 231 on the printed circuit board 10 . Since the connector 231 is always located on the third bent portion 234, when the signal routing on the connector 231 needs to be connected to the main board of the mobile terminal, the signal routing of the connector 231 The wires always pass through the flexible circuit board 20 to reach the main board. Therefore, the impedance environment of the signal traces remains unchanged, so the impedance continuity can be guaranteed. In addition, because the third bent portion 234 is stacked on the printed circuit board 10 so that the connector 231 is located in the connecting groove 12, therefore, the third bent portion 234 and the The connection of the printed circuit board 10 can enhance the structural strength of the third bent portion 234 and ensure the normal use and routing of the connector 231 .

Further, the printed circuit board 10 is also provided with a first via hole 14, the first via hole 14 is provided on one side of the wiring part 11, and the side of the first bending part 232 is opposite to the other side. Corresponding to the first via hole 14, a second via hole 232a is provided. When the second side plate 23 is stacked on the printed circuit board 10, the second via hole 232a and the first via hole 14 corresponds to penetration. Specifically, the first through hole 14 and the second through hole 232a are used for fixing members (not shown in the figure), such as screws, to pass through, so as to fix the second side plate 23 to the printed circuit board. 10 , preventing the second side plate 23 from being displaced on the printed circuit board 10 , and ensuring that the connector 231 is always located in the connecting groove 12 . At the same time, the second side plate 23 can be connected to the printed circuit board 10 by using a fixing piece to pass through the first via hole 14 and the second via hole 232a to form a rigid-flex board, so that the The printed circuit board 10 can enhance the structural strength of the second side plate 23, preventing the second side plate 23 from being damaged due to improper operation or excessive force when the user inserts the connector 231, thereby causing the The connector 231 fails.

Further, the printed circuit board 10 is also provided with a third via hole 15, the third via hole 15 is provided on one side of the connection groove 12, and the second bent portion 233 corresponds to the first The third via hole 15 is provided with a fourth via hole 233a, and when the second side plate 23 is stacked on the printed circuit board 10, the fourth via hole 233a and the third via hole 15 correspond to pass through. Specifically, the fourth through hole 233 a and the third through hole 15 are used for fixing members, such as screws, to pass through, so as to further fix the second side plate 23 on the printed circuit board 10 .

It can be understood that, in other embodiments, the second side plate 23 can also be press-bonded on the printed circuit board 10 by using a pressing machine, or can also be provided on the second side plate 23 An adhesive layer, using the adhesive layer to stick the second side plate 23 on the printed circuit board 10 .

In the rigid-flex board 100 provided by the present invention, the wiring part 11 and the connection groove 12 are provided on the printed circuit board 10, and then the first side board 22 and the second side board 23 connected to the main body 21 are provided on the flexible circuit board 20, And the first side plate 22 and the second side plate 23 are respectively provided with a first connection terminal 221 and a connector 231, and the first connection terminal 221 is connected to the connection part 11, so as to realize the electrical connection between the flexible circuit board 20 and the printed circuit board 10. sexual conduction. Then the second side board 23 is stacked on the printed circuit board 10, and the connector 231 is snapped into the connection groove 12, so that when the connector 231 is connected to the main board by wiring, due to the connector 231 It is always located on the second side plate 23 , so its impedance environment remains unchanged, thereby ensuring the impedance continuity of the connector 231 when routing. At the same time, since the second side plate 23 is fixed on the printed circuit board 10 , the structural strength of the second side plate 23 can be enhanced to ensure the normal routing and use of the connector 231 .

In the description of this specification, references to the terms "one embodiment," "some embodiments," "example," "specific examples," "some examples," or the like "first embodiment" etc. A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The implementation methods described above do not constitute a limitation to the scope of protection of the technical solution. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above implementation methods shall be included in the protection scope of the technical solution.

Claims (10)

1. a Rigid Flex, it is characterized in that, described Rigid Flex includes printed circuit board (PCB) and flexible PCB, described printed circuit board (PCB) is provided with wire connecting portion and link slot, described link slot is opened in the side of described printed circuit board (PCB), and arrange away from described wire connecting portion, described flexible PCB includes main body, it is connected to the first side plate and second side plate of described main body, described second side plate is positioned at the side of described first side plate, described first side plate and the second side plate are respectively arranged with the first binding post and adapter, described first binding post is electrically connected at described wire connecting portion, described second side plate is stacked on described printed circuit board (PCB), so that described adapter is sticked in described link slot.

2. Rigid Flex according to claim 1, it is characterized in that, described first side plate includes the first connecting portion and the second connecting portion being connected with described first connecting portion, and described first connecting portion is connected to described main body, and described second connecting portion is provided with described first binding post.

3. Rigid Flex according to claim 1, it is characterized in that, being provided with several the first pads in described wire connecting portion, on described first binding post, corresponding several first pads described are provided with several the second pads, and described second pad is pressed on described first pad.

4. Rigid Flex according to claim 1, it is characterized in that, described second side plate includes the first bending part, the second bending part and the 3rd bending part, described first bending part is connected to described main body, described second bending part is connected between described first bending part and the 3rd bending part, described 3rd bending part and described first bending part be arranged in parallel, and are provided with described adapter on described 3rd bending part.

5. Rigid Flex according to claim 4, it is characterized in that, described printed circuit board (PCB) is further opened with the first via, described first via is located at the side of described wire connecting portion, on the side of described first bending part, corresponding described first via is provided with the second via, when described second side plate is stacked on described printed circuit board (PCB), described second via is corresponding through with described first via.

6. Rigid Flex according to claim 4, it is characterized in that, described printed circuit board (PCB) is additionally provided with the 3rd via, described 3rd via is located at the side of described link slot, described second corresponding described 3rd via of bending part is provided with the 4th via, when described second side plate is stacked on described printed circuit board (PCB), described 4th via is corresponding through with described 3rd via.

7. Rigid Flex according to claim 1, it is characterised in that described adapter is universal serial bus connector.

8. Rigid Flex according to claim 1, it is characterised in that described link slot is groove, and described link slot runs through the side of described printed circuit board (PCB).

9. Rigid Flex according to claim 1, it is characterised in that described main body is provided with the second binding post on the one end away from described first side plate and the second side plate, in order to be connected with electronic devices and components.

10. a mobile terminal, it is characterised in that described mobile terminal includes mainboard and the Rigid Flex as described in claim 1 to 9 any one, and described Rigid Flex is electrically connected at described mainboard.