Flexible printed circuit (FPC)

Abstract

The utility model discloses a flexible printed circuit (FPC), which comprises a flexible printed circuit body, the flexible printed circuit body is provided with a terminal area, a bending area and a welding area, the terminal area is parallel to the welding area, a terminal seat is fixedly arranged on the terminal area, a low-voltage pin header is arranged on the terminal seat, and low-voltage auxiliary power supply loop interfaces, thermistors and communication interfaces are symmetrically arranged on the welding area. A first connection confirmation signal interface, a second connection confirmation signal interface, a resistor and a ground wire interface are sequentially arranged on the central axis of the welding area, and the first connection confirmation signal interface, the low-voltage auxiliary power supply loop interface, the thermistor and the communication interface are connected with corresponding low-voltage pin headers through first microstrip lines. The beneficial effects of the utility model are mainly reflected in that the staggered arrangement is adopted, so that the lengths of the first microstrip line and the second microstrip line can be greatly shortened, and the layout is more compact. In addition, the large rectangular ends and the small rectangular ends are arranged on the connecting parts, light weight can be achieved, cost is greatly reduced, and enterprise development is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, and more specifically, to an FPC flexible printed circuit board. Background Technology

[0002] Flexible printed circuit boards (FPCs) are a crucial component in optical modules, connecting optical devices and circuit boards. An optical module typically includes a PCBA, devices, and a FPC. The FPC further comprises transmitting and receiving FPCs, which perform the electro-optical and optical-electrical conversions of the optical module, respectively. Due to their lightweight and high flexibility, FPCs are widely used in various fields, especially in the field of highly integrated optical modules.

[0003] The flexible board mentioned here refers to a flexible board that transmits high-speed signals. It is mainly used at the receiving end of optical modules to complete the conversion of optical signals to electrical signals.

[0004] For example, patent announcement number CN109068479A discloses a flexible printed circuit board (FPCB) and its assembly fixture, including a FPCB body. The FPCB body has a main via area and a standard pad area. Within the main via area, there is a set of main vias whose electrical networks correspond one-to-one with the electrical networks of the optical device pins to be fabricated or tested. Within the standard pad area, there is a set of standard pads whose electrical networks correspond one-to-one with the main vias. The FPCB body also includes a test pad area, located between the main via area and the standard pad area. Within the test pad area, there is a set of test pads whose electrical networks correspond one-to-one with the standard pads. In the above fixture, the main via area and the standard pad area are on the same plane, resulting in a large space occupation and hindering rational layout, thus having significant limitations. Furthermore, the neat arrangement of the main vias and standard pads on the FPCB body in this fixture leads to a significant waste of resources and increases enterprise costs. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an FPC flexible printed circuit board.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A flexible printed circuit board (FPC) includes a board body with a terminal area, a bending area, and a soldering area. The terminal area and the soldering area are parallel. A terminal base is fixed on the terminal area, and a low-voltage pin header is provided on the terminal base. The soldering area has a symmetrically arranged low-voltage auxiliary power supply circuit interface, a thermistor, and a communication interface. A first connection confirmation signal interface, a second connection confirmation signal interface, a resistor, and a grounding wire interface are sequentially arranged on the central axis of the soldering area. The first connection confirmation signal interface, the low-voltage auxiliary power supply circuit interface, the thermistor, and the communication interface are connected to the corresponding low-voltage pin headers via a first microstrip line. The second connection confirmation signal interface, the resistor, and the grounding wire interface are connected via a second microstrip line.

[0008] Preferably, the welding area is composed of a rectangular part, a connecting part and a fan-shaped part, the communication interface is disposed on both sides of the fan-shaped part, the low-voltage auxiliary power supply circuit interface is disposed on both sides of the rectangular part, the end side of the rectangular part is also provided with a protrusion, and the thermistor is disposed on the protrusion.

[0009] Preferably, the connection portion includes a large rectangular end and a small rectangular end, the second connection confirmation signal interface is disposed on the large rectangular end, the grounding wire interface is disposed on the fan-shaped portion, and the resistor is disposed on the small rectangular end.

[0010] Preferably, the terminal block is provided with eight low-voltage pin headers, one of which is a spare low-voltage pin header.

[0011] Preferably, the terminal area is provided with a guide groove, and the terminal base is provided with a guide post that is adapted to the guide groove.

[0012] Preferably, the terminal block is welded onto the terminal area.

[0013] The beneficial effects of this utility model are mainly reflected in:

[0014] 1. The staggered arrangement of the first connection confirmation signal interface, second connection confirmation signal interface, resistor, and grounding wire interface significantly shortens the lengths of the first and second microstrip lines, resulting in a more compact layout. Furthermore, the use of large and small rectangular ends in the connection section achieves lightweight design, reduces material usage, minimizes resource waste, and significantly lowers costs, which is beneficial for enterprise development.

[0015] 2. The parallel arrangement of the terminal area and the welding area can significantly reduce the axial space occupied, facilitate reasonable layout, make it more compact, and can be applied to more occasions, thus having a wide range of applicability.

[0016] 3. The backup low-voltage pin header can be adjusted and replaced when a pin header is damaged or unusable, which increases the service life of the flexible printed circuit board and can also reduce enterprise costs. Attached Figure Description

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0018] Figure 1 : Front view of the preferred embodiment of this utility model in its natural state;

[0019] Figure 2 : Front view of the preferred embodiment of this utility model after bending;

[0020] Figure 3 Side view of the preferred embodiment of this utility model after bending; Detailed Implementation

[0021] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 3 As shown, this utility model discloses an FPC flexible printed circuit board, including a flexible board body 1. The flexible board body 1 has a terminal area 11, a bending area 12, and a welding area 13, wherein the terminal area 11 and the welding area 13 are parallel. The above design is ingenious. The parallel arrangement of the terminal area 11 and the welding area 13 can significantly reduce the axial space occupied, facilitate reasonable layout, make it even more compact, and can be applied to more occasions, thus having a wide range of applicability.

[0025] Terminal base 2 is fixedly mounted on terminal area 11, and low-voltage pin header 3 is provided on terminal base 2. In this preferred embodiment, eight low-voltage pin headers 3 are provided on terminal base 2, one of which is a spare low-voltage pin header 3. Of course, the number of low-voltage pin headers 3 can also be other, and can be adjusted according to actual needs. All of these are within the protection scope of this utility model and will not be elaborated further here. As mentioned above, the provision of spare low-voltage pin headers 3 can be adjusted and replaced when a pin header is damaged or unusable, thereby increasing the service life of the flexible printed circuit board and reducing enterprise costs.

[0026] In this preferred embodiment, a guide groove 15 is provided on the terminal area 11, and a guide post 16 adapted to the guide groove 15 is provided on the terminal base 2. The cooperation between the guide post 16 and the guide groove 15 can improve the ease of assembly of the terminal base 2, play a guiding role, and improve work efficiency. In addition, the terminal base 2 is welded to the terminal area 11. Of course, other connection methods can also be used, such as riveting, crimping, snap-fitting, etc., all of which are within the protection scope of this utility model.

[0027] The welding area 13 is provided with a symmetrically arranged low-voltage auxiliary power supply circuit interface 4, a thermistor 5, and a communication interface 6. A first connection confirmation signal interface 7, a second connection confirmation signal interface 8, a resistor 81, and a grounding wire interface 82 are arranged sequentially on the central axis of the welding area 13. The first connection confirmation signal interface 7, the low-voltage auxiliary power supply circuit interface 4, the thermistor 5, and the communication interface 6 are connected to the corresponding low-voltage pin header 3 through a first microstrip line 14. The second connection confirmation signal interface 8, the resistor 81, and the grounding wire interface 82 are connected through a second microstrip line 83.

[0028] The welding area 13 consists of a rectangular portion 131, a connecting portion 132, and a sector-shaped portion 133. The communication interface 6 is located on both sides of the sector-shaped portion 133, and the low-voltage auxiliary power supply circuit interface 4 is located on both sides of the rectangular portion 131. A protrusion 134 is also provided on the end side of the rectangular portion 131, and the thermistor 5 is located on the protrusion 134. The connecting portion 132 includes a large rectangular end 135 and a small rectangular end 136. The second connection confirmation signal interface 8 is located on the large rectangular end 135, the grounding wire interface 82 is located on the sector-shaped portion 133, and the resistor 81 is located on the small rectangular end 136.

[0029] In this preferred embodiment, the first connection confirmation signal interface 7, the second connection confirmation signal interface 8, the resistor 81, and the grounding wire interface 82 are staggered, which can significantly shorten the length of the first and second microstrip lines, making the layout more compact. Furthermore, the connection section uses a combination of large and small rectangular ends, achieving lightweight design and significantly reducing costs, which is beneficial for enterprise development.

[0030] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0031] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An FPC flexible printed circuit board, comprising a flexible printed circuit board body (1), characterized in that: The flexible circuit board body (1) has a terminal area (11), a bending area (12) and a welding area (13). The terminal area (11) and the welding area (13) are parallel. A terminal seat (2) is fixed on the terminal area (11). A low-voltage pin header (3) is provided on the terminal seat (2). A low-voltage auxiliary power supply circuit interface (4), a thermistor (5) and a communication interface (6) are symmetrically arranged on the welding area (13). A first connection confirmation signal interface (7), a second connection confirmation signal interface (8), a resistor (81) and a grounding wire interface (82) are sequentially arranged on the central axis of the welding area (13). The first connection confirmation signal interface (7), the low-voltage auxiliary power supply circuit interface (4), the thermistor (5) and the communication interface (6) are connected to the corresponding low-voltage pin header (3) through a first microstrip line (14). The second connection confirmation signal interface (8), the resistor (81) and the grounding wire interface (82) are connected through a second microstrip line (83).

2. The FPC flexible printed circuit board according to claim 1, characterized in that: The welding area (13) is composed of a rectangular part (131), a connecting part (132) and a fan-shaped part (133). The communication interface (6) is located on both sides of the fan-shaped part (133). The low-voltage auxiliary power supply circuit interface (4) is located on both sides of the rectangular part (131). The end side of the rectangular part (131) is also provided with a protrusion (134). The thermistor (5) is located on the protrusion (134).

3. The FPC flexible printed circuit board according to claim 2, characterized in that: The connection part (132) includes a large rectangular end (135) and a small rectangular end (136). The second connection confirmation signal interface (8) is disposed on the large rectangular end (135), the grounding wire interface (82) is disposed on the fan-shaped part (133), and the resistor (81) is disposed on the small rectangular end (136).

4. The FPC flexible printed circuit board according to claim 1, characterized in that: The terminal block (2) is provided with eight low-voltage pin headers (3), one of which is a spare low-voltage pin header (3).

5. The FPC flexible printed circuit board according to claim 1, characterized in that: The terminal area (11) is provided with a guide groove (15), and the terminal base (2) is provided with a guide post (16) that is compatible with the guide groove (15).

6. The FPC flexible printed circuit board according to claim 5, characterized in that: The terminal block (2) is welded onto the terminal area (11).

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